Protective device for power cable

Abstract

The utility model relates to the technical field of cables, and discloses a protection device for a power cable, which comprises a cable junction box, a heating box and a motor are fixedly mounted at the top of the cable junction box, a threaded rod is rotatably mounted at the top of the cable junction box, and a heat supply assembly is further mounted at the top of the cable junction box. The heat supply assembly comprises an installation cylinder, the installation cylinder is fixedly installed on the top of the cable junction box, and a piston is installed in the installation cylinder. The motor can drive the piston to vertically move upwards, the piston extrudes hot air in the mounting cylinder, the hot air penetrates through the telescopic hose and enters the cable junction box, heat is supplied to the cable junction box, then the motor reversely runs to drive the piston to vertically move downwards, and under the action of atmospheric pressure, the hot air in the heating box enters the mounting cylinder to heat the cable junction box. And then the motor drives the piston to vertically move upwards, and the cycle is repeated, so that heat can be continuously fed into the cable junction box, and the dryness in the cable junction box can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field more particularly to a kind of protective devices for power cable. BACKGROUND

[0002] The cable terminal box is a device for connecting and protecting power cables, mainly used in power systems, and is usually composed of a box body, terminal, diode, connecting wire and connector.

[0003] When the environmental humidity is large, the moisture in the humid air will invade the inside of the cable terminal box, increase the capacitance and resistance of the cable, cause the signal transmission quality to decline, and the moisture and oxygen in the humid environment will cause the metal conductor and connecting piece in the cable terminal box to corrode, weaken its conductivity, and eventually may cause the cable to break or contact poorly. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a protective device for power cable to solve the problems existing in the above background art.

[0005] The utility model provides the following technical scheme: a protective device for power cable, comprising a cable terminal box, a heating box and a motor are fixedly installed on the top of the cable terminal box, a threaded rod is rotatably installed on the top of the cable terminal box, and a heat delivery assembly is also installed on the top of the cable terminal box.

[0006] The heat delivery assembly comprises a mounting cylinder, the mounting cylinder is fixedly installed on the top of the cable terminal box, a piston is installed inside the mounting cylinder, the heating box is used to provide hot air inside the mounting cylinder, the piston is used to deliver the hot air inside the mounting cylinder to the inside of the cable terminal box, and the motor is used to provide power for the movement of the piston.

[0007] Preferably, an electric heating plate is fixedly installed inside the heating box, an air inlet hole is formed through the surface of the heating box, a flow guide pipe is provided on the top of the heating box, one end of the flow guide pipe is fixedly connected to the top of the heating box, and the other end of the flow guide pipe is fixedly connected to the top of the mounting cylinder.

[0008] Preferably, the surface of the piston and the inner wall of the mounting cylinder form a sealed sliding guide fit, an extension nozzle is fixedly connected to the bottom of the piston, the extension nozzle passes through the bottom of the mounting cylinder and extends downward, the bottom of the extension nozzle and the top of the cable terminal box are fixedly connected and connected through a flexible hose, and a receiving shell is fixedly connected to the top of the inner cavity of the mounting cylinder.

[0009] Preferably, the receiving shell is internally provided with a first blocking ball and a first spring, one end of the first spring is fixedly connected with the bottom of the inner cavity of the receiving shell, the other end of the first spring is fixedly connected with the bottom of the first blocking ball, a through hole is formed in the bottom of the receiving shell, and the first blocking ball is used for blocking the other end of the flow guide pipe.

[0010] Preferably, the extension nozzle is internally fixedly connected with a positioning plate and a through hole plate, a communication hole is formed in the center of the positioning plate, a second blocking ball and a second spring are arranged between the positioning plate and the through hole plate, one end of the second spring is fixedly connected with the top of the through hole plate, the other end of the second spring is fixedly connected with the bottom of the second blocking ball, and the second blocking ball is used for blocking the communication hole.

[0011] Preferably, the top of the piston is fixedly connected with a U-shaped frame, the U-shaped frame passes through the top of the mounting cylinder, the bottom of the U-shaped frame is fixedly connected with a moving plate, the moving plate is screw-connected to the surface of a threaded rod, and a power transmission piece is arranged between the output end of the motor and the threaded rod.

[0012] The technical effects and advantages of the utility model are as follows:

[0013] When the environmental humidity is large, the motor can drive the piston to move vertically upward, the piston extrudes the hot air in the mounting cylinder, the hot air passes through the flexible hose and enters the cable junction box, heat is sent into the cable junction box, then the motor reversely operates to drive the piston to move vertically downward, under the action of atmospheric pressure, the hot air in the heating box enters the mounting cylinder, then the motor drives the piston to move vertically upward again, and the cycle is repeated, so that the cable junction box can be continuously sent with heat, and thus the dryness of the cable junction box can be ensured, and corrosion and electrical performance decline caused by too large humidity can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model.

