CN204628883U - A kind of combustion gas Double-seal corrugated pipe joint - Google Patents

Abstract

The utility model relates to a double-seal corrugated pipe joint for gas, comprising a threaded joint fitted on the end of the corrugated pipe, and a locking nut threadedly connected to the threaded joint, the locking nut is fastened on the corrugated pipe, and A sealing ring is provided between the lock nut and the bellows, and a flange is provided in the inner hole of the threaded joint, and the flange presses against the end surface of the bellows; the threaded joint and the bellows There is a sealing ring in between, and the sealing ring is located on the inner side of the flange. The utility model has a double sealing structure, which enhances the sealing performance of the gas quick joint and has a higher use safety level.

Description

A double-seal corrugated pipe joint for gas

technical field

The utility model relates to a double-seal bellows joint for gas.

Background technique

In daily life, gas has become an indispensable energy source for people's life. When using gas, it is necessary to guide the gas to the place of use through a gas pipe to connect to a gas appliance, such as a water heater or a gas stove. During this process, the gas pipe needs to be connected and disassembled. In order to achieve fast operation and ensure the tightness of the gas pipe connection, people have designed some gas joints, which are set on the bellows with threaded joints, and then threaded on the joints through lock nuts to press the joints tightly. On the bellows, a sealing ring is added between the joint or lock nut and the bellows, so that the sealing ring is also pressed to the side wall of the bellows by the lock nut at the same time, so as to improve the sealing performance of the joint connection. Although this kind of connection joint can realize the quick connection of the gas bellows, it can also play a certain sealing role, but because the sealing ring is only located on the side wall of the bellows, and the gas passes through the inner hole of the bellows, the side wall of the bellows itself It has good sealing performance, and the gas can only leak at the port of the bellows. If the contact between the sealing ring and the lock nut, joint or bellows is not tight, the gas may still leak through the sealing ring, so for Leakage, this kind of quick joint must tighten the lock nut very tightly, so that when the lock nut is connected with the joint, it can provide a large compression force on the sealing ring to improve the sealing performance, which will cause the connection operation of the joint to be too laborious Not convenient and fast enough.

Contents of the invention

The purpose of the utility model is to provide a double-seal bellows joint for gas, which can quickly connect the gas bellows and has higher sealing performance.

In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: a double-seal corrugated pipe joint for gas, including a threaded joint sleeved on the end of the bellows, and a lock nut threaded on the threaded joint, the lock The tight nut is tightened on the bellows, and a sealing ring is arranged between the lock nut and the bellows, and it is characterized in that a flange is arranged in the inner hole of the threaded joint, and the flange presses against the bellows. On the end face of the pipe; a sealing ring is provided between the threaded joint and the bellows, and the sealing ring is located inside the flange.

According to the solution above, the upper end of the sealing ring has a flange ring, and the flange ring is located between the flange and the end surface of the bellows and covers the end surface of the bellows.

According to the solution above, the radial length of the flange ring is not less than the radial length of the flange.

According to the above solution, the lower end of the sealing ring has a snap ring, and the lower part of the inner hole of the threaded joint is provided with a ring groove, and the snap ring is snapped into the ring groove.

According to the above solution, a clamping sleeve is also provided between the lock nut and the bellows, the outer side of the upper end of the clamping sleeve has a protruding ring, the lower end of the lock nut has a flange ring, and the flange ring It is clamped under the protruding ring so that the clamping sleeve cannot escape from under the locking nut.

According to the solution above, the outer diameter of the protruding ring matches the inner diameter of the locking nut, so that the locking nut can be pressed against the protruding ring.

According to the solution above, the inner ring of the clamping sleeve has a groove, and the groove engages with the bellows so that the clamping sleeve cannot slide axially along the bellows.

According to the solution above, the groove is located at the back of the protruding ring, so that the groove can be pressed against the bellows when the lock nut is pressed against the protruding ring.

According to the above solution, the clamping sleeve is formed by splicing two semicircular sets.

