Chemical liquid taking device

Abstract

The utility model belongs to the technical field of sampling equipment, and particularly relates to a chemical liquid sampling device which comprises a sampling barrel, a piston assembly, an outer barrel and a cleaning ring, a sampling head is arranged at the bottom end of the sampling barrel and used for stretching into chemical liquid during liquid sampling, and a piston assembly in the sampling barrel is used for sucking and discharging the liquid during movement; after liquid taking is finished, a user directly moves down an outer barrel slidably connected to the outer side wall of the sampling barrel, the outer barrel can drive an elastic rod on the outer barrel and a cleaning ring clamped to the free end of the elastic rod to move down when moving down, and due to the fact that the inner side wall of the cleaning ring makes contact with the outer side wall of the sampling head, the cleaning ring can clean the sampling head stretching into the chemical liquid when moving down; according to the scheme, operation convenience can be improved, dependence on external tools is reduced, the cleaning ring is clamped to the free end of the elastic rod, the cleaning ring is firm and convenient to replace, and the cleaning ring can be used repeatedly or used one by one according to the type of chemical liquid and the actual situation.

Description

Technical Field

[0001] This utility model belongs to the field of sampling equipment technology, specifically relating to a chemical liquid sampling device. Background Technology

[0002] Chemicals refer to pure substances and mixtures composed of various elements, whether natural or man-made. In experiments and production processes, people use different chemical instruments to measure or react materials. Among these processes, chemical sampling and sample analysis are important steps for observing experimental results and inspecting product quality. It includes the entire sampling process, such as chemical sample collection, processing, analysis, and quality inspection. Chemical analysis is then used to determine the beneficial and harmful components of the sampled chemicals, providing data for solving problems related to the use and storage of chemicals.

[0003] Chemical liquids are generally transferred using a sampling cylinder and piston assembly. During sampling, the sampling head on the sampling cylinder is inserted into the chemical liquid, and then the liquid is drawn into the sampling cylinder by lifting the piston assembly. For example, a chemical sampling device disclosed in patent number CN202322241815.6 cleans some chemicals adhering to the outer wall of the sampling head by moving a cleaning assembly when the sampling head is withdrawn after sampling. This requires the use of external tools to clamp the isolation tube downwards through a groove, causing the first and second magnetic rings to separate. The downward movement of the isolation tube moves the adsorption gasket downwards. Because the inner wall of the adsorption gasket contacts the outer wall of the sampling head, the adsorption gasket effectively absorbs and cleans the chemicals adhering to the outer wall of the sampling head, preventing chemical drips from causing injury to the testing personnel. However, the above patent still has some problems: it requires external tools to operate the cleaning assembly, which is cumbersome and inconvenient to use.

[0004] Based on this, the applicant is considering designing a chemical liquid dispensing device that can improve the ease of operation. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a chemical liquid dispensing device that can improve the ease of operation.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A chemical liquid sampling device includes a sampling cylinder, a piston assembly, an outer cylinder, and a cleaning ring; the sampling cylinder has a sampling head at its bottom end and an opening at its top end, and the piston assembly is disposed inside the sampling cylinder;

[0008] The outer cylinder is slidably connected to the outer side wall of the sampling cylinder, and at least two elastic rods are arranged on the outer cylinder, one end of the elastic rod is fixedly connected to the outer cylinder, and the other end is a free end connected to the cleaning ring.

[0009] The working principle and advantages of the chemical liquid taking device are as follows:

[0010] The bottom end of the sampling cylinder is provided with a sampling head for extending into the chemical liquid during liquid taking, and the piston assembly in the sampling cylinder is used to suck and discharge liquid when moving; after liquid taking is completed, the user directly moves downward the outer cylinder slidably connected to the outer side wall of the sampling cylinder, and the outer cylinder can drive the elastic rod and the cleaning ring connected to the free end of the elastic rod to move downward, and since the inner side wall of the cleaning ring is in contact with the outer side wall of the sampling head, the cleaning ring can clean the sampling head extending into the chemical liquid when moving downward; the present application can improve the operation convenience, reduce the dependence on external tools, and the cleaning ring and the free end of the elastic rod are connected, which is firm and convenient to replace the cleaning ring, so that the cleaning ring can be used multiple times or one ring at a time according to the type and actual situation of the chemical liquid.

