Liquid distributor without flow measurement

Abstract

The utility model relates to the technical field of automatic liquid distribution, in particular to a liquid distributor without flow measurement. The dosage of the liquid is metered in a weighing manner, so that the accuracy of extracting the liquid can be effectively improved; due to real-time monitoring of the weighing sensor, the actual extraction amount can be fed back; liquid is pumped in the mode that the vacuum pump conducts negative pressure pumping on the closed metering cylinder, corrosive liquid can be pumped, the corrosive liquid does not make direct contact with the vacuum pump, and the service cycle of the vacuum pump is prevented from being affected. Liquid in the closed container is pressed out through compressed air, the traditional mode that the liquid is pumped out through a pump is abandoned, direct contact between the liquid and the pump is avoided, and a high-cost corrosion-resistant pump does not need to be adopted.

Description

Technical Field

[0001] This utility model relates to the field of automatic liquid dispensing technology, and more specifically, to a liquid dispenser that does not require flow measurement. Background Technology

[0002] Currently, liquid dispensers on the market come in various types based on their pumping and metering principles, including peristaltic pumps, pneumatic diaphragm pumps, mechanical diaphragm pumps, and Venturi pumps. However, they all share a common drawback: they require metering calibration. Furthermore, the metering accuracy changes with the viscosity of the liquid, necessitating calibration. Moreover, the calibration process is cumbersome and difficult to operate. Most importantly, none of them provide feedback on the final feed rate. The actual feed rate is easily affected by factors such as external pipelines, liquid viscosity, and water pressure, resulting in the actual feed rate being merely a theoretical figure. Utility Model Content

[0003] This invention addresses the problem that existing liquid dispensers lack feedback on the final feed rate, resulting in the actual feed rate being merely a theoretical figure. It proposes a liquid dispenser that eliminates the need for flow rate measurement. By employing a weighing method to measure the liquid dosage, the accuracy of liquid extraction is effectively improved. Real-time monitoring by the weighing sensor provides feedback on the actual extraction volume. Liquid is extracted by using a vacuum pump to create negative pressure in a sealed measuring cylinder, enabling the extraction of corrosive liquids without direct contact between the corrosive liquid and the vacuum pump, thus avoiding impact on its lifespan. Finally, compressed air is used to force the liquid out of the sealed container, abandoning the traditional method of using a pump to extract liquid, avoiding direct contact between the liquid and the pump, and eliminating the need for a high-cost, corrosion-resistant pump.

[0004] The specific implementation details of this utility model are as follows:

[0005] A liquid dispenser that does not require flow measurement includes a metering cylinder, an MCU module, a weighing sensor, a vacuum valve, a compressed air valve, and a pressure relief valve;

[0006] The input end of the vacuum valve is connected to the vacuum machine, and the output end of the vacuum valve is connected to the first input interface of the measuring cylinder;

[0007] The input end of the compressed air valve is connected to the air compressor, and the output end of the compressed air valve is connected to the second input interface of the metering cylinder;

[0008] The pressure relief valve is connected to the first output interface of the metering cylinder;

[0009] The input terminal of the weighing sensor is connected to the second output interface of the measuring cylinder, and the output terminal of the weighing sensor is connected to the input terminal of the MCU module.

[0010] The vacuum valve is used to change the air pressure inside the measuring cylinder to negative pressure, and to extract corrosive liquids by drawing negative pressure.

[0011] The compressed air valve is used to change the air pressure inside the metering cylinder to positive pressure, thereby forcing the corrosive liquid out of the metering cylinder.

[0012] The pressure relief valve is used to automatically release the air pressure inside the metering cylinder;

[0013] The weighing sensor is used to convert the real-time weight data obtained from the measuring cylinder into an electrical signal and transmit it to the MCU module.

[0014] To better realize this utility model, the liquid distributor that does not require flow measurement further includes an inlet valve, an outlet valve, and a dispensing valve;

[0015] The input end of the feed valve is connected to the output end of the feed hopper, and the output end of the feed valve is connected to the third input interface of the metering cylinder.

[0016] The input end of the discharge valve is connected to the third output interface of the metering cylinder, and the output end of the discharge valve is connected to the first input end of the dispensing valve.

[0017] The output end of the dispensing valve is connected to the washing machine via a feeding pipe.

