CN112032365A - Check valve with controllable opening and closing, water delivery and water transfer unit and control method - Google Patents
Check valve with controllable opening and closing, water delivery and water transfer unit and control method Download PDFInfo
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- CN112032365A CN112032365A CN202010992369.0A CN202010992369A CN112032365A CN 112032365 A CN112032365 A CN 112032365A CN 202010992369 A CN202010992369 A CN 202010992369A CN 112032365 A CN112032365 A CN 112032365A
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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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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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
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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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
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a check valve with controllable opening and closing, a water delivery and transfer unit and a control method, wherein the check valve comprises a valve body, a valve cavity is formed in the valve body, a valve core supporting part is arranged in the middle of the valve cavity and divides the valve cavity into an upper valve cavity and a lower valve cavity, a through hole is formed in the middle of the valve core supporting part and communicates the upper valve cavity and the lower valve cavity, a central shaft is sleeved in the through hole and can freely slide in the through hole, one end, inserted into the upper valve cavity, of the central shaft is detachably connected with a diaphragm, and the diaphragm divides the upper valve cavity into a first valve cavity and a second valve cavity; one end of the central shaft inserted into the lower valve cavity is detachably connected with a valve core, and the valve core is used for opening or closing the check valve. The check valve of the unit is reasonably designed, the opening and closing speed and time of the check valve are effectively controlled, and the safe and stable operation of the water delivery and transfer system is ensured.
Description
Technical Field
The invention relates to the field of liquid transportation, in particular to a check valve with controllable opening and closing, a water delivery and transfer unit and a control method.
Background
With the development of urban construction and the increasing living standard, and natural drought, the water demand is continuously and sharply increased. Meanwhile, the water resources of water taking places such as lakes and the like are increasingly exhausted due to the continuous decline of the underground water level of a water source near cities caused by production, life, social activities and the like of human beings. In order to ensure sustainable development of social economy, protection of ecological water resources is urgent, and water transfer by using pump station pipelines and lake water and the like are enabled to flow and reasonably be used, so that an effective method for treating water pollution and protecting the ecological water resources is provided. Therefore, pipelines with long distance, high lift, large flow and complex terrains are adopted to deliver and transfer water more and more.
At present, with the development of science and technology and industry, the technology of transferring and conveying water resources can realize the conveying of long distance, complex terrain and high lift. In a long-distance large-scale water conveying and transferring system with complex terrains, check valves are arranged at the water pump outlet of the unit more and more. Different water delivery and transfer projects have higher requirements on the selection and control of the check valve, and the safety of the whole water delivery and transfer system is influenced.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the diaphragm type check valve can effectively prevent media from flowing backwards, the sealing effect is good, the opening and closing speed and time can be effectively adjusted and controlled, water hammer is effectively avoided, and the safe, stable and efficient operation of a water delivery and delivery system is ensured.
The technical scheme adopted by the invention is as follows:
a check valve with controllable opening and closing comprises a valve body, wherein a valve cavity is formed in the valve body, a valve core supporting part is arranged in the middle of the valve cavity and divides the valve cavity into an upper valve cavity and a lower valve cavity, a through hole is formed in the middle of the valve core supporting part and communicates the upper valve cavity and the lower valve cavity, a central shaft is sleeved in the through hole and can freely slide in the through hole, one end, inserted into the upper valve cavity, of the central shaft is detachably connected with a diaphragm, and the diaphragm divides the upper valve cavity into a first valve chamber and a second valve chamber; one end of the central shaft inserted into the lower valve cavity is detachably connected with a valve core, and the valve core is used for opening or closing the check valve.
Further, the invention discloses a preferable structure of the check valve with controllable opening and closing, wherein the diaphragm moves synchronously with the central shaft to isolate or communicate the first valve chamber and the second valve chamber.
Furthermore, valve seats are arranged on the inner walls of the upper valve cavity and the lower valve cavity of the valve body, the valve seats are matched with the valve cores, when the valve cores are connected with the valve seats, the check valves are closed, and when the valve cores are not connected with the valve seats, the check valves are opened;
further, the valve body includes a valve inlet communicating to the first valve chamber through a conduit and a valve outlet communicating to the second valve chamber through a conduit.
