Portable atmospheric pollutant detection device

Abstract

The utility model discloses a portable atmospheric pollutant detection device which comprises a shell and a display screen, a gas collection chamber is arranged in the shell, a detection assembly is arranged in the gas collection chamber, the detection assembly is electrically connected with the display screen, an exhaust assembly is arranged in the shell, and the exhaust assembly comprises a reciprocating lead screw. One end of the reciprocating lead screw is rotationally connected with the top of the gas collection chamber through a bearing, the other end of the reciprocating lead screw is connected with the motor, the reciprocating lead screw is movably sleeved with a reciprocating sleeve, the bottom of the reciprocating sleeve is fixedly connected with a first push rod, and the other end of the first push rod penetrates through the top of the gas collection chamber, extends into the gas collection chamber and is fixedly connected with a partition block; a one-way exhaust hole is formed in the bottom of the gas collection chamber, and a first gas inlet and a second gas inlet are formed in the upper end and the lower end of the side face of the gas collection chamber respectively. According to the gas sampling device, redundant gas in the gas collection chamber is exhausted through the exhaust assembly, so that gas interference is avoided, and the sampling accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air pollutant detection, and in particular relates to a portable air pollutant detection device. Background Art

[0002] The sampling methods of the atmospheric pollutant detection device are divided into diffusion type and pump suction type. It is an instrument specially used to detect the air quality. It can quickly detect the air quality in the environment in any scene and any place, and thus promptly alarm when the pollutants exceed the standard.

[0003] The portable air pollutant detection instrument is small and easy to carry and operate. It can detect the gas concentration by sensing the gas through the internal gas sensor, and alarm when the gas concentration reaches the limit value, and display the specific gas concentration value on the display screen for observation by personnel in the surrounding area of ​​the instrument. The existing portable air pollutant detection device directly samples and detects the ambient air, and does not discharge the gas of the last detected sample, which may cause the two gases to mix, and the internal exhaust gas content changes, affecting the final detection result of the sampled gas. Utility Model Content

[0004] Based on the above background, the purpose of the utility model is to provide a portable atmospheric pollutant detection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A portable atmospheric pollutant detection device comprises a shell, a display screen is arranged on the shell, a gas collecting chamber is arranged in the shell, a detection component is arranged in the gas collecting chamber, and the detection component is electrically connected to the display screen;

[0007] An exhaust assembly is provided in the shell, and the exhaust assembly includes a reciprocating screw, one end of the reciprocating screw is rotatably connected to the top of the air collecting chamber through a bearing, the other end of the reciprocating screw is connected to a motor, and the motor is fixed to the top of the shell, a reciprocating sleeve is movably sleeved on the reciprocating screw, a first push rod is fixedly connected to the bottom of the reciprocating sleeve, the other end of the first push rod passes through the top of the air collecting chamber, extends into the air collecting chamber and is fixedly connected to a partition block, and the outer side surface of the partition block is in contact with the inner side surface of the air collecting chamber;

[0008] A one-way exhaust hole is provided at the bottom of the gas collecting chamber, and the exhaust hole is a single-exhalation valve;

[0009] A first air inlet and a second air inlet are respectively provided at the upper and lower ends of the side of the air collecting chamber. The first air inlet and the second air inlet are connected to a sampling tube through a pipeline. The other end of the sampling tube extends out of the shell. A first one-way valve is provided between the first air inlet and the sampling tube, and a second one-way valve is provided between the first air inlet and the second air inlet.

[0010] Preferably, a filter assembly is provided in the sampling tube;

[0011] The filter assembly comprises a filter sleeve, the outer wall of which is provided with threads and is threadedly connected to the sampling tube through the threads;

[0012] A filter chamber is arranged in the filter sleeve, and a plurality of filter holes are opened on the filter chamber.

[0013] Preferably, the outside of the filter bin is coated with filter cotton, and the particulate impurities in the air are effectively filtered out through double-layer filtration of the filter holes and the filter cotton, thereby improving the accuracy of the gas to be detected.

[0014] Preferably, the first push rods are provided in four numbers and are evenly distributed in a circular array along the bottom of the reciprocating sleeve.

[0015] Preferably, silicone sleeves are fixedly connected to the upper and lower sides of the outer side surface of the partition block to improve the sealing performance between the partition block and the gas collecting chamber.

[0016] Preferably, a sealing sleeve is fixedly provided on the outer side of the shell near one end of the sampling tube, which cooperates with the sampling tube. The sealing sleeve is made of silicone material. After the device is used, the sealing sleeve is covered on the sampling tube to prevent dust from entering.

