Isolation device for partial power failure of MCC-PC section

Abstract

The invention relates to the technical field of electrical isolation, and discloses an MCC-PC section partial power failure isolation device, which comprises a handle rod, a first insulating sheath and a second insulating sheath, and is characterized in that the handle rod is fixedly connected with the first insulating sheath, and the first insulating sheath and the second insulating sheath are both provided with bus clamping grooves; one side of the first insulating sheath is hinged to one side of the second insulating sheath, and the first insulating sheath and the second insulating sheath can be buckled with each other to clamp a bus; a sliding block component is arranged on the handle rod and can slide in the length direction of the handle rod. A first connecting rod is arranged between the sliding block component and the second insulating sheath, and the sliding block component slides to pull the second insulating sheath to rotate along the hinge shaft; an elastic reset piece is further arranged on the handle rod and connected with the sliding block component. According to the isolation device, the isolation of the electrified bus is realized, so that the equipment maintenance is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage isolation, and in particular to an isolation device for partial power outage of an MCC-PC section. Background Art

[0002] The MCC-PC section has numerous switchgear, some of which are powered off while others remain. When inspecting the powered-off equipment, the remaining equipment and busbars pose a safety risk to maintenance personnel. Traditionally, maintenance requires shutting down the entire section, which can disrupt production continuity.

[0003] In order to isolate the power-off part from the non-power-off part, there are solutions in the prior art, such as a withdrawable circuit breaker, which has three position states, one of which is the isolation position for achieving physical isolation, but it cannot achieve physical segmented isolation of the busbar. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides an isolation device for partial power outage of an MCC-PC segment, which realizes the segmented isolation of the non-power-outage part of the busbar without affecting the connectivity of production.

[0005] The present invention is achieved through the following technical solutions: An isolation device for a partial power outage in an MCC-PC section includes a handle bar, a first insulating sheath, and a second insulating sheath. The handle bar is fixedly connected to the first insulating sheath. Both the first insulating sheath and the second insulating sheath are provided with a busbar clamping groove. One side of the first insulating sheath is hingedly connected to one side of the second insulating sheath. The first insulating sheath and the second insulating sheath can be mutually engaged to clamp the busbar. The handle bar is provided with a slider member, which can slide along the length direction of the handle bar; a first connecting rod is provided between the slider member and the second insulating sheath, and the second insulating sheath is pulled to rotate along the hinge axis by sliding the slider member; The handle rod is further provided with an elastic reset member, which is connected to the slider member and can move toward a position where the first insulating sheath and the second insulating sheath are engaged with each other.

[0006] Optionally, a traction component is further provided on the handle rod, and the traction component is connected to the slider component, and can pull the slider component to move through the traction component.

[0007] Optionally, an insulating guard plate is further provided on the handle rod, which is used to divide the handle rod into two parts. The first insulating sheath and the second insulating sheath are located on the handle rod on one side of the insulating guard plate, and the traction component is arranged on the handle rod on the other side of the insulating guard plate.

[0008] Optionally, a gap filling component is further included, and the gap filling component is provided in both the busbar clamping groove of the first insulating sheath and the busbar clamping groove of the second insulating sheath; The gap filling assembly includes a sac-shaped component arranged in the busbar clamping groove, the sac-shaped component is filled with an insulating ball component, and the sac-shaped component has a redundant length along the cross-sectional direction, and can fill the gap between the busbar and the insulating sheath when the first insulating sheath and the second insulating sheath clamp the busbar.

[0009] Optionally, a redundant length of the sac-shaped member in the first insulating sheath is greater than a redundant length of the sac-shaped member in the second insulating sheath.

[0010] Optionally, an insulating ball compensation mechanism is also provided on the handle rod, and the insulating ball compensation mechanism includes a first piston, a second piston, an opening and closing assembly, a drive assembly, and a compensation channel arranged in the handle rod and connected to a sac-shaped component in the first insulating sheath. The first piston and the second piston are respectively provided in the compensation channel, the second piston is connected to the drive assembly, and the opening and closing assembly is arranged in a supplementary channel between the first piston and the second piston.

[0011] Optionally, the opening and closing component adopts a ball valve.

[0012] Optionally, the drive assembly adopts a rack and pinion pair, the gear portion of the rack and pinion pair is connected to a rotating handwheel, and the rack portion of the rack and pinion pair is connected to the second piston through a second connecting rod.

[0013] Optionally, the traction component is a rope.

[0014] Optionally, the elastic reset member is a coil spring.

[0015] The technical solution of the present invention has at least the following beneficial effects: 1. The isolation device for partial power outage of the MCC-PC section of the present invention is provided with a first insulating sheath and a second insulating sheath that can be opened and closed. When closed, the busbar can be wrapped, thereby achieving segmented isolation of the busbar without power outage. When maintenance personnel maintain equipment in this section, they can form safe isolation protection.

