Visibility meter calibration platform

Abstract

The utility model relates to the technical field of visibility meter calibration, in particular to a visibility meter calibration platform which comprises a supporting box, a lifting plate is arranged at the top of the supporting box, a gas collecting box is fixedly connected to one side of the supporting box, and the lifting plate is located at the top of the gas collecting box. A fixing shaft is fixedly connected to the bottom, close to the gas collecting box, of the lifting plate, a piston is fixedly connected to the top of the fixing shaft, and a gas outlet pipe is fixedly connected to one end of the gas collecting box. Compared with the traditional steps of firstly installing, then manually cleaning and finally adjusting and testing, the utility model has the advantages that the manual cleaning is saved, the steps are matched to work, the working procedures are reduced, the time is saved, the negative pressure disappears when the lower half part of the gas collecting box is full of air, the second electromagnetic valve is closed, and the third electromagnetic valve is opened, so that the testing efficiency is improved. And then dust and impurities are discharged from the other end of the exhaust pipe. According to the dust collection device, the cleaned dust is collected in a centralized manner.

Description

Technical Field

[0001] The utility model relates to the technical field of visibility meter calibration, in particular to a visibility meter calibration platform. Background Art

[0002] The visibility meter calibration platform is an optical platform used to place the transmission type visibility meter before calibration. Through various tests and adjustments after the transmission type visibility meter is installed on the calibration platform, it can provide more accurate visibility values ​​as standard visibility values, and then calibrate the forward scattering type visibility meter to ensure its accuracy and reliability.

[0003] Most of the existing visibility meter calibration platforms are simply fixed and cannot be rotated and adjusted. It is also impossible to clean the optical lens surface of the visibility meter. This requires manual work, which is cumbersome and time-consuming.

[0004] In this regard, the utility model proposes a visibility meter calibration platform to solve the problem. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0006] Therefore, the purpose of the utility model is to propose a visibility meter calibration platform to solve the problems mentioned in the background technology and overcome the shortcomings in the prior art.

[0007] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides: a visibility meter calibration platform, comprising a support box, a lifting plate is arranged on the top of the support box, a gas collecting box is fixedly connected to one side of the support box, the lifting plate is located at the top of the gas collecting box, a fixed shaft is fixedly connected to the lifting plate near the bottom of the gas collecting box, a piston is fixedly connected to the top of the fixed shaft, an air outlet pipe is fixedly connected to one end of the gas collecting box, a fixed platform is arranged on the other end of the air outlet pipe, an electric push rod is fixedly connected to the inner bottom wall of the support box, the output shaft of the electric push rod is fixedly connected to the lifting plate, a first connecting pipe is fixedly connected to the side of the gas collecting box close to the lifting plate, and a second connecting pipe is fixedly connected to the side of the gas collecting box away from the first connecting pipe;

[0008] The top of the fixed platform is fixedly connected to a support base, the top of the support base is fixedly connected to an airbag, the top of the support base is fixedly connected to a rectangular frame, the interior of the rectangular frame is fixedly connected to the airbag, the airbag is fixedly connected to an air outlet pipe, one end of the airbag is fixedly connected to a pressure relief pipe, the outer surface of the pressure relief pipe is fixedly connected to a first solenoid valve, the outer surface of the pressure relief pipe is provided with a rotating component, one end of the pressure relief pipe is provided with a nozzle, and the rotating component drives the nozzle to rotate.

