Liquid filling device and method

Abstract

The present disclosure relates to a liquid filling device and method, which comprises a multi-way valve, at least including a feed inlet, an air inlet, a discharge outlet and a mixing cavity arranged inside the multi-way valve, the discharge outlet being in communication with the mixing cavity, the feed inlet and the air inlet being in communication with the mixing cavity in a disconnectable manner; a feed mechanism including a feed pipeline in communication with the feed inlet; an air source mechanism including an air inlet pipeline in communication with the air inlet; an exhaust mechanism in communication with the discharge outlet and having an open state and a closed state; and a spraying mechanism in communication with the discharge outlet and used for filling liquid into a reactor. According to the above technical solution, the liquid can be premixed, and the premixed liquid is all used for filling without waste; no liquid is left in the multi-way valve after filling, which will not cause pollution to the next filling; the added liquid can be accurately quantified, avoiding the inaccuracy of filling amount caused by dead volume; and the structure is compact and the operation is simple.

Description

Technical Field

[0001] This disclosure relates to the field of chemical experimental equipment technology, specifically to a liquid dispensing device and method. Background Technology

[0002] In engine simulation experiments, the amount of fuel injected is generally adjusted by the pulse width, pressure, and number of injections of the fuel injector. When different types of fuel need to be mixed on-site, the fuel is usually pre-mixed and placed in a fuel tank, and then injected into the reactor by the fuel injector; or the component fuels are injected into the reactor sequentially by the fuel injector.

[0003] The above method has the following drawbacks: First, when pre-blending the fuel, the amount of blended fuel must be greater than the actual amount used, resulting in waste; second, the quantitative effect of the fuel injection is not good, and it cannot meet the needs of occasions that require precise control of the air-fuel ratio; third, fuel residue will remain in the fuel system, which will cause contamination for the next fuel injection, requiring disassembly and cleaning, increasing the difficulty of operation.

[0004] When different oil components are injected sequentially, metering becomes even more difficult. To address contamination, pre-injection can be used to replace residues in the nozzles and oil lines, but there is generally no injection bypass. After pre-injection, the reactor still needs cleaning and gas replacement, increasing the operational complexity. Moreover, pre-injection does not eliminate dead volume in the pipeline, so the problem of inaccurate metering persists. Summary of the Invention

[0005] The purpose of this disclosure is to provide a liquid filling device and method that can realize liquid premixing, so that the premixed liquid can be used entirely for filling, avoiding waste; at the same time, after filling, the residual liquid in the mixing chamber can be purged by the air source mechanism to avoid the residual liquid in the mixing chamber from contaminating the liquid for the next filling, and at the same time, it can avoid the inaccurate filling volume caused by residual liquid, thereby solving at least some of the above-mentioned problems.

[0006] To achieve the above objectives, in a first aspect, this disclosure provides a liquid dispensing device, the liquid dispensing device comprising:

[0007] A multi-way valve includes at least a feed inlet, an air inlet, a discharge outlet, and a mixing chamber disposed inside the multi-way valve. The discharge outlet is connected to the mixing chamber, and both the feed inlet and the air inlet are disconnectably connected to the mixing chamber.

[0008] A feeding mechanism includes a feeding pipe connected to the feeding port;

[0009] The air supply mechanism includes an air intake pipe, which is connected to the air inlet;

[0010] The exhaust mechanism, connected to the discharge port, has an open state and a closed state; and

[0011] a spraying mechanism, in communication with the outlet, for adding liquid into the reactor.

[0012] Optionally, the multi-way valve further comprises a return material port and a return gas port; the material inlet port is switchably communicated with the return material port and the mixing chamber; the gas inlet port is switchably communicated with the return gas port and the mixing chamber.

[0013] The material feeding mechanism further comprises a return material pipeline, which is in communication with the return material port.

[0014] The gas source mechanism further comprises a return gas pipeline, which is in communication with the return gas port.

[0015] Optionally, the number of the material inlet ports and the number of the material feeding mechanisms are both plural and one-to-one corresponding.

[0016] Optionally, the material feeding mechanism further comprises a material storage tank and a material feeding pump.

