WO2001075356A1 - Dispositif de protection automatique contre l'eclatement de canalisations - Google Patents

Dispositif de protection automatique contre l'eclatement de canalisations Download PDF

Info

Publication number
WO2001075356A1
WO2001075356A1 PCT/CN2001/000138 CN0100138W WO0175356A1 WO 2001075356 A1 WO2001075356 A1 WO 2001075356A1 CN 0100138 W CN0100138 W CN 0100138W WO 0175356 A1 WO0175356 A1 WO 0175356A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
cylinder
fluid
control
tube
Prior art date
Application number
PCT/CN2001/000138
Other languages
English (en)
Chinese (zh)
Inventor
Xiangwei Zeng
Original Assignee
Xiangwei Zeng
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiangwei Zeng filed Critical Xiangwei Zeng
Priority to AU39095/01A priority Critical patent/AU3909501A/en
Publication of WO2001075356A1 publication Critical patent/WO2001075356A1/fr

Links

Classifications

    • 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
    • F16K31/16—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member
    • F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
    • F16K31/1635—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston for rotating valves
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/1022—Fluid cut-off devices automatically actuated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005—Valves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/10—Preventing damage by freezing or excess pressure or insufficient pressure

Definitions

  • the present invention relates to a control device for a fluid pipeline, in particular to a pipeline blast protection device for a pipeline capable of passing a long-distance fluid through a pig. Background technique
  • the existing pipeline blast protection system has a gas-liquid linkage emergency cut-off system, which uses multiple valves and energy storage tanks to transmit, convert, and amplify the pressure drop signal caused by the blast through multiple stages to form a sufficiently large thrust to promote the hydraulic drive device. To drive the ball valve to cut off the flow channel.
  • This kind of pipeline blast protection system has complicated structures and long pressure drop signal transmission lines. It is necessary to use external energy such as energy storage tanks to achieve pipeline closure protection.
  • an object of the present invention is to provide a self-supporting ball-type pipe blasting protection device capable of closing a valve by using a fluid in a pipe when the pipe leaks due to blasting, and also passing a pig.
  • the present invention provides a self-supporting ball-type pipeline blasting protection device, including:
  • a main valve and a first controller for controlling opening and closing of the main valve the main valve having a valve body in communication with a fluid pipe, a main valve core arranged in the valve body, and a main valve connected to the main valve core A valve stem;
  • the first controller includes:
  • a first piston-type hydraulic control cylinder a control rod connected to a control piston provided in the cylinder body of the hydraulic cylinder is connected to the main valve and is used for converting the linear reciprocating movement of the piston into The opening and closing movement of the main spool;
  • the cylinder cavity of the first hydraulic cylinder is divided into a first cavity and a second cavity by the piston, and a reset spring for resetting the control piston is installed in the first cavity
  • the second chamber is formed with a first cylinder port for discharging fluid therein, and a control valve is configured to control the discharge of the fluid in the second chamber through the first cylinder port;
  • a flow sensor for sensing the flow velocity of the fluid in the fluid tube, and controlling the connection or disconnection of the fluid tube and the second cavity of the hydraulic cylinder according to the flow velocity of the fluid in the fluid tube, When a preset flow velocity value is exceeded, the flow sensor communicates the fluid tube with the second cavity of the hydraulic cylinder; the flow sensor may be at a first position in the fluid tube and from the fluid tube Moving between the second positions moved out; and
  • the self-supporting ball-type pipeline blast protection device further includes a control device for controlling the movement of the current sensor.
  • the current sensor includes a current sensing tube and a flow control tube communicating with the current sensing tube via a valve seat.
  • the current sensing tube is provided with a valve core that cooperates with the valve seat to open and close, and a return spring that resets the valve core
  • the flow sensing tube is arranged in the fluid tube and communicates with the flow channel of the fluid tube.
  • the flow control tube is in communication with the second cavity of the hydraulic cylinder. When the flow velocity of the fluid exceeds a preset flow velocity value, Spool and seat are open
  • the flow sensor is disposed in the main valve core, and the flow control tube of the flow sensor extends through the main valve stem in a tube shape along the axis and is movable relative to the main valve stem.
  • it further comprises a pressure storage cylinder, and a second cylinder port is formed in the second cavity of the second hydraulic cylinder, and the pressure storage cylinder communicates with the flow control tube and communicates with the first hydraulic cylinder through the second cylinder port.
  • the two chambers communicate with each other, an airbag is installed in the pressure storage cylinder, and a reverse damping regulating valve is provided on a connection path between the second cavity of the first hydraulic cylinder and the pressure storage cylinder.
