CN218761493U

CN218761493U - Switch valve and valve core component thereof

Info

Publication number: CN218761493U
Application number: CN202223020060.9U
Authority: CN
Inventors: 韩庆红
Original assignee: Shanghai Vico Precision Molding Co ltd
Current assignee: Shanghai Vico Precision Molding Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-03-28
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses a switch valve for the circulation condition of control fluid, the switch valve includes a valve body, a control assembly, at least one elastic component and a case component, the valve body has a first runner and a second runner, the valve body still has an installation space, an import and a valve port, the case component includes a accuse subassembly and at least one balanced structure, accuse subassembly includes a band shift piece and a sealing member, the elastic component is set up and can take to shift to reset under the circumstances that the control assembly is not driven and control the subassembly and exert preset pressure to accuse subassembly, when accuse subassembly was installed in the installation space, balanced structure was set up and is allowed the fluid through the import to pass through. The utility model discloses can control the condition of fluidic circulation, utilize this kind of simple design in hole or groove on the basis that need not extra limit structure, form fluid pressure balance fast in inside for the ooff valve is transformed into the cladding stage by the filler stage fast, shortens to pack the stage long, reduces the probability that the fluid leaked in the filler stage.

Description

Switch valve and valve core component thereof

Technical Field

The utility model relates to a valve especially relates to ooff valve and case component thereof.

Background

The valve is a pipeline auxiliary part for opening and closing a pipeline, controlling the flow direction, and adjusting and controlling parameters of a conveying medium. The valves are various in types, when most of the valves are designed, the valve core part is inserted into a flow channel of the valve body and blocks the valve port so as to divide the flow channel into an inlet flow channel and an outlet flow channel, the valve core is moved out of the valve port so as to be communicated with the inlet flow channel and the outlet flow channel, and the valve core is reset by the elasticity of the spring when external force disappears. In this design, the rest of the valve core is installed outside the valve body, so it can be seen that this valve is bulky, occupies a large space, and is not suitable for a narrow space environment.

Therefore, when some valves are designed, the size of the valve is reduced by installing the whole valve core in the flow passage of the valve body, and in addition, in order to limit the moving direction of the valve core and reduce the weight of the valve, a limit structure is not additionally arranged, but the valve core is limited by the inner wall of the valve body.

When the valve is not opened, fluid enters the space where the valve core is positioned through the access flow channel, and a gap between the valve core and the inner wall of the valve body is filled to enable the valve core to be in a fluid coating state. In the process, the pressure of the fluid acting on the valve core is gradually increased, the pressure direction of the spring acting on the valve core is opposite to the fluid pressure direction, if the elasticity of the spring is small, even if the pressure preset by the spring is higher than the pressure of the spring acting on the valve core, the valve core cannot be kept in the valve port and moves to connect the inlet flow channel and the outlet flow channel, so that the valve core cannot keep sealing the valve port at the initial stage of the fluid flowing through, and the fluid is leaked; if the spring has a large elasticity and a predetermined pressure, the valve element can be kept to block the valve port against the fluid pressure, but a larger driving force is required when the valve element is moved to communicate the inlet flow passage and the outlet flow passage.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an advantage lies in providing ooff valve and case component thereof, the utility model discloses can control the condition of fluidic circulation, utilize this kind of simple design in hole or groove on the basis that need not extra limit structure, form fluid pressure balance fast in inside for the ooff valve is changed into the cladding stage by the filler stage fast, and it is long when shortening the filler stage, reduces the probability that the fluid leaked at the filler stage.

The utility model discloses an advantage lies in providing ooff valve and case component thereof, the utility model discloses utilize less elasticity can reset, can effectively avoid leading to unable the condition of resetting or locking dead appearance because the pressure differential when resetting is too big.

The utility model discloses an advantage lies in providing ooff valve and case component thereof, the utility model discloses when using, require lowly to elasticity, correspondingly, required drive power is also smaller when controlling the fluid circulation.

