Rocker arm type pinch valve

Abstract

The utility model 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 assemblies. According to the rocker arm type pinch valve, by additionally arranging the adjusting assembly, the pressing force acting on the hose can be adjusted according to the material or thickness of the hose, so that the hose can be pressed within a better pressing force range, the service life of the hose is prolonged, the reliability of the hose is improved, and the service life of the hose is prolonged. And the service life of the whole rocker arm type pinch valve is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of pinch valves, and in particular to a rocker arm type pinch valve. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] A pinch valve is a valve that opens and closes a flow path by compressing or releasing a hose. In common pinch valves, the hose used has only one flow path, so that this type of pinch valve can only control the on and off of a single flow path, but cannot control the on and off of multiple flow paths, and thus cannot switch flow paths, so there are certain limitations in practical applications.

[0004] After searching, a pinch valve capable of controlling the on-off of multiple flow paths has been disclosed in the patent document with application number CN2023214835260. Specifically, the pinch valve disclosed in the patent document is capable of controlling the on-off of two flow paths by providing a hose with a three-way structure and cooperating with the rocker mechanism of a known rocker solenoid valve.

[0005] However, in the clamp valve disclosed in the above patent document, the hose arranged in the valve seat is rigidly supported by the valve seat, so that it is difficult to adjust the clamping force acting on the hose when the rocker arm swings as needed. For hoses of different materials or thicknesses, the size of the clamping force acting on the hose will directly affect the service life of the hose. Utility Model Content

[0006] In view of this, the purpose of the present application is to provide a rocker-arm clamp valve that can adjust the size of the clamping force acting on the hose as needed, thereby facilitating the improvement of the service life of the hose.

[0007] The purpose of this application is achieved through the following technical solutions:

[0008] A rocker arm type pinch valve, comprising:

[0009] Valve seat;

[0010] a hose, which is received in the valve seat and defines a first flow path, a second flow path, and a third flow path communicating with the first flow path and the second flow path;

[0011] The opening and closing mechanism comprises a first pressing part, a second pressing part and an actuating assembly; the first pressing part is aligned with the first flow path of the hose, the second pressing part is aligned with the second flow path of the hose, and the actuating assembly is configured to drive the first pressing part and the second pressing part to alternately press the flow path corresponding to the hose, so that the first flow path and the second flow path are alternately opened and closed; and,

[0012] Two adjustment components, corresponding to the first pressing part and the second pressing part respectively; the adjustment components include:

[0013] An accommodating groove is provided on the valve seat and is arranged opposite to the corresponding pressing portion;

[0014] A support member is disposed in the receiving groove and forms a gap with the corresponding pressing portion for accommodating the flow path corresponding to the hose; the support member is configured to be able to move in the receiving groove in a direction away from the corresponding pressing portion;

[0015] The adjusting elastic member is connected to the supporting member and is used to elastically retain the supporting member in the containing groove; the elastic force of the adjusting elastic member is adjustable.

[0016] In some possible embodiments, the adjustment assembly also includes an adjustment nut, which is threadedly connected to the accommodating groove, and the adjustment elastic member is arranged between the support member and the adjustment nut, and both ends of the adjustment elastic member are respectively connected to the support member and the adjustment nut.

[0017] In some possible embodiments, the valve seat includes a first valve body and a second valve body that are arranged opposite to each other, the first valve body and the second valve body are detachably connected, and the hose is accommodated between the first valve body and the second valve body.

[0018] In some possible embodiments, the first flow path, the second flow path, and the third flow path are all provided with joints extending outside the valve seat.

[0019] In some possible embodiments, ports of the first flow path, the second flow path, and the third flow path are all provided with connecting portions, and the joint is threadedly connected to the connecting portion.

[0020] In some possible embodiments, the actuating assembly includes a rocker arm, which is pivotally connected to the valve seat so that the rocker arm can swing left and right relative to the valve seat, and the first clamping portion and the second clamping portion are both arranged on the same side of the rocker arm.

