Water drawing device for quantitatively conveying liquid medium

Abstract

The utility model discloses a water drawing device for quantitative delivery of liquid medium, which comprises a driving device and a scoop assembly, the scoop assembly is positioned in a box body and is driven by the driving device to rotate around the axis of the scoop assembly, the liquid medium in the box body is quantitatively discharged to the next process equipment, the driving device comprises a servo motor, the scoop assembly comprises a scoop, and the scoop assembly is positioned in the box body and is driven by the driving device to rotate around the axis of the scoop assembly. The servo motor drives the scoop to do circular motion in the box body, the servo motor is connected with the control system, and the control system adjusts the rotating speed of the servo motor according to actual flow feedback data; the closed-loop control mode that the servo motor drives the scooping bucket and the control system is adopted, the rotating speed of the motor can be accurately adjusted in real time according to the actual flow requirement, high-precision metering of the liquid medium conveying amount is ensured, and the problem that a traditional metering pump is insufficient in metering precision is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of chemical metering instrument technology, specifically to a water pump for quantitative delivery of liquid media. Background Technology

[0002] In chemical experiments, the precise preparation of liquid media solutions of a specific concentration is a crucial step. This process places strict requirements on the accuracy of liquid media delivery and flow control, directly affecting the accuracy, stability, and quality of the final product.

[0003] Currently, in related fields, traditional metering pumps are commonly used devices for conveying liquids and controlling flow rates. However, when faced with the liquid medium solution conveying requirements of this experiment, metering pumps revealed several insurmountable limitations. First, metering pumps cannot meet the high precision requirements of the experiment for the liquid medium solution. In chemical experiments, even small deviations in the concentration of the liquid medium can significantly affect the reaction process and product quality, and metering pumps cannot provide sufficiently precise metering functions to ensure that the concentration of the liquid medium solution is always maintained within the required strict range. Second, the limited flow rate adjustment range is another major problem with metering pumps. During the experiment, the required flow rate of the liquid medium solution will vary within a certain range depending on different reaction stages and process conditions (e.g., the required flow rate adjustment range in this experiment is 5-30 L / h, and the normal operating flow rate is 12 L / h), but metering pumps cannot flexibly and accurately adjust the flow rate within such a range, making it difficult to adapt to the dynamic needs of the experiment.

[0004] Furthermore, during the experiment, real-time monitoring of the liquid medium solution's delivery, sampling and analysis of the solution, and adding other media when necessary are also indispensable. However, the structural design of traditional metering pumps presents significant inconveniences in these aspects. Their highly enclosed structure makes it difficult to directly observe and sample the internal liquid during operation, hindering operators from timely monitoring of the liquid medium solution's status and making it impossible to quickly and conveniently add media, severely impacting the efficiency and controllability of the experiment. Utility Model Content

[0005] The purpose of this invention is to provide a water pump for quantitative liquid medium delivery, which overcomes the problems of insufficient metering accuracy and limited flow adjustment range of traditional metering pumps when delivering liquid medium, so as to achieve the purpose of quantitative liquid medium delivery and flow adjustment.

[0006] This utility model is achieved through the following technical solution:

[0007] A water pump for quantitative delivery of liquid media, comprising:

[0008] Drive unit;

[0009] A hopper assembly, located in a housing and driven by the drive device to rotate around its own axis, quantitatively discharges the liquid medium in the housing to the next process equipment;

[0010] The driving device includes a servo motor, the scoop assembly includes a scoop, the servo motor drives the scoop to perform circular motion in the box, and the servo motor is connected to the control system, which adjusts the speed of the servo motor according to the actual flow feedback data.

[0011] In this design, a servo motor serves as the power source, driving the scoop to rotate in a circular motion within the chamber. The scoop in the scoop assembly works in conjunction with the servo motor to achieve flow regulation. When the servo motor operates, it drives the scoop, which scoops liquid medium from the bottom of the chamber. During rotation, gravity forces the liquid medium into a specific flow channel. The servo motor's speed is adjusted based on the required flow rate on-site, thereby continuously regulating the test calibration flow rate. If the flow rate in the channel is lower than the required value, the control system increases the servo motor speed, accelerating the scoop's movement frequency and increasing the liquid medium delivery rate; conversely, if the flow rate is too high, the speed is reduced to decrease the delivery rate. Thus, through the close coordination between the servo motor and the control system, precise quantitative delivery of the liquid medium is achieved, meeting the stringent requirements for liquid medium delivery accuracy and flow control in chemical experiments, ensuring the accuracy and stability of the experiment.

