CN222458441U - Rocker arm type pinch valve - Google Patents

Abstract

The application relates to the technical field of pinch valves, and provides a rocker arm type pinch valve which comprises a valve seat, a hose, an opening and closing mechanism and two adjusting components. According to the rocker arm type pinch valve disclosed by the application, the adjusting component is additionally arranged, so that the size of the pressing force acted on the hose can be adjusted according to the material or thickness of the hose, and the hose can be pressed within a better pressing force range, thereby being beneficial to prolonging the service life and reliability of the hose and further prolonging the service life of the whole rocker arm type pinch valve.

Description

Rocker arm type pinch valve

Technical Field

The application relates to the technical field of pinch valves, in particular to a rocker arm type pinch valve.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The pinch valve is a valve for opening and closing a flow path by pressing or releasing a hose. For a common pinch valve, the hose used has only one flow path, so that the pinch valve can only control the on-off of a single flow path, but cannot control the on-off of a plurality of flow paths, and further cannot realize the switching of the flow paths, so that the pinch valve has a certain limitation in practical application.

Through searching, a pinch valve capable of controlling the on-off of a plurality of flow paths has been disclosed in patent document CN2023214835260, specifically, the pinch valve disclosed in the patent document can control the on-off of two flow paths by providing a hose with a three-way structure and matching with a rocker arm mechanism of a known rocker arm electromagnetic valve.

However, in the pinch valve disclosed in the above patent document, the hose disposed in the valve seat is rigidly supported by the valve seat, so that it is difficult to adjust the pressing force acting on the hose when the rocker swings as required, and the magnitude of the pressing force acting on the hose directly affects the service life of the hose for hoses of different materials or thicknesses.

Disclosure of utility model

Accordingly, it is an object of the present application to provide a rocker arm pinch valve that facilitates adjusting the amount of pinch force applied to the hose as desired, thereby facilitating the life of the hose.

The aim of the application is achieved by the following technical scheme:

A rocker arm pinch valve, comprising:

A valve seat;

A hose which is housed inside the valve seat and defines a first flow path, a second flow path, and a third flow path that communicates with the first flow path and the second flow path;

An opening and closing mechanism including a first pressing portion aligned with the first flow path of the hose, a second pressing portion aligned with the second flow path of the hose, and an actuating assembly configured to drive the first and second pressing portions to alternately press the flow paths corresponding to the hose so as to alternately switch the first and second flow paths on and off, and

The two adjusting components respectively correspond to the first pressing part and the second pressing part, and the adjusting components comprise:

The accommodating groove is arranged on the valve seat and is opposite to the corresponding pressing part;

a support member provided in the accommodation groove and forming a gap with the corresponding pressing portion for accommodating the flow path of the hose, the support member being configured to be movable in the accommodation groove in a direction away from the corresponding pressing portion;

The adjusting elastic piece is connected with the supporting piece and used for elastically keeping the supporting piece in the accommodating groove, and the elastic force of the adjusting elastic piece can be adjusted.

In some possible embodiments, the adjusting assembly further comprises an adjusting nut screwed into the receiving groove, the adjusting elastic member is disposed between the supporting member and the adjusting nut, and both ends of the adjusting elastic member are connected to the supporting member and the adjusting nut, respectively.

In some possible embodiments, the valve seat includes a first valve body and a second valve body disposed opposite to each other, the first valve body and the second valve body being detachably connected therebetween, the hose being received between the first valve body and the second valve body.

In some possible embodiments, the first flow path, the second flow path, and the third flow path are each provided with a joint extending out of the valve seat.

In some possible embodiments, the ports of the first, second and third flow paths are each provided with a connection to which the fitting is screwed.

In some possible embodiments, the actuation assembly includes a rocker arm pivotally connected to the valve seat such that the rocker arm is capable of rocking side-to-side relative to the valve seat, the first and second hold-down portions each being disposed on the same side of the rocker arm.

In some possible embodiments, the actuation assembly further comprises a sliding portion slidably disposed within the valve seat on a side of the rocker arm remote from the first and second hold-down portions;

The sliding part is provided with a first protruding part which can be abutted to the rocker arm and is aligned with the first pressing part, a sliding groove is formed in the sliding part on the same side as the first protruding part, a first elastic piece and a second protruding part are arranged in the sliding groove, the second protruding part is kept in the sliding groove through the elasticity of the first elastic piece, and the second protruding part can be abutted to the rocker arm and is aligned with the second pressing part.

