CN217761502U

CN217761502U - Proportional valve

Info

Publication number: CN217761502U
Application number: CN202220839882.0U
Authority: CN
Inventors: 高成国; 赵晓燕; 茅问宇; 温亚非
Original assignee: Eaton Fluid Power Shanghai Co Ltd
Current assignee: Eaton Fluid Power Shanghai Co Ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-11-08
Anticipated expiration: 2032-04-07
Also published as: WO2023193594A1

Abstract

The present disclosure relates to a proportional valve, comprising: a valve core; an adjustment mechanism; and a first manipulation handle connected to the adjustment mechanism that moves the valve cartridge as the first manipulation handle is operated. In this way, the operator can realize manual operation proportional valve, need not to rely on other instruments, and it is comparatively convenient to operate. In addition, through first control handle, operating personnel can adjust the position of case comparatively accurately to can realize manually, control the fluid proportionally.

Description

Proportional valve

Technical Field

The disclosure relates to the technical field of fluid control, in particular to a proportional valve.

Background

With the development of the technology, the requirements of fluid systems (such as hydraulic systems or pneumatic systems) on the accuracy of fluid control are higher and higher. A proportional valve is a fluid control device that is capable of proportionally controlling the pressure, flow path, or direction of a fluid. The proportional valve has the advantages of high control precision, relatively low price and the like, and is widely applied to various fluid systems.

Generally, a proportional valve includes an actuation mechanism and a spool, the actuation mechanism being capable of proportionally moving the spool to achieve proportional control of fluid. Taking a proportional solenoid valve as an example, the actuating mechanism of the proportional solenoid valve includes a proportional electromagnet, which can convert an input current signal into mechanical signals such as force and displacement, and output the signals, thereby accurately controlling the position of the valve core.

Sometimes, it may happen that the valve spool cannot be moved by the actuating mechanism. For example, in a proportional solenoid valve, the spool cannot be moved by the proportional solenoid when de-energized. In this case, it is generally difficult to move the valve body.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present disclosure provides a proportional valve that can be manually operated.

The present disclosure provides a proportional valve comprising: a valve core; an adjustment mechanism; and a first manipulation handle connected to the adjustment mechanism, wherein the adjustment mechanism moves the valve cartridge as the first manipulation handle is operated.

In this way, the operator can realize manual operation proportional valve, need not to rely on other instruments, and it is comparatively convenient to operate. In addition, through the first control handle, an operator can control the position of the valve core accurately, so that the fluid can be controlled manually and proportionally.

In one possible implementation, the adjustment mechanism includes a pushing member located on one axial side of the valve element, wherein the pushing member moves in the axial direction of the valve element to move the valve element along with the first manipulation handle being operated.

In this way, the operator can adjust the position of the valve core by operating the first operating handle to cause the pushing member to move in the axial direction of the valve core.

In one possible implementation, the adjustment mechanism further includes: a revolving body; a pivot shaft which is connected with the first control handle in a non-rotatable manner and is connected with the revolving body in a non-rotatable manner, wherein the pivot shaft extends in a non-parallel manner with the axial direction of the valve core; and the revolving body seat is connected with the pushing piece and is provided with a groove, the revolving body is provided with an actuating end part extending into the groove, and the revolving body and the first operating handle rotate together around the pivot along with the rotation of the first operating handle, so that the revolving body seat moves along the axial direction of the valve core under the action of the actuating end part.

When the operator rotates the first control handle, the revolving body can rotate around the pivot along with the handle. Since the pivot shaft extends non-parallel to the axial direction of the valve element, the actuating end portion thereof has a displacement component in the axial direction of the valve element 23 when the rotation body rotates about the pivot shaft. Thus, as the revolving body rotates, the actuating end part of the revolving body drives the revolving body seat to move along the axial direction of the valve core by applying force to the inner wall of the groove, thereby driving the pushing piece to move along the axial direction of the valve core.

In one possible implementation, the actuating end has a spherical surface, the slot comprises, in succession, in the direction from its bottom to its top, a first segment and a second segment which are contiguous, the second segment of the slot being progressively flared away from the first segment of the slot in which the actuating end is located.

