CN217819202U

CN217819202U - Bellows gas tightness detects auxiliary device

Info

Publication number: CN217819202U
Application number: CN202221995487.8U
Authority: CN
Inventors: 陈规元
Original assignee: Xianfusi Technology Wuhan Co ltd
Current assignee: Xianfusi Technology Wuhan Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-15
Anticipated expiration: 2032-07-27

Abstract

The utility model relates to a bellows gas tightness detection auxiliary device, which comprises a body, a sleeve and a pull rod; the body is hollow and cylindrical and comprises a barrel body, the outer side of the bottom of the barrel body is provided with an outer edge, a pull rod cavity channel is arranged in the barrel body, and a butt joint groove is formed in the inner bottom of the barrel body; the inner diameter of the sleeve is matched with the outer diameter of the barrel body of the body, and the sleeve is sleeved on the outer side of the body; the pull rod comprises a rod body, an air passage is arranged in the rod body, a top cover is fixedly arranged at the top of the rod body, and a joint in butt joint with a cylinder of the leak detector is arranged at the bottom of the rod body; the bottom of the sleeve is provided with a lower sealing ring, the top of the sleeve is provided with an upper sealing ring, and air guide holes matched with each other are formed among the sleeve, the body and the pull rod. The utility model discloses a special structural design, the both ends mouth of pipe that can seal the bellows fast realizes quick, the convenient detection of bellows gas tightness.

Description

Bellows gas tightness detects auxiliary device

Technical Field

The utility model relates to an air tightness check out test set technical field, in particular to bellows gas tightness detects auxiliary device.

Background

The corrugated pipe is a tubular elastic sensitive element which is formed by connecting foldable corrugated sheets along the folding and stretching direction. The corrugated pipe mainly comprises a metal corrugated pipe, a corrugated expansion joint, a corrugated heat exchange pipe, a diaphragm capsule, a metal hose and the like. The metal corrugated pipe is mainly applied to the effects of compensating the thermal deformation of a pipeline, damping, absorbing the settlement deformation of the pipeline and the like, and is widely applied to the industries of petrifaction, instruments, aerospace, chemical industry, electric power, cement, metallurgy and the like.

The air tightness is the core performance of the corrugated pipe, and the leakage rate of the corrugated pipe needs to meet the value of less than or equal to 50ml/min @0.35bar, which is a key index of products. However, in the production process of the corrugated pipe, the pipe wall of the corrugated pipe may be cracked, and the pipe wall may be cracked due to continuous bending during use. These cracks can cause the bellows to leak during use, resulting in a failure of the product. Due to the fact that the corrugated pipe is special in structure and the pipe orifices on the two sides are not easy to seal, the existing detection on the air tightness of the corrugated pipe is difficult, and the quick detection on the air tightness of the corrugated pipe is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to an at least technical problem who exists among the prior art, provide a bellows gas tightness detection auxiliary device, through special structural design, the both ends mouth of pipe that can the quick sealing bellows realizes quick, the convenient detection of bellows gas tightness.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a kind of corrugated pipe air tightness measures the auxiliary device, the said auxiliary device of detection includes the body, bush and tie rod of the size and corrugated pipe looks adaptation; the body is hollow and cylindrical and comprises a barrel body, the outer side of the bottom of the barrel body is provided with an outer edge, a pull rod cavity channel is arranged in the barrel body, and the inner bottom of the barrel body is provided with a butt joint groove for butt joint with a detection seat of a leak detector; the inner diameter of the sleeve is matched with the outer diameter of the barrel body of the body, and the sleeve is sleeved on the outer side of the body; the pull rod comprises a rod body inserted in a pull rod cavity channel, an air channel used for being communicated with a gas circuit system of the leak detector is arranged in the rod body, a top cover with the outer diameter not smaller than the outer diameter of the sleeve is fixedly arranged at the top of the rod body, and a joint butted with a cylinder of the leak detector is arranged at the bottom of the rod body; a lower sealing ring is arranged between the bottom and the outer edge of the sleeve, an upper sealing ring is arranged between the top of the sleeve and the top cover, and air guide holes matched with each other are formed among the sleeve, the body and the pull rod and used for communicating the air passage with the outer side of the sleeve.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the butt joint groove of the body is matched with a detection seat of the leak detector.

Furthermore, the body of rod top fixed mounting of pull rod has a guide cylinder, top cap fixed mounting is at the guide cylinder top, the external diameter of guide cylinder and telescopic internal diameter looks adaptation.

Preferably, the upper sealing ring is sleeved on the guide cylinder.

More preferably, the guide cylinder is further sleeved with an auxiliary sealing ring, and the auxiliary sealing ring is arranged between the upper sealing ring and the top cover.

Further, an internal thread opening is formed in the inner side of the joint.

Preferably, the detection auxiliary device further comprises a screw for connecting the joint with a cylinder of the leak detector.

