Manual and pneumatic butterfly valve device for adjusting water inflow

Abstract

The manual and pneumatic butterfly valve device comprises a butterfly valve body, a hand wheel driving assembly, a pneumatic assembly, a transmission mechanism and a lifting clutch mechanism, the pneumatic assembly is in driving connection with the butterfly valve body through the transmission mechanism, and the hand wheel driving assembly is in transmission connection with the transmission mechanism through the lifting clutch mechanism. According to the technical scheme, by designing the mechanical transmission connection relation between hand wheel drive and clutch transmission, connection with a butterfly valve transmission mechanism is achieved when a hand wheel is pressed downwards, and rotation is facilitated by rotating the hand wheel to drive a butterfly valve plate to rotate; according to the pressing self-locking mechanism, midway self-locking of the pressing transmission rod is achieved through opening and closing of the movable spring bolt, only matching of mechanical parts is adopted in the pressing operation process, the structure is reasonable and reliable, and operation is easy.

Description

Technical Field

[0001] This invention relates to the field of butterfly valve technology, and more specifically to a manual / pneumatic butterfly valve device for regulating water inlet. Background Technology

[0002] A butterfly valve is a type of valve that uses a disc-shaped opening and closing element to rotate approximately 90° to open, close, or regulate the flow of media. Butterfly valves are not only simple in structure, small in size, lightweight, economical in material consumption, compact in installation dimensions, low in driving torque, and easy and quick to operate, but they also simultaneously possess excellent flow regulation and sealing characteristics, making them one of the fastest-growing valve types in the past decade. The use of butterfly valves is very widespread. The variety and quantity used continue to expand, and they are developing towards high temperature, high pressure, large diameter, high sealing performance, long service life, excellent regulation characteristics, and multi-functional applications. Their reliability and other performance indicators have reached a high level.

[0003] A pneumatic butterfly valve consists of a pneumatic actuator and a butterfly valve. It uses a circular disc that rotates with the valve stem to open and close, achieving the desired action. Primarily used as a shut-off valve, it can also be designed to have regulating or combined shut-off and regulating functions. Butterfly valves are increasingly used in low-pressure, large- and medium-diameter pipelines. Most existing pneumatic butterfly valves are simply a butterfly valve and an actuator, controlled solely by a pneumatic power source. When the pneumatic power source fails, the entire pneumatic valve will also fail, potentially leading to unpredictable accidents.

[0004] Existing manual and pneumatic butterfly valve switching methods mostly use a combination of handwheel and bevel gear to achieve direct manual control of the valve stem via the side handwheel. This switching method is difficult to operate manually and is hard to lock, and its safety and reliability need to be improved.

[0005] In particular, for hand-operated and pneumatic butterfly valves in deep wells, toxic and harmful gases inside the well can cause personal injury or death. Furthermore, the confined space inside the well greatly increases the risk of workplace accidents and makes rescue difficult. Therefore, a new design for the clutch control of butterfly valves in deep wells is needed. Summary of the Invention

[0006] The purpose of this invention is to provide a manual / pneumatic butterfly valve device for regulating water intake. Utilizing a handwheel drive assembly and a lifting clutch assembly for transmission, it allows for flexible engagement and disengagement of the handwheel control and transmission mechanism, flexibly switching between manual and pneumatic actuation of the butterfly valve. This results in labor-saving operation and high safety. Operators only need to operate from the ground, eliminating the need to descend into the deep well.

[0007] To achieve the above objectives, the present invention is specifically implemented through the following technical solutions:

[0008] A hand-operated pneumatic butterfly valve device for regulating water inlet includes a butterfly valve body, a handwheel drive assembly, a pneumatic assembly, a transmission mechanism, and a lifting clutch mechanism. The pneumatic assembly is driven to the butterfly valve body through the transmission mechanism, and the handwheel drive assembly is driven to the transmission mechanism through the lifting clutch mechanism.

