Multi-layer sealing anti-crystallization wear-resistant gate valve

Abstract

The invention relates to the technical field of valves, in particular to a multi-layer sealing crystallization-resistant wear-resistant gate valve which comprises a pair of cover plates, a valve plate, an air cylinder, a floating sealing ring and a sealing pressure adjusting assembly. The trigger piece drives the pressing ring to abut against the floating sealing ring in the axial direction of the connector so that the pressing ring can be tightly attached to the surface of the valve plate to form axial sealing, and dynamic loading and releasing of sealing pressure are achieved by arranging the floating sealing ring capable of moving axially and the sealing pressure adjusting assembly triggered by the valve plate to act. Therefore, the contradictory problem that the movement flexibility of the valve plate and the sealing reliability in the closed state in a traditional gate valve are difficult to consider is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a multi-layered sealing, anti-crystallization, and wear-resistant slide gate valve. Background Technology

[0002] Slide gate valves, as a crucial isolation device, are widely used in vacuum equipment such as coating machines, primarily for sealing and isolating the cavity from the vacuum pump. The basic working principle of a traditional slide gate valve is to open and close the passage through the reciprocating motion of the valve plate. When the vacuum pump stops working, the valve plate closes to isolate the cavity from the pump body, maintaining the system vacuum or protecting the vacuum pump from contamination.

[0003] To ensure smooth valve plate movement, the frictional force between the seal and the valve plate must be kept low, typically less than the valve plate's opening force. This requirement limits the clamping force of the sealing ring on the valve plate, thus affecting the gate's sealing performance in the closed state. Especially in high vacuum or crystalline environments, lower sealing pressure can lead to micro-leakage, impacting process stability and equipment reliability.

[0004] Traditional slide gate valves typically use fixed sealing rings, whose clamping force is determined during installation and cannot be dynamically adjusted according to changes in operating conditions. This static sealing design struggles to balance the conflicting requirements of smooth valve plate movement and tight sealing. On one hand, to ensure flexible valve plate movement, the sealing pressure needs to be maintained at a low level; on the other hand, to achieve an ideal sealing effect, especially after long-term use when the sealing ring wears or the material ages, a higher sealing pressure is required.

[0005] Therefore, there is an urgent need for a new type of gate valve sealing technology that can significantly improve the sealing reliability in the closed state while ensuring the flexibility of the valve plate movement, so as to adapt to complex industrial application environments. Summary of the Invention

[0006] To address the problems existing in the prior art, a multi-layered sealing anti-crystallization wear-resistant slide gate valve is provided. By setting an axially movable floating sealing ring and a sealing pressure regulating component triggered by the valve plate, dynamic loading and release of sealing pressure is achieved, thereby effectively solving the contradiction between the flexibility of valve plate movement and the sealing reliability in the closed state in traditional slide gate valves.

[0007] To address the problems of existing technologies, this invention provides a multi-layered sealing anti-crystallization wear-resistant slide gate valve, comprising a pair of opposing cover plates, a valve plate movably disposed between the pair of cover plates, and a cylinder mounted on the top of the cover plates for driving the valve plate. The cover plates have an interface, and the valve plate has a valve port that communicates with the interface. An annular mounting groove is coaxially formed on the inner side of the interface of the cover plate. The slide gate valve further includes: a floating sealing ring, which is axially movable within the mounting ring groove; and a sealing pressure regulating assembly, including a clamping ring and a trigger. The clamping ring is coaxially slidably disposed within the mounting ring groove and abuts against the inner side of the floating sealing ring. The trigger is disposed on the valve plate and is used to drive the clamping ring to generate axial displacement when the valve is closed. When the valve plate moves to a closed position where its valve port is misaligned with the cover plate interface, the trigger drives the clamping ring to press against the floating sealing ring axially along the interface, making it tightly adhere to the surface of the valve plate to form an axial seal.

[0008] Preferably, the inner edge of the mounting ring groove facing the valve plate and the inner edge of the corresponding clamping ring are both constructed with mutually cooperating annular conical surfaces. The floating sealing ring is coaxially disposed at the annular conical surface. When the clamping ring is driven to move axially, the annular conical surface of the clamping ring presses against the floating sealing ring, driving the floating sealing ring to move axially and contract radially inward.