Because the second section of the groove gradually expands outwards as the second section is far away from the first section, the revolving body has a larger rotating range relative to the revolving body seat when rotating, so that the moving range of the revolving body seat under the action of the actuating end part of the revolving body can be increased. Since the actuating end has a spherical surface, the inner diameter of the first section of the groove can be set to a size closer to that of the actuating end, and in this way, the swivel base can be prevented from rocking relative to the swivel while ensuring a large rotation range of the actuating end in the first section of the groove. In addition, because the actuating end part is provided with the spherical surface, when the revolving body rotates, the actuating end part is more smoothly and continuously contacted with the groove, so that the revolving seat can move more smoothly and continuously, and the position of the valve core can be more smoothly and continuously adjusted.

In one possible implementation, the proportional valve further includes a housing provided with a support hole, and the pivot shaft has one end connected to the first manipulation handle and the other end penetrating through the support hole and connected to the rotation body, wherein the pivot shaft is rotatably supported by an inner wall of the support hole.

In this way, when the operator rotates the first manipulation handle, the rotator can pivot along with the first manipulation handle.

In one possible implementation, the adjusting mechanism further includes a connecting member, the rotation body has a first connecting hole and a second connecting hole which are intersected, the pivot has a third connecting hole, the pivot extends into the first connecting hole, and the connecting member passes through the second connecting hole and extends into the third connecting hole.

Thus, the pivot and the revolving body can be connected in a non-rotatable way.

In one possible implementation, the proportional valve further comprises a reset device that maintains the push member in the initial position when the manipulation handle is not operated.

Therefore, after an operator releases the control handle, the pushing piece can be restored to the preset initial position, and the implementation mode can facilitate the use of the operator.

In one possible implementation, the pushing member has a shoulder, the resetting device includes a spring, the spring is sleeved on the pushing member and located on one side of the shoulder facing the valve core, one end of the spring abuts against the shoulder, and the other end of the spring is relatively fixed in the axial direction of the valve core.

In this way, the pusher member can be reset to the initial position after the operator releases the first operating handle. The realization mode has simple structure and convenient operation.

In one possible implementation, the proportional valve further comprises an armature located between the valve core and the pushing member and capable of moving in the axial direction of the valve core under the action of electromagnetic force, wherein when the pushing member is located at the initial position, the pushing member does not interfere with the moving range of the armature.

In this way, it is avoided that the pusher interferes with the movement of the armature during normal operation.

In one possible implementation, the armature has a first limit position and a second limit position opposite to each other in the axial direction of the valve core, the first limit position is far away from the pushing member compared with the second limit position, and when the armature is located at the second limit position and the pushing member is located at the initial position, a space exists between the armature and the pushing member.

Due to the spacing, there is a free travel between the push element and the armature, and correspondingly also a free travel of the first control handle. The first control handle is required to be operated by an operator to move the valve core beyond the idle stroke, so that misoperation of the operator can be avoided to a certain extent.

In one possible embodiment, the actuating handle is detachably connected to the adjusting mechanism.

Like this, when need not carry out manual operation, operating personnel can dismantle first control handle from the proportional valve to reduce the space that the proportional valve was occupied and further avoid the maloperation.

In one possible implementation, the spool moves to a first side of its own axial direction along with the first manipulation handle being operated, and the proportional valve further includes a second manipulation handle along with the spool moves to a second side of its own axial direction opposite to the first side along with the second manipulation handle being operated.

Therefore, when the proportional valve needs to be manually operated, an operator can move the valve core in two opposite directions through the first control handle and the second control handle, and then the proportional valve is quickly, accurately and reliably operated.

In one possible implementation, the proportional valve is implemented as a proportional solenoid directional valve.

Drawings

In order to more clearly illustrate the technical solution of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below.

It is appreciated that the following drawings depict only certain embodiments of the application and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.

It should be understood that the same or similar reference numerals are used throughout the figures to indicate the same or similar elements (components or constituent parts).

It should be understood that the drawings are merely schematic and that the sizes and proportions of elements (components or parts) in the drawings are not necessarily precise.

Fig. 1 is a schematic view of a structure of a proportional valve according to the related art.

FIG. 2 is a schematic structural diagram of a proportional valve according to an embodiment of the present disclosure.

