A compact gate valve

Abstract

The application discloses a compact gate valve and relates to the technical field of valves.The compact gate valve comprises a valve body, a medium flow channel along a first direction and a mounting cavity along a second direction, the medium flow channel is communicated with the mounting cavity, the first direction is perpendicular to the second direction, a gate plate is arranged in the mounting cavity and is slidably connected with the valve body along the second direction, a linear driving part comprises a main body arranged outside the valve body and a power output end extending into the mounting cavity, the power output direction of the power output end is parallel to the second direction, the power output end can drive the gate plate to reciprocally move relative to the valve body along the second direction so as to make the medium flow channel conductive or blocked, and a displacement amplification mechanism is arranged in the mounting cavity and located between the gate plate and the power output end.The linear driving part with short stroke can realize opening and closing of the gate plate, and the required installation space of the linear driving part outside the valve body is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a compact gate valve. Background Technology

[0002] Gate valves rely on the vertical lifting and lowering of a gate to control the flow of pipelines and waterways, making them the most crucial flow control equipment in water conservancy projects, canals, pumping stations, and water diversion pipelines. Currently, gate lifting and lowering are typically driven electrically or hydraulically, with the stroke of the drive component matching the gate's lifting stroke, requiring a large installation space above the gate valve. However, in some special scenarios, such as underground utility tunnels and irrigation / drainage culverts, vertical installation space is limited, making the installation of long-stroke drive components more difficult. Summary of the Invention

[0003] The purpose of this invention is to provide a compact gate valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a compact gate valve, comprising: The valve body has a medium flow channel along a first direction and a mounting cavity along a second direction; the medium flow channel communicates with the mounting cavity; the first direction is perpendicular to the second direction; A gate is disposed within the mounting cavity and slides in cooperation with the valve body along the second direction; A linear drive includes a main body disposed on the outside of the valve body and a power output end extending into the mounting cavity; the power output direction of the power output end is parallel to the second direction and can drive the gate to reciprocate relative to the valve body along the second direction, so as to open or block the medium flow channel; A displacement amplification mechanism is disposed within the mounting cavity and located between the gate and the power output end; the displacement amplification mechanism is configured to convert the short-stroke displacement of the power output end into the long-stroke displacement of the gate.

[0005] As a further embodiment of the present invention, the displacement amplification mechanism includes a connecting rod, a crank, a drive rod, and a hinge seat; The connecting rod has a first hinge point, a second hinge point, and a third hinge point; the third hinge point is located between the first hinge point and the second hinge point and is close to the first hinge point; The crank is provided with a fourth hinge point that is hinged to the third hinge point, and a fifth hinge point that is hinged to the power output end. The drive rod is provided with a sixth hinge point that is hinged to the second hinge point, and a seventh hinge point that is hinged to the gate. The hinge seat is fixedly disposed in the mounting cavity and is hinged to the first hinge point.

[0006] As a further embodiment of the present invention, the displacement amplification mechanism further includes a support rod disposed between the connecting rod and the crank; The support rod is a telescopic structure and has an eighth hinge point that is hinged to the fifth hinge point, and a ninth hinge point that is hinged to the first hinge point.

[0007] As a further aspect of the present invention, the support rod has a built-in elastic element for cushioning.

[0008] As a further embodiment of the present invention, the elastic element is a compression spring.

[0009] As a further embodiment of the present invention, the support rod includes two connecting seats, the eighth hinge point is located on one of the connecting seats, and the ninth hinge point is located on the other connecting seat; one of the two connecting seats is provided with a sliding rod, and the other is provided with a sliding cylinder; the sliding cylinder is slidably fitted with a sliding sleeve along its axial direction; the sliding sleeve is threadedly fitted with the sliding rod.

[0010] As a further embodiment of the present invention, the third hinge point is configured as an obliquely arranged waist-shaped hole.

[0011] As a further embodiment of the present invention, the linear drive component is a cylinder.

[0012] As a further aspect of the present invention, a guide portion is provided between the valve body and the gate; the guide portion is configured to guide the gate to move linearly along the second direction.

[0013] As a further embodiment of the present invention, the guide portion includes a slidingly fitted guide rail and a slider; one of the guide rail and the slider is disposed on the valve body, and the other is disposed on the gate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The compact gate valve provided by this invention utilizes a linear actuator and a displacement amplification mechanism. The displacement amplification mechanism converts the short-stroke displacement of the linear actuator into the long-stroke displacement of the gate. The short-stroke linear actuator is sufficient to open and close the gate, significantly reducing the installation space required for the linear actuator located outside the valve body. This allows the valve body to be better installed in scenarios with limited vertical installation space, such as underground integrated pipe corridors and irrigation and drainage culverts. Furthermore, the displacement amplification mechanism is integrated into the installation cavity inside the valve body, eliminating the need to increase the external dimensions of the valve body and making the gate valve more suitable for installation in confined spaces. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a compact gate valve provided for an embodiment of the present invention; Figure 2A cross-sectional schematic diagram of the overall structure of a compact gate valve provided for an embodiment of the present invention; Figure 3 A schematic diagram of the displacement amplification mechanism provided in an embodiment of the present invention; Figure 4 A schematic diagram of the support rod structure provided for an embodiment of the present invention; Figure 5 This is a cross-sectional view of the support rod portion structure provided in an embodiment of the present invention; Figure 6 A schematic diagram of the connecting rod structure provided for an embodiment of the present invention; Figure 7 This is a schematic diagram illustrating the working principle of the displacement amplification mechanism provided in an embodiment of the present invention.

[0016] The attached figures are labeled as follows: 10-Valve body, 11-Medium flow channel, 12-Mounting cavity, 20-Gate, 30-Linear drive component, 31-Main body, 32-Power output end, 40-Displacement amplification mechanism, 41-Connecting rod, 411-First hinge point, 412-Second hinge point, 413-Third hinge point, 42-Crank, 421-Fourth hinge point, 422-Fifth hinge point, 43-Drive rod, 431-Sixth hinge point, 432-Seventh hinge point, 44-Hinge seat, 45-Support rod, 451-Eighth hinge point, 452-Ninth hinge point, 453-Elastic component, 454-Connecting seat, 455-Slide rod, 456-Slide cylinder, 457-Slide sleeve, 51-Guide rail, 52-Slider. Detailed Implementation

[0017] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7 The technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0019] Please see Figures 1-2An embodiment of the present invention provides a compact gate valve, comprising a valve body 10, having a medium flow channel 11 along a first direction and a mounting cavity 12 along a second direction; the medium flow channel 11 communicates with the mounting cavity 12; the first direction is perpendicular to the second direction; a gate 20 is disposed within the mounting cavity 12 and slides with the valve body 10 along the second direction; a linear drive 30 includes a main body 31 disposed outside the valve body 10 and a power output end 32 extending into the mounting cavity 12; the power output direction of the power output end 32 is parallel to the second direction and can drive the gate 20 to reciprocate relative to the valve body 10 along the second direction, so as to open or block the medium flow channel 11; a displacement amplification mechanism 40 is disposed within the mounting cavity 12 and located between the gate 20 and the power output end 32; the displacement amplification mechanism 40 is configured to convert the short-stroke displacement of the power output end 32 into the long-stroke displacement of the gate 20.

[0020] In this embodiment, the first direction, the second direction, and the third direction are defined to be perpendicular to each other. For ease of understanding, as follows: Figure 1 As shown, the positive or negative direction of the X-axis is the first direction, and the positive or negative direction of the Y-axis is the second direction.

[0021] The compact gate valve provided in this embodiment uses a linear actuator 30 and a displacement amplification mechanism 40. The displacement amplification mechanism can convert the short-stroke displacement of the linear actuator 30 into the long-stroke displacement of the gate 20. The short-stroke linear actuator 30 can realize the opening and closing of the gate 20, which greatly reduces the installation space required for the linear actuator 30 located outside the valve body 10. This allows the valve body 10 to be better installed in scenarios with limited vertical installation space, such as underground integrated pipe corridors and irrigation and drainage culverts. Furthermore, the displacement amplification mechanism 40 is built into the installation cavity 12 inside the valve body 10, without increasing the external dimensions of the valve body 10, which allows the gate valve to be better adapted to installation in confined spaces.

[0022] Please see Figure 2 , Figure 3 and Figure 7 As shown, in an optional embodiment of the present invention, the displacement amplification mechanism 40 includes a connecting rod 41, a crank 42, a drive rod 43, and a hinge seat 44; the connecting rod 41 has a first hinge point 411, a second hinge point 412, and a third hinge point 413; the third hinge point 413 is located between the first hinge point 411 and the second hinge point 412 and is close to the first hinge point 411; the crank 42 has a fourth hinge point 421 hinged to the third hinge point 413 and a fifth hinge point 422 hinged to the power output end 32; the drive rod 43 has a sixth hinge point 431 hinged to the second hinge point 412 and a seventh hinge point 432 hinged to the gate plate 20; the hinge seat 44 is fixedly disposed in the mounting cavity 12 and hinged to the first hinge point 411. It should be understood that, as Figure 7As shown in the figure, a1, b1, and c1 represent the connecting rod 41, driving rod 43, and crank 42 when the gate is open and the medium flow channel 11 is open; a2, b2, and c2 represent the connecting rod 41, driving rod 43, and crank 42 when the gate is closed and the medium flow channel 11 is blocked. The displacement amplification mechanism provided in this embodiment, through the arrangement of the connecting rod 41, crank 42, driving rod 43, and hinge seat 44, allows the linear drive member 30's power output end 32 to drive the crank 42 away from the gate 20 to move downwards. In this case, the crank 42 drives the connecting rod 41 to rotate downwards around the first hinge point 411. The end of the connecting rod 41 that is hinged to the drive rod 43 drives the bottom end of the drive rod 43 to move downward along the second direction Y. The drive rod 43 drives the gate 20 to move downward to block the medium flow channel 11. The power output stroke L1 of the power output end 32 can be converted into the downward stroke L2 of the gate 20. L2 is much larger than L1. The gate 20 can be moved a long distance by the short-distance output of the linear drive 30. In addition, the displacement amplification mechanism in this embodiment has no dead points throughout the entire process, and the opening and closing of the gate 20 is smoother. Furthermore, the displacement amplification mechanism occupies less space in the mounting cavity 12, and the gate valve is highly compact.

[0023] Please see Figure 3 and Figure 4As shown, in an optional embodiment of the present invention, the displacement amplification mechanism 40 further includes a support rod 45 disposed between the connecting rod 41 and the crank 42; the support rod 45 is a telescopic structure and is provided with an eighth hinge point 451 hinged to the fifth hinge point 422 and a ninth hinge point 452 hinged to the first hinge point 411; the support rod 45 has a built-in elastic element 453 for buffering; the elastic element 453 is a compression spring. It should be understood that when the power output end 32 of the linear drive 30 moves downward along the second direction Y, the crank 42 drives the eighth hinge point 451 of the support rod 45 to move synchronously. As the support rod 45 rotates downward around the first hinge point 411, it gradually contracts. When the support rod 45 contracts to its shortest state, the gate 20 moves down to the position of blocking the medium flow channel 11. At this time, the power output end 32 cannot continue to extend downward. When the medium flow channel 11 is blocked, the gate 20 tends to move upward under the action of water pressure. The support rod 45, crank 42, and connecting rod 41 can form a triangular force support to disperse the stress at the hinge point. At the same time, through the elastic element 453 built into the support rod 45, when the water flow impacts the gate 20, the compression spring can absorb the impact load and buffer the impact stress, protecting the displacement amplification mechanism 40 so that it can work more stably. When mud, sand, or stones accumulate at the bottom of the valve body... When impurities prevent the gate 20 from fully closing and it remains in a semi-closed state, the water pressure below the gate continues to push it upwards. The support rod 45, crank 42, and connecting rod 41 still form a stable triangular support frame, continuously providing upward constraint support to limit the gate from being pushed up by the water flow and reduce leakage in the channel. At this time, the linear drive component 30 still has a continuous downward thrust. The support rod 45 can absorb the overload pressure through the telescopic structure and the internal compression spring, preventing the crank, connecting rod, hinge pin, and other transmission components from deforming and breaking due to rigid pressure. At the same time, it prevents the power output end 32 from extending beyond its travel, protecting the linear drive component. Furthermore, when the water flow carries sediment and continuously washes the gate, generating alternating vibrations, the elastic component 453 can continuously buffer the reciprocating impact, reducing sediment wear and noise in each hinged moving pair, extending its service life, and ensuring smooth opening and closing of the mechanism.

[0024] Please see Figures 3-4As shown, in an optional embodiment of the present invention, the support rod 45 includes two connecting seats 454, an eighth hinge point 451 is provided on one of the connecting seats 454, and a ninth hinge point 452 is provided on the other connecting seat 454; one of the two connecting seats 454 is provided with a sliding rod 455, and the other is provided with a sliding cylinder 456; the sliding cylinder 456 is slidably fitted with a sliding sleeve 457 along its axial direction; the sliding sleeve 457 is threadedly fitted with the sliding rod 455. It should be understood that, considering the wear of the sealing surface of the gate 20 seal during long-term use, the closing feed stroke required for complete valve sealing will increase slightly. In this embodiment, the telescopic length of the support rod 45 is designed to be adjustable, and at least one of the slide rod 455 and slide cylinder 456 is rotatably connected to the connecting seat 454, so that the slide rod 455 and slide cylinder 456 can rotate relative to each other. With the cooperation of the sliding sleeve 457, the slide rod 455 and slide cylinder 456 can also move relative to each other along their common axis when rotating, thereby adjusting the distance between the two connecting seats 454, thereby adjusting the telescopic length of the support rod 45, increasing the downward movement distance of the gate 20, and after the sealing surface of the gate 20 is worn, complete sealing can be achieved again by increasing the movement distance.

[0025] Please see Figure 6 As shown, in an optional embodiment of the present invention, the third hinge point 413 is configured as an obliquely arranged waist-shaped hole, and the extension direction of the waist-shaped hole forms a preset angle with the axis of the connecting rod 41. It should be understood that when the crank 42 moves in a planar motion with the power output end 32, the pin used to connect the third hinge point 413 and the fourth hinge point 421 can slide relative to each other in the waist-shaped hole, thereby changing the input force arm of the connecting rod 41 (the distance from the first hinge point 411 to the pin), and thus changing the displacement amplification ratio; at the end of the gate closing, the pin automatically slides to the end away from the first hinge point 411, the input force arm becomes longer, the displacement amplification ratio decreases, and the output thrust increases. At this time, the gate approaches the sealing surface at low speed and obtains a greater sealing clamping force; at the beginning of the gate opening, the pin automatically slides to the end of the waist-shaped hole close to the first hinge point 411, the input force arm becomes shorter, the displacement amplification ratio increases, and the power output end 32 can drive the gate to quickly disengage from the sealing surface with a small stroke, reducing the wear of the sealing surface.

[0026] Please see Figure 1 As shown, in an optional embodiment of the present invention, the linear drive 30 is a cylinder. In some embodiments, the cylinder may also be replaced by a hydraulic cylinder or a helical linear drive.

[0027] Please see Figure 2As shown, in an optional embodiment of the present invention, a guide portion is provided between the valve body 10 and the gate 20; the guide portion is configured to guide the gate 20 to move linearly along a second direction; the guide portion includes a slidingly engaged guide rail 51 and a slider 52; one of the guide rail 51 and the slider 52 is disposed on the valve body 10, and the other is disposed on the gate 20. It should be understood that through the cooperation of the guide rail 51 and the slider 52, the gate 20 can move more smoothly back and forth along the second direction Y.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact gate valve, characterized in that: include: The valve body (10) is provided with a medium flow channel (11) along a first direction and a mounting cavity (12) along a second direction; the medium flow channel (11) is connected to the mounting cavity (12); the first direction is perpendicular to the second direction; A gate (20) is disposed in the mounting cavity (12) and slides in cooperation with the valve body (10) in the second direction; The linear drive (30) includes a main body (31) located outside the valve body (10) and a power output end (32) extending into the mounting cavity (12); the power output direction of the power output end (32) is parallel to the second direction and can drive the gate (20) to reciprocate relative to the valve body (10) along the second direction so as to open or block the medium flow channel (11); The displacement amplification mechanism (40) is disposed in the mounting cavity (12) and located between the gate (20) and the power output end (32); the displacement amplification mechanism (40) is configured to convert the short-stroke displacement of the power output end (32) into the long-stroke displacement of the gate (20); The displacement amplification mechanism (40) includes a connecting rod (41), a crank (42), a drive rod (43), and a hinge seat (44). The connecting rod (41) is provided with a first hinge point (411), a second hinge point (412) and a third hinge point (413); the third hinge point (413) is located between the first hinge point (411) and the second hinge point (412) and is close to the first hinge point (411). The crank (42) is provided with a fourth hinge point (421) that is hinged to the third hinge point (413), and a fifth hinge point (422) that is hinged to the power output end (32). The drive rod (43) is provided with a sixth hinge point (431) that is hinged to the second hinge point (412), and a seventh hinge point (432) that is hinged to the gate (20). The hinge seat (44) is fixedly disposed in the mounting cavity (12) and is hinged to the first hinge point (411); The displacement amplification mechanism (40) also includes a support rod (45) disposed between the connecting rod (41) and the crank (42). The support rod (45) is a telescopic structure and has an eighth hinge point (451) that is hinged to the fifth hinge point (422) and a ninth hinge point (452) that is hinged to the first hinge point (411). The support rod (45) has a built-in elastic element (453) for cushioning.

2. A compact gate valve according to claim 1, characterized in that: The elastic element (453) is a compression spring.

3. A compact gate valve according to claim 1, characterized in that: The support rod (45) includes two connecting seats (454), the eighth hinge point (451) is located on one of the connecting seats (454), and the ninth hinge point (452) is located on the other connecting seat (454); one of the two connecting seats (454) is provided with a sliding rod (455), and the other is provided with a sliding cylinder (456); the sliding cylinder (456) is slidably fitted with a sliding sleeve (457) along its axial direction; the sliding sleeve (457) is threadedly fitted with the sliding rod (455).

4. A compact gate valve according to claim 1, characterized in that: The third hinge point (413) is set as an obliquely arranged waist-shaped hole.

5. A compact gate valve according to claim 1, characterized in that: The linear drive component (30) is a cylinder.

6. A compact gate valve according to claim 1, characterized in that: A guide portion is provided between the valve body (10) and the gate (20); the guide portion is configured to guide the gate (20) to move linearly along the second direction.

7. A compact gate valve according to claim 6, characterized in that: The guide portion includes a sliding guide rail (51) and a slider (52); one of the guide rail (51) and the slider (52) is located on the valve body (10), and the other is located on the gate (20).

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