CN103672130A - Deepwater underwater brake valve hydraulic driver - Google Patents
Deepwater underwater brake valve hydraulic driver Download PDFInfo
- Publication number
- CN103672130A CN103672130A CN201310697859.8A CN201310697859A CN103672130A CN 103672130 A CN103672130 A CN 103672130A CN 201310697859 A CN201310697859 A CN 201310697859A CN 103672130 A CN103672130 A CN 103672130A
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- Prior art keywords
- valve
- cylinder body
- rod
- piston
- seal chamber
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Classifications
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
- F16K31/143—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves the fluid acting on a piston
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention provides a deepwater underwater brake valve hydraulic driver which comprises a valve deck and a valve rod. The valve deck and the valve rod are connected to a brake valve body. The driver further comprises a cylinder body, a shell body, a piston, a supporting seat, and a compression elastic piece. The cylinder body and the shell body are sequentially connected in a sealing mode. A first sealing cavity is formed between the cylinder body and the valve deck. A second sealing cavity is formed between the shell body and the cylinder body. The valve rod is inserted into the first sealing cavity. The piston is arranged in the first sealing cavity and divides the first sealing cavity into an upper sealing cavity and a lower sealing cavity vertically. A hydraulic source inlet enabling the upper sealing cavity to be communicated with the outside is formed in the cylinder body. The piston is fixedly connected with the valve rod. A piston rod of the piston penetrates through the cylinder body, enters the second sealing cavity body and is connected, through threads, with an operation rod movably penetrating through a top cover. The supporting seat is arranged on the second sealing cavity. The operation rod is arranged on the supporting seat through a bearing. The compression elastic piece is connected between the supporting seat and the cylinder body. The deepwater underwater brake valve hydraulic driver can be used for hydraulically driving a brake valve under deepwater, has the opening degree indication function, and can also drive a brake valve through mechanical operation.
Description
Technical field
The present invention relates to a kind of gate valve hydraulic unit driver, especially relate to a kind of gate valve hydraulic unit driver that both can also can adopt mechanical control system to operate by hydraulic operation for producing under water.
Background technique
Various types of valves are used to oil field prospecting, drilling well and the oil and natural gas manufacturing mechanism of oil field.Valve is generally used for the fluid in switching pipeline.The sealing of valve mainly contains two way sealed and two kinds of canonical forms of one-way sealing.The common two ends of plate valve have symmetrical outlet and entrance, centre to have the seal chamber that can move up and down for flashboard to close and open valve.Drive the mode of ram movement opening and closing gate valve generally to have manually-operable, hydraulic operation, pneumatic operation, electric operating etc.
Be accompanied by petering out of land oil gas field, the mankind have started the exploration of marine oil and gas.The oil and gas reserves that has now proved ocean is huge, and has used offshore platform drilling well to produce bulk petroleum and rock gas.But deep-sea offshore oil and natural gas extraction cannot adopt platform-type exploitation technology, adopt floating probing and manufacturing mechanism can exploit the more oil in territory, deep-sea, but need to be equipped with the equipment such as underwater well head, subsea production tree, subsea manifold.The production that needs the gate valve under water of hydraulic control driver drives to close and open petroleum gas on these equipment.
Summary of the invention
In order to overcome the defect of prior art, the object of this invention is to provide a kind of for operating the deep water hydraulic unit driver of plate valve under water.
