Protective steel pipe plugging joint for laying long-distance secondary cable

Abstract

The invention discloses a protection steel pipe plugging joint for long-distance secondary cable laying, and relates to the technical field of cable laying, the protection steel pipe plugging joint comprises a body, the body comprises a sleeve, one end of the sleeve is provided with a corrugated pipe, one end of the corrugated pipe is connected with an interface, the other end of the sleeve is provided with a steel pipe, and the inner side of the interface is provided with a cable hole. The matching gap of the steel pipe and the sleeve is sealed through the sealing piece, the sealing piece is covered and abutted by the protective cover, direct sunlight and rainwater contact are prevented, the aging speed of the sealing piece is delayed, the sealing piece is prevented from falling off, and the fastening bolt can further guarantee the stability of the steel pipe and the sleeve; the clamping piece is used for keeping stable after the end of the steel pipe extends into the sleeve, the sealing piece is used for wrapping the sleeve and the steel pipe at the same time, the matching position of the sleeve and the steel pipe is kept sealed, and the limiting ring is arranged at the fixing ring and abuts against the interior of the limiting ring.

Description

Technical Field

[0001] The invention relates to the technical field of cable laying, in particular to a protective steel pipe plugging joint for long-distance secondary cable laying. Background Art

[0002] At present, the control cables used in substations of various voltage levels need to be connected to the arrester online monitoring device after being led out from the port of the protective steel pipe, and the part of the cable led out from the end of the steel pipe needs to be sealed with a joint.

[0003] In the prior art, such as the patent publication number: CN221057998U "A joint for sealing a control cable protective steel pipe", includes a sleeve and a bellows, the upper end of the sleeve is closed and the lower end is open, the open end of the sleeve is used to be sleeved on the port of the protective steel pipe of the control cable, the closed end of the sleeve is fixedly connected to an extension pipe communicated with the interior of the sleeve, one end of the bellows is fixedly connected to the top of the extension pipe, and the other end of the bellows is used to be fixedly connected to the bottom of the online monitoring device of the lightning arrester.

[0004] However, there are many specifications of cable protection steel pipes, and different specifications have different diameters. However, the size of one end of the sleeve of the above-mentioned joint is fixed, and only bolts are set at the sleeve to tighten the steel pipe. Not only can it not adapt to steel pipes of different diameters, but also the sealing is not enough. Moisture in the air can easily enter the sleeve and steel pipe, thereby affecting the safety of the cable. In view of the above problems, a protective steel pipe sealing joint for long-distance secondary cable laying is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a protective steel pipe sealing joint for long-distance secondary cable laying, so as to solve the problem that the prior art proposed in the above background technology cannot adapt to steel pipes of different diameters during operation, and the sealing is not enough, and moisture in the air can easily enter the casing and steel pipe, thereby affecting the safety of the cable.

[0006] To achieve the above object, the present invention provides the following technical solution: a protective steel pipe plugging joint for long-distance secondary cable laying, comprising a body, the body comprising a sleeve, one end of the sleeve is provided with a corrugated pipe, one end of the corrugated pipe is connected to an interface, the other end of the sleeve is provided with a steel pipe, and the inner side of the interface is provided with a cable hole; A clamping piece is arranged between the sleeve and the steel pipe, and a sealing piece is arranged on the outer side of the sleeve. The cable in the steel pipe passes through the sealing piece into the sleeve, and then passes through the interface of the sleeve from the cable hole, and then the corrugated tube is connected to the interface of the sleeve. After the cable is connected to the corresponding equipment, the corrugated tube is connected to the interface of the equipment; then the sealing ring of the sealing piece is aligned with the end of the steel pipe and sleeved, and the steel pipe is inserted into the sealing piece and the sleeve at this time. When the steel pipe is inserted into the sleeve, it will first contact with the guide surface of the clamping block, so that the clamping block automatically retracts and clamps the steel pipe, so that the steel pipe remains stable for later use. Continue to rotate the fastening bolts; after the end of the steel pipe is tightly against one end of the sleeve, rotate the fastening bolts to press against the side wall of the steel pipe, and the installation is completed at this time; the seal has sealed the matching gap between the steel pipe and the sleeve, and the protective cover has covered and tightened the seal to prevent direct sunlight and rain contact to delay the aging speed of the seal and prevent the seal from falling off. The fastening bolts can further ensure the stability of the steel pipe and the sleeve, the clamp is used to maintain stability after the end of the steel pipe is inserted into the sleeve, and the seal is used to wrap the sleeve and the steel pipe at the same time to keep the matching between the sleeve and the steel pipe sealed.

