Gas proportional valve automatic testing equipment

Abstract

The present invention and the technical field of gas valve detection equipment disclose automatic testing equipment for a gas proportional valve, including a test platform, wherein the test platform includes a picking-up robot, a correction station, a picking-up mechanism, an internal leakage detection station, a secondary adjustment station, a characteristic curve detection station, a pressure resistance detection mechanism and an upper cap locking mechanism, wherein the picking-up mechanism includes a sliding shaft and a picking-up clamp sliding along the sliding shaft track, wherein the sliding shaft is horizontally laid above each station along the center line of the test platform, a cap shaking disk is provided on one side of the test platform, and a cap feeding slide leading to one side of the upper cap locking mechanism is provided on the cap shaking disk; the purpose of the present invention is to solve the problem in the background technology that the existing detection equipment cannot guarantee the safety performance due to insufficient detection process, and to solve the problem of low cost and efficiency caused by manual operation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas valve detection equipment, in particular to automatic testing equipment for a gas proportional valve. Background Art

[0002] In the past, after production and assembly, gas valves typically only required airtightness testing and high and low flame testing. Given the current emphasis on safety performance, these two tests alone are insufficient to guarantee the safety and reliability of gas valves. A complete inspection requires internal leakage testing, high and low flame adjustment, characteristic curve testing, and pressure resistance testing to ensure safety performance. Gas valves that only require two inspection steps are typically completed on two separate machines, each with a single workstation. Manually placing the gas valve on the valve seat is difficult, and a single station can only perform a single test. When different tests are required, the valves must be removed manually. After completing the first inspection, a batch of gas valve bodies is manually transferred to another machine for subsequent testing. Because all tests require the tightness of the gas valve's tightening screws, the gas valves must be capped after testing. However, the capping and screwing processes are still manual operations.

[0003] The shape and structure of the gas valve involved in the present invention are as follows Figure 12 As shown, currently, the main steps for the air tightness test of existing gas valves are to place the sealing blocks against the gas pipes at both ends of the gas valve without leaving any gaps, and then pass air pressure into the gas valve for testing to observe whether there are any leaks; the main steps for large and small fire debugging are also to place the sealing blocks against the gas pipes at both ends of the gas valve, pass air into the gas valve, and check whether the air pressure meets the standard value. If not, adjust the tightening screw at the gas valve head; the main steps for characteristic curve testing are also to place the sealing blocks against the gas pipes at both ends of the gas valve, pass air into the gas valve, detect the maximum and minimum air pressures, and the specific air pressure curve, and then compare them with the standard curve; the main steps for pressure resistance testing are to connect the plug of the gas valve, pass voltage into the gas valve, and then connect a wire to the surface of the gas valve body, and connect the wire to the voltage detector.

[0004] In summary, the single detection function of a single device is difficult to meet the needs of multi-directional detection, and manual placement and capping lead to low efficiency, increasing detection time and cost. Therefore, it is necessary to design a fully automatic detection device that can complete multiple tests. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a detection equipment that can complete multiple tests fully automatically, so as to solve the problem that the existing detection equipment in the background technology cannot guarantee safety performance due to insufficient detection procedures, and to solve the problem of low cost and efficiency caused by manual operation.

[0006] This type of automatic testing equipment for gas proportional valves includes a testing platform, on which are provided a picking robot, a correction station, a picking mechanism, an internal leakage detection station, a secondary adjustment station, a characteristic curve detection station, a pressure resistance detection mechanism and an upper cap locking mechanism. The correction station includes a valve seat and a correction cylinder that pushes the entire gas valve into the valve seat. The picking mechanism includes a sliding shaft and a picking clamp that slides along the sliding shaft track. The sliding shaft is horizontally laid above each station along the center line of the testing platform. The picking clamp is connected to a picking power source that drives the picking clamp to extend and retract up and down. The internal leakage detection station, the secondary adjustment station and the characteristic curve detection station are all equipped with a detection mechanism of the same structure. A cap shaking disk is provided on one side of the testing platform, and a cap delivery slide leading to the side of the upper cap locking mechanism is provided on the cap shaking disk.

