CN109473794B - Safety low-voltage converging clamp tool - Google Patents

Abstract

The invention discloses a safe-to-use low-voltage confluence clamp tool, and aims to provide a safe-to-use low-voltage confluence clamp that can effectively avoid the potential safety hazard of electric shock to personnel during the use of the confluence clamp. Clamp tool. It includes an insulating box, a clamp located in the insulating box, a conductive connection block fixedly arranged in the insulating box, a threaded connection through hole arranged on the conductive connection block, a conductive locking rod connected with the threaded connection through hole through a thread, An external screw hole arranged on the conductive connection block, a cable connection terminal connected with the external screw hole through a screw thread, and an insulating cable sheath connected with the insulation box through a screw thread, the clamp includes a movable chuck and is fixed on the inner wall of the insulation box The first end of the conductive locking rod is connected to the movable collet, the end face of the second end of the conductive locking rod is provided with an inner hexagonal groove, and the outer surface of the insulating box is connected to the inner hexagonal groove. The operating port corresponding to the groove.

Description

Use a safe low-voltage bus clamp tool

technical field

The invention relates to a converging clamp, in particular to a safe low-voltage converging clamp tool applied to a low-voltage cable.

Background technique

With the rapid development of urban construction, the requirements for power supply reliability are getting higher and higher, and the frequency of use of various operation vehicles such as box-conversion vehicles and power generation vehicles has greatly increased. Connection tool bus clamps are often used for connection.

At present, the existing bus clamps are not only complicated in structure, but also the clamp parts used to clamp the busbars in the bus clamps are usually exposed. Although this is convenient for practical operation, it has a potential safety hazard of electric shock.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a safe low-voltage bus clamp tool that is safe to use and can effectively avoid the potential safety hazard of electric shock to personnel during the use of the bus clamp.

The technical scheme of the present invention is:

A safe-to-use low-voltage confluence clamp tool, comprising an insulation box, a clamp located in the insulation box, a conductive connection block fixedly arranged in the insulation box, a threaded connection through hole arranged on the conductive connection block, and a threaded connection through hole. The conductive locking rod with the hole connected by the thread, the external screw hole provided on the conductive connection block, the cable connection terminal connected with the external screw hole by the screw hole, and the insulating cable sheath connected with the insulating box by the screw thread, the clamp includes: The movable collet and the fixed collet fixed on the inner wall of the insulating box, the outer surface of the insulating box is provided with a socket corresponding to the clamp, and the first end of the conductive locking rod is connected to the movable clip. The heads are connected, the end face of the second end of the conductive locking rod is provided with an inner hexagonal groove, and the outer surface of the insulating box has an operation port corresponding to the inner hexagonal groove.

The safe-to-use low-voltage confluence clamp tool of this solution has a simple structure and good use safety, and can effectively avoid the potential safety hazard of electric shock to personnel during the use of the confluence clamp during electrification.

Preferably, it also includes a linkage type conductive locking rod stop device, the linkage type conductive locking rod stop device includes a number of limit grooves evenly distributed on the outer surface of the conductive locking rod in the circumferential direction, a fixed plate arranged in the insulating box and A floating plate, a guide through hole arranged on the mounting plate, a guide rod slidably arranged in the guide through hole and connected with the floating plate, a limit stop block arranged on the floating plate and matched with the limit groove, arranged on the The guide sleeve on the insulating box and parallel to the guide rod and the linkage ejector rod slidably arranged in the guide sleeve, the limit groove is close to the second end of the conductive locking rod, and the length direction of the limit groove is the same as that of the conductive locking rod The axes are parallel to each other; the fixed plate is parallel to the floating plate, the floating plate is parallel to the axis of the conductive locking rod, the floating plate is located between the fixed plate and the conductive locking rod, and the guide rod is located between the fixed plate and the floating plate A compression spring is sleeved between them; the linkage ejector rod is parallel to the axis of the insulating cable sheath, the linkage ejector rod is perpendicular to the floating plate, the linkage ejector rod and the fixed plate are located on opposite sides of the floating plate, and the linkage ejector rod is located on opposite sides of the floating plate. The first end is located in the insulating box, the second end of the linkage ejector is located outside the insulating box, and the port of the insulating cable sheath close to the insulating box is provided with a flange plate extending outward for pushing the linkage ejector.

The linkage type conductive locking rod stop device of this solution can further improve the safety of the use of the bus clamp, and avoid the problem of electric shock accidents for personnel.

Preferably, an inner limit block and an outer limit block are provided on the outer surface of the linkage ejector, the inner limit block and the outer limit block are located on opposite sides of the guide sleeve, the inner limit block is located in the insulating box, and the outer limit block is located in the insulating box. The position block is located on the outside of the insulating box. When the outer limit block touches the end face of the guide sleeve, the first end of the linkage ejector rod touches the floating plate, and the limit stop block and the limit groove are matched and separated.

