Extra-high voltage direct current sleeve joint

Abstract

The utility model discloses an extra-high voltage direct current sleeve joint, which relates to the technical field of sleeve joints, and comprises a first joint and a second joint, the second joint is embedded in the first joint, the first joint and the second joint are both connected with cables, a threaded pipe is welded on the outer wall of the first joint, and the threaded pipe is welded on the outer wall of the second joint. The threaded pipe and the first connector are of an integrated structure, limiting grooves are formed in the inner wall of the threaded pipe and the inner wall of the first connector, and the two limiting grooves communicate with each other. By arranging the limiting assembly, the first connector and the second connector can be limited and fixed after being connected, the stability is good, the first connector and the second connector can be further fixed through the threaded pipe and the threaded sleeve, and the stability of connection between the first connector and the second connector is further improved; and the first joint and the second joint can be prevented from gradually loosening after shaking, so that the connection stability between the cables is influenced, and the overall use effect of the cable is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing joints, in particular to an ultra-high voltage direct current bushing joint. Background Art

[0002] Cable casing, also known as protective tube or conduit, is a pipe used to protect wires and cables in electrical installations, allowing wires and cables to be inserted and replaced. Cable casing is a new type of casing material popularized in power engineering, with the advantages of high strength and high rigidity. In order to connect cable casings together, casing joints are usually used for connection.

[0003] However, the traditional bushing joint is simply connected by a threaded head. The threads between the two joints will gradually loosen due to the shaking of the bushing, resulting in poor stability and affecting the overall use of the cable. Therefore, we propose a UHV DC bushing joint. Utility Model Content

[0004] In view of the above problems existing in the existing ultra-high voltage DC bushing joint, the present utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a UHV DC bushing joint, which solves the problem that the traditional bushing joint is simply connected using a threaded head, the threads between the two joints will gradually loosen due to the shaking of the bushing, and the stability is poor, which will affect the overall use effect of the cable.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A UHV DC bushing joint, comprising a first joint and a second joint, wherein the second joint is embedded in the interior of the first joint, the first joint and the second joint are both connected to a cable, a threaded tube is welded on the outer wall of the first joint, the threaded tube and the first joint are in an integrated structure, a limiting groove is provided on the threaded tube and the inner wall of the first joint, the two limiting grooves are interconnected, a guide groove is provided in the interior of the first joint, a limiting assembly is provided on the first joint, the limiting assembly comprises a guide rod and a spring, the guide rod is embedded in the guide groove, one end of the guide rod is fixedly connected to a limiting block, the The other end of the guide rod passes through the first joint and extends to the outside of the first joint. A baffle is fixedly connected to the guide rod, and the spring is nested on the guide rod. One end of the spring is connected to the top outer wall of the baffle, and the other end of the spring is connected to the top inner wall of the guide groove. A clamping block is welded on the second joint, and the second joint is engaged with the limiting groove through the clamping block. By setting a limiting assembly, after the first joint and the second joint are connected, the two can be limited and fixed, and the stability is good, which can prevent the first joint and the second joint from gradually loosening after shaking, affecting the stability of the connection between the cables and the overall use effect of the cables.

[0008] Preferably, the baffle plate is consistent with the guide groove in size and structure, and the outer wall of the baffle plate is fitted and connected to the inner wall of the guide groove, which can limit the guide rod to prevent it from swinging randomly during the lifting process and affecting the use effect. After the limit block and the clamping block are clamped together, it can be ensured that the limit block will not shake randomly, thereby improving the stability of the clamping between the limit block and the clamping block.

[0009] Preferably, a pull ring is fixedly connected to the through end of the guide rod, and a rubber sleeve is embedded in the pull ring, which can facilitate users to move the guide rod through the pull ring, thereby improving operational convenience.

[0010] Preferably, a threaded sleeve is nested on the second joint, and the threaded sleeve is threadedly connected to the threaded pipe, which can further fix the first joint and the second joint and further improve the connection stability between the two.

[0011] Furthermore, a first limiting plate and a second limiting plate are fixedly connected to the second joint respectively, and the threaded sleeve is located between the first limiting plate and the second limiting plate, which can limit the threaded sleeve to prevent the threaded sleeve from falling off the first joint due to lack of limiting.