  • a third cylinder port is formed in the first cavity of the first hydraulic cylinder, the third cylinder port is in communication with the fluid pipe, and a reverse damping adjustment valve or a solenoid valve is provided in the third cylinder port or communicates with the third cylinder port.
  • the current sensing pipe is located at a substantially central position of the fluid pipe.
  • the first cylinder port is in communication with the fluid pipe via a pipeline.
  • control valve is a solenoid valve or a manual valve.
  • the flow-sensing tube is arranged along the flow line of the fluid in the fluid tube and connected to the flow control tube in a T-shape.
  • a rack is formed on the control rod of the first hydraulic cylinder, and the rack meshes with a gear mounted on a main valve stem of the main valve.
  • the control device for controlling the movement of the current sensor includes: a second hydraulic cylinder, which includes a piston arranged in the cylinder body of the second hydraulic cylinder and a piston rod connected to the piston, and the piston rod is connected with the returned sensor; A drive transmission connection for driving the current sensor to move the current sensor; a pass valve configured on a pipeline connecting the fluid pipe and the second hydraulic cylinder; and a second controller for controlling the action of the pass valve In order to use the pressure fluid in the fluid pipe to control the reciprocating movement of the second hydraulic cylinder piston.
  • the bypass valve is used to control the communication between the two chambers separated by the piston of the second hydraulic cylinder and the fluid pipe and the atmosphere, and the spool of the bypass valve can enter its second work by activating the second controller.
  • Position when the spool of the pass valve is in the second working position, the fluid pipe is in communication with the first cavity of the hydraulic cylinder, and the second cavity is in communication with the atmosphere; the same-inch pass valve spool can be returned by deactivating the second controller
  • the fluid pipe is in communication with the second cavity of the second hydraulic cylinder, and the first cavity is in communication with the atmosphere.
  • the second controller includes a bypass valve stem connected to the spool of the bypass valve, and when the spool of the bypass valve is in its second working position, an end of the bypass valve stem facing away from the spool of the bypass valve extends into the fluid And the tube is arranged in such a way that the moving pig can push the bypass valve stem to move the bypass valve spool to its first working position; the controller further includes a hydraulic force operatively connected to the bypass valve
  • the reset valve is provided on the downstream side of the bypass valve.
  • the reset valve spool is connected with a reset valve stem, and the reset valve spool and the reset valve stem are biased by a spring to its first working position.
  • the end of the reset valve stem facing away from the reset valve spool extends into the fluid tube, and is arranged so that the moving pig can overcome the bias of the spring and push the reset stem to switch the reset valve spool.
  • the second controller is activated, and the hydraulic holding cylinder communicates with the fluid pipe via the reset valve and the bypass valve for will
  • the valve spool is maintained in its second operating position; while the reset valve is pushed out to its second operating position by the pig, the controller is deactivated, and the hydraulic holding cylinder passes the reset valve and the passage to the atmosphere.
  • the wide core of the access valve returns to its first working position.
  • the bypass valve is a two-position four-way valve
  • the reset valve is a two-position three-way valve.
  • a bidirectional regulating valve is provided on a pipeline between the second hydraulic cylinder and the access valve.
  • the piston rod of the second hydraulic cylinder is coaxially connected with the flow control tube of the current sensor and is integrated with the flow control tube.
  • a third cylinder port is formed in the first cavity of the first hydraulic cylinder, the third cylinder port communicates with the second cavity of the second hydraulic cylinder via a pipeline, and the third cylinder port is provided with a solenoid valve or a reverse valve. Damping adjustment Valve.
  • the main valve may be a valve that can pass the pig, such as a ball valve, a ffl plate valve, etc .; or a valve that can pass the pig, which the inventor has applied for a patent.
  • the current sensor and the control cylinder of the present invention are crusted.
  • fluid leakage causes a sharp change in the flow velocity of the fluid in the fluid pipe, and a difference in kinetic energy is generated between the two ends of the current pipe of the current sensor, which is transmitted to the current
  • the current sensing tube in the device pushes the valve core to turn the normally closed valve core and the valve seat into an open state.
  • the fluid flows from the current sensing tube through the valve seat and the control tube into the control cylinder, and the control piston is pushed through the control rod.
  • the main valve stem is driven to close the main valve and close the pipeline, thereby protecting the pipeline and preventing a large amount of fluid leakage; when the kinetic energy of the two ends of the current sensing tube is balanced, the valve core is reset by the spring, and the valve core and the valve seat are closed and reset After the fault is removed, the control cylinder is reset, and the transmission main valve is reset, so that the main valve is controlled.
