Device for measuring initial air gap of electromagnetic valve and determining thickness of adjusting gasket

Abstract

The utility model discloses a device for measuring the initial air gap of an electromagnetic valve and determining the thickness of an adjusting gasket, and belongs to the technical field of electromagnetic valves. Comprising an electromagnetic valve body structure and a clamping testing device, the electromagnetic valve body structure comprises a valve sleeve, an armature, a valve element and a reset spring, the clamping testing device comprises a clamping frame body and measuring equipment, and the clamping frame body comprises a frame body, a pneumatic clamping jaw arranged at the bottom of the frame body, an upper clamping tool, a middle clamping tool and a lower clamping tool; the measuring equipment comprises a laser displacement sensor and a pull pressure sensor which are arranged above the frame body and are used for measuring a measured piece, and an upper computer which is in communication connection with the measuring equipment; an adjusting gasket is arranged between the bottom of the reset spring and the bottom face of the middle clamping tool. According to the utility model, the clamping frame body and the measuring equipment are designed on the structure of the electromagnetic valve body, so that high-precision full measurement of the initial air gap of the electromagnetic valve can be directly measured through the sensor, and batch inspection of the electromagnetic valve is realized.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to a device for measuring the initial air gap of an electromagnetic valve and determining the thickness of the adjusting shim. Background Technology

[0002] The initial air gap of a solenoid valve refers to the distance between the armature and the valve sleeve, that is, the gap between them when the electromagnet attracts the valve body. In a solenoid valve, the initial air gap is a crucial parameter that affects its performance indicators such as response speed, force, and noise. Specifically, its effects include the following:

[0003] 1) The initial air gap has a great influence on the response speed of the solenoid valve. When the air gap is large, the magnetic field generated by the electromagnet needs to overcome greater resistance to attract the valve body, thus prolonging the response time. When the air gap is small, the magnetic field generated by the electromagnet can quickly attract the valve body, making the solenoid valve respond more quickly.

[0004] 2) The initial air gap also affects the force of the solenoid valve. In a solenoid valve, the attraction force exerted by the magnet on the valve body depends on the magnetic field strength and the size of the air gap. When the air gap is smaller, the magnetic field strength is stronger under the same conditions, and the attraction force is also greater.

[0005] 3) The initial air gap also affects the noise level of the solenoid valve. When the air gap is large, the valve body will generate greater vibration and noise when attracted by the electromagnet; while when the air gap is small, the vibration and noise of the valve body can be reduced.

[0006] However, there is currently no automatic detection equipment for the initial air gap, and detection can only be carried out manually, usually by measuring with calipers, which results in low measurement accuracy and low efficiency, and cannot meet the requirements of large-scale inspection.

[0007] Therefore, how to correctly measure and adjust the initial air gap of a solenoid valve is a technical problem that urgently needs to be solved in the field of solenoid valves. Utility Model Content

[0008] The purpose of this invention is to overcome the problems of low accuracy and low efficiency in the measurement of initial air gap in the prior art, and to provide a device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjustment shim. The device, by designing a clamping frame and measuring equipment on the solenoid valve body structure, can directly measure the initial air gap of the solenoid valve with high accuracy through the sensor, realize batch inspection of solenoid valves, improve the working efficiency of solenoid valves, and extend their service life.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a device for measuring the initial air gap of a solenoid valve and determining the thickness of an adjustment shim, comprising a solenoid valve body structure and a clamping and testing device, wherein the solenoid valve body structure comprises a valve sleeve, an armature, a valve core and a return spring, the valve sleeve and the armature are in contact, the middle of the valve sleeve is provided with a cavity that runs vertically through it, the upper part of the armature is provided with an inverted conical movable upper cavity and the lower part is provided with a cylindrical movable lower cavity that communicates with the movable upper cavity, the upper part of the valve core is provided with a valve stem and the lower part is provided with a T-shaped head, and is movably disposed in the cavity of the valve sleeve through the valve stem, and is movably disposed in the movable upper cavity of the armature through the T-shaped head, the upper end of the return spring passes through the movable lower cavity and is vertically located in the movable upper cavity;

