CN220696391U - Solution preparing and filling device - Google Patents

Abstract

The utility model belongs to the technical field of solution blending, and discloses a solution blending and filling device which comprises a solution mixing barrel, a first stock solution conveying mechanism, a second stock solution conveying mechanism, an internal circulation mechanism and a solution output mechanism. The first stock solution barrel is communicated with the solution mixing barrel through a first input pipeline, and the first pump body and the first flowmeter are sequentially arranged on the first input pipeline and positioned at the downstream of the first stock solution barrel; the second stock solution barrel is communicated with the solution mixing barrel through a second input pipeline, and the second pump body and the second flowmeter are sequentially arranged on the second input pipeline and positioned at the downstream of the second stock solution barrel; the inlet and the outlet of the internal circulation pipeline are both communicated with the solution mixing barrel, the inlet of the internal circulation pipeline is positioned at the bottom of the solution mixing barrel, and the third pump body is arranged on the internal circulation pipeline; the solution output mechanism is communicated with the third pump body and is used for conveying the solution to the solution demand end. The utility model can reduce the frequency of solution preparation, simplify the operation process and shorten the operation time.

Description

Solution preparing and filling device

Technical Field

The utility model relates to the technical field of solution preparation, in particular to a solution preparation and filling device.

Background

In industrial production and various experiments for the purpose of industrial production, various mixed solutions are often used, so the preparation of the solutions is also particularly critical.

The traditional steps for preparing the solution are as follows: calculating, weighing, dissolving, transferring, washing, fixing volume and shaking uniformly. The method is generally operated manually by an experimenter, and secondary allocation is needed when the primary usage amount is insufficient, so that manpower resources are wasted greatly. Meanwhile, the method has the advantages of more steps, long time consumption, and possibility of interrupting the supply of the solution at the required end in the secondary blending process, so that the experiment is affected, and even the experiment result is damaged.

Therefore, a solution preparing and filling device is needed to solve the above problems.

Disclosure of Invention

The utility model aims to provide a solution blending and filling device which can reduce the frequency of solution blending, simplify the operation process and shorten the operation time.

To achieve the purpose, the utility model adopts the following technical scheme:

solution preparing and filling device includes:

a solution mixing barrel;

the first stock solution conveying mechanism comprises a first stock solution barrel, a first input pipeline, a first pump body and a first flowmeter, wherein the first stock solution barrel is communicated with the solution mixing barrel through the first input pipeline, and the first pump body and the first flowmeter are sequentially arranged on the first input pipeline and are positioned at the downstream of the first stock solution barrel;

the second stock solution conveying mechanism comprises a second stock solution barrel, a second input pipeline, a second pump body and a second flowmeter, wherein the second stock solution barrel is communicated with the solution mixing barrel through the second input pipeline, and the second pump body and the second flowmeter are sequentially arranged on the second input pipeline and are positioned at the downstream of the second stock solution barrel;

the internal circulation mechanism comprises an internal circulation pipeline and a third pump body, wherein an inlet and an outlet of the internal circulation pipeline are both communicated with the solution mixing barrel, the inlet of the internal circulation pipeline is positioned at the bottom of the solution mixing barrel, and the third pump body is arranged on the internal circulation pipeline;

and the solution output mechanism is communicated with the third pump body and is configured to convey the solution to the solution demand end.

Optionally, the device further comprises a solution mixing pipe, wherein the outlet of the first input pipeline and the outlet of the second input pipeline are both communicated with the solution mixing pipe, and the outlet of the solution mixing pipe is communicated with the solution mixing barrel.

Optionally, the first stock solution conveying mechanism further comprises a first pressure reducing valve, and the first pressure reducing valve is arranged on the first input pipeline and is positioned at the downstream of the first pump body;

the second stock solution conveying mechanism further comprises a second pressure reducing valve, wherein the second pressure reducing valve is arranged on the second input pipeline and is positioned at the downstream of the second pump body.