[0009] Preferably, the rotating assembly includes a rotating roller, which is rotatably connected to the inside of the pressure relief pipe, both ends of the rotating roller penetrate the surface of the pressure relief pipe, a cam is fixedly connected to the outer surface of the rotating roller, and two limit frames are fixedly connected to the outer surface of the pressure relief pipe, the two limit frames are symmetrically distributed, the two limit frames are located above the corresponding cams, and a push rod is slidably connected to the inside of the two limit frames, the bottoms of the two push rods overlap the corresponding cams, one end of the two push rods is rotatably connected to a connecting shaft, and the other ends of the two connecting shafts are rotatably connected to the nozzle, and the rotating assembly drives the nozzle to rotate, the inside of the pressure relief pipe is fixedly connected to a fan-shaped plate, the fan-shaped plate is located above the rotating roller, and the top of the fan-shaped plate is fixedly connected to a hose, and the hose is fixedly connected to the nozzle, the nozzle is circular, and the outer surface of the nozzle is rotatably connected to the inside of the pressure relief pipe, and the inside of the pressure relief pipe is fixedly connected to an inclined plate, and the inclined plate is located below the rotating roller, and the inside of the airbag is fixedly connected to a pressure sensor.

[0010] Preferably, any of the above schemes is that the bottom of the fixed table is fixedly connected to a transverse movable table, one end of the transverse movable table is fixedly connected to a collecting box, one end of the collecting box is fixedly connected to an exhaust pipe, a connecting pipe is fixedly connected to the side of the exhaust pipe close to the air collecting box, a filter is fixedly connected to one end of the connecting pipe close to the exhaust pipe, and a negative pressure sensor is installed inside the air collecting box.

[0011] Preferably, any of the above schemes is that a first sliding groove is provided on the top of the lifting plate, one end of the lifting plate is fixedly connected to a first motor, the interior of the first sliding groove is rotatably connected to a first bidirectional screw, the output end of the first motor is fixedly connected to the first bidirectional screw, and the top of the lifting plate is slidably connected to a longitudinal moving plate.

[0012] Preferably, any of the above schemes is that a second slide groove is provided on the top of the longitudinal movable plate, a second motor is fixedly connected to one end of the longitudinal movable plate, a second bidirectional screw is rotatably connected inside the second slide groove, the second motor is fixedly connected to the second bidirectional screw, a first slider is fixedly connected to the bottom of the longitudinal movable plate, the first slider is threadedly connected to the first bidirectional screw, the first slider slides inside the first slide groove, and a second slider is fixedly connected to the bottom of the transverse movable platform, and the second slider slides inside the second slide groove.

[0013] Preferably, any of the above schemes has a plurality of springs fixedly connected to the inner bottom wall of the air collecting box, the plurality of springs are linearly evenly distributed, a transverse plate fixedly connected to the plurality of springs, the transverse plate overlaps the piston, and a second connecting pipe is fixedly connected to the interior of the transverse plate.

[0014] Preferably, any of the above schemes is that a plurality of universal wheels are fixedly connected to the bottom of the support box, the plurality of universal wheels are evenly and symmetrically distributed, and a lifting support leg is fixedly connected to the bottom of the support box.

[0015] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0016] 1. In the present invention, the interior of the airbag is inflated by squeezing air. After the interior of the airbag is filled with air, the visibility meter body can be supported and fixed. Because the air inside the airbag needs to be depressurized, the air drives the rotating roller to rotate by depressurizing. When the cam rotates, it drives the corresponding push rod to move up and down. The two cams installed oppositely will drive the nozzle to tilt back and forth left and right. The emitting surface and the receiving surface of the visibility meter body can be cleaned of dust by tilting the nozzle back and forth left and right. The present invention adds a mechanism for cleaning dust and dirt during the rising process of the calibration platform, so that the calibration platform can clean the visibility meter body during the adjustment process. Compared with the traditional steps of first installing, then manually cleaning, and finally adjusting and testing, manual cleaning is saved, the steps are coordinated to work, the process is reduced, and time is saved.

[0017] 2. In the present invention, the cleaned dust is collected centrally by means of air reflux. The present invention sets the state when half of the interior of the air collecting box is at negative pressure as the maximum negative pressure value. When half of the interior of the air collecting box is at negative pressure, the negative pressure sensor transmits a signal to the control line to allow the control box to open the second solenoid valve. The air, dust and impurities in the collection box enter the interior of the exhaust pipe through suction. When the lower half of the air collecting box is filled with air, the negative pressure disappears and the second solenoid valve is closed. At this time, the third solenoid valve is opened, and then the dust and impurities are discharged from the other end of the exhaust pipe. The present invention collects the cleaned dust centrally by the above method.

