Dry evaporation crosslinking device for power cable crosslinking

Abstract

The utility model discloses a dry-evaporation crosslinking device for power cable crosslinking. The dry-evaporation crosslinking device comprises a sealed box body, an open container and a heat release device, wherein one side of the sealed box body is provided with an access door; a crosslinking medium is stored in the open container; the heat release device comprises a liquid circulating pipeline, a circulating pool arranged outside the sealed box body, circulating heating liquid in the circulating pool and an electric heating device arranged in the circulating pool; the sealing box body comprises first, second and third side surfaces, the liquid circulating pipeline is arranged on the inner sides of the first, second and third side surfaces, and the head and tail ends of the liquid circulating pipeline are respectively connected with the circulating pool to form a circulating loop; a flow control valve is mounted on the outlet section of the liquid circulating pipeline; the open containers are distributed on the bottom face of the sealing box body on the inner sides of the first side face, the second side face and the third side face, and reels wound with cables are placed among the open containers. The cable can effectively prevent the conductor from being affected with damp and water, prevents the conductor from being oxidized, is good in safety, and improves the performance and the service life of the cable.

Description

Technical Field

[0001] The utility model relates to the field of cable production, in particular to a dry steam cross-linking device for cross-linking power cables. Background Art

[0002] At present, the cross-linking process of cables is to process polyethylene materials with linear molecular structures through specific processing methods to form cross-linked polyethylene with three-dimensional mesh-shaped wire structure. This greatly increases the long-term allowable operating temperature and short-circuit allowable temperature of the cable, and greatly improves the actual performance of the cable while maintaining its original excellent electrical properties.

[0003] At present, XLPE insulated cables have been widely used in my country's power industry. For low-voltage XLPE cables, silane cross-linking is generally used in the industry, and silane cross-linking generally adopts boiling heating or steam heating. In actual use, once the head is not tight or the cable insulation is damaged, water will enter the cable during boiling heating or steaming, thus forming a fatal defect of the cable. In addition, the cable insulation will come into contact with water vapor under high temperature and high pressure, and the material will absorb more water. When cooling, supersaturated water will precipitate, forming large micro-pores, which will affect the performance and life of the cable. Summary of the invention

[0004] The purpose of the invention of the utility model is to provide a dry steam cross-linking device for power cable cross-linking, which can effectively prevent the conductor of the cable from being damp and water ingress, prevent the conductor of the cable from being oxidized, has good safety, and improves the performance and service life of the cable.

[0005] The technical purpose of the utility model is achieved through the following technical solutions:

[0006] A dry steam cross-linking device for cross-linking power cables comprises a sealed box with an inlet and outlet door on one side, an open container storing a cross-linking medium and a heat release device; the heat release device comprises a liquid circulation pipeline, a circulation pool arranged outside the sealed box, a circulating heating liquid in the circulation pool and an electric heating device arranged in the circulation pool; the sealed box comprises a first side surface, a second side surface and a third side surface, the liquid circulation pipeline is arranged on the inner side of the first side surface, the inner side of the second side surface and the inner side of the third side surface, and the head and tail ends of the liquid circulation pipeline are respectively connected to the circulation pool to form a circulation loop; a flow control valve is installed on the outlet section of the liquid circulation pipeline; there are multiple open containers, which are distributed on the bottom surface of the sealed box on the inner side of the first side surface, the inner side of the second side surface and the inner side of the third side surface, and after a reel with a cable wound thereon is placed in the sealed box, the reel is placed between the open containers.

[0007] The box panel of the sealed box consists of an outer protective plate, a middle thermal insulation layer and an inner protective plate.

[0008] The material of the outer guard plate is iron plate, steel plate or corrugated steel plate, the material of the middle insulation layer is Class A inorganic microporous material, inorganic bubble insulation material or polyurethane foam insulation material, and the material of the inner guard plate is iron plate or steel plate.

[0009] The liquid circulation pipeline is "S" shaped, made of a steel pipe, with 10 to 12 layers, 0.4mm-0.6mm interlayer spacing, and the bottom steel pipe is 0.4-0.6mm away from the box floor; the inner diameter of the steel pipe is φ28-φ40mm, and the wall thickness is 2-4mm.

[0010] The circulating heating liquid is industrial soft water, salt-free water or deoxygenated soft water.

[0011] The cross-linking medium is industrial soft water, salt-free water or deoxygenated soft water.

[0012] The open container is provided with a sealing cover which can adjust the size of the container opening.

[0013] The container body of the container is a cylindrical structure, the sealing cover is composed of two semicircular sealing plates, the sealing cover includes a first sealing plate and a second sealing plate arranged up and down, the second sealing plate is fixed on the inner wall of the container body, and the second sealing plate is rotatably connected to the first sealing plate through a rotating shaft.