In some possible embodiments, the actuating assembly further includes a housing, a movable iron core, a second elastic member, and a magnetic unit, where the housing is disposed on one side of the valve seat, the movable iron core is accommodated in the housing and connected to the sliding portion, the second elastic member is sleeved on an outer wall of the movable iron core, two ends of the second elastic member are respectively connected to the movable iron core and the housing, and an elastic force of the second elastic member is greater than that of the first elastic member;

The magnetic unit is configured to apply an electromagnetic force to the movable iron core to force the movable iron core to move in a direction away from the valve seat, so that the movable iron core drives the sliding part to move away from the rocker arm.

In some possible embodiments, the magnetic unit includes a stationary core, a coil bobbin, and a coil, the stationary core is housed inside the housing and disposed opposite to the movable core, the coil is wound inside the housing through the coil bobbin, and the coil is disposed around the movable core and the stationary core.

In some possible embodiments, a detachable rear cover is arranged at one end of the shell, which is aligned with the static iron core.

The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

According to the rocker arm type pinch valve disclosed by the application, the adjusting component is additionally arranged, so that the size of the pressing force acted on the hose can be adjusted according to the material or thickness of the hose, and the hose can be pressed within a better pressing force range, thereby being beneficial to prolonging the service life and reliability of the hose and further prolonging the service life of the whole rocker arm type pinch valve.

Drawings

FIG. 1 is a schematic illustration of a rocker pinch valve according to some embodiments of the present application;

FIG. 2 is a top view of the rocker pinch valve shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 2;

FIG. 4 is an enlarged view of a part of the structure of FIG. 3;

fig. 5 is a schematic structural view of a hose according to some embodiments of the present application.

The icons are 10-valve seat, 11-first valve body, 12-second valve body, 20-hose, 21-first flow path, 22-second flow path, 23-third flow path, 24-joint, 25-connecting portion, 30-opening and closing mechanism, 31-first pressing portion, 32-second pressing portion, 33-rocker arm, 34-sliding portion, 35-first boss, 36-first elastic member, 37-second boss, 38-housing, 39-moving core, 310-second elastic member, 311-stationary core, 312-coil bobbin, 313-coil, 314-back cover, 40-adjusting member, 41-accommodating groove, 42-supporting member, 43-adjusting elastic member, 44-adjusting nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described in connection with the following detailed description. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present application fall within the protection scope of the present application.

Possible embodiments within the scope of the application may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms first, second and the like in the description and in the claims, are not used for any order, quantity or importance, but are used for distinguishing between different elements.

Referring to fig. 1 to 3, an embodiment of the present application discloses a rocker arm pinch valve, wherein fig. 1 shows a schematic structural diagram of an exemplary rocker arm pinch valve disclosed in the embodiment of the present application, fig. 2 is a top view of the rocker arm pinch valve shown in fig. 1, and fig. 3 is a cross-sectional view of the rocker arm pinch valve shown in fig. 1. In general, the rocker arm pinch valve disclosed in embodiments of the present application may include a valve seat 10, a hose 20, an opening and closing mechanism 30, and an adjustment assembly 40.

In an embodiment of the present application, a receiving cavity adapted to the hose 20 is provided inside the valve seat 10, so that the hose 20 can be received inside the valve seat 10, thereby providing protection to the hose 20 through the valve seat 10. Further, in connection with what is shown in fig. 5, the hose 20 has a substantially three-way structure such that the hose 20 defines a first flow path 21, a second flow path 22, and a third flow path 23 that communicates with both the first flow path 21 and the second flow path 22, respectively.

It will be appreciated that in some embodiments of the present application, as shown in fig. 3, the valve seat 10 may further include a first valve body 11 and a second valve body 12 disposed opposite each other. Wherein, the first valve body 11 and the second valve body 12 are detachably connected, and the hose 20 is accommodated between the first valve body 11 and the second valve body 12. That is, when the first valve body 11 and the second valve body 12 are coupled to form the valve seat 10, a receiving chamber adapted to the hose 20 can be formed therebetween so that the hose 20 can be received between the first valve body 11 and the second valve body 12. In this way, it is not only convenient to mount the hose 20 inside the valve seat 10, but also to disassemble the first valve body 11 and the second valve body 12 when necessary, so as to replace the hose 20 or to perform maintenance and repair on other relevant components disposed inside the valve seat 10, which will be described later.