[0009] Preferably, the mounting ring groove has a first conical surface on its inner periphery facing the valve plate; the floating sealing ring is fitted on the first conical surface; the clamping ring has a second conical surface corresponding to the inner edge of the floating sealing ring and engaging with it; when the clamping ring moves along its axial direction, the second conical surface presses against and drives the floating sealing ring to generate radially inward elastic contraction deformation while generating axial displacement.

[0010] Preferably, the sealing pressure regulating assembly further includes a drive ring coaxially mounted in the mounting ring groove, and a drive block slidably disposed between the two valve plates in the vertical direction and connected to the drive ring in a driving transmission manner; wherein, the drive ring has a stepped ring groove at one end facing the valve plate, the clamping ring is coaxially disposed in the stepped ring groove, and the two are coupled and driven by a mutually cooperating inclined structure; the trigger includes a vertical slide groove formed on the valve plate for the drive block to slide, when the valve plate moves upward, the bottom of the slide groove pushes the drive block upward, thereby driving the drive ring to rotate, and the clamping ring is driven to move axially through the inclined structure.

[0011] Preferably, the inner circumference of the clamping ring is splined with the inner wall of the mounting ring groove.

[0012] Preferably, the drive ring is provided with a guide post extending along its axial direction, and the drive block is provided with a guide groove extending in a direction perpendicular to the movement direction of the valve plate, and the guide post extends into the guide groove and slides in cooperation with it.

[0013] Preferably, the sealing pressure regulating assembly further includes an upper positioning block and a lower positioning block disposed between the two valve plates, the driving block is slidably disposed between the upper positioning block and the lower positioning block, the bottom end of the valve plate slide groove has an abutment post, and the lower positioning block is provided with a clearance opening for the abutment post to pass through. When the valve plate moves upward, the abutment post passes through the clearance opening and pushes the driving block upward.

[0014] Preferably, an elastic reset element is provided between the upper positioning block and the driving block.

[0015] Preferably, the abutment post is provided with a fixing ring and an elastic buffer element, the elastic buffer element being located above the fixing ring; when the valve plate moves to the position of fully closed interface, the elastic buffer element is compressed and generates elastic deformation, and its top end elastically abuts against the bottom end of the drive block.

[0016] Preferably, the abutment post is threaded to the bottom of the valve plate groove, and the initial height of the elastic buffer element in the valve plate groove can be adjusted by rotating the abutment post.

[0017] The advantages of this application compared to the prior art are: This application achieves dynamic loading and release of sealing pressure by setting an axially movable floating sealing ring and a sealing pressure regulating component triggered by the valve plate, converting the linear motion of the valve plate into the compression and release of the sealing ring. High sealing pressure is actively applied during closing to ensure absolute sealing; during opening / closing and in the open state, pressure is actively released, greatly reducing frictional resistance and wear. This effectively resolves the contradiction between the low friction required for movement and the high pressure required for sealing in traditional slide gate valves. Attached Figure Description

[0018] Figure 1 This is a perspective view of the multi-layered sealing anti-crystallization wear-resistant slide gate valve of the present invention.

[0019] Figure 2 This is a three-dimensional sectional view of the multi-layered sealing anti-crystallization wear-resistant slide gate valve of the present invention.

[0020] Figure 3 This is a cross-sectional view of the multi-layer sealing anti-crystallization wear-resistant slide gate valve of the present invention along its valve port axial direction.

[0021] Figure 4 This is a cross-sectional view of the multi-layer sealing anti-crystallization wear-resistant slide gate valve of the present invention along the radial direction of its valve port.

[0022] Figure 5 yes Figure 4 A magnified view of part A.

[0023] Figure 6 yes Figure 4 A magnified view of section B.

[0024] Figure 7 This is a three-dimensional exploded view of the sealing pressure regulating component in the multi-layered sealing anti-crystallization wear-resistant slide gate valve of the present invention from a first perspective.

