Cable joint insulating sheath

Abstract

The invention relates to the technical field of power equipment, in particular to a cable joint insulating sheath which comprises a replacement joint provided with a detachable connecting part, and further comprises a protective sleeve fixedly connected with the replacement joint and internally provided with a first clinging protective sleeve and a second clinging protective sleeve. The protection control mechanism is connected with the protection sleeve, the first attaching protection sleeve and the second attaching protection sleeve, and the protection control mechanism comprises an adsorption protection assembly and a segmented tightening assembly; according to the cable joint insulating sheath, for cable joints in some special areas, the enough sealing degree can be guaranteed, the situation that dust enters the cable joints or short circuits occur is avoided, therefore, electricity utilization safety is guaranteed, and convenience is provided for workers.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, in particular to an insulating sheath for a cable joint. Background Art

[0002] Cable joint insulation sheaths are mainly used in the connection parts of power cables, especially cable terminals and joints. Since these parts need to be manually made and installed, there are problems such as defects in human factors, defects in material factors, and strong concealment of defects. In order to ensure the safe operation of power cables, these parts need to be reliably insulated. The cable joint insulation sheath is designed to meet this demand. It can effectively provide insulation protection and prevent safety accidents caused by faults such as short circuits and leakage. In addition, with the rapid development of the power industry and the continuous upgrading of power equipment, the market demand for cable joint insulation sheaths is also increasing. Especially driven by the development of smart grids, new energy and other fields, the performance and quality requirements of cable joint insulation sheaths are getting higher and higher.

[0003] During use, the existing cable joint insulating sheath has high sealing requirements for cable joints in some special areas, such as humid or dusty areas. Otherwise, it is easy to cause dust to enter the joint or a short circuit to occur, thereby causing safety accidents and being inconvenient to use. Therefore, in view of the above situation, it is urgent to develop a cable joint insulating sheath to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide an insulating sheath for a cable joint to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A cable joint insulating sheath, comprising a replacement joint, the replacement joint being provided with a detachable connection portion, and further comprising: A protective sleeve, wherein the protective sleeve is fixedly connected to the replacement joint, and a first close-fitting protective sleeve and a second close-fitting protective sleeve are arranged in the protective sleeve; Among them, one end of the close-fitting protective sleeve 1 is fixedly connected to the inner wall of the replacement joint, the other end of the close-fitting protective sleeve 1 is fixedly connected to the inner wall of the protective sleeve, and both ends of the close-fitting protective sleeve 2 are fixedly connected to the inner wall of the protective sleeve; and a protection control mechanism, the protection control mechanism is respectively connected to the protection sleeve, the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2, wherein the protection control mechanism includes an adsorption protection component and a segmented tightening component; The adsorption protection component is connected to the protection sleeve and is in communication with the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2. The segmented tightening component is connected to the protection sleeve and is detachably connected to the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2.

[0006] As a further solution of the present invention: the number of the replacement joint, the protective sleeve and the protection control mechanism are two sets, and the two sets of the replacement joints are connected by locking screws; A sealing ring is also arranged between the two replacement joints, a transition hole is also opened on the replacement joint, the diameter of the transition hole is smaller than the inner diameter of the replacement joint, and a plurality of limit grooves are also opened on the transition hole.

[0007] As a further solution of the present invention: it also includes: a protective joint, the protective joint is detachably connected to the replacement joint, and a plurality of limiting grooves 2 are also provided on the protective joint; An annular groove, the annular groove is provided on the protective joint; And a sealing locking assembly, wherein the sealing locking assembly is fixedly connected to the protective joint.

[0008] As a further solution of the present invention: the sealing and locking assembly comprises: A soft clinging portion, wherein the soft clinging portion is fixedly connected to the protective joint; A limiting convex portion, the limiting convex portion is fixedly mounted on the other end of the soft close-fitting portion; And a locking ring sleeve, wherein the locking ring sleeve is detachably connected to the soft abutting portion.

[0009] As a further solution of the present invention: the number of the second close-fitting protective sleeves is multiple, and the multiple second close-fitting protective sleeves are evenly distributed in the protective sleeve; An annular partition is arranged between the two adjacent close-fitting protective sleeves, and the annular partition is fixedly connected to the inner wall of the protective sleeve.