[0014] There are six open containers, two of which are placed on the first side, the second side and the third side, and the open containers are arranged directly below the liquid circulation pipeline.

[0015] The material of the open container is high temperature resistant plastic, glass or ceramic.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model can effectively prevent the conductor of the cable from being damp and water ingress, prevent the conductor of the cable from being oxidized, and has good safety, and improves the performance and service life of the cable. Through the dry steam cross-linking method, heat is provided by a circulating heating method, and the energy transmission medium can be recycled and reused, saving resources. Compared with the traditional steam method, it does not produce greenhouse gases, and the cross-linking method is more environmentally friendly.

[0018] 2. The box panel of the sealed box of the utility model is a multi-layer structure, which has a strong thermal insulation effect.

[0019] 3. The open container of the utility model is provided with a sealing cover capable of adjusting the size of the container opening; the adoption of this technical measure can effectively improve the applicability of the open container so that it can meet various needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the sealed box and the heat release device;

[0024] Figure 4 It is a structural schematic diagram of a box panel of a sealed box;

[0025] Figure 5 is a schematic diagram of the structure of a reel with a cable wound around it;

[0026] Figure 6 It is a structural schematic diagram of an open container;

[0027] Figure 7 It is another structural schematic diagram of an open container;

[0028] Figure 8 yes Figure 7 A cross-sectional view of

[0029] Meaning of the codes in the figure:

[0030] 1—sealed box; 11—entry and exit door; 12—first side; 13—second side; 14—third side; 15—temperature adjustment detection device; 16—humidity adjustment detection device;

[0031] 101 - outer guard plate; 102 - middle insulation layer; 103 - inner guard plate;

[0032] 2—heat release device; 21—circulation pool; 22—liquid circulation pipeline; 221—exit section; 222—inlet section; 23—flow control valve; 24—circulating heating liquid;

[0033] 3—open container; 31—container body; 32—sealing cover; 321—first sealing plate; 3211—rotating shaft; 3212—connecting platform; 322—second sealing plate; 33—servo motor; 331—motor rotating shaft;

[0034] 4—reel; 41—cable. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] 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 present invention to be protected, 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.

[0037] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] like Figure 1 — Figure 8 As shown, a dry steam cross-linking device for cross-linking of power cables comprises a sealed box 1 with an inlet and outlet door 11 on one side, an open container 3 storing a cross-linking medium and a heat release device 2; the heat release device 2 comprises a liquid circulation pipeline 22, a circulation pool 21 arranged outside the sealed box 1, a circulating heating liquid 24 in the circulation pool 21 and an electric heating device arranged in the circulation pool 21; the sealed box 1 comprises a first side surface 12, a second side surface 13 and a third side surface 14, and the head and tail ends of the liquid circulation pipeline 22 are respectively connected to the circulation pool 21 to form a circulation loop; a flow control valve 23 is installed on the outlet section 221 of the liquid circulation pipeline 22; the liquid circulation pipeline 22 is distributed on the inner side of the first side surface 12, the inner side of the second side surface 13 and the inner side of the third side surface 14; there are a plurality of open containers 3, which are distributed on the bottom surface of the sealed box 1 on the inner side of the first side surface 12, the inner side of the second side surface 13 and the inner side of the third side surface 14, and after the reel 4 with the cable 41 wound is put into the sealed box 1, the reel 4 is placed between the open containers 3.

[0039] In actual use, the circulating heating liquid 24 is industrial soft water, salt-free water or deoxygenated soft water. The cross-linking medium is industrial soft water, salt-free water or deoxygenated soft water. The dry steaming method can effectively prevent the conductor of the cable from being damp and water ingress, prevent the conductor of the cable from being oxidized, have good safety, and improve the performance and service life of the cable. Through the dry steaming cross-linking method, heat is provided by a circulating heating method, and the energy transmission medium can be recycled and reused, saving resources. Compared with the traditional steam method, no greenhouse gas is generated, and the cross-linking method is more environmentally friendly.

[0040] like Figure 1 — Figure 4 As shown, the sealed box 1 is a rectangular parallelepiped structure, and the size of the sealed box 1 is 3 meters × 2.5 meters × 2.5 meters. In actual use, the box panel of the sealed box 1 is a multi-layer structure, which has a strong thermal insulation effect. The box panel of the sealed box 1 consists of an outer protective plate 101, an intermediate thermal insulation layer 102, and an inner protective plate 103. Among them, the material of the outer protective plate 101 is an iron plate, a steel plate or a corrugated steel plate, the material of the intermediate thermal insulation layer 102 is a Class A inorganic microporous material, an inorganic bubble-shaped thermal insulation material or a polyurethane foam thermal insulation material; the material of the inner protective plate is an iron plate or a steel plate.

