Connecting pipe fitting

Abstract

The utility model discloses a connecting pipe fitting which comprises a pipe body, one end of the pipe body is provided with a widened section communicated with the pipe body, the widened section is provided with a pipe opening, the inner diameter of the widened section is larger than that of the pipe body, and the connecting pipe fitting is characterized in that a sealing plug used for sealing the pipe opening is inserted in the widened section, and the sealing plug is connected with the pipe opening. A connecting hole communicated with the pipe body is formed in the sealing plug in the axial direction in a penetrating mode, the gap between the widened section of the pipe body and the steel pipe is filled with the sealing plug, therefore, sealing protection of the connecting position of the connecting pipe fitting and the steel pipe is achieved, and compared with the prior art, operation is convenient, and later maintenance of the connecting pipe fitting is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipes, in particular to a connecting pipe fitting. Background Art

[0002] At present, pipe fittings and steel pipes are mostly connected by threads, but the connecting threads of the two are exposed to the external environment after connection. Under the influence of the humid environment, they are prone to rust. Especially for pipe fittings installed outdoors, due to the corrosion of rainfall, acidic and alkaline substances in the atmosphere, and ultraviolet rays, the service life of the threaded connection parts of pipe fittings and steel pipes is further affected. At the same time, the threaded connection parts of pipe fittings and steel pipes are not easy to disassemble and replace after rusting.

[0003] The utility model patent with Chinese application number 201721276584.0 discloses a wide-edge pipe fitting, including a pipe fitting body, the pipe fitting body having a pipe mouth, and also including a pipe mouth widening section of the pipe fitting body, the pipe mouth of the pipe fitting body and the pipe mouth widening section of the pipe fitting body are integrally connected and formed, the outer diameter of the pipe mouth widening section of the pipe fitting body along the vertical section of the pipe mouth is 1-2mm larger than the outer diameter of the pipe fitting body along the vertical section of the pipe mouth, the inner diameter of the pipe mouth widening section of the pipe fitting body along the vertical section of the pipe mouth is 1-2mm larger than the inner diameter of the pipe fitting body along the vertical section of the pipe mouth, the length of the pipe mouth widening section of the pipe fitting body is 3-8mm, after the wide-edge pipe fitting and the steel pipe are installed, the sealing material is filled into the space corresponding to the steel pipe or pipe fitting of the wide-edge pipe fitting body pipe mouth widening section, so that the threaded connection part of the pipe fitting and the steel pipe is no longer exposed to the external environment, and the threaded connection part of the pipe fitting and the steel pipe is sealed and protected.

[0004] However, the method of using sealing materials to fill the space corresponding to the widened section of the pipe body of the wide-edge pipe fitting and the steel pipe or pipe fitting is not only inconvenient to operate the sealing materials during filling, but also inconvenient to replace the sealing materials after filling. When maintaining the pipe fittings, the filling materials must be removed first, which increases the maintenance cost. Utility Model Content

[0005] The utility model aims to provide a connecting pipe fitting, which solves the problem of inconvenient operation when a sealing material is used to fill the widened section of the connecting pipe fitting and a steel pipe.

[0006] The utility model is realized through the following technical solutions.

[0007] A connecting pipe fitting comprises a pipe body, one end of which is provided with a widened section connected to the pipe body, the widened section having a pipe opening, the inner diameter of the widened section being larger than the inner diameter of the pipe body, and characterized in that a sealing plug for sealing the pipe opening is inserted into the widened section, and a connecting hole connected to the pipe body is opened on the sealing plug along its axial direction.

[0008] As a further improvement of the present invention, the sealing plug includes a sealing portion which is inserted into the pipe opening and seals with the widened section.

[0009] As a further improvement of the present invention, the outer diameter of the sealing portion is greater than the inner diameter of the widened section, so that the outer surface of the sealing portion fits tightly with the inner surface of the widened section.

[0010] As a further improvement of the present invention, the outer diameter of the sealing portion gradually decreases along the direction in which the sealing plug is inserted into the pipe opening.

[0011] As a further improvement of the present invention, the sealing plug is made of elastic material in one piece.

[0012] As a further improvement of the present invention, the sealing portion and the widened section are threaded seals.

[0013] As a further improvement of the present invention, the diameter of the connecting hole gradually decreases along the direction in which the sealing plug is inserted into the pipe opening.

[0014] As a further improvement of the present invention, a positioning portion is sleeved on the outer surface of the sealing portion, and the positioning portion is located outside the pipe opening. The positioning portion can abut against the widened section to limit the position of the sealing portion.

