Double acting stop valve

Abstract

The application relates to the technical field of valves, and discloses a double-operation stop valve which comprises a valve body, a sliding cavity vertically formed in the valve body, a shell fixedly installed above the valve body, a valve rod elastically and slidingly inserted into the sliding cavity, a top of the valve rod extending into the shell, a bottom of the valve rod provided with a valve flap, a push block slidingly arranged in the shell and abutting against the top of the valve rod, and an upper handle rotationally arranged above the shell and in transmission connection with the push block through a first transmission mechanism. In the application, the side handle is located on the front side of the valve body, so that the side handle is located on the outside of the space where the valve body is located and is not limited by the space where the valve body is located; even if the valve body is installed at a position with a narrow height space, when the hand holds the side handle, the hand can be freely rotated without being hindered by the upper obstacles, so that the hand is not scratched.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and specifically to a dual-operation shut-off valve. Background Technology

[0002] Valves are control components in fluid transport systems, possessing functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, and pressure relief. Shut-off valves include gate valves, globe valves, plug valves, ball valves, and butterfly valves. Among these, globe valves are widely popular due to their low friction between the sealing surfaces during opening and closing, durability, small opening height, ease of manufacture, and convenient maintenance. They are suitable for both low and medium pressures as well as high pressures. A globe valve relies on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, thus preventing the flow of media.

[0003] For example, Chinese invention patent application number CN201910709410.6, publication number CN110332317B, entitled "A Gate Valve," discloses a valve body, valve cover, valve disc, valve stem, pull rod, handle, spring, sealing assembly, and adjusting assembly. The sealing assembly is located in the inlet flow channel. When the valve stem is in the lower position, the sealing assembly cooperates with the lower end face of the valve stem to open the stop hole. When the valve stem is in the upper position, the sealing assembly closes the stop hole. The adjusting assembly is connected to the upper end of the valve cover to control the up and down movement of the valve disc. By manually rotating the second handle, the rotating sleeve is rotated, causing the valve disc to move downwards and its lower end face to abut against the upper end face of the valve seat, thus closing the valve; conversely, the valve is opened. Furthermore, rotating the first handle can drive the left and right scrapers to rotate, thus cleaning the valve disc and valve seat.

[0004] Regarding the shut-off valve provided in the aforementioned invention patent and various shut-off valves used in the prior art, the applicant has discovered at least the following defects during actual use:

[0005] Since the gate valve is opened and closed by a specific handle, and the handle is usually located above the valve body, when the gate valve is installed in a position with limited vertical space, the space above the handle will be small. When the handle is gripped and turned with one hand, the hand is likely to come into contact with the overhead obstruction and get scratched. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-operation shut-off valve to overcome the aforementioned shortcomings of the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dual-operation shut-off valve, comprising:

[0008] The valve body has a sliding cavity perpendicular to the valve body inside;

[0009] The housing is fixedly installed above the valve body;

[0010] The valve stem is elastically slidably inserted into the sliding cavity, the top of the valve stem extends into the housing, and the bottom of the valve stem is provided with a valve disc.

[0011] The push block is slidably disposed within the housing and abuts against the top of the valve stem;

[0012] The upper handle is rotatably mounted above the housing and is connected to the push block via a first transmission mechanism. Rotating the upper handle drives the first transmission mechanism to push the push block downward to squeeze the valve stem so that the valve disc closes the valve body.

[0013] A side handle is rotatably mounted on the front side of the housing and is connected to the push block via a second transmission mechanism. Rotating the side handle drives the second transmission mechanism to push the push block downward to squeeze the valve stem so that the valve disc closes the valve body.

[0014] In the aforementioned dual-operation shut-off valve, a flange ring coaxially arranged with the valve disc is fixed inside the sliding cavity. The valve disc abuts against the top opening of the flange ring to allow the sliding cavity to be open or closed.

[0015] The aforementioned dual-operation shut-off valve has a first transmission mechanism comprising a first threaded rod fixedly disposed below the upper handle and a force-applying block slidably disposed in the housing. The bottom of the force-applying block abuts against the top of the push block. The first threaded rod passes through the top of the housing and is threadedly inserted into the force-applying block. Rotating the upper handle drives the first threaded rod to rotate synchronously, causing the force-applying block to slide downwards or upwards.

