CN204420379U - Corrugated pipe connector - Google Patents

Abstract

A bellows joint, comprising: a joint body; a compression nut, the tail of the compression nut has an inner flange, and the compression nut is sleeved on the outer wall of the bellows connection part, and the outer thread of the outer wall of the bellows connection part and the joint body are used Phase fixed; collar, the outer diameter of the collar is smaller than the inner diameter of the compression nut and larger than the inner diameter of the inner flange, the collar is located in the compression nut and against the inner flange, before the compression nut is tightened, the collar The inner diameter is larger than the outer diameter of the bellows, and after the compression nut is tightened, the inner diameter of the collar is smaller than the outer diameter of the bellows; the sealing ring is arranged inside the connecting part of the bellows. Because the bellows joint of the utility model clamps the bellows in the collar, before the compression nut is tightened, the inner diameter of the collar is larger than the outer diameter of the bellows, and after the compression nut is tightened, the inner diameter of the collar is smaller than the outer diameter of the bellows , so that the bellows cannot be pulled out, the firmness is high, and the structure is simple.

Description

Bellows connector

technical field

The utility model relates to a pipe joint technology, in particular to a corrugated pipe joint.

Background technique

The traditional way of connecting liquefied petroleum gas cylinders, gas cylinders, gas stoves and other gas supplies, natural water pipes, sewage pipes and fire-fighting appliances to transport liquids is: connect through rubber tubes and tighten them with lead wires at both ends of the rubber tubes. Anti-dropping; this connection method has many defects: installation and replacement are inconvenient, it is easy to block the air path or water path in the bent state, the rubber tube has poor corrosion resistance, is easy to age, has a short service life, and is prone to air or water leakage .

Chinese patent ZL200510013536.3 discloses a quick connector for corrugated metal hoses. It adopts a corrugated metal hose that has certain flexibility and can be bent at will without breaking. However, it is found through practice that the pipe joint of the above structure needs a sleeve and a compression sleeve, the structure is relatively complicated, and the installation cost is relatively high, so the installation is not very convenient.

Utility model content

The main purpose of the utility model is to provide a corrugated pipe joint with simple structure, firm installation and good sealing performance.

For this reason, the embodiment of the utility model provides a bellows joint, including:

The joint body, the joint body has a longitudinal insertion hole capable of accommodating the insertion of the bellows from the back to the front, the middle part of the joint body has a positioning step, and the tail of the joint body is a bellows connecting part for connecting the bellows , the outer wall of the bellows connection part has external threads;

A compression nut, the tail of the compression nut has an inner flange, and the compression nut is sleeved on the outer wall of the bellows connection part, and is fixed to the joint body by the external thread of the outer wall of the bellows connection part;

Collar, the outer diameter of the collar is smaller than the inner diameter of the compression nut and larger than the inner diameter of the inner flange, the collar is located in the compression nut and against the inner flange, before the compression nut is tightened, the inner diameter of the collar is larger than the corrugated The outer diameter of the pipe, after the compression nut is tightened, the inner diameter of the collar is smaller than the outer diameter of the bellows;

A sealing ring, the sealing ring is arranged inside the connecting part of the bellows, and is against the positioning step of the joint body, when the bellows passes through the compression nut and enters into the connection part of the bellows, the joint is tightened and fixed by the compression nut Body, gland nut and bellows.

Optionally, it also includes: a compression ring, the compression ring is located between the sealing ring and the clip ring, when the compression nut is tightened with the joint body, the sealing ring squeezes the compression ring, and the compression ring compresses the clip lock up.

Optionally, the collar has a notch.

Optionally, the contact surface between the inner flange of the compression nut and the collar is an inclined surface.

Optionally, the sealing ring is an elastic sealing ring.

Optionally, the cross-sectional shape of the sealing ring is shape or L shape.

Optionally, the sealing ring is a tubular sealing ring.

Optionally, after the joint body and the compression nut are tightened, the sealing ring fits into the corrugation of the bellows.

Compared with the prior art, the utility model has at least the following technical effects:

Because the bellows joint of the utility model clamps the bellows in the collar, before the compression nut is tightened, the inner diameter of the collar is larger than the outer diameter of the bellows, and after the compression nut is tightened, the inner diameter of the collar is smaller than the outer diameter of the bellows , so that the bellows cannot be pulled out, the firmness is high, and the structure is simple.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a bellows joint according to an embodiment of the present invention.

Detailed ways

In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can do similar promotions without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below limit.

The embodiment of the utility model first provides a bellows joint, please refer to Figure 1, including:

The joint body 11 has a longitudinal insertion hole capable of accommodating the insertion of the bellows from the rear to the front. The middle part of the joint body 11 has an inward positioning step 18, and the inner diameter of the positioning step 18 is smaller than the seal The outer view of the ring 13 is also smaller than the outer diameter of the bellows 17, so that the bellows 17 and the sealing ring 13 are limited at the tail of the joint body 11, and the tail of the joint body 11 is the bellows connection part 12 for connecting the bellows , the outer wall of the bellows connecting portion 12 has external threads;

Compression nut 16, the tail of the compression nut 16 has an inner flange, and the compression nut 16 is sleeved on the outer wall of the bellows connection part 12, and is fixed to the joint body 11 by using the external thread of the outer wall of the bellows connection part 12, The inner diameter of the inner flange of the compression nut 16 is slightly larger than the outer diameter of the bellows 17, so that the bellows 17 can pass through the compression nut 16 and enter the bellows connecting portion 12;

