Self-adjusting high-temperature-resistant ring cavity compression sealing structure

Abstract

The utility model relates to a self-adjusting type high-temperature-resistant ring cavity pressing and sealing structure. At present, the traditional problem of poor sealing and expansion of an inner cylinder and an outer cylinder is that a sealing structure capable of absorbing poor expansion is welded or an expansion joint and a common sealing structure are installed, the structure is complex, and installation is troublesome. A self-adjusting type high-temperature-resistant ring cavity pressing sealing structure comprises an inner cylinder flexible sealing felt (3), an outer cylinder flexible sealing felt (4) and an upper flexible sealing felt (6), the inner cylinder flexible sealing felt is arranged on the outer side of an inner cylinder, the outer cylinder flexible sealing felt is arranged on the inner side of an outer cylinder, and the upper flexible sealing felt is arranged above the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt. A sealing pressing plate (7) is arranged above the upper flexible sealing felt, a plurality of sets of compression bolts (5) penetrate into the sealing pressing plate to connect the inner barrel and the outer barrel, and the springs are installed between the compression bolts and the sealing pressing plate in a pre-compression mode. The device is applied to the field of chemical engineering.

Description

Technical Field

[0001] The utility model relates to a self-adjusting high-temperature resistant ring cavity compression sealing structure. Background Art

[0002] In the chemical industry, the phenomenon of expansion difference caused by high temperature difference is quite common. In high temperature environment, the heated components will expand. The traditional solution to the problem of sealing and expansion difference between inner and outer cylinders is to weld a sealing structure that can absorb the expansion difference or install an expansion joint and a common sealing structure. The structure is complex, and the metal expansion joint is expensive. The installation is troublesome and the installation space requirement is relatively high. For equipment containing corrosive gases, the material selection of the expansion joint is more limited and the cost is high. For equipment with a smaller diameter, internal installation is more difficult and it is difficult to ensure sealing. If flange sealing is used, the flange cannot be pre-tightened during operation. Summary of the invention

[0003] The purpose of the utility model is to provide a self-adjusting high-temperature resistant annular cavity compression sealing structure, which will not need to set expansion joints in the equipment, solve the difficulties of internal installation and connection, etc., can effectively improve the installation efficiency and safety, and reduce equipment investment and manufacturing costs.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A self-adjusting high-temperature resistant annular cavity compression sealing structure, comprising an inner cylinder flexible sealing felt, an outer cylinder flexible sealing felt, an upper flexible sealing felt, a sealing pressure plate, compression bolts, springs, washers, etc.; the inner and outer cylinder flexible sealing felts are laid along the outer shapes of the inner and outer cylinders; the upper flexible sealing felt is tightly attached to the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt, and is laid in close contact with the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt; the sealing pressure plate is tightly pressed on the upper flexible sealing felt, and the compression bolts pass through the sealing pressure plate to connect the inner and outer cylinders to ensure a leak-free seal.

[0006] In the self-adjusting high temperature resistant annular cavity compression sealing structure, the inner cylinder flexible seal is laid along the inner cylinder shape, and the outer cylinder flexible sealing felt is laid close to the outer cylinder shape. The inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt can be used in a single layer or in a combination of multiple layers, and there is no gap between the two or it is reserved according to the design. The upper flexible sealing felt is closely attached to the upper part of the inner and outer cylinder flexible sealing felts, and is laid in close contact with the inner and outer cylinder flexible sealing felts, wherein the overlapping width is at least 200mm in each direction to ensure sealing.

[0007] The self-adjusting high-temperature resistant ring cavity compression sealing structure is characterized in that the sealing pressure plate is tightly pressed on the upper flexible sealing felt, and holes that can withstand thermal expansion displacement are opened in pairs on the sealing pressure plate at the positions corresponding to the inner and outer cylinders, and the holes can withstand thermal displacement in two directions perpendicular to each other. The sealing pressure plate used at the top can be made of a whole plate. The sealing pressure plate used at the top can be placed separately in the form of divided pressure plates, each of which is connected by a chain, and the chains are inserted into the holes opened at adjacent locations between the divided sealing pressure plates; bolt connection requires additional connecting plates for easy loading and unloading, or other connection methods can be adopted. The sealing ring plate is in a divided form, and one or more handles are set on each sealing ring plate to facilitate loading and unloading of the sealing ring plate.

[0008] The self-adjusting high temperature resistant annular cavity compression seal structure is used in groups of compression bolts, springs and washers, which are applied to each opening on the sealing pressure plate. The compression bolts pass through the openings on the sealing pressure plate and are connected with threaded holes or welding bolts on the inner and outer cylinders, wherein the springs are compressed by the downward pressure of the bolts and the reaction force transmitted by the sealing pressure plate through the washers.

[0009] Beneficial effects of the utility model:

[0010] 1. The main components of the sealing structure of the utility model include flexible sealing felt, sealing pressure plate, clamping bolts, springs, washers and other components. There is no need to set expansion joints in the equipment. Instead, when the inner and outer cylinders are in a high temperature difference environment, the inner and outer cylinders produce expansion difference, the horizontal flexible sealing felt is compressed when heated, and the paired holes on the sealing pressure plate for inserting clamping bolts are subjected to thermal displacement in two directions perpendicular to each other; the upper part is compressed by the sealing pressure plate, and the vertical spring is compressed or pulled apart to absorb the displacement in the vertical direction, thereby ensuring that there is no leakage between the inner and outer cylinders, and the sealing structure is safe and reliable.

[0011] 2. The utility model provides a self-adjusting high temperature resistant ring cavity compression sealing structure with simple structure, low cost, safe and reliable operation. It solves the difficulties of internal installation and connection, can improve installation efficiency and safety, can adjust itself, is simple to operate, low cost, and reduces equipment investment and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 This is a schematic diagram of the installation structure of the sealing pressure plate of the utility model.

[0014] Figure 3 It is a structural schematic diagram of the sealing pressing plate of the utility model.

[0015] Legend:

[0016] 1. Inner cylinder; 2. Outer cylinder; 3. Inner cylinder flexible sealing felt; 4. Outer cylinder flexible sealing felt; 5. Holding bolt; 6. Upper flexible sealing felt; 7. Sealing pressure plate; 7.1. Longitudinal hole; 7.2. Transverse hole; 8. Handle; 9. Washer; 10. Spring. DETAILED DESCRIPTION Example

[0017] A self-adjusting high-temperature resistant annular cavity compression sealing structure, comprising: an inner cylinder flexible sealing felt 3, an outer cylinder flexible sealing felt 4, an upper flexible sealing felt 6, a sealing pressure plate 7, a clamping bolt 5, and a spring 10; the inner cylinder flexible sealing felt 3 is on the outside of the inner cylinder 1, the outer cylinder flexible sealing felt 4 is on the inside of the outer cylinder 2, the upper flexible sealing felt 6 is above the inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4, the sealing pressure plate 7 is above the upper flexible sealing felt 6, multiple groups of clamping bolts 5 pass through the sealing pressure plate 7 and are respectively connected to the inner cylinder 1 and the outer cylinder 2, and the spring 10 is pre-compressed and installed between the clamping bolt 5 and the sealing pressure plate 7.

[0018] The inner cylinder flexible sealing felt 3 is laid along the shape of the inner cylinder 1, and the outer cylinder flexible sealing felt 4 is laid close to the shape of the outer cylinder 2. The inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4 can be used in a single layer or in a combination of multiple layers, with no gap between them or reserved as designed.

[0019] The upper flexible sealing felt 6 is closely attached to the inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4 , and is laid in close contact with the inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4 .

[0020] The inner tube flexible sealing felt 3, the outer tube flexible sealing felt 4 and the upper flexible sealing felt 6 are resistant to high temperatures, are non-flammable, are flexible and can be placed or laid in any shape, and are compressible and resilient.

[0021] The sealing platen 7 is pressed tightly against the upper flexible sealing felt 6. The sealing platen 7 is provided with longitudinal holes 7.1 and transverse holes 7.2 in pairs to withstand thermal expansion displacement. The longitudinal holes 7.1 and transverse holes 7.2 can withstand thermal displacement in two directions perpendicular to each other respectively. A handle 8 is provided on the sealing platen 7 for easy loading and unloading. Example

[0022] A self-adjusting high temperature resistant annular cavity compression sealing structure, wherein the compression bolt 5, spring 10, and gasket 9 are used in groups, the compression bolt 5 passes through the longitudinal hole 7.1 and the transverse hole 7.2 on the sealing pressure plate 7, and is connected with the threaded holes or welded bolts on the inner tube 1 and the outer tube 2, and the spring 10 is compressed by the downward pressure of the bolt and the reaction force transmitted by the sealing pressure plate 7 through the gasket; the sealing pressure plate 7 can be made of a whole plate to form the sealing pressure plate 7, or can be made of divided plates and placed separately, and each sealing pressure plate 7 is provided with one or more pairs of holes in pairs. The compression bolt 5, spring 10, and gasket 9 are characterized in that the group of compression bolts 5, spring 10, and gasket 9 are used to open transverse holes and longitudinal holes on each sealing pressure plate. Example

[0023] See also Figure 1 A self-adjusting high temperature resistant annular cavity compression sealing structure mainly includes an inner cylinder flexible sealing felt 3, an outer cylinder flexible sealing felt 4, an upper flexible sealing felt 6, a sealing pressure plate 7, a clamping bolt 5, a gasket 8, and a spring 10. The inner cylinder flexible sealing felt 3 is on the outside of the inner cylinder 1, the outer cylinder flexible sealing felt 4 is on the inside of the outer cylinder 2, the upper flexible sealing felt 6 is above the inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4, and the sealing pressure plate 7 is above the upper flexible sealing felt 6. Multiple groups of clamping bolts 5 pass through the sealing pressure plate 7 and are respectively connected to the inner cylinder 1 and the outer cylinder 2. The spring 10 is pre-compressed and installed between the clamping bolt 5 and the sealing pressure plate 7. The inner cylinder flexible sealing felt 3 is laid along the outer shape of the inner cylinder 1, and the outer cylinder flexible sealing felt 4 is laid close to the outer shape of the outer cylinder 2. The inner cylinder flexible sealing felt 3 and the outer cylinder flexible sealing felt 4 can be used in a single layer or in a combination of multiple layers, and there is no gap between the two or it is reserved according to the design. The upper flexible sealing felt 6 is tightly attached to the inner tube flexible sealing felt 3 and the outer tube flexible sealing felt 4, and is laid in close contact with the inner tube flexible sealing felt 3 and the outer tube flexible sealing felt 4, with an overlapping width of at least 200 mm. The sealing plate 7 is tightly pressed on the upper flexible sealing felt 6, and longitudinal holes 7.1 and transverse holes 7.2 are opened in pairs on the sealing plate 7. A group of clamping bolts 5, springs 10, and washers 9 are applied to each longitudinal hole 7.1 and transverse hole 7.2 on the sealing plate. The clamping bolts 5 pass through the holes on the sealing plate 7 and are connected with the threaded holes or welding bolts on the inner tube 1 and the outer tube 2. A handle 8 is provided on the sealing plate 7 for easy loading and unloading.

[0024] When the inner cylinder 1 and the outer cylinder 2 are in a high temperature difference environment, the inner cylinder 1 and the outer cylinder 2 have an expansion difference, the flexible sealing felts 3 and 4 in the horizontal direction are compressed by heat, and the holes in the sealing plate for inserting the clamping bolts in pairs are subjected to thermal displacement in two directions perpendicular to each other; in the vertical direction, the upper part of the flexible sealing felt 6 is compressed by the sealing plate, and the vertical spring is compressed or pulled apart to absorb the displacement in the vertical direction. This ensures that there is no leakage between the inner and outer cylinders, and the sealing structure is safe and reliable.

[0025] See also Figure 2The sealing plate 7 can be made of a whole plate or in blocks. If the blocks are put in and connected, they can be divided into several pieces, not limited to four or several pieces, and the specific number is adjusted and determined according to the actual installation conditions of the equipment. One or more handles are set on each piece to facilitate loading and unloading.

Claims

1. A self-adjusting high temperature resistant ring cavity compression sealing structure, which consists of include: The inner cylinder flexible sealing felt, the outer cylinder flexible sealing felt and the upper flexible sealing felt are characterized in that: the inner cylinder flexible sealing felt is arranged on the outer side of the inner cylinder, the outer cylinder flexible sealing felt is arranged on the inner side of the outer cylinder, the upper flexible sealing felt is arranged above the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt, and a sealing pressure plate is provided above the upper flexible sealing felt, and multiple groups of clamping bolts are inserted into the sealing pressure plate to connect the inner cylinder and the outer cylinder, and a spring is pre-compressed and installed between the clamping bolts and the sealing pressure plate.

2. The self-adjusting high temperature resistant ring cavity compression sealing structure according to claim 1, Its characteristics are: The inner cylinder flexible sealing felt is laid along the inner cylinder shape, and the outer cylinder flexible sealing felt is laid close to the outer cylinder shape. The inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt can be used in a single layer or in a combination of multiple layers, with no gap between them or reserved as designed.

3. The self-adjusting high temperature resistant annular cavity compression sealing structure according to claim 1, Its characteristics are: The upper flexible sealing felt is closely attached to the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt, and is laid in close contact with the inner cylinder flexible sealing felt and the outer cylinder flexible sealing felt.

4. The self-adjusting high temperature resistant annular cavity compression sealing structure according to claim 1, Its characteristics are: The sealing pressing plate is provided with pairs of transverse holes and longitudinal holes capable of withstanding thermal expansion displacement, and a handle is connected to the sealing pressing plate.

5. The self-adjusting high temperature resistant annular cavity compression sealing structure according to claim 4, Its characteristics are: The clamping bolt, spring and washer are used in groups. The clamping bolt passes through the transverse hole and the longitudinal hole on the sealing pressure plate and is respectively connected to the threaded holes or welding bolts on the inner tube and the outer tube. The spring is compressed by the downward pressure of the bolt and the reaction force transmitted by the sealing pressure plate through the washer.

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