Quantitative adding device for PI resin solvent

Abstract

The utility model relates to a PI resin solvent quantitative adding device which comprises a weighing support, a solvent metering tank and a plurality of stirring kettles, the solvent metering tank is installed on the weighing support through a weighing sensor, a fast-forward pipeline and a slow-forward pipeline are arranged on the top of the solvent metering tank, a fast-forward electromagnetic valve is arranged on the fast-forward pipeline, a slow-forward electromagnetic valve is arranged on the slow-forward pipeline, and the stirring kettles are arranged on the stirring kettles. The fast inlet pipeline and the slow inlet pipeline are jointly connected with a liquid inlet pipeline, a liquid inlet pump is arranged on the liquid inlet pipeline, a main liquid outlet is formed in the bottom of the solvent metering tank, a liquid outlet electromagnetic valve is arranged on the main liquid outlet, the main liquid outlet is connected with a liquid outlet pipeline, a liquid outlet pump is arranged on the liquid outlet pipeline, the liquid outlet pipeline is connected with a plurality of liquid distribution pipelines, and liquid distribution electromagnetic valves are arranged on the liquid distribution pipelines. And the liquid separation pipelines are respectively connected with the corresponding stirring kettles. According to the utility model, the metering and feeding time can be saved, the metering precision can be controlled, a solvent can be quantitatively injected into the stirring kettle, and a better resin preparation effect is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PI resin preparation, especially to a PI resin solvent quantitative adding device. BACKGROUND

[0002] In the PI resin preparation process, in order to guarantee the resin solid content and the fullness of subsequent solid material reaction, and the corresponding resin viscosity, the adding amount of DMAC solvent must be accurate with 0.05% allowable error. The traditional DMAC solvent adding operation adopts two ways of magnetic reed liquid level control and rotor flowmeter control. The magnetic reed liquid level control is greatly influenced by the gas bubble amount in medium and the precision of configuration valve rod, suspension piece and other parts, and the manufacturing precision of these parts is limited, so the precision of liquid level meter is also influenced. The rotor flowmeter control way has high requirement for the cleanliness of medium due to the characteristics of rotor flowmeter, once some impurities and small particles are gathered, the precision and stability will be influenced, and the maintenance probability will also be increased. SUMMARY

[0003] The utility model aims at solving the insufficient of prior art, and provides a PI resin solvent quantitative adding device.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A PI resin solvent quantitative adding device, including weighing support, solvent metering tank and a plurality of stirring kettle, the weighing support is installed with a plurality of weighing sensors on the circumference, the solvent metering tank is uniformly distributed with a plurality of support frames on the circumference of the side wall, the support frame is arranged on the weighing sensor, the solvent metering tank top is equipped with fast feed pipeline and slow feed pipeline, the fast feed pipeline is equipped with fast feed solenoid valve, the slow feed pipeline is equipped with slow feed solenoid valve, the fast feed pipeline and slow feed pipeline are connected with liquid inlet pipeline, the liquid inlet pipeline is equipped with liquid inlet pump, the solvent metering tank bottom is equipped with main liquid discharge port, the main liquid discharge port is equipped with liquid discharge solenoid valve, the main liquid discharge port is connected with liquid discharge pipeline, the liquid discharge pipeline is equipped with liquid discharge pump, the liquid discharge pipeline is connected with a plurality of branch liquid pipelines, the branch liquid pipeline is equipped with branch liquid solenoid valve, and the branch liquid pipeline is connected with the corresponding stirring kettle.

[0006] The bottom of the solvent metering tank is provided with a standby liquid discharge port, the standby liquid discharge port is provided with a liquid discharge standby valve, and the standby liquid discharge port is connected with the liquid discharge pipeline.

[0007] It also includes a control cabinet, the weighing sensor, the fast feed solenoid valve, the slow feed solenoid valve, the liquid inlet pump, the liquid discharge solenoid valve, the liquid discharge pump and the branch liquid solenoid valve are connected with the control cabinet.

[0008] The utility model has the advantages that the utility model can save the time of metering feeding, control the precision of metering, can quantitatively inject solvent into the stirring kettle, and guarantees better resin preparation effect. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a front view of the present application;

[0010] Fig. 2 is a top view of the present application;

[0011] In the figure: 1-weighing support; 2-solvent metering tank; 3-stirring kettle; 4-weighing sensor; 5-support frame; 6-fast feed pipeline; 7-slow feed pipeline; 8-fast feed electromagnetic valve; 9-slow feed electromagnetic valve; 10-liquid inlet pipeline; 11-liquid inlet pump; 12-main liquid outlet; 13-liquid discharge electromagnetic valve; 14-liquid discharge pipeline; 15-liquid discharge pump; 16-liquid distribution pipeline; 17-liquid distribution electromagnetic valve; 18-standby liquid discharge outlet; 19-liquid discharge standby valve; 20-manual control valve; 21-bypass pipe; 22-on-off valve; 23-control cabinet;

