Gas sampling device for analytical chemistry test

Abstract

The utility model belongs to the field of gas sampling devices, and particularly relates to a gas sampling device for an analytical chemistry test, which comprises a sampling barrel, a positioning plate is arranged in an inner cavity of the sampling barrel, a fixing rod is fixedly connected to the top of the positioning plate, and the top of the fixing rod penetrates through the sampling barrel and is fixedly connected with a pressing block. The bottom of the sampling barrel is communicated with a gas outlet pipe, a sampling assembly is arranged on the right side of the sampling barrel, and the sampling assembly comprises a gas connecting pipe; by arranging the sampling assembly, impurities in chemical flue gas can be filtered out under the action of the sampling assembly, meanwhile, after a connector is detached, a user can conveniently take out and replace a conical filter screen, the filtering efficiency of the chemical flue gas is improved, and the problem that when an existing gas sampling device is used for extracting the chemical flue gas, the filtering efficiency is high is solved. The problem that the flue gas sampling efficiency is reduced due to the fact that the flue gas needs to be subjected to impurity removal through a filter screen and the filter screen is small in size and inconvenient to install in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of gas sampling devices, in particular to a gas sampling device for analytical chemical experiments. Background Art

[0002] Analytical chemistry is a science that studies analytical methods and theories for studying chemical information such as the composition, content, structure and morphology of substances. It is an important branch of chemistry. Its main purpose is to identify the components contained in a substance, determine the relative content of various components, study the molecular structure or crystal structure of the substance, etc. In analytical chemistry experiments, it is sometimes necessary to sample the flue gas generated by the chemical experiment.

[0003] When the existing gas sampling device extracts chemical flue gas, it needs to remove impurities from the flue gas through a filter. However, since the filter is small in size and inconvenient to install, the flue gas sampling efficiency is reduced. Therefore, a gas sampling device for analytical chemical experiments is proposed to address the above problems. Utility Model Content

[0004] In order to make up for the shortcomings of the prior art, the utility model proposes a gas sampling device for analytical chemical experiments and solves the problem that the existing gas sampling device needs to remove impurities from the flue gas through a filter when extracting chemical flue gas, but the filter is small in size and inconvenient to install, thereby reducing the flue gas sampling efficiency.

[0005] The utility model solves the technical problem by adopting the following technical solution: a gas sampling device for analytical chemical experiments, comprising a sampling cylinder, the inner cavity of the sampling cylinder is provided with a positioning plate, the top of the positioning plate is fixedly connected with a fixing rod, the top of the fixing rod passes through the sampling cylinder and is fixedly connected with a pressing block, the bottom of the sampling cylinder is connected with an air outlet pipe, and a sampling assembly is provided on the right side of the sampling cylinder;

[0006] The sampling assembly includes a gas connecting tube, the left side of the gas connecting tube is fixedly connected to the inner cavity of the sampling tube, the inner cavity of the gas connecting tube is provided with a conical filter, the right side of the gas connecting tube is provided with a connecting head, the right side of the connecting head is fixedly connected to the sampling tube, the left side of the sampling tube is connected to the right side of the gas connecting tube, and the right side of the sampling tube is fixedly connected to the sampling head.

[0007] Preferably, the surface of the gas connecting pipe is provided with an external thread, the inner cavity of the connecting head is provided with an internal thread, and the external thread and the internal thread are used in combination.

[0008] Preferably, the inner cavity of the sampling tube is provided with a positioning frame, the positioning frame and the sampling tube are an integrally formed structure, and the left side of the positioning frame contacts the right side of the conical filter screen.

[0009] By providing a positioning frame, the conical filter net can be positioned, thereby improving the stability of the conical filter net during use.

[0010] Preferably, the gas connecting tube is made of medical silicone, and a first flow-stop clamp is sleeved on the surface of the gas connecting tube.

[0011] Preferably, the sampling tube is made of transparent glass, and a volume scale is provided on the surface of the sampling tube.

[0012] By setting the capacity scale, it is convenient for users to observe the gas sampling capacity and improve the sampling efficiency.

[0013] Preferably, a sealing ring is sleeved on the surface of the positioning plate, and the surface of the sealing ring contacts the inner wall of the sampling tube.

