A quick adjustable hand-cranking mechanical transmission type cross interconnection grounding box

Abstract

The application discloses a quick adjustable hand-cranking mechanical transmission type cross interconnection grounding box, which comprises a cable conduction assembly, a hand-cranking position switching assembly, a plug connection copper bar and a sheath protector assembly; the cross interconnection - same phase interconnection wiring mode can be switched through the hand-cranking transmission plug-in position switching mode, internal wiring switching operation can be directly performed, and the complicated process in the current working procedure is simplified; the work efficiency of the repair work is greatly improved, the operation risk of the power grid is reduced, the load loss is recovered, and the personal safety is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of long-distance single-core power transmission cables, specifically a fast-adjustable hand-cranked mechanical transmission type cross-interconnection grounding box. Background Technology

[0002] Cross-connection grounding boxes can effectively reduce the induced voltage of the cable sheath while ensuring that the cable's metal sheath forms an overvoltage release channel, thus providing a guarantee for the long-term safe and stable operation of the cable and preventing abnormal overheating of the cable under high load conditions.

[0003] The metal sheaths of long-distance, complex high-voltage cables are grounded using a cross-interconnection method. The metal sheaths of the cables at both ends of the joint are led out by coaxial cables and connected to the grounding box. The internal wiring of the grounding box uses a fixed connection method with copper busbars and post heads. When performing fault finding work or routine testing, the grounding box needs to be disassembled, the internal copper busbars removed, or removed and short-circuited with a self-provided wiring in the same phase.

[0004] When the cable line is long and there are many grounding boxes, the existing grounding boxes often require 3 to 4 hours to disassemble and replace the wiring, which seriously slows down the repair progress, not only causing load loss, but also exposing personnel to the danger of working in confined spaces for a long time. Summary of the Invention

[0005] The main objective of this invention is to provide a fast-adjustable, hand-cranked mechanical transmission cross-interconnection grounding box with high working efficiency and low operational risk.

[0006] The present invention provides a fast-adjustable hand-cranked mechanical transmission type cross-interconnection grounding box, comprising a cable conduction assembly, a hand-cranked transposition assembly, a plug connection copper busbar, and a sheath protector assembly. The cable conduction assembly includes a cable limiting component, a rotating copper rod, and a column copper busbar. The cable limiting component and the column copper busbar are movably connected by the rotating copper rod, and the column copper busbar is disposed on the insulating plate of the hand-cranked transposition assembly. The plug connection copper busbar includes a connector, a wire plug, and a protector connector. The connector and the wire plug are connected to each other, and the wire plug is connected to the protector connector. The movable column on the column copper busbar is connected to the connector of the plug connection copper busbar. When the hand-cranked transposition assembly is cranked, the insulating plate and the column copper busbar are transposed. After the movable column is displaced, it connects to the connector at the other end, realizing line switching. The sheath protector assembly includes a grounding plug, a cranking screw, and a sheath protector. The sheath protector is displaced by cranking the screw, and its connection and disconnection states with the protector connector can be switched.

[0007] In one embodiment of the above-mentioned grounding box, the cable limiting member is disposed on a C-shaped copper busbar; the cable limiting member is composed of two rectangular blocks arranged opposite each other with a semi-circular ring in the center, and the two rectangular blocks are fastened and loosened by bolts; the C-shaped copper busbar is arranged vertically, and the cable limiting member is fixed to its top.

[0008] In one embodiment of the above-mentioned grounding box, the rotating copper rod is two long copper rods that are hinged together, and the other end of each rod is hinged to the rear side of the C-shaped copper busbar and the front end of the column copper busbar, respectively.

[0009] In one embodiment of the above-mentioned grounding box, the rear end of the copper busbar is provided with a movable head, which horizontally penetrates the copper busbar and is fixed to the copper busbar by the shorter side.

[0010] In one embodiment of the above-mentioned grounding box, the hand-cranked switching assembly includes a crank handle, a lead screw assembly, a flange seat, and an insulating plate; the crank handle is connected to the right side of the lead screw assembly, the flange seat is slidably sleeved on the lead screw, and the insulating plate is fixed to the flange seat by screws; the bottom end of the column head copper busbar is fixed to the insulating plate by a support member.

[0011] In one embodiment of the aforementioned grounding box, the plug connecting copper busbar includes a copper busbar support, a connecting copper busbar, a connector, a wire plug, and a protector connector; the copper busbar support is fixed to the grounding box, and the connecting copper busbar is fixed to the copper busbar support via a connecting plate; multiple connectors are fixed side-by-side on the connecting copper busbar via copper plates, and each connector can be correspondingly fitted onto the movable column head; the other end of the copper plate is fixed to the copper busbar support, and a wire plug is provided at its upper end; the other end of the wire plug is provided with a ring-shaped protector connector.