[0018] 3. In the present invention, the calibration platform can be adjusted along the longitudinal and transverse axes by the first bidirectional screw and the second bidirectional screw, and the entire calibration platform can be adjusted up and down by the electric push rod. The above steps make the calibration platform more flexible and convenient to use, and can accurately adjust the appropriate distance, so as to facilitate the alignment of the transmitter and the receiver of the visibility meter for testing.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the interior of the utility model;

[0023] Figure 3 According to the utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 According to the utility model Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure inside the pressure relief pipe according to the utility model;

[0026] Figure 6 It is a schematic diagram of the structure of the lifting plate and the longitudinal moving plate according to the utility model;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the gas collecting box according to the utility model.

[0028] In the figure: 1. Support box; 101. Universal wheel; 102. Lifting plate; 103. Air collecting box; 104. Fixed shaft; 105. Piston; 106. Air outlet pipe; 107. Fixed platform; 108. Support seat; 109. Air bag; 110. Pressure relief pipe; 111. First solenoid valve; 112. Nozzle; 113. Inclined plate; 114. Fan-shaped plate; 115. Hose; 116. First connecting pipe; 117. Second connecting pipe; 118. Second slider; 119. Rectangular frame; 2. Rotating assembly; 201. Rotating roller; 202. Cam; 203, limit frame; 204, push rod; 205, connecting shaft; 3, horizontal moving platform; 301, collecting box; 302, exhaust pipe; 303, connecting pipe; 304, filter; 4, first slide slot; 401, first motor; 402, first bidirectional screw; 5, longitudinal moving plate; 501, second slide slot; 502, second motor; 503, second bidirectional screw; 504, first slider; 6, electric push rod; 7, lifting support leg; 8, spring; 9, horizontal plate; 10, third connecting pipe; 11, visibility meter body. DETAILED DESCRIPTION

[0029] like Figures 1 to 7As shown, a visibility meter calibration platform comprises a support box 1, a lifting plate 102 is arranged on the top of the support box 1, a gas collecting box 103 is fixedly connected to one side of the support box 1, the lifting plate 102 is located on the top of the gas collecting box 103, a fixed shaft 104 is fixedly connected to the bottom of the lifting plate 102 near the gas collecting box 103, a piston 105 is fixedly connected to the top of the fixed shaft 104, an air outlet pipe 106 is fixedly connected to one end of the air collecting box 103, a valve is fixedly connected to the outer surface of the air outlet pipe 106, a fixed platform 107 is arranged on the other end of the air outlet pipe 106, an electric push rod 6 is fixedly connected to the inner bottom wall of the support box 1, the output shaft of the electric push rod 6 is fixedly connected to the lifting plate 102, and a side of the air collecting box 103 near the lifting plate 102 is fixedly connected to The first connecting pipe 116, the third connecting pipe 10 is fixedly connected to the side of the air collecting box 103 away from the first connecting pipe 116, and the third connecting pipe 10 can both exhaust and inlet air. The first connecting pipe 116 in the present invention is connected with a one-way valve, and the first connecting pipe 116 only inlets air. When the present invention works, the control valve on the outlet pipe 106 is first opened to allow air to circulate, and the lifting plate 102 is driven to rise by the electric push rod 6. When the lifting plate 102 rises, it drives the fixed shaft 104 and the piston 105 to move upward. The piston 105 needs to rise to the middle of the air collecting box 103 and then stop. At this time, the lower half of the air collecting box 103 is in a negative pressure state, and the piston 105 rises to drive the air inside the air collecting box 103 to enter the inside of the airbag 109 through the outlet pipe 106;

