Liquid graphite smearing device

Abstract

The utility model discloses a liquid graphite smearing device which is characterized in that an inclined groove is arranged above a device frame, the front end and the rear end of the inclined groove adopt sponge plates and are provided with cable scraping holes, the bottom of the inclined groove is inclined, and a graphite liquid backflow hole is formed in the lower position and is connected with a graphite liquid backflow pipe; a graphite liquid box right opposite to a graphite liquid return pipe is arranged on one side below the device frame, a diaphragm pump is installed on the other side below the device frame, a liquid inlet of the diaphragm pump is connected with a hole in the bottom of the graphite liquid box, and a liquid outlet of the diaphragm pump is connected with a graphite liquid outlet pipe and then forks to form a graphite liquid spraying pipe and a graphite liquid pressure relief pipe. A graphite liquid outlet valve is mounted on the graphite liquid spraying pipe, and an outlet of the graphite liquid outlet valve is positioned above the inclined groove; a graphite liquid pressure relief valve is mounted on the graphite liquid pressure relief pipe, and an outlet of the graphite liquid pressure relief valve is connected to a graphite liquid box. The device is suitable for process operations such as coating liquid graphite on the cable, so that the graphite consumption is small, the coating is uniform, the coating thickness of the surface of the cable is uniform and reliable, the product quality of the high-voltage cable is improved, and meanwhile, the first-pass yield of the high-voltage cable is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the processing technology of high voltage cable high voltage sheath, especially relates to a liquid graphite smearing device. BACKGROUND

[0002] At present, high voltage crosslinked polyethylene insulation power cable is used for AC system power transmission and distribution, and the metal sheath layer usually adopts corrugated aluminum sheath. Some cable sheath layers are coated with a graphite layer, which has the following effects:

[0003] 1. Electrical insulation performance: Graphite has excellent electrical insulation properties, which can effectively prevent electrical short circuit between the cable outer sheath and the conductor. It can block moisture, dust, chemicals and other substances from entering the cable interior, protecting the conductor and insulation material from damage.

[0004] 2. Anti-corrosion protection: Graphite can provide good anti-corrosion protection for the cable outer sheath. It can resist the corrosion of various chemicals and environmental conditions on the cable, prolonging the service life of the cable.

[0005] 3. Mechanical protection: The graphite layer also provides a certain degree of mechanical protection. It can reduce the damage to the structure of the cable caused by external impact and collision during installation, transportation and use, preventing the sheath layer from cracking or breaking.

[0006] 4. Flame retardant performance: Graphite has high temperature resistance and flame retardant properties. When a fire occurs in the cable, the graphite layer can prevent the spread of fire, reducing the impact on the surrounding environment.

[0007] However, currently, graphite powder is mainly used for coating, which has the defects of poor coating adhesion, the need for repeated coating, large amount of graphite consumption, and uneven coating.

[0008] In order to better meet the special requirements of coating the graphite layer on the surface of the cable insulation layer, the present inventor has specially developed and designed a liquid graphite coating device, thus the present case is generated. CONTENT OF THE UTILITY MODEL

[0009] The utility model aims to provide a liquid graphite coating device to be suitable for cable coating liquid graphite process operation, so that the graphite consumption is small, the coating is uniform, the coating thickness on the surface of the cable is uniform and reliable, the quality of high voltage cable products is improved, and the first pass rate of high voltage cable is improved.

[0010] In order to achieve the above purpose, the solution of the utility model is:

[0011] The utility model provides a liquid graphite smearing device, including device frame, the tilt groove is arranged above device frame, and the front and back ends of tilt groove adopt the sponge board, and the cable scraping hole for cable passing through is opened on the front and back two pieces of sponge board, the bottom of tilt groove is in the form of downward inclination with one side high and one side low, and the bottom of tilt groove is opened graphite liquid backflow hole and is connected graphite liquid backflow pipe at low place, the graphite liquid tank opposite graphite liquid backflow pipe is arranged on one side below device frame, the diaphragm pump is installed on the other side below device frame, and the inlet of diaphragm pump is connected with the bottom opening of graphite liquid tank through graphite liquid inlet pipe, and the outlet of diaphragm pump is connected graphite liquid outlet pipe, and graphite liquid outlet pipe bifurcates and forms graphite liquid spraying pipe and graphite liquid pressure relief pipe, and graphite liquid outlet valve is installed on graphite liquid spraying pipe, and the outlet of graphite liquid spraying pipe is located above tilt groove and is opposite the cable entering tilt groove, and graphite liquid pressure relief valve is installed on graphite liquid pressure relief pipe, and the outlet of graphite liquid pressure relief pipe is connected to graphite liquid tank.

[0012] The middle of the tilt groove is also provided with a sponge board, and the cable scraping hole for cable passing through is opened on the middle sponge board.

[0013] The thickness of the sponge board is controlled to be 50mm±5mm.

[0014] The tilt groove and the graphite liquid tank are made of stainless steel plate.

[0015] The diaphragm pump is installed on the bottom plate, and the bottom plate is installed below the device frame.

[0016] After the above scheme, before starting work, the soluble graphite powder and water are added into the graphite liquid tank for fully stirring and mixing, then the graphite liquid in the graphite liquid tank is pumped out through the diaphragm pump, the size of the graphite liquid outlet valve and the graphite liquid pressure relief valve is adjusted to reach the graphite liquid flow suitable for the production process requirement. The cable to be smeared is passed through the cable scraping holes at the two ends of the tilt groove, so that the cable is below the graphite liquid spraying pipe, the graphite liquid from the graphite liquid spraying pipe is sprayed on the surface of the cable, the surface of the cable in the tilt groove is soaked by the graphite liquid, and the graphite liquid is further smeared on the surface of the cable when passing through the cable scraping hole of the sponge board, so that the graphite thickness and brightness on the surface of the cable are ensured.

