Diaphragm type gas meter with high sealing performance

Abstract

The utility model relates to a diaphragm gas meter with high sealing performance, which comprises a gas meter body, a gas inlet pipe fixing seat, a gas outlet pipe fixing seat, a gas inlet joint and a gas outlet joint, and has the technical key points that the lower end of the gas inlet joint is provided with a lower protruding conical opening; the lower protruding conical opening is inserted into the air inlet pipe fixing base, a lower annular passageway communicating with the air inlet side sealing groove is formed between the lower protruding conical opening and the air inlet pipe fixing base, an air inlet side sealing gasket is arranged in the air inlet side sealing groove, and an air inlet side reinforcing sealing part extending to be extruded into the lower annular passageway is arranged on the inner edge of the air inlet side sealing gasket; an upper protruding conical opening is formed in the upper end of the air outlet pipe fixing base and inserted into the air outlet connector, an upper annular passageway communicated with the air outlet side sealing groove is formed between the upper protruding conical opening and the air outlet connector, an air outlet side sealing gasket is arranged in the air outlet side sealing groove, and an air outlet side reinforcing sealing part extending to be squeezed into the upper annular passageway is arranged on the inner edge of the air outlet side sealing gasket. The meter is good in sealing performance and high in safety performance, and the phenomenon of misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meters, and particularly relates to a diaphragm gas meter with high sealing performance. Background Art

[0002] As an indispensable metering device in daily life, the safety and accuracy of a gas meter are directly related to the life and property safety and economic benefits of users. Among many performance parameters, airtightness is undoubtedly a key index to ensure the stable operation of the gas meter, and the airtightness directly depends on the sealing performance of the connection part of the meter body. Therefore, various gas meters have relatively strict requirements for the sealing structure at the connection with the gas pipeline.

[0003] For example, CN 221649648 U discloses a high-sealing ultrasonic gas meter, which includes a device body. The device body includes a gas lower shell, a gas upper shell and a sealing connector. The gas upper shell is fixed on the top of the gas lower shell. A group of sealing connectors are symmetrically installed on the top of the gas upper shell. A lower connecting pipe is provided at the bottom of the gas lower shell. The sealing connector includes a lower connecting head, an upper connecting head and a sealing nut. The upper connecting head is inserted into the lower connecting head, and the sealing nut is locked at the connection between the lower connecting head and the upper connecting head. The lower connecting head includes a sealing pipe, a fixing ring and an upper limiting ring. The fixing ring is installed on the outer side of the top of the sealing pipe, and the upper limiting ring is installed on the outer side of the bottom of the sealing pipe. A lower inner pipe is provided at the bottom of the sealing pipe and a first threaded pipe is provided at the top. A first sealing cavity is opened in the sealing pipe. A second sealing cavity is provided at the bottom of the first sealing cavity, and a third sealing cavity is provided at the bottom of the second sealing cavity. This gas meter improves the comprehensiveness of the seal at the connection between the gas meter and the gas pipeline to a certain extent. However, there are still the following problems: The lower connecting head and the upper connecting head are only connected together by a sealing nut, and the sealing nut is very easy to be screwed externally, resulting in low safety of the gas meter. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a diaphragm gas meter with reasonable structure and reliable use to solve the above problems. On the one hand, it ensures the sealing performance of the gas meter. On the other hand, it gives an alarm prompt during non-professional operation, with strong safety performance and avoiding the occurrence of misoperation.

