Safety self-locking flat gate valve

Abstract

The application discloses a safe self-locking flat plate gate valve and relates to the technical field of valves.The safe self-locking flat plate 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 the medium flow circulation in the valve, the protection mechanism is arranged on one side of the valve seat mechanism, the protection mechanism is used for protecting the work of the valve plate, the inside of the protection mechanism is communicated with the inside of the valve seat mechanism, and the other side of the valve seat mechanism and the other end of the protection mechanism are both provided with a butt joint mechanism, the sealing adjustment is realized by rotating the adjusting bolt outside the valve body; the adjusting bolt moves to the inside of the valve body and abuts against the adjusting block, the adjusting block is moved to the valve plate in the inside of the valve body, the 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 does not need to disassemble the valve, and can be completed by only tightening the adjusting bolt outside, and the convenience of the valve maintenance is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a safety self-locking flat gate valve. Background Technology

[0002] Flat gate valves are widely used in various industries such as petrochemicals, natural gas, power, and urban water supply and drainage, especially in high-temperature, high-pressure, and corrosive media environments, ensuring the safety and stability of the production process. A search revealed a Chinese patent publication number CN112610709A that discloses a flat gate valve. While this flat gate valve has dual functions of shut-off and check valve, is not easily damaged on the sealing surface, and boasts good sealing performance and a long service life, friction between the valve seat and valve plate leads to a decrease in sealing performance over time. Although the valve seat's sealing ring can be replaced, it requires disassembling the valve from the pipeline and then disassembling the valve body to replace the internal valve seat, making maintenance and replacement cumbersome and requiring pipeline shutdown, thus reducing the valve's ease of use.

[0003] A search revealed that Chinese patent publication number CN107270020A discloses a flat gate valve. Although this valve uses a limiting and reinforcing auxiliary mechanism to enhance the axial limiting effect of the external pipeline, and the main function of the limiting and reinforcing auxiliary mechanism is to seal the external pipeline and the valve body, while the axial limiting mechanism enhances the sealing performance in the axial direction to prevent the external pipeline from detaching, the valve plate is prone to water hammer effect at the moment of closing. When the water hammer pressure impacts the valve plate, the instantaneous high pressure generated by the water hammer can impact the valve plate, which may cause the valve plate to deform, crack or be damaged. Furthermore, the sealing surface between the valve plate and the valve seat may be damaged by the water hammer impact, resulting in a decrease in sealing performance and leakage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a safe, self-locking flat gate valve, which solves the problems mentioned in the background art, such as the cumbersome use and maintenance of existing valves and their susceptibility to damage caused by water hammer.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a safety self-locking flat gate valve, comprising a valve seat mechanism, a protective mechanism, a limiting groove, and a valve plate. The valve seat mechanism is used to control the flow of the internal medium of the valve. A protective mechanism is provided on one side of the valve seat mechanism to protect the valve plate. The protective mechanism is internally connected to the valve seat mechanism. A docking mechanism is provided on the other side of the valve seat mechanism at the other end of the protective mechanism. The docking mechanism is used to connect the valve to an external pipeline. A support frame is provided on the top of the valve seat mechanism, and the bottom of the support frame is bolted to the top of the valve seat mechanism. One end of the component is connected, and the support frame is provided with a limiting groove inside. The limiting groove has holes at both ends, and the holes at both ends of the limiting groove are connected to the top of the valve seat mechanism by bolts. A valve plate is provided inside the limiting groove. One bottom end of the valve plate is inserted into the valve seat mechanism, and the two sides of the top end of the valve plate slide in contact with the inside of the limiting groove. One top end of the valve plate is welded to the valve stem. The outer wall of the valve stem 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. The self-locking mechanism is used for the turntable to self-lock.

[0006] Preferably, the valve seat mechanism includes two valve bodies welded together. A valve plate is positioned between the two valve bodies. The bottom of the valve plate has an arc-shaped structure, and its bottom edge is rounded and chamfered. The surface of the valve plate is in close contact with the inner surface of the valve body and slides in contact. Circular light-transmitting holes are provided inside the two valve bodies. The interior of each valve body has a hollow structure, and an adjusting block is provided inside the hollow structure. Adjusting bolts are provided at four ends of the adjusting block, and the adjusting bolts are threadedly connected to the valve seat body. The arc-shaped bottom of the valve plate and the rounded chamfered edges allow for a tight fit between the valve plate and the inner surface of the valve body, reducing the risk of media leakage. Simultaneously, the sliding contact between the valve plate and the valve body ensures smooth sealing operation during valve opening and closing. The adjusting block further enhances the sealing performance. By adjusting the adjusting bolts, the position of the adjusting block can be finely adjusted to ensure a tighter fit between it and the sealing surface of the valve plate, effectively compensating for wear on the sealing surface caused by long-term use and maintaining the valve's sealing performance.