In order to achieve the utility model discloses above at least one advantage, the utility model provides a ooff valve for the circulation condition of control fluid, the ooff valve includes:

a valve body having a first flow passage for introducing the fluid and a second flow passage for discharging the fluid, the valve body further having an installation space, an inlet communicating the installation space with the first flow passage, and a valve port communicating the installation space with the second flow passage;

a control component which is used for controlling the operation of the device,

at least one elastic member installed in the installation space;

a spool member mounted to the mounting space, the spool member comprising:

a flow control assembly including a belt moving member controllably connected to the control assembly and a sealing member, the belt moving member being capable of being driven by the control assembly to move close to or away from the valve port and disposed in the installation space, the sealing member being installed at an end of the belt moving member close to the valve port, the sealing member being capable of being driven by the belt moving member to move in or out of the valve port to open or close the installation space and the second flow passage, the sealing member being shaped to fit the valve port, an elastic member being installed between the flow control assembly and an inner wall of the installation space, the elastic member being capable of being elastically deformed when the flow control assembly moves away from the valve port, the elastic member being configured to reset the flow control assembly without being driven by the control assembly and apply a predetermined pressure to the flow control assembly so that the sealing member is deformed and closely attached to the inner wall of the valve port;

at least one balancing structure formed in the band and extending between the seal and an end of the band remote from the seal, the balancing structure being configured to allow passage of the fluid through the inlet when the flow control assembly is mounted in the mounting space.

According to an embodiment of the present invention, the flow control assembly further comprises a connecting structure, and the sealing member is detachably connected to the belt moving member through the connecting structure.

According to the utility model discloses an embodiment, the area moves the piece and has a mounting groove, the mounting groove set up in the area moves the piece and keeps away from the one end of sealing member, the mounting groove is used for installing the elastic component.

According to the utility model discloses an embodiment the subassembly is flowed in the accuse is installed in during installation space, at least one balanced structure is set up can the accuse flow the subassembly remove around all with the import intercommunication.

According to an embodiment of the present invention, an inner wall of the installation space away from the valve port is defined as a top wall, the valve element further includes at least one anti-lock structure, the anti-lock structure is arbitrarily installed on the belt moving member and the top wall, when the flow control assembly is driven along the installation space to move in a direction away from the valve port and approach the top wall, the anti-lock structure separates the belt moving member from the top wall to allow the fluid to be filled between the belt moving member and the top wall and to apply a reverse fluid pressure to the belt moving member in a direction same as a pressure applying direction of the elastic member, and the belt moving member overcomes the fluid pressure applied to the belt moving member from the valve port without being driven by the driving force, so that the belt moving member moves along the installation space to approach the valve port and is blocked by the sealing member.

According to the utility model discloses an embodiment, anti-lock structure be implemented set up in the lug on roof surface the accuse is flowed the subassembly and is driven and follow installation space is in order to keep away from after the direction of valve port removes, the area move the piece with the roof the lug butt.

According to an embodiment of the present invention, the anti-lock structure is implemented as set up in the area move the piece keep away from a sealing member tip and to the lug that the roof extends the accuse is flowed the subassembly and is driven and is followed installation space is in order to keep away from after the direction of valve port removes, the area move the piece surface the lug with the roof butt.

According to the utility model discloses an embodiment, control assembly includes a coil and one touches and moves the piece, the coil is set up can the circular telegram, touch move the piece by magnetizable connect in the coil, the area move the piece by set up can receive touch the magnetic attraction effect that moves the piece and follow installation space is in order to keep away from the direction of valve port removes.

According to the utility model discloses an embodiment, the ooff valve still includes a casing, the coil is installed in the casing, just touch move the piece install in the casing, the outer wall of casing is non-metallic material, the inner wall of casing is magnetic materials.

In order to achieve the above at least one advantage of the present invention, the present invention provides a valve element, the valve element is connected with an elastic member with a predetermined pressure and integrally installed in an installation space of a valve body, the valve body has a first flow channel and a second flow channel, the first flow channel is used for guiding fluid, the second flow channel is used for guiding fluid, the valve body further has an inlet and a valve port, the inlet is to the installation space with the first flow channel intercommunication, the valve port is to the installation space with the second flow channel intercommunication, will the installation space is kept away from an inner wall definition of the valve port is a roof, the valve element can be driven and followed the installation space immigration or shift out the valve port is with disconnection or connection the installation space with the second flow channel, the valve element includes:

a flow control assembly, comprising a belt moving member and a sealing member, wherein the belt moving member can be driven to move close to or away from the valve port and is arranged in the installation space, the sealing member is installed at one end of the belt moving member close to the valve port, the sealing member can be driven by the belt moving member to move in or out of the valve port so as to disconnect or connect the installation space and the second flow passage, the shape of the sealing member is adapted to the valve port, the belt moving member drives the elastic member to generate elastic deformation when being driven away from the valve port, and the belt moving member is reset by the elastic member under the condition of no driving force so that the sealing member blocks the valve port;

at least one balancing structure formed in the band and extending between the seal and an end of the band remote from the seal, the balancing structure being configured to allow passage of the fluid through the inlet when the flow control assembly is mounted in the mounting space;

at least one anti-lock structure mounted to the belt-moving member, the anti-lock structure moving the belt-moving member closer to the valve port along the mounting space and blocking the valve port by the sealing member when the flow control assembly is driven to move along the mounting space in a direction away from the valve port and closer to the top wall by spacing the belt-moving member from the top wall to allow the fluid to fill between the belt-moving member and the top wall and applying a reverse fluid pressure to the belt-moving member in a direction same as the pressing direction of the elastic member, the belt-moving member, in the absence of the driving force, moving the belt-moving member closer to the valve port along the mounting space and blocking the valve port by the sealing member by the reverse fluid pressure applied to the belt-moving member and the pressure applied by the elastic member overcoming the fluid pressure at the valve port.

Drawings

Fig. 1 shows a schematic structural diagram of the switching valve of the present invention.

Fig. 2 shows the cross-sectional view of the switching valve according to the invention before its movement.

Fig. 3 shows the sectional view of the switch valve according to the invention after movement.

Fig. 4 shows a structural perspective view of the valve element member of the present invention.

Fig. 5 shows a structural perspective view of the valve element member of the present invention at another viewing angle.

Detailed Description

The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 3, a switching valve for controlling the flow of fluid according to a preferred embodiment of the present invention will be described in detail below. The fluid is embodied as a liquid or gaseous substance.

The switching valve includes a valve body 100, and the valve body 100 has a first flow passage 101 and a second flow passage 102, the first flow passage 101 is used for leading in the fluid, and the second flow passage 102 is used for leading out the fluid.

The valve body 100 further has an installation space 103, an inlet 104, and a valve port 105, wherein the inlet 104 connects the installation space 103 and the first flow passage 101, and the valve port 105 connects the installation space 103 and the second flow passage 102. An inner wall of the installation space 103 away from the valve port 105 is defined as a top wall 110.

Referring to fig. 2 to 5, the switching valve further includes a valve core member 200, and the valve core member 200 is installed in the installation space 103. The poppet member 200 further includes a flow control assembly 210, the flow control assembly 210 being movably mounted to the mounting space 103, and the flow control assembly 210 being configured to move toward or away from the valve port 105 along the mounting space 103. When the flow control assembly 210 moves along the installation space 103 to close to the valve port 105 to block the valve port 105, the flow control assembly 210 blocks the installation space 103 from the second flow passage 102 to block the first flow passage 101 from introducing the fluid into the second flow passage 102 through the installation space 103; when the flow control assembly 210 moves along the installation space 103 away from the valve port 105 to move out of the valve port 105, the installation space 103 is communicated with the second flow channel 102, and the first flow channel 101 introduces the fluid into the second flow channel 102 through the installation space 103, so as to realize flow control.

It is worth mentioning that while the flow control assembly 210 moves in the installation space 103 to open or close the valve port 105, the installation space 103 has a function of defining a moving direction for the flow control assembly 210. In addition, the valve core member 200 is integrally installed in the installation space 103, so that the overall structure is compact and the occupation of the external space is reduced.

The flow control assembly 210 includes a belt 211 and a sealing element 212, the belt 211 is movably disposed in the installation space 103 near or far from the valve port 105, the sealing element 212 is installed at an end of the belt 211 near the valve port 105, and the sealing element 212 can be moved into or out of the valve port 105 by the belt 211. The shape of the sealing element 212 is adapted to the valve port 105, and the sealing element 212 can be deformed by an external force to fit the inner wall of the valve port 105, so as to realize zero leakage.

Preferably, the seal 212 is implemented as a rubber material.

The flow control assembly 210 further includes a connecting structure 213, and the sealing member 212 is removably coupled to the tape displacement member 211 via the connecting structure 213.

