CN112879625A - Multi-redundancy-proportion pilot-operated type axial-flow safety water hammer relief valve directly driven by gear motor - Google Patents
Multi-redundancy-proportion pilot-operated type axial-flow safety water hammer relief valve directly driven by gear motor Download PDFInfo
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- CN112879625A CN112879625A CN202110173367.3A CN202110173367A CN112879625A CN 112879625 A CN112879625 A CN 112879625A CN 202110173367 A CN202110173367 A CN 202110173367A CN 112879625 A CN112879625 A CN 112879625A
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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
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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
- F16K17/164—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
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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
- F16K17/168—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
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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
- F16K31/36—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
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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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
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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
- 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
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the technical field of pressure relief valves, in particular to a multi-redundancy-ratio pilot-operated type axial-flow safety type water hammer pressure relief valve directly driven by a gear motor, which comprises a controller and a special-shaped external thread plug, wherein one end of the special-shaped external thread plug sequentially penetrates through the gear motor and a valve cover from top to bottom, extends into a 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 gear motor is used for driving the special-shaped external thread plug; an electromagnetic pilot proportional reversing valve, a mechanical pilot valve, a first stop valve and a second stop valve are arranged between the main valve body and the gear motor; the controller controls the electromagnetic pilot proportional reversing valve to realize reversing according to the pressure value; the electromagnetic pilot proportional directional 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-proportion pilot-operated type axial-flow safety type water hammer relief valve directly driven by a gear motor, which solves the problem that the conventional relief valve cannot adaptively regulate the relief flow.
Description
Technical Field
The invention relates to the technical field of water hammer relief valves, in particular to a multi-redundancy-proportion pilot-operated type axial flow safety water hammer relief valve directly driven by a gear 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 aim of protecting the pipeline and equipment in the pipeline is fulfilled. 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, the liquid is limited by the pilot valve structure and the diameter of the pressure guiding pipe, the liquid discharging speed in the main valve cavity is low, and the main valve cannot be opened rapidly.
2. Oil liquid needs to flow through the main valve cavity, so the requirement on a liquid medium is high, and a filter needs to be installed, so that the traditional water hammer pressure release valve can only be used for a finished oil long delivery pipeline, and the application scene of the traditional water hammer pressure release valve 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 aggravated, and the service life is short.
4. Because the opening and closing degree of the valve core of the main valve is not adjustable, the valve core of the main valve can only be in an opening state or a closing state, the valve core of the main valve needs to be opened and closed frequently under certain conditions, and the service life of the main valve is shortened.
Disclosure of Invention
The invention provides a multi-redundancy-proportion pilot-operated type axial-flow safety type water hammer relief valve directly driven by a gear motor, and aims to solve the problem that the conventional relief valve cannot adaptively adjust the relief flow.
The technical scheme for solving the problems is as follows: a multi-redundancy proportional pilot-operated type axial-flow safety water hammer relief valve directly driven by a gear motor comprises a hand wheel, the gear motor, a valve cover, a mechanical pilot valve, an electromagnetic pilot-operated proportional reversing valve, a pressure sensor, an angular displacement sensor 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 a gear motor and a 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 gear 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;
the oil inlets of the electromagnetic pilot proportional reversing valve and the mechanical pilot valve are connected in series and then connected with the oil inlet of the main valve body through a first stop valve, and the oil outlets of the electromagnetic pilot proportional reversing valve and the mechanical pilot valve are connected to the oil outlet of the main valve body; an oil inlet of the gear motor is connected to one working port of the electromagnetic pilot proportional reversing valve and the mechanical pilot valve through a first pipeline, a second oil port of the gear motor is connected to the other working port of the electromagnetic pilot proportional reversing 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 electromagnetic pilot proportional reversing 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 electromagnetic pilot proportional directional 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 gear motor includes a housing and first and second gears disposed within the housing; the first gear is meshed with the second gear, the first gear is located on the outer side of the second gear, an oil inlet and an oil outlet are formed in the shell, the oil inlet and the oil outlet are symmetrically arranged relative to the axis of the gear motor, and the oil inlet and the oil outlet are located on two sides of a connecting line of the center of the first gear and the center of the second gear respectively.
Preferably, the first gear is provided with an internal spline, the special-shaped external thread plug is provided with an external spline, and the second end of the special-shaped external thread plug penetrates through the internal spline and then is connected with the hand wheel.
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; and a second sealing ring is arranged at the meshing position of the supporting cylinder and the internal thread 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.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention can realize the purpose of automatic pressure relief by the action of a proportional solenoid valve or a mechanical pilot valve, the pressure relief flow can be adaptively adjusted according to the pipeline pressure and the opening degree of a main valve, and when a valve body fails, the normal work of the pressure relief valve can be ensured by a manual operation mode.