[0015] As a further improvement of the present invention, the positioning portion has an outer shape of a regular hexagon.

[0016] As a further improvement of the utility model, the connecting pipe is one of a straight pipe, a three-way pipe, and a bent pipe.

[0017] Beneficial effects of the utility model:

[0018] 1. In the utility model, a sealing plug is used to fill the gap between the widened section of the pipe body and the steel pipe, thereby achieving sealing protection for the connection between the connecting pipe fitting and the steel pipe. Compared with the prior art, it is not only easy to operate, but also convenient for the subsequent maintenance of the connecting pipe fitting.

[0019] 2. In the utility model, the sealing part and the widened section can be sealed by extrusion fitting, and the outer diameter of the sealing part is set to be larger than the inner diameter of the widened section, so that the outer surface of the sealing part fits tightly with the inner surface of the widened section, which helps to improve the sealing effect of the sealing plug.

[0020] 3. In the utility model, the sealing plug and the widened section can be sealed by threaded connection, which simplifies the installation between the sealing plug and the widened section on the one hand, and can provide reliable sealing and connection with strong stability on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0022] Figure 1 It is a structural schematic diagram of the connecting pipe fitting of the utility model;

[0023] Figure 2 It is a front view of the sealing plug in the utility model;

[0024] Figure 3 It is a top view of the sealing plug in the utility model;

[0025] In the figure:

[0026] 1. Pipe body; 11. Pipe opening; 12. Widening section; 2. Sealing plug; 21. Connecting hole; 22. Sealing part; 23. Positioning part; 3. Steel pipe; DETAILED DESCRIPTION

[0027] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0028] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0029] Reference Figures 1 to 3 The utility model provides a connecting pipe fitting, including a pipe body 1, a widened section 12 is arranged at one end of the pipe body 1, the widened section 12 and the pipe body 1 are an integrally formed structure, the widened section 12 and the pipe body 1 are connected to each other, the inner diameter of the widened section 12 is larger than the inner diameter of the pipe body 1, the widened section 12 has a pipe mouth 11, in order to achieve sealing protection of the connection part between the steel pipe 3 and the connecting pipe fitting, a sealing plug 2 for sealing the pipe mouth 11 is inserted on the widened section 12, and at the same time, in order to achieve the installation of the steel pipe 3 and the connecting pipe fitting, a connecting hole 21 communicating with the inside of the pipe body 1 is opened on the sealing plug 2 along its axial direction, that is, the steel pipe 3 can pass through the connecting hole 21 and extend into the pipe body 1, that is, the external thread of the steel pipe 3 cooperates with the internal thread of the pipe body 1, thereby achieving the connection between the steel pipe 3 and the connecting pipe fitting.

[0030] In this embodiment, when installing the connecting pipe fitting and the steel pipe 3, a sealing plug 2 is first set on the widened section 12 of the pipe body 1, and then the steel pipe 3 is controlled to pass through the connecting hole 21 of the sealing plug 2 to be connected to the pipe body 1. At this time, the sealing plug 2 can fill the gap between the widened section 12 and the steel pipe 3. Since the connection between the steel pipe 3 and the pipe body 1 is located inside the widened section 12, the sealing plug 2 can achieve sealing protection for the connection between the steel pipe 3 and the pipe body 1. Compared with the method of using sealing materials to fill the gap between the widened section 12 and the steel pipe 3 in the prior art, the operation is more convenient.

[0031] The sealing plug 2 includes a sealing portion 22 that can be inserted into the pipe mouth 11. The outer surface of the sealing portion 22 is sealed and matched with the inner surface of the widened section 12 to achieve sealing of the pipe mouth 11. Specifically, the sealing portion 22 is configured to be truncated cone-shaped, and the outer surface of the sealing portion 22 matches the shape of the inner surface of the widened section 12. The outer surface diameter of the sealing portion 22 is larger than the inner surface diameter of the widened section 12. When the sealing plug 2 is inserted into the pipe mouth 11, the outer surface of the sealing portion 22 and the inner surface of the widened section 12 are squeezed and matched with each other to form a sealing structure, thereby achieving sealing of the pipe mouth 11.

[0032] Furthermore, the outer surface diameter of the sealing portion 22 gradually decreases along the direction of insertion of the sealing plug 2. Since the outer surface of the sealing portion 22 will continue to contact the inner surface of the widened end during the process of inserting the sealing plug 2 into the pipe mouth 11, the outer surface diameter of the sealing portion 22 gradually decreases during this process, which helps to reduce the friction between the two, thereby reducing the resistance encountered by the sealing plug 2 when inserted into the pipe mouth 11, which helps to simplify the installation process.