In order to achieve the above object, the invention provides a kind of deep water gate valve hydraulic unit driver under water, comprise that the valve gap, the lower end that are connected on gate valve body are connected to the valve rod on flashboard for sluice valve, it is characterized in that: described valve rod can move up and down to be located in described valve gap and with described valve bonnet seal and be connected, and described deep water under water gate valve hydraulic unit driver also comprises:
Cylinder body, it is sealedly connected on described valve gap, between described cylinder body and described valve gap, forms the first seal chamber, and insert in described the first seal chamber the upper end of described valve rod;
Housing, it is sealedly connected on described cylinder body, and the upper end of described housing is sealedly connected with top cover, between described top cover, described housing and described cylinder body, forms the second seal chamber;
Piston, it can move up and down and be arranged in described the first seal chamber, the sidewall of described piston and described cylinder body is tightly connected described the first seal chamber is divided into upper seal chamber and lower seal cavity up and down, and described cylinder body is provided with the hydraulic power import that described upper seal chamber is in communication with the outside; Described piston is fixedly connected with the upper end of described valve rod, and the top of described piston has and can through described cylinder body, enter the piston rod of described the second seal chamber with moving up and down, between described piston rod and described cylinder body, is tightly connected;
Operating stem, its can move up and down and can along self axial rotation be arranged in described the second seal chamber, its top movable is through described top cover and be connected with described top seal, its underpart is threaded with the top of described piston rod;
Bearing, it can move up and down and be located at the top of described the second seal chamber, described operating stem by bearing can along self axial rotation be arranged on described bearing;
Compression elastic piece, it is connected between described bearing and described cylinder body.
Preferably, be also installed with positioning block on described piston rod, described positioning block is positioned at the top of described cylinder body.
More preferably, described positioning block is positioning ring, and the distance between the lower end surface of described positioning ring and the upper-end surface of described cylinder body equals the stroke of flashboard for sluice valve; Described positioning ring is threaded on described piston rod and by the screw radially arranging and is fixedly connected with described piston rod, and described piston rod top surpasses described positioning ring and the length of the part that is threaded with described operating stem is greater than the stroke of flashboard for sluice valve.
Further, on described valve gap, there is the endoporus passing for described valve handle activity, between the outer circumferential face of described valve rod and the endoporus of described valve gap, be provided with stem packing, between described valve rod and described stem packing, form motive sealing; The top of described stem packing is also installed with Gland, described valve rod is through the endoporus of described Gland, between the endoporus of described Gland and described valve gap, be provided with O RunddichtringO, between the endoporus of described Gland and the outer circumferential face of described valve rod, by seal ring, form motive sealing, between described stem packing, described O RunddichtringO and described seal ring, form a confined space; On described valve gap, be also provided with the relief hole being connected with described confined space.
Preferably, on described valve gap, be also provided with the one-way valve being connected with gate valve valve pocket.
Preferably, between described valve gap and the end face of described cylinder body, by O RunddichtringO, be tightly connected.
Preferably, between the outer circumferential face of described piston and the sidewall of described cylinder body, be provided with piston packing ring and form motive sealing.
Preferably, described cylinder body upper end is provided with the cylinder inner bore that is communicated with described the first seal chamber and described the second seal chamber, described piston rod can pass described cylinder inner bore with moving up and down, between the sidewall of described cylinder inner bore and the outer circumferential face of described piston rod, be provided with seal ring and form motive sealing, on the sidewall of described cylinder inner bore, be also provided with the guidance tape that the motion of described piston rod is play the guiding role.
Preferably, be also provided with to keep out the back-up ring of described bearing on the inwall of described housing, described back-up ring is positioned at the top of described bearing.
Preferably, between described top cover and described housing, by O RunddichtringO, be tightly connected; Described top cover is provided with the top cover endoporus passing for described operating stem activity, is provided with seal ring and forms motive sealing between described top cover endoporus and described operating stem.
Owing to adopting technique scheme, deep water of the present invention under water gate valve hydraulic unit driver has the following advantages: (1) can realize hydraulic driving opening and closing gate valve; (2) can be by mechanical manipulation operation opening and closing gate valve during without pressure at hydraulic power; (3) during by hydraulic driving gate valve, realizing aperture indicates.
Accompanying drawing explanation
Fig. 1 is the deep water of the present invention structural representation of gate valve hydraulic unit driver under water.
