Test bench for calibrating proportional valve

Abstract

The utility model relates to the technical field of valve body detection equipment, in particular to a test board for calibrating a proportional valve, which comprises an airtight assembly, the airtight assembly is provided with an airtight base for bearing the proportional valve, and the airtight base is provided with an air inlet channel communicated with an air inlet of the proportional valve; the pressing assembly is provided with a pressing plate used for pressing the proportional valve; the wrench assembly is fixed to the pressing plate, the wrench assembly is provided with a wrench head driven by a motor, and the wrench head can penetrate through the pressing plate to act on an adjusting screw at the end of the proportional valve; according to the device, the pressure resistance value test of the proportional valve can be automatically completed, the test precision is high, the result is more accurate, and the uniformity of the factory pressure resistance values of the proportional valves of the same model is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body detection equipment, in particular to a test bench for calibrating proportional valves. Background Art

[0002] As a crucial component of control systems, accurate pressure calibration of proportional valves is crucial for ensuring safe equipment operation. The current common method for proportional valve pressure calibration involves applying torque to the proportional valve's adjusting screw using a wrench. This torque value determines the valve's pressure resistance. Consequently, the actual applied torque value often deviates, leading to significant errors in the actual calibrated pressure resistance value and inconsistent pressure resistance values for the same model of proportional valve.

[0003] The utility model patent with authorization announcement number CN219830235U discloses a valve body air tightness detection mechanism, including a detection platform, the detection platform, the detection platform is provided with a proportional valve positioning cavity, and a locking connection mechanism for locking the proportional valve is provided on one side of the proportional valve positioning cavity, the detection platform is provided with a rotation adjustment component for adjusting the air tightness of the proportional valve at the lower end of the proportional valve, the upper end of the detection platform is provided with a sealing gas supply structure, and the middle part of the proportional valve is provided with an air tightness detection component, the detection platform is provided with a lifting type clamping component for clamping the proportional valve, and a top pressure positioning structure is provided on the side of the detection platform away from the end rotation adjustment component. The above-mentioned disclosed scheme uses the air tightness detection component to realize curve detection of the air tightness of the proportional valve, which is used for the sealing detection of the valve body, but does not disclose the calibration scheme of the valve body pressure resistance value. Utility Model Content

[0004] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a test bench for calibrating proportional valves.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a test bench for calibrating proportional valves, comprising:

[0006] An airtight assembly, wherein the airtight assembly is provided with an airtight base for carrying a proportional valve, and the airtight base is provided with an air inlet passage communicating with an air inlet of the proportional valve;

[0007] A pressing assembly, wherein the pressing assembly is provided with a pressing plate for pressing the proportional valve;

[0008] a wrench assembly fixed to the pressure plate, the wrench assembly being provided with a motor-driven wrench head, the wrench head being capable of penetrating the pressure plate and acting on an adjusting screw at an end portion of the proportional valve;

[0009] A support seat assembly is used to carry the airtight assembly and the compression assembly.

[0010] Preferably, the upper end surface of the airtight base is provided with a socket matching the lower end of the proportional valve, the lower end of the proportional valve can be vertically placed in the socket, and a sealing ring is provided between the socket and the proportional valve.

[0011] Preferably, the pressure plate is located above the proportional valve, and a first slide rail is provided between the pressure plate and the vertical plate of the support seat assembly. A cylinder is provided at one end of the pressure plate to drive its displacement, and the rod end of the cylinder is connected to the pressure plate, and the cylinder body of the cylinder is connected to the top plate of the support seat assembly. The pressure plate can be displaced along the first slide rail by the action of the cylinder.

[0012] Preferably, a second slide rail is provided between the lower end surface of the airtight base and the bottom plate of the support base assembly, and the airtight base is also provided with a limiting rod to prevent its displacement.

[0013] Preferably, the limiting rod is located on the side of the airtight base close to the vertical plate and passes through the vertical plate. The limiting rod is provided with an external thread and a set of nuts are respectively provided on both end surfaces of the vertical plate.

[0014] Preferably, the airtight base is further provided with an exhaust pipe connected to the air outlet of the proportional valve, and the exhaust pipe is provided with a pressure sensor and an exhaust valve.

[0015] Preferably, a guide sleeve is provided on the outer sleeve of the wrench head, and the guide sleeve is fixedly connected to the pressure plate.

[0016] Preferably, the motor is a servo motor.

[0017] The beneficial effects of the utility model are:

[0018] 1. This device can automatically complete the pressure resistance test of the proportional valve with high test accuracy and more accurate results, ensuring the uniformity of the factory pressure resistance value of proportional valves of the same model.