[0007] The internal leakage detection station, secondary adjustment station and characteristic curve detection station all include a gas valve seat, a left sealing block, a right sealing block, a first joint seat and a second joint seat. The left sealing block and the right sealing block are both provided with air grooves connected to the air pipes at both ends of the gas valve. The left sealing block is transmission-connected to the left translational power source that drives the left sealing block to move toward the left air pipe of the gas valve. The right sealing block is transmission-connected to the right translational power source that drives the right sealing block to move toward the right air pipe of the gas valve. The first joint seat and the second joint seat are respectively connected to the two plugs of the gas valve.

[0008] The internal leakage detection station also includes an air intake pump, an air pressure detector and an exhaust valve. The air intake pump is connected to the air groove of the left sealing block, and the air pressure detector and the exhaust valve are both connected to the air groove of the right sealing block.

[0009] The secondary adjustment station also includes an adjustment component and a dispensing component. The adjustment component includes a support plate, a round shaft, a spline shaft, an adjustment rod and a synchronous pulley. The spline shaft is sleeved on the outer surface of the adjustment rod, and the round shaft is sleeved on the outer surface of the spline shaft. The round shaft passes through the vertical plate and is located on one side of the gas valve head. The head end of the spline shaft and the head end of the adjusting rod respectively match the two tightening screw heads on the gas valve head. The synchronous pulley is fixed on the round shaft. The spline shaft is transmission-connected to the first translational power source that drives the spline shaft to move back and forth. The adjusting rod is transmission-connected to the second translational power source that drives the adjusting rod to move back and forth. The synchronous pulley is transmission-connected to the synchronous motor that drives the synchronous pulley to rotate.

[0010] The dispensing assembly includes a hose, a dispensing head of the hose is tilted downward toward the tightening screw head of the gas valve head, and the hose is transmission-connected to a third translational power source that drives the hose to move left and right.

[0011] The characteristic curve detection station also includes an air inlet pipe, an air outlet pipe and a pressure sensor. The air inlet pipe is communicated with the air groove of the left sealing block, and the air outlet pipe and the pressure sensor are both communicated with the air groove of the right sealing block.

[0012] The test platform is also provided with a flip mechanism, which is located between the characteristic curve detection station and the pressure resistance detection mechanism. The flip mechanism includes a flip seat, which is an L-shaped mirror image setting. The right angle of the flip seat is hinged to the test platform. A flip arm is hinged at the bottom of the flip seat. The flip arm is connected to a flip power source that drives the flip arm to move up and down. A pushing cylinder is provided on one side of the flip seat to push the gas valve into the limit groove. Slide plates are provided on the left and right sides of the flip seat. A push plate is provided on the slide plate to push the gas valve to move on the slide plate.

[0013] The pressure resistance detection mechanism is located above the limiting groove and includes an external socket and an external pressure measuring instrument. The external socket is plugged into a plug of the gas valve, and the external pressure measuring instrument is directly connected to the surface of the gas valve body.

[0014] Conveying plates are provided on both sides of the limit groove for conveying the gas valve in the groove to the bottom of the upper cap locking mechanism. The upper cap locking mechanism includes an upper cap clamp and a screw locking assembly. The upper cap clamp is driven by two different cylinders to clamp the protective cap in the cap delivery slide; the screw locking assembly includes a screw blowing head and a locking rod for tightening the screw in the screw blowing head. The nail outlet of the screw blowing head is aligned with the screw hole of the protective cap on the gas valve. The locking rod is connected to the rotating motor that drives the locking rod to rotate, and the screw blowing head is connected to the cylinder that drives the screw blowing head to rise and fall.

[0015] The test platform is also provided with a shrinking mechanism, which is located on one side of the screw locking assembly. The shrinking mechanism includes several shrinking tubes, which act on the screw connecting column of the gas valve. The shrinking tubes are connected to the cylinder that drives the shrinking tubes up and down.

[0016] The benefits of the present invention are as follows: a variety of inspection stations are set up on the test platform to orderly inspect the different performance of the gas valve to see whether it is a finished product rather than a defective product, so as to solve the problem that the existing inspection equipment cannot guarantee the safety performance due to insufficient inspection process; the process placement and clamping of the inspection process are fully automatically performed by the inspection robot and the clamping hand, which can well solve the problem of cost and low inspection efficiency caused by manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure.

[0018] Figure 2 This is the structural diagram of the picking robot and the correction station.

[0019] Figure 3 This is the structural diagram of the internal leakage detection station.