[0017] The end of the material pipeline away from the material inlet port is connected with the material storage tank, and the material feeding pump is provided on the material pipeline; the end of the return material pipeline away from the return material port is in communication with the material storage tank.

[0018] Optionally, the material feeding pump is a metering pump; or, a flow meter is provided on the material pipeline.

[0019] Optionally, the spraying mechanism comprises a storage tank and a nozzle.

[0020] The storage tank is in communication with the outlet and the nozzle respectively, and the nozzle is used for adding liquid in the storage tank into the reactor.

[0021] Optionally, the storage tank is a transparent structure or a transparent observation window is provided on the storage tank.

[0022] Optionally, the exhaust mechanism comprises an exhaust pipeline in communication with the outlet and an exhaust valve provided on the exhaust pipeline.

[0023] Optionally, the gas inlet pipeline is provided with a first pressure gauge and / or the exhaust pipeline is provided with a second pressure gauge.

[0024] In a second aspect, the present disclosure provides a liquid adding method, comprising providing the liquid adding device according to the first aspect of the present disclosure, and the liquid adding method comprises:

[0025] purging step: disconnecting the feed port from the mixing chamber, connecting the gas inlet port with the mixing chamber, switching the exhaust mechanism to the open state, under the first pressure, the gas in the gas source mechanism is discharged through the gas inlet pipeline, the gas inlet port, the mixing chamber and the discharge port by the exhaust mechanism, and the residual liquid in the mixing chamber is purged by the gas;

[0026] pre-mixing step: disconnecting the gas inlet port from the mixing chamber, connecting the feed port with the mixing chamber, switching the exhaust mechanism to the closed state, the liquid in the feed mechanism enters the mixing chamber through the feed pipeline and the feed port, and then enters the injection mechanism for storage after mixing in the mixing chamber and passing through the discharge port;

[0027] filling step: disconnecting the feed port from the mixing chamber, connecting the gas inlet port with the mixing chamber, switching the exhaust mechanism to the closed state, under the second pressure, the gas in the gas source mechanism pushes the liquid in the injection mechanism into the reactor after passing through the gas inlet pipeline, the gas inlet port, the mixing chamber and the discharge port.

[0028] By the above technical solution, i.e. the liquid filling device provided by the present disclosure, when in use, first, the feed port is disconnected from the mixing chamber, and the gas inlet port is connected with the mixing chamber, the exhaust mechanism is switched to the open state, the gas source mechanism is started under the first pressure, the gas in the gas source mechanism is discharged through the gas inlet pipeline, the gas inlet port, the mixing chamber and the discharge port by the exhaust mechanism, and the residual liquid in the mixing chamber is purged by the gas; secondly, the gas inlet port is disconnected from the mixing chamber, and the feed port is connected with the mixing chamber, the exhaust mechanism is switched to the closed state, the feed mechanism is started, so that the liquid in the feed mechanism enters the mixing chamber through the feed pipeline and the feed port, and then enters the injection mechanism for storage after mixing in the mixing chamber and passing through the discharge port; finally, the feed port is disconnected from the mixing chamber, and the gas inlet port is connected with the mixing chamber, the exhaust mechanism is switched to the closed state, the gas source mechanism is started under the second pressure, the gas in the gas source mechanism pushes the liquid in the injection mechanism into the reactor after passing through the gas inlet pipeline, the gas inlet port, the mixing chamber and the discharge port. The feed mechanism is responsible for realizing the quantitative addition of liquid, avoiding waste; the gas source mechanism and the exhaust mechanism are used for purging the residual liquid in the mixing chamber, avoiding secondary pollution; at the same time, the gas source mechanism is also used for filling the liquid in the injection mechanism, realizing quantitative and accurate filling.

