A waste gas collection device for environmental detection

Abstract

The present application relates to an exhaust gas collection device for environmental detection, which belongs to the technical field of environmental detection equipment, and comprises a collecting bottle for storing gas samples; a collecting box for storing the collecting bottle and providing a closed space, and a ventilation door is provided on the side wall of the collecting box; a gas collecting pipe for introducing the gas sample into the collecting bottle, the gas collecting pipe is slidably arranged in the collecting box and slides in a direction close to or away from the collecting bottle; a driving assembly comprises a motor fixed to the inner wall of the collecting box and a cage gear fixedly connected to the end of the output shaft of the motor; a first rack for pushing open the ventilation door, the first rack meshing with the cage gear; and a steering assembly for cooperating with the cage gear to drive the gas collecting pipe to slide close to the collecting bottle. The present application has the effect of preventing the gas sample collected in the gas collecting bottle from being contaminated, thereby ensuring the accuracy of gas detection.

Description

Technical Field

[0001] The present application relates to the technical field of environmental detection equipment, and in particular to an exhaust gas collection device for environmental detection. Background Art

[0002] Atmospheric sampling in environmental testing is the process of collecting gas samples or polluted air samples in the atmosphere. At present, there are two types of on-site sampling methods: one is to allow a large amount of air to pass through a liquid absorbent or solid adsorbent to enrich pollutants with lower concentrations in the atmosphere, such as the vacuum method and the filter membrane method. The gas sample is allowed to enter the absorption liquid at a certain flow rate, and its content concentration is calculated based on the fixed gas factor in the absorption liquid; the other is to use a container to collect gas samples at the corresponding sampling site. This method is mainly aimed at gas factors that cannot be fixed with absorbents, such as the concentration of odor, exhaust gas, non-methane total hydrocarbons in the atmosphere. When the concentration content, the gas sample needs to be filled into the sampling equipment and tested in the laboratory in the form of gas phase.

[0003] The collection head is placed at the position where gas needs to be collected, and the collected gas is transported to the gas collecting bottle to form a gas sample.

[0004] When the collected gas samples are collected through a gas collecting bottle, the gas at the mouth of the gas collecting bottle will take the opportunity to float into the gas collecting bottle, which has the defect of affecting the detection accuracy. Summary of the invention

[0005] In order to prevent the gas samples collected in the gas collecting bottle from being contaminated and ensure the accuracy of gas detection, the present application provides a waste gas collection device for environmental detection.

[0006] The waste gas collection device for environmental detection provided in this application adopts the following technical solution:

[0007] An exhaust gas collection device for environmental detection, comprising:

[0008] Collection bottles for storing gas samples;

[0009] A collection box, which is used to store the collection bottles and provide a closed space, and a ventilation door is provided on the side wall of the collection box;

[0010] A gas collecting pipe, used for introducing gas samples into the collection bottle, wherein the gas collecting pipe is slidably arranged in the collection box and slides in a direction close to or away from the collection bottle;

[0011] A driving assembly, comprising a motor fixed to the inner wall of the collection box and a cage gear fixedly connected to the end of the output shaft of the motor;

[0012] A first rack, used for pushing open the ventilation door, wherein the first rack is meshed with the cage gear;

[0013] The steering assembly is used to cooperate with the cage gear to drive the gas collecting pipe to slide close to the collecting bottle.

[0014] By adopting the above technical solution, the collected gas is first sent to the collection box through the gas collecting pipe, the motor is started, and the cage gear is driven to rotate, thereby driving the first rack and the steering assembly to operate at the same time, and the first rack pushes open the air door. At this time, the end of the gas collecting pipe has not yet reached the inside of the collection bottle. The collected gas pushes the original gas in the collection box outward, so that the collected gas fills the entire collection box. Then the end of the gas collecting pipe reaches the inside of the collection bottle and pushes out the gas inside the collection bottle, so that the collection bottle is filled with the collected gas to finally form a gas sample, and the space around the collection bottle is also filled with the collected target gas, which reduces the obstruction of the environment around the collection bottle to the collection bottle when filling the sample gas, protects the gas in the collection bottle to the greatest extent, and prevents the gas sample collected in the gas collecting bottle from being contaminated, thereby ensuring the accuracy of gas detection.

