High-pressure air inlet guider

Abstract

According to the high-pressure air inlet guider applied to the related technical field of compressors, through the arrangement of a passive compensation unit and an active compensation unit, firstly, an abrasion point can be expanded outwards, then the abrasion degree of the connecting position of a cam and a driving main shaft is reduced, meanwhile, when the abrasion loss is accumulated to a certain degree, an abrasion monitoring unit is triggered, and the abrasion monitoring unit is started; compared with the prior art, on one hand, the abrasion state can be monitored in real time, certain abrasion compensation can be carried out, on the other hand, early warning can be carried out during abrasion, timely maintenance is facilitated, and the service life of the device is prolonged. Therefore, the influence of deviation abrasion on the air inlet flow is greatly reduced, and the regulation and control precision of the air inlet flow is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to a high-pressure air intake guide, and in particular to a high-pressure air intake guide applied to the technical field related to compressors. Background Art

[0002] The specification of Chinese patent CN116146536B discloses a flow regulating device and a centrifugal compressor, and the specification of Chinese patent CN105020160A discloses a high-efficiency flow regulating device for a compressor. The contents disclosed in these two patents both use blades with a rotatable control angle to be set on the intake channel to regulate the size of the intake flow. However, this method has the following problems: the blades are in an inclined state, and the gas pressure during intake does not fall vertically on the blades, but will produce a certain inclination angle with them, causing the blades to be subjected to a certain deflection force, thereby causing deflection wear between the shaft connected to the blades and the drive shaft.

[0003] When eccentric wear occurs, the shaft that controls the rotation of the blades is also susceptible to eccentric force, causing wear, which can easily cause the adjustment structure to become stuck. In severe cases, it will affect the accuracy of the compressor control system in adjusting the blade rotation angle. In the prior art, this wear is generally eliminated by regularly maintaining and replacing parts to maintain the accuracy of the flow control process. However, in the interval between two maintenance adjustments, when more serious wear occurs, it cannot be adjusted in time, resulting in the control accuracy of the compressor's intake flow still being greatly affected. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the blades used to regulate the flow are always cut at an angle, which may easily cause eccentric wear of the shaft, affect the accuracy of the regulating device in adjusting the blade angle, and affect the accuracy of the compressor intake flow control.

[0005] In order to solve the above problems, the present invention provides a high-pressure air intake guide, including an outer ring light intensity sensor and an outer sleeve transparent sheet fixedly connected to each other by bolts, the upper ends of the outer ring light intensity sensor and the outer sleeve transparent sheet are fixedly connected with a connecting plate light-transmitting hole, a guide unit is arranged in the outer sleeve transparent sheet, the guide unit includes a left base ring, a right base ring fixed to the left base ring by bolts, a plurality of linkage adjustment units and a plurality of deflection blades respectively connected to the ends of the linkage adjustment units, a driving main shaft is movably penetrated in the middle of the upper end of the outer sleeve transparent sheet, the lower end of the driving main shaft is movably penetrated through the connection between the left base ring and the right base ring and is fixedly connected to one of the linkage adjustment units, a follower ring is arranged on the outer sleeve of the right base ring, a plurality of positioning rods distributed in an annular array are threadedly connected to the end of the follower ring away from the linkage adjustment unit, a guide wheel is movably connected to the positioning rod, an annular guide groove is also excavated outside the right base ring, and the plurality of guide wheels are all embedded in the annular guide groove and are slidably connected to the annular guide groove; The direction-changing blade includes a driven rocker arm movably embedded in the connection between the left base ring and the right base ring and a blade fixedly connected to the end of the driven rocker arm close to the axis of the left base ring, and the multiple blades are all located in the inner ring of the left base ring. The linkage adjustment unit includes a cam fixedly connected to the end of the driven rocker arm away from the blade, two ball bearings respectively connected to the follower ring and the cam, and a connecting rod fixedly connected between the two ball bearings. The lower end of the driving main shaft is inserted into the upper end of the corresponding cam. The cam and the driving main shaft are both provided with corresponding through holes, and positioning pins are commonly inserted into the through holes of the two. Passive compensation units and active compensation units are respectively provided at the left and right ends of the cam, and the two ends of the positioning pin extend between the passive compensation unit and the active compensation unit respectively.