  • the invention has the advantage of using fluid kinetic energy to control the main valve by itself to protect the fluid pipeline; in particular, because the current sensor can accept the fluid kinetic energy change in front of and behind the main valve, it has the advantage of no manual operation.
  • the hydraulic cylinder of the present invention is connected with the sensor drive, and the bypass valve connecting the hydraulic cylinder and the fluid tube is formed.
  • the hydraulic cylinder and the bypass valve can send the pressure fluid in the fluid tube into And discharge the hydraulic cylinder, use the kinetic energy of the fluid to drive the hydraulic cylinder to move, and operate the flow sensor to move up and down into the work position to make the pipeline open when the main valve is fully open;
  • the controller of the cylinder and the reset valve is crusted, so that the inductor can be kept in the exiting working state, thereby having the advantage of ensuring that the pig is passed smoothly.
  • the integrated structure of the present invention in which the flow sensor is arranged in the flow passage of the main spool of the main valve, and the combined structure connected with the piston of the hydraulic cylinder, not only has the advantage of allowing the pig to pass smoothly, Moreover, it has the advantages of small overall volume and convenient installation on pipelines.
  • the airbag in the energy storage tank is crusted, and energy is stored when the fluid kinetic energy is large before the fluid enters the control cylinder through the energy storage cylinder. At the end of the main valve closing time, the fluid kinetic energy is released in a small amount, and the main valve is closed reliably.
  • the reverse damping control valve of the control cylinder port of the present invention is crusted and has a delaying effect to maintain the current state of the main valve.
  • the main valve can be maintained in the opened or closed state.
  • the control of the cylinder port and the solenoid valve of the present invention can set the controller of the solenoid valve at a long distance. Therefore, based on the self-powered type, the remote control of the manual control valve of the cylinder port can be realized. After the main valve is closed by the current sensor and the control cylinder, the manual control valve is used to manually open the cylinder port to reset the main valve and the control cylinder.
  • the bidirectional regulating valve on the pipeline between the hydraulic cylinder and the access valve of the present invention is crusted, which can The flow rate of the fluid fed into and discharged from the hydraulic cylinder is adjusted, thereby having the advantage of adjusting the speed of the sensor entering and exiting the working position.
  • control rod of the control cylinder and the main valve rod of the present invention are connected by a rack and pinion, and have the advantages of simple structure and reliable operation. Brief description of the drawings
  • FIG. 1 is a schematic diagram of a first embodiment of a self-supporting ball-type pipe blasting protection device according to the present invention, showing a state in which a current sensor is initially opened and a control cylinder has not been operated;
  • FIG. 2 is a view similar to FIG. 1, showing a state when the fluid transfer line is cleaned with a pig;
  • FIG. 3 is a schematic diagram of a second embodiment of a self-supporting ball type pipeline blast protection device according to the present invention, in which a current sensor is installed in a main valve. Detailed description of the preferred embodiment
  • a first-pass ball-type pipeline blast protection device is formed by a main valve and a control device.
  • the control device is composed of a control cylinder 4, a pressure storage cylinder 16, a current sensor 18, a hydraulic cylinder 25, a pass valve 29 and a controller.
  • the controller is used to control the pass valve, and a hydraulic holding cylinder 43, a reset valve 48, etc. to make.
  • the main valve is installed in the fluid line, and the current sensor 18, the pass valve 29 and the reset valve 48 are fixed to a proper length of the connecting pipe.
  • the connecting pipe is connected to the main valve and coincides with the fluid line to become a part of the fluid pipe.
  • the hydraulic cylinder 25 is stacked above the pressure storage cylinder 16, the control cylinder 4 is arranged on the hydraulic cylinder side, and the hydraulic holding cylinder 43 is stacked above the bypass valve.
  • the main valve 1 is connected to the fluid pipe 2 with a normal knot, and has a valve body having a generally cavity shape.
  • the main valve core in the valve body is connected to the main valve stem 3.
  • a valve cover may be provided at the upper end of the valve body, and the valve body and the valve cover may adopt a common integrated crust, or a common flange-type coupling crust.
  • the main valve stem 3 and the main valve core can adopt the usual solid coupling, such a valve can be a ball valve, etc .; it can also use the usual rotary coupling, the corresponding main valve core is a reciprocating type.
  • Such a knotted valve may be a gate valve, a gate valve, or the like, or a valve capable of passing the pig of the present inventor.
  • the control cylinder 4 is a conventional cylindrical hydraulic cylinder.
  • the cylinder inside the control cylinder has a usually scabbed cylinder
  • the control piston 5 is shaped like a coil spring 6 for returning the control piston to a cylinder cavity at the left end of the control piston.
