A power off switch

Abstract

The present invention discloses a power-off switch, which belongs to the field of explosion-proof technology. The power-off switch comprises: a box body is fixedly arranged in the explosion-proof switch cavity; an operating rod passes through the explosion-proof switch cavity and the box body in sequence and is fixedly connected with two moving contacts; a partition is fixedly arranged in the box body, and two through holes are provided on the partition body; the fixed ends of the two slider assemblies are fixedly connected with the box body, and the action ends of the two slider assemblies can be slidably arranged on the partition body, the two slider assemblies correspond to the two through holes one by one, and the action ends of the slider assemblies can cover the corresponding through holes; the two static contacts are fixedly connected with the box body, the two static contacts correspond to the two moving contacts one by one, the two through holes correspond to the two moving contacts one by one, and the moving contacts can pass through the corresponding through holes and contact the corresponding static contacts. The power-off switch of the present invention can reach the Ma protection level, ensure the safe power-off of the battery, and ensure the safety in the state of gas outburst.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proofing, and in particular to a power-off switch. Background Art

[0002] As intelligent and unmanned equipment in coal mines develop more and more rapidly, battery power is becoming more and more common. To ensure the safety of battery power, in case of gas outburst or when the battery needs to stop output, a power-off switch should be set, and the battery power should stop output immediately, and it should not be automatically restored.

[0003] Most of the power-off switches currently in use are flameproof switches, which are placed in flameproof enclosures and have poor safety protection effects. They do not meet the requirements in places with gas outbursts. Summary of the invention

[0004] The invention provides a power-off switch, which solves or partially solves the technical problem that the flameproof switch in the prior art has poor protection effect and does not meet the requirements in places with gas outburst.

[0005] In order to solve the above technical problems, the present invention provides a power-off switch including: a flameproof switch cavity, an operating rod and a switch device; the switch device includes: a box, a partition, two moving contacts, two static contacts and two slider assemblies; the box is fixedly arranged in the flameproof switch cavity; the operating rod passes through the flameproof switch cavity and the box in sequence and is fixedly connected to the two moving contacts; the partition is fixedly arranged in the box, and two through holes are provided on the partition; the fixed ends of the two slider assemblies are fixedly connected to the box, the action ends of the two slider assemblies can be slidably arranged on the partition, the two slider assemblies correspond one-to-one to the two through holes, and the action ends of the slider assemblies can cover the corresponding through holes; the two static contacts are fixedly connected to the box, the two static contacts correspond one-to-one to the two moving contacts, the two through holes correspond one-to-one to the two moving contacts, and the moving contacts can pass through the corresponding through holes to contact the corresponding static contacts.

[0006] Furthermore, the slider assembly includes: a slider, a guide rod and an elastic member; the first end of the guide rod is fixedly connected to the box; the slider is slidably mounted on the second end of the guide rod; the elastic member is mounted on the guide rod, and the elastic member is arranged between the slider and the inner wall of the box.

[0007] Furthermore, a slope is provided on the end surface of the sliding block facing away from the movable contact member.

[0008] Furthermore, a first sliding hole is provided on the end surface of the slider facing the guide rod; a second sliding hole is provided in the slider, and the second sliding hole is connected to the first sliding hole; and the second end of the guide rod passes through the first sliding hole and is arranged in the second sliding hole.

[0009] Furthermore, a limiting block is fixedly provided on the second end of the guide rod; the size of the limiting block matches the size of the second sliding hole, and the shape of the limiting block matches the shape of the second sliding hole; the size of the limiting block is larger than the size of the first sliding hole.

[0010] Furthermore, the flameproof switch cavity comprises: a first flameproof cavity and a second flameproof cavity; the first flameproof cavity is fixedly connected to the second flameproof cavity.

[0011] Furthermore, both the first flameproof cavity and the second flameproof cavity are provided with flameproof threads.

[0012] Furthermore, a cylindrical flameproof joint surface is formed at the contact point between the operating rod and the flameproof switch cavity.

[0013] Furthermore, the power-off switch also includes: a plurality of glue-sealed insulating sleeve structures; the plurality of glue-sealed insulating sleeve structures are fixedly arranged in the flameproof switch cavity; and the switch device is arranged between the glue-sealed insulating sleeve structure and the operating rod.

