Sealing gasket for soda ash tower

Abstract

This utility model discloses a sealing gasket for soda ash tower equipment, belonging to the field of sealing technology for soda ash production equipment. The key technical features include an annular sealing gasket body, comprising a reinforcing metal skeleton layer, an inner corrosion-resistant elastic layer, and an outer reinforcing fiber layer, arranged sequentially from the inside out. The upper and lower surfaces of the annular sealing gasket body are integrally formed with wavy sealing lips, which are evenly distributed along the circumference of the annular sealing gasket body. By using the inner corrosion-resistant elastic layer as a base, the outer reinforcing fiber layer and corrosion-resistant coating for protection, and the stability of the reinforcing metal skeleton layer, the problems of aging, cracking, and leakage of traditional sealing gaskets can be solved. This significantly extends the service life of the sealing gasket in highly corrosive media (ammonia, chloride salts, acidic condensates, etc.), reduces the frequency of downtime replacement, and ensures production continuity.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for soda ash production equipment, and in particular to sealing gaskets for soda ash tower equipment. Background Technology

[0002] In the process of soda ash production, tower equipment such as carbonation tower, ammonia stripping tower, absorption tower, washing and condensing tower, and distillation tower are subjected to high temperature, strong corrosion, media scouring and vibration for a long time. The sealing gasket at the flange connection of the tower equipment is a key sealing component, and its performance directly determines the production efficiency and operational safety.

[0003] The existing sealing gaskets for soda ash towers have the following defects: Traditional sealing gaskets are mostly made of single nitrile rubber, asbestos or polytetrafluoroethylene. Nitrile rubber is prone to aging and cracking in highly corrosive media, asbestos has poor temperature resistance and poses safety hazards, and polytetrafluoroethylene is prone to micro-cracks due to erosion by crystallizing media after long-term use, which leads to media leakage and requires frequent shutdowns for replacement, affecting the continuity of production. Furthermore, it lacks corrosion resistance, especially under the influence of media such as ammonia, chloride salts, carbon dioxide, and acidic condensates, resulting in a short service life. In addition, traditional gaskets are mostly planar structures with a small sealing contact area. When the flange is tightened, uneven force can easily cause local sealing surfaces to not fit tightly. This is especially true when tower equipment experiences periodic pressure fluctuations, which significantly increases the risk of leakage.

[0004] Therefore, a matching sealing gasket is proposed for equipment such as soda ash towers. Utility Model Content

[0005] The purpose of this invention is to provide a sealing gasket for soda ash tower equipment. This invention addresses the problems of existing soda ash tower production equipment where sealing gaskets are mostly made of single materials such as nitrile rubber, asbestos, or polytetrafluoroethylene (PTFE). Nitrile rubber is prone to aging and cracking in highly corrosive media, asbestos has poor temperature resistance and poses safety hazards, and PTFE is prone to micro-cracks due to erosion by crystallizing media after long-term use, leading to media leakage and requiring frequent shutdowns for replacement, thus affecting production continuity. Furthermore, traditional sealing gaskets have insufficient corrosion resistance, especially under the action of media such as ammonia, chloride salts, carbon dioxide, and acidic condensates, resulting in a short service life. In addition, traditional sealing gaskets are mostly planar structures with a small sealing contact area, and uneven force during flange tightening can lead to poor sealing of local sealing surfaces, especially when the pressure of tower equipment fluctuates periodically, significantly increasing the risk of leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing gasket for soda ash tower equipment, comprising an annular sealing gasket body, wherein the annular sealing gasket body comprises a reinforcing metal skeleton layer, an inner corrosion-resistant elastic layer, and an outer reinforcing fiber layer, wherein the reinforcing metal skeleton layer, the inner corrosion-resistant elastic layer, and the outer reinforcing fiber layer are arranged sequentially from the inside to the outside, and the upper and lower surfaces of the annular sealing gasket body are integrally formed with a wavy sealing lip, wherein the wavy sealing lip is evenly distributed along the circumference of the annular sealing gasket body; The annular sealing gasket body is provided with metal reinforcing rings on the inner and outer sides, and the metal reinforcing rings are connected to the reinforcing metal fixing frame layer.

[0007] Preferably, the inner corrosion-resistant elastic layer is made of neoprene rubber, and the thickness of the inner corrosion-resistant elastic layer is 2-5mm.

[0008] Preferably, the reinforcing metal skeleton layer is made of Hastelloy or Monel alloy, and the thickness of the reinforcing metal skeleton layer is 0.5-1.5 mm.

[0009] Preferably, the outer reinforcing fiber layer is made of aluminum silicate fiber, and the thickness of the outer reinforcing fiber layer is 1-3 mm.

[0010] Preferably, the surface of the outer reinforcing fiber layer is provided with a corrosion-resistant coating, and the corrosion-resistant coating is a polytetrafluoroethylene coating.

[0011] Preferably, each of the metal reinforcing rings has a connecting piece on one side, and the other end of the connecting piece passes through the outer reinforcing fiber layer and the inner corrosion-resistant elastic layer in sequence and is welded to the reinforcing metal fixing frame layer.

[0012] Preferably, the annular sealing gasket body has a plurality of mounting holes arranged in a ring shape inside, and hollow positioning pins are provided inside the mounting holes. Both ends of the hollow positioning pins protrude from the upper and lower surfaces of the annular sealing gasket body.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This application uses an inner corrosion-resistant elastic layer as a base, an outer reinforcing fiber layer and a corrosion-resistant coating for protection, and an enhanced metal skeleton layer for stability. This can solve the problems of aging, cracking and leakage of traditional gaskets, significantly extend the service life of gaskets in highly corrosive media (ammonia, chloride salts, acidic condensate, etc.), reduce the frequency of downtime replacement, ensure production continuity, and the gasket surface adopts a wave-shaped sealing lip design, which can expand the sealing contact area. Even if the equipment has periodic pressure fluctuations or slight vibrations, it can still maintain a tight seal and greatly reduce the risk of leakage. 2. The reinforced metal framework layer and the outer reinforced fiber layer of the present application form a composite structure of rigid support and flexible buffering, which can not only resist deformation under high temperature and high pressure, but also withstand medium erosion and wear, and in combination with the design of the metal reinforcing ring and the hollow positioning pin, can simplify the installation process of the gasket and ensure accurate docking between the gasket and the flange. Description of Drawings

[0014] Figure 1 is an overall structural diagram of the gasket matched with soda ash tower equipment of the present utility model; Figure 2 is a cross-sectional schematic view of the annular gasket main body of the present utility model; Figure 3 is a cross-sectional schematic view of the annular gasket main body and the positioning pin of the present utility model; Figure 4 is a front cross-sectional schematic view of the annular gasket main body of the present utility model.

[0015] In the figures, 1. annular gasket main body; 2. reinforced metal framework layer; 3. inner corrosion-resistant elastic layer; 4. outer reinforced fiber layer; 5. wavy sealing lip; 6. metal reinforcing ring; 7. positioning pin; 8. connecting piece. Detailed Description of the Embodiments

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1-4 , the present utility model provides a technical solution: A gasket matched with soda ash tower equipment, comprising an annular gasket main body 1, wherein the annular gasket main body 1 comprises a reinforced metal framework layer 2, an inner corrosion-resistant elastic layer 3 and an outer reinforced fiber layer 4, the reinforced metal framework layer 2, the inner corrosion-resistant elastic layer 3 and the outer reinforced fiber layer 4 are sequentially arranged from inside to outside, wavy sealing lips 5 are integrally formed on the upper and lower surfaces of the annular gasket main body 1, and the wavy sealing lips 5 are uniformly distributed along the circumferential direction of the annular gasket main body 1; metal reinforcing rings 6 are arranged on the inner side and the outer side of the annular gasket main body 1, and the metal reinforcing rings 6 are connected with the reinforced metal framework layer.

[0018] In this embodiment, the composite structure consisting of a reinforced metal skeleton layer 2, an inner corrosion-resistant elastic layer 3, and an outer reinforcing fiber layer 4, arranged from the inside out, achieves a synergistic effect of corrosion resistance, high strength, and wear resistance. The inner elastic layer provides basic sealing elasticity and initial corrosion resistance, the reinforced metal skeleton layer 2 enhances the overall structural rigidity and resists deformation under high temperature and pressure, while the outer reinforcing fiber layer 4 withstands media erosion and prevents direct wear of the inner elastic layer. Furthermore, wavy sealing lips 5 are provided on the upper and lower surfaces of the annular sealing gasket body 1, and these wavy sealing lips 5 are evenly distributed circumferentially along the annular sealing gasket body 1. Compared to traditional planar sealing structures, this significantly improves the sealing performance. By expanding the sealing contact area and forming a multi-line contact seal, the wavy sealing lip 5 can adapt to the slight unevenness or thermal deformation of the flange surface through elastic deformation when the flange is tightened. Even if there is a local deviation in the fit, the remaining sealing lips can still maintain the sealing effect, avoiding leakage caused by uneven force. Moreover, the metal reinforcing rings 6 on the inner and outer sides of the annular sealing gasket body 1 are connected to the reinforcing metal skeleton layer 2. On the one hand, it enhances the edge strength of the sealing gasket and prevents edge tearing and deformation during installation or use. On the other hand, it restricts the overall radial displacement of the sealing gasket, avoids the sealing gasket displacement caused by equipment vibration, ensures the stability of the sealing position during long-term use, and further reduces the risk of leakage.

[0019] Specifically, such as Figure 2 As shown, the inner corrosion-resistant elastic layer 3 is made of neoprene rubber, and the thickness of the inner corrosion-resistant elastic layer is 2-5mm.

[0020] Specifically, such as Figure 2 As shown, the reinforcing metal skeleton layer 2 is made of Hastelloy or Monel alloy, and the thickness of the reinforcing metal skeleton layer 2 is 0.5-1.5mm.

[0021] Specifically, such as Figure 2 As shown, the outer reinforcing fiber layer 4 is made of aluminum silicate fiber, and the thickness of the outer reinforcing fiber layer 4 is 1-3 mm.

[0022] Specifically, such as Figure 2 As shown, the surface of the outer reinforcing fiber layer 4 is provided with a corrosion-resistant coating, and the corrosion-resistant coating is a polytetrafluoroethylene coating.

[0023] In this embodiment: the inner corrosion-resistant elastic layer 3 is made of chloroprene rubber. Chloroprene rubber has excellent resistance to strong corrosive media such as ammonia, chloride salts, and acidic condensates in soda ash production, effectively resisting media erosion and avoiding the problems of easy aging and cracking of traditional nitrile rubber and the easy formation of micro-cracks in polytetrafluoroethylene. At the same time, chloroprene rubber has moderate elasticity, allowing for reasonable deformation during flange tightening, tightly fitting the sealing surface, and is not prone to elasticity loss due to high temperatures during long-term use, ensuring stable sealing performance. The reinforcing metal skeleton layer 2 is made of Hastelloy or Monel alloy, both high-performance corrosion-resistant metal materials used in soda ash equipment. They can work stably for a long time under high temperature and strong corrosion conditions, avoiding structural failure caused by corrosion and rust of traditional metal skeletons (such as ordinary stainless steel). The reinforcing fiber layer is made of aluminosilicate fiber, which can withstand the high-temperature environment of soda ash tower equipment. It does not soften or burn during long-term use, avoiding the aging and shedding caused by the poor temperature resistance of traditional fiber layers (such as ordinary glass fiber). At the same time, the interwoven fiber structure of aluminosilicate fiber has good erosion resistance and can directly withstand the erosion of the medium (including crystalline particles) inside the equipment, protecting the inner corrosion-resistant elastic layer 3 from wear. The outer reinforcing fiber layer 4 is used in conjunction with the polytetrafluoroethylene corrosion-resistant coating on its surface to form a double protective structure of fiber layer and coating. It can resist the erosion of various strong corrosive media (ammonia, chloride salts, acidic condensate, etc.) in soda ash production, avoid the aging and degradation of the reinforcing fiber layer caused by media penetration, and further extend the service life of the fiber layer.

[0024] Specifically, such as Figure 2 As shown, each of the metal reinforcing rings 6 has a connecting piece 8 on one side, and the other end of the connecting piece 8 passes through the outer reinforcing fiber layer 4 and the inner corrosion-resistant elastic layer 3 in sequence and is welded to the reinforcing metal skeleton layer.

[0025] In this embodiment, the metal reinforcing ring 6 is welded to the reinforcing metal skeleton layer 2 through the connecting piece 8 to form an integrated structure of the reinforcing ring, the connecting piece 8 and the skeleton layer. This can solve the problem of structural looseness caused by the separation of the reinforcing ring and the skeleton layer in traditional sealing gaskets, and realize the rigid connection between the metal reinforcing ring 6 and the reinforcing metal skeleton layer 2.

[0026] Specifically, such as Figure 3 As shown, the annular sealing gasket body 1 has several mounting holes arranged in a ring shape inside, and hollow positioning pins 7 are provided inside the mounting holes. Both ends of the hollow positioning pins 7 protrude from the upper and lower surfaces of the annular sealing gasket body 1.

[0027] In this embodiment: the mounting hole inside the annular sealing gasket body 1 cooperates with the hollow positioning pin 7 to achieve precise positioning and convenient installation of the sealing gasket. Since the two ends of the hollow positioning pin 7 protrude from the surface of the sealing gasket, it can be directly inserted into the corresponding positioning hole of the soda ash tower flange during installation, quickly completing the concentric alignment of the sealing gasket and the flange, avoiding the uneven sealing surface caused by easy displacement and misalignment during the installation of traditional sealing gaskets.

[0028] Working principle: When the annular sealing gasket body 1 is used, the inner corrosion-resistant elastic layer 3 is used as the base, and the outer reinforcing fiber layer 4 and corrosion-resistant coating are used for protection. Combined with the stability of the reinforced metal skeleton layer 2, the problems of aging, cracking and leakage of traditional sealing gaskets can be solved. It significantly extends the service life of the sealing gasket in highly corrosive media (ammonia, chloride salts, acidic condensate, etc.), reduces the frequency of downtime replacement, and ensures production continuity. In addition, the sealing gasket surface adopts a wave-shaped sealing lip 5 design, which can expand the sealing contact area. Even if the equipment has periodic pressure fluctuations or slight vibrations, it can still maintain a tight seal and greatly reduce the risk of leakage. The reinforced metal skeleton layer 2 and the outer reinforcing fiber layer 4 can form a composite structure of rigid support and flexible buffer. It can not only resist deformation under high temperature and high pressure, but also withstand the erosion and wear of the medium. In addition, the design of the metal reinforcing ring 6 and the hollow positioning pin 7 can simplify the installation process of the sealing gasket and ensure precise docking between the sealing gasket and the flange.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing gasket for soda ash tower equipment, comprising an annular sealing gasket body (1), characterized in that: The annular sealing gasket body (1) includes a reinforced metal skeleton layer (2), an inner corrosion-resistant elastic layer (3) and an outer reinforced fiber layer (4). The reinforced metal skeleton layer (2), the inner corrosion-resistant elastic layer (3) and the outer reinforced fiber layer (4) are arranged sequentially from the inside to the outside. The upper and lower surfaces of the annular sealing gasket body (1) are integrally formed with a wavy sealing lip (5). The wavy sealing lip (5) is evenly distributed along the circumference of the annular sealing gasket body (1). The inner and outer sides of the annular sealing gasket body (1) are provided with metal reinforcing rings (6), and the metal reinforcing rings (6) are connected to the reinforcing metal fixing frame layer.

2. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: The inner corrosion-resistant elastic layer (3) is made of neoprene rubber, and the thickness of the inner corrosion-resistant elastic layer is 2-5mm.

3. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: The reinforcing metal skeleton layer (2) is made of Hastelloy or Monel alloy, and the thickness of the reinforcing metal skeleton layer (2) is 0.5-1.5mm.

4. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: The outer reinforcing fiber layer (4) is made of aluminum silicate fiber, and the thickness of the outer reinforcing fiber layer (4) is 1-3 mm.

5. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: The surface of the outer reinforcing fiber layer (4) is provided with a corrosion-resistant coating, and the corrosion-resistant coating is a polytetrafluoroethylene coating.

6. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: Each of the two metal reinforcing rings (6) has a connecting piece (8) on one side opposite to the other, and the other end of the connecting piece (8) passes through the outer reinforcing fiber layer (4) and the inner corrosion-resistant elastic layer (3) in sequence and is welded to the reinforcing metal fixing frame layer.

7. The sealing gasket for soda ash tower equipment according to claim 1, characterized in that: The annular sealing gasket body (1) has several mounting holes in a ring shape inside, and hollow positioning pins (7) are provided inside the mounting holes. Both ends of the hollow positioning pins (7) protrude from the upper and lower surfaces of the annular sealing gasket body (1).

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