Optionally, the first stock solution conveying mechanism further comprises a first stop valve, and the first stop valve is arranged on the first input pipeline and is positioned at the downstream of the first pressure reducing valve;

the second stock solution conveying mechanism further comprises a second stop valve, wherein the second stop valve is arranged on the second input pipeline and is positioned at the downstream of the second pressure reducing valve.

Optionally, the device further comprises a safety protection mechanism, wherein the safety protection mechanism comprises a first pipeline and a pressure relief valve, one end of the first pipeline is communicated with the solution mixing barrel, the other end of the first pipeline is communicated with the internal circulation pipeline and is positioned at the downstream of the third pump body, and the pressure relief valve is arranged on the first pipeline.

Optionally, the solution output mechanism includes output pipeline, first valve and third relief pressure valve, output pipeline intercommunication in the third pump body with between the solution demand end, first valve with the third relief pressure valve all set up in output pipeline, the third relief pressure valve is located the upper reaches of first valve.

Optionally, the output pipeline is communicated with the internal circulation pipeline, and a communication point of the output pipeline and the internal circulation pipeline is located at the downstream of the third pump body.

Optionally, the internal circulation pipeline is provided with a second valve, and the second valve is located at the downstream of the connection point of the output pipeline and the internal circulation pipeline and the connection point of the first pipeline and the internal circulation pipeline.

Optionally, a solution concentration detection device is further included and configured to detect the concentration of the solution in the solution mixing tank.

Optionally, the device further comprises a liquid level detection device, which is arranged in the solution mixing barrel and used for detecting the liquid level of the solution in the solution mixing barrel.

The utility model has the beneficial effects that:

the solution preparing and filling device provided by the utility model comprises a solution mixing barrel, a first stock solution conveying mechanism, a second stock solution conveying mechanism, an internal circulation mechanism and a solution output mechanism. The first stock solution barrel is communicated with the solution mixing barrel through a first input pipeline, and the first pump body and the first flowmeter are sequentially arranged on the first input pipeline and positioned at the downstream of the first stock solution barrel; the second stock solution bucket and solution mixing bucket pass through second input pipeline intercommunication, and the second pump body and second flowmeter set gradually on the second input pipeline, and are located the low reaches of second stock solution bucket. That is, the first stock solution conveying mechanism and the second stock solution conveying mechanism are used for injecting the stock solution to be mixed into the solution mixing barrel. The first flowmeter and the second flowmeter can respectively detect the input flow of the two stock solutions, ensure the proportion of the two stock solutions and further obtain the mixed solution with the concentration required by the target. The internal circulation mechanism comprises an internal circulation pipeline and a third pump body, wherein an inlet and an outlet of the internal circulation pipeline are both communicated with the solution mixing barrel, the inlet of the internal circulation pipeline is positioned at the bottom of the solution mixing barrel, and the third pump body is arranged on the internal circulation pipeline. The internal circulation mechanism can form an internal circulation loop for the two stock solutions in the solution mixing barrel so as to fully mix the two stock solutions. The solution output mechanism is communicated with the third pump body and is used for conveying the mixed solution to the solution demand end. The solution preparing and filling device can reduce the frequency of solution preparing, simplify the operation process and shorten the operation time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a solution preparing and filling device according to an embodiment of the present utility model.

In the figure:

1. a solution mixing barrel; 11. a solution mixing tube;

2. a first stock solution conveying mechanism; 21. a first stock solution barrel; 22. a first input line; 23. a first pump body; 24. a first flowmeter; 25. a first pressure reducing valve; 26. a first stop valve;

3. a second stock solution conveying mechanism; 31. a second stock solution barrel; 32. a second input line; 33. a second pump body; 34. a second flowmeter; 35. a second pressure reducing valve; 36. a second shut-off valve;

4. an internal circulation mechanism; 41. an internal circulation pipeline; 42. a third pump body; 43. a second valve;

5. a solution output mechanism; 51. an output line; 52. a first valve; 53. a third pressure reducing valve;

61. a first pipeline; 62. a pressure release valve;

7. a solution concentration detection device;

8. and a liquid level detection device.

