CN215831344U

CN215831344U - Sealing structure

Info

Publication number: CN215831344U
Application number: CN202122437675.0U
Authority: CN
Inventors: 李士鹏; 王青青; 许国望
Original assignee: Zhejiang Yonghe Intelligent Control Technology Co ltd
Current assignee: Zhejiang Yonghe Intelligent Control Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-02-15
Anticipated expiration: 2031-10-09

Abstract

The utility model provides a sealing structure, and belongs to the technical field of machinery. It has solved the problem that is difficult to the orientation after current valve and pipe fitting sealing connection. This seal structure sets up in all being between cylindric connecting portion one and connecting portion two, two outsides in connecting portion have be used for with the external screw thread one of a connecting portion threaded connection, the outside of connecting portion two still has external screw thread two, external screw thread one is more close to the tip of connecting portion two than in external screw thread two, have the interval between external screw thread two and the external screw thread one so that form between the two and be annular seal groove, seal structure including set up in ring type seal and threaded connection in the seal groove be annular locking cap of being of external screw thread two department, locking cap along the external screw thread is to can when connecting portion one is close to the sealing washer sticiss on connecting portion one and/or connecting portion two. This seal structure has convenient directional advantage.

Description

Sealing structure

Technical Field

The utility model belongs to the technical field of machinery, relates to a sealing structure, and particularly relates to a sealing structure between pipe fitting connections.

Background

A pipeline is a device for transporting a gas, liquid or fluid with solid particles, connected by pipes, pipe couplings, valves, etc. Generally, a fluid is pressurized by a blower, a compressor, a pump, a boiler, etc., and then flows from a high pressure portion to a low pressure portion of a pipe, or is transported by the pressure or gravity of the fluid itself. The use of pipelines is very widespread, mainly in water supply, drainage, heating, gas supply, long-distance oil and gas delivery, agricultural irrigation, hydraulic engineering and various industrial installations.

The length of the pipe is limited, and during the long-distance transportation process, the connection among a plurality of pipes is inevitably needed, and the sealing effect after the connection of a plurality of pipes is very important for the pipeline transportation.

The existing pipe fittings are connected by adopting a threaded connection mode more, a sealing ring or a sealing gasket is arranged on the inner side or the outer side of one pipe fitting, and the sealing effect is achieved by extruding the sealing ring by the end part of the pipe fitting through a mode of screwing the two pipe fittings relatively.

However, when the valve and the pipe are connected by a screw thread, the valve and the pipe are relatively screwed and press the sealing ring, the orientation of the valve is often difficult to control, and the situation that the valve is back to a user after connection is very easy to occur, which is not beneficial to operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, provides a sealing structure and solves the problem that the existing valve and pipe fitting are difficult to orient after being connected in a sealing manner.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a seal structure, sets up in all being between cylindric connecting portion one and connecting portion two, two outsides in connecting portion have be used for with the external screw thread one of a connecting portion threaded connection, a serial communication port, the outside of connecting portion two still has external screw thread two, external screw thread one is more close to the tip of connecting portion two than external screw thread two, have the interval so that form between the two and be annular seal groove between two external screw thread one, seal structure including set up in ring type seal and threaded connection in the seal groove be annular locking cap that is of two departments of external screw thread, locking cap along the external screw thread is two can when connecting portion one is close to the sealing washer sticiss on connecting portion one and/or connecting portion two.

When valve and pipe fitting are connected, the link of valve has connecting portion one, the link of pipe fitting has connecting portion two, earlier with locking cap threaded connection in the outer two departments of external screw thread of pipe fitting, and make the position of locking cap keeping away from the seal groove, establish the sealing washer cover in the outer seal groove of pipe fitting again, finally, with the outer two department of external screw thread of connecting portion threaded connection, valve and pipe fitting threaded connection back, the circumferential position of adjustment valve is to the position of convenient operation, afterwards, keep valve and pipe fitting motionless, reverse rotation locking cap, make locking cap remove to a connecting portion direction, the sealing washer sticiss in order to realize sealedly. In the connecting process, after the valve and the pipe fitting are connected and positioned, the sealing is realized by independently depending on the locking cap, the orientation of the valve is ensured when the valve and the pipe fitting are connected in a sealing manner, and the operation is facilitated.

In the sealing structure, one end of the first connecting part facing the locking cap is provided with a conical surface, the diameter of the conical surface is gradually increased from the external thread to the external thread, and the sealing ring can abut against the conical surface. The conical surface on the first connecting part can better position and extrude the sealing ring when the locking cap is close to the first connecting part, so that the sealing performance of connection and the convenience of operation are guaranteed.

In the sealing structure, one end of the locking cap facing the first connecting portion has an annular abutting surface, and the abutting surface can abut against the first connecting portion to form a hard seal. When the sealing washer is sealed, carry out hard seal through leaning on the face, improve sealed effect.

In the sealing structure, the second external thread protrudes out of the outer side surface of the second connecting portion compared with the first external thread. The second external thread is more convex, so that the connection operation of the locking cap can be facilitated.

In the sealing structure, the outer side surface of the sealing ring protrudes out of the first external thread and the second external thread.

In the above sealing structure, the inner side of one end of the locking cap close to the first connecting part is an extruding surface without threads, and the sealing ring can be tightly pressed on the bottom surface of the sealing groove by the extruding surface when the locking cap is close to the first connecting part.

Compared with the prior art, the sealing structure can ensure the connection tightness of the valve and the pipe fitting, and simultaneously, the orientation of the valve direction is facilitated, so that the follow-up operation on the valve is more convenient.

