CN112879627B - Multi-redundancy-proportion pilot-operated safety water hammer relief valve directly driven by vane motor - Google Patents

Multi-redundancy-proportion pilot-operated safety water hammer relief valve directly driven by vane motor Download PDF

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Publication number
CN112879627B
CN112879627B CN202110173374.3A CN202110173374A CN112879627B CN 112879627 B CN112879627 B CN 112879627B CN 202110173374 A CN202110173374 A CN 202110173374A CN 112879627 B CN112879627 B CN 112879627B
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China
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valve
vane motor
external thread
special
shaped external
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CN202110173374.3A
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CN112879627A (en
Inventor
田中山
杨昌群
杨芮庚
王现中
王永飞
牛道东
赵升吨
史铁峰
李育特
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Xian Jiaotong University
China Oil and Gas Pipeline Network Corp South China Branch
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Xian Jiaotong University
China Oil and Gas Pipeline Network Corp South China Branch
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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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/168—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side combined with manually-controlled valves, e.g. a valve combined with a safety valve
    • 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
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
    • 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

Abstract

The invention relates to the technical field of water hammer relief valves, in particular to a multi-redundancy proportion pilot-operated safety type water hammer relief valve directly driven by a vane motor, which comprises a hand wheel, the vane motor, a proportion pilot valve, a mechanical pilot valve, a controller, a pressure sensor, an angle sensor, a valve cover and a main valve body, wherein one end of a special-shaped external thread plug is in sealing fit with the main valve body, the special-shaped external thread plug is rotatably connected with the valve cover, and the vane motor is used for driving the special-shaped external thread plug to rotate; the oil circuit of the main valve body and the vane motor is provided with a proportional pilot valve, a mechanical pilot valve, a first stop valve and a second stop valve; the controller can control the proportional pilot valve to realize reversing according to the pressure value; the proportional pilot valve can be controlled to increase the flow passing through the working port and increase the lifting height of the special-shaped external thread plug. The invention provides a multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by a vane motor, which solves the problem that the size of a valve opening cannot be accurately controlled in the conventional relief valve.