[0012] In one embodiment of the aforementioned grounding box, the sheath protector assembly includes a protector support, a grounding plug, a limiting rod, a sliding plate, a rocking screw, and a sheath protector. A grounding plug is provided on the left side of the protector support. The limiting rod is fixed to both sides of the protector support and the copper busbar support, and the sliding plate is mounted on the limiting rod. The rocking screw passes through and connects to the protector support, the sliding plate, and the copper busbar support. Rotating the rocking screw controls the sliding plate's forward and backward movement along the limiting rod. The sheath protector is mounted on the sliding plate, and its front end has a connecting post.

[0013] In one embodiment of the above-mentioned grounding box, both the wire plug and the ground plug are wire clamps with metal screws at their tops. By inserting the wire into the wire clamp and tightening it, the line can be clamped and connected.

[0014] In one embodiment of the above-mentioned grounding box, a flexible strap is provided inside the connector and the protector connector as a catalyst for current conduction.

[0015] In one embodiment of the above-mentioned grounding box, the bottom end of the C-shaped copper busbar is provided with a wiring plug, which is a wire clamping hardware structure.

[0016] The beneficial effects of this invention are as follows: the switching between cross-connection and same-connection wiring methods is achieved through a hand-cranked plug-in position switching method, which allows for direct internal wiring switching operations and simplifies the complex process in the current work steps; based on a saving of 30 minutes per box, for a long cable containing 6 boxes, the entire cable can save approximately 6 * 30 min = 3 hours of emergency repair time, which greatly improves the efficiency of emergency repair work, reduces the risk of power grid operation, recovers load losses, and ensures personal safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an isometric structure according to an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A top-view structural diagram.

[0019] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction.

[0020] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure along the BB direction.

[0021] Figure 5 This is a schematic diagram of the outer shell panel structure of the present invention. Detailed Implementation

[0022] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As can be seen, the quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box disclosed in this embodiment includes a cable conduction assembly 1, a hand-cranked transposition assembly 2, a plug connection copper busbar 3, and a sheath protector assembly 4.

[0023] The cable conduction assembly 1 includes a cable limiting component 11, a C-shaped copper busbar 12, a rotating copper rod 13, a column head copper busbar 14, and a movable column head 15.

[0024] The cable limiting component 11 consists of two rectangular blocks arranged opposite each other, each with a semi-circular ring in the center. The two rectangular blocks are fastened and loosened by bolts. The C-shaped copper busbar 12 is vertically arranged, and its top is fixed by the cable limiting component.

[0025] The rotating copper rod 13 consists of two long copper rods that are hinged together. The other end of each rod is hinged to the rear side of the C-shaped copper busbar 12 and the front end of the column copper busbar 14, respectively.

[0026] The rear end of the column head copper busbar 14 is provided with a movable column head 15, which horizontally penetrates the column head copper busbar and is fixed to the column head copper busbar by the shorter side.

[0027] The hand-cranked position changer 2 includes a crank handle 21, a lead screw assembly 22, a flange seat 23, and an insulating plate 24.

[0028] The crank handle 21 is connected to the right side of the lead screw assembly 22, the flange seat 23 is slidably sleeved on the lead screw, and the insulating plate 24 is fixed to the flange seat by screws.

[0029] The bottom end of the column head copper busbar 14 is fixed to the insulating plate 24 below by a support member.

[0030] The cable conduction assemblies are arranged in three groups side by side, namely Group A, Group B, and Group C. Each copper busbar 14 is fixed to the same insulating plate by a support. The connection limits between the crimping hardware enhance the structural strength.

[0031] When the crank 21 is turned, the flange seat 23 can be controlled to move the insulating plate 24 left and right, and the copper busbars 14 and movable columns 15 on the insulating plate move synchronously.

[0032] The plug connection copper busbar 3 includes a copper busbar support 31, a connecting copper busbar 32, a connector 33, a wire plug 34, and a protector connector 35.

[0033] The copper busbar support 31 is fixed to the grounding box, and the connecting copper busbar 32 is fixed to the copper busbar support by two connecting plates on both sides. Three connectors 33 are fixed to the connecting copper busbar in parallel by copper plates. The three connectors can be fitted onto the movable post 15 of the cable conduction assembly 1, and the connectors are equipped with flexible straps inside as catalysts to conduct current and make the overall line flexibly conductive.

[0034] The other ends of the three copper plates are fixed to the copper busbar support 31, and each copper plate has a wire clamp plug 34 at its upper end. The wire clamp plug is a wire clamping hardware, and a metal screw is set at the top of the wire clamping hardware. The wire is put into the wire clamping hardware and tightened to clamp the line and connect it.

[0035] The other end of each wire plug 34 is provided with a ring-shaped protector connector 35, which is connected to the wire plug via a flexible strap.

