A detection and compensation device for a solenoid valve

Abstract

The application discloses a detection and compensation device for electromagnetic valves, which comprises a turnover mechanism for driving the electromagnetic valves to turn over to switch the electromagnetic valves between vertical and horizontal states. The detection mechanism comprises a fixed frame one, a pressing assembly one and a test assembly one. The pressing assembly one comprises a positioning cavity one for embedding part of the electromagnetic valve and placing a coil. The electromagnetic valve in the horizontal state is pressed between the fixed frame one and the pressing assembly one. The test assembly one comprises a pressure test unit capable of reciprocating in a first direction and a displacement test unit for detecting the moving distance of the pressure test unit. The compensation mechanism comprises a plurality of placing assemblies and a grabbing assembly. Different compensation shims with different thicknesses are stacked on different placing assemblies. The grabbing assembly grabs the compensation shim with the corresponding thickness according to the test result of the test assembly one and places it on the step surface of the electromagnetic valve in the vertical state. The device can simulate the actual use of the electromagnetic valve to detect and compensate the electromagnetic valve.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic valve processing equipment technology, and in particular to a detection and compensation device for electromagnetic valves. Background Technology

[0002] As the driving mechanism of a solenoid valve, the electromagnetic force directly affects its performance. A solenoid valve consists of a valve body and a main valve. When the coil of the solenoid valve is energized, it generates an electromagnetic force, causing the main valve to move back and forth along the valve body, thus achieving the driving function. Therefore, in the process of assembling a solenoid valve, it is necessary to detect the electromagnetic force of the solenoid valve and measure its magnitude under different currents. How to quickly detect the electromagnetic force of the solenoid valve and promptly compensate for any errors after detection has become a technical problem that needs to be solved. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a detection and compensation device for solenoid valves, which can simulate the actual use of solenoid valves to detect the electromagnetic force of solenoid valves and place compensation shims for compensation based on the detection results.

[0004] To achieve the above objectives, the present invention provides a detection and compensation device for a solenoid valve, comprising:

[0005] A flipping mechanism is used to drive the solenoid valve to flip so that the solenoid valve can switch between a vertical state and a horizontal state.

[0006] The testing mechanism includes a fixing frame, a clamping assembly, and a testing assembly. The fixing frame includes a vertically arranged positioning plate, on which the end of the solenoid valve body can abut. The clamping assembly includes a positioning seat located on one side of the positioning plate in a first direction. The positioning seat has a positioning cavity for the solenoid valve to be partially embedded and for placing a coil. The positioning seat can reciprocate along the first direction to press the horizontally positioned solenoid valve against the positioning plate. The testing assembly includes a pressure testing unit that can reciprocate along the first direction and a displacement testing unit that detects the movement distance of the pressure testing unit. The pressure testing unit is used to press against the stepped surface of the valve body and collect the pressure value change when the main valve of the solenoid valve slides when the coil is energized.

[0007] The compensation mechanism includes multiple placement components and a gripping component. Different thicknesses of compensation pads are stacked on different placement components. The gripping component grips the compensation pad of the corresponding thickness according to the test result of the test component one and places it on the stepped surface of the solenoid valve in a vertical position.

[0008] A conveying mechanism for conveying the solenoid valve in a horizontal state between the flipping mechanism, the detection mechanism, and the compensation mechanism.

[0009] The beneficial effects of this invention are as follows: The electromagnetic force of the solenoid valve is detected at the detection mechanism through displacement and pressure values. The pressure and displacement values ​​are compared with a standard threshold to determine the required compensation height at the valve body step surface. A compensation shim of a specified thickness is selected based on the required compensation height, and the gripping component places the compensation shim of the specified thickness onto the valve body step surface for compensation. The flipping mechanism, conveying mechanism, detection mechanism, and compensation mechanism cooperate with each other. The detection mechanism fixes the solenoid valve in a horizontal state, simulating the actual use scenario of the solenoid valve for detection, and grips a compensation shim of the corresponding thickness for compensation based on the detection results. The device performs rapid detection of the solenoid valve and can provide timely compensation to meet the processing requirements of the solenoid valve.

[0010] Furthermore, the pressure testing unit includes a lateral movement drive, a force sensor, and a force testing probe. The lateral movement drive is fixed to a mounting frame. The force sensor is connected to the lateral movement drive and reciprocates along a first direction under the drive of the lateral movement drive. The force testing probe is fixedly connected to the force sensor. A clearance hole is provided on the positioning plate, allowing the force testing probe to pass through the clearance hole and press against the stepped surface, and to be elastically connected to the main valve. The structure of the pressure testing unit allows it to press against the stepped surface and enables the main valve to move when the solenoid valve is energized.

[0011] Furthermore, the force test probe includes a connecting rod, a pressure block, an elastic element, and a sliding rod. The two ends of the connecting rod are fixedly connected to the force sensor and the pressure block, respectively. The pressure block can press against the stepped surface of the valve body. The sliding rod can reciprocate along the pressure block in a first direction and abut against the main valve. The elastic element is disposed within the pressure block and located on the side of the sliding rod away from the main valve. The elastic element is continuously compressed when the main valve moves towards the sliding rod. The force test probe, through the elastic element, limits the sliding rod to a first position. When the main valve moves, it can push the sliding rod to slide against the elastic force of the elastic element. The structure of the force test probe allows force to be transmitted between the force sensor and the solenoid valve, while simultaneously maintaining elastic contact with the main valve, allowing the main valve to reciprocate when the coil is energized.

