One-way locking gate valve

Abstract

The utility model relates to the technical field of magnetic locking valves, in particular to a one-way locking gate valve which comprises a valve seat, a valve cover, a lock cap, a gate plate and a driving mechanism driving the gate plate to move up and down, the valve cover is connected to the top end of the valve seat, the lock cap is rotationally connected to the valve cover, and the valve cover is connected to the valve seat. The power input end of the driving mechanism penetrates through the valve cover to be connected with the lock cap, the power output end of the driving mechanism is connected with the gate plate, a plurality of containing grooves are formed in the top end of the valve cover, a plurality of limiting grooves corresponding to the containing grooves in position are formed in the bottom of the lock cap, and the gate plate is arranged in the limiting grooves. A first magnetic part is connected in the containing groove in a sliding mode, one end of the first magnetic part extends out and is clamped in the limiting groove, and one side of the limiting groove is provided with an inclined face allowing one end of the first magnetic part to slide in or slide out. The one-way opening or closing of the gate valve can be carried out under the emergency condition of the second magnetic piece, the application scene is wide, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic locking valves, and more specifically, to a one-way locking gate valve. Background Art

[0002] Gate valves are widely used in water supply systems. They are bidirectional valves, typically used to close or open water supply pipes for maintenance or repair. Ductile iron soft-seal gate valves are commonly used in water supply pipes. Ductile iron soft-seal threaded gate valves are crucial control components in water supply pipelines. Most valves on the market are in a free state, allowing anyone to open and close them at will, making management difficult.

[0003] The existing approach is to use magnetic locking gate valves for system management. However, commercially available magnetic locking valves operate based on the principle of like magnets repelling or opposite magnets attracting. These valves use magnets and springs as their primary components. In emergencies, spring failure, spring jamming, or forgotten keys can prevent the valve from opening and closing properly, potentially leading to serious accidents. For example, gate valves must be closed urgently to repair a ruptured pipeline; valves on fire water supply lines must remain open to prevent a water shortage in the event of a dangerous situation.

[0004] Prior art Chinese patent CN200920035227.4 discloses a magnetic lockable gate valve, which includes a valve body, a gate, a valve stem, a valve cover, and a locking cover; the valve stem in the valve body is threadedly connected to the gate, and the valve cover is threadedly connected to the valve body. The valve cover is characterized in that: the upper end surface of the valve cover is provided with four evenly distributed small holes, in which springs and pins are respectively installed; the lower end surface of the locking cover is provided with a small hole, in which a small magnet is installed; the top of the locking cover is provided with two clamping holes, and the valve stem is provided with a pin hole. The valve stem is fixed to the lock cover by a pin, and the cover shell is clamped at the lower end of the valve cover using the inverted cone principle. Two holes are provided on the top of the cover shell corresponding to the two clamping holes on the top of the lock cover, which is conducive to the clamping position when the magnetic key is unlocked; due to the adoption of the above technical solution, the opening and closing of the gate valve requires a special magnetic key, so that the opening and closing of the gate valve can be effectively forced to manage. Although the gate valve can realize opening and closing management, it cannot be closed or opened in one direction without a key in the face of an emergency, and its safety needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiency of the existing lockable gate valve that cannot be opened or closed in one direction without a key. The utility model proposes a one-way locking gate valve, which can be opened or closed in one direction without a key, has a wide range of application scenarios and high safety.

[0006] In order to achieve the above-mentioned purpose, a one-way locking gate valve of the present invention comprises a valve seat, a valve cover, a locking cap, a gate and a driving mechanism for driving the gate to move up and down, the valve cover is connected to the top of the valve seat, the locking cap is rotatably connected to the valve cover, the valve seat has a flow channel, the top of the valve seat is provided with a receiving cavity communicated with the flow channel, the driving mechanism is installed in the receiving cavity, the power input end of the driving mechanism passes through the valve cover and is connected to the locking cap, the power output end of the driving mechanism is connected to the gate, the valve The top of the cover is provided with several receiving grooves, and the bottom of the lock cap is provided with several limiting grooves corresponding to the positions of the respective receiving grooves. A first magnetic member is slidably connected to each of the receiving grooves, and a third magnetic member is fixed to the bottom of each of the receiving grooves. The third magnetic member is used to push the first magnetic member out of the receiving groove and stuck in the limiting groove. The lock cap is also provided with an inclined surface connected to the limiting groove. When the lock cap is twisted, the inclined surface can push the first magnetic member stuck in the limiting groove to completely enter the receiving groove.