[0012] The present application will be described in detail below with reference to the embodiments thereof and the accompanying drawings. DETAILED DESCRIPTION

[0013] The principles and features of the present application will be described below in conjunction with the accompanying drawings and embodiments. The embodiments are only used to explain the present application and are not intended to limit the scope of the present application. In the following paragraphs, the present application will be described in more detail with reference to the accompanying drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that the drawings are greatly simplified and use non-precise proportions, only to facilitate and clarify the purpose of assisting in the description of the embodiments of the present application.

[0014] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as being "provided" to another component, it can be directly provided on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0016] The present application will be further described below in conjunction with the accompanying drawings and embodiments:

[0017] As Figs. 1-2 shown, a PI resin solvent quantitative adding device includes a weighing support 1, a solvent metering tank 2, a stirring tank 3, a weighing sensor 4, a support frame 5, a fast feeding pipeline 6, a slow feeding pipeline 7, a fast feeding electromagnetic valve 8, a slow feeding electromagnetic valve 9, a liquid inlet pipeline 10, a liquid inlet pump 11, a main liquid outlet 12, a liquid outlet electromagnetic valve 13, a liquid outlet pipeline 14, a liquid outlet pump 15, a liquid distribution pipeline 16, a liquid distribution electromagnetic valve 17, a standby liquid outlet 18, a liquid outlet standby valve 19, a manual control valve 20, a bypass pipe 21, an on-off valve 22, and a control cabinet 23.

[0018] The weighing support 1 includes a horizontal frame, a plurality of support columns are arranged at the bottom of the horizontal frame, and a diagonal brace is arranged at each of the four inner side corners of the horizontal frame.

[0019] A plurality of weighing sensors 4 are circumferentially arranged on the weighing support 1, and the three weighing sensors 4 are arranged on one side frame of the horizontal frame, and the other two are arranged on the two diagonal braces.

[0020] A plurality of support frames 5 are circumferentially arranged on the side wall of the solvent metering tank 2, the support frames 5 correspond to the weighing sensors 4 one by one, and the support frames 5 are arranged on the weighing sensors 4.

[0021] The stirring tank 3 is provided with a stirring shaft, the stirring shaft is connected with a stirring motor, and the stirring shaft is provided with stirring paddles.

[0022] The solvent metering tank 2 is provided with the fast feeding pipeline 6 and the slow feeding pipeline 7, the fast feeding electromagnetic valve 8 is arranged on the fast feeding pipeline 6, the slow feeding electromagnetic valve 9 is arranged on the slow feeding pipeline 7, the fast feeding pipeline 6 and the slow feeding pipeline 7 are jointly connected with the liquid inlet pipeline 10, the liquid inlet pump 11 is arranged on the liquid inlet pipeline 10, the bottom of the solvent metering tank 2 is provided with the main liquid outlet 12, the main liquid outlet 12 is provided with the liquid outlet electromagnetic valve 13, the main liquid outlet 12 is connected with the liquid outlet pipeline 14, the liquid outlet pipeline 14 is provided with the liquid outlet pump 15, the liquid outlet pipeline 14 is connected with a plurality of liquid distribution pipelines 16, the liquid distribution pipelines 16 are provided with the liquid distribution electromagnetic valves 17, and the liquid distribution pipelines 16 are connected with the corresponding stirring tanks 3.

[0023] The bottom of the solvent metering tank 2 is provided with the standby liquid outlet 18, the standby liquid outlet 18 is provided with the liquid outlet standby valve 19, and the standby liquid outlet 18 is connected with the liquid outlet pipeline 14.

[0024] The manual control valve 20 is arranged on the main liquid outlet 12.

[0025] The bypass pipe 21 is connected in parallel with the liquid distribution electromagnetic valve 17 on the liquid distribution pipeline 16, and the on-off valve 22 is arranged on the bypass pipe 21.

[0026] Also includes control cabinet 23, weighing sensor 4, fast forward solenoid valve 8, slow forward solenoid valve 9, liquid inlet pump 11, liquid discharge solenoid valve 13, liquid discharge pump 15, liquid distribution solenoid valve 17 are connected with control cabinet 23.

[0027] Control cabinet 23 uses the conventional product on the market, that is, as long as the control function can be realized. For example, the commonly used PLC control cabinet model can be used, including Siemens S7-1200, S7-1500 series, Omron CP1E, CP1L, CP1H series, etc.