[0030] The top of the fixed platform 107 is fixedly connected to a support base 108, and the top of the support base 108 is fixedly connected to a rectangular frame 119. The inside of the rectangular frame 119 is fixedly connected to an airbag 109, and the outer side of the airbag 109 is fixed to the inner wall of the rectangular frame 119. The pressure relief pipe 110 penetrates the rectangular frame 119 and is connected to the airbag 109. The air outlet pipe 106 penetrates the rectangular frame 119 and is connected to the airbag 109. The visibility meter body 11 is fixed in the airbag 109. When in use, the visibility meter body 11 is first inserted into the airbag 109, and then the inside of the airbag 109 is inflated. The airbag 109 filled with gas fixes the four sides of the visibility meter body 11, and the airbag 109 is fixedly connected to the air outlet pipe 106. One end of the airbag 109 is fixedly connected to the pressure relief pipe 110, and the outer surface of the pressure relief pipe 110 is fixedly connected to the first solenoid valve 111. The outer surface of the pressure relief pipe 110 is provided with There is a rotating component 2, and a nozzle 112 is arranged at one end of the pressure relief pipe 110. The rotating component 2 drives the nozzle 112 to rotate, and the air inflates the interior of the airbag 109. After the interior of the airbag 109 is filled with air, the visibility meter body 11 can be supported and fixed. When installing the visibility meter, the receiving end of the visibility meter needs to be installed directly below the nozzle 112, so that the nozzle 112 can clean the visibility meter. The airbag 109 can be prevented from leaking through the first solenoid valve 111. When the air inside the airbag 109 reaches the maximum value, the pressure sensor sends a signal to the control box, and the control box opens the first solenoid valve 111, and the airbag 109 begins to deflate into the pressure relief pipe 110. When the pressure of the airbag 109 is less than the maximum pressure after deflation, the pressure sensor sends a signal to the control box to close the first solenoid valve 111 to prevent the airbag 109 from being unable to fix the visibility meter due to excessive deflation.

[0031] The rotating assembly 2 includes a rotating roller 201. A sealing ring is installed at the connection between the output shaft of the rotating roller 201 and the pressure relief pipe 110 in the present invention to prevent gas from flowing out. The rotating roller 201 is rotatably connected to the inside of the pressure relief pipe 110. Both ends of the rotating roller 201 penetrate the surface of the pressure relief pipe 110. A cam 202 is fixedly connected to the outer surface of the rotating roller 201. The two cams 202 in the present invention are installed oppositely. The protruding end of one cam 202 is installed toward one end of the nozzle 112, and the protruding end of the other cam 202 is installed toward the end in the opposite direction of the nozzle 112. At this time, the two push rods 204 are distributed on both sides of the pressure relief pipe 110 one above and one below. Through this installation The nozzle 112 can be rotated left and right in this way. The nozzle 112 in the present invention is always in a tilted state. Only in this way can it achieve the state of left and right rotation. The outer surface of the pressure relief pipe 110 is fixedly connected with two limit frames 203. The two limit frames 203 are symmetrically distributed. The two limit frames 203 are located above the corresponding cams 202. The insides of the two limit frames 203 are slidably connected with a push rod 204. The bottoms of the two push rods 204 overlap the corresponding cams 202. One end of the two push rods 204 is fixedly connected with a connecting shaft 205. The other ends of the two connecting shafts 205 are rotatably connected to the nozzle 112. The rotating component 2 drives the nozzle 112 to rotate, and the pressure relief pipe 110 0 is fixedly connected with a fan-shaped plate 114, which is located above the rotating roller 201. A hose 115 is fixedly connected to the top of the fan-shaped plate 114. The hose 115 is fixedly connected to the nozzle 112. The nozzle 112 is circular. The outer surface of the nozzle 112 is rotatably connected to the inside of the pressure relief pipe 110. The inside of the pressure relief pipe 110 is fixedly connected with an inclined plate 113, which is located below the rotating roller 201. A pressure sensor is fixedly connected to the inside of the airbag 109. Because the air inside the airbag 109 needs to be depressurized, the air will have an impact force. After being blocked by the inclined plate 113, the air flows from the other side of the pressure relief pipe 110, and the depressurized air drives the rotating roller 201. The movable roller 201 rotates, and the rotating roller 201 drives the corresponding cam 202 to rotate when it rotates. When the cam 202 rotates, it drives the corresponding push rod 204 to move up and down. The up and down movement of the push rod 204 drives one of the push rods 204 and the connecting shaft 205 to drive the nozzle 112 to move upward, and the other push rod 204 drives the connecting shaft 205 and the nozzle 112 to move downward. Through two opposite movements, the nozzle 112 reaches a tilted state. Driven by the rotating roller 201, the nozzle 112 tilts back and forth on both sides, so as to clean the dust on the receiving surface and the emitting surface of the visibility meter body 11. When the first solenoid valve 111 is closed, the rotating component 2 stops rotating.

