Miniature electromagnetic valve high-temperature starting test tool

Abstract

The utility model discloses a miniature electromagnetic valve high-temperature starting test tool, and belongs to the technical field of miniature electromagnetic valve manufacturing. The tool comprises a clamp body, the clamp body is provided with an oil inlet pipe connector, an oil outlet pipe connector and a plurality of electromagnetic valve installation cavities, oil inlets P are formed in the bottoms of the multiple electromagnetic valve installation cavities, oil outlets C are formed in the positions, close to the oil inlets P, in the clamp body, the oil outlets C are arranged in the radial direction of the oil inlets P, and the oil inlets P are communicated with the oil inlets P; one end of the oil outlet C is communicated with the oil inlet P. The oil inlet pipe connector is communicated with all the oil inlets P through an oil way A arranged in the clamp body, and the oil outlet pipe connector is communicated with all the oil outlets C through an oil way B arranged in the clamp body. After the environment temperature in the high-temperature test box is increased and kept for one time, high-temperature starting test work of all the miniature electromagnetic valves on the clamp body can be continuously completed one by one, the high-temperature starting test time of the miniature electromagnetic valves is obviously shortened, and the test efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to a high-temperature start-up test tooling for a micro solenoid valve, belonging to the technical field of micro solenoid valve manufacturing. Background Technique

[0002] The function of a certain micro solenoid valve is similar to that of a two-position three-way solenoid valve. It mainly controls the on-off of its oil circuit by controlling the energization and de-energization of the coil. However, compared with the traditional two-position three-way solenoid valve, it has a smaller appearance and lighter weight, and is favored by major host factories. At the same time, this micro solenoid valve can also be used as the pilot structure of other solenoid valves, can be disassembled and replaced at any time, and can also be used for unloading alone as part of a high-pressure product, with a particularly wide range of application scenarios.

[0003] This micro solenoid valve is sometimes also applied to high-temperature environments. Compared with normal-temperature environments, its resistance will increase in high-temperature environments, and the voltage required to achieve the switching of the spool position also increases accordingly. Therefore, to ensure the working reliability of the micro solenoid valve in high-temperature environments, it is necessary to test whether the voltage required for the spool position switching meets the requirements through a high-temperature start-up test before leaving the factory.

[0004] At present, the method for conducting a high-temperature start-up test on a micro solenoid valve is as follows: Open the cabinet door of the high-temperature test chamber, install a micro solenoid valve into the high-temperature test chamber, then close the cabinet door of the high-temperature test chamber, and supply high-temperature hydraulic oil to the micro solenoid valve. After the environmental temperature in the high-temperature test chamber rises to a certain value, keep it warm, and then the test for the voltage required for the spool position switching can be started; Next, open the cabinet door of the high-temperature test chamber again, take out the micro solenoid valve that has completed the test, install the next micro solenoid valve to be tested into the high-temperature test chamber, and repeat the above process; In this way, the high-temperature start-up test of the micro solenoid valve is completed one by one.

[0005] However, the above method for the high-temperature start-up test of the micro solenoid valve still has the following deficiencies:

[0006] Each time the cabinet door of the high-temperature test chamber is opened, it will cause the temperature in the high-temperature test chamber to drop sharply, further resulting in the need to repeat the process of heating and keeping warm the environmental temperature in the high-temperature test chamber for each high-temperature start-up test of the micro solenoid valve, resulting in a long time-consuming and low-efficiency high-temperature start-up test of the micro solenoid valve, and it is difficult to adapt to the large-scale production of micro solenoid valves. Content of the Utility Model

[0007] To solve the above technical problems, the utility model provides a high-temperature start-up test tooling for a micro solenoid valve.

