CN218937907U - Atmospheric sampler - Google Patents

Abstract

The utility model relates to the technical field of atmospheric sample collection, and provides an atmospheric sampler. The atmospheric sampler includes: the sampling pump box body is internally provided with a cavity; the venturi tube is arranged at one side of the sampling pump box body and is communicated with the cavity; and the first air inlet is communicated with the venturi tube. Through setting up venturi in the one side UNICOM of sampling pump box, utilize venturi's principle, the gaseous formation gas flow that gathers through the sampling pump box produces the low pressure zone in venturi inside to set up first air inlet in venturi's low pressure zone department, thereby realized binary channels and gathered. Under certain power consumption, the amount of atmospheric collection is greatly increased, the collection of double air paths with different flow rates is realized, the cost is saved, and the working efficiency is improved.

Description

Atmospheric sampler

Technical Field

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

Background

An atmospheric sampler is an instrument or device that collects atmospheric contaminants or contaminated air. With the increasing emphasis of the national environmental problem, the variety of the atmospheric sampler is increasing. The current atmospheric sampler is provided with one air inlet and one air outlet, and two power sources are required to be arranged if the double-path sampler is required to be met, so that the cost of the sampler is increased, and the weight and the energy consumption of the sampler are increased.

Disclosure of Invention

The utility model provides an atmospheric sampler, which is used for solving the defect of low efficiency of collecting samples by the atmospheric sampler in the prior art and realizing double-path or even multi-path collection.

The utility model provides an atmospheric sampler, comprising:

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

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

the first air inlet is communicated with the venturi tube.

In this embodiment, the venturi tube is disposed at one side of the sampling pump box and is in communication with the cavity, and by using the principle of the venturi tube, the gas collected by the sampling pump box forms a gas flow so as to generate a low pressure area inside the venturi tube, thereby realizing two paths of collection of the atmosphere, greatly increasing the amount of atmosphere collection under a certain power consumption, saving the cost and improving the working efficiency; the first air inlet is arranged in the low-pressure area of the venturi tube, and when air passes through the venturi tube, the air can enter the low-pressure area through the first air inlet, so that double passages are realized. The first air inlet is used for providing a passage for the low-pressure area of the venturi tube to be connected with the outside.

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

According to the present utility model, there is provided an atmospheric sampler, the flow regulator comprising:

the adjusting piston is arranged inside the venturi tube;

the spring fixing frame is erected inside the venturi tube; and

and the two ends of the adjusting spring are fixedly connected with the adjusting piston and the spring fixing frame respectively.

According to the present utility model, there is provided an atmospheric sampler, the venturi comprising:

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

the narrow ends of the two shrinkage pipes are respectively connected to the two ends of the throat;

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

the air outlet pipe is connected with the wide end of the other shrinkage pipe.

According to the atmospheric sampler provided by the utility model, the flow regulator is arranged in the air inlet pipe and the shrinkage pipe connected with the air inlet pipe.

According to the atmospheric sampler provided by the utility model, the adjusting piston is movably arranged in the shrinkage tube.

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

According to the atmospheric sampler provided by the utility model, 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 the atmospheric sampler provided by the utility model, the sampling pump box body is communicated with the second air inlet.

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

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

through setting up venturi in the one side UNICOM of sampling pump box, utilize venturi's principle, the gaseous formation gas flow that gathers through the sampling pump box produces the low pressure zone in venturi inside to set up first air inlet in venturi's low pressure zone department, when the low pressure zone that gas passed through venturi, the atmosphere can get into the low pressure zone through first air inlet, thereby realized the double pass. The utility model realizes two paths of atmosphere collection, greatly increases the atmosphere collection amount under certain power consumption, saves the cost and improves the working efficiency.

Meanwhile, the utility model is provided with the flow regulator for regulating and stabilizing the air flow of the first air inlet in the venturi tube, the pressure of the low-pressure area of the venturi tube determines the stability of the air inflow of the first air inlet, the pressure of the low-pressure area of the venturi tube depends on the air flow flowing into the area, and the flow regulator is used for controlling the air flow flowing into the low-pressure area of the venturi tube, thereby ensuring the air pressure stability of the low-pressure area of the venturi tube.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an atmospheric sampler provided by the present utility model;

fig. 2 is a schematic view of a venturi portion of the atmospheric sampler provided by the present utility model.

