CN113063638A

CN113063638A - Air quality detection device and detection method capable of improving measurement precision

Info

Publication number: CN113063638A
Application number: CN202110259856.0A
Authority: CN
Inventors: 冯程鑫; 王体宸; 艾勇
Original assignee: Hubei Keji Environmental Testing Co ltd
Current assignee: Hubei Keji Environmental Testing Co ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-07-02

Abstract

The invention relates to the technical field of air quality detection, in particular to an air quality detection device and a detection method capable of improving measurement accuracy. The air-bleed detection device comprises an air-bleed detection device and a reciprocating motion device arranged at the tail end of the air-bleed detection device, wherein the air-bleed detection device comprises an air-bleed cylinder, the air-bleed cylinder is of a cylindrical structure, a through groove is formed in the rear of the air-bleed cylinder, an air inlet pipe and an exhaust pipe are arranged in front of the air-bleed cylinder, a connecting plate is arranged behind a connecting piston and is of a U-shaped structure, a movable piston is arranged in front of the connecting piston, a threaded hole is formed in the center of the connecting piston, a movable lead screw is arranged behind the movable piston, a rotating shaft is arranged in front of the movable lead screw, the rotating shaft of the movable lead screw is rotatably connected onto the movable piston, the movable piston is in threaded connection with the.

Description

Air quality detection device and detection method capable of improving measurement precision

Technical Field

The invention relates to the technical field of air quality detection, in particular to an air quality detection device and a detection method capable of improving measurement accuracy.

Background

The air quality detection means detecting the quality of air, wherein the quality of air reflects the concentration of pollutants in the air, and air pollution is a complex phenomenon and is influenced by a plurality of factors at a specific time and place. The air in nature needs to be sucked and then sent into the detection device for detection during detection, the air is sucked by an air extractor in a commonly used air suction mode at present, the air collected in one end time is detected after the flow is stable through a flow valve, and the air suction mode needs to suck a large amount of external air before the flow is stable, so that the content of pollutants in the air is easy to change during real detection, and a large measurement error exists.

Disclosure of Invention

The present invention is directed to an air quality detection apparatus and a detection method capable of improving measurement accuracy, so as to solve the problems in the background art.

In order to achieve the above object, one of the objects of the present invention is to provide an air quality detection device capable of improving measurement accuracy, comprising an air extraction detection device and a reciprocating device installed at the tail end of the air extraction detection device, wherein the air extraction detection device comprises an air extraction cylinder, the air extraction cylinder is in a cylindrical structure, a through groove is arranged at the rear of the air extraction cylinder, an air inlet pipe and an air outlet pipe are arranged in front of the air extraction cylinder, check valves with opposite working directions are arranged on the air inlet pipe and the air outlet pipe, a valve is arranged in front of the air inlet pipe, a filter screen is arranged at one end of the valve, when the valve is closed, external air can be prevented from entering the air extraction cylinder, the device can be prevented from being blocked by large sundries through the filter screen, a connecting piston is arranged in the air extraction cylinder, the size of the connecting, the connecting plate is U type structure, the place ahead of connecting the piston is equipped with movable piston, the central authorities of connecting the piston are equipped with the screw hole, the movable piston rear is equipped with movable lead screw, movable lead screw the place ahead is equipped with the pivot, movable lead screw's pivot is rotated to be connected on the movable piston, movable piston threaded connection be in the screw hole, the pump cylinder is equipped with the detector outward, the valve passes through the pipe connection on the detector, and the detector preferably adopts air quality detector, like known by technical personnel in the field, through its inside original dress import sensor, can the accurate pollutant concentration that measures to calculate air quality index AQI, report to the police when concentration exceeds standard. The air quality detector is based on the principle that signals of a front-end formaldehyde sensor, a PM2.5 sensor, a TVOC sensor and a temperature and humidity sensor are detected, weak signals of the sensors are amplified through an operational amplifier, noise interference is removed through a filter circuit, then the signals are acquired through AD (analog-to-digital) and are processed and calculated by a 32-bit high-precision CPU (central processing unit), and then the signals are converted into pollutant concentration values and displayed on a liquid crystal screen.

