Locking valve

Abstract

The utility model relates to the technical field of valves, and discloses a locking valve. The locking valve comprises a valve body assembly, a valve rod assembly, a valve cover sleeve, a connecting piece and a bolt assembly, wherein the valve cover sleeve is rotatably arranged outside the valve body assembly in a sleeving manner; the connecting piece is arranged in the valve cover sleeve and connected with the end, away from the valve element, of the valve rod, a first lock hole is formed in the connecting piece, and a second lock hole opposite to the first lock hole is formed in the valve cover sleeve; the plug pin assembly comprises a magnetic plug pin and an elastic piece, the magnetic plug pin is arranged in the first lock hole in a sliding mode, and the two ends of the elastic piece abut against the magnetic plug pin and the valve deck sleeve respectively; in an unlocking state, the magnetic bolt can be partially inserted into the second lock hole under the action of external magnetic force, so that the valve cover sleeve can drive the valve rod to synchronously rotate through the connecting piece when rotating; and in a locking state, the magnetic bolt can be separated from the second lock hole under the elastic action of the elastic piece, so that the valve cover sleeve idles. The locking valve is high in reliability and strong in anti-theft capability.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a 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 effect of magnetic force to control the locking and unlocking of the valve. In the magnetic locking valve in the related art, when the valve cover sleeve and the valve cover are opened without a key, the valve cover sleeve and the valve cover are connected together by a magnetic steel. At this time, the magnetic steel acts as a latch, and the valve cover cannot be rotated. Without a special key, the valve cannot be opened and closed; when unlocking is required, a special key sleeve is set on the valve cover sleeve, and the magnetic steel on the special key can push the magnetic steel between the valve cover sleeve and the valve cover to separate the valve cover sleeve from the valve cover. At this time, turning the key can drive the valve cover sleeve and the valve stem assembly connected to the valve cover sleeve to rotate, so as to cut off or connect the flow of the medium in the pipeline. However, due to the low strength of the magnetic steel, in the locked state, its two ends extend into the receiving holes of the valve cover sleeve and the valve cover respectively. Clamping the valve cover sleeve with a pipe clamp and turning it slightly with force can destroy the magnetic steel, making the locking function of the magnetic steel ineffective, resulting in a weak anti-theft ability of the magnetic locking valve.

[0004] Therefore, it is urgent to propose a locking valve to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a locking valve, which can prevent the magnetic steel from being damaged due to a large external force in the locked state, thereby improving the anti-theft ability of the locking valve.

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

[0007] A locking valve comprises a valve body assembly and a valve stem assembly, wherein the valve body assembly has a flow channel, the valve stem assembly comprises a valve stem and a valve core connected to the valve stem, the valve stem is inserted into the valve body assembly, the valve stem can drive the valve core to open and close the flow channel by rotating, and the locking valve further comprises:

[0008] A valve cover sleeve, rotatably sleeved outside the valve body assembly;

[0009] A connecting piece, arranged in the valve cover sleeve and connected to an end of the valve stem away from the valve core, the connecting piece is provided with a first locking hole, and the valve cover sleeve is provided with a second locking hole opposite to the first locking hole;

[0010] A latch assembly, comprising a magnetic latch and an elastic member, wherein the magnetic latch is slidably disposed in the first lock hole, and two ends of the elastic member are respectively abutted against the magnetic latch and the valve cover sleeve;

[0011] In the unlocked state, the magnetic latch can be partially inserted into the second lock hole under the action of external magnetic force, so that when the valve cover sleeve rotates, the valve stem can be driven to rotate synchronously through the connecting member; in the locked state, the magnetic latch can be disengaged from the second lock hole under the elastic action of the elastic member, so that the valve cover sleeve can idle.

[0012] As a preferred solution of the locking valve provided by the utility model, the cross-sectional shape of the magnetic latch is T-shaped, the large diameter section of the magnetic latch is arranged toward the first locking hole, the elastic member is sleeved on the small diameter section of the magnetic latch, and abuts against the step surface between the large diameter section and the small diameter section.

[0013] As a preferred solution of the locking valve provided by the utility model, the magnetic latch includes a latch body and a first magnetic steel embedded in the latch body.