[0011] Further, the piston assembly comprises a piston rod and a piston head connected to the end thereof.

[0012] Further, the inner side wall of the cleaning ring is fixedly connected with a rubber ring and a sponge ring, and the rubber ring is located below the sponge ring.

[0013] Further, the outer side wall of the outer cylinder is provided with oppositely arranged pinch grooves.

[0014] Further, a limiting block protruding from the outer cylinder is arranged to block the upward movement of the outer cylinder.

[0015] Further, a clamping groove is arranged on the outer side wall of the cleaning ring for the free end of the elastic rod to extend into.

[0016] Further, a moving block is protruding from one side of the elastic rod towards the sampling cylinder, and a fixed block is protruding from the outer side wall of the sampling cylinder, and the fixed block is located on the moving track of the moving block.

[0017] Further, a sliding groove is arranged on the sampling cylinder, the fixed block is located in the sliding groove, and the moving block is slidably arranged in the sliding groove.

[0018] Further, an elastic pad is fixed to the inner side wall of the outer cylinder and in contact with the outer side wall of the sampling cylinder, and the side of the elastic pad towards the sampling cylinder is sawtooth-shaped.

[0019] Further, the outer side wall of the sampling cylinder and the inner side wall of the outer cylinder are tapered and matched with each other. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic view of the chemical liquid taking device of the embodiment of the utility model;

[0021] Figure 2 It is the front view structure schematic view of the chemical liquid taking device of the embodiment of the utility model;

[0022] Figure 3 It is the right view structure schematic view of the chemical liquid taking device of the embodiment of the utility model;

[0023] Figure 4 It is the section structure schematic view of the chemical liquid taking device of the embodiment of the utility model;

[0024] Figure 5 It is the section structure schematic view of the chemical liquid taking device of another embodiment of the utility model;

[0025] Figure 6 It is Figure 4 It is the enlarged view of A in the utility model;

[0026] Figure 7 It is Figure 5 It is the enlarged view of B in the utility model;

[0027] Figure 8 It is the bottom view structure schematic view of the chemical liquid taking device of still another embodiment of the utility model;

[0028] Figure 9 It is the section structure schematic view of the cleaning ring of the utility model;

[0029] Figure 10 It is the section structure schematic view of the conical sampling cylinder and outer cylinder of the embodiment of the utility model;

[0030] In the above drawing: 100, sampling cylinder; 101, sliding groove; 110, sampling head; 120, fixed block; 130, flange; 140, limiting block;

[0031] 210, piston rod; 220, piston head;

[0032] 300, outer cylinder; 310, pinch groove; 320, elastic rod; 321, moving block; 330, elastic pad;

[0033] 400, cleaning ring; 410, clamping groove; 420, rubber ring; 430, sponge ring. DETAILED DESCRIPTION

[0034] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0035] Referring to Figures 1-3 The embodiment provides a chemical liquid taking device which comprises a sampling cylinder 100, a piston assembly, an outer cylinder 300 and a cleaning ring 400; the bottom end of the sampling cylinder 100 is provided with a sampling head 110, the top end is provided with an opening, and the inside of the sampling cylinder 100 is provided with the piston assembly;

[0036] The outer cylinder 300 is slidingly connected to the outer side wall of the sampling cylinder 100, at least two elastic rods 320 are arranged on the outer cylinder 300, one end of the elastic rod 320 is fixedly connected to the outer cylinder 300, the other end is a free end for clamping the cleaning ring 400, and the inner side wall of the cleaning ring 400 is in contact with the outer side wall of the sampling head 110.

[0037] In the embodiment, the bottom end of the sampling cylinder 100 is provided with the sampling head 110 for being inserted into the chemical liquid when taking liquid, and the piston assembly in the sampling cylinder 100 is used for inhaling and discharging the chemical liquid when moving; after the taking of liquid is completed, the user directly moves downward the outer cylinder 300 which is slidingly connected to the outer side wall of the sampling cylinder 100, the outer cylinder 300 can drive the elastic rod 320 and the cleaning ring 400 clamped by the free end of the elastic rod 320 to move downward when moving downward, and the cleaning ring 400 can clean the sampling head 110 inserted into the chemical liquid when moving downward because the inner side wall of the cleaning ring 400 is in contact with the outer side wall of the sampling head 110; the scheme can improve operation convenience, reduce dependence on external tools, and the cleaning ring 400 is clamped and arranged with the free end of the elastic rod 320, is firm and convenient to replace the cleaning ring 400, so that the cleaning ring 400 can be used repeatedly or one ring is used according to the type and actual situation of the chemical liquid.