[0032] The bottom of the fixed platform 107 is fixedly connected to a transverse moving platform 3, one end of the transverse moving platform 3 is fixedly connected to a collecting box 301, one end of the collecting box 301 is fixedly connected to an exhaust pipe 302, the exhaust pipe 302 is fixedly connected to a third solenoid valve, the exhaust pipe 302 is fixedly connected to a connecting pipe 303 on the side close to the air collecting box 103, the connecting pipe 303 is located at the cross plate 9 and the top, the cross plate 9 is limited by the spring 8, so the rising height of the cross plate 9 cannot be consistent with the connecting pipe 303, when the piston 105 rises to the middle, the connecting pipe 303 is located between the cross plate 9 and the piston 105, the connecting pipe 303 is fixedly connected to a second solenoid valve, the end of the connecting pipe 303 close to the exhaust pipe 302 is fixedly connected to a filter screen 304, a negative pressure sensor is installed inside the air collecting box 103, because the direction of the nozzle 112 is from top to bottom, the dust on the receiving surface and the emitting surface will directly fall into the collecting box 30 1, because half of the interior of the air collecting box 103 is in a negative pressure state, the present invention sets the state when half of the interior of the air collecting box 103 is in a negative pressure state as the maximum negative pressure value. When half of the interior of the air collecting box 103 is in a negative pressure state, the negative pressure reaches the maximum, and a signal is transmitted to the control line through the negative pressure sensor to let the control box open the second solenoid valve. At this time, air is pumped into the interior of the exhaust pipe 302 through the connecting pipe 303. At this time, the third solenoid valve is in a closed state, so the exhaust pipe 302 can only pump air toward the interior of the collecting box 301, and the air, dust and impurities in the collecting box 301 enter the interior of the exhaust pipe 302 through suction. When passing through the connecting pipe 303, because of the presence of the filter net 304, the air will enter the air collecting box 103 through the connecting pipe 303. When the lower half of the air collecting box 103 is full of air, the negative pressure disappears, and the second solenoid valve is closed. At this time, the third solenoid valve is opened, and then the dust and impurities are discharged from the other end of the exhaust pipe 302.

[0033] A first slide groove 4 is provided at the top of the lifting plate 102, and a first motor 401 is fixedly connected to one end of the lifting plate 102. A first bidirectional screw 402 is rotatably connected inside the first slide groove 4, and an output end of the first motor 401 is fixedly connected to the first bidirectional screw 402. A longitudinal moving plate 5 is slidably connected to the top of the lifting plate 102. The first bidirectional screw 402 is threadedly connected to the inside of the first slider 504. The first bidirectional screw 402 is driven to rotate by the first motor 401, and the first bidirectional screw 402 drives the first slider 504 to move, and the first slider 504 drives the longitudinal moving plate 5 to move longitudinally on the lifting plate 102.

[0034] A second slide groove 501 is provided at the top of the longitudinal movable plate 5, and a second motor 502 is fixedly connected to one end of the longitudinal movable plate 5. A second bidirectional screw 503 is rotatably connected inside the second slide groove 501, and the second motor 502 is fixedly connected to the second bidirectional screw 503. A first slider 504 is fixedly connected to the bottom of the longitudinal movable plate 5, and the first slider 504 is threadedly connected to the first bidirectional screw 402. The first slider 504 slides inside the first slide groove 4, and a second slider 118 is fixedly connected to the bottom of the transverse movable platform 3. The second slider 118 slides inside the second slide groove 501 and is threadedly connected to the second slider 118 through the second bidirectional screw 503. The second motor 502 drives the second bidirectional screw 503 to rotate, and the second bidirectional screw 503 drives the second slider 118 to move. The second bidirectional screw 503 drives the transverse movable platform 3 to move transversely through the second slider 118.