Preferably, the insulating box is provided with a connecting pipe communicating with the inner cavity of the insulating box, the insulating cable sheath is connected with the insulating box through the connecting pipe, and the insulating cable sheath and the connecting pipe are connected by threads.

Preferably, one end of the cable connecting terminal is provided with a connecting screw, the other end of the cable connecting terminal is provided with a cable connecting hole, the cable connecting terminal is connected with the external screw hole through the connecting screw, and the connecting screw is connected with the external screw hole through a screw thread.

Preferably, a plurality of V-shaped through grooves are provided on the side of the fixed chuck facing the movable chuck.

Preferably, several V-shaped through grooves are also provided on the side surface of the movable collet facing the fixed collet.

Preferably, the outer side of the insulating box is provided with an insulating cover plate for covering the operation port, and the insulating cover plate is connected with the insulating box through bolts or snaps.

The beneficial effects of the present invention are: the safety in use is good, and the problem of the potential safety hazard of electric shock to personnel during the use and electrification of the confluence clamp can be effectively avoided.

Description of drawings

FIG. 1 is a schematic structural diagram of a safe-to-use low-voltage bus clamp tool according to Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of a safe low-voltage bus clamp tool according to Embodiment 2 of the present invention.

FIG. 3 is a partial enlarged view of the source of A in FIG. 2 .

FIG. 4 is a schematic diagram of a cross-sectional structure at B-B in FIG. 3 .

In the picture:

Insulation box 1, plug-in port 1.1, operation port 1.2, connecting pipe 1.3;

Conductive connection block 2, threaded connection through hole 2.1, external screw hole 2.2

Fixed chuck 3.1, movable chuck 3.2;

Conductive locking rod 4, inner hexagon groove 4.1;

Insulation cover plate 5;

Cable connection terminal 6, connection screw 6.1, cable connection hole 6.2;

Insulated cable sheath 7, flange plate 7.1;

Low voltage cable 8;

Linkage type conductive locking rod stop device 9, limit groove 9.1, fixed plate 9.2, floating plate 9.3, limit stop block 9.4, guide rod 9.5, compression spring 9.6, guide sleeve 9.7, linkage ejector rod 9.8, inner limit Bit block 9.9, outer limit block 9.10.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

Embodiment 1: As shown in FIG. 1, a safe low-voltage confluence clamp tool includes an insulating box 1, a clamp located in the insulating box, a conductive connection block 2 fixedly arranged in the insulating box, and a conductive connection block 2. The threaded connection through hole 2.1 on the block, the conductive locking rod 4 connected with the threaded connection through hole through the thread, the external screw hole 2.2 provided on the conductive connection block, the cable connection terminal 6 connected with the external screw hole through the thread, and the The insulating box is sheathed by an insulating cable 7 connected by a thread. The conductive connection block is fixed in the insulating box. The axis of the threaded connection through hole is perpendicular to the axis of the external screw hole.

The clamp includes a movable collet 3.2 and a fixed collet 3.1 fixed on the inner wall of the insulating box. Several V-shaped through grooves are arranged on the side of the fixed chuck facing the movable chuck. A number of V-shaped through grooves are also provided on the side of the movable chuck facing the fixed chuck. The outer surface of the insulating box is provided with a plug-in port 1.1 corresponding to the clamp.

The first end of the conductive locking rod is connected with the movable chuck, and the end face of the second end of the conductive locking rod is provided with an inner hexagonal groove 4.1. Operation port 1.2 corresponding to the inner hexagon groove on the outer side of the insulating box. The outer side of the insulating box is provided with an insulating cover plate 5 for sealing the operation port, and the insulating cover plate is connected with the insulating box through bolts or snaps.

The cable connection terminals are located in the insulated cable jacket. One end of the cable connection terminal is provided with a connecting screw 6.1, and the other end of the cable connection terminal is provided with a cable connection hole 6.2. The cable connecting terminal is connected with the external screw hole through a connecting screw, and the connecting screw is connected with the external screw hole through a screw thread.

The insulating box is provided with a connecting pipe 1.3 which communicates with the inner cavity of the insulating box. The insulating cable jacket is located on the outside of the insulating box. The insulating cable sheath is connected with the insulating box through a connecting pipe, and the insulating cable sheath and the connecting pipe are connected by threads.

In this embodiment, the movable chuck, the fixed chuck, the conductive locking rod, the conductive connection block and the cable connection terminal are all made of conductive materials, such as copper, aluminum and other conductive materials.

The specific use of the safe low-voltage bus clamp tool of this embodiment is as follows:

First, remove the insulated cable sheath; then, remove the cable connection terminal.

