Device for measuring back pressure flow resistance and back pressure electric property of electromagnetic valve

Abstract

The utility model discloses a device for measuring backpressure flow resistance and backpressure electric performance of an electromagnetic valve. The device comprises a backpressure tool assembly, a backpressure connector assembly, a throttling ring, a throttling ring tightening screw and a pressure sensor. The device can simulate the actual working condition of the solenoid valve, and accurately test the flow resistance characteristic and the electrical property characteristic of the solenoid valve. During testing, the electromagnetic valve is assembled and connected with the device, ionized water with rated flow or gas with rated pressure is introduced from a liquid path opening of the electromagnetic valve, and the flow resistance characteristic and the electrical property characteristic of the actual working condition of the electromagnetic valve can be simulated through the throttling ring and the inner diameter of the conduit. According to the pressure sensor and the test equipment, the backpressure flow resistance and the backpressure piezoelectric property of the electromagnetic valve can be directly read out. The device is simple in design principle and convenient to operate, can conveniently, simply and quickly measure the back pressure flow resistance and the back pressure electric performance of the electromagnetic valve, and is convenient for judging the flow resistance characteristic and the electric performance characteristic of the electromagnetic valve under the actual working condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve testing equipment, in particular to a device for measuring the back-pressure flow resistance and back-pressure electrical performance of a solenoid valve. Background Art

[0002] Solenoid valves are key components in fluid control systems and are widely used in aerospace, aviation, electronics, and other industrial fields. In practical applications, solenoid valves often need to operate under certain backpressures. Therefore, their flow resistance and electrical properties under backpressure have a significant impact on system performance. Traditional solenoid valve testing typically focuses only on their flow resistance characteristics under no backpressure or standard backpressure, while ignoring performance variations under different backpressure conditions. This results in test results that do not accurately reflect actual operating conditions. Therefore, it is of great significance to develop a tool that can simulate the actual operating conditions of solenoid valves and accurately test their flow resistance and electrical properties. Summary of the Invention

[0003] The utility model aims to provide a device for measuring the back-pressure flow resistance and back-pressure electrical properties of a solenoid valve, which can simulate the actual working conditions of the solenoid valve and accurately test the flow resistance characteristics and electrical properties of the solenoid valve.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for measuring back-pressure flow resistance and back-pressure electrical performance of a solenoid valve, comprising:

[0006] A back pressure tooling assembly, the back pressure tooling assembly mainly consisting of a conduit, a base plate, a pressure transmitter seat, an outer sleeve nut, and a spherical joint, wherein the axial first end of the conduit passes through the base plate and is fixed to the base plate, the axial second end of the conduit is connected to the spherical joint, the outer sleeve nut is sleeved on the spherical joint, and the pressure transmitter seat with an inner hole is fixed to the circumferential surface of the conduit, and the inner hole of the pressure transmitter seat is connected to the inner cavity of the conduit;

[0007] A back-pressure joint assembly, comprising a back-pressure block and a joint having an inner conical surface, internal threads, and external threads. The back-pressure block is a tube, an axial first end of the back-pressure block is fixedly connected to an end of the joint away from the inner conical surface, the joint is connected to the outer sleeve nut via external threads, and the inner conical surface of the joint is in contact with the spherical joint;

[0008] A throttle ring, the throttle ring being installed inside the joint by tightening the throttle ring screw and the internal thread of the joint;

[0009] The pressure sensor is detachably mounted in the inner hole of the pressure transmitter seat.

[0010] Furthermore, the inner cavity of the catheter is a stepped through hole, and the aperture of the stepped through hole gradually decreases from the axial first end to the axial second end of the catheter. The inner diameter of the spherical joint is equal to the minimum aperture of the stepped through hole in the catheter.

[0011] Furthermore, the inner diameter of the back pressure block is not greater than the minimum inner diameter of the joint.

[0012] As an option, two guide tubes are fixed to one base plate.