[0018] To better realize this utility model, the liquid distributor that does not require flow measurement further includes an inlet valve;

[0019] The water inlet valve receives water from its input end, and its output end is connected to the fourth input interface of the metering cylinder.

[0020] To better realize this utility model, the liquid distributor that does not require flow measurement further includes an air-filling valve;

[0021] The input end of the air-filling valve is connected to the air compressor, and the output end of the air-filling valve is connected to the second input end of the material distribution valve.

[0022] To better realize this utility model, the liquid distributor that does not require flow measurement further includes a flushing valve;

[0023] The input end of the flushing valve is connected to the water pump, and the output end of the flushing valve is connected to the third input end of the dispensing valve.

[0024] To better realize this utility model, the weighing sensor is further disposed at the bottom of the measuring cylinder.

[0025] This utility model has the following beneficial effects:

[0026] (1) This utility model improves the accuracy of liquid extraction by setting up a weighing sensor and using weighing to measure the dosage of liquid. The actual extraction amount is fed back through real-time monitoring of the weighing sensor.

[0027] (2) This utility model extracts liquid by setting a vacuum valve to draw negative pressure on a sealed measuring cylinder. It can extract corrosive liquids, and the corrosive liquids do not come into direct contact with the vacuum valve, thus avoiding affecting the service life of the vacuum valve.

[0028] (3) This utility model uses compressed air to press out the liquid in the sealed container, abandoning the traditional method of using a pump to extract the liquid. It also avoids direct contact between the liquid and the pump, eliminating the need for a high-cost corrosion-resistant pump and reducing measurement costs. Attached Figure Description

[0029] Figure 1 A schematic block diagram of the overall structure of the liquid distributor that does not require flow measurement provided by this utility model.

[0030] Figure 2 A schematic diagram of the structure of the one-to-ten liquid distributor provided by this utility model.

[0031] Figure 3 A simplified structural diagram of a single-unit measuring cylinder provided by this utility model.

[0032] Among them, 1. Metering cylinder sealing cover, 2. Metering cylinder, 3. Weighing sensor, 4. Weighing sensor bracket, 5. Discharge valve, 6. Feed valve, 7. Water inlet valve, 8. Vacuum valve, 9. Compressed air valve, 10. Distributor valve, 11. Bracket, 12. Precision pressure regulating valve, 13. Metering cylinder discharge port. Detailed Implementation

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of this utility model, not all embodiments, and therefore should not be regarded as a limitation on the scope of protection. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example 1:

[0036] This embodiment proposes a liquid dispenser that does not require flow measurement, such as... Figure 1 As shown, it includes a measuring cylinder 2, an MCU module, a weighing sensor 3, a vacuum valve 8, a compressed air valve 9, and a pressure relief valve;

[0037] The input end of the vacuum valve 8 is connected to the vacuum machine, and the output end of the vacuum valve 8 is connected to the first input interface of the measuring cylinder 2.

[0038] The input end of the compressed air valve 9 is connected to the air compressor, and the output end of the compressed air valve 9 is connected to the second input interface of the metering cylinder 2.

[0039] The pressure relief valve is connected to the first output interface of the metering cylinder 2;

[0040] The input end of the weighing sensor 3 is connected to the second output interface of the measuring cylinder 2, and the output end of the weighing sensor 3 is connected to the input end of the MCU module.

[0041] The vacuum valve 8 is used to change the air pressure in the metering cylinder 2 to a negative pressure, and to extract corrosive liquid by drawing negative pressure.

[0042] The compressed air valve 9 is used to change the air pressure in the metering cylinder 2 to positive pressure, so as to force the corrosive liquid out of the metering cylinder 2;

[0043] The pressure relief valve is used to automatically release the air pressure inside the metering cylinder 2;

[0044] The weighing sensor 3 is used to convert the real-time weight data obtained from the measuring cylinder 2 into an electrical signal and transmit it to the MCU module.

[0045] The liquid distributor that does not require flow measurement also includes an inlet valve 6, an outlet valve 5, and a distribution valve 10;

[0046] The input end of the feed valve 6 is connected to the output end of the feed hopper, and the output end of the feed valve 6 is connected to the third input interface of the metering cylinder 2.

[0047] The input end of the discharge valve 5 is connected to the third output interface of the metering cylinder 2, and the output end of the discharge valve 5 is connected to the first input end of the distributing valve 10.