[0014] As a preferred solution of the locking valve provided by the utility model, the height L of the magnetic latch satisfies: L1<L<L2;

[0015] Wherein, L1 is the distance between the top surface of the connecting piece and the inner top wall of the valve cover sleeve; L2 is the distance between the bottom of the first locking hole and the inner top wall of the valve cover sleeve.

[0016] As a preferred solution of the locking valve provided by the utility model, there are multiple first locking holes, and the multiple first locking holes are arranged at intervals along the circumference of the connecting piece, and each of the first locking holes corresponds to one second locking hole and one latch assembly.

[0017] As a preferred solution of the locking valve provided by the utility model, the connecting piece is provided with a plug hole which can be plugged and matched with the top of the valve stem, and at least a part of the plug hole is non-circular.

[0018] As a preferred solution of the locking valve provided by the utility model, the connecting piece is a disc-shaped structure.

[0019] As a preferred solution of the locking valve provided by the utility model, the valve body assembly includes:

[0020] a valve body, wherein the flow channel is opened on the valve body;

[0021] A valve cover is connected to the top of the valve body, and a mounting groove for mounting the connecting piece is provided on the valve cover.

[0022] As a preferred solution of the locking valve provided by the utility model, a first limiting protrusion is provided on one of the groove wall of the installation groove and the outer wall of the connecting piece, and a first limiting groove matching with the first limiting protrusion is provided on the other.

[0023] As a preferred solution of the locking valve provided by the utility model, the locking valve further comprises a magnetic key which can be matched with the valve cover sleeve, and the magnetic key can provide external magnetic force for the magnetic latch.

[0024] The beneficial effects of the utility model are:

[0025] The utility model provides a locking valve. When the locking valve needs to be switched to an unlocked state, an external magnetic suction force is applied. Under the action of the magnetic suction force, the magnetic latch overcomes the elastic force of the elastic member and is partially inserted into the second locking hole. At this time, the valve cover sleeve and the connecting member form a rotation-restricted connection through the magnetic latch. The valve cover sleeve, the connecting member and the valve stem can rotate synchronously. By rotating the valve cover sleeve, the connecting member and the valve stem can be driven to rotate synchronously, thereby controlling the locking valve to be opened or closed. When the locking valve is switched from the unlocked state to the locked state, the external magnetic force can be eliminated, and the magnetic latch can be separated from the second locking hole under the elastic action of the elastic member. At this time, the valve cover sleeve is separated from the connecting member, the valve cover sleeve can only rotate idly, and the connecting member and the valve stem will not rotate with the rotation of the valve cover sleeve, effectively avoiding the situation in which the magnetic steel used as the latch is damaged and the locking function fails due to a large external force in the locked state, thereby improving the anti-theft ability of the locking valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a locking valve provided by an embodiment of the utility model;

[0027] Figure 2 It is a cross-sectional schematic diagram of a locking valve provided by an embodiment of the utility model;

[0028] Figure 3 yes Figure 2 A local enlarged view at point A;

[0029] Figure 4 It is a structural schematic diagram of a connecting piece provided by an embodiment of the utility model;

[0030] Figure 5 It is a structural schematic diagram of a valve stem provided by an embodiment of the utility model;

[0031] Figure 6 It is a structural schematic diagram of the valve cover provided by an embodiment of the utility model;

[0032] Figure 7It is a cross-sectional schematic diagram of the valve cover provided by the embodiment of the utility model;

[0033] Figure 8 It is a cross-sectional schematic diagram of a valve cover sleeve provided by an embodiment of the utility model;

[0034] Fig. 9 It is a structural schematic diagram of the valve cover sleeve provided by an embodiment of the utility model;

[0035] Fig.10 It is a structural schematic diagram of a magnetic key provided by an embodiment of the utility model.

