CN214662788U

CN214662788U - Corrugated pipe connecting joint for gas

Info

Publication number: CN214662788U
Application number: CN202121001803.0U
Authority: CN
Inventors: 陶正年; 陶金宝
Original assignee: Ningbo Hangyong Pipe Industry Co ltd
Current assignee: Ningbo Hangyong Pipe Industry Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-11-09
Anticipated expiration: 2031-05-11

Abstract

The utility model relates to a bellows attach fitting for gas, it includes the attach fitting of being connected with the bellows, the connecting piece of being connected with the attach fitting, the attach fitting inner wall supports the coating of tight sealed waiting to install the bellows, it supports tightly sealedly to wait to install the bellows and peg graft installation joint rear end face and connecting piece terminal surface, the lateral wall of attach fitting is provided with and waits to install the air vent of the coating of bellows and the clearance intercommunication on gas supply layer, attach fitting surface cover is equipped with the sealing ring, there is the inspection hole on the sealing ring, the sealing ring rotates with the attach fitting to be connected with control air vent and inspection hole intercommunication or closure. This application has the effect that can realize the detection to the bellows gas tightness after bellows connection is accomplished, can seal the inspection hole and avoid debris to get into through the inspection hole and wait to install bellows influence bellows normal use when need not to detect the gas tightness simultaneously.

Description

Corrugated pipe connecting joint for gas

Technical Field

The application relates to a gas pipeline, especially relates to a bellows attach fitting for gas.

Background

At present, the application of gas in each field is more and more extensive, and in the in-process of using the gas, often need with gas pipeline connection and dismantlement. Referring to the drawings, a bellows typically has two layers, including an inner gas-supplying layer and an outer clad layer. Application number CN105443889A discloses a bellows quick attach fitting for gas, including the joint, with the nut of connecting threaded connection and the bellows of pegging graft in the nut, still include the snap ring that can stretch out and draw back in radial direction.

The quick installation joint of the corrugated pipe for gas in the related art has no related device for detecting the air tightness of the corrugated pipe, and the air supply layer on the inner layer of the corrugated pipe is difficult to detect if leakage occurs. With respect to the related art in the above, the inventors thought that there was a defect that it was difficult to detect whether the airtightness was good or not.

SUMMERY OF THE UTILITY MODEL

Whether the gas tightness when detecting the bellows installation is good, this application provides a bellows attach fitting for gas.

The application provides a bellows attach fitting for gas adopts following technical scheme:

the utility model provides a bellows attach fitting for gas, includes the attach fitting of being connected with the bellows, with the connecting piece of attach fitting connection, the attach fitting inner wall supports the coating of tight seal waiting to install the bellows, wait to install the bellows and peg graft installation attach fitting rear end face with the connecting piece terminal surface supports tight seal, the lateral wall of attach fitting be provided with the coating of waiting to install the bellows and the air vent of the clearance intercommunication on gas supply layer, attach fitting surface cover is equipped with the sealing ring, there is the inspection hole on the sealing ring, the sealing ring with the attach fitting rotates to be connected with control air vent and inspection hole intercommunication or closure.

By adopting the technical scheme, the corrugated pipe to be installed is inserted into the installation joint for connection, wherein the coating layer of the corrugated pipe to be installed is tightly abutted to the inner wall of the installation joint for sealing, and the air vent communicated with the gap between the coating layer of the corrugated pipe to be installed and the air supply layer is arranged on the installation joint, so that whether the air tightness of the corrugated pipe to be installed is good or not is detected. The setting of sealing ring can make the inspection hole keep closed when need not to detect, thereby impurity such as the greasy dirt gets into the bellows and erodees the bellows of destroying when avoiding normally connecting.

Preferably, a positioning groove is formed in the installation connector, and a sealing ring for abutting against and sealing a coating layer of the to-be-installed corrugated pipe is installed in the positioning groove.

Through adopting above-mentioned technical scheme, installation sealing washer in erection joint supports through the sealing washer and tightly seals the coating of waiting to install the bellows, realizes treating the sealed of installing the bellows coating, guarantees the accuracy that the gas tightness detected.

Preferably, the inner wall of the sealing ring is further provided with a convex ring for abutting and sealing the coating layer of the to-be-installed corrugated pipe.

Through adopting above-mentioned technical scheme, set up the bulge loop in the sealing washer, the bulge loop can produce the deformation of certain degree, adapts to the appearance of the coating of waiting to install the bellows better, promotes the sealed effect of treating the installation bellows.

