Workshop dust content detection device and detection method

Abstract

The invention provides a workshop dust content detection device and detection method, and relates to the technical field of dust detection. The workshop dust content detection device comprises a shell, a bottom cover and a top cover are detachably arranged at the two ends of the shell, an air inlet mechanism is arranged on the top cover, the air inlet mechanism comprises an air inlet cylinder, a rotating part, a flow uniformizing cabin and an air outlet part, an airflow receiving part is arranged on the bottom cover and is in a double-layer cylinder shape, and the rotating part is arranged on the bottom cover. A cavity is formed between the two layers, a filtering device is arranged on the inner side of the airflow receiving part, an air conveying device is communicated between the inner bottom of the airflow receiving part and the flow uniformizing cabin, the air outlet part enables purified air to form multiple air flows to be jetted into the cavity between the two layers of the airflow receiving part, and the air flows drive the air outlet part to rotate. And a plurality of air flows form an air wall, so that the dust-containing air flow on the inner side is blocked, and dust is prevented from escaping to the laser transmitter and the laser receiver to influence a detection result.

Description

Technical Field

[0001] The present application relates to the technical field of dust detection, and in particular to a workshop dust content detection device and detection method. Background Art

[0002] For industries that easily generate dust during the production process, such as coal mining, cement production, textile industry, food processing industry, and pharmaceutical and chemical industry, it is usually necessary to use dust monitoring devices to monitor the air at the work site so as to take appropriate disposal measures, on the one hand to protect the health of workers, and on the other hand to prevent accidents.

[0003] Existing workshop dust detection devices mostly use laser dust meters, which can detect dust concentration in real time and quickly. They can be carried to different locations for detection, making it convenient for mobile monitoring in the workshop. However, during the detection process, the laser transmitter is more susceptible to contamination by dust in the air, which in turn affects its detection accuracy. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a workshop dust content detection device, comprising a shell, a bottom cover and a top cover are detachably provided at both ends of the shell, a laser transmitter and a laser receiver are symmetrically provided on the inner wall of the shell, and a signal processing unit is also provided on the shell, and the signal processing unit is used to convert the optical signal of the laser receiver into an electrical signal.

[0005] The top cover is coaxially provided with an air intake mechanism, and the air intake mechanism includes an air intake cylinder, a rotating member, a flow equalizing chamber and an air outlet member. The air intake cylinder is fixedly plugged into the top cover, the rotating member is rotatably connected to the air intake cylinder, the flow equalizing chamber is fixedly sleeved on the air intake cylinder, and the air outlet member is sealingly rotatably embedded in the flow equalizing chamber, and the bottom end of the air outlet member does not extend out of the bottom end of the air intake cylinder; an airflow receiving member is coaxially provided on the bottom cover, and the airflow receiving member is in the shape of a double-layered cylinder with an outer layer and an inner layer, and a cavity is provided between the two layers, and the cavity is connected to the outer side of the bottom cover. There is a distance between the receiving member and the air inlet cylinder, and the laser transmitter and the laser receiver are located between the airflow receiving member and the air inlet cylinder; a vacuum pump is provided at the inner bottom end of the airflow receiving member, a filtering device is provided on the inner side of the airflow receiving member, and a gas transmission device is connected between the inner bottom of the airflow receiving member and the flow equalizing chamber, and the gas transmission device transmits the filtered gas inside the airflow receiving member to the flow equalizing chamber; the air inlet cylinder and the inner tube diameter of the airflow receiving member are consistent, and the cavity between the double layers of the air outlet member and the airflow receiving member corresponds.

[0006] Preferably, a plurality of axial air outlet holes are evenly arranged circumferentially on the bottom cover, the plurality of axial air outlet holes are communicated with the cavity between the double layers of the airflow receiving member, and a plurality of radial air outlet holes are evenly arranged circumferentially on the side wall of the bottom cover.

[0007] Preferably, the bottom end of the air intake cylinder is open and the air intake cylinder is in a straight cylindrical shape.

[0008] Preferably, the rotating member includes a base, a top pressure block and a plurality of arc-shaped sheets, the base is sealingly rotatably embedded in the upper end surface of the air intake cylinder, the base is an annular arrangement with open ends at the top and bottom, the top opening of the base is larger than the bottom opening, and the upper side of the base is arranged as an arc-shaped convex surface; the top pressure block is a trapezoidal arrangement with an arc-shaped side wall, the top end of the trapezoidal top pressure block is larger than the bottom end, and the side wall of the top pressure block is arranged as an arc-shaped concave surface; the plurality of arc-shaped sheets are evenly arranged circumferentially, and the plurality of arc-shaped sheets are respectively fixed to the arc-shaped