[0036] In the figure:

[0037] 100, valve body assembly; 110, valve body; 111, flow channel; 120, valve cover; 121, mounting groove; 122, first limiting protrusion; 123, second limiting groove;

[0038] 200, valve stem assembly; 210, valve stem; 211, main body section; 212, middle section; 213, plug section; 220, valve core;

[0039] 300, valve cover sleeve; 301, second locking hole; 302, second limiting protrusion;

[0040] 400, connecting piece; 401, first locking hole; 402, plug-in hole; 4021, first plug-in hole; 4022, second plug-in hole; 403, first limiting groove;

[0041] 500, latch assembly; 510, magnetic latch; 511, latch body; 512, first magnetic steel; 520, elastic member;

[0042] 600, magnetic key; 610, key body; 611, plug-in slot; 612, receiving slot; 620, second magnet; 630, rotating handle. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] This embodiment provides a locking valve, which is used in various pipelines to cut off or connect the flow of media in the pipeline to prevent the theft of liquid media and cut off water supply when there is malicious arrears. The locking valve can be a gate valve, a ball valve or other valves with a locking function, which is not specifically limited here.

[0048] Figure 1 A schematic structural diagram of the locking valve provided in this embodiment is shown. Figure 2 A cross-sectional schematic diagram of the locking valve provided in this embodiment is shown. Figure 3 Shows Figure 2 A partial enlarged view at point A. Figure 1-Figure 3As shown, this embodiment provides a locking valve, which includes a valve body assembly 100 and a valve stem assembly 200. The valve body assembly 100 has a flow channel 111, and both ends of the flow channel 111 are used to connect to an external pipeline so that a liquid medium in the external pipeline can flow through the flow channel 111. The valve stem assembly 200 includes a valve stem 210 and a valve core 220 connected to the valve stem 210. The valve stem 210 is inserted into the valve body assembly 100, and the valve core 220 is located in the flow channel 111. By rotating the valve stem 210 in different directions around the axis, the valve core 220 can be lowered or raised, thereby cutting off or connecting the flow channel 111, realizing the cutoff or circulation of the liquid medium, thereby realizing the closing or opening of the locking valve.

[0049] In this embodiment, the valve stem 210 is threadedly connected to the valve core 220 , and the valve core 220 can be driven to move along the axial direction of the valve stem 210 by rotating the valve stem 210 .

[0050] In order to switch the locking valve between the locked state and the unlocked state, Figure 2-Figure 3 As shown, the locking valve further includes a valve cover sleeve 300, a connecting member 400 and a latch assembly 500. The valve cover sleeve 300 is rotatably sleeved on the outside of the valve body assembly 100; the connecting member 400 is arranged in the valve cover sleeve 300 and connected to one end of the valve stem 210 away from the valve core 220, a first locking hole 401 is arranged on the connecting member 400, and a second locking hole 301 opposite to the first locking hole 401 is arranged on the valve cover sleeve 300; the latch assembly 500 includes a magnetic latch 510 and an elastic member 520, the magnetic latch 510 is slidably arranged in the first locking hole 401, and the two ends of the elastic member 520 are respectively abutted against the magnetic latch 510 and the valve cover sleeve 300; in the unlocked state, the magnetic latch 510 can be partially inserted into the second locking hole 301 under the action of an external magnetic force; in the locked state, the magnetic latch 510 can be separated from the second locking hole 301 under the elastic action of the elastic member 520, so that the valve cover sleeve 300 rotates idly.

[0051] The locking valve provided in this embodiment, when the locking valve needs to be switched to the unlocked state, an external magnetic suction force is applied. Under the action of the magnetic suction force, the magnetic latch 510 overcomes the elastic force of the elastic member 520 and is partially inserted into the second locking hole 301. At this time, the valve cover sleeve 300 and the connecting member 400 form a rotation-restricted connection through the magnetic latch 510. The valve cover sleeve 300, the connecting member 400 and the valve stem 210 can rotate synchronously. By rotating the valve cover sleeve 300, the connecting member 400 and the valve stem 210 can be driven to rotate synchronously, thereby controlling the locking valve to be opened or closed. Closed; when the locking valve is switched from the unlocked state to the locked state, the external magnetic force can be cancelled, and the magnetic latch 510 can be separated from the second locking hole 301 under the elastic action of the elastic member 520. At this time, the valve cover sleeve 300 is disconnected from the connecting member 400, and the valve cover sleeve 300 can only rotate idly, while the connecting member 400 and the valve stem 210 will not rotate with the rotation of the valve cover sleeve 300, effectively avoiding the situation in which the magnetic steel serving as the latch is damaged due to a large external force in the locked state and the locking function fails, thereby improving the anti-theft ability of the locking valve.

