Automatic detection device for gas meter air tightness

Abstract

The present invention discloses an automatic gas meter air tightness detection device, which relates to the field of gas meter detection technology, and includes: a detection frame and a conveying platform, wherein the conveying platform is horizontally arranged and passes through the middle of the detection frame horizontally, and a clamping and fixing component is provided on the conveying platform; a gas meter is arranged on the conveying platform, and an air inlet and an air outlet are respectively provided at both ends of the top; a driving device is arranged at the top center of the detection frame, and a gas injection detection device and a mobile detection device are respectively provided on both sides; a connecting device connects the driving device and the gas meter; and two adjusting devices are symmetrically distributed and located inside the detection frame, and fixed to the bottom of the gas injection detection device and the mobile detection device. Compared with the existing technology, the present invention enables the gas meter to be in a stable environment during the detection process. After gas is injected into the gas meter, the air tightness of the gas meter is accurately judged by monitoring the sliding distance of the lower slider and the air pressure on the inner wall of the gas meter.

Description

Technical Field

[0001] The present invention relates to the technical field of gas meter detection, and more particularly to an automatic gas meter air tightness detection device. Background Art

[0002] Gas meters are widely used measuring instruments in daily life, and their air tightness is directly related to the safety and accuracy of gas use. In order to ensure the safety performance of gas meters during production, installation and use, air tightness testing of gas meters is a vital link. The air tightness test of gas meters is usually carried out by the inflation and pressure relief method. Compressed air is filled into the gas meter. After the amount of compressed air reaches the set value, the two outlets of the gas meter are sealed. After a period of time, the air pressure in the gas meter is tested again. If the air pressure is maintained within the specified air pressure threshold, the air tightness is good. If the air pressure is lower than the specified air pressure threshold, the air tightness is poor. Traditional gas meter air tightness testing methods have many shortcomings, such as low detection efficiency, inaccurate test results, complicated operation, etc., which make it difficult to realize automation and perform efficient and accurate detection of the air tightness of gas meters. Therefore, it is necessary to provide an automatic gas meter air tightness detection device to solve the problems raised in the above background technology. Summary of the Invention

[0003] To achieve the above-mentioned object, the present invention provides the following technical solution: a gas meter air tightness automatic detection device, comprising:

[0004] A detection rack and a conveying platform, wherein the conveying platform is horizontally arranged and horizontally passes through the middle of the detection rack;

[0005] A gas meter is installed on the delivery platform, and an air inlet and an air outlet are respectively provided at both ends of the top of the gas meter, and the air inlet and the air outlet are threaded structures;

[0006] The clamping and fixing assembly is fixed on both sides of the conveying platform and is located in the inner center of the detection frame. The clamping and fixing assembly is provided with two symmetrically distributed sliding tables, which are fixed on both sides of the conveying platform and have a clamping slider sliding on the top;

[0007] A driving device is arranged at the top center of the detection frame;

[0008] A connecting device, the top of which is fixed to the bottom of the driving device, and the bottom of the connecting device corresponds to the top of the gas meter;

[0009] A gas injection detection device is provided on one side of the driving device at the top of the detection frame;

[0010] A mobile detection device is arranged on the top of the detection frame on a side of the driving device away from the gas injection detection device;

[0011] The regulating devices are symmetrically distributed with two of them, located inside the detection rack and fixed on the bottom of the gas injection detection device and the mobile detection device.

[0012] Furthermore, preferably, the detection rack includes:

[0013] A frame and a main closing assembly, wherein two sets of main closing assemblies are symmetrically distributed front and back on the frame;

[0014] a first side closure assembly disposed on a side of the frame and positioned above the input side of the conveying platform;

[0015] A second side closure assembly is provided on a side of the frame opposite to the first side closure assembly and is located above the output side of the conveying platform;

[0016] The bearing panel is fixed on the top of the frame and is fixedly connected to the driving device, the gas injection detection device and the movement detection device.

[0017] That is to say, when the conveying platform conveys the gas meter to the detection rack, the first side closing assembly is opened, and after the gas meter enters the frame, the first side closing assembly and the second side closing assembly are closed, and then the gas meter is fixed by the clamping slider of the clamping fixing assembly. After confirming that the gas meter is fixed, the front main closing assembly is closed, and the rear main closing assembly is always in a closed state. At this time, the frame is completely closed by the closing assembly to limit the gas flow inside the frame, effectively reducing the impact of temperature changes caused by gas flow on the gas meter, and keeping the gas meter in a stable detection environment. When the gas meter is inspected, the first side closing assembly and the second side closing assembly are opened at the same time, and the gas meter that has been inspected is output while a new gas meter to be inspected is transported.

[0018] Furthermore, preferably, the driving device includes:

[0019] The connecting frame is fixed at the top center of the detection frame and passes through the top plane of the detection frame;

[0020] Hydraulic shaft, fixed at the top center of the connecting frame;

[0021] The shaft body is slidably arranged in the hydraulic shaft, and the shaft body passes through the center of the connecting frame and is fixedly connected to the top of the connecting device.

[0022] That is to say, driven by the hydraulic shaft, the connecting device is driven to move up and down through the shaft body. When the gas meter is fixed under the action of the clamping and fixing assembly, the hydraulic shaft drives the shaft body to extend downward, so that the connecting device is fixedly connected to the air inlet and outlet at the top of the gas meter. The air tightness of the gas meter is tested by the gas injection detection device and the movement detection device. After the test is completed, the hydraulic shaft drives the shaft body to contract, and drives the connecting device to separate from the gas meter.

