Solid wall pipe connecting pipe fitting

Abstract

The utility model relates to the field of pipe connecting structures, in particular to a solid wall pipe connecting pipe fitting. The tool comprises a sleeve, a boss part and a connecting part, the boss parts are integrally connected to the inner side of the sleeve, protrude inwards and are arranged side by side in the axial direction of the sleeve, and the inner side faces are in interference fit with the outer circumferential face of the solid wall pipe. And the sleeve is connected with the solid-wall pipe through the connecting part. The connecting pipe is in interference sealing connection with the two solid-wall pipes, the two solid-wall pipes are distributed at intervals, the influence of thermal expansion and cold contraction is eliminated, and the stability of the connecting position and the connecting sealing performance are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection structures, and in particular to a solid-wall pipe connection fitting. Background Technology

[0002] Solid-walled straight pipes are currently widely used in water supply systems, sewage systems, and municipal drainage systems. When laying multiple pipes, connecting structures are needed to connect any two adjacent straight pipes to assemble a complete water pipe system.

[0003] Existing straight pipes can be connected via a sleeve structure. During connection, two straight pipes are inserted into the sleeve from both sides, and the ends of the two straight pipes are aligned and abutted together. A rubber ring is used for sealing. The straight pipes and sleeves are generally made of plastic. During the process of temperature changes in the application environment, the connection between the straight pipes and sleeves is prone to misalignment due to thermal expansion and contraction, resulting in a reduction or even loss of sealing performance. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing a solid-walled pipe connecting fitting that is interference-sealed with two solid-walled pipes. The gap between the two solid-walled pipes is distributed to eliminate the effects of thermal expansion and contraction, and to ensure the stability of the connection position and the sealing performance of the connection.

[0005] The technical solution of this utility model is a solid wall pipe connecting fitting, including a sleeve and a boss portion; the boss portion is integrally connected to the inner side of the sleeve and protrudes inward, with two sets arranged side by side along the axial direction of the sleeve, and the inner side is interference-fitted with the outer circumferential surface of the solid wall pipe.

[0006] Priority is also given to the connecting part, which connects the sleeve to the solid-wall tube.

[0007] Preferably, both ends of the sleeve have flared portions.

[0008] Preferably, the sleeve has multiple through holes.

[0009] Preferably, the connecting part is a convex ring integrally connected to the inner side of the sleeve, and an electrothermal fuse is provided inside the convex ring.

[0010] Preferably, the connecting part is a limiting ring that protrudes outward from the outer periphery of the sleeve, and the limiting ring has a limiting groove that gradually slopes outward from the middle of the sleeve to the outer end.

[0011] Preferably, the inner circumferential surface of the sleeve has an annular groove, which is located between the connecting part and the boss part.

[0012] Preferably, a set of pressure injection holes and pressure holes are provided in the middle of the sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] This utility model uses two sets of protrusions to be connected to two solid-walled tubes with interference seals, and uses rubber rings to improve the sealing effect. The gap between the two solid-walled tubes is distributed to eliminate the influence of thermal expansion and contraction, ensuring the stability of the connection position and the sealing performance of the connection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model connected to two solid-walled tubes;

[0016] Figure 2 for Figure 1 Structural sectional view;

[0017] Figure 3 This is a cross-sectional view of the structure of Embodiment 2 of this utility model, which is connected to two solid-walled tubes.

[0018] Figure 4 This is a cross-sectional view of the structure of Embodiment 3 of this utility model, which is connected to two solid-walled tubes.

[0019] Figure 5 This is a schematic diagram of the structure for installing the buckle.

[0020] Reference numerals: 1. Sleeve; 101. Through hole; 11. Boss part; 12. Protruding ring part; 13. Limiting ring part; 2. Rubber ring; 3. Mounting buckle; 31. Collar part; 32. Connecting hole; 33. Limiting plate part. Detailed Implementation

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown in the figure, the solid wall pipe connection fitting proposed in this embodiment includes a sleeve 1, a boss portion 11, and a connecting portion.

[0023] Both ends of the sleeve 1 have flared ends, which makes it easy to insert two solid-walled tubes into the inside of the sleeve 1 from both sides.

