CN217107648U

CN217107648U - Proportional flow valve

Info

Publication number: CN217107648U
Application number: CN202221041842.8U
Authority: CN
Inventors: 王兰生; 梁立伟; 罗明强; 陈丽亚
Original assignee: Shijiazhuang Hydraulic Co ltd
Current assignee: Shijiazhuang Hydraulic Co ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-08-02
Anticipated expiration: 2032-05-05

Abstract

The utility model discloses a proportional flow valve, including valve body and oil inlet and the oil-out of setting on the valve body, the sealed choke valve subassembly that is linked together with the oil-out that is provided with can be dismantled in the inside of valve body, be provided with on the valve body and be used for carrying out the marching type actuating mechanism that the proportionality was adjusted to the volume of producing oil of choke valve subassembly, the sealed decompression valve subassembly that is provided with is used for making oil inlet and oil-out pressure keep unanimous can be dismantled to the inside of valve body, the oil feed end and the oil inlet of decompression valve subassembly are linked together, the end of producing oil of decompression valve subassembly is linked together through oil transportation passageway and choke valve subassembly oil feed end. The utility model discloses still set up the relief valve subassembly on the valve body, only need control step motor rotation angle's uniform variation, can realize the proportion regulation of flow for the last oil inlet of proportional flow valve keeps unanimous with the pressure of oil outlet department, guarantees the stability of flow, has realized proportional flow valve and has opened the requirement that the in-process is stabilized at a certain position at the valve port.

Description

Proportional flow valve

Technical Field

The utility model relates to a proportional flow valve technical field, more specifically relates to a proportional flow valve.

Background

The proportional flow valve is composed of proportional electromagnet and flow valve, and is characterized by that the proportional electromagnet is used to replace manual regulation device of throttle valve or speed-regulating valve, so that the electric signal can be inputted to change the opening of throttle valve to regulate flow rate of system. The proportional control is that the moving distance of a valve core of the proportional valve is controlled by changing the current value introduced by an internal coil of the proportional electromagnet through a controller, so that the opening amount of a valve port of the proportional valve is changed, and the proportional control is realized.

Although present proportional flow valve can realize flowing back flow's control, when the aperture of proportional flow valve port changed, draining volume crescent or reduction in draining mouth department, and the oil inlet volume of oil inlet department is unchangeable, can have certain pressure differential between the oil inlet on the proportional flow valve and the oil-out, lead to the oil flow unstable, the fluctuation of fluid flow is great, leads to proportional flow valve's regulation precision not good.

The electromagnetic force generated by the electromagnetic coil and the air gap are in an exponential relation, while the linear spring and the compression amount or the stretching amount are in a linear relation, under the same displacement, the electromagnetic force increment is larger than that of the linear spring, so that the valve core opening can be directly opened to the maximum. But the requirement that the proportional flow valve is stable at a certain position in the opening process of the valve port is difficult to meet, so that the linear relation between a flow output value and an input signal cannot be realized, and the proportional regulation of the flow cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a proportional flow valve to solve the problem in the background art, make the last oil inlet of proportional flow valve keep unanimous with the pressure of oil outlet department, guarantee the stability of flow, realize proportional flow valve and open the requirement that the in-process is stabilized at a certain position at the valve port.

In order to solve the technical problem, the utility model adopts the following technical proposal.

Proportional flow valve, including the valve body and oil inlet and the oil-out of setting on the valve body, the sealed choke valve subassembly that is linked together with the oil-out that is provided with can be dismantled to the inside of valve body, be provided with on the valve body and be used for carrying out the marching type actuating mechanism that proportionality was adjusted to the volume of producing oil of choke valve subassembly, the sealed decompression valve subassembly that is provided with can be dismantled to the inside of valve body is used for making oil inlet and oil-out pressure keep unanimous, the oil feed end and the oil inlet of decompression valve subassembly are linked together, the oil output end of decompression valve subassembly is linked together through oil transportation passageway and choke valve subassembly oil feed end.