[0009] The handwheel drive assembly includes a handwheel, a downward transmission rod, and a reducer assembly. The downward transmission rod is installed at the bottom of the handwheel and is vertically and movably installed on the reducer assembly and is connected to the reducer assembly in a transmission manner. A lifting pressure plate is fixedly installed on one side of the lower drive assembly.

[0010] The lifting clutch mechanism includes a lifting crank, a lifting connecting rod assembly, and an eccentric clutch assembly that are hinged in sequence. A limiting and fixing frame is provided on the outside of the lifting connecting rod assembly and the eccentric clutch assembly. The limiting and fixing frame is fixedly installed on the housing between the transmission mechanism and the reducer assembly. One end of the eccentric clutch assembly is connected to the reducer assembly, and the other end is connected to the transmission mechanism.

[0011] Furthermore, the lifting crank has an L-shaped structure, with its middle part hinged to the limiting and fixing frame; the top of the lifting crank abuts against the lifting pressure plate, and the bottom is hinged to one end of the lifting connecting rod assembly.

[0012] Furthermore, the lifting linkage assembly includes a front linkage, a first lifting rod, a second lifting rod, a clutch lever linkage, and a tension spring. One end of the front linkage is hinged to the end of the lifting crank, and the other end is hinged to one end of the first lifting rod, the second lifting rod, and the tension spring. The other end of the first lifting rod is hinged to a limiting fixing frame, and the other end of the second lifting rod is hinged to the top of the clutch lever linkage. The other end of the tension spring is fixed to the bottom of the limiting fixing frame. The clutch lever linkage is vertically arranged, and its other end is hinged to one side of the eccentric clutch assembly.

[0013] Furthermore, the clutch eccentric assembly includes a clutch lever, an eccentric wheel shaft, and a universal coupling. One end of the universal coupling is connected to the reducer assembly, and the other end is connected to the transmission mechanism. The eccentric wheel shaft is installed between the universal coupling and the transmission mechanism. One end of the clutch lever is radially fixed to one side of the eccentric wheel shaft, and the other end is hinged to the lifting linkage assembly.

[0014] Furthermore, a turbine clutch assembly is provided within the transmission mechanism. The turbine clutch assembly includes a transmission turbine and a clutch worm gear disposed on one side of the transmission turbine. The clutch worm gear is fixedly connected to one end of the eccentric clutch assembly.

[0015] Furthermore, a pressing self-locking mechanism is installed between the handwheel drive assembly and the lifting clutch mechanism.

[0016] Furthermore, the downward self-locking mechanism includes a limiting fixed plate, a movable locking tongue, a movable limiting frame, a return spring, and a limiting latch. The limiting fixed plate is vertically fixed to the housing of the reducer assembly. The movable locking tongue is movably disposed within the limiting fixed plate via a connecting rod, with the top of the connecting rod fixedly connected to the downward transmission rod. The movable limiting frame is disposed at the bottom of the movable locking tongue, with the top of the return spring connected to the limiting fixed plate and the bottom connected to the movable limiting frame. The limiting latches are two sets symmetrically disposed on the outside of the movable limiting frame.

[0017] Furthermore, two locking tongue limiting blocks are symmetrically arranged on the top of the limiting and fixing plate, and a locking tongue groove is formed between the two locking tongue limiting blocks.

[0018] Furthermore, the movable latch includes two movable tongues, which are connected in a scissor-like manner in the middle and connected to the bottom of the connecting rod. A limit bracket hook is provided at the bottom of the movable latch.

[0019] Furthermore, the movable limit frame is located at the bottom of the movable locking tongue, with its middle part vertically movably mounted on the limit fixing plate. The movable limit frame has a locking tongue connecting groove that cooperates with the lock hook of the limit frame. The top end of the return spring is connected to the limit fixing plate, and the bottom end is connected to the movable limit frame.

