Vertical cross-linked cable production line sealing ring, sealing system and sealing method

Abstract

The invention discloses the field of cables and wires, and particularly relates to a vertical cross-linked cable production line sealing ring, a sealing system and a sealing method.The vertical cross-linked cable production line sealing ring comprises a bottom support, a sealing gasket is arranged on one side of the bottom support, a protection plate is arranged on the side, away from the sealing gasket, of the bottom support, and a sealing seat is arranged on the protection plate; the bottom of the sealing seat abuts against the top of the sealing gasket, a top sleeve is arranged on the side, away from the protection plate, of the sealing seat, the bottom of the top sleeve abuts against the top of the sealing gasket, a pressing ring is arranged on the top of the top sleeve, and a reinforcing pipe is detachably connected to the top of the pressing ring. The top of the sealing gasket abuts against the bottom of the second protruding edge and the bottom of the third protruding edge, when the sealing gasket is pressed to deform, the second protruding edge and the third protruding edge can support the sealing gasket, the number of rigid supporting areas of the sealing gasket is reduced through the design, the sealing gasket is not prone to deformation, and the air tightness and durability of the sealing gasket are improved.

Description

Technical Field

[0001] The invention relates to the field of cables and wires, and in particular to a sealing ring, a sealing system and a sealing method for a vertical cross-linked cable production line. Background Art

[0002] In the production process of ultra-high voltage cables, the main function of nitrogen is to reduce the reaction temperature to control the reaction speed and degree, thereby improving the physical and chemical properties of ultra-high voltage cables. At the same time, nitrogen is an inert gas that can isolate air and harmful gases. Therefore, it is widely used in the production process of ultra-high voltage cables.

[0003] The existing technology of vertical cross-linked cable production line consumes a large amount of nitrogen. After analyzing the reasons, the vertical cross-linked cable production line has the following problems:

[0004] (1) The gasket gland is composed of two halves. During the gasket pressing process or the production process, if it is not effectively fixed, or if the gasket gland is displaced due to the movement of the cable and the hydraulic cylinder, the gasket cannot be effectively compressed, resulting in more nitrogen leakage.

[0005] (2) The main component of the gasket is rubber. There is a part of the gasket that has no rigid support. When there is a certain pressure difference on both sides, the gasket is easy to deform, forming a gap at the joint of the gasket, causing more nitrogen leakage.

[0006] (2) In addition, the compressibility of gas determines the existence of pressure difference. As long as there is a gap, it may cause a lot of gas leakage. The existing sealing method cannot prevent nitrogen leakage.

[0007] Therefore, those skilled in the art are committed to developing a sealing ring, a sealing system and a sealing method for a vertical cross-linked cable production line to reduce nitrogen leakage and save production costs. Summary of the invention

[0008] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a sealing ring, a sealing system and a sealing method for a vertical cross-linked cable production line.

[0009] To achieve the above-mentioned purpose, the present invention provides a vertical cross-linked cable production line sealing ring, including a bottom support, a sealing gasket is provided on one side of the bottom support, a guard plate is provided on the side of the bottom support away from the sealing gasket, a sealing seat is provided on the guard plate, the bottom of the sealing seat abuts against the top of the sealing gasket, a top sleeve is provided on the side of the sealing seat away from the guard plate, the bottom of the top sleeve abuts against the top of the sealing gasket, a clamping ring is provided on the top of the clamping ring, and a reinforcing tube is detachably connected to the top of the clamping ring.

[0010] Preferably, the bottom support is provided with a first easing groove, the first easing groove is matched with a bottom plate, the top of the bottom plate is provided with a second easing groove, the second easing groove is matched with a sealing gasket, and the side wall of the sealing gasket abuts against the side wall of the second easing groove.

[0011] Preferably, the sealing seat is provided with a first ridge and a second ridge on opposite sides respectively, and a third clearance groove is opened on the inner wall of the guard plate, the third clearance groove cooperates with the first ridge, and the bottom of the second ridge abuts against the top of the sealing gasket.

[0012] Preferably, the bottom of the sealing seat abuts against the top of the bottom plate.

[0013] Preferably, a third ridge is provided at the bottom of the top sleeve, the bottom of the third ridge abuts against the top of the sealing gasket, and the side of the third ridge away from the cable abuts against the side of the second ridge away from the sealing seat;

[0014] Preferably, the top sleeve abuts against the side wall of the sealing seat at a side away from the cable, and a fourth evacuation groove is formed at the top of the top sleeve.