[0015] Figure 2 It is a whole structure schematic view of another view of the utility model.

[0016] Figure 3 It is a partial structure sectional view of the utility model.

[0017] Figure 4 It is a piston structure schematic view of the utility model.

[0018] Figure 5 It is an enlarged view of structure A in the utility model Figure 3

[0019] ​The reference signs are: 1, cable terminal box; 2, heating box; 21, electric heating plate; 22, air inlet hole; 23, flow guide pipe; 3, heat delivery assembly; 31, mounting cylinder; 32, piston; 321, extension nozzle; 322, U-shaped frame; 323, moving plate; 33, receiving shell; 331, through hole; 34, first blocking ball; 341, first spring; 35, flexible hose; 36, positioning plate; 37, through hole plate; 38, second blocking ball; 381, second spring; 4, motor; 41, power transmission member; 5, threaded rod. DETAILED DESCRIPTION

[0020] The technical solutions in the utility model will be described clearly and completely in combination with the drawings in the utility model, and the forms of the structures described in the following embodiments are only examples, and the protective device for power cable involved in the utility model is not limited to the structures described in the following embodiments, and all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] The utility model provides a kind of protective device for power cable, including cable terminal box 1, cable terminal box 1 top fixed installation has heating box 2 and motor 4, cable terminal box 1 top rotatably installs threaded rod 5, cable terminal box 1 top is also installed heat delivery assembly 3.

[0022] Heat delivery assembly 3 includes mounting cylinder 31, and mounting cylinder 31 is fixedly installed on the top of cable terminal box 1, piston 32 is installed in mounting cylinder 31, heating box 2 is used to provide hot air in mounting cylinder 31, piston 32 is used to deliver hot air in mounting cylinder 31 to the inside of cable terminal box 1, and motor 4 is used to provide power for the movement of piston 32.

[0023] Further, electric heating plate 21 is fixedly installed in heating box 2, air inlet hole 22 is formed through the surface of heating box 2, flow guide pipe 23 is arranged on the top of heating box 2, one end of flow guide pipe 23 is fixedly connected with the top of heating box 2, and the other end of flow guide pipe 23 is fixedly connected with the top of mounting cylinder 31, air in external environment can pass through air inlet hole 22 and enter the inside of heating box 2, and electric heating plate 21 realizes heating of air.

[0024] Further, the piston 32 surface and the installation cylinder 31 inner wall constitute sealing sliding guide cooperation, the piston 32 bottom fixedly connected with the extension nozzle 321, the extension nozzle 321 bottom passes through the installation cylinder 31 bottom and extends downward, the extension nozzle 321 bottom and the cable terminal box 1 top are fixedly connected with the flexible hose 35 and are connected, the installation cylinder 31 inner chamber top fixedly connected with the receiving shell 33, the hot air in the heating box 2 can pass through the flow guide pipe 23 and enter the installation cylinder 31 inside, under the compression of the piston 32, the hot air in the installation cylinder 31 can pass through the flexible hose 35 and enter the cable terminal box 1.

[0025] Further, the receiving shell 33 inside is provided with a first blocking ball 34 and a first spring 341, the first spring 341 one end and the receiving shell 33 inner chamber bottom fixedly connected, the first spring 341 other end and the first blocking ball 34 bottom fixedly connected, the receiving shell 33 bottom is provided with the through hole 331, the first blocking ball 34 is used for blocking the flow guide pipe 23 other end, the first spring 341 elastic force can drive the first blocking ball 34 towards the direction close to the flow guide pipe 23 movement.

[0026] Further, the extension nozzle 321 inside fixedly connected with the positioning plate 36 and the through hole plate 37, the positioning plate 36 center is provided with the communication hole, the positioning plate 36 and the through hole plate 37 are provided with the second blocking ball 38 and the second spring 381, the second spring 381 one end and the through hole plate 37 top fixedly connected, the second spring 381 other end and the second blocking ball 38 bottom fixedly connected, the second blocking ball 38 is used for blocking the communication hole, the second spring 381 elastic force can drive the second blocking ball 38 towards the direction close to the positioning plate 36 movement.

[0027] Further, the piston 32 top fixedly connected with the U-shaped frame 322, the U-shaped frame 322 passes through the installation cylinder 31 top, the U-shaped frame 322 bottom fixedly connected with the movement plate 323, the movement plate 323 is screwed on the surface of the threaded rod 5, the motor 4 output and the threaded rod 5 between the power transmission member 41, the power transmission member 41 is used for converting the output power of the motor 4 into the rotation of the threaded rod 5, preferably, the power transmission member 41 is a belt drive structure, the rotation of the threaded rod 5 can drag the movement plate 323 along the vertical direction movement, so as to realize the piston 32 ascending and descending.

