VOCs detection instrument sampling device

Abstract

The utility model relates to the technical field of VOCs (Volatile Organic Compounds) sampling, and discloses a sampling device of a VOCs detection instrument, which comprises a sampling box; the supporting plate is arranged in the sampling box; the sampling mechanism is arranged in the middle of the supporting plate; the sampling mechanism comprises a gas tank arranged in the middle of the supporting plate, a gas inlet is formed in the top of the gas tank, a first piston is attached to the interior of the gas inlet, and gas is controlled to enter and exit through the first piston. Negative pressure is formed in the gas tanks by rotating the second rotating button, the gas inlet is opened by rotating the first rotating button, gas enters the gas tanks to be collected, compared with a traditional device, the device is small in size and convenient to carry, gas in different areas can be collected at a time through the arrangement of the multiple gas tanks, and the gas collecting efficiency is improved. In addition, gas can be collected under the action of pressure difference, the gas collection effect is greatly improved, the gas tank is placed in the sampling box, the influence of temperature on the gas can be effectively prevented, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of VOCs sampling, and more specifically, to a sampling device for a VOCs detection instrument. Background Art

[0002] A gas sampling device is a device that collects air and then facilitates detection and analysis. It detects harmful gases in the air. The gas sampling device can collect gas more accurately, which helps the accuracy of detection. VOCs refer to volatile organic compounds, which are mostly present in various industrial sources. Factories and enterprises will produce various waste gases during their daily processing and operations. The waste gas needs to be transported to the waste gas treatment system for harmless treatment and can only be discharged after meeting the standards. The waste gas contains a large amount of VOCs, and its content needs to be measured. Therefore, a collection device is needed to collect VOCs. When collecting gas, the existing collection device is not convenient to carry due to its limited space and large size. It also needs to go back and forth many times when collecting gas from different areas, thereby reducing the efficiency of collecting gas. In addition, the existing device is not effective in collecting gas through natural air intake, and it is easy to change the properties of the gas at high temperatures, which affects the detection data, so it needs to be improved. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a VOCs detection instrument sampling device, which has the advantage of improving the VOCs sampling effect.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a VOCs detection instrument sampling device, comprising:

[0005] Sampling box;

[0006] A support plate, which is arranged inside the sampling box;

[0007] A sampling mechanism, which is arranged in the middle of the support plate;

[0008] The sampling mechanism includes a gas tank arranged in the middle of the support plate, an air inlet is opened on the top of the gas tank, a piston 1 is attached to the inside of the air inlet, and the gas in and out is controlled by the piston 1, a moving rod is fixedly arranged above the piston 1, and the moving rod extends to the top of the gas tank, and a knob 1 is fixedly arranged above the moving rod;

[0009] The air extraction mechanism is arranged inside the gas tank.

[0010] As a preferred technical solution of the utility model,

[0011] Also included are:

[0012] A handle, which is arranged above the support plate;

[0013] A limiting groove is provided on the outer side of the gas tank;

[0014] A fixing mechanism, which is arranged inside the supporting plate;

[0015] The fixing mechanism includes a fixing groove opened inside the support plate, a compression spring is fixedly arranged inside the fixing groove, the inner side of the compression spring is elastically connected to a limiting block, and the limiting block extends to the inside of the limiting groove.

[0016] As a preferred technical solution of the utility model,

[0017] The air extraction mechanism includes a second piston movably arranged inside the gas tank, a transmission rod is fixedly arranged below the second piston, and the transmission rod penetrates and engages with the bottom of the gas tank and extends below it, and a second rotating knob is fixedly arranged below the transmission rod.

[0018] As a preferred technical solution of the utility model,

[0019] Also included are:

[0020] A fixed plate, which is arranged on the outer side of the moving rod and is engaged with the moving rod;

[0021] The support column is arranged between the fixing plate and the gas tank.

[0022] As a preferred technical solution of the utility model,

[0023] The inner side of the limit block is arc-shaped, and when it plays a fixing role, it fits tightly with the gas tank inside the limit groove. The arc-shaped design of the inner side of the limit block makes it fit tightly with the outer side of the gas tank, thereby supporting the gas tank.

[0024] As a preferred technical solution of the utility model,

[0025] The outer side of the piston 1 is provided with a rubber sleeve which fits with the air inlet, and the outer side of the piston 2 is also provided with a rubber sleeve which fits with the gas tank.

[0026] As a preferred technical solution of the utility model,

[0027] An anti-sliding block is fixedly arranged on the outer side of the rotating button 1 in a circular array on the outer side of the rotating button 1, and an anti-sliding block is also arranged on the outer side of the rotating button 2.

[0028] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0029] 1. The utility model forms a negative pressure inside the gas tank by turning the second knob, and opens the air inlet by turning the first knob, allowing the gas to enter the gas tank for collection. Compared with the traditional device, this device is compact and easy to carry. By setting up multiple gas tanks, gases from different regions can be collected at one time. In addition, gas can be collected by the effect of pressure difference, which greatly improves the gas collection effect. Moreover, placing the gas tank inside the sampling box can effectively prevent the influence of temperature on the gas, thereby improving the accuracy of detection.

