CN117586862A - Design scheme of air microorganism sampler sampling head air inlet end sealing device - Google Patents
Design scheme of air microorganism sampler sampling head air inlet end sealing device Download PDFInfo
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Abstract
The invention relates to a design scheme of an air microorganism sampler sampling head air inlet end sealing device, which is suitable for the design of an automatic sealing and automatic opening device of an air microorganism sampler sampling head air inlet port.
Description
Technical Field
The design scheme of the air microorganism sampler sampling head air inlet end sealing device is suitable for the design of the automatic sealing and automatic opening device of the air microorganism sampler sampling head air inlet port, and after the air microorganism sampler sampling head air inlet port is designed with the device capable of being automatically sealed and opened, the problem that air microorganism sampling cannot be carried out in some occasions can be effectively solved, the application scene of the air microorganism sampler is enlarged, and the air microorganism sampler is a further development of the manufacturing and application technology of the air microorganism sampler.
Background
The air microorganism sampler is a professional microorganism sampling instrument for collecting plankton in the air and is also an important instrument for evaluating microorganism pollution in the environment. Air microorganism sampler is also called as an impact air microorganism sampler or an anderson sampler, and is a cascade impact sampling device for collecting samples of particles with different particle sizes in the atmosphere at the earliest, and as microorganisms in the air are adhered to the surfaces of particles in the air, the air microorganism sampler is widely applied to the collection of airborne microorganisms, has a history of application close to sixty years, and is a common instrument for collecting air microorganisms most commonly used in the fields of current medical treatment, pharmacy, food, public health and microorganism detection.
Fig. 1 is a basic structural diagram of a six-stage impact type air microorganism sampler. The air microorganism sampler is composed of a controller and a sampling head, and the controller is connected with the sampling head through a gas pipeline. The most widely used sampling heads are currently of six stages, but there are also two and eight stage sampling head applications. The invention is illustrated by taking six-stage sampling heads as an example, the working principles of the sampling heads of other stages are basically consistent, meanwhile, the technology expressed by the invention is concentrated on the air inlet ports of the sampling heads, and the design scheme is used for the air inlet ports of all microorganism samplers, so that the description of other types of microorganism samplers is omitted.
In fig. 1, 1 is a 1-stage sampling disk of a sampling head, 2 is a 2-stage sampling disk of a sampling head, 3 is a 3-stage sampling disk of a sampling head, 4 is a 4-stage sampling disk of a sampling head, 5 is a 5-stage sampling disk of a sampling head, 6 is a 6-stage sampling disk of a sampling head, 7 is a top cover of a sampling head, 8 is an air inlet port on the top cover of a sampling head, A is a manual closing cap of the air inlet port of a sampling head, B is an air pump, C is a gas flow meter (device), D is an air pumping pipeline, E is a shock pad of the air pump, F is an air outlet port of the sampling head, G is an air outlet port of the air pump, and H is a controller of an air microorganism sampler. Arrows in the figure indicate the flow direction of the gas. As shown in fig. 1, the main components in the controller of the air microorganism sampler are three parts, namely an air pump, an air flow meter and an electric control system. The sampling head consists of a top cover and sampling discs, wherein six stages of sampling discs are provided with 6 sampling discs, the bottom of each sampling disc is provided with densely distributed small holes, the aperture of the upper sampling disc (1#) is large, and the aperture of the lower sampling disc is gradually reduced. Thus if there are tiny particles in the air, large particles are trapped on the upper sampling plate, and small particles are trapped on the lower sampling plate step by step. Microorganisms in the air generally adhere to the airIf a plate containing a microorganism culture medium is placed on floating particles in each stage of sampling plates, after a sealing cap of an air inlet port of a sampling head of the air microorganism sampler is removed, an air pump is started, air flow enters from the air inlet port of the sampling head under the air pumping action of the air pump and is discharged from an air outlet port of the air pump, and an arrow in FIG. 1 shows the flowing direction of the air flow under the condition that the air inlet port of the sampling head of the air microorganism sampler is opened. After the interception of each stage of sampling plate, the particles carrying the microorganisms are intercepted on the surface of the culture medium-containing plate on each stage of sampling plate, after the sampling is finished, the culture plate is taken out and placed into a microorganism incubator for culturing for a certain time, if the microorganisms are intercepted on the culture plate, the colonies are bred, the bred colonies are counted and calculated, and finally CFU (colony forming unit, unit: colony number/m 3 ) As an index of evaluation. CFU means the number of colonies per cubic meter of air. Further details of the air microorganism sampler are common knowledge to those skilled in the art, and therefore, only the above brief description will be omitted.