[0033] In this embodiment, the sealing portion 22 is made of an elastic material. When the outer surface of the sealing portion 22 contacts the inner surface of the widened section 12, it is easy to undergo elastic deformation. At the same time, since the outer diameter of the sealing portion 22 is larger than the inner diameter of the widened portion 12, the outer surface of the sealing portion 22 can always be in close contact with the inner surface of the widened section 12, which helps to improve the sealing effect.

[0034] At the same time, in order to improve the sealing effect of the sealing plug 2 on the connection between the steel pipe 3 and the pipe body 1, the aperture of the connecting hole 21 gradually becomes smaller in the direction in which the sealing plug 2 is inserted into the pipe mouth 11, that is, the gap between the steel pipe 3 and the sealing plug 2 gradually decreases along this direction, which helps to improve the sealing effect of the sealing plug 2 on the connection between the steel pipe 3 and the pipe body 1.

[0035] In some embodiments, the sealing portion 22 and the widened portion are threadedly sealed. Specifically, the outer surface of the sealing portion 22 has an external thread, and the inner surface of the widened section 12 has an internal thread that matches the external thread of the sealing portion 22, thereby achieving a sealed connection between the sealing portion 22 and the widened section 12. The threaded sealing method simplifies the installation between the sealing plug 2 and the widened section 12 on the one hand, and can provide reliable sealing and connection with strong stability on the other hand.

[0036] Furthermore, in order to facilitate the maintenance of the connecting pipe fittings at a later stage, a positioning portion 23 is provided on the outer surface of the sealing portion 22, and the positioning portion 23 is exposed outside the pipe mouth 11. During the process of inserting the sealing plug 2 into the pipe mouth 11, the positioning portion 23 can abut against the end of the widened section 12, so that the sealing plug 2 cannot be completely inserted into the pipe mouth 11, which facilitates the removal of the sealing plug 2 when the connecting pipe fittings need to be maintained.

[0037] Furthermore, the outer shape of the positioning portion 23 is set to be a regular hexagon, which is convenient for using tools to control the sealing plug 2 and improves the convenience of installation between the sealing plug 2 and the tube body 1.

[0038] In this embodiment, the connecting pipe is one of a straight pipe, a three-way pipe, and a bent pipe.

[0039] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A connecting pipe, comprising a pipe body (1), one end of the pipe body (1) being provided with a widened section (12) communicating with the pipe body (1), the widened section (12) having a pipe opening (11), the inner diameter of the widened section (12) being larger than the inner diameter of the pipe body (1), characterized in that: A sealing plug (2) for sealing the pipe opening (11) is inserted into the widened section (12), and a connecting hole (21) communicating with the pipe body (1) is formed through the sealing plug (2) along its axial direction.

2. A connecting pipe according to claim 1, characterized in that: The sealing plug (2) comprises a sealing portion (22) which is inserted into the pipe opening (11) and seals with the widened section (12).

3. A connecting pipe according to claim 2, characterized in that: The outer diameter of the sealing portion (22) is greater than the inner diameter of the widened section (12), so that the outer surface of the sealing portion (22) fits tightly with the inner surface of the widened section (12).

4. A connecting pipe according to claim 3, characterized in that: The outer diameter of the sealing portion (22) gradually decreases along the direction in which the sealing plug (2) is inserted into the pipe opening (11).

5. A connecting pipe according to claim 4, characterized in that: The sealing portion (22) is made in one piece from an elastic material.

6. A connecting pipe according to claim 2, characterized in that: The sealing portion (22) and the widened section (12) are thread-sealed.

7. A connecting pipe according to claim 1, characterized in that: The diameter of the connection hole (21) gradually decreases along the direction in which the sealing plug (2) is inserted into the pipe opening (11).

8. A connecting pipe according to any one of claims 2 to 6, characterized in that: The outer surface of the sealing portion (22) is sleeved with a positioning portion (23), the positioning portion (23) is located outside the pipe mouth (11), and the positioning portion (23) can abut against the widened section (12) to define the position of the sealing portion (22).

9. A connecting pipe according to claim 8, characterized in that: The positioning portion (23) has an outer shape of a regular hexagon.

10. A connecting pipe according to claim 1, characterized in that: The connecting pipe is one of a straight pipe, a three-way pipe and a bent pipe.

Images