An interlocking structure for the cable chamber door of a ring main unit

Abstract

The present invention provides an interlocking structure for the cable chamber door of a ring main unit. The interlocking structure includes a first member, a second member, a third member, a fourth member, a fifth member, a sixth member, a first frame, a second frame, and a reset tension spring; the second member and the sixth member are fixed on the first frame, the third member and the fifth member are fixed on the second frame, the fourth member is clamped at one end of the third member, the first member is arranged on one side of the second member and can move left and right, one end of the reset spring is hooked on the third member, and the other end is hooked on the second frame; an inclined surface is provided at the top of the end of the second member extending out of the second frame, a clamping post is arranged on the third member, and the clamping post can slide on the inclined surface, a clamping groove is provided at the bottom of the end of the second member extending out of the second frame, and the other end of the fifth member can be clamped in the clamping groove during rotation. The interlocking structure of the present invention is small and reliable in structure, has high locking strength, and is convenient for installation, maintenance and replacement.

Description

Technical Field

[0001] The present invention relates to a ring main unit, and particularly to an interlocking structure for the cable chamber door of a ring main unit. Background Art

[0002] A ring main unit is a set of power transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into a prefabricated sectionalized ring main power supply unit. Its core part uses a load switch and a fuse, and has the advantages of simple structure, small volume, low price, improving power supply parameters and performance, and power supply safety. It is widely used in distribution substations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and industrial enterprises.

[0003] The "five-prevention interlock" of the ring main unit specifically means that the gas-insulated ring main unit should avoid disconnecting and closing the disconnector under load; avoid misoperation of disconnecting and closing the circuit breaker, high-voltage load switch, and AC contactor; avoid opening the circuit breaker and high-voltage load switch when the earthing switch is in the closed state; avoid misclosing the earthing switch during induced electrification; and avoid accidentally entering the induced electrification chamber. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an interlocking structure for the cable chamber door of a ring main unit.

[0005] An interlocking structure for the cable chamber door of a ring main unit provided by the present invention has the following technical solution:

[0006] It includes a first component, a second component, a third component, a fourth component, a fifth component, a sixth component, a first frame, a second frame, and a return spring;

[0007] The second component and the sixth component are fixed on the first frame, the third component and the fifth component are fixed on the second frame, the fourth component is clamped at one end of the third component, the first component is arranged on one side of the second component and can move left and right, one end of the return spring is hooked on the third component, and the other end is hooked on the connecting piece of the second frame;

[0008] The top of the end of the second component extending out of the second frame is provided with an inclined surface, and the third component is provided with a clamping post that can slide on the inclined surface; the bottom of the end of the second component extending out of the second frame is provided with a card slot, and the other end of the fifth component can be clamped in the card slot during rotation.

[0009] An interlocking structure for the cable chamber door of a ring main unit provided by the present invention further includes the following subsidiary technical solutions:

[0010] Wherein, when the first member moves above the second member, the second member can abut against the first member so that the second member cannot move upward; when the first member moves to one side of the second member, the second member is staggered from the first member and the second member can move upward.

[0011] Wherein, a convex edge is provided on the first member, and a retaining piece is provided on the second member. When the first member moves towards the second member, the retaining piece on the second member ensures that the first member moves above the second member.

[0012] An inclined groove is provided at the top of one end of the second member extending out of the second frame, and the clamping post can slide on the inclined surface of the inclined groove.

[0013] Wherein, a long strip-shaped through hole is provided on the second frame, and the second member extends out of the long strip-shaped through hole and can move up and down through the long strip-shaped through hole.

[0014] Wherein, connecting pieces are provided on the second frame in an up-and-down opposite manner. A first through hole is provided on the connecting piece, and a second through hole is provided on the fourth member. One end of the third member sequentially passes through the first through hole on the lower connecting piece of the second frame and the second through hole on the fourth member, and the other end passes through the first through hole on the lower connecting piece of the second frame and is fixed to the second frame. The third member can move along the direction of the through hole.

