Cable clamping device and cable buffer layer repairing system and method

Abstract

The invention discloses a cable clamping device and a cable buffer layer repairing system and method.The cable clamping device comprises a clamping piece, a cable passing space is defined by the clamping piece, the clamping piece is further provided with a repairing material channel communicated with the cable passing space, and a port of the end, close to the cable passing space, of the repairing material channel is a first port; the first sealing ring and the second sealing ring are arranged in the wire passing space and are in sealing connection with the inner wall of the clamping piece; the projection of the first port on the datum plane is located between the projection of the first sealing ring on the datum plane and the projection of the second sealing ring on the datum plane; wherein the cable passing space is used for allowing a to-be-repaired cable to pass through; the cable to be repaired comprises an inner layer structure, an outer layer structure and a buffer layer located between the inner layer structure and the outer layer structure. The first sealing ring is used for being in sealing fit with the wall face of the outermost side of the inner layer structure, and the second sealing ring is used for being in sealing fit with the wall face of the outermost side of the outer layer structure.

Description

Technical Field

[0001] The present invention relates to the technical field of cable repair, and in particular to a cable clamping device, a cable buffer layer repair system and a method. Background Art

[0002] With the development of urban construction, the demand for urban electricity is increasing day by day. Urban power grid construction is an important part of urban construction, and high-voltage cross-linked polyethylene cables are the mainstream choice for urban high-voltage power cables.

[0003] However, as the service life increases, high-voltage cross-linked polyethylene cables are prone to body breakdown failures. After dissection, it was found that the internal buffer layer (located between the metal sheath and the insulating shielding layer) of some faulty cables had traces of ablation. The purpose of the buffer layer is to form a good electrical connection between the metal sheath and the insulating shielding layer. Studies have found that the unit volume resistivity of the buffer layer will increase significantly under the influence of external electric fields, moisture, pressure and other factors, thus becoming an insulating medium, resulting in the problem of local field strength distortion, which will lead to the phenomenon of cable body breakdown.

[0004] In the related art, some cable buffer layer repair methods use a needle to insert into the cable and inject repair liquid into the buffer layer of the cable to repair the buffer layer. However, the repair liquid that enters the buffer layer through the needle will diffuse around the needle. A part of it can enter the damaged section of the buffer layer to repair the buffer layer, while a part of it diffuses in the opposite direction of the damaged section of the buffer layer, resulting in waste. In addition, some solutions will use a vacuum pump to evacuate the damaged section of the buffer layer so that the repair liquid entering the buffer layer flows to the damaged section of the buffer layer as much as possible. However, it is still difficult to avoid the buffer from diffusing in the opposite direction of the damaged section of the buffer layer. In addition, if the vacuum pump fails or is turned on a little late, more repair liquid will diffuse in the opposite direction of the damaged section of the buffer layer, and the reliability is poor. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cable clamping device, a cable buffer layer repair system and a method, which can reduce the loss of repair materials.

[0006] According to a first aspect of the present invention, the cable clamping device comprises: a clamping member, the clamping member defines a wire passing space, and the clamping member is further provided with a repair material channel connected to the wire passing space, and a port of the repair material channel close to one end of the wire passing space is a first port; a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are both arranged in the wire passing space and sealedly connected to the inner wall of the clamping member; a plane perpendicular to the orientation of the first port is defined as a reference plane, and a projection of the first port on the reference plane is located between a projection of the first sealing ring on the reference plane and a projection of the second sealing ring on the reference plane;

[0007] Among them, the line passing space is used for the cable to be repaired to pass through; the cable to be repaired includes an inner layer structure, an outer layer structure and a buffer layer located between the inner layer structure and the outer layer structure; the first sealing ring is used to seal with the outermost wall of the inner layer structure, and the second sealing ring is used to seal with the outermost wall of the outer layer structure.

[0008] The cable clamping device according to the embodiment of the present invention has at least the following beneficial effects:

[0009] Before use, the cable clamping device of the present invention needs to pre-treat the cable to be repaired. Specifically, the buffer layer of the cable to be repaired includes the section a to be repaired (that is, the damaged section). The outer layer structure and the buffer layer near the end of the section a to be repaired need to be peeled off in advance to expose the inner layer structure. When the cable clamping device clamps the cable to be repaired, the first sealing ring needs to be fitted with the outermost wall of the exposed inner layer structure, and the second sealing ring needs to be fitted with the outermost wall of the outer layer structure located outside the section a to be repaired.

