Thread protector

Abstract

The utility model relates to the technical field of threads, in particular to a thread protector which comprises protective cylinders which are sequentially connected in a sliding and sleeved mode from inside to outside, meshing threads are arranged on the inner walls of ports of the innermost set of protective cylinders, and a blocking plate is fixed to a bottom opening of the outermost set of protective cylinders. And meanwhile, every two adjacent sets of protection cylinders are connected through an elastic piece, the multiple sets of protection cylinders are integrally in a contracted state in the initial state due to the arrangement of the elastic pieces, and the multiple sets of protection cylinders stretch along with the length of the threads to be protected through meshing of the meshing threads and the threads to be protected in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of threads, in particular to a thread protector. Background Art

[0002] The main function of a thread protector is to cover the threads when they are not in use, protecting them from external environmental influences such as corrosion, rust or physical damage.

[0003] There are various specifications of thread lengths for the same diameter, so thread protectors of different lengths are often required, resulting in a wide variety of thread protector specifications. Therefore, this solution provides a thread protector that can adjust the overall length. Utility Model Content

[0004] The utility model aims at least to solve the problem in the prior art that the length of the thread protector needs to be selected according to the length of the thread.

[0005] The present invention provides a thread protector, which is achieved by the following specific technical means: it comprises protective tubes which are slidably sleeved from the inside to the outside in sequence, the inner wall of the port of the innermost group of protective tubes is provided with an engaging thread, and a sealing plate is fixed to the bottom of the outermost group of the protective tubes, and the two adjacent groups of the protective tubes are connected by elastic parts. When in use, the engaging threads engage with the threads to be protected, and the multiple groups of protective tubes are extended along with the length of the threads to be protected.

[0006] Preferred technical solution one: a movable cylinder is inserted into the innermost group of protective cylinders, and the inner wall of the movable cylinder is also provided with an engaging thread. At the same time, the outer wall of the movable cylinder is in contact with the inner wall of the innermost group of protective cylinders. By replacing movable cylinders with different inner diameters, engagement protection of threads to be protected with different diameters can be achieved without replacing the protective cylinder.

[0007] Preferred technical solution two: a connecting ring 1 is fixed to the inner wall of the upper port of the protective tube, and a connecting ring 2 is fixed to the outer wall of the lower port of the protective tube. The connecting ring 1 on the outer group of protective tubes is slidably sleeved on the inner adjacent group of protective tubes, and the connecting ring 2 on one group of protective tubes slides inside the outer adjacent group of protective tubes. The elastic member is installed between the connecting ring 1 of one group of protective tubes and the connecting ring 2 on the inner adjacent group of protective tubes to achieve elastic connection between the two groups of protective tubes.

[0008] Preferred technical solution three: A limiting vertical rod is fixed on the connecting ring 1, and the limiting vertical rod slides through the connecting ring 2 on the inner adjacent group of protective tubes. The setting of the limiting vertical rod ensures that the protective tube will not rotate.

[0009] Preferred technical solution four: a conical plug is inserted into the top opening of the innermost group of the protective tube or the top opening of the movable tube, and the conical plug is an elastic plug.

[0010] The above structure enables this solution to have the following beneficial effects:

[0011] 1. The thread protector composed of multiple sets of protection tubes can be adaptively extended according to the length of the thread, thereby increasing the use range of the protector;

[0012] 2. The movable cylinder and the protective cylinder are detachable, and the thread protection of different diameters can be adapted by replacing movable cylinders with different inner diameters, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0015] Figure 2 This is an exploded view of multiple groups of protective tubes in this scheme;

[0016] Figure 3 This is a schematic diagram of the structure of the protection tube and the movable tube of this scheme;

[0017] Figure 4 This is a cross-sectional view of this scheme;

[0018] Figure 5 This is an exploded view of the protective cylinder, movable cylinder and conical plug of this scheme.

[0019] Among them, 1. protection cylinder, 11. meshing thread, 12. sealing plate, 2. elastic member, 3. movable cylinder, 4. connecting ring 1, 5. connecting ring 2, 6. limiting vertical rod, 7. conical plug. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Example 1, please refer to Figure 1-Figure 4The thread protector comprises a plurality of groups of protective tubes 1 which are slidably sleeved from the inside to the outside in sequence, the inner wall of the port of the innermost group of protective tubes 1 is provided with an engaging thread 11, and the bottom of the outermost group of protective tubes 1 is fixed with a blocking plate 12, and the two adjacent groups of protective tubes 1 are connected by an elastic member 2. The setting of the elastic member 2 makes the plurality of groups of protective tubes 1 in a contracted state as a whole in the initial state, and when in use, the engaging thread 11 is engaged with the thread to be protected, and the plurality of groups of protective tubes 1 are extended along with the length of the thread to be protected;

