Proportional dosing device and reverse osmosis equipment

Abstract

The utility model provides a proportional dosing device and reverse osmosis equipment, and the proportional dosing device comprises a main pipeline, a first bypass, a second bypass, a medicine suction pipeline and an ejector, the inlet end of the first bypass and the outlet end of the second bypass are correspondingly connected with the inlet end of the pressure adjusting piece and the outlet end of the pressure adjusting piece respectively, the jet device is provided with a first port, a second port and a third port, the first port is connected with the outlet end of the first bypass, and the second port is connected with the inlet end of the second bypass. The third opening is connected with the outlet end of the medicine suction pipeline, and a first valve is arranged on the first bypass and / or the main pipeline. According to the proportional dosing device disclosed by the utility model, a relatively stable dosing and mixing process can be realized, and the problem of backflow is avoided; the concentration of the medicament in the pipeline can be kept constant, so that the medicament effect can be better exerted; the explosion-proof device is simple in structure, does not need electricity, reduces power consumption, reduces cost, has good safety and reliability, and is suitable for being used in an explosion-proof environment.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine dosing equipment, and particularly to a proportional dosing device and a reverse osmosis equipment. Background Art

[0002] In industries such as water treatment and gardening, it is necessary to add medicine to water. In the prior art, an electric metering pump or the like is generally used as a dosing pump to add medicine. However, the electric metering pump adopts a pulsed dosing method, which may cause the concentration of medicine in water to be unstable, affecting the actual use effect of the medicine; moreover, when the water flow pressure is higher than the output pressure of the electric metering pump, the medicine cannot be injected into the water flow, or when the water flow pressure fluctuates, the situation of medicine backflow may occur; in addition, for an explosion-proof environment, the electric metering pump must use an explosion-proof motor, and its operation and maintenance are relatively complex, and the use cost is relatively high. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a proportional dosing device and a reverse osmosis equipment, so as to solve at least one of the technical problems such as unstable medicine concentration, inability to normally add medicine when facing higher or fluctuating water flow pressure, inapplicability to explosion-proof environment, and high cost in the related art.

[0004] To achieve the above purpose, according to the utility model, a proportional dosing device is provided, which includes a main pipeline, a first bypass, a second bypass, a medicine suction pipeline, and a jet injector. A pressure regulating member is provided on the main pipeline. The inlet end of the first bypass and the outlet end of the second bypass are respectively and correspondingly connected to the inlet end and the outlet end of the pressure regulating member. The jet injector has a first port, a second port, and a third port. The first port is connected to the outlet end of the first bypass, the second port is connected to the inlet end of the second bypass, and the third port is connected to the outlet end of the medicine suction pipeline. A first valve is provided on the first bypass and / or the main pipeline.

[0005] Further, a first pressure measuring member and a second pressure measuring member are provided on the main pipeline. The first pressure measuring member is located upstream of the pressure regulating member, and the second pressure measuring member is located downstream of the pressure regulating member.

[0006] Further, a medicine tank is further included, and the outlet end of the medicine tank is communicated with the inlet end of the medicine suction pipeline.

[0007] Further, a flow measuring member is provided on the medicine suction pipeline; a flow regulating portion is provided on the flow measuring member to regulate the flow of the medicine suction pipeline.

[0008] Further, the injector includes a converging pipe, a diverging pipe, and a throat nozzle pipe. The throat nozzle pipe has the third port, the fourth port, and the fifth port. The converging pipe and the diverging pipe are respectively detachably connected to the fourth port and the fifth port. The third port is detachably connected to the outlet end of the medicine suction pipeline. The converging pipe is provided with the first port to be detachably connected to the outlet end of the first bypass. The diverging pipe is provided with the second port to be detachably connected to the inlet end of the second bypass.

[0009] Further, the ratio of the inner diameter of the main pipeline to the inner diameter of the first bypass is 1-20:1, and the ratio of the inner diameter of the main pipeline to the inner diameter of the second bypass is 1-20:1.

[0010] The present utility model further provides a reverse osmosis device, which includes a reverse osmosis membrane module, a filtration pipeline, a pure water pipeline, a concentrated water pipeline, and the proportional medicine adding device. The outlet end of the filtration pipeline is connected to the inlet end of the main pipeline. The reverse osmosis membrane module has a water inlet, a pure water outlet, and a concentrated water outlet. The outlet end of the main pipeline is connected to the water inlet. The pure water outlet is connected to the pure water pipeline. The concentrated water outlet is connected to the concentrated water pipeline.