[0012] As a further embodiment of the water-drawing device, the scoop assembly also includes a metering liquid guide cylinder, and the scoop is provided with a first flow channel for conveying the liquid medium;

[0013] The scoops are arranged in multiple groups along the circumference of the quantitative liquid guiding cylinder, and the first flow channel in all the scoops is connected to the second flow channel in the quantitative liquid guiding cylinder.

[0014] In this design, the addition of a quantitative liquid guiding cylinder and a first flow channel within the scoop assembly optimizes the liquid medium's transport path, ensuring orderly flow and enhancing stability and accuracy. Multiple scoops arranged in a circular array along the circumference of the quantitative liquid guiding cylinder, with their first flow channels connected to the second flow channel of the cylinder, allow the scoops to work alternately as they rotate under servo motor drive. This ensures a continuous flow of liquid medium from the container to subsequent flow channels, providing a consistent supply of quantitative liquid medium to the next process equipment. This significantly improves transport efficiency and effectively guarantees the efficient and stable operation of the device in quantitative liquid medium transport, meeting the stringent requirements of experiments for liquid medium supply.

[0015] As a further embodiment of the water-drawing device, the scoop includes a first roll plate and a second roll plate, which are mutually enclosed to form a volute-shaped first flow channel.

[0016] In this design, the scoop bucket is formed by a first and second rolled plate enclosing a spiral-shaped first flow channel. This spiral structure optimizes the liquid flow characteristics, enabling the liquid medium to form a stable laminar flow within the scoop bucket, reducing resistance, minimizing liquid splashing and pressure fluctuations, ensuring smooth delivery, and facilitating accurate metering. Simultaneously, this design improves scooping and conveying efficiency. During scooping, the inlet effectively captures the liquid, and during rotation, centrifugal force and gravity guide the liquid medium to flow evenly towards the outlet, preventing accumulation and stagnation, and precisely controlling the delivery volume. Furthermore, its structure enhances adaptability and reliability, possessing a certain degree of strength and stability, capable of withstanding impacts and stresses, and not easily deformed or damaged, ensuring the stability of the flow channel shape.

[0017] As a further embodiment of the water pump, the axial cross-sectional shape of the first flow channel is at least half a circular arc, and the extension line of the inlet profile of the first flow channel passes through its own center.

[0018] In this design, the axial cross-sectional shape of the first flow channel is at least half a circular arc, and the extended line of the inlet profile passes through its own center. This allows the liquid medium to enter the flow channel more smoothly during the rotation of the scoop, reducing liquid flow resistance and improving scooping efficiency. At the same time, it ensures that the volume of liquid scooped each time is relatively stable, which is conducive to accurate measurement and thus ensures the accuracy of the liquid medium delivery, further improving the performance of the entire water pump in terms of quantitative liquid medium delivery.

[0019] As a further embodiment of the water-drawing device, the scoop assembly also includes a liquid guide wheel, which is connected to the outlet of the second flow channel. The liquid guide wheel rotates synchronously with the metering liquid guide cylinder to guide the flow direction of the liquid medium.

[0020] In this design, a guide wheel is added to the hopper assembly, and it is connected to the outlet of the second flow channel and rotates synchronously with the metering guide cylinder, effectively guiding the flow direction of the liquid medium. As the liquid medium flows out of the second flow channel of the metering guide cylinder, the rotation of the guide wheel ensures that the liquid medium enters subsequent process equipment in a more reasonable flow direction, avoiding unstable flow conditions such as flow deviation and splashing, making the liquid medium delivery more stable and orderly. This not only improves the accuracy and stability of liquid medium delivery and reduces metering errors that may be caused by uncontrolled flow direction, but also helps to improve the overall efficiency of the device by optimizing the liquid flow path.

[0021] As a further embodiment of the water-drawing device, the scoop also includes a first connecting plate, a second connecting plate, and a third connecting plate. The first connecting plate, the second connecting plate, and the third connecting plate enclose a transition channel with a rectangular cross-section at the outlet of the first flow channel. The first flow channel is connected to the second flow channel through the transition channel.

[0022] In this design, the first, second, and third connecting plates in the scoop form a rectangular cross-section transition channel at the outlet of the first flow channel, thus connecting the first and second flow channels. This rectangular cross-section transition channel buffers and stabilizes the liquid flow. When the liquid medium flows from the first flow channel into the transition channel, its velocity and direction are effectively adjusted, reducing turbulence and pressure fluctuations caused by changes in channel shape, allowing the liquid to enter the second flow channel more smoothly. This structural design optimizes the liquid transfer process between the scoop and the metering cylinder, improving the efficiency and stability of liquid delivery and further ensuring the accuracy of quantitative liquid delivery.

