A medium voltage cross-linked cable production device

Abstract

The present invention belongs to the technical field of vulcanization equipment in a cable production process, and discloses a medium-voltage cross-linked cable production device; the device comprises a nitrogen purification component, a vulcanization pipeline is connected to the nitrogen purification component through a first pipeline and a second pipeline respectively, the nitrogen purification component comprises a receiving pipeline, the receiving pipeline comprises a receiving section and a diversion section, the receiving section is connected to the diversion section, a first connecting port is provided at one end of the receiving section, a second connecting port and a third connecting port are provided on the diversion section, the first connecting port is connected to the first pipeline, the second connecting port is connected to a vulcanization recovery component, and the third connecting port is connected to the second pipeline, the vulcanization recovery component can collect sulfides in the nitrogen; the device solves the problem of low product quality caused by the inability to clean up sulfides in the vulcanization pipeline under the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of vulcanization equipment in a cable production process, and in particular to a medium-voltage cross-linked cable production device. Background Art

[0002] At present, the most commonly used catenary cross-linking method in the medium-voltage cable industry is the conductor. The cross-linking method adopted is that the conductor is co-extruded through the machine head in a three-layer co-extrusion method to complete the production of the conductor shielding layer, insulation layer, and insulation shielding layer. After the cross-linking method is extruded, it needs to pass through a continuous sealed cross-linking pipe and complete the entire cross-linking process through high temperature and high pressure. During the medium-pressure cross-linking process in production, the vulcanization tube is filled with nitrogen, and the nitrogen flows from low to high. When the cross-linked wire core passes through the vulcanization pipe, the vulcanization temperature decreases step by step with the interval of the pipe. The temperature in the first interval is the highest, and then the temperature of the pipe will gradually decrease. Sulfide will be produced as the temperature decreases through the vulcanization pipe. The mixed gas of sulfide and nitrogen will accompany the entire production process. The sulfide will be adsorbed on the surface of the wire core. The sulfide adsorbed on the surface of the wire core will cause the cumyl alcohol, methane, etc. produced during the cross-linking reaction of the insulation layer and other microscopic gases to be blocked between the insulation and the insulation shield. After cooling, white spots and other influencing factors will form.

[0003] The existing technical field uses a high-pressure water gun to clean cables 360°, which takes a lot of time. Due to the catenary cross-linking method adopted, the vulcanized pipe is in a curved state, which causes the sulfide to accumulate at a specific point and cannot be guaranteed to be completely removed. This greatly affects product quality, production efficiency and customer satisfaction with the product, while also increasing labor. Summary of the Invention

[0004] The object of the present invention is to provide a medium voltage cross-linked cable production device to solve the problem in the prior art that sulfides in a vulcanization pipeline cannot be cleaned out completely, resulting in low product quality.

[0005] To achieve this object, the present invention adopts the following technical solution: The present invention provides a medium-voltage cross-linked cable production device, including a vulcanization pipeline and a nitrogen purification component. The vulcanization pipeline is connected to the nitrogen purification component through a first pipeline and a second pipeline respectively. The nitrogen purification component includes a receiving pipeline, and the receiving pipeline includes a receiving section and a diversion section. The receiving section is connected to the diversion section. A first connecting port is provided at one end of the receiving section, and a second connecting port and a third connecting port are provided on the diversion section. The first connecting port is connected to the first pipeline, the second connecting port is connected to the vulcanization recovery component, and the third connecting port is connected to the second pipeline. The vulcanization recovery component can collect sulfides in the nitrogen.

[0006] Preferably, a heating element is installed between the third connecting port and the second pipeline, and the heating element can increase the temperature of the nitrogen.

[0007] Preferably, the vulcanization recovery component includes a recovery valve and a recovery tank. The recovery valve is provided with an outlet, the outlet is installed with the recovery valve, and the outlet is communicated with the recovery tank.

[0008] Preferably, the receiving section is arc-shaped.

[0009] Preferably, the receiving section is bent at 90°.

[0010] Preferably, the vulcanization pipeline includes a pre-cooling zone and a heating zone, the heating zone is higher than the pre-cooling zone, a fourth connecting port is formed at the lowest point of the heating zone, and the second pipeline is connected to the vulcanization pipeline through the fourth connecting port.

[0011] Preferably, a sewage discharge solenoid valve is installed on the vulcanization pipe below the fourth communication port.

[0012] Preferably, the vulcanization pipe below the fourth communication port is recessed downward, and the sewage discharge solenoid valve is provided at the lowest point of the recess.

