CN-121840263-B - Polyvinyl chloride cable

Abstract

The invention relates to the technical field of cables, in particular to a polyvinyl chloride cable which comprises cable main bodies, wherein the number of the cable main bodies is two, the two cable main bodies are connected through a wiring unit, a protection unit is further arranged between the two cable main bodies, and the protection unit comprises an inner layer sealing mechanism, a middle buffer mechanism and an outer layer protection mechanism. According to the invention, by designing the triple protection structure with the cooperation of inner layer sealing, middle buffering and outer layer protection, airtight heat preservation or ventilation and heat dissipation can be automatically completed according to the ambient temperature, the material short plates with poor heat resistance and easy embrittlement at low temperature are accurately adapted, meanwhile, the protection units adopt split structures which are symmetrical up and down, the limitation of permanent sealing after solidification of the traditional glue filling protection is broken, no colloid is destroyed during maintenance, the protection parts can be reused, and the maintenance operation difficulty and cost are greatly reduced.

Inventors

• CAO YANGTIAN
• WANG YUZE

Assignees

• 吉林省鑫联达电缆制造有限公司

Dates

Publication Date

20260512

Application Date

20260316

Claims (10)

1. 1. The polyvinyl chloride cable comprises cable bodies, wherein the number of the cable bodies is two, and the two cable bodies are connected through a wiring unit; the protection unit comprises an inner layer sealing mechanism, a middle buffer mechanism and an outer layer protection mechanism; the inner layer sealing mechanism comprises a sealing cylinder body, the sealing cylinder body is fixed on the cable main body through a locking piece, and a ventilation assembly is arranged on the sealing cylinder body; The outer layer protection mechanism comprises two positioning cover cylinders and two protection inner cylinders, wherein the two positioning cover cylinders and the two protection inner cylinders are horizontally and symmetrically distributed at two sides of the butt joint part of the cable main body, the inner sides of the protection inner cylinders and the positioning cover cylinders are horizontally and slidably contacted, the two positioning cover cylinders are connected through a connecting component, and a driving component for driving the protection inner cylinders to horizontally move is arranged on the connecting component; when the environment temperature is higher, the driving component drives the protection inner cylinder to separate to form a ventilation gap, and meanwhile, the ventilation component is started to accelerate the discharge of heat generated during cable operation.
2. 2. The polyvinyl chloride cable according to claim 1, wherein the sealing cylinder body is composed of two sealing half cylinders which are symmetrical up and down, the positioning cover cylinder is composed of two positioning half cylinders which are symmetrical up and down, and the protection inner cylinder is composed of two protection half cylinders which are symmetrical up and down; the side wall of the sealing half cylinder is provided with a positioning convex edge, the opposite sides of the two positioning half cylinders which are horizontally symmetrical are provided with positioning grooves, the inside of the protecting half cylinder is provided with a glue injection cavity, the protecting half cylinder is provided with a glue injection port communicated with the glue injection cavity, glue liquid is filled into the glue injection cavity through the glue injection port, and the positioning half cylinder is provided with a position avoiding groove for avoiding the glue injection port.
3. 3. A polyvinyl chloride cable according to claim 2, wherein the sealing half-drum opposing faces, the positioning half-drum opposing faces and the shielding half-drum opposing faces are each provided with sealing gaskets.
4. 4. The polyvinyl chloride cable according to claim 2, wherein the number of the middle buffer mechanisms is two, the two middle buffer mechanisms are horizontally and symmetrically distributed on two sides of the butt joint of the cable main body, each middle buffer mechanism comprises two rubber semi-rings which are vertically symmetrical, and limiting grooves for installing the rubber semi-rings are formed in the inner wall of each protection semi-cylinder.
5. 5. The polyvinyl chloride cable according to claim 1, wherein the ventilation assembly comprises a ventilation opening and a control member for controlling the opening and closing states of the ventilation opening, the ventilation opening is formed in the side wall of the sealing cylinder, the control member is installed in the sealing cylinder, and a filter screen is arranged in the ventilation opening.
6. 6. The polyvinyl chloride cable according to claim 2, wherein the connecting assembly comprises two connecting semi-rings which are vertically symmetrical, the two connecting semi-rings are detachably connected, a plurality of strip-shaped through holes are uniformly formed in the arc-shaped side walls of the connecting semi-rings, semi-ring grooves are formed in two sides of the connecting semi-rings, which are distributed in the width direction, of the connecting semi-rings, inserting rods are arranged on the horizontal side walls of the semi-ring grooves, and insertion holes are formed in opposite ends of the horizontally symmetrical positioning semi-cylinders.
7. 7. The polyvinyl chloride cable according to claim 6, wherein the driving assembly comprises a plurality of sliding grooves uniformly formed on the inner side of the connecting semi-ring, the sliding grooves and the strip-shaped through holes are distributed at intervals, a sliding block is slidably mounted in the sliding grooves, and a driving plate made of bimetallic strips is connected between the sliding block and the sliding grooves; The two horizontally symmetrical protection half cylinders are provided with mounting convex edges on opposite sides, a reset spring is connected between the mounting convex edges and the sliding grooves, a butt joint rod is arranged on one side, close to the protection half cylinder, of the sliding block which is positioned right above and below the sliding block, and a butt joint hole corresponding to the butt joint rod is formed in the protection half cylinder.
8. 8. The polyvinyl chloride cable according to claim 5, wherein the control member comprises a valve plate horizontally mounted on the inner wall of the sealing cylinder and a moving plate fixedly mounted on the inner wall of the sealing cylinder, the moving plate is made of a bimetal sheet, a communication hole is formed in the valve plate, and the valve plate is fixedly connected with the moving plate.
9. 9. The polyvinyl chloride cable of claim 2, wherein the locking member is an internal thread sleeve, the inside of the internal thread sleeve is in a conical structure, the end part of the sealing cylinder is in a conical structure, the number of the internal thread sleeves is two and corresponds to two ends of the sealing cylinder respectively, the internal thread sleeve is in threaded connection with the cable main body, and when the internal thread sleeve is screwed on the cable main body, the inner wall of the internal thread sleeve is attached to the end part of the sealing cylinder.
10. 10. The polyvinyl chloride cable according to claim 4, wherein opposite sides of the limit grooves on the two horizontally symmetrically distributed protective half drums are mutually communicated, an ePTFE protective film is arranged between the two horizontally symmetrically distributed rubber half drums, and the upper and lower symmetrical protective films form an annular structure.