Meanwhile, in some embodiments of the present application, as shown in fig. 3 and 5, the first, second and third flow paths 21, 22 and 23 are each provided with a joint 24 extending to the outside of the valve seat 10, so that the corresponding flow paths of the hose 20 are connected to the external piping through the joint 24. Further, in order to facilitate the connection 24 to communicate with the corresponding flow path, the ports of the first flow path 21, the second flow path 22 and the third flow path 23 are each provided with a connection portion 25, and the connection 24 is detachably connected to the corresponding connection portion 25. The connection between the connector 24 and the connecting portion 25 may be achieved by providing a plug hole on the connecting portion 25 and plugging the connector 24 into the plug hole. And, the connection between the joint 24 and the corresponding connection portion 25 should be provided with a corresponding sealing structure to avoid leakage of the fluid medium flowing through the joint 24.

In the embodiment of the present application, the opening and closing mechanism 30 is used to alternately open and close the first flow path 21 and the second flow path 22 of the hose 20, thereby realizing the switching of the flow paths. Specifically, the opening and closing mechanism 30 may include a first pressing portion 31, a second pressing portion 32, and an actuating assembly.

As shown in fig. 4, the first compressing portion 31 is aligned with the first flow path 21 of the hose 20, the second compressing portion 32 is aligned with the second flow path 22 of the hose 20, and the actuating assembly is configured to drive the first compressing portion 31 and the second compressing portion 32 to alternately compress the corresponding flow paths of the hose 20, so that the first flow path 21 and the second flow path 22 are alternately opened and closed. That is, in actual use, the first compressing part 31 is used to compress the first flow path 21 of the hose 20, and when the first compressing part 31 compresses the first flow path 21 of the hose 20 under the action of the actuating assembly, the first flow path 21 is closed, and at this time, the second flow path 22 is in communication with the third flow path 23, and correspondingly, the second compressing part 32 is used to compress the second flow path 22 of the hose 20, and when the second compressing part 32 compresses the second flow path 22 of the hose 20 under the action of the actuating assembly, the second flow path 22 is closed, and at this time, the first flow path 21 is in communication with the third flow path 23. Thus, the flow path can be switched.

It should be noted that, the flow path switching principle of the rocker arm type pinch valve disclosed in the embodiment of the present application is substantially the same as that of the rocker arm type pinch valve mentioned in the background art of the present application, and will not be described in detail herein.

On this basis, in order to realize adjustment of the pressing force acting on the hose 20, in combination with what is shown in fig. 3, the rocker arm type pinch valve disclosed in the embodiment of the present application is additionally provided with two adjusting assemblies 40, and the two adjusting assemblies 40 correspond to the first pressing portion 31 and the second pressing portion 32 respectively. That is, one of the adjusting members 40 is correspondingly engaged with the first pressing portion 31, and the other adjusting member 40 is correspondingly engaged with the second pressing portion 32.

Still further, for a single adjustment assembly 40, the adjustment assembly 40 further includes a receiving groove 41, a support member 42, and an adjustment elastic member 43. As shown in fig. 4, the accommodating groove 41 is opened on the valve seat 10 and is disposed opposite to the corresponding pressing portion, the supporting member 42 is disposed in the accommodating groove 41, and a gap for accommodating the flow path corresponding to the hose 20 is formed between the supporting member 42 and the corresponding pressing portion. That is, in the adjusting unit 40 corresponding to the first pressing portion 31, the accommodating groove 41 of the adjusting unit 40 is opened in the valve seat 10 and is provided opposite to the first pressing portion 31, and a gap for accommodating the first flow path 21 of the hose 20 is formed between the first pressing portion 31 and the support 42 provided in the accommodating groove 41 of the adjusting unit 40. By analogy, for the adjusting unit 40 corresponding to the second pressing portion 32, the accommodating groove 41 of the adjusting unit 40 is opened on the valve seat 10 and is disposed opposite to the second pressing portion 32, and a gap for accommodating the second flow path 22 of the hose 20 is formed between the second pressing portion 32 and the support 42 disposed in the accommodating groove 41 of the adjusting unit 40.

Also, for the single adjustment assembly 40, the support 42 of the adjustment assembly 40 is further configured to be movable in the receiving groove 41 in a direction away from the corresponding pressing portion. That is, the support member 42 of the adjustment member 40 corresponding to the first pressing portion 31 is movable in the accommodating groove 41 in a direction away from the first pressing portion 31, and the support member 42 of the adjustment member 40 corresponding to the second pressing portion 32 is movable in the accommodating groove 41 in a direction away from the second pressing portion 32.

Meanwhile, with continued reference to fig. 4, for the single adjusting assembly 40, the adjusting elastic member 43 of the adjusting assembly 40 is connected to the supporting member 42, the adjusting elastic member 43 is used for elastically holding the supporting member 42 in the receiving groove 41, so that the supporting member 42 can provide support for the corresponding flow path of the hose 20, and the elastic force of the adjusting elastic member 43 is adjustable.

Thus, when the rocker arm pinch valve disclosed in the embodiment of the present application is actually applied, the supporting member 42 of the adjusting assembly 40 corresponding to the pressing portion can be elastically held in the accommodating groove 41 and support the flow path corresponding to the hose 20 under the action of the adjusting elastic member 43 when the corresponding pressing portion of the opening and closing mechanism 30 does not press the flow path corresponding to the hose 20. For ease of understanding, the first pressing portion 31 and the adjusting unit 40 corresponding to the first pressing portion 31 will be described as an example.

Specifically, it is assumed that the first compressing part 31 is not compressed to the first flow path 21 of the hose 20 in the initial state, at this time, the supporting piece 42 of the adjusting assembly 40 corresponding to the first compressing part 31 is elastically held in the accommodating groove 41 by the adjusting elastic piece 43, and the supporting piece 42 provides support to the first flow path 21 of the hose 20. On this basis, when the first pressing portion 31 presses the first flow path 21 of the hose 20 under the action of the actuating assembly, the supporting member 42 is pressed and moves away from the first pressing portion 31 as the first pressing portion 31 presses the first flow path 21, so that the adjusting elastic member 43 is compressed, and after the adjusting elastic member 43 is compressed to a limited state (i.e., the adjusting elastic member 43 cannot be compressed), the supporting member 42 cannot move any more, after which, as the first pressing portion 31 continues to press the first flow path 21, the pressing force applied by the first pressing portion 31 directly acts on the first flow path 21, so that the first flow path 21 starts to be closed, and until the first flow path 21 is completely closed. Accordingly, when the first pressing portion 31 removes the pressing force applied to the first flow path 21, the supporting member 42 is restored by the adjusting elastic member 43, thereby providing the first flow path 21 with support again.

It can be understood that, in conjunction with the closing process of the first flow path 21, since the first pressing portion 31 moves a certain distance away from the first pressing portion 31 when pressing the first flow path 21 of the hose 20, the supporting member 42 of the adjusting assembly 40 corresponding to the first pressing portion 31 moves a certain distance away from the first pressing portion 31, so that the pressing force is directly applied to the first flow path 21 by the first pressing portion 31 after the adjusting elastic member 43 is compressed to the limit state, and since the movement stroke of the first pressing portion 31 when pressing the first flow path 21 is certain, the moving distance of the supporting member 42 away from the first pressing portion 31 is related to the elastic force of the adjusting elastic member 43, the adjusting distance of the supporting member 42 away from the first pressing portion 31 can be realized by adjusting the elastic force of the adjusting elastic member 43, and the pressing force of the first pressing portion 31 on the first flow path 21 can be finally adjusted, so that the first flow path 21 of the hose 20 can be pressed within a better pressing force range, and the service life and reliability of the hose 20 can be further improved.

The process when the second pressing portion 32 presses the second flow path 22 of the hose 20 is the same as the process when the first pressing portion 31 presses the first flow path 21 of the hose 20, and will not be described in detail here. Also, in practical implementation, the adjusting elastic member 43 may be a straight spring, and of course, in other embodiments of the present application, the adjusting elastic member 43 may be a disc spring or other similar components.

