Liquid separation pipe and liquid separation device

Abstract

The utility model relates to a liquid separation technology, in particular to a liquid separation pipe which comprises a liquid suction portion on the lower portion and an expanded liquid storage portion on the upper portion, the liquid storage portion is provided with a liquid storage cavity with the top open, and the liquid suction portion is a tubular body and provided with a liquid suction channel communicated with the liquid storage cavity. A circle of mounting edge protruding towards the periphery is arranged at the top of the liquid storage part; due to the fact that the expanded liquid storage portion is provided with the liquid storage cavity, when liquid is sucked, the liquid enters the liquid storage cavity through the liquid suction channel and is temporarily stored in the liquid storage cavity. In addition, the utility model further comprises a liquid separation device with the liquid separation pipe, a pump opening is formed in the bottom of the liquid suction pump body, a connector assembly is installed at the position of the pump opening, and the liquid separation pipe is installed on the connector assembly. When the liquid suction pump body starts to suck air, liquid flows into the liquid storage cavity from the liquid suction channel under the action of negative pressure, and the sucked liquid does not exceed the upper edge of the liquid storage cavity by controlling the air suction amount of the liquid suction pump body, so that mutual pollution between the liquid and structures outside the liquid distribution pipe is avoided, and in addition, equipment cleaning is facilitated.

Description

Technical Field

[0001] The utility model relates to a liquid separation technology, and specifically comprises a liquid separation tube and a liquid separation device. Background Art

[0002] In the existing liquid separation device, the pipette is a tubular body with a constant diameter. When the liquid is separated by the suction pump, the liquid will directly enter the suction pump through the pipette, which will cause liquid residue to form in the suction pump. Therefore, the suction pump needs to be cleaned after the suction is completed to prevent liquid contamination caused by cross suction. However, there will still be residual liquid in the suction pump after cleaning, which will cause liquid crystals to form in the suction pump after a long time. These crystals will not only pollute the sucked liquid, but also seriously affect the use of the suction pump. Summary of the invention

[0003] The utility model aims to provide a liquid dispensing device capable of preventing liquid from contacting a liquid suction pump. By increasing an enlarged liquid storage portion, a liquid storage cavity for storing liquid is formed on the upper part of a liquid dispensing tube, thereby preventing the sucked liquid from entering the liquid suction pump.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid dispensing tube, characterized in that it includes a lower liquid suction part and an upper bulged liquid storage part, wherein the liquid storage part has a liquid storage cavity with an open top, the liquid suction part is a tubular body, has a liquid suction channel, and the liquid suction channel is connected to the bottom of the liquid storage cavity; a circle of mounting edges protruding toward the periphery is arranged on the top of the liquid storage part. Since the bulged liquid storage part has a liquid storage cavity, when absorbing liquid, the liquid will enter the liquid storage cavity through the liquid suction channel and be temporarily stored in the liquid storage cavity without contacting equipment other than the liquid dispensing tube.

[0005] In the above technical solution, an enlarged liquid storage part is provided on the top of the liquid suction part, so that the entire liquid dispensing tube has not only the liquid suction function but also the liquid storage function. Under the action of negative pressure, the liquid flows upward from the liquid suction channel. When the liquid enters the liquid storage cavity, the liquid flow rate decreases and slowly rises in the liquid storage cavity. By controlling the total liquid suction volume, the sucked liquid will be stored in the liquid storage cavity and the liquid suction channel. Therefore, the liquid can be prevented from contacting other equipment outside the liquid dispensing tube, which can prevent the liquid from affecting other equipment and preventing the liquid from being contaminated. At the same time, since the liquid only exists in the liquid dispensing tube, the liquid dispensing tube only needs to be cleaned or replaced after the liquid suction is completed.

[0006] As a preferred solution, the liquid storage part is composed of an upper mounting part and a lower converging part, wherein the mounting part is tubular with the same upper and lower diameters, the converging part is funnel-shaped with the upper diameter larger than the lower diameter, and the mounting edge is arranged on the upper edge of the mounting part. The tubular mounting part facilitates the installation of the liquid dispensing tube, and the funnel-shaped converging part can eliminate the dead angle in the liquid storage cavity, so that the liquid inside the liquid storage cavity flows down smoothly under the action of gravity, reducing liquid residue.