[0023] Furthermore, preferably, the connecting device includes:

[0024] The movable panel is located inside the detection frame and is horizontally arranged above the conveying platform;

[0025] A connecting piece, fixed at the top center of the movable panel, used to connect the movable panel and the shaft;

[0026] Two symmetrically positioned locking assemblies are fixed to the bottom of the movable panel, corresponding to the air inlet and outlet on the top of the gas meter. Driven by the shaft, the movable panel moves downward via the connector, driving the locking assemblies toward the locations of the air inlet and outlet on the top of the gas meter, where they are secured.

[0027] Furthermore, preferably, the locking and fixing assembly includes:

[0028] A connecting ring, fixed to the bottom of the movable panel;

[0029] A sealing ring is provided inside the connecting ring and corresponds to the top of the air inlet and the air outlet;

[0030] A nut is rotatably disposed at the bottom of the connecting ring, and its internal threads correspond to the external threads of the air inlet and the air outlet;

[0031] The gear ring is fixed on the outside of the nut and is connected to the adjusting device.

[0032] When the hydraulic shaft drives the shaft body to extend, the shaft body drives the locking and fixing assembly to move down through the movable panel and fit with the air inlet and outlet at the top of the gas meter. When the bottom of the nut fits with the air inlet and outlet respectively, the adjusting device drives the nut to rotate through the gear ring, and at the same time, the shaft body drives the movable panel to move downward continuously, so that the air inlet and outlet are fixedly connected with the corresponding nuts respectively, and the top of the air inlet and outlet are deep into the connecting ring and fit with the sealing ring. Under the action of the sealing ring, the locking and fixing assembly and the air inlet and outlet of the gas meter are tightly connected, effectively ensuring the air tightness of the connection. After the inspection is completed, the adjusting device drives the nut to rotate in the opposite direction through the gear ring, and at the same time, the shaft body drives the movable panel to move up until the connecting device is detached from the gas meter.

[0033] Furthermore, preferably, the gas injection detection device includes:

[0034] The first slide rail is vertically arranged and fixed on the top of the detection rack 1;

[0035] An active slider is slidably arranged on the first slide rail and is located above the detection rack;

[0036] a first detection shaft, which passes through the driving device and the connecting device, and is slidably connected to the driving device and fixedly connected to the connecting device;

[0037] An outer gas injection tube and an inner gas injection tube, the outer gas injection tube is slidingly arranged outside the inner gas injection tube, the outer gas injection tube is slidingly arranged in the first detection axis, and the upper part of the outer gas injection tube is fixedly connected to the active slider, the top of the inner gas injection tube is fixedly connected to the external gas injection mechanism, and a sealing ring corresponding to the outer gas injection tube is provided on the inner side of the bottom, and the position of the inner gas injection tube and the first detection axis is relatively fixed.

[0038] That is to say, under the action of the connecting device, the gas injection detection device is fixedly connected to the air inlet of the gas meter. It should be noted that when the first detection axis moves downward or upward on the connecting frame under the drive of the movable panel, the gas injection inner tube also moves with the first detection axis, so that the position between the gas injection inner tube and the first detection axis always remains relatively fixed. Then, the active slider moves downward on the first slide rail, and then driven by the active slider, the gas injection outer tube moves toward the inside of the gas meter through the air inlet, and then pressurized gas is injected into the gas injection inner tube through the external gas injection mechanism. The pressurized gas is transported to the inside of the gas meter through the gas injection outer tube, and the gas meter is quickly filled from the middle of the gas meter. As the gas inside the gas meter is gradually filled, the active slider gradually drives the gas injection outer tube to move upward until the gas injection outer tube is connected to the sealing ring on the gas injection inner tube, and the gas injection is stopped.

[0039] Further, preferably, the first detection axis includes:

[0040] The first upper slider is annular and fixed to the inner wall of the first detection shaft, and the gas injection outer tube is slidably connected to the first upper slider;

[0041] A first lower sliding block is annular and slidably disposed between the first detection shaft and the gas injection outer tube;

[0042] The first compression spring is fixed between the first upper slider and the first lower slider.

[0043] That is to say, pressurized gas is injected into the gas injection inner tube through the external gas injection mechanism, and the pressurized gas is transported to the inside of the gas meter through the gas injection outer tube, and quickly fills the gas meter from the middle of the gas meter. As the gas inside the gas meter is gradually filled, the pressurized gas inside the gas meter lifts up the first lower slider, compresses the first compression spring, and then the active slider gradually drives the gas injection outer tube to move upward until the gas injection outer tube is connected to the sealing ring on the gas injection inner tube, and the gas injection is stopped. At this time, the position of the first lower slider gradually stabilizes. If the sliding distance of the first lower slider driven by the first compression spring exceeds the error range, the gas meter is not air-tight. If the sliding distance of the first lower slider driven by the first compression spring is within the error range, the gas meter is better air-tight.

[0044] Furthermore, preferably, the gas injection outer tube includes:

[0045] A gas injection port is provided at the bottom center of the gas injection outer tube;

[0046] A connecting ring is fixedly connected to the gas injection port, is located inside the gas injection outer tube, and corresponds to the sealing ring;

[0047] The first detection head is fixed on the outside of the gas injection port.

