CN111029057A

CN111029057A - Manufacturing method of cable protection sleeve

Info

Publication number: CN111029057A
Application number: CN201911289572.5A
Authority: CN
Inventors: 宋朝云
Original assignee: Guangdong Yuetong Industry Co Ltd
Current assignee: Guangdong Yuetong Industry Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-04-17

Abstract

The invention relates to the field of processing of cable protective sleeves, and particularly discloses a method for manufacturing a cable protective sleeve, wherein a winding machine is used for winding a plurality of layers of middle straight-pull winding layers and inner wall glass fiber felt layers of a sleeve to form the thickness, and the inner wall of the sleeve after winding is coated on a mold core tubular column through glass fiber felt for treatment; after soaking and accomplish and past the sleeve pipe semi-manufactured goods of hanging wall, continue to keep the state of flare-outing, can be smooth in order to ensure the surface effect who comes out on the intraductal wall of cover, through the further cladding sleeve pipe of glass fiber felt, form outer wall glass fiber felt layer to ensure that the whole more shaping effect of sleeve pipe is better, add man-hour moreover, the sleeve pipe is shaping more easily, is favorable to the assurance of structure and appearance quality.

Description

Manufacturing method of cable protection sleeve

Technical Field

The invention relates to the field of processing of cable protective sleeves, in particular to a manufacturing method of a cable protective sleeve.

Background

The cable sleeve is a novel sleeve material which is popularized and used in power engineering, is a pipeline for protecting wires and cable wiring in electrical installation, and allows the wires and the cables to penetrate and be replaced.

The types of cable bushings known are mainly the following:

1. power pipeline systems (PVC-C high-voltage power pipes, CFRP carbon threaded pipes, HDPE communication cable sheath pipes, PVC-U buried communication cable pipes, CPVC high-voltage power cable sheath pipes and MPP high-voltage power cable sheath pipes);

2. communication pipe system (HDPE, PVC double-wall corrugated pipe, plum blossom pipe, three-color optical cable pipe, PE passageway top pipe, silicon core pipe, PVC square hole grid pipe)

3. Single wire sheath tube: non-magnetic materials are used to reduce heating. The insulating structure of the single wire sheath tube is divided into an air cavity and an air cavity short circuit. The air cavity sleeve is used for 10 kilovolts and below, an air cavity is arranged between the conductor and the porcelain sleeve to serve as auxiliary insulation, sleeve capacitance can be reduced, and corona voltage and sliding flash voltage of the sleeve are improved. When the voltage level is high (20-30 kilovolts), corona occurs inside the air cavity to disable the function, and an air cavity short circuit structure is adopted. The inner wall of the porcelain bushing is coated with semiconductor glaze, and the spring piece is communicated with the conductor to short circuit the air cavity so as to eliminate internal corona.

4. Composite wire sheath pipe: oil or gas is used as an insulating medium, and the insulating medium is generally made into a transformer bushing or a breaker bushing and is commonly used for the voltage class below 35 kilovolts. The inner cavity between the conductor of the composite wire sheath tube and the porcelain sleeve is filled with transformer oil, and the radial insulation effect is achieved. When the voltage exceeds 35 kilovolts, an insulating tube or a cable is sleeved on the conductor to strengthen the insulation. The conductor structure of the composite wire sheath tube has two types of cable penetrating type and guide rod type. The cable-through type utilizes the lead-out cable of the transformer to directly pass through the sleeve, and is convenient to install. When the working current is more than 600 amperes, the installation of the cable penetrating type structure is difficult, and a guide rod type structure is generally adopted.

5. Capacitive wire sheath pipe: the capacitor comprises a capacitor core, a porcelain bushing, a metal accessory and a conductor. When the capacitor core of the capacitor wire sheath tube is made of gummed paper, the mechanical strength is high, the capacitor wire sheath tube can be installed at any angle, the moisture resistance is good, the structure and the maintenance are simple, a sleeve does not need to be put, and the lower end of the core can be turned into a short tail type to reduce the size of the core. The defect is that the requirement of the absolute grade material and the process is higher when the voltage is high, and the air gap is not easy to eliminate in the core, so that the partial discharge voltage is low.

