Combined cable joint protection device

Abstract

The invention relates to a combined cable joint protection device. The outer side of a fastening block is in threaded connection with a fastening cover; a connecting rod is fixedly connected into the protective shell I or the protective shell II, and a conducting ring I and a conducting ring II which are matched in an inserting manner are arranged on the connecting rod; the thermosensitive assembly deforms according to heat on the first conducting ring and the second conducting ring, and when the temperature is larger than a set threshold value, the thermosensitive assembly executes the action of pushing the first conducting ring and the second conducting ring to conduct clamping; according to the invention, the problem of poor contact after long-term use due to the fact that the joint part adopts a cable body direct connection mode in the prior art is solved; through the cooperation of the conductive ring I and the conductive ring II, the current at the cable joint is stably transmitted, the contact resistance and local heating can be reduced through the tight fit of the conductive ring I and the conductive ring II, and meanwhile, under the action of the fastening cover, the fastening block and the rubber gasket, the cable body can be stably fixed, and the sealing performance at the joint can be enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable accessory, in particular to a combined cable joint protection device. BACKGROUND

[0002] The combined cable joint protection device can protect the cable joint in all directions, is usually composed of a high-strength shell and modules such as flame-retardant and sealing, can prevent water, explosion and fire, can adapt to different cable specifications, and is convenient to install, effectively reduces the risk of accidents, and prolongs the service life of the cable.

[0003] The combined cable joint protection device currently used cooperates with multiple modules to realize closed-loop protection of the cable joint, and also avoids damage of the joint caused by environmental or physical factors, thereby ensuring the working efficiency of the cable and prolonging the service life of the cable.

[0004] Although the combined cable joint protection device currently used cooperates with multiple modules to realize efficient protection of the cable and ensure the working efficiency, the cable body is usually connected at the connection, and such a connection mode may cause aging of the connection after long-term use, thereby causing poor contact and even short circuit, power failure and other faults. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a combined cable joint protection device to solve the above problems.

[0006] The present application provides the following technical solutions: A combined cable joint protection device, comprising a protection shell one and a protection shell two, the protection shell one and the protection shell two are hingedly connected to form a containing space for accommodating a cable body, two fastening blocks are fixedly connected to the outer sides of the protection shell one and the protection shell two, and a fastening cover is threadedly connected to the outer side of the fastening block; a connecting rod is fixedly connected inside the protection shell one or the protection shell two, and a conductive ring one and a conductive ring two in plug-in cooperation are arranged on the connecting rod. A heat-sensitive component deforms according to the heat on the conductive ring one and the conductive ring two, and performs a clamping action of pushing the conductive ring one and the conductive ring two when the temperature is greater than a set threshold.

[0007] Preferably, a sealing layer and a fireproof layer are arranged inside the protection shell one and the protection shell two, and the sealing layer is located outside the fireproof layer.

[0008] Preferably, mounting grooves are formed in the middle of the conductive ring one and the conductive ring two, and the cable body is located inside the mounting grooves.

[0009] Preferably, the conductive ring two is provided with a clamping groove in the middle, and the conductive ring one is provided with a clamping groove at one end.

[0010] Preferably, the thermal sensitive assembly comprises two symmetrically arranged protrusions and a threaded rod arranged at one end of the conductive ring one, and a gap is left between the two symmetrically arranged protrusions and the size of the gap is controlled by the threaded rod.

[0011] Preferably, the thermal sensitive assembly further comprises a fixed sawtooth ring, a movable sawtooth ring and a coil spring, an active hole is arranged on the outer wall of the protrusion, the inner wall of the active hole is provided with the fixed sawtooth ring, the fixed sawtooth ring is unidirectionally rotatably connected with the movable sawtooth ring, the coil spring is arranged in the inner wall of the movable sawtooth ring, the coil spring adopts a bimetallic strip structure, and the threaded rod and the movable sawtooth ring are connected through a pull rope.

[0012] Preferably, the inner wall of the movable sawtooth ring is provided with a friction layer.

[0013] Preferably, the outer wall of the protrusion is provided with a wire slot for accommodating the pull rope.

[0014] Preferably, the outer side of the protective shell one is fixedly connected with a fixed block, the inner side of the fixed block is fixedly connected with a rotating rod, the outer side of the protective shell two is fixedly connected with a clamping block, and the clamping block is rotatably connected to the outer side of the rotating rod.

[0015] Preferably, the inner side of the fastening block is provided with a rubber gasket.

