A LORA meter testing device and testing method thereof

Abstract

The present application relates to the field of testing equipment, and in particular to a LORA meter testing device and a testing method thereof, comprising a workbench and a body fixedly mounted on the top side of the workbench, a cylinder fixedly mounted on the body, a lifting plate fixedly mounted on the piston rod of the cylinder, pipe heads mounted on both ends of the lifting plate, an air inlet pipe connected between one pipe head and the body, an air outlet pipe connected between the other pipe head and the body, a lifting sleeve provided on the pipe head sleeve, a guide rod mounted on the workbench, the guide rod slidingly passing through the wall of the lifting sleeve in the height direction, a first limiting ring provided on the threaded sleeve of the guide rod, a support ring and a sealing airbag mounted inside the lifting sleeve, a first pressure ring mounted on the pipe head, a control mechanism mounted on the support ring, the control mechanism used to control the expansion or contraction of the sealing airbag, the sealing airbag used to expand and seal around the LORA meter joint. The present application has the effect of improving the accuracy of the LORA meter sealing test.

Description

Technical Field

[0001] The present application relates to the field of testing equipment, and in particular to a LORA meter testing device and a testing method thereof. Background Art

[0002] With the rapid development of Internet of Things technology, meters based on the LoRaWAN protocol that can communicate remotely are increasingly used in smart city construction due to their low power consumption and long transmission distance. Currently, the LORA meters on the market are mainly used for data collection and monitoring of public utilities such as water, electricity, gas, and heat.

[0003] For the LORA meter used for gas metering, the sealing performance test needs to be carried out after the LORA meter is produced. The test device generally includes a workbench and a body fixedly installed on the top side of the workbench. The body is fixedly installed with a cylinder, and the cylinder is connected to two pipe heads. An air inlet pipe is connected between one pipe head and the body, and an air outlet pipe is connected between the other pipe head and the body. The LORA meter is placed on the workbench. After the cylinder drives the pipe head down, it squeezes against the LORA meter joint, and the pipe head and the LORA meter joint are sealed by a sealing ring. After that, a valve and an air pump are built into the body. The body blocks the air outlet pipe through the valve, and the air pump supplies air to the air inlet pipe. The gas enters the inside of the LORA meter from the air inlet pipe and the pipe head. The body detects the air pressure of the air inlet pipe. After the air pressure inside the air inlet pipe reaches the preset threshold, the body closes the air pump and the valve, thereby blocking the air inlet pipe and maintaining the pressure. The position where the body detects the air pressure inside the air inlet pipe is still connected to the inside of the LORA meter, so as to facilitate the detection of the air pressure inside the LORA meter. When the LORA meter leaks, the air pressure detected by the body will decrease and the sealing of the LORA meter will fail; otherwise, the sealing of the LORA meter is good.

[0004] In view of the above-mentioned related technologies, the LORA meter for measuring gas has an upper shell and a lower shell, and a sealing ring is provided between the upper shell and the lower shell for sealing, and the LORA meter joint is located on the top side of the upper shell. When testing the LORA meter, the pipe head needs to be pressed against the joint, thereby driving the upper shell to further press against the lower shell, thereby increasing the sealing performance of the LORA meter. When in use, the LORA meter is installed on the wall, which does not further press the upper shell and the lower shell, that is, the sealing performance between the upper shell and the lower shell during use is smaller than that during testing, thereby reducing the accuracy of the LORA meter sealing test. Summary of the invention

[0005] In order to improve the accuracy of the LORA meter sealing test, the present application provides a LORA meter testing device and a testing method thereof.

[0006] The present application provides a LORA meter testing device and a testing method thereof, which adopts the following technical solutions:

[0007] A LORA meter testing device comprises a workbench and a body fixedly mounted on the top side of the workbench, the body being fixedly mounted with a cylinder which can be extended and retracted in a height direction, the piston rod of the cylinder being fixedly mounted with a lifting plate, both ends of the lifting plate being mounted with pipe heads, an air inlet pipe being connected between one of the pipe heads and the body, an air outlet pipe being connected between the other of the pipe heads and the body, a lifting sleeve being provided on the pipe head, a guide rod being mounted on the workbench, the guide rod being slidably penetrated through the cylinder wall of the lifting sleeve in a height direction, a first limiting ring being threadedly mounted on the guide rod, a support ring and a sealing airbag being mounted inside the lifting sleeve, a first pressure ring being mounted on the pipe head, the sealing airbag, the support ring and the first pressure ring being arranged in sequence from bottom to top, a control mechanism being mounted on the support ring, the control mechanism being used to control the expansion or contraction of the sealing airbag, the sealing airbag being used to expand and seal on the peripheral side of a LORA meter joint.

[0008] By adopting the above technical solution, the LORA meter is placed on the workbench, the joint on the top side of the LORA meter is aligned with the pipe head, and then the lifting sleeve is pushed down to abut against the first limit ring. The sealing airbag is used to expand and seal the circumference of the LORA meter joint, and the circumference has an inner circumference side and an outer circumference side.

[0009] If the sealing airbag expands and seals on the inner circumference of the LORA meter joint, the sealing airbag enters the joint. The cylinder is started to drive the lifting plate down, allowing the tube head to be inserted into the joint. Then the control mechanism controls the sealing airbag to expand, and the sealing airbag expands to block the space between the joint and the tube head, thereby facilitating the inflation of the LORA meter.

