Negative pressure liquid collecting device

Abstract

The utility model discloses a negative pressure liquid collecting device, which relates to the technical field of liquid metering and comprises a support, the support comprises a base plate and two supports, and two ends of one side of the base plate are oppositely and fixedly connected with the two supports; the metering pipe comprises a liquid storage pipe and sealing end covers, and the two ends of the liquid storage pipe are connected with the sealing end covers in a sealed and sleeved mode; the metering pipe is clamped and fixed by two supports, and the upper end and the lower end of the metering pipe are connected with a vacuum pump and a liquid conveying pipe respectively. According to the negative pressure liquid collecting device, a solution is quantitatively collected through negative pressure, and the liquid volume can be stably and accurately obtained for a long time; and the structure is simple and the assembly is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid metering, in particular to a negative pressure liquid collection device. Background Technique

[0002] In the trend of refined development of the manufacturing industry, solution quantitative collection equipment plays an indispensable role in production, detection and other links.

[0003] In the application background of precise quantitative collection of liquids, liquid pumps and flow meters are usually used in combination to quantitatively collect solutions. However, due to significant differences in physical and chemical properties such as viscosity and corrosiveness between different solutions, these characteristics limit their ability to stably and accurately obtain the liquid volume for a long time.

[0004] Therefore, it is necessary to propose a negative pressure liquid collection device to solve the above problems. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the utility model is to provide a negative pressure liquid collection device that can stably and accurately obtain the liquid volume for a long time to solve the problems raised in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions: A negative pressure liquid collection device, comprising:

[0009] A bracket, the bracket includes a base plate and a support, and two supports are fixedly connected relatively at both ends of one side of the base plate;

[0010] A metering tube, the metering tube includes a liquid storage tube and a sealing end cap, and sealing end caps are hermetically sleeved at both ends of the liquid storage tube;

[0011] The metering tube is clamped and fixed by two supports, and a vacuum pump and an infusion tube are respectively connected to the upper and lower ends of the metering tube.

[0012] Preferably, a convex block is provided at one end of the sealing end cap away from the liquid storage tube, the convex block penetrates through the support, and a through hole communicating with the liquid storage tube is opened in the middle of the convex block.

[0013] Preferably, a pipe joint is threadedly connected to the end of the convex block, and the convex block is hermetically connected to the pipe joint.

[0014] Preferably, the cross section of the convex block is a rounded rectangle, and a limiting hole adapted to the cross section of the convex block is opened in the middle of the support.

[0015] Preferably, a T-shaped guide rail is fixedly connected to one side of the substrate along its length direction, and a T-shaped chute adapted to the T-shaped guide rail is provided on one side of the support.

[0016] Preferably, bolt holes are provided at corresponding positions of the substrate and the support, and the substrate and the support are fixedly connected by bolts.

[0017] Preferably, the liquid storage tube and the sealing end cover are hermetically connected through a sealing ring, and an annular groove for limiting the sealing ring is provided inside the sealing end cover.

[0018] Preferably, chamfers are provided on the outer sides of both ends of the liquid storage tube.

[0019] Preferably, a limiting groove adapted to the sealing end cover is provided in the middle of the support.

[0020] Preferably, scales are provided on the outer wall of the liquid storage tube.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present utility model provides a negative pressure liquid collection device, which has the following beneficial effects:

[0023] 1. For this negative pressure liquid collection device, by connecting a vacuum pump and an infusion tube to both ends of the metering tube respectively, the air in the liquid storage tube is extracted by the vacuum pump to generate negative pressure, and the liquid to be collected is inhaled through the infusion tube to a preset liquid level height, so as to realize the quantitative collection of the liquid. The driving device does not need to be in direct contact with the liquid to ensure its long-term and stable operation.

[0024] 2. For this negative pressure liquid collection device, by arranging a substrate, a support and a liquid storage tube, the metering tube is clamped and positioned by two supports, and the sealing end cover is limited at the end of the liquid storage tube. Its structure is simple and the assembly is convenient. Description of the drawings

[0025] Figure 1 is a three-dimensional schematic diagram of the structure of the present utility model;

[0026] Figure 2 is a cross-sectional schematic diagram of the structure of the present utility model;

[0027] Figure 3 is an exploded view of the structure of the present utility model;

[0028] Figure 4 is a cross-sectional schematic diagram of the substrate of the present utility model;

[0029] Figure 5 is a cross-sectional schematic diagram of the sealing end cover of the present utility model.