[0008] The utility model is achieved through the following technical solutions:

[0009] A high-temperature start-up test tooling for a micro solenoid valve, comprising a fixture body, wherein an oil inlet pipe joint, an oil outlet pipe joint and a plurality of solenoid valve mounting cavities are provided on the fixture body, oil inlets P are provided at the bottoms of the plurality of solenoid valve mounting cavities, an oil outlet C is provided at a position close to each oil inlet P inside the fixture body, the oil outlet C is arranged radially along the oil inlet P, and one end of the oil outlet C is communicated with the oil inlet P. The oil inlet pipe joint is communicated with all the oil inlets P through an oil passage A arranged inside the fixture body, and the oil outlet pipe joint is communicated with all the oil outlets C through an oil passage B arranged inside the fixture body.

[0010] The solenoid valve mounting cavity is cylindrical and has an internal thread provided therein.

[0011] A positioning hole is provided axially at the bottom of the solenoid valve mounting cavity, and an avoidance hole is provided at the bottom of the solenoid valve mounting cavity.

[0012] The oil inlet P is coaxially arranged with the solenoid valve mounting cavity.

[0013] The oil inlet pipe joint and the oil outlet pipe joint are provided on different sides of the fixture body. The letter P is engraved on the side of the fixture body where the oil inlet pipe joint is provided, and the letter C is engraved on the side of the fixture body where the oil outlet pipe joint is provided.

[0014] The beneficial effects of the present utility model are as follows:

[0015] After the ambient temperature in the high-temperature test chamber undergoes one heating and heat preservation, the high-temperature start-up test work of all the micro solenoid valves on the fixture body can be completed one by one and continuously, significantly shortening the high-temperature start-up test time of the micro solenoid valves, significantly improving the high-temperature start-up test efficiency of the micro solenoid valves, and meeting the high-temperature start-up test requirements for mass production of micro solenoid valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a partial cross-sectional view of the tooling of the present utility model;

[0017] Figure 2 is Figure 1 a cross-sectional view along A-A;

[0018] Figure 3 is Figure 1 a bottom view of

[0019] Figure 4 is Figure 3 a cross-sectional view along B-B;

[0020] Figure 5 is Figure 3 a right view of

[0021] Figure 6 is a structural schematic diagram of a micro solenoid valve;

[0022] Figure 7 Schematic diagram of the assembly structure of the tooling of the present utility model and the micro solenoid valve;

[0023] Figure 8 Schematic diagram of the working principle of the present utility model.

[0024] In the figure: 1 - fixture body, 2 - inlet oil pipe joint, 3 - oil circuit A, 4 - outlet oil pipe joint, 5 - oil circuit B, 6 - inlet oil port P, 7 - avoidance hole, 8 - positioning hole, 9 - outlet oil port C, 10 - solenoid valve installation cavity, 11 - micro solenoid valve, 12 - oil pressure gauge, 13 - oil pump, 110 - valve body, 111 - movable nut, 112 - positioning shaft, 113 - P port, 114 - C port, 115 - lead wire. Specific embodiments

[0025] The technical solutions of the present utility model will be further described below, but the scope of protection is not limited thereto.

[0026] As Figures 1 to 8 shown, a high-temperature start test tooling for a micro solenoid valve according to the present utility model includes a fixture body 1, and the fixture body 1 is provided with an inlet oil pipe joint 2, an outlet oil pipe joint 4 and a plurality of solenoid valve installation cavities 10. The bottom of each of the plurality of solenoid valve installation cavities 10 is provided with an inlet oil port P 6. An outlet oil port C 9 is provided in the fixture body 1 near each inlet oil port P 6. The outlet oil port C 9 is arranged radially along the inlet oil port P 6, and one end of the outlet oil port C 9 is communicated with the inlet oil port P 6. The inlet oil pipe joint 2 is communicated with all the inlet oil ports P 6 through an oil circuit A 3 provided in the fixture body 1. The outlet oil pipe joint 4 is communicated with all the outlet oil ports C 9 through an oil circuit B 5 provided in the fixture body 1. When in use, the number of solenoid valve installation cavities 10 on the fixture body 1 is determined according to needs, and the more the number of solenoid valve installation cavities 10, the better.

