Cable joint sealing device and cable joint sealing method

Abstract

The invention relates to the technical field of power cable operation, in particular to a cable joint sealing device and a cable joint sealing method. The cable joint sealing device comprises a butt joint assembly, a locking assembly, a tensioning sleeve, an elastic sealing sleeve and a supporting sleeve, the tensioning sleeve, the elastic sealing sleeve and the supporting sleeve are sequentially sleeved together from inside to outside, the butt joint assembly is in butt joint with electrical equipment in a sealed mode, the supporting sleeve and the elastic sealing sleeve are fixedly installed on the butt joint assembly, the elastic sealing sleeve is communicated with a through hole in the butt joint assembly, and the locking assembly is connected with the supporting sleeve. The inner diameter of the tensioning sleeve is larger than the diameter of a cable, the tensioning sleeve can tension the elastic sealing sleeve, the inner diameter of the elastic sealing sleeve which is not tensioned is smaller than the diameter of the cable, the cable sequentially penetrates through the tensioning sleeve and a through hole in the butt joint assembly to be connected with electrical equipment, and the tensioning sleeve can move in the axial direction and is separated from the elastic sealing sleeve. The tensioning sleeve separated from the elastic sealing sleeve can be fixedly connected with the supporting sleeve through the locking assembly, operation is easy, assembling is convenient, the assembling efficiency is high, and the actual operation requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of power cable operations, and in particular to a cable joint sealing device and a cable joint sealing method. Background Art

[0002] With the continuous growth of electricity demand, the scale of power grid construction has expanded rapidly. Cables are key components of power transmission, and the sealing technology of cable joints has become an important link in ensuring the stable operation of power systems. In this context, cable joint sealing structures have emerged. The cable joint sealing structure is designed to achieve efficient and reliable sealing at the cable joints, ensuring the stable performance of the cable in various complex environments.

[0003] In the prior art, in order to seal the cable joint, it is necessary to use a heat shrink sleeve to cover the outer periphery of the cable joint end on the basis of the cable joint being connected to the electrical equipment. When the insulating sleeve is tightly fitted with the insulating outer layer of the cable periphery, it can achieve a good waterproof and isolation effect. However, the assembly of the heat shrink sleeve and the cable is difficult, and the operation steps are cumbersome, resulting in low sealing efficiency of the cable joint, which cannot meet the actual operation requirements, thereby affecting the efficiency of cable laying.

[0004] Therefore, it is urgent to invent a cable joint sealing device and a cable joint sealing method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a cable joint sealing device and a cable joint sealing method to achieve sleeve sealing on the outer periphery of the cable, with good sealing effect, convenient assembly, high assembly efficiency, and meet actual operation requirements.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Cable gland sealing device, comprising:

[0008] Docking assembly, sealed docking with electrical equipment;

[0009] A tension sleeve, an elastic sealing sleeve and a supporting sleeve are sequentially sleeved together from the inside to the outside, the supporting sleeve and the elastic sealing sleeve are respectively installed and fixed to the docking assembly, the elastic sealing sleeve is communicated with the through hole in the docking assembly, the inner diameter of the tension sleeve is larger than the diameter of the cable, the tension sleeve can tighten the elastic sealing sleeve, the inner diameter of the elastic sealing sleeve that is not tightened is smaller than the diameter of the cable, the cable passes through the tension sleeve and the through hole in the docking assembly in sequence and is connected to the electrical device, the tension sleeve can move axially and detach from the elastic sealing sleeve; and

[0010] A locking assembly, wherein the locking assembly can connect and fix the tensioning sleeve separated from the elastic sealing sleeve to the supporting sleeve.

[0011] As an optional solution, the docking assembly includes:

[0012] A butt joint, comprising the through hole for accommodating the cable, wherein the butt joint is provided with a first butt joint portion and a second butt joint portion at two axial ends of the through hole, wherein the diameters of the first butt joint portion and the second butt joint portion are both smaller than the diameter of the butt joint, the first butt joint portion is connected to the electrical device, and the second butt joint portion is connected to the elastic sealing sleeve;

[0013] a first sealing structure, disposed at the first docking portion, the first sealing structure being configured to seal a gap between the first docking portion and the electrical device;

[0014] A first mounting structure, disposed at an end of the butt joint away from the electrical device, the first mounting structure being configured to mount and fix the butt joint and the supporting sleeve; and

[0015] The second mounting structure is arranged at the second docking portion, and the second mounting structure is configured to mount and fix the second docking portion and the elastic sealing sleeve.