Detailed Description

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1, the present embodiment provides a solution preparing and filling device, which can uniformly mix multiple stock solutions and then supply the mixed stock solutions to a demand end system for use. The solution blending and filling device comprises a solution mixing barrel 1, a first stock solution conveying mechanism 2, a second stock solution conveying mechanism 3, an internal circulation mechanism 4 and a solution output mechanism 5.

The first stock solution conveying mechanism 2 comprises a first stock solution barrel 21, a first input pipeline 22, a first pump body 23 and a first flowmeter 24. The first stock solution barrel 21 is communicated with the solution mixing barrel 1 through a first input pipeline 22, and a first pump body 23 and a first flowmeter 24 are sequentially arranged on the first input pipeline 22 and positioned at the downstream of the first stock solution barrel 21. The second stock solution conveying mechanism 3 includes a second stock solution barrel 31, a second input pipe 32, a second pump body 33, and a second flowmeter 34. The second stock solution barrel 31 is communicated with the solution mixing barrel 1 through a second input pipeline 32, and a second pump body 33 and a second flowmeter 34 are sequentially arranged on the second input pipeline 32 and positioned at the downstream of the second stock solution barrel 31. The internal circulation mechanism 4 includes an internal circulation pipe 41 and a third pump body 42. The inlet and the outlet of the internal circulation pipeline 41 are both communicated with the solution mixing barrel 1, the inlet of the internal circulation pipeline 41 is positioned at the bottom of the solution mixing barrel 1, and the third pump body 42 is arranged on the internal circulation pipeline 41. The solution output mechanism 5 communicates with the third pump body 42 and is configured to deliver the solution to the solution demand side.

That is, the first stock solution transporting mechanism 2 and the second stock solution transporting mechanism 3 are used to inject the stock solution to be mixed into the solution mixing tub 1. The first flowmeter 24 and the second flowmeter 34 can detect the input flow rate of the two kinds of stock solutions respectively, ensure the proportion of the two kinds of stock solutions, and further obtain the mixed solution with the concentration required by the target. The internal circulation mechanism 4 can form an internal circulation loop for the two stock solutions in the solution mixing barrel 1 so as to fully mix the two stock solutions. The solution output mechanism 5 is used for delivering the mixed solution to the solution demand end. The solution preparing and filling device can reduce the frequency of solution preparing, simplify the operation process and shorten the operation time. In this embodiment, there are two kinds of stock solutions to be mixed, and the two kinds of stock solutions are conveyed by the first stock solution conveying mechanism 2 and the second stock solution conveying mechanism 3, respectively. Of course, in other embodiments, the solution preparing and filling device may further include a third stock solution delivering mechanism and a fourth stock solution delivering mechanism, etc. to perform mixing of more kinds of stock solutions, which is not limited herein.

Optionally, with continued reference to fig. 1, the solution compounding and filling device further includes a solution mixing tube 11. The outlet of the first input pipeline 22 and the outlet of the second input pipeline 32 are both communicated with the solution mixing pipe 11, and the outlet of the solution mixing pipe 11 is communicated with the solution mixing barrel 1. The solution mixing pipe 11 can premix the liquids from the first and second stock solution tanks 21 and 31, and improve the mixing efficiency of the two stock solutions.

Specifically, the first stock solution conveying mechanism 2 further includes a first pressure reducing valve 25, and the first pressure reducing valve 25 is disposed on the first input line 22 and downstream of the first pump body 23. The first pressure reducing valve 25 can adjust the upstream and downstream pressure difference, and ensures the normal operation of the first pump body 23. Correspondingly, the second stock solution conveying mechanism 3 further comprises a second pressure reducing valve 35, and the second pressure reducing valve 35 is arranged on the second input pipeline 32 and is positioned downstream of the second pump body 33. The second pressure reducing valve 35 can adjust the upstream and downstream pressure difference, and ensure the normal operation of the second pump body 33.