[0041] like Figure 1 — Figure 4 As shown, the sealed box 1 is a box with an opening on one side, which includes three side surfaces, a top surface and a bottom surface. An access door 11 is provided on the open side for transporting the reel 4 and inspecting the internal facilities.

[0042] like Figure 1 — Figure 4 As shown, the sealed box 1 includes a first side surface 12, a second side surface 13 and a third side surface 14; a liquid circulation pipeline 22 is arranged inside the first side surface 12, inside the second side surface 13 and inside the third side surface 14; the head and tail ends of the liquid circulation pipeline 22 are respectively connected to the circulation pool 21 to form a circulation loop; a flow control valve 23 is installed on the outlet section 221 of the liquid circulation pipeline 22. In actual use, the head and tail ends of the liquid circulation pipeline 22 are arranged at intervals up and down, and the liquid circulation pipeline 22 includes an outlet section 221 and an inlet section 222 exposed between the sealed box 1 and the circulation pool 21. The liquid circulation pipeline 22 is "S" shaped, which is made of a steel pipe, the number of layers is 10 to 12 layers, the interlayer spacing is 0.4mm-0.6mm, and the lowest steel pipe is 0.4-0.6mm away from the box body ground; the inner diameter of the steel pipe is φ28-φ40mm, and the wall thickness is 2-4mm.

[0043] The electric heating device adopts the existing technology, for example, a heating rod, etc. In actual use, the electric heating device is connected to an external power source.

[0044] like Figure 1 — Figure 4As shown, the material of the open container 3 is high temperature resistant plastic, glass or ceramic. The volume of the open container 3 is generally 2L. Six open containers 3 are arranged in the sealed box, which are distributed on the bottom surface of the sealed box body 1 inside the first side 12, the second side 13 and the third side 14. Two open containers 3 are placed on each side, and the open container 3 is arranged directly below the liquid circulation pipeline 22. The adoption of this technical measure can ensure uniform heating of the cable during the cross-linking process.

[0045] like Figure 6 — Figure 8 As shown, the open container 3 is provided with a sealing cover 32 that can adjust the size of the container opening. In actual use, the material of the sealing cover 32 is high temperature resistant plastic, glass or ceramic. Specifically, the container body 31 of the open container 3 is a cylindrical structure, and the sealing cover 32 is composed of two semicircular sealing plates, and the sealing cover 32 includes a first sealing plate 321 and a second sealing plate 322 arranged up and down, and the second sealing plate 322 is fixed on the inner side wall of the container body 31, and the second sealing plate 322 is rotatably connected with the first sealing plate 321 through a rotating shaft 3211. In actual use, the second sealing plate 322 is provided with a rotating shaft 3211, and the first sealing plate 321 is rotatably connected with the first sealing plate 321 through a rotating shaft 3211. By rotating the first sealing plate 321, the size of the opening between it and the second sealing plate 322 is adjusted, so as to adjust the humidity in the sealed box 1 during the dry steam cross-linking process. The adoption of this technical measure can effectively improve the applicability of the open container 3, so that it can meet a variety of needs.

[0046] In actual use, the entrance door 11 of the sealed box 1 is provided with a temperature display panel and a humidity display panel. Correspondingly, a temperature sensor and a humidity sensor electrically connected to the temperature display panel and the humidity display panel are provided in the sealed box 1. The flow control valve 23 controls the flow of the circulating heating liquid 24 to control the temperature in the sealed box 1, and the humidity in the sealed box 1 is controlled by the number of open containers 3 and the size of the container openings of the open containers 3. The utility model adopts a dry steam cross-linking method, and heat is provided by a circulating heating method. The energy transmission medium can be recycled and reused, saving resources. The utility model is a heat energy cycle. Compared with the traditional steam method, it does not produce greenhouse gases, and the cross-linking method is more environmentally friendly.

[0047] In order to improve accuracy and facilitate operation, the flow control valve 23 and the sealing cover 32 capable of adjusting the size of the container opening are both remotely controlled.

[0048] The flow control valve 23 is an electric control valve.

[0049] like Figure 1-Figure 4As shown, a temperature adjustment detection device 15 and a humidity adjustment detection device 16 are installed on the outer plate of the inlet and outlet door 11 of the sealed box, which are used to display the temperature and humidity values ​​in the box in real time and adjust the temperature and humidity. Among them, the temperature adjustment detection device 15 and the humidity adjustment detection device 16 adopt existing conventional technologies. For example, the temperature adjustment detection device 15 includes a temperature adjustment detection module; the temperature adjustment detection module is electrically connected to a temperature control module, the temperature adjustment detection module includes a temperature sensor and an electric control valve, the temperature control module includes a temperature control chip, and the temperature control chip is electrically connected to the temperature sensor, the electric control valve, the temperature display panel, etc.