[0029] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments section. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0031] Figure 1This is a schematic diagram of the structure of a liquid dispensing device provided in some exemplary embodiments of this disclosure;

[0032] Figure 2 This is a schematic diagram of the structure of a multi-way valve of a liquid dispensing device provided in some exemplary embodiments of this disclosure;

[0033] Figure 3 This is a schematic diagram of the purging and filling steps of the multi-way valve of the liquid filling device provided in some exemplary embodiments of this disclosure;

[0034] Figure 4 This is a connection diagram of the premixing step of the multi-way valve of the liquid dispensing apparatus provided in some exemplary embodiments of this disclosure;

[0035] Figure 5 This is a schematic diagram showing the connection between a feeding mechanism and a multi-way valve of a liquid dispensing device provided in some exemplary embodiments of this disclosure;

[0036] Figure 6 This is a flowchart of a liquid filling method provided by some exemplary embodiments of this disclosure.

[0037] Explanation of reference numerals in the attached figures

[0038] 100 - Multi-way valve; 110 - Mixing chamber; 121 - Feed inlet; 122 - Return inlet; 131 - Air inlet; 132 - Air return inlet; 140 - Discharge outlet; 210 - Storage tank; 220 - Feed pump; 230 - Flow meter; 240 - Feed pipeline; 250 - Return pipeline; 310 - Air storage tank; 320 - Air inlet pipeline; 330 - Air return pipeline; 340 - First pressure gauge; 410 - Exhaust pipeline; 420 - Exhaust valve; 430 - Second pressure gauge; 510 - Storage tank; 520 - Nozzle. Detailed Implementation

[0039] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0040] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" are generally defined based on the drawing orientation of the corresponding figure; "inner" and "outer" refer to the inner and outer contours of the corresponding component; "far" and "near" refer to the corresponding structure or component being far from or near another structure or component; in addition, it should be noted that terms such as "first" and "second" are used to distinguish one element from another.

[0041] like Figures 1 to 5As shown, in a first aspect, this disclosure provides a liquid dispensing device, which includes: a multi-way valve 100, including at least an inlet 121, an air inlet 131, an outlet 140, and a mixing chamber 110 disposed inside the multi-way valve 100, the outlet 140 being connected to the mixing chamber 110, and the inlet 121 and the air inlet 131 being disconnectably connected to the mixing chamber 110; a feeding mechanism, including a feeding pipe 240 connected to the inlet 121; an air source mechanism, including an air inlet pipe 320 connected to the air inlet 131; an exhaust mechanism connected to the outlet 140, having an open state and a closed state; and a spraying mechanism connected to the outlet 140 for dispensing liquid into a reactor.

[0042] With the above technical solution, namely the liquid filling device provided in this disclosure, during use, firstly, the feed inlet 121 is disconnected from the mixing chamber 110, and the air inlet 131 is connected to the mixing chamber 110. The exhaust mechanism is switched to the open state, and the air source mechanism is started under the first pressure. The gas in the air source mechanism is discharged through the air inlet pipe 320, the air inlet 131, the mixing chamber 110, and the discharge port 140, and the gas is used to purge the residual liquid in the mixing chamber 110. Secondly, the air inlet 131 is disconnected from the mixing chamber 110, and the feed inlet 121 is connected to the mixing chamber 110. Switch the exhaust mechanism to the off state, start the feeding mechanism, so that the liquid in the feeding mechanism enters the mixing chamber 110 through the feeding pipe 240 and the feeding port 121 for mixing, and then enters the injection mechanism for storage through the discharge port 140. Finally, disconnect the feeding port 121 from the mixing chamber 110, connect the air inlet 131 to the mixing chamber 110, switch the exhaust mechanism to the off state, and start the gas source mechanism under the second pressure. The gas in the gas source mechanism drives the liquid in the injection mechanism into the reactor through the air inlet pipe 320, the air inlet 131, the mixing chamber 110, and the discharge port 140. The feeding mechanism is responsible for quantitatively adding liquid to avoid waste; the gas source mechanism and the exhaust mechanism are used to purge the residual liquid in the mixing chamber 110 to avoid secondary pollution; at the same time, the gas source mechanism is also used to add liquid to the injection mechanism to achieve precise quantitative addition.