[0010] If the sealing airbag expands and seals on the outer peripheral side of the LORA meter joint, the sealing airbag is between the outer peripheral side of the joint and the inner wall of the lifting sleeve. The start cylinder drives the lifting plate down, and the lifting plate drives the pipe head down, so that the first pressure ring presses the support ring to seal, and the control mechanism controls the sealing airbag to expand. After the sealing airbag expands, it blocks the space between the joint and the lifting sleeve, thereby facilitating the inflation of the LORA meter.

[0011] Start the machine, block the air outlet pipe, and supply air to the LORA meter through the air inlet pipe and the pipe head. After the air pressure inside the LORA meter reaches the preset threshold, the machine blocks the air inlet pipe to maintain the pressure. During the pressure maintenance period, the machine detects the air pressure inside the LORA meter. When the LORA meter leaks, the air pressure detected by the machine will decrease, and the sealing of the LORA meter will fail; otherwise, the sealing of the LORA meter is good, thus completing the LORA meter sealing test. After the test is completed, the machine opens the air outlet pipe, and the gas inside the LORA meter is discharged from the air outlet pipe. Then the cylinder rises to reset.

[0012] The sealing airbag is inflated around the LORA meter to seal, thereby reducing the pressure on the LORA from top to bottom, thereby improving the accuracy of the LORA meter sealing test.

[0013] Optionally, the control mechanism includes an elastic ring, a sealing ring, a pressure rod and a second pressure ring. The elastic ring is fixedly sleeved on the support ring, the circumferential side of the elastic ring is fixedly connected to the inner wall of the lifting sleeve, the elastic ring is radially bent, the sealing ring is fixedly installed on the top side of the support ring, one end of the pressure rod is connected to the support ring, and the other end of the pressure rod is fixedly connected to the second pressure ring, and the second pressure ring is used to extrude and seal the airbag.

[0014] By adopting the above technical solution, the setting of the elastic ring places the support ring connected to the lifting sleeve, and at the same time facilitates the lifting and moving of the support ring inside the lifting sleeve. After the cylinder drives the pipe head down through the lifting plate, the first pressure ring squeezes the sealing ring, thereby driving the support ring to move downward. The support ring drives the second pressure ring to squeeze the sealing airbag through the pressure rod, thereby facilitating the control of the expansion of the sealing airbag. After the cylinder drives the pipe head up through the lifting plate, the first pressure ring and the support ring move away from each other, and the sealing airbag recovers and drives the second pressure ring, the pressure rod and the support ring to move upward, thereby facilitating the control of the contraction of the sealing airbag.

[0015] Optionally, a third pressure ring is arranged between the support ring and the second pressure ring, the pressure rod slides through the third pressure ring, the third pressure ring is fixedly mounted with a first slider, the outer wall of the tube head is provided with a first slide groove for the first slider to pass through, the first slide groove is gradually lifted and inclined along the circumference of the tube head, there are two third pressure rings, one of the third pressure rings is used to press the bottom side of the support ring, and the other third pressure ring is used to press the top side of the second pressure ring, a telescopic groove is provided on the bottom side of the support ring, the end of the pressure rod away from the second pressure ring is telescopically penetrated in the telescopic groove, and the tube head is rotatably mounted on the lifting plate.

[0016] By adopting the above technical solution, after the second pressure ring presses the sealing airbag, the tube head is rotated, and the third pressure ring is blocked by the pressure rod and cannot rotate, so that the first slider slides along the first slide groove, and then the two third pressure rings move in opposite directions. After the two third pressure rings move in opposite directions, one third pressure ring presses the bottom side of the support ring, so that the third pressure ring and the first pressure ring clamp the support ring for sealing, thereby reducing the possibility of the connection between the support ring and the elastic ring breaking after the support ring is squeezed by the first pressure ring. The other third pressure ring presses the top side of the second pressure ring, thereby driving the second pressure ring to further press the sealing airbag, thereby improving the sealing performance of the sealing airbag.

[0017] Optionally, the lifting plate is provided with a rotating hole for the pipe head to pass through, a second slider is fixedly installed on the inner wall of the rotating hole, and a second sliding groove is provided on the outer wall of the pipe head for the second slider to slide, and the second sliding groove is gradually lifted and inclined along the circumference of the pipe head.

[0018] By adopting the above technical solution, after the cylinder drives the lifting plate to descend, the pipe head descends with the lifting plate. When the first pressure ring abuts against the support ring and the second pressure ring abuts against the sealing airbag, the resistance of the pipe head descending with the lifting plate increases, so that the pipe head stops descending and the lifting plate continues to descend. The second slider cooperates with the second slide groove to facilitate driving the pipe head to rotate, so that the two third pressure rings move in opposite directions and then press together.

[0019] Optionally, the tube head is used to insert the LORA meter joint, the sealing airbag enters the interior of the LORA meter joint for sealing, the control mechanism includes an air storage bag and an air guide tube, the air storage bag is fixedly installed on the top side of the support ring, the air guide tube is connected to the air storage bag and the sealing airbag, and the air guide tube is fixedly passed through the support ring.

