Gas meter with backflow prevention function

Abstract

The utility model discloses a gas meter with an anti-backflow function. The gas meter comprises a meter body, a gas feeding pipe arranged in the meter body, a driving assembly arranged on the surface of the lower end of the gas feeding pipe and a sealing assembly arranged in the rear side of the left end of the gas feeding pipe, when leftward reverse flow gas is generated in the gas feeding pipe, flowing gas drives an impeller to rotate, and therefore a first bevel gear connected with the rear end is driven to rotate; threads arranged on the outer wall are meshed to drive a second bevel gear on the left side to rotate, when the second bevel gear rotates, a third bevel gear connected with the left end can be driven to rotate, a sleeve plate is driven to move downwards in a sliding groove through the threads arranged on the outer wall, and a sealing plate is driven to move downwards in an air supply pipe under the limiting effect that a limiting plate is embedded in a limiting groove. Therefore, circulation is blocked, the anti-backflow effect is achieved, and the anti-backflow stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas table technical field, concretely is a kind of gas table with anti-backflow function. BACKGROUND

[0002] People's daily cooking fuel has changed from wood, coal and other resources waste seriously, pollution seriously conventional energy into natural gas and coal gas, even clean energy such as electricity. Here gas table plays its role, its automatic accumulation function makes those who use natural gas or piped gas family can conveniently know how much gas is used, so as to be able to pay according to the cubic meter number of monthly consumption gas.

[0003] The existing public patent (announcement number CN221745160U) discloses a kind of gas table with anti-backflow function, adopt the cooperation of air inlet pipe, lug, sealing washer one, sealing plate, spring one, fixed plate, spring two, sealing washer two, air outlet pipe, by connecting the air inlet pipe and air outlet pipe of gas table with the air inlet pipe and air outlet pipe of gas pipeline respectively, in the process of connection, gas pipe is inserted into gas table, under the action of gas pipe thrust, gas pipeline and sealing washer two side lap, so that it is sealed, then push spring two and compress, under the action of spring two reaction force, make sealing washer two and gas pipe one end adhere, so that its sealing effect is better, solve the sealing effect of gas table and pipeline interface in the process of using gas table, gas is easy to leak from connecting place, there is certain inconvenience problem.

[0004] However, there are some problems in the use of existing gas table: 1, the existing anti-backflow assembly is pushed to the sealing plate by spring, so that the sealing plate closes the air inlet pipe, but the pushing force of spring itself is unstable, which can not effectively lock the sealing of sealing plate, and affects the anti-backflow effect. 2, and the existing gas table anti-backflow assembly is driven by a separate spring, when it needs to be closed, it needs to be sealed by external operation, which affects the convenience of sealing. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of gas table with anti-backflow function to solve the problems raised in the above background.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: including table body, the drive assembly of the gas pipe surface of setting in the gas pipe lower end of setting in the table body interior and the closure assembly of setting with the left end rear interior of gas pipe;

[0007] The driving assembly comprises a bottom groove formed in the inner surface of the lower end of the gas feeding pipe, a impeller rotatably arranged in the bottom groove, a rear groove formed in the rear side of the bottom groove, a first bevel gear arranged on the inner wall of the front end of the rear groove, and a second bevel gear arranged on the inner wall of the left side of the rear groove and matched with the first bevel gear.

[0008] The closing assembly comprises an inner groove formed in the rear side of the left end of the gas feeding pipe, a third bevel gear arranged on the inner wall of the right end of the inner groove, and a fourth bevel gear arranged on the inner wall of the upper end of the inner groove and matched with the third bevel gear.

[0009] As a further scheme of the utility model, a sliding groove is formed in the upper side of the inner groove, a screw rod is arranged in the sliding groove, and a sleeve plate is matched and sleeved on the outer wall of the screw rod.

[0010] As a further scheme of the utility model, a limiting groove is formed in the rear side of the sliding groove, and a limiting plate is arranged on the rear side of the sleeve plate and matched with the limiting groove.

[0011] As a further scheme of the utility model, a sealing plate is matched and arranged on the front side surface of the sleeve plate.

