Electrified short-circuit device for tubular bus of 35kV and above

Abstract

The invention provides a live-line short-circuit device for tubular buses of 35 kV and above, and relates to the technical field of live-line short-circuit of buses. The device comprises an upper shunting conductive arm and a lower shunting conductive arm, the end part of the upper shunting conductive arm is fixedly connected with a fixed arm, sliding grooves are formed in the upper surface and the lower surface of the fixed arm, first sliding holes are formed in the sliding grooves, side grooves are formed in the side surfaces of the fixed arm, and the side grooves are in through connection with the first sliding holes; two end plates are fixedly mounted at the end of the lower shunting conductive arm and are slidably mounted on the surfaces of the two sliding grooves respectively, second sliding holes are formed in the surfaces of the two end plates, adjusting columns slidably connected penetrate through the middles of the first sliding holes and the middles of the second sliding holes, connecting blocks are fixedly mounted on the side faces of the adjusting columns, and the connecting blocks are slidably connected with the side grooves; the side face of the connecting block is fixedly connected with a threaded column, and the threaded column is sleeved with a first nut in threaded connection. The problem that an existing live short circuit device can only carry out live short circuit on a flexible bus and cannot be processed when tubular buses are connected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of live short - circuit connection of busbars, and more specifically, to a live short - circuit connection device for tubular busbars of 35 kV and above. Background Art

[0002] In recent years, the main function of the disconnecting switch is the first disconnecting switch that separates the power supply line from the user. During maintenance operations, it separates the equipment to be maintained from the line disconnection point, thus ensuring the personal safety of maintenance personnel. The disconnecting switch is a very frequently used switchgear in the State Grid. However, since the contact contacts are exposed to the external environment for a long time, changes in natural conditions such as dust, rain, snow, and temperature will directly affect the power line. As the exposure time in the air increases, factors such as corrosion and oxidation will cause a series of problems such as wear and oxidation of the contact surface coating of the contact head. Under the action of the thermal effect of the current, the local resistance of the equipment increases, resulting in equipment overheating and power outages and other accidents. For substations of 35 kV and above, especially high - voltage substations, most connections use tubular busbars. The connection parts between the tubular busbars and the connecting fittings are severely oxidized due to temperature changes, ice, snow, and rain and dust. During the peak summer period, the load increases, and heating defects are relatively common. In 2019 alone, due to severe overheating, the busbars of Huiyuan, Honggou, and Dongkeng substations were forced to shut down 4 times, resulting in large - area power outages, seriously affecting agricultural irrigation and industrial electricity demand during the peak summer period and causing many user complaints. Therefore, how to effectively reduce the number of unplanned power outages caused by such accidents is an urgent problem to be solved at present. For the above reasons, there must be a new type of short - circuit connection device, a tool for bypassing the load and dealing with the overheating of the tubular busbar without power outage. If abnormal overheating occurs at the connection between the tubular busbar and the disconnecting switch, a short - circuit operation can be carried out at the connection to achieve temporary current transfer, and then the power line can be disconnected for live operation, so as to solve the problem of overheating of the busbar fittings under high temperature and high load conditions caused by the increase in the loop resistance of the contact surface.

[0003] The existing live short - circuit connection devices have a simple structure and can only be used for live short - circuit connection of flexible busbars. Therefore, it is urgent to design a device that can be used for live short - circuit connection of tubular busbars. Summary of the Invention

[0004] The problem solved by the present invention is that the existing live short - circuit connection devices can only perform live short - circuit connection of flexible busbars and cannot handle the connection of tubular busbars.

[0005] To solve the above problems, the present invention provides a live short-circuiting device for tubular busbars of 35 kV and above. The device includes an upper shunt conductive arm and a lower shunt conductive arm. A fixed arm is fixedly connected to the end of the upper shunt conductive arm. Chutes are provided on both the upper surface and the lower surface of the fixed arm. A first sliding hole is provided in the chute, and a side groove is provided on the side surface of the fixed arm. The side groove is connected to the first sliding hole in a penetrating manner;

[0006] Two end plates are fixedly installed at the end of the lower shunt conductive arm. The two end plates are respectively slidably installed on the surfaces of the two chutes. Second sliding holes are provided on the surfaces of the two end plates. An adjusting column is slidably connected through the middle parts of the first sliding hole and the second sliding hole. A connecting block is fixedly installed on the side surface of the adjusting column. The connecting block is slidably connected to the side groove. A threaded column is fixedly connected to the side surface of the connecting block. A first nut is sleeved on the threaded column and is threadedly connected thereto;

[0007] A base is fixedly installed at the bottom of the fixed arm. Two penetrating third sliding holes are provided at the end of the base. Two fixing blocks are fixedly installed at the bottom of the lower shunt conductive arm. First rods are fixedly connected to the bottoms of the two fixing blocks. The two first rods respectively pass through the two third sliding holes. First springs are sleeved on the first rods. The ends of the first springs are fixedly connected to the fixing blocks. A sliding sleeve is slidably connected to the first rod below the first spring. The sliding sleeve can pass through the third sliding hole. A first thread is provided on the lower surface of the lower end of the first rod. A second nut is installed on the first rod below the sliding sleeve and is threadedly connected to the first thread.