[0012] Furthermore, the displacement testing unit includes a displacement sensor and an adapter block. The displacement sensor is fixed on the fixed frame, and the adapter block and the force sensor are fixed and move synchronously.

[0013] Furthermore, the compensation mechanism also includes a re-inspection component, which includes a lifting drive component one, a position sensor two, and a connecting part. The connecting part includes a fixed block and a lifting block that can move up and down along the fixed block. The fixed block is connected to the lifting drive component one and moves up and down under the drive of the lifting drive component one. The lower end of the lifting block extends out of the fixed block and can abut against the step surface or the compensation gasket inside the solenoid valve. The position sensor two is fixed on the fixed block. The position sensor two detects the movement distance of the lifting block relative to the fixed block when it abuts against the step surface and the movement distance relative to the fixed block when it abuts against the compensation gasket inside the solenoid valve.

[0014] The re-inspection component determines whether the compensation shim placed inside the solenoid valve is the required thickness based on the difference between the two movement distances, thus avoiding compensation failure caused by placing the wrong compensation shim.

[0015] Furthermore, the placement assembly is arranged along a first direction, and the gripping assembly includes a third lateral movement drive, a second lifting drive, and a suction head. The second lifting drive and the third lateral movement drive are connected and move along the first direction under the drive of the third lateral movement drive. The suction head is connected to the second lifting drive and moves up and down under the drive of the second lifting drive. The suction head is used to vacuum-adsorb one of the compensation pads. The first lifting drive and the third lateral movement drive are fixedly connected. The re-inspection assembly and the suction head move synchronously along the first direction to approach the solenoid valve, facilitating inspection by the re-inspection assembly.

[0016] Furthermore, the placement assembly includes a placement rod and a dispensing section. Multiple compensation pads are fitted onto the placement rod and stacked vertically. The dispensing section includes two magnets symmetrically arranged on both sides of the placement rod. The two magnets move up and down synchronously and are arranged in opposite directions. The dispensing section separates the uppermost and lower compensation pads on the placement rod, allowing the adsorption head to adsorb only one compensation pad at a time, preventing the compensation pads from sticking together.

[0017] Furthermore, the positioning seat is also provided with an air passage that communicates with the positioning cavity. The air passage is used to introduce external cold air into the coil inside the positioning cavity. The cold air is introduced to cool the coil and prevent high temperatures from damaging the detection mechanism or solenoid valve.

[0018] Furthermore, the detection and compensation device also includes a break-in mechanism, which comprises a second fixing frame, a second clamping assembly, and a second testing assembly. The solenoid valve can be confined between the second fixing frame and the second clamping assembly. When the coil in the second clamping assembly is energized, the second testing assembly detects whether the main valve has a displacement change. When the second testing assembly detects a displacement change in the main valve, the transport mechanism then moves the solenoid valve semi-circularly to the detection mechanism. When the main valve has a displacement change after the coil is energized, it indicates that the main valve and valve body are not stuck, and the solenoid valve is qualified. At this time, it is placed at the detection mechanism for testing to avoid the detection mechanism detecting abnormal solenoid valves.

[0019] Furthermore, the second test component includes a sliding seat, a displacement sensor, an elastic element, and a detection rod. The sliding seat can reciprocate along a first direction under the drive of the lateral drive component. The displacement sensor is fixed on the sliding seat. The detection rod is slidably connected to the sliding seat and can move relative to the sliding seat along the first direction. When the main valve moves toward the detection rod, the detection rod can abut against the main valve and continuously compress the elastic element. The displacement sensor detects the displacement of the detection rod. The detection rod can slide to allow the main valve to move, and the elastic element presses the detection rod against the main valve to ensure that the detection rod and the main valve can move synchronously. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the solenoid valve in an embodiment of the present invention;

[0021] Figure 2 This is a top view of the detection and compensation device in an embodiment of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the detection mechanism in an embodiment of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the detection mechanism from another angle in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the fixing frame 1 and the test component 1 in an embodiment of the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of the pressure testing unit in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram showing the connection between the force testing probe and the solenoid valve in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of positioning seat one in an embodiment of the present invention;

[0028] Figure 9This is a three-dimensional structural diagram of the compensation mechanism in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure for placing components in an embodiment of the present invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the re-inspection component in an embodiment of the present invention;

[0031] Figure 12 This is a cross-sectional view of the re-inspection component in an embodiment of the present invention;

[0032] Figure 13 This is a three-dimensional structural diagram of the running-in mechanism in an embodiment of the present invention;

[0033] Figure 14 This is a three-dimensional structural diagram of test component two in an embodiment of the present invention;

[0034] Figure 15 This is a partial cross-sectional view of test component two in an embodiment of the present invention;

[0035] Figure 16 This is a schematic diagram of the transport mechanism in an embodiment of the present invention;

[0036] Figure 17 This is a schematic diagram of the flipping mechanism in an embodiment of the present invention.