Second, the end of the low-voltage cable 8 passes through the insulating cable sheath first, so that the insulating cable sheath is sheathed on the low-voltage cable;

Next, insert the wire core of the low-voltage cable end into the cable connection hole, and connect the cable connection terminal and the wire core of the cable end into one body by crimping, and the cable connection terminal is electrically connected to the wire core of the cable end;

Next, the cable connecting terminal is connected with the external screw hole of the conductive connecting block by screwing through the connecting screw.

Third, the insulating cable sheath and the connecting pipe of the insulating box are connected by threads, so as to isolate the wire core and cable connection terminal at the end of the low-voltage cable from the outside world, on the one hand, protect the wire core at the end of the low-voltage cable and the connector of the cable connection terminal On the other hand, it plays the role of insulation and isolation to avoid electric shock.

Fourth, the busbar of the user end is inserted into the insulating box through the insertion port of the insulating box, and the busbar extending into the insulating box is located between the fixed chuck and the movable chuck;

Next, remove the insulating cover, then use the Allen wrench to fit with the Allen groove, and turn the conductive locking rod, so that the busbar is clamped by the fixed collet and the movable collet;

Next, install the insulating cover on the insulating box.

The live parts of the safe-to-use low-voltage bus clamp tool of this embodiment are isolated by insulating parts (insulation box and insulating cable sheath), so that the use of safety can be effectively avoided. The problem of electric shock safety hazards.

Embodiment 2: The remaining structures of this embodiment refer to Embodiment 1, and the differences are:

As shown in Figures 2, 3, and 4, a safe low-voltage bus clamp tool also includes a linkage type conductive locking rod stopper 9.

The linkage type conductive locking rod stopper includes a number of limit grooves 9.1 uniformly distributed on the outer surface of the conductive locking rod in the circumferential direction, a fixed plate 9.2 and a floating plate 9.3 arranged in the insulating box, and a guide through hole arranged on the installation plate. , a guide rod 9.5 which is slidably arranged in the guide through hole and connected with the floating plate, a limit stop block 9.4 which is arranged on the floating plate and cooperates with the limit groove, and is arranged on the insulating box and is parallel to the guide rod. The guide sleeve 9.7 and the linkage ejector rod 9.8 slidably arranged in the guide sleeve.

The limit slot is close to the second end of the conductive locking rod, and the length direction of the limit slot is parallel to the axis of the conductive locking rod.

The fixed plate is parallel to the floating plate. The floating plate is parallel to the axis of the conductive locking rod. The floating plate is located between the fixed plate and the conductive locking rod. A compression spring 9.6 is sleeved on the guide rod and located between the fixed plate and the floating plate.

The material of the linkage ejector is insulating material, such as plastic. The linkage mandrel is parallel to the axis of the insulated cable sheath. The linkage mandrel is perpendicular to the floating plate. The linkage ejector rod and the fixed plate are located on opposite sides of the floating plate. The first end of the linkage ejector rod is located in the insulating box, and the second end of the linkage ejector rod is located outside the insulating box.

The port of the insulating cable sheath close to the insulating box is provided with an outwardly extending flange plate 7.1 for pushing the linkage ejector rod.

An inner limit block 9.9 and an outer limit block 9.10 are arranged on the outer surface of the linkage ejector rod. The inner limit block and the outer limit block are located on opposite sides of the guide sleeve, the inner limit block is located in the insulating box, and the outer limit block is located outside the insulating box.

As shown in FIG. 4 , when the outer limit block abuts on the end face of the guide sleeve, the first end of the linkage push rod abuts on the floating plate, and separates the limit stop block from the limit groove.

The inventor found that in the third step of Example 1, the insulating cable sheath is often not locked in place, and even the insulating cable sheath is not installed on the connecting pipe of the insulating box, so that the core and cable at the end of the low-voltage cable are The connector of the connection terminal is exposed, which not only makes the connection between the wire core of the low-voltage cable end and the cable connection terminal easy to be damaged, but more importantly, there is a potential safety hazard of electric shock. This embodiment is improved to solve this problem, effectively solve this problem.

The specific use of the safe low-voltage bus clamp tool in this embodiment refers to Embodiment 1, and the difference lies in the third step of Embodiment 1:

During the process of tightening the insulating cable sheath on the connecting pipe of the insulating box, the flange plate will abut the second end of the linkage ejector rod, push the linkage ejector rod inward, and the first end of the linkage ejector rod will touch the On the floating plate, and make the floating plate close to the fixed plate, so that the limit stop block and the limit groove are gradually separated; when the outer limit block touches the end face of the guide sleeve, the insulated cable sheath is installed in place, and The limit stop is separated from the limit groove. In this way, in the fourth step of Example 1, the operation of "using the Allen wrench to cooperate with the Allen groove to rotate the conductive locking rod" can be carried out smoothly, and the busbar is clamped in the jaw by the conductive chuck;