FIG. 3 is a partial cross-sectional view of the proportional valve shown in FIG. 2.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 3.

Fig. 5a to 5c exemplarily show relative positional relationships of a pusher and an armature of a proportional valve according to an embodiment of the present disclosure in different cases.

FIG. 6 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure.

FIG. 7 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure.

FIG. 8 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure.

Detailed Description

For ease of understanding, the proportional valve provided in the related art is illustrated below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a proportional valve 10 according to the related art, which shows a part of components of the proportional valve 10. Referring to fig. 1, the proportional valve 10 includes a push rod 11, an armature 12, and an end cap 13, the end cap 13 being provided with a hole 13a. The proportional valve 10 also includes a valve spool, which is not shown in FIG. 1. The armature 12 is located on one axial side of the valve spool and the tappet 11 is located on the side of the armature 12 facing away from the valve spool.

In normal operation, the armature 12 moves along the axial direction of the valve core under the action of electromagnetic force, so that the valve core moves, and the position of the valve core is controlled. When the valve plug cannot be driven by the magnetic force, for example, when power is cut off, an operator can push the push rod 11 by inserting a tool (for example, a screwdriver) into the end cover hole 13a, and then sequentially push the armature 12 and the valve plug, so as to manually operate the proportional valve 10. This implementation is not only inconvenient to operate, but also does not allow the position of the spool to be precisely controlled.

As an object of the present disclosure, in order to solve the above-mentioned problems occurring in the related art, the present disclosure provides a proportional valve. The proportional valve provided by the present disclosure is illustrated in the following with reference to the accompanying drawings. It is to be understood that the implementations of the present disclosure are numerous and should not be construed as limited to the embodiments set forth herein, which are for the purpose of providing a more thorough and complete understanding of the present disclosure.

FIG. 2 is a schematic diagram of a configuration of a proportional valve 20 according to an embodiment of the present disclosure.

In some non-limiting embodiments, the proportional valve 20 may be a proportional solenoid valve. In other more specific embodiments, the proportional valve may be a proportional solenoid directional valve. It should be understood that the proportional valve provided by the present disclosure is not limited to a proportional solenoid valve, and in other embodiments, the proportional valve provided by the present disclosure may be other types of proportional valves.

Referring to fig. 2, the proportional valve 20 includes a first manipulation handle 21a, and the proportional valve 20 further includes a valve core and an adjustment mechanism, which are not shown in fig. 2. The first manipulation handle 21a is configured to be held by an operator. As an exemplary implementation, the operator may operate the first manipulation handle 21a by turning it, as shown in fig. 2.

The adjustment mechanism is capable of moving the valve cartridge as the first manipulation handle 21a is operated. That is, the operator can control the adjusting mechanism to adjust the position of the valve core by operating the first manipulating handle 21a, so as to realize the manual operation of the proportional valve 20. In some embodiments, the spool of the proportional valve 20 is in different positions when the first manipulation handle 21a is in different positions.

In this way, the operator can manually operate the proportional valve 20 without the aid of other tools, and the operation is convenient. In addition, through the first control handle 21a, the operator can control the position of the valve core more precisely, so that the fluid can be controlled manually and proportionally.

The implementation manner of the adjusting mechanism is various, and the disclosure does not specifically limit this, and the implementation manner of the adjusting mechanism is described below by way of example.

Fig. 3 is a cross-sectional view of the proportional valve 20. Referring to fig. 3, the adjustment mechanism 22 of the proportional valve 20 includes a push member 221. In one example, the pusher 221 can be in the shape of an elongated rod. The pushing member 221 is located on one axial side of the spool 23 of the proportional valve 20, and the pushing member 221 is movable in the axial direction of the spool 23. In one example, the axial direction of the spool 23 may refer to a direction along which the spool 23 is movable in the proportional valve 22.

Referring to fig. 2 and 3, the pushing member 221 is capable of moving the spool 23 in the axial direction of the spool 23 along with the first manipulation handle 21a being operated. That is, in this way, the operator can adjust the position of the valve element 23 by operating the first manipulation handle 21a to cause the push member 22 to move in the axial direction of the valve element 23.