When the air extraction detection device of the embodiment is used, when the connecting piston and the movable piston move backwards, the inner space of the air extraction cylinder is increased to generate negative pressure, so that outside air is absorbed through the air inlet pipe, because the air inlet pipe and the air exhaust pipe are respectively provided with the one-way valves with opposite working directions, the air exhaust pipe is in a closed state when the air inlet pipe absorbs air, when the connecting piston and the movable piston move reversely, the air inlet pipe is in a closed state, absorbed air can be sent into the detector through the air exhaust pipe, the air is detected and analyzed through the detector, in order to obtain higher precision, multiple times of measurement are needed, at the moment, the movable piston can move through rotating the movable screw rod, when air is detected, the air quantity sent into the detector to be detected can be adjusted through slowly moving the movable piston, so that the air quantity is ensured, therefore, the error in detection is reduced, and the measurement precision is improved.

As a further improvement of the technical scheme, a fixing rod is arranged below the air pump, a plurality of bases are arranged below the air pump, a fixing base is arranged on the base, a plurality of jacks are arranged on the fixing base, the bases are inserted into the jacks on the fixing base, and a plurality of support columns are arranged below the bases.

As a further improvement of this technical scheme, reciprocating motion device includes the fixed block, the fixed block is connected the connecting plate rear, the fixed block below is equipped with the connecting block, the connecting block below is equipped with the connecting rod, connecting rod one end articulates the connecting block below, connecting rod other end both sides are equipped with a pair of straight board, interval between the straight board is greater than the thickness of connecting rod, the connecting rod rotates to be connected the top of straight board, straight board both sides are equipped with the axis of rotation, the axis of rotation both sides are equipped with the extension rod, the extension rod is fixed on the base, the axis of rotation rotates to be connected on the extension rod.

As a further improvement of the technical scheme, a rocker is arranged on the side face of the rotating shaft and is of a Z-shaped structure, a clamping block is arranged in front of the rocker, a clamping groove is formed in the rotating shaft, and the rotating shaft is in splicing fit with the clamping groove.

As a further improvement of the technical scheme, a moving block is arranged at the front end of the rocker, a round sleeve is sleeved outside the rocker, a moving groove is formed in the round sleeve, the moving block is connected in the moving groove in a sliding mode, an external thread is arranged on the rotating shaft, an internal thread is arranged in front of the round sleeve, and the round sleeve is in threaded connection with the rotating shaft.

As a further improvement of the technical scheme, a knob is arranged at the rear of the movable screw rod, a rotating rod is arranged at the rear of the knob, an indicating rod is arranged at the rear of the knob, a rotating hole is formed in the middle of the indicating rod and is rotatably connected to the rotating rod, a sliding groove is formed in the connecting plate, two ends of the indicating rod are slidably connected to the sliding groove, and scales are arranged on one side of the sliding groove.

As a further improvement of the technical scheme, a sliding groove is formed below the fixed block, a threaded rod is arranged above the connecting block, the sliding groove is matched with the connecting block in shape, the threaded rod penetrates through the top of the fixed block, a locking nut is connected to the threaded rod through threads above the threaded rod, a circular groove is formed in the fixed block, an adjusting screw rod is connected to the circular groove in a sliding mode, one end of the adjusting screw rod is connected with a clamping seat, and the clamping seat is fixedly connected to the side face of the connecting plate.

As a further improvement of the technical scheme, a threaded opening is formed in the center of the connecting block, the adjusting screw rod is in threaded connection with the threaded opening, a turntable is arranged at the tail end of the adjusting screw rod, the turntable of the connecting rod is rotatably connected in the clamping seat, and a screw cap is arranged in front of the adjusting screw rod.

As a further improvement of the technical scheme, a clamping plate is arranged in front of the clamping seat, a pair of fixing plates is fixed behind the connecting plates, a bolt is arranged in each fixing plate, and the bolt penetrates through the fixing plates and the clamping plate.

