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

Abstract

The application discloses a protective steel pipe blocking joint for long-distance secondary cable laying, relates to the technical field of cable laying, and comprises a body, wherein the body comprises a sleeve, one end of the sleeve is provided with a bellows, one end of the bellows is connected with a joint, the other end of the sleeve is provided with a steel pipe, and the inner side of the joint is provided with a cable hole. The sealing element is used for sealing the cooperation gap between the steel pipe and the sleeve, the protective cover is used for covering and abutting against the sealing element, the direct sunlight and rainwater are prevented from contacting the sealing element to delay the aging speed of the sealing element, the sealing element is prevented from falling off, the fastening bolt is used for further guaranteeing the stability of the steel pipe and the sleeve, the clamping element is used for keeping stable after the steel pipe end extends into the sleeve, the sealing element is used for wrapping the sleeve and the steel pipe at the same time, the cooperation position of the sleeve and the steel pipe is kept sealed, and the limiting ring is arranged in the fixing ring.

Description

Technical Field

[0001] This invention relates to the field of cable laying technology, specifically to a protective steel pipe sealing joint for long-distance secondary cable laying. Background Technology

[0002] Currently, the control cables used in substations of all voltage levels need to be connected to the online monitoring device of the surge arrester after being led out from the port of the protective steel pipe, and the part of the cable leading 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 the protective steel pipe of control cable", it includes a sleeve and a corrugated pipe. The upper end of the sleeve is closed and the lower end is open. The open end of the sleeve is used to fit onto the port of the protective steel pipe of the control cable. The closed end of the sleeve is fixedly connected to an extension pipe that communicates with the inside of the sleeve. One end of the corrugated pipe is fixedly connected to the top of the extension pipe, and the other end of the corrugated pipe is fixedly connected to the bottom of the online monitoring device of the surge arrester.

[0004] However, cable protection steel pipes come in various specifications with different diameters. The sleeve of the aforementioned joint has a fixed size at one end, and only bolts are installed at the sleeve to tighten it against the steel pipe. This not only fails to accommodate steel pipes of different diameters, but also results in insufficient sealing, allowing moisture in the air to easily enter the sleeve and the steel pipe, thus affecting the safety of the cable. To address these issues, a protective steel pipe sealing joint for long-distance secondary cable laying is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a protective steel pipe sealing joint for long-distance secondary cable laying, so as to solve the problems mentioned in the background art, which are not adaptable to steel pipes of different diameters during operation, and the sealing performance is insufficient, allowing moisture in the air to easily enter the sleeve and steel pipe, thereby affecting the safety of the cable.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a protective steel pipe sealing joint for long-distance secondary cable laying, comprising a body, the body comprising a sleeve, one end of the sleeve being provided with a corrugated pipe, one end of the corrugated pipe being connected to an interface, the other end of the sleeve being provided with a steel pipe, and a cable hole being opened on the inner side of the interface;

[0007] A clamping element is provided between the sleeve and the steel pipe. A sealing element is provided on the outside of the sleeve. The cable in the steel pipe is passed through the sealing element into the sleeve, and then exits through the cable hole at the interface of the sleeve. The corrugated pipe is then connected to the interface of the sleeve. After the cable is connected to the corresponding equipment, the corrugated pipe is connected to the interface of the equipment. Then, the sealing ring of the sealing element is aligned with the end of the steel pipe and fitted. At this time, the steel pipe extends into the sealing element and the sleeve. When the steel pipe extends into the sleeve, it will first contact the guide surface of the clamping block, causing the clamping block to automatically extend and retract to clamp the steel pipe, keeping the steel pipe stable for subsequent... Continue to turn the fastening bolts; after the end of the steel pipe is pressed against the inside of the sleeve, turn the fastening bolts to press against the side wall of the steel pipe, and the installation is complete; the seal has sealed the joint between the steel pipe and the sleeve, and the protective cover has covered and pressed against the seal to prevent direct sunlight and rain from contacting it, thus slowing down the aging of the seal and preventing it from falling off. The fastening bolts can further ensure the stability of the steel pipe and the sleeve. The clamping parts are used to keep the steel pipe stable after the end of the steel pipe is inserted into the sleeve. The seal is used to wrap the sleeve and the steel pipe at the same time, so that the joint between the sleeve and the steel pipe is sealed.