According to the solution above, the upper end surface of the sealing ring abuts against the threaded joint, and the lower end surface abuts against the clamping sleeve.

In the double-seal corrugated pipe joint for gas of the utility model, a sealing ring is installed between the lock nut and the corrugated pipe. At the same time, a flange is designed in the inner hole of the threaded joint. The sealing ring is installed between the threaded joint and the bellows, and the sealing ring is located on the inner side of the flange, that is, at the port of the bellows, which is equivalent to adding a sealing structure on the basis of the existing gas quick joint, and the sealing structure is located at the The root of the leakage is the port position of the bellows, which not only realizes the function of quickly connecting the gas bellows, but also has higher sealing performance.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a structural sectional view of the utility model.

In the figure: 10, bellows; 20, threaded joint; 30, lock nut; 40, sealing ring; 50, sealing ring; 60, clamping sleeve; 21, flange; 22, ring groove; 31, flange ring ; 51, flange ring; 52, snap ring; 61, convex ring; 62, groove;

Detailed ways

The technical scheme of the present utility model is described below in conjunction with accompanying drawing and embodiment.

As shown in Figure 1 and Figure 2, a double-seal bellows joint for gas according to the utility model includes a threaded joint 20 sleeved on the end of the bellows 10, and a lock nut threaded on the threaded joint 20 30, the lock nut 30 is tightened on the bellows 10, and a sealing ring 40 is provided between the lock nut 30 and the bellows 10, and the feature is that a flange is provided in the inner hole of the threaded joint 20 21, the flange 21 presses against the end surface of the bellows 10; a sealing ring 50 is provided between the threaded joint 20 and the bellows 10, and the sealing ring 50 is located on the flange 21 inside. In the double-seal corrugated pipe joint for gas of the utility model, a sealing ring 40 is installed between the lock nut 30 and the corrugated pipe 10, and at the same time, a flange 21 is designed in the inner hole of the threaded joint 20, and the flange 21 presses against the corrugated pipe. The end face of the pipe 10 is installed on the sealing ring 50 between the threaded joint 20 and the bellows 10, and the sealing ring 50 is located on the inner side of the flange 21, that is, at the port of the bellows 10, which is equivalent to that of the existing gas quick connector. A sealing structure is added on the basis, and the sealing structure is located at the root of the leakage, that is, the port position of the bellows 10, which not only realizes the function of quickly connecting the gas bellows 10, but also has higher sealing performance.

In order to further improve the sealing performance of the sealing ring 50, the upper end of the sealing ring 50 has a flange ring 51, the flange ring 51 is located between the flange 21 and the end surface of the bellows 10, and covers the bellows. On the end face of the pipe 10, preferably, the radial length of the flange ring 51 is not less than the radial length of the flange 21, so that the flange ring 51 of the sealing ring 50 can be pressed against the port of the bellows 10 Above all, the gas is blocked from entering the threaded joint 20 or the inside of the locking nut 30 from the port of the bellows 10, which can provide higher sealing performance. Specifically, the lower end of the seal ring 50 also has a snap ring 52, and the lower part of the inner hole of the threaded joint 20 is provided with a ring groove 22, and the snap ring 52 is clamped in the ring groove 22, so that the seal ring 50 It is positioned in the threaded joint 20 to ensure that the flange ring 51 of the sealing ring 50 is always kept at the port position of the bellows 10, so that the position of the sealing ring 50 will not be accidentally changed during the connection operation to cause gas leakage.

