Production pressure reflux adjusting device based on unsaturated polyester resin reaction kettle

Abstract

The utility model relates to a production pressure reflux adjusting device based on an unsaturated polyester resin reaction kettle, which belongs to the technical field of unsaturated polyester resin production and comprises a reaction kettle, a gas-liquid separation tank and a liquid buffer filtering tank, and reflux pipes are fixedly mounted on opposite sides of the reaction kettle and the gas-liquid separation tank. According to the production pressure backflow adjusting device based on the unsaturated polyester resin reaction kettle, the backflow control valve is arranged between the backflow pipes between the gas-liquid separation tank and the stirring reaction kettle, and when the air pressure on one side is large, the sliding plug is driven to move in the communicating channel, so that the upper backflow channel is communicated with the lower backflow channel; the internal pressure is automatically adjusted and controlled, so that the problems that the control valve needs to be opened or closed manually or electrically according to the air pressure between the gas-liquid separation tank and the stirring reaction kettle, workers need to observe at any time or an electric control device is used for controlling, and the working efficiency is low are solved. And the pressure backflow adjustment is troublesome.

Description

Technical Field

[0001] The utility model relates to the technical field of unsaturated resin production, in particular to a production pressure reflux regulating device based on an unsaturated resin reactor. Background Technique

[0002] Unsaturated resin is a high molecular compound containing unsaturated double bonds formed by the polycondensation reaction of dibasic acid and diol. Unsaturated resin is formed by the polycondensation reaction of dibasic acid and diol to form a high molecular compound containing unsaturated double bonds. Unsaturated resin belongs to thermosetting resin and can be cured into an insoluble and infusible network polymer by heating or under the action of an initiator. The mechanical strength of the resin after single curing is relatively low, but when reinforced with glass fiber, it can be made into a composite material with excellent mechanical strength, namely "fiberglass". Unsaturated resin has good corrosion resistance and can resist acids, alkalis, salts and most organic solvents at general concentrations.

[0003] The unsaturated resin production system generally includes a reactor, a heat exchange system, a stirring system, a solid feeding system, a temperature measurement system, a pressure measurement system, a liquid feeding system, an explosion-proof system, a fractionation system, a buffer system and a collection system, etc. The liquid phase collection tank is a subsequent process equipment after fractionation, generally including a feed pipe and a discharge pipe. A reflux pipeline is arranged between the gas-liquid separation tank and the stirring reactor, and is controlled by a reflux pipe control valve to adjust the air pressure of the liquid phase collection tank body, prevent excessive pressure or relieve negative pressure, facilitate the adjustment and control of the internal pressure, and thus improve work efficiency and reduce production costs.

[0004] However, for the common production pressure reflux regulating device based on an unsaturated resin reactor, the opening and closing of the reflux pipeline are controlled by a reflux pipe control valve. The opening and closing of this control valve need to be manually or electrically opened according to the air pressure between the gas-liquid separation tank and the stirring reactor, and it is necessary for staff to observe at all times or use an electric control device for control, resulting in relatively troublesome pressure reflux regulation. In view of this, this application proposes a production pressure reflux regulating device based on an unsaturated resin reactor. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a production pressure reflux regulating device based on an unsaturated resin reactor, which has the advantages of controlling the opening and closing of the valve through the air pressure difference between the gas-liquid separation tank and the stirring reactor, etc., and solves the problem that the opening and closing of the control valve need to be manually or electrically opened according to the air pressure between the gas-liquid separation tank and the stirring reactor, and it is necessary for staff to observe at all times or use an electric control device for control, resulting in relatively troublesome pressure reflux regulation.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A production pressure reflux regulating device based on an unsaturated resin reaction kettle, including a reaction kettle, a gas-liquid separation tank, and a liquid buffer filtration tank. An observation window is fixedly installed on the surface of the reaction kettle. One side of the reaction kettle and the gas-liquid separation tank are both fixedly installed with reflux pipes. A reflux control valve is flange-mounted between the two reflux pipes through a connecting flange;

[0007] The reflux control valve includes a valve body flange-mounted between the two reflux pipes. A communication channel is opened inside the valve body. Pressure-receiving cavities are opened at both ends of the valve body. An upper reflux channel is opened on one side of the valve body, and a lower reflux channel is opened on the other side of the valve body. A sliding plug is slidably installed inside the communication channel, and a pressure-receiving plate is slidably installed inside the pressure-receiving cavity. A control spring is fixedly installed between the pressure-receiving plate and the sliding plug.

[0008] Furthermore, both the upper reflux channel and the lower reflux channel are communicated with the communication channel, and a sealing ring is fixedly installed on the surface of the pressure-receiving plate.

