CN213422283U

CN213422283U - Diaphragm seal structure

Info

Publication number: CN213422283U
Application number: CN202022750419.2U
Authority: CN
Inventors: 韦雅玲; 黎林; 李波; 刘琴; 李筱雅
Original assignee: CHONGQING SHANCHENG GAS EQUIPMENT CO LTD
Current assignee: CHONGQING SHANCHENG GAS EQUIPMENT CO LTD
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-06-11
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to a diaphragm seal structure, including measurement shell (1), diaphragm (2) and measurement cap (3), be equipped with reference column (4) on measurement shell (1), diaphragm (2) with all be equipped with on measurement cap (3) with locating hole (5) corresponding with reference column (4), be equipped with sealed arch (31) on measurement cap (3), be equipped with on measurement shell (1) with sealed protruding (31) corresponding sealed face (11); and a second sealing surface (32) is arranged on the inner side of the sealing bulge (31), and a second sealing bulge (12) corresponding to the second sealing surface (32) is arranged on the inner side of the sealing surface (11). The utility model discloses a diaphragm seal structure, simple structure, the leakproofness is good, and sealed equipment convenient operation is swift.

Description

Diaphragm seal structure

Technical Field

The utility model relates to a gas table field especially relates to a diaphragm seal structure.

Background

The existing diaphragm gas meter is used for diaphragm sealing and usually adopts a method of ultrasonic sealing and sealant double-sided sealing.

In the ultrasonic sealing technology, a leather membrane assembly is arranged between a metering shell cover and a metering shell, the leather membrane assembly comprises a metering shell rubber ring, a membrane and a membrane pressing plate, a positioning column is arranged on the metering shell, the metering shell rubber ring, the membrane and the membrane pressing plate are sequentially arranged on the positioning column, then the positioning column is welded and fixed by an ultrasonic welding machine, finally, a sealing glue is coated on the periphery of the metering shell, and the metering shell cover is buckled on the metering shell. According to the technical scheme, multiple ultrasonic welding machines are needed in a production line, and the production cost is high. And the parts that need to install are more, and the process flow is comparatively complicated, and the ultrasonic welding process is irreversible again, melts the postioning post, in case leak hunting device detects the gas leakage, will lead to whole gas table to scrap.

In the sealant double-sided sealing technology, a first layer of sealant is coated on the periphery of a metering shell, a diaphragm is fixed on the metering shell through a positioning column, a second layer of sealant is coated on the outer side of the diaphragm, and a metering shell cover is buckled on the metering shell. Compared with the technical scheme of ultrasonic sealing, the technical scheme simplifies the production flow and solves the problem of inconsistent sealing performance due to the problems of glue coating uniformity and the like of the same batch of products, but the production efficiency is low because glue is still required to be coated twice in one-time assembly process, and the sealing effect is common. Meanwhile, the scheme of sealing the two sides of the sealant is basically an irreversible assembly mode, because once a problem occurs, the metering shell, the diaphragm and the metering shell cover are disassembled, glue remains, and the sealant is difficult to use or used for a second time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem, provide a sealed effectual diaphragm seal structure.

In order to achieve the above object of the present invention, the present invention provides a diaphragm sealing structure, which comprises a measuring shell, a diaphragm and a measuring shell cover, wherein the measuring shell is provided with a positioning column, the diaphragm and the measuring shell cover are both provided with positioning holes corresponding to the positioning column, the measuring shell cover is provided with a sealing protrusion, and the measuring shell is provided with a sealing surface corresponding to the sealing protrusion;

and a second sealing surface is arranged on the inner side of the sealing protrusion, and a second sealing protrusion corresponding to the second sealing surface is arranged on the inner side of the sealing surface.

According to an aspect of the utility model, sealed protruding being close to the side of sealed face is first side, and first side is the plane, and sealed face with first side parallel arrangement.

According to the utility model discloses an aspect, sealed protruding with the side that the sealed face of second is connected is the second side, the second side is the inclined plane, the second side with first side contained angle is less than 90.

According to an aspect of the present invention, the second sealing surface is configured as an inclined plane, and the second sealing surface and the included angle between the second side surfaces are smaller than 90 °.

According to the utility model discloses an aspect, the protruding orientation of second seal the side of the sealed face of second is the third side, the third side with sealed face mutual parallel arrangement.

