Flexible plugging device for power protection tube

By using a sealing head design with a spring and a protrusion, and a fireproof mud mesh, the problem of easy cracking and falling off of traditional cable protection pipe sealing is solved, thus improving sealing and fire resistance, preventing moisture from entering and quickly melting to block the fault in case of failure.

CN222321002UActive Publication Date: 2025-01-07ANHUI MINGMU ELECTRIC POWER TECH CO LTD
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Patent Information

Application Number
CN202323525204.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-22
Publication Date
2025-01-07
Estimated Expiration
2033-12-22

AI Technical Summary

Technical Problem

Traditional cable protection pipe sealing methods are prone to cracking and falling off, causing water to seep into the conduit and freeze, resulting in cable failure.

Method used

The sealing head design, which combines a spring and a protrusion, along with a fireproof putty mesh, ensures a tight seal between the sealing head and the connecting sleeve. When the fireproof putty falls out of the mesh, it allows air to pass through and melts, preventing moisture from entering.

Benefits of technology

It improves the sealing and fire resistance of the sealing device, prevents moisture from entering, reduces the risk of cable failure, and can quickly melt and block the fault in the event of a failure.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model relates to the technical field of power protection tube flexible plugging devices, and discloses a power protection tube flexible plugging device which comprises a power protection tube, a connecting sleeve is fixedly connected to the front end of the outer wall of the power protection tube, a sealing groove is formed in the outer surface of the connecting sleeve, and a sealing gasket is arranged on the side, close to the connecting sleeve, of a plugging head. A first notch is formed in the side, close to the plugging head, of the connecting sleeve, and a second notch is formed in the rear end of the first notch. According to the flexible plugging device for the electric power protection pipe, fireproof mud is put in from a mud inlet formed in the upper surface of a fireproof mud separation net, the fireproof mud separation net can be attached to the outer wall of a cable, and therefore the fireproof mud in the fireproof mud separation net is made to be close to the cable all the time; through the arrangement of the sealing gasket, the convex block at the lower end of the plugging head can be smoothly clamped into the first notch, the inclined plate can abut against the convex block through the spring, falling is not likely to happen, water cannot enter the sealing gasket and the sealing groove, and practicability is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of flexible plugging devices for electric power protection tubes, in particular to a flexible plugging device for electric power protection tubes. Background Art

[0002] At present, there are two carriers for power transmission, overhead line transmission and cable transmission. Overhead lines require the construction of aerial corridors for transmission, while cables are buried underground or transported through underground pipelines. When the cable comes out of the ground, the cable terminal tower leads the cable out of the ground and connects it to overhead lines, or substations and other equipment. When the cable comes out of the ground, a cable protection tube is installed to protect the cable, and fireproof materials should be set at the opening of the cable protection tube for sealing. Traditional cable protection tube fireproof sealing mainly uses cement or fireproof putty to seal the pipe opening. Although this method can provide short-term protection, the fireproof putty will fall off, crack, and collapse over time. Especially in winter, rainwater will seep into the casing and freeze, which will eventually cause cable failure in the casing. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a flexible sealing device for an electric power protection tube, which prevents water from entering the interior through the cooperation of a spring and a protrusion. At the same time, a fireproof mud net is provided so that the fireproof mud fits the cable line. Even if the fireproof mud cracks, it will fall into the fireproof mud net, thus solving the above-mentioned technical problems.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible sealing device for an electric power protection tube, comprising an electric power protection tube, a connecting sleeve is fixedly connected to the front end of the outer wall of the electric power protection tube, a sealing groove is provided on the outer surface of the connecting sleeve, an electric cable is arranged inside the electric power protection tube, a sealing head is arranged at the front end of the connecting sleeve, a fireproof mud partition net is fixedly connected to the sealing head on the side close to the connecting sleeve, and a sealing gasket is arranged on the side close to the connecting sleeve, a first notch is provided on the side close to the sealing head, and a second notch is provided at the rear end of the first notch.

[0007] Preferably, the sealing groove cooperates with a sealing gasket.

[0008] Through the above technical solution, the sealing gasket is arranged on the side of the sealing head close to the connecting sleeve, and the sealing groove is opened on the outer surface of the side of the connecting sleeve close to the sealing head. That is, when the sealing head is combined with the connecting sleeve, the sealing gasket and the sealing groove fit each other, and the sealing gasket is embedded in the sealing groove, so that the connection between the sealing head and the connecting sleeve achieves a sealing effect, avoiding the occurrence of water ingress.

[0009] Preferably, a spring is provided inside the second notch, and a slant plate is fixedly connected to the front end of the spring.

[0010] Through the above technical solution, the second slot is opened at the rear end of the first slot, and a spring and an inclined plate connected to the front end of the spring are arranged in the second slot. When the inclined plate is subjected to force, the spring is driven to contract, so that the spring is compressed into the second slot, thereby providing sufficient space inside the first slot.

[0011] Preferably, the plugging head is fixedly connected with a protrusion on a side close to the connecting sleeve, and the protrusion cooperates with the first notch.

[0012] Through the above technical solution, when the sealing head is connected to the connecting sleeve, the sealing head is pressed downward so that the protrusion at the lower end of the sealing head can be smoothly inserted into the first slot, and when the inclined surface at the rear end of the protrusion encounters the inclined plate, it can continue to be fed downward along the inclined plate, so that the inclined plate is subjected to force, and the inclined plate pushes toward one side of the spring, so that the spring is compressed into the second slot, and then the sealing head is slightly rotated to make the protrusion move toward the front end of the first slot, thereby smoothly entering the front end of the first slot. At the same time, the spring at the rear end enables the inclined plate to resist the protrusion forward, so that it is not easy to fall off, and the set sealing gasket can also cooperate with the sealing groove to make the connection difficult to enter water, thereby improving practicality.

[0013] Preferably, ventilation holes are provided through the outer surface of the fireproof mud partition.

[0014] Through the above technical solution, the air holes opened on the outer surface of the fireproof mud partition net can allow the internal fireproof mud to ventilate, so that the fireproof mud and the external air can convect, thereby preventing the fireproof mud from generating high temperature.

[0015] Preferably, a mud inlet is provided at the upper end of the outer surface of the fireproof mud partition.

[0016] Through the above technical scheme, the fireproof mud is put into the mud inlet opened on the upper surface of the fireproof mud partition net, and then the sealing head is fitted with the connecting sleeve. The fireproof mud partition net will fit with the outer wall of the cable line, so that the fireproof mud inside the fireproof mud partition net is always close to the cable line, and even when it falls off, it will be inside the fireproof mud partition net. The air holes opened on the outer surface of the fireproof mud partition net allow the fireproof mud to convect with the internal space of the power protection tube, making it less likely to have high temperature.

[0017] Compared with the prior art, the utility model provides a flexible plugging device for an electric power protection tube, which has the following beneficial effects:

[0018] 1. The utility model provides components such as springs and protrusions. When the plugging head is connected to the connecting sleeve, the plugging head is pressed downward so that the protrusion at the lower end of the plugging head can be smoothly inserted into the first notch. When the inclined surface at the rear end of the protrusion meets the inclined plate, it can continue to be fed downward along the inclined plate, so that the inclined plate is subjected to force, and the inclined plate pushes one side of the spring, so that the spring is compressed into the second notch. Then, the plugging head is slightly rotated to make the protrusion move toward the front end of the first notch, so that it can smoothly enter the front end of the first notch. At the same time, the spring at the rear end enables the inclined plate to resist the protrusion forward, so that it is not easy to fall off. The provided sealing gasket can also cooperate with the sealing groove to make it difficult for water to enter the connection, thereby improving practicality.

[0019] 2. The utility model provides a fireproof mud screen and a mud inlet, and the fireproof mud is put into the mud inlet opened on the upper surface of the fireproof mud screen, and then the sealing head is fitted with the connecting sleeve, and the fireproof mud screen will fit with the outer wall of the cable line, so that the fireproof mud inside the fireproof mud screen is always close to the cable line, and it will be inside the fireproof mud screen even when it falls off, and the air holes opened on the outer surface of the fireproof mud screen allow the fireproof mud to convect with the internal space of the power protection tube, so that the fireproof mud is not prone to high temperature. At the same time, the fireproof mud screen material is a low melting point material. When encountering a cable fault, it can melt quickly, so that the fireproof mud falls to the outer surface of the cable line, thereby blocking the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a cross-sectional schematic diagram of the structural protrusion and other components of the utility model;

[0022] Figure 3 It is a cross-sectional schematic diagram of the structural cable and other components of the utility model;

[0023] Figure 4 The utility model structure Figure 2 A is a partial enlarged schematic diagram;

[0024] Figure 5 The utility model structure Figure 3 A partial enlarged schematic diagram of B in the figure.

[0025] Among them: 1. power protection tube; 2. connecting sleeve; 3. sealing groove; 4. cable; 5. plugging head; 6. fireproof mud partition net; 7. sealing gasket; 8. first notch; 9. second notch; 91. spring; 92. inclined plate; 93. protrusion; 61. air vent; 62. mud inlet. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-5 A flexible sealing device for an electric power protection tube comprises an electric power protection tube 1, a connecting sleeve 2 is fixedly connected to the front end of the outer wall of the electric power protection tube 1, a sealing groove 3 is provided on the outer surface of the connecting sleeve 2, a cable 4 is arranged inside the electric power protection tube 1, a sealing head 5 is arranged at the front end of the connecting sleeve 2, the sealing head 5 is fixedly connected to a fireproof mud partition net 6 on the side close to the connecting sleeve 2, and a sealing gasket 7 is provided on the side close to the connecting sleeve 2, the connecting sleeve 2 is provided with a first notch 8 on the side close to the plugging head 5, and a second notch 9 is provided at the rear end of the first notch 8.

[0028] Specifically, the sealing groove 3 cooperates with the sealing gasket 7. The advantage is that the sealing gasket 7 is arranged on the side of the plugging head 5 close to the connecting sleeve 2, and the sealing groove 3 is opened on the outer surface of the connecting sleeve 2 close to the plugging head 5, that is, when the plugging head 5 is combined with the connecting sleeve 2, the sealing gasket 7 and the sealing groove 3 are fitted to each other, and the sealing gasket 7 is embedded in the sealing groove 3, so that the connection between the plugging head 5 and the connecting sleeve 2 achieves a sealing effect, avoiding the occurrence of water ingress.

[0029] Specifically, a spring 91 is disposed inside the second slot 9, and a slanted plate 92 is fixedly connected to the front end of the spring 91. The advantage is that the second slot 9 is opened at the rear end of the first slot 8, and the spring 91 is disposed inside the second slot 9 and the slanted plate 92 connected to the front end of the spring 91, when the slanted plate 92 is subjected to force, the spring 91 is driven to contract, so that the spring 91 is compressed into the second slot 9, thereby providing enough space inside the first slot 8.

[0030] Specifically, the plugging head 5 is fixedly connected with a protrusion 93 on one side close to the connecting sleeve 2, and the protrusion 93 cooperates with the first notch 8. The advantage is that when the plugging head 5 is connected with the connecting sleeve 2, by pressing the plugging head 5 downward, the protrusion 93 at the lower end of the plugging head 5 is smoothly inserted into the first notch 8, and when the inclined surface at the rear end of the protrusion 93 encounters the inclined plate 92, it can continue to be fed downward along the inclined plate 92, so that the inclined plate 92 is subjected to force, and the inclined plate 92 pushes the spring 91 to compress the spring 91 into the second notch 9, and then the plugging head 5 is slightly rotated to make the protrusion 93 move to the front end of the first notch 8, so as to smoothly enter the front end of the first notch 8, and at the same time, the spring 91 at the rear end enables the inclined plate 92 to resist the protrusion 93 forward, so that it is not easy to fall off, and the provided sealing gasket 7 can also cooperate with the sealing groove 3 to make it difficult for water to enter the connection, thereby improving practicality.

