Protective tube for building electrical cable wall penetration

Abstract

The utility model provides a protection tube for building electrical cable wall penetration, comprising a first wall penetration sleeve and a second wall penetration sleeve, one end of the second wall penetration sleeve far away from the first wall penetration sleeve is fixedly provided with a connection tube, and one end of the connection tube and one end of the first wall penetration sleeve far away from the second wall penetration sleeve are provided with a joint protection device. A sealing ring and a threaded ring are fixedly installed in the end, close to the second wall bushing, of the first wall bushing, and a limiting ring is rotationally installed at the end, away from the connecting pipe, of the second wall bushing. According to the utility model, the first wall bushing, the second wall bushing and the connecting pipe pass through the wall preformed holes through the arranged joint protection device, and then the limiting sleeve is arranged at one end, far away from each other, of the first wall bushing and the connecting pipe through the groove; therefore, when the electrical cable is installed, the friction between the skin of the electrical cable and the port of the wall bushing can be reduced, and the skin damage phenomenon after the electrical cable is installed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical pipes, in particular to a protective pipe for building electrical cables to pass through walls. Background Art

[0002] During the installation process, electrical pipelines are generally installed in protective tubes to protect the electrical pipelines. Electrical wall bushings are also called civil air-defense wall-penetrating closed ribs, electrical cable protection bushings, electrical bushings, electrical pre-buried bushings, rigid combination bushings, etc. Electrical wall bushings are suitable for use when multiple different calibers or the same caliber are inserted into the wall for pre-buried use at the same time.

[0003] At present, after the electrical wall bushing passes through the wall, cement is generally poured between the reserved hole in the wall and the bushing to fix it, or the bushing is fixed to the wall by bolts in combination with a metal plate. The applicant believes that the cement pouring method in the above-mentioned bushing fixing method increases the material, while the bolt fixing method damages the wall. In addition, since the ends of the bushing are relatively sharp, when the electrical cable passes through the bushing, the outer sheath of the electrical cable will rub against the ends of the bushing, thereby damaging the outer sheath of the electrical cable.

[0004] Therefore, in response to the above problems, we propose a protective tube for building electrical cables to pass through walls. Utility Model Content

[0005] The utility model aims to provide a protective tube for building electrical cables to penetrate walls, so as to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective tube for building electrical cables to penetrate walls, comprising a first wall sleeve and a second wall sleeve, a connecting tube being fixedly installed at one end of the second wall sleeve away from the first wall sleeve, a joint protection device being provided at the connecting tube and the end of the first wall sleeve away from the second wall sleeve, a sealing ring and a threaded ring being fixedly installed inside one end of the first wall sleeve close to the second wall sleeve, a limiting ring being rotatably installed at one end of the second wall sleeve away from the connecting tube, and a first telescopic rod and a second telescopic rod being installed between the limiting ring and the threaded ring.

[0007] As a further description of the utility model: the joint protection device includes a limit sleeve, which is in the shape of a circular ring. A circular groove is provided on the outer wall of the limit sleeve on one side close to the first wall sleeve. The limit sleeve is threadedly connected to the first wall sleeve and the connecting pipe through the groove.

[0008] As a further description of the utility model: a connecting ring is arranged inside the limiting sleeve, two groups of rings are arranged on the rotating sleeve of the connecting ring, two groups of fixing blocks are fixedly installed on the connecting ring, and the two groups of fixing blocks and the rings are staggered, and the connecting ring is fixedly connected to the limiting sleeve through the fixing blocks.

[0009] As a further description of the utility model: the sealing ring is made of rubber, the outer diameter of the sealing ring and the threaded ring matches the inner diameter of the first wall sleeve, the inner diameter of the sealing ring matches the outer diameter of the second wall sleeve, and the second wall sleeve is slidably connected to the sealing ring.

[0010] As a further description of the present invention: a thread matching the threaded ring is formed on the outer wall of one end of the second wall sleeve away from the connecting pipe, and the second wall sleeve is threadedly connected to the threaded ring.

[0011] As a further description of the utility model: the outer diameter of the limit ring is smaller than the inner diameter of the first wall sleeve, the first telescopic rod and the second telescopic rod are slidably connected, and a spring that can be compressed by the second telescopic rod is installed inside the first telescopic rod, and the ends of the first telescopic rod and the second telescopic rod that are away from each other are fixedly connected to the limit ring and the threaded ring respectively.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] (1) The utility model is provided with a first wall bushing, a second wall bushing, a connecting pipe and a joint protection device. When in use, the first wall bushing, the second wall bushing and the connecting pipe are passed through the reserved hole in the wall, and then the limiting sleeve is installed at the end of the first wall bushing and the connecting pipe that are away from each other through the groove. Because a rotatable ring is installed inside the limiting sleeve, the friction between the surface of the electrical cable and the end of the wall bushing can be reduced when installing the electrical cable, thereby reducing the damage to the surface of the electrical cable after installation.