[0014] Furthermore, the glue-sealed insulating sleeve structure includes: a filling compound, a support plate, a conductor and two sleeves; the filling compound is fixedly arranged in the flameproof switch cavity; the support plate is fixedly arranged in the filling compound; the conductor is fixedly arranged on the support plate; the two sleeves are arranged in the filling compound, and both of the sleeves can contact the conductor.

[0015] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0016] Since the box body is fixedly arranged in the flameproof switch cavity, the flameproof switch cavity can protect the box body and realize flameproof protection for the box body at the same time. Since the operating rod passes through the flameproof switch cavity and the box body and is fixedly connected with the two moving contacts in sequence, and the partition is fixedly arranged in the box body, the partition separates the box body into a first chamber and a second chamber. Since two through holes are provided on the partition body, the fixed ends of the two slider assemblies are fixedly connected with the box body, and the action ends of the two slider assemblies can be slidably arranged on the partition body. The two slider assemblies correspond to the two through holes one by one, and the action ends of the slider assemblies can cover the corresponding through holes. The two static contacts are fixedly connected with the box body, and the two static contacts correspond to the two moving contacts one by one. The two through holes correspond to the two moving contacts one by one. The moving contacts can pass through the corresponding through holes to enter the second chamber, and the moving contacts contact the corresponding static contacts. Therefore, when power is to be turned on, the operating rod moves The direction of the partition moves, driving the moving contact to move in the first chamber, and the moving contact presses the slider assembly to make the slider assembly move away, exposing the through hole, and the moving contact passes through the corresponding through hole to enter the second chamber, and the moving contact contacts the corresponding static contact to achieve circuit conduction. When the circuit does not need to be conducted, the operating rod moves in the opposite direction of the partition, driving the moving contact to leave the static contact, and the moving contact passes through the corresponding through hole back to the first chamber. At this time, the slider assembly is no longer subjected to force, and slides to the through hole to block the through hole. In the open circuit state, increased safety protection is achieved. By superimposing flameproof protection and increased safety protection, the safety protection effect is good, ensuring safe power-off of the battery and ensuring safety in the state of gas outburst, so that the battery power supply used in Class I coal mines can work safely in Class I places, and can be disconnected reliably when it needs to be disconnected, and the protection level meets the requirements of on-site use, ensuring equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a power-off switch provided in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the switch device of the power-off switch;

[0019] Figure 3 for Figure 2 Schematic diagram of the structure of the slider assembly of the switch device. DETAILED DESCRIPTION

[0020] See also Figure 1-2 A power-off switch provided in an embodiment of the present invention includes: a flameproof switch cavity 1, an operating rod 2 and a switch device 3.

[0021] The switch device 3 includes: a box body 3-1, a partition 3-2, two moving contacts 3-3, two stationary contacts 3-4 and two slider assemblies 3-5.

[0022] The box body 3 - 1 is fixedly arranged in the flameproof switch cavity 1 .

[0023] The operating rod 2 passes through the flameproof switch cavity 1 and the box body 3 - 1 in sequence and is fixedly connected to the two moving contacts 3 - 3 .

[0024] The partition 3-2 is fixedly arranged in the box body 3-1, and two through holes are formed on the partition 3-2.

[0025] The fixed ends of the two slider assemblies 3-5 are fixedly connected to the box body 3-1, and the action ends of the two slider assemblies 3-5 can be slidably set on the partition 3-2. The two slider assemblies 3-5 correspond to the two through holes one by one, and the action ends of the slider assemblies 3-5 can cover the corresponding through holes.

[0026] The two static contacts 3-4 are fixedly connected to the box body 3-1, the two static contacts 3-4 correspond to the two dynamic contacts 3-3 one by one, the two through holes correspond to the two dynamic contacts 3-3 one by one, and the dynamic contacts 3-3 can pass through the corresponding through holes to contact the corresponding static contacts 3-4.