[0020] Figure 4 Main view of the internal leakage detection station.

[0021] Figure 5 This is the structural diagram of the secondary adjustment inspection station.

[0022] Figure 6 This is a cross-sectional view of the secondary adjustment inspection station.

[0023] Figure 7 Structural diagram of the inspection station for a specific curve.

[0024] Figure 8 This is the structural diagram of the flip mechanism.

[0025] Figure 9 This is a structural diagram of the pressure resistance detection mechanism and the upper cap clamping part.

[0026] Figure 10 This is a structural diagram of the screw locking assembly.

[0027] Figure 11 This is the structural diagram of the necking mechanism.

[0028] Figure 12 This is the structural diagram of the gas valve.

[0029] In the attached figure: 1. Test platform; 2. Removal manipulator; 3. Correction station; 4. Removal mechanism; 5. Internal leakage detection station; 6. Secondary adjustment detection station; 7. Characteristic curve detection station; 8. Pressure resistance detection mechanism; 9. Cap locking mechanism; 10. Cap shaking plate; 11. Cap feeding slide; 12. Gas valve seat; 13. Left sealing block; 14. Right sealing block; 15. First joint seat; 16. Second joint seat; 17. Gas groove; 19. Turnover mechanism; 20. Limiting groove; 21. Narrowing mechanism; 41. Sliding shaft; 42. Removal gripper; 43. Removal power source; 51. Air intake pump; 52. Air pressure detector; 53. Exhaust valve; 61. Adjustment assembly; 62. Glue dispensing assembly; 71. Inlet pipe; 72. Outlet pipe; 73. Pressure sensor; 81. External socket; 91. Cap gripper; 92. Screw locking assembly; 101. Air pipe; 102. Plug; 103 Tightening screw head; 104, connecting column; 131, left translational power source; 141, right translational power source; 191, flip seat; 192, flip arm; 193, flip power source; 194, pushing cylinder; 195, slide plate; 196, push plate; 211, shrinking tube; 611, support plate; 612, circular shaft; 613, spline shaft; 614, adjusting rod; 615, synchronous pulley; 616, first translational power source; 617, second translational power source; 618, synchronous motor; 621, hose; 622, third translational power source; 921, screw blowing head; 922, locking rod; 923, nail outlet; 924, rotating motor. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] At present, gas valves usually only need to undergo air tightness testing and large and small flame testing, but the safety and reliability of the gas valves during use cannot be guaranteed. A complete test requires internal leakage testing, large and small flame adjustment, characteristic curve testing and pressure resistance testing to ensure safety performance. The former gas valves that only need to undergo two testing processes are usually completed separately on two machines, each machine has only a single workstation, and a single workstation can only perform a single test. When different tests are required, they can only be taken away manually. After a batch of gas valve bodies completes the first step of testing, they are manually placed on another machine for subsequent testing. This will result in low testing efficiency and high labor costs. Therefore, it is necessary to design an automatic testing equipment for gas proportional valves. The specific structure is as follows: Figure 1-12As shown, the test platform 1 includes a pick-up manipulator 2, a correction station 3, a pick-up mechanism 4, an internal leakage detection station 5, a secondary adjustment station 6, a characteristic curve detection station 7, a pressure detection mechanism 8 and an upper cap locking mechanism 9. These structures and stations on the test platform 1 are all arranged from one end to the other end of the test platform 1, that is, the settings of these positions can constitute a complete detection process. The correction station 3 in the present invention is symmetrically arranged on both sides of the sliding shaft 41. The pick-up manipulator 2 is located in front of the correction station 3. The pick-up manipulator 2 clamps the gas valve and places it on the gas valve seat 12 of the correction station 3. On the top, because the position is not correct when it is placed, the correction station 3 includes a valve seat and a correction cylinder 31 that pushes the entire gas valve into the valve seat. A correction cylinder 31 is provided on one side of the correction station 3 to push the gas valve position. The picking mechanism 4 includes a sliding shaft 41 and a picking clamp 42 that slides along the track of the sliding shaft 41. The sliding shaft 41 is horizontally laid above each station along the detection sequence. The sliding shaft 41 in the present invention is arranged in parallel above each station. These stations are symmetrically arranged on both sides of the sliding shaft 41, that is, each different detection station is divided into two or even numbers of symmetrical ones, and the picking clamp 42 is set It is placed on a rectangular plate, which slides on the sliding shaft 41 through an electric cylinder or an air cylinder. There are picking grippers 42 on the four corners of the rectangular plate. The picking grippers 42 are connected to the picking power source 43 (electric cylinder) that drives the picking grippers 42 to extend and retract up and down. The internal leakage detection station 5, the secondary adjustment station 6 and the characteristic curve detection station 7 are all equipped with corresponding detection mechanisms. A cap shaking plate 10 is provided on one side of the test platform 1. A cap feeding slide 11 leading to the side of the upper cap locking mechanism 9 is provided on the cap shaking plate 10. The upper cap locking mechanism 9 clamps the protective cap on the cap feeding slide 11 onto the gas valve head for locking.