[0028] The utility model works, according to the process formula, set the required weight on the touch screen of control cabinet 23, set the weight of fast forward, the weight of slow forward, the frequency of fast forward, the frequency of slow forward (this step is to reduce the liquid inertia and the error of liquid inlet in the process of valve closure), when fast forward liquid, the frequency of liquid inlet pump 11 is set high, and the feeding time is saved, reaches the set fast forward weight, and the fast forward solenoid valve 8 is automatically closed, and the slow forward solenoid valve 9 is opened, and the frequency of liquid inlet pump 11 is reduced to the slow forward frequency, and the slow forward pipeline 7 is thinner than the fast forward pipeline 6, and reaches the set weight, and the slow forward solenoid valve 9 is closed.

[0029] Example: the process formula needs 850kg solvent, sets the total liquid inlet quantity as 850kg, the fast forward weight as 830kg, the slow forward weight as 20kg, the fast forward frequency as 50hz, and the slow forward frequency as 10hz, and when working, the weighing sensor 4 captures 830kg, and is converted to slow forward, and the remaining 20kg is added, and after multiple adjustments, the time is saved as much as possible, and the accuracy reaches 0.05%.

[0030] After liquid inlet is finished, according to the site condition, the corresponding stirred tank 3, liquid distribution solenoid valve 17 and liquid discharge solenoid valve 13, liquid discharge pump 15 of solvent metering tank 2 are automatically opened, the solvent in solvent metering tank 2 is all pumped into the corresponding stirred tank 3, when the weighing sensor 4 captures zero, the liquid discharge pump 15 stops, and the liquid distribution solenoid valve 17 and the liquid discharge solenoid valve 13 are closed.

[0031] The utility model has been described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various improvements are made by adopting the method concept and technical scheme of the utility model, or direct application in other occasions without improvement, which are all within the protection scope of the utility model.

Claims

1. A device for quantitatively adding PI resin solvent, characterized in that, The system includes a weighing support (1), a solvent metering tank (2), and several mixing vessels (3). Several weighing sensors (4) are mounted circumferentially on the weighing support (1). Several support frames (5) are evenly distributed circumferentially on the side wall of the solvent metering tank (2). The support frames (5) are mounted on the weighing sensors (4). A fast-inlet pipe (6) and a slow-inlet pipe (7) are located at the top of the solvent metering tank (2). A fast-inlet solenoid valve (8) is installed on the fast-inlet pipe (6), and a slow-inlet solenoid valve (9) is installed on the slow-inlet pipe (7). 7) A common inlet pipe (10) is connected to the solvent metering tank (2). The inlet pipe (10) is equipped with an inlet pump (11). The bottom of the solvent metering tank (2) is equipped with a main drain port (12). The main drain port (12) is equipped with a drain solenoid valve (13). The main drain port (12) is connected to a drain pipe (14). The drain pipe (14) is equipped with a drain pump (15). The drain pipe (14) is connected to several distribution pipes (16). The distribution pipes (16) are equipped with distribution solenoid valves (17). The distribution pipes (16) are respectively connected to the corresponding stirring tank (3).

2. The PI resin solvent quantitative addition device according to claim 1, characterized in that, The solvent metering tank (2) is equipped with a spare drain port (18) at the bottom, and a spare drain valve (19) is provided on the spare drain port (18). The spare drain port (18) is connected to the drain pipe (14).

3. The PI resin solvent quantitative addition device according to claim 2, characterized in that, A manual control valve (20) is provided on the main drain port (12).

4. The PI resin solvent quantitative addition device according to claim 2, characterized in that, A bypass pipe (21) is connected in parallel to the liquid separation solenoid valve (17) on the liquid separation pipe (16), and an on / off valve (22) is provided on the bypass pipe (21).

5. The PI resin solvent quantitative addition device according to claim 4, characterized in that, It also includes a control cabinet (23), a weighing sensor (4), a fast-in solenoid valve (8), a slow-in solenoid valve (9), an inlet pump (11), a drain solenoid valve (13), a drain pump (15), and a dispensing solenoid valve (17), all of which are connected to the control cabinet (23).

6. The PI resin solvent quantitative addition device according to claim 5, characterized in that, The weighing support (1) includes a horizontal frame, with several support columns at the bottom of the horizontal frame and diagonal braces at the four inner corners of the horizontal frame.

7. The PI resin solvent quantitative addition device according to claim 6, characterized in that, There are three weighing sensors (4), one of which is located on one side of the horizontal frame, and the other two are located on the two diagonal braces.

8. The PI resin solvent quantitative addition device according to claim 7, characterized in that, The mixing vessel (3) is equipped with a stirring shaft, which is connected to a stirring motor and has stirring blades.

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