[0007] In the present technical solution, the driving mechanism drives the gate plate to slide upward or downward to open or close the gate valve by rotating clockwise or counterclockwise, wherein the rotation of the driving mechanism in one direction corresponds to opening or closing the gate valve, that is, clockwise rotation is not limited to opening the gate valve but can also close the gate valve. When there is no second magnetic member, the lock cap is in a locked state, the polarity of the opposite ends of the third magnetic member and the first magnetic member are the same, and the third magnetic member uses the principle of like charges repel each other to push the first magnetic member out of the receiving groove, and one end of the first magnetic member extends out of the receiving groove. When the lock cap is rotated counterclockwise, one end of the first magnetic part will slide into the limiting groove along the inclined surface. At this time, the first magnetic part is blocked by the inner wall surface of one side of the limiting groove so that the lock cap cannot continue to rotate. If the lock cap is rotated clockwise, one end of the first magnetic part will slide out of the limiting groove along the inclined surface and press against the bottom end surface of the lock cap. Then the first magnetic part slides into the limiting groove again and slides out from the inclined surface on one side of the limiting groove. The one-way rotation is realized over and over again.

[0008] As a preferred solution, each of the inclined surfaces is arranged along the clockwise rotation direction or the counterclockwise rotation direction of the lock cap, and the direction of the inclined surface can be set according to the application scenario to achieve one-way opening or closing.

[0009] As a preferred solution, in order to realize the opening or closing of the gate valve, the driving mechanism is a spiral transmission mechanism, which includes a screw rod positioning nut and a screw rod. The screw rod positioning nut is fixed on the valve cover, and the upper part of the screw rod passes through the valve cover and is connected to the lock cap. The middle part of the screw rod and the screw rod positioning nut constitute the spiral transmission mechanism. The gate plate is slidably connected in the flow channel. The gate plate is provided with a threaded hole adapted to the lower part of the screw rod. The lower part of the screw rod is threadedly connected to the gate plate, and the screw rod converts rotation into up and down sliding of the gate plate.

[0010] As a preferred solution, the middle part of the screw rod has a positioning portion extending toward the periphery, and the positioning portion is rotatably connected to the screw rod positioning nut. The screw rod positioning nut can support the screw rod and limit it to prevent the screw rod from sliding up and down.

[0011] As a preferred solution, in order to achieve the fixation of the screw rod and the lock cap, a pin is provided between the screw rod and the lock cap, the top end of the screw rod and the lock cap are fixed by plugging the pin, and the screw rod and the lock cap can be separated by removing the pin for easy maintenance.

[0012] As a preferred solution, there are three accommodating grooves, each of which is evenly arranged on the top end surface of the valve cover. The first magnetic member in each accommodating groove can disperse the torque to avoid stress concentration on a single first magnetic member and cause damage.

[0013] As a preferred solution, in order to enhance the sealing of the connection to prevent internal parts from rusting, a first sealing ring is provided at the connection between the lock cap and the valve cover, a second sealing ring is provided at the connection between the valve cover and the valve seat, and a third sealing ring is provided at the connection between the screw rod and the valve cover.

[0014] As a preferred solution, in order to facilitate the rotation of the lock cap, a key is further included, and a second magnetic piece corresponding to the position of the limiting groove is embedded in the bottom of the key.