[0010] The clamping and testing device includes a clamping frame and measuring equipment. The clamping frame includes a frame body, pneumatic grippers located at the bottom of the frame body, an upper clamping fixture, a middle clamping fixture, and a lower clamping fixture. The upper clamping fixture, the middle clamping fixture, and the lower clamping fixture are clamped together with the solenoid valve body structure to form the test piece. The test piece is fixedly connected to the frame body by the pneumatic grippers. The measuring equipment includes a laser displacement sensor and a tension / compression sensor located above the frame body for measuring the test piece, and a host computer that is communicatively connected to them.

[0011] The lower end of the lower clamping fixture is clamped on the pneumatic gripper, and the middle clamping fixture is set at the inner bottom. The solenoid valve body structure is located on the upper part of the middle clamping fixture, and the upper clamping fixture is fitted on the outside of the valve sleeve and armature. The middle clamping fixture is tightly connected to the return spring, and an adjustment shim is set between the bottom of the return spring and the bottom surface of the middle clamping fixture.

[0012] Furthermore, the upper end of the tension / compression sensor is fixedly connected to the upper part of the frame body via an upper connecting plate and a precision servo cylinder, and the lower end of the tension / compression sensor is connected to the upper end face of the valve stem of the valve core via a contact. The upper end of the laser displacement sensor is fixedly connected to the upper part of the frame body via a mounting bracket, and the lower end of the laser displacement sensor is connected to both the contact and the upper end of the valve stem of the valve core via a connecting reflector cap.

[0013] Furthermore, the reflective cap is provided with a magnetic latch, which tightly wraps around and connects to the outer side of the upper end of the valve stem on the upper part of the contact and valve core.

[0014] Furthermore, the lower outer contour structure of the armature is configured as a conical head, and the upper structure of the middle clamping fixture is configured as a conical groove that mates with it.

[0015] Furthermore, the cross-sectional dimension of the lower T-shaped head of the valve core is larger than the end face dimension of the return spring.

[0016] Furthermore, the frame body is composed of a lower base, an upper top plate, and a support column connecting the two, which are connected together by bolts, wherein the pneumatic gripper is fixedly connected to the upper end surface of the lower base by bolts.

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

[0018] 1) This utility model device, by designing a clamping frame and measuring equipment on the solenoid valve body structure, can directly measure the initial air gap of the solenoid valve with high precision through sensors, realize batch inspection of solenoid valves, improve the working efficiency of solenoid valves, and extend their service life.

[0019] 2) In this utility model device, the initial air gap of the solenoid valve is measured by a sensor, and the host computer can determine whether the initial air gap meets the standard, thereby determining the thickness of the adjusting shim, further ensuring product quality, and ensuring the reliability and convenience of measurement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 The right view;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the test piece in its free state;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure when the tested part is in the limited position.

[0024] In the diagram, 1-valve sleeve, 2-armature, 3-valve core, 4-reset spring, 5-adjusting shim, 6-upper clamping fixture, 7-middle clamping fixture, 8-lower clamping fixture, 9-pneumatic gripper, 10-frame body, 11-laser displacement sensor, 12-tension and compression sensor, 13-lower base, 14-upper top plate, 15-support column, 16-precision servo cylinder, 17-upper connecting plate, 18-contact, 19-reflector cap, 20-magnetic latch, 21-mounting bracket. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0026] Example: Figure 1 and Figure 2As shown, this utility model provides a device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjustment shim. It includes a solenoid valve body structure and a clamping and testing device. The solenoid valve body structure includes a valve sleeve 1, an armature 2, a valve core 3, and a return spring 4. The valve sleeve 1 and the armature 2 are in contact. The valve sleeve 1 has a through-cavity in the middle. The armature 2 has an inverted conical upper cavity and a cylindrical lower cavity connected to the upper cavity. The valve core 3 has a valve stem at the top and a T-shaped head at the bottom. It is positioned within the cavity of the valve sleeve 1 by moving up and down with the valve stem and within the upper cavity of the armature 2 by moving up and down with the T-shaped head. The upper end of the return spring 4 passes through the lower cavity and is vertically positioned within the upper cavity. The cross-sectional dimension of the lower T-shaped head of the valve core 3 is larger than the end face dimension of the return spring 4.