If the insulating cable sheath is not locked in place, or even the insulating cable sheath is not installed on the connecting pipe of the insulating box: the limit stop block and the limit groove are still in the matching state, so that the In the fourth step, the operation of "using the Allen wrench to cooperate with the Allen groove to rotate the conductive locking rod" will not be carried out smoothly, that is, the Allen wrench cannot rotate the conductive locking rod. At this time, the operator will be reminded to insulate the cable If the sheath is not locked in place, it is necessary to install the insulated cable sheath in place. You can ensure that the insulated cable sheath is installed in place on a daily basis to avoid the occurrence of the insulated cable sheath not being locked in place, or even if the insulated cable sheath is not installed to the insulation. The problem on the connection tube of the box makes the wire core at the end of the low-voltage cable and the connector of the cable connection terminal exposed, which makes the connection between the wire core at the end of the low-voltage cable and the cable connection terminal easily damaged, and there is a potential safety hazard of electric shock. The problem.

Claims (6)

1. A safe low-voltage confluence clamp tool is characterized in that it comprises an insulating box, a clamp located in the insulating box, a conductive connection block that is fixedly arranged in the insulating box, and a threaded connection that is arranged on the conductive connection block. A hole, a conductive locking rod connected with a threaded connection through hole by a thread, an external screw hole provided on the conductive connection block, a cable connection terminal connected with the external screw hole by a screw thread, and an insulating cable sheath connected with the insulating box by a screw thread , The clamp includes a movable clamp and a fixed clamp fixed on the inner wall of the insulating box, and the outer surface of the insulating box is provided with a plug-in port corresponding to the clamp, The first end of the conductive locking rod is connected with the movable chuck, the end face of the second end of the conductive locking rod is provided with an inner hexagonal groove, and the operation corresponding to the inner hexagonal groove on the outer surface of the insulating box mouth; A number of V-shaped through grooves are arranged on the side of the fixed chuck facing the movable chuck; A number of V-shaped through grooves are also provided on the side of the movable chuck facing the fixed chuck. 2. The safe-to-use low-voltage bus clamp tool according to claim 1, further comprising a linkage type conductive locking rod stopper, the linked type conductive locking rod stopper comprising a plurality of circumferentially evenly distributed The limit slot on the outer side of the conductive locking rod, the fixed plate and the floating plate arranged in the insulating box, the guide through hole arranged on the installation plate, and the guide rod slidably arranged in the guide through hole and connected with the floating plate , a limit stop block arranged on the floating plate and matched with the limit groove, a guide sleeve arranged on the insulating box and parallel to the guide rod, and a linkage ejector rod slidably arranged in the guide sleeve, the limit groove is close to the second end of the conductive locking rod, and the length direction of the limit groove is parallel to the axis of the conductive locking rod; The fixed plate is parallel to the floating plate, the floating plate is parallel to the axis of the conductive locking rod, the floating plate is located between the fixed plate and the conductive locking rod, and the guide rod is sleeved between the fixed plate and the floating plate. compressed spring; The linkage ejector rod is parallel to the axis of the insulating cable sheath, the linkage ejector rod is perpendicular to the floating plate, the linkage ejector rod and the fixed plate are located on opposite sides of the floating plate, and the first end of the linkage ejector rod is located in the insulating box, The second end of the linkage ejector rod is located outside the insulating box, The port of the insulating cable sheath close to the insulating box is provided with an outwardly extending flange plate for pushing the linkage ejector. 3. The safe low-voltage confluence clamping tool according to claim 2, wherein an inner limit block and an outer limit block are arranged on the outer surface of the linkage ejector rod, and the inner limit block and the outer limit The position blocks are located on opposite sides of the guide sleeve, the inner limit block is located in the insulating box, and the outer limit block is located outside the insulating box. When the outer limit block abuts on the end face of the guide sleeve, the first end of the linkage push rod abuts on the floating plate, and the limit stop block and the limit groove are matched and separated. 4. The safe-to-use low-voltage confluence clamp tool according to claim 1, 2 or 3, wherein the insulating box is provided with a connecting pipe that communicates with the inner cavity of the insulating box, and the insulating cable protects The sleeve is connected with the insulating box through a connecting pipe, and the insulating cable sheath and the connecting pipe are connected by a thread. 5. The safe-to-use low-voltage bus clamp tool according to claim 1, 2 or 3, wherein one end of the cable connection terminal is provided with a connecting screw, and the other end of the cable connection terminal is provided with a cable connection hole, The cable connecting terminal is connected with the external screw hole through a connecting screw, and the connecting screw is connected with the external screw hole through a screw thread. 6. The safe-to-use low-voltage bus clamp tool according to claim 1, 2 or 3, wherein the outer side of the insulating box is provided with an insulating cover plate for sealing the operation port, and the insulating cover plate passes through bolts Or the buckle is connected with the insulating box.

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