[0020] The technical solution of this invention designs a mechanical transmission connection between the handwheel drive and the clutch transmission. When the handwheel is pressed down, it connects with the butterfly valve transmission mechanism, facilitating rotation by driving the butterfly valve plate to rotate. Both the handwheel and the pressing transmission rod are flexibly detachable, allowing for easy replacement of the transmission rod to suit different well depths. They can also be removed after operation to avoid affecting the well cover's coverage.

[0021] The self-locking mechanism of this invention uses the opening and closing of the movable locking tongue to achieve mid-course self-locking of the pressing transmission rod. Its pressing operation process only uses the cooperation of mechanical parts, and the structure is reasonable and reliable. The operator only needs to complete the pressing action to achieve the self-locking and unlocking functions, which is simple to operate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the transmission connection of the lifting clutch mechanism in this invention;

[0024] Figure 3 This is a schematic diagram of another transmission connection of the lifting clutch mechanism in this invention;

[0025] Figure 4 This is a schematic diagram of another state of transmission connection of the lifting clutch mechanism in this invention;

[0026] Figure 5 This is a schematic diagram of the downward self-locking mechanism in this invention;

[0027] Figure 6 This is a schematic diagram of the back structure of the limiting and fixing plate of the pressing self-locking mechanism in this invention.

[0028] Figure 7 This is a schematic diagram of the locking process of the downward self-locking mechanism in this invention;

[0029] Figure 8 This is a schematic diagram of the locking state of the downward self-locking mechanism in this invention;

[0030] Figure 9 This is a schematic diagram of the unlocking process of the downward self-locking mechanism in this invention.

[0031] In the diagram, 1-Butterfly valve body; 2-Handwheel drive assembly; 21-Handwheel; 22-Press transmission rod; 23-Reducer assembly; 24-Lifting pressure plate; 3-Lifting clutch mechanism; 31-Lifting crank; 32-Lifting connecting rod assembly; 321-Front connecting rod; 322-First lifting rod; 323-Second lifting rod; 324-Clutch handle connecting rod; 325-Tension spring; 33-Eccentric clutch assembly; 331-Clutch lever; 332-Eccentric wheel shaft; 3 33-Universal coupling; 34-Limit fixing bracket; 4-Pneumatic assembly; 5-Transmission mechanism; 51-Transmission turbine; 52-Clutch worm gear; 6-Pressing self-locking mechanism; 61-Limit fixing plate; 611-Lock tongue limit block; 612-Lock tongue groove; 62-Modible lock tongue; 621-Modible tongue; 622-Limit bracket lock hook; 63-Modible limit bracket; 631-Lock tongue connecting groove; 64-Return spring; 65-Limit latch; 66-Connecting rod. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0035] In embodiments of the present 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," "on top of," and "over" 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.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] like Figures 1 to 9 As shown, a pneumatic / manual butterfly valve device for regulating water inlet according to the present invention includes a butterfly valve body 1, a handwheel drive assembly 2, a lifting clutch mechanism 3, a pneumatic assembly 4, and a transmission mechanism 5. The pneumatic assembly 4 is driven by the butterfly valve body 1 through the transmission mechanism 5, and the handwheel drive assembly 2 is driven by the lifting clutch mechanism 3. The butterfly valve is driven by the pneumatic assembly 4 on one hand, and can be switched to be driven by the handwheel drive assembly 2 under the clutch control of the lifting clutch mechanism 3.

[0038] The handwheel drive assembly 2 includes a handwheel 21, a downward transmission rod 22, and a reducer assembly 23. The downward transmission rod 22 is detachably mounted on the bottom of the handwheel 21. The downward transmission rod 22 is vertically and detachably mounted on the reducer assembly 23 through a slot, and is connected to the reducer assembly 23 in a transmission connection. A lifting pressure plate 24 is fixedly mounted on one side of the rod. In this embodiment, the handwheel drive assembly 2 connects to the transmission mechanism 5 after being pressed down. Rotating the handwheel 21 causes the reducer assembly 23 to drive the transmission mechanism 5 to open and close the butterfly valve plate.