[0014] (2) The utility model is provided with a first wall penetration sleeve, a second wall penetration sleeve, a connecting pipe, a threaded ring, a limit ring, a first telescopic rod and a second telescopic rod. When in use, the second wall penetration sleeve is slid along the first wall penetration sleeve until the thread on the second wall penetration sleeve contacts the threaded ring, and the second wall penetration sleeve is rotated to fix the length of the first wall penetration sleeve and the second wall penetration sleeve. Then, the sleeve is passed through the wall. When the electrical cable is passed through the wall and the first wall penetration sleeve and the connecting pipe are sealed, the second wall penetration sleeve is rotated in the opposite direction. The second wall penetration sleeve is retracted into the first wall penetration sleeve under the elastic force of the spring inside the first telescopic rod, and the two sets of limit sleeves are driven to fit the wall surface, thereby reducing the damage to the wall when the pipeline is fixed to the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall explosion three-dimensional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the joint protection device of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the limit sleeve of the utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the first wall bushing of the utility model;

[0020] Figure 6 It is a schematic diagram of the sealing ring and threaded ring structure of the utility model.

[0021] In the figure: 1. first wall sleeve; 2. second wall sleeve; 3. connecting pipe; 4. joint protection device; 401. limiting sleeve; 402. groove; 403. connecting ring; 404. sleeve ring; 405. fixing block; 5. sealing ring; 6. threaded ring; 7. limiting ring; 8. first telescopic rod; 9. second telescopic rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 6 The utility model provides a protective tube for building electrical cables to penetrate walls, comprising a first wall bushing 1 and a second wall bushing 2, a connecting tube 3 is fixedly installed at one end of the second wall bushing 2 away from the first wall bushing 1, a joint protection device 4 is provided at the connecting tube 3 and the end of the first wall bushing 1 away from the second wall bushing 2, a sealing ring 5 and a threaded ring 6 are fixedly installed inside one end of the first wall bushing 1 close to the second wall bushing 2, a limiting ring 7 is rotatably installed at one end of the second wall bushing 2 away from the connecting tube 3, and a first telescopic rod 8 and a second telescopic rod 9 are installed between the limiting ring 7 and the threaded ring 6.

[0024] In this embodiment: the joint protection device 4 includes a limiting sleeve 401, which is in a circular ring shape. A circular groove 402 is provided on the outer wall of the limiting sleeve 401 close to the first wall sleeve 1. The limiting sleeve 401 is threadedly connected to the first wall sleeve 1 and the connecting pipe 3 through the groove 402.

[0025] During specific use: the limiting sleeve 401 makes the first wall sleeve 1 and the second wall sleeve 2 fit the wall when they are contracted, so as to prevent the first wall sleeve 1 and the second wall sleeve 2 from completely entering the wall after contraction.

[0026] In this embodiment: a connecting ring 403 is arranged inside the limiting sleeve 401, two groups of rings 404 are rotatably sleeved on the connecting ring 403, two groups of fixing blocks 405 are fixedly installed on the connecting ring 403, and the two groups of fixing blocks 405 and the rings 404 are staggered, and the connecting ring 403 is fixedly connected to the limiting sleeve 401 through the fixing blocks 405.

[0027] During specific use: the ring 404 can rotate on the connecting ring 403, and the ring 404 can reduce the friction between the electrical cable and the sleeve port when passing through the first wall sleeve 1, the second wall sleeve 2 and the connecting pipe 3, thereby reducing the surface wear of the electrical cable.

[0028] In this embodiment: the sealing ring 5 is made of rubber, the outer diameter of the sealing ring 5 and the threaded ring 6 matches the inner diameter of the first wall sleeve 1, the inner diameter of the sealing ring 5 matches the outer diameter of the second wall sleeve 2, and the second wall sleeve 2 is slidably connected to the sealing ring 5.

[0029] During specific use: the sealing ring 5 can seal the interior of the first wall sleeve 1 to prevent leakage of the wall pipe during the sealing process.

[0030] In this embodiment, a thread matching the threaded ring 6 is formed on the outer wall of one end of the second wall sleeve 2 away from the connecting pipe 3 , and the second wall sleeve 2 is threadedly connected to the threaded ring 6 .

[0031] During specific use: the threaded ring 6 can fix the extended length of the first wall sleeve 1 and the second wall sleeve 2 to prevent automatic resetting, and the extended first wall sleeve 1 and the second wall sleeve 2 can easily pass through the wall and facilitate the subsequent pipeline sealing operation.

