Airtightness testing device for magnetic core tube of electromagnet
By designing an electromagnet core tube airtightness testing device, automated testing is achieved using pressure sensors and high-pressure air sources. This solves the problem of unstable test results caused by reliance on manual visual inspection in existing technologies, and improves the reliability and efficiency of testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANYANG KAIDI MAGNETIC TECH CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-01
AI Technical Summary
Existing methods for testing the airtightness of electromagnet core tubes rely on manual visual inspection. The reliability of the test results depends on the conscientiousness of the inspectors, and the testing efficiency is low.
Design an electromagnet core tube airtightness testing device to automatically detect the airtightness of the core tube using a pressure sensor and a high-pressure air source, and determine the sealing effect through the pressure sensor to achieve automated testing.
It enables automated airtightness testing without manual monitoring, improving the reliability and efficiency of test results.
Smart Images
Figure CN224189459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to electromagnets, and in particular to an electromagnet core tube airtightness testing device, belonging to the technical field of electromagnet production equipment. Background Technology
[0002] In the production of electromagnets, after the valve electromagnet core tube is assembled, it is necessary to test the sealing effect of the sealing components, and test whether the passage part and sealing ring meet the sealing requirements. The existing testing method is to use a special connector to connect to the core tube, then pass high-pressure air into the core tube and immerse the core tube in water. Inspectors visually judge whether there are bubbles coming out of the sealing part of the core tube. This method requires manual monitoring and depends entirely on the visual judgment of the inspectors. It requires specialized testing personnel, and the reliability of the test results is highly related to the person's sense of responsibility. Summary of the Invention
[0003] The purpose of this invention is to overcome the aforementioned problems in the existing electromagnet core tube airtightness testing and to provide an electromagnet core tube airtightness testing device.
[0004] To achieve the purpose of this utility model, the following technical solution is adopted: an electromagnet core tube airtightness testing device, comprising a base, a blind-hole cavity for the Rongnan core tube opened on the base, a pressure sensor installed inside the cavity, an annular sealing gasket installed at the upper opening of the cavity, a pressure ring pressed on the annular sealing gasket, the pressure ring being fixedly connected to a screw hole opened on the upper end face of the base by screws, the diameter of the center hole of the pressure ring being larger than the diameter of the center hole of the sealing gasket, the diameter of the annular sealing gasket being smaller than the diameter of the flange on the core tube, the diameter of the flange being adapted to the diameter of the center hole of the pressure ring, and the core tube... When the tube is inserted into the cavity, the lower end face of the flange presses on the sealing gasket, and the circumferential surface is located in the central hole of the pressure ring. The upper end face of the flange is higher than the upper end face of the pressure ring. A test cap is set above the pressure base. The test cap is installed on the operating end of the press. The test cap has a receiving cavity corresponding to the upper and lower parts of the magnetic core tube. The receiving cavity is adapted to the outer circumference of the magnetic core tube. A high-pressure air source is connected to the receiving cavity. A sealing ring is installed at the neck of the magnetic core tube. When the test cap presses on the upper end face of the flange, the sealing ring is squeezed, and the sealing ring forms a seal with the circumferential wall of the receiving cavity. The pressure sensor is connected to the controller.
[0005] Furthermore, a chamfer is machined on the lower end face of the receiving cavity, and when the test cap is pressed on the upper end face of the flange, the chamfer presses the sealing ring tightly.
[0006] Furthermore, an air passage communicating with the receiving cavity is provided on the side of the test cap, and compressed air is connected to the air passage.
[0007] Furthermore, a test chamber communicating with a blind hole-shaped cavity is provided on the base, and a pressure sensor is installed inside the test chamber.
[0008] The positive and beneficial technical effects of this utility model are as follows: This device can complete the airtightness test of magnetic core tubes. The test process does not rely on manual monitoring at all, and the test results are reliable. The specific implementation method is described in detail below. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation
[0010] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.
[0011] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1. Test cap; 2. Sealing ring; 3. Sealing gasket; 4. Pressure ring; 5. Copper overlay strip on the magnetic core tube; 6. Sealing ring for the manual push rod of the magnetic core tube; 7. Outer sealing ring for the cap of the magnetic core tube; 8. Base; 9. Flange; 10. Receiving cavity; 11. Air passage; 12. Test cavity; 13. Screw; 14. Cavity. The sealing ring is also called the threaded sealing ring of the magnetic core tube; neck sealing ring; 15. Chamfer; 16. Magnetic core tube.
[0012] As shown in the attached figure, an electromagnet core tube airtightness testing device includes a base 8, a blind hole-shaped cavity 14 for the Rongnan core tube is opened on the base, and a pressure sensor is installed in the cavity. In this embodiment, a test cavity 12 communicating with the blind hole-shaped cavity is opened on the base, the pressure sensor is installed in the test cavity, and the test cavity is sealed from the outside.