[0011] Further, it further includes a dilution pipeline. A second valve is provided on the dilution pipeline. The proportional medicine adding device includes a medicine tank. The outlet end of the medicine tank is communicated with the inlet end of the medicine suction pipeline. The inlet end of the dilution pipeline is connected to the pure water outlet. The outlet end of the dilution pipeline is connected to the inlet end of the medicine tank.

[0012] Further, the filtration pipeline is provided with a coarse filter and a fine filter. The coarse filter is located upstream of the fine filter.

[0013] Further, the concentrated water pipeline is provided with a third valve and a fourth valve connected in parallel.

[0014] In the proportional chemical dosing device of the present utility model, by setting a pressure regulating member, the liquid in the main pipeline flows through the pressure regulating member to generate a certain pressure difference, and thus there is also a pressure difference at both ends of the bypass formed by the first bypass and the second bypass. When chemical dosing is required, the first valve is opened, and a part of the liquid passes through the first port and the second port of the injector, and a negative pressure area is formed inside the injector, so that the chemical agent in the chemical suction pipeline is sucked into the injector through the third port. The mixed chemical dosing liquid enters the main pipeline for re - mixing, and then flows to the chemical using end to achieve the chemical dosing function. No matter how the inlet water pressure fluctuates or when the inlet water pressure is relatively large, the pressure difference between the first port and the second port is relatively constant, which can ensure that the liquid flows from the first port to the second port, and thus achieve a relatively stable chemical dosing and mixing process, avoiding the problem of liquid backflow caused by the fluctuation of the inlet water pressure. By adjusting the first valve to regulate the flow rate of the bypass, the liquid inflow volume entering the injector through the first port changes, and accordingly the chemical dosing amount changes proportionally, so as to keep the concentration of the chemical agent in the pipeline constant, which is beneficial to better exerting the effect of the chemical agent. In addition, compared with the scheme of an electric metering pump, the present utility model uses hydraulic pressure (i.e., the feed water pressure) as the driving force, without the need for electricity, eliminating equipment such as high - pressure pumps and chemical dosing pumps, reducing power consumption, and also reducing costs. It also has good safety and reliability and is suitable for use in explosion - proof environments.

[0015] The reverse osmosis equipment in the present utility model has all the beneficial effects of the above - mentioned proportional chemical dosing device, which will not be elaborated here. Brief Description of the Drawings

[0016] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0017] Figure 1 It is a schematic diagram of the proportional chemical dosing device provided by an embodiment of the present utility model;

[0018] Figure 2 It is an exploded view of the injector provided by an embodiment of the present utility model;

[0019] Figure 3 It is a schematic diagram of the injector provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the reverse osmosis equipment provided by an embodiment of the present utility model.

[0021] Among them, the above - mentioned drawings include the following reference numerals:

[0022] 1. Main pipeline; 11. Pressure regulating component; 12. First pressure measuring component; 13. Second pressure measuring component; 2. First bypass; 21. First valve; 3. Second bypass; 4. Medicine suction pipeline; 41. Flow measuring component; 5. Injector; 51. Converging tube; 511. First port; 52. Diverging tube; 521. Second port; 53. Throat nozzle tube; 531. Third port; 532. Fourth port; 533. Fifth port; 6. Medicine tank; 01. Reverse osmosis membrane module; 011. Water inlet; 012. Pure water outlet; 013. Concentrated water outlet; 02. Filtering pipeline; 021. Coarse filter; 022. Fine filter; 03. Pure water pipeline; 031. Pure water tank; 04. Concentrated water pipeline; 041. Third valve; 042. Fourth valve; 05. Dilution pipeline; 051. Second valve. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] The utility model provides a proportional dosing device, which includes a main pipeline 1, a first bypass 2, a second bypass 3, a medicine suction pipeline 4, and an injector 5. A pressure regulator 11 is provided on the main pipeline 1. The inlet end of the first bypass 2 and the outlet end of the second bypass 3 are respectively and correspondingly connected to the inlet end and the outlet end of the pressure regulator 11. The injector 5 has a first port 511, a second port 521, and a third port 531. The first port 511 is connected to the outlet end of the first bypass 2, the second port 521 is connected to the inlet end of the second bypass 3, and the third port 531 is connected to the outlet end of the medicine suction pipeline 4. A first valve 21 is provided on the first bypass 2 and / or the main pipeline 1.