[0006] In the above-mentioned high-pressure intake guide, through the setting of passive compensation units and active compensation units, on the one hand, the wear status can be monitored in real time and certain wear compensation can be performed; on the other hand, early warning can be given when wear occurs, which is convenient for timely maintenance, thereby greatly reducing the impact of eccentric wear on the intake flow rate and effectively ensuring the control accuracy of the intake volume.

[0007] As a further improvement of the present application, both ends of the cam are semicircular, and the diameters of the two semicircles are different, the driving spindle is coaxial with the large diameter semicircle of the cam, and the connecting rod is coaxial with the small diameter semicircle.

[0008] As a further improvement of the present application, the passive compensation unit and the active compensation unit both include two symmetrical compensation petals, the compensation petals include a positioning seat fixedly connected to the cam, a back plate fixedly connected to an end of the positioning seat away from the cam, and a compensation sleeve fixedly connected to a section of the back plate near the positioning pin, an embedded groove is bored inside the compensation sleeve, a compensation rod is installed on the inner wall of the embedded groove near the positioning pin, and both compensation sleeves are close to the positioning pin but do not contact the positioning pin.

[0009] As a further improvement of the present application, the compensation rod and the compensation sleeve on the passive compensation unit are coaxially arranged, and the compensation rod and the compensation sleeve on the active compensation unit are eccentrically arranged.

[0010] As a further improvement of the present application, the two compensation petals on the active compensation unit are also connected to two wear monitoring units, which include an audible and visual alarm installed on the end of the back plate away from the compensation sleeve, and a contact piece connected to the end of the compensation sleeve close to the positioning pin. The contact piece is connected in series with the circuit where the audible and visual alarm is located. A wire is also connected in series with the circuit where the audible and visual alarm is located, and the wire is embedded in the positioning pin. The end of the wire passes through the positioning pin and extends to the surface of the positioning pin, and the end of the wire corresponds to the contact piece.

[0011] As a further improvement of the present application, the compensation rod includes an electric push rod, a pressure sensor fixedly installed on the extended end of the electric push rod, and a compensation section fixedly connected to the sensing end of the pressure sensor. The four compensation sections all interfere with the positioning pins, and the pressure data of multiple pressure sensors remain consistent.

[0012] As another improvement of the present application, a sensing groove is excavated in the middle of the compensation section, and a sensing rod is fixedly connected in the sensing groove. The sensing rod includes an elastic section fixedly connected to the bottom wall of the sensing groove and a hard section fixedly connected to the upper end of the elastic section. The end of the hard section is flush with the surface of the compensation section. The compensation section is made of hard material, and the hardness of the compensation section is lower than the hardness of the positioning pin.

[0013] As another improvement supplement of the present application, an inner detection cavity is bored inside the top of the hard segment, and connecting plate light-transmitting holes evenly distributed in a spiral are bored at the outer end of the top of the hard segment, an outer sleeve transparent sheet is connected to the opening of the connecting plate light-transmitting holes, and an outer ring light intensity sensor is installed on the top of the inner detection cavity, and the outer ring light intensity sensor is higher than multiple connecting plate light-transmitting holes.