[0030] 2. The utility model uses the elastic action of the compression spring to fix the gas tank with the limit block. Compared with the traditional device, this device can not only fix the gas tank in the middle of the support plate, but also collect the gas when the gas tank is fixed without disassembling the gas tank, thereby improving the efficiency of collecting gas. In addition, the gas tank can be quickly replaced, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the fixed plate of the utility model;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of the gas tank of the utility model;

[0034] Figure 4 This is a schematic diagram of the cross-sectional structure of the fixing plate of the utility model from top view;

[0035] Figure 5 For this utility model Figure 3 Schematic diagram of the structure at A in the middle;

[0036] Figure 6 For this utility model Figure 3 Schematic diagram of the structure at point B in the middle.

[0037] In the figure: 1. sampling box; 2. support plate; 3. gas tank; 4. air inlet; 5. piston 1; 6. moving rod; 7. knob 1; 8. fixed plate; 9. support column; 10. piston 2; 11. transmission rod; 12. knob 2; 13. limit groove; 14. fixed groove; 15. compression spring; 16. limit block; 17. handle. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figures 1 to 6 As shown, the utility model provides a VOCs detection instrument sampling device, including:

[0040] Sampling box 1;

[0041] A support plate 2, which is arranged inside the sampling box 1;

[0042] A sampling mechanism, which is arranged in the middle of the support plate 2;

[0043] The sampling mechanism includes a gas tank 3 arranged in the middle of the support plate 2, an air inlet 4 is opened on the top of the gas tank 3, a piston 5 is attached to the inside of the air inlet 4, and the gas inlet and outlet are controlled by the piston 5, a moving rod 6 is fixedly arranged above the piston 5, and the moving rod 6 extends to the top of the gas tank 3, and a knob 7 is fixedly arranged above the moving rod 6;

[0044] An air extraction mechanism, which is arranged inside the gas tank 3;

[0045] When collecting gas, firstly, by rotating the second knob 12, the second knob 12 drives the transmission rod 11 to rotate, and the transmission rod 11 drives the second piston 10 to move downward, so that negative pressure is formed inside the gas tank 3. Then, by rotating the first knob 7, the first knob 7 drives the moving rod 6 to rotate, and the moving rod 6 drives the piston 15 to move upward to open the air inlet 4, so that the gas enters the interior of the gas tank 3.

[0046] By turning knob 2 12, negative pressure is formed inside the gas tank 3, and by turning knob 1 7, the air inlet 4 is opened, allowing the gas to enter the gas tank 3 for collection. Compared with traditional devices, this device is compact and easy to carry. By setting up multiple gas tanks 3, gases from different regions can be collected at one time. In addition, gas can be collected through the effect of pressure difference, which greatly improves the gas collection effect. Placing the gas tank 3 inside the sampling box 1 can effectively prevent the influence of temperature on the gas, thereby improving the accuracy of detection.

[0047] Among them, also include:

[0048] A handle 17, which is arranged above the support plate 2;

[0049] A limiting groove 13, which is opened on the outer side of the gas tank 3;

[0050] A fixing mechanism, which is arranged inside the support plate 2;

[0051] The fixing mechanism includes a fixing groove 14 opened inside the support plate 2, a compression spring 15 is fixedly arranged inside the fixing groove 14, the inner side of the compression spring 15 is elastically connected to a limiting block 16, and the limiting block 16 extends to the inside of the limiting groove 13;

[0052] When replacing the gas cylinder 3, first pull the handle 17 to pull the support plate 2 out of the sampling box 1. When replacing and installing the gas cylinder 3, insert the gas cylinder 3 into the middle of the support plate 2. At this time, the outer side of the gas cylinder 3 squeezes the limit block 16, so that the limit block 16 moves toward the inner side of the fixing groove 14. When the gas cylinder 3 moves downward to the limit groove 13 and is opposite to the fixing groove 14, the limit block 16 extends into the inner side of the limit groove 13 under the elastic action of the compression spring 15 to fix the gas cylinder 3.

[0053] The limit block 16 fixes the gas tank 3 through the elastic action of the compression spring 15. Compared with the traditional device, this device can not only fix the gas tank 3 in the middle of the support plate 2, but also collect the gas when the gas tank 3 is fixed, without disassembling the gas tank 3, thereby improving the efficiency of collecting gas. In addition, the gas tank 3 can be quickly replaced, thereby improving work efficiency.

[0054] The air extraction mechanism includes a piston 10 movably disposed inside the gas tank 3, a transmission rod 11 is fixedly disposed below the piston 10, and the transmission rod 11 penetrates and engages with the bottom of the gas tank 3 and extends below it, and a rotary knob 12 is fixedly disposed below the transmission rod 11;

[0055] When collecting gas, the second knob 12 is rotated to drive the transmission rod 11 to rotate. When the transmission rod 11 rotates, the second piston 10 is driven to move downward, so that negative pressure is formed inside the gas tank 3.