In accompanying drawing: 1, operating stem; 2, screw; 3, top cover; 4, seal ring; 5, O RunddichtringO; 6, back-up ring; 7, guidance tape; 8, back-up ring; 9, bearing; 10, bearing; 11, Compress Spring; 12, positioning ring; 13, screw; 14, housing; 15, piston rod; 16, plug; 17, cylinder body; 18, piston packing ring; 19, O RunddichtringO; 20, pin; 21, valve rod; 22, O RunddichtringO; 23, valve gap; 24, O RunddichtringO; 25, seal ring; 26, Gland; 27, screw; 29, nut; 30, bolt; 31, guidance tape; 32, stem packing; 33, one-way valve; 34, hydraulic power import; 35, upper seal chamber; 36, lower seal cavity; 37, relief hole; 38, relief hole; 39, piston; 40, seal ring; 41, guidance tape.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
Refer to Fig. 1, the invention provides a kind of deep water gate valve hydraulic unit driver 100 under water, comprise that the valve gap 23, the lower end that are connected on gate valve body are connected to the valve rod 21 on flashboard for sluice valve, valve rod 21 can move up and down to be located in valve gap 23 and with valve gap 23 and be tightly connected.Described deep water under water gate valve hydraulic unit driver 100 also comprises cylinder body 17, housing 14, piston 39, operating stem 1, bearing 10, Compress Spring 11 and positioning ring 12.Wherein, valve gap 23, cylinder body 17, housing 14 coaxially connect successively, and in the present embodiment, three is fixed together by bolt 30 and nut 29.Valve rod 21, piston 39 and operating stem 1 also coaxially connect successively.
On valve gap 23, there is the endoporus passing for valve rod 21 activities, between the outer circumferential face of valve rod 21 and the endoporus of valve gap 23, be provided with stem packing 32, between valve rod 21 and stem packing 32, form motive sealing.The top of stem packing 32 is also installed with Gland 26, valve rod 21 is through the endoporus of Gland 26, between endoporus Gland 26 and valve gap 23, be provided with O RunddichtringO 24, between the outer circumferential face of the endoporus of Gland 26 and valve rod 21, by seal ring 25, form motive sealing, on the endoporus sidewall of Gland 26, be also provided with the guidance tape 31 that the motion of valve rod 21 is play the guiding role.Between stem packing 32, O RunddichtringO 24 and seal ring 25, form a confined space.On valve gap 23, be also provided with the relief hole 37 being connected with described confined space.In the present embodiment, on valve gap 23, be also provided with the one-way valve 33 being connected with gate valve valve pocket.
Cylinder body 17 is sealedly connected on valve gap 23, between valve gap 23 and the end face of cylinder body 17, by O RunddichtringO 22, is tightly connected.Between cylinder body 17 and valve gap 23, form the first seal chamber, insert in described the first seal chamber the upper end of valve rod 21.
Housing 14 is sealedly connected on cylinder body 17, and the upper end of housing 14 is sealedly connected with top cover 3, between top cover 3, housing 14 and described cylinder body 17, forms the second seal chamber.In the present embodiment, the external frame of cylinder body 17 is bucking ladder shape, and housing 14 is set on cylinder body 17 and by pin 20 and is fixedly connected with, and between cylinder body 17 and housing 14, by O RunddichtringO 19, seals.
Piston 39 can move up and down and be arranged in described the first seal chamber, and the sidewall of piston 39 and cylinder body 17 is tightly connected described the first seal chamber is divided into upper seal chamber 35 and lower seal cavity 36 up and down.Between the sidewall of the outer circumferential face of piston 39 and cylinder body 17, be provided with piston packing ring 18 and form motive sealing.Cylinder body 17 is provided with the hydraulic power import 34 that upper seal chamber 35 is in communication with the outside.In the present embodiment, on valve gap 23, be also provided with the relief hole 38 that described lower seal cavity 36 is in communication with the outside.Piston 39 is fixedly connected with the upper end of valve rod 21, and the top of piston 39 has and can through cylinder body 17, enter the piston rod 15 of described the second seal chamber with moving up and down, between piston rod 15 and cylinder body 17, is tightly connected.Particularly, cylinder body 17 upper ends are provided with the cylinder inner bore that is communicated with described the first seal chamber and described the second seal chamber, piston rod 15 can pass described cylinder inner bore with moving up and down, between the outer circumferential face of the sidewall of described cylinder inner bore and piston rod 15, be provided with seal ring 4 and form motive sealing, on the sidewall of cylinder inner bore, be also provided with the guidance tape 7 that the motion of piston rod 15 is play the guiding role.
