An ultrasonic gas meter module testing tool

Abstract

The present application relates to the technical field of flow measurement, and provides an ultrasonic gas meter module test tool, including a mounting seat and a connecting seat, a mounting cavity for installing the gas meter module is formed between the mounting seat and the connecting seat, and the side walls of the connecting seat away from the mounting seat are respectively provided with an input port and an output port connected to the mounting cavity, the air inlet end of the gas meter module is connected to the mounting cavity, and the air outlet end of the gas meter module is connected to the output port of the connecting seat; a sealing ring is provided between the mounting seat and the connecting seat, and the seal is arranged in an annular shape around the mounting cavity, a connecting piece is provided between the mounting seat and the connecting seat, and the mounting seat and the connecting seat are detachably connected through the connecting piece. An ultrasonic gas meter module test tool of the present application can detect the metering accuracy of the gas meter module and reduce the possibility of damage to the gas meter casing.

Description

Technical Field

[0001] The present application relates to the technical field of flow measurement, and in particular to an ultrasonic gas meter module testing tool. Background Art

[0002] Ultrasonic gas meter is a meter that uses ultrasonic technology to measure gas flow. It calculates the gas flow rate by the speed and time difference of ultrasonic waves propagating in the gas. It has the advantages of high measurement accuracy, good stability, and fast response speed. The gas meter module is an important part of the gas meter, mainly involving the metering and data processing functions of the gas meter. The use of the metering module for gas metering can achieve accurate measurement and monitoring of gas.

[0003] Reference Figure 1 In the existing ultrasonic gas meter, the gas meter module 3 has a metering flow channel for gas to pass through. The metering module is arranged in the metering flow channel to calculate the amount of gas flowing through. The two ends of the gas meter module 3 respectively form an inlet end 31 and an outlet end 32 connected to the metering flow channel. The inlet end 31 of the gas meter module 3 is used to connect to the input port of the gas meter housing, and the outlet end 32 of the gas meter module 3 is used to connect to the output port of the gas meter housing. When testing the metering accuracy of the metering module, the usual method is to use a testing device to pass a certain flow of gas into the input port of the housing. The gas enters the metering flow channel from the input port of the housing and the inlet end 31 of the gas meter module 3 in turn, and then is discharged outward from the outlet end 32 of the gas meter module 3 and the output port of the housing in turn. When the gas passes through the metering flow channel, the metering module can measure the gas. The gas flow recorded by the metering module is compared with the actual gas flow introduced, so that the metering accuracy of the metering module can be tested.

[0004] However, the outer shell of the gas meter is usually connected by an upper and lower shell through a snap-fit ​​form, which makes the outer shell of the gas meter fail to meet the air tightness required for flow testing. In addition, the outer shell of the gas meter and the gas meter module are generally made of plastic, which makes it easy to cause damage to the outer shell of the gas meter when a certain flow of high-pressure gas is passed, so further improvement is needed. Summary of the invention

[0005] In order to detect the metering accuracy of the gas meter module and reduce the possibility of damage to the gas meter casing, the present application provides an ultrasonic gas meter module testing tool.

[0006] The ultrasonic gas meter module test fixture provided in this application adopts the following technical solution:

[0007] An ultrasonic gas meter module testing tool comprises a mounting seat and a connecting seat, wherein an installation cavity for installing the gas meter module is formed between the mounting seat and the connecting seat, and the side walls of the connecting seat away from the mounting seat are respectively provided with an input port and an output port connected to the mounting cavity, the air inlet end of the gas meter module is connected to the mounting cavity, and the air outlet end of the gas meter module is connected to the output port of the connecting seat; a sealing ring is provided between the mounting seat and the connecting seat, and the sealing ring is arranged in a ring shape around the mounting cavity; a connecting piece is provided between the mounting seat and the connecting seat, and the mounting seat and the connecting seat are detachably connected through the connecting piece.

[0008] By adopting the above-mentioned technical scheme, the gas meter module in the gas meter is installed in the installation cavity formed between the installation seat and the connecting seat through the setting of the installation seat and the connecting seat, and then a certain flow rate of gas is introduced into the installation cavity through the input port of the connecting seat. The gas enters the metering flow channel from the installation cavity and the air inlet end of the gas meter module in turn, and is then discharged outward from the air outlet end of the gas meter module and the output port of the connecting seat in turn. When the gas passes through the metering flow channel, the metering module can measure the gas, and the gas flow recorded by the metering module is compared with the actual gas flow introduced, so as to detect the metering accuracy of the metering module; the setting of the sealing ring improves the airtightness of the installation cavity, thereby improving the accuracy of metering detection; the combination of the mounting seat and the connecting seat provides a closed detection space for the gas meter module to replace the outer casing of the gas meter, thereby reducing the possibility of damage to the outer casing of the gas meter due to pressure.

[0009] Optionally, the mounting seat is provided with a plurality of positioning columns located in the mounting cavity, and the outer wall of the gas meter module is provided with a plurality of positioning rings for the positioning columns to be inserted, and the plurality of positioning rings are arranged corresponding to the plurality of positioning columns. When the positioning columns are inserted in the corresponding positioning rings and the mounting seat and the connecting seat are connected, the gas outlet end of the gas meter module is connected to the output port of the connecting seat.

[0010] By adopting the above-mentioned technical solution and setting the positioning column and the positioning ring, when the gas meter module is installed, the positioning ring of the gas meter module is aligned with the positioning column and pushed, and the multiple positioning columns can limit the position of the gas meter module, so that the gas meter module is connected to the mounting seat, and when the connecting seat is installed on the mounting seat, the gas outlet end of the gas meter module can be connected to the output port of the connecting seat, thereby improving the convenience of disassembly and assembly of the gas meter module.