[0016] As an optional solution, the first sealing structure includes:

[0017] a first elastic sealing ring, sleeved on the outer circumference of the first butt joint, wherein the radial end surface of the first elastic sealing ring abuts against the radial end surface of the butt joint close to the electrical device; and

[0018] The abutment boss is located at the radial end surface of the butt joint close to the electrical device. The abutment boss and the first elastic sealing ring do not contact each other. The abutment boss extends along the axial direction of the through hole toward the electrical device. The abutment boss can abut against the electrical device. The extension distance of the abutment boss is less than the thickness of the first elastic sealing ring.

[0019] As an optional solution, the first sealing structure has at least two abutment bosses, and at least two of the abutment bosses are arranged at intervals along the circumference of the first elastic sealing ring at the radial end surface of the butt joint close to the electrical device, and at least two of the abutment bosses abut the electrical device synchronously.

[0020] As an optional solution, the first mounting structure includes:

[0021] a connecting rod, located at a radial end surface of the butt joint away from the electrical device, the connecting rod extending in an axial direction of the through hole in a direction away from the electrical device; and

[0022] The first nut, the outer wall of the support sleeve near one end of the butt joint is provided with an extended protrusion, the extended protrusion is provided with a through hole extending along the axial direction of the through hole, the connecting rod is passed through the through hole and then threadedly fixed with the first nut, and the diameter of the first nut is larger than the inner diameter of the through hole.

[0023] As an optional solution, the first mounting structure has at least two connecting rods, and at least two connecting rods are arranged at intervals along the circumference of the supporting sleeve at the radial end surface of the butt joint away from the electrical equipment, and each connecting rod is arranged corresponding to one of the first nut and one of the through holes.

[0024] As an optional solution, the second mounting structure includes:

[0025] Two buckling parts are arranged opposite to each other, the elastic sealing sleeve is sleeved on the outer periphery of the second docking portion, and the two buckling parts are arranged opposite to each other and surround the outer periphery of the elastic sealing sleeve; and

[0026] A locking piece, one end of the two oppositely arranged fastening pieces are rotatably connected, and the other end of the two oppositely arranged fastening pieces is provided with the locking piece, and the locking piece is used to lock and fix the two oppositely arranged fastening pieces so that the two oppositely arranged fastening pieces press the elastic sealing sleeve against the second docking portion.

[0027] As an optional solution, the locking assembly includes:

[0028] A first bolt, a first threaded hole is provided at one end of the support sleeve away from the docking assembly, a second threaded hole is provided at one end of the tensioning sleeve close to the docking assembly, and the first bolt is threadedly connected with the first threaded hole and the second threaded hole in sequence.

[0029] As an optional solution, the cable joint sealing device further includes:

[0030] A reinforcing component, the reinforcing component includes a spring and a screwing ring, the spring is sleeved on the outer circumference of the elastic sealing sleeve, the two ends of the spring are respectively connected to one end of the supporting sleeve close to the docking component and the screwing ring, the screwing ring is sleeved on the outer circumference of the supporting sleeve, the screwing ring can stretch the spring axially and screw the spring along the spiral direction of the spring at the same time, so that the spring is tightly pressed against the outer circumferential wall of the elastic sealing sleeve.

[0031] A cable joint sealing method, applied to the cable joint sealing device as described above, comprises the following steps:

[0032] S1, sleeve the elastic sealing sleeve on the outer periphery of the tension sleeve;

[0033] S2, sleeve the supporting sleeve on the outer circumference of the elastic sealing sleeve and the tensioning sleeve assembled together;

[0034] S3, respectively installing and fixing the supporting sleeve and the elastic sealing sleeve to the docking assembly, and sealingly docking the docking assembly with the electrical equipment;

[0035] S4, passing the cable through the tension sleeve and the docking assembly in sequence and then docking with the electrical equipment;

[0036] S5, pulling out the tension sleeve along the axial direction away from the docking assembly, and using a locking assembly to install and fix the tension sleeve and the supporting sleeve.

[0037] Beneficial effects of the present invention:

[0038] The cable joint sealing device provided by the present invention is achieved by sequentially sleeve-fitting a tension sleeve, an elastic sealing sleeve and a supporting sleeve from the inside to the outside, so that the inner diameter of the tension sleeve is larger than the diameter of the cable, and the inner diameter of the elastic sealing sleeve that has not been tightened is smaller than the diameter of the cable, thereby achieving the effect of the tension sleeve tightening the elastic sealing sleeve, and by respectively installing and fixing the supporting sleeve and the elastic sealing sleeve to the docking assembly, the docking assembly is sealed and docked with the electrical equipment, and the elastic sealing sleeve is connected to the through hole in the docking assembly, so that the cable can sequentially pass through the tension sleeve and the through hole in the docking assembly to be sealed and connected to the electrical equipment. When the tensioning sleeve moves axially and separates from the elastic sealing sleeve, the elastic sealing sleeve is reset and wrapped around the outer periphery of the cable under the action of its own elastic force, so that the elastic sealing sleeve is tightly fitted with the insulating outer layer of the outer periphery of the cable, and the sealing connection between the docking assembly and the electrical equipment is combined to achieve the sealing of the electrical equipment and the cable joint. By using the locking assembly to connect and fix the supporting sleeve with the tensioning sleeve separated from the elastic sealing sleeve, the supporting sleeve and the tensioning sleeve can be sleeved on the outer periphery of the cable, thereby further improving the protection of the cable. The operation is simple, the assembly is convenient, the assembly efficiency is high, and the actual operation needs are met.