[0023] As a further embodiment of the water pump, the housing is also provided with an overflow return port for maintaining a constant liquid level and an inlet port for supplying liquid medium to the housing.

[0024] As a further embodiment of the water pump, a level gauge is provided at the top and bottom of the housing, and the level gauge is electrically connected to the overflow return pipe and the feed pipe, respectively.

[0025] In this design, level gauges are installed at both the top and bottom of the tank, and are electrically connected to the overflow return pipe and the feed pipe, respectively, forming a precise level monitoring and control system. The top level gauge monitors the liquid level in the upper part of the tank in real time. When the liquid level is too high, it sends a signal to open the overflow return pipe, allowing excess liquid to flow back. This ensures that the liquid level in the upper part of the tank is always within a safe and appropriate range, preventing liquid overflow that could cause safety hazards or affect the normal operation of the device. The bottom level gauge mainly monitors the liquid level at the bottom of the tank. When the liquid level is too low, it sends a signal to the feed pipe to replenish the liquid in time, ensuring that the scoop can always scoop up liquid and maintain the continuous and stable operation of the device.

[0026] As a further embodiment of the water pump, the top of the housing is also connected to a feeding port for adjusting the concentration of the liquid medium.

[0027] As a further embodiment of the water pump, a top cover is provided at the top of the housing, and the top cover is connected to the housing by bolts.

[0028] In this design, a bolted top cover is installed at the top of the chamber to facilitate operation and maintenance during device operation. Firstly, the removable top cover allows operators to open the chamber in real time for direct observation of the internal conditions, including the liquid level, the scoop, and the working status of each component, enabling timely detection of potential problems. Secondly, when sampling and analysis of the liquid solution is required, the top cover can be easily opened to obtain the sample, ensuring timely monitoring of the liquid solution's quality and providing data support for precise experimental control.

[0029] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0030] 1. This utility model adopts a closed-loop control method of servo motor driving scoop bucket combined with control system, which can adjust the motor speed in real time and accurately according to the actual flow requirements, ensuring high-precision measurement of liquid medium delivery, effectively overcoming the problem of insufficient measurement accuracy of traditional metering pumps, and can control the concentration of liquid medium solution within the strict range required in chemical experiments, greatly improving the accuracy of the experiment.

[0031] 2. The quantitative liquid guiding cylinder, multiple sets of scoops and their multi-channel structure in the scoop assembly of this utility model optimize the liquid medium conveying path, improve the scooping and conveying efficiency, make the liquid medium flow more smoothly and orderly in the device, and ensure the accuracy and efficiency of quantitative conveying. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a cross-sectional view of the scoop.

[0035] Figure 3 This is a cross-sectional view of the scoop assembly.

[0036] The attached diagram shows the markings and corresponding component names:

[0037] 1-Drive device, 2-Rotating shaft, 3-Guide wheel, 4-Quantitative guide cylinder, 5-Scooping bucket, 6-Drainage port, 7-Box body, 8-Discharge port, 9-Overflow return port, 10-Inlet port, 11-Level gauge, 12-Feeding port, 13-First connecting plate, 14-Second connecting plate, 15-Third connecting plate, 16-First flow channel, 17-First roll plate, 18-Second roll plate, 19-Second flow channel. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0039] Example 1

[0040] This embodiment 1 provides a water pump for quantitative delivery of liquid media, such as... Figures 1-3 As shown, it includes a drive unit 1 and a scoop assembly. The scoop assembly is located in the housing 7 and is driven by the drive unit 1 to rotate around its own axis, quantitatively discharging the liquid medium in the housing 7 to the next process equipment.

[0041] Among them, such as Figure 1 As shown, the drive unit 1 includes a servo motor, which is fixed to the motor mounting base by bolts. The motor output shaft is connected to the rotating shaft 2. The rotating shaft 2 is fixed to the housing 7 by means of a bearing cover, a bearing seat and an outer sealing assembly to ensure the stability and sealing of the rotation.

