CN209929209U

CN209929209U - High-voltage switch with arc extinguishing function

Info

Publication number: CN209929209U
Application number: CN201920766108.XU
Authority: CN
Inventors: 王冠然
Original assignee: Nanjing Puri Electric Power Technology Co Ltd
Current assignee: Nanjing Puri Electric Power Technology Co Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-01-10
Anticipated expiration: 2029-05-24

Abstract

The utility model relates to a high-voltage switch with arc extinguishing function uses in circuit electronic component field, and its technical scheme main points are: the arc extinguishing chamber is internally provided with a partition board which divides the arc extinguishing chamber into a left half chamber and a right half chamber, the fixed contact is fixedly connected with the inner wall of the left half chamber, the partition board is provided with a through hole which is adaptive to the shape of the fixed contact, one end of the fixed contact penetrates through the through hole, an arc extinguishing grid is arranged inside a pipe orifice of the fixed contact extending into the right half chamber, the inner side surface of the right half chamber is provided with a guide hole, the inner wall of the guide hole is provided with a guide post, one end of the guide post, which is positioned in the arc extinguishing chamber, is fixedly connected with a push plate, one end of the push plate, which is far away from the guide post, is fixedly; the advantages are that: the arc extinguishing is carried out by adopting a composite means, and the arc of the high-voltage switch is quickly extinguished by using a means of lengthening the arc and cooling, so that the time required by arc extinguishing is reduced.

Description

High-voltage switch with arc extinguishing function

Technical Field

The utility model belongs to the technical field of the circuit electronic component technique and specifically relates to a high tension switchgear with arc extinguishing function is related to.

Background

The rated voltage of 3kV or above is mainly used for switching on and off the electric appliance of the conductive loop, because the electric arcs with the current of 1500V of 1500 plus 2000A can be generated at the switch when the high-voltage circuit is switched off, the electric arcs have the characteristics of strong conductivity, energy concentration, high heat and the like, the timely switching-off of the circuit is delayed, and the high heat generated by the electric arcs is easy to burn insulating materials and threaten the safety of working personnel.

The high-voltage switch usually adopts the arc extinguishing bars arc extinguishing among the prior art, and this kind of mode arc extinguishing ability is limited, is unfavorable for high-voltage switch's quick arc extinguishing, and the electric arc speed of extinguishing is slow not only can damage insulating material but also can cause the threat to staff's safety.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-voltage switch with arc extinguishing function, its advantage: the arc extinguishing is carried out by adopting a composite means, and the arc generated when the high-voltage switch is disconnected is quickly extinguished by means of lengthening the arc, cooling and arc extinguishing grids, so that the time required by arc extinguishing is reduced.

The above technical purpose of the present invention can be achieved by the following technical solutions: the arc extinguishing chamber is an insulating material box filled with transformer oil, a partition plate is arranged in the arc extinguishing chamber and divides the arc extinguishing chamber into a left half chamber and a right half chamber, the fixed contact is a hollow circular tube and is fixedly connected with the inner wall of the left half chamber, a through hole matched with the fixed contact in shape is formed in the partition plate, one end of the fixed contact penetrates through the through hole, and an arc extinguishing grid is arranged inside a pipe orifice of the fixed contact extending into the right half chamber;

the switch comprises a right half chamber, a fixed contact, a guide post, a push plate, a movable contact and a contact post, wherein the right half chamber is provided with a guide hole on the inner side surface opposite to the fixed contact, the guide post is placed on the inner wall of the guide hole, one end of the guide post extends out of an arc extinguish chamber, the guide post is positioned in the push plate made of an insulating material, one end of the push plate, far away from the guide post, is fixedly connected with the movable contact, the movable contact is cylindrical, one end, close to the fixed contact, of the movable contact is provided with the contact post matched with the pipe orifice of the fixed contact, when the high-voltage switch is closed, the contact post extends into the.

