Saddle-shaped pipe fitting structure

Abstract

The utility model provides a saddle-shaped pipe fitting structure, and belongs to the technical field of saddle-shaped pipe fittings. The technical problem that an existing saddle-shaped pipe fitting joint is not convenient enough in butt joint operation is solved. The saddle-shaped pipe fitting structure comprises a saddle-shaped part, a branch pipe is arranged on the saddle-shaped part, an annular blocking shoulder is arranged at the end of the branch pipe, a butt-joint nut capable of freely rotating around the branch pipe is arranged on the periphery of the branch pipe in a sleeving mode, and an annular sealing edge is arranged on the inner edge of the butt-joint nut. And the sealing edge is limited and matched between the saddle-shaped part and the retaining shoulder along the axial direction of the branch pipe. The saddle-shaped pipe fitting is high in structural applicability, and the connecting convenience of the saddle-shaped pipe fitting can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of saddle-shaped pipe fittings and relates to a saddle-shaped pipe fitting structure. Background Art

[0002] During the later use of a water supply and drainage system, it is often necessary to modify or add branch pipes to the original pipeline. The existing technology is to use an ordinary saddle-shaped joint for welding, and then the branch pipe is welded or screwed to the pipeline to be connected.

[0003] The patent with the authorization announcement number CN201823064U discloses an infusion bag fitting with a saddle-shaped pipe body seat and a pull-ring type infusion needle catheter. One end of the infusion needle catheter has a welding ring, and the other port is connected to the hole of the saddle-shaped pipe body seat. The infusion needle catheter, the welding ring, and the saddle-shaped pipe body seat are an integrally formed structure by one-time injection molding; it also includes a pull-ring cover, which is formed by sequentially stacking and connecting a pull cover, a gasket, and a concave gasket ring with a connecting pipe. The concave gasket ring is hermetically connected to the welding ring of the infusion needle catheter.

[0004] For the branch pipe of the above saddle pipe body structure, it needs to be connected to the outer pipe through subsequent welding, and the operation process is cumbersome, and the docking operation is not convenient enough. Summary of the Invention

[0005] Aiming at the above problems existing in the prior art, the utility model provides a saddle-shaped pipe fitting structure. The technical problem to be solved by the utility model is: how to improve the convenience of the branch connection of the saddle-shaped pipe fitting.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A saddle-shaped pipe fitting structure includes a saddle-shaped part. A branch pipe is provided on the saddle-shaped part. It is characterized in that a ring-shaped shoulder is provided at the end of the branch pipe, and a docking nut that can freely rotate around the branch pipe is sleeved outside the branch pipe. An annular sealing edge is provided on the inner edge of the docking nut, and the sealing edge is axially limited and fitted between the saddle-shaped part and the shoulder.

[0008] The saddle-shaped part of the saddle-shaped pipe fitting is in a saddle shape for fitting and welding to the outer periphery of the pipe fitting to be maintained. The branch pipe is used to communicate with the pipe fitting to be maintained after welding; by providing a ring-shaped shoulder at the end of the branch pipe and an annular sealing edge on the inner edge of the docking nut sleeved outside the branch pipe, the sealing edge is limited and fitted between the saddle-shaped part and the shoulder. In this way, when connecting the branch pipe to the outer pipe, only the docking nut needs to be rotated. When the docking nut is tightened with the outer pipe, the sealing edge will be tightly pressed against the shoulder to form a seal to prevent the internal pressure of the pipe from leaking. The whole process does not require rotating the outer pipe, and for the situation where the outer pipe is fixed or the outer pipe is located in a narrow passage and is inconvenient to rotate, the docking can still be conveniently realized, effectively improving the connection convenience of the saddle-shaped pipe fitting.

[0009] In the above saddle-shaped pipe structure, the branch pipe includes a pipe body and a metal embedded pipe with one end embedded in the pipe body, the metal embedded pipe is coaxial with the pipe body and is integrally injection molded, and the shoulder is located at the other end of the metal embedded pipe. In this way, the metal embedded pipe and the butt nut are used as the joint for connecting the outer pipe, and the connection strength is better and more stable, which is conducive to ensuring the connection strength and connection stability.

