Magnetic locking valve

Abstract

The utility model relates to the technical field of valves, and discloses a magnetic locking valve. The magnetic locking valve comprises a valve body, a valve cover, a valve rod assembly and a rotating cover, the valve rod assembly comprises a valve rod and a valve element, and the driving end of the valve rod penetrates through the valve cover; the driven end of the valve rod is connected to the valve element, the valve deck is rotatably sleeved with the rotary cover, a connecting part opposite to the driving end is arranged on the inner top wall of the rotary cover, and the rotary cover can move in the axis direction of the valve rod under the action of external force so that the connecting part and the driving end can be fixed in the circumferential direction. A containing groove annularly formed in the periphery of the valve rod is formed in the valve cover, and when the connecting part and the driving end are fixed in the circumferential direction, the connecting part can be partially contained in the containing groove. According to the magnetic locking valve, the size of the magnetic locking valve can be reduced to a certain extent, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a magnetic locking valve. Background Art

[0002] A locking valve is a valve that uses a special key to manually cut off or connect the flow of media in a pipeline. It can be widely used in various pipelines for liquid control. It can prevent the theft of liquid media and cut off water supply in the event of malicious arrears.

[0003] Most of the locking valves currently available on the market use magnetic locking valves, which rely on the action of magnetic force to control the locking and unlocking of the valve. In the related art, the magnetic locking valve usually includes a valve body, a valve cover and a valve stem assembly. A flow channel is arranged in the valve body, and the valve cover is arranged on the valve body. The valve stem assembly includes a valve stem and a valve core. One end of the valve stem is inserted into the valve cover; the other end of the valve stem is connected to the valve core, and the valve stem rotates to open and close the flow channel on the valve body. In order to realize the switching of the magnetic locking valve between the locked state and the unlocked state, the magnetic locking valve also includes a rotating cover, which is rotatably mounted on the valve body, and a connecting portion extending downward is arranged on the inner top wall of the rotating cover. Under the action of external force, the rotating cover can move axially so that the connecting portion is circumferentially fixed with the valve stem, so that when the rotating cover rotates, the valve stem can be driven to rotate synchronously, so that the valve core opens and closes the flow channel on the valve body. However, due to the setting of the connecting part, a large space needs to be reserved between the inner top wall of the rotating cover and the valve cover to realize the axial movement of the rotating cover and ensure that the connecting part and the valve stem can achieve relatively stable circumferential fixation, which results in the whole magnetic locking valve being larger in size and inconvenient to install.

[0004] Therefore, it is urgent to provide a magnetic lock valve to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a magnetic lock valve, which can reduce the volume of the magnetic lock valve to a certain extent and is easy to install.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] A magnetic locking valve comprises a valve body, a valve cover and a valve stem assembly, wherein a flow channel is arranged in the valve body, the valve cover is arranged on the valve body, the valve stem assembly comprises a valve stem and a valve core, the active end of the valve stem is penetrated through the valve cover; the driven end of the valve stem is connected to the valve core, the valve stem rotates to enable the valve core to open and close the flow channel, and the magnetic locking valve further comprises:

[0008] A rotating cover is rotatably sleeved on the valve cover, and a connecting portion opposite to the active end is provided on the inner top wall of the rotating cover. The rotating cover can move along the axial direction of the valve stem under the action of an external force, so that the connecting portion and the active end are circumferentially fixed;

[0009] The valve cover is provided with a receiving groove arranged around the valve stem. When the connecting portion and the active end are circumferentially fixed, the connecting portion can be partially received in the receiving groove.

[0010] As a preferred solution of the magnetic locking valve provided by the utility model, the connecting portion and the active end can be plug-fitted.

[0011] As a preferred solution of the magnetic locking valve provided by the utility model, the connecting portion is a connecting sleeve, and the connecting sleeve can be plugged with the active end.

[0012] As a preferred solution of the magnetic locking valve provided by the utility model, the active end includes a plug-in section and a guide section, the plug-in section is adapted to the inner hole of the connecting sleeve, the guide section is arranged at the top of the plug-in section, the guide section is accommodated in the inner hole of the connecting sleeve, and can rotate relative to the connecting sleeve.

[0013] As a preferred solution of the magnetic lock valve provided by the utility model, the guide section is a cylindrical structure.

