CN110890644A - Looped netowrk cabinet T-shaped cable head grounding device and method - Google Patents

Abstract

The invention relates to the field of grounding equipment, in particular to a grounding device and method for a T-type cable head of a ring network cabinet. The ring main unit T-type cable head grounding device is used for grounding the T-type cable head. The T-type cable head is provided with a copper nose inside, and the copper nose has a through hole, including insulating rods, conductive rods, bending The two ends of the conductive rod are respectively connected with the insulating rod and the bending part. The conductive rod is installed with a pull rod sheet that can move forward and backward. The pull rod sheet moves forward to drive the bending part to shrink, so as to pass through the through hole of the copper nose, and the pull rod sheet Backward movement drives the bending piece to expand to both sides, so that the copper nose is clamped between the conductive rod and the bending piece. The invention has simple structure and convenient operation, can prevent dust from entering the T-shaped cable head, and improve work efficiency.

Description

A kind of ring network cabinet T-type cable head grounding device and method

technical field

The invention relates to the field of grounding equipment, in particular to a grounding device and method for a T-type cable head of a ring network cabinet.

Background technique

The 10KV ring main unit has superior electrical performance and beautiful appearance, and is widely used in power distribution networks. However, in the daily operation and maintenance, there will be some problems, such as the overvoltage of the system causing the explosion of the voltage transformer of the ring main unit, the humid operating environment in the coastal area, the short circuit between phases of the incoming and outgoing cables or the relative discharge of the ring main unit, etc. Forced to fail to stop running. When these faults cause the ring network cabinet to stop running, the test personnel must perform power failure maintenance and electrical performance tests on the ring network cabinet.

Before conducting the electrical performance test of the ring network cabinet, all the cable heads of the incoming and outgoing lines of the ring main unit should be removed first, and the grounding wire should be suspended to prevent the other end of the cable from being mistakenly transmitted and threatening the personal safety of the test personnel at this end of the cable. . At present, the cable heads of the ring network cabinet are all T-shaped cable heads. When this kind of cable head hangs the grounding wire, the T-shaped sheath must be removed first, and then the existing grounding wire should be used to hang it firmly. This method is more troublesome. At the same time, when removing the T-type cable sheath, it should be sealed with a dust-free bag to prevent dust pollution. The cable core after removing the sheath should also take dust-proof measures to protect the cable core. Otherwise, the electric field of the cable head will be unevenly distributed after the cable head with dust is powered on, which will eventually lead to the insulation breakdown of the cable head. This practice increases the workload of staff.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a grounding device and method for the T-type cable head of the ring network cabinet, which is simple in structure, convenient in operation, can prevent dust from entering the T-type cable head, and improve work efficiency.

For achieving the above object, the technical scheme adopted in the present invention is as follows:

A T-type cable head grounding device for a ring network cabinet is used for grounding the T-type cable head. The inside of the T-type cable head is provided with a copper nose, and the copper nose is provided with a through hole, including insulating rods, conductive rods, bending The two ends of the conductive rod are respectively connected with the insulating rod and the bending part. The conductive rod is installed with a pull rod sheet that can move forward and backward. The pull rod sheet moves forward to drive the bending part to shrink so as to pass through the copper nose hole, the pull rod piece moves backwards to drive the bending piece to expand to both sides, so as to clamp the copper nose between the conductive rod and the bending piece. .

Further, one end of the conductive rod is provided with a fixed column, a movable cavity is opened inside the conductive rod, the movable cavity penetrates the fixed column, and the upper and lower sides of the fixed column are respectively rotatably connected to a bending piece. There is a gap between which can accommodate the pull rod piece, the gap is communicated with the movable cavity, and the pull rod piece is movably arranged in the movable cavity and the gap.

Further, the tie rod piece is in the shape of a long strip, one end of the tie rod piece is provided with a connecting hole, and the other end is provided with a clamping tooth, the clamping teeth are arranged on both sides of the tie rod piece, the conductive rod is provided with an operating section, and the operating section is provided. It includes an inner pipe body and an outer sleeve. The two sides of the inner pipe body are provided with long holes communicating with the movable cavity. The outer sleeve is arranged on the inner pipe body and the inner wall of the outer sleeve is provided with threads. Passing through the elongated hole is matched with the thread of the outer sleeve, and the rotation of the outer sleeve drives the tie rod to move linearly in the axial direction.

Further, the outer sleeve includes an upper cylinder, a lower cylinder, and a number of screws, and the contact part of the upper cylinder and the lower cylinder is respectively provided with a number of screw holes, and the screw holes correspond one by one, and the screws pass through the screw holes, In order to lock the upper cylinder body and the lower cylinder body.