[0012] Preferably, a rotating rod is welded on the outer wall of the threaded sleeve, and there are two rotating rods. The two rotating rods are symmetrically distributed on the outer wall of the threaded sleeve, which can facilitate users to manually rotate the threaded sleeve and improve operational convenience.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] 1. The utility model provides a limit assembly, which can limit and fix the first connector and the second connector after they are connected, and has good stability, which can prevent the first connector and the second connector from gradually loosening after shaking, affecting the stability of the connection between the cables and the overall use effect of the cables.

[0015] 2. The utility model, by providing the threaded pipe and the threaded sleeve, can further fix the first joint and the second joint after they are fixed, thereby further improving the stability of the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the overall connection structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the expanded structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the first joint of the utility model;

[0020] Figure 4 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0021] Description of reference numerals:

[0022] 1. First joint; 2. Second joint; 3. Cable; 4. Threaded sleeve; 5. Threaded tube; 6. Limiting groove; 7. Limiting assembly; 701. Guide rod; 702. Limiting block; 703. Baffle; 704. Spring; 705. Pull ring; 8. Block; 9. First limiting plate; 10. Second limiting plate; 11. Rotating rod; 12. Guide groove. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The utility model embodiment discloses an ultra-high voltage direct current bushing joint.

[0025] The utility model provides Figure 1-4A UHV DC bushing joint shown in the figure comprises a first joint 1 and a second joint 2, the second joint 2 is embedded in the interior of the first joint 1, the first joint 1 and the second joint 2 are both connected with a cable 3, a threaded tube 5 is welded on the outer wall of the first joint 1, the threaded tube 5 and the first joint 1 are in an integrated structure, and a limiting groove 6 is provided on the inner wall of the threaded tube 5 and the first joint 1, and the two limiting grooves 6 are interconnected, a guide groove 12 is provided inside the first joint 1, and a limiting component 7 is provided on the first joint 1, and the limiting component 7 comprises a guide rod 701 and a spring 704, the guide rod 701 is engaged and connected in the guide groove 12, one end of the guide rod 701 is fixedly connected to the limiting block 702, the other end of the guide rod 701 passes through the first joint 1 and extends to the outside of the first joint 1, the guide rod 701 is fixedly connected with a baffle 703, the spring 704 is nested on the guide rod 701, one end of the spring 704 is connected to the top outer wall of the baffle 703, and the other end of the spring 704 is connected to the top inner wall of the guide groove 12, a clamping block 8 is welded on the second joint 2, and the second joint 2 is engaged and connected with the limiting groove 6 through the clamping block 8;

[0026] When connecting, align the block 8 on the second joint 2 with the limiting groove 6, and then insert the second joint 2 into the first joint 1. When the second joint 2 is inserted into the first joint 1, the block 8 will contact the limiting block 702, and will encounter a little resistance at this time. Then continue to insert the second joint 2 inward. The second joint 2 will push the limiting block 702 to move upward during the movement. When the block 8 loses contact with the limiting block 702, the limiting block 702 will return to its original position under the elastic action of the spring 704, and limit the block 8. At this time, the block 8 cannot move or shake under the limiting action of the limiting groove 6 and the limiting block 702. The connection between the first joint 1 and the second joint 2 is completed. When the two need to be separated, pull the guide rod 701 to drive the limiting block 702 to move upward. At this time, the block 8 loses its limiting effect and can be pulled out of the first joint 1.

[0027] The baffle plate 703 is consistent with the guide groove 12 in size and structure, and the outer wall of the baffle plate 703 is closely connected to the inner wall of the guide groove 12 .

[0028] In order to facilitate and quickly pull the guide rod 701, Figure 1-4 As shown, a pull ring 705 is fixedly connected to the through end of the guide rod 701 , and a rubber sleeve is embedded on the pull ring 705 .

[0029] To further improve the connection stability, such as Figure 1-4 As shown, a threaded sleeve 4 is embedded in the second joint 2, and the threaded sleeve 4 is threadedly connected to the threaded pipe 5;

[0030] The threaded sleeve 4 is rotated so that the threaded sleeve 4 and the threaded tube 5 are fixed by a threaded connection. Since the first joint 1 and the second joint 2 have been limited and fixed by the limiting assembly 7, the first joint 1 and the second joint 2 will not shake at will, and the threaded sleeve 4 and the threaded tube 5 will not loosen.