[0020] By adopting the above technical solution, after the cylinder drives the pipe head down, the first pressure ring presses the air storage bag, and the gas inside the air storage bag enters the sealing air bag from the air guide tube, so as to facilitate the control of the expansion of the sealing air bag. After the cylinder drives the pipe head up, the first pressure ring moves away from the air storage bag, and the gas inside the sealing air bag enters the air storage bag from the air guide tube, so as to facilitate the control of the contraction of the sealing air bag.

[0021] Optionally, a third slider is fixedly installed on the inner wall of the first pressure ring, and a third sliding groove for the third slider to slide is opened on the outer wall of the tube head, and the third sliding groove is arranged along the height direction. A connecting rod is fixedly connected between the lifting plate and the first pressure ring, and the inner wall of the support ring is fixedly connected to the outer wall of the tube head.

[0022] By adopting the above technical solution, after the cylinder drives the lifting plate to descend and the tube head is inserted into the LORA meter, the tube head stops descending. Through the cooperation of the third slider and the third slide groove, the first pressure ring continues to descend and squeezes the air storage bag, thereby expanding the sealing air bag. When the sealing air bag expands, the tube head is inserted into the LORA meter joint and stops lifting, thereby reducing the friction between the tube head and the LORA meter joint of the sealing air bag, thereby increasing the service life of the sealing air bag.

[0023] Optionally, a reinforcement ring is fixedly mounted on the top side of the sealing airbag, and the air guide tube is fixedly passed through the reinforcement ring.

[0024] By adopting the above technical solution, after the LORA meter is inflated, the air pressure inside the LORA meter is high, thereby applying thrust to the sealing airbag. The reinforcing ring is used for support, thereby reducing the sealing airbag from sliding out of the LORA meter joint due to the thrust.

[0025] Optionally, the lifting plate includes a sleeve, a mounting plate, a limit rod and a second limit ring, there are two of each of the mounting plate, the limit rod and the second limit ring, the outer wall of the sleeve is fixedly connected to the piston rod of the cylinder, the mounting plate is passed through one end of the sleeve, the mounting plate is connected to the pipe head, the limit rod is fixedly installed on the top side of the mounting plate, the top side of the sleeve is provided with a limit opening for the limit rod to slide, the second limit ring is threadedly sleeved on the limit rod, the bottom end of the guide rod is fixedly installed with a dovetail block, the top side of the workbench is provided with a dovetail groove for the dovetail block to slide, and the dovetail groove is arranged along the telescopic direction of the lifting plate.

[0026] By adopting the above technical solution, according to the distance between the two joints on the top side of the LORA meter, the mounting plate is pulled to extend and retract on the sleeve, thereby facilitating the adjustment of the spacing between the two tube heads, thereby facilitating the application of the test device to LORA meters of different sizes.

[0027] Optionally, a positioning block is fixedly installed on the top side of the workbench, and the positioning block is used for the side wall of the LORA meter to abut against. The dovetail block is provided with a positioning rod, and the positioning rod thread passes through the part of the dovetail block located outside the dovetail groove, and one end of the positioning rod is used to abut against one side of the LORA meter.

[0028] By adopting the above technical solution, after the LORA meter is placed on the workbench, one side of the LORA meter is abutted against the positioning block, and then the positioning rod is abutted against the two sides of the LORA meter, so as to facilitate the positioning of the LORA meter and then facilitate the alignment of the pipe head and the LORA meter joint.

[0029] A LORA meter testing method comprises the following steps:

[0030] Connect the two connectors of the LORA meter to the test device;

[0031] The test device supplies gas to one joint of the LORA meter and blocks the other joint;

[0032] When the air pressure inside the LORA meter reaches the preset threshold, the two joints of the LORA meter are blocked to maintain the pressure;

[0033] When the pressure holding time of the LORA table reaches the preset time, if the pressure inside the LORA table decreases, the LORA table is unqualified; if the pressure inside the LORA table remains unchanged, the LORA table is qualified.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] Place the LORA meter on the workbench, move the lifting sleeve to cover the LORA meter joint, let the sealing airbag cover the LORA meter joint, and the cylinder drives the tube head to descend through the lifting plate, so that the first pressure ring presses the support ring to seal. The pressure of the first pressure ring on the support ring will drive the lifting sleeve to press the first limit ring, thereby reducing the downward pressure applied to the LORA meter, and then the control mechanism drives the sealing airbag to expand. After the sealing airbag expands, it blocks the space between the outer peripheral side of the LORA meter joint and the inner wall of the lifting sleeve. The sealing airbag expands on the peripheral side of the LORA meter joint to seal, thereby reducing the downward pressure applied to the LORA meter. By reducing the downward pressure applied to the LORA meter, the situation where the upper shell is compressed and presses the lower shell is reduced, thereby improving the accuracy of the LORA meter sealing test.

[0036] When the cylinder drives the pipe head down through the lifting plate and the first pressure ring presses the support ring for sealing, the peripheral side of the support ring is connected to the lifting sleeve through the elastic ring, so that the support ring moves downward after being squeezed by the first pressure ring, and the support ring drives the second pressure ring to squeeze the sealing airbag through the pressure rod, so as to facilitate the control of the expansion of the sealing airbag. After the test is completed, the cylinder drives the pipe head up through the lifting plate, and the first pressure ring moves away from the support ring after the pipe head rises. The support ring drives the second pressure ring to reduce the pressing force on the sealing airbag through the pressure rod, so as to facilitate the contraction and recovery of the sealing airbag.

