Spherical contact type movable joint

Abstract

The utility model provides a spherical contact type movable joint, and belongs to the field of high-pressure pipe fitting manufacturing. The connecting device comprises a main body, a joint and a connecting nut, a thread is arranged at one end of the main body, and the joint is clamped in the coupling nut; the coupling nut is connected with the thread, so that the joint is connected with the main body; a spherical plug is arranged at one end, facing the main body, of the joint, and an arc-shaped groove is formed in the main body; a sealing gasket is arranged in the groove; and the spherical plug is in contact with the groove through the sealing gasket. According to the utility model, the joint and the main body are directly designed to be in spherical contact and are sealed by the sealing gasket, so that the sealing effect is good, and leakage caused by vibration can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe manufacturing technology especially relates to a spherical surface contact type union belongs to high pressure pipe manufacturing technical field. BACKGROUND

[0002] Union is a convenient and practical pipeline connecting piece. The present market is mainly applied to water supply and drainage system, and common plastic union pipe is provided with radial seal, the structure of this type of union is simple, convenient to disassemble and assemble, and has strong applicability, but the union has the defects of unstable anti-leakage performance, and the extrusion and torsion of the union body to the sealing ring during installation can easily cause the sealing ring to be damaged and fail prematurely.

[0003] In high pressure pipeline system, the sealing performance and stability are higher, especially in high pressure air pipeline. Because the pipelines on both sides cannot be coaxial during installation, and in order to maximize the sealing performance, a large thread pretightening force is required from the outside, which can cause the sealing ring to be subjected to a large extrusion force, and the overall anti-damage capacity of the union is reduced, and the gas leakage is easily caused by vibration and other external factors.

[0004] Therefore, there is an urgent need in the prior art for a union for high pressure air that can resist vibration and has high stability and strong sealing performance. SUMMARY

[0005] The utility model provides a new spherical surface contact type union, which is provided with a sealing gasket on two spherical contact surfaces, so as to enhance the sealing performance and anti-vibration effect, thereby solving the technical problem that the union in the prior art is prone to leakage under vibration.

[0006] The spherical surface contact type union of the utility model comprises a body, a joint and a connecting nut, one end of the body is provided with a thread, the joint is clamped in the connecting nut, the connecting nut is connected with the thread, so that the joint is connected with the body,

[0007] One end of the joint towards the body is provided with a spherical plug, the body is provided with an arc-shaped groove, the groove is provided with a sealing gasket, and the spherical plug is in contact with the groove through the sealing gasket.

[0008] The spherical surface contact type union as described above, wherein one end of the joint towards the body is provided with a snap ring, the connecting nut is provided with a limiting ring, one end of the connecting nut is connected with the thread, and the other end is connected with the snap ring through the limiting ring.

[0009] The spherical contact type joint as described above, wherein a disc spring is further sleeved on the spherical plug; one side of the disc spring is in contact with the main body, and the other side is in contact with the joint.

[0010] The spherical contact type joint as described above, wherein one side of the sealing gasket is a conical surface, and the other side is a circular-arc convex surface; the convex surface is in contact with the groove, and the conical surface is in contact with the spherical plug.

[0011] The spherical contact type joint as described above, wherein the circular-arc shape of the end of the spherical plug is the same as the circular-arc shape of the groove.

[0012] The spherical contact type joint as described above, wherein the sealing gasket is a rubber sealing ring.

[0013] The spherical contact type joint as described above, wherein a through hole is arranged in the joint, and the spherical plug is located at one end of the through hole; the cross section of the spherical plug is in a circular-arc shape.

[0014] The spherical contact type joint as described above, wherein a connecting hole is arranged in the main body, and the connecting hole corresponds to the through hole; the groove is located at the edge of the connecting hole.

[0015] In the embodiment of the present application, the joint and the main body are directly designed to be in spherical contact, and the sealing gasket is used to seal the two, which not only has good sealing effect, but also can effectively avoid leakage caused by vibration. Even if the joint and the main body directly have axial deflection displacement, the sealing effect of the two can be effectively ensured; at the same time, due to the spherical contact, the wear of the two is effectively reduced, and the service life of the high-pressure pipeline is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural diagram of a spherical contact type joint according to an embodiment of the present application;

[0017] Figure 2 FIG. 2 is a side sectional view of the spherical contact type joint according to the embodiment of the present application. DETAILED DESCRIPTION

[0018] The spherical contact type joint can be made of the following materials and components, and is not limited to the following materials and components, for example: a sealing gasket, a threaded joint, a disc spring, a connecting hole, etc.

[0019] As shown in FIG. 1, which is a structural diagram of a spherical contact type joint according to an embodiment of the present application; and Figure 1 FIG. 2 is a side sectional view of the spherical contact type joint according to the embodiment of the present application. Figure 2 .

[0020] The spherical contact type joint of the embodiment comprises a main body 2, a joint 1 and a connecting nut 3, one end of the main body 2 is provided with a thread, the joint 1 is clamped in the connecting nut 3, the connecting nut 3 is connected with the thread to connect the joint 1 with the main body 2, and the joint 1 is pressed on the main body 2 by screwing the connecting nut 3.

[0021] One end of the joint 1 towards the main body 2 is provided with a spherical plug 15, the main body 2 is provided with a circular-arc groove, the groove is provided with a sealing gasket 5, and the spherical plug 15 is in contact with the groove through the sealing gasket 5. Generally, the sealing gasket 5 is a rubber sealing ring.

