Quickly detachable manhole sealing structure of glass-lined reaction kettle

Abstract

The utility model relates to the technical field of manhole sealing structure, especially a kind of manhole sealing structure of quick detachable glass lining reaction kettle, including manhole pipe and sealing flange cover, the top end of the manhole pipe is fixedly connected with top ring, the outer surface of the manhole pipe is fixedly connected with the first support frame, second support frame of symmetrical arrangement.The utility model has the advantages that in double sealing structure, first sealing ring is as main sealing, directly with top ring top surface adhesion, assumes main sealing effect;Second sealing ring is as emergency seal, with sealing flange cover bottom surface adhesion, when first sealing ring appears abrasion or failure due to long-term use, second sealing ring can still maintain sealing effect, avoid reaction medium leakage.Top ring top surface partition ring separates two sealing rings, prevent mutual interference, ensure double sealing structure independent function, even if one of sealing ring is damaged, another can still guarantee sealing structure normal use.

Description

Technical Field

[0001] This utility model relates to the technical field of manhole sealing structure, and in particular to a manhole sealing structure for a glass-lined reaction vessel that can be quickly disassembled. Background Technology

[0002] Glass-lined reaction vessels in the fields of biotechnology and new medicine are key equipment used in processes such as drug synthesis and bio-fermentation. They are defined as reaction vessels in which a corrosion-resistant protective layer is formed on the surface of a metal tank using glass-lined coating technology. Materials are mixed and reacted through jacketed heating and a stirring system. Specifically, the main body of the equipment consists of a carbon steel or stainless steel tank and a glass-lined layer. The glass-lined layer has properties such as resistance to strong acids and alkalis, high temperature resistance, and a smooth surface that prevents materials from adhering. It is commonly used in antibiotic synthesis, vaccine preparation, and biopharmaceutical production.

[0003] The existing manhole sealing structure of glass-lined reaction vessels presents a significant technical bottleneck. This structure typically uses a flange cover connected to the tank flange by bolts, with a sealing ring embedded inside the flange cover. Sealing is achieved by compressing and deforming the sealing ring using the pre-tightening force of the bolts. However, in biopharmaceutical and new pharmaceutical production, the sealing ring is in prolonged contact with highly corrosive liquids, high-temperature steam, or particulate materials, making it prone to swelling, hardening, and cracking. When the sealing ring fails, the traditional structure requires shutting down the machine, removing all bolts, and removing the flange cover to replace it. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a quick-disassembly manhole sealing structure for glass-lined reaction vessels, in order to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides a quick-disassembly manhole sealing structure for a glass-lined reactor, comprising a manhole tube and a sealing flange cover. A top ring is fixedly connected to the top of the manhole tube. A first support frame and a second support frame are symmetrically arranged and fixedly connected to the outer surface of the manhole tube. An L-shaped locking frame is rotatably connected inside the first support frame. Two symmetrically arranged mounting plates are fixedly connected to the top surface of the sealing flange cover, and both mounting plates are connected to the L-shaped locking frame by bolts. A screw is rotatably connected to the inner wall of the second support frame, and a threaded sleeve is threaded onto the outer surface of the screw. A pressure plate is rotatably connected to the bottom of the threaded sleeve via a bearing. The bottom surface of the pressure plate is in contact with the top surface of the L-shaped locking frame. A first sealing ring is fixedly connected to the bottom surface of the sealing flange cover, and the bottom surface of the first sealing ring is in contact with the top surface of the top ring. A second sealing ring is fixedly connected to the top surface of the top ring, and the top surface of the second sealing ring is in contact with the bottom surface of the sealing flange cover.

[0007] Preferably, in any of the above embodiments, the L-shaped locking frame has an clearance slot on the side away from the first support frame, and the screw is slidably connected to the L-shaped locking frame through the clearance slot.

[0008] Preferably, in any of the above embodiments, two reinforcing ribs are fixedly connected between the two mounting plates, and both reinforcing ribs are located above the sealing flange cover.

[0009] Preferably, in any of the above embodiments, the first sealing ring and the second sealing ring are both made of fluororubber, and a partition ring is fixedly connected to the top surface of the top ring, the partition ring being located between the first sealing ring and the second sealing ring.

[0010] Preferably, in any of the above solutions, the bottom surface of the pressure plate is fixedly connected to two symmetrically arranged pins, both of which are inserted into the top of the L-shaped locking frame.

[0011] Preferably, in any of the above embodiments, the top surface of the top ring is fixedly connected to a centering ring coaxial with the manhole pipe, and the bottom surface of the sealing flange cover is provided with a centering groove, with the centering ring located inside the groove.

[0012] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0013] 1. Both the first and second sealing rings are made of acid and alkali resistant fluororubber, possessing excellent corrosion resistance and high-temperature resistance, making them suitable for highly corrosive environments in the biological and pharmaceutical fields. In the dual-seal structure, the first sealing ring serves as the main seal, directly contacting the top surface of the top ring and undertaking the primary sealing function; the second sealing ring serves as an emergency seal, contacting the bottom surface of the sealing flange cover. When the first sealing ring wears or fails due to long-term use, the second sealing ring can still maintain the sealing effect, preventing leakage of the reaction medium. The separator ring on the top surface of the top ring separates the two sealing rings, preventing mutual interference and ensuring that each of the dual sealing structures functions independently. Even if one sealing ring is damaged, the other can still ensure the normal operation of the sealing structure, significantly improving the safety and reliability of the sealing system.

[0014] 2. A quick-opening clamp design using an L-shaped locking frame and pressure plate replaces the traditional bolt fastening method. During operation, simply rotating the screw raises and lowers the threaded sleeve, and the pressure plate clamps the L-shaped locking frame, quickly locking or unlocking the sealing flange cover and top ring. Compared to the traditional method of disassembling bolts one by one, this significantly reduces the manhole opening / closing time. The pin at the bottom of the pressure plate is inserted into the top of the L-shaped locking frame, preventing the L-shaped locking frame from rotating in the locked state. Combined with the first support frame's rotational support for the L-shaped locking frame, this significantly improves the stability of the locking structure, ensuring that the sealing flange cover will not loosen due to vibration or other factors during reactor operation.

[0015] 3. The centering ring on the top surface of the top ring mates with the centering groove on the bottom surface of the sealing flange cover, forming a self-centering guiding structure. When installing the sealing flange cover, the centering ring automatically inserts into the centering groove, guiding the sealing flange cover to accurate alignment. This ensures precise contact between the first and second sealing rings and the sealing surface of the top ring, avoiding the risk of leakage due to human error during installation. This self-centering design requires no additional positioning tools or complex operations, improving installation efficiency and ensuring uniform stress on the sealing surface, further enhancing the reliability of the sealing structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first working state structure of the assembly of this utility model;

[0017] Figure 2 This is a schematic diagram of the second working state structure of the assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the sealing flange cover of this utility model;

[0019] Figure 4 This is a schematic diagram of the top ring structure of this utility model.

[0020] In the diagram: 1-Manhole pipe, 2-Sealing flange cover, 3-Top ring, 4-First support frame, 5-Second support frame, 6-L-type locking frame, 7-Mounting plate, 8-Screw, 9-Threaded sleeve, 10-Pressure plate, 11-First sealing ring, 12-Second sealing ring, 13-Allowing groove, 14-Reinforcing rib, 15-Separating ring, 16-Pin, 17-Centering ring, 18-Centering groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0022] like Figures 1 to 4 As shown, a quick-disassembly glass-lined reactor manhole sealing structure includes a manhole pipe 1 and a sealing flange cover 2. A top ring 3 is fixedly connected to the top of the manhole pipe 1. A first support frame 4 and a second support frame 5 are symmetrically arranged and fixedly connected to the outer surface of the manhole pipe 1. An L-shaped locking frame 6 is rotatably connected inside the first support frame 4. Two symmetrically arranged mounting plates 7 are fixedly connected to the top surface of the sealing flange cover 2. Both mounting plates 7 are connected to the L-shaped locking frame 6 by bolts. A screw 8 is rotatably connected to the inner wall of the second support frame 5. A threaded sleeve 9 is threadedly connected to the outer surface of the screw 8. A pressure plate 10 is rotatably connected to the bottom of the threaded sleeve 9 through a bearing. The bottom surface of the pressure plate 10 is in contact with the top surface of the L-shaped locking frame 6. A first sealing ring 11 is fixedly connected to the bottom surface of the sealing flange cover 2. The bottom surface of the first sealing ring 11 is in contact with the top surface of the top ring 3. A second sealing ring 12 is fixedly connected to the top surface of the top ring 3. The top surface of the second sealing ring 12 is in contact with the bottom surface of the sealing flange cover 2.

[0023] As an optional technical solution of this utility model, the L-shaped locking frame 6 has an avoidance slot 13 on the side away from the first support frame 4. The screw 8 is slidably connected to the L-shaped locking frame 6 through the avoidance slot 13. This design allows the screw 8 to move along the avoidance slot 13 during the lifting process, avoiding interference with the L-shaped locking frame 6, ensuring that the pressure plate 10 can smoothly press or release the L-shaped locking frame 6, while allowing the L-shaped locking frame 6 to rotate within a certain range to adapt to the fine adjustment of the position when installing the sealing flange cover 2, thus improving the operational flexibility and compatibility of the quick-opening structure.