[0025] Figure 8 This is a perspective exploded view of the sealing pressure regulating component in the multi-layered sealing anti-crystallization wear-resistant slide gate valve of the present invention from a second perspective.

[0026] Figure 9 This is an exploded perspective view of the cover plate and valve plate in the multi-layer sealing anti-crystallization wear-resistant slide gate valve of the present invention.

[0027] Figure 10 This is an exploded perspective view of the cover plate and sealing pressure regulating assembly in the multi-layer sealing anti-crystallization wear-resistant slide gate valve of the present invention.

[0028] The following are the labels in the diagram: 1. Cover plate; 11. Interface; 12. Mounting ring groove; 2. Valve plate; 21. Valve port; 3. Cylinder; 4. Floating seal ring; 51. Compression ring; 512. Wavy concave surface; 52. Trigger element; 53. Drive ring; 531. Stepped ring groove; 532. Wavy convex surface; 533. Guide post; 54. Drive block; 541. Guide groove; 55. Upper positioning block; 56. Lower positioning block; 561. Clearance opening; 57. Abutment post; 571. Fixing ring; 58. Elastic reset element; 59. Elastic buffer element. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 4As shown, a multi-layered sealing anti-crystallization wear-resistant slide gate valve includes a pair of opposing cover plates 1, a valve plate 2 movably disposed between the pair of cover plates 1, and a cylinder 3 mounted on the top of the cover plates 1 for driving the valve plate 2. The cover plates 1 are provided with an interface 11, and the valve plate 2 is provided with a valve port 21 that communicates with the interface 11. An annular mounting groove is coaxially formed on the inner side of the interface 11 of the cover plates 1. The slide gate valve also includes: a floating sealing ring 4, which is disposed within the mounting annular groove 12 in a manner that allows it to move axially along the interface 11 of the cover plates 1; and a sealing pressure regulating group. The valve plate 2 includes a clamping ring 51 and a trigger 52. The clamping ring 51 is coaxially and slidably disposed in the mounting ring groove 12 and abuts against the inner side of the floating sealing ring 4. The trigger 52 is disposed on the valve plate 2 and is used to drive the clamping ring 51 to generate axial displacement when the valve is closed. When the valve plate 2 moves to a closed position where its valve port 21 is misaligned with the interface 11 of the cover plate 1, the trigger 52 drives the clamping ring 51 to press against the floating sealing ring 4 axially along the interface 11, so that it is tightly attached to the surface of the valve plate 2 to form an axial seal.

[0031] This slide gate valve mainly consists of a pair of opposing cover plates 1, a valve plate 2 movably disposed between the two cover plates 1, and a cylinder 3 mounted on the top of the cover plates 1 for driving the valve plate 2 to perform opening and closing actions. A process interface 11 is provided on the cover plate 1, and a corresponding valve port 21 is provided on the valve plate 2. Movement of the valve plate 2 can achieve connection or isolation between the valve port 21 and the interface 11. Its core improvement lies in the fact that an annular mounting groove is coaxially machined inside the interface 11 of the cover plate 1.

[0032] The floating seal ring 4 is fitted into the annular mounting groove in a manner that allows axial movement along the interface 11 of the cover plate 1. The floating seal ring 4 has a certain degree of freedom of movement in the uncompressed state, and does not hinder the smooth movement of the valve plate 2.

[0033] The sealing pressure regulating assembly includes a clamping ring 51 and a trigger 52. The clamping ring 51 is coaxially and slidably disposed inside the mounting ring groove 12, with one end always abutting against the inner side of the floating sealing ring 4. The trigger 52 is disposed on the valve plate 2, and its core function is to precisely drive the clamping ring 51 to produce axial displacement during valve closing.

[0034] When the valve plate 2 moves to the fully closed position under the drive of the cylinder 3, that is, when its valve port 21 is completely misaligned with the interface 11 of the cover plate 1, the trigger element 52 provided on the valve plate 2 interacts with the clamping ring 51. This force drives the clamping ring 51 to slide inward along the axial direction of the interface 11, thereby forcefully pressing against the floating sealing ring 4 connected to it. Under the action of axial pressure, the floating sealing ring 4 is forced to press tightly against the sealing surface of the valve plate 2, thereby forming a reliable axial active seal.

