A kind of polyurethane adhesive production is with drop tank

Abstract

The utility model relates to polyurethane adhesive production equipment technical field, concretely relates to a kind of drop tank for polyurethane adhesive production, to solve the problem that the upper raw material is not fully dissolved and the lower raw material is prone to side reaction due to the single jacket of existing drop tank cannot be differentiated temperature control. It includes tank body, tank body is equipped with feed inlet, discharge port and heating jacket;The heating jacket is divided into multiple heating cavities from top to bottom, the temperature of hot oil increases, and spiral guide vane is arranged in the cavity;The hollow spiral stirring body is arranged in the center of the tank, and the end pipe shaft is connected with the rotary joint;The tank body top is partially covered with end cover. Through differentiated temperature control and double heating stirring, the raw material dissolution efficiency and uniformity are improved, the drop stability is ensured, the adhesive product batch consistency is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of polyurethane adhesive production equipment, specifically to a dripping tank for polyurethane adhesive production. Background Technology

[0002] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model, and is not necessarily to be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Polyurethane adhesives are widely used in construction, automotive, electronics, and packaging industries due to their high bonding strength, excellent weather resistance, and wide applicability to various substrates. In the production process of polyurethane adhesives, the dispensing tank is one of the core pieces of equipment, mainly used for the pretreatment, precise dispensing, and premixing of raw materials. Its operational stability directly determines the reactivity and mixing uniformity of the raw materials, thus affecting the mechanical properties and batch consistency of the final adhesive product.

[0004] Existing dripping tanks mostly employ a single-chamber structure, using only hot oil at a single temperature for overall heating. However, in polyurethane adhesive production, the temperature requirements of raw materials in different areas of the tank vary significantly. Specifically, the upper part of the tank requires a lower temperature for pre-dissolving the raw materials to prevent premature reaction due to high temperatures; the lower part requires a higher temperature to maintain the fluidity of the raw materials and ensure smooth dripping. Existing dripping tanks cannot achieve differentiated temperature control, which easily leads to slow and incomplete dissolution of raw materials in the upper part, while localized side reactions occur in the lower part due to overheating, compromising the stability of the raw materials and creating potential quality problems for subsequent polymerization reactions.

[0005] Therefore, the urgent need to design a dropping tank that can achieve precise temperature control in different areas inside the tank, reduce energy consumption, and improve batch consistency of products has become a key technical problem that the industry needs to solve. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model proposes a dripping tank for the production of polyurethane adhesives.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A dripping tank for producing polyurethane adhesive includes a tank body, the tank body being provided with an inlet and an outlet, and the tank body also being provided with a heating jacket; The heating jacket is provided with multiple heating chambers from top to bottom. Each heating chamber is filled with hot oil at a corresponding temperature. The temperature of the hot oil flowing into the heating chamber increases sequentially from top to bottom. The heating temperature in the top heating chamber is 50~60℃, and the heating temperature in the bottom heating chamber is 80~100℃.

[0008] Preferably, the temperature of the hot oil flowing into the intermediate heating chamber between the top heating chamber and the bottom heating chamber is 60~80℃.

[0009] Preferably, a hollow spiral agitator is rotatably mounted at the center of the tank, and a spiral heating channel is provided inside the spiral agitator.

[0010] Preferably, the spiral mixer is provided with end tube shafts at both ends, and the end tube shafts are connected to corresponding rotary joints.

[0011] Preferably, the top of the tank is provided with a split end cap, which can be detachably and sealed on the top of the tank.

[0012] Preferably, the heating jacket is provided with three heating chambers from top to bottom: an upper heating chamber, a middle heating chamber, and a lower heating chamber. The upper heating chamber is provided with an upper liquid inlet pipe and an upper liquid outlet pipe, the middle heating chamber is provided with a middle liquid inlet pipe and a middle liquid outlet pipe, and the lower heating chamber is provided with a lower liquid inlet pipe and a lower liquid outlet pipe.

