Floating bacteria sampler

Abstract

The utility model provides a planktonic bacteria sampler which comprises a sampler module, an air extractor, a micro differential pressure module and a control module, the sampler module is connected with the air extractor, an airflow pipeline for airflow circulation is arranged between the sampler module and the air extractor, and a narrow pipe diameter section with a reduced pipe diameter is arranged in the airflow pipeline; the micro-differential pressure module comprises a first pipeline, a second pipeline and a micro-differential pressure sensor, the first pipeline and the second pipeline are both connected with the micro-differential pressure sensor, and the first pipeline and the second pipeline are connected with the portions, located in front of and behind the narrow-pipe-diameter section, of the airflow pipeline respectively; and the control module is connected with the air extractor and the micro differential pressure sensor, and is used for acquiring the flow information of the airflow pipeline and controlling the operation of the air extractor. According to the planktonic bacteria sampler, flow information is obtained through the micro-differential pressure module, the size is smaller, and the cost is lower; the arrangement mode of the micro-differential pressure module is more flexible, and further miniaturization of the planktonic bacteria sampler is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of environmental detection, more accurately relates to a planktonic bacteria sampler. BACKGROUND

[0002] The planktonic bacteria sampler is used for collecting microorganisms suspended in air, is based on the Anderson impact principle, is designed by a porous suction type, sucks in ambient gas by using a suction device, collects particles in air, and makes the particles directly impact a flat plate culture medium surface. After the active microorganisms on the particles are cultured, colony calculation is carried out. The planktonic bacteria sampler can accurately detect the microorganism pollution in air and is widely applied in the fields of pharmaceutical industry, biological engineering, food and beverage industry, and medical health.

[0003] The existing planktonic bacteria sampler comprises a culture dish, a suction power device, and a flowmeter. The flowmeter needs to be integrally arranged on the airflow passage. The existing flowmeter is generally large in size and high in price, is not conducive to the miniaturization of the equipment, and is also high in overall cost of the equipment.

[0004] In summary, the existing planktonic bacteria sampler needs to be improved to reduce the size and production cost. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a planktonic bacteria sampler, which adopts a micro pressure difference module, the micro pressure difference module is arranged in combination with an airflow pipeline, so as to reduce the size and production cost of the equipment.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a planktonic bacteria sampler, which comprises a sampler module, an air extraction device, a micro pressure difference module, and a control module. The sampler module is connected with the air extraction device for extracting airflow. An airflow pipeline for airflow circulation is arranged between the sampler module and the air extraction device. The airflow pipeline has a narrow pipeline diameter section with a reduced pipeline diameter. The micro pressure difference module comprises a first pipeline, a second pipeline, and a micro pressure difference sensor. The first pipeline and the second pipeline are connected with the micro pressure difference sensor. The first pipeline and the second pipeline are respectively connected with the portions of the airflow pipeline located before and after the narrow pipeline diameter section. The control module is connected with the air extraction device and the micro pressure difference sensor, and is used for acquiring the flow information of the airflow pipeline and controlling the operation of the air extraction device.

[0007] Preferably, the sampler module comprises a base, a porous sampling head, and a culture dish. The porous sampling head is covered on the base to form a sampling space and cover the culture dish. A bottom plate of the base is connected with a downwardly extending air outlet pipe in communication. The air outlet pipe is connected with the air extraction device. A plurality of supporting legs surrounding the inlet end of the air outlet pipe are arranged on the bottom plate. The culture dish is installed on the supporting legs.

[0008] Preferably, the outflow pipe has an annular protrusion on the inner wall, the airflow duct comprises the outflow pipe, the narrow pipe diameter section is a section of the outflow pipe having the annular protrusion on the inner wall, and the first duct and the second duct are respectively connected with the outflow pipe in front of and behind the annular protrusion along the extending direction of the outflow pipe.

[0009] Preferably, the bottom plate has a tapered opening gradually reducing in aperture from the inlet end to the outlet end in the area surrounded by the supporting leg, and the outlet end of the tapered opening is connected with the inlet end of the outflow pipe.

[0010] Preferably, the periphery of the culture dish has a spacing from the multi-hole sampling head.

[0011] Preferably, the cover has a plurality of uniformly distributed holes on the top of the multi-hole sampling head of the base, for the airflow to enter the sampling space through the holes and impact the surface of the culture dish.

[0012] Preferably, the air extraction device is a pump or a fan.

[0013] Preferably, the sampler module further comprises a cover body detachably mounted on the inlet end of the multi-hole sampling head.