[0034] Working principle: First, the picking robot 2 at the front end of the test platform 1 clamps the gas valve to the correction station 3 respectively. There is a limiting horseshoe block (gas valve seat 12) on the correction station 3. The gas valve is placed in front of the horseshoe block and has not been pushed in. At this time, the correction cylinder 31 on the correction station 3 pushes the gas valve as a whole (the purpose of correction is mainly to facilitate the subsequent clamping to the station so that the gas valve can be placed in the station for testing).

[0035] Secondly, the pick-up gripper 42 slides to the front end of the slide shaft 41 (i.e., directly above the correction station 3), and the pick-up gripper 42 clamps the gas pipes 101 on both sides of the gas valve, and places the gas valve on the internal leakage detection station 5 of the first detection process. The left sealing block 13 and the right sealing block 14 at both ends of the internal leakage detection station 5 are respectively pressed against the gas pipes 101 at both ends of the gas valve, and the first plug seat 15 and the second plug seat 16 are respectively connected to the two plugs 102 of the gas valve. The first plug seat 15 and the second plug seat 16 are The two contact ends of the detection appliance, the left sealing block 13 and the right sealing block 14 both have air grooves 17. The air intake pump 51 at the bottom of the left sealing block 13 pumps air into the gas valve. After the air enters the right sealing block 14, the air pressure detector 52 detects the air pressure value and compares it with the input air pressure value. If they match, the next process will be carried out. If they do not match, the picking gripper will clamp the defective product out without subsequent testing. After the air pressure test is completed, the exhaust valve 53 on the right sealing block 14 is opened to discharge the air so that the next gas valve can be tested.

[0036] Next, the first plug seat 15 and the second plug seat 16 are separated from the plug 102 respectively, and the left sealing block 13 and the right sealing block 14 are separated from the gas pipes 101 at both ends. The pick-up gripper 42 then picks up the gas valve and places it on the secondary adjustment detection station 6 (the secondary adjustment is to adjust the size of the gas valve). The left sealing block 13 and the right sealing block 14 at both ends of the secondary adjustment station 6 are still respectively pressed against the gas pipes 101 at both ends of the gas valve, and the first plug seat 15 and the second plug seat 16 are still respectively connected to the two plugs 102 of the gas valve. The first plug seat 15 The left and right sealing blocks 13 and 14 both have gas grooves 17. Gas will flow into the left sealing block 13. After the gas enters the gas valve, there is a piston-like magnetic ring inside the gas valve. The gas will push up the ring, and the gas outlet opening in the gas valve will become larger. The gas will be discharged after entering the right sealing block 14. At this time, the magnetic ring will transmit a signal to the external electrical appliance and compare it with a standard value. When the detected value does not meet the standard value, the adjustment component 61 on one side will start to work, and the spline shaft 613 is driven by the cylinder to be sleeved on the first tightening screw head 103 of the gas valve. On the top, the synchronous pulley 615 rotates to drive the spline shaft 613 to adjust the tightness of the first tightening screw head 103, and then the spline shaft 613 retracts, and the adjusting rod 614 in the spline shaft 613 is driven by another cylinder to extend and act on the second tightening screw head 103. The synchronous belt pulley 615 drives the adjusting rod 614 to rotate to adjust the tightness of the second tightening screw head 103. When the measured value is adjusted to match the standard value, the hose 621 is driven by the cylinder, and the glue dispensing head at the head end of the hose 621 will solidify the glue on the adjusted tightening screw head 103 to prevent the subsequent tightening screw head 103 from becoming loose and affecting the size of the gas valve.

