CN111188936A - Pressure-maintaining type emergency cut-off straight-stroke valve device at lower part of piston and using method - Google Patents
Pressure-maintaining type emergency cut-off straight-stroke valve device at lower part of piston and using method Download PDFInfo
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- CN111188936A CN111188936A CN201811350131.7A CN201811350131A CN111188936A CN 111188936 A CN111188936 A CN 111188936A CN 201811350131 A CN201811350131 A CN 201811350131A CN 111188936 A CN111188936 A CN 111188936A
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- Prior art keywords
- hydraulic oil
- piston
- valve
- pressure
- straight
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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
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a pressure-maintaining type emergency cut-off straight-stroke valve device at the lower part of a piston and a using method thereof, belonging to the technical field of oil and gas storage and transportation. The hydraulic oil cylinder is divided into an upper hydraulic oil cylinder and a lower hydraulic oil cylinder which are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder, one end of the piston rod is arranged below the piston, and the other end of the piston rod is connected with the valve rod; the second hydraulic cylinder is sequentially connected with the gear pump module and the oil tank module, and a pressure transmitter and an electromagnetic valve are sequentially arranged on a pipeline connected with the second hydraulic cylinder and the gear pump module. The invention can monitor the hydraulic oil pressure at the lower part of the piston in real time, and when the pressure at the lower part of the piston is insufficient, the pressure at the lower part of the piston is automatically kept by the invention, so that the valve position of the valve is kept stable.
Description
Technical Field
The invention belongs to the technical field of oil and gas storage and transportation, and particularly relates to a pressure-maintaining type emergency cut-off straight-stroke valve device at the lower part of a piston and a use method thereof.
Background
The hydraulic emergency cut-off valve is opened and closed by utilizing high-pressure hydraulic oil on two sides of the piston. CN205978743U discloses a valve actuator based on a gas-liquid combined spring, in which high-pressure gas enters a hydraulic cylinder to further quickly push a valve rod to move. In the field of oil and gas storage and transportation, some valves are always opened, and the valves can be closed only in emergency. When the hydraulic emergency cut-off valve is in an open state for a long time, hydraulic oil leakage points are inevitably formed due to the existence of some hydraulic oil pipeline accessories, hydraulic oil at the lower part of the piston leaks under the long-term action, the pressure at the lower part of the piston is reduced, the pressures at two sides of the piston are unstable, and the piston rod and the valve rod are reduced, so that the valve is closed to be small.
At present, a high-pressure gas source is lacked in a large-scale oil reservoir, the high-pressure gas cannot be used for pushing a valve rod of a straight-stroke valve of a storage tank, and meanwhile, the emergency cut-off device which is completely suitable for the straight-stroke valve of the storage tank does not exist at present through search and discovery.
Disclosure of Invention
The invention aims to provide a pressure-maintaining type emergency cut-off straight-stroke valve device at the lower part of a piston and a using method thereof, which can monitor the hydraulic oil pressure at the lower part of the piston in real time, and automatically maintain the pressure at the lower part of the piston by self when the pressure at the lower part of the piston is insufficient, so as to maintain the stability of a valve position of a valve.
The technical solution comprises:
the utility model provides a piston lower part pressurize formula emergency cut-off straight stroke valve device, its includes straight stroke valve, hydraulic cylinder, piston rod, gear pump module and oil tank module, straight stroke valve be connected with valve rod, its characterized in that:
the piston is positioned in the hydraulic oil cylinder, the hydraulic oil cylinder is divided into an upper part and a lower part which are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder, one end of the piston rod is arranged below the piston, and the other end of the piston rod is connected with the valve rod;
the second hydraulic cylinder is connected with a hydraulic oil pipeline A, and the first hydraulic cylinder is connected with a hydraulic oil pipeline B;
the second hydraulic cylinder is connected with the gear pump module and the oil tank module in sequence, and a pressure transmitter and an electromagnetic valve are arranged on a pipeline connected with the gear pump module in sequence.
In a preferred embodiment of the present invention, the piston rod is connected to the valve rod through a connecting module.
As another preferable scheme of the invention, the connecting module is provided with an internal thread, the valve rod is provided with an external thread, and the valve rod are connected in a matching way through the threads.