[0014] Preferably, the air outlet pipe is made of medical silicone material, and a second flow-stop clamp is provided on the surface of the air outlet pipe.

[0015] The utility model is beneficial in that:

[0016] The utility model is provided with a sampling component, which can filter impurities in chemical smoke under the action of the sampling component. After the connector is disassembled, it is convenient for the user to take out and replace the conical filter, thereby improving the filtering efficiency of the chemical smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a gas sampling device for analytical chemical experiments of the utility model;

[0019] Figure 2 It is a structural cross-sectional view of the sampling tube and the sampling assembly of the utility model;

[0020] Figure 3 For the utility model Figure 2 A magnified view of the structure at center A;

[0021] Figure 4 For the utility model Figure 2 A magnified view of the structure at B in the middle;

[0022] Figure 5 It is a structural cross-sectional view of the conical filter screen, the connector and the sampling tube of the utility model.

[0023] In the figure: 1. sampling tube; 2. positioning plate; 3. fixing rod; 4. pressure block; 5. air outlet pipe; 6. sampling assembly; 601. gas connecting pipe; 602. conical filter screen; 603. connecting head; 604. sampling tube; 605. sampling head; 606. external thread; 607. internal thread; 608. positioning frame; 609. first stop clamp; 7. capacity scale; 8. sealing ring; 9. second stop clamp. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The following is combined with Figure 1-5 To further explain this application in detail,

[0026] The present application embodiment discloses a gas sampling device for analytical chemical experiments. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A gas sampling device for analytical chemical experiments, comprising a sampling tube 1, an inner cavity of the sampling tube 1 is provided with a positioning plate 2, a fixing rod 3 is fixedly connected to the top of the positioning plate 2, a top of the fixing rod 3 passes through the sampling tube 1 and is fixedly connected to a pressing block 4, a bottom of the sampling tube 1 is connected with an air outlet pipe 5, and a sampling assembly 6 is provided on the right side of the sampling tube 1;

[0027] The sampling component 6 includes a gas connecting tube 601, the left side of the gas connecting tube 601 is fixedly connected to the inner cavity of the sampling tube 1, the inner cavity of the gas connecting tube 601 is provided with a conical filter screen 602, the right side of the gas connecting tube 601 is provided with a connector 603, the right side of the connector 603 is fixedly connected to a sampling tube 604, the left side of the sampling tube 604 is connected to the right side of the gas connecting tube 601, and the right side of the sampling tube 604 is fixedly connected to a sampling head 605; by setting up the sampling component 6, impurities in the chemical fume can be filtered under the action of the sampling component 6, and after the connector 603 is disassembled, it is convenient for the user to take out and replace the conical filter screen 602, thereby improving the filtering efficiency of the chemical fume.

[0028] Reference Figure 4 and Figure 5An external thread 606 is provided on the surface of the gas connecting pipe 601, and an internal thread 607 is provided in the inner cavity of the connecting head 603. The external thread 606 and the internal thread 607 are used in conjunction with each other; through the cooperation between the external thread 606 and the internal thread 607, it is convenient for users to install and disassemble the connecting head 603, thereby improving work efficiency.

[0029] Reference Figure 5 The inner cavity of the sampling tube 604 is provided with a positioning frame 608, and the positioning frame 608 and the sampling tube 604 are an integrally formed structure. The left side of the positioning frame 608 contacts the right side of the conical filter 602; by setting the positioning frame 608, the conical filter 602 can be positioned, thereby improving the stability of the conical filter 602 during use.

[0030] Reference Figure 1 and Figure 2 The gas connecting tube 601 is made of medical silicone, and a first flow-stopping clamp 609 is sleeved on the surface of the gas connecting tube 601 ; by setting the first flow-stopping clamp 609 , the gas connecting tube 601 made of silicone can be clamped to prevent the air in the air outlet pipe 5 from flowing.

[0031] Reference Figure 1 The sampling tube 1 is made of transparent glass, and a capacity scale 7 is provided on the surface of the sampling tube 1. By providing the capacity scale 7, it is convenient for the user to observe the gas sampling capacity, thereby improving the sampling efficiency.