[0010] As a further solution of the present invention: the adsorption protection component includes: An adsorption control box, wherein the adsorption control box is fixedly connected to the protective sleeve; An inspection cover, the inspection cover is detachably connected to the adsorption control box, and a suction port is also provided on the inspection cover; And a connecting part one, the two ends of which are respectively fixedly connected to the adsorption control box and the close-fitting protective sleeve one, and the connecting part one is also respectively connected to the suction port and the close-fitting protective sleeve one.

[0011] As a further solution of the present invention: the segmented tightening assembly comprises: A tightening and reinforcing box, wherein the number of the tightening and reinforcing boxes is two, the two tightening and reinforcing boxes are symmetrically mounted on the protective sleeve, and a plurality of baffle plates are fixedly mounted on the tightening and reinforcing box; A tightening and accommodating ring, wherein the number of the tightening and accommodating rings is multiple, and the multiple tightening and accommodating rings are distributed on the protective sleeve and fixedly connected to the tightening and reinforcing box; And a rotating tightening unit, which is respectively connected to the tightening accommodating ring and the tightening reinforcement box, and is respectively detachably connected to the tight protective sleeve 1 and the tight protective sleeve 2.

[0012] As a further solution of the present invention: the rotary tightening unit comprises: A manual tightening screw head, wherein the number of the manual tightening screw heads is multiple, and the multiple manual tightening screw heads are all rotatably mounted on the tightening and reinforcement box, wherein two manual tightening screw heads form a pair, and the two pairs of manual tightening screw heads are respectively mounted on two tightening and reinforcement boxes and are arranged opposite to each other; A tightening rope 1, wherein the tightening rope 1 is wound around the close-fitting protective sleeve 1, and the two ends of the tightening rope 1 are respectively connected to two manual tightening rotary heads arranged opposite to each other; And a second tightening rope, wherein the second tightening rope is wound around the second tight protective sleeve, and the two ends of the second tightening rope are respectively connected to the other two manual tightening rotary heads arranged opposite to each other, wherein the first tightening rope and the second tightening rope are respectively located on both sides of the annular partition.

[0013] As a further solution of the present invention: it also includes: a second connecting portion, the second connecting portion is fixedly connected to the second close-fitting protective sleeve and communicates with the second close-fitting protective sleeve; A temperature detection controller, which is fixedly mounted on the inner wall of the protective sleeve and electrically connected to the solenoid valve on the second connecting portion; And an air vent portion, wherein the air vent portion is arranged on the inspection cover and is communicated with the second connecting portion.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When protecting cable joints, especially in special areas with high humidity or dust (at this time, in order to ensure the safe use of cables, factors such as installation costs are secondary considerations), first, before the cables are connected, two sets of replacement joints and protective sleeves are respectively sleeved on the two cables to be connected, and after the cable connection is completed, the two replacement joints are connected by locking screws. At this time, under the sealing action of the sealing ring, the cable joint can be placed in the sealed space between the two replacement joints. In addition, through the setting of the limit groove 1, it can be clamped with the convex part set on the cable line (the part of the cable joint can cover or fuse the convex part structure corresponding to the limit groove 1 structure), which can avoid relative rotation between the replacement joint and the cable during the installation of the protective sleeve and subsequent use, and can further ensure the stability of the connection between the two. At this time, the two protective sleeves are respectively sleeved on the two cables, but are not in a sealed state. Then, through the drawer carried by the staff, The suction device can perform a suction action on the adsorption protection component. During the suction process, the space inside the tight protective sleeve one and the tight protective sleeve two is gradually in a negative pressure state (the cable is located in the tight protective sleeve one and the tight protective sleeve two). Among them, the tight protective sleeve one and the tight protective sleeve two can be made of plastic or rubber, and the thickness can be set according to actual needs. Under the action of air pressure, the tight protective sleeve one and the tight protective sleeve two will be tightly attached to the cable. At this time, the segmented tightening component is driven by manpower to tighten the tight protective sleeve one and multiple tight protective sleeves two in the protective sleeve in segments to avoid damage to a certain part of the tight protective sleeve one or the tight protective sleeve two, making the entire protective sleeve in a non-sealed state, thereby ensuring the safety of the use of the protective sleeve and simple operation. For cable joints in some special areas, sufficient sealing can be guaranteed to avoid dust entering the cable joints or short circuits, thereby ensuring electrical safety and providing convenience for staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the front side of the insulating sheath of the cable connector in an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the insulating sheath of the cable connector in the embodiment of the present invention in the rear direction.

[0017] Figure 3 Schematic diagram of the three-dimensional structure of the soft clinging part in the embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the transition hole in an embodiment of the present invention.

