Sliding structure of valve plate

Abstract

A valve plate sliding structure, including a valve body, the valve body is provided with opening and closing cavity, the opening and closing cavity is provided with the valve plate connected with valve stem, the valve plate is driven by the valve stem and moves up and down in the opening and closing cavity, the valve body is provided with guide assembly in the opening and closing cavity both sides symmetry, the guide assembly is integrally formed in the opening and closing cavity, the both sides of the valve plate correspond to each other's guide assembly is provided with the sliding slot for the guide assembly moves in it.The beneficial effects of the utility model are: through integrally forming the guide assembly in the opening and closing cavity, the cumbersome operation and high precision requirement of prior art rear-mounted guide rail are eliminated, the guide rail deviation problem caused by space limitation or human error is avoided, so that the installation process is simplified and the maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to a moving structure of a valve plate within a valve body, and more particularly to a sliding structure of a valve plate. Background Technology

[0002] Gate valves, as a key fluid control device, are widely used in industrial pipelines such as oil and gas transportation, chemical production, and water treatment systems. They are mainly used to isolate or regulate the flow of high-pressure, high-flow media. During operation, the gate valve moves the valve stem up and down by rotating the handwheel or driving the actuator, causing the valve plate to rise and fall under the guidance of the guide rails within the valve body. When the valve plate is raised to the high position, the fluid passage is opened, allowing the medium to flow; when the valve plate descends to the valve seat, a sealing interface is formed, blocking the fluid flow. This design is simple in structure, has good sealing performance, and is suitable for frequent switching and harsh environments, such as in pump station isolation or emergency shut-off scenarios where rapid response and high reliability are required. During installation, gate valves are usually integrated into the piping network, requiring the valve body to be connected to the pipeline flange, and the smooth movement of the valve plate is ensured by the internal guide rails to maintain system efficiency.

[0003] However, existing gate valve technology has significant drawbacks, primarily in the installation method of the guide rail. The guide rail needs to be installed into the valve body's chamber after installation, a process that is cumbersome and requires high precision. During installation, space constraints or human error can easily cause the guide rail to shift position. Furthermore, during long-term operation, fluid impact, vibration, or thermal deformation can cause the guide rail to misalign, leading to jamming or seizing of the valve plate during lifting and lowering. This not only affects the valve's normal opening and closing function but also reduces system reliability, increases maintenance frequency and costs, and may even cause unexpected shutdowns. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sliding structure for valve plates that reduces the difficulty of guide rail installation and maintenance, and improves valve reliability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sliding structure for a valve plate, comprising a valve body, wherein an opening and closing cavity is provided within the valve body, and a valve plate connected to a valve stem is provided within the opening and closing cavity. The valve plate moves up and down within the opening and closing cavity under the drive of the valve stem. Guide components are symmetrically arranged on both sides of the valve body within the opening and closing cavity, and the guide components are integrally formed within the opening and closing cavity. Slide grooves are provided on both sides of the valve plate corresponding to their respective guide components, allowing the guide components to move within them.

[0006] The beneficial effects of this utility model are as follows: By integrally molding the guide component within the opening and closing cavity, the cumbersome operation and high-precision requirements of retrofitting guide rails in existing technologies are eliminated. This avoids guide rail misalignment caused by space limitations or human error, thus simplifying the installation process and reducing maintenance frequency. During long-term operation, the integrated structure effectively resists the effects of fluid impact, vibration, or thermal deformation, preventing guide rail misalignment, ensuring smooth valve plate lifting and lowering, and preventing jamming or stuck phenomena. This significantly improves the reliability of the valve's opening and closing function and system stability, reducing the risk of unexpected downtime and maintenance costs. As a preferred approach, the guide component can be integrally molded during valve body casting. For example, the internal cavity of the valve body can be designed as an integral structure with a fixed protrusion. The protrusion serves as the base of the guide component and is directly formed during the casting process, eliminating the need for subsequent assembly. When the valve plate moves, the protrusion directly engages with the sliding groove, resisting external impacts through the rigid support of the valve body and reducing the risk of deformation. As another preferred approach, the guide assembly can be integrally fixed to the valve body wall by welding. For example, welding points can be pre-placed on both sides of the opening and closing chamber, and the guide assembly substrate can be welded into place to form a seamless integral connection. In this solution, the welding points evenly distribute the load during valve operation, preventing displacement caused by thermal deformation and ensuring the stability of the guide rail position. These implementation methods are all based on the principle of integral molding, which strengthens the overall structural integrity and improves the anti-interference capability.

[0007] Furthermore, the guide assembly includes a guide rail that cooperates with the slide groove to prevent the valve plate from swinging. The guide rail includes a main body and a guide part. When the valve plate moves from the closed state to the open state, the slide groove gradually cooperates with the main body through the guide part.

