Magnetic anti-theft opening and closing mechanism

Abstract

This utility model relates to the field of valve technology, and in particular to a convenient and highly secure magnetic anti-theft opening and closing mechanism, comprising a valve body, a valve stem, an upper valve cover, a lower valve cover, a valve plate, a round pin, a magnetic key, a first permanent magnet, a second permanent magnet, a first O-ring, a second O-ring, and a spring. The lower valve cover has a lower mounting hole located on the periphery of the valve stem, and the upper valve cover has an upper mounting hole communicating with the lower mounting hole. The spring and the first permanent magnet are disposed within the upper and lower mounting holes, respectively. The upper valve cover has a positioning hole located on the periphery of the valve stem. The magnetic key is detachably mounted on the upper valve cover, and the second permanent magnet is mounted on the magnetic key. The magnetic key has a positioning rod that mates with the positioning hole. When the positioning rod is inserted into the positioning hole, the second permanent magnet is positioned above the first permanent magnet, and the lower magnetic pole of the second permanent magnet is the same as the upper magnetic pole of the first permanent magnet.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a magnetic anti-theft opening and closing mechanism. Background Technology

[0002] Valves are control components in fluid transport systems, used to control the direction, pressure, and flow rate of fluids. Existing fluid control valves mainly include a valve body, valve cover, opening and closing element, valve stem, and opening device. The valve cover is located above the valve body. The opening and closing element is located between the inlet and outlet within the valve body. One end of the valve stem extends into the valve body and connects to the opening and closing element, while the other end extends out of the valve body and valve cover. The opening device is located on the free end of the valve stem on the valve cover. Typically, to enable designated personnel to manage valve opening and closing, restrict unauthorized operation, facilitate public utilities and community property management, and ensure planned energy allocation and transmission, a locking mechanism controlled by the opening device is often detachably mounted on top of the valve cover.

[0003] Traditional valve opening and closing mechanisms generally pose a risk of illegal operation. Conventional mechanical lock structures are easily damaged and lack sufficient waterproof performance. Existing magnetic locking valves mostly use single-stage magnetic control, which suffers from unlocking failure due to magnetic force attenuation. While the valve encryption mechanism disclosed in patent application number 201210345300.4 improves security with its dual-magnet unlocking structure, it does not solve the problem of the accuracy of the linkage between the valve stem and the magnet, making unlocking more difficult and less convenient to use. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model provides a magnetic anti-theft opening and closing mechanism that is convenient to use and highly secure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A magnetic anti-theft opening and closing mechanism includes a valve body, a valve stem, an upper valve cover, a lower valve cover, a valve plate, a pin, a magnetic key, a first permanent magnet, a second permanent magnet, a first O-ring, a second O-ring, and a spring. The valve body has an inlet, an outlet, a flow channel connecting the inlet and outlet, and an installation port communicating with the flow channel. The lower valve cover is positioned over the installation port of the valve body. The first O-ring is positioned between the valve body and the lower valve cover. The valve stem passes through the lower valve cover. The valve plate is connected to the lower end of the valve stem. The upper valve cover is positioned on the lower valve cover and connected to the upper end of the valve stem via a pin. The second O-ring... A sealing ring is disposed between the upper valve cover and the lower valve cover. The lower valve cover has a lower mounting hole located on the periphery of the valve stem. The upper valve cover has an upper mounting hole communicating with the lower mounting hole. The spring and the first permanent magnet are disposed in the upper mounting hole and the lower mounting hole, respectively. The upper valve cover has a positioning hole located on the periphery of the valve stem. The magnetic key is detachably disposed on the upper valve cover. The second permanent magnet is disposed on the magnetic key. The magnetic key has a positioning rod that mates with the positioning hole. When the positioning rod is inserted into the positioning hole, the second permanent magnet is distributed above the first permanent magnet, and the lower magnetic pole of the second permanent magnet is the same as the upper magnetic pole of the first permanent magnet.

[0007] Furthermore, the inner surface of the valve body located at the mounting port has a first inclined surface, and the valve plate has a second inclined surface, the inclination angle of the second inclined surface being greater than the inclination angle of the first inclined surface.

[0008] Furthermore, when the positioning rod is inserted into the positioning hole, the distance between the second permanent magnet and the first permanent magnet is 5mm to 25mm.

