Sampling device for chemical engineering

Abstract

The utility model discloses a sampling device for chemical engineering, and relates to the technical field of sampling devices, the sampling device comprises a suction tube main body consisting of a sampling tube and an air bag, and a pressing assembly, the pressing assembly is used for realizing different degrees of pressing operation of the air bag; the pressing assembly comprises an elliptical ball sleeve, an opening groove and a pressing arc piece; the pressing arc pieces are pressed to deform and extrude the air bag to achieve pressing operation of the air bag, and the pressing degree of the air bag is controlled by pressing the number of the pressing arc pieces. According to the quantitative sampling device, the pressing degree of the air bag can be controlled by arranging the pressing assembly, the amount of the sample which can be extracted can be judged through the quantitative piston before the sample is sucked, the sampling amount can be accurately controlled in cooperation with the marking of the second scale mark on the sampling amount, and the quantitative sampling effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, specifically a sampling device for chemical engineering. Background Technology

[0002] In chemical engineering experiments, sampling devices are frequently used. Currently, the sampling devices used are generally pipettes. However, when sampling chemical solutions with pipettes, it is not easy to determine the sample volume, and the sample volume often exceeds the required amount. Afterward, the excess sample needs to be put back into the original storage bottle. Based on this, in order to further improve the sampling accuracy of pipettes, a sampling device for chemical engineering is provided. Utility Model Content

[0003] The purpose of this invention is to provide a sampling device for chemical engineering in order to solve the problems mentioned above.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sampling device for chemical engineering, comprising a pipette body consisting of a sampling tube and an air bladder, wherein the air bladder is fixed to the top of the sampling tube and the inner cavities of the air bladder and the sampling tube are interconnected, and a pressing component is provided on the outside of the sampling tube and the air bladder, wherein the pressing component is used to realize different degrees of pressing operation of the air bladder;

[0005] The pressing component includes an elliptical ball sleeve, an opening groove, and a pressing arc plate;

[0006] The bottom of the elliptical sleeve is fixed to the outside of the sampling tube and the elliptical sleeve wraps around the outside of the airbag. The opening grooves are symmetrically opened on both sides of the outer wall of the elliptical sleeve. The elliptical sleeve forms a pressing arc piece through the opening groove. Multiple pressing arc pieces are evenly arranged vertically.

[0007] Pressing the pressing arc plate deforms and compresses the airbag to achieve the airbag compression operation. The degree of airbag compression is controlled by adjusting the number of pressing arc plates.

[0008] As a further improvement of this utility model: a quantitative piston of the pressing component is slidably connected to the inner side of the sampling tube near the airbag, and the outer diameter of the quantitative piston of the pressing component matches the inner diameter of the sampling tube.

[0009] As a further improvement of this utility model: a first scale line is provided on the outer side of the sampling tube at a position corresponding to the moving area of ​​the quantitative piston of the pressing component, and the upper surface of the initial position of the quantitative piston of the pressing component is aligned with the zero scale line of the first scale line.

[0010] As a further improvement of this utility model: a second scale line is provided at the bottom of the outer side of the sampling tube, and the zero scale line of the second scale line is flush with the bottom of the sampling tube.

[0011] As a further improvement of this utility model, the elliptical ball sleeve, the opening groove, and the pressing arc piece are integrally formed by rubber injection molding.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The pressure level of the airbag can be controlled by setting up a pressing component. The quantitative piston can determine the amount of sample that can be extracted before the sample is drawn. With the second scale marking the sample amount, the sample amount can be precisely controlled, achieving the effect of quantitative sampling. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the straw body and pressing component of this utility model;

[0016] Figure 3 This is another cross-sectional view of the straw body and pressing component of this utility model.

[0017] In the diagram: 1. Straw body; 101. Sampling tube; 102. Airbag; 2. Pressing assembly; 201. Elliptical ball sleeve; 202. Opening groove; 203. Pressing arc plate; 3. Metering piston; 4. First scale line; 5. Second scale line. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-3 In this embodiment of the present invention, a sampling device for chemical engineering includes a pipette body 1 consisting of a sampling tube 101 and an air bladder 102. The air bladder 102 is fixed to the top of the sampling tube 101, and the inner cavities of the air bladder 102 and the sampling tube 101 are interconnected. A pressing component 2 is provided on the outside of the sampling tube 101 and the air bladder 102. The pressing component 2 is used to realize different degrees of pressing operation of the air bladder 102.

[0020] The pressing component 2 includes an elliptical ball sleeve 201, an opening groove 202, and a pressing arc plate 203;

[0021] The bottom of the elliptical sleeve 201 is fixed to the outside of the sampling tube 101 and the elliptical sleeve 201 wraps around the outside of the airbag 102. The opening groove 202 is symmetrically opened on both sides of the outer wall of the elliptical sleeve 201. The elliptical sleeve 201 forms a pressing arc piece 203 through the opening groove 202. Multiple pressing arc pieces 203 are evenly arranged vertically.

[0022] The airbag 102 is compressed by pressing the pressing arc plate 203 to deform it. The pressing operation of the airbag 102 is achieved by adjusting the number of pressing arc plates 203.