[0037] Next, all components on the workstation are separated from the gas valve, and the picking gripper 42 picks up the gas valve on the workstation and places it on the characteristic curve detection workstation 7. As before, the left sealing block 13 and the right sealing block 14 on both sides of the gas valve are respectively pressed against the gas pipes 101 at both ends of the gas valve, and the first plug seat 15 and the second plug seat 16 are still respectively connected to the two plugs 102 of the gas valve. The first plug seat 15 and the second plug seat 16 are the two contact ends of the detection electrical appliance. The left sealing block 13 and the right sealing block 14 both have air grooves 17, and the air inlet pipe 71 allows air to enter the left sealing block 13. The air rushes to the right sealing block 14 and is discharged from the air outlet pipe 72. The pressure sensor 73 on the right sealing block 14 will detect the air pressure, and the external electrical appliance will generate a characteristic curve, which will be compared with the standard curve. If they match, the next process will be carried out. If they do not match, the picking gripper will clamp out the defective product without subsequent testing.

[0038] Next, since the gas valve in the present invention is placed upside down in the work station during the inspection process, the subsequent piece-picking grippers 42 will clamp the gas valve to the slides 195 on both sides respectively (the height of the slides 195 is higher than the height of the previous inspection work stations, and the slides 195 on both sides are horizontal and perpendicular to the slide shaft 41), and the push plates 196 on the slides 195 will be driven by the cylinders to push the gas valve to the middle flip seat 191 (here the push plates are pushed one by one, that is, the push plate 196 on the left slide 195 pushes the gas valve to the flip seat 191 first, and then the push plate 196 on the right slide 195 pushes the gas valve to the flip seat 191), and the flip arm 192 under the flip seat 191 is driven by the cylinder to push upward (the flip arm 192 The head end is hinged to the frontmost side of the flip seat 191), and since the rightmost side of the flip seat 191 is a rotation point, when the flip arm 192 pushes upward, the flip seat 191 will rotate, that is, the inverted gas valve will be flipped to an upright position, and the pushing cylinder 194 on one side of the flip seat 191 will push the flipped gas valve forward out of the flip seat 191, that is, into the limit groove 20.

[0039] Afterwards, there are conveying plates on both sides of the limiting groove 20. In the present invention, the conveying of the gas valve that is turned over and is in the correct position for subsequent testing and capping is achieved by the conveying plates (there are many ways to achieve this, such as by a conveyor belt or by a clamp. Therefore, it is a prior art and will not be explained in detail in the present invention, and it is not marked in the figure). After the gas valve is pushed to the bottom of the pressure detection mechanism 8, the external socket 81 is inserted into a plug 102 of the gas valve, and a wire of the external pressure gauge is directly connected to the surface of the gas valve. After the external socket 81 is supplied with a voltage of 380 volts, the pressure resistance of the gas valve is detected. If it meets the requirements, the next process is carried out. If it does not meet the requirements, the picking clamp will clamp out the defective product without subsequent testing.

[0040] Finally, after the pressure test is completed, the gas valve is transported to the bottom of the upper cap clamp 91. The upper cap clamp 91 can be moved horizontally to the top of the cap delivery slide 11, clamp the protective cap downward, then rise and move horizontally to the top of the gas valve, align the screw hole of the protective cap with the screw hole of the head of the gas valve and put it down. The gas valve continues to be transported to the screw blowing head 921 The bottom of the gas valve is transported to the shrinking mechanism 21 after the upper cap is locked. Since the gas valve has several connecting columns 104 on the valve body to fix the upper and lower covers of the valve body before detection, the shrinking columns 211 of the shrinking mechanism 21 are aligned with those connecting columns 104 and pressed down (the shrinking columns 211 are high-temperature and the inner opening is conical, with the inner opening larger at the bottom and smaller at the top). In this way, the originally large opening is reduced and the screw will not loosen and fall out easily. All processes are completed after the shrinking is completed, but there is a packaging process in the follow-up. This process mainly seals the air pipes 101 at both ends of the gas valve to prevent foreign matter from falling into the valve body.