[0027] In the specific implementation of the present application, since the box 3-1 is fixedly arranged in the flameproof switch cavity 1, the flameproof switch cavity 1 can protect the box 3, and at the same time, the box 3-1 is flameproof protected. Since the operating rod 2 passes through the flameproof switch cavity 1 and the box 3-1 in sequence and is fixedly connected to the two moving contacts 3-3, and the partition 3-2 is fixedly arranged in the box 3-1, the partition 3-2 divides the box 3-1 into a first chamber and a second chamber. Since there are two through holes on the partition 3-2, the fixed ends of the two slider assemblies 3-5 Both are fixedly connected to the box body 3-1, the action ends of the two slider assemblies 3-5 can be slidably arranged on the partition 3-2, the two slider assemblies 3-5 correspond to the two through holes one by one, the action ends of the slider assemblies 3-5 can cover the corresponding through holes, the two static contacts 3-4 are fixedly connected to the box body 3-1, the two static contacts 3-4 correspond to the two moving contacts 3-3 one by one, the two through holes correspond to the two moving contacts 3-3 one by one, the moving contacts 3-3 can pass through the corresponding through holes and contact with the corresponding static contacts 3-4, so when it is necessary to When the power is on, the operating rod 2 moves in the direction of the partition 3-2, driving the moving contact 3-3 to move in the first chamber, and the moving contact 3-3 presses the slider assembly 3-5, so that the slider assembly 3-5 moves away, exposing the through hole, and the moving contact 3-3 passes through the corresponding through hole into the second chamber, and the moving contact 3-3 contacts the corresponding static contact 3-4 to achieve circuit conduction. When the circuit does not need to be conducted, the operating rod 2 moves in the direction away from the partition 3-2, driving the moving contact 3-3 to leave the static contact 3-4, and the moving contact 3-3 passes through the corresponding through hole. The hole returns to the first chamber. At this time, the slider assembly 3-5 is no longer stressed and slides to the through hole to cover the through hole. In the open circuit state, increased safety protection is achieved. By superimposing the flameproof protection and the increased safety protection, the safety protection effect is good and can reach the Ma protection level to ensure the safe power-off of the battery and the safety in the case of gas outburst. The battery power supply used in Class I coal mines can work safely in Class I places and can be reliably disconnected when it needs to be disconnected. The protection level meets the requirements for on-site use to ensure equipment safety.

[0028] A limit plate 2 - 1 is fixedly arranged on the end surface of the operating rod 2 facing away from the switch device 3 to prevent the operating rod 2 from falling into the flameproof switch cavity 1 .

[0029] In this embodiment, the first ends of the two static contacts 3-4 are both arranged in the box body 3-1, the first ends of the two static contacts 3-4 are both arranged with static contacts, the two dynamic contacts 3-3 are both arranged with dynamic contacts, and the dynamic contacts can contact with the corresponding static contacts. The second ends of the two static contacts 3-4 are both arranged outside the box body 3-1 for connection with the wire.

[0030] In this embodiment, the fixed ends of the two slider assemblies 3 - 5 are fixedly connected to the inner wall of the box body 3 - 1 .

[0031] See also Figure 3 Specifically, the slider assembly 3-5 includes: a slider 3-51, a guide rod 3-52 and an elastic member 3-53.

[0032] The first end of the guide rod 3-52 is fixedly connected to the box body 3-1.

[0033] The slider 3-51 can be slidably mounted on the second end of the guide rod 3-52.

[0034] The elastic member 3-53 is sleeved on the guide rod 3-52, and the elastic member 3-53 is arranged between the slider 3-51 and the inner wall of the box body 3-1. In this embodiment, the elastic member 3-53 can be a spring.

[0035] In the initial state, that is, when the circuit does not need to be energized, the moving contact 3-3 is in the first chamber and does not contact the corresponding static contact 3-4. At this time, the elastic member 3-53 is in an extended state, pushing the slider 3-51 to the through hole to block the through hole. When power is to be turned on, the operating rod 2 moves in the direction of the partition 3-2, driving the moving contact 3-3 to move in the first chamber. The moving contact 3-3 presses the slider 3-51, and the slider 3-51 slides on the guide rod 3-52, compressing the elastic member 3-53, so that the slider 3-51 moves away to expose the through hole. When the circuit does not need to be turned on, the operating rod 2 moves in the direction away from the partition 3-2, driving the moving contact 3-3 to leave the static Contact 3-4, the moving contact 3-3 passes through the corresponding through hole and returns to the first chamber. At this time, the slider 3-51 is no longer subjected to force. Under the restoring force of the elastic member 3-53, the slider 3-51 slides on the guide rod 3-52 until the slider 3-51 slides to the through hole, blocking the through hole. In the open circuit state, increased safety protection is achieved. By combining the flameproof protection with the increased safety protection, the Ma protection level can be achieved to ensure safe power-off of the battery and safety in the event of a gas outburst. The battery power supply used in Class I coal mines can work safely in Class I locations and can be reliably disconnected when needed, and the protection level meets the requirements for on-site use.