[0013] Beneficial effect: By adding a nitrogen purification component that can filter sulfides to the original vulcanization pipeline, the sulfide content in the nitrogen can be reduced each time it circulates. After entering the receiving section, the sulfide solidifies on the side wall, reducing the concentration of sulfide in the vulcanization pipe. The sulfide will not be adsorbed on the surface of the wire core but will be discharged into the vulcanization recovery component, reducing the concentration of sulfide in the vulcanization pipeline, and improving the quality of wire rods and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main body of the medium voltage cross-linked cable production device of the present invention;

[0015] Figure 2 It is a partial enlarged view of the receiving pipeline of the medium-voltage cross-linked cable production device of the present invention.

[0016] In the figure: 1-first pipeline; 2-second pipeline; 3-receiving pipeline; 31-receiving section; 32-diversion section; 33-first connecting port; 34-second connecting port; 35-third connecting port; 4-heating element; 5-recovery valve; 6-recovery box; 7-heating area; 71-fourth connecting port; 8-pre-cooling area; 9-sewage discharge solenoid valve; 10-purifier. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0018] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0019] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0021] The prior art vulcanization tube is filled with nitrogen, which provides a stable reaction environment for the cross-linking reaction of the cable. However, due to the precipitation of sulfides, the mixture of nitrogen and sulfides will diffuse the sulfides into the heating and pre-cooling zones throughout the vulcanization tube, causing a chemical reaction between the wire core surface and the sulfides. At the same time, due to the catenary solution adopted by the present invention, the catenary vulcanization tube is curved due to gravity, so the solidified sulfides will also gather at the lowest point in the vulcanization tube. If cleaned with a high-pressure water gun, the vulcanization tube may be damaged and the cleaning effect will be poor, which will waste processing time and reduce production efficiency.

[0022] In order to solve the above problems, Figures 1 to 2 As shown, the present invention provides a medium-voltage cross-linked cable production device, including a vulcanization pipeline and a nitrogen purification component. The vulcanization pipeline is connected to the nitrogen purification component through a first pipeline 1 and a second pipeline 2 respectively. The nitrogen purification component includes a receiving pipeline 3, and the receiving pipeline 3 includes a receiving section 31 and a diversion section 32. The receiving section 31 is connected to the diversion section 32. A first connecting port 33 is provided at one end of the receiving section 31, and a second connecting port 34 and a third connecting port 35 are provided on the diversion section 32. The first connecting port 33 is connected to the first pipeline 1, the second connecting port 34 is connected to the vulcanization recovery component, and the third connecting port 35 is connected to the second pipeline 2. The vulcanization recovery component can collect sulfides in the nitrogen.

[0023] When the mixed gas composed of nitrogen and sulfide enters the upper nitrogen filter device, the sulfide solidifies on the inner wall of the receiving pipe 3 and can be collected by the sulfide recovery component at the bottom due to gravity. Since the diameter of the sulfide is large and the weight is also high, the sulfide recovery component can separate the sulfide and nitrogen through the filter element, or it can precipitate the sulfide and discharge it into the recovery box 6 by general condensation. The method adopted by the present invention is the latter method, but the method of separating sulfide from nitrogen is not unique and is not limited to the above two methods.

[0024] A heating element 4 is installed at the end of the nitrogen filtering device, that is, between the third connecting port 35 and the second pipeline 2. The heating element 4 can increase the temperature of the nitrogen. By increasing the temperature of the nitrogen and redirecting the heated pure nitrogen into the vulcanization pipeline, the solidified sulfides in the vulcanization pipeline are heated and vaporized again. The sulfides are carried back to the first pipeline 1 and passed through the nitrogen purification component again for separation. In this way, the sulfides in the vulcanization pipeline are continuously vaporized by the high-temperature clean nitrogen flowing from the second pipeline 2 and are finally collected and discharged by the vulcanization recovery component in the nitrogen purification component. The sulfide concentration in the vulcanization pipeline decreases with the increase of processing time, and the surface of the cable can be made smooth without the occurrence of white spots caused by sulfides.

[0025] The sulfide recovery component includes a recovery valve 5 and a recovery box 6. The recovery valve 5 is provided with an outlet, which is connected to the recovery box 6. Sulfide falls into the recovery box 6 through the recovery valve 5. After the sulfide is mixed with the liquid in the recovery box 6, the above-mentioned sulfide is sent to the recovery box 6 for recovery after passing through the purifier 10, without secondary pollution of the production environment, thereby improving the safety of cable production.

