New butterfly type intelligent pump automatic control valve

Abstract

The present invention provides a new type of butterfly type intelligent pump automatic control valve, characterized in that it includes a valve body, a butterfly plate, a valve stem, and a piston cylinder; the valve body is provided with a water inlet end and a water outlet end, and the piston rod of the piston cylinder is connected to the valve stem and the butterfly plate through a rocker arm; the piston cylinder is provided with an upper chamber inlet of the piston cylinder and a lower chamber inlet of the piston cylinder, and the upper chamber inlet of the piston cylinder and the lower chamber inlet of the piston cylinder are respectively connected to an intelligent control system pilot valve, and two intelligent control system pilot valves are respectively connected to the water inlet end and the water outlet end in opposite directions, and the changes of water inlet and pressure relief of the upper chamber and the lower chamber of the piston cylinder are controlled according to the pressure difference change between the water inlet end and the water outlet end, thereby driving the piston rod to move. The present invention ensures that the water loss is small when the valve is running and achieves energy saving effect; it achieves the effect of both preventing backflow and reducing water hammer pressure; it is light in size, reduces equipment cost, is easy to install, and has good sealing effect; it runs smoothly, is safe, stable and reliable, is wear-resistant, and has a long service life.

Description

Technical Field

[0001] The invention belongs to the field of valves, and in particular relates to a novel butterfly type intelligent pump automatic control valve. Background Art

[0002] A water pump control valve is needed at the outlet of a pressurized water pump in industrial or urban water supply and drainage pipelines or high-rise residential buildings. However, the water pump control valve in the prior art will produce large water losses when the valve is in operation, and it is difficult to eliminate the water pressure impact when the pump is stopped and the water flows backward, which can easily cause destructive water hammer. Summary of the invention

[0003] The present invention provides a novel butterfly type intelligent pump automatic control valve, which has small water loss and can eliminate the generation of destructive water hammer peak value.

[0004] In order to achieve the above object, the technical solution of the present invention is implemented as follows:

[0005] A novel butterfly-type intelligent pump automatic control valve comprises a valve body, a butterfly plate, a valve stem and a piston cylinder; the valve body is provided with a water inlet and a water outlet, and the piston rod of the piston cylinder is connected to the valve stem and the butterfly plate through a rocker arm; the piston cylinder is provided with an upper chamber inlet of the piston cylinder and a lower chamber inlet of the piston cylinder, and the upper chamber inlet of the piston cylinder and the lower chamber inlet of the piston cylinder are respectively connected to an intelligent control system pilot valve, and two intelligent control system pilot valves are respectively connected to the water inlet and the water outlet in opposite directions, and the changes of water inlet and pressure relief of the upper chamber and the lower chamber of the piston cylinder are controlled according to the pressure difference change between the water inlet and the water outlet, that is, when one intelligent control system pilot valve controls the water inlet of the upper chamber or the lower chamber of the piston cylinder, the other intelligent control system pilot valve controls the pressure relief of the lower chamber or the upper chamber of the piston cylinder, thereby driving the piston rod to move, and when the piston rod moves, the valve stem and the butterfly plate are driven to move through the rocker arm, so as to achieve the purpose of reducing water loss and eliminating water hammer.

[0006] Furthermore, the intelligent control system pilot valve comprises a pilot valve body and a pilot valve core, the pilot valve core is located in the cavity of the pilot valve body; a first inlet is provided at one end of the pilot valve body, a second inlet is provided at the other end, and a first outlet and a second outlet facing both sides are provided in the middle; the cavity of the pilot valve body is divided into a first inlet cavity corresponding to the first inlet, a second inlet cavity corresponding to the second inlet, and a sealing cavity between the first inlet cavity and the second inlet cavity, and the length of the first inlet cavity is longer than that of the second inlet cavity;