[0015] Optionally, the steering assembly includes a second rack meshing with the cage gear, a driven gear meshing with the second rack, a screw that rotates synchronously with the driven gear, and a guide block fixed to the outer wall of the gas collecting pipe and penetrated by the screw, there is a distance between the guide block and the end of the gas collecting pipe close to the collecting bottle, the guide block is threadedly connected to the screw, the driven gear ring is fixed on the screw, the screw rotates relative to the collection box, and the length direction of the screw is set along the sliding direction of the gas collecting pipe.

[0016] By adopting the above technical solution, the rotation of the cage gear drives the movement of the second rack, the movement of the second rack drives the driven gear to rotate, the driven gear drives the screw to rotate, and the screw drives the guide block to move, thereby achieving the effect of moving the gas collecting pipe toward the collecting bottle. Since there is a distance between the guide block and the end of the gas collecting pipe close to the collecting bottle, the end of the gas collecting pipe will eventually be inserted into the collecting bottle, which is convenient for fully pushing out the original gas inside the collecting bottle, thereby filling it with the collected gas.

[0017] Optionally, the cage gear is an incomplete gear, and the first rack and the second rack are respectively meshed with the cage gear in a staggered manner in time; the first rack is provided with a first elastic member for resetting the first rack, and the screw is provided with a second elastic member for resetting the second rack.

[0018] By adopting the above technical solution, the cage gear is an incomplete gear, thereby forming an intermittent drive effect. When the first rack is engaged with the cage gear, the second rack cannot be engaged with the cage gear. At this time, the second elastic member drives the second rack to reset. Similarly, when the first rack cannot be engaged with the cage gear, the first elastic member drives the first rack to reset. In this way, when the collected gas is filled into the collection bottle, the air door is in a closed state, and a closed space is formed in the collection box to reduce the pollution of the gas inside the collection bottle. Or when the air door is in an open state, the gas collecting pipe has not moved close to the collection bottle. At this time, the main purpose is to push out the original gas in the collection box and replace it with the collected gas, so as to provide a guaranteed filling environment for the subsequent filling of the collected gas into the collection bottle.

[0019] Optionally, a sealing cap is hinged at the bottle mouth of the collecting bottle, and a first torsion spring is fixed between the inner wall of the collecting bottle and the sealing cap to enable the sealing cap to maintain a sealing posture against the bottle mouth.

[0020] By adopting the above technical solution, the end of the gas collecting pipe pushes the cover downward, and the end of the gas collecting pipe extends into the interior of the collecting bottle, thereby filling the collected gas into the collecting bottle. After the filling is completed, the first torsion spring drives the cover to reset, thereby sealing the internal space of the collecting bottle.

[0021] Optionally, the ventilation door is a one-way door, and the ventilation door can only swing toward the outside of the collection box to be in an open position, and a second torsion spring is provided between the ventilation door and the collection box to force the ventilation door to be in a closed state.

[0022] By adopting the above technical solution, the ventilation door is set as a one-way door, and cooperates with the second torsion spring to keep the ventilation door closed, thereby protecting the internal space of the collection box and preventing the external gas from easily entering the collection box.

[0023] Optionally, a partition plate is fixed in the collecting bottle, and the partition plate is arranged along the length direction of the collecting bottle. There is a distance between the bottom of the partition plate and the bottom of the collecting bottle, and there is a distance between the top of the partition plate and the sealing cover for the sealing cover to swing into the collecting bottle. A notch is opened on the top of the partition plate for forming an air circuit when the air collecting pipe inflates the collecting bottle.

[0024] By adopting the above technical solution, the partition plate is set up in combination with its own notch, so that the end of the gas collecting pipe can penetrate into the interior of the collecting bottle. When the collected gas is filled into the collecting bottle, an air flow passage is formed inside the collecting bottle, which makes it convenient for the collected gas to push out the original gas in the collecting bottle. The notch, the partition plate, and the gap between the bottom of the partition plate and the bottom of the collecting bottle form a flow path for the air circuit.