As such, different specifications of the seal 212 may be selected based on the actual size of the valve port 105 to meet the actual usage requirements. And in the case that the quality of the sealing member 212 is damaged due to long-term use, the sealing member 212 can be continuously used by replacing the sealing member 212.

The connecting structure 213 comprises a screw 2131 and a screw hole 2132 which is matched with the screw 2131 in size, either the belt shift piece 211 or the sealing piece 212 is provided with the screw 2131, and the other forms the screw hole 2132, and the belt shift piece 211 is connected to the sealing piece 212 through the threaded fit between the screw 2131 and the screw hole 2132.

Preferably, the screw 2131 is installed on the sealing member 212, the screw 2132 is formed on the displacement member 211, and the sealing member 212 is screwed into the screw 2132 through the screw 2131 to connect with the displacement member 211.

The screw 2131 is attached to the belt 211 in a deformable manner, the screw 2132 is formed in the seal 212, and the seal 212 is screwed onto the screw 2131 to be connected to the outer side of the belt 211.

Referring to fig. 2 to 3, the switching valve further includes at least one elastic member 300, the elastic member 300 is installed between the flow control assembly 210 and the inner wall of the installation space 103, the elastic member 300 is configured to be elastically deformed when the flow control assembly 210 moves away from the valve port 105, and the elastic member 300 is configured to reset the flow control assembly 210 and apply a predetermined pressure to the flow control assembly 210 to deform the sealing member 212 and tightly adhere to the inner wall of the valve port 105 when the belt moving member 211 is not driven, so as to achieve zero leakage.

Further, the belt shifting element 211 is provided with a mounting groove 21101, the mounting groove 21101 is arranged at one end of the belt shifting element 211 far away from the sealing element 212, and the mounting groove 21101 is used for mounting the elastic element 300. Thus, the whole structure is compact.

Preferably, the elastic member 300 is implemented as a spring.

It is worth mentioning that the switch valve defines a filling stage, when the switch valve is in the filling stage, the flow control assembly 210 is not covered by the fluid in the installation space 103, and the flow control assembly 210 is subjected to the pressure exerted by the elastic member 300 and the fluid pressure at the same time, and the two acting forces are opposite. The switching valve defines a coating stage in which the flow control assembly 210 is coated with the fluid in the installation space 103, and the pressure of the elastic member 300 acting on the flow control assembly 210 and the fluid pressure of the fluid implemented as a liquid substance acting on the flow control assembly 210 are in the same direction. If the elastic force of the elastic member 300 is small, the fluid pressure is gradually increased during the filling stage, and once the fluid pressure applied to the flow control assembly 210 is greater than the pressure applied to the flow control assembly 210 by the elastic member 300, the sealing member 212 cannot effectively block the valve port 105, so that the fluid leaks; if the elastic force of the elastic member 300 is large, the pressure applied by the elastic member 300 on the flow control assembly 210 is always larger than the fluid pressure, so that the fluid leakage can be avoided, but when controlling the fluid flow, a larger driving force needs to be provided to control the flow control assembly 210 to move along the installation space 103 away from the valve port 105.

Referring to fig. 4-5, further, the poppet member 200 further includes at least one balance structure 220, the balance structure 220 being formed on the band 211, and the balance structure 220 extending between the seal 212 and an end of the band 211 remote from the seal 212. When the flow control assembly 210 is installed in the installation space 103, the balancing structure 220 is configured to allow the fluid passing through the inlet 104 to pass through, so that the fluid quickly fills the gap between the installation space 103 and the belt displacement member 211, thereby achieving quick balancing of the fluid pressure in the installation space 103.

Preferably, the balancing structures 220 are provided in four and equally spaced intervals to improve the efficiency of filling the gap between the installation space 103 and the belt shifter 211 with the fluid.

Preferably, when the flow control assembly 210 is installed in the installation space 103, at least one of the balance structures 220 is configured to communicate with the inlet 104 before and after the flow control assembly 210 moves, so that the fluid entering from the inlet 104 can rapidly fill the gap between the flow control assembly 210 and the installation space 103 through the balance structure 220.

Preferably, the balancing structure 220 is implemented as a groove formed on the surface of the belt moving member 211.

The compensation structure 220 is embodied as a through-hole formed in the belt displacement element 211 in a deformable manner.