The current standard practice of air microorganism sampler is to open the sampling head of the air microorganism sampler in a clean room (or in an ultra clean workbench or in a biosafety cabinet), place a prepared dish (or called "culture dish") containing microorganism culture medium on each sampling plate of the sampling head, and then assemble each sampling plate, wherein the air inlet port of the sampling head must be sealed by a sealing cap to prevent contamination of the culture dish caused by external air entering the sampling head before sampling is not started. And only after the air microorganism sampler is placed in a sampling space and the controller of the air microorganism sampler is connected with the sampling head through the air pipeline, removing a sealing cap (cover) of an air inlet port of the sampling head, and starting an air pump of the air microorganism sampler to pump air to collect particles and microorganisms in the air. After the sampling time is reached, the air pump stops pumping, and the air inlet port of the sampling head must be closed by the closing cap as soon as possible at this time, so as to avoid that the external air enters the culture plate inside the sampling head to be polluted by additional new microorganisms, thereby leading to inaccurate sampling.
At present, when the sterilization performance of a microbial sterilization product is evaluated, the microbial sampling is often needed in the middle of sterilization, and at present, a sampling person wears a protective garment to enter a sterilization space for microbial sampling of the sterilization space, or the sampling person stretches a sampling head into the sterilization space to sample through a transmission window outside. Regardless of the mode, sampling in the middle of disinfection can lead to inaccurate sampling because personnel enter or can not seal a transmission window, or the sampling position of a sampling head deviates from an optimal sampling area, and meanwhile, the disinfection process can be destroyed, and if a disinfection active factor is harmful to a human body, the disinfection active factor can also lead to injury to sampled experimental personnel during the middle link sampling of disinfection. This is all because the air inlet port of the sampling head lacks an automatic closing and opening means.
In addition, in the field of hospital infection control (abbreviated as hospital infection control, or infection control), environmental microorganism sampling is required in each disease area of a hospital, and a microorganism laboratory of the hospital is at a certain distance from microorganism sampling points of each disease area. At present, sedimentation bacteria are commonly collected by adopting a sedimentation method. The culture plate for detecting the sedimentation bacteria can be placed in a sterile bag to be transported to sampling points of various disease areas, and then opened for sampling at the sampling points. However, the collection of microorganisms in each disease area by adopting a sedimentation method can not meet the actual demand of in-hospital sensing control, and the collection and evaluation of plankton are needed to be changed. The plankton must be collected by a microorganism air sampler method, so that the culture plate must be placed in the sampling head of the air microorganism sampler in the unclean space of the sampling point. The removal of the culture plate from the sampling head still needs to be accomplished in an unclean environment at the sampling point after the sampling is completed. Also, if it is desired to sample during the disinfection of the lesion in order to evaluate the disinfection effect even further, it is also necessary to arrange for personnel to enter the site being disinfected, which can lead to destruction of the disinfection effect and chemical injury of the disinfection active factors to the sampled personnel. So the simple solution to the problem is to install a device which can control the closing or opening of the air inlet port of the sampling head at fixed time or remote control on the air inlet port of the sampling head of the air microorganism sampler.
At present, the performance of a disinfectant or sterilizer is evaluated by spraying bacterial liquid in a microorganism laboratory (cabin) with a specific volume, then starting the sterilizer to work to release physical or chemical sterilization factors, then sampling air in the microorganism laboratory (cabin) by using an air microorganism sampler in a specific time, and then evaluating the sterilization performance of the disinfectant or sterilizer according to the air microorganism sampler. A typical sterilization sampling time is sampling at a prescribed sterilization time or at 2 hours. When the air microorganism sampler is used for sampling, an experimenter enters a laboratory (cabin), the air microorganism sampler is started to sample after the sealing cap of the sampling head is opened, the sampler is closed after the specified sampling time is reached, and the sampling head is sealed by the sealing cap. Therefore, at present, the general workflow is to sample after the specified disinfection time, so that the accuracy of sampling is reduced due to the entering of the laboratory personnel, and the actual disinfection effect is destroyed due to the entering of new microorganisms into the laboratory (cabin) due to the entering of the laboratory personnel. If the sample can be taken 0.5h, 1h, 1.5h and 2h after the start of disinfection, the disinfection effect can be evaluated more accurately. However, the laboratory personnel need to repeatedly enter the laboratory for sampling, even if sampling is performed through a sampling window, the sealing performance between the interior and the exterior of the laboratory (cabin) is weakened, so that the microorganism concentration in the laboratory (cabin) is leaked or released, the accuracy of air microorganism sampling is reduced, and the disinfection effect cannot be evaluated more accurately.