[0017] Preferably, a handle is provided on the top of the shell to facilitate the user to carry the device.

[0018] The utility model has the following beneficial effects:

[0019] 1. By setting up an exhaust component, the excess gas in the gas collecting chamber is discharged before the sampled gas is tested to avoid gas interference and improve the accuracy of sampling.

[0020] 2. By providing a first air inlet, a second air inlet, a first one-way valve and a second one-way valve, and bidirectional movement of the reciprocating screw and the reciprocating sleeve, gas sampling is performed while exhausting, thereby reducing the complexity of sampling and improving sampling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the external three-dimensional structure of the utility model;

[0024] Figure 3 For the utility model Figure 1 A schematic diagram of the enlarged structure at point A;

[0025] Figure 4 For the utility model Figure 1 A schematic diagram of the enlarged structure at B;

[0026] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the sampling tube of the utility model.

[0027] Wherein: 1. Shell;

[0028] 2. Display screen;

[0029] 3. Gas collecting chamber;

[0030] 4. Exhaust assembly; 41. Reciprocating screw; 42. Reciprocating sleeve; 43. First push rod; 44. Partition block; 45. Exhaust hole; 46. First air inlet; 47. Second air inlet; 48. Silicone sleeve; 49. Motor;

[0031] 5. The first one-way valve;

[0032] 6. Second one-way valve;

[0033] 7. Sampling tube; 71. Sealing sleeve;

[0034] 8. Filter assembly; 81. Filter sleeve; 82. Filter chamber; 83. Filter hole; 84. Filter cotton;

[0035] 9.Handle. DETAILED DESCRIPTION

[0036] 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 of 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.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] like Figure 1-5 As shown, a portable air pollutant detection device comprises a housing 1, a display screen 2 is provided on the housing 1, a gas collecting chamber 3 is provided in the housing 1, a detection component is provided in the gas collecting chamber 3, and the detection component is electrically connected to the display screen 2;

[0040] An exhaust assembly 4 is provided in the shell 1, and the exhaust assembly 4 includes a reciprocating screw 41, one end of the reciprocating screw 41 is rotatably connected to the top of the air collecting chamber 3 through a bearing, and the other end of the reciprocating screw 41 is connected to a motor 49, and the motor 49 is fixed to the top of the shell 1. A reciprocating sleeve 42 is movably sleeved on the reciprocating screw 41, and a first push rod 43 is fixedly connected to the bottom of the reciprocating sleeve 42. The other end of the first push rod 43 passes through the top of the air collecting chamber 3, extends into the air collecting chamber 3, and is fixedly connected to a partition block 44, and the outer side surface of the partition block 44 is in contact with the inner side surface of the air collecting chamber 3;

[0041] A one-way exhaust hole 45 is provided at the bottom of the gas collecting chamber 3, and the exhaust hole is a one-way exhalation valve;

[0042] The upper and lower ends of the side of the air collecting chamber 3 are respectively provided with a first air inlet 46 and a second air inlet 47, the first air inlet 46 and the second air inlet 47 are connected to the sampling tube 7 through a pipeline, and the other end of the sampling tube 7 extends out of the shell 1, and a first one-way valve 5 is provided between the first air inlet 46 and the sampling tube 7, and a second one-way valve 6 is provided between the first air inlet 46 and the second air inlet 47.

[0043] Preferably, a filter assembly 8 is provided in the sampling tube 7;

[0044] The filter assembly 8 includes a filter sleeve 81, the outer wall of which is provided with threads and is threadedly connected to the sampling tube 7 through the threads;

[0045] A filter chamber 82 is disposed in the filter sleeve 81 , and a plurality of filter holes 83 are formed in the filter chamber 82 .

[0046] Preferably, the outer side of the filter chamber 82 is coated with filter cotton 84, and the particulate impurities in the air are effectively filtered out through double-layer filtration of the filter holes 83 and the filter cotton 84, thereby improving the accuracy of the gas to be detected.

[0047] Preferably, the first push rods 43 are provided in four numbers and are evenly distributed in a circular array along the bottom of the reciprocating sleeve 42 .

[0048] Preferably, silicone sleeves 48 are fixedly connected to the upper and lower sides of the outer side surface of the partition block 44 to improve the sealing performance between the partition block 44 and the gas collecting chamber 3.

[0049] Preferably, a sealing sleeve 71 is fixedly provided on one end of the outer side of the shell 1 close to the sampling tube 7, which cooperates with the sampling tube 7. The sealing sleeve 71 is made of silicone. After the device is used, the sealing sleeve 71 is covered on the sampling tube to prevent dust from entering.

