Safe self-locking flat gate valve

Abstract

The safety self-locking type flat gate valve comprises a valve seat mechanism, a protection mechanism, a limiting groove and a valve plate, the valve seat mechanism is used for controlling circulation work of a medium in the valve, the protection mechanism is arranged on one side of the valve seat mechanism, and the protection mechanism is used for protecting work of the valve plate. The interior of the protection mechanism communicates with the interior of the valve seat mechanism, the other side of the valve seat mechanism and the other end of the protection mechanism are each provided with a butt joint mechanism, and sealing adjustment is conducted by rotating an adjusting bolt outside the valve body. One end of the adjusting bolt moves towards the interior of the valve body and abuts against the adjusting block, so that the adjusting block moves towards the valve plate in the valve body, a gap between the valve plate and the sealing surface of the adjusting block is eliminated, and the sealing performance is recovered; the sealing adjustment of the valve can be completed only by screwing an external adjusting bolt without disassembling the valve, so that the convenience of valve maintenance is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a safety self-locking flat gate valve. Background Art

[0002] Flat gate valves are widely used in multiple industries such as petrochemical, natural gas, electric power, and urban water supply and drainage. Especially in environments with high temperature, high pressure, and corrosive media, they can ensure the safety and stability of the production process. After retrieval, a patent with the Chinese patent publication number CN112610709A discloses a flat gate valve. Although this flat gate valve has the dual functions of shut-off and check, the sealing surface is not easily damaged, and the valve has good sealing performance and a long service life. However, as the valve is used for a longer time, the friction between the valve seat and the valve plate will cause the sealing performance between them to decline. Although the sealing ring of the valve seat can be replaced, the valve needs to be disassembled from the pipeline, and then the valve body needs to be disassembled to replace the internal valve seat, resulting in troublesome maintenance and replacement. Moreover, the pipeline needs to be shut down, reducing the convenience of valve use. After retrieval, a patent with the Chinese patent publication number CN107270020A discloses a flat gate valve. Although this valve strengthens the axial limit effect of the external pipeline through a limit strengthening auxiliary mechanism, in addition, the main function of the limit strengthening auxiliary mechanism is to seal the external pipeline and the valve body. The axial limit mechanism strengthens the sealing performance while preventing the external pipeline from detaching in the axial direction. However, since the valve plate of the valve is prone to water hammer effect when closing, when the water hammer pressure impacts on the valve plate, the instantaneous high pressure generated by the water hammer will impact the valve plate, which may cause the valve plate to deform, crack, or be damaged. Moreover, the sealing surface between the valve plate and the valve seat may be damaged due to water hammer impact, resulting in a decline in sealing performance and leakage. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a safety self-locking flat gate valve, which solves the problems that the existing valves are troublesome to use and maintain and are easily damaged due to water hammer effect mentioned in the background art.

[0004] To achieve the above object, the present invention is realized by the following technical solutions: A safety self-locking flat gate valve includes a valve seat mechanism, a protection mechanism, a limit groove and a valve plate. The valve seat mechanism is used to control the internal medium flow of the valve. A protection mechanism is provided on one side of the valve seat mechanism, and the protection mechanism is used to protect the valve plate. The inside of the protection mechanism is communicated with the inside of the valve seat mechanism. Docking mechanisms are provided on the other side of the valve seat mechanism and at the other end of the protection mechanism respectively. The docking structure is used for the docking of the valve with an external pipeline. A support frame is provided on the top of the valve seat mechanism. The bottom of the support frame is connected to one end of the top of the valve seat mechanism by bolts. A limit groove is provided inside the support frame. Hole grooves are provided at both ends of the limit groove. The hole grooves at both ends of the limit groove are connected to the top of the valve seat mechanism by bolts. A valve plate is provided inside the limit groove. One end of the bottom of the valve plate penetrates into the valve seat mechanism. Both sides of one end of the top of the valve plate are in sliding contact with the inside of the limit groove. One end of the top of the valve plate is welded to the valve rod. The outer wall of the valve rod is threadedly connected to the inside of the turntable. The bottom of the turntable is rotatably connected to the top of the connecting seat. The bottom of the connecting seat is connected to the top of the support frame by bolts. A self-locking mechanism is provided on one side of the support frame, and the self-locking mechanism is used for the self-locking of the turntable.

[0005] Preferably, the valve seat mechanism includes a valve body. There are two valve bodies, and the two valve bodies are welded to each other. A valve plate is provided between the two valve bodies. The bottom of the valve plate is arc-shaped, and the edge of the bottom of the valve plate is a smooth chamfer. The surface of the valve plate is in close fit and sliding contact with the inner surface of the valve body. Circular light-transmitting holes are provided inside the two valve bodies. The inside of the valve body is hollow, and an adjusting block is provided inside the hollow structure of the valve body. Adjusting bolts are provided at the four ends of the adjusting block, and the adjusting bolts are threadedly connected to the valve seat body. The bottom of the valve plate is arc-shaped, and the edge is a smooth chamfer. This design enables the valve plate to be closely attached to the inner surface of the valve body, reducing the risk of medium leakage; at the same time, the sliding contact between the valve plate and the valve body also ensures that the valve can be smoothly sealed during the opening and closing process; the setting of the adjusting block further enhances the sealing performance; by adjusting the adjusting bolts, the position of the adjusting block can be finely adjusted to make the sealing surface between it and the valve plate more closely attached, thereby effectively compensating for the wear of the sealing surface caused by long-term use and maintaining the sealing performance of the valve.

[0006] Preferably, a circular through-hole is provided inside the adjusting block for the medium to flow through. An annular protruding structure is provided on one side of the adjusting block, and the surface of the annular protruding structure on one side of the adjusting block is in close contact with the surface of the valve plate. The shape of the adjusting block matches the cross-sectional shape of the inner cavity of the valve body, and the outer wall of the adjusting block is in sliding contact with the inner wall of the inner cavity of the valve body. There is a gap between one side surface of the adjusting block and the inner wall of the inner cavity of the valve body, and the first sealing ring and the second sealing ring are embedded on the surface of the adjusting block. The outer wall of the adjusting block is in sliding contact with the inner wall of the inner cavity of the valve body, and at the same time, there is a certain gap between one side surface of the adjusting block and the inner wall of the inner cavity of the valve body; this ensures the flexible movement of the adjusting block inside the valve body, and the second sealing ring ensures a high sealing performance between the adjusting block and the valve body.

[0007] Preferably, the protection mechanism includes a water inlet pipe. One end of the water inlet pipe is welded to the valve body, the bottom of the water inlet pipe is welded to the top of the buffer chamber, and one end of the top of the buffer chamber is communicated with the inside of the water inlet pipe. A piston is arranged inside the buffer chamber, a rubber sealing ring is sleeved outside the piston, and the piston is in sliding contact with the inner wall of the buffer chamber. A first spring is arranged at the bottom of the buffer chamber. When the water hammer effect occurs, the pressure of the water flow will push the piston to compress the first spring at the bottom of the buffer chamber; the elastic potential energy of the spring is used to absorb the impact energy, thereby reducing the impact of the water hammer on the internal components of the valve (such as the valve plate and the valve seat), protecting the valve from damage. By absorbing the water hammer impact force through the buffer mechanism, the risk of deformation or damage of the valve plate, valve seat and other key components due to instantaneous high pressure can be significantly reduced. This not only extends the service life of the valve, but also reduces the maintenance and replacement costs caused by component damage.

[0008] Preferably, the bottom of the buffer chamber is threadedly connected to a threaded column. A knob is welded to the bottom of the threaded column, and a lifting block is welded to one end of the top of the threaded column. The outer wall of the lifting block is in sliding contact with the inner wall of the buffer chamber. The design of the threaded column and the knob at the bottom of the buffer chamber allows the user to adjust the compression degree of the first spring according to the actual working conditions; by adjusting the position of the threaded column through the knob, the pre-tightening force of the spring can be changed, so as to adapt to different fluid pressures and water hammer intensities. This adjustability enables the valve to better cope with complex working conditions and enhances its applicability and flexibility.

[0009] Preferably, the docking mechanism includes two connectors. The two connectors are respectively welded to the valve body and the water inlet pipe. Two set screws are symmetrically distributed up and down outside the connector. The set screws are threadedly connected to the threaded outer wall of the connector. An adjusting head is arranged inside the connector. The outer wall of the adjusting head is designed with a plurality of annular protruding structures and is embedded with a third sealing ring, which enhances the sealing performance between the adjusting head and the connector; at the same time, the adjusting head and the connector are rotationally connected through an annular groove and a clamping groove, so that the valve can be adjusted at an angle according to needs during installation.

[0010] Preferably, a plurality of annular convex structures are distributed on the outer wall of the adjusting head at equal intervals, and a third sealing ring is embedded on the surface of the annular convex structure. The connecting head is provided with annular grooves distributed at equal intervals in a straight line. The inside of the connecting head is rotationally connected to the outer wall of the adjusting head through the annular grooves. One end of the adjusting head is provided with clamping grooves at equal intervals in a ring shape, and one end of the set screw penetrates into the clamping grooves at the end of the adjusting head. The end of the adjusting head is designed with annularly equally spaced clamping grooves, and one end of the set screw can penetrate into the clamping grooves. By tightening the set screw, the adjusting head can be fixed in the connecting head, ensuring the accurate and stable connection angle between the valve and the pipeline. The set screw provides a reliable fixing force through threaded connection, ensuring that the adjusting head will not loosen due to external force or vibration after installation.

[0011] Preferably, the self-locking mechanism includes sliders. There are two sliders, and one side of the two sliders is welded to the support frame. A second spring is arranged between the two sliders. The second spring is sleeved outside the sliding rod. A limiting block is welded to the outer wall of the sliding rod. The bottom of the limiting block contacts the top of the spring. The sliding rod is in sliding contact with the inside of the two sliders. One end of the bottom of the sliding rod is welded with a pull ring. The design of the self-locking mechanism can effectively prevent the accidental opening of the valve caused by external force or misoperation. After the valve is closed, the sliding rod locks the turntable under the action of the spring, making it unable to rotate in the reverse direction, thus ensuring that the valve remains closed and avoiding the risk of medium leakage. The sliding rod can be manually pulled downward through the pull ring to disengage it from the engagement with the turntable, thus releasing the self-locking state. This design not only ensures the safety of the valve during normal operation but also allows the valve to be manually opened when needed, improving the flexibility of operation.

[0012] Preferably, one end of the top of the sliding rod is engaged with the bottom of the turntable. The bottom of the turntable is annularly distributed with tooth grooves, and one side of the tooth surface of the tooth groove is right-angled, and the other side is sloped. When the top of the sliding rod contacts the right-angled surface of the tooth groove, due to the blocking effect of the right-angled surface, the sliding rod cannot continue to move upward, thus locking the turntable in the current position and preventing it from rotating in the reverse direction. When the turntable rotates normally, the top of the sliding rod will slide along the slope and be compressed downward, thus allowing the turntable to rotate smoothly. This design enables the valve to close smoothly during normal operation and automatically lock after closing.

[0013] The present invention provides a safety self-locking flat gate valve. It has the following beneficial effects: (1). This safety self-locking flat gate valve. During operation, the valve stem drives the valve plate to slide up and down between the two valve bodies to achieve the opening and closing of the valve. The seal between the valve body and the valve plate is achieved through an adjusting block. As the valve is used for a longer time, gaps may appear on the sealing surfaces of the valve plate and the adjusting block, resulting in a decline in sealing performance. At this time, the sealing performance can be adjusted by rotating the adjusting bolt outside the valve body. One end of the adjusting bolt moves towards the inside of the valve body and presses against the adjusting block, prompting the adjusting block to move towards the valve plate inside the valve body, thereby eliminating the gap between the sealing surfaces of the valve plate and the adjusting block and restoring the sealing performance. The sealing adjustment of this valve does not require the valve to be disassembled. It only needs to tighten the external adjusting bolt to complete, significantly improving the convenience of valve maintenance.

[0014] (2). This safety self-locking flat gate valve. When the valve is closed, it drives the valve plate to achieve sealing by rotating the turntable. When a water hammer effect occurs in the pipeline, the high-pressure impact generated by the water flow acts on the inside of the valve, and the pressure will act on the piston in the buffer chamber inside the valve, pushing the piston to compress the first spring in the buffer chamber. The first spring absorbs and weakens the water hammer pressure through elastic deformation, thereby effectively protecting the valve and reducing the impact of the water hammer on the valve. When the water pressure in the pipeline returns to normal, the first spring releases its elastic potential energy and pushes the piston back to its original position. In addition, the valve is equipped with an adjustable protection mechanism. By rotating the knob, the knob drives the threaded column to rotate. The threaded column cooperates with the lifting block through its external threads, causing the lifting block to move axially upward, thereby compressing the first spring. In this way, the pre-tightening force of the first spring can be adjusted, so as to adjust the buffering capacity of the buffer mechanism according to the actual working conditions and enhance the adaptability and adjustability of the protection mechanism.

[0015] (3). This safety self-locking flat gate valve. When installing the valve, it is fixedly connected to the external pipeline through the threads at one end of the two adjusting heads. When the angle of the valve needs to be adjusted after the two adjusting heads are installed and fixed, by loosening the set screw, one end of the set screw will move out of the internal slot of one end of the adjusting head, and then the valve body between the two adjusting heads can be adjusted in angle. When the adjustment reaches the appropriate angle, by tightening the set screw, one end of the set screw can be inserted into the internal slot, and then the angle of the valve body can be fixed, thereby improving the adjustability of the valve during installation.

[0016] (4) For this safety self-locking flat gate valve, when the turntable rotates to close the valve, under the action of the second spring, the second spring can push the slide rod upward, so that one end of the top of the slide rod can engage with the tooth groove at the bottom of the turntable. When the turntable rotates, the top of the slide rod will contact the slope of the tooth of the bottom of the turntable and then retract downward, enabling the turntable to rotate normally to close the valve. When the turntable is rotated in the reverse direction by an external force, under the push of the second spring, one end of the top of the slide rod engages with the right-angle surface of the internal tooth at the bottom of the turntable, thereby enabling the turntable to be automatically locked, preventing the turntable from rotating due to external force and causing the valve to be accidentally opened. By pulling the snap ring at the bottom of the slide rod, the slide rod can move downward, enabling the slide rod to disengage from the engagement of the turntable, and enabling the turntable to open the valve normally, greatly improving the safety of the valve during use.

[0017] Thus, the problems that existing valves are troublesome to use and maintain and are easily damaged due to the water hammer effect are solved. Brief Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a front view schematic diagram of the present invention; Figure 3 is a schematic diagram of the connection between the turntable and the self-locking mechanism of the present invention; Figure 4 is of the present invention Figure 3 the enlarged structural schematic diagram at A in; Figure 5 is a cross-sectional structural schematic diagram of the water inlet pipe of the present invention; Figure 6 is a schematic diagram of the connection between the valve plate and the valve body of the present invention; Figure 7 is a schematic diagram of the connection between the valve body and the adjusting block of the present invention; Figure 8 is a structural schematic diagram of the adjusting block of the present invention; Figure 9 is a cross-sectional structural schematic diagram of the valve body of the present invention.

[0019] In the figure, 1 is the valve seat mechanism; 101 is the valve body; 102 is the adjusting bolt; 103 is the adjusting block; 104 is the first sealing ring; 105 is the second sealing ring; 2 is the protection mechanism; 201 is the water inlet pipe; 202 is the buffer bin; 203 is the piston; 204 is the first spring; 205 is the lifting block; 206 is the knob; 207 is the threaded column; 3 is the docking mechanism; 301 is the connector; 302 is the set screw; 303 is the adjusting head; 304 is the third sealing ring; 305 is the card slot; 4 is the support frame; 5 is the limit slot; 6 is the valve plate; 7 is the valve stem; 8 is the turntable; 9 is the self-locking mechanism; 901 is the slider; 902 is the slide bar; 903 is the limit block; 904 is the second spring; 905 is the pull ring; 10 is the connecting seat. Detailed implementation mode

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Example 1: Please refer to Figures 1-9, an embodiment of the present invention provides a technical solution: a safety self-locking flat gate valve, which includes a valve seat mechanism 1, a protection mechanism 2, a limit groove 5, and a valve plate 6. The valve seat mechanism 1 is used to control the flow of the medium inside the valve. A protection mechanism 2 is arranged on one side of the valve seat mechanism 1. The protection mechanism 2 is used to protect the valve plate 6 during operation. The inside of the protection mechanism 2 is communicated with the inside of the valve seat mechanism 1. Docking mechanisms 3 are arranged on the other side of the valve seat mechanism 1 and the other end of the protection mechanism 2 respectively. The docking structure is used for the docking of the valve with the external pipeline. A support frame 4 is arranged on the top of the valve seat mechanism 1. The bottom of the support frame 4 is connected to one end of the top of the valve seat mechanism 1 by bolts. A limit groove 5 is arranged inside the support frame 4. Through holes are arranged at both ends of the limit groove 5. The through holes at both ends of the limit groove 5 are connected to the top of the valve seat mechanism 1 by bolts. A valve plate 6 is arranged inside the limit groove 5. One end of the bottom of the valve plate 6 penetrates into the valve seat mechanism 1. Both sides of one end of the top of the valve plate 6 are in sliding contact with the inside of the limit groove 5. One end of the top of the valve plate 6 is welded to the valve stem 7. The outer wall of the valve stem 7 is threadedly connected to the inside of the turntable 8. The bottom of the turntable 8 is rotatably connected to the top of the connecting seat 10. The bottom of the connecting seat 10 is connected to the top of the support frame 4 by bolts. A self-locking mechanism 9 is arranged on one side of the support frame 4. The self-locking mechanism 9 is used for the self-locking of the turntable 8; The valve seat mechanism 1 includes a valve body 101. There are two valve bodies 101, and the two valve bodies 101 are welded to each other. A valve plate 6 is arranged between the two valve bodies 101. The bottom of the valve plate 6 is in an arc-shaped structure, and the bottom edge of the valve plate 6 is in a smooth chamfer shape. The surface of the valve plate 6 is in close fit and sliding contact with the inner surface of the valve body 101. Circular light passing holes are arranged inside the two valve bodies 101. The inside of the valve body 101 is in a hollow structure, and an adjusting block 103 is arranged inside the hollow structure of the valve body 101. Adjusting bolts 102 are arranged at the four ends of the adjusting block 103. The adjusting bolts 102 are threadedly connected to the valve seat body;A circular through-hole is provided inside the adjusting block 103 for the flow of the medium. An annular protruding structure is provided on one side of the adjusting block 103, and the surface of the annular protruding structure on one side of the adjusting block 103 is in close contact with the surface of the valve plate 6. The shape of the adjusting block 103 coincides with the cross-sectional shape of the inner cavity of the valve body 101, and the outer wall of the adjusting block 103 is in sliding contact with the inner wall of the inner cavity of the valve body 101. There is a gap between one side surface of the adjusting block 103 and the inner wall of the inner cavity of the valve body 101, and the first sealing ring 104 and the second sealing ring 105 are embedded on the surface of the adjusting block 103. During the use of this valve, the valve stem 7 drives the valve plate 6 to slide up and down between the two valve bodies 101, so as to switch the opening and closing of the valve. The valve body 101 and the valve plate 6 are sealed through the adjusting block 103. When the sealing surface between the valve plate 6 and the adjusting block 103 has a gap and the sealing performance decreases as the valve is used for a longer time, by rotating the adjusting bolt 102 outside the valve body 101, one end of the adjusting bolt 102 will move towards the inner side of the valve body 101, and then one end of the adjusting bolt 102 will abut against the adjusting block 103, enabling the adjusting block 103 to move inside the valve body 101, and further enabling one end of the adjusting block 103 to move towards the valve plate 6, so as to eliminate the gap of the sealing surface between the adjusting block 103 and the valve plate 6, and further maintain the sealing performance of the valve plate 6. When adjusting the sealing performance between the valve plate 6 and the adjusting block 103, this valve does not need to be disassembled, and only needs to tighten the adjusting bolt 102 outside the valve, which greatly improves the convenience of valve maintenance.

[0022] Embodiment 2: Please refer to Figures 1-5, an embodiment of the present invention provides a technical solution: a safety self-locking flat gate valve. The protection mechanism 2 includes a water inlet pipe 201. One end of the water inlet pipe 201 is welded to the valve body 101. The bottom of the water inlet pipe 201 is welded to the top of the buffer chamber 202, and one end of the top of the buffer chamber 202 is communicated with the inside of the water inlet pipe 201. A piston 203 is arranged inside the buffer chamber. A rubber sealing ring is sleeved outside the piston 203. The piston 203 is in sliding contact with the inner wall of the buffer chamber 202. A first spring 204 is arranged at the bottom of the buffer chamber 202. The bottom of the buffer chamber 202 is threadedly connected with a threaded column 207. A knob 206 is welded to the bottom of the threaded column 207. One end of the top of the threaded column 207 is welded with a lifting block 205. The outer wall of the lifting block 205 is in sliding contact with the inner wall of the buffer chamber 202. The valve plate 6 is closed by rotating the turntable 8. When a water hammer effect occurs inside the pipeline and the water flow pressure impacts the inside of the valve, the pressure will push the piston 203 inside the buffer chamber 202 of the valve, and then push the piston 203 to compress the first spring 204 inside the buffer chamber 202. The first spring 204 can weaken the pressure generated by the water hammer, which is beneficial to protecting the valve and reducing the influence of the water hammer pressure on the valve. When the water pressure inside the valve returns to normal, the spring will push the piston 203 to reset. By rotating the knob 206, the knob 206 can drive the threaded column 207 to rotate. The threaded column 207 moves upward through the external thread, and then pushes the lifting block 205 to compress the first spring 204, thereby adjusting the pressure of the first spring 204, enabling the pressure of the first spring 204 to be adjusted, and improving the adjustability of the protection mechanism 2.

[0023] Example 3: Please refer to Figures 1-5, an embodiment of the present invention provides a technical solution: a safety self-locking flat gate valve. The docking mechanism 3 includes a connector 301. There are two connectors 301, and the two connectors 301 are respectively welded to the valve body 101 and the water inlet pipe 201. Two set screws 302 are symmetrically distributed up and down outside the connector 301, and the set screws 302 are threadedly connected to the threaded outer wall of the connector 301. An adjusting head 303 is arranged inside the connector 301; a plurality of annular protruding structures are distributed at equal intervals on the outer wall of the adjusting head 303, and a third sealing ring 304 is embedded on the surface of the annular protruding structure. Annular grooves are distributed at equal intervals in a straight line on the connector 301, and the inside of the connector 301 is rotationally connected to the outer wall of the adjusting head 303 through the annular grooves. A clamping groove 305 is formed at one end of the adjusting head 303 in an annular and equally spaced manner, and one end of the set screw 302 penetrates into the clamping groove 305 at the end of the adjusting head 303. When installing this valve, it is fixedly connected to the external pipeline through the threads at one end of the two adjusting heads 303. When the angle of the valve needs to be adjusted after the two adjusting heads 303 are installed and fixed, by loosening the set screw 302, one end of the set screw 302 will move out of the clamping groove 305 at one end of the adjusting head 303, so that the valve body 101 between the two adjusting heads 303 can be angle-adjusted. When adjusted to the appropriate angle, by tightening the set screw 302, one end of the set screw 302 can be inserted into the clamping groove 305, so that the angle of the valve body 101 can be fixed, thereby improving the adjustability of the valve during installation.

[0024] Example 4: Please refer to Figures 1-4, an embodiment of the present invention provides a technical solution: a safety self-locking flat gate valve. The self-locking mechanism 9 includes sliders 901. There are two sliders 901, and one side of the two sliders 901 is welded to the support frame 4. A second spring 904 is arranged between the two sliders 901. The second spring 904 is sleeved outside the slide rod 902. A limit block 903 is welded to the outer wall of the slide rod 902. The bottom of the limit block 903 contacts the top of the spring. The slide rod 902 is in sliding contact with the inside of the two sliders 901. One end of the bottom of the slide rod 902 is welded with a pull ring 905; one end of the top of the slide rod 902 is engaged with the bottom of the turntable 8. The bottom of the turntable 8 is annularly distributed with tooth grooves, and one side of the tooth surface of the tooth groove is right-angled and the other side is sloped. When the turntable 8 rotates to close the valve, under the action of the second spring 904, the second spring 904 can push the slide rod 902 to move upward, so that one end of the top of the slide rod 902 can be engaged with the tooth groove at the bottom of the turntable 8. When the turntable 8 rotates, the top of the slide rod 902 will contact the sloped surface of the tooth of the bottom of the turntable 8, and then retract downward, so that the turntable 8 can rotate normally to close the valve. When the turntable 8 is rotated in the reverse direction by an external force, under the push of the second spring 904, one end of the top of the slide rod 902 is engaged with the right-angled surface of the internal teeth at the bottom of the turntable 8, so that the turntable 8 can be automatically locked, avoiding the turntable 8 from rotating due to an external force and causing the valve to be accidentally opened. By pulling the snap ring at the bottom of the slide rod 902, the slide rod 902 can move downward, so that the slide rod 902 can be disengaged from the engagement of the turntable 8, and the turntable 8 can normally open the valve, greatly improving the safety of the valve during use.

[0025] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0026] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety self-locking flat gate valve, characterized in that: The valve seat mechanism (1) comprises a valve seat mechanism (1), a protection mechanism (2), a limiting groove (5) and a valve plate (6), wherein the valve seat mechanism (1) is used to control the flow of a medium inside the valve, a protection mechanism (2) is arranged on one side of the valve seat mechanism (1), the protection mechanism (2) is used to protect the valve plate (6), the interior of the protection mechanism (2) is communicated with the interior of the valve seat mechanism (1), the other side of the valve seat mechanism (1) and the other end of the protection mechanism (2) are both provided with a docking mechanism (3), the docking structure is used for docking the valve with an external pipeline, a support frame (4) is arranged on the top of the valve seat mechanism (1), the bottom of the support frame (4) is connected to one end of the top of the valve seat mechanism (1) by bolts, the limiting groove (5) is arranged inside the support frame (4), the The limiting groove (5) is provided with hole grooves at both ends, and the hole grooves at both ends of the limiting groove (5) are connected to the top of the valve seat mechanism (1) by bolts. A valve plate (6) is provided inside the limiting groove (5), and one end of the bottom of the valve plate (6) is inserted into the inside of the valve seat mechanism (1). Both sides of the top end of the valve plate (6) are in sliding contact with the inside of the limiting groove (5). One end of the top of the valve plate (6) is welded to the valve stem (7), and the outer wall of the valve stem (7) is threadedly connected to the inside of the turntable (8). The bottom of the turntable (8) is rotatably connected to the top of the connecting seat (10), and the bottom of the connecting seat (10) is connected to the top of the support frame (4) by bolts. A self-locking mechanism (9) is provided on one side of the support frame (4), and the self-locking mechanism (9) is used for the self-locking operation of the turntable (8).

2. A safety self-locking flat gate valve according to claim 1, characterized in that: The valve seat mechanism (1) comprises a valve body (101), wherein two valve bodies (101) are provided and the two valve bodies (101) are welded to each other, a valve plate (6) is provided between the two valve bodies (101), the bottom of the valve plate (6) is in an arc-shaped structure, and the bottom edge of the valve plate (6) is in a smooth chamfered shape, the surface of the valve plate (6) is tightly fitted with and in sliding contact with the inner surface of the valve body (101), circular light holes are provided inside the two valve bodies (101), the inside of the valve body (101) is in a hollow structure, and an adjustment block (103) is provided inside the hollow structure of the valve body (101), and the four ends of the adjustment block (103) are provided with adjustment bolts (102), and the adjustment bolts (102) are threadedly connected to the valve seat body.

3. A safety self-locking flat gate valve according to claim 2, characterized in that: The regulating block (103) is provided with a circular through hole inside for medium circulation, and an annular protruding structure is provided on one side of the regulating block (103), and the surface of the annular protruding structure on one side of the regulating block (103) is tightly fitted with the surface of the valve plate (6), the shape of the regulating block (103) is consistent with the cross-sectional shape of the internal cavity of the valve body (101), and the outer wall of the regulating block (103) is in sliding contact with the inner wall of the internal cavity of the valve body (101), there is a gap between the surface of one side of the regulating block (103) and the inner wall of the internal cavity of the valve body (101), and a first sealing ring (104) and a second sealing ring (105) are embedded on the surface of the regulating block (103).

4. A safety self-locking flat gate valve according to claim 1, characterized in that: The protection mechanism (2) comprises a water inlet pipe (201), one end of the water inlet pipe (201) is welded to the valve body (101), the bottom of the water inlet pipe (201) is welded to the top of the buffer bin (202), and one end of the top of the buffer bin (202) is connected to the inside of the water inlet pipe (201), a piston (203) is arranged inside the buffer bin (202), a rubber sealing ring is sleeved on the outside of the piston (203), the piston (203) is in sliding contact with the inner wall of the buffer bin (202), and a first spring (204) is arranged at the bottom of the buffer bin (202).

5. A safety self-locking flat gate valve according to claim 4, characterized in that: The bottom of the buffer bin (202) is threadedly connected to the threaded column (207), a knob (206) is welded to the bottom of the threaded column (207), a lifting block (205) is welded to one end of the top of the threaded column (207), and the outer wall of the lifting block (205) is in sliding contact with the inner wall of the buffer bin (202).

6. According to claim 1, a safety self-locking flat gate valve is characterized in that: The docking mechanism (3) comprises a connecting head (301), two connecting heads (301) are provided, the two connecting heads (301) are respectively welded to the valve body (101) and the water inlet pipe (201), two fixing screws (302) are symmetrically distributed on the outside of the connecting head (301) in an upper and lower manner, the fixing screws (302) are threadedly connected to the threaded outer wall of the connecting head (301), and an adjusting head (303) is provided inside the connecting head (301).

7. A safety self-locking flat gate valve according to claim 6, characterized in that: The outer wall of the regulating head (303) is provided with a plurality of annular protrusion structures at equal intervals, and a third sealing ring (304) is embedded on the surface of the annular protrusion structure. The connecting head (301) is provided with annular grooves at equal intervals in a straight line. The interior of the connecting head (301) is rotatably connected to the outer wall of the regulating head (303) via the annular grooves. One end of the regulating head (303) is provided with a groove (305) at equal intervals in annular shapes, and one end of the set screw (302) is inserted into the interior of the groove (305) at the end of the regulating head (303).

8. According to claim 1, a safety self-locking flat gate valve is characterized in that: The self-locking mechanism (9) comprises a slider (901), two sliders (901) are provided, and one side of the two sliders (901) is welded to the support frame (4), a second spring (904) is provided between the two sliders (901), the second spring (904) is sleeved on the outside of the slide bar (902), a limit block (903) is welded to the outer wall of the slide bar (902), the bottom of the limit block (903) is in contact with the top of the spring, the slide bar (902) is in sliding contact with the inside of the two sliders (901), and a pull ring (905) is welded to one end of the bottom of the slide bar (902).

9. A safety self-locking flat gate valve according to claim 8, characterized in that: One end of the top of the sliding rod (902) is engaged with the bottom of the rotating disk (8), and the bottom of the rotating disk (8) is provided with tooth grooves distributed in an annular shape, and the meshing teeth on one side of the tooth groove surface are in a right angle shape, and the other side is in a slope shape.

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