[0036] Specifically, a slope is provided on the end surface of the slider 3-51 away from the movable contact 3-3. When the movable contact 3-3 presses the slider 3-51, the movable contact 3-3 contacts the slope, so that the movable contact 3-3 can move along the slope, which facilitates the slider 3-51 to move on the guide rod 3-52.

[0037] A first sliding hole is provided on the end face of the slider 3-51 facing the guide rod 3-52, a second sliding hole is provided in the slider 3-51, the second sliding hole is connected to the first sliding hole, the second end of the guide rod 3-52 passes through the first sliding hole and is arranged in the second sliding hole, and the slider 3-51 slides on the guide rod 3-52 through the second sliding hole.

[0038] A limit block 3-54 is fixedly provided at the second end of the guide rod 3-52. The size of the limit block 3-54 matches the size of the second sliding hole, and the shape of the limit block matches the shape of the second sliding hole, ensuring that the slider 3-51 can slide smoothly on the guide rod 3-52.

[0039] The size of the limit block 3-54 is larger than the size of the first sliding hole to prevent the slider 3-51 from being separated from the guide rod 3-52.

[0040] In this embodiment, the material of the slider 3-51 is non-metal, specifically plastic.

[0041] Specifically, the flameproof switch cavity 1 includes: a first flameproof cavity 1 - 1 and a second flameproof cavity 1 - 2 .

[0042] The first flameproof cavity 1-1 is fixedly connected to the second flameproof cavity 1-2, and the flameproof switch cavity 1 is divided into two parts, which is convenient for factory testing.

[0043] Both the first flameproof cavity 1-1 and the second flameproof cavity 1-2 are provided with flameproof threads to ensure flameproof protection.

[0044] In this embodiment, a protrusion is provided on the first flameproof cavity 1-1 of the flameproof switch cavity 1, the shell 4 is sleeved on the protrusion, and the switch lock nut 5 is threadedly connected with the protrusion to realize a fixed connection between the first flameproof cavity 1-1 and the shell 4 to ensure a firm connection.

[0045] Specifically, the contact between the operating rod 2 and the flameproof switch cavity 1 forms a cylindrical flameproof joint surface, thereby ensuring flameproof protection.

[0046] Specifically, the power-off switch further includes: a plurality of glue-sealed insulating sleeve structures 6 .

[0047] A plurality of glue-sealed insulating sleeve structures 6 are fixedly arranged in the flameproof switch cavity 1 .

[0048] The switch device 3 is arranged between the glue-sealed insulating sleeve structure 6 and the operating rod 2 .

[0049] The glue-sealed insulating sleeve structure 6 includes: a filling compound 6-1, a support plate 6-2, a conductor 6-3 and two sleeves 6-4.

[0050] The filling compound 6-1 is filled in the flameproof switch cavity 1. In this embodiment, the material of the filling compound 6-1 is resin, specifically epoxy resin.

[0051] The support plate 6-2 is fixedly disposed in the filling compound 6-1. In this embodiment, the support plate 6-2 is perpendicular to the operating rod 2, and the support plate 6-2 is parallel to the partition plate 3-2.

[0052] The conductor 6-3 is fixedly arranged on the support plate 6-2, and the conductor 6-3 is supported by the support plate 6-2. In this embodiment, the material of the conductor 6-3 is metal, specifically copper.

