CN103672008A - Ball valve with all-welded valve bodies and welding method of ball valve - Google Patents
Ball valve with all-welded valve bodies and welding method of ball valve Download PDFInfo
- Publication number
- CN103672008A CN103672008A CN201310610759.7A CN201310610759A CN103672008A CN 103672008 A CN103672008 A CN 103672008A CN 201310610759 A CN201310610759 A CN 201310610759A CN 103672008 A CN103672008 A CN 103672008A
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- Prior art keywords
- valve
- welding
- valve body
- barrel
- ball valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/06—Welding by high-frequency current heating characterised by the shielding of the welding zone against influence of the surrounding atmosphere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/10—Welded housings
- F16K27/107—Welded housings for taps or cocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a ball valve with all-welded valve bodies and a welding method of the ball valve. The ball valve comprises a spherical valve spool, a left valve body, a right valve body, a middle valve body, a valve stem, a valve seat, sealing rings, a press plate, a lining plate and the like. The ball valve is applicable to valve systems in gas and liquid delivery pipelines, and a high-frequency welding process is adopted to produce sealed parts. The spherical valve spool is placed in a spherical cavity in the middle valve body together with the lining plate, a thrust plate, a sliding bearing and the like, the sealing rings are mounted on the left and right sides of the spherical valve spool, the valve seat and a valve-seat support ring thereof are mounted on the inner walls of the valve bodies on the left and right sides together with an elastic mechanism, joint parts between the middle valve body and the left and right valve bodies are all sealed by welding, and one end of the valve stem penetrates the middle valve body and is connected with the internal valve spool. The valve stem rotates to drive the spherical valve spool in the cavity to rotate, so that the valve is controlled to be turned off. The ball valve is simple in structure, good in sealing performance, stable in welding and sealing quality, high in production efficiency and applicable to pipeline delivery systems for petroleum, natural gas and the like, and the problem of leakage of conventional valves is solved.
Description
Technical field
The present invention relates to technical field of valve manufacturing, especially for a kind of ball valve and welding method thereof of full welding valve body.
Background technique
For long apart from for the pipeline of transfer oil, rock gas, not only discharge pressure is high, and be mostly embedded in underground, once reveal, be both difficult to find, inconvenient maintenance again, so the quality of the performance parameters such as the sealability of the valve using in pipeline, reliability is directly determining safety and efficiency that pipeline is carried.
What at present pipeline transportation art adopted mostly is the ball valve that entirely welds valve body, because its fluid resistance is little, good seal performance, switch rapidly and reliability high, make it become the new lover of valve field.Although this valve has improved the leakage problem that traditional gate valve faces to a great extent, but still there are a lot of other problemses, first its submerged arc welding groove is straight trough shape or V flute profile, is unfavorable for deslagging, exhaust, and weld seam easily produces cinder hole, pore, affect the intensity of weld seam, weld stress is concentrated, and heat affected zone residual stress is large, and the thermal distortion of weldment is large, may produce stress crack and shorten working life of valve, and make the raw gap of valve seal by-product and can not seal.Secondly, the binary fabricated structure that its valve seat is comprised of bracing ring and piston assembly, has increased the volume of valve seat and valve body; The 3rd, its valve gap is overall structure, causes filler or seal ring to change; The 4th, its valve seat only has a sealing surface, and after seat, sealing configuration is also to realize by the seal ring of one or one group equal diameters, and the sealing of valve rod also adopts " external ", these had both affected the sealability of valve, also made seal ring fragile, had affected the working life of valve.
At present, the welding manner of all-welded ball valve is mainly to automatic/semi-automatic submerged arc welding, during normal welding, because high-temperature residence time is short, rate of heating is fast, after this do not pass through corresponding subsequent treatment thereupon naturally cooling, this non-uniform heat flux and cooling procedure must cause the generation of welding residual stress, are unfavorable for improving the quality of weldment.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of ball valve and welding method thereof of full welding valve body is provided.