[0027] The solenoid valve installation cavity 10 is cylindrical, and the solenoid valve installation cavity 10 is provided with internal threads. The internal threads in the solenoid valve installation cavity 10 are used for threaded connection with the movable nut 111 of the micro solenoid valve 11 to realize the rapid installation of the micro solenoid valve 11.

[0028] The bottom of the solenoid valve installation cavity 10 is provided with a positioning hole 8 along the axial direction, and the bottom of the solenoid valve installation cavity 10 is provided with an avoidance hole 7.

[0029] The inlet oil port P 6 is coaxially arranged with the solenoid valve installation cavity 10.

[0030] The inlet oil pipe joint 2 and the outlet oil pipe joint 4 are arranged on different sides of the fixture body 1. On the side of the fixture body 1 where the inlet oil pipe joint 2 is located, the letter P is engraved, and on the side where the outlet oil pipe joint 4 is located, the letter C is engraved. Identification and distinction are carried out through the letters P and C to prevent the misconnection of the inlet oil pipe joint 2 and the outlet oil pipe joint 4.

[0031] A test method for a high-temperature start-up test tooling of a micro solenoid valve includes the following steps:

[0032] Step 1: Place the fixture body 1 in a high-temperature test chamber, and connect the inlet oil pipe joint 2 on the fixture body 1 to the oil outlet in the high-temperature test chamber through the oil pipe A.

[0033] Step 2: Connect the outlet oil pipe joint 4 on the fixture body 1 to the oil pressure gauge 12 through the oil pipe B, and the oil pressure gauge 12 is located outside the high-temperature test chamber.

[0034] Step 3: Open the cabinet door of the high-temperature test chamber, and install a plurality of micro solenoid valves 11 one by one at a plurality of solenoid valve installation cavities 10 on the fixture body 1.

[0035] Step 4: Extend the lead wires 115 of all the micro solenoid valves 11 on the fixture body 1 to the outside of the high-temperature test chamber through cables respectively, and connect all the cables to an external power supply respectively.

[0036] Step 5: Close the cabinet door of the high-temperature test chamber, and then start the oil pump 13 in the high-temperature test chamber to introduce high-temperature hydraulic oil into all the micro solenoid valves 11 on the fixture body 1, and keep the temperature after the environmental temperature in the high-temperature test chamber rises to the required value.

[0037] Step 6: Energize a certain micro solenoid valve 11 on the fixture body 1, and gradually increase the voltage at both ends of the micro solenoid valve 11. When the reading of the oil pressure gauge 12 suddenly increases, it indicates that the micro solenoid valve 11 has switched positions. Compare the voltage at both ends of the micro solenoid valve 11 at this time with the designed voltage, and judge whether the micro solenoid valve 11 is qualified. Finally, cut off the power supply of the micro solenoid valve 11.

[0038] Step 7: Repeat Step 6 to complete the high-temperature start-up test of the remaining micro solenoid valves 11 on the fixture body 1 one by one.

[0039] Step 8: Open the cabinet door of the high-temperature test chamber, remove all the micro solenoid valves 11 on the fixture body 1, and then install a plurality of the next batch of micro solenoid valves 11 to be tested one by one at a plurality of solenoid valve installation cavities 10 on the fixture body 1.

[0040] Step 9: Repeat Steps 4 to 8 to complete the high-temperature start-up tests for all the micro solenoid valves 11 batch by batch. During use, the ambient temperature inside the high-temperature test chamber can be detected by a temperature sensor. In Step 6, when the reading of the oil pressure gauge 12 suddenly increases to 28 Mpa, it indicates that the micro solenoid valve 11 has switched its working position. As can be seen from Steps 5 to 7, after the ambient temperature inside the high-temperature test chamber experiences one heating-up and heat preservation cycle, the high-temperature start-up tests for all the micro solenoid valves 11 on the fixture 1 can be completed one by one and continuously, significantly shortening the high-temperature start-up test time of the micro solenoid valves 11, remarkably improving the high-temperature start-up test efficiency of the micro solenoid valves 11, and meeting the high-temperature start-up test requirements for mass production of the micro solenoid valves 11.