6. Stainless steel protecting sleeve: the stainless steel protective sleeve is made of 304 stainless steel or 301 stainless steel, is used as a wire and cable protective sleeve for wires, cables and automatic instrument signals, and has the specification of 3mm to 150 mm. The ultra-small caliber stainless steel protective sleeve (the inner diameter is 3mm-25mm) is mainly used for protecting a sensing circuit of a precision optical ruler and an industrial sensor circuit, and has good flexibility, corrosion resistance, high temperature resistance, wear resistance and tensile resistance.

7. Copper sheathing tube: the copper-based cable is mainly used for special cables such as fireproof cables, mineral insulated cables and the like, and the normal electrification of the cable can be well kept for a period of time even if a fire disaster occurs because the melting point of copper is high.

It can be seen that the cable sleeves are used in many applications, such as: 1. the cable can be prevented from being corroded and extruded by building materials such as cement; 2. the line replacement is convenient for later maintenance; 3. corrosion resistance and long service life, and can be used in a humid saline-alkali zone; 4. the flame retardant and heat resistant properties are good, and the flame retardant can be used at a high temperature of 130 ℃ for a long time without deformation and can not burn when meeting fire; 5. high strength and rigidity. The cable is directly buried under a traffic lane without adding a concrete protective layer, so that the construction progress of the cable engineering can be quickened; 6. the pipe is flexible and can resist damage caused by external heavy pressure and foundation settlement; 7. the anti-interference performance of external signals is good; 8. the inner wall is smooth and does not scratch the cable. The design adopts the connected mode of socket joint formula, and is connected easy to assemble. The joint is sealed by a rubber sealing ring, so that the joint is suitable for expansion with heat and contraction with cold, and mud and sand are prevented from entering the joint.

However, the existing cable sleeves have the defects of no high temperature resistance, easy aging, low mechanical strength, unsmooth inner wall, weak and weak current resistance and the like, so that the cable sleeves have a great improvement space.

Disclosure of Invention

In order to overcome the defects and shortcomings of the prior art, the invention aims to provide the manufacturing method of the cable protective sleeve which is not easy to age, has higher mechanical strength, smooth inner wall of the sleeve and reliable structure and can resist strong and weak current.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a manufacturing method of a cable protective sleeve comprises the following specific steps:

s1, moving the glass fiber to a first glue dipping tank for glue dipping and pre-straightening of the middle straight-pull winding layer under the action of a push rod of a tractor;

s2, continuously moving a push rod of the tractor towards the direction of the winding machine, simultaneously carrying out a straight-pulling process of a middle straight-pulling winding layer, and further coating the glass fiber felt with a sleeve by coating equipment to form a fiber felt layer on the inner wall of the sleeve;

s3, winding the middle straight-pull winding layer and the inner wall glass fiber felt layer of the sleeve into a plurality of layers by a winding machine to form a thickness, and wrapping the inner wall of the sleeve with a mold core tubular column by the glass fiber felt for treatment after winding;

s4, soaking the wound sleeve in a second soaking tank, and hanging the soaked sleeve on the upper plate;

s5, after soaking, continuing to keep the straightening state of the sleeve semi-finished product on the upper disc so as to ensure that the surface effect on the inner wall of the sleeve is smooth;

s6, the tractor moves continuously through the push rod, and then the glass fiber mat is further coated on the sleeve through the coating equipment to form a glass fiber mat layer on the outer wall of the sleeve, so that the integral forming effect of the sleeve is better;

s7, after the molding is finished, the molded product enters a heating mold through the action of a push rod of a tractor to be cured and molded;

s8, the tractor continuously moves through the push rod, clamps the periphery of the sleeve and guides the sleeve out;

and S9, finally, cutting the sleeve according to the required size by a cutting machine to form a finished sleeve product.

As a further example, in step S1, the glass fiber is moved in the direction of the winder by the pusher action of the tractor, avoiding the first dip tank, and the Czochralski process of pulling the intermediate Czochralski wound layer is not required.

Preferably, in step S1, the first dip tank is a rotary immersion dip tank.

Preferably, in step S4, the second dip tank is a rotary immersion dip tank.

Preferably, in step S7, a first heating cavity, a second heating cavity and a third heating cavity are sequentially disposed in the heating mold, and three heating cavities are respectively provided with three heating blocks capable of providing different temperatures.

Preferably, the temperature of the first heating cavity is 60-70 ℃; the temperature of the second heating cavity is 120-140 ℃; the temperature of the third heating cavity is above 130 ℃.