According to an aspect of the utility model, on the second sealed arch with the side that sealed face is adjacent is the fourth side is the inclined plane, and with the contained angle of sealed face is greater than 90.

According to an aspect of the invention, the sealing surface is a vertical plane or an inclined plane.

According to an aspect of the present invention, the junction of the third side and the fourth side of the second sealing protrusion is provided with a fillet.

According to an aspect of the utility model, sealed bellied first side and second side junction are equipped with the second fillet.

The utility model discloses a diaphragm sealing structure, a sealing bulge is arranged on a metering shell cover, and a sealing surface corresponding to the sealing bulge is arranged on the metering shell; the inner side of the sealing bulge is provided with a second sealing surface, and the inner side of the sealing surface is provided with a second sealing bulge corresponding to the second sealing surface. So set up, after the diaphragm is to the reference column, seal the diaphragm through the cooperation of measurement cap and measurement shell, specifically, sealed protruding cooperatees with sealed face, and sealed protruding and the sealed face of second further cooperatees in sealed bellied inboard and is used for sealed diaphragm, and then forms the dislocation sealed to the diaphragm, and it guarantees with the leakproofness. Compare the ultrasonic seal among the prior art and sealed two-sided sealing of gluing, the utility model discloses a diaphragm seal structure, simple structure can realize fast that it is fixed to the sealed of diaphragm, and is efficient, measures the shell simultaneously and measures the shell and for dismantling the connection with the measurement cap, has avoided among the prior art ultrasonic seal and sealed leading to assembling irreversible problem of gluing.

The utility model discloses a diaphragm seal structure is injectd the setting according to the aforesaid the utility model discloses a sealed face, sealed arch, the sealed face of second and the sealed arch of second can be so that the second side along its direction to sealed face extension, and is bigger more to the extrusion force of diaphragm, and the leakproofness is more and more good. And the extrusion force of the second sealing surface to the diaphragm along the direction away from the sealing bulge is larger and larger, and the sealing performance is better and better. Thereby guaranteed the leakproofness of the department of bending of diaphragm and the leakproofness of the department of meeting with the diaphragm cavity is inside, simultaneously because the rational distribution of power is favorable to the protection to the diaphragm again, avoided the dislocation to bend the influence to diaphragm motion and its life-span.

Drawings

Figure 1 schematically shows a sealing diagram of a diaphragm seal structure according to the invention;

fig. 2 schematically shows a partially enlarged view a of fig. 1.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the present invention provides a diaphragm sealing structure, which comprises a measuring shell 1, a diaphragm 2 and a measuring shell cover 3. Wherein be equipped with reference column 4 on the measurement shell 1, all be equipped with on diaphragm 2 and the measurement shell 3 with reference column 3 corresponding locating hole 5, during the equipment, diaphragm 2 passes through locating hole 5 to be fixed on reference column 4 of measurement shell 1, then measures the cap 3 and is connected with measurement shell 1 lock through locating hole 5.

Referring to fig. 1 and 2, a sealing protrusion 31 is provided on the metering shell cover 3, and a sealing surface 11 corresponding to the sealing protrusion 31 is provided on the metering shell 1; the inner side of the sealing projection 31 is provided with a second sealing surface 32, and the inner side of the sealing surface 11 is provided with a second sealing projection 12 corresponding to the second sealing surface 32. So set up, after diaphragm 2 to reference column 4, seal diaphragm 2 through the cooperation of measurement shell lid 3 with measurement shell 1, specifically, sealed protruding 31 cooperatees with sealed face 11, and the sealed protruding 12 of second and the sealed face 32 of second further cooperate in the inboard of sealed protruding 31 and be used for sealed diaphragm 2, and then form the dislocation sealed to diaphragm 2, and it guarantees with the leakproofness. Compare the ultrasonic seal among the prior art and sealed two-sided sealing of gluing, the utility model discloses a diaphragm seal structure, simple structure can realize fast that it is fixed to the sealed of diaphragm 2, and is efficient, measures shell 1 simultaneously and measures the shell cover 3 and for dismantling the connection, has avoided among the prior art ultrasonic seal and sealed leading to assembling irreversible problem of gluing.

As shown in fig. 1 and fig. 2, the side of the sealing protrusion 31 close to the sealing surface 11 is the first side 311, the first side 311 is a plane, and the sealing surface 11 is parallel to the first side 311. The side of the sealing protrusion 31 that is connected to the second sealing surface 32 is a second side 312, the second side 312 is an inclined plane, and the angle between the second side 312 and the first side 311 is less than 90 °. The second sealing surface 32 is arranged as an inclined plane, the angle between the second sealing surface 32 and the second side surface 312 being less than 90 °.

