CN102297278A - Emergency cutoff valve - Google Patents
Emergency cutoff valve Download PDFInfo
- Publication number
- CN102297278A CN102297278A CN 201110221990 CN201110221990A CN102297278A CN 102297278 A CN102297278 A CN 102297278A CN 201110221990 CN201110221990 CN 201110221990 CN 201110221990 A CN201110221990 A CN 201110221990A CN 102297278 A CN102297278 A CN 102297278A
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- electromagnet
- vertical channel
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- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 244000273618 Sphenoclea zeylanica Species 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The invention relates to an emergency cutoff valve which comprises a valve body, a valve clack and a valve cover, wherein the valve clack is a piston type valve clack, an left vertical channel is arranged on the upper left part of the valve body and communicated with a left cavity; the left part of the valve cover is provided with a left invert U-shaped channel of which the right port is communicated with an upper left cavity, the left port of the left invert U-shaped channel is communicated with the left vertical channel, and a left one-way valve is arranged on the left vertical channel; the upper right part of the valve body is provided with a right vertical channel which is communicated with a right cavity, and the right part of the valve cover is provided with a right invert U-shaped channel of which the left port is communicated with an upper cavity; the right port of the right invert U-shaped channel is communicated with the right vertical channel, and the right vertical channel is provided with a right one-way valve; the centre of the valve clack is provided with a pilot hole, and the upper part of the valve cover is provided with a low pressure electromagnetic type expansion link device; and the expansion link of the low pressure electromagnetic type expansion link passes through the valve cover and extrudes into the upper cavity, and an expansion link and the valve cover are in sliding fit and sealed with fluid and the lower end part of the expansion link is provided with a pilot head which is matched with the pilot hole.
Description
Technical field
The present invention relates to a kind of stop valve, as long as especially a kind of Emergeny Cutoff Valves of under experience emergency episode situation, cutting off the electricity supply and just can close automatically.
Background technique
At present, stop valve is divided into hand stop valve and Electric Actuated Stop Valves two big classes substantially.When particularly the pipeline that is communicated with of fuel oil depot or fuel air reservoir meets with emergency episode and needs pipe valve on the emergency cut-off pipeline with the fluid storehouse, hand stop valve operate the effort time-consuming, the people may not can be close in some cases, hand stop valve can't in time be closed, hide some dangers for to accident treatment, even may increase the weight of the harm of accident; Anti-explosion motor starts Electric Actuated Stop Valves and inevitably can produce electrical spark, even if also can not be avoided the generation of electrical spark fully; Moreover when handling fuel oil, gas accidents, in order to prevent generally at first to cut off the electricity supply because of fuel oil, gas explosion that circuit may cause, this moment, Electric Actuated Stop Valves can't move at all, and cut-out accident pipeline can't be realized.The accident that causes owing to above reason enlarges, and happens occasionally.Therefore, as long as design is a kind of meeting with the Emergeny Cutoff Valves of cutting off the electricity supply and just can close automatically under the emergency episode situation, be the present technical issues that need to address.
Summary of the invention
As long as technical problem to be solved by this invention provides a kind of Emergeny Cutoff Valves of cutting off the electricity supply and just can close automatically under experience emergency episode situation.
