CN208474706U - A quick connector for air tightness test of stainless steel pipe - Google Patents

Abstract

The utility model provides a stainless steel pipe air tightness test quick joint, which comprises a first joint body and a second joint body, the first joint body is cylindrical, one end of the first joint body is provided with an installation groove, and the first joint body is provided with a mounting groove. There is a mounting position on the outer peripheral surface of the other end of the body, an air pressure chamber is arranged at the end of the first joint body, and a test hole is arranged on the first joint body; the second joint body is cylindrical, and one end of the second joint body is provided with a limit ring , the center of the limit ring is provided with an intubation guide groove; the inner side wall of the other end of the second joint body is provided with a connecting thread, the connecting thread is engaged with the external thread, and the second joint body is sequentially sleeved with a sealing ring and a guide plug, The end of the sealing ring collides with the inner side wall of the limit ring to form a seal. After adopting this scheme, the sealing performance is good, and it is convenient for the outer edge of the sealing ring to release the pressure of the compressor in time.

Description

A kind of stainless steel tube air seal test quick coupling

Technical field

The utility model relates to quick coupling device technical field, a kind of stainless steel tube underwater airtightness testing is referred in particular to Sealing device.

Background technique

It needs to carry out underwater air-tight test in stainless steel welded pipe manufacturing field, stainless steel welded pipe production process to come pair Production joint carries out leak detection test.Traditional airtight test machine uses end part seal mode, and both ends sealing ring directly withstands stainless Steel pipe generates the sealing that pretightning force realizes sealing ring and stainless steel tube end face, test pressure 1.5MPa or less.But in recent years, with For stainless steel welded pipe in the gradually application of higher-end businesses, market proposes higher test pressure requirement to high-end stainless steel welded pipe, Test pressure is greater than 2.5MPa.Increase test pressure, takes traditional sealing means, both ends push pipe pressure needs to increase, not only Sealing ring is easily damaged, and the easy bending of tube capacity, and existing most of high pressure underwater airtightness testing machines take pipe end circumferential seal Sealing means.But the circumferential seal apparatus structure used on existing market is complicated, need to add bypass gases and circumferentially press to sealing ring Power, the accuracy of manufacture and higher cost.

Summary of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, provide it is a kind of using the sealing ring specially designed and Connector realizes that sealing ring and pipe outer wall carry out self-locking package, realizes the stainless steel tube air seal test quick coupling of the purpose of sealing.

To achieve the above object, technical solution provided by the utility model are as follows: a kind of stainless steel tube air seal test is quick Connector, it includes the first joint body, the second joint body, and the first joint body is cylindrical, first joint body one end End is equipped with the mounting groove of indent, and the first joint body other end outer peripheral surface is equipped with stair-stepping installation position, sets on installation position There is external screw thread, the first joint body end of installation position one end is equipped with the air-pressure chamber of indent, the first connector sheet of air-pressure chamber side Body is equipped with inside and outside perforative instrument connection, and instrument connection is connect with external testing pipe；Second joint body is cylindrical, the second connector Ontology one end end forms stop collar to central reduction, is equipped with inner small and outside big tubaeform intubation guide groove at stop collar center, Intubation smaller one end of guide groove is connect with the second joint body inner cavity, and larger one end is pipeline insert port；Second joint body is another Inner sidewall is held to be equipped with connection screw thread, connection screw thread is meshed with external screw thread, is successively set with sealing ring in the second joint body With water conservancy diversion plug, sealing ring end and stop collar inside side walls contradict to form sealing；Sealing ring, water conservancy diversion after suit beyond the Great Wall circumferential surface with Filling channel is reserved between second joint body internal chamber wall, between water conservancy diversion plug and the first joint body end of air-pressure chamber one end It is reserved with airflow channel, airflow channel is connect with filling channel；It seals and is equipped with testing tube slot at circle center, at water conservancy diversion plug center Equipped with diversion trench, testing tube slot one end with intubation guide groove connect, the other end is connect with diversion trench one end, the diversion trench other end and Air-pressure chamber connection.