[0031] Specifically, the outer surface of the fireproof mud partition 6 is penetrated with air holes 61. The advantage is that the air holes 61 opened on the outer surface of the fireproof mud partition 6 can allow the internal fireproof mud to ventilate, so that the fireproof mud and the outside air convect, thereby preventing the fireproof mud from generating high temperature.

[0032] Specifically, a mud inlet 62 is provided at the upper end of the outer surface of the fireproof mud partition 6. The advantage is that the fireproof mud is put in from the mud inlet 62 provided on the upper surface of the fireproof mud partition 6, and then the plugging head 5 is fitted with the connecting sleeve 2, and the fireproof mud partition 6 is fitted with the outer wall of the cable 4, so that the fireproof mud inside the fireproof mud partition 6 is always close to the cable 4, and even when it falls off, it will be inside the fireproof mud partition 6, and the air holes 61 provided on the outer surface of the fireproof mud partition 6 allow the fireproof mud to convect with the internal space of the power protection tube 1, so that high temperature is not easy to occur. At the same time, the material of the fireproof mud partition 6 is a low melting point material, and when encountering a fault in the cable 4, it can melt quickly, so that the fireproof mud falls to the outer surface of the cable 4, thereby cutting off the fault.

[0033] When in use, the fireproof mud is put into the mud inlet 62 opened on the upper surface of the fireproof mud partition net 6, and then the plugging head 5 is fitted with the connecting sleeve 2, and the fireproof mud partition net 6 will fit with the outer wall of the cable 4, so that the fireproof mud inside the fireproof mud partition net 6 is always close to the cable 4, even when the fireproof mud is cracked, it will be inside the fireproof mud partition net 6. When the fireproof mud is connected to the connecting sleeve 2 through the plugging head 5, the plugging head 5 is pressed downward so that the protrusion 93 at the lower end of the plugging head 5 can be smoothly inserted into the first notch 8. When the inclined surface of the rear end of the protrusion 93 is When encountering the inclined plate 92, it can continue to feed downward along the inclined plate 92, so that the inclined plate 92 is subjected to force, and the inclined plate 92 pushes to the side of the spring 91, so that the spring 91 is compressed into the second slot 9, and then by slightly rotating the plugging head 5, the protrusion 93 moves to the front end of the first slot 8, so that it can smoothly enter the front end of the first slot 8. At the same time, the spring 91 at the rear end enables the inclined plate 92 to resist the protrusion 93 forward, making it difficult to fall off. The set sealing gasket 7 can also cooperate with the sealing groove 3 to make the connection difficult to get water, thereby improving practicality.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible plugging device for an electric power protection tube, comprising an electric power protection tube (1), characterized in that: A connecting sleeve (2) is fixedly connected to the front end of the outer wall of the power protection tube (1), a sealing groove (3) is provided on the outer surface of the connecting sleeve (2), a cable (4) is arranged inside the power protection tube (1), a plugging head (5) is arranged at the front end of the connecting sleeve (2), a fireproof mud screen (6) is fixedly connected to the plugging head (5) on the side close to the connecting sleeve (2), and a sealing gasket (7) is arranged on the side close to the connecting sleeve (2), a first notch (8) is provided on the side close to the plugging head (5), and a second notch (9) is provided at the rear end of the first notch (8).

2. A flexible plugging device for an electric power protection tube according to claim 1, characterized in that: The sealing groove (3) matches the sealing gasket (7).

3. The flexible plugging device for an electric power protection tube according to claim 1, characterized in that: A spring (91) is disposed inside the second notch (9), and a slanted plate (92) is fixedly connected to the front end of the spring (91).

4. The flexible plugging device for an electric power protection tube according to claim 1, characterized in that: The plugging head (5) is fixedly connected with a protrusion (93) on a side close to the connecting sleeve (2), and the protrusion (93) cooperates with the first notch (8).

5. The flexible plugging device for an electric power protection tube according to claim 1, characterized in that: The outer surface of the fireproof mud isolation net (6) is provided with ventilation holes (61) extending therethrough.

6. The flexible plugging device for an electric power protection tube according to claim 1, characterized in that: A mud inlet (62) is provided at the upper end of the outer surface of the fireproof mud partition (6).