[0026] The vulcanization pipeline of the present invention includes two groups. When entering the nitrogen purification component from the first pipeline 1, the nitrogen will turn along the arc due to the arc-shaped receiving section 31. However, due to the heavy weight of sulfides, the sulfides will directly collide with the curved side wall of the receiving section, while the nitrogen will continue to move forward along the curved receiving section 31, thereby achieving preliminary separation of nitrogen and sulfides, reducing the concentration of sulfides, and improving the cleanliness of the nitrogen.

[0027] The receiving section 31 of the present invention is bent at 90 degrees, so that the nitrogen enters the receiving section 31 horizontally along the front end of the receiving section 31. When turning at the 90-degree position, most of the sulfides directly collide with the vertical side wall of the receiving section 31 horizontally due to inertia, thereby achieving the separation of the sulfides and improving the purity of the nitrogen.

[0028] In the existing technology, the second pipeline 2 is connected to the pre-cooling zone 8, but this will cause sulfides to appear in the pre-cooling zone 8. Since the vulcanization pipeline includes the pre-cooling zone 8 and the heating zone 7, and the heating zone 7 is higher than the pre-cooling zone 8, the present invention connects the second pipeline 2 to the lowest point of the heating zone 7, that is, the position before the pre-cooling zone 8, to reduce the area contaminated by sulfides and keep the pre-cooling zone 8 clean at all times. A fourth connecting port 71 is formed at the lowest point of the heating zone 7, and the second pipeline 2 is connected to the vulcanization pipeline through the fourth connecting port 71, so that nitrogen flows from the lowest point to the highest point of the heating zone 7, so that sulfide crystals will not appear in the pre-cooling section.

[0029] A sewage discharge solenoid valve 9 is installed on the sulfide pipe on the lower side of the fourth connecting port 71 to shorten the opening interval of the sewage discharge solenoid valve 9. Since sulfide will accumulate at the lowest point, that is, below the fourth connecting port 71, the sewage discharge solenoid valve 9 is frequently opened to discharge a large amount of sulfide to prevent its accumulation.

[0030] The sulfide pipe below the fourth connecting port 71 is recessed downward, and the recess forms an area close to a funnel. Due to gravity, the sulfides will eventually gather in the recessed area. A sewage discharge solenoid valve 9 is provided at the lowest point of the recess to facilitate the solenoid valve to discharge a large amount of sulfides or other impurities.

[0031] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A medium voltage cross-linked cable production device, comprising a vulcanized pipe, characterized in that: The invention also includes a nitrogen purification component, wherein the vulcanization pipeline is connected to the nitrogen purification component through a first pipeline (1) and a second pipeline (2), respectively. The nitrogen purification component includes a receiving pipeline (3), and the receiving pipeline (3) includes a receiving section (31) and a diversion section (32). The receiving section (31) is connected to the diversion section (32). A first communication port (33) is provided at one end of the receiving section (31), and a second communication port (34) and a third communication port (35) are provided on the diversion section (32). The first communication port (33) is connected to the first pipeline (1), the second communication port (34) is connected to the vulcanization recovery component, and the third communication port (35) is connected to the second pipeline (2). The vulcanization recovery component can collect sulfides in nitrogen. The receiving section (31) is arc-shaped, and the receiving section (31) is bent at 90 degrees.

2. The medium voltage cross-linked cable production device according to claim 1, characterized in that: A heating element (4) is installed between the third communication port (35) and the second pipeline (2), and the heating element (4) can increase the temperature of the nitrogen.

3. The medium voltage cross-linked cable production device according to claim 1, characterized in that: The vulcanization recovery component comprises a recovery valve (5) and a recovery tank (6); the recovery valve (5) is provided with an outlet, the outlet is equipped with the recovery valve (5), and the outlet is communicated with the recovery tank (6).

4. The medium voltage cross-linked cable production device according to claim 1, characterized in that: The vulcanization pipeline comprises a pre-cooling zone (8) and a heating zone (7), wherein the heating zone (7) is higher than the pre-cooling zone (8), and a fourth connecting port (71) is formed at the lowest point of the heating zone (7), and the second pipeline (2) is connected to the vulcanization pipeline through the fourth connecting port (71).

5. The medium voltage cross-linked cable production device according to claim 4, characterized in that: A sewage discharge solenoid valve (9) is installed on the vulcanization pipeline below the fourth communication port (71).

6. The medium voltage cross-linked cable production device according to claim 5, characterized in that: The lowest point of the vulcanization pipeline below the fourth communication port (71) is recessed downward, and the sewage discharge solenoid valve (9) is provided at the lowest point of the recess.

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