[0027] The clamping test device includes a clamping frame and measuring equipment. The clamping frame includes a frame body 10, a pneumatic gripper 9 installed at the bottom of the frame body 10, an upper clamping fixture 6, a middle clamping fixture 7, and a lower clamping fixture 8. The measuring equipment includes a laser displacement sensor 11 and a tension / compression sensor 12 connected above the frame body 10 for measuring the workpiece under test, and a host computer that is connected to them for communication.

[0028] The frame body 10 is composed of a lower base 13, an upper top plate 14, and a support column 15 connecting the two, which are connected together by bolts. The pneumatic gripper 9 is fixedly connected to the upper end face of the lower base 13 by bolts. The upper clamping fixture 6, the middle clamping fixture 7, and the lower clamping fixture 8 are clamped together with the solenoid valve body structure to form the test piece. The test piece is fixedly connected to the frame body 10 by the pneumatic gripper 9.

[0029] The lower end of the lower clamping fixture 8 is clamped on the pneumatic gripper 9, and the middle clamping fixture 7 is installed on the inner bottom. The solenoid valve body structure is located on the upper part of the middle clamping fixture 7. The lower outer contour structure of the armature 2 is set as a conical head, and the upper structure of the middle clamping fixture 7 is set as a conical groove that is connected to it. The upper clamping fixture 6 is fitted on the outside of the valve sleeve 1 and the armature 2. The return spring 4 is tightly connected inside the middle clamping fixture 7. An adjusting shim 5 is installed between the bottom of the return spring 4 and the bottom surface of the middle clamping fixture 7.

[0030] The upper end of the tension / compression sensor 12 is fixedly connected to the upper part of the frame body 10 via the upper connecting plate 17 and the precision servo cylinder 16. The lower end of the tension / compression sensor 12 is connected to the upper end face of the upper valve stem of the valve core 3 via the contact 18. The upper end of the laser displacement sensor 11 is fixedly connected to the upper part of the frame body 10 via the mounting bracket 21. The lower end of the laser displacement sensor 11 is connected to both the contact 18 and the upper end of the upper valve stem of the valve core 3 via the connecting reflector cap 19. A magnetic latch 20 is installed on the reflector cap 19. The magnetic latch 20 tightly wraps around and connects to the outside of the contact 18 and the upper end of the upper valve stem of the valve core 3.

[0031] Working principle and process:

[0032] During measurement, the solenoid valve body structure is first installed in the clamping test device, and the test results are transmitted and displayed through sensors and a host computer.

[0033] like Figure 3 As shown, when the valve stem at the top of the valve core 3 is not pressurized, the upper end face of the armature 2 is in contact with the lower end face of the valve sleeve 1 under the spring force of the return spring 4, and the gap between the upper end face of the armature 2 and the lower end face of the valve sleeve 1 is 0. At this time, the host computer records the current position of the laser displacement sensor 11 as x'.

[0034] like Figure 4 As shown, pressure is applied by the transmission of the precision servo cylinder 16 and transmitted to the valve stem on the upper part of the valve core 3 through the contact 18. At this time, the valve core 3 drives the armature 2 to move downward a certain distance under the pushing action of the precision servo cylinder 16. At this time, the host computer records the current position of the laser displacement sensor 11 as x.

[0035] The adjustment gap between the upper end face of armature 2 and the lower end face of valve sleeve 1 is set to ∆X. The host computer calculates ∆X=x”-x' based on the measurement results and automatically determines whether ∆X meets the air gap installation index requirements. If it does, the operation interface outputs "Adjustment shim thickness is qualified" and saves ∆X to the database. If it does not meet the requirements, it outputs "Adjustment shim thickness is too large / small, replace the shim and remeasure". Then the above operation steps are repeated until the requirements are met.