According to the technical scheme, the pressure reducing valve assembly comprises a pressure reducing valve left end cover, a blocking cover, a pressure reducing valve sleeve and a pressure reducing valve right end cover which are sequentially and hermetically embedded in the valve body, the pressure reducing valve sleeve is provided with a pressure reducing valve sleeve oil inlet communicated with an oil inlet and a pressure reducing valve sleeve oil outlet communicated with an oil conveying channel, the pressure reducing valve sleeve is internally provided with a pressure reducing valve core in a sliding fit mode, the outer side wall of the pressure reducing valve core is provided with a first pressure reducing valve core protrusion and a second pressure reducing valve core protrusion, a first annular groove is formed between the first pressure reducing valve core protrusion and the second pressure reducing valve core protrusion, and an oil storage cavity is formed between the first annular groove and the inner wall of the pressure reducing valve sleeve; and the right end of the pressure reducing valve core is provided with a buffer component.

Further optimize technical scheme, buffer unit is including fixed the setting respectively at relief valve case right-hand member and the fixed support that sets up at relief pressure valve right-hand member end cover left end, is provided with relief pressure valve outer spring and relief pressure valve inner spring between two supports.

According to the technical scheme, a pressure reducing valve core oil inlet communicated with the oil storage cavity is formed in the side wall of the pressure reducing valve core, a pressure reducing valve core oil conveying channel communicated with the pressure reducing valve core oil inlet is formed in the middle of the pressure reducing valve core, and a high-pressure damper is arranged at the left end of the pressure reducing valve core oil conveying channel and abutted to the blocking cover.

The technical scheme is further optimized, and the throttle valve component comprises a throttle valve sleeve which is arranged in the valve body in a sealing and assembling mode, a throttle valve gland which is connected and arranged at the left end of the throttle valve sleeve and arranged in the valve body, and a throttle valve left end cover which is arranged at the left end of the throttle valve gland; a throttle valve core is arranged in the throttle valve sleeve, and a throttle valve sleeve oil inlet communicated with the oil delivery channel and a throttle valve sleeve oil outlet communicated with the oil outlet are formed in the throttle valve sleeve; a first annular bulge of the throttle valve core and a second annular bulge of the throttle valve core are integrally arranged on the side wall of the throttle valve core, and a second annular groove is formed between the first annular bulge of the throttle valve core and the second annular bulge of the throttle valve core; a spring cavity is arranged between the throttling valve core and the throttling valve gland, and a throttling valve spring connected with the throttling valve core is arranged in the spring cavity.

According to the technical scheme, the stepping type executing mechanism comprises a motor mounting end cover which is arranged inside the valve body in a sealing mode and located at the right end of the throttling valve core, the right end of the motor mounting end cover extends out of the valve body and is provided with the stepping motor in a positioning mode, a transmission lead screw is fixedly connected to the output shaft end of the stepping motor, a transmission nut is arranged on the transmission lead screw in a threaded assembling mode and is fixedly arranged at the left end of the motor mounting end cover, and the left end of the transmission lead screw is abutted to the right end of the throttling valve core.

According to the technical scheme, an oil drainage cavity is formed between the throttle valve sleeve and the transmission nut, an oil drainage channel is formed in the throttle valve core, one end of the oil drainage channel is communicated with the oil drainage cavity, the other end of the oil drainage channel is communicated with the spring cavity, and an oil drainage port communicated with the spring cavity is formed in the valve body.

Due to the adoption of the technical scheme, the utility model has the following technical progress.

The utility model discloses a control step motor rotation angle's mode and control the displacement situation of throttle valve core to still set up the relief valve subassembly on the valve body, only need control step motor rotation angle's uniform variation, can realize the proportion regulation of flow, make the last oil inlet of proportional flow valve keep unanimous with the pressure of oil outlet department, guarantee the stability of flow, realized proportional flow valve and opened the requirement that the in-process is stabilized at a certain position at the valve port.