[0035] A number of springs 8 are fixedly connected to the inner bottom wall of the air collecting box 103, and the springs 8 are linearly and evenly distributed. A cross plate 9 is fixedly connected to the springs 8, and the cross plate 9 overlaps the piston 105. A second connecting pipe 117 is fixedly connected inside the cross plate 9, and a one-way valve is fixedly connected to the second connecting pipe 117. The second connecting pipe 117 only exhausts air but does not take in air. When the piston 105 rises, negative pressure will be generated at the bottom of the air collecting box 103. Because the piston 105 moves upward, the suction force generated by the negative pressure will make the cross plate 9 drive the springs 8 to rise. At this time, the third connecting pipe 10 under the cross plate 9 will input gas into the space under the cross plate 9. In the process of the cross plate 9 and the piston 105 rising, the piston 105 rises. The higher the height, the larger the negative pressure space between the cross plate 9 and the piston 105. The negative pressure at the bottom of the cross plate 9 can be reduced by transporting gas to the top of the cross plate 9 through the third connecting pipe 10. When the second solenoid valve opens, the lower half of the air collecting box 103 will inhale air through the connecting pipe 303. At this time, the negative pressure between the cross plate 9 and the piston 105 disappears, and the spring 8 and the cross plate 9 will not be affected by the negative pressure. The spring 8 drives the cross plate 9 to fall rapidly. When the cross plate 9 falls, the air under the cross plate 9 will be squeezed out through the third connecting pipe 10. The spring 8 and the cross plate 9 are set to reduce the pressure received by the lower half of the air collecting box 103, and the connecting pipe 303 is fixed under the cross plate 9 and connected to the cavity under the cross plate 9.

[0036] A plurality of universal wheels 101 are fixedly connected to the bottom of the support box 1, and the universal wheels 101 drive the entire platform to move. The plurality of universal wheels 101 are evenly and symmetrically distributed. A lifting support leg 7 is fixedly connected to the bottom of the support box 1. When the universal wheel 101 drives the entire platform to move to a suitable position, the lifting support leg 7 is extended to support the platform.

[0037] The lifting plate 102 in the present invention needs to adjust the height to adjust the appropriate position of the visibility meter, and then calibrate it. There are two other situations in the present invention. The first situation: the lifting adjustment distance of the lifting plate 102 causes the piston 105 to rise to a height less than the middle of the gas collecting box 103. At this time, first let the lifting plate 102 drive the piston 105 to rise to the middle of the gas collecting box 103. After completing all functions, it is necessary to adjust the lifting plate 102 downward to adjust the lifting plate 102 to a suitable position. Before adjusting the lifting plate 102 downward, it is necessary to close the piston 105 and move it downward. When the piston 105 moves downward, the first connecting pipe 116 takes in air through the one-way valve, and the gas under the piston 105 will flow to the bottom of the cross plate 9 through the second connecting pipe 117 and the one-way valve, and then the gas is discharged to the outside of the gas collecting box 103 through the third connecting pipe 10. The reason for closing the valve is to prevent the air inside the airbag 109 from flowing back into the gas collecting box 103 when the lifting plate 102 drives the piston 105 to move downward.