The sealing ring makes to be formed using rubber material.

It is inwardly recessed to form extruding slot in the middle part of the sealing ring outer peripheral surface.

The testing tube slot internal diameter is equal to the internal diameter of intubation smaller one end of guide groove, and is greater than the internal diameter of diversion trench.

Utility model has the advantages that one, using the sealing ring of special designing, pass through Computer Simulation technology mould It is quasi-, the most suitable thickness of design sealing element and outer ring curvature, so that sealing element, when receiving circumferential direction and axial compressive force, deformation is first Occur to guarantee at middle part without there is gauffer or ripple the seamless applying of sealing ring and steel pipe walls.The sealing element form and lip Sealing ring principle is similar, but has bigger contact area compared to lip seal circle, guarantees the repeated disassembled and assembled of stainless steel tube test Sealing performance is still able to maintain having local damage.Two, using the water conservancy diversion plug specially designed, pipe both ends limit had both been can be used as Position is used, while the diversion trench designed is acted on as sealing element air-flow conducting, facilitates the timely pressuring machine pressure release in sealing ring outer.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model.

Specific embodiment

Below with reference to all attached drawings, the utility model is described in further detail, the preferred embodiment of the utility model are as follows: ginseng See attached drawing 1, a kind of stainless steel tube air seal test quick coupling described in the present embodiment includes the first joint body 1, second connects Head ontology 2, the first joint body 1 is cylindrical, and 1 one end end of the first joint body is equipped with the mounting groove of indent, the first connector 1 other end outer peripheral surface of ontology is equipped with stair-stepping installation position, and installation position is equipped with external screw thread, first connector of installation position one end 1 end of ontology is equipped with the air-pressure chamber 3 of indent, and the first joint body 1 of 3 side of air-pressure chamber is equipped with inside and outside perforative instrument connection 4, Instrument connection 4 is connect with external testing pipe；Second joint body 2 is cylindrical, and 2 one end end of the second joint body is to central reduction Stop collar is formed, is equipped with inner small and outside big tubaeform intubation guide groove 5 at stop collar center, intubation smaller one end of guide groove 5 and the The connection of two joint bodies, 2 inner cavity, larger one end are pipeline insert port；Second joint body, 2 other end inner sidewall is equipped with connection Screw thread, connection screw thread are meshed with external screw thread, and sealing ring 6 and water conservancy diversion plug 7, sealing ring 6 are successively set in the second joint body 2 End and stop collar inside side walls contradict to form sealing, and sealing ring 6 makes to be formed using rubber material, in 6 outer peripheral surface of sealing ring Portion is inwardly recessed to form extruding slot；It is pre- between 2 internal chamber wall of sealing ring 6,7 outer peripheral surface of water conservancy diversion plug and the second joint body after suit There are filling channel, airflow channel is reserved between 1 end of the first joint body of 3 one end of water conservancy diversion plug 7 and air-pressure chamber, air-flow is logical Road is connect with filling channel；At 6 center of sealing ring be equipped with testing tube slot 9,9 internal diameter of testing tube slot be equal to intubation guide groove 5 compared with The internal diameter of small one end, and be greater than the internal diameter of diversion trench 8, is equipped with diversion trench 8 at 7 center of water conservancy diversion plug, 9 one end of testing tube slot and inserts Pipe guide groove 5 connects, and the other end is connect with 8 one end of diversion trench, and 8 other end of diversion trench is connect with air-pressure chamber 3.

When it is implemented, stainless steel tube is placed in whole quick coupling, with 7 distance 5mm of water conservancy diversion plug or so.Adjustment first connects The elastic with stainless steel tube of sealing ring 6 is adjusted in head ontology 1 and the second joint body 2, guarantee that stainless steel tube passes in and out freely Sealing ring 3, and cannot loosen very much.When pressurization, a part of gas is entered by 7 interstitial hole of water conservancy diversion plug by developmental tube, a part Gas enters 6 outer ring of sealing ring by water conservancy diversion plug 7.With the addition of gas, into 6 outer ring of sealing ring gas to sealing ring 6 Pressure effect holds sealing ring 6 closely with stainless steel tube to sealing, pressure is bigger, seals.When pressure release, interior gas is managed Body and 6 outer ring gas of sealing ring are discharged from interface simultaneously, and after pressure loses, sealing ring 6 and stainless steel tube pressuring action disappear, real Existing pressure release, stainless steel tube can easily be taken out out of connector.This quick coupling device is due to sealing ring 6 and stainless steel tube contact area It is larger, so that the repeated disassembled and assembled in stainless steel tube test has caused local damage to be also still able to maintain sealing performance.