[0025] Optionally, a base is rotatably provided at the bottom of the collection box, and a slot for inserting and placing a collection bottle is opened on the base. The base rotates relative to the collection box and the collection bottle follows the base to rotate into or out of the collection box.

[0026] By adopting the above technical solution, when it is necessary to collect gas at multiple collection points, multiple collection bottles are inserted into the base. After the collection at one point is completed, the base or the collection box is rotated to rotate the next collection bottle into the collection box, thereby facilitating the gas collection at the next point.

[0027] Optionally, a latch is slidably provided on the outer wall of the collection box, and a socket is provided on the base, and the latch is inserted into the socket.

[0028] By adopting the above technical solution, whether the collection box and the base rotate relative to each other is controlled by whether the pin is inserted into the socket, thereby ensuring that the gas collecting pipe can stably fill the collected gas into the collection bottle.

[0029] Optionally, it also includes a collection head, a telescopic tube, a connecting hose, an air pump and a winding reel, wherein one end of the telescopic tube is connected to the collection head, and the other end is connected to the connecting hose, the connecting hose is wrapped around the winding reel, and the winding reel is fixed on the top of the collection box, and the end of the connecting hose away from the telescopic tube is connected to the air pump, and the air pump is used to supply air to the gas collecting pipe.

[0030] By adopting the above technical solution, the collection head is placed at the collection point for gas collection by extending the telescopic tube to a suitable distance. Due to the presence of the air pump, the collected gas passes through the telescopic tube, the connecting hose and the air pump into the gas collecting pipe, and the reel collects the excess connecting hose, making the entire device clean and tidy.

[0031] Optionally, a sealing ring is fixed on the sealing cover, and the sealing ring is used to fill the gap between the sealing cover and the bottle mouth of the collecting bottle.

[0032] By adopting the above technical solution, the provision of the sealing ring enhances the sealing effect of the sealing cap on the collecting bottle.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] The setting of the collection box provides a guaranteed aerated environment for the collection bottle, reducing the pollution of the gas in the collection bottle by the external air;

[0035] The driving assembly can drive both the first rack and the steering assembly, thus maximizing the utilization of the motor's kinetic energy;

[0036] The setting of the base can fully correspond to the actual environment and can ensure the stable use of multiple collection bottles when gas is collected at multiple points. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a front structural schematic diagram of an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the back structure of an embodiment of the present application;

[0039] Figure 3 It is a partial structural cross-sectional view;

[0040] Figure 4 It is a partial structural cross-sectional view showing the internal structure of the collecting bottle;

[0041] Figure 5 This is a partial structural cross-sectional view showing the location of the steering assembly.

[0042] In the figure, 1. collection box; 11. ventilation door; 12. second torsion spring; 13. latch; 14. positioning tube; 15. air pump; 16. take-up reel; 17. connecting hose; 18. telescopic tube; 19. collection head; 2. collection bottle; 21. sealing cap; 22. first torsion spring; 23. sealing ring; 3. air collecting pipe; 4. driving assembly; 41. motor; 42. cage gear; 5. first rack; 51. first elastic member; 52. first guide rail; 6. steering assembly; 61. second rack; 611. second elastic member; 612. second guide rail; 62. driven gear; 63. screw; 64. guide block; 7. partition plate; 71. notch; 8. base; 81. slot; 82. jack. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-Figure 5 This application is described in further detail.

[0044] The embodiment of the present application discloses an exhaust gas collection device for environmental detection.

[0045] refer to Figures 1 to 3 A waste gas collection device for environmental detection includes a collection box 1, a collection head 19, a telescopic tube 18, a connecting hose 17, an air pump 15, a reel 16 and a collection bottle 2. One end of the telescopic tube 18 is connected to the collection head 19, and the other end is connected to the connecting hose 17. The connecting hose 17 is wound on the reel 16, and the reel 16 is fixed on the top of the collection box 1. The end of the connecting hose 17 away from the telescopic tube 18 is connected to the air pump 15, and the air pump 15 is fixed on the top of the collection box 1. A positioning tube 14 and a gas collecting pipe 3 are arranged in the collection box 1. The positioning tube 14 is vertically fixed on the top of the collection box 1. The air pump 15 is connected to the positioning tube 14. The gas collecting pipe 3 is slidably arranged in the collection box 1, and the specific gas collecting pipe 3 is slidably arranged on the positioning tube 14. The gas collecting pipe 3 inflates the collection bottle 2, and the collection bottle 2 stores the collected gas samples.