[0010] It is understandable that when the repair material enters the wire-passing space through the repair material channel on the clamping member, since the first sealing ring is sealed between the outermost wall of the exposed inner layer structure and the inner wall of the clamping member, the first sealing ring can prevent the repair material from flowing back to the section to be repaired a after entering the wire-passing space and causing losses, which can save the amount of repair material and save costs. In addition, since the second sealing ring fits the outermost wall of the outer layer structure located outside the section to be repaired a, the second sealing ring can also reduce the losses caused by leakage of the repair material.

[0011] According to some embodiments of the present invention, the clamping member is provided with two repair material channels, and the two repair material channels are arranged opposite to each other.

[0012] According to some embodiments of the present invention, the clamping member includes two clamping parts, and the two clamping parts are detachably connected.

[0013] According to some embodiments of the present invention, the first sealing ring includes at least two independent first sealing parts, and the at least two first sealing parts cooperate to form an annular structure.

[0014] According to some embodiments of the present invention, the second sealing ring includes at least two independent second sealing parts, and the at least two second sealing parts cooperate to form an annular structure.

[0015] According to the second aspect of the present invention, the cable buffer layer repair system includes an injection system, which includes an injection device and a first cable clamping device; wherein the first cable clamping device is the cable clamping device of the above embodiment, and the discharge port of the injection device is connected to the repair material channel of the first cable clamping device.

[0016] The cable buffer layer repair system according to the embodiment of the present invention has at least the following beneficial effects:

[0017] Before using the cable buffer repair system of the present invention, the cable to be repaired needs to be pre-processed. Specifically, the outer layer structure and buffer layer near the end of the section to be repaired a need to be peeled off in advance to expose the inner layer structure; then the first cable clamping device a is used to clamp the cable to be repaired. When the first cable clamping device a is used to clamp the cable to be repaired, the first sealing ring needs to be fitted with the outermost wall of the exposed inner layer structure, and the second sealing ring needs to be fitted with the outermost wall of the outer layer structure located outside the section to be repaired a; then, the first injection device is used to inject the repair liquid into the cable buffer layer; during the process of injecting the repair liquid, since the first sealing ring is sealed between the outermost wall of the exposed inner layer structure and the inner wall of the clamping member, the first sealing ring can prevent the repair material from flowing back to the section to be repaired a after entering the wire passing space and causing losses, which can save the amount of repair liquid and save costs. In addition, since the second sealing ring is fitted with the outermost wall of the outer layer structure located outside the section to be repaired a, the second sealing ring can also reduce the losses caused by leakage of the repair liquid.

[0018] According to some embodiments of the present invention, the injection device includes a material storage container and a delivery source connected to the material storage container, and the material outlet of the material storage container is connected to the repair material channel of the first cable clamping device;

[0019] The conveying source is used to drive the repair material in the material storage container into the repair material channel of the first cable clamping device.

[0020] According to some embodiments of the present invention, the material injection device further includes a dehumidifying component disposed in the material storage container.

[0021] According to some embodiments of the present invention, the cable buffer layer repair system further comprises a recovery system, the recovery system comprising a recovery device and a second cable clamping device;

[0022] Wherein, the cable clamping device is the cable clamping device of the above embodiment, and the return material port of the recovery device is connected to the repair material channel of the second cable clamping device.

[0023] The cable buffer layer repair method according to the third aspect of the present invention is applied to the cable buffer layer repair system of the above embodiment, and the cable buffer layer repair method includes:

[0024] Pre-treating the cable to be repaired so that the outer layer structure and the buffer layer near both ends of the to-be-repaired section of the buffer layer of the cable to be repaired are peeled off so that the inner layer structure is exposed;

[0025] The first cable clamping device is used to clamp the cable near one end of the section to be repaired, and the second cable clamping device is used to clamp the cable near the other end of the section to be repaired, so that the first sealing ring of the first cable clamping device fits with the outermost wall surface of the exposed inner layer structure, the second sealing ring of the first cable clamping device fits with the outermost wall surface of the outer layer structure located outside the section to be repaired, the first sealing ring of the second cable clamping device fits with the outermost wall surface of the exposed inner layer structure, and the second sealing ring of the second cable clamping device fits with the outermost wall surface of the outer layer structure located outside the section to be repaired;

[0026] The injection device and the recovery device are started.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 It is a schematic cross-sectional view of the cable clamping device according to the first embodiment of the present invention;

[0030] Figure 2 This is a schematic structural diagram of a cable clamping device according to Embodiment 1 of the present invention;

[0031] Figure 3 This is a schematic structural diagram of a cable buffer layer repair system according to a second embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of a cable buffer layer repair system according to Embodiment 3 of the present invention.