[0028] The utility model discloses a working principle: when the environment humidity is bigger, motor 4 opens, and motor 4 drives screw rod 5 around the own axis rotation through power transmission piece 41, and screw rod 5 rotates and drives piston 32 vertical synchronous movement upwards through moving plate 323 and U-shaped frame 322, and piston 32 extrudes the hot air in the installation cylinder 31, and the hot air enters the extension mouth 321, under the action of gas pressure, no. 2 stop ball 38 moves towards the direction close to through -hole plate 37, and the second spring 381 contracts under the extrusion of no. 2 stop ball 38, and the elasticity increases, and no. 2 stop ball 38 removes the stop of the communicating hole, and the hot air passes through the communicating hole and enters the cable terminal box 1 inside by the flexible hose 35, and sends the heat into the cable terminal box 1, to realize the drying to the cable terminal box 1 inside.

[0029] Afterwards, motor 4 reverses operation, and screw rod 5 reverses rotation around the own axis, and similarly, piston 32 moves vertically downwards and returns to the initial position, at this time, the installation cylinder 31 inside is under the negative pressure state, under the action of atmospheric pressure, the hot air in heating box 2 enters the draft tube 23, and no. 1 stop ball 34 moves downwards under the action of gas pressure, and the first spring 341 contracts under the extrusion of no. 1 stop ball 34, and the elasticity increases, and no. 1 stop ball 34 removes the stop of the other end of draft tube 23, and the hot air in heating box 2 enters the installation cylinder 31, afterwards, motor 4 drives piston 32 to move vertically upwards again, and the cable terminal box 1 is continuously sent into the heat in this way.

[0030] Finally, the following points should be explained: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0031] Secondly: the utility model discloses an embodiment of the drawings, only relates to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0032] Finally: the above-mentioned only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A protection arrangement for a power cable, comprising a cable terminal box (1), characterized in that The cable terminal box (1) top fixed installation has heating box (2) and motor (4), the cable terminal box (1) top rotary installation has screw rod (5), the cable terminal box (1) top still installs heat delivery assembly (3); The heat delivery assembly (3) includes an installation cylinder (31), which is fixedly installed on the top of the cable terminal box (1), and a piston (32) is installed inside the installation cylinder (31). The heating box (2) is used to provide hot air inside the installation cylinder (31), and the piston (32) is used to deliver the hot air inside the installation cylinder (31) to the inside of the cable terminal box (1). The motor (4) is used to power the movement of the piston (32).

2. A protective device for power cables according to claim 1, characterised in that The heating box (2) is fixedly installed with an electric heating plate (21) inside, and an air inlet hole (22) is formed through the surface of the heating box (2). The heating box (2) is provided with a flow guide pipe (23) on the top, one end of which is fixedly connected with the top of the heating box (2), and the other end of which is fixedly connected with the top of the installation cylinder (31).

3. A protective device for power cables according to claim 2, characterised in that The surface of the piston (32) and the inner wall of the installation cylinder (31) form a sealed sliding guide fit, the bottom of the piston (32) is fixedly connected with an extension nozzle (321), the bottom of the extension nozzle (321) passes through the bottom of the installation cylinder (31) and extends downward, the bottom of the extension nozzle (321) and the top of the cable terminal box (1) are fixedly connected through a flexible hose (35), and the top of the installation cylinder (31) is fixedly connected with a receiving shell (33).

4. A protective device for power cables according to claim 3, characterised in that The receiving shell (33) is provided with a first blocking ball (34) and a first spring (341) inside, one end of the first spring (341) is fixedly connected with the inner cavity bottom of the receiving shell (33), the other end of the first spring (341) is fixedly connected with the bottom of the first blocking ball (34), and a through hole (331) is formed through the bottom of the receiving shell (33). The first blocking ball (34) is used to block the other end of the flow guide pipe (23).

5. A protective device for power cables according to claim 3, characterised in that The inside of the extension nozzle (321) is fixedly connected with a positioning plate (36) and a through hole plate (37), a communication hole is formed through the center of the positioning plate (36), and a second blocking ball (38) and a second spring (381) are arranged between the positioning plate (36) and the through hole plate (37). One end of the second spring (381) is fixedly connected with the top of the through hole plate (37), the other end of the second spring (381) is fixedly connected with the bottom of the second blocking ball (38), and the second blocking ball (38) is used to block the communication hole.

6. A protective device for power cables according to claim 1, characterized in that The top of the piston (32) is fixedly connected with a U-shaped frame (322), the U-shaped frame (322) passes through the top of the installation cylinder (31), the bottom of the U-shaped frame (322) is fixedly connected with a movement plate (323), the movement plate (323) is screwedly connected to the surface of the screw rod (5), and a power transmission piece (41) is arranged between the output end of the motor (4) and the screw rod (5).

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