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, a rotating cover and a magnetic limiting assembly, a flow channel is formed in the valve body, the valve cover is arranged on the valve body, the valve rod assembly comprises a valve rod and a valve element, the driving end of the valve rod penetrates through the valve cover, the valve cover is rotatably sleeved with the rotating cover, and the rotating cover can move in the axis direction of the valve rod under the action of external force; the rotary cover is circumferentially fixed with the driving end, and a first limiting step is arranged on the inner wall of the rotary cover; the magnetic limiting assembly comprises a magnetic part telescopically arranged in the circumferential direction of the valve deck, the magnetic part comprises first magnetic steel and an abutting block which are connected, and the abutting block is provided with an abutting face capable of abutting against the first limiting step. When the magnetic locking valve is in a locking state, the abutting block with high hardness is in contact with the first limiting step, so that the magnetic steel can be prevented from being broken due to falling, and the use reliability of the magnetic locking valve is improved.

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 enable the valve core 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, a magnet and an elastic member. The rotating cover can be rotatably mounted on the valve cover and can move axially under the action of external force. The magnet is telescopically arranged in the circumference of the valve cover through the elastic member to limit the axial movement of the rotating cover toward the valve stem. In the unlocked state, the magnet retracts into the valve cover, the rotating cover can move axially, and can be circumferentially fixed to the top of the valve stem; in the locked state, the magnet extends out and can abut against the step surface on the rotating cover to limit the axial movement of the rotating cover and make the rotating cover and the valve stem out of the circumferentially fixed state.

[0004] However, the above-mentioned setting often has the following problems: when the magnetic locking valve is in a locked state, the contact position between the magnet and the step surface of the rotating cover is subjected to greater force, and the magnet is a brittle material. When the magnetic locking valve falls upside down, the magnet is easily broken, causing the locking structure to fail.

[0005] Therefore, it is urgent to provide a magnetic lock valve to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a magnetic locking valve, which can prevent the magnetic steel from breaking due to falling and thus prevent the locking function from malfunctioning, thereby improving the reliability of its use.

[0007] As conceived above, the technical solution adopted by the utility model is:

[0008] 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:

[0009] A rotating cover is rotatably sleeved on the valve cover, and the rotating cover can move along the axial direction of the valve stem under the action of an external force so as to be circumferentially fixed with the active end, and a first limiting step is provided on the inner wall of the rotating cover;

[0010] A magnetic limit assembly, comprising a magnetic member telescopically arranged on the circumference of the valve cover, wherein the magnetic member comprises a first magnetic steel and an abutment block connected to each other, and the abutment block is provided with an abutment surface capable of abutting against the first limit step;

[0011] When the magnetic locking valve is in a locked state, the magnetic member extends out, and the first limiting step abuts against the abutting surface, so as to limit the movement of the rotating cover along the axial direction of the valve stem;

[0012] When the magnetic locking valve is in an unlocked state, the magnetic member 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 rotating cover and the active end are circumferentially fixed.

[0013] As a preferred solution of the magnetic locking valve provided by the utility model, the valve cover is provided with a mounting groove for mounting the magnetic component, and the magnetic limit assembly also includes an elastic component, and the magnetic component is telescopically arranged in the mounting groove through the elastic component.

[0014] As a preferred solution of the magnetic locking valve provided by the utility model, there are multiple installation grooves, adjacent installation grooves are arranged at intervals along the circumference of the valve cover, and each installation groove corresponds to one magnetic limit assembly.

[0015] As a preferred solution of the magnetic locking valve provided by the utility model, the abutment block includes an abutment portion and an embedded portion connected to each other, the embedded portion is embedded in the first magnetic steel, the abutment portion protrudes from the first magnetic steel, and the abutment surface is arranged on the abutment portion.

[0016] As a preferred solution of the magnetic lock valve provided by the utility model, a mounting hole for mounting the embedded part is provided in the first magnetic steel;

[0017] The mounting hole is arranged to penetrate along the axial direction of the first magnetic steel; or the mounting hole is a blind hole opened along the axial direction of the first magnetic steel.

[0018] As a preferred solution of the magnetic locking valve provided by the utility model, the embedded portion is partially exposed from the first magnetic steel and fits with the groove wall of the installation groove.

