Middle joint semi-conductive paint spraying device for cable

Abstract

The invention discloses a cable intermediate joint semi-conductive paint spraying device which is characterized by comprising a joint specification scanning device, a conveyor belt, an inspection box, a vulcanization box, a purification device and an industrial personal computer which are connected in sequence, and the industrial personal computer controls all equipment; rotatable mandrels which are continuously arranged and vertically arranged are arranged on the conveying belt, and the mandrels penetrate through a middle hole of the middle connector to fix the middle connector. A paint spraying box is erected on the conveying belt, automatic spraying guns which are continuously arranged are symmetrically arranged on the side wall of the paint spraying box in the movement direction of the core shaft, the automatic spraying guns move up and down in a reciprocating mode, and the movement directions of the two sets of automatic spraying guns are opposite. The intermediate joint is fixed by adopting the vertical mandrel, and paint is sprayed up and down while rotating in the process of spraying semi-conductive paint, so that paint surface deformation caused by contact between a paint surface and a transmission belt can be effectively prevented while the spraying uniformity is ensured, the semi-conductive paint is distributed more uniformly, and the electric field uniformity of the intermediate joint can be ensured.

Description

Technical Field

[0001] The invention relates to a semi-conductive paint spraying device for an intermediate joint of a cable, belonging to the technical field of cable production. Background Art

[0002] Medium voltage cable is an important part of the power circuit system. It is installed in the middle of the cable line. Its main function is to make the line unobstructed, keep the cable sealed, and ensure the insulation level at the cable joint, so that the cable can operate safely and reliably. In the production process of cable joints, it is necessary to first coat the vulcanized layer and then make the semi-conductive part. The existing semi-conductive layer processing technology is generally divided into two types. One is to use a vulcanizing molding machine to inject glue and vulcanize on the insulating part, and the other is to spray semi-conductive paint on the outer layer of the insulating part. The first method has a high cost due to the large consumption of semi-conductive materials and a long time. The second method is generally due to the high requirements of the fluidity of the semi-conductive paint in the spraying process, resulting in uneven distribution of the semi-conductive paint after spraying due to gravity problems. In addition, this process often causes breakdown at the joint due to insufficient spraying thickness, which ultimately affects the quality of the cable. Summary of the invention

[0003] The purpose of the present invention is to provide a semi-conductive paint spraying device for an intermediate joint of a cable to solve the above technical problems.

[0004] The technical solution to achieve the purpose of the present invention is: a semi-conductive paint spraying device for an intermediate joint of a cable, characterized in that: it includes a joint specification scanning device, a conveyor belt, an inspection box, a vulcanizing box and a purification device, and an industrial computer connected in sequence, and the industrial computer controls all the equipment; the conveyor belt has a continuously arranged vertically arranged rotatable core shaft, and the core shaft passes through the middle hole of the intermediate joint to fix it; a paint spraying box is mounted on the conveyor belt, and the side walls of the paint spraying box are symmetrically provided with continuously arranged automatic spray guns along the movement direction of the core shaft, and the automatic spray guns reciprocate up and down, and the two groups of automatic spray guns move in opposite directions.

[0005] In the above structure, the middle joint is placed in the vertical core shaft for fixation, and then sent to the conveyor belt. After the specification scanning device is used to obtain its specific parameters, it is sent to the paint spraying box for painting. After being accommodated, it is sent to the inspection box to check the uniformity of the semi-conductive paint on its surface, and finally sent to the vulcanization box to complete the vulcanization.

[0006] In this device, the middle joint is set vertically. After entering the paint spray box, it rotates while spraying paint. Two sets of automatic paint spray guns on both sides of the paint spray box spray paint up and down. The latex paint is sprayed more evenly in the horizontal direction during the painting process, and the vertical direction can offset part of the influence of gravity due to the reverse movement of the automatic paint spray gun. As long as the vulcanization and fixation are completed before the deformation of the semi-conductive paint exceeds the critical point, the thickness of the semi-conductive paint can be controlled within a specific range.

[0007] The above scheme can overcome the problem of the middle joint falling off and deforming due to contact with the conveyor belt when using the horizontal spray painting scheme. It can also overcome the problem of electric field distribution imbalance and heat concentration caused by the accumulation of part of the semi-conductive paint on one side of the middle joint due to the influence of gravity. Compared with other schemes, it can effectively reduce the amount of semi-conductive paint used. Since the paint layer is thinner, it solidifies faster and has a higher production efficiency.

[0008] Further or optionally, the vertical mandrel is suitable for intermediate joints of different specifications, and the mandrel is an expansion mandrel.