[0017] The utility model product has the advantages of simple structure design, stable performance, convenient use, good safety performance and mechanical performance, and is suitable for cable smearing liquid graphite process operation, improves the high pressure sheath production process level, has great auxiliary effect on the graphite process product needing to be smeared, liquid graphite is added at any time, and the phenomenon of half-way feeding due to insufficient graphite is avoided. Compared with the powder smearing device, the sufficient and uniform liquid graphite can be improved, the graphite consumption amount is small, the smearing is uniform, the flow size is adjustable, the surface of the cable is reliably smeared with uniform thickness, the saturation and brightness of the graphite on the surface of the cable are ensured, the high voltage cable product quality is improved, and the one-time qualification rate of the high voltage cable is improved.

[0018] The utility model is further illustrated below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description are simply described below. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope of protection. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0020] Fig. 1 It is the perspective view of the utility model;

[0021] Fig. 2 It is the front view of the utility model;

[0022] Fig. 3 It is the side view of the utility model;

[0023] Fig. 4 It is the top view of the utility model.

[0024] Label explanation:

[0025] Device frame 1, bottom plate 11, inclined groove 2, graphite liquid backflow hole 21, graphite liquid backflow pipe 22, sponge plate 3, cable scraping hole 31, graphite liquid tank 4, diaphragm pump 5, graphite liquid inlet pipe 51, graphite liquid outlet pipe 52, graphite liquid spraying pipe 53, graphite liquid pressure relief pipe 54, graphite liquid outlet valve 55, graphite liquid pressure relief valve 56. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] It should be noted that the terms up, down, left, right, inner, outer, first, second and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features, unless otherwise specifically limited.

[0028] ReferenceFigs. 1 to 4 The utility model discloses a liquid graphite smearing device, including device frame 1.

[0029] The utility model discloses a liquid graphite smearing device, including device frame 1.

[0030] The utility model discloses a liquid graphite smearing device, including device frame 1.

[0031] The utility model discloses a liquid graphite smearing device, including device frame 1.

[0032] The utility model discloses a liquid graphite smearing device, including device frame 1.

[0033] The key technology of the device is that a layer of graphite is smeared on the surface of the sheath during high-voltage cable production, effectively preventing electrical short circuit between the outer sheath and the conductor of the cable, having high high-temperature resistance and flame resistance, and reducing the influence of fire on the surrounding environment. The liquid graphite smearing device according to the utility model is based on the original high-voltage cable production equipment, and is proposed and transformed to improve the saturation and brightness of graphite smearing. In addition to retaining the original production function, the device is additionally provided with a stainless steel inclined groove 2, a 50mm-thick sponge plate 3 installed on the stainless steel inclined groove 2, a stainless steel graphite liquid tank 4, a diaphragm pump 5 and accessories, so as to provide sufficient concentrated graphite liquid, ensure uniform and reliable smearing thickness of the cable surface, make the surface smearing thickness consistent and smooth, and thus improve the quality of the sheath layer of the high-voltage cable product and the product qualification rate.

[0034] In conclusion, the utility model relates to a high-voltage sheath process of high-voltage cable, and the feature is that the graphite smearing on the surface of the cable is more uniform, and no smearing omission or virtual smearing phenomenon occurs. Compared with the powder graphite smearing device, the device adopts a graphite liquid tank, and the graphite and water are added in one step before starting the machine, and are fully stirred and uniformly distributed. The graphite liquid is delivered by the diaphragm pump and sprayed on the surface of the cable, so as to ensure the uniformity of the graphite on the surface of the cable. The graphite on the surface of the cable is thickened by a plurality of groups of thickening sponge soaking and scraping, so as to ensure the consistency and smoothness of the graphite on the surface of the cable, and improve the first-time qualification rate of the high-voltage cable product. The liquid graphite device has the characteristics of stable performance, convenient use, good safety performance and mechanical performance.

[0035] The above description is only an embodiment of the utility model, and is not a limitation on the protection scope of the utility model. It should be noted that, after reading the specification, the person skilled in the art can make equivalent changes according to the design idea of the case, and the changes fall within the protection scope of the case.

Claims

1. A liquid graphite coating device, characterized in that: The device includes a frame; an inclined trough is installed above the frame, with sponge boards at both ends for cable scraping holes to pass through. The bottom of the inclined trough slopes downwards, with a graphite liquid return hole at the lower end connected to a graphite liquid return pipe; a graphite liquid tank is installed on one side of the frame, directly opposite the graphite liquid return pipe; a diaphragm pump is installed on the other side of the frame, with its inlet connected to a bottom opening in the graphite liquid tank via a graphite liquid inlet pipe, and its outlet connected to a graphite liquid outlet pipe. The graphite liquid outlet pipe branches into a graphite liquid spray pipe and a graphite liquid pressure relief pipe, with a graphite liquid outlet valve installed on the spray pipe. The outlet of the spray pipe is located above the inclined trough and directly opposite the cable entering the inclined trough. A graphite liquid pressure relief valve is installed on the pressure relief pipe, and its outlet is connected to the graphite liquid tank.

2. The liquid graphite coating device as described in claim 1, characterized in that: A sponge plate is also provided in the middle of the inclined groove, and cable scraping holes are opened on the middle sponge plate for the cable to pass through.

3. A liquid graphite coating device as described in claim 1 or 2, characterized in that: The thickness of the sponge board is controlled at 50mm ± 5mm.

4. The liquid graphite coating device as described in claim 1, characterized in that: The inclined trough and graphite liquid tank are made of stainless steel plate.

5. The liquid graphite coating device as described in claim 1, characterized in that: The diaphragm pump is mounted on a base plate, which is located below the device frame.

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