  • the extended end of the control rod 7 connected to the control piston is made into a rack 8.
  • the control cylinder has a cylinder port 9 and a cylinder port 10 at the right end, and a cylinder port 11 at the left end.
  • the cylinder port 9 is provided with a normal reverse damping regulating valve, and communicates with the pressure storage cylinder 16 through a pipeline 60.
  • the cylinder port 10 is equipped with a normal solenoid valve, and communicates with the fluid pipe 2 through a pipeline 12.
  • Cylinder port 11 is equipped with a normal solenoid valve or a reverse damping regulating valve.
  • the valves of each cylinder port can also be replaced with manual valves such as manual gate valves.
  • the control cylinder 4 is placed horizontally above the main valve, and is fixedly integrated with the hydraulic cylinder by common scabbing.
  • the control rod 7 connected to the control piston is perpendicular to the main valve rod 3, and a gear 13 meshed with the rack 8 is fixed on the main valve rod. Therefore, the main valve stem 3 can perform a rotational movement with the reciprocating motion of the control lever 7.
  • a base 14 is fixed at a proper position of the fluid tube 2 and can be made into a proper shape.
  • the base is fixedly connected to the outside of the fluid tube.
  • a concave cavity 15 is formed at the bottom thereof.
  • the shape of the four cavity 15 and the opening formed on the fluid tube are formed. The shapes match.
  • a tube hole communicating with the cavity and used for fitting the flow control tube 20 is formed in the middle of the base 14.
  • the pressure storage cylinder 16 can be made into a cylindrical tank and stacked on the base to be integrated with the base.
  • the cylinder cavity of the pressure storage cylinder communicates with the tube hole of the base.
  • An ordinary gas-filled airbag 17 is installed in the cylinder cavity of the pressure storage cylinder.
  • the cylinder port of the pressure storage cylinder is connected to the cylinder port 9 of the control cylinder via a line 60, so that the pressure storage red 16 and the control cylinder 4 communicate with each other.
  • the current sensor 18 is a T-shaped tubular crust, which has a circular tube-shaped current tube 19 extending along the direction of the fluid tube, and a circular tube-shaped flow control tube 20 which is perpendicular to the current tube.
  • the current sensing tube 19 is disposed at the center of the fluid tube and communicates axially with the fluid tube.
  • the upper part of the flow control tube 20 is a solid cylinder.
  • a valve seat 21 is formed by two cylindrical holes intersecting each other.
  • a cylindrical valve core 22 is provided in the current-sensing tube to slidably cooperate with the valve seat to open and close.
  • the current-sensing tube has a spiral return spring 23 on each side of the valve core 22, so that the current-sensing device has a bidirectional flow-sensing function for the forward and reverse fluid. It is also possible to install a return spring 23 on only one side of the valve element. Such a crusted current sensor has a unidirectional flow sensing function.
  • the current-sensing tube of the current sensor] 9 is installed in the fluid tube 2, preferably at the center of the streamline, and the flow-control tube 20 extends upward through the fluid tube, the cavity 15 of the base and the tube hole to reach the storage pressure.
  • the cylinder cavity of the cylinder 16 and the solid cylindrical part of the flow control tube 20 extend upwards and pass through the pressure storage cylinder.
  • a common seal is installed between the flow control pipe and the base pipe hole and the cylinder shell of the pressure storage cylinder to prevent fluid from leaking out.
  • An elongated through-hole 24 extending along the axis of the flow control tube is formed on the wall of the flow control tube 20 and communicates with the lumen of the flow control tube.
  • the hydraulic cylinder 25 is a conventional cylindrical hydraulic cylinder. The hydraulic cylinder is placed on the pressure storage cylinder and is made into an integrated crust with the pressure storage cylinder 16.
  • the piston 26 in the hydraulic cylinder is connected to the solid cylindrical part of the flow control tube 20 of the flow sensor 18, and the flow control tube is not in communication with the hydraulic cylinder.
  • the upper cavity 27 is above the piston 26.
  • the lower cavity 28 is below the piston.
  • Both the upper cavity and the lower cavity of the hydraulic cylinder are provided with a cylinder port.
  • the side of the hydraulic cylinder is fixedly integrated with the control cylinder 4.
  • the bypass valve 29 is a two-position multi-port piston valve, which has a cylindrical casing and a cylindrical spool 34 which reciprocates in the casing, and is placed on the fluid pipe 2 on the upstream side of the main valve 1.
  • An upper cavity connection 30, a lower cavity connection 31, a fluid pipe connection 32 and an atmospheric connection 33 are formed on the bypass valve housing.
  • the pass valve core 34 in the housing is fixedly connected to the round rod-shaped pass valve stem 35, and the lower end of the pass valve stem 35 extends into the fluid pipe at an appropriate depth, and is installed so that the traveling pig 58 can push the pass valve stem Thereby, the spool 34 is passed.
  • a sealing crust should be provided between the passage valve stem 35 and the fluid pipe 2.
  • the bypass valve core 34 is formed with a passage 36 that can connect the lower cavity interface 31 and the fluid pipe interface 32 when it is placed on the upper cavity of the bypass valve, and can connect the upper cavity interface 30 and the atmospheric interface 33 at the same time.