Reference numerals:

1: a motor; 2: a sampling pump box; 3: a second air inlet; 4: a first air inlet; 5: a shrink tube; 6: an air outlet pipe; 7: a throat; 8: an adjusting piston; 9: an adjusting spring; 10: a spring fixing frame; 11: and an air inlet pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In describing embodiments of the present utility model, it should be noted that the terms "first" and "second" are used for clarity in describing the numbering of the product components and do not represent any substantial distinction unless explicitly stated or defined otherwise. The directions of the upper and the lower are all the directions shown in the drawings. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances. Furthermore, the meaning of "plurality" is two or more. In the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally indicates that the associated object is an "or" relationship.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The present utility model provides an atmospheric sampler as described below in connection with fig. 1-2.

Referring to fig. 1 and 2, according to some embodiments of the utility model, there is provided:

the sampling pump box body 2, the inside of sampling pump box body 2 has the cavity, of course, in order to produce directional air current in the inside of sampling pump box body 2, still need set up motor 1 in sampling pump box body 2 outside, motor 1 provides power for the inside device of sampling pump box body, and as for the inside device of sampling pump box body 2 for the prior art of sampling pump, do not make in detail here. The shape of the sampling pump case 2 is not limited to the rectangular parallelepiped shown in fig. 1, and may be circular, spiral, or the like. In fact, it is only necessary to form a cavity and include any shape of box with a directional duct;

the venturi tube is arranged at one side of the sampling pump box body 2 and is communicated with the cavity, and gas output by the sampling pump box body 2 forms gas flow by utilizing the principle of the venturi tube so as to generate a low-pressure area in the venturi tube, thereby realizing two paths of collection of the atmosphere, greatly increasing the quantity of the collection of the atmosphere under certain power consumption, saving the cost and improving the working efficiency;

the first air inlet 4 is communicated with the venturi tube, the first air inlet 4 is arranged in a low-pressure area of the venturi tube, and when gas passes through the venturi tube, the air can enter the low-pressure area through the first air inlet 4, so that double passages are realized. The first air inlet 4 serves to provide a passage for the low pressure region of the venturi to connect with the outside. It should be noted that the number of the first air inlets 4 is not limited to one as shown in fig. 1, and may be plural, and the plural first air inlets 4 may be uniformly arranged outside the venturi tube in a circumferential array, or may be uniformly arranged in a partial section of the venturi tube, and may be set according to actual situations.

Referring to fig. 1 and 2, in some embodiments of the present utility model, a flow regulator for regulating and stabilizing the flow rate of the air from the first air inlet 4 is provided inside the venturi, the pressure of the low-pressure region of the venturi determines the stability of the amount of the air taken from the first air inlet 4, the pressure of the low-pressure region of the venturi depends on the flow rate of the air flowing into the region, and the flow regulator functions to control the flow rate of the air flowing to the low-pressure region of the venturi, thereby ensuring the air pressure stability of the low-pressure region of the venturi.

Referring to fig. 2, in some embodiments of the utility model, a flow regulator includes:

the adjusting piston 8 is arranged in the venturi tube, and the air flow entering the throat 7 is controlled by controlling the distance between the adjusting piston 8 and the throat 7, so that the pressure at the throat 7 is controlled;

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. The structure of the spring fixing frame 10 comprises a circular ring which is fixed in the air inlet pipe 11, a plurality of supporting rods are fixedly and darkly rotated in a circle in the middle of the inside of the circular ring, the middle of the plurality of supporting rods is commonly connected with a base, and one end of the adjusting spring 9 is fixedly connected with the spring fixing frame 10 through the base;

the adjusting spring 9, both ends respectively with adjusting piston 8 and spring mount 10 fixed connection, with the flexible coupling of adjusting spring 9 can control the position of adjusting piston 8 on the one hand, on the other hand makes adjusting piston 8 comparatively nimble in the inside position of shrink tube 5 for shrink tube 5 can more nimble control the airflow of throat 7.

In this embodiment, the flow regulator composed of the adjusting piston 8, the adjusting spring 9 and the spring fixing frame 10 uses the elasticity of the adjusting spring 9, and adjusts the relative position of the adjusting piston 8 by matching the air flow entering the air inlet pipe 11, thereby smartly achieving the regulation and stabilization of the air pressure inside the throat 7. When the air flow into the air inlet pipe 11 becomes larger, the adjusting spring 9 can quickly make corresponding adjustment, so that the adjusting piston 8 is closer to the throat 7, and the air flow into the throat 7 is reduced. In the same principle, when the air flow into the interior of the air intake pipe 11 becomes smaller, the adjusting spring 9 causes the adjusting piston 8 to move away from the throat 7, thereby increasing the air flow into the interior of the throat 7. Thereby ensuring the stability of the air pressure in the throat 7. In addition, the relative position of the spring holder 10 directly influences the regulation of the air pressure in the throat 7 by the regulating piston 8, i.e. the sampling flow of the first air inlet 4. When the spring holder 10 is relatively far from the throat 7, the sampling flow rate of the first air inlet 4 is relatively large, and when the spring holder 10 is relatively close to the throat 7, the sampling flow rate of the first air inlet 4 is relatively small.

In this embodiment, in order to adjust the flow rate of the sampler in the first air inlet 4, an adjusting mechanism may be provided on the air inlet pipe 11, and the adjusting mechanism may adjust the relative positions of the spring fixing frame 10 and the throat 7, and may fix the position of the spring fixing frame 10. This achieves the effect of adjusting the flow rate of the first air inlet 4. The spring fixing frame 10 is slidably connected to the air inlet pipe 11, a deflector rod is fixedly mounted on the spring fixing frame 10, a sliding hole is formed in the air inlet pipe 11 along the length direction of the deflector rod, the deflector rod penetrates through the sliding hole and is slidably connected with the deflector rod, two rows of fixing blocks are fixedly mounted on the outer edge of the sliding groove along the length direction of the sliding groove, a plurality of uniform pin holes are formed in the fixing blocks, insertion holes corresponding to the pin holes are formed in the deflector rod, when the position of the spring fixing frame 10 needs to be adjusted, the deflector rod can be slid, and when the position of the spring fixing frame 10 needs to be fixed, the two pin holes and the insertion holes can be penetrated through by a bolt. In order to prevent the gas in the air inlet pipe 11 from leaking from the sliding hole, a sealing groove may be formed along the sliding hole on the outer surface of the air inlet pipe 11, and a sealing strip may be disposed in the sealing groove. The sealing strip is divided into two sections and is respectively positioned at two sides of the deflector rod. When the deflector rod is adjusted each time, the sealing strip is firstly taken off, and after the deflector rod is fixed, the sealing strip is installed. In order to make the spring fixing frame 10 uniformly stressed in the stirring process, two groups of structures can be symmetrically arranged.

Referring to fig. 2, in some embodiments of the utility model, a venturi includes:

a throat 7, the first air inlet 4 is communicated with the throat 7, and the diameter of the throat 7 is the minimum area of the cross section of the venturi tube;

the two shrinkage pipes 5, the narrow ends of the two shrinkage pipes 5 are respectively connected to the two ends of the throat 7, the two shrinkage pipes 5 and the throat 7 form a structure with the narrowest middle and the gradually widened two ends, when a certain amount of gas enters from one end, the speed of the gas flow is increased when the gas flow reaches the throat 7 due to the narrowing of the throat 7, so that a low pressure area is generated at the throat 7, and the air at the port of the first air inlet 4 enters the throat 7 through the first air inlet 4 under the action of atmospheric pressure, so that the collection of the atmosphere is increased;

one end of the air inlet pipe 11 is connected with the wide end of one of the shrinkage pipes 5, the other end of the air inlet pipe 11 is connected with the sampling pump box body 2, and the air inlet pipe 11 is mainly used for connecting the cavity inside the sampling pump box body 2; and

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

In this embodiment, the venturi tube may be fixedly connected or detachably connected to the sampling pump housing 2. The fixing connection can be welding, riveting and the like, and a plurality of connecting plates can be welded between the sampling pump box body 2 and the venturi tube in order to fix the venturi tube more firmly. The selection may be made according to the actual situation, which is not described in detail herein.

It should be noted that, the specific scheme of the detachable connection in the above paragraph is as follows: a connecting pipe is fixedly installed at the air outlet of the sampling pump box body 2, the size of the connecting pipe is matched with that of the air inlet pipe 11, preferably, the connecting pipe can be spliced with the air inlet pipe 11, and threads are arranged on the periphery of the connecting pipe. As for the air intake pipe 11, a nut is rotatably installed at the outer circumference of the air intake pipe 11, and is provided with an internal thread, and the internal thread of the nut is matched with the external thread of the connecting pipe. When the venturi tube is required to be installed, the connecting tube can be inserted into the air inlet tube 11, and then the connecting tube is connected with threads on the connecting tube through a nut. In order to facilitate increasing the friction force during connection, anti-slip stripes can be arranged on the periphery of the nut, or a plurality of poking sheets are uniformly arranged along the diameter direction of the nut so as to increase torque. This way, the utility model can have two modes, one being one air outlet and one air inlet and the other being one air outlet and two air inlets. Therefore, a worker can conveniently select any mode in the actual working process. The present utility model is a mode of one air outlet and one air inlet when the venturi is removed. The utility model is a mode of one air outlet and two air inlets when the venturi is installed. And the two modes are very convenient to switch.

Referring to fig. 2, in some embodiments of the present utility model, a flow regulator is provided inside the intake pipe 11 and the contraction pipe 5 connected to the intake pipe 11. The effect of the flow regulation is mainly to control the amount of air flow into the throat 7, thereby stabilizing the air pressure at the throat 7. The flow regulator must therefore be located in front of the air inlet end of the throat 7. The position of the flow regulator is not limited to the inside of the intake pipe 11 and the contraction pipe 5 connected to the intake pipe 11. The position may be located in the venturi tube and in front of the air inlet end of the throat 7, and a part of the position may be located in the air intake pipe 11, and the other part may be located in the shrink tube 5 of the air inlet end of the throat 7, or may be located in the shrink tube 5 of the air inlet end of the throat 7.

Referring to fig. 2, in some embodiments of the utility model, an adjusting piston 8 is movably arranged inside the shrink tube 5. The main purpose of the adjusting piston 8 movably arranged inside the shrink tube 5 is to enable the relative position of the adjusting piston 8 to be changed by changing the air flow at the air inlet tube 11, so that when the air flow at the air inlet tube 11 is changed, the air flow entering the throat 7 can be adjusted by increasing the relative position of the adjusting piston 8. Therefore, when the air flow at the air inlet pipe 11 changes, the adjusting piston 8 is correspondingly adjusted, and the air pressure at the throat 7 is ensured to be stable.

Referring to fig. 2, in some embodiments of the utility model, the adjusting piston 8 is configured as a cone or a truncated cone, and the end of the adjusting piston 8 with a smaller cross section is disposed towards the throat 7. Only when the small cross-section end of the adjusting piston 8 is disposed toward the throat 7, the amount of air flow into the throat 7 can be adjusted.

Referring to fig. 2, in some embodiments of the utility model, 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 arrangement allows the adjusting piston 8 to partially enter the interior of the throat 7 and not to fully count into the interior of the throat 7 to thereby adjust the amount of air flow into the interior of the throat 7.

Referring to fig. 1, in some embodiments of the present utility model, a second air inlet 3 is provided in communication with the sampling pump housing 2. The second air inlet 3 is used for air intake, and when the inside of the sampling pump box 2 generates a low pressure area, external air can enter the inside of the sampling pump box 2 through the second air inlet 3, and then the air collection function is achieved.

Referring to fig. 2, in some embodiments of the utility model, the interior of the piston 8 is hollow. The purpose of the hollow interior is to facilitate the detachment of the piston 8 from the inner wall of the shrink tube 5, thereby better regulating the air flow at the throat 7.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

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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