WO2023193594A1

WO2023193594A1 - Proportional valve

Info

Publication number: WO2023193594A1
Application number: PCT/CN2023/082492
Authority: WO
Inventors: 高成国; 赵晓燕; 茅问宇; 温亚非
Original assignee: 丹佛斯动力系统（上海）有限公司
Priority date: 2022-04-07
Filing date: 2023-03-20
Publication date: 2023-10-12
Also published as: CN217761502U

Abstract

The present invention relates to a proportional valve, comprising: a valve core; an adjustment mechanism; and a first control handle, the first control handle being connected to the adjustment mechanism, and the adjustment mechanism moving the valve core along with the operation of the first control handle. In this way, an operator can manually operate the proportional valve, other tools are not needed, and operation is convenient. In addition, the operator can accurately adjust the position of the valve core by means of the first control handle, such that a fluid can be manually and proportionally controlled.

Description

Proportional valve

Technical field

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

Background technique

With the development of technology, fluid systems (such as hydraulic systems or pneumatic systems) have increasingly higher requirements for fluid control accuracy. A proportional valve is a fluid control device that can proportionally control the pressure, flow path or direction of a fluid. Due to its advantages of high control accuracy and relatively low price, proportional valves are widely used in various fluid systems.

Generally speaking, a proportional valve includes an actuating mechanism and a valve core. The actuating mechanism can move the valve core proportionally, thereby achieving proportional control of the fluid. Taking a proportional solenoid valve as an example, its actuating mechanism includes a proportional electromagnet. The proportional electromagnet can convert the input current signal into mechanical signal output such as force and displacement, thereby accurately controlling the position of the valve core.

Sometimes, there will be situations where the valve core cannot be moved by the actuating mechanism. For example, for a proportional solenoid valve, the valve core cannot be moved by the proportional solenoid when the power is off. In this case, if the valve core still needs to be moved, it is usually difficult to achieve.

Contents of the invention

In view of this, the present disclosure provides a proportional valve capable of manual operation.

The proportional valve provided by the present disclosure includes: a valve core; an adjustment mechanism; and a first control handle connected to the adjustment mechanism, wherein the adjustment mechanism moves the valve core as the first control handle is operated.

In this way, the operator can manually operate the proportional valve without the need for other tools, making the operation more convenient. In addition, through the first control handle, the operator can control the position of the valve core relatively accurately, thereby enabling manual and proportional control of the fluid.

In a possible implementation, the adjustment mechanism includes a pusher located on an axial side of the valve core, wherein the pusher moves along the axial direction of the valve core as the first control handle is operated, thereby moving the valve core.

In this way, the operator can cause the pushing member to move along the axial direction of the valve core by operating the first control handle, thereby adjusting the position of the valve core.

In a possible implementation, the adjustment mechanism further includes: a rotary body; a pivot shaft, which is non-rotatably connected to the first control handle and to the rotary body, wherein the pivot shaft is not parallel to the axial direction of the valve core. and the rotary body base is connected to the pusher and is provided with a slot, the rotary body has an actuating end extending into the slot, wherein as the first control handle is rotated, the rotary body and the first control handle revolve around the pivot axis Rotate so that the rotary body seat moves along the axial direction of the valve core under the action of the actuating end.

When the operator rotates the first control handle, the rotary body can rotate around the pivot axis along with the handle. Since the pivot axis extends non-parallel to the axial direction of the valve core, when the rotary body rotates around the pivot axis, its actuating end has a displacement component in the axial direction of the valve core 23 . In this way, as the rotary body rotates, its actuating end drives the rotary body seat to move in the axial direction of the valve core by exerting force on the inner wall of the groove, thereby driving the pushing member to move in the axial direction of the valve core.

In a possible implementation, the actuating end has a spherical surface, the groove sequentially includes a first section and a second section that are connected in a direction from its bottom to its top, and the second section of the groove moves away from the groove. The first section gradually expands outward, and the actuating end is located in the first section of the groove.