[0014] As a preferred solution of the magnetic locking valve provided by the utility model, an abutment step is further provided on the valve stem, and when the connecting portion and the active end are circumferentially fixed, the connecting portion can abut against the abutment step.

[0015] As a preferred solution of the magnetic lock valve provided by the utility model, the magnetic lock valve further includes a magnetic limit assembly, and the magnetic limit assembly is telescopically arranged on the circumference of the valve cover;

[0016] When the magnetic locking valve is in a locked state, the magnetic limiting assembly extends to limit the movement of the rotating cover along the axial direction of the valve stem;

[0017] When the magnetic locking valve is in an unlocked state, the magnetic limiting assembly contracts under the action of an external magnetic force, so that the rotating cover can move along the axial direction of the valve stem, and the connecting portion and the active end are circumferentially fixed and can rotate synchronously.

[0018] As a preferred solution of the magnetic locking valve provided by the utility model, the valve cover is provided with at least two mutually spaced mounting grooves in the circumference, and the magnetic limit assembly is installed in each of the mounting grooves;

[0019] Each of the magnetic limiting assemblies includes a first magnetic steel and an elastic member, and the first magnetic steel is telescopically arranged in the installation groove through the elastic member.

[0020] As a preferred solution of the magnetic locking valve provided by the utility model, a first limiting step is further provided on the inner wall of the rotating cover, and when the magnetic locking valve is in a locked state, the first magnetic steel abuts against the first limiting step.

[0021] As a preferred solution of the magnetic locking valve provided by the utility model, the magnetic locking valve also includes a magnetic key that can be matched with the rotating cover, and the magnetic key can provide external magnetic force for the magnetic limit assembly and can provide external force for the rotating cover.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a magnetic lock valve. When the magnetic lock valve needs to be switched from a locked state to an unlocked state, the operator can apply a corresponding external force on the rotating cover to make it move along the axial direction of the valve stem, so that the connecting part and the active end of the valve stem are circumferentially fixed, and the rotation of the valve stem can drive the valve core to descend or rise, thereby cutting off or connecting the flow channel. By arranging a receiving groove on the valve cover, when the connecting part and the active end are circumferentially fixed, the receiving groove can partially accommodate the connecting part to ensure that the connecting part and the active end of the valve stem have sufficient matching depth, and at the same time reduce the distance between the inner top wall of the rotating cover and the valve cover, thereby reducing the volume of the entire magnetic lock valve to a certain extent, so that it is easy to install in a smaller space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the magnetic lock valve provided by the embodiment of the utility model in a locked state;

[0025] Figure 2 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the embodiment of the utility model in a locked state;

[0026] Figure 3 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the embodiment of the utility model in the unlocked state;

[0027] Figure 4 It is a structural schematic diagram of a rotating cover provided by an embodiment of the utility model;

[0028] Figure 5 It is a structural schematic diagram of a valve stem provided by an embodiment of the utility model;

[0029] Figure 6 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the embodiment of the utility model in the intermediate state;

[0030] Figure 7 It is a cross-sectional schematic diagram of the valve cover provided by the embodiment of the utility model;

[0031] Figure 8 It is a structural schematic diagram of a magnetic key provided by an embodiment of the utility model.

[0032] In the figure:

[0033] 100, valve body; 101, flow channel;

[0034] 200, valve cover; 201, receiving groove; 202, penetration hole; 203, limiting structure; 204, first sealing member; 205, mounting groove;

[0035] 300, valve stem assembly; 310, valve stem; 311, active end; 3111, plug section; 3112, guide section; 312, driven end; 313, abutment step; 320, valve core;

[0036] 400, rotating cover; 401, connecting portion; 402, step portion; 403, first limiting step;

[0037] 500, magnetic limit assembly; 510, first magnetic steel; 520, elastic member;

[0038] 600, magnetic key; 610, key body; 611, plug-in slot; 620, second magnetic steel;

[0039] 700, pressing sleeve; 701, limiting part. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] This embodiment provides a magnetic lock valve, which is used in various pipelines to cut off or connect the flow of media in the pipeline to prevent theft of liquid media and cut off water supply when there is malicious arrears. The magnetic lock valve can be a gate valve, a ball valve or other valves with a locking function, which is not specifically limited here.