2) The electromagnetic pilot proportional reversing valve is adopted, the reversing speed is high, the main valve acts rapidly, and pressure can be relieved in time. The redundant mechanical pilot valve is arranged, and when the electromagnetic pilot proportional directional valve fails, the normal work of the water hammer relief valve can still be guaranteed.
3) The manual operation device of the water hammer relief valve is arranged, and when the electromagnetic pilot proportional directional valve and the mechanical pilot valve are invalid, the water hammer relief valve can still be guaranteed to normally work in a manual operation mode.
4) The system has no spring, so that the valve core cannot vibrate during working, and the service life of the valve core is prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a gear motor structure.
FIG. 3 is a schematic diagram of the opening of the main valve spool according to the present invention.
In the figure: 1. the main valve body, 2, a support cylinder, 3, a second seal ring, 4, a special-shaped external thread plug, 5, a first seal ring, 6, a seal end cover, 7, a hand wheel, 8, a gear motor, 81, a first gear, 82, a second gear, 83, an oil inlet, 84, an oil outlet, 85, a shell, 9, an angular displacement sensor, 10, a pressure sensor, 11, a controller, 12, an electromagnetic pilot proportional reversing valve, 13, a mechanical pilot valve, 14, a first stop valve, 15 and a second stop valve.
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 any inventive step based on the embodiments of the present invention, are within the 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-proportion pilot-operated type axial-flow safety water hammer relief valve directly driven by a gear motor comprises a hand wheel 7, a gear motor 8, a valve cover, a mechanical pilot valve 13, an electromagnetic pilot-operated proportional directional valve 12, a pressure sensor 10, an angular displacement sensor 9 and a main valve body 1.
The bottom of the hand wheel 7 is provided with a special-shaped external thread plug 4, one end of the special-shaped external thread plug 4 sequentially penetrates through the gear motor 8 and the 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 4 is rotatably connected with the valve cover, and the gear motor 8 is used for driving the special-shaped external thread plug 4 to rotate;
the included angle between the special-shaped external thread plug 4 and the axis of the oil inlet of the main valve body 1 is 90 degrees;
the oil inlets of the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 are connected in series and then connected with the oil inlet of the main valve body 1 through a first stop valve 14, and the oil outlets of the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 are connected with the oil outlet of the main valve body 1; an oil inlet 83 of the gear motor 8 is connected to one working port of the electromagnetic pilot proportional directional valve 12 and one working port of the mechanical pilot valve 13 through a first pipeline, a second oil port of the gear motor 8 is connected to the other working port of the electromagnetic pilot proportional directional valve 12 and the other working port of the mechanical pilot valve 13 through a second pipeline, and a second stop valve 15 is arranged between the first pipeline and the second pipeline;
the pressure sensor 10 is used for acquiring a pressure value at an inlet of the main valve body 1 and transmitting the pressure value to the controller 11, and the controller 11 controls the electromagnetic pilot proportional directional valve 12 to realize the direction change according to the pressure value;
the angle sensor 9 is used for measuring the rotation angle of the special-shaped external thread plug 4, and transmits the rotation angle signal to the controller 11, the controller 11 judges whether the pressure relief requirement corresponding to the pressure value at the moment can be met according to the rotation angle, if not, the controller 11 can control the electromagnetic pilot proportional directional valve 12 to increase the working opening through flow and increase the lifting height of the special-shaped external thread plug 4.
As a preferred embodiment of the present invention: the gear motor 8 includes a housing 85 and a first gear 81 and a second gear 82 provided in the housing 85; the first gear 81 is engaged with the second gear 82, the first gear 81 is located outside the second gear 82, an oil inlet 83 and an oil outlet 84 are arranged on the housing 85, the oil inlet 83 and the oil outlet 84 are symmetrically arranged relative to the axis of the gear motor 8, and the oil inlet 83 and the oil outlet 84 are respectively located on two sides of a connecting line of the center of the first gear 81 and the center of the second gear 82.
As a preferred embodiment of the present invention: an internal spline is arranged on the first gear 81, an external spline is arranged on the special-shaped external thread plug 4, and the second end of the special-shaped external thread plug 4 penetrates through the internal spline and then is connected with the hand wheel 7.
As a preferred embodiment of the present invention: the valve gap includes end cover 6 and a support section of thick bamboo 2, and the both ends of a support section of thick bamboo 2 are all seted up threadedly, and the one end of a support section of thick bamboo 2 is passed through the internal thread and is connected with special-shaped external screw thread end cap 4, and the other end passes through the external screw thread and is connected with end cover 6.
