A cable protection pipe plugging device and its application method and cable system

Abstract

The present invention discloses a cable protection tube plugging device and its application method and cable system. The present invention discloses a cable protection plugging device, comprising an annular plugging body for being sleeved on a cable and inserted into an external protection tube, the annular plugging body comprising a rigid cover plate and a deformable plugging body fixed on the rigid cover plate, the deformable plugging body having an undeformed first form and at least one deformed second form, the second form being larger than the first form for interference fit with the inner wall of the external protection tube in the plugging state. The present invention can realize reliable plugging of the cable and the external protection tube, is not prone to falling off and aging, has good reliability and safety, and is convenient for adjusting the deformation amount in the later stage to achieve reinforcement. The present invention can be applied to various forms of external protection tubes, including cable protection tubes and cable joint explosion-proof boxes, and can also be applied to cables of various types or sizes, and has the advantage of good versatility.

Description

Technical Field

[0001] The invention relates to cable auxiliary equipment, and in particular to a cable protection tube plugging device and an application method thereof and a cable system. Background Art

[0002] At present, at the cable terminal pole, in order to protect the cable, a cable protection tube is installed on the outside of the cable. After the cable protection tube is installed, a gap will be formed between the cable protection tube and the cable. In order to protect the gap, prevent foreign objects from entering and prevent moisture, the end of the cable protection tube is generally filled with fireproof mud. However, in actual use, the fireproof mud will fall off due to dehydration, aging and other reasons as the operation time increases, so that moisture enters from the port of the cable protection tube, and the cable protection tube cannot be effectively sealed. Summary of the invention

[0003] Technical problem to be solved by the present invention: In view of the above-mentioned problems of the prior art, a cable protection tube sealing device and its application method and cable system are provided. The present invention can achieve reliable sealing between the cable and the external protective tube, is not prone to falling off and aging, has good reliability and safety, and is convenient for adjusting the deformation amount at a later stage to achieve reinforcement.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A cable protection and sealing device comprises an annular sealing body for being sleeved on a cable and inserted into an external protection tube, the annular sealing body comprising a rigid cover plate and a deformable sealing body fixed on the rigid cover plate, the deformable sealing body having an undeformed first form and at least one deformed second form, the second form being larger than the first form so as to be used for interference fit with the inner wall of the external protection tube in the sealing state.

[0006] Optionally, an inner sealing ring is provided on the inner wall of the deformable sealing body, and an outer sealing ring is provided on the outer wall of the deformable sealing body.

[0007] Optionally, a cable sleeve for sleeved on the cable is provided in the middle of the rigid cover plate, and an inner sealing ring is provided on the inner wall of the cable sleeve.

[0008] Optionally, the edge of the rigid cover plate is provided with an outer tube sleeve arranged along the length direction of the cable, an inner sealing ring is provided on the inner wall of the outer tube sleeve, and an installation groove for clamping and fixing the external protective tube is formed between the inner wall of the outer tube sleeve and the outer wall of the deformable sealing body.

[0009] Optionally, the annular sealing body is composed of a plurality of arc segments arranged in a circumferential direction, and sealing gaskets are provided between adjacent arc segments.

[0010] Optionally, the deformable sealing body is provided with a deformation adjustment cavity arranged along the circumferential direction, and a plurality of arc-shaped segmented deformation adjustment cavities are interconnected to form an annular cavity. An arc-shaped adjustment block is provided in the deformation adjustment cavity, and a threaded adjustment bolt is provided on the rigid cover plate. The adjustment bolt is movably connected to the arc-shaped adjustment block or abuts against the arc-shaped adjustment block. The cross-sections of the deformation adjustment cavity and the arc-shaped adjustment block are both trapezoidal or triangular, and the position of the arc-shaped adjustment block in the deformation adjustment cavity is adjusted by the adjusting bolt. The inclined surface of the trapezoid or triangle is used to push the deformable sealing body made of flexible material to expand and deform to form a second shape larger than the initial first shape, so that it has an interference fit with the inner wall of the external protective tube in the sealing state.

[0011] Optionally, the annular sealing body comprises two arc segments in total, one end of the two arc segments are hingedly connected to each other via a connecting shaft, and the other end is provided with a connecting plate, and the connecting plates of the two arc segments are connected by bolts.