[0053] Two sleeves 6-4 are arranged in the filling compound 6-1, and both sleeves can contact the conductor 6-3. In this embodiment, the two sleeves 6-4 include a first sleeve and a second sleeve, the first sleeve passes through the filling compound 6-1 to reach the static contact 3-4, which is convenient for the wire to pass through, and the second sleeve passes through the filling compound 6-1 and the second flameproof cavity 1-2 in sequence, which is convenient for the wire to pass through.

[0054] The conductor 6-3 is fixed on the support plate 6-2, and the two sleeves 6-4 are in contact with the conductor 6-3. The wire passes through the two sleeves 6-4 and is brazed with the conductor 6-3 to ensure reliable connection. Then the support plate 6-2 is installed in the second flameproof cavity 1-2 of the flameproof switch cavity 1, and then sealed by filling the composite material 6-1. This complies with the provisions of IEC60079-1 and GB3836.2, and is convenient for factory testing of components. At the same time, it ensures that the flameproof surface meets the requirements. For electrical cavities with a power of less than 250W and a current of less than 5A, direct introduction can be used.

[0055] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A power-off switch, characterized in that: The power-off switch comprises: a flameproof switch cavity, an operating rod and a switch device; The switch device comprises: a box body, a partition, two moving contacts, two stationary contacts and two slider assemblies; The box is fixedly arranged in the flameproof switch cavity; The operating rod passes through the flameproof switch cavity and the box in sequence, and is fixedly connected to the two moving contacts; The partition is fixedly arranged in the box body, and two through holes are provided on the partition; The fixed ends of the two slider assemblies are fixedly connected to the box body, the action ends of the two slider assemblies are slidably arranged on the partition, the two slider assemblies correspond to the two through holes one by one, and the action ends of the slider assemblies can cover the corresponding through holes; The two static contacts are both fixedly connected to the box body, the two static contacts correspond one-to-one to the two moving contacts, the two through holes correspond one-to-one to the two moving contacts, and the moving contacts can pass through the corresponding through holes to contact the corresponding static contacts.

2. The power disconnect switch according to claim 1, characterized in that: The slider assembly comprises: a slider, a guide rod and an elastic member; The first end of the guide rod is fixedly connected to the box body; The sliding block is slidably mounted on the second end of the guide rod; The elastic member is sleeved on the guide rod, and the elastic member is arranged between the sliding block and the inner wall of the box body.

3. The power cut-off switch according to claim 2, characterized in that: The end surface of the sliding block facing away from the moving contact piece is provided with a slope.

4. The power cut-off switch according to claim 2, characterized in that: A first sliding hole is formed on the end surface of the sliding block facing the guide rod; A second sliding hole is provided in the sliding block, and the second sliding hole is connected to the first sliding hole; The second end of the guide rod passes through the first sliding hole and is arranged in the second sliding hole.

5. The power cut-off switch according to claim 4, characterized in that: A limit block is fixedly disposed on the second end of the guide rod; The size of the limit block matches the size of the second sliding hole, and the shape of the limit block matches the shape of the second sliding hole; The size of the limiting block is larger than the size of the first sliding hole.

6. The power disconnect switch according to claim 1, characterized in that: The flameproof switch cavity comprises: a first flameproof cavity and a second flameproof cavity; The first flameproof cavity is fixedly connected to the second flameproof cavity.

7. The power cut-off switch according to claim 6, characterized in that: The first flameproof cavity and the second flameproof cavity are both provided with flameproof threads.

8. The power disconnect switch according to claim 1, characterized in that: The contact point between the operating rod and the flameproof switch cavity forms a cylindrical flameproof joint surface.

9. The power disconnect switch according to claim 1, characterized in that: The power-off switch also includes: a plurality of glue-sealed insulating sleeve structures; A plurality of the rubber-sealed insulating sleeve structures are fixedly arranged in the flameproof switch cavity; The switch device is arranged between the glue-sealed insulating sleeve structure and the operating rod.

10. The power disconnect switch according to claim 9, characterized in that: The glue-sealed insulating sleeve structure comprises: a filling compound, a support plate, a conductor and two sleeves; The filling compound is fixedly arranged in the flameproof switch cavity; The support plate is fixedly disposed in the filling compound; The conductor is fixedly arranged on the support plate; The two sleeves are arranged in the filling compound, and both of the two sleeves can be in contact with the conductor.

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