A graphite sealing device

Abstract

This utility model discloses a graphite sealing device for sealing between the furnace body of a drying oven and its feed end and / or discharge end. The graphite sealing device consists of graphite blocks, a mounting assembly, an upper pressing assembly, and a side pressing assembly. The mounting assembly is a flange, which is fixedly installed on the feed end and / or discharge end of the drying oven. The graphite blocks have a Z-shaped cross-section and are spliced ​​together and laid flat on the flange. The side pressing assembly is fixedly installed on the flange, located between two adjacent graphite blocks, and applies side pressure to the graphite blocks. The upper pressing assembly is fixedly installed on the flange, located above the graphite blocks, and applies top pressure to the graphite blocks, ensuring they are tightly attached to the outer surface of the furnace body. This graphite sealing device changes the structure of traditional sealing rings, adopts a spliced ​​structure, and optimizes the shape of the graphite blocks, effectively preventing leakage due to wear.

Description

Technical Field

[0001] This utility model relates to the field of mechanical dynamic seals, and in particular to a graphite sealing device. Background Technology

[0002] With the increasing prevalence of high-temperature processing technologies, the dust, particulate matter, and toxic substances generated during these processes pose a significant threat to the health of operators. Therefore, the requirements for system sealing, especially dynamic seals, are becoming increasingly stringent in industrial high-temperature processing equipment. Currently, complex sealing mechanisms are commonly used for dynamic sealing of products, but these mechanisms are costly and prone to loosening during installation. Therefore, addressing the issues of loose dynamic seals leading to leakage and high costs is crucial.

[0003] For example, Chinese patent 201910392945.5 describes a spring-tensioned graphite sealing device. The device comprises a fixed frame and graphite blocks. The graphite blocks are disposed inside the fixed frame. A U-shaped clamp is mounted on the fixed frame, and a steel wire rope is wound around the U-shaped clamp. One end of the steel wire rope is fixed to the fixed frame via a steel wire rope fixing block, and the other end is fixed to the fixed frame via a tightening mechanism. The steel wire rope fixing block and the tightening mechanism are located on opposite sides of the U-shaped clamp. The graphite blocks are joined together via a ferrule-like structure, and the sealing relies entirely on this structure. Therefore, a U-shaped clamp and a diagonally pulled steel wire rope are designed. Furthermore, to cope with wear, a gap is reserved between adjacent graphite blocks for their contraction. However, in actual use, the wear of all graphite blocks is not uniform. Some graphite blocks wear out quickly, while others wear out slowly. The graphite blocks that wear out quickly move more under the action of the U-shaped clamp and steel wire rope, which causes the joints between the graphite blocks to lift up, thus affecting the sealing between the graphite blocks and leading to leakage. Summary of the Invention

[0004] The problem to be solved by this utility model is to propose an improvement or replacement solution to address the shortcomings of the prior art, especially an improvement or replacement solution that maintains the sealing effect after wear.

[0005] To solve the above problems, the present invention adopts the following solution: a graphite sealing device for sealing between the furnace body of a drying oven and the feed end and / or discharge end, characterized in that the graphite sealing device consists of graphite blocks, an installation assembly, an upper pressing assembly, and a side pressing assembly; the installation assembly is a flange, which is fixedly installed on the feed end and / or discharge end of the drying oven; the graphite blocks are generally flat, with parallel sides and installation steps forming a Z-shaped structure, and the bottom edge has an arc-shaped structure matching the outer surface of the furnace body; the graphite blocks are laid flat on the flange, with adjacent graphite blocks spliced ​​in a V-shape, and the bottom corners of the sides of adjacent graphite blocks overlapping each other through the installation steps, and the bottom edge of the graphite blocks contacting the edge of the furnace body; the side pressing assembly is fixedly installed on the flange, located between adjacent graphite blocks, and applies side pressure to the graphite blocks; the upper pressing assembly is fixedly installed on the flange, located above the graphite blocks, and applies top pressure to the graphite blocks, making them tightly adhere to the outer surface of the furnace body.

[0006] Furthermore, the graphite sealing device is characterized in that a reinforcing plate is provided on the flange to enhance the connection strength between the flange and the feed end and / or the discharge end.

[0007] Furthermore, the graphite sealing device is characterized in that each graphite block is provided with two upper pressing components, the number of reinforcing plates is the same as the number of upper pressing components, and the installation positions of the upper pressing components correspond one-to-one with the reinforcing plates.

[0008] Furthermore, the graphite sealing device is characterized in that the side pressure assembly includes a side pressure plate, a side pressure block and a side pressure bolt, the side pressure block is fixedly mounted on the flange, the side pressure plate is connected to the side pressure block by the side pressure bolt, the side pressure block has an overall trapezoidal structure, and its two sides match the Z-shaped sides of the graphite block, and the thickness of the side pressure block is less than or equal to the thickness of the graphite block.

[0009] Furthermore, the graphite sealing device is characterized in that the upper clamping assembly includes an upper clamping block, a spring, a clamping ring, a U-shaped component, an upper clamping bolt, and a fastening nut; the U-shaped component is fixedly mounted on the flange, located above the graphite block and perpendicular to the furnace body, and has an internal threaded hole and a through hole that match the upper clamping bolt; the clamping ring is fixedly mounted on the upper clamping bolt, located below the upper clamping bolt, and the length of the upper clamping bolt below the clamping ring is less than or equal to the thickness of the upper clamping block; the upper clamping bolt above the clamping ring passes through the internal threaded hole and the through hole on the U-shaped component, and the upper clamping bolt below the clamping ring is sequentially fitted with the spring and the upper clamping block, and the upper clamping block abuts against the graphite block by rotating the upper clamping bolt; the fastening nut is located at the upper end of the upper clamping bolt and cooperates with the U-shaped component to lock the upper clamping bolt.

[0010] Furthermore, the graphite sealing device is characterized in that the spring is a disc spring.

[0011] Furthermore, the graphite sealing device is characterized in that the clamping ring and the upper pressure bolt are fixed by welding, or the clamping ring and the upper pressure bolt are fixed by grommets, or the clamping ring and the upper pressure bolt are an integral structure.

[0012] Furthermore, the graphite sealing device is characterized in that the installation step is a rectangular groove, and the thickness of the rectangular groove is half the thickness of the graphite block.

[0013] The technical effects of this utility model are as follows: 1. This design optimizes the structure of the graphite block by designing the sides of the graphite block as parallel to each other, and setting installation steps with a Z-shaped cross-section on the sides. The installation steps are rectangular grooves, and adjacent graphite blocks are sealed by overlapping the installation steps. Because the sides of the graphite blocks are parallel to each other, the graphite blocks can move independently. Even if one graphite block wears out faster and moves downwards more, it will not affect the sealing performance between adjacent graphite blocks.

[0014] After the graphite blocks are laid overlapping on the flange, they are restrained on the flange by the side pressure assembly, which provides pressure at the overlap of adjacent graphite blocks to ensure the sealing between them. Because the sides of the graphite blocks are parallel, they form a V-shape when spliced ​​on the flange, and this gap is used to install the side pressure assembly. The side pressure block itself has a trapezoidal structure, and its two sides match the sides of the graphite blocks, also acting as guide grooves to ensure that the graphite blocks are always perpendicular to the furnace body.

[0015] The pressure-adjusting assembly provides pressure to the graphite block pointing towards the furnace body axis, ensuring the bottom edge of the graphite block remains in contact and sealed with the furnace body. The spring in the pressure-adjusting assembly not only effectively prevents rigid impacts caused by vibration but also provides a wear allowance. After the graphite block wears down, the pressure-adjusting assembly drives it to move towards the furnace body, maintaining a sealed state. Furthermore, because the sides of the graphite block are parallel, it does not affect adjacent graphite blocks on either side. The wear condition of the graphite block can be assessed by observing the spring deformation, allowing for timely adjustment of the pressure-adjusting assembly or replacement of the graphite block.

[0016] Each graphite block is equipped with two upper pressure components to ensure that the bottom edge of the graphite block is evenly stressed with respect to the furnace body. Together with the upper pressure block guide groove, it ensures that the graphite block is always perpendicular to the furnace body.

[0017] The springs of the upper pressure assembly are preferably disc springs, which can withstand large loads, have strong buffering and vibration absorption capabilities, and have high precision and stability, which is conducive to keeping the graphite blocks perpendicular to the furnace body.

[0018] Adding triangular reinforcing plates to the flange can greatly enhance its strength, especially when the reinforcing plates are matched with the upper pressure assembly, with one reinforcing plate corresponding to one upper pressure assembly. Therefore, thinner flanges can be used, facilitating the retrofitting of existing drying ovens and reducing costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a graphite sealing device.

[0020] Figure 2 for Figure 1 Cross-sectional view along direction A.

[0021] Figure 3 Schematic diagram of the upper pressure component structure Figure 1 .

[0022] Figure 4 Schematic diagram of the upper pressure component structure Figure 2 .

[0023] Figure 5 Schematic diagram of graphite structure Figure 1 .

[0024] Figure 6 Schematic diagram of graphite structure Figure 2 .

[0025] Figure 7 Schematic diagram of side pressure assembly Figure 1 .

[0026] Figure 8 Schematic diagram of side pressure assembly Figure 2 .

[0027] Figure 9 Schematic diagram of side pressure block Figure 1 .

[0028] Figure 10 Schematic diagram of side pressure block Figure 2 .

[0029] Among them, 1 is the upper pressure component, 2 is the graphite block, 3 is the side pressure component, 4 is the flange, 5 is the reinforcing plate, 6 is the feed end of the drying oven, 7 is the oven body, 11 is the upper pressure bolt, 12 is the fastening nut, 13 is the U-shaped part, 14 is the clamping ring, 15 is the spring, 16 is the upper clamping block, 21 is the installation step, 31 is the side pressure plate, 32 is the side pressure block, and 33 is the side pressure bolt. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Example: A graphite sealing device is used for sealing between the furnace body of a drying oven and the feed end and / or discharge end. The graphite sealing device consists of graphite blocks, mounting components, an upper clamping component, and a side clamping component. The mounting components are flanges, which are fixedly installed on the feed end and / or discharge end of the drying oven. The graphite blocks are generally flat, with parallel sides and mounting steps forming a Z-shaped structure. The mounting steps are rectangular grooves, half the thickness of the graphite blocks, and the bottom edge has an arc shape matching the outer surface of the furnace body. The graphite blocks are laid flat on the flange, with adjacent graphite blocks joined in a V-shape. The bottom corners of adjacent graphite blocks overlap through the mounting steps, and the bottom edge of the graphite blocks contacts the edge of the furnace body. The side clamping component is fixedly installed on the flange, located between adjacent graphite blocks, and applies side pressure to the graphite blocks. The upper clamping component is fixedly installed on the flange, located above the graphite blocks, and applies top pressure to the graphite blocks, making them tightly adhere to the outer surface of the furnace body.

[0032] The flange is equipped with a reinforcing plate to strengthen the connection between the flange and the feed end and / or discharge end. Each graphite block is equipped with two upper clamping assemblies, the number of which is the same as the number of reinforcing plates, and the installation positions of the upper clamping assemblies correspond one-to-one with the reinforcing plates.

[0033] The side pressure assembly includes a side pressure plate, a side pressure block, and side pressure bolts. The side pressure block is fixedly mounted on the flange. The side pressure plate is connected to the side pressure block by the side pressure bolts. The side pressure block has an overall trapezoidal structure, and its two sides match the Z-shaped sides of the graphite block. The thickness of the side pressure block is less than or equal to the thickness of the graphite block.

[0034] The upper clamping assembly includes an upper clamping block, a spring, a clamping ring, a U-shaped component, an upper clamping bolt, and a fastening nut. The U-shaped component is fixedly mounted on the flange, located above the graphite block and perpendicular to the furnace body. The U-shaped component has an internal threaded hole matching the upper clamping bolt and a through hole. The clamping ring is fixedly mounted on the upper clamping bolt, located below the upper clamping bolt, and the length of the upper clamping bolt below the clamping ring is less than or equal to the thickness of the upper clamping block. The upper clamping bolt above the clamping ring passes through the internal threaded hole and the through hole on the U-shaped component. The upper clamping bolt below the clamping ring is fitted with a spring and an upper clamping block in sequence. Rotating the upper clamping bolt causes the upper clamping block to press against the graphite block. The spring is a disc spring. The fastening nut is located at the upper end of the upper clamping bolt and cooperates with the U-shaped component to lock the upper clamping bolt in place. The clamping ring and the upper clamping bolt are an integral structure.

Claims

1. A graphite sealing device for sealing between a drying furnace body and a feed end and / or a discharge end, characterized in that, The graphite sealing device consists of graphite blocks, mounting components, an upper clamping component, and a side clamping component. The mounting component is a flange, which is fixedly installed on the feed end and / or discharge end of the drying oven. The graphite block is generally flat, with its two sides parallel to each other and equipped with mounting steps to form a Z-shaped structure. The bottom edge has an arc-shaped structure that matches the outer surface of the oven body. The graphite blocks are laid flat on the flange, with adjacent graphite blocks spliced ​​in a V-shape. The bottom corners of adjacent graphite blocks overlap each other through the mounting steps, and the bottom edge of the graphite block contacts the edge of the oven body. The side clamping component is fixedly installed on the flange, located between adjacent graphite blocks, and applies side pressure to the graphite blocks. The upper clamping component is fixedly installed on the flange, located above the graphite blocks, and applies top pressure to the graphite blocks, making them tightly adhere to the outer surface of the oven body.

2. The graphite seal apparatus of claim 1, wherein The flange is equipped with a reinforcing plate to strengthen the connection between the flange and the feed end and / or discharge end.

3. The graphite seal of claim 2, wherein Each graphite block is equipped with two upper clamping components, the number of reinforcing plates is the same as the number of upper clamping components, and the installation positions of the upper clamping components correspond one-to-one with the reinforcing plates.

4. The graphite seal of claim 1, wherein The side pressure assembly includes a side pressure plate, a side pressure block, and side pressure bolts. The side pressure block is fixedly mounted on the flange. The side pressure plate is connected to the side pressure block by the side pressure bolts. The side pressure block has an overall trapezoidal structure, and its two sides match the Z-shaped sides of the graphite block. The thickness of the side pressure block is less than or equal to the thickness of the graphite block.

5. The graphite seal of claim 1, wherein The upper clamping assembly includes an upper clamping block, a spring, a clamping ring, a U-shaped component, an upper clamping bolt, and a fastening nut. The U-shaped component is fixedly mounted on the flange, located above the graphite block and perpendicular to the furnace body. The U-shaped component has an internal threaded hole that matches the upper clamping bolt and a through hole. The clamping ring is fixedly mounted on the upper clamping bolt, located below the upper clamping bolt, and the length of the upper clamping bolt below the clamping ring is less than or equal to the thickness of the upper clamping block. The upper clamping bolt above the clamping ring passes through the internal threaded hole and the through hole on the U-shaped component. The upper clamping bolt below the clamping ring is fitted with the spring and the upper clamping block in sequence. By rotating the upper clamping bolt, the upper clamping block abuts against the graphite block. The fastening nut is located at the upper end of the upper clamping bolt and cooperates with the U-shaped component to lock the upper clamping bolt.

6. The graphite seal of claim 1, wherein The installation steps are rectangular grooves, and the thickness of the rectangular grooves is half the thickness of the graphite block.

7. The graphite seal of claim 5 wherein, The spring is a disc spring.

8. The graphite seal of claim 5 wherein, The clamping ring and the upper clamping bolt are fixed by welding, or by grommets, or the clamping ring and the upper clamping bolt are an integral structure.

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