CN203705128U - Metal bellows assembly air tightness test device - Google Patents

Metal bellows assembly air tightness test device Download PDF

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Publication number
CN203705128U
CN203705128U CN201420035626.1U CN201420035626U CN203705128U CN 203705128 U CN203705128 U CN 203705128U CN 201420035626 U CN201420035626 U CN 201420035626U CN 203705128 U CN203705128 U CN 203705128U
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CN
China
Prior art keywords
flange
metal
pipe components
vertical
metal pipe
Prior art date
Application number
CN201420035626.1U
Other languages
Chinese (zh)
Inventor
张文良
关长江
宋林红
李敏
黄乃宁
王涛
张大林
张秀华
付佳
王雪
Original Assignee
沈阳仪表科学研究院有限公司
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Priority to CN201420035626.1U priority Critical patent/CN203705128U/en
Application granted granted Critical
Publication of CN203705128U publication Critical patent/CN203705128U/en

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Abstract

The utility model provides a metal bellows assembly air tightness test device. The technical points of the device are that a lower flange and an upper flange are respectively arranged at the upper and lower parts of a vertical metal tube, the metal tube and the lower flange are integratedly formed to be an integrated structure, the contact surface of a metal tube outer wall and the upper flange is provided with a sealed ring, a metal bellows assembly is sleeved between the lower flange and the upper flange outside the metal tube, the contact surfaces of the assembly and the lower flange and the upper flange are provided with built-in sealed rings, fastening structures of a screw and a nut are uniformly distributed between the lower flange and upper flange at the inner side of the metal tube and at the outer side of the metal bellows assembly, and the side wall of a vertical metal-tube-shaped is provided with an air inlet tube interface. The metal bellows assembly air tightness test device has the advantages that the effective areas of a metal bellows and a test are reduced, thus blind flange force is greatly reduced, the security is improved, by using the rigidity of the metal bellows, by the elastic deformed sealing of the sealed ring, the sealing effect can be achieved without the axial plastic deformation of the bellows, and the elastic property of the bellows is ensured.

Description

Corrugated metal pipe components tightness test device

Technical field

The utility model relates to the inspection machine in metallic bellows production, specifically a kind of high-temperature hard sealing ball valve corrugated metal pipe components tightness test device.

Background technology

The existing elastic property of metallic bellows has again sealing characteristics, can be applied to high-temperature hard sealing ball valve, realizes the sealing between valve seat and valve body.Solved the hard seal ball valve of general structure in the time of applied at elevated temperature, the hoisting capacity causing because of the high-temperature expansion of material between spheroid and sealing surface of seat is large, the even swollen problem of waiting indefinitely.The high-temperature hard sealing ball valve of applied metal corrugated tube, serviceability temperature can be higher than 250 degrees Celsius, have an enormous advantage compared with soft sealing ball valve, there is the advantages such as high temperature resistant, high pressure resistant, wear-resisting, sealing property is reliable, its open and close torque obviously reduces, greatly extend serviceable life, and operating performance significantly improves, and range of application is more and more wider.

Metal bellows for valves will carry out air pressure air-tight test in the time of factory inspection, is filled with the gas of 0.6MPa pressurized air or the non-flammable cleaning of other non-corrosiveness in bellows component, and pressurize 3min, is positioned in tank and checks by bubble method detection.For common stop valve, gate valve, variable valve metallic bellows, size is suitable with valve rod size, and inside diameter of bel is generally less than 100mm, safer while carrying out air-tight test.And for high-temperature hard sealing ball valve corrugated tube, size is suitable with valve latus rectum, generally be greater than 100mm, even reach 500mm, volume can reach 10 liters, and the blind plate power of formation is up to more than 10 tons, while carrying out air-tight test, the intensity of test unit is proposed to very high request, operating personnel's Personal Safety is also caused to potential threat.

Summary of the invention

The purpose of this utility model is to provide a kind of high-temperature hard sealing ball valve corrugated metal pipe components tightness test device and test method.By rational structural design, reduce the weight of test unit, reduce blind plate power thereby reduce the useful area that test unit and corrugated tube produce, when test, handle easier, safety.

The purpose of this utility model is achieved in that it includes one section of vertical metal tubular body, flange, it is characterized in that: bottom and top at vertical metal tubular body are respectively arranged with a lower flange and upper flange, vertical metal tubular body and the lower flange structure that is welded as a whole is provided with O type rubber seal on the surface of contact of vertical metal tubular body outer wall and upper flange; Between the lower flange of vertical metal tubular body outside and upper flange, be also set with a corrugated metal pipe components, this corrugated metal pipe components and the same seal groove that is provided with built-in rubber O-ring seal in surface of contact place between lower flange and upper flange; The fastening structure that is evenly distributed with screw rod, nut between lower flange outside vertical metal tubular body inner side and corrugated metal pipe components and upper flange also has draft tube interface or screw thread draft tube interface on the sidewall of vertical metal tubular body.