[0019] As a preferred solution of the magnetic lock valve provided by the utility model, the abutting surface is a plane.

[0020] As a preferred solution of the magnetic locking valve provided by the utility model, at least a portion of the abutment block is arranged to protrude from the end surface of the first magnetic steel along the axial direction of the first magnetic steel.

[0021] As a preferred solution of the magnetic locking valve provided by the utility model, the hardness of the abutment block is greater than the hardness of the first magnetic steel.

[0022] As a preferred solution of the magnetic lock valve provided by the utility model, the abutment block is made of brass or stainless steel.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a magnetic locking valve, by providing an abutment block connected to the first magnetic steel, when the magnetic locking valve is in a locked state, the abutment surface of the abutment block can abut against the first limiting step provided on the rotating cover, thereby avoiding the situation where the first magnetic steel made of brittle material is subjected to a large force when abutting against the first limiting step, and is easily broken when falling, thereby improving the reliability of the magnetic locking valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the magnetic lock valve provided by the utility model in a locked state;

[0026] Figure 2 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the utility model in a locked state;

[0027] Figure 3 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the utility model in an intermediate state;

[0028] Figure 4 It is a cross-sectional schematic diagram of the magnetic lock valve provided by the utility model in an unlocked state;

[0029] Figure 5 It is a structural schematic diagram of the rotary cover provided by the utility model;

[0030] Figure 6 It is a cross-sectional schematic diagram of the rotary cover provided by the utility model;

[0031] Figure 7It is a structural schematic diagram of the magnetic key provided by the utility model;

[0032] Figure 8 It is a structural schematic diagram of a magnetic component provided in Embodiment 1 of the present utility model;

[0033] Fig. 9 It is a cross-sectional schematic diagram of a magnetic member provided in Embodiment 1 of the present utility model;

[0034] Fig.10 This is a schematic diagram of the structure of the first magnetic member provided in the second embodiment of the present utility model;

[0035] Fig.11 It is a cross-sectional schematic diagram of the first magnetic member provided in the second embodiment of the present utility model;

[0036] Fig.12 This is a schematic diagram of the structure of the second magnetic member provided in the second embodiment of the present utility model;

[0037] Fig.13 It is a cross-sectional schematic diagram of the second magnetic member provided in the second embodiment of the present utility model;

[0038] Fig.14 It is a schematic structural diagram of the third magnetic component provided in the second embodiment of the present utility model.

[0039] In the figure:

[0040] 100, valve body; 101, flow channel;

[0041] 200, valve cover; 201, mounting groove; 202, penetration hole; 203, limiting structure; 204, first sealing member;

[0042] 300, valve stem assembly; 310, valve stem; 311, active end; 312, driven end; 320, valve core;

[0043] 400, rotating cover; 401, connecting portion; 402, second limiting step; 403, first limiting step;

[0044] 500, magnetic limit assembly; 510, magnetic member; 511, first magnetic steel; 5111, mounting hole; 512, abutment block; 5121, abutment portion; 51211, abutment surface; 5122, embedded portion; 51221, exposed surface; 520, elastic member;

[0045] 600, magnetic key; 610, key body; 611, plug-in slot; 620, second magnetic steel;

[0046] 700, pressing sleeve; 701, limiting part. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] The utility model 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.

[0052] The specific structure and working process of the magnetic lock valve provided by the utility model are described in detail below through multiple embodiments.

[0053] Embodiment 1

[0054] Figure 1The schematic diagram of the structure of the magnetic locking valve provided in this embodiment in the 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.

[0055] 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.

[0056] 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.

[0057] 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 third 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.

[0058] 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.