[0039] The lifting clutch mechanism 3 includes a lifting crank 31, a lifting connecting rod assembly 32, and an eccentric clutch assembly 33, which are sequentially hinged. A limiting and fixing bracket 34 is provided on the outer side of the lifting connecting rod assembly 32 and the eccentric clutch assembly 33. The limiting and fixing bracket 34 is fixedly installed on the housing between the transmission mechanism 5 and the reducer assembly 23. One end of the eccentric clutch assembly 33 is connected to the reducer assembly 23, and the other end is connected to the transmission mechanism 5. The lifting clutch mechanism 3 achieves the engagement and disengagement of the handwheel drive assembly 2 and the transmission mechanism 5 according to the action of the handwheel drive assembly 2.

[0040] In some embodiments, the lifting crank 31 has an L-shaped structure, with its middle section hinged to the limiting and fixing frame 34; the top of the lifting crank 31 abuts against the lifting pressure plate 24, and the bottom is hinged to one end of the lifting linkage assembly 32. When the handwheel drive assembly 2 is pressed down, it drives the lifting crank 31 to rotate around its hinge axis, raising the bottom of the lifting crank 31 and further driving the lifting linkage assembly 32 to move.

[0041] In a preferred embodiment, the lifting linkage assembly 32 includes a front linkage 321, a first lifting rod 322, a second lifting rod 323, a clutch lever linkage 324, and a tension spring 325. One end of the front linkage 321 is hinged to the bottom of the lifting crank 31, and the other end is hinged together with one end of the first lifting rod 322 and the second lifting rod 323. The other end of the first lifting rod 322 is hinged to the limiting fixing frame 34, and the other end of the second lifting rod 323 is hinged to the top of the clutch lever linkage 324. The other end of the tension spring 325 is fixed to the bottom of the limiting fixing frame 34. The clutch lever linkage 324 is vertically arranged, and its other end is hinged to one side of the eccentric clutch assembly 33.

[0042] When the handwheel drive assembly 2 is pressed down, the lifting crank 31 rotates, and the bottom of the lifting crank 31 pushes upward, driving the front connecting rod 321 forward, which in turn drives the first lifting rod 322 and the second lifting rod 323 to move. Since the other end of the first lifting rod 322 is hinged to the limiting fixing frame 34, its movement is restricted. Therefore, the other end of the second lifting rod 323 is lifted upward, and the first lifting rod 322 is in an upward open state. The top of the clutch lever connecting rod 324 moves vertically upward under the drive of the second lifting rod 323, thereby causing one side of the eccentric clutch assembly 33 to deflect.

[0043] In this embodiment, the clutch eccentric assembly 33 includes a clutch lever 331, an eccentric wheel shaft 332, and a universal coupling 333. One end of the universal coupling 333 is connected to the reducer assembly 23, and the other end is connected to the transmission mechanism 5. The eccentric wheel shaft 332 is installed between the universal coupling 333 and the transmission mechanism 5. One end of the clutch lever 331 is radially fixed to one side of the eccentric wheel shaft 332, and the other end is hinged to the lifting linkage assembly 32.

[0044] In this embodiment, a turbine clutch assembly is provided in the transmission mechanism 5. The turbine clutch assembly includes a transmission turbine 51 and a clutch worm 52 disposed on one side of the transmission turbine 51. The clutch worm 52 meshes with the transmission turbine 51 and is fixedly connected to one end of the eccentric clutch assembly 33.

[0045] In a specific embodiment, the downward transmission rod 22 is rotatably connected to the reducer assembly 23, the output end of the reducer assembly 23 is rotatably connected to the universal coupling 333, the other end of the universal coupling 333 is rotatably connected to the transmission mechanism 5, the upper end of the transmission mechanism 5 is rotatably connected to the pneumatic assembly 4, and the lower end is rotatably connected to the valve plate of the butterfly valve.