[0027] Combined with Figure 1 As shown, the flow direction of the liquid is indicated by arrows in the figure, so that the inlet end and the outlet end of the corresponding components can be seen. The liquid in the upstream part of the main pipeline 1 flows through the pressure regulator 11. The pressure regulator 11 can be selected from structures such as a pressure reducing valve, a regulating valve, or a throttle valve, as long as it can generate a certain pressure difference. In this embodiment, the first valve 21 is provided on the first bypass 2. Combined with Figure 2 As shown, since the pressure difference at both ends of the bypass formed by the first bypass 2 and the second bypass 3 is equal to the pressure difference at both ends of the pressure regulator 11, when the first valve 21 is opened, there is also a pressure difference between the first port 511 and the second port 521 of the injector 5. A part of the liquid enters the first bypass 2 from the upstream part of the main pipeline 1, passes through the first port 511 and the second port 521 in sequence, and returns to the downstream part of the main pipeline 1 through the second bypass 3. When the liquid flows through the inside of the injector 5, a negative pressure area will be formed, so that the medicine in the medicine suction pipeline 4 is sucked into the injector 5 through the third port 531, so that the liquid is mixed with the medicine. The mixed dosing liquid flows from the second port 521 through the second bypass 3 into the downstream part of the main pipeline 1, and after being mixed with the liquid in the main pipeline 1 again, it flows out to the medication end.

[0028] It can be understood that the first valve 21 is provided on the main pipeline 1 and / or the first bypass 2, and the function of adjusting the flow rate can be realized by adjusting the opening degree of the first valve 21. The specific installation position of the first valve 21 is not limited here.

[0029] In the proportional chemical dosing device of the present utility model, by setting the pressure regulating member 11, a certain pressure difference is generated when the liquid in the main pipeline 1 flows through the pressure regulating member 11. As a result, there is also a pressure difference at both ends of the bypass formed by the first bypass 2 and the second bypass 3. When chemical dosing is required, the first valve 21 is opened. A part of the liquid passes through the first port 511 and the second port 521 of the injector 5, and a negative pressure area is formed inside the injector 5, so that the chemical agent in the chemical suction pipeline 4 is sucked into the injector 5 through the third port 531. The mixed chemical dosing liquid enters the main pipeline 1 and is mixed again, and then flows to the chemical using end to achieve the chemical dosing function. Regardless of how the inlet water pressure fluctuates or when the inlet water pressure is relatively large, the pressure difference between the first port 511 and the second port 521 is relatively constant, which can ensure that the liquid flows from the first port 511 to the second port 521, thereby realizing a relatively stable chemical dosing and mixing process, and avoiding the problem of liquid backflow caused by the fluctuation of the inlet water pressure. By adjusting the first valve 21 to regulate the flow rate of the bypass, the liquid flow rate entering the injector 5 through the first port 511 changes, and the corresponding chemical dosing amount changes proportionally, so as to keep the concentration of the chemical agent in the pipeline constant, which is beneficial to better exert the effect of the chemical agent. In addition, compared with the scheme of an electric metering pump, the present utility model uses hydraulic pressure (i.e., the water supply pressure) as the driving force, does not require electricity, eliminates equipment such as high-pressure pumps and chemical dosing pumps, reduces power consumption, and also reduces costs. It also has good safety and reliability and is suitable for use in explosion-proof environments.

[0030] Further, a first pressure measuring member 12 and a second pressure measuring member 13 are provided on the main pipeline 1. The first pressure measuring member 12 is located upstream of the pressure regulating member 11, and the second pressure measuring member 13 is located downstream of the pressure regulating member 11.

[0031] Combined with Figure 1 As shown, a first pressure measuring member 12 and a second pressure measuring member 13 are provided on the main pipeline 1. The first pressure measuring member 12 and the second pressure measuring member 13 are respectively located upstream and downstream of the pressure regulating member 11, so that the pressure difference change at both ends of the pressure regulating member 11 can be monitored in real time and accurately.

[0032] Further, a chemical agent tank 6 is further included. The outlet end of the chemical agent tank 6 is communicated with the inlet end of the chemical suction pipeline 4.