Description

Polyvinyl chloride cable Technical Field The invention relates to the technical field of cables, in particular to a polyvinyl chloride cable. Background The polyvinyl chloride cable is a cable device for signal transmission, the insulating material is polyvinyl chloride, the conductor material is mainly copper and aluminum, and the cable device is widely applied in the field of construction. In actual operation, it is often necessary to connect and use multiple cables, the polyvinyl chloride has poor heat resistance, and is easy to harden, become brittle and drastically reduce the bending/impact resistance in low temperature environment, and the connection part is a weaker and easily invalid part in the whole cable, so that reinforcement protection is necessary. Common protection mode has electrician's sticky tape winding connection, pyrocondensation pipe cladding connection, encapsulating terminal box connection etc.. The glue-filled junction box plays a role in protecting through a completely sealed, insulating and shockproof solid protection layer formed by the double-component resin filled in the sealing box after the glue solution is solidified, has superior mechanical and electrical protection performance compared with other protection modes, and is suitable for connection protection of cables in severe environments or key positions. But once cured by glue filling, the joint is permanently sealed. If the connector is to be overhauled or replaced, the colloid must be thoroughly destroyed, the operation is very difficult, and the whole junction box is usually required to be replaced and the connector is usually required to be manufactured again, so that the maintenance cost is high. In addition, the colloid has poor thermal conductivity, can play good heat preservation protection effect under low temperature environment in winter, but under high temperature environment in summer, the heat of cable junction can't be discharged, and heat continuously accumulates, accelerates ageing, softening, the thermal deformation of cable, leads to insulating properties to descend, and electric leakage, puncture risk rise, bring a series of potential safety hazards. Disclosure of Invention In view of the above, the present invention aims to provide a polyvinyl chloride cable, which solves the technical problems existing in the prior art, and includes two cable bodies, wherein the two cable bodies are connected through a wiring unit, and a protection unit is further disposed between the two cable bodies. The protection unit comprises an inner layer sealing mechanism, a middle buffer mechanism and an outer layer protection mechanism. The inner layer sealing mechanism comprises a sealing cylinder body, the sealing cylinder body is fixed on the cable main body through a locking piece, and a ventilation assembly is arranged on the sealing cylinder body. The outer protection mechanism comprises a positioning cover cylinder and a protection inner cylinder, wherein the positioning cover cylinder and the protection inner cylinder are both provided with two parts, and are horizontally and symmetrically distributed on two sides of the butt joint part of the cable main body, the protection inner cylinder is horizontally and slidingly contacted with the inner side of the positioning cover cylinder, the two positioning cover cylinders are connected through a connecting assembly, and a driving assembly for driving the protection inner cylinder to horizontally move is arranged on the connecting assembly. Preferably, the sealing cylinder body is composed of two sealing half cylinders which are vertically symmetrical, the positioning cover cylinder is composed of two positioning half cylinders which are vertically symmetrical, and the protection inner cylinder is composed of two protection half cylinders which are vertically symmetrical. The side wall of the sealing half cylinder is provided with a positioning convex edge, the opposite sides of the two positioning half cylinders which are horizontally symmetrical are provided with positioning grooves, the inside of the protecting half cylinder is provided with a glue injection cavity, the protecting half cylinder is provided with a glue injection port communicated with the glue injection cavity, glue liquid is filled into the glue injection cavity through the glue injection port, and the positioning half cylinder is provided with a position avoiding groove for avoiding the glue injection port. Preferably, the sealing gaskets are arranged on the opposite surfaces of the two sealing half cylinders, the opposite surfaces of the two positioning half cylinders and the opposite surfaces of the two protecting half cylinders. Preferably, the number of the middle buffer mechanisms is two, the two middle buffer mechanisms are horizontally and symmetrically distributed at two sides of the butt joint part of the cable main body, each middle buffer mechanism comprises two rubber semi-rings which ar