Furthermore, a sealing ring assembling groove is formed in the rod body and used for installing a stable sealing ring.

The beneficial effects of the utility model are that: the utility model designs the hollow cylindrical body with the outer edge at the bottom, matches the sleeve sleeved outside and the pull rod with the top cover, and arranges the sealing rings at the two ends of the body, so as to extrude the sealing rings and expand the pipe orifice of the sealing corrugated pipe through the pull rod, thereby having good sealing effect and convenient operation; the utility model discloses the structural design of body and pull rod is complete with gas tightness check out test set looks adaptation, can be convenient for with the check out test set assembly to can utilize check out test set's cylinder pulling pull rod, it is good with the check out test set cooperation, it is all very convenient to assemble and use.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a body according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a pull rod according to an embodiment of the present invention;

in the figure: 1. the device comprises a body, 11, an outer edge, 12, a cylinder body, 13, a butt joint groove, 14, a pull rod cavity channel, 2, a sleeve, 3, a pull rod, 31, a rod body, 32, a top cover, 33, a guide cylinder, 34, a joint, 35, an air channel, 36, a sealing ring assembly groove, 4, an upper sealing ring, 5, a lower sealing ring, 6, an auxiliary sealing ring, 7 and a corrugated pipe.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

To facilitate understanding of the structure of the present invention, the present invention is described with reference to fig. 1, which defines the directions of up, down, left, right, front, rear, etc. The directional definitions are merely for convenience of description and to facilitate understanding of the structure of the present invention by those skilled in the art, and do not limit the scope of the present invention.

As shown in fig. 1, the utility model relates to an embodiment designs a bellows gas tightness detects auxiliary device, including body 1, sleeve 2 and the pull rod 3 of the bellows 7 looks adaptation that size and await measuring.

The embodiment is a detection auxiliary device special for a French ATEQ leakage detector.

Body 1 is the cavity tube-shape, including barrel 12, the barrel 12 bottom outside is equipped with outer fringe 11. A pull rod cavity channel 14 is arranged in the cylinder body 12, and a butt joint groove 13 for butt joint with a detection seat of the leak detector is arranged at the inner bottom of the cylinder body 12. The shape of the butt-joint groove 13 of the embodiment can be matched with that of a detection seat of the ATEQ leak detector, so that the butt-joint groove is conveniently butted with the detection seat and is sealed by a sealing ring arranged on the detection seat. The docking slot 13 may also be sized larger than the test socket, which requires a "male" connector configured in the test meter to fit and seal.

The inner diameter of the sleeve 2 is matched with the outer diameter of the cylinder body 12 of the body 1, and the sleeve 2 is sleeved on the outer side of the body 1.

The pull rod 3 comprises a rod body 31 inserted in the pull rod cavity 14, and an air channel 35 communicated with a leak detector air channel system is arranged in the rod body 31. The top of the rod body 31 is fixedly provided with a top cover 32 with the outer diameter not less than the outer diameter of the sleeve 2, and the bottom of the rod body 31 is provided with a joint 34 butted with a cylinder of the leak detector.

A lower sealing ring 5 is arranged between the bottom of the sleeve 2 and the outer edge 11, and an upper sealing ring 4 is arranged between the top of the sleeve 2 and the top cover 32. Air guide holes (not shown in the figure) which are matched with each other are formed among the sleeve 2, the body 1 and the pull rod 3 and are used for communicating the air passage 35 with the outer side of the sleeve 2.

As shown in fig. 1 to 3, when the apparatus is used, the joint 34 of the pull rod 3 is connected and fixed to a cylinder of a leak detector, and then the body 1 is sealingly assembled with a detection base of the leak detector. Because the air vent of the air channel system of the ATEQ leak detector is arranged at the output end of the air cylinder, the air channel connection is not needed in the embodiment. After the above operations are completed, the auxiliary device for detecting the airtightness of the corrugated tube according to this embodiment is assembled with the leak detector. During detection, the corrugated pipe 7 to be detected is sleeved outside the device, and the pipe orifices on two sides are respectively positioned at the upper sealing ring 4 and the lower sealing ring 5. Then the leak detector is started, the cylinder pulls the pull rod 3, the top cover 32 extrudes the upper sealing ring 4 to expand to seal the upper pipe orifice of the corrugated pipe 7, then the sleeve 2 is extruded, and the bottom and the outer edge 11 of the sleeve 2 extrude the lower sealing ring 5 to expand to seal the lower pipe orifice of the corrugated pipe 7. After sealing, the gas circuit system of the leak detector is inflated, and the gas enters the corrugated pipe 7 through the gas passage 35 and the gas guide hole. And finally, the leak detector collects the air tightness data of the corrugated pipe 7 to complete detection, and the whole process is very quick.

In the above embodiment, the present invention can be further modified as follows. In a modified scheme, an internal thread opening is formed in the inner side of the joint 34.

By adopting the improved scheme, the pull rod 3 and the cylinder can be connected in a threaded connection mode, and the assembly is firmer.

In the above-described modification, the present invention can further be modified as follows. In a further development, the test aid also comprises a screw (not shown) for connecting the connection 34 to the cylinder of the leak detector.

Adopt above-mentioned improvement scheme, can be convenient for the assembly of pull rod 3 and cylinder.

In the above embodiment, the present invention can be further modified as follows. In a modified scheme, a sealing ring assembling groove 36 is formed in the rod body 31 and used for installing a stable sealing ring.

Adopt above-mentioned scheme, can make pull rod 3 when the pulling, the operation is more stable, and difficult emergence is shaken, influences sealed effect.

The present invention has another embodiment, which is similar to the first embodiment in structure, except for the improvement of the structure of the pull rod 3.

In this embodiment, a guide cylinder 33 is fixedly mounted on the top of the rod body 31 of the pull rod 3, the top cover 32 is fixedly mounted on the top of the guide cylinder 33, and the outer diameter of the guide cylinder 33 is matched with the inner diameter of the sleeve 2.

Preferably, the upper sealing ring 4 is sleeved on the guide cylinder 33.

The guide cylinder 33 of the present embodiment is sleeved in the sleeve 2, and not only can play a role in guiding and stabilizing the pull rod 3, but also can be used for fixing the upper seal ring 4. Therefore, the upper sealing ring 4 can be assembled more easily, and the upper sealing ring 4 can be limited. The upper seal ring 4 can be prevented from expanding inwards when the pull rod 3 is pulled, resulting in seal failure.

More preferably, an auxiliary sealing ring 6 is further sleeved on the guide cylinder 33, and the auxiliary sealing ring 6 is arranged between the upper sealing ring 4 and the top cover 32.

By adopting the scheme, the sealing failure caused by the fact that the upper sealing ring 4 slides downwards to slide off the upper pipe orifice of the corrugated pipe 7 when the pull rod 3 is pulled can be prevented. When this occurs, the auxiliary seal ring 6 can be used to complete the seal instead of the upper seal ring 4.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The auxiliary device for detecting the air tightness of the corrugated pipe is characterized by comprising a body (1) with the size matched with that of the corrugated pipe (7), a sleeve (2) and a pull rod (3); the body (1) is hollow and cylindrical and comprises a cylinder body (12), the outer side of the bottom of the cylinder body (12) is provided with an outer edge (11), a pull rod cavity channel (14) is arranged in the cylinder body (12), and the bottom of the inner side of the cylinder body (12) is provided with a butt joint groove (13) for butt joint with a detection seat of a leak detector; the inner diameter of the sleeve (2) is matched with the outer diameter of the cylinder body (12) of the body (1), and the sleeve (2) is sleeved on the outer side of the body (1); the pull rod (3) comprises a rod body (31) inserted in the pull rod cavity (14), an air channel (35) communicated with a gas circuit system of the leak detector is arranged in the rod body (31), a top cover (32) with the outer diameter not smaller than that of the sleeve (2) is fixedly installed at the top of the rod body (31), and a joint (34) butted with a cylinder of the leak detector is arranged at the bottom of the rod body (31); be equipped with lower sealing washer (5) between bottom and outer fringe (11) of sleeve (2), be equipped with between the top of sleeve (2) and top cap (32) sealing washer (4), set up the air guide hole of mutual matching between sleeve (2), body (1) and pull rod (3) for switch on air flue (35) and sleeve (2) outside.

2. The auxiliary device for detecting the airtightness of the corrugated tube according to claim 1, wherein: the butt joint groove (13) of the body (1) is matched with a detection seat of the leak detector.

3. The bellows airtightness detection auxiliary apparatus according to claim 1, wherein: the pull rod is characterized in that a guide cylinder (33) is fixedly mounted at the top of a rod body (31) of the pull rod (3), a top cover (32) is fixedly mounted at the top of the guide cylinder (33), and the outer diameter of the guide cylinder (33) is matched with the inner diameter of the sleeve (2).

4. The bellows airtightness detection auxiliary apparatus according to claim 3, wherein: the upper sealing ring (4) is sleeved on the guide cylinder (33).

5. The bellows airtightness detection auxiliary apparatus according to claim 4, wherein: still overlap on guide cylinder (33) and be equipped with auxiliary seal circle (6), auxiliary seal circle (6) set up between last sealing washer (4) and top cap (32).

6. The auxiliary device for detecting the airtightness of the corrugated tube according to claim 1, wherein: an internal thread opening is formed in the inner side of the joint (34).

7. The auxiliary device for detecting the airtightness of the corrugated tube according to claim 6, wherein: the test aid also includes a screw for connecting the fitting (34) to a cylinder of the leak detector.

8. The auxiliary device for detecting the airtightness of the corrugated tube according to claim 1, wherein: and a sealing ring assembling groove (36) is formed in the rod body (31) and used for installing a stable sealing ring.