[0037] When the cylinder drives the tube head to descend through the lifting plate and the first pressure ring presses the support ring, the resistance of the tube head to descent increases, and the lifting plate and the tube head move relative to each other through the cooperation of the second slider and the second slide groove, and the tube head rotates. When the tube head rotates, the first slider cooperates with the first slide groove, and the pressure rod limits the rotation of the third pressure ring, so that the two third pressure rings move in opposite directions, and one third pressure ring presses the bottom side of the support ring, and the third pressure ring and the first pressure ring clamp the support ring, which improves the sealing performance while reducing the distance that the support ring moves downward after being squeezed by the first pressure ring, thereby reducing the separation of the support ring from the elastic ring after the support ring is squeezed, and the other third pressure ring will drive the second pressure ring to further press the sealing airbag, thereby improving the sealing performance of the sealing airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of an existing LORA meter used for gas metering;

[0039] Figure 2 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0040] Figure 3 is a schematic structural diagram of a cylinder and a lifting plate of Example 1 of the present application;

[0041] Figure 4 yes Figure 2A magnified view at point A;

[0042] Figure 5 This is a schematic diagram of the structure between the pipe head and the lifting sleeve in Example 1 of the present application;

[0043] Figure 6 yes Figure 5 Sectional view at AA;

[0044] Figure 7 It is a partial structural diagram of Example 2 of the present application;

[0045] Figure 8 This is a schematic diagram of the structure between the pipe head and the lifting sleeve in Example 2 of the present application.

[0046] Fig. 9 yes Figure 8 Cross-sectional view at BB;

[0047] Fig.10 is an exploded view between the lifting plate and the pipe head of Example 2 of the present application;

[0048] Fig.11 It is a partial structural diagram of Example 3 of the present application;

[0049] Fig.12 yes Fig.11 Cross-sectional view at CC;

[0050] Fig.13 yes Fig.12 Enlarged view at B.

[0051] Explanation of the reference numerals: 1. upper shell; 2. lower shell; 3. joint; 4. metering panel; 5. workbench; 6. machine body; 7. cylinder; 8. first limiting ring; 9. lifting plate; 91. sleeve; 92. mounting plate; 93. limiting rod; 94. second limiting ring; 10. limiting opening; 11. pipe head; 12. air inlet pipe; 13. air outlet pipe; 14. lifting sleeve; 15. guide rod; 16. dovetail block; 17. dovetail groove; 18. positioning block; 19. positioning Rod; 20, support ring; 21, sealing airbag; 22, first pressure ring; 23, control mechanism; 231, elastic ring; 232, sealing ring; 233, pressure rod; 234, second pressure ring; 235, air storage bag; 236, air guide tube; 24, third pressure ring; 25, first slider; 26, second slider; 27, third slider; 28, first slide groove; 29, second slide groove; 30, third slide groove; 31, telescopic groove; 32, rotating hole; 33, reinforcement ring. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1-13 This application is described in further detail.

[0053] Example 1

[0054] The embodiments of the present application disclose a LORA meter testing device and a testing method thereof.

[0055] Reference Figure 1 The existing LORA meter for measuring the amount of gas used generally includes an upper shell 1 and a lower shell 2, and the upper shell 1 is fixedly installed on the top side of the lower shell 2. A sealing ring is used to seal between the upper shell 1 and the lower shell 2. Two connectors 3 are fixedly installed on the top side of the upper shell 1. A metering panel 4 that integrates the LoRaWAN protocol and can communicate remotely is fixedly installed on one side of the upper shell 1.

[0056] Reference Figure 2 , Figure 3 A LORA meter testing device includes a workbench 5 and a body 6 fixedly mounted on the top side of the workbench 5. The body 6 is fixedly mounted with a cylinder 7 that is telescopic in the height direction, and the cylinder 7 is provided with a lifting plate 9, which includes a sleeve 91, a mounting plate 92, a limiting rod 93 and a second limiting ring 94. The middle part of the outer top wall of the sleeve 91 is fixedly connected to the piston rod of the cylinder 7, so that the cylinder 7 can drive the sleeve 91 to rise and fall.

[0057] There are two mounting plates 92, two limiting rods 93 and two second limiting rings 94, and they correspond one to one. One mounting plate 92 is inserted through one end of the sleeve 91, and the other mounting plate 92 is inserted through the other end of the sleeve 91. One end of the limiting rod 93 is fixedly mounted on the top side of the mounting plate 92, and a limiting opening 10 is provided on the top side of the sleeve 91 for the limiting rod 93 to slide. The second limiting ring 94 is threadedly sleeved on the limiting rod 93. Pull the mounting plate 92 to slide along the length direction of the sleeve 91, so as to facilitate the adjustment of the length of the mounting plate 92 extending out of the sleeve 91. After adjusting the length of the mounting plate 92 extending out of the sleeve 91, screw the second limiting ring 94 into the limiting rod 93, so as to facilitate the fixing of the mounting plate 92.