[0037] In the picture:

[0038] 1. Solenoid valve;

[0039] 11. Valve body; 111. Stepped surface; 12. Main valve;

[0040] 2. Tilting mechanism;

[0041] 21. Tilting cylinder; 22. Solenoid valve support claw;

[0042] 3. Handling mechanism;

[0043] 31. Robotic arm; 32. Solenoid valve gripper;

[0044] 4. Testing institutions;

[0045] 41. Fixing frame 1; 411. Positioning plate 1; 4111. Clearance hole 1; 42. Clamping assembly 1; 421. Positioning seat 1; 4211. Positioning cavity 1; 4212. Coil; 4213. Temperature sensor; 422. Lateral movement drive 2; 43. Test assembly 1; 431. Pressure test unit; 4311. Lateral movement drive 1; 4312. Force sensor; 4313. Force test probe; 43131. Connecting rod; 43132. Pressure block; 43133. Elastic element 1; 43134. Sliding rod; 432. Displacement test unit; 4321. Displacement sensor 1; 4322. Adapter block; 44. Clamping assembly 1;

[0046] 5. Compensation agencies;

[0047] 51. Placement component; 511. Placement rod; 512. Magnet; 52. Gripping component; 521. Lateral movement drive component three; 522. Lifting drive component two; 523. Adsorption head; 53. Re-inspection component; 531. Lifting drive component one; 532. Position sensor two; 533. Adapter; 5331. Fixing block; 5332. Lifting block; 5333. Elastic component two;

[0048] 6. Break-in mechanism;

[0049] 61. Fixing frame II; 611. Positioning plate II; 62. Clamping assembly II; 63. Pressing assembly II; 631. Positioning seat II; 64. Testing assembly II; 641. Sliding seat; 6411. Guide part; 64111. Guide plate; 64112. Limiting plate; 642. Displacement sensor III; 643. Elastic element III; 644. Detection rod; 645. Lateral movement drive component IV;

[0050] 7. Conveyor line; 71. Carrier;

[0051] 8. Non-conforming product collection department. Detailed Implementation

[0052] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0053] In the diagrams below, X is the first direction, Y is the second direction, and Z is the vertical direction.

[0054] See appendix Figure 1As shown, the solenoid valve 1 includes a valve body 11 and a main valve 12. When the coil 4212 is energized, a magnetic force is generated within the valve body 11, driving the main valve 12 to slide along the valve body 11. During testing, different current magnitudes are applied to the coil 4212 to detect the electromagnetic force of the solenoid valve 1 under different currents. Due to manufacturing errors, the magnitude of the electromagnetic force of the solenoid valve 1 may vary. Consequently, the distance the main valve 12 moves relative to the valve body 11 under the same current will differ in different solenoid valves 1, causing errors in the solenoid valve 1. Therefore, after testing the electromagnetic force of the solenoid valve 1, it is necessary to compensate for the error by adjusting the relative distance between the stepped surface 111 of the valve body 11 and the end of the main valve 12.

[0055] The present invention provides a detection and compensation device for a solenoid valve, which is used to detect the electromagnetic force of a solenoid valve 1 and to place compensation shims of different thicknesses to compensate the solenoid valve 1 according to the detection results.

[0056] See appendix Figure 2 As shown, the detection and compensation device includes a flipping mechanism 2, a conveying mechanism 3, a detection mechanism 4, and a compensation mechanism 5.

[0057] The flipping mechanism 2 is used to flip the solenoid valve 1, allowing it to switch between a vertical and a horizontal state. A compensation shim needs to be placed on the vertically positioned solenoid valve 1, but the detection mechanism 4 requires the solenoid valve 1 to be held horizontally during testing to simulate its actual operation. The detection mechanism 4 is used to test the electromagnetic force of the solenoid valve 1. The compensation mechanism 5 selects a compensation shim of appropriate thickness based on the test results and places it on the stepped surface 111 of the valve body 11 to compensate for electromagnetic force errors in the solenoid valve 1. The transport mechanism 3 is used to transport the horizontally positioned solenoid valve 1 between the flipping mechanism 2 and the detection mechanism 4.

[0058] See appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, the testing mechanism 4 includes a fixing frame 41, a clamping assembly 42, and a testing assembly 43. The fixing frame 41 includes a vertically arranged positioning plate 411, on which the end of the valve body 11 of the solenoid valve 1 can abut. The clamping assembly 42 includes a positioning seat 421 located on one side of the positioning plate 411 in a first direction. (See attached diagram) Figure 8As shown, the positioning seat 421 has a positioning cavity 4211 into which the solenoid valve 1 is partially embedded. A coil 4212 is disposed within the positioning cavity 4211, capable of surrounding the solenoid valve 1. When the coil 4212 is energized, the solenoid valve 1 generates electromagnetic force, allowing the main valve 12 to slide along the valve body 11. The positioning seat 421 can reciprocate in a first direction to approach or move away from the positioning plate 411, thus confining the solenoid valve 1 between the positioning plate 411 and the positioning seat 421.

[0059] Test component 43 includes a pressure test unit 431 and a displacement test unit 432. The pressure test unit 431 can reciprocate along a first direction to approach and move away from the solenoid valve 1. The pressure test unit 431 is used to press against the stepped surface 111 of the valve body 11 and test the pressure change when the main valve 12 slides. The displacement test unit 432 is used to detect the displacement of the pressure test unit 431 during the pressure test. By comparing the displacement and pressure values ​​with a set threshold, the difference between the electromagnetic force of the solenoid valve 1 and the standard electromagnetic force can be determined.

[0060] In this embodiment, when the solenoid valve 1 is tested, the clamping assembly 42 and the fixing bracket 41 cooperate to position the solenoid valve 1. Different currents are provided by the clamping assembly 42 to generate electromagnetic force in the solenoid valve 1. At this time, the displacement of the solenoid valve 1 under different pressures applied by the pressure testing unit 431, as well as the change in pressure value on the main valve 12 under different currents, are measured to detect the electromagnetic force. The detection mechanism 4 can accurately position the solenoid valve 1 and perform testing on it.