Drawings

FIG. 1 is a schematic cross-sectional view of the present seal arrangement at the time of pipe connection.

In the figure, 1, a connecting part I; 2. a second connecting part; 3. the first external thread; 4. a second external thread; 5. a sealing groove; 6. a seal ring; 7. a locking cap; 8. a conical surface; 9. an abutting surface; 10. and (5) extruding the surface.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the sealing structure is disposed between a first connecting portion 1 and a second connecting portion 2, which are both cylindrical, wherein an external thread two 4 and an external thread one 3 for being in threaded connection with the first connecting portion 1 are disposed on the outer side of the second connecting portion 2, the external thread one 3 is closer to the end of the second connecting portion 2 than the external thread two 4, and a space is provided between the external thread two 4 and the external thread one 3 to form a circular sealing groove 5 therebetween. The sealing structure comprises an annular sealing ring 6 arranged in the sealing groove 5 and a locking cap 7 which is in a circular ring shape and is in threaded connection with the second external thread 4, and the locking cap 7 can tightly press the sealing ring 6 on the first connecting part 1 and/or the second connecting part 2 when being close to the first connecting part 1 along the second external thread 4.

Specifically, one end of the first connecting portion 1 facing the locking cap 7 is provided with a tapered surface 8, the diameter of the tapered surface 8 gradually increases from the first external thread 3 to the second external thread 4, the end of the locking cap 7 facing the first connecting portion 1 is provided with a circular abutting surface 9, the abutting surface 9 can abut against the first connecting portion 1 to form hard seal, the inner side of one end of the locking cap 7 close to the first connecting portion 1 is a smooth cylindrical extruding surface 10 without threads, and when the locking cap 7 is close to the first connecting portion 1 along the second external thread 4 until the abutting surface 9 abuts against the first connecting portion 1, the sealing ring 6 is tightly pressed on the bottom surface of the sealing groove 5, the extruding surface 10 and the tapered surface 8 and tightly abuts against the three to form seal.

For convenience of operation, in the embodiment, the second external thread 4 protrudes from the outer side surface of the second connecting portion 2 than the first external thread 3, and the outer side surface of the sealing ring 6 protrudes from the outer sides of the first external thread 3 and the second external thread 4.

When the valve is connected with the pipe fitting, the case that the connecting end of the valve is provided with the first connecting part 1 and the connecting end of the pipe fitting is provided with the second connecting part 2 is taken as an example for explanation, of course, the two can be exchanged with each other, the locking cap 7 is firstly in threaded connection with the second external thread 4 outside the pipe fitting, the locking cap 7 is far away from the position of the sealing groove 5, and then the sealing ring 6 is sleeved in the sealing groove 5 outside the pipe fitting. And finally, connecting the first connecting part 1 of the valve to the first external thread 3 outside the second connecting part 2 through the internal thread, adjusting the circumferential position of the valve to a position convenient to operate after the valve is in threaded connection with a pipe fitting, and enabling the conical surface 8 to slightly extend into the sealing groove 5.

And then keeping the valve and the pipe fitting still, and reversely rotating the locking cap 7 to enable the locking cap 7 to move towards the first connecting part 1 until the abutting surface 9 abuts against the first connecting part 1. In the screwing process of the locking cap 7, the sealing ring 6 is gradually extruded and deformed towards the bottom surface direction of the sealing groove 5 under the guiding action of the conical surface 8, so that the sealing among the connecting part I1, the connecting part II 2 and the locking cap 7 is better realized.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a sealing structure, sets up in all being between cylindric connecting portion one (1) and connecting portion two (2), connecting portion two (2) outside has the external screw thread one (3) that is used for with connecting portion one (1) threaded connection, a serial communication port, the outside of connecting portion two (2) still has external screw thread two (4), external screw thread one (3) are compared in external screw thread two (4) and are more be close to the tip of connecting portion two (2), have the interval between external screw thread two (4) and the external screw thread one (3) so that form between the two and be annular seal groove (5), sealing structure including set up in ring type seal (6) and threaded connection in seal groove (5) be annular locking cap (7) that are of external screw thread two (4) department, locking cap (7) along external screw thread two (4) to connecting portion one (1) can with when being close to sealing ring (6) sticiss in connecting portion one (1) and (4) with (4) are closed Or on the second connecting part (2).

2. A sealing arrangement according to claim 1, c h a r a c t e r i z e d in that the end of the first connecting part (1) facing the locking cap (7) has a conical surface (8), the diameter of the conical surface (8) increasing from the first external thread (3) to the second external thread (4), and that the sealing ring (6) can abut against the conical surface (8).

3. A sealing arrangement according to claim 1 or 2, characterised in that the end of the locking cap (7) facing the first connecting part (1) has an annular abutment surface (9), which abutment surface (9) can be brought into abutment with the first connecting part (1) to form a hard seal.

4. A sealing arrangement according to claim 1 or 2, characterised in that the second external thread (4) protrudes further from the outer side of the second connection part (2) than the first external thread (3).

5. A sealing arrangement according to claim 1 or 2, characterised in that the outer side of the sealing ring (6) protrudes outside the first (3) and second (4) external thread.

6. A sealing arrangement according to claim 1 or 2, characterized in that the inner side of the end of the locking cap (7) close to the first connecting part (1) is provided with a pressing surface (10) without threads, and when the locking cap (7) is close to the first connecting part (1), the pressing surface (10) can press the sealing ring (6) against the bottom surface of the sealing groove (5).