A polycondensation reactor for resin production

By designing a polycondensation kettle containing stirring, heating and cleaning components, the existing polycondensation kettle structure is solved and the lack of cleaning devices is lacking, efficient cleaning and uniform heating of the inner wall of the kettle body is achieved, and production efficiency is improved.

CN222724330UActive Publication Date: 2025-04-08JIANGSU BEGUDE CHEM CO LTD
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Patent Information

Application Number
CN202421498053.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-28
Publication Date
2025-04-08
Estimated Expiration
2034-06-28

AI Technical Summary

Technical Problem

The existing polycondensation kettle has a single structure and lacks cleaning devices to the inner wall of the kettle body, resulting in low production efficiency.

Method used

A polycondensation kettle is designed including a stirring assembly, a heating assembly and a cleaning assembly. The stirring assembly is stirred by a large motor driving the stirring rod, the heating assembly is uniformly heated by a heating plate and thermal oil, and the cleaning assembly is cleaned by a scraper and a brush.

Benefits of technology

The internal wall of the kettle body is effectively cleaned, avoiding the problem of uneven reaction caused by resin adhesion, and improving production efficiency through uniform heating.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a polycondensation kettle for resin production, which relates to the technical field of resin production, comprising a kettle body, and also comprising a stirring component, which is arranged on the top of the kettle body and is equipped to stir raw materials, a heating component, which is arranged inside the kettle body and is equipped to heat the inside of the kettle body by heating heat-conducting oil through a heating plate, and a cleaning component, which is arranged on the inner side of the kettle body and is equipped to clean the inner wall of the kettle body. The utility model is provided with a cleaning component, and a large motor is started to drive a stirring rod to stir detergent and water to wash the inner wall of the kettle body. At the same time, the large motor drives a scraper to scrape the inner wall of the kettle body through a link plate, and the scraper drives a support plate and a brush through an arc plate to brush the scraped inner wall of the kettle body again, thereby achieving the purpose of cleaning the inner wall of the kettle body.
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Description

Technical Field

[0001] The utility model relates to the technical field of resin production, in particular to a polycondensation kettle for resin production. Background Art

[0002] The polycondensation reactor is an indispensable device in the production of resins. In the polycondensation reactor, the hydroxyl compounds produced by the transesterification reaction may undergo a polycondensation reaction to form high molecular weight polyhydroxy compounds. These polyhydroxy compounds may have cross-linking properties, which is the basis for the formation of resins. At the same time, they can provide a relatively closed and stable space for the reactants. The temperature control device can control the heating plate, stirring device, etc., and accurately control the temperature, stirring degree and other conditions required for the reaction to promote the smooth progress of the reaction and ensure the consistency and controllability of the reaction. The stirring function helps to make different reactants fully and evenly mixed and contacted, thereby improving the reaction efficiency and reaction degree.

[0003] Application document: CN216024826U, discloses a bisphenol A epoxy resin polycondensation reactor. The above-mentioned public document mainly considers that the stirring shaft is in a swinging state at any time, the stirring direction of the stirring paddle is also changed at any time, and the flow direction of the material changes in real time, thereby greatly improving the efficiency and effect of material mixing.

[0004] The defects of the existing polycondensation kettle are: since the resin has good oil resistance, toughness, wear resistance, aging resistance and adhesion, it will adhere to the inner wall of the reactor after the reaction is completed, so it needs to be flushed after each reaction to avoid subsequent impact on subsequent reactions, and when the reaction needs to be heated, other heating devices need to be used, which increases the cost and cannot avoid uneven heating, thereby reducing production efficiency. Utility Model Content

[0005] The utility model aims to provide a polycondensation kettle for resin production, which can solve the technical problems of the prior art that the polycondensation kettle has a single structure, lacks a cleaning device for the inner wall of the polycondensation kettle, and has poor production efficiency.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a polycondensation kettle for resin production, comprising a kettle body, and

[0007] A stirring assembly is disposed on the top of the kettle body and is configured to stir the raw materials;

[0008] A heating assembly is disposed inside the kettle body and is configured to heat the inside of the kettle body by heating the heat transfer oil through a heating plate;

[0009] The cleaning assembly is arranged on the inner side of the kettle body and is configured to clean the inner wall of the kettle body.

[0010] Specifically, the stirring assembly includes a large motor installed on the top of the kettle through a connecting component, a reducer installed on the outside of the output end of the large motor, a stirring rod installed on the bottom of the output end of the large motor, and the stirring rod is located on the inside of the kettle.

