Trace quantitative sampler for chemical experiment

Abstract

The utility model discloses a trace quantitative sampler for chemical experiments, which relates to the technical field of samplers, and comprises a sampling barrel and a sampling needle core, the bottom of the sampling barrel is fixedly connected with a connecting rod, the top end of the sampling needle core is fixedly connected with a sleeve, the connecting rod is fixed with the sleeve through a mounting mechanism, and the connecting rod is fixedly connected with the sleeve. The mounting mechanism comprises a convex block, two movable grooves are formed in the outer surface of the connecting rod, springs are fixedly connected to the inner walls of the movable grooves, movable plates are slidably connected between the two sides of the inner walls of the movable grooves, and the springs are fixed between the opposite sides of the movable plates and the inner walls of the movable grooves. The connecting rod and the sleeve can be separated by pressing the convex block into the movable groove, so that the sampling needle core can be independently detached from the sampler, the deformed or rusted sampling needle core can be conveniently replaced, the use cost is reduced, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of samplers, in particular to a micro quantitative sampler for chemical experiments. Background Technique

[0002] A sampler is a tool or device used to obtain samples. They are usually used in fields such as analysis, detection, testing, and calibration to obtain a certain amount of substances or data. According to different application scenarios, there are different types of samplers. Different types of samplers can be applicable to different sampling environments and provide the accuracy and precision required in different fields. During chemical experiments, micro samplers are usually used to sample chemical agents.

[0003] Referring to a micro sampler for chemical experiments with the patent application number CN201721766302.5, this utility model can detect the liquid level inside the device through the provided liquid level sensor and display it electronically, sample chemical liquids more precisely, make the sampled data more accurate, and the experimental results more accurate;

[0004] However, during the use of the above patent, the sampling needle core of the sampler is fixed below the outer cylinder and cannot be removed separately. After the needle core is deformed or rusted, the entire sampler needs to be replaced, increasing the use cost and lacking flexibility in use. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a micro quantitative sampler for chemical experiments, which solves the problems that after the needle core is deformed or rusted, the entire sampler needs to be replaced, increasing the use cost and lacking flexibility in use.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: a micro quantitative sampler for chemical experiments, including a sampling cylinder and a sampling needle core. A connecting rod is fixedly connected to the bottom of the sampling cylinder, and a sleeve is fixedly connected to the top of the sampling needle core. The connecting rod is fixed to the sleeve through an installation mechanism;

[0007] The installation mechanism includes a convex block. Two movable grooves are formed on the outer surface of the connecting rod, and a spring is fixedly connected to the inner wall of the movable groove. A movable plate is slidably connected between the two sides of the inner wall of the movable groove. The spring is fixed between the side of the movable plate opposite to the inner wall of the movable groove, and the convex block is fixed to the side of the movable plate away from the spring. Two through holes adapted to the convex block are formed on the outer surface of the sleeve.

[0008] Preferably, a liquid inlet hole adapted to the sampling needle core is formed in the middle of the connecting rod, and the sampling cylinder is made of organic glass material.

[0009] Preferably, scale lines are provided on the surface of the sampling cylinder, and a piston is slidably arranged between two sides of the inner wall of the sampling cylinder.

[0010] Preferably, the top of the piston is fixedly connected with a piston rod, and the top end of the piston rod penetrates through the sampling cylinder and extends to the outside of the sampling cylinder. One end of the piston rod extending to the outside of the sampling cylinder is fixedly connected with a handle.

[0011] Preferably, a hollow sleeve plate is fixedly connected to the outer surface of the sleeve. A protective cylinder is arranged at the bottom of the hollow sleeve plate through an installation component. Both sides of the top of the protective cylinder are fixedly connected with vertical rods, and the top ends of the vertical rods penetrate above the hollow sleeve plate.

[0012] Preferably, the installation component includes an annular plate. The annular plate is fixed to the top of the hollow sleeve plate. Springs are fixedly connected to both sides of the inner wall of the annular plate, and one end of each spring is fixedly connected with an arc-shaped plate. A clamping block is fixedly connected to the inner side of the arc-shaped plate, and a clamping groove adapted to the clamping block is formed on the surface of the vertical rod.

[0013] Preferably, a collar is fixedly connected to the surface of the piston rod, and limiting rods slidably connected to the inner wall of the sampling cylinder are fixed to both sides of the collar.

[0014] Beneficial effects

[0015] The utility model provides a micro quantitative sampler for chemical experiments. Compared with the prior art, the following beneficial effects are achieved:

[0016] (1) For the micro quantitative sampler for chemical experiments, by pressing the convex block into the movable groove, the connecting rod and the sleeve can be separated, so that the sampling needle core can be separately removed from the sampler, which is convenient for replacing the deformed or rusted sampling needle core, reduces the use cost, and has better practicability.