[0007] The pilot valve core includes a sealing section located in the sealing cavity and a first matching section on both sides of the sealing section that matches the first inlet and a second matching section that matches the second inlet, wherein the first matching section is longer than the second matching section; the diameter of the sealing section is larger than the inner diameter of the first inlet cavity and the inner diameter of the second inlet cavity, and the diameter of the first matching section is smaller than the inner diameter of the first inlet cavity, and the diameter of the second matching section is smaller than the inner diameter of the second inlet cavity; the first outlet is located on the pilot valve body corresponding to the first matching section, and the second outlet is located on the pilot valve body corresponding to the sealing section on the other side, and a sealing member is installed at one end of the first matching section away from the sealing section. With the water pressure difference between the first inlet and the second inlet, the sealing section moves left and right, and when the first inlet cavity is sealed, the second inlet and the second outlet are connected; when the second inlet cavity is sealed, the first outlet and the second outlet are connected.

[0008] Furthermore, sealing members are also installed on both sides of the sealing section, and the first outlet is located between the sealing member on one side of the sealing section at the first matching section and the sealing member at one end of the first matching section away from the sealing section.

[0009] Furthermore, one end of the first matching section close to the sealing section, one end away from the sealing section, and one end of the second matching section close to the sealing section are respectively provided with sealing grooves, and the device is installed in the sealing grooves.

[0010] Preferably, the sealing element is an O-ring.

[0011] Furthermore, the intelligent control system pilot valve connected to the inlet of the lower chamber of the piston cylinder is a first intelligent control system pilot valve, whose first inlet is connected to the water outlet, the second inlet is connected to the water inlet, the first outlet is connected to the water pump inlet or the water pool, and the second outlet is connected to the inlet of the lower chamber of the piston cylinder.

[0012] Furthermore, the first outlet of the first intelligent control system pilot valve is provided with two parallel pipelines, one of which is provided with a travel switch and the other is provided with a flow regulating valve.

[0013] Furthermore, the intelligent control system pilot valve connected to the upper chamber inlet of the piston cylinder is a second intelligent control system pilot valve, whose first inlet is connected to the water inlet end, the second inlet is connected to the water outlet end, the first outlet is connected to the water pump inlet or the water pool, and the second outlet is connected to the lower chamber inlet of the piston cylinder.

[0014] Furthermore, the water inlet end of the valve body is provided with a water inlet port, and the water outlet end is provided with a water outlet port, and each intelligent control system pilot valve is respectively connected to the water inlet port and the water outlet port through a pipeline.

[0015] Furthermore, each intelligent control system pilot valve is respectively connected to the water inlet at the water inlet and the water outlet at the water inlet, and a ball valve is provided on each pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) When the butterfly valve is opened, the present invention controls the piston rod to push the rocker arm through the intelligent control system pilot valve, driving the valve stem and the butterfly plate to assist in opening, ensuring that the water loss is small when the valve is running and achieving energy saving effect;

[0018] (2) When the water flow stops and the butterfly valve is closed, the intelligent control system pilot valve controls the piston rod to push the rocker arm, driving the valve stem and the butterfly plate to close quickly, and the stroke switch and the flow control valve are used to control the butterfly plate to close slowly in the later stage of the closing process. By dividing the closing into two steps, fast and slow, the effect of preventing backflow and reducing water hammer pressure is achieved;

[0019] (3) The present invention is light in size, reduces equipment costs, is easy to install, and has a good sealing effect; it runs smoothly, without vibration or noise, is safe, stable, reliable, wear-resistant, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the pilot valve of the intelligent control system according to an embodiment of the present invention.