[0007] Preferably, the adjusting block has a circular through hole for media flow, and one side of the adjusting block has an annular protrusion that fits tightly against the valve plate surface. The shape of the adjusting block matches the cross-sectional shape of the valve body's internal cavity, and the outer wall of the adjusting block slides in contact with the inner wall of the valve body's internal cavity. There is a gap between one side of the adjusting block and the inner wall of the valve body's internal cavity, and a first sealing ring and a second sealing ring are embedded on the surface of the adjusting block. The sliding contact between the outer wall of the adjusting block and the inner wall of the valve body, along with the gap between one side of the adjusting block and the inner wall of the valve body, ensures flexible movement of the adjusting block within the valve body, and the second sealing ring ensures a high level of sealing between the adjusting block and the valve body.

[0008] Preferably, the protective mechanism includes a water inlet pipe, one end of which is welded to the valve body, and the bottom of which is welded to the top of the buffer chamber. The top of the buffer chamber is connected to the inside of the water inlet pipe. A piston is installed inside the buffer chamber, and a rubber sealing ring is fitted on the outside of the piston. The piston slides in contact with the inner wall of the buffer chamber. A first spring is installed at the bottom of the buffer chamber. When water hammer 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 water hammer on the internal components of the valve (such as the valve plate and valve seat) and protecting the valve from damage. By absorbing the impact force of water hammer through the buffer mechanism, the risk of deformation or damage to 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.

[0009] 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 slides in contact with the inner wall of the buffer chamber. The design of the threaded column and knob at the bottom of the buffer chamber allows users to adjust the compression of the first spring according to the actual working conditions. By adjusting the position of the threaded column by the knob, the preload of the spring can be changed, thereby adapting to different fluid pressures and water hammer intensities. This adjustability enables the valve to better cope with complex working conditions, enhancing its applicability and flexibility.

[0010] Preferably, the docking mechanism includes two connectors, which are welded to the valve body and the inlet pipe, respectively. Two set screws are symmetrically distributed on the outside of each connector, and these set screws are threaded to the outer wall of the connector. An adjusting head is located inside the connector, and its outer wall is designed with multiple annular protrusions and fitted with a third sealing ring to enhance the sealing performance between the adjusting head and the connector. Simultaneously, the adjusting head and the connector are rotatably connected via an annular groove and a retaining groove, allowing the valve to be adjusted at an angle as needed during installation.

[0011] Preferably, the outer wall of the adjusting head has multiple annular protrusions distributed at equal intervals, and a third sealing ring is embedded on the surface of the annular protrusions. The connector has annular grooves distributed at equal intervals in a straight line. The connector is rotatably connected to the outer wall of the adjusting head through the annular grooves. One end of the adjusting head has an annular groove at equal intervals, and one end of the set screw is inserted into the groove at the end of the adjusting head. The end of the adjusting head is designed with an annular groove at equal intervals, and one end of the set screw can be inserted into the groove. By tightening the set screw, the adjusting head can be fixed in the connector, ensuring that the connection angle between the valve and the pipeline is accurate and stable. The set screw provides reliable fixing force through threaded connection, ensuring that the adjusting head will not loosen due to external force or vibration after installation.

[0012] Preferably, the self-locking mechanism includes two sliders, one of which is welded to a support frame. A second spring is disposed between the two sliders and is fitted onto the outside of a slide rod. A limit block is welded to the outer wall of the slide rod, with the bottom of the limit block contacting the top of the spring. The slide rod slides in contact with the inside of the two sliders. A pull ring is welded to one end of the bottom of the slide rod. The design of the self-locking mechanism effectively prevents the valve from being accidentally opened due to external force or misoperation. When the valve is closed, the slide rod, under the action of the spring, locks the turntable, preventing it from rotating in the opposite direction, thus ensuring that the valve remains closed and avoiding the risk of medium leakage. The slide rod can be manually pulled down by the pull ring to disengage it from the turntable, thereby releasing the self-locking state. This design ensures the safety of the valve during normal operation and allows for manual opening of the valve when needed, improving operational flexibility.

[0013] Preferably, one end of the slide rod engages with the bottom of the turntable. The bottom of the turntable has a ring of toothed grooves, with one side of the toothed groove being right-angled and the other side being sloped. When the top of the slide rod contacts the right-angled surface of the toothed groove, the slide rod cannot continue to move upward due to the blocking effect of the right-angled surface, thus locking the turntable in the current position and preventing it from rotating in the opposite direction. When the turntable rotates normally, the top of the slide rod will slide along the slope and be compressed downward, thus allowing the turntable to rotate smoothly. This design allows the valve to close smoothly during normal operation and to lock automatically after closing.

[0014] This invention provides a safe, self-locking flat gate valve. It has the following advantages:

[0015] (1) The safety self-locking flat gate valve, during operation, the valve plate is driven by the valve stem to slide up and down between the two valve bodies to realize the opening and closing of the valve; the seal between the valve body and the valve plate is achieved by the adjusting block; as the valve is used for a long time, gaps may appear on the sealing surface between the valve plate and the adjusting block, resulting in a decrease in sealing performance; at this time, the sealing performance can be adjusted by rotating the adjusting bolt on the outside of the valve body; one end of the adjusting bolt moves into the valve body and abuts against the adjusting block, causing the adjusting block to move towards the valve plate inside the valve body, thereby eliminating the gap between the sealing surface between the valve plate and the adjusting block and restoring the sealing performance; the sealing performance adjustment of this valve does not require disassembling the valve, but only requires tightening the external adjusting bolt, which significantly improves the convenience of valve maintenance.

[0016] (2) This safety self-locking flat gate valve achieves sealing by rotating the valve plate when closed; when water hammer occurs in the pipeline, the high pressure generated by the water flow impacts the inside of the valve, and the pressure acts 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 water hammer on the valve; when the water pressure in the pipeline returns to normal, the first spring releases elastic potential energy and pushes the piston to reset; in addition, the valve is equipped with an adjustable protection mechanism; by rotating the knob, the knob drives the threaded column to rotate, and the threaded column cooperates with the lifting block through its external thread, so that the lifting block moves upward along the axis, thereby compressing the first spring; in this way, the preload of the first spring can be adjusted, thereby adjusting the buffering capacity of the buffer mechanism according to the actual working conditions, and enhancing the adaptability and adjustability of the protection mechanism.

[0017] (3) The safety self-locking flat gate valve is installed by connecting the valve to the external pipeline through the thread of one end of the two adjusting heads. When the valve angle needs to be adjusted after the two adjusting heads are installed and fixed, the set screw is loosened and one end of the set screw will move out of the groove at one end of the adjusting head, so that the valve body between the two adjusting heads can be adjusted. When the appropriate angle is adjusted, the set screw is tightened so that one end of the set screw can be inserted into the groove, so that the angle of the valve body can be fixed, thereby improving the adjustability of the valve during installation.

[0018] (4) In this type of safety self-locking flat gate valve, when the turntable rotates to close the valve, the second spring pushes the slide rod upward, so that the top end 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 surface of the meshing teeth at the bottom of the turntable, and then retract downward, so that the turntable can rotate normally to close the valve. When the turntable is subjected to external force to rotate in the opposite direction, the second spring pushes the top end of the slide rod to engage with the right angle surface of the inner teeth at the bottom of the turntable, so that the turntable can automatically lock, avoiding the turntable from rotating due to external force and causing the valve to open accidentally. By pulling the retaining ring at the bottom of the slide rod, the slide rod can move downward, so that the slide rod can disengage from the turntable and the turntable can open the valve normally, which greatly improves the safety of the valve during use.

[0019] This solves the problem that existing valves are troublesome to use and maintain, and are easily damaged by water hammer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a front view structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram showing the connection between the turntable and the self-locking mechanism of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the water inlet pipe of the present invention;

[0025] Figure 6 This is a schematic diagram showing the connection between the valve plate and the valve body of the present invention;

[0026] Figure 7 This is a schematic diagram showing the connection between the valve body and the regulating block of the present invention;

[0027] Figure 8 This is a schematic diagram of the adjusting block structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention.

[0029] In the diagram, 1. Valve seat mechanism; 101. Valve body; 102. Adjusting bolt; 103. Adjusting block; 104. First sealing ring; 105. Second sealing ring; 2. Protective mechanism; 201. Inlet pipe; 202. Buffer chamber; 203. Piston; 204. First spring; 205. Lifting block; 206. Knob; 207. Threaded column; 3. Connecting mechanism; 301. Connector; 302. Set screw; 303. Adjusting head; 304. Third sealing ring; 305. Slot; 4. Support frame; 5. Limiting groove; 6. Valve plate; 7. Valve stem; 8. Turntable; 9. Self-locking mechanism; 901. Slider; 902. Sliding rod; 903. Limiting block; 904. Second spring; 905. Pull ring; 10. Connecting seat. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0031] Please see Figure 1-9This invention provides a technical solution: a safety self-locking flat gate valve, including a valve seat mechanism 1, a protective mechanism 2, a limiting groove 5, and a valve plate 6. The valve seat mechanism 1 is used to control the flow of the internal medium of the valve. A protective mechanism 2 is provided on one side of the valve seat mechanism 1 to protect the valve plate 6. The protective mechanism 2 is internally connected to the valve seat mechanism 1. A docking mechanism 3 is provided on the other side of the valve seat mechanism 1 and the other end of the protective mechanism 2. The docking mechanism 3 is used to connect the valve to an external pipeline. A support frame 4 is provided on the top of the valve seat mechanism 1. The bottom of the support frame 4 is connected to the top end of the valve seat mechanism 1 by bolts. A limiting groove 5 is provided inside the support frame 4. Holes are provided at both ends of the limiting groove 5. The holes 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. One bottom end of the valve plate 6 is inserted into the valve seat mechanism 1, and the two sides of the top end of the valve plate 6 slide against the inside of the limiting groove 5. The valve seat mechanism 1 includes a valve body 101, two valve bodies 101 are provided and welded to each other, and a valve plate 6 is provided between the two valve bodies 101. The bottom of the valve plate 6 is welded to the valve stem 7, the outer wall of the valve stem 7 is threaded 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, and a self-locking mechanism 9 is provided on one side of the support frame 4. The self-locking mechanism 9 is used for the self-locking operation of the turntable 8. The valve seat mechanism 1 includes a valve body 101, 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 has an arc-shaped structure, and the bottom edge of the valve plate 6 is rounded and chamfered. The surface of the valve plate 6 is in close contact with the inner surface of the valve body 101 and slides in contact. The two valve bodies 101 are provided with a circular light-transmitting hole. The inside of the valve body 101 is hollow, and an adjusting block 103 is provided inside the hollow structure of the valve body 101. Adjusting bolts 102 are provided at the four ends of the adjusting block 103, and the adjusting bolts 102 are threaded to the valve seat body.The regulating block 103 has a circular through hole for media flow. One side of the regulating block 103 has an annular protrusion that fits tightly against the surface of the valve plate 6. The shape of the regulating block 103 matches the cross-sectional shape of the internal cavity of the valve body 101. The outer wall of the regulating block 103 slides in contact with the inner wall of the internal cavity of the valve body 101. A gap exists between one surface of the regulating block 103 and the inner wall of the internal cavity of the valve body 101. A first sealing ring 104 and a second sealing ring 105 are embedded on the surface of the regulating block 103. During operation, the valve plate 6 slides up and down between the two valve bodies 101 via the valve stem 7, thus switching the valve on / off. The valve body 101 and the valve plate 6 are sealed by the regulating block 103. When the sealing surface between the valve plate 6 and the adjusting block 103 deteriorates due to prolonged use, gaps may appear, leading to a decrease in sealing performance. By rotating the adjusting bolt 102 on the outside of the valve body 101, one end of the adjusting bolt 102 moves inwards, pressing against the adjusting block 103. This allows the adjusting block 103 to move within the valve body 101, and ultimately towards the valve plate 6, eliminating the gaps between the adjusting block 103 and the valve plate 6. This maintains the sealing performance of the valve plate 6. This valve can be adjusted without disassembling; simply tightening the adjusting bolt 102 on the outside of the valve significantly improves the convenience of valve maintenance.