[0058] Reference Figure 4 , the ends of the two mounting plates 92 that are away from each other are fixedly mounted with a pipe head 11, and the pipe head 11 is arranged vertically. An air inlet pipe 12 is connected between the top of one pipe head 11 and the machine body 6, and an air outlet pipe 13 is connected between the other pipe head 11 and the machine body 6. The machine body 6 is built with an air pressure sensor, an air pump and a valve. The air inlet pipe 12 and the air outlet pipe 13 are both connected to a valve, and the air pressure sensor and the air pump are both connected to the air inlet pipe 12, and the position of the air pressure sensor on the air inlet pipe 12 is on the side of the valve away from the air pump.

[0059] The LORA meter is placed on the workbench 5, and the length of the mounting plate 92 extending out of the sleeve 91 is adjusted to facilitate the alignment of the pipe head 11 with the LORA meter connector 3, so as to facilitate the application of LORA meters of different sizes. Then, the lifting plate 9 is driven down by the cylinder 7, and the lifting plate 9 drives the pipe head 11 to descend and approach the LORA meter connector 3.

[0060] Reference Figure 4 , Figure 5 The pipe head 11 is coaxially sleeved with a lifting sleeve 14, and the lifting sleeve 14 is provided with a guide rod 15, which slides through the lifting sleeve 14 in the height direction. The guide rod 15 is threadedly sleeved with a first limiting ring 8. Before placing the LORA meter on the workbench 5, the lifting sleeve 14 is pulled up to facilitate the lifting sleeve 14 to avoid the LORA meter. According to the height of the LORA meter, the first limiting ring 8 is rotated to adjust the height of the lifting sleeve 14 after it is lowered, thereby reducing the situation where the lifting sleeve 14 squeezes the LORA meter.

[0061] A dovetail block 16 is fixedly mounted on the bottom end of the guide rod 15, and the top end of the guide rod 15 is in contact with the machine body 6. A dovetail groove 17 is provided on the top side of the workbench 5 for the dovetail block 16 to slide, and the dovetail groove 17 is arranged along the telescopic direction of the lifting plate 9. A positioning block 18 is fixedly mounted on the top side of the workbench 5, and a positioning rod 19 is provided on the dovetail block 16, and the positioning rod 19 is threadedly penetrated through the portion of the dovetail block 16 located outside the dovetail groove 17.

[0062] When testing the LORA meter for the first time, place the LORA meter on the workbench 5, and let one side of the LORA meter abut against the positioning block 18. Then rotate the positioning rods 19, one positioning rod 19 abuts against one side of the LORA meter, and the other positioning rod 19 abuts against the other side of the LORA meter. When testing the LORA meter of the same size later, directly place the LORA meter on the workbench 5, and position it by the positioning block 18 and the positioning rod 19, so as to facilitate the alignment of the pipe head 11 and the LORA meter connector 3.

[0063] Reference Figure 6, a support ring 20 and a sealing airbag 21 are installed inside the lifting sleeve 14, and a first pressure ring 22 is fixedly sleeved on the pipe head 11. The sealing airbag 21, the support ring 20 and the first pressure ring 22 are arranged in sequence from bottom to top. The support ring 20 is provided with a control mechanism 23, and the control mechanism 23 includes an elastic ring 231, a sealing ring 232, a pressure rod 233 and a second pressure ring 234. The elastic ring 231 is fixedly sleeved on the support ring 20, and the circumferential side of the elastic ring 231 is fixedly connected to the inner wall of the lifting sleeve 14. The elastic ring 231 is bent in the radial direction, and the sealing ring 232 is fixedly installed on the top side of the support ring 20. One end of the pressure rod 233 is fixedly connected to the bottom side of the support ring 20, and the other end of the pressure rod 233 is fixedly connected to the top side of the second pressure ring 234, and the second pressure ring 234 is located above the sealing airbag 21.

[0064] The lifting sleeve 14 drives the pipe head 11 to descend so that the first pressure ring 22 presses the support ring 20 for sealing, thereby descending the support ring 20. The descent of the support ring 20 drives the second pressure ring 234 to squeeze the sealing airbag 21, thereby expanding the sealing airbag 21.

[0065] The sealing airbag 21 expands around the LORA gauge connector 3, and the LORA gauge connector 3 has an inner peripheral side and an outer peripheral side. In the embodiment of the present application, the sealing airbag 21 is fixedly connected to the inner wall of the lifting sleeve 14, so that the sealing airbag 21 is on the outer peripheral side of the LORA gauge connector 3. After the sealing airbag 21 expands, it blocks the space between the inner wall of the lifting sleeve 14 and the outer peripheral side of the LORA gauge connector 3. In another embodiment, the sealing airbag 21 is on the inner peripheral side of the LORA gauge connector 3, and the tube head 11 needs to be inserted into the LORA gauge connector 3. After the sealing airbag 21 expands, it blocks the space between the inner peripheral side of the LORA gauge connector 3 and the outer peripheral side of the tube head 11.

[0066] The first pressure ring 22 presses the support ring 20, and the sealing airbag 21 expands and seals the outer peripheral side of the LORA meter connector 3, thereby reducing the downward pressure exerted by the pipe head 11 on the LORA meter connector 3, thereby improving the accuracy of the LORA meter sealing test.

[0067] A LORA meter testing method, using a LORA meter testing device according to an embodiment of the present application, comprises the following steps:

[0068] S1. Connect the two connectors 3 of the LORA meter to the test device.

