CN204592328U - The micro-pump control valve that blocks water of a kind of swash plate - Google Patents

Abstract

The utility model relates to the micro-pump control valve that blocks water of a kind of swash plate, comprise valve body, ramp type flap, valve seat and the valve rod be arranged in valve channel, described flap is connected with valve body by valve rod, described control valve for water pump also comprises oil control device and air-control device, described oil control device is connected with valve body by fore poppet, described air-control device is connected with valve body by back poppet, and described valve rod is connected with fore poppet by front valve rod end, and is connected with back poppet by rear valve rod end.Compared with prior art, the utility model has that structure is simple, cost is low, resistance is low, Security is high, quick closedown, power failure quick closing valve, the advantage such as applied widely.

Description

A slant plate micro-resistance water pump control valve

technical field

The utility model relates to a water pump control valve, in particular to a slant plate micro-resistance water pump control valve.

Background technique

In the water supply system, in order to ensure the normal operation of the water pump and prevent the water hammer when the pump is turned on or the motor current is too high to trip and stop the pump, a water pump control valve is usually installed on the outlet pipe of the water pump. When the pump is stopped, it will be closed quickly and then slowly closed, and in the event of an emergency power failure, the valve can be automatically closed quickly and then slowly closed to prevent backflow. Currently, there is a cut-off pump control for water pump control on the market. valve (multifunctional water pump control valve), swing-open double-disc hydraulic control type water pump control valve, hydraulically driven butterfly valve (hydraulic control butterfly valve), the opening of the first two types of water pump control valves is affected by the water flow velocity, and the resistance coefficient is relatively large , the water loss is high, and the large-diameter valve occupies a huge space, it is very difficult to manufacture and install, and the control reliability is low. Although the hydraulically driven butterfly valve (hydraulic control butterfly valve) has improved in function control, it has a complex structure and high cost. At the same time, the domestic hydraulic station has poor reliability, high failure rate, and difficult debugging and maintenance.

Chinese patent CN1598371A discloses a slanting plate type translational butterfly valve, which consists of a driving device, a bracket, a valve body, a butterfly plate, a sealing ring, a pressure plate, a bearing, a packing, a packing gland, an upper valve shaft, a lower valve shaft, a shaft sleeve, and a gasket , positioning pins, nuts, end caps and other parts, the characteristics are: the butterfly plate is obliquely installed in the valve body at a certain angle, the shaft seat of the butterfly plate is a U-shaped groove, and the upper valve shaft and the lower valve shaft extend into the shaft seat. One end is milled into a flat surface and has a chute. The butterfly plate is connected with the upper valve shaft and the lower valve shaft through a threaded positioning pin. However, the valve cannot be closed quickly during use. The most important thing is that the valve is in emergency power failure When the valve cannot be closed automatically safely, it will cause the system to lose pressure and the reverse motor of the water pump will burn out, resulting in serious safety accidents, so the valve cannot be used for water pump control.

Utility model content

The purpose of this utility model is to provide a slant plate micro-resistance water pump control valve with simple structure, low cost, low resistance, high safety, fast closing, fast closing after power failure, and wide application range in order to overcome the above-mentioned defects in the prior art. .

The purpose of this utility model can be achieved through the following technical solutions:

A slant plate micro-resistance water pump control valve, comprising a valve body, a slant plate disc disposed in the channel of the valve body, a valve seat and a valve stem, the valve disc is connected to the valve body through the valve stem, and the water pump control The valve also includes an oil control device and an air control device, the oil control device is connected to the valve body through the front bracket, the air control device is connected to the valve body through the rear bracket, and the valve stem is connected to the front valve stem through the front valve stem end. The bracket is connected and is connected to the rear bracket by the rear stem end.

The oil control device includes an oil cylinder assembly and an oil pressure assembly connected to each other. The oil cylinder assembly includes an oil cylinder, an oil cylinder piston rod, a U-shaped slideway and an adjusting screw connected in sequence. The oil cylinder is hinged to the front bracket. The oil cylinder described above includes a rod chamber and a rodless chamber respectively connected with the hydraulic assembly, and the U-shaped slideway is connected with the front valve rod end through the front swing arm.