[0016] 2. The isolation device for partial power outage of the MCC-PC section of the present invention can also fill the gap between the insulating sheath and the busbar through the gap filling component, thereby improving electrical safety; further, an insulating ball compensation mechanism is provided, which controls the compensation amount of the insulating balls, thereby maintaining tight filling during isolation, preventing lateral movement of the isolation device, and achieving axial positioning. When the compensation amount is reduced, the isolation device can be moved, facilitating its movement, avoiding repeated opening and closing of the insulating sheath, and reducing operational risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A side cross-sectional view of an isolation device for partial power outage of the MCC-PC section according to Example 1 of the present invention; Figure 2 This is a side view of the isolation device in use for partial power outage of the MCC-PC section according to Example 1 of the present invention; Figure 3 A side cross-sectional view of an isolation device for partial power outage of the MCC-PC section according to Example 2 of the present invention; Figure 4 A partial side cross-sectional view of an isolation device for partial power outage of the MCC-PC section according to Example 2 of the present invention; Figure 5 This is a side view of an isolation device for partial power outage of the MCC-PC section according to Example 2 of the present invention; Figure 6 This is a side view of the use status of the isolation device for partial power outage of the MCC-PC section of Example 2 of the present invention.

[0018] Reference numerals: 000-busbar, 110-first insulating sheath, 120-second insulating sheath, 101-busbar clamping groove, 200-handle rod, 210-compensation channel, 301-traction component, 302-slider component, 303-elastic reset component, 304-first connecting rod, 400-insulating guard plate, 510-cystic component, 520-insulating ball component, 610-first piston, 620-opening and closing assembly, 630-second piston, 640-second connecting rod, 650-gear rack pair, 660-rotating handwheel. DETAILED DESCRIPTION

[0019] Example 1 The isolation device for partial power outage of the MCC-PC section of the present invention is suitable for isolating the busbar of the MCC-PC section. PC and MCC represent the power center and motor control center respectively in the power system. The section transmits voltage through the busbar connection. The busbar shape is generally cylindrical or rectangular. When the equipment in the MCC-PC section is repaired, the normal operation of the equipment without power outage exists. However, when repairing the power-off equipment, there is an electrical safety problem due to its close proximity to the busbar. In order to achieve safe maintenance, the entire section needs to be shut down.

[0020] To address the aforementioned problem of isolating the non-outage section, the present invention provides an isolation device for a partial outage of the MCC-PC section, including a handlebar 200, a first insulating sheath 110, and a second insulating sheath 120. The handlebar 200 is fixedly connected to the first insulating sheath 110. Both the first insulating sheath 110 and the second insulating sheath 120 are provided with a busbar clamping groove 101. One side of the first insulating sheath 110 is hingedly connected to one side of the second insulating sheath 120. The first insulating sheath 110 and the second insulating sheath 120 can interlock to clamp the busbar 000. The handlebar 200, the first insulating sheath 110, and the second insulating sheath 120 are all made of insulating materials. The outer contours of the first insulating sheath 110 and the second insulating sheath 120 are not restricted. The inner busbar clamping groove 101 adopts an arc-shaped structure, which can clamp the cylindrical busbar 000, thereby forming insulation isolation. The handle bar 200 is arranged in a certain length, and the length is selected according to relevant electrical specifications to ensure that the operator can maintain a certain distance from the busbar 000 when holding it.

[0021] The handle bar 200 is provided with a slider member 302, which can slide along the length direction of the handle bar 200. A sliding groove, such as a T-shaped groove, can be provided on the handle bar 200, so that the slider member 302 can be embedded in the T-shaped groove and can slide along the T-shaped groove. A first connecting rod 304 is provided between the slider member 302 and the second insulating sheath 120. The slider member 302 slides to pull the second insulating sheath 120 to rotate along the hinge axis. One end of the first connecting rod 304 is hingedly connected to the slider, and the other end is hingedly connected to the second insulating sheath 120. The hinge connection point can be arranged by an extension structure on the second insulating sheath 120 to prevent the hinge point from exceeding the rotation stop point and causing self-locking.

[0022] The handle bar 200 is also provided with an elastic reset member 303. The elastic reset member 303 is a coil spring. The elastic reset member 303 is connected to the slider member 302 and can provide a force to move the slider member 302 toward the position where the first insulating sheath 110 and the second insulating sheath 120 interlock. The elastic reset member 303 constantly pulls the slider member 302, and the force is transmitted through the slider member 302 to keep the second insulating sheath 120 and the first insulating sheath 110 in a closed state. When the first insulating sheath 110 and the second insulating sheath 120 need to be opened, an external force is applied to move the slider member 302. The slider member 302 overcomes the elastic force of the elastic reset member 303 and drives the second insulating sheath 120 to rotate about the hinge axis through the first connecting rod 304, thereby achieving opening.