[0032] In this embodiment: the outer diameter of the limit ring 7 is smaller than the inner diameter of the first wall sleeve 1, the first telescopic rod 8 and the second telescopic rod 9 are slidably connected, and a spring that can be compressed by the second telescopic rod 9 is installed inside the first telescopic rod 8, and the ends of the first telescopic rod 8 and the second telescopic rod 9 that are away from each other are fixedly connected to the limit ring 7 and the threaded ring 6 respectively.

[0033] During specific use: the second telescopic rod 9 can slide inside the first telescopic rod 8, and when the first wall sleeve 1 and the second wall sleeve 2 are extended, the spring can be stretched, and when the first wall sleeve 1 and the second wall sleeve 2 are shortened, they can automatically reset under the elastic force of the spring.

[0034] Working principle: When in use, first remove the joint protection device 4 at both ends of the first wall sleeve 1 and the connecting pipe 3, then slide the second wall sleeve 2 along the first wall sleeve 1 until the thread opened on the second wall sleeve 2 contacts the thread ring 6, rotate the second wall sleeve 2 to fix the length of the first wall sleeve 1 and the second wall sleeve 2, then pass the first wall sleeve 1, the second wall sleeve 2 and the connecting pipe 3 through the reserved hole in the wall, so that the ends of the first wall sleeve 1 and the connecting pipe 3 that are away from each other are respectively located on both sides of the wall, and then pass the limit sleeve 401 through the groove 4 02 is installed at the end where the first wall sleeve 1 and the connecting pipe 3 are away from each other. Since a rotatable ring 404 is installed inside the limiting sleeve 401, the friction between the surface of the electrical cable and the end of the wall sleeve can be reduced when the electrical cable is installed, and the damage to the surface of the electrical cable after installation can be reduced. When the electrical cable is finished passing through the wall and the first wall sleeve 1 and the connecting pipe 3 are sealed, the second wall sleeve 2 is rotated in the opposite direction. The second wall sleeve 2 is retracted into the first wall sleeve 1 under the elastic force of the spring inside the first telescopic rod 8, and drives the two sets of limiting sleeves 401 to fit the wall.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective tube for building electrical cable wall penetration, comprising a first wall penetration sleeve (1) and a second wall penetration sleeve (2), characterized in that: A connecting pipe (3) is fixedly installed at one end of the second wall sleeve (2) away from the first wall sleeve (1); a joint protection device (4) is provided between the connecting pipe (3) and the end of the first wall sleeve (1) away from the second wall sleeve (2); a sealing ring (5) and a threaded ring (6) are fixedly installed inside the end of the first wall sleeve (1) close to the second wall sleeve (2); a limiting ring (7) is rotatably installed at one end of the second wall sleeve (2) away from the connecting pipe (3); a first telescopic rod (8) and a second telescopic rod (9) are installed between the limiting ring (7) and the threaded ring (6).

2. A protective tube for building electrical cables passing through walls according to claim 1, characterized in that: The joint protection device (4) comprises a limiting sleeve (401), the limiting sleeve (401) is in the shape of a circular ring, a circular groove (402) is provided on the outer wall of the limiting sleeve (401) on one side close to the first wall sleeve (1), and the limiting sleeve (401) is threadedly connected to the first wall sleeve (1) and the connecting pipe (3) via the groove (402).

3. A protective tube for building electrical cables passing through walls according to claim 2, characterized in that: A connecting ring (403) is arranged inside the limiting sleeve (401), two groups of sleeve rings (404) are rotatably sleeved on the connecting ring (403), two groups of fixing blocks (405) are fixedly installed on the connecting ring (403), and the two groups of fixing blocks (405) and the sleeve rings (404) are staggeredly distributed, and the connecting ring (403) is fixedly connected to the limiting sleeve (401) through the fixing blocks (405).

4. A protective tube for building electrical cables passing through walls according to claim 1, characterized in that: The sealing ring (5) is made of rubber. The outer diameters of the sealing ring (5) and the threaded ring (6) match the inner diameter of the first wall sleeve (1). The inner diameter of the sealing ring (5) matches the outer diameter of the second wall sleeve (2). The second wall sleeve (2) is slidably connected to the sealing ring (5).

5. A protective tube for building electrical cables passing through walls according to claim 1, characterized in that: A thread matching the threaded ring (6) is formed on the outer wall of one end of the second wall sleeve (2) away from the connecting pipe (3), and the second wall sleeve (2) is threadably connected to the threaded ring (6).

6. A protective tube for building electrical cables passing through walls according to claim 1, characterized in that: The outer diameter of the limiting ring (7) is smaller than the inner diameter of the first wall sleeve (1); the first telescopic rod (8) and the second telescopic rod (9) are slidably connected, and a spring which can be compressed by the second telescopic rod (9) is installed inside the first telescopic rod (8); the ends of the first telescopic rod (8) and the second telescopic rod (9) which are away from each other are fixedly connected to the limiting ring (7) and the threaded ring (6), respectively.

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