[0019] Figure 5 Schematic diagram of the three-dimensional structure of the annular slot in an embodiment of the present invention.

[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of the protective sleeve in an embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the close-fitting protective sleeve distribution in an embodiment of the present invention.

[0022] Figure 8 Schematic diagram of the main structure of the temperature detection controller in an embodiment of the present invention.

[0023] In the figure: 1-protective joint, 2-locking ring sleeve, 3-detachable connecting part, 4-limiting convex part, 5-replaceable joint, 6-protective sleeve, 7-tightening accommodating ring, 8-tightening reinforcement box, 9-adsorption control box, 10-inspection cover, 11-suction port, 12-venting port, 13-baffle plate, 14-manual tightening screw head, 15-soft tight part, 16-locking screw, 17-sealing ring, 18-limiting groove one, 19-transition hole, 20-limiting groove two, 21-annular card groove, 22-tightening protective sleeve one, 23-tightening protective sleeve two, 24-annular partition, 25-tightening rope one, 26-tightening rope two, 27-connecting part one, 28-temperature detection controller, 29-connecting part two. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0026] See also Figure 1-Figure 8 , an insulating sheath of a cable joint provided by an embodiment of the present invention comprises a replacement joint 5, on which a detachable connection portion 3 is further provided (wherein the detachable connection portion 3 is similar to a flange structure), and further comprises: A protective sleeve 6, wherein the protective sleeve 6 is fixedly connected to the replacement joint 5, and a close-fitting protective sleeve 1 22 and a close-fitting protective sleeve 2 23 are arranged in the protective sleeve 6; Among them, one end of the close-fitting protective sleeve 1 22 is fixedly connected to the inner wall of the replacement joint 5, the other end of the close-fitting protective sleeve 1 22 is fixedly connected to the inner wall of the protective sleeve 6, and both ends of the close-fitting protective sleeve 2 23 are fixedly connected to the inner wall of the protective sleeve 6; and a protection control mechanism, the protection control mechanism is respectively connected to the protection sleeve 6, the close protection sleeve 1 22 and the close protection sleeve 2 23, wherein the protection control mechanism includes an adsorption protection component and a segmented tightening component; The adsorption protection component is connected to the protection sleeve 6, and is communicated with the close-fitting protection sleeve 1 22 and the close-fitting protection sleeve 2 23. The segmented tightening component is connected to the protection sleeve 6, and is detachably connected to the close-fitting protection sleeve 1 22 and the close-fitting protection sleeve 2 23.

[0027] See also Figure 1-Figure 8 The number of the replacement joint 5, the protective sleeve 6 and the protection control mechanism are two sets, and the two sets of the replacement joints 5 are connected by locking screws 16; A sealing ring 17 is also provided between the two replacement joints 5 , and a transition hole 19 is also provided on the replacement joint 5 . The diameter of the transition hole 19 is smaller than the inner diameter of the replacement joint 5 , and a plurality of limiting grooves 18 are also provided on the transition hole 19 .

[0028] When protecting the cable joints, especially for special areas with high humidity or dust (at this time, in order to ensure the safe use of the cable, factors such as the cost of installation are secondary considerations), first, before the cable is connected, two sets of replacement joints 5 and protective sleeves 6 are respectively sleeved on the two cables to be connected, and after the cable connection is completed, the two replacement joints 5 are connected by locking screws 16. At this time, under the sealing effect of the sealing ring 17, the cable joint can be placed in the sealed space between the two replacement joints 5. In addition, through the set limit groove 18, it can be clamped with the convex part set on the cable (the part of the cable joint can cover or fuse the convex part structure corresponding to the limit groove 18 structure), which can avoid relative rotation between the replacement joint 5 and the cable during the installation of the protective sleeve and subsequent use, and can further ensure the stability of the connection between the two. At this time, the two protective sleeves 6 are respectively sleeved on the two cables, but are not in a sealed state. Then, the suction equipment carried by the staff can be used to The adsorption protection component performs a suction action. During the suction process, the space inside the tight protective sleeve 1 22 and the tight protective sleeve 2 23 is gradually in a negative pressure state (the cable is located in the tight protective sleeve 1 22 and the tight protective sleeve 2 23). Among them, the tight protective sleeve 1 22 and the tight protective sleeve 2 23 can be made of plastic or rubber, and the thickness can be set according to actual needs. Under the action of air pressure, the tight protective sleeve 1 22 and the tight protective sleeve 2 23 will be tightly attached to the cable. At this time, the segmented tightening component is driven by manpower to tighten the tight protective sleeve 1 22 and multiple tight protective sleeves 2 23 in the protective sleeve 6 in segments to avoid damage to a certain part of the tight protective sleeve 1 22 or the tight protective sleeve 2 23, so that the entire protective sleeve 6 is in a non-sealed state, thereby ensuring the safety of the use of the protective sleeve and simple operation. For cable joints in some special areas, sufficient sealing can be guaranteed to avoid dust entering the cable joints or short circuits, thereby ensuring electrical safety and providing convenience for staff.