Described vertical metal tubular body is selected Vertical Steel body.

Prevent bellows component in process of the test by supercompression, be also provided with a limited step suitable with corrugated metal pipe components height at screw rod middle part.

The invention has the beneficial effects as follows: the feature one of high-temperature hard sealing ball valve corrugated metal pipe components air pressure tightness test device: be the useful area that reduces corrugated tube and test unit, thereby reduce greatly blind plate power, improved the security of test unit; Feature two is to utilize the rigidity of corrugated tube self, rely on the elastic deformation sealing of O type rubber seal, needn't make corrugated tube generation axial plastic deformation just can reach sealing effectiveness, both avoid corrugated tube generation axial plastic deformation to increase shaping difficulty, also guarantee the elastic performance of corrugated tube.Can, according to different bellows component specifications, select the steel pipe of close specification, design different flanges and change different O type rubber seal, thereby meet the bubble-tight testing requirement of high-temperature hard sealing ball valve corrugated metal pipe components air pressure.

The features such as the utility model also has simple and reasonable, and safety easy to use detects simply, is convenient to safeguard, range of application is wide, long service life.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the invention will be further described.

Fig. 1 is the utility model tightness test device structural representation sketch;

Fig. 2 is the utility model air pressure air-tight test simplified schematic diagram.

Description of reference numerals: upper flange 1, screw rod 2, nut 3, Vertical Steel body 4, draft tube interface 5, O type rubber seal 6, O type rubber seal 7, corrugated metal pipe components 8, O type rubber seal 9, lower flange 10, tank 11, tightness test device 12, draft tube 13, compressed air source 14.

Below in conjunction with accompanying drawing and by example, the utility model is described in further detail; but following example is only the utility model example wherein; do not represent the rights protection scope that the utility model limits, rights protection scope of the present utility model is as the criterion with claim.

Embodiment

Shown in accompanying drawing 1-2, below will describe with reference to the accompanying drawings concrete structure of the present utility model in detail; Test unit includes one section of Vertical Steel body 4, the bottom of Vertical Steel body 4 and top are respectively arranged with a lower flange 10 and upper flange 1, Vertical Steel body 4 and lower flange 10 structure that is welded as a whole is provided with O type rubber seal 6 on the surface of contact of Vertical Steel body 4 outer walls and upper flange 1; Between the lower flange 10 of Vertical Steel body 4 outsides and upper flange 1, be also set with a corrugated metal pipe components 8, this corrugated metal pipe components 8 and the same seal groove that is provided with O type built-in rubber O-ring seal 7,9 in surface of contact place between lower flange 10 and upper flange 1; The fastening structure that is evenly distributed with screw rod 2, nut 3 between the lower flange 10 in Vertical Steel body 4 inner sides and corrugated metal pipe components 8 outsides and upper flange 1 also has draft tube interface 5 on the sidewall of Vertical Steel body 4;

Test method comprises: first by after integrally welded to lower flange 10 and Vertical Steel body 4, screw rod 2 is penetrated in the through hole of lower flange 10, lock with nut 3, O type rubber seal 9 is put into the seal groove of lower flange 10, then corrugated metal pipe components 8 is placed on lower flange 10, again the upper flange 1 of having placed O type rubber seal 6 and O type rubber seal 7 in seal groove is placed in corrugated metal pipe components 8, finally locks upper flange 1 with nut 3; Before test, first draft tube interface 5 is tightly connected by draft tube 13 and compressed air source 14, the corrugated metal pipe components air pressure tightness test device entirety of again high-temperature hard sealing ball valve being used is put into the tank 11 that water is housed and is carried out gas pressure test, thereby completes air pressure air-tight test.

Test unit, see Fig. 2, comprise tank 11 and pressurized air 14, the component feature of corrugated metal pipe components air pressure tightness test device for cover high-temperature hard sealing ball valve: see Fig. 1, upper flange 1 and lower flange 10 are annular, external diameter is larger than bellows component external diameter, internal diameter is less than bellows component internal diameter, thickness is advisable to meet requirement of strength, there is positioning table near bellows component inner radius, the positioning table height 2~5mm of lower flange 10, the positioning table height of upper flange 1 and thickness are advisable to hold lower O type rubber seal 6, upper flange 1, lower flange 10 inner sides have seal groove near the position of bellows component flange, the seal groove degree of depth and width can hold lower O type rubber seal 7 and O type rubber seal 9, upper flange 1 and lower flange 10 have the corresponding through hole of some center pits, be used for wearing screw rod.