However, for reasons that are ignored or other factors by those skilled in the art, no means of automatically closing or opening the air inlet port of the air microorganism sampler sampling head has been presented so far, but in the practice of real air microorganism sampler applications, there is a need for a kit for such a device. The object of the invention is to propose a design of such a device.
Disclosure of Invention
The first technical characteristic of the invention is that a sampling head end opening air flow closing or opening device which can be synchronously controlled with an air pump of the air microorganism sampler is designed at an air inlet port of a sampling head of the air microorganism sampler, the sampling head air inlet port is closed by the device when the air pump does not start pumping (i.e. before sampling is not started), the sampling head air inlet port is opened by the device when the air pump starts pumping (i.e. when sampling is started), and the sampling head air inlet port is closed again by the device when the air pump stops pumping (i.e. when sampling is started). Meanwhile, the device has a delay time or preset time design function, namely, after a certain delay time or preset time is reached, the device automatically opens the air inlet port of the sampling head, and when the sampling time is reached, the device automatically closes the air inlet port of the sampling head. The simplest way to realize the sampling head air inlet port sealing device is to adopt the structural design concept of a sealing cover. The air inlet port of the sampling head of the air microorganism sampler is designed to be fixed on the air inlet port of the sampling head, the air inlet port of the sampling head can be sealed or opened by a sealing cover structure, under the control of a controller of the air microorganism sampler, the air inlet port of the sampling head of the air microorganism sampler is opened by a sealing cover on the sealing device when the sampling of the air microorganism sampler is started, and the air inlet port of the sampling head of the air microorganism sampler is sealed by the sealing cover on the sealing device when the sampling is ended, so that the automatic opening and the sealing of the air inlet port of the sampling head of the air microorganism sampler in a sampling link are realized, and the controller of the air microorganism sampler has the function of delaying time control or presetting time control on the sealing cover on the sealing device.
The invention is technically characterized in that the design scheme of the air inlet end sealing device of the sampling head of the air microorganism sampler has three basic structures, namely a portal frame structure, an eccentric wheel structure and an eccentric shaft structure.
The design scheme of the air microorganism sampler sampling head air inlet end portal frame structure sealing device is shown in fig. 2 and 3, and is characterized in that a basic component of the air microorganism sampler sampling head air inlet end portal frame structure sealing device is composed of a base (17), a driving motor (10), a screw rod upright (11), a slide rod upright (12), a sealing cover (13) and a sealing gasket (14) on the sealing cover, wherein two holes are formed in the sealing cover, one hole is a hole with internal threads and is matched with the screw rod upright, the other hole without internal threads is matched with the slide rod upright, the driving motor is controlled by a controller of an air microorganism sampler (H in fig. 1) to realize clockwise or anticlockwise rotation and drive the screw rod upright to rotate clockwise or anticlockwise, so that the sealing cover is driven to move up and down along the screw rod upright and the slide rod upright, and the air microorganism sampler sampling head air inlet end (8) is accurately positioned and opened depending on up-down positioning switches (15 and 16). Fig. 3 is a structural diagram of an open state of a portal frame structure sealing device at an air inlet end of a sampling head of the air microorganism sampler, and the working principle of the device is not repeated, and can be understood by looking at the drawing. Fig. 4 is a top plan view of a closure cap of a portal frame structure closure device for an air microorganism sampler sampling head, in fig. 4, I is a hole with internal threads, which is matched with a screw rod to drive the closure cap to move up and down, and II is a hole without internal threads, which is used as a sliding hole for positioning a sliding rod. In fig. 2 and 3, 1 is a 1-stage sampling tray (built-in culture dish) of the sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, and 9 is an inner wall of an air inlet column of the sampling head.