Since the second section of the groove gradually expands as it moves away from the first section, the rotary body has a larger rotation range relative to the rotary body base when rotating, thereby increasing the actuating end of the rotary body at the rotary body base. range of movement. Since the actuating end has a spherical surface, the inner diameter of the first section of the groove can be set closer to the size of the actuating end. In this way, it is possible to ensure that the actuating end has a larger diameter within the first section of the groove. While increasing the rotation range, the rotary body base is prevented from shaking relative to the rotary body. In addition, since the actuating end has a spherical surface, when the rotary body is rotating, the contact between the actuating end and the groove is smoother and more continuous, which can make the movement of the rotary seat smoother and more continuous, thus ensuring the position of the valve core. Adjustments are smoother and more continuous.

In a possible implementation, the proportional valve further includes a housing. The housing is provided with a support hole. One end of the pivot shaft is connected to the first control handle, and the other end passes through the support hole and is connected to the rotary body. The pivot shaft is connected to the rotary body through the support hole. The inner wall is rotatably supported.

In this way, when the operator rotates the first control handle, the rotary body can pivot along with the first control handle.

In a possible implementation, the adjustment mechanism further includes a connecting piece, the rotary body has an intersecting first connecting hole and a second connecting hole, the pivot shaft has a third connecting hole, the pivot shaft extends into the first connecting hole, and the connecting piece Pass through the second connection hole and extend into the third connection hole.

In this way, the pivot axis and the rotary body can be connected to each other in a non-rotatable manner.

In a possible implementation, the proportional valve further includes a reset device that keeps the pushing member in the initial position when the control handle is not operated.

In this way, after the operator releases the control handle, the pushing member can return to the preset initial position. This implementation method can be convenient for the operator to use.

In a possible implementation, the pusher has a shoulder, and the reset device includes a spring. The spring is sleeved on the pusher and is located on a side of the shoulder facing the valve core. One end of the spring abuts the shoulder, and the other end is on The axial direction of the valve core is relatively fixed.

In this way, after the operator releases the first control handle, the pushing member can be reset to the original position. This implementation method has simple structure and easy operation.

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

In this way, the pushing member can be prevented from interfering with the movement of the armature during normal operation.

In a possible implementation, the armature has a relative first limit position and a second limit position in the axial direction of the valve core. The first limit position is farther away from the pushing member than the second limit position. When the armature is in the second limit position, In the extreme position and the pusher is in the initial position, there is a gap between the armature and the pusher.

Due to the existence of the gap, there is an idle stroke between the pushing member and the armature, and correspondingly there is an idle stroke on the first control handle. The operator needs to operate the first control handle to cross the idle stroke in order to move the valve core, thus preventing the operator from misoperation to a certain extent.

In a possible implementation, the control handle is detachably connected to the adjustment mechanism.

In this way, when manual operation is not required, the operator can detach the first control handle from the proportional valve, thereby reducing the space occupied by the proportional valve and further avoiding misoperation.

In a possible implementation, the valve core moves toward the first axial side of itself as the first control handle is operated, and the proportional valve further includes a second control handle, and the valve core moves toward the second control handle as the second control handle is operated. Its own axis moves towards a second side opposite to the first side.

In this way, when the proportional valve needs to be manually operated, the operator can move the valve core in two opposite directions through the first control handle and the second control handle, thereby operating the proportional valve quickly, accurately and reliably.

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

Brief description of the drawings

In order to explain the technical solution of the present disclosure more clearly, the drawings required to be used in the embodiments will be briefly introduced below.

It should be understood that the following drawings only show certain embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without exerting creative efforts, they can also Other relevant drawings are obtained based on these drawings.

It will be understood that the same or similar reference numbers are used in the drawings to represent the same or similar elements (components or components).

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

Figure 1 is a schematic structural diagram of a proportional valve according to the related art.

Figure 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 is a cross-sectional view taken along line A-A in FIG. 3 .