[0016] The present application has the following beneficial technical effects: The present application improves the problem of poor contact after long-term use in the prior art due to the direct connection of the joint part with the cable body. Through the cooperation of the conductive ring one and the conductive ring two, the current at the cable joint is stably transmitted, the close contact between the two can reduce the contact resistance and local heating, and under the action of the fastening cover, the fastening block and the rubber gasket, the cable body can be stably fixed, and the sealing property of the connection part can be enhanced.

[0017] Under the action of the sealing layer and the fireproof layer, the protection device can tightly isolate the external water vapor, dust and corrosive substances, avoid the penetration into the joint, block the flame spread in case of fire, provide double safety protection for the cable joint, and ensure the stable operation of the cable.

[0018] When the connection at the cable joint is poor, the temperature rises and exceeds the set threshold of the thermal sensitive assembly, and the thermal sensitive assembly deforms to perform the clamping action of the conductive ring one and the conductive ring two. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic view of the present application. Figure 2 Fig. 1 is a schematic view of the fastening cover block and the fastening cover structure of the present application; Figure 3 Fig. 2 is a schematic view of the cross section of the sealing layer of the present application; Figure 4 Fig. 3 is a schematic view of the protection shell one and two of the present application after being connected together; Figure 5 Fig. 4 is a schematic view of the structure of the rotating rod of the present application; Figure 6 Fig. 5 is a schematic view of the structure of the rotating rod of the present application; Figure 7 Fig. 6 is a schematic view of the structure of the rotating rod of the present application; Figure 8 Fig. 7 is a schematic view of the structure of the rotating rod of the present application; Figure 9 Fig. 8 is a schematic view of the structure of the rotating rod of the present application.

[0020] The reference signs in the drawings are as follows: 1, protection shell one; 2, protection shell two; 3, fastening cover; 4, cable body; 5, fastening block; 6, clamping block; 7, conductive ring one; 71, protruding part; 711, wire slot; 712, movable hole; 72, threaded rod; 73, fixed sawtooth ring; 74, movable sawtooth ring; 75, coil spring; 8, conductive ring two; 9, sealing layer; 10, fireproof layer; 11, connecting rod; 12, connecting slot; 13, rubber washer; 14, fixed block; 15, rotating rod; 16, mounting slot; 17, clamping slot. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Embodiment one: A combined cable joint protection device, referring to Figures 1-9 , comprises a protection shell one 1, the protection shell one 1 is rotatably connected with a protection shell two 2 through a hinge on one side, the inner sides of the protection shell one 1 and the protection shell two 2 are both provided with connecting slots 12 to form a containing space for accommodating a cable body 4, the protection shell one 1 and the protection shell two 2 provide the first layer of protection, and at the same time provide installation conditions for the internal and external structures, the outer sides of the protection shell one 1 and the protection shell two 2 are both fixedly connected with two fastening blocks 5 on the left and right ends, and the two fastening blocks 5 on the same side of the protection shell one 1 and the protection shell two 2 cooperate to form a structure that is screwed with a fastening cover 3.

[0023] The fastening cover 3 is screwed with the two fastening blocks 5 on the same side to clamp and fix the protective shell one 1 and the protective shell two 2, the cable body 4 can pass through the middle part of the structure after the two fastening blocks 5 are connected into one, and the cable body 4 can be stably fixed in the device through the fastening block 5 and the fastening cover 3, so as to avoid loosening of the cable body 4 during connection, the cable body 4 is located in the middle part of the protective shell one 1 and the protective shell two 2, two connecting rods 11 are fixedly connected in the protective shell one 1, the cable body 4 can be stably connected in the device through the connecting rod 11, the protective shell one 1 and the protective shell two 2 are internally provided with the conductive ring one 7 and the conductive ring two 8, the conductive ring one 7 and the conductive ring two 8 are relatively moved under the guidance of the connecting rod 11, the current at the connection of the cable body 4 is stably transmitted through the conductive ring one 7 and the conductive ring two 8, the conductive ring one 7 and the conductive ring two 8 are located between the two connecting rods 11, and the cable body 4 is accurately inserted into the conductive ring one 7 and the conductive ring two 8 through the connecting rod 11.

[0024] The protective shell one 1 and the protective shell two 2 are internally provided with a sealing layer 9 and a fireproof layer 10, the sealing layer 9 is located outside the fireproof layer 10, the sealing layer 9 can effectively prevent external impurities such as water, gas and dust from entering the joint, and can resist high temperature under the action of the fireproof layer 10, thereby ensuring the fire safety of the cable, the conductive ring one 7 and the conductive ring two 8 are located inside the sealing layer 9, the conductive ring one 7 and the conductive ring two 8 are provided with installation grooves 16 in the middle parts, the cable body 4 is located inside the installation grooves 16, the cable body 4 is clamped with the installation grooves 16, and the cable body 4 is stably connected with the conductive ring one 7 and the conductive ring two 8 through the clamping of the cable body 4 and the installation grooves 16, thereby ensuring the stable transmission of current at the joint.