[0041] The method of installing the micro solenoid valve 11 at the solenoid valve installation cavity 10 on the fixture 1 in Step 3 includes the following steps:

[0042] Step 1: Plug the R port on the micro solenoid valve 11.

[0043] Step 2: Insert the positioning shaft 112, P port 113, and lead wire 115 on the micro solenoid valve 11 into the positioning hole 8, oil inlet P6, and avoidance hole 7 at the bottom of the solenoid valve installation cavity 10 respectively.

[0044] Step 3: Connect the movable nut 111 outside the valve body 110 of the micro solenoid valve 11 to the internal thread on the solenoid valve installation cavity 10 and tighten the movable nut 111. At this time, the C port 114 on the micro solenoid valve 11 just docks with the oil outlet C9. In Step 1, since the high-temperature start-up test of the micro solenoid valve 11 checks the voltage when the P port 113 and C port 114 are connected, which has nothing to do with the R port and the R port is not measured, the R port is plugged. When conducting the high-temperature start-up test for one of the micro solenoid valves 11 on the fixture 1, it can be judged whether the P port 113 and C port 114 of the micro solenoid valve 11 are connected according to the reading on the oil pressure gauge 12. When the P port 113 and C port 114 of the micro solenoid valve 11 are connected, only the oil circuit is connected in the forward direction. At the same time, since the R ports of all the micro solenoid valves 11 on the fixture 1 are plugged and not conducting, it can avoid oil leakage in the micro solenoid valves 11, thus ensuring that when testing the micro solenoid valves 11 one by one, it will not affect the other micro solenoid valves 11 on the fixture 1.

[0045] The temperature of the high-temperature hydraulic oil in Step 5 is 135 degrees.

[0046] In Step 6, if the voltage at both ends when the micro solenoid valve 11 realizes the working position switch is less than the designed voltage, then the micro solenoid valve 11 is qualified.

[0047] The designed voltage of the micro solenoid valve 11 in Step 6 is 18V.

Claims

1. A micro solenoid valve high temperature start-up test tool, characterized in that: The invention comprises a clamp body (1), wherein the clamp body (1) is provided with an oil inlet pipe joint (2), an oil outlet pipe joint (4) and a plurality of solenoid valve installation cavities (10), the bottoms of the plurality of solenoid valve installation cavities (10) are each provided with an oil inlet P (6), the clamp body (1) is provided with an oil outlet C (9) at a position close to each oil inlet P (6), the oil outlet C (9) is arranged along the radial direction of the oil inlet P (6), and one end of the oil outlet C (9) is connected to the oil inlet P (6), the oil inlet pipe joint (2) is connected to all the oil inlets P (6) through an oil path A (3) provided in the clamp body (1), and the oil outlet pipe joint (4) is connected to all the oil outlets C (9) through an oil path B (5) provided in the clamp body (1).

2. The micro solenoid valve high temperature start-up test tool as claimed in claim 1, characterized in that: The solenoid valve installation cavity (10) is cylindrical, and an internal thread is provided in the solenoid valve installation cavity (10).

3. The micro solenoid valve high temperature start-up test tool as claimed in claim 2, characterized in that: A positioning hole (8) is provided at the bottom of the solenoid valve installation cavity (10) along the axial direction, and an avoidance hole (7) is provided at the bottom of the solenoid valve installation cavity (10).

4. The micro solenoid valve high temperature start-up test tool as claimed in claim 2, characterized in that: The oil inlet P (6) is coaxially arranged with the solenoid valve installation cavity (10).

5. The micro solenoid valve high temperature start-up test tool as claimed in claim 1, characterized in that: The oil inlet pipe joint (2) and the oil outlet pipe joint (4) are arranged on different sides of the clamp body (1); the letter P is engraved on the side of the clamp body (1) where the oil inlet pipe joint (2) is arranged, and the letter C is engraved on the side of the clamp body (1) where the oil outlet pipe joint (4) is arranged.

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