[0008] Preferably, limiting blocks are fixedly connected to both ends of the adjusting column. The two limiting blocks are respectively attached to the surfaces of the two end plates, and relative sliding is possible between the limiting blocks and the end plates.

[0009] Preferably, an upper clamping groove is provided on the bottom surface of the upper shunt conductive arm. A plurality of upper protrusions are provided in the upper clamping groove. A lower clamping groove is provided on the top surface of the lower shunt conductive arm. A plurality of lower protrusions are provided in the lower clamping groove.

[0010] Preferably, an installation groove is provided at the bottom of the base. An installation block is slidably connected in the installation groove. A support rod is fixedly connected to the bottom of the installation block.

[0011] Preferably, a second adjustment groove is formed inside the mounting block, a first adjustment groove communicating with the second adjustment groove is formed at the top of the support rod, a fourth sliding hole is formed in the middle of the support rod below the first adjustment groove, a rotating rod connected in a sliding manner is installed in the fourth sliding hole, a top column is fixedly connected to the end of the rotating rod, the top column can slide in the first adjustment groove and the second adjustment groove, the lower half section of the top column is cylindrical, the lower half section of the top column is frustum-shaped, two wall grooves are formed in the side wall of the second adjustment groove, spring grooves are formed in the groove walls of the wall grooves, second fixing holes are formed in the groove walls of the spring grooves, fixing rods are slidably installed in the second fixing holes, end blocks are fixedly installed at the ends of the fixing rods, the end blocks are slidably connected with the wall grooves, second springs are sleeved on the fixing rods, one end of each second spring is fixedly connected to the groove wall of the spring groove, and the other end of each second spring is fixedly installed on the surface of the end block; two through first fixing holes are formed in the inner wall of the installation groove, and the second fixing holes and the first fixing holes have the same aperture.

[0012] Preferably, a second thread is formed on the surface of the rotating rod, a third thread is formed in the fourth sliding hole, and the rotating rod and the support rod are threadedly connected through the cooperation of the second thread and the third thread.

[0013] Preferably, an anti-fooling strip is fixedly installed on the surface of the mounting block, and an anti-fooling groove adapted to the anti-fooling strip is formed in the installation groove.

[0014] Beneficial effects:

[0015] The invention provides a live short-circuiting device for tubular busbars of 35 kV and above, which has strong practicability. The adjustable type of the short-circuiting device is realized through the cooperation of the upper shunt conducting arm, the lower shunt conducting arm, the fixed arm and the first rod, and it can be effectively applied to busbars with different pipe diameters.

[0016] The invention realizes the detachable connection between the support rod and the base through the cooperation of the support rod and the rotating rod. When in use, workers can separate the support rod from the base on the ground, improving the safety and reliability of the work. Brief description of the drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the live short-circuiting device for tubular busbars of 35 kV and above in an embodiment of the invention;

[0018] Figure 2 It is a schematic diagram of the sectional structure of the live short-circuiting device for tubular busbars in an embodiment of the invention;

[0019] Figure 3 It is a schematic diagram of the structure of the fixed arm in an embodiment of the invention;

[0020] Figure 4 It is an exploded view of the lower shunt conducting arm and the adjusting column in an embodiment of the invention;

[0021] Figure 5 Structural diagram of the connection between the first rod structure and the sliding sleeve in the embodiment of the present invention;

[0022] Figure 6 Structural diagram of the first thread in the embodiment of the present invention;

[0023] Figure 7 Structural diagram of the support rod in the embodiment of the present invention;

[0024] Figure 8 Structural diagram of the rotating rod in the embodiment of the present invention;

[0025] Figure 9 Structural diagram of the end block in the embodiment of the present invention;

[0026] Figure 10 Structural sectional view of the support rod in the embodiment of the present invention;

[0027] Figure 11 For the present invention Figure 10 Enlarged structural diagram at position A.