[0039] The present invention also provides a cable joint sealing method. By applying the above-mentioned cable joint sealing device, not only the sealing effect at the electrical equipment and cable joint can be improved, but also the protection of the cable can be further improved. The operation is simple, the assembly is convenient, the assembly efficiency is high, and the actual operation requirements are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1is a first schematic diagram of a cable joint sealing device provided by an embodiment of the present invention;

[0041] Figure 2 is a second schematic diagram of the cable joint sealing device provided by an embodiment of the present invention;

[0042] Figure 3 is a schematic structural diagram of a cable connector provided by an embodiment of the present invention;

[0043] Figure 4 It is a structural schematic diagram of a support sleeve and a tension sleeve provided in an embodiment of the present invention;

[0044] Figure 5 is a schematic structural diagram of a tension sleeve provided by an embodiment of the present invention;

[0045] Figure 6 The present invention is a flowchart of a cable joint sealing method provided by an embodiment of the present invention.

[0046] In the figure:

[0047] 100, docking assembly; 110, docking joint; 111, first docking portion; 112, second docking portion; 1121, guide area; 1122, mounting area; 120, first sealing structure; 121, first elastic sealing ring; 122, abutting boss; 130, first mounting structure; 131, connecting rod; 132, first nut; 140, second mounting structure; 141, buckle; 142, locking member;

[0048] 200, support sleeve; 210, extension protrusion; 211, through hole; 220, first threaded hole;

[0049] 300, tension sleeve; 310, second threaded hole; 311, elastic buffer; 320, pulling hole;

[0050] 400, locking assembly; 410, first bolt;

[0051] 500, reinforcement assembly; 510, spring; 520, screwing ring. DETAILED DESCRIPTION

[0052] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0053] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0056] Embodiment 1

[0057] With the continuous growth of electricity demand, the scale of power grid construction has expanded rapidly. Cables are key components of power transmission, and the sealing technology of cable joints has become an important link in ensuring the stable operation of power systems. Against this background, cable joint sealing structures have emerged. The cable joint sealing structure is designed to achieve efficient and reliable sealing at the cable joints to ensure the stable performance of the cable in various complex environments. In the prior art, for the sealing of cable joints, on the basis of the connection between the cable joints and the electrical equipment, a heat shrink sleeve is required to be sleeved on the outer periphery of the cable joint end. When the insulating sleeve is tightly fitted with the insulating outer layer of the cable periphery, it can have a good waterproof and isolation effect. However, the assembly of the heat shrink sleeve and the cable is difficult, and the operation steps are cumbersome, resulting in low sealing efficiency of the cable joints, which cannot meet the actual operation requirements, thereby affecting the efficiency of cable laying.

[0058] In order to solve the above problems, Figure 1 to Figure 5As shown, this embodiment provides a cable joint sealing device. The cable joint sealing device comprises a docking assembly 100, a locking assembly 400, and a tension sleeve 300, an elastic sealing sleeve and a supporting sleeve 200 which are sequentially sleeved and fixed together from the inside to the outside, wherein the docking assembly 100 is sealed and docked with the electrical device, the supporting sleeve 200 and the elastic sealing sleeve are respectively installed and fixed with the docking assembly 100, the elastic sealing sleeve is connected with the through hole in the docking assembly 100, the inner diameter of the tension sleeve 300 is larger than the diameter of the cable, the tension sleeve 300 can tighten the elastic sealing sleeve, the inner diameter of the elastic sealing sleeve that is not tightened is smaller than the diameter of the cable, the cable passes through the tension sleeve 300 and the through hole in the docking assembly 100 in turn and is connected to the electrical device, the tension sleeve 300 can move axially and detach from the elastic sealing sleeve, and the locking assembly 400 can connect and fix the tension sleeve 300 detached from the elastic sealing sleeve with the supporting sleeve 200.