5a to 5c exemplarily illustrate the relative positional relationship between the pusher and the armature of the proportional valve under different circumstances according to an embodiment of the present disclosure.

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

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

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

Detailed ways

In order to facilitate understanding, the proportional valve provided by the related art will be illustrated below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a proportional valve 10 according to the related art, which shows some components of the proportional valve 10 . Referring to Figure 1, the proportional valve 10 includes a push rod 11, an armature 12 and an end cover 13. The end cover 13 is provided with a hole 13a. The proportional valve 10 also includes a valve core, which is not shown in FIG. 1 . The armature 12 is located on the axial side of the valve core, and the push rod 11 is located on the side of the armature 12 away from the valve core.

During normal operation, the armature 12 moves along the axial direction of the valve core under the action of electromagnetic force, causing the valve core to move, thereby achieving control of the valve core position. When the electromagnetic force cannot be applied to drive the valve core, such as when the power is cut off, the operator can use a tool (such as a screwdriver) to insert the tool into the end cover hole 13a to push the push rod 11, and then push the armature 12 and the valve core in turn. Realize manual operation of proportional valve 10. This implementation is not only inconvenient to operate, but also cannot accurately control the position of the valve core.

As an object of the present disclosure, in order to solve the above-mentioned problems existing in the related art, the present disclosure provides a proportional valve. Below, the proportional valve provided by the present disclosure is illustrated with examples in conjunction with the accompanying drawings. It should be understood that the present disclosure can be implemented in various ways and should not be construed as being limited to the embodiments set forth here. The embodiments set forth here are only for a more thorough and complete understanding of the present disclosure.

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

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

Referring to FIG. 2 , the proportional valve 20 includes a first control handle 21 a. The proportional valve 20 also includes a valve core and an adjustment mechanism. The valve core and the adjustment mechanism are not shown in FIG. 2 . The first control handle 21a is configured to be held and operated by an operator. As an exemplary implementation, as shown in Figure 2, the operator can operate the first control handle 21a by rotating it.

The adjustment mechanism can move the valve core as the first control handle 21a is operated. That is to say, the operator can control the adjusting mechanism to adjust the position of the valve core by operating the first control handle 21a, thereby achieving manual operation of the proportional valve 20. In some embodiments, when the first control handle 21a is located at different positions, the valve core of the proportional valve 20 is located at different positions.

In this way, the operator can manually operate the proportional valve 20 without using other tools, making the operation more convenient. In addition, through the first control handle 21a, the operator can more accurately control the position of the valve core, thereby enabling manual and proportional control of the fluid.

There are many ways to implement the adjustment mechanism, and this disclosure does not specifically limit this. The following describes examples of ways to implement the adjustment mechanism.

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 pushing member 221 . In one example, the pushing member 221 may be in the shape of an elongated rod. The pushing member 221 is located on one axial side of the valve core 23 of the proportional valve 20 , and the pushing member 221 can move along the axial direction of the valve core 23 . In one example, the axial direction of the valve core 23 may refer to the direction along which the valve core 23 can move in the proportional valve 22 .

Referring to FIGS. 2 and 3 , the pushing member 221 can move along the axial direction of the valve core 23 as the first control handle 21 a is operated, thereby moving the valve core 23 . That is to say, in this way, the operator can cause the pushing member 22 to move along the axial direction of the valve core 23 by operating the first control handle 21a, thereby adjusting the position of the valve core 23.

In some embodiments, referring again to FIG. 3 , the proportional valve 20 further includes an armature 24 (also known as an electromagnetic core tube). The armature 24 is located between the valve core 23 and the pushing member 221 . The armature 24 can move along the axial direction of the valve core 23 under the action of electromagnetic force.

During normal operation, the position of the valve core 23 can be adjusted through the armature 24 . When the proportional valve needs to be manually operated, the operator can move the pushing member 22 through the first control handle 21a, and then the pushing member 22 pushes the armature 24, and then the armature 24 pushes the valve core 23, thereby adjusting the position of the valve core 23.