[0029] In one embodiment of the present invention, see Figure 1-Figure 8 , further comprising: a protective joint 1, the protective joint 1 being detachably connected to the replacement joint 5, and the protective joint 1 being provided with a plurality of limiting grooves 20; An annular groove 21, wherein the annular groove 21 is provided on the protective connector 1; And a sealing locking assembly, wherein the sealing locking assembly is fixedly connected to the protective joint 1.

[0030] The sealing and locking assembly comprises: A soft close-fitting portion 15, wherein the soft close-fitting portion 15 is fixedly connected to the protective joint 1; A limiting protrusion 4, wherein the limiting protrusion 4 is fixedly mounted on the other end of the soft close-fitting portion 15; And a locking ring sleeve 2, wherein the locking ring sleeve 2 is detachably connected to the soft abutting portion 15.

[0031] For the connection parts between the cable and the distribution box and other structures, the replacement connector 5 can be connected to the protective connector 1 through the provided protective connector 1, and the protective connector 1 is fixedly installed at the connector of the distribution box (wherein the replacement connector 5 is inserted into the connector of the distribution box and is fastened with a locking ring sleeve 2, thereby ensuring the sealing and tightness of the connection). On the one hand, when the protective sleeve fails, the replacement connector 5 and the protective sleeve 6 can be replaced without disassembling the protective connector 1. On the other hand, the replacement connector 5 and the protective sleeve 6 can be applied to different scenarios, thereby improving the practicability and flexibility of the device.

[0032] In one embodiment of the present invention, see Figure 1-Figure 8 , the number of the second close-fitting protective sleeves 23 is multiple, and the multiple second close-fitting protective sleeves 23 are evenly distributed in the protective sleeve 6; An annular partition plate 24 is provided between the adjacent second protective sleeves 23 , and the annular partition plate 24 is fixedly connected to the inner wall of the protective sleeve 6 .

[0033] By providing a plurality of close-fitting protective sleeves 23, the safety of the protective sleeve 6 during use can be further ensured to avoid the entire protective sleeve 6 being in a non-sealed state due to one or more damaged parts, which will not be described in detail here.

[0034] In one embodiment of the present invention, see Figure 1-Figure 8 , the adsorption protection component comprises: An adsorption control box 9, wherein the adsorption control box 9 is fixedly connected to the protective sleeve 6; An inspection cover 10, wherein the inspection cover 10 is detachably connected to the adsorption control box 9, and a suction port 11 is also provided on the inspection cover 10; And a connecting part 27, both ends of which are fixedly connected to the adsorption control box 9 and the close-fitting protective sleeve 22 respectively, and the connecting part 27 is also connected to the suction port 11 and the close-fitting protective sleeve 22 respectively.

[0035] The segmented tightening assembly comprises: A tightening and reinforcing box 8, wherein the number of the tightening and reinforcing boxes 8 is two, and the two tightening and reinforcing boxes 8 are symmetrically mounted on the protective sleeve 6, and a plurality of baffle plates 13 are fixedly mounted on the tightening and reinforcing box 8; A tightening accommodating ring 7, wherein the number of the tightening accommodating rings 7 is multiple, and the multiple tightening accommodating rings 7 are distributed on the protective sleeve 6 and fixedly connected to the tightening reinforcement box 8; And a rotating tightening unit, which is respectively connected to the tightening accommodating ring 7 and the tightening reinforcement box 8, and is respectively detachably connected to the tight protective sleeve 1 22 and the tight protective sleeve 2 23.