Because of the utility model discloses a mode that step motor drive throttle case removed for throttle case's removal is more accurate, has realized that proportional flow valve opens the requirement that the in-process is stabilized at a certain position at the valve port.

The utility model discloses the fluid volume that the oil inlet got into can be controlled to the decompression valve subassembly that sets up, when the oil-out aperture reduces, the oil-out oil output reduces, because of the fluid in the first ring channel between decompression valve barrel and the decompression case increases, fluid can promote the decompression case and remove right, the decompression case moves the in-process right, the first arch of decompression case can reduce the aperture of oil-out for the fluid volume that enters into the oil inlet reduces, and then guarantees that the pressure between hydraulic fluid port and the oil-out keeps unanimous.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a top view of the present invention;

fig. 4 shows a hydraulic function symbol according to the present invention.

Wherein: 1. the left end cover of the pressure reducing valve, 2, the blanking cover, 3, the valve body, 4, the throttle gland, 5, the throttle valve sleeve, 6, the throttle valve spring, 7, the pressure reducing valve sleeve, 8, the high-pressure damper, 9, the throttle valve sleeve, 10, the support, 11, the pressure reducing valve outer spring, 12, the transmission nut, 13, the transmission screw rod, 14, the semicircular key, 15, the pressure reducing valve inner spring, 16, the Glare ring gland, 17, the right end cover of the pressure reducing valve, 18, the stepping motor, 19, the throttle valve core, 20, the pressure reducing valve core, 21, the process cover plate, 22, the low-pressure damper, 23, the plug, 24, the oil inlet, 25, the oil conveying channel, 26, the oil outlet, 27, the pressure reducing valve sleeve oil inlet, 28, the pressure reducing valve core, 29, the pressure reducing valve sleeve oil outlet, 30, the left end cover of the throttle valve, 31, the throttle valve sleeve oil inlet, 33, the motor mounting end cover, 34, the oil cavity, the oil drainage channel, 36, an oil drainage port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The proportional flow valve, as shown in fig. 1 to 4, includes a valve body 3, an oil inlet 24, an oil outlet 26, a throttle valve assembly, a step-by-step actuator, a pressure reducing valve assembly, and an oil delivery passage 25.

An oil inlet 24 and an oil outlet 26 are arranged on the valve body 3, the oil inlet 24 is a port P in fig. 4, and the oil outlet 26 is a port A in fig. 4.

The interior of the valve body 3 is detachably and hermetically provided with a pressure reducing valve assembly, and the pressure reducing valve assembly is used for keeping the pressure of the oil inlet 24 and the pressure of the oil outlet 26 consistent, so that the flow stability of the oil outlet is ensured. The oil inlet end of the pressure reducing valve assembly is communicated with the oil inlet 24, and the oil outlet end of the pressure reducing valve assembly is communicated with the oil inlet end of the throttle valve assembly through an oil conveying channel 25.

The pressure reducing valve assembly comprises a pressure reducing valve left end cover 1, a blocking cover 2, a pressure reducing valve sleeve 7 and a pressure reducing valve right end cover 17 which are sequentially and hermetically embedded in a valve body 3. The left end of the left end cover 1 of the pressure reducing valve is in contact with the outside atmosphere, and the right end of the left end cover 1 of the pressure reducing valve is abutted to the blocking cover 2. The blocking cover 2 is detachably arranged on the pressure reducing valve sleeve 7 through a bolt. The right end of the pressure relief valve right end cap 17 is in contact with the outside atmosphere.