[0030] In the figure: 1, substrate; 2, support; 3, liquid storage tube; 4, sealing end cap; 5, through hole; 6, T-shaped guide rail; 7, T-shaped chute; 10, limit hole; 11, bump; 12, sealing ring; 13, chamfer; 14, annular groove; 15, limit groove; 16, pipe joint. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0032] Please refer to Figures 1-5 As shown, a negative pressure liquid collection device includes a bracket and a metering tube. The bracket includes a substrate 1 and a support 2. Two supports 2 are relatively fixedly connected to both ends of one side of the substrate 1; the metering tube includes a liquid storage tube 3 and a sealing end cap 4. Sealing end caps 4 are hermetically sleeved at both ends of the liquid storage tube 3; the metering tube is clamped and fixed by two supports 2, and a vacuum pump and an infusion tube are respectively connected to the upper and lower ends of the metering tube. Preferably, the liquid storage tube 3 is made of a transparent glass tube.

[0033] The two ends of the liquid storage tube 3 are sealed by the sealing end cap 4, and then the sealing end cap 4 is clamped and limited at the end of the liquid storage tube 3 by two supports 2. Its assembly is simple and the fixation is firm; during use, when quantitative collection of liquid is required, the end of the infusion tube away from the liquid storage tube 3 is immersed in the liquid to be collected, and then the vacuum pump is started to extract the gas in the liquid storage tube 3. A negative pressure is formed in the liquid storage tube 3 and the liquid is pumped into the liquid storage tube 3 through the infusion pipeline. When the required liquid level height is reached, the vacuum pump is turned off to stop extraction, and the precise quantitative collection of the liquid can be completed.

[0034] In some embodiments, a bump 11 is provided at the end of the sealing end cap 4 away from the liquid storage tube 3. The bump 11 penetrates through the support 2. A through hole 5 communicating with the liquid storage tube 3 is provided in the middle of the bump 11. The cross section of the bump 11 is a rounded rectangle, and a limit hole 10 adapted to the cross section of the bump 11 is provided in the middle of the support 2. The through holes 5 at both ends of the liquid storage tube 3 are respectively connected to the vacuum pump and the infusion pipeline. By providing a bump 11 with a cross section of a rounded rectangle, the rotation of the sealing end cap 4 is avoided.

[0035] Specifically, a pipe joint 16 is threadedly connected to the through hole 5 of the bump 11, and the bump 11 is hermetically connected to the pipe joint 16 through a sealing gasket. By providing the pipe joint 16, the air delivery pipe of the vacuum pump and the infusion pipeline can be connected to the through hole 5.

[0036] To make its assembly more convenient and avoid the misalignment of the two supports 2, a T-shaped guide rail 6 is fixedly connected along the length direction of one side of the substrate 1, and a T-shaped chute 7 adapted to the T-shaped guide rail 6 is provided on one side of the support 2. The support 2 is limited by the cooperation of the T-shaped guide rail 6 and the T-shaped chute 7 to avoid the misalignment problem of the two supports 2 during the assembly process. At the same time, during the assembly process, the support 2 is slid along the T-shaped guide rail 6 to adjust the distance between the two, making the assembly of the support 2 and the sealing end cover 4 more convenient.

[0037] In some embodiments, the substrate 1 and the support 2 are fixedly connected by bolts. Specifically, bolt holes for passing bolts are provided at corresponding positions of the substrate 1 and the support 2. Preferably, a plurality of bolt holes are provided along the length direction of the substrate 1. By providing a plurality of bolt holes, the distance between the two supports 2 can be adjusted to adapt to liquid storage tubes 3 of different lengths.

[0038] In some embodiments, to improve the sealing effect at the connection between the liquid storage tube 3 and the sealing end cover 4, the liquid storage tube 3 and the sealing end cover 4 are hermetically connected through a sealing ring 12, and an annular groove 14 for limiting the sealing ring 12 is provided inside the sealing end cover 4. By providing the annular groove 14 to limit the sealing ring 12, it is avoided that the sealing ring 12 moves with the liquid storage tube 3 during the assembly of the liquid storage tube 3 and the sealing end cover 4, affecting the sealing effect.