[0014] In summary, through the setting of passive compensation units and active compensation units, the wear point can be expanded outward first, thereby reducing the wear at the connection between the cam and the drive spindle. At the same time, when the wear accumulates to a certain extent, the wear monitoring unit will be triggered, and then the wear will be warned at a fixed point. At the same time, according to the wear condition, the worn side can be compensated, thereby effectively eliminating the influence of wear on the intake volume control. Compared with the existing technology, on the one hand, real-time monitoring of the wear status can be realized, and certain wear compensation can be performed. On the other hand, early warning can be given when wear occurs, which is convenient for timely maintenance, thereby greatly reducing the influence of eccentric wear on the intake flow rate, and effectively ensuring the control accuracy of the intake volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application; Figure 2 A left side perspective view of the internal guide unit of the first embodiment of the present application; Figure 3 This is an exploded view of the first embodiment of the present application; Figure 4 A three-dimensional diagram of a plurality of linkage adjustment units according to a first embodiment of the present application; Figure 5 A right side perspective view of the internal guide unit of the first embodiment of the present application; Figure 6 This is a schematic diagram of the analysis of the wear point of the first embodiment of the present application; Figure 7 This is a schematic diagram of a passive compensation unit and an active compensation unit provided outside a cam in a first embodiment of the present application; Figure 8 A three-dimensional diagram of a cam portion of a first embodiment of the present application; Fig. 9 A schematic top view of an active compensation unit according to a first embodiment of the present application; Fig.10 This is a schematic top view of a passive compensation unit according to a first embodiment of the present application; Fig.11 This is a schematic diagram of a compensation rod according to a first embodiment of the present application; Fig.12 A schematic diagram of a cross section of a compensation section according to a second embodiment of the present application; Fig.13 This is a comparative schematic diagram of the second embodiment of the present application when the compensation section is worn out and when the compressor is working and stopped; Fig.14 This is a front cross-sectional schematic diagram of a sensing rod according to a second embodiment of the present application; Fig.15 This is a schematic diagram of a radial cross section of a sensing rod according to a second embodiment of the present application; Description of the numbers in the figure: 11 outer ring, 12 outer sleeve, 13 connecting plate, 2 driving spindle, 3 guide unit, 31 left base ring, 32 right base ring, 301 annular guide groove, 302 guide wheel, 303 positioning rod, 4 linkage adjustment unit, 41 cam, 42 ball bearing, 43 connecting rod, 401 positioning pin, 5 follower ring, 61 driven rocker, 62 blade, 7 compensation flap, 71 positioning seat, 72 back plate, 73 compensation sleeve, 701 touch piece, 8 sound and light alarm, 9 compensation rod, 91 electric push rod, 92 pressure sensor, 93 compensation section, 101 hard section, 102 elastic section, 11 light intensity sensor, 12 transparent sheet, 13 light transmission hole. DETAILED DESCRIPTION

[0016] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0017] The first implementation method: Figure 1-4A high-pressure air intake guide is shown, including an outer ring light intensity sensor 11 and an outer sleeve transparent sheet 12 fixedly connected to each other by bolts, the upper ends of the outer ring light intensity sensor 11 and the outer sleeve transparent sheet 12 are fixedly connected with a connecting plate light transmission hole 13, and a guide unit 3 is arranged in the outer sleeve transparent sheet 12, the guide unit 3 includes a left base ring 31, a right base ring 32 fixed to the left base ring 31 by bolts, a plurality of linkage adjustment units 4 and a plurality of deflection blades respectively connected to the ends of the linkage adjustment units 4, the deflection blade includes a driven rocker rod 61 movably embedded at the connection between the left base ring 31 and the right base ring 32, and a blade 62 fixedly connected to the driven rocker rod 61 near one end of the axis of the left base ring 31, and the plurality of blades 62 are all located on the left base ring The inner ring of 31, the middle part of the upper end of the transparent sheet 12 of the outer sleeve is movably penetrated by a driving main shaft 2, the lower end of the driving main shaft 2 is movably penetrated by the connection between the left base ring 31 and the right base ring 32 and is fixedly connected to one of the linkage adjustment units 4, and a follower ring 5 is arranged on the outer sleeve of the right base ring 32. When the air intake of the compressor needs to be adjusted, the control unit of the compressor controls the motor driving the driving main shaft 2 to rotate, so that the linkage adjustment unit 4 directly connected to the driving main shaft 2 is driven, thereby driving the follower ring 5 to rotate, thereby making multiple linkage adjustment units 4 swing accordingly, making multiple change-direction blades connected to multiple linkage adjustment units 4 rotate, thereby realizing the synchronous adjustment of the angles of multiple blades 62 by the driving main shaft 2, and realizing the adjustment of the air intake, such as Figure 5 The end of the follower ring 5 away from the linkage adjustment unit 4 is threadedly connected with a plurality of positioning rods 303 distributed in a ring array, and a guide wheel 302 is movably connected to the positioning rod 303. An annular guide groove 301 is also excavated outside the right base ring 32, and a plurality of guide wheels 302 are all embedded in the annular guide groove 301 and are slidably connected to the annular guide groove 301. When the follower ring 5 is driven to rotate, the plurality of guide wheels 302 rotate along the annular guide groove 301, thereby guiding the rotation of the follower ring 5, making it difficult for it to move axially along the right base ring 32, and at the same time converting the friction between the follower ring 5 and the right base ring 32 into rolling friction, effectively reducing friction, thereby improving the flexibility and stability of the driving spindle 2 when adjusting the angle of the blade 62.