[0052] Optionally, the height L of the magnetic latch 510 satisfies: L1<L<L2; wherein L1 is the distance between the top surface of the connector 400 and the inner top wall of the valve cover sleeve 300; and L2 is the distance between the bottom of the first locking hole 401 and the inner top wall of the valve cover sleeve 300. With this arrangement, on the one hand, when the locking valve is in the locked state, there will be a certain distance between the top of the magnetic latch 510 and the inner top wall of the valve cover sleeve 300. At this time, if the valve cover sleeve 300 is driven to rotate by a large external force, the valve cover sleeve 300 will not rub against the top of the magnetic latch 510 when rotating, thereby avoiding damage to the magnetic latch 510 and thus extending the service life of the locking valve; on the other hand, since the height L of the magnetic latch 510 is greater than the distance between the top surface of the connecting member 400 and the inner top wall of the valve cover sleeve 300, when the locking valve is switched from the locked state to the unlocked state, the magnetic latch 510 will not be completely accommodated in the second locking hole 301 due to excessive external magnetic suction, so as to ensure that when the locking valve is in the unlocked state, the magnetic latch 510 can be accommodated in the first locking hole 401 and the second locking hole 301 at the same time, thereby achieving the effect that the valve cover sleeve 300, the connecting member 400 and the valve stem 210 can rotate synchronously. The present embodiment does not limit the specific values ​​of L, L1 and L2, and designers can adjust the above values ​​according to actual processing requirements.

[0053] like Figure 3As shown, the cross-sectional shape of the magnetic latch 510 is T-shaped, the large diameter section of the magnetic latch 510 is arranged toward the first lock hole 401, and the elastic member 520 is sleeved on the small diameter section of the magnetic latch 510 and abuts on the step surface between the large diameter section and the small diameter section. By sleeved the elastic member 520 on the small diameter section of the magnetic latch 510, the elastic member 520 can be provided with support and position limiting functions to prevent the elastic member 520 from deforming in a direction deviating from its axis. In this embodiment, the elastic member 520 is a spring, which is easy to obtain and assemble, and can reduce processing costs.

[0054] Optionally, the magnetic latch 510 includes a latch body 511 and a first magnetic steel 512 embedded in the latch body 511. Specifically, the small diameter section of the latch body 511 is provided with a receiving hole, and the first magnetic steel 512 is adhered in the receiving hole of the latch body 511 to achieve a stable connection between the first magnetic steel 512 and the latch body 511.

[0055] Figure 4 A schematic structural diagram of a connecting member 400 provided in this embodiment is shown. Figure 5 2 is a schematic diagram of the structure of the valve stem 210 provided in the embodiment of the utility model. Figure 4-Figure 5 Combined with Figure 3 As shown, the connector 400 is provided with a plug hole 402 which can be plugged into the top of the valve stem 210, and at least a portion of the plug hole 402 is non-circular to achieve a stable connection between the connector 400 and the valve stem 210, and to ensure that the valve stem 210 can be driven to rotate synchronously when the connector 400 rotates. Specifically, the plug hole 402 includes a first plug hole 4021 and a second plug hole 4022 arranged up and down and connected, the first plug hole 4021 is a non-circular hole, and the second plug hole 4022 is a circular hole; the valve stem 210 includes a main section 211, an intermediate section 212 and a plug section 213 connected in sequence, the main section 211 is connected to the valve core 220 at one end away from the plug section 213, the plug section 213 has a non-circular cross section and the same shape as the first plug hole 4021, and the plug section 213 is plugged in with the first plug hole 4021; the intermediate section 212 is cylindrical and plugged in with the second plug hole 4022. 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, and this embodiment does not limit this.