[0008] By designing the main body and guide section of the guide rail, a gradual engagement between the groove and the guide section is achieved during valve plate movement, effectively preventing jamming and providing smooth guidance for valve plate lifting and lowering, avoiding impact or deviation caused by sudden contact. In the initial stage of valve plate opening, this structure guides the groove into the guide section, reducing initial frictional resistance and ensuring continuous and smooth movement. The main body provides stable support, preventing valve plate swaying, thereby reducing the risk of jamming and improving the reliability and lifespan of valve operation. As a preferred approach, the guide section can be designed as an inclined transition slope, such as a wedge-shaped structure that gradually thickens from thin to thick at the front end of the guide rail. When the valve plate starts from the closed state, the groove first contacts this inclined surface and gradually slides into the straight track of the main body as it moves. This structure, through the guiding effect of the inclined surface, disperses contact pressure, reduces local stress concentration, and achieves a smooth transition without jamming. As another preferred approach, the guide section can be integrated into the end of the guide rail to form a gradually changing profile, such as using a conical or arc-shaped front end. When the slide engages with the valve plate during movement, the changing profile gradually increases the mating area, avoiding instantaneous impact. Under high-frequency valve operation, this solution reduces vibration through gradual force transmission, ensuring precise alignment between the guide rail and the slide, and preventing swaying and deviation.

[0009] Furthermore, the guide portion is an arc surface, and the guide portion gradually engages with the slide groove as the valve plate moves from the closed state to the open state.

[0010] Designing the guide section as an arc surface and gradually engaging with the slide groove during valve plate opening further optimizes movement guidance, reduces contact impact, and improves the smoothness and durability of valve operation. The arc surface structure provides continuous curved guidance upon contact with the slide groove, avoiding wear or jamming caused by sharp edges and ensuring a smooth transition of the valve plate from rest to movement. Simultaneously, the gradual engagement mechanism disperses force loads, reduces the impact of thermal deformation or vibration, and effectively prevents guide rail misalignment and valve plate jamming. As a preferred approach, the arc surface can adopt a circular arc profile; for example, the guide section of the guide rail can be designed as a raised arc, with the slide groove correspondingly designed as a groove. When the valve plate opens, the edge of the groove slides along the arc, fully conforming to the main body as the movement depth increases. This structure reduces sliding friction through the rolling contact principle of the arc, guiding the valve plate into the working position without resistance. As another preferred approach, the guide section can be designed as a combination of multiple arc surfaces. For example, a segmented arc transition can be used at the front end of the guide rail, with each segment having a gradually changing arc. In the initial stage of valve plate movement, it first contacts the small arc section and gradually transitions to the large arc. Under fluid impact, this solution absorbs energy through multiple segments, maintains the stability of the fit, and avoids jamming caused by instantaneous displacement.

[0011] Furthermore, the guide assembly also includes a stop rib, the guide portion is disposed on the stop rib, and the stop rib cooperates with the outer diameter surface of the valve plate when the guide rail is disengaged from the contact between the guide rail and the slide groove to prevent the valve plate from swinging.

[0012] Adding a stop rib that engages with the outer diameter surface of the valve plate when the guide rail disengages effectively prevents the valve plate from swaying during movement. This provides additional support, especially during non-engaging phases (such as opening or closing critical points), ensuring the stability and reliability of valve operation. The stop rib functions immediately when the guide rail disengages from the slide groove, limiting radial movement by contacting the outer diameter surface of the valve plate and preventing swaying caused by fluid impact or vibration. Simultaneously, during movement, the main body engages with the slide groove to prevent swaying, forming a double protection, reducing the risk of jamming and extending service life. As a preferred design, the stop rib can be designed as an L-shaped boss structure, for example, a vertical platform extending from the outer side of the guide rail main body. The platform surface is flat, and when the guide rail disengages from the slide groove, the platform directly contacts the circular outer diameter of the valve plate. This structure disperses external forces through surface contact, absorbing vibration energy during high-frequency valve operation and maintaining the stability of the valve plate's center position. As another preferred approach, the abutment rib can be integrated into the base of the guide component. For example, a stepped protrusion integrally formed with the valve body can be used, with the height of the protrusion slightly higher than the guide rail. When the contact is broken, the protrusion presses against the outer surface of the valve plate. In the case of thermal deformation, this solution compensates for displacement through rigid support, preventing sealing failure caused by swaying.

[0013] Furthermore, the end face of the abutment rib corresponding to the valve plate is a vertical surface, and a clearance fit is formed between the quadrant point of the valve plate along the radial direction and the abutment rib.

[0014] Designing the abutment rib end face as a vertical surface and forming a clearance fit with the valve plate provides slight oscillation space, avoiding jamming or wear caused by rigid contact, while retaining necessary limiting functions to ensure the valve's adaptability under extreme operating conditions. The vertical end face provides a stable support surface upon contact, and the clearance fit allows the valve plate to wobble slightly within tolerances, absorbing vibration or thermal expansion stress and preventing increased frictional resistance or component damage due to overtight fits; this improves the valve's durability and maintenance intervals during long-term operation. As a preferred method, the clearance fit can be achieved by setting tiny grooves on the vertical surface of the abutment rib, with corresponding protrusions on the valve plate's outer diameter, forming a non-contact clearance; this structure provides space between the grooves and protrusions when the valve plate oscillates, buffering external forces through air damping principles and avoiding hard impacts. As another preferred method, the vertical end face can be designed as a plane with an elastic coating, such as wear-resistant rubber, with the coating thickness forming a gap; when the valve plate contacts, the coating compresses and absorbs energy; this solution provides buffering under fluid impact through elastic deformation, ensuring the dynamic adaptability of the clearance fit. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the valve plate in an embodiment of this utility model;

[0016] Figure 2 This is a side view of the valve plate in an embodiment of the present utility model;

[0017] Figure 3 This is an enlarged view of the guide component according to an embodiment of the present utility model;

[0018] Figure 4 This is a partial cross-sectional view of the cooperation between the abutment rib and the valve plate in an embodiment of this utility model. Detailed Implementation

[0019] An embodiment of this utility model provides a sliding structure for a valve plate, as follows: Figure 1-4As shown: The valve includes a valve body 1, within which an opening / closing chamber 2 is provided. A valve plate 3 and a valve stem 4 are installed within the opening / closing chamber 2. The valve stem 4 is fixedly connected to the valve plate 3. Driven by the valve stem 4, the valve plate 3 moves vertically up and down within the opening / closing chamber 2, thus achieving the valve's opening and closing function. Guide components 5 are symmetrically arranged on both sides of the valve body 1 within the opening / closing chamber 2. The guide components 5 are integrally formed on the inner wall of the opening / closing chamber 2, requiring no additional installation and reducing subsequent maintenance difficulty. Sliding grooves 6 are provided on both sides of the valve plate 3 corresponding to the guide components 5. The sliding grooves 6 have a recessed structure, allowing the guide components 5 to slide within them. The guide components 5 include a guide rail 51 and abutment ribs 52. The guide rail 51 includes a main body 511 and a guide part 512, with the guide part 512 having a smooth arc surface structure. The guide part 512 is fixedly positioned above the abutment rib 52, and the end face of the abutment rib 52 corresponding to the valve plate 3 is designed as a vertical surface. A gap is formed between the radial quadrant point of the valve plate 3 and the abutment rib 52. The gap is a small gap, which allows the valve plate 3 to have a slight swing space.

[0020] When the valve plate 3 moves from the closed state to the open state, the slide groove 6 first contacts the arc surface of the guide portion 512, and gradually slides into the main body portion 511 under the guidance of the arc surface, preventing jamming and ensuring smooth movement. During the movement of the valve plate 3, the main body portion 511 and the slide groove 6 are tightly fitted, limiting the swing of the valve plate 3. When the guide rail 51 disengages from the slide groove 6, the vertical end face of the abutment rib 52 contacts the outer diameter surface of the valve plate 3, providing support to prevent the valve plate 3 from swinging. The clearance setting allows the valve plate 3 to wobble slightly during operation, avoiding wear caused by rigid contact.

[0021] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A sliding structure for a valve plate, comprising a valve body, wherein an opening and closing chamber is provided within the valve body, and a valve plate connected to a valve stem is disposed within the opening and closing chamber, the valve plate moving up and down within the opening and closing chamber under the action of the valve stem, characterized in that: The valve body has guide components symmetrically arranged on both sides of the opening and closing cavity. The guide components are integrally formed in the opening and closing cavity. The valve plate has sliding grooves on both sides corresponding to the respective guide components, allowing the guide components to move within them.

2. The sliding structure of a valve plate according to claim 1, characterized in that: The guide assembly includes a guide rail that cooperates with the slide to prevent the valve plate from swinging. The guide rail includes a main body and a guide part. When the valve plate moves from the closed state to the open state, the slide gradually cooperates with the main body through the guide part.

3. The sliding structure of a valve plate according to claim 2, characterized in that: The guide portion is an arc surface, and it gradually engages with the slide groove as the valve plate moves from the closed state to the open state.

4. The sliding structure of the valve plate according to claim 2, characterized in that: The guide assembly also includes a stop rib, and the guide portion is disposed on the stop rib. When the guide rail is disengaged from the contact between the guide rail and the slide groove, the stop rib cooperates with the outer diameter surface of the valve plate to prevent the valve plate from swinging.

5. The sliding structure of a valve plate according to claim 4, characterized in that: The end face of the abutment rib corresponding to the valve plate is a vertical surface, and the quadrant point of the valve plate along the radial direction forms a clearance fit with the abutment rib.

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