End face sealing structure for aging drum

Abstract

The utility model discloses an end face sealing structure for an aging drum, and belongs to the field of aging drum sealing. An end face sealing structure for an aging drum comprises a rotating part and a fixing part, the rotating part is a conical ring originally installed on a drum body, the fixing part is installed on a drum cover and comprises a sealing side plate connected with the drum cover through a bolt, and a sealing pressing plate and a lining plate are installed on the side, facing the drum body, of the sealing side plate. The sealing pressing plate is located on the outer side of the inner lining plate, a sealing groove is reserved between the sealing pressing plate and the inner lining plate, a push plate is installed in the sealing groove and slides in the sealing groove, a sealing gasket is installed on the side, facing the drum body, of the push plate, and the other side of the push plate is connected with a plurality of elastic telescopic rods installed on the sealing side plate. According to the utility model, the sealing gasket is convenient to replace and can be pushed by virtue of the elastic telescopic rod during use, so that the sealing between the abraded sealing gasket and the drum body is reduced, and the phenomenon of material leakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aging drum sealing technology, and in particular to an end face sealing structure for aging drums. Background Technology

[0002] In viscose production, the aging drum plays a crucial role. After the alkali cellulose from the press and pulverizer enters the aging drum, it undergoes an oxidative degradation reaction with oxygen in the air under specific temperature and humidity conditions, yielding alkali cellulose with a certain degree of polymerization. The aging drum is a horizontal cylindrical drum approximately 30 meters long and 3.4 meters in diameter, serving to regulate temperature and humidity. The rotation of the drum transports the alkali cellulose and ensures temperature uniformity. The drum body has a 1% installation slope from the inlet to the outlet, allowing the alkali cellulose to move slowly towards the outlet within the drum body.

[0003] Under normal operating conditions, the drum covers at both ends of the aging drum are stationary, and the drum body rotates at a speed of approximately 0.8-1 r / min. The drum cover and drum body are designed with a dynamic sealing structure, which we call an end face seal. Traditional end face seals use an internal rubber sealing ring fixed to the end of the drum cover, relying on the positive pressure inside the drum to compensate for the seal. The sealing ring and the drum body are in constant contact. Since the aging drum body rotates continuously, the drum body and the sealing ring rub against each other for a long time, causing the sealing ring to wear. In addition, the rubber sealing ring is in a humid and hot alkaline environment for a long time, which makes it prone to aging, hardening and deformation. Usually, it loses its sealing function in less than a year, causing alkali cellulose leakage.

[0004] A search revealed Chinese patent application number 202020017406.1, which discloses a sealing structure for an aging drum. The structure includes a cylinder and a feed end cap, comprising a metal sealing ring, a K-type seal, and a fixing structure. The metal sealing ring is fixedly connected to the cylinder, and the K-type seal is connected to the feed end cap via the fixing structure. The K-type seal, in conjunction with the metal sealing ring, achieves a seal on the aging drum cylinder. The good elasticity and angular compression force of the K-type seal used in this invention ensure a self-adjusting sealing effect, resulting in a good sealing performance. Furthermore, the K-type seal is not easily damaged and has a long service life.

[0005] Although the aforementioned patent can seal the drum body and drum cover by using a metal sealing ring and a K-type seal, the long-term contact between the seal and the metal sealing ring will cause wear on the contact surface of the seal due to the rotation of the drum body. Even if the seal has a certain degree of elasticity, gaps will still be generated between its contact surface and the drum body after wear, which will reduce its sealing ability and cause leakage of the internal alkali cellulose. Replacing the seal will also increase its production cost.

[0006] Therefore, there is an urgent need for an end-face sealing structure for aging drums to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to solve the problem of alkali cellulose leakage caused by wear of the seal on the contact surface between the seal and the drum body after long-term use in the prior art, and to propose an end face sealing structure for aging drums.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An end-face sealing structure for an aging drum includes a rotating part and a fixing part. The rotating part is a conical ring originally mounted on the drum body, and the fixing part is mounted on the drum cover. The fixing part includes a sealing side plate that is bolted to the drum cover. A sealing pressure plate and an inner liner plate are mounted on the side of the sealing side plate facing the drum body. The sealing pressure plate is located outside the inner liner plate. A sealing groove is left between the sealing pressure plate and the inner liner plate. A push plate is installed in the sealing groove and slides in the sealing groove. A sealing gasket is installed on the side of the push plate facing the drum body. The other side of the push plate is connected to a plurality of elastic telescopic rods mounted on the sealing side plate.

[0010] As a preferred technical solution of this application, the elastic telescopic rod includes a sleeve fixed on the sealing side plate, an end plate is installed at one end of the sleeve, a slider is slidably installed inside the sleeve, a first connecting rod and a second connecting rod connected to the push plate are respectively installed at both ends of the slider, and a spring is provided between the slider and the end plate.

[0011] As a preferred technical solution of this application, the push plate has a plurality of uniform anti-slip protrusions installed on the side facing the sealing gasket.

[0012] As a preferred technical solution of this application, the anti-slip protrusion is a rectangular anti-slip block.

[0013] As a preferred technical solution of this application, the outer ends of a plurality of second connecting rods are connected to pressure rings.

[0014] As a preferred technical solution of this application, a plurality of guide posts with a semi-circular cross-section are uniformly installed on the outer side of the push plate.

[0015] As a preferred technical solution of this application, both the sealing pressure plate and the inner liner plate are annular and welded to the sealing side plate.

[0016] Compared with the prior art, this utility model provides an end face sealing structure for aging drums, which has the following beneficial effects:

[0017] 1. The end face sealing structure for aging drums, through the setting of a sealing side plate connected by bolts, enables convenient replacement of severely worn sealing gaskets after long-term use, solving the problem that the sealing gaskets installed on the inside of the drum cover in the prior art are inconvenient to replace;

[0018] 2. The end face sealing structure for aging drum, through the set push plate and the elastic telescopic rod connected to the push plate, realizes that under the elastic force of the elastic telescopic rod, the sealing gasket located in the sealing groove is pushed, so that the sealing gasket can still stick to the drum body after wear. This solves the problem in the prior art that the sealing gasket will wear a lot during long-term contact with the drum body, resulting in gaps at the connection and material leakage.

[0019] 3. The end face sealing structure for aging drums, by setting multiple uniform anti-slip protrusions on the push plate, achieves the stability of the sealing gasket when it contacts the drum body. This solves the problem in the prior art where the sealing gasket rotates under the drive of the rotating drum body, causing friction between it and the sealing pressure plate and inner liner plate, thus wearing down the sealing gasket. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the push plate mounting structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of the sealing pressure plate and inner lining plate of this utility model;

[0023] Figure 4 This is a schematic diagram of the elastic telescopic rod structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the push plate structure of this utility model.

[0025] In the picture:

[0026] 1. Pressure ring; 2. Elastic telescopic rod; 201. First connecting rod; 202. Sleeve; 203. Slider; 204. Spring; 205. Second connecting rod; 206. End plate; 3. Sealing side plate; 4. Sealing pressure plate; 5. Sealing gasket; 6. Bolt; 7. Inner liner plate; 8. Drum cover; 9. Guide post; 10. Anti-slip protrusion; 11. Push plate. Detailed Implementation

[0027] 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.

[0028] Example:

[0029] Reference Figures 1-5 A sealing structure for the end face of an aging drum includes a rotating part and a fixing part. The rotating part is a conical ring originally mounted on the drum body. The fixing part is mounted on the drum cover 8 and includes a sealing side plate 3 connected to the drum cover 8 by bolts 6. A sealing pressure plate 4 and an inner liner plate 7 are mounted on the side of the sealing side plate 3 facing the drum body. Both the sealing pressure plate 4 and the inner liner plate 7 are annular and welded to the sealing side plate 3. The sealing pressure plate 4 is located outside the inner liner plate 7. A sealing groove is left between the sealing pressure plate 4 and the inner liner plate 7. A push plate 11 is installed in the sealing groove and slides in the sealing groove. A sealing gasket 5 is installed on the side of the push plate 11 facing the drum body. The other side of the push plate 11 is connected to an elastic telescopic rod 2. The elasticity of the elastic telescopic rod 2 is used to push the plate. The push plate 11 is squeezed, so that when the push plate 11 slides in the sealing groove, it can also drive the sealing gasket 5 to slide. When connecting the end face of the drum, even under long-term rotational friction, the sealing gasket 5 can be tightly connected to the solid under the action of the elastic telescopic rod 2, reducing leakage. The sealing gasket 5 can be made of polytetrafluoroethylene packing. Polytetrafluoroethylene packing has excellent corrosion resistance and good self-lubricating properties, which can effectively reduce friction and wear and extend service life. The sealing side plate 3 connected by bolts 6 can be easily disassembled after long-term use, and the sealing gasket 5 installed on the sealing side plate 3 can be replaced. It is more convenient and faster to replace the sealing gasket 5 than when it is installed inside the drum cover 8.

[0030] Reference Figure 1 and Figure 2 Furthermore, it also includes multiple pressure rings 1 connected to the outer ends of the second connecting rods 205. The multiple elastic telescopic rods 2 are connected by the pressure rings 1. During use, the telescopic dimensions of the multiple elastic telescopic rods 2 can be kept consistent. During use, the force balance of the sealing gasket 5 can be maintained. After contacting the drum body, the wear of its contact surface can be more uniform after use, thus improving the service life of the sealing gasket 5.

[0031] Reference Figure 4Furthermore, the elastic telescopic rod 2 includes a sleeve 202 fixed on the sealing side plate 3. One end of the sleeve 202 is equipped with an end plate 206. A slider 203 is slidably installed inside the sleeve 202. A first connecting rod 201 and a second connecting rod 205 are respectively installed at both ends of the slider 203. The first connecting rod 201 is connected to the push plate 11, and the second connecting rod 205 is connected to the pressure ring 1. A spring 204 is provided between the slider 203 and the end plate 206. The spring force of the spring 204 drives the slider 203 to slide inside the sleeve 202. The first connecting rod 201 compresses the push plate 11, so that the sealing gasket 5 can still fit with the drum body after the contact surface is worn, thereby improving the sealing performance at the connection and preventing gaps from appearing at the connection between the sealing gasket 5 and the drum body after wear, which would lead to material leakage. At the same time, the sealing gasket 5 can also improve its utilization rate under the action of the elastic telescopic rod 2, further reducing production and use costs.

[0032] Reference Figure 5 Furthermore, multiple uniform anti-slip protrusions 10 are installed on the side of the push plate 11 facing the sealing gasket 5. The anti-slip protrusions 10 increase the friction at the connection between the push plate 11 and the sealing gasket 5. After connecting with the rotating drum, they can effectively keep the sealing gasket 5 in place, reduce the rotation of the sealing gasket 5, reduce the wear between the sealing gasket 5 and the sealing pressure plate 4 and the inner liner plate 7, and improve the service life of the sealing gasket 5. The anti-slip protrusions 10 are rectangular anti-slip blocks. Multiple uniform guide posts 9 are installed on the outer surface of the push plate 11. The cross-section of the guide posts 9 is semi-circular. After the guide posts 9 are combined with the semi-circular guide groove opened on the inner side of the sealing pressure plate 4, the sliding of the push plate 11 can be more stable. During use, the stable push plate 11 can make the movement of the sealing gasket 5 on it more stable, which can greatly improve the service life of the sealing gasket 5.

[0033] Specifically, the end-face sealing structure used for aging drums operates as follows: After installation, the sealing gasket 5 contacts the rotating drum body. After prolonged use, the side of the sealing gasket 5 facing the drum body wears down. Driven by the elastic telescopic rod 2, the sealing gasket 5 slides in the sealing groove, bringing the worn surface of the sealing gasket 5 closer to the solid. This fills the gap between the sealing gasket 5 and the solid caused by wear, preventing material leakage. When the sealing gasket 5 needs to be replaced, the sealing side plate 3 is removed, allowing the sealing gasket 5 to be replaced.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An end-face sealing structure for an aging drum, comprising a rotating part and a fixing part, wherein the rotating part is a conical ring originally mounted on the drum body, and the fixing part is mounted on the drum cover (8), characterized in that, The fixing part includes a sealing side plate (3) connected to the drum cover (8) by bolts (6). A sealing pressure plate (4) and an inner liner plate (7) are installed on the side of the sealing side plate (3) facing the drum body. The sealing pressure plate (4) is located outside the inner liner plate (7). A sealing groove is left between the sealing pressure plate (4) and the inner liner plate (7). A push plate (11) is installed in the sealing groove. The push plate (11) slides in the sealing groove. A sealing gasket (5) is installed on the side of the push plate (11) facing the drum body. The other side of the push plate (11) is connected to a plurality of elastic telescopic rods (2) installed on the sealing side plate (3).

2. The end-face sealing structure for an aging drum according to claim 1, characterized in that, The elastic telescopic rod (2) includes a sleeve (202) fixed on the sealing side plate (3). One end of the sleeve (202) is equipped with an end plate (206). A slider (203) is slidably installed inside the sleeve (202). A first connecting rod (201) and a second connecting rod (205) connected to the push plate (11) are respectively installed at both ends of the slider (203). A spring (204) is provided between the slider (203) and the end plate (206).

3. The end-face sealing structure for an aging drum according to claim 1, characterized in that, The push plate (11) has a plurality of uniform anti-slip protrusions (10) installed on the side facing the sealing gasket (5).

4. The end-face sealing structure for an aging drum according to claim 3, characterized in that, The anti-slip protrusion (10) is a rectangular anti-slip block.

5. The end-face sealing structure for an aging drum according to claim 2, characterized in that, The outer ends of multiple second links (205) are connected to pressure rings (1).

6. The end-face sealing structure for an aging drum according to claim 1, characterized in that, Multiple guide posts (9) with a semi-circular cross-section are evenly installed on the outer surface of the push plate (11).

7. The end-face sealing structure for an aging drum according to claim 1, characterized in that, Both the sealing pressure plate (4) and the inner lining plate (7) are annular and welded to the sealing side plate (3).

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