Clip for cable protection pipe of current transformer

Abstract

The utility model discloses a current transformer cable protection pipe clamp, and belongs to the field of pipeline fixing clamps. The cable protection pipe clamp comprises a junction box, a protection pipe and pipeline limiting shells, the pipeline limiting shells are of symmetrical structures with the same shape, the protection pipe is clamped between the two symmetrical pipeline limiting shells, each pipeline limiting shell is in the shape of an arch-shaped plate with side wings on the two sides, and the arch-shaped plates are matched with the protection pipe in shape. Fixing holes are formed in the side wings, a fixing part is arranged at the end, facing the junction box, of the pipeline limiting shell and is of an L-shaped bevel structure, the bevel structure makes contact with the junction box and is matched with the contact part of the junction box in shape, and the fixing part is fixedly connected with the junction box. According to the utility model, the relative vibration between the protection tube and the junction box is effectively reduced, the maintenance time is long after installation, frequent overhaul and maintenance are not needed, and the inspection and maintenance time of the equipment by workers is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline fixing clamps, and specifically relates to a current transformer cable protection pipe clamp. Background Art

[0002] Current transformer is an electrical device that converts large current on the primary side into small current on the secondary side for measurement. It plays the role of current conversion and electrical isolation. The primary side of the current transformer is connected to the primary electrical system, and the secondary side is connected to measuring instruments, relay protection and other equipment through control cables.

[0003] However, since the generator equipment with current transformer installed will generate large vibration during operation, usually a bakelite frame and other components are installed between the junction box and the cable protection tube for fixing. However, after long-term operation, the bakelite frame will inevitably be damaged. Without the restriction of the protection frame, the cable protection tube will not only fail to protect the cable, but also wear and damage the cable, which may cause the secondary cable to be grounded or open, resulting in serious consequences such as incorrect action of the generator-transformer protection and inaccurate measurement of the meter circuit.

[0004] Because the bakelite frame is set inside the junction box, it is difficult to replace the bakelite after it is damaged or broken. Therefore, in the actual work site, most of the maintenance is carried out by additionally fixing the cable protection tube to reduce its vibration. Usually, two adjacent cable protection tubes are bundled and fixed to reduce their vibration. The methods used include wrapping with insulating tape, tying with nylon ties, and tying with iron wire. Although there is a certain vibration reduction effect, the bundled ties and insulating tapes are easy to loosen under the vibration of the pipeline, and frequent reinforcement is required. Tying with iron wire can effectively extend the service life, but because the binding is too tight, it is easy to cause the cable protection tube to bend.

[0005] In addition to the above problems, the bundling and fixing method still cannot suppress the vibration generated by the contact part between the protection tube and the bakelite. If it continues for a long time, it will still lead to the complete breakage of the bakelite frame and the complete detachment of the joint part of the protection tube.

[0006] Therefore, a new design is needed that can provide long-term vibration reduction for the connection between the cable protection tube and the bakelite frame of the junction box. Utility Model Content

[0007] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a current transformer cable protection pipe clamp.

[0008] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0009] A current transformer cable protection pipe clamp comprises a junction box and a protection pipe, and also comprises a pipe limiting shell, wherein the pipe limiting shell is a symmetrical structure with the same shape, and the protection pipe is clamped between two symmetrical pipe limiting shells, and the shape of the pipe limiting shell is an arched plate with side wings on both sides, and the arched plate matches the shape of the protection pipe, and the side wings are provided with fixing holes, and the pipe limiting shell is provided with a fixing part at one end facing the junction box, and the fixing part is an L-shaped angled structure, and the angled structure contacts the junction box and the shape of the angled structure and the contact part of the junction box matches, and the fixing part is fixedly connected to the junction box.

[0010] The fixing holes on the side wings of the two pipeline limit shells are at the same position, and the symmetrically arranged pipeline limit shells are fixed to each other through the fixing holes.

[0011] The pipeline limiting shell is fixed by bolts.

[0012] The fixing part is provided with a fixing hole, and the fixing part is connected to the junction box through bolts.

[0013] The fixing hole is an open structure facing one side of the junction box.

[0014] The positions of the fixing holes match the positions of the bolts for assembling the junction box.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model is designed with a clamp for the connection part between the current transformer junction box and the cable protection tube. This solution can be installed based on the already installed equipment and has a high degree of adaptability. By adjusting the shape of the clamp fixing part, it can be used on connection parts of various shapes to connect the protection tube and the junction box as a whole and reinforce them. The relative vibration between the two is effectively reduced. Even if the bakelite frame set between the protection tube and the junction box is damaged, the protection tube will no longer vibrate and wear the internal cable. In addition, the maintenance time after installation is long, and frequent inspection and maintenance are not required, which greatly saves the staff's inspection and maintenance time for this part of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] In the figure: 1. Junction box; 2. Protective tube; 3. Pipe limit shell; 4. Fixed part; 5. Arch plate structure; 6. Bolts. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with specific embodiments.

[0020] like Figure 1 As shown, the main body of the utility model is a symmetrically arranged pipe limit shell 3, which is arranged at the connecting part of the protection tube 2 outside the cable and the junction box 1 for wiring the cable. The pipe limit shell 3 clamps the protection tube 2 in the middle and is fixed to the junction box 1.

[0021] The specific structure of the pipe limiting shell 3 is an arched plate structure 5 with side wings, and a fixed part 4 with an L-shaped angle structure is provided at one end of the pipe limiting shell 3 facing the junction box 1, and the fixed part 4 is connected to the arched plate structure 5 by welding.

[0022] The arched part of the arched plate structure 5 is designed according to the external structure of the protective tube 2. In the present embodiment, the protective tube 2 used is an ordinary circular tube structure, so the arched plate structure 5 is an arched structure with a semicircular arc. The arched plate structure 5 is slightly larger than the outer diameter of the protective tube 2. After the two symmetrical pipe limit shells 3 are closed, the protective tube 2 can be clamped between the arched plate structures 5. The inner side of the arched plate structure 5 is in close contact with the protective tube 2, and it does not form a circular tube-shaped shell covering the outside of the protective tube 2. There is no gap between the arched plate structure 5 and the protective tube 2.

[0023] The two arched plate structures 5 are fixed to each other through side wings provided on both sides. The side wings are provided with corresponding fixing holes. Bolts are passed through the fixing holes of the two arched plate structures 5 for fixing until the arched plate structures 5 firmly clamp the protective tube 2 in the middle.

[0024] Because the main function of the arch plate structure 5 is to clamp and fix with the protection tube 2, the shape of the arch plate structure 5 is not necessarily a semicircular structure, and can also be an arc-shaped arch plate slightly larger than the outer diameter of the protection tube 2, and the side wing length of the arch plate structure 5 is extended so that the arch plate structure 5 can be fixed to each other and clamp the protection tube 2. The same is true for protection tubes 2 of other shapes and structures. As long as the arch plate structure 5 can fit the protection tube 2 and clamp it, the vibration reduction effect can be achieved. Therefore, the shape of the arch plate structure 5 is not specifically limited, and needs to be designed accordingly according to the shape of the protection tube 2 actually clamped.

[0025] The junction box 1 in this embodiment adopts a relatively standard square shell and is assembled and fixed by bolts. The fixing part 4 of the pipeline limit shell 3 is also designed according to the external structure of the junction box 1. A fixing hole is also opened on the fixing part 4. The fixing hole opened on the fixing part 4 is not a round hole structure, but an open structure facing one side of the junction box 1, such as Figure 1 as shown in .

[0026] Because there may be a protruding structure between the junction box 1 and the protective tube 2, or the shape of the joint part of the protective tube 2 is different from the whole, the fixing part 4 cannot be accurately installed to the designated part when the pipe limit shell 3 is installed. The structure of the open fixing hole allows the pipe limit shell 3 to move to a certain extent along the direction of the protective tube 2. The fixing hole only needs to be aligned with the assembly bolt of the junction box 1 in the vertical direction of the protective tube 2 for installation, making the installation conditions more relaxed.

[0027] The utility model is designed according to the actual situation of the equipment, and can also be adjusted in real time according to the characteristics and structure of each equipment during actual use, effectively reducing the relative vibration generated between the cable protection tube and the junction box 1, and after installation, the maintenance time does not require frequent maintenance and reinforcement, saving a lot of manpower and maintenance time, ensuring the safe and stable operation of the unit.

Claims

1. A current transformer cable protection tube clamp, comprising a junction box and a protection tube, characterized in that: It also includes a pipe limiting shell, which is a symmetrical structure with the same shape. The protective tube is clamped between two symmetrical pipe limiting shells. The shape of the pipe limiting shell is an arched plate with side wings on both sides. The arched plate matches the shape of the protective tube. The side wings are provided with fixing holes. The end of the pipe limiting shell facing the junction box is provided with a fixing part, which is an L-shaped angled structure. The angled structure contacts the junction box and the shape of the angled structure matches the contact part of the junction box. The fixing part is fixedly connected to the junction box.

2. A current transformer cable protection pipe clamp according to claim 1, characterized in that: The fixing holes opened on the side wings of the two pipeline limiting shells are at the same position, and the symmetrically arranged pipeline limiting shells are fixed to each other through the fixing holes.

3. The current transformer cable protection pipe clamp according to claim 1, characterized in that: The pipeline limiting shell is fixed by bolts.

4. The current transformer cable protection pipe clamp according to claim 1, characterized in that: The fixing part is provided with a fixing hole, and the fixing part is connected to the junction box through bolts.

5. A current transformer cable protection pipe clamp according to claim 4, characterized in that: The fixing hole is an open structure facing one side of the junction box.

6. A current transformer cable protection pipe clamp according to claim 4, characterized in that: The positions of the fixing holes match the positions of the bolts for assembling the junction box.

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