Internal thread straight-through pipe joint

Abstract

The utility model relates to the technical field of pipe joints, and belongs to an internal thread straight-through pipe joint which comprises a main body, a protective shell is arranged on the main body, a cylinder body is fixedly arranged in the protective shell, an air bag is fixedly arranged at the other end of the protective shell, and the cylinder body is communicated with the air bag through a liquid cavity. The air bag is attached to the pipeline; a linkage assembly is arranged in the cylinder body, and the linkage assembly is matched with the cylinder body to enable the air bag to expand and contract; when the main body and the pipeline are assembled, the pipeline pushes the push plate to move, the push plate pushes the piston plate to move, then liquid in the cylinder body enters the air bag through the liquid cavity, the air bag is expanded, the air bag is tightly attached to the outer surface of the pipeline, the sealing performance of the matching position of the main body and the pipeline is further improved, and the matching position of the main body and the pipeline is prevented from being corroded.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe joints and relates to an internal thread straight-through pipe joint. Background Art

[0002] The pipe joint is a connecting piece between pipes. In order to make the pipe connection tight and firm, a thread or groove is generally formed at the end of the pipe joint so as to match the pipe thread or groove. The existing pipe joint connection is not firm enough and has poor sealing performance. However, the connection between the existing pipe joint and the pipe lacks a protective structure, which makes the connection between the pipe joint and the pipe easily corroded.

[0003] The prior art is that the patent application document of CN202302393U discloses an internal and external thread straight pipe joint, which is provided with internal and external threads, and the internal and external thread straight pipe joint is also provided with an internal hexagonal wrench hole. The internal hexagonal wrench hole is preferably arranged in the external thread section. The internal and external thread straight pipe joint only needs one joint to connect the "embedded water pipe elbow" and the "angle valve", eliminating the need for multiple different joints to connect and eliminating the hidden danger of leakage; once leakage occurs, it can be quickly unscrewed to identify the leaking point and quickly replaced; however, there is no protective measure after the pipe joint is connected to the pipeline, and the connection between the pipe joint and the pipeline is easily corroded during use.

[0004] In order to solve the above problems, the utility model provides an internal thread straight-through pipe joint. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model proposes an internal thread straight-through pipe joint.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: an internal thread straight-through pipe joint, comprising a main body, a protective shell is arranged on the main body, a cylinder body is fixedly arranged inside the protective shell, an airbag is fixedly arranged at the other end of the protective shell, the cylinder body and the airbag are connected through a liquid cavity; the airbag is fitted with the pipeline; a linkage component is arranged in the cylinder body, and the linkage component cooperates with the cylinder body to make the airbag expand and contract.

[0007] Furthermore, the linkage assembly includes a piston plate, which is slidably arranged in the cylinder body, and a piston rod is fixedly arranged on one side of the piston plate. One end of the piston rod passes through the cylinder body, extends out of the cylinder body and is fixedly connected to a push plate; a spring is sleeved on the piston rod, one end of the spring is fixedly connected to the push plate, and the other end of the spring is fixedly connected to the cylinder body.

[0008] Furthermore, the main body is provided with an external thread which is installed with the pipe thread.

[0009] Furthermore, a rubber pad is provided on one side of the push plate.

[0010] Compared with the prior art, the utility model has the following beneficial effects: when the main body and the pipeline are assembled, the pipeline pushes the push plate to move, and the push plate pushes the piston plate to move, so that the liquid in the cylinder body enters the airbag through the liquid cavity, causing the airbag to expand, and the airbag fits tightly against the outer surface of the pipeline, further increasing the sealing performance of the fitting point between the main body and the pipeline, and preventing the fitting point between the main body and the roller from being corroded. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0013] In the figure: 1. main body; 2. protective shell; 3. airbag; 4. push plate; 5. piston rod; 6. spring; 7. piston plate; 8. cylinder body; 9. liquid chamber. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1-Figure 2 As shown, the technical solution adopted by the utility model is as follows: an internal thread straight pipe joint, comprising a main body 1. A protective shell 2 is fixedly sleeved on the main body 1, and an air bag 3 is fixedly arranged at one end of the protective shell 2 away from the main body 1. An external thread is arranged at one end of the main body 1, and the main body 1 is installed with the pipe thread through the external thread. By using the expansion and contraction of the air bag 3, the air bag 3 is closely fitted to the outer surface of the pipe, the sealing of the main body 1 and the pipe is strengthened, and the main body 1 and the pipe are prevented from being corroded.