[0009] Furthermore, an annular groove is recessed on the circumferential surface of the valve stem at the lower valve cover, and a third O-ring is embedded in the annular groove.

[0010] Furthermore, both the first O-ring and the second O-ring are made of nitrile rubber.

[0011] Furthermore, the magnetic key has a recessed groove in the middle for the upper valve cover to be inserted.

[0012] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: This magnetic anti-theft opening and closing mechanism, by setting the first permanent magnet and the second permanent magnet to have the same polarity of magnetic repulsion, and simultaneously setting the first permanent magnet and the spring in the upper and lower mounting holes, in the process of unlocking with the magnetic key, the second permanent magnet pushes the first permanent magnet to compress the spring, realizing non-contact unlocking and avoiding the risk of violent damage to mechanical locks. By rotating the magnetic key counterclockwise, it drives the upper valve stem and the valve stem to rotate, causing the valve disc to lift and open the valve. And by rotating counterclockwise, it closes the valve. This technology, through the synergistic effect of the spring preload and the same polarity of magnetic repulsion, i.e., the spacing between the first permanent magnet and the second permanent magnet, generates a repulsive force of not less than 8N. Combined with the three-level sealing and the anti-tamper design of the positioning rod, it achieves an anti-theft standard force of valve opening and closing force greater than 50N and less than 300N, making the anti-theft security high. In addition, the cooperation between the positioning rod and the positioning hole of the magnetic key improves the convenience of use. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention, in which the magnetic key is omitted. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] The embodiment of this utility model is as follows:

[0017] refer to Figure 1 and Figure 2As shown, a magnetic anti-theft opening and closing mechanism includes a valve body 1, a valve stem 2, an upper valve cover 3, a lower valve cover 4, a valve plate 5, a round pin 6, a magnetic key 7, a first permanent magnet 8, a second permanent magnet 9, a first O-ring 10, a second O-ring 11, and a spring 12. The valve body 1 has an inlet 101, an outlet 102, a flow channel 103 connecting the inlet 101 and the outlet 102, and an installation port 104 communicating with the flow channel 103. The lower valve cover 4 is placed over the installation port 104 of the valve body 1. The first O-ring 11 is placed between the valve body 1 and the lower valve cover 4. The valve stem 2 passes through the lower valve cover 4. The valve plate 5 is connected to the lower end of the valve stem 2. The upper valve cover 3 is placed on the lower valve cover 4 and is connected to the upper end of the valve stem 2 through the round pin 6. The second O-ring 11 is placed... Between the upper valve cover 3 and the lower valve cover 4, the lower valve cover 4 is provided with a lower mounting hole 13 on the periphery of the valve stem 2, and the upper valve cover 3 is provided with an upper mounting hole 14 communicating with the lower mounting hole 13. The spring 12 and the first permanent magnet 8 are provided in the upper mounting hole 14 and the lower mounting hole 13. The upper valve cover 3 is provided with a positioning hole 15 on the periphery of the valve stem 2. The magnetic key 7 is detachably provided on the upper valve cover 3. The second permanent magnet 9 is provided on the magnetic key 7. The magnetic key 7 is provided with a positioning rod 16 that cooperates with the positioning hole 15. When the positioning rod 16 is inserted into the positioning hole 15, the second permanent magnet 9 is distributed on the upper side of the first permanent magnet 8, and the lower magnetic pole of the second permanent magnet 9 is the same as the upper magnetic pole of the first permanent magnet 8. The middle part of the magnetic key 7 is recessed with a groove 17 for the upper valve cover 3 to be embedded.

[0018] This magnetic anti-theft opening and closing mechanism utilizes the same-pole magnetic repulsion between a first permanent magnet 8 and a second permanent magnet 9. Simultaneously, the first permanent magnet 8 and a spring 12 are installed within the upper mounting hole 14 and lower mounting hole 13. During magnetic key unlocking, the second permanent magnet 9 pushes the first permanent magnet 8 to compress the spring, achieving non-contact unlocking and avoiding the risk of violent damage from mechanical locks. By rotating the magnetic key counterclockwise, the upper valve cover 3 and valve stem 2 rotate, causing the valve plate 5 to lift and open the valve. Counterclockwise rotation closes the valve. This technology, through the synergistic effect of the spring 12's preload and the same-pole magnetic repulsion (i.e., the spacing between the first permanent magnet 8 and the second permanent magnet 9), generates a repulsive force of no less than 8N. Combined with a three-stage sealing system and a positioning rod anti-tamper design, it achieves a valve opening and closing force greater than 50N and less than 300N, meeting the anti-theft standard force. This results in high anti-theft security. Furthermore, the cooperation between the magnetic key's positioning rod and the positioning hole enhances ease of use.