The oil outlet 29 of the pressure reducing valve sleeve is communicated with the oil inlet 24, the pressure reducing valve sleeve oil inlet 27 is communicated with the oil delivery channel 25, the pressure reducing valve core 20 is arranged in the pressure reducing valve sleeve 7 in a sliding fit mode, a first pressure reducing valve core bulge and a second pressure reducing valve core bulge are arranged on the outer side wall of the pressure reducing valve core 20, the first pressure reducing valve core bulge is arranged on the left side of the oil outlet, a first annular groove is formed between the first pressure reducing valve core bulge and the second pressure reducing valve core bulge, and an oil storage cavity is formed between the first annular groove and the inner wall of the pressure reducing valve sleeve 7.

The right end of the pressure reducing valve core 20 is provided with a buffer assembly. The buffer assembly comprises support seats 10 which are respectively and fixedly arranged at the right end of the pressure reducing valve core 20 and the left end of a pressure reducing valve right end cover 17, and a pressure reducing valve outer spring 11 and a pressure reducing valve inner spring 15 are arranged between the two support seats 10.

The side wall of the pressure reducing valve core 20 is provided with a pressure reducing valve core oil inlet 28 communicated with the oil storage cavity, the middle part of the pressure reducing valve core 20 is provided with a pressure reducing valve core oil conveying channel communicated with the pressure reducing valve core oil inlet 28, the left end of the pressure reducing valve core oil conveying channel is provided with a high-pressure damper 8, and the high-pressure damper 8 is abutted to the blocking cover 2.

The inside of the valve body 3 is detachably and hermetically provided with a throttle valve assembly communicated with the oil outlet 26, and the valve body 3 is provided with a stepping execution mechanism for proportionally adjusting the oil output of the throttle valve assembly.

The throttle valve component comprises a throttle valve sleeve 5 which is arranged in the valve body 3 in a sealing fit mode, a throttle valve gland 4 which is connected and arranged at the left end of the throttle valve sleeve 5 and arranged in the valve body, and a throttle valve left end cover 30 arranged at the left end of the throttle valve gland 4. A throttle valve core 19 is arranged in the throttle valve sleeve 5, and a throttle valve sleeve oil inlet 31 communicated with the oil delivery channel 25 and a throttle valve sleeve oil outlet communicated with the oil outlet 26 are arranged on the throttle valve sleeve 5.

The side wall of the throttle valve core 19 is integrally provided with a first annular bulge of the throttle valve core and a second annular bulge of the throttle valve core, and a second annular groove is formed between the first annular bulge of the throttle valve core and the second annular bulge of the throttle valve core. When the throttle valve core 19 moves, the throttle valve core second annular bulge is positioned at the oil outlet 26, and when the throttle valve core moves, the opening degree of the oil outlet 26 is controlled through the throttle valve core second annular bulge.

A spring cavity is arranged between the throttle valve core 19 and the throttle valve gland 4, and a throttle valve spring 6 connected with the throttle valve core 19 is arranged in the spring cavity.

The stepping actuating mechanism comprises a motor mounting end cover 33, a stepping motor 18, a transmission screw rod 13 and a transmission nut 12. The motor mounting end cover 33 is arranged inside the valve body in a sealing mode and located at the right end of the throttle valve core 19, the right end of the motor mounting end cover 33 extends out of the valve body and is provided with the stepping motor 18 in a positioning mode, the output shaft end of the stepping motor 18 is connected with the transmission screw 13 through the semicircular key 14, the transmission screw 13 is provided with the transmission nut 12 in a threaded assembling mode, the transmission nut 12 is fixedly arranged at the left end of the motor mounting end cover 33, and the left end of the transmission screw 13 is abutted to the right end of the throttle valve core 19. When the stepping motor 18 operates, the driving screw 13 can be driven to drive, so that the throttle valve core 19 is pushed to move, and the purpose of controlling the size of the oil outlet 26 is achieved.

The motor mounting end cover 33 is also provided with a GREEN gland 16, and the transmission screw 13 is hermetically embedded in the GREEN gland 16.

An oil drainage cavity 34 is formed between the throttle valve sleeve 5 and the transmission nut 12, an oil drainage channel 35 with one end communicated with the oil drainage cavity 34 and the other end communicated with the spring cavity is arranged inside the throttle valve core 19, an oil drainage port 36 communicated with the spring cavity is arranged on the valve body 3, and the oil drainage port 36 is an L port in fig. 4. If part of the oil enters the oil drainage cavity 34 from the second annular groove or the oil outlet, the oil in the oil drainage cavity 34 can be discharged out of the valve body.

The utility model discloses fluid discharge process does: oil enters the pressure reducing valve sleeve 7 and the pressure reducing valve core 20 from the oil inlet, enters the throttle valve sleeve 5 through the oil conveying channel 25, and is discharged from the oil outlet formed between the throttle valve core 19 and the throttle valve sleeve 5.

The utility model discloses a throttle amount is adjusted and is accomplished by step motor 18, can realize through automatically controlled mode. The method comprises the following specific steps: the stepping motor 18 drives the transmission screw 13 to rotate, and the transmission screw 13 can move transversely when rotating because the transmission nut 12 is in a fixed state.

When the stepping motor 18 rotates clockwise, the transmission screw 13 moves leftwards, the throttle valve core 19 is pushed to move leftwards against the elastic force of the throttle valve spring 6, and the throttle valve core 19 extrudes the throttle valve spring 6. And in the leftward movement process of the throttle valve core 19, the opening between the second annular bulge of the throttle valve core and the oil outlet 26 is gradually increased, the flow rate of oil discharged from the oil outlet is increased, and the pressure difference between the oil inlet and the oil outlet is reduced.

When the opening degree of the oil outlet needs to be reduced, the stepping motor 18 rotates anticlockwise, the transmission lead screw 13 moves rightwards, the throttle valve core 19 moves rightwards under the elastic force action of the throttle valve spring 6, the opening degree of the oil outlet is reduced, the flow of oil discharged from the oil outlet is reduced, and the pressure difference between the oil inlet and the oil outlet is increased. In order to guarantee that the pressure between oil inlet and the oil-out keeps unanimous, the utility model discloses in oil inlet department set up the pressure relief valve subassembly. When the oil outlet volume of oil is reduced, because of the increase of the oil in the first annular groove between the pressure reducing valve sleeve 7 and the pressure reducing valve core, the oil can push the pressure reducing valve core to move rightwards, and in the process of the pressure reducing valve core moving rightwards, the first bulge of the pressure reducing valve core can reduce the opening degree of the oil outlet, so that the oil volume entering the oil inlet is reduced, and the pressure between the oil outlet and the oil outlet is kept consistent.

Because of the utility model discloses a control step motor 18 rotation angle's mode and control throttle valve core 19's displacement situation to still set up the relief valve subassembly on the valve body, only need control step motor 18 rotation angle's even change, can realize the proportional control of flow. Because the mode that the stepping motor 18 drives the throttle valve core to move is adopted, the movement of the throttle valve core is more accurate, and the requirement that the proportional flow valve is stabilized at a certain position in the opening process of the valve port is met.

Claims

1. Proportional flow valve, its characterized in that: including valve body (3) and oil inlet (24) and oil-out (26) of setting on valve body (3), the sealed throttle valve subassembly that is linked together with oil-out (26) that is provided with can be dismantled to the inside of valve body (3), be provided with on valve body (3) and be used for carrying out the marching type actuating mechanism of proportionality regulation to throttle valve subassembly oil output, the sealed decompression valve subassembly that is used for making oil inlet (24) and oil-out (26) pressure keep unanimous that is provided with can be dismantled to the inside of valve body (3), the oil inlet end and the oil inlet (24) of decompression valve subassembly are linked together, the oil outlet end of decompression valve subassembly is linked together through oil transportation passageway (25) and throttle valve subassembly oil inlet end.

2. The proportional flow valve of claim 1, wherein: the pressure reducing valve assembly comprises a pressure reducing valve left end cover (1), a blocking cover (2), a pressure reducing valve sleeve (7) and a pressure reducing valve right end cover (17) which are sequentially and hermetically embedded in a valve body (3), a pressure reducing valve sleeve oil inlet (27) communicated with an oil inlet (24) and a pressure reducing valve sleeve oil outlet (29) communicated with an oil conveying channel (25) are formed in the pressure reducing valve sleeve (7), a pressure reducing valve core (20) is arranged in the pressure reducing valve sleeve (7) in a sliding fit mode, a first pressure reducing valve core bulge and a second pressure reducing valve core bulge are arranged on the outer side wall of the pressure reducing valve core (20), a first annular groove is formed between the first pressure reducing valve core bulge and the second pressure reducing valve core bulge, and an oil storage cavity is formed between the first annular groove and the inner wall of the pressure reducing valve sleeve (7); and a buffer component is arranged at the right end of the pressure reducing valve core (20).

3. The proportional flow valve of claim 2, wherein: the buffer assembly comprises supports (10) which are respectively and fixedly arranged at the right end of the pressure reducing valve core (20) and the left end of the pressure reducing valve right end cover (17), and a pressure reducing valve outer spring (11) and a pressure reducing valve inner spring (15) are arranged between the two supports (10).

4. The proportional flow valve of claim 2, wherein: the side wall of the pressure reducing valve core (20) is provided with a pressure reducing valve core oil inlet (28) communicated with the oil storage cavity, the middle part of the pressure reducing valve core (20) is provided with a pressure reducing valve core oil conveying channel communicated with the pressure reducing valve core oil inlet (28), the left end of the pressure reducing valve core oil conveying channel is provided with a high-pressure damper (8), and the high-pressure damper (8) is abutted to the blocking cover (2).

5. The proportional flow valve of claim 1, wherein: the throttle valve component comprises a throttle valve sleeve (5) which is arranged in the valve body (3) in a sealing assembly mode, a throttle valve gland (4) which is connected with the left end of the throttle valve sleeve (5) and arranged in the valve body and a throttle valve left end cover (30) which is arranged at the left end of the throttle valve gland (4); a throttle valve core (19) is arranged in the throttle valve sleeve (5), and a throttle valve sleeve oil inlet (31) communicated with the oil delivery channel (25) and a throttle valve sleeve oil outlet communicated with the oil outlet (26) are formed in the throttle valve sleeve (5); a first annular bulge of the throttle valve core and a second annular bulge of the throttle valve core are integrally arranged on the side wall of the throttle valve core (19), and a second annular groove is formed between the first annular bulge of the throttle valve core and the second annular bulge of the throttle valve core; a spring cavity is arranged between the throttling valve core (19) and the throttling valve gland (4), and a throttling valve spring (6) connected with the throttling valve core (19) is arranged in the spring cavity.

6. The proportional flow valve of claim 5, wherein: the stepping type actuating mechanism comprises a motor mounting end cover (33) which is arranged inside the valve body in a sealing mode and located at the right end of the throttle valve core (19), the right end of the motor mounting end cover (33) extends out of the valve body and is provided with a stepping motor (18) in a positioning mode, an output shaft end of the stepping motor (18) is fixedly connected with a transmission lead screw (13), the transmission lead screw (13) is provided with a transmission nut (12) in a threaded assembling mode, the transmission nut (12) is fixedly arranged at the left end of the motor mounting end cover (33), and the left end of the transmission lead screw (13) is abutted to the right end of the throttle valve core (19).

7. The proportional flow valve of claim 6, wherein: an oil drainage cavity (34) is formed between the throttle valve sleeve (5) and the transmission nut (12), an oil drainage channel (35) with one end communicated with the oil drainage cavity (34) and the other end communicated with the spring cavity is formed inside the throttle valve core (19), and an oil drainage port (36) communicated with the spring cavity is formed in the valve body (3).