Preferably, the connecting piece still includes sealed sleeve, sealed sleeve includes location portion and sealing, location portion terminal surface butt in the connecting piece terminal surface, sealing surface butt in the connecting piece inner wall, sealing one end be provided with wait to install the spacing ring of bellows air feed layer terminal surface butt, the air feed layer outer wall of waiting to install the bellows supports closely to seal the sealing inner wall.

By adopting the technical scheme, the sealing sleeve is arranged in the connecting piece, the outer wall of the air supply layer of the bellows to be installed is abutted against the inner wall of the sealing part of the sealing sleeve, the end face of the air supply layer of the bellows to be installed is abutted against the end face of the air supply layer of the bellows to be installed through the limiting ring at one end of the sealing part in a sealing manner, the sealing of the air supply layer of the bellows to be installed is realized, the air tightness of the bellows to be installed can only escape through the detection hole in the middle of the mounting joint and the connecting piece when the air tightness of the bellows to be installed has defects, and the detection accuracy is improved.

Preferably, still include the joint ring of C type form in the erection joint, the lateral wall of joint ring one end includes the inclined plane, be provided with the installation inclined plane in the erection joint, the inclined plane of joint ring with the installation inclined plane butt of erection joint, the terminal surface confession of the other end of joint ring the location portion terminal surface butt of sealing sleeve.

Through adopting above-mentioned technical scheme, set up the joint ring in the erection joint, when the erection joint screws up to the connecting piece, the joint ring atress takes place to deform, and wherein the cross sectional shape of joint ring C type guarantees that it can inwards shrink when taking place to deform to reduce the radius of joint ring, cramp gradually at the outer wall of waiting to install bellows air feed layer, realize treating the fixed of installing the bellows, prevent to wait to install the not hard up of bellows. When the mounting joint is unscrewed and taken out, the clamping ring recovers deformation, so that the corrugated pipe to be mounted can be taken out.

Preferably, still contain the metal gasket between sealed sleeve and joint ring, metal gasket one end and sealed sleeve's location portion terminal surface butt, the other end and joint ring terminal surface butt.

Through adopting above-mentioned technical scheme, be provided with metal gasket between sealing sleeve and joint ring, support the terminal surface and the metal gasket of joint ring tightly, realize the location to the joint ring, guarantee that the joint ring contacts well with sealing sleeve, promote the quality that the gas tightness detected.

Preferably, a stop clamp is further included between the mounting joint and the connecting piece, and the stop clamp is arranged on the outer surface of the connecting piece.

Through adopting above-mentioned technical scheme, set up the locking and press from both sides between erection joint and connecting piece, when not installing the bellows, the setting up of locking clamp makes erection joint and connecting piece just can't screw when being connected to the certain degree, prevents the excessive tightening of erection joint and connecting piece when not installing the bellows, is difficult to separate erection joint and connecting piece when avoiding the bellows installation, can directly take out the locking and press from both sides when needs installation bellows, does not influence the normal installation of bellows.

Preferably, the erection joint contains connecting portion and detection portion, the detection portion is cylindric, the connecting portion surface is regular hexagon, the air vent set up in the detection portion surface, the sealing ring cover is located the detection portion surface.

Through adopting above-mentioned technical scheme, divide into connecting portion and detection portion two parts with the erection joint, connecting portion set up to the convenient operation of screwing up of regular hexagon and place, thereby detection portion sets up to cylindric convenient and connecting piece and treat being connected of installation bellows and be favorable to seting up the air vent and install the sealing ring and realize detecting the function.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the air tightness of the corrugated pipe can be detected after the connection of the corrugated pipe to be installed is finished;

2. can seal the inspection hole and avoid debris to get into through the inspection hole and wait to install the bellows and influence bellows normal use when need not to detect the gas tightness.

Drawings

FIG. 1 is a schematic view of the construction of a field joint, connector and retaining clip.

Fig. 2 is an exploded view of the connection joint and bellows.

FIG. 3 is a schematic view showing a structure in which a vent hole and a detection hole in a connector fitting communicate with each other.

Fig. 4 is a schematic view of the structure in which the vent hole and the detection hole in the connection joint are closed.

Fig. 5 is an exploded view of the connection joint.