[0056] Among them, also include:

[0057] a fixed plate 8, which is disposed on the outer side of the moving rod 6 and engages with the moving rod 6;

[0058] The support column 9 is arranged between the fixing plate 8 and the gas tank 3 .

[0059] Through the fixing effect between the fixing plate 8 and the support column 9, the air inlet 4 can be opened or closed by turning the knob 7, so as to facilitate the collection of gas;

[0060] Among them, the inner side of the limit block 16 is arc-shaped, and when it plays a fixing role, it fits tightly with the gas tank 3 inside the limit groove 13. Through the arc-shaped design of the inner side of the limit block 16, it fits tightly with the outer side of the gas tank 3, thereby supporting the gas tank 3.

[0061] Among them, a rubber sleeve is provided on the outer side of the piston 1 5 to fit with the air inlet 4, and a rubber sleeve is also provided on the outer side of the piston 2 10 to fit with the gas tank 3. By providing the rubber sleeve, the airtightness of the gas tank 3 can be improved to prevent gas leakage.

[0062] Among them, an anti-sliding block is fixedly provided on the outer side of the turning button 1 7, which is in a circular array on the outer side of the turning button 1 7, and an anti-sliding block is also provided on the outer side of the turning button 2 12. Through the setting of the anti-sliding block, when the turning button 1 7 and the turning button 2 12 are rotated, the friction when they are in contact can be increased, and they can be easily rotated, thereby improving work efficiency.

[0063] The working principle and use process of this utility model:

[0064] When collecting gas, first, by turning the knob 2 12, the knob 2 12 drives the transmission rod 11 to rotate. When the transmission rod 11 rotates, it drives the piston 2 10 to move downward, so that negative pressure is formed inside the gas tank 3. At this time, by turning the knob 1 7, the knob 1 7 drives the moving rod 6 to rotate. When the moving rod 6 rotates, it drives the piston 1 5 to move upward to open the air inlet 4, so that the gas enters the interior of the gas tank 3.

[0065] When replacing the gas cylinder 3, first pull the handle 17 to pull the support plate 2 out of the sampling box 1. When replacing and installing the gas cylinder 3, insert the gas cylinder 3 into the middle of the support plate 2. At this time, the outer side of the gas cylinder 3 squeezes the limit block 16 to move the limit block 16 toward the inner side of the fixed groove 14. When the gas cylinder 3 moves downward to the limit groove 13 and is opposite to the fixed groove 14, the limit block 16 extends into the inside of the limit groove 13 under the elastic action of the compression spring 15 to fix the gas cylinder 3.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A VOCs detection instrument sampling device, characterized in that , including: Sampling box (1); A support plate (2) arranged inside the sampling box (1); A sampling mechanism, which is arranged in the middle of the support plate (2); The sampling mechanism comprises a gas tank (3) arranged in the middle of the support plate (2), the top of the gas tank (3) is provided with an air inlet (4), the interior of the air inlet (4) is fitted with a piston (5) to control the inlet and outlet of gas through the piston (5), a moving rod (6) is fixedly arranged above the piston (5), and the moving rod (6) extends to the top of the gas tank (3), and a rotating knob (7) is fixedly arranged above the moving rod (6); The air extraction mechanism is arranged inside the gas tank (3).

2. A VOCs detection instrument sampling device according to claim 1, characterized in that: Also included are: A handle (17) disposed above the support plate (2); A limiting groove (13) is provided on the outer side of the gas tank (3); A fixing mechanism, which is arranged inside the support plate (2); The fixing mechanism comprises a fixing groove (14) opened inside the support plate (2), a compression spring (15) is fixedly arranged inside the fixing groove (14), the inner side of the compression spring (15) is elastically connected to a limiting block (16), and the limiting block (16) extends to the inside of the limiting groove (13).

3. A VOCs detection instrument sampling device according to claim 1, characterized in that: The air extraction mechanism comprises a second piston (10) movably arranged inside the gas tank (3), a transmission rod (11) being fixedly arranged below the second piston (10), and the transmission rod (11) passing through and engaging with the bottom of the gas tank (3) and extending below it, and a second rotating knob (12) being fixedly arranged below the transmission rod (11).

4. A VOCs detection instrument sampling device according to claim 1, characterized in that: Also included are: A fixed plate (8) disposed on the outer side of the moving rod (6) and engaged with the moving rod (6); A support column (9) is arranged between the fixing plate (8) and the gas tank (3).

5. A VOCs detection instrument sampling device according to claim 2, characterized in that: The inner side of the limiting block (16) is arc-shaped and fits tightly with the gas tank (3) inside the limiting groove (13) when it plays a fixing role.

6. A VOCs detection instrument sampling device according to claim 1, characterized in that: The outer side of the piston 1 (5) is provided with a rubber sleeve which fits the air inlet (4), and the outer side of the piston 2 (10) is also provided with a rubber sleeve which fits the air tank (3).

7. A VOCs detection instrument sampling device according to claim 1, characterized in that: The outer side of the rotating knob (7) is fixedly provided with an anti-sliding block, which is arranged in a circular array on the outer side of the rotating knob (7), and the outer side of the rotating knob (12) is also provided with an anti-sliding block.

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