In some embodiments, referring again to fig. 3, the proportional valve 20 further includes an armature 24 (or solenoid core tube), the armature 24 being located between the spool 23 and the pusher member 221. The armature 24 is movable in the axial direction of the spool 23 by the electromagnetic force.

In normal operation, the position of the spool 23 may be adjusted by the armature 24. When the proportional valve needs to be manually operated, an operator can move the pushing member 22 through the first control handle 21a, so that the pushing member 22 pushes the armature 24, and then the armature 24 pushes the valve core 23, thereby realizing the adjustment of the position of the valve core 23.

It should be appreciated that although in this embodiment the pusher 221 needs to move the valve spool 23 indirectly by pushing the armature 24, in other embodiments the pusher 221 may move the valve spool 23 directly, e.g., the pusher 221 may be in direct contact with the valve spool 23.

There are various ways to realize the movement of the pushing member 221 in the axial direction of the spool 23 along with the operation of the first manipulation handle 21a, and this disclosure is not particularly limited thereto. In the following, an exemplary implementation is given.

Fig. 4 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.

Referring to fig. 3 and 4, the adjustment mechanism 22 further includes a rotator 222, a pivot 223, and a rotator base 224. The pivot 223 is connected to the first manipulation handle 21a in a non-rotatable manner, and the pivot 223 is connected to the rotation body 222 in a non-rotatable manner, so that the rotation body 222 can rotate around the pivot 223 along with the first manipulation handle 21 a. The pivot 223 extends non-parallel to the axial direction of the spool 23. In one example, the pivot 223 may extend perpendicular to the axial direction of the spool 23. The rotator base 224 is connected with the pushing member 221, and the rotator base 224 is provided with a groove 2241. One end (for convenience of description, hereinafter referred to as an actuating end) 222a of the rotator 222 extends into the groove 2241.

When the operator rotates the first manipulation handle 21a, the rotator 222 can rotate around the pivot 223 along with the handle 21. Since the pivot 223 extends non-parallel to the axial direction of the valve element 23, the actuating end 222a thereof has a displacement component in the axial direction of the valve element 23 when the rotator 222 rotates about the pivot 223. Thus, as the rotator 222 rotates, the actuating end 222a thereof drives the rotator seat 224 to move in the axial direction of the valve element 23 by applying a force to the inner wall of the groove 2241, thereby driving the pushing member 221 to move in the axial direction of the valve element 23.

In some non-limiting examples, referring again to fig. 3, slot 2241 includes, in order in a direction from its bottom to its top, first and

second segments

2241a and 2241b that meet, with second segment 2241b gradually flaring (increasing in inside diameter) away from first segment 2241 a. Actuating end 222a of rotator 222 has a spherical surface and actuating end 222a is located within first segment 2241a of slot 2241.

Since the second section 2241b of the groove 2241 is gradually widened as it goes away from the first section 2241a, the rotator 222 has a larger rotation range with respect to the rotator base 224 when rotated, so that the moving range of the rotator base 224 under the action of the actuating end 222a of the rotator 222 can be increased. Since the actuating end 222a has a spherical surface, the inner diameter of the first section 2241a of the slot 2241 may be set to a size closer to the actuating end 222a (e.g., the inner diameter of the first section 2241a of the slot 2241 may be close to the diameter of the spherical surface of the actuating end 222 a), in this way, it is possible to avoid the swivel body seat 224 from wobbling relative to the swivel body 222 while ensuring a large range of rotation of the actuating end 222a within the first section 2241a of the slot 2241. In addition, since the actuating end 222a has a spherical surface, when the rotator 222 rotates, the actuating end 222a contacts the groove 2241 more smoothly and continuously, so that the movement of the rotary seat 224 can be more smoothly and continuously, and the position of the valve element 23 can be adjusted more smoothly and continuously.

As an exemplary implementation, as shown in fig. 4, the proportional valve 22 further includes a housing 25, and the housing 25 is provided with a support hole 251. The first manipulation handle 21a is located outside the housing 25, and the rotator 222 is located inside the housing 25. The pivot 223 and the first manipulation handle 21a are non-rotatably connected to each other, and the pivot 223 passes through the support hole 251 and is non-rotatably connected to the rotation body 222. The pivot 223 is rotatably supported by the inner wall of the support hole 251. That is, the support hole 251 may function as a sliding bearing. In this way, when the operator rotates the first manipulation handle 21a, the rotator 222 can rotate around the pivot 223 along with the first manipulation handle 21 a.