[0010] In the above saddle-shaped pipe structure, the inner diameter of the pipe body is consistent with the inner diameter of the metal embedded pipe, which is conducive to reducing the additional resistance of the fluid passing through the branch pipe and ensuring smooth fluid transportation.

[0011] In the above-mentioned saddle-shaped pipe fitting structure, the outer circumference of the metal embedded pipe between the shoulder and the end face of the branch pipe has a plurality of positioning planes evenly spaced around the circumference. In this way, when the butt nut is finally tightened, another tool such as a wrench can be used to clamp the metal embedded pipe at the positioning plane to keep the angle position fixed, and then the tightening torque is applied to the butt nut to achieve a more reliable reinforcement effect, avoiding the phenomenon that the metal embedded pipe is stressed and separated from the pipe body.

[0012] In the above-mentioned saddle-shaped pipe structure, the outer circumference of the metal embedded pipe has a plurality of notched grooves arranged at intervals around the circumference, and the bottom surface of the notched grooves is the positioning plane. In this way, when a wrench is matched with the positioning plane, it can be embedded in the notched groove, thereby improving the positioning effect of the clamping tool and also avoiding wear and damage caused by direct contact between the positioning tool and the pipe body.

[0013] In the above-mentioned saddle-shaped pipe fitting structure, the inner diameter of the sealing edge is smaller than the outer diameter of the pipe body, and the axial dimension of the butt nut is larger than the spacing dimension between the shoulder and the end face of the pipe body. In this way, the movement range of the butt nut is kept between the pipe body and the shoulder, which is conducive to preventing the shoulder from leaving the range of the butt nut, thereby avoiding the jamming of the butt nut end face and the shoulder during the butt operation, thereby improving the convenience of operation.

[0014] Compared with the prior art, the advantages of the utility model are as follows:

[0015] When the branch pipe is connected to the outer pipe, the saddle-shaped pipe fitting structure only needs to rotate the butt nut. When the butt nut and the outer pipe are tightened, the sealing edge will be pressed against the shoulder to form a seal to prevent the pressure in the pipe from leaking out. The outer pipe does not need to be rotated during the whole process. Even if the outer pipe is fixed or located in a narrow passage and is inconvenient to rotate, the butt connection can still be achieved conveniently, thereby effectively improving the connection convenience of the saddle-shaped pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of this embodiment.

[0018] Figure 3 It is a schematic diagram of the three-dimensional explosion structure of this embodiment.

[0019] In the figure, 1 is the saddle-shaped part;

[0020] 2 is the branch pipe; 21 is the shoulder; 22 is the pipe body; 23 is the metal insert pipe; 231 is the positioning plane; 232 is the notch groove;

[0021] 3 is the docking nut; 31 is the sealing edge. Specific implementation mode