The eccentric shaft structure sealing device of the sampling head air inlet end of the air microorganism sampler is shown in fig. 5 and 6. The basic components of the air microorganism sampler are composed of a base (19), a driving motor (10), a sealing cover (13) and a sealing gasket (14) of the sealing cover, and an eccentric shaft (18) is fastened with one side of the sealing cover into a whole and is coupled with a rotating shaft of the driving motor, and the driving motor realizes clockwise or anticlockwise rotation under the control of a controller of the air microorganism sampler, so that the sealing cover is driven to rotate clockwise and anticlockwise by taking the eccentric shaft as a radius center, and the sealing and opening of an air inlet end of a sampling head of the air microorganism sampler are realized. Fig. 5 is a structural view showing an opened state of the eccentric shaft structure closing device, fig. 6 is a structural view showing a closed state of the eccentric shaft structure closing device, in fig. 5 and 6, 1 is a 1-stage sampling plate (a built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, and 9 is an inner wall of an air inlet column of the sampling head.
The eccentric wheel structure sealing device of the sampling head of the air microorganism sampler is shown in fig. 7 and 8. The basic component of the sampling head air inlet end eccentric wheel structure sealing device consists of a base (19), a driving motor (10), a sealing cover (13), a sealing gasket (14) of the sealing cover and a central asymmetric eccentric wheel (20). The eccentric depicted in fig. 7 and 8 is of a heart-shaped design, which is merely an illustration, but not limited to, of a heart-shaped design, and eccentric wherein the center hole (21) of the eccentric is not centered are suitable for the present design. The outer edge of the big end of the eccentric wheel is closely contacted with the protruding part on one side of the sealing cover, the eccentric wheel is closely contacted with the sealing cover in a sliding way (the area marked by A, B and AB in figures 7 and 8), the point A is the contact point of the eccentric wheel with the sealing cover in the opening state, the point B is the contact point of the eccentric wheel with the sealing cover in the closing state, the AB is the area of the eccentric wheel in sliding contact with the sealing cover, and the tensioning spring (S) in figures 7 and 8 plays a role in assisting tensioning. The axial hole of the eccentric wheel is coupled with the rotating shaft of the driving motor, the driving motor rotates clockwise or anticlockwise under the control of the controller of the air microorganism sampler, the eccentric wheel is driven to swing up and down by taking the axial hole of the eccentric wheel as the center, and the opening and closing of the sampling head air inlet closing cover are driven by the self gravity of the closing cover and/or the tension of the tensioning spring, so that the closing and opening of the air microorganism sampler sampling head air inlet end are realized. In fig. 7 and 8, 1 is a 1-stage sampling tray (built-in culture dish) of the sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, and 9 is the inner wall of an air inlet column of the sampling head; fig. 7 is an opened state of a closing device of an eccentric structure of an air microorganism sampler sampling head air inlet end, and fig. 8 is a closed state of a closing device of an eccentric structure of an air microorganism sampler sampling head air inlet end; fig. 9 is a plan view of fig. 7 and 8, in fig. 9, 1 is a level 1 sampling tray of a sampling head (a built-in culture dish, 8 is an air inlet port on a top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft of the closing cover, 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of an air microorganism sampler, and AB is a contact point of an eccentric wheel (peach type) and the closing cover.
The above-mentioned content is the mother structure of portal frame structure, eccentric shaft structure, eccentric wheel structure, can carry on multiple evolution according to the mother structure, but its essence does not take over the basic characteristics of the above-mentioned mother structure, all belong to the technological connotation of this invention. Based on the design of the three basic architectures, the design scheme of the air microorganism multi-way sampler can be constructed, wherein the air microorganism multi-way sampler is connected with a plurality of sampling heads through an air pipeline and an air pipeline electromagnetic valve by adopting an air pump and can be used for collecting the plurality of sampling heads simultaneously or sequentially. The air electromagnetic valve is designed on the air pipeline, the air pump and each electromagnetic valve are controlled by a controller of the air microorganism sampler, and the functions of collecting in turn in a single way, collecting in a multi-way mode at the same time, or collecting in a multi-way or single-way mode at one time in an alternating mode are realized. Fig. 15 shows a schematic diagram of the architecture of an air microorganism sampler with five sampling heads. In fig. 15, S1, S2, S3, S4, S5 respectively represent 5 sampling heads, J1, J2, J3, J4, J5 respectively represent air solenoid valves for opening and closing air gas pipelines, D is an air extraction pipeline, dots on the air extraction pipeline represent pipeline joints for communication, and H represents a controller of the air microorganism sampler. Arrows in the figure indicate the flow direction of the gas. The illustration in fig. 15 is by way of example only and not limitation, and 1-n multiplexed acquisitions may be implemented. The key point is that the pumping quantity of the pumping pump can be matched with the multipath sampling head by selecting a pumping pump with a large pumping quantity or using a plurality of pumping pumps in parallel. Because the required pumping capacity of each sampling head is 28.3L/min according to the prior art regulations, the relation between the pumping capacity of the matched pumping pump and the required pumping capacity of the matched sampling heads is n times of 28.3L/min, and n is the number of the matched sampling heads. According to the current application scene of the air sampler, under the general condition, 1 to 5 sampling heads matched with one air microorganism sampler are moderate, and the actual working requirements can be basically met.