[0048] That is to say, when pressurized gas is injected into the gas injection inner tube through the external gas injection mechanism, the pressurized gas flows to the gas injection port through the connecting ring at the bottom of the gas injection outer tube, and the pressurized gas is transported to the inside of the gas meter through the gas injection port. As the gas inside the gas meter is gradually filled with gas, the active slider gradually drives the gas injection outer tube to move upward until the connecting ring inside the gas injection outer tube is connected to the sealing ring on the gas injection inner tube, closing the connecting ring and stopping gas injection. While the internal air tightness of the gas meter is tested by the first lower slider, the internal air pressure of the gas meter is monitored in real time by the first detection head. Through double detection, the air tightness of the gas meter can be accurately judged.

[0049] Furthermore, preferably, the movement detection device includes:

[0050] The second slide rail is vertically arranged, passes through the load-bearing panel, and is fixedly connected to the load-bearing panel;

[0051] A passive slider is slidably disposed on the second slide rail and is located above the bearing panel;

[0052] a second detection shaft, passing through the connecting frame and the connecting device, the second detection shaft being slidably connected to the connecting frame, and the bottom of the second detection shaft corresponding to the connecting ring;

[0053] The movable shaft is slidably arranged inside the second detection shaft, the top of the movable shaft is fixedly connected to the passive sliding block, and the bottom of the movable shaft is provided with a second detection head.

[0054] That is to say, under the action of the connecting device, the mobile detection device is fixedly connected to the gas outlet of the gas meter. As the gas injection detection device continues to inject pressurized gas into the gas meter, the moving shaft is lifted up and slides upward in the second detection shaft, thereby driving the passive slider to slide upward on the second slide rail.

[0055] Further, preferably, the second detection axis includes:

[0056] The second upper slider is annular and fixed to the inner wall of the second detection shaft, and the movable shaft is slidably connected to the second upper slider;

[0057] The second lower sliding block is annular and slidably disposed on the inner wall of the second detection shaft and fixedly connected to the outer wall of the moving shaft;

[0058] The second compression spring is fixed between the second upper slider and the second lower slider.

[0059] As the gas injection detection device continues to inject pressurized gas into the gas meter, the movable shaft is lifted up, and at the same time, the second lower slider slides upward in the second detection shaft synchronously with the movable shaft to compress the second compression spring. After the gas injection is completed, the second compression spring rebounds and resets, and the gas inside the gas meter continues to lift the second lower slider. The air tightness of the gas meter is subsequently judged by the moving range of the second lower slider. Since the second lower slider moves synchronously with the movable shaft, the air tightness of the gas meter can also be judged by the position change of the passive slider on the second slide rail, and the second detection head at the bottom of the movable shaft monitors the internal air pressure of the gas meter in real time.

[0060] Furthermore, preferably, the regulating device includes:

[0061] A connecting plate fixed to the bottom of the gas injection detection device or the mobile detection device;

[0062] The driving box is fixed to the side of the connecting plate;

[0063] The adjusting shaft is vertically arranged and fixedly connected to the driving box;

[0064] A drive assembly is fixed to the bottom of the adjustment shaft;

[0065] The transmission gear is fixed to the bottom of the driving assembly and meshes with the gear ring in the connecting device.

[0066] That is to say, when the locking and fixing assembly fits with the air inlet and air outlet on the top of the gas meter, that is, when the bottom of the nut fits with the air inlet and air outlet respectively, the drive box controls the movement of the adjusting shaft so that the transmission gear on the drive assembly remains engaged with the gear ring outside the nut. Driven by the drive assembly, the transmission gear drives the nut to rotate through the gear ring, and at the same time, the shaft drives the movable panel to continue to move downward, and then the air inlet and air outlet are fixedly connected to the corresponding nuts respectively. After the detection is completed, the drive assembly drives the gear ring to reverse through the transmission gear, and then drives the nut to rotate in the opposite direction. At the same time, the shaft drives the movable panel to move upward, and the drive box controls the adjustment shaft to move upward until the connecting device is detached from the gas meter.

[0067] Compared with the prior art, the present invention has the following beneficial effects:

[0068] In the present invention, by setting up multiple sealing components on the side of the detection frame, when the gas meter is tested for air tightness, the periphery of the gas meter is sealed to restrict the flow of gas, so that the gas meter is in a stable environment during the detection process; by setting up a driving device and a connecting device, the air inlet and the air outlet of the gas meter are tightly connected to ensure the sealing of the interface; by setting up a gas injection detection device and a mobile detection device, gas is injected into the gas meter, and the air tightness of the gas meter is accurately judged by real-time monitoring of the sliding distance of the lower slider and monitoring of the air pressure on the inner wall of the gas meter by the detection head. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 This is a schematic diagram of the overall structure of an automatic gas tightness detection device for a gas meter;

[0070] Figure 2 This is a schematic diagram of the structure of a detection rack in an automatic gas meter air tightness detection device;

[0071] Figure 3 This is a schematic diagram of the structure of a clamping and fixing component in an automatic gas meter air tightness detection device;

[0072] Figure 4 This is a schematic diagram of the partial structure of an automatic gas tightness detection device for a gas meter;

[0073] Figure 5 This is a schematic diagram of the structure of a driving device and a connecting device in an automatic gas tightness detection device for a gas meter;

[0074] Figure 6 This is a schematic diagram of the structures of the gas injection detection device, the mobile detection device and the adjustment device in an automatic gas tightness detection device of a gas meter;

[0075] Figure 7 A gas meter air tightness automatic detection device Figure 6A schematic diagram of the enlarged structure at point A;

[0076] Figure 8 A gas meter air tightness automatic detection device Figure 6 A schematic diagram of the enlarged structure at point B;