Another object of the present invention is to provide a method for using a pressure-maintaining type emergency shut-off straight stroke valve device under a piston, which comprises the following steps in sequence:
a, opening or closing a straight stroke valve through the interaction of a piston, a piston rod, a valve rod and hydraulic oil;
b, after the straight stroke valve is opened, closing the hydraulic oil pipeline A, so that the straight stroke valve is normally opened;
and c, when the straight stroke valve is normally opened, the second hydraulic oil cylinder is filled with hydraulic oil, the hydraulic part is easy to leak, when the hydraulic part leaks, the pressure in the second hydraulic oil cylinder is monitored through the pressure transmitter, and when the pressure drops, the electromagnetic valve and the gear pump module are automatically started, hydraulic oil is pumped from the oil tank module to the second hydraulic oil cylinder, so that the pressure in the second hydraulic oil cylinder is kept stable.
Furthermore, in the step a, hydraulic oil enters the second hydraulic oil cylinder through the hydraulic oil pipeline A, the piston is continuously pushed to move upwards, and at the moment, the piston drives the piston rod and the valve rod to move upwards, so that the straight stroke valve is opened.
Furthermore, in the step a, hydraulic oil enters the first hydraulic oil cylinder through the hydraulic oil pipeline B, and at the moment, the piston drives the piston rod and the valve rod to move downwards, so that the straight stroke valve is cut off emergently.
The beneficial technical effects brought by the invention are as follows:
the invention provides a pressure-maintaining type emergency cut-off straight-stroke valve at the lower part of a piston, which is suitable for reconstructing and upgrading a storage tank gate valve in the prior art, wherein only a hand wheel at the upper part of an original valve rod is removed during reconstruction and upgrading, internal threads are arranged inside a connecting module and are matched with an external threaded rod on the valve rod, the whole device is connected with the valve rod through the internal threads of the connecting module, meanwhile, the emergency cut-off device can monitor the pressure of hydraulic oil at the lower part of the piston in real time, and when the pressure at the lower part of the piston is insufficient, the pressure at the lower part of the piston is automatically maintained by.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a pressure-maintaining type emergency cut-off straight-stroke valve device at the lower part of a piston according to the present invention;
in the figure, 1-straight stroke valve; 2-a valve stem; 3-a connection module; 4-a piston rod; 5-hydraulic oil pipeline A; 6-a hydraulic oil cylinder; 7-a piston; 8-hydraulic oil line B; 9-a pressure transmitter; 10-an electromagnetic valve; 11-a gear pump module; 12-tank module.
Detailed Description
The invention provides a pressure-maintaining type emergency cut-off straight-stroke valve device at the lower part of a piston and a using method thereof, and in order to make the advantages and the technical scheme of the invention clearer and clearer, the invention is described in detail by combining specific embodiments.
As shown in fig. 1, the pressure-maintaining emergency cut-off straight stroke valve device at the lower part of the piston comprises a straight stroke valve 1, a valve rod 2, a connecting module 3, a piston rod 4, a hydraulic oil pipeline A5, a hydraulic oil cylinder 6, a piston 7, a hydraulic oil pipeline B8, a pressure transmitter 9, an electromagnetic valve 10, a gear pump module 11 and an oil tank module 12. The device can be used for the transformation and the upgrading of the storage tank gate valve on the premise of not influencing normal production. The original storage tank straight stroke valve (tank root gate valve) is of a hand wheel type, the valve is closed by manually rotating a hand wheel, and the emergency cut-off function is not realized. When the original storage tank straight stroke valve is reformed and upgraded, only a hand wheel on the upper part of an original valve rod needs to be removed, an internal thread is arranged inside a connecting module 3 and corresponds to an external thread on the valve rod 2, the whole emergency cut-off actuating mechanism is connected with the valve rod 2 through the internal thread of the connecting module 3, meanwhile, a piston rod 4 is connected with the valve rod 2 through the connecting module 3, a piston 7 is positioned in a hydraulic oil cylinder 6, the hydraulic oil cylinder 6 is divided into an upper part and a lower part which are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder, one end of the piston rod 4 is arranged below the piston 7, and the other end of the piston rod 4 is connected with the; the second hydraulic cylinder is connected with a hydraulic oil pipeline A5, and the first hydraulic cylinder is connected with a hydraulic oil pipeline B8; the second hydraulic cylinder is connected with the gear pump module 11 and the oil tank module 12 in sequence, and a pressure transmitter 9 and an electromagnetic valve 10 are arranged on a pipeline connected with the second hydraulic cylinder and the gear pump module 11 in sequence.
