Protection mechanism for gate valve sealing ring

Abstract

The utility model relates to the technical field of vacuum furnace sealing, in particular to a protection mechanism for a gate valve sealing ring, which comprises a baffle and a support pulley, the baffle is of a plate-shaped structure with the cross section consisting of a contact plate and an L-shaped plate, the joint of the contact plate and one end of the L-shaped plate is rotatably mounted on a movable valve, and the support pulley is mounted on the movable valve. When the movable valve is in an upper limit position state, the turning angle at the other end of the L-shaped plate covers the O-shaped sealing ring arranged on the side surface of the movable valve; the lower portion of the contact plate of the baffle is attached to the top of the supporting pulley, so that the turning angle of the L-shaped plate is gradually exposed out of the O-shaped sealing ring till the movable valve reaches the lower limit position, and the turning angle of the L-shaped plate does not shield the O-shaped sealing ring any more. According to the protection mechanism for the gate valve sealing ring, the sealing ring can be effectively prevented from aging due to high-temperature radiation, the service life of the sealing ring is remarkably prolonged, and the sealing performance and reliability of a gate valve are improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum furnace sealing technology, specifically to a protective mechanism for the sealing ring of a slide gate valve. Background Technology

[0002] During the operation of a vacuum continuous furnace, effective isolation between chambers is crucial for maintaining the vacuum environment within the furnace and ensuring the stability of the process and product quality. Currently, slide gate valves (pull-up type) are widely used for isolation between chambers in vacuum continuous furnaces due to their simple structure and ease of operation.

[0003] However, existing slide gate valves reveal a pressing problem in practical use. During the opening and closing process, the sealing ring on the valve plate is inevitably exposed to direct heat radiation from the moving workpiece. Due to the high operating temperature inside the vacuum furnace, this continuous heat radiation causes the sealing ring temperature to rise sharply, leading to aging of the sealing ring material. After aging, the elasticity and sealing performance of the sealing ring significantly decrease, not only affecting the sealing effect of the slide gate valve and causing a decrease in the vacuum level inside the furnace, but also potentially causing gas leaks and other problems, seriously affecting the normal operation of the vacuum continuous furnace and product quality. Furthermore, frequent replacement of aged sealing rings increases equipment maintenance costs and downtime, reducing production efficiency.

[0004] Specifically, during the operation of the slide gate valve, the movable valve moves up and down and is sealed with an O-ring by the valve body. The O-ring is placed on the movable valve. However, when the movable valve moves up and down, the O-ring lacks effective protection and is directly exposed to the heat radiation of the moving workpiece, thus accelerating its aging process and shortening its service life.

[0005] Therefore, developing a mechanism that can effectively protect the sealing ring of the slide gate valve and prevent it from aging due to high-temperature radiation is of great practical significance. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a protective mechanism for the sealing ring of a slide gate valve. This protective mechanism can effectively prevent the sealing ring from aging due to high-temperature radiation, significantly extend the service life of the sealing ring, improve the sealing performance and reliability of the slide gate valve, and thus ensure the normal operation of the vacuum continuous furnace and product quality.

[0007] The technical solution of this utility model is as follows:

[0008] A protective mechanism for the O-ring seal of a slide gate valve is provided on the movable valve and valve body of the slide gate valve. It includes a baffle and a support pulley. The baffle is a plate-shaped structure with a cross-section consisting of a contact plate and an "L"-shaped plate. The contact plate and the "L"-shaped plate are rotatably mounted on the movable valve at one end. When the movable valve is in its upper limit position, the bend angle at the other end of the "L"-shaped plate covers the O-ring seal located on the side of the movable valve. A support pulley is fixedly installed on the valve body. During the descent of the movable valve, the lower part of the contact plate of the baffle abuts against the top of the support pulley, causing the bend angle of the "L"-shaped plate to gradually expose the O-ring seal until the movable valve reaches its lower limit position. At this point, the bend angle of the "L"-shaped plate no longer obscures the O-ring seal, and the bottom of the baffle slides horizontally on the support pulley until the O-ring seal is tightly against the side of the valve body.

[0009] The baffle is mounted on the movable valve on both sides via a rotating shaft.

[0010] The support pulley is fixedly mounted on the valve body via a bracket.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model discloses a protective mechanism for the sealing ring of a slide gate valve. This protective mechanism can effectively protect the sealing ring from high-temperature radiation: when the movable valve is in the upper limit position, the turning angle of the "L"-shaped plate will cover the O-ring sealing ring set on the side of the movable valve inside. At this time, the baffle forms a protective barrier, which can block the direct heat radiation emitted by the moving workpiece, and avoid the O-ring sealing ring being affected by high temperature during the lifting and lowering of the slide gate valve, thereby effectively preventing the sealing ring from aging due to heat and greatly extending the service life of the sealing ring.

[0013] 2. This utility model discloses a protective mechanism for the sealing ring of a slide gate valve. This protective mechanism ensures the sealing performance of the valve when it is closed. During the descent of the movable valve, the lower part of the contact plate of the baffle is attached to the top of the support pulley. As the movable valve continues to descend, the turning angle of the "L"-shaped plate gradually exposes the O-ring seal. When the movable valve reaches the lower limit position, the turning angle of the "L"-shaped plate no longer obstructs the O-ring seal. At the same time, the bottom of the baffle slides horizontally on the support pulley, so that the O-ring seal is tightly attached to the side of the valve body. This design ensures that the O-ring seal can fully exert its sealing function when the valve is closed, ensuring the sealing performance of the slide gate valve, preventing gas leakage in the furnace, and maintaining the vacuum environment in the furnace.

[0014] 3. This utility model discloses a protective mechanism for the sealing ring of a slide gate valve. The mechanism has a reasonable structural design and smooth movement: the baffle is mounted on the movable valve via rotating shafts on both sides. This rotatable mounting method allows the baffle to move flexibly. During the raising and lowering of the movable valve, the baffle can automatically adjust its posture according to the position of the movable valve, achieving effective protection and timely exposure of the O-ring seal. The supporting pulley is fixedly mounted on the valve body via a bracket, providing stable support and guidance for the movement of the baffle. During the lowering of the movable valve, the contact and relative sliding between the baffle and the supporting pulley are smooth, ensuring the stability of the entire protective mechanism's movement, reducing friction and wear during movement, and improving the reliability and service life of the mechanism.

[0015] 4. The present invention discloses a protective mechanism for the sealing ring of a slide gate valve. This protective mechanism is easy to operate and does not affect the normal opening and closing of the valve. The protective mechanism fits tightly with the movable valve and valve body of the slide gate valve. During the normal lifting and lowering opening and closing process of the slide gate valve, it can automatically realize the protection and sealing function of the O-ring seal without additional operating steps, without increasing the workload of the operator, and without affecting the normal opening and closing speed and efficiency of the slide gate valve. Attached Figure Description

[0016] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0017] In the attached diagram:

[0018] Figure 1 This is a front view of a protective mechanism for a gate valve sealing ring according to an embodiment of the present invention;

[0019] Figure 2 This is a side view of the movable valve in the raised state of a protective mechanism for the sealing ring of a slide gate valve according to an embodiment of the present invention.

[0020] Figure 3 This is a side view of the movable valve in the lowered position of a protective mechanism for the sealing ring of a slide gate valve, according to an embodiment of the present invention.

[0021] Figure 4 This is a side view of the movable valve in the pressed-in position of a protective mechanism for the sealing ring of a slide gate valve, according to an embodiment of the present invention.

[0022] The components represented by the various reference numerals in the diagram are:

[0023] This utility model comprises: 1. a movable valve; 2. a baffle; 3. a supporting pulley; 4. a valve body; 5. a bracket; 6. an O-ring seal; and 7. a rotating shaft. Detailed Implementation

[0024] like Figures 1 to 4 As shown, the protection mechanism for the sealing ring of the slide gate valve is installed on the movable valve 1 and valve body 4 of the slide gate valve, and includes a baffle 2 and a support pulley 3.

[0025] The baffle 2 is a plate-shaped structure with a cross-section consisting of a contact plate and an "L"-shaped plate. The part where one end of the contact plate and the "L"-shaped plate meet is rotatably mounted on the movable valve 1.

[0026] When the movable valve 1 is in the upper limit position, the turning angle at the other end of the "L"-shaped plate will cover the O-ring 6 set on the side of the movable valve 1.

[0027] A support pulley 3 is fixedly installed on the valve body 4. During the descent of the movable valve 1, the lower part of the contact plate of the baffle 2 is attached to the top of the support pulley 3, so that the turning angle of the "L"-shaped plate gradually exposes the O-ring seal 6. When the movable valve 1 reaches the lower limit position, the turning angle of the "L"-shaped plate no longer blocks the O-ring seal 6, and the bottom of the baffle 2 slides horizontally on the support pulley 3, so that the O-ring seal 6 is tightly attached to the side of the valve body 4.

[0028] Furthermore, the baffle 2 is mounted on the movable valve 1 on both sides via a rotating shaft 7. This rotatable mounting method allows the baffle 2 to move flexibly and automatically adjust its posture according to the position of the movable valve 1, thereby effectively protecting the O-ring seal 6 and exposing it in a timely manner.

[0029] The support pulley 3 is fixedly installed on the valve body 4 via the bracket 5, providing stable support and guidance for the movement of the baffle 2, and ensuring the smooth movement of the baffle 2 during the descent of the movable valve 1.

[0030] The installation process for the protective mechanism used for the gate valve seal ring is as follows:

[0031] Holes for mounting the rotating shaft 7 are machined at appropriate positions on both sides of the movable valve 1. The diameter and depth of the holes need to be precisely machined according to the dimensions of the rotating shaft 7 to ensure that the rotating shaft 7 can be installed securely.

[0032] Install the O-ring 6 on the designated position on the side of the movable valve 1, ensuring that the O-ring 6 is installed firmly, in the correct position, and without twisting or deformation.

[0033] The baffle 2 is made of a material with certain strength and heat resistance, such as stainless steel. The cross-section of the baffle 2 is a plate-shaped structure composed of a contact plate and an "L"-shaped plate. Its dimensions are designed according to the dimensions of the movable valve 1 and the O-ring seal 6.

[0034] Pass the rotating shaft 7 through the holes on both sides of the movable valve 1 and the corresponding mounting holes of the baffle 2, so that the baffle 2 can be rotatably mounted on the movable valve 1. During the installation process, ensure that the rotating shaft 7 rotates flexibly without jamming. You can reduce friction by applying an appropriate amount of lubricating oil.

[0035] The bracket 5 is fixed to the valve body 4 by welding. The welding position must be accurate and the welding quality must be reliable to ensure that the bracket 5 can stably support the pulley 3.

[0036] Install the support pulley 3 on the bracket 5. Bolts or other methods can be used to ensure that the support pulley 3 can rotate freely. After installation, check the rotation of the support pulley 3 to ensure that it rotates smoothly.

[0037] The working process of the protective mechanism for the sealing ring of the slide gate valve is as follows:

[0038] When the movable valve 1 begins to rise, the baffle 2, under its own weight, covers the O-ring 6 inside the "L"-shaped plate. At this time, the baffle 2 acts as a protective barrier, effectively blocking the direct heat radiation emitted by the moving workpiece and preventing the O-ring 6 from being affected by high temperature.

[0039] During the upward movement of the movable valve 1, the baffle 2 remains in a state of blocking the O-ring 6 until the movable valve 1 reaches the upper limit position.

[0040] As the movable valve 1 begins to descend, the lower part of the contact plate of the baffle 2 gradually comes into contact with the top of the support pulley 3. As the movable valve 1 continues to descend, the support pulley 3 generates an upward supporting force on the baffle 2, causing the baffle 2 to rotate around the rotation axis 7, and the turning angle of the "L"-shaped plate gradually exposes the O-ring seal 6.

[0041] During the descent of the movable valve 1, the contact and relative sliding between the baffle 2 and the supporting pulley 3 are smooth, ensuring the stability of the entire protection mechanism.

[0042] When the movable valve 1 reaches the lower limit position, the turning angle of the "L"-shaped plate no longer obstructs the O-ring seal 6. At the same time, the bottom of the baffle 2 slides horizontally on the support pulley 3, so that the O-ring seal 6 is tightly attached to the side of the valve body 4. At this time, the O-ring seal 6 fully exerts its sealing function to ensure the sealing performance of the slide gate valve.

[0043] It should be noted that the movable valve 1 is brought close to the valve body 4 by lateral force, that is, the O-ring seal 6 is pressed together to achieve a sealing function. This is the structural function of the slide gate valve itself. This structure will not be described in detail in this embodiment. It is only necessary to clarify that the running path of the movable valve 1 of the slide gate valve itself is to first descend to the position and then move laterally so that the side of the movable valve 1 is in close contact with the valve body 4 to achieve a seal.

[0044] When the movable valve 1 rises again, the process is similar to the first rise. Under the action of the movement of the movable valve 1 and its own gravity, the turning angle of the baffle 2's "L"-shaped plate once again covers the O-ring 6 inside, protecting the O-ring 6 from heat radiation.

[0045] During the actual operation of the vacuum continuous furnace, this protective mechanism effectively protects the O-ring 6 from direct heat radiation from the moving workpiece. By comparing the service life of the O-ring 6 before and after the installation of the protective mechanism, it was found that the service life of the O-ring 6 is significantly extended after the installation of the protective mechanism. For example, without the protective mechanism, the average service life of the O-ring 6 is [X] hours, while after the protective mechanism is installed, its average service life is extended to [X + Y] hours, greatly reducing the replacement frequency and maintenance cost of the seal.

[0046] When the movable valve 1 reaches its lower limit position, the bottom of the baffle 2 slides horizontally on the support pulley 3, so that the O-ring seal 6 can fit tightly against the side of the valve body 4, ensuring the sealing performance of the slide gate valve.

[0047] In actual production, by detecting changes in the vacuum level inside the furnace, it was found that after installing the protective mechanism, the vacuum level inside the furnace became more stable and could be effectively maintained within the specified range. This reduced gas leakage problems caused by poor sealing and improved product quality and production efficiency.

[0048] The protection mechanism features a reasonable structural design, tight fit between moving parts, and no noticeable jamming or abnormal noise during operation. After extensive practical operation testing, all components of the protection mechanism functioned normally, and no production accidents occurred due to mechanism failure, demonstrating the high operational stability and reliability of the protection mechanism.

[0049] This protective mechanism, through the design of the baffle 2, can automatically shield the O-ring 6 during the lifting and lowering of the movable valve 1, preventing it from being directly exposed to the heat radiation of the moving workpiece. This fundamentally solves the problem of high-temperature aging of the sealing ring and extends its service life.

[0050] When the movable valve 1 reaches its lower limit position, the baffle 2 can promptly expose the O-ring 6 and ensure it is tightly attached to the side of the valve body 4, thus guaranteeing the sealing performance of the slide gate valve and ensuring the normal operation of the vacuum continuous furnace and product quality.

[0051] The protective mechanism has a relatively simple structure, mainly composed of baffle 2, supporting pulley 3, rotating shaft 7, and bracket 5, resulting in low manufacturing and installation costs. Furthermore, the movement relationships between the components are clearly defined, ensuring high stability and reliability during operation and reducing the probability of malfunctions.

[0052] The protection mechanism works closely with the movable valve 1 and valve body 4 of the slide gate valve. During the normal lifting and lowering of the slide gate valve, it can automatically protect and seal the O-ring 6 without any additional operating steps, thus not increasing the workload of the operator.

Claims

1. A protective mechanism for the sealing ring of a slide gate valve, disposed on the movable valve (1) and valve body (4) of the slide gate valve, characterized in that, Includes a baffle (2) and a support pulley (3). The baffle (2) is a plate-shaped structure with a cross-section consisting of a contact plate and an "L"-shaped plate. The part where one end of the contact plate and the "L"-shaped plate are connected is rotatably mounted on the movable valve (1). When the movable valve (1) is in the upper limit position, the turning angle of the other end of the "L"-shaped plate covers the O-ring seal (6) set on the side of the movable valve (1). The support pulley (3) is fixedly installed on the valve body (4). During the descent of the movable valve (1), the lower part of the contact plate of the baffle (2) is attached to the top of the support pulley (3), so that the turning angle of the "L"-shaped plate gradually exposes the O-ring seal (6) until the movable valve (1) reaches the lower limit position. At that time, the turning angle of the "L"-shaped plate no longer covers the O-ring seal (6). The bottom of the baffle (2) slides horizontally on the support pulley (3) so that the O-ring seal (6) is tightly attached to the side of the valve body (4).

2. The protective mechanism for the sealing ring of a slide gate valve according to claim 1, characterized in that, The baffle (2) is mounted on the movable valve (1) on both sides via a rotating shaft (7).

3. The protective mechanism for the sealing ring of a slide gate valve according to claim 1, characterized in that, The support pulley (3) is fixedly installed on the valve body (4) by the bracket (5).

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