Negative pressure liquid transfer device with filtering function and conductivity detection module

Abstract

The utility model discloses a negative pressure liquid transfer device with a filtering function and a conductivity detection module, which relates to the technical field of liquid transfer and comprises a box for liquid to be taken and a negative pressure storage bag arranged on the right side of the box for liquid to be taken. A first liquid taking pipe and a conductivity detector are arranged on the left side and the right side of the upper portion of the negative pressure storage bag correspondingly, a connecting pipe is installed at the lower end of the negative pressure storage bag, a control valve is installed on the connecting pipe, and a liquid outlet pipe is arranged at the lower end of the connecting pipe; a negative pressure ball is installed at the left end of the first liquid taking pipe, a second liquid taking pipe is installed at the left end of the negative pressure ball, and a liquid taking head is installed at the lower end of the second liquid taking pipe. According to the negative pressure liquid transfer device with the filtering function and the conductivity detection module, the filter membrane assembly can intercept large solid particles, and impurities are prevented from blocking a pipeline; the conductivity detector feeds back the liquid ion concentration in real time, data support is provided for process regulation and control, and the accuracy of production and experiments is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid transfer technology, specifically a negative pressure liquid transfer device with filtration function and conductivity detection module. Background Technology

[0002] Negative pressure liquid transfer operations are very common in industries such as biomedicine, chemical experiments, and food and beverage, and are frequently used in sample collection, solution dispensing, and waste liquid treatment. The conductivity of a liquid, as a key indicator reflecting its ion concentration, is crucial for many experimental and production processes. For example, in water quality monitoring, battery electrolyte preparation, and chemical synthesis reactions, the liquid conductivity directly affects the reaction progress and product performance.

[0003] For example, Chinese utility model patent application number 202322466000.8 discloses a negative pressure micro-liquid suction device. It has a simple structure, is easy to use, and is safe and reliable. Water flows into the connecting pipe, and when it flows through the oxygen diffuser, a pressure difference is created between the outside and inside of the oxygen diffuser. Utilizing the negative pressure created by the water flow, the suction hose generates suction. The pipette tip is inserted into the EP tube to draw up the supernatant. This supernatant is then transported to the oxygen diffuser through the suction hose. The supernatant and water are discharged through the drain hose to the sink and into a dedicated sewer system, preventing harm to the human body. However, this device still has certain shortcomings.

[0004] When transferring liquids under negative pressure, it is impossible to filter the liquid to be transferred, and it is also impossible to detect the conductivity of the liquid. This not only easily leads to solid impurities clogging the pipeline and wearing down the internal components of the equipment, reducing the service life of the device and the transfer efficiency, but also makes it difficult for operators to control changes in the liquid composition, making it difficult to meet the requirements of modern industrial production and scientific research for the precision and intelligence of the liquid transfer process.

[0005] Therefore, we propose a negative pressure liquid transfer device with filtration function and conductivity detection module to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a negative pressure liquid transfer device with filtration function and conductivity detection module, in order to solve the problems mentioned in the background art. Currently, when transferring liquids under negative pressure, the device cannot filter the liquid to be transferred, nor can it detect the conductivity of the liquid. This not only easily leads to solid impurities clogging the pipeline, wearing down the internal components of the equipment, reducing the service life and transfer efficiency of the device, but also makes it difficult for operators to control changes in liquid composition, making it difficult to meet the requirements of modern industrial production and scientific research for a refined and intelligent liquid transfer process.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure liquid transfer device with filtration function and conductivity detection module, comprising a liquid collection box and a negative pressure storage bag, wherein a negative pressure storage bag is provided on the right side of the liquid collection box, a first liquid collection tube and a conductivity detector are respectively provided on the upper left and right sides of the negative pressure storage bag, and a connecting pipe is installed at the lower end of the negative pressure storage bag, a control valve is installed on the connecting pipe, and a liquid outlet tube is provided at the lower end of the connecting pipe;

[0008] A negative pressure bulb is installed at the left end of the first liquid collection tube, and a second liquid collection tube is installed at the left end of the negative pressure bulb. A liquid collection head is installed at the lower end of the second liquid collection tube, and a filter membrane assembly is installed on the lower surface of the liquid collection head through a connecting assembly.

