Nuclear-grade magnetic switch

Abstract

The invention discloses a nuclear-grade magnetic switch which comprises a magnetic rod and a limit switch used in cooperation with the magnetic rod. The limiting switch is characterized by comprising a limiting switch shell, a sleeve assembly installed in the limiting switch shell, a microswitch installed on the sleeve assembly, a magnetic attraction rod movably installed in the sleeve assembly and facilitating magnetic conduction, and a switch connector installed in the limiting switch shell and connected with the microswitch. One end of the magnetic suction rod is provided with a non-metal piece connected with the microswitch, and the other end of the magnetic suction rod is connected with a high-temperature-resistant customized magnet. The customized magnet is mounted at one end of the magnetic rod, and the non-metal part is mounted at the other end of the magnetic rod and is in contact with the microswitch, so that the high-temperature customized magnet in the limit switch is attracted to move along with the magnetic rod by radially or axially approaching the limit switch for a certain distance; the high-temperature customized magnet drives the magnetic suction rod to move to displace the force transmission rod so as to realize the on-off of the microswitch contact, thereby reducing the complexity of the transmission structure and improving the anti-shock strength.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic switches, and in particular to a nuclear-grade magnetic switch. Background Art

[0002] As one of the key electrical components in the field of nuclear power, the requirements for various indicators of nuclear-grade magnetic switches are extremely strict. Once a nuclear accident occurs, no matter how the environmental conditions change, the nuclear-grade magnetic switches should not be damaged or malfunction within the specified time. At present, the nuclear-grade magnetic switches that can meet various harsh conditions and can be used normally have not been launched on the market on a large scale in China. Therefore, nuclear-grade magnetic switches are usually purchased from abroad to meet the requirements of use, but the cost of purchasing from abroad is high, which increases the cost of use. For this reason, in response to the call of the country, a nuclear-grade magnetic switch that can reduce the cost of use has been independently developed. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a nuclear-grade magnetic switch.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a nuclear-grade magnetic switch, comprising a magnetic rod and a limit switch used in conjunction with the magnetic rod; the characteristic is that the limit switch comprises a limit switch housing, a sleeve assembly installed in the limit switch housing, a micro switch installed on the sleeve assembly, a magnetic rod movably installed in the sleeve assembly for easy magnetic conduction, and a switch connector installed in the limit switch housing and connected to the micro switch; one end of the magnetic rod is equipped with a non-metallic part connected to the micro switch, and the other end is connected to a high-temperature resistant customized magnet.

[0005] Preferably, the sleeve assembly comprises a sleeve and a protective rod connected to the sleeve and guiding the magnetic attraction rod.

[0006] Preferably, a spring is installed between one end of the magnetic attraction rod and the limit switch housing, and the spring is outside the customized magnet.

[0007] Preferably, the micro switch is also provided with a force transmission rod which contacts the non-metallic part on the magnetic attraction rod and can reduce wear.

[0008] Preferably, a connector housing fixed inside the limit switch housing is installed outside the switch connector.

[0009] Preferably, a plug connector for connecting a cable is plugged into the switch connector; a first mating connector is installed outside the plug connector; and a quick connector for fixing the first mating connector is installed on the limit switch housing.

[0010] Preferably, an earless clamping ring for limiting the position of the plug connector is installed in the first fitting.

[0011] Preferably, a sealing gasket and a corrugated spring gasket are respectively installed between the first fitting and the limit switch housing and the quick connector.

[0012] Preferably, a second fitting is installed on the first fitting.

[0013] Preferably, the first mating connector, the second mating connector and the limit switch housing are all filled with epoxy resin.

[0014] The beneficial effects of the present invention are as follows: a customized magnet is installed on one end of the magnetic rod, and a non-metallic part is installed on the other end to contact the micro switch. As the magnetic rod approaches the limit switch by a certain distance in the radial or axial direction, the high-temperature customized magnet inside the limit switch is attracted to move. The high-temperature customized magnet drives the magnetic rod to move and causes the force transmission rod to displace to realize the on and off of the micro switch contacts, thereby reducing the complexity of the transmission structure and improving the anti-seismic strength. By installing non-metallic parts on the magnetic rod to contact the force transmission rod, the wear of the force transmission rod is reduced and the service life is increased; By using customized magnets made of high temperature resistant materials, the magnetic force of the customized magnets will not change significantly at high temperatures, thereby improving the stability of use and the strength of shock resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Figure 3 It is a schematic diagram of the local structure of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the sleeve assembly of the present invention.