[0005] The technical solution of the utility model is as follows:

[0006] A diaphragm gas meter with high sealing performance, comprising a gas meter body, an intake pipe fixing seat integrated with the gas meter body, an outlet pipe fixing seat, an intake joint connected to the intake pipe fixing seat, and an outlet joint connected to the outlet pipe fixing seat. The technical key points are as follows: The upper ends of the intake pipe fixing seat and the outlet pipe fixing seat are respectively provided with enlarged-diameter support discs. The upper surface of the enlarged-diameter support disc is provided with a lower annular shallow groove. The lower ends of the intake joint and the outlet joint are respectively provided with enlarged-diameter docking discs. The lower surface of the enlarged-diameter docking disc is provided with an upper annular shallow groove. The upper annular shallow groove on the intake side and the lower annular shallow groove are buckled to form an intake-side sealing groove. The lower end of the intake joint is further provided with a lower protruding conical opening communicating therewith. The lower protruding conical opening is inserted into the intake pipe fixing seat and forms a lower annular channel communicating with the intake-side sealing groove between the lower protruding conical opening and the inner wall of the intake pipe fixing seat. An intake-side sealing gasket is arranged in the intake-side sealing groove. The inner edge of the intake-side sealing gasket is provided with an intake-side enhanced sealing part extending and squeezing into the lower annular channel. The bottom surface of the intake-side enhanced sealing part is provided with a lower annular groove. The upper annular shallow groove on the outlet side and the lower annular shallow groove are buckled to form an outlet-side sealing groove. The upper end of the outlet pipe fixing seat is further provided with an upper protruding conical opening communicating therewith. The upper protruding conical opening is inserted into the outlet joint and forms an upper annular channel communicating with the outlet-side sealing groove between the upper protruding conical opening and the inner wall of the outlet joint. An outlet-side sealing gasket is arranged in the outlet-side sealing groove. The inner edge of the outlet-side sealing gasket is provided with an outlet-side enhanced sealing part extending and squeezing into the upper annular channel. The top surface of the outlet-side enhanced sealing part is provided with an upper annular groove. A pressure locking assembly is arranged between the intake pipe fixing seat and the intake joint, and a pressure locking assembly is arranged between the outlet pipe fixing seat and the outlet joint.

[0007] For the above diaphragm gas meter with high sealing performance, the pressure locking assembly includes a plurality of fixed columns fixed on the outer periphery of the intake pipe fixing seat or the outlet pipe fixing seat, a plurality of locking bolts arranged on the outer periphery of the enlarged-diameter docking disc of the intake joint or the outlet joint, a buffer spring sleeved on the locking bolt, and a pressure sensor arranged on the top surface of the fixed column. The fixed columns and the locking bolts are in one-to-one correspondence, and the screw rod of the locking bolt passes through the pressure sensor and is threadedly connected to the central screw hole of the fixed column. The buffer spring is clamped between the enlarged-diameter docking disc and the pressure sensor.

[0008] For the above diaphragm gas meter with high sealing performance, the lower surface of the enlarged-diameter docking disc is further provided with a concentric annular sealing groove corresponding to the edge of the enlarged-diameter support disc, and a sealing rubber ring is arranged in the concentric annular sealing groove.

[0009] For the above diaphragm gas meter with high sealing performance, the lower protruding conical opening is wider at the top and narrower at the bottom. The inner peripheral surface of the intake-side enhanced sealing part is a conical surface that fits against the outer wall of the lower protruding conical opening, and the outer peripheral surface is a cylindrical surface that fits against the inner wall of the intake pipe fixing seat.

[0010] For the above-mentioned diaphragm gas meter with high sealing performance, the upper protruding conical opening is narrow at the top and wide at the bottom. The inner peripheral surface of the air outlet side enhanced sealing part is a conical surface that fits against the outer wall of the upper protruding conical opening, and the outer peripheral surface is a cylindrical surface that fits against the inner wall of the air outlet joint.