[0022] in:

[0023] 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Piston cylinder; 5. Piston cylinder upper chamber inlet;

[0024] 6. Inlet of the lower chamber of the piston cylinder; 7. Water inlet at the water inlet end; 8. Water inlet at the water outlet end;

[0025] 9. First intelligent control system pilot valve; 10. Second intelligent control system pilot valve; 11. Travel switch;

[0026] 12. Flow control valve; 13. Control butterfly plate to close the pressure relief pipeline; 14. Control butterfly plate to quickly close the pressure relief pipeline;

[0027] 15. Control the butterfly plate to slowly close the pressure relief pipeline; 16. Control the butterfly plate to open the drag reduction power pipeline;

[0028] 17. Control the butterfly plate to open the resistance reduction and pressure relief pipeline; 18. Control the butterfly plate to close the power-assisting pipeline; 19. Ball valve;

[0029] 20. First inlet; 21. Second inlet; 22. First outlet; 23. Second outlet; 24. Pilot valve body;

[0030] 25. Sealing section; 26. First matching section; 27. Second matching section; 28. First inlet cavity;

[0031] 29. Second inlet chamber; 30. Sealing chamber; 31. Sealing element; 32. Rocker arm; 33. Butterfly plate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] The novel butterfly type intelligent pump automatic control valve proposed in the present invention is mainly composed of a valve body 1, a butterfly plate 33, a valve stem, a piston cylinder 4, an intelligent control system pilot valve, a flow regulating valve 13, a travel switch 12, a ball valve 19, a control pipeline, etc.

[0036] like Figure 1 As shown, the valve body 1 is provided with a water inlet 2 and a water outlet 3, the water inlet 2 is provided with a water inlet port 7, and the water outlet 3 is provided with a water outlet port 8; the piston rod of the piston cylinder 4 is connected to the valve stem and the butterfly plate 33 through a rocker arm 32; the piston cylinder 4 is provided with a piston cylinder upper chamber inlet 5 and a piston cylinder lower chamber inlet 6, the piston cylinder upper chamber inlet 5 is connected to a first intelligent control system pilot valve 9, the piston cylinder lower chamber inlet 6 is connected to a second intelligent control system pilot valve 10, and the first intelligent control system pilot valve 9 and the second intelligent control system pilot valve 10 are respectively connected to the water inlet 2 and the water outlet 3 in opposite directions.

[0037] The structures of the first intelligent control system pilot valve 9 and the second intelligent control system pilot valve 10 are the same. Figure 2 The figure shows a pilot valve structure of an intelligent control system, including a pilot valve body 24 and a pilot valve core, wherein the pilot valve core is located in the cavity of the pilot valve body 24; a first inlet 20 is provided at the left end of the pilot valve body 24, a second inlet 21 is provided at the right end, a first outlet 22 facing downward and a second outlet 23 facing upward are provided in the middle; the cavity of the pilot valve body 24 is divided into a first inlet cavity 28 corresponding to the first inlet 20, a second inlet cavity 29 corresponding to the second inlet 21', and a sealing cavity 30 between the first inlet cavity 28 and the second inlet cavity 29, wherein the first inlet cavity 28 is longer than the second inlet cavity 29;

[0038] The pilot valve core includes a sealing section 25 located in the sealing cavity 30, a first matching section 26 connected to the left side of the sealing section 25 and matched with the first inlet, and a second matching section 27 connected to the right side of the sealing section 25 and matched with the second inlet, wherein the first matching section 26 is longer than the second matching section 27; the diameter of the sealing section 25 is larger than the inner diameter of the first inlet cavity 28 and the inner diameter of the second inlet cavity 29, and the diameter of the first matching section 26 is smaller than the inner diameter of the first inlet cavity 28, and the diameter of the second matching section 27 is smaller than the inner diameter of the second inlet cavity 29; a sealing groove is provided at one end of the first matching section 26 away from the sealing section 25, and a sealing member 31 is installed therein; sealing grooves are respectively provided on both sides of the sealing section 25, i.e., one end of the first matching section 26 close to the sealing section 25 and one end of the second matching section 27 close to the sealing section 25, and a sealing member 31 is arranged in the sealing groove; the sealing member 31 is an O-ring in this embodiment.

[0039] The first outlet 22 is located below the pilot valve body 24 , corresponding to the portion between the seals at both ends of the first matching section 26 , and the second outlet 23 is located above the pilot valve body 24 , corresponding to the sealing section 25 .