[0032] Implementation: 2;

[0033] Please see Figure 1-5This invention provides a technical solution: a safe self-locking flat gate valve. The protective mechanism 2 includes an inlet pipe 201, one end of which is welded to the valve body 101, and the bottom of the inlet pipe 201 is welded to the top of a buffer chamber 202. The top end of the buffer chamber 202 communicates with the inside of the inlet pipe 201. A piston 203 is installed inside the buffer chamber, and a rubber sealing ring is fitted around the outside of the piston 203. The piston 203 slides in contact with the inner wall of the buffer chamber 202. A first spring 204 is installed at the bottom of the buffer chamber 202. The bottom of the buffer chamber 202 is threadedly connected to a threaded post 207. A knob 206 is welded to the bottom of the threaded post 207, and a lifting block 205 is welded to the top end of the threaded post 207. The outer wall of the lifting block 205 slides in contact with the inner wall of the buffer chamber 202. The valve plate 6 is closed by rotating the turntable 8. When the pipeline... When water hammer occurs, the water pressure impacts the inside of the valve, pushing the piston 203 inside the buffer chamber 202. This piston 203 then compresses the first spring 204 inside the buffer chamber 202. The first spring 204 weakens the pressure generated by the water hammer, thus protecting the valve and reducing the impact of water hammer pressure. When the water pressure inside the valve returns to normal, the spring pushes the piston 203 to reset. By rotating the knob 206, the knob 206 drives the threaded column 207 to rotate. The threaded column 207 moves upward through the external threads, pushing the lifting block 205 to compress the first spring 204, thereby adjusting the pressure of the first spring 204. This improves the adjustability of the protection mechanism 2. Example 3:

[0034] Please see Figure 1-5This invention provides a technical solution: a safety self-locking flat gate valve, wherein the docking mechanism 3 includes a connector 301, two connectors 301 are provided, the two connectors 301 are welded to the valve body 101 and the water inlet pipe 201 respectively, two set screws 302 are symmetrically distributed on the outside of the connector 301, the set screws 302 are threaded to the outer wall of the connector 301, and an adjusting head 303 is provided inside the connector 301; the outer wall of the adjusting head 303 has multiple annular protrusions distributed at equal intervals, and a third sealing ring 304 is embedded on the surface of the annular protrusions; the connector 301 has annular grooves distributed at equal intervals in a straight line, and the inside of the connector 301 is rotatably connected to the outer wall of the adjusting head 303 through the annular grooves; one end of the adjusting head 303 is... The valve body 101 has an annularly spaced groove 305, with one end of the set screw 302 inserted into the groove 305 at the end of the adjusting head 303. During installation, the valve is fixedly connected to the external pipeline via the threads at one end of the adjusting heads 303. When the valve angle needs to be adjusted after the two adjusting heads 303 are installed and fixed, the set screw 302 is loosened, and one end of the set screw 302 moves out of the groove 305 at one end of the adjusting head 303, thereby allowing the valve body 101 between the two adjusting heads 303 to be angled. After adjusting to the appropriate angle, the set screw 302 is tightened, allowing one end of the set screw 302 to be inserted into the groove 305, thereby fixing the angle of the valve body 101 and improving the adjustability of the valve during installation. Example 4:

[0035] Please see Figure 1-4This invention provides a technical solution: a safety self-locking flat gate valve. The self-locking mechanism 9 includes two sliders 901, one side of which is welded to a support frame 4. A second spring 904 is disposed between the two sliders 901, and the second spring 904 is fitted onto the outside of a slide rod 902. A limit block 903 is welded to the outer wall of the slide rod 902, and the bottom of the limit block 903 contacts the top of the spring. The slide rod 902 slides in contact with the inside of the two sliders 901. A pull ring 905 is welded to one bottom end of the slide rod 902. One top end of the slide rod 902 engages with the bottom of a turntable 8. The bottom of the turntable 8 has annularly distributed toothed grooves, with one side of the toothed grooves being right-angled and the other side being sloped. When the turntable 8 rotates to close the valve, the second spring 904 causes the valve to... The second spring 904 can push the slide rod 902 upward, so that the top end of the slide rod 902 can engage with the toothed groove at the bottom of the turntable 8. When the turntable 8 rotates, the top of the slide rod 902 will contact the slope of the meshing teeth at 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 subjected to external force to rotate in the opposite direction, under the push of the second spring 904, the top end of the slide rod 902 engages with the right angle surface of the inner teeth at the bottom of the turntable 8, so that the turntable 8 can be automatically locked to prevent the turntable 8 from rotating due to external force and causing the valve to open accidentally. By pulling the retaining ring at the bottom of the slide rod 902, the slide rod 902 can move downward, so that the slide rod 902 can disengage from the turntable 8 and the turntable 8 can open the valve normally, which greatly improves the safety of the valve during use.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 includes a valve seat mechanism (1), a protective mechanism (2), a limiting 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 protective mechanism (2) is provided on one side of the valve seat mechanism (1) to protect the valve plate (6). The interior of the protective mechanism (2) is connected to the interior of the valve seat mechanism (1). A docking mechanism (3) is provided on the other side of the valve seat mechanism (1) and the other end of the protective mechanism (2). The docking mechanism (3) is used to connect the valve to an external pipeline. A support frame (4) is provided 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 limiting groove (5) is provided inside the support frame (4). The limiting groove (5) has holes at both ends. The holes 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). One bottom end of the valve plate (6) is inserted into the valve seat mechanism (1). The two sides of the top end of the valve plate (6) are in sliding contact with the inside of the limiting groove (5). One top end of the valve plate (6) is welded to the valve rod (7). The outer wall of the valve rod (7) is threaded 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 provided on one side of the support frame (4). The self-locking mechanism (9) is used for the turntable (8) to self-lock. The valve seat mechanism (1) includes a valve body (101), two valve bodies (101) are provided and welded to each other. A valve plate (6) is provided between the two valve bodies (101). The bottom of the valve plate (6) is arc-shaped and the bottom edge of the valve plate (6) is rounded and chamfered. The surface of the valve plate (6) is in close contact with the inner surface of the valve body (101) and slides in contact. A circular light-transmitting hole is provided inside the two valve bodies (101). The inside of the valve body (101) is hollow. An adjusting block (103) is provided inside the hollow structure of the valve body (101). An adjusting bolt (102) is provided at each of the four ends of the adjusting block (103). The adjusting bolt (102) is threadedly connected to the valve seat body. The protective mechanism (2) includes a water inlet pipe (201), one end of which is welded to the valve body (101), the bottom of which is welded to the top of the buffer chamber (202), and the top end of the buffer chamber (202) is connected to the inside of the water inlet pipe (201). A piston (203) is provided inside the buffer chamber (202), a rubber sealing ring is fitted on the outside of the piston (203), the piston (203) slides in contact with the inner wall of the buffer chamber (202), and a first spring (204) is provided at the bottom of the buffer chamber (202). The docking mechanism (3) includes a connector (301), and there are two connectors (301). The two connectors (301) are welded to the valve body (101) and the water inlet pipe (201) respectively. Two set screws (302) are symmetrically distributed on the outside of the connector (301). The set screws (302) are threaded to the outer wall of the connector (301). An adjusting head (303) is provided inside the connector (301). The self-locking mechanism (9) includes two sliders (901), and one side of each slider (901) is welded to the support frame (4). A second spring (904) is provided between the two sliders (901). The second spring (904) is fitted onto the outside of 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) slides in contact with the inside of the two sliders (901). A pull ring (905) is welded to one end of the bottom of the slide rod (902).

2. The safety self-locking flat gate valve according to claim 1, characterized in that: The regulating block (103) has a circular through hole for medium flow. One side of the regulating block (103) has an annular protrusion structure, and the surface of the annular protrusion structure on one side of the regulating block (103) is in close contact with the surface of the valve plate (6). The shape of the regulating block (103) matches the cross-sectional shape of the internal cavity of the valve body (101), and the outer wall of the regulating block (103) slides in contact with the inner wall of the internal cavity of the valve body (101). There is a gap between one side of the regulating block (103) and the inner wall of the internal cavity of the valve body (101), and the surface of the regulating block (103) is fitted with a first sealing ring (104) and a second sealing ring (105).

3. The safety self-locking flat gate valve according to claim 1, characterized in that: The bottom of the buffer chamber (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). The outer wall of the lifting block (205) slides in contact with the inner wall of the buffer chamber (202).

4. The safety self-locking flat gate valve according to claim 1, characterized in that: The outer wall of the adjusting head (303) has multiple annular protrusions distributed at equal intervals, and a third sealing ring (304) is embedded on the surface of the annular protrusions. The connecting head (301) has annular grooves distributed at equal intervals in a straight line. The interior of the connecting head (301) is rotatably connected to the outer wall of the adjusting head (303) through the annular grooves. One end of the adjusting head (303) has a slot (305) with equal intervals in annular shape, and one end of the set screw (302) is inserted into the slot (305) at the end of the adjusting head (303).

5. The safety self-locking flat gate valve according to claim 1, characterized in that: The top end of the slide bar (902) engages with the bottom of the turntable (8). The bottom of the turntable (8) has a ring of toothed grooves, and one side of the toothed groove surface is right-angled while the other side is sloped.

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