[0028] Explanation of reference numerals:

[0029] 100, upper shunt conductive arm; 101, upper clamping groove; 102, upper protrusion;

[0030] 200, fixed arm; 201, first sliding hole; 202, side groove; 203, sliding groove;

[0031] 300, lower shunt conductive arm; 301, lower clamping groove; 302, lower protrusion; 310, end plate; 311, second sliding hole;

[0032] 400, adjusting column; 410, connecting block; 420, threaded column; 430, first nut; 440, limiting block;

[0033] 500, fixed block; 510, first rod; 511, first thread; 520, first spring; 530, sliding sleeve; 540, second nut;

[0034] 600, base; 601, third sliding hole; 602, installation groove; 603, first fixing hole;

[0035] 700, rotating rod; 701, second thread; 710, top column;

[0036] 800, support rod; 801, fourth sliding hole; 802, first adjustment groove; 803, third thread; 810, installation block; 811, second adjustment groove; 812, second fixing hole; 813, spring groove; 814, wall groove; 820, fixing rod; 830, end block; 840, second spring; 850, anti-fooling strip. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following is a brief description of the present invention in conjunction with the attached drawings. Figures 1-11 The specific embodiments of the present invention are described in detail.

[0038] See also Figures 1-6 The present invention provides a 35kV and above tubular busbar live short-circuit device, the device comprises an upper shunt conductive arm 100 and a lower shunt conductive arm 300, the end of the upper shunt conductive arm 100 is fixedly connected with a fixed arm 200, the upper surface and the lower surface of the fixed arm 200 are both provided with a slide groove 203, the slide groove 203 is provided with a first slide hole 201, the side of the fixed arm 200 is provided with a side groove 202, and the side groove 202 is connected with the first slide hole 201;

[0039] Two end plates 310 are fixedly installed at the end of the lower shunt conductive arm 300. The two end plates 310 are slidably installed on the surfaces of the two slide grooves 203 respectively. The surfaces of the two end plates 310 are both provided with second slide holes 311. The middle of the first slide hole 201 and the second slide hole 311 passes through the adjusting column 400 which is slidably connected. A connecting block 410 is fixedly installed on the side of the adjusting column 400. The connecting block 410 is slidably connected to the side groove 202. A threaded column 420 is fixedly connected to the side of the connecting block 410. A first nut 430 which is threadedly connected is sleeved on the threaded column 420.

[0040] A base 600 is fixedly installed at the bottom of the fixed arm 200, and two third sliding holes 601 are provided at the end of the base 600. Two fixed blocks 500 are fixedly installed at the bottom of the lower shunt conductive arm 300. The bottom of the fixed blocks 500 are fixedly connected with first rods 510, and the two first rods 510 pass through the two third sliding holes 601 respectively. The first rods 510 are sleeved with first springs 520, and the ends of the first springs 520 are fixedly connected to the fixed blocks 500. The first rods 510 located below the first springs 520 are sleeved with sliding sleeves 530 that are slidably connected, and the sliding sleeves 530 can pass through the third sliding holes 601. A first thread 511 is provided on the lower end surface of the first rod 510, and a second nut 540 threadedly connected to the first thread 511 is installed on the first rod 510 located below the sliding sleeve 530.

[0041] The device has a stable structure and can maintain the clamping force of the conductive part for a long time, thereby improving the conductive capacity and preventing heat generation.

[0042] See also Figure 4 In order to improve the stability of the adjustment column 400 when sliding, as a further solution of the embodiment of the present invention, both ends of the adjustment column 400 are fixedly connected to the limit blocks 440, and the two limit blocks 440 are respectively attached to the surfaces of the two end plates 310, and the limit blocks 440 and the end plates 310 can slide relative to each other.

[0043] Please refer to Figure 4 Figure 4 , in order to improve the stability of the upper shunt conducting arm 100 and the lower shunt conducting arm 300 when clamping the pipe busbar and avoid sliding, as a further solution of the embodiment of the present invention, an upper clamping groove 101 is provided on the bottom surface of the upper shunt conducting arm 100, and a plurality of upper protrusions 102 are arranged in the upper clamping groove 101. A lower clamping groove 301 is provided on the top surface of the lower shunt conducting arm 300, and a plurality of lower protrusions 302 are arranged in the lower clamping groove 301.

[0044] Please refer to Figure 2 Figure 2 , in order to facilitate the installation of the device, as a further solution of the embodiment of the present invention, an installation groove 602 is provided at the bottom of the base 600, and an installation block 810 connected in a sliding manner is arranged in the installation groove 602. A support rod 800 is fixedly connected to the bottom of the installation block 810.