[0015] As a preferred solution, in order to make the first magnetic part disengage from the limiting groove, the magnetic force between the second magnetic part and the first magnetic part is greater than the magnetic force between the third magnetic part and the first magnetic part so that when the first magnetic part is subjected to magnetic force at both ends, the magnetic force on one side is stronger to ensure that it is retracted into the accommodating groove to avoid interfering with the rotation of the lock cap.

[0016] As a preferred solution, the top of the lock cap is provided with a protrusion for screwing, the middle of the key is provided with a socket adapted to the structure of the protrusion, and the side wall of the key is fixed with an extension rod. When the socket is stuck in the protrusion, under the action of the second magnetic part, the first magnetic part disengages from the limiting groove, and the spiral rotation mechanism can be rotated effortlessly through the extension rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The one-way locking gate valve of the utility model blocks the lock cap from driving the driving mechanism to rotate in one direction by one end of the first magnetic member being stuck in the limit groove. The first magnetic member can slide out of the limit groove through the inclined surface to realize rotation in the other direction, thereby enabling the lock cap to rotate in one direction without a key to realize one-way opening or closing of the gate valve.

[0019] 2. The key equipped with the second magnetic part can push the first magnetic part out of the limiting groove, so that the lock cap can rotate freely, thereby realizing the free opening or closing of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the one-way locking gate valve of the utility model;

[0021] Figure 2 yes Figure 1 Explosion diagram of

[0022] Figure 3 It is a cross-sectional view of the one-way locking gate valve of the utility model;

[0023] Figure 4 It is a structural diagram of the lock cap;

[0024] Figure 5 yes Figure 4 The enlarged schematic diagram of part A in the figure is as follows:

[0025] Figure 6 It is a schematic diagram of the key structure.

[0026] In the figure: valve seat 1; flow channel 11; valve cover 12; accommodating groove 121; accommodating chamber 13; first magnetic member 14; third magnetic member 15; lock cap 2; screw rod positioning nut 21; screw rod 22; positioning portion 221; limiting groove 23; inclined surface 231; pin 24; protrusion 25; key 3; jack 31; extension rod 32; second magnetic member 33; first sealing ring 4; second sealing ring 5; third sealing ring 6; gate plate 7; threaded hole 71. DETAILED DESCRIPTION

[0027] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0030] Example 1:

[0031] like Figures 1 to 3 As shown, this embodiment provides a one-way locking gate valve, including a valve seat 1, a valve cover 12, a lock cap 2, a gate 7 and a driving mechanism for driving the gate 7 to move up and down, the valve cover 12 is connected to the top of the valve seat 1, the lock cap 2 is rotatably connected to the valve cover 12, the valve seat 1 has a flow channel 11, the top of the valve seat 1 is provided with a accommodating cavity 13 connected to the flow channel 11, the driving mechanism is installed in the accommodating cavity 13, the power input end of the driving mechanism passes through the valve cover 12 and is connected to the lock cap 2, the power output end of the driving mechanism is connected to the gate 7, the top of the valve cover 12 is provided with a plurality of accommodating grooves 121, the bottom of the lock cap 2 is provided with a plurality of accommodating grooves 121 connected to each of the accommodating grooves 1 The locking cap 2 is provided with a limit groove 23 corresponding to the position of the lock cap 21, and each of the accommodating grooves 121 is respectively slidably connected with a first magnetic member 14, and a third magnetic member 15 is respectively fixed to the bottom of each of the accommodating grooves 121, and the third magnetic member 15 is used to push the first magnetic member 14 out of the accommodating groove 121 and stuck in the limit groove 23. The lock cap 2 is also provided with an inclined surface 231 connected to the limit groove 23. When the lock cap 2 is twisted, the inclined surface 231 can push the first magnetic member 14 stuck in the limit groove 23 to completely enter the accommodating groove 121. It also includes a second magnetic member 33 movably mounted on the lock cap 2, and the second magnetic member 33 is used to push the first magnetic member 14 out of the limit groove 23.