  • the relief valve 37 of the bypass valve 34 is also formed with a reset channel 38 that can connect the upper cavity interface 30 and the fluid pipe interface 32 when it is placed in the lower cavity of the bypass valve, and can also connect the lower cavity interface at the same time. 31 With the pressure relief channel 39 of the atmospheric interface 33.
  • the upper cavity interface 30 is connected to the upper cavity 27 of the hydraulic cylinder 25 and the cylinder port 11 of the control cylinder 4 through a pipeline 40.
  • the lower cavity connection 31 is connected to the lower cavity 28 of the hydraulic cylinder by a line 41.
  • the fluid pipe interface 32 is connected to the fluid pipe 2 through a pipeline, and the atmospheric interface 33 can be connected to the atmosphere through the pipeline or a reservoir 42 is arranged below the pipeline, so that the hydraulic cylinder 25 can be communicated with the fluid pipe or the atmosphere by using a bypass valve.
  • Two-way control valves can be installed on the cylinder ports of the upper and lower chambers of the hydraulic cylinder or on the corresponding pipelines.
  • the two-way regulating valve can be an existing differential flow adjustable shuttle valve of the present inventor, which is used for regulating the forward and reverse fluid flow in the pipeline.
  • the scoop of the bypass valve can also be a two-position multi-port valve with the spool rotating. When using this scaffold, the normal spool drive should be used accordingly.
  • the hydraulic holding cylinder 43 is a traditional cylindrical piston hydraulic cylinder structure, which is stacked on the top of the through valve 29 to form an integrated structure. The two share a common shell and are separated by a partition plate 44. The hydraulic holding cylinder 43 and the port valve 29 may be separated.
  • the holding piston 45 of the hydraulic holding cylinder is connected to the bypass spool 34 of the bypass valve by a connecting rod 46 extending downward through the partition plate 44. There should be a sealing scab between the connecting rod 46 and the partition 44.
  • a return coil spring 47 is provided in the cylinder chamber above the holding piston 45.
  • the reset valve 48 is a two-position three-way piston valve, which has a cylindrical casing and a cylindrical valve core 49 that reciprocates in the casing, and is placed on the fluid pipe 2 on the upstream side of the main valve 1.
  • Reset valve The front end of the round rod-shaped reset valve stem 50 to which the core 49 is connected extends into the fluid pipe at an appropriate depth, and is arranged so that the traveling pig 58 can push the reset valve stem 50 to reset the valve core 49.
  • a sealing crust should be provided between the reset valve stem 50 and the fluid pipe.
  • an atmospheric port 51 is formed, which communicates with the valve cavity below the reset valve core.
  • a cylinder port 52 is formed, which communicates with the valve cavity above the reset valve core.
  • the air port 51 When the lower part is closed, the air port 51 is connected to the cylinder port 52 through the valve cavity above the reset valve core, and when the reset valve is placed in the middle and the cylinder port 52 is closed, the air chamber 51 is connected to the air port 51 through the valve cavity below the reset valve core.
  • the cylinder port 52 is connected to the lower chamber 28 of the hydraulic cylinder 25 by a pipeline 54, and the cylinder port 52 may also be directly connected to the lower chamber interface 31 of the access valve 29 by a pipeline 54.
  • the cylinder port 53 is connected to a cylinder cavity below the holding piston 45 of the hydraulic holding cylinder 43 through a pipeline 55.
  • a coil spring 56 for resetting is provided in a valve chamber above the reset valve core 49 of the reset valve 48. There may be a reservoir 57 below the atmospheric port 51.
  • the protection device of the present invention is particularly suitable for pipeline blasting leakage in long-distance pipelines for fluid transportation.
  • the fluid pressure pipe is self-closed; the same is particularly suitable for passing pigs 58 when cleaning fluid pipelines.
  • the main valve 1 When the protection device of the present invention is in a working state for conveying fluid, the main valve 1 is fully opened, the valve core 22 of the current sensor 18 and the valve seat 21 are closed and matched, that is, the current sensor is closed, and the control piston 5 in the control cylinder 4 It is placed in the right part of the cylinder body, and the solenoid valve controlling the red port 10 of the cylinder 4 is in a closed state, that is, the cylinder port 10 is closed.
  • the passing spool 34 of the passing valve 29 and the holding piston 45 in the hydraulic holding cylinder 43 connected via the connecting rod 46 are placed at the lower part of the inner cavity of the respective housing.
  • the through valve stem 35 extends into the fluid pipe 2 at a proper depth, and the reset channel 38 on the through valve core connects the fluid pipe interface 32 with the upper cavity interface 30, so that the fluid pipe 2 passes the through valve, the pipeline 40 and the hydraulic cylinder.
  • the upper cavity 27 of 25 is communicated, so that the pressure of the upper cavity of the hydraulic cylinder is approximately the same as the pressure of the fluid pipe; the pressure relief channel 39 connects the lower cavity interface 3 1 with the atmospheric interface 33, so that the lower cavity of the hydraulic cylinder is connected via the pipeline 41 28 communicates with the outside atmosphere, so that the pressure in the lower chamber is atmospheric pressure, that is, the pressure in the upper chamber 27 is greater than the pressure in the lower chamber 28.