Further, the adjustment of the elastic force of the adjustment elastic member 43 can be achieved as described below. Specifically, in some embodiments of the present application, with continued reference to fig. 4, for a single adjustment assembly, the adjustment assembly may further include an adjustment nut 44, and the adjustment nut 44 is screwed into the receiving groove 41, where the adjustment elastic member 43 is disposed between the support member 42 and the adjustment nut 44, and both ends of the adjustment elastic member 43 are connected to the support member 42 and the adjustment nut 44, respectively.

Therefore, the distance between the adjusting nut 44 and the supporting piece 42 can be adjusted by screwing the adjusting nut 44, and the elastic force of the adjusting elastic piece 43 is adjusted, so that the operation is simple and convenient.

It will be appreciated that in some implementations of the application, the end of the receiving groove 41 facing the corresponding pinched portion may be provided in a stepped configuration, in particular, the receiving groove 41 includes a first groove section proximate the corresponding pinched portion and a second groove section in communication with the first groove section, and the first groove section has an inner diameter that is smaller than the inner diameter of the second groove section. Correspondingly, the supporting member 42 includes a first supporting portion and a second supporting portion connected in sequence, where an outer diameter of the first supporting portion is adapted to an inner diameter of the first groove segment and is accommodated in the first groove segment, and an outer diameter of the second supporting portion is adapted to the second groove segment and is accommodated in the second groove segment. Through the above arrangement, when the adjusting nut 44 is screwed to reduce the distance between the adjusting nut 44 and the supporting member 42, the supporting member 42 at the initial position cannot move toward the direction of the corresponding pressing portion, so that the supporting member 42 at the initial position is prevented from being ejected out of the accommodating groove 41 by the adjusting elastic member 43, and the elastic force of the adjusting elastic member 43 is adjusted smoothly. The initial position of the support member 42 refers to a position of the support member 42 when the corresponding pressing portion does not apply a pressing force to the corresponding flow path of the hose 20, that is, a position of the support member 42 shown in fig. 4. Of course, in other embodiments of the present application, the limiting portion may be provided in the accommodating groove 41 to directly limit the movement of the support member 42 at the initial position in the direction of the corresponding pressing portion.

In some embodiments of the present application, the actuation assembly for actuating the flow paths corresponding to the pinch hoses 20 in which the first pinch portions 31 and the second pinch portions 32 alternate may be substantially the same as that employed in the rocker-type solenoid valve of the present application as exemplified in the background, that is, a rocker mechanism of a known rocker-type solenoid valve may be employed as the actuation assembly.

Specifically, the actuation assembly may include a rocker arm 33. In connection with what is shown in fig. 3 and 4, the rocker arm 33 is pivotably connected to the valve seat 10 by a rotation shaft so that the rocker arm 33 can swing left and right with respect to the valve seat 10, and the first pressing portion 31 and the second pressing portion 32 are both provided on the same side of the rocker arm 33. Thus, when the rocker arm 33 swings left and right with respect to the valve seat 10, the rocker arm 33 drives the first pressing portion 31 and the second pressing portion 32 to alternately press the flow paths corresponding to the hoses 20. The first pressing portion 31, the second pressing portion 32 and the rocker arm 33 may be of an integral structure, however, in other embodiments of the present application, the first pressing portion 31 and the second pressing portion 32 may be separate components connected to the rocker arm 33.

It will be appreciated that in actual implementation, the rocker arm 33 may be disposed within the first valve body 11 of the valve seat 10, while the adjustment assembly 40, and in particular the receiving groove 41, may be disposed within the second valve body 12 of the valve seat 10, thereby making the overall rocker arm pinch valve more compact.

Still further, to achieve the side-to-side swinging of the rocker arm 33, with continued reference to fig. 3 and 4, the actuating assembly may further include a sliding portion 34, where the sliding portion 34 is slidably disposed in the first valve body 11 of the valve seat 10, and the sliding portion 34 is located on a side of the rocker arm 33 away from the first pressing portion 31 and the second pressing portion 32. Meanwhile, the sliding portion 34 is provided with a first protruding portion 35 which can be abutted against the rocker arm 33 and aligned with the first pressing portion 31, the sliding portion 34 on the same side as the first protruding portion 35 is further provided with a sliding groove, a first elastic member 36 and a second protruding portion 37 are arranged in the sliding groove, the second protruding portion 37 is slidably and elastically held in the sliding groove through the first elastic member 36, and the second protruding portion 37 can be abutted against the rocker arm 33 and aligned with the second pressing portion 32.