The utility model discloses a side of sealed protruding 12 orientation second seal face 32 of second is third side 121, third side 121 and sealed face 11 parallel arrangement each other. The side of the second sealing protrusion 12 adjacent to the sealing surface 11 is a fourth side 122, and the fourth side 122 is an inclined plane and forms an angle greater than 90 ° with the sealing surface 11.

According to the utility model discloses a mode, sealed face 11 sets up to vertical plane, prescribes a limit to the setting according to the aforesaid the utility model discloses a sealed face 11, sealed arch 31, the sealed face 32 of second and the sealed arch 12 of second can be so that second side 312 along its direction to sealed face 11 extension, and is bigger more to diaphragm 2's extrusion force, and the leakproofness is more and more good. And the second sealing surface 32 is forced to the membrane 2 in a direction away from the sealing projection 31 with a greater and greater pressure, the sealing is better and better. Thereby guaranteed the leakproofness of the department of bending of diaphragm 2 and the leakproofness of the department of meeting with the diaphragm cavity is inside, simultaneously because the rational distribution of power is favorable to the protection to diaphragm 2 again, avoided the dislocation to bend the influence to diaphragm motion and its life-span. Of course, according to the utility model discloses an according to the design, this practical sealing surface 11 can also set up to the inclined plane, can play above-mentioned effect equally, no longer gives unnecessary details.

As shown in fig. 2, according to an embodiment of the present invention, a junction of the third side 121 and the fourth side 122 of the second sealing protrusion 12 is provided with a rounded corner 123. Due to the arrangement, the second sealing bulge 12 can be prevented from damaging the moving diaphragm in the moving process of the moving diaphragm, and the durability of the diaphragm 2 can be improved.

Of course, the junction of the first side 311 and the second side 312 of the sealing protrusion 31 may also be provided with a second rounded corner according to the inventive concept. Damage to the membrane 2 can likewise be avoided, increasing its service life.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A diaphragm sealing structure comprises a metering shell (1), a diaphragm (2) and a metering shell cover (3), wherein a positioning column (4) is arranged on the metering shell (1), and positioning holes (5) corresponding to the positioning column (4) are respectively arranged on the diaphragm (2) and the metering shell cover (3), and is characterized in that a sealing bulge (31) is arranged on the metering shell cover (3), and a sealing surface (11) corresponding to the sealing bulge (31) is arranged on the metering shell (1);

and a second sealing surface (32) is arranged on the inner side of the sealing bulge (31), and a second sealing bulge (12) corresponding to the second sealing surface (32) is arranged on the inner side of the sealing surface (11).

2. The diaphragm seal structure according to claim 1, wherein the side of the seal protrusion (31) adjacent to the seal face (11) is a first side face (311), the first side face (311) is a plane, and the seal face (11) is arranged in parallel with the first side face (311).

3. The diaphragm seal structure of claim 2, wherein the side of the sealing protrusion (31) connected to the second sealing surface (32) is a second side surface (312), the second side surface (312) is an inclined plane, and the second side surface (312) forms an angle of less than 90 ° with the first side surface (311).

4. The diaphragm seal structure of claim 3, characterized in that the second sealing surface (32) is provided as an inclined plane, the angle between the second sealing surface (32) and the second side surface (312) being less than 90 °.

5. The diaphragm seal structure of claim 4, characterized in that the side of the second sealing projection (12) facing the second sealing surface (32) is a third side (121), the third side (121) being arranged parallel to the sealing surface (11).

6. The diaphragm seal structure of claim 5, wherein the side of the second seal protrusion (12) adjacent to the seal surface (11) is a fourth side (122), and the fourth side (122) is an inclined plane and forms an angle of more than 90 ° with the seal surface (11).

7. The diaphragm seal structure according to claim 6, characterized in that the seal face (11) is a vertical plane or an inclined plane.

8. The diaphragm seal structure of claim 7, wherein a junction of the third side (121) and the fourth side (122) of the second seal protrusion (12) is provided with a rounded corner (123).

9. The diaphragm seal structure of claim 8, wherein the junction of the first side (311) and the second side (312) of the seal protrusion (31) is provided with a second rounded corner.