[0038] Preferably, as Figures 1-7 shown, the piston assembly comprises a piston rod 210 and a piston head 220 connected to the end of the piston rod 210; the piston rod 210 drives the piston head 220 to move up and down when moving up and down in the sampling cylinder 100, the piston head 220 is made of elastic material and closely adheres to the inner side wall of the sampling cylinder 100 to form a sealed environment, so as to ensure the inhaling and discharging of the chemical liquid.

[0039] Preferably, as Figure 9As shown, the inner side wall of the cleaning ring 400 is fixedly connected with a rubber ring 420 and a sponge ring 430, and the rubber ring 420 is located below the sponge ring 430; when the cleaning ring 400 moves downward, the rubber ring 420 in the cleaning ring 400 first scrapes off the chemical liquid adhered to the outer side wall of the sampling head 110, so that the scraped chemical liquid drops back to the chemical liquid container or other places, and then the sponge ring 430 of the cleaning ring 400 can absorb the residual chemical liquid on the outer side wall of the sampling head 110, so that the cleaning effect is good; and the cleaning ring 400 of the scheme has simple structure, low manufacturing cost, and low cost of use and replacement.

[0040] Preferably, as Figures 1-6 As shown, the outer side wall of the outer cylinder 300 is provided with oppositely arranged pinch grooves 310; the pinch grooves 310 can enable the user to hold the outer cylinder 300 more stably, reducing hand sliding, and the pinch grooves 310 can also serve as a visual and tactile prompt to enable the user to more easily identify and operate the outer cylinder 300; improving the holding comfort and stability of the user during operation.

[0041] Preferably, as Figures 1-5 As shown, the outer cylinder 300 is provided on the outer side wall with a limiting block 140 protruding to block the upward movement of the outer cylinder 300; the limiting block 140 can ensure that the outer cylinder 300 does not accidentally move upward during operation, thereby ensuring the stability and safety of the liquid taking process.

[0042] Preferably, as Figures 1-5 As shown, the outer side wall of the cleaning ring 400 is provided with a clamping groove 410 for the free end of the elastic rod 320 to extend into; the clamping groove 410 enables the free end of the elastic rod 320 to smoothly insert into the clamping groove 410, thereby fixing the position of the cleaning ring 400 on the outer cylinder 300 and ensuring the stability of the connection between the elastic rod 320 and the cleaning ring 400; specifically, the elastic rod 320 is L-shaped.

[0043] Preferably, as Figure 1 , Figure 2 and Figure 4 As shown, the side of the elastic rod 320 facing the sampling cylinder 100 is provided with a moving block 321 protruding, and the outer side wall of the sampling cylinder 100 is provided with a fixed block 120 protruding, and the fixed block 120 is located on the movement track of the moving block 321; since the fixed block 120 is located on the movement track of the moving block 321, when the outer cylinder 300 is operated to move the elastic rod 320 downward to contact the fixed block 120 after the moving block 321, the fixed block 120 can force the elastic rod 320 to deviate away from the outer cylinder 300, thereby enabling the free end of the moving rod to exit the clamping groove of the cleaning ring 400, enabling the cleaning ring 400 to automatically fall off, without the user needing to touch the used cleaning ring 400, so that the replacement of the cleaning ring 400 is faster and more sanitary.

[0044] Preferably, asFigure 5 as well as Figure 7 As shown, in another embodiment, the sampling cylinder 100 is provided with a sliding groove 101, the fixed block 120 is located in the sliding groove 101, and the moving block 321 is slidably disposed in the sliding groove 101; the sliding groove 101 can restrict the movement trajectory of the moving block 321, thereby restricting the movement trajectory of the elastic rod 320 and the outer cylinder 300, ensuring that the fixed block 120 is on the movement trajectory of the moving block 321, but the thickness of the side wall of the outer cylinder 300 needs to be increased.