[0033] Figure Number:

[0034] 10. Cable to be repaired; 11. Inner layer structure; 12. Outer layer structure; 13. Buffer layer; 13a. Section to be repaired;

[0035] 100, cable clamping device; 100a, first cable clamping device; 100b, second cable clamping device; 100c, third cable clamping device; 100d, fourth cable clamping device; 110, clamping member; 1101, wire passing space; 1102, repair material channel; 1102a, first port; 1102b, second port; 111, clamping part; 120, first sealing ring; 121, first sealing part; 130, second sealing ring; 131, second sealing part; 140, locking member;

[0036] 200, first injection system; 210, first injection device; 211, grouting machine; 212, first storage container; 220, first pipeline;

[0037] 300, first recovery system; 310, first recovery device; 311, first vacuum pump; 312, first recovery container; 320, second pipeline;

[0038] 400, second injection system; 410, second injection device; 411, booster pump; 412, second storage container; 413, dehumidification element; 420, third pipeline;

[0039] 500, second recovery system; 510, second recovery device; 511, second vacuum pump; 512, second recovery container; 520, fourth pipeline. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Embodiment 1:

[0044] like Figure 1 , Figure 2 As shown, a cable clamping device 100 provided in Embodiment 1 of the present invention is used to clamp a cable 10 to be repaired, wherein the cable may be a high-voltage cross-linked polyethylene cable, which includes an inner layer structure 11, an outer layer structure 12 and a buffer layer 13 located between the inner layer structure 11 and the outer layer structure 12, and the cable 10 to be repaired refers to a cable whose buffer layer 13 is damaged and needs to be repaired.

[0045] It should be noted that the inner layer structure 11 of the cable is sleeved by the buffer layer 13, and the insulating shielding layer is closest to the buffer layer 13; the outer layer structure 12 is sleeved outside the buffer layer 13, and the metal sheath is closest to the buffer layer 13; in other words, the buffer layer 13 is located between the insulating shielding layer and the metal sheath.

[0046] like Figure 1 As shown, the cable clamping device 100 includes a clamping member 110 , a first sealing ring 120 and a second sealing ring 130 .

[0047] The clamping member 110 defines a wire passing space 1101, and the clamping member 110 is also provided with a repair material channel 1102 connected to the wire passing space 1101, the port of the repair material channel 1102 close to the wire passing space 1101 is a first port 1102a, and the port of the repair material channel 1102 away from the wire passing space 1101 is a second port 1102b.

[0048] It can be understood that the clamping member 110 is arranged to form a wire passing space 1101, and the wire passing space 1101 is used for the cable 10 to be repaired to pass through; the repair material channel 1102 passes through the inner and outer side walls of the clamping member 110 and is connected to the wire passing space 1101, wherein the port of the repair material channel 1102 formed on the inner wall of the clamping member 110 is the first port 1102a, and the port of the repair material channel 1102 formed on the outer wall of the clamping member 110 is the second port 1102b.

[0049] It should be noted that the clamping member 110 is a structure that can be opened. When the clamping member 110 is in the open state, the clamping member 110 can approach the cable 10 to be repaired from the side and be sleeved outside the cable, thereby clamping the cable.

[0050] Combination Figure 1 and Figure 2 In some embodiments, the clamping member 110 includes two clamping parts 111, which are two separable structures. The two clamping parts 111 can be respectively put on the cable 10 to be repaired from the top and bottom, and then fixed by the locking member 140, so as to clamp the cable 10 to be repaired. The locking member 140 can be a bolt and a nut.

[0051] In some other embodiments, the clamping member 110 includes two clamping parts 111, one end of the two clamping parts 111 is rotatably connected by a rotating shaft, the other ends of the two clamping parts 111 can be close to or separated from each other, the two clamping parts 111 can be put on the outside of the cable 10 to be repaired, and the other ends of the two clamping parts 111 can be locked by the locking member 140 after being closed.

[0052] The first sealing ring 120 and the second sealing ring 130 are both disposed in the wire passing space 1101 and are sealed to the inner wall of the clamping member 110 .

[0053] Specifically, the first sealing ring 120 and the second sealing ring 130 are arranged at intervals along the axial direction of the wire space 1101, and the outer wall of the first sealing ring 120 and the outer wall of the second sealing ring 130 are both in contact with the inner wall of the clamping member 110 to achieve sealing.