[0050] Preferably, a handle 9 is provided on the top of the housing 1 to facilitate the user to carry the device.

[0051] The working principle of the utility model is to place the detection device where atmospheric sampling is required, open the sealing sleeve 71 from the sampling tube 7, the sampling tube 7 is in contact with the atmosphere, start the motor 49, the rotation of the motor 49 drives the reciprocating screw 41 to rotate, the reciprocating sleeve 42 moves downward, and drives the partition block 44 on the first push rod 43 to move downward from the top of the gas collecting chamber 3, the partition block 44 conflicts with the inner wall of the gas collecting chamber 3 and is sealed with a silicone sleeve 48, the gas in the gas collecting chamber 3 is pushed by the partition block 44, and is discharged from the gas collecting chamber 3 from the exhaust hole 45, while the partition block 44 moves downward, the partition block 44 and the enclosed space at the top of the gas collecting chamber 3 generate negative pressure, the gas passes through the filter assembly 8 and the sampling tube 7, and enters the gas collecting chamber 3 above the partition block 44 from the first one-way valve 5, wherein the filter assembly 8 filters the particles in the atmosphere, and the partition block 44 moves to the bottom of the gas collecting chamber 3, and after all the previous gas is discharged through the exhaust hole 45, the collected gas fills the gas collecting chamber 3, and the reciprocating sleeve 42 reaches the bottom of the reciprocating screw 41. Because the reciprocating screw 41 is connected to the top of the gas collecting chamber 3, and the thread of the reciprocating screw 41 is bidirectional, the reciprocating sleeve 42 begins to reset and move upward, driving the first push rod 43 and the partition block 44 to move upward. At this time, the partition block 44 squeezes the gas in the upper part of the gas collecting chamber 3, and the gas enters the lower part of the gas collecting chamber 3 from the second one-way valve 6 and the second air inlet 47 under negative pressure. When the reciprocating sleeve 42 completes the reset and reaches the top of the reciprocating screw 41, the partition block 44 moves up to the top of the gas collecting chamber 3, and the collected gas fills the gas collecting chamber again, and then the detection result is transmitted to the display screen 2 via the detection component in the gas collecting chamber 3 to complete the gas detection.

[0052] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A portable air pollutant detection device, characterized in that: It comprises a shell, a display screen is arranged on the shell, a gas collecting chamber is arranged in the shell, a detection component is arranged in the gas collecting chamber, and the detection component is electrically connected to the display screen; An exhaust assembly is provided in the shell, and the exhaust assembly includes a reciprocating screw, one end of the reciprocating screw is rotatably connected to the top of the air collecting chamber through a bearing, and the other end is connected to a motor, and the motor is fixed to the top of the shell. A reciprocating sleeve is movably sleeved on the reciprocating screw, and a first push rod is fixedly connected to the bottom of the reciprocating sleeve. The other end of the first push rod extends into the air collecting chamber and is fixedly connected to a partition block, and the outer side surface of the partition block contacts the inner side surface of the air collecting chamber; A one-way exhaust hole is provided at the bottom of the gas collecting chamber; A first air inlet and a second air inlet are respectively provided at the upper and lower ends of the side of the air collecting chamber. The first air inlet and the second air inlet are connected to a sampling tube through a pipeline. The other end of the sampling tube extends out of the shell. A first one-way valve is provided between the first air inlet and the sampling tube, and a second one-way valve is provided between the first air inlet and the second air inlet.

2. The portable air pollutant detection device according to claim 1, characterized in that: A filter assembly is provided in the sampling tube; The filter assembly comprises a filter sleeve, the outer wall of which is provided with threads and is threadedly connected to the sampling tube through the threads; A filter chamber is arranged in the filter sleeve, and a plurality of filter holes are opened on the filter chamber.

3. The portable air pollutant detection device according to claim 2, characterized in that: The outer side of the filter bin is coated with filter cotton.

4. The portable air pollutant detection device according to claim 1, characterized in that: The first push rods are arranged in four and are evenly distributed in a circular array along the bottom of the reciprocating sleeve.

5. The portable air pollutant detection device according to claim 1, characterized in that: The upper and lower sides of the outer side surface of the partition block are fixedly connected with a silicone sleeve.

6. The portable air pollutant detection device according to claim 3, characterized in that: A sealing sleeve is fixedly provided on one end of the outer side of the shell body close to the sampling tube and matched with the sampling tube.

7. The portable air pollutant detection device according to any one of claims 1 to 6, characterized in that: A handle is provided on the top of the shell.

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