[0061] Solenoid valve 1, which reaches compensation mechanism 5, has been flipped to a vertical position by flipping mechanism 2. See Appendix. Figure 9 As shown, the compensation mechanism 5 includes a placement component 51 and a gripping component 52. Multiple placement components 51 are provided, and compensation pads of different thicknesses are stacked on different placement components 51. The gripping component 52 grips the compensation pad of the corresponding thickness according to the detection result of the detection mechanism 4 and places it on the solenoid valve 1 after the detection mechanism 4 has detected it.

[0062] In this embodiment, the electromagnetic force of the solenoid valve 1 is detected at the detection mechanism 4. The pressure and displacement values ​​are compared with a standard threshold to determine the required compensation height of the solenoid valve 1 at the step surface 111 of the valve body 11. A compensation shim of a specified thickness is selected based on the required compensation height, and the gripping component 52 places the compensation shim of the specified thickness onto the step surface 111 of the valve body 11 for compensation. The flipping mechanism 2, the conveying mechanism 3, the detection mechanism 4, and the compensation mechanism 5 cooperate with each other. The detection mechanism 4 fixes the solenoid valve 1 in a horizontal state, simulates the actual usage scenario of the solenoid valve 1 for detection, and grips a compensation shim of the corresponding thickness for compensation based on the detection results.

[0063] In one embodiment, the detection mechanism 4 further includes a clamping assembly 44, which transfers the solenoid valve 1 delivered by the transport mechanism 3. The clamping assembly 44 is mounted on the fixed frame 41 and is used to clamp the horizontally positioned solenoid valve 1 delivered by the transport mechanism 3. After the clamping assembly 44 clamps the solenoid valve 1, the transport mechanism 3 can move to transport solenoid valves 1 on other detection mechanisms 4. After the solenoid valve 1 is confined between the positioning plate 411 and the positioning seat 421, the clamping assembly 44 releases the solenoid valve 1.

[0064] See appendix Figure 6 and attached Figure 7 As shown, the pressure testing unit 431 includes a transverse drive component 4311, a force sensor 4312, and a force testing probe 4313. The transverse drive component 4311 is fixed on the mounting bracket 41. The force sensor 4312 is connected to the transverse drive component 4311 and reciprocates along a first direction under the drive of the transverse drive component 4311. The force testing probe 4313 and the force sensor 4312 are fixedly connected. An obstacle hole 4111 is provided on the positioning plate 411, through which the force testing probe 4313 can pass and be pressed against the stepped surface 111. The force testing probe 4313 is elastically connected to the main valve 12.

[0065] The lateral drive unit 4311 drives the force sensor 4312 to move toward the solenoid valve 1 until the displacement testing unit 432 detects that the force test probe 4313 has moved a set distance. At this time, the force test probe 4313 is pressed against the stepped surface 111 of the valve body 11. The force sensor 4312 can sense the set pressure value applied to the force test probe 4313 by the solenoid valve 1. This pressure value varies depending on the moving distance of the force sensor 4312. When the coil 4212 is energized, the main valve 12 of the solenoid valve 1 will move under the drive of electromagnetic force. At this time, because the force test probe 4313 and the main valve 12 are in elastic contact, the main valve 12 is allowed to move, and the force sensor 4312 detects the pressure change value.

[0066] See appendix Figure 7 As shown, the force test probe 4313 includes a connecting rod 43131, a pressure block 43132, an elastic element 43133, and a sliding rod 43134. One end of the connecting rod 43131 is connected to the force sensor 4312, and the other end is fixedly connected to the pressure block 43132. The pressure block 43132 can press against the stepped surface 111 of the valve body 11 and only abuts against the valve body 11. The sliding rod 43134 and the pressure block 43132 are slidably connected. The sliding rod 43134 can reciprocate along the pressure block 43132 in a first direction and can abut against the main valve 12. The elastic element 43133 is disposed inside the pressure block 43132 and located on the side of the sliding rod 43134 away from the main valve 12. When the main valve 12 moves toward the sliding rod 43134, the elastic element 43133 is continuously compressed.

[0067] The force test probe 4313 limits the sliding rod 43134 to a first position via an elastic element 43133. When the main valve 12 moves, it can push the sliding rod 43134 to slide against the elastic force of the elastic element 43133. The structure of the force test probe 4313 allows it to transmit force between the force sensor 4312 and the solenoid valve 1, while also making elastic contact with the main valve 12, allowing the main valve 12 to reciprocate when the coil 4212 is energized.

[0068] The sliding rod 43134 includes a rod portion and a limiting portion. The diameter of the rod portion is smaller than the diameter of the limiting portion and is located on the side closer to the clamping assembly 42. The pressure block 43132 has two interconnected channels, Channel 1 and Channel 2, whose diameters correspond to the diameters of the rod portion and the limiting portion, respectively. The limiting portion can only slide within Channel 2, while the rod portion passes through Channel 1. The elastic element 43133 is a spring fixed within Channel 2. One end of the spring abuts against the bottom of Channel 2, and the other end abuts against the limiting portion. When the sliding rod 43134 is not subjected to external force (the push of the main valve 12), the spring pushes the sliding rod 43134 to the first position where the limiting portion abuts against the connection between Channel 1 and Channel 2. At this time, the limiting portion will not slide out of Channel 2, meaning that the sliding rod 43134 will not separate from the pressure block 43132.