[0046] Handwheel 21 is mounted on the downward transmission rod 22 via a handwheel connecting rod. The top of the handwheel connecting rod connects to handwheel 21 and also to power tools such as pistol drills, saving time and effort. The bottom of the handwheel connecting rod is fixed to the downward transmission rod 22, and a connecting rod pressure block is welded to the lower part of the downward transmission rod 22. Handwheel 21 and downward transmission rod 22 are designed as detachable parts to prevent accidental operation. The lower end of the handwheel connecting rod has a terminal groove design, and the upper end of the downward transmission rod 22 has a female groove design, allowing them to fit together perfectly. The external part of the downward transmission rod 22 can be wrapped with a sleeve to prevent it from shifting.

[0047] When it is necessary to switch the handwheel drive, the handwheel 21 is inserted into the downward transmission rod 22, and the downward transmission rod 22 is pressed down. The lifting pressure plate 24 is welded to the downward transmission rod 22 and will move downward together with the downward transmission rod 22. The outer side of the lifting pressure plate 24 pushes the lifting crank 31 downward to rotate clockwise around the lifting crank shaft. With continuous downward pressure, the lifting crank 31 eventually rotates 90 degrees, thereby driving the multiple links in the lifting linkage assembly 32 to move together.

[0048] The front link 321 will be pushed to the left and forward through the link shaft. The second lifting rod 323 and the first lifting rod 322 are connected to the front link 321 through the lifting rod shaft. However, since the other end of the first lifting rod 322 is connected to the first lifting rod 322 shaft and the other end of the first lifting rod 322 is a fixed end, the first lifting rod 322 can only move counterclockwise around the first lifting rod 322 shaft.

[0049] The second lifting lever 323 and the clutch lever connecting rod 324 are connected by the hinge shaft of the second lifting lever 323. The left-right movement of the clutch lever connecting rod 324 is restricted, and the forward-backward movement of its upper end is also restricted by the second lifting lever 323. Only the lower end can move slightly forward and backward with the clutch lever 331. Therefore, when the first lifting lever 322 moves counterclockwise, the second lifting lever 323 can only move clockwise around the lifting lever axis.

[0050] Under the constraint of the clutch lever connecting rod 324, the second lifting rod 323 drives the top of the clutch lever connecting rod 324 to rise upwards. At this time, the bottom of the clutch lever connecting rod 324 pulls the clutch lever 331 to rotate upwards, thereby driving the eccentric wheel shaft 332 to deflect and rotate. The eccentric wheel shaft 332 in the clutch eccentric assembly 33 is used to control the deflection of the universal coupling 333, so that the clutch worm gear 52 approaches and separates from the transmission worm 51, realizing the clutch switching of the worm clutch assembly inside the transmission mechanism 5.

[0051] When the handwheel 21 and the downward transmission rod 22 are pressed down, they sequentially drive the clutch lever 331 and the clutch eccentric assembly 33 to rotate upward. The universal coupling 333 will then move to the side, and the worm clutch assembly inside the transmission mechanism 5 will engage, that is, the transmission worm 51 and the clutch worm 52 will mesh, so that the reducer assembly 23 and the transmission mechanism 5 are connected. At this time, the transmission mechanism 5 can be rotated by the handwheel 5, that is, the downward transmission rod 22 is pressed down and the handwheel 21 is rotated, which drives the transmission mechanism 5 to rotate, thereby realizing the drive of the handwheel drive assembly 1.

[0052] When the handwheel 21 and the downward transmission rod 22 are lifted, the lifting pressure plate 24 will move upward accordingly, disengaging the push on the lifting linkage assembly 32. Then, the clutch lever linkage 324 will return to the lower limit state under the pull force of the tension spring 325, causing the clutch lever 331 to descend. The universal coupling 33 will move backward, thus disengaging the turbine clutch assembly inside the transmission mechanism 5. At this time, the handwheel 21 cannot rotate the transmission mechanism 5, and the pneumatic component 4 will drive it.

[0053] In this embodiment, a pressing self-locking mechanism 6 is installed between the handwheel drive assembly 2 and the lifting clutch mechanism 3.