[0011] Optionally, a support ring is provided on the outer peripheral wall of the gas outlet end of the gas meter module, and the mounting seat is provided with a supporting ring located in the mounting cavity, one end of the supporting ring is connected to the inner wall of the mounting seat, and the other end is used to support the supporting ring, and the end face of the supporting ring close to the connecting seat is provided with an avoidance notch for avoiding the gas meter module.

[0012] By adopting the above-mentioned technical solution, through the setting of the support ring and the bearing ring, the gas meter module is placed in the mounting seat and the bearing ring supports the support ring, thereby supporting the gas outlet end of the gas meter module, reducing the possibility of deformation of the gas meter module caused by the downward pressure of the connecting seat when the connecting seat is installed on the mounting seat, thereby reducing the possibility of damage to the gas meter module during the installation process.

[0013] Optionally, the connecting seat is provided with a docking ring located in the installation cavity, one end of the docking ring is connected to the inner wall of the connecting seat and communicated with the output port of the connecting seat, and the end of the docking ring close to the installation seat is inserted into the gas outlet end of the gas meter module; the connecting seat is provided with a clamping mechanism, and the clamping mechanism is used to clamp the outer peripheral wall of the gas outlet end of the gas meter module.

[0014] By adopting the above-mentioned technical scheme and setting up the clamping mechanism, after the connecting seat is installed on the mounting seat, one end of the docking ring close to the mounting seat is inserted into the gas outlet end of the gas meter module, and the clamping mechanism clamps the outer peripheral wall of the gas outlet end of the gas meter module, thereby improving the connection stability between the gas outlet end of the gas meter module and the output port of the connecting seat, and reducing the possibility that the gas outlet end of the gas meter module will be separated from the output port of the connecting seat when a certain pressure of gas is rushed into the mounting cavity; in addition, the clamping mechanism clamps the outer peripheral wall of the gas outlet end of the gas meter module, thereby improving the air tightness between the gas outlet end and the output port of the gas meter module, thereby improving the detection accuracy.

[0015] Optionally, the clamping mechanism includes a clamping ring, a rocker arm and a driving assembly, the clamping ring is coaxially sleeved on the outer peripheral side of the docking ring, and a plurality of rocker arms are spaced apart around the central axis of the docking ring, one end of each rocker arm is hinged to the inner wall of the connecting seat, and the free end of each rocker arm is connected to the clamping ring; the clamping ring is elastically arranged, and a plug-in channel for inserting the gas outlet end of the gas meter module is formed between the clamping ring and the docking ring; the driving assembly is arranged between the docking ring and the rocker arm, and when the gas outlet end of the gas meter module is inserted into the plug-in channel, the driving assembly drives the rocker arm to swing so that the clamping ring is clamped to the outer peripheral wall of the gas outlet end of the gas meter module.

[0016] By adopting the above-mentioned technical scheme, through the setting of the clamping ring, the rocker arm and the driving assembly, the driving assembly forces the free ends of all the rocker arms to swing away from the center of the docking ring, and multiple rocker arms can open the clamping ring to expand the plug-in channel so that the gas outlet end of the gas meter module can be inserted into the plug-in channel; when the gas outlet end of the gas meter module is inserted into the plug-in channel, the driving assembly can drive the rocker arm to swing again, so that the clamping ring is tightly clamped to the outer peripheral wall of the gas outlet end of the gas meter module, thereby improving the air tightness between the gas outlet end and the output port of the gas meter module, thereby improving the detection accuracy.

[0017] Optionally, a rotating shaft is provided at one end of the rocker arm away from the clamping ring, the rotating shaft is rotatably connected to the inner wall of the connecting seat, and the rocker arm is hinged to the connecting seat through the rotating shaft; the driving assembly includes a driving ring, a return spring and a linkage member, the driving ring is slidably sleeved on the outer peripheral wall of the docking ring, the return spring is arranged between the driving ring and the inner wall of the connecting seat, and the return spring normally causes the driving ring to move to the side of the plug-in channel close to the mounting seat for the gas outlet end of the gas meter module to push; the linkage member is arranged between the driving ring and the rotating shaft, and when the gas outlet end of the gas meter module pushes the driving ring to move, the linkage member drives the rotating shaft to rotate to force the rocker arm to swing.

[0018] By adopting the above-mentioned technical scheme, through the setting of the driving ring, the reset spring and the linkage, the setting of the reset spring enables the driving ring to be normally located on the side of the plug-in channel close to the mounting seat, so that when the gas outlet end of the gas meter module is inserted into the plug-in channel, the gas outlet end of the gas meter module can push the driving ring, that is, force the driving ring to move to the side away from the mounting seat. At this time, the rocker arm can swing under the action of the linkage, so that the clamping ring clamps the outer peripheral wall of the gas outlet end of the gas meter module, thereby improving the operational convenience of the overall structure.

[0019] Optionally, the linkage includes a first gear and a first rack, the first gear is coaxially connected to the rotating shaft, the first rack is connected to the drive ring, and the first gear and the second rack are meshingly transmitted; when the drive ring is displaced to the side of the plug-in channel close to the mounting seat, the clamping ring expands to allow the outlet end of the gas meter module to be inserted into the plug-in channel, and when the outlet end of the gas meter module pushes the drive ring to displace toward the side away from the mounting seat, the clamping ring restores its shape and clamps to the outer peripheral wall of the outlet end of the gas meter module.