[0045] Figure 1 A schematic structural diagram of the magnetic locking valve provided in this embodiment in a locked state is shown. Figure 2 FIG. 2 shows a cross-sectional schematic diagram of the magnetic lock valve provided in this embodiment in a locked state. Figure 1-Figure 2 As shown, the magnetic locking valve provided in this embodiment includes a valve body 100, a valve cover 200 and a valve stem assembly 300. A flow channel 101 is arranged in the valve body 100. Both ends of the flow channel 101 are used to connect to an external pipeline so that the liquid medium in the external pipeline can flow through the flow channel 101. The valve cover 200 is arranged on the valve body 100. The valve stem assembly 300 includes a valve stem 310 and a valve core 320. The active end 311 of the valve stem 310 is penetrated by the valve cover 200; the driven end 312 of the valve stem 310 is connected to the valve core 320, and the valve core 320 is located in the flow channel 101. By rotating the valve stem 310 in different directions around the axis, the valve core 320 can be lowered or raised, thereby cutting off or connecting the flow channel 101, realizing the cutoff or circulation of the liquid medium, thereby realizing the closing or opening of the magnetic locking valve.

[0046] In this embodiment, the valve stem 310 is threadedly connected to the valve core 320. The valve core 320 can be driven to move along the axial direction of the valve stem 310 by rotating the valve stem 310. The valve stem assembly 300 has a simple structure and is easy to prepare.

[0047] Optionally, the valve cover 200 is fixedly mounted on the valve body 100. In this embodiment, the valve cover 200 is threadedly connected to the valve body 100 and communicates with the flow channel 101 of the valve body 100.

[0048] like Figure 2 As shown, a through hole 202 is provided in the valve cover 200, and the through hole 202 extends along the axial direction of the valve cover 200, and the active end 311 of the valve stem 310 is rotatably installed in the through hole 202; a limiting structure 203 is provided at the bottom of the through hole 202, and the valve stem 310 is supported on the limiting structure 203 and can rotate relative to the limiting structure 203. The through hole 202 on the valve cover 200 facilitates the installation of the valve stem assembly 300, and the setting of the limiting structure 203 can prevent the valve stem assembly 300 from slipping out of the through hole 202. In this embodiment, the through hole 202 is a stepped hole, which can limit the upward movement of the valve stem assembly 300. The limiting structure 203 is a limiting nut, which is threadedly connected to the inner wall of the penetration hole 202. The valve stem assembly 300 is penetrated by the limiting nut. The second limiting step on the valve stem assembly 300 can abut against the limiting nut to limit the downward movement of the valve stem assembly 300 and prevent the valve stem assembly 300 from slipping out of the penetration hole 202.

[0049] To ensure the sealing between the valve stem 310 and the valve cover 200, a first sealing member 204 is provided between the valve stem 310 and the through hole 202. The provision of the first sealing member 204 can prevent the liquid medium from leaking from between the valve stem 310 and the through hole 202. In this embodiment, the first sealing member 204 is a rubber sealing ring.

[0050] In order to realize the switching of the magnetic lock valve between the locked state and the unlocked state, as shown in FIG. Figure 2As shown, the magnetic lock valve further includes a rotating cover 400, which is rotatably sleeved on the valve cover 200, and a connecting portion 401 opposite to the active end 311 is provided on the inner top wall of the rotating cover 400, and the rotating cover 400 can move along the axial direction of the valve stem 310 under the action of an external force, so that the connecting portion 401 and the active end 311 are circumferentially fixed. When it is necessary to switch the magnetic lock valve from the locked state to the unlocked state, the operator can apply a corresponding external force on the rotating cover 400 to make it move along the axial direction of the valve stem 310, so that the connecting portion 401 and the active end 311 of the valve stem 310 are circumferentially fixed, and the rotation of the valve stem 310 can drive the valve core 320 to descend or ascend, thereby cutting off or connecting the flow channel 101. However, due to the setting of the connecting portion 401, a large space needs to be reserved between the inner top wall of the rotating cover 400 and the valve cover 200 to realize the axial movement of the rotating cover 400 and ensure that the connecting portion 401 and the valve stem 310 can achieve relatively stable circumferential fixation, which results in a larger volume of the entire magnetic locking valve and is not convenient for installation.

