Rotary pipe joint used in low-pressure environment

Abstract

The rotary type pipe joint used in the low-pressure environment comprises a cylinder, one end of the cylinder is fixedly connected with a hexagonal shell, the end, away from the hexagonal shell, of the cylinder is in threaded connection with an adjusting bolt, an extrusion plate is installed at one end of the interior of the cylinder, and the extrusion plate is fixedly connected with the hexagonal shell. The adjusting bolt is screwed down after the connecting pipe is connected with a pipeline connected with the connecting pipe, one end of the adjusting bolt extrudes the extrusion plate, the extrusion plate extrudes the sliding gasket through the spring to be attached to one end face of the hexagonal shell, and therefore the connecting pipe is connected with the pipeline connected with the adjusting bolt. Therefore, certain friction force is generated through extrusion force formed by the anti-skid gasket and the inner side of the hexagonal shell, the anti-skid gasket cannot rotate within a certain force bearing range, after the anti-skid gasket moves, the connecting pipe drives the sealing ring to move to be in extrusion fit with the inner side face of the hexagonal shell, and the connecting sealing performance of the connecting pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary pipe joints, in particular to a rotary pipe joint used in a low-pressure environment. Background Art

[0002] The swivel pipe joint is a special pipe connection device. Its main feature is that the connected pipes can rotate relative to each other. The design structure of this joint is compact and it usually adopts flange connection to facilitate effective integration into the customer's equipment. The swivel pipe joint is mainly used to convey various media such as gas, liquid, oil, etc.

[0003] After a general rotary pipe joint is connected to a pipeline, the connection between the joint and the pipeline is in a rotatable state, so that the connected pipeline needs to be fixed separately. If the connected pipeline is not fixed, it is easy to shake and make abnormal noises during practical use and affect the sealing inside the rotary pipe joint. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a rotary pipe joint for use in a low-pressure environment, aiming to solve the problem that after the rotary pipe joint is connected to the pipeline, the connection between the rotary pipe joint and the pipeline is in a rotatable state, which is prone to shaking and making abnormal noises and affecting the sealing inside the rotary pipe joint.

[0006] 2. Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A rotary pipe joint for use in a low-pressure environment comprises a cylindrical tube, characterized in that: one end of the cylindrical tube is fixedly connected to a hexagonal shell, the end of the cylindrical tube away from the hexagonal shell is threadedly connected to an adjusting bolt, an extrusion plate is installed at one end inside the cylindrical tube, a spring is fixedly connected to one side surface of the extrusion plate, an end of the spring away from the extrusion plate is fixedly connected to an anti-slip gasket, and a sealing ring is installed inside the hexagonal shell.

[0009] As a preferred solution of the utility model, a connecting pipe is installed at one end of the adjusting bolt, and a through hole with an aperture size the same as the cross-sectional diameter length of the connecting pipe is opened between the two ends of the adjusting bolt, and one end of the connecting pipe extends through the through hole on the adjusting bolt to the interior of the cylindrical tube.

[0010] As a preferred solution of the utility model, the end of the hexagonal shell away from the cylindrical tube is connected to a docking thread head, the hexagonal shell, the cylindrical tube and the docking thread head are an integrated molding structure, the interiors of the hexagonal shell, the cylindrical tube and the docking thread head are interconnected, and the docking thread head is conical in shape.

[0011] As a preferred solution of the utility model, a circular hole groove is opened between the two side surfaces of the extrusion plate, and the extrusion plate is installed on the outer ring surface of the connecting tube located inside the cylindrical tube through the circular hole groove. The outer ring surface of the extrusion plate fits with the inner wall of the cylindrical tube and can slide linearly inside the cylindrical tube.

[0012] As a preferred solution of the utility model, the inner side of the spring is sleeved and installed on the outer ring surface of the connecting tube located inside the cylindrical tube, and the anti-slip washer is fixedly sleeved on the outer ring surface of the connecting tube passing through the inside of the spring, and one end of the spring and one end of the anti-slip washer are fixedly connected.