[0008] Preferably, a retaining ring is provided at one end of the sleeve, and a through opening is provided on the side of the retaining ring. The through opening passes through the side wall of the sleeve, and a sliding groove is provided on the side of the through opening. The sliding groove passes through the retaining ring and the side wall of the sleeve. A limit ring is provided at the top of the retaining ring, and a slider is movably connected to the inner side of the sliding groove. A clamping block is provided on the side of the slider, and the clamping block movably passes through the through opening and the inner side of the sleeve.

[0009] Preferably, a fixing ring is provided at one end of the sleeve, and a through-hole is provided on the side of the fixing ring, which penetrates the side wall of the sleeve. A sliding groove is provided on the side of the through-hole, which penetrates the side wall of the fixing ring and the sleeve. A limit ring is provided at the top of the fixing ring, and a limit ring is provided at the fixing ring. The limit ring is pressed against the inside of the limit ring. An elastic connecting part is wrapped around the outside of the limit ring and the fixing ring. A sealing ring is wrapped around the steel pipe. At this time, the gap at the opening where the sleeve and the steel pipe meet is sealed by the sealing element, so that moisture in the air cannot enter.

[0010] Preferably, a slider is movably connected to the inner side of the groove, and a clamping block is provided on the side of the slider. The clamping block movably passes through the inside of the through-hole and 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 extends and retracts to clamp the steel pipe, keeping the steel pipe stable and facilitating subsequent rotation and tightening of the bolts.

[0011] 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 slide groove, and a spring is connected between the mounting plate and the slider.

[0012] Preferably, the lower section of the clamping block is provided with a guide surface.

[0013] Preferably, the sealing element includes a limiting ring made of elastic rubber, a connecting part, and a sealing ring. The sealing ring of the sealing element is aligned with the end of the steel pipe and sleeved, so that the steel pipe can extend into the sealing element and the sleeve.

[0014] Preferably, a protective mechanism is provided on the outer side of the seal, the protective mechanism including a protective cover with a convex cross section, and a sealing ring is embedded on the inner side of the protective cover to abut against the outer wall of the sleeve. The sealing ring is used to prevent rainwater from seeping in from the threaded joint and contacting the seal.

[0015] Preferably, the outer side of the protective cover is provided with a threaded cylinder, and the threaded cylinder is threadedly fitted with a fastening bolt that extends into the interior of the protective cover. The fastening bolt is used to abut against the side wall of the steel pipe to further ensure the stability between the steel pipe and the sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, the gap between the steel pipe and the sleeve is sealed by the sealing element, and the protective cover covers and presses the sealing element to prevent direct sunlight and rainwater from contacting it, thus slowing down the aging of the sealing element and preventing it from falling off. The fastening bolts can further ensure the stability of the steel pipe and the sleeve.

[0018] 2. In this invention, the clamping member is used to keep the steel pipe end stable after it is inserted into the sleeve, and the sealing member is used to wrap the sleeve and the steel pipe at the same time, so that the joint between the sleeve and the steel pipe is sealed.

[0019] 3. In this 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 sleeve and the steel pipe meet is sealed by the sealing element, so that moisture in the air cannot enter. Attached Figure Description

[0020] Figure 1 This is a perspective view of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention;

[0021] Figure 2 This is an exploded structural diagram of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention.

[0022] Figure 3 This is an exploded structural diagram of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention from another angle.

[0023] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention.

[0024] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the diagram;

[0025] Figure 6 This is a schematic diagram of the sleeve structure of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention;

[0026] Figure 7 This is a schematic diagram of the sleeve structure of the protective steel pipe sealing joint for long-distance secondary cable laying according to the present invention from another angle.

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B in the diagram;

[0028] Figure 9 This is a schematic diagram of the sealing structure of the protective steel pipe plugging joint for long-distance secondary cable laying according to the present invention.