FIG. 6 is a cross-sectional view of the connection fitting and bellows

Description of reference numerals: 1. installing a connector; 2. a connecting member; 3. a vent hole; 4. a seal ring; 5. a detection hole; 6. positioning a groove; 7. a seal ring; 8. a convex ring; 9. a sealing sleeve; 10. a positioning part; 11. a sealing part; 12. a limiting ring; 13. a snap ring; 14. a metal gasket; 15. a retaining clip; 16. a connecting portion; 17. a detection unit; 18. a gas supply layer; 19. a coating layer; 20. a retaining ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

Referring to fig. 1 and fig. 2, for a bellows attach fitting for gas that this application embodiment discloses, including the attach fitting 1 of being connected with the bellows, with the connecting piece 2 of attach fitting 1 connection, the lateral wall of attach fitting 1 is provided with air vent 3, and the surface cover of attach fitting 1 is equipped with sealing ring 4 that is used for sealing air vent 3, has seted up inspection hole 5 on sealing ring 4, but inspection hole 5 and air vent 3 intercommunication set up. When the corrugated pipe is installed, the corrugated pipe to be installed is inserted into the installation connector 1 to be connected, wherein a coating layer 19 of the corrugated pipe to be installed is tightly abutted and sealed with the inner wall of the installation connector 1, the corrugated pipe to be installed is inserted through the rear end face of the installation connector 1 to be tightly abutted and sealed with the end face of the connecting piece 2, and the air vent 3 communicated with the gap between the coating layer 19 of the corrugated pipe to be installed and the air supply layer 18 is formed in the installation connector 1, so that whether the air tightness of the corrugated pipe to be installed is good or not is detected. When detecting the gas tightness, rotary seal ring 4 is in order to guarantee inspection hole 5 and air vent 3 intercommunication, thereby rotary seal ring 4 makes inspection hole 5 and air vent 3 closed when detecting the completion, thereby impurity such as greasy dirt gets into the bellows and erodees the damage bellows when the bellows is normally installed.

Referring to fig. 3 and 4, the inner wall of the fitting 1 is a cylinder, and the outer wall can be divided into a connecting portion 16 and a detecting portion 17. In order to facilitate the tightening of the fitting 1 when the corrugated pipe is installed, the outer surface of the connecting portion 16 of the fitting 1 may be polygonal. In the scheme, in order to facilitate process casting and have attractive appearance, the outer surface of the connecting part 16 of the installation connector 1 is designed to be a regular hexagon, and other shapes can be used in the specific implementation process. The outer surface of the detection part 17 is still round to facilitate the opening of the vent hole 3 and the arrangement of the sealing ring 4. The vent hole 3 is arranged on the side wall of the detection part 17 of the mounting joint 1 and is communicated with the gap between the coating layer 19 of the corrugated pipe to be mounted and the air supply layer 18. The outer surface of the detection part 17 of the mounting joint 1 is also sleeved with a sealing ring 4 which is rotatably connected, and the sealing ring 4 is provided with a detection hole 5. The size of inspection hole 5 and set up the position and need satisfy can with the air vent 3 intercommunication of the 17 lateral walls of erection joint 1 detection portion, also need to guarantee that air vent 3 is sealed with inspection hole 5 after sealing ring 4 rotates simultaneously, prevent that impurity such as greasy dirt from getting into the bellows through air vent 3, do not influence the normal use after the bellows installation.

Referring back to fig. 2, the inner wall of the installation joint 1 is provided with a positioning groove 6, and a sealing ring 7 for tightly abutting and sealing the coating layer 19 of the bellows to be installed is installed in the positioning groove 6. In order to optimize the sealing effect, the inner wall of the sealing ring 7 is also provided with a convex ring 8 for abutting and sealing a coating layer 19 of the bellows to be installed. In order to ensure the sealing effect, the sealing ring 7 and the convex ring 8 can be made of rubber with good sealing performance, and can be replaced by other materials with good sealing performance such as silica gel and the like due to process requirements. The inner wall of the connecting part 16 of the installation joint 1 is also provided with threads for threaded connection with the connecting piece 2.

Referring to fig. 5, in order to fix the bellows to be installed and avoid looseness of the bellows to be installed after installation, a clamping ring 13 is further arranged in the installation joint 1. Wherein, the inner wall of erection joint 1 is provided with the installation inclined plane, and the lateral wall of joint ring 13 includes the inclined plane. When the snap ring 13 is mounted, the inclined surface thereof abuts against the mounting inclined surface of the mounting tab 1. The cross-sectional shape of the snap ring 13 is a C-shaped major arc, which can be contracted in the radial direction of the mount joint 1.

