Hydrostop valve

Abstract

The present application relates to the technical field of valve, disclose liquid control stop valve, the liquid control stop valve includes valve body, valve core and floating assembly, the valve body is opened with the first sliding channel and the second sliding channel who is crossed and is communicated arrangement, the valve body is provided with import end and export end. The valve core is slidably arranged in the first sliding channel, the valve core is opened with annular groove and through hole, the through hole is communicated in the second sliding channel. The floating piece is arranged at the end of the reversing rod, the reversing rod is provided with first protrusion and second protruous, the reversing rod can be slidably arranged in the second sliding channel and through hole. The vertical movement of the floating piece is converted into the horizontal movement of the valve core, only when the liquid level reaches the preset height can the opening or closing action be performed, avoiding the chattering phenomenon of frequent opening and closing caused by instantaneous change of liquid level, having the effect of time delay, strong anti-interference ability, high reliability.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to hydraulically controlled shut-off valves. Background Technology

[0002] Among existing liquid level control valve technologies, float valves are the most widely used solution due to their simple structure and low cost. A typical structure involves directly connecting a float to the valve core via a rigid lever, forming a mechanical linkage system. When the liquid level in the container changes, the float rises and falls with the liquid level, instantly driving the valve core through the lever, thereby controlling the opening or closing of the valve.

[0003] However, in practical engineering applications, such as water tank replenishment and industrial storage tank drainage, the liquid level inside the container does not always remain stable. Instead, it is easily disturbed by factors such as liquid inflow impact, medium turbulence, and external vibration, resulting in frequent up-and-down fluctuations. Any instantaneous fluctuation in the liquid level will directly trigger the reciprocating action of the valve core, causing the valve to open and close frequently in a short period of time, i.e., producing a "chatter" phenomenon, which seriously affects the reliability and service life of the valve. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulically controlled shut-off valve to solve the aforementioned problems existing in liquid level control valves in related technologies.

[0005] To address the aforementioned problems in the existing technology, the present invention adopts the following technical solution:

[0006] Hydraulic shut-off valve, including:

[0007] The valve body has a first sliding channel and a second sliding channel that are intersected and connected, and the valve body has an inlet end and an outlet end.

[0008] The valve core is slidably disposed in the first sliding channel, and the valve core has an annular groove and a through hole, the through hole being connected to the second sliding channel;

[0009] A floating assembly includes a reversing rod and a floating element. The floating element is disposed at the end of the reversing rod. The reversing rod is provided with a first protrusion and a second protrusion. The reversing rod can slide through the second sliding channel and the through hole, so that the valve body is in an open state and a closed state. When the valve body is in the closed state, the first protrusion is located in the through hole and pushes the valve core, so that the inlet end and the outlet end are both disconnected from the annular groove. When the valve body is in the open state, the second protrusion is located in the through hole and pushes the valve core in the opposite direction, so that the inlet end and the outlet end are both connected to the annular groove.

[0010] As an optional technical solution, the first protrusion and the second protrusion are spaced apart along the axial direction of the reversing rod, and the first protrusion and the second protrusion are spaced apart along the circumferential direction of the reversing rod.

[0011] As an optional technical solution, the floating component further includes a stop member, which is disposed at the other end of the reversing rod away from the floating component. The valve body has a first limiting end face, and one end opening of the second sliding channel extends through the first limiting end face. The stop member can abut against the first limiting end face.

[0012] As an optional technical solution, when the valve body is in the open state, the second protrusion is located in the through hole, and the stop member abuts against the first limiting end face.

[0013] As an optional technical solution, the floating component further includes a limiting member disposed on the reversing rod, and the valve body also has a second limiting end face. The other end opening of the second sliding channel extends through the second limiting end face, and the limiting member can abut against the second limiting end face.

[0014] As an optional technical solution, when the valve body is in the closed state, the first protrusion is located in the through hole, and the limiting member abuts against the second limiting end face.

[0015] As an optional technical solution, it also includes a first fixing member, the valve body is provided with a first connecting hole, the reversing rod is provided with a first guide hole, the first guide hole extends along the axial direction of the reversing rod, one end of the first fixing member is connected to the first connecting hole, and the other end of the first fixing member passes through the first guide hole and can slide along the extension direction of the first guide hole.

[0016] As an optional technical solution, a second fixing member is also included. The valve body is also provided with a second connecting hole, and the valve core is also provided with a second guide hole. The second guide hole extends along the sliding direction of the valve core. One end of the second fixing member is connected to the second connecting hole, and the other end of the second fixing member passes through the second guide hole and can slide along the extending direction of the second guide hole.

[0017] As an optional technical solution, the first protrusion is provided with a first guide surface, which is used to guide the first protrusion into the through hole. When the valve body switches from the open state to the closed state, the first guide surface has a force applied to the valve core, so that the first protrusion can push the valve core.

[0018] As an optional technical solution, the second protrusion is provided with a second guide surface, which is used to guide the second protrusion into the through hole. When the valve body switches from the closed state to the open state, the second guide surface has a force applied to the valve core, so that the second protrusion can push the valve core.

[0019] The hydraulic shut-off valve provided by this invention has at least the following beneficial effects:

[0020] This hydraulic shut-off valve includes a valve body, a valve core, and a floating assembly. The valve body has a first sliding channel and a second sliding channel that are intersected and interconnected. The valve body has an inlet end and an outlet end. The valve core is slidably disposed in the first sliding channel and has an annular groove and a through hole, the through hole connecting to the second sliding channel. The floating assembly includes a reversing rod and a floating element. The floating element is disposed at the end of the reversing rod, which has a first protrusion and a second protrusion. The reversing rod can slide through the second sliding channel and the through hole. When the liquid level rises to a preset maximum height, the floating element drives the reversing rod to rise synchronously. The first protrusion slides within the through hole and applies force to the valve core, pushing the valve core so that both the inlet end and the outlet end are disconnected from the annular groove, thus closing the valve body. When the liquid level drops to a preset minimum height, the floating element drives the reversing rod to fall synchronously. The second protrusion slides within the through hole and applies force to the valve core, pushing the valve core in the opposite direction, so that the inlet end connects to the outlet end through the annular groove, thus opening the valve body. The vertical movement of the floating component is converted into the horizontal movement of the valve core. The opening or closing action can only be performed when the liquid level reaches the preset height, avoiding the flutter phenomenon caused by frequent opening and closing due to instantaneous changes in liquid level. It has a delay effect, strong anti-interference ability, and high reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the hydraulic shut-off valve in an embodiment of the present invention;

[0022] Figure 2 This is a front cross-sectional view of the hydraulic shut-off valve in the open state in an embodiment of the present invention;

[0023] Figure 3 This is a top cross-sectional view of the hydraulic shut-off valve in the open state in an embodiment of the present invention;

[0024] Figure 4 This is a front cross-sectional view of the hydraulic shut-off valve in the closed state in an embodiment of the present invention;

[0025] Figure 5 This is a top cross-sectional view of the hydraulic shut-off valve in the closed state in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Valve body; 11. First sliding channel; 12. Second sliding channel; 13. Inlet end; 14. Outlet end; 15. First limiting end face; 16. Second limiting end face;

[0028] 2. Valve core; 21. Annular groove; 22. Through hole; 23. Second guide hole;

[0029] 3. Reversing rod; 31. First protrusion; 311. First guide surface; 32. Second protrusion; 321. Second guide surface; 33. First guide hole;

[0030] 4. Floating components;

[0031] 5. Stop components;

[0032] 6. Limiting components;

[0033] 7. First fastener;

[0034] 8. Second fastener. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Float valves are the most widely used solution due to their simple structure and low cost. Their typical structure involves directly connecting a float to the valve core via a rigid lever, forming a mechanical linkage system. When the liquid level in the container changes, the float rises and falls with the liquid level, instantly driving the valve core through the lever to open or close the valve. However, in existing technologies, the liquid level in the container is not always stable; it is easily affected by factors such as inflow impact, medium turbulence, and external vibrations, resulting in frequent up-and-down fluctuations. Any instantaneous fluctuation in the liquid level directly triggers the reciprocating motion of the valve core, causing the valve to open and close frequently in a short period, i.e., "fluttering," which seriously affects the reliability and service life of the valve.

[0040] like Figures 1 to 5 As shown, this embodiment provides a hydraulically controlled shut-off valve, which includes a valve body 1, a valve core 2, and a floating assembly. The valve body 1 has a first sliding channel 11 and a second sliding channel 12 that are intersected and interconnected, and has an inlet end 13 and an outlet end 14. The valve core 2 is slidably disposed in the first sliding channel 11, and has an annular groove 21 and a through hole 22, the through hole 22 being connected to the second sliding channel 12. The floating assembly includes a reversing rod 3 and a floating element 4. The floating element 4 is disposed at the end of the reversing rod 3. The reversing rod 3 is provided with a first protrusion 31 and a second protrusion 32. The reversing rod 3 can slide through the second sliding channel 12 and the through hole 22, so that the valve body 1 is in an open state and a closed state. When the valve body 1 is in the closed state, the first protrusion 31 is located in the through hole 22 and pushes the valve core 2, so that the inlet end 13 and the outlet end 14 are both disconnected from the annular groove 21. When the valve body 1 is in the open state, the second protrusion 32 is located in the through hole 22 and pushes the valve core 2 in the opposite direction, so that the inlet end 13 and the outlet end 14 are both connected to the annular groove 21.

[0041] The valve body 1 has a cross-shaped internal structure, including a first sliding channel 11 extending horizontally and a second sliding channel 12 extending vertically, i.e., the first sliding channel 11 and the second sliding channel 12 are perpendicularly arranged. The two opposite sidewalls of the valve body 1 are respectively provided with an inlet end 13 and an outlet end 14, which are correspondingly arranged and both connected to the first sliding channel 11. The inlet end 13 is used for connecting an external water inlet pipe or compressed air inlet, and the outlet end 14 is used for connecting an external water outlet pipe or compressed air outlet. When an external water inlet or outlet pipe is connected, the valve body 1 is closed to stop water replenishment when the liquid level is high, and opened to replenish water when the liquid level is low. When an external compressed air inlet or outlet is connected, the flow of the air source is controlled to replenish or drain the water tank.

[0042] The valve core 2 is located within the first sliding channel 11 and can slide along the extension direction of the first sliding channel 11. The valve core 2 has an annular groove 21 and a through hole 22. Specifically, a groove is formed on the outer peripheral surface of the valve core 2 near the inlet end 13 and the outlet end 14. The groove extends along the outer peripheral direction of the valve core 2 in an annular structure. When the valve core 2 slides relative to the valve body 1, the annular groove 21 can connect or disconnect the inlet end 13 and the outlet end 14. When the annular groove 21 is directly opposite the inlet end 13 and the outlet end 14, the inlet end 13 is connected to the outlet end 14 through the annular groove 21. When the annular groove 21 is misaligned with the inlet end 13 and the outlet end 14, the valve core 2 blocks the inlet end 13 and the outlet end 14, thus disconnecting the inlet end 13 and the outlet end 14. The valve core 2 also has a through hole 22. The central axis of the through hole 22 is parallel to the central axis of the second sliding channel 12, and the diameter of the through hole 22 is smaller than the diameter of the second sliding channel 12.

[0043] The working principle of the floating component 4 is based on Archimedes' principle of buoyancy. By sensing changes in the liquid level, it drives the valve core 2 to automatically open or close the fluid. The floating component 4 is a float ball, which is fixedly installed to the end of the reversing rod 3 by bolts. The floating component 4 floats on the liquid surface and moves up and down synchronously with the rise and fall of the liquid level. The reversing rod 3 has a first protrusion 31 and a second protrusion 32. The first protrusion 31 and the second protrusion 32 can be configured as wedges. The first protrusion 31 and the second protrusion 32 are centrally symmetrically distributed with respect to the center of symmetry of the reversing rod 3, that is, the first protrusion 31 and the second protrusion 32 are staggered vertically on both sides of the reversing rod 3. The sum of the outer diameter of the reversing rod 3 and the outer diameter of the first protrusion 31 is equal to the diameter of the through hole 22. While the reversing rod 3 located in the second sliding channel 12 slides through the through hole 22, it ensures that the first protrusion 31 and the second protrusion 32 can slide through the through hole 22 and apply force to the inner wall of the through hole 22.

[0044] A hydraulic shut-off valve is installed at the inlet of the water tank to control the water level. The maximum and minimum water levels are preset, and the valve controls the water level within these preset ranges. When the water level rises to the preset maximum height, the floating element 4 rises synchronously with the water level, driving the reversing rod 3 to slide upwards along the second sliding channel 12 and the through hole 22. The second protrusion 32 slides out of the through hole 22 until the first protrusion 31 slides into the through hole 22. The first protrusion 31 applies force to the valve core 2, pushing it to the right side relative to the valve body 1. This causes the annular groove 21 to be misaligned with both the inlet end 13 and the outlet end 14. At this point, the inlet end 13 and the outlet end 14 are disconnected, closing the valve body 1 and stopping the replenishment of water to the tank. When the liquid level drops to the preset minimum height, the floating component 4 descends synchronously with the liquid level, driving the reversing rod 3 to slide down along the second sliding channel 12 and the through hole 22. The first protrusion 31 slides out of the through hole 22 until the second protrusion 32 slides into the through hole 22. The second protrusion 32 applies a force to the valve core 2, pushing the valve core 2 to the left side relative to the valve body 1, so that the annular groove 21 is aligned with the inlet end 13 and the outlet end 14. The inlet end 13 and the outlet end 14 are connected, realizing the opening action of the valve body 1 and replenishing water to the water tank. It should be noted that the distance between the first protrusion 31 and the second protrusion 32 relative to the reversing rod 3 determines the height difference between the high and low liquid levels and the time of delayed opening and closing. When the liquid level fluctuates between the preset maximum height and the preset minimum height, the valve body 1 always remains in the open or closed state, and the fluctuation of the liquid level will not affect the state of the valve body 1.

[0045] The hydraulic shut-off valve converts the vertical movement of the floating element 4 into the horizontal movement of the valve core 2 by setting the first protrusion 31 and the second protrusion 32 of the reversing rod 3. It can only perform the opening or closing action when the liquid level reaches the preset height, avoiding the flutter phenomenon of frequent opening and closing due to instantaneous changes in liquid level. It has a delay effect, strong anti-interference ability, and high reliability.

[0046] Furthermore, referring to Figure 2 and Figure 4 Along the axial direction of the reversing rod 3, the first protrusion 31 and the second protrusion 32 are spaced apart, and along the circumferential direction of the reversing rod 3, the first protrusion 31 and the second protrusion 32 are spaced apart.

[0047] The reversing rod 3 has a first protrusion 31 and a second protrusion 32. Both protrusions 31 and 32 are integrally formed with the reversing rod 3 through casting, stamping, or other methods, ensuring the connection stability between the protrusions 31 and 32 and the reversing rod 3, and extending its service life. The first protrusion 31 and 32 are staggered vertically on both sides of the reversing rod 3, and are centrally symmetrical about the center of symmetry of the reversing rod 3. The distance between the first protrusion 31 and 32 and the reversing rod 3 determines the height difference between the high and low liquid levels and the delay time for opening and closing.

[0048] Specifically, the larger the distance between the first protrusion 31 and the second protrusion 32, the greater the height difference of the liquid level, and the longer the opening and closing switching time of the valve body 1, and vice versa. By setting the first protrusion 31 and the second protrusion 32 on the reversing rod 3, the vertical movement of the floating element 4 is converted into the horizontal movement of the valve core 2. The opening or closing action can only be performed when the liquid level reaches the preset height. When the liquid level fluctuates between the preset maximum and minimum heights, the valve body 1 remains in the open or closed state, and fluctuations in the liquid level do not affect the state of the valve body 1. This avoids the chattering phenomenon caused by frequent opening and closing due to instantaneous changes in liquid level, has a delay effect, strong anti-interference ability, and high reliability.

[0049] Furthermore, referring to Figure 2 and Figure 4 The floating assembly also includes a stop 5, which is located at the other end of the reversing rod 3 away from the floating assembly 4. The valve body 1 has a first limiting end face 15, and one end of the second sliding channel 12 is open to the first limiting end face 15. The stop 5 can abut against the first limiting end face 15.

[0050] Stop bolts are special fasteners used in mechanical systems to achieve precise limiting, positioning, and buffering functions. Their core function is to limit the stroke or position of moving parts through physical obstruction, rather than primarily serving a connecting function like ordinary bolts. They have distinctive structural design features; for example, the bolt head is often machined into a spherical shape and hardened to maintain high wear resistance during frequent impacts; or a non-metallic stop made of polyurethane, silicone rubber, or other materials is added to the front end to absorb impact energy, mitigate metal-on-metal collision noise, and protect the workpiece surface. In practical applications, stop bolts are usually used in conjunction with lock nuts. By adjusting the bolt's screw-in depth, the limiting position can be precisely set; once adjusted, tightening the nut prevents loosening. Due to their reliable positioning and buffering performance, stop bolts are widely used in applications requiring high positional accuracy and safety, such as stroke limiting in automated equipment, workpiece positioning and clamping, maximum angle control in automotive steering systems, and preventing the dislodgement of critical pins in railway locomotives and rolling stock.

[0051] The stop 5 is set as a stop bolt. The stop 5 is installed at one end of the reversing rod 3 near the second protrusion 32. The top of the valve body 1 has a first limiting end face 15. The stop 5 can abut against the first limiting end face 15 near the opening of the second sliding channel 12 to prevent the reversing rod 3 from disengaging from the valve body 1 when the liquid level is too low. The stop 5 plays a limiting role.

[0052] Furthermore, referring to Figures 1-5 When valve body 1 is in the open state, the second protrusion 32 is located inside the through hole 22, and the stop 5 abuts against the first limiting end face 15. The distance between the stop 5 and the second protrusion 32 is equal to the length of the second sliding channel 12 above the valve core 2. When the liquid level drops to the preset minimum height, the floating member 4 drives the reversing rod 3 to slide down along the second sliding channel 12 and the through hole 22. The second protrusion 32 slides inside the through hole 22, valve body 1 opens, and the stop 5 just abuts against the first limiting end face 15. Since there may be a certain delay in replenishing water into the water tank, the liquid level will continue to drop. Under the limiting action of the stop 5, the reversing rod 3 is prevented from falling off.

[0053] Furthermore, referring to Figure 2 and Figure 4 The floating assembly also includes a limiting member 6, which is disposed on the reversing rod 3. The valve body 1 also has a second limiting end face 16. The other end of the second sliding channel 12 opens through to the second limiting end face 16, and the limiting member 6 can abut against the second limiting end face 16.

[0054] Stop washers are precision functional components widely used in mechanical assembly. Their core function is to provide rigid support and limitation between fasteners and connected parts, preventing excessive compression or displacement deformation of parts by precisely controlling the tightening torque and preload. They are typically made of materials with high compressive strength and good wear resistance, such as hardened steel, stainless steel, or engineering plastics. The surface is often treated with phosphate or galvanizing for rust prevention to meet corrosion resistance requirements under different working conditions.

[0055] The limiting member 6 is provided with a stop gasket. The reversing rod 3 has a stop gasket protruding from the outer periphery near the first protrusion 31. The stop gasket is integrally formed with the reversing rod 3. The bottom end of the valve body 1 has a second limiting end face 16. The limiting member 6 can abut against the second limiting end face 16 near the other opening of the second sliding channel 12 to prevent the reversing rod 3 from rising excessively.

[0056] Furthermore, referring to Figures 1-5When valve body 1 is in the closed state, the first protrusion 31 is located inside the through hole 22, and the limiting member 6 abuts against the second limiting end face 16. The distance between the limiting member 6 and the first protrusion 31 is equal to the length of the second sliding channel 12 below the valve core 2. When the liquid level rises to the preset maximum height, the floating member 4 drives the reversing rod 3 to slide upward along the second sliding channel 12 and the through hole 22. The first protrusion 31 slides inside the through hole 22, valve body 1 is closed, and the limiting member 6 just abuts against the second limiting end face 16. Since there may be a certain delay in the drainage of the water tank, the liquid level will continue to rise. Under the limiting action of the limiting member 6, the reversing rod 3 is prevented from rising excessively.

[0057] Furthermore, referring to Figures 2-5 The hydraulic shut-off valve also includes a first fixing member 7, the valve body 1 is also provided with a first connecting hole, the reversing rod 3 is provided with a first guide hole 33, the first guide hole 33 extends along the axial direction of the reversing rod 3, one end of the first fixing member 7 is connected to the first connecting hole, and the other end of the first fixing member 7 passes through the first guide hole 33 and can slide along the extension direction of the first guide hole 33.

[0058] The first fixing member 7 is set as a guide pin. The first connecting hole of the valve body 1 corresponds to the first guide hole 33 of the reversing rod 3. The first fixing member 7 passes through the first connecting hole and is slidably connected to the first guide hole 33. During the process of the reversing rod 3 sliding up and down relative to the valve body 1 along its axial direction, the first fixing member 7 and the first guide hole 33 slide together to play a circumferential limiting role and prevent the reversing rod 3 from rotating relative to the valve body 1.

[0059] Furthermore, referring to Figures 2-5 The hydraulic shut-off valve also includes a second fixing member 8, the valve body 1 is also provided with a second connecting hole, the valve core 2 is also provided with a second guide hole 23, the second guide hole 23 extends along the sliding direction of the valve core 2, one end of the second fixing member 8 is connected to the second connecting hole, and the other end of the second fixing member 8 passes through the second guide hole 23 and can slide along the extending direction of the second guide hole 23.

[0060] The second fixing member 8 is set as a guide pin. The second connecting hole of the valve body 1 corresponds to the second guide hole 23 of the valve core 2. The second fixing member 8 passes through the second connecting hole and is slidably connected to the second guide hole 23. During the process of the valve core 2 sliding left and right relative to the valve body 1 in the first sliding channel 11, the second fixing member 8 slides with the second guide hole 23 to prevent the valve core 2 from rotating relative to the valve body 1.

[0061] Furthermore, referring to Figure 2 and Figure 4The first protrusion 31 is provided with a first guide surface 311, which is used to guide the first protrusion 31 into the through hole 22. When the valve body 1 switches from the open state to the closed state, the first guide surface 311 has a force applied to the valve core 2, so that the first protrusion 31 can push the valve core 2.

[0062] The first protrusion 31 is configured as a wedge, and the end face of the first protrusion 31 near the inner wall of the through hole 22 is configured as a first guide surface 311. As the liquid level rises, the floating component 4 rises synchronously with the liquid level and drives the reversing rod 3 to slide upward along the second sliding channel 12 and the through hole 22. The second protrusion 32 gradually slides out of the through hole 22, while the first protrusion 31 sequentially enters the second sliding channel 12 and the through hole 22. The first guide surface 311 contacts the connection between the lower end face of the valve core 2 and the inner wall of the through hole 22. As the liquid level continues to rise, the first guide surface 311 guides the first protrusion 31 into the through hole 22 until the first protrusion 31 slides into the through hole 22. The first protrusion 31 applies a force to the valve core 2, pushing the valve core 2 to the right side relative to the valve body 1, disconnecting the inlet end 13 and the outlet end 14, thus realizing the closing action of the valve body 1. The first guide surface 311 has a force-enhancing effect, which enables the buoyancy of the smaller floating part 4 to overcome the larger fluid pressure to drive the valve core 2, thereby improving the sealing performance and applicability of the hydraulic shut-off valve.

[0063] Furthermore, referring to Figure 2 and Figure 4 The second protrusion 32 is provided with a second guide surface 321, which is used to guide the second protrusion 32 into the through hole 22. When the valve body 1 switches from the closed state to the open state, the second guide surface 321 has a force applied to the valve core 2, so that the second protrusion 32 can push the valve core 2.

[0064] The second protrusion 32 is configured as a wedge, and the end face of the second protrusion 32 near the inner wall of the through hole 22 is configured as a second guide surface 321. As the liquid level decreases, the floating component 4 descends synchronously with the liquid level and drives the reversing rod 3 to slide down along the second sliding channel 12 and the through hole 22. The first protrusion 31 gradually slides out of the through hole 22, while the second protrusion 32 sequentially enters the second sliding channel 12 and the through hole 22. The second guide surface 321 contacts the connection between the upper end face of the valve core 2 and the inner wall of the through hole 22. As the liquid level continues to decrease, the second guide surface 321 guides the second protrusion 32 into the through hole 22 until the second protrusion 32 slides into the through hole 22. The second protrusion 32 applies a force to the valve core 2, pushing the valve core 2 to the left side relative to the valve body 1. The inlet end 13 and the outlet end 14 are connected through the annular groove 21, realizing the opening action of the valve body 1. The second guide surface 321 has a force-enhancing effect, which enables the buoyancy of the smaller floating part 4 to overcome the larger fluid pressure to drive the valve core 2, thereby improving the sealing performance and applicability of the hydraulic shut-off valve.

[0065] Optionally, the first protrusion 31 and the second protrusion 32 of the wedge-shaped structure can be replaced with a cam curve groove structure, the reversing rod 3 has an inclined groove, and a pin is set on the valve core 2. The vertical buoyancy is converted into horizontal thrust by driving the pin through the inclined groove. Optionally, in addition to adjusting the delay opening and closing switching time by adjusting the distance between the first protrusion 31 and the second protrusion 32, a combination structure of spring and airbag can also be used, which can also play a role in buffering and delaying.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A hydraulically controlled shut-off valve, characterized in that, include: The valve body (1) has a first sliding channel (11) and a second sliding channel (12) that are intersected and connected. The valve body (1) has an inlet end (13) and an outlet end (14). The valve core (2) is slidably disposed in the first sliding channel (11). The valve core (2) has an annular groove (21) and a through hole (22). The through hole (22) is connected to the second sliding channel (12). The floating assembly includes a reversing rod (3) and a floating component (4). The floating component (4) is disposed at the end of the reversing rod (3). The reversing rod (3) is provided with a first protrusion (31) and a second protrusion (32). The reversing rod (3) can slide through the second sliding channel (12) and the through hole (22) to make the valve body (1) be in an open state and a closed state. When the valve body (1) is in a closed state, the first protrusion (31) is located in the through hole (22) and pushes the valve core (2), so that the inlet end (13) and the outlet end (14) are both disconnected from the annular groove (21). When the valve body (1) is in an open state, the second protrusion (32) is located in the through hole (22) and pushes the valve core (2) in the opposite direction, so that the inlet end (13) and the outlet end (14) are both connected to the annular groove (21).

2. The hydraulically controlled shut-off valve according to claim 1, characterized in that, Along the axial direction of the reversing rod (3), the first protrusion (31) and the second protrusion (32) are spaced apart, and along the circumferential direction of the reversing rod (3), the first protrusion (31) and the second protrusion (32) are spaced apart.

3. The hydraulically controlled shut-off valve according to claim 1, characterized in that, The floating assembly also includes a stop (5), which is disposed at the other end of the reversing rod (3) away from the floating assembly (4). The valve body (1) has a first limiting end face (15), and one end of the second sliding channel (12) is open to the first limiting end face (15). The stop (5) can abut against the first limiting end face (15).

4. The hydraulically controlled shut-off valve according to claim 3, characterized in that, When the valve body (1) is in the open state, the second protrusion (32) is located in the through hole (22), and the stop (5) abuts against the first limiting end face (15).

5. The hydraulically controlled shut-off valve according to claim 1, characterized in that, The floating assembly also includes a limiting member (6), which is disposed on the reversing rod (3). The valve body (1) also has a second limiting end face (16). The other end of the second sliding channel (12) opens through to the second limiting end face (16), and the limiting member (6) can abut against the second limiting end face (16).

6. The hydraulically controlled shut-off valve according to claim 5, characterized in that, When the valve body (1) is in the closed state, the first protrusion (31) is located in the through hole (22), and the limiting member (6) abuts against the second limiting end face (16).

7. The hydraulically controlled shut-off valve according to claim 1, characterized in that, It also includes a first fixing member (7), the valve body (1) is provided with a first connecting hole, the reversing rod (3) is provided with a first guide hole (33), the first guide hole (33) extends along the axial direction of the reversing rod (3), one end of the first fixing member (7) is connected to the first connecting hole, and the other end of the first fixing member (7) passes through the first guide hole (33) and can slide along the extension direction of the first guide hole (33).

8. The hydraulically controlled shut-off valve according to claim 1, characterized in that, It also includes a second fixing member (8), the valve body (1) is also provided with a second connecting hole, the valve core (2) is also provided with a second guide hole (23), the second guide hole (23) extends along the sliding direction of the valve core (2), one end of the second fixing member (8) is connected to the second connecting hole, and the other end of the second fixing member (8) passes through the second guide hole (23) and can slide along the extending direction of the second guide hole (23).

9. The hydraulically controlled shut-off valve according to claim 1, characterized in that, The first protrusion (31) is provided with a first guide surface (311). The first guide surface (311) is used to guide the first protrusion (31) into the through hole (22). When the valve body (1) switches from the open state to the closed state, the first guide surface (311) has a force applied to the valve core (2), so that the first protrusion (31) can push the valve core (2).

10. The hydraulically controlled shut-off valve according to claim 1, characterized in that, The second protrusion (32) is provided with a second guide surface (321). The second guide surface (321) is used to guide the second protrusion (32) into the through hole (22). When the valve body (1) switches from the closed state to the open state, the second guide surface (321) has a force applied to the valve core (2), so that the second protrusion (32) can push the valve core (2).

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