[0009] Preferably, a sealing plug is installed at the upper end of the negative pressure storage bag, the sealing plug is detachably connected to the negative pressure storage bag, the first liquid extraction tube and the conductivity meter pass through the sealing plug, and both the first liquid extraction tube and the conductivity meter are plugged into and detached from the sealing plug.

[0010] The above-mentioned structural design, with its detachable sealing plug and negative pressure storage bag, facilitates quick assembly and disassembly of the first liquid collection tube and conductivity meter, meeting the needs of pipeline replacement and equipment maintenance in different scenarios and improving operational flexibility.

[0011] Preferably, the lower end of the conductivity detector is provided with a conductivity detection probe, which is located inside the negative pressure storage bag.

[0012] With the above structural design, the conductivity meter's probe is built-in, which can monitor the changes in ion concentration of the liquid in the negative pressure storage bag in real time, providing instant data support for liquid composition determination and avoiding process deviations or experimental errors caused by composition fluctuations.

[0013] Preferably, a first check valve is installed on the outlet pipe, and a sealing ring is installed at the upper end of the outlet pipe, with the sealing ring being detachably connected to the lower end of the connecting pipe.

[0014] The above structural design, with the combination of the first check valve and the sealing ring, ensures unidirectional liquid flow during dispensing, preventing backflow and contamination of the liquid in the negative pressure storage bag. At the same time, the detachable connection of the sealing ring facilitates the cleaning and replacement of the dispensing pipe, maintaining the hygiene of the device.

[0015] Preferably, a second check valve is installed on the first liquid collection tube, and the lower end of the second liquid collection tube is located inside the liquid collection box.

[0016] With the above structural design, the second check valve prevents the liquid from flowing back to the liquid collection box during liquid collection. Combined with the controllable negative pressure of the negative pressure ball, it enables precise quantitative liquid collection, avoiding liquid waste or cross-contamination, and is suitable for micro-liquid transfer scenarios.

[0017] Preferably, the connecting assembly includes a groove and a limiting bolt, and grooves are provided on both the left and right sides of the lower surface of the liquid-taking head, and limiting bolts are installed on both the left and right sides of the liquid-taking head.

[0018] The above structural design, with its connection between the groove and the limiting bolt, allows for tool-free assembly and disassembly of the filter membrane assembly, enabling rapid replacement and significantly improving maintenance efficiency.

[0019] Preferably, the limiting bolt is detachably connected to the liquid taking head, the limiting bolt is located below the groove, and limiting blocks are installed on both the left and right sides of the filter membrane assembly, with the limiting blocks engaging with the groove.

[0020] The above structural design, with the snap-fit ​​structure between the limiting block and the groove, combined with the locking function of the limiting bolt, ensures that the filter membrane assembly is installed firmly and avoids it from falling off due to vibration during the transfer process.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the negative pressure liquid transfer device with filtration function and conductivity detection module:

[0022] 1. Filtration and Precision Detection: The filter membrane module can intercept larger solid particles, preventing impurities from clogging the pipeline; the conductivity meter provides real-time feedback on the liquid ion concentration, providing data support for process control and improving the accuracy of production and experimentation;

[0023] 2. Convenient maintenance and stable structure: The filter membrane assembly can be quickly disassembled and assembled using limit bolts, enabling rapid replacement of the filter membrane assembly;

[0024] 3. Controllable negative pressure and anti-backflow design: The negative pressure ball, together with the first and second check valves, ensures unidirectional liquid flow and prevents backflow contamination; the capacity of the negative pressure storage bag can be customized to meet different transfer needs, and the sealing plug can be quickly cleaned and replaced to avoid cross-contamination. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention during liquid extraction;

[0026] Figure 2 This is a schematic diagram of the structure of the present invention during liquid discharge;

[0027] Figure 3 This is a schematic diagram showing the position and structure of the first and second liquid extraction tubes of this utility model.

[0028] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the structure of the filter membrane assembly of this utility model during disassembly.