[0051] Figure 3 FIG. 4 is a cross-sectional schematic diagram of the magnetic lock valve provided in this embodiment in an unlocked state. Figure 3 Combined with Figure 2 As shown, in this embodiment, the valve cover 200 is provided with a receiving groove 201 arranged around the valve stem 310, and when the connecting portion 401 and the active end 311 are circumferentially fixed, the connecting portion 401 can be partially accommodated in the receiving groove 201. The provision of the receiving groove 201 can provide an accommodating space for the connecting portion 401 to ensure that the connecting portion 401 and the active end 311 of the valve stem 310 have a sufficient matching depth, while reducing the distance between the inner top wall of the rotating cover 400 and the valve cover 200, thereby reducing the volume of the entire magnetic lock valve to a certain extent, so as to facilitate its installation in a smaller space.

[0052] Figure 4 A schematic structural diagram of a rotating cover 400 provided in this embodiment is shown. Figure 5 FIG. 3 is a schematic diagram showing the structure of the valve stem 310 provided in this embodiment. Figure 4-Figure 5 Combined with Figure 2 As shown, in order to realize synchronous rotation of the valve stem 310 when the rotating cover 400 rotates, the connecting portion 401 and the active end 311 are plugged together. When the connecting portion 401 and the active end 311 are plugged together, the two are circumferentially fixed. In one embodiment, the connecting portion 401 is a connecting sleeve, which can be plugged with the active end 311. The cross-sectional shape of the inner hole of the connecting sleeve is non-circular, and at least part of the active end 311 is adapted to the inner hole of the connecting sleeve to realize circumferential fixation of the two. When the connecting sleeve is plugged with the active end 311, the connecting sleeve rotates, which can drive the valve stem 310 to rotate.

[0053] In this embodiment, the inner hole of the connecting sleeve adopts an inner square structure, and the cross-section of the active end 311 of the valve stem 310 is a square structure, which can prevent the connecting sleeve and the valve stem 310 from relative rotation when the rotating cover 400 is screwed. It should be explained that the non-circular shape can be a polygon such as a triangle or a hexagon, or a regular figure formed by alternating straight lines and curves, or an irregular figure formed by straight lines and curves, or a regular or irregular figure formed by curves and curves. This embodiment does not limit this, as long as the connecting sleeve and the active end 311 that are plugged into each other can achieve synchronous rotation and can prevent the rotating cover 400 and the valve stem 310 from relative rotation.

[0054] In order to facilitate the plug-in fit between the connecting sleeve and the active end 311, the active end 311 includes a plug-in section 3111 and a guide section 3112. The plug-in section 3111 is adapted to the inner hole of the connecting sleeve, and the guide section 3112 is arranged at the top of the plug-in section 3111. The guide section 3112 is accommodated in the inner hole of the connecting sleeve and can rotate relative to the connecting sleeve. The guide section 3112 can provide a guiding function for the plug-in fit between the connecting sleeve and the active end 311, so as to realize the rapid switching of the magnetic locking valve between the locked state and the unlocked state, and avoid the axial direction of the connecting sleeve deviating from the axial direction of the active end 311 when the two are plugged in, so as to prevent the two from being accurately plugged in.

[0055] Optionally, the guide section 3112 is a cylindrical structure for easy processing. Figure 2 As shown, when the magnetic locking valve is in a locked state, the guide section 3112 is accommodated in the inner hole of the connecting sleeve and will not affect the idling of the rotating cover 400.

[0056] Continue as Figure 3-Figure 5 As shown, the valve stem 310 is also provided with an abutting step 313, and when the connecting portion 401 and the active end 311 are circumferentially fixed, the connecting portion 401 can abut against the abutting step 313. With this arrangement, it is possible to ensure that both are stably fixed along the axial direction of the valve stem 310 in the unlocked state, that is, when the rotating cover 400 moves along the axial direction of the valve stem 310 to a position abutting against the abutting step 313 under the action of an external force, the rotating cover 400 moves to its maximum position along the axial direction of the valve stem 310, at which time the rotating cover 400 can no longer continue to move along the axial direction of the valve stem 310 toward the direction close to the valve core 320, which can ensure that it can stably drive the valve stem 310 to rotate.