Further, a spring is arranged between the valve core supporting part and the valve core in the valve cavity and is in a compression state, when the check valve is not used, the valve core is pressed on the valve seat by the spring, and the check valve is in a normally closed state.
Furthermore, a second manual ball valve and a second flow regulating valve are arranged on a pipeline connecting the valve inlet and the first valve chamber, the second manual ball valve is used for opening and closing the communicating pipeline, and the second flow regulating valve is used for regulating the flow rate of the pipeline.
Furthermore, a first flow adjusting valve and a first manual ball valve are arranged on a pipeline of the valve outlet and the second valve chamber, the first manual ball valve is used for opening and closing the communicating pipeline, and the first flow adjusting valve is used for adjusting the flow rate of the pipeline.
The utility model provides a defeated unit of transferring water based on check valve, includes the intake chamber, the intake chamber is connected with the inlet tube, the water piping connection has the import valve to have the main pump through the pipe connection, the input of main pump is linked together through pipeline and import valve, the defeated department end of main pump has diaphragm formula check valve through the pipe connection, diaphragm formula check valve has the outlet valve through the pipe connection, the outlet valve is through going out water piping connection to the pond.
Furthermore, the invention discloses a water delivery and adjustment unit based on a check valve, wherein a first expansion joint is connected between the water outlet end of an inlet valve and the water inlet end of a main pump, and a second expansion joint is connected between the water outlet end of the main pump and the water inlet end of a diaphragm type check valve; the main pump is connected with a motor in a rotating power mode.
A control method based on a water delivery and transfer unit comprises the following steps:
1. preparation before starting: before the main pump is started, the water inlet tank must be filled with water or the uninterrupted water supply is ensured; fully opening the inlet valve; the main pump is finished and normal by turning; fully opening a first flow regulating valve, a first manual ball valve, a second manual ball valve and a second flow regulating valve; checking whether each power supply is normal; checking the preparation completion and normal running state of each auxiliary device;
2. the unit operates, a main pump is started, water passes through a water inlet pipe, an inlet valve and a first expansion joint from a water inlet tank and then reaches the main pump, and the water is pressurized by the main pump and then reaches a diaphragm type check valve through a second expansion joint; the water enters from the valve inlet and then flows in two paths, one path of the water passes through the second flow guide pipe and then reaches the first valve chamber, the diaphragm is opened by the water, and part of the water passes through the first flow guide pipe, passes through the first flow regulating valve and the first manual ball valve and reaches the 22-valve outlet; the other path opens the valve core through water, and finally the water flows through the valve outlet to reach the front end of the outlet valve. According to the medium flowing direction, when the pressure in front of the outlet valve is larger than that behind the outlet valve, the outlet valve is opened, water reaches a water outlet pool after passing through the water outlet pipe, and the unit is started successfully and operates normally;
3. when the unit stops, the outlet valve is closed firstly, and the main pump is stopped immediately after the outlet valve is completely closed;
4. when the main pump stops, water flows reversely through the height difference and flows in two paths, one path of water flows in through the valve outlet, the other path of water flows in from the first flow guide pipe, reaches the second valve chamber after passing through the first manual ball valve and the first flow adjusting valve, and pushes and presses the diaphragm and the valve core simultaneously to enable the valve core to be closed, so that a medium is blocked to flow back to the main pump, the main pump is effectively prevented from reversing, and the unit stops finishing.
5. When the diaphragm type check valve is put into use, when the diaphragm type check valve is opened, the flow is adjusted and controlled through a second flow adjusting valve arranged on a second flow guide pipe, so that the opening time of a control valve core is promoted, the flow of the second flow adjusting valve is adjusted according to the actual working conditions and requirements of various water delivery and adjustment projects, and the optimal operation state is finally achieved;
6. when the diaphragm type check valve is put into use, when the diaphragm type check valve is closed, the first flow regulating valve arranged on the first flow guide pipe is used for regulating the flow rate to control the closing time of the diaphragm and the valve core, and the flow rate of the first flow regulating valve is regulated according to the actual working conditions and requirements of various water delivery and regulation projects to finally reach the optimal operation state.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the check valve of the unit is reasonably designed, the opening and closing speed and time of the check valve are effectively controlled, and the safe and stable operation of a water delivery and transfer system is ensured;
2. the technical problem that the water hammer of the pump set is eliminated in the shutdown process is effectively solved, and the effective protection of pipelines and pump set equipment is realized;
3. the pipe explosion and equipment damage accidents of the pipelines of the water delivery and transfer system are effectively prevented, and the safety of a pipe network system is effectively ensured;
4. the stability of pipeline water delivery and transfer system and the work efficiency of pipeline transport have been improved, the life of extension pipeline has improved the economic benefits of water delivery and transfer.
