Gas meter with high-stability sealing structure

Abstract

The utility model discloses a gas meter with a high-stability sealing structure, which belongs to the technical field of gas meters, and comprises a diaphragm capsule and a side cover in close contact with the diaphragm capsule, a diaphragm is arranged between the diaphragm capsule and the side cover, a cylindrical bulge is fixedly arranged on the inner side wall of the diaphragm capsule, a sleeve is fixedly arranged on the side cover, and the diaphragm capsule and the side cover are in close contact with each other. The sleeve is provided with an insertion hole matched with the cylindrical protrusion, the cylindrical protrusion is provided with an annular clamping groove, the side cover is provided with a cavity communicated with the annular clamping groove, a limiting block is installed in the cavity in a sliding mode, and the limiting block slides into the annular clamping groove to limit axial displacement of the cylindrical protrusion. The limiting blocks are located in the annular clamping grooves by sliding the limiting blocks so as to limit axial displacement of the cylindrical protrusions, fixation of the diaphragm capsule and the side cover is achieved, and the stability of connection of the diaphragm capsule and the side cover is further improved through the multiple limiting blocks arranged in the circumferential direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meters, and in particular relates to a gas meter with a high-stability sealing structure. Background Art

[0002] A gas meter is a precision instrument used to measure the volume of combustible gases such as natural gas, liquefied petroleum gas, coal gas, and biogas. Diaphragm gas meters rely on their internal metering mechanism for measurement. This mechanism is divided into four chambers, and accurate measurement is achieved through the intake and exhaust of these chambers. Therefore, the sealing of the metering mechanism is particularly important.

[0003] In the prior art, sealing methods generally involve positioning a diaphragm onto a cylindrical protrusion and then using rivets to compress and seal the membrane box, diaphragm, and side cover. For example, Chinese Patent Publication No. CN208488134U discloses a sealing structure for a gas meter metering mechanism, or Chinese Patent Publication No. CN220583497U discloses a sealing structure for a gas meter membrane box and side cover, in which circular ribs are clamped onto the outer wall of the side cover to achieve a sealed connection between the membrane box and the side cover. However, the connection methods described above, whether using rivets or circular rib clamping, lack stability.

[0004] Therefore, it is necessary to propose a gas meter with a high-stability sealing structure to solve the above problems. Utility Model Content

[0005] In view of this, an object of the present invention is to provide a gas meter with a high-stability sealing structure, so as to solve the problem of insufficient stability of the sealing connection between the membrane box and the side cover in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] The utility model provides a gas meter with a high-stability sealing structure, comprising a diaphragm box and a side cover in close contact with the diaphragm box, a membrane is provided between the diaphragm box and the side cover, the inner side wall of the diaphragm box is fixedly provided with a cylindrical protrusion, the side cover is fixedly provided with a sleeve, the sleeve is provided with a socket that cooperates with the cylindrical protrusion, the cylindrical protrusion is provided with an annular groove, the side cover is provided with a chamber connected to the annular groove, a limit block is slidably installed in the chamber, and the limit block sliding into the annular groove can limit the axial displacement of the cylindrical protrusion.

[0008] Furthermore, the side cover is provided with a strip-shaped hole communicating with the chamber, an extrusion block is slidingly connected in the strip-shaped hole, and the extrusion block and the limiting block are fixedly connected as a whole.

[0009] Furthermore, the outer wall of the sleeve is provided with a thread, the sleeve is threadedly connected to a threaded sleeve, an annular groove is provided in the threaded sleeve, the cross-section of the annular groove is truncated, the side wall of the extrusion block close to the annular groove is provided with an inclined surface that cooperates with the annular groove, the length of the annular groove is greater than the length of the extrusion block, and a compression spring is provided between the limit block and the inner wall of the chamber.

[0010] Furthermore, the limiting block is configured to be in an arc shape close to the cylindrical protrusion side and to cooperate with the annular groove.

[0011] Furthermore, the chambers are provided in plurality, and the plurality of chambers are circumferentially arranged on the side cover in the axial direction of the annular groove.

[0012] The beneficial effects of the present invention are:

[0013] The utility model uses a sliding limit block to locate the limit block in the annular groove to limit the axial displacement of the cylindrical protrusion, thereby fixing the membrane box and the side cover, and further improving the stability of the connection between the membrane box and the side cover through multiple limit blocks arranged circumferentially.

[0014] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0016] Figure 1 A side sectional view of the connection between the membrane box and the side cover according to an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the side cover at the sleeve of an embodiment of the present utility model.

[0018] The markings in the accompanying drawings are as follows: membrane box 1, cylindrical protrusion 101, annular groove 102, side cover 2, sleeve 201, jack 202, chamber 203, limit block 204, strip hole 205, extrusion block 206, threaded sleeve 207, annular groove 208, compression spring 209, membrane 3. DETAILED DESCRIPTION

[0019] like Figures 1-2As shown, the utility model provides a gas meter with a high-stability sealing structure, comprising: a diaphragm box 1 and a side cover 2 in close contact with the diaphragm box 1, the inner side wall of the diaphragm box 1 is fixedly provided with a cylindrical protrusion 101, the side cover 2 is fixedly provided with a sleeve 201, the sleeve 201 is provided with a socket 202 that cooperates with the cylindrical protrusion 101, a membrane 3 is provided between the diaphragm box 1 and the side cover 2, the cylindrical protrusion 101 is provided with an annular groove 102, the side cover 2 is provided with a plurality of chambers 203 that are circumferentially arranged in the axial direction of the annular groove 102 and connected to the annular groove 102, a limit block 204 is slidably installed in the chamber 203, and the limit block 204 slides into the annular groove 102 to limit the axial displacement of the cylindrical protrusion 101.