Thus, when the sliding portion 34 applies pressure to the rocker arm 33, the first protruding portion 35 on the sliding portion 34 will directly abut against the end of the rocker arm 33 provided with the first pressing portion 31, at this time, the first protruding portion 35 is in hard contact with the rocker arm 33, while the second protruding portion 37 will retract into the sliding groove when contacting the end of the rocker arm 33 provided with the second pressing portion 32, so that the first elastic member 36 is compressed, and the second protruding portion 37 is in soft contact with the rocker arm 33, at this time, the end of the rocker arm 33 provided with the first pressing portion 31 receives a pressure greater than the end of the rocker arm 33 provided with the second pressing portion 32, and therefore the rocker arm 33 swings right and drives the first pressing portion 31 to press the first flow path 21 of the hose 20.

Conversely, when the sliding portion 34 does not apply pressure to the rocker arm 33, the first protruding portion 35 will not contact the rocker arm 33 any more or will be in soft contact with the rocker arm 33, the end of the rocker arm 33 provided with the first pressing portion 31 will not be pressed any more, at this time, the first elastic member 36 located in the sliding groove will release the elastic force to force the second protruding portion 37 to press against the end of the rocker arm 33 provided with the second pressing portion 32, and the end of the rocker arm 33 provided with the second pressing portion 32 is pressed, so that the rocker arm 33 swings leftwards and drives the second pressing portion 32 to press the second flow path of the hose 20.

On this basis, in order to achieve sliding of the sliding portion 34 inside the valve seat 10 to apply pressure to the rocker arm 33 or release pressure applied to the rocker arm 33 through the sliding portion 34, the actuating assembly may further include a housing 38, a moving iron core 39, a second elastic member 310, and a magnetic unit, as shown in fig. 3. The casing 38 is disposed on one side of the first valve body 11 of the valve seat 10, specifically, one side of the first valve body 11 far away from the second valve body 12, the movable iron core 39 is accommodated in the casing 38 and connected to the sliding portion 34, the second elastic member 310 is sleeved on an outer wall of the movable iron core 39, two ends of the second elastic member 310 are respectively connected with the movable iron core 39 and the casing 38, and an elastic force of the second elastic member 310 is greater than an elastic force of the first elastic member 36. Wherein, the first elastic member 36 and the second elastic member 310 may each employ a straight spring.

The magnetic unit is configured to apply an electromagnetic force to the plunger 39 to force the plunger 39 to move in a direction away from the valve seat 10, so that the plunger 39 drives the sliding portion 34 away from the rocker arm 33. Further, the magnetic unit further includes a stationary core 311, a coil frame 312, and a coil 313, wherein the stationary core 311 is accommodated in the housing 38 and is disposed opposite to the movable core 39, the coil 313 is wound in the housing 38 through the coil frame 312, and the coil 313 is disposed around the movable core 39 and the stationary core 311.

So configured, when the coil 313 is energized, an electromagnetic force is generated, at this time, the movable iron core 39 will have a tendency to move toward the stationary iron core 311 under the action of the electromagnetic force, when the electromagnetic force is greater than the elastic force of the second elastic member 310, the movable iron core 39 will overcome the elastic force of the second elastic member 310 and move toward the stationary iron core 311, at this time, the second elastic member 310 compresses to prestore an elastic force, and the movable iron core 39 drives the sliding portion 34 to synchronously move toward the direction of the stationary iron core 311, so that the first protrusion portion 35 of the sliding portion 34 withdraws the pressure applied to the end of the rocker arm 33 where the first pressing portion 31 is provided, at this time, the rocker arm 33 will swing leftward.

On the contrary, when the coil 313 is de-energized, the electromagnetic force acting on the movable iron core 39 is gradually weakened until it disappears, and in this process, the second elastic member 310 releases the pre-stored elastic force, so that the movable iron core 39 is forced to drive the sliding portion 34 to move towards the rocker arm 33, and since the elastic force of the second elastic member 310 is greater than that of the first elastic member 36, a sufficient pressure can be applied to the end of the rocker arm 33 provided with the first pressing portion 31 through the first protruding portion 35 of the sliding portion 34, so that the rocker arm 33 swings to the right.