[0021] In some possible embodiments, the actuating assembly further includes a sliding portion; the sliding portion is slidably disposed in the valve seat and is located on a side of the rocker arm away from the first pressing portion and the second pressing portion;

[0022] The sliding portion is provided with a first protrusion that can abut against the rocker arm and align with the first clamping portion. A sliding groove is provided on the sliding portion on the same side as the first protrusion. A first elastic member and a second protrusion are provided in the sliding groove. The second protrusion is elastically retained in the sliding groove by the first elastic member, and the second protrusion can abut against the rocker arm and align with the second clamping portion.

[0023] In some possible embodiments, the actuating assembly further includes a housing, a moving iron core, a second elastic member, and a magnetic unit, wherein the housing is disposed on one side of the valve seat, the moving iron core is received in the housing and connected to the sliding portion, the second elastic member is sleeved on an outer wall of the moving iron core, two ends of the second elastic member are respectively connected to the moving iron core and the housing, and the elastic force of the second elastic member is greater than the elastic force of the first elastic member;

[0024] The magnetic unit is configured to apply an electromagnetic force to the moving iron core, forcing the moving iron core to move in a direction away from the valve seat, so as to drive the sliding portion to move away from the rocker arm through the moving iron core.

[0025] In some possible embodiments, the magnetic unit includes a static iron core, a coil frame and a coil, the static iron core is accommodated inside the shell and arranged opposite to the moving iron core, the coil is wound inside the shell through the coil frame, and the coil is arranged around the moving iron core and the static iron core.

[0026] In some possible embodiments, a detachable rear cover is provided at one end of the housing that is aligned with the static iron core.

[0027] The technical solution of the embodiment of the present application has at least the following advantages and beneficial effects:

[0028] The rocker-arm pinch valve disclosed in the present application can adjust the size of the clamping force acting on the hose according to the material or thickness of the hose by adding an adjustment component, so that the hose can be clamped within a preferred clamping force range, which is beneficial to improving the service life and reliability of the hose, and further improving the service life of the entire rocker-arm pinch valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a rocker-type pinch valve provided in some embodiments of the present application;

[0030] Figure 2 for Figure 1 A top view of a rocker-arm pinch valve is shown;

[0031] Figure 3 for Figure 2 Sectional view along AA direction;

[0032] Figure 4 for Figure 3 A magnified view of the local structure in

[0033] Figure 5 A schematic diagram of the structure of a hose provided in some embodiments of the present application.

[0034] Icons: 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-connector, 25-connecting part, 30-opening and closing mechanism, 31-first clamping part, 32-second clamping part, 33-rocker arm, 34-sliding part, 35-first protruding part, 36-first elastic part, 37-second protruding part, 38-housing, 39-moving iron core, 310-second elastic part, 311-static iron core, 312-coil frame, 313-coil, 314-back cover, 40-adjusting assembly, 41-receiving groove, 42-supporting part, 43-adjusting elastic part, 44-adjusting nut. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific implementation methods. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Compared to the embodiments shown in the drawings, feasible implementations within the scope of protection of the present application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0038] Please refer to Figures 1 to 3 , the embodiment of the present application discloses a rocker-arm pinch valve, wherein, Figure 1 : shows a schematic structural diagram of an exemplary rocker-type pinch valve disclosed in an embodiment of the present application, Figure 2 for Figure 1 A top view of a rocker-type pinch valve is shown. Figure 3 for Figure 1 A cross-sectional view of a rocker-type pinch valve is shown. In general, the rocker-type pinch valve disclosed in the embodiment of the present application may include a valve seat 10 , a hose 20 , an opening and closing mechanism 30 , and an adjusting assembly 40 .

[0039] In the 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 for the hose 20 through the valve seat 10. Figure 5 As shown, the hose 20 is generally a three-way structure, so that the hose 20 defines a first flow path 21, a second flow path 22, and a third flow path 23 that is connected to both the first flow path 21 and the second flow path 22.

[0040] It is understood that in some embodiments of the present application, Figure 3 As shown, the valve seat 10 may further include a first valve body 11 and a second valve body 12 that are arranged opposite to each other. The first valve body 11 and the second valve body 12 are detachably connected, and the hose 20 is received 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 connected to form the valve seat 10, a receiving cavity adapted to the hose 20 can be formed between the two, 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 install the hose 20 inside the valve seat 10, but also convenient to disassemble the first valve body 11 and the second valve body 12 when necessary, so as to replace the hose 20 or to maintain and repair other related components arranged inside the valve seat 10 to be described below.