[0013] As a preferred solution of the utility model, the outer ring surface of the sealing ring is in contact with the inner side surface of the hexagonal shell and can slide, the thickness of the sealing ring is smaller than the internal length of the hexagonal shell, one end of the connecting pipe extends to the interior of the sealing ring after passing through the anti-slip gasket, and one end of the connecting pipe is connected to a side opening of the sealing ring, and the sealing ring and the connecting pipe are fixedly and sealed.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model tightens the adjusting bolt after the connecting pipe is connected to the connected pipeline, so that one end of the adjusting bolt presses the pressing plate, and the pressing plate presses the sliding washer to fit on one end surface of the hexagonal shell through the spring, so that a certain friction force is generated by the pressing force formed between the anti-slip washer and the inner side of the hexagonal shell, and the anti-slip washer will not rotate within a certain bearing force range, and after the anti-slip washer moves, the connecting pipe drives the sealing ring to move and press and fit with the inner side surface of the hexagonal shell, thereby ensuring the connection sealing of the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a rotary pipe joint used in a low-pressure environment according to the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of a cylindrical tube and a hexagonal shell used in a low-pressure environment of the utility model;

[0019] Figure 3The utility model is a schematic diagram of the internal structure of a rotating cylindrical tube and a hexagonal shell used in a low-pressure environment.

[0020] In the figure: 1. cylindrical tube; 2. hexagonal shell; 3. adjusting bolt; 4. connecting pipe; 5. butt thread head; 6. extrusion plate; 7. spring; 8. anti-slip gasket; 9. sealing ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Example:

[0023] See also Figure 1-3 The present embodiment provides a rotary pipe joint for use in a low-pressure environment, comprising a cylindrical barrel 1, one end of the cylindrical barrel 1 is fixedly connected to a hexagonal shell 2, an end of the cylindrical barrel 1 away from the hexagonal shell 2 is threadedly connected to an adjusting bolt 3, an inner end of the cylindrical barrel 1 is installed with an extrusion plate 6, a side surface of the extrusion plate 6 is fixedly connected to a spring 7, an end of the spring 7 away from the extrusion plate 6 is fixedly connected to an anti-slip gasket 8, a sealing ring 9 is installed inside the hexagonal shell 2, a connecting pipe 4 is installed at one end of the adjusting bolt 3, a through hole with an aperture size the same as the cross-sectional diameter length of the connecting pipe 4 is opened between the two ends of the adjusting bolt 3, one end of the connecting pipe 4 passes through the through hole on the adjusting bolt 3 and extends to the inside of the cylindrical barrel 1, a circular hole groove is opened between the two side surfaces of the extrusion plate 6, and the extrusion plate 6 is installed in the connecting pipe 4 located inside the cylindrical barrel 1 through the circular hole groove. On the outer ring surface, the outer ring surface of the extrusion plate 6 fits with the inner wall of the cylindrical tube 1 and can slide linearly inside the cylindrical tube 1. The inner side of the spring 7 is sleeved and installed on the outer ring surface of the connecting tube 4 located inside the cylindrical tube 1. The anti-skid washer 8 is fixedly sleeved on the outer ring surface of the connecting tube 4 passing through the inside of the spring 7. One end of the spring 7 and one end of the anti-skid washer 8 are fixedly connected. During the use of the rotary pipe joint, after the adjusting bolt 3 is tightened, the adjusting bolt 3 will push the extrusion plate 6 inward inside the cylindrical tube 1. At this time, the extrusion plate 6 will squeeze the spring 7 and apply a certain pressure. Then, one side of the anti-skid washer 8 will be squeezed with one end surface of the hexagonal shell 2, thereby forming an extrusion force through the anti-skid washer 8 and the inner side of the hexagonal shell 2 to generate a certain friction force, and the anti-skid washer 8 will not rotate within a certain bearing force range.

[0024] In this embodiment, if Figure 1 and Figure 2As shown, one end of the hexagonal shell 2 away from the cylindrical tube 1 is connected with a docking thread head 5, the hexagonal shell 2, the cylindrical tube 1 and the docking thread head 5 are an integrally formed structure, the interiors of the hexagonal shell 2, the cylindrical tube 1 and the docking thread head 5 are interconnected, the docking thread head 5 is conical in shape, and after the pipeline for supplying the medium is threadedly connected to the docking thread head 5, the conveying medium can enter the interior of the hexagonal shell 2, and the docking thread head 5 is a fixed connection, which will not be affected by the rotation of the rotary pipe joint, thereby ensuring the connection sealing of the pipeline for supplying the medium.

[0025] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the outer ring surface of the sealing ring 9 is in contact with the inner side surface of the hexagonal shell 2 and can slide. The thickness of the sealing ring 9 is smaller than the internal length of the hexagonal shell 2. One end of the connecting pipe 4 passes through the anti-slip gasket 8 and extends to the inside of the sealing ring 9. One end of the connecting pipe 4 is connected to a side opening of the sealing ring 9. The sealing ring 9 and the connecting pipe 4 are fixedly and sealedly connected. When the anti-slip gasket 8 is squeezed by the spring 7 and moves toward the direction of the hexagonal shell 2, the connecting pipe 4 is fixedly connected to the anti-slip gasket 8, so the connection 4 will also move. And because the sealing ring 9 and the connecting pipe 4 are fixedly and sealed, the sealing ring 9 will be squeezed between the inner side surface of the hexagonal shell 2, so that the conveying medium enters the connecting pipe 4 after entering the docking threaded head 5, and the connection sealing of the connecting pipe 4 is guaranteed by the sealing ring 9.

[0026] Working principle: When the rotary pipe joint is in use, one end of the butt thread head 5 is tightened and connected with one end of the medium supply pipeline, and one end of the connecting pipe 4 is connected with the connected pipeline. At this time, after adjusting the rotation angle of the connecting pipe 4, tighten the adjusting bolt 3. After the adjusting bolt 3 is tightened, the adjusting bolt 3 will push the extrusion plate 6 inward inside the cylindrical tube 1. At this time, the extrusion plate 6 will squeeze the spring 7 and apply a certain pressure. Then, one side of the anti-skid washer 8 will be squeezed with one end face of the hexagonal shell 2, thereby forming a friction between the anti-skid washer 8 and the inner side of the hexagonal shell 2. The squeezing force generates a certain friction force, and the anti-skid washer 8 will not rotate within a certain range of bearing force. When the anti-skid washer 8 is squeezed by the spring 7 and moves in the direction of the hexagonal housing 2, the connecting pipe 4 is fixedly connected to the anti-skid washer 8, so the connecting pipe 4 will also move. Moreover, since the sealing ring (9) and the connecting pipe (4) are fixedly and sealedly connected, the sealing ring 9 will be squeezed between the inner side surface of the hexagonal housing 2, so that the conveying medium enters the connecting pipe 4 after entering the connecting thread head 5, and the sealing ring 9 ensures the connection sealing of the connecting pipe 4.

[0027] All technical features in this embodiment can be freely combined according to actual needs.

[0028] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A rotary pipe joint for use in a low-pressure environment, comprising a cylindrical barrel (1), characterized in that: One end of the cylindrical tube (1) is fixedly connected to a hexagonal shell (2), an end of the cylindrical tube (1) away from the hexagonal shell (2) is threadedly connected to an adjusting bolt (3), an inner end of the cylindrical tube (1) is installed with an extrusion plate (6), a side surface of the extrusion plate (6) is fixedly connected to a spring (7), an end of the spring (7) away from the extrusion plate (6) is fixedly connected to an anti-slip gasket (8), and a sealing ring (9) is installed inside the hexagonal shell (2); A connecting pipe (4) is installed at one end of the adjusting bolt (3); a through hole having a hole diameter and a length equal to the cross-sectional diameter of the connecting pipe (4) is provided between the two ends of the adjusting bolt (3); and one end of the connecting pipe (4) passes through the through hole on the adjusting bolt (3) and extends to the interior of the cylindrical tube (1); The outer ring surface of the sealing ring (9) is in contact with the inner side surface of the hexagonal shell (2) and can slide thereon; the thickness of the sealing ring (9) is smaller than the inner length of the hexagonal shell (2); one end of the connecting pipe (4) passes through the anti-slip gasket (8) and extends into the interior of the sealing ring (9); one end of the connecting pipe (4) is in communication with an opening on a side surface of the sealing ring (9); and the sealing ring (9) and the connecting pipe (4) are fixedly and sealedly connected.

2. A rotary pipe joint for use in a low-pressure environment according to claim 1, characterized in that: One end of the hexagonal shell (2) away from the cylindrical tube (1) is connected to a butt-thread head (5); the hexagonal shell (2), the cylindrical tube (1) and the butt-thread head (5) are an integrally formed structure; the interiors of the hexagonal shell (2), the cylindrical tube (1) and the butt-thread head (5) are interconnected; and the butt-thread head (5) is in a conical shape.

3. A rotary pipe joint for use in a low-pressure environment according to claim 1, characterized in that: A circular hole groove is provided between the two side surfaces of the extrusion plate (6), and the extrusion plate (6) is mounted on the outer ring surface of the connecting pipe (4) located inside the cylindrical barrel (1) through the circular hole groove. The outer ring surface of the extrusion plate (6) fits with the inner wall of the cylindrical barrel (1) and can slide linearly inside the cylindrical barrel (1).

4. A rotary pipe joint for use in a low-pressure environment according to claim 3, characterized in that: The inner side of the spring (7) is sleeved and mounted on the outer annular surface of the connecting tube (4) located inside the cylindrical tube (1); the anti-skid washer (8) is fixedly sleeved on the outer annular surface of the connecting tube (4) passing through the inside of the spring (7); one end of the spring (7) is fixedly connected to one end of the anti-skid washer (8).

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