Handheld laser dust particle counter with gas buffer structure

Abstract

The utility model discloses a handheld laser dust particle counter with a gas buffer structure, which relates to the technical field of laser dust particle counters and comprises a main body, the main body comprises a touch screen positioned at the front end, a handle is arranged below the touch screen, a rear cover is mounted at the rear end of the main body, and the gas buffer structure is mounted on the rear cover. A pressure adjusting assembly used for adjusting air pressure is installed in the rear cover, the exhaust end of the pressure adjusting assembly is connected with a detection assembly through a pipeline, a back flushing assembly is connected between the detection assembly and the pressure adjusting assembly through a pipeline and comprises an air pump, and a pump body air outlet pipe and a pump body air inlet pipe are installed at the two ends of the air pump respectively. The laser dust particle counter solves the problems that when an existing laser dust particle counter is used, gas needs to be guided into a cavity for detection, dust particles in the gas are prone to blocking a pipeline along with the prolonging of service time, and consequently the follow-up detection accuracy is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser dust particle counter technical field, concretely is a kind of hand-held laser dust particle counter with gas buffer structure. BACKGROUND

[0002] Laser dust particle counter is used to measure the number of dust particles in gas in different environments, and its basic principle is that the probe laser of optical sensor is scattered by dust particles and received by photosensitive element to generate pulse signal, the pulse signal is output and amplified, and then digital signal processing is carried out;

[0003] Publication No.: CN212514154U, named "a laser dust particle counter with gas buffer device", including hand-held laser dust particle counter, the outer surface of hand-held laser dust particle counter is provided with data display screen, the lower portion of data display screen is provided with power switch.The laser dust particle counter, sampling operation under normal pressure gas is driven by hydraulic rod and moves downward the piston plate piece inside buffer valve cavity, so that gas is drawn into gas pressure buffer tank, and sampling operation under high pressure gas does not need to be assisted by the movement of hydraulic rod, after valve plate is opened, high pressure gas is automatically entered into gas pressure buffer tank under the influence of pressure difference, after high pressure gas enters into the inside of buffer valve cavity, piston plate piece is pushed downward, when piston plate piece reaches bottom, because the volume of high pressure gas under the same quality is less than the volume of normal pressure gas, in the same space, the pressure will drop to recover to the pressure value of normal pressure gas.

[0004] The above-mentioned existing laser dust particle counter needs to guide gas into the cavity for detection when in use, and with the extension of use time, dust particles in gas are easy to block pipeline, resulting in the decrease of subsequent detection accuracy;Therefore, it does not meet the existing demand, and a hand-held laser dust particle counter with gas buffer structure is proposed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of hand-held laser dust particle counter with gas buffer structure to solve the problems of existing laser dust particle counter in use in the above background art, need to guide gas into the cavity for detection, and with the extension of use time, dust particles in gas are easy to block pipeline, resulting in the decrease of subsequent detection accuracy.

[0006] To achieve the above object, the utility model provides the following technical scheme: A hand -held laser dust particle counter with gas buffer structure, include: main body, the main body includes the touch screen at the front end, the below of touch screen is provided with handle, the rear end of main body is installed with back cover, the inside installation of back cover has pressure regulating component for adjusting air pressure, the exhaust end of pressure regulating component is connected with detection component through pipeline, detection component and pressure regulating component are connected with backflush component through pipeline, backflush component includes air pump, the both ends of air pump are installed with pump body air outlet pipe and pump body air inlet pipe respectively.

[0007] Preferably, one end of the pump body air outlet pipe is provided with a three-way pipe, and a third control valve is installed on the outer wall of the pump body air outlet pipe.

[0008] Preferably, the pressure regulating component includes a pressure regulating valve, and a pressure regulating inlet pipe and a pressure regulating outlet pipe are respectively installed at the two ends of the pressure regulating valve.

[0009] Preferably, the detection component includes a laser particle counting sensor, one end of the laser particle counting sensor is provided with a sensor air inlet pipe, a second control valve is installed on the outer wall of the sensor air inlet pipe, and one end of the sensor air inlet pipe is connected with the pressure regulating outlet pipe through a three-way pipe.

[0010] Preferably, the other end of the laser particle counting sensor is connected with a fan through a pipeline, and a fan exhaust port is installed at one end of the fan through a pipeline.

[0011] Preferably, a sealing element is installed inside the pressure regulating inlet, the fan exhaust port and the pump body air inlet.