Under the design proposal expressed by the invention, the control of the air microorganism sampler adopts an embedded digital control system which is constructed by an MCU to realize the electric control of the air pump and an electromagnetic valve matched with a sampling head pipeline of the air pump, and besides the function of setting the sampling time, the functions of delaying the sampling start time and timing the sampling start time are added. The delay function is to start the sampling function after a delay of a certain period of time when the set time is 0, and the timing function is to start the sampling function when the set time is a specific time.
The design device can also be used for other occasions needing to be closed, and is not completely limited to the application field of the air microorganism sampler.
Drawings
Fig. 1 is a basic structural diagram of a six-stage impact type air microorganism sampler. In fig. 1, 1 is a 1-stage sampling disk of a sampling head, 2 is a 2-stage sampling disk of a sampling head, 3 is a 3-stage sampling disk of a sampling head, 4 is a 4-stage sampling disk of a sampling head, 5 is a 5-stage sampling disk of a sampling head, 6 is a 6-stage sampling disk of a sampling head, 7 is a top cover of a sampling head, 8 is an air inlet port on the top cover of a sampling head, a is a manual closing cap of the air inlet port of the sampling head, B is an air pump, C is a gas flow meter (device), D is an air extraction pipeline, E is a shock pad of the air pump, F is an air outlet port of the sampling head, G is an air outlet port of the air pump, and H is a controller of an air microorganism sampler. Arrows in the figure indicate the flow direction of the gas.
Fig. 2 is a block diagram of the closed state of the closed device of the portal frame structure at the air inlet end of the sampling head of the air microorganism sampler. In fig. 2, 1 is a 1-stage sampling tray (built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 11 is a screw column, 12 is a slide bar column, 13 is a sealing cover, 14 is a sealing gasket of the sealing cover, 15 is a lower positioning switch, 16 is an upper positioning switch, and 17 is a base of a sealing cover of a portal frame structure of the sampling head of the air microorganism sampler.
Fig. 3 is a structural diagram of the open state of the air microorganism sampler sampling head air inlet end portal frame structure closing device. In fig. 3, 1 is a 1-stage sampling tray (built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 11 is a screw column, 12 is a slide bar column, 13 is a sealing cover, 14 is a sealing gasket of the sealing cover, 15 is a lower positioning switch, 16 is an upper positioning switch, and 17 is a base of a sealing cover of a portal frame structure of the sampling head of the air microorganism sampler.
Fig. 4 is a top plan view of a closure cap of an air microorganism sampler sampling head inlet portal frame structure closure device. In fig. 4, I is a hole with internal threads, which is matched with a screw rod to drive the closing cover to move up and down, and II is a hole without internal threads, which is used as a sliding hole for positioning the sliding rod.
Fig. 5 is a structural diagram of the open state of the eccentric shaft structure closing device of the air microorganism sampler sampling head air inlet end. In fig. 5, 1 is a 1-stage sampling tray (built-in culture m) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft, and 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of the air microorganism sampler.
FIG. 6 is a block diagram of the closed state of the eccentric shaft structure closing device of the air microorganism sampler sampling head air inlet end. In fig. 6, 1 is a 1-stage sampling tray (built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft, and 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of the air microorganism sampler.