[0069] S2. The test device supplies gas to one joint 3 of the LORA meter and seals the other joint 3.

[0070] S3. When the air pressure inside the LORA meter reaches a preset threshold, the two joints 3 of the LORA meter are blocked to maintain the pressure.

[0071] S4. When the pressure holding time of the LORA meter reaches the preset time, if the pressure inside the LORA meter decreases, the LORA meter is unqualified; if the pressure inside the LORA meter remains unchanged, the LORA meter is qualified.

[0072] The implementation principle of a LORA meter testing device and a testing method thereof in an embodiment of the present application is as follows: the LORA meter is placed on a workbench 5 and positioned by a positioning block 18 and a positioning rod 19, so that the LORA meter connector 3 is aligned with the tube head 11. The moving lifting sleeve 14 is inserted into the LORA meter connector 3, and the sealing airbag 21 wraps the outer peripheral side of the LORA meter connector 3 after the lifting sleeve 14 descends. Then the cylinder 7 is started, and the cylinder 7 drives the tube head 11 to descend through the lifting plate 9. The first pressure ring 22 presses the support ring 20 to seal after the tube head 11 descends. The support ring 20 is squeezed downward by the tube head 11, thereby driving the second pressure ring 234 to squeeze the sealing airbag 21. After the sealing airbag 21 expands, it blocks the space between the inner wall of the tube head 11 and the outer peripheral side of the LORA meter connector 3.

[0073] After the first pressure ring 22 presses the support ring 20 and the sealing airbag 21 expands to seal, the body 6 closes the air outlet pipe 13 and starts the air pump. The air pump delivers gas into the LORA meter through the air inlet pipe 12 and the pipe head 11. The body 6 detects the air pressure inside the LORA meter through the air pressure sensor. After the air pressure inside the LORA meter reaches the preset threshold, the valve connecting the air pump and the air inlet pipe 12 is closed to maintain the pressure. When the LORA meter leaks, the air pressure detected by the body 6 through the air pressure sensor will decrease, and the sealing of the LORA meter is unqualified; otherwise, the sealing of the LORA meter is good.

[0074] After the pressure maintenance is completed, the cylinder 7 drives the lifting plate 9 to rise, and the lifting plate 9 drives the first pressure ring 22 away from the support ring 20. The airbag shrinks and recovers to drive the second pressure ring 234 to rise. Then, the LORA table that has been tested is taken off the workbench 5.

[0075] During the air tightness test of the LORA meter, the pipe head 11 does not press the LORA meter joint 3 downward, the first pressure ring 22 applies pressure to the support ring 20, and the sealing sleeve is squeezed on the circumference of the LORA meter joint 3, thereby reducing the downward pressure on the LORA meter and improving the accuracy of the LORA meter sealing test.

[0076] The LORA meter is generally hung on the wall when in use, and the lower shell 2 is fixed to the wall by a bracket, and the two joints 3 are connected to the gas pipeline. The support of the lower shell 2 by the bracket is equivalent to the support of the workbench 5 of this application. The gas pipe head 11 has a certain resistance to the upper shell 1, thereby limiting the upper shell 1 and the lower shell 2 from moving away from each other, and after the sealing airbag 21 of this application is inflated, there is friction between the sealing airbag 21 and the joint 3, thereby limiting the upper shell 1 and the lower shell 2 from moving away from each other. The environment tested in this application is close to the actual use environment of the LORA meter, so that the results of the sealing test of the LORA meter in this application can more easily represent the sealing performance of the LORA meter during actual use.

[0077] Example 2

[0078] The embodiments of the present application disclose a LORA meter testing device and a testing method thereof.

[0079] Reference Figure 7 , Figure 8 , Fig. 9 The difference between a LORA meter testing device of the embodiment of the present application and embodiment 1 is that two third pressure rings 24 are arranged between the support ring 20 and the second pressure ring 234, and the pressure rod 233 slides through the third pressure ring 24.

[0080] Reference Fig. 9 , Fig.10 The inner wall of the third pressure ring 24 is fixedly mounted with a first slider 25, and the outer wall of the tube head 11 is provided with a first slide groove 28 for the first slider 25 to pass through. The first slide groove 28 is gradually lifted and inclined along the circumference of the tube head 11. A telescopic groove 31 is provided on the bottom side of the support ring 20, and one end of the pressure rod 233 away from the second pressure ring 234 is telescopically penetrated in the telescopic groove 31. The first slider 25 slides along the first slide groove 28, and the third pressure ring 24 will rise and fall, and the two third pressure rings 24 move in opposite directions, so that one third pressure ring 24 presses the bottom side of the support ring 20, and the other third pressure ring 24 presses the top side of the second pressure ring 234.

[0081] The lifting plate 9 is provided with a rotating hole 32 for the pipe head 11 to pass through, and a second slider 26 is fixedly installed on the inner wall of the rotating hole 32. The outer wall of the pipe head 11 is provided with a second slide groove 29 for the second slider 26 to slide. The second slide groove 29 is gradually raised along the circumference of the pipe head 11 and is inclined.

[0082] The implementation principle of a LORA meter testing device and a testing method thereof in an embodiment of the present application is as follows: after the cylinder 7 drives the tube head 11 to descend through the lifting plate 9, the first pressure ring 22 and the support ring 20 squeeze each other, and the second pressure ring 234 squeezes the sealing airbag 21, thereby increasing the resistance to the descent of the tube head 11.