[0035] When the valve opens, cylinder 3 drives valve plate 2 to move, aligning valve port 21 on valve plate 2 with interface 11 on cover plate 1 for connection. At this time, trigger 52 separates from or releases the force on clamping ring 51, and the axial clamping force of clamping ring 51 on floating seal ring 4 is released or significantly reduced. Due to its design freedom of movement, floating seal ring 4 minimizes the pressure on the surface of valve plate 2, resulting in minimal frictional resistance during valve plate 2 movement, ensuring flexible, smooth, and low-wear valve opening and closing actions.

[0036] When the valve is closed, cylinder 3 drives valve plate 2 to a position where valve port 21 is completely misaligned with interface 11. During this process, trigger element 52 on valve plate 2 begins to contact and generate relative movement with clamping ring 51 of the sealing pressure regulating assembly. As valve plate 2 reaches its final closed position, trigger element 52 mechanically forces clamping ring 51 to displace axially toward valve plate 2. This displacement of clamping ring 51 is directly converted into axial clamping force on floating sealing ring 4, pressing floating sealing ring 4 tightly against the sealing surface of valve plate 2. At this time, floating sealing ring 4 undergoes elastic deformation under high pressure, tightly filling the microscopic unevenness between the surface of valve plate 2 and the end face of mounting groove, thereby forming a highly reliable main sealing barrier. When the valve is opened, this clamping process is reversed, and the sealing pressure is actively released.

[0037] like Figure 3 As shown, the inner edge of the mounting groove 12 facing the valve plate 2 and the inner edge of the clamping ring 51 are both constructed with mutually cooperating annular conical surfaces. The floating sealing ring 4 is coaxially disposed at the annular conical surface. When the clamping ring 51 is driven to move axially, the annular conical surface of the clamping ring 51 presses against the floating sealing ring 4, driving the floating sealing ring 4 to move along its axial direction and contract radially inward.

[0038] When the valve performs the closing action, the trigger 52 on the valve plate 2 drives the clamping ring 51 to move axially, and the annular conical surface of the clamping ring 51 moves closer to and presses against the floating sealing ring 4 axially.

[0039] Because the floating seal ring 4 is constrained between the annular conical surface of the mounting groove of the cover plate 1 and the annular conical surface of the clamping ring 51, the axial movement of the clamping ring 51 not only applies axial pressure to the seal ring, but also, through this pair of mating conical surface structures, efficiently converts the axial driving force into a radially inward squeezing force on the floating seal ring 4. This combined effect causes the floating seal ring 4 to elastically contract radially inward while tightly adhering to the surface of the valve plate 2 axially. This radial contraction makes the seal ring more tightly fitted in the annular sealing area of ​​the interface 11, further eliminating any possible lateral clearance. Figure 3 As shown, the mounting ring groove 12 has a first conical surface on its inner periphery facing the valve plate 2; the floating sealing ring 4 is sleeved on the first conical surface; the clamping ring 51 has a second conical surface corresponding to the inner edge of the floating sealing ring 4 and cooperating with it; when the clamping ring 51 moves along its axial direction, the first conical surface presses against and drives the floating sealing ring 4 to generate radially inward elastic contraction deformation while generating axial displacement.

[0040] When the valve is open or in motion, the clamping ring 51 is not driven, the floating sealing ring 4 is in its initial position, and maintains slight contact or a very small gap with the surface of the valve plate 2, resulting in extremely low friction.

[0041] When the valve begins to close, the valve plate 2 moves until its trigger 52 interacts with the clamping ring 51. Driven by the trigger 52, the clamping ring 51 undergoes precise displacement along its axial direction (i.e., towards the valve plate 2). At this time, the second conical surface of the clamping ring 51 advances axially. Since the floating sealing ring 4 is already fitted onto the first conical surface fixed to the cover plate 1, the second conical surface of the clamping ring 51 does not directly and rigidly push the sealing ring during axial movement, but rather forms a spatially coordinated compression relationship with the first conical surface.