[0057] In this embodiment, the bottom of the receiving groove 201 is flush with the abutting step 313. This design allows the connection portion 401 to be supported on the bottom of the receiving groove 201 and the abutting step 313 when the magnetic lock valve is in the unlocked state, ensuring that the receiving groove 201 has an optimal groove depth, so as to avoid the groove depth of the receiving groove 201 being too large to affect the structural strength of the valve cover 200, and to avoid the groove depth of the receiving groove 201 being too small to cause the connection portion 401 to fail to abut against the abutting step 313, affecting the matching depth between the two. Of course, in other embodiments, the bottom of the receiving groove 201 can also be set to be slightly lower than the top surface of the abutting step 313, which can also achieve the above effect, and when the connection portion 401 abuts against the abutting step 313, there is a certain distance between the connection portion 401 and the bottom of the receiving groove 201, so as to ensure that the rotating cover 400 can rotate stably relative to the valve cover 200.

[0058] It should be explained that, in this embodiment, "above", "below", "higher than", "lower than", etc. are all based on Figure 2 The description is based on the placement state, and the structure of the magnetic locking valve of this embodiment is not limited to this.

[0059] Optionally, the magnetic locking valve further includes an axial stopper for limiting the rotation cover 400 from being away from the active end 311, and the rotation cover 400 is prevented from moving in a direction away from the active end 311 by the axial stopper. In the present embodiment, the axial stopper is a pressing sleeve 700 sleeved on the outside of the rotation cover 400, the pressing sleeve 700 is fixedly mounted on the circumferential outer side of the valve cover 200, and the lower end of the pressing sleeve 700 is threadedly connected to the circumferential outer side of the valve cover 200. Specifically, a step portion 402 is provided on the rotation cover 400, and a stopper 701 cooperating with the step portion 402 is provided at the upper end of the pressing sleeve 700. The step portion 402 can abut against the stopper 701 to limit the distance that the rotation cover 400 moves in a direction away from the active end 311, and prevent the rotation cover 400 from slipping out of the pressing sleeve 700.

[0060] Optionally, a second sealing member is further provided between the rotating cover 400 and the valve cover 200 to achieve dustproof and waterproof effects. In this embodiment, a receiving groove for accommodating the second sealing member is provided on the outer wall of the valve cover 200 to fix the second sealing member and prevent it from falling off. In this embodiment, the second sealing member is a rubber sealing ring.

[0061] Figure 6 FIG. 2 shows a cross-sectional schematic diagram of the magnetic lock valve provided in this embodiment in an intermediate state. Figure 6 Combined with Figure 2 , Figure 3As shown, the magnetic locking valve also includes a magnetic limit assembly 500, which is telescopically arranged on the circumference of the valve cover 200; when the magnetic locking valve is in a locked state, the magnetic limit assembly 500 extends to limit the movement of the rotating cover 400 along the axial direction of the valve stem 310; when the magnetic locking valve is in an unlocked state, the magnetic limit assembly 500 contracts under the action of an external magnetic force, and the rotating cover 400 can move along the axial direction of the valve stem 310, and the connecting portion 401 and the active end 311 are circumferentially fixed and can rotate synchronously.

[0062] The magnetic locking valve in this embodiment, in the locked state, that is, when there is no external magnetic force, the magnetic limit assembly 500 extends and the rotating cover 400 is supported on the magnetic limit assembly 500, thereby limiting the movement of the rotating cover 400 along the axial direction of the valve stem 310. At this time, the rotating cover 400 can only rotate idly, and the valve stem 310 will not rotate with the rotating cover 400, effectively avoiding the situation where the locking function of the magnetic locking valve fails due to a large external force in the locked state, thereby improving the anti-theft ability of the magnetic locking valve.

[0063] Figure 7 FIG. 2 shows a cross-sectional schematic diagram of the valve cover 200 provided in this embodiment. Figure 7 Combined with Figure 6 As shown, the valve cover 200 is provided with at least two mutually spaced mounting grooves 205 in the circumference, and a magnetic stopper assembly 500 is installed in each mounting groove 205; each magnetic stopper assembly 500 includes a first magnetic steel 510 and an elastic member 520, and the first magnetic steel 510 is retractably arranged in the mounting groove 205 through the elastic member 520. In the locked state, that is, when there is no external magnetic force, the first magnetic steel 510 can extend out of the mounting groove 205 under the elastic action of the elastic member 520, so as to support the rotating cover 400; when switching from the locked state to the unlocked state, the first magnetic steel 510 is subjected to the external magnetic repulsion force and compresses the elastic member 520, thereby retracting into the mounting groove 205. At this time, the rotating cover 400 can move along the axial direction of the valve stem 310 under the action of external force, so that the connecting portion 401 and the active end 311 are circumferentially fixed and rotate synchronously. Optionally, the elastic member 520 is a spring, which has a simple structure and low cost.

[0064] In this embodiment, four groups of magnetic limiter assemblies 500 are provided, and four mounting grooves 205 are evenly spaced along the circumference of the valve cover 200, and a first magnetic steel 510 and an elastic member 520 are provided in each mounting groove 205. Of course, in other embodiments, the number of groups of magnetic limiter assemblies 500 is not limited to four groups, and can also be three groups, two groups, five groups or more groups, etc.

[0065] Furthermore, a protective cover is provided on the outer side of the first magnetic steel 510, and the first magnetic steel 510 is protected by the protective cover to prevent the first magnetic steel 510 from breaking under the action of external force, thereby preventing the magnetic locking valve from malfunctioning, thereby improving the reliability of the magnetic locking valve. Optionally, the protective cover can be made of iron sheet or other material structure, as long as it does not hinder the magnetic force of the first magnetic steel 510 or make the magnetic force disappear.

[0066] Optionally, a first limiting step 403 is also provided on the inner wall of the rotating cover 400. When the magnetic locking valve is in a locked state, the first magnet 510 abuts against the first limiting step 403 to realize the limiting effect of the magnetic limiting assembly 500 on the rotating cover 400 along the axial direction of the valve stem 310.

[0067] Figure 8 FIG. 6 is a schematic diagram showing the structure of a magnetic key 600 provided in this embodiment. Figure 8 Combined with Figure 6 As shown, the magnetic locking valve also includes a magnetic key 600 that can be matched with the rotating cover 400. The magnetic key 600 can provide external magnetic force for the magnetic limit assembly 500 and can provide external force for the rotating cover 400. When the magnetic locking valve needs to be switched from the locked state to the unlocked state, the magnetic key 600 can be used to provide external magnetic force for the magnetic limit assembly 500 to shrink it; at this time, the operator can use the magnetic key 600 to provide external force for the rotating cover 400, so that the rotating cover 400 moves along the axial direction of the valve stem 310, and the connecting portion 401 and the active end 311 are circumferentially fixed and can rotate synchronously. When the rotating cover 400 is rotated, the valve stem 310 can be driven to rotate, so that the valve core 320 opens and closes the flow channel 101.

[0068] Specifically, the magnetic key 600 includes a key body 610 and a second magnetic steel 620. The key body 610 is provided with a plug-in slot 611 that can be plugged with the rotating cover 400. The second magnetic steel 620 is embedded in the key body 610. The second magnetic steel 620 and the magnetic limit assembly 500 are magnetically repelled. In this embodiment, the number of groups of the second magnetic steel 620 is equal to the number of groups of the first magnetic steel 510. When the number of groups of the second magnetic steel 620 is opposite to the first magnetic steel 510, mutual repulsion occurs between the two, so that the first magnetic steel 510 is retracted into the installation slot 205 of the valve cover 200.

[0069] Combine the following Figure 2 , Figure 3 and Figure 6 Briefly describe the working principle of the magnetic lock valve:

[0070] like Figure 2 As shown, the magnetic locking valve is in a locked state, at which time the connecting portion 401 is detached from the valve stem 310 , and the rotating cover 400 can only rotate idly and cannot drive the valve stem 310 to rotate.

[0071] like Figure 3 and Figure 6 As shown, when unlocking is required, the magnetic key 600 is sleeved on the rotating cover 400, and the rotating cover 400 is driven to rotate synchronously during the sleeve process, so that each second magnet 620 is directly opposite to a first magnet 510, and the first magnet 510 compresses the elastic member 520 and retracts into the mounting groove 205 of the valve cover 200 under the action of the magnetic repulsion force of the second magnet 620; the magnetic key 600 continues to drive the rotating cover 400 to move downward, so that the connecting portion 401 of the rotating cover 400 and the active end 311 of the valve stem 310 are circumferentially fixed; at this time, the operator can rotate the magnetic key 600 to drive the valve stem 310 to rotate through the rotating cover 400, thereby realizing the descent or ascent of the valve core 320 to cut off or connect the flow channel 101.

[0072] When it is necessary to lock again, remove the magnetic key 600, then pull up the rotating cover 400, and the rotating cover 400 moves upward along the axial direction of the valve stem 310. When the first limiting step 403 of the rotating cover 400 moves to the top of the first magnetic steel 510, the first magnetic steel 510 extends out of the mounting groove 205 of the valve cover 200 under the elastic force of the elastic member 520, and the rotating cover 400 is re-supported on the first magnetic steel 510. The step portion 402 of the rotating cover 400 abuts against the limiting portion 701 of the pressing sleeve 700, and the rotating cover 400 cannot continue to move upward. At this time, the connecting portion 401 and the active end 311 are again separated from the circumferentially fixed (synchronous rotation) state, so that the magnetic locking valve returns to the locked state.

[0073] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A magnetic lock valve, comprising a valve body (100), a valve cover (200) and a valve stem assembly (300), wherein a flow channel (101) is arranged in the valve body (100), the valve cover (200) is arranged on the valve body (100), the valve stem assembly (300) comprises a valve stem (310) and a valve core (320), an active end (311) of the valve stem (310) is inserted into the valve cover (200); a passive end (312) of the valve stem (310) is connected to the valve core (320), the valve stem (310) rotates to enable the valve core (320) to open and close the flow channel (101), characterized in that: The magnetic lock valve also includes: A rotating cover (400) is rotatably sleeved on the valve cover (200), and a connecting portion (401) opposite to the active end (311) is provided on the inner top wall of the rotating cover (400). The rotating cover (400) can move along the axial direction of the valve stem (310) under the action of an external force, so that the connecting portion (401) and the active end (311) are circumferentially fixed; The valve cover (200) is provided with a receiving groove (201) arranged around the valve stem (310); when the connecting portion (401) and the active end (311) are circumferentially fixed, the connecting portion (401) can be partially received in the receiving groove (201).

2. The magnetic lock valve according to claim 1, characterized in that: The connecting portion (401) and the active end (311) can be plugged into each other.

3. The magnetic lock valve according to claim 2, characterized in that: The connecting portion (401) is a connecting sleeve, and the connecting sleeve can be plugged into the active end (311).

4. The magnetic lock valve according to claim 3, characterized in that: The active end (311) comprises an inserting section (3111) and a guiding section (3112), wherein the inserting section (3111) is adapted to the inner hole of the connecting sleeve, and the guiding section (3112) is arranged at the top of the inserting section (3111), and the guiding section (3112) is accommodated in the inner hole of the connecting sleeve and can rotate relative to the connecting sleeve.

5. The magnetic lock valve according to claim 4, characterized in that: The guide section (3112) is a cylindrical structure.

6. The magnetic lock valve according to claim 3, characterized in that: The valve stem (310) is also provided with an abutment step (313). When the connecting portion (401) and the active end (311) are circumferentially fixed, the connecting portion (401) can abut against the abutment step (313).

7. The magnetic lock valve according to any one of claims 1 to 6, characterized in that: The magnetic locking valve further comprises a magnetic limiting assembly (500), wherein the magnetic limiting assembly (500) is telescopically arranged in the circumference of the valve cover (200); When the magnetic locking valve is in a locked state, the magnetic limiting assembly (500) extends to limit the movement of the rotating cover (400) along the axial direction of the valve stem (310); When the magnetic locking valve is in an unlocked state, the magnetic limiting assembly (500) contracts under the action of an external magnetic force, so that the rotating cover (400) can move along the axial direction of the valve stem (310), and the connecting portion (401) and the active end (311) are circumferentially fixed and can rotate synchronously.

8. The magnetic lock valve according to claim 7, characterized in that: The valve cover (200) is provided with at least two mutually spaced installation grooves (205) in the circumference thereof, and the magnetic limit assembly (500) is installed in each of the installation grooves (205); each of the magnetic limit assemblies (500) comprises a first magnetic steel (510) and an elastic member (520), and the first magnetic steel (510) is telescopically arranged in the installation groove (205) via the elastic member (520).

9. The magnetic lock valve according to claim 8, characterized in that: A first limiting step (403) is also provided on the inner wall of the rotating cover (400), and when the magnetic locking valve is in a locked state, the first magnetic steel (510) abuts against the first limiting step (403).

10. The magnetic lock valve according to claim 7, characterized in that: The magnetic locking valve further comprises a magnetic key (600) which is compatible with the rotating cover (400), and the magnetic key (600) can provide an external magnetic force for the magnetic limiting assembly (500) and can provide an external force for the rotating cover (400).

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