[0023] A pressing assembly metering piston 3 is slidably connected to the inner side of the sampling tube 101 near the airbag 102. The outer diameter of the pressing assembly metering piston 3 matches the inner diameter of the sampling tube 101.

[0024] A first scale line 4 is provided on the outer side of the sampling tube 101 at a position corresponding to the moving area of ​​the metering piston 3 of the pressing component. The upper surface of the metering piston 3 of the pressing component at its initial position is aligned with the zero scale line of the first scale line 4.

[0025] A second scale line 5 is provided at the bottom of the outer side of the sampling tube 101, and the zero scale line of the second scale line 5 is flush with the bottom of the sampling tube 101.

[0026] In this embodiment, it should be noted that the sampling tube 101 is made of transparent material, allowing the movement of the quantitative piston 3 to be observed. The method of using this sampling device is as follows:

[0027] Hold the elliptical ball sleeve 201 on the outside and press the area of ​​the pressing arc plate 203. The pressing arc plate 203 deforms inward and completely squeezes the air bag 102. The air in the air bag 102 flows into the sampling tube 101. This air can push the positioning piston 3 to move down. At this time, the positioning piston 3 squeezes the air below the sampling tube 101 and moves it out. Then, insert the sampling tube 101 into the reagent bottle to be sampled. Release the pressing arc plate 203. The pressing arc plate 203 and the air bag 102 reset under their respective elastic forces. The reset of the air bag 102 generates negative pressure, which causes the quantitative piston 3 to move up. The upward movement of the quantitative piston 3 generates negative pressure inside the sampling tube 101. This negative pressure can draw the reagent into the sampling tube 101. Thus, a single sampling operation is completed.

[0028] During the above operation, the pressure level of the airbag 102 can be controlled by pressing different numbers of pressing arc plates 203 at a time. The corresponding positioning piston 3 also moves down to different heights. At this time, the scale value corresponding to the first scale line 4 and the upper surface of the positioning piston 3 indicates the amount of reagent aspirated by the airbag 102 when the pressing arc plate 203 is released. In this way, through the cooperation of the above-mentioned multiple parts, the amount of reagent that can be aspirated can be quickly and accurately determined, thereby realizing quantitative sampling of the sample.

[0029] Meanwhile, when the reagent is drawn into the sampling tube 101, the value of the second scale line 5 corresponding to the reagent liquid level is the sampling amount, which is used to further determine the sample sampling amount.

[0030] Please refer to this carefully. Figures 1-2 The elliptical ball sleeve 201, the opening groove 202, and the pressing arc piece 203 are integrally formed by rubber injection molding.

[0031] In this embodiment, the elliptical spherical sleeve 201 can be symmetrically divided into two arc-shaped parts. Two sets of opening grooves 202 and pressing arc plates 203 are respectively formed on the two arc-shaped parts. Then, the two arc-shaped parts are joined together and sleeved on the outside of the sampling tube 101 and the airbag 102. The two arc-shaped parts are fixed together with each other and with the sampling tube 101 by adhesive. Its production and assembly process is simple and easy to promote and use.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sampling device for chemical engineering, comprising a suction tube body (1) consisting of a sampling tube (101), an air bag (102), the air bag (102) being fixed to the top of the sampling tube (101), and the air bag (102) and the inner cavity of the sampling tube (101) being in communication with each other, characterized in that, The sampling tube (101) and the air bag (102) are provided with a pressing assembly (2) outside, which is used to realize different degrees of pressing operation of the air bag (102). The pressing assembly (2) comprises an oval sleeve (201), an open slot (202) and a pressing arc piece (203). The bottom of the oval sleeve (201) is fixed outside the sampling tube (101), and the oval sleeve (201) is wrapped outside the air bag (102). The open slot (202) is symmetrically arranged on the outer wall of the oval sleeve (201). The oval sleeve (201) is formed by the open slot (202) to form the pressing arc piece (203). The pressing arc piece (203) is uniformly arranged along the vertical direction. The pressing arc piece (203) is deformed and extruded to press the air bag (102) to realize the pressing operation of the air bag (102). The number of the pressing arc piece (203) is adjusted to control the pressing degree of the air bag (102).

2. A sampling device for chemical engineering according to claim 1, characterized in that The inside of the sampling tube (101) is slidably connected with a pressing assembly quantitative piston (3) near the air bag (102). The outer wall diameter of the pressing assembly quantitative piston (3) matches the inner wall diameter of the sampling tube (101).

3. A sampling device for chemical engineering according to claim 2, characterized in that The outer side of the sampling tube (101) is provided with a first scale line (4) corresponding to the moving area of the pressing assembly quantitative piston (3). The upper surface of the initial position of the pressing assembly quantitative piston (3) is aligned with the zero scale line of the first scale line (4).

4. The sampling device for chemical engineering according to claim 1, characterized in that, The outer side of the sampling tube (101) is provided with a second scale line (5) at the bottom. The zero scale line of the second scale line (5) is flush with the bottom end of the sampling tube (101).

5. The sampling device for chemical engineering according to claim 1, characterized in that, The oval sleeve (201), the open slot (202) and the pressing arc piece (203) are integrally formed by a rubber injection molding process.

Images