[0054] like Figures 5 to 9As shown, in some embodiments, the pressing self-locking mechanism 6 includes a limiting fixing plate 61, a movable locking tongue 62, a movable limiting frame 63, a return spring 64, and a limiting latch 65. The limiting fixing plate 61 is vertically fixed to the housing of the reducer assembly 23. The movable locking tongue 62 is movably disposed within the limiting fixing plate 61 via a connecting rod 66, the top of which is fixedly connected to the pressing transmission rod 22. The movable limiting frame 63 is disposed at the bottom of the movable locking tongue 62. The top of the return spring 64 is connected to the limiting fixing plate, and the bottom is connected to the movable limiting frame 63. The limiting latches 65 are two sets symmetrically disposed on the outside of the movable limiting frame 63.

[0055] In a preferred embodiment, two locking tongue limiting blocks 611 are symmetrically arranged on the top of the limiting fixing plate 61, and a locking tongue groove 612 is formed between the two locking tongue limiting blocks 611.

[0056] Preferably, the movable locking tongue 62 includes two movable tongues 621, which are scissor-shaped connected in the middle and connected to the bottom of the connecting rod 66. A limit bracket locking hook 622 is provided at the bottom of the movable locking tongue 62.

[0057] Preferably, the movable limit frame 63 is located at the bottom of the movable locking tongue 62, and its middle part is vertically and movably mounted on the limit fixing plate 61. The movable limit frame 63 has a locking tongue connecting groove 631 that cooperates with the limit frame locking hook 622. The top end of the return spring 64 is connected to the limit fixing plate 61, and the bottom end is connected to the movable limit frame 63.

[0058] In a specific embodiment, the limiting tongues 65 are arranged in two sets symmetrically on the outside of the movable limiting frame 63, with their middle parts rotatably mounted on the limiting fixing plate 61 via a rotating shaft; the upper part of the inner side of the two opposing limiting tongues 65 is provided with an inner guide slope, the lower part is provided with a limiting groove, and the outer side is provided with an outer guide slope. In the unlocked state, the bottom of the limiting tongues 65 abuts against the bottom of the movable limiting frame 63 under the action of gravity.

[0059] Preferably, the upper part of the inner side surface of the movable tongue 621 is provided with a limiting slope and the lower part is provided with a locking slope. The limiting slope corresponds to the outer side of the locking tongue limiting block 611, and the limiting frame locking hook 622 of the movable tongue 621 is provided at the bottom of the locking slope.

[0060] In this embodiment, a movable groove for the limiting frame is vertically opened in the middle of the limiting fixing plate 61, and the movable limiting frame 63 is vertically and movably installed in the movable groove of the limiting frame. The reset spring 64 is arranged along the movable groove of the limiting frame on the back side of the limiting fixing plate 61.

[0061] In this embodiment, the movable limiting frame 63 has an inverted T-shaped structure, including a vertically arranged lifting rod and a horizontally installed limiting crossbar at the bottom of the lifting frame. A locking tongue connecting groove is formed on the lifting rod, and the length of the lifting rod is greater than the length of the inner guide slope of the limiting tongue 65. A spring connecting post is provided on the back side of the lifting rod, and the bottom of the return spring 64 is connected to the spring connecting post.

[0062] In a preferred embodiment, the center of gravity of the limiting latch 65 is located below the horizontal plane of the rotating shaft, which allows the limiting latch 65 to naturally close under the action of gravity.

[0063] In a specific embodiment, when transitioning from the unlocked state to the locked state, pressing down the transmission rod 22 causes the connecting rod 66 to move downwards, and the two movable tongues 621 of the movable locking tongue 62 move downwards simultaneously. At this time, the bottoms of the two movable tongues 621 are separated. When the bottoms of the two movable tongues 621 move to both sides of the movable limiting frame 63 and abut against the inner side of the limiting tongue 65, since the lower end of the limiting tongue 65 is restricted and closed by the bottom of the movable limiting frame 63, when pressing down further, the two movable tongues 621 continue to move downwards along the inner guide slope 652 of the limiting tongue 65. Under the action of the inner guide slope 652 on the inner side of the limiting tongue 65, the lower ends of the two movable tongues 621 gradually close to the lowest point. At the same time, with the lower end of the movable locking tongue 62 closed, the locking hooks 622 of the limiting frame at the bottom of the two movable tongues 621 close and bite the locking tongue connecting groove 631 of the movable limiting frame 63.

