[19]
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`[51]
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`[12]
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`[21]
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`[45]
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`[11]
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`[22]
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`[73]
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`State Intellectual Property Office of the People’s Republic of China
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`Int.Cl7
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`G01L 19/06
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`Description of Utility Model
`
`ZL Patent No.: 01229889.1
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`Authorization Date: Nov. 27, 2002
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`Authorization No.: CN 2522849Y
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`Application Date: Jul. 6, 2001
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`Application No.: 01229889.1
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`Patentee: Beijing Brighty Machinery & Eclectronics Co., Ltd.
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`Address: No. 6, Weiyi Road, Chengshousi Road, Chaoyang District, Beijing
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`100078
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`[72]
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`Designers: He Chunwang; Rong Xiyuan; Yuan Xiaojun
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`1 sheet of Claims, 4 sheets of Description and 7 sheets of Drawings
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`[54] Title of Utility Model
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`Space-controlled Overpressure Protector
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`[57] Abstract
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`
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`The present utility model discloses a space-controlled overpressure protector,
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`which comprises a working medium, an upper connection body, a lower connection
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`body, bolts, a screw, a steel ball, an adjusting screw, and a function membrane (or a
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`plunger piston), and a controlled space is achieved by adjusting the amount of
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`displacement of the membrane (or the plunger piston). The membrane utilizes a concave
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`curved surface technology. The controlled space is locked reliably by the overturn of the
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`concave membrane, thereby providing overpressure protection for a pressure instrument.
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`CLAIMS
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`1. A space-controlled overpressure protector, comprising a working medium, an upper
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`connection body, a lower connection body, bolts, a screw, a steel ball, an adjusting screw,
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`and a function membrane or a plunger piston, wherein
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`
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`the upper connection body comprises a concave curved surface with a different
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`function at the center or a concave platform; the membrane is tightly clamped by the
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`upper and lower connection bodies with six bolts; and the lower connection body
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`comprises a concave curved surface with a different function at the center and a center
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`pressure introduction hole.
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`2. The space-controlled overpressure protector according to claim 1, wherein one side of
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`the upper connection body is provided with an air vent, the steel ball and the screw.
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`3. The space-controlled overpressure protector according to claim 1, wherein the top of
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`the upper connection body is provided with the adjusting screw.
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`4. The space-controlled overpressure protector according to claim 1, wherein the
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`function membrane comprises a concave curved surface, which extends along the
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`periphery and is provided with six bolt holes distributed uniformly.
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`5. The space-controlled overpressure protector according to claim 1, wherein the
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`material for the upper connection body, the lower connection body and the membrane or
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`plunger piston is selected from the group consisting of steel, aluminum, copper, ceramic
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`as well as plastic, rubber and latex, and a combination thereof.
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`DESCRIPTION
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`Space-Controlled Overpressure Protector
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`[0001] The present utility model is directed to a protector for protecting a
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`micropressure instrument (or a high-pressure instrument), and in particular to a
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`space-controlled protector with a function-curved-surface.
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`[0002] The micropressure instrument (or the high-pressure instrument) is a widely
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`used but costly and dangerous instrument. The micropressure or high-pressure media
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`used in a chemical production process are mostly harmful gases or liquids; therefore,
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`more and more requirements have arisen for overpressure protection.
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`[0003] In the prior art, an overpressure protector (see patent ZL99205775.8) operates
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`by controlling a valve mainly in a pressure comparison manner. The pressure ranges
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`from a minimum of 2KPA to a maximum of 50MPA.
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`[0004] An objective of the present utility model is to provide a protector based on a
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`space controlling technology. The pressure ranges from a minimum of 0.02KPA to a
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`maximum of 100MPA, which is the highest level in the world.
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`[0005] The objective of the present utility model is achieved through the following:
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`[0006] a space-controlled overpressure protector, comprising a working medium, an
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`upper connection body, a lower connection body, bolts, a screw, a steel ball, an
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`adjusting screw, and a function membrane (or a plunger piston), wherein
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`
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`1) the upper connection body comprises a concave curved surface with a
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`different function at the center and a center pressure introduction hole; the membrane is
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`tightly clamped by the upper and lower connection bodies with six bolts; and the lower
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`connection body comprises a concave curved surface with a different function at the
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`center and a center pressure introduction hole ;
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`
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`2) one side of the upper connection body is provided with an air vent, the steel
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`Nipro Ex. 1026
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`ball and the screw; and
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`
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`3) the material for the upper connection body, the lower connection body and
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`the membrane (or plunger piston) is selected from the group consisting of steel,
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`aluminum, copper, ceramic as well as plastic, rubber and latex, and a combination
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`thereof.