[0077] In the figure: 1. Detection frame; 2. Conveying platform; 3. Gas meter; 4. Clamping and fixing assembly; 5. Driving device; 6. Connecting device; 7. Gas injection detection device; 8. Moving detection device; 9. Adjusting device; 11. Frame; 12. Main closing assembly; 13. First side closing assembly; 14. Second side closing assembly; 15. Load-bearing panel; 31. Air inlet; 32. Air outlet; 41. Sliding table; 42. Clamping slider; 51. Connecting frame; 52. Hydraulic shaft; 53. Shaft body; 61. Moving panel; 62. Connecting piece; 63. Locking and fixing assembly; 71. First slide rail; 72. Active slider; 73. First detection shaft; 74. Outer gas injection tube; 75, inner gas injection tube; 81, second slide rail; 82, passive slider; 83, second detection axis; 84, movable axis; 91, connecting plate; 92, drive housing; 93, adjusting shaft; 94, drive assembly; 95, transmission gear; 631, connecting ring; 632, sealing ring; 633, nut; 634, gear ring; 731, first upper slider; 732, first lower slider; 733, first compression spring; 741, gas injection port; 742, connecting ring; 743, first detection head; 751, sealing ring; 831, second upper slider; 832, second lower slider; 833, second compression spring; 841, second detection head. DETAILED DESCRIPTION

[0078] See also Figures 1 to 8 In an embodiment of the present invention, a gas meter air tightness automatic detection device includes:

[0079] A detection rack 1 and a conveying platform 2, wherein the conveying platform 2 is arranged horizontally and passes through the middle of the detection rack 1 transversely;

[0080] The gas meter 3 is provided on the conveying platform 2. An air inlet 31 and an air outlet 32 ​​are respectively provided at both ends of the top of the gas meter 3. The air inlet 31 and the air outlet 32 ​​are threaded structures.

[0081] The clamping and fixing assembly 4 is fixed on both sides of the conveying platform 2 and is located in the inner center of the detection frame 1. The clamping and fixing assembly 4 is provided with two symmetrically distributed sliding tables 41. The sliding tables 41 are fixed on both sides of the conveying platform 2, and a clamping slider 42 is provided on the top for sliding;

[0082] The driving device 5 is arranged at the top center of the detection frame 1;

[0083] A connecting device 6, the top of which is fixed to the bottom of the driving device 5, and the bottom of the connecting device 6 corresponds to the top of the gas meter 3;

[0084] A gas injection detection device 7 is provided on one side of the driving device 5 at the top of the detection frame 1;

[0085] The mobile detection device 8 is arranged on the top of the detection frame 1 and on the side of the driving device 5 away from the gas injection detection device 7;

[0086] Two adjusting devices 9 are symmetrically distributed and located inside the detection rack 1 , and are fixed to the bottom of the gas injection detection device 7 and the mobile detection device 8 .

[0087] In this embodiment, the detection frame 1 includes:

[0088] The frame 11 and the main sealing components 12 are symmetrically arranged on the front and back of the frame 11.

[0089] A first side closure assembly 13 is provided on the side of the frame 11 and is located above the input side of the conveying platform 2;

[0090] The second side sealing assembly 14 is provided on the side of the frame 11 opposite to the first side sealing assembly 13 and is located above the output side of the conveying platform 2;

[0091] The bearing panel 15 is fixed on the top of the frame 11 and is fixedly connected to the driving device 5 , the gas injection detection device 7 and the movement detection device 8 .

[0092] That is to say, when the conveying platform 2 conveys the gas meter 3 to the detection rack 1, the first side closing component 13 is opened, and after the gas meter 3 enters the frame 11, the first side closing component 13 and the second side closing component 14 are closed, and then the gas meter 3 is fixed by the clamping slider 42 of the clamping fixing component 4. After confirming that the gas meter 3 is fixed, the front main closing component 12 is closed, and the rear main closing component 12 is always in a closed state. At this time, the frame 11 is completely closed by the closing component to limit the gas flow inside the frame 11, effectively reducing the impact of temperature changes caused by gas flow on the gas meter 3, and making the gas meter 3 in a stable detection environment. When the detection of the gas meter 3 is completed, the first side closing component 13 and the second side closing component 14 are opened at the same time, and the gas meter 3 that has been detected is output while the new gas meter 3 to be detected is conveyed.

[0093] In this embodiment, the driving device 5 includes:

[0094] The connecting frame 51 is fixed at the top center of the detection frame 1 and passes through the top plane of the detection frame 1;

[0095] The hydraulic shaft 52 is fixed at the top center of the connecting frame 51;

[0096] The shaft body 53 is slidably disposed in the hydraulic shaft 52 , and the shaft body 53 passes through the center of the connecting frame 51 and is fixedly connected to the top of the connecting device 6 .

[0097] That is to say, driven by the hydraulic shaft 52, the connecting device 6 is driven to move up and down through the shaft body 53. When the gas meter 3 is fixed under the action of the clamping and fixing component 4, the hydraulic shaft 52 drives the shaft body 53 to extend downward, so that the connecting device 6 is fixedly connected to the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3. The air tightness of the gas meter 3 is tested by the gas injection detection device 7 and the movement detection device 8. After the test is completed, the hydraulic shaft 52 drives the shaft body 53 to contract, driving the connecting device 6 to separate from the gas meter 3.