[0042] Among them, such as Figure 1 As shown, the scoop assembly is located in the housing 7, and includes a metering liquid guide cylinder 4, a scoop 5, and a guide wheel 3. The metering liquid guide cylinder 4 is connected to the rotating shaft 2 and rotates synchronously with the rotating shaft 2, while six sets of scoops 5 are arranged in a circular array along the circumference of the metering liquid guide cylinder 4. The guide wheel 3 is connected to the metering liquid guide cylinder 4 by a key to achieve synchronous rotation; specifically, as shown... Figure 2 and Figure 3 As shown, the scoop 5 is formed by welding the first roll plate 17 and the second roll plate 18 together to form a spiral-shaped first flow channel 16. The axial cross-sectional shape of the first flow channel 16 is at least 1 / 2 of a circular arc, and the extension line of the inlet profile of the first flow channel 16 passes through its own center, so that the fluid volume inside the scoop 5 is always quantitative to ensure the accuracy of measurement. At the outlet of the first flow channel 16, there is a transition flow channel with a rectangular cross-section formed by welding the first connecting plate 13, the second connecting plate 14 and the third connecting plate 15 together. The cross-sectional area of ​​the transition flow channel is gradually expanding to expand the flow path. All the first flow channels 16 in the scoop 5 are connected to the second flow channel 19 in the quantitative liquid guide cylinder 4 through the transition flow channel, and the liquid guide wheel 3 is connected to the outlet of the second flow channel 19 to guide the liquid medium to flow to the discharge pipe 8.

[0043] When the water pump is working, the servo motor drives the scoop 5 to make circular motion in the housing 7. The servo motor is connected to the control system. The speed of the servo motor can be manually adjusted according to the required flow rate on site, thereby adjusting the test calibration flow rate at any time. Specifically, if the flow rate in the channel is lower than the required value, the control system increases the speed of the servo motor to speed up the movement frequency of the scoop, thereby increasing the amount of liquid medium conveyed. Conversely, if the flow rate is too high, the speed is reduced to reduce the amount of liquid conveyed, thereby achieving the purpose of quantitative conveying of liquid medium and flow rate regulation.

[0044] Example 2

[0045] This embodiment 2 provides a water pump for quantitative delivery of liquid media based on the solution of embodiment 1, such as... Figures 1-3 As shown, the aforementioned tank 7 is also equipped with an overflow return pipe 9 for maintaining a constant liquid level and a feed pipe 10 for supplying liquid medium to the tank. At the same time, a level gauge 11 is installed at the top and bottom of the tank 7. The level gauge 11 is electrically connected to the overflow return pipe 9 and the feed pipe 10, respectively. When the liquid level in the tank 7 is too high, the level gauge 11 can promptly provide a feedback signal to control the overflow return pipe 9 to open, so that the excess liquid medium can flow back, thereby ensuring that the liquid level in the tank 7 is always within a safe and appropriate range.

[0046] In this embodiment, the top of the housing 7 is also connected to a feed port 12 for adjusting the concentration of the liquid medium.

[0047] In this embodiment, a bolted top cover is provided at the top of the housing 7 to facilitate operation and maintenance during device operation. The detachable top cover allows operators to open the housing 7 in real time and directly observe the internal conditions.

[0048] Meanwhile, in some embodiments, the scoop assembly also includes a flow sensor located in the liquid medium flow channel. A servo motor drives the scoop 5 to perform circular motion in the housing 7, and the servo motor is connected to the control system. The control system adjusts the speed of the servo motor based on the feedback data from the flow sensor. Here, the control system compares the received flow data with the set value. If the actual flow is lower than the set value, the control system increases the speed of the servo motor and speeds up the movement frequency of the scoop 5, thereby increasing the amount of liquid medium scooped and conveyed. If the actual flow is higher than the set value, the servo motor speed is reduced to decrease the amount of liquid medium conveyed until the actual flow stabilizes near the set value, thereby achieving more precise quantitative conveying and flow regulation of the liquid medium.

[0049] The operating procedure for this device is as follows:

[0050] The servo motor is started, driving the rotating shaft 2 to rotate, thereby causing the metering liquid guide cylinder 4 and the liquid guide wheel 3 to rotate synchronously, which in turn drives the scoop 5 to perform a circular motion around the rotating shaft 2. When the scoop 5 rotates to its lowest point, the liquid medium smoothly enters the first flow channel of the scoop 5 under the action of centrifugal force. As the scoop 5 rotates and rises, the liquid medium is subjected to the combined action of centrifugal force and gravity in the volute-shaped first flow channel 16, flowing along the flow channel towards the outlet, and entering the second flow channel 19 of the metering liquid guide cylinder 4 through the rectangular cross-section transition flow channel. During this process, the flow sensor monitors the flow rate of the liquid medium in real time and transmits the flow data to the control system (here, the actual flow condition can also be manually confirmed and the speed of the servo motor can be directly adjusted).