[0024] The boss portion 11 is integrally connected to the inner side of the sleeve 1 and protrudes inward. Two sets are arranged side by side along the axial direction of the sleeve 1, and the inner side is interference-fitted with the outer circumferential surface of the solid wall tube. The boss portion 11 can be a boss with an arc-shaped inner circumferential surface, and multiple boss portions are distributed around the sleeve 1. The boss portion 11 can also be a complete annular structure. Two solid wall tubes extend inward from both sides of the sleeve 1, and are respectively interference-fitted with the two sets of boss portions 11. A gap is left between the two solid wall tubes located inside the sleeve 1, and the two solid wall tubes are sealed together by setting a rubber ring 2. The rubber ring 2 is sleeved on the outer circumference of the solid wall tube and is sealed to the inner wall of the sleeve 1. When the rubber ring 2 is installed, the boss portion 11 is a complete annular structure boss or multiple boss portions distributed in a circle. If the rubber ring 2 is not installed, the boss portion 11 can only be a complete annular structure. The boss portion 11 of the solid wall tube is connected by an annular interference fit for sealing and water tightness. Of course, in actual construction, the rubber ring 2 is always installed.

[0025] The connecting part connects the sleeve 1 to the solid-wall tube. The sleeve 1 has multiple through holes 101. On the one hand, the multiple through holes 101 are provided to reduce the weight of the sleeve 1 and reduce material usage. The multiple through holes 101 are formed on the outer circumferential surface of the sleeve 1 between the installation position of the rubber ring 2 and the end face of the sleeve 1. On the other hand, the multiple through holes 101 are evenly distributed circumferentially on the outer circumferential surface of the sleeve 1 and are arranged in multiple rows. After the solid-wall tube is inserted into the sleeve 1, the worker injects glue into the inside through the through holes 101. The glue spreads on the outer circumference of the solid-wall tube and the inner circumference of the sleeve 1. After solidification, it firmly connects the solid-wall tube and the sleeve 1. If the glue is distributed in a complete annular connection between the solid-wall tube and the sleeve 1, it can further play a sealing role.

[0026] In this embodiment, two sets of protrusions 11 are respectively connected to two solid-walled tubes by interference seal, and the sealing effect is improved by using rubber rings 2. The gap between the two solid-walled tubes is distributed to eliminate the influence of thermal expansion and contraction, and to ensure the stability of the connection position and the connection sealing performance.

[0027] Example 2

[0028] This embodiment presents a solid-walled pipe connection fitting. Compared to Embodiment 1, this embodiment, such as... Figure 3 As shown, the connecting part is a convex ring 12 integrally connected to the inner side of the sleeve 1, and an electric heating wire is provided inside the convex ring 12.

[0029] In this embodiment, instead of using glue injection to connect the sleeve 1 and the solid wall tube, an electrothermal fuse is provided at the convex ring 12. The end of the electrothermal fuse is led out through a wire, and the convex ring 12 is heated by energizing the electrothermal fuse. The convex ring 12 melts and seals between the inner wall of the sleeve 1 and the outer wall of the solid wall tube, thereby connecting the sleeve 1 and the solid wall tube. This further ensures the reliability and sealing of the connection between the sleeve 1 and the solid wall tube.

[0030] Example 3

[0031] This embodiment presents a solid-walled pipe connection fitting. Compared to Embodiment 1, this embodiment, such as... Figure 4 As shown, the connecting part is a limiting ring 13 that protrudes outward from the outer periphery of the sleeve 1. The limiting ring 13 has a limiting groove that gradually slopes outward from the middle to the outer end of the sleeve 1. Figure 5 As shown, two sets of mounting buckles 3 are symmetrically fitted onto the outer circumference of the solid-walled tube. The two sets of mounting buckles 3 form a complete annular structure. Each mounting buckle 3 includes a semi-annular collar portion 31 and multiple limiting plate portions 33 distributed around the collar portion 31. The collar portion 31 and the limiting plate portions 33 are integrally formed, and both ends of the collar portion 31 have connecting holes 32. The two sets of mounting buckles 3 are connected at the connecting holes 32 by bolts and nuts, and are securely fitted onto the outer circumference of the solid-walled tube.