[0064] At this time, the downward transmission rod 22 is released, and the entire self-locking mechanism, under the action of the return spring 64, pulls the movable limit frame 63, the movable locking tongue 62 and the downward transmission rod 22 upward together. Since the top of the movable locking tongue 62 is in a large opening state, it forms a limit lock after rising to the outside of the two locking tongue limit blocks 611 of the limit fixing plate 61. During the upward process, the lower end of the movable limit frame 63 will gradually open and straighten the lower part of the limit latch 65, and make its bottom lock in the limit slot 653 of the limit latch 65. Thus, the locking function of the self-locking mechanism is completed.

[0065] When it is necessary to change from the locked state to the unlocked state, press down the transmission rod 22 again. The connecting rod 66 and the movable locking tongue 62 move downward as a whole. At this time, the bottom end of the movable locking tongue 62 and the top end of the limiting latch 65 are both in the closed state. As the movable locking tongue 62 continues to move downward, it will contact the limiting latch 65. At this time, the limiting latch 65 clamps the upper part of the movable limiting frame 63 under the action of gravity and locks the bottom end of the movable limiting frame 63. As the movable locking tongue 62 continues to move downward, the lower end of the movable locking tongue 62 is opened by the upper end of the limiting latch 65. The movable limiting frame 63 is pushed down by the movable locking tongue 62 and loses the engagement of the movable locking tongue 62. Under its own gravity, it naturally falls to the bottom. Then, as the movable locking tongue 62 continues to move downward, the lower end of the movable locking tongue 62 will continue to be opened due to the restriction of the limiting latch 65 until it is pressed down to the bottom. At this time, the movable locking tongue 62 will be in a posture with the upper end slightly smaller and the lower end slightly larger.

[0066] At this point, after releasing the downward transmission rod 22, the entire self-locking mechanism moves upward under the action of the return spring 64. Since the movable locking tongue 62 will be positioned with its upper end slightly smaller than its lower end, it will enter the locking tongue groove 612 between the two locking tongue limit blocks 611. As the movable locking tongue 62 continues to move upward, the limit latch 65 also escapes the constraints of the movable locking tongue 62 and the movable limit bracket 63. Due to the weight-reducing hole design at the upper end of the limit latch 65, its center of gravity is located below the horizontal plane of the rotating shaft, making it heavier at the bottom and lighter at the top. Therefore, without the constraints of the movable locking tongue 62 and the movable limit bracket 64, the lower end of the limit latch 65 will naturally retract to the position of the movable limit bracket 64 due to gravity. At this point, the entire self-locking mechanism is unlocked.

[0067] The specific embodiments described in this invention are merely illustrative of the invention and are not intended to limit it. Those skilled in the art can make modifications to these embodiments without contributing any inventive step after reading this specification, but such modifications are protected by patent law as long as they fall within the scope of the claims of this invention.

Claims

1. A hand-operated butterfly valve device for regulating the flow of water, characterized in that It includes a butterfly valve body (1), a handwheel drive assembly (2), a lifting clutch mechanism (3), a pneumatic assembly (4), and a transmission mechanism (5). The pneumatic assembly is driven to the butterfly valve body through the transmission mechanism, and the handwheel drive assembly is driven to the transmission mechanism through the lifting clutch mechanism. The handwheel drive assembly includes a handwheel (21), a downward transmission rod (22), and a reducer assembly (23). The downward transmission rod is installed at the bottom of the handwheel and is vertically movably installed on the reducer assembly and is connected to the reducer assembly in a transmission connection. A lifting pressure plate (24) is fixedly installed on one side of the handwheel. The lifting clutch mechanism includes a lifting crank (31), a lifting connecting rod assembly (32), and an eccentric clutch assembly (33) that are hinged in sequence. A limiting fixing frame (34) is provided on the outside of the lifting connecting rod assembly and the eccentric clutch assembly. The limiting fixing frame is fixedly installed on the housing between the transmission mechanism and the reducer assembly. One end of the eccentric clutch assembly is connected to the reducer assembly, and the other end is connected to the transmission mechanism.

2. The pneumatic butterfly valve apparatus for regulating intake water according to claim 1, wherein, The lifting crank has an L-shaped structure, with its middle part hinged to the limiting and fixing frame; the top of the lifting crank abuts against the lifting pressure plate, and the bottom is hinged to one end of the lifting connecting rod assembly.

3. The pneumatic butterfly valve apparatus for regulating intake water according to claim 1, wherein, The lifting linkage assembly includes a front linkage (321), a first lifting rod (322), a second lifting rod (323), a clutch lever linkage (324), and a tension spring (325). One end of the front linkage is hinged to the end of the lifting crank, and the other end is hinged to one end of the first lifting rod, the second lifting rod, and the tension spring. The other end of the first lifting rod is hinged to the limiting fixing frame, and the other end of the second lifting rod is hinged to the top of the clutch lever linkage. The other end of the tension spring is fixed to the bottom of the limiting fixing frame. The clutch lever linkage is vertically arranged, and its other end is hinged to one side of the eccentric clutch assembly.

4. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 1, characterized in that, The clutch eccentric assembly includes a clutch lever (331), an eccentric wheel shaft (332), and a universal coupling (333). One end of the universal coupling is connected to the reducer assembly, and the other end is connected to the transmission mechanism. The eccentric wheel shaft is installed between the universal coupling and the transmission mechanism. One end of the clutch lever is radially fixed to one side of the eccentric wheel shaft, and the other end is hinged to the lifting linkage assembly.

5. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 1, characterized in that, The transmission mechanism is equipped with a turbine clutch assembly, which includes a transmission turbine (51) and a clutch worm (52) disposed on one side of the transmission turbine. The clutch worm is fixedly connected to one end of the eccentric clutch assembly.

6. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 1, characterized in that, A pressing self-locking mechanism (6) is installed between the handwheel drive assembly and the lifting clutch mechanism.

7. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 6, characterized in that, The pressing self-locking mechanism includes a limiting fixing plate (61), a movable locking tongue (62), a movable limiting frame (63), a return spring (64), and a limiting latch (65). The limiting fixing plate is vertically fixed on the housing of the reducer assembly. The movable locking tongue is movably disposed inside the limiting fixing plate via a connecting rod (66). The top of the connecting rod is fixedly connected to the pressing transmission rod. The movable limiting frame is disposed at the bottom of the movable locking tongue. The top of the return spring is connected to the limiting fixing plate, and the bottom is connected to the movable limiting frame. The limiting latch consists of two sets symmetrically disposed on the outside of the movable limiting frame.

8. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 7, characterized in that, Two locking tongue limiting blocks (611) are symmetrically arranged on the top of the limiting and fixing plate, and a locking tongue groove (612) is formed between the two locking tongue limiting blocks.

9. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 7, characterized in that, The movable locking tongue includes two movable tongues (621), which are connected in a scissor-like manner in the middle and connected to the bottom of the connecting rod. A limit bracket locking hook (622) is provided at the bottom of the movable locking tongue.

10. The hand-operated pneumatic butterfly valve device for adjusting water inlet according to claim 7, characterized in that, The movable limit bracket is located at the bottom of the movable lock tongue, and its middle part is vertically and movably mounted on the limit fixing plate. The movable limit bracket has a lock tongue connecting groove (631) that cooperates with the lock hook of the limit bracket. The top end of the return spring is connected to the limit fixing plate, and the bottom end is connected to the movable limit bracket.

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