In order to further improve the sealing performance of the seal ring 40, a clamping sleeve 60 is also provided between the lock nut 30 and the bellows 10, and a protruding ring 61 is provided on the outside of the upper end of the clamping sleeve 60. The lock nut 30 The lower end of the lower end has a flange ring 31, and the flange ring 31 is clamped under the protruding ring 61 so that the clamping sleeve 60 cannot escape from under the lock nut 30. Preferably, the protruding ring 61 The outer diameter matches the inner diameter of the locking nut 30, so that the locking nut 30 can be pressed against the protruding ring 61, furthermore, the inner ring of the clamping sleeve 60 has a groove 62, The groove 62 is engaged on the bellows 10, specifically, the groove is engaged at the peak position of the bellows 10, so that the clamping sleeve 60 cannot slide axially along the bellows 10, and the The groove 62 is located at the back of the protruding ring 61 , so that the groove 62 can be pressed against the bellows 10 when the locking nut 30 is pressed against the protruding ring 61 . Through the clamping sleeve 60, the lock nut 30 can be more closely connected with the bellows 10, and will not slide along the axial direction of the bellows 10, and can provide better pressing force on the sealing ring 40, so that the sealing ring 40 and the bellows 10 And the contact between the locking nut 30 is tighter, effectively preventing gas leakage. In addition, for the convenience of installation, the clamping sleeve 60 is spliced by two semicircular sets, and the two halves of the sets are respectively put into the locking nut 30 during installation.

Finally, for the axial length of the sealing ring 40, it is better to make the upper end surface of the sealing ring 40 abut against the threaded joint 20, and the lower end surface abut against the clamping sleeve 60, which can also improve the sealing performance. .

The utility model enhances the sealing performance of the gas quick connector through the double sealing structure of the sealing ring 40 and the sealing ring 50, and has a higher use safety level.

Claims (10)

1. A double-seal bellows joint for gas, comprising a threaded joint (20) sleeved on the end of the bellows (10), and a lock nut (30) threaded on the threaded joint (20), the lock The tight nut (30) is tightened on the bellows (10), and a sealing ring (40) is arranged between the lock nut (30) and the bellows (10), and it is characterized in that the threaded joint (20) A flange (21) is provided in the inner hole, and the flange (21) presses against the end face of the bellows (10); There is a sealing ring (50) and said sealing ring (50) is located inside said flange (21). 2. The double-seal corrugated pipe joint for gas according to claim 1, characterized in that, the upper end of the sealing ring (50) has a flange ring (51), and the flange ring (51) is located on the protrusion Between the edge (21) and the end surface of the bellows (10), and covering the end surface of the bellows (10). 3. The gas double-seal bellows joint according to claim 2, characterized in that the radial length of the flange ring (51) is not less than the radial length of the flange (21). 4. The double-seal corrugated pipe joint for gas according to claim 2, characterized in that, the lower end of the sealing ring (50) has a snap ring (52), and the lower part of the inner hole of the threaded joint (20) is provided with a A ring groove (22), the snap ring (52) is clamped in the ring groove (22). 5. The double-seal bellows joint for gas according to any one of claims 1-4, characterized in that a clamping sleeve (60) is also provided between the lock nut (30) and the bellows (10) , the outer side of the upper end of the clamping sleeve (60) has a protruding ring (61), the lower end of the lock nut (30) has a flange ring (31), and the flange ring (31) is clamped on the The lower part of the protruding ring (61) prevents the clamping sleeve (60) from coming out from under the locking nut (30). 6. The double-seal bellows joint for gas according to claim 5, characterized in that, the outer diameter of the protruding ring (61) matches the inner diameter of the lock nut (30), so that the lock nut (30) A tight nut (30) can be pressed against said collar (61). 7. The double-seal corrugated pipe joint for gas according to claim 6, characterized in that, the inner ring of the clamping sleeve (60) has a groove (62), and the groove (62) is engaged with the on the bellows (10) so that the clamping sleeve (60) cannot slide axially along the bellows (10). 8. The double-seal corrugated pipe joint for gas according to claim 7, characterized in that, the groove (62) is located on the back of the protruding ring (61), so that the lock nut (30) is pressed The groove (62) can be pressed tightly on the bellows (10) when the convex ring (61) is tightened. 9. The double-seal corrugated pipe joint for gas according to claim 5, characterized in that, the clamping sleeve (60) is formed by splicing two semicircular sleeves. 10. The double-seal corrugated pipe joint for gas according to claim 5, characterized in that, the upper end surface of the sealing ring (40) is in contact with the threaded joint (20), and the lower end surface is in contact with the clamping sleeve (60) butt against each other.