[0009] Furthermore, a condenser pipe is fixedly installed on the top of the reaction kettle, and one end of the condenser pipe is communicated with the gas-liquid separation tank.

[0010] Furthermore, a horizontal condenser is fixedly installed on the surface of the condenser pipe, and a vertical condenser is fixedly installed on the surface of the condenser pipe.

[0011] Furthermore, a stirring shaft is rotatably installed on the inner top wall of the reaction kettle, and stirring blades are fixedly installed on the surface of the stirring shaft.

[0012] Furthermore, a stirring motor is fixedly installed on the top of the reaction kettle, and the output shaft of the stirring motor is fixedly connected to the top end of the stirring shaft.

[0013] Furthermore, a discharge pipe is fixedly installed at the bottom of the reaction kettle, and legs are fixedly installed at the bottoms of the reaction kettle, the gas-liquid separation tank, and the liquid buffer filtration tank.

[0014] Furthermore, a gas control valve is fixedly installed on the top of the gas-liquid separation tank, and a liquid control valve is fixedly installed on the surface of the connecting pipe between the gas-liquid separation tank and the liquid buffer filtration tank.

[0015] Compared with the prior art, the present utility model provides a production pressure reflux regulating device based on an unsaturated resin reaction kettle, which has the following beneficial effects:

[0016] The production pressure reflux regulating device based on an unsaturated resin reactor sets a reflux control valve between the reflux pipes between the gas-liquid separation tank and the stirring reactor. The pressure-receiving plate moves in the pressure-receiving cavity under the action of the internal air pressures of the gas-liquid separation tank and the stirring reactor, driving the control spring to contract and move. When the air pressure on one side is relatively large, it drives the sliding plug to move in the communication channel, enabling the upper reflux channel and the lower reflux channel to communicate, preventing excessive pressure or relieving negative pressure, and automatically regulating and controlling the internal pressure, thus solving the problem that the opening and closing of the control valve need to be manually or electrically opened according to the air pressure between the gas-liquid separation tank and the stirring reactor, requiring staff to observe at all times or use an electric control device for control, resulting in relatively troublesome pressure reflux regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a front view of the reactor of the present utility model;

[0019] Figure 3 is a sectional view of the reflux control valve of the present utility model;

[0020] Figure 4 is a three-dimensional sectional view of the reflux control valve of the present utility model.

[0021] In the figures: 1. Reactor; 101. Observation window; 2. Gas-liquid separation tank; 3. Reflux pipe; 4. Reflux control valve; 41. Valve body; 42. Communication channel; 43. Pressure-receiving cavity; 44. Upper reflux channel; 45. Lower reflux channel; 46. Sliding plug; 47. Pressure-receiving plate; 48. Control spring; 5. Connecting flange; 6. Condensing pipe; 7. Horizontal condenser; 8. Vertical condenser; 9. Stirring shaft; 10. Stirring paddle; 11. Stirring motor; 12. Discharge pipe; 13. Leg; 14. Liquid buffer and filter tank; 15. Gas control valve; 16. Liquid control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1: Please refer to Figures 1 to 4, A production pressure reflux regulating device based on an unsaturated resin reactor, including a reactor 1, a gas-liquid separation tank 2, and a liquid buffer filtration tank 14. An observation window 101 is fixedly installed on the surface of the reactor 1. On opposite sides of the reactor 1 and the gas-liquid separation tank 2, reflux pipes 3 are fixedly installed. A reflux control valve 4 is flange-mounted between the two reflux pipes 3 through a connecting flange 5.

[0024] Among them, the reflux control valve 4 includes a valve body 41 flange-mounted between the two reflux pipes 3. A communication channel 42 is opened inside the valve body 41. Pressure chambers 43 are opened at both ends of the valve body 41. An upper reflux channel 44 is opened on one side of the valve body 41, and a lower reflux channel 45 is opened on the other side of the valve body 41. A sliding plug 46 is slidably installed inside the communication channel 42, and a pressure receiving plate 47 is slidably installed inside the pressure chamber 43. A control spring 48 is fixedly installed between the pressure receiving plate 47 and the sliding plug 46.

[0025] Secondly, both the upper reflux channel 44 and the lower reflux channel 45 are connected to the communication channel 42. A sealing ring is fixedly installed on the surface of the pressure receiving plate 47. When the pressure difference at both ends of the valve body 41 is large, the pressure receiving plate 47 drives the control spring 48 to move, driving the sliding plug 46 to move to one side, and the upper reflux channel 44 and the lower reflux channel 45 are connected to adjust the pressure between the reactor 1 and the gas-liquid separation tank 2.

[0026] At the same time, a condenser tube 6 is fixedly installed on the top of the reactor 1. One end of the condenser tube 6 is connected to the gas-liquid separation tank 2.