[0018] like Figure 4 The linkage adjustment unit 4 includes a cam 41 fixedly connected to the end of the driven swing rod 61 away from the blade 62, two ball bearings 42 respectively connected to the follower ring 5 and the cam 41, and a connecting rod 43 fixedly connected between the two ball bearings 42. The lower end of the driving spindle 2 is inserted into the upper end of the corresponding cam 41. The cam 41 and the driving spindle 2 are both provided with corresponding through holes, and the through holes on the two are jointly inserted with a positioning pin 401. Figure 6-7A passive compensation unit and an active compensation unit are respectively provided at the left and right ends of the cam 41, and the two ends of the positioning pin 401 extend between the passive compensation unit and the active compensation unit respectively. The passive compensation unit and the active compensation unit each include two symmetrical compensation petals 7, and the compensation petal 7 includes a positioning seat 71 fixedly connected to the cam 41, a back plate 72 fixedly connected to the end of the positioning seat 71 away from the cam 41, and a compensation sleeve 73 fixedly connected to a section of the back plate 72 close to the positioning pin 401. An embedded groove is bored inside the compensation sleeve 73, and a compensation rod 9 is installed on the inner wall of the embedded groove close to the positioning pin 401. Both compensation sleeves 73 are close to the positioning pin 401 but do not contact the positioning pin 401. When in use, the compensation rods 9 of the passive compensation unit and the active compensation unit can be controlled to extend and align with the positioning pin 401. The positioning pin 401 is in conflict with the compensation rod 9, and the pressure data generated by the multiple pressure sensors 92 are kept consistent, so that the positioning pin 401 is in a balanced state, and through the setting of the passive compensation unit and the active compensation unit, the positioning pin 401 conflicts with the compensation rod 9 during use, so that the wear points of the positioning pin 401, the cam 41 and the inner hole wall of the driving spindle 2 expand outward and extend to the connection between the compensation rod 9 and the positioning pin 401, making this place more prone to wear, thereby effectively alleviating the wear of the cam 41 and the driving spindle 2, increasing the service life, and reducing the frequency of disassembling and replacing each part in the later stage.

[0019] like Figure 9-10 The compensation rod 9 on the passive compensation unit is coaxially arranged with the compensation sleeve 73, and the compensation rod 9 on the active compensation unit is eccentrically arranged with the compensation sleeve 73. Since the passive compensation unit is not provided with a wear monitoring unit and only provided with the compensation rod 9, the compensation rod 9 is coaxial with the compensation sleeve 73.

[0020] like Fig.11 The compensation rod 9 includes an electric push rod 91, a pressure sensor 92 fixedly installed on the extended end of the electric push rod 91, and a compensation section 93 fixedly connected to the sensing end of the pressure sensor 92. The four compensation sections 93 are in conflict with the positioning pin 401, and the pressure data of multiple pressure sensors 92 are consistent. The compensation section 93 is made of hard material, and the hardness of the compensation section 93 is lower than the hardness of the positioning pin 401. When wear occurs under the action of the deflection force, the compensation section 93 will wear first, so that the two pressure sensors 92 can produce obvious data differences more quickly, and one of the pressure sensors 92 will tend to become smaller, so that it is convenient for staff to judge the wear condition. When the wear accumulates to a certain extent, it is convenient for the contact piece 701 to contact the end of the wire, thereby triggering an alarm.