Steel pipe 4 lower ends and lower flange 10 weld together, and upper end and upper flange 1 positioning step contact site process sealing surface.Sidewall is opened a through hole or threaded hole for applicable draft tube interface 5 is installed.

Screw rod 2 lower ends have the face of cylinder, 5mm left and right and lower flange formation to coordinate assurance that positioning precision is installed, the positioning step of intermediate portion should be suitable with bellows component height, prevent bellows component in process of the test by supercompression, increase the difficulty of follow-up trimming.

The combination of air pressure tightness test device 12: after lower flange 10 is integrally welded with steel pipe 4, screw rod 4 is penetrated in the through hole of lower flange 10, lock with nut 3, O type rubber seal 9 is put into the seal groove of lower flange 10, high-temperature hard sealing ball valve is placed on lower flange 10 by corrugated metal pipe components 8, again the upper flange 1 of having placed O type rubber seal 6 and O type rubber seal 7 in seal groove is placed on to high-temperature hard sealing ball valve with in corrugated metal pipe components 8, finally locks upper flange with nut 10.

When air pressure air-tight test, pressurized air in compressed air source 14 is imported to draft tube interface 5 by draft tube 13, again high-temperature hard sealing ball valve being put into the tank 11 that water is housed by corrugated metal pipe components air pressure tightness test device 12 entirety tests, if there is bubble to emit continuously the bellows component 8 of issuing a certificate to have leak source from water in 3min, otherwise prove that bellows component air pressure air-tight test is qualified, thereby complete air pressure air-tight test.

This air pressure tightness test device 12 can be according to different bellows component specifications, select the steel pipe of close specification, design different flanges and change different O type rubber seal, thereby meeting the bubble-tight testing requirement of high-temperature hard sealing ball valve corrugated metal pipe components air pressure.

Claims (3)

1. a corrugated metal pipe components tightness test device, it includes one section of vertical metal tubular body, flange, it is characterized in that: bottom and top at vertical metal tubular body are respectively arranged with a lower flange and upper flange, vertical metal tubular body and the lower flange structure that is welded as a whole is provided with O type rubber seal on the surface of contact of vertical metal tubular body outer wall and upper flange; Between the lower flange of vertical metal tubular body outside and upper flange, be also set with a corrugated metal pipe components, this corrugated metal pipe components and the same seal groove that is provided with built-in rubber O-ring seal in surface of contact place between lower flange and upper flange; The fastening structure that is evenly distributed with screw rod, nut between lower flange outside vertical metal tubular body inner side and corrugated metal pipe components and upper flange also has draft tube interface or screw thread draft tube interface on the sidewall of vertical metal tubular body.
2. corrugated metal pipe components tightness test device according to claim 1, is characterized in that: described vertical metal tubular body is selected Vertical Steel body.
3. corrugated metal pipe components tightness test device according to claim 1, is characterized in that: be also provided with a limited step suitable with corrugated metal pipe components height at screw rod middle part.
CN201420035626.1U 2014-01-21 2014-01-21 Metal bellows assembly air tightness test device CN203705128U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420035626.1U CN203705128U (en) 2014-01-21 2014-01-21 Metal bellows assembly air tightness test device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420035626.1U CN203705128U (en) 2014-01-21 2014-01-21 Metal bellows assembly air tightness test device

Publications (1)

Publication Number Publication Date
CN203705128U true CN203705128U (en) 2014-07-09

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CN201420035626.1U CN203705128U (en) 2014-01-21 2014-01-21 Metal bellows assembly air tightness test device

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CN (1) CN203705128U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
CN105407694A (en) * 2015-12-21 2016-03-16 河北汉光重工有限责任公司 Electromagnetic shielding low-torque rotary airtight sealing device
CN103759901B (en) * 2014-01-21 2016-04-27 沈阳仪表科学研究院有限公司 Corrugated metal pipe components tightness test device and test method
US10565848B2 (en) 2015-03-26 2020-02-18 Dripdrone, Inc. Fluid leak detection methods, systems and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759901B (en) * 2014-01-21 2016-04-27 沈阳仪表科学研究院有限公司 Corrugated metal pipe components tightness test device and test method
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
US10565848B2 (en) 2015-03-26 2020-02-18 Dripdrone, Inc. Fluid leak detection methods, systems and apparatus
CN105407694A (en) * 2015-12-21 2016-03-16 河北汉光重工有限责任公司 Electromagnetic shielding low-torque rotary airtight sealing device

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GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20140709

Effective date of abandoning: 20160427

C25 Abandonment of patent right or utility model to avoid double patenting