[0014] Compared with the prior art, the planktonic bacteria sampler has the advantages that: the planktonic bacteria sampler acquires flow information through a micro pressure difference module, has a smaller volume and a lower cost, and the micro pressure difference module is arranged in a more flexible manner, which is helpful to further miniaturization of the planktonic bacteria sampler. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0016] Figure 1 The structure of the planktonic bacteria sampler is shown. DETAILED DESCRIPTION

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components; when an component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there can be an intervening component; unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] In utility models, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] like Figure 1 As shown, this application discloses a planar bacteria sampler comprising a sampler module 1, an air extraction device 2, a micro-pressure differential module 3, and a control module 4. The sampler module 1 is connected to the air extraction device 2 for extracting airflow, and an airflow pipe 5 for airflow passage is provided between the sampler module 1 and the air extraction device 2. The airflow pipe 5 has a narrow pipe diameter section 50 with a reduced pipe diameter. The micro-pressure differential module 3 includes a first pipe 31, a second pipe 32, and a micro-pressure differential sensor 33. Both the first pipe 31 and the second pipe 32 are connected to the micro-pressure differential sensor 33, and the first pipe 31 and the second pipe 32 are respectively connected to the front and rear portions of the airflow pipe 5 of the narrow pipe diameter section 50. The control module 4 is connected to the air extraction device 2 and the micro-pressure differential sensor 33, and is used to acquire the flow rate information of the airflow pipe and control the operation of the air extraction device 2.

[0021] The air extraction device 2 is an air extraction device, which can be a pump or a fan, and is used to extract air flow during operation. The air flow pipeline 5 has a narrow pipe diameter section 50 with a reduced pipe diameter, so that the inner diameter of the air flow pipeline forms a large-small-large sequence before, in and after the narrow pipe diameter section. The micro pressure difference sensor 33 obtains pressure difference information at two connection positions in the air flow pipeline 5 through the first pipeline 31 and the second pipeline 32, and the control module 4 obtains flow information according to the pressure difference information detected by the micro pressure difference sensor 33, and the control module 4 can control and adjust the working state of the air extraction device 2. Here, the control module 4 includes a control circuit board, and is not specifically limited as long as it can obtain flow information according to pressure difference and control and adjust the working state of the pump or fan. The micro pressure difference module 3 used in the planktonic bacteria sampler has a small volume and low cost, and is better in flexibility in combination with the air flow pipeline 5, which is conducive to the overall miniaturization.

[0022] Specifically, the sampler module 1 includes a base 13, a porous sampling head 11 and a culture dish 12. The porous sampling head 11 is covered on the base 13 to form a sampling space and cover the culture dish 12. The bottom plate 131 of the base 13 is connected with a downwardly extending air outlet pipe 132 in communication. Here, the connection can be an integrated molding connection or a detachable connection. The air outlet pipe 132 is connected in communication with the air extraction device 2. A plurality of supporting legs 133 are arranged around the inlet end of the air outlet pipe 132 on the bottom plate 131. The culture dish 12 is installed on the supporting legs 133. It can be understood that the inlet end of the air outlet pipe 132 refers to the inlet of the air flow into the air outlet pipe during the operation of the planktonic bacteria sampler.

[0023] As an optional embodiment, the bottom plate of the base 13 has a through opening, and a downwardly extending air outlet pipe 132 is connected in communication with the opening, where the opening is in communication with the inlet end of the air outlet pipe 132; the air outlet pipe 132 is connected in communication with the air suction device 2, where the air outlet pipe 132 can be directly connected with the air suction device 2 or connected in communication with the air suction device 2 through a connecting pipe. It can be understood that the pipeline between the inlet end of the air outlet pipe 132 and the air inlet of the air suction device 2 is the airflow pipeline 5, which includes the air outlet pipe 132. When the air outlet pipe 132 is directly connected with the air suction device 2, the air outlet pipe 132 is the airflow pipeline 5. When the air outlet pipe 132 is connected with the air suction device 2 through a connecting pipe, the air outlet pipe 132 and the connecting pipe are the airflow pipeline 5. The above-mentioned airflow pipeline 5 has a narrow-diameter section 50 with a reduced diameter, which can be on the air outlet pipe 132 or on the connecting pipe. The air outlet pipe 132 can be a section or composed of multiple pipelines connected with each other. The base 13 is provided with multiple support legs 133 arranged around the opening, and the culture dish 12 is installed on the support legs 133, so that there is a height difference between the culture dish 12 and the bottom plate 131, which is convenient for the airflow to impact the culture dish 12 and then be discharged downward from the culture dish 12, from the opening on the bottom plate of the base 13, and through the air outlet pipe 132.

[0024] The inner wall of the air outlet pipe 132 has an annular protrusion 501, the airflow pipeline 5 includes the air outlet pipe 132, and the narrow-diameter section 50 is a section of the air outlet pipe with the annular protrusion 501 on the inner wall. Along the extension direction of the air outlet pipe 132, the first pipeline 31 and the second pipeline 32 are connected in communication with the air outlet pipe 132 before and after the annular protrusion 501, respectively. Here, the narrow-diameter section 50 is on the air outlet pipe 132, the annular protrusion 501 on the inner wall of the air outlet pipe 132 makes the inner diameter of this part small to form the narrow-diameter section 50, and the first pipeline 31 and the second pipeline 32 are connected in communication with the air outlet pipe 132 before and after the annular protrusion 501, respectively, so that the inner diameter of the air outlet pipe 132 at the connection between the first pipeline 31 and the air outlet pipe 132, the inner diameter with the annular protrusion 501, and the inner diameter of the air outlet pipe 132 at the connection between the second pipeline 32 and the air outlet pipe 132 form a large-small-large relationship. Here, the narrow-diameter section with the annular protrusion extends along the extension direction of the air outlet pipe, and within the error range, the inner diameter of the narrow-diameter section can be uniform. Here, no specific limitation is made.

[0025] The bottom plate 131 has a tapered opening 134 with a gradually reduced hole diameter from the inlet end to the outlet end in the area surrounded by the support legs 133, and the outlet end of the tapered opening 134 is connected in communication with the inlet end of the air outlet pipe 132. Here, the above-mentioned opening of the bottom plate 131 is limited to the tapered opening, which is conducive to the airflow impacting the culture dish and then being discharged quickly downward from the culture dish 12, from the tapered opening of the base 13, around the culture dish 12.

[0026] The periphery of the culture dish 12 has a spacing with the multi-hole sampling head 11, and the airflow impacts the culture dish 12 and then is discharged from the gap of the spacing and the air outlet pipe 132.

[0027] The multi-hole sampling head 11 has a plurality of uniformly distributed holes 111, and the top of the multi-hole sampling head 11 which is covered on the base 13 has a plurality of uniformly distributed holes 111, which are used for the airflow to enter the sampling space and impact the surface of the culture dish 12, and here the top of the multi-hole sampling head 11 is opposite to the base.

[0028] The sampler module 1 further comprises a cover 14 which is detachably installed on the inlet end of the sampling pipe 13, and it can be understood that the cover 14 is arranged on the top of the multi-hole sampling head 11 and is removed in use.

[0029] As an implementable mode, the multi-hole sampling head 11 is a cylinder-like shape, has an opening at the bottom, and the bottom plate 131 of the base 13 can form a step at the edge, and the cylinder-like multi-hole sampling head 11 can be fitted on the step of the bottom plate 131 through the bottom opening, and the top can be a concave sampling head, the top of the sampling head has a plurality of uniformly distributed holes 111, and the cover 14 is arranged on the multi-hole sampling head 11 in the non-working state, i.e. on the airflow inlet end of the multi-hole sampling head 11.

[0030] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plankton sampler, characterized in that, The sampler module, the air extraction device, the micro-pressure difference module and the control module are connected, and the air flow pipeline for air flow circulation is arranged between the sampler module and the air extraction device, and the narrow pipeline diameter section with reduced pipeline diameter is arranged in the air flow pipeline; the micro-pressure difference module comprises a first pipeline, a second pipeline and a micro-pressure difference sensor, the first pipeline and the second pipeline are connected with the micro-pressure difference sensor, and the first pipeline and the second pipeline are connected with the parts before and after the narrow pipeline diameter section on the air flow pipeline respectively; the control module is connected with the air extraction device and the micro-pressure difference sensor, and is used for acquiring the flow information of the air flow pipeline and controlling the operation of the air extraction device.

2. The plankton sampler of claim 1, wherein The sampler module comprises a base, a porous sampling head and a culture dish, the porous sampling head is covered on the base to form a sampling space and cover the culture dish, and the bottom plate of the base is connected with a downward extending air outlet pipe in communication; the air outlet pipe is connected with the air extraction device; a plurality of supporting legs surrounding the inlet end of the air outlet pipe are arranged on the bottom plate, and the culture dish is installed on the supporting legs.

3. The plankton sampler of claim 2, wherein The inner wall of the air outlet pipe is provided with an annular protrusion, the air flow pipeline comprises the air outlet pipe, the narrow pipeline diameter section is a section of the air outlet pipe with the annular protrusion, and the first pipeline and the second pipeline are in communication with the air outlet pipe before and after the annular protrusion respectively along the extending direction of the air outlet pipe.

4. The plankton sampler of claim 2, wherein The bottom plate is provided with a conical opening with a gradually reduced hole diameter from the inlet end to the outlet end in the area surrounded by the supporting legs, and the outlet end of the conical opening is in communication with the inlet end of the air outlet pipe.

5. The plankton sampler of claim 2 wherein, The culture dish has a spacing between the periphery and the porous sampling head.

6. The plankton sampler of claim 5, wherein, The top of the porous sampling head covered on the base is provided with a plurality of uniformly distributed holes, and the air flow enters the sampling space through the holes and impacts the surface of the culture dish.

7. The plankton sampler of claim 1, wherein The air extraction device is a pump or a fan.

8. The plankton sampler of claim 3 wherein, The sampler module further comprises a cover body which is detachably installed on the inlet end of the porous sampling head.

Images