[0011] Specifically, an observation port is installed through the top of the kettle body, a feed pipe is installed through the top of the kettle body, a sealing cover is installed on the outer side of the feed pipe through a thread, and three legs are installed at the bottom of the kettle body.

[0012] Specifically, a heating plate is installed at the bottom of the heating assembly, an oil groove is opened through the bottom of the kettle body, and the oil groove is connected to the inside of the heating plate, an oil inlet pipe is installed through the top of the kettle body, and the oil inlet pipe is connected to the oil groove, and an oil outlet pipe is installed through the bottom of the heating plate.

[0013] Specifically, a solenoid valve is installed on the inner side of the heating plate, and a discharge pipe is installed at the bottom of the solenoid valve.

[0014] Specifically, a discharge box is installed at the bottom of the heating plate, a through groove is opened on the inner side of the discharge box, two solenoid valves are installed at both ends of the discharge box, a small motor is installed through one end of the discharge box, a square groove is opened at the bottom of the through groove, a screw rod is installed at the output end of the small motor, and the screw rod is located on the inner side of the square groove, and a sealing plate is installed on the outer side of the screw rod.

[0015] Specifically, the cleaning assembly includes a T-ring groove on the top wall of the kettle body, an arc plate is placed inside the T-ring groove, a support plate is installed at one end of the arc plate, a brush is installed on the side of the support plate away from the stirring rod, and a scraper is installed at the other end of the arc plate.

[0016] Specifically, a connecting block is installed on the side of the scraper close to the stirring rod, a link plate is installed on the outer side of the stirring rod, an empty groove is opened on the inner side of the link plate, a limiting plate is installed on the inner side of the feed pipe, a clamping column is placed on the inner side of the limiting plate, and the clamping column is located on the inner side of the scraper, a clamping plate is installed on the inner side of one end of the clamping column through a spring, and the clamping plate is located on the inner side of the limiting plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. The utility model is equipped with a cleaning component. When cleaning the inner wall of the kettle body, the staff rotates the sealing cover feed pipe clockwise by hand to separate it, drives the card plate to move out from the inner side of the limiting plate by hand, and then moves the card column out from the inner side of the limiting plate and the scraper, and then places the card column on the inner side of the connecting block and the connecting plate. When the other end of the card plate is aligned with the empty slot, the card plate is released, and the card plate moves into the inner side of the empty slot, the linking plate and the connecting block are connected together, and then the detergent and water are poured from the feed pipe to the inner side of the kettle body, and then the sealing cover is rotated to close the feed pipe, and the large motor is started to drive the stirring rod to stir the detergent and water to rinse the inner wall of the kettle body. At the same time, the large motor drives the scraper to scrape the inner wall of the kettle body through the linking plate, and the scraper drives the support plate and the brush through the arc plate to brush the scraped inner wall of the kettle body again, thereby achieving the purpose of cleaning the inner wall of the kettle body.

[0019] 2. The utility model is equipped with a heating plate. Before adding raw materials, the staff connects the oil inlet pipe to the external oil source through the oil inlet pipeline, connects the oil outlet pipe to the oil outlet pipeline, and then fills the oil tank and the inside of the heating plate with heat transfer oil. The staff starts the large motor and the heating plate at the same time. The heating plate heats the raw materials with the heat transfer oil. The heat transfer oil can heat the raw materials inside the kettle more evenly, avoiding uneven heating of the raw materials and causing insufficient reaction, thereby improving production efficiency.

[0020] 3. The utility model is equipped with a discharge box. After brushing, the large motor is turned off, and the staff controls the small motor to rotate forward. The output end of the small motor drives the screw to rotate forward, and the screw drives the sealing plate to move to the right side of the discharge box, so that the solenoid valve 2 on the right side of the discharge box is closed, and then the solenoid valve 1 is opened, and the sewage after cleaning flows into the recovery pipeline for recovery, so that the reacted materials and sewage can be recovered separately, and the solenoid valve 1 and the discharge pipe can be flushed at the same time to improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the cleaning component of the utility model;

[0024] Figure 4 The cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 5 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0026] Figure 6 for Figure 5 A magnified image of point A;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the discharge box of the utility model.