Collar 15, the outer diameter of collar 15 is smaller than the inner diameter of compression nut 16 and greater than the inner diameter of the inner flange, and the collar 15 is placed in the compression nut 16 and firmly against the inner flange;

A sealing ring 13, the sealing ring 13 is arranged inside the bellows connecting portion 12, and is against the positioning step 18 of the joint body 11, the inner diameter of the sealing ring 13 is slightly larger than the outer diameter of the bellows 17, so that when When the bellows 17 is inserted into the bellows connection part 12, the sealing ring 13 is arranged between the bellows 17 and the bellows connection part 12, which can greatly improve the sealing performance.

Compression ring 14, the compression ring 14 is located between the sealing ring 14 and the collar 15, when the compression nut 16 is tightened with the joint body 11, the sealing ring 14 squeezes the compression ring 14, and the compression ring 14 presses Tighten the collar 15 so that the inner diameter of the collar 15 shrinks, and the collar 15 can be stuck in the inner concave ring of the bellows 17, thereby fixing the bellows 17 so that the bellows 17 is not easy to be pulled out.

In this embodiment, the collar 15 is a ring with a circular cross section, and the contact surface between the inner flange of the compression nut 16 and the collar 15 is an inclined surface. Before the compression nut 16 is tightened, the collar The inner diameter of 15 is larger than the outer diameter of the bellows 17. After the compression nut 16 is tightened, the collar 15 is squeezed by the pressure ring 14, so that the collar 15 can be slightly deformed and shrinks inwardly. The inner diameter of the collar 15 is smaller than that of the bellows 17. The outer diameter, the collar 15 can be stuck in the inner concave ring of the bellows 17 .

In other embodiments, instead of the pressure ring, the sealing ring can be used to squeeze the collar, so that the collar can be slightly deformed and shrunk inward, and the collar can be stuck in the inner concave ring of the bellows.

In other embodiments, the collar has a notch, and the length of the notch is less than 10 mm, so that after the compression nut is tightened, the collar is squeezed, so that the collar shrinks inward, and the inner diameter becomes smaller, so that the collar can Clamps in the inner concave ring of the bellows.

In this embodiment, the sealing ring 13 is an elastic sealing ring, such as a rubber sealing ring, and the rubber sealing ring will be squeezed during the tightening process of the compression nut. Squeeze the collar 15 so that the collar 15 clamps the bellows 17. On the other hand, when the joint body and the compression nut are tightened, the sealing ring 13 is deformed and filled with the bellows 17 and the bellows connecting part 12. The space between them makes the sealing ring 13 also become corrugated, and fits the corrugation of the bellows 17, which can further improve the firmness. The space can greatly improve the airtightness.

In this embodiment, the cross-sectional shape of the sealing ring 13 is shape or L shape. In other embodiments, the sealing ring can also be a tubular sealing ring. When the joint body and the compression nut are tightened, the tubular sealing ring will also deform and fill the gap between the bellows and the bellows connection. space.

Finally, it should be noted that: although the utility model is disclosed as above with preferred embodiments, it is not used to limit the utility model, and any person skilled in the art can make Possible changes and modifications, so the protection scope of the utility model should be defined by the claims of the utility model as the criterion.

Claims (7)

1. a corrugated pipe connector, is characterized in that, comprising:

Joint body, described joint body has one can hold longitudinal jack that bellows inserts from back to front, the middle part of described joint body has positioning step, and the afterbody of described joint body is the bellows joint for connecting bellows, and described bellows joint outer wall has outside thread;

Gland nut, the afterbody of described gland nut has inward flange, and gland nut is set in bellows joint outer wall, utilizes the outside thread of bellows joint outer wall and joint body to fix;

Collar, the external diameter of collar is less than the internal diameter of gland nut and is greater than the internal diameter of inward flange, and described collar is positioned at gland nut and offsets with inward flange, before gland nut is tightened, collar internal diameter is greater than the external diameter of bellows, and after gland nut is tightened, collar internal diameter is less than the external diameter of bellows;

Seal ring, described seal ring is arranged at the inside of bellows joint, and be against the positioning step of described joint body, when being passed into after bellows is by gland nut in bellows joint, utilize gland nut to tighten permanent joint body, gland nut and bellows.

2. corrugated pipe connector as claimed in claim 1, is characterized in that, also comprise: pressure ring, and described pressure ring is between seal ring and collar, and when gland nut is tightened mutually with joint body, described seal ring extruding pressure ring, described pressure ring compresses collar.

3. corrugated pipe connector as claimed in claim 1, it is characterized in that, described collar has breach.

4. corrugated pipe connector as claimed in claim 1, is characterized in that, described gland nut inward flange contacts surface for inclined surface with collar.

5. corrugated pipe connector as claimed in claim 1, it is characterized in that, described seal ring is elastic seal ring.

6. corrugated pipe connector as claimed in claim 1, it is characterized in that, described seal ring is tubular seals circle.

7. corrugated pipe connector as claimed in claim 1, it is characterized in that, after joint body, gland nut are tightened, the ripple of described seal ring and bellows fits.