[0046] refer to Figures 1 to 3, a base 8 is rotatably arranged below the collection box 1, and the top surface of the base 8 is the bottom surface of the collection box 1. The base 8 rotates relative to the collection box 1, and the top area of ​​the base 8 is larger than the area covered by the bottom of the collection box 1, that is, there is an area on the base 8 that the collection box 1 cannot cover. A slot 81 is provided on the base 8, and a plurality of slots 81 are provided, and adjacent slots 81 are provided at intervals, and all slots 81 are arranged in a circular array as a whole, and the center of the circle coincides with the central axis of the collection box 1. Specifically, the collection box 1 can be cylindrical, and the base 8 can be rectangular, or the shapes of the two are interchangeable. The collection bottle 2 is inserted into the corresponding slot 81. When the base 8 rotates relative to the collection box 1, part of the collection bottle 2 is transferred into the collection box 1, and part of the collection bottle 2 is transferred out of the collection box. A latch 13 slides on the outer wall of the collection box 1, and a socket 82 is provided on the base 8. The latch 13 slides in a direction away from or close to the socket 82. The latch 13 is inserted into the socket 82, which is the locking state of the collection box 1 and the base 8.

[0047] refer to Figure 1 and Figure 2 A ventilation door 11 is hinged on the vertical side wall of the collection box 1. The ventilation door 11 is a one-way door. The ventilation door 11 can only be opened toward the outside of the collection box 1. A second torsion spring 12 is fixed between the ventilation door 11 and the collection box 1. When the ventilation door 11 is not subjected to a thrust toward the outside of the collection box 1, the second torsion spring 12 makes the ventilation door 11 close to the collection box 1 and be in a closed state.

[0048] refer to Figures 3 to 5 A driving assembly 4 is provided in the collection box 1, and the driving assembly 4 includes a motor 41 and a cage gear 42. The motor 41 is fixed inside the collection box 1, and the cage gear 42 is fixed on the end of the output shaft of the motor 41. The cage gear 42 is an incomplete gear.

[0049] refer to Figures 3 to 5 , a steering assembly 6 and a first rack 5 are provided in the collection box 1. The first rack 5 is slidably provided in the collection box 1 along a direction approaching or moving away from the air-permeable door 11, and the first rack 5 is intermittently meshed with the cage gear 42. A first guide rail 52 is fixed in the collection box 1, and the first guide rail 52 is used to limit the sliding direction of the first rack 5, and at the same time ensure that the first rack 5 and the cage gear 42 can be intermittently meshed, that is, the first rack 5 is slidably provided on the first guide rail 52. The steering assembly 6 includes a second rack 61, a driven gear 62, a screw 63 and a guide block 64. The second rack 61 is intermittently meshed with the cage gear 42. A second guide rail 612 is fixed in the collection box 1, and the second guide rail 612 is used to limit the sliding direction of the second rack 61, and at the same time ensure that the second rack 61 and the cage gear 42 can be intermittently meshed, that is, the second rack 61 is slidably provided on the first guide rail 52.

[0050] refer to Figures 3 to 5, the driven gear 62 is meshed with the second rack 61, the driven gear 62 is fixed on the screw 63 in a ring, the screw 63 is vertically arranged, the screw 63 is rotatably arranged in the collection box 1, that is, the screw 63 rotates relative to the collection box 1, and the length setting direction of the screw 63 is the same as the sliding direction of the gas collecting pipe 3, that is, the same direction away from or close to the collection bottle 2, which is the vertical direction in this embodiment. The screw 63 rotates synchronously with the driven gear 62, the guide block 64 is penetrated by the screw 63 and is threadedly connected with the screw 63, the guide block 64 is fixed on the outer wall of the gas collecting pipe 3, and there is a distance between the fixed position and the end of the gas collecting pipe 3 close to the collection bottle 2, that is, the screw 63 drives the gas collecting pipe 3 to move close to the collection bottle 2 through the guide block 64, and when the guide block 64 abuts against the top surface of the base 8, the gas collecting pipe 3 moves to the state of deep into the collection bottle 2.