[0032] In this embodiment, the two ends of the flow channel 11 are respectively connected to the water pipes, the accommodating chamber 13 is arranged perpendicular to the flow channel 11, the locking cap 2 can drive the driving mechanism to realize the opening or closing of the gate valve, and the top end of the third magnetic component 15 has the same polarity as the bottom end of the first magnetic component 14. Since the third magnetic component 15 and the first magnetic component 14 repel each other due to the same polarity, one end of the first magnetic component 14 extends out of the accommodating groove 121.

[0033] Specifically, such as Figure 4 、 5 As shown, each of the inclined surfaces 231 is arranged along the clockwise rotation direction of the lock cap 2 .

[0034] In this embodiment, when the key 3 is not used, the lock cap 2 is in a locked state, one end of the first magnetic member 14 extends out of the accommodating groove 121 and presses against the bottom end surface of the lock cap 2. When the lock cap 2 is rotated counterclockwise, the first magnetic member 14 slides along the bottom end surface of the lock cap 2 for a short distance and then slides into the limiting groove 23 along the inclined surface 231. Due to the inner wall surface of the limiting groove 23 away from the inclined surface 231, the relative sliding of the first magnetic member 14 is blocked, thereby preventing the lock cap 2 from rotating counterclockwise. When the lock cap 2 is rotated clockwise, if the first magnetic part 14 is originally in the limiting groove 23, the first magnetic part 14 will slide out of the limiting groove 23 along the inclined surface 231. As the lock cap 2 continues to rotate, the first magnetic part 14 will slide into another limiting groove 23 and then slide out from the inclined surface 231 of the limiting groove 23, and repeat this cycle, thereby realizing clockwise unidirectional rotation, so that the gate valve can be opened unidirectionally in the locked state. It is suitable for fire water supply pipelines and can also be opened in an emergency to supply water.

[0035] Specifically, the driving mechanism is a spiral transmission mechanism, which includes a screw positioning nut 21 and a screw 22. The screw positioning nut 21 is fixed on the valve cover 12. The upper part of the screw 22 passes through the valve cover 12 and is connected to the lock cap 2. The middle part of the screw and the screw positioning nut 21 constitute the spiral transmission mechanism. The gate plate 7 is slidably connected in the flow channel 11. The gate plate 7 is provided with a threaded hole 71 adapted to the lower part of the screw 22. The lower part of the screw 22 is threadedly connected to the gate plate 7.

[0036] In this embodiment, the flow channel 11 is provided with a chute corresponding to the position of the accommodating cavity 13, and the gate plate 7 is slidably connected to the chute, wherein the gate plate 7 is made of elastic material and has strong sealing performance.

[0037] Specifically, a positioning portion 221 extending toward the periphery is provided in the middle of the screw rod 22 , and the positioning portion 221 is rotatably connected to the screw rod positioning nut 21 .

[0038] In this embodiment, if Figure 2 、 3 As shown, the lower half of the screw rod 22 is provided with a thread, which cooperates with the threaded hole 71 of the gate plate 7 to convert the rotation of the screw rod 22 into the up and down sliding of the gate plate 7. The screw rod positioning nut 21 is provided with an annular groove adapted to the positioning portion 221.

[0039] Specifically, a pin shaft 24 is provided between the screw rod 22 and the lock cap 2 , and the top end of the screw rod 22 and the lock cap 2 are plugged and fixed via the pin shaft 24 .

[0040] In this embodiment, the screw rod and the locking cap 2 can be separated by removing the pin shaft 24 for maintenance.

[0041] Specifically, three accommodating grooves 121 are provided, and each of the accommodating grooves 121 is evenly arranged on the top end surface of the valve cover 12 .

[0042] In this embodiment, the three receiving grooves 121 are arranged in a circular array, such as Figure 4 As shown, three limiting grooves 23 are provided and arranged in a circular array.

[0043] Specifically, a first sealing ring 4 is provided at the connection between the lock cap 2 and the valve cover 12 , a second sealing ring 5 is provided at the connection between the valve cover 12 and the valve seat 1 , and a third sealing ring 6 is provided at the connection between the screw rod 22 and the valve cover 12 .