[0069] The diameter of the clearance hole 4111 is larger than the diameter of the pressure block 43132, but smaller than the outer diameter of the end face of the valve body 11. This ensures that the pressure block 43132 can pass through the clearance hole 4111, while the valve body 11 can abut against and press against the positioning plate 411.

[0070] For example, the transverse drive component 4311 consists of a stepper motor, a screw, and a nut seat. The stepper motor drives the screw to rotate, and the nut seat and the screw are threaded together. The transverse drive component 4311 uses a stepper motor, which has high precision and can withstand greater pressure. Even if the force test probe 4313 is subjected to a large pressure from the solenoid valve 1, the position of the force sensor 4312 can be kept unchanged by the transverse drive component 4311.

[0071] During testing by the testing mechanism 4, the sliding rod 43134 and the main valve 12 are coaxial, ensuring that the force on the sliding rod 43134 is uniform. In one embodiment, the positioning seat 421 can also move along the second direction to adjust the position of the solenoid valve 1, ensuring that the main valve 12 of the solenoid valve 1 and the sliding rod 43134 are coaxial.

[0072] See appendix Figure 5As shown, the displacement testing unit 432 includes a displacement sensor 4321 and an adapter block 4322. The displacement sensor 4321 is fixed on the mounting bracket 41, and the adapter block 4322 and the force sensor 4312 are fixed and move synchronously. At this time, the displacement sensor 4321 detects the moving distance of the adapter block 4322, which is the displacement of the pressure testing unit 431 when it performs pressure detection.

[0073] See appendix Figure 4 As shown, the clamping assembly 42 further includes a transverse drive component 422 fixed on the mounting bracket 41. The transverse drive component 422 is fixedly connected to the positioning seat 421 and drives the positioning seat 421 to move. For example, the transverse drive component 422 is a cylinder.

[0074] In one embodiment, the positioning base 421 is further provided with an air passage communicating with the positioning cavity 4211. The air passage is used to introduce external cold air into the coil 4212 inside the positioning cavity 4211 to cool the coil 4212. When the coil 4212 is energized, it generates a large amount of heat. Therefore, in this embodiment, the air passage connects the positioning cavity 4211 and the external air supply to cool the coil 4212, preventing damage to the solenoid valve 1 or the coil 4212 due to excessive temperature during testing.

[0075] See appendix Figure 8 As shown, a temperature sensor 4213 is also fixed on the positioning base 421. The temperature sensor 4213 is used to detect the temperature inside the positioning cavity 4211. The temperature sensor 4213 is connected to the switch valve of the external air supply component. When the temperature sensor 4213 senses that the temperature is greater than the set threshold, the external air supply component opens the valve to supply cold air, thereby improving the efficiency of cold air application.

[0076] In one embodiment, the clamping assembly 44 includes a clamping cylinder and a gripper. The clamping cylinder is fixed on the mounting frame 41 and drives the gripper to move relative to or away from each other to clamp the solenoid valve 1. The solenoid valve 1 clamped by the gripper is located between the positioning plate and the positioning seat.

[0077] The inspection time of inspection mechanism 4 is relatively long, so in order to improve processing efficiency, multiple inspection mechanisms 4 are provided. For example, three inspection mechanisms 4 are provided, and all three inspection mechanisms 4 are located within the working area of ​​the conveying mechanism 3.

[0078] The compensation shims are placed manually on the placement assembly 51. Compensation shims stacked on a single placement assembly 51 may be mixed up, meaning they may not be of the same thickness. It is also possible that the gripping assembly 52 will pick up the wrong compensation shim. Therefore, the compensation mechanism 5 also includes a re-inspection assembly 53, which is used to check whether the compensation shims placed inside the solenoid valve 1 are of the required thickness.

[0079] The re-inspection component 53 is used to detect the height difference between the step surface 111 on which the compensation gasket is placed and the upper surface of the compensation gasket after it is placed. If this height difference is the required thickness of the compensation gasket, then the compensation gasket is placed correctly; if the height difference is not the required thickness of the compensation gasket, then the compensation gasket is placed incorrectly.

[0080] In this application, a re-inspection component 53 is added to ensure that the compensation gasket placed on the solenoid valve 1 is correct, so as to avoid the failure to detect the incorrectly placed compensation gasket in time, resulting in product defects or abnormalities in subsequent processing.

[0081] See appendix Figure 11 and attached Figure 12 As shown, the re-inspection component 53 includes a lifting drive component 531, a position sensor 532, and an adapter 533. The adapter 533 includes a fixed block 5331 and a lifting block 5332 that can move up and down along the fixed block 5331. The fixed block 5331 is connected to the lifting drive component 531 and moves up and down under the drive of the lifting drive component 531. The lower end of the lifting block 5332 extends out of the fixed block 5331 and can abut against the stepped surface 111 of the solenoid valve 1 or the compensation pad. The position sensor 532 is fixed on the fixed block 5331 and is used to detect the moving distance of the lifting block 5332 relative to the fixed block 5331.

[0082] The lifting drive component 531 drives the adapter 533 to move a fixed distance d. This fixed distance d ensures that the lower end of the lifting block 5332 can abut against the step surface 111 of the solenoid valve 1 for placing the compensation shim. Before the compensation shim is placed on the step surface 111, the position sensor 532 detects the upward movement distance d1 of the lifting block 5332 relative to the fixed block. After the compensation shim is placed on the step surface 111, the lifting drive component 531 again drives the adapter 533 to move a fixed distance d. At this time, the lifting block 5332 moves upward relative to the fixed block 5331 by a distance d2 under the push of the compensation shim. The difference between distance d1 and distance d2 is the thickness of the compensation shim.

