CN102537392B - Pilot operated gate valve - Google Patents
Pilot operated gate valve Download PDFInfo
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- CN102537392B CN102537392B CN2012100564486A CN201210056448A CN102537392B CN 102537392 B CN102537392 B CN 102537392B CN 2012100564486 A CN2012100564486 A CN 2012100564486A CN 201210056448 A CN201210056448 A CN 201210056448A CN 102537392 B CN102537392 B CN 102537392B
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- valve
- flashboard
- little
- big
- valve seat
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Abstract
The invention discloses a pilot operated gate valve, which adopts an ordinary gate valve structure including as a valve body, a gate plate, a valve seat, a valve cap and a valve rod, wherein the gate plate is a pressure balancing gate plate assembly that includes a small gate plate bracket, a big gate plate, a small valve seat, a balancing gate plate, a seal ring and pins for connecting all the components. The small gate plate bracket can be driven to move upward or downward by rotating the hand wheel, so as to balance the pressure at the two ends of the valve, and then reduce the torque for opening; and the big gate plate can be driven to move upward or downward by continuing rotating the hand wheel, so as to open or close the valve. The pilot operated gate valve has the advantages of small operating torque, small size, long service life and low cost.
Description
Technical field
The present invention relates to a kind of gate valve, particularly a kind of pilot operated gate valve of being combined by pressure balancing structure and common gate valve.
Background technique
Common valve entrance point and outlet end when switch have certain pressure reduction, and pressure reduction is larger under hyperbaric environment.
In the gate valve of heavy caliber high pressure power specification, for can switch, adopt gear box structure, screw structure, add the balancing pole structure and come province to reduce operational torque, or adopt and drive flashboard at hydraulic pressure and pneumatic cylinder and move, realize the switch purpose.No matter be to adopt above-mentioned the sort of structure itself the friction between flashboard and the valve seat not to be reduced.And the valve of said structure also has following shortcoming: volume is large, and the wearing and tearing of flashboard valve seat are many, and stem diameter is large, and valve is short working life, and cost is higher.
Summary of the invention
Goal of the invention of the present invention is in order to overcome the shortcoming in the above-mentioned background technology, a kind of pilot operated gate valve of heavy caliber high pressure power specification to be provided.
Technological scheme of the present invention is: a kind of pilot operated gate valve, comprise valve body, flashboard, valve seat, valve gap, the common common gate valve structure such as valve rod, wherein said flashboard is the pressure balance flashboard assembly, this assembly comprises little flashboard frame, big damper, little valve seat, the balance flashboard, seal ring and the pin that connects each member, its medium and small flashboard chord position is in the neutral position, little flashboard frame is provided with valve-rod cavity, respectively be provided with the flashboard passage about little flashboard frame, two balance flashboards can move forward and backward by this flashboard passage, before and after the little flashboard frame peace weighlock plate and about also symmetrically be provided with successively little valve seat, big sealing ring, small sealing ring, big damper, big damper is provided with the valve seat mouth, little valve seat, big sealing ring, small sealing ring is located on this valve seat mouth, and the import and export through hole joint of former and later two big dampers also is provided with O type circle.
The invention has the beneficial effects as follows: by forwarding handwheel to, can drive first little flashboard frame and move up or down, can make valve pressure at two ends balance, thereby reduce the moment of torsion of opening.Then continue to forward to handwheel, can drive big damper and move up or down, thereby open or throttle down.The present invention has that operational torque is little, and volume is little, long service life, the advantage that cost is few.
Description of drawings
Fig. 1 is this pilot operated gate valve example structure figure;
Fig. 2 is the A-A face sectional view of Fig. 1;
Fig. 3 is the External view of pressure balance flashboard assembly;
Fig. 4 is the A-A face sectional view of Fig. 3;
Fig. 5 is the B-B face sectional view of Fig. 3;
Fig. 6 is the C-C face sectional view of Fig. 3;
Fig. 7 is the G-G face sectional view of Fig. 3;
Fig. 8 is the pilot operated gate valve exploded view;
Wherein: 1, valve body, 2, flashboard assembly, 3, valve rod, 4, valve gap, 5, valve seat, 6 dunnages, 21, little flashboard frame, 22, big damper, 23, O type circle, 24, pin, 25, little valve seat, 26, the balance flashboard, 27, big sealing ring, 28, small sealing ring.