[0017] (2) For the micro quantitative sampler for chemical experiments, when the sampler is not in use, the protective cylinder is sleeved on the sampling needle core, and the protective cylinder is limited through the installation component, preventing external dust, etc. from contaminating the sampling needle core, avoiding repeatedly cleaning the sampling needle core before use, and improving the use efficiency. Description of the drawings

[0018] Figure 1 is a three-dimensional view of the structure of the utility model;

[0019] Figure 2 is a split view of the structure of the connecting rod and the sleeve of the utility model;

[0020] Figure 3 is a cross-sectional view of the structure of the sampling cylinder of the utility model;

[0021] Figure 4 Schematic diagram of the installation component structure of the present utility model;

[0022] Figure 5 For the present utility model Figure 4 Partial enlarged view of part A in it.

[0023] In the figure: 1, sampling cylinder; 2, sampling needle core; 3, connecting rod; 4, sleeve; 5, convex block; 6, movable groove; 7, spring; 8, movable plate; 9, through hole; 10, liquid inlet hole; 11, scale line; 12, piston; 13, piston rod; 14, handle; 15, hollow sleeve plate; 16, protective cylinder body; 17, vertical rod; 18, annular plate; 19, collar; 20, limiting rod; 21, spring; 22, arc plate; 23, clamping block; 24, clamping groove. Specific implementation manner

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Please refer to Figures 1 to 3 As shown, the present utility model provides a micro quantitative sampler for chemical experiments, including a sampling cylinder 1, a sampling needle core 2 and a piston 12. The sampling needle core 2 is made of stainless steel material and is corrosion-resistant. A connecting rod 3 is fixedly connected to the bottom of the sampling cylinder 1. The top end of the sampling needle core 2 is fixedly connected to a sleeve 4. The inner wall of the sleeve 4 is adapted to the connecting rod 3, and a sealing ring is provided at the connection between the bottom of the inner wall of the sleeve 4 and the sampling needle core 2, so as to improve the connection tightness when installed with the connecting rod 3. The connecting rod 3 is fixed to the sleeve 4 through an installation mechanism. The installation mechanism includes a convex block 5. Two movable grooves 6 are opened on the outer surface of the connecting rod 3, and a spring 7 is fixedly connected to the inner wall of the movable groove 6. A movable plate 8 is slidably connected between the two sides of the inner wall of the movable groove 6. The spring 7 is fixed between the opposite sides of the movable plate 8 and the inner wall of the movable groove 6. The convex block 5 is fixed to the side of the movable plate 8 away from the spring 7. Two through holes 9 adapted to the convex block 5 are opened on the outer surface of the sleeve 4. The through holes 9 are used for the convex block 5 to pass through to clamp and fix the connecting rod 3 and the sleeve 4. A liquid inlet hole 10 adapted to the sampling needle core 2 is opened in the middle of the connecting rod 3;

[0027] The sampling cylinder 1 is made of plexiglass. Scale lines 11 are provided on the surface of the sampling cylinder 1. A piston 12 is slidably arranged between the two sides of the inner wall of the sampling cylinder 1. A piston rod 13 is fixedly connected to the top of the piston 12, and the top end of the piston rod 13 penetrates through the sampling cylinder 1 and extends to the outside of the sampling cylinder 1. A handle 14 is fixedly connected to the end of the piston rod 13 extending outside the sampling cylinder 1. A collar 19 is fixedly connected to the surface of the piston rod 13, and limiting rods 20 slidably connected to the inner wall of the sampling cylinder 1 are fixed on both sides of the collar 19. The arrangement of the collar 19 and the limiting rods 20 can keep the piston 12 stable when the piston rod 13 moves up and down.

[0028] With the above structure set, when in use, place the sampling needle core 2 into the chemical reagent bottle, pull up the handle 14, drive the piston rod 13 to move upward, the piston rod 13 drives the piston 12 to move upward, so that the sampling needle core 2 extracts the chemical reagent, and the sampling amount can be known through the scale lines 11. By pressing the protruding blocks 5 on both sides of the sleeve 4 inward, the protruding blocks 5 squeeze the spring 7 through the movable plate 8, so that the protruding blocks 5 retract into the sleeve 4, separate the sleeve 4 from the connecting rod 3, and thus disassemble the sampling needle core 2 from the sampling cylinder 1, which is convenient for replacing the deformed or rusted sampling needle core 2. On the contrary, sleeved the sleeve 4 on the connecting rod 3, and under the reaction force of the spring 7, the protruding blocks 5 pass through the sleeve 4 to complete the installation.