  • the reset wide core 49 of the reset valve 48 is placed at the lower part of the inner cavity of the housing, and the reset valve stem 50 projects into the fluid pipe 2 to an appropriate depth.
  • the valve cavity above the reset valve core communicates with the lower cavity 28 of the hydraulic cylinder and the cylinder cavity below the holding piston 45 of the hydraulic holding cylinder 43 through the cylinder port 52 and the cylinder port 53 respectively.
  • the valve core 22 of the current sensor 18 and the valve seat 21 are closed and matched, that is, the current sensor is closed.
  • the cylinder port 9 on the right end of the control cylinder 4 is closed due to the current sensor being closed, and the cylinder port 10 is closed.
  • the cylinder port 1 on the left end is connected to the fluid pipe 2 through the pipeline 40, the reset channel 38 of the access valve, and the fluid in the fluid pipe.
  • the fluid pipe interface 32 of 29, the reset channel 38, and the upper cavity interface 30 enter the pipeline 40, and the fluid entering the pipeline 40 is then divided into two paths: one way enters the upper cavity 27 through the cylinder port of the hydraulic cylinder 25, so that the piston 26 is placed at the The lower part of the hydraulic cylinder, so as to ensure that the current sensing tube 19 of the current sensor 18 is located at the center of the flow line of the fluid tube; the other path, the cylinder port 11 enters the left end of the control cylinder 4, and the control piston 5 is placed in the cylinder block. Inside right, ensure that the main valve 1 is fully open.
  • the flow velocity of the fluid in the fluid tube increases sharply, and the high-speed fluid impacts the valve core 22 in the current sensor.
  • the fluid in the fluid pipe 2 flows from left to right in the forward direction or from the right to the left in the reverse direction, whether it is a fluid pipe burst leak at the right end of the main valve 1 or a fluid pipe burst leak at the left end of the main valve, protection
  • the devices can achieve pipeline protection.
  • the high-speed fluid enters the sensor 18 from the left end, pushes the spool 22 to the right, and compresses the return spring 23 on the right side of the spool; when the fluid flows in the reverse direction, the high-speed fluid enters the sensor from the right end 18.
  • the above-mentioned high-speed fluid in both the forward and reverse directions can open the valve core and the valve seat, that is, the current sensor 18 is opened.
  • the fluid enters the pressure storage cylinder 16 through the sense tube 19, the valve seat 21, and the control tube 20 and compresses the airbag 17 in the pressure storage cylinder.
  • the fluid entering the pressure storage cylinder passes through the pipeline 60 and the control port 9 to the control cylinder.
  • the kinetic energy of the fluid in the center of the streamline in the fluid pipe is greater than the kinetic energy of the boundary fluid, so the piston 5 is controlled to go left and press under the pressure difference between the fluid in the right and left cylinders.
  • the spring 6 is contracted, so the fluid in the left-end cylinder cavity of the control cylinder 4 is discharged into the fluid pipe 2 through the cylinder port 11, the pipeline 40, and the reset channel 38 of the access valve 29.
  • the control rod 7 follows the control piston 5 to the left, and the gear 13 is driven by the rack 8 on the control rod so that the main valve rod 3 rotates, and the main valve 1 is closed.
  • the flow velocity and pressure in the fluid pipe gradually decrease, and the valve core 22 of the current sensor 18 is gradually closed by the action of the return spring 23.
  • the airbag 17 releases the pressure and expands, and presses the fluid in the pressure storage cylinder into the control cylinder to further advance the control piston 5 to ensure the reliability of the main valve.
  • the ground is completely closed and the fluid in the fluid pipe is cut off to achieve pipeline protection.
  • the valve core 22 in the current sensor 18 is reset by the return spring 23, the valve core 22 and the valve seat 21 are closed, and the current sensor 18 is closed.
  • the right cylinder port 10 of the control cylinder is opened under the control of the solenoid valve, and the cylinder port 9 is closed due to the closing of the current sensor.
  • the control piston 5 moves to the right under the action of the return spring 6, so that the fluid in the right-hand end of the cylinder 4 is discharged into the fluid pipe 2 through the cylinder port 10 and the pipeline 12.
  • the pressure fluid in the fluid pipe 2 passes through the passage valve.
  • the reset channel 38, the pipeline 40, and the cylinder port 11 at the left end of the control cylinder enter the left end cylinder cavity of the control cylinder 4.
  • the control rod 7 returns to the right, the rack 8 on the control rod drives the gear 13 in the reverse direction so that the main valve rod 3 is reversed, the main valve 1 is reset and opened until it is fully opened, and the system recovers.
  • FIG. 2 shows a state in which the fluid transfer line is cleaned by the pig 58.
  • the through valve stem 35 is pushed up, so that the through valve core 34 is raised to the upper part of the inner cavity of the housing, and the hydraulic holding cylinder is connected through the connecting rod 46
  • the holding piston 45 of 43 rises to the upper part of the housing cavity.