[0054] Furthermore, a plane perpendicular to the direction of the first port 1102a of the repair material channel 1102 is defined as a reference plane, and the projection of the first port 1102a on the reference plane is located between the projection of the first sealing ring 120 on the reference plane and the projection of the second sealing ring 130 on the reference plane.

[0055] Before use, the cable clamping device 100 of the present invention needs to pre-treat the cable 10 to be repaired. Specifically, the buffer layer 13 of the cable 10 to be repaired includes a section 13a to be repaired (that is, a damaged section). The outer layer structure 12 and the buffer layer 13 near the end of the section 13a to be repaired need to be peeled off in advance to expose the inner layer structure 11. When the cable clamping device 100 clamps the cable 10 to be repaired, the first sealing ring 120 needs to be in contact with the outermost wall of the exposed inner layer structure 11, and the second sealing ring 130 needs to be in contact with the outermost wall of the outer layer structure 12 located outside the section 13a to be repaired.

[0056] It is understandable that when the repair material enters the wire-passing space 1101 through the repair material channel 1102 on the clamp 110, since the first sealing ring 120 is sealed between the outermost wall of the exposed inner layer structure 11 and the inner wall of the clamp 110, the first sealing ring 120 can prevent the repair material from flowing back to the section to be repaired 13a after entering the wire-passing space 1101 and causing losses, which can save the amount of repair material and save costs. In addition, since the second sealing ring 130 is in contact with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a, the second sealing ring 130 can also reduce the losses caused by leakage of the repair material.

[0057] like Figure 1 As shown, the first sealing ring 120 includes at least two independent first sealing parts 121, and at least two first sealing parts 121 cooperate to form an annular structure; in this way, each first sealing part 121 can be sequentially arranged on the cable to be repaired 10, so as to achieve sealing of the cable to be repaired 10 at various positions along its circumference.

[0058] Specifically, there are two first sealing portions 121 , each of which is semicircular. The two first sealing portions 121 can be arranged one above the other on the upper and lower sides of the cable 10 to be repaired, and then fixed and sealed under the squeezing action of the clamping member 110 .

[0059] Furthermore, the second sealing ring 130 includes at least two independent second sealing parts 131, and at least two second sealing parts 131 cooperate to form an annular structure; thus, each second sealing part 131 can be sequentially arranged on the cable 10 to be repaired, thereby achieving sealing at various positions along the circumference of the cable 10 to be repaired.

[0060] Specifically, there are two second sealing portions 131 , each of which is semicircular. The two second sealing portions 131 can be arranged one above the other on the upper and lower sides of the cable 10 to be repaired, and then fixed and sealed under the squeezing action of the clamping member 110 .

[0061] like Figure 1 As shown, further, the clamping member 110 is provided with two repair material channels 1102, and the two repair material channels 1102 are arranged opposite to each other. Specifically in this embodiment, the two repair material channels 1102 are respectively arranged on the two clamping parts 111, and when the clamping member 110 is in a state of clamping the cable, the two repair material channels 1102 are arranged opposite to each other. In this way, by injecting the repair material into the to-be-repaired section 13a through the two repair material channels 1102 at the same time, the feeding speed can be increased, thereby improving the repair efficiency. In addition, the repair material enters the buffer layer 13 through the two repair material channels 1102 respectively, which can improve the uniformity of the repair material entering the buffer layer 13.

[0062] Embodiment 2:

[0063] like Figure 3 As shown, the cable buffer layer repair system provided in the second embodiment of the present invention includes a first injection system 200, wherein the first injection system 200 includes a first injection device 210 and a first cable clamping device 100a, wherein the first cable clamping device 100a is the cable clamping device 100 of the first embodiment, and the discharge port of the first injection device 210 is connected to the repair material channel 1102 of the first cable clamping device 100a.

[0064] It can be understood that the first injection device 210 is connected to the first pipe 220, and one end of the first pipe 220 away from the first injection device 210 is connected to the first cable clamping device 100a, and the first pipe 220 is used to connect the discharge port of the first injection device 210 with the repair material channel 1102 of the first cable clamping device 100a. The first injection device 210 can inject the repair liquid into the repair material channel 1102 through the first pipe 220, so that the repair liquid enters the buffer layer 13 to be repaired to repair the buffer layer 13.