[0083] In one embodiment, see Appendix Figure 12 As shown, the adapter 533 also includes a second elastic element 5333, which is a spring sleeved on part of the lifting block 5332. The second elastic element 5333 is continuously compressed when the lifting block 5332 moves upward relative to the fixed block 5331, so as to store force for the lifting block 5332 to quickly reset.

[0084] See appendix Figure 9As shown, the placement component 51 is arranged along the first direction, and the gripping component 52 includes a transverse drive component 3 521, a lifting drive component 2 522, and an adsorption head 523. The lifting drive component 2 522 is connected to the transverse drive component 3 521 and moves along the first direction under the drive of the transverse drive component 3 521. The adsorption head 523 is connected to the lifting drive component 2 522 and rises and falls under the drive of the lifting drive component 2 522. The lower end of the adsorption head 523 is provided with an annular groove, which is connected to an external vacuum generator. Therefore, the adsorption head 523 can utilize vacuum adsorption to compensate for the pads.

[0085] In one embodiment, the first lifting drive component 531 and the third lateral drive component 521 are fixedly connected, and the second lifting drive component 522 and the first lifting drive component 531 are spaced apart along the first direction. At this time, the re-inspection component 53 and the adsorption head 523 move synchronously along the first direction. When the adsorption head 523 moves to the vicinity of the solenoid valve 1, the re-inspection component 53 also reaches the vicinity of the solenoid valve 1. The re-inspection component 53 can be aligned with the solenoid valve 1 for inspection.

[0086] See appendix Figure 10 As shown, the placement assembly 51 includes a placement rod 511, multiple compensation pads are sleeved on the placement rod 511 and stacked vertically, and the adsorption head 523 adsorbs the compensation pad located at the top.

[0087] Because the compensation pads are stacked vertically, when the adsorption head 523 adsorbs a compensation pad, the topmost pad may stick to the adjacent pad below, causing subsequent compensation abnormalities. Therefore, in one embodiment, the placement assembly 51 further includes a separating section for separating the topmost compensation pad and the lower compensation pad on the placement rod 511.

[0088] The material distribution section includes two magnets 512 symmetrically arranged on both sides of the placement rod 511. The two magnets 512 move up and down synchronously, and their poles are arranged in opposite directions. When the two magnets 512 move up to the uppermost compensation pad, the compensation pad is magnetized. Along the stacking direction, the magnetization direction of each compensation pad alternates or is the same, but the edge effect causes repulsion between adjacent compensation pads, making them easier to separate. At this time, when the adsorption head 523 adsorbs the uppermost compensation pad, it will not stick to the compensation pad below.

[0089] The gripping component 52 first moves the suction head 523 down and presses it against the uppermost compensation pad. Then the two magnets 512 move up to the position of the compensation pad. By magnetizing the compensation pad, the adjacent compensation pads can be easily separated, and the uppermost compensation pad will not detach from the placement rod 511.

[0090] See appendix Figure 16As shown, the handling mechanism 3 includes a robotic arm 31 and at least one solenoid valve gripper 32 fixedly connected to the robotic arm 31. The robotic arm 31 is a four-axis robotic arm, capable of moving the solenoid valve gripper 32 along the X, Y, and Z axes and rotating it around the Z-axis. Each solenoid valve gripper 32 holds a horizontally positioned solenoid valve 1. The solenoid valve gripper 32 grips the outer wall of the solenoid valve 1. For example, there are two solenoid valve grippers 32, allowing the handling mechanism 3 to handle two solenoid valves 1 simultaneously.

[0091] See appendix Figure 17 As shown, the flipping mechanism 2 includes a flipping cylinder 21 and a solenoid valve support claw 22 fixedly connected to the flipping cylinder 21. The solenoid valve support claw 22 is inserted into the solenoid valve 1 to fix the solenoid valve 1 from the inside, so that the subsequent handling mechanism 3 can grab the solenoid valve 1.

[0092] The solenoid valve 1 tested by the testing agency 4 is designed to ensure that the main valve 12 of the solenoid valve 1 can move. However, during the assembly of the main valve 12 and the valve body 11, there may be material jamming, causing the main valve 12 to be unable to slide relative to the valve body 11. Therefore, in one embodiment, see Appendix Figure 2 As shown, the detection and compensation device also includes a break-in mechanism 6. The break-in mechanism 6 is used to detect whether the main valve 12 can slide relative to the valve body 11. The transport mechanism 3 first transports the solenoid valve 1 to the break-in mechanism 6. The solenoid valve 1 that passes the test by the break-in mechanism 6 is then transported to the detection mechanism 4 for testing.

[0093] See appendix Figure 13 As shown, the break-in mechanism 6 includes a second fixing frame 61, a second clamping assembly 62, a second pressing assembly 63, and a second testing assembly 64. The second fixing frame 61, the second clamping assembly 62, and the second pressing assembly 63 have the same structure as the first fixing frame 41, the first clamping assembly 44, and the first pressing assembly 42, respectively. The second fixing frame 61 includes a vertically arranged positioning plate 611, on which the end of the valve body 11 of the solenoid valve 1 can abut. The second clamping assembly 62 is arranged on the second fixing frame 61 and is used to clamp the horizontally positioned solenoid valve 1 brought in by the transport mechanism 3. The second pressing assembly 63 includes a positioning seat 631 located on the second direction side of the positioning plate 611. The positioning seat 631 has a positioning cavity 2 for the solenoid valve 1 to be partially embedded. A coil surrounding the solenoid valve 1 is arranged in the positioning cavity 2. When the coil is energized, the main valve 12 can slide along the valve body 11. Positioning seat 2 631 can reciprocate along the second direction to approach or move away from positioning plate 2 611. When clamping assembly 2 62 releases solenoid valve 1, solenoid valve 1 is confined between positioning plate 2 611 and positioning seat 2 631.