[0020] By adopting the above-mentioned technical scheme, through the setting of the first gear and the first rack, the driving ring is normally displaced to the side of the plug-in channel close to the mounting seat under the action of the reset spring. At this time, the free end of the rocker arm swings away from the center of the docking ring, thereby opening the clamping ring and expanding the plug-in channel to facilitate the insertion of the gas outlet end of the gas meter module. After the gas outlet end of the gas meter module is inserted into the plug-in channel, it pushes the driving ring, thereby driving the first gear and the first rack to engage and transmit, so as to drive the rocker arm to swing, forcing the free end of the rocker arm to swing toward the center of the docking ring. At this time, the clamping ring recovers its deformation under the action of its own elasticity, thereby clamping to the outer peripheral wall of the gas outlet end of the gas meter module, greatly improving the operational convenience of the overall structure.

[0021] Optionally, the linkage includes a second gear, a second rack and a third rack, the second gear is coaxially connected to the rotating shaft, a mounting bracket is provided on the end face of the drive ring away from the mounting seat, the second rack and the third rack are both arranged on the mounting bracket, the second rack is located on the side of the third rack away from the drive ring, the rotation direction of the second rack driving the second gear to rotate is opposite to the rotation direction of the third rack driving the second gear to rotate; the second rack is normally engaged with the second gear for transmission, and when the outlet end of the gas meter module pushes the drive ring to move toward the side away from the mounting seat, the clamping ring expands to allow the outlet end of the gas meter module to be inserted into the plug-in channel.

[0022] By adopting the above-mentioned technical scheme, through the second gear, the second rack and the third rack, the driving ring is normally displaced to the side of the plug-in channel close to the mounting seat under the action of the reset spring, and when the air outlet of the gas meter module pushes the driving ring, the second rack is meshed with the second gear, thereby forcing the free end of the rocker arm to swing away from the center of the docking ring and open the clamping ring to expand the plug-in channel so that the air outlet of the gas meter module can enter; continue to drive the air outlet of the gas meter module to continuously enter the plug-in channel, so that the second rack disengages from the second gear and the third rack meshes with the second gear, thereby causing the rocker arm to reverse, that is, forcing the free end of the rocker arm to swing toward the center close to the docking ring, and at this time the clamping ring recovers its deformation under the action of its own elasticity, thereby clamping to the outer peripheral wall of the air outlet end of the gas meter module. As a result, the insertion of the gas outlet end of the gas meter module is formed into two stages. The first stage is used to force the clamping ring to expand, and the second stage is used to force the clamping ring to contract and tighten, so that when the connecting seat and the mounting seat are separated, the clamping ring is in a contracted state, reducing the possibility of the clamping ring being in an expanded state for a long time and causing irreversible deformation.

[0023] Optionally, when the free end of the swing rod swings toward the center of the docking ring, the clamping ring restores its shape and simultaneously clamps to the outer peripheral wall of the gas outlet end of the gas meter module and the outer peripheral wall of the driving ring.

[0024] By adopting the above-mentioned technical solution, when the clamping ring restores its shape (that is, the free ends of all the rocker arms swing toward the side close to the center of the docking ring), the clamping ring can simultaneously clamp the outer peripheral wall of the gas outlet end of the gas meter module and the outer peripheral wall of the driving ring, so as to improve the air tightness between the outer peripheral wall of the gas outlet end of the gas meter module and the output port of the connecting seat, reduce the possibility of gas in the installation cavity leaking from the gap between the gas outlet end of the gas meter module and the output port of the connecting seat, and thereby improve the detection accuracy.

[0025] Optionally, the outer wall of the docking ring is provided with an embedded ring groove, and a sealing ring is embedded in the embedded ring groove; the connecting seat is provided with a clamping assembly, and when the clamping ring is clamped against the outer wall of the gas outlet end of the gas meter module, the clamping assembly forces the outer wall of the sealing ring to be pressed against the inner wall of the gas outlet end of the gas meter module.

[0026] By adopting the above-mentioned technical solution, through the setting of the sealing ring, after the clamping ring is tightly clamped to the outer peripheral wall of the gas outlet end of the gas meter module, the clamping component forces the outer peripheral wall of the sealing ring to be pressed against the inner peripheral wall of the gas outlet end of the gas meter module, so that the combination of the clamping ring and the sealing ring can clamp and fix the gas outlet end of the gas meter module and improve the airtightness between the gas outlet end of the gas meter module and the docking ring.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Through the setting of the mounting seat and the connecting seat, the gas meter module in the gas meter is installed in the mounting cavity formed between the mounting seat and the connecting seat, and then a certain flow of gas is introduced into the mounting cavity through the input port of the connecting seat. The gas enters the metering flow channel from the mounting cavity and the gas inlet end of the gas meter module in turn, and is then discharged outward from the gas outlet end of the gas meter module and the output port of the connecting seat in turn. When the gas passes through the metering flow channel, the metering module can measure the gas, and the gas flow recorded by the metering module is compared with the actual gas flow introduced, so as to detect the metering accuracy of the metering module; the setting of the sealing ring improves the airtightness of the mounting cavity, thereby improving the accuracy of metering detection; the combination of the mounting seat and the connecting seat provides a closed detection space for the gas meter module to replace the outer shell of the gas meter, thereby reducing the possibility of damage to the outer shell of the gas meter due to pressure;