[0056] Figure 6 FIG. 1 is a schematic structural diagram of the valve cover 120 provided in this embodiment. Figure 7 FIG. 1 is a cross-sectional schematic diagram of the valve cover 120 provided in this embodiment. Figure 6-Figure 7 Combined with Figure 3 , Figure 4As shown, the valve body assembly 100 includes a valve body 110 and a valve cover 120, and a flow channel 111 is opened on the valve body 110; the valve cover 120 is connected to the top of the valve body 110, and the valve cover 120 is provided with a mounting groove 121 for mounting the connector 400. By providing the mounting groove 121 on the valve cover 120, not only can the connector 400 be stably installed, but also the connector 400 can be positioned and limited, so as to facilitate the installation between the connector 400 and the valve cover 120, and prevent the displacement of the connector 400 during use, resulting in the magnetic latch 510 not being able to accurately extend into the second lock hole 301. Optionally, the valve cover 120 is threadedly connected to the valve body 110, and the threaded connection has the advantages of tight connection and convenient disassembly and assembly.

[0057] In this embodiment, a first limiting protrusion 122 is provided on the groove wall of the mounting groove 121, and a first limiting groove 403 matching the first limiting protrusion 122 is provided on the outer wall of the connecting member 400. This design can ensure that the connecting member 400 rotates stably in the mounting groove 121, and can limit its movement along the axial direction. Optionally, the first limiting protrusion 122 is an annular protrusion, and the first limiting groove 403 is an annular groove, so as to further ensure that the connecting member 400 can rotate stably in the mounting groove 121. Of course, in other embodiments, the first limiting protrusion 122 can also be provided on the outer wall of the connecting member 400, and the first limiting groove 403 can be provided on the groove wall of the mounting groove 121, and the above-mentioned effect can also be achieved.

[0058] Optionally, the connector 400 is a disc-shaped structure, which is convenient for processing and assembly, and can stably rotate in the mounting groove 121. The plug hole 402 is coaxially arranged with the disc-shaped connector 400 to ensure that the connector 400 is subjected to balanced force when driving the valve stem 210 to rotate, further improving the stability of its rotation process.

[0059] Figure 8 FIG. 2 shows a cross-sectional schematic diagram of the valve cover sleeve 300 provided in this embodiment. Figure 8 Combined with Figure 3 , Figure 7 As shown, in this embodiment, a second limiting protrusion 302 is provided on the inner wall of the valve cover sleeve 300 extending inward, and a second limiting groove 123 matching the second limiting protrusion 302 is provided on the outer wall of the valve cover 120. This design can ensure that the valve cover sleeve 300 rotates stably relative to the valve cover 120, and can limit its movement along the axial direction. Optionally, the second limiting protrusion 302 is an annular protrusion, and the second limiting groove 123 is an annular groove, so as to further ensure the stable rotation of the valve cover sleeve 300 relative to the valve cover 120. Of course, in other embodiments, the second limiting protrusion 302 can also be provided on the outer wall of the valve cover 120, and the second limiting groove 123 can be provided on the inner wall of the valve cover sleeve 300, and the above-mentioned effect can also be achieved.

[0060] Fig. 9 FIG. 1 is a schematic structural diagram of a valve cover sleeve 300 provided in this embodiment. Fig.10 FIG. 6 is a schematic diagram showing the structure of a magnetic key 600 provided in this embodiment. Figure 9-10 As shown, the locking valve further includes a magnetic key 600 that can be matched with the valve cover sleeve 300, and the magnetic key 600 can provide external magnetic force for the magnetic latch 510. The magnetic force between the magnetic key 600 and the magnetic latch 510 attracts each other, so that the locking valve is controlled to be opened or closed under the action of the magnetic key 600.