[0045] Please refer to Figure 2 、 Figures 7-11 Figure 2 , in order to achieve the separation between the support rod 800 and the base 600 on the ground and improve the safety and reliability of the work, as a further solution of the embodiment of the present invention, a second adjustment groove 811 is provided inside the installation block 810, and a first adjustment groove 802 communicating with the second adjustment groove 811 is provided at the top of the support rod 800. A fourth sliding hole 801 is provided in the middle of the support rod 800 below the first adjustment groove 802. A rotating rod 700 connected in a sliding manner is installed in the fourth sliding hole 801. A top column 710 is fixedly connected to the end of the rotating rod 700. The top column 710 can slide in the first adjustment groove 802 and the second adjustment groove 811. The lower half of the top column 710 is cylindrical, and the lower half of the top column 710 is frustum-shaped. Two wall grooves 814 are provided on the side wall of the second adjustment groove 811. Spring grooves 813 are provided on the groove walls of the wall grooves 814. Second fixing holes 812 are provided on the groove walls of the spring grooves 813. Fixing rods 820 are slidably installed in the second fixing holes 812. End blocks 830 are fixedly installed at the ends of the fixing rods 820. The end blocks 830 are slidably connected to the wall grooves 814. Second springs 840 are sleeved on the fixing rods 820. One end of the second spring 840 is fixedly connected to the groove wall of the spring groove 813, and the other end of the second spring 840 is fixedly installed on the surface of the end block 830; two through first fixing holes 603 are provided on the inner wall of the installation groove 602, and the second fixing holes 812 and the first fixing holes 603 have the same aperture.

[0046] Please refer to Figure 10 Figure 10 , in order to facilitate the adjustment of the fixation or disassembly between the support rod 800 and the base 600, as a further solution of the embodiment of the present invention, a second thread 701 is provided on the surface of the rotating rod 700, and a third thread 803 is provided in the fourth sliding hole 801. The rotating rod 700 and the support rod 800 are threadedly connected through the cooperation of the second thread 701 and the third thread 803.

[0047] Please refer to Figure 7 Figure 7 For the convenience of the cooperation between the first fixing hole 603 and the second fixing hole 812, as a further solution of the embodiment of the present invention, an anti-fooling strip 850 is fixedly installed on the surface of the mounting block 810, and an anti-fooling groove adapted to the anti-fooling strip 850 is opened in the mounting groove 602, so as to ensure that after the support rod 800 is inserted into the mounting groove 602, the center lines of the first fixing hole 603 and the second fixing hole 812 are on the same straight line.

[0048]

[0048] During use, place the tubular busbar between the upper shunt conductive arm 100 and the lower shunt conductive arm 300. By adjusting the height of the lower shunt conductive arm 300, the tubular busbar is clamped. After the initial clamping is completed, fix the adjusting column 400 by tightening the first nut 430. After the fixing is completed, rotate the second nut 540. By rotating the second nut 540, the sliding sleeve 530 moves upward. The sliding sleeve 530 squeezes the first spring 520. The first spring 520 applies pressure to the upper shunt conductive arm 100 on the tubular busbar through its own elastic potential energy, so as to maintain the clamping force of the conductive part for a long time, improve the conductive ability, and prevent heating;

[0049]

[0049] After the clamping of the tubular busbar is completed, the device is sent to the designated position for installation through the support rod 800, and the support rod 800 is disassembled from the device after the installation is completed; when it is necessary to disassemble the tubular busbar from the device, only need to connect the support rod 800 to the base 600, and then loosen the second nut 540 to make the spring loose, and the clamping of the lower shunt conductive arm 300 on the tubular busbar becomes loose. Then, stabilize the device through the support rod 800, and then use another clamping tool to clamp the tubular busbar from the device to complete the disassembly of the tubular busbar;

[0050] The installation and disassembly process between the support rod 800 and the base 600 is as follows:

[0051]

[0051] By rotating the rotating rod 700, the rotating rod 700 moves upward to drive the ejector post 710 to move upward. Since the upper half of the ejector post 710 is frustum-shaped, cooperating with the upper end block 830, the upward movement of the ejector post 710 can push the fixing rod 820 out of the second fixing hole 812 little by little until the fixing rod 820 is pushed into the first fixing hole 603 to complete the connection between the support rod 800 and the base 600; when disassembly is required, only rotate the rotating rod 700 in the reverse direction, and the fixing rod 820 is retracted into the second fixing hole 812 by the elastic force of the second spring 840 to complete the disassembly.