[0040] The intelligent control system pilot valve can move the sealing section 25 left and right according to the water pressure difference between the first inlet 20 and the second inlet 21. When the sealing section 25 seals the first inlet cavity 28, the second inlet 21 and the second outlet 23 are connected; when the sealing section 25 seals the second inlet cavity 29, the first outlet 22 and the second outlet 23 are connected.

[0041] When the intelligent control system pilot valve is used as the first intelligent control system pilot valve 9 and the second intelligent control system pilot valve 10 in the present invention, Figure 1 As shown, the first inlet 20 of the first intelligent control system pilot valve 9 is connected to the water outlet water intake 8 of the water outlet end 3 through a pipeline, and a ball valve 19 is provided on the pipeline; the second inlet 21 is connected to the water inlet water intake 7 of the water inlet end 2 through a pipeline, and a ball valve 19 is provided on the pipeline; the second outlet 23 is connected to the piston cylinder lower chamber inlet 6 by opening the drag reduction power-assisting pipeline 16 through the control butterfly plate; the first outlet 22 is connected to the water pump inlet or the water pool by closing the pressure relief pipeline 13 through the control butterfly plate, and the butterfly plate closing the pressure relief pipeline 13 is divided into a parallel control butterfly plate fast closing pressure relief pipeline 14 and a control butterfly plate slow closing pressure relief pipeline 15, and the control butterfly plate fast closing pressure relief pipeline 14 is provided with a travel switch 11, and the control butterfly plate slow closing pressure relief pipeline 15 is provided with a flow regulating valve 12.

[0042] The connection direction of the second intelligent control system pilot valve 10 is opposite to that of the first intelligent control system pilot valve 9. Figure 1As shown, the first inlet 20 is connected to the water inlet end water intake 7 of the water inlet end 2 through a pipeline, and a ball valve 19 is provided on the pipeline; the second inlet 21 is connected to the water outlet end water intake 8 of the water outlet end 3 through a pipeline, and a ball valve 19 is provided on the pipeline; the second outlet 23 is connected to the piston cylinder upper chamber inlet 5 by closing the power-assisting pipeline 18 through the control butterfly plate; the first outlet 22 is connected to the water pump inlet or the water tank by opening the drag reduction and pressure relief pipeline 17 through the control butterfly plate.

[0043] When the present invention is working, the butterfly plate 33 automatically opens to allow the medium to pass through by virtue of the flow velocity and water head of the medium at the water inlet end 2. At the same time, the pressure water at both ends of the valve body 1 flows to both ends of the intelligent control system pilot valve through their own pipelines and ball valves. When the pressure at the water inlet end 2 of the valve is greater than the pressure at the water outlet end 3, the sealing section 25 of the first intelligent control system pilot valve 9 moves left to seal the first inlet cavity 28, and the second inlet 21 and the second outlet 23 are connected; the pressure water at the water inlet end 2 passes through the second outlet 23, the control butterfly plate opens the drag reduction and booster pipeline 16, and the piston cylinder lower cavity inlet 6 in turn to enter the piston cylinder lower cavity; when the pressure at the water inlet end 2 of the valve is greater than the pressure at the water outlet end 3, the second intelligent control system pilot valve 10 moves left to seal the first inlet cavity 28, and the second inlet 21 and the second outlet 23 are connected; the pressure water at the water inlet end 2 passes through the second outlet 23, the control butterfly plate opens the drag reduction and booster pipeline 16, and the piston cylinder lower cavity inlet 6 to enter the piston cylinder lower cavity; Under the action of pressure, its sealing section 25 moves left to seal the second inlet cavity 29, and its first outlet 22 and second outlet 23 are connected. The pressure water in the upper cavity of the piston cylinder passes through the upper cavity inlet 5 of the piston cylinder, the control butterfly plate closing the power-assisting pipeline 18, the second outlet 23, the first outlet 22, and the control butterfly plate opening the resistance-reducing and pressure-relief pipeline 17 to enter the water pump inlet or the water pool for pressure relief; at this time, the piston rod is pushed out from the cavity of the piston cylinder 4, pushing the rocker arm 32 on the piston rod, driving the valve stem and the butterfly plate 33 to assist in opening, ensuring that the water loss is small when the valve is running and achieving energy-saving effect.

