Reaction kettle for polyurethane fender production

Abstract

The application relates to a reaction kettle for polyurethane fender production, and belongs to the technical field of polyurethane fender production, which comprises a tank body, a jacket layer arranged outside the tank body, a manhole and a feeding port communicated with the upper end of the tank body, a steam inlet and a cooling water outlet communicated with the upper end outside of the jacket layer, a cooling water inlet and a condensed water outlet communicated with the lower end outside of the jacket layer, and a discharging port communicated with the bottom of the tank body and penetrating to the outside of the jacket layer, the upper end of the tank body is provided with a stirring motor, the output end of the stirring motor is provided with a stirring rod located in the tank body, and a pair of telescopic rods are arranged between the jacket layer and the tank body; the reaction kettle for polyurethane fender production realizes the up-down movement of the circular ring seat by utilizing air charging and discharging, makes the material pass through the defoaming hole, and utilizes the defoaming needle in the defoaming hole to puncture and defoam the bubbles in the material, so that the bubbles generated in the reaction can be effectively defoamed.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane fender production technology, specifically to a reaction vessel for polyurethane fender production. Background Technology

[0002] Polyurethane fenders are a common material used for the protection of ships and docks. They can be installed on the sides or stern of ships to absorb the impact force between the ship and the dock or other vessels, reducing damage to the hull and dock from collisions. Polyurethane fenders can also be installed on the edges of docks to protect the dock structure from damage caused by ship collisions or impacts, mitigating the impact of impact forces on the dock. Polyurethane fenders can be used to protect berths, providing a safe berthing environment for ships and reducing collision damage between berths and ships. Polyurethane fenders can also be used as floating fenders for the protection and marking of water facilities such as cofferdams and navigation markers, improving the safety of waterways.

[0003] The polyurethane fender reactor is the core equipment used to produce polyurethane fenders. By precisely controlling the mixing of raw materials, reaction temperature, pressure, and stirring conditions, it achieves efficient synthesis of polyurethane resin. Its performance directly affects the key characteristics of the fender, such as energy absorption and corrosion resistance. During the mixing reaction, after the reaction is completed, the mixture needs to be defoamed. Defoaming is achieved by stirring with a stirring rod. However, small bubbles cannot be broken during defoaming, resulting in poor defoaming effect and affecting the quality of the material. Therefore, we propose a reactor for polyurethane fender production to solve this technical defect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a reaction vessel for the production of polyurethane fenders.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reaction vessel for producing polyurethane fenders, comprising a tank body, a jacket layer disposed outside the tank body, a manhole and feed inlet connected to the upper end of the tank body, a steam inlet and a cooling water outlet connected to the upper outside of the jacket layer, a cooling water inlet and a condensate outlet connected to the lower outside of the jacket layer, and a discharge port connected to the bottom of the tank body and extending to the outside of the jacket layer. A stirring motor is provided at the upper end of the tank body, and a stirring rod located inside the tank body is provided at the output end of the stirring motor. A pair of telescopic rods are provided between the jacket layer and the tank body, passing through the jacket layer and the tank body. One end of the telescopic rod is connected to the jacket layer, and a circular seat that fits against the inner wall of the tank body is provided between the other ends of the telescopic rods. The circular seat is located outside the stirring rod, and an air inlet assembly is provided on the telescopic rod.

[0006] The ring seat has multiple defoaming holes distributed at equal intervals, and multiple defoaming needles are installed inside the defoaming holes. A pair of straight rods are installed on the upper outer side of the stirring rod, and multiple defoaming rods are installed vertically on the straight rods. Multiple defoaming needles are installed on the outer side of the defoaming rods.

[0007] Using the above technical solution, when the mixture inside the tank is heated and reacted, the stirring motor drives the stirring rod to rotate, which improves the reaction efficiency. At the same time, the bubbles generated by the reaction rise to the top of the material. With the rotation of the stirring rod, the straight rod, the defoaming rod and the second defoaming needle rotate synchronously, ensuring that the second defoaming needle is evenly distributed during rotation to puncture and break the surface bubbles.

[0008] Furthermore, during the reaction process, air is introduced into the telescopic rod through the air intake assembly, causing the telescopic rod to extend and push the annular seat upward within the material. By venting the air, the annular seat moves downward under the gravity of its own weight, and the telescopic rod retracts. This process of air intake and exhaust allows the annular seat to move up and down, enabling the material to pass through the defoaming holes. The defoaming needles inside the defoaming holes then puncture and defoam the air bubbles in the material, effectively defoaming the bubbles generated during the reaction.