[0039] Chamfers 13 are provided on the outer sides of both ends of the liquid storage tube 3 to facilitate the assembly of the liquid storage tube 3 and the sealing end cover 4.

[0040] In some embodiments, to improve the positioning effect of the sealing end cover 4, a limiting groove 15 adapted to the sealing end cover 4 is provided in the middle of the support 2. The end of the sealing end cover 4 is limited by the limiting groove 15 to improve the positioning effect of the support 2 on the sealing end cover 4.

[0041] To facilitate the determination of the solution volume in the liquid storage tube 3, scales corresponding to the volume of the liquid storage tube 3 are provided on the outer wall of the liquid storage tube 3. By providing the scales, the determination of the solution volume is more convenient and accurate.

[0042] Working principle: When quantitatively collecting liquid, it is placed vertically, the through hole 5 at the upper end of the metering tube is connected to a vacuum pump, and the through hole 5 at the lower end is connected to an infusion tube. Then, the end of the infusion tube away from the liquid storage tube 3 is immersed in the liquid to be collected. Then, the vacuum pump is started to extract the gas in the liquid storage tube 3. A negative pressure is formed in the liquid storage tube 3, and the liquid is pumped into the liquid storage tube 3 through the infusion pipeline. The amount of liquid extracted is viewed through the scale on the outer wall of the liquid storage tube 3. When the required liquid level scale is reached, the vacuum pump is turned off to stop extraction, and the precise quantitative collection of the liquid can be completed.

[0043] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A negative pressure liquid collection device, characterized in that: include: A bracket, the bracket comprising a base plate (1) and a support (2), two ends of one side of the base plate (1) being relatively fixedly connected to two supports (2); A metering tube, the metering tube comprising a liquid storage tube (3) and a sealing end cap (4), both ends of the liquid storage tube (3) being sealedly sleeved with the sealing end cap (4); The metering tube is clamped and fixed by two supports (2), and the upper and lower ends of the metering tube are respectively connected to a vacuum pump and an infusion tube.

2. A negative pressure liquid collection device according to claim 1, characterized in that: A protrusion (11) is provided at one end of the sealing end cover (4) away from the liquid storage tube (3), the protrusion (11) passes through the support (2), and a through hole (5) communicating with the liquid storage tube (3) is provided in the middle of the protrusion (11).

3. A negative pressure liquid collection device according to claim 2, characterized in that: The end of the projection (11) is threadedly connected to a pipe joint (16), and the projection (11) is sealedly connected to the pipe joint (16).

4. A negative pressure liquid collection device according to claim 2, characterized in that: The cross section of the protrusion (11) is a rounded rectangular shape, and a limiting hole (10) matching the cross section of the protrusion (11) is provided in the middle of the support (2).

5. A negative pressure liquid collection device according to claim 1, characterized in that: One side of the base plate (1) is fixedly connected to a T-shaped guide rail (6) along its length direction, and one side of the support (2) is provided with a T-shaped slide groove (7) adapted to the T-shaped guide rail (6).

6. A negative pressure liquid collection device according to claim 1, characterized in that: Bolt holes are provided at corresponding positions of the base plate (1) and the support (2), and the base plate (1) and the support (2) are fixedly connected by bolts.

7. A negative pressure liquid collection device according to claim 1, characterized in that: The liquid storage tube (3) is sealedly connected to the sealing end cover (4) via a sealing ring (12); an annular groove (14) for limiting the position of the sealing ring (12) is provided on the inner side of the sealing end cover (4).

8. The negative pressure liquid collection device according to claim 1, characterized in that: Chamfers (13) are provided on the outer sides of both ends of the liquid storage tube (3).

9. A negative pressure liquid collection device according to claim 1, characterized in that: A limiting groove (15) adapted to the sealing end cover (4) is provided in the middle of the support (2).

10. The negative pressure liquid collection device according to claim 1, characterized in that: The outer wall of the liquid storage tube (3) is provided with scales.

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