Drawings
FIG. 1 is a schematic view of the piping system of the present invention;
FIG. 2 is a schematic view of the check valve of the present invention;
the labels in the figure are: the water inlet device comprises a water inlet tank 1, a water inlet pipe 2, an inlet valve 3, a first telescopic joint 4, a motor 5, a main pump 6, a second telescopic joint 7, a diaphragm type check valve 8, an outlet valve 9, a water outlet pipe 10, a water outlet tank 11, a valve core 12, a spring 13, a first valve chamber 14, a diaphragm 15, a central shaft 16, a valve cover 17, a valve cover 18, a second valve chamber 19, a first flow regulating valve 19, a first manual ball valve 20, a first flow guide pipe 21, a valve outlet 22, a valve inlet 23, a valve seat 24, a second flow guide pipe 25, a second manual ball valve 26 and a second manual flow regulating valve 27.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
as shown in fig. 1, the present invention discloses a preferred embodiment of a check valve with controllable opening and closing, which includes a valve body, a valve cavity is formed in the valve body, a valve core support part is arranged in the middle of the valve cavity, the valve core support part divides the valve cavity into an upper valve cavity and a lower valve cavity, a through hole is formed in the middle of the valve core support part, the through hole is communicated with the upper valve cavity and the lower valve cavity, a central shaft 16 is sleeved in the through hole, the central shaft 16 can freely slide in the through hole, one end of the central shaft 16 inserted into the upper valve cavity is detachably connected with a diaphragm 15, and the diaphragm 15 divides the upper valve cavity into a first valve cavity 14 and a second; the diaphragm 15 moves in synchronization with the central shaft 16 to isolate or communicate the first valve chamber 14 and the second valve chamber 18. One end of the central shaft 16 inserted into the lower valve cavity is detachably connected with a valve core 12, and the valve core 12 is used for opening or closing the check valve.
The inner walls of the upper valve cavity and the lower valve cavity of the valve body are provided with valve seats 24, a spring 13 is arranged between the valve core supporting part and the valve core 12 in the valve cavity, the spring 13 is in a compressed state, when the check valve is not used, the spring 13 presses the valve core 12 on the valve seats 24, and the check valve is in a normally closed state. The valve seat 24 and the valve core 12 are matched with each other, when the valve core 12 is connected with the valve seat 24, the check valve is closed, and when the valve core 12 is not connected with the valve seat 24, the check valve is opened; the valve body includes a valve inlet 23 and a valve outlet 22, the valve inlet 23 being connected to the first valve chamber 14 by a conduit and the valve outlet 22 being connected to the second valve chamber 18 by a conduit.
A second manual ball valve 26 and a second flow regulating valve 27 are arranged on a pipeline of the valve inlet 23 connected with the first valve chamber 14, the second manual ball valve 26 is used for opening and closing a communication pipeline, and the second flow regulating valve 27 is used for regulating the flow rate of the pipeline. A first flow regulating valve 19 and a first manual ball valve 20 are arranged on a pipeline connecting the valve outlet 22 and the second valve chamber 18, the first manual ball valve 20 is used for opening and closing a communication pipeline, and the first flow regulating valve 19 is used for regulating the flow rate of the pipeline.
When the valve is used specifically, the second manual ball valve 26, the second flow regulating valve 27, the first flow regulating valve 19 and the first manual ball valve 20 are opened, liquid enters the second manual ball valve 26 and the second flow regulating valve 27 from the valve inlet 23 and finally enters the first valve chamber 14, the diaphragm 15 is pushed to move under the action of water pressure, the diaphragm 15 drives the central shaft 16 to move, the valve core 12 is finally driven to move, the check valve is opened, and the liquid normally flows through the check valve.