[0036] The rotary tightening unit comprises: A manual tightening screw head 14, wherein the number of the manual tightening screw heads 14 is multiple, and the multiple manual tightening screw heads 14 are all rotatably mounted on the tightening and reinforcement box 8, wherein two manual tightening screw heads 14 form a pair, and the two pairs of manual tightening screw heads 14 are respectively mounted on two tightening and reinforcement boxes 8 and are arranged opposite to each other; A tightening rope 25, wherein the tightening rope 25 is wound around the close-fitting protective sleeve 22, and the two ends of the tightening rope 25 are respectively connected to two manual tightening screw heads 14 arranged opposite to each other; And a tightening rope 26, the tightening rope 26 is wound around the tight protective sleeve 23, and the two ends of the tightening rope 26 are respectively connected to the other two manual tightening screw heads 14 arranged opposite to each other, wherein the tightening rope 1 25 and the tightening rope 2 26 are respectively located on both sides of the annular partition 24.

[0037] When two replacement joints 5 are connected or replacement joint 5 is connected to protective joint 1 (at this time, adjacent replacement joints 5 or replacement joint 5 and protective joint 1 are in a sealed state), a suction device is inserted into the suction port 11 to suck the air in the close-fitting protective sleeve 1 22 and the close-fitting protective sleeve 2 23. Under the action of air pressure, close-fitting protective sleeve 1 22 and close-fitting protective sleeve 2 23 are pressed against the cable (i.e., on the surface of the cable of a certain length on both sides of the joint). At this time, manpower rotates a plurality of manual tightening knobs 14 in sequence, wherein the manual tightening knob 14 can be in the form of a screw, and the tightening rope 1 25 and the tightening rope 2 26 are wound around the screw. Then, during the rotation of the manual tightening knob 14, the tightening rope 1 25 and the tightening rope 2 26 can be wound around the screw under the action of continuous winding. The second 26 will tighten the close-fitting protective sleeve 1 22 and the close-fitting protective sleeve 23 on both sides of the annular partition 24. If multiple close-fitting protective sleeves 23 are set, the close-fitting protective sleeves 23 on both sides of the annular partition 24 will also be tightened. On the one hand, it can further ensure the sealing protection of the protective sleeve 6 to the cable. On the other hand, when a certain part is damaged, the close-fitting protective sleeve 1 22 or other close-fitting protective sleeves 23 can always remain in a sealed state, so that under the effect of segmented protection, the cable joint can always be used in a safe environment. Of course, the manual tightening rotary head 14 can also adopt other structures, as long as the tightening rope 1 25 and the tightening rope 26 wrapped around the close-fitting protective sleeve 1 22 and the close-fitting protective sleeve 23 can be tightened during rotation or other movements, and no further details will be given here.

[0038] In one embodiment of the present invention, see Figure 1-Figure 8 , further comprising: a second connecting portion 29, wherein the second connecting portion 29 is fixedly connected to the second close-fitting protective sleeve 23 and communicates with the second close-fitting protective sleeve 23; A temperature detection controller 28, wherein the temperature detection controller 28 is fixedly mounted on the inner wall of the protective sleeve 6 and is electrically connected to the solenoid valve on the second connecting portion 29; And an air vent portion 12 , wherein the air vent portion 12 is opened on the inspection cover 10 and is connected to the second connecting portion 29 .

[0039] During the use of the cable, when overheating occurs near the cable joint, at this time, since the close-fitting protective sleeve 1 22 and multiple close-fitting protective sleeves 2 23 are tightly wrapped on the cable, it is not conducive to heat dissipation. Therefore, when the temperature detection controller 28 detects that the temperature is too high, it will make the connecting part 29 on a certain section or several sections of the close-fitting protective sleeve 23 in a connected state (especially a section of cable with the largest heat generation). After the solenoid valve on the connecting part 29 is opened, under the action of air pressure, external air will enter the connecting part 29 through the venting port 12, and then enter the close-fitting protective sleeve 23, so that the close-fitting protective sleeve 2 23 is restored to a fluffy state, thereby facilitating rapid heat dissipation of a certain section or several sections of the cable. No further details will be given here.

[0040] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cable joint insulating sheath, comprising a replacement joint, wherein the replacement joint is also provided with a detachable connection portion, characterized in that: Also includes: A protective sleeve, wherein the protective sleeve is fixedly connected to the replacement joint, and a first close-fitting protective sleeve and a second close-fitting protective sleeve are arranged in the protective sleeve; Among them, one end of the close-fitting protective sleeve 1 is fixedly connected to the inner wall of the replacement joint, the other end of the close-fitting protective sleeve 1 is fixedly connected to the inner wall of the protective sleeve, and both ends of the close-fitting protective sleeve 2 are fixedly connected to the inner wall of the protective sleeve; and a protection control mechanism, the protection control mechanism is respectively connected to the protection sleeve, the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2, wherein the protection control mechanism includes an adsorption protection component and a segmented tightening component; The adsorption protection component is connected to the protection sleeve and is in communication with the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2. The segmented tightening component is connected to the protection sleeve and is detachably connected to the close-fitting protection sleeve 1 and the close-fitting protection sleeve 2.