More specifically, the first stock solution transporting mechanism 2 further includes a first stop valve 26, and the first stop valve 26 is disposed on the first input line 22 downstream of the first pressure reducing valve 25. The first shut-off valve 26 is capable of controlling the flow and on-off of the liquid on the first inlet line 22. Correspondingly, the second stock solution conveying mechanism 3 further comprises a second stop valve 36, wherein the second stop valve 36 is arranged on the second input pipeline 32 and is positioned downstream of the second pressure reducing valve 35. The second shut-off valve 36 functions in the same way as the first shut-off valve 26 and will not be described in detail here.

Optionally, the solution preparing and filling device further comprises a solution concentration detecting device 7. In this embodiment, the solution concentration detecting device 7 is a handheld densitometer, and the concentration of the solution in the solution mixing tank 1 is obtained by measuring the solution density with the densitometer.

The solution is prepared by the solution preparation and filling device, the solution needs to be preset firstly, and after the preset is successful, the solution preparation and filling device can continuously provide the solution with the target concentration. The solution pre-adjustment comprises the following steps:

the concentration value of the target solution is known as a, and the calculated value c and the calculated value d of the ratio of the stock solution 1 to the stock solution 2 are obtained through calculation. The downstream pressure set points of the first pressure reducing valve 25 and the second pressure reducing valve 35 are e1, e2, respectively. The first pump body 23 and the second pump body 33 are opened, respectively, and at this time, the internal circulation mechanism 4 and the solution output mechanism 5 are both in a closed state. The first pump body 23 extracts the stock solution 1 in the first stock solution barrel 21, is connected to the solution mixing pipe 11, the second pump body 33 extracts the stock solution 2 in the second stock solution barrel 31, is connected to the solution mixing pipe 11, and flows into the solution mixing barrel 1 through the outlet of the solution mixing pipe 11 after the two stock solutions are mixed. At this time, the internal circulation mechanism 4 is opened, the third pump body 42 pumps the liquid in the solution mixing barrel 1, and then the liquid flows into the solution mixing barrel 1 again through the internal circulation pipeline 41, so that the two stock solutions are promoted to be fully mixed. The flow rate of the stock solution 1 is regulated by the first shut-off valve 26, and the value of the first flow meter 24 is observed to be equal to the calculated value c. The flow rate of the stock solution 2 is regulated by the second shut-off valve 36, and the value of the second flow meter 34 is observed to be equal to the calculated value d. The solution concentration in the solution mixing tank 1 is measured by the solution concentration detecting means 7 to obtain a measured value f, and compared with a target solution concentration value a.

If the measured value f=the target value a, the concentration of the solution in the solution mixing tank 1 coincides with the required concentration, and the solution preconditioning succeeds. If the measured value f is greater than the target value a, the ratio of the raw solution 2 in the solution mixing barrel 1 is higher, the opening of the first stop valve 26 is increased, the flow rate of the raw solution 1 is increased until the measured value f=target value a, and at this time, the pressure at the upper end of the first pressure reducing valve 25 is increased, and the pressure is reduced to a set value e1 through the first pressure reducing valve 25, so that the first pump body 23 can normally operate. If the measured value f is smaller than the target value a, the ratio of the raw solution 1 in the solution mixing barrel 1 is higher, the opening of the second stop valve 36 is increased, the flow rate of the raw solution 2 is increased until the measured value f=target value a, and at the moment, the pressure at the upper end of the second pressure reducing valve 35 is increased, and the pressure is reduced to a set value e2 through the second pressure reducing valve 35, so that the second pump body 33 can normally operate.