[0032] In this embodiment, the limiting plate portion 33 is inclined. When the solid wall tube is inserted into the sleeve 1, the limiting plate portion 33 of the mounting buckle 3 is pushed inward and deformed by the sleeve. After the solid wall tube is inserted into place, the limiting plate portion 33 rebounds and is stuck in the limiting groove of the limiting ring portion 13. The solid wall tube and the sleeve 1 are connected by the mounting buckle 3.

[0033] Example 4

[0034] This embodiment proposes a solid-wall pipe connection fitting. Compared to embodiments one to three, in this embodiment, the inner circumferential surface of the sleeve 1 has an annular groove, located between the connecting part and the boss part 11. The width of the groove gradually decreases from its opening towards the bottom surface, facilitating the insertion of the rubber ring 2. Alternatively, the groove width can be uniform throughout; in this case, the cross-sectional profile of the groove is an open rectangle, which matches the thickness of the rubber ring 2, allowing for a tighter insertion of the rubber ring 2.

[0035] In this embodiment, a groove is designed on the inner circumferential surface of the sleeve 1 for the rubber ring 2 to be inserted. On the one hand, this can improve the reliability of the sealing connection and prevent the rubber ring 2 from shifting position. On the other hand, it can limit the insertion position of the solid wall tube. After the rubber ring 2 is inserted into the groove, the resistance to the solid wall tube extending further inward increases, indicating that the solid wall tube is now in place. The two solid wall tubes are in a state of gap distribution, which can avoid the effects of thermal expansion and contraction.

[0036] Example 5

[0037] This embodiment proposes a solid-wall pipe connection fitting. Compared to embodiments one to five, in this embodiment, a set of pressure injection holes and pressure holes are provided in the middle of the sleeve 1. Both the pressure injection holes and pressure holes are sealed by default with sealing plugs. When it is necessary to test the sealing performance of this connection fitting, the sealing plugs are removed, the outer ends of the two solid-wall pipes connected by the connection fitting are sealed, the pressure injection holes are connected to an external water injection device or an air injection device, and the pressure holes are connected to an external pressure testing device. Water is injected into the pipe through the water injection device or air is injected into the pipe through the air injection device. After injection, the water pressure or air pressure is tested using the corresponding pressure testing device to test the water tightness of the connection fitting. If the tested pressure value is lower than a preset value, it indicates a leak; if the tested pressure value reaches the preset value, it indicates that the connection fitting is of qualified quality and can achieve effective water tightness sealing. By testing the sealing performance of each individual connection fitting, the water tightness of each connection fitting can be detected, facilitating timely handling and ensuring construction progress, and also facilitating subsequent pipeline maintenance.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A solid-wall pipe connection fitting, characterized in that, include: Sleeve (1); The boss (11) is integrally connected to the inner side of the sleeve (1) and protrudes inward. Two sets are arranged side by side along the axial direction of the sleeve (1), and the inner side is interference-fitted with the outer circumferential surface of the solid wall tube.

2. The solid-wall pipe connection fitting according to claim 1, characterized in that, It also includes a connecting part; which connects the sleeve (1) to the solid wall tube.

3. A solid-wall pipe connection fitting according to claim 1, characterized in that, Both ends of the sleeve (1) have flared sections.

4. A solid-wall pipe connecting fitting according to claim 1, characterized in that, The sleeve (1) has multiple through holes (101).

5. A solid-wall pipe connection fitting according to claim 2, characterized in that, The connecting part is a convex ring (12) integrally connected to the inner side of the sleeve (1), and an electric heating wire is provided inside the convex ring (12).

6. A solid-wall pipe connection fitting according to claim 2, characterized in that, The connecting part is a limiting ring (13) that protrudes outward from the outer periphery of the sleeve (1). The limiting ring (13) has a limiting groove that gradually slopes outward from the middle to the outer end of the sleeve (1).

7. A solid-wall pipe connection fitting according to any one of claims 4-5, characterized in that, The inner circumferential surface of the sleeve (1) has an annular groove, which is located between the connecting part and the boss part (11).

8. A solid-wall pipe connection fitting according to claim 1, characterized in that, A set of pressure injection holes and pressure holes are provided in the middle of the sleeve (1).

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