On this basis, in order to facilitate the installation of the relevant components inside the casing 38 and facilitate the maintenance and repair of the relevant components inside the casing 38 in the later period, in combination with what is shown in fig. 3, a detachable rear cover 314 may be further disposed at one end of the casing 38 aligned with the static iron core 311.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A rocker arm pinch valve, comprising:

A valve seat;

A hose which is housed inside the valve seat and defines a first flow path, a second flow path, and a third flow path that communicates with the first flow path and the second flow path;

An opening and closing mechanism including a first pressing portion aligned with the first flow path of the hose, a second pressing portion aligned with the second flow path of the hose, and an actuating assembly configured to drive the first and second pressing portions to alternately press the flow paths corresponding to the hose so as to alternately switch the first and second flow paths on and off, and

The two adjusting components respectively correspond to the first pressing part and the second pressing part, and the adjusting components comprise:

The accommodating groove is arranged on the valve seat and is opposite to the corresponding pressing part;

a support member provided in the accommodation groove and forming a gap with the corresponding pressing portion for accommodating the flow path of the hose, the support member being configured to be movable in the accommodation groove in a direction away from the corresponding pressing portion;

The adjusting elastic piece is connected with the supporting piece and used for elastically keeping the supporting piece in the accommodating groove, and the elastic force of the adjusting elastic piece can be adjusted.

2. The rocker pinch valve of claim 1, wherein the adjustment assembly further comprises an adjustment nut threadably coupled to the receiving groove, the adjustment spring is disposed between the support member and the adjustment nut, and both ends of the adjustment spring are coupled to the support member and the adjustment nut, respectively.

3. The rocker pinch valve of claim 1 or 2, wherein the valve seat comprises first and second oppositely disposed valve bodies, the first and second valve bodies being detachably connected therebetween, the hose being received between the first and second valve bodies.

4. The rocker pinch valve of claim 1 or 2, wherein the first, second and third flow paths are each provided with a joint extending beyond the valve seat.

5. The rocker pinch valve of claim 4, wherein the ports of the first, second and third flow paths are each provided with a connection, the fitting being detachably connected to the corresponding connection.

6. The rocker valve of claim 1 or 2, wherein the actuation assembly comprises a rocker arm pivotally connected to the valve seat such that the rocker arm is capable of rocking side-to-side relative to the valve seat, the first and second pinch portions each being disposed on the same side of the rocker arm.

7. The rocker arm pinch valve of claim 6, wherein the actuation assembly further comprises a sliding portion slidably disposed within the valve seat on a side of the rocker arm remote from the first and second pinch portions;

The sliding part is provided with a first protruding part which can be abutted to the rocker arm and is aligned with the first pressing part, a sliding groove is formed in the sliding part on the same side as the first protruding part, a first elastic piece and a second protruding part are arranged in the sliding groove, the second protruding part is kept in the sliding groove through the elasticity of the first elastic piece, and the second protruding part can be abutted to the rocker arm and is aligned with the second pressing part.

8. The rocker arm pinch valve of claim 7, wherein the actuating assembly further comprises a housing, a movable iron core, a second elastic member and a magnetic unit, the housing is arranged on one side of the valve seat, the movable iron core is accommodated in the housing and connected to the sliding part, the second elastic member is sleeved on the outer wall of the movable iron core, two ends of the second elastic member are respectively connected with the movable iron core and the housing, and the elastic force of the second elastic member is larger than that of the first elastic member;

The magnetic unit is configured to apply an electromagnetic force to the movable iron core to force the movable iron core to move in a direction away from the valve seat, so that the movable iron core drives the sliding part to move away from the rocker arm.

9. The rocker arm pinch valve of claim 8, wherein the magnetic unit comprises a stationary core, a coil former, and a coil, the stationary core is housed inside the housing and disposed opposite the movable core, the coil is wound inside the housing through the coil former, and the coil is disposed around the movable core and the stationary core.

10. The rocker pinch valve of claim 9, wherein the end of the housing aligned with the stationary core is provided with a removable rear cap.