[0020] In this solution, after the membrane box 1 is inserted through the cylindrical protrusion 101 along the socket 202 on the side cover 2, the membrane 3 is pressed between the membrane box 1 and the side cover 2, and then the limit block 204 is slid so that the limit block 204 is located in the annular groove 102 to limit the axial displacement of the cylindrical protrusion 101, thereby fixing the membrane box 1 and the side cover 2, and further improving the stability of the connection between the membrane box 1 and the side cover 2 by multiple limit blocks 204 arranged circumferentially.

[0021] In one embodiment of the present invention, the side cover 2 is provided with a strip hole 205 communicating with the chamber 203 , an extrusion block 206 is slidably connected in the strip hole 205 , and the extrusion block 206 is fixedly connected to the limiting block 204 as a whole.

[0022] In this solution, by pressing the squeezing block 206 , the limiting block 204 can be driven to slide along the chamber 203 to enter or exit the annular slot 102 , so as to facilitate operation.

[0023] In one embodiment of the present utility model, the outer wall of the sleeve 201 is provided with a thread, and a threaded sleeve 207 is threadedly connected to the sleeve 201. An annular groove 208 is provided in the threaded sleeve 207, and the cross-section of the annular groove 208 is truncated cone-shaped. The side wall of the extrusion block 206 close to the annular groove 208 is provided with an inclined surface that cooperates with the annular groove 208, and the length of the annular groove 208 is greater than the length of the extrusion block 206; a compression spring 209 is provided between the limit block 204 and the inner wall of the chamber 203.

[0024] In this solution, rotating the threaded sleeve 207 can make the threaded sleeve 207 move along the axial direction of the sleeve 201. When the threaded sleeve 207 moves in the direction close to the membrane box 1, the threaded sleeve 207 moves the extrusion block 206 in the direction close to the annular groove 102 through the annular groove 208, thereby moving the limit block 204 into the annular groove 102 to limit the axial displacement of the cylindrical protrusion 101; when the threaded sleeve 207 is rotated in the opposite direction to move the threaded sleeve 207 in the direction away from the membrane box 1, the limit block 204 returns to the chamber 203 under the action of the compression spring 209, so as to facilitate the disassembly of the membrane box 1 and the side cover 2; and the threaded sleeve 207 is threadedly connected to the sleeve 201, so that after the threaded sleeve 207 moves to the preset position, the stability of the threaded sleeve 207 is guaranteed, thereby ensuring the stability of the sealing connection between the membrane box 1 and the side cover 2.

[0025] In one embodiment of the present invention, the limiting block 204 is configured to be arc-shaped near the cylindrical protrusion 101 and to fit the annular groove 102 , thereby ensuring a large contact area between the limiting block 204 and the annular groove 102 and further improving the limiting stability of the cylindrical protrusion 101 .

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A gas meter with a high-stability sealing structure, comprising a membrane box and a side cover in close contact with the membrane box, wherein a membrane is provided between the membrane box and the side cover, characterized in that: A cylindrical protrusion is fixedly provided on the inner side wall of the membrane box, a sleeve is fixedly provided on the side cover, a socket is provided on the sleeve that cooperates with the cylindrical protrusion, an annular groove is provided on the cylindrical protrusion, and a chamber connected to the annular groove is provided on the side cover. A limit block is slidably installed in the chamber, and the limit block slides into the annular groove to limit the axial displacement of the cylindrical protrusion.

2. The gas meter with a high-stability sealing structure according to claim 1, characterized in that: The side cover is provided with a strip-shaped hole communicating with the chamber, an extrusion block is limitedly and slidably connected in the strip-shaped hole, and the extrusion block and the limiting block are fixedly connected as a whole.

3. The gas meter with a high-stability sealing structure according to claim 2, characterized in that: The outer peripheral wall of the sleeve is provided with a thread, and a threaded sleeve is threadedly connected to the sleeve. An annular groove is provided in the threaded sleeve, and the cross-section of the annular groove is truncated cone-shaped. The side wall of the extrusion block close to the annular groove is provided with an inclined surface that cooperates with the annular groove. The length of the annular groove is greater than the length of the extrusion block, and a compression spring is provided between the limit block and the inner wall of the chamber.

4. The gas meter with a high-stability sealing structure according to claim 3, characterized in that: The limiting block is arranged in an arc shape close to the cylindrical protrusion side and matches the annular groove.

5. The gas meter with a high-stability sealing structure according to claim 4, characterized in that: There are multiple chambers, and the multiple chambers are circumferentially arranged on the side cover in the axial direction of the annular groove.

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