[0009] As a preferred embodiment of this utility model, the telescopic rod consists of a sealing outer cylinder and a sealing inner rod. The sealing outer cylinder passes through the tank body and the jacket layer, and the sealing inner rod, which is connected to the annular seat, is slidably sealed inside the sealing outer cylinder.

[0010] By adopting the above technical solution, the sealing outer cylinder and the sealing inner rod are sealed and slidingly fitted to achieve the telescopic function of the telescopic rod.

[0011] As a preferred embodiment of this utility model, the defoaming holes are circular, and the defoaming needles are distributed in a ring at equal intervals within the defoaming holes.

[0012] By adopting the above technical solution, it is ensured that the defoaming needle effectively defoams the material flowing through the defoaming hole.

[0013] As a preferred embodiment of this utility model, the two defoaming needles are evenly arranged and distributed on the outside of the defoaming rod.

[0014] By adopting the above technical solution, it is ensured that the defoaming needles on the defoaming rod effectively defoam the foam on the reaction surface.

[0015] In a preferred embodiment of this invention, when the telescopic rod is in the extended state, the annular seat is in contact with the defoaming rod.

[0016] As a preferred embodiment of this utility model, the air intake assembly includes an air pump and a connecting pipe connected to the lower end of the sealed outer cylinder, and an air pipe is connected between the air pump's air inlet and the connecting pipe.

[0017] As a preferred embodiment of this utility model, the air pipe is externally connected to an automatic exhaust valve.

[0018] Using the above technical solution, the air pump works to inflate the cylinder. By utilizing the interconnection between the air pump, air pipe, connecting pipe and sealing outer cylinder, gas enters the sealing outer cylinder. Under the action of air pressure, the sealing inner rod moves, realizing the extension of the telescopic rod. The automatic exhaust valve opens to exhaust gas. Under the action of gravity of the ring seat, the sealing inner rod can be pressed down to realize the retraction of the telescopic rod.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0020] The reaction vessel for producing polyurethane fenders heats and reacts the mixture inside the tank. The stirring motor drives the stirring rod to rotate, which improves the reaction efficiency. At the same time, the bubbles generated by the reaction rise to the top of the material. In conjunction with the rotation of the stirring rod, the straight rod, the defoaming rod and the second defoaming needle rotate synchronously, ensuring that the defoaming needles are evenly distributed during rotation to puncture and break the surface bubbles.

[0021] Furthermore, during the reaction process, air is introduced into the telescopic rod through the air intake assembly, causing the telescopic rod to extend and push the annular seat upward within the material. By venting the air, the annular seat moves downward under the gravity of its own weight, and the telescopic rod retracts. This process of air intake and exhaust allows the annular seat to move up and down, enabling the material to pass through the defoaming holes. The defoaming needles inside the defoaming holes then puncture and defoam the air bubbles in the material, effectively defoaming the bubbles generated during the reaction. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present utility model;

[0023] Figure 2 This is a cross-sectional perspective view of the present invention;

[0024] Figure 3 This is a three-dimensional view of the internal structure of this utility model;

[0025] Figure 4 This is an enlarged view of section A of this utility model;

[0026] Figure 5 This is a rear view of the present invention.

[0027] In the diagram: 1. Tank body; 2. Jacket layer; 3. Manhole; 4. Feed inlet; 5. Steam inlet; 6. Cooling water outlet; 7. Discharge outlet; 8. Cooling water inlet; 9. Condensate outlet; 10. Stirring motor; 11. Stirring rod; 12. Telescopic rod; 13. Circular seat; 14. Air pump; 15. Connecting pipe; 16. Air pipe; 17. Defoaming hole; 18. Defoaming needle one; 19. Defoaming rod; 20. Defoaming needle two; 21. Straight rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 5 The polyurethane fender production reactor in this embodiment mainly consists of a tank body 1, a jacket layer 2, a manhole 3, a feed inlet 4, a steam inlet 5, a cooling water outlet 6, a discharge outlet 7, a cooling water inlet 8, a condensate outlet 9, a stirring motor 10, a stirring rod 11, a telescopic rod 12, a ring seat 13, an air pump 14, a connecting pipe 15, a gas pipe 16, a defoaming hole 17, a defoaming needle 18, a defoaming rod 19, a defoaming needle 20, and a straight rod 21.