[0029] Embodiment Two

[0030] On the basis of Embodiment One, please refer to Figure 1 、 Figure 4 and Figure 5 As shown, a hollow sleeve plate 15 is fixedly connected to the outer surface of the sleeve 4. A protective cylinder body 16 is arranged at the bottom of the hollow sleeve plate 15 through an installation component. Vertical rods 17 are fixedly connected to both sides of the top of the protective cylinder body 16. The top ends of the vertical rods 17 penetrate above the hollow sleeve plate 15. The installation component includes an annular plate 18, the annular plate 18 is fixed on the top of the hollow sleeve plate 15, springs 21 are fixedly connected to both sides of the inner wall of the annular plate 18, and one end of each spring 21 is fixedly connected to an arc-shaped plate 22. A clamping block 23 is fixedly connected to the inner side of the arc-shaped plate 22. A clamping groove 24 adapted to the clamping block 23 is formed on the surface of the vertical rod 17.

[0031] With the above structure set, when the sampler is not in use, sleeve the protective cylinder body 16 on the sampling needle core 2. Drive the clamping block 23 to squeeze the spring 21 through the arc-shaped plate 22, so that the vertical rods 17 on the protective cylinder body 16 pass through the hollow sleeve plate 15 and the annular plate 18, and then under the reaction force of the spring 21, drive the clamping block 23 to enter the clamping groove 24 to limit the vertical rods 17, thereby limiting the protective cylinder body 16 to prevent external dust, etc. from contaminating the sampling needle core 2 and avoiding the need to repeatedly clean the sampling needle core 2 before use.

[0032] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0033] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-quantitative sampler for chemical experiments, comprising a sampling cylinder (1), a sampling needle core (2) and a piston (12), characterized in that: The bottom of the sampling cylinder (1) is fixedly connected to a connecting rod (3), and the top end of the sampling needle core (2) is fixedly connected to a sleeve (4). The connecting rod (3) is fixed to the sleeve (4) through a mounting mechanism; The mounting mechanism includes a convex block (5). Two movable grooves (6) are formed on the outer surface of the connecting rod (3), and a spring is fixedly connected to the inner wall of the movable groove (6). A movable plate (8) is slidably connected between the two sides of the inner wall of the movable groove (6). The spring is fixed between the side of the movable plate (8) opposite to the inner wall of the movable groove (6). The convex block (5) is fixed to the side of the movable plate (8) away from the spring. Two through holes (9) adapted to the convex block (5) are formed on the outer surface of the sleeve (4).

2. The micro-quantitative sampler for chemical experiments according to claim 1, wherein: A liquid inlet hole (10) adapted to the sampling needle core (2) is formed in the middle of the connecting rod (3). The sampling cylinder (1) is made of plexiglass material.

3. A micro-quantitative sampler for chemical experiments according to claim 1, characterized in that: Scale lines (11) are provided on the surface of the sampling cylinder (1). A piston (12) is slidably arranged between the two sides of the inner wall of the sampling cylinder (1).

4. A micro-quantitative sampler for chemical experiments according to claim 1, characterized in that: The top of the piston (12) is fixedly connected to a piston rod (13), and the top end of the piston rod (13) penetrates through the sampling cylinder (1) and extends to the outside of the sampling cylinder (1). One end of the piston rod (13) extending to the outside of the sampling cylinder (1) is fixedly connected to a handle (14).

5. A micro quantitative sampler for chemical experiments according to claim 1, characterized in that: A hollow sleeve plate (15) is fixedly connected to the outer surface of the sleeve (4). A protective cylinder body (16) is arranged at the bottom of the hollow sleeve plate (15) through a mounting component. Vertical rods (17) are fixedly connected to both sides of the top of the protective cylinder body (16), and the top ends of the vertical rods (17) penetrate above the hollow sleeve plate (15).

6. A micro quantitative sampler for chemical experiments according to claim 5, characterized in that: The mounting component includes an annular plate (18). The annular plate (18) is fixed to the top of the hollow sleeve plate (15). Springs (21) are fixedly connected to both sides of the inner wall of the annular plate (18), and one end of each spring (21) is fixedly connected to an arc-shaped plate (22). A clamping block (23) is fixedly connected to the inner side of the arc-shaped plate (22). A clamping groove (24) adapted to the clamping block (23) is formed on the surface of the vertical rod (17).

7. A micro-quantitative sampler for chemical experiments according to claim 4, characterized in that: A collar (19) is fixedly connected to the surface of the piston rod (13), and limiting rods (20) slidably connected to the inner wall of the sampling cylinder (1) are fixed to both sides of the collar (19).

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