By adopting the technical scheme, as the arc extinguishing chamber is filled with the transformer oil, the transformer oil is vaporized by the high temperature of the electric arc when the electric arc is generated, the transformer oil absorbs a large amount of heat and cools the electric arc while vaporizing, and the main component in the oil gas is hydrogen which surrounds the electric arc in the form of bubbles in the oil. Hydrogen has a high thermal conductivity, which makes it easy for the heat of the arc to dissipate. In addition, due to the temperature difference, the bubbles move, further enhancing the cooling of the arc. The extinguishing speed of the electric arc is accelerated, and the time required by the electric arc to be extinguished is reduced, so that the safety of the equipment is improved.

The utility model discloses further set up to: the rotary limiting device is characterized in that a knob is rotatably connected to the end face, extending out of the arc extinguish chamber, of the guide column, the knob is cylindrical, a handle is arranged on the knob, two limiting blocks are symmetrically arranged on the side wall of the knob, two stopping blocks are symmetrically arranged at the orifice of the guide hole of the arc extinguish chamber, and limiting grooves for the limiting blocks to slide into when the knob rotates are formed in the stopping blocks.

Through adopting above-mentioned technical scheme, thereby the setting up of handle makes things convenient for the staff to drive the moving contact motion through promoting or extracting the guide post and close or the disconnection switch, thereby makes the axial displacement of dog slip limiting groove in restriction guide post through rotatory knob behind staff's closed circuit prevent because of the unexpected removal of locking contact and break off the circuit, has promoted the reliability of device.

The utility model discloses further set up to: be equipped with the oil pump on the explosion chamber lateral wall, half room on the left side is connected with out oil pipe, half room on the right side is connected with into oil pipe, go out oil pipe and advance oil pipe and keep away from the one end of explosion chamber and all be connected with the oil inlet and the oil-out of oil pump.

By adopting the technical scheme, the transformer oil in the arc extinguishing chamber circularly flows through the oil pump, after the oil pump is started, the transformer oil enters the oil inlet pipe from the oil outlet of the oil pump and flows into the right half chamber, then flows to the left half chamber through the inner cavity of the static contact, and is conveyed to the oil inlet of the oil pump from the oil outlet pipe and enters the oil pump to complete circulation.

The utility model discloses further set up to: a first sealing ring is arranged between the static contact and the through hole, and a second sealing ring is arranged between the guide post and the guide hole.

By adopting the technical scheme, the situation that the transformer oil enters the right half chamber from the contact gap between the partition plate and the static contact is reduced by the first sealing ring, the situation that the transformer oil leaks out of the arc extinguish chamber from the contact gap between the guide hole and the guide post is reduced by the second sealing ring, the sealing capability of the device is enhanced, and the reliability of the device is further improved.

The utility model discloses further set up to: the moving contact is characterized in that a stop convex ring is arranged on the side wall of the moving contact, a stop plate is arranged in the right half chamber, a functional hole is formed in the stop plate, the aperture of the functional hole is larger than the diameter of the moving contact, the moving contact penetrates through the functional hole, the stop convex ring is positioned on one side, close to the guide post, of the stop plate, a compression spring is sleeved on the moving contact and is fixedly connected with the stop convex ring, and one end, far away from the stop convex ring, of the compression spring is fixedly connected with the stop plate.

By adopting the technical scheme, when a circuit needs to be disconnected, a worker rotates the knob to enable the limiting block to slide out of the limiting groove, the compression spring pushes the stop convex ring to enable the movable contact to be quickly separated from the fixed contact and quickly increase the distance between the fixed contact and the movable contact, so that the generated electric arc is quickly elongated, the extinguishing of the electric arc is further accelerated, and the time for extinguishing the electric arc is further shortened.

The utility model discloses further set up to: the oil outlet pipe is connected with an oil storage tank, and a refrigerator is arranged in the oil storage tank.

By adopting the technical scheme, the oil storage tank with the refrigerating machine is arranged in the oil circuit circulation to reduce the temperature of the transformer oil, so that the transformer oil can absorb more heat when vaporized due to the high temperature of the electric arc, the temperature of the electric arc is rapidly reduced, the electric arc is extinguished, and the arc extinguishing capacity of the device is further improved.

The utility model discloses further set up to: the oil storage tank is provided with an oil filling port, and the outer wall of the oil filling port of the oil storage tank is in threaded connection with a sealing cover.