[0012] In addition, the present invention also provides an application method of the aforementioned cable protection and plugging device, comprising:

[0013] S1, two arc-shaped segments are placed on the cable;

[0014] S2, pushing the annular sealing body into the external protection tube so that the annular sealing body is in a first state;

[0015] S3, connecting and fixing the two arc-shaped segmented connecting plates by means of bolts, so that the annular sealing body and the cable are connected and fixed;

[0016] S4, adjusting the position of the arc-shaped adjustment block in the deformation adjustment cavity by adjusting the bolt, and using the trapezoidal or triangular inclined surface to push the deformable sealing body made of flexible material to expand and deform to form a second shape larger than the initial first shape, thereby having an interference fit with the inner wall of the external protective tube in the sealing state.

[0017] In addition, the present invention also provides a cable system, including a cable and a cable protection tube sleeved on the outside of the cable, and the aforementioned cable protection sealing device is provided between the two ends of the cable protection tube and the cable.

[0018] In addition, the present invention also provides a cable system, including a cable composed of multiple cable sections connected to each other, wherein the joints of adjacent cables are externally covered with a cable joint explosion-proof box, and the aforementioned cable protection and sealing device is provided between the two ends of the cable joint explosion-proof box and the cable.

[0019] Compared with the prior art, the cable protection and plugging device of the present invention mainly has the following advantages:

[0020] 1. The present invention includes an annular sealing body used to be sleeved on a cable and inserted into an external protective tube, the annular sealing body includes a rigid cover plate and a deformable sealing body fixed on the rigid cover plate, the deformable sealing body has an undeformed first form and at least one deformed second form, the second form is larger than the first form so as to be used for interference fit with the inner wall of the external protective tube in a sealing state, so that after being sleeved on the cable and inserted into the tube gap of the external protective tube, the cable and the external protective tube can be reliably sealed through deformation of the second form, and it is not easy to fall off or age, and has good reliability and safety.

[0021] 2. The deformable sealing body of the present invention has an undeformed first form and at least one deformed second form. Therefore, in the case of having a plurality of second forms of different sizes, it is convenient to adjust the deformation amount later to achieve reinforcement.

[0022] 3. The present invention can be applied to various forms of external protection tubes, including cable protection tubes and cable joint explosion-proof boxes, and can also be applied to cables of various types or sizes, and has the advantage of good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional structural diagram of a device according to an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the side structure of the device according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the application structure of the device according to an embodiment of the present invention, wherein a is a cable and b is an external protective tube.

[0026] Legend: 1. Annular sealing body; 101. Arc segment; 102. Sealing gasket; 103. Connecting shaft; 104. Connecting plate; 105. Bolt; 11. Rigid cover plate; 111. Adjusting bolt; 112. Cable casing; 113. Outer tube casing; 12. Deformable sealing body; 121. Deformation adjustment chamber; 122. Arc adjustment block; 13. Inner sealing ring; 14. Outer sealing ring. DETAILED DESCRIPTION

[0027] like Figure 1 , Figure 2 and Figure 3As shown, the cable protection and plugging device of this embodiment includes an annular plugging body 1 for being sleeved on the cable and inserted into the external protection tube, the annular plugging body 1 includes a rigid cover plate 11 and a deformable plugging body 12 fixed on the rigid cover plate 11, the deformable plugging body 12 has an undeformed first form and at least one deformed second form, the second form is larger than the first form so as to be used for interference fit with the inner wall of the external protection tube in the plugging state. The cable protection and plugging device of this embodiment can realize reliable plugging between the cable and the external protection tube, is not prone to falling off and aging, has good reliability and safety, and is convenient for adjusting the deformation amount in the later stage to achieve reinforcement. The present invention can be applied to various forms of external protection tubes, including cable protection tubes and cable joint explosion-proof boxes, and can also be applied to cables of various types or sizes, and has the advantage of good versatility. In this embodiment, the rigid cover plate 11 is made of fireproof material (such as fiberglass), and has corrosion resistance and high insulation strength.

[0028] like Figure 1 As shown, in order to achieve reliable and tight seams between the deformable sealing body 12 and the cable and the external protective tube, an inner sealing ring 13 is provided on the inner wall of the deformable sealing body 12 in this embodiment, and an outer sealing ring 14 is provided on the outer wall of the deformable sealing body 12.

[0029] like Figure 1 As shown, as an optional implementation, in order to enhance the protection effect on the cable and further improve the reliability of the seal between the deformable sealing body 12 and the cable, in this embodiment, a cable sleeve 112 for being sleeved on the cable is provided in the middle of the rigid cover plate 11, and an inner sealing ring 13 is provided on the inner wall of the cable sleeve 112.