[0044] In this embodiment, the lock cap 2 is screwed onto the valve cover 12, the second sealing ring 5 is provided at the threaded connection between the valve cover 12 and the valve seat 1, and the first sealing ring 4, the second sealing ring 5 and the third sealing ring 6 can increase the sealing performance of the gate valve.

[0045] Specifically, the key 3 is further included. The key 3 is connected to the top of the lock cap 2 , and a second magnetic member 33 corresponding to the position of the limiting groove 23 is embedded in the bottom of the key 3 .

[0046] In this embodiment, the key 3 can be stuck on the top of the lock cap 2. At this time, the lock cap 2 is in the unlocked state. The second magnetic parts 33 correspond to the positions of the first magnetic parts 14 respectively. The key 3 drives the lock cap 2 to rotate freely.

[0047] In this embodiment, parallel end surfaces are provided on both sides of the protrusion 25, which facilitates clamping with other tools when the key 3 is not present and prevents slipping.

[0048] Specifically, the magnetic force between the second magnetic member 33 and the first magnetic member 14 is greater than the magnetic force between the third magnetic member 15 and the first magnetic member 14 .

[0049] In this embodiment, the bottom end of the second magnetic member 33 has the same polarity as the top end of the first magnetic member 14 , and the second magnetic member 33 and the first magnetic member 14 repel each other with the same polarity, so the first magnetic member 14 is separated from the limiting groove 23 and pressed into the receiving groove 121 .

[0050] Specifically, such as Figure 6As shown, a protrusion 25 for screwing is provided on the top of the lock cap 2 , a socket 31 adapted to the structure of the protrusion 25 is provided in the middle of the key 3 , and an extension rod 32 is fixed to the side wall of the key 3 .

[0051] In this embodiment, after the socket 31 cooperates with the protrusion 25, the torque can be better transmitted to avoid slipping, and the extension rod 32 can extend the lever arm to achieve a labor-saving effect.

[0052] Example 2:

[0053] This embodiment is similar to the first embodiment, except that, in this embodiment, each of the inclined surfaces 231 is arranged along the counterclockwise rotation direction of the locking cap 2 .

[0054] In this embodiment, when the second magnetic member 33 is not used, the lock cap 2 is in a locked state, one end of the first magnetic member 14 extends out of the accommodating groove 121 and presses against the bottom end surface of the lock cap 2. When the lock cap 2 is rotated clockwise, the first magnetic member 14 slides a short distance along the bottom end surface of the lock cap 2 and then slides into the limiting groove 23 along the inclined surface 231. Due to the inner wall surface of the limiting groove 23 away from the inclined surface 231, the relative sliding of the first magnetic member 14 is restricted, thereby preventing the lock cap 2 from rotating clockwise; When the lock cap 2 is rotated clockwise, if the first magnetic member 14 is originally in the limiting groove 23, the first magnetic member 14 will slide out of the limiting groove 23 along the inclined surface 231. As the lock cap 2 continues to rotate, the first magnetic member 14 will slide into another limiting groove 23 and then slide out from the inclined surface 231 of the limiting groove 23, and repeat this cycle, thereby realizing counterclockwise unidirectional rotation, so that the gate valve can also be closed in one direction in the locked state. It is suitable for underground water pipes. If the water pipe is broken and needs to be repaired, the gate valve can be closed urgently.

[0055] Example 3:

[0056] This embodiment is similar to embodiment 1, except that, in this embodiment, the third magnetic member 15 can also be a spring. The spring is in a compressed state, the bottom of the spring is fixed to the bottom of the accommodating groove 121, and the top of the spring abuts against the bottom of the first magnetic member 14. The tensioning force of the spring can push one end of the first magnetic member 14 out of the accommodating groove 121.

[0057] Example 4:

[0058] This embodiment is similar to embodiment 1, except that, in this embodiment, the valve seat 1 and the valve cover 12 are precision-cast stainless steel, which improves the sanitary performance of the water supply system and extends its service life.