[0029] 2. Through the second gear, the second rack and the third rack, the driving ring is normally displaced to the side of the plug-in channel close to the mounting seat under the action of the reset spring. When the air outlet of the gas meter module pushes the driving ring, the second rack is meshed with the second gear, thereby forcing the free end of the swing arm to swing away from the center of the docking ring and open the clamping ring to expand the plug-in channel so that the air outlet of the gas meter module can enter; continue to drive the air outlet of the gas meter module to continuously enter the plug-in channel, so that the second rack disengages from the second gear and the third rack meshes with the second gear, thereby causing the swing arm to reverse, that is, forcing the free end of the swing arm to swing toward the center of the docking ring. At this time, the clamping ring recovers its deformation under the action of its own elasticity, thereby clamping to the outer peripheral wall of the air outlet end of the gas meter module. As a result, the insertion of the gas outlet end of the gas meter module is formed into two stages. The first stage is used to force the clamping ring to expand, and the second stage is used to force the clamping ring to shrink and tighten, so that when the connecting seat and the mounting seat are separated, the clamping ring is in a contracted state, reducing the possibility of irreversible deformation of the clamping ring due to being in an expanded state for a long time;

[0030] 3. Through the setting of the sealing ring, after the clamping ring is tightly clamped to the outer peripheral wall of the gas outlet end of the gas meter module, the clamping component forces the outer peripheral wall of the sealing ring to be tightly pressed against the inner peripheral wall of the gas outlet end of the gas meter module, so that the combination of the clamping ring and the sealing ring can clamp and fix the gas outlet end of the gas meter module and improve the air tightness between the gas outlet end of the gas meter module and the docking ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a gas meter module in the background technology;

[0032] Figure 2 is a schematic diagram of the overall structure of Example 1;

[0033] Figure 3 is an exploded schematic diagram of a sealing ring embodied in Embodiment 1;

[0034] Figure 4 is a schematic diagram of the structure of the positioning column embodied in Example 1;

[0035] Figure 5 is a partial cross-sectional view of the docking ring of embodiment 1;

[0036] Figure 6 is an exploded schematic diagram of a support ring according to Embodiment 2;

[0037] Figure 7 is a partial cross-sectional view of the clamping mechanism of embodiment 2;

[0038] Figure 8 is a partial cross-sectional view of the second embodiment showing the clamping ring in an open state;

[0039] Fig. 9 is a partial cross-sectional view of the second embodiment showing the tightening ring in a contracted state;

[0040] Fig.10 is a partial cross-sectional view of a linkage member according to Embodiment 3;

[0041] Fig.11 is a partial cross-sectional view of embodiment 3 showing the meshing of the second rack and the second gear;

[0042] Fig.12 is a partial cross-sectional view of the third embodiment showing the clamping ring in an open state;

[0043] Fig.13 is a partial cross-sectional view of the gas outlet end of the gas meter module embodying the clamping ring in embodiment 3;

[0044] Fig.14 It is a partial cross-sectional view of the clamping assembly according to embodiment 4.

[0045] Description of reference numerals: 1. Mounting seat; 11. Sealing ring; 12. Positioning column; 13. Supporting ring; 131. Avoidance gap; 14. Groove; 2. Connecting seat; 21. Input port; 22. Output port; 23. Docking ring; 231. Embedded ring groove; 232. Sealing ring; 24. Connecting bolt; 3. Gas meter module; 31. Inlet end; 32. Outlet end; 33. Positioning ring; 34. Support ring; 4. Clamping machine Structure; 41. Clamping ring; 411. Plug-in channel; 412. Plug-in hole; 42. Rocker; 421. Rotating shaft; 43. Driving ring; 431. Mounting frame; 44. Return spring; 45. Linkage; 451. First gear; 452. First rack; 453. Second gear; 454. Second rack; 455. Third rack; 5. Clamping assembly; 51. Airbag; 52. Clamping ring plate; 53. Pushing strip. DETAILED DESCRIPTION

[0046] The following is combined with Figure 2 -Attached Fig.14 This application is described in further detail. Example 1

[0047] An embodiment of the present application discloses an ultrasonic gas meter module testing tool.

[0048] Reference Figure 2 , Figure 3 An ultrasonic gas meter module testing tool comprises a mounting seat 1 and a connecting seat 2. The side walls of the mounting seat 1 and the connecting seat 2 close to each other are provided with grooves 14. When the connecting seat 2 is attached to the mounting seat 1, the grooves 14 of the mounting seat 1 and the grooves 14 of the connecting seat 2 are combined to form an installation cavity, and the gas meter module 3 is installed in the installation cavity; the side walls of the connecting seat 2 away from the mounting seat 1 are respectively provided with an input port 21 and an output port 22, and the input port 21 of the connecting seat 2 and the output port 22 of the connecting seat 2 are both connected to the installation cavity.

[0049] Reference Figure 2 , Figure 3 A plurality of first connection holes are provided on the side wall of the connecting seat 2, and a plurality of second connection holes are provided on the side wall of the mounting seat 1, and the plurality of first connection holes and the plurality of second connection holes are arranged correspondingly; a connecting member is provided between the mounting seat 1 and the connecting seat 2, and the connecting member includes a plurality of connection bolts 24, and the plurality of connection bolts 24 are arranged correspondingly to the plurality of first connection holes, and the connection bolts 24 are sequentially passed through the corresponding first connection holes and the second connection holes and are threadedly connected with the second connection holes, and the mounting seat 1 and the connecting seat 2 are detachably connected by the plurality of connection bolts 24.