Embodiment
Pilot operated gate valve as shown in Figure 1 comprises the common common gate valve structures such as valve body (1), flashboard, valve seat (5), valve gap (4), valve rod (3), dunnage (6), and wherein said flashboard is pressure balance flashboard assembly (2).This flashboard assembly such as Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Figure 8 shows that symmetric design, comprise little flashboard frame (21), big damper (22), little valve seat (25), balance flashboard (26), seal ring and the pin (24) that connects each member, its medium and small flashboard chord position is in the neutral position, little flashboard frame is provided with valve-rod cavity, respectively be provided with the flashboard passage about little flashboard frame, two balance flashboards can move forward and backward by this flashboard passage, before and after the little flashboard frame peace weighlock plate and about also symmetrically be provided with successively little valve seat, big sealing ring, small sealing ring, big damper, big damper is provided with the valve seat mouth, little valve seat, big sealing ring, small sealing ring is located on this valve seat mouth, and the import and export through hole joint of former and later two big dampers also is provided with O type circle.
The working principle of this pilot operated gate valve is:
1, opens gate valve: rotate counterclockwise handwheel → band ovable valve stem and rotate counterclockwise → drive the little flashboard frame little flashboard that moves up → drive and be moved upward to open position → continue to rotate counterclockwise handwheel → drive big damper to be moved upward to open position.
2, closing gate valve: clockwise rotate handwheel → band ovable valve stem and clockwise rotate → drive little flashboard frame and move down → drive little flashboard and be moved downward to closed position → continue to clockwise rotate handwheel → drive big damper to the little closed position that moves to.
Claims (1)
1. pilot operated gate valve, comprise valve body, flashboard, valve seat, valve gap and valve rod, it is characterized in that: described flashboard is the pressure balance flashboard assembly, this assembly comprises little flashboard frame, big damper, little valve seat, the balance flashboard, seal ring and the pin that connects each member, its medium and small flashboard chord position is in the neutral position, little flashboard frame is provided with valve-rod cavity, respectively be provided with the flashboard passage about little flashboard frame, two balance flashboards can move forward and backward by this flashboard passage, also symmetrically before and after the little flashboard frame peace weighlock plate be provided with successively little valve seat, big sealing ring, small sealing ring, big damper, big damper is provided with the valve seat mouth, little valve seat, big sealing ring, small sealing ring is located on this valve seat mouth, and the import and export through hole joint of former and later two big dampers also is provided with o type circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100564486A CN102537392B (en) | 2012-03-06 | 2012-03-06 | Pilot operated gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100564486A CN102537392B (en) | 2012-03-06 | 2012-03-06 | Pilot operated gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537392A CN102537392A (en) | 2012-07-04 |
| CN102537392B true CN102537392B (en) | 2013-03-20 |
Family
ID=46345027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100564486A Active CN102537392B (en) | 2012-03-06 | 2012-03-06 | Pilot operated gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102537392B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900858B (en) * | 2012-10-19 | 2014-02-05 | 浙江美德机械有限公司 | Pressure relief type pipeline quick opening and closing device |
| CN103644315B (en) * | 2013-12-04 | 2016-02-17 | 淮北新祥液压机电成套设备制造有限公司 | A kind of long-life knife gate valve |
| CN104534114B (en) * | 2015-01-26 | 2017-08-01 | 浙江德卡控制阀仪表有限公司 | The two-way double disc high pressure sluice valve of pilot-operated type |
| WO2019019127A1 (en) * | 2017-07-28 | 2019-01-31 | 江苏政轩石油机械股份有限公司 | Combined low-torque flat gate valve |
| CN111022675A (en) * | 2019-12-22 | 2020-04-17 | 江苏政轩石油机械股份有限公司 | High-pressure large-drift-diameter small-torque manual flat valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166879C (en) * | 2001-12-11 | 2004-09-15 | 哈尔滨工程大学 | Magnetic gate valve boosted by liquid pressure difference |
| CN201028020Y (en) * | 2007-05-24 | 2008-02-27 | 朱力艳 | Pilot-operated high-pressure sluice valve |
| CH700776A2 (en) * | 2009-04-02 | 2010-10-15 | Sistag Absperrtechnik | Slide valves, in particular leading to the closing of a media line. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202469034U (en) * | 2012-03-06 | 2012-10-03 | 苏州道森钻采设备股份有限公司 | Pilot-operated gate valve |
-
2012
- 2012-03-06 CN CN2012100564486A patent/CN102537392B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166879C (en) * | 2001-12-11 | 2004-09-15 | 哈尔滨工程大学 | Magnetic gate valve boosted by liquid pressure difference |
| CN201028020Y (en) * | 2007-05-24 | 2008-02-27 | 朱力艳 | Pilot-operated high-pressure sluice valve |
| CH700776A2 (en) * | 2009-04-02 | 2010-10-15 | Sistag Absperrtechnik | Slide valves, in particular leading to the closing of a media line. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102537392A (en) | 2012-07-04 |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230313 Address after: No. 16, Xihenggang Street, Yangchenghu Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Dawson Drilling and Production Equipment Co.,Ltd. Address before: 215137 Xingtai Road, Taiping Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: SUZHOU DOUSON DRILLING & PRODUCTION EQUIPMENT Co.,Ltd. |