[0028] In the figure: 1. kettle body; 2. stirring assembly; 21. large motor; 22. stirring rod; 23. reducer; 3. heating assembly; 31. oil inlet pipe; 32. oil tank; 33. heating plate; 34. oil outlet pipe; 4. cleaning assembly; 41. T ring groove; 42. arc plate; 43. link plate; 431. empty groove; 44. support plate; 45. brush; 46. connecting block; 47. scraper; 5. discharge box; 6. observation port; 7. feed pipe; 71. limiting plate; 72. clamping column; 73. clamping plate; 8. cover; 9. support leg; 10. solenoid valve one; 11. outlet pipe; 12. through groove; 13. square groove; 14. small motor; 15. sealing plate; 16. screw rod; 17. solenoid valve two. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a polycondensation kettle for resin production;

[0033] It includes a kettle body 1, and also includes

[0034] A stirring assembly 2 is disposed on the top of the kettle body 1 and is configured to stir the raw materials;

[0035] The heating assembly 3 is disposed inside the kettle body 1 and is configured to heat the inside of the kettle body 1 by heating the heat transfer oil through the heating plate 33;

[0036] The cleaning assembly 4 is disposed on the inner side of the kettle body 1 and is configured to clean the inner wall of the kettle body 1 .

[0037] The stirring assembly 2 includes a large motor 21 installed on the top of the kettle body 1 through a connecting component, a reducer 23 is installed on the outside of the output end of the large motor 21, and a stirring rod 22 is installed at the bottom of the output end of the large motor 21, and the stirring rod 22 is located on the inner side of the kettle body 1.

[0038] An observation port 6 is installed through the top of the kettle body 1 , a feed pipe 7 is installed through the top of the kettle body 1 , a cover 8 is installed on the outer side of the feed pipe 7 through a thread, and three legs 9 are installed at the bottom of the kettle body 1 .

[0039] In this embodiment, the staff can check the progress of the polycondensation reaction through the observation port 6, and the three legs 9 can support the polycondensation reactor at the work site;

[0040] The staff rotates the cover 8 clockwise by hand until the cover 8 is separated from the feed pipe 7, and then pours the raw materials from the feed pipe 7 to the inside of the kettle body 1, and then places the cover 8 on the top of the feed pipe 7 and rotates the cover 8 clockwise to close the feed pipe 7, and then starts the large motor 21 at the same time. The output end of the large motor 21 drives the stirring rod 22 to stir the material to provide conditions for the polycondensation reaction.

[0041] A heating plate 33 is installed at the bottom of the heating assembly 3, an oil groove 32 is opened through the bottom of the kettle body 1, and the oil groove 32 is connected to the inside of the heating plate 33, an oil inlet pipe 31 is installed through the top of the kettle body 1, and the oil inlet pipe 31 is connected to the oil groove 32, and an oil outlet pipe 34 is installed through the bottom of the heating plate 33.

[0042] In this embodiment, before adding the raw materials, the staff connects the oil inlet pipe 31 to the external oil source through the oil inlet pipe 31, connects the oil outlet pipe 34 to the oil outlet pipe 34, and then fills the oil tank 32 and the inner side of the heating plate 33 with heat transfer oil. The staff starts the large motor 21 and the heating plate 33 at the same time. The heating plate 33 heats the raw materials with the heat transfer oil. The heat transfer oil can heat the raw materials on the inside of the kettle body 1 more evenly, avoiding uneven heating of the raw materials and causing insufficient reaction, thereby reducing costs and improving production efficiency.

[0043] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , a polycondensation kettle for resin production;

[0044] The cleaning assembly 4 includes a T-shaped groove 41 on the top wall of the kettle body 1, an arc plate 42 is placed on the inner side of the T-shaped groove 41, a support plate 44 is installed at one end of the arc plate 42, a brush 45 is installed on the side of the support plate 44 away from the stirring rod 22, and a scraper 47 is installed at the other end of the arc plate 42.

[0045] A connecting block 46 is installed on the side of the scraper 47 close to the stirring rod 22, a link plate 43 is installed on the outer side of the stirring rod 22, a slot 431 is opened on the inner side of the link plate 43, a limiting plate 71 is installed on the inner side of the feed pipe 7, a clamping column 72 is placed on the inner side of the limiting plate 71, and the clamping column 72 is located on the inner side of the scraper 47, a clamping plate 73 is installed on the inner side of one end of the clamping column 72 through a spring, and the clamping plate 73 is located on the inner side of the limiting plate 71.