By adopting the technical scheme, the worker can open the sealing cover to supplement the transformer oil lost due to vaporization of the transformer oil during working into the oil tank under the condition that the switch is in an off state and the oil pump stops working, and the practicability and reliability of the device are improved.

The utility model discloses further set up to: the knob is equipped with the torsional spring with the guide post junction, when the torsional spring is in natural state, the stopper is located the spacing inslot.

Through adopting above-mentioned technical scheme, when the switch disconnection, if do not rotate the knob and directly promote the guide post then the dog can block the gos forward of stopper to prevent the guide post and promote moving contact and static contact, thereby reduced the unexpected closed possibility that causes the accident of switch and improved the security of equipment.

The utility model discloses further set up to: the telescopic handle is characterized by further comprising a telescopic rod, wherein a connecting block is arranged at one end of the telescopic rod, and a clamping groove matched with the shape of the handle is formed in one end, far away from the telescopic rod, of the connecting block.

Through adopting above-mentioned technical scheme, when needs disconnection switch, operating personnel establishes the connecting block on the handle through the draw-in groove cover and then rotates the telescopic link, thereby compression spring promotes the moving contact and promotes the guide post to pop out fast when spacing piece roll-off spacing groove on the knob, thereby the guide post makes the telescopic link shorten when promoting the telescopic link, the possibility that the guide post bruises staff's hand when popping out has been reduced, also reduced because of stopping of staff's hand slows down moving contact and static contact and keeps away from the speed and reduce the possibility of arc extinguishing performance, the security of equipment has been improved and the reliability of equipment work has been specially born.

To sum up, the utility model discloses a beneficial technological effect does:

1. the arc extinguishing chamber filled with transformer oil inside, the arc extinguishing grid in the static contact cavity and the mechanical arc extinguishing structure comprising the compression spring are arranged to work in a matched mode to extinguish electric arcs quickly, so that the insulation structure on the high-voltage switch is protected, and the safety of the device is improved;

2. the arc extinguishing capacity of the device is further enhanced by forming oil circulation through the oil storage tank and the oil pump of the refrigerator, and the performance of the device is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram for embodying the oil reservoir of the present embodiment.

Fig. 4 is a schematic structural diagram for embodying the knob and the connecting rod in the present embodiment.

Fig. 5 is a schematic structural diagram for embodying the link of the present embodiment.

In the figure, 1, an arc extinguishing chamber; 11. a partition plate; 111. a through hole; 112. a first sealing ring; 12. a left half chamber; 121. an oil outlet pipe; 13. a right half chamber; 131. an oil inlet pipe; 132. a stopper plate; 133. a functional hole; 134. a compression spring; 14. a guide hole; 141. a second sealing ring; 15. a stopper; 151. a limiting groove; 16. connecting a power post; 2. static contact; 21. an arc chute; 3. a moving contact; 31. a contact post; 32. a stop convex ring; 4. a guide post; 41. pushing the plate; 42. a knob; 421. a limiting block; 422. a torsion spring; 43. a handle; 5. an oil pump; 6. an oil storage tank; 61. a refrigerator; 62. an oil filling port; 63. a sealing cover; 7. a telescopic rod; 71. connecting blocks; 72. a clamping groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a high-voltage switch with an arc extinguishing function comprises an arc extinguishing chamber 1, a fixed contact 2 and a movable contact 3, wherein the arc extinguishing chamber 1 is a box body filled with transformer oil, a partition plate 11 for dividing the arc extinguishing chamber 1 into a left half chamber 12 and a right half chamber 13 is arranged in the arc extinguishing chamber 1, the fixed contact 2 is a hollow circular tube, the fixed contact 2 is fixedly connected with the box body of the left half chamber 12, a through hole 111 for extending one end of the fixed contact 2 is formed in the partition plate 11, and an arc extinguishing grid 21 is arranged inside a pipe orifice at one end of the fixed contact 2 extending out of the partition plate 11;