Operating stem 1 can move up and down and can along self axial rotation be arranged in the second seal chamber, its top movable is through top cover 3 and be tightly connected by seal ring 40 with top cover 3, its underpart is threaded with the top of piston rod 15.Between top cover 3 and housing 14, by O RunddichtringO 5, be tightly connected; Top cover 3 is provided with the top cover endoporus passing for operating stem 1 activity, is provided with seal ring 40 and forms motive sealing, and in top cover endoporus, be also provided with the guidance tape 41 that the motion of operating stem 1 is play the guiding role between top cover endoporus and operating stem 1.
Bearing 10 can move up and down and be located at the top of described the second seal chamber, operating stem 1 by bearing 9 can along self axial rotation be arranged on bearing 10.In the present embodiment, bearing 10 is the reeded U-shaped structure of middle part tool, the movable through hole through bottom portion of groove in bottom of operating stem 1.Bearing 9 can move up and down and be placed in the groove of bearing 10.The back-up ring 6 that is also provided with to keep out bearing 10 on the inwall of housing 14, back-up ring 6 is positioned at the top of bearing 10, and the distance that back-up ring 6 moves upward in order to limit bearing is avoided bearing 10 and top cover 3 collisions.The cell wall top of bearing groove is also provided with back-up ring 8, to prevent that bearing 9 from deviating from from groove.Wherein, the groove of the corresponding bearing 10 in the lower end surface of top cover 3 has outstanding jut downwards, and this jut moves upward in order to keep out bearing 9.
Compress Spring 11 is connected between bearing 10 and cylinder body 17, and the elastic force of Compress Spring 11 is by bearing 10 jack-up.
On piston rod 15, be also installed with positioning ring 12, positioning ring 12 is positioned at the top of cylinder body 17, and the distance X between the lower end surface of positioning ring 12 and the upper-end surface of cylinder body 17 equals the stroke of flashboard for sluice valve.Positioning ring 12 is threaded on piston rod 15 and by the screw 13 radially arranging and is fixedly connected with piston rod 15, and piston rod 15 tops surpass positioning ring 12 and the length of the part that is threaded with operating stem 1 is greater than the stroke of flashboard for sluice valve.
Working principle of the present invention is:
(1) hydraulic driving opening and closing gate valve principle: hydraulic power (for example hydraulic oil) enters into the upper seal chamber 35 of piston 39 tops by controlling pipeline by hydraulic power import, thereby promoting piston 39 moves downward, piston 39 promotes connected valve rod 21, thereby make valve rod 21 promote flashboard, opens gate valve; When hydraulic power is during without pressure, under the resilient force of Compress Spring 11, Compress Spring 11 promotes bearings 10 and operating stem 1 moves upward, and operating stem 1 drives piston rod 15 and piston 39 to move upward thereupon, thereby makes valve rod 21 drive the flashboards closing gate valve that moves upward.
(2) machinery is controlled opening and closing gate valve principle: during hydraulic pressure that the upper seal chamber 35 in cylinder body 17 is supplied with without pressure source, due to the effect of Compress Spring 11, make gate valve in closed condition, and now can be by mechanical control system operation gate valve switch.By mechanical control system, drive and be rotated counterclockwise operating stem 1, operating stem 1 moves upward operating stem 1 with the threaded function of piston rod 15, until inconsistent between bearing 9 and top cover 3, operating stem 1 cannot continue to move upward, continue to be rotated counterclockwise operating stem 1,, because the threaded function between operating stem 1 and piston rod 15 promotes piston rod 15 and piston 39 moves downward, piston 39 promotes valve rod 21 and moves downward, thereby makes valve rod 21 drive flashboard to open gate valve.Otherwise, operating stem 1 turns clockwise, because making operating stem 1, the threaded function between operating stem 1 and piston rod 15 moves downward, until bearing 9 is inconsistent with bearing 10, continue to clockwise rotate operating stem 1, because the threaded function between operating stem 1 and piston rod 15 makes piston rod 15 and piston 39, move upward, piston 39 promotes valve rod 21 and moves upward, thereby makes valve rod 21 drive flashboard closing gate valve.
