Mining three-proofing magnetic switch

Abstract

The utility model introduces a mining three-proofing magnetic switch, which relates to the technical field of mining electrical equipment and comprises a shell assembly, an induction and reset assembly and an electrical connection and conduction assembly. The shell assembly comprises an end cover, a main body, a rear shell and a mounting plate; the induction and reset assembly comprises a magnetic ring, a guide shaft and a reset spring; the electrical connection and conduction assembly comprises a copper electrode, an elastic probe, a conduction plate, a wiring terminal and an output cable. The shell assembly is compact in structure and reasonable in layout design, and provides protection and insulation for the induction and reset assembly and the electrical connection and conduction assembly which are installed in the shell assembly; due to the full-sealed structure and the magnetic induction principle without mechanical contacts, the generation of electric sparks is fundamentally avoided, and the explosion-proof switch is particularly suitable for environments with explosion-proof requirements such as mineral processing equipment; the overall structure is high in adaptability, and the downtime and the maintenance cost caused by switch faults are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mine electrical equipment, especially to a mine three -proof magnetic switch. BACKGROUND

[0002] In the ore dressing industry, the mechanical equipment switch is often in the industrial environment of damp, much dust, corrosive medium and high frequency vibration, the traditional proximity switch and mechanical stroke switch face the severe challenge:

[0003] Ordinary proximity switch: its plastic or metal shell is easy to age, break or be corroded in damp and corrosive environment, leads to sealing failure, internal circuit short circuit, failure rate is extremely high;

[0004] Mechanical stroke switch: its mechanical contact is easy to produce electric spark under high frequency action, and there is a security risk in the ore dressing environment containing inflammable and explosive gas;At the same time, the mechanical structure is easy to be jammed and oxidized due to dust and moisture invasion, leading to action failure;

[0005] The existing magnetic switch on the market: the magnet of ordinary magnetic switch is weak, and is easy to misoperation due to small displacement in the equipment with large vibration;If the material quality of reset spring and guide mechanism is poor, it is easy to fail due to corrosion and fatigue, leading to the switch unable to reset reliably, resulting in equipment failure;

[0006] Therefore, there is an urgent need for a magnetic switch that can adapt to harsh working conditions, has ultra-high reliability, long service life and intrinsic safety characteristics. INVENTION CONTENTS

[0007] The utility model discloses a mine three -proof magnetic switch, and the structure is firm, the sealing performance is excellent, the corrosion resistance, the fatigue resistance and the action sensitive reliable waterproof explosion -proof shock -proof magnetic switch are provided.

[0008] The utility model discloses the technical scheme that adopts:

[0009] A mine three -proof magnetic switch, including shell assembly, induction and reset assembly, electrical connection and conduction assembly;

[0010] The shell assembly includes end cover, main body, rear shell and mounting plate;The main body center is provided with a stepped through hole, and the main body rear end face is provided with a mounting groove around the stepped through hole;The end cover is arranged on the front end of the main body;The rear shell is arranged on the rear end of the main body, and the center is provided with a wire outlet hole;The mounting plate is arranged on the rear side of the rear shell;

[0011] The induction and reset assembly includes a magnetic ring, a guide shaft and a reset spring;The magnetic ring is arranged on the front end of the guide shaft and located in the stepped through hole of the front end of the main body;The reset spring is arranged on the outer edge of the rear end of the guide shaft and located in the stepped through hole of the rear end of the main body;

[0012] The electrical connection and conduction assembly comprises copper poles, elastic probes, a conduction plate, wiring terminals and an output cable; the copper poles are respectively arranged in opposite installation grooves at the rear end of the main body, and the elastic probes are respectively arranged on the copper poles; the conduction plate is arranged on the rear end of the guide shaft and located in the installation groove; the conduction plate is respectively arranged at the end of the elastic probe; the wiring terminals are respectively arranged in the installation grooves, one end of the wiring terminal is connected with the copper pole, and the other end is connected with the inner end of the output cable; the outer end of the output cable is arranged through the wire outlet hole of the rear shell.