There are various ways to realize the non-rotatable connection of pivot 223 and rotator 222, and this disclosure is not limited thereto. As an example, referring back to fig. 3 and 4, the adjustment mechanism 22 further includes a connecting member 225 (e.g., a screw), the rotator 222 having a first connecting hole 222b and a second connecting hole 222c intersecting (or penetrating each other), and the pivot having a third connecting hole 223a. Pivot 223 extends into first coupling hole 222b of rotator 222, and link 225 passes through second coupling hole 222c of rotator 222 and extends into third coupling hole 223a of pivot 223. In this way, the pivot 223 and the rotator 222 can be connected to each other so as not to rotate relative to each other.

It is contemplated that the proportional valve still needs to be restored to being driven by the actuating mechanism after manual operation is completed. In view of this, in certain embodiments, the present disclosure provides that the proportional valve may further include a reset device configured to maintain the pusher in the initial position when the manipulation handle is not operated. Therefore, after an operator releases the control handle, the pushing piece can be restored to the preset initial position, and the implementation mode can facilitate the use of the operator.

The reset device can be implemented in various ways, and the disclosure is not limited thereto. An exemplary implementation is given below in conjunction with the figures.

Referring again to fig. 3, in this embodiment, the return means is realized as a spring 26, the spring 26 being sleeved on the push member 221. The pusher 221 has a shoulder 221a, the spring 26 is located on a side of the shoulder 221a toward the spool 23, one end of the spring 26 abuts against the shoulder 221a, and the other end of the spring 26 is relatively fixed in the axial direction of the spool 23.

As shown in fig. 2 and 3, when the operator rotates the first manipulation handle 21a in the direction of the arrow in fig. 2, the actuating end 222a of the rotation body 222 has a displacement component in the direction toward the valve core 23, and the pushing member 221 causes the valve core 23 to move away from the pushing member 221, at which time the spring 26 is compressed.

When the operator releases the first control handle 21a, the pushing member 221 moves in a direction away from the valve element 23 by the elastic restoring force of the spring 26, and returns to the initial position. At the same time, the first manipulation handle 21a is also restored to its original position, correspondingly.

In this way, the pusher member 221 can be reset to the initial position after the operator releases the first manipulation handle 21 a. The realization mode has simple structure and convenient operation.

In one example, referring again to fig. 3, the proportional valve 20 further comprises a stopper 27, the stopper 27 comprising a body portion 271 and a flange portion 272, the body portion 271 being provided with a hole 273 adapted for the end of the pusher member 221 to pass through. The stopper 27 is relatively fixed in position in the axial direction of the spool 23, and an end of the spring 26 facing away from the shoulder 221a of the pusher 221 is fitted over the body portion 271 of the stopper 27 and abuts against the flange portion 272. In this example, the flange portion 272 of the stop 27 can cause the end of the spring 26 facing away from the pusher 221 to be relatively stationary, such that when the pusher 221 moves toward the valve spool 23, the spring 26 is compressed, and at the same time, the pusher 221 can pass through the hole 273 to cause the valve spool 23 to move.

In embodiments in which the proportional valve is implemented as a proportional solenoid valve, it typically has an armature as the actuating member. In normal operation, the armature can move along the axial direction of the valve core. In some embodiments, the relative positions of the pusher and armature may be configured to: when the push member is in the initial position, the push member does not interfere with the range of motion of the armature. Thus, it is possible to prevent the pushing member from interfering with the movement of the armature during normal operation.

Fig. 5a to 5c show the relative positional relationship of the pushing member 221 and the armature 24 in different cases. This is described in detail below in conjunction with fig. 5a to 5 c. It should be noted that the armature 24 has a first limit position and a second limit position opposite to each other in the axial direction of the spool 23, and the first limit position is farther from the push member 221 than the second limit position.