[0021] The two compensation petals 7 on the active compensation unit are also connected to two wear monitoring units, which include an audible and visual alarm 8 installed on the end of the back plate 72 away from the compensation sleeve 73, and a contact piece 701 connected to the end of the compensation sleeve 73 close to the positioning pin 401. The contact piece 701 is connected in series with the circuit where the audible and visual alarm 8 is located. A wire is also connected in series to the circuit where the audible and visual alarm 8 is located, and the wire is embedded in the positioning pin 401. The end of the wire passes through the positioning pin 401 and extends to the surface of the positioning pin 401, and the end of the wire corresponds to the contact piece 701. When the compressor is working, due to the deflection force, the data of the two pressure sensors 92 in the active compensation unit will increase and decrease respectively. The data of the two pressure sensors 92 in the passive compensation unit will change in the same way, and the two pressure sensors 92 with increased data are angled relative to each other, and even the data of one of the pressure sensors 92 disappears. The size of the deflection force can be effectively judged based on the data difference. As the use time increases, the wear degree will gradually increase. Figure 7 Under the action of the deflection force, the positioning pin 401 will be deflected to the worn side, gradually conflicting with the contact piece 701, and then the end of the wire will overlap with the contact piece 701, so that the sound and light alarm 8 is turned on and the alarm is triggered, which is convenient for timely maintenance. At the same time, after the alarm is triggered, the two compensation rods 9 of the big data can be controlled to extend, and then push the positioning pin 401 from both ends, thereby eliminating the slight imbalance due to wear and achieving the effect of wear compensation, until the two pressure sensors 92 whose data disappears generate force data.

[0022] The second implementation method: Based on the first embodiment, this embodiment adds a sensing rod and related structures, and the rest of the parts are consistent with the first embodiment.

[0023] Fig.12 As shown, a sensing groove is excavated in the middle of the compensation section 93, and a sensing rod is fixedly connected in the sensing groove. The sensing rod includes an elastic section 102 fixedly connected to the bottom wall of the sensing groove and a hard section 101 fixedly connected to the upper end of the elastic section 102. The end of the hard section 101 is flush with the surface of the compensation section 93, and an inner detection cavity is excavated in the top of the hard section 101. Figure 14-15 The outer end of the top of the hard section 101 is also drilled with spirally evenly distributed connecting plate light-transmitting holes 13, the mouth of the connecting plate light-transmitting holes 13 is connected to the outer sleeve transparent sheet 12, and the top of the inner detection cavity is installed with an outer ring light intensity sensor 11, which is higher than the multiple connecting plate light-transmitting holes 13. Fig.13When the compensation section 93 is slightly worn, when the fan is not working, the resistance of the deflection force is lost, and the elastic section 102 will restore its deformation, so that the end of the hard section 101 can be extended outside the compensation section 93, so that the mouth of the connecting plate light-transmitting hole 13 is exposed, so that the connecting plate light-transmitting hole 13 can transmit light, so that the outer ring light intensity sensor 11 can sense the light intensity, and thus when the fan is not working, the deflection wear can also be timely judged, and the greater the degree of wear, the more the number of connecting plate light-transmitting holes 13 that are leaked, and the greater the light intensity data obtained by the outer ring light intensity sensor 11, the wear amplitude can be effectively judged based on the data changes at the connecting plate light-transmitting holes 13. Compared with the first embodiment, the degree of wear can only be judged when the fan is working. This embodiment has a better effect on wear monitoring, and can perform accurate compensation in advance before the fan works, and can effectively make up for the wear abnormalities within the two regular maintenance time periods, so that the adjustment of the air intake volume when the fan is working is more accurate.

[0024] In summary, through the setting of passive compensation units and active compensation units, the wear point can be expanded outward first, thereby reducing the wear at the connection between the cam 41 and the drive spindle 2. At the same time, when the wear accumulates to a certain extent, the wear monitoring unit will be triggered, and then the wear will be warned at a fixed point. At the same time, according to the wear condition, the worn side can be compensated, thereby effectively eliminating the influence of wear on the intake volume control. Compared with the existing technology, on the one hand, real-time monitoring of the wear status can be realized, and certain wear compensation can be performed. On the other hand, early warning can be given when wear occurs, which is convenient for timely maintenance, thereby greatly reducing the influence of eccentric wear on the intake flow rate, and effectively ensuring the control accuracy of the intake volume.