[0015] Wherein, the middle part of the fifth member is fixed to the second frame through a fastener, and the fifth member can rotate with the fastener as a fulcrum.

[0016] Wherein, a copper bushing is provided at the fixing position of the fifth member and the second frame.

[0017] Wherein, a clamping block is provided on the third member, and a clamping hole is provided on the lower connecting piece of the second frame. One end of the reset tension spring is hooked on the clamping block, and the other end is hooked in the clamping hole.

[0018] Wherein, the interlocking structure further includes an auxiliary tension spring. One end of the auxiliary tension spring is hooked on the connecting piece of the second frame, and the other end is hooked on the fifth member.

[0019] The implementation of the present invention includes the following technical effects:

[0020] An interlocking structure for a cable chamber door of a ring main unit provided by the present invention has the advantages of small and compact structure, reliability, high locking strength, and being convenient for installation, maintenance and replacement. Description of the Drawings

[0021] Figure 1The present invention is a structural schematic diagram of an interlocking structure for a cable room door of a ring main unit from one angle.

[0022] Figure 2 The present invention is a schematic structural diagram of an interlocking structure for a cable room door of a ring main unit from another angle.

[0023] Figure 3 The present invention is a partial structural schematic diagram of an interlocking structure for a cable room door of a ring main unit.

[0024] Figure 4 The present invention is a front view of an interlocking structure for a cable room door of a ring main unit.

[0025] In the figure, 1-first component, 2-second component, 3-third component, 4-fourth component, 5-fifth component, 6-sixth component, 7-first frame, 8-second frame, 9-reset spring, 10-fastener, 11-copper sleeve, 12-auxiliary spring, 101-convex edge, 21-inclined surface, 22-slot, 23-blocking plate, 31-clamping column, 32-clamping block, 41-second through hole, 81-long strip through hole, 82-connecting plate, 83-first through hole, 84-clamping hole. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with embodiments and drawings. It should be pointed out that the described embodiments are only intended to facilitate the understanding of the present invention and do not have any limiting effect on the present invention.

[0027] The directions described in this application, such as up, down, left, and right, are used for the convenience of describing with reference to the drawings and do not constitute a limitation on the scope of protection.

[0028] The interlocking structure for the cable room door of the ring main unit provided by the present invention is as follows: Figures 1-4 As shown, it includes a first component 1, a second component 2, a third component 3, a fourth component 4, a fifth component 5, a sixth component 6, a first frame 7, a second frame 8, and a reset spring 9;

[0029] The second member 2 and the sixth member 6 are fixed to the first frame 1, the third member 3 and the fifth member 5 are fixed to the second frame 2, the fourth member 4 is clamped to one end of the third member 3, the first member 1 is arranged on one side of the second member 2 and can move left and right, one end of the return spring 9 is hooked on the third member 3, and the other end is hooked on the second frame connecting piece 82;

[0030] One end of the second member 2 extending out of the top of the second frame 8 is provided with an inclined surface 21, and a clamping post 31 is arranged on the third member 3, and the clamping post 31 can slide on the inclined surface 21; one end of the second member 2 extending out of the bottom of the second frame 8 is provided with a clamping groove 22, and the other end of the fifth member 5 can be clamped in the clamping groove 22 during the rotation process. Among them, the fourth member 4 is the power distribution room door. An interlocking structure for the cable chamber door of a ring main unit provided by the present invention has the advantages of small and compact structure, reliability, high locking strength, and being convenient for installation, maintenance and replacement.

[0031] In one embodiment, as Figures 1-4 shown, when the first member 1 moves to the upper side of the second member 2 to the right, the second member 2 can abut against the first member 1, so that the second member 2 cannot move upward; when the first member 1 moves to one side of the second member 2 to the left, the second member 2 is offset from the first member 1, so that the second member 2 can move upward.