[0041] At the same time, in some embodiments of the present application, Figure 3 and Figure 5As shown in the figure, the first flow path 21, the second flow path 22 and the third flow path 23 are all provided with a connector 24 extending to the outside of the valve seat 10, so that the corresponding flow path of the hose 20 can be connected to the external pipeline through the connector 24. Furthermore, in order to facilitate the connection between the connector 24 and the corresponding flow path, the ports of the first flow path 21, the second flow path 22 and the third flow path 23 are all provided with a connecting portion 25, and the connector 24 is detachably connected to the corresponding connecting portion 25. The connection between the connector 24 and the connecting portion 25 can be achieved by providing a plug-in hole on the connecting portion 25 and plugging the connector 24 into the plug-in hole. In addition, a corresponding sealing structure should also be provided at the connection between the connector 24 and the corresponding connecting portion 25 to prevent leakage of the fluid medium flowing through the connector 24.

[0042] 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 switching 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.

[0043] like Figure 4 As shown, the first pressing part 31 is aligned with the first flow path 21 of the hose 20, and the second pressing part 32 is aligned with the second flow path 22 of the hose 20, and the actuating assembly is configured to drive the first pressing part 31 and the second pressing part 32 to alternately press the flow path corresponding to the hose 20, so that the first flow path 21 and the second flow path 22 are alternately switched on and off. That is to say, in actual application, the first pressing part 31 is used to press the first flow path 21 of the hose 20, and when the first pressing part 31 presses the first flow path 21 of the hose 20 under the action of the actuating assembly, the first flow path 21 will be closed, and at this time, the second flow path 22 and the third flow path 23 are connected; correspondingly, the second pressing part 32 is used to press the second flow path 22 of the hose 20, and when the second pressing part 32 presses the second flow path of the hose 20 under the action of the actuating assembly, the second flow path 22 will be closed, and at this time, the first flow path 21 and the third flow path 23 are connected. In this way, the switching of the flow paths can be achieved.

[0044] It should be noted that the flow path switching principle of the rocker-type pinch valve disclosed in the embodiment of the present application is substantially the same as that of the rocker-type pinch valve mentioned in the background technology of the present application, and will not be elaborated herein.

[0045] On this basis, in order to adjust the size of the pressing force acting on the hose 20, Figure 3 As shown in the figure, the rocker-type pinch valve disclosed in the embodiment of the present application is additionally provided with two adjusting components 40, and the two adjusting components 40 respectively correspond to the first pressing part 31 and the second pressing part 32. That is, one adjusting component 40 corresponds to the first pressing part 31, and the other adjusting component 40 corresponds to the second pressing part 32.

[0046] Furthermore, for a single adjustment component 40, the adjustment component 40 further includes a receiving groove 41, a support member 42 and an adjustment elastic member 43. Figure 4 As shown, the receiving groove 41 is provided on the valve seat 10 and is arranged opposite to the corresponding pressing part, the support member 42 is provided in the receiving groove 41, and a gap for accommodating the flow path corresponding to the hose 20 is formed between the support member 42 and the corresponding pressing part. That is to say, for the adjustment assembly 40 corresponding to the first pressing part 31, the receiving groove 41 of the adjustment assembly 40 is provided on the valve seat 10 and is arranged opposite to the first pressing part 31, and the support member 42 provided in the receiving groove 41 of the adjustment assembly 40 forms a gap for accommodating the first flow path 21 of the hose 20 with the first pressing part 31. By analogy, for the adjustment assembly 40 corresponding to the second pressing part 32, the receiving groove 41 of the adjustment assembly 40 is provided on the valve seat 10 and is arranged opposite to the second pressing part 32, and the support member 42 provided in the receiving groove 41 of the adjustment assembly 40 forms a gap for accommodating the second flow path 22 of the hose 20 with the second pressing part 32.