[0043] The operation of the liquid dispensing device disclosed herein includes the following steps:

[0044] Purging steps: Disconnect the feed port 121 from the mixing chamber 110, connect the air inlet 131 to the mixing chamber 110, switch the exhaust mechanism to the open state, and under the first pressure, the gas in the air source mechanism is discharged through the air inlet pipe 320, air inlet 131, mixing chamber 110, and discharge port 140 by the exhaust mechanism, and the gas is used to purge the residual liquid in the mixing chamber 110.

[0045] Premixing step: Disconnect the air inlet 131 from the mixing chamber 110, connect the feed inlet 121 to the mixing chamber 110, switch the exhaust mechanism to the closed state, and the liquid in the feed mechanism enters the mixing chamber 110 through the feed pipe 240 and the feed inlet 121 for mixing, and then enters the spraying mechanism for storage through the discharge port 140.

[0046] Addition steps: Disconnect the feed port 121 from the mixing chamber 110, connect the air inlet 131 to the mixing chamber 110, switch the exhaust mechanism to the closed state, and under the second pressure, the gas in the gas source mechanism pushes the liquid in the injection mechanism into the reactor through the air inlet pipe 320, air inlet 131, mixing chamber 110, and discharge port 140.

[0047] To facilitate liquid reflux in the feeding mechanism and gas reflux in the air intake mechanism, such as Figure 1 and Figure 2 As shown, in some embodiments of this disclosure, the multi-way valve 100 further includes a return port 122 and a return air port 132; the feed port 121 is switchably connected to the return port 122 and the mixing chamber 110; the air inlet 131 is switchably connected to the return air port 132 and the mixing chamber 110; the feeding mechanism further includes a return pipe 250, which is connected to the return port 122; the air source mechanism further includes a return air pipe 330, which is connected to the return air port 132.

[0048] When it is necessary to remove residual liquid from the mixing chamber 110, the feed inlet 121 is switched to be disconnected from the mixing chamber 110 and connected to the return inlet 122. At this time, the liquid from the feeding mechanism flows back to the feeding mechanism after passing through the feed pipe 240, feed inlet 121, return inlet 122 and return pipe 250. At the same time, the air inlet 131 is switched to be connected to the mixing chamber 110 and disconnected from the return air inlet 132. The exhaust mechanism is opened, and the gas in the air source mechanism enters the mixing chamber 110 of the multi-way valve 100 under the first pressure after passing through the air inlet pipe 320 and air inlet 131 to purge the residual liquid and then is discharged by the exhaust mechanism.

[0049] When it is necessary to send the liquid in the feeding mechanism into the mixing chamber 110 of the multi-way valve 100, the air inlet 131 is switched to be disconnected from the mixing chamber 110 and connected to the return air inlet 132. At this time, the gas in the feeding mechanism flows back to the feeding mechanism through the air inlet pipe 320, air inlet 131, return air inlet 132 and return air pipe 330. At the same time, the feed inlet 121 is switched to be connected to the mixing chamber 110 and disconnected from the return air inlet 122. The exhaust mechanism is closed. The liquid in the feeding mechanism enters the mixing chamber 110 through the feed pipe 240 and feed inlet 121, mixes, and then enters the injection mechanism.

[0050] When it is necessary to inject liquid from the injection mechanism into the reactor, the feed port 121 is switched to be disconnected from the mixing chamber 110 and connected to the return port 122. At this time, the liquid from the feed mechanism flows back to the feed mechanism after passing through the feed pipe 240, feed port 121, return port 122 and return pipe 250. At the same time, the air inlet 131 is switched to be connected to the mixing chamber 110 and disconnected from the air return port 132. The exhaust mechanism is closed and the injection mechanism is opened. The gas in the gas source mechanism enters the injection mechanism under the second pressure after passing through the air inlet pipe 320, air inlet 131 and the mixing chamber 110 of the multi-way valve 100, pushing the liquid inside to be injected into the reactor.

[0051] To facilitate the mixing of different liquids into the mixing chamber 110 of the multi-way valve 100, there are multiple feed inlets 121 and multiple feed mechanisms, and they correspond one-to-one.