Optionally, as shown in fig. 1, the solution preparing and filling device further comprises a safety protection mechanism. The safety protection mechanism comprises a first pipeline 61 and a pressure relief valve 62, one end of the first pipeline 61 is communicated with the solution mixing barrel 1, the other end of the first pipeline 61 is communicated with the internal circulation pipeline 41 and is positioned at the downstream of the third pump body 42, and the pressure relief valve 62 is arranged on the first pipeline 61. That is, the solution output mechanism 5 and the safety protection mechanism are both in communication with the internal circulation line 41 downstream of the third pump body 42. When the solution output mechanism 5 is normally or abnormally closed, the solution flows back into the solution mixing tank 1 from the first pipeline 61, preventing the third pump body 42 from being burnt out by an empty motor or the internal circulation pipeline 41 from bursting.

Optionally, the solution output mechanism 5 includes an output line 51, a first valve 52, and a third pressure reducing valve 53. The output pipeline 51 is communicated between the third pump body 42 and the solution demand end, the first valve 52 and the third pressure reducing valve 53 are both arranged on the output pipeline 51, and the third pressure reducing valve 53 is positioned upstream of the first valve 52. Specifically, the output pipe 51 communicates with the internal circulation pipe 41, and a communication point of the output pipe 51 and the internal circulation pipe 41 is located downstream of the third pump body 42. The outlet of the third pump body 42 is provided with a third pressure reducing valve 53 for stabilizing the outlet pressure and preventing the third pump body 42 from being burned due to the lack of formation when the output pipe 51 is empty.

More specifically, the second valve 43 is provided in the internal circulation line 41, and the second valve 43 is located downstream of the point of communication between the output line 51 and the internal circulation line 41 and the point of communication between the first line 61 and the internal circulation line 41.

After the solution is successfully pre-conditioned, the first valve 52 is opened, the second valve 43 is closed, the internal circulation mode of the third pump body 42 is finished, and the solution preparing and filling device enters a filling mode. At this time, the third pump body 42 pumps the solution in the solution mixing tank 1 to the system at the solution demand end through the output pipe 51. When the target demand is reached, the third pump body 42 is closed first, and then the first pump body 23 and the second pump body 33 are closed. Meanwhile, if the solution demand end needs to be replenished with the solution for the second time, the first pump body 23 and the second pump body 33 are opened, and then the third pump body 42 and the first valve 52 are opened, so that the second valve 43 is kept closed. At this time, the third pump body 42 is in the filling mode, so that the solution can be replenished to the system at the solution demand end.

It should be noted that, in the process of filling the solution, if it is observed that the stock solution in the first stock solution tank 21 or the second stock solution tank 31 is used up quickly, the stock solution can be manually replenished into the first stock solution tank 21 or the second stock solution tank 31, and at this time, the solution preparing and filling device can still operate normally and continuously. And the machine is not required to be stopped for replenishment, so that the time is saved.

Optionally, the solution preparing and filling device further comprises a liquid level detecting device 8. The liquid level detection device 8 is arranged in the solution mixing barrel 1 and is used for detecting the liquid level of the solution in the solution mixing barrel 1. The liquid level detection means 8 may be chosen as a liquid level sensor according to the prior art, for example. The high liquid level of the solution mixing barrel 1 is set as g, and the low liquid level is set as h. When the measured value i of the liquid level detection device 8 is more than or equal to the set value g, the first pump body 23 and the second pump body 33 are closed, so that waste caused by overflow of liquid in the solution mixing bucket 1 is prevented. When the measured value i of the liquid level detection device 8 is less than or equal to the set value g, the third pump body 42 is closed, and the motor is prevented from being burnt out due to idling of the third pump body 42.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Solution preparing and filling device, its characterized in that includes:

a solution mixing barrel (1);

the first stock solution conveying mechanism (2) comprises a first stock solution barrel (21), a first input pipeline (22), a first pump body (23) and a first flowmeter (24), wherein the first stock solution barrel (21) is communicated with the solution mixing barrel (1) through the first input pipeline (22), and the first pump body (23) and the first flowmeter (24) are sequentially arranged on the first input pipeline (22) and are positioned at the downstream of the first stock solution barrel (21);