[0045] Preferably, such as Figure 4 , Figure 5 , Figure 6 as well as Figure 10 As shown, an elastic pad 330 is fixed on the inner wall of the outer cylinder 300, which contacts the outer wall of the sampling cylinder 100. The side of the elastic pad 330 facing the sampling cylinder 100 is serrated. The serrated elastic pad 330 design can increase the friction coefficient of the contact surface between the outer cylinder 300 and the sampling cylinder 100, and provide a self-locking function to a certain extent, further improving the safety of the sampling process.

[0046] Preferably, as shown in 10, the outer wall of the sampling cylinder 100 and the inner wall of the outer cylinder 300 are conical in shape, which makes the outer cylinder 300 more and more tightly contacted and fixed with the sampling cylinder 100 as it moves upward, and more flexible as it moves downward, making it convenient to operate.

[0047] Specifically, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figure 7 As shown, the moving block 321 and the fixed block 120 are wedge-shaped blocks with two inclined surfaces facing each other, allowing the elastic rod 320 to deflect more smoothly.

[0048] Specifically, such as Figures 1-5 As shown, the top of the sampling cylinder 100 is provided with a flange 130 to facilitate user operation of the piston assembly.

[0049] Specifically, such as Figure 8 As shown, the above-mentioned elastic rods 320 can be set to four, so that the cleaning ring 400 can be connected to four elastic rods 320 at the same time; so that the cleaning ring 400 is more firmly connected to the outer cylinder 300.

[0050] Specifically, both the sampling cylinder 100 and the outer cylinder 300 are made of transparent materials, such as plastic, to facilitate observation of the liquid condition inside the sampling cylinder 100. More specifically, liquid scales can also be set on the outer wall of the sampling cylinder 100.

[0051] Specifically, the elastic rod 320 can be made of elastic plastic.

[0052] The above are only preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical solutions, several modified and improved technical solutions should also be considered to fall within the scope of the present application.

Claims

1. A chemical liquid taking device characterized by comprising: Including sampling cylinder, piston assembly, outer cylinder and cleaning ring; the bottom end of the sampling cylinder is provided with a sampling head, and the top end is provided with an opening, and the inside of the sampling cylinder is provided with a piston assembly; The outer cylinder is slidably connected to the outside wall of the sampling cylinder, and at least two elastic rods are arranged on the outer cylinder, one end of the elastic rod is fixedly connected with the outer cylinder, and the other end is a free end connected with the cleaning ring, and the inner side wall of the cleaning ring is in contact with the outer side wall of the sampling head; The outer side wall of the cleaning ring is provided with a clamping groove for the free end of the elastic rod to extend into; the side of the elastic rod facing the sampling cylinder is provided with a moving block, and the outer side wall of the sampling cylinder is provided with a fixed block, and the fixed block is located on the moving track of the moving block.

2. The chemical liquid taking apparatus according to claim 1, characterized by The piston assembly comprises a piston rod and a piston head connected to the end of the piston rod.

3. The chemical liquid taking apparatus according to claim 1, characterized by: The inner side wall of the cleaning ring is fixedly connected with a rubber ring and a sponge ring, and the rubber ring is located below the sponge ring.

4. The chemical liquid taking apparatus according to claim 1, characterized by: The outer side wall of the outer cylinder is provided with oppositely arranged pinch grooves.

5. The chemical liquid taking apparatus according to claim 1, characterized by: The outer cylinder is provided with a limiting block protruding outward to block the upward movement of the outer cylinder.

6. The chemical liquid taking apparatus according to claim 1, characterized by: The sampling cylinder is provided with a sliding groove, and the fixed block is located in the sliding groove, and the moving block is slidably arranged in the sliding groove.

7. The chemical liquid taking apparatus according to claim 1, characterized by: The inner side wall of the outer cylinder is fixedly connected with an elastic pad in contact with the outer side wall of the sampling cylinder, and the side of the elastic pad facing the sampling cylinder is serrated.

8. The chemical liquid taking apparatus according to claim 1, characterized by: The outer side wall of the sampling cylinder and the inner side wall of the outer cylinder are tapered and matched with each other.

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