Gas tightness calibrating device for gas meter

Abstract

The utility model discloses a gas meter gas tightness calibrating device, which relates to the technical field of gas meter gas tightness calibrating devices and comprises a sonic spray end type gas meter checking device and a clamping and jacking assembly. The clamping and jacking assembly comprises a jacking unit and a limiting and clamping unit. The limiting clamping unit is used for clamping the gas meter to be detected in the middle in the upward moving process of the jacking unit, so that automatic alignment operation of the gas inlet end and the gas outlet end of the gas meter to be detected and the detection connecting gas nozzle is achieved. According to the utility model, by arranging the clamping and jacking assembly, automatic alignment and butt joint operation of the gas inlet end and the gas outlet end of the gas meter to be detected and the detection connection gas nozzle can be realized, so that in the butt joint process of the gas meter to be detected and the detection connection gas nozzle, the operations of manual supporting and fine adjustment and alignment are omitted; and the detection operation convenience of the sonic spray end type gas meter detection device is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meter airtightness verification devices, and specifically relates to a gas meter airtightness verification device. Background Technique

[0002] The airtightness test and inspection of gas meters are important links to ensure the safe operation of gas systems. After the production of gas meters is completed, airtightness tests must be carried out to ensure that the system does not leak, thereby guaranteeing the life and property safety of users.

[0003] Currently, most gas meter airtightness detections use sonic nozzle type gas meter inspection devices for detection. For example, the GNP type sonic nozzle method gas meter detection device. The sonic nozzle type gas meter inspection device is a device used to verify gas meters and usually consists of the following parts:

[0004] Power system: including a fan, frequency converter, etc., to provide power for the device;

[0005] Control system: including a control cabinet, control software, etc., to control the operation of the device;

[0006] Standard source system: composed of front and rear stagnation condensers, valves, nozzles, etc., to provide a standard gas flow;

[0007] System under test: including front and rear straight pipe sections, workbench, meter clamp, and connecting valves, etc., to install and verify the gas meter under test;

[0008] The working principle of the sonic nozzle type gas meter inspection device is to use a sonic nozzle to generate a stable air flow, and judge the accuracy and precision of the gas meter by comparing the readings of the gas meter under test with the standard flow.

[0009] When the existing GNP type sonic nozzle method gas meter detection device conducts gas meter airtightness detection, the gas meter to be detected is placed on a lifting seat, and then the lifting seat is driven to move upward by an electric push rod, so that the inlet end and outlet end of the detected gas meter are docked with two detection connection nozzles, and then the detection operation can be carried out. The overall operation is simple and convenient;

[0010] However, in the actual operation process, since the top of the lifting seat is a flat structure, when the gas meter is placed on the lifting seat, it is impossible to ensure that the inlet end and outlet end of the gas meter to be detected are aligned with the detection connection nozzles. During the upward movement of the lifting seat, personnel need to manually support the gas meter to be detected and finely adjust it to achieve the alignment and docking of the inlet end and outlet end with the detection connection nozzles. This operation is rather inconvenient. Based on this, a gas meter airtightness verification device is provided. Content of the Utility Model

[0011] The purpose of the present utility model is to provide a gas meter airtightness verification device in order to solve the problems in the rising background.

[0012] To achieve the above object, the present utility model provides the following technical solution: A gas meter airtightness verification device includes a sonic nozzle type gas meter inspection device composed of a machine base main body, an n-shaped top frame, and a detection connection nozzle. The n-shaped top frame is fixed to the top end of the machine base main body, and the detection connection nozzle is installed at the bottom of the horizontal part at the top of the n-shaped top frame. A clamping and lifting assembly is arranged between the machine base main body and the n-shaped top frame. The clamping and lifting assembly is used to realize the docking operation between the gas meter to be tested and the detection connection nozzle and to fix the gas meter to be tested.

[0013] The clamping and lifting assembly includes a lifting unit and a limiting clamping unit.

[0014] The lifting unit is used to support the bottom of the gas meter to be tested and at the same time push the gas meter to be tested upward to realize the docking operation between the inlet end and the outlet end of the gas meter to be tested and the detection connection nozzle.