[0024] As an optional technical solution of this utility model, two reinforcing ribs 14 are fixedly connected between the two mounting plates 7. Both reinforcing ribs 14 are located above the sealing flange cover 2. The reinforcing ribs 14 can enhance the structural strength of the mounting plates 7 and prevent the mounting plates 7 from deforming under the locking force of the L-shaped locking frame 6. This ensures that the sealing surfaces of the sealing flange cover 2 and the top ring 3 are evenly stressed, avoiding sealing failure caused by deformation of the mounting plates 7. At the same time, it improves the overall impact and vibration resistance of the sealing flange cover 2.

[0025] As an optional technical solution of this utility model, the first sealing ring 11 and the second sealing ring 12 are both made of fluororubber. A partition ring 15 is fixedly connected to the top surface of the top ring 3. The partition ring 15 is located between the first sealing ring 11 and the second sealing ring 12. The acid and alkali resistance and high temperature resistance of fluororubber can adapt to the corrosive working conditions in the reaction vessel and extend the service life of the sealing rings. The partition ring 15 separates the two sealing rings to form an independent sealing area. When one sealing ring is damaged, the other can still maintain the sealing effect. The double sealing structure significantly improves the safety redundancy of the sealing system. At the same time, the partition ring 15 can also prevent the two sealing rings from being squeezed and deformed during installation or use, ensuring sealing reliability.

[0026] As an optional technical solution of this utility model, the bottom surface of the pressure plate 10 is fixedly connected with two symmetrically arranged pins 16. Both pins 16 are inserted into the top of the L-shaped locking frame 6. The pins 16 on the bottom surface of the pressure plate 10 are inserted into the top of the L-shaped locking frame 6, which can form a positioning constraint when the pressure plate 10 presses the L-shaped locking frame 6, preventing the L-shaped locking frame 6 from rotating or shifting, ensuring that the locking force is evenly transmitted to the sealing flange cover 2, and avoiding the problem of uneven force on the sealing surface caused by the displacement of the L-shaped locking frame 6. At the same time, the insertion structure of the pins 16 enhances the connection stability between the pressure plate 10 and the L-shaped locking frame 6, so that the entire quick-opening locking structure can still maintain reliable locking under vibration environment.

[0027] As an optional technical solution of this utility model, the top surface of the top ring 3 is fixedly connected to a centering ring 17 coaxial with the manhole pipe 1, and the bottom surface of the sealing flange cover 2 is provided with a centering groove 18. The centering ring 17 is located inside the groove 18. The centering ring 17 on the top surface of the top ring 3 and the centering groove 18 on the bottom surface of the sealing flange cover 2 cooperate to form a self-centering guide structure. When installing the sealing flange cover 2, the centering ring 17 automatically inserts into the centering groove 18, guiding the sealing flange cover 2 to be accurately aligned, ensuring that the first sealing ring 11, the second sealing ring 12 and the sealing surface of the top ring 3 are completely in contact, avoiding the risk of leakage caused by human installation deviation. At the same time, this structure does not require additional positioning tools, which can improve installation efficiency, ensure uniform force on the sealing surface, and further improve sealing performance.

[0028] A quick-disassembly manhole sealing structure for a glass-lined reactor operates on the following principle:

[0029] 1) In the double sealing structure, the first sealing ring 11 serves as the main seal, directly fitting with the top surface of the top ring 3 and undertaking the main sealing function; the second sealing ring 12 serves as an emergency seal, fitting with the bottom surface of the sealing flange cover 2. When the first sealing ring 11 wears or fails due to long-term use, the second sealing ring 12 can still maintain the sealing effect and prevent leakage of the reaction medium.

[0030] 2) The quick-opening clamp design, which uses an L-shaped locking bracket 6 in conjunction with a pressure plate 10, replaces the traditional bolt fastening method. During operation, simply rotate the screw 8 to raise and lower the threaded sleeve 9, and the pressure plate 10 will press the L-shaped locking bracket 6 to quickly lock or unlock the sealing flange cover 2 and the top ring 3.

[0031] 3): The centering ring 17 on the top surface of the top ring 3 and the centering groove 18 on the bottom surface of the sealing flange cover 2 cooperate to form a self-centering guide structure. When the sealing flange cover 2 is installed, the centering ring 17 automatically inserts into the centering groove 18, guiding the sealing flange cover 2 to be accurately aligned, ensuring that the first sealing ring 11 and the second sealing ring 12 are precisely fitted with the sealing surface of the top ring 3.

[0032] In summary, the quick-release glass-lined reactor manhole sealing structure utilizes acid- and alkali-resistant fluororubber for both the first sealing ring 11 and the second sealing ring 12, exhibiting excellent corrosion resistance and high-temperature performance, making it suitable for the highly corrosive conditions in the biological and pharmaceutical fields. In the dual-sealing structure, the first sealing ring 11 serves as the primary seal, directly contacting the top surface of the top ring 3 and undertaking the main sealing function. The second sealing ring 12 acts as an emergency seal, contacting the bottom surface of the sealing flange cover 2. Even if the first sealing ring 11 wears out or fails due to long-term use, the second sealing ring 12 can still maintain its sealing effect, preventing leakage of the reaction medium. The separating ring 15 on the top surface of the top ring 3 separates the two sealing rings, preventing mutual interference and ensuring that each of the dual sealing structures functions independently. Even if one sealing ring is damaged, the other can still ensure normal operation of the sealing structure, significantly improving the safety and reliability of the sealing system. A quick-opening clamp design using an L-shaped locking bracket 6 and a pressure plate 10 replaces the traditional bolt fastening method. During operation, simply rotating the screw 8 drives the threaded sleeve 9 to rise and fall, and the pressure plate 10 presses the L-shaped locking frame 6, quickly locking or unlocking the sealing flange cover 2 and the top ring 3. Compared with the traditional method of disassembling bolts one by one, this significantly shortens the manhole opening / closing time. The pin 16 at the bottom of the pressure plate 10 is inserted into the top of the L-shaped locking frame 6, preventing the L-shaped locking frame 6 from rotating in the locked state. Together with the first support frame 4, it supports the rotation of the L-shaped locking frame 6, significantly improving the stability of the locking structure and ensuring that the sealing flange cover 2 will not loosen due to vibration or other factors during the operation of the reaction tank. The centering ring 17 on the top surface of the top ring 3 and the centering groove 18 on the bottom surface of the sealing flange cover 2 cooperate to form a self-centering guide structure. When installing the sealing flange cover 2, the centering ring 17 automatically inserts into the centering groove 18, guiding the sealing flange cover 2 to accurate alignment, ensuring that the first sealing ring 11 and the second sealing ring 12 are precisely fitted with the sealing surface of the top ring 3, avoiding the risk of leakage caused by human misalignment during installation. This self-centering design eliminates the need for additional positioning tools or complex operations, improving installation efficiency and ensuring uniform stress on the sealing surface, thereby enhancing the reliability of the sealing structure.

Claims

1. A quick-disassembly manhole sealing structure for a glass-lined reaction vessel, characterized in that: The device includes a manhole pipe and a sealing flange cover. A top ring is fixedly connected to the top of the manhole pipe. A first support frame and a second support frame are symmetrically arranged and fixedly connected to the outer surface of the manhole pipe. An L-shaped locking frame is rotatably connected inside the first support frame. Two symmetrically arranged mounting plates are fixedly connected to the top surface of the sealing flange cover. Both mounting plates are connected to the L-shaped locking frame by bolts. A screw is rotatably connected to the inner wall of the second support frame. A threaded sleeve is threaded onto the outer surface of the screw. A pressure plate is rotatably connected to the bottom of the threaded sleeve via a bearing. The bottom surface of the pressure plate is in contact with the top surface of the L-shaped locking frame. A first sealing ring is fixedly connected to the bottom surface of the sealing flange cover. The bottom surface of the first sealing ring is in contact with the top surface of the top ring. A second sealing ring is fixedly connected to the top surface of the top ring. The top surface of the second sealing ring is in contact with the bottom surface of the sealing flange cover.

2. The quick-disassembly glass-lined reactor manhole sealing structure according to claim 1, characterized in that: The L-shaped locking frame has an clearance slot on the side away from the first support frame, and the screw is slidably connected to the L-shaped locking frame through the clearance slot.

3. The quick-disassembly glass-lined reactor manhole sealing structure according to claim 2, characterized in that: Two reinforcing ribs are fixedly connected between the two mounting plates, and both reinforcing ribs are located above the sealing flange cover.

4. The quick-disassembly glass-lined reactor manhole sealing structure according to claim 3, characterized in that: The first and second sealing rings are both made of fluororubber, and a partition ring is fixedly connected to the top surface of the top ring, which is located between the first and second sealing rings.

5. The quick-disassembly glass-lined reactor manhole sealing structure according to claim 4, characterized in that: The bottom surface of the pressure plate is fixedly connected to two symmetrically arranged pins, both of which are inserted into the top of the L-shaped locking frame.

6. The quick-disassembly glass-lined reactor manhole sealing structure according to claim 5, characterized in that: The top surface of the top ring is fixedly connected to a centering ring coaxial with the manhole pipe, and the bottom surface of the sealing flange cover is provided with a centering groove, with the centering ring located inside the groove.

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