[0011] For the above-mentioned diaphragm gas meter with high sealing performance, a plurality of reinforcing rib plates are provided between the enlarged diameter support disc surface and the outer wall of the inlet pipe fixing seat or the outlet pipe fixing seat.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. Gas flows through the lower protruding conical opening to the gas meter. Since the inner edge of the inlet side gasket is provided with an inlet side enhanced sealing part that extends into the lower annular channel, and the bottom surface of the inlet side enhanced sealing part is provided with a lower annular groove. When the gas intends to overflow outward from the inlet side enhanced sealing part, it enters and presses against the side wall of the lower annular groove, but makes the side wall of the lower annular groove and the side wall of the lower annular channel contact more closely, resulting in better sealing performance. Similarly, when the gas flows out of the gas meter through the upper protruding conical opening, since the inner edge of the outlet side gasket is provided with an outlet side enhanced sealing part that extends into the upper annular channel, and the top surface of the outlet side enhanced sealing part is provided with an upper annular groove. When the gas intends to overflow outward from the outlet side enhanced sealing part, it enters and presses against the side wall of the upper annular groove, but makes the side wall of the upper annular groove and the side wall of the upper annular channel contact more closely, resulting in better sealing performance, significantly improving the sealing performance of the gas meter.

[0014] 2. Since a pressure locking assembly is provided between the inlet pipe fixing seat and the inlet joint, and a pressure locking assembly is provided between the outlet pipe fixing seat and the outlet joint. When the pressure locking assembly is screwed and the connection relationship is intended to be released, the pressure sensor of the pressure locking assembly senses a decrease in pressure. Then the pressure sensor can feedback a pressure signal to give an alarm prompt during non-professional operation, and can also remind the remote staff, with strong safety performance and avoiding the occurrence of misoperation phenomena. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a partial schematic diagram of the inlet joint side of the present utility model;

[0017] Figure 3 is a partial schematic diagram of the outlet joint side of the present utility model.

[0018] In the figure: 1. Gas meter body, 2. Inlet joint, 3. Inlet pipe fixing seat, 4. Outlet joint, 5. Outlet pipe fixing seat, 6. Enlarged diameter docking disc surface, 7. Locking bolt, 8. Sealing rubber ring, 9. Inlet side gasket, 10. Lower protruding conical opening, 11. Buffer spring, 12. Pressure sensor, 13. Fixed column, 14. Reinforcing rib plate, 15. Inlet side enhanced sealing part, 16. Enlarged diameter supporting disc surface, 17. Outlet side gasket, 18. Outlet side enhanced sealing part, 19. Upper protruding conical opening. Specific implementation mode

[0019] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0020] As Figures 1 to 3 shown, the diaphragm gas meter with high sealing performance includes a gas meter body 1, an inlet pipe fixing seat 3 integrated with the gas meter body 1, an outlet pipe fixing seat 5, an inlet joint 2 connected to the inlet pipe fixing seat 3, and an outlet joint 4 connected to the outlet pipe fixing seat 5.

[0021] Among them, enlarged diameter supporting disc surfaces 16 are respectively provided at the upper ends of the inlet pipe fixing seat 3 and the outlet pipe fixing seat 5. A lower annular shallow groove is provided on the upper surface of the enlarged diameter supporting disc surface 16. Enlarged diameter docking disc surfaces 6 are respectively provided at the lower ends of the inlet joint 2 and the outlet joint 4. An upper annular shallow groove is provided on the lower surface of the enlarged diameter docking disc surface 6.

[0022] The upper annular shallow groove on the inlet side and the lower annular shallow groove are buckled to form an inlet side sealing groove. The lower end of the inlet joint 2 is further provided with a lower protruding conical opening 10 communicating with it. The lower protruding conical opening 10 is inserted into the inlet pipe fixing seat 3 and a lower annular channel communicating with the inlet side sealing groove is formed between the lower protruding conical opening 10 and the inner wall of the inlet pipe fixing seat 3. An inlet side gasket 9 is provided in the inlet side sealing groove. An inlet side enhanced sealing part 15 extending and squeezing into the lower annular channel is provided on the inner edge of the inlet side gasket 9. A lower annular groove is provided on the bottom surface of the inlet side enhanced sealing part 15. The lower protruding conical opening 10 is wider at the top and narrower at the bottom. The inner peripheral surface of the inlet side enhanced sealing part 15 is a conical surface attached to the outer wall of the lower protruding conical opening 10, and the outer peripheral surface is a cylindrical surface attached to the inner wall of the inlet pipe fixing seat 3.