[0025] The conductive ring two 8 is provided with a clamping groove 17 in the middle part, the conductive ring one 7 is clamped with the clamping groove 17, the connection between the conductive ring one 7 and the conductive ring two 8 is more close through the clamping of the conductive ring one 7 and the clamping groove 17, thereby ensuring the stable transmission of current between the conductive ring one 7 and the conductive ring two 8, and improving the sealing performance, effectively preventing external erosion, the protective shell one 1 is fixedly connected with a fixed block 14 outside, the fixed block 14 is fixedly connected with a rotating rod 15 inside, the rotating rod 15 is stably connected to the outside of the protective shell one 1 through the fixed block 14, the protective shell two 2 is fixedly connected with a clamping block 6 outside, the clamping block 6 is rotatably connected to the outside of the rotating rod 15, the protective shell one 1 and the protective shell two 2 are rotatably connected through the rotating connection of the clamping block 6 and the rotating rod 15, the fastening block 5 is internally provided with a rubber gasket 13, the fastening block 5 can more closely clamp the cable body 4 through the rubber gasket 13, thereby effectively improving the fixation of the cable body 4, and preventing external dust from entering the device through the connecting groove 12.

[0026] Working principle: first twist the fastening cover 3 on both sides outward, twist the fastening cover 3 off from the fastening block 5, then insert the cable body 4 into the installation slot 16 in the middle of the conductive ring one 7 and the conductive ring two 8, and push the conductive ring one 7 and the card slot 17 to be mutually clamped, then align the fastening cover 3 on both sides with the fastening block 5, and twist the fastening cover 3 inward after alignment, the fastening block 5 is gradually clamped inward under the action of the fastening cover 3 and the rubber gasket 13, until the cable body 4 is stably fixed inside the device, finally turn on the power, the current is transmitted to the conductive ring one 7 or the conductive ring two 8 through the cable body 4 on one side, and is stably transmitted to the cable body 4 on the other side through the mutual transmission of the conductive ring one 7 and the conductive ring two 8, at this time, the stable installation of the cable joint is completed, and the stable transmission of the current is ensured.

[0027] The device is isolated from large external objects by the protection shell one 1 and the protection shell two 2, is isolated from small external objects such as external gas and dust by the sealing layer 9, and finally resists high temperature invasion and inhibits flame spread through the fireproof layer 10, so as to ensure the stable operation of the joint.

[0028] Another embodiment, the difference is that: As Figures 6-9 shown, the thermal sensitive assembly includes two symmetrically arranged protruding parts 71, a threaded rod 72, a fixed sawtooth ring 73, a movable sawtooth ring 74, a coil spring 75 and a pull rope; The two symmetrically arranged protruding parts 71 are spaced apart for deformation, and the two symmetrically arranged protruding parts 71 are used as the end of the conductive ring one 7 for insertion into the card slot 17 of the matching conductive ring two 8, and the protruding part 71 has a certain elastic ability in the form of a cantilever beam.

[0029] One end of the threaded rod 72 is threaded through one group of protruding parts 71 and is rotatably connected with the other group of protruding parts 71, so as to realize that the threaded rod 72 rotates to drive the two groups of protruding parts 71 to approach or move away from each other.

[0030] An active hole 712 is formed in the outer wall of the protruding part 71, a fixed sawtooth ring 73 is fixedly arranged on the inner wall of the active hole 712, a movable sawtooth ring 74 is rotatably connected in the active hole 712, the fixed sawtooth ring 73 and the movable sawtooth ring 74 are coaxially arranged and engaged, the movable sawtooth ring 74 has a certain elastic deformation ability, and the fixed sawtooth ring 73 and the movable sawtooth ring 74 can realize one-way rotation; The pull rope (as shown by the red line in Figure 8 ) is wound around one end of the threaded rod 72, and the other end is connected with the movable sawtooth ring 74; The movable hole 712 is internally provided with a coil spring 75, the coil spring 75 is integrally or terminally provided with a bimetallic strip structure, the terminal end of the coil spring 75 abuts against the inner side wall of the movable sawtooth ring 74, the inner side wall of the movable sawtooth ring 74 is provided with a friction layer to improve the friction, the bimetallic strip structure is deformed differently by heat, and then the coil spring 75 is deformed and elongated by heat.