As such, with the balancing structure 220, the on-off valve can be quickly transitioned from the packing phase to the packing phase, reducing the chance of leakage from the packing phase. Meanwhile, the limiting effect of the installation space 103 on the flow control assembly 210 is not affected, the requirement on the elastic member 300 is also reduced, and the exquisite design is achieved through a simple structure.

Referring to fig. 2 to 5, the spool member 200 further includes at least one anti-lock structure 230, and the anti-lock structure 230 is arbitrarily installed to the belt mover 211 and the top wall 110. When the flow control assembly 210 is driven to move along the installation space 103 in a direction away from the valve port 105 and close to the top wall 110, the anti-lock structure 230 allows the fluid to fill between the band 211 and the top wall 110 by separating the band 211 and the top wall 110 and applies a reverse fluid pressure to the band 211 in the same direction as the pressure applied by the elastic member 300. When the belt shifting element 211 is not driven, the fluid pressure acting on the belt shifting element 211 and the pressure exerted by the elastic element 300 overcome the fluid pressure at the valve port 105 to the belt shifting element 211, so that the belt shifting element 211 moves along the installation space 103 to be close to the valve port 105 and blocks the valve port 105 by the sealing element 212. Therefore, the difficulty of resetting the flow control assembly 210 is reduced, easy resetting is realized, the requirement on the elastic piece 300 is reduced, and compared with the prior art, the situation that the flow control assembly 210 cannot be reset or locked is effectively avoided.

Preferably, the anti-lock structure 230 is implemented as a protrusion disposed at an end of the belt moving member 211 away from the sealing member 212 and extending toward the top wall 110. After the flow control assembly 210 is driven to move along the installation space 103 in a direction away from the valve port 105, the protrusion on the surface of the belt moving member 211 abuts against the top wall 110.

The anti-lock structure 230 is implemented as a protrusion disposed on the surface of the top wall 110 in a deformable manner. After the flow control assembly 210 is driven to move along the installation space 103 in a direction away from the valve port 105, the belt moving member 211 abuts against the protrusion of the top wall 110.

Further, the switch valve further comprises a control assembly 400, the belt-moving member 211 is controllably connected to the control assembly 400, and the belt-moving member 211 can be driven by the control assembly 400 to move along the installation space 103 in a direction away from the valve port 105.

The control assembly 400 includes a coil 410 and a contacting member 420, the coil 410 is configured to be energized, the contacting member 420 is coupled to the coil 410 in a magnetizable manner, and the belt moving member 211 is configured to be moved along the installation space 103 in a direction away from the valve port 105 by a magnetic attraction of the contacting member 420.

Preferably, the tactile displacement member 420 is implemented as a soft magnetic material, and the belt displacement member 211 is implemented as a magnetically attractive material. The touch shifter 420 is installed at one end of the band shifter 211 away from the sealing member 212 and outside the valve body 100.

The switching valve defines a start-up phase, the switching valve being configured to transition from the coating phase to the start-up phase. When the switch valve is in the starting phase, the coil 410 is energized to magnetize the touch and move part 420, and at this time, the belt and move part 211 is subjected to the magnetic attraction force of the touch and move part 420, and is simultaneously subjected to the pressure applied by the elastic part 300 and the fluid pressure of the fluid implemented as a liquid substance, and the magnetic attraction force generated by the touch and move part 420 can overcome the pressure and the fluid pressure applied by the elastic part 300, so as to ensure that the flow control assembly 210 can be driven to move away from the valve port 105, so as to achieve the discharge of the fluid.

It can be seen that the elastic force of the elastic member 300 is small, and accordingly, the electromagnetic force for driving the belt moving member 211 to move is also small, so that the electromagnetic force as small as possible, i.e., the flow can be controlled.

The on-off valve further defines a closed phase, the on-off valve being configured to switch between the activation phase and the closed phase. When the switch valve is in the closed stage, the coil 410 is de-energized, the touch-shift member 420 loses magnetism, and then the counter fluid pressure acting on the belt-shift member 211 and the pressure exerted by the elastic member 300 overcome the fluid pressure at the valve port 105 toward the belt-shift member 211, and the flow control assembly 210 is moved into the valve port 105 by the reset action of the elastic member 300 to suspend the discharge of the fluid.

The switch valve further comprises a housing 500, the coil 410 is installed in the housing 500, the touch moving member 420 is installed in the housing 500, the outer wall of the housing 500 is made of a non-metal material, and the inner wall of the housing 500 is made of a magnetic conductive material.

A method of operating a switching valve is proposed, comprising the steps of:

(A) The first flow passage 101 introduces the fluid into the installation space 103 through the inlet 104, and the fluid rapidly wraps the flow control assembly 210 in the installation space 103 through the balance structure 220, so that the switching valve is rapidly changed from the packing stage to the wrapping stage;

(B) The control assembly 400 is operated, and the force applied to the belt moving member 211 by the control assembly 400 overcomes the pressure applied to the belt moving member 211 by the elastic member 300 and the fluid pressure applied to the belt moving member 211, so that the control assembly 400 can control the flow control assembly 210 to move along the installation space 103 away from the valve port 105, and the switch valve is in the start-up stage;

(C) The control module 400 stops operating, the pressure applied to the belt moving member 211 by the elastic member 300 and the fluid pressure applied to the belt moving member 211 by the fluid pressure overcome to the belt moving member 211, and the flow control module 210 moves into the valve port 105 by the return action of the elastic member 300, and the on-off valve is in the closed stage.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The advantages of the present invention are complete and effective. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A switching valve for controlling a flow of a fluid, the switching valve comprising:

a control component which is used for controlling the operation of the device,

at least one elastic member installed in the installation space;

a spool member mounted to the mounting space, the spool member comprising:

2. The switch valve of claim 1, wherein the flow control assembly further comprises a connecting structure by which the sealing member is removably connected to the band displacement member.

3. The switch valve of claim 1, wherein the tape moving member has a mounting groove provided at an end of the tape moving member remote from the sealing member, the mounting groove being for mounting the elastic member.

4. The switching valve of claim 1, wherein at least one of the balance structures is configured to communicate with the inlet before and after the flow control assembly is moved when the flow control assembly is installed in the installation space.

5. The switching valve as claimed in any one of claims 1 to 4, wherein an inner wall of the installation space remote from the valve port is defined as a top wall, the spool member further comprising at least one anti-lock structure installed arbitrarily to the band-moving member and the top wall, the anti-lock structure moving the band-moving member closer to the valve port along the installation space and blocking the valve port by the sealing member by separating the band-moving member from the top wall to allow the fluid to be filled between the band-moving member and the top wall and applying a reverse fluid pressure to the band-moving member in a direction same as a pressing direction of the elastic member when the flow control assembly is driven along the installation space to move in a direction away from the valve port and closer to the top wall, the band-moving member being driven without a driving force by a reaction fluid pressure acting on the band-moving member and a pressure applied by the elastic member to move the band-moving member closer to the valve port and block the valve port by the sealing member.

6. The switching valve of claim 5, wherein the anti-lock structure is implemented as a protrusion disposed on a surface of the top wall, and the band moving member abuts against the protrusion of the top wall after the flow control assembly is driven to move along the installation space in a direction away from the valve port.

7. The switch valve of claim 5, wherein the anti-lock structure is implemented as a protrusion disposed at an end of the band moving member away from the sealing member and extending toward the top wall, the protrusion of the band moving member surface abutting the top wall after the flow control assembly is driven to move along the installation space in a direction away from the valve port.

8. The switch valve of claim 1, wherein the control assembly includes a coil and a displacement member, the coil is configured to be energized, the displacement member is magnetizable and connected to the coil, and the displacement member is configured to be magnetically attracted by the displacement member to move along the mounting space in a direction away from the valve port.

9. The switch valve of claim 8, further comprising a housing, wherein the coil is mounted within the housing, and wherein the trip member is mounted within the housing, wherein an outer wall of the housing is a non-metallic material and an inner wall of the housing is a magnetically conductive material.

10. A spool member connected to an elastic member of a predetermined pressure and integrally installed in an installation space of a valve body, the valve body having a first flow passage for introducing a fluid and a second flow passage for discharging the fluid, the valve body further having an inlet port communicating the installation space with the first flow passage and a valve port communicating the installation space with the second flow passage, an inner wall of the installation space away from the valve port defining a top wall, the spool member being capable of being driven to move in and out of the valve port along the installation space to disconnect or connect the installation space and the second flow passage, the spool member comprising: