Double-sleeve elastic liquid taking device

Abstract

The utility model belongs to the technical field of water quality detection, and discloses a double-sleeve elastic liquid taking device which comprises a fixed cylinder, a sliding piece and an elastic piece, one end of the fixed cylinder is closed, the other end of the fixed cylinder is open, and a limiting part is arranged on the inner wall of the fixed cylinder; one end of the sliding piece is inserted into the fixed cylinder and can slide between the cylinder bottom of the fixed cylinder and the limiting part, and the other end of the sliding piece is provided with a sampling head; the elastic piece is arranged in the fixed barrel and clamped between the barrel bottom of the fixed barrel and the sliding piece, and under the action of the elastic piece, the sliding piece can abut against the limiting part for limiting. According to the utility model, the stress of the sampling head can be buffered, so that the sampling head is prevented from damaging test paper or hard collision between the sampling head and a liquid drop container is avoided; the elastic piece is arranged between the fixed cylinder and the sliding piece, so that the sliding upper limit and the sliding lower limit of the sliding piece can be buffered and limited, the elastic buffering requirement of the sampling head is met, and the service life of the double-sleeve elastic liquid taking device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to a double-tube elastic liquid collecting device. Background Art

[0002] In water quality testing projects, dipping is generally used for micro-sampling of liquids. A sampling stick is used to dip the liquid for sampling, and then the liquid is transferred to the test paper. When the current fully automatic micropipette transfers the sample to the test paper after sampling, it is necessary to accurately calculate the relative distance between the sampling stick and the test paper, and strictly control the movement speed of the micropipette sampling stick to the test paper to prevent the micropipette sampling stick from damaging the test paper and causing the test result to fail. Therefore, the accuracy and assembly accuracy of the relevant structural parts on the micropipette are very high. In actual production and control, there are errors in the length of the sampling stick. In the process of dripping droplets, the dipping stick often hits the test paper or fails to contact the test paper. In actual use, the dipping stick will be contaminated or damaged and needs to be replaced, which results in a high overall cost. Utility Model Content

[0003] The purpose of the utility model is to provide a double-tube elastic liquid taking device to solve the problems of a sampling rod being damaged by force when dripping liquid and easily causing damage to a test paper.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] Double-tube elastic liquid collection device, including:

[0006] a fixed cylinder, one end of which is closed and the other end is open, and an inner wall of which is provided with a limiting portion;

[0007] a sliding member, one end of which is inserted into the fixed cylinder and can slide between the cylinder bottom of the fixed cylinder and the limiting portion, and the other end of which is provided with a sampling head;

[0008] An elastic member is provided in the fixed cylinder and is clamped between the cylinder bottom of the fixed cylinder and the sliding member. Under the action of the elastic member, the sliding member can abut against the limiting portion to limit the position.

[0009] In some embodiments, the double-tube elastic liquid extraction device further includes a base, the base is provided with a mounting hole, and the fixing tube is disposed in the mounting hole.

[0010] In some embodiments, there are multiple mounting holes, and the multiple mounting holes are arranged at intervals.

[0011] In some embodiments, the fixing cylinder is threadedly connected to the mounting hole.

[0012] In some embodiments, the limiting portion is protruded from the inner wall of the fixing tube.

[0013] In some embodiments, the end of the sliding member inserted into the fixed cylinder is provided with a sliding groove, and the limiting portion is slidably installed in the sliding groove.

[0014] In some embodiments, the limiting portion is formed by an inward concave outer wall of the fixing cylinder.

[0015] In some embodiments, a sealing member is provided between the fixed cylinder and the sliding member.

[0016] In some embodiments, an outer side wall of the sliding member is provided with an annular groove, and the sealing member is provided in the annular groove.

[0017] In some embodiments, the double-tube elastic liquid collection device further includes a sampling rod, the top end of the sampling rod is connected to the sliding member, and the bottom end is provided with the sampling head.

[0018] In some embodiments, the sliding member is provided with an internal threaded hole, the sampling rod is provided with a threaded rod, and the threaded rod is threadedly connected to the threaded hole.

[0019] In some embodiments, the sampling head is a semicircular groove.

[0020] In some embodiments, the elastic member is a spring.

[0021] Beneficial effects of the utility model:

[0022] The double-sleeve elastic liquid taking device provided by the utility model comprises a fixed cylinder and a sliding part slidably arranged in the fixed cylinder, the sliding part is provided with a sampling head for sampling, when the sampling head takes liquid, the sampling head moves up after being subjected to force and drives the sliding part to slide in the fixed cylinder, thereby buffering the force applied to the sampling head rod, avoiding damage to the sample test paper caused by liquid taking or hard collision between the sampling head and the drop container, solving the problem that the sampling head is easily damaged by force and the problem that the liquid taking head is easily damaged by collision to the test paper; by arranging an elastic part between the fixed cylinder and the sliding part, the elastic part can buffer and limit the position of the upper and lower sliding limits of the sliding part, and the elastic part is adapted according to the force condition of the sampling head, so as to meet the elastic buffering requirements of the sampling head, which is beneficial to improving the service life of the double-sleeve elastic liquid taking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic cross-sectional view of the double-tube elastic liquid extraction device provided in the first embodiment of the present invention;

[0024] Figure 2 This is a structural diagram of a double-tube elastic liquid extraction device provided in Example 1 of the present utility model installed on a base;

[0025] Figure 3 This is a structural diagram of the base of the double-tube elastic liquid extraction device provided in the first embodiment of the present invention;

[0026] Figure 4 This is a schematic cross-sectional view of a double-tube elastic liquid extraction device provided in Example 2 of the present utility model;

[0027] Figure 5 This is a structural schematic diagram of a double-tube elastic liquid extraction device provided in the second embodiment of the present invention installed on a base.

[0028] In the picture:

[0029] 1. Fixed cylinder; 11. Limiting part; 2. Sliding part; 21. Slide groove; 22. Annular groove; 23. Internal threaded hole; 3. Elastic part; 4. Base; 41. Mounting hole; 42. Connecting hole; 5. Sealing part; 6. Sampling rod; 61. Sampling head; 62. Threaded rod. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0034] Example 1:

[0035] The first embodiment of the present invention provides a double-tube elastic liquid extraction device, such as Figure 1-Figure 3 As shown, it includes a fixed cylinder 1, a sliding member 2 and an elastic member 3. One end of the fixed cylinder 1 is closed and the other end is open. The inner wall of the fixed cylinder 1 is provided with a limiting portion 11; one end of the sliding member 2 is inserted into the fixed cylinder 1 and can slide between the bottom of the fixed cylinder 1 and the limiting portion 11, and the other end of the sliding member 2 is provided with a sampling head 61; the elastic member 3 is arranged in the fixed cylinder 1 and clamped between the bottom of the fixed cylinder 1 and the sliding member 2. Under the action of the elastic member 3, the sliding member 2 can abut against the limiting portion 11 to limit the position.

[0036] The double-sleeve elastic liquid taking device provided by the present invention comprises a fixed cylinder 1 and a sliding member 2 forming a double-sleeve structure. When taking liquid or dripping liquid, the sampling head 61 drives the sliding member 2 to slide in the fixed cylinder 1 after being subjected to force, thereby buffering the force applied to the sampling head 61, avoiding damage to the test paper by the sampling head 61 or hard collision between the liquid taking head 61 and the drop container; by arranging an elastic member 3 between the fixed cylinder 1 and the sliding member 2, the elastic member 3 can buffer and limit the upper and lower sliding limits of the sliding member 2, and then the elastic member 3 can be adapted according to the force applied to the liquid taking head 61 to meet the elastic buffering requirements of the liquid taking head 61, thereby improving the service life of the double-sleeve elastic liquid taking device.

[0037] Preferably, elastic member 3 is a spring with an outer diameter equal to the inner diameter of fixed barrel 1, which helps ensure uniform compression and balanced force distribution. When force is applied to liquid dispensing head 61, it drives slider 2 within fixed barrel 1, compressing the spring and providing a buffer. After the force is released, slider 2 re-engages and repositions against stop 11 under the combined effects of the elastic force of elastic member 3 and its own weight.

[0038] In some embodiments, the double-tube elastic liquid extraction device further includes a base 4 , the base 4 is provided with a mounting hole 41 , and the fixing tube 1 is disposed in the mounting hole 41 .

[0039] In automated liquid collection equipment, the double-tube elastic liquid collection device is generally raised, lowered, and transferred by an automatic drive unit. Therefore, it is necessary to solve the installation problem of the double-tube elastic liquid collection device and the drive unit. Figure 2By setting the fixing cylinder 1 on the base 4 and connecting the driving member through the base 4, rapid replacement and disassembly can be achieved, which is conducive to improving standardization.

[0040] In some embodiments, a plurality of mounting holes 41 are provided, and the plurality of mounting holes 41 are arranged at intervals.

[0041] like Figure 2 and Figure 3 As shown, in this embodiment, the base 4 is provided with four mounting holes 41, which are arranged in a row. When it is necessary to increase the number of liquid collection points, multiple rows and columns of mounting holes 41 can be provided to meet the number of installation requirements, and the double-tube elastic liquid collection device can be selectively installed in any one or several mounting holes 41 in the multiple rows and columns of mounting holes 41. Figure 3 A connecting hole 42 is provided at one end of the base 4 for connecting a driving member. The axes of the connecting hole 42 and the mounting hole 41 are perpendicular to each other to facilitate drive control and installation.

[0042] In some embodiments, the fixing tube 1 is threadedly connected to the mounting hole 41 , that is, an external thread is provided on the outer wall of the fixing tube 1 , and an internal thread is provided on the inner wall of the mounting hole 41 . The fixing tube 1 is threadedly connected to the mounting hole 41 for easy disassembly and installation.

[0043] In some embodiments, the limiting portion 11 is protruded from the inner wall of the fixed cylinder 1. Of course, the limiting portion 11 can also be one or more protruding structures evenly distributed on the circumference of a certain axial cross-section of the fixed cylinder 1, which can also play a limiting role. In this embodiment, a convex ring structure is set as the limiting portion 11 as an example. The structure is simple and the force is balanced, which can reduce the possibility of the sliding part 2 deviating from the axial direction. Specifically, the convex ring structure is formed by the concave outer wall of the fixed cylinder 1. In this embodiment, a fixed cylinder 1 with a thin-walled structure is adopted, and the convex ring structure can be obtained by pressing the side wall of the fixed cylinder 1. Preferably, the convex ring structure is arc-shaped and the convex ring structure is a thin-walled structure, which is conducive to elastic deformation to install the sliding part 2.

[0044] In some embodiments, a sliding groove 21 is provided at the end of the sliding member 2 inserted into the fixing cylinder 1 , and the limiting portion 11 is slidably installed in the sliding groove 21 .

[0045] like Figure 1As shown, the sliding member 2 adopts a cylindrical structure, and an annular groove 21 is provided along the axial direction on the outer peripheral wall of the sliding member 2. When the limiting portion 11 slides in the groove 21, it can stop at the side walls of the groove 21 at both ends to limit the position. It can be understood that the axial length of the groove 21 limits the maximum and minimum displacements of the sampling head 61, which can avoid damage to the elastic member 3 caused by excessive compression or elongation. It can be understood that the limiting portion 11 can also be a round-headed pin inserted into the side wall of the fixed cylinder 1. The pin structure is more conducive to the installation of the sliding member 2, and the arc surface of the pin head is more conducive to processing and manufacturing. Multiple pins are evenly spaced around the circumference of the fixed cylinder 1 to form the limiting portion 11.

[0046] In some embodiments, a seal 5 is provided between the fixed barrel 1 and the sliding member 2. During liquid extraction, the seal 5 prevents liquid from entering the fixed barrel 1, thereby protecting the elastic member 3 and preventing excess liquid from dripping. It should be noted that when the retaining portion 11 in the fixed barrel 1 and the sliding groove 21 of the sliding member 2 slide relative to each other, the seal 5 remains sealed between the fixed barrel 1 and the sliding member 2, achieving a sliding seal.

[0047] In some embodiments, the outer wall of the slider 2 is provided with an annular groove 22, and the sealing member 5 is disposed within the annular groove 22. The sealing member 5 is preferably a rubber ring made of rubber, and the outer diameter of the rubber ring is greater than the depth of the annular groove 22 to ensure a good sealing effect. The annular groove 22 helps to define the position of the sealing ring and prevent it from shifting during the sliding process of the slider 2.

