CN218937907U - atmospheric sampler - Google Patents

Abstract

The utility model relates to the technical field of collecting atmospheric samples and provides an atmospheric sampler. The atmospheric sampler includes: a sampling pump casing, the interior of the sampling pump casing has a cavity; a Venturi tube, which is arranged on one side of the sampling pump casing and communicates with the cavity; and a first air inlet, connected to the cavity Venturi tube Unicom setting. By connecting a Venturi tube on one side of the sampling pump box, using the principle of the Venturi tube, the gas collected by the sampling pump box forms a gas flow to generate a low-pressure area inside the Venturi tube, and in the low-pressure area of the Venturi tube The first air inlet is set at the place, thus realizing dual-channel acquisition. Under a certain power consumption, the amount of atmospheric collection is greatly increased, and dual gas path collection with different flow rates is realized, which saves costs and improves work efficiency.

Description

atmospheric sampler

technical field

The utility model relates to the technical field of collecting atmospheric samples, in particular to an atmospheric sampler.

Background technique

Atmospheric sampler is an instrument or device that collects atmospheric pollutants or polluted air. As the country pays more and more attention to environmental issues, there are more and more types of atmospheric samplers. Atmospheric samplers currently used have one air inlet and one air outlet. If a dual-channel sampler is to be satisfied, two power sources need to be installed. This method not only increases the cost of the sampler, but also increases the weight of the sampler. and energy consumption.

Utility model content

The utility model provides an atmospheric sampler, which is used to solve the defect of low sample collection efficiency of the atmospheric sampler in the prior art, and realizes dual-channel or even multi-channel collection.

The utility model provides an atmospheric sampler, comprising:

A sampling pump box, which has a cavity inside the sampling pump box;

a Venturi tube, the Venturi tube is arranged on one side of the sampling pump casing and communicates with the cavity; and

The first air inlet is provided in communication with the Venturi tube.

In this embodiment, the Venturi tube is arranged on one side of the sampling pump box and communicates with the cavity. Using the principle of the Venturi tube, the gas collected by the sampling pump box forms a gas flow so that A low-pressure area is generated inside the Venturi tube, thereby realizing two-way collection of the atmosphere. Under a certain power consumption, the amount of atmospheric collection is greatly increased, the cost is saved, and the work efficiency is improved; among them, the first air inlet is located at In the low-pressure area of the Venturi tube, when there is gas passing through, the atmosphere will enter the low-pressure area through the first air inlet, thus realizing a double channel. The function of the first air inlet is to provide a channel for the low-pressure area of the Venturi tube to connect with the outside world.

The inside of the venturi tube is provided with a flow regulator for adjusting and stabilizing the air flow of the first air inlet.

According to an atmospheric sampler provided by the utility model, the flow regulator includes:

An adjustment piston is arranged inside the Venturi tube;

a spring mount mounted inside said venturi; and

The adjustment spring is fixedly connected to the adjustment piston and the spring holder at both ends respectively.

According to an atmospheric sampler provided by the utility model, the Venturi tube includes:

a throat, the first air inlet communicates with the throat;

Two shrinkage tubes, the narrow ends of the two shrinkage tubes are respectively connected to the two ends of the throat;

an intake pipe, one end is connected to the wide end of one of the shrink tubes, and the other end is connected to the sampling pump box; and

The air outlet tube is connected with the wide end of another said shrink tube.

According to the atmospheric sampler provided by the utility model, the flow regulator is arranged inside the intake pipe and the contraction tube connected with the intake pipe.

According to the atmospheric sampler provided by the utility model, the adjustment piston is movable inside the contraction tube.

According to the atmospheric sampler provided by the utility model, the structure of the adjusting piston is a cone or a circular platform, and the end of the adjusting piston with a small cross section is arranged towards the throat.

According to the atmospheric sampler provided by the present invention, the diameter of the largest cross-section of the regulating piston is larger than the diameter of the throat, and the diameter of the smallest cross-section of the regulating piston is smaller than the diameter of the throat.

According to an atmospheric sampler provided by the utility model, a second air inlet is connected to the casing of the sampling pump.