[0059] The cable joint sealing device is configured such that the tension sleeve 300, the elastic sealing sleeve and the supporting sleeve 200 are sequentially sleeved and fixed from the inside to the outside, so that the inner diameter of the tension sleeve 300 is larger than the diameter of the cable, and the inner diameter of the elastic sealing sleeve that is not tightened is smaller than the diameter of the cable, thereby achieving the effect of the tension sleeve 300 tightening the elastic sealing sleeve, and the supporting sleeve 200 and the elastic sealing sleeve are respectively installed and fixed to the docking assembly 100, the docking assembly 100 is sealed and docked with the electrical equipment, and the elastic sealing sleeve is connected to the through hole in the docking assembly 100, so that the cable can sequentially pass through the tension sleeve 300 and the through hole in the docking assembly 100 to be sealed with the electrical equipment. Sealed connection. When the tensioning sleeve 300 moves axially and separates from the elastic sealing sleeve, the elastic sealing sleeve is reset and wrapped around the outer periphery of the cable under the action of its own elastic force, so that the elastic sealing sleeve is tightly fitted with the insulating outer layer of the outer periphery of the cable. Combined with the sealed docking between the docking assembly 100 and the electrical equipment, the sealing of the electrical equipment and the cable joint is achieved. By using the locking assembly 400 to connect and fix the support sleeve 200 with the tensioning sleeve 300 separated from the elastic sealing sleeve, the support sleeve 200 and the tensioning sleeve 300 can be sleeved on the outer periphery of the cable, thereby further improving the protection of the cable. The operation is simple, the assembly is convenient, the assembly efficiency is high, and the actual operation needs are met.

[0060] In this embodiment, in order to further facilitate the extraction of the tension sleeve 300 from the elastic sealing sleeve, a pulling hole 320 is provided at one end of the tension sleeve 300 away from the docking assembly 100. The staff can use a hook or other tool to penetrate into the pulling hole 320, and then pull the hook or other tool, thereby improving the convenience of operation.

[0061] As an optional solution, the docking assembly 100 includes a docking joint 110, a first sealing structure 120, a first mounting structure 130 and a second mounting structure 140, wherein the docking joint 110 has a through hole for accommodating a cable, and the docking joint 110 is provided with a first docking portion 111 and a second docking portion 112 at both axial ends of the through hole, respectively, the diameters of the first docking portion 111 and the second docking portion 112 are both smaller than the diameter of the docking joint 110, the first docking portion 111 is connected to the electrical equipment, the second docking portion 112 is connected to the elastic sealing sleeve, the first sealing structure 120 is arranged at the first docking portion 111, and the first sealing structure 120 is configured to block the gap between the first docking portion 111 and the electrical equipment, the first mounting structure 130 is arranged at one end of the docking joint 110 away from the electrical equipment, the first mounting structure 130 is configured to install and fix the docking joint 110 and the support sleeve 200, and the second mounting structure 140 is arranged at the second docking portion 112, and the second mounting structure 140 is configured to install and fix the second docking portion 112 and the elastic sealing sleeve. By setting a through hole on the butt joint 110, and setting a first butt joint part 111 and a second butt joint part 112 at both ends of the butt joint 110 along the axial direction of the through hole, it is ensured that the diameters of the first butt joint part 111 and the second butt joint part 112 are both smaller than the diameter of the butt joint 110, and the first sealing structure 120 is set at the first butt joint part 111, and the first sealing structure 120 is used to block the gap between the first butt joint part 111 and the electrical equipment, thereby achieving a sealed connection between the first butt joint part 111 and the electrical equipment, and the first mounting structure 130 is set at the butt joint 110, and the butt joint 110 and the support sleeve 200 are installed and fixed by the first mounting structure 130, and the second mounting structure 140 is set at the second butt joint part 112, and the second butt joint part 112 and the elastic sealing sleeve are installed and fixed by the second mounting structure 140, thereby achieving a sealed connection between the cable and the electrical equipment after passing through the butt joint 110.

[0062] Specifically, the first sealing structure 120 includes a first elastic sealing ring 121 and an abutment boss 122, wherein the first elastic sealing ring 121 is sleeved on the outer periphery of the first docking portion 111, and the radial end face of the first elastic sealing ring 121 abuts against the radial end face of the docking joint 110 close to the electrical equipment, and the abutment boss 122 is located at the radial end face of the docking joint 110 close to the electrical equipment, and the abutment boss 122 and the first elastic sealing ring 121 do not contact each other, and the abutment boss 122 extends along the axial direction of the through hole toward the direction close to the electrical equipment, and the abutment boss 122 can abut against the electrical equipment, and the extension distance of the abutment boss 122 is less than the thickness of the first elastic sealing ring 121. By sleeve-mounting the first elastic sealing ring 121 on the outer periphery of the first docking portion 111, the radial end face of the first elastic sealing ring 121 is abutted against the radial end face of the docking joint 110 close to the electrical device, and an abutting boss 122 extending in the direction close to the electrical device is provided on the radial end face of the docking joint 110 close to the electrical device, so as to ensure that the abutting boss 122 and the first elastic sealing ring 121 do not contact each other. When the abutting boss 122 abuts against the electrical device, the extension distance of the abutting boss 122 is less than the thickness of the first elastic sealing ring 121, and the first elastic sealing ring 121 will be compressed between the radial end face of the docking joint 110 close to the electrical device and the electrical device, so as to achieve sealed docking between the first docking portion 111 and the electrical device. It should be noted that in the present embodiment, the first elastic sealing ring 121 is made of rubber material. The rubber material has good elasticity, toughness and wear resistance, and has a long service life.