[0013] Specifically, the end cover, the main body and the rear shell are an integrated structure of ceramic sintering, the front end faces of the main body and the rear shell are both provided with a sealing ring groove, the end cover and the main body, the main body and the rear shell are connected through screws, and the sealing ring grooves are both provided with a sealing ring.

[0014] Specifically, the installation grooves on the rear end of the main body are sequentially arranged around the central stepped through hole, and the two sides in the vertical direction are both extended to the front end of the main body to form the stepped copper pole installation grooves; the conduction plate installation groove is formed between the two copper pole installation grooves corresponding to the stepped through hole; and the two sides in the horizontal direction are the wiring terminal installation grooves.

[0015] More specifically, the copper pole is provided with three installation holes, the middle installation hole of the copper pole is used for fixing the copper pole in the copper pole installation groove through a screw, and the other two installation holes are respectively used for installing the elastic probe and the wiring terminal.

[0016] More specifically, the wiring terminal is a Y-shaped wire lug, and one end of the Y-shaped wire lug is fixed on the installation hole of the copper pole through a screw.

[0017] Specifically, the inner cavity of the rear shell corresponds to the outer contour of the rear end installation groove of the main body, and the installation plate is provided with a wire passing hole corresponding to the wire outlet hole of the rear shell.

[0018] More specifically, the installation plate is provided with an arc-shaped slot hole around the wire passing hole, which facilitates the screw connection between the installation plate and the rear shell.

[0019] Specifically, the wire outlet hole in the center of the rear shell is provided with a waterproof connector for installing the output cable, and the waterproof connector comprises a rubber sealing sleeve, a clamping claw and a locking nut.

[0020] Due to the adoption of the technical scheme, the utility model has the following advantages:

[0021] The step through hole in the main body of the shell assembly is compact in structure with the mounting groove, the layout design is reasonable, the industrial ceramic is integrally fired, the hardness is high, the wear resistance is excellent, the electrical insulation performance is superior, and the corrosion of chemical solvents can be resisted, the rear shell inner cavity and the main body mounting groove form a sealed cavity, and the induction and reset assembly and the electrical connection and conduction assembly installed in the interior are provided with protection and insulation; the sealing ring is arranged between the main body and the end cover and between the main body and the rear shell, the combination of the ceramic shell and the rubber sealing ring is compressed when being fastened by the screw, so that reliable static sealing is formed, and external moisture, dust and corrosive gas are effectively isolated; the guide shaft provides accurate linear motion trajectory for the magnetic ring and the reset spring, ensures smooth action, no jamming and high stability; the strong magnetic force of the magnetic ring can still reliably trigger the switch when the installation position is changed due to equipment vibration, the strength and stability of the trigger signal are ensured, the anti-interference ability is high, and the probability of false alarm and missed alarm is greatly reduced; the reset spring can work for a long time under high frequency and high load conditions without plastic deformation or fracture, and the service life of the switch and the reliable reset performance are ensured; the fully-sealed structure and the magnetic induction principle without mechanical contact fundamentally eliminate the generation of electric sparks, and are especially suitable for environments with explosion-proof requirements such as ore dressing equipment; the overall structure has high matching degree, and the downtime and maintenance cost caused by switch failure are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall schematic view of the utility model.

[0023] Figure 2 It is the contour perspective schematic view of the step through hole and the mounting groove in the main body of the utility model.

[0024] Figure 3 It is the rear end surface schematic view of the main body of the utility model.

[0025] Figure 4 It is the schematic view of the main body of the utility model after installing other components.

[0026] Figure 5 It is Figure 4 The schematic view after removing the conduction plate.

[0027] Figure 6 It is the connection schematic view of the induction and reset assembly and the electrical connection and conduction assembly of the utility model.

[0028] Figure 7 It is the schematic view of the connection of the rear shell and the output cable of the utility model.