[0015] The limiting clamping unit is used to centrally clamp the gas meter to be tested during the upward movement of the lifting unit, so as to realize the automatic alignment operation between the inlet end and the outlet end of the gas meter to be tested and the detection connection nozzle.

[0016] As a further scheme of the present utility model: The lifting unit includes a fixed guide rail, an electric push rod, a lifting seat, and a limiting back plate.

[0017] The fixed guide rail is fixed between the top end of the machine base main body and the bottom end of the horizontal part at the top of the n-shaped top frame, and the fixed guide rail is located at the rear end between the two detection connection nozzles.

[0018] The electric push rod is installed at the top end of the machine base main body and is distributed at the front end of the fixed guide rail. The lifting seat is limitedly slidably connected to the front end of the fixed guide rail and is fixed to the top of the output end of the electric push rod. The limiting back plate is fixed to the top of the lifting seat and fits against the front end of the fixed guide rail.

[0019] The lifting seat is used to support the gas meter to be tested, the limiting back plate is used to provide limitation for the back of the gas meter to be tested, and the fixed guide rail drives the lifting seat to move upward to realize the docking operation between the gas meter to be tested and the detection connection nozzle.

[0020] As a further scheme of the present utility model: The limiting clamping unit includes a fixed pressing block, a horizontal sliding groove, a pressed block, a connecting rod, and an L-shaped clamping block.

[0021] The horizontal sliding grooves are symmetrically arranged on both sides of the limiting back plate and penetrate through the front and rear ends of the limiting back plate. The pressing blocks are distributed at the rear end of the limiting back plate. The connecting rod is fixed to the front end of the pressing block and is slidably connected to the horizontal sliding groove. The connecting rod penetrates through the horizontal sliding groove to the front end of the limiting back plate and is fixedly connected to the L-shaped clamping block.

[0022] The fixed pressing blocks are symmetrically fixed to the bottom end of the transverse part at the top of the n-shaped top frame with the fixed guide rail as the center, and the bottom side of the fixed pressing block is in contact with the top side of the pressing block.

[0023] When the lifting seat and the limiting back plate move upward, the pressing block is horizontally moved under the extrusion from the fixed pressing block, so as to realize the mutual approach of the two L-shaped clamping blocks. The two L-shaped clamping blocks are used to push and clamp the gas meter to be measured, so as to realize the automatic alignment of the inlet end and the outlet end of the gas meter to be measured with the detection connection nozzle.

[0024] As a further scheme of the present utility model: the sides of the pressing block and the fixed pressing block in contact with each other are both of arc surface structures, and the end surfaces of the pressing block, the L-shaped clamping block and the horizontal sliding groove are in a fitting state.

[0025] As a further scheme of the present utility model: the limiting and clamping unit further includes fixed side plates and compression elastic sheets;

[0026] The fixed side plates are symmetrically fixed to the rear end of the horizontal sliding groove, and the fixed side plates are distributed on the outer sides of both sides of the fixed guide rail;

[0027] The compression elastic sheets are distributed between the pressing block and the fixed side plates, and the two end heads of the compression elastic sheets are respectively adhesively fixed to the pressing block and the fixed side plates;

[0028] The compression elastic sheets are used to provide a thrust for the two pressing blocks to move away from each other.

[0029] Compared with the prior art, the beneficial effects of the present utility model are:

[0030] By setting the clamping and lifting assembly, the automatic alignment and docking operation of the inlet end and the outlet end of the gas meter to be measured with the detection connection nozzle can be realized. During the docking process of the gas meter to be measured and the detection connection nozzle, the operations of manual support and fine adjustment alignment are omitted, and the detection operation convenience of the sonic nozzle type gas meter inspection device is further improved. Brief Description of the Drawings

[0031] Figure 1 is a structural schematic diagram of the present utility model;

[0032] Figure 2 is a split schematic diagram of the clamping and lifting assembly of the present utility model;

[0033] Figure 3Schematic diagram of the rear-end structure of the present utility model;

[0034] Figure 4 Partial part structure distribution diagram of the clamping and lifting assembly of the present utility model;

[0035] Figure 5 Partial part disassembly schematic diagram of the clamping and lifting assembly of the present utility model.

