Middle type tightener

Abstract

The utility model discloses a middle type tightener which comprises an upper pressing block, a lower pressing block, a connecting rod and a protective cover, the connecting rod is arranged on the upper pressing block in a penetrating mode and comprises a main body and a connecting portion, the lower pressing block is arranged between the connecting portion and the upper pressing block, the tail end of the connecting rod is provided with a locking sleeve in a threaded connection mode, and the protective cover is arranged on the upper pressing block. A pre-tightening device is arranged between the upper pressing block and the connecting rod, the pre-tightening device comprises an elastic piece, one end of the pre-tightening force of the elastic piece acts on the upper pressing block, the other end of the pre-tightening force of the elastic piece acts on a locking sleeve on the connecting rod, and the pre-tightening device presses the lower pressing block towards the upper pressing block. The upper pressing block and the lower pressing block always keep mutual abutting pre-tightening force, and therefore the beneficial effects that after installation, even if complete locking is not achieved through the locking sleeve, certain stability can still be achieved, the problem of dislocation between the upper pressing block and the lower pressing block is solved, and installation operation is convenient are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cable tensioners, and in particular to an intermediate cable tensioner. Background Art

[0002] As a necessary connector in the installation of high (low) voltage overhead lines, the tensioner plays an indispensable role in fixing the power supply cables. Its convenience, reliability and durability greatly reduce the difficulty of laying cables, providing strong support for the process of urbanization development.

[0003] In the prior art, a one-size-fits-all intermediate tensioner for the middle portion of a cable comprises an upper pressure block, a connecting rod, a lower pressure block and a protective cover. A threaded locking sleeve is provided on the connecting rod to press the upper pressure block and the lower pressure block against each other, thereby achieving compression of the target cable. During use, the tightness can only be adjusted by relying on the threaded fit of the locking sleeve and the connecting rod, which lacks elasticity. As a result, once the compression fit between the lower pressure block and the connecting rod becomes loose, it is easy to disengage. During installation, it is necessary to hold the tensioner with hands at all times and then turn the locking sleeve to tighten it. Therefore, installation is very inconvenient and there is room for improvement. Summary of the Invention

[0004] In response to the above problems, the present application proposes an intermediate type tensioner. By providing a pre-tightening device between the connecting rod and the upper pressing block, the upper pressing block and the lower pressing block are always kept in a pre-tightening force against each other. Thus, even if the locking sleeve is not fully locked during installation, a certain stability is achieved, thereby preventing the upper pressing block and the lower pressing block from dislocating, and facilitating the installation operation. The intermediate type tensioner is specifically implemented through the following technical solutions:

[0005] An intermediate tensioner comprises: an upper pressure block, a lower pressure block, a connecting rod and a protective cover, the connecting rod is arranged through the upper pressure block, the connecting rod comprises a main body and a connecting part, the lower pressure block is arranged between the connecting part and the upper pressure block, the end of the connecting rod is threadedly connected with a locking sleeve, the protective cover is arranged on the upper pressure block, a pre-tightening device is arranged between the upper pressure block and the connecting rod, the pre-tightening device comprises an elastic member, the pre-tightening force of the elastic member acts on the upper pressure block at one end, and acts on the locking sleeve on the connecting rod at the other end, and the pre-tightening device presses the lower pressure block toward the upper pressure block.

[0006] It is further provided that the locking sleeve includes an operating portion and a tightening portion, the upper pressure block is extended toward the lower pressure block to provide an installation cavity, the elastic member is provided in the installation cavity, the upper end of the elastic member is abutted against the tightening portion, and the lower end of the elastic member is abutted against the inner wall of the installation cavity. Through this provision, one end of the pre-tightening force of the elastic member is in direct contact with the upper pressure block, and the other end is transmitted to the lower pressure block, so that the upper pressure block and the lower pressure block are kept tightly pressed, and the overall structure is more stable.

[0007] It is further provided that an annular gasket is provided in the mounting cavity, and the annular gasket is provided between the elastic member and the pressing portion. Through this arrangement, the pressing portion reduces the rotational friction on the elastic member during rotation, thereby increasing the service life of the elastic member and improving the overall stability.

[0008] It is further provided that the outer end of the installation cavity is also provided with a limiting flange for limiting the installation of the elastic member. Through this setting, the lower end position of the elastic member is limited, making the structure of the pre-tightening device more stable.

[0009] It is further configured that the elastic member is configured as a compression spring, which facilitates procurement and installation.

[0010] It is further configured that the connecting rods are provided in two, and the connecting portion of the connecting rod is provided in a hook shape, and the hooks of the two connecting portions are facing oppositely. Through this configuration, the connecting rod is not easy to detach during the connection process with the lower pressure block, and the overall connection structure is more stable.