[0059] Figure 3 A cross-sectional schematic diagram of the magnetic locking valve provided in this embodiment in an intermediate state is shown. Figure 4 FIG. 2 shows a cross-sectional schematic diagram of the magnetic lock valve provided in this embodiment in an unlocked state. Figure 3-Figure 4 Combined with Figure 2 As shown, 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 400 and a magnetic limiting assembly 500. The rotating cover 400 is rotatably sleeved on the valve cover 200. The rotating cover 400 can move along the axial direction of the valve stem 310 under the action of an external force so that it is circumferentially fixed with the active end 311. A first limiting step 403 is provided on the inner wall of the rotating cover 400; the magnetic limiting assembly 500 includes a magnetic member 510 which is telescopically arranged on the circumference of the valve cover 200. The magnetic member 510 includes a first magnetic steel 511 and an abutment block 512 which are connected to each other. The hardness of the contact block 512 is greater than the hardness of the first magnetic steel 511, and the contact block 512 is provided with an abutment surface 51211 that can abut against the first limiting step 403; when the magnetic locking valve is in a locked state, the magnetic component 510 extends, and the first limiting step 403 and the abutment surface 51211 abut against each other, so as 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 component 510 contracts under the action of external magnetic force, so that the rotating cover 400 can move along the axial direction of the valve stem 310, and the rotating cover 400 and the active end 311 are circumferentially fixed.

[0060] It should be explained that in the locked state, that is, when there is no external magnetic force, the magnetic member 510 extends out, and the rotating cover 400 is supported on the abutment block 512 of the magnetic member 510, 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 idle, and the valve stem 310 will not rotate with the rotation of 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; when the magnetic locking valve switches from the locked state to the unlocked state, the magnetic member 510 contracts due to the external magnetic force. At this time, the rotating cover 400 can move downward along the axial direction of the valve stem 310 under the action of external force, so that the rotating cover 400 is plugged into and matched with the active end 311. At this time, rotating the rotating cover 400 again can drive the valve stem 310 to rotate, so that the valve core 320 opens and closes the flow channel 101. In this embodiment, by providing an abutment block 512 connected to the first magnet 511, when the magnetic locking valve is in a locked state, the abutment surface 51211 of the abutment block 512 can abut against the first limiting step 403 provided on the rotating cover 400, thereby avoiding the situation where the first magnet 511 made of brittle material is subjected to a large force when abutting against the first limiting step 403, and is easily broken when falling, thereby improving the reliability of the magnetic locking valve.

[0061] Figure 5 A schematic structural diagram of a rotating cover 400 provided in this embodiment is shown. Figure 6 FIG. 4 shows a cross-sectional schematic diagram of the rotating cover 400 provided by the present invention. Figure 5-Figure 6 Combined with Figure 4 As shown, in order to achieve the effect of circumferential fixation of the rotating cover 400 and the active end 311 of the valve stem 310, a connecting portion 401 opposite to the active end 311 is provided on the inner top wall of the rotating cover 400, and the connecting portion 401 can be plugged with the active end 311. When the connecting portion 401 is plugged with the active end 311, the two are circumferentially fixed. Preferably, the connecting portion 401 is a connecting sleeve, which can be plugged with the active end 311, and 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 achieve 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.

[0062] 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.

[0063] like Figure 2-Figure 4 As shown, the valve cover 200 is provided with a mounting groove 201 for mounting the magnetic member 510 . The magnetic limiting assembly 500 further includes an elastic member 520 . The magnetic member 510 is telescopically disposed in the mounting groove 201 through the elastic member 520 . When the magnetic locking valve is in the locked state, that is, when there is no external magnetic force, the magnetic member 510 can extend under the elastic action of the elastic member 520, and the rotating cover 400 is supported on the magnetic member 510, thereby limiting the movement of the rotating cover 400 along the axis direction of the valve stem 310; when the magnetic locking valve is switched from the locked state to the unlocked state, the magnetic member 510 is compressed by the external magnetic force and retracts into the mounting groove 201. At this time, the rotating cover 400 can move downward along the axis direction of the valve stem 310 under the action of external force, so that the connecting portion 401 of the rotating cover 400 is plugged and matched with the active end 311. At this time, rotating the rotating cover 400 again can drive the valve stem 310 to rotate, so that the valve core 320 opens and closes the flow channel 101. Optionally, the elastic member 520 is a spring, which has a simple structure and low cost.