When the corrugated pipe is installed, the installation connector 1 is screwed down towards the direction of the connecting piece 2, the clamping ring 13 is stressed to deform and can contract along the radial direction, so that the corrugated pipe to be installed is hooped in the wave trough of the outer wall of the air supply layer 18 of the corrugated pipe to be installed, the corrugated pipe to be installed is fixed, and the corrugated pipe is prevented from loosening after installation is completed. When the corrugated pipe which is installed is dismounted, the installation connector 1 is unscrewed, the clamping ring 13 can recover deformation, the corrugated pipe is not fixed, and the corrugated pipe can be taken out. In this scheme, joint ring 13 adopts the metal material to thereby guarantee that joint ring 13 can buckle along radial direction atress deformation when attach fitting 1 is screwed up to connecting piece 2 and wait to install the bellows, simultaneously when taking off attach fitting 1 unscrew attach fitting 1 after, thus the bellows can be taken out to the joint ring 13 restorable deformation after the shrink. Similarly, the material of the snap ring 13 may be replaced by other materials with better elastic deformation capability.

In order to ensure the sealing of the bellows to be installed, a sealing sleeve 9 is also provided inside the connecting piece 2. The seal sleeve 9 is cylindrical and is divided into a positioning portion 10 and a seal portion 11. Wherein, the one end of location portion 10 of sealing sleeve 9 is with connecting piece 2 terminal surface butt, and the terminal surface butt of the location portion 10 other end and joint ring 13. The outer surface of the sealing portion 11 abuts against the inner wall of the connector 2. In order to improve the sealing effect, one end of the sealing part 11 is further provided with a limit ring 12 which is abutted against the end face of the air supply layer 18 of the corrugated pipe to be installed. When the corrugated pipe is installed, the outer wall of the air supply layer 18 of the corrugated pipe to be installed abuts against and is sealed on the inner wall of the sealing part 11, and the end face of the air supply layer 18 abuts against the limiting ring 12 at one end of the sealing part 11 of the sealing sleeve 9.

Referring to fig. 5, still be provided with metal gasket 14 between sealing sleeve 9 and the joint ring 13, metal gasket 14 one end and the 10 terminal surfaces butts in location portion of sealing sleeve 9, the other end and 13 terminal surfaces butts in joint ring to realize the location to joint ring 13, guarantee that joint ring 13 and sealing sleeve 9 contact well, promote the quality that the gas tightness detected.

Referring to fig. 1 or 6, in order to prevent the installation joint 1 and the connection member 2 from being excessively tightened when the corrugated pipe is not installed and thus it is difficult to separate the installation joint 1 and the connection member 2 when the corrugated pipe needs to be installed, a stop clip 15 is further disposed between the installation joint 1 and the connection member 2, and the stop clip 15 is sleeved on the outer surface of the connection member 2. When the corrugated pipe is not installed, the installation connector 1 and the connecting piece 2 cannot be screwed when being connected to a certain degree due to the arrangement of the stop clamp 15, the excessive screwing of the installation connector 1 and the connecting piece 2 when the corrugated pipe is not installed is prevented, the stop clamp 15 can be directly taken out when the corrugated pipe is required to be installed, the installation connector 1 and the connecting piece 2 can be screwed, and the normal installation of the corrugated pipe is not influenced. In order to facilitate the installation and the taking out of the locking clamp 15, the locking clamp 15 in the scheme is made of plastic materials, and other materials are adopted in the specific implementation process to meet the requirement of easy disassembly.

Referring to fig. 5, the connecting member 2 is still cylindrical overall, wherein the middle portion of the connecting member 2 can be polygonal for convenient placement, and likewise, for convenient process casting and aesthetic appearance, the middle portion of the connecting member 2 is regular hexagon with the same outer surface of the connecting portion 16 of the installation joint 1. Wherein, the connecting piece 2 is internally provided with a positioning ring 20, the end surface of the positioning ring 20 is abutted against the limit ring 12 of the sealing sleeve 9 for fixing the limit ring 12 of the sealing part 11 of the sealing sleeve 9. Corresponding to the erection joint 1, the outer surface of the connection member 2 is provided with threads for screw-coupling with the erection joint 1.

