Cable joint protection device for power cable engineering

Abstract

The utility model discloses a cable joint protection device for power cable engineering, which comprises a shell structure detachably sleeved at a cable joint and a plug structure which is in sliding fit with a cable and is screwed into the shell structure, a sealing stop strip is spirally wound in the shell structure, and the sealing stop strip is screwed into the shell structure. The plug structure extrudes the sealing stop strip after being screwed in, and the sealing stop strip is in interference fit between the shell structure and the cable; the device can perform waterproof protection on the joint position, can reduce cable torsion, and is convenient for pipe penetration.

Description

Technical Field

[0001] The utility model relates to a cable joint protection device used in power cable engineering. Background Art

[0002] As a key device for power and signal transmission, the smooth installation and construction of cables is crucial to ensure the stability and safety of the power system. However, in the process of power transmission, cables are a kind of power or signal transmission device, usually composed of several or several groups of wires, each group of wires is insulated from each other, and are often twisted around a center, and the entire outer surface is covered with a highly insulating covering layer. During the installation and construction of power cables, cable tubes need to be laid in advance to ensure the smooth passage of cables and protect the cables. However, the existing cable tube protection is relatively simple, the protection of cable joints is not comprehensive enough, twisting damage is prone to occur when passing through the tube, and the sealing of the cable tube is more troublesome, which brings more inconvenience to the installation and construction of cables.

[0003] Based on the above problems, we have designed a cable joint protection device for power cable projects that can provide waterproof protection at the joint position, reduce cable torsion, and facilitate pipe threading. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a cable joint protection device for power cable engineering which can provide waterproof protection for the joint position, reduce cable twisting, and facilitate pipe threading.

[0005] The utility model is realized by the following technical solutions:

[0006] A cable joint protection device for power cable engineering, comprising a removable shell structure sleeved on the cable joint, and a plug structure slidably fitted on the cable and screwed into the shell structure, a sealing stop strip is spirally coiled in the shell structure, the sealing stop strip is squeezed after the plug structure is screwed in, and the sealing stop strip is interference fit between the shell structure and the cable.

[0007] Preferably, the shell structure includes an upper and a lower sub-shell, a screw is fixed between the two sub-shells, grooves are arranged on the opposite surfaces of the two sub-shells, both ends of the groove pass through the sub-shells, and when the two sub-shells are combined, a sealing strip is embedded in the groove, and when the two sub-shells are closed under the action of the screws, the sealing strip is squeezed and deformed, and an inner hole is formed after the two sub-shells are combined, and a first inner hole is arranged at both ends of the inner hole, and the diameter of the first inner hole is larger than the diameter of the inner hole, the sealing stop strip is spirally coiled in the inner hole, and both ends extend into the first inner hole, and an internal thread is processed at the orifice of the first inner hole, and the plug structure is matched through the internal thread.

[0008] Preferably, the plug structure includes a plug, one end of the plug is processed to form a tapered end, and the other end of the plug is provided with a threaded connection portion, the threaded connection portion is screwed into the internal thread, and the end of the threaded connection portion is provided with two or more metal rings, and a sealing ring is provided between two adjacent metal rings, the metal ring is transitionally matched with the first inner hole, and the sealing ring is transitionally matched with the first inner hole, the inner diameter of the metal ring is larger than the outer diameter of the cable, and the inner diameter of the sealing ring is equal to the outer diameter of the cable, when the threaded connection portion is screwed into the extreme position along the internal thread, the sealing ring is squeezed and deformed by the metal, and a seal is formed between the outer wall of the sealing ring and the first inner hole, and a seal is formed between the inner wall of the sealing ring and the cable, and the metal ring located at the inner end squeezes the sealing stop strip.

[0009] Preferably, a through stepped hole is provided in the plug, the end of the stepped hole close to the sub-shell is the large end, and the end away from the sub-shell is the small end, a first sealing ring is embedded in the small end of the stepped hole, a seal is formed between the first sealing ring and the cable, a second sealing ring is clamped in the large end of the stepped hole, and one or more water stop rings are provided on the inner wall of the second sealing ring, a seal is formed between the water stop ring and the cable.

[0010] Preferably, a sealing gasket is provided at the end of the plug facing the sub-shell, and when the threaded connection portion is screwed in to the limit position along the internal thread, the sealing gasket is squeezed and sealed between the sub-shell and the plug.

[0011] The beneficial effects of the utility model are:

[0012] Advantage 1: In this technical solution, the shell structure and the plug structure are used in combination. The plug structure is already installed on the cable when the two cables are butt-jointed, and the shell structure is installed after the cables are jointed. The sealing at the joint position is completed by the cooperation of the shell structure and the plug structure, the sealing effect is better, and the protection of the joint is better.

[0013] Advantage 2: By screwing in the plug structure and cooperating with the shell structure, the cable can be clamped, which increases the stability of the cable when it is passed through the pipe, reduces torsion, and reduces the disconnection of the connector caused by torsion.

[0014] Advantage three: the plug structure is adopted to facilitate pipe threading.

[0015] Advantage four: The spirally wound sealing stop strip can compress and seal the joint, reduce the chance of the joint loosening, and increase the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural exploded diagram of the utility model;

[0019] Figure 3 It is a half-section view of the plug structure;

[0020] Figure 4 This is the enlarged view of point A;

[0021] Figure 5 This is an enlarged view of point B;

[0022] Figure 6 is a schematic diagram of the structure of a metal ring;

[0023] Figure 7 is a schematic diagram of the structure of the sealing ring;

[0024] Figure 8 This is a schematic diagram of the cable connector. DETAILED DESCRIPTION

[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0026] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0027] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "set", "socket", "connect", "penetrate", "plug in" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; 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.

[0030] like Figure 1 and Figure 8 A cable joint protection device for a power cable project shown in the figure includes a shell structure 2 that is detachably sleeved on a cable joint 1, and a plug structure 4 that is slidably fitted on a cable 3 and screwed into the shell structure 2, a sealing stop strip 5 is spirally wound in the shell structure 2, and the sealing stop strip 5 is squeezed after the plug structure 4 is screwed in, and the sealing stop strip 5 is interference fit between the shell structure 2 and the cable 3.

[0031] In the above technical solution, the sealing stop strip 5 is compressed to form an extrusion fixation and seal at the joint 1 of the cable 3 to resist the torsional force, and at the same time plays a sealing role to prevent water from entering the joint 1.

[0032] See also Figure 1 and Figure 2 As shown, the shell structure 2 includes an upper and a lower sub-shell 201, a screw 202 is fixed between the two sub-shells 201, and grooves 203 are arranged on the opposite surfaces of the two sub-shells 201, and both ends of the groove 203 penetrate the sub-shells 201. When the two sub-shells 201 are combined, a sealing strip 204 is embedded in the groove 203. When the two sub-shells 201 are closed under the action of the screws 202, the sealing strip 204 is squeezed and deformed, and the two sub-shells 201 are combined to form an inner hole 205, and first inner holes 206 are arranged at both ends of the inner hole 205. The diameter of the first inner hole 206 is larger than the diameter of the inner hole 205. The sealing stop strip 5 is spirally coiled in the inner hole 205, and both ends extend into the first inner hole 206. The opening of the first inner hole 206 is processed with an internal thread 207, and the plug structure 4 is matched through the internal thread 207.

[0033] In the above technical solution, the upper and lower detachable sub-shells 201 are used to achieve closure. When the joint 1 needs to be repaired at a later stage, the sub-shells 201 can be opened to facilitate the repair work.

[0034] The upper and lower sub-shells 201 are sealed by a sealing strip 204 . After being tightened, the plug structure 4 cooperates with the sealing strip 204 at both ends of the sub-shell 201 to form a seal, further improving the sealing effect.

[0035] See also Figures 2 to 7 As shown, the plug structure 4 includes a plug 401, one end of the plug 401 is processed to form a tapered end 402, the other end of the plug 401 is provided with a threaded connection portion 403, the threaded connection portion 403 is screwed into the internal thread 207, the end of the threaded connection portion 403 is provided with more than two metal rings 404, a sealing ring 405 is provided between two adjacent metal rings 404, the metal ring 404 is transitionally matched with the first inner hole 206, and the sealing ring 405 is connected to the first inner hole 207. 6 transition fit, the inner diameter of the metal ring 404 is larger than the outer diameter of the cable 3, the inner diameter of the sealing ring 405 is equal to the outer diameter of the cable 3, when the threaded connection part 403 is screwed into the limit position along the internal thread 207, the sealing ring 405 is squeezed and deformed by the metal ring 404, at this time, a seal is formed between the outer wall of the sealing ring 405 and the first inner hole 206, and a seal is formed between the inner wall of the sealing ring 405 and the cable 3, and the metal ring 404 at the inner end squeezes the sealing stop strip 5.

[0036] In the above technical solution, by screwing in the threaded connection part 403, the metal ring 404 squeezes the sealing ring 405, so that the thickness of the sealing ring 405 is compressed, while the inner diameter and the outer diameter are increased, so that a reliable seal is formed between the sealing ring 405 and the cable 3, and between the sealing ring 405 and the sub-housing 201.

[0037] During later maintenance, the sub-shell 201 can be disassembled by unscrewing the threaded connection portion 403 .

[0038] See also Figure 3 , Figure 4 and Figure 5 As shown, a through stepped hole 441 is provided in the plug 401, the end of the stepped hole 441 close to the sub-shell 201 is the large end, and the end away from the sub-shell 201 is the small end, a first sealing ring 442 is embedded in the small end of the stepped hole 441, a seal is formed between the first sealing ring 442 and the cable 3, a second sealing ring 443 is clamped in the large end of the stepped hole 441, and more than one water stop ring 444 is provided on the inner wall of the second sealing ring 443, a seal is formed between the water stop ring 444 and the cable 3.

[0039] In the above technical solution, a sealing effect can be achieved at the position of the plug 401 to further reduce the entry of water.

[0040] See also Figure 3 , Figure 4 and Figure 5 As shown, a sealing gasket 445 is provided at the end of the plug 401 facing the sub-housing 201 , and when the threaded connection portion 403 is screwed in to the limit position along the internal thread 207 , the sealing gasket 445 is squeezed and sealed between the sub-housing 201 and the plug 401 .

[0041] After the plug 401 is tightened, the sealing gasket 445 can play a sealing role at the gap position.

[0042] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A cable joint protection device for power cable engineering, characterized in that: The invention comprises a shell structure (2) which is detachably sleeved on a cable joint (1), and a plug structure (4) which is slidably fitted on a cable (3) and screwed into the shell structure (2), wherein a sealing stop strip (5) is spirally wound in the shell structure (2), and the plug structure (4) squeezes the sealing stop strip (5) after being screwed in, and the sealing stop strip (5) is interference-fitted between the shell structure (2) and the cable (3).

2. The cable joint protection device for power cable engineering according to claim 1 is characterized in that: The housing structure (2) comprises an upper and a lower sub-shell (201), a screw (202) being fixed between the two sub-shells (201), grooves (203) being arranged on opposite surfaces of the two sub-shells (201), both ends of the groove (203) passing through the sub-shells (201), and a sealing strip (204) being embedded in the groove (203) when the two sub-shells (201) are combined, and when the two sub-shells (201) are closed under the action of the screw (202), the sealing strip (204) ) is squeezed and deformed, and the two sub-shells (201) are combined to form an inner hole (205), and first inner holes (206) are arranged at both ends of the inner hole (205), and the diameter of the first inner hole (206) is larger than the diameter of the inner hole (205), and the sealing stop strip (5) is spirally coiled in the inner hole (205), and both ends extend into the first inner hole (206), and the opening of the first inner hole (206) is processed with an internal thread (207), and the plug structure (4) is matched through the internal thread (207).

3. The cable joint protection device for power cable engineering according to claim 2 is characterized in that: The plug structure (4) comprises a plug (401), one end of the plug (401) is processed to form a tapered end (402), the other end of the plug (401) is provided with a threaded connection portion (403), the threaded connection portion (403) is screwed into the internal thread (207), the end of the threaded connection portion (403) is provided with two or more metal rings (404), a sealing ring (405) is provided between two adjacent metal rings (404), the metal ring (404) and the first inner hole (206) are transitionally matched, and the sealing ring (405) and the first inner hole (206) are connected to each other. ) transition fit, the inner diameter of the metal ring (404) is larger than the outer diameter of the cable (3), the inner diameter of the sealing ring (405) is equal to the outer diameter of the cable (3), when the threaded connection part (403) is screwed into the limit position along the internal thread (207), the sealing ring (405) is squeezed and deformed by the metal ring (404), at this time, a seal is formed between the outer wall of the sealing ring (405) and the first inner hole (206), and a seal is formed between the inner wall of the sealing ring (405) and the cable (3), and the metal ring (404) located at the inner end squeezes the sealing stop strip (5).

4. The cable joint protection device for power cable engineering according to claim 3 is characterized in that: A through stepped hole (441) is provided in the plug (401); the end of the stepped hole (441) close to the sub-shell (201) is a large end, and the end away from the sub-shell (201) is a small end; a first sealing ring (442) is embedded in the small end of the stepped hole (441); a seal is formed between the first sealing ring (442) and the cable (3); a second sealing ring (443) is clamped in the large end of the stepped hole (441); one or more water stop rings (444) are provided on the inner wall of the second sealing ring (443); a seal is formed between the water stop ring (444) and the cable (3).

5. The cable joint protection device for power cable engineering according to claim 4 is characterized in that: A sealing gasket (445) is provided at the end of the plug (401) facing the sub-shell (201); when the threaded connection portion (403) is screwed in along the internal thread (207) to the limit position, the sealing gasket (445) is squeezed and sealed between the sub-shell (201) and the plug (401).

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