[0047] Furthermore, for a single adjustment assembly 40, the support member 42 of the adjustment assembly 40 is also configured to be able to move in the receiving groove 41 in a direction away from the corresponding pressing portion. That is, for the adjustment assembly 40 corresponding to the first pressing portion 31, the support member 42 of the adjustment assembly 40 can move in the receiving groove 41 in a direction away from the first pressing portion 31; for the adjustment assembly 40 corresponding to the second pressing portion 32, the support member 42 of the adjustment assembly 40 can move in the receiving groove 41 in a direction away from the second pressing portion 32.

[0048] Meanwhile, continue to refer to Figure 4 For a single adjustment component 40, the adjustment elastic member 43 of the adjustment component 40 is connected to the support member 42. The adjustment elastic member 43 is used to elastically retain the support member 42 in the accommodating groove 41, so that the support member 42 can provide support for the flow path corresponding to the hose 20, and the elastic force of the adjustment elastic member 43 is adjustable.

[0049] Thus, when the rocker-type pinch valve disclosed in the embodiment of the present application is actually used, when the corresponding pressing part of the opening and closing mechanism 30 does not press the flow path corresponding to the hose 20, the support member 42 of the adjustment assembly 40 corresponding to the pressing part can be elastically retained in the receiving groove 41 under the action of the adjustment elastic member 43 and support the flow path corresponding to the hose 20. For ease of understanding, the first pressing part 31 and the adjustment assembly 40 corresponding to the first pressing part 31 will be used as an example for description.

[0050] Specifically, assuming that in the initial state, the first pressing part 31 does not press the first flow path 21 of the hose 20, at this time, the support member 42 of the adjustment assembly 40 corresponding to the first pressing part 31 is elastically retained in the receiving groove 41 under the action of the adjustment elastic member 43, and the support member 42 provides support for the first flow path 21 of the hose 20. On this basis, when the first pressing part 31 presses the first flow path 21 of the hose 20 under the action of the actuating assembly, as the first pressing part 31 presses the first flow path 21, the support member 42 will be compressed and move in a direction away from the first pressing part 31, so that the adjustment elastic member 43 is compressed; after the adjustment elastic member 43 is compressed to the limit state (that is, the adjustment elastic member 43 cannot be compressed), the support member 42 will no longer be able to move, and thereafter, as the first pressing part 31 continues to press the first flow path 21, the pressing force applied by the first pressing part 31 will directly act on the first flow path 21, so that the first flow path 21 begins to close, and until the first flow path 21 is completely closed. Correspondingly, when the first pressing portion 31 cancels the pressing force applied to the first flow path 21 , the support member 42 will be reset under the action of the adjusting elastic member 43 , thereby providing support for the first flow path 21 again.

[0051] It can be understood that, in combination with the closing process of the first flow path 21 mentioned above, it can be seen that when the first clamping portion 31 clamps the first flow path 21 of the hose 20, the support member 42 of the adjusting assembly 40 corresponding to the first clamping portion 31 will first move a certain distance in the direction away from the first clamping portion 31, so that after the adjusting elastic member 43 is compressed to the limit state, the first clamping portion 31 will directly apply a clamping force to the first flow path 21, and since the movement stroke of the first clamping portion 31 when clamping the first flow path 21 is certain, and the distance that the support member 42 moves in the direction away from the first clamping portion 31 is related to the elastic force of the adjusting elastic member 43, therefore, by adjusting the elastic force of the adjusting elastic member 43, the distance that the support member 42 can move in the direction away from the first clamping portion 31 can be adjusted, and then finally the size of the clamping force of the first clamping portion 31 acting on the first flow path 21 can be adjusted, so that the first flow path 21 of the hose 20 can be clamped within a preferred clamping force range, thereby improving the service life and reliability of the hose 20.

[0052] It should be noted that the process when the second pressing part 32 presses the second flow path 22 of the hose 20 is the same as the process when the first pressing part 31 presses the first flow path 21 of the hose 20, and no further details are given here. In addition, in actual implementation, the above-mentioned adjustment elastic member 43 can be a straight spring. Of course, in other embodiments of the present application, the adjustment elastic member 43 can also be a disc spring or other similar components.

[0053] Furthermore, the elastic force of the adjusting elastic member 43 can be adjusted in the following manner. Figure 4 For a single adjustment component, the adjustment component may further include an adjustment nut 44, and the adjustment nut 44 is threadedly connected to the accommodating groove 41. At this time, the adjustment elastic member 43 is arranged between the support member 42 and the adjustment nut 44, and the two ends of the adjustment elastic member 43 are respectively connected to the support member 42 and the adjustment nut 44.

