CN103244696A - External-pressure type bellows globe valve with non-rotating valve rod - Google Patents
External-pressure type bellows globe valve with non-rotating valve rod Download PDFInfo
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- CN103244696A CN103244696A CN2013101897819A CN201310189781A CN103244696A CN 103244696 A CN103244696 A CN 103244696A CN 2013101897819 A CN2013101897819 A CN 2013101897819A CN 201310189781 A CN201310189781 A CN 201310189781A CN 103244696 A CN103244696 A CN 103244696A
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Abstract
The invention relates to an external-pressure type bellows globe valve with a non-rotating valve rod. The external-pressure type bellows globe valve with the non-rotating valve rod is composed of a valve body, a valve core, a special metal bellows, a valve seat, a valve cover, a flange, filling, the valve rod and an adjusting part. The external-pressure type bellows globe valve with the non-rotating valve rod comprises a quadruple sealing mode which is achieved by closing the valve, opening a stop back seal structure, forming a metal shield when the periphery of the special metal bellows is pressed and filling heat resisting materials. The valve core stop back seal structure is formed after the valve is opened, and the valve rod is matched with a valve rod nut with a rolling rotation steel ball to achieve a non-rotating vertical motion structure. When in use, the external-pressure type bellows globe valve with the non-rotating valve rod has a small friction force and very little abrasion loss, thereby being good in sealing performance, safe, reliable, long in service life, easy to operate and particularly applicable to high-temperature, high-pressure, radioactive, flammable and explosive mediums and places which have damage on aspects such as health, security and environment.
Description
Technical field
The present invention relates to poisonous, keying and control gear that radioactivity or hazardous medium such as inflammable and explosive are arranged in all kinds of instrument of industrial automation control system (flow, differential pressure, pressure, liquid level etc.) pipeline and other industrial pipeline.
Background technique
The structure of the stop valve of extensive use is all prevented the external leakage sealing by last filler, owing to there is motion between filler and the valve rod, produce inevitable friction and wear factor, thereby structurally exist the possibility of leakage, and some medium (as: high temperature, high pressure, poisonous, inflammable, explosive, have radioactivity etc. that safety, environment and biological health are worked the mischief) has not allowed to leak outside.
The present bellows stop valve structure of China is single, can only be applied under the working condition of low pressure, low temperature and security medium, and working life is short, is not suitable for high temperature, high pressure and occasion dangerous or that may damage environment, life.
Summary of the invention
The object of the present invention is to provide a kind of with the spacious sealing of the peripheral pressurized screen of special-purpose metal bellows, spool directly welds and vertical placing between valve body, valve seat and valve gap, the adjusting element with metal bellows together with valve rod and flange, carry out closing sealing, opening valve and stop back seal, the spacious sealing of wavy metal tube panel and the sealing of packing seal quadruple and ensure the bellows stop valve of straight-line high temperature, high pressure, high reliability about valve rod does not rotate of valve.
Technological scheme of the present invention is:
1, a kind of valve rod does not rotate the external-compression type bellows stop valve, is made up of valve body, spool, special-purpose metal bellows, valve seat, valve gap, flange, filler, valve rod, adjusting element, bearing support, steel ball, Stem Mut, axle sleeve etc.; It is characterized in that: special-purpose metal bellows a end and spool welded seal, its b end and flange welded seal, spool is connected with threaded stem, constitutes bellows component.Be placed in the valve seat, flange below and top have metal o-ring b and metal o-ring c respectively, and the screw-thread fit fit sealing on valve gap and valve seat top and fastening locknut location down prevent from becoming flexible.The valve seat bottom has between metal o-ring a and the valve body top by screw-thread fit and fit sealing.Two Packing seats are respectively at the two ends up and down of filler, place in the valve gap and between the valve rod, adjusting element screws in the internal thread of valve gap and regulates with spanner, make it compress filler and reach behind the sealing effect last locknut locking and positioning.The inner installation shaft bearing of adjusting element, the steel ball of full several same sizes of packing on the outer step of bearing support and Stem Mut and the circumference between the axle sleeve, the fastening locknut in appropriate back, adjusting axle cover gap rotates and axially locating Stem Mut easily lubricatedly.Because the sealed filler of valve rod is tightly embraced and can not be rotated, the top of Stem Mut installs and fixes handle or handwheel, and rotatable handle or handwheel drive the Stem Mut rotation, thereby makes valve rod straight line motion up and down, carries out the opening and closing of valve like a cork.