[0019] 2. The position of the airtight component is adjustable to ensure that the wrench head is aligned with the proportional valve to prevent deviation; at the same time, the guide sleeve used for straightening the outside of the wrench head can avoid vibration during the rotation of the wrench head, which may cause external damage to the proportional valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the proportional valve in this utility model Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the proportional valve in this utility model Figure 2 ;

[0023] Figure 4 This is a three-dimensional diagram of the compression assembly in the utility model;

[0024] Figure 5 This is the main view of the airtight component in the utility model;

[0025] Figure 6 This is a cross-sectional view of the airtight component in the present invention.

[0026] In the figure, 1. Airtight assembly; 2. Proportional valve; 201. Air inlet; 202. Air outlet; 203. Adjusting screw; 3. Clamping assembly; 4. Wrench assembly; 5. Support seat assembly; 501. Vertical plate; 502. Top plate; 503. Bottom plate; 6. Airtight base; 7. Air inlet channel; 8. Exhaust duct; 9. Pressing plate; 10. Motor; 11. Wrench head; 12. Jack; 13. First slide rail; 14. Cylinder; 15. Second slide rail; 16. Limit rod; 17. Nut; 18. Pressure sensor; 19. Exhaust valve; 20. Guide sleeve; 21. Sealing ring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 To the attached Figure 6 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] A test bench for calibrating proportional valves, such as Figure 1 — Figure 6 As shown, it includes: an airtight component 1, a pressing component 3, a wrench component 4 and a support base component 5 that carries the airtight component 1 and the pressing component 3. The device is also provided with a touch screen for controlling and displaying the test process.

[0029] The airtight assembly 1 is provided with an airtight base 6 that supports the proportional valve 2. The upper end surface of the airtight base 6 is provided with a socket 12 that matches the lower end of the proportional valve 2. The lower end of the proportional valve 2 can be vertically placed in the socket 12. To maintain a seal and prevent air leakage, a sealing ring 21 is provided between the socket 12 and the proportional valve 2. In this embodiment, the sealing ring 21 is an O-ring. The airtight base 6 is also provided with an air inlet channel 7 that communicates with the air inlet 201 of the proportional valve 2 and an exhaust pipe 8 that communicates with the air outlet 202 of the proportional valve 2. The air inlet 201 is externally connected to the air inlet pipe. The air inlet pipe is provided with an automatic pressure regulating valve for regulating gas pressure and an on / off solenoid valve for controlling the gas flow. The exhaust pipe 8 is provided with a pressure sensor 18 and an exhaust valve 19.

[0030] The clamping assembly 3 is provided with a pressure plate 9 for clamping the proportional valve 2. The pressure plate 9 is located above the proportional valve 2. A first slide rail 13 is provided between the pressure plate 9 and the vertical plate 501 of the support seat assembly 5. A cylinder 14 is provided at one end of the pressure plate 9 to drive its displacement. The rod end of the cylinder 14 is connected to the pressure plate 9, and the cylinder body of the cylinder 14 is connected to the top plate 502 of the support seat assembly 5. The pressure plate 9 can be displaced along the first slide rail 13 by the action of the cylinder 14. During the loading and unloading process of the proportional valve 2, the cylinder 14 drives the pressure plate 9 to move along the first slide rail 13 to the end away from the proportional valve 2. After the proportional valve 2 is installed in place, the cylinder 14 drives the pressure plate 9 to move along the first slide rail 13 to the end close to the proportional valve 2, and contacts the proportional valve 2 to clamp it to prevent displacement during the test.

[0031] The wrench assembly 4 is fixed to the pressure plate 9 and includes a wrench head 11 driven by a motor 10. This wrench head 11 penetrates the pressure plate 9 and acts on the adjusting screw 203 at the end of the proportional valve 2. In this embodiment, the wrench head 11 has a flat head that mates with the flat end of the adjusting screw 203. To precisely control the torque applied to the adjusting screw 203, the motor 10 is a servo motor.

[0032] In order to prevent the wrench head 11 from vibrating during rotation and failing to align with the "slotted edge" of the adjusting screw 203, thereby causing external damage to the proportional valve 2, a guide sleeve 20 is provided on the outside of the wrench head 11. The guide sleeve 20 is fixedly connected to the pressure plate 9, and the guide sleeve 20 plays a role in straightening the wrench head 11.