[0012] As a further scheme of the utility model, the rotating input end of the third bevel gear is matched and connected with the rotating output end of the second bevel gear.

[0013] As a further scheme of the utility model, the rotating input end of the screw rod is matched and connected with the rotating output end of the fourth bevel gear.

[0014] As a further scheme of the utility model, the cross-sectional dimension of the sealing plate is matched with the cross-sectional dimension of the gas feeding pipe.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. When reverse flow gas is generated in the gas feeding pipe, the flowing gas drives the impeller to rotate, thereby driving the first bevel gear connected at the rear end to rotate, and the second bevel gear on the left side is driven to rotate through the thread engagement arranged on the outer wall, so that the reverse flow prevention equipment can be automatically operated under the flowing gas without the help of manpower or external operation, and the convenience of reverse flow prevention is improved.

[0017] 2. When the second bevel gear rotates, the third bevel gear connected at the left end is driven to rotate, the fourth bevel gear at the upper end is driven to rotate through the thread engagement arranged on the outer wall, the screw rod connected at the upper end is driven to rotate by the fourth bevel gear, the sleeve plate is driven to move downward in the sliding groove through the thread engagement arranged on the outer wall, the sealing plate is driven to move downward in the gas feeding pipe under the limitation of the limiting plate embedded in the limiting groove, and the gas feeding pipe is closed, so that the flow is blocked to achieve the effect of reverse flow prevention, and the stability of reverse flow prevention is improved. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the driving component and the enclosure component according to an embodiment of the present utility model;

[0020] Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified view of part A in the diagram.

[0021] In the diagram: 1. Body; 2. Air supply pipe; 301. Bottom groove; 302. Impeller; 303. Rear groove; 304. First bevel gear; 305. Second bevel gear; 401. Inner groove; 402. Third bevel gear; 403. Fourth bevel gear; 404. Slide groove; 405. Screw; 406. Sleeve plate; 407. Sealing plate; 408. Limiting groove; 409. Limiting plate. Detailed Implementation

[0022] To facilitate the solution of the problem, this utility model provides a gas meter with anti-backflow function. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example 1

[0024] like Figures 1 to 3 As shown, this embodiment provides a gas meter with anti-backflow function, including meter body 1, gas supply pipe 2 disposed inside meter body 1, drive assembly disposed on the lower end surface of gas supply pipe 2, and sealing assembly disposed inside the rear left side of gas supply pipe 2.

[0025] The drive assembly includes a bottom groove 301 formed on the inner surface of the lower end of the air supply pipe 2. An impeller 302 is rotatably mounted inside the bottom groove 301. A rear groove 303 is formed on the rear side of the bottom groove 301. A first bevel gear 304 is provided on the inner wall of the front end of the rear groove 303. A second bevel gear 305 that cooperates with the first bevel gear 304 is provided on the inner wall of the left side of the rear groove 303.

[0026] The sealing assembly includes an inner groove 401 located inside the rear left side of the air supply pipe 2. A third bevel gear 402 is provided on the inner wall of the right end of the inner groove 401, and a fourth bevel gear 403 that cooperates with the third bevel gear 402 is provided on the inner wall of the upper end of the inner groove 401.

[0027] Embodiment Two

[0028] In addition to comprising all the technical features in Embodiment One, the embodiment further comprises: a chute 404 is formed on the upper side of the inner groove 401, a screw rod 405 is arranged inside the chute 404, a sleeve plate 406 is sleeved on the outer wall of the screw rod 405, and the screw rod 405 rotates to drive the sleeve plate 406 to move downward in the chute 404 through the thread engagement on the outer wall.

[0029] Further, a limiting groove 408 is formed on the rear side of the chute 404, and a limiting plate 409 is arranged on the rear side of the sleeve plate 406 and matched with the limiting groove 408, so that the limiting plate 409 is limited in the limiting groove 408 to drive the sealing plate 407 to move downward in the air supply pipe 2 and close the air supply pipe 2.