2, special-purpose metal bellows, process after overlapping by one to multiple layer thin metallic tubd, determine the different number of plies and wall thickness respectively according to the height of valve pressure and temperature, its length, the pitch of waves, wave number and inner and outer diameter design according to technical parameters such as the flow of valve, latus rectum, switching paths.
3, can add welding between valve body port and the valve seat and between valve seat and the flange, increase sealing intensity.
4, spool and valve body center communication port closure during throttle down form first road and close sealing; When opening valve, step closure in the reverse conical surface of spool and the valve seat forms and oppositely stops back seal, forms the second resealing structure; The special-purpose metal bellows welds with spool and flange respectively, and it is spacious to form the peripheral pressurized metal screen of bellows, has guaranteed that valve can not produce external leakage, becomes the triple seal structure; Add packing seal structure, constitute the quadruple sealing configuration.
5, an end of described spool is the valve switch sealing surface, and the other end is that internal thread is connected with valve rod, and intermediary outside has a reverse circular cone.
6, one of described adjusting element is that outside thread cooperates with valve gap, and the stage casing is outer-hexagonal, and inside has hole and the screw thread that cooperates with valve rod, bearing support, Stem Mut, axle sleeve respectively.
7, an end of described Stem Mut is the one section cylindrical that cooperates with bearing support, internal thread and valve rod are engaged to the suitable degree of depth, the other end is cylinder, square body and the screw thread that cooperates with axle sleeve, handle or handwheel etc. respectively, intermediary outside has a step, and its both sides have puts steel ball and the circular trough consistent with spherical cambered surface respectively.
Advantage of the present invention and beneficial effect are:
1, the present invention adopts the spacious sealing of the peripheral pressurized metal screen of special-purpose metal bellows and metal o-ring hard sealing structure; high temperature high voltage resistant sealability excellence, reliable; close sealing again, open termination back seal and high temperature resistant packing seal protection; preventing from having realized aspect the external leakage that quadruple sealing and quadruple insure, be specially adapted to high temperature, high pressure and aspects such as health, safety, environment had medium and the occasion of harm.
2, the present invention adopts steel ball rolling lubrication rotary valve rod nut structure, spool, special-purpose metal bellows and packing seal all concentrate on the valve rod one, stuffing box packing embraces tightly that valve rod can not rotate and straight line motion up and down, greatly alleviate frictional force and wear extent between filler and the valve rod, improved working life and the handling of valve greatly.
3, the present invention adopts valve open to stop the back seal structure dexterously; not only cut off MEDIA FLOW effectively to bellows; alleviate temperature, pressure influence and the leakage factor of upper components such as bellows; and the stroke of valve switch, fatigue strength and the working life of protecting and having improved bellows have greatly been limited.
4, because the present invention's peripheral compression seal structure that is the special-purpose metal bellows, pressure medium evenly distributes and is enclosed in the metal bellows outer periphery, protects better and has strengthened special-purpose metal bellows compressive strength and anti-fatigue performance.
Description of drawings
Fig. 1 does not rotate the sectional structure chart of external-compression type bellows stop valve for valve rod.
Fig. 2 is the special-purpose metal bellows component sectional structure chart among Fig. 1.
