Multi-channel liquid distribution device

Abstract

The utility model provides a multi-channel liquid distribution device. The multi-channel liquid distribution device comprises a valve assembly, a rack sliding assembly, a transmission mechanism and a fixed supporting structure, the device is compact in structure, easy and convenient to manufacture and suitable for aqueous liquid and organic solvents, has high automation control capacity, and ensures reliability and stability in different application scenes. Through the combination of the motor and the control system, the device can automatically control the opening and closing of each passage according to a preset program; and meanwhile, equal-time or unequal-time opening and closing of each independent valve assembly are flexibly controlled, so that equal-amount or differential-amount distribution of different liquids is realized. The device is suitable for the fields of laboratories, medical laboratories, multi-channel liquid distribution control, fluid transmission systems, biological tissue automatic dehydrators and the like.

Description

Technical Field

[0001] The utility model relates to the field of liquid and reagent dispensing, in particular to a multi-channel liquid dispensing device, which is especially applicable to the fields of laboratories, medical laboratories, multi-channel liquid dispensing control systems, fluid transmission systems, automatic tissue dehydrators, etc. Background Art

[0002] In modern laboratories and fluid control systems, liquid dispensing equipment needs to have high precision, reliability and stability. Traditional multi-channel liquid dispensing devices mostly adopt a concentric disc structure, and channel switching is carried out by rotating the disc. However, this design has extremely high requirements for manufacturing precision and sealing, and often has problems of air leakage and liquid leakage due to wear or aging, especially it is difficult to meet the sealing requirements of solvents such as alcohol and xylene. Therefore, there is an urgent need for a device with higher automation and stability to solve the defects in the prior art. Summary of the Invention

[0003] The utility model provides a multi-channel liquid dispensing device, which has the advantages of simple manufacturing, high automation degree and applicability to various liquids. The device can realize precise control of multi-channel liquid through an independent valve assembly cooperating with a rack sliding assembly, effectively prevent liquid overflow and liquid cross-flow, and ensure its reliability and stability in different applications.

[0004] The technical solution of the utility model is as follows:

[0005] A multi-channel liquid dispensing device includes a valve assembly, a rack sliding assembly, a transmission mechanism and a fixed support structure.

[0006] Preferably, the valve assembly includes a valve body, a valve pipe interface, a valve switch shaft and a gear.

[0007] Preferably, the rack sliding assembly includes an upper rack, a lower rack, a rack fixing part, a fixed screw hole and a transmission fixing block.

[0008] Preferably, the transmission mechanism includes a transmission belt, a transmission wheel, a motor, a motor fixing part, a transmission wheel fixing part, a slide rail and a slider.

[0009] Preferably, the fixed support structure includes a support plate, a rack fixing part, a fixed screw hole, a transmission fixing block, a motor fixing part and a transmission wheel fixing part; the valve assembly is fixed on the support plate in a predetermined arrangement manner; the rack sliding assembly is installed on the support plate through the slide rail and the slider, and is arranged in parallel with the valve assembly; the gear of the valve assembly meshes with the upper and lower racks of the rack sliding assembly, and the rack sliding assembly is driven by a transmission belt of the motor to move parallel along the slide rail to the positions of each valve assembly; the upper and lower offset racks drive the gear to rotate, driving the valve switch shaft to realize forward and reverse rotation of a partial circumference, thereby controlling the opening and closing of the valve.

[0010] Preferably, the rack sliding assembly moves on the slide rail through a transmission belt or a lead screw driven by a motor.

[0011] Preferably, the number of teeth meshed between the gear of the valve assembly and the upper and lower racks of the rack sliding assembly determines the rotation angle of the gear. With the same number of teeth on the upper and lower racks, equal-angle rotation in both forward and reverse directions of the gear is achieved, thereby realizing precise control of the opening and closing of the valve.

[0012] Preferably, the motor is controlled by a control system, enabling the device to automatically control the opening and closing of each valve according to a predetermined program; by controlling the switching timings of each independent valve assembly, equal or differential distribution of different liquids is achieved.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] The present utility model has a compact structure and is easy to manufacture. It is applicable to multi-channel liquid distribution devices for aqueous liquids and organic solvents, has a high degree of automatic control ability, and ensures reliability and stability in different application scenarios.