2. The cable joint insulating sheath according to claim 1, characterized in that: The number of the replacement joints, protective sleeves and protection control mechanisms are two sets, and the two sets of replacement joints are connected by locking screws; A sealing ring is also arranged between the two replacement joints, a transition hole is also opened on the replacement joint, the diameter of the transition hole is smaller than the inner diameter of the replacement joint, and a plurality of limit grooves are also opened on the transition hole.

3. The cable joint insulating sheath according to claim 1, characterized in that: Also includes: A protective joint, the protective joint is detachably connected to the replacement joint, and a plurality of limiting grooves 2 are provided on the protective joint; An annular groove, the annular groove is provided on the protective joint; And a sealing locking assembly, wherein the sealing locking assembly is fixedly connected to the protective joint.

4. The cable joint insulating sheath according to claim 3, characterized in that: The sealing and locking assembly comprises: A soft clinging portion, wherein the soft clinging portion is fixedly connected to the protective joint; A limiting convex portion, the limiting convex portion is fixedly mounted on the other end of the soft close-fitting portion; And a locking ring sleeve, wherein the locking ring sleeve is detachably connected to the soft abutting portion.

5. The cable joint insulating sheath according to claim 1 or 4, characterized in that: There are multiple second close-fitting protective sleeves, and the multiple second close-fitting protective sleeves are evenly distributed in the protective sleeve; An annular partition is arranged between the two adjacent close-fitting protective sleeves, and the annular partition is fixedly connected to the inner wall of the protective sleeve.

6. The cable joint insulating sheath according to claim 5, characterized in that: The adsorption protection component comprises: An adsorption control box, wherein the adsorption control box is fixedly connected to the protective sleeve; An inspection cover, the inspection cover is detachably connected to the adsorption control box, and a suction port is also provided on the inspection cover; And a connecting part one, the two ends of which are respectively fixedly connected to the adsorption control box and the close-fitting protective sleeve one, and the connecting part one is also respectively connected to the suction port and the close-fitting protective sleeve one.

7. The cable joint insulating sheath according to claim 6, characterized in that: The segmented tightening assembly comprises: A tightening and reinforcing box, wherein the number of the tightening and reinforcing boxes is two, the two tightening and reinforcing boxes are symmetrically mounted on the protective sleeve, and a plurality of baffle plates are fixedly mounted on the tightening and reinforcing box; A tightening and accommodating ring, wherein the number of the tightening and accommodating rings is multiple, and the multiple tightening and accommodating rings are distributed on the protective sleeve and fixedly connected to the tightening and reinforcing box; And a rotating tightening unit, which is respectively connected to the tightening accommodating ring and the tightening reinforcement box, and is respectively detachably connected to the tight protective sleeve 1 and the tight protective sleeve 2.

8. The cable joint insulating sheath according to claim 7, characterized in that: The rotary tightening unit comprises: A manual tightening screw head, wherein the number of the manual tightening screw heads is multiple, and the multiple manual tightening screw heads are all rotatably mounted on the tightening and reinforcement box, wherein two manual tightening screw heads form a pair, and the two pairs of manual tightening screw heads are respectively mounted on two tightening and reinforcement boxes and are arranged opposite to each other; A tightening rope 1, wherein the tightening rope 1 is wound around the close-fitting protective sleeve 1, and the two ends of the tightening rope 1 are respectively connected to two manual tightening rotary heads arranged opposite to each other; And a second tightening rope, wherein the second tightening rope is wound around the second tight protective sleeve, and the two ends of the second tightening rope are respectively connected to the other two manual tightening rotary heads arranged opposite to each other, wherein the first tightening rope and the second tightening rope are respectively located on both sides of the annular partition.

9. The cable joint insulating sheath according to claim 6, characterized in that: Also includes: A second connecting portion, wherein the second connecting portion is fixedly connected to the second close-fitting protective sleeve and communicates with the second close-fitting protective sleeve; A temperature detection controller, which is fixedly mounted on the inner wall of the protective sleeve and electrically connected to the solenoid valve on the second connecting portion; And an air vent portion, wherein the air vent portion is arranged on the inspection cover and is communicated with the second connecting portion.

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