[0030] Tank 1 is the main container of the entire reactor, used to hold the mixture required for the production of polyurethane fenders. The jacket layer 2 is integrally fixed to the outside of tank 1, forming a jacket structure around tank 1, which is used to introduce steam or cooling water to achieve precise control of the temperature inside tank 1.

[0031] Manhole 3 and feed inlet 4 are both connected to the upper end of tank 1 and are symmetrically distributed on the left and right. Manhole 3 is used for workers to enter the inside of tank 1 for maintenance, cleaning and other operations, while feed inlet 4 is used to add the raw materials required for the production of polyurethane fenders into tank 1.

[0032] Steam inlet 5 and cooling water outlet 6 are symmetrically distributed on the left and right sides of the upper outer side of the jacket layer 2. Steam inlet 5 is used to introduce steam into the jacket layer 2 to provide heat for the reaction in the tank 1. Cooling water outlet 6 is used to discharge the cooling water that has been heated in the jacket layer 2. Cooling water inlet 8 and condensate outlet 9 are symmetrically distributed on the left and right sides of the lower outer side of the jacket layer 2. Cooling water inlet 8 is used to introduce cooling water into the jacket layer 2 to cool the tank 1. Condensate outlet 9 is used to discharge the condensate formed after the steam in the jacket layer 2 is cooled. Discharge port 7 is connected to the bottom of the tank 1 and extends to the outside of the jacket layer 2. It is used to discharge the polyurethane fender product generated after the reaction is completed from the tank 1. The surface of discharge port 7 is connected to a switch control valve.

[0033] The stirring motor 10 is fixed at the center of the upper surface of the tank 1, and its output end is connected to the stirring rod 11 located inside the tank 1. When the stirring motor 10 is working, it can drive the stirring rod 11 to rotate, stir the mixture in the tank 1, and improve the reaction efficiency.

[0034] A pair of telescopic rods 12 are fixed between the jacket layer 2 and the tank body 1. The telescopic rods 12 pass through the jacket layer 2 and the tank body 1. Specifically, the telescopic rods 12 are composed of a sealing outer cylinder and a sealing inner rod. The sealing outer cylinder passes through the tank body 1 and the jacket layer 2. The sealing inner rod, which is connected to the annular seat 13, is slidably sealed inside the sealing outer cylinder. This sealing sliding fit structure design enables the telescopic rods 12 to achieve the telescopic function.

[0035] One end of the telescopic rod 12 is connected and fixed to the jacket layer 2, and the other end is fixed with a circular seat 13 that fits against the inner wall of the tank 1. The circular seat 13 is located outside the stirring rod 11. This position setting allows the circular seat 13 to move up and down inside the tank 1 as the telescopic rod 12 extends and retracts, and it always stays in contact with the inner wall of the tank 1 during the movement, ensuring that the material can pass smoothly through the defoaming holes 17 on the circular seat 13.

[0036] The annular seat 13 has multiple equally spaced defoaming holes 17. The defoaming holes 17 are circular, and the defoaming needles 18 are distributed in a ring at equal intervals within the defoaming holes 17. This design ensures that the defoaming needles 18 can perform comprehensive and effective puncture and defoaming treatment on the air bubbles in the material passing through the defoaming holes 17.

[0037] A pair of straight rods 21 are fixed to the upper end of the stirring rod 11. Multiple defoaming rods 19 are fixed vertically downward on the straight rods 21 at equal intervals. Multiple defoaming needles 20 are evenly arranged and fixed on the outside of the defoaming rods 19. When the stirring motor 10 drives the stirring rod 11 to rotate, it will synchronously drive the straight rods 21, defoaming rods 19 and defoaming needles 20 to rotate. The defoaming needles 20 can puncture and break the bubbles floating on the reaction surface.

[0038] During the reaction, air is injected into the telescopic rod 12 through the air intake assembly, causing the telescopic rod 12 to extend and push the annular seat 13 upward within the material. Specifically, the air intake assembly includes an air pump 14 and a connecting pipe 15 connected to the lower end of the sealed outer cylinder. An air pipe 16 connects the air inlet of the air pump 14 to the connecting pipe 15, and an automatic exhaust valve is also connected to the outside of the air pipe 16. When the air pump 14 is working, gas enters the sealed outer cylinder sequentially through the air pipe 16 and the connecting pipe 15. Under the action of air pressure, the sealed inner rod moves, thereby extending the telescopic rod 12. When the telescopic rod 12 needs to retract, the automatic exhaust valve is opened to exhaust gas. Under the action of gravity of the annular seat 13, the sealed inner rod moves downward, and the telescopic rod 12 retracts. Through this air intake and exhaust operation, the annular seat 13 moves up and down, allowing the material to pass through the defoaming hole 17. The defoaming needle 18 in the defoaming hole 17 punctures and defoams the air bubbles in the material, thereby effectively defoaming the air bubbles generated by the reaction.