[0048] The output end of the dispensing valve 10 is connected to the washing machine through a conveying pipe.

[0049] Furthermore, the liquid distributor that does not require flow measurement also includes an inlet valve 7;

[0050] The water inlet valve 7 is connected to the input end of the water source, and the output end of the water inlet valve 7 is connected to the fourth input interface of the metering cylinder 2.

[0051] Furthermore, the liquid dispenser that does not require flow measurement also includes an air-filling valve;

[0052] The input end of the air-filling valve is connected to the air compressor, and the output end of the air-filling valve is connected to the second input end of the material distribution valve 10.

[0053] Furthermore, the liquid distributor that does not require flow measurement also includes a flushing valve;

[0054] The input end of the flushing valve is connected to the water pump, and the output end of the flushing valve is connected to the third input end of the dispensing valve 10.

[0055] Working principle: This embodiment uses weighing to measure the liquid dosage, which can effectively improve the accuracy of liquid extraction. Due to the real-time monitoring of the weighing sensor 3, the actual extraction volume can be fed back. The liquid is extracted by drawing negative pressure on the sealed measuring cylinder 2 using a vacuum pump, which can extract corrosive liquids. The corrosive liquid does not come into direct contact with the vacuum pump, thus avoiding affecting the service life of the vacuum pump. Compressed air is used to "push" the liquid out of the sealed container, abandoning the traditional mode of using a pump to extract liquid. This also avoids direct contact between the liquid and the pump, so there is no need to use a high-cost corrosion-resistant pump.

[0056] like Figure 1 The diagram shown is a simplified diagram of a single metering cylinder 2. This diagram only illustrates the method for taking and feeding materials from a single metering cylinder, which can be extended to a mode with multiple metering cylinders 2.

[0057] First, a brief explanation of its key components:

[0058] The vacuum machine has its own gas storage tank and an automatic start-stop function (it automatically stops when the maximum vacuum level is reached and automatically starts when the vacuum level drops below the minimum vacuum level), ensuring that the gas storage tank is always at the set negative pressure. When the vacuum valve 8 is opened, the vacuum pump is connected to the measuring cylinder 2, quickly changing the gas pressure in the measuring cylinder 2 to negative pressure as well. Here, the vacuum machine can also be a single vacuum pump, but the time it takes for the measuring cylinder 2 to reach the required negative pressure will be slightly longer.

[0059] Measuring cylinder 2 is a sealed container with a funnel-shaped bottom (to facilitate liquid outflow). Measuring cylinder 2 must withstand certain positive and negative pressures. The top has multiple ports: one port connects to the feed valve 6, the second to the vacuum valve 8, the third to the compressed air valve 9, the fourth to the water inlet valve 7, the fifth to the discharge valve 5, and the sixth to the pressure relief valve. The bottom of measuring cylinder 2 is connected to the weighing sensor 3.

[0060] Weighing sensor 3 is a weight sensing element responsible for transmitting the real-time weight on the measuring cylinder 2 to the system MCU via an electrical signal.

[0061] The washing machine is the final destination for feeding materials. One application scenario of this embodiment is to automatically feed materials into the washing machines of commercial laundries.

[0062] Vacuum valve 8, compressed air valve 9, water inlet valve 7, flushing valve, air flushing valve, material distribution valve 10, discharge valve 5, feed valve 6, etc. are all different types of valves, which can be solenoid valves, electric ball valves, pneumatic ball valves, etc.

[0063] A pressure relief valve is a type of valve that automatically relieves pressure.

[0064] In order not to affect the accuracy of the weighing sensor 3, all tubes connected to the measuring cylinder 2 are flexible hoses, and the sensor is calibrated by the MCU to eliminate the influence of the connecting hoses on the sensor stress.

[0065] Example 2:

[0066] This embodiment is based on the above embodiment 1, such as... Figure 1 The material handling process is illustrated with a specific embodiment.