Preferably, the temperature of the first heating cavity is 65 ℃; the temperature of the second heating cavity is 125 ℃; the temperature of the third heating chamber is 140 ℃.

Preferably, in step S8, at least two of the tractors are arranged in parallel.

The invention has the beneficial effects that: the sleeve pipe is made to form a structure with a middle straight-pull winding layer, an inner wall glass fiber felt layer and an outer wall glass fiber felt layer in a glass fiber weaving and glass fiber felt coating mode, and the glass fiber material has good high temperature resistance and insulating property, so that the overall high temperature resistance, ageing resistance and strong and weak current resistance of the sleeve pipe can be effectively improved, and the mechanical strength of the structure is high.

After soaking and accomplish and past the sleeve pipe semi-manufactured goods of hanging wall, continue to keep the state of flare-outing, can be smooth in order to ensure the surface effect who comes out on the intraductal wall of cover, through the further cladding sleeve pipe of glass fiber felt, form outer wall glass fiber felt layer to ensure that the whole more shaping effect of sleeve pipe is better, add man-hour moreover, the sleeve pipe is shaping more easily, is favorable to the assurance of structure and appearance quality.

Be equipped with first heating chamber, second heating chamber and third heating chamber in proper order in the heating die, three heating chamber has respectively to be equipped with the three heating piece that can provide different temperatures, and through this kind of mode of heating that advances one by one, the curing effect is more even, and overall structure can keep higher uniformity, and the quality is the accuse performance.

Drawings

FIG. 1 is a schematic flow diagram of the present invention;

fig. 2 is a schematic flow chart of a second embodiment of the present invention.

In the figure: 1. the glass fiber winding machine comprises glass fibers 2, a tractor 3, a first steeping vat 4, a winding machine 5, an inner wall fiber mat layer 6, a glass fiber mat 7, a mold core pipe column 8, a second steeping vat 9, a coating device 10, an outer wall glass fiber mat layer 11, a heating mold 12, a cutting machine 13, a sleeve 14, a middle straight pull winding layer 15, a first heating cavity 16, a second heating cavity 17 and third heating.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and are not intended to limit the present invention.

As shown in fig. 1, a method for manufacturing a cable protective sleeve includes the following steps:

s1, moving the glass fiber 1 to a first glue dipping tank 3 for glue dipping and pre-straightening of a middle straight-pull winding layer under the action of a push rod of a tractor 2;

s2, the push rod of the tractor 2 continuously moves towards the direction of the winding machine 4, meanwhile, the straight pulling process of the middle straight pulling winding layer is carried out, the glass fiber felt 14 is further coated on the sleeve 13 through the coating equipment 9, the inner wall fiber felt layer of the sleeve 13 is formed, and the source of power forming the straight pulling effect is the tractor 2;

s3, winding the middle straight-pull winding layer 14 and the inner wall glass fiber felt layer 5 of the sleeve 13 by a winding machine 4 for a plurality of layers to form a thickness, and wrapping the inner wall of the sleeve 13 on the mold core tubular column 7 by the glass fiber felt 6 for treatment after winding; the thicknesses mentioned are specific to the actual requirements of the product.

S4, soaking the wound sleeve 13 in a second soaking tank 8, and hanging the soaked sleeve on the upper plate;

s5, after the soaking is finished and the semi-finished product of the sleeve 8 on the upper disc is subjected to the straightening state, so that the surface effect coming out of the inner wall of the sleeve 8 is smooth;

s6, the tractor 2 moves continuously through the push rod, then the glass fiber mat 6 is further coated with the sleeve through the coating equipment 9, and the outer wall glass fiber mat layer 10 of the sleeve 13 is formed, so that the integral forming effect of the sleeve 13 is better;

s7, after the molding is finished, the molded product enters the heating mold 11 for curing molding under the action of a push rod of the tractor 2;

s8, the tractor 2 continues to move through the push rod, clamps the periphery of the sleeve 13 and guides the sleeve 13 out;

and S9, finally, cutting the sleeve according to the required size by the cutting machine 12 to form a finished product of the sleeve 13.

As a further example, as shown in FIG. 2, in step S1, the glass fiber 1 is moved toward the winder 4 by the pusher action of the tractor 2, avoiding the first dip tank 3, and the intermediate Czochralski winding layer 14 is not pulled. Can select for use the mode of sleeve pipe 13 in a flexible way through this mode, can not need the straight pull according to customer's demand, and only process with the mode that the ring twined, perhaps straighten and twine the mode of inter combination with the ring, can realize nimble double-purpose effect finally, satisfy different customer's requirement.