[0011] It is further provided that a compression pad is provided on the lower pressing block toward the upper pressing block. Through this provision, the connection with the insulating end of the installation position is more stable, the force is more uniform, and the overall structure is more stable.

[0012] It is further provided that an active cavity is provided on the protective cover corresponding to the projection position of the connecting rod. When the protective cover is provided on the upper pressure block, the end of the connecting rod extends into the active cavity. Through this setting, the metal parts are hidden to prevent the occurrence of electric shock hazards, and the active position of the connecting rod is freed to prevent interference, and the overall structure is tighter and more stable.

[0013] It is further provided that a card block is provided on the outer edge of the upper pressure block, and the protective cover is provided with a buckle corresponding to the card block. The protective cover is detachably installed on the upper pressure block through the card connection between the card block and the buckle. Through this setting, the protective cover can be detachably installed, the metal parts can be hidden, and the occurrence of electric shock hazards can be prevented.

[0014] In summary, the intermediate tensioner, by arranging a pre-tightening device between the connecting rod and the upper pressure block, ensures that the upper pressure block and the lower pressure block always maintain a pre-tightening force against each other, thereby achieving a certain stability after installation even if it is not completely locked by the locking sleeve, preventing the problem of dislocation between the upper pressure block and the lower pressure block, and facilitating the installation operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of the exploded structure of the intermediate tensioner provided in an embodiment of the present application;

[0017] Figure 2 A cross-sectional view of a pre-tightening device of an intermediate tensioner provided in an embodiment of the present application;

[0018] Figure 3 The intermediate tensioner provided in the embodiment of the present application Figure 2 Enlarged view of part A in the middle.

[0019] Among them, the reference numerals in the figures are:

[0020] 1. Upper pressure block; 2. Lower pressure block; 3. Connecting rod; 4. Protective cover; 5. Main body; 6. Connecting part; 7. Locking sleeve; 8. Pre-tightening device; 9. Elastic member; 10. Operating part; 11. Tightening part; 12. Mounting cavity; 13. Annular gasket; 14. Limiting flange; 15. Compression spring; 16. Pressing pad; 17. Movable cavity; 18. Clamping block; 19. Buckle. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor does it mean independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The present application is now further described with reference to the accompanying drawings and specific embodiments:

[0024] Please also refer to Figures 1 to 3 , an intermediate tensioner, comprising: an upper pressure block 1, a lower pressure block 2, a connecting rod 3 and a protective cover 4, the connecting rod 3 is arranged on the upper pressure block 1, the connecting rod 3 includes a main body 5 and a connecting portion 6, the lower pressure block 2 is arranged between the connecting portion 6 and the upper pressure block 1, the end of the connecting rod 3 is threadedly connected and provided with a locking sleeve 7, the protective cover 4 is arranged on the upper pressure block 1, a pre-tightening device 8 is provided between the upper pressure block 1 and the connecting rod 3, the pre-tightening device 8 includes an elastic member 9, the pre-tightening force of the elastic member 9 acts on the upper pressure block 1 at one end, and acts on the locking sleeve 7 on the connecting rod 3 at the other end, the pre-tightening device 8 The lower pressing block 2 is pressed toward the upper pressing block 1. Through this arrangement, the pre-tightening force of the upper end of the elastic member 9 acts directly on the upper pressing block 1, and the lower end of the elastic member 9 is against the locking sleeve 7. The locking sleeve 7 is connected to the connecting rod 3, so the pre-tightening force is transmitted to the connecting rod 3. The connecting rod 3 is pressed toward the upper pressing block 1 during the installation process. The lower pressing block 2 is arranged on the connecting portion 6 of the connecting rod 3, and the pre-tightening force is transmitted to the lower pressing block 2, and finally the pre-tightening force of the elastic member 9 is transmitted to the lower pressing block 2, so that the mutual compression between the upper pressing block 1 and the lower pressing block 2 is achieved, thereby achieving the pre-tightening of the upper pressing block 1 and the lower pressing block 2.

