Double-valve combined device for high-precision liquid discharging control

Abstract

The utility model discloses a double-valve combination device for high-precision liquid discharging control, and belongs to the technical field of liquid discharging control. A valve A and a valve B are fixedly connected to a feeding pipeline in sequence, any one of the two valves is a regulating valve, and the other valve is a block valve. The opening degree of the regulating valve is kept fixed during repeated use, and only the cut-off valve needs to be opened and closed. When the parameters of the liquid on the supply side and the environment in the reaction kettle are not changed, high-precision control over the flow speed or flow of the liquid flowing through the device is achieved, the valve adjusting time and the observation time for an operator to observe the opening degree of the valve are greatly saved, and the use efficiency of the device is improved. Meanwhile, the opening degree of the regulating valve is fixed, which means that the flow velocity consistency of liquid flowing through the device is high, the accuracy and stability of discharging are greatly improved, the operation difference caused by human factors is reduced, and the production process has good reproducibility. The utility model has the characteristics of simple structure, strong usability and wide application range.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquid discharge control technical field, especially relate to a double valve combination device for high precision liquid discharge control. BACKGROUND

[0002] In the production process of production enterprises, in order to ensure product quality and process stability, improve production efficiency and control cost, the speed or flow of liquid discharge often needs to be accurately controlled, because the adding speed and flow of liquid material have crucial influence on the quality of product.

[0003] Taking the production of pharmaceutical enterprises as an example, in the production link of some medicines, the weighed liquid auxiliary material needs to be added into the reaction kettle at a uniform speed within a specified time, for example, the uniform speed adding operation needs to be completed within 55-60 seconds, if the discharge speed does not meet the requirements, if the discharge speed is too fast or too slow, it can lead to incomplete or excessive drug reaction, thereby seriously affecting the yield and content of medicine, and finally leading to the reduction of production benefit.

[0004] The existing liquid discharge control mode has many problems, for example, most enterprises use a single valve to control liquid discharge, even if the valve has a scale indication, but due to the error of human eye observation, the actual opening degree is often different from the last time when the operator adjusts the valve each time, the higher the accuracy requirement of flow rate or liquid discharge time, the more prominent the adverse consequences caused by the difference. Moreover, each time the valve is adjusted, it is not only troublesome and time-consuming, but also the operation habits and judgment standards of different operators are different, leading to poor reproducibility of operation, the flow rate and flow of each discharge are difficult to keep consistent, and the high-precision production demand cannot be met.

[0005] Therefore, a new technical scheme is urgently needed in the prior art to solve this problem. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to provide a double valve combination device for high precision liquid discharge control, to solve the technical problem that the flow rate and flow of each discharge are difficult to keep consistent due to frequent adjustment of the valve.

[0007] A double valve combination device for high precision liquid discharge control, comprising a reaction kettle, the reaction kettle is fixedly connected with a feed pipe, an A valve and a B valve are fixedly connected in sequence on the feed pipe, and any one of the A valve and the B valve is an adjusting valve, and the other is a shut-off valve.

[0008] The double valve combination device for high precision liquid discharge control, the shut-off valve is a gate valve.

[0009] The utility model relates to a double valve combination device for high-precision liquid discharge control, wherein the cut-off valve is a globe valve.

[0010] The utility model relates to a double valve combination device for high-precision liquid discharge control, wherein the cut-off valve is a globe valve.

[0011] Through the above design scheme, the utility model can bring the following beneficial effects:

[0012] In the utility model, the opening degree of the regulating valve for adjusting the flow is fixed, so that the regulating valve does not need to be repeatedly adjusted every time it is used, and only the on-off valve needs to be opened and closed, thereby greatly saving the valve regulating time and the observation time of the operator observing the valve opening degree, improving the device use efficiency. At the same time, the regulating valve opening degree does not need to be frequently changed, which means that the liquid flow rate consistency through the device is high, greatly improving the discharge accuracy and stability, effectively avoiding the adverse effects on the production process caused by unstable flow rate. In addition, since the regulating valve opening degree is fixed, even if the operator is replaced, the consistency of the discharge process can still be ensured, greatly reducing the operation difference caused by human factors, and making the production process have good reproducibility. Finally, the utility model realizes the goal of accurately controlling the liquid flow rate through the ingenious cooperation between the valves, has simple structure, strong usability, wide application range, and is worth promoting. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further described in combination with the drawings and specific embodiments:

[0014] Figure 1 Figure 1 is a schematic view of the double valve combination device for high-precision liquid discharge control of the utility model;

[0015] In the figure, 1 is a reaction kettle, 2 is a feeding pipeline, 3 is an A valve, and 4 is a B valve. DETAILED DESCRIPTION

[0016] The specific embodiment of the utility model will be further described in detail in combination with the drawings, and it should be noted that although the double valve combination device for high-precision liquid discharge control in the embodiment is used for the feeding pipeline, it is also applicable to the discharge pipeline or other occasions where the liquid discharge needs to be accurately controlled.

[0017] For example, Figure 1The application discloses a double-valve combination device for high-precision liquid feeding control, which comprises a reaction kettle 1, a feeding pipeline 2 fixedly connected with the reaction kettle 1, and an A valve 3 and a B valve 4 fixedly connected with the feeding pipeline 2 in sequence.

[0018] When the device is used for the first time, the shut-off valve is fully opened, the opening degree of the regulating valve is adjusted, and the liquid flow rate or flow volume reaches the requirement of the production enterprise; after the device is used for the first time, the opening degree of the regulating valve is kept unchanged, the shut-off valve is closed, and the liquid is prevented from continuously flowing into the reaction kettle 1; when the device is used again, the opening degree of the regulating valve is kept unchanged, the shut-off valve is fully opened, and the liquid flows into the reaction kettle; since the opening degree of the regulating valve is the same as that in the last time, the liquid parameters on the feeding side and the environment in the reaction kettle 1 are the same as those in the last time, the flow volume and flow rate of the liquid flowing into the reaction kettle 1 through the A valve 3 and the B valve 4 remain unchanged, the purpose of high-precision control of the liquid flow rate or feeding time is achieved, and the consistency of the feeding process when the device is used for multiple times is ensured.

Claims

1. A dual-valve assembly for high-precision liquid discharge control, comprising a reaction vessel (1) and a feed pipe (2) fixedly connected, characterized in that: in A valve (3) and a valve (4) are fixedly connected in sequence on the feeding pipe (2). Either valve (3) or valve (4) is a regulating valve and the other is a shut-off valve.

2. The dual-valve combination device for high-precision liquid discharge control according to claim 1, characterized in that: The shut-off valve is a gate valve.

3. The dual-valve combination device for high-precision liquid discharge control according to claim 1, characterized in that: The shut-off valve is a gate valve.

4. The dual-valve combination device for high-precision liquid discharge control according to claim 1, characterized in that: The shut-off valve is a ball valve.

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