A plug valve seal material replacement device

Abstract

The utility model discloses a plug valve sealing material replacement device belongs to industrial valve maintenance and environmental protection equipment technical field, a plug valve sealing material replacement device, including valve body and mounting bracket, the mounting bracket is located the upside of valve body, the upper portion of mounting bracket is equipped with the adjusting wheel, the inside installation of valve body has the valve plate, the below fixed connection of valve plate has the arc plate, and the lateral surface fixed connection of valve plate has the adaptation seat, the below fixed connection of adjusting wheel has the screw rod, the inside wall of valve body is set up and has the sealing groove, the upper portion of sealing groove is clamped and is embedded and is connected with the high temperature resistance bottom support, through setting up the high temperature resistance bottom support that can slide along the sealing groove and draws out, and will sealing material integration on it, make sealing unit modularization, when sealing material ageing abrasion, only need to open the valve body side overhauls mouth, can draw out and replace new piece entire bottom support, need not to disassemble valve body or to stop furnace for several days, greatly shorten the overhauls time, reduce operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of industrial valve maintenance and environmental protection equipment technology, and more specifically, to a device for replacing the sealing material of a slide gate valve. Background Technology

[0002] In industries such as metallurgy, power generation, waste incineration, and cement, flue gas slide gate valves are widely used for the opening and closing control of high-temperature and highly corrosive flue gas pipelines. Their sealing performance depends on the high-temperature resistant sealing material (such as flexible graphite, ceramic fiber, etc.) installed in the sealing groove inside the valve body.

[0003] Based on the above, the inventors have discovered that existing slide gate valves generally suffer from the following problems: the sealing material is directly embedded inside the valve body without any detachable structure. Once wear, aging, or cracking occurs due to long-term high temperature, corrosion, or repeated friction of the valve plate, it cannot be replaced individually. It can only be handled by disassembling the entire valve or even scrapping the entire valve, resulting in long maintenance cycles, high costs, and serious production interruptions. Therefore, in view of this, the inventors have researched and improved the existing structure to provide a slide gate valve sealing material replacement device, aiming to achieve a more practical purpose. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a sealing material replacement device for a slide gate valve. It can cooperate with an external adjustment mechanism through a detachable high-temperature resistant base to quickly replace the sealing material from the outside of the valve body without disassembling the valve body and under short-term shutdown conditions, effectively restoring the sealing performance, extending the equipment life, and ensuring personnel safety.

[0006] Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A sealing material replacement device for a slide gate valve includes a valve body and a mounting bracket. The mounting bracket is positioned directly above the valve body, and an adjusting wheel is mounted on top of the mounting bracket. A valve plate is installed inside the valve body, and an arc-shaped plate is fixedly connected to the lower part of the valve plate. An adapter seat is fixedly connected to the side of the valve plate. A screw is fixedly connected to the lower part of the adjusting wheel. A sealing groove is formed on the inner side wall of the valve body, and a high-temperature resistant base is fitted above the sealing groove. A trapezoidal abutment is attached to the side of the high-temperature resistant base. A sealing ring is fitted on the side of the valve body, and an arc-shaped sealing gasket is provided at the connection between the sealing groove and the high-temperature resistant base.

[0009] Furthermore, the adapter seat has a threaded groove on its inner side, and the screw is threadedly connected to the threaded groove.

[0010] Furthermore, the high-temperature resistant base is made of 310S stainless steel, and its upper surface is embedded with a replaceable flexible graphite sealing strip.

[0011] Furthermore, the trapezoidal abutment is fixed to the inner wall of the valve body, and its inclined surface abuts against the side of the high-temperature resistant base.

[0012] Furthermore, the sealing groove extends circumferentially along the valve body, and the high-temperature resistant base is slidably pulled out along the groove.

[0013] Furthermore, an inspection port is provided on the outer side of the valve body corresponding to the sealing groove position.

[0014] Furthermore, a handle is fixedly connected above the adjusting wheel. The handle is spherical, and its outer surface is fixedly provided with anti-slip texture.

[0015] Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) In this solution, a high-temperature resistant base that can be slidably pulled out along the sealing groove is set up, and the sealing material is integrated on it, so that the sealing unit is modularized. When the sealing material ages and wears out, the entire base can be pulled out and replaced with a new part simply by opening the inspection port on the side of the valve body. There is no need to disassemble the valve body or shut down the furnace for several days, which greatly shortens the maintenance time and reduces the operation and maintenance cost.

[0018] (2) In this scheme, by setting the trapezoidal stop block and the arc-shaped sealing gasket, a multi-stage sealing structure is formed when the valve plate is closed; at the same time, the external adjusting wheel and screw provide a stable driving force to ensure that the sealing surface is pressed evenly, effectively preventing high-temperature flue gas leakage, ensuring the safety of the working environment, and extending the overall service life of the slide valve. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the planar aspect of this utility model;

[0021] Figure 3 This is a top view schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the main body of the slide gate valve of this utility model;

[0023] Figure 5 This is a schematic diagram of the interior of the valve body of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Valve body; 2. Arc plate; 3. Mounting bracket; 4. Adjusting wheel; 5. High temperature resistant base; 6. Screw; 7. Adapter seat; 8. Sealing groove; 9. Trapezoidal stop block; 10. Sealing ring; 11. Arc-shaped sealing gasket; 12. Valve plate; 13. Hand handle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please see Figure 1-5 A sealing material replacement device for a slide gate valve includes a valve body 1 and a mounting bracket 3. The mounting bracket 3 is located directly above the valve body 1. An adjusting wheel 4 is installed above the mounting bracket 3. A valve plate 12 is installed inside the valve body 1. An arc-shaped plate 2 is fixedly connected to the lower part of the valve plate 12, and an adapter seat 7 is fixedly connected to the side of the valve plate 12. A screw 6 is fixedly connected to the lower part of the adjusting wheel 4. A sealing groove 10 is opened on the inner side wall of the valve body 1. A high-temperature resistant base 5 is embedded above the sealing groove 10. A trapezoidal abutment 9 is attached to the side of the high-temperature resistant base 5. A sealing ring 10 is sleeved on the side of the valve body 1. An arc-shaped sealing gasket 11 is provided at the connection between the sealing groove 10 and the high-temperature resistant base 5.

[0029] See Figure 1 and Figure 4 The inner side of the adapter seat 7 is provided with a threaded groove, and the screw 6 is threadedly connected to the threaded groove. Rotating the adjusting wheel 4 can drive the valve plate 12 and the arc plate 2 to rise and fall.

[0030] See Figure 1 The high-temperature resistant base 5 is made of 310S stainless steel, and its upper surface is embedded with a replaceable flexible graphite sealing strip to form a modular sealing unit. 310S stainless steel has excellent anti-oxidation and anti-creep properties and can work for a long time at 650℃ without deformation. The flexible graphite sealing strip is corrosion resistant and self-lubricating, and is integrated with the high-temperature resistant base 5 to form a standardized module, which is convenient for quick identification, disassembly and replacement, solving the problem of traditional sealing materials being "non-replaceable and difficult to position".

[0031] See Figure 4 and Figure 5The trapezoidal abutment 9 is fixed to the inner wall of the valve body 1, and its inclined surface abuts against the side of the high-temperature resistant base 5. When the valve plate is pressed down, the pressure is transmitted to the high-temperature resistant base 5 through the arc plate 2. After the base is subjected to force, a lateral force is generated along the inclined surface of the trapezoidal abutment 9, which makes the sealing material fit more tightly against the surface of the valve plate, forming a "self-reinforcing sealing" effect, which significantly improves the air tightness under high temperature conditions.

[0032] See Figure 4 and Figure 5 The sealing groove 8 runs through the valve body 1 in a circumferential direction, and the high-temperature resistant base 5 slides out along the groove. The through-type sealing groove design provides a clear sliding path for the sealing unit, so that the replacement operation does not need to damage the valve body structure and can be completed by simply pulling it horizontally, which greatly reduces the technical threshold of maintenance and operation time.

[0033] See Figure 4 and Figure 5 An inspection port is provided on the outer side of the valve body 1 at the position corresponding to the sealing groove 8. The inspection port is sealed with the flange cover plate. This inspection port serves as a dedicated maintenance channel. It is completely sealed when ensuring normal operation (to prevent flue gas leakage) and is only opened when replacement is required. This satisfies the daily airtightness requirements and provides a physical interface for quick maintenance.

[0034] See Figure 1 and Figure 4 A handle 13 is fixedly connected above the adjusting wheel 4. The handle 13 is spherical and has anti-slip texture on its outer surface. The handle 13 provides an ergonomic operating point, so that even when wearing protective gloves or in a space-constrained environment, the operator can easily apply force to ensure smooth valve opening and closing and improve equipment availability.

[0035] In use: During normal operation, the operator turns the handle 13, causing the adjusting wheel 4 to rotate. Through the threaded engagement of the screw 6 and the adapter seat 7, the valve plate 12 moves downward, causing the arc-shaped plate 2 at the bottom of the valve plate to press against the high-temperature resistant base 5 in the sealing groove 8. At this time, the side of the high-temperature resistant base 5 is pushed back by the inclined surface of the trapezoidal abutment block 9, generating a lateral force, which makes the flexible graphite sealing strip embedded on it fit more tightly against the surface of the valve plate, forming a multiple seal and effectively preventing the leakage of high-temperature and corrosive flue gas. When the sealing material wears or ages due to long-term use, it is not necessary to disassemble the entire valve body. The operator only needs to briefly stop the machine, open the flange cover plate inspection port at the corresponding position on the outside of the valve body 1, and pull out the entire high-temperature resistant base 5 horizontally along the circumferentially continuous sealing groove 8. After replacing it with a base module pre-installed with a new sealing strip, push it back into place and reset the cover plate to resume operation. This process is completed outside the valve body, avoiding personnel contact with toxic fumes, and is quick and easy to operate.

[0036] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A sealing material replacement device for a slide gate valve, comprising a valve body (1) and a mounting bracket (3), wherein the mounting bracket (3) is disposed directly above the valve body (1), and an adjusting wheel (4) is mounted above the mounting bracket (3), characterized in that: A valve plate (12) is installed inside the valve body (1). An arc plate (2) is fixedly connected to the lower part of the valve plate (12), and an adapter seat (7) is fixedly connected to the side of the valve plate (12). A screw (6) is fixedly connected to the lower part of the adjusting wheel (4). A sealing groove (8) is opened on the inner side wall of the valve body (1). A high-temperature resistant base (5) is embedded above the sealing groove (8). A trapezoidal abutment (9) is attached to the side of the high-temperature resistant base (5). A sealing ring (10) is sleeved on the side of the valve body (1). An arc-shaped sealing gasket (11) is provided at the connection between the sealing groove (8) and the high-temperature resistant base (5).

2. The sealing material replacement device for a slide gate valve according to claim 1, characterized in that: The adapter (7) has a threaded groove on its inner side, and the screw (6) is threadedly connected to the threaded groove.

3. The sealing material replacement device for a slide gate valve according to claim 1, characterized in that: The high-temperature resistant base (5) is made of 310S stainless steel and has a replaceable flexible graphite sealing strip embedded on its upper surface.

4. The sealing material replacement device for a slide gate valve according to claim 1, characterized in that: The trapezoidal abutment (9) is fixed to the inner wall of the valve body (1), and its inclined surface abuts against the side of the high-temperature resistant base (5).

5. A gate valve sealing material replacement device according to claim 1, characterized in that: The sealing groove (8) runs through the valve body (1) circumferentially, and the high-temperature resistant base (5) slides out along the groove.

6. The sealing material replacement device for a slide gate valve according to claim 1, characterized in that: An inspection port is provided on the outer side of the valve body (1) at the position corresponding to the sealing groove (8).

7. The sealing material replacement device for a slide gate valve according to claim 1, characterized in that: A handle (13) is fixedly connected above the adjusting wheel (4). The handle (13) is spherical and has anti-slip texture on its outer surface.

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