[0048] Example 2:

[0049] On the basis of the first embodiment, the second embodiment provides a double-tube elastic liquid extraction device, such as Figure 4 and Figure 5 As shown, the double-tube elastic liquid sampling device includes a sampling rod 6, the top end of the sampling rod 6 is connected to the sliding member 2, and the bottom end is provided with a sampling head 61.

[0050] like Figure 4 The sampling rod 6 and the sliding member 2 can be an integrated structure or a detachable assembly structure. Taking the assembly structure as an example, by setting the sampling rod 6 at the bottom end of the sliding member 2, the standardization of the double-tube elastic liquid sampling device can be achieved. The top end of the sampling rod 6 is standardized to adapt to the sliding member 2, and the bottom end of the sampling rod 6 is set with sampling heads 61 of different sizes or shapes, which can meet different liquid sampling requirements and facilitate the replacement and disassembly of the sampling head 61.

[0051] In some embodiments, an internal threaded hole 23 is provided on the sliding member 2 , and a threaded rod 62 is provided on the sampling rod 6 . The threaded rod 62 is threadedly connected to the internal threaded hole 23 .

[0052] like Figure 4As shown, the top of the sampling rod 6 is provided with a threaded rod 62 for threaded connection to the sliding member 2, which facilitates the removal and replacement of the sampling rod 6. In some embodiments, the sampling head 61 at the bottom end of the sampling rod 6 is a semicircular groove, the specific size of which is preset according to the volume of the droplet to be taken.

[0053] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Double-tube elastic liquid extraction device, characterized in that: include: A fixed cylinder (1), one end of the fixed cylinder (1) is closed and the other end is open, and a limiting portion (11) is provided on the inner wall of the fixed cylinder (1); A sliding member (2), one end of the sliding member (2) is inserted into the fixed cylinder (1) and is capable of sliding between the bottom of the fixed cylinder (1) and the limiting portion (11), and the other end of the sliding member (2) is provided with a sampling head (61); An elastic member (3) is provided in the fixed cylinder (1) and is clamped between the bottom of the fixed cylinder (1) and the sliding member (2). Under the action of the elastic member (3), the sliding member (2) can abut against the limiting portion (11) to limit the position.

2. The double-tube elastic liquid extraction device according to claim 1, characterized in that: It also includes a base (4), the base (4) is provided with a mounting hole (41), and the fixing cylinder (1) is arranged in the mounting hole (41).

3. The double-tube elastic liquid extraction device according to claim 2, characterized in that: There are a plurality of mounting holes (41), and the plurality of mounting holes (41) are arranged at intervals.

4. The double-tube elastic liquid extraction device according to claim 2, characterized in that: The fixing cylinder (1) is threadedly connected to the mounting hole (41).

5. The double-tube elastic liquid extraction device according to claim 1, characterized in that: The limiting portion (11) is protruding from the inner wall of the fixing cylinder (1).

6. The double-tube elastic liquid extraction device according to claim 5, characterized in that: The end portion of the sliding member (2) inserted into the fixed cylinder (1) is provided with a sliding groove (21), and the limiting portion (11) is slidably installed in the sliding groove (21).

7. The double-tube elastic liquid extraction device according to claim 5, characterized in that: The limiting portion is formed by the inward concave portion of the outer side wall of the fixing cylinder (1).

8. The double-tube elastic liquid extraction device according to claim 1, characterized in that: A sealing member (5) is provided between the fixed cylinder (1) and the sliding member (2).

9. The double-tube elastic liquid extraction device according to claim 8, characterized in that: An annular groove (22) is provided on the outer side wall of the sliding member (2), and the sealing member (5) is arranged in the annular groove (22).

10. The double-tube elastic liquid extraction device according to claim 1, characterized in that: It also includes a sampling rod (6), the top end of which is connected to the sliding member (2), and the bottom end of which is provided with the sampling head (61).

11. The double-tube elastic liquid extraction device according to claim 10, characterized in that: The sliding member (2) is provided with an internal threaded hole (23), the sampling rod (6) is provided with a threaded rod (62), and the threaded rod (62) is threadedly connected to the internal threaded hole (23).

12. The double-tube elastic liquid extraction device according to claim 1, characterized in that: The sampling head (61) is a semicircular groove.

13. The double-tube elastic liquid extraction device according to claim 1, characterized in that: The elastic member (3) is a spring.

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