[0065] It can be understood that, before using the cable buffer layer repair system of the present invention, the cable to be repaired 10 needs to be pre-processed. Specifically, the outer layer structure 12 and the buffer layer 13 near the end of the repair section 13a need to be peeled off in advance to expose the inner layer structure 11. Then, the first cable clamping device 100a is used to clamp the cable to be repaired 10. When the first cable clamping device 100a clamps the cable to be repaired 10, the first sealing ring 120 needs to be in contact with the outermost wall of the exposed inner layer structure 11, and the second sealing ring 120 needs to be in contact with the outermost wall of the exposed inner layer structure 11. The sealing ring 130 is fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a; then, the repair liquid is injected into the cable buffer layer 13 using the first injection device 210; during the process of injecting the repair liquid, since the first sealing ring 120 is sealed between the outermost wall of the exposed inner layer structure 11 and the inner wall of the clamping member 110, the first sealing ring 120 can prevent the repair material from flowing back to the section to be repaired 13a after entering the wire passing space 1101 and causing losses, which can save the amount of repair liquid and save costs. In addition, since the second sealing ring 130 is fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a, the second sealing ring 130 can also reduce the losses caused by leakage of the repair liquid.

[0066] The first injection device 210 includes a grouting machine 211 and a first material storage container 212 connected to the grouting machine 211. The first material storage container 212 is connected to the first cable clamping device 100a through a first pipe 220, and the first pipe 220 is used to connect the discharge port of the first material storage container 212 with the repair material channel 1102 of the first cable clamping device 100a. The grouting machine 211 can drive the repair liquid in the first material storage container 212 into the first pipe 220, and then flow into the repair material channel 1102 of the first cable clamping device 100a through the first pipe 220.

[0067] It should be noted that the repair liquid is a semi-conductive liquid, which can be a mixture of dimethyl silicone oil + carbon black.

[0068] Furthermore, the cable buffer layer repair system further includes a first recycling system 300, wherein the first recycling system 300 includes a first recycling device 310 and a second cable clamping device 100b, and the second cable clamping device 100b is also the cable clamping device 100 in Example 1. The return material port of the first recycling device 310 is connected to the repair material channel 1102 of the second cable clamping device 100b.

[0069] It can be understood that the first recovery device 310 is connected to the second pipe 320, and the end of the second pipe 320 away from the first recovery device 310 is connected to the second cable clamping device 100b, and the second pipe 320 is used to connect the return port of the first recovery device 310 with the repair material channel 1102 of the second cable clamping device 100b.

[0070] It can be understood that the cable buffer layer repair system of the present invention needs to be pre-processed before use. Specifically, the outer layer structure 12 and the buffer layer 13 near the two ends of the repair section 13a need to be peeled off in advance to expose the inner layer structure 11; then the first cable clamping device 100a is used to clamp one end of the repair section 13a, and the second cable clamping device 100b is used to clamp the other end of the repair section 13a; specifically, when the first cable clamping device 100a and the second cable clamping device 100b clamp the cable 10 to be repaired, the respective first sealing rings 120 need to be in contact with the exposed inner layer structure 11. The outermost wall of the inner layer structure 11 is fitted with each other, and the respective second sealing rings 130 are fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a; then, the repair liquid is injected into the cable buffer layer 13 by using the first injection device 210. During the process of injecting the repair liquid, since the first sealing ring 120 of the first cable clamping device 100a is sealed and arranged between the outermost wall of the exposed inner layer structure 11 and the inner wall of the clamping member 110, the first sealing ring 120 of the first cable clamping device 100a can prevent the repair material from flowing back to the section to be repaired 13a after entering the wire passing space 1101 and causing loss, which can save the amount of repair material and save costs. In addition, since the second sealing ring 130 of the first cable clamping device 100a is in contact with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a, the second sealing ring 130 can also reduce the loss caused by the leakage of the repair material; as the repair liquid is injected, the repair liquid will flow to the position of the second cable clamping device 100b, and then be recovered into the first recovery device 310 through the repair material channel 1102 of the second cable clamping device 100b; wherein, the first sealing ring 120 and the second sealing ring 130 of the second cable clamping device 100b can play a sealing role to prevent the repair liquid flowing out of the section to be repaired 13a from continuing to flow to the buffer layer at other positions and causing losses.

[0071] The first recovery device 310 includes a first vacuum pump 311 and a first recovery container 312 connected to the first vacuum pump 311. The first recovery container 312 is connected to the second cable clamping device 100b through a second pipe 320. The second pipe 320 is used to connect the return port of the first recovery container 312 with the repair material channel 1102 of the second cable clamping device 100b. The first vacuum pump 311 can evacuate the section 13a to be repaired of the buffer layer 13, so that the repair liquid can flow toward the section 13a to be repaired, and the excess buffer is recovered into the first recovery container 312.