[0022] In the embodiment of the utility model, the joint and the main body are directly designed as spherical contact, and the sealing gasket is used to seal the two, which not only has good sealing effect, but also can effectively avoid leakage caused by vibration. Even if the joint and the main body directly have axial deflection displacement, the sealing effect of the two can be effectively ensured, and the wear of the two is effectively reduced, and the service life of the high-pressure pipeline is improved.

[0023] The spherical contact is suitable for high-sealing industrial pipeline systems due to good sealing performance and convenient disassembly and assembly. The sealing gasket is installed on the spherical contact, the good elasticity and adaptability of the sealing gasket are used, the sealing gasket is suitable for various pipeline connections, plays the role of shock absorption and noise reduction, and can adapt to certain temperature and pressure changes. The application of the spherical contact not only reduces the wear, but also prolongs the sealing life.

[0024] Generally, one end of the joint 1 towards the main body 2 is provided with a clamping ring 10, the connecting nut 3 is provided with a limiting block ring 31, one end of the connecting nut 3 is connected with the thread, the other end is connected with the clamping ring 10 through the limiting block ring 31, and the joint 1 is pressed on the main body 2 by screwing the connecting nut 3.

[0025] Further, the spherical plug 15 is further sleeved with a disc spring 4, one side of the disc spring 4 is in contact with the main body 2, and the other side is in contact with the joint 1.

[0026] The joint 1 and the main body 2 are close to each other and extrude the disc spring 4 by screwing the connecting nut 3, the disc spring 4 is pressed and obtains a certain pre-tightening force, even if the two sides of the joint are vibrated in the actual use process, the disc spring can effectively absorb the vibration, and the disc spring can effectively protect the sealing gasket 5 and avoid damage of the sealing gasket caused by excessive compression.

[0027] Generally, one side of the sealing gasket 5 is a conical surface, and the other side is a convex arc surface; the convex arc surface is in contact with the groove, and the conical surface is in contact with the spherical plug 15. The contact mode of the convex arc surface and the groove can effectively clamp the sealing gasket, avoid displacement of the sealing gasket during use, and also provide elastic deformation to the maximum extent to absorb vibration during use of the union joint.

[0028] Obviously, the arc shape of the end of the spherical plug 15 is the same as the arc shape of the groove. During actual use, even if the sealing gasket fails, better sealing performance can be provided by the spherical sealing of the two.

[0029] The spherical contact union joint of the embodiment is provided with a through hole in the joint 1, and the spherical plug 15 is located at one end of the through hole; the cross section of the spherical plug 15 is in an arc shape. Meanwhile, the main body 2 is provided with a connecting hole corresponding to the through hole; and the groove is located at the edge of the connecting hole.

[0030] The connecting hole corresponds to the through hole, so as to ensure that the fluid is connected at this position.

[0031] In addition, the spherical contact union joint has the advantages of low manufacturing cost, small size, compact structure, stable product quality, strong anti-vibration performance, non-leakage, easy installation, and application to connection of various high-pressure fluid pipelines.

[0032] The above embodiment numbers of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments. Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be realized by means of some deformation and necessary general technology superposition; of course, some important technical features can also be realized by simplification. Based on such understanding, the technical scheme of the utility model is essentially or says the part that contributes to the prior art, that is, the overall structure and connection mode, and the structure described in each embodiment of the utility model.

[0033] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of each embodiment of the utility model.

Claims

1. A spherical contact expansion joint, characterized by, The utility model provides a connecting device of a main body, a joint and a connecting nut, one end of the main body is provided with a thread, the joint is clamped in the connecting nut, the connecting nut is connected with the thread to connect the joint with the main body, one end of the joint is provided with a spherical plug towards the main body, the main body is provided with a circular-arc groove, the groove is provided with a sealing gasket, the spherical plug is contacted with the groove through the sealing gasket. The joint is provided with a snap ring towards the main body, the connecting nut is provided with a limiting stop ring, one end of the connecting nut is connected with the thread, the other end is connected with the snap ring through the limiting stop ring. The spherical plug is further provided with a disc spring, one side of the disc spring is contacted with the main body, the other side is contacted with the joint.

2. Spherical contact union according to claim 1, characterized in that One side of the sealing gasket is a conical surface, the other side is a circular-arc convex surface, the convex surface is contacted with the groove, the conical surface is contacted with the spherical plug.

3. Spherical contact live joint according to claim 2, characterized in that The circular-arc shape of the spherical plug end is same with the circular-arc shape of the groove.

4. Spherical contact joint according to any of claims 1-3, characterized in that The sealing gasket is a rubber sealing ring.

5. The spherical contact live joint of claim 2, wherein, The joint is provided with a through hole, the spherical plug is located at one end of the through hole, the cross section of the spherical plug is circular-arc shape.

6. Spherical contact joint according to any of claims 1-3, characterized in that The main body is provided with a connecting hole corresponding to the through hole, the groove is located at the edge of the connecting hole.

7. Spherical contact joint according to any of claims 1-3, characterized in that The utility model discloses a connecting device of a main body, a joint and a connecting nut, one end of the main body is provided with a thread, the joint is clamped in the connecting nut, the connecting nut is connected with the thread to connect the joint with the main body, one end of the joint is provided with a spherical plug towards the main body, the main body is provided with a circular-arc groove, the groove is provided with a sealing gasket, the spherical plug is contacted with the groove through the sealing gasket.

8. Spherical contact union according to claim 7, characterized in that ​

Images