[0030] In the diagram: 1. Liquid collection box; 2. Negative pressure storage bag; 3. Sealing plug; 4. First liquid collection tube; 5. Conductivity meter; 6. Connecting tube; 7. Control valve; 8. Discharge tube; 9. First check valve; 10. Sealing ring; 11. Second check valve; 12. Negative pressure ball; 13. Second liquid collection tube; 14. Liquid collection head; 15. Groove; 16. Limiting bolt; 17. Filter membrane assembly; 18. Limiting block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-5This utility model provides a technical solution: a negative pressure liquid transfer device with filtration function and conductivity detection module, including a liquid collection box 1, a negative pressure storage bag 2, a sealing plug 3, a first liquid collection tube 4, a conductivity detector 5, a connecting pipe 6, a control valve 7, a liquid outlet pipe 8, a first check valve 9, a sealing ring 10, a second check valve 11, a negative pressure ball 12, a second liquid collection tube 13, a liquid collection head 14, a groove 15, a limiting bolt 16, a filter membrane assembly 17, and a limiting block 18. A negative pressure storage bag 2 is provided on the right side of the liquid collection box 1. The negative pressure storage bag 2 has a first liquid extraction tube 4 and a conductivity meter 5 respectively installed on its upper left and right sides. A sealing plug 3 is installed at the upper end of the negative pressure storage bag 2, and the sealing plug 3 is detachably connected to the negative pressure storage bag 2. The first liquid extraction tube 4 and the conductivity meter 5 pass through the sealing plug 3, and both are plugged into and detached from the sealing plug 3. These connections allow for easy removal of the first liquid extraction tube 4 and the conductivity meter 5 from the sealing plug 3 on the negative pressure storage bag 2. A conductivity detection probe is installed at the lower end of the conductivity meter 5, and the conductivity detection probe is located within the negative pressure storage bag. Inside the negative pressure storage bag 2, the conductivity meter 5 detects the liquid conductivity in real time through the conductivity detection probe below, and the data is displayed on the device terminal. A connecting pipe 6 is installed at the lower end of the negative pressure storage bag 2, and a control valve 7 is installed on the connecting pipe 6. An outlet pipe 8 is provided at the lower end of the connecting pipe 6, and a first check valve 9 is installed on the outlet pipe 8. A sealing ring 10 is installed at the upper end of the outlet pipe 8, and the sealing ring 10 is detachably connected to the lower end of the connecting pipe 6. When taking liquid, the control valve 7 on the connecting pipe 6 is closed; when liquid taking is complete and liquid needs to be discharged, the outlet pipe 8 is opened. The sealing ring 10 is sealed to the connecting pipe 6, and then the control valve 7 is opened. The liquid in the negative pressure storage bag 2 is discharged through the connecting pipe 6 and the outlet pipe 8. The first check valve 9 prevents the liquid from flowing back during discharge. The first liquid taking pipe 4 is equipped with a second check valve 11. The lower end of the second liquid taking pipe 13 is located inside the liquid taking box 1. The negative pressure ball 12 is squeezed to expel air. After releasing, a negative pressure is formed. The liquid in the liquid taking box 1 is filtered through the second liquid taking pipe 13 and the filter membrane assembly 17 and then enters the first liquid taking pipe 4. It flows into the negative pressure storage bag 2 through the second check valve 11.

[0033] A negative pressure ball 12 is installed at the left end of the first liquid collection tube 4, and a second liquid collection tube 13 is installed at the left end of the negative pressure ball 12. A liquid collection head 14 is installed at the lower end of the second liquid collection tube 13, and a filter membrane assembly 17 is installed on the lower surface of the liquid collection head 14 through a connecting assembly. The connecting assembly includes a groove 15 and a limiting bolt 16. Grooves 15 are provided on both the left and right sides of the lower surface of the liquid collection head 14, and limiting bolts 16 are installed on both the left and right sides of the liquid collection head 14. When it is necessary to replace the filter membrane assembly 17, the limiting bolts 16 are rotated to move the limiting bolts 16 on the left and right sides away from the limiting blocks on the filter membrane assembly 17. 18. By releasing the limiting block 18, the filter membrane assembly 17 can be removed. The limiting bolt 16 is detachably connected to the liquid taking head 14. The limiting bolt 16 is located below the groove 15. Limiting blocks 18 are installed on both the left and right sides of the filter membrane assembly 17. The limiting blocks 18 are engaged with the groove 15. When installing the filter membrane assembly 17, the filter membrane assembly 17 of the liquid taking head 14 is inserted into the groove 15 through the limiting block 18. The limiting bolt 16 is rotated to move the limiting bolt 16 towards the limiting block 18. The limiting bolt 16 limits the limiting block 18, thereby completing the installation of the filter membrane assembly 17.