[0016] A cylinder 8 is fixedly arranged on the left side of the protective shell 2. The diameter of the cylinder 8 is larger than the diameter of the main body 1. A liquid cavity 9 is arranged in the protective shell 2. A through hole is opened on the inner wall of the protective shell 2, and the liquid cavity 9 is connected with the inside of the airbag 3 through the through hole. The cylinder 8 is connected with the liquid cavity 9 through the through hole.

[0017] A piston plate 7 is sealingly and slidably arranged in the cylinder body 8. The space between the cylinder body 8 and the piston plate 7 forms a cavity for filling liquid. A plurality of piston rods 5 are evenly and fixedly connected to one side of the piston plate 7 along the circumferential direction, and the piston rods 5 are arranged horizontally. One end of the piston rod 5 passes through the cylinder body 8 and extends out of the cylinder body 8 and is fixedly connected to a push plate 4. The piston rod 5 is sealingly and slidably connected to the cylinder body 8. The push plate 4 is slidably connected to the protective shell 2. A spring 6 is sleeved on the piston rod 5 outside the cylinder body 8, one end of the spring 6 is fixedly connected to the push plate 4, and the other end of the spring 6 is fixedly connected to the piston rod 5. A rubber pad is fixedly arranged on the side of the push plate 4 away from the piston rod 5. The setting of the rubber pad prevents the push plate 4 from being worn when the pipeline contacts the push plate 4.

[0018] In summary, in the initial state, the cylinder 8 and the airbag 3 are both filled with liquid.

[0019] When the operator assembles the main body 1 with the pipeline, the pipeline contacts the push plate 4 and pushes the push plate 4 to move toward the cylinder body 8. The push plate 4 pushes the piston rod 5 to move, and the piston rod 5 pushes the piston plate 7 to move, so that the cavity formed between the cylinder body 8 and the piston plate 7 is reduced. When the push plate 4 pushes the piston rod 5 to move, the spring 6 is compressed.

[0020] The piston plate 7 moves to squeeze the liquid in the cylinder 8, so that the liquid in the cylinder 8 enters the liquid cavity 9 through the through hole and finally enters the airbag 3. When the main body 1 and the pipeline are installed, the airbag 3 fits tightly with the outer surface of the pipeline, so that the main body 1 and the pipeline are well sealed and the main body 1 and the pipeline are prevented from being corroded.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or 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 female straight pipe joint, characterized in that: include: A main body (1) is provided with a protective shell (2), a cylinder (8) is fixedly provided in the protective shell (2), an airbag (3) is fixedly provided at the other end of the protective shell (2), the cylinder (8) and the airbag (3) are connected through a liquid cavity (9); the airbag (3) is fitted with a pipeline; a linkage component is provided in the cylinder (8), and the linkage component cooperates with the cylinder (8) to make the airbag (3) expand and contract.

2. The female straight pipe joint according to claim 1, characterized in that: The linkage assembly comprises a piston plate (7), which is sealingly and slidably arranged in a cylinder body (8); a piston rod (5) is fixedly arranged on one side of the piston plate (7); one end of the piston rod (5) passes through the cylinder body (8), extends out of the cylinder body (8) and is fixedly connected to a push plate (4); a spring (6) is sleeved on the piston rod (5), one end of the spring (6) is fixedly connected to the push plate (4), and the other end of the spring (6) is fixedly connected to the cylinder body (8).

3. The female straight pipe joint according to claim 1, characterized in that: The main body (1) is provided with external threads for installation with pipe threads.

4. The female straight pipe joint according to claim 2, characterized in that: A rubber pad is provided on one side of the push plate (4).

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