Further, the bending piece includes a first tongue piece and a second tongue piece, the two ends of the first tongue piece are respectively rotatably connected to the fixing column and the second tongue piece, and the second tongue piece is rotatably connected to the connecting hole of the pull rod piece. On the pull rod piece, the outer surface of the first tongue piece and the second tongue piece are arc-shaped surfaces, and the inner surface is flat. columnar.

Further, it also includes a protective cover, the protective cover is slidably sleeved on the conductive rod, the protective cover has an umbrella-like structure, and the opening of the protective cover is disposed toward the direction of the bending piece.

Further, the protective cover is made of rubber material.

Further, a rubber handle is sleeved on the insulating rod.

A method for grounding a T-type cable head of a ring network cabinet, the method steps are as follows:

Step 1, one end of the ground wire is connected to the conductive rod, the other end is connected to the ground terminal, and the ground terminal is installed on the field grounding flat iron;

Step 2: Hold the insulating rod covered with the rubber glove with one hand, and turn the outer sleeve with the other hand. The threads in the outer sleeve are matched with the teeth on the pull rod piece. The rotation of the outer sleeve makes the pull rod piece move forward in a straight line to drive the The two bending parts shrink inward to form a column;

Step 3: Insert the bending part of step 2 from one end of the T-shaped cable head, and the bending part passes through the through hole of the copper nose, so that the copper nose is sleeved on the fixing column of the conductive rod through the bending part, and the same as step 2. Rotate the outer sleeve in the opposite direction, the threads in the outer sleeve are matched with the teeth on the tie rod, and the rotation of the outer sleeve makes the tie rod move backwards in a straight line, driving the bending parts to expand to both sides, so as to clamp the copper nose to the conductive rod. On the fixed column, at this time, the grounding of the cable head is completed.

As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:

The invention can ground the T-type cable head without removing the sheath of the T-type cable head; through the arrangement of the bending part, the copper nose can be clamped on the fixing column of the conductive rod, so that the T-type cable head is well grounded; By adding a protective cover, when the T-type cable head is grounded, dust can be prevented from entering the T-type cable head, so as to avoid the uneven distribution of the electric field caused by the sticking of dust on the cable head; and the protective cover can effectively block the arc and prevent the arc from hurting the hands of the staff. The invention can ground the cable head without removing the terminal sleeve of the T-shaped cable head, greatly reduces the operation time, reduces the work intensity of the staff, and is convenient to carry.

Description of drawings

FIG. 1 is a front view of a grounding device for a T-type cable head of a ring main unit according to a specific embodiment of the present invention.

2 is a top view of a grounding device for a T-type cable head of a ring network cabinet according to a specific embodiment of the present invention.

FIG. 3 is a schematic diagram of inserting a grounding device into a T-shaped cable head according to a specific embodiment of the present invention.

4 is a schematic diagram of another state in which the grounding device according to the specific embodiment of the present invention is inserted into the T-shaped cable head.

5 is a perspective view of a grounding device for a T-type cable head of a ring network cabinet according to a specific embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a tie rod piece according to a specific embodiment of the present invention.

FIG. 7 is a schematic diagram of the grounding of a three-phase cable head according to a specific embodiment of the present invention.

In the picture: 1. T-type cable head, 11. Copper nose, 111. Through hole, 2. Insulation rod, 21. Rubber handle, 3. Conductive rod, 31. Drilling hole, 32. Fixed column, 33. Active cavity , 34. Operation section, 35. Inner tube, 351. Long hole, 36. Outer casing, 361. Thread, 362. Upper cylinder, 363. Lower cylinder, 364. Screw hole, 4. Bending piece, 41. Clearance, 42. First tongue piece, 43. Second tongue piece, 5. Pull rod piece, 51. Connection hole, 52. Clip, 6. Ground wire, 61. Wire nose, 7. Ground terminal, 8. protecting mask.

Detailed ways

The present invention will be further described below through specific embodiments.

1 to 7 , a grounding device for a T-type cable head of a ring network cabinet of the present invention is used for grounding the T-type cable head 1. The T-type cable head 1 is provided with a copper nose 11 inside, and the copper nose 11 has a A through hole 111, a ring main unit T-type cable head grounding device includes an insulating rod 2, a conductive rod 3, a bending piece 4, a tie rod piece 5, a ground wire 6, a ground end 7, and a protective cover 8.

There is a drill hole 31 on the conductive rod 3, a wire nose 61 is crimped on the ground wire 6, the through hole of the wire nose 61 corresponds to the drill hole 31 on the conductive rod 3, and the ground wire 6 is connected with the conductive rod 3 through bolt connection. , the other end of the ground wire 6 is provided with a ground terminal 7, and the ground terminal 7 is installed on the field grounding flat iron.