[0030] like Figure 1 As shown, as an optional implementation, in order to enhance the protection effect on the cable and further improve the reliability of the seal between the deformable sealing body 12 and the external protective tube, in this embodiment, an outer tube sleeve 113 arranged along the length direction of the cable is provided on the edge of the rigid cover plate 11, and an inner sealing ring 13 is provided on the inner wall of the outer tube sleeve 113, and an installation groove for clamping and fixing the external protective tube is formed between the inner wall of the outer tube sleeve 113 and the outer wall of the deformable sealing body 12.

[0031] Undoubtedly, the annular sealing body 1 of the cable protection and sealing device of this embodiment can adopt an integrated structure and be installed by being sleeved on the cable. However, considering that the cable length is relatively long in actual operation, this sleeve-type installation method has a large friction with the cable and causes installation difficulties. In order to simplify the installation and improve the installation efficiency, the annular sealing body 1 in this embodiment is composed of a plurality of arc segments 101 arranged in a circumferential direction, and sealing pads 102 are provided between adjacent arc segments 101, so that both disassembly and splicing can be achieved and reliable sealing can be ensured.

[0032] In this embodiment, the deformable sealing body 12 is fixed to the rigid cover plate 11 by bonding.

[0033] The deformable sealing body 12 can adopt the desired deformation method as needed. For example, a driving element such as a cylinder, an oil cylinder, or a motor can be used to drive the deformable sealing body 12 to deform so that it has an undeformed first form and at least one deformed second form, and the second form is larger than the first form so as to be used for interference fit with the inner wall of the external protection tube in the sealing state; in addition, the structure of the deformable sealing body 12 can also be manually adjusted so that it has an undeformed first form and at least one deformed second form, and the second form is larger than the first form so as to be used for interference fit with the inner wall of the external protection tube in the sealing state. For example, as an optional embodiment, in this embodiment, the deformable sealing body 12 is provided with a deformation adjustment cavity 121 arranged along the circumferential direction, the deformation adjustment cavities 121 of the multiple arc segments 101 are interconnected to form an annular cavity, and an arc adjustment block 122 is provided in the deformation adjustment cavity 121 (in this embodiment, the arc adjustment blocks 122 of the multiple arc segments 101 are spliced ​​to form a continuous annular structure to achieve uniform force on the deformation adjustment cavity 121), and a threaded adjustment block 122 is provided on the rigid cover plate 11. The joint bolt 111, the adjusting bolt 111 is movably connected with the arc-shaped adjusting block 122 or contacts the arc-shaped adjusting block 122. The cross-sections of the deformation adjusting cavity 121 and the arc-shaped adjusting block 122 are both trapezoidal, which are used to adjust the position of the arc-shaped adjusting block 122 in the deformation adjusting cavity 121 through the adjusting bolt 111. The inclined surface of the trapezoid is used to push the deformable plugging body 12 made of a flexible material to expand and deform to form a second shape larger than the initial first shape, so as to achieve an interference fit with the inner wall of the external protective tube in the blocked state. In this embodiment, the trapezoid of the aforementioned cross-section is an isosceles trapezoid. In addition, an unequal trapezoid, a right-angled trapezoid, or a triangle can also be used. As long as there is an inclined surface that can push the deformable plugging body 12 made of a flexible material to expand and deform to form a second shape larger than the initial first shape, an interference fit with the inner wall of the external protective tube in the blocked state can be achieved.

[0034] The number of arc segments 101 included in the annular plugging body 1 can be determined as required. Figure 2 As shown, as an optional implementation, the annular sealing body 1 in this embodiment includes two arc segments 101, one end of the two arc segments 101 is hingedly connected to each other through a connecting shaft 103, and the other end is provided with a connecting plate 104, the connecting plates 104 of the two arc segments 101 are connected by bolts 105, one end is hinged and the other end is bolted, so the installation is convenient and quick.

[0035] In addition, this embodiment also provides an application method of the aforementioned cable protection and plugging device, including:

[0036] S1, sleeve the two arc segments 101 onto the cable;

[0037] S2, pushing the annular sealing body 1 into the external protection tube so that the annular sealing body 1 is in a first state;

[0038] S3, connecting and fixing the connecting plates 104 of the two arc-shaped segments 101 by means of bolts 105, so that the annular sealing body 1 and the cable remain connected and fixed;

[0039] S4, adjust the position of the arc-shaped adjustment block 122 in the deformation adjustment cavity 121 by adjusting the bolt 111, and use the trapezoidal or triangular inclined surface to push the deformable sealing body 12 made of flexible material to expand and deform to form a second shape larger than the initial first shape, so as to have an interference fit with the inner wall of the external protective tube in the sealing state.