[0063] In order to further facilitate the determination of the docking effect between the first docking portion 111 and the electrical equipment, the first sealing structure 120 has at least two abutting bosses 122, and at least two abutting bosses 122 are arranged at the radial end surface of the docking joint 110 close to the electrical equipment along the circumferential interval of the first elastic sealing ring 121, and at least two abutting bosses 122 abut the electrical equipment synchronously. By arranging at least two abutting bosses 122 at circumferential intervals along the first elastic sealing ring 121, at least two abutting bosses 122 abut the electrical equipment synchronously, it is possible to ensure that the first docking portion 111 is directly opposite to the electrical equipment, thereby improving the docking effect between the first docking portion 111 and the electrical equipment. It should be noted that, in the present embodiment, the first sealing structure 120 has six abutting bosses 122. In other embodiments, the specific number of abutting bosses 122 can also be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0064] Combination Figure 2The specific structure of the first mounting structure 130 is described. The first mounting structure 130 includes a connecting rod 131 and a first nut 132, wherein the connecting rod 131 is located at the radial end face of the docking joint 110 away from the electrical equipment, and the connecting rod 131 extends along the axial direction of the through hole in a direction away from the electrical equipment. The outer peripheral wall of the support sleeve 200 near one end of the docking joint 110 is provided with an extended protrusion 210, and the extended protrusion 210 is provided with a through hole 211 extending along the axial direction of the through hole. After the connecting rod 131 passes through the through hole 211, it is threadedly fixed with the first nut 132, and the diameter of the first nut 132 is larger than the inner diameter of the through hole 211. A connecting rod 131 extending in a direction away from the electrical equipment is arranged on a radial end face of the butt joint 110 away from the electrical equipment, and an extension protrusion 210 is arranged on the outer peripheral wall of the support sleeve 200 close to one end of the butt joint 110, and a through hole 211 is arranged on the extension protrusion 210, so that the connecting rod 131 is threadedly connected with the first nut 132 after passing through the through hole 211, and the connecting rod 131 is connected together with the first nut 132 by utilizing the characteristic that the diameter of the first nut 132 is larger than the inner diameter of the through hole 211.

[0065] In order to further improve the installation effect of the butt joint 110 and the support sleeve 200, the first installation structure 130 has at least two connecting rods 131, and at least two connecting rods 131 are arranged at intervals along the circumference of the support sleeve 200 at the radial end surface of the butt joint 110 away from the electrical equipment, and each connecting rod 131 is arranged corresponding to a first nut 132 and a through hole 211. It should be noted that in this embodiment, the first installation structure 130 has six connecting rods 131, and the six connecting rods 131 are arranged at equal intervals on the outer periphery of the support sleeve 200, and each connecting rod 131 is arranged corresponding to a through hole 211 and a first nut 132. In other embodiments, the specific number of connecting rods 131, through holes 211 and first nuts 132 can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0066] As an alternative, Figure 3As shown, the second mounting structure 140 includes two buckling members 141 and a locking member 142 arranged opposite to each other, wherein the elastic sealing sleeve is sleeved on the outer periphery of the second docking portion 112, the two buckling members 141 arranged opposite to each other are arranged around the outer periphery of the elastic sealing sleeve, one end of the two buckling members 141 arranged opposite to each other is rotatably connected, and the other end of the two buckling members 141 arranged opposite to each other is provided with a locking member 142, and the locking member 142 is used to lock and fix the two buckling members 141, so that the two buckling members 141 arranged opposite to each other press the elastic sealing sleeve against the second docking portion 112. By sleeveing ​​the elastic sealing sleeve on the outer periphery of the second docking portion 112, the two buckling members 141 are arranged around the outer periphery of the elastic sealing sleeve, one end of the two buckling members 141 is rotatably connected, and the other end of the two buckling members 141 is connected through the locking member 142, the two buckling members 141 can be pressed against the elastic sealing sleeve respectively, and then the elastic sealing sleeve is pressed against the second docking portion 112.