[0046] In this embodiment, the T-ring groove 41 can limit the moving track of the arc plate 42. When cleaning the inner wall of the kettle body 1, the staff rotates the cover 8 clockwise by hand until the cover 8 is separated from the feed pipe 7, and drives the clamping plate 73 to move out from the inner side of the limiting plate 71 by hand, and then moves the clamping column 72 out from the inner side of the limiting plate 71 and the scraper 47, and then places the clamping column 72 on the inner side of the connecting block 46 and the connecting plate. When the other end of the clamping plate 73 is aligned with the empty groove 431, the clamping plate 73 is released, and the clamping plate 73 moves into the inner side of the empty groove 431 under the action of the spring, and the link plate 43 and the connecting block 46 are connected. Connect together, then pour the detergent and water from the feed pipe 7 to the inside of the kettle body 1, then place the cover 8 on the top of the feed pipe 7 and rotate the cover 8 clockwise to close the feed pipe 7, start the large motor 21 to drive the stirring rod 22 to stir the detergent and water, and rinse the inner wall of the kettle body 1, and at the same time, the large motor 21 drives the scraper 47 to scrape the inner wall of the kettle body 1 through the link plate 43, and the scraper 47 drives the support plate 44 and the brush 45 through the arc plate 42 to brush the scraped inner wall of the kettle body 1 again, thereby achieving the purpose of cleaning the inner wall of the kettle body 1.

[0047] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 , a polycondensation kettle for resin production;

[0048] It comprises a solenoid valve 10, a solenoid valve 10 is installed on the inner side of the heating plate 33, and a discharge pipe 11 is installed at the bottom of the solenoid valve.

[0049] A discharge box 5 is installed at the bottom of the heating plate 33, a through slot 12 is provided inside the discharge box 5, solenoid valves 17 are installed at both ends of the discharge box 5, a small motor 14 is installed through one end of the discharge box 5, a square slot 13 is provided at the bottom of the through slot 12, a screw rod 16 is installed at the output end of the small motor 14, and the screw rod 16 is located inside the square slot 13, and a sealing plate 15 is installed outside the screw rod 16.

[0050] In this embodiment, the stirring rod 22 stirs the material, and the heating plate 33 heats the raw material through the heat transfer oil to provide conditions for the polycondensation reaction. After the polycondensation reaction is completed, the staff opens the solenoid valve 10 and the solenoid valve 2 17 on the right side of the discharge box 5, and the material flows into the collection pipeline from the solenoid valve 10, the discharge pipe 11, the through groove 12 and the inner side of the solenoid valve 2 17 in sequence for collection;

[0051] After the scrubbing is completed, the large motor 21 is turned off, and the staff controls the small motor 14 to rotate forward. The output end of the small motor 14 drives the screw rod 16 to rotate forward. The screw rod 16 drives the sealing plate 15 to move to the right side of the discharge box 5 through the meshing action, and the solenoid valve 2 17 on the right side of the discharge box 5 is closed. Then the solenoid valve 10 is opened, and the cleaned sewage flows into the recovery pipeline from the solenoid valve 10, the discharge pipe 11, the through groove 12 and the inner side of the solenoid valve 2 17 in turn for recovery. The reacted materials and sewage can be recovered separately, and the solenoid valve 10 and the discharge pipe 11 can be flushed at the same time to improve the cleaning efficiency.

[0052] Working principle: Before using the device, check whether there are any problems that affect the use of the device. The staff rotates the cover 8 clockwise by hand to separate it from the feed pipe 7, and then pours the raw materials from the feed pipe 7 to the inside of the kettle body 1, and then rotates the cover 8 clockwise to close the feed pipe 7, and then starts the large motor 21 and the heating plate 33 at the same time. The output end of the large motor 21 drives the stirring rod 22 to stir the material, and the heating plate 33 heats the raw material through the heat transfer oil. After the polycondensation reaction is completed, the staff opens the solenoid valve 10 and the solenoid valve 2 17 on the right side of the discharge box 5, and the material flows into the collection pipeline for collection;