[0054] In this way, by screwing the adjusting nut 44 , the distance between the adjusting nut 44 and the supporting member 42 can be adjusted, thereby adjusting the elastic force of the adjusting elastic member 43 , and the operation is simple and convenient.

[0055] It is understandable that in some embodiments of the present application, the end of the receiving groove 41 facing the corresponding pressing portion can be set to a stepped structure, specifically, the receiving groove 41 includes a first groove section close to the corresponding pressing portion and a second groove section connected to the first groove section, and the inner diameter of the first groove section is smaller than the inner diameter of the second groove section. Correspondingly, the support member 42 includes a first support portion and a second support portion connected in sequence, wherein the outer diameter of the first support portion is adapted to the inner diameter of the first groove section and is accommodated in the first groove section, and the outer diameter of the second support portion is adapted to the second groove section and is accommodated in the second groove section. Through the above arrangement, when the adjusting nut 44 is screwed to reduce the spacing between the adjusting nut 44 and the support member 42, the support member 42 in the initial position cannot move in the direction of the corresponding pressing portion, thereby preventing the support member 42 in the initial position from being ejected out of the receiving groove 41 by the adjusting elastic member 43, so as to smoothly adjust the elastic force of the adjusting elastic member 43. The initial position of the support member 42 mentioned above refers to the 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, Figure 4 Of course, in other embodiments of the present application, a limiting portion may be provided in the receiving groove 41 to directly limit the support member 42 in the initial position from moving in the direction of the corresponding pressing portion.

[0056] In some embodiments of the present application, the actuating assembly for driving the flow path corresponding to the compression hose 20 of the first clamping portion 31 and the second clamping portion 32 to alternately clamp can be roughly the same as the method adopted by the rocker arm solenoid valve listed in the background technology of the present application, that is, the rocker arm mechanism of the known rocker arm solenoid valve can be adopted as the actuating assembly.

[0057] Specifically, the actuation assembly may include a rocker arm 33. Figure 3 and Figure 4As shown in the figure, the rocker arm 33 is pivotally connected to the valve seat 10 via a rotating shaft, so that the rocker arm 33 can swing left and right relative to the valve seat 10, and the first pressing portion 31 and the second pressing portion 32 are both arranged on the same side of the rocker arm 33. In this way, when the rocker arm 33 swings left and right relative to the valve seat 10, the first pressing portion 31 and the second pressing portion 32 can be driven by the rocker arm 33 to alternately press the flow path corresponding to the hose 20. Among them, the first pressing portion 31, the second pressing portion 32 and the rocker arm 33 can be an integrated structure. Of course, in other embodiments of the present application, the first pressing portion 31 and the second pressing portion 32 can also be independent components connected to the rocker arm 33.

[0058] It is understandable that, in actual implementation, the rocker arm 33 can be disposed in the first valve body 11 of the valve seat 10, and the adjustment assembly 40, specifically the accommodating groove 41, can be disposed in the second valve body 12 of the valve seat 10, thereby making the structure of the entire rocker arm type clamp valve more compact.

[0059] Furthermore, in order to realize the left and right swing of the rocker arm 33, continue to refer to Figure 3 and Figure 4 The actuating assembly may further include a sliding portion 34, which is slidably disposed in the first valve body 11 of the valve seat 10, and the sliding portion 34 is located on the side of the rocker arm 33 away from the first clamping portion 31 and the second clamping portion 32. At the same time, the sliding portion 34 is provided with a first protrusion 35 that can abut against the rocker arm 33 and is aligned with the first clamping portion 31, and the sliding portion 34 on the same side as the first protrusion 35 is also provided with a sliding groove, and a first elastic member 36 and a second protrusion 37 are provided in the sliding groove, and the second protrusion 37 is slidably elastically retained in the sliding groove by the first elastic member 36, and the second protrusion 37 can abut against the rocker arm 33 and is aligned with the second clamping portion 32.

