A volatile-proof epoxy diluent dispensing tank

Abstract

The utility model relates to a technical field of chemical equipment, concretely relates to a volatile epoxy diluent batching tank, the utility model provides a volatile epoxy diluent batching tank, including tank body, the feed inlet and breath mouth of setting at the top of tank body, the discharge gate and support leg of setting at the bottom of tank body, the top of tank body is provided with the feeding device of full -enclosed type, the outlet of feeding device is sealedly connected with the feed inlet through a connecting flange, the top of tank body is equipped with the breathing device and pressure sensor still, the breathing device communicates through the pipeline with an inert gas source, the tank body inner wall is provided with the antistatic flow board along the axial direction, the tank body outside is equipped with the controller of electric connection with pressure sensor and breathing device, the utility model discloses through full -enclosed structure, inert gas protection, antistatic design and automation control, effectively solved the volatile problem in the epoxy diluent batching process, has improved production security and efficiency simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a volatile epoxy diluent mixing tank. Background Technology

[0002] Epoxy thinner is a solvent-based additive widely used in polymer materials such as coatings and adhesives. Its main components are volatile organic compounds (such as benzene and esters). During the preparation process, if traditional open or semi-open mixing tanks are used, the materials easily generate large amounts of volatile organic compounds (VOCs) through evaporation. This not only wastes raw materials and increases production costs but also pollutes the working environment. Long-term inhalation of VOC-containing gases can damage the human respiratory and nervous systems and even pose an explosion risk. Therefore, developing an epoxy thinner mixing device that can effectively suppress volatilization and ensure production safety has significant engineering application value.

[0003] In existing technologies, conventional batching tanks generally have the following problems: First, the feeding port is mostly open or has a simple sealing structure, and VOCs leakage is easily caused by the operating gap when the raw material tank is connected to the tank body; Second, the tank body is not equipped with a pressure balancing device, and the pressure fluctuations caused by the volatilization of materials will aggravate gas escape, and there is no inert gas protection mechanism, so oxygen in the air can easily react with epoxy diluents to cause oxidation, affecting product quality; Third, the inner wall of the tank is not equipped with an anti-static structure, and the static electricity generated by friction during the material flow may cause sparks, posing a safety hazard. Utility Model Content

[0004] This invention provides an anti-volatile epoxy diluent mixing tank, which aims to solve the problems of serious material volatilization, pressure runaway, and static electricity risk caused by structural defects in traditional mixing tanks.

[0005] The technical solution provided by this utility model is an anti-volatile epoxy diluent mixing tank, including a tank body, an inlet and a vent at the top of the tank body, an outlet at the bottom of the tank body, and support legs. The top of the tank body is provided with a fully enclosed feeding device, and the outlet of the feeding device is sealed to the inlet through a connecting flange.

[0006] The top of the tank is also equipped with a breathing device and a pressure sensor. The breathing device is connected to an inert gas source through a pipe.

[0007] An anti-static flow guide plate is provided on the inner wall of the tank along the axial direction.

[0008] The tank body is equipped with a controller that is electrically connected to the pressure sensor and the breathing device.

[0009] As a preferred embodiment of the present invention, the feeding device includes a sealed hopper, a pneumatic or electric valve located at the bottom of the sealed hopper, and a sealed extraction pipe for connecting the sealed hopper to the raw material barrel. The pneumatic or electric valve is electrically connected to the controller to control the amount of material fed.

[0010] As a preferred embodiment of this utility model, the top of the sealed hopper is provided with a vacuum feeding interface, which is connected to an external vacuum pump.

[0011] As a preferred embodiment of this utility model, the breathing device includes a breathing valve and a safety valve. The breathing end of the breathing valve is connected to the breathing port on the top of the tank. The inlet end of the breathing valve is connected to the safety valve and the inert gas source pipeline respectively through a three-way pipeline. The outlet end of the breathing valve is connected to an venting pipeline, which extends to an outdoor safe area or is connected to a VOC recovery system.