[0023] To facilitate operator movement of the slider member 302, a traction member 301 is provided on the handle bar 200. The traction member 301 is a rope. The traction member 301 is connected to the slider member 302 and can be used to pull the slider member 302 to move. The traction member 301 extends from the end of the handle bar 200, allowing the operator to pull the traction member 301 to drive the slider member 302 to move. This makes operation more convenient and allows the slider member to be further away from the busbar end, ensuring safety.

[0024] The handle bar 200 is also provided with an insulating shield 400, which is used to divide the handle bar 200 into two parts. The first insulating sheath 110 and the second insulating sheath 120 are located on one side of the handle bar 200, and the traction member 301 is arranged on the handle bar 200 on the other side of the insulating shield 400. The insulating shield 400 ensures that the operator can only operate the traction member 301 when operating the slider member 302, and cannot directly operate the insulating sheath, thereby effectively preventing the operator from using the isolation device in an unauthorized manner.

[0025] When the isolation tool of the present invention is used, the operator can hold the handle bar 200, and then move the slider member 302 by pulling the traction component 301. The movement of the slider member 302 drives the second insulating sheath 120 to rotate around the rotation axis through the first connecting rod 304, thereby opening the busbar clamping groove 101. The operator can place the insulating sheath to a position where it can clamp the live busbar 000, and then release the traction component 301. Under the action of the elastic reset member 303, the slider member 302 is driven to move in the opposite direction, thereby pushing the second insulating sheath 120 to rotate in the opposite direction around the rotation axis, and then closing the busbar clamping groove 101 and closing it with the first insulating sheath 110, forming a stable clamping effect on the live busbar 000. During the clamping process, the elastic reset member 303 is relied on to maintain the clamping effect of the first insulating sheath 110 and the second insulating sheath 120, and they will not fall off, maintaining safety. In the entire isolation device, only the elastic reset member 303 is made of metal material, but it is placed in the middle of the handle rod 200 in an embedded structure and is not exposed. Other structures are all made of insulating materials. Therefore, the operation of the entire isolation device is safe and reliable.

[0026] Example 2 Since the shape of the busbar varies with different segments and voltages, it is necessary to provide isolation devices of various specifications to meet the actual needs in order to adapt to busbars of all shapes. To solve this problem, this embodiment makes the following improvements based on the first embodiment: This embodiment also includes a gap filling component, and a gap filling component is provided in the busbar clamping groove 101 of the first insulating sheath 110 and the busbar clamping groove 101 of the second insulating sheath 120. The gap filling component includes a sac-shaped component 510 provided in the busbar clamping groove 101, and the sac-shaped component 510 is filled with an insulating ball component 520. The sac-shaped component 510 has a redundant length along the cross-sectional direction, and can fill the gap between the busbar 000 and the insulating sheath when the first insulating sheath 110 and the second insulating sheath 120 clamp the busbar 000. The redundant length in the cross-sectional direction mentioned in this embodiment is that the sac-shaped component 510 has a compressible expansion space. For example, when the busbar 000 is pressed against the sac-shaped component 510, when squeezed, the sac-shaped component 510 will squeeze to the surroundings and automatically fill the gap. By providing a larger insulating sheath, the insulating sheath can cover a wider range of busbar sizes. Small busbars can also be filled with the bladder member 510, avoiding gaps that could cause looseness and friction, leading to electrical problems. The insulating ball member 520 filled in the middle of the bladder member 510 also serves as insulation.

[0027] Since the first insulating sheath 110 is at the bottom and the second insulating sheath 120 is at the top, the second insulating sheath 120 needs to be flipped over. Therefore, the redundant length of the sac-shaped member 510 in the first insulating sheath 110 is greater than the redundant length of the sac-shaped member 510 in the second insulating sheath 120, which can ensure that the filling amount of the second insulating sheath 120 at the top is not large, so that the buckling of the sheath will not be affected during the flipping process.

[0028] Furthermore, to more accurately control the compensation amount of the bladder member 510 in the first insulating sheath 110 and thus accommodate a wider range of busbar sizes, the handlebar 200 of this embodiment is also provided with an insulating ball compensation mechanism. The insulating ball compensation mechanism includes a first piston 610, a second piston 630, an opening and closing assembly 620, a drive assembly, and a compensation channel 210 provided in the handlebar 200 and communicating with the bladder member 510 in the first insulating sheath 110. The first piston 610 and the second piston 630 are respectively provided in the compensation channel 210, and the second piston 630 is connected to the drive assembly. The opening and closing assembly 620 is arranged in the supplementary channel between the first piston 610 and the second piston 630. The opening and closing assembly 620 utilizes a ball valve. The drive assembly utilizes a rack and pinion pair 650. The gear portion of the rack and pinion pair 650 is connected to a rotating handwheel 660, and the rack portion of the rack and pinion pair 650 is connected to the second piston 630 via a second connecting rod 640.