When the pressure of the liquid is reversed, the liquid enters the first flow regulating valve 19 and the first manual ball valve 20 from the valve outlet 22 and then enters the second valve chamber 18, the second valve chamber 18 pushes the diaphragm 15 to move, the diaphragm 15 drives the central shaft 16 and the valve core 12 to return to the original position, and the check valve is closed to prevent the liquid from flowing back. The check valve of the unit is reasonably designed, the opening and closing speed and time of the check valve are effectively controlled, and the safe and stable operation of the water delivery and transfer system is ensured.
Example 2:
as shown in fig. 2, the invention discloses a preferable structure of a water delivery and adjustment unit based on a check valve, which comprises a water inlet tank 1, wherein the water inlet tank 1 is connected with a water inlet pipe 2, the water inlet pipe 2 is connected with an inlet valve 3 and is connected with a main pump 6 through a pipeline, the input end of the main pump 6 is communicated with the inlet valve 3 through a pipeline, the delivery end of the main pump 6 is connected with a diaphragm type check valve 8 through a pipeline, the diaphragm type check valve 8 is connected with an outlet valve 9 through a pipeline, and the outlet valve 9 is connected to a water outlet tank 11 through a water outlet pipe 10.
A first expansion joint 4 is connected between the water outlet end of the inlet valve 3 and the water inlet end of a main pump 6, and a second expansion joint 7 is connected between the water outlet end of the main pump 6 and the water inlet end of a diaphragm type check valve 8; the main pump 6 is connected with a motor 5 in a rotating power mode.
When the water inlet tank works, the inlet valve 3, the second manual ball valve 26, the second flow regulating valve 27, the first flow regulating valve 19 and the first manual ball valve 20 are opened, the motor 5 is started, the motor 5 drives the main pump 6 to work, and water enters the water outlet tank 11 from the water inlet tank 1 through the water inlet pipe 2, the inlet valve 3, the first telescopic joint 4, the main pump 6, the second telescopic joint 7, the diaphragm type check valve 8, the outlet valve 9 and the water outlet pipe 10. When the machine is stopped, the diaphragm type check valve 8 can cut off the whole pipeline, and the whole pipeline is prevented from being damaged by backwater impact. The technical problem that the water hammer of the pump set is eliminated in the shutdown process is effectively solved, and the effective protection of pipelines and pump set equipment is realized; the pipe explosion and equipment damage accidents of the pipeline of the water delivery and transfer system are effectively prevented, and the safety of a pipe network system is effectively ensured.
Example 3:
a control method based on a water delivery and transfer unit comprises the following steps:
1. preparation before starting: before the main pump 6 is started, the water inlet tank 1 must be filled with water or the uninterrupted water supply is ensured; fully opening the inlet valve 3; the main pump 6 is finished and normal by turning; fully opening the first flow regulating valve 19, the first manual ball valve 20, the second manual ball valve 26 and the second flow regulating valve 27; checking whether each power supply is normal; checking the preparation completion and normal running state of each auxiliary device;
2. the unit operates, a main pump 6 is started, water passes through a water inlet pipe 2, an inlet valve 3 and a first expansion joint 4 from a water inlet tank 1 and then reaches the main pump 6, and the water is pressurized by the main pump 6 and then reaches a diaphragm type check valve 8 through a second expansion joint 7; the water enters from the valve inlet 23 and then flows in two paths, one path of the water passes through the second flow guide pipe 25 and then reaches the first valve chamber 14, the diaphragm 15 is opened through the water, and part of the water passes through the first flow guide pipe 21, the first flow regulating valve 19 and the first manual ball valve 20 and then reaches the valve outlet 22; the other path opens the valve core 12 by water, and finally the water flows through the valve outlet 22 to the front end of the outlet valve 9. According to the medium flowing direction, when the pressure in front of the outlet valve 9 is larger than that behind the outlet valve 9, the outlet valve 9 is opened, water reaches the water outlet pool 11 after passing through the water outlet pipe 10, and the unit is started successfully and operates normally;
3. the unit stops, the outlet valve 9 is closed firstly, and the main pump 6 is stopped immediately after the outlet valve 9 is completely closed;
4. when the main pump 6 stops, water flows reversely through the height difference and flows in two paths, one path of water flows in through the valve outlet 22, the other path of water flows in from the first flow guide pipe 21, reaches the second valve chamber 18 after passing through the first manual ball valve 20 and the first flow regulating valve 19, and pushes and presses the diaphragm 15 and the valve core 12 at the same time to close the valve core 12, so that the medium is blocked from flowing backwards to the main pump 6, the main pump 6 is effectively prevented from reversing, and the machine set stops;