[0015] 1. Multi-channel precise control: The device adopts an independent valve assembly design, with each valve assembly corresponding to one kind of liquid. Depending on the movement of the rack sliding assembly, the opening and closing of each valve assembly are precisely controlled, preventing liquid overflow, leakage, or liquid cross-flow, and is particularly suitable for multi-channel liquid distribution occasions.

[0016] 2. High-precision distribution: Through the precise meshing design of the rack and the gear, the opening and closing angles of each valve are ensured to be accurate, reducing errors in liquid distribution and guaranteeing the distribution accuracy.

[0017] 3. Fully automated operation: The combination of the motor and the control system enables the device to automatically control the opening and closing of each channel according to a preset program; at the same time, by flexibly controlling the equal-time or unequal-time switching of each independent valve assembly, equal or differential distribution of different liquids is achieved.

[0018] 4. Compact design: The overall structure of the device is simple and compact, suitable for application scenarios with limited space such as laboratories, and is convenient for integrated use. Description of the Drawings

[0019] Figure 1 : Three-dimensional structure diagram of the valve assembly and the rack sliding assembly.

[0020] Figure 2 : Plan structure diagram of the valve assembly and the rack sliding assembly.

[0021] Figure 3 : Three-dimensional diagram of the side appearance of the valve body.

[0022] Figure 4: Perspective view of the side appearance of the slide rail.

[0023] Explanation of the reference numerals in the drawings:

[0024] 1. Valve body, 2. Valve pipe interface, 3. Valve switch shaft, 4. Gear, 5. Upper rack, 6. Lower rack, 7. Rack fixing part, 8. Fixed screw hole, 9. Transmission fixing block, 10. Transmission belt, 11. Transmission wheel, 12. Motor, 13. Motor fixing part, 14. Transmission wheel fixing part, 15. Support plate, 16. Slide rail, 17. Slide block, 18. Rack sliding assembly. Detailed implementation manners

[0025] The following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be particularly noted that the description of these implementation manners is only for helping to understand the present utility model and does not limit it. In addition, the technical features in the various embodiments described herein can be combined arbitrarily without conflict.

[0026] Embodiment 1: As Figures 1 to 4 shown, a multi-channel liquid distribution device provided by the present utility model includes a valve assembly, a rack sliding assembly, a transmission mechanism, and a fixed support structure.

[0027] The valve assembly includes a valve body 1, a valve pipe interface 2, a valve switch shaft 3, and a gear 4; the rack sliding assembly includes an upper rack 5, a lower rack 6, a rack fixing part 7, a fixed screw hole 8, and a transmission fixing block 9; the transmission mechanism includes a transmission belt 10, a transmission wheel 11, a motor 12, a motor fixing part 13, a transmission wheel fixing part 14, a slide rail 16, and a slide block 17.

[0028] The fixed support structure includes a rack fixing part 7, a fixed screw hole 8, a transmission fixing block 9, a motor fixing part 13, a transmission wheel fixing part 14, and a support plate 15. The valve assembly is fixed on the support plate 15 in a predetermined arrangement manner; the rack sliding assembly is installed on the support plate 15 through the slide rail 16 and the slide block 17 and is arranged in parallel with the valve assembly; the gear 4 of the valve assembly meshes with the upper and lower racks 5 and 6 of the rack sliding assembly, and the rack sliding assembly is driven by the transmission belt 10 of the motor 12 to move parallel to the slide rail 16 to the positions where each valve assembly is located; by driving the gear 4 to rotate through the upper and lower offset racks 5 and 6, the valve switch shaft 3 is driven to rotate forward and backward in part of a circumference, thereby controlling the opening and closing of the valve.