[0051] Assuming the required liquid medium flow rate for the experiment is 15 L / h, the control system compares the received flow rate data with the set value. If the actual flow rate is lower than 15 L / h, the control system increases the speed of the servo motor and accelerates the movement frequency of the scoop 5, thereby increasing the amount of liquid medium scooped and conveyed. If the actual flow rate is higher than 15 L / h, the servo motor speed is reduced, decreasing the liquid medium conveying volume until the actual flow rate stabilizes near the set value. The liquid medium flowing out from the second flow channel 19 enters the guide wheel 3, which guides the liquid medium smoothly from the discharge port 8 to the next process equipment.

[0052] During the operation of the device, the top level gauge 11 monitors the liquid level at the top of the tank in real time. When the liquid level reaches the set upper limit, the level gauge sends a signal to the control valve of the overflow return pipe 9 to open the valve, allowing the excess liquid medium to flow back to the storage tank or other designated container, thus maintaining the stability of the liquid level at the top of the tank 7. The bottom level gauge monitors the liquid level at the bottom of the tank. When the liquid level is lower than the set lower limit, it sends a signal to the control valve of the feed pipe 10 to open the valve to replenish the liquid medium, ensuring that the scoop 5 can normally scoop the liquid medium and maintain the continuous and stable operation of the device.

[0053] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dipper for the dosed delivery of a liquid medium, characterized in that The utility model relates to a kind of liquid medium metering device, including: Drive device (1); Bucket assembly, the bucket assembly is located in tank (7) and is driven around self axis rotation by the drive device (1), and liquid medium in the tank (7) is metered to next process equipment; Wherein, the drive device (1) includes servo motor, the bucket assembly includes ladle (5), the servo motor drives the ladle (5) to make circumferential motion in the tank (7), and the servo motor is connected with control system, and the control system adjusts servo motor speed according to actual flow feedback data.

2. A dipper according to claim 1 for the dosed delivery of a liquid medium, characterized in that The bucket assembly further includes metering liquid guide cylinder (4), and the first flow channel (16) for conveying liquid medium is arranged in the ladle (5); The ladle (5) is arrayed along the circumference of the metering liquid guide cylinder (4) in multiple groups, and the first flow channel (16) in all the ladles (5) is communicated with the second flow channel (19) in the metering liquid guide cylinder (4).

3. A dipper for the metered delivery of a liquid medium according to claim 2, characterised in that, The ladle (5) includes first winding plate (17) and second winding plate (18), and the first winding plate (17) and the second winding plate (18) are mutually enclosed to form the first flow channel (16) in the shape of snail.

4. A dipper according to claim 3, characterised in that, The axial section shape of the first flow channel (16) is at least 1 / 2 circular arc, and the inlet profile extension line of the first flow channel (16) passes through its own center.

5. A dipper according to claim 4, characterised in that, The bucket assembly further includes liquid guide wheel (3), and the liquid guide wheel (3) is communicated with the outlet of the second flow channel (19), and the liquid guide wheel (3) rotates synchronously with the metering liquid guide cylinder (4) to guide the flow direction of liquid medium.

6. A dipper for the metered delivery of a liquid medium according to claim 5, characterised in that, The ladle (5) further includes first connecting plate (13), second connecting plate (14) and third connecting plate (15), and the first connecting plate (13), the second connecting plate (14) and the third connecting plate (15) are enclosed to form the transition flow channel of rectangular section at the outlet of the first flow channel (16), and the first flow channel (16) is communicated with the second flow channel (19) through the transition flow channel.

7. A dipper for the dosed delivery of a liquid medium according to any one of claims 1 to 6, characterized in that The tank (7) is further provided with overflow backflow pipe orifice (9) for keeping constant liquid level and feed pipe orifice (10) for conveying liquid medium to the tank (7).

8. A dipper for the metered delivery of a liquid medium according to claim 7, characterised in that The top end and the bottom end of the tank (7) are each provided with liquid level meter (11), and the liquid level meter (11) is electrically connected with the overflow backflow pipe orifice (9) and the feed pipe orifice (10) respectively.

9. A dipper for the metered delivery of a liquid medium according to claim 7, characterised in that, The top end of the tank (7) is further connected with feeding port (12) for adjusting the concentration of liquid medium.

10. A dipper for the metered delivery of a liquid medium according to claim 7, wherein, The top end of the tank (7) is provided with top cover, and the top cover is connected with the tank (7) by bolt.

Images