[0064] Optionally, the number of mounting grooves 201 is multiple, and adjacent mounting grooves 201 are arranged at intervals along the circumference of the valve cover 200, and each mounting groove 201 corresponds to a magnetic limit assembly 500 to increase the balance of force on the valve cover 200. In this embodiment, the number of mounting grooves 201 is four, and each mounting groove 201 corresponds to a group of magnetic limit assemblies 500, so as to reduce the number of magnetic limit assemblies 500 while ensuring the balance of force on the valve cover 200, facilitate installation, and reduce processing costs. Of course, in other embodiments, the number of groups of magnetic limit assemblies 500 is not limited to four groups, and can also be three groups, two groups, five groups or more groups, etc.

[0065] 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 second stopper step 402 is provided on the rotation cover 400, and a stopper portion 701 cooperating with the second stopper step 402 is provided at the upper end of the pressing sleeve 700. The second stopper step 402 can abut against the stopper portion 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.

[0066] 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.

[0067] Continue as Figure 2-Figure 4 As shown, the magnetic locking valve further 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] Figure 7 FIG. 6 is a schematic diagram showing the structure of a magnetic key 600 provided in this embodiment. Figure 7 Combined with Figure 4 As shown, 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 magnetic member 510. When the number of groups of the second magnetic steel 620 and the magnetic member 510 are opposite, mutual repulsion occurs between the two, so that the magnetic member 510 is retracted into the installation slot 201 of the valve cover 200.

[0069] Figure 8 A schematic structural diagram of a magnetic member 510 provided in this embodiment is shown. Fig. 9 FIG. 5 shows a cross-sectional schematic diagram of the magnetic member 510 provided in this embodiment. Figure 8-Figure 9 As shown, at least part of the abutment block 512 is arranged to protrude from the end surface of the first magnetic steel 511 along the axial direction of the first magnetic steel 511. With this arrangement, when the magnetic lock valve is in a locked state, only the abutment block 512 can be extended out of the mounting groove 201, or the abutment block 512 and the first magnetic steel 511 of a smaller length can be extended out of the mounting groove 201 to support the first limiting step 403, so that most of the first magnetic steel 511 is located in the mounting groove 201, further protecting the first magnetic steel 511 from being broken.

[0070] Specifically, in this embodiment, the abutting block 512 includes an abutting portion 5121 and an embedding portion 5122 connected to each other, the embedding portion 5122 is embedded in the first magnetic steel 511, the abutting portion 5121 protrudes from the first magnetic steel 511, and the abutting surface 51211 is provided on the abutting portion 5121. In this embodiment, the first magnetic steel 511 is a cylindrical structure with a mounting hole 5111 provided therein, and the embedding portion 5122 is interference-fitted in the mounting hole 5111, thereby achieving a stable connection between the abutting block 512 and the first magnetic steel 511.

[0071] Optionally, the mounting hole 5111 provided on the first magnetic steel 511 is provided along the axial direction of the first magnetic steel 511, and the length of the abutment block 512 is greater than the dimension of the first magnetic steel 511 in the axial direction, so as to facilitate processing and assembly. Of course, the present embodiment does not limit the dimension of the abutment block 512, and the mounting hole 5111 can also be a blind hole provided on the first magnetic steel 511, which can also achieve the above-mentioned effect.

[0072] In order to further improve the supporting effect of the abutment block 512 on the first limiting step 403, the abutment surface 51211 is a plane. This design can increase the contact area between the abutment block 512 and the first limiting step 403, avoiding stress concentration caused by too small contact area between the two.

[0073] In one example, the abutment portion 5121 is a columnar structure, and the cross-sectional shape of the abutment portion 5121 is an n-gon, where n≥3. That is, the abutment portion 5121 can be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc., and one side surface of the prism forms the abutment surface 51211.

[0074] In another example, the abutment portion 5121 is a columnar structure, and the cross-sectional shape of the abutment portion 5121 is a figure surrounded by at least one straight line and at least one curve. Exemplarily, the abutment portion 5121 can be a semi-cylinder, and the side plane of the semi-cylinder forms the above-mentioned abutment surface 51211. This embodiment does not limit the specific shape of the abutment portion 5121, and the designer can adjust its shape according to actual processing requirements; in addition, this embodiment does not limit the specific shape of the embedded portion 5122, as long as a stable connection between the abutment portion 5121 and the first magnetic steel 511 can be achieved.

[0075] like Figure 8 As shown, the projection of the abutment block 512 on the end face of the first magnetic steel 511 is located inside the end face profile of the first magnetic steel 511. By way of example, the first magnetic steel 511 is a cylindrical structure, and the abutment block 512 is a regular quadrangular prism. The length of the end face diagonal of the regular quadrangular prism is less than the diameter of the first magnetic steel 511, and the central axis of the abutment block 512 coincides with the axis of the first magnetic steel 511. This embodiment does not limit the setting position of the abutment block 512 on the first magnetic steel 511. The central axis of the abutment block 512 can be set to coincide with the axis of the first magnetic steel 511, or the central axis of the abutment block 512 can be set not to coincide with the axis of the first magnetic steel 511.

[0076] In this embodiment, the abutting portion 5121 and the embedded portion 5122 are an integrated structure, which saves the assembly steps between the two, improves the assembly efficiency, and can avoid the connection position between the two from being easily broken during separate molding.

[0077] Optionally, the hardness of the abutment block 512 is greater than the hardness of the first magnetic steel 511. The first magnetic steel 511 is a brittle material, which is easily broken when it falls, causing the locking function of the magnetic locking valve to fail. By replacing the part of the magnetic member 510 that matches the first limiting step 403 with the abutment block 512 with greater hardness, the reliability of the use of the magnetic locking valve can be further improved, and the first magnetic steel 511 can be prevented from being broken due to a large force. In this embodiment, the abutment block 512 is made of brass or stainless steel. Of course, this embodiment does not limit the material of the abutment block 512, as long as the hardness is appropriate and its material does not affect the magnetic force between the first magnetic steel 511 and the second magnetic steel 620.

[0078] Embodiment 2

[0079] This embodiment provides a magnetic locking valve, the specific structure of which is substantially the same as that of the magnetic locking valve in the first embodiment, except that the structure of the magnetic member 510 is different.

[0080] Fig.10A schematic structural diagram of a first magnetic member 510 provided in this embodiment is shown. Fig.11 A cross-sectional schematic diagram of a first magnetic member 510 provided in this embodiment is shown. Fig.12 A schematic structural diagram of a second magnetic member 510 provided in this embodiment is shown. Fig.13 FIG. 5 shows a cross-sectional schematic diagram of a second magnetic member 510 provided in this embodiment. Figure 10-13 As shown, the embedded portion 5122 is partially exposed from the first magnetic steel 511 to form an exposed surface 51221, and the exposed surface 51221 is in contact with the wall of the installation groove 201. Specifically, the first magnetic steel 511 includes two oppositely disposed semi-cylindrical structures, and the embedded portion 5122 is sandwiched between the two semi-cylindrical structures.

[0081] like Figure 10-11 As shown, the exposed surface 51221 is a plane, and this design can be applied to the structure where the mounting groove 201 is a rectangular groove; Figure 12-13 As shown, the exposed surface 51221 is an arc surface. This design can be applied to the structure where the mounting groove 201 is a circular groove to increase the fitting area between the magnetic member 510 and the mounting groove 201, thereby further improving the reliability of the magnetic locking valve.

[0082] Fig.14 FIG. 5 shows a schematic structural diagram of a third magnetic member 510 provided in this embodiment. Fig.14 As shown, the design Fig.12 The difference between the magnetic member 510 and the magnetic member 510 is that: in this example, the abutting portion 5121 is a cubic structure and is arranged at a position below the axis of the first magnetic steel 511 (i.e., Figure 2 The bottom of the embedded portion 5122 is exposed to the first magnetic steel 511 and forms an arc-shaped exposed surface 51221. This design can reduce the material and processing cost while ensuring the structural reliability of the magnetic lock valve.

[0083] Embodiment 3

[0084] This embodiment provides a magnetic locking valve, the specific structure of which is substantially the same as that of the magnetic locking valve in the first embodiment, except that the structure of the magnetic member 510 is different.

[0085] Specifically, the magnetic member 510 includes a first magnetic steel 511 and an abutment block 512 connected to the end surface of the first magnetic steel 511, and the abutment surface 51211 is arranged on the abutment block 512. That is, in this embodiment, the first magnetic steel 511 is a solid cylindrical structure, and the abutment block 512 is connected to the circular end surface of the first magnetic steel 511, that is, the abutment block 512 is arranged to protrude from the end surface of the first magnetic steel 511 along the axial direction of the first magnetic steel 511. Optionally, the abutment block 512 is welded to the first magnetic steel 511 to achieve a stable connection between the two.

[0086] In one example, the abutment block 512 is a columnar structure, and the cross-sectional shape of the abutment block 512 is an n-gon, where n≥3. That is, the abutment block 512 can be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, etc., and one side surface of the prism forms the abutment surface 51211.

[0087] In another example, the abutment block 512 is a columnar structure, and the cross-sectional shape of the abutment block 512 is a figure surrounded by at least one straight line and at least one curve. For example, the abutment block 512 can be a semi-cylinder, and the side plane of the semi-cylinder forms the above-mentioned abutment surface 51211. This embodiment does not limit the specific shape of the abutment block 512, and the designer can adjust its shape according to actual processing requirements.

[0088] In this embodiment, the abutment block 512 is a quadrangular prism, and one side surface of the quadrangular prism forms the abutment surface 51211 to facilitate processing and assembly.

[0089] 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) rotatably sleeved on the valve cover (200); the rotating cover (400) can move along the axial direction of the valve stem (310) under the action of an external force so as to be circumferentially fixed to the active end (311); and a first limiting step (403) is provided on the inner wall of the rotating cover (400); A magnetic limiting assembly (500) comprising a magnetic member (510) telescopically arranged in the circumference of the valve cover (200), the magnetic member (510) comprising a first magnetic steel (511) and an abutment block (512) connected to each other, the abutment block (512) being provided with an abutment surface (51211) capable of abutting against the first limiting step (403); When the magnetic locking valve is in a locked state, the magnetic member (510) extends, and the first limiting step (403) and the abutting surface (51211) abut against each other, so as 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 member (510) 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 rotating cover (400) and the active end (311) are circumferentially fixed.

2. The magnetic lock valve according to claim 1, characterized in that: The valve cover (200) is provided with a mounting groove (201) for mounting the magnetic component (510), and the magnetic limit assembly (500) further comprises an elastic component (520), and the magnetic component (510) is telescopically arranged in the mounting groove (201) via the elastic component (520).

3. The magnetic lock valve according to claim 2, characterized in that: There are a plurality of the mounting grooves (201), adjacent mounting grooves (201) are arranged at intervals along the circumference of the valve cover (200), and each mounting groove (201) corresponds to one magnetic limit assembly (500).

4. The magnetic lock valve according to claim 2, characterized in that: The abutment block (512) comprises an abutment portion (5121) and an embedded portion (5122) which are connected to each other, wherein the embedded portion (5122) is embedded in the first magnetic steel (511), the abutment portion (5121) protrudes from the first magnetic steel (511), and the abutment surface (51211) is arranged on the abutment portion (5121).

5. The magnetic lock valve according to claim 4, characterized in that: The first magnetic steel (511) is provided with a mounting hole (5111) for mounting the embedded portion (5122); The mounting hole (5111) is arranged to penetrate along the axial direction of the first magnetic steel (511); or the mounting hole (5111) is a blind hole opened along the axial direction of the first magnetic steel (511).

6. The magnetic lock valve according to claim 4, characterized in that: The embedded portion (5122) is partially exposed from the first magnetic steel (511) and fits in with the groove wall of the installation groove (201).

7. The magnetic lock valve according to claim 1, characterized in that: At least a portion of the abutment block (512) is arranged to protrude from an end surface of the first magnetic steel (511) along an axial direction of the first magnetic steel (511).

8. The magnetic lock valve according to any one of claims 1 to 7, characterized in that: The abutting surface (51211) is a plane.

9. The magnetic lock valve according to any one of claims 1 to 7, characterized in that: The hardness of the abutment block (512) is greater than the hardness of the first magnetic steel (511).

10. The magnetic lock valve according to any one of claims 1 to 7, characterized in that: The abutment block (512) is made of brass or stainless steel.

Images