Another object of the present invention is to provide an air quality detecting method capable of improving measurement accuracy, including any one of the air quality detecting apparatuses capable of improving measurement accuracy, including the following steps:

s1, pulling the connecting plate outwards to drive the connecting piston and the movable piston connected to the connecting plate to move backwards, and air enters the air suction cylinder through the air inlet pipe;

s2, pushing the connecting plate, and enabling air sucked in the air suction cylinder to enter the detector through the exhaust pipe;

s3, the position of the movable piston can be adjusted by rotating the movable screw rod, so that the position of the movable piston is further finely adjusted, the gas in the suction cylinder is completely sent into the detector, and finally the detector starts to detect the air.

Compared with the prior art, the invention has the beneficial effects that:

1. in the air quality detection device and the detection method capable of improving the measurement precision, the movable piston is arranged, when multiple times of measurement are carried out, the movable piston can be moved by rotating the movable lead screw, and when air is detected, the air quantity detected in the detector can be adjusted by slowly moving the movable piston, so that the air quantity is the same when the multiple times of measurement are ensured, the error in detection is reduced, and the measurement precision is improved.

2. In the air quality detection device and the detection method capable of improving the measurement precision, the rotating shaft can drive the straight plate to rotate through the rotating shaft, so that the fixed block is driven to perform linear reciprocating motion through the connecting rod, meanwhile, the fixed block is connected to the side face of the connecting plate, the connecting piston and the movable piston can be driven to perform reciprocating motion, air suction action is completed, and the movable piston is convenient to move.

3. In the air quality detection device and the detection method capable of improving the measurement accuracy, the rotating shaft is more convenient to rotate through the arranged rocker, the rocker is prevented from being touched by mistake, so that the connecting piston and the movable piston are unnecessarily moved, the rocker can be detached in a plugging mode, and the air quality detection device and the detection method are more flexible and convenient.

4. In this air quality detection device and detection method that can improve measurement accuracy, through the fixed block that sets up, the position of slip fixed block then the position of locking nut to the fixed block on the rethread threaded rod is locked to change the effect length of connecting rod, when the distance of fixed block and connecting plate reduces, the fixed block will survive faster reciprocating motion speed under the condition that the rotational speed of axis of rotation is the same, thereby promote the speed when collecting gas.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a schematic view of a base structure according to embodiment 1;

FIG. 3 is a schematic view of the structure of the suction tube in embodiment 1;

FIG. 4 is a schematic view of the structure of a movable piston according to embodiment 1;

FIG. 5 is a schematic view of a fixing block structure according to embodiment 1;

FIG. 6 is a schematic structural view of a lead screw according to embodiment 1;

FIG. 7 is a schematic sectional view of a fixing block according to embodiment 1;

FIG. 8 is a schematic view showing a structure of a crank handle according to embodiment 1;

FIG. 9 is a schematic view of the structure of a fixing plate according to embodiment 1;

fig. 10 is a schematic structural diagram of the rocker in embodiment 1.

The various reference numbers in the figures mean:

100. an air extraction detection device;

110. a base; 111. a fixed seat; 112. a support pillar;

120. a detection device;

130. an air pumping cylinder; 131. fixing the rod; 132. penetrating a groove; 133. an air inlet pipe; 134. an exhaust pipe; 135. a valve; 136. filtering with a screen; 137. connecting a piston; 138. a connecting plate; 139. a threaded hole;

140. a movable piston; 141. a movable screw rod; 142. a knob; 143. a rotating rod; 144. an indication lever; 145. hole turning; 146. a chute;

200. a reciprocating device;

210. a fixed block; 211. a circular groove; 212. a sliding groove; 213. a card holder; 214. a connecting rod; 215. a straight plate; 216. a rotating shaft; 217. a card slot; 218. an extension pole;

220. a rocker; 221. a round sleeve; 222. a moving groove; 223. a moving block; 224. a clamping block;

230. connecting blocks; 231. a threaded opening; 232. a threaded rod;

240. adjusting the screw rod; 241. screwing the cap;