The piston rod 4 with the valve rod 2 between be connected through connecting module 3, preferred connecting module 3 is provided with the internal thread, valve rod 2 is provided with the external screw thread, the two is through screw thread accordant connection.
When hydraulic oil enters the lower part of the hydraulic oil cylinder 6 through the hydraulic oil pipeline A5, the piston 7 drives the piston rod 4 and the valve rod 2 to move upwards, so that the straight stroke valve 1 is opened; when hydraulic oil rapidly enters the upper part of the hydraulic oil cylinder 6 through the hydraulic oil pipeline B8, the piston 7 can push the piston rod 4 and the valve rod 2 to rapidly move downwards, and therefore the straight stroke valve is cut off emergently. When the straight stroke valve 1 is in a normally open state, the lower part of the piston 7 is filled with high-pressure hydraulic oil, when the straight stroke valve 1 is under the action of the high-pressure hydraulic oil for a long time, the hydraulic component is easy to leak, when the hydraulic component leaks, the pressure at the lower part of the piston 7 is reduced, and the stability of the piston 7 and the straight stroke valve 1 cannot be maintained. When the pressure transmitter 9 monitors that the pressure at the lower part of the piston 7 is reduced, the electromagnetic valve 10 and the gear pump module 11 are started, and hydraulic oil is pumped from the oil tank module 12 to the lower part of the piston 7, so that the pressure at the lower part of the piston 7 is kept stable, and the valve position of the straight-stroke valve 1 can be kept stable all the time.
The use method of the pressure-maintaining type emergency cut-off straight stroke valve device at the lower part of the piston comprises the following steps:
(1) when the original storage tank straight-stroke valve 1 is reformed and upgraded, only a hand wheel on the upper part of an original valve rod 2 needs to be removed, an internal thread is arranged inside a connecting module 3 and corresponds to an external thread on the valve rod 2, the whole emergency cut-off actuating mechanism is connected with the valve rod 2 through the internal thread of the connecting module 3, and meanwhile, a piston rod 4 is connected with the valve rod 2 through the connecting module 3;
(2) when hydraulic oil enters a second hydraulic oil cylinder from the hydraulic oil pipeline A5, the piston 7 is continuously pushed to move upwards, and the piston 7 drives the piston rod 4 and the valve rod 2 to move upwards, so that the straight-stroke valve 1 is opened;
(3) when hydraulic oil rapidly enters the first hydraulic oil cylinder from the hydraulic oil pipeline B8, the piston 7 can push the piston rod 4 and the valve rod 2 to rapidly move downwards, so that the straight stroke valve 1 is emergently cut off;
(4) when the straight stroke valve 1 is in a normally open state, the lower part of the piston 7 is filled with high-pressure hydraulic oil, when the straight stroke valve 1 is under the action of the high-pressure hydraulic oil for a long time, the hydraulic component is easy to leak, when the hydraulic component leaks, the pressure at the lower part of the piston 7 is reduced, and the stability of the piston 7 and the straight stroke valve 1 cannot be maintained;
(5) when the pressure transmitter 9 monitors that the pressure at the lower part of the piston 7 is reduced, the electromagnetic valve 10 and the gear pump module 11 are started, and hydraulic oil is pumped from the oil tank module 12 to the lower part of the piston 7, so that the pressure at the lower part of the piston 7 is kept stable, and the valve position of the straight-stroke valve 1 can be kept stable all the time.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
Although terms such as straight stroke valve 1, valve stem 2, connecting block 3, piston rod 4 etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
It is further understood that the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. The utility model provides a piston lower part pressurize formula emergency cut-off straight stroke valve device, its includes straight stroke valve, hydraulic cylinder, piston rod, gear pump module and oil tank module, straight stroke valve be connected with valve rod, its characterized in that:
the piston is positioned in the hydraulic oil cylinder, the hydraulic oil cylinder is divided into an upper part and a lower part which are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder, one end of the piston rod is arranged below the piston, and the other end of the piston rod is connected with the valve rod;
the second hydraulic cylinder is connected with a hydraulic oil pipeline A, and the first hydraulic cylinder is connected with a hydraulic oil pipeline B;
the second hydraulic cylinder is connected with the gear pump module and the oil tank module in sequence, and a pressure transmitter and an electromagnetic valve are arranged on a pipeline connected with the gear pump module in sequence.