Among the figure: 1, valve body 1-1, port 2, spool 2-1, valve switch sealing surface 2-2, the reverse circular cone 3 of spool, metal o-ring a 4, special-purpose metal bellows 4-1, special-purpose metal bellows a holds 4-2, special-purpose metal bellows b end 5, valve seat 5-1, step 5-2 in the valve seat, valve seat port 6, following locknut 7, valve gap 8, metal o-ring b 9, flange 10, metal o-ring c 11, Packing seat 12, filler 13, valve rod 13-1, screw thread 14, adjusting element 15, last locknut 16, bearing support 17, steel ball 18, Stem Mut 19, locknut 20, axle sleeve 21, handle or handwheel 22, packing ring 23, nut
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
1, a kind of valve rod does not rotate the external-compression type bellows stop valve, is made up of valve body 1, spool 2, special-purpose metal bellows 4, valve seat 5, valve gap 7, flange 9, filler 12, valve rod 13, adjusting element 14, bearing support 16, steel ball 17, Stem Mut 18, axle sleeve 20 etc.; It is characterized in that: an end welded seal of special-purpose metal bellows a end 4-1 and spool 2, special-purpose metal bellows b end 4-2 and flange 9 welded seals, an end of spool 2 is threaded with valve rod 13, constitutes bellows component.Be placed in the valve seat 5, flange 9 belows and top have metal o-ring b8 and metal o-ring c10 respectively, and the screw-thread fit fit sealing on the screw thread of valve gap 7 and valve seat 5 tops and to tighten down locknut 6 fixing prevents from becoming flexible.Valve seat 5 bottoms have between metal o-ring a3 and valve body 1 top by screw-thread fit and fit sealing.Two Packing seats 11 are respectively at the two ends up and down of filler 12, place in the valve gap 7 with valve rod 13 between, adjusting element 14 screws in the internal thread of valve gaps 7 and with the spanner adjusting, makes it compress filler 12 and reaches behind the sealing effect last locknut 15 locking and positioning.Adjusting element 14 inner installation shaft bearings 16, pack on the outer step of bearing support 16 and Stem Mut 18 and the circumference between the axle sleeve 20 steel ball 17 of several same sizes, regulate axle sleeve 20 and make the fastening locknut 19 in suitable back, gap, Stem Mut 18 is easily rotated and axially locating lubricatedly.Because valve rod 13 sealed fillers 12 are tightly embraced and can not be rotated, the top of Stem Mut 18 installs and fixes handle or handwheel 21, rotatable handle or handwheel 21 drives Stem Muts 18 rotations, thereby makes valve rod straight line motion about in the of 13, carries out the opening and closing of valve like a cork.
2, the special-purpose metal bellows 4, process after overlapping by one to multiple layer thin metallic tubd, determine the different number of plies and wall thickness respectively according to the height of valve pressure and temperature, its length, the pitch of waves, wave number and inner and outer diameter design according to technical parameters such as the flow of valve, latus rectum, switching paths.
3, can add welding between the port one of valve body 1-1 and the valve seat 5 and between the 5-2 of valve seat 5 and the flange 9.
4, during throttle down, spool 2-1 and valve body 1 center communication port closure form first road and close sealing; When opening valve, step 5-1 closure in spool reverse circular cone 2-2 face and the valve seat forms and oppositely stops back seal, forms the second resealing structure; Weld with spool 2 and flange 9 respectively at the two ends of special-purpose metal bellows 4, and it is spacious to form the peripheral pressurized metal screen of bellows, has guaranteed that valve can not produce external leakage, becomes the triple seal structure; Add packing seal structure, constitute the quadruple sealing configuration.
5, an end of described spool 2 is valve switch sealing surface 2-1, and the other end is that internal thread is connected with valve rod, and intermediary outside has a reverse circular cone 2-2.
6, one of described adjusting element 14 is that outside thread cooperates with valve gap 6, and the stage casing is outer-hexagonal, and inside has hole and the screw thread that cooperates with valve rod 2, bearing support 16, Stem Mut 18, axle sleeve 20 respectively.
7, an end of described Stem Mut 18 is the one section cylindrical that cooperates with bearing support 16, internal thread and valve rod 2 are engaged to the suitable degree of depth, the other end is cylinder, square body and the screw thread that cooperates with axle sleeve 20, handle or handwheel 21 etc. respectively, there is a step outside, stage casing, and its both sides have puts steel ball 17 and the circular trough consistent with spherical cambered surface respectively.