Fig. 7 is an open state of the closing means of the eccentric structure of the air microorganism sampler sampling head air inlet end. In fig. 7, 1 is a level 1 sampling disk (built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft of the closing cover, 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of the air microorganism sampler, 20 is an eccentric wheel (peach-shaped), 21 is an axial hole of the eccentric wheel, a point A is a contact point of the eccentric wheel with the closing cover in an opened state, and S is a tensioning spring.
Fig. 8 is a closed state of the closing device of the eccentric structure of the air microorganism sampler sampling head air inlet end. In fig. 8, 1 is a level 1 sampling tray (built-in culture dish) of a sampling head, 7 is a top cover of the sampling head, 8 is an air inlet port on the top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 10 is a driving motor, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft of the closing cover, and 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of the air microorganism sampler. The eccentric wheel (peach-shaped) 20 is an axle center hole of the eccentric wheel 21, the point B is a contact point of the eccentric wheel and the closing cover in a closing state, and the point S is a tensioning spring.
Fig. 9 is a plan view of fig. 7 and 8. In fig. 9, 1 is a level 1 sampling plate of a sampling head (a built-in culture dish, 8 is an air inlet port on a top cover of the sampling head, 9 is an inner wall of an air inlet column of the sampling head, 13 is a closing cover, 14 is a sealing gasket of the closing cover, 18 is an eccentric shaft of the closing cover, 19 is a base of the closing cover of an eccentric shaft structure of the sampling head of the air microorganism sampler, and AB is a contact point of an eccentric wheel (peach type) and the closing cover.
Fig. 10 is a three-dimensional design drawing A of an opened state of an air microorganism sampler sampling head air inlet end eccentric shaft structure closing device in actual design. In fig. 10, 8 is an inlet column port of the sampling head, 10 is a driving motor, 13 is a closing cap, and 19 is a base of the closing cap of the eccentric shaft structure of the sampling head of the air microorganism sampler.
Fig. 11 is a three-dimensional design drawing B of an opened state of an air microorganism sampler sampling head air inlet end eccentric shaft structure closing device in actual design. In fig. 11, 8 is an inlet column port of the sampling head, 10 is a driving motor, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the sampling head of the air microorganism sampler.
Fig. 12 is a three-dimensional design drawing C of an opened state of an air microorganism sampler sampling head air inlet end eccentric shaft structure closing device, in fig. 12, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the air microorganism sampler sampling head.
Fig. 13 is a three-dimensional design drawing D of an opened state of an eccentric shaft structure closing device of an air microorganism sampler sampling head air inlet end in actual design, in fig. 13, 10 is a driving motor, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the air microorganism sampler sampling head.
FIG. 14 is a basic construction diagram of a six-stage impact type air microorganism sampler with an air microorganism sampler sampling head air inlet eccentric shaft structure closing device. In fig. 14, 1 is a 1-stage sampling disk of a sampling head, 2 is a 2-stage sampling disk of a sampling head, 3 is a 3-stage sampling disk of a sampling head, 4 is a 4-stage sampling disk of a sampling head, 5 is a 5-stage sampling disk of a sampling head, 6 is a 6-stage sampling disk of a sampling head, 7 is a top cover of a sampling head, 8 is an air inlet port on the top cover of a sampling head, a is a manual closing cap of the air inlet port of a sampling head, B is an air pump, C is a gas flow meter (device), D is an air extraction pipe, E is a shock pad of an air pump, F is an air outlet port of a sampling head, G is an air outlet port of an air pump, and H is a controller of an air microorganism sampler. W is a closing device (opening state) of an eccentric shaft structure of the air microorganism sampler sampling head air inlet end. Arrows in the figure indicate the flow direction of the gas.
Fig. 15 is a schematic diagram of the architecture of an air microorganism sampler with five sampling heads. In fig. 15, S1, S2, S3, S4, S5 respectively represent 5 sampling heads, J1, J2, J3, J4, J5 respectively represent air solenoid valves for opening and closing air gas pipelines, D is an air extraction pipeline, dots on the air extraction pipeline represent pipeline joints for communication, and H represents a controller of the air microorganism sampler. Arrows in the figure indicate the flow direction of the gas.
Detailed Description
The invention will now be further described in connection with examples or embodiments, which are, obviously, only intended to be illustrative and not limiting in any way.
The embodiment is an actual design case of an air microorganism sampler sampling head air inlet end eccentric shaft structure sealing device.