[0083] After the resistance of the pipe head 11 to descend increases, the cylinder 7 continues to drive the lifting plate 9 to move downward, so that the pipe head 11 and the lifting plate 9 move relative to each other, and the second slider 26 slides inside the second slide groove 29. The second slider 26 cooperates with the second slide groove 29 to rotate the pipe head 11.

[0084] When the tube head 11 rotates, the third pressing ring 24 is limited by the pressing rod 233 and cannot rotate, and the first slider 25 slides inside the first sliding groove 28, so that the two third pressing rings 24 move in opposite directions. One third pressing ring 24 moves upward to press the bottom side of the support ring 20, and the other third pressing ring 24 moves downward to press the top side of the second pressing ring 234.

[0085] When the third pressing ring 24 moves upward and presses the bottom side of the support ring 20, the first pressing ring 22 and the third pressing ring 24 clamp the support ring 20 together, thereby improving the sealing performance between the first pressing ring 22 and the support ring 20. At the same time, the distance that the first pressing ring 22 presses the support ring 20 to descend is reduced, thereby reducing the possibility of fracture at the connection between the support ring 20 and the elastic ring 231. Another third pressing ring 24 presses the top side of the second pressing ring 234, thereby improving the sealing performance of the sealing airbag 21.

[0086] If during the test, the tube head 11 is retreated by the reaction force, the tube head 11 moves upward, while the lifting plate 9 does not move, so that the two third pressure rings 24 are further away from each other, thereby improving the expansion of the sealing airbag 21 and the sealing performance when the first pressure ring 22 presses the support ring 20.

[0087] After the test is completed, when the cylinder 7 drives the pipe head 11 to rise through the lifting plate 9, the pipe head 11 rotates in the opposite direction to restore, so that the sealing airbag 21 shrinks and restores, and the two third pressure rings 24 approach each other. Then the pipe head 11 moves upward with the lifting plate 9, and then pushes the support ring 20 through the third pressure ring 24, so that the lifting sleeve 14 rises with the pipe head 11, and then it is convenient to drive the lifting sleeve 14 to rise and fall.

[0088] Example 3

[0089] The embodiments of the present application disclose a LORA meter testing device and a testing method thereof.

[0090] Reference Fig.11 , Fig.12 , Fig.13The difference between a LORA meter testing device of the embodiment of the present application and the embodiment 1 is that the sealing airbag 21 expands on the inner peripheral side of the LORA meter connector 3 to seal. The control mechanism 23 of the present application is also different from the embodiment 1. The control mechanism 23 of the embodiment of the present application includes an air storage bag 235 and an air guide tube 236. The air storage bag 235 is fixedly installed on the top side of the support ring 20. The air guide tube 236 is connected to the air storage bag 235 and the sealing airbag 21. The air guide tube 236 is fixedly passed through the support ring 20.

[0091] The top side of the air storage bag 235 is fixedly connected to the bottom side of the first pressure ring 22. When the first pressure ring 22 rises, the first pressure ring 22 drives the lifting sleeve 14 to rise through the air storage bag 235; when the first pressure ring 22 falls, the lifting sleeve 14 falls due to gravity.

[0092] The inner wall of the first pressure ring 22 is fixedly mounted with a third slider 27, and the outer wall of the tube head 11 is provided with a third slide groove 30 for the third slider 27 to slide. The third slide groove 30 is arranged along the height direction, a connecting rod is fixedly connected between the lifting plate 9 and the first pressure ring 22, and the inner wall of the support ring 20 is fixedly connected with the outer wall of the tube head 11. A reinforcement ring 33 is fixedly mounted on the top side of the sealing airbag 21, and the air guide tube 236 is fixedly passed through the reinforcement ring 33.

[0093] The implementation principle of a LORA meter testing device and a testing method thereof in an embodiment of the present application is as follows: the cylinder 7 drives the pipe head 11 to descend and then insert it into the LORA meter joint 3, and the lifting sleeve 14 descends to drive the sealing airbag 21 to enter the interior of the LORA meter joint 3.

[0094] After the pipe head 11 is inserted into the LORA meter connector 3, the pipe head 11 is blocked by the LORA meter and cannot continue to descend. Then the cylinder 7 continues to drive the lifting plate 9 to descend, so that the first pressure ring 22 squeezes the air storage bag 235. The gas inside the air storage bag 235 enters the sealing air bag 21 from the air guide pipe 236, so as to facilitate the control of the expansion of the sealing air bag 21.

[0095] In addition, during the expansion of the sealing airbag 21 , the tube head 11 is inserted into the LORA gauge connector 3 and remains stationary, thereby reducing the friction between the sealing airbag 21 and the tube head 11 , thereby increasing the service life of the sealing airbag 21 .

[0096] After the test is completed, the cylinder 7 drives the pipe head 11 to rise through the lifting plate 9, and the first pressure ring 22 pulls the air bag 235 to move upward, and the gas inside the sealed air bag 21 returns to the inside of the air bag 235, thereby facilitating the control of the contraction and recovery of the air bag 235.