250. a fixing plate; 251. a bolt; 252. and (4) clamping the board.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1-10, an object of the present embodiment is to provide an air quality detecting device capable of improving measurement accuracy, which includes an air-extraction detecting device 100 and a reciprocating device 200 installed at the rear end of the air-extraction detecting device 100, the air-extraction detecting device 100 includes an air-extraction cylinder 130, the air-extraction cylinder 130 is a cylindrical structure, a through groove 132 is installed at the rear of the air-extraction cylinder 130, an air inlet pipe 133 and an air outlet pipe 134 are installed in front of the air-extraction cylinder 130, check valves with opposite working directions are installed on the air inlet pipe 133 and the air outlet pipe 134, a valve 135 is installed in front of the air inlet pipe 133, a filter screen 136 is installed at one end of the valve 135, when the valve 135 is closed, external air can be prevented from entering the air-extraction cylinder 130, the device can be prevented from being blocked by large debris by the filter screen 136, a connecting piston 137 is installed in the air-extraction, the connecting plate 138 is of a U-shaped structure, a movable piston 140 is arranged in front of the connecting piston 137, a threaded hole 139 is formed in the center of the connecting piston 137, a movable screw rod 141 is arranged behind the movable piston 140, a rotating shaft is arranged in front of the movable screw rod 141, the rotating shaft of the movable screw rod 141 is rotatably connected to the movable piston 140, the movable piston 140 is in threaded connection with the threaded hole 139, the detector 120 is arranged outside the air extraction cylinder 130, the valve 135 is connected to the detector 120 through a pipeline, the detector 120 preferably adopts an air quality detector, as known by persons skilled in the art, the concentration of pollutants can be accurately measured through an original inlet sensor arranged in the detector, the air quality index AQI is calculated, and an alarm is given. The air quality detector is based on the principle that signals of a front-end formaldehyde sensor, a PM2.5 sensor, a TVOC sensor and a temperature and humidity sensor are detected, weak signals of the sensors are amplified through an operational amplifier, noise interference is removed through a filter circuit, then the signals are acquired through AD (analog-to-digital) and are processed and calculated by a 32-bit high-precision CPU (central processing unit), and then the signals are converted into pollutant concentration values and displayed on a liquid crystal screen.

When the air-bleed detecting device 100 of this embodiment is used, when the connecting piston 137 and the movable piston 140 move backward, the internal space of the air-bleed cylinder 130 increases to generate a negative pressure, so as to absorb the external air through the air inlet pipe 133, because the air inlet pipe 133 and the air outlet pipe 134 are both provided with check valves with opposite working directions, the air outlet pipe 134 is in a closed state when the air inlet pipe 133 absorbs the air, when the connecting piston 137 and the movable piston 140 move backward, the air inlet pipe 133 is in a closed state, and the absorbed air is sent into the detecting instrument 120 through the air outlet pipe 134, the air is detected and analyzed by the detecting instrument 120, in order to obtain a high precision, multiple measurements are required, at this time, the movable piston 140 can move by rotating the movable screw rod 141, and when the air is detected, the amount of air sent into the detecting instrument 120 can be adjusted by, therefore, the air quantity is the same when the air quantity is measured for multiple times, the error during detection is reduced, and the measurement precision is improved.

Further, for convenience of fixing the air pumping cylinder 130, an operator can conveniently pump the connecting piston 137 and the movable piston 140, a fixing rod 131 is arranged below the air pumping cylinder 130, a plurality of bases 110 are arranged below the air pumping cylinder 130, a fixing base 111 is arranged on the base 110, a plurality of jacks are arranged on the fixing base 111, the base 110 is inserted into the jacks on the fixing base 111, a plurality of support columns 112 are arranged below the base 110, the air pumping cylinder 130 is fixed through the jacks of the fixing base 111 and the insertion effect of the fixing rod 131, and the operator can conveniently pump the connecting piston 137 and the movable piston 140.