[0012] Preferably, the sealing element includes a plug, and a handle is installed on the end face of the plug.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1), in the utility model, the pressure regulating component is used to adjust the air pressure, the detection component is used to count the dust particles in the adjusted gas, after a period of use, the backflush component is used to backflush the pipe, when backflushing, the air pump sends the gas into the pipe through the pump body air outlet pipe, closes the first control valve, makes the gas enter the sensor air inlet pipe through the second control valve, backflushes the place, removes the impurities from the fan exhaust port, after completion, closes the second control valve, opens the first control valve, backflushes the pressure regulating pipeline through the gas, removes the impurities in the pipeline, avoids the blockage of the internal pipeline, and affects the collection amount and detection accuracy.

[0015] (2), The utility model discloses, pressure regulating valve is used to play the effect that adjusts gas pressure, and it can provide a buffer process for high pressure gas in the process that laser dust particle counter carries out sampling to high pressure gas, makes laser dust particle counter can obtain steady sampling flow, that is, gas buffer structure, under the structure, carry out gas in and out operation through pressure regulating inlet pipe and pressure regulating outlet pipe, the opening and closing state of pressure regulating outlet pipe is controlled through first control valve, when operating, fan draws gas and enters from pressure regulating air inlet, then adjusts gas pressure through pressure regulating valve, after pressure regulating, pressure regulating outlet pipe is sent into tee bend pipe, and the detection is carried out in laser particle counting sensor through sensor inlet pipe and is sent into tee bend pipe place, realizes to different pressure gas and carries out pressure regulating, and carries out the effect that laser dust particle count is carried out to the gas after pressure regulating. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall front view of the utility model;

[0017] Figure 2 It is the overall rear view of the utility model;

[0018] Figure 3 It is the main body internal structure schematic view of the utility model;

[0019] Figure 4 It is the sealing piece structure schematic view of the utility model;

[0020] In the drawing: 1, main body;101, touch screen;102, handle;103, back cover;2, pressure regulating assembly;201, pressure regulating valve;202, pressure regulating inlet pipe;203, pressure regulating air inlet;204, pressure regulating outlet pipe;205, first control valve;3, detection assembly;301, laser particle counting sensor;302, sensor inlet pipe;303, second control valve;304, fan;305, fan exhaust port;4, backflush assembly;401, air pump;402, tee bend pipe;403, third control valve;404, pump body outlet pipe;405, pump body inlet pipe;406, pump body air inlet;5, sealing piece;501, plug cover;502, handle. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Please refer to Figures 1-4The utility model provides an embodiment: a handheld laser dust particle counter with gas buffer structure, include: main body 1, main body 1 includes the touch screen 101 at the front end, be provided with handle 102 under touch screen 101, the rear end of main body 1 is installed with back cover 103, the inside installation of back cover 103 is used for the pressure regulating assembly 2 for adjusting air pressure, the exhaust end of pressure regulating assembly 2 is connected with detection assembly 3 through pipeline, detection assembly 3 and pressure regulating assembly 2 are connected with backflush assembly 4 through pipeline, backflush assembly 4 includes air pump 401, and the both ends of air pump 401 are installed pump body outlet pipe 404 and pump body inlet pipe 405 respectively, and one end of pump body outlet pipe 404 is installed with three -way pipe 402, and third control valve 403 is installed on the outer wall of pump body outlet pipe 404, and one end of pump body inlet pipe 405 is installed with pump body air inlet 406;

[0023] Through pressure regulating assembly 2 adjust air pressure, detection assembly 3 carries out counting operation to the dust particle of pressure-regulated gas, after using for a period of time, through backflush assembly 4 carries out backflush to the pipe, when backflush, air pump 401 sends gas into through pump body outlet pipe 404, closes first control valve 205, makes gas enter sensor inlet pipe 302 along second control valve 303, carries out backflush to this place, removes impurity from fan exhaust port 305, after finishing, closes second control valve 303, opens first control valve 205, carries out backflush operation to pressure regulating pipeline through gas, removes the effect of impurity in pipeline, avoids internal pipeline blockage and affects the collection and detection accuracy, when dust particle detection, close pump body outlet pipe 404 at third control valve 403, so that gas does not move to air pump 401.