[0053] When cleaning the inner wall of the kettle body 1, the staff rotates the cover 8 clockwise by hand to separate it from the feed pipe 7, drives the card plate 73 to move out from the inner side of the limiting plate 71 by hand, and then moves the card column 72 out from the inner side of the limiting plate 71 and the scraper 47, and then places the card column 72 on the inner side of the connecting block 46 and the connecting plate. When the other end of the card plate 73 is aligned with the empty groove 431, the card plate 73 is released, and the card plate 73 moves into the inner side of the empty groove 431 under the action of the spring, connects the link plate 43 and the connecting block 46 together, and then pours the detergent and water from the feed pipe 7 into the inner side of the kettle body 1, and then rotates the cover 8 clockwise to close the feed pipe 7, starts the large motor 21 to drive the stirring rod 22 to stir the detergent and water, and cleans the kettle body. 1 is rinsed, and at the same time, the large motor 21 drives the scraper 47 to scrape the inner wall of the kettle body 1 through the link plate 43, and the scraper 47 drives the support plate 44 and the brush 45 through the arc plate 42 to scrub the scraped inner wall of the kettle body 1 again. After the scrubbing is completed, the large motor 21 is turned off, and the staff controls the small motor 14 to rotate forward. The output end of the small motor 14 drives the screw rod 16 to rotate forward. The screw rod 16 drives the sealing plate 15 to move to the right side of the discharge box 5 through the meshing action, and the electromagnetic valve 2 17 on the right side of the discharge box 5 is closed, and then the electromagnetic valve 10 is opened. The cleaned sewage is recycled by flowing into the recovery pipeline from the electromagnetic valve 10, the discharge pipe 11, the through groove 12 and the inner side of the electromagnetic valve 2 17 in turn.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A polycondensation kettle for resin production, comprising a kettle body (1), characterized in that: Also includes A stirring assembly (2) is disposed on the top of the kettle body (1) and is configured to perform stirring; A heating assembly (3) is arranged inside the kettle body (1) and is configured to heat the inside of the kettle body (1) by heating the heat transfer oil through a heating plate (33); The cleaning assembly (4) is arranged on the inner side of the kettle body (1) and is configured to clean the inner wall of the kettle body (1).

2. The polycondensation reactor for resin production according to claim 1, characterized in that: The stirring assembly (2) comprises a large motor (21) mounted on the top of a kettle body (1) via a connecting component, a reducer (23) mounted on the outside of the output end of the large motor (21), a stirring rod (22) mounted on the bottom of the output end of the large motor (21), and the stirring rod (22) is located on the inner side of the kettle body (1).

3. The polycondensation reactor for resin production according to claim 1, characterized in that: The top of the kettle body (1) is penetrated with an observation port (6), the top of the kettle body (1) is penetrated with a feed pipe (7), the outer side of the feed pipe (7) is threadedly sleeved with a cover (8), and the bottom of the kettle body (1) is installed with three legs (9).

4. The polycondensation reactor for resin production according to claim 1, characterized in that: A heating plate (33) is installed at the bottom of the heating assembly (3); an oil groove (32) is provided through the bottom of the kettle body (1), and the oil groove (32) is connected to the inside of the heating plate (33); an oil inlet pipe (31) is installed through the top of the kettle body (1), and the oil inlet pipe (31) is connected to the oil groove (32); and an oil outlet pipe (34) is installed through the bottom of the heating plate (33).

5. A polycondensation reactor for resin production according to claim 4, characterized in that: A solenoid valve (10) is installed on the inner side of the heating plate (33), and a discharge pipe (11) is installed at the bottom of the solenoid valve.

6. A polycondensation reactor for resin production according to claim 5, characterized in that: A discharge box (5) is installed at the bottom of the heating plate (33), a through groove (12) is provided on the inner side of the discharge box (5), two solenoid valves (17) are installed at both ends of the discharge box (5), a small motor (14) is installed through one end of the discharge box (5), a square groove (13) is provided at the bottom of the through groove (12), a screw rod (16) is installed at the output end of the small motor (14), and the screw rod (16) is located on the inner side of the square groove (13), and a sealing plate (15) is installed on the outer side of the screw rod (16).

7. The polycondensation reactor for resin production according to claim 3, characterized in that: The cleaning assembly (4) comprises a top wall of a kettle body (1) provided with a T-ring groove (41), an arc-shaped plate (42) is placed inside the T-ring groove (41), a support plate (44) is installed at one end of the arc-shaped plate (42), a brush (45) is installed on the side of the support plate (44) away from the stirring rod (22), and a scraper (47) is installed at the other end of the arc-shaped plate (42).

8. The polycondensation reactor for resin production according to claim 7, characterized in that: A connecting block (46) is installed on the side of the scraper (47) close to the stirring rod (22), a link plate (43) is installed on the outer side of the stirring rod (22), a hollow groove (431) is opened on the inner side of the link plate (43), a limiting plate (71) is installed on the inner side of the feeding pipe (7), a clamping column (72) is placed on the inner side of the limiting plate (71), and the clamping column (72) is located on the inner side of the scraper (47), a clamping plate (73) is installed on the inner side of one end of the clamping column (72) through a spring, and the clamping plate (73) is located on the inner side of the limiting plate (71).

Citation Information

Patent Citations

  • Bisphenol A type epoxy resin polycondensation reaction kettle

    CN216024826U