[0009] Further or optionally, in order to reduce the amount of semi-conductive paint used and ensure that the coating covers the entire intermediate joint while reducing the painting time, the joint specification scanning device collects data as the workpiece diameter d and the workpiece height h, and sets the automatic spray gun arrangement length to l; sets the automatic spray gun movement speed to v1, the workpiece rotation linear speed to v2, and the workpiece movement speed along the conveyor belt to v3, and the parameters should meet

[0010] In order to reduce the influence of gravity, the amount of paint sprayed by the automatic spray gun can also be slightly adjusted. When the automatic spray gun moves from one end to the other, the amount of paint sprayed is reduced to achieve uniform distribution of the semi-conductive paint.

[0011] Further or optionally, in order to improve the detection accuracy of the inspection box, the surface of the vertical mandrel is evenly distributed with high-intensity LED light-emitting elements, and a photoelectric detector is arranged in the inspection box. During use, the LED light-emitting element emits strong light, and the photoelectric detector detects the light transmittance of the surface of the intermediate joint. When the semi-conductive paint on the surface of the intermediate joint is unevenly sprayed or missed, the light transmittance of the surface will be inconsistent with other parts. The photoelectric detector will send a signal to the industrial computer, and the unqualified intermediate joints will be selected by manual or automatic rejection, and then repainted or scrapped. Specifically, when an unqualified intermediate joint appears, the vertical mandrel will withdraw the intermediate joint, and the unqualified intermediate joint will be taken out by manual or mechanical claws.

[0012] Further or optionally, in order to increase the vulcanization speed, the vulcanization temperature in the vulcanization box is 170° C. to 185° C.

[0013] Further or optionally, in order to prevent the semi-conductive paint from polluting the workshop environment, the purification device is arranged close to the vulcanization box, including an exhaust device and a filtering device, wherein a ventilation duct is provided between the exhaust device and the vulcanization box, and a multi-layer filtering element is provided on the side of the filtering device close to the exhaust device, and an exhaust port is provided at the air outlet of the filtering device.

[0014] In the above structure, the semi-conductive paint dispersed in the air enters the exhaust device through the ventilation duct in the vulcanization box, and after being contained, it is harmlessly treated by the filter device, and the clean exhaust gas is discharged into the air. This can effectively prevent the semi-conductive paint from polluting the working environment and affecting the health of the operators.

[0015] Further or optionally, in order to improve purification efficiency, the filter element is composed of a smoke filter layer and an adhesive.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] (1) The present application adopts a vertical core shaft to fix the middle joint. During the process of spraying the semi-conductive paint, the paint is sprayed up and down while rotating. While ensuring the uniformity of spraying and effectively preventing the paint surface from contacting the transmission belt and causing deformation of the paint surface, the up and down relative movement of the automatic paint spray gun can offset the uneven distribution of the semi-conductive paint caused by gravity to a certain extent, thereby ensuring the uniformity of the electric field of the middle joint.

[0018] (2) The vertical mandrel of the present application is an expansion mandrel, which has better adaptability when the specifications of the intermediate joint change.

[0019] (3) The present application strictly limits the automatic spray gun, the linear rotation speed of the workpiece, and the movement speed of the workpiece on the conveyor belt, which can reduce the painting time and the amount of paint while ensuring the uniformity of the semi-conductive paint on the surface of the intermediate joint, thereby saving the painting cost and manufacturing time.

[0020] (4) The core shaft of the present application is equipped with an LED light-emitting element inside, and a photoelectric detector is installed in the inspection box, which can effectively determine the uniformity of the semi-conductive paint coating.

[0021] (5) The vulcanization temperature of the vulcanization box of the present application is controlled to be 170°C to 185°C, and the vulcanization speed is faster.

[0022] (6) The present application is also provided with a purification device, which can effectively prevent the semi-conductive paint from polluting the workshop environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0024] Figure 1 It is a schematic diagram of the device connection relationship of the present invention.

[0025] The reference numerals in the accompanying drawings are:

[0026] Joint specification scanning device 1, conveyor belt 2, inspection box 3, vulcanizing box 4, purification device 5, industrial computer 6. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0033] (Example 1)

[0034] See Figure 1 The equipment connection relationship diagram is shown. A semi-conductive paint spraying device for an intermediate joint of a cable in this embodiment is characterized in that: it includes a joint specification scanning device 1, a conveyor belt 2, an inspection box 3, a vulcanizing box 4 and a purification device 5, and an industrial computer 6 connected in sequence, and the industrial computer 6 controls all the equipment; the conveyor belt 2 is provided with a vertically rotatable mandrel arranged in succession, and the mandrel passes through the middle hole of the intermediate joint to fix it; a paint spraying box is mounted on the conveyor belt 2, and the side walls of the paint spraying box are symmetrically provided with continuously arranged automatic spray guns along the movement direction of the mandrel, and the automatic spray guns reciprocate up and down, and the two groups of automatic spray guns move in opposite directions.