The technological scheme that the present invention solves its technical problem is:
Emergeny Cutoff Valves, comprise valve body, flap and valve gap, flap is divided into left chamber, right chamber and epicoele with the valve pocket of valve body, described flap is the piston type flap, the sidewall of flap cooperates with the epicoele slipper seal, and the upper left quarter valve body of valve body is provided with the left Vertical Channel that is communicated with left chamber, and the left part valve gap of valve gap is provided with " U " type passage of a right mouthful of left side that is communicated with upper left chamber, the a left side Zuo Kou of " U " type passage is communicated with left Vertical Channel, and left Vertical Channel is provided with left one-way valve; The upper right quarter valve body of valve body is provided with the right Vertical Channel that is communicated with right chamber, the right part valve gap of valve gap is provided with " U " type passage of a mouthful right side that is communicated with epicoele, a left side, the right You Kou of " U " type passage is communicated with right Vertical Channel, right Vertical Channel is provided with right one-way valve, center at flap offers pilot hole, be provided with low tension magnetic-type flexible rod device on the top of valve gap, the flexible rod of low tension magnetic-type flexible rod passes valve gap and puts in the epicoele, flexible rod and valve gap slip fluid-tight, be provided with the pilot head of mating with pilot hole in the underpart of flexible rod, under the normal working, low tension magnetic-type flexible rod device gets, the flexible rod retraction, pilot head and pilot hole break away from mated condition, and the fluid that enters epicoele from left chamber through left one-way valve enters right chamber through pilot hole, epicoele can not form pressure, chamber, left side fluid is with flap jack-up, and left chamber is communicated with right chamber, and Emergeny Cutoff Valves is on state; When the chance emergency episode is cut off the electricity supply, low tension magnetic-type flexible rod device dead electricity, flexible rod stretches out, pilot head sealing pilot hole, flap seals the passage between left chamber and the right chamber simultaneously, the fluid that enters epicoele through left one-way valve from left chamber can not enter right chamber through pilot hole, because the compression area on flap top is greater than the bottom compression area, flap firmly seals the passage between left chamber and the right chamber; As special circumstances, right cavity pressure is during greater than left cavity pressure, and fluid enters epicoele with right one-way valve, and the passage between left chamber and the right chamber is still firmly sealed by flap, can not open.
Preferably, described low tension magnetic-type flexible rod device comprises the tubulose electromagnet, be inverted tubbiness electromagnet fixed body and electromagnet fixed body hush panel, described valve gap middle part is porose, the electromagnet fixed body is arranged on the top of valve body by electromagnet fixed body hush panel, the hole sealing and fixing at electromagnet fixed body hush panel and valve gap middle part, the tubulose electromagnet is fixed on the bucket end internal surface of being inverted tubbiness electromagnet fixed body, be coated with pull bar in the tubulose electromagnet, pull bar passes barrel end stretch outside bucket, upper end portion at pull bar is provided with handle, on pull bar, be fixed with plate-like armature, the diameter of armature is greater than the diameter of tubulose electromagnet, be fixed with the armature return spring at armature and described bucket at the end, the electromagnetic force of tubulose electromagnet is greater than the elastic force of armature return spring, the underpart of pull bar has outside thread, on pull bar, be set with conical surface T-shape bracer down, there is outside thread the underpart of T-shape bracer, described flexible rod is a hollow stem, there is the internal thread with the outside thread of T-shape bracer underpart coupling the upper end portion of hollow stem, pull bar is connected with flexible rod by the T-shape bracer, outer cover at the T-shape bracer is equipped with steel ball sleeve, steel ball sleeve and electromagnet fixed body hush panel are fixed, on steel ball sleeve, offer a plurality of steel balls hole, in the steel ball hole, be placed with steel ball, the diameter of steel ball is greater than the wall thickness of steel ball sleeve, outer cover at steel ball sleeve is equipped with the steel ball overcoat, the internal diameter on steel ball overcoat top is greater than the internal diameter of bottom, the cover plate that the band center hole is arranged in the roof anchorage of steel ball overcoat, described cover plate is arranged on the top of T-shape bracer, the center hole and the pull bar of described cover plate are slidingly matched, on flexible rod, be set with guide's spring, guide's spring is arranged between pilot head and the electromagnet fixed body hush panel, the tubulose electromagnet gets under the normal working, the pulling pull bar, pull bar drives flexible rod and the steel ball overcoat moves upward, the armature adhesive, armature return spring and guide's spring are compressed, pilot head and pilot hole break away from mated condition, because steel ball overcoat bottom internal diameter is less than the top internal diameter, steel ball moves inward under the effect of steel ball overcoat, the interior hemisphere of steel ball enters in the steel ball sleeve, the T-shape bracer is blocked by steel ball, even if the elastic force of guide's spring is much larger than the electromagnetic force of tubulose electromagnet, pull bar and flexible rod can not move downward, when the chance emergency episode is cut off the electricity supply, tubulose electromagnet dead electricity, armature is released, armature drives the steel ball overcoat and moves downward under the elastic force effect of armature return spring, when steel ball is in the steel ball overcoat than the major diameter place, formerly under the elastic force effect of guided missile spring, the T-shape bracer is extruded steel ball, pull bar and flexible rod move down rapidly, pilot head sealing pilot hole, at this moment, flap seals the passage between left chamber and the right chamber, the fluid that enters epicoele through left one-way valve from left chamber can not enter right chamber through pilot hole, because the compression area on flap top is greater than the bottom compression area, flap firmly seals the passage between left chamber and the right chamber; As special circumstances, right cavity pressure is during greater than left cavity pressure, and fluid enters epicoele with right one-way valve, passage between chamber, a left side and the right chamber is still firmly sealed by flap, can not open, realization low voltage small power electric magnet is controlled the purpose of big stop valve, meets national safety standard.
Preferably, opening outside the lateral part of left Vertical Channel is provided with a left side, falling the top of " U " type passage on a left side is provided with upper left opening, and the outer opening in a left side is communicated with by pipeline with upper left opening, and the pipeline between upper left opening and the left outer opening is provided with low-voltage solenoid valve and left standby one-way valve.
Preferably, stud with cylinder sleeve on the inwall of epicoele, the sidewall of described flap cooperates with the cylinder sleeve slipper seal.
Preferably, on the passage of right chamber and epicoele, stud with seal ring, on the lower surface of flap, be inlaid with O RunddichtringO with the seal ring coupling.
Preferably, described low pressure is 36V voltage or 24V voltage.
Compared with prior art, the present invention avoids accident to take place or expansion because employing outage cut-out technology is cut off rapidly.Chamber, a no human relations left side, right chamber all can reach outage fast shut-off purpose as entering the chamber, and have what variation all can't make the conducting of emergency cut-off opening of valves into and out of the mutual pressure reduction of cavity pressure; Use the present invention can prevent accident expansion even can avoid accident to take place.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Emergeny Cutoff Valves, comprise valve body 1, flap 4 and valve gap 7, flap 4 is divided into left chamber, right chamber and epicoele with the valve pocket of valve body 1, described flap 4 is the piston type flap, the sidewall of flap 4 cooperates with the epicoele slipper seal, the upper left quarter valve body of valve body 1 is provided with the left Vertical Channel that is communicated with left chamber, the left part valve gap of valve gap 7 is provided with " U " type passage of a right mouthful of left side that is communicated with upper left chamber, the a left side Zuo Kou of " U " type passage is communicated with left Vertical Channel, and left Vertical Channel is provided with left one-way valve 24; The upper right quarter valve body of valve body 1 is provided with the right Vertical Channel that is communicated with right chamber, the right part valve gap of valve gap 7 is provided with " U " type passage of a mouthful right side that is communicated with epicoele, a left side, the right You Kou of " U " type passage is communicated with right Vertical Channel, right Vertical Channel is provided with right one-way valve 6, offer pilot hole 27 at the center of flap 4, be provided with low tension magnetic-type flexible rod device on the top of valve gap 7, the flexible rod 9 of low tension magnetic-type flexible rod passes valve gap 7 and puts in the epicoele, flexible rod 9 and valve gap 7 slip fluid-tight are provided with the pilot head 25 of mating with pilot hole 27 in the underpart of flexible rod 9.