[0022] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0023] Such as Figures 1-3As shown in the figure, the saddle-shaped pipe fitting structure includes a saddle-shaped portion 1. A branch pipe 2 is provided on the saddle-shaped portion 1. An annular shoulder 21 is provided at the end of the branch pipe 2. A docking nut 3 that can rotate freely around the branch pipe 2 is sleeved outside the branch pipe 2. An annular sealing edge 31 is provided on the inner edge of the docking nut 3. The sealing edge 31 is axially limited and fitted between the saddle-shaped portion 1 and the shoulder 21 along the branch pipe 2. The saddle-shaped portion 1 of the saddle-shaped pipe fitting is saddle-shaped and is used for fitting and welding with the outer periphery of the pipe fitting to be maintained. The branch pipe 2 is used for communicating with the pipe fitting to be maintained after welding. By providing an annular shoulder 21 at the end of the branch pipe 2 and providing a sealing edge 31 on the inner edge of the docking nut 3 sleeved outside the branch pipe 2, the sealing edge 31 is limited and fitted between the saddle-shaped portion 1 and the shoulder 21. In this way, when connecting the branch pipe 2 to the outer pipe, only the docking nut 3 needs to be rotated. When the docking nut 3 is tightened with the outer pipe, the sealing edge 31 will be pressed against the shoulder 21 to form a seal to prevent the internal pressure of the pipe from leaking. The whole process does not require rotating the outer pipe. For the situation where the outer pipe is fixed or the outer pipe is located in a narrow passage and is inconvenient to rotate, the docking can still be conveniently realized, effectively improving the connection convenience of the saddle-shaped pipe fitting. Further, the branch pipe 2 includes a pipe body 22 and a metal insert pipe 23 embedded at one end in the pipe body 22. The metal insert pipe 23 is coaxial with the pipe body 22 and integrally injection-molded. The shoulder 21 is located at the other end of the metal insert pipe 23. In this way, the metal insert pipe 23 and the docking nut 3 are used as the joints for connecting the outer pipe, and their connection strength is better and more stable, which is beneficial to ensuring the connection strength and connection stability. Preferably, the inner diameter dimension of the pipe body 22 is the same as the inner diameter dimension of the metal insert pipe 23. This is beneficial to reducing the additional resistance of the fluid passing through the branch pipe 2 and ensuring smooth fluid transportation. Six circumferentially evenly spaced positioning planes 231 are provided on the outer periphery of the metal insert pipe 23 between the shoulder 21 and the end face of the branch pipe 2. In this way, when finally tightening the docking nut 3, another tool such as a wrench can be clamped at the positioning plane 231 to keep the angular position of the metal insert pipe 23 fixed. Then, applying a tightening torque to the docking nut 3 can more reliably achieve the reinforcement effect and avoid the phenomenon that the metal insert pipe 23 is disengaged from the pipe body 22 due to force. Six circumferentially evenly spaced notch grooves 232 are provided on the outer periphery of the metal insert pipe 23. The bottom surface of the notch groove 232 is the positioning plane 231. In this way, when the wrench cooperates with the positioning plane 231, it can be embedded in the notch groove 232, improving the positioning effect of the clamping tool and also preventing the positioning tool from directly contacting the pipe body 22 and causing wear and damage. The inner diameter dimension of the sealing edge 31 is smaller than the outer diameter dimension of the pipe body 22, and the axial dimension of the docking nut 3 is larger than the spacing dimension between the shoulder 21 and the end face of the pipe body 22. In this way, the moving range of the docking nut 3 is maintained between the pipe body 22 and the shoulder 21, which is beneficial to preventing the shoulder 21 from falling out of the range of the docking nut 3, and further avoiding the jamming caused by the end face of the docking nut 3 abutting against the shoulder 21 during the docking operation and improving the operation convenience.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A saddle pipe structure, comprising a saddle portion (1), wherein the saddle portion (1) has a branch pipe (2), characterized in that: The branch pipe (2) has an annular stop shoulder (21) at the end thereof; a butt nut (3) which can freely rotate around the branch pipe (2) is sleeved on the outer periphery of the branch pipe (2); an annular sealing edge (31) is provided on the inner edge of the butt nut (3); the sealing edge (31) is limitedly engaged between the saddle portion (1) and the stop shoulder (21) along the axial direction of the branch pipe (2); the branch pipe (2) comprises a pipe body (22) and a metal embedded pipe (23) with one end embedded in the pipe body (22); the stop shoulder (21) is located at the other end of the metal embedded pipe (23); and the outer periphery of the metal embedded pipe (23) between the stop shoulder (21) and the end surface of the pipe body (22) has a plurality of positioning planes (231) evenly spaced around the circumference.

2. The saddle pipe structure according to claim 1, characterized in that: The metal embedded tube (23) is coaxial with the tube body (22) and is integrally injection molded.

3. The saddle pipe structure according to claim 2, characterized in that: The inner diameter of the tube body (22) is consistent with the inner diameter of the metal embedded tube (23).

4. The saddle pipe structure according to claim 1, characterized in that: The outer circumference of the metal embedded tube (23) has a plurality of notched grooves (232) arranged at intervals around the circumference, and the bottom surface of the notched grooves (232) is the positioning plane (231).

5. The saddle pipe structure according to claim 2 or 3, characterized in that: The inner diameter of the sealing edge (31) is smaller than the outer diameter of the tube body (22), and the axial dimension of the butt nut (3) is larger than the distance between the shoulder (21) and the end face of the tube body (22).

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