the part of the joint of the arc extinguishing bar 21 and the static contact 2 is made of insulating materials, a guide hole 14 is formed in the box wall of a right half chamber 13 opposite to the static contact 2, a guide post 4 capable of moving along the axis direction of the guide hole 14 is placed on the inner wall of the guide hole 14, one end of the guide post 4 extends out of the arc extinguishing chamber 1, one end of the guide post 4, which is positioned in the right half chamber 13, is fixedly connected with a push plate 41, one end, which is far away from the guide post 4, of the push plate 41 is fixedly connected with a movable contact 3, the movable contact 3 is cylindrical, one end, which is close to the static contact 2, of the movable contact 3 is provided with a contact post 31, the contact post 31 is cylindrical and is matched with the pipe orifice of the static contact 2, when the switch is closed, the contact post 31 on the movable contact 3 extends into the;

as shown in fig. 1, in an actual use process, when the switch needs to be closed, a worker pushes the guide post 4 to push the movable contact 3, when the contact post 31 on the movable contact 3 is inserted into the pipe orifice of the static contact 2, the switch is closed, when the switch needs to be opened, the worker pulls the guide post 4 to enable the contact post 31 to be away from the pipe orifice of the static contact 2, at this time, an electric arc is generated between the contact post 31 and the pipe wall of the static contact 2, high heat generated by the electric arc enables transformer oil to be vaporized, the transformer oil vaporizes to absorb a large amount of heat to reduce the temperature of the electric arc, so that the electric arc is favorably extinguished, and the main component in the oil. Hydrogen has a high thermal conductivity, which makes it easy for the heat of the arc to dissipate. In addition, due to the temperature difference, bubbles move, the cooling of the electric arc is further enhanced, the situation that the insulating material is burnt by the electric arc is reduced, the safety of the switch is improved, and the switch can adapt to the arc extinguishing work when the circuit is disconnected under the high-voltage environment.

As shown in fig. 3 and 4, a cylindrical knob 42 is rotatably connected to an end face of the guide shaft extending out of the arc extinguish chamber 1, a handle 43 is arranged on the knob 42, two limit blocks 421 are symmetrically arranged on a side wall of the knob 42 relative to an axis of the knob 42, two stop blocks 15 are symmetrically arranged on an outer wall of the arc extinguish chamber 1 at orifices of the guide hole 14 relative to the guide hole 14, a limit groove 151 for the limit blocks 421 to slide into is formed in each stop block 15, when the switch is in a connected state, a worker rotates the knob 42 to enable the limit blocks 421 to slide into the limit groove 151, and the limit groove 151 limits the movement of the limit blocks 421 in the axis direction of the guide column 4 so as to limit the axial movement of the guide column 4, thereby reducing the situation that the circuit is disconnected due to the accidental pulling.

As shown in fig. 1 and 3, an oil pump 5, an oil outlet pipe 121 and an oil inlet pipe 131 are disposed on the outer side wall of the arc extinguish chamber 1, the left half chamber 12 is communicated with an oil inlet of the oil pump 5 through the oil outlet pipe 121, the right half chamber 13 is communicated with an oil outlet of the oil pump 5 through the oil inlet pipe 131, when a switch needs to be turned off in an actual working process, a worker starts the oil pump 5 in advance for several seconds, rotates the knob 42 to slide the limit block 421 out of the limit groove, pulls out the guide post 4 to separate the moving contact 3 from the stationary contact 2, at this time, the contact post 31 leaves the inner cavity of the stationary contact 2, the oil pump 5 outputs transformer oil from the oil outlet of the transformer to enter the right half chamber 13 through the oil inlet pipe 131, then the transformer oil reaches the left half chamber 12 from the right half chamber 13 through the inner cavity of the stationary contact 2, finally reaches the, due to the flowing of the transformer oil, the electric arc is rapidly elongated and enters the joint of the cavity in the static contact 2 and the arc extinguishing grid 21, the extinguishing of the electric arc is accelerated, the arc extinguishing capability of the device is further improved, and the safety of the device is improved.