[0061] Specifically, the magnetic key 600 includes a key body 610 and a second magnetic steel 620 (refer to Figure 2 ), the key body 610 is provided with a plug-in slot 611 which can be plugged and matched with the valve cover sleeve 300, and the second magnetic steel 620 is embedded in the key body 610, and the second magnetic steel 620 and the magnetic latch 510 are magnetically attracted. When the locking valve needs to be switched to the unlocked state, the plug-in slot 611 of the magnetic key 600 can be aligned with the valve cover sleeve 300 so that the two can be plugged and matched, and the magnetic latch 510 can overcome the elastic force of the elastic member 520 under the magnetic attraction of the second magnetic steel 620, and partially extend into the second lock hole 301. At this time, the valve cover sleeve 300 and the connecting member 400 form a rotation-restricted connection through the magnetic latch 510, and the valve cover sleeve 300, the connecting member 400 and the valve stem 210 can rotate synchronously. The operator can rotate the magnetic key 600 to drive the valve cover sleeve 300 to rotate, thereby driving the connecting member 400 and the valve stem 210 to rotate synchronously, thereby achieving the effect of controlling the locking valve to be opened or closed.

[0062] Optionally, the cross-sectional shape of the plug-in slot 611 is non-circular, and the shape of the valve cover sleeve 300 is adapted to the shape of the plug-in slot 611, so as to ensure that after the magnetic key 600 is plugged into the valve cover sleeve 300, the valve cover sleeve 300 can be synchronously rotated by rotating the magnetic key 600. It should be explained that the non-circular shape can be a polygon such as a triangle or a hexagon, or a regular shape formed by alternating straight lines and curves, or an irregular shape formed by straight lines and curves, or a regular or irregular shape formed by curves, which is not limited in this embodiment.

[0063] In order to achieve stable installation of the second magnetic steel 620, a receiving groove 612 for receiving the second magnetic steel 620 is further provided at the bottom of the insertion groove 611; the second magnetic steel 620 is adhered in the receiving groove 612, and the connection is stable and easy to operate.

[0064] For the convenience of user operation, a rotating handle 630 is also provided on the key body 610, and the operator can hold the rotating handle 630 to rotate the key body 610. Optionally, there are two rotating handles 630, which are symmetrically arranged on both sides of the key body 610 about the axis of the key body 610, and the operator can operate with one hand or both hands.

[0065] like Figure 3 , Figure 4 as well as Fig.10 As shown, there are multiple first lock holes 401, and the multiple first lock holes 401 are arranged at intervals along the circumference of the connecting member 400, and each first lock hole 401 corresponds to a second lock hole 301 and a latch assembly 500. Correspondingly, the second magnetic steel 620 and the magnetic latch 510 are arranged in a one-to-one correspondence. This design can ensure the uniformity and stability of the force on the valve cover sleeve 300 and the connecting member 400 when the magnetic key 600 is turned. In this embodiment, the number of the first lock hole 401, the second lock hole 301, the latch assembly 500 and the second magnetic steel 620 is four, and the four first lock holes 401 are evenly spaced along the circumference of the connecting member 400, each first lock hole 401 is opposite to a second lock hole 301, and each magnetic latch 510 is opposite to a second magnetic steel 620. Of course, in other embodiments, the first lock hole 401, the second lock hole 301, the latch assembly 500 and the second magnetic steel 620 can also be arranged in two groups, three groups, five groups or more groups evenly distributed along the circumferential direction, which is not specifically limited here.

[0066] Combine the following Figure 1-Figure 10 Briefly describe the working principle of the lock valve:

[0067] 1) When it is necessary to switch from the locked state to the unlocked state, the operator can align the insertion slot 611 of the magnetic key 600 with the valve cover sleeve 300 so that the two can be plugged together. The magnetic latch 510 can overcome the elastic force of the elastic member 520 under the action of the magnetic attraction force of the second magnet 620 and partially extend into the second lock hole 301. At this time, the valve cover sleeve 300 and the connecting member 400 form a rotation-restricted connection through the magnetic latch 510. The valve cover sleeve 300, the connecting member 400 and the valve stem 210 can rotate synchronously. The operator can rotate the magnetic key 600 to drive the valve cover sleeve 300 to rotate, thereby driving the connecting member 400 and the valve stem 210 to rotate synchronously, thereby controlling the locking valve to be opened or closed.