[0038] The second situation: the distance of the lifting plate 102 rising and adjusting causes the piston 105 to rise to a height greater than the middle of the gas collecting box 103. At this time, the lifting plate 102 does not need to rise to the middle of the gas collecting box 103. The lifting plate 102 can be directly adjusted. No interference is required in the present invention. At this time, the remaining steps are exactly the same as the steps in which the piston 105 needs to rise to the middle of the gas collecting box 103, because the maximum negative pressure value set by the negative pressure sensor is the negative pressure value generated when the piston 105 rises to the middle of the gas collecting box 103. When the piston 105 needs to rise to above the middle of the gas collecting box 103, the negative pressure The sensor works normally, and the piston 105 still rises to the middle of the air collecting box 103 to send a signal to the control box to open the second solenoid valve and close the third solenoid valve at the same time. This is because the negative pressure generated when the piston 105 rises to the middle of the air collecting box 103 is already the maximum value. At this time, the piston 105 is still rising, and the exhaust pipe 302 has already taken air into the air collecting box 103. Therefore, although the piston 105 is still rising, the air collecting box 103 side no longer generates negative pressure because air has already been taken in. When the negative pressure sensor detects that there is no negative pressure inside the air collecting box 103, the second solenoid valve is closed and the third solenoid valve is opened.

[0039] After the use of the present invention is completed, the electric push rod 6 drives the lifting plate 102 to move downward, and the lifting plate 102 drives the piston 105 to move downward. At this time, the air in the airbag 109 begins to flow back to the air collecting box 103 through the air outlet pipe 106, and the piston 105 discharges the air in the lower half of the air collecting box 103 through the second connecting pipe 117, and the first connecting pipe 116 begins to take in air. The second solenoid valve and the third solenoid valve are in a closed state when not in use, and are also in a closed state when the lifting plate 102 starts to be recovered after use.

[0040] The novel device moves the calibration platform to the side of the environmental simulation cabin through the universal wheel 101. The calibration platforms are placed at both ends of the environmental simulation cabin. A visibility meter transmitter is installed on one of the calibration platforms, and a visibility meter receiver is installed on the other calibration platform. Then the lifting support legs 7 are extended to support the calibration platform. The front, rear, left and right positions of the visibility meter body 11 are adjusted by the first bidirectional screw 402 and the second bidirectional screw 503. The electric push rod 6 adjusts the height of the visibility meter. By adjusting the position of the visibility meter body 11, the light emitted by the visibility meter transmitter passes through the forward scattering visibility meter sampling interval in the simulation cabin and is aligned with the receiver for easy testing.

Claims

1. A visibility meter calibration platform, comprising a support box (1), characterized in that: A lifting plate (102) is provided on the top of the support box (1), a gas collecting box (103) is fixedly connected to one side of the support box (1), the lifting plate (102) is located on the top of the gas collecting box (103), a fixed shaft (104) is fixedly connected to the bottom of the lifting plate (102) near the gas collecting box (103), a piston (105) is fixedly connected to the top of the fixed shaft (104), and an outlet pipe (105) is fixedly connected to one end of the gas collecting box (103). 06), a fixed platform (107) is provided at the other end of the air outlet pipe (106), an electric push rod (6) is fixedly connected to the inner bottom wall of the support box (1), an output shaft of the electric push rod (6) is fixedly connected to the lifting plate (102), a first connecting pipe (116) is fixedly connected to the side of the air collecting box (103) close to the lifting plate (102), and a third connecting pipe (10) is fixedly connected to the side of the air collecting box (103) away from the first connecting pipe (116); The top of the fixed platform (107) is fixedly connected to a support seat (108), the top of the support seat (108) is fixedly connected to a rectangular frame (119), the interior of the rectangular frame is fixedly connected to an air bag (109), the air bag (109) is fixedly connected to an air outlet pipe (106), one end of the air bag (109) is fixedly connected to a pressure relief pipe (110), the outer surface of the pressure relief pipe (110) is fixedly connected to a first solenoid valve (111), the outer surface of the pressure relief pipe (110) is provided with a rotating component (2), and one end of the pressure relief pipe (110) is provided with a nozzle (112).