[0012] As a preferred technical solution of this utility model, the antistatic guide plate consists of at least two pieces, which are evenly distributed along the circumference of the inner wall of the tank. The antistatic guide plate is made of stainless steel and is welded and fixed to the tank body, with its lower end extending to a position close to the bottom of the tank.

[0013] As a preferred technical solution of this utility model, the tank body is further provided with a stirring mechanism, which includes a stirring shaft, a stirring paddle located at the bottom of the stirring shaft, and a motor for driving. The stirring shaft extends from the top of the tank body, and the motor is fixedly connected to the top of the tank body through a reducer.

[0014] As a preferred embodiment of this utility model, the controller is a PLC controller, which receives the signal from the pressure sensor and controls the opening and closing of the solenoid valve connected to the inert gas source in the breathing device to maintain a slightly positive pressure state inside the tank.

[0015] As a preferred embodiment of this utility model, the tank, feeding device, and all connecting pipes and valves are made of stainless steel or carbon steel lined with fluoroplastic.

[0016] As a preferred embodiment of this utility model, the discharge port is connected to a metering pump, which is connected to a controller to control the discharge volume of the discharge port.

[0017] The advantages of this utility model compared with the prior art are as follows:

[0018] 1. Fully enclosed feeding structure: Through the coordinated design of sealed silos, vacuum feeding interfaces and connecting flanges, the raw materials are transported in a fully enclosed manner from drums to tanks, effectively suppressing VOCs leakage during the feeding process.

[0019] 2. Inert gas protection and pressure control: The breathing device combines a breathing valve and a safety valve, which can maintain a slight positive pressure (5-10 kPa) by supplementing nitrogen when the pressure inside the tank fluctuates, thus preventing air from entering and causing an oxidation reaction; at the same time, the safety valve can deal with overpressure conditions and ensure equipment safety.

[0020] 3. Anti-static and material flow guidance: The stainless steel guide plates evenly distributed along the inner wall of the tank can guide the flow of materials, reduce impact splashing, and also dissipate the static electricity generated by material friction, reducing the risk of combustion and explosion.

[0021] 4. Automated control: The PLC controller integrates signal control of pressure sensors, pneumatic / electric valves and metering pumps to achieve precise adjustment of feeding amount, tank pressure and discharge amount, and supports unattended automated production.

[0022] 5. Corrosion-resistant material compatibility: The choice of stainless steel or carbon steel lined with fluoroplastics effectively resists the corrosive effects of epoxy thinner, extending the service life of the equipment. Attached Figure Description

[0023] Figure 1 The present invention relates to a structure for an anti-volatile epoxy diluent mixing tank. Figure 1 .

[0024] Figure 2 The present invention relates to a structure for an anti-volatile epoxy diluent mixing tank. Figure 2 .

[0025] Figure 3 This is a cross-sectional three-dimensional structural diagram of a volatile-resistant epoxy diluent mixing tank according to this utility model.

[0026] Figure 4 This is a structural diagram of the breathing device of a volatile epoxy diluent mixing tank according to the present invention.

[0027] As shown in the figure:

[0028] 1. Tank body; 2. Inlet; 3. Breather port; 4. Outlet; 5. Support legs; 6. Feeding device; 7. Connecting flange; 8. Breathing device; 9. Pressure sensor; 10. Antistatic guide plate; 11. Controller; 12. Sealed silo; 13. Electric valve; 14. Sealed extraction pipe; 15. Vacuum feeding interface; 16. Breathing valve; 17. Safety valve; 18. Drain pipe; 19. Agitator; 20. Agitator shaft; 21. Agitator paddle; 22. Motor; 23. Metering pump. Detailed Implementation

[0029] 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.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1:

[0032] As per the instruction manual Figure 1-3 As shown, an anti-volatile epoxy diluent mixing tank includes a tank body 1, an inlet 2 and a vent 3 located at the top of the tank body 1, an outlet 4 located at the bottom of the tank body 1, and support legs 5.