[0023] The upper annular shallow groove and the lower annular shallow groove on the air outlet side are buckled to form an air outlet side sealing groove. Another upper protruding conical port 19 communicating with the upper end of the air outlet pipe fixing seat 5 is provided. The upper protruding conical port 19 is inserted into the air outlet joint 4, and an upper annular channel communicating with the air outlet side sealing groove is formed between the upper protruding conical port 19 and the inner wall of the air outlet joint 4. An air outlet side gasket 17 is arranged in the air outlet side sealing groove. An air outlet side enhanced sealing portion 18 extending and squeezing into the upper annular channel is arranged on the inner edge of the air outlet side gasket 17. An upper annular groove is arranged on the top surface of the air outlet side enhanced sealing portion 18. The upper protruding conical port 19 is narrow at the top and wide at the bottom. The inner peripheral surface of the air outlet side enhanced sealing portion 18 is a conical surface attached to the outer wall of the upper protruding conical port 19, and the outer peripheral surface is a cylindrical surface attached to the inner wall of the air outlet joint 4.

[0024] In this embodiment, a concentric annular sealing groove is further provided on the lower surface of the diameter-expanded docking disk surface 6 corresponding to the edge of the diameter-expanded supporting disk surface 16. A sealing rubber ring 8 is arranged in the concentric annular sealing groove to further ensure the sealing performance. A plurality of reinforcing rib plates 14 are arranged between the outer walls of the diameter-expanded supporting disk surface 16 and the air inlet pipe fixing seat 3 or the air outlet pipe fixing seat 5.

[0025] A pressure locking assembly is arranged between the air inlet pipe fixing seat 3 and the air inlet joint 2, and a pressure locking assembly is arranged between the air outlet pipe fixing seat 5 and the air outlet joint 4. In this embodiment, the pressure locking assembly includes a plurality of fixed columns 13 fixed on the outer periphery of the air inlet pipe fixing seat 3 or the air outlet pipe fixing seat 5, a plurality of locking bolts 7 arranged on the outer periphery of the diameter-expanded docking disk surface 6 of the air inlet joint 2 or the air outlet joint 4, a buffer spring 11 sleeved on the locking bolts 7, and a pressure sensor 12 arranged on the top surface of the fixed column 13. The fixed columns 13 correspond to the locking bolts 7 one by one, and the screw rod of the locking bolt 7 passes through the pressure sensor 12 and is in threaded connection with the central screw hole of the fixed column 13. The buffer spring 11 is clamped between the diameter-expanded docking disk surface 6 and the pressure sensor 12.

[0026] Working principle:

[0027] During use, by using the threaded connection between each locking bolt 7 and the central screw hole of the fixed column 13, after screwing in place to achieve the pressing in place, the buffer spring 11 applies pressure to the pressure sensor 12 to reach the set numerical range. At the same time, the buffer spring 11 also plays a role in preventing the locking bolt 7 from loosening. When the pressure signal fed back by the pressure sensor 12 is lower than the numerical range, it indicates that the locking bolt 7 has loosened, which can remind the staff to check, and the safety performance is better.

[0028] During the use of the gas meter, when gas is about to overflow outward through the inlet-side enhanced sealing portion 15 and the outlet-side enhanced sealing portion 18, it will enter and press down the annular groove and the side wall of the upper annular groove, but make the side wall of the lower annular groove and the side wall of the lower annular channel contact more closely, and the side wall of the upper annular groove and the side wall of the upper annular channel contact more closely, resulting in better sealing performance.

[0029] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope covered by the present invention.