Claims (7)
1. a valve rod does not rotate the external-compression type bellows stop valve, it is made up of valve body (1), spool (2), special-purpose metal bellows (4), valve seat (5), valve gap (7), flange (9), filler (12), valve rod (13), adjusting element (14), Stem Mut (18), axle sleeve (20) etc., it is characterized in that: an end welded seal of special-purpose metal bellows a end 4-1 and spool 2, special-purpose metal bellows b end 4-2 and flange 9 welded seals, one end of spool 2 is threaded with valve rod 13, constitutes bellows component; Be placed in the valve seat 5, flange 9 belows and top have metal o-ring b8 and metal o-ring c10 respectively, the screw-thread fit fit sealing on the screw thread of valve gap 7 and valve seat 5 tops and to tighten down locknut 6 fixing; Valve seat 5 bottoms have between metal o-ring a3 and valve body 1 top by screw-thread fit and fit sealing; Two Packing seats 11 are respectively at the two ends up and down of filler 12, place in the valve gap 7 with valve rod 13 between, adjusting element 14 screws in the internal thread of valve gaps 7 and with the spanner adjusting, makes it compress filler 12 and reaches behind the sealing effect last locknut 15 locking and positioning.
2. do not rotate the external-compression type bellows stop valve according to the described valve rod of claim 1, it is characterized in that: adjusting element 14 inner installation shaft bearings 16, pack on the outer step of bearing support 16 and Stem Mut 18 and the circumference between the axle sleeve 20 steel ball 17 of several same sizes, regulate axle sleeve 20 and make the fastening locknut 19 in suitable back, gap, Stem Mut 18 is easily rotated and axially locating lubricatedly.
3. do not rotate the external-compression type bellows stop valve according to the described valve rod of claim 1, it is characterized in that: when opening valve, valve rod is carried on (13), drives interior step (5-1) closure of the reverse conical surface (2-2) of spool (2) and valve seat (5), forms and oppositely stops back seal.
4. do not rotate the external-compression type bellows stop valve according to the described valve rod of claim 1, it is characterized in that: can add welding between the port one of valve body 1-1 and the valve seat 5 and between the 5-2 of valve seat 5 and the flange 9.
5. do not rotate the external-compression type bellows stop valve according to the described valve rod of claim 1, it is characterized in that: an end of described spool 2 is valve switch sealing surface 2-1, and the other end is that internal thread is connected with valve rod, and intermediary outside has a reverse circular cone 2-2.
6. according to the described adjusting element 14 of claim 2, it is characterized in that: one of adjusting element 14 is that outside thread cooperates with valve gap 6, and the stage casing is outer-hexagonal, and inside has hole and the screw thread that cooperates with valve rod 2, bearing support 16, Stem Mut 18, axle sleeve 20 respectively.
7. according to the described Stem Mut 18 of claim 2, it is characterized in that: an end of Stem Mut 18 is the one section cylindrical that cooperates with bearing support 16, internal thread and valve rod 2 are engaged to the suitable degree of depth, the other end is cylinder, square body and the screw thread that cooperates with axle sleeve 20, handle or handwheel 21 etc. respectively, there is a step outside, stage casing, and its both sides have puts steel ball 17 and the circular trough consistent with spherical cambered surface respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101897819A CN103244696A (en) | 2013-05-17 | 2013-05-17 | External-pressure type bellows globe valve with non-rotating valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101897819A CN103244696A (en) | 2013-05-17 | 2013-05-17 | External-pressure type bellows globe valve with non-rotating valve rod |