[0029] In the figure: 1-end cover, 2-main body, 3-rear shell, 4-mounting plate, 5-magnetic ring, 6-guide shaft, 7-return spring, 8-copper pole, 10-elastic probe, 11-conducting plate, 12-terminal, 13-output cable, 14-mounting groove, 141-copper pole mounting groove, 142-conducting plate mounting groove, 143-terminal mounting groove, 15-step through hole, 16-waterproof joint, 17-sealing ring. DETAILED DESCRIPTION

[0030] The utility model will be further explained in connection with the drawings and examples, cannot define the protection scope of the utility model with this, the purpose of disclosing the utility model is to protect all technical improvements within the scope of the utility model.

[0031] In connection with the drawings Figures 1-7 The utility model discloses a mine three proof magnetic switch, including shell subassembly, induction and reset subassembly, electrical connection and conducting subassembly.

[0032] Shell subassembly includes end cover 1, main body 2, rear shell 3 and mounting plate 4, the main body 2 center is provided with step through hole 15, and the main body 2 rear end face is provided with mounting groove 14 that is sequentially connected in head and tail around step through hole 15, and the copper pole mounting groove 141 of the step structure is formed to the main body 2 front end direction in the vertical direction on both sides. The conducting plate mounting groove 142 is formed between the two copper pole mounting grooves 141 and corresponds to the step through hole 15. The terminal mounting groove 143 is on the horizontal direction on both sides.

[0033] End cover 1 is arranged on the main body 2 front end, and rear shell 3 is arranged on the main body 2 rear end, and the rear shell 3 inner chamber corresponds to the main body 2 rear end mounting groove 14 contour, and the waterproof joint 16 for the output cable 13 installation is arranged in the outlet hole in the center of rear shell 3, and the waterproof joint 16 includes rubber sealing sleeve, clamping jaw and locking nut, and the mounting plate 4 is arranged on the rear side of rear shell 3, and the mounting plate 4 is provided with the wire hole corresponding to the outlet hole of rear shell 3, and the arc-shaped slot hole is arranged around the wire hole, which is convenient for the mounting plate 4 and rear shell 3 to be connected through screws, and the end cover 1, main body 2 and rear shell 3 are all integrated structures of alumina ceramic sintering, which can resist the erosion and abrasion of sand and dust, and can isolate the corrosion of corrosive medium, and the main body 2 and rear shell 3 are all provided with sealing ring grooves on the front end face, and the end cover 1 and main body 2, main body 2 and rear shell 3 are all connected through screws, and the sealing ring 17 is arranged in the sealing ring groove. The sealing ring 17 adopts corrosion-resistant fluorine rubber FKM or EPDM, which can effectively prevent external moisture, dust and corrosive liquid from invading from the front of the switch.

[0034] The induction and reset assembly includes a magnetic ring 5, a guide shaft 6 and a reset spring 7. The magnetic ring 5 is arranged on the front end of the guide shaft 6 and located in the stepped through hole 15 at the front end of the main body 2. The magnetic ring 5 is made of neodymium iron boron, which has strong magnetic force, can provide a larger action induction distance and a more definite signal, and has strong anti-vibration interference capability. The reset spring 7 is arranged on the outer edge of the rear end of the guide shaft 6 and located in the stepped through hole 15 at the rear end of the main body 2. The reset spring 7 is made of 65Mn high-carbon manganese steel, which has a high elastic limit, a fatigue strength and excellent impact toughness, thereby ensuring the service life of the switch for billions of times and reliable reset performance. The guide shaft 6 is made of SUS304 or SUS316, which has excellent rust-proof and corrosion-resistant performance. The smooth surface and accurate diameter of the guide shaft 6 ensure that the reset action is smooth and free of jamming.

[0035] The electrical connection and conduction assembly includes a copper pole 8, an elastic probe 10, a conduction plate 11, a wiring terminal 12 and an output cable 13. The copper pole 8 is arranged in the copper pole mounting groove 141 on both sides of the rear end of the main body 2 respectively. Three mounting holes are arranged on the copper pole 8. The mounting hole in the middle of the copper pole 8 is used for fixing the copper pole 8 in the copper pole mounting groove 141 by a screw. The other two mounting holes are used for mounting the elastic probe 10 and the wiring terminal 12 respectively. The copper pole 8 is made of high-conductivity brass or red copper, and the surface is plated with silver or tin to enhance the conductivity and prevent oxidation.