[0072] The present invention also provides a cable buffer layer repair method using the cable buffer layer repair system in the third embodiment, which comprises the following steps:

[0073] S100, pre-processing the cable 10 to be repaired.

[0074] Specifically, the outer layer structure 12 and the buffer layer 13 near both ends of the cable section 13 a to be repaired are peeled off in advance to expose the inner layer structure 11 .

[0075] S200: Clamp the cable near one end of the section to be repaired 13a using the first cable clamping device 100a, and clamp the cable near the other end of the section to be repaired 13a using the second cable clamping device 100b.

[0076] Specifically, when the first cable clamping device 100a clamps the cable 10 to be repaired, its first sealing ring 120 needs to fit with the outermost wall of the exposed inner layer structure 11, and its second sealing ring 130 needs to fit with the outermost wall of the outer layer structure 12 located outside the section 13a to be repaired; when the second cable clamping device 100b clamps the cable 10 to be repaired, its first sealing ring 120 needs to fit with the outermost wall of the exposed inner layer structure 11, and its second sealing ring 130 needs to fit with the outermost wall of the outer layer structure 12 located outside the section 13a to be repaired.

[0077] S300 , starting the first injection system 200 and the first recovery system 300 .

[0078] Specifically, when the first injection system 200 and the first recovery system 300 are started, the repair liquid will be injected into the cable buffer layer 13. As the repair liquid is injected, the repair liquid will flow to the position of the second cable clamping device 100b, and then be recovered into the first recovery system 300 through the repair material channel 1102 of the second cable clamping device 100b.

[0079] S400 , closing the first injection system 200 and the first recovery system 300 , and waiting for the repairing liquid to repair the buffer layer 13 .

[0080] S500, remove the entire cable buffer repair system from the cable.

[0081] Embodiment three:

[0082] like Figure 4 As shown, the cable buffer layer repair system provided in Embodiment 3 of the present invention comprises a second injection system 400, wherein the second injection system 400 comprises a second injection device 410 and a third cable clamping device 100c, wherein the third cable clamping device 100c is the cable clamping device 100 of Embodiment 1, and the discharge port of the second injection device 410 is connected to the repair material channel 1102 of the third cable clamping device 100c.

[0083] It can be understood that the second injection device 410 is connected to a third pipe 420, and one end of the third pipe 420 away from the second injection device 410 is connected to the third cable clamping device 100c, and the third pipe 420 is used to connect the discharge port of the second injection device 410 with the repair material channel 1102 of the third cable clamping device 100c. The second injection device 410 can inject graphite powder into the repair material channel 1102 through the third pipe 420, and the graphite powder will enter the buffer layer 13 to be repaired to repair the buffer layer 13.

[0084] It can be understood that the cable buffer layer repair system of the present invention needs to pre-treat the cable 10 to be repaired before use. Specifically, the outer layer structure 12 and the buffer layer 13 near the end of the repair section 13a need to be peeled off in advance to expose the inner layer structure 11; and then the third cable clamping device 100c is used to clamp the cable 10 to be repaired. When the third cable clamping device 100c clamps the cable 10 to be repaired, the first sealing ring 120 needs to be in contact with the outermost wall of the exposed inner layer structure 11. The second sealing ring 130 is fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a; then, the first injection device 210 is used to inject graphite powder into the cable buffer layer 13. During the process of injecting graphite powder, since the first sealing ring 120 is sealed between the outermost wall of the exposed inner layer structure 11 and the inner wall of the clamping member 110, the first sealing ring 120 can prevent the repair material from flowing in the reverse direction after entering the wire passing space 1101 and causing losses, which can save the amount of repair material and save costs. In addition, since the second sealing ring 130 is fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a, the second sealing ring 130 can also reduce the losses caused by leakage of the repair material.

[0085] The second injection device 410 includes a booster pump 411 and a second material storage container 412 connected to the booster pump 411. The second material storage container 412 is connected to the third cable clamping device 100c through a third pipe 420. The third pipe 420 is used to connect the discharge port of the second material storage container 412 with the repair material channel 1102 of the third cable clamping device 100c. The booster pump 411 can drive the graphite powder in the second material storage container 412 into the third pipe 420, and then enter the repair material channel 1102 of the third cable clamping device 100c through the third pipe 420.

[0086] Furthermore, the second injection device 410 further includes a dehumidifying component 413 disposed on the second material storage container 412 , wherein the dehumidifying component 413 is a heater, which can dehumidify the graphite powder in the second material storage container 412 .