[0051] refer to Figures 3 to 5 , the first rack 5 and the second rack 61 are respectively meshed with the cage gear 42 in a staggered manner in time, that is, when the first rack 5 is meshed with the cage gear 42, the second rack 61 cannot be meshed with the cage gear 42, and vice versa. The first rack 5 is provided with a first elastic member 51 for resetting the first rack 5. The first elastic member 51 can be a spring. One end of the spring is fixed to the end of the first rack 5 away from the air-permeable door 11, and the other end is fixed to the inner wall of the collection box 1. The length direction of the spring is the same as the moving direction of the first rack 5, both of which are the direction of approaching or moving away from the air-permeable door 11. The screw 63 is provided with a second elastic member 611 for resetting the second rack 61. The second elastic member 611 can be a coil spring, which is fixed between the screw 63 and the inner wall of the collection box 1.

[0052] refer to Figures 3 to 5 A cover 21 is hinged at the mouth of the collecting bottle 2, and a first torsion spring 22 is fixed between the inner wall of the collecting bottle 2 and the cover 21. The first torsion spring 22 is used for the cover 21 to restore the sealing posture of the bottle mouth. A sealing ring 23 is fixed on the cover 21, and the sealing ring 23 blocks the gap between the cover 21 and the mouth of the collecting bottle 2. In this embodiment, only one collecting bottle 2 is drawn for illustration.

[0053] refer to Figures 3 to 5 A partition plate 7 is fixed in the collecting bottle 2. The partition plate 7 is arranged along the length direction of the collecting bottle 2. There is a distance between the bottom of the partition plate 7 and the bottom of the collecting bottle 2, and there is a distance between the top of the partition plate 7 and the sealing cover 21. The setting of the partition plate 7 does not affect the swinging of the sealing cover 21 into the collecting bottle 2. A notch 71 is opened on the top of the partition plate 7. When the cover plate abuts against the top of the partition plate 7, the notch 71 facilitates the formation of an air circuit when the gas collecting pipe 3 inflates the inside of the collecting bottle 2.

[0054] The implementation principle of the waste gas collection device for environmental testing in the embodiment of the present application is as follows: the collection head 19 is placed at the collection point to collect gas by extending the telescopic tube 18 to a suitable distance. The collected gas is passed into the gas collecting pipe 3 through the telescopic tube 18, the connecting hose 17 and the air pump 15 due to the existence of the air pump 15. The collected gas is first sent to the collection box 1 through the gas collecting pipe 3. The motor 41 is started to drive the cage gear 42 to rotate, thereby driving the first rack 5 and the steering assembly 6 to operate at the same time. The first rack 5 pushes the air door 11 open. At this time, the end of the gas collecting pipe 3 has not yet reached the collection box 1. Inside the collecting bottle 2, the collected gas pushes the original gas in the collecting box 1 outward, so that the collected gas fills the entire collecting box 1, and then the end of the gas collecting pipe 3 reaches the inside of the collecting bottle 2, and pushes out the gas inside the collecting bottle 2, so that the collecting bottle 2 is filled with the collected gas to finally form a gas sample, and the space around the collecting bottle 2 is also filled with the collected target gas, reducing the obstruction of the surrounding environment of the collecting bottle 2 to the collection bottle 2 when filling the sample gas, and protecting the gas in the collecting bottle 2 to the greatest extent, so that the gas sample collected in the gas collecting bottle is not contaminated, thereby ensuring the accuracy of gas detection.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas collection device for environmental detection, characterized in that: include: A collecting bottle (2) for storing a gas sample; A collection box (1) is used to store the collection bottle (2) and provide a closed space, and a ventilation door (11) is provided on the side wall of the collection box (1); A gas collecting pipe (3) is used to introduce a gas sample into the collecting bottle (2); the gas collecting pipe (3) is slidably arranged in the collecting box (1) and slides in a direction approaching or moving away from the collecting bottle (2); A driving assembly (4) comprising a motor (41) fixed to the inner wall of the collection box (1) and a cage gear (42) fixedly connected to the end of the output shaft of the motor (41); A first rack (5) is used to push open the air-permeable door (11), wherein the first rack (5) is meshed with a cage gear (42); a steering assembly (6) is used to cooperate with the cage gear (42) to drive the air collecting pipe (3) to slide toward the collecting bottle (2); The steering assembly (6) comprises a second rack (61) meshed with the cage gear (42), a driven gear (62) meshed with the second rack (61), a screw (63) rotating synchronously with the driven gear (62), and a guide block (64) fixed on the outer wall of the air collecting pipe (3) and penetrated by the screw (63), wherein there is a distance between the guide block (64) and the end of the air collecting pipe (3) close to the collecting bottle (2), the guide block (64) is threadedly connected to the screw (63), and the driven gear (62) is fixed by a ring sleeve. On the screw rod (63), the screw rod (63) rotates relative to the collection box (1), and the length direction of the screw rod (63) is arranged along the sliding direction of the gas collecting pipe (3); the cage gear (42) is an incomplete gear, and the first rack (5) and the second rack (61) are respectively meshed with the cage gear (42) in a staggered manner in time; the first rack (5) is provided with a first elastic member (51) for resetting the first rack (5), and the screw rod (63) is provided with a second elastic member (611) for resetting the second rack (61).