[0044] When the water flow stops (such as the water pump suddenly stops running), the butterfly plate 33 is automatically closed due to the deadweight of the butterfly plate 33 and the backflow of water. At the same time, the pressure water at both ends of the valve body 1 flows to the two ends of the intelligent control system pilot valve through their own pipelines and ball valves. When the pressure at the valve outlet end 3 is greater than the pressure at the water inlet end 2, the sealing section 25 of the second intelligent control system pilot valve 10 moves to the right to seal the first inlet cavity 28, and the second inlet 21 and the second outlet 23 are connected; the pressure water at the water outlet end 3 passes through the second outlet 23, the control butterfly plate closes the auxiliary pipeline 18, and the piston cylinder upper cavity inlet 5 to enter the upper cavity of the piston cylinder; when the pressure at the valve outlet end 3 is greater than the pressure at the water inlet end 2, the sealing section 25 of the first intelligent control system pilot valve 9 moves to the right to seal the second inlet cavity 29, and the first outlet 22 and the second outlet 23 are connected. The pressure water in the lower cavity of the piston cylinder passes through the lower cavity inlet 6 of the piston cylinder, the control butterfly plate opens the drag reduction auxiliary pipeline 16, the second outlet 23, the first outlet 22, and the first outlet 23. , the control butterfly plate closes the pressure relief pipeline 13 to enter the water pump inlet or the water pool for pressure relief. Since the butterfly plate closing pressure relief pipeline 13 is divided into a parallel control butterfly plate quick-closing pressure relief pipeline 14 and a control butterfly plate slow-closing pressure relief pipeline 15, the control butterfly plate quick-closing pressure relief pipeline 14 is provided with a travel switch 11, and the control butterfly plate slow-closing pressure relief pipeline 15 is provided with a flow regulating valve 12. At this stage, the travel switch is closed, and the pressure water mainly enters the water pump inlet or the water pool quickly from the control butterfly plate quick-closing pressure relief pipeline 14 to relieve pressure; at this time, the piston rod retracts quickly, pulling the rocker arm 32 on the piston rod, driving the valve stem and the butterfly plate 33 to close quickly; when the butterfly plate 33 is quickly closed by 85%, the travel switch 11 is started to close the butterfly plate quick-closing pressure relief pipeline 14, and the butterfly plate slow-closing pressure relief pipeline 13 passes through the flow regulating valve to slowly close the butterfly plate 33, thereby reducing the water hammer pressure.

[0045] The flow regulating valve 12 can accurately control the flow of the pressure relief water in the lower chamber of the piston cylinder according to the time of the water hammer peak, the size of the water hammer and the reverse speed of the water pump, that is, control the slow closing time of the butterfly plate 33. This time can be adjusted arbitrarily from zero to 60 seconds.