[0033] Combined with Figure 1 and Figure 2 As shown, the chemical agent tank 6 can store the chemical agent to be added. The outlet end of the chemical agent tank 6 is communicated with the inlet end of the chemical suction pipeline 4. When the liquid in the bypass passes through the injector 5, a negative pressure area is formed inside the injector 5, so that the chemical agent in the chemical agent tank 6 is sucked into the injector 5 through the chemical suction pipeline 4 and the third port 531 and mixed with the liquid.

[0034] Further, combined with Figure 1As shown, a flow measurement member 41 is provided on the medicine suction pipeline 4.

[0035] In this way, the flow rate of the medicine in the medicine suction pipeline 4 can be monitored in real time and accurately through the flow measurement member 41.

[0036] Preferably, a flow rate adjustment part is provided on the flow measurement member 41 to adjust the flow rate of the medicine suction pipeline. For example, the flow measurement member 41 adopts an adjustable flowmeter, and its flow rate adjustment part is the flow rate adjustment knob.

[0037] In this way, the secondary adjustment of the medicine addition amount can be realized through the flow rate adjustment part, which is especially suitable for some scenarios with relatively small required medicine addition amounts.

[0038] Furthermore, the injector 5 includes a converging pipe 51, a diverging pipe 52 and a throat nozzle pipe 53. The throat nozzle pipe 53 has the third port 531, the fourth port 532 and the fifth port 533. The converging pipe 51 and the diverging pipe 52 are respectively detachably connected to the fourth port 532 and the fifth port 533. The third port 531 is detachably connected to the outlet end of the medicine suction pipeline 4. The converging pipe 51 is provided with the first port 511 to be detachably connected to the outlet end of the first bypass 2. The diverging pipe 52 is provided with the second port 521 to be detachably connected to the inlet end of the second bypass 3.

[0039] Combined Figure 2 and Figure 3 As shown, exemplarily, external threads are provided on the converging pipe 51 and the diverging pipe 52, internal threads are provided in the fourth port 532 and the fifth port 533 of the throat nozzle pipe 53. The converging pipe 51 is in threaded connection and cooperation with the fourth port 532, the diverging pipe 52 is in threaded connection and cooperation with the fifth port 533. Similarly, the converging pipe 51 is in threaded connection and cooperation with the outlet end of the first bypass 2, the diverging pipe 52 is in threaded connection and cooperation with the inlet end of the second bypass 3, and the third port 531 of the throat nozzle pipe 53 is in threaded connection and cooperation with the outlet end of the medicine suction pipeline 4.

[0040] It can be understood that those skilled in the art can also choose other ways to achieve detachable connection. In this embodiment, the detachable function of the injector 5 is exemplarily achieved through threaded connection. In this way, the disassembly and assembly of the injector 5 are more convenient, and the injector 5 can be disassembled for cleaning to prevent blockage of the injector 5 caused by reasons such as medicine deterioration.

[0041] Preferably, the ratio of the inner diameter of the main pipeline 1 to the inner diameter of the first bypass 2 is 1 - 20:1, and the ratio of the inner diameter of the main pipeline 1 to the inner diameter of the second bypass 3 is 1 - 20:1.

[0042] In this way, the flow rate of the main pipeline 1 can be kept relatively large, and the bypass flow rates formed by the first bypass 2 and the second bypass 3 are relatively small, ensuring that the medicine addition ratio meets the requirements.

[0043] The utility model also provides a reverse osmosis device, which includes a reverse osmosis membrane module 01, a filter pipeline 02, a pure water pipeline 03, a concentrated water pipeline 04 and the proportional chemical dosing device. The outlet end of the filter pipeline 02 is connected to the inlet end of the main pipeline 1. The reverse osmosis membrane module 01 has a water inlet 011, a pure water outlet 012 and a concentrated water outlet 013. The outlet end of the main pipeline 1 is connected to the water inlet 011. The pure water outlet 012 is connected to the pure water pipeline 03, and the concentrated water outlet 013 is connected to the concentrated water pipeline 04.