[0030] Further, the sealing plate 407 is arranged on the front side surface of the sleeve plate 406, so that the sealing plate 407 is driven to move downward in the air supply pipe 2 and close the air supply pipe 2, thereby achieving the effect of blocking the flow and preventing backflow.

[0031] Further, the rotating input end of the third bevel gear 402 is connected with the rotating output end of the second bevel gear 305, the third bevel gear 402 rotates to drive the fourth bevel gear 403 at the upper end to rotate through the thread engagement on the outer wall.

[0032] As a further scheme of the utility model, the rotating input end of the screw rod 405 is connected with the rotating output end of the fourth bevel gear 403, and the fourth bevel gear 403 drives the screw rod 405 connected at the upper end to rotate.

[0033] As a further scheme of the utility model, the cross-sectional dimension of the sealing plate 407 is matched with the cross-sectional dimension of the air supply pipe 2, the sealing plate 407 moves downward in the air supply pipe 2 to close the air supply pipe 2, and backflow prevention is more effective.

[0034] Working principle: when the reverse flow gas in the inside of the gas pipe 2 generates to the left, the flowing gas drives the impeller 302 to rotate, thereby driving the first bevel gear 304 connected at the rear end to rotate, driving the second bevel gear 305 on the left to rotate through the screw thread engagement arranged on the outer wall, that is, the anti-backflow device can be automatically operated under the flowing gas, without the help of manpower or external operation, improving the convenience of anti-backflow, when the second bevel gear 305 rotates, the third bevel gear 402 connected at the left end rotates, the fourth bevel gear 403 at the upper end rotates through the screw thread engagement arranged on the outer wall, the screw rod 405 connected at the upper end rotates, the sleeve plate 406 moves down in the sliding groove 404, under the limiting of the limiting plate 409 embedded in the limiting groove 408, the sealing plate 407 moves down in the gas pipe 2, the gas pipe 2 is closed, thereby realizing the blockage of flow to achieve the effect of anti-backflow, improving the stability of anti-backflow.

[0035] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0036] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A gas meter with anti-backflow function, characterized in that: It includes a meter body (1), an air supply pipe (2) disposed inside the meter body (1), a drive assembly disposed on the lower end surface of the air supply pipe (2), and a sealing assembly disposed inside the rear left side of the air supply pipe (2). The drive assembly includes a bottom groove (301) formed on the inner surface of the lower end of the air supply pipe (2), an impeller (302) is rotatably mounted inside the bottom groove (301), a rear groove (303) is formed on the rear side of the bottom groove (301), a first bevel gear (304) is provided on the inner wall of the front end of the rear groove (303), and a second bevel gear (305) that cooperates with the first bevel gear (304) is provided on the inner wall of the left side of the rear groove (303); The sealing assembly includes an inner groove (401) located inside the rear left side of the air supply pipe (2). A third bevel gear (402) is provided on the inner wall of the right end of the inner groove (401), and a fourth bevel gear (403) that cooperates with the third bevel gear (402) is provided on the inner wall of the upper end of the inner groove (401).

2. A gas meter with anti-backflow function according to claim 1, characterized in that: The inner groove (401) has a sliding groove (404) on its upper side, and a screw (405) is provided inside the sliding groove (404). A sleeve plate (406) is fitted on the outer wall of the screw (405).

3. A gas meter with anti-backflow function according to claim 2, characterized in that: A limiting groove (408) is provided on the rear side of the slide (404), and a limiting plate (409) is provided on the rear side of the sleeve (406) to cooperate with the limiting groove (408).

4. A gas meter with anti-backflow function according to claim 2, characterized in that: A sealing plate (407) is provided on the front surface of the sleeve (406).

5. A gas meter with anti-backflow function according to claim 1, characterized in that: The rotation input end of the third bevel gear (402) is connected to the rotation output end of the second bevel gear (305).

6. A gas meter with anti-backflow function according to claim 2, characterized in that: The rotation input end of the screw (405) is connected to the rotation output end of the fourth bevel gear (403).

7. A gas meter with anti-backflow function according to claim 4, characterized in that: The cross-sectional dimensions of the sealing plate (407) are matched with the cross-sectional dimensions of the air supply pipe (2).

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