[0039] When the telescopic rod 12 is in the extended state, the ring seat 13 contacts the defoaming rod 19. This design can ensure the stability of the structure to a certain extent, and also facilitates the cleaning and maintenance of the defoaming rod 19 and the ring seat 13.

[0040] The tank body 1 and the jacket layer 2 can be made of stainless steel. Stainless steel has good corrosion resistance and strength, and can withstand the high temperature, high pressure and chemical corrosion during the reaction process, ensuring the service life and safety of the reactor.

[0041] Stirring rod 11, straight rod 21, defoaming rod 19 and other stirring and defoaming components can also be made of stainless steel to ensure that they do not undergo chemical reactions when in contact with the mixture, while ensuring their strength and durability.

[0042] The outer sealing cylinder and inner sealing rod of the telescopic rod 12 can be made of high-strength alloy steel. This material has high strength and wear resistance, and can withstand the friction and pressure during the telescopic process, ensuring the normal operation of the telescopic rod 12.

[0043] The annular seat 13 can be made of a material that is compatible with the inner wall of the tank 1 to ensure its fit with the inner wall of the tank 1 and prevent material leakage. Meanwhile, the defoaming holes 17 and defoaming needles 18 and 20 on the annular seat 13 can be made of corrosion-resistant plastic or metal materials, and the specific choice can be made according to actual production needs and costs.

[0044] In summary, this polyurethane fender production reactor, through its reasonable structural design, defoaming principle, and system control, can effectively improve the production quality and efficiency of polyurethane fenders, while ensuring the safe and stable operation of the reactor.

[0045] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional and known device such as a computer, and the existing publicly available power connection technology will not be elaborated in the text.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reaction vessel for producing polyurethane fenders, comprising a tank body, a jacket layer disposed outside the tank body, a manhole and a feed inlet connected to the upper end of the tank body, a steam inlet and a cooling water outlet connected to the upper outer side of the jacket layer, a cooling water inlet and a condensate outlet connected to the lower outer side of the jacket layer, and a discharge outlet connected to the bottom of the tank body and extending to the outside of the jacket layer, characterized in that, The upper end of the tank is equipped with a stirring motor, and the output end of the stirring motor is equipped with a stirring rod located inside the tank. A pair of telescopic rods are provided between the jacket layer and the tank. The telescopic rods pass through the jacket layer and the tank. One end of the telescopic rod is connected to the jacket layer. The other end of the telescopic rod is provided with an annular seat that fits against the inner wall of the tank. The annular seat is located outside the stirring rod. An air intake assembly is provided on the telescopic rod. The ring seat has multiple defoaming holes distributed at equal intervals, and multiple defoaming needles are installed inside the defoaming holes. A pair of straight rods are installed on the upper outer side of the stirring rod, and multiple defoaming rods are installed vertically on the straight rods. Multiple defoaming needles are installed on the outer side of the defoaming rods.

2. The reaction vessel for producing polyurethane fenders according to claim 1, characterized in that: The telescopic rod consists of a sealing outer cylinder and a sealing inner rod. The sealing outer cylinder passes through the tank body and the jacket layer, and the sealing inner rod, which is connected to the annular seat, slides and seals inside the sealing outer cylinder.

3. The reaction vessel for producing polyurethane fenders according to claim 1, characterized in that: The defoaming holes are circular, and the defoaming needles are distributed in a ring at equal intervals within the defoaming holes.

4. The reaction vessel for producing polyurethane fenders according to claim 1, characterized in that: The two defoaming needles are evenly arranged on the outside of the defoaming rod.

5. The reaction vessel for producing polyurethane fenders according to claim 1, characterized in that: When the telescopic rod is in the extended state, the annular seat is in contact with the defoaming rod.

6. The reaction vessel for producing polyurethane fenders according to claim 2, characterized in that: The air intake assembly includes an air pump and a connecting pipe that connects to the lower end of the sealed outer cylinder. An air pipe connects the air pump's air inlet to the connecting pipe.

7. The reaction vessel for producing polyurethane fenders according to claim 6, characterized in that: The external connection of the trachea is an automatic exhaust valve.

Images