[0034] It should be noted that the conductivity meter 5, control valve 7, first check valve 9 and second check valve 11 in this application all have corresponding accessories in the field, and the staff can choose according to the actual situation. Therefore, their internal structure and working principle will not be described in detail.

[0035] Working principle: When using this negative pressure liquid transfer device with filtration function and conductivity detection module, firstly, when taking liquid, close the control valve 7 on the connecting pipe 6, squeeze the negative pressure ball 12 to expel air, and after releasing it, a negative pressure is formed. The liquid in the liquid taking box 1 enters the first liquid taking pipe 4 after being filtered through the second liquid taking pipe 13 and the filter membrane assembly 17, and flows into the negative pressure storage bag 2 through the second check valve 11. The conductivity detector 5 detects the conductivity of the liquid in the negative pressure storage bag 2 in real time through the conductivity detection probe below, and the data is displayed on the device terminal. When liquid taking is completed and liquid needs to be discharged, the liquid discharge pipe 8 is sealed to the connecting pipe 6 through the sealing ring 10, and then the control valve 7 is opened. The liquid in the negative pressure storage bag 2 is discharged through the connecting pipe 6 and the liquid discharge pipe 8. The first check valve 9 prevents the liquid from flowing back during discharge.

[0036] When the filter membrane assembly 17 needs to be replaced, rotate the limiting bolts 16 to move the limiting bolts 16 on both sides away from the limiting blocks 18 on the filter membrane assembly 17, thereby releasing the limiting blocks 18 and allowing the filter membrane assembly 17 to be removed. When installing the filter membrane assembly 17, insert the filter membrane assembly 17 of the liquid sampling head 14 into the groove 15 via the limiting blocks 18, rotate the limiting bolts 16 to move them towards the limiting blocks 18, thereby limiting the limiting blocks 18 and completing the installation of the filter membrane assembly 17. This completes a series of steps. Content not described in detail in this specification is prior art known to those skilled in the art.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure liquid transfer device with filtration function and conductivity detection module, comprising a liquid collection box (1) and a negative pressure storage bag (2), wherein the negative pressure storage bag (2) is disposed on the right side of the liquid collection box (1), characterized in that: The negative pressure storage bag (2) is provided with a first liquid extraction tube (4) and a conductivity detector (5) on the upper left and right sides respectively, and a connecting tube (6) is installed at the lower end of the negative pressure storage bag (2). A control valve (7) is installed on the connecting tube (6), and a liquid outlet tube (8) is provided at the lower end of the connecting tube (6). A negative pressure ball (12) is installed at the left end of the first liquid collection tube (4), and a second liquid collection tube (13) is installed at the left end of the negative pressure ball (12). A liquid collection head (14) is installed at the lower end of the second liquid collection tube (13), and a filter membrane assembly (17) is installed on the lower surface of the liquid collection head (14) through a connecting assembly.

2. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 1, characterized in that: The upper end of the negative pressure storage bag (2) is equipped with a sealing plug (3), which is detachably connected to the negative pressure storage bag (2). The first liquid extraction tube (4) and the conductivity meter (5) pass through the sealing plug (3), and both the first liquid extraction tube (4) and the conductivity meter (5) are plugged into and detached from the sealing plug (3).

3. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 2, characterized in that: The lower end of the conductivity meter (5) is equipped with a conductivity detection probe, which is located inside the negative pressure storage bag (2).

4. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 1, characterized in that: A first check valve (9) is installed on the outlet pipe (8), and a sealing ring (10) is installed at the upper end of the outlet pipe (8). The sealing ring (10) is detachably connected to the lower end of the connecting pipe (6).

5. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 1, characterized in that: A second check valve (11) is installed on the first liquid collection tube (4), and the lower end of the second liquid collection tube (13) is located inside the liquid collection box (1).

6. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 1, characterized in that: The connecting assembly includes a groove (15) and a limiting bolt (16). The lower surface of the liquid taking head (14) is provided with grooves (15) on both the left and right sides, and the liquid taking head (14) is provided with limiting bolts (16) on both the left and right sides.

7. The negative pressure liquid transfer device with filtration function and conductivity detection module according to claim 6, characterized in that: The limiting bolt (16) is detachably connected to the liquid taking head (14). The limiting bolt (16) is located below the groove (15). Limiting blocks (18) are installed on both the left and right sides of the filter membrane assembly (17). The limiting blocks (18) are engaged with the groove (15).

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