As a preferred embodiment of the present invention: a first sealing ring 5 is arranged between the outer wall of the special-shaped external thread plug 4 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 3 is arranged at the meshing position of the supporting cylinder 2 and the internal threads of the main valve body 1.
As a preferred embodiment of the present invention: the hand wheel 7 is connected with the special-shaped external thread plug 4 through a nut, and a gasket is arranged between the nut and the hand wheel 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 path has no water hammer, the pressure detected by the pressure sensor 10 is smaller than the oil pressure threshold, the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 are in the left position, and the main valve body 1 is in the closed state.
When water hammer occurs in the main oil path, the inlet pressure of the main valve body 1 is greater than the oil pressure threshold, the mechanical pilot valve 15 is in the right position, meanwhile, the oil pressure detected by the pressure sensor 10 is greater than the oil pressure threshold, and the controller 11 controls the working state of the electromagnetic pilot proportional directional valve 12 to be in the right position. The oil liquid flows into the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 from the main valve body 1 through the first stop valve 14, enters the oil outlet 84 of the gear motor 8 when flowing out of the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13, passes through the oil inlet 83 of the gear motor 8, and then flows back to the outlet oil path of the main valve body 1 through the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13. When hydraulic oil passes through the gear motor 8 and the gear motor 8, the first gear 81 is pushed to rotate anticlockwise, so that the special-shaped external thread plug 4 is displaced upwards in the supporting cylinder 2, the inlet of the main valve body 1 is communicated with the outlet, and the oil flows from the inlet to the outlet, so that the oil pressure in the pipeline is reduced. Simultaneously angle sensor 9 detects the angle that special-shaped external screw thread end cap 4 actually rotated, pass the signal to controller 11, controller 11 judges whether the angle that special-shaped external screw thread end cap 4 actually rotated satisfies the turned angle requirement when this pressure, if the angle undersize that actually rotates, controller 11 can control 12 increase work flows of electromagnetism guide proportion switching-over valve, increase 4 turned angle of special-shaped external screw thread end cap, thereby it is adjustable to realize the valve opening area, make more high-pressure oil get into gear motor 8, and make special-shaped external screw thread end cap 4 rotate bigger angle, improve pressure-relieving capacity.
The electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 are designed in a redundant mode, and when one of the two valves fails, the other valve can ensure that the pressure relief valve works normally.
When gear motor 8 breaks down, can take manual mode, through opening second stop valve 15, make gear motor 8 about the hydraulic fluid port switch on, eliminate the negative pressure, through rotating hand wheel 7, make special-shaped external screw thread end cap 4 anticlockwise rotation, the valve in the main valve body 1 is opened, accomplishes the pressure release.
When the pressure relief is completed, the pressure of the oil path is smaller than the oil pressure threshold value, the mechanical pilot valve 13 is in the left position, meanwhile, the controller 11 receives a signal from the pressure sensor 10 to make the electromagnetic pilot proportional directional valve 12 in the left position, the oil enters the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13 from the inlet of the main valve body 1 through the first stop valve 14, flows out from the electromagnetic pilot proportional directional valve 12 and the mechanical pilot valve 13, enters the oil inlet 83 of the gear motor 8, flows out through the oil outlet 84 of the gear motor 8, and flows back to the outlet of the main valve body 1 through the electromagnetic pilot proportional directional valve 12. When hydraulic oil passes through the gear motor 8, the first gear 81 is pushed to rotate clockwise, so that the special-shaped external thread plug 4 moves downwards in the supporting cylinder 2, a valve in the main valve body 1 is closed, and oil is prevented from flowing out.
If gear motor 8 breaks down and leads to the valve unable to close after the pressure release is accomplished, can be through opening second stop valve 15 to clockwise rotation hand wheel 7 makes special-shaped external screw thread end cap 4 clockwise rotation and descend, closes the valve, stops the pressure release.