Description

Multi-redundancy-proportion pilot-operated safety water hammer relief valve directly driven by vane motor
Technical Field
The invention relates to the technical field of water hammer relief valves, in particular to a multi-redundancy-ratio pilot-operated safety water hammer relief valve directly driven by a vane motor.
Background
In a long-distance petroleum pipeline, water hammer can be caused by conditions such as accidental pump stop or abnormal opening and closing of a valve, and pipe explosion accidents can be caused by local overpressure in the pipeline. In order to ensure safe operation of long oil pipelines and associated equipment, surge relief valves are typically used to relieve surge pressure.
When water hammer occurs in the pipeline, the pressure release valve can be quickly opened and releases high-pressure medium, so that the pressure of the pipeline is restored to a normal range, and the purpose of protecting the pipeline and equipment in the pipeline is achieved. Therefore, the opening speed of the pressure release valve in the water hammer is of great significance to the safe operation of the whole pipeline.
At present, the traditional water hammer relief valve mainly comprises three structural forms of an angle type, an axial flow type and a Y type. The normal action of the main valve is ensured by the pressure change in the valve cavity of the main valve and the spring of the main valve in principle. It has the following disadvantages:
1. the main valve cavity is communicated with the front pipeline and the rear pipeline through the pilot valve, liquid in the main valve cavity needs to be discharged during action and is limited by the structure of the pilot valve and the diameter of the pressure guiding pipe, and the liquid discharging speed in the main valve cavity is low, so that the main valve cannot be opened quickly;
2. oil liquid needs to flow through the main valve cavity, so that the requirement on a liquid medium is high, and a filter needs to be installed, so that the traditional hydraulic surge relief valve can only be used for a long oil pipeline, and the application scene is limited;
3. because of the existence of the main valve spring, the valve core vibrates during working, the abrasion of the valve core is intensified, and the service life is short.
Disclosure of Invention
The invention provides a multi-redundancy-proportion pilot-operated safety water hammer pressure release valve directly driven by a vane motor, which aims to solve the problem that the size of a valve opening cannot be accurately controlled in the conventional pressure release valve.
The technical scheme for solving the problems is as follows: a multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by a vane motor comprises a hand wheel, the vane motor, a proportional pilot valve, a mechanical pilot valve, a controller, a pressure sensor, an angle sensor, a valve cover and a main valve body;
the bottom of the hand wheel is provided with a special-shaped external thread plug, one end of the special-shaped external thread plug sequentially penetrates through the vane motor and the valve cover from top to bottom, extends into the main valve body and is in sealing fit with the main valve body, the special-shaped external thread plug is rotatably connected with the valve cover, and the vane motor is used for driving the special-shaped external thread plug to rotate;
the included angle between the special-shaped external thread plug and the axis of the oil inlet of the main valve body is 90 degrees;
oil inlets of the proportional pilot valve and the mechanical pilot valve are connected in series and then connected with an oil inlet of the main valve body through a first stop valve, and oil outlets of the proportional pilot valve and the mechanical pilot valve are connected to an oil outlet of the main valve body; a first oil port of the vane motor is connected to one working port of the proportional pilot valve and the mechanical pilot valve through a first pipeline, a second oil port of the vane motor is connected to the other working port of the proportional pilot valve and the mechanical pilot valve through a second pipeline, and a second stop valve is arranged between the first pipeline and the second pipeline;
the pressure sensor is used for acquiring a pressure value at an inlet of the main valve body and transmitting the pressure value to the controller, and the controller controls the proportional pilot valve to realize reversing according to the pressure value;
the angle sensor is used for measuring the rotation angle of the special-shaped external thread plug and transmitting the rotation angle signal to the controller, the controller judges whether the pressure relief requirement corresponding to the pressure value at the moment can be met according to the rotation angle, if the pressure relief requirement cannot be met, the controller can control the proportional pilot valve to increase the working port to pass through the flow, and the lifting height of the special-shaped external thread plug is increased.
Preferably, the vane motor comprises an upper cavity, a lower cavity and a base, wherein one end of the lower cavity is connected with the base, and the other end of the lower cavity is connected with the upper cavity; the upper cavity and the lower cavity are respectively provided with a first oil port and a second oil port, and the first oil port and the second oil port are symmetrically arranged relative to the axis of the vane motor;
the stator comprises a lower cavity and an upper cavity, wherein the lower cavity and the upper cavity are sequentially internally provided with an upper oil distribution disc, a stator ring and a lower oil distribution disc, a rotor is arranged inside the stator ring, and a plurality of blades are uniformly distributed on the outer wall of the rotor.
Preferably, the rotor is sleeved on the outer wall of the special-shaped external thread plug and is connected with the special-shaped external thread plug through a spline.
Preferably, the valve cover comprises a sealing end cover and a supporting cylinder, threads are formed in two ends of the supporting cylinder, one end of the supporting cylinder is connected with the special-shaped external thread plug through an internal thread, and the other end of the supporting cylinder is connected with the sealing end cover through an external thread.