[0036] The sheath protector assembly 4 includes a protector support 41, a grounding plug 42, a limit rod 43, a sliding plate 44, a rocking screw 45, and a sheath protector 46.

[0037] A grounding plug 42 is provided on the left leg of the protector support 41. The grounding plug is a wire clamp structure.

[0038] Two limiting rods 43 are fixed to both sides of the protector support and the copper busbar support, and a sliding plate 44 is mounted on the limiting rods. A rocking screw 45 passes through and connects to the protector support, the sliding plate, and the copper busbar support. Rotating the rocking screw 45 controls the forward and backward movement of the sliding plate along the limiting rods.

[0039] Three sheath protectors 46 are sequentially arranged on the sliding plate. Each sheath protector has a connecting post at its front end, which is located at the other end of the sliding plate. When the sliding plate approaches the copper busbar support, the connecting post can be inserted into the protector connector 35 of the plug-connected copper busbar 3.

[0040] In addition, for testing purposes, each of the three sets of C-shaped copper busbars 12 is equipped with a wire clamp at its bottom, which is connected to the C-shaped copper busbar.

[0041] like Figure 5 As shown, the outer shell of the grounding box is provided with an external test conductor port 51, an internal test conductor port 52, a coaxial cable inlet 53, and a grounding wire port 54.

[0042] The three test line external conductor ports 51 can be connected to the wire clamps at the bottom of the C-shaped copper busbar 12, the three test line internal conductor ports 52 can be connected to the wire clamp plugs 34 on the plug connection copper busbar 3, the three coaxial cable inlets 53 can be connected to the cable limiting member 11, and the grounding wire port 54 can be connected to the grounding wire plug 42 of the interlayer protector assembly 4.

[0043] When using this grounding box, three coaxial cables (A, B, and C phases) enter the box through the three coaxial cable inlets 53 at the front of the box.

[0044] After the insulation layer of the coaxial cable is stripped off, the exposed outer conductor is placed in the middle of the cable limiting member 11 and pressed into its two semi-circular holes after being tightened by screws. Meanwhile, the inner conductor of the coaxial cable is wrapped in insulation and continues forward to the position of the crimp plug 34. The crimping hardware presses the inner conductor after the insulation has been stripped off by tightening screws.

[0045] The grounding cable enters the enclosure through grounding port 54 and is fixed by clamping hardware.

[0046] The other end of the coaxial cable enters through the conductor port 52 inside the test line and is fixed by the wire clamp.

[0047] The three-phase cables ABC are respectively connected and fixed to the three sets of cable conduction components ABC. In this embodiment, the three cables from right to left are the three-phase lines A, B, and C.

[0048] The sequence of components for conducting phase A is as follows: outer conductor of phase A → cable limiting component → C-shaped copper busbar → rotating copper rod → copper busbar with column head → movable column head of phase A → connector of phase A → connecting copper busbar → wire plug → inner conductor of phase A.

[0049] The coaxial cable for phases B and C has a similar current-conducting structure to phase A.

[0050] When the crank handle 21 is rotated, the connection of the inner and outer conductors of the three coaxial cables A, B, and C will change.

[0051] When the crank handle 21 is turned, the flange seat 23 moves the insulating plate 24 to the left. The copper busbars 14 and movable heads 15 on the insulating plate move synchronously until the three movable heads disengage from the three connectors A, B, and C. At this time, the inner and outer conductors of the three coaxial cables A, B, and C are no longer connected and are in an open state.

[0052] Continue rotating the crank handle 21, and the A movable pin will continue to move to the left, eventually inserting into the B connector. At this point, the connection status is:

[0053] A-phase outer conductor → cable limiting component → C-shaped copper busbar → rotating copper rod → column head copper busbar → A movable column head → B connector → connecting copper busbar → wire plug → B-phase inner conductor.

[0054] The coaxial cables for phases B and C have a similar current-conducting structure to phase A, with a D connector to the left of the C connector, which connects to the A connector plug. At this point, the three coaxial cables A, B, and C are interconnected.

[0055] Under normal conditions, the sheath protector is connected to phases A, B, and C. When the rocker arm of the crank 45 is rotated, the connecting pins of the three sheath protectors can be inserted into the protector connector 35 of the copper busbar 3 and separated from the copper rod. Then the sheath protector is disconnected from phases A, B, and C, and a series of tests can be carried out.

[0056] In this embodiment, some parts of each component are insulated, while the rest are made of copper conductive material; each plug is equipped with a flexible strap as a catalyst guide tool, so that the overall conversion circuit is flexibly conductive.