[0036] This utility model device, by designing a clamping frame and measuring equipment on the solenoid valve body structure, can directly measure the initial air gap of the solenoid valve with high precision through sensors, realize batch inspection of solenoid valves, improve the working efficiency of solenoid valves, and extend their service life.

[0037] In this device, the initial air gap of the solenoid valve is measured by a sensor, and the host computer can determine whether the initial air gap meets the standard, thereby determining the thickness of the adjusting shim, further ensuring product quality, and guaranteeing the reliability and convenience of measurement.

[0038] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A device for measuring the initial air gap of a solenoid valve and determining the thickness of an adjusting shim, characterized in that: The device includes a solenoid valve body structure and a clamping and testing device. The solenoid valve body structure includes a valve sleeve (1), an armature (2), a valve core (3), and a return spring (4). The valve sleeve (1) and the armature (2) are in contact. The middle part of the valve sleeve (1) is provided with a cavity that runs through the upper and lower parts. The upper part of the armature (2) is provided with an inverted cone-shaped movable upper cavity, and the lower part is provided with a cylindrical movable lower cavity that connects to the movable upper cavity. The upper part of the valve core (3) is provided with a valve stem, and the lower part is provided with a T-shaped head. The valve core (3) is movably disposed in the cavity of the valve sleeve (1) through the valve stem, and movably disposed in the movable upper cavity of the armature (2) through the T-shaped head. The upper end of the return spring (4) runs through the movable lower cavity and is vertically located in the movable upper cavity. The clamping test device includes a clamping frame and a measuring device. The clamping frame includes a frame body (10), a pneumatic gripper (9) set at the bottom of the frame body (10), an upper clamping fixture (6), a middle clamping fixture (7) and a lower clamping fixture (8). The upper clamping fixture (6), the middle clamping fixture (7) and the lower clamping fixture (8) are clamped together with the solenoid valve body structure to form the test piece. The test piece is fixedly connected to the frame body (10) by the pneumatic gripper (9). The measuring device includes a laser displacement sensor (11) and a tension / compression sensor (12) set above the frame body (10) for measuring the test piece, and a host computer that communicates with it. The lower end of the lower clamping fixture (8) is clamped on the pneumatic gripper (9), and the middle clamping fixture (7) is set at the bottom. The solenoid valve body structure is located on the upper part of the middle clamping fixture (7), and the upper clamping fixture (6) is fitted on the outside of the valve sleeve (1) and the armature (2). The middle clamping fixture (7) is tightly connected to the return spring (4), and an adjustment shim (5) is set between the bottom of the return spring (4) and the bottom surface of the middle clamping fixture (7).

2. The device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjusting shim according to claim 1, characterized in that: The upper end of the tension / compression sensor (12) is fixedly connected to the upper part of the frame body (10) via the upper connecting plate (17) and the precision servo electric cylinder (16) in sequence. The lower end of the tension / compression sensor (12) is connected to the upper end face of the valve stem of the valve core (3) via the contact (18). The upper end of the laser displacement sensor (11) is fixedly connected to the upper part of the frame body (10) via the mounting bracket (21). The lower end of the laser displacement sensor (11) is connected to the contact (18) and the upper end of the valve stem of the valve core (3) via the connecting reflector cap (19).

3. The device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjusting shim according to claim 2, characterized in that: The reflector cap (19) is provided with a magnetic latch (20), which is tightly wrapped and connected to the upper end of the valve stem of the contact (18) and the valve core (3).

4. The device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjusting shim according to claim 1, characterized in that: The lower outer contour structure of the armature (2) is set as a conical head, and the upper structure of the middle clamping fixture (7) is set as a conical groove that is connected to it.

5. The device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjusting shim according to claim 1, characterized in that: The cross-sectional dimension of the lower T-shaped head of the valve core (3) is larger than the end face dimension of the return spring (4).

6. The device for measuring the initial air gap of a solenoid valve and determining the thickness of the adjusting shim according to claim 1, characterized in that: The frame body (10) is composed of a lower base (13), an upper top plate (14) and a support column (15) connecting the two, which are connected together by bolts. The pneumatic gripper (9) is fixedly connected to the upper surface of the lower base (13) by bolts.

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