Still further, in order to facilitate the connecting piston 137 and the movable piston 140 to reciprocate in the suction tube 130, the reciprocating device 200 includes a fixed block 210, the fixed block 210 is connected to the rear of the connecting plate 138, a connecting block 230 is arranged below the fixed block 210, a connecting rod 214 is arranged below the connecting block 230, one end of the connecting rod 214 is hinged below the connecting block 230, a pair of straight plates 215 are arranged on two sides of the other end of the connecting rod 214, the interval between the straight plates 215 is larger than the thickness of the connecting rod 214, the connecting rod 214 is rotatably connected above the straight plates 215, rotating shafts 216 are arranged on two sides of the straight plates 215, extension rods 218 are arranged on two sides of the rotating shafts 216, the extension rods 218 are fixed on the base 110, the rotating shafts 216 are rotatably connected to the extension rods 218, the straight plates 215 can be driven to rotate by rotating the rotating shafts 216, the connecting piston 137 and the movable piston 140 can be driven to reciprocate, and the air suction action is completed.

Specifically, for the convenience of rotating axis 216, axis of rotation 216 side is equipped with rocker 220, rocker 220 is Z type structure, the place ahead of rocker 220 is equipped with fixture block 224, draw-in groove 217 has been seted up in axis of rotation 216, axis of rotation 216 and draw-in groove 217 grafting cooperation, it is more convenient to make through rocker 220 to rotate axis of rotation 216, it is equipped with the handle that makes things convenient for the gripping as preferred rocker 220 end, the handle rotates to be connected at rocker 220 is terminal, the surface is equipped with the anti-skidding line that prevents to skid simultaneously, thereby it makes connecting piston 137 and movable piston 140 take place unnecessary and remove to touch rocker 220 in order to prevent the mistake simultaneously, can dismantle rocker 220 through the mode of pegging graft.

In addition, in order to prevent that the rocker 220 of activity grafting from dropping when rotating, the front end of rocker 220 is equipped with movable block 223, rocker 220 overcoat is equipped with circle cover 221, be equipped with shifting chute 222 in the circle cover 221, movable block 223 sliding connection is in shifting chute 222, be equipped with the external screw thread on the axis of rotation 216, circle cover 221 the place ahead is equipped with the internal thread, circle cover 221 and axis of rotation 216 threaded connection, can be so that circle cover 221 and axis of rotation 216 threaded connection through sliding and rotation circle cover 221, thereby further fixed rocker 220 and axis of rotation 216, and then prevent that rocker 220 from dropping when rotating.

Besides, in order to adjust the position of the movable piston 140 more accurately, a knob 142 is arranged behind the movable screw rod 141, a rotating rod 143 is arranged behind the knob 142, an indicating rod 144 is arranged behind the knob 142, a rotating hole 145 is arranged in the middle of the indicating rod 144, the rotating hole 145 is rotatably connected to the rotating rod 143, a sliding groove 146 is formed in the connecting plate 138, two ends of the indicating rod 144 are slidably connected in the sliding groove 146, scales are arranged on one side of the sliding groove 146, when the movable screw rod 141 rotates and moves, the indicating rod 144 slidably connected in the sliding groove 146 can generate the same displacement through the rotating connection with the rotating rod 143, and further the position of the movable piston 140 can be accurately indicated through the scales on the connecting plate 138, so that the exhaust amount can be more accurately grasped.

Further, in order to facilitate the adjustment of the moving speed of the connecting piston 137 and the movable piston 140 to increase the speed of collecting a large amount of gas, a sliding groove 212 is formed below the fixed block 210, a threaded rod 232 is arranged above the connecting block 230, the shape of the sliding groove 212 is matched with that of the connecting block 230, the threaded rod 232 passes through the upper part of the fixed block 210, a locking nut is in threaded connection with the upper part of the threaded rod 232, a circular groove 211 is formed in the fixed block 210, an adjusting screw 240 is in sliding connection with the circular groove 211, one end of the adjusting screw 240 is connected with a clamping seat 213, the clamping seat 213 is fixedly connected to the side surface of the connecting plate 138, the position of the fixed block 210 is locked by the locking nut on the threaded rod 232 through the position of the sliding fixed block 210, so that the acting length of the connecting rod 214 is changed, when the distance between the fixed block, thereby increasing the velocity at which the gas is collected.