Preferably, a first sealing ring is arranged between the outer wall of the special-shaped external thread plug and the inner wall of the supporting cylinder; the support is connected with the main valve body through threads, and a second sealing ring is installed at the meshing position of the support cylinder and the internal threads of the main valve body.
Preferably, the hand wheel is connected with the special-shaped external thread plug through a nut, and a gasket is arranged between the nut and the hand wheel.
Preferably, the lower oil distribution disc is provided with a sealing ring at a contact part with the lower cavity body.
Preferably, the upper cavity is provided with a sealing ring at the contact part with the lower cavity.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention can accurately sense the water hammer in the main oil circuit through the pressure sensor arranged on the main valve body, control the opening size of the valve through the controller and the proportional pilot valve, detect the opening of the valve through the angle sensor, control the quick and accurate action of the pressure release valve and complete the pressure release.
2) Adopt mechanical type pilot valve and proportion pilot valve to constitute redundant control simultaneously, improved the operational reliability of water hammer relief valve, when the proportion pilot valve breaks down, still can accomplish the pressure release through mechanical type pilot valve to the proportion pilot valve can control the flow of flowing through the vane motor, realizes opening the control of size to the valve, can also constitute closed-loop control circuit through angle sensor and controller, judges whether first oil circuit operation is normal.
3) Meanwhile, the valve is opened and closed in a manual mode of a vane motor and a hand wheel, the vane motor can output large-torque force to realize accurate opening of the valve, and when the vane motor fails, the stop valve can be opened, then the hand wheel is manually rotated to open the pressure release valve, and the reliability is further improved.
4) Adopt pressure sensor to carry out the detection of water hammer phenomenon to transmit monitoring data to the controller and handle, then control proportion pilot valve and move, accomplish the pressure release, and can carry out the state control of relief valve through long-range, be convenient for realize the intelligent control of water hammer relief valve.
Drawings
Fig. 1 is a schematic structural view of a water hammer relief valve in the absence of water hammer according to the present invention.
Fig. 2 is a schematic structural diagram of the water hammer relief valve in the presence of water hammer according to the present invention.
Fig. 3 is a schematic structural view of the vane motor of the present invention.
In the figure: 1. the main valve body, 2, a support cylinder, 3, a special-shaped external thread plug, 4, a first sealing ring, 5, a second sealing ring, 6, a sealing end cover, 7, a vane motor, 71, a base, 72, a bolt, 73, a lower cavity, 74, a lower oil distribution disc, 75, a stator ring, 76, a rotor, 77, a vane, 78, an upper oil distribution disc, 79, an upper cavity, 8, a hand wheel, 9, a gasket, 10, a nut, 11, a pressure sensor, 12, a controller, 13, a proportional pilot valve, 14, a first stop valve, 15, a mechanical pilot valve, 16, a second stop valve, 17 and an angle sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Example 1: a multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by a vane motor comprises a hand wheel 8, a vane motor 7, a sealing end cover 6, a supporting cylinder 2, a proportional pilot valve 13, a mechanical pilot valve 15, a controller 12, a pressure sensor 11, an angle sensor 17 and a main valve body 1; the bottom of the hand wheel 8 is provided with a special-shaped external thread plug 3, one end of the special-shaped external thread plug 3 sequentially penetrates through the vane motor 7, the support cylinder 2 and the sealing end cover 6 from top to bottom, extends into the main valve body 1 and is in sealing fit with the main valve body 1, and one end of the support cylinder 2 is meshed with the special-shaped external thread plug 3 through an internal thread; the blade motor 7 is used for driving the special-shaped external thread plug 3 to rotate.
Oil inlets of the proportional pilot valve 13 and the mechanical pilot valve 15 are connected in series and then connected with an oil inlet of the main valve body 1 through a first stop valve 14, and oil outlets of the proportional pilot valve 13 and the mechanical pilot valve 15 are connected with an oil outlet of the main valve body 1; a first oil port of the vane motor 7 is connected to one working port of the proportional pilot valve 13 and one working port of the mechanical pilot valve 15 through a first pipeline, a second oil port of the vane motor 7 is connected to the other working port of the proportional pilot valve 13 and the other working port of the mechanical pilot valve 15 through a second pipeline, and a second stop valve 16 is arranged between the first pipeline and the second pipeline.
A pressure sensor 11 is arranged at an oil inlet of the main valve body 1, and an angle sensor 17 is arranged between the vane motor 7 and the sealing end cover 6. The pressure sensor 11 is used for acquiring a pressure value at an inlet of the main valve body 1 and transmitting the pressure value to the controller 12, and the controller 12 controls the proportional pilot valve 13 to realize reversing according to the pressure value.
The angle sensor 17 is used for measuring the rotation angle of the special-shaped external thread plug 3, and transmits the rotation angle signal to the controller 12, the controller 12 judges whether the pressure relief requirement corresponding to the pressure value at the moment can be met according to the rotation angle, if the pressure relief requirement does not meet, the controller 12 controls the proportional pilot valve 13 to increase the working port to pass through the flow, and the lifting height of the special-shaped external thread plug 3 is increased.