[0067] First, open the vacuum valve 8. After the metering cylinder 2 becomes negatively pressurized, open the feed valve 6. At this time, the liquid in the feed tank enters the negatively pressurized metering cylinder 2 under atmospheric pressure. Simultaneously, the weighing sensor 3 senses the change in weight of the metering cylinder 2 and transmits the data to the MCU module for data processing via an electrical signal. When the weight of the metering cylinder 2 reaches the set value, close the feed valve 6, thus completing the process of taking liquid into the metering cylinder 2. Then, open the compressed air valve 9, and compressed air enters the metering cylinder 2, making the metering cylinder 2 positively pressurized (generally set to 0.2 MPa). Then, open the dispensing valve 10 and the discharge valve 5. The liquid is forced out of the metering cylinder 2 under the action of compressed air and is transported to the washing machine through the discharge valve 5 and the dispensing valve 10 along the conveying pipe. At the same time, the weighing sensor 3 senses the weight of the metering cylinder 2. When the weight of measuring cylinder 2 is the same as before feeding, it indicates that all the liquid has been discharged. At this time, the water inlet valve 7 is opened, and tap water enters the measuring cylinder 2 through the pipeline and cleans the measuring cylinder 2 through the cleaning nozzle (the time can be set). In this embodiment, the inlet end of the cleaning nozzle is connected to the water inlet valve 7 of the measuring cylinder 2, and the outlet end is suspended at the top of the measuring cylinder 2 through a connector. It is similar to a fire sprinkler, which can evenly spray water and clean the inner wall of the measuring cylinder more thoroughly. After cleaning, the water inlet valve 7 is closed. After the weighing sensor 3 senses that the water that entered for cleaning has also been discharged, the discharge valve 5 is closed, and the water pump is turned on and the flushing valve is opened to flush the pipeline. After flushing, the water pump is turned off and the flushing valve is closed. Then the air valve is opened to flush the pipeline again with compressed air. After completion, the air valve is closed, and one feeding process is completed.

[0068] The other parts of this embodiment are the same as those in Embodiment 1 above, so they will not be described again.

[0069] Example 3:

[0070] This embodiment is based on any one of Embodiments 1-2 above, such as Figure 2 As shown, a one-to-ten liquid dispenser is used for illustration.

[0071] like Figure 2 As shown in the diagram, the 1-to-10 liquid distributor can intelligently distribute 7 kinds of liquids by expanding the number of metering cylinders 2 and dispensing valves 10, which can meet the automatic feeding needs of 10 washing machines. The 1-to-10 liquid distributor is installed in the bracket 11. The precision pressure regulating valve 12 is used to precisely control the positive pressure of the metering cylinder 2, which can stabilize the positive pressure between 0.1-0.4MPa to avoid excessive pressure causing container rupture, leakage, damage, etc. Its inlet section is connected to the air compressor, and its outlet end is connected to the compressed air valve 9 of the metering cylinder 2.

[0072] The other parts of this embodiment are the same as any one of the above embodiments 1-2, so they will not be described again.

[0073] Example 4:

[0074] This embodiment is based on any one of embodiments 1-3 above, such as Figure 3 As shown, the structure of a single-unit measuring cylinder 2 is illustrated with a specific embodiment.

[0075] The outlet end of the discharge valve 5 is connected to the distribution solenoid valve through a pipeline. The distribution solenoid valve transports the material to the destination through the pipeline. The inlet end is connected to the discharge port 13 of the metering cylinder through a hose.

[0076] Compressed air valve 9 has an inlet end connected to compressed air and an outlet end connected to the interface on the metering cylinder sealing cover 1 at the top of the metering cylinder 2 via a hose, so that compressed air is introduced into the metering cylinder 2. When the compressed air valve 9 is opened, the pressure inside the metering cylinder 2 is 0.2MPa.

[0077] The inlet end of the vacuum valve 8 is connected to the vacuum pump, and the outlet end is connected to the interface on the metering cylinder sealing cover 1 at the top of the metering cylinder 2 through a hose. When the vacuum valve 8 is opened, the inside of the metering cylinder 2 is evacuated to a negative pressure.

[0078] The inlet end of the water inlet valve 7 is connected to tap water, and the outlet end is connected to the interface on the metering cylinder sealing cover 1 at the top of the metering cylinder 2 through a hose. The lower end of the interface is connected to the cleaning nozzle. When the water inlet valve 7 is opened, tap water can enter the metering cylinder 2 to clean the wall of the metering cylinder 2.

[0079] The inlet end of the feed valve 6 is connected to the liquid tank, and the outlet end is connected to the interface on the metering cylinder sealing cover 1 at the top of the metering cylinder 2 via a hose.

[0080] The weighing sensor 3 senses the weight inside the measuring cylinder 2 in real time and sends the data to the MCU for data processing.