[0015] Preferably, a fourth ridge is provided at the bottom of the clamping ring, the bottom of the fourth ridge cooperates with a fourth clearance groove, and the top of the clamping ring is detachably connected to the reinforcing tube.

[0016] A vertical cross-linked cable production system comprises the vertical cross-linked cable production line sealing ring as described above, and also comprises a shell, on which two of the sealing rings are arranged at intervals, and a water injection port is arranged between the two sealing rings on the shell.

[0017] A nitrogen sealing method for vertical cross-linked cable production is implemented by using the vertical cross-linked cable production line sealing ring as described above.

[0018] Specifically, the following steps are included:

[0019] S1. Put the shell on the outside of the cable;

[0020] S2, two vertical cross-linked cable production line sealing rings as described above are arranged on the housing at intervals;

[0021] S3, installing a water injection port between the two sealing rings;

[0022] S4. Water is injected into the shell through the water injection port. The nitrogen pressure in the shell is about 1MPa, and the water pressure is slightly greater than the nitrogen pressure.

[0023] The beneficial effect of the present invention is that: through the improvement of the sealing ring structure, the top of the sealing gasket is abutted against the bottom of the second ridge and the third ridge. When the sealing gasket is deformed under pressure, the second ridge and the third ridge can support the sealing gasket. This design reduces the area of ​​the sealing gasket without rigid support, makes the sealing gasket not easy to deform, and improves the airtightness and durability of the sealing gasket.

[0024] The present invention also proposes a new method for sealing the nitrogen in the shell, that is, injecting water into the shell with the above-mentioned sealing rings arranged at intervals. Since nitrogen is difficult to dissolve in water and the water pressure of the injected water is greater than the nitrogen pressure, water leaks along the gap, thereby achieving the purpose of sealing the gap, greatly reducing the leakage of nitrogen and saving costs. In addition, the present invention has a simple structure and the improvement has little impact on the main equipment, so it has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a sealing ring in a specific implementation manner of the present invention.

[0026] Figure 2 It is a schematic diagram of the assembly of a sealing ring in a specific implementation manner of the present invention.

[0027] 1. Shell; 2. Bottom support; 2a. First clearance groove; 3. Sealing gasket; 4. Guard plate; 4a. Third clearance groove; 5. Sealing seat; 51. First ridge; 52. Second ridge; 6. Top sleeve; 61. Third ridge; 6a. Fourth clearance groove; 7. Pressure ring; 71. Fourth ridge; 8. Bottom plate; 8a. Second clearance groove; 9. Water inlet; 10. Reinforcement tube; 11. Cable. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which 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 direction, be constructed and operated in a specific manner, and therefore cannot be understood as limiting the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] like Figure 1As shown, a vertical cross-linked cable production line sealing ring includes a bottom support 2, which provides an installation foundation for the overall structure, a first clearance groove 2a is opened on one side of the bottom support 2, and the first clearance groove 2a is matched with a bottom plate 8, and the side wall of the first clearance groove 2a abuts against the side wall of the bottom plate 8 to fix its position, a second clearance groove 8a is opened on the top of the bottom plate 8, and a sealing gasket 3 is matched in the second clearance groove 8a, and a first through hole is opened on the sealing gasket 3, and the first through hole is slidably matched with the cable 11. In this embodiment, the first through hole and the cable 11 are clearance matched. A guard plate 4 is provided on the side of the bottom support 2 away from the sealing gasket 3. The guard plate 4 is tightly connected to the bottom support 2 to reduce nitrogen leakage. A third paving groove 4a is provided on the inner side of the guard plate 4. A sealing seat 5 is matched in the third paving groove 4a. The sealing seat 5 is respectively provided with a first convex ridge 51 and a second convex ridge 52 on opposite sides. The first convex ridge 51 extends horizontally in a direction away from the sealing seat 5. One end of the first convex ridge 51 away from the sealing seat 5 is snap-fitted with the third paving groove 4a. The second convex ridge 52 is located in the middle and lower section of the sealing seat 5 and also extends horizontally in a direction away from the sealing seat 5. The bottom of the second convex ridge 52 abuts against the top of the sealing gasket 3. The position of the sealing gasket 3 is fixed by snapping with each other to prevent the sealing gasket from leaking. 3 displacement, a top sleeve 6 is provided on the side of the sealing seat 5 away from the baffle, and a third ridge 61 extending vertically downward is provided at the bottom of the top sleeve 6. The third ridge 61 extends vertically downward and abuts against the top of the sealing gasket 3, and the side of the third ridge 61 away from the cable 11 abuts against the side of the second ridge 52 away from the sealing seat 5. When in use, the top of the sealing gasket 3 abuts against the second ridge 52 and the bottom of the third ridge 61. When the sealing gasket 3 is compressed and deformed, the second ridge 52 and the third ridge 61 can support the sealing gasket 3. This design reduces the area of ​​the sealing gasket 3 without rigid support, makes the sealing gasket 3 not easy to deform, and improves the airtightness and durability of the sealing gasket 3.