[0052] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A 35kV and above tubular busbar live short-circuit device, characterized in that: The device comprises an upper shunt conductive arm (100) and a lower shunt conductive arm (300), the end of the upper shunt conductive arm (100) is fixedly connected to a fixed arm (200), the upper surface and the lower surface of the fixed arm (200) are both provided with a slide groove (203), the slide groove (203) is provided with a first slide hole (201), the side of the fixed arm (200) is provided with a side groove (202), and the side groove (202) is connected to the first slide hole (201); Two end plates (310) are fixedly installed at the end of the lower shunt conductive arm (300), and the two end plates (310) are respectively slidably installed on the surfaces of the two slide grooves (203). The surfaces of the two end plates (310) are both provided with second slide holes (311). The middle of the first slide hole (201) and the second slide hole (311) passes through a slidingly connected adjustment column (400). A connecting block (410) is fixedly installed on the side of the adjustment column (400). The connecting block (410) is slidably connected to the side groove (202). A threaded column (420) is fixedly connected to the side of the connecting block (410), and a first nut (430) is threadedly connected on the threaded column (420); A base (600) is fixedly installed at the bottom of the fixed arm (200), and two third sliding holes (601) are provided at the end of the base (600). Two fixed blocks (500) are fixedly installed at the bottom of the lower shunt conductive arm (300), and the bottoms of the fixed blocks (500) are fixedly connected with first rods (510), and the two first rods (510) pass through the two third sliding holes (601) respectively. The first rods (510) are sleeved with first springs (520), and the first The end of a spring (520) is fixedly connected to the fixed block (500); a sliding sleeve (530) is slidably connected to the upper sleeve of the first rod (510) below the first spring (520); the sliding sleeve (530) can pass through the third sliding hole (601); a first thread (511) is provided on the lower end surface of the first rod (510); and a second nut (540) threadedly connected to the first thread (511) is installed on the first rod (510) below the sliding sleeve (530).

2. The 35kV and above tubular busbar live short-circuit device according to claim 1 is characterized in that: Both ends of the adjustment column (400) are fixedly connected to limit blocks (440), and the two limit blocks (440) are respectively attached to the surfaces of the two end plates (310), and the limit blocks (440) and the end plates (310) can slide relative to each other.

3. The 35kV and above tubular busbar live short-circuit device according to claim 1 is characterized in that: The upper shunt conductive arm (100) has an upper clamping groove (101) on its bottom surface, and a plurality of upper protrusions (102) are arranged in the upper clamping groove (101); the lower shunt conductive arm (300) has a lower clamping groove (301) on its top surface, and a plurality of lower protrusions (302) are arranged in the lower clamping groove (301).

4. The 35kV and above tubular busbar live short-circuit device according to claim 1 is characterized in that: The base (600) has a mounting groove (602) at the bottom, a slidably connected mounting block (810) is arranged in the mounting groove (602), and a support rod (800) is fixedly connected to the bottom of the mounting block (810).

5. The 35kV and above tubular busbar live short-circuit device according to claim 4 is characterized in that: A second adjustment groove (811) is provided inside the mounting block (810); a first adjustment groove (802) which is connected to the second adjustment groove (811) is provided on the top of the support rod (800); a fourth sliding hole (801) is provided in the middle of the support rod (800) below the first adjustment groove (802); a slidably connected rotating rod (700) is installed in the fourth sliding hole (801); a top column (710) is fixedly connected to the end of the rotating rod (700); the top column (710) can slide in the first adjustment groove (802) and the second adjustment groove (811); the lower half of the top column (710) is cylindrical; the lower half of the top column (710) is truncated; the side wall of the second adjustment groove (811) is provided with two wall grooves (814); the wall groove (81 4) are provided with spring grooves (813), and the groove walls of the spring grooves (813) are provided with second fixing holes (812), a fixing rod (820) is slidably installed in the second fixing hole (812), an end block (830) is fixedly installed at the end of the fixing rod (820), and the end block (830) is slidably connected to the wall groove (814), a second spring (840) is sleeved on the fixing rod (820), one end of the second spring (840) is fixedly connected to the groove wall of the spring groove (813), and the other end of the second spring (840) is fixedly installed on the surface of the end block (830); the inner wall of the installation groove (602) is provided with two penetrating first fixing holes (603), and the second fixing hole (812) has the same aperture as the first fixing hole (603).

6. The 35kV and above tubular busbar live short-circuit device according to claim 5 is characterized in that: The rotating rod (700) is provided with a second thread (701) on its surface, and the fourth sliding hole (801) is provided with a third thread (803). The rotating rod (700) and the supporting rod (800) are threadedly connected by the cooperation of the second thread (701) and the third thread (803).

7. The 35kV and above tubular busbar live short-circuit device according to claim 5 is characterized in that: An anti-idiot strip (850) is fixedly mounted on the surface of the mounting block (810), and an anti-idiot groove matching the anti-idiot strip (850) is provided in the mounting groove (602).

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