[0067] It should be noted that, in this embodiment, the locking member 142 is a threaded rod, and the two fastening members 141 are respectively provided with threaded through holes, and the threaded rod is sequentially threadedly fixed with the threaded through holes on the two fastening members 141. When it is necessary to fix the elastic sealing sleeve and the second docking portion 112, the two fastening members 141 are firstly arranged around the outer periphery of the elastic sealing sleeve, and then the two fastening members 141 are rotated so that the two fastening members 141 are respectively pressed against the elastic sealing sleeve, and finally the threaded rod is sequentially threadedly fixed with the threaded through holes in the two fastening members 141 to complete the installation and fixation of the elastic sealing sleeve and the second docking portion 112.

[0068] In addition, in order to improve the fixing effect of the fastening piece 141, a semicircular groove is provided in each fastening piece 141. When two fastening pieces 141 face each other, they form a circular groove. The circular groove is adapted to the elastic sealing sleeve to install and fix the elastic sealing sleeve to the second docking portion 112 from the circumferential direction of the elastic sealing sleeve.

[0069] In this embodiment, the second docking portion 112 includes an installation area 1122 and a guide area 1121 connected in sequence. The guide area 1121 is located at the end of the installation area 1122 away from the docking joint 110. The inner diameter of the guide area 1121 gradually decreases as it extends from the end close to the installation area 1122 to the end away from the installation area 1122, so that the elastic sealing sleeve can be sleeved along the guide area 1121 on the outer periphery of the second docking portion 112, and the fastener 141 presses the elastic sealing sleeve against the installation area 1122.

[0070] In addition, in this embodiment, an annular cutter is provided on the inner wall of the support sleeve 200, and the annular cutter can cut the sealing sleeve along the circumferential direction of the sealing sleeve. When it is necessary to disassemble the second docking portion 112 and the elastic sealing sleeve fixed together, in addition to loosening the second mounting structure 140, the support sleeve 200 can also be driven to move toward the second docking portion 112, so that the annular cutter in the support sleeve 200 cuts the elastic sealing sleeve along the circumferential direction in the guide area 1121.

[0071] In one alternative, if Figure 1 , Figure 2 as well as Figure 4 As shown, the locking assembly 400 includes a first bolt 410, wherein a first threaded hole 220 is provided at one end of the support sleeve 200 away from the docking assembly 100, a second threaded hole 310 is provided at one end of the tension sleeve 300 close to the docking assembly 100, and the first bolt 410 is threadedly connected with the first threaded hole 220 and the second threaded hole 310 in sequence. By providing the first threaded hole 220 at one end of the support sleeve 200 away from the docking assembly 100 and providing the second threaded hole 310 at one end of the tension sleeve close to the docking assembly 100, when the tension sleeve 300 is separated from the elastic sealing sleeve, the first bolt 410 is threadedly fixed with the first threaded hole 220 and the second threaded hole 310 in sequence, thereby achieving the installation and fixation of the support sleeve 200 and the tension sleeve 300.

[0072] It should be noted that, in this embodiment, the locking assembly 400 includes four first bolts 410, the support sleeve 200 is provided with four first threaded holes 220 at intervals along the circumferential direction, and the tension sleeve 300 is provided with four second threaded holes 310 at intervals along the circumferential direction, and each first bolt 410 is provided corresponding to one first threaded hole 220 and one second threaded hole 310. In other embodiments, the specific number of the first bolts 410 can also be adjusted according to actual needs, and it is only necessary to ensure that each first bolt 410 is provided corresponding to one first threaded hole 220 and one second threaded hole 310, which is not specifically limited in this embodiment.

[0073] In order to further improve the protection of the cable, an elastic buffer 311 is provided in the second threaded hole 310 in the tension sleeve 300. The elastic buffer 311 is arranged at one end of the second threaded hole 310 away from the first threaded hole 220 and blocks the second threaded hole 310. When the first bolt 410 is threadedly fixed with the first threaded hole 220 and the second threaded hole 310 in sequence, the elastic buffer 311 can be clamped between the first bolt 410 and the cable to avoid direct contact between the first bolt 410 and the cable, thereby achieving the purpose of improving the protection of the cable. It should be noted that in this embodiment, the elastic buffer 311 is made of rubber material. The rubber material has good elasticity, toughness and wear resistance, and has a long service life. In other embodiments, the elastic buffer 311 can also be made of other elastic materials, which is not specifically limited in this embodiment.