[0030] In this embodiment: the top sleeve 6 is abutted against the side wall of the sealing seat 5 away from the cable 11, and a fourth make way groove 6a is opened at the top of the top sleeve 6, and a clamping ring 7 is matched in the fourth make way groove 6a. The bottom of the clamping ring 7 is provided with a fourth ridge 71 extending vertically downward, and the fourth ridge 71 cooperates with the fourth make way groove 6a. The top of the clamping ring 7 is detachably connected to the reinforcing tube 10. In this embodiment, the detachable connection is a threaded connection. In other embodiments, other connection methods can be used, such as clamping, bonding, etc. The clamping ring 7 is fixed to the reinforcing tube 10 by threads, and the clamping ring 7, the top sleeve 6 and the sealing seat 5 abut against each other and limit each other, thereby reducing the situation where the top sleeve 6 and the sealing seat 5 cannot effectively compress the sealing ring due to the production progress of the cable 11 and the slight displacement of the hydraulic cylinder.

[0031] like Figure 2As shown, the present invention also provides a vertical cross-linked cable production sealing system, including the sealing ring as described above, and also including a shell 1, the shell 1 and the cable 11 are clearance-matched, the inner wall diameter of the shell 1 is larger than the outer wall diameter of the cable 11, and a cavity is left between the two, and two sealing rings as described above are arranged on the shell 1 at intervals, and a water injection port 9 is arranged between the two sealing rings on the shell 1. In the prior art, only one sealing ring is arranged on the shell 1, and nitrogen is under the sealing ring. The sealing ring is installed by means of an incision, and a gap is inevitably present at the incision, and a dynamic seal is also adopted between the cable 11 and the sealing pad. The nitrogen pressure during the operation of the equipment is about 1MPa. Gas has great compressibility. When there is a certain pressure difference, nitrogen will overflow upward along the gap between the cable 11 and the sealing gasket, thereby generating a large amount of consumption and increasing costs. The present invention arranges two improved sealing rings on the housing 1 at intervals, and then injects water into the cavity between the two sealing rings through the water injection port 9, and ensures that the water injection pressure is slightly greater than the nitrogen pressure. Since nitrogen is difficult to dissolve in water and the water injection pressure is greater than the nitrogen pressure, when the water fills the cavity formed by the sealing ring and the housing 1, the water overflows along the above-mentioned gap to the two ends of the cavity, thereby achieving the purpose of blocking the gap and reducing nitrogen leakage from the gap, thereby greatly saving production costs.

[0032] In addition, the present invention also provides a vertical cross-linked cable production sealing method, which is completed using the vertical cross-linked cable production line sealing ring as described above, and specifically includes the following steps:

[0033] S1. Put the housing 1 on the outside of the cable 11, leaving an air channel between the cable and the housing for nitrogen to flow;

[0034] S2. Two sealing rings as described above are arranged on the housing 1 at intervals;

[0035] S3, installing a water injection port 9 between the two sealing rings on the housing 1;