Advantage of this embodiment is that: one, using the sealing ring of special designing, pass through Computer Simulation technology mould It is quasi-, the most suitable thickness of design sealing element and outer ring curvature, so that sealing element, when receiving circumferential direction and axial compressive force, deformation is first Occur to guarantee at middle part without there is gauffer or ripple the seamless applying of sealing ring and steel pipe walls.The sealing element form and lip Sealing ring principle is similar, but has bigger contact area compared to lip seal circle, guarantees the repeated disassembled and assembled of stainless steel tube test Sealing performance is still able to maintain having local damage.Two, using the water conservancy diversion plug specially designed, pipe both ends limit had both been can be used as Position is used, while the diversion trench designed is acted on as sealing element air-flow conducting, facilitates the timely pressuring machine pressure release in sealing ring outer.

The embodiment of the above is only the preferred embodiment of the utility model, and the reality of the utility model is not limited with this It applies range, therefore all shapes according to the utility model, changes made by principle, should all cover in the protection scope of the utility model It is interior.

Claims (4)

1. A stainless steel tube air tightness test quick joint, which comprises a first joint body (1) and a second joint body (2), characterized in that: the first joint body (1) is cylindrical, and the first joint body (1) is cylindrical. (1) A concave mounting groove is provided at one end of the first joint body. (1) A stepped mounting position is provided on the outer peripheral surface of the other end of the first joint body. (1) A concave air pressure chamber (3) is provided at the end, and the first joint body (1) on one side of the air pressure chamber (3) is provided with a test hole (4) penetrating inside and outside. The test tube is connected; the second joint body (2) is cylindrical, one end of the second joint body (2) shrinks toward the center to form a limit ring, and the center of the limit ring is provided with a trumpet-shaped insert with a small inside and a large outside. The tube guide groove (5), the smaller end of the intubation guide groove (5) is connected with the inner cavity of the second joint body (2), and the larger end is the pipe insertion port; the other end of the second joint body (2) is provided on the inner side wall There is a connecting thread, the connecting thread is engaged with the external thread, a sealing ring (6) and a guide plug (7) are sequentially sleeved in the second joint body (2), and the end of the sealing ring (6) is connected with the inner side wall of the limit ring. Conflict to form a seal; an inflation channel is reserved between the outer peripheral surface of the sealing ring (6), the diversion plug (7) and the inner cavity wall of the second joint body (2), and the diversion plug (7) is connected to the air pressure chamber ( 3) An air flow channel is reserved between the ends of the first joint body (1) at one end, and the air flow channel is connected with the inflation channel; the center of the sealing ring (6) is provided with a test tube slot (9), a guide plug (7) ) is provided with a guide groove (8) in the center, one end of the test tube slot (9) is connected with the intubation guide groove (5), the other end is connected with one end of the guide groove (8), and the other end of the guide groove (8) is connected Connect to the air chamber (3). 2 . The stainless steel tube air tightness test quick joint according to claim 1 , wherein the sealing ring ( 6 ) is made of rubber material. 3 . 3 . The stainless steel tube air tightness test quick joint according to claim 1 , wherein the middle part of the outer peripheral surface of the sealing ring ( 6 ) is recessed inward to form an extrusion groove. 4 . 4. A stainless steel tube air tightness test quick connector according to claim 1, characterized in that: the inner diameter of the test tube slot (9) is equal to the inner diameter of the smaller end of the intubation guide groove (5), and is larger than the guide groove (8) inside diameter.