Still further, in order to facilitate the rapid adjustment of the position of the fixing block 210, a threaded hole 231 is formed in the center of the connecting block 230, the adjusting screw 240 is in threaded connection with the threaded hole 231, a rotating disc is arranged at the tail end of the adjusting screw 240, the rotating disc of the connecting rod 214 is rotatably connected in the clamping seat 213, a screw cap 241 is arranged in front of the adjusting screw 240, the threaded hole 231 can be driven to slide in the circular groove 211 by rotating the adjusting screw 240 through the threaded connection of the adjusting screw 240 and the threaded hole 231, so that the distance between the hinge point of the connecting rod 214 and the connecting block 230 and the connecting plate 138 is changed, and the purpose of rapid adjustment is achieved, preferably, a torsion bar which facilitates the rotation of the screw cap 241 is arranged.

Specifically, in order to conveniently detach and mount the air suction detection device 100 and the reciprocating device 200, a clamping plate 252 is arranged in front of the clamping seat 213, a pair of fixing plates 250 is fixed behind the connecting plate 138, a bolt 251 is arranged in each fixing plate 250, the bolt 251 penetrates through the fixing plates 250 and the clamping plate 252, the air suction detection device 100 and the reciprocating device 200 are connected in a mode that the bolt 251 penetrates through the fixing plates 250 and the clamping plate 252, and detachment and mounting are facilitated.

Another object of the present invention is to provide an air quality detecting method capable of improving measurement accuracy, including any one of the above air quality detecting apparatuses capable of improving measurement accuracy, including the following steps:

s1, pulling the connecting plate 138 outwards to drive the connecting piston 137 and the movable piston 140 connected to the connecting plate 138 to move backwards, and air enters the air extraction cylinder 130 through the air inlet pipe 133;

s2, pushing the connecting plate 138, wherein air sucked in the air suction cylinder 130 enters the detector 120 through the exhaust pipe 134;

s3, the position of the movable piston 140 can be adjusted by rotating the movable screw rod 141, so that the position of the movable piston 140 is further finely adjusted, the gas in the suction cylinder 130 is completely sent into the detector 120, and finally the detector 120 starts to detect the air.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a can improve measurement accuracy's air quality detection device which characterized in that: the air suction detection device comprises an air suction detection device (100) and a reciprocating motion device (200) arranged at the tail end of the air suction detection device (100), wherein the air suction detection device (100) comprises an air suction cylinder (130), the air suction cylinder (130) is of a cylindrical structure, a through groove (132) is formed in the rear of the air suction cylinder (130), an air inlet pipe (133) and an air outlet pipe (134) are arranged in front of the air suction cylinder (130), one-way valves with opposite working directions are arranged on the air inlet pipe (133) and the air outlet pipe (134), a valve (135) is arranged in front of the air inlet pipe (133), a filter screen (136) is arranged at one end of the valve (135), a connecting piston (137) is arranged in the air suction cylinder (130), the size of the connecting piston (137) is matched with the size of the inner wall of the air suction cylinder (130), a connecting plate (138) is arranged behind the connecting, the utility model discloses a detection instrument, including connecting piston (137), activity lead screw (141), pivot, activity lead screw (141), valve (135) and valve, the place ahead of connecting piston (137) is equipped with movable piston (140), the central authorities of connecting piston (137) are equipped with screw hole (139), activity piston (140) rear is equipped with activity lead screw (141), activity lead screw (141) the place ahead is equipped with the pivot, the pivot of activity lead screw (141) rotates to be connected on activity piston (140), activity piston (140) threaded connection be in screw hole (139), suction cylinder (130) are equipped with detector (120) outward, valve (135) pass through the.

2. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 1, wherein: the air pump comprises an air pump body (130), a fixing rod (131) is arranged below the air pump body (130), a plurality of bases (110) are arranged below the air pump body (130), fixing bases (111) are arranged on the bases (110), a plurality of inserting holes are formed in the fixing bases (111), the bases (110) are inserted into the inserting holes in the fixing bases (111), and a plurality of supporting columns (112) are arranged below the bases (110).

3. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 2, wherein: the reciprocating device (200) comprises a fixed block (210), the fixed block (210) is connected behind the connecting plate (138), a connecting block (230) is arranged below the fixed block (210), a connecting rod (214) is arranged below the connecting block (230), one end of the connecting rod (214) is hinged below the connecting block (230), a pair of straight plates (215) are arranged on two sides of the other end of the connecting rod (214), the interval between the straight plates (215) is larger than the thickness of the connecting rod (214), the connecting rod (214) is rotatably connected above the straight plate (215), rotating shafts (216) are arranged on two sides of the straight plate (215), extension rods (218) are arranged on two sides of the rotating shaft (216), the extension rods (218) are fixed on the base (110), and the rotating shaft (216) is rotatably connected to the extension rods (218).

4. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 3, wherein: the side face of the rotating shaft (216) is provided with a rocker (220), the rocker (220) is of a Z-shaped structure, a clamping block (224) is arranged in front of the rocker (220), a clamping groove (217) is formed in the rotating shaft (216), and the rotating shaft (216) is in inserting fit with the clamping groove (217).

5. The air quality detecting device capable of improving the measurement accuracy according to claim 4, wherein: the front end of the rocker (220) is provided with a moving block (223), a round sleeve (221) is sleeved outside the rocker (220), a moving groove (222) is formed in the round sleeve (221), the moving block (223) is connected in the moving groove (222) in a sliding mode, an external thread is arranged on the rotating shaft (216), an internal thread is arranged in front of the round sleeve (221), and the round sleeve (221) is in threaded connection with the rotating shaft (216).

6. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 1, wherein: activity lead screw (141) rear is equipped with knob (142), knob (142) rear is equipped with bull stick (143), knob (142) rear is equipped with indicator lever (144), be equipped with in the middle of indicator lever (144) and change hole (145), it connects to change hole (145) and rotate on bull stick (143), spout (146) have been seted up on connecting plate (138), indicator lever (144) both ends sliding connection is in spout (146), one side of spout (146) is equipped with the scale.

7. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 3, wherein: sliding tray (212) have been seted up to fixed block (210) below, connecting block (230) top is equipped with threaded rod (232), the shape of sliding tray (212) with connecting block (230) phase-match, threaded rod (232) pass the top of fixed block (210), threaded rod (232) top threaded connection has lock nut, circular slot (211) have been seted up in fixed block (210), sliding connection has accommodate the lead screw (240) in circular slot (211), accommodate the lead screw (240) one end is connected with cassette (213), cassette (213) fixed connection be in connecting plate (138) side.

8. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 7, wherein: a threaded hole (231) is formed in the center of the connecting block (230), the adjusting screw rod (240) is in threaded connection with the threaded hole (231), a turntable is arranged at the tail end of the adjusting screw rod (240), the turntable of the connecting rod (214) is rotatably connected into the clamping seat (213), and a screw cap (241) is arranged in front of the adjusting screw rod (240).

9. The air quality detecting apparatus capable of improving the measurement accuracy according to claim 7, wherein: a clamping plate (252) is arranged in front of the clamping seat (213), a pair of fixing plates (250) is fixed behind the connecting plate (138), a bolt (251) is arranged in each fixing plate (250), and the bolt (251) penetrates through the fixing plates (250) and the clamping plate (252).

10. An air quality detecting method capable of improving measurement accuracy, comprising the air quality detecting apparatus capable of improving measurement accuracy according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

s1, pulling the connecting plate (138) outwards to drive the connecting piston (137) and the movable piston (140) connected to the connecting plate (138) to move backwards, and air enters the air extraction cylinder (130) through the air inlet pipe (133);

s2, pushing the connecting plate (138), and enabling air sucked in the air suction cylinder (130) to enter the detector (120) through the exhaust pipe (134);

s3, the position of the movable piston (140) can be adjusted by rotating the movable screw rod (141), so that the position of the movable piston (140) is further finely adjusted, the gas in the suction cylinder (130) is completely sent into the detector (120), and finally the detector (120) starts to detect the air.