[0029] Embodiment 2: When in use, the rack sliding assembly moves on the slide rail 16 through a transmission belt 10 or a lead screw driven by a motor 12; the number of teeth meshed between the gear 4 of the valve assembly and the upper and lower racks 5 and 6 of the rack sliding assembly determines the rotation angle of the gear 4. By having the same number of teeth on the upper and lower racks 5 and 6, equal-angle rotation in both forward and reverse directions of the gear 4 is achieved, thereby realizing precise control of the opening and closing of the valve; the motor 12 is controlled by a control system, enabling the device to automatically control the opening and closing of each valve according to a predetermined program; by controlling the switching timings of each independent valve assembly, equal or differential distribution of different liquids is realized.

[0030] Embodiment 3: In an existing biological tissue automatic dehydrator, the tissue processing cylinder and the reagent pot are usually connected by a liquid distribution valve, which is used to sequentially inject the liquids in each reagent cylinder into the processing cylinder. This liquid distribution valve is provided with a plurality of liquid inlet holes arranged in a circular pattern on the valve seat, and there are liquid through holes on the valve core. By rotating the valve core, the liquid through holes are docked with the designated liquid inlet holes, thereby outputting the corresponding liquid. However, since this system distributes multiple liquids (such as alcohol, xylene, liquid paraffin) through the same valve, paraffin is solid at room temperature and needs to be heated and melted, while other reagents are used at room temperature. This will cause paraffin to cool and solidify in the pipeline, forming a wax blockage, affecting the normal operation of the equipment.

[0031] The multi-channel liquid distribution device provided by the present utility model is equipped with an independent valve assembly for each solution (such as alcohol, xylene, liquid paraffin), completely avoiding problems such as liquid overflow, leakage, or cross-flow caused by different liquids passing through the same valve. At the same time, the valve assembly for liquid paraffin is added with a heating function to keep the temperature at 65 °C to prevent paraffin from solidifying and blocking the pipeline at room temperature. This design effectively solves the problem of improper liquid distribution in the existing biological tissue automatic dehydrator, improving the operation efficiency and reliability of the system.

[0032] The basic principles, main features, and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited to the above embodiments, and the embodiments and the description are only used to explain the structure and principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model may have various deformations and improvements, and these deformations and improvements all belong to the protection scope of the present utility model. The protection scope of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A multi-channel liquid distribution device, characterized in that: The device comprises a valve assembly, a rack sliding assembly, a transmission mechanism and a fixed support structure; the valve assembly comprises a valve body, a valve pipe interface, a valve switch shaft and a gear; the rack sliding assembly comprises an upper rack, a lower rack, a rack fixing part, a fixing screw hole and a transmission fixing block; the transmission mechanism comprises a transmission belt, a transmission wheel, a motor, a motor fixing part, a transmission wheel fixing part, a slide rail and a slider; the fixed support structure comprises a support plate, a rack fixing part, a fixing screw hole, a transmission fixing block, a motor fixing part and a transmission wheel fixing part; the valve assembly is fixed on the support plate along a predetermined arrangement; the rack sliding assembly is mounted on the support plate through a slide rail and a slider and is arranged parallel to the valve assembly; the gear of the valve assembly is meshed with the upper and lower racks of the rack sliding assembly, and the transmission belt of the rack sliding assembly driven by the motor moves parallel to the position of each valve assembly along the slide rail; the gear is driven to rotate by the upper and lower offset racks, and the valve switch shaft is driven to realize partial circumferential forward and reverse rotation, thereby controlling the opening and closing of the valve.

2. The multi-channel liquid distribution device according to claim 1, characterized in that: The rack sliding assembly moves on the slide rail through a transmission belt or a lead screw driven by a motor.

3. The multi-channel liquid distribution device according to claim 1, characterized in that: The number of teeth meshing between the gear of the valve assembly and the upper and lower racks of the rack sliding assembly determines the angle of gear rotation. By having the same number of teeth on the upper and lower racks, the gear can rotate in the forward and reverse directions at equal angles, thereby achieving precise control of the opening and closing of the valve.

4. The multi-channel liquid distribution device according to claim 1, characterized in that: The motor is controlled by a control system so that the device automatically controls the opening and closing of each valve according to a predetermined program; by controlling the switching timing of each independent valve assembly, equal or differential distribution of different liquids is achieved.

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