[0041] like Figure 3-7 As shown, the internal leakage detection station 5, the secondary adjustment station 6, and the characteristic curve detection station 7 all include a gas valve seat 12, a left sealing block 13, a right sealing block 14, a first joint seat 15, and a second joint seat 16. The left sealing block 13 and the right sealing block 14 are both provided with an air groove 17 that communicates with the air pipes 101 at both ends of the gas valve. The left sealing block 13 is drivingly connected to a left translational force source 131 (cylinder) that drives the left sealing block 13 to move toward the left air pipe 101 of the gas valve. The right sealing block 14 is drivingly connected to a right translational force source 141 (cylinder) that drives the right sealing block 14 to move toward the right air pipe 101 of the gas valve. The first joint seat 15 and the second joint seat 16 are respectively connected to the two plugs 102 of the gas valve.

[0042] like Figure 3-4 As shown, the internal leakage detection station 5 also includes an air intake pump 51, an air pressure detector 52 and an exhaust valve 53. The air intake pump 51 is connected to the air groove 17 of the left sealing block 13, and the air pressure detector 52 and the exhaust valve 53 are both connected to the air groove 17 of the right sealing block 14.

[0043] like Figure 5-6As shown, the secondary adjustment station 6 also includes an adjustment component 61 and a dispensing component 62. The adjustment component 61 includes a support plate 611, a round shaft 612, a spline shaft 613, an adjustment rod 614 and a synchronous pulley 615. The spline shaft 613 is sleeved on the outer surface of the adjustment rod 614, and the round shaft 612 is sleeved on the outer surface of the spline shaft 613 (the cross section of the spline shaft 613 is polygonal, so when the round shaft 612 is rotated, the spline shaft 613 will also rotate without slipping, and the rotation of the adjustment rod 614 located in the spline shaft 613 also follows the same principle). The round shaft 612 passes through the vertical plate 611 and is located on one side of the gas valve head. The head end of the spline shaft 613 and the head end of the adjustment rod 614 are respectively matched with the two tightening screw heads 103 on the gas valve head (the cross section of the spline shaft 613 is a hexagon, which is consistent with the first tightening screw head). The screw head 103 matches, and the spline shaft 613 can be sleeved on the first tightening screw head 103 after being extended, which is similar to the principle of a wrench, and the head end of the adjusting rod 104 is a head similar to the head of a plum screwdriver, which can correspondingly rotate the second adjusting screw head 103), and the synchronous pulley 615 is fixedly sleeved on the round shaft 612 (the round shaft 612 and the synchronous pulley 615 are fixed, that is, when the synchronous pulley 615 rotates, the round shaft 612 also rotates, but the round shaft 612 cannot be extended and retracted back and forth), the spline shaft 613 is transmission connected to the first translational power source 616 (cylinder) that drives the spline shaft 613 to move back and forth, the adjusting rod 614 is transmission connected to the second translational power source 617 (cylinder) that drives the adjusting rod 614 to move back and forth, and the synchronous pulley 615 is transmission connected to the synchronous motor 618 that drives the synchronous pulley 615 to rotate.

[0044] The dispensing assembly 62 includes a hose 621 , the dispensing head of which is tilted downward toward the tightening screw 103 of the gas valve head. The hose 621 is in driving connection with a third translational force source 622 (cylinder) that drives the hose 621 to move left and right.

[0045] like Figure 7 As shown, the characteristic curve detection station 7 also includes an air inlet pipe 71, an air outlet pipe 72 and a pressure sensor 73. The air inlet pipe 71 is connected to the air groove 17 of the left sealing block 13, and the air outlet pipe 72 and the pressure sensor 73 are both connected to the air groove 17 of the right sealing block 14.

[0046] The test platform 1 is also provided with a flip mechanism 19, which is located between the characteristic curve detection station 7 and the withstand voltage detection mechanism 8. Figure 8As shown, the flip mechanism 19 includes a flip seat 191, and the flip seat 191 is set in an L-shaped mirror image (under normal circumstances, the blocking plate of the "L" is on the left and the opening is on the right. Then, after mirroring the "L", the blocking plate is on the right and the opening is on the left). The flip seat 191 is hinged at a right angle to the test platform 1 (rotation point), and a flip arm 192 is hinged at the bottom of the flip seat 191. The flip arm 192 is connected to a flip power source 193 (cylinder) that drives the flip arm 192 to move up and down. A pushing cylinder 194 is provided on one side of the flip seat 191 to push the gas valve into the limit groove 20. Slide plates 195 are provided on the left and right sides of the flip seat 191. The slide plate 195 is provided with a push plate 196 for pushing the gas valve to move on the slide plate 195.