[0033] In order to further enable the wrench head 11 to act on the "slot" of the adjusting screw 203, a second slide rail 15 and a limit rod 16 are further provided between the lower end surface of the airtight base 6 and the bottom plate 503 of the support seat assembly 5. The limit rod 16 is located on the side of the airtight base 6 close to the vertical plate 501 and passes through the vertical plate 501. The limit rod 16 is provided with an external thread, and a set of nuts 17 are provided on each end surface of the vertical plate 501. Under the action of external force, the airtight base 6 moves along the second slide rail 15 until the adjusting screw 203 of the proportional valve 2 is aligned with the wrench head 11 in the vertical direction. In order to prevent the position of the proportional valve 2 from moving, the position can be locked by tightening the two sets of nuts 17 to effectively prevent loosening.

[0034] During the test, install the proportional valve 2 to be tested into the socket 12 of the airtight component 1. Adjust the position of the airtight component 1 so that the proportional valve 2 is aligned with the wrench head 11. Simultaneously, move the pressure plate 9 so that it contacts and presses the proportional valve 2. Enter the pressure resistance value of the proportional valve 2 on the touch screen interface. The automatic pressure regulating valve on the intake pipe automatically adjusts the intake pressure value to the pressure resistance value of the proportional valve 2. Open the switch solenoid valve, inflate the airtight base 6, and intermittently open and close the exhaust valve 19. The pressure sensor 18 detects the gas pressure and feeds back the pressure value to the touch screen. The wrench head 11 driven by the motor 10 starts to tighten the adjusting screw 203. When the pressure displayed by the pressure sensor 18 is zero, stop tightening the adjusting screw 203, increase the intake pressure value by 50±10kPa, and continue to inflate the airtight base 6. The valve core of the proportional valve 2 is pushed open due to overpressure, and the pressure sensor 18 detects the pressure value. At this time, the test is completed. The test results show that the proportional valve 2 meets the pressure resistance value requirements and is qualified in the calibration test. The use of this device can automatically complete the pressure resistance value test of the proportional valve 2. The test accuracy is high and the results are more accurate, ensuring the uniformity of the factory pressure resistance value of the same model.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test bench for calibrating proportional valves, characterized by: include: An airtight assembly (1), the airtight assembly (1) being provided with an airtight base (6) for carrying a proportional valve (2), the airtight base (6) being provided with an air inlet passage (7) communicating with an air inlet (201) of the proportional valve (2); A pressing assembly (3), wherein the pressing assembly (3) is provided with a pressing plate (9) for pressing the proportional valve (2); A wrench assembly (4) is fixed on the pressure plate (9), and the wrench assembly (4) is provided with a wrench head (11) driven by a motor (10), and the wrench head (11) can penetrate the pressure plate (9) and act on the adjusting screw (203) at the end of the proportional valve (2); A support seat assembly (5), wherein the support seat assembly (5) is used to carry the airtight assembly (1) and the pressing assembly (3).

2. The test bench for calibrating a proportional valve according to claim 1, characterized in that: The upper end surface of the airtight base (6) is provided with a socket (12) that matches the lower end of the proportional valve (2). The lower end of the proportional valve (2) can be vertically placed in the socket (12). A sealing ring (21) is provided between the socket (12) and the proportional valve (2).

3. The test bench for calibrating proportional valves according to claim 2, characterized in that: The pressure plate (9) is located above the proportional valve (2), and a first slide rail (13) is provided between the pressure plate (9) and the vertical plate (501) of the support seat assembly (5). A cylinder (14) for driving its displacement is provided at one end of the pressure plate (9), and the rod end of the cylinder (14) is connected to the pressure plate (9), and the cylinder body of the cylinder (14) is connected to the top plate (502) of the support seat assembly (5). The pressure plate (9) can be displaced along the first slide rail (13) by the action of the cylinder (14).

4. The test bench for calibrating proportional valves according to claim 3, characterized in that: A second slide rail (15) is provided between the lower end surface of the airtight base (6) and the bottom plate (503) of the support base assembly (5), and the airtight base (6) is also provided with a limiting rod (16) to prevent displacement thereof.

5. The test bench for calibrating a proportional valve according to claim 4, characterized in that: The limiting rod (16) is located on the side of the airtight base (6) close to the vertical plate (501) and passes through the vertical plate (501). The limiting rod (16) is provided with an external thread and a set of nuts (17) are respectively provided on the two end surfaces of the vertical plate (501).

6. The test bench for calibrating proportional valves according to claim 5, characterized in that: The airtight base (6) is also provided with an exhaust pipe (8) connected to the air outlet (202) of the proportional valve (2), and the exhaust pipe (8) is provided with a pressure sensor (18) and an exhaust valve (19).

7. The test bench for calibrating proportional valves according to claim 1, characterized in that: The wrench head (11) is externally sleeved with a guide sleeve (20), and the guide sleeve (20) is fixedly connected to the pressing plate (9).

8. The test bench for calibrating proportional valves according to claim 7, characterized in that: The motor (10) is a servo motor.

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