[0019] Legend: 1. Magnetic rod; 2. Limit switch; 201. Limit switch housing; 202. Sleeve; 203. Micro switch; 204. Magnetic rod; 205. Switch connector; 206. Non-metallic parts; 207. Customized magnet; 208. Protection rod; 209. Spring; 210. Force transmission rod; 211. Connector housing; 212. Plug connector; 213. First connector; 214. Quick connector; 215. Earless clamp; 216. Sealing gasket; 217. Corrugated spring gasket; 218. Second connector; 219. Epoxy resin. DETAILED DESCRIPTION

[0020] Next, we further explain the nuclear-grade magnetic switch of the present invention with reference to the accompanying drawings.

[0021] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See attached Figure 1-4As shown, in this embodiment, a nuclear-grade magnetic switch comprises a magnetic rod 1 and a limit switch 2 used in conjunction with the magnetic rod 1; the limit switch 2 comprises a limit switch housing 201, a sleeve assembly installed in the limit switch housing 201, a micro switch 203 installed on the sleeve assembly, a magnetic rod 204 movably installed in the sleeve assembly for easy magnetic conduction, and a switch connector 205 installed in the limit switch housing 201 and connected to the micro switch 203; the magnetic rod 204 can be made of 430F material, which is corrosion-resistant and easy to cut, and is convenient to operate. The magnetic rod 204 is provided with a non-metallic part 206 connected to the micro switch 203 at one end, and a high temperature resistant custom magnet 207 is connected to the other end; the custom magnet 207 is a samarium cobalt magnet, which does not demagnetize at 350°C, and has no obvious change in magnetic force within a short time above 350°C; the sleeve assembly includes a sleeve 202 and a protective rod 208 connected to the sleeve 202 and guiding the magnetic rod 204; a spring 209 is installed between one end of the magnetic rod 204 and the limit switch housing 201, and the spring 209 The micro switch 203 is outside the customized magnet 207; the micro switch 203 is also equipped with a force transmission rod 210 that contacts the non-metallic part 206 on the magnetic rod 204 and can reduce wear; the non-metallic part 206 can use a rubber shaft; the customized magnet 207 is installed on one end of the magnetic rod 204, and the non-metallic part 206 is installed on the other end to contact the micro switch 203. As the magnetic rod 1 approaches the limit switch 2 by a certain distance in the radial or axial direction, it attracts the high-temperature customized magnet 207 inside the limit switch 2 to move, and the high-temperature customized magnet drives the magnetic rod to move. The force transmission rod is displaced to realize the on and off of the micro switch contacts, thereby reducing the complexity of the transmission structure and improving the seismic strength; by installing a non-metallic part 206 on the magnetic attraction rod 204 to contact the force transmission rod 210, the wear of the force transmission rod 210 is reduced and the service life is increased; by using a customized magnet 207 made of high-temperature resistant material, the magnetic force of the customized magnet 207 will not change significantly at high temperature, thereby improving the stability of use and the seismic strength.

[0024] See attached Figure 2As shown, the switch connector 205 is provided with a connector housing 211 fixed inside the limit switch housing 201 on the outside; a plug connector 212 for connecting a cable is plugged into the switch connector 205; a first connector 213 is provided outside the connector 212; a quick connector 214 for fixing the first connector 213 is provided on the limit switch housing 201; an earless clamping ring 215 for limiting the connector 212 is also provided inside the first connector 213; a sealing gasket 216 and a corrugated spring gasket 217 are provided between the first connector 213 and the limit switch housing 201 and the quick connector 214, respectively; the plug connector 212 is limited by using the earless clamping ring 215, thereby facilitating the limited installation of the plug connector 212; the corrugated spring gasket 217 is used to reduce the anti-impact force between the first connector 213 and the quick connector 214, and at the same time, the loosening between the first connector 213 and the quick connector 214 can also be prevented.