5. when the diaphragm type check valve 8 is put into use, when the diaphragm type check valve 8 is opened, the flow control is adjusted through the second flow adjusting valve 27 arranged on the second flow guide pipe 25, so that the opening time of the control valve core 12 is promoted, the flow of the second flow adjusting valve 27 is adjusted according to the actual working conditions and requirements of various water delivery and adjustment projects, and the optimal operation state is finally achieved;
6. when the diaphragm type check valve 8 is put into use, when the diaphragm type check valve 8 is closed, the first flow regulating valve 19 arranged on the first flow guide pipe 21 is used for regulating the flow rate, so that the closing time of the diaphragm 15 and the valve core 12 is controlled, the flow rate of the first flow regulating valve 19 is regulated according to the actual working conditions and requirements of various water delivery and water transfer projects, and the optimal operation state is finally achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The check valve with controllable opening and closing is characterized in that: the valve comprises a valve body, wherein a valve cavity is formed in the valve body, a valve core supporting part is arranged in the middle of the valve cavity and divides the valve cavity into an upper valve cavity and a lower valve cavity, a through hole is formed in the middle of the valve core supporting part and is communicated with the upper valve cavity and the lower valve cavity, a central shaft (16) is sleeved in the through hole, the central shaft (16) can freely slide in the through hole, one end, inserted into the upper valve cavity, of the central shaft (16) is detachably connected with a diaphragm (15), and the diaphragm (15) divides the upper valve cavity into a first valve chamber (14) and a second valve chamber (18); one end of the central shaft (16) inserted into the lower valve cavity is detachably connected with a valve core (12), and the valve core (12) is used for opening or closing the check valve.
2. The check valve with controllable opening and closing of claim 1, wherein: the diaphragm (15) moves synchronously with the central shaft (16) to isolate or communicate the first valve chamber (14) and the second valve chamber (18).
3. The check valve with controllable opening and closing of claim 2, wherein: the inner walls of the upper valve cavity and the lower valve cavity of the valve body are provided with valve seats (24), the valve seats (24) are matched with the valve cores (12), when the valve cores (12) are connected with the valve seats (24), the check valves are closed, and when the valve cores (12) are not connected with the valve seats (24), the check valves are opened.
4. A check valve with controllable opening and closing as claimed in claim 3, wherein: the valve body comprises a valve inlet (23) and a valve outlet (22), the valve inlet (23) being connected to the first valve chamber (14) by a conduit, the valve outlet (22) being connected to the second valve chamber (18) by a conduit.
5. The check valve with controllable opening and closing of claim 4, wherein: and a spring (13) is arranged between the valve core supporting part and the valve core (12) in the valve cavity, the spring (13) is in a compressed state, when the check valve is not used, the spring (13) presses the valve core (12) on the valve seat (24), and the check valve is in a normally closed state.
6. The check valve with controllable opening and closing of claim 5, wherein: and a second manual ball valve (26) and a second flow regulating valve (27) are arranged on a pipeline of the valve inlet (23) connected with the first valve chamber (14), the second manual ball valve (26) is used for opening and closing a communicated pipeline, and the second flow regulating valve (27) is used for regulating the flow rate of the pipeline.
7. The check valve with controllable opening and closing of claim 6, wherein: and a first flow regulating valve (19) and a first manual ball valve (20) are arranged on a pipeline connecting the valve outlet (22) and the second valve chamber (18), the first manual ball valve (20) is used for opening and closing a communicated pipeline, and the first flow regulating valve (19) is used for regulating the flow rate of the pipeline.
8. A water delivery and transfer unit based on the check valve of any one of claims 1-7, characterized in that: including intake pool (1), intake pool (1) is connected with inlet tube (2), inlet tube (2) are connected with inlet valve (3) and have main pump (6) through pipe connection, the input of main pump (6) is linked together through pipeline and inlet valve (3), there are diaphragm formula check valve (8) in the defeated department end of main pump (6) through pipe connection, diaphragm formula check valve (8) have outlet valve (9) through pipe connection, outlet valve (9) are connected to outlet pool (11) through outlet pipe (10).