2. The piston under-pressure-retaining emergency shut-off straight-stroke valve device according to claim 1, wherein: the piston rod is connected with the valve rod through a connecting module.
3. The piston under-pressure-retaining slam-shut straight-stroke valve device of claim 2, wherein: the connecting module is provided with an internal thread, the valve rod is provided with an external thread, and the valve rod and the external thread are connected in a matching mode through the threads.
4. The method of using a piston under-pressure-retaining slam-shut straight-stroke valve device as claimed in claim 1, comprising the steps of, in order:
a, opening or closing a straight stroke valve through the interaction of a piston, a piston rod, a valve rod and hydraulic oil;
b, after the straight stroke valve is opened, closing the hydraulic oil pipeline A, so that the straight stroke valve is normally opened;
and c, when the straight stroke valve is normally opened, the second hydraulic oil cylinder is filled with hydraulic oil, the hydraulic part is easy to leak, when the hydraulic part leaks, the pressure in the second hydraulic oil cylinder is monitored through the pressure transmitter, and when the pressure drops, the electromagnetic valve and the gear pump module are automatically started, hydraulic oil is pumped from the oil tank module to the second hydraulic oil cylinder, so that the pressure in the second hydraulic oil cylinder is kept stable.
5. The use of a piston under-pressure-retaining slam-shut straight-stroke valve device as claimed in claim 4, wherein: in the step a, hydraulic oil enters the second hydraulic oil cylinder through the hydraulic oil pipeline A, the piston is continuously pushed to move upwards, and at the moment, the piston drives the piston rod and the valve rod to move upwards, so that the straight stroke valve is opened.
6. The use of a piston under-pressure-retaining slam-shut straight-stroke valve device as claimed in claim 4, wherein: in the step a, hydraulic oil enters the first hydraulic oil cylinder through the hydraulic oil pipeline B, and at the moment, the piston drives the piston rod and the valve rod to move downwards, so that the straight stroke valve is cut off emergently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350131.7A CN111188936A (en) | 2018-11-14 | 2018-11-14 | Pressure-maintaining type emergency cut-off straight-stroke valve device at lower part of piston and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811350131.7A CN111188936A (en) | 2018-11-14 | 2018-11-14 | Pressure-maintaining type emergency cut-off straight-stroke valve device at lower part of piston and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111188936A true CN111188936A (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811350131.7A Pending CN111188936A (en) | 2018-11-14 | 2018-11-14 | Pressure-maintaining type emergency cut-off straight-stroke valve device at lower part of piston and using method |
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| Country | Link |
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| CN (1) | CN111188936A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5097857A (en) * | 1991-08-02 | 1992-03-24 | John Mayhew | Electro-hydraulic valve-actuator system |
| CN2114071U (en) * | 1991-08-01 | 1992-08-26 | 浙江大学 | Butterfly valve for controlling electrolyte proportion |
| CN2437891Y (en) * | 2000-08-22 | 2001-07-04 | 阴振生 | Liquid filling valve with lead type unload valve |
| CN105626941A (en) * | 2014-10-29 | 2016-06-01 | 黑龙江宏宇电站设备有限公司 | Counter weight hydraulic control butterfly valve |
| CN206054892U (en) * | 2016-08-03 | 2017-03-29 | 上海杉得自动化控制有限公司 | A kind of safety Direct Travel executor |
-
2018
- 2018-11-14 CN CN201811350131.7A patent/CN111188936A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114071U (en) * | 1991-08-01 | 1992-08-26 | 浙江大学 | Butterfly valve for controlling electrolyte proportion |
| US5097857A (en) * | 1991-08-02 | 1992-03-24 | John Mayhew | Electro-hydraulic valve-actuator system |
| CN2437891Y (en) * | 2000-08-22 | 2001-07-04 | 阴振生 | Liquid filling valve with lead type unload valve |
| CN105626941A (en) * | 2014-10-29 | 2016-06-01 | 黑龙江宏宇电站设备有限公司 | Counter weight hydraulic control butterfly valve |
| CN206054892U (en) * | 2016-08-03 | 2017-03-29 | 上海杉得自动化控制有限公司 | A kind of safety Direct Travel executor |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200522 |
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| RJ01 | Rejection of invention patent application after publication |