2. The visibility meter calibration platform according to claim 1, characterized in that: The rotating assembly (2) comprises a rotating roller (201), the rotating roller (201) is rotatably connected to the inside of the pressure relief pipe (110), both ends of the rotating roller (201) penetrate the surface of the pressure relief pipe (110), the outer surface of the rotating roller (201) is fixedly connected to a cam (202), the outer surface of the pressure relief pipe (110) is fixedly connected to two limit frames (203), the two limit frames (203) are symmetrically distributed, the two limit frames (203) are located above the corresponding cams (202), the inside of the two limit frames (203) are slidably connected to a push rod (204), the bottoms of the two push rods (204) overlap the corresponding cams (202), one end of the two push rods (204) is rotatably connected to a connecting shaft (205), and the two limit frames (203) are symmetrically distributed, the two limit frames (203) are located above the corresponding cams (202), and the inside of the two limit frames (203) are slidably connected to a push rod (204), the bottoms of the two push rods (204) overlap the corresponding cams (202), and one end of the two push rods (204) is rotatably connected to a connecting shaft (205). The other end of the connecting shaft (205) is rotatably connected to the nozzle (112), and the rotating assembly (2) drives the nozzle (112) to rotate. The pressure relief pipe (110) is fixedly connected to a fan-shaped plate (114) inside, and the fan-shaped plate (114) is located above the rotating roller (201). The top of the fan-shaped plate (114) is fixedly connected to a hose (115), and the hose (115) is fixedly connected to the nozzle (112). The nozzle (112) is circular, and the outer surface of the nozzle (112) is rotatably connected to the inside of the pressure relief pipe (110). The pressure relief pipe (110) is fixedly connected to an inclined plate (113), and the inclined plate (113) is located below the rotating roller (201). The air bag (109) is fixedly connected to a pressure sensor inside.

3. The visibility meter calibration platform according to claim 2, characterized in that: The bottom of the fixed platform (107) is fixedly connected to a transverse movable platform (3), one end of the transverse movable platform (3) is fixedly connected to a collection box (301), one end of the collection box (301) is fixedly connected to an exhaust pipe (302), a side of the exhaust pipe (302) close to the air collecting box (103) is fixedly connected to a connecting pipe (303), one end of the connecting pipe (303) close to the exhaust pipe (302) is fixedly connected to a filter screen (304), and a negative pressure sensor is installed inside the air collecting box (103).

4. The visibility meter calibration platform according to claim 3, characterized in that: A first slide groove (4) is provided at the top of the lifting plate (102); one end of the lifting plate (102) is fixedly connected to a first motor (401); a first bidirectional screw rod (402) is rotatably connected inside the first slide groove (4); an output end of the first motor (401) is fixedly connected to the first bidirectional screw rod (402); and a longitudinal moving plate (5) is slidably connected to the top of the lifting plate (102).

5. The visibility meter calibration platform according to claim 4, characterized in that: A second slide groove (501) is provided at the top of the longitudinal movable plate (5), a second motor (502) is fixedly connected to one end of the longitudinal movable plate (5), a second bidirectional screw (503) is rotatably connected inside the second slide groove (501), the second motor (502) is fixedly connected to the second bidirectional screw (503), a first slider (504) is fixedly connected to the bottom of the longitudinal movable plate (5), the first slider (504) is threadedly connected to the first bidirectional screw (402), the first slider (504) slides inside the first slide groove (4), a second slider (118) is fixedly connected to the bottom of the transverse movable platform (3), the second slider (118) slides inside the second slide groove (501).

6. The visibility meter calibration platform according to claim 5, characterized in that: A plurality of springs (8) are fixedly connected to the inner bottom wall of the air collecting box (103), the plurality of springs (8) are linearly and evenly distributed, a transverse plate (9) is fixedly connected to the plurality of springs (8), the transverse plate (9) overlaps the piston (105), and a second connecting pipe (117) is fixedly connected inside the transverse plate (9).

7. The visibility meter calibration platform according to claim 6, characterized in that: The bottom of the support box (1) is fixedly connected to a plurality of universal wheels (101), and the plurality of universal wheels (101) are evenly and symmetrically distributed. The bottom of the support box (1) is fixedly connected to a lifting support leg (7).

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