2. The exhaust gas collection device for environmental detection according to claim 1, characterized in that: A sealing cover (21) is hingedly connected at the bottle mouth of the collecting bottle (2), and a first torsion spring (22) is fixed between the inner wall of the collecting bottle (2) and the sealing cover (21) to keep the sealing cover (21) in a sealed posture with respect to the bottle mouth.

3. The exhaust gas collection device for environmental detection according to claim 1, characterized in that: The air permeable door (11) is a one-way door. The air permeable door (11) can only swing toward the outside of the collection box (1) to be in an open position. A second torsion spring (12) is provided between the air permeable door (11) and the collection box (1) for urging the air permeable door (11) to be in a closed position.

4. The exhaust gas collection device for environmental detection according to claim 2, characterized in that: A partition plate (7) is fixed inside the collecting bottle (2), and the partition plate (7) is arranged along the length direction of the collecting bottle (2). There is a distance between the bottom of the partition plate (7) and the bottom of the collecting bottle (2), and there is a distance between the top of the partition plate (7) and the sealing cover (21) for swinging the sealing cover (21) into the inside of the collecting bottle (2). A notch (71) is provided on the top of the partition plate (7) for forming an air circuit when the air collecting pipe (3) is inflated into the inside of the collecting bottle (2).

5. The exhaust gas collection device for environmental detection according to claim 1, characterized in that: The bottom of the collection box (1) is rotatably provided with a base (8), and the base (8) is provided with a slot (81) for inserting and placing the collection bottle (2); the base (8) rotates relative to the collection box (1), and the collection bottle (2) follows the base (8) to rotate into or out of the collection box (1).

6. The exhaust gas collection device for environmental detection according to claim 5, characterized in that: A latch (13) is slidably provided on the outer wall of the collection box (1), and a socket (82) is provided on the base (8), and the latch (13) is inserted into the socket (82).

7. The exhaust gas collection device for environmental detection according to claim 1, characterized in that: The utility model also comprises a collection head (19), a telescopic tube (18), a connecting hose (17), an air pump (15) and a reel (16). One end of the telescopic tube (18) is connected to the collection head (19), and the other end is connected to the connecting hose (17). The connecting hose (17) is wound on the reel (16). The reel (16) is fixed on the top of the collection box (1). The end of the connecting hose (17) away from the telescopic tube (18) is connected to the air pump (15). The air pump (15) is used to deliver air to the gas collecting pipe (3).

8. The exhaust gas collection device for environmental detection according to claim 2, characterized in that: A sealing ring (23) is fixed on the sealing cover (21), and the sealing ring (23) is used to fill the gap between the sealing cover (21) and the bottle mouth of the collecting bottle (2).

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