[0047] like Figure 9 As shown, the pressure detection mechanism 8 is located above the limit groove 20. The pressure detection mechanism 8 includes an external socket 81 and an external pressure gauge. The external socket 81 is plugged into a plug 102 of the gas valve, and the external pressure gauge is directly connected to the surface of the gas valve body.

[0048] There are conveying plates on both sides of the limiting groove 20 to convey the gas valve in the groove to the bottom of the upper cap locking mechanism 9, such as Figure 10 As shown, the upper cap locking mechanism 9 includes an upper cap clamp 91 and a screw locking assembly 92. The upper cap clamp 91 is driven by two different cylinders to clamp the protective cap in the cap feeding slide 11; the screw locking assembly 92 includes a screw blowing head 921 and a locking rod 922 that drives the screw blowing head 921 to tighten the screw (the screw blowing head 921 is divided into two parts, one part is a screw inlet pipe, and the other part is a screw outlet pipe. The screw inlet pipe is obliquely arranged on one side of the screw outlet pipe, and the screw inlet pipe and the screw outlet pipe are connected. The screw is blown into the screw outlet pipe from the screw inlet pipe, and the locking rod 922 above the screw outlet pipe will rotate). The nail outlet 923 of the screw blowing head 921 is aligned with the screw hole of the protective cap on the gas valve. The locking rod 922 is connected to the rotating motor 924 that drives the locking rod 922 to rotate, and the screw blowing head 921 is connected to the cylinder that drives the screw blowing head 921 to rise and fall.

[0049] like Figure 11 As shown, the test platform 1 is further provided with a shrinking mechanism 21, which is located on one side of the screw locking assembly 92 (the side here refers to the last step that can be completed by the test platform 1 after the previous screw locking process). The shrinking mechanism 21 includes a plurality of shrinking tubes 211, which act on the screw connecting column 104 of the gas valve. The shrinking tube 211 is connected to the cylinder that drives the shrinking tube 211 up and down.