Described low tension magnetic-type flexible rod device comprises tubulose electromagnet 14, be inverted tubbiness electromagnet fixed body 15 and electromagnet fixed body hush panel 8, described valve gap 7 middle parts are porose, electromagnet fixed body 15 is arranged on the top of valve body 1 by electromagnet fixed body hush panel 8, the hole sealing and fixing at electromagnet fixed body hush panel 8 and valve gap 7 middle parts, tubulose electromagnet 14 is fixed on the bucket end internal surface of being inverted tubbiness electromagnet fixed body 15, be coated with pull bar 17 in the tubulose electromagnet 14, pull bar 17 passes barrel end stretch outside bucket, upper end portion at pull bar 17 is provided with handle, on pull bar 17, be fixed with plate-like armature 18, the diameter of armature 18 is greater than the diameter of tubulose electromagnet 14, be fixed with armature return spring 12 at armature 18 and described bucket at the end, the electromagnetic force of tubulose electromagnet 14 is greater than the elastic force of armature return spring 12, the underpart of pull bar 17 has outside thread, on pull bar 17, be set with conical surface T-shape bracer 11 down, there is outside thread the underpart of T-shape bracer 11, described flexible rod 9 is a hollow stem, there is the internal thread with the outside thread of T-shape bracer 11 underparts coupling the upper end portion of hollow stem, pull bar 17 is connected with flexible rod 9 by T-shape bracer 11, outer cover at T-shape bracer 11 is equipped with steel ball sleeve 21, steel ball sleeve 21 is fixing with electromagnet fixed body hush panel 8, on steel ball sleeve 21, offer a plurality of steel balls hole, in the steel ball hole, be placed with steel ball 19, the diameter of steel ball 19 is greater than the wall thickness of steel ball sleeve 21, outer cover at steel ball sleeve 21 is equipped with steel ball overcoat 20, the internal diameter on steel ball overcoat 20 tops is greater than the internal diameter of bottom, the cover plate that the band center hole is arranged in the roof anchorage of steel ball overcoat 20, described cover plate is arranged on the top of T-shape bracer 11, the center hole of described cover plate and pull bar 17 are slidingly matched, be set with guide's spring 26 on flexible rod 9, guide's spring 26 is arranged between pilot head 25 and the electromagnet fixed body hush panel 8.
Opening outside the lateral part of left Vertical Channel is provided with a left side, falling the top of " U " type passage on a left side is provided with upper left opening, the outer opening in a left side is communicated with by pipeline with upper left opening, and the pipeline between the outer opening of a upper left opening and a left side is provided with low-voltage solenoid valve 22 and left standby one-way valve 23.
On the passage of right chamber and epicoele, stud with seal ring 2, on the lower surface of flap 4, be inlaid with O RunddichtringO 3 with seal ring 2 couplings.
Stud with cylinder sleeve 5 on the inwall of epicoele, the sidewall of described flap 4 cooperates with cylinder sleeve 5 slipper seals.
Described low pressure is 36V voltage or 24V voltage.
Claims (6)
1. Emergeny Cutoff Valves, comprise valve body (1), flap (4) and valve gap (7), flap (4) is divided into left chamber with the valve pocket of valve body (1), right chamber and epicoele, it is characterized in that: described flap (4) is the piston type flap, the sidewall of flap (4) cooperates with the epicoele slipper seal, the upper left quarter valve body of valve body (1) is provided with the left Vertical Channel that is communicated with left chamber, the left part valve gap of valve gap (7) is provided with " U " type passage of a right mouthful of left side that is communicated with upper left chamber, the a left side Zuo Kou of " U " type passage is communicated with left Vertical Channel, and left Vertical Channel is provided with left one-way valve (24); The upper right quarter valve body of valve body (1) is provided with the right Vertical Channel that is communicated with right chamber, the right part valve gap of valve gap (7) is provided with " U " type passage of a mouthful right side that is communicated with epicoele, a left side, the right You Kou of " U " type passage is communicated with right Vertical Channel, right Vertical Channel is provided with right one-way valve (6), offer pilot hole (27) at the center of flap (4), be provided with low tension magnetic-type flexible rod device on the top of valve gap (7), the flexible rod (9) of low tension magnetic-type flexible rod passes valve gap (7) and puts in the epicoele, flexible rod (9) and valve gap (7) slip fluid-tight are provided with the pilot head (25) of mating with pilot hole (27) in the underpart of flexible rod (9).
2. Emergeny Cutoff Valves according to claim 1, it is characterized in that: described low tension magnetic-type flexible rod device comprises tubulose electromagnet (14), be inverted tubbiness electromagnet fixed body (15) and electromagnet fixed body hush panel (8), described valve gap (7) middle part is porose, electromagnet fixed body (15) is arranged on the top of valve body (1) by electromagnet fixed body hush panel (8), the hole sealing and fixing at electromagnet fixed body hush panel (8) and valve gap (7) middle part, tubulose electromagnet (14) is fixed on the bucket end internal surface of being inverted tubbiness electromagnet fixed body (15), be coated with pull bar (17) in the tubulose electromagnet (14), pull bar (17) passes barrel end stretch outside bucket, upper end portion at pull bar (17) is provided with handle, on pull bar (17), be fixed with plate-like armature (18), the diameter of armature (18) is greater than the diameter of tubulose electromagnet (14), be fixed with armature return spring (12) at armature (18) and described bucket at the end, the electromagnetic force of tubulose electromagnet (14) is greater than the elastic force of armature return spring (12), the underpart of pull bar (17) has outside thread, on pull bar (17), be set with conical surface T-shape bracer (11) down, there is outside thread the underpart of T-shape bracer (11), described flexible rod (9) is a hollow stem, there is the internal thread with the outside thread of T-shape bracer (11) underpart coupling the upper end portion of hollow stem, pull bar (17) is connected with flexible rod (9) by T-shape bracer (11), outer cover at T-shape bracer (11) is equipped with steel ball sleeve (21), steel ball sleeve (21) is fixing with electromagnet fixed body hush panel (8), on steel ball sleeve (21), offer a plurality of steel balls hole, in the steel ball hole, be placed with steel ball (19), the diameter of steel ball (19) is greater than the wall thickness of steel ball sleeve (21), outer cover at steel ball sleeve (21) is equipped with steel ball overcoat (20), the internal diameter on steel ball overcoat (20) top is greater than the internal diameter of bottom, the cover plate that the band center hole is arranged in the roof anchorage of steel ball overcoat (20), described cover plate is arranged on the top of T-shape bracer (11), the center hole of described cover plate and pull bar (17) are slidingly matched, be set with guide's spring (26) on flexible rod (9), guide's spring (26) is arranged between pilot head (25) and the electromagnet fixed body hush panel (8).
3. Emergeny Cutoff Valves according to claim 1 and 2, it is characterized in that: opening outside the lateral part of left Vertical Channel is provided with a left side, falling the top of " U " type passage on a left side is provided with upper left opening, the outer opening in a left side is communicated with by pipeline with upper left opening, and the pipeline between the outer opening of a upper left opening and a left side is provided with low-voltage solenoid valve (22) and left standby one-way valve (23).
4. Emergeny Cutoff Valves according to claim 1 and 2 is characterized in that: stud with cylinder sleeve (5) on the inwall of epicoele, the sidewall of described flap (4) cooperates with cylinder sleeve (5) slipper seal.
5. Emergeny Cutoff Valves according to claim 1 and 2 is characterized in that: stud with seal ring (2) on the passage of right chamber and epicoele, be inlaid with the O RunddichtringO (3) with seal ring (2) coupling on the lower surface of flap (4).
6. Emergeny Cutoff Valves according to claim 1 and 2 is characterized in that: described low pressure is 36V voltage or 24V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110221990A CN102297278B (en) | 2011-08-04 | 2011-08-04 | Emergency cutoff valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110221990A CN102297278B (en) | 2011-08-04 | 2011-08-04 | Emergency cutoff valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297278A true CN102297278A (en) | 2011-12-28 |
| CN102297278B CN102297278B (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110221990A Expired - Fee Related CN102297278B (en) | 2011-08-04 | 2011-08-04 | Emergency cutoff valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297278B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074983A (en) * | 2013-03-25 | 2014-10-01 | 挺宇集团有限公司 | A self-operated bidirectional fast stop valve |
| CN104832656A (en) * | 2015-04-02 | 2015-08-12 | 广州市禹成消防科技有限公司 | Filtering floating type electromagnetic valve structure for fire water supply |
| CN106090369A (en) * | 2016-08-26 | 2016-11-09 | 天津市国威给排水设备制造有限公司 | A kind of piloted reducer |
| CN107725786A (en) * | 2017-09-29 | 2018-02-23 | 宁波捷尔天电气有限公司 | A kind of safe pilot solenoid valve |
| CN107969140A (en) * | 2015-09-07 | 2018-04-27 | Ｋｙｂ株式会社 | unidirectional flow control valve |
| CN108223816A (en) * | 2017-11-14 | 2018-06-29 | 张连生 | A kind of hydraulic-driven pilot-operated type quick action emergency valve |
| CN112303244A (en) * | 2019-08-02 | 2021-02-02 | 威腾阀门有限公司 | Speed regulation type electromagnetic valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050173665A1 (en) * | 2004-02-05 | 2005-08-11 | Kemp Willard E. | Ball valve having annular spring seats |
| CN101718348A (en) * | 2010-01-22 | 2010-06-02 | 杭州前进齿轮箱集团股份有限公司 | Electromagnetic and hydraulic memory valve |
| CN201779321U (en) * | 2010-09-06 | 2011-03-30 | 杨叶 | High-pressure pneumatic emergency shutoff valve |
| CN202158204U (en) * | 2011-08-04 | 2012-03-07 | 张连生 | Emergency stop valve |
-
2011
- 2011-08-04 CN CN201110221990A patent/CN102297278B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050173665A1 (en) * | 2004-02-05 | 2005-08-11 | Kemp Willard E. | Ball valve having annular spring seats |
| CN101718348A (en) * | 2010-01-22 | 2010-06-02 | 杭州前进齿轮箱集团股份有限公司 | Electromagnetic and hydraulic memory valve |
| CN201779321U (en) * | 2010-09-06 | 2011-03-30 | 杨叶 | High-pressure pneumatic emergency shutoff valve |
| CN202158204U (en) * | 2011-08-04 | 2012-03-07 | 张连生 | Emergency stop valve |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074983A (en) * | 2013-03-25 | 2014-10-01 | 挺宇集团有限公司 | A self-operated bidirectional fast stop valve |
| CN104074983B (en) * | 2013-03-25 | 2016-04-06 | 浙江挺宇流体设备股份有限公司 | The two-way repid cut-off valve of self-powering type |
| CN104832656A (en) * | 2015-04-02 | 2015-08-12 | 广州市禹成消防科技有限公司 | Filtering floating type electromagnetic valve structure for fire water supply |
| CN107969140A (en) * | 2015-09-07 | 2018-04-27 | Ｋｙｂ株式会社 | unidirectional flow control valve |
| CN106090369A (en) * | 2016-08-26 | 2016-11-09 | 天津市国威给排水设备制造有限公司 | A kind of piloted reducer |
| CN107725786A (en) * | 2017-09-29 | 2018-02-23 | 宁波捷尔天电气有限公司 | A kind of safe pilot solenoid valve |
| CN107725786B (en) * | 2017-09-29 | 2024-04-26 | 宁波捷尔天电气有限公司 | Safe pilot electromagnetic valve |
| CN108223816A (en) * | 2017-11-14 | 2018-06-29 | 张连生 | A kind of hydraulic-driven pilot-operated type quick action emergency valve |
| CN108223816B (en) * | 2017-11-14 | 2024-03-26 | 张连生 | Hydraulic drive pilot type emergency cut-off valve |
| CN112303244A (en) * | 2019-08-02 | 2021-02-02 | 威腾阀门有限公司 | Speed regulation type electromagnetic valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102297278B (en) | 2012-09-26 |
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Granted publication date: 20120926 |