A ball valve for full welding valve body, comprises foot rest, middle valve body, right valve barrel, straight pin, liner plate, the first socket head screw, an O RunddichtringO, tie-plate, the 2nd O RunddichtringO, the 3rd O RunddichtringO, valve rod, the second socket head screw, gland, the 4th O RunddichtringO, pad, static spring, valve seat bearing ring, spring, the 5th O RunddichtringO, valve seat, left valve barrel, thrust washer, sliding bearing, ball valve core, foot rest is fixed on middle valve body below by screw attachment, right valve barrel and left valve barrel are fixed by welding in respectively the middle valve body left and right sides, ball valve core is fixed and is positioned at by liner plate in the spherical cavity of middle valve inner formation, ball valve core and liner plate surface of contact are provided with thrust washer and sliding bearing, between liner plate and left valve barrel and right valve barrel, by straight pin, be fixedly connected with, ball valve core is connected with the inwall of left valve barrel and right valve barrel by the elastic mechanism being comprised of with spring valve seat bearing ring, between valve seat bearing ring and left valve barrel, the 4th O RunddichtringO is all housed between valve seat bearing ring and right valve barrel, valve rod one end is placed in outside valve body upside and is threaded with rotating disc, the other end is through gland, tie-plate also penetrates middle valve body and is connected with the ball valve core of being located at internal cavities, wherein between valve rod lower end and ball valve core, be provided with elastic mechanism static spring, gland is fixed on tie-plate by the second socket head screw, tie-plate is fixed on middle valve body top by the first socket head screw, and between gland and valve rod, between valve rod and tie-plate, between tie-plate and gland, be equipped with seal arrangement.
Interface position between described middle valve body and left valve barrel, between middle valve body and right valve barrel is equipped with " U " type groove, adopts high frequency welding method to carry out welded seal.
The welding method of the ball valve of full welding valve body comprises the following steps:
1) product final assemble, by also coordinating with left valve barrel, right valve barrel respectively after middle valve body both sides installation seal ring, carries out general assembly clamping;
2) tentatively use spot-welded, test products performance, can carry out the high frequency welding of whole valve body after qualified;
3) before weldering, prepare, 25～35mm place, weldment edge is cleaned clean and wipes surperficial oxide off with acetone with sand papering, and passivation, remove spot welding welding slag;
4) select the high-frequency welder of 100KW, width of induction coil B is 30mm, and variable-frequency power sources is≤2000A that frequency is 100KHz;
5) choosing " U " type groove is weld seam, and welding wire is selected ER50-6 welding wire, and solder flux is selected BNi68CrWB nichrome;
6) nichrome is evenly sprayed to face of weld, and melt under the hot environment of 1100 ℃ of left and right and argon shield, in matrix surface precipitation, form the alloy protecting layer that a layer thickness is about 0.05 μ m, then the welding wire melting in whole lap welding being stitched with high-frequency induction heating power, inductor coil has the space of 5～8mm from solder flux surface, keep tubing welding angular aperture at 4～5 °;
7) after welding treatment, remove oxide on surface and other pollutants, and under the dry condition, blast cleaning is carried out on butt welded seam surface, and use glass granules shot blasting with pickling, falls into oblivion, and scrubs and polishing.
Use the present invention, between left and right valve body and middle valve body, adopt all-weld joint, good seal performance, leakage problem is solved, and cost is low, and extend working life.Welding manner is taked high frequency welding, the heat of heating welding wire is directly in the inner generation of weldment, this mode of heating speed is fast, homogeneous heating, and efficiency is high, can moment melt metal, and rate of heating and temperature are controlled, and the work for the treatment of of follow-up weld seam circumference, make to weld smooth, intensity is high, steady quality.The cinder hole pore that this is bad with regard to the sealability of having been avoided traditional submerged arc welding to produce, weld seam easily produces, stress are concentrated etc. problem.The present invention converts on traditional ball valve basis, and adopts high frequency entirely to weld, and airtight quality is good, with high content of technology, and manufacturing efficiency is high, has reduced workman's labor intensity.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention welds the ball valve of valve body entirely;
Fig. 2 is the ball valve local welding schematic diagram that the present invention welds valve body entirely;
In figure, foot rest 1, middle valve body 2, right valve barrel 3, straight pin 4, liner plate 5, the first socket head screw 6, an O RunddichtringO 7, tie-plate 8, the 2nd O RunddichtringO 9, the 3rd O RunddichtringO 10, valve rod 11, the second socket head screw 12, gland 13, the 4th O RunddichtringO 14, pad 15, static spring 16, valve seat bearing ring 17, spring 18, the 5th O RunddichtringO 19, valve seat 20, left valve barrel 21, thrust washer 22, sliding bearing 23, ball valve core 24, welding bench 25, press machine 26, inductor coil 27, welding wire 28.
Embodiment
As shown in Figure 1, a kind of ball valve of full welding valve body, it comprises foot rest (1), middle valve body (2), right valve barrel (3), straight pin (4), liner plate (5), the first socket head screw (6), the one O RunddichtringO (7), tie-plate (8), the 2nd O RunddichtringO (9), the 3rd O RunddichtringO (10), valve rod (11), the second socket head screw (12), gland (13), the 4th O RunddichtringO (14), pad (15), static spring (16), valve seat bearing ring (17), spring (18), the 5th O RunddichtringO (19), valve seat (20), left valve barrel (21), thrust washer (22), sliding bearing (23), ball valve core (24), foot rest (1) is fixed on middle valve body (2) below by screw attachment, right valve barrel (3) and left valve barrel (21) are fixed by welding in respectively middle valve body (2) left and right sides, ball valve core (24) is fixed and is positioned in the inner spherical cavity forming of middle valve body (2) by liner plate (5), ball valve core (24) and liner plate (5) surface of contact are provided with thrust washer (22) and sliding bearing (23), between liner plate (5) and left valve barrel (21) and right valve barrel (3), by straight pin (4), be fixedly connected with, ball valve core (24) is connected with the inwall of right valve barrel (3) with left valve barrel (21) by the elastic mechanism being comprised of with spring (18) valve seat bearing ring (17), between valve seat bearing ring (17) and left valve barrel (21), between valve seat bearing ring (17) and right valve barrel (3), the 4th O RunddichtringO is all housed, valve rod (11) one end is placed in outside valve body (2) upside and is threaded with rotating disc, the other end is through gland (13), tie-plate (8) also penetrates middle valve body (2) and is connected with the ball valve core (24) of being located at internal cavities, wherein between valve rod (11) lower end and ball valve core (24), be provided with elastic mechanism static spring (16), gland (13) is fixed on tie-plate (8) by the second socket head screw (13), tie-plate (8) is fixed on middle valve body (2) top by the first socket head screw (6), and between gland (13) and valve rod (11), between valve rod (11) and tie-plate (8), between tie-plate (8) and gland (13), be equipped with seal arrangement.Interface position between middle valve body (2) and left valve barrel (21), between middle valve body (2) and right valve barrel (3) is equipped with " U " type groove, adopts high frequency welding method to carry out welded seal;
A welding method for the ball valve of full welding valve body, it comprises the following steps:
1) product final assemble, by also coordinating with left valve barrel (22), right valve barrel (3) respectively after middle valve body (2) both sides installation seal ring, carries out general assembly clamping;
2) tentatively use spot-welded, test products performance, can carry out the high frequency welding of whole valve body after qualified;
3) before weldering, prepare, 25～35mm place, weldment edge is cleaned clean and wipes surperficial oxide off with acetone with sand papering, and passivation, remove spot welding welding slag;
4) select the high-frequency welder of 100KW, width of induction coil B is 30mm, and variable-frequency power sources is≤2000A that frequency is 100KHz;
5) choosing " U " type groove is weld seam, and welding wire is selected ER50-6 welding wire, and solder flux is selected BNi68CrWB nichrome;
6) nichrome is evenly sprayed to face of weld, and melt under the hot environment of 1100 ℃ of left and right and argon shield, in matrix surface precipitation, form the alloy protecting layer that a layer thickness is about 0.05 μ m, then the welding wire melting in whole lap welding being stitched with high-frequency induction heating power, inductor coil has the space of 5～8mm from solder flux surface, keep tubing welding angular aperture at 4～5 °;
7) after welding treatment, remove oxide on surface and other pollutants, and under the dry condition, blast cleaning is carried out on butt welded seam surface, and use glass granules shot blasting with pickling, falls into oblivion, and scrubs and polishing.
Claims (3)
1. the ball valve of a full welding valve body, it is characterized in that, comprise foot rest (1), middle valve body (2), right valve barrel (3), straight pin (4), liner plate (5), the first socket head screw (6), the one O RunddichtringO (7), tie-plate (8), the 2nd O RunddichtringO (9), the 3rd O RunddichtringO (10), valve rod (11), the second socket head screw (12), gland (13), the 4th O RunddichtringO (14), pad (15), static spring (16), valve seat bearing ring (17), spring (18), the 5th O RunddichtringO (19), valve seat (20), left valve barrel (21), thrust washer (22), sliding bearing (23), ball valve core (24), foot rest (1) is fixed on middle valve body (2) below by screw attachment, right valve barrel (3) and left valve barrel (21) are fixed by welding in respectively middle valve body (2) left and right sides, ball valve core (24) is fixed and is positioned in the inner spherical cavity forming of middle valve body (2) by liner plate (5), ball valve core (24) and liner plate (5) surface of contact are provided with thrust washer (22) and sliding bearing (23), between liner plate (5) and left valve barrel (21) and right valve barrel (3), by straight pin (4), be fixedly connected with, ball valve core (24) is connected with the inwall of right valve barrel (3) with left valve barrel (21) by the elastic mechanism being comprised of with spring (18) valve seat bearing ring (17), between valve seat bearing ring (17) and left valve barrel (21), between valve seat bearing ring (17) and right valve barrel (3), the 4th O RunddichtringO is all housed, valve rod (11) one end is placed in outside valve body (2) upside and is threaded with rotating disc, the other end is through gland (13), tie-plate (8) also penetrates middle valve body (2) and is connected with the ball valve core (24) of being located at internal cavities, wherein between valve rod (11) lower end and ball valve core (24), be provided with elastic mechanism static spring (16), gland (13) is fixed on tie-plate (8) by the second socket head screw (13), tie-plate (8) is fixed on middle valve body (2) top by the first socket head screw (6), and between gland (13) and valve rod (11), between valve rod (11) and tie-plate (8), between tie-plate (8) and gland (13), be equipped with seal arrangement.
2. the ball valve of a kind of full welding valve body according to claim 1, it is characterized in that, interface position between described middle valve body (2) and left valve barrel (21), between middle valve body (2) and right valve barrel (3) is equipped with " U " type groove, adopts high frequency welding method to carry out welded seal.
3. a welding method for the ball valve of a kind of full welding valve body as claimed in claim 1, is characterized in that, comprises the following steps:
1) product final assemble, by also coordinating with left valve barrel (22), right valve barrel (3) respectively after middle valve body (2) both sides installation seal ring, carries out general assembly clamping;
2) tentatively use spot-welded, test products performance, can carry out the high frequency welding of whole valve body after qualified;
3) before weldering, prepare, 25～35mm place, weldment edge is cleaned clean and wipes surperficial oxide off with acetone with sand papering, and passivation, remove spot welding welding slag;
4) select the high-frequency welder of 100KW, width of induction coil B is 30mm, and variable-frequency power sources is≤2000A that frequency is 100KHz;
5) choosing " U " type groove is weld seam, and welding wire is selected ER50-6 welding wire, and solder flux is selected BNi68CrWB nichrome;
6) nichrome is evenly sprayed to face of weld, and melt under the hot environment of 1100 ℃ of left and right and argon shield, in matrix surface precipitation, form the alloy protecting layer that a layer thickness is about 0.05 μ m, then the welding wire melting in whole lap welding being stitched with high-frequency induction heating power, inductor coil has the space of 5～8mm from solder flux surface, keep tubing welding angular aperture at 4～5 °;
7) after welding treatment, remove oxide on surface and other pollutants, and under the dry condition, blast cleaning is carried out on butt welded seam surface, and use glass granules shot blasting with pickling, falls into oblivion, and scrubs and polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310610759.7A CN103672008A (en) | 2013-11-28 | 2013-11-28 | Ball valve with all-welded valve bodies and welding method of ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310610759.7A CN103672008A (en) | 2013-11-28 | 2013-11-28 | Ball valve with all-welded valve bodies and welding method of ball valve |
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| CN103672008A true CN103672008A (en) | 2014-03-26 |
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| CN201310610759.7A Pending CN103672008A (en) | 2013-11-28 | 2013-11-28 | Ball valve with all-welded valve bodies and welding method of ball valve |
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|---|---|---|---|---|
| CN104955255A (en) * | 2015-05-08 | 2015-09-30 | 刘青建 | Electrostatic eliminator for petroleum pipelines |
| CN105149803A (en) * | 2015-09-25 | 2015-12-16 | 杭州力源发电设备有限公司 | Welding device applied to fully-welded ball valve body and welding technology of welding device |
| CN105290722A (en) * | 2014-05-29 | 2016-02-03 | 爱三工业株式会社 | Fixation method between valve core and valve shaft |
| CN105822826A (en) * | 2016-06-03 | 2016-08-03 | 江苏威尔迪威阀业有限公司 | Pre-detection method for sealing performance and torque of all-welded ball valve with large diameter |
| CN105921871A (en) * | 2016-06-03 | 2016-09-07 | 江苏威尔迪威阀业有限公司 | Integrated molding welding method of large-caliber all-welded ball valve |
| CN106552985A (en) * | 2015-09-29 | 2017-04-05 | 嘉兴五洲阀门有限公司 | A kind of welding procedure of valve neck seat angle welding |
| CN106594350A (en) * | 2017-03-03 | 2017-04-26 | 上海巨良电磁阀制造有限公司 | Knife gate type high-temperature zero-leakage electromagnetic valve |
| CN107489781A (en) * | 2017-09-18 | 2017-12-19 | 江苏诚功阀门科技有限公司 | The assembly technology of fixing ball valve |
| CN108953750A (en) * | 2018-07-10 | 2018-12-07 | 浙江福瑞科流控机械有限公司 | It can the online buried ball valve of welding entirely and its assemble method with pressure for replacing valve rod sealing assembly |
| CN110017383A (en) * | 2019-03-05 | 2019-07-16 | 南通市力沛流体阀业有限公司 | A kind of electric power valve and its welding procedure |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107378403B (en) * | 2014-05-29 | 2019-04-02 | 爱三工业株式会社 | The manufacturing method of engine exhaust gas reflux valve |
| CN105290722A (en) * | 2014-05-29 | 2016-02-03 | 爱三工业株式会社 | Fixation method between valve core and valve shaft |
| CN105290722B (en) * | 2014-05-29 | 2017-09-15 | 爱三工业株式会社 | Fixing means between valve element and valve shaft |
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| CN104955255A (en) * | 2015-05-08 | 2015-09-30 | 刘青建 | Electrostatic eliminator for petroleum pipelines |
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Application publication date: 20140326 |