[0016] The aforementioned dual-operation shut-off valve has a cover fixedly mounted on the housing, a first stepped ring fixedly mounted on the cover, an inverted "T"-shaped limiting plate rotatably mounted between the first stepped ring and the cover, the top of the limiting plate passing through the first stepped ring and being fixedly connected to the bottom of the upper handle, and the bottom of the limiting plate being fixedly connected to the top of the first threaded rod.

[0017] The aforementioned dual-operation shut-off valve includes a second transmission mechanism comprising a second threaded rod rotatably inserted into the side of the housing and a transmission gear rotatably disposed within the housing. One end of the second threaded rod is located outside the housing and fixedly connected to a side handle, while the other end is located inside the housing. A toothed plate, which is slidably connected to the inner cavity of the housing, is threaded onto the second threaded rod located inside the housing. The toothed plate meshes with the transmission gear. Vertical teeth that mesh with the transmission gear are fixedly disposed on the push block.

[0018] In the aforementioned dual-operation shut-off valve, a second stepped ring is fixedly provided on the outer side of the housing, and a limiting disk is rotatably provided between the second stepped ring and the outer side of the housing. The limiting disk is fixedly sleeved on the second threaded rod.

[0019] In the aforementioned dual-operation shut-off valve, a fixed plate is fixedly installed inside the housing, and one end of the second threaded rod located inside the housing is rotatably connected to the fixed plate.

[0020] In the aforementioned dual-operation shut-off valve, an upper baffle is fixedly provided at the top of the valve stem, and a first compression spring is provided between the bottom of the upper baffle and the inner wall of the housing. When the valve body is closed, the first compression spring is in a compressed state.

[0021] In the aforementioned dual-operation shut-off valve, a lower baffle is fixedly installed at the bottom of the valve stem, and a guide hole penetrating the lower baffle is opened at the bottom of the valve stem. A guide rod is fixedly installed on the valve disc, and the guide rod is elastically slidably inserted into the guide hole.

[0022] In the aforementioned dual-operation shut-off valve, a connecting pipe is sealed to the opening of the sliding cavity, a bellows is installed in the connecting pipe, the valve stem passes through the bellows, and a sliding plate is fixed on the valve stem and slides against the inner wall of the connecting pipe. The bellows is pressed into the space formed by the inner wall of the connecting pipe and the top surface of the sliding plate.

[0023] Beneficial Effects: In the above technical solution, the present invention provides a dual-operation shut-off valve. By setting an upper handle located above the valve body and a side handle located on the front side of the valve body, the side handle protrudes from the space where the valve body is located when the shut-off valve is installed. Rotating the upper handle and rotating the side handle can control the closing and opening of the valve disc. When the shut-off valve is installed in a position with limited vertical space, the upper handle can be kept stationary, and only the side handle needs to be rotated. Under the action of the second transmission mechanism, the push block is driven to press the valve stem downward, thereby closing the valve body. When the side handle is rotated in the opposite direction, the second transmission mechanism drives the push block to slide upward, thereby driving the valve stem and valve disc to move upward, so that the valve body opens. Compared with the prior art, since the side handle is located on the front side of the valve body, the side handle is located outside the space where the valve body is located and is not restricted by the space where the valve body is located. Even if the valve body is installed in a position with limited vertical space, when the hand grasps the side handle, it can rotate freely without being obstructed by overhead obstacles, thus preventing hand abrasions. This effectively solves the shortcomings of the prior art. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a front sectional view of the dual-operation shut-off valve provided in an embodiment of the present invention;

[0026] Figure 2This is a schematic diagram of the left cross-sectional structure of the dual-operation shut-off valve provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the connection structure between the upper handle, the limiting plate, the first stepped ring, and the cover provided in an embodiment of the present invention;

[0028] Figure 4 Provided for embodiments of the present invention Figure 1 A magnified structural diagram of part A in the diagram;

[0029] Figure 5 Provided for embodiments of the present invention Figure 2 A magnified structural diagram of part B in the diagram.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Housing; 2. Valve body; 201. Inlet channel; 202. Outlet channel; 203. Slide cavity; 204. Flange ring; 3. Force-applying block; 301. Threaded hole; 4. First threaded rod; 5. Bearing; 6. Cover; 7. First stepped ring; 8. Limiting plate; 9. Upper handle; 10. First ball bearing; 11. Valve stem; 1101. Lower baffle; 1102. Slide plate; 1103. Upper baffle; 11 04. Guide hole; 12. Push block; 1201. Vertical toothed rack; 13. First compression spring; 14. Bellows; 15. Connecting pipe; 16. Guide rod; 17. Cylinder; 18. Second compression spring; 19. Valve disc; 20. Transmission gear; 21. Tooth plate; 2101. Horizontal toothed rack; 22. Second threaded rod; 23. Side handle; 24. Second stepped ring; 25. Limiting plate; 26. Second ball bearing. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-5 As shown, an embodiment of the present invention provides a dual-operation shut-off valve, comprising:

[0034] The valve body 2 has a sliding cavity 203 perpendicular to the valve body 2 inside;

[0035] Housing 1 is fixedly installed above valve body 2;

[0036] The valve stem 11 is elastically slidably inserted into the slide cavity 203, the top of the valve stem 11 extends into the housing 1, and the bottom of the valve stem 11 is provided with a valve disc 19.

[0037] Push block 12 is slidably disposed inside housing 1 and abuts against the top of valve stem 11;

[0038] The upper handle 9 is rotatably positioned above the housing 1 and is connected to the push block 12 via the first transmission mechanism. Rotating the upper handle 9 drives the first transmission mechanism to push the push block 12 downward to squeeze the valve stem 11 so that the valve disc 19 closes the valve body 2.

[0039] The side handle 23 is rotatably mounted on the front side of the housing 1 and is connected to the push block 12 via the second transmission mechanism. Rotating the side handle 23 drives the second transmission mechanism to push the push block 12 downward to press the valve stem 11 so that the valve disc 19 closes the valve body 2.

[0040] This embodiment provides a dual-operation shut-off valve capable of closing and opening the valve body in the vertical direction and in the parallel direction, respectively. In this embodiment, terms related to direction and position, such as "up," "down," "left," "right," "front," and "back," are relative to the accompanying drawings. Specifically, see the attached drawing. Figure 1 and 4 As shown, the valve body 2 has an inlet channel 201 on the left and an outlet channel 202 on the right. A sliding cavity 203 is located between and connected to the inlet and outlet channels 201 and 202. A valve disc 19 is located in the sliding cavity 203 to block it. When the valve disc 19 slides downwards, it blocks the sliding cavity 203, thus closing the valve body 2. At this time, the inlet and outlet channels 201 are not connected. When the valve disc 19 slides upwards, it opens the sliding cavity 203, thus opening the valve body 2. At this time, the inlet and outlet channels 201 are connected. The housing 1 is fixed relative to the valve body 2. The upper handle 9 is located above the housing 1 and also above the valve body 2. The side handle 23 is located at the front of the housing 1 and also at the front of the valve body 2 so that when the shut-off valve is installed, the side handle 23 protrudes from the space where the valve body 2 is located, and is not restricted by the space where the valve body 2 is located (due to the attached...). Figure 1 This is a sectional view, attached. Figure 1 The side handle 23 is not shown in the image; please refer to the attached image from another perspective. Figure 2 and 5 In the appendix Figure 2 and 5The middle handle 23 is located on the left side of the housing, and the height of the side handle 23 is lower than the height of the upper handle 9. The valve disc 19 is located at the bottom of the valve stem 11, so that the up and down movement of the valve disc 19 is controlled by the valve stem 11. The valve stem 11 is elastically slidably inserted into the slide cavity 203 in the vertical direction. The valve stem 11 is slidably inserted into the housing 1. The top of the valve body 11 is located in the inner cavity of the housing 1, and the bottom is located in the slide cavity 203 so that the valve disc 19 is also located in the slide cavity 203. When the valve stem 11 is subjected to a downward thrust and slides down, it will drive the valve disc 19 to move down to close the valve body 2. During the downward movement of the valve stem 11, it will be elastically compressed. So when the downward thrust on the valve stem 11 disappears, the valve stem 11 will slide up under the action of the compression elastic force and automatically reset, thereby driving the valve disc 19 to move up and open the valve body 2. The push block 12 is slidably disposed in the housing 1 in the vertical direction. Guide plates (not shown in the figure) are fixed on the left and right sides of the push block 12. Guide grooves (not shown in the figure) are slidably connected to the guide plates on the inner wall of the housing 1 to enable the push block 12 to slide smoothly in the vertical direction. The bottom of the push block 12 abuts against the top of the valve stem 11. The downward thrust on the valve stem 11 is provided by the push block 12. The power on the push block 12 is provided by the first transmission mechanism or the second transmission mechanism. The power of the first transmission mechanism is provided by the rotational power of the upper handle 9 when the upper handle 9 is rotated. The power of the second transmission mechanism is provided by the rotational power of the side handle 23 when the side handle 23 is rotated. That is, the valve disc 19 can be moved up and down regardless of whether the upper handle 9 or the side handle 23 is rotated, thereby realizing the opening and closing of the valve body 2. For example, when the upper handle 9 is turned clockwise, the rotational force of the upper handle 9 generates a downward pushing force on the push block 12 through the first transmission mechanism, pushing the valve stem 11 downward elastically, thereby causing the valve disc 19 to move downward and close the valve body 2. When the upper handle 9 is turned counterclockwise, the downward pushing force of the first transmission mechanism on the push block 12 is gradually removed. At this time, under the action of elasticity, the valve body 11 moves upward, thereby causing the valve disc 19 to move upward and open the valve body 2. When the upper handle 9 is not easy to be turned with one hand due to the limitation of height space, the upper handle 9 can be kept still, and the side handle 2 can be turned. 3. When the side handle 23 is turned clockwise, the rotational force of the side handle 23 generates a downward force on the push block 12 through the second transmission mechanism, causing the push block 12 to push the valve stem 11 downward so that the valve stem 11 slides downward elastically, thereby causing the valve disc 19 to move downward and close the valve body 2. When the side handle 23 is turned counterclockwise, the rotational force of the side handle 23 generates an upward force on the push block 12 through the second transmission mechanism, causing the push block 12 to move upward so that the valve stem 11 also moves upward under the action of elastic force, thereby causing the valve disc 19 to move upward and open the valve body 2. It can be seen that the valve body 2 can be closed and opened from both the top and the front of the valve body 2. Even if the gate valve is installed in a position with limited height space, the opening and closing of the valve body 2 can be controlled by turning the side handle 23 located on the front of the valve body 2.In existing systems, since the opening and closing of the shut-off valve are controlled by a specific handle, and this handle is generally located above the valve body, when the shut-off valve is installed in a location with limited vertical space, the space above the handle will be small. When the handle is gripped and turned with one hand, it is easy for the hand to come into contact with the overhead obstruction and get scratched.

[0041] In this embodiment, by setting an upper handle 9 above the valve body 2 and a side handle 23 on the front side of the valve body 2, when the shut-off valve is installed, the side handle 23 protrudes out of the space where the valve body 2 is located. Rotating the upper handle 9 and rotating the side handle 23 can control the closing and opening of the valve disc 19. When the shut-off valve is installed in a position with limited height space, the upper handle 9 can be kept still. Only by rotating the side handle 23, the push block 12 is driven to press the valve stem 11 downward under the action of the second transmission mechanism, thereby causing the valve body 19 to close the valve body 2. When the side handle 23 is rotated in the opposite direction, the second transmission mechanism drives the push block 12 to slide upward, thereby driving the valve stem 11 and the valve disc 19 to move upward, so that the valve body 2 is opened. Compared with the prior art, since the side handle 23 is located on the front side of the valve body 2, the side handle 23 is located on the outside of the space where the valve body 2 is located, and is not restricted by the space where the valve body 2 is located. Even if the valve body 2 is installed in a position with limited height space, when the hand grasps the side handle 23, the hand can rotate freely without being obstructed by obstacles above, and thus there will be no hand abrasions. This can effectively solve the shortcomings of the prior art.

[0042] In this embodiment, a flange ring 204 coaxially arranged with the valve disc 19 is fixed inside the sliding cavity 203. The valve disc 19 and the top opening of the flange ring 204 abut against each other to make the sliding cavity 203 open or closed. Specifically, valve disc 19 is a frustum-shaped disc, larger at the top and smaller at the bottom. The diameter of the top surface of valve disc 19 is larger than the inner diameter of flange ring 204, and the diameter of the bottom surface of valve disc 19 is smaller than the inner diameter of flange ring 204. Valve disc 19 and flange ring 204 are coaxial. When valve disc 19 moves downward, it gradually inserts into flange ring 204 until the outer surface of valve disc 19 abuts against the top opening of flange ring 204, so that valve disc 19 blocks the top opening of flange ring 204. At this time, sliding cavity 203 is blocked, thus valve body 2 is closed. When valve disc 19 moves upward, valve disc 19 gradually moves away from flange ring 204, so that the top opening of flange ring 204 is opened. At this time, sliding cavity 203 is open, thus valve body 2 is opened, and fluid flows into outlet channel 202 through inlet channel 201 and sliding cavity 203 in sequence.

[0043] In this embodiment, the first transmission mechanism includes a first threaded rod 4 fixedly disposed below the upper handle 9 and a force-applying block 3 slidably disposed in the housing 1 in the vertical direction. Guide plates (not shown in the figure) that are slidably connected to guide grooves are also fixedly installed on the left and right sides of the force-applying block 3 to ensure that the force-applying block 3 can slide smoothly in the vertical direction without rotating. The bottom of the force-applying block 3 abuts against the top of the push block 12. The first threaded rod 4 passes through the top of the housing 1 and is threadedly inserted into the force-applying block 3. A threaded hole 301 is provided on the top of the force-applying block 3. The thread of the first threaded rod 4 is disposed in the lower half of the first threaded rod 4, and the upper half of the first threaded rod 4 is a smooth cylinder. The first threaded rod 4 is rotatably connected to the housing 1, and a bearing 5 is provided between the first threaded rod 4 and the inner wall of the housing 1 so that the first threaded rod 4 can rotate smoothly. The first threaded rod 4 can only rotate on its own axis and cannot move up and down. The lower half of the first threaded rod 4 is screwed into the threaded hole 301. Since the force-applying block 3 does not rotate on its own axis, rotating the upper handle 9 drives the first threaded rod 4 to rotate synchronously so that the force-applying block 3 slides down or up. Specifically, when the upper handle 9 is rotated clockwise, the upper handle 9 drives the first threaded rod 4 to rotate clockwise synchronously. At this time, the force-applying block 3 slides down, thereby pushing the push block 12 down. The push block 12 then pushes the valve stem 11 down, thereby driving the valve disc 19 to move down to block the slide cavity 203. Because the valve stem 11 stores elastic force during its downward movement, when the upper handle 9 is turned counterclockwise, the upper handle 9 drives the first threaded rod 4 to rotate counterclockwise synchronously. At this time, the force block 3 slides upward, and under the action of elastic force, the valve stem 11 also slides upward, thereby driving the valve disc 19 away from the slide cavity 203 so that the slide cavity 203 is open.

[0044] In this embodiment, a cover 6 is fixedly mounted on the housing 1. The cover 6 is connected to the housing 1 by screws or snap-fit, which will not be described in detail. See attached figure. Figure 3 As shown, a first stepped ring 7 is fixedly mounted on the cover 6. An inverted "T"-shaped limiting plate 8 is rotatably mounted between the first stepped ring 7 and the cover 6, ensuring that the limiting plate 8 will not detach while rotating between the first stepped ring 7 and the cover 6. The outer circumference of the limiting plate 8 is circular. The top of the limiting plate 8 passes through the first stepped ring 7 and is fixedly connected to the bottom of the upper handle 9. The bottom of the limiting plate 8 is fixedly connected to the top of the first threaded rod 4. The rotation of the limiting plate 8 between the first stepped ring 7 and the cover 6 improves the stability of the first threaded rod 4 during rotation, and the limiting plate 8 will not detach from the first stepped ring 7 and the cover 6, preventing the first threaded rod 4 from moving in the vertical direction. This ensures that the first threaded rod 4 can drive the force-applying block 3 to move smoothly in the vertical direction when rotating.

[0045] Furthermore, several first balls 10 are rolledly embedded in the top and bottom surfaces of the limiting plate 8. The several first balls 10 located on the top surface of the limiting plate 8 abut against the inner wall of the first stepped ring 7, and the several first balls 10 located on the bottom surface of the limiting plate 8 abut against the top surface of the cover 6. By using the arrangement of several first balls 10, the friction force experienced by the limiting plate 8 when rotating can be greatly reduced, thereby improving the smoothness of the limiting plate 8 when rotating.

[0046] In this embodiment, as shown in the appendix Figure 2 and 5 As shown, the second transmission mechanism includes a second threaded rod 22 rotatably inserted into the side of the housing 1 and a transmission gear 20 rotatably disposed in the housing 1. One end of the second threaded rod 22 is located outside the housing 1 and fixedly connected to the side handle 23, while the other end is located inside the housing 1. A toothed plate 21, which is slidably connected to the inner cavity of the housing 1, is threaded onto the second threaded rod 22 located inside the housing 1. The toothed plate 21 can only slide left and right in the horizontal direction. Horizontal guide plates (not shown in the figure) are fixedly installed on the front and rear sides of the toothed plate 21. Two horizontal guide grooves, corresponding one-to-one with the two horizontal guide plates, are opened on the inner wall of the housing 1. The horizontal guide plates slide within the horizontal guide grooves so that the toothed plate 21 can only slide horizontally, and the second threaded rod 22 can only rotate and cannot move horizontally. When the side handle 23 is rotated clockwise, it drives the second threaded rod 22 to rotate clockwise. At this time, the second threaded rod 22 drives the toothed plate 21 to slide horizontally to the right. Similarly, when the side handle 23 is rotated counterclockwise... At time 3, the second threaded rod 22 rotates counterclockwise, causing the toothed plate 21 to slide horizontally to the left. The horizontal teeth 2101 on the toothed plate 21 are fixed at the bottom of the toothed plate 21, and the transmission gear 20 is located below the toothed plate 21. The horizontal teeth 2101 mesh with the transmission gear 20 to make the toothed plate 21 mesh with the transmission gear 20. When the toothed plate 21 slides to the right, it drives the transmission gear 20 to rotate clockwise, and vice versa. When the transmission gear 20 rotates clockwise, the push block 12 is fixed with vertical teeth 1201 that mesh with the transmission gear 20. When the transmission gear 20 rotates clockwise, the push block 12 moves downward through the vertical teeth 1201, thereby pushing the valve stem 11 and valve disc 19 downward until the valve body 2 is closed. When the transmission gear 20 rotates counterclockwise, the push block 12 moves upward through the vertical teeth 1201, thereby causing the valve stem 11 to move upward under the action of elastic force, thereby causing the valve disc 19 to move upward and opening the valve body 2.

[0047] In this embodiment, a second stepped ring 24 is fixedly provided on the outer side of the housing 1. A limiting disk 25 is rotatably provided between the second stepped ring 24 and the outer side of the housing 1. The limiting disk 25 is fixedly sleeved on the second threaded rod 22. Several second balls 26 are rolledly embedded on both the left and right sides of the limiting disk 25. Several second balls 26 located on the left side of the limiting disk 25 abut against the inner wall of the second stepped ring 24, and several second balls 26 located on the right side of the limiting disk 25 abut against the left side of the housing 1. This allows the limiting disk 25 to rotate smoothly without disengaging from the second stepped ring 24 and the outer side of the housing 1, thereby preventing the second threaded rod 22 from undergoing horizontal displacement, so that the second threaded rod 22 can only rotate.

[0048] In this embodiment, a fixing plate 101 is fixedly provided inside the housing 1, and one end of the second threaded rod 22 located inside the housing 1 is rotatably connected to the fixing plate 101 to improve the stability of the second threaded rod 22 when rotating.

[0049] In this embodiment, an upper baffle 1103 is fixedly provided on the top of the valve stem 11. The periphery of the upper baffle 1103 protrudes from the valve stem 11. A first compression spring 13 is provided between the bottom of the upper baffle 1103 and the inner wall of the housing 1. One end of the first compression spring 13 is fixedly connected to the bottom of the upper baffle 1103, and the other end is fixedly connected to the inner wall of the housing 1. There are at least two first compression springs 13, which are evenly arranged circumferentially around the axis of the valve stem 11. When the valve body 2 is closed, the first compression springs 13 are in a compressed state. Using the elastic force of the first compression springs 13, when the push block 12 slides upward, it pushes the valve stem 11 to move upward, thereby causing the valve disc 19 to move upward and open the valve body 2.

[0050] In this embodiment, when the toothed plate 21 slides to its limit position to the left, the horizontal toothed plate 2101 separates from the transmission gear 20. At this time, the horizontal toothed plate 2101 and the transmission gear 20 are no longer meshed. Its function is as follows: when the valve body 2 is opened and closed by rotating the side handle 23, the force block 3 can be stopped at a set height by rotating the upper handle 9. At this time, under the action of the first compression spring 13, the push block 12 is stopped at a specific height, thereby determining the maximum distance between the valve disc 19 and the flange ring 204. The maximum distance between the valve disc 19 and the flange ring 204 determines the maximum flow rate of the fluid. Therefore, by rotating the upper handle 9 to control the force block 3 to stop at different heights, the maximum flow rate of the fluid can be controlled. It can be seen that when the valve body 2 is opened and closed by rotating the side handle 23, the upper handle 9 plays the role of adjusting the maximum flow rate of the valve body 2.

[0051] Furthermore, a lower baffle 1101 is fixedly installed at the bottom of the valve stem 11, and a guide hole 1104 is opened at the bottom of the valve stem 11, penetrating the lower baffle 1101. A guide rod 16 is fixedly installed on the valve disc 19, and the guide rod 16 is elastically slidably inserted into the guide hole 1104. A second compression spring 18 is connected between the top of the guide rod 16 and the top of the guide hole 1104. One end of the second compression spring 18 is fixedly connected to the top of the guide rod 16, and the other end is fixedly connected to the top of the guide hole 1104. Under the connecting action of the second compression spring 18, the guide rod 16 will not detach from the guide hole 1104. The minimum compression force of the second compression spring 18 is greater than the impact force of the fluid on the bottom of the valve disc 19 when the valve body 2 is closed, so that the valve disc 19 can stably block the slide cavity 203. Specifically, when the valve stem 11 slides downward under the downward force of the push block 12, it drives the guide rod 16 and the valve disc 19 to move downward, so that the valve disc 19 presses against the top opening of the flange ring 204. Under the elastic force of the second compression spring 18, when the valve disc 19 moves downward too high, the guide rod 16 will slide upward to compress the second compression spring 18, so that the guide rod 16 has space to slide upward, thereby reducing the wear between the valve disc 19 and the flange ring 204 caused by excessive force, and improving service life.

[0052] Furthermore, a cylinder 17 is fixed in the sliding cavity 203. The cylinder 17 is coaxially arranged with the sliding cavity 203. The bottom surface of the cylinder 17 is sealed and fitted with the top surface of the flange ring 204. The lower baffle 1101 is located above the cylinder 17, and the bottom surface of the lower baffle 1101 is sealed and fitted with the top surface of the cylinder 17. Specifically, in the initial state, the vertical distance between the bottom of the lower baffle 1101 and the top of the valve disc 19 is greater than the vertical distance between the bottom of the lower baffle 1101 and the top of the cylinder 17. This means that when the valve disc 19 is pressed against the flange ring 204 to block the slide cavity 203, the bottom of the lower baffle 1101 does not abut against the top of the cylinder 17. At this time, only the valve disc 19 plays the role of blocking the slide cavity 203. Furthermore, in order to reduce the height of the shut-off valve, when the upper handle 9 is rotated to move the force block 3 to the lowest position, the bottom of the lower baffle 1101 still does not abut against the top of the cylinder 17. When wear between valve disc 19 and flange ring 204 prevents valve disc 19 from sealing the slide cavity 203, the side handle 23 can be rotated clockwise to drive the second threaded rod 22 to rotate clockwise simultaneously. This causes the toothed plate 21 to slide to the left, driving the transmission gear 20 to rotate clockwise. At this time, the transmission gear 20 further drives the push block 12 to slide down, so that the push block 12 further presses down the valve stem 11. At this time, the guide rod 16 further compresses the second compression spring 18, causing the lower baffle 1101 to continuously approach the cylinder 17 until the bottom surface of the lower baffle 1101 is sealed and fitted with the top surface of the cylinder 17, thereby sealing the slide cavity 203. This results in the slide cavity 203 being doubly sealed. Even if valve disc 19 and flange ring 204 experience significant wear, the slide cavity 203 can still be sealed, thereby achieving the closure of the valve body 2.

[0053] In this embodiment, a connecting pipe 15 is sealed to the opening of the sliding cavity 203. One end of the connecting pipe 15 is fixedly connected to the valve body 2 by bolts, and the other end is fixedly connected to the housing 1 by bolts. A bellows 14 is provided in the connecting pipe 15. The outer side of the bellows 14 fits against the inner wall of the connecting pipe 15 to seal the inner cavity of the connecting pipe 15. The valve stem 11 passes through the bellows 14. A sliding plate 1102 is fixed on the valve stem 11 and slides against the inner wall of the connecting pipe 15. Under the action of the sliding plate 1102, the stability of the valve stem 11 sliding up and down can be improved, and at the same time, it can limit the bottom of the bellows 14. The bottom of the bellows 14 is sealed against the top surface of the sliding plate 1102. The bellows 14 is pressed into the space enclosed by the inner wall of the connecting pipe 15 and the top surface of the sliding plate 1102, so that when the valve body 2 is opened, the fluid will not flow out from the top of the sliding cavity 203. The setting and function of the bellows 14 are existing technologies and will not be described in detail.

[0054] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dual-operation shut-off valve, characterized in that, include: The valve body (2) has a sliding cavity (203) perpendicular to the valve body (2) inside. The housing (1) is fixedly installed above the valve body (2); The valve stem (11) is elastically slidably inserted into the sliding cavity (203), the top of the valve stem (11) extends into the housing (1), and the bottom of the valve stem (11) is provided with a valve disc (19). Push block (12) is slidably disposed inside the housing (1) and abuts against the top of valve stem (11); The upper handle (9) is rotatably positioned above the housing (1) and is connected to the push block (12) via the first transmission mechanism. Rotating the upper handle (9) drives the first transmission mechanism to push the push block (12) downward to squeeze the valve stem (11) so that the valve disc (19) closes the valve body (2). The side handle (23) is rotatably disposed on the front side of the housing (1) and is connected to the push block (12) via the second transmission mechanism. Rotating the side handle (23) drives the second transmission mechanism to push the push block (12) downward to press the valve stem (11) so that the valve disc (19) closes the valve body (2). The first transmission mechanism includes a first threaded rod (4) fixedly disposed below the upper handle (9) and a force-applying block (3) slidably disposed in the housing (1). The bottom of the force-applying block (3) abuts against the top of the push block (12). The first threaded rod (4) passes through the top of the housing (1) and is threadedly inserted into the force-applying block (3). Rotating the upper handle (9) drives the first threaded rod (4) to rotate synchronously so that the force-applying block (3) slides down or up. A cover (6) is fixedly disposed on the housing (1). A first stepped ring (7) is fixedly disposed on the cover (6). An inverted "T" shaped limiting plate (8) is rotatably disposed between the first stepped ring (7) and the cover (6). The top of the limiting plate (8) passes through the first stepped ring (7) and is fixedly connected to the bottom of the upper handle (9). The bottom of the limiting plate (8) is fixedly connected to the top of the first threaded rod (4). The second transmission mechanism includes a second threaded rod (22) rotatably inserted into the side of the housing (1) and a transmission gear (20) rotatably disposed in the housing (1). One end of the second threaded rod (22) is located outside the housing (1) and fixedly connected to the side handle (23), and the other end is located inside the housing (1). The second threaded rod (22) located inside the housing (1) is threaded with a toothed plate (21) that is slidably connected to the inner cavity of the housing (1). The toothed plate (21) meshes with the transmission gear (20). The push block (12) is fixedly provided with vertical teeth (1201) that mesh with the transmission gear (20). A second stepped ring (24) is fixedly provided on the outer side of the housing (1). A limiting disk (25) is rotatably provided between the second stepped ring (24) and the outer side of the housing (1). The limiting disk (25) is fixedly sleeved on the second threaded rod (22).

2. The dual-operation shut-off valve according to claim 1, characterized in that: The sliding cavity (203) is fixedly provided with a flange ring (204) arranged coaxially with the valve disc (19). The valve disc (19) and the top opening of the flange ring (204) abut against each other to make the sliding cavity (203) open and closed.

3. The dual-operation shut-off valve according to claim 1, characterized in that: A fixing plate (101) is fixed inside the housing (1), and one end of the second threaded rod (22) located inside the housing (1) is rotatably connected to the fixing plate (101).

4. The dual-operation shut-off valve according to claim 1, characterized in that: The valve stem (11) is fixed with an upper baffle (1103) at the top. A first compression spring (13) is provided between the bottom of the upper baffle (1103) and the inner wall of the housing (1). When the valve body (2) is closed, the first compression spring (13) is in a compressed state.

5. The dual-operation shut-off valve according to claim 1, characterized in that: A lower baffle (1101) is fixedly installed at the bottom of the valve stem (11), and a guide hole (1104) is opened at the bottom of the valve stem (11) through the lower baffle (1101). A guide rod (16) is fixedly installed on the valve disc (19), and the guide rod (16) is elastically slidably inserted into the guide hole (1104).

6. The dual-operation shut-off valve according to claim 1, characterized in that: The opening of the sliding cavity (203) is sealed with a connecting pipe (15), and a bellows (14) is provided in the connecting pipe (15). The valve stem (11) passes through the bellows (14), and a sliding plate (1102) is fixed on the valve stem (11) and slides against the inner wall of the connecting pipe (15). The bellows (14) is pressed into the space formed by the inner wall of the connecting pipe (15) and the top surface of the sliding plate (1102).

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