[0042] Driven by the axial displacement of the clamping ring 51, the floating sealing ring 4 is stably pressed against the first conical surface. Under the guidance and constraint of the inclined surface of the first conical surface, the floating sealing ring 4 gains axial displacement, thereby tightly fitting the surface of the valve plate 2. At the same time, its material is subjected to the squeezing action of the first conical surface, forcing it to produce radially inward, uniform elastic contraction deformation. This process efficiently transforms the axial driving force of the clamping ring 51 into a composite sealing force that enables the sealing ring to simultaneously achieve axial adhesion and radial clamping through the guidance of the fixed conical surface.

[0043] like Figure 5 , Figures 9 to 10As shown, the sealing pressure regulating assembly further includes a drive ring 53 coaxially mounted in the mounting ring groove 12, and a drive block 54 slidably disposed between the two valve plates 2 and connected to the drive ring 53 in a driving direction; wherein, the drive ring 53 has a stepped ring groove 531 at one end facing the valve plate 2, and the clamping ring 51 is coaxially disposed in the stepped ring groove 531, and the two are coupled and driven by a mutually cooperating inclined structure; the trigger 52 includes a vertical slide groove on the valve plate 2 for the drive block 54 to slide. When the valve plate 2 moves upward, the bottom of the slide groove pushes the drive block 54 upward, thereby driving the drive ring 53 to rotate, and driving the clamping ring 51 to move axially through the inclined structure.

[0044] The drive ring 53 has a wavy convex surface 532 continuously distributed along its circumference on one end face facing the valve plate 2, and the clamping ring 51 has a wavy concave surface 512 that meshes with the wavy convex surface 532 on the corresponding end face facing the drive ring 53. When the drive ring 53 is driven to rotate, its wavy convex surface 532 drives the clamping ring 51 to move along its axial direction through the meshing action with the wavy concave surface 512, thereby causing the clamping ring 51 to press the floating sealing ring 4.

[0045] When the valve opening process ends or the closing process begins, the valve plate 2 is in a lower position, the drive block 54 is located at the lower part of the slide groove under its own gravity or the action of the reset mechanism, the drive ring 53 is in the initial angle position, at this time the wave-shaped meshing surface is in the "trough" corresponding state, the clamping ring 51 is in the final axial position, and there is no clamping force or the pressure on the floating sealing ring 4 is minimal.

[0046] When the valve needs to be closed, cylinder 3 drives valve plate 2 to move upward. During the upward movement of valve plate 2, the bottom of the vertical groove on valve plate 2 begins to contact and push drive block 54 upward. The upward movement of drive block 54 drives drive ring 53 to rotate precisely about its axis through its transmission connection with drive ring 53 (e.g., drive block 54 has a rack or pin that meshes with gears or helical grooves on the outer periphery of drive ring 53).

[0047] The rotation of the drive ring 53 is converted into linear motion of the pressure ring 51 along its axis through the meshing action between the wavy convex surface 532 on its end face and the wavy concave surface 512 on the end face of the pressure ring 51. As the drive ring 53 rotates, its wavy convex surface 532 acts as a helical inclined surface, pushing the meshing pressure ring 51's wavy concave surface 512, forcing the pressure ring 51 to produce a smooth and continuous displacement along the axial direction of the mounting ring groove 12 (i.e., toward the sealing surface of the valve plate 2).

[0048] The axial displacement of the clamping ring 51 transmits force to the floating seal ring 4 through its second conical surface. Under the constraint and guidance of the first conical surface, the floating seal ring 4 is pushed by the clamping ring 51. While generating axial displacement to fit tightly against the surface of the valve plate 2, it is also subjected to radial inward elastic contraction deformation by the compression of the first conical surface. Thus, when the valve plate 2 reaches the fully closed position, a highly reliable composite seal composed of axial compression and radial engagement has been established.

[0049] When the valve is opened, the process is reversed. The valve plate 2 moves downward, the upper part of the slide pushes or the reset mechanism causes the drive block 54 to move downward, the drive ring 53 rotates in the opposite direction, the wave-shaped meshing surface guides the clamping ring 51 to retract axially, the sealing pressure is actively and smoothly released, the floating sealing ring 4 returns to its original position under the action of elastic restoring force, and the movement resistance of the valve plate 2 is reduced to the minimum.

[0050] like Figure 10 As shown, the inner circumference of the clamping ring 51 is splined with the inner wall of the mounting ring groove 12.

[0051] During valve operation, when the drive ring 53 drives the clamping ring 51 to generate axial displacement through the wavy convex surface 532 on its end face, the spline teeth on the inner circumference of the clamping ring 51 and the corresponding spline groove on the inner wall of the mounting ring groove 12 always maintain a tight engagement. The spline connection can avoid the tendency of the clamping ring 51 to rotate with the drive ring 53 under the action of the tangential component force of the wavy convex surface 532, ensuring that the rotational motion of the drive ring 53 can be converted into the pure axial linear motion of the clamping ring 51, eliminating energy loss and motion uncertainty caused by relative sliding or rotation.

[0052] like Figure 5 As shown, the drive ring 53 is provided with a guide post 533 extending along its axial direction, and the drive block 54 is provided with a guide groove 541 extending in a direction perpendicular to the movement direction of the valve plate 2. The guide post 533 extends into the guide groove 541 and slides in cooperation with it.

[0053] When the valve plate 2 moves linearly to open or close under the drive of the cylinder 3, its vertical groove pushes the drive block 54 to slide vertically in the same direction as the valve plate 2. Since the direction of the guide groove 541 on the drive block 54 is perpendicular to the direction of movement of the valve plate 2 (usually horizontal), and the guide post 533 on the drive ring 53 slides in the guide groove 541, the drive block 54 is directly driven by the valve plate 2 to move vertically up and down.

[0054] When the drive block 54 moves vertically, the guide groove 541 on it also moves up and down. Since the guide post 533 is fixed on the drive ring 53 and inserted into the guide groove 541, the up and down movement of the guide groove 541 will exert a force on the guide post 533 through its groove wall.

[0055] Because the guide groove 541 is horizontal, when it undergoes vertical displacement relative to the fixed axial guide post 533, the guide groove 541 forces a relative horizontal displacement tendency between the drive block 54 and the drive ring 53. However, since the drive ring 53 is restricted to rotating only around its axis (usually achieved through a bearing or rotational fit with the mounting groove), and the drive block 54 is constrained to sliding only vertically, this constraint converts the relative motion between the guide groove 541 and the guide post 533 into the rotational motion of the drive ring 53 around its axis. The vertical linear motion of the drive block 54 is efficiently and smoothly converted into the rotational motion of the drive ring 53 through the sliding pair of the guide post 533 and the guide groove 541.

[0056] like Figure 5 and Figure 6 As shown, the sealing pressure regulating assembly also includes an upper positioning block 55 and a lower positioning block 56 disposed between the two valve plates 2. The driving block 54 is slidably disposed between the upper positioning block 55 and the lower positioning block 56. The bottom end of the sliding groove of the valve plate 2 has an abutment post 57. The lower positioning block 56 is provided with a clearance opening 561 for the abutment post 57 to pass through. When the valve plate 2 moves upward, the abutment post 57 passes through the clearance opening 561 and pushes the driving block 54 upward.

[0057] When the valve is in the open position, the valve plate 2 is in the lower position. At this time, the abutment post 57 at the bottom of the valve plate 2 slide groove is located below the clearance opening 561 of the lower positioning block 56.

[0058] When the valve closes, cylinder 3 drives valve plate 2 to move upward. As valve plate 2 rises, the abutment post 57 at the bottom of its groove moves upward as well. During a specific phase of valve plate 2's rise, the abutment post 57 passes through the clearance opening 561 on the lower positioning block 56 and contacts the lower end face of the drive block 54 located above it. As valve plate 2 continues to move upward, the abutment post 57 continuously pushes the drive block 54 upward, forcing the drive block 54 to overcome possible resistance and slide upward along the vertical guide surfaces provided by the upper positioning block 55 and the lower positioning block 56.

[0059] As described above, the upward sliding of the drive block 54, through the sliding engagement of its guide groove 541 with the guide post 533 on the drive ring 53, converts the vertical linear motion into the rotational motion of the drive ring 53. The rotation of the drive ring 53 then drives the clamping ring 51 to axially press through the engagement of the wave-shaped end face, ultimately completing the pressure sealing process of the floating sealing ring 4.

[0060] like Figure 5 and Figure 6 As shown, an elastic reset element 58 is provided between the upper positioning block 55 and the driving block 54.

[0061] During valve closing, when valve plate 2 moves upward, its abutment post 57 passes through the clearance opening 561 of lower positioning block 56 and pushes upward onto drive block 54, drive block 54 overcomes the elastic force (e.g., the resistance of a compression spring) of elastic reset element 58 and slides upward. At this time, elastic reset element 58 is compressed, storing elastic potential energy.

[0062] During valve opening, when valve plate 2 moves downward and its abutment post 57 disengages from drive block 54 or the downward force is released, the elastic potential energy stored in the compressed elastic reset element 58 is released. The rebound force generated by this element acts on drive block 54, and drive block 54 automatically slides downward along the vertical guides provided by upper positioning block 55 and lower positioning block 56 until it returns to its initial preset position. The downward reset of drive block 54, through the cooperation of its guide groove 541 and the guide post 533 of drive ring 53, drives drive ring 53 to rotate in the opposite direction, and then through the engagement of the wavy end face, causes clamping ring 51 to retract axially, ultimately realizing the active release of sealing pressure on floating sealing ring 4.

[0063] like Figure 6 As shown, the abutment post 57 is provided with a fixing ring 571 and an elastic buffer element 59 on its post body. The elastic buffer element 59 is located above the fixing ring 571. When the valve plate 2 moves to the position of fully closing the interface 11, the elastic buffer element 59 is compressed and produces elastic deformation, and its top end elastically abuts against the bottom end of the drive block 54.

[0064] In the final stage of the valve closing action, when the valve plate 2 continues to move upward under the drive of the cylinder 3 and reaches the fully closed position where its valve port 21 is completely misaligned with the interface 11 of the cover plate 1, the abutment post 57 rises with the valve plate 2. At this time, the abutment post 57 has contacted the bottom end of the drive block 54 through the elastic buffer element 59 above it.

[0065] As the valve plate 2 continues to move towards its final closed position, the rising of the abutment post 57 compresses the elastic buffer element 59 above the fixed ring 571 between the fixed ring 571 and the bottom end of the drive block 54, thereby generating controllable elastic deformation. During this process, the drive block 54 has essentially reached its top dead center, and the corresponding sealing pressure has been initially established. Compression continues until the valve plate 2 reaches the mechanically set fully closed position. In this final state, the top end of the elastic buffer element 59 elastically abuts against the bottom end of the drive block 54 under compression. Even when the valve plate 2 is fully in place, the abutment post 57 maintains a continuous, flexible thrust on the drive block 54 through the elastic buffer element 59.

[0066] like Figure 6As shown, the abutment post 57 is threadedly connected to the bottom of the groove of the valve plate 2. The initial height of the elastic buffer element 59 in the groove of the valve plate 2 can be adjusted by rotating the abutment post 57.

[0067] During valve assembly, commissioning, or maintenance, technicians can rotate the abutment column 57 using specialized tools. When the abutment column 57 is screwed into the bottom of the slide groove, the retaining ring 571 on its body and the elastic buffer element 59 above it are lowered relative to the valve plate 2; conversely, when the abutment column 57 is screwed out, it is raised relative to the valve plate 2. This adjustment directly changes the initial gap (or preload) between the top of the elastic buffer element 59 and the bottom of the drive block 54 when the valve plate 2 is in the open or initial position.

[0068] After adjustment, when the valve is operating normally, as mentioned earlier, the valve plate 2 moves upward to close. Since the initial height of the abutment post 57 has been precisely set, after the valve plate 2 has moved a specific stroke, the elastic buffer element 59 above the abutment post 57 will begin to contact and push the drive block 54 at the expected and optimal position. This ensures optimal synchronization between the sealing pressure adjustment action and the main stroke of the valve plate 2.

[0069] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A multi-layered sealing anti-crystallization wear-resistant slide gate valve, comprising a pair of opposing cover plates, a valve plate movably disposed between the pair of cover plates, and a cylinder mounted on the top of the cover plates for driving the valve plate, wherein the cover plates are provided with an interface, and the valve plate is provided with a valve port capable of communicating with the interface, characterized in that, The cover plate has an annular mounting groove coaxially formed on the inner side of the interface, and the slide valve also includes: A floating sealing ring is disposed in the mounting ring groove in a manner that allows it to move axially along the cover plate interface; A sealing pressure regulating assembly includes a clamping ring and a trigger. The clamping ring is coaxially and slidably disposed in the mounting ring groove and abuts against the inner side of the floating sealing ring. The trigger is disposed on the valve plate and is used to drive the clamping ring to generate axial displacement when the valve is closed. When the valve plate moves to a closed position where its valve port and the cover plate interface are misaligned, the trigger drives the clamping ring to press against the floating sealing ring along the interface axially, so that it is tightly attached to the surface of the valve plate to form an axial seal.

2. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 1, characterized in that, The inner edge of the mounting ring groove facing the valve plate and the inner edge of the corresponding clamping ring are both constructed with mutually cooperating annular conical surfaces. The floating sealing ring is coaxially disposed at the annular conical surface. When the clamping ring is driven to move axially, the annular conical surface of the clamping ring presses against the floating sealing ring, driving the floating sealing ring to move along its axial direction and contract radially inward.

3. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 2, characterized in that, The mounting ring groove has a first conical surface on its inner periphery facing the valve plate; the floating sealing ring is fitted on the first conical surface; the clamping ring has a second conical surface corresponding to the inner edge of the floating sealing ring and cooperating with it; when the clamping ring moves along its axial direction, the second conical surface presses against and drives the floating sealing ring to generate radially inward elastic contraction deformation while generating axial displacement.

4. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 3, characterized in that, The sealing pressure regulating assembly also includes a drive ring coaxially mounted in the mounting ring groove, and a drive block slidably disposed between the two valve plates in the vertical direction and connected to the drive ring in a driving connection. The drive ring has a stepped annular groove at one end facing the valve plate, and the clamping ring is coaxially disposed in the stepped annular groove. The two are coupled and driven by a mutually cooperating inclined surface structure. The trigger includes a vertical groove formed on the valve plate for the drive block to slide. When the valve plate moves upward, the bottom of the groove pushes the drive block upward, thereby driving the drive ring to rotate, and the inclined structure drives the clamping ring to move axially.

5. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 4, characterized in that, The inner circumference of the clamping ring is splined with the inner wall of the mounting ring groove.

6. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 4 or 5, characterized in that, The drive ring is provided with a guide post extending along its axial direction, and the drive block is provided with a guide groove extending in a direction perpendicular to the movement direction of the valve plate. The guide post extends into the guide groove and slides in cooperation with it.

7. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 6, characterized in that, The sealing pressure regulating assembly also includes an upper positioning block and a lower positioning block disposed between the two valve plates. The driving block is slidably disposed between the upper positioning block and the lower positioning block. The bottom end of the valve plate slide groove has an abutment post. The lower positioning block is provided with a clearance opening for the abutment post to pass through. When the valve plate moves upward, the abutment post passes through the clearance opening and pushes the driving block upward.

8. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 7, characterized in that, An elastic reset element is provided between the upper positioning block and the driving block.

9. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 7, characterized in that, The abutment post is provided with a fixing ring and an elastic buffer element, with the elastic buffer element located above the fixing ring. When the valve plate moves to the position of a completely closed interface, the elastic buffer element is compressed and undergoes elastic deformation, with its top end elastically abutting against the bottom end of the drive block.

10. The multi-layer sealing anti-crystallization wear-resistant slide gate valve according to claim 8, characterized in that, The abutment post is threaded to the bottom of the valve plate groove, and the initial height of the elastic buffer element in the valve plate groove can be adjusted by rotating the abutment post.

Images