[0050] Reference Figure 3 , Figure 4A plurality of positioning posts 12 are fixedly mounted on the inner wall of the groove 14 of the mounting seat 1, and a plurality of positioning rings 33 for the positioning posts 12 to be inserted are fixedly mounted on the outer wall of the gas meter module 3. The plurality of positioning rings 33 are arranged corresponding to the plurality of positioning posts 12. When the positioning posts 12 are inserted into the corresponding positioning rings 33 and the mounting seat 1 and the connecting seat 2 are connected, the air inlet end 31 of the gas meter module 3 is connected to the mounting cavity, and the air outlet end 32 of the gas meter module 3 is connected to the output port 22 of the connecting seat 2. A sealing groove is provided on the side wall of the mounting seat 1 close to the connecting seat 2. The sealing groove is arranged in a ring shape around the outer side of the mounting cavity, and a sealing ring 11 is embedded in the sealing groove.

[0051] Reference Figure 5 A docking ring 23 is installed in the groove 14 of the connecting seat 2. The docking ring 23 is a circular tubular structure. One end of the docking ring 23 is fixedly connected to the inner wall of the groove 14 of the connecting seat 2, and the docking ring 23 is connected to the output port 22 of the connecting seat 2; when the mounting seat 1 and the connecting seat 2 are connected, the end of the docking ring 23 close to the mounting seat 1 is inserted into the gas outlet end 32 of the gas meter module 3.

[0052] The implementation principle of Example 1 of the present application is as follows: the gas meter module 3 in the gas meter is installed in the installation cavity formed between the installation seat 1 and the connecting seat 2, and then a certain flow of gas is introduced into the installation cavity through the input port 21 of the connecting seat 2. The gas enters the metering flow channel from the installation cavity and the air inlet end 31 of the gas meter module 3 in turn, and is then discharged outward from the air outlet end 32 of the gas meter module 3 and the output port 22 of the connecting seat 2 in turn. When the gas passes through the metering flow channel, the metering module can meter the gas, and the gas flow recorded by the metering module is compared with the actual gas flow introduced, so as to detect the metering accuracy of the metering module; the setting of the sealing ring 11 improves the airtightness of the installation cavity, thereby improving the accuracy of metering detection; the combination of the mounting seat 1 and the connecting seat 2 provides a closed detection space for the gas meter module 3 to replace the outer casing of the gas meter, thereby reducing the possibility of damage to the outer casing of the gas meter due to pressure. Example 2

[0053] An embodiment of the present application discloses an ultrasonic gas meter module testing tool.

[0054] Reference Figure 6 The difference between the ultrasonic gas meter module test tool disclosed in the embodiment of the present application and the embodiment 1 is that:

[0055] In this embodiment, a support ring 34 is fixedly installed on the outer peripheral wall of the gas outlet end 32 of the gas meter module 3, and a supporting ring 13 is installed in the groove 14 of the mounting seat 1. One end of the supporting ring 13 is fixedly connected to the inner wall of the groove 14 of the mounting seat 1, and one end of the supporting ring 13 close to the connecting seat 2 is used to support the supporting ring 34. The end face of the supporting ring 13 close to the connecting seat 2 is provided with an avoidance notch 131 for avoiding the gas meter module 3.

[0056] Reference Figure 7 , Figure 8 A clamping mechanism 4 is arranged in the groove 14 of the connecting seat 2, and the clamping mechanism 4 is used to clamp the outer peripheral wall of the gas outlet end 32 of the gas meter module 3; the clamping mechanism 4 includes a clamping ring 41, a rocker rod 42 and a driving assembly, the clamping ring 41 is coaxially sleeved on the outer peripheral side of the docking ring 23, the clamping ring 41 is elastically arranged, and in this embodiment, the clamping ring 41 is made of rubber; a plurality of rocker rods 42 are arranged, and the plurality of rocker rods 42 are arranged at intervals around the central axis of the docking ring 23, and one end of each rocker rod 42 is fixedly connected to a rotating shaft 421, and the rotating shaft 421 is rotatably connected to the inner wall of the groove 14 of the connecting seat 2, and one end of the rocker rod 42 is hinged to the connecting seat 2 through the rotating shaft 421.

[0057] For the convenience of description, the end of the rocker arm 42 away from the rotating shaft 421 is defined as the free end of the rocker arm 42. The end face of the clamping ring 41 is provided with a plurality of plug holes 412. The plurality of plug holes 412 are arranged corresponding to the plurality of rocker arms 42. The free end of each rocker arm 42 is inserted into the corresponding plug hole 412. The free end of the rocker arm 42 is fixedly connected to the inner wall of the plug hole 412 by bonding.

[0058] Reference Figure 8 , Fig. 9 The inner diameter of the clamping ring 41 is larger than the outer diameter of the docking ring 23, and a plug-in channel 411 for inserting the gas outlet end 32 of the gas meter module 3 is formed between the clamping ring 41 and the docking ring 23; the driving component is arranged between the docking ring 23 and the rocker arm 42, and when the gas outlet end 32 of the gas meter module 3 is inserted into the plug-in channel 411, the driving component drives the rocker arm 42 to swing, so that the clamping ring 41 is tightly clamped to the outer peripheral wall of the gas outlet end 32 of the gas meter module 3.

[0059] Reference Figure 7 , Figure 8 , Fig. 9 The driving assembly includes a driving ring 43, a return spring 44 and a linkage member 45. The driving ring 43 is slidably sleeved on the outer peripheral wall of the docking ring 23, and the inner diameter of the driving ring 43 is adapted to the outer diameter of the docking ring 23; a plurality of return springs 44 are provided and are arranged at intervals around the central axis of the docking ring 23, one end of the return spring 44 is fixedly connected to the inner wall of the groove 14 of the connecting seat 2, and the other end is fixedly connected to the driving ring 43. The return spring 44 normally causes the driving ring 43 to move to the side of the plug-in channel 411 close to the mounting seat 1, so as to be pushed by the gas outlet end 32 of the gas meter module 3.

[0060] Reference Figure 8 , Fig. 9The linkage member 45 is arranged between the driving ring 43 and the rotating shaft 421. When the gas outlet end 32 of the gas meter module 3 pushes the driving ring 43 to move, the linkage member 45 drives the rotating shaft 421 to rotate to force the rocker arm 42 to swing. The number of linkage members 45 is set corresponding to the number of rocker arms 42. In this embodiment, the linkage member 45 includes a first gear 451 and a first rack 452. The first gear 451 is coaxially fixed to the outer peripheral wall of the rotating shaft 421, and one end of the first rack 452 is fixedly connected to the end face of the driving ring 43 away from the mounting seat 1. The two ends of the first rack 452 are extended along the central axis of the docking ring 23, and the first gear 451 and the first rack 452 are meshed for transmission.

[0061] When the driving ring 43 moves to the side of the plug-in channel 411 close to the mounting base 1, the free end of the rocker arm 42 swings toward the center away from the docking ring 23, causing the clamping ring 41 to expand so that the outlet end 32 of the gas meter module 3 can be inserted into the plug-in channel 411; when the outlet end 32 of the gas meter module 3 pushes the driving ring 43 to move toward the side away from the mounting base 1, the free end of the rocker arm 42 swings toward the center close to the docking ring 23, causing the clamping ring 41 to restore its shape and clamp to the outer peripheral wall of the outlet end 32 of the gas meter module 3.

[0062] Reference Fig. 9 It should be noted that, in this embodiment, when the free end of the rocker arm 42 swings toward the center of the docking ring 23, the clamping ring 41 restores its shape and simultaneously clamps to the outer peripheral wall of the gas outlet end 32 of the gas meter module 3 and the outer peripheral wall of the driving ring 43.

[0063] The implementation principle of Example 2 of the present application is as follows: the driving ring 43 is normally displaced to the side of the plug-in channel 411 close to the mounting seat 1 under the action of the reset spring 44. At this time, the free end of the rocker arm 42 swings toward the center away from the docking ring 23, thereby opening the clamping ring 41 and expanding the plug-in channel 411 to facilitate the insertion of the gas outlet end 32 of the gas meter module 3. After the gas outlet end 32 of the gas meter module 3 is inserted into the plug-in channel 411, the driving ring 43 is pushed, thereby driving the first gear 451 and the first rack 452 to engage and transmit, so as to drive the rocker arm 42 to swing, forcing the free end of the rocker arm 42 to swing toward the center close to the docking ring 23. At this time, the clamping ring 41 recovers its deformation under the action of its own elasticity, thereby clamping the outer peripheral wall of the gas outlet end 32 of the gas meter module 3 and the outer peripheral wall of the driving ring 43, thereby improving the air tightness between the gas outlet end 32 of the gas meter module 3 and the output port 22 of the connecting seat 2, thereby improving the detection accuracy.

[0064] In addition, since the gas meter module 3 is made of plastic and has poor deformation resistance, the support ring 13 is used to support the air outlet end 32 of the gas meter module 3, and the clamping ring 41 is used to clamp the air outlet end 32 of the gas meter module 3, so that the main installation and fixing point of the gas meter module 3 is the air outlet end 32 of the gas meter module 3, thereby reducing the possibility of deformation of the connection (corner) between the air outlet end 32 of the gas meter module 3 and the gas meter module 3 caused by the downward pressure of the connecting seat 2 when the connecting seat 2 is installed on the mounting seat 1, thereby reducing the possibility of damage to the gas meter module 3 during the installation process. Example 3

[0065] An embodiment of the present application discloses an ultrasonic gas meter module testing tool.

[0066] Reference Fig.10 , Fig.11 The difference between the ultrasonic gas meter module test tool disclosed in the embodiment of the present application and embodiment 2 is that:

[0067] In this embodiment, the linkage 45 includes a second gear 453, a second rack 454 and a third rack 455. The second gear 453 is coaxially fixed to the outer peripheral wall of the rotating shaft 421. The end face of the driving ring 43 away from the mounting seat 1 is fixedly installed with a mounting frame 431. The second rack 454 and the third rack 455 are both fixedly installed on the side walls of the mounting frame 431, and both ends of the second rack 454 and the third rack 455 are both extended along the central axis of the docking ring 23. The second rack 454 is located on the side of the third rack 455 away from the driving ring 43.

[0068] Reference Fig.11 , Fig.12 , Fig.13 The second rack 454 drives the second gear 453 to rotate in a direction opposite to the direction of rotation of the third rack 455. In the normal state (the driving ring 43 moves to the side of the plug-in channel 411 close to the mounting seat 1), the second rack 454 is meshed with the second gear 453 for transmission, and in this state, the free end of the swing rod 42 swings toward the center of the docking ring 23 to make the clamping ring 41 contracted; when the outlet end 32 of the gas meter module 3 is pushed When the dynamic driving ring 43 moves toward the side away from the mounting base 1, the clamping ring 41 expands to allow the gas outlet end 32 of the gas meter module 3 to be inserted into the plug-in channel 411; when the second rack 454 disengages from the second gear 453 and the third rack 455 engages with the second gear 453, the gas outlet end 32 of the gas meter module 3 continues to push the driving ring 43 to move toward the side away from the mounting base 1, and the free end of the rocker arm 42 swings toward the center of the docking ring 23, so that the clamping ring 41 is transformed into a contracted state again.

[0069] The implementation principle of Example 3 of the present application is as follows: the driving ring 43 is normally displaced to the side of the plug-in channel 411 close to the mounting base 1 under the action of the reset spring 44, and when the air outlet end 32 of the gas meter module 3 pushes the driving ring 43, the second rack 454 engages with the second gear 453, thereby forcing the free end of the rocker arm 42 to swing away from the center of the docking ring 23 and open the clamping ring 41, so as to expand the plug-in channel 411 so that the air outlet end 32 of the gas meter module 3 can enter.

[0070] Continue to drive the gas outlet end 32 of the gas meter module 3 to continuously push the driving ring 43, so that the second rack 454 disengages from the second gear 453 and the third rack 455 engages with the second gear 453, thereby reversing the swing rod 42, that is, forcing the free end of the swing rod 42 to swing toward the center of the docking ring 23. At this time, the clamping ring 41 restores its deformation under the action of its own elasticity, thereby clamping to the outer peripheral wall of the gas outlet end 32 of the gas meter module 3.

[0071] As a result, two stages are formed when the gas outlet end 32 of the gas meter module 3 is inserted into the plug-in channel 411. The first stage is used to force the clamping ring 41 to expand, and the second stage is used to force the clamping ring 41 to shrink and tighten, so that when the connecting seat 2 and the mounting seat 1 are separated, the clamping ring 41 is in a contracted state, thereby reducing the possibility of the clamping ring 41 being in an expanded state for a long time and causing irreversible deformation. Example 4

[0072] An embodiment of the present application discloses an ultrasonic gas meter module testing tool.

[0073] Reference Fig.14 The difference between the ultrasonic gas meter module test tool disclosed in the embodiment of the present application and embodiment 3 is that:

[0074] In this embodiment, an embedded ring groove 231 is provided on the outer peripheral wall of the docking ring 23, and the embedded ring groove 231 is arranged in a ring shape around the central axis of the docking ring 23. An annular sealing ring 232 is embedded in the embedded ring groove 231, and the sealing ring 232 is made of rubber; the connecting seat 2 is provided with a clamping component 5, and when the clamping ring 41 is clamped on the outer peripheral wall of the gas outlet end 32 of the gas meter module 3, the clamping component 5 forces the outer peripheral wall of the sealing ring 232 to be pressed against the inner peripheral wall of the gas outlet end 32 of the gas meter module 3.

[0075] Reference Fig.14The clamping assembly 5 includes an airbag 51, a clamping ring plate 52 and a pushing strip 53. The airbag 51 is embedded in the embedded ring groove 231. The airbag 51 is filled with gas. The airbag 51 is arranged in a ring shape around the central axis of the docking ring 23, and the sealing ring 232 is located on the outside of the airbag 51; the clamping ring plate 52 is slidably installed in the embedded ring groove 231, one end of the pushing strip 53 is fixedly connected to the clamping ring plate 52, and the other end passes through the outside of the docking ring 23 for abutment by the mounting frame 431. When the air outlet end 32 of the gas meter module 3 pushes the driving ring 43 and forces the clamping ring 41 to clamp the outer peripheral wall of the air outlet end 32 of the gas meter module 3, the mounting frame 431 pushes the pushing strip 53 to move toward the side away from the mounting seat 1, so that the clamping ring plate 52 squeezes the airbag 51.

[0076] The implementation principle of Example 4 of the present application is as follows: when the clamping ring 41 is clamped to the outer peripheral wall of the gas outlet end 32 of the gas meter module 3, the clamping ring plate 52 can squeeze the airbag 51, so that the airbag 51 squeezes the sealing ring 232, forcing the sealing ring 232 to expand and press against the inner peripheral wall of the gas outlet end 32 of the gas meter module 3, so that the combination of the clamping ring 41 and the sealing ring 232 can clamp and fix the gas outlet end 32 of the gas meter module 3, and improve the air tightness between the gas outlet end 32 of the gas meter module 3 and the docking ring 23.

[0077] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultrasonic gas meter module testing tool, characterized in that: The invention comprises a mounting seat (1) and a connecting seat (2), wherein a mounting cavity for mounting a gas meter module (3) is formed between the mounting seat (1) and the connecting seat (2), and a side wall of the connecting seat (2) away from the mounting seat (1) is respectively provided with an input port (21) and an output port (22) connected to the mounting cavity, the gas inlet end (31) of the gas meter module (3) is connected to the mounting cavity, and the gas outlet end (32) of the gas meter module (3) is connected to the output port (22) of the connecting seat (2); a sealing ring (11) is provided between the mounting seat (1) and the connecting seat (2), and the sealing ring (11) is arranged in an annular shape around the mounting cavity, and the mounting seat (1) is provided with a sealing ring (11) disposed in an annular shape around the mounting cavity. ) and the connecting seat (2), and the mounting seat (1) and the connecting seat (2) are detachably connected via the connecting seat; the connecting seat (2) is provided with a docking ring (23) located in the mounting cavity, one end of the docking ring (23) is connected to the inner wall of the connecting seat (2) and is in communication with the output port (22) of the connecting seat (2), and one end of the docking ring (23) close to the mounting seat (1) is inserted into the gas outlet end (32) of the gas meter module (3); the connecting seat (2) is provided with a clamping mechanism (4), and the clamping mechanism (4) is used to clamp the outer peripheral wall of the gas outlet end (32) of the gas meter module (3).

2. The ultrasonic gas meter module testing tool according to claim 1, characterized in that: The mounting seat (1) is provided with a plurality of positioning columns (12) located in the mounting cavity, and the outer wall of the gas meter module (3) is provided with a plurality of positioning rings (33) for the positioning columns (12) to be inserted into, and the plurality of positioning rings (33) are arranged corresponding to the plurality of positioning columns (12). When the positioning columns (12) are inserted into the corresponding positioning rings (33) and the mounting seat (1) and the connecting seat (2) are connected, the gas outlet end (32) of the gas meter module (3) is connected to the output port (22) of the connecting seat (2).

3. The ultrasonic gas meter module testing tool according to claim 1, characterized in that: A support ring (34) is provided on the outer peripheral wall of the gas outlet end (32) of the gas meter module (3); the mounting seat (1) is provided with a supporting ring (13) located in the mounting cavity; one end of the supporting ring (13) is connected to the inner wall of the mounting seat (1), and the other end is used to support the supporting ring (34); and an avoidance notch (131) for avoiding the gas meter module (3) is provided on the end surface of the supporting ring (13) close to the connecting seat (2).

4. The ultrasonic gas meter module testing tool according to claim 1, characterized in that: The clamping mechanism (4) comprises a clamping ring (41), a swing rod (42) and a driving assembly. The clamping ring (41) is coaxially sleeved on the outer peripheral side of the docking ring (23). A plurality of swing rods (42) are arranged at intervals around the central axis of the docking ring (23). One end of each of the swing rods (42) is hinged to the inner wall of the connecting seat (2), and the free end of each of the swing rods (42) is connected to the clamping ring (41). The clamping ring (41) is elastically arranged. A plug-in passage (411) is formed between the clamping ring (41) and the docking ring (23) for inserting the gas outlet end (32) of the gas meter module (3); the driving component is arranged between the docking ring (23) and the swing rod (42); when the gas outlet end (32) of the gas meter module (3) is inserted into the plug-in passage (411), the driving component drives the swing rod (42) to swing, so that the clamping ring (41) is clamped to the outer peripheral wall of the gas outlet end (32) of the gas meter module (3).

5. The ultrasonic gas meter module testing tool according to claim 4, characterized in that: The end of the swing rod (42) away from the clamping ring (41) is provided with a rotating shaft (421), the rotating shaft (421) is rotatably connected to the inner wall of the connecting seat (2), and the swing rod (42) is hinged to the connecting seat (2) through the rotating shaft (421); the driving assembly comprises a driving ring (43), a return spring (44) and a linkage member (45), the driving ring (43) is slidably sleeved on the outer peripheral wall of the docking ring (23), and the return spring (44) is arranged between the driving ring (43) and the connecting seat (2). The return spring (44) normally causes the drive ring (43) to move to a side of the plug-in channel (411) close to the mounting seat (1) so as to be pushed by the gas outlet end (32) of the gas meter module (3); the linkage member (45) is arranged between the drive ring (43) and the rotating shaft (421); when the gas outlet end (32) of the gas meter module (3) pushes the drive ring (43) to move, the linkage member (45) drives the rotating shaft (421) to rotate so as to force the swing rod (42) to swing.

6. The ultrasonic gas meter module testing tool according to claim 5, characterized in that: The linkage member (45) comprises a first gear (451) and a first rack (452); the first gear (451) is coaxially connected to the rotating shaft (421); the first rack (452) is connected to the driving ring (43); the first gear (451) and the second rack (454) are meshed and transmitted; when the driving ring (43) moves to the side of the plug-in channel (411) close to the mounting seat (1), the clamping ring (41) expands to allow the gas outlet end (32) of the gas meter module (3) to be inserted into the plug-in channel (411); when the gas outlet end (32) of the gas meter module (3) pushes the driving ring (43) to move toward the side away from the mounting seat (1), the clamping ring (41) restores its shape and clamps to the outer peripheral wall of the gas outlet end (32) of the gas meter module (3).

7. The ultrasonic gas meter module testing tool according to claim 5, characterized in that: The linkage member (45) comprises a second gear (453), a second rack (454) and a third rack (455); the second gear (453) is coaxially connected to the rotating shaft (421); a mounting frame (431) is provided on the end face of the drive ring (43) away from the mounting seat (1); the second rack (454) and the third rack (455) are both arranged on the mounting frame (431); the second rack (454) is located on a side of the third rack (455) away from the drive ring (43); The rotation direction of the second gear (453) driven by the third rack (454) is opposite to the rotation direction of the second gear (453) driven by the third rack (455); the second rack (454) is normally meshed with the second gear (453) for transmission, and when the outlet end (32) of the gas meter module (3) pushes the drive ring (43) to move toward a side away from the mounting seat (1), the clamping ring (41) expands to allow the outlet end (32) of the gas meter module (3) to be inserted into the plug-in channel (411).

8. The ultrasonic gas meter module testing tool according to claim 5, characterized in that: When the free end of the swing rod (42) swings toward the center of the docking ring (23), the clamping ring (41) recovers its shape and simultaneously clamps onto the outer peripheral wall of the gas outlet end (32) of the gas meter module (3) and the outer peripheral wall of the driving ring (43).

9. The ultrasonic gas meter module testing tool according to claim 4, characterized in that: The outer peripheral wall of the docking ring (23) is provided with an embedded ring groove (231), and a sealing ring (232) is embedded in the embedded ring groove (231); the connecting seat (2) is provided with a tightening assembly (5), and when the tightening ring (41) is tightened against the outer peripheral wall of the gas outlet end (32) of the gas meter module (3), the tightening assembly (5) forces the outer peripheral wall of the sealing ring (232) to press against the inner peripheral wall of the gas outlet end (32) of the gas meter module (3).

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