[0052] like Figure 1 As shown, in an exemplary embodiment, there are three inlet ports 121 and three return ports 122, and the number of feeding mechanisms is also three. Each feeding mechanism corresponds to one inlet port 121 and one return port 122. The feeding mechanism includes an inlet pipe 240 and a return pipe 250. The inlet pipe 240 is connected to the inlet port 121, and the return pipe 250 is connected to the return port 122. With the arrangement of three feeding mechanisms, liquid can be added to the mixing chamber 110 of the multi-way valve 100 at the same time, and mixing can be carried out in the mixing chamber 110.

[0053] When the three component oils need to be added to the reactor in a certain ratio, the three feeding mechanisms are connected to the three inlets 121 and three return ports 122 of the multi-way valve 100, respectively, and the air source mechanism is connected to the air inlet 131 and the air filling port of the multi-way valve 100. First, the inlet 121 of the multi-way valve 100 is connected to the mixing chamber 110, and the exhaust mechanism is opened to purge the mixing chamber 110 using the air source mechanism. Then, the exhaust mechanism is closed, and the inlets 121 of the three feeding mechanisms are connected to the mixing chamber 110, the feeding mechanism is started, and the three component oils are added to the mixing chamber 110 according to the calculated ratio. The mixed liquid flows into the storage tank 510 through the outlet 140. After the above steps are completed, the air source mechanism is connected to the air inlet 131 and the air filling port of the multi-way valve 100. After adjusting the air source mechanism to stabilize it at a certain pressure, the injection mechanism is opened to inject all the liquid in the storage tank 510 into the reactor. The injection mechanism begins by injecting liquid, then a gas-liquid mixture, and finally gas, ensuring that a certain amount of gas is injected to guarantee that all the liquid is injected. This process also pressurizes the reactor.

[0054] The feeding mechanism can be constructed in any manner. In some embodiments of this disclosure, the feeding mechanism may include a storage tank 210 and a feeding pump 220; the end of the feeding pipeline 240 away from the inlet 121 is connected to the storage tank 210, and the feeding pump 220 is provided on the feeding pipeline 240; the end of the return pipeline 250 away from the return port 122 is connected to the storage tank 210. That is, the feeding mechanism includes a storage tank 210, a feeding pump 220, a feeding pipeline 240, and a return pipeline 250, wherein one end of the feeding pipeline 240 is connected to the storage tank 210, and the other end is connected to the inlet 121, and the feeding pump 220 is provided on the feeding pipeline 240 between the inlet 121 and the storage tank 210; one end of the return pipeline 250 is connected to the storage tank 210, and the other end is connected to the return port 122.

[0055] In order to facilitate the measurement of the amount of liquid entering the mixing chamber 110 through the feed inlet 121, in some embodiments, the feed pump 220 is configured as a metering pump. The metering pump has a quantitative function. When the feed inlet 121 is connected to the mixing chamber 110, the metering pump can count the amount of liquid flowing through the metering pump, thereby accurately quantifying the liquid entering the mixing chamber 110.

[0056] Similarly, in order to accurately obtain the amount of liquid entering the mixing chamber 110 through the feed inlet 121, in some embodiments of this disclosure, a flow meter 230 can also be provided on the feed pipeline 240. The flow meter 230 can detect the amount of liquid flowing through it. The flow meter 230 can be defined to start metering when the feed inlet 121 is connected to the mixing chamber 110 and to stop metering when the feed inlet 121 is disconnected from the mixing chamber 110, so as to accurately obtain the amount of liquid entering the mixing chamber 110.

[0057] Of course, in other embodiments of this disclosure, the feeding mechanism may also include a storage tank, a feed pump 220, and a weighing scale (e.g., a balance), wherein the storage tank is provided with a weighing scale, and the amount of liquid entering through the feed inlet 121 is obtained by the change in the weighing scale.

[0058] Those skilled in the art can construct different feeding mechanisms according to different control precisions, but it should be noted that the feeding mechanism can meet the conditions for quantitative liquid.