[0046] As described above, the closing of the butterfly plate 33 is divided into two steps: fast closing and slow closing, which achieves the effect of preventing backflow and reducing water hammer.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of butterfly type intelligent pump automatic control valve, characterized in that: It includes a valve body, a butterfly plate, a valve stem, and a piston cylinder; the valve body is provided with a water inlet end and a water outlet end, and the piston rod of the piston cylinder is connected to the valve stem and the butterfly plate through a rocker arm; the piston cylinder is provided with an upper chamber inlet of the piston cylinder and a lower chamber inlet of the piston cylinder, and the upper chamber inlet of the piston cylinder and the lower chamber inlet of the piston cylinder are respectively connected to an intelligent control system pilot valve, and the two intelligent control system pilot valves are respectively connected to the water inlet end and the water outlet end in opposite directions, and the changes of water inlet and pressure relief of the upper chamber and the lower chamber of the piston cylinder are controlled according to the pressure difference change between the water inlet end and the water outlet end, thereby driving the piston rod to move; The intelligent control system pilot valve comprises a pilot valve body and a pilot valve core, wherein the pilot valve core is located in the cavity of the pilot valve body; a first inlet is provided at one end of the pilot valve body, a second inlet is provided at the other end, and a first outlet and a second outlet facing two sides are provided in the middle; the cavity of the pilot valve body is divided into a first inlet cavity corresponding to the first inlet, a second inlet cavity corresponding to the second inlet, and a sealing cavity between the first inlet cavity and the second inlet cavity, wherein the length of the first inlet cavity is longer than that of the second inlet cavity; The pilot valve core includes a sealing section located in the sealing cavity and a first matching section on both sides of the sealing section matching with the first inlet and a second matching section matching with the second inlet, wherein the first matching section is longer than the second matching section; the diameter of the sealing section is larger than the inner diameter of the first inlet cavity and the inner diameter of the second inlet cavity, and the diameter of the first matching section is smaller than the inner diameter of the first inlet cavity, and the diameter of the second matching section is smaller than the inner diameter of the second inlet cavity; the first outlet is located on the pilot valve body corresponding to the first matching section, and the second outlet is located on the pilot valve body corresponding to the sealing section on the other side, and a sealing member is installed at one end of the first matching section away from the sealing section.

2. According to claim 1, a new type of butterfly type intelligent pump automatic control valve is characterized in that: Sealing members are also installed on both sides of the sealing section, and the first outlet is located between the sealing member on one side of the sealing section of the first matching section and the sealing member on one end of the first matching section away from the sealing section.

3. According to claim 2, a new type of butterfly type intelligent pump automatic control valve is characterized in that: An end of the first matching section close to the sealing section, an end away from the sealing section, and an end of the second matching section close to the sealing section are respectively provided with sealing grooves, and the said first matching section is installed in the sealing grooves.

4. According to claim 3, a new type of butterfly type intelligent pump automatic control valve is characterized in that: The sealing element is an O-ring.

5. According to claim 1, a new type of butterfly type intelligent pump automatic control valve is characterized in that: The intelligent control system pilot valve connected to the inlet of the lower chamber of the piston cylinder is a first intelligent control system pilot valve, whose first inlet is connected to the water outlet, the second inlet is connected to the water inlet, the first outlet is connected to the water pump inlet or the water pool, and the second outlet is connected to the inlet of the lower chamber of the piston cylinder.

6. According to claim 5, a new type of butterfly type intelligent pump automatic control valve is characterized in that: The first outlet of the first intelligent control system pilot valve is provided with two parallel pipelines, one of which is provided with a travel switch and the other is provided with a flow regulating valve.

7. According to claim 1, a new type of butterfly type intelligent pump automatic control valve is characterized in that: The intelligent control system pilot valve connected to the upper chamber inlet of the piston cylinder is a second intelligent control system pilot valve, whose first inlet is connected to the water inlet end, the second inlet is connected to the water outlet end, the first outlet is connected to the water pump inlet or the water pool, and the second outlet is connected to the lower chamber inlet of the piston cylinder.

8. According to claim 1, a novel butterfly type intelligent pump automatic control valve is characterized in that: The water inlet end of the valve body is provided with a water inlet water intake, and the water outlet end is provided with a water outlet water intake, and each intelligent control system pilot valve is respectively connected to the water inlet water intake and the water outlet water intake through a pipeline.

9. A novel butterfly type intelligent pump automatic control valve according to claim 8, characterized in that: Ball valves are arranged on each pipeline of each intelligent control system pilot valve connected to the water inlet at the water inlet end and the water outlet end.

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