[0025] Please refer to the figure Figures 1 to 3In this embodiment, the locking sleeve 7 includes an operating portion 10 and a tightening portion 11. The upper pressing block 1 extends toward the lower pressing block 2 and is provided with a mounting cavity 12. The elastic member 9 is arranged in the mounting cavity 12. The upper end of the elastic member 9 abuts against the tightening portion 11, and the lower end of the elastic member 9 abuts against the inner wall of the mounting cavity 12. The operating portion 10 of the locking sleeve 7 is configured to be a nut for convenient wrench clamping operation, and the inner end of the operating portion 10 forms a limit with the upper pressing block 1, the main function of which is to prevent the tightening portion 11 of the locking sleeve 7 from being too deep into the mounting cavity. The mounting cavity 12 causes the elastic member 9 to be over-pressed and unable to rebound; an annular gasket 13 is further provided in the mounting cavity 12, and the annular gasket 13 is provided between the elastic member 9 and the pressing portion 11. The surface of the annular gasket 13 is polished smooth, and the area of the annular gasket 13 is slightly smaller than the cross-sectional tolerance in the mounting cavity 12, so that the friction between its outer periphery and the inner wall of the mounting cavity 12 is increased. When the locking sleeve 7 is pressed against the annular gasket 13 and rotates, the annular gasket 13 does not rotate or reduces the rotation, thereby achieving a protection effect on the spring. The rotational friction force of the tight sleeve 7 mainly acts on the annular gasket 13; the outer end of the installation cavity 12 is also provided with a limiting flange 14 for the limiting installation of the elastic member 9; the elastic member 9 is provided as a compression spring 15; the connecting rod 3 is provided with two, and the connecting portion 6 of the connecting rod 3 is provided with a hook shape, and the hook shapes of the two connecting portions 6 are facing oppositely. With such a setting, during the practical use of the wire presser, the hook-shaped connecting portion 6 will not be disengaged due to the force received toward one side, and two connecting rods 3 are provided on both sides of the upper pressing block 1 and the lower pressing block 2. end, so that the forces on both ends of the upper pressing block 1 and the lower pressing block 2 are more evenly distributed; a pressing pad 16 is provided on the lower pressing block 2 toward the upper pressing block 1; an active cavity 17 is provided on the protective cover 4 at a projection position corresponding to the connecting rod 3, and when the protective cover 4 is provided on the upper pressing block 1, the end of the connecting rod 3 extends into the active cavity 17; a clamping block 18 is provided on the outer edge of the upper pressing block 1, and a buckle 19 is provided on the protective cover 4 corresponding to the clamping block 18, and the protective cover 4 is mounted on the upper pressing block 1 by the clamping connection between the clamping block 18 and the buckle 19, and can be disassembled and carded.

[0026] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An intermediate tensioner, comprising: An upper pressing block (1), a lower pressing block (2), a connecting rod (3) and a protective cover (4), wherein the connecting rod (3) is arranged on the upper pressing block (1), the connecting rod (3) includes a main body (5) and a connecting portion (6), the lower pressing block (2) is arranged between the connecting portion (6) and the upper pressing block (1), the end of the connecting rod (3) is threadedly connected and provided with a locking sleeve (7), and the protective cover (4) is arranged on the upper pressing block (1), characterized in that a pre-tightening device (8) is provided between the upper pressing block (1) and the connecting rod (3), the pre-tightening device (8) includes an elastic member (9), the pre-tightening force of the elastic member (9) acts on the upper pressing block (1) at one end and acts on the locking sleeve (7) on the connecting rod (3) at the other end, and the pre-tightening device (8) presses the lower pressing block (2) toward the upper pressing block (1).

2. The intermediate tensioner according to claim 1, characterized in that The locking sleeve (7) comprises an operating portion (10) and a pressing portion (11); the upper pressing block (1) is provided with a mounting cavity (12) extending in the direction of the lower pressing block (2); the elastic member (9) is arranged in the mounting cavity (12); the upper end of the elastic member (9) is in contact with the pressing portion (11); and the lower end of the elastic member (9) is in contact with the inner wall of the mounting cavity (12).

3. The intermediate tensioner according to claim 2, characterized in that An annular gasket (13) is also provided in the installation cavity (12), and the annular gasket (13) is provided between the elastic member (9) and the abutting portion (11).

4. The intermediate tensioner according to claim 2, characterized in that The outer end of the installation cavity (12) is also provided with a limiting flange (14) for limiting the installation of the elastic member (9).

5. The intermediate tensioner according to claim 2, characterized in that The elastic member (9) is configured as a compression spring (15).

6. The intermediate tensioner according to claim 1, characterized in that The number of the connecting rods (3) is two, and the connecting portion (6) of the connecting rod (3) is hook-shaped, and the hooks of the two connecting portions (6) face oppositely.

7. The intermediate tensioner according to claim 1, characterized in that The lower pressing block (2) is provided with a pressing pad (16) in the direction toward the upper pressing block (1).

8. The intermediate tensioner according to claim 1, characterized in that An active cavity (17) is provided on the protective cover (4) at a position corresponding to the projection of the connecting rod (3); when the protective cover (4) is arranged on the upper pressing block (1), the end of the connecting rod (3) extends into the active cavity (17).

9. The intermediate tensioner according to claim 1, characterized in that The outer edge of the upper pressing block (1) is provided with a clamping block (18), and the protective cover (4) is provided with a buckle (19) corresponding to the clamping block (18). The protective cover (4) is mounted on the upper pressing block (1) in a detachable manner through the clamping connection between the clamping block (18) and the buckle (19).

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