[0087] Furthermore, the cable buffer layer repair system further includes a second recycling system 500, wherein the second recycling system 500 includes a second recycling device 510 and a fourth cable clamping device 100d, and the fourth cable clamping device 100d is also the cable clamping device 100 in Example 1. The return material port of the second recycling device 510 is connected to the repair material channel 1102 of the fourth cable clamping device 100d.

[0088] It can be understood that the second recovery device 510 is connected to the fourth pipe 520, and the end of the fourth pipe 520 away from the second recovery device 510 is connected to the fourth cable clamping device 100d, and the fourth pipe 520 is used to connect the return material port of the second recovery device 510 with the repair material channel 1102 of the fourth cable clamping device 100d.

[0089] It can be understood that, before using the cable buffer layer repair system of the present invention, the cable to be repaired 10 needs to be pre-processed. Specifically, the outer layer structure 12 and the buffer layer 13 near the two ends of the repair section 13a need to be peeled off in advance to expose the inner layer structure 11; and then the third cable clamping device 100c is used to clamp one end of the repair section 13a, and the fourth cable clamping device 100d is used to clamp the other end of the repair section 13a; specifically, when the third cable clamping device 100c and the fourth cable clamping device 100d clamp the cable to be repaired 10, the respective first sealing rings 1 20 is fitted with the outermost wall of the exposed inner layer structure 11, and the respective second sealing rings 130 are fitted with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a; thereafter, graphite powder is injected into the cable buffer layer 13 by means of the second injection device 410. During the process of injecting graphite powder, since the first sealing ring 120 is sealed between the outermost wall of the exposed inner layer structure 11 and the inner wall of the clamping member 110, the first sealing ring 120 can prevent the graphite powder from flowing back to the section to be repaired 13a after entering the wire passing space 1101 and causing loss, thereby saving the amount of graphite powder flowing back to the section to be repaired 13a and saving costs. In addition, since the second sealing ring 130 is in contact with the outermost wall of the outer layer structure 12 located outside the section to be repaired 13a, the second sealing ring 130 can also reduce the loss caused by leakage of the repair material; as the graphite powder is injected, the graphite powder will flow to the position of the fourth cable clamping device 100d, and then be recovered into the second recovery device 510 through the repair material channel 1102 of the fourth cable clamping device 100d; wherein, the first sealing ring 120 and the second sealing ring 130 of the fourth cable clamping device 100d can play a sealing role to prevent the graphite powder flowing out of the section to be repaired 13a from continuing to flow to the buffer layer at other positions and causing losses.

[0090] The second recovery device 510 includes a second vacuum pump 511 and a second recovery container 512 connected to the second vacuum pump 511. The second recovery container 512 is connected to the fourth cable clamping device 100d through a fourth pipe 520. The fourth pipe 520 is used to connect the return port of the second recovery container 512 with the repair material channel 1102 of the fourth cable clamping device 100d. The second vacuum pump 511 can evacuate the section 13a to be repaired of the buffer layer 13, so that the graphite powder can flow toward the section 13a to be repaired, and the excess graphite powder is recovered into the second recovery container 512.

[0091] The present invention also provides a cable buffer layer repair method using the cable buffer layer repair system in the third embodiment, which comprises the following steps:

[0092] S100, pre-processing the cable 10 to be repaired.

[0093] Specifically, the outer layer structure 12 and the buffer layer 13 near both ends of the to-be-repaired section 13 a of the to-be-repaired cable 10 are peeled off in advance to expose the inner layer structure 11 .

[0094] S200, using the third cable clamping device 100c to clamp the cable near one end of the section to be repaired 13a, and using the fourth cable clamping device 100d to clamp the cable near the other end of the section to be repaired 13a.

[0095] Specifically, when the third cable clamping device 100c clamps the cable 10 to be repaired, its first sealing ring 120 needs to fit with the outermost wall of the exposed inner layer structure 11, and its second sealing ring 130 needs to fit with the outermost wall of the outer layer structure 12 located outside the section 13a to be repaired; when the fourth cable clamping device 100d clamps the cable 10 to be repaired, its first sealing ring 120 needs to fit with the outermost wall of the exposed inner layer structure 11, and its second sealing ring 130 needs to fit with the outermost wall of the outer layer structure 12 located outside the section 13a to be repaired.

[0096] S300 , starting the second injection system 400 and the second recovery system 500 .