[0057] The advantages of using this grounding box are:

[0058] 1. The switch between cross-connection and same-connection wiring modes is achieved through a hand-cranked plug-in position switch, allowing direct internal wiring switching operations and simplifying the complex procedures of the current work process. Assuming a saving of 30 minutes per enclosure, for a long cable containing 6 enclosures, the total repair time can be reduced by approximately 6 * 30 minutes = 3 hours, significantly improving repair efficiency, reducing grid operation risks, mitigating load losses, and ensuring personal safety.

[0059] 2. Each terminal of the enclosure is equipped with a pluggable structure, which allows for switching between metal sheath connection and disconnection via plugging and unplugging, making operation simple and quick.

[0060] 3. By setting the length of the copper busbar connecting the plug, the connecting rod structure does not interfere with each other during the phase switching process, and ensures that the insulation distance between the three phases A, B, and C exceeds 45mm, thus ensuring the equipment's withstand voltage safety.

Claims

1. A fast-adjustable, hand-cranked, mechanically driven cross-connection grounding box, characterized in that: It includes a cable continuity assembly, a hand-crank transposition assembly, a plug connection copper busbar, and a sheath protector assembly; The cable continuity assembly is set in three groups, corresponding to phases A, B, and C respectively. Each group of cable continuity assemblies includes a cable limiting component, a C-shaped copper busbar, a rotating copper rod, and a column copper busbar. The cable limiting component is set on the C-shaped copper busbar. The C-shaped copper busbar and the column copper busbar are movably connected by the rotating copper rod. The column copper busbar is set on the insulating plate of the hand-cranked transposition assembly. The rear end of the column head copper busbar is provided with a movable column head, which horizontally penetrates the column head copper busbar and is fixed to the column head copper busbar through the shorter side. The hand-cranked positioner assembly includes a crank handle, a lead screw assembly, a flange seat, and an insulating plate; the crank handle is connected to the right side of the lead screw assembly, the flange seat is slidably fitted onto the lead screw, and the insulating plate is fixed to the flange seat with screws; the bottom end of the column head copper busbar is fixed to the insulating plate by a support member; The plug connection copper busbar includes a copper busbar support, a connecting copper busbar, connectors, a wire plug, and a protector connector. The copper busbar support is fixed to the grounding box, and the connecting copper busbar is fixed to the copper busbar support via a connecting plate. Connectors A, B, C, and D are fixed in parallel on the connecting copper busbar via copper plates. Three movable posts are located in three intervals between the four connectors, with connector D connected to the corresponding wire plug of connector A via the connecting copper busbar. Each connector can be fitted onto the movable post. The other end of the copper plate is fixed to the copper busbar support, and a wire plug is provided at its upper end. A ring-shaped protector connector is provided at the other end of the wire plug. The movable column on the column head copper busbar is connected to the connector of the plug connection copper busbar; when the hand-cranked switching component is cranked, the insulating plate and the column head copper busbar are moved, and the movable column head is connected to the connector at the other end after displacement, realizing line switching. The sheath protector assembly includes a grounding plug, a cranking screw, and a sheath protector. The sheath protector is displaced by the cranking screw, which can switch the connection and disconnection states with the protector connector.

2. The rapidly adjustable hand-cranked mechanical transmission cross-connection grounding box as described in claim 1, characterized in that: The cable limiting component consists of two rectangular blocks arranged opposite each other with a semi-circular ring in the center. The two rectangular blocks are fastened and loosened by bolts. The C-shaped copper busbar is arranged vertically, and the cable limiting component is fixed to its top.

3. The quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box as described in claim 2, characterized in that: The rotating copper rod consists of two long copper rods that are hinged together, with their other ends hinged to the rear side of the C-shaped copper busbar and the front end of the column head copper busbar, respectively.

4. The quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box as described in claim 1, characterized in that: The sheath protector assembly includes a protector support, a grounding plug, a limiting rod, a sliding plate, a rocking screw, and a sheath protector. A grounding plug is provided on the left support leg of the protector support; a limiting rod is fixed on both sides of the protector support and the copper busbar support, and a sliding plate is provided on the limiting rod; a rocking screw passes through and connects to the protector support, the sliding plate and the copper busbar support; rotating the rocking screw can control the sliding plate to move back and forth along the limiting rod. The protective layer is mounted on the sliding plate, and the front end of the protective layer has a connecting column.

5. The quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box as described in claim 4, characterized in that: Both the wire plug and the ground plug are wire clamping fittings, with a metal screw at the top. By inserting the wire into the wire clamping fitting and tightening it, the circuit can be clamped and connected.

6. The quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box as described in claim 5, characterized in that: The connector and protector connector are equipped with a flexible strap inside as a catalyst guide.

7. The quick-adjustable hand-cranked mechanical transmission cross-interconnection grounding box as described in claim 1, characterized in that: The bottom end of the C-shaped copper busbar is equipped with a wiring plug, which is a wire clamping hardware structure.

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