Referring to fig. 3, the vane motor 7 includes an upper chamber 79, a lower chamber 73 and a base 71, the lower chamber 73 is connected to the base 71 by three uniform bolts 72, a lower oil distribution disc 74, a stator ring 75 and an upper oil distribution disc 78 are all installed inside the chamber formed by the upper chamber 79 and the lower chamber 73, and the lower oil distribution disc 74 is sealed by a sealing ring at the contact position with the lower chamber 73; the stator ring 75 is installed on the upper part of the lower oil distribution disc 74, the rotor 76 is arranged inside the stator ring 75, twelve blades 77 are uniformly installed on the rotor 76, the upper oil distribution disc 78 is installed on the upper part of the stator ring 75 and fixed through bolts, and the upper cavity 79 is connected with the lower cavity 73 through bolts and sealed through sealing rings. The upper cavity 79 and the lower cavity 73 are respectively provided with a first oil port and a second oil port, and the first oil port and the second oil port are symmetrically arranged relative to the axis of the vane motor 7.
A first sealing ring 4 is arranged between the outer wall of the special-shaped external thread plug 3 and the inside of the supporting cylinder 2; a second sealing ring 5 is arranged at the meshing position of the external thread of the supporting cylinder 2 and the internal thread of the main valve body 1, and a sealing end cover 6 is arranged at the upper end of the first sealing ring 4; the spline part of the special-shaped external thread plug 3 is matched with the spline of the rotor 76 in the blade motor 7.
The working principle of the invention is as follows:
in the process of normally conveying oil in the pipeline, the water hammer relief valve is in a closed state, when the water hammer phenomenon occurs in the pipeline, the oil at the position where the water hammer occurs is compressed due to the volume, and the oil pressure rapidly rises and is transmitted along the pipeline. The inlet end of the main valve body 1 is connected with a main oil pipeline, and the outlet end of the main valve body is connected with an oil tank for receiving oil discharged by pressure relief.
When the main oil circuit has no water hammer, the pressure detected by the pressure sensor 11 is less than 10MPa, the proportional pilot valve 13 and the mechanical pilot valve 15 are in the left position, and the main valve body 1 oil circuit is in a closed state.
When water hammer occurs in the main oil path, the inlet pressure of the main valve body 1 is greater than 10MPa, the mechanical pilot valve 15 is in the right position, meanwhile, the oil pressure detected by the pressure sensor 11 is greater than 10MPa, and the controller 12 controls the working state of the proportional pilot valve 13 to be in the right position. The oil flows into the proportional pilot valve 13 and the mechanical pilot valve 15 from the main valve body 1 through the first stop valve 14, enters the first oil port of the upper cavity 79 of the vane motor 7 when flowing out of the proportional pilot valve 13 and the mechanical pilot valve 15, passes through the vane motor 7, flows back to the outlet oil path of the main valve body 1 through the proportional pilot valve 13 and the mechanical pilot valve 15 after passing through the second oil port on the lower cavity 73. When hydraulic oil passes through the vane motor 7, the rotor 76 of the vane motor 7 is pushed to rotate anticlockwise, the spline on the rotor 76 drives the special-shaped external thread plug 3 to rotate anticlockwise, the special-shaped external thread plug 3 is enabled to rise for a certain distance under the action of a lead screw formed between the special-shaped external thread plug 3 and the supporting cylinder 2, a valve in the main valve body 1 is enabled to be opened, liquid in a main oil way flows out through the main valve body 1, and pressure relief is completed. Simultaneously angle sensor 17 detects the actual angle of changeing of valve rod, pass the signal to controller 12, controller 12 judges the turned angle requirement when the angle that dysmorphism external screw thread end cap 3 actually rotated satisfies this pressure, if the angle undersize that actually rotates, controller 12 can control proportion pilot valve 13 increase working flow, increase 3 turned angle of dysmorphism external screw thread end cap, thereby it is adjustable to realize the valve opening area, make more high-pressure oil get into blade motor 7, and make 3 more angles that special-shaped external screw thread end cap rotated, the pressure-relieving capacity is improved.
The proportional pilot valve 13 and the mechanical pilot valve 15 are of redundant design, and when one of the two fails, the other ensures that the pressure relief valve is functioning properly.
When the blade motor 7 breaks down, can take manual mode, through opening second stop valve 16, the hydraulic fluid port switches on about making the blade motor 7, eliminates the negative pressure, through rotating hand wheel 8, makes special-shaped external screw thread end cap 3 anticlockwise rotation, and the valve in the main valve body 1 is opened, accomplishes the pressure release.
After the pressure relief is completed, the pressure of the oil path is less than 10MPa, the mechanical pilot valve 15 is in the left position, meanwhile, the controller 12 receives a signal from the pressure sensor 11 to make the proportional pilot valve 13 in the left position, the oil enters the proportional pilot valve 13 and the mechanical pilot valve 15 from the inlet of the main valve body 1 through the first stop valve 14, flows out from the proportional pilot valve 13 and the mechanical pilot valve 15 and enters the second oil port of the lower cavity 73 of the vane motor 7, and the oil flows out from the first oil port of the upper cavity 79 and then flows back to the outlet of the main valve body 1 through the proportional pilot valve 13. When hydraulic oil passes through the vane motor 7, the rotor 76 of the vane motor 7 is pushed to rotate clockwise, the spline on the rotor 76 drives the special-shaped external thread plug 3 to rotate clockwise, so that the special-shaped external thread plug 3 descends, a valve in the main valve body 1 is closed, and the oil is prevented from flowing out.
If the blade motor 7 fails after the pressure relief is completed, so that the valve cannot be closed, the second stop valve 16 can be opened, and the hand wheel 8 is rotated clockwise, so that the special-shaped external thread plug 3 rotates clockwise and descends, the valve is closed, and the pressure relief is stopped.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.