[0024] Specifically, pressure regulating assembly 2 includes pressure regulating valve 201, and pressure regulating valve 201 is ASICKO's ARM5-06 model, and the both ends of pressure regulating valve 201 are installed with pressure regulating inlet pipe 202 and pressure regulating outlet pipe 204 respectively, and one end of pressure regulating inlet pipe 202 is provided with pressure regulating air inlet 203, and first control valve 205 is installed on the outer wall of pressure regulating outlet pipe 204;Detection assembly 3 includes laser particle counting sensor 301, and the model is PM5100 of four square photoelectricity, and one end of laser particle counting sensor 301 is installed with sensor inlet pipe 302, and second control valve 303 is installed on the outer wall of sensor inlet pipe 302, and one end of sensor inlet pipe 302 is connected with pressure regulating outlet pipe 204 through three -way pipe 402, and one end of laser particle counting sensor 301 is connected with fan 304 through pipeline;

[0025] The pressure regulating valve 201 is used to adjust the pressure of the gas, and can provide a buffering process for the high-pressure gas during the sampling of the laser dust particle counter, so that the laser dust particle counter can obtain a smooth sampling flow, that is, a gas buffering structure, under which the gas is in and out through the pressure regulating inlet pipe 202 and the pressure regulating outlet pipe 204, and the opening and closing state of the pressure regulating outlet pipe 204 is controlled by the first control valve 205; in operation, the fan 304 draws the gas from the pressure regulating inlet 203, and then adjusts the pressure of the gas through the pressure regulating valve 201; after pressure regulation, the pressure regulating outlet pipe 204 sends the gas to the three-way pipe 402, and the three-way pipe 402 sends the gas to the laser particle counting sensor 301 through the sensor inlet pipe 302; the detection laser of the optical sensor is received by the photosensitive element after being scattered by the dust particles, and a pulse signal is generated; the pulse signal is output and amplified, and then digital signal processing is performed to obtain the number of dust particles in the gas; then, the gas is discharged from the fan exhaust port 305 to realize detection.

[0026] Further, the pressure regulating inlet 203, the fan exhaust port 305 and the pump body inlet 406 are each provided with a sealing element 5, which includes a plug 501 and a handle 502 provided on the end face of the plug 501; the sealing element 5 seals the gas inlets and outlets when not in use, so that impurities cannot enter the internal pipeline during storage; specifically, the plug 501 is inserted into the gas inlet channel, and the plug 501 is pulled out by the handle 502 for subsequent removal, which is convenient for users.

[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A handheld laser dust particle counter with a gas buffer structure, comprising a main body (1), the main body (1) including a touch screen (101) located at the front end, a handle (102) disposed below the touch screen (101), and a back cover (103) installed at the rear end of the main body (1), characterized in that: The back cover (103) is equipped with a pressure regulating component (2) for adjusting air pressure. The exhaust end of the pressure regulating component (2) is connected to a detection component (3) through a pipeline. The detection component (3) and the pressure regulating component (2) are connected to a backflushing component (4) through a pipeline. The backflushing component (4) includes an air pump (401). The two ends of the air pump (401) are respectively equipped with a pump body outlet pipe (404) and a pump body inlet pipe (405).

2. A handheld laser dust particle counter with a gas buffer structure according to claim 1, characterized in that: A three-way pipe (402) is installed at one end of the pump body outlet pipe (404), a third control valve (403) is installed on the outer wall of the pump body outlet pipe (404), and a pump body air inlet (406) is installed at one end of the pump body inlet pipe (405).

3. A handheld laser dust particle counter with a gas buffer structure according to claim 2, characterized in that: The pressure regulating assembly (2) includes a pressure regulating valve (201), with a pressure regulating inlet pipe (202) and a pressure regulating outlet pipe (204) installed at both ends of the pressure regulating valve (201). A pressure regulating inlet port (203) is provided at one end of the pressure regulating inlet pipe (202), and a first control valve (205) is installed on the outer wall of the pressure regulating outlet pipe (204).

4. A handheld laser dust particle counter with a gas buffer structure according to claim 3, characterized in that: The detection component (3) includes a laser particle counting sensor (301), one end of which is equipped with a sensor inlet pipe (302). A second control valve (303) is installed on the outer wall of the sensor inlet pipe (302), and one end of the sensor inlet pipe (302) is connected to a pressure regulating outlet pipe (204) through a three-way pipe (402).

5. A handheld laser dust particle counter with a gas buffer structure according to claim 4, characterized in that: The other end of the laser particle counting sensor (301) is connected to a fan (304) via a pipe, and one end of the fan (304) is equipped with a fan exhaust port (305) via a pipe.

6. A handheld laser dust particle counter with a gas buffer structure according to claim 5, characterized in that: The pressure regulating air inlet (203), the fan exhaust port (305), and the pump body air inlet (406) are all equipped with sealing elements (5).

7. A handheld laser dust particle counter with a gas buffer structure according to claim 6, characterized in that: The seal (5) includes a plug (501) with a handle (502) mounted on its end face.

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