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`[0007] The present utility model has the following beneficial effects:
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`[0008] (1) according to the present utility model, the function concave curved surface
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`on the upper connection body and the function concave curved surface on the lower
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`connection body lock a certain amount of a compressible space with the membrane, so
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`that an instrument provides and limits a maximum air/liquid inlet amount based on the
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`movement of the membrane (or the plunger piston), thereby achieving the effect of
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`protection;
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`[0009] (2) according to the present utility model, the membrane (or the plunger piston)
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`isolates the direct connection between a detected medium and a pressure instrument,
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`thereby providing anti-corrosion protection for the pressure instrument;
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`[0010] (3) according to the present utility model, when the membrane (or the plunger
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`piston) appresses the upper connection body completely, the displacement of the
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`membrane (or the plunger piston) is locked, thereby ensuring [sic] the circumstances
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`in which continuous leakage of the detected medium occurs when the pressure
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`instrument is damaged due to its own reasons;
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`[0011] (4) the protector according to the present utility model is simple in structure
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`and has the following characteristics in manufacturing and maintenance:
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`
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`suitable materials are broadly and readily available, which may be selected
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`from the group consisting of steel, aluminum, copper, ceramic as well as plastic, rubber
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`and latex, and a combination thereof, and
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`
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`simplicity in maintenance, where except for the function membrane (or the O
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`ring) which needs to be inspected or replaced during regular instrument inspections,
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`other parts may not be damaged generally and well-adapted for long-term use; and
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`[0012] (5) the adjusting screw used in the present utility model may control the
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`different displacements of membrane.
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`[0013] FIG. 1 is a schematic diagram of a structure of an overpressure protector in the
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`prior art.
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`[0014] FIG. 2
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`is a schematic diagram of a structure of a micropressure
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`space-controlled overpressure protector of the present utility model.
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`[0015] FIG. 3 is a schematic diagram of a structure of a high-pressure space-controlled
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`overpressure protector of the present utility model.
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`[0016] FIG. 4 is a schematic diagram of a zero-pressure state used in a micropressure
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`space-controlled overpressure protector of the present utility model.
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`[0017] FIG. 5 is a schematic diagram of an overpressure protection state used in a
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`micropressure space-controlled overpressure protector of the present utility model.
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`[0018] FIG. 6 is a schematic diagram of a zero-pressure state used in a high-pressure
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`space-controlled overpressure protector of the present utility model.
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`[0019] FIG. 7 is a schematic diagram of an overpressure protection state used in a
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`high-pressure space-controlled overpressure protector of the present utility model.
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`[0020] Below descriptions are described herewith in relation to FIG. 2.
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`[0021] Reference signs used in FIG. 2 are as follows: 1-lower connection body,
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`101-bolt, 2-function membrane, 3-upper connection body, 301-adjusting screw,
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`302-steel ball, and 303-screw.
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`[0022] With reference to FIG. 2, the space-controlled overpressure protector provided
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`by the present utility model comprises:
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`
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`a lower connection body 1, which comprises a concave body with a function at
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`the center, is provided with an air vent in center, and threads for connecting with other
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`equipment at the lower part; and the lower connection body is provided with six
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`uniformly distributed through holes for the bolts 101;
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`
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`a function membrane 2,which has the same function as that of the function
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`concave lower connection body 1, extends along a circumference and is provided with
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`six uniformly distributed small holes for the bolts 101 to pass through;
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`an upper connection body 3, which comprises a concave body with a function
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`at the center and has the same function as that of the function concave lower connection
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`body 1, wherein the central of the upper connection body 3 is provided with a
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`movement thread for an adjusting screw 301, and one side of the upper connection body
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`is provided with a conical surface and a thread, with a small hole at the center of the
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`conical surface;
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`an adjusting screw 301, with a small hole in the center; and
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`a steel ball 302 and a screw 303, matching with the upper connection body.
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`[0023] The present utility model has the following structural characteristics and
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`working principle:
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`[0024] A service object of the space-controlled overpressure protector is a pressure
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`measuring instrument. The operation of the pressure measuring instrument is completed
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`by its inner pressure sensing element. The pressure sensing element has a certain space
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`inside. The pressure sensing element indicates pressure increase when the same medium
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`in the space increases in density, and it indicates pressure decrease when the same
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`medium in the space decreases in density. Based on the work principle above, the
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`space-controlled overpressure protector is to control the maximal density increment
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`required by an object to be protected through calculation during the operation under the
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`maximum pressure sensing condition.