the second stock solution conveying mechanism (3) comprises a second stock solution barrel (31), a second input pipeline (32), a second pump body (33) and a second flowmeter (34), wherein the second stock solution barrel (31) is communicated with the solution mixing barrel (1) through the second input pipeline (32), and the second pump body (33) and the second flowmeter (34) are sequentially arranged on the second input pipeline (32) and are positioned at the downstream of the second stock solution barrel (31);

the internal circulation mechanism (4) comprises an internal circulation pipeline (41) and a third pump body (42), wherein an inlet and an outlet of the internal circulation pipeline (41) are both communicated with the solution mixing barrel (1), the inlet of the internal circulation pipeline (41) is positioned at the bottom of the solution mixing barrel (1), and the third pump body (42) is arranged on the internal circulation pipeline (41);

and a solution output mechanism (5) communicated with the third pump body (42) and configured to convey the solution to the solution demand end.

2. The solution preparing and filling device according to claim 1, further comprising a solution mixing tube (11), wherein the outlet of the first input pipeline (22) and the outlet of the second input pipeline (32) are both communicated with the solution mixing tube (11), and the outlet of the solution mixing tube (11) is communicated with the solution mixing barrel (1).

3. The solution blending and filling device according to claim 1, characterized in that said first stock solution delivery mechanism (2) further comprises a first pressure reducing valve (25), said first pressure reducing valve (25) being arranged on said first input line (22), downstream of said first pump body (23);

the second stock solution conveying mechanism (3) further comprises a second pressure reducing valve (35), and the second pressure reducing valve (35) is arranged on the second input pipeline (32) and is positioned at the downstream of the second pump body (33).

4. A solution blending and filling device according to claim 3, characterized in that said first stock solution delivery mechanism (2) further comprises a first shut-off valve (26), said first shut-off valve (26) being arranged on said first input line (22), downstream of said first pressure-reducing valve (25);

the second stock solution conveying mechanism (3) further comprises a second stop valve (36), and the second stop valve (36) is arranged on the second input pipeline (32) and is positioned at the downstream of the second pressure reducing valve (35).

5. The solution blending and filling device according to claim 1, further comprising a safety protection mechanism, wherein the safety protection mechanism comprises a first pipeline (61) and a pressure release valve (62), one end of the first pipeline (61) is communicated with the solution mixing tank (1), the other end of the first pipeline is communicated with the internal circulation pipeline (41) and is positioned at the downstream of the third pump body (42), and the pressure release valve (62) is arranged on the first pipeline (61).

6. The solution preparing and filling device according to claim 5, characterized in that the solution output mechanism (5) comprises an output pipeline (51), a first valve (52) and a third pressure reducing valve (53), the output pipeline (51) is communicated between the third pump body (42) and the solution demand end, the first valve (52) and the third pressure reducing valve (53) are both arranged on the output pipeline (51), and the third pressure reducing valve (53) is located upstream of the first valve (52).

7. The solution preparing and filling device according to claim 6, characterized in that the output pipe (51) is in communication with the internal circulation pipe (41), and the point of communication of the output pipe (51) and the internal circulation pipe (41) is located downstream of the third pump body (42).

8. The solution preparing and filling device according to claim 7, characterized in that a second valve (43) is provided on the internal circulation line (41), the second valve (43) being located downstream of the point of communication of the output line (51) with the internal circulation line (41) and of the first line (61) with the internal circulation line (41).

9. The solution preparing and filling device according to any one of claims 1-8, further comprising a solution concentration detection device (7) configured to detect the concentration of a solution in the solution mixing tank (1).

10. The solution preparing and filling device according to any one of claims 1-8, further comprising a liquid level detection device (8) disposed in the solution mixing tank (1) for detecting a liquid level of the solution in the solution mixing tank (1).