A rubber handle 21 is sleeved on the insulating rod 2. One end of the conductive rod 3 is connected to the insulating rod 2, and the other end is provided with a fixed column 32. A movable cavity 33 is opened inside the conductive rod 3. The upper and lower sides of the column 32 are respectively rotatably connected to a bending piece 4. There is a gap between the bending pieces 4 that can accommodate the pull rod piece 5. The gap 41 between the bending pieces 4 is communicated with the movable cavity 33, and the pull rod piece 5 is movable. through the gap 41 provided in the movable cavity 33 and between the bending parts 4 .

The pull rod piece 5 is in the shape of a long strip. One end of the pull rod piece 5 is provided with a connecting hole 51 , and the other end is provided with a locking tooth 52 , and the locking tooth 52 is provided on both sides of the pull rod piece 5 . The conductive rod 3 is provided with an operation section 34, the operation section 34 includes an inner tube body 35 and an outer sleeve 36, both sides of the inner tube body 35 are provided with elongated holes 351 communicating with the movable cavity 33, and the outer sleeve 36 is arranged on the inner tube body 35. The inner wall of the outer sleeve 36 is provided with a thread 361, and the teeth 52 of the tie rod piece 5 pass through the elongated hole 351 to match the thread of the outer sleeve 36. When the outer sleeve 36 rotates, the tie rod piece 5 is moved in a straight line in the axial direction. . The outer sleeve 36 includes an upper cylinder 362, a lower cylinder 363, and a number of screws. The contact portion of the upper cylinder 362 and the lower cylinder 363 is respectively provided with a number of screw holes 364. The upper cylinder 362 and the lower cylinder 363 have screw holes 364. In one-to-one correspondence, insert screws through the screw holes 364 to lock the upper cylinder 362 and the lower cylinder 363 tightly.

There are two bending pieces 4 , which are arranged up and down respectively. The bending piece 4 includes a first tongue piece 42 and a second tongue piece 43 . The two ends of the first tongue piece 42 are respectively connected with the fixing column 32 and the second tongue piece 43 in rotation. , the second tongue piece 43 is rotatably connected to the pulling rod piece 5 through the connecting hole 51 of the pulling rod piece 5, the outer surface of the first tongue piece 42 and the second tongue piece 43 are arc-shaped surfaces, the inner surface is flat, and the pulling rod piece 5 is forward The movement causes the first tongue piece 42 and the second tongue piece 43 to contract inwardly to form a column shape through which the copper nose 11 can pass. Pass the columnar bending piece 4 through the copper nose 11, so that the copper nose 11 is sleeved on the fixing column 32 of the conductive rod 3 through the bending piece 4, and the outer sleeve 36 is rotated to make the pull rod piece 5 move backwards in a straight line , drive the bending piece 4 to expand outward toward the connection between the first tongue piece 42 and the second tongue piece 43 to clamp the copper nose 11 on the fixing column 32 of the conductive rod 3, so that the T-type cable head 1 is well grounded .

The protective cover 8 is made of rubber material. The protective cover 8 is slidably sleeved on the conductive rod 3 . The protective cover 8 has an umbrella-shaped structure. The protective cover 8 slides on the conductive rod 3, so that the protective cover 8 blocks the opening of the T-type cable head 1 to prevent dust from entering the T-type cable head 1 and avoid uneven distribution of the electric field of the T-type cable head 1; When the cable head 1 suddenly calls, the charged T-type cable head 1 will discharge the electric conductor and generate an arc, and the protective cover 8 can effectively block the arc to protect the safety of the staff.

The working steps of the T-type cable head grounding device of the ring main unit are as follows:

Step 1, one end of the ground wire 6 is connected to the conductive rod 3, the other end is connected to the ground terminal 7, and the ground terminal 7 is installed on the field grounding flat iron;

Step 2: Hold the insulating rod 2 covered with the rubber handle gloves 21 with one hand, and turn the outer sleeve 36 with the other hand. The threads 361 in the outer 36 Rotation makes the tie rod piece 5 move forward in a straight line, so as to drive the two bending parts 4 to shrink inward to form a column;

In step 3, insert the bending piece 4 in step 2 from one end of the T-shaped cable head 1, and the bending piece 4 passes through the through hole 111 of the copper nose 11, so that the copper nose 11 is sleeved on the conductive rod 3 through the bending piece 4. On the fixing column 32, rotate the outer sleeve 36 in the opposite direction as in step 2, the threads 361 in the outer sleeve 36 are matched with the teeth 52 on the pull rod piece 5, and the outer sleeve 36 rotates so that the pull rod piece 5 makes a straight line backward The movement drives the bending member 4 to expand to both sides to clamp the copper nose 11 on the fixing column 32 of the conductive rod 3. At this time, the grounding of one-phase cable head is completed, and the grounding method of the remaining two-phase cable heads is the same as above.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, and any non-substantial changes to the present invention by using this concept should be regarded as violations of the protection scope of the present invention.