  • the reset channel 38 and the pressure relief channel 39 on the bypass spool 34 are cut off at the same time, while the flow channel 36 connects the fluid pipe interface 32 and the lower cavity interface 31, and the same pressure relief channel 37 connects the upper cavity interface 30 and the atmospheric interface 33 Connected.
  • the pressure fluid in the fluid tube 2 enters the lower cavity 28 of the hydraulic cylinder 25 through the fluid tube interface 32, the passage 36, the lower cavity interface 31, and the pipeline 41 of the bypass valve, so that the fluid pressure in the lower cavity and the fluid tube 2
  • the cylinder port 11 of the control cylinder 4 is closed under the control of a solenoid valve or a reverse damping regulating valve, and the fluid in the upper chamber 27 of the hydraulic cylinder is discharged through the pipeline 40, the upper chamber interface 30 of the bypass valve, and drained.
  • the pressure channel 37 and the air interface 33 are connected to the outside atmosphere, so that the pressure in the upper chamber 27 of the hydraulic cylinder is atmospheric pressure, that is, the pressure in the lower chamber of the hydraulic cylinder is greater than the pressure in the upper chamber.
  • the reset valve stem 50 of the reset valve 48 still extends into the fluid pipe 2, and the reset valve core 49 of the reset valve 48 is still placed in the lower part of the inner cavity of the housing.
  • a small amount of pressure fluid entering the lower chamber 28 of the hydraulic cylinder enters the cylinder below the holding piston 45 of the hydraulic holding cylinder 43 through the line 54, the cylinder port 52 of the reset valve, the valve cavity above the reset spool, the red port 53 and the line 55. Cavity, so that the holding piston and the passing spool 34 of the connecting valve connected to the holding piston via the connecting rod 46 are maintained at the upper positions of the inner chambers of the respective housings, so as to keep the flow path of the fluid pipe 2 to the lower chamber 28 of the hydraulic cylinder in a path state .
  • the pressure fluid in the fluid tube 2 continuously enters the lower cavity 28 of the hydraulic cylinder, and the piston 26 is pushed up by the fluid to be placed in the upper part of the hydraulic cylinder, and the fluid is lifted by the control tube 20 of the current sensor 18 and caused to flow.
  • the flow-sensing tubes 19 all enter the cavity 15 of the base 14 to allow the moving pig to pass smoothly. At this time, the system is in a pig-passing state.
  • the holding piston 45 goes down and resets, and the passing spool 34 of the going valve 29 is driven by the connecting rod 46 to go down and reset.
  • the piston 26 in the hydraulic cylinder 25 is reset downward, and then the inductor is driven to reset by the flow control tube 20 of the current sensor 18, and the reset valve core 49 is also reset downward by the spring 56 .
  • the system restores the working state of fluid delivery, and the cylinder port 11 of the control cylinder is opened under the control of a solenoid valve or a reverse damping regulating valve.
  • the cylinder port 10 of the control cylinder 4 since the cylinder port 10 of the control cylinder 4 is connected to the fluid pipe 2 through the pipeline 12, its special advantage is: during operation, the fluid in the right-side cylinder cavity of the control cylinder 4 is discharged into the fluid pipe 2 without The fluid will be discharged to the outside world, so as to prevent the fluid from polluting the environment and reduce the loss of fluid discharge.
  • the pipeline 12 connected to the cylinder port 10 of the control cylinder 4 can communicate with the atmosphere, or a reservoir is installed at the outlet of the pipeline, so that the fluid discharged from the control cylinder is discharged into the reservoir.
  • FIG. 3 A second embodiment of the self-supporting ball-type pipeline blast protection device of the present invention is shown in FIG. 3, and its structure is basically the same as that of embodiment 1, and its operation is also basically the same.
  • the crusting characteristics of the self-supporting ball-type pipeline blasting protection device of this embodiment are as follows: a current sensor 18 is provided in the main valve 1, and a pressure storage cylinder 16 and a hydraulic cylinder 25 are stacked on the main valve 1 to form an integrated crust.
  • the control cylinder 4 is fixedly connected with the upper left end of the main valve and the pressure storage cylinder by a common structure.
  • the main valve 1 can be a ball valve, a butterfly valve or a gate valve. When a ball valve is used, a concave cavity 15 is formed at the top of the inner cavity flow path of the main valve core 59 having a spherical shape, which can accommodate the current sensing tube 19 of the current sensor 18.
  • the main valve stem 3 of the main valve is made into a circular tube shape, and the lumen of the circular tube penetrates the flow path of the main valve core 59.
  • the flow control tube of the current sensor is slidably fitted in the lumen of the main valve stem, and a sealing structure is provided between the flow control tube and the lumen.
  • the cylinder port 11 of the control cylinder 4 may directly communicate with the fluid pipe through a pipeline; in addition, the control cylinder 4 may not be provided with the cylinder port 11. In addition, the pressure storage cylinder 16 may not be provided, and the flow control pipe 20 may be directly communicated with the control cylinder through the cylinder port 9 of the control cylinder 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