[0013] Preferably, each heating chamber is provided with a corresponding spiral guide plate.

[0014] This utility model has at least the following beneficial effects: This invention addresses the limitation of existing single-jacket heating systems, which cannot meet the temperature requirements of different areas within the tank by dividing the heating jacket into multiple independent heating chambers from top to bottom and ensuring that the temperature of the hot oil flowing into each chamber increases progressively. The top heating chamber provides a mild pre-dissolution environment for the raw materials in the upper part of the tank, preventing premature polymerization caused by high temperatures while ensuring slow and complete dissolution. The bottom heating chamber effectively maintains the fluidity of the raw materials in the lower part of the tank, preventing poor dripping due to low-temperature viscosity. The transition temperature of the middle heating chamber further avoids fluctuations in raw material properties caused by excessive temperature differences between the upper and lower regions. This differentiated temperature control design avoids the problems of insufficient dissolution in the upper part and side reactions in the lower part from the source, significantly improving the stability of the raw material pretreatment stage and laying a good foundation for subsequent polymerization reactions.

[0015] This invention features a hollow spiral agitator mounted at the center of the tank, serving a dual function of mixing and auxiliary heating. On one hand, the spiral structure, when rotating, drives the raw materials within the tank to circulate vertically, breaking down regional stratification and preventing uneven dissolution caused by localized stagnation. On the other hand, the spiral heating channel within the agitator allows for the introduction of a heating medium, creating a dual heating mode combining external jacket heating and internal agitator heating. This ensures the raw materials are heated simultaneously from both the inside and outside, significantly reducing localized temperature differences. Compared to traditional equipment relying solely on external jacket heating, this design not only greatly increases the dissolution rate of the upper raw materials but also ensures uniform heating during mixing, further reducing side reactions caused by localized overheating. Simultaneously, it improves the premixing uniformity of the raw materials, providing a guarantee for precise control during the subsequent dripping stage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0017] The attached figures are labeled as follows: 100. Tank body; 110. Split end cap; 120. Feed inlet; 130. Discharge outlet; 200. Heating chamber; 300. Baffle plate; 400. Spiral guide plate; 500. Upper liquid inlet pipe; 510. Upper liquid outlet pipe; 600. Middle liquid inlet pipe; 610. Middle liquid outlet pipe; 700. Lower liquid inlet pipe; 710. Lower liquid outlet pipe; 800. End pipe shaft; 810. Spiral agitator; 820. Rotary joint. Detailed Implementation

[0018] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figures 1 to 2 A dripping tank for polyurethane adhesive production is disclosed, comprising a tank body 100, wherein the tank body 100 is provided with an inlet 120 and an outlet 130, and the tank body 100 is also provided with a heating jacket; the heating jacket is provided with a plurality of heating chambers 200 arranged sequentially from top to bottom, the heating chambers 200 being separated by partitions 300. In this embodiment, there are three heating chambers 200, namely an upper heating chamber 200, a middle heating chamber 200, and a lower heating chamber 200. The upper heating chamber 200 is provided with an upper liquid inlet pipe 500 and an upper liquid outlet pipe 510, the middle heating chamber 200 is provided with a middle liquid inlet pipe 600 and a middle liquid outlet pipe 610, and the lower heating chamber 200 is provided with a lower liquid inlet pipe 700 and a lower liquid outlet pipe 710.

[0020] Each heating chamber 200 is filled with hot oil at a corresponding temperature, and the temperature of the hot oil in each heating chamber 200 increases sequentially from top to bottom. The heating temperature in the top heating chamber 200 is 50~60℃, the heating temperature in the bottom heating chamber 200 is 80~100℃, and the temperature of the hot oil in the intermediate heating chamber 200 between the top and bottom heating chambers is 60~80℃. The top heating chamber 200 provides a mild pre-dissolving environment for the upper raw materials to prevent premature polymerization caused by high temperature. The bottom heating chamber 200 maintains the fluidity of the lower raw materials to prevent low-temperature viscosity from clogging the outlet 130. The intermediate heating chamber 200 serves as a transition to avoid fluctuations in the properties of the raw materials caused by excessive temperature differences between the top and bottom.