[0029] After the first insulating sheath 110 and the second insulating sheath 120 embrace the busbar, the handwheel 660 can be rotated to drive the gear rack pair 650, thereby driving the second piston 630 assembly. The second piston 630 assembly can squeeze the air between the first piston 610 and the second piston 630, thereby squeezing the first piston 610, and then squeezing the insulating ball member 520 through the first piston 610, pressing the insulating ball member 520 in the compensation channel 210 into the sac-shaped member 510 of the first insulating sheath 110, thereby compensating the gap. When the gap is filled, further rotation of the handwheel 660 will make it difficult to rotate. At this time, the ball valve can be closed, and the compensation channel 210 can be kept stationary. This can maintain the gap compensation. Due to the existence of friction, the isolation device can also be kept in a fixed position on the busbar section, avoiding the busbar size being too small and the gap being too large, which may cause the isolation device to move along the busbar, resulting in an unsafe isolation state.

[0030] When the equipment maintenance of a certain section is completed and the isolation device needs to be moved, the ball valve can be loosened to create a gap between the insulating sheath and the busbar, so that the entire isolation device can be easily moved. Moreover, this movement does not require the removal of the isolation device, so it is safer. After moving into place, compensation and fixation can be performed. Therefore, the insulating ball compensation mechanism plays the role of insulation compensation, and also plays the role of positioning the isolation device in the length direction of the busbar.

Claims

1. An isolation device for partial power outage of an MCC-PC section, characterized in that: The utility model comprises a handle rod, a first insulating sheath and a second insulating sheath, wherein the handle rod is fixedly connected to the first insulating sheath, the first insulating sheath and the second insulating sheath are both provided with a busbar clamping groove, and one side of the first insulating sheath is hingedly connected to one side of the second insulating sheath, and the first insulating sheath and the second insulating sheath can be buckled with each other to clamp the busbar; The handle bar is provided with a slider member, which can slide along the length direction of the handle bar; a first connecting rod is provided between the slider member and the second insulating sheath, and the second insulating sheath is pulled to rotate along the hinge axis by sliding the slider member; The handle rod is further provided with an elastic reset member, which is connected to the slider member and can move toward a position where the first insulating sheath and the second insulating sheath are engaged with each other.

2. The isolation device for partial power outage of the MCC-PC section according to claim 1 is characterized in that: The handle rod is further provided with a traction component, which is connected to the slider component and can pull the slider component to move through the traction component.

3. The isolation device for partial power outage of the MCC-PC section according to claim 2, characterized in that: The handle rod is also provided with an insulating guard plate, which is used to divide the handle rod into two parts. The first insulating sheath and the second insulating sheath are located on the handle rod on one side of the insulating guard plate, and the traction component is arranged on the handle rod on the other side of the insulating guard plate.

4. The isolation device for partial power outage of the MCC-PC section according to any one of claims 1 to 3, characterized in that: Also included is a gap filling assembly, wherein the busbar clamping groove of the first insulating sheath and the busbar clamping groove of the second insulating sheath are both provided with the gap filling assembly; The gap filling assembly includes a sac-shaped component arranged in the busbar clamping groove, the sac-shaped component is filled with an insulating ball component, and the sac-shaped component has a redundant length along the cross-sectional direction, and can fill the gap between the busbar and the insulating sheath when the first insulating sheath and the second insulating sheath clamp the busbar.

5. The isolation device for partial power outage of the MCC-PC section according to claim 4, characterized in that: The redundant length of the bladder member in the first insulating sheath is greater than the redundant length of the bladder member in the second insulating sheath.

6. The isolation device for partial power outage of the MCC-PC section according to claim 5, characterized in that: An insulating ball compensation mechanism is also provided on the handle rod, and the insulating ball compensation mechanism includes a first piston, a second piston, an opening and closing assembly, a drive assembly, and a compensation channel connected to a sac-shaped component in the handle rod and the first insulating sheath. The first piston and the second piston are respectively provided in the compensation channel, the second piston is connected to the drive assembly, and the opening and closing assembly is arranged in a supplementary channel between the first piston and the second piston.

7. The isolation device for partial power outage of the MCC-PC section according to claim 6, characterized in that: The opening and closing component adopts a ball valve.

8. The isolation device for partial power outage of the MCC-PC section according to claim 6, characterized in that: The driving assembly adopts a gear rack pair, the gear portion of the gear rack pair is connected to a rotating hand wheel, and the rack portion of the gear rack pair is connected to the second piston through a second connecting rod.

9. The isolation device for partial power outage of the MCC-PC section according to claim 2, characterized in that: The traction component is a rope.

10. The isolation device for partial power outage of the MCC-PC section according to claim 1, characterized in that: The elastic reset member is a coil spring.

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