[0013] An annular sealing gasket 3 is installed at the upper opening of the cavity, and a pressure ring 4 is pressed on the annular sealing gasket 3. The pressure ring is fixedly connected to the screw hole opened on the upper end face of the base by screws 13. The diameter of the central hole of the pressure ring is larger than the diameter of the central hole of the sealing gasket, and the diameter of the annular sealing gasket is smaller than the diameter of the flange 9 on the magnetic core tube. The diameter of the flange 9 is adapted to the diameter of the central hole of the pressure ring. When the magnetic core tube 16 is inserted into the cavity, the lower end face of the flange is pressed on the sealing gasket, the circumferential surface is located in the central hole of the pressure ring, and the upper end face of the flange is higher than the upper end face of the pressure ring. A test pressure cap 1 is set above the pressure base. The test pressure cap is installed on the operating end of the press. The test pressure cap has a receiving cavity 10 corresponding to the upper and lower parts of the magnetic core tube. The receiving cavity is adapted to the outer circumference of the magnetic core tube. A high-pressure air source is connected to the receiving cavity. In this embodiment, an air passage 11 communicating with the receiving cavity is opened on the side of the test pressure cap, and compressed air is connected to the air passage. A sealing ring 2 (the sealing ring is the existing configuration on the magnetic core tube) is installed at the neck of the magnetic core tube. When the test cap presses against the upper end face of the flange, the sealing ring is squeezed, and the sealing ring forms a seal with the peripheral wall of the receiving cavity. In this embodiment, a chamfer 15 is machined on the lower end face of the receiving cavity. When the test cap presses against the upper end face of the flange, the chamfer presses the sealing ring tightly. The pressure sensor is connected to the controller.
[0014] When using this device, the magnetic core tube 16 to be tested is placed into the cavity 14 of the base. The test cap is pressed tightly with a press, and high-pressure air is injected into the air inlet of the test cap. The threaded sealing ring of the magnetic core tube isolates the pressure chamber from the outside, forming a high-pressure chamber. The magnetic core tube is filled with high-pressure air. The test chamber sealing gasket at the flange of the magnetic core tube forms a sealed test chamber between the outside of the magnetic core tube and the inside of the cavity. If there is leakage at the copper overlay strip of the magnetic core tube, the sealing ring of the manual push rod of the magnetic core tube, or the sealing ring of the outer sealing ring of the cap of the magnetic core tube within one minute, the pressure in the test chamber will increase. The pressure sensor will generate a corresponding pressure signal. The controller connected to the pressure sensor can identify the pressure change. The pressure sensor can automatically determine the airtightness of the magnetic core tube.
[0015] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.
Claims
1. A device for testing the airtightness of an electromagnet core tube, comprising a base, characterized in that: A blind-hole cavity containing a Rongnan magnetic core tube is formed on the base. A pressure sensor is installed inside the cavity. An annular sealing gasket is installed at the upper opening of the cavity, and a pressure ring is pressed onto the annular sealing gasket. The pressure ring is fixedly connected to a screw hole on the upper end face of the base by screws. The diameter of the center hole of the pressure ring is larger than the diameter of the center hole of the sealing gasket, and the diameter of the annular sealing gasket is smaller than the diameter of the flange on the magnetic core tube. The diameter of the flange is adapted to the diameter of the center hole of the pressure ring. When the magnetic core tube is inserted into the cavity, the lower end face of the flange presses against the sealing gasket. The test cap is located in the center hole of the pressure ring. The upper end face of the flange is higher than the upper end face of the pressure ring. A test cap is set above the pressure base. The test cap is installed on the operating end of the press. The test cap has a receiving cavity corresponding to the upper and lower parts of the magnetic core tube. The receiving cavity is adapted to the outer circumference of the magnetic core tube. A high-pressure air source is connected to the receiving cavity. A sealing ring is installed at the neck of the magnetic core tube. When the test cap is pressed on the upper end face of the flange, the sealing ring is squeezed and a seal is formed between the sealing ring and the peripheral wall of the receiving cavity. The pressure sensor is connected to the controller.
2. The electromagnet core tube airtightness testing device according to claim 1, characterized in that: The lower end face of the cavity is chamfered. When the test cap is pressed against the upper end face of the flange, the chamfered part presses against the sealing ring.
3. The electromagnet core tube airtightness testing device according to claim 1, characterized in that: An air passage communicating with the receiving cavity is provided on the side of the test cap, and compressed air is connected to the air passage.
4. The electromagnet core tube airtightness testing device according to claim 1, characterized in that: A test chamber communicating with a blind hole-shaped cavity is provided on the base, and the pressure sensor is installed in the test chamber.