[0068] 2) When it is necessary to switch from the unlocked state to the locked state, the operator can remove the magnetic key 600 from the valve cover sleeve 300, and the magnetic attraction of the second magnet 620 to the magnetic latch 510 disappears. The magnetic latch 510 can be reset under the elastic force of the elastic member 520 to disengage from the second lock hole 301 and only be accommodated in the first lock hole 401. At this time, the valve cover sleeve 300 is disconnected from the connecting member 400, and the valve cover sleeve 300 can only rotate idly, while the connecting member 400 and the valve stem 210 will not rotate with the rotation of the valve cover sleeve 300.

[0069] 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 locking valve, comprising a valve body assembly (100) and a valve stem assembly (200), wherein the valve body assembly (100) has a flow channel (111), and the valve stem assembly (200) comprises a valve stem (210) and a valve core (220) connected to the valve stem (210), wherein the valve stem (210) is inserted into the valve body assembly (100), and the valve stem (210) can drive the valve core (220) to open and close the flow channel (111) when it rotates, characterized in that: The locking valve further comprises: A valve cover sleeve (300) is rotatably sleeved outside the valve body assembly (100); a connecting member (400) disposed in the valve cover sleeve (300) and connected to an end of the valve stem (210) away from the valve core (220), the connecting member (400) being provided with a first locking hole (401), and the valve cover sleeve (300) being provided with a second locking hole (301) opposite to the first locking hole (401); A latch assembly (500) comprising a magnetic latch (510) and an elastic member (520), wherein the magnetic latch (510) is slidably disposed in the first lock hole (401), and two ends of the elastic member (520) are respectively abutted against the magnetic latch (510) and the valve cover sleeve (300); In the unlocked state, the magnetic latch (510) can be partially inserted into the second locking hole (301) under the action of an external magnetic force, so that when the valve cover sleeve (300) rotates, the valve stem (210) can be driven to rotate synchronously through the connecting member (400); in the locked state, the magnetic latch (510) can be disengaged from the second locking hole (301) under the elastic action of the elastic member (520), so that the valve cover sleeve (300) can rotate idly.

2. The lock valve according to claim 1, characterized in that: The cross-sectional shape of the magnetic latch (510) is T-shaped, the large diameter section of the magnetic latch (510) is arranged toward the first lock hole (401), and the elastic member (520) is sleeved on the small diameter section of the magnetic latch (510) and abuts against the step surface between the large diameter section and the small diameter section.

3. The lock valve according to claim 1, characterized in that: The magnetic latch (510) comprises a latch body (511) and a first magnetic steel (512) embedded in the latch body (511).

4. The lock valve according to claim 1, characterized in that: The height L of the magnetic latch (510) satisfies: L1<L<L2; Wherein, L1 is the distance between the top surface of the connecting piece (400) and the inner top wall of the valve cover sleeve (300); and L2 is the distance between the bottom of the first locking hole (401) and the inner top wall of the valve cover sleeve (300).

5. The lock valve according to claim 1, characterized in that: There are a plurality of the first locking holes (401), and the plurality of the first locking holes (401) are arranged at intervals along the circumference of the connecting member (400), and each of the first locking holes (401) corresponds to a second locking hole (301) and a latch assembly (500).

6. The lock valve according to claim 1, characterized in that: The connecting piece (400) is provided with a plug hole (402) that can be plugged into and matched with the top of the valve stem (210), and at least a portion of the plug hole (402) is non-circular.

7. The lock valve according to claim 1, characterized in that: The connecting piece (400) is a disc-shaped structure.

8. The lock valve according to claim 1, characterized in that: The valve body assembly (100) comprises: A valve body (110), wherein the flow channel (111) is opened on the valve body (110); A valve cover (120) is connected to the top of the valve body (110), and a mounting groove (121) for mounting the connecting member (400) is provided on the valve cover (120).

9. The lock valve according to claim 8, characterized in that: A first limiting protrusion (122) is provided on one of the groove wall of the installation groove (121) and the outer wall of the connecting member (400), and a first limiting groove (403) matching with the first limiting protrusion (122) is provided on the other.

10. The lock valve according to any one of claims 1 to 9, characterized in that: The locking valve further comprises a magnetic key (600) which is compatible with the valve cover sleeve (300), and the magnetic key (600) can provide external magnetic force for the magnetic latch (510).

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