[0036] In the figure: 1. Sonic nozzle type gas meter inspection device; 101. Machine base main body; 102. N-shaped top frame; 103. Detection connection nozzle; 2. Clamping and lifting assembly; 201. Fixed guide rail; 202. Fixed pressure block; 203. Electric push rod; 204. Lifting seat; 205. Limit back plate; 206. Horizontal sliding groove; 207. Compressed block; 208. Connecting rod; 209. L-shaped clamp block; 210. Fixed side plate; 211. Compression spring piece. Specific implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] Please refer to Figures 1 to 5 , in the embodiment of the present utility model, a gas meter airtightness verification device includes a sonic nozzle type gas meter inspection device 1 composed of a machine base main body 101, an N-shaped top frame 102, and a detection connection nozzle 103. The N-shaped top frame 102 is fixed to the top end of the machine base main body 101, and the detection connection nozzle 103 is installed at the bottom of the horizontal part at the top of the N-shaped top frame 102. A clamping and lifting assembly 2 is arranged between the machine base main body 101 and the N-shaped top frame 102. The clamping and lifting assembly 2 is used to realize the docking operation between the gas meter to be tested and the detection connection nozzle 103 and fix the gas meter to be tested;

[0039] The clamping and lifting assembly 2 includes a lifting unit and a limit clamping unit;

[0040] The lifting unit is used to form a support for the bottom of the gas meter to be tested, and at the same time push the gas meter to be tested upward to realize the docking operation between the inlet end and the outlet end of the gas meter to be tested and the detection connection nozzle 103;

[0041] The limit clamping unit is used to centrally clamp the gas meter to be tested during the upward movement of the lifting unit, so as to realize the automatic alignment operation between the inlet end and the outlet end of the gas meter to be tested and the detection connection nozzle 103;

[0042] The lifting unit includes a fixed guide rail 201, an electric push rod 203, a lifting seat 204, and a limit back plate 205;

[0043] The fixed guide rail 201 is fixed between the top end of the machine base main body 101 and the bottom end of the horizontal part at the top of the n-shaped top frame 102, and the fixed guide rail 201 is located at the rear end between the two detection connection nozzles 103;

[0044] The electric push rod 203 is installed at the top end of the machine base main body 101 and is distributed at the front end of the fixed guide rail 201. The lifting seat 204 is connected to the front end of the fixed guide rail 201 in a limited sliding manner and is fixed to the top of the output end of the electric push rod 203. The limit back plate 205 is fixed to the top of the lifting seat 204 and fits against the front end of the fixed guide rail 201;

[0045] The lifting seat 204 is used to support the gas meter to be tested, the limit back plate 205 is used to limit the back of the gas meter to be tested, and the fixed guide rail 201 drives the lifting seat 204 to move upward to realize the docking operation between the gas meter to be tested and the detection connection nozzle 103;

[0046] The limit clamping unit includes a fixed pressing block 202, a horizontal chute 206, a pressed block 207, a connecting rod 208, and an L-shaped clamping block 209;

[0047] The horizontal chute 206 is symmetrically opened on both sides of the limit back plate 205 and penetrates through the front and rear ends of the limit back plate 205. The pressed block 207 is distributed at the rear end of the limit back plate 205. The connecting rod 208 is fixed to the front end of the pressed block 207 and is slidably connected to the horizontal chute 206. The connecting rod 208 penetrates through the horizontal chute 206 to the front end of the limit back plate 205 and is fixedly connected to the L-shaped clamping block 209;

[0048] The fixed pressing block 202 is symmetrically fixed to the bottom end of the horizontal part at the top of the n-shaped top frame 102 with the fixed guide rail 201 as the center, and the bottom side of the fixed pressing block 202 is in contact with the top side of the pressed block 207;

[0049] When the lifting seat 204 and the limit back plate 205 move upward, the pressed block 207 is horizontally moved under the extrusion from the fixed pressing block 202, so as to realize the mutual approach of the two L-shaped clamping blocks 209, and the gas meter to be tested is pushed and clamped by the two L-shaped clamping blocks 209 to realize the automatic alignment of the inlet end and the outlet end of the gas meter to be tested with the detection connection nozzle 103.

[0050] In this embodiment: When the sonic nozzle type gas meter inspection device 1 is in use, its operation steps are as follows:

[0051] Place the gas meter to be tested on the top of the lifting seat 204, with the intake end and the outlet end of the gas meter to be tested facing upward, and the digital meter of the gas meter to be tested facing the front end. It is okay after the rear end of the gas meter to be tested touches the limit back plate 205 (it should be noted that: the initial state of the two L-shaped clamping blocks 209 is in a state of moving away from each other, and the distance between the two L-shaped clamping blocks 209 is greater than the outer wall width of the gas meter to be tested, so it will not interfere with the placement of the gas meter to be tested);

[0052] After placing the gas meter to be tested, the electric push rod 203 can be started. The electric push rod 203 drives the lifting seat 204, the limit back plate 205, the pressure receiving block 206, the connecting rod 207, and the L-shaped clamping blocks 209 to move upward as a whole. During this process, the pressure receiving block 206 and the fixed pressure block 202 are squeezed against each other. Under the action of this squeezing force, the pressure receiving block 206 moves closer to the middle of the limit back plate 205. The pressure receiving block 206 drives the L-shaped clamping blocks 209 to move through the connecting rod 207. The two L-shaped clamping blocks 209 move closer to each other to form a centered clamping of the gas meter to be tested, so as to realize the automatic alignment of the intake end and the outlet end of the gas meter to be tested with the detection connection nozzle 103;

[0053] After that, the centered and fixed gas meter to be tested continues to move upward with the lifting seat 204. Finally, the intake end and the outlet end of the gas meter to be tested are respectively inserted into the inner sides of the two detection connection nozzles 103, and then the detection operation can be carried out (it should be noted that: the detection structure of the sonic nozzle type gas meter inspection device 1 is a prior art structure, and this solution does not improve it, so it is not described in detail);

[0054] Through the cooperation of the above-mentioned multiple parts, during the docking process of the gas meter to be tested and the detection connection nozzle 103, the operations of manual support and fine-tuning alignment are omitted, further improving the detection operation convenience of the sonic nozzle type gas meter inspection device 1.

[0055] Please refer to with emphasis Figures 1 to 5 , the side surfaces of the pressure receiving block 207 and the fixed pressure block 202 in contact with each other are both arc-shaped structures, and the pressure receiving block 207, the L-shaped clamping block 209 and the end surface of the horizontal chute 206 are in a fitting state.

[0056] In this embodiment: through the arc-shaped structures of the pressure receiving block 207 and the fixed pressure block 202, the resistance is smaller when they are in contact and squeezed against each other, and at the same time, the function of the horizontal movement of the pressure receiving block 207 under force is realized. Finally, the vertical side surfaces of the pressure receiving block 207 and the fixed pressure block 202 are in contact, ensuring the stable clamping function of the L-shaped clamping block.

[0057] Please refer to with emphasis Figures 1 to 5 , the limit clamping unit further includes a fixed side plate 210 and a compression spring piece 211;

[0058] The fixed side plates 210 are symmetrically fixed to the rear end of the horizontal sliding groove 206, and the fixed side plates 210 are distributed on both outer sides of the fixed guide rail 201;

[0059] The compression elastic pieces 211 are distributed between the pressure-receiving blocks 207 and the fixed side plates 210, and both ends of the compression elastic pieces 211 are adhesively fixed to the pressure-receiving blocks 207 and the fixed side plates 210 respectively;

[0060] The compression elastic pieces 211 are used to provide a thrust for the two pressure-receiving blocks 207 to move away from each other.

[0061] In this embodiment, it should be supplemented that the compression elastic pieces 211 are always in a compressed state, so that the two L-shaped clamping blocks 209 can maintain a stable state of moving away from each other;

[0062] During the upward movement and horizontal movement of the pressure-receiving block 207 under pressure, the compression elastic pieces 211 are further squeezed and contracted, so as to provide power for the subsequent downward reset of the pressure-receiving block 207.

[0063] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A gas meter air tightness testing device, comprising a sonic nozzle-end type gas meter testing device (1) consisting of a base body (101), an n-type top frame (102), and a detection connection gas nozzle (103), wherein the n-type top frame (102) is fixed to the top of the base body (101), and the detection connection gas nozzle (103) is installed at the bottom of the horizontal part of the top of the n-type top frame (102), characterized in that: A clamping and lifting assembly (2) is provided between the machine base body (101) and the n-type top frame (102), and the clamping and lifting assembly (2) is used to achieve a docking operation between the gas meter to be tested and the detection connection gas nozzle (103) and to fix the gas meter to be tested; The clamping and lifting assembly (2) comprises a lifting unit and a limiting clamping unit; The lifting unit is used to support the bottom of the gas meter to be tested, and at the same time push the gas meter to be tested upward to achieve a docking operation between the gas inlet and outlet ends of the gas meter to be tested and the detection connection gas nozzle (103); The position limiting clamping unit is used to centrally clamp the gas meter to be tested during the upward movement of the lifting unit, thereby achieving automatic alignment of the gas inlet and outlet ends of the gas meter to be tested and the detection connection gas nozzle (103).

2. A gas meter air tightness testing device according to claim 1, characterized in that: The lifting unit comprises a fixed guide rail (201), an electric push rod (203), a lifting seat (204), and a limiting back plate (205); The fixed guide rail (201) is fixed between the top of the machine base body (101) and the bottom of the top lateral part of the n-shaped top frame (102), and the fixed guide rail (201) is located at the rear end between the two detection connection air nozzles (103); The electric push rod (203) is installed on the top of the base body (101) and distributed at the front end of the fixed guide rail (201); the lifting seat (204) is limitedly slidably connected to the front end of the fixed guide rail (201) and fixed to the top of the output end of the electric push rod (203); the limiting back plate (205) is fixed to the top of the lifting seat (204) and fits the front end of the fixed guide rail (201); The lifting seat (204) is used to provide support for the gas meter to be tested, the limiting back plate (205) is used to provide limiting for the back of the gas meter to be tested, and the fixed guide rail (201) drives the lifting seat (204) to move upward to achieve a docking operation between the gas meter to be tested and the detection connection gas nozzle (103).

3. A gas meter air tightness testing device according to claim 2, characterized in that: The position limiting clamping unit comprises a fixed pressure block (202), a horizontal slide groove (206), a pressure block (207), a connecting rod (208), and an L-shaped clamping block (209); The horizontal slide groove (206) is symmetrically arranged on both sides of the limiting back plate (205) and passes through the front and rear ends of the limiting back plate (205); the pressure block (207) is distributed at the rear end of the limiting back plate (205); the connecting rod (208) is fixed to the front end of the pressure block (207) and is slidably connected to the horizontal slide groove (206); the connecting rod (208) passes through the horizontal slide groove (206) to the front end of the limiting back plate (205) and is fixedly connected to the L-shaped clamp block (209); The fixed pressing block (202) is symmetrically fixed to the bottom end of the top lateral part of the n-type top frame (102) with the fixed guide rail (201) as the center, and the bottom end side surface of the fixed pressing block (202) is in contact with the top end side surface of the pressure block (207); When the lifting seat (204) and the limiting back plate (205) move upward, the pressure block (207) is squeezed by the fixed pressure block (202) to move horizontally, thereby achieving the mutual approach of the two L-shaped clamping blocks (209). The gas meter to be tested is pushed and clamped by the two L-shaped clamping blocks (209), so as to achieve automatic alignment of the gas inlet end and the gas outlet end of the gas meter to be tested with the detection connection gas nozzle (103).

4. A gas meter air tightness testing device according to claim 3, characterized in that: The sides of the pressure block (207) and the fixed pressure block (202) that are in contact with each other are both in an arc structure, and the end faces of the pressure block (207), the L-shaped clamping block (209) and the horizontal slide groove (206) are in a fitted state.

5. A gas meter air tightness testing device according to claim 3, characterized in that: The position limiting clamping unit further comprises a fixed side plate (210) and a compression spring sheet (211); The fixed side plates (210) are symmetrically fixed to the rear end of the horizontal slide groove (206), and the fixed side plates (210) are distributed on both sides of the outside of the fixed guide rail (201); The compression spring sheet (211) is distributed between the pressure-bearing block (207) and the fixed side plate (210), and two ends of the compression spring sheet (211) are respectively bonded and fixed to the pressure-bearing block (207) and the fixed side plate (210); The compression spring sheet (211) is used to provide a thrust for the two compressed blocks (207) to move away from each other.

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