[0098] In this embodiment, the connecting device 6 includes:

[0099] The movable panel 61 is located inside the detection frame 1 and is horizontally arranged above the conveying platform 2;

[0100] A connecting member 62 is fixed at the top center of the movable panel 61 and is used to connect the movable panel 61 and the shaft 53;

[0101] Two locking and fixing assemblies 63 are symmetrically arranged and fixed to the bottom of the movable panel 61. Each of the locking and fixing assemblies 63 corresponds to the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3. Driven by the shaft 53, the movable panel 61 moves downward through the connecting member 62, driving the locking and fixing assemblies 63 to move toward the position of the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3, and is fixed by the locking and fixing assemblies 63.

[0102] In this embodiment, the locking and fixing assembly 63 includes:

[0103] A connecting ring 631 is fixed to the bottom of the movable panel 61;

[0104] The sealing ring 632 is provided inside the connecting ring 631 and corresponds to the top of the air inlet 31 and the air outlet 32;

[0105] The nut 633 is rotatably mounted on the bottom of the connecting ring 631 , and its internal threads correspond to the external threads of the air inlet 31 and the air outlet 32 ​​;

[0106] The gear ring 634 is fixed on the outside of the nut 633 and is connected to the adjusting device 9 .

[0107] When the hydraulic shaft 52 drives the shaft body 53 to extend, the shaft body 53 drives the locking fixing assembly 63 to move downward through the movable panel 61 to fit the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3. When the bottom of the nut 633 fits the air inlet 31 and the air outlet 32 ​​respectively, the adjusting device 9 drives the nut 633 to rotate through the gear ring 634. At the same time, the shaft body 53 drives the movable panel 61 to move downward continuously, and then the air inlet 31 and the air outlet 32 ​​are fixed to the corresponding nuts 633 respectively. The air inlet 31 and the air outlet 32 ​​are connected, and the tops of the air inlet 31 and the air outlet 32 ​​are deeply inserted into the connecting ring 631 and fit with the sealing ring 632. Under the action of the sealing ring 632, the locking fixing component 63 and the air inlet 31 and the air outlet 32 ​​of the gas meter 3 are tightly connected, effectively ensuring the air tightness of the connection. After the inspection is completed, the adjusting device 9 drives the nut 633 to rotate in the opposite direction through the gear ring 634, and at the same time the shaft 53 drives the movable panel 61 to move upward until the connecting device 6 is separated from the gas meter 3.

[0108] In this embodiment, the gas injection detection device 7 includes:

[0109] The first slide rail 71 is vertically arranged and fixed on the top of the detection frame 1;

[0110] The active slider 72 is slidably disposed on the first slide rail 71 and is located above the detection rack 1;

[0111] A first detection shaft 73 passes through the driving device 1 and the connecting device 6, and the first detection shaft 73 is slidably connected to the driving device 5, and the first detection shaft 73 is fixedly connected to the connecting device 6;

[0112] An outer gas injection tube 74 and an inner gas injection tube 75, wherein the outer gas injection tube 74 is slidingly arranged outside the inner gas injection tube 75, and the outer gas injection tube 74 is slidingly arranged in the first detection shaft 73, and the upper part of the outer gas injection tube 74 is fixedly connected to the active slider 72, and the top of the inner gas injection tube 75 is fixedly connected to the external gas injection mechanism, and a sealing ring 751 corresponding to the outer gas injection tube 74 is provided on the inner side of the bottom, and the position of the inner gas injection tube 75 and the first detection shaft 73 is relatively fixed.

[0113] That is to say, under the action of the connecting device 6, the gas injection detection device 7 is fixedly connected to the gas inlet 31 of the gas meter 3. It should be noted that when the first detection shaft 73 moves downward or upward on the connecting frame 51 under the drive of the movable panel 61, the gas injection inner tube 75 follows the first detection shaft 73 to move, so that the position between the gas injection inner tube 75 and the first detection shaft 73 always remains in a relatively fixed state. Then, the active slider 72 moves downward on the first slide rail 71, and then, driven by the active slider 72, the gas injection outer tube 74 moves into the interior of the gas meter 3 through the gas inlet 31, and then pressurized gas is injected into the gas injection inner tube 75 through the external gas injection mechanism. The pressurized gas is transported to the interior of the gas meter 3 through the gas injection outer tube 74, and quickly fills the gas meter 3 from the middle of the gas meter 3. As the gas inside the gas meter 3 is gradually filled, the active slider 72 gradually drives the gas injection outer tube 74 to move upward until the gas injection outer tube 74 is connected to the sealing ring 751 on the gas injection inner tube 75, and the gas injection is stopped.

[0114] In this embodiment, the first detection axis 73 includes:

[0115] The first upper slider 731 is annular and fixed to the inner wall of the first detection shaft 73, and the gas injection outer tube 74 is slidably connected to the first upper slider 731;

[0116] The first lower slider 732 is annular and slidably disposed between the first detection shaft 73 and the gas injection outer tube 74;

[0117] The first compression spring 733 is fixed between the first upper slider 731 and the first lower slider 732 .

[0118] That is to say, pressurized gas is injected into the gas injection inner tube 75 through the external gas injection mechanism, and the pressurized gas is transported to the inside of the gas meter 3 through the gas injection outer tube 74, and quickly fills the gas meter 3 from the middle of the gas meter 3. As the gas inside the gas meter 3 is gradually filled, the pressurized gas inside the gas meter 3 lifts the first lower slider 732 and compresses the first compression spring 733, and then the active slider 72 gradually drives the gas injection outer tube 74 to move upward until the gas injection outer tube 74 is connected to the sealing ring 751 on the gas injection inner tube 75, and the gas injection is stopped. At this time, the position of the first lower slider 732 gradually stabilizes. If the sliding distance of the first lower slider 732 driven by the first compression spring 733 exceeds the error range, the gas meter 3 is not air-tight. If the sliding distance of the first lower slider 732 driven by the first compression spring 733 is within the error range, the gas meter 3 is better air-tight.

[0119] In this embodiment, the gas injection outer tube 74 includes:

[0120] The gas injection port 741 is provided at the bottom center of the gas injection outer tube 74;

[0121] The connecting ring 742 is fixedly connected to the gas injection port 741, is located inside the gas injection outer tube 74, and corresponds to the sealing ring 751;

[0122] The first detection head 743 is fixed outside the gas injection port 741 .

[0123] That is to say, when pressurized gas is injected into the gas injection inner tube 75 through the external gas injection mechanism, the pressurized gas flows to the gas injection port 741 through the connecting ring 742 at the bottom of the gas injection outer tube 74, and the pressurized gas is transported to the inside of the gas meter 3 through the gas injection port 741. As the gas inside the gas meter 3 is gradually filled, the active slider 72 gradually drives the gas injection outer tube 74 to move upward until the connecting ring 742 inside the gas injection outer tube 74 is connected to the sealing ring 751 on the gas injection inner tube 75, closing the connecting ring 742 and stopping gas injection. While the internal air tightness of the gas meter 3 is detected by the first lower slider 732, the internal air pressure of the gas meter 3 is monitored in real time by the first detection head 743. Through double detection, the air tightness of the gas meter 3 is accurately judged.

[0124] In this embodiment, the movement detection device 8 includes:

[0125] The second slide rail 81 is vertically arranged, passes through the carrying panel 15, and is fixedly connected to the carrying panel 15;

[0126] The passive slider 82 is slidably disposed on the second slide rail 81 and is located above the bearing panel 15;

[0127] The second detection shaft 83 passes through the connecting frame 51 and the connecting device 6. The second detection shaft 83 is slidably connected to the connecting frame 51, and the bottom of the second detection shaft 83 corresponds to the connecting ring 631;

[0128] The movable shaft 84 is slidably disposed inside the second detection shaft 83 , and the top is fixedly connected to the passive slider 82 , and the bottom is provided with a second detection head 841 .

[0129] That is to say, under the action of the connecting device 6, the mobile detection device 8 is fixedly connected to the gas outlet 32 ​​of the gas meter 3. As the gas injection detection device 7 continues to inject pressurized gas into the gas meter 3, the movable shaft 84 is lifted up and slides upward in the second detection shaft 83, thereby driving the passive slider 82 to slide upward on the second slide rail 81.

[0130] In this embodiment, the second detection axis 83 includes:

[0131] The second upper slider 831 is annular and fixed to the inner wall of the second detection shaft 83, and the movable shaft 84 is slidably connected to the second upper slider 831;

[0132] The second lower slider 832 is annular and slidably disposed on the inner wall of the second detection shaft 83 and fixedly connected to the outer wall of the moving shaft 84;

[0133] The second compression spring 833 is fixed between the second upper slider 831 and the second lower slider 832 .

[0134] As the gas injection detection device 7 continues to inject pressurized gas into the gas meter 3, the movable shaft 84 is lifted up, and at the same time, the second lower slider 832 slides upward in the second detection shaft 83 synchronously with the movable shaft 84, compressing the second compression spring 833. After the gas injection is completed, the second compression spring 833 rebounds and resets, and the gas inside the gas meter 3 continues to lift the second lower slider 832. Subsequently, the air tightness of the gas meter 3 is judged by the moving range of the second lower slider 832. Since the second lower slider 832 moves synchronously with the movable shaft 84, the air tightness of the gas meter 3 can also be judged by the position change of the passive slider 82 on the second slide rail 81, and the second detection head 841 at the bottom of the movable shaft 84 monitors the internal air pressure of the gas meter 3 in real time.

[0135] In this embodiment, the regulating device 9 includes:

[0136] A connecting plate 91 is fixed to the bottom of the gas injection detection device 7 or the mobile detection device 8;

[0137] The driving box 92 is fixed to the side of the connecting plate 91;

[0138] The adjusting shaft 93 is vertically arranged and fixedly connected to the driving box 92;

[0139] A drive assembly 94 is fixed to the bottom of the adjustment shaft 93;

[0140] The transmission gear 95 is fixed to the bottom of the driving assembly 94 and meshes with the gear ring 634 in the connecting device 6.

[0141] That is to say, when the locking and fixing assembly 63 is in fit with the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3, that is, when the bottom of the nut 633 is respectively in fit with the air inlet 31 and the air outlet 32, the driving box 92 controls the movement of the adjusting shaft 93 so that the transmission gear 95 on the driving assembly 94 remains engaged with the gear ring 634 outside the nut 633. Driven by the driving assembly 94, the transmission gear 95 drives the nut 633 to rotate through the gear ring 634. At the same time, the shaft 53 drives the movable panel 61 to move downward continuously, and then the air inlet 31 and the air outlet 32 ​​are fixedly connected to the corresponding nuts 633 respectively. After the detection is completed, the driving assembly 94 drives the gear ring 634 to reverse through the transmission gear 95, and then drives the nut 633 to rotate in the opposite direction. At the same time, the shaft 53 drives the movable panel 61 to move upward, and the driving box 92 controls the adjusting shaft 93 to move upward until the connecting device 6 is detached from the gas meter 3.

[0142] During the specific implementation, the gas meter 3 is first placed on the conveying platform 2 at intervals. Driven by the conveying platform 2, the gas meter 3 is conveyed to the inside of the detection rack 1. After the gas meter 3 enters the detection rack 1, the first side closing assembly 13 and the second side closing assembly 14 on both sides of the frame 11 close the frame 11, and then the gas meter 3 is clamped and fixed by the clamping slider 42 of the clamping fixing assembly 4. Then the hydraulic shaft 52 drives the shaft body 53 to extend, and the shaft body 53 drives the locking fixing assemblies 63 on both sides to move down through the movable panel 61 to fit the air inlet 31 and the air outlet 32 ​​at the top of the gas meter 3, and at the same time drives the first detection shaft 73 and the second detection shaft 83 on both sides to move up and down on the connecting frame 51, and then when the bottom of the nut 633 is respectively in contact with the air inlet 31 and the air outlet When the air port 32 is in contact with each other, the adjusting device 9 drives the nut 633 to rotate through the gear ring 634, and at the same time, the shaft 53 drives the movable panel 61 to move downward continuously, so that the air inlet 31 and the air outlet 32 ​​are fixedly connected with the corresponding nuts 633 respectively, and the tops of the air inlet 31 and the air outlet 32 ​​are deeply embedded in the connecting ring 631 and fit with the sealing ring 632. Then, the active slider 72 moves downward on the first slide rail 71, thereby driving the outer gas injection tube 74 to move into the interior of the gas meter 3 through the air inlet 31, so that the connecting ring 742 on the outer gas injection tube 74 is separated from the sealing ring 751 on the inner gas injection tube 75, and then pressurized gas is injected into the inner gas injection tube 75 through the external gas injection mechanism, and the pressurized gas is output to the interior of the gas meter 3 through the gas injection port 741 of the outer gas injection tube 74. The gas meter 3 is quickly filled from the middle of the gas meter 3. As the gas inside the gas meter 3 is gradually filled, the active slider 72 gradually drives the gas injection outer tube 74 to move upward. Affected by the internal air pressure of the gas meter 3, the first lower slider 732 inside the first detection shaft 73 moves upward to compress the first compression spring 733. At the same time, the second lower slider 832 inside the second detection shaft 83 moves upward synchronously with the moving shaft 84 to compress the second compression spring 833. As the gas injection outer tube 74 moves upward, the connecting ring 742 inside the gas injection outer tube 74 is connected to the sealing ring 751 on the gas injection inner tube 75, and the gas injection is stopped. At this time, the internal air pressure of the gas meter 3 gradually stabilizes, and the positions of the first lower slider 732 and the second lower slider 832 are determined. Subsequently, by monitoring the first The air tightness of the gas meter 3 is judged by the moving range of the lower slider 732 and the second lower slider 832 and the detection data of the internal air pressure of the gas meter 3 by the first detection head 743 and the second detection head 841. If the sliding distance driven by the compression springs of the first lower slider 732 and the second lower slider 832 exceeds the error range or the air pressure value detected by the detection head deviates greatly from the initial value, the air tightness of the gas meter 3 is poor. If the sliding distance of the first lower slider 732 and the second lower slider 832 driven by the compression springs is within the error range and the air pressure value detected by the detection head is within the specified error, the air tightness of the gas meter 3 is good. After the detection is completed, the adjustment device 9 drives the nut 633 to rotate in the opposite direction through the gear ring 634, and at the same time the shaft 53 drives the movable panel 61 to move upward.Until the connecting device 6 is separated from the gas meter 3, then the side sealing components on both sides of the detection rack 1 are opened, and the gas meter 3 that has completed the detection is output while the new gas meter 3 to be detected is delivered to perform continuous detection.