[0044] Combined Figure 4 As shown, the inlet end of the main pipeline 1 of the proportional chemical dosing device is connected to the outlet end of the filter pipeline 02. The liquid entering the system is filtered through the filter pipeline 02. The outlet end of the main pipeline 1 is connected to the water inlet 011 of the reverse osmosis membrane module 01. The liquid enters the reverse osmosis membrane module 01 and is processed into concentrated water and pure water. The concentrated water enters the concentrated water pipeline 04 through the concentrated water outlet 013, and the pure water enters the pure water pipeline 03 through the pure water outlet 012 (a pure water tank 031 can be provided in the pure water pipeline 03 to store pure water). A part of the liquid upstream of the main pipeline 1 enters the first bypass 2 and the second bypass 3, and a negative pressure area is formed inside through the ejector 5, so that the chemical agent in the chemical agent suction pipeline 4 is sucked into the ejector 5 and mixed to form a chemical dosing liquid. The chemical dosing liquid enters the downstream of the main pipeline 1 through the second bypass 3, and then enters the reverse osmosis membrane module 01. The chemical agent can be any chemical agent or a combination of chemical agents such as scale inhibitor, bactericide, reducing agent, etc., and can achieve the corresponding chemical dosing effect.

[0045] The reverse osmosis equipment in the present utility model adopts the above-mentioned proportional dosing device. A pressure regulating member 11 is provided on the main pipeline 1 of the proportional dosing device, so that a certain pressure difference is generated when the liquid in the main pipeline 1 flows through the pressure regulating member 11. As a result, there is also a pressure difference at both ends of the bypass formed by the first bypass 2 and the second bypass 3. When dosing is required, the first valve 21 is opened, and a part of the liquid passes through the first port 511 and the second port 521 of the ejector 5, and a negative pressure area is formed inside the ejector 5, so that the medicament in the medicine suction pipeline 4 is sucked into the ejector 5 through the third port 531. The mixed dosing liquid enters the main pipeline 1 and is mixed again, and then flows into the reverse osmosis membrane module 01 to realize the corresponding dosing function; regardless of how the inlet water pressure fluctuates or when the inlet water pressure is relatively large, the pressure difference between the first port 511 and the second port 521 is relatively constant, which can ensure that the liquid flows from the first port 511 to the second port 521, thus realizing a relatively stable dosing and mixing process, and avoiding the problem of liquid backflow caused by the fluctuation of the inlet water pressure; by adjusting the first valve 21 to adjust the flow rate of the bypass, the liquid flow rate entering the ejector 5 through the first port 511 changes, and the corresponding dosing amount changes proportionally, so as to keep the concentration of the medicament in the pipeline constant, which is beneficial to better exert the effect of the medicament; in addition, compared with the scheme of an electric metering pump, the present utility model uses hydraulic pressure (i.e., the feed water pressure) as the driving force, without using electricity, eliminating equipment such as high-pressure pumps and dosing pumps, reducing power consumption, and reducing costs. It also has good safety and reliability and is suitable for use in explosion-proof environments.

[0046] Furthermore, it further includes a dilution pipeline 05. A second valve 051 is provided on the dilution pipeline 05. The proportional dosing device includes a medicine tank 6. The outlet end of the medicine tank 6 is communicated with the inlet end of the medicine suction pipeline 4. The inlet end of the dilution pipeline 05 is connected to the pure water outlet 012, and the outlet end of the dilution pipeline 05 is connected to the inlet end of the medicine tank 6.

[0047] Combined with Figure 4 As shown, the inlet end of the dilution pipeline 05 is connected to the pure water outlet 012, and a second valve 051 is provided on the dilution pipeline 05. By adjusting the opening degree of the second valve 051, the pure water entering the medicine tank 6 can be controlled, and the medicament is diluted by using the pure water generated by reverse osmosis to ensure the purity of the water used for medicament dilution.

[0048] Furthermore, a coarse filter 021 and a fine filter 022 are provided on the filter pipeline 02, and the coarse filter 021 is located upstream of the fine filter 022.

[0049] Combined with Figure 4 As shown, the present utility model can use underground mine water. The underground mine water first undergoes coarse filtration by the coarse filter 021 and then undergoes fine filtration by the fine filter 022 to ensure that there are fewer impurities in the underground mine water entering the system.

[0050] Furthermore, a third valve 041 and a fourth valve 042 are provided in parallel in the concentrated water pipeline 04.