[0060] In this way, when the sliding portion 34 applies pressure to the rocker arm 33, the first protrusion 35 on the sliding portion 34 will directly press against the end of the rocker arm 33 provided with the first clamping portion 31. At this time, there is a hard contact between the first protrusion 35 and the rocker arm 33; and the second protrusion 37 will retract into the sliding groove when contacting the end of the rocker arm 33 provided with the second clamping portion 32, so that the first elastic member 36 is compressed, and there is a soft contact between the second protrusion 37 and the rocker arm 33. At this time, the pressure on the end of the rocker arm 33 provided with the first clamping portion 31 is greater than that on the end of the rocker arm 33 provided with the second clamping portion 32, so that the rocker arm 33 will swing to the right and drive the first clamping portion 31 to clamp the first flow path 21 of the hose 20.

[0061] On the contrary, when the sliding portion 34 does not apply pressure to the rocker arm 33, the first protrusion 35 will no longer contact the rocker arm 33 or will be in soft contact with the rocker arm 33, and the end of the rocker arm 33 provided with the first clamping portion 31 will no longer be pressurized. At this time, the first elastic member 36 located in the sliding groove will release the elastic force to force the second protrusion 37 to press against the end of the rocker arm 33 provided with the second clamping portion 32. The end of the rocker arm 33 provided with the second clamping portion 32 is pressurized, so that the rocker arm 33 swings to the left and drives the second clamping portion 32 to clamp the second flow path of the hose 20.

[0062] On this basis, in order to realize the sliding of the sliding portion 34 inside the valve seat 10, so as to apply pressure to the rocker arm 33 or release the pressure applied to the rocker arm 33 through the sliding portion 34, as shown in FIG. Figure 3 As shown, the actuating assembly may further include a housing 38, a moving iron core 39, a second elastic member 310, and a magnetic unit. The housing 38 is disposed on one side of the first valve body 11 of the valve seat 10, specifically, on the side of the first valve body 11 away from the second valve body 12. The moving iron core 39 is received in the housing 38 and connected to the sliding portion 34. The second elastic member 310 is sleeved on the outer wall of the moving iron core 39. The two ends of the second elastic member 310 are respectively connected to the moving iron core 39 and the housing 38, and the elastic force of the second elastic member 310 is greater than the elastic force of the first elastic member 36. Both the first elastic member 36 and the second elastic member 310 may be straight springs.

[0063] The magnetic unit is configured to apply an electromagnetic force to the moving iron core 39 to force the moving iron core 39 to move in a direction away from the valve seat 10, so as to drive the sliding part 34 away from the rocker arm 33 through the moving iron core 39. Furthermore, the magnetic unit further includes a static iron core 311, a coil frame 312, and a coil 313. The static iron core 311 is accommodated in the housing 38 and is arranged opposite to the moving iron core 39. The coil 313 is wound in the housing 38 through the coil frame 312, and the coil 313 is arranged around the moving iron core 39 and the static iron core 311.

[0064] In this way, when the coil 313 is energized, an electromagnetic force will be generated. At this time, the moving iron core 39 will tend to move toward the static 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 moving iron core 39 will overcome the elastic force of the second elastic member 310 and move toward the static iron core 311. At this time, the second elastic member 310 is compressed to pre-store an elastic force, and the moving iron core 39 drives the sliding part 34 to move synchronously in the direction of the static iron core 311, so that the first protrusion 35 of the sliding part 34 cancels the pressure applied to the end of the rocker arm 33 provided with the first clamping part 31, and the rocker arm 33 will swing to the left.

[0065] On the contrary, when the coil 313 is de-energized, the electromagnetic force acting on the moving iron core 39 gradually weakens until it disappears. During this process, the second elastic member 310 will release the pre-stored elastic force, thereby forcing the moving iron core 39 to drive the sliding part 34 to move in the direction of the rocker arm 33. Since the elastic force of the second elastic member 310 is greater than the elastic force of the first elastic member 36, sufficient pressure can be applied to the end of the rocker arm 33 where the first clamping part 31 is provided through the first protrusion 35 of the sliding part 34, thereby causing the rocker arm 33 to swing to the right.

[0066] On this basis, in order to facilitate the installation of the relevant components inside the housing 38 and facilitate the maintenance and repair of the relevant components inside the housing 38 in the later stage, combined with Figure 3 As shown in the figure, a detachable back cover 314 can also be provided at one end of the housing 38 that is aligned with the static iron core 311 .