[0040] In addition, see Figure 3 This embodiment also provides a cable system, including a cable (such as Figure 3 a) and a cable protection tube (as shown in Figure 3 As shown in b), the aforementioned cable protection sealing device is provided between the two ends of the cable protection tube and the cable.

[0041] In addition, this embodiment also provides a cable system, including a cable composed of multiple cable sections connected to each other, the joints of adjacent cables are covered with cable joint explosion-proof boxes, and the aforementioned cable protection sealing devices are provided between the two ends of the cable joint explosion-proof boxes and the cables.

[0042] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A cable protection and plugging device, characterized in that: The invention comprises an annular sealing body (1) for being sleeved on a cable and inserted into an external protective tube, the annular sealing body (1) comprising a rigid cover plate (11) and a deformable sealing body (12) fixed on the rigid cover plate (11), the deformable sealing body (12) having an undeformed first form and at least one deformed second form, the second form being larger than the first form so as to be interference fit with the inner wall of the external protective tube in a sealing state; The annular sealing body (1) is composed of a plurality of arc-shaped segments (101) arranged in a circumferential direction, and sealing pads (102) are provided between adjacent arc-shaped segments (101); The deformable sealing body (12) is provided with a deformation adjustment cavity (121) arranged along the circumferential direction. The deformation adjustment cavities (121) of the plurality of arc-shaped segments (101) are interconnected to form an annular cavity. The deformation adjustment cavity (121) is provided with an arc-shaped adjustment block (122). The rigid cover plate (11) is provided with a threaded adjustment bolt (111). The adjustment bolt (111) is movably connected to the arc-shaped adjustment block (122) or abuts against the arc-shaped adjustment block (122). The cross-sections of the deformation adjustment cavity (121) and the arc-shaped adjustment block (122) are both trapezoidal or triangular, and are used to adjust the position of the arc-shaped adjustment block (122) in the deformation adjustment cavity (121) by means of the adjustment bolt (111). The trapezoidal or triangular inclined surface is used to push the deformable sealing body (12) made of a flexible material to expand and deform to form a second shape larger than the initial first shape, so as to achieve interference fit with the inner wall of the external protection tube in the blocking state. The annular blocking body (1) comprises two arc-shaped segments (101) in total. One end of the two arc-shaped segments (101) is hingedly connected to each other via a connecting shaft (103), and the other end is provided with a connecting plate (104). The connecting plates (104) of the two arc-shaped segments (101) are connected via bolts (105).

2. The cable protection and plugging device according to claim 1, characterized in that: An inner sealing ring (13) is provided on the inner wall of the deformable sealing body (12), and an outer sealing ring (14) is provided on the outer wall of the deformable sealing body (12).

3. The cable protection and plugging device according to claim 2, characterized in that: A cable sleeve (112) for being sleeved on a cable is provided in the middle of the rigid cover plate (11), and an inner sealing ring (13) is provided on the inner wall of the cable sleeve (112).

4. The cable protection and plugging device according to claim 3, characterized in that: An outer tube sleeve (113) arranged along the length direction of the cable is provided at the edge of the rigid cover plate (11), an inner sealing ring (13) is provided on the inner wall of the outer tube sleeve (113), and a mounting groove for clamping and fixing the external protective tube is formed between the inner wall of the outer tube sleeve (113) and the outer wall of the deformable sealing body (12).

5. An application method of the cable protection and plugging device according to claim 1, characterized in that: include: S1, sleeve the two arc segments (101) onto the cable; S2, pushing the annular sealing body (1) into the external protection tube so that the annular sealing body (1) is in a first state; S3, connecting and fixing the connecting plates (104) of the two arc-shaped segments (101) by means of bolts (105), so that the annular sealing body (1) and the cable remain connected and fixed; S4, adjusting the position of the arc-shaped adjustment block (122) in the deformation adjustment cavity (121) by adjusting the bolt (111), and using the trapezoidal or triangular inclined surface to push the deformable plugging body (12) made of a flexible material to expand and deform to form a second shape larger than the initial first shape, thereby forming an interference fit with the inner wall of the external protection tube in the plugging state.

6. A cable system, comprising a cable and a cable protection tube sleeved on the outside of the cable, characterized in that: A cable protection and sealing device as claimed in any one of claims 1 to 4 is provided between the two ends of the cable protection tube and the cable.

7. A cable system, comprising a cable consisting of a plurality of cable segments connected to each other, characterized in that: The outer sleeves of the joints of adjacent cables are provided with cable joint explosion-proof boxes, and the cable protection and blocking device according to any one of claims 1 to 4 is provided between the two ends of the cable joint explosion-proof box and the cables.

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