Claims

1. A highly sealed diaphragm gas meter, comprising a gas meter body, an air inlet pipe fixing seat integrated with the gas meter body, an air outlet pipe fixing seat, an air inlet joint connected to the air inlet pipe fixing seat, and an air outlet joint connected to the air outlet pipe fixing seat, characterized in that: The upper ends of the air inlet pipe fixing seat and the air outlet pipe fixing seat are respectively provided with an expanded diameter support disk surface, the upper surface of the expanded diameter support disk surface is provided with a lower annular shallow groove, the lower ends of the air inlet joint and the air outlet joint are respectively provided with an expanded diameter docking disk surface, the lower surface of the expanded diameter docking disk surface is provided with an upper annular shallow groove; the upper annular shallow groove and the lower annular shallow groove on the air inlet side are buckled to form an air inlet side sealing groove, and the lower end of the air inlet joint is further provided with a lower protruding conical opening connected thereto, the lower protruding conical opening is inserted into the air inlet pipe fixing seat and forms a lower annular channel connected to the air inlet side sealing groove with the inner wall of the air inlet pipe fixing seat, an air inlet side sealing gasket is provided in the air inlet side sealing groove, and the inner edge of the air inlet side sealing gasket is provided with an air inlet side reinforcing gasket extending and squeezed into the lower annular channel The sealing part, the bottom surface of the air inlet side reinforced sealing part is provided with a lower annular groove; the upper annular shallow groove on the air outlet side is buckled with the lower annular shallow groove to form an air outlet side sealing groove, the upper end of the air outlet pipe fixing seat is further provided with an upper protruding conical opening connected therewith, the upper protruding conical opening is inserted into the air outlet joint and forms an upper annular channel connected with the air outlet side sealing groove between the upper protruding conical opening and the inner wall of the air outlet joint, an air outlet side sealing gasket is provided in the air outlet side sealing groove, the inner edge of the air outlet side sealing gasket is provided with an air outlet side reinforced sealing part extending into the upper annular channel, and the top surface of the air outlet side reinforced sealing part is provided with an upper annular groove; a pressure locking assembly is provided between the air inlet pipe fixing seat and the air inlet joint, and a pressure locking assembly is provided between the air outlet pipe fixing seat and the air outlet joint.

2. The high-sealing diaphragm gas meter according to claim 1, characterized in that: The pressure locking assembly includes a plurality of fixing columns fixed to the outer periphery of an intake pipe fixing seat or an outlet pipe fixing seat, a plurality of locking bolts arranged on the outer periphery of an expanded diameter docking disk surface of an intake joint or an outlet joint, a buffer spring sleeved on the locking bolts, and a pressure sensor arranged on the top surface of the fixing column. The fixing columns correspond to the locking bolts one by one, and the screw of the locking bolt passes through the center screw hole of the pressure sensor and is threadedly connected to the fixing column. The buffer spring is clamped between the expanded diameter docking disk surface and the pressure sensor.

3. The high-sealing diaphragm gas meter according to claim 1, characterized in that: A concentric annular sealing groove is further provided on the lower surface of the expanded diameter docking disk surface corresponding to the edge of the expanded diameter supporting disk surface, and a sealing rubber ring is provided in the concentric annular sealing groove.

4. The high-sealing diaphragm gas meter according to claim 1, characterized in that: The lower protruding conical opening is wide at the top and narrow at the bottom. The inner peripheral surface of the air intake side reinforced sealing portion is a conical surface in contact with the outer wall of the lower protruding conical opening, and the outer peripheral surface is a cylindrical surface in contact with the inner wall of the air intake pipe fixing seat.

5. The high-sealing diaphragm gas meter according to claim 1, characterized in that: The upper protruding conical opening is narrow at the top and wide at the bottom, the inner peripheral surface of the outlet side reinforced sealing portion is a conical surface in contact with the outer wall of the upper protruding conical opening, and the outer peripheral surface is a cylindrical surface in contact with the inner wall of the outlet joint.

6. The high-sealing diaphragm gas meter according to claim 1, characterized in that: A plurality of reinforcing rib plates are arranged between the expanded diameter support disc surface and the outer wall of the air inlet pipe fixing seat or the air outlet pipe fixing seat.

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