[0051] Combined with Figure 4 As shown in the figure, the third valve 041 in the figure is a regulating valve, and the ratio of concentrated water to pure water can be adjusted by adjusting the opening degree of the third valve 041; the fourth valve 042 in the figure is an electric valve. During the normal water production process of the reverse osmosis device, the fourth valve 042 remains closed. When the reverse osmosis device needs to be flushed, the fourth valve 042 is opened, and the third valve 041 can also remain open, so that the flushing water flow rate increases and the flushing effect is improved. Finally, the flushing water is discharged through the fourth valve 042 and the third valve 041.

[0052] In this way, the function of adjusting the ratio of concentrated water to pure water can be realized through the third valve 041 to meet the water production requirements; the function of quickly flushing the reverse osmosis device can be realized through the fourth valve 042. The flushing water will also pass through the filtration of the filtration pipeline 02, realizing the integration of the rapid flushing and filtration processes and improving the flushing effect.

[0053] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0054] For the convenience of description, spatial relative terms such as "above...", "above...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "beneath other devices or structures" afterwards. Thus, the exemplary term "above..." can include two orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations are made for the spatial relative descriptions used here.

[0055] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above terms have no special meanings, so it should not be construed as a limitation on the protection scope of the present utility model.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A proportional dosing device, characterized in that: It includes a main line, a first bypass, a second bypass, a drug suction line, and an ejector. The main line is provided with a pressure regulating component. The inlet end of the first bypass and the outlet end of the second bypass are respectively connected to the inlet end and the outlet end of the pressure regulating component. The ejector has a first port, a second port and a third port. The first port is connected to the outlet end of the first bypass, the second port is connected to the inlet end of the second bypass, and the third port is connected to the outlet end of the drug suction line. The first bypass and / or the main line are provided with a first valve.

2. The proportional dosing device according to claim 1, characterized in that: The main pipe is provided with a first pressure measuring device and a second pressure measuring device. The first pressure measuring device is located upstream of the pressure regulating device, and the second pressure measuring device is located downstream of the pressure regulating device.

3. The proportional dosing device according to claim 1, characterized in that: It also includes a medicine box, the outlet end of which is connected to the inlet end of the medicine suction pipeline.

4. The proportional dosing device according to claim 3, characterized in that: The medicine suction pipeline is provided with a flow measuring component; the flow measuring component is provided with a flow regulating part to regulate the flow of the medicine suction pipeline.

5. The proportional dosing device according to claim 1, characterized in that: The ejector includes a convergent tube, an expander tube and a throat and nozzle tube, the throat and nozzle tube having the third port, the fourth port and the fifth port, the convergent tube and the expander tube are detachably connected to the fourth port and the fifth port respectively, the third port is detachably connected to the outlet end of the drug inhalation pipeline, the convergent tube is provided with the first port so as to be detachably connected to the outlet end of the first bypass, and the expander tube is provided with the second port so as to be detachably connected to the inlet end of the second bypass.

6. The proportional dosing device according to claim 1, characterized in that: The ratio of the inner diameter of the main channel to the inner diameter of the first bypass channel is 1 to 20:1, and the ratio of the inner diameter of the main channel to the inner diameter of the second bypass channel is 1 to 20:

1.

7. A reverse osmosis device, characterized in that: It comprises a reverse osmosis membrane group, a filtration pipeline, a pure water pipeline, a concentrate water pipeline and the proportional dosing device as described in any one of claims 1 to 6, wherein the outlet end of the filtration pipeline is connected to the inlet end of the main pipeline, the reverse osmosis membrane group has a water inlet, a pure water outlet and a concentrate water outlet, the outlet end of the main pipeline is connected to the water inlet, the pure water outlet is connected to the pure water pipeline, and the concentrate water outlet is connected to the concentrate water pipeline.

8. The reverse osmosis device according to claim 7, characterized in that: It also includes a dilution pipeline, which is provided with a second valve. The proportional dosing device includes a medicine box, the outlet end of the medicine box is connected to the inlet end of the medicine suction pipeline, the inlet end of the dilution pipeline is connected to the pure water outlet, and the outlet end of the dilution pipeline is connected to the inlet end of the medicine box.

9. The reverse osmosis device according to claim 7, characterized in that: The filtering pipeline is provided with a coarse filter and a fine filter, and the coarse filter is located upstream of the fine filter.

10. The reverse osmosis device according to claim 7, characterized in that: The concentrated water pipeline is provided with a third valve and a fourth valve which are connected in parallel with each other.

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