According to the atmospheric sampler provided by the utility model, the inside of the piston is hollow.

One or more technical solutions in the embodiments of the utility model have at least one of the following technical effects:

By connecting a Venturi tube on one side of the sampling pump box, using the principle of the Venturi tube, the gas collected by the sampling pump box forms a gas flow that generates a low-pressure area inside the Venturi tube, and in the low-pressure area of the Venturi tube The first air inlet is set at the first air inlet, and when gas passes through the low-pressure area of the Venturi tube, the atmosphere will enter the low-pressure area through the first air inlet, thereby realizing a dual channel. The utility model realizes the two-way collection of the air, greatly increases the amount of air collection under a certain power consumption, saves the cost, and improves the working efficiency.

At the same time, the utility model is provided with a flow regulator inside the Venturi tube to adjust and stabilize the air flow of the first air inlet. The pressure in the low-pressure area of the Venturi tube determines the air intake of the first air inlet. The stability of the Venturi tube low-pressure area depends on the gas flow into the area, and the role of the flow regulator is to control the flow of air flow to the Venturi tube low-pressure area, thereby ensuring the pressure of the Venturi tube low-pressure area stability.

Description of drawings

In order to more clearly illustrate the technical solutions in the utility model or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are For some embodiments of the present utility model, for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

Fig. 1 is the structural representation of the atmospheric sampler provided by the utility model;

Fig. 2 is a structural schematic diagram of the Venturi tube part of the atmospheric sampler provided by the utility model.

Reference signs:

1: motor; 2: sampling pump box; 3: second air inlet; 4: first air inlet; 5: shrink tube; 6: air outlet pipe; 7: throat; 8: adjustment piston; 9: adjustment Spring; 10: spring holder; 11: intake pipe.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the technical solutions in the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the utility model. Obviously, the described embodiments are the embodiment of the utility model. Some of the embodiments are novel, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the embodiments of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "first" and "second" are for the purpose of clearly illustrating the numbering of product components and do not represent any substantial difference. The directions of "up" and "down" are all subject to the directions shown in the drawings. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present utility model according to specific situations. Also, "plurality" means two or more. "And/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The following describes the utility model in conjunction with Fig. 1-Fig. 2. The utility model provides an atmospheric sampler.

Referring to Figure 1 and Figure 2, according to some embodiments of the present utility model, including:

The sampling pump case 2 has a cavity inside the sampling pump case 2. Of course, in order to generate a directional airflow inside the sampling pump case 2, a motor 1 and a motor 1 must be arranged outside the sampling pump case 2. It provides power for the devices inside the sampling pump box. As for the device inside the sampling pump box 2 is the prior art of sampling pumps, it will not be repeated here. It should be noted that the shape of the sampling pump casing 2 is not limited to the cuboid shown in FIG. 1 , and may be circular, spiral, etc. In fact, as long as a cavity can be formed and a box of any shape containing a directional air duct can be used;

Venturi tube, the Venturi tube is set on one side of the sampling pump box 2 and communicates with the cavity. Using the principle of the Venturi tube, the gas output from the sampling pump box 2 forms a gas flow to generate a low pressure inside the Venturi tube area, so as to realize the two-way collection of the atmosphere. Under a certain power consumption, the amount of atmospheric collection is greatly increased, the cost is saved, and the work efficiency is improved;

The first air inlet 4 is set in communication with the Venturi tube. The first air inlet 4 is located in the low-pressure area of the Venturi tube. When gas passes through, the atmosphere will enter the low-pressure area through the first air inlet 4, thereby realizing Dual access. The function of the first air inlet 4 is to provide a channel for the low-pressure area of the Venturi tube to connect with the outside world. It should be noted that the number of first air inlets 4 is not limited to one as shown in FIG. 1 , but may be multiple, and a plurality of first air inlets 4 may be evenly arranged outside the Venturi tube in a circular array, It can also be evenly arranged in some sections of the Venturi tube, and it is set according to the actual situation.