[0097] The above are all 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. A LORA meter testing device, characterized in that: The invention comprises a workbench (5) and a machine body (6) fixedly mounted on the top side of the workbench (5), wherein the machine body (6) is fixedly mounted with a cylinder (7) that can be extended and retracted in the height direction, and a lifting plate (9) is fixedly mounted on the piston rod of the cylinder (7), and pipe heads (11) are mounted on both ends of the lifting plate (9), an air inlet pipe (12) is connected between one of the pipe heads (11) and the machine body (6), and an air outlet pipe (13) is connected between the other of the pipe heads (11) and the machine body (6), and the The pipe head (11) is sleeved with a lifting sleeve (14); the workbench (5) is installed with a guide rod (15); the guide rod (15) slides along the height direction and penetrates the wall of the lifting sleeve (14); the guide rod (15) is threadedly sleeved with a first limit ring (8); a support ring (20) and a sealing airbag (21) are installed inside the lifting sleeve (14); the pipe head (11) is installed with a first pressure ring (22); the sealing airbag (21) and the support ring (20) The support ring (20) and the first pressure ring (22) are sequentially arranged from bottom to top, the support ring (20) is provided with a control mechanism (23), the control mechanism (23) is used to control the expansion or contraction of the sealing airbag (21), the sealing airbag (21) is used to expand around the circumference of the LORA meter connector (3) to perform sealing; the control mechanism (23) comprises an elastic ring (231), a sealing ring (232), a pressure rod (233) and a second pressure ring (234), the elastic ring (231) is fixed The fixed sleeve is arranged on the support ring (20), the circumferential side of the elastic ring (231) is fixedly connected to the inner wall of the lifting sleeve (14), the elastic ring (231) is bent in the radial direction, the sealing ring (232) is fixedly installed on the top side of the support ring (20), one end of the pressure rod (233) is connected to the support ring (20), and the other end of the pressure rod (233) is fixedly connected to the second pressure ring (234), and the second pressure ring (234) is used to squeeze the sealing airbag (21).

2. A LORA meter testing device according to claim 1, characterized in that: A third pressing ring (24) is arranged between the support ring (20) and the second pressing ring (234), the pressing rod (233) slides through the third pressing ring (24), the third pressing ring (24) is fixedly installed with a first slider (25), the outer wall of the tube head (11) is provided with a first slide groove (28) for the first slider (25) to pass through, the first slide groove (28) is gradually raised along the circumference of the tube head (11) and is inclined, there are two third pressing rings (24), one of the third pressing rings (24) is used to press the bottom side of the support ring (20), and the other third pressing ring (24) is used to press the top side of the second pressing ring (234), the bottom side of the support ring (20) is provided with a telescopic groove (31), one end of the pressing rod (233) away from the second pressing ring (234) is telescopically penetrated in the telescopic groove (31), and the tube head (11) is rotatably installed on the lifting plate (9).

3. A LORA meter testing device according to claim 2, characterized in that: The lifting plate (9) is provided with a rotating hole (32) for the pipe head (11) to pass through, a second slider (26) is fixedly mounted on the inner wall of the rotating hole (32), and a second slide groove (29) is provided on the outer wall of the pipe head (11) for the second slider (26) to slide, and the second slide groove (29) is gradually raised and inclined along the circumference of the pipe head (11).

4. A LORA meter testing device according to claim 1, characterized in that: The lifting plate (9) comprises a sleeve (91), a mounting plate (92), a limiting rod (93) and a second limiting ring (94); the mounting plate (92), the limiting rod (93) and the second limiting ring (94) are each provided with two, the outer wall of the sleeve (91) is fixedly connected to the piston rod of the cylinder (7), the mounting plate (92) is inserted into one end of the sleeve (91), the mounting plate (92) is connected to the pipe head (11), the limiting rod (93) is fixedly connected to the outer wall of the sleeve (91) and the piston rod of the cylinder (7) is fixedly connected to the outer wall of the sleeve (91). The guide rod (15) is mounted on the top side of the mounting plate (92); the top side of the sleeve (91) is provided with a limiting opening (10) for the limiting rod (93) to slide; the second limiting ring (94) is threadedly sleeved on the limiting rod (93); a dovetail block (16) is fixedly mounted on the bottom end of the guide rod (15); the top side of the workbench (5) is provided with a dovetail groove (17) for the dovetail block (16) to slide; the dovetail groove (17) is arranged along the telescopic direction of the lifting plate (9).

5. A LORA meter testing device according to claim 4, characterized in that: A positioning block (18) is fixedly mounted on the top side of the workbench (5), and the positioning block (18) is used for abutting against the side wall of the LORA meter. The dovetail block (16) is provided with a positioning rod (19), and the positioning rod (19) is threadedly passed through the portion of the dovetail block (16) located outside the dovetail groove (17), and one end of the positioning rod (19) is used for abutting against one side of the LORA meter.

6. A LORA meter testing method, applied to a LORA meter testing device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Connect the two connectors (3) of the LORA meter to the test device; The test device supplies gas to one joint (3) of the LORA meter and seals the other joint (3); When the air pressure inside the LORA meter reaches a preset threshold, the two joints (3) of the LORA meter are sealed to maintain the pressure; When the pressure holding time of the LORA table reaches the preset time, if the pressure inside the LORA table decreases, the LORA table is unqualified; if the pressure inside the LORA table remains unchanged, the LORA table is qualified.

Images