[0094] See appendix Figure 14As shown in the figure, the second test component 64 includes a sliding seat 641, a third displacement sensor 642, a third elastic member 643, and a detection rod 644. The sliding seat 641 can reciprocate along the second direction under the drive of a fourth transverse movement drive member 645. The third displacement sensor 642 is fixed on the sliding seat 641 and moves synchronously with the sliding seat 641. The detection rod 644 is slidably connected to the sliding seat 641. The detection rod 644 and the sliding seat 641 can move synchronously and move along the second direction relative to the sliding seat 641. The detection rod 644 can abut against the main valve 12. When the main valve 12 moves towards the detection rod 644, the third elastic member 643 is continuously compressed, and the third displacement sensor 642 detects the displacement of the detection rod 644.

[0095] When the second positioning seat 631 is powered on and the third displacement sensor 642 detects a change in the displacement of the detection rod 644, it indicates that the main valve 12 can slide relative to the valve body 11. At this time, the main valve 12 and the valve body 11 are not stuck, which is qualified. When the third displacement sensor 642 detects that there is no change in the displacement of the detection rod 644, it indicates that the main valve 12 cannot slide relative to the valve body 11. At this time, the main valve 12 and the valve body 11 are stuck unqualified.

[0096] See the appendix Figure 15 As shown in the figure, the sliding seat 641 includes a guiding portion 6411. The detection rod 644 extends along the second direction and passes through the guiding portion 6411. The guiding portion 6411 includes a guiding plate 64111 and a limiting plate 64112 that are arranged at intervals along the second direction. The guiding plate 64111 is located closer to the electromagnetic valve 1. Coaxial guiding holes are provided on the guiding plate 64111 and the limiting plate 64112. Both ends of the detection rod 644 pass through the two guiding holes. A boss is provided on the detection rod 644 along the circumferential direction. The third elastic member 643 is limited between the limiting plate 64112 and the boss. When the detection rod 644 is not subjected to an external force (pushed by the main valve 12), the third elastic member 643 pushes the detection rod 644 to move until the boss abuts against the guiding plate 64111. At this time, the boss can limit the position of the detection rod 644 to prevent the detection rod 644 from separating from the guiding portion 6411. When the main valve 12 slides, the main valve 12 can push the detection rod 644 to move against the elastic force of the third elastic member 643, and the third elastic member 643 is continuously compressed at this time.

[0097] The third elastic member 643 is a spring, which is sleeved on the detection rod 644 between the limiting plate 64112 and the boss.

[0098] See the appendix Figure 2 As shown in the figure, the device further includes a non-conforming product collection portion 8. The non-conforming product collection portion 8 is located within the working range of the handling mechanism 3. The electromagnetic valve 1 detected as non-conforming by the running-in mechanism 6 is placed in the non-conforming product collection portion 8 by the handling mechanism 3 and does not need to be detected by the subsequent detection mechanism 4.

[0099] The detection and compensation device also includes a conveyor line 7, which is used to transport a carrier 71 containing a solenoid valve 1. The conveyor line 7 transports the carrier 71 along a second direction. A flipping mechanism 2 and a compensation mechanism 5 are arranged sequentially along the second direction. The flipping mechanism 2 takes the solenoid valve 1 from the carrier 71, flips the solenoid valve 1 after it has been detected by the detection mechanism 4, and then places it back onto the carrier 71. When the carrier 71 is transported to the compensation mechanism 5 by the conveyor line 7, the compensation mechanism 5 selects a suitable compensation shim for compensation based on the detection result of the detection mechanism 4.

[0100] In one embodiment, a method for detecting and compensating a solenoid valve is also described, comprising:

[0101] The flipping mechanism 2 grabs the solenoid valve 1, which is in a vertical position on the conveyor line 7, and flips the solenoid valve 1 to a horizontal position.

[0102] The transport mechanism 3 transports the horizontally positioned solenoid valve 1 to the break-in mechanism 6 for testing. The break-in mechanism 6 fixes the solenoid valve 1, and the positioning seat 631 supplies power to the solenoid valve 1. The testing component 64 detects whether the main valve 12 has any displacement changes during this process.

[0103] If test component 2 64 detects a displacement change, the transport mechanism 3 will transport the solenoid valve 1 to the detection mechanism 4 for detection.

[0104] The testing mechanism 4 fixes the solenoid valve 1, and the positioning seat 421 provides different currents to the solenoid valve 1. The pressure testing unit 431 is used to press against the stepped surface 111 of the valve body 11 and test the pressure change when the main valve 12 slides. The displacement testing unit 432 is used to detect the displacement of the pressure testing unit 431 during the pressure test. By comparing the displacement and pressure values ​​with the set threshold, the difference between the electromagnetic force of the solenoid valve 1 and the standard electromagnetic force can be determined.

[0105] The transport mechanism 3 transports the horizontal solenoid valve 1 to the flipping mechanism 2, and the flipping mechanism 2 flips the solenoid valve 1 to a vertical position and places it on the carrier 71.