In fig. 5a, the first operating handle 21a is not rotated, the push element 221 is in the initial position and the armature 24 is in the first extreme position. In fig. 5b, the first operating handle 21a is not rotated, the push member 221 is in the initial position and the armature 24 is in the second extreme position. In fig. 5c, the push member 221 is moved away from the initial position as the first manipulation handle 21a is rotated.

As shown in fig. 5a to 5b, when the first manipulation handle 21a is not operated, even if the armature 24 moves to the second limit position, a space W is still present between the armature 24 and the pushing member 221, which ensures that the pushing member 221 does not interfere with the moving range of the armature 24 in normal operation. When manual operation is required, as shown in fig. 5c, an operator can operate the first control handle 21a to move the pushing member 221 toward the armature 24, so as to contact the armature 24 and push the armature 24.

It should be understood that although in this embodiment, when the armature 24 is in the second extreme position and the pushing member 221 is in the initial position, there is a space W between the armature 24 and the pushing member 221. However, in other embodiments, when the armature 24 is in the second limit position and the pushing member 221 is in the initial position, the armature 24 and the pushing member 221 may just touch, which still achieves that the pushing member 221 does not interfere with the range of movement of the armature 24 when the pushing member 221 is in the initial position.

The presence of the gap W between the armature 24 and the push member 221, as compared to just touching, can avoid malfunction to some extent. In particular, due to the spacing W, there is an idle stroke between the pusher 221 and the armature 24, and correspondingly also the first control handle 21 a. The operator needs to operate the first manipulation handle 21a to move the valve element 23 beyond the idle stroke, so that the misoperation of the operator can be avoided to a certain extent.

Referring back to fig. 2 and 3, in some embodiments, the first manipulation handle 21a may be configured to be detachably coupled with the adjustment mechanism 22. In this way, when manual operation is not required, the operator can detach the first manipulation handle 21a from the proportional valve 20, thereby reducing the space occupied by the proportional valve 20 and further avoiding erroneous operation.

Referring again to fig. 2 and 3, in some embodiments, proportional valve 20 may further include a second manipulation handle 21b. The operator can adjust the position of the spool 23 by means of the second manipulation handle 21b. More specifically, the spool 23 may move toward a first side of its own axial direction as the first manipulation handle 21a is operated, and the spool 23 may move toward a second side of its own axial direction opposite to the first side as the second manipulation handle 21b is operated. In this way, when the proportional valve 20 needs to be manually operated, an operator can move the valve core 23 in two opposite directions by the first manipulation handle 21a and the second manipulation handle 21b, so that the proportional valve 20 can be quickly, accurately and reliably operated.

It should be understood that there are various ways to achieve the movement of the valve core 23 by operating the second manipulation handle 21b, and the present disclosure is not particularly limited thereto. In some embodiments, the proportional valve 20 may further include another set of adjustment mechanisms that are the same as or similar to the adjustment mechanism 22, and the second joystick 21b may be engaged therewith to effect movement of the valve cartridge 23 by operation of the second joystick 21b.

The above description is only a specific embodiment of the present application, but the scope of the present application is not limited thereto. Potential alternative implementations of the present disclosure are illustrated below in conjunction with fig. 6-8.

FIG. 6 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure. Referring to fig. 6, in this embodiment, the reset device includes a first magnetic member 281 and a second magnetic member 282, and the first magnetic member 281 is fixed to the rotator 222. The second magnetic member 282 is disposed at a distance from and fixed in position relative to the first magnetic member, and the first magnetic member 281 and the second magnetic member 282 are disposed with like poles facing each other. When the first manipulation handle 21a is manipulated, the rotator 222 moves in the direction of the arrow in fig. 6, so that the first magnetic member 281 approaches the second magnetic member 282. After the operator releases his/her hand, the magnetic repulsion between the first magnetic member 281 and the second magnetic member 282 drives the rotator 222 to reset, and further drives the pushing member 221 to reset.

FIG. 7 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure. Referring to fig. 7, in this embodiment, the adjustment mechanism includes a cam 29 in addition to a pusher member 221. When the first manipulation handle 21a is rotated, the cam 29 drives the pushing member 221 to move in the axial direction of the spool 23.

FIG. 8 is a schematic structural diagram of a portion of components of a proportional valve according to another embodiment of the present disclosure. Referring to fig. 8, in this embodiment, the adjustment mechanism includes the actuating block 30 and the elastic member 31 in addition to the pushing member 221. The actuating block 30 has a mating slope, and the end of the pushing member 221 facing the actuating block 30 also has a mating slope. When the operator presses the first manipulation handle 21a, the mating inclined surface of the actuation block 30 interacts with the mating inclined surface of the push member 221, causing the push member 221 to move in the axial direction of the valve cartridge 23. When the operator releases his hand, the elastic member 31 located below the actuating block 30 pushes the first manipulation handle 21a to be reset.

It is understood that, as used herein, the term "including" and variations thereof are intended to be open-ended, i.e., "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements (e.g., first and second joysticks), these elements are not limited by these terms, which are only used to distinguish one element from another.

It should be noted that, in the foregoing embodiments, various specific technical features (elements) described in the above embodiments can be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.

It should be understood that any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A proportional valve, comprising:

a valve core;

an adjustment mechanism; and

a first manipulation handle connected to the adjustment mechanism, wherein the adjustment mechanism moves the valve cartridge as the first manipulation handle is operated.

2. The proportional valve of claim 1, wherein the adjustment mechanism includes a pusher member located on one axial side of the valve spool, wherein the pusher member moves the valve spool in an axial direction of the valve spool as the first manipulation handle is operated.

3. The proportioning valve of claim 2 wherein said adjustment mechanism further comprises:

a revolving body;

a pivot shaft non-rotatably connected to the first manipulation handle and non-rotatably connected to the rotation body, wherein the pivot shaft extends in a direction not parallel to the axial direction of the valve element; and

and the revolving body seat is connected with the pushing piece and is provided with a groove, the revolving body is provided with an actuating end part extending into the groove, and the revolving body and the first operating handle rotate around the pivot along with the rotation of the first operating handle, so that the revolving body seat moves along the axial direction of the valve core under the action of the actuating end part.

4. The proportioning valve of claim 3 wherein said actuator end has a bulbous surface, said slot includes first and second contiguous segments in sequence in a direction from a bottom of said slot to a top of said slot, said second segment of said slot gradually flaring away from said first segment of said slot, said actuator end being located within said first segment of said slot.

5. The proportioning valve of claim 3 further comprising a housing having a support hole, said pivot shaft having one end connected to said first manipulating handle and the other end passing through said support hole and connected to said rotator, wherein said pivot shaft is rotatably supported by an inner wall of said support hole.

6. The proportioning valve of claim 3 wherein said adjustment mechanism further includes a linkage, said body having first and second intersecting linkage bores, said pivot having a third linkage bore, said pivot extending into said first linkage bore, said linkage extending through said second linkage bore and into said third linkage bore.

7. The proportioning valve of claim 2 further comprising a reset device that holds the pusher in an initial position when the operating handle is not operated.

8. The proportioning valve of claim 7 wherein said push member has a shoulder, said return means includes a spring, said spring is sleeved on said push member on a side of said shoulder facing said spool, and one end of said spring abuts against said shoulder and the other end is relatively fixed in the axial direction of said spool.

9. The proportional valve of claim 2, further comprising an armature located between the valve spool and the pusher and movable under electromagnetic force in an axial direction of the valve spool, wherein the pusher does not interfere with a range of movement of the armature when the pusher is in an initial position.

10. The proportional valve of claim 9, wherein the armature has first and second opposing extreme positions in an axial direction of the spool, the first extreme position being distal from the urging member as compared to the second extreme position, wherein a space exists between the armature and the urging member when the armature is in the second extreme position and the urging member is in an initial position.

11. The proportioning valve of any one of claims 1 to 10 wherein said steering handle is removably connected to said adjustment mechanism.

12. The proportional valve of any of claims 1-10, wherein the spool moves to a first side of its own axial direction as the first manipulation handle is operated, the proportional valve further comprising a second manipulation handle, wherein the spool moves to a second side of its own axial direction opposite the first side as the second manipulation handle is operated.

13. Proportional valve according to any of claims 1 to 10, characterized in that it is realized as a proportional solenoid directional valve.