[0059] The injection mechanism can be constructed in any way, such as Figure 1As shown, in some specific embodiments disclosed, the injection mechanism specifically includes a storage tank 510 and a nozzle 520. The storage tank 510 is connected to both the discharge port 140 and the nozzle 520. The nozzle 520 is used to add liquid from the storage tank 510 into the reactor. One end of the storage tank 510 is connected to the discharge port 140, and the nozzle 520 is located at the other end of the storage tank 510. The nozzle 520 has an open state and a closed state, and can switch between the two states. When performing a purging step or a premixing step, the nozzle 520 is in a semi-closed state; when liquid needs to be added to the reactor, the nozzle 520 switches to the open state.

[0060] To facilitate observation of the liquid level within the storage tank 510, in some embodiments, the storage tank 510 can be constructed as a transparent structure, meaning it can be made of a transparent material, allowing staff to directly observe the liquid level. Alternatively, in other embodiments, a transparent observation window can be provided on the storage tank 510, enabling observation of the liquid level as well.

[0061] The exhaust system can be constructed in any way as needed, such as Figure 1 As shown, in some embodiments, the exhaust mechanism includes an exhaust pipe 410 communicating with the discharge port 140 and an exhaust valve 420 disposed on the exhaust pipe 410. One end of the exhaust pipe 410 is connected to the discharge port, and the other end can be connected to the waste gas treatment system. The exhaust pipe 410 is provided with an exhaust valve 420 for opening or closing the exhaust pipe 410.

[0062] In some embodiments, the pressurized gas source includes a gas storage tank 310, an inlet pipe 320, and a return pipe 330. The inlet pipe 320 connects the gas storage tank 310 to the inlet port 131 of the multi-way valve 100, and the return pipe 330 connects the gas storage tank 310 to the return port 132. The purging and filling steps are achieved by using pressurized gas in the gas storage tank 310. It should be noted that the pressurized gas source can also be an air pump, used to provide pressurized gas and force it into the inlet pipe 320. The return pipe 330 can be directly connected to the atmosphere. The pressurized gas source includes, but is not limited to, the embodiments described above; other sources in the related art capable of providing pressurized gas for purging can also be used.

[0063] The pressure required for the purging and filling processes may differ. Therefore, to facilitate rapid detection of the pressure value in the air intake line 320 of the air source mechanism during both processes, such as... Figure 1 As shown, in some specific embodiments of this disclosure, a first pressure gauge 340 is provided on the intake pipe 320 to detect the gas pressure in the intake pipe 320. Additionally, a second pressure gauge 430 may be provided on the exhaust pipe 410 to detect the exhaust pressure.

[0064] like Figure 6 As shown, a second aspect of this disclosure provides a liquid dispensing method, including providing a liquid dispensing apparatus according to a first aspect of this disclosure, the liquid dispensing method comprising the following steps.

[0065] S602, Purging Step: Disconnect the feed inlet from the mixing chamber, connect the air inlet from the mixing chamber, switch the exhaust mechanism to the open state, and under the first pressure, the gas in the air source mechanism is discharged through the air inlet pipe, air inlet, mixing chamber, and discharge outlet by the exhaust mechanism, using the gas to purge the residual liquid in the mixing chamber.

[0066] S604, Premixing step: Disconnect the air inlet from the mixing chamber, connect the feed inlet from the mixing chamber, switch the exhaust mechanism to the closed state, and the liquid in the feed mechanism enters the mixing chamber through the feed pipe and feed inlet for mixing, and then enters the spray mechanism for storage through the discharge port.

[0067] S606, filling procedure: disconnect the feed port from the mixing chamber, connect the air inlet from the mixing chamber, switch the exhaust mechanism to the closed state, and under the second pressure, the gas in the gas source mechanism pushes the liquid in the injection mechanism into the reactor through the air inlet pipe, air inlet, mixing chamber, and discharge port.

[0068] In summary, the liquid filling device and method provided in this disclosure can serve small-scale chemical experimental equipment, realize liquid premixing in multiple feed lines 240, and use all premixed liquid for filling without waste; there is no liquid residue in the multi-way valve 100 after filling, which will not cause contamination for the next filling; the added liquid can be accurately quantified, avoiding inaccurate filling volume caused by dead volume; and the liquid filling device has a compact structure and is easy to operate.