[0036] S4. Water is injected into the shell 1 through the water injection port 9. In the prior art, only one sealing ring is provided on the shell 1, and nitrogen is provided under the sealing ring. The sealing ring is installed by means of an incision, and a gap is inevitably present at the incision. A dynamic seal is also adopted between the cable 11 and the sealing gasket. The nitrogen pressure during equipment operation is about 1 MPa. Since the gas has great compressibility, when there is a certain pressure difference, the nitrogen will overflow upward along the gap between the cable 11 and the sealing gasket, thereby generating a large amount of consumption and increasing the cost. The present invention arranges two improved sealing rings on the shell 1 at intervals, and then injects water into the cavity between the two sealing rings through the water injection port 9, and ensures that the water pressure is slightly greater than the nitrogen pressure. Since nitrogen is less soluble in water, and the water pressure is greater than the nitrogen pressure, when the water fills the cavity formed by the sealing ring and the shell 1, the water overflows to both ends of the cavity along the above-mentioned gap, thereby achieving the purpose of sealing the gap and reducing the leakage of nitrogen from the gap, thereby greatly saving the production cost.

[0037] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A sealing ring for a vertical cross-linked cable production line, characterized in that: The invention comprises a bottom support (2), a sealing gasket (3) is provided on one side of the bottom support (2), a guard plate (4) is provided on the side of the bottom support (2) away from the sealing gasket (3), a sealing seat (5) is provided on the guard plate (4), the bottom of the sealing seat (5) is in contact with the top of the sealing gasket (3), a top sleeve (6) is provided on the side of the sealing seat (5) away from the guard plate (4), the bottom of the top sleeve (6) is in contact with the top of the sealing gasket (3), a clamping ring (7) is provided on the top of the clamping ring (7), and a reinforcing tube (10) is detachably connected to the top of the clamping ring (7).

2. The sealing ring for a vertical cross-linked cable production line according to claim 1, characterized in that: The bottom support (2) is provided with a first paving groove (2a), the first paving groove (2a) is matched with a bottom plate (8), the top of the bottom plate (8) is provided with a second paving groove (8a), the second paving groove (8a) is matched with the sealing gasket (3), and the side wall of the sealing gasket (3) is in contact with the side wall of the second paving groove (8a).

3. The sealing ring for a vertical cross-linked cable production line according to claim 1, characterized in that: The sealing seat (5) is provided with a first convex ridge (51) and a second convex ridge (52) on opposite sides respectively, and a third paving groove (4a) is provided on the inner wall of the guard plate (4), the third paving groove (4a) cooperates with the first convex ridge (51), and the bottom of the second convex ridge (52) abuts against the top of the sealing pad (3).

4. The sealing ring for a vertical cross-linked cable production line according to claim 2, characterized in that: The bottom of the sealing seat (5) abuts against the top of the bottom plate (8).

5. The sealing ring for a vertical cross-linked cable production line according to claim 1, characterized in that: The bottom of the top sleeve (6) is provided with a third ridge (61), the bottom of the third ridge (61) abuts against the top of the sealing pad (3), and the side of the third ridge (61) away from the cable (2) abuts against the side of the second ridge (52) away from the sealing seat (5); The top sleeve (6) abuts against the side wall of the sealing seat (5) at the side away from the cable (2), and a fourth clearance groove (6a) is formed at the top of the top sleeve (6).

6. The sealing ring for a vertical cross-linked cable production line according to claim 1, characterized in that: The bottom of the clamping ring (7) is provided with a fourth ridge (71), the bottom of the fourth ridge (71) cooperates with the fourth clearance groove (6a), and the top of the clamping ring (7) is detachably connected to the reinforcing tube (10).

7. A vertical cross-linked cable production system, characterized in that: It comprises a vertical cross-linked cable production line sealing ring as described in any one of claims 1-6.

8. The vertical cross-linked cable production system according to claim 7, characterized in that: It also comprises a shell (1), on which two of the above-mentioned sealing rings are arranged at intervals, and a water injection port (9) is arranged between the two above-mentioned sealing rings on the shell (1).

9. A nitrogen sealing method for vertical cross-linked cable production, characterized in that: This is achieved by using a vertical cross-linked cable production line sealing ring as described in any one of claims 1-6.

10. The nitrogen sealing method for vertical cross-linked cable production according to claim 9, characterized in that: The following steps are involved: S1. Put the housing (1) onto the outer side of the cable (11); S2, two vertical cross-linked cable production line sealing rings as described above are arranged at intervals on the housing (1); S3, installing a water injection port (9) between the two sealing rings; S4. Water is injected into the housing (1) through the water injection port (9), and the water pressure is greater than the nitrogen pressure.

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