With reference to Fig. 1 and Fig. 2, in some embodiments of the present utility model, the inside of Venturi tube is provided with the flow regulator for regulating and stabilizing the gas flow of the first air inlet 4, the pressure size of Venturi tube low-pressure zone Determines the stability of the intake air volume of the first air inlet 4, and the pressure of the low-pressure area of the Venturi tube depends on the flow of air flowing into this area, and the function of the flow regulator is to control the flow of air flow to the low-pressure area of the Venturi tube , so as to ensure the pressure stability in the low-pressure area of the Venturi tube.

Referring to Figure 2, in some embodiments of the present invention, the flow regulator includes:

Adjusting the piston 8, the adjusting piston 8 is arranged inside the Venturi tube, and by controlling the distance between the adjusting piston 8 and the throat 7, the air flow entering the throat 7 is controlled, thereby controlling the pressure at the throat 7;

The spring fixing frame 10 is erected inside the Venturi tube, and the function of the spring fixing frame 10 is to provide support for the adjusting piston 8 and the adjusting spring 9 . Wherein the structure of the spring holder 10 includes a circular ring, which is fixed inside the intake pipe 11, and in the middle of the circular ring, there are several support rods fixed in the middle of the circle, and the middle of the several support rods is common. Connected with a base, one end of the adjustment spring 9 is fixedly connected with the spring holder 10 through the base;

The adjustment spring 9 is fixedly connected to the adjustment piston 8 and the spring holder 10 at both ends. The flexible connection with the adjustment spring 9 can control the position of the adjustment piston 8 on the one hand, and make the adjustment piston 8 in the inner position of the shrink tube 5 on the other hand. It is more flexible, so that the shrink tube 5 can control the air flow of the throat 7 more flexibly.

In this embodiment, the flow regulator composed of the adjustment piston 8, the adjustment spring 9 and the spring holder 10 utilizes the elasticity of the adjustment spring 9 to adjust the relative flow rate of the adjustment piston 8 by matching the size of the airflow entering the intake pipe 11. position, the adjustment and stability of the air pressure inside the throat 7 are skillfully achieved. When the airflow entering the intake pipe 11 becomes larger, the adjusting spring 9 will make corresponding adjustments quickly, so that the adjusting piston 8 is closer to the throat 7, thereby reducing the airflow entering the throat 7. On the same principle, when the airflow entering the intake pipe 11 becomes smaller, the adjustment spring 9 keeps the adjustment piston 8 away from the throat 7, thereby increasing the airflow entering the throat 7. This ensures the stability of the air pressure in the throat 7 . In addition, the relative position of the spring holder 10 directly affects the adjustment of the air pressure in the throat 7 by the adjustment piston 8 , that is, affects the sampling flow rate of the first air inlet 4 . When the spring holder 10 is far away from the throat 7, the sampling flow of the first air inlet 4 is relatively large; when the spring holder 10 is relatively close to the throat 7, the sampling flow of the first air inlet 4 is relatively large. Relatively small.

It should be noted that, in this embodiment, in order to be able to adjust the sampler flow rate of the first air inlet 4, the utility model can be provided with an adjustment mechanism on the air inlet pipe 11, and the adjustment mechanism can adjust the spring holder 10 and the throat 7, and the position of the spring holder 10 can be fixed. In this way, the effect of adjusting the flow rate of the first air inlet 4 can be achieved. It can specifically be that the spring holder 10 is slidably connected to the inside of the intake pipe 11, the spring holder 10 is fixedly equipped with a driving rod, the air inlet pipe 11 is provided with a sliding hole along its length direction, the driving rod passes through the sliding hole and With its sliding connection, two rows of fixed blocks can also be fixedly installed on the outer edge of the chute along the length direction of the chute. Several uniform pin holes are provided on the fixed block, and jacks corresponding to the pin holes are provided on the driving rod. , when needing to adjust the position of spring holder 10, just can slide driving lever, when needing the position of spring holder 10 is fixed, can pass two pin holes and jack by latch. In order to prevent the gas inside the air intake pipe 11 from leaking from the sliding hole, a sealing groove can be provided on the surface of the air inlet pipe 11 along the sliding hole, and a sealing strip is arranged in the sealing groove. The sealing strip is divided into two sections, located on both sides of the lever respectively. When adjusting the driving lever every time, the sealing strip is removed first, and after the driving lever is fixed, the sealing strip is installed. In order for the spring fixing frame 10 to be evenly stressed during the toggling process, two groups of the above-mentioned structures can be arranged symmetrically.

Referring to Figure 2, in some embodiments of the present invention, the Venturi tube includes:

Throat 7, the first air inlet 4 communicates with throat 7, and the diameter of throat 7 is the minimum cross-sectional area of Venturi tube;

Two shrinkage tubes 5, the narrow ends of the two shrinkage tubes 5 are respectively connected to the two ends of the throat 7, and the two shrinkage tubes 5 and the throat 7 form a structure with the narrowest middle and gradually widening at both ends. When a large amount of gas comes in from one end, due to the narrowing of the throat 7, the velocity of the airflow increases when it reaches this place, thereby creating a low-pressure area at the throat 7, so that the air at the first air inlet 4 is under the action of atmospheric pressure. Enter the inside of the throat 7 through the first air inlet 4, thereby increasing the collection of the atmosphere;

Intake pipe 11, one end is connected to the wide end of one of the shrink tubes 5, and the other end is connected to the sampling pump casing 2, the function of the air inlet pipe 11 is mainly used to connect the cavity inside the sampling pump casing 2; and

Air outlet pipe 6 is connected with the wide end of another shrinkage pipe 5 .

In this embodiment, the venturi tube can be fixedly connected to the sampling pump case 2 or connected detachably. The fixed connection can be welding, riveting, etc. In order to fix the Venturi tube more firmly, several connecting plates can be welded between the sampling pump casing 2 and the Venturi tube. It will not be described in detail here, and the selection can be made according to the actual situation.

It should be noted that the specific scheme of the detachable connection mentioned in the previous paragraph is: a connecting pipe is fixedly installed at the air outlet of the sampling pump box 2, and the size of the connecting pipe matches the intake pipe 11. Preferably, the connection The pipe can be inserted into the intake pipe 11, and threads are provided on the periphery of the connecting pipe. As for the intake pipe 11, a nut is installed on the outer periphery of the intake pipe 11, which is provided with an internal thread, and the internal thread of the nut matches the external thread of the connecting pipe. When a Venturi tube needs to be installed, the connecting pipe can be inserted into the intake pipe 11, and then connected to the screw thread on the connecting pipe through a nut. In order to facilitate the increase of friction during connection, anti-slip stripes can be provided on the periphery of the nut, or several picks can be evenly arranged along the diameter of the nut to increase the torque. This way can make the utility model have two modes, one is one air outlet and one air inlet, and the other is one air outlet and two air inlets. This can make it convenient for the staff to choose any mode in the actual work process. When the Venturi tube is removed, the utility model has a mode of an air outlet and an air inlet. When a Venturi tube is installed, the utility model has a mode of one air outlet and two air inlets. And it is very convenient to switch between the two modes.

Referring to FIG. 2 , in some embodiments of the present invention, the flow regulator is arranged inside the intake pipe 11 and the shrink tube 5 connected with the intake pipe 11 . The function of the flow adjustment is mainly to control the air flow entering the throat 7 , thereby stabilizing the air pressure at the throat 7 . Therefore, the flow regulator must be arranged before the inlet end of the throat 7 . It should be noted that the location of the flow regulator is not limited to the inside of the intake pipe 11 and the shrink tube 5 connected to the intake pipe 11 . As long as it is located inside the Venturi tube and in front of the intake end of the throat 7, part of it can be located inside the intake pipe 11, the other part can be located inside the shrink tube 5 at the intake end of the throat 7, or it can all be located in the throat. The inside of the shrink tube 5 at the inlet end of the road 7.

Referring to FIG. 2 , in some embodiments of the present invention, the adjustment piston 8 is movable inside the shrink tube 5 . The main purpose of adjusting the movement of the piston 8 inside the shrink tube 5 is to make the change of the air flow at the intake pipe 11 change the relative position of the adjustment piston 8, so that when the air flow at the intake pipe 11 changes, the relative position of the adjustment piston 8 will be adjusted. The larger position can adjust the air flow into the throat 7 . Therefore, when the air flow at the intake pipe 11 changes, the adjustment piston 8 makes corresponding adjustments to ensure the stability of the air pressure at the throat 7 .

Referring to FIG. 2 , in some embodiments of the present invention, the adjusting piston 8 is structured as a cone or a circular platform, and the end of the adjusting piston 8 with a smaller cross-section is arranged toward the throat 7 . Only when the end with the smaller cross section of the adjusting piston 8 is set towards the throat 7 can the air flow entering the throat 7 be adjusted.

Referring to FIG. 2 , in some embodiments of the present invention, the diameter of the largest cross section of the adjusting piston 8 is larger than the diameter of the throat 7 , and the diameter of the smallest cross section of the adjusting piston 8 is smaller than the diameter of the throat 7 . This setting can make the adjustment piston 8 partly enter the inside of the throat 7, and not all be counted into the inside of the throat 7, so as to regulate the air flow entering the throat 7.

Referring to FIG. 1 , in some embodiments of the present invention, a second air inlet 3 is communicated with the sampling pump case 2 . The function of the second air inlet 3 is to take in air. When a low-pressure area is generated inside the sampling pump casing 2, the external gas can enter the inside of the sampling pump casing 2 through the second air inlet 3, and then play a role Collect the effects of the atmosphere.

Referring to Fig. 2, in some embodiments of the present invention, the inside of the piston 8 is hollow. The purpose of its hollow interior is to facilitate the separation of the piston 8 from the inner wall of the shrink tube 5, thereby better adjusting the airflow at the throat 7.

In the embodiments of the present utility model, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature may pass through Intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (10)

1. An atmospheric sampler, comprising:

the sampling pump comprises a sampling pump box body (2), wherein a cavity is formed in the sampling pump box body (2);

the venturi tube is arranged on one side of the sampling pump box body (2) and is communicated with the cavity; and

and the first air inlet (4) is communicated with the venturi tube.

2. An atmospheric sampler according to claim 1, wherein the venturi is internally provided with a flow regulator to regulate and stabilize the air flow of the first air inlet (4).

3. The atmospheric sampler of claim 2, wherein the flow regulator comprises:

an adjusting piston (8) arranged inside the venturi tube;

a spring holder (10) mounted inside the venturi tube; and

and the two ends of the adjusting spring (9) are fixedly connected with the adjusting piston (8) and the spring fixing frame (10) respectively.

4. An atmospheric sampler according to claim 3 in which the venturi comprises:

a throat (7), the first air inlet (4) being in communication with the throat (7);

the two shrinkage pipes (5) are respectively connected with the narrow ends of the two shrinkage pipes (5) at the two ends of the throat (7);

one end of the air inlet pipe (11) is connected with the wide end of one of the shrinkage pipes (5), and the other end of the air inlet pipe is connected with the sampling pump box body (2); and

the air outlet pipe (6) is connected with the wide end of the other shrinkage pipe (5).

5. The atmospheric sampler according to claim 4, characterized in that the flow regulator is provided inside the air intake pipe (11) and the shrink tube (5) connected to the air intake pipe (11).

6. Atmospheric sampler according to claim 4 or 5, characterized in that the regulating piston (8) is movably arranged inside the shrink tube (5).

7. An atmospheric sampler according to claim 6 in which the adjusting piston (8) is in the form of a cone or cone, the small cross-section end of the adjusting piston (8) being disposed towards the throat (7).

8. An atmospheric sampler according to claim 7 in which the diameter of the largest cross-section of the adjusting piston (8) is greater than the diameter of the throat (7), and the diameter of the smallest cross-section of the adjusting piston (8) is less than the diameter of the throat (7).

9. The atmospheric sampler according to claim 1, wherein the sampling pump housing (2) is provided with a second air inlet (3) in communication therewith.

10. Atmospheric sampler according to claim 7, characterized in that the piston (8) is hollow inside.

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