[0027] Among them, a horizontal condenser 7 is fixedly installed on the surface of the condenser tube 6, and a vertical condenser 8 is fixedly installed on the surface of the condenser tube 6.

[0028] At the same time, a discharge pipe 12 is fixedly installed at the bottom of the reactor 1. Legs 13 are fixedly installed at the bottoms of the reactor 1, the gas-liquid separation tank 2, and the liquid buffer filtration tank 14.

[0029] Among them, a gas control valve 15 is fixedly installed on the top of the gas-liquid separation tank 2, and a liquid control valve 16 is fixedly installed on the surface of the connecting pipe between the gas-liquid separation tank 2 and the liquid buffer filtration tank 14.

[0030] Example 2: On the basis of Example 1, a stirring shaft 9 is rotatably installed on the inner top wall of the reactor 1, and stirring blades 10 are fixedly installed on the surface of the stirring shaft 9.

[0031] Among them, a stirring motor 11 is fixedly installed on the top of the reactor 1, and the output shaft of the stirring motor 11 is fixedly connected to the top end of the stirring shaft 9. The stirring motor 11 drives the stirring shaft 9 to rotate, drives the stirring blades 10 to rotate, and stirs the materials in the reactor 1 to accelerate the material reaction.

[0032] When this embodiment is in use, a reflux control valve 4 is arranged between the reaction kettle 1 and the gas-liquid separation tank 2. The pressure receiving plate 47, the control spring 48 and the sliding plug 46 in the reflux control valve 4 are affected by the pressure difference between the reaction kettle 1 and the gas-liquid separation tank 2. When the pressure difference is too large, the sliding plug 46 generates displacement, so that the upper reflux channel 44 and the lower reflux channel 45 are communicated, automatically adjusting the internal pressure of the equipment. By replacing the control springs 48 with different elastic coefficients, the pressure difference causing the sliding plug 46 to generate displacement can be adjusted.

[0033] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer for control, and the existing publicly disclosed power connection technology will not be elaborated in the text.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production pressure reflux regulating device based on an unsaturated resin reaction kettle, comprising a reaction kettle (1), a gas-liquid separation tank (2) and a liquid buffer and filtration tank (14), characterized in that: An observation window (101) is fixedly installed on the surface of the reaction kettle (1). On the opposite sides of the reaction kettle (1) and the gas-liquid separation tank (2), a reflux pipe (3) is fixedly installed. A reflux control valve (4) is flange-mounted between the two reflux pipes (3) through a connecting flange (5). The reflux control valve (4) includes a valve body (41) flange-mounted between the two reflux pipes (3). A communication channel (42) is provided inside the valve body (41). Pressure chambers (43) are provided at both ends of the valve body (41). An upper reflux channel (44) is provided on one side of the valve body (41), and a lower reflux channel (45) is provided on the other side of the valve body (41). A sliding plug (46) is slidably installed inside the communication channel (42), and a pressure-receiving plate (47) is slidably installed inside the pressure chamber (43). A control spring (48) is fixedly installed between the pressure-receiving plate (47) and the sliding plug (46).

2. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 1, wherein: Both the upper reflux channel (44) and the lower reflux channel (45) are communicated with the communication channel (42), and a sealing ring is fixedly installed on the surface of the pressure-receiving plate (47).

3. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 1, characterized in that: A condenser tube (6) is fixedly installed on the top of the reaction kettle (1), and one end of the condenser tube (6) is communicated with the gas-liquid separation tank (2).

4. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 3, characterized in that: A horizontal condenser (7) is fixedly installed on the surface of the condenser tube (6), and a vertical condenser (8) is fixedly installed on the surface of the condenser tube (6).

5. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 1, characterized in that: A stirring shaft (9) is rotatably installed on the inner top wall of the reaction kettle (1), and stirring blades (10) are fixedly installed on the surface of the stirring shaft (9).

6. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 5, characterized in that: A stirring motor (11) is fixedly installed on the top of the reaction kettle (1), and the output shaft of the stirring motor (11) is fixedly connected to the top end of the stirring shaft (9).

7. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 1, wherein: An outlet pipe (12) is fixedly installed at the bottom of the reaction kettle (1). Legs (13) are fixedly installed at the bottoms of the reaction kettle (1), the gas-liquid separation tank (2), and the liquid buffer and filtration tank (14).

8. The production pressure reflux regulating device based on an unsaturated resin reactor according to claim 1, wherein: A gas control valve (15) is fixedly installed on the top of the gas-liquid separation tank (2), and a liquid control valve (16) is fixedly installed on the surface of the connecting pipe between the gas-liquid separation tank (2) and the liquid buffer and filtration tank (14).

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