The hydraulic assembly includes an energy storage tank connected to the oil cylinder, a proximity switch set corresponding to the adjustment screw, a touch plate set on the front swing arm, and a travel switch set opposite to the touch piece. The proximity switch and the travel switch are respectively fixed on the front bracket, and the energy storage tank is fixed on the valve body.

The side oil port on the side wall of the energy storage tank is connected to the rod chamber oil inlet of the rod chamber through the first communication pipe, and is connected to the rod chamber oil outlet of the rod chamber through the second communication pipe. connected, the bottom oil port at the bottom of the energy storage tank is connected to the rodless chamber oil inlet port of the rodless chamber through the third communication pipe.

The first communicating pipe is provided with a first one-way throttle valve, the second communicating pipe is provided with an oil cylinder reset solenoid valve, and the third communicating pipe is provided with a second one-way throttle valve .

The energy storage tank is also provided with a pressure gauge, a gas injection source plug and an oil injection plug.

The air control device includes a cylinder hinged with the rear bracket, a cylinder piston rod, a rear swing arm and an electromagnetic reversing valve fixed on the valve body. The electromagnetic reversing valve, the cylinder, the cylinder piston rod, and the rear swing arm It is connected with the rear valve rod end in turn, and the electromagnetic reversing valve is respectively connected with the upper air port and the lower air port of the cylinder through the air pipe.

The electromagnetic reversing valve is provided with a steam-water separator.

One end of the front swing arm is provided with a roller, and the other end is connected to the front valve stem end, and the front swing arm is rollingly connected with the chute on the U-shaped slideway through the roller.

The inside of the energy storage tank is filled with compressed air and hydraulic oil.

Compared with the prior art, the utility model has the following advantages:

1. Simple structure and low cost: The slant plate type waterproof hammer water pump control valve of the utility model has a simple and reasonable structure, low manufacturing cost, small main valve size, small footprint, and is convenient for assembly and maintenance.

2. Low resistance and high safety: This utility model adopts the design of combining the oil control system and the air control system. The oil cylinder plays the role of slow opening and closing of the valve disc, and the cylinder plays the role of making the valve disc even when the flow rate is very low. It can also be fully opened under emergency power failure and can be quickly closed in case of emergency power failure, so that it can automatically realize the process of controllable slow opening to full opening according to the pump startup requirements, avoiding water hammer when opening the valve and motor tripping. When the pump is stopped, it can also automatically realize the two-stage closing process of fast closing and slow closing according to the flow rate of the medium, avoiding the phenomenon of water hammer when the pump is stopped, and can well protect the safety of the pump, motor and pipeline.

3. Quick closing: the upper end of the piston rod of the oil cylinder is provided with a closed U-shaped slideway, and the upper part of the slideway is provided with an adjusting screw, and the front swing arm that drives the valve disc to rotate is nested in the closed U-shaped slideway through the roller. Its main function is The front swing arm can get rid of the damping of the oil cylinder during quick closing. In addition, the relative movement between the front swing arm and the closed U-shaped slideway is not sliding friction, but rolling friction, so the friction coefficient is very small, and the movement resistance of quick closing is greatly reduced. Under the rapid closing of the cylinder, the fast closing time is greatly shortened, so that the fast closing time is less than or equal to 0.5 seconds.

4. Slow closing: The slow closing of the valve is controlled by throttling and damping of the oil cylinder, which is stable and reliable.

5. Power failure fast closing: due to the implementation of pump valve linkage, when the emergency power failure occurs, the gas source is under the pressure of the gas storage tank. After the electromagnetic reversing valve is powered off, the air flow of the cylinder is instantly reversed, driving the piston rod of the cylinder to move upward, making The valve closes quickly, and at the same time, due to the damping effect of the oil cylinder, the valve closes quickly and then slowly closes, preventing backflow and ensuring the safety of the pump motor.

6. Wide range of application: The utility model is equipped with an adjusting screw on the U-shaped slideway, which can meet the requirements of different working conditions for the rapid valve closing stroke.

Description of drawings

Fig. 1 is a front view of the utility model water pump control valve fully closed position structure.

Fig. 2 is a rear view of the structure of the water pump control valve in the fully closed position of the utility model.

Fig. 3 is a cross-sectional view of the structure of the water pump control valve in the fully closed position of the utility model.

Figure 4 is a schematic diagram of the principle of the slow opening process of the water pump control valve of the present invention, wherein Figure (4a) is a schematic diagram of the oil control device during the slow opening process, Figure (4b) is a schematic diagram of the air control device during the slow opening process, and Figure (4c) It is a schematic diagram of the disc movement during the slow opening process.

Fig. 5 is a schematic diagram of the principle of the quick-closing process of the water pump control valve of the present invention, wherein, Fig. (5a) is a schematic diagram of the oil control device during power-off and quick-closing process, and Fig. (5b) is a schematic diagram of the air control device during power-off and quick-closing process, Figure (5c) is a schematic diagram of the movement of the disc during the quick closing process when the power is off.

Figure 6 is a schematic diagram of the principle of the slow closing process of the water pump control valve of the present invention, wherein Figure (6a) is a schematic diagram of the oil control device during the slow closing process, Figure (6b) is a schematic diagram of the air control device during the slow closing process, and Figure (6c) It is a schematic diagram of valve clack movement during slow closing process.

Figure 7 is a schematic diagram of the principle of the automatic reset process of the water pump control valve of the present invention, wherein Figure (7a) is a schematic diagram of the oil control device during the automatic reset process, Figure (7b) is a schematic diagram of the air control device during the automatic reset process, and Figure (7c) It is a schematic diagram of the movement of the disc during the automatic reset process.

Among them, 1. valve body, 2. disc, 3. valve stem, 31. front stem end, 32. rear valve stem end, 4. front bracket, 5. rear bracket, 6. front swing arm, 7. rear Swing arm, 8, oil cylinder, 81, rod chamber oil inlet, 82, rod chamber oil outlet, 83, rodless chamber oil inlet, 9, oil cylinder piston rod, 10, energy storage tank, 11, The first one-way throttle valve, 12, the second one-way throttle valve, 13, the oil cylinder reset solenoid valve, 14, the stroke switch, 15, the proximity switch, 16, the cylinder, 161, the upper air port, 162, the lower air port, 17 , cylinder piston rod, 18, electromagnetic reversing valve, 19, steam-water separator, 20, U-shaped slideway, 21, adjusting screw, 22, gas injection source plug, 23, oil injection plug, 24, pressure gauge, 25, the first One connecting pipe, 26, the second connecting pipe, 27, the third connecting pipe, 28, the contact piece, 29, the valve seat.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

As shown in Fig. 1-3, a slant plate micro-resistance water pump control valve includes a valve body 1, a slant plate disc 2 arranged in the channel of the valve body 1, a valve seat 29 and a valve stem 3, and the valve disc 2 passes through the valve The rod 3 is connected to the valve body 1, and the water pump control valve also includes an oil control device and an air control device. The oil control device is connected to the valve body 1 through the front bracket 4, the air control device is connected to the valve body 1 through the rear bracket 5, and the valve stem 3 The front stem end 31 is connected to the front bracket 4, and is connected to the rear bracket 5 through the rear stem end 32. The valve disc 2 is an eccentric slant plate type, fixed at the middle position of the valve stem 3, and rotates around the valve stem 3 when opening and closing. The seat 29 is placed in the valve body 1 and is sealed with the sealing surface of the valve disc 2. The valve stem 3 adopts an integral shaft type and runs through the front and rear shaft holes of the valve body 1. The front bracket 4 is fixed on the end surface of the front shaft hole of the valve body 1. Above, the rear bracket 5 is fixed on the end surface of the rear axle hole of the valve body 1 .

The oil control device includes an oil cylinder assembly and an oil pressure assembly connected to each other. The oil cylinder assembly includes an oil cylinder 8, an oil cylinder piston rod 9, a U-shaped slideway 20 and an adjusting screw 21 connected in sequence. The oil cylinder 8 is hinged with the front bracket 4. The oil cylinder 8 includes respectively The rod chamber and the rodless chamber connected with the hydraulic assembly, the U-shaped slideway 20 is connected to the front valve stem end 31 through the front swing arm 6, one end of the front swing arm 6 is provided with a roller, and the other end is connected to the front valve stem end 31 , the front swing arm 6 is rollingly connected with the chute on the U-shaped slideway 20 by rollers.

The hydraulic assembly includes an energy storage tank 10 connected to the oil cylinder 8, a proximity switch 15 corresponding to the adjustment screw 21, a touch piece 28 set on the front swing arm 6, and a travel switch 14 opposite to the touch piece 28, The proximity switch 15 and the travel switch 14 are respectively fixed on the front bracket 4, and the energy storage tank 10 is fixed on the valve body.

The side oil port on the side wall of the energy storage oil storage tank 10 is connected with the rod chamber oil inlet 81 of the rod chamber through the first communication pipe 25, and is connected with the rod chamber oil outlet of the rod chamber through the second communication pipe 26. The bottom oil port at the bottom of the energy storage tank 10 is connected to the rodless cavity oil inlet 83 of the rodless cavity through the third connecting pipe 27, and the energy storage tank 10 is filled with compressed air and hydraulic oil , the energy storage oil storage tank 10 is also provided with a pressure gauge 24, a gas injection source plug 22 and an oil injection plug 23, a certain amount of hydraulic oil is injected into the tank through the oil injection plug 23, and a certain pressure is injected into the tank through the gas injection source plug 22 of compressed air.

The first connecting pipe 25 is provided with a first one-way throttle valve 11, the second connecting pipe 26 is provided with an oil cylinder reset solenoid valve 13, and the third connecting pipe 27 is provided with a second one-way throttle valve 12. The direction setting of the one-way throttle valve 11 and the second one-way throttle valve 12 is not throttling when entering oil into the oil cylinder 8, and throttling is when discharging oil from the oil cylinder 8 to the energy storage tank 10.

The air control device comprises a cylinder 16 hinged with the rear bracket 5, a cylinder piston rod 17, a rear swing arm 7 and an electromagnetic reversing valve 18 fixed on the valve body, the electromagnetic reversing valve 18, the cylinder 16, the cylinder piston rod 17, the rear The swing arm 7 is connected with the rear valve stem end 32 in sequence, and the electromagnetic reversing valve 18 is respectively connected with the upper air port 161 and the lower air port 162 of the cylinder 16 through the air pipe, and the electromagnetic reversing valve 18 is provided with a steam-water separator 19.

The working principle of this design is as follows:

Figures 1-3 show the fully closed position of the valve. At this time, the piston rod 9 of the oil cylinder is in a fully extended state. One end of the front swing arm 6 is in contact with the bottom of the U-shaped slideway 20. The contact plate 28 just touches the travel switch 14, and the oil cylinder resets the electromagnetic The valve 13 is energized and opened, and the pressure oil in the energy storage oil storage tank 10 is injected into the oil cylinder 8 through the first communication pipe 25, the second communication pipe 26, and the third communication pipe 27 at the same time. The area is poor, so that the cylinder piston rod 9 always maintains an upward thrust on the front swing arm 6, while the cylinder piston rod 17 is in a fully contracted state. Since the upper air port 161 of the cylinder is in an inflated state, the cylinder piston rod 17 always maintains an upward thrust on the rear swing arm 7. The downward pulling force makes the valve clack 2 reliably close through the combination of one push and one pull.

As shown in Figure 4, Figure (4a) is the schematic diagram of the oil control device during the slow opening process, Figure (4b) is the schematic diagram of the air control device during the slow opening process, and Figure (4c) is the schematic diagram of the valve disc movement during the slow opening process , when the water pump is started, through delay control, after the water pump reaches the rated speed, the electromagnetic reversing valve 18 is energized and reversing, the compressed air is injected into the lower air port 162 of the cylinder 16 through the steam-water separator 19 through the electromagnetic reversing valve 18, and passed through The upper air port 161 of the cylinder is exhausted, and the cylinder piston rod 17 changes the pulling force to the rear swing arm 7 into a thrust force, and the cylinder piston rod 17 pushes the rear swing arm 7 to open the valve, while the oil cylinder piston rod 9 always maintains an upward thrust to the front swing arm 6 constant. Because the thrust of the cylinder piston rod 17 is greater than the resistance of the cylinder 8 and the valve disc 2, but is restrained by the damping of the oil cylinder 8, the front swing arm 6 pushes the cylinder piston rod 9 to move slowly downwards, and then drives the valve disc 2 to open slowly and touch The piece 28 is separated from the travel switch 14 contacts, the oil cylinder reset solenoid valve 13 is powered off and closed, the second communication pipe 26 is disconnected from the rod cavity of the oil cylinder 8, and the second one-way throttle valve 12 can be adjusted to set the valve flap 2. Turn on speed. During this process, due to the assisting thrust of the cylinder piston rod 17, the oil cylinder piston rod 9 works in a state of slight resistance. Even if the flow rate of the medium is close to zero, the valve disc 2 can still be fully opened smoothly, and the water loss is minimized, reaching Energy saving effect.

As shown in Figure 5, among them, Figure (5a) is the schematic diagram of the oil control device in the process of power-off and quick-off, Figure (5b) is the schematic diagram of the air-control device in the process of power-off and quick-off, and Figure (5c) is the schematic diagram of the power-off and quick-off Schematic diagram of the disc movement during the process, the stroke of quick closing is 70%-85%, when the water pump suddenly cuts off the power and stops the pump, the electromagnetic reversing valve 18 receives the signal to reversing when the power is turned off, and the compressed air passes through the steam-water separator 19 through the electromagnetic reversing The valve 18 is injected into the upper air port 161 of the cylinder 16, and the exhaust is exhausted through the lower air port 162 of the cylinder 16. The cylinder piston rod 17 changes from thrust to the rear swing arm 7 in an instant. Fast automatic closing, but the U-shaped slideway 20 stroke of oil cylinder piston rod 9 tops has limited the continuation rotation of front swing arm 6, makes valve clack 2 can not close completely immediately. At this time, the rodless chamber of oil cylinder 8 enters oil, and the rod chamber throttles and discharges oil. The piston rod 9 of the oil cylinder drives the front swing arm 6 to make the valve disc 2 continue to close slowly. After the valve disc 2 is completely closed, as shown in Figure 6, Figure (6a) is the schematic diagram of the oil control device during the slow closing process, Figure (6b) is the schematic diagram of the air control device during the slow closing process, and Figure (6c) is the schematic diagram of the slow closing process. Schematic diagram of the movement of the disc during the closing process. The stroke of slow closing is 15%-30%. A large amount of oil is discharged from the rod cavity, and the piston rod 9 of the oil cylinder quickly resets upward, as shown in Figure 7, where Figure (7a) is the schematic diagram of the oil control device during the automatic reset process, and Figure (7b) is the schematic diagram of the air control device during the automatic reset process , Figure (7c) is a schematic diagram of the movement of the disc during the automatic reset process, and the proximity switch 15 transmits the reset signal to the central control room. During this process, adjusting the height of the adjusting screw 21 can set the stroke of the valve clack 2 to quickly close, and adjusting the one-way throttle valve 11 can set the speed of the valve clack 2 to slowly close. The two-stage closing process of fast closing and slow closing can avoid and eliminate water hammer and protect the pipe network.

Claims (10)

1. A slant plate micro-resistance pump control valve, comprising a valve body (1), a slant plate disc (2), a valve seat (29) and a valve stem (3) arranged in the passage of the valve body (1), the The valve clack (2) is connected to the valve body (1) through the valve rod (3), and it is characterized in that the water pump control valve also includes an oil control device and an air control device, and the oil control device is passed through the front bracket ( 4) It is connected with the valve body (1), the air control device is connected with the valve body (1) through the rear bracket (5), and the valve stem (3) is connected with the front bracket ( 4) connected, and connected with the rear bracket (5) through the rear stem end (32). 2. A swash plate micro-resistance water pump control valve according to claim 1, wherein the oil control device includes an oil cylinder assembly and an oil pressure assembly connected to each other, and the oil cylinder assembly includes successively connected oil cylinders (8), oil cylinder piston rod (9), U-shaped slideway (20) and adjusting screw rod (21), described oil cylinder (8) is hinged with front support (4), and described oil cylinder (8) includes respectively The rod chamber and the rodless chamber connected by the hydraulic assembly, the U-shaped slideway (20) is connected with the front valve rod end (31) through the front swing arm (6). 3. A slant plate micro-resistance water pump control valve according to claim 2, characterized in that, the hydraulic assembly includes an energy storage tank (10) connected to the oil cylinder (8), and an adjustment screw ( 21) The corresponding proximity switch (15), the contact piece (28) arranged on the front swing arm (6) and the travel switch (14) arranged opposite to the contact piece (28), the proximity switch (15) and travel switch (14) are respectively fixed on the front bracket (4), and the described energy storage tank (10) is fixed on the valve body. 4. The control valve of a swash plate micro-resistance water pump according to claim 3, characterized in that, the side oil port on the side wall of the energy storage tank (10) is connected to the first communication pipe (25) The rod chamber oil inlet (81) of the rod chamber is connected, and is connected with the rod chamber oil outlet (82) of the rod chamber through the second connecting pipe (26), and the energy storage tank (10 ) The bottom oil port at the bottom of the tank is connected with the rodless chamber oil inlet (83) of the rodless chamber by the third communicating pipe (27). 5. The control valve of a swash plate micro-resistance water pump according to claim 4, characterized in that, the first communicating pipe (25) is provided with a first one-way throttle valve (11), and the The second communication pipe (26) is provided with an oil cylinder reset solenoid valve (13), and the third communication pipe (27) is provided with a second one-way throttle valve (12). 6. A slant plate micro-resistance water pump control valve according to claim 3, characterized in that, the energy storage tank (10) is also provided with a pressure gauge (24), a gas injection source plug (22 ) and oil plug (23). 7. The control valve of a swash plate micro-resistance water pump according to claim 1, characterized in that, the air control device comprises a cylinder (16) hinged to the rear bracket (5), a cylinder piston rod (17), The rear swing arm (7) and the electromagnetic reversing valve (18) fixed on the valve body, the electromagnetic reversing valve (18), the cylinder (16), the cylinder piston rod (17), the rear swing arm (7) It is connected with the rear valve rod end (32) in turn, and the electromagnetic reversing valve (18) is connected with the upper air port (161) and the lower air port (162) of the cylinder (16) through the air pipe respectively. 8. A slant plate micro-resistance water pump control valve according to claim 7, characterized in that, the electromagnetic reversing valve (18) is provided with a steam-water separator (19). 9. A slant plate micro-resistance water pump control valve according to claim 2, characterized in that, one end of the front swing arm (6) is provided with a roller, and the other end is connected to the front valve stem end (31), so that The aforementioned front swing arm (6) is rollingly connected with the chute on the U-shaped slideway (20) by rollers. 10. The control valve of a swash plate micro-resistance water pump according to claim 3, characterized in that, the inside of the energy storage tank (10) is filled with compressed air and hydraulic oil.