The embodiment of the application discloses a valve gas tightness detection device's implementation principle does: first, the stopper clip 15 is removed, the seal ring 7 is mounted in the positioning groove 6 of the mount joint 1, and the snap ring 13 abuts against the mounting slope of the mount joint 1. The positioning part 10 of the sealing sleeve 9 is abutted against the end face of the connecting piece 2, the sealing part 11 of the sealing sleeve 9 is abutted against the positioning ring in the connecting piece 2, and a metal gasket 14 is arranged between the sealing sleeve 9 and the clamping ring 13. Then, the corrugated pipe to be installed is inserted into the installation joint 1, the convex ring 8 of the sealing ring 7 tightly abuts against and seals the coating layer 19 of the corrugated pipe to be installed, and the end face of the corrugated pipe to be installed, which is inserted into the installation joint 1, tightly abuts against and seals the end face of the limiting ring 12 of the sealing sleeve 9. And then the mounting joint 1 is screwed, so that the clamping ring 13 in the mounting joint 1 is stressed and deformed, and contracts along the radial direction and hoops the air supply layer 18 of the corrugated pipe to be mounted, thereby fixing the corrugated pipe to be mounted.

The completion is treated the installation of installation bellows and the sealed back, rotate sealing ring 4 on the erection joint 1 and make the inspection hole 5 on the sealing ring 4 and the air vent 3 on the erection joint 1 lateral wall keep the intercommunication, thereby whether it is good to judge the gas tightness of bellows through detecting whether there is gaseous effusion on inspection hole 5, rotate sealing ring 4 on the erection joint 1 once more after the detection is accomplished and make inspection hole 5 and air vent 3 closed, avoid impurity such as greasy dirt to invade the bellows and cause the normal use that corrodes the influence bellows.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a bellows attach fitting for gas, includes erection joint (1) of being connected with the bellows, connecting piece (2) of being connected with erection joint (1), its characterized in that: the corrugated pipe installation structure is characterized in that the inner wall of the installation joint (1) supports a coating layer (19) which is tightly sealed and used for installing a corrugated pipe, the rear end face of the installation joint (1) is inserted into the corrugated pipe to be installed, the end face of the connecting piece (2) supports a tight seal, the side wall of the installation joint (1) is provided with a vent hole (3) communicated with the gap between the coating layer (19) and the air supply layer (18) of the corrugated pipe to be installed, the outer surface of the installation joint (1) is sleeved with a sealing ring (4), a detection hole (5) is formed in the sealing ring (4), and the sealing ring (4) is rotatably connected with the installation joint (1) to control the communication or closing of the vent hole (3) and the detection hole (5).

2. A gas bellows connection fitting according to claim 1, characterized in that: a positioning groove (6) is formed in the installing connector (1), and a sealing ring (7) used for abutting against and sealing a coating layer (19) of the corrugated pipe to be installed is installed in the positioning groove (6).

3. A gas bellows connection fitting according to claim 2, characterized in that: the inner wall of the sealing ring (7) is also provided with a convex ring (8) which is used for tightly abutting and sealing a coating layer (19) of the corrugated pipe to be installed.

4. A gas bellows connection fitting according to claim 1, characterized in that: connecting piece (2) still include sealing sleeve (9), sealing sleeve (9) are including location portion (10) and sealing (11), location portion (10) terminal surface butt in connecting piece (2) terminal surface, sealing (11) surface butt in connecting piece (2) inner wall, sealing (11) one end be provided with wait to install spacing ring (12) of bellows gas supply layer (18) terminal surface butt, wait to install the gas supply layer (18) outer wall of bellows and support tightly sealed sealing (11) inner wall.

5. A gas bellows connection joint according to claim 4, wherein: still include joint ring (13) of C type form in erection joint (1), the lateral wall of joint ring (13) one end includes the inclined plane, be provided with the installation inclined plane in erection joint (1), the inclined plane of joint ring (13) with the installation inclined plane butt of erection joint (1), the terminal surface confession of the other end of joint ring (13) location portion (10) terminal surface butt of sealing sleeve (9).

6. A gas bellows connection fitting according to claim 5, wherein: still contain metal gasket (14) between sealing sleeve (9) and joint ring (13), metal gasket (14) one end and location portion (10) terminal surface butt of sealing sleeve (9), the other end and joint ring (13) terminal surface butt.

7. A gas bellows connection fitting according to claim 1, characterized in that: still contain between erection joint (1) and connecting piece (2) stop clamp (15), stop clamp (15) cover is located the connecting piece (2) surface.

8. A gas bellows connection fitting according to claim 1, characterized in that: erection joint (1) contains connecting portion (16) and detection portion (17), detection portion (17) are cylindric, connecting portion (16) surface is regular hexagon, air vent (3) set up in detection portion (17) surface, sealing ring (4) cover is located detection portion (17) surface.