[0069] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0070] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0071] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A liquid dispensing device, characterized in that, The liquid dispensing device includes: A multi-way valve (100) includes at least a feed inlet (121), an air inlet (131), a discharge outlet (140), and a mixing chamber (110) disposed inside the multi-way valve (100). The discharge outlet (140) is connected to the mixing chamber (110), and both the feed inlet (121) and the air inlet (131) are disconnected from the mixing chamber (110). The feeding mechanism includes a feeding pipe (240) connected to the feeding port (121); The air source mechanism includes an air intake pipe (320) connected to the air intake port (131); The exhaust mechanism, connected to the discharge port (140), has an open state and a closed state; and The injection mechanism, connected to the discharge port (140), is used to inject liquid into the reactor; The multi-way valve (100) further includes a return port (122) and a return air port (132); the feed port (121) is switchably connected to the return port (122) and the mixing chamber (110); the air inlet (131) is switchably connected to the return air port (132) and the mixing chamber (110). The feeding mechanism also includes a return pipe (250), which is connected to the return port (122); The gas source mechanism also includes a return gas pipeline (330), which is connected to the return gas port (132).

2. The liquid dispensing device according to claim 1, characterized in that, The number of the feed inlets (121) and the feeding mechanisms are both multiple and correspond one-to-one.

3. The liquid dispensing device according to claim 1, characterized in that, The feeding mechanism also includes a storage tank (210) and a feeding pump (220). The end of the feed pipe (240) away from the feed port (121) is connected to the storage tank (210), and the feed pump (220) is installed on the feed pipe (240); the end of the return pipe (250) away from the return port (122) is connected to the storage tank (210).

4. The liquid dispensing device according to claim 3, characterized in that, The feed pump (220) is a metering pump; or, the feed pipeline (240) is equipped with a flow meter (230).

5. The liquid dispensing device according to claim 1, characterized in that, The spraying mechanism includes a storage tank (510) and a nozzle (520). The storage tank (510) is connected to the discharge port (140) and the nozzle (520) respectively. The nozzle (520) is used to inject the liquid in the storage tank (510) into the reactor.

6. The liquid dispensing device according to claim 5, characterized in that, The storage tank (510) is a transparent structure or the storage tank (510) is provided with a transparent observation window.

7. The liquid dispensing device according to claim 1, characterized in that, The exhaust mechanism includes an exhaust pipe (410) connected to the discharge port (140) and an exhaust valve (420) disposed on the exhaust pipe (410).

8. The liquid dispensing device according to claim 7, characterized in that, The intake pipe (320) is equipped with a first pressure gauge (340) and / or the exhaust pipe (410) is equipped with a second pressure gauge (430).

9. A method for adding liquid, characterized in that, Includes providing a liquid dispensing device according to any one of claims 1-8, wherein the liquid dispensing method includes: Purging steps: Disconnect the feed port (121) from the mixing chamber (110), connect the air inlet (131) to the mixing chamber (110), switch the exhaust mechanism to the open state, and under the first pressure, the gas in the air source mechanism is discharged through the air inlet pipe (320), air inlet (131), mixing chamber (110), and discharge port (140) by the exhaust mechanism, and the gas is used to purge the residual liquid in the mixing chamber (110); Premixing step: disconnect the air inlet (131) from the mixing chamber (110), connect the feed inlet (121) to the mixing chamber (110), switch the exhaust mechanism to the closed state, and the liquid in the feed mechanism enters the mixing chamber (110) through the feed pipe (240) and feed inlet (121) for mixing, and then enters the spraying mechanism for storage through the discharge port (140); Addition steps: Disconnect the feed port (121) from the mixing chamber (110), connect the air inlet (131) to the mixing chamber (110), switch the exhaust mechanism to the closed state, and under the second pressure, the gas in the gas source mechanism pushes the liquid in the injection mechanism into the reactor through the air inlet pipe (320), air inlet (131), mixing chamber (110), and discharge port (140).

Images