[0050] The humidity adjustment detection device 16 includes a humidity adjustment detection module, which is electrically connected to a humidity control module. The humidity adjustment detection module includes a humidity sensor and a servo motor 33. The humidity control module includes a humidity control chip, which is electrically connected to the humidity sensor, the servo motor 33, the humidity display panel, etc.

[0051] like Figure 7 , Figure 8 As shown, a servo motor 33 is fixedly mounted on the second sealing plate 322 via a connecting platform 3212, a rotating shaft 3211 of the servo motor 33 is arranged downward, and the first sealing plate 321 is fixed on the rotating shaft 3211; the second sealing plate 322 is rotatably connected to the first sealing plate 321 via the rotating shaft 3211. In actual use, the servo motor 33 drives the first sealing plate 321 to rotate relative to the second sealing plate 322, thereby adjusting the size of the opening between the first sealing plate 321 and the second sealing plate 322, thereby adjusting the humidity in the sealed box 1 during the dry steam cross-linking process.

[0052] The operator monitors the temperature and humidity values ​​in the box in real time through the temperature display panel and the humidity display panel, controls the flow of the circulation pool 21 through the electric control valve to control the temperature in the sealed box at 70-85°C, and adjusts the opening size of the sealing cover 32 through the servo motor 33 to control the humidity in the sealed box at 85-90%.

[0053] The above embodiments are only used to illustrate the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still modify the specific technical solutions in the above embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the present invention.

Claims

1. A dry steam cross-linking device for cross-linking power cables, characterized in that: It comprises a sealed box with an inlet and outlet door on one side, an open container storing a cross-linking medium, and a heat release device; The heat release device comprises a liquid circulation pipeline, a circulation pool arranged outside the sealed box, a circulating heating liquid in the circulation pool, and an electric heating device arranged in the circulation pool; The sealed box body comprises a first side surface, a second side surface and a third side surface, the liquid circulation pipeline is arranged inside the first side surface, inside the second side surface and inside the third side surface, and the head and tail ends of the liquid circulation pipeline are respectively connected to the circulation pool to form a circulation loop; a flow control valve is installed on the outlet section of the liquid circulation pipeline; There are multiple open containers distributed on the bottom surface of the sealed box inside the first side, the second side and the third side. After the reel with the cable wound around it is put into the sealed box, the reel is placed between the open containers.

2. The dry steam cross-linking device for cross-linking of power cables according to claim 1, characterized in that: The box panel of the sealed box consists of an outer protective plate, a middle thermal insulation layer and an inner protective plate.

3. The dry steam cross-linking device for cross-linking of power cables according to claim 2, characterized in that: The material of the outer guard plate is iron plate, steel plate or corrugated steel plate, the material of the middle insulation layer is Class A inorganic microporous material, inorganic bubble insulation material or polyurethane foam insulation material, and the material of the inner guard plate is iron plate or steel plate.

4. The dry steam cross-linking device for cross-linking of power cables according to claim 1, characterized in that: The liquid circulation pipeline is "S" shaped and is made of a steel pipe with 10 to 12 layers, a layer spacing of 0.4mm-0.6mm, and the bottom steel pipe is 0.4-0.6mm away from the box floor; the inner diameter of the steel pipe is φ28-φ40mm, and the wall thickness is 2-4mm.

5. The dry steam cross-linking device for cross-linking of power cables according to claim 1, characterized in that: The circulating heating liquid is industrial soft water, salt-free water or deoxygenated soft water.

6. The dry steam cross-linking device for cross-linking of power cables according to claim 1, characterized in that: The cross-linking medium is industrial soft water, salt-free water or deoxygenated soft water.

7. The dry steam cross-linking device for cross-linking of power cables according to claim 1, characterized in that: The open container is provided with a sealing cover which can adjust the size of the container opening.

8. The dry steam cross-linking device for cross-linking of power cables according to claim 7, characterized in that: The container body of the container is a cylindrical structure, the sealing cover is composed of two semicircular sealing plates, the sealing cover includes a first sealing plate and a second sealing plate arranged up and down, the second sealing plate is fixed on the inner wall of the container body, and the second sealing plate is rotatably connected to the first sealing plate through a rotating shaft.

9. The dry steam cross-linking device for cross-linking power cables according to claim 1 or 7, characterized in that: There are six open containers, two of which are placed on the first side, the second side and the third side, and the open containers are arranged directly below the liquid circulation pipeline.

10. The dry steam cross-linking device for cross-linking power cables according to claim 1 or 7, characterized in that: The material of the open container is high temperature resistant plastic, glass or ceramic.

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