[0022] A connecting ring 1 4 is fixed to the inner wall of the upper port of each of the protective tubes 1 except the innermost group of protective tubes 1. Meanwhile, a connecting ring 2 5 is fixed to the outer wall of the lower port of each of the protective tubes 1 except the outermost group of protective tubes 1. The connecting ring 1 4 on the outer group of protective tubes 1 is slidably mounted on the inner adjacent group of protective tubes 1. The connecting ring 2 5 on one group of protective tubes 1 slides inside the outer adjacent group of protective tubes 1. The elastic member 2 is installed between the connecting ring 1 4 of one group of protective tubes 1 and the connecting ring 2 5 on the inner adjacent group of protective tubes 1. This realizes elastic connection between the two groups of protective tubes 1 and can also protect the elastic member 2 by utilizing the annular space enclosed by the two groups of protective tubes 1. The elastic member 2 is preferably a spring member.

[0023] Example 2, based on Example 1, please refer to Figure 3-Figure 5 , a thread protector, a movable cylinder 3 is inserted into the innermost group of protection cylinders 1, and the inner wall of the movable cylinder 3 is also provided with an engaging thread 11, and the outer wall of the movable cylinder 3 is in contact with the inner wall of the innermost group of protection cylinders 1. By replacing the movable cylinders 3 with different inner diameters, the engagement protection of threads to be protected with different diameters can be achieved, and the protection cylinder 1 does not need to be replaced, which reduces the cost. As a preferred embodiment, the outer wall of the movable cylinder 3 can be engaged with the engaging thread 11 of the fixed cylinder through an external thread;

[0024] As another preferred embodiment, the outer wall of the movable cylinder 3 is coated with an elastic layer, and the elastic layer is inserted into the movable cylinder 3 to achieve sealing contact between the two.

[0025] Example 3, based on Example 1, please refer to Figure 2 and Figure 4 , threaded protector, a limit vertical rod 6 is fixed on the connecting ring 1 4, and the limit vertical rod 6 slides through the connecting ring 2 5 on an adjacent group of protective tubes 1 on the inner side. The setting of the limit vertical rod 6 ensures that the protective tube 1 will not rotate, and multiple groups of limit vertical rods 6 are set on the side of the connecting ring 1 4.

[0026] Example 4, based on Examples 1 and 2, please refer to Figure 5 , a thread protector, a conical plug 7 is inserted into the top opening of the innermost group of protection tubes 1 or the top opening of the movable tube 3, and the conical plug 7 is an elastic plug to seal the top opening of the thread protector that is not in use.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thread protector, characterized in that: It comprises a plurality of groups of protective tubes (1) which are slidably sleeved in sequence from the inside to the outside, wherein the inner wall of the port of the innermost group of protective tubes (1) is provided with an engaging thread (11), and a sealing plate (12) is fixed to the bottom of the outermost group of protective tubes (1), and two adjacent groups of protective tubes (1) are connected via an elastic member (2).

2. A thread protector according to claim 1, characterized in that: A movable cylinder (3) is inserted into the innermost group of protective cylinders (1), and the inner wall of the movable cylinder (3) is also provided with an engaging thread (11). At the same time, the outer wall of the movable cylinder (3) contacts the inner wall of the innermost group of protective cylinders (1).

3. A thread protector according to claim 1, characterized in that: A connecting ring 1 (4) is fixed to the inner wall of the upper end of the protective tube (1), and a connecting ring 2 (5) is fixed to the outer wall of the lower end of the protective tube (1). The connecting ring 1 (4) on the outer group of protective tubes (1) is slidably sleeved on the inner adjacent group of protective tubes (1), and the connecting ring 2 (5) on the outer adjacent group of protective tubes (1) slides inside the outer adjacent group of protective tubes (1). The elastic member (2) is installed between the connecting ring 1 (4) of one group of protective tubes (1) and the connecting ring 2 (5) on the inner adjacent group of protective tubes (1).

4. A thread protector according to claim 3, characterized in that: A limiting vertical rod (6) is fixed on the connecting ring 1 (4), and the limiting vertical rod (6) slides through the connecting ring 2 (5) on the inner adjacent group of protective tubes (1).

5. A thread protector according to claim 2, characterized in that: A conical plug (7) is inserted into the top opening of the innermost group of protective tubes (1) or the top opening of the movable tube (3), and the conical plug (7) is an elastic plug.

6. A thread protector according to claim 3, characterized in that: The innermost group of protection tubes (1) is provided with a second connection ring (5) only at the bottom port, while the outermost group of protection tubes (1) is provided with a first connection ring (4) only at the top port.

Images