[0029] In the picture:

[0030] 100. Body; 110. Sleeve; 120. Bellows; 130. Steel pipe; 140. Protective mechanism; 250. Seal; 260. Clamping part; 341. Protective cover; 342. Fastening bolt; 343. Threaded cylinder; 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. Limiting ring; 951. Limiting ring; 952. Connecting part; 953. Sealing ring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: As Figures 1-9 As shown, the present invention provides a technical solution: a protective steel pipe sealing joint for long-distance secondary cable laying, including a body 100, the body 100 including a sleeve 110, one end of the sleeve 110 is provided with a corrugated pipe 120, one end of the corrugated pipe 120 is connected to an interface 411, the other end of the sleeve 110 is provided with a steel pipe 130, and a cable hole 412 is opened on the inner side of the interface 411.

[0033] A clamping element 260 is provided between the sleeve 110 and the steel pipe 130, and a sealing element 250 is provided on the outside of the sleeve 110.

[0034] In this embodiment, the cable in the steel pipe 130 passes through the seal 250 into the sleeve 110, and then exits through the cable hole 412 at the interface 411 of the sleeve 110. The corrugated pipe 120 is then connected to the interface 411 of the sleeve 110. After connecting the cable to the corresponding equipment, the corrugated pipe 120 is connected to the interface 411 of that equipment. Then, the sealing ring 953 of the seal 250 is aligned with the end of the steel pipe 130 and fitted. At this point, the steel pipe 130 extends into the seal 250 and the sleeve 110. When the steel pipe 130 extends into the sleeve 110, it first contacts the guide surface 5610 of the clamping block 561, causing the clamping block 561 to automatically extend and retract to clamp the steel pipe 130, keeping the steel pipe 130 stable and facilitating subsequent rotation and tightening of the bolt 34. 2. After the end of the steel pipe 130 is pressed against the inside of the sleeve 110, rotate the fastening bolt 342 to press against the side wall of the steel pipe 130. At this time, the installation is completed. The sealing element 250 has sealed the joint between the steel pipe 130 and the sleeve 110. The protective cover 341 has covered and pressed against the sealing element 250 to prevent direct sunlight and rainwater from contacting it, thus slowing down the aging speed of the sealing element 250 and preventing the sealing element 250 from falling off. The fastening bolt 342 can further ensure the stability of the steel pipe 130 and the sleeve 110. The clamping element 260 is used to keep the steel pipe 130 stable after the end of the steel pipe 130 is inserted into the sleeve 110. The sealing element 250 is used to wrap the sleeve 110 and the steel pipe 130 at the same time, so that the joint between the sleeve 110 and the steel pipe 130 is sealed.

[0035] Example 2: As Figures 1-9 As shown, a retaining ring 613 is provided at one end of the sleeve 110. A through-hole 8131 is provided on the side of the retaining ring 613, which passes through the side wall of the sleeve 110. A sliding groove 8130 is provided on the side of the through-hole 8131, which passes through the retaining ring 613 and the side wall of the sleeve 110. A limit ring 8132 is provided at the top of the retaining ring 613. A slider 563 is movably connected to the inner side of the sliding groove 8130. A clamping block 561 is provided on the side of the slider 563, which movably passes through the through-hole 8131 and the inner side of the sleeve 110.

[0036] In this embodiment, a limiting ring 8132 is provided at the fixing ring 613, and 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 meet has been sealed by the sealing element 250, so that moisture in the air cannot enter.

[0037] Example 3: As Figures 1-9As shown, a mounting plate 564 is connected to the outer side of the fixing ring 613. 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. A guide surface 5610 is provided on the lower section of the clamping block 561. The sealing element 250 includes a limit ring 951 made of elastic rubber, a connecting part 952 and a sealing ring 953. A protective mechanism 140 is provided on the outer side of the sealing element 250. The protective mechanism 140 includes a protective cover 341 with a convex cross section. A sealing ring 544 is embedded on the inner side of the protective cover 341 and abuts against the outer wall of the sleeve 110. A threaded cylinder 343 is provided on the outer side of the protective cover 341. A fastening bolt 342 that extends into the protective cover 341 is threadedly engaged with the threaded cylinder 343.