In step S1 and step S4, the first dip tank 3 and the second dip tank 8 may adopt a rotary immersion type dip, which enables more uniform and efficient dipping work.

In step S7, a first heating cavity 15, a second heating cavity 16, and a third heating cavity 17 are sequentially disposed in the heating mold 11, and three heating cavities are respectively provided with three heating blocks capable of providing different temperatures.

As an embodiment, the temperature of the first heating cavity 15 is 60 ℃ to 70 ℃; the temperature of the second heating cavity 16 is 120-140 ℃; the temperature of the third heating chamber 17 is 130 ℃ or higher.

As an example, the temperature of the first heating cavity 15 is 65 ℃; the temperature of the second heating cavity 16 is 125 ℃; the temperature of the third heating chamber 17 is 140 ℃.

In addition, the temperatures of the first heating cavity 15, the second heating cavity 16 and the third heating cavity 17 can also be set according to the requirements of actual products or other factors, and thus, the preferred temperatures and ranges given in the above embodiments are not limited.

As an example, in order to better ensure the dual-purpose effect and to make the traction work more efficient and stable, the traction machine 2 is at least two machines arranged in parallel.

According to the scheme, the sleeve 13 is made to form the structure of the middle straight-pull winding layer 14, the inner wall glass fiber felt layer 5 and the outer wall glass fiber felt layer 10 in a manner of weaving the glass fibers 1 and coating the glass fiber felt 6, and the glass fiber material has good high temperature resistance and insulation performance, so that the overall high temperature resistance, aging resistance and strong and weak current resistance of the sleeve can be effectively improved, and the mechanical strength of the structure is high.

After soaking and the sleeve pipe semi-manufactured goods of going to hanging wall, continue to keep the state of flare-outing, can be in order to ensure that the surface effect that comes out on the intraductal wall of cover is smooth, further cladding sleeve pipe 13 through glass fiber felt 6, form outer wall glass fiber felt layer 10, realize that the whole more shaping effect of sleeve pipe 13 is better, add man-hour in addition, sleeve pipe 13 also is the shaping more easily, is favorable to overall structure and appearance quality's assurance.

Heating die 11 is interior to be equipped with first heating chamber 15, second heating chamber 16 and third heating chamber 17 in proper order, and three heating chamber has respectively to be equipped with the three heating piece that can provide different temperatures, and through this kind of mode of heating that advances one by one, the solidification effect is more even, and overall structure can keep higher uniformity and higher quality to the accuse performance.

Through this scheme, can also realize nimble sleeve pipe and nimble double-purpose effect, can be that the ring twines the mode also can be the mode of flare-out and ring twine the inter combination, satisfy different customers' requirement.

The foregoing is merely an illustration of preferred embodiments, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A manufacturing method of a cable protective sleeve is characterized by comprising the following steps: the method comprises the following specific steps:

2. A method for manufacturing a cable protective sleeve according to claim 1, wherein: in step S1, the glass fiber is moved towards the winding machine by the push rod of the tractor, so as to avoid the first dip tank and avoid the straight-pulling process of the middle straight-pulling winding layer.

3. A method for manufacturing a cable protective sleeve according to claim 1, wherein: in step S1, the first dip tank adopts a rotary immersion dip method.

4. A method for manufacturing a cable protective sleeve according to claim 1, wherein: in step S4, the second dip tank adopts a rotary immersion dip method.

5. A method for manufacturing a cable protective sleeve according to claim 1, wherein: in step S7, a first heating cavity, a second heating cavity and a third heating cavity are sequentially arranged in the heating mold, and three heating cavities are respectively provided with three heating blocks capable of providing different temperatures.

6. The method of claim 5, wherein the step of forming the cable protective sleeve comprises: the temperature of the first heating cavity is 60-70 ℃; the temperature of the second heating cavity is 120-140 ℃; the temperature of the third heating cavity is above 130 ℃.

7. The method of claim 5, wherein the step of forming the cable protective sleeve comprises: the temperature of the first heating cavity is 65 ℃; the temperature of the second heating cavity is 125 ℃; the temperature of the third heating chamber is 140 ℃.

8. A method for manufacturing a cable protective sleeve according to claim 1, wherein: in step S8, at least two of the tractors are arranged in parallel.