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 (6)
1. The utility model provides a many redundancy proportion pilot-operated type axial compressor safety type water hammer relief valve that gear motor directly driven which characterized in that: comprises a hand wheel (7), a gear motor (8), a valve cover, a mechanical pilot valve (13), an electromagnetic pilot proportional directional valve (12), a pressure sensor (10), an angular displacement sensor (9) and a main valve body (1);
the special-shaped external thread plug (4) is arranged at the bottom of the hand wheel (7), one end of the special-shaped external thread plug (4) sequentially penetrates through a gear motor (8) 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 (4) is rotatably connected with the valve cover, and the gear motor (8) is used for driving the special-shaped external thread plug (4) to rotate;
the included angle between the special-shaped external thread plug (4) and the axis of the oil inlet of the main valve body (1) is 90 degrees;
oil inlets of the electromagnetic pilot proportional directional valve (12) and the mechanical pilot valve (13) 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 electromagnetic pilot proportional directional valve (12) and the mechanical pilot valve (13) are connected with an oil outlet of the main valve body (1); an oil inlet (83) of the gear motor (8) is connected to one working port of the electromagnetic pilot proportional directional valve (12) and the mechanical pilot valve (13) through a first pipeline, a second oil port of the gear motor (8) is connected to the other working port of the electromagnetic pilot proportional directional valve (12) and the mechanical pilot valve (13) through a second pipeline, and a second stop valve (15) is arranged between the first pipeline and the second pipeline;
the pressure sensor (10) is used for acquiring a pressure value at an inlet of the main valve body (1) and transmitting the pressure value to the controller (11), and the controller (11) controls the electromagnetic pilot proportional directional valve (12) to realize reversing according to the pressure value;
the angle sensor (9) is used for measuring the rotation angle of the special-shaped external thread plug (4) and transmitting the rotation angle signal to the controller (11), the controller (11) 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 (11) can control the electromagnetic pilot proportional directional valve (12) to increase the working port through flow and increase the lifting height of the special-shaped external thread plug (4).
2. The gear motor direct-driven multi-redundancy proportional pilot-operated type axial-flow safety type water hammer relief valve according to claim 1, is characterized in that: the gear motor (8) comprises a housing (85) and a first gear (81) and a second gear (82) arranged within the housing (85); the first gear (81) is meshed with the second gear (82), the first gear (81) is located on the outer side of the second gear (82), the oil inlet (83) and the oil outlet (84) are arranged on the shell (85), the oil inlet (83) and the oil outlet (84) are symmetrically arranged relative to the axis of the gear motor (8), and the oil inlet (83) and the oil outlet (84) are located on two sides of a connecting line of the center of the first gear (81) and the center of the second gear (82) respectively.
3. The gear motor direct-driven multi-redundancy proportional pilot-operated type axial-flow safety type water hammer relief valve according to claim 2, is characterized in that: an inner spline is arranged on the first gear (81), an outer spline is arranged on the special-shaped external thread plug (4), and the second end of the special-shaped external thread plug (4) penetrates through the inner spline and then is connected with the hand wheel (7).
4. The gear motor direct-driven multi-redundancy proportional pilot-operated type axial-flow safety type water hammer relief valve according to claim 3, is characterized in that: the valve gap includes a seal end cover (6) and a support section of thick bamboo (2), the both ends of a support section of thick bamboo (2) are all seted up threadedly, the one end of a support section of thick bamboo (2) pass through the internal thread with dysmorphism external screw thread end cap (4) are connected, and the other end passes through the external screw thread and is connected with seal end cover (6).
5. The gear motor direct-driven multi-redundancy proportional pilot-operated type axial-flow safety type water hammer relief valve according to claim 4, is characterized in that: a first sealing ring (5) is arranged between the outer wall of the special-shaped external thread plug (4) 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 (3) is installed at the meshing position of the supporting cylinder (2) and the internal threads of the main valve body (1).
6. The gear motor direct-driven multi-redundancy proportional pilot-operated type axial-flow safety type water hammer relief valve according to claim 5, is characterized in that: the hand wheel (7) is connected with the special-shaped external thread plug (4) through a nut, and a gasket is arranged between the nut and the hand wheel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110173367.3A CN112879625B (en) | 2021-02-09 | 2021-02-09 | Multi-redundancy-proportion pilot-operated type axial-flow safety type water hammer relief valve directly driven by gear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110173367.3A CN112879625B (en) | 2021-02-09 | 2021-02-09 | Multi-redundancy-proportion pilot-operated type axial-flow safety type water hammer relief valve directly driven by gear motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112879625A true CN112879625A (en) | 2021-06-01 |
| CN112879625B CN112879625B (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110173367.3A Active CN112879625B (en) | 2021-02-09 | 2021-02-09 | Multi-redundancy-proportion pilot-operated type axial-flow safety type water hammer relief valve directly driven by gear motor |
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| CN114017528A (en) * | 2021-10-09 | 2022-02-08 | 国家石油天然气管网集团有限公司 | Control system and control method for nitrogen type water hammer pressure relief valve |
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| CN112879625B (en) | 2023-01-17 |
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