[0038] 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 accommodate steel pipes 130 of different diameters. The protective mechanism 140 can prevent the sealing element 250 from being exposed to direct sunlight and from contacting rainwater, which would cause it to age, lose elasticity, and lose its sealing performance. The protective mechanism 140 includes a protective cover 341 with a convex cross-section. The protective cover 341 and the sleeve are provided with threads for mutual connection. After the protective cover 341 is threaded with the sleeve, it is pressed against the sealing element 250, which can prevent the sealing element 250 from falling off. The sealing ring 544 is used to prevent rainwater from seeping into the sealing element 250 from the threaded connection. 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.

[0039] In this invention, the protective steel pipe sealing joint for long-distance secondary cable laying is used as follows: First, the cable in the steel pipe 130 passes through the sealing member 250 into the sleeve 110, and then exits through the cable hole 412 at the interface 411 of the sleeve 110. Next, the corrugated pipe 120 is connected to the interface 411 of the sleeve 110. After connecting the cable to the corresponding equipment, the corrugated pipe 120 is connected to the interface 411 of the equipment. Then, the sealing ring 953 of the sealing member 250 is aligned with the end of the steel pipe 130 and fitted. At this time, the steel pipe 130 extends into the sealing member 250 and the sleeve 110. When the steel pipe 130 extends into the sleeve 110, it will first contact the clamping block 561. When the guide surface 5610 contacts, the clamping block 561 automatically extends and retracts to clamp the steel pipe 130, keeping the steel pipe 130 stable and facilitating the subsequent rotation of the fastening bolt 342. After the end of the steel pipe 130 is pressed against one end of the sleeve 110, the fastening bolt 342 is rotated to press against the side wall of the steel pipe 130, thus completing the installation. The sealing element 250 has sealed the gap between the steel pipe 130 and the sleeve 110, and the protective cover 341 has covered and pressed against the sealing element 250 to prevent direct sunlight and rainwater from contacting it, thus slowing down the aging rate of the sealing element 250 and preventing the sealing element 250 from falling off. The fastening bolt 342 can further ensure the stability of the steel pipe 130 and the sleeve 110.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective steel pipe closure 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 with an interface (411), the other end of the sleeve (110) is provided with a steel pipe (130), the inner side of the interface (411) is provided with a cable hole (412); the sleeve (110) and the steel pipe (130) are provided with a clamping piece (260), the outer side of the sleeve (110) is provided with a sealing piece (250); One end of the sleeve (110) is provided with a fixing ring (613), the side surface of the fixing ring (613) is provided with a through hole (8131), the through hole (8131) penetrates the side wall of the sleeve (110), the side surface of the through hole (8131) is provided with a sliding groove (8130), the sliding groove (8130) penetrates the side wall of the fixing ring (613) and the sleeve (110), the top of the fixing ring (613) is provided with a limiting ring (8132); The inner side of the sliding groove (8130) is movably connected with a sliding block (563), the side surface of the sliding block (563) is provided with a clamping block (561), the clamping block (561) movably penetrates the inner side of the through hole (8131) and the sleeve (110); The outer side of the fixing ring (613) is connected with a mounting plate (564), the mounting plate (564) is movably connected with the inner side of the sliding groove (8130), the mounting plate (564) and the sliding block (563) are connected with a spring (562); The lower section of the clamping block (561) is provided with a guide surface (5610); The sealing piece (250) comprises a limiting ring (951) made of rubber material with elasticity, a connecting part (952) and a sealing ring (953); The limiting ring (951) abuts against the inside of the limiting ring (8132), the connecting part (952) made of rubber material with elasticity is wrapped outside the limiting ring (8132) and the fixing ring (613), and the sealing ring (953) is wrapped at the steel pipe (130).

2. The protective steel pipe block joint for long distance secondary cable laying according to claim 1, characterized in that: The outer side of the sealing piece (250) is provided with a protection mechanism (140), the protection mechanism (140) comprises a protection cover (341) with a convex cross section, the inner side of the protection cover (341) is embedded with a sealing ring (544) abutting against the outer wall of the sleeve (110).

3. A blocking joint for long distance secondary cable laying protection steel pipes according to claim 2, characterized in that: The outer side of the protection cover (341) is provided with a threaded cylinder (343), the threaded cylinder (343) is threadedly connected with a fastening bolt (342) extending into the inside of the protection cover (341).

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