[0019] Furthermore, the inner surface of the valve body 1 located at the mounting port 104 has a first inclined surface 20, and the valve plate 5 has a second inclined surface 50. The inclination angle of the second inclined surface 50 is greater than that of the first inclined surface 20. The second inclined surface 50 of the valve plate 5 and the first inclined surface 20 of the valve body 1 form a progressive sealing contact, which reduces the fluid impact force at the moment of closing and improves the self-alignment capability of the valve plate 5 and the valve body 1.

[0020] It is worth noting that when the positioning rod 16 is inserted into the positioning hole 15, the distance between the second permanent magnet 9 and the first permanent magnet 8 is 5mm to 25mm, preferably 15mm. The optimized magnetic spacing reduces the magnetic force attenuation rate, and the unlocking operation torque is stable within this range, taking into account both preventing accidental touches and operational convenience.

[0021] Furthermore, an annular groove 18 is recessed on the circumferential surface of the valve stem 2 at the lower valve cover 4, and a third O-ring seal 19 is embedded in the annular groove 18. The third O-ring seal 19 in the annular groove forms a dynamic seal with the valve stem 2, which greatly reduces leakage under pressure fluctuation conditions.

[0022] Furthermore, both the first O-ring 10 and the second O-ring 11 are made of nitrile rubber. The nitrile rubber sealing ring has a compression set of ≤15% in the temperature range of -30℃ to 120℃, improves oil resistance by 3 times, extends the replacement cycle to 1.8 times that of traditional fluororubber, and maintains good dustproof and waterproof effects.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A magnetic anti-theft opening and closing mechanism, characterized in that: The valve body includes a valve body, valve stem, upper valve cover, lower valve cover, valve plate, pin, magnetic key, first permanent magnet, second permanent magnet, first O-ring, second O-ring, and spring. The valve body has an inlet, an outlet, a flow channel connecting the inlet and outlet, and an installation port communicating with the flow channel. The lower valve cover is positioned over the installation port of the valve body. The first O-ring is positioned between the valve body and the lower valve cover. The valve stem passes through the lower valve cover. The valve plate is connected to the lower end of the valve stem. The upper valve cover is positioned on the lower valve cover and connected to the upper end of the valve stem via a pin. The second O-ring is positioned on the upper valve cover. Between the valve cover and the lower valve cover, the lower valve cover has a lower mounting hole on its periphery of the valve stem, and the upper valve cover has an upper mounting hole communicating with the lower mounting hole. The spring and the first permanent magnet are disposed in the upper mounting hole and the lower mounting hole, respectively. The upper valve cover has a positioning hole on its periphery of the valve stem. The magnetic key is detachably disposed on the upper valve cover. The second permanent magnet is disposed on the magnetic key. The magnetic key has a positioning rod that mates with the positioning hole. When the positioning rod is inserted into the positioning hole, the second permanent magnet is distributed above the first permanent magnet, and the lower magnetic pole of the second permanent magnet is the same as the upper magnetic pole of the first permanent magnet.

2. The magnetic anti-theft opening and closing mechanism according to claim 1, characterized in that: The inner surface of the valve body located at the mounting port has a first inclined surface, and the valve plate has a second inclined surface, the inclination angle of the second inclined surface being greater than the inclination angle of the first inclined surface.

3. The magnetic anti-theft opening and closing mechanism according to claim 1 or 2, characterized in that: When the positioning rod is inserted into the positioning hole, the distance between the second permanent magnet and the first permanent magnet is 5mm to 25mm.

4. The magnetic anti-theft opening and closing mechanism according to claim 3, characterized in that: An annular groove is recessed on the circumferential surface of the valve stem at the lower valve cover, and a third O-ring is embedded in the annular groove.

5. The magnetic anti-theft opening and closing mechanism according to claim 4, characterized in that: Both the first O-ring and the second O-ring are made of nitrile rubber.

6. The magnetic anti-theft opening and closing mechanism according to claim 1, characterized in that: The magnetic key has a recessed groove in the middle for the upper valve cover to be inserted.

Images