[0032] In one embodiment, as Figures 1-4 shown, a convex edge 101 can be arranged on the first member 1, and a stop piece 23 is arranged on the second member 2. When the first member 1 moves to the second member 2 to the right, the stop piece 23 on the second member 2 can ensure that the convex edge 101 of the first member 1 is above the stop piece 23 of the second member, so that the second member 2 cannot move upward.

[0033] In one embodiment, one end of the second member 2 extending out of the top of the second frame 8 is provided with an inclined groove, and the clamping post 31 can slide on the inclined surface 21 of the inclined groove.

[0034] In one embodiment, as Figure 1 shown, a long strip through hole 81 is arranged on the second frame 8, and the second member 2 extends out of the long strip through hole 81 and can move up and down through the long strip through hole 81.

[0035] In one embodiment, as Figures 2-3 shown, the second frame 8 is provided with upper and lower opposite connecting pieces 82, the connecting piece 82 is provided with a first through hole 83, the fourth member 4 is provided with a second through hole 41, one end of the third member 3 sequentially passes through the first through hole 83 on the lower connecting piece 82 of the second frame 8 and the second through hole 41 on the fourth member 4, and the other end is fixed to the second frame 8 after passing through the first through hole 83 on the lower connecting piece 82 of the second frame 8, and the third member can move along the through hole direction; that is, the third member 3 passes through two through holes at the same time.

[0036] It should be noted that the second component 2 only passes through the long through hole 81 on the second frame 8, and the guidance of the second component 2 is formed by the connection between the second component 2 and the first frame 7 and the second frame 8.

[0037] In one embodiment, as Figure 3 shown, the middle part of the fifth component 5 is fixed to the second frame 8 by a fastener 10, and the fifth component 5 can rotate with the fastener 10 as a fulcrum.

[0038] In one embodiment, as Figure 3 shown, a copper bushing 11 is provided at the fixed position of the fifth component 5 and the second frame 8.

[0039] It should be noted that there is also a copper bushing at the connection between the second component 2 and the third component 3 to reduce the frictional resistance.

[0040] In one embodiment, as Figure 3 shown, a clamping block 32 is provided on the third component 3, and a clamping hole 84 is provided on the lower connecting piece 82 of the second frame 8. One end of the return spring 9 is hooked on the clamping block 32, and the other end is hooked in the clamping hole 84.

[0041] Among them, the interlock structure further includes an auxiliary spring 12. One end of the auxiliary spring 12 is hooked on the second frame connecting piece 82, and the other end is hooked on the fifth component 5.

[0042] An interlock structure for the cable chamber door of a ring main unit provided by the present invention works as follows:

[0043] When the earthing switch is in the open position, the first member 1 moves to directly above the second member 2 to the right. The stop piece 23 on the second member 2 can abut against the convex edge 101 of the first member 1, so that the second member 2 cannot move upward. When the earthing switch is in the closed position, the first member 1 moves to one side of the second member 2 to the left. The second member 2 is staggered from the first member 1, and the second member 2 can move upward. When the second member 2 is lifted, the clamping post 31 of the third member 3 can slide along the inclined surface on the inclined groove of the second member 2, thereby driving the third member 3 to move backward. After moving in place, the clamping post 31 on the third member 3 can be clamped at the bottom of the inclined groove of the second member 2, so as to prevent the second member 2 from falling due to gravity. At the same time, after the second member 2 is lifted in place, it can block the sixth member 6, so that the sixth member 6 cannot slide to the left to shield the earthing switch operation hole, so that the earthing switch cannot be operated when it is in the closed position. When the third member 3 moves backward in place, the third member 3 no longer inserts into the second through hole 41 of the fourth member 4, and the fourth member 4 can move upward to lift the cable chamber door (the fourth member 4). When the fourth member 4 is lifted upward, the fourth member 4 no longer blocks the fifth member 5. The fifth member 5 rotates clockwise (viewed from top to bottom) under the action of the auxiliary tension spring 12. After the fifth member 5 rotates clockwise, it snaps into the card slot 22 of the second member 2, and the second member 2 is completely locked, so as to further prevent the second member 2 from moving downward. At this time, it is prohibited to operate the earthing switch to open. When installing the cable chamber door, the fourth member 4 presses the fifth member 5 to make the fifth member 5 rotate counterclockwise. The fifth member 5 moves out of the card slot 22 of the second member 2. The fourth member 4 moves downward. At this time, manually press down the second member 2, and one end of the third member 3 is reset and snapped into the second through hole 41 of the fourth member 4, so that the cable chamber door (the fourth member 4) cannot be lifted upward, and the second member 2 no longer blocks the sixth member 6. The sixth member 6 slides to the left to make way for the earthing switch operation hole, and the earthing switch is operated to open to complete the locking of the cable chamber door.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An interlocking structure for the cable chamber door of a ring main unit, characterized in that, It includes a first component, a second component, a third component, a fourth component, a fifth component, a sixth component, a first frame, a second frame, and a reset tension spring; The second component and the sixth component are fixed on the first frame, the third component and the fifth component are fixed on the second frame, the fourth component is clamped at one end of the third component, the first component is arranged on one side of the second component and can move left and right. When the first component moves above the second component, the second component can abut against the first component so that the second component cannot move upward; When the first component moves to one side of the second component, the second component is offset from the first component so that the second component can move upward. One end of the reset tension spring is hooked on the third component and the other end is hooked on the second frame; At the top of one end of the second component extending out of the second frame, there is an inclined surface. A clamping post is arranged on the third component, and the clamping post can slide on the inclined surface. A long strip-shaped through hole is arranged on the second frame. The second component extends out of the long strip-shaped through hole and can move up and down through the long strip-shaped through hole. During the process of lifting the second component, the clamping post of the third component slides along the inclined surface of the second component, thereby driving the third component to move backward. When the second component is lifted in place, it blocks the sixth component, so that the sixth component cannot slide to the left to shield the earthing switch operation hole; On the second frame, there are upper and lower opposite connecting pieces. A first through hole is arranged on the connecting piece, and a second through hole is arranged on the fourth component. One end of the third component sequentially passes through the first through hole on the lower connecting piece of the second frame and the second through hole on the fourth component, and the other end passes through the first through hole on the upper connecting piece of the second frame and is then fixed on the second frame. The third component can move along the direction of the through hole. When the third component moves backward in place, the third component no longer inserts into the second through hole of the fourth component, and the fourth component can move upward to lift the cable chamber door; The middle part of the fifth component is fixed on the second frame through a fastener, and the fifth component can rotate with the fastener as a fulcrum. At the bottom of one end of the second component extending out of the second frame, there is a clamping groove. The other end of the fifth component can be clamped in the clamping groove during the rotation process. The interlocking structure further includes an auxiliary tension spring. One end of the auxiliary tension spring is hooked on the second frame and the other end is hooked on the fifth component. After the fourth component is lifted upward, the fourth component no longer blocks the fifth component. The fifth component rotates clockwise under the action of the auxiliary tension spring and is clamped into the clamping groove of the second component, so that the second component is locked, thereby prohibiting the operation of the earthing switch for opening; 2. The interlocking structure for the cable chamber door of a ring main unit according to claim 1, characterized in that: A convex edge is arranged on the first component, and a stop piece is arranged on the second component. When the first component moves towards the second component, the stop piece on the second component ensures that the first component moves above the second component.

3. The interlocking structure for the cable chamber door of a ring main unit according to claim 1, wherein: An inclined groove is arranged at the top of one end of the second component extending out of the second frame, and the clamping post can slide on the inclined surface of the inclined groove.

4. A interlocking structure for the cable chamber door of a ring main unit, according to any one of claims 1-3, characterized in that: A copper bushing is arranged at the fixed position of the fifth component and the second frame.

5. A latching structure for the cable chamber door of a ring main unit, according to any one of claims 1 to 3, characterized in that: The third component is provided with a clamping block, the lower connecting piece of the second frame is provided with a clamping hole, one end of the return tension spring is hooked on the clamping block, and the other end is hooked in the clamping hole.

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