[0021] Each heating chamber 200 is equipped with a corresponding spiral guide plate 400. The spiral guide plate 400 in each heating chamber 200 can guide the hot oil to flow along the spiral path, avoid local stagnation or rapid flow of hot oil, prolong the contact time between hot oil and tank wall, ensure that the temperature of each heating chamber 200 is uniform and stable, and improve the temperature control accuracy.

[0022] In addition, a hollow spiral agitator 810 is rotatably installed at the center of the tank 100. This agitator can be driven by a motor. The spiral agitator 810 has a spiral heating channel inside, forming a dual heating system with the external heating jacket, ensuring that the raw material is heated simultaneously from both inside and out. The spiral agitator 810 has end tube shafts 800 at both ends, which are connected to corresponding rotary joints 820 to ensure that the heating medium does not leak during rotation, guaranteeing safe operation of the equipment.

[0023] The tank body 100 is equipped with a split end cap 110 on the top, which is detachably and sealingly installed on the top of the tank body 100. Specifically, it is detachably and sealingly installed on the top of the tank body 100 by bolts. Its core functions are to facilitate operation and maintenance and to seal and prevent dust. The end cap can be removed by removing the bolts without lifting the whole tank, which facilitates the cleaning or maintenance of the spiral agitator 810 and the partition 300 of the heating chamber 200 inside the tank, greatly shortening the operation and maintenance time. At the same time, the oil-resistant sealing ring on the edge of the end cap can ensure the airtightness of the tank and prevent the outside air and dust from entering and contaminating the raw materials, thus ensuring the purity of the raw materials.

[0024] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, if present, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dripping tank for producing polyurethane adhesives, comprising a tank body, wherein the tank body is provided with an inlet and an outlet, and the tank body is further provided with a heating jacket; characterized in that: The heating jacket is provided with multiple heating chambers from top to bottom. Each heating chamber is filled with hot oil at a corresponding temperature. The temperature of the hot oil flowing into the heating chamber increases sequentially from top to bottom. The heating temperature in the top heating chamber is 50~60℃, and the heating temperature in the bottom heating chamber is 80~100℃.

2. The dripping tank for polyurethane adhesive production as described in claim 1, characterized in that: The temperature of the hot oil flowing into the intermediate heating chamber between the top heating chamber and the bottom heating chamber is 60~80℃.

3. The dripping tank for polyurethane adhesive production as described in claim 1, characterized in that: A hollow spiral agitator is rotatably mounted at the center of the tank, and a spiral heating channel is provided inside the spiral agitator.

4. The dripping tank for polyurethane adhesive production as described in claim 3, characterized in that: The spiral mixer is provided with end tube shafts at both ends, and the end tube shafts are connected to corresponding rotary joints.

5. The dripping tank for polyurethane adhesive production as described in claim 1, characterized in that: The top of the tank is equipped with a split end cap, which can be detachably and sealed on the top of the tank.

6. The dripping tank for polyurethane adhesive production as described in claim 1, characterized in that: The heating jacket has three heating chambers arranged from top to bottom: an upper heating chamber, a middle heating chamber, and a lower heating chamber. The upper heating chamber is equipped with an upper inlet pipe and an upper outlet pipe, the middle heating chamber is equipped with a middle inlet pipe and a middle outlet pipe, and the lower heating chamber is equipped with a lower inlet pipe and a lower outlet pipe.

7. The dripping tank for producing polyurethane adhesives as described in any one of claims 1 to 6, characterized in that: Each heating chamber is equipped with a corresponding spiral guide plate.

Images