[0059] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A one-way locking gate valve, characterized in that: The invention comprises a valve seat (1), a valve cover (12), a locking cap (2), a gate plate (7) and a driving mechanism for driving the gate plate (7) to move up and down, wherein the valve cover (12) is connected to the top of the valve seat (1), the locking cap (2) is rotatably connected to the valve cover (12), the valve seat (1) has a flow channel (11), the top of the valve seat (1) is provided with a receiving cavity (13) communicating with the flow channel (11), the driving mechanism is installed in the receiving cavity (13), the power input end of the driving mechanism passes through the valve cover (12) and is connected to the locking cap (2), the power output end of the driving mechanism is connected to the gate plate (7), the top of the valve cover (12) is provided with a plurality of receiving grooves (121), the The bottom of the lock cap (2) is provided with a plurality of limiting grooves (23) corresponding to the positions of the respective accommodating grooves (121), and a first magnetic member (14) is slidably connected to each of the accommodating grooves (121). A third magnetic member (15) is fixed to the bottom of each of the accommodating grooves (121), and the third magnetic member (15) is used to push the first magnetic member (14) out of the accommodating groove (121) and stuck in the limiting groove (23). The lock cap (2) is also provided with an inclined surface (231) communicating with the limiting groove (23). When the lock cap (2) is twisted, the inclined surface (231) can push the first magnetic member (14) stuck in the limiting groove (23) to completely enter the accommodating groove (121).

2. A one-way locking gate valve according to claim 1, characterized in that: Each of the inclined surfaces (231) is arranged along the clockwise rotation direction or the counterclockwise rotation direction of the lock cap (2).

3. A one-way locking gate valve according to claim 1, characterized in that: The driving mechanism is a spiral transmission mechanism, which includes a screw positioning nut (21) and a screw (22). The screw positioning nut (21) is fixed on the valve cover (12). The upper part of the screw (22) passes through the valve cover (12) and is connected to the lock cap (2). The middle part of the screw and the screw positioning nut (21) constitute the spiral transmission mechanism. The gate (7) is slidably connected in the flow channel (11). The gate (7) is provided with a threaded hole (71) adapted to the lower part of the screw (22). The lower part of the screw (22) is threadedly connected to the gate (7).

4. A one-way locking gate valve according to claim 3, characterized in that: The middle portion of the screw rod (22) has a positioning portion (221) extending toward the periphery, and the positioning portion (221) is rotatably connected to the screw rod positioning nut (21).

5. The one-way locking gate valve according to claim 3, characterized in that: A pin shaft (24) is provided between the screw rod (22) and the lock cap (2), and the top end of the screw rod (22) and the lock cap (2) are plugged and fixed via the pin shaft (24).

6. A one-way locking gate valve according to claim 1, characterized in that: There are three accommodating grooves (121), and each accommodating groove (121) is evenly arranged on the top end surface of the valve cover (12).

7. The one-way locking gate valve according to claim 3, characterized in that: A first sealing ring (4) is provided at the connection between the lock cap (2) and the valve cover (12), a second sealing ring (5) is provided at the connection between the valve cover (12) and the valve seat (1), and a third sealing ring (6) is provided at the connection between the screw rod (22) and the valve cover (12).

8. The one-way locking gate valve according to claim 1, characterized in that: It also includes a key (3), the key (3) is connected to the top of the lock cap (2), and the bottom of the key (3) is embedded with a second magnetic part (33) corresponding to the position of the limiting groove (23).

9. The one-way locking gate valve according to claim 8, characterized in that: The magnetic force between the second magnetic member (33) and the first magnetic member (14) is greater than the magnetic force between the third magnetic member (15) and the first magnetic member (14).

10. The one-way locking gate valve according to claim 9, characterized in that: The top of the lock cap (2) is provided with a protrusion (25) for screwing, the middle of the key (3) is provided with a socket (31) that is structurally compatible with the protrusion (25), and the side wall of the key (3) is fixed with an extension rod (32).

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