[0007] As a preferred solution, the lower end of the liquid suction channel is the liquid suction port, the lower part of the inner side wall of the liquid suction channel is the inner wall of the liquid suction port, and the inner wall of the liquid suction port is in an inverted cone shape that shrinks inward, so that the diameter of the liquid suction port is smaller than the diameter of the liquid suction channel. After reducing the diameter of the lower end of the liquid suction channel, it will not affect the normal liquid suction and discharge, and after stopping the liquid suction, when the liquid suction port is upwardly separated from the liquid surface, the inverted cone-shaped inner wall of the liquid suction port will form a self-seal for the liquid inside the liquid suction channel to prevent the liquid from dripping.

[0008] Another object of the utility model is to provide a liquid dispensing device, which includes a liquid suction pump body, the bottom of which has a pump port, a connector assembly, and a liquid dispensing tube having the above-mentioned characteristics. The connector assembly includes an inner joint, which is installed at the pump port through a mounting tube arranged at the top, and the inner joint has an air hole connected to the pump port; the connector assembly also includes an outer fixed sleeve installed on the outer periphery of the inner joint, and a limiting edge extending inward is arranged at the lower part of the outer fixed sleeve; the liquid dispensing tube passes through the outer fixed sleeve from top to bottom, and the front side of the mounting edge thereof touches the inner joint, and the limiting edge of the outer fixed sleeve touches the back side of the mounting edge.

[0009] In the above technical solution, the connecting head assembly is installed at the pump port of the suction pump body. After the dispensing tube is installed in conjunction with the inner joint, an external fixing sleeve is used to press the mounting edge from below to achieve fixed installation of the dispensing tube. At this time, the dispensing tube is connected to the pump port through the air hole. When the suction pump body starts to pump air, the liquid will flow into the liquid storage cavity from the suction channel under the action of negative pressure. By controlling the suction volume of the suction pump body, the pumped liquid does not exceed the upper edge of the liquid storage cavity, thereby avoiding mutual contamination between the liquid and the structure other than the dispensing tube. It is also convenient to clean and replace the contaminated dispensing tube.

[0010] As a preferred solution, the installation pipe has an external thread, the pump port has an internal thread, and the two are threadedly connected. The internal joint is threadedly connected to the suction pump body to ensure a stable connection and easy disassembly and assembly.

[0011] As a preferred embodiment, the inner joint has a threaded portion and an insertion portion, wherein the diameter of the threaded portion is larger than the diameter of the insertion portion, and a threaded segment I is arranged on the outer periphery of the threaded portion; a threaded segment II matching the threaded segment I is arranged on the inner periphery of the outer fixed sleeve, the two are threadedly connected, and the inner joint has a sealing ring, which contacts the liquid storage portion and makes the liquid storage portion and the inner joint in a closed state.

[0012] As a preferred solution for the sealing ring, a sealing groove I recessed upward is provided on the back of the threaded portion, and the sealing ring includes a sealing ring I provided in the sealing groove I, and the front side of the mounting edge contacts the sealing ring I. The sealing ring I contacts the mounting edge to form a seal at the top, while preventing the top of the mounting portion from directly contacting the inner joint, thereby preventing the mounting portion from being broken due to rigid contact with the inner joint.

[0013] As a preferred embodiment of the sealing ring, the sealing ring further comprises a sealing ring II, a sealing groove II is arranged on the outer periphery of the inserting portion, the sealing ring comprises a sealing ring II arranged in the sealing groove II, and the sealing ring II is closely fitted to the inner wall of the mounting portion, so that a seal can be formed at the inner wall of the mounting portion, and a certain distance can be maintained between the mounting portion and the inner joint to avoid rigid contact between the mounting portion and the inner joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 A schematic diagram of the longitudinal cross-section structure of the liquid dispensing tube of the embodiment provided by the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the cutaway structure of the lower inlet of the dispensing tube is shown;

[0017] Figure 3 A schematic diagram of the planar structure of the liquid separation device provided in this embodiment;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure of a liquid suction pump body in the liquid separation device shown;

[0019] Figure 5 for Figure 3 A schematic diagram of the disassembly structure of the connector assembly in the liquid separation device shown;

[0020] Figure 6 It is a schematic diagram of the longitudinal section structure of the connector assembly;

[0021] Figure 7 It is a schematic diagram of the longitudinal cross-section structure of the dispensing tube and the connecting head assembly in the installed state.

[0022] In the figure, there are a liquid suction pump body 1, a connector assembly 2, a liquid dispensing tube 3, a pump port 101, an inner joint 201, an outer fixing sleeve 202, a mounting tube 203, a clamping cap 204, a threaded section I205, a threaded section II206, a limiting edge 207, an air hole 208, a sealing groove I209, a sealing ring I210, a sealing groove II211, a sealing ring II212, a liquid storage part 301, a liquid suction part 302, a liquid suction channel 303, a liquid storage cavity 304, a liquid suction port 305, a mounting part 306, a converging part 307, a mounting edge 308, and an inner wall 309 of the liquid suction port. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Figure 1 An embodiment of the utility model is a liquid dispensing tube, which is a borosilicate transparent glass tube, including a lower liquid suction part 302 and an upper bulged liquid storage part 301, wherein the liquid storage part 301 has a liquid storage cavity 304 with an open top, and is specifically divided into an upper mounting part 306 and a lower converging part 307, wherein the mounting part 306 is tubular with the same upper and lower diameters, the converging part 307 is funnel-shaped with an upper diameter larger than a lower diameter, and a mounting edge 308 protruding toward the periphery is provided on the upper edge of the mounting part 306; the liquid suction part 302 is a tubular body, having a liquid suction channel 303, and the liquid suction channel 303 is connected to the bottom of the liquid storage cavity 304; in addition, as Figure 2 As shown, the lower end of the liquid suction channel 303 is the liquid suction port 305, and the lower part of the inner wall of the liquid suction channel 303 is the liquid suction port inner wall 309. The liquid suction port inner wall 309 is in an inverted cone shape that shrinks inward, so that the diameter of the liquid suction port 305 is smaller than the diameter of the liquid suction channel 303. In this embodiment, the contraction angle α of the liquid suction port inner wall 309 is 13.3°, and the ratio of the diameter of the liquid suction channel 303 to the liquid suction port 305 is 1.5:1. For the liquid dispensing tube of this structure, since the enlarged liquid storage part 301 has a liquid storage cavity 304, when aspirating liquid, the liquid will enter the liquid storage cavity 304 through the liquid aspiration channel 303 and be temporarily stored in the liquid storage cavity 304. When the liquid needs to be discharged, the funnel-shaped convergence part 307 can eliminate the dead corners in the liquid storage cavity 304, so that the liquid inside the liquid storage cavity 304 can flow down smoothly under the action of gravity, reducing liquid residue. During the whole process, the liquid will not contact equipment other than the liquid dispensing tube, and after the operation is completed, only the liquid dispensing tube needs to be cleaned; in addition, after reducing the caliber of the lower end of the liquid aspiration channel 303, it will not affect the normal liquid aspiration and discharge. After stopping the liquid aspiration, when the liquid aspiration port 305 is upwardly separated from the liquid surface, the inverted cone-shaped liquid aspiration port inner wall 309 will form a self-seal for the liquid inside the liquid aspiration channel 303 to prevent liquid dripping.

[0025] Based on the above-mentioned liquid dispensing tube with liquid storage function, this embodiment also provides a Figure 3 The liquid dispensing device shown in FIG. The liquid dispensing device comprises a liquid suction pump body 1, as shown in FIG. Figure 4 As shown, a pump port 101 with internal threads is provided at the bottom of the suction pump body 1, and also includes a connector assembly 2 and a liquid dispensing tube 3 with the above-mentioned characteristics, wherein the connector assembly 2 is installed at the pump port 101 and is used to fix the liquid dispensing tube 3.

[0026] Specifically, Figure 5As shown, the connector assembly 2 includes an inner connector 201 and an outer fixing sleeve 202, wherein the inner connector 201 is divided into a threaded portion and an insertion portion, wherein the diameter of the threaded portion is larger than the diameter of the insertion portion, and a threaded segment 1205 is arranged on the outer periphery of the threaded portion; a mounting tube 203 with an external thread is arranged on the top of the threaded portion, and is installed in the pump port 101 through the mounting tube 203, and the upper part of the threaded segment 1205 is constructed into a regular hexagonal clamping cap 204, so as to facilitate the disassembly and assembly of the connector assembly 2 using a wrench. In addition, in combination with Figure 6 , a sealing groove 1209 recessed upward is provided on the back of the threaded portion, a sealing ring 1210 is provided in the sealing groove 1209, and the front side of the mounting edge 308 contacts the sealing ring 1210; a sealing groove 1121 is provided on the periphery of the insertion portion, and a sealing ring 11212 is provided in the sealing groove 11211, and the sealing ring 11212 is closely fitted to the inner wall of the mounting portion 306. In the above sealing structure, the sealing ring 11210 and the sealing ring 11212 form a seal at the top and inside of the liquid storage portion 301 respectively, ensuring that there is no air leakage, and at the same time preventing the mounting portion 306 from directly and rigidly contacting the inner joint 201, thereby preventing the liquid dispensing tube from breaking during installation.

[0027] In addition, the upper inner periphery of the outer fixing sleeve 202 is provided with a threaded section I206 that matches the threaded section I205, and the two are threadedly connected. The lower part of the outer fixing sleeve 202 is provided with a limit edge 207 extending inward, and the reserved gap width between the limit edge 207 and the insertion portion is greater than the wall thickness of the mounting portion 306. Figure 7 As shown in the figure, when installing the dispensing tube 3, the dispensing tube 3 can be first passed through the outer fixing sleeve 202 from top to bottom, and then the outer fixing sleeve 202 is rotated to slowly tighten it. During this process, the limiting edge 207 will push the installation edge 308 to move the dispensing tube 3 upward, and make the sealing ring 1210 and the sealing ring 1 I212 contact the installation part 306 respectively until the sealing installation is completed.

[0028] When aspirating liquid, the stroke of the liquid suction pump body 1 can be set in advance, or the liquid level height in the liquid storage chamber 304 can be observed at all times, and the liquid suction pump body 1 can be closed before the liquid storage chamber 304 is filled. Therefore, when the liquid dispensing device is in use, the liquid only exists in the liquid dispensing tube. Compared with the existing similar devices, it can prevent the liquid from entering the liquid suction pump and causing crystal residue. In addition, the liquid only contacts the liquid dispensing tube 3, and the liquid dispensing tube 3 is easy to clean. Therefore, the liquid suction device is easy to clean and can prevent liquid contamination caused by liquid residue during cross-use.

[0029] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0030] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0031] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A liquid dispensing tube, characterized in that: It includes a lower liquid absorption part and an upper expanded liquid storage part, wherein the liquid storage part has a liquid storage cavity with an open top, the liquid absorption part is a tubular body, has a liquid absorption channel, and the liquid absorption channel is connected to the bottom of the liquid storage cavity; a circle of mounting edges protruding toward the periphery is arranged on the top of the liquid storage part.

2. The liquid dispensing tube according to claim 1, characterized in that: The liquid storage part is composed of an upper mounting part and a lower converging part, wherein the mounting part is tubular with the same upper and lower diameters, the converging part is funnel-shaped with an upper diameter larger than a lower diameter, and the mounting edge is arranged on the upper edge of the mounting part.

3. The liquid dispensing tube according to claim 2, characterized in that: The lower end of the liquid suction channel is the liquid suction port, and the lower part of the inner wall of the liquid suction channel is the inner wall of the liquid suction port. The inner wall of the liquid suction port is in an inverted cone shape that shrinks inward, so that the diameter of the liquid suction port is smaller than the diameter of the liquid suction channel.

4. Liquid separation device, characterized in that: It includes a suction pump body, which has a pump port at the bottom, a connecting head assembly, and a dispensing tube as described in claim 2 or 3; the connecting head assembly includes an inner joint, which is installed at the pump port through a mounting tube arranged at the top, and the inner joint has an air hole connected to the pump port; the connecting head assembly also includes an outer fixed sleeve installed on the outer periphery of the inner joint, and a limiting edge extending inward is arranged at the lower part of the outer fixed sleeve; the dispensing tube passes through the outer fixed sleeve from top to bottom, and the front side of its mounting edge touches the inner joint, and the limiting edge of the outer fixed sleeve touches the back side of the mounting edge.

5. The liquid separation device according to claim 4, characterized in that: The installation pipe has external threads, and the pump port has internal threads, and the two are threadedly connected.

6. The liquid separation device according to claim 4, characterized in that: The inner joint comprises a threaded portion and an insertion portion, wherein the diameter of the threaded portion is larger than the diameter of the insertion portion, and a threaded segment I is arranged on the outer periphery of the threaded portion; a threaded segment II cooperating with the threaded segment I is arranged on the inner periphery of the outer fixed sleeve, and the two are threadedly connected, and the inner joint comprises a sealing ring, which contacts the liquid storage portion and keeps the liquid storage portion and the inner joint in a sealed state.

7. The liquid separation device according to claim 6, characterized in that: A sealing groove I recessed upward is arranged on the back side of the threaded portion, and the sealing ring comprises a sealing ring I arranged in the sealing groove I, and the front side of the mounting edge contacts the sealing ring I.

8. The liquid separation device according to claim 6 or 7, characterized in that: The sealing ring also includes a sealing ring II. A sealing groove II is arranged on the outer periphery of the inserting portion. The sealing ring includes a sealing ring II arranged in the sealing groove II, and the sealing ring II is tightly fitted to the inner wall of the mounting portion.

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