[0032] Reference Figure 3 A sealing ring 8 is sleeved on the surface of the positioning plate 2, and the surface of the sealing ring 8 contacts the inner wall of the sampling tube 1; by providing the sealing ring 8, the sealing performance of the connection between the positioning plate 2 and the sampling tube 1 can be improved, avoiding the contact between the air in the inner cavity of the sampling tube 1 and the chemical smoke, which affects the detection quality.

[0033] Reference Figure 1 and Figure 2 The air outlet pipe 5 is made of medical silicone material, and a second flow-stopping clamp 9 is sleeved on the surface of the air outlet pipe 5 ; by providing the second flow-stopping clamp 9 , the air outlet pipe 5 made of silicone material can be clamped to prevent the air in the air outlet pipe 5 from flowing.

[0034] Working principle: When in use, the user closes the second stop-flow clamp 9 to block the air outlet pipe 5, then inserts the sampling head 605 into the container to be sampled, and pulls the pressure block 4 upwards. The pressure block 4 drives the fixing rod 3 upwards when it moves upwards, and the fixing rod 3 drives the positioning plate 2 and the sealing ring 8 upwards when it moves upwards, so that a negative pressure cavity is formed inside the sampling tube 1, so that the smoke in the container to be sampled can be sucked into the inner cavity of the sampling tube 1. During the extraction process, impurities in the smoke can be filtered through the conical filter mesh 602. After the extraction is completed, the user closes the first stop-flow clamp 609 to block the gas connecting tube 601. When the user needs to filter the sampling tube 1, open the second stop clamp 9 to connect the air outlet pipe 5 with the detection device, then press the pressing block 4 downward, the pressing block 4 drives the fixing rod 3 to move downward when moving downward, the fixing rod 3 drives the positioning plate 2 and the sealing ring 8 to move when moving downward, and compresses the smoke to the detection device. After long-term use, the surface of the conical filter 602 is easily blocked, thereby affecting the gas sampling efficiency. When the user needs to replace the conical filter 602, rotate the connector 603. Since the connector 603 and the gas connecting pipe 601 are threadedly connected, when the connector 603 is removed, the conical filter 602 can be taken out from the inner cavity of the gas connecting pipe 601.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A gas sampling device for analytical chemical experiments, characterized in that: The sampling tube (1) comprises a positioning plate (2) provided in the inner cavity of the sampling tube (1), a fixing rod (3) fixedly connected to the top of the positioning plate (2), the top of the fixing rod (3) passing through the sampling tube (1) and fixedly connected to a pressing block (4), the bottom of the sampling tube (1) being connected to an air outlet pipe (5), and a sampling assembly (6) being provided on the right side of the sampling tube (1); The sampling assembly (6) comprises a gas connecting tube (601), the left side of the gas connecting tube (601) is fixedly connected to the inner cavity of the sampling tube (1), the inner cavity of the gas connecting tube (601) is provided with a conical filter (602), the right side of the gas connecting tube (601) is provided with a connecting head (603), the right side of the connecting head (603) is fixedly connected to a sampling tube (604), the left side of the sampling tube (604) is connected to the right side of the gas connecting tube (601), and the right side of the sampling tube (604) is fixedly connected to a sampling head (605).

2. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: The surface of the gas connecting pipe (601) is provided with an external thread (606), and the inner cavity of the connecting head (603) is provided with an internal thread (607), and the external thread (606) and the internal thread (607) are used in conjunction with each other.

3. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: The inner cavity of the sampling tube (604) is provided with a positioning frame (608), the positioning frame (608) and the sampling tube (604) are an integrally formed structure, and the left side of the positioning frame (608) is in contact with the right side of the conical filter screen (602).

4. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: The gas connecting tube (601) is made of medical silica gel, and a first flow-stopping clamp (609) is sleeved on the surface of the gas connecting tube (601).

5. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: The sampling tube (1) is made of transparent glass, and a volume scale (7) is provided on the surface of the sampling tube (1).

6. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: A sealing ring (8) is sleeved on the surface of the positioning plate (2), and the surface of the sealing ring (8) is in contact with the inner wall of the sampling tube (1).

7. A gas sampling device for analytical chemical experiments according to claim 1, characterized in that: The air outlet pipe (5) is made of medical silica gel, and the surface of the air outlet pipe (5) is sleeved with a second flow-stopping clamp (9).

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