[0007] Preferably, a fixing ring is provided at one end of the sleeve, a through-hole is formed on the side of the fixing ring, the through-hole passes through the side wall of the sleeve, a sliding groove is provided on the side of the through-hole, the sliding groove passes through the side walls of the fixing ring and the sleeve, a limiting ring is provided on the top of the fixing ring, a sliding block is movably connected to the inner side of the sliding groove, a clamping block is provided on the side of the sliding block, and the clamping block movably passes through the through-hole and the inner side of the sleeve.

[0008] Preferably, a fixing ring is provided at one end of the sleeve, a through-hole is formed on the side of the fixing ring, the through-hole passes through the side wall of the sleeve, a sliding groove is provided on the side of the through-hole, the sliding groove passes through the side walls of the fixing ring and the sleeve, a limiting ring is provided on the top of the fixing ring, a limiting ring is provided at the fixing ring, the limiting ring is tightly pressed against the inside of the limiting ring, an elastic connecting part is wrapped around the outside of the limiting ring and the fixing ring, a sealing ring is wrapped around the steel pipe, and at this time, the gap at the opening where the sleeve and the steel pipe cooperate has been blocked by the seal, so that moisture in the air cannot enter.

[0009] Preferably, a slider is movably connected to the inner side of the slide groove, and a clamping block is provided on the side of the slider. The clamping block movably passes through the through-opening and the inner side of the sleeve. After the steel pipe is inserted into the sleeve, it will contact the guide surface of the clamping block, so that the clamping block automatically retracts and clamps the steel pipe, so that the steel pipe remains stable and is convenient for the subsequent rotation of the tightening bolts.

[0010] Preferably, a mounting plate is connected to the outer side of the fixing ring, the mounting plate is movably connected to the inner side of the sliding groove, and a spring is connected between the mounting plate and the sliding block.

[0011] Preferably, the lower section of the clamping block is provided with a guide surface.

[0012] Preferably, the sealing member comprises a limiting ring, a connecting portion and a sealing ring made of elastic rubber material. The sealing ring of the sealing member is aligned with the end of the steel pipe and sleeved so that the steel pipe extends into the sealing member and the sleeve.

[0013] Preferably, a protective mechanism is provided on the outer side of the seal, and the protective mechanism includes a protective cover with a convex cross-section, and a sealing ring is embedded on the inner side of the protective cover and pressed against the outer wall of the sleeve, and the sealing ring is used to prevent rainwater from penetrating from the threaded fitting and contacting the seal.

[0014] Preferably, a threaded barrel is provided on the outer side of the protective cover, and the threaded barrel is threaded with a fastening bolt that extends into the interior of the protective cover. The fastening bolt is used to tighten against the side wall of the steel pipe to further ensure the stability between the steel pipe and the sleeve.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the matching gap between the steel pipe and the sleeve is sealed by the seal, and the protective cover has covered and pressed the seal to prevent direct sunlight and rain contact to delay the aging speed of the seal and prevent the seal from falling off. Tightening the bolts can further ensure the stability of the steel pipe and the sleeve.

[0016] 2. In the present invention, the clamping member is used to keep the end of the steel pipe stable after it extends into the sleeve, and the sealing member is used to wrap the sleeve and the steel pipe at the same time, so that the fitting part of the sleeve and the steel pipe remains sealed.

[0017] 3. In the present invention, a limiting ring is provided at the fixing ring, the limiting ring is pressed against the inside of the limiting ring, the elastic connecting part is wrapped around the outside of the limiting ring and the fixing ring, and the sealing ring is wrapped around the steel pipe. At this time, the gap at the opening where the casing and the steel pipe cooperate has been blocked by the sealing member, so that moisture in the air cannot enter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a protective steel pipe plugging joint for long-distance secondary cable laying according to the present invention; Figure 2 It is a schematic diagram of the exploded structure of the protective steel pipe plugging joint for long-distance secondary cable laying of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the protective steel pipe plugging joint for long-distance secondary cable laying of the present invention from another angle; Figure 4 It is a schematic diagram of the internal cross-sectional structure of the protective steel pipe plugging joint for long-distance secondary cable laying of the present invention; Figure 5 For the present invention Figure 4 A is an enlarged structural diagram; Figure 6 This is a schematic diagram of the sleeve structure of the protective steel pipe plugging joint for long-distance secondary cable laying of the present invention; Figure 7 It is a schematic structural diagram of another angle of the sleeve of the protective steel pipe plugging joint for long-distance secondary cable laying of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in FIG. Fig. 9 The present invention is a schematic diagram of the sealing structure of a protective steel pipe plugging joint for long-distance secondary cable laying.