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`[0025] 1. FIG. 4 is a normal state of the micropressure space-controlled overpressure
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`protector. Before the pressure is introduced, the function membrane 2 falls naturally,
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`and a certain amount of space (based on a specific and accurate calculation) is formed
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`by the enclosure of the function membrane 2 and the upper connection body 3, and the
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`space is controlled. FIG. 5 shows that after the pressure is introduced to the bottom of
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`the lower connection body 1, the membrane plays a role of isolation and is lifted up by
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`the introduced air or liquid medium, and the original air or liquid (a working medium)
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`in the controlled space is compressed and is partially and even fully squeezed out of the
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`controlled space to enter a space of the pressure sensing element, thereby increasing the
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`density of a medium of the pressure sensing element. When the function membrane 2 is
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`overturned under the action of the introduced pressure and tightly appressed to the
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`concave curved surface of the upper connection body 3, the function membrane is
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`restricted from any further movement, and the upper connection body 3 limits
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`(withstands) the movement of the function membrane 2 such that the density in the
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`space in the pressure sensing element is constant. Although a small part of function
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`membrane 2 deforms at where the center hole of the adjusting screw 301 is located, the
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`influence of the deformation of the function membrane 2 can be controlled within an
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`allowable range below 0.5% based on calculation and design.
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`[0026] 2. FIG. 6 is a normal state of the high-pressure space-controlled overpressure
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`protector. Before the pressure is introduced, the plunger piston 2 undergoes zero
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`pressure in both the upper part and the lower part and thus is in a balanced state,
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`however, a certain amount of space (based on a specific and accurate calculation) is
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`present between the part above the O-ring 201 of the plunger piston 2 and the upper
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`connection body 3 and is under control. FIG. 7 shows that after the pressure is
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`introduced to the bottom of the lower connection body 1, the plunger piston 2 plays a
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`role of isolation and is jacked up by the introduced air or liquid medium, and the
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`original liquid (a working medium) in the controlled space is compressed and is
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`partially and even fully squeezed out of the controlled space to enter a space of the
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`Nipro Ex. 1026
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`pressure sensing element, thereby increasing the density of a medium of the pressure
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`sensing element. When the plunger piston 2 moves upwards under the impact of
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`introduced pressure and tightly appresses to a concave platform of the upper connection
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`body 3, the plunger piston 2 may not move any further, and the upper connection body 3
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`limits (withstands) the movement of the plunger piston 2 such that the density in the
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`space in the pressure sensing element is constant. Although certain movement friction
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`force is present between the O-ring 201 on the plunger piston 2 and the upper
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`connection body 3, the movement friction force is generally 0.4MPA or less, therefore,
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`the influence of internal resistance is very little during operation under 10MPA or
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`higher.
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`[0027] When the pressure introduction at the bottom of the lower connection body 1 is
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`removed or decreased, the high pressure at the upper part of the function membrane 2
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`(plunger piston) will push the function membrane (plunger piston) 2 into a new
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`balanced point (a pressure difference between the upper part and the lower part is about
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`zero) until recovering to a state as shown in FIG. 4 (or FIG. 6).
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`FIG. 4
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`FIG. 7
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`FIG. 7
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`TRANSLATOR ’ S DE CLARAT ION
`
`I, Mao LIQUN of MY Intellectual Property Firm residing at Floor
`
`3, Tower B, Fareast International Plaza, 317 Xianxia Road,
`
`Shanghai 200051 P.R.CHINA,
`
`am a Chinese language translator
`
`with 20 years of experience translating technical, legal, and
`
`business documents from Chinese to English and from English to
`
`Chinese . Being fluent in both the Chinese and English languages ,
`
`I certify under penalty of perjury under the laws of the United
`
`States that:
`
`1 . To the best of my knowledge and belief, the preceding document
`
`is a true and correct English translation of ChineseExamined
`
`Utility Model Publication No. CN 25228491’. Paragraph numbers
`
`have been added,
`
`to aid in citation;
`
`2 .All statements made herein of my own knowledge are true and
`
`that all statements made on information and belief are believed
`
`to be true; and
`
`3 .This declaration was made with knowledge that willful false
`
`statements and the like so made are punishable by fine or
`
`imprisonment or both under 18 U.S.C.
`
`§ 1001.
`
`Date: March 3, 2016
`
`Translator Name:
`
`Mao LIQUN
`
`I‘
`
`W
`
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