[0033] In this utility model, a fully enclosed feeding device 6 is provided on the top of the tank 1. The outlet of the feeding device 6 is sealed to the inlet 2 through a connecting flange 7. The feeding device 6 includes a sealed hopper 12, an electric valve 13 located at the bottom of the sealed hopper 12, and a sealed extraction pipe 14 for connecting the sealed hopper 12 to the raw material barrel. The electric valve 13 is electrically connected to the controller 11 to control the amount of material fed. The top of the sealed hopper 12 is provided with a vacuum feeding interface 15, which is connected to an external vacuum pump. The vacuum pump creates a negative pressure inside the sealed hopper 12, drawing the raw material from the raw material barrel into the sealed hopper 12 through the sealed extraction pipe.

[0034] In this utility model, the top of the tank 1 is also provided with a breathing device 8 and a pressure sensor 9. The breathing device 8 is connected to an inert gas source through a pipe. The inert gas source is a nitrogen supply device.

[0035] In this utility model, an antistatic guide plate 10 is provided on the inner wall of the tank 1 along the axial direction. There are three antistatic guide plates 10, which are evenly distributed along the circumference of the inner wall of the tank 1. The antistatic guide plate 10 is made of stainless steel and is welded and fixed to the tank 1. Its lower end extends to a position close to the bottom of the tank.

[0036] In this utility model, a stirring mechanism 19 is also provided inside the tank body 1. The stirring mechanism 19 includes a stirring shaft 20, a stirring paddle 21 located at the bottom of the stirring shaft 20, and a motor 22 for driving. The stirring shaft 20 extends from the top of the tank body 1, and the motor 22 is fixedly connected to the top of the tank body 1 through a reducer.

[0037] In this utility model, a metering pump 23 is connected to the discharge port 4, and the metering pump 23 is connected to the controller 11 to control the discharge amount of the discharge port 4.

[0038] In this utility model, a controller 11 electrically connected to a pressure sensor 9 and a breathing device 8 is provided outside the tank body 1. The controller 11 is a PLC controller 11, which receives the signal from the pressure sensor 9 and controls the opening and closing of the solenoid valve in the breathing device 8 connected to the inert gas source to maintain a slightly positive pressure state inside the tank.

[0039] In this utility model, the tank body 1, the feeding device 6, and all connecting pipes and valves are made of stainless steel or carbon steel lined with fluoroplastic.

[0040] As per the instruction manual Figure 4 As shown, the breathing device 8 includes a breathing valve 16 and a safety valve 17. The breathing end of the breathing valve 16 is connected to the breathing port 3 on the top of the tank 1 (via flange connection). The inlet end of the breathing valve 16 is connected to the safety valve 17 and the inert gas source pipeline via a three-way pipeline. The outlet end of the breathing valve 16 is connected to an exhaust pipeline 18, which extends to an outdoor safe area or is connected to a VOC recovery system. The breathing valve 16 is a nitrogen sealing valve with a set pressure of 5-10 kPa positive pressure and -1 to -3 kPa negative pressure. The safety valve 17 is a pressure relief valve, which relieves pressure when the internal pressure is too high.

[0041] Working principle

[0042] 1. Raw material feeding: The external vacuum pump is started, and the epoxy diluent in the raw material barrel is pumped to the sealed silo 12 through the vacuum feeding interface 15; the PLC controller 11 controls the electric valve 13 to open according to the process requirements, and the raw material falls into the tank 1 through the connecting flange 7.

[0043] 2. Pressure balance: During the feeding process, the pressure inside tank 1 increases due to the addition of materials. When the pressure exceeds 10 kPa, the breather valve 16 automatically opens to exhaust gas. If the pressure is lower than 5 kPa, the breather valve 16 opens to replenish nitrogen and maintain a slightly positive pressure state to prevent air from entering.