[0074] Alternatively, if Figure 4 As shown, the cable joint sealing device provided in this embodiment also includes a reinforcing component 500. The reinforcing component 500 includes a spring 510 and a screwing ring 520, wherein the spring 510 is sleeved on the outer periphery of the elastic sealing sleeve, and the two ends of the spring 510 are respectively connected to one end of the support sleeve 200 close to the docking component 100 and the screwing ring 520, and the screwing ring 520 is sleeved on the outer periphery of the support sleeve 200. The screwing ring 520 can axially stretch the spring 510 while screwing the spring 510 along the spiral direction of the spring 510, so that the spring 510 and the outer peripheral wall of the elastic sealing sleeve are tightly pressed. By setting the screwing ring 520 to screw the spring 510 along the spiral direction of the spring 510 while stretching the spring 510, the cross-sectional area of ​​the inner circle of the spring 510 can be reduced, so that the spring 510 sleeved on the outer periphery of the elastic sealing sleeve is tightly pressed against the elastic sealing sleeve, further ensuring the pressing effect between the elastic sealing sleeve and the cable, thereby improving the sealing effect on the cable.

[0075] In this embodiment, a threaded groove is provided on the outer peripheral wall of the support sleeve 200, and the threaded groove extends along the axial direction of the support sleeve 200. The screw-in ring 520 cooperates with the threaded groove. When the spring 510 needs to be pressed against the elastic sealing sleeve, the screw-in ring 520 is moved in a direction away from the docking joint 110 and rotated along the spiral direction of the spring 510.

[0076] In addition, in other embodiments, in order to further improve the positioning effect of the screwing ring 520, a third threaded hole can also be opened on the screwing ring 520, so that the third threaded hole is opposite to the first threaded hole 220 on the support sleeve 200, and the first bolt 410 is threadedly fixed with the third threaded hole, the first threaded hole 220 and the second threaded hole 310 in sequence.

[0077] This embodiment also provides a cable joint sealing method. Figure 6As shown, the cable joint sealing method is applied to the above-mentioned cable joint sealing device, comprising the following steps:

[0078] S1, putting the elastic sealing sleeve on the outer periphery of the tension sleeve 300;

[0079] S2, sleeve the support sleeve 200 on the outer circumference of the elastic sealing sleeve and the tension sleeve 300 assembled together;

[0080] S3, respectively installing and fixing the support sleeve 200 and the elastic sealing sleeve to the docking assembly 100, and sealingly docking the docking assembly 100 with the electrical equipment;

[0081] S4, passing the cable through the tension sleeve 300 and the docking assembly 100 in sequence and then docking with the electrical equipment;

[0082] S5. Pull out the tension sleeve 300 axially in a direction away from the docking assembly 100, and use the locking assembly 400 to install and fix the tension sleeve 300 and the supporting sleeve 200.

[0083] The cable joint sealing method, by applying the above-mentioned cable joint sealing device, can not only improve the sealing effect between the electrical equipment and the cable joint, but also can further improve the protection of the cable, and has simple operation, convenient assembly, high assembly efficiency, and meets actual operation needs.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cable joint sealing device, characterized in that: include: A docking assembly (100) is sealed and docked with the electrical equipment; A tension sleeve (300), an elastic sealing sleeve and a support sleeve (200) are sequentially sleeved together from the inside to the outside, the support sleeve (200) and the elastic sealing sleeve are respectively installed and fixed to the docking assembly (100), the elastic sealing sleeve is in communication with a through hole in the docking assembly (100), the inner diameter of the tension sleeve (300) is larger than the diameter of the cable, the tension sleeve (300) can tighten the elastic sealing sleeve, the inner diameter of the elastic sealing sleeve that is not tightened is smaller than the diameter of the cable, the cable passes through the tension sleeve (300) and the through hole in the docking assembly (100) in sequence to be connected to the electrical device, and the tension sleeve (300) can move axially and detach from the elastic sealing sleeve; and A locking assembly (400) is capable of connecting and fixing the tensioning sleeve (300) separated from the elastic sealing sleeve to the supporting sleeve (200).

2. The cable joint sealing device according to claim 1, characterized in that: The docking assembly (100) comprises: A butt joint (110) having a through hole for accommodating the cable, the butt joint (110) being provided with a first butt joint portion (111) and a second butt joint portion (112) at two axial ends of the through hole, the diameters of the first butt joint portion (111) and the second butt joint portion (112) being smaller than the diameter of the butt joint (110), the first butt joint portion (111) being connected to the electrical device, and the second butt joint portion (112) being connected to the elastic sealing sleeve; A first sealing structure (120) is arranged at the first docking portion (111), and the first sealing structure (120) is configured to seal a gap between the first docking portion (111) and the electrical device; a first mounting structure (130), arranged at an end of the butt joint (110) away from the electrical device, the first mounting structure (130) being configured to mount and fix the butt joint (110) and the supporting sleeve (200); and The second mounting structure (140) is arranged at the second docking portion (112), and the second mounting structure (140) is configured to mount and fix the second docking portion (112) and the elastic sealing sleeve.