It should be understood that although in this embodiment, the pushing member 221 needs to move the valve core 23 indirectly by pushing the armature 24, in other embodiments, the pushing member 221 can also directly move the valve core 23, for example, the pushing member 221 can move the valve core 23 directly. 221 can be in direct contact with the valve core 23.

The pushing member 221 moves in the axial direction of the valve core 23 as the first control handle 21a is operated. There are many formulas, and this disclosure does not specifically limit them. Below, an exemplary implementation is given.

FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3 .

Referring to FIGS. 3 and 4 , the adjustment mechanism 22 also includes a rotary body 222 , a pivot 223 and a rotary body base 224 . The pivot shaft 223 is connected to the first control handle 21a in a relatively non-rotatable manner, and the pivot shaft 223 is connected to the rotary body 222 in a relatively non-rotatable manner. In this way, the rotary body 222 can rotate around the pivot shaft 223 together with the first control handle 21a. The pivot 223 extends non-parallel to the axial direction of the valve core 23 . In one example, the pivot 223 may extend perpendicularly to the axial direction of the valve core 23 . The rotary body base 224 is connected to the pushing member 221, and the rotary body base 224 is provided with a slot 2241. One end 222a of the rotary body 222 (hereinafter referred to as the actuating end for ease of description) extends into the slot 2241.

When the operator rotates the first control handle 21a, the rotary body 222 can rotate around the pivot axis 223 along with the handle 21. Since the pivot 223 does not extend parallel to the axial direction of the valve core 23 , when the rotary body 222 rotates around the pivot 223 , its actuating end 222 a has a displacement component in the axial direction of the valve core 23 . In this way, as the rotary body 222 rotates, its actuating end 222a drives the rotary body seat 224 to move along the axial direction of the valve core 23 by exerting force on the inner wall of the groove 2241, thereby driving the pushing member 221 along the axial direction of the valve core 23. move.

In some non-limiting examples, referring again to FIG. 3 , the groove 2241 sequentially includes a first section 2241 a and a second section 2241 b that are connected in a direction from its bottom to its top. The second section 2241 b moves away from the first section 2241 . The segment 2241a gradually expands outward (the inner diameter gradually increases). The actuating end 222a of the rotary body 222 has a spherical surface, and the actuating end 222a is located in the first section 2241a of the groove 2241.

Since the second section 2241b of the groove 2241 gradually expands away from the first section 2241a, the rotary body 222 has a larger rotation range relative to the rotary body base 224 when rotating, thereby increasing the rotation range of the rotary body base 224. The range of movement under the action of the actuating end 222a of the body 222. Because the actuating end 222a has a spherical surface, the inner diameter of the first section 2241a of the groove 2241 may be sized closer to the actuating end 222a (e.g., the inner diameter of the first section 2241a of the groove 2241 may be sized closer to the actuating end 222a), in this way, it is possible to prevent the rotary body base 224 from shaking relative to the rotary body 222 while ensuring that the actuating end 222a has a larger rotation range in the first section 2241a of the groove 2241. In addition, since the actuating end 222a has a spherical surface, when the rotary body 222 is rotating, the contact between the actuating end 222a and the groove 2241 is smoother and more continuous, which can make the movement of the rotary base 224 smoother and more continuous. This ensures that the position of the valve core 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 control handle 21a is located outside the housing 25, and the rotating body 222 is located inside the housing 25. The pivot shaft 223 and the first control handle 21a are connected to each other in a non-rotatable manner, and the pivot shaft 223 passes through the support hole 251 and is connected to the rotary body 222 in a non-rotatable manner. The pivot shaft 223 is rotatably supported by the inner wall of the support hole 251 . That is to say, the support hole 251 can function as a sliding bearing. In this way, when the operator rotates the first control handle 21a, the rotary body 222 can rotate around the pivot axis 223 along with the first control handle 21a.