9. The water delivery and transfer unit based on the check valve as claimed in claim 8, wherein: a first expansion joint (4) is connected between the water outlet end of the inlet valve (3) and the water inlet end of the main pump (6), and a second expansion joint (7) is connected between the water outlet end of the main pump (6) and the water inlet end of the diaphragm type check valve (8); the main pump (6) is connected with a motor (5) in a rotating power mode.
10. The control method of the water delivery and conditioning unit based on claim 9 is characterized by comprising the following steps:
1. preparation before starting: before the main pump (6) is started, the water inlet tank (1) must be filled with water or the uninterrupted water supply is ensured; fully opening the inlet valve (3); the main pump (6) is turned over and normal; fully opening a first flow regulating valve (19), a first manual ball valve (20), a second manual ball valve (26) and a second flow regulating valve (27); checking whether each power supply is normal; checking the preparation completion and normal running state of each auxiliary device;
2. the unit operates, a main pump (6) is started, water passes through a water inlet pipe (2), an inlet valve (3) and a first expansion joint (4) from a water inlet tank (1) and then reaches the main pump (6), and water is pressurized by the main pump (6) and then reaches a diaphragm type check valve (8) through a second expansion joint (7); water enters from a valve inlet (23) and then flows in two paths, one path of water reaches a first valve chamber (14) after passing through a second flow guide pipe (25), a diaphragm (15) is opened by the water, and part of the water passes through a first flow guide pipe (21), passes through a first flow regulating valve (19) and a first manual ball valve (20) and reaches a valve outlet (22); the other path opens the valve core (12) through water, and finally the water flows through the valve outlet (22) to reach the front end of the outlet valve (9). According to the medium flowing direction, when the pressure in front of the outlet valve (9) is larger than that behind the outlet valve (9), the outlet valve (9) is opened, water reaches a water outlet pool (11) after passing through a water outlet pipe (10), and the unit is started successfully and operates normally;
3. the unit stops, the outlet valve (9) is closed firstly, and the main pump (6) is stopped immediately after the outlet valve (9) is completely closed;
4. when the main pump (6) stops, water flows reversely through a height difference and flows in two paths, one path of water flows in through a valve outlet (22), the other path of water flows in from a first flow guide pipe (21), reaches a second valve chamber (18) after passing through a first manual ball valve (20) and a first flow regulating valve (19), and pushes and presses a diaphragm (15) and a valve core (12) at the same time to close the valve core (12) and block a medium from flowing backwards to the main pump (6), so that the main pump (6) is effectively prevented from reversing, and the machine set stops;
5. when the diaphragm type check valve (8) is put into use, when the diaphragm type check valve (8) is opened, the second flow regulating valve (27) arranged on the second flow guide pipe (25) is used for regulating the control flow, so that the opening time of the control valve core (12) is promoted, the flow of the second flow regulating valve (27) is regulated according to the actual working conditions and requirements of various water delivery and regulation projects, and the optimal operation state is finally reached;
6. when the diaphragm type check valve (8) is put into use, when the diaphragm type check valve (8) is closed, the first flow regulating valve (19) arranged on the first flow guide pipe (21) is used for regulating the control flow, so that the closing time of the diaphragm (15) and the valve core (12) is controlled, the flow of the first flow regulating valve (19) is regulated according to the actual working conditions and requirements of various water conveying and regulating projects, and the optimal operation state is finally achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010992369.0A CN112032365A (en) | 2020-09-21 | 2020-09-21 | Check valve with controllable opening and closing, water delivery and water transfer unit and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010992369.0A CN112032365A (en) | 2020-09-21 | 2020-09-21 | Check valve with controllable opening and closing, water delivery and water transfer unit and control method |
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| CN112032365A true CN112032365A (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217643A (en) * | 2021-06-02 | 2021-08-06 | 中国长江三峡集团有限公司 | Differential pressure type pipe explosion safety valve and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113217643A (en) * | 2021-06-02 | 2021-08-06 | 中国长江三峡集团有限公司 | Differential pressure type pipe explosion safety valve and method |
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