Claims (9)

1. A ring network cabinet T-type cable head grounding device is used for grounding the T-type cable head, the inside of the T-type cable head is provided with a copper nose, and the copper nose has a through hole, characterized in that: comprising an insulating rod , Conductive rods, and bending parts. The two ends of the conductive rods are respectively connected with the insulating rods and the bending parts. The conductive rods are installed with pull rods that can move back and forth, and the pull rods move forward to drive the bending parts to shrink, so as to Passing through the through hole of the copper nose, the pull rod piece moves backwards to drive the bending piece to expand to both sides, so as to clamp the copper nose between the conductive rod and the bending piece. The grounding wire is installed on the conductive rod. The other end is provided with a ground terminal. 2. A T-type cable head grounding device for ring main unit according to claim 1, characterized in that: one end of the conductive rod is provided with a fixed column, a movable cavity is opened inside the conductive rod, and the movable cavity penetrates out of A fixed column, the upper and lower sides of the fixed column are respectively connected with a bending piece rotatably, there is a gap between the bending pieces that can accommodate the pull rod piece, the gap is communicated with the movable cavity, and the pull rod piece can movably penetrate through the inside the movable cavity and the gap. 3. A ring main unit T-type cable head grounding device according to claim 2, characterized in that: the tie rod piece is in the shape of a long strip, one end of the tie rod piece is provided with a connecting hole, and the other end is provided with a clamping tooth, and the clamping The teeth are arranged on both sides of the pull rod piece, the conductive rod is provided with an operation section, and the operation section includes an inner tube body and an outer sleeve, the two sides of the inner tube body are provided with elongated holes communicating with the movable cavity, and the outer sleeve It is arranged on the inner tube body and the inner wall of the outer sleeve is provided with threads. The clamping teeth of the tie rod pieces pass through the elongated holes to match with the threads of the outer sleeve. The rotation of the outer sleeve drives the tie rod pieces to move linearly in the axial direction. 4. A ring main unit T-type cable head grounding device according to claim 3, characterized in that: the outer sleeve comprises an upper cylinder, a lower cylinder, and a plurality of screws, and the contact part of the upper cylinder and the lower cylinder A plurality of screw holes are respectively opened, and the screw holes correspond one by one, and the upper cylinder body and the lower cylinder body are locked by passing through the screw holes through screws. 5 . The T-type cable head grounding device of the ring main unit according to claim 2 , wherein the bending member comprises a first tongue piece and a second tongue piece, and both ends of the first tongue piece are respectively fixed to The column and the second tongue piece are rotatably connected, the second tongue piece is rotatably connected to the tie rod piece through the connecting hole of the tie rod piece, the outer surface of the first tongue piece and the second tongue piece are arc-shaped surfaces, the inner surface is flat, and the tie rod piece is forward The movement makes the first tongue piece and the second tongue piece shrink inward to form a column shape that can pass the copper nose. 6 . The T-type cable head grounding device of a ring network cabinet according to claim 1 , further comprising a protective cover, the protective cover is slidably sleeved on the conductive rod, and the protective cover has an umbrella-shaped structure. 7 . , the opening of the protective cover is arranged in the direction of the bending part. 7 . The T-type cable head grounding device of a ring network cabinet according to claim 6 , wherein the protective cover is made of rubber material. 8 . 8 . The T-type cable head grounding device of a ring network cabinet according to claim 1 , wherein a rubber handle is sleeved on the insulating rod. 9 . 9. A method for grounding a T-type cable head of a ring main unit, characterized in that: the method steps are as follows: Step 1, one end of the ground wire is connected to the conductive rod, the other end is connected to the ground terminal, and the ground terminal is installed on the field grounding flat iron; Step 2: Hold the insulating rod covered with the rubber glove with one hand, and turn the outer sleeve with the other hand. The threads in the outer sleeve are matched with the teeth on the pull rod piece. The rotation of the outer sleeve makes the pull rod piece move forward in a straight line to drive the The two bending parts shrink inward to form a column; Step 3: Insert the bending part of step 2 from one end of the T-shaped cable head, and the bending part passes through the through hole of the copper nose, so that the copper nose is sleeved on the fixing column of the conductive rod through the bending part, and the same as step 2. Rotate the outer sleeve in the opposite direction, the threads in the outer sleeve are matched with the teeth on the tie rod, and the rotation of the outer sleeve makes the tie rod move backwards in a straight line, driving the bending parts to expand to both sides, so as to clamp the copper nose to the conductive rod. On the fixed column, at this time, the grounding of the cable head is completed.

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