[0031] In order to limit the threaded sleeve 4, Figure 1-3 As shown, the first limiting plate 9 and the second limiting plate 10 are fixedly connected to the second joint 2, and the threaded sleeve 4 is located between the first limiting plate 9 and the second limiting plate 10;

[0032] A rotating rod 11 is welded on the outer wall of the threaded sleeve 4. There are two rotating rods 11, which are symmetrically distributed on the outer wall of the threaded sleeve 4.

[0033] When in use, first align the block 8 on the second joint 2 with the limiting groove 6, and then insert the second joint 2 into the first joint 1. When the second joint 2 is inserted into the first joint 1, the block 8 will contact the limiting block 702, and will encounter a little resistance at this time. Then continue to insert the second joint 2 inwardly. The second joint 2 will push the limiting block 702 to move upward during the movement. When the block 8 loses contact with the limiting block 702, the limiting block 702 will return to its original position under the elastic action of the spring 704, and limit the block 8. At this time, the block 8 cannot move or shake under the limiting action of the limiting groove 6 and the limiting block 702, and the first joint 2 After the connection between the first joint 1 and the second joint 2 is completed, the threaded sleeve 4 is then rotated to fix the threaded sleeve 4 and the threaded tube 5 through a threaded connection. Since the first joint 1 and the second joint 2 have been limited and fixed by the limiting assembly 7, the first joint 1 and the second joint 2 will not shake at will, so that the threaded sleeve 4 and the threaded tube 5 will not loosen. The first joint 1 and the second joint 2 can be further fixed to further improve the stability of the connection between the two. When the two need to be separated, the guide rod 701 is pulled to drive the limit block 702 to move upward. At this time, the block 8 loses its limiting effect and can be pulled out of the first joint 1.

[0034] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A UHV DC bushing joint, comprising a first joint (1) and a second joint (2), characterized in that: The second joint (2) is embedded in the interior of the first joint (1); the first joint (1) and the second joint (2) are both connected to a cable (3); a threaded tube (5) is welded on the outer wall of the first joint (1); the threaded tube (5) and the first joint (1) are in an integrated structure; the threaded tube (5) and the inner wall of the first joint (1) are both provided with a limiting groove (6); the two limiting grooves (6) are interconnected; a guide groove (12) is provided inside the first joint (1); a limiting assembly (7) is provided on the first joint (1); the limiting assembly (7) comprises a guide rod (701) and a spring (704); the guide rod (701) is embedded in the guide rod (701) and the ... is connected to the first The guide rod (701) is connected to the guide groove (12); one end of the guide rod (701) is fixedly connected to the limiting block (702); the other end of the guide rod (701) passes through the first joint (1) and extends to the outside of the first joint (1); a baffle (703) is fixedly connected to the guide rod (701); the spring (704) is nested on the guide rod (701); one end of the spring (704) is connected to the top outer wall of the baffle (703); the other end of the spring (704) is connected to the top inner wall of the guide groove (12); a clamping block (8) is welded to the second joint (2); and the second joint (2) is connected to the limiting groove (6) by the clamping block (8).

2. The UHV DC bushing joint according to claim 1, characterized in that: The baffle plate (703) and the guide groove (12) are consistent in size and structure, and the outer wall of the baffle plate (703) is closely connected to the inner wall of the guide groove (12).

3. The UHV DC bushing joint according to claim 1, characterized in that: A pull ring (705) is fixedly connected to the through end of the guide rod (701), and a rubber sleeve is nested on the pull ring (705).

4. The UHV DC bushing joint according to claim 1, characterized in that: A threaded sleeve (4) is nested on the second joint (2), and the threaded sleeve (4) is threadedly connected to the threaded pipe (5).

5. The UHV DC bushing joint according to claim 4, characterized in that: The second joint (2) is respectively fixedly connected with a first limit plate (9) and a second limit plate (10), and the threaded sleeve (4) is located between the first limit plate (9) and the second limit plate (10).

6. The UHV DC bushing joint according to claim 4, characterized in that: A rotating rod (11) is welded on the outer wall of the threaded sleeve (4), and there are two rotating rods (11). The two rotating rods (11) are symmetrically distributed on the outer wall of the threaded sleeve (4).

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