L'invention concerne dispositif de protection automatique contre l'éclatement de canalisations. Ce dispositif comprend une valve principale, un premier dispositif de commande permettant d'ouvrir ou obturer la valve principale, un capteur de débit servant à détecter le fluide contenu dans le tuyau et un dispositif de commande destiné à commander le déplacement dudit capteur de débit.
PCT/CN2001/000138 2000-03-27 2001-02-22 Dispositif de protection automatique contre l'eclatement de canalisations WO2001075356A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39095/01A AU3909501A (en) 2000-03-27 2001-02-22 A pipe burst protect device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN00112796.9 2000-03-27
CN00112796 2000-03-27

Publications (1)

Publication Number Publication Date
WO2001075356A1 true WO2001075356A1 (fr) 2001-10-11

Family

ID=4582632

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2001/000138 WO2001075356A1 (fr) 2000-03-27 2001-02-22 Dispositif de protection automatique contre l'eclatement de canalisations

Country Status (3)

Country Link
CN (1) CN1148524C (fr)
AU (1) AU3909501A (fr)
WO (1) WO2001075356A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013117105A1 (fr) * 2012-02-10 2013-08-15 福建合众机械有限公司 Structure d'arbres d'entraînement
CN112503287A (zh) * 2020-11-27 2021-03-16 江苏盐阜电站阀门辅机制造有限公司 一种用于减温减压阀的消声器
CN113953074A (zh) * 2021-10-22 2022-01-21 福州大学 爆炸压力释放补偿装置
CN115355339A (zh) * 2022-10-19 2022-11-18 潍坊市凯隆机械有限公司 一种自动泄压装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8166998B2 (en) * 2006-12-21 2012-05-01 Pollectric International Pty Ltd Multiple valve assembly for reducing water loss from a leak
US9803774B2 (en) * 2015-10-02 2017-10-31 Fisher Controls International Llc Flow control valve having a motion conversion device
CN112066130A (zh) * 2020-09-11 2020-12-11 马艺卓 一种管道转向接头的内部冲击缓解机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100932A (en) * 1975-09-19 1978-07-18 P.D. Rasspe Soehne Pipe burst safety device for natural gas pipe lines or the like
EP0559993A1 (fr) * 1992-03-09 1993-09-15 Ente Nazionale Per L'energia Elettrica - (Enel) Système de détection d'une rupture soudaine dans une canalisation dans laquelle s'écoule un liquide sous pression
CN1024040C (zh) * 1989-05-02 1994-03-16 褚志富 电站压力管道爆破保护系统
CN2175403Y (zh) * 1993-12-11 1994-08-24 曾祥炜 梭式管道爆破保护器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100932A (en) * 1975-09-19 1978-07-18 P.D. Rasspe Soehne Pipe burst safety device for natural gas pipe lines or the like
CN1024040C (zh) * 1989-05-02 1994-03-16 褚志富 电站压力管道爆破保护系统
EP0559993A1 (fr) * 1992-03-09 1993-09-15 Ente Nazionale Per L'energia Elettrica - (Enel) Système de détection d'une rupture soudaine dans une canalisation dans laquelle s'écoule un liquide sous pression
CN2175403Y (zh) * 1993-12-11 1994-08-24 曾祥炜 梭式管道爆破保护器

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013117105A1 (fr) * 2012-02-10 2013-08-15 福建合众机械有限公司 Structure d'arbres d'entraînement
CN112503287A (zh) * 2020-11-27 2021-03-16 江苏盐阜电站阀门辅机制造有限公司 一种用于减温减压阀的消声器
CN112503287B (zh) * 2020-11-27 2023-06-27 江苏盐阜电站阀门辅机制造有限公司 一种用于减温减压阀的消声器
CN113953074A (zh) * 2021-10-22 2022-01-21 福州大学 爆炸压力释放补偿装置
CN113953074B (zh) * 2021-10-22 2022-09-30 福州大学 爆炸压力释放补偿装置
CN115355339A (zh) * 2022-10-19 2022-11-18 潍坊市凯隆机械有限公司 一种自动泄压装置
CN115355339B (zh) * 2022-10-19 2023-01-13 潍坊市凯隆机械有限公司 一种自动泄压装置

Also Published As

Publication number Publication date
AU3909501A (en) 2001-10-15
CN1419643A (zh) 2003-05-21
CN1148524C (zh) 2004-05-05

Similar Documents

Publication Publication Date Title
WO2001073339A1 (fr) Dispositif de protection contre l'eclatement de tubes de canalisation
WO2001075356A1 (fr) Dispositif de protection automatique contre l'eclatement de canalisations
AU749842B2 (en) Improved automatic drain valve
CA2309521A1 (fr) Appareil de reglage du debit
KR100238498B1 (ko) 진공 하수 운반시스템용 섬프 배기 제어기 메커니즘
JPH07253175A (ja) 負圧操作式遮断弁のための制御装置
US6857442B1 (en) Freeze protection device for wall hydrants/faucets
US10006555B2 (en) Fluid discharge valve
WO2000070251A1 (fr) Soupape a element a mouvement alternatif de type tuyau de vidange pour la commande d'un liquide
JP2008075860A (ja) スイング逆止弁
CN2416340Y (zh) 自力式管道爆破保护器
CN112032120B (zh) 一种具有气动延时换向模块的分级联动控制系统
NO325892B1 (no) Vannkran
US6523564B1 (en) Above ground overfill valve
WO2000070250A1 (fr) Soupape de commande
JP3939120B2 (ja) 緊急遮断弁装置
CN101759036B (zh) 一种便捷的接收方法及装置
CN205396119U (zh) 一种易操作的具有远程缓解功能的停放制动控制单元
KR102567213B1 (ko) 단동식 진공청소기 저장탱크 자동 개폐장치
CN219530187U (zh) 一种自力通球式管道爆破保护装置
US3845508A (en) Water closet control system
CN2416339Y (zh) 自力通球式管道爆破保护器
JP3787305B2 (ja) 消防自動車、及びその消防ポンプの運転方法
CN214946635U (zh) 一种液压阀控制设备
CN113669491A (zh) 一种智能温控保护的水龙头连接阀

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ CZ DE DE DK DK DM DZ EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWE Wipo information: entry into national phase

Ref document number: 018072291

Country of ref document: CN

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP