A self-locking knife-type cartridge valve and cartridge plate door

Abstract

The application discloses a self-locking knife type box valve and a box plate door, and relates to the technical field of fluid control valves.The self-locking knife type box valve comprises a square valve body, a space is formed in the square valve body, the square valve body comprises a top panel and a bottom panel, and a valve port is formed in the top panel;the knife type box plate can be translated in the square valve body to cover or avoid the valve port, and the knife type box plate can be displaced towards the direction of being close to or away from the top panel;the jacking piece comprises a first lifting block arranged on the top surface of the bottom panel and a second lifting block arranged on the bottom surface of the knife type box plate, the second lifting block is used for being connected with the first lifting block when the knife type box plate is displaced to the position of the valve port, and the interface of the first lifting block and the second lifting block is provided with a jacking inclined surface.The self-locking knife type box valve can realize sealing and locking, can avoid the friction of particles on the sealing surface, and prolongs the service life of the knife type box valve.

Description

Technical Field

[0001] This invention relates to the field of fluid control valve technology, specifically to a self-locking knife valve and its gate. Background Technology

[0002] Knife gate valves (also known as knife gate valves) are a commonly used shut-off valve. Their gates are knife-shaped, cutting off media containing fibers, particles, and other impurities through vertical lifting or horizontal movement. However, existing knife gate valves have a prominent problem in practical use: during the opening and closing process, especially when opening, materials adhering to the gate surface, particularly hard particles, are carried into the gap between the gate and the sealing surface. As the gate moves, these particles roll back and forth in the gap, repeatedly rubbing the sealing surface like sandpaper, causing severe scratches on the gate surface, accelerating wear on the sealing surface, and ultimately leading to seal failure. This problem is particularly prominent when conveying media containing hard particles such as sand and slag, seriously affecting the service life and reliability of the knife gate valve. Summary of the Invention

[0003] This application provides a self-locking knife valve and a gate, which can solve the technical problem in the prior art where, when a traditional knife valve is opened, the material adhering to the surface of the gate rolls back and forth in the sealing gap as the gate moves, causing sealing failure.

[0004] In a first aspect, embodiments of this application provide a self-locking knife-type valve, comprising: A square valve body with an internal space, the square valve body includes a top panel and a bottom panel, and a valve port is provided on the top panel; A knife-shaped casing plate, which can be translated within the square valve body to cover or avoid the valve port, and the knife-shaped casing plate can be displaced toward or away from the top panel; The lifting component includes a first lifting block disposed on the top surface of the bottom panel and a second lifting block disposed on the bottom surface of the blade-shaped cartridge plate for engaging with the first lifting block when the blade-shaped cartridge plate is displaced to the valve port position. The interface between the first lifting block and the second lifting block is provided with a lifting inclined surface.

[0005] In one embodiment, the square valve body further includes four side plates, which together with the top panel and the bottom panel form the square valve body.

[0006] In one embodiment, the bottom panel is further provided with a mounting port.

[0007] In one embodiment, the blade-shaped casing plate is square, and the side length of the blade-shaped casing plate is greater than the diameter of the valve port.

[0008] In one embodiment, the blade-shaped casing plate is provided with a push rod, one end of which enters the square valve body to connect with the blade-shaped casing plate, and the other end is connected to a push motor. The output end of the push motor extends into the square valve body to float and connect with the push rod.

[0009] In one embodiment, the output end of the drive motor is provided with a first connecting end, and the corresponding end of the push rod is provided with a second connecting end. A sliding member is provided between the first connecting end and the second connecting end, and the sliding member allows the first connecting end and the second connecting end to slide relative to each other in a direction perpendicular to the axis of the push rod.

[0010] In one embodiment, the drive motor and the square valve body are spaced apart, and a sealing element is provided between the drive motor and the square valve body, which is sleeved on the output end of the drive motor.

[0011] In one embodiment, the first lifting block includes a first flat portion away from the drive motor and a first inclined portion close to the drive motor, and the second lifting block includes a second flat portion close to the drive motor and a second inclined portion away from the drive motor.

[0012] In one embodiment, the blade-shaped casing plate is spaced apart from the bottom panel, and the distance between the blade-shaped casing plate and the bottom panel is less than the total height of the first lifting block and the second lifting block in the docked state.

[0013] Secondly, embodiments of this application provide a casing door, which includes the aforementioned self-locking knife-type casing valve.

[0014] The beneficial effects of the technical solutions provided in this application include: This application features a first lifting block on the top surface of the bottom panel and a second lifting block on the bottom surface of the knife-shaped valve body, with a lifting ramp at their interface. When the knife-shaped valve body moves to the closed position, the ramps of the two lifting blocks cooperate to lift the knife-shaped valve body upwards, tightly covering and locking it over the valve opening. When the knife-shaped valve body moves in the opening direction, the two lifting blocks disengage, and the knife-shaped valve body naturally sinks under its own weight, forming a clearance gap with the top panel. At this time, particulate material adhering to the surface of the knife-shaped valve body automatically falls out through this gap or is scraped off by the sealing surface, no longer being trapped and rolling back and forth between the sealing surfaces. This effectively prevents particulate matter from scratching the sealing surface and significantly extends the service life of the knife-shaped valve body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a self-locking knife-type box valve structure provided in an embodiment of this application; Figure 2 A cross-sectional view of a self-locking knife-type box valve provided in an embodiment of this application; Figure 3 This is a schematic diagram of the back structure of a self-locking knife-type box valve provided in an embodiment of this application.

[0017] In the diagram: 1. Square valve body; 101. Top panel; 102. Bottom panel; 103. Valve port; 104. Side plate; 105. Mounting port; 2. Knife-shaped box plate; 3. First lifting block; 4. Second lifting block; 5. Push rod; 6. Push motor; 7. Sliding component; 8. Sealing component. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0019] Firstly, the embodiments of this application provide a self-locking knife valve, which can solve the technical problem in the prior art where, when a traditional knife valve is opened, the material adhering to the surface of the gate will roll back and forth in the sealing gap as the gate moves, leading to sealing failure.

[0020] It includes a square valve body 1, a knife-shaped casing 2, and a lifting member. The square valve body 1 is used to form a valve cavity. The knife-shaped casing 2 is disposed inside the square valve body 1 and is used to cut off or allow fluid flow. The lifting member is used to lift the knife-shaped casing 2 when closed to achieve a self-locking seal.

[0021] Specifically, Figure 1 This application provides a schematic diagram of a self-locking knife-type box valve structure, as shown in the embodiment. Figure 1As shown, the square valve body 1 includes a top panel 101 and a bottom panel 102. A valve port 103 is provided on the top panel 101. The square valve body 1 has an internal space for accommodating internal functional components. The top panel 101 and bottom panel 102 are arranged opposite to each other, together forming the main structure of the square valve body 1. The valve port 103 on the top panel 101 serves as a channel for fluid to enter and exit the square valve body 1, and is used for connection to external pipelines. The bottom panel 102 is located at the bottom of the square valve body 1, providing a mounting base for other components.

[0022] Furthermore, Figure 2 A cross-sectional view of a self-locking knife-type cartridge valve provided in an embodiment of this application, such as... Figure 2 As shown, the knife-shaped cover plate 2 is disposed inside the square valve body 1, and the knife-shaped cover plate 2 can be horizontally moved inside the square valve body 1. When it moves to the valve port 103, the knife-shaped cover plate 2 covers the valve port 103, blocking the flow of fluid. When it moves away from the valve port 103, the knife-shaped cover plate 2 avoids the valve port 103, allowing the fluid to pass through. In addition, the knife-shaped cover plate 2 can also move towards the top panel 101 to press the valve port 103 to achieve a seal; or move away from the top panel 101 to release the pressure on the valve port 103. The horizontal and vertical movements of the knife-shaped cover plate 2 cooperate to complete the valve's opening, closing, and sealing functions.

[0023] Further, see Figure 2 The lifting component is used to drive the knife-shaped cartridge plate 2 to move towards the top panel 101 when it is translated to the valve port 103 position. The lifting component includes a first lifting block 3 and a second lifting block 4. The first lifting block 3 is disposed on the top surface of the bottom panel 102, and the second lifting block 4 is disposed on the bottom surface of the knife-shaped cartridge plate 2. When the knife-shaped cartridge plate 2 is translated to the valve port 103 position, the second lifting block 4 is in contact with the first lifting block 3. The interface between the first lifting block 3 and the second lifting block 4 is provided with a lifting inclined surface. When the two lifting blocks are in contact, the lifting inclined surfaces slide against each other, forcing the knife-shaped cartridge plate 2 to rise relative to the bottom panel 102, thereby bringing the knife-shaped cartridge plate 2 closer to the top panel 101 and achieving a tight seal on the valve port 103. When the knife-shaped cartridge plate 2 is translated in the opposite direction, the two lifting blocks disengage, the lifting inclined surfaces no longer apply lifting force, and the knife-shaped cartridge plate 2 can move away from the top panel 101 under its own weight.

[0024] When the knife-shaped casing 2 moves horizontally in the opening direction, the first lifting block 3 and the second lifting block 4 disengage, and the lifting slope no longer applies lifting force. Under its own weight, the knife-shaped casing 2 naturally sinks, forming a clearance gap with the top panel 101. At this time, particulate material adhering to the surface of the knife-shaped casing 2 automatically falls out of this gap or is scraped off by the first lifting block 3, no longer being trapped between the knife-shaped casing 2 and the top panel 101 and rolling back and forth. This completely avoids scratching the sealing surface by particulate matter and significantly extends the service life of the knife-shaped casing valve.

[0025] Furthermore, Figure 3 This application provides a schematic diagram of the back structure of a self-locking knife-type box valve, as shown in the embodiments. Figure 3 As shown, the square valve body 1 also includes four side plates 104. The four side plates 104 are located around the square valve body 1, and together with the top panel 101 and the bottom panel 102, they enclose the internal space of the square valve body 1. The top panel 101 is located at the top of the square valve body 1, the bottom panel 102 is located at the bottom of the square valve body 1, and the four side plates 104 are connected between the top panel 101 and the bottom panel 102, forming the four side walls of the square valve body 1.

[0026] Further, see Figure 3 The bottom panel 102 is also provided with a mounting port 105, which is used for external drive components to pass through to connect the knife-shaped casing 2, and can also serve as a maintenance passage. The knife-shaped casing 2 is square, and the side length of the knife-shaped casing 2 is larger than the diameter of the valve port 103. The valve port 103 is configured as a circle with the same shape as the pipeline. This dimensional relationship ensures that when the knife-shaped casing 2 is moved to the valve port 103, it can completely cover the valve port 103, avoiding fluid leakage due to incomplete coverage. At the same time, the square knife-shaped casing 2 matches the internal space of the square valve body 1, which is conducive to smooth translation and limiting.

[0027] Further, see Figure 2 A push rod 5 is provided on the blade-shaped casing plate 2. One end of the push rod 5 enters the square valve body 1 and connects to the blade-shaped casing plate 2, while the other end is used to connect to an external drive device to transmit driving force to the blade-shaped casing plate 2, causing it to translate within the square valve body 1. In this embodiment, the external drive device is a push motor 6, the output end of which extends into the square valve body 1 and is floatingly connected to the push rod 5. Floating connection means that the output end of the push motor 6 and the push rod 5 are allowed to slide relative to each other in a direction perpendicular to the axis of the push rod 5. This connection method ensures that when the blade-shaped casing plate 2 is driven by the lifting member to move towards the top panel 101, this displacement is not rigidly constrained by the push rod 5, thus guaranteeing that the blade-shaped casing plate 2 can smoothly complete the lifting action and achieve a tight fit with the top panel 101.

[0028] Further, see Figure 2The output end of the drive motor 6 is provided with a first connecting end, and the corresponding end of the push rod 5 is provided with a second connecting end. A sliding member 7 is provided between the first connecting end and the second connecting end, allowing the first connecting end and the second connecting end to slide relative to each other in a direction perpendicular to the axis of the push rod 5. With this structure, when the blade-shaped box plate 2 is driven by the lifting member to produce a displacement toward the top panel 101, the push rod 5 will produce a micro-movement perpendicular to its axis, avoiding rigid interference, thereby ensuring that the blade-shaped box plate 2 can smoothly complete the lifting action. The specific form of the sliding member 7 can adopt any connection structure in the prior art that can achieve relative sliding, such as: T-slot and T-head cooperation, dovetail groove and slider cooperation, linear bearing and guide shaft cooperation, or spline pair, etc., and this application does not limit it in this regard.

[0029] Furthermore, the drive motor 6 and the square valve body 1 are spaced apart, with a certain distance between them. A mounting hole is provided on the corresponding side plate 104 of the square valve body 1, through which the output end of the drive motor 6 extends into the interior of the square valve body 1 and floats with the push rod 5. A sealing element 8 is provided between the output end of the drive motor 6 and the mounting hole of the square valve body 1, and this sealing element 8 is sleeved on the outside of the output end of the drive motor 6. The sealing element 8 is configured as a packing seal to prevent fluid inside the square valve body 1 from leaking outward along the outer wall of the output end of the drive motor 6.

[0030] Further, see Figure 2 The first lifting block 3 includes a first flat portion away from the drive motor 6 and a first inclined portion close to the drive motor 6. The second lifting block 4 includes a second flat portion close to the drive motor 6 and a second inclined portion away from the drive motor 6. The side of the first and second inclined portions away from the drive motor 6 is higher, and the side close to the drive motor 6 is lower. The first inclined portion of the first lifting block 3 and the second inclined portion of the second lifting block 4 are close to each other. When the knife-shaped box plate 2 moves towards the closing direction, that is, away from the motor, the first and second inclined portions come into contact. The second inclined portion gradually rises along the first inclined portion, thereby lifting the knife-shaped box plate 2 and moving it towards the top panel 101. When the knife-shaped box plate 2 moves to the closing position, that is, directly opposite the valve port 103, the first flat portion and the second flat portion are connected, the knife-shaped box plate 2 rises to the highest point, fits against the valve port 103 and is locked in the lifted state, achieving self-locking. Conversely, when the knife-shaped box plate 2 moves towards the opening direction, the first and second inclined portions disengage, and the knife-shaped box plate 2 descends by its own weight.

[0031] Furthermore, the blade-shaped casing 2 and the bottom panel 102 are spaced apart, maintaining a certain distance between them. The distance between the blade-shaped casing 2 and the bottom panel 102 is less than the total height of the first lifting block 3 and the second lifting block 4 in the docked state. The first lifting block 3 is located on the top surface of the bottom panel 102, and the second lifting block 4 is located on the bottom surface of the blade-shaped casing 2. When the blade-shaped casing 2 moves to the closed position, the first lifting block 3 and the second lifting block 4 dock with each other, and the sum of their heights is the total height in the docked state. Because the distance between the blade-shaped casing 2 and the bottom panel 102 is less than this total height, during the docking process, the second lifting block 4 cannot be completely flat on the first lifting block 3, but is forced to rise upwards along the inclined surface of the first lifting block 3, thereby causing the blade-shaped casing 2 to move towards the top panel 101. This dimensional constraint ensures that the lifting inclined surface can effectively function, achieving reliable lifting and self-locking of the blade-shaped casing 2.

[0032] Secondly, this application also provides a box door, including the aforementioned self-locking knife-type box valve.

[0033] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0034] It should be noted that in this application, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A self-locking knife-type box valve, characterized in that, include: The square valve body (1) forms a space inside. The square valve body (1) includes a top panel (101) and a bottom panel (102), and a valve port (103) is provided on the top panel (101). The blade-shaped box plate (2) can be translated within the square valve body (1) to cover or avoid the valve port (103), and the blade-shaped box plate (2) can be displaced toward or away from the top panel (101); The lifting component includes a first lifting block (3) disposed on the top surface of the bottom panel (102) and a second lifting block (4) disposed on the bottom surface of the blade-shaped box plate (2) for engaging with the first lifting block (3) when the blade-shaped box plate (2) is moved to the position of the valve port (103). The interface between the first lifting block (3) and the second lifting block (4) is provided with a lifting slope.

2. The self-locking knife-type box valve as described in claim 1, characterized in that: The square valve body (1) also includes four side plates (104), which together with the top panel (101) and the bottom panel (102) form the square valve body (1).

3. A self-locking knife valve as described in claim 2, characterized in that: The bottom panel (102) is also provided with an installation port (105).

4. A self-locking knife-type box valve as described in claim 1, characterized in that: The blade-shaped box plate (2) is square, and the side length of the blade-shaped box plate (2) is greater than the diameter of the valve port (103).

5. A self-locking knife-type box valve as described in claim 1, characterized in that: The blade-shaped box plate (2) is provided with a push rod (5). One end of the push rod (5) enters the square valve body (1) to connect with the blade-shaped box plate (2), and the other end is connected to a push motor (6). The output end of the push motor (6) extends into the square valve body (1) to float and connect with the push rod (5).

6. A self-locking knife-type box valve as described in claim 5, characterized in that: The output end of the drive motor (6) is provided with a first connection end, and the corresponding end of the push rod (5) is provided with a second connection end. A sliding member (7) is provided between the first connection end and the second connection end, and the sliding member (7) allows the first connection end and the second connection end to slide relative to each other in a direction perpendicular to the axis of the push rod (5).

7. A self-locking knife-type box valve as described in claim 5, characterized in that: The drive motor (6) and the square valve body (1) are spaced apart, and a sealing element (8) is provided between the drive motor (6) and the square valve body (1) and sleeved on the output end of the drive motor (6).

8. A self-locking knife-type box valve as described in claim 5, characterized in that: The first lifting block (3) includes a first flat portion away from the drive motor (6) and a first inclined portion close to the drive motor (6), and the second lifting block (4) includes a second flat portion close to the drive motor (6) and a second inclined portion away from the drive motor (6).

9. A self-locking knife-type box valve as described in claim 8, characterized in that: The blade-shaped box plate (2) is spaced apart from the bottom panel (102), and the distance between the blade-shaped box plate (2) and the bottom panel (102) is less than the total height of the first lifting block (3) and the second lifting block (4) in the docking state.

10. A type of panel door, characterized in that, The box door includes the self-locking knife-type box valve as described in any one of claims 1 to 9.

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