[0031] Working principle: When the electrically conductive ring one 7 and the electrically conductive ring two 8 are in poor contact, the temperature at the connection is increased to exceed the threshold value, the coil spring 75 with the bimetallic strip structure is heated and elongated, the terminal end of the coil spring 75 is elongated to push the movable sawtooth ring 74 to rotate by the friction force, the movable sawtooth ring 74 rotates to drive the threaded rod 72 to rotate by a certain angle, and then the distance between the two symmetrically arranged protruding portions 7 is increased by a certain distance, so that the two protruding portions 7 at the end of the electrically conductive ring one 7 are in closer contact with the clamping groove 17 of the electrically conductive ring two 8.

[0032] The fixed sawtooth ring 73 and the movable sawtooth ring 74 are in one-way engagement, and have a minimum span, under normal heating conditions, the length of the coil spring 75 deformed by heat is not enough to push the movable sawtooth ring 74 to rotate by a minimum angle relative to the fixed sawtooth ring 73.

[0033] In another embodiment, one end of the electrically conductive ring one 7 is used to be inserted into the clamping groove 17 of the electrically conductive ring two 8, the other end of the electrically conductive ring one 7 is provided with two protruding portions 71, and the two protruding portions 71 clamp the cable body 4 therein; at the same time, the other end of the electrically conductive ring two 8 away from the clamping groove 17 is also provided with two protruding portions 71 for clamping the cable body 4 therein.

[0034] When the contact is poor, the threaded rod 72 is rotated by a certain angle, and the distance between the two symmetrically arranged protruding portions 7 is reduced to further clamp the cable body 4 therein.

[0035] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A combined cable joint protection device, comprising a first protective shell (1) and a second protective shell (2), wherein the first protective shell (1) and the second protective shell (2) are hinged together to form an accommodating space for accommodating a cable body (4), and two fastening blocks (5) are fixedly connected to the outer sides of both the first protective shell (1) and the second protective shell (2), and fastening covers (3) are threadedly connected to the outer sides of the fastening blocks (5), characterized in that: A connecting rod (11) is fixedly connected inside the first protective shell (1) or the second protective shell (2), and a conductive ring (7) and a conductive ring (8) are provided on the connecting rod (11) for plugging and mating. The thermal component, based on the heat deformation on conductive ring one (7) and conductive ring two (8), performs a clamping action by pushing conductive ring one (7) and conductive ring two (8) when the temperature is greater than a set threshold.

2. The combined cable joint protection device according to claim 1, characterized in that, The protective shell one (1) and the protective shell two (2) are provided with a sealing layer (9) and a fireproof layer (10) inside, and the sealing layer (9) is located outside the fireproof layer (10).

3. The combined cable joint protection device according to claim 1, characterized in that, Both the first conductive ring (7) and the second conductive ring (8) have mounting grooves (16) in the middle, and the cable body (4) is located inside the mounting grooves (16).

4. A combined cable joint protection device according to claim 1, characterized in that, The conductive ring 2 (8) has a slot (17) in the middle, and one end of the conductive ring 1 (7) is provided to engage with the slot (17).

5. A combined cable joint protection device according to claim 4, characterized in that, The thermal component includes two symmetrically arranged protrusions (71) and a threaded rod (72) disposed at one end of the conductive ring (7). A gap is left between the two symmetrically arranged protrusions (71) and the size of the gap is controlled by the threaded rod (72).

6. A combined cable joint protection device according to claim 5, characterized in that, The thermal component also includes a fixed serrated ring (73), a movable serrated ring (74), and a coil spring (75). A movable hole (712) is provided on the outer wall of the protrusion (71), and a fixed serrated ring (73) is provided on the inner wall of the movable hole (712). The fixed serrated ring (73) and the movable serrated ring (74) are unidirectionally rotated together. The coil spring (75) is located inside the movable serrated ring (74). The coil spring (75) adopts a bimetallic strip structure. The threaded rod (72) and the movable serrated ring (74) are connected by a pull rope.

7. A combined cable joint protection device according to claim 6, characterized in that, The inner wall of the movable sawtooth ring (74) is provided with a friction layer.

8. A combined cable joint protection device according to claim 6, characterized in that, The outer wall of the protrusion (71) is provided with a groove (711) for accommodating the pull rope.

9. A combined cable joint protection device according to claim 1, characterized in that, A fixing block (14) is fixedly connected to the outside of the first protective shell (1), and a rotating rod (15) is fixedly connected to the inside of the fixing block (14). A locking block (6) is fixedly connected to the outside of the second protective shell (2), and the locking block (6) is rotatably connected to the outside of the rotating rod (15).

10. A combined cable joint protection device according to claim 1, characterized in that, A rubber gasket (13) is installed on the inner side of the fastening block (5).

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