[0097] Specifically, when the second injection system 400 and the second recovery system 500 are started, graphite powder will be injected into the cable buffer layer 13. As the graphite powder is injected, the graphite powder will flow to the position of the fourth cable clamping device 100d, and then be recovered into the second recovery system 500 through the repair material channel 1102 of the fourth cable clamping device 100d. It should be noted that during this period, the dehumidification component 413 needs to be turned on to dehumidify the graphite powder. Among them, when the second recovery system 500 is turned on, the second vacuum pump 511 will also make the graphite powder fully mixed in the buffer layer 13.

[0098] S400 , closing the second injection system 400 and the second recovery system 500 .

[0099] S500, remove the entire cable buffer repair system from the cable.

[0100] It should be noted that, for the above-mentioned embodiment, after the cable is repaired, the stripped buffer layer 13, metal sheath, etc. can be wrapped and repaired with a tape.

[0101] Specifically, the stripped buffer layer 13 is repaired with a semi-conductive cloth, and the stripped metal sheath is repaired with a copper braided tape. In addition, the copper braided tape can be wrapped with an insulating tape for protection.

[0102] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0103] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cable clamping device, characterized in that: include: A clamping member, wherein the clamping member defines a wire passing space, and the clamping member is further provided with a repair material channel communicating with the wire passing space, and a port of the repair material channel at one end close to the wire passing space is a first port; A first sealing ring and a second sealing ring, both of which are arranged in the wire-passing space and sealedly connected to the inner wall of the clamp; a plane perpendicular to the orientation of the first port is defined as a reference plane, and a projection of the first port on the reference plane is located between a projection of the first sealing ring on the reference plane and a projection of the second sealing ring on the reference plane; Among them, the line passing space is used for the cable to be repaired to pass through; the cable to be repaired includes an inner layer structure, an outer layer structure and a buffer layer located between the inner layer structure and the outer layer structure; the first sealing ring is used to seal with the outermost wall of the inner layer structure, and the second sealing ring is used to seal with the outermost wall of the outer layer structure.

2. The cable clamping device according to claim 1, characterized in that: The clamping member is provided with two repair material channels, and the two repair material channels are arranged opposite to each other.

3. The cable clamping device according to claim 1, characterized in that: The clamping member includes two clamping parts, and the two clamping parts are detachably connected.

4. The cable clamping device according to claim 1, characterized in that: The first sealing ring includes at least two independent first sealing parts, and the at least two first sealing parts cooperate to form an annular structure.

5. The cable clamping device according to claim 1, characterized in that: The second sealing ring includes at least two independent second sealing parts, and the at least two second sealing parts cooperate to form an annular structure.

6. A cable buffer layer repair system, characterized in that: It comprises an injection system, wherein the injection system comprises an injection device and a first cable clamping device; Wherein, the first cable clamping device is the cable clamping device according to any one of claims 1 to 3, and the discharge port of the injection device is connected to the repair material channel of the first cable clamping device.

7. The cable buffer layer repair system according to claim 6, characterized in that: The material injection device comprises a material storage container and a conveying source connected to the material storage container, and the material outlet of the material storage container is in communication with the repair material channel of the first cable clamping device; The conveying source is used to drive the repair material in the material storage container into the repair material channel of the first cable clamping device.

8. The cable buffer layer repair system according to claim 7, characterized in that: The material injection device also includes a dehumidifying component arranged in the material storage container.

9. The cable buffer layer repair system according to claim 6, characterized in that: Also included is a retrieval system, the retrieval system including a retrieval device and a second cable clamping device; Wherein, the cable clamping device is the cable clamping device according to any one of claims 1 to 3, and the return material port of the recovery device is connected to the repair material channel of the second cable clamping device.

10. A cable buffer layer repair method, applied to the cable buffer layer repair system according to claim 9, characterized in that: The cable buffer layer repair method comprises: Pre-treating the cable to be repaired so that the outer layer structure and the buffer layer near both ends of the to-be-repaired section of the buffer layer of the cable to be repaired are peeled off so that the inner layer structure is exposed; The first cable clamping device is used to clamp the cable near one end of the section to be repaired, and the second cable clamping device is used to clamp the cable near the other end of the section to be repaired, so that the first sealing ring of the first cable clamping device fits with the outermost wall surface of the exposed inner layer structure, the second sealing ring of the first cable clamping device fits with the outermost wall surface of the outer layer structure located outside the section to be repaired, the first sealing ring of the second cable clamping device fits with the outermost wall surface of the exposed inner layer structure, and the second sealing ring of the second cable clamping device fits with the outermost wall surface of the outer layer structure located outside the section to be repaired; The injection device and the recovery device are started.

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