[0036] The elastic probe 10 is arranged in the mounting hole of the copper pole 8 respectively, and the needle shaft head is plated with gold to ensure low resistance and arc resistance. The conduction plate 11 is arranged on the rear end of the guide shaft 6 by a screw and located in the conduction plate mounting groove 142. The conduction plate 11 is arranged at the ends corresponding to the ends of the elastic probe 10 respectively. The conduction plate 11 is made of phosphor bronze or beryllium copper to ensure the stability and life of the contact. The wiring terminal 12 is a Y-shaped wire lug. The wiring terminal 12 is arranged in the wiring terminal mounting groove 143 respectively. One end of the Y-shaped wire lug is fixed on the mounting hole of the copper pole 8 by a screw to connect with the copper pole 8, and the other end is connected with the inner end of the output cable 13. The Y-shaped opening design facilitates installation and fastening, can provide a larger contact area and more reliable mechanical locking than a straight insertion type wire lug.

[0037] The outer end of the output cable 13 is arranged through the wire outlet hole of the rear shell 3. The output cable 13 is a flexible cable with heavy PVC or PUR sheath, which has excellent oil resistance, acid and alkali resistance, bending resistance and tear resistance.

[0038] In use, the switch is installed on the detection position through the mounting plate 4 and the screw; the end cover 1 is directed towards the direction of the measured object; when the measured object approaches, the magnetic ring 5 generates a magnetic force with the measured object; under the action of the magnetic force, the magnetic ring 5 moves in the direction of the end cover 1 in the stepped through hole 15 of the main body 2, and further drives the guide shaft 6 and the guide plate 11 at the rear end of the guide shaft 6 to move; the guide plate 11 compresses the reset spring 7 and when the guide plate 11 moves to contact the elastic probe 10 on the copper pole 8, the guide plate 11, the copper pole 8, the wiring terminal 12 and the output cable 13 complete the circuit conduction connection; when the measured object moves away, the magnetic force disappears; under the reset force of the reset spring 7, the guide plate 11 is pushed out in the direction of the rear shell 3; the guide plate 11 is disconnected with the elastic probe 10; the guide shaft 6 drives the magnetic ring 5 to retreat and reset; the switch is turned off.

[0039] The part not described in the utility model is the prior art.

[0040] In order to disclose the invention purpose of the utility model, the embodiments selected in the text are currently considered to be appropriate, but it should be understood that the utility model aims to include all changes and improvements of all embodiments within the scope of the concept and utility model.

Claims

1. A mine-used three-proof magnetic switch, characterized in that, The shell assembly, the induction and reset assembly, and the electrical connection and conduction assembly are provided. The shell assembly comprises an end cover, a main body, a rear shell, and a mounting plate. The induction and reset assembly comprises a magnetic ring, a guide shaft, and a reset spring. The electrical connection and conduction assembly comprises copper poles, elastic probes, a conduction plate, wire terminals, and an output cable.

2. The mine use three-proof magnetic switch according to claim 1, characterized in that: The end cover, the main body, and the rear shell are integrally formed by ceramic sintering.

3. The mine use three-proof magnetic switch according to claim 1, characterized in that: The mounting slots on the rear end of the main body are sequentially connected head to tail around the stepped through hole in the center, and the copper pole mounting slots are formed by extending the two copper pole mounting slots in the vertical direction towards the front end of the main body.

4. The mine use three-proof magnetic switch according to claim 3, characterized in that: Three mounting holes are provided on the copper pole.

5. The mine-duty three-proof magnetic switch of claim 4, wherein: The wire terminals are Y-shaped wire ears.

6. The mine use three-proof magnetic switch according to claim 1, characterized in that: The waterproof connector is provided in the wire outlet hole in the center of the rear shell for mounting the output cable.

7. The mine-duty three-proof magnetic switch of claim 6, wherein: The waterproof connector comprises a rubber sealing sleeve, a clamping claw, and a locking nut.

8. The mine use three-proof magnetic switch according to claim 1, characterized in that: ​

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