As shown in fig. 2, a first sealing ring 112 is arranged on a contact surface between the static contact 2 and the through hole 111, a second sealing ring 141 is arranged on a contact surface between the guide post 4 and the guide hole 14, and the first sealing ring 112 and the second sealing ring 141 both improve the sealing effect, reduce the leakage of transformer oil from a gap between the static contact 2 and the through hole 111 and a gap between the guide post 4 and the guide hole 14, and improve the reliability of the device.

As shown in fig. 1, a stop plate 132 is disposed in the right half chamber 13, the stop plate 132 is provided with a functional hole 133 having a diameter larger than the cross-sectional diameter of the movable contact 3, one end of the movable contact 3 passes through the functional hole 133, the movable contact 3 is provided with a stop collar 32 in a direction in which the stop plate 132 is close to the guide post 4, the movable contact 3 is sleeved with a compression spring 134 fixedly connected with the stop collar 32, one end of the compression spring 134 far from the stop collar 32 is fixedly connected with the stop plate 132, one end of the guide post 4 extends out of the arc extinguish chamber 1 when the compression spring 134 is in a natural state, when the switch needs to be turned off, a worker only needs to rotate the knob 42 to slide the positioning block out of the positioning groove, the compression spring 134 pushes the stop collar 32 to push the movable contact 3 to rapidly separate the contact post 31 on the movable contact 3 from the static contact 2, because the contact post 31, further enhancing the arc extinguishing capability of the device.

As shown in fig. 3, one end of the oil outlet pipe 121, which is far from the connection of the left half chamber 12, is connected with an oil storage tank 6, a refrigerator 61 is arranged in the oil storage tank 6, the oil storage tank 6 is connected with an oil inlet of the oil pump 5, the transformer oil sequentially flows through the oil storage tank 6, the oil pump 5, the oil inlet pipe 131, the right half chamber 13, the left half chamber 12 and the oil outlet pipe 121 and finally returns to the oil storage tank 6 to complete a complete cycle, the oil tank with the refrigerator 61 keeps the transformer oil at a lower temperature, so that the transformer oil can absorb more heat when vaporized due to the high temperature of the electric arc, thereby more efficiently reducing the temperature of the electric arc, improving the arc extinguishing capability of the device, and.

As shown in fig. 3, the oil filling port 62 is formed in the oil storage tank 6, the sealing cover 63 is in threaded connection with the outer wall of the oil storage tank 6 at the oil filling port 62, and the transformer oil is filled into the oil tank by workers to supplement the transformer oil lost due to vaporization of the transformer oil during operation, so that the practicability and reliability of the device are improved.

As shown in fig. 4, a torsion spring 422 is arranged at a connection position of the knob 42 and the guide post 4, when the switch is turned off and the torsion spring 422 is in a natural state, the stopper 15 blocks the limiting block 421 from advancing when the guide post 4 is pushed by an external force, so that the moving contact 3 is prevented from moving towards the direction of the static contact 2, and the condition that the switch is accidentally closed to cause danger to workers is reduced.

As shown in fig. 4 and 5, the arc extinguishing device further comprises an expansion link 7, a connecting block 71 is arranged at one end of the expansion link 7, a clamping groove 72 matched with the shape of the handle 43 is formed in one end, away from the expansion link 7, of the connecting block 71, in the actual operation process, when the switch needs to be turned off, a worker sleeves the connecting block 71 on the handle 43 through the clamping groove 72, the expansion link 7 is rotated to rotate the handle 43 to rotate the knob 42, when the limiting block 421 slides out of the limiting groove 151, the compression spring 134 pushes the moving contact 3 away from the static contact 2, the guide column 4 is popped out to shrink the expansion link 7, the possibility that the hand of the worker is hit when the guide column 4 is popped out is reduced, the possibility that the moving contact 3 and the static contact 2 are away from each other due to the blocking of the hand of the worker is reduced, the.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a high voltage switch with arc extinguishing function, includes explosion chamber (1), static contact (2) and moving contact (3), its characterized in that: the arc extinguish chamber (1) is an insulating material box filled with transformer oil, a partition plate (11) is arranged in the arc extinguish chamber (1), the arc extinguish chamber (1) is divided into a left half chamber (12) and a right half chamber (13) by the partition plate (11), the static contact (2) is a hollow circular tube, the static contact (2) is fixedly connected with the inner wall of the left half chamber (12), a through hole (111) which is matched with the static contact (2) in shape is formed in the partition plate (11), one end of the static contact (2) penetrates through the through hole (111), and an arc extinguish grid (21) is arranged inside a pipe orifice of the part, extending into the right half chamber (13), of the static contact (2);