(3) gate valve aperture indication principle: during by hydraulic pressure opening gate valve, piston 39 drives operating stem 1 to move downward; After hydraulic pressure is cancelled, under the effect of Compress Spring 11, during closing gate valve, Compress Spring 11 drives operating stem 1 to move upward.The opening and closing of gate valve, respectively downwards and move upward, so operating stem 1 length of stretching out top cover 3 can be indicated the aperture of gate valve gate valve when hydraulic control to operating stem 1.
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. deep water gate valve hydraulic unit driver under water, comprise that the valve gap, the lower end that are connected on gate valve body are connected to the valve rod on flashboard for sluice valve, it is characterized in that: described valve rod can move up and down to be located in described valve gap and with described valve bonnet seal and be connected, and described deep water under water gate valve hydraulic unit driver also comprises:
Cylinder body, it is sealedly connected on described valve gap, between described cylinder body and described valve gap, forms the first seal chamber, and insert in described the first seal chamber the upper end of described valve rod;
Housing, it is sealedly connected on described cylinder body, and the upper end of described housing is sealedly connected with top cover, between described top cover, described housing and described cylinder body, forms the second seal chamber;
Piston, it can move up and down and be arranged in described the first seal chamber, the sidewall of described piston and described cylinder body is tightly connected described the first seal chamber is divided into upper seal chamber and lower seal cavity up and down, and described cylinder body is provided with the hydraulic power import that described upper seal chamber is in communication with the outside; Described piston is fixedly connected with the upper end of described valve rod, and the top of described piston has and can through described cylinder body, enter the piston rod of described the second seal chamber with moving up and down, between described piston rod and described cylinder body, is tightly connected;
Operating stem, its can move up and down and can along self axial rotation be arranged in described the second seal chamber, its top movable is through described top cover and be connected with described top seal, its underpart is threaded with the top of described piston rod;
Bearing, it can move up and down and be located at the top of described the second seal chamber, described operating stem by bearing can along self axial rotation be arranged on described bearing;
Compression elastic piece, it is connected between described bearing and described cylinder body.
2. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: on described piston rod, be also installed with positioning block, described positioning block is positioned at the top of described cylinder body.
3. a kind of deep water according to claim 2 gate valve hydraulic unit driver under water, is characterized in that: described positioning block is positioning ring, and the distance between the lower end surface of described positioning ring and the upper-end surface of described cylinder body equals the stroke of flashboard for sluice valve; Described positioning ring is threaded on described piston rod and by the screw radially arranging and is fixedly connected with described piston rod, and described piston rod top surpasses described positioning ring and the length of the part that is threaded with described operating stem is greater than the stroke of flashboard for sluice valve.
4. a kind of deep water according to claim 3 gate valve hydraulic unit driver under water, it is characterized in that: described valve rod is round bar, on described valve gap, there is the endoporus passing for described valve handle activity, between the outer peripheral surface of described valve rod and the endoporus of described valve gap, be provided with stem packing, between described valve rod and described stem packing, form motive sealing; The top of described stem packing is also installed with Gland, described valve rod is through the endoporus of described Gland, between the endoporus of described Gland and described valve gap, be provided with O RunddichtringO, between the endoporus of described Gland and the outer peripheral surface of described valve rod, by seal ring, form motive sealing, between described stem packing, described O RunddichtringO and described seal ring, form a confined space; On described valve gap, be also provided with the relief hole being connected with described confined space.
5. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: on described valve gap, be also provided with the one-way valve being connected with gate valve valve pocket.
6. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: between described valve gap and the end face of described cylinder body, by O RunddichtringO, be tightly connected.
7. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: between the outer circumferential face of described piston and the sidewall of described cylinder body, be provided with piston packing ring and form motive sealing.
8. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, it is characterized in that: described cylinder body upper end is provided with the cylinder inner bore that is communicated with described the first seal chamber and described the second seal chamber, described piston rod can pass described cylinder inner bore with moving up and down, between the sidewall of described cylinder inner bore and the outer circumferential face of described piston rod, be provided with seal ring and form motive sealing, on the sidewall of described cylinder inner bore, be also provided with the guidance tape that the motion of described piston rod is play the guiding role.
9. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: on the inwall of described housing, be also provided with to keep out the back-up ring of described bearing, described back-up ring is positioned at the top of described bearing.
10. a kind of deep water according to claim 1 gate valve hydraulic unit driver under water, is characterized in that: between described top cover and described housing, by O RunddichtringO, be tightly connected; Described top cover is provided with the top cover endoporus passing for described operating stem activity, is provided with seal ring and forms motive sealing between described top cover endoporus and described operating stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697859.8A CN103672130A (en) | 2013-12-18 | 2013-12-18 | Deepwater underwater brake valve hydraulic driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697859.8A CN103672130A (en) | 2013-12-18 | 2013-12-18 | Deepwater underwater brake valve hydraulic driver |
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| Publication Number | Publication Date |
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| CN103672130A true CN103672130A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310697859.8A Pending CN103672130A (en) | 2013-12-18 | 2013-12-18 | Deepwater underwater brake valve hydraulic driver |
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| CN (1) | CN103672130A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106594366A (en) * | 2016-12-12 | 2017-04-26 | 中船重工中南装备有限责任公司 | Hydraulic and manual integration device and operating method thereof |
| CN107355449A (en) * | 2017-09-20 | 2017-11-17 | 中国船舶重工集团公司第七0三研究所 | A kind of electro-hydraulic driving small oil tank |
| CN108506557A (en) * | 2018-04-24 | 2018-09-07 | 苏州纽威阀门股份有限公司 | A kind of execution system for driving valve to open and close |
| CN109404467A (en) * | 2018-12-10 | 2019-03-01 | 新昌县万合机械有限公司 | A kind of hydraulic shock-absorbing cylinder |
| CN109537693A (en) * | 2018-12-05 | 2019-03-29 | 厦门融技精密科技有限公司 | A kind of hydraulic drive mechanism of drain valve of toilet |
| CN109555894A (en) * | 2018-12-28 | 2019-04-02 | 苏州协昌环保科技股份有限公司 | Electro-pneumatic poppet |
| CN112254896A (en) * | 2020-09-08 | 2021-01-22 | 合肥通用机械研究院有限公司 | Performance test device and test method for filler sealing system for angular travel valve rod |
| CN113324087A (en) * | 2021-06-30 | 2021-08-31 | 纽威石油设备（苏州）有限公司 | Hydraulic driving device for underwater valve |
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| CN106594366A (en) * | 2016-12-12 | 2017-04-26 | 中船重工中南装备有限责任公司 | Hydraulic and manual integration device and operating method thereof |
| CN107355449A (en) * | 2017-09-20 | 2017-11-17 | 中国船舶重工集团公司第七0三研究所 | A kind of electro-hydraulic driving small oil tank |
| CN108506557A (en) * | 2018-04-24 | 2018-09-07 | 苏州纽威阀门股份有限公司 | A kind of execution system for driving valve to open and close |
| CN108506557B (en) * | 2018-04-24 | 2024-04-26 | 苏州纽威阀门股份有限公司 | Execution system for driving valve to open and close |
| CN109537693A (en) * | 2018-12-05 | 2019-03-29 | 厦门融技精密科技有限公司 | A kind of hydraulic drive mechanism of drain valve of toilet |
| CN109404467A (en) * | 2018-12-10 | 2019-03-01 | 新昌县万合机械有限公司 | A kind of hydraulic shock-absorbing cylinder |
| CN109555894A (en) * | 2018-12-28 | 2019-04-02 | 苏州协昌环保科技股份有限公司 | Electro-pneumatic poppet |
| CN112254896A (en) * | 2020-09-08 | 2021-01-22 | 合肥通用机械研究院有限公司 | Performance test device and test method for filler sealing system for angular travel valve rod |
| CN112254896B (en) * | 2020-09-08 | 2023-12-05 | 合肥通用机械研究院有限公司 | Performance test device and test method for packing sealing system for angular travel valve rod |
| CN113324087A (en) * | 2021-06-30 | 2021-08-31 | 纽威石油设备（苏州）有限公司 | Hydraulic driving device for underwater valve |
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Application publication date: 20140326 |