[0081] Material handling process:

[0082] 1. Open vacuum valve 8, and the inside of measuring cylinder 2 becomes negative pressure;

[0083] 2. Open the feed valve 6. The liquid enters the negative pressure metering cylinder 2 under atmospheric pressure. The weighing sensor 3 senses the change in weight of the metering cylinder 2 in real time, thereby monitoring the weight of the liquid entering the metering cylinder 2.

[0084] 3. When the weight of the liquid entering the metering cylinder 2 reaches the set value, close the feed valve 6 and close the vacuum valve 8;

[0085] 4. Open the compressed air valve 9 to make the pressure inside the measuring cylinder 2 reach 0.2MPa positive pressure;

[0086] 5. Open the discharge valve 5. Under the pressure of compressed air, the liquid is discharged from the metering cylinder 2. At the same time, the weighing sensor 3 senses the weight change of the metering cylinder 2 in real time, thereby monitoring the weight of the liquid discharged from the metering cylinder 2.

[0087] 6. When the weighing sensor 3 detects that the liquid has been drained, the water inlet valve 7 is opened, and tap water is sprayed out from the cleaning nozzle to clean the wall of the measuring cylinder 2; the weighing sensor 3 is mounted on the weighing sensor bracket 4.

[0088] 7. After cleaning, close the water inlet valve 7. After the liquid is drained, close the compressed air valve 9 and the discharge valve 5 to complete the feeding process of a single metering cylinder 2.

[0089] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0090] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A liquid dispenser that does not require flow measurement, characterized in that, Includes a measuring cylinder (2), an MCU module, a weighing sensor (3), a vacuum valve (8), a compressed air valve (9), and a pressure relief valve; The input end of the vacuum valve (8) is connected to the vacuum machine, and the output end of the vacuum valve (8) is connected to the first input interface of the metering cylinder (2). The input end of the compressed air valve (9) is connected to the air compressor, and the output end of the compressed air valve (9) is connected to the second input interface of the metering cylinder (2). The pressure relief valve is connected to the first output port of the metering cylinder (2); The input end of the weighing sensor (3) is connected to the second output interface of the measuring cylinder (2), and the output end of the weighing sensor (3) is connected to the input end of the MCU module. The vacuum valve (8) is used to change the air pressure in the metering cylinder (2) to a negative pressure and extract corrosive liquid by drawing negative pressure. The compressed air valve (9) is used to change the air pressure in the metering cylinder (2) to positive pressure and force the corrosive liquid out of the metering cylinder (2); The pressure relief valve is used to automatically release the air pressure inside the metering cylinder (2); The weighing sensor (3) is used to convert the real-time weight data obtained from the measuring cylinder (2) into an electrical signal and transmit it to the MCU module.

2. A liquid dispenser according to claim 1, wherein The liquid distributor that does not require flow measurement also includes a feed valve (6), a discharge valve (5), and a distribution valve (10). The input end of the feed valve (6) is connected to the output end of the feed barrel, and the output end of the feed valve (6) is connected to the third input interface of the metering cylinder (2). The input end of the discharge valve (5) is connected to the third output interface of the metering cylinder (2), and the output end of the discharge valve (5) is connected to the first input end of the distributing valve (10). The output end of the feed valve (10) is connected to the washing machine through a feed pipe.

3. A liquid dispenser according to claim 1, wherein The liquid distributor that does not require flow measurement also includes an inlet valve (7). The water inlet valve (7) is connected to the input end of the water source, and the output end of the water inlet valve (7) is connected to the fourth input interface of the metering cylinder (2).

4. A liquid dispenser that does not require flow measurement according to claim 2, characterized in that, The liquid dispenser that does not require flow measurement also includes an air-filling valve; The input end of the air-filling valve is connected to the air compressor, and the output end of the air-filling valve is connected to the second input end of the material distribution valve (10).

5. A liquid dispenser that does not require flow measurement according to claim 2, characterized in that, The liquid distributor that does not require flow measurement also includes a flush valve; The input end of the flushing valve is connected to the water pump, and the output end of the flushing valve is connected to the third input end of the dispensing valve (10).

6. A liquid dispenser that does not require flow measurement according to claim 1, characterized in that, The weighing sensor (3) is located at the bottom of the measuring cylinder (2).

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