[0025] See attached Figure 2 As shown, the second connector 218 is installed on the first connector 213; the first connector 213, the second connector 218 and the limit switch housing 201 are all filled with epoxy resin 219; the first connector 213, the second connector 218 and the limit switch housing 201 are all filled with epoxy resin 221, thereby facilitating the sealing of the first connector 213, the second connector 218 and the limit switch housing 201.

[0026] During the use of the present invention, when the magnetic rod 1 approaches, the customized magnet 207 and the magnetic rod 1 produce an attractive reaction, the customized magnet 207 drives the magnetic rod 204 to move, and at the same time compresses the spring 209, the magnetic rod 204 drives the non-metallic part 206 to move, and the force transmission rod 210 connected to the non-metallic part 206 and the micro switch 203 is separated. At this time, the magnetic rod 1 is connected to the limit switch 2, and when the magnetic rod 1 moves away, the customized magnet 207 and the magnetic rod 1 do not react, and the elasticity of the spring 209 itself is used to push the magnetic rod 204 to reset, the magnetic rod 204 drives the customized magnet 207 and the non-metallic part 206 to reset, so that the non-metallic part 206 is in contact with the force transmission rod 210 connected to the micro switch 203, and the non-metallic part 206 drives the force transmission rod 210 to move. The displacement of the force transmission rod 210 causes the contacts of the micro switch 203 to change, thereby realizing the on and off of the internal contacts of the micro switch 203.

[0027] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A nuclear-grade magnetic switch, comprising a magnetic rod (1) and a limit switch (2) used in conjunction with the magnetic rod (1); wherein: The limit switch (2) comprises a limit switch housing (201), a sleeve assembly installed in the limit switch housing (201), a micro switch (203) installed on the sleeve assembly, a magnetic attraction rod (204) movably installed in the sleeve assembly for easy magnetic conduction, and a switch connector (205) installed in the limit switch housing (201) and connected to the micro switch (203); one end of the magnetic attraction rod (204) is installed with a non-metallic part (206) connected to the micro switch (203), and the other end is connected to a high temperature resistant customized magnet (207).

2. A nuclear-grade magnetic switch according to claim 1, characterized in that: The sleeve assembly comprises a sleeve (202) and a protection rod (208) connected to the sleeve (202) and having a guiding function for the magnetic attraction rod (204).

3. A nuclear-grade magnetic switch according to claim 2, characterized in that: A spring (209) is installed between one end of the magnetic attraction rod (204) and the limit switch housing (201), and the spring (209) is located outside the customized magnet (207).

4. The nuclear-grade magnetic switch according to claim 1, characterized in that: The micro switch (203) is also provided with a force transmission rod (210) which contacts the non-metallic part (206) on the magnetic attraction rod (204) and can reduce wear.

5. The nuclear-grade magnetic switch according to claim 1, characterized in that: A joint housing (211) fixed inside the limit switch housing (201) is installed outside the switch joint (205).

6. A nuclear-grade magnetic switch according to claim 5, characterized in that: The switch connector (205) is plugged with a plug connector (212) for connecting a cable; a first mating connector (213) is installed outside the plug connector (212); and a quick connector (214) is installed on the limit switch housing (201) for fixing the first mating connector (213).

7. A nuclear-grade magnetic switch according to claim 6, characterized in that: An earless clamping ring (215) for limiting the position of the plug connector (212) is also installed in the first mating connector (213).

8. The nuclear-grade magnetic switch according to claim 6, characterized in that: A sealing gasket (216) and a corrugated spring gasket (217) are respectively installed between the first fitting (213), the limit switch housing (201) and the quick connector (214).

9. The nuclear-grade magnetic switch according to claim 6, characterized in that: A second matching head (218) is mounted on the first matching head (213).

10. A nuclear-grade magnetic switch according to claim 9, characterized in that: The first mating connector (213), the second mating connector (218) and the limit switch housing (201) are all filled with epoxy resin (219).

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