[0143] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gas meter air tightness automatic detection device, characterized by: include: A detection frame (1) and a conveying platform (2), wherein the conveying platform (2) is arranged horizontally and passes through the middle of the detection frame (1) transversely; a gas meter (3) is arranged on the conveying platform (2); a clamping and fixing assembly (4) is fixed on both sides of the conveying platform (2) and is located in the inner center of the detection frame (1); a driving device (5) is arranged at the top center of the detection frame (1); a connecting device (6) is fixed at the bottom of the driving device (5), and the bottom of the connecting device (6) corresponds to the top of the gas meter (3); a gas injection detection device (7) is arranged on one side of the driving device (5) at the top of the detection frame (1); a moving detection device (8) is arranged on the side of the driving device (5) at the top of the detection frame (1) away from the gas injection detection device (7); an adjusting device (9) is symmetrically distributed with two adjusting devices, located in the inner part of the detection frame (1), and fixed at the bottom of the gas injection detection device (7) and the moving detection device (8); the detection frame (1) The invention comprises a frame (11) and a main sealing component (12), wherein two groups of main sealing components (12) are symmetrically distributed on the frame (11); the gas injection detection device (7) comprises: a first detection shaft (73) which passes through the driving device (5) and the connecting device (6), and the first detection shaft (73) is slidably connected to the driving device (5), and the first detection shaft (73) is fixedly connected to the connecting device (6); a gas injection outer tube (74) and a gas injection inner tube (75), wherein the gas injection inner tube (75) is provided with an outer gas injection tube (74) which is slidingly arranged outside the first detection shaft (73); the first detection shaft (73) includes a first lower slider (732) which is annular and slidingly arranged between the first detection shaft (73) and the gas injection tube (74); the gas injection tube (74) includes: a gas injection port (741) which is arranged at the bottom center of the gas injection tube (74); and a first detection head (743) which is fixed to the outside of the gas injection port (741); The driving device (5) comprises: a connecting frame (51), fixed at the top center of the detection frame (1) and passing through the top plane of the detection frame (1); a hydraulic shaft (52), fixed at the top center of the connecting frame (51); a shaft body (53), slidably arranged in the hydraulic shaft (52), and the shaft body (53) passes through the center of the connecting frame (51) and is fixedly connected to the top of the connecting device (6); the mobile detection device (8) comprises: a second detection shaft (83), passing through the connecting frame (51) and the connecting device (6), the second detection shaft (83) being slidably connected to the connecting frame (51); a moving shaft (84), slidably arranged inside the second detection shaft (83), and having a second detection head (841) at the bottom; the second detection shaft (83) comprises: a second lower slider (832), annular, slidably arranged on the inner wall of the second detection shaft (83), and fixedly connected to the outer wall of the moving shaft (84); The connecting device (6) includes: a movable panel (61), located inside the detection frame (1) and horizontally arranged above the conveying platform (2); a connecting member (62), fixed at the top center of the movable panel (61), used to connect the movable panel (61) and the shaft (53); two locking and fixing components (63) symmetrically distributed and fixed at the bottom of the movable panel (61), and the locking and fixing components (63) respectively correspond to the air inlet (31) and the air outlet (32) at the top of the gas meter (3); The locking and fixing assembly (63) comprises: a connecting ring (631) fixed to the bottom of the movable panel (61); a sealing ring (632) arranged inside the connecting ring (631) and corresponding to the top of the air inlet (31) and the air outlet (32); a nut (633) rotatably arranged at the bottom of the connecting ring (631), and having an internal thread corresponding to the external thread of the air inlet (31) and the air outlet (32); and a gear ring (634) fixed to the outside of the nut (633), and the gear ring (634) is connected to the adjustment device (9).

2. The automatic gas tightness detection device of a gas meter according to claim 1, characterized in that: The gas meter (3) is provided with an air inlet (31) and an air outlet (32) at both ends of its top, and the air inlet (31) and the air outlet (32) are threaded structures; the clamping and fixing assembly (4) is provided with two symmetrically distributed sliding tables (41), the sliding tables (41) are fixed on both sides of the conveying platform (2), and a clamping slider (42) is provided on the top for sliding; the detection rack (1) further includes: a first side closing assembly (13), which is arranged on the side of the frame (11) and is located above the input side of the conveying platform (2); a second side closing assembly (14), which is arranged on a side of the frame (11) opposite to the first side closing assembly (13) and is located above the output side of the conveying platform (2); and a bearing panel (15), which is fixed on the top of the frame (11) and is fixedly connected to the driving device (5), the gas injection detection device (7) and the mobile detection device (8).

3. The automatic gas tightness detection device of a gas meter according to claim 1, characterized in that: The gas injection detection device (7) further comprises: a first slide rail (71) vertically arranged and fixed on the top of the detection frame (1); an active slider (72) slidably arranged on the first slide rail (71) and located above the detection frame (1); the upper portion of the gas injection outer tube (74) is fixedly connected to the active slider (72); the top of the gas injection inner tube (75) is fixedly connected to the external gas injection mechanism; a sealing ring (751) corresponding to the gas injection outer tube (74) is provided on the inner side of the bottom; and the position of the gas injection inner tube (75) and the first detection axis (73) are relatively fixed.

4. The automatic gas tightness detection device of a gas meter according to claim 1, characterized in that: The first detection shaft (73) further comprises: a first upper slider (731) in an annular shape, fixed on the inner wall of the first detection shaft (73), and the gas injection outer tube (74) is slidably connected to the first upper slider (731); and a first compression spring (733) fixed between the first upper slider (731) and the first lower slider (732).

5. The automatic gas tightness detection device of a gas meter according to claim 3, characterized in that: The gas injection outer tube (74) further comprises: a communication ring (742), fixedly connected to the gas injection port (741), located inside the gas injection outer tube (74), and corresponding to the sealing ring (751).

6. The automatic gas tightness detection device of a gas meter according to claim 1, characterized in that: The movement detection device (8) further comprises: a second slide rail (81) vertically arranged, penetrating the bearing panel (15) and fixedly connected to the bearing panel (15); a passive slider (82) slidably arranged on the second slide rail (81) and located above the bearing panel (15); the top of the movement shaft (84) is fixedly connected to the passive slider (82), and the bottom of the second detection shaft (83) corresponds to the connecting ring (631).

7. The automatic gas tightness detection device of claim 6, characterized in that: The second detection shaft (83) further includes: a second upper slider (831) in an annular shape, fixed on the inner wall of the second detection shaft (83), and the movable shaft (84) is slidably connected to the second upper slider (831); and a second compression spring (833) fixed between the second upper slider (831) and the second lower slider (832).

8. The automatic gas tightness detection device of a gas meter according to claim 1, characterized in that: The regulating device (9) comprises: a connecting plate (91) fixed to the bottom of the gas injection detection device (7) or the mobile detection device (8); a driving box (92) fixed to the side of the connecting plate (91); an regulating shaft (93) vertically arranged and fixedly connected to the driving box (92); a driving assembly (94) fixed to the bottom of the regulating shaft (93); and a transmission gear (95) fixed to the bottom of the driving assembly (94) and meshing with a gear ring (634) in the connecting device (6).

Images