Fig. 10 shows a three-dimensional design drawing a of an opened state of an eccentric shaft structure closing device of an air microorganism sampler sampling head in actual design, in fig. 10, 8 is an inlet column port of the sampling head, 10 is a driving motor, 13 is a closing cover, and 19 is a base of the closing cover of the eccentric shaft structure of the air microorganism sampler sampling head. Fig. 11 is a three-dimensional design drawing B of an opened state of an air microorganism sampler sampling head air inlet end eccentric shaft structure closing device, in fig. 11, 8 is an air inlet column port of the sampling head, 10 is a driving motor, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the air microorganism sampler sampling head. Fig. 12 is a three-dimensional design drawing C of an opened state of an air microorganism sampler sampling head air inlet end eccentric shaft structure closing device, in fig. 12, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the air microorganism sampler sampling head. Fig. 13 is a three-dimensional design drawing D of an opened state of a closing device of an eccentric shaft structure of an air intake end of a sampling head of an air microorganism sampler actually designed, in fig. 13, 10 is a driving motor, 13 is a closing cap, 18 is an eccentric shaft, and 19 is a base of the closing cap of the eccentric shaft structure of the sampling head of the air microorganism sampler.
FIG. 14 is a basic construction diagram of a six-stage impact type air microorganism sampler with an air microorganism sampler sampling head air inlet eccentric shaft structure closing device. In fig. 14, 1 is a 1-stage sampling disk of a sampling head, 2 is a 2-stage sampling disk of a sampling head, 3 is a 3-stage sampling disk of a sampling head, 4 is a 4-stage sampling disk of a sampling head, 5 is a 5-stage sampling disk of a sampling head, 6 is a 6-stage sampling disk of a sampling head, 7 is a top cover of a sampling head, 8 is an air inlet port on the top cover of a sampling head, a is a manual closing cap of the air inlet port of a sampling head, B is an air pump, C is a gas flow meter (device), D is an air extraction pipe, E is a shock pad of an air pump, F is an air outlet port of a sampling head, G is an air outlet port of an air pump, and H is a controller of an air microorganism sampler. W is a closing device (opening state) of an eccentric shaft structure of the air microorganism sampler sampling head air inlet end. Arrows in the figure indicate the flow direction of the gas.
The same air microorganism sampler shown in fig. 10, 11, 12 and 13 is adopted to use the actual detection results of two times of disinfection in the same conference room sequentially by using the sampling head air inlet end sealing device and the sampling head air inlet end sealing device, the matched disinfection equipment is a xenon excimer active oxygen cluster indoor disinfection purifier, the sampling time is 15min, and specific test data are shown in the following table.
| CFU/sampling time after incubation | CFU value at 0 | 30minCFU value | 60minCFU value |
| Air inlet end sealing device without matched sampling head | 639/m 3 | 109/m 3 | 185/m 3 |
| Air inlet end sealing device of matched sampling head | 584 pieces/m 3 | 43/m 3 | 7/m 3 |
As can be seen from the actual test data of the above table, in the case that the CFU is very close at 0, the CFU data of the air microorganism sampler without using the sampling head air inlet end sealing device is significantly higher than the CFU data of the air microorganism sampler with using the sampling head air inlet end sealing device, and especially the 60minCFU data of the air microorganism sampler without the matching sampling head air inlet end sealing device is higher than the 30minCFU data. The analysis is that when the air microorganism sampler without the matched sampling head air inlet end sealing device is used for sampling for 30min and 60min, as personnel must enter a sterilized room and personnel must stay in the sterilized room within the sampling time (generally between 5min and 15 min), new microorganisms are caused to destroy the actual sterilizing effect of the sterilizer due to the fact that the personnel enter and leave and stay in the sterilized room, and therefore, the sampled sample is not the sample capable of representing the sterilizing effect, but the sample of the sterilizing effect after the new pollution is caused to the environment by the entering and leave and stay of the personnel, and the sample of the actual sterilizing effect after the matched sampling head air inlet end sealing device is not used for sampling the real sterilizing effect after the personnel enter and leave and stay in the sterilized room. Therefore, the technical defects of the existing air microorganism sampler can be fully displayed, the technical advancement of the air microorganism sampler with the sampling head air inlet end sealing device adopting the design scheme of the invention is embodied, and the sampling accuracy is ensured while the labor intensity of personnel is reduced.