There are many ways to realize the non-rotatable connection between the pivot shaft 223 and the rotary body 222, which is not specifically limited in this disclosure. As an example, referring again to Figures 3 and 4, the adjustment mechanism 22 also includes a connecting piece 225 (such as a screw), and the rotary body 222 has an intersecting (or mutually penetrating) first connection hole 222b and a second connection hole 222c, The pivot shaft has a third connection hole 223a. The pivot shaft 223 extends into the first connecting hole 222b of the rotating body 222, and the connecting piece 225 passes through the second connecting hole 222c of the rotating body 222 and extends into the third connecting hole 223a of the pivot shaft 223. In this way, the pivot 223 and the rotary body 222 can be connected to each other in a non-rotatable manner.

Consider that after manual operation is completed, the proportional valve still needs to return to being driven by the actuating mechanism. In view of this, in some embodiments, the proportional valve provided by the present disclosure may further include a reset device configured to maintain the push member in the initial position when the control handle is not operated. In this way, after the operator releases the control handle, the pushing member can return to the preset initial position. This implementation method can be convenient for the operator to use.

There are many ways to implement the reset device, and this disclosure does not specifically limit them. An exemplary implementation is given below in conjunction with the accompanying drawings.

Referring again to FIG. 3 , in this embodiment, the reset device is implemented as a spring 26 , and the spring 26 is sleeved on the pushing member 221 . The pushing member 221 has a shoulder 221a, and the spring 26 is located on a side of the shoulder 221a facing the valve core 23. One end of the spring 26 abuts the shoulder 221a, and the other end of the spring 26 is relatively fixed in the axial direction of the valve core 23.

As shown in Figures 2 and 3, when the operator rotates the first control handle 21a in the direction of the arrow in Figure 2 When , the actuating end 222a of the rotary 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 in a direction away from the pushing member 221. At this time, the spring 26 is compressed.

When the operator releases the first control handle 21a, under the action of the elastic restoring force of the spring 26, the pushing member 221 moves in a direction away from the valve core 23 and returns to the initial position. At the same time, the first control handle 21a correspondingly returns to its initial position.

In this way, after the operator releases the first control handle 21a, the pushing member 221 can be reset to the initial position. This implementation method has simple structure and easy operation.

In one example, referring to Figure 3 again, the proportional valve 20 further includes a stopper 27. The stopper 27 includes a main body portion 271 and a flange portion 272. The main body portion 271 is provided with a stopper that is suitable for the end of the pusher 221 to pass through. Hole 273. The stopper 27 is relatively fixed in the axial direction of the valve core 23 . One end of the spring 26 away from the shoulder 221 a of the pusher 221 is sleeved on the main body 271 of the stopper 27 and abuts against the flange 272 . In this example, the flange portion 272 of the stopper 27 can relatively fix the end of the spring 26 away from the pushing member 221, so that when the pushing member 221 moves toward the valve core 23, the spring 26 is compressed, and at the same time, the pushing member 221 can pass through the hole 273 to cause the valve core 23 to move.

In the embodiment in which the proportional valve is implemented as a proportional solenoid valve, it usually has an armature as an actuating element. During normal operation, the armature can move along the axial direction of the valve core. In some embodiments, the relative positions of the pushing member and the armature may be configured such that when the pushing member is in the initial position, the pushing member does not interfere with the movement range of the armature. In this way, the pushing member can be prevented from interfering with the movement of the armature during normal operation.

Figures 5a to 5c show the relative positional relationship between the pushing member 221 and the armature 24 under different circumstances. A detailed description will be given below with reference to Figures 5a to 5c. It should be noted that the armature 24 has a relative first limit position and a second limit position in the axial direction of the valve core 23 , and the first limit position is further away from the pushing member 221 than the second limit position.

In Figure 5a, the first control handle 21a is not rotated, the pushing member 221 is in the initial position, and the armature 24 is in the first extreme position. In Figure 5b, the first control handle 21a is not rotated, the pushing member 221 is in the initial position, and the armature 24 is in the second extreme position. In Figure 5c, the pushing member 221 leaves the initial position as the first control handle 21a is rotated.

As shown in Figure 5a to Figure 5b, when the first control handle 21a is not operated, even if the armature 24 moves At the second extreme position, there is still a distance W between the armature 24 and the pushing member 221, which ensures that the pushing member 221 will not interfere with the movement range of the armature 24 during normal operation. When manual operation is required, as shown in Figure 5c, the operator can operate the first control handle 21a to move the pushing member 221 toward the armature 24, thereby contacting the armature 24 and pushing the armature 24.

It should be understood that although in this embodiment, when the armature 24 is at the second extreme position and the pushing member 221 is at the initial position, there is a gap W between the armature 24 and the pushing member 221 . However, in other embodiments, when the armature 24 is at the second extreme position and the pushing member 221 is at the initial position, the armature 24 and the pushing member 221 may just be in contact, so that when the pushing member 221 is at the initial position, the pushing member 221 can still be realized. It does not interfere with the moving range of the armature 24.

Compared with just contact, there is a distance W between the armature 24 and the pushing member 221, which can avoid misoperation to a certain extent. Specifically, due to the existence of the interval W, there is an idle stroke between the pushing member 221 and the armature 24, and correspondingly, there is also an idle stroke on the first control handle 21a. The operator needs to operate the first control handle 21a to cross the idle stroke in order to move the valve core 23, so the operator's misoperation can be avoided to a certain extent.

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

Please refer to Figures 2 and 3 again. In some embodiments, the proportional valve 20 may also include a second control handle 21b. The operator can adjust the position of the valve core 23 through the second control handle 21b. More specifically, the valve core 23 can move toward the first axial side of itself as the first control handle 21a is operated, and the valve core 23 can move toward the axial direction of itself as the second control handle 21b is operated. The first side moves opposite the second side. In this way, when the proportional valve 20 needs to be manually operated, the operator can move the valve core 23 in two opposite directions through the first control handle 21a and the second control handle 21b, thereby operating the proportional valve 20 quickly, accurately and reliably. .

It should be understood that there are many ways to move the valve core 23 by operating the second control handle 21b, and this disclosure does not specifically limit this. In some embodiments, the proportional valve 20 may also include an adjustment mechanism 22 is another set of the same or similar adjustment mechanism, and the second control handle 21b can cooperate with it, so that the valve core 23 can be moved by operating the second control handle 21b.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Potential alternative implementations of the present disclosure are illustrated below with reference to FIGS. 6 to 8 .

Figure 6 is a schematic structural diagram of some 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 component 281 and a second magnetic component 282 , and the first magnetic component 281 is fixed to the rotating body 222 . The second magnetic part 282 is spaced apart from the first magnetic part and has a relatively fixed position, and the first magnetic part 281 and the second magnetic part 282 are arranged so that same magnetic poles face each other. When the first operating handle 21a is operated, the rotating body 222 moves in the direction of the arrow in FIG. 6 , so that the first magnetic component 281 approaches the second magnetic component 282 . After the operator lets go, the magnetic repulsion between the first magnetic component 281 and the second magnetic component 282 drives the rotary body 222 to reset, thereby driving the pushing member 221 to reset.

7 is a schematic structural diagram of some 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 the pushing member 221 . When the first control handle 21 a is rotated, the cam 29 drives the pushing member 221 to move along the axial direction of the valve core 23 .

Figure 8 is a schematic structural diagram of some components of a proportional valve according to another embodiment of the present disclosure. Referring to FIG. 8 , in this embodiment, the adjustment mechanism includes an actuating block 30 and an elastic member 31 in addition to the pushing member 221 . The actuating block 30 has a matching slope, and the end of the pushing member 221 facing the actuating block 30 also has a matching slope. When the operator presses the first control handle 21a, the mating slope of the actuating block 30 interacts with the mating slope of the pushing member 221, causing the pushing member 221 to move along the axial direction of the valve core 23. When the operator lets go, the elastic member 31 located below the actuating block 30 pushes the first control handle 21a to reset.