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rocker arm type pinch valve, characterized in that: include: Valve seat; a hose, which is received in the valve seat and defines a first flow path, a second flow path, and a third flow path communicating with the first flow path and the second flow path; The opening and closing mechanism comprises a first pressing part, a second pressing part and an actuating assembly; the first pressing part is aligned with the first flow path of the hose, the second pressing part is aligned with the second flow path of the hose, and the actuating assembly is configured to drive the first pressing part and the second pressing part to alternately press the flow path corresponding to the hose, so that the first flow path and the second flow path are alternately opened and closed; as well as, Two adjustment components, corresponding to the first pressing part and the second pressing part respectively; the adjustment components include: An accommodating groove is provided on the valve seat and is arranged opposite to the corresponding pressing portion; A support member is disposed in the receiving groove and forms a gap with the corresponding pressing portion for accommodating the flow path corresponding to the hose; the support member is configured to be able to move in the receiving groove in a direction away from the corresponding pressing portion; The adjusting elastic member is connected to the supporting member and is used to elastically retain the supporting member in the containing groove; the elastic force of the adjusting elastic member is adjustable.

2. The rocker arm pinch valve according to claim 1, characterized in that: The adjustment assembly also includes an adjustment nut, which is threadedly connected to the accommodating groove. The adjustment elastic member is arranged between the support member and the adjustment nut, and two ends of the adjustment elastic member are respectively connected to the support member and the adjustment nut.

3. The rocker arm pinch valve according to claim 1 or 2, characterized in that: The valve seat comprises a first valve body and a second valve body which are arranged opposite to each other. The first valve body and the second valve body are detachably connected to each other, and the hose is received between the first valve body and the second valve body.

4. The rocker arm pinch valve according to claim 1 or 2, characterized in that: The first flow path, the second flow path and the third flow path are each provided with a joint extending to the outside of the valve seat.

5. The rocker arm pinch valve according to claim 4, characterized in that: Ports of the first flow path, the second flow path, and the third flow path are all provided with connecting parts, and the connector is detachably connected to the corresponding connecting part.

6. The rocker arm pinch valve according to claim 1 or 2, characterized in that: The actuating assembly includes a rocker arm, which is pivotally connected to the valve seat so that the rocker arm can swing left and right relative to the valve seat, and the first pressing portion and the second pressing portion are both arranged on the same side of the rocker arm.

7. The rocker arm pinch valve according to claim 6, characterized in that: The actuating assembly further comprises a sliding portion; the sliding portion is slidably disposed in the valve seat and is located at a side of the rocker arm away from the first pressing portion and the second pressing portion; The sliding portion is provided with a first protrusion that can abut against the rocker arm and align with the first clamping portion. A sliding groove is provided on the sliding portion on the same side as the first protrusion. A first elastic member and a second protrusion are provided in the sliding groove. The second protrusion is elastically retained in the sliding groove by the first elastic member, and the second protrusion can abut against the rocker arm and align with the second clamping portion.

8. The rocker arm pinch valve according to claim 7, characterized in that: The actuating assembly further includes a housing, a moving iron core, a second elastic member and a magnetic unit, wherein the housing is disposed on one side of the valve seat, the moving iron core is received in the housing and connected to the sliding portion, the second elastic member is sleeved on an outer wall of the moving iron core, two ends of the second elastic member are respectively connected to the moving iron core and the housing, and the elastic force of the second elastic member is greater than the elastic force of the first elastic member; The magnetic unit is configured to apply an electromagnetic force to the moving iron core, forcing the moving iron core to move in a direction away from the valve seat, so as to drive the sliding portion to move away from the rocker arm through the moving iron core.

9. The rocker arm pinch valve according to claim 8, characterized in that: The magnetic unit includes a static iron core, a coil frame and a coil. The static iron core is accommodated in the shell and arranged opposite to the moving iron core. The coil is wound in the shell through the coil frame, and the coil is arranged around the moving iron core and the static iron core.

10. The rocker arm pinch valve according to claim 9, characterized in that: A detachable rear cover is provided at one end of the shell that is aligned with the static iron core.

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