Claims (6)
1. The design scheme of the air microorganism sampler sampling head air inlet end sealing device is characterized in that an air inlet port of a sampling head of the air microorganism sampler is designed into a sealing device which is fixed on the air inlet port of the sampling head and can realize sealing or opening of the air inlet port of the sampling head, a sealing cover on the sealing device opens the air inlet port of the sampling head of the air microorganism sampler under the control of a controller of the air microorganism sampler when sampling starts, and a sealing cover on the sealing device seals the air inlet port of the sampling head of the air microorganism sampler when sampling ends, so that the automatic opening and sealing of the air inlet port of the sampling head of the air microorganism sampler in a sampling link are realized, the controller of the air microorganism sampler has the functions of delay time control or preset time control on the sealing cover on the sealing device, wherein the design scheme of the air inlet end sealing device has three basic structures, one is a portal frame structure, the other is an eccentric shaft structure.
2. The design scheme of the air microorganism sampler sampling head air inlet end sealing device is characterized in that a basic component of the air microorganism sampler sampling head air inlet end portal frame structure sealing device consists of a base, a driving motor, a screw rod upright post, a sliding rod upright post and a sealing cover, wherein the sealing cover is provided with two holes, one hole is provided with an internal thread and is matched with the screw rod upright post, the other hole is provided with no internal thread and is matched with the sliding rod upright post, the driving motor is controlled by a controller of the air microorganism sampler to realize clockwise or anticlockwise rotation and drive the screw rod upright post to rotate clockwise or anticlockwise, so that the sealing cover is driven to move up and down along the screw rod upright post and the sliding rod upright post, and the sealing and opening of the air microorganism sampler sampling head air inlet end are realized.
3. The design scheme of the air microorganism sampler sampling head air inlet end sealing device is characterized in that basic components of the air microorganism sampler sampling head air inlet end eccentric shaft structure sealing device are composed of a base, a driving motor and a sealing cover, the eccentric shaft is fastened with one side of the sealing cover into a whole and is coupled with a rotating shaft of the driving motor, and the driving motor is controlled by a controller of the air microorganism sampler to rotate clockwise or anticlockwise so as to drive the sealing cover to rotate clockwise and anticlockwise by taking the eccentric shaft as a radius center, so that the air microorganism sampler sampling head air inlet end is sealed and opened.
4. The design scheme of the air microorganism sampler sampling head air inlet end sealing device is characterized in that a basic component of the air microorganism sampler sampling head air inlet end eccentric wheel structure sealing device is composed of a base, a driving motor and a sealing cover, a central asymmetric eccentric wheel, the outer edge of the big head of the eccentric wheel is closely contacted with a protruding part on one side of the sealing cover, an axle center hole of the eccentric wheel is coupled with a rotating shaft of the driving motor, the driving motor realizes clockwise or anticlockwise rotation under the control of a controller of the air microorganism sampler, the eccentric wheel is driven to swing up and down by taking the axle center hole of the eccentric wheel as the center, and the opening and the closing of the sampling head air inlet sealing cover are driven by the self gravity of the sealing cover and the tension of a tensioning spring, so that the sealing and the opening of the air microorganism sampler sampling head air inlet end are realized.
5. The design scheme of the air microorganism sampler sampling head air inlet end sealing device is characterized in that a miniature stepping motor is adopted as a driving motor of the sampling head air inlet end portal frame structure sealing device, and a miniature worm gear motor is adopted as a driving motor of the sampling head air inlet end eccentric shaft frame structure sealing device.
6. The design scheme of the air microorganism sampler sampling head air inlet end sealing device according to claim 1 is characterized in that an air pump is connected with a plurality of sampling heads through an air pipeline and an air pipeline electromagnetic valve, and the air microorganism multi-way sampler with the plurality of sampling heads can be used for collecting simultaneously or sequentially.
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| CN202311588830.6A CN117586862A (en) | 2023-11-17 | 2023-11-17 | Design scheme of air microorganism sampler sampling head air inlet end sealing device |
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| CN202311588830.6A CN117586862A (en) | 2023-11-17 | 2023-11-17 | Design scheme of air microorganism sampler sampling head air inlet end sealing device |
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| CN202311588830.6A Pending CN117586862A (en) | 2023-11-17 | 2023-11-17 | Design scheme of air microorganism sampler sampling head air inlet end sealing device |
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