[0025] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high-pressure air intake guide, characterized in that: It comprises an outer ring light intensity sensor and an outer sleeve transparent sheet which are fixedly connected to each other by bolts, the upper ends of the outer ring light intensity sensor and the outer sleeve transparent sheet are fixedly connected with a connecting plate light-transmitting hole, a guide unit is arranged inside the outer sleeve transparent sheet, the guide unit comprises a left base ring, a right base ring fixed to the left base ring by bolts, a plurality of linkage adjustment units and a plurality of direction-changing blades respectively connected to the ends of the linkage adjustment units, a driving main shaft is movably penetrated through the middle of the upper end of the outer sleeve transparent sheet, the lower end of the driving main shaft is movably penetrated through the connection between the left base ring and the right base ring and is fixedly connected to one of the linkage adjustment units, a follower ring is arranged on the outer sleeve of the right base ring, a plurality of positioning rods distributed in an annular array are threadedly connected to the end of the follower ring away from the linkage adjustment unit, a guide wheel is movably connected to the positioning rod, an annular guide groove is also excavated outside the right base ring, and a plurality of guide wheels are all embedded in the annular guide groove and are slidably connected to the annular guide groove; The direction-changing blade includes a driven rocker arm movably embedded in the connection between the left base ring and the right base ring, and a blade fixedly connected to the driven rocker arm at one end close to the axis of the left base ring, and a plurality of the blades are located in the inner ring of the left base ring. The linkage adjustment unit includes a cam fixedly connected to the end of the driven rocker arm away from the blade, two ball bearings respectively connected to the follower ring and the cam, and a connecting rod fixedly connected between the two ball bearings. The lower end of the driving main shaft is inserted into the upper end of the corresponding cam. The cam and the driving main shaft are both provided with corresponding through holes, and positioning pins are inserted into the through holes of the two. Passive compensation units and active compensation units are respectively provided at the left and right ends of the cam, and the two ends of the positioning pin extend between the passive compensation unit and the active compensation unit respectively.

2. A high pressure air intake guide according to claim 1, characterized in that: Both ends of the cam are semicircular, and the diameters of the two semicircles are different. The driving spindle is coaxial with the large-diameter semicircle of the cam, and the connecting rod is coaxial with the small-diameter semicircle.

3. A high pressure air intake guide according to claim 1, characterized in that: The passive compensation unit and the active compensation unit both include two symmetrical compensation petals, each of which includes a positioning seat fixedly connected to the cam, a back plate fixedly connected to an end of the positioning seat away from the cam, and a compensation sleeve fixedly connected to a section of the back plate near the positioning pin, an embedded groove is bored inside the compensation sleeve, a compensation rod is installed on the inner wall of the embedded groove near the positioning pin, and both of the compensation sleeves are close to the positioning pin but do not contact the positioning pin.

4. A high-pressure air intake guide according to claim 3, characterized in that: The compensation rod and the compensation sleeve on the passive compensation unit are coaxially arranged, and the compensation rod and the compensation sleeve on the active compensation unit are eccentrically arranged.

5. A high pressure air intake guide according to claim 4, characterized in that: The two compensation petals on the active compensation unit are also connected to two wear monitoring units, and the two wear monitoring units include an audible and visual alarm installed on the end of the back plate away from the compensation sleeve, and a contact piece connected to the end of the compensation sleeve close to the positioning pin. The contact piece is connected in series with the circuit where the audible and visual alarm is located. A wire is also connected in series with the circuit where the audible and visual alarm is located, and the wire is embedded in the positioning pin. The end of the wire passes through the positioning pin and extends to the surface of the positioning pin, and the end of the wire corresponds to the contact piece.

6. A high-pressure air intake guide according to claim 5, characterized in that: The compensation rod includes an electric push rod, a pressure sensor fixedly installed on the extended end of the electric push rod, and a compensation section fixedly connected to the sensing end of the pressure sensor. The four compensation sections all conflict with the positioning pins, and the pressure data of multiple pressure sensors remain consistent.

7. A high pressure air intake guide according to claim 6, characterized in that: A sensing groove is bored in the middle of the compensation section, a sensing rod is fixedly connected in the sensing groove, the sensing rod comprises an elastic section fixedly connected to the bottom wall of the sensing groove and a hard section fixedly connected to the upper end of the elastic section, the end of the hard section is flush with the surface of the compensation section, the compensation section is made of hard material, and the hardness of the compensation section is lower than the hardness of the positioning pin.

8. A high pressure air intake guide according to claim 7, characterized in that: An inner detection cavity is bored in the top of the hard section, and connecting plate light-transmitting holes evenly distributed in a spiral are bored at the outer end of the top of the hard section. An outer sleeve transparent sheet is connected to the opening of the connecting plate light-transmitting holes, and an outer ring light intensity sensor is installed on the top of the inner detection cavity. The outer ring light intensity sensor is higher than multiple connecting plate light-transmitting holes.

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