Claims

1. A gas proportional valve automatic testing device, comprising a testing platform (1), characterized in that: The test platform (1) includes a pick-up manipulator (2), a correction station (3), a pick-up mechanism (4), an internal leakage detection station (5), a secondary adjustment station (6), a characteristic curve detection station (7), a pressure resistance detection mechanism (8) and an upper cap locking mechanism (9). The correction station (3) includes a valve seat and a correction cylinder (31) for pushing the entire gas valve into the valve seat. The pick-up mechanism (4) includes a sliding shaft (41) and a pick-up gripper (42) that slides along the track of the sliding shaft (41). The sliding shaft (41) is horizontally laid above each station along the center line of the test platform. The pick-up gripper (42) is connected to the pick-up power source (43) that drives the pick-up gripper (42) to move up and down. The internal leakage detection station (5), the secondary adjustment station (6) and the characteristic curve detection station (7) are all equipped with detection mechanisms of the same structure. A cap shaking plate (10) is provided on one side of the test platform (1). The cap shaking plate (10) is provided with a cap feeding slideway (11) leading to one side of the upper cap locking mechanism (9). The detection mechanism comprises a gas valve seat (12), a left sealing block (13), a right sealing block (14), a first joint seat (15) and a second joint seat (16); the left sealing block (13) and the right sealing block (14) are both provided with an air groove (17) communicating with the air pipes (101) at both ends of the gas valve; the left sealing block (13) is in transmission connection with a left translational power source (131) for driving the left sealing block (13) to move toward the left air pipe of the gas valve; the right sealing block (14) is in transmission connection with a right translational power source (141) for driving the right sealing block (14) to move toward the right air pipe of the gas valve; the first joint seat (15) and the second joint seat (16) are respectively connected to the two plugs (102) of the gas valve; The internal leakage detection station (5) further includes an air intake pump (51), an air pressure detector (52) and an exhaust valve (53), wherein the air intake pump (51) is communicated with the air groove (17) of the left sealing block (13), and the air pressure detector (52) and the exhaust valve (53) are both communicated with the air groove (17) of the right sealing block (14); The secondary adjustment station (6) further comprises an adjustment component (61) and a dispensing component (62), wherein the adjustment component (61) comprises a support plate (611), a circular shaft (612), a spline shaft (613), an adjustment rod (614) and a synchronous pulley (615), wherein the spline shaft (613) is sleeved on the outer surface of the adjustment rod (614), and the circular shaft (612) is sleeved on the outer surface of the spline shaft (613), and the circular shaft (612) passes through the support plate (611) and is located on one side of the gas valve head, and the head end of the spline shaft (613) is in contact with the gas valve head. The head ends of the adjusting rod (614) are respectively matched with the two tightening screw heads (103) on the gas valve head, the synchronous pulley (615) is fixedly sleeved on the circular shaft (612), the spline shaft (613) is transmission-connected with a first translational power source (616) that drives the spline shaft (613) to move forward and backward, the adjusting rod (614) is transmission-connected with a second translational power source (617) that drives the adjusting rod (614) to move forward and backward, and the synchronous pulley (615) is transmission-connected with a synchronous motor (618) that drives the synchronous pulley (615) to rotate; The characteristic curve detection station (7) further includes an air inlet pipe (71), an air outlet pipe (72) and a pressure sensor (73), wherein the air inlet pipe (71) is communicated with the air groove (17) of the left sealing block (13), and the air outlet pipe (72) and the pressure sensor (73) are both communicated with the air groove (17) of the right sealing block (14); The pressure-resistant detection mechanism (8) is located above the limiting groove (20), and the pressure-resistant detection mechanism (8) includes an external socket (81) and an external pressure measuring instrument. The external socket (81) is plugged into a plug (102) of the gas valve, and the external pressure measuring instrument is directly connected to the surface of the gas valve body. The limiting groove (20) is provided with a conveying plate on both sides for conveying the gas valve in the groove to the bottom of the upper cap locking mechanism (9). The upper cap locking mechanism (9) includes an upper cap clamping hand (91) and a screw locking assembly (92). The upper cap clamping hand (91) is driven by two different cylinders to clamp the protective cap in the cap feeding slideway (11); the screw locking assembly (92) includes a screw blowing head (921) and a locking rod (922) for driving the screw blowing head (921) to tighten the screw. The nail outlet (923) of the screw blowing head (921) is aligned with the screw hole of the protective cap on the gas valve. The locking rod (922) is connected to the rotating motor (924) that drives the locking rod (922) to rotate. The screw blowing head (921) is connected to the cylinder that drives the screw blowing head (921) to move up and down.

2. The automatic test equipment for a gas proportional valve according to claim 1, characterized in that: The dispensing assembly (62) includes a rubber hose (621), a dispensing head of the rubber hose (621) tilted downward toward the tightening screw head (103) of the gas valve head, and the rubber hose (621) is transmission-connected to a third translational power source (622) that drives the rubber hose (621) to move left and right.

3. The automatic testing device for a gas proportional valve according to claim 1, characterized in that: The test platform (1) is further provided with a flip mechanism (19), the flip mechanism (19) being located between the characteristic curve detection station (7) and the withstand voltage detection mechanism (8), the flip mechanism (19) comprising a flip seat (191), the flip seat (191) being arranged in an L-shaped mirror image, the flip seat (191) being hinged to the test platform (1) at a right angle, a flip arm (192) being hinged to the bottom of the flip seat (191), the flip arm (192) being in transmission connection with a flip power source (193) for driving the flip arm (192) to move up and down, a pushing cylinder (194) for pushing the gas valve horizontally into the limit groove (20) being provided on one side of the flip seat (191), slide plates (195) being provided on the left and right sides of the flip seat (191), and a push plate (196) for pushing the gas valve to move on the slide plate (195) being provided on the slide plate (195).

4. The automatic testing device for a gas proportional valve according to claim 1, characterized in that: The test platform (1) is further provided with a shrinking mechanism (21), the shrinking mechanism (21) being located on one side of the screw locking assembly (92), the shrinking mechanism (21) comprising a plurality of shrinking tubes (211), the shrinking tubes (211) acting on the connecting column (104) of the gas valve, and the shrinking tubes (211) being transmission-connected to a cylinder that drives the shrinking tubes (211) to move up and down.

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