[0106] The conveyor line 7 drives the carrier 71 to the compensation mechanism 5. The compensation mechanism 5 grabs the compensation pad of the corresponding thickness according to the detection result of the detection mechanism 4 and places it on the solenoid valve 1 for compensation.

[0107] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A detection and compensation device for a solenoid valve, characterized in that: include: A flipping mechanism is used to drive the solenoid valve to flip so that the solenoid valve can switch between a vertical state and a horizontal state. The testing mechanism includes a fixing frame, a clamping assembly, and a testing assembly. The fixing frame includes a vertically arranged positioning plate, on which the end of the solenoid valve body can abut. The clamping assembly includes a positioning seat located on one side of the positioning plate in a first direction. The positioning seat has a positioning cavity for the solenoid valve to be partially embedded and for placing a coil. The positioning seat can reciprocate along the first direction to press the horizontally positioned solenoid valve against the positioning plate. The testing assembly includes a pressure testing unit that can reciprocate along the first direction and a displacement testing unit that detects the moving distance of the pressure testing unit. The pressure testing unit is used to press against the stepped surface of the valve body and collect the pressure value change when the main valve of the solenoid valve slides when the coil is energized. The compensation mechanism includes multiple placement components and a gripping component. Different thicknesses of compensation pads are stacked on different placement components. The gripping component grips the compensation pad of the corresponding thickness according to the test result of the test component one and places it on the vertical step surface. A conveying mechanism for conveying the solenoid valve in a horizontal state between the flipping mechanism and the detection mechanism.

2. The detection and compensation device according to claim 1, characterized in that: The pressure testing unit includes a transverse drive component, a force sensor, and a force testing probe. The transverse drive component is fixed on a mounting frame. The force sensor is connected to the transverse drive component and moves reciprocally along a first direction under the drive of the transverse drive component. The force testing probe is fixedly connected to the force sensor. An obstacle hole is provided on the positioning plate. The force testing probe can pass through the obstacle hole and press against the step surface and be elastically connected to the main valve.

3. The detection and compensation device according to claim 2, characterized in that: The force test probe includes a connecting rod, a pressure block, an elastic element, and a sliding rod. The two ends of the connecting rod are fixedly connected to the force sensor and the pressure block, respectively. The pressure block can press against the stepped surface of the valve body. The sliding rod can reciprocate along the pressure block in a first direction and abut against the main valve. The elastic element is disposed inside the pressure block and located on the side of the sliding rod away from the main valve. The elastic element is continuously compressed when the main valve moves toward the sliding rod.

4. The detection and compensation device according to claim 2, characterized in that: The displacement testing unit includes a displacement sensor and an adapter block. The displacement sensor is fixed on the fixed frame, and the adapter block and the force sensor are fixed and move synchronously.

5. The detection and compensation device according to any one of claims 1-4, characterized in that: The compensation mechanism further includes a re-inspection component, which includes a lifting drive component one, a position sensor two, and a transition part. The transition part includes a fixed block and a lifting block that can move up and down along the fixed block. The fixed block is connected to the lifting drive component one and moves up and down under the drive of the lifting drive component one. The lower end of the lifting block extends out of the fixed block and can abut against the step surface or the compensation gasket in the solenoid valve. The position sensor two is fixed on the fixed block. The position sensor two detects the movement distance of the lifting block relative to the fixed block when it abuts against the step surface and the movement distance relative to the fixed block when it abuts against the compensation gasket in the solenoid valve.

6. The detection and compensation device according to claim 5, characterized in that: The placement component is arranged along a first direction. The gripping component includes a third lateral movement drive, a second lifting drive, and an adsorption head. The second lifting drive and the third lateral movement drive are connected and move along the first direction under the drive of the third lateral movement drive. The adsorption head is connected to the second lifting drive and moves up and down under the drive of the second lifting drive. The adsorption head is used to vacuum adsorb one of the compensation pads. The first lifting drive and the third lateral movement drive are fixedly connected.

7. The detection and compensation device according to claim 1, characterized in that: The placement assembly includes a placement rod and a material distribution section. Multiple compensation pads are sleeved on the placement rod and stacked vertically. The material distribution section includes two magnets symmetrically arranged on both sides of the placement rod. The two magnets rise and fall synchronously and are arranged in opposite directions.

8. The detection and compensation device according to claim 1, characterized in that: The positioning seat is also provided with an air passage that communicates with the positioning cavity. The air passage is used to introduce external cold air into the coil inside the positioning cavity.

9. The detection and compensation device according to claim 1, characterized in that: The detection and compensation device also includes a break-in mechanism, which includes a second fixing frame, a second clamping component, and a second testing component. The solenoid valve can be confined between the second fixing frame and the second clamping component. When the coil in the second clamping component is energized, the second testing component is used to detect whether the main valve has a displacement change. When the second testing component detects that the main valve has a displacement change, the transport mechanism then transports the solenoid valve to the detection mechanism.

10. The detection and compensation device according to claim 9, characterized in that: The second test component includes a sliding seat, a displacement sensor, an elastic element, and a detection rod. The sliding seat can reciprocate along the second direction under the drive of the transverse drive element. The displacement sensor is fixed on the sliding seat. The detection rod is slidably connected to the sliding seat and can move relative to the sliding seat along the second direction. When the main valve moves toward the detection rod, the detection rod can abut against the main valve and continuously compress the elastic element. The displacement sensor detects the displacement of the detection rod.

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