[0019] In the figure: 100, body; 110, sleeve; 120, bellows; 130, steel pipe; 140, protective mechanism; 250, seal; 260, clamp; 341, protective cover; 342, fastening bolt; 343, threaded barrel; 411, interface; 412, cable hole; 544, sealing ring; 561, clamping block; 5610, guide surface; 562, spring; 563, slider; 564, mounting plate; 613, fixing ring; 8130, slide groove; 8131, through-hole; 8132, limit ring; 951, limit ring; 952, connecting part; 953, sealing ring. DETAILED DESCRIPTION

[0020] 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 implementation regulations described 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.

[0021] Example 1: Figure 1-Figure 9 As shown, the present invention provides a technical solution: a protective steel pipe plugging joint for long-distance secondary cable laying, comprising a body 100, the body 100 comprising a sleeve 110, one end of the sleeve 110 is provided with a corrugated tube 120, one end of the corrugated tube 120 is connected with an interface 411, the other end of the sleeve 110 is provided with a steel pipe 130, and the inner side of the interface 411 is provided with a cable hole 412; A clamping member 260 is disposed between the sleeve 110 and the steel pipe 130 , and a sealing member 250 is disposed on the outer side of the sleeve 110 .

[0022] In this embodiment, the cable in the steel pipe 130 passes through the seal 250 into the sleeve 110, and then passes through the interface 411 of the sleeve 110 from the cable hole 412, and then the corrugated tube 120 is connected to the interface 411 of the sleeve 110. After the cable is connected to the corresponding device, the corrugated tube 120 is connected to the interface 411 of the device; then the sealing ring 953 of the seal 250 is aligned with the end of the steel pipe 130 and sleeved, and the steel pipe 130 is inserted into the seal 250 and the sleeve 110. When the steel pipe 130 is inserted into the sleeve 110, it will first contact the guide surface 5610 of the clamping block 561, so that the clamping block 561 automatically retracts and clamps the steel pipe 130, so that the steel pipe 130 remains stable and is convenient for the subsequent rotation of the fastening bolt 34 2. After the end of the steel pipe 130 is tightly pressed against one end of the sleeve 110, turn the fastening bolt 342 to press against the side wall of the steel pipe 130, and the installation is completed at this time; the seal 250 has sealed the matching gap between the steel pipe 130 and the sleeve 110, and the protective cover 341 has covered and pressed the seal 250 to prevent direct sunlight and rain contact to delay the aging speed of the seal 250 and prevent the seal 250 from falling off. The fastening bolt 342 can further ensure the stability of the steel pipe 130 and the sleeve 110. The clamp 260 is used to maintain stability after the end of the steel pipe 130 is inserted into the sleeve 110. The seal 250 is used to wrap the sleeve 110 and the steel pipe 130 at the same time, so that the matching part of the sleeve 110 and the steel pipe 130 remains sealed.

[0023] Example 2: Figure 1-Figure 9 As shown, a fixing ring 613 is provided at one end of the sleeve 110, a through-hole 8131 is provided on the side of the fixing ring 613, the through-hole 8131 penetrates the side wall of the sleeve 110, a slide groove 8130 is provided on the side of the through-hole 8131, the slide groove 8130 penetrates the side wall of the fixing ring 613 and the sleeve 110, a limiting ring 8132 is provided on the top of the fixing ring 613, a slider 563 is movably connected to the inner side of the slide groove 8130, a clamping block 561 is provided on the side of the slider 563, and the clamping block 561 movably penetrates the through-hole 8131 and the inner side of the sleeve 110.

[0024] In this embodiment, a limiting ring 8132 is provided at the fixing ring 613, the limiting ring 951 is pressed against the inside of the limiting ring 8132, the elastic connecting part 952 is wrapped around the outside of the limiting ring 8132 and the fixing ring 613, and the sealing ring 953 is wrapped around the steel pipe 130. At this time, the gap at the opening where the sleeve and the steel pipe 130 cooperate has been blocked by the sealing part 250, so that moisture in the air cannot enter.

[0025] Example 3: Figure 1-Figure 9As shown, the outer side of the fixing ring 613 is connected to a mounting plate 564, and the mounting plate 564 is movably connected to the inner side of the slide groove 8130. A spring 562 is connected between the mounting plate 564 and the slider 563. The lower section of the clamping block 561 is provided with a guide surface 5610. The sealing member 250 includes a limiting ring 951, a connecting portion 952 and a sealing ring 953 made of elastic rubber material. A protective mechanism 140 is provided on the outer side of the sealing member 250. The protective mechanism 140 includes a protective cover 341 with a convex cross-section. A sealing ring 544 that is tightly pressed against the outer wall of the sleeve 110 is embedded on the inner side of the protective cover 341. A threaded barrel 343 is provided on the outer side of the protective cover 341. The threaded barrel 343 is threadedly matched with a fastening bolt 342 that extends into the interior of the protective cover 341.