It should be understood that the term "include" and its variations used in this application are open-ended inclusion, that is, "including but not limited to." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one further embodiment".

It should be understood that although the terms "first" or "second" etc. may be used in this application to describe various elements (such as a first control handle and a second control handle), these elements are not limited by these terms. Terms are simply used to distinguish one element from another.

It should be noted that each specific technical feature (element) described in the above-mentioned specific embodiments, As long as there is no conflict, they can be combined in any suitable way. In order to avoid unnecessary repetition, various possible combinations will not be further described in this application.

It should be understood that any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in this application, and they should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A proportional valve, characterized by including:

valve core;

regulatory agencies; and

A first control handle is connected to the adjustment mechanism, wherein the adjustment mechanism moves the valve core as the first control handle is operated.
The proportional valve according to claim 1, wherein the adjustment mechanism includes a pusher located on an axial side of the valve core, wherein the pusher is moved along with the first control handle. The valve core is operated to move along the axial direction of the valve core and thereby move the valve core.
The proportional valve according to claim 2, characterized in that the adjustment mechanism further includes:

Rotary body;

A pivot shaft is non-rotatably connected to the first control handle and is non-rotatably connected to the rotary body, wherein the pivot shaft extends non-parallel to the axial direction of the valve core; and

The rotary body seat is connected to the push member and is provided with a groove. The rotary body has an actuating end extending into the groove. As the first control handle is rotated, the rotary body and the The first control handle rotates together around the pivot axis, so that the rotary body seat moves along the axial direction of the valve core under the action of the actuating end.
The proportional valve according to claim 3, wherein the actuating end has a spherical surface and the groove sequentially includes first and second contiguous sections in a direction from its bottom to its top, The second section of the slot gradually expands away from the first section of the slot, and the actuating end is located within the first section of the slot.
The proportional valve according to claim 3, further comprising a housing, the housing is provided with a support hole, one end of the pivot is connected to the first control handle, and the other end passes through the support hole. and connected to the rotary body, wherein the pivot is rotatably supported by the inner wall of the support hole.
The proportional valve according to claim 3, wherein the adjustment mechanism further includes a connecting piece, the rotary body has an intersecting first connection hole and a second connection hole, and the pivot shaft has a third connection hole, Place The pivot extends into the first connection hole, and the connecting piece passes through the second connection hole and extends into the third connection hole.
The proportional valve according to claim 2, further comprising a reset device that keeps the pushing member in the initial position when the control handle is not operated.
The proportional valve according to claim 7, wherein the pusher has a shoulder, and the return device includes a spring, the spring is sleeved on the pusher and is located on the shoulder toward the One side of the valve core, one end of the spring is against the shoulder, and the other end is relatively fixed in the axial direction of the valve core.
The proportional valve according to claim 2, further comprising an armature located between the valve core and the pushing member and capable of moving along the axial direction of the valve core under the action of electromagnetic force, wherein when When the pushing member is in the initial position, the pushing member does not interfere with the moving range of the armature.
The proportional valve according to claim 9, wherein the armature has a first limit position and a second limit position relative to each other in the axial direction of the valve core, and the first limit position is compared to the The second extreme position is away from the pushing member, wherein when the armature is at the second extreme position and the pushing member is at the initial position, there is a gap between the armature and the pushing member.
The proportional valve according to any one of claims 1 to 10, characterized in that the control handle is detachably connected to the adjustment mechanism.
The proportional valve according to any one of claims 1 to 10, characterized in that the valve core moves to the first side of its own axial direction as the first control handle is operated, and the proportional valve It also includes a second control handle, and the valve core moves to a second side of its own axis opposite to the first side as the second control handle is operated.
The proportional valve according to any one of claims 1 to 10, characterized in that the proportional valve is implemented as a proportional electromagnetic directional valve.