Claims (8)

1. The utility model provides a many redundant proportion pilot-operated safety type water hammer relief valve that vane motor directly driven which characterized in that: comprises a hand wheel (8), a vane motor (7), a proportional pilot valve (13), a mechanical pilot valve (15), a pressure sensor (11), an angle sensor (17), a controller (12), a valve cover and a main valve body (1);
the bottom of the hand wheel (8) is provided with a special-shaped external thread plug (3), one end of the special-shaped external thread plug (3) sequentially penetrates through a vane motor (7) and a valve cover from top to bottom, extends into the main valve body (1) and is in sealing fit with the main valve body (1), the special-shaped external thread plug (3) is rotatably connected with the valve cover, and the vane motor (7) is used for driving the special-shaped external thread plug (3) to rotate;
the included angle between the special-shaped external thread plug (3) and the axis of the oil inlet of the main valve body (1) is 90 degrees;
oil inlets of the proportional pilot valve (13) and the mechanical pilot valve (15) are connected in series and then are connected with an oil inlet of the main valve body (1) through a first stop valve (14), and oil outlets of the proportional pilot valve (13) and the mechanical pilot valve (15) are connected with an oil outlet of the main valve body (1); a first oil port of the vane motor (7) is connected to one working port of the proportional pilot valve (13) and one working port of the mechanical pilot valve (15) through a first pipeline, a second oil port of the vane motor (7) is connected to the other working port of the proportional pilot valve (13) and the other working port of the mechanical pilot valve (15) through a second pipeline, and a second stop valve (16) is arranged between the first pipeline and the second pipeline;
the pressure sensor (11) is used for acquiring a pressure value at an inlet of the main valve body (1) and transmitting the pressure value to the controller (12), and the controller (12) controls the proportional pilot valve (13) to realize reversing according to the pressure value;
the angle sensor (17) is used for measuring the rotation angle of the special-shaped external thread plug (3) and transmitting the rotation angle signal to the controller (12), the controller (12) judges whether the pressure relief requirement corresponding to the pressure value at the moment can be met according to the rotation angle, if the pressure relief requirement cannot be met, the controller (12) can control the proportional pilot valve (13) to increase the working port through flow and increase the lifting height of the special-shaped external thread plug (3).
2. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by the vane motor as claimed in claim 1, wherein: the vane motor (7) comprises an upper cavity (79), a lower cavity (73) and a base (71) which are connected in sequence; the upper cavity (79) and the lower cavity (73) are respectively provided with a first oil port and a second oil port, and the first oil port and the second oil port are symmetrically arranged relative to the axis of the vane motor (7);
the oil distribution plate is characterized in that the lower cavity (73) and the upper cavity (79) form an accommodating cavity, an upper oil distribution plate (78), a stator ring (75) and a lower oil distribution plate (74) are sequentially arranged in the accommodating cavity, a rotor (76) is arranged inside the stator ring (75), and a plurality of blades (77) are uniformly distributed on the outer wall of the rotor (76).
3. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by the vane motor as claimed in claim 2, wherein: the rotor (76) is sleeved on the outer wall of the special-shaped external thread plug (3) and is connected with the special-shaped external thread plug (3) through a spline.
4. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by a vane motor as claimed in claim 3, wherein: the valve cover comprises a sealing end cover (6) and a supporting cylinder (2), threads are formed in two ends of the supporting cylinder (2), one end of the supporting cylinder (2) is connected with the special-shaped external thread plug (3) through an internal thread, and the other end of the supporting cylinder is connected with the sealing end cover (6) through an external thread.
5. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by the vane motor as claimed in claim 4, wherein: a first sealing ring (4) is arranged between the outer wall of the special-shaped external thread plug (3) and the inner wall of the supporting cylinder (2); the supporting cylinder (2) is connected with the main valve body (1) through threads, and a second sealing ring (5) is installed at the meshing position of the supporting cylinder (2) and the internal threads of the main valve body (1).
6. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by the vane motor as claimed in claim 5, wherein: the hand wheel (8) is connected with the special-shaped external thread plug (3) through a nut (10) and a gasket (9).
7. The multi-redundancy proportional pilot-operated safety water hammer relief valve directly driven by the vane motor as claimed in claim 6, wherein: the lower oil distribution disc (74) is sealed by a sealing ring at the contact part with the lower cavity body (73).
8. The safety type water hammer relief valve with multiple redundancy proportions and pilot operated type directly driven by the vane motor as claimed in claim 7 is characterized in that: the upper cavity (79) is sealed by a sealing ring at the contact part of the upper cavity and the lower cavity (73).
CN202110173374.3A 2021-02-09 2021-02-09 Multi-redundancy-proportion pilot-operated safety water hammer relief valve directly driven by vane motor Active CN112879627B (en)

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CN203421240U (en) * 2013-07-18 2014-02-05 中国航天科技集团公司第六研究院第十一研究所 Y type pilot-operated type water-attack pressure release valve system
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