[0013] As an option, the conduit, the base plate, the pressure transmitter seat and the ball joint are fixed by welding, and the back pressure block and the joint are fixed by welding.

[0014] Compared to traditional solenoid valve testing, the device for measuring solenoid valve backpressure flow resistance and backpressure electrical properties can simulate the flow resistance and electrical properties of solenoid valves under actual operating conditions, providing a basis for design improvements and quality control of solenoid valves. This device has a simple principle, low maintenance costs, and easy operation, saving manufacturing and testing costs, and can meet the measurement requirements of most valve backpressure operating conditions.

[0015] The utility model has reliable design principle, simple and reasonable structure, simple operation, convenient transportation, low maintenance cost, and saves manufacturing and use costs. It can measure the flow resistance characteristics and electrical performance characteristics of most valves under different working conditions and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a general diagram of a device for measuring the back pressure flow resistance and back pressure electrical properties of a solenoid valve;

[0017] Figure 2 for Figure 1 Left view of;

[0018] Figure 3 This is a schematic diagram of the back pressure tooling assembly;

[0019] Figure 4 Schematic diagram of the back pressure connector assembly;

[0020] Figure 5 Schematic diagram of the throttle ring;

[0021] Figure 6 Diagram of tightening the screws for the throttle ring;

[0022] Figure 7 Schematic diagram of the catheter;

[0023] Figure 8 Schematic diagram of the base plate;

[0024] Figure 9 This is a schematic diagram of the pressure transmitter seat;

[0025] Figure 10 is a schematic diagram of a spherical joint;

[0026] Figure 11 This is the principle diagram of solenoid valve flow resistance / electrical performance test;

[0027] Figure 12 It is the electrical performance curve;

[0028] In the figure: 1-back pressure tooling assembly, 2-throttle ring tightening screw, 3-throttle ring, 4-back pressure joint assembly, 5-pressure sensor, 6-air source, 7-water tank, 8-filter, 9-manual stop valve, 10-flow meter, 11-conduit, 12-base plate, 13-pressure transmitter seat, 14-jacket nut, 15-ball joint, 41-back pressure block, 42-joint. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0030] like Figure 1 As shown, a device for measuring the back pressure flow resistance and back pressure electrical performance of a solenoid valve is mainly composed of a back pressure tooling assembly 1, a back pressure joint assembly 4, a throttle ring 3, a throttle ring tightening screw 2 and a pressure sensor 5 (range 0-10MPa) and other components, among which the pressure sensor 5 is a standard part.

[0031] The backpressure fixture assembly 1 is welded together by a conduit 11, a base plate 12, a pressure transmitter seat 13, and a spherical joint 15. The two conduits 11 are assembled into grooves on the base plate 12 and then welded. The two pressure transmitter seats 13 are modified from standard parts and welded to the notched grooves on the circumferential surfaces of the two conduits 11. The spherical joint 15 is modified from a standard part (8F Y57814-89). One end of the spherical joint has a spherical surface, and the non-spherical outer surface also has a threaded section for connecting to the outer nut 14. It is welded to the small end outlet of the two conduits 11. An M20×1.5 outer nut 14 (8F Y57813-89) is assembled on the spherical joint 15 and is used to connect the backpressure fixture assembly 1 to the backpressure joint assembly 4.

[0032] The back-pressure connector assembly 4 is welded together from a back-pressure block 41 and a connector 42. The back-pressure block 41 has two different apertures, with aperture markings imprinted in designated areas of the block to ensure strict error prevention. The connector 42 is modified from a standard part (B8FY5785-89). The welded back-pressure connector assembly 4 is assembled and connected to the back-pressure fixture assembly 1 using an M20×1.5 outer nut 14 (8F Y57813-89). During assembly, back-pressure connector assemblies 4 of different apertures are connected to different fluid path back-pressure fixture assemblies 1.

[0033] The throttle ring 3 has two different apertures, and the aperture mark is engraved at the designated area of ​​the throttle ring 3. The error prevention measures are strictly controlled. The throttle rings 3 with different apertures are assembled with the back pressure blocks 41 with different apertures.

[0034] The throttle ring tightening screw 2 is used to press the throttle ring 3 inside the joint 42 .

[0035] Because the solenoid valve to be tested has an oxidizer end and a fuel end, two conduits 11 are installed on the same base plate 12 in the backpressure fixture assembly 1 to enable simultaneous testing of both the oxidizer and fuel ends. The end of the conduit 11 corresponding to the base plate 12 serves as the inlet, while the end of the backpressure block 41 away from the connector 42 serves as the outlet.

[0036] The pressure sensor 5 is used to accurately measure the flow rate through the solenoid valve and the device (device for measuring the back pressure flow resistance and back pressure electrical performance of the solenoid valve) to test the flow resistance characteristics of the solenoid valve.

[0037] like Figure 11 The figure shows the principle of testing the flow resistance and electrical performance of a solenoid valve. The left side of the dashed box serves as the comprehensive fluid flow test equipment, while the solenoid valve under test is located within the dashed box. The comprehensive fluid flow test equipment primarily consists of an air source 6, a water tank 7, a filter 8, a manual shutoff valve 9, and a flowmeter 10, encompassing both an air and a fluid line.

[0038] The method for testing the flow resistance using the device for measuring the back pressure flow resistance and back pressure electrical properties of the solenoid valve is as follows:

[0039] Connect the outlet of the solenoid valve to the back pressure fixture assembly 1. Assemble the pressure sensor 5 on the pressure transmitter seat 13 of the back pressure fixture assembly 1. Connect the liquid inlet of the solenoid valve to the outlet of the ionized water end of the liquid flow comprehensive testing equipment. Connect the gas line of the solenoid valve to the nitrogen gas source. Pass the rated voltage DC power to the solenoid valve to fully open the solenoid valve. Adjust the ionized water flow rate at the liquid line end of the solenoid valve to the rated flow range, record 7 points, and draw the "flow-pressure drop" curve of the solenoid valve. According to the "flow-pressure drop" curve, the "flow-pressure drop" relationship and R are obtained. 2 value (a constant obtained after fitting the curve), and then calculate the pressure △P1 under the rated flow rate according to the "flow-pressure drop" relationship. Figure 1The flow rate is the rated flow range, 7 points are recorded, and the device (referring to the device for measuring the back pressure flow resistance and back pressure electrical performance of the solenoid valve) is plotted. Figure 1 The "flow-pressure drop" curve of the device for measuring the back pressure flow resistance and back pressure electrical performance of the solenoid valve is obtained according to the "flow-pressure drop" curve. The relationship between "flow-pressure drop" and R 2 value, and then calculate the pressure △P2 under the rated flow of the tooling according to the "flow-pressure drop" relationship. The back pressure flow resistance of the liquid circuit under the solenoid valve simulated actual working conditions is △P=△P1-△P2, and it is determined according to the design theoretical value.

[0040] Method for conducting electrical performance test using the above-mentioned device for measuring back pressure flow resistance and back pressure electrical performance of solenoid valve:

[0041] The outlet of the solenoid valve is connected to the back pressure fixture assembly 1. The pressure transmitter seat 13 of the back pressure fixture assembly 1 is equipped with a pressure sensor 5. The liquid inlet of the solenoid valve is connected to the outlet of the ion water end of the liquid flow comprehensive testing equipment (i.e., the water in the liquid circuit filtered by the filter 8). The gas circuit of the solenoid valve is connected to the nitrogen gas source. The solenoid valve is connected to a 51Ω leakage loop resistor and a rated voltage DC. Under the rated working voltage, the gas inlet is passed through nitrogen at the rated pressure, and the fuel inlet and the oxidant inlet are respectively passed through ion water at the rated pressure. The solenoid valve is operated three times to test the current-pressure curve of the solenoid valve. The time measured from the time the solenoid valve receives the electrical signal to the time when the pressure is 90% of the pressure value after it stabilizes is the opening time T1; the time measured from the time the electromagnet disconnects the electrical signal to the time when the pressure is 10% of the pressure value after it stabilizes is the closing time T2. The opening time T1 and closing time T2 of the last pulse are read. Figure 12 .

[0042] like Figure 1 and Figure 2 As shown, before using the device for measuring the back-pressure flow resistance and back-pressure electrical performance of the solenoid valve, first assemble the throttle ring 3 and the back-pressure joint assembly 4, and tighten them with the throttle ring tightening screw 2, then connect the back-pressure tooling assembly 1 and the back-pressure joint assembly 4 with the M20×1.5 outer nut 14 and tighten them, and assemble the pressure sensor 5 on the back-pressure tooling assembly 1. After the assembly is completed, mark F and O at the liquid path inlet (F represents the fuel end interface, O represents the oxidant end interface), and mark the tooling number.

[0043] After the device for measuring the back pressure flow resistance and back pressure electrical performance of the solenoid valve is assembled, a professional technician shall check the appearance of the device to ensure that there is no pipe deformation or other physical and mechanical damage. Figure 1 The left end of the middle conduit 11) is connected to the clean nitrogen bottle, and the outlet ( Figure 1Seal the right end of the middle back pressure block 41 with a dust-free cloth, slowly introduce 0.5MPa±0.3MPa nitrogen, and blow it away for no less than 30s. Check whether there is any visible excess on the dust-free cloth, and make sure that the device is assembled correctly and the aperture mark corresponds to the liquid path inlet mark. After assembly, perform a flow resistance test on the device and it can only be used after passing the test.

[0044] like Figure 3 As shown, press Figure 3 Weld the backpressure fixture assembly 1, which consists of a conduit 11, base plate 12, pressure transmitter seat 13, and spherical joint 15. The two conduits are welded to the grooves on the base plate 12. The two pressure transmitter seats 13, modified from standard parts, are welded to the notches on the surfaces of the two conduits 11. The spherical joint 15, modified from a standard part (8F Y57814-89), is welded to the small-diameter outlet of the two conduits 11. An M20×1.5 outer nut 14 (8FY57813-89) is assembled on the spherical joint 15 to connect the backpressure fixture assembly 1 to the backpressure joint assembly 4.

[0045] like Figure 4 As shown, the back-pressure joint assembly 4 is welded together by a back-pressure block 41 and a joint 42. The back-pressure block 41 has two different apertures, and the aperture markings are engraved in designated areas of the block 41 to strictly control errors. The joint 42 is modified from a standard part (B8F Y5785-89). The welded back-pressure joint assembly 4 is assembled and connected to the back-pressure fixture assembly 1 using an M20×1.5 outer nut 15 (8FY57813-89). During assembly, back-pressure joint assemblies 4 of different apertures are connected to different fluid path back-pressure fixture assemblies 1.

[0046] like Figure 5 As shown, the throttle ring 3 is strictly controlled during processing, and the hole diameter and outer diameter are strictly controlled. After processing, the hole diameter is marked on the side of the throttle ring 3, and error prevention measures are strictly implemented. When the throttle ring 3 is assembled with the back pressure joint assembly, the marking is confirmed before assembly. It is strictly forbidden to install it incorrectly.

[0047] like Figures 5 to 10 As shown, the throttle ring tightening screws, conduit, base plate, pressure transmitter seat, and ball joint are all simple machined parts. The machined surface should be free of scratches, abrasions, and other defects that could damage the surface of the part. Remove burrs and clean thoroughly.

[0048] The device for measuring the back pressure flow resistance and back pressure electrical performance of a solenoid valve of the utility model has the following characteristics:

[0049] 1. The utility model simulates the flow resistance and electrical performance of the solenoid valve under actual working conditions, can improve the back pressure of the solenoid valve in actual simulation work, make the test results closer to the actual situation, improve the accuracy and efficiency of the solenoid valve test, and help improve product quality.

[0050] 2. This utility model can simulate different operating conditions to test the flow resistance and electrical performance characteristics of solenoid valves, providing data support for product optimization. To measure the flow resistance and electrical performance of solenoid valves under different operating conditions, simply replace the throttle ring 3 and the back pressure block 41 with different apertures. The operation is simple and has a wide range of applications.

[0051] 3. The utility model is mainly composed of a back pressure tooling assembly 1, a back pressure joint assembly 4, a throttle ring 3, a throttle ring tightening screw 2, a pressure sensor 5 and other components welded and assembled, with a simple structure, easy operation, low maintenance cost, and low manufacturing and use cost.

[0052] The above is the basic structure of the utility model. The measuring device of the utility model has a simple structure, saves production and manufacturing costs, is practical and easy to maintain, easy to transport and operate, and has a reasonable measuring method. It saves time for testing work and ensures product quality from the side. It is an economical and practical measuring device.

[0053] The above is the main concept of the utility model. Any device designed based on the concept of the utility model for measuring the back pressure flow resistance and back pressure electrical properties of the solenoid valve falls within the protection scope of the utility model.

Claims

1. A device for measuring the back pressure flow resistance and back pressure electrical performance of a solenoid valve, characterized in that: include: A back pressure tooling assembly (1), wherein the back pressure tooling assembly (1) mainly consists of a conduit (11), a base plate (12), a pressure transmitter seat (13), an outer sleeve nut (14) and a spherical joint (15), wherein the axial first end of the conduit (11) passes through the base plate (12) and is fixed on the base plate (12), the axial second end of the conduit (11) is connected to the spherical joint (15), the outer sleeve nut (14) is sleeved on the spherical joint (15), and the pressure transmitter seat (13) with an inner hole is fixed on the circumferential surface of the conduit (11), and the inner hole of the pressure transmitter seat (13) is communicated with the inner cavity of the conduit (11); A back pressure joint assembly (4), comprising a back pressure block (41) and a joint (42) having an inner conical surface, an inner thread, and an outer thread, wherein the back pressure block (41) is a tube, an axial first end of the back pressure block (41) is fixedly connected to an end of the joint (42) away from the inner conical surface, the joint (42) is connected to a jacket nut (14) via an outer thread, and the inner conical surface of the joint (42) is in contact with the spherical joint (15); A throttle ring (3), wherein the throttle ring (3) is installed inside the joint (42) through the throttle ring tightening screw (2) and the internal thread of the joint (42); A pressure sensor (5) is detachably mounted in the inner hole of the pressure transmitter seat (13).

2. The device for measuring back pressure flow resistance and back pressure electrical properties of a solenoid valve according to claim 1, characterized in that: The inner cavity of the catheter (11) is a stepped through hole, and the aperture of the stepped through hole gradually decreases from the axial first end to the axial second end of the catheter (11), and the inner diameter of the spherical joint (15) is equal to the minimum aperture of the stepped through hole in the catheter (11).

3. The device for measuring back pressure flow resistance and back pressure electrical properties of a solenoid valve according to claim 1, characterized in that: The inner diameter of the back pressure block (41) is not greater than the minimum inner diameter of the joint (42).

4. The device for measuring back pressure flow resistance and back pressure electrical properties of a solenoid valve according to claim 1, characterized in that: Two guide tubes (11) are fixed on one bottom plate (12).

5. The device for measuring back pressure flow resistance and back pressure electrical properties of a solenoid valve according to claim 1, characterized in that: The conduit (11), the base plate (12), the pressure transmitter seat (13) and the spherical joint (15) are fixed by welding, and the back pressure block (41) and the joint (42) are fixed by welding.

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