a guide hole (14) is arranged on the inner side surface of the right half chamber (13) opposite to the static contact (2), a guide post (4) is arranged on the inner wall of the guide hole (14), one end of the guide post (4) extends out of the arc extinguish chamber (1), one end of the guide post (4) positioned in the arc extinguish chamber (1) is fixedly connected with a push plate (41) made of insulating materials, one end of the push plate (41) far away from the guide post (4) is fixedly connected with the moving contact (3), the moving contact (3) is cylindrical, one end of the moving contact (3) close to the static contact (2) is provided with a contact column (31) which is adaptive to the pipe orifice of the static contact (2), when the high-voltage switch is closed, the contact column (31) extends into the pipe orifice of the static contact (2) and is separated from the arc extinguishing grid (21), the static contact (2) and the moving contact (3) are respectively connected with different electric connecting columns (16) on the box wall of the arc extinguish chamber (1) through wires.

2. The high-voltage switch with arc extinguishing function according to claim 1, wherein: the utility model discloses a rotary arc extinguishing chamber, including guide post (4), knob (42) are connected with to the rotation on the one end terminal surface that stretches out explosion chamber (1), knob (42) are cylindrical, be equipped with handle (43) on knob (42), the symmetry is equipped with two stopper (421) on knob (42) lateral wall, explosion chamber (1) are located guiding hole (14) drill way department symmetry and are equipped with two dog (15), set up spacing groove (151) that supplies knob (42) rotation time stopper (421) to slide in on dog (15).

3. The high-voltage switch with arc extinguishing function according to claim 1, wherein: be equipped with oil pump (5) on explosion chamber (1) lateral wall, half room (12) in the left side are connected with out oil pipe (121), half room (13) in the right side are connected with into oil pipe (131), go out oil pipe (121) and advance oil pipe (131) and keep away from the one end of explosion chamber (1) and all be connected with the oil inlet and the oil-out of oil pump (5).

4. The high-voltage switch with an arc extinguishing function according to claim 3, characterized in that: and a first sealing ring (112) is arranged between the static contact (2) and the through hole (111), and a second sealing ring (141) is arranged between the guide post (4) and the guide hole (14).

5. The high-voltage switch with arc extinguishing function according to claim 4, wherein: be equipped with locking bulge loop (32) on moving contact (3) lateral wall, be equipped with in right half room (13) stop plate (132), functional hole (133) have been seted up on stop plate (132), functional hole (133) aperture is greater than moving contact (3) diameter, moving contact (3) pass functional hole (133), stop bulge loop (32) are located one side that stop plate (132) are close to guide post (4), the cover is equipped with compression spring (134) on moving contact (3), compression spring (134) and locking bulge loop (32) fixed connection, the one end and the stop plate (132) fixed connection that stop bulge loop (32) were kept away from in compression spring (134).

6. The high-voltage switch with arc extinguishing function according to claim 4, wherein: an oil storage tank (6) is connected to the oil outlet pipe (121), and a refrigerating machine (61) is arranged in the oil storage tank (6).

7. The high-voltage switch with arc extinguishing function according to claim 6, wherein: be equipped with oiling mouth (62) on oil storage tank (6), threaded connection has sealed lid (63) on the outer wall of oil storage tank (6) oiling mouth (62) department.

8. The high-voltage switch with arc extinguishing function according to claim 2, wherein: the knob (42) is equipped with torsional spring (422) with guide post (4) junction, when torsional spring (422) is in natural state, stopper (421) are located spacing groove (151) for guide post (4).

9. The high-voltage switch with arc extinguishing function according to claim 8, wherein: still include telescopic link (7), telescopic link (7) one end is equipped with connecting block (71), draw-in groove (72) that suit with handle (43) shape are seted up to the one end that telescopic link (7) were kept away from in connecting block (71).