[0044] 3. Material mixing: The stirring motor 22 starts and drives the stirring shaft 20 to rotate through the reducer. The stirring paddle 21 mixes the materials evenly. The anti-static guide plate 10 guides the flow of materials synchronously, reducing splashing and dissipating static electricity.

[0045] 4. Discharge control: After mixing is completed, the PLC controller 11 starts the metering pump 23 and delivers the epoxy diluent to the subsequent process through the discharge port 4. The speed of the metering pump 23 is precisely adjusted by the controller 11 according to the process requirements.

[0046] 5. Safety assurance: If the pressure inside the tank exceeds 15 kPa due to abnormal operating conditions (such as a sudden temperature rise), the safety valve 17 will automatically open to release pressure and avoid safety accidents. In addition, during use, the gas discharged through the breather valve 16 will be led to the outside or the VOC recovery system for treatment through the venting pipe 18.

[0047] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A volatile-resistant epoxy diluent mixing tank, comprising a tank body (1), an inlet (2) and a vent (3) disposed at the top of the tank body (1), an outlet (4) disposed at the bottom of the tank body (1), and support legs (5), characterized in that: The top of the tank (1) is equipped with a fully enclosed feeding device (6), and the outlet of the feeding device (6) is sealed to the inlet (2) through a connecting flange (7); The top of the tank (1) is also provided with a breathing device (8) and a pressure sensor (9), and the breathing device (8) is connected to an inert gas source through a pipe; The inner wall of the tank (1) is provided with an anti-static guide plate (10) along the axial direction; The tank (1) is equipped with a controller (11) that is electrically connected to the pressure sensor (9) and the breathing device (8).

2. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The feeding device (6) includes a sealed hopper (12), a pneumatic or electric valve (13) located at the bottom of the sealed hopper (12), and a sealed feeding pipe (14) for connecting the sealed hopper (12) to the raw material barrel. The pneumatic or electric valve (13) is electrically connected to the controller (11) to control the amount of material fed.

3. The epoxy diluent mixing tank for preventing volatilization according to claim 2, characterized in that: The sealed hopper (12) is provided with a vacuum feeding interface (15) at the top, and the vacuum feeding interface (15) is connected to an external vacuum pump.

4. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The breathing device (8) includes a breathing valve (16) and a safety valve (17). The breathing end of the breathing valve (16) is connected to the breathing port (3) at the top of the tank (1). The inlet end of the breathing valve (16) is connected to the safety valve (17) and the inert gas source pipeline respectively through a three-way pipeline. The outlet end of the breathing valve (16) is connected to an venting pipe (18). The venting pipe (18) extends to an outdoor safe area or is connected to a VOC recovery system.

5. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The antistatic guide plate (10) consists of at least two pieces, which are evenly distributed along the inner wall of the tank (1). The antistatic guide plate (10) is made of stainless steel and is welded and fixed to the tank (1). Its lower end extends to a position close to the bottom of the tank.

6. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The tank (1) is also equipped with a stirring mechanism (19), which includes a stirring shaft (20), a stirring paddle (21) located at the bottom of the stirring shaft (20), and a motor (22) for driving. The stirring shaft (20) extends from the top of the tank (1), and the motor (22) is fixedly connected to the top of the tank (1) through a reducer.

7. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The controller (11) is a PLC controller (11), which receives the signal from the pressure sensor (9) and controls the opening and closing of the solenoid valve connected to the inert gas source in the breathing device (8) to maintain a slightly positive pressure state inside the tank.

8. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The tank (1), feeding device (6), and all connecting pipes and valves are made of stainless steel or carbon steel lined with fluoroplastic.

9. The epoxy diluent mixing tank for preventing volatilization according to claim 1, characterized in that: The discharge port (4) is connected to a metering pump (23), which is connected to a controller (11) to control the discharge amount of the discharge port (4).

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