[0026] In this embodiment, the inner diameter of the limiting ring 951 is larger than the inner diameter of the sealing ring 953. The sealing ring 953 with a smaller inner diameter can adapt to steel pipes 130 of different diameters. The protective mechanism 140 can prevent the seal 250 from direct sunlight and contact with rainwater, which may cause aging and loss of elasticity and sealing; the protective mechanism 140 includes a protective cover 341 with a convex cross-section, and the inside of the protective cover 341 and the outside of the sleeve are provided with threads for mutual connection; after the protective cover 341 is threadedly matched with the sleeve, the inside is tightly pressed against the seal 250, and at the same time, the seal 250 can be prevented from falling off. The sealing ring 544 is used to prevent rainwater from penetrating from the threaded matching position and contacting the seal 250, and the fastening bolt 342 is used to press against the side wall of the steel pipe 130 to further ensure the stability between the steel pipe 130 and the sleeve 110.

[0027] In the present invention, when the protective steel pipe plugging joint for long-distance secondary cable laying is used, the cable in the steel pipe 130 is first passed through the seal 250 into the sleeve 110, and then passed through the cable hole 412 to the interface 411 of the sleeve 110, and then the corrugated tube 120 is connected to the interface 411 of the sleeve 110. After the cable is connected to the corresponding equipment, the corrugated tube 120 is connected to the interface 411 of the equipment; then the sealing ring 953 of the seal 250 is aligned with the end of the steel pipe 130 and sleeved, at this time, the steel pipe 130 is inserted into the seal 250 and the sleeve 110. When the steel pipe 130 is inserted into the sleeve 110, it will first contact with the clamping block 561. The guide surface 5610 contacts, so that the clamping block 561 automatically retracts and clamps the steel pipe 130, so that the steel pipe 130 remains stable and is convenient for the subsequent rotation of the fastening bolt 342; after the end of the steel pipe 130 is tightly pressed against one end inside the sleeve 110, the fastening bolt 342 is rotated to press against the side wall of the steel pipe 130, and the installation is completed at this time; the seal 250 has sealed the matching gap between the steel pipe 130 and the sleeve 110, and the protective cover 341 has covered and pressed the seal 250 to prevent direct sunlight and rain contact to delay the aging speed of the seal 250 and prevent the seal 250 from falling off. The fastening bolt 342 can further ensure the stability of the steel pipe 130 and the sleeve 110.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art 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 should be included in the protection scope of the present invention.

Claims

1. A protective steel pipe plugging joint for long-distance secondary cable laying, comprising a body (100), characterized in that: The body (100) comprises a sleeve (110), one end of the sleeve (110) is provided with a bellows (120), one end of the bellows (120) is connected to an interface (411), the other end of the sleeve (110) is provided with a steel pipe (130), and the inner side of the interface (411) is provided with a cable hole (412); A clamping piece (260) is provided between the sleeve (110) and the steel pipe (130), and a sealing piece (250) is provided on the outside of the sleeve (110).

2. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 1 is characterized by: A fixing ring (613) is provided at one end of the sleeve (110); a through hole (8131) is provided through the side of the fixing ring (613); the through hole (8131) penetrates the side wall of the sleeve (110); a sliding groove (8130) is provided on the side of the through hole (8131); the sliding groove (8130) penetrates the side wall of the fixing ring (613) and the sleeve (110); and a limiting ring (8132) is provided on the top of the fixing ring (613).

3. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 2 is characterized in that: The inner side of the slide groove (8130) is movably connected to a slider (563), and a clamping block (561) is provided on the side of the slider (563). The clamping block (561) movably penetrates the through opening (8131) and the inner side of the sleeve (110).

4. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 3 is characterized by: The outer side of the fixing ring (613) is connected to a mounting plate (564), the mounting plate (564) is movably connected to the inner side of the sliding groove (8130), and a spring (562) is connected between the mounting plate (564) and the sliding block (563).

5. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 3 is characterized by: The lower section of the clamping block (561) is provided with a guide surface (5610).

6. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 1 is characterized by: The sealing component (250) comprises a limiting ring (951) made of elastic rubber material, a connecting portion (952) and a sealing ring (953).

7. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 1 is characterized by: A protective mechanism (140) is arranged on the outside of the sealing member (250), the protective mechanism (140) comprising a protective cover (341) with a convex cross-section, and a sealing ring (544) is embedded on the inside of the protective cover (341) and is tightly pressed against the outer wall of the sleeve (110).

8. The protective steel pipe plugging joint for long-distance secondary cable laying according to claim 7 is characterized in that: A threaded barrel (343) is provided on the outer side of the protective cover (341), and the threaded barrel (343) is threadably matched with a fastening bolt (342) that extends into the interior of the protective cover (341).

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