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| CN103244696A true CN103244696A (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101897819A Pending CN103244696A (en) | 2013-05-17 | 2013-05-17 | External-pressure type bellows globe valve with non-rotating valve rod |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591337A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Three-valve group of corrugated pipe instrument |
| CN103591336A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Two-valve group of corrugated pipe instrument |
| CN103591335A (en) * | 2013-11-23 | 2014-02-19 | 江苏星河阀门有限公司 | Novel instrument three-valve manifold |
| CN103912695A (en) * | 2013-11-25 | 2014-07-09 | 江苏星河阀门有限公司 | Corrugated pipe instrument five valve group |
| CN104209637A (en) * | 2014-07-31 | 2014-12-17 | 江苏星河阀门有限公司 | Welding method of high-temperature and high-pressure corrugated pipe cutoff valve |
| CN105003655A (en) * | 2015-05-15 | 2015-10-28 | 扬中市阀门厂有限公司 | High-pressure connecting rod type bellows globe valve |
| WO2016058152A1 (en) * | 2014-10-16 | 2016-04-21 | 余金海 | Gate valve and manufacturing process thereof |
| CN109357027A (en) * | 2018-11-16 | 2019-02-19 | 重庆宗星机械有限责任公司 | A kind of combined type shut-off valve |
| CN112833207A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Thermal recovery well head gate valve |
| CN112833194A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Needle valve |
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| CN2226176Y (en) * | 1995-05-30 | 1996-05-01 | 大连贵友机电有限公司 | Low-temp. bellows valve for ship |
| CN2309476Y (en) * | 1997-10-05 | 1999-03-03 | 徐林斌 | Bellows stop valve |
| CN2856609Y (en) * | 2005-12-23 | 2007-01-10 | 上海化工研究院 | Cut-off valve with sylphone seal structure |
| CN101334116A (en) * | 2008-07-11 | 2008-12-31 | 江苏星河集团有限公司 | Stop valve of bellows instrument |
| CN101655159A (en) * | 2009-09-10 | 2010-02-24 | 方建生 | Full-seal zero-leakage stop valve |
| CN203442144U (en) * | 2013-05-17 | 2014-02-19 | 江苏星河阀门有限公司 | External-pressure type bellows stop valve with non-rotating valve rod |
-
2013
- 2013-05-17 CN CN2013101897819A patent/CN103244696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2226176Y (en) * | 1995-05-30 | 1996-05-01 | 大连贵友机电有限公司 | Low-temp. bellows valve for ship |
| CN2309476Y (en) * | 1997-10-05 | 1999-03-03 | 徐林斌 | Bellows stop valve |
| CN2856609Y (en) * | 2005-12-23 | 2007-01-10 | 上海化工研究院 | Cut-off valve with sylphone seal structure |
| CN101334116A (en) * | 2008-07-11 | 2008-12-31 | 江苏星河集团有限公司 | Stop valve of bellows instrument |
| CN101655159A (en) * | 2009-09-10 | 2010-02-24 | 方建生 | Full-seal zero-leakage stop valve |
| CN203442144U (en) * | 2013-05-17 | 2014-02-19 | 江苏星河阀门有限公司 | External-pressure type bellows stop valve with non-rotating valve rod |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591335A (en) * | 2013-11-23 | 2014-02-19 | 江苏星河阀门有限公司 | Novel instrument three-valve manifold |
| CN103591337A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Three-valve group of corrugated pipe instrument |
| CN103591336A (en) * | 2013-11-25 | 2014-02-19 | 江苏星河阀门有限公司 | Two-valve group of corrugated pipe instrument |
| CN103912695A (en) * | 2013-11-25 | 2014-07-09 | 江苏星河阀门有限公司 | Corrugated pipe instrument five valve group |
| CN104209637A (en) * | 2014-07-31 | 2014-12-17 | 江苏星河阀门有限公司 | Welding method of high-temperature and high-pressure corrugated pipe cutoff valve |
| WO2016058152A1 (en) * | 2014-10-16 | 2016-04-21 | 余金海 | Gate valve and manufacturing process thereof |
| CN105003655A (en) * | 2015-05-15 | 2015-10-28 | 扬中市阀门厂有限公司 | High-pressure connecting rod type bellows globe valve |
| CN109357027A (en) * | 2018-11-16 | 2019-02-19 | 重庆宗星机械有限责任公司 | A kind of combined type shut-off valve |
| CN112833207A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Thermal recovery well head gate valve |
| CN112833194A (en) * | 2019-11-25 | 2021-05-25 | 中国石油天然气股份有限公司 | Needle valve |
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Application publication date: 20130814 |