[0035] Before the workpiece enters the conveyor belt, the joint specification scanning device 1 is used to obtain the workpiece diameter d and the workpiece height h, and then the workpiece is sent to the paint spraying box. The core shaft rotates while moving forward along the conveyor, and the symmetrically arranged automatic spray guns spray paint on the workpiece. During the painting process, the automatic spray guns on both sides of the paint spraying box move in opposite directions to ensure the uniformity of the paint.

[0036] When the performance of semi-conductive paint is certain, there is often a critical point for the thickness of the paint, which is generally considered to be 0.2-0.4mm. When the flow rate of the automatic spray gun is fixed, the minimum spray time required for the paint is also constant. Under this premise, the arrangement length of the automatic spray gun is set to l; the movement speed of the automatic spray gun is set to v1, the linear speed of the workpiece rotation is set to v2, and the movement speed of the workpiece along the conveyor belt is set to v3. The parameters should meet When the above quantitative relationship is met, the automatic spray gun only needs to complete one path at a minimum to complete the painting action.

[0037] On the one hand, the mandrel plays the role of fixing the workpiece, and can also be used to assist in detecting the performance of the workpiece. The expansion mandrel can be used to fix workpieces of different diameters. High-intensity LED light-emitting elements are evenly distributed on the surface of the mandrel. A photoelectric detector is arranged in the inspection box. The photoelectric detector collects the light transmittance data of the workpiece. The larger the data collected by the photoelectric detector, the greater the unevenness of the semi-conductive paint layer on its surface, and the workpiece needs to be reworked or scrapped.

[0038] The vulcanization temperature in the vulcanization box 4 is 170° C. to 185° C. to facilitate rapid vulcanization molding.

[0039] The purification device 5 is arranged close to the vulcanization box 4, and includes an exhaust device and a filtering device, wherein a ventilation duct is arranged between the exhaust device and the vulcanization box 4, and a multi-layer filter element is arranged on the side of the filtering device close to the exhaust device, and a smoke filter layer and an adhesive are filled in the filter element. An exhaust port is arranged at the air outlet of the filtering device, and the filtered exhaust gas is discharged into the air through the exhaust port.

[0040] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-conductive paint spraying device for an intermediate joint of a cable, characterized in that: The invention comprises a joint specification scanning device (1), a conveyor belt (2), an inspection box (3), a vulcanizing box (4) and a purification device (5) which are connected in sequence, and an industrial control computer (6), wherein the industrial control computer (6) controls all the devices; the conveyor belt (2) is provided with a vertically rotatable mandrel which passes through a hole in an intermediate joint to fix the mandrel; a paint spraying box is mounted on the conveyor belt (2), and the side wall of the paint spraying box is symmetrically provided with a continuously arranged automatic spraying gun along the movement direction of the mandrel, wherein the automatic spraying gun reciprocates and two rows of automatic spraying guns reciprocate up and down, and the movement directions of the two groups of automatic spraying guns are opposite.

2. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 1, characterized in that: The mandrel is an expansion mandrel.

3. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 1, characterized in that: The data collected by the joint specification scanning device (1) are the workpiece diameter d and the workpiece height h, and the automatic spray gun arrangement length is set to l; the automatic spray gun movement speed is set to v1, the workpiece rotation linear speed is set to v2, and the workpiece movement speed along the conveyor belt is set to v3. The parameters should satisfy 4. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 1, characterized in that: The surface of the vertical core shaft is evenly distributed with high-intensity LED light-emitting elements, and a photoelectric detector is arranged in the inspection box.

5. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 1, characterized in that: The vulcanization temperature in the vulcanization box (4) is 170°C to 185°C.

6. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 1, characterized in that: The purification device (5) is arranged close to the vulcanization box (4), and comprises an exhaust device and a filter device, wherein a ventilation duct is arranged between the exhaust device and the vulcanization box (4), a multi-layer filter element is arranged on a side of the filter device close to the exhaust device, and an exhaust port is arranged at an air outlet of the filter device.

7. A semi-conductive paint spraying device for an intermediate joint of a cable according to claim 5, characterized in that: The filter element is composed of a smoke filter layer and an adhesive.

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