3. The cable joint sealing device according to claim 2, characterized in that: The first sealing structure (120) comprises: A first elastic sealing ring (121) is sleeved on the outer circumference of the first docking portion (111), wherein a radial end surface of the first elastic sealing ring (121) abuts against a radial end surface of the docking joint (110) close to the electrical device; and An abutment boss (122) is located at a radial end surface of the butt joint (110) close to the electrical device. The abutment boss (122) and the first elastic sealing ring (121) do not contact each other. The abutment boss (122) extends along the axial direction of the through hole toward the electrical device. The abutment boss (122) can abut against the electrical device. The extension distance of the abutment boss (122) is less than the thickness of the first elastic sealing ring (121).

4. The cable joint sealing device according to claim 3, characterized in that: The first sealing structure (120) has at least two abutment bosses (122), and the at least two abutment bosses (122) are arranged at intervals along the circumference of the first elastic sealing ring (121) at the radial end surface of the butt joint (110) close to the electrical device, and the at least two abutment bosses (122) abut against the electrical device synchronously.

5. The cable joint sealing device according to claim 2, characterized in that: The first mounting structure (130) comprises: a connecting rod (131), located at a radial end surface of the butt joint (110) away from the electrical device, the connecting rod (131) extending in an axial direction of the through hole in a direction away from the electrical device; and A first nut (132), an outer peripheral wall of the support sleeve (200) close to one end of the butt joint (110) is provided with an extension protrusion (210), and the extension protrusion (210) is provided with a through hole (211) extending along the axial direction of the through hole, and the connecting rod (131) is threadedly fixed to the first nut (132) after passing through the through hole (211), and the diameter of the first nut (132) is larger than the inner diameter of the through hole (211).

6. The cable joint sealing device according to claim 5, characterized in that: The first mounting structure (130) has at least two connecting rods (131), and at least two connecting rods (131) are arranged at intervals along the circumference of the supporting sleeve (200) at the radial end surface of the butt joint (110) away from the electrical equipment, and each connecting rod (131) is arranged corresponding to one of the first nut (132) and one of the through holes (211).

7. The cable joint sealing device according to claim 2, characterized in that: The second mounting structure (140) comprises: Two buckling parts (141) are arranged opposite to each other, the elastic sealing sleeve is sleeved on the outer periphery of the second docking portion (112), and the two buckling parts (141) are arranged opposite to each other and surround the outer periphery of the elastic sealing sleeve; and A locking member (142) is rotatably connected to one end of the two oppositely arranged fastening members (141), and the other end of the two oppositely arranged fastening members (141) is provided with the locking member (142), and the locking member (142) is used to lock and fix the two oppositely arranged fastening members (141), so that the two oppositely arranged fastening members (141) press the elastic sealing sleeve against the second docking portion (112).

8. The cable joint sealing device according to claim 1, characterized in that: The locking assembly (400) comprises: A first bolt (410), a first threaded hole (220) is provided at one end of the support sleeve (200) away from the docking assembly (100), a second threaded hole (310) is provided at one end of the tension sleeve (300) close to the docking assembly (100), and the first bolt (410) is threadedly connected to the first threaded hole (220) and the second threaded hole (310) in sequence.

9. The cable joint sealing device according to claim 1, characterized in that: The cable joint sealing device also includes: A reinforcing assembly (500), the reinforcing assembly (500) comprising a spring (510) and a screwing ring (520), the spring (510) being sleeved on the outer circumference of the elastic sealing sleeve, the two ends of the spring (510) being respectively connected to one end of the supporting sleeve (200) close to the docking assembly (100) and the screwing ring (520), the screwing ring (520) being sleeved on the outer circumference of the supporting sleeve (200), the screwing ring (520) being capable of axially stretching the spring (510) and screwing the spring (510) along the spiral direction of the spring (510) so that the spring (510) is tightly pressed against the outer circumferential wall of the elastic sealing sleeve.

10. A cable joint sealing method, characterized in that: The cable joint sealing device according to any one of claims 1 to 9 comprises the following steps: S1, sleeve the elastic sealing sleeve on the outer circumference of the tension sleeve (300); S2, sleeve the supporting sleeve (200) onto the outer circumference of the elastic sealing sleeve and the tensioning sleeve (300) assembled together; S3, respectively installing and fixing the supporting sleeve (200) and the elastic sealing sleeve to the docking assembly (100), and sealingly docking the docking assembly (100) with the electrical equipment; S4, passing the cable through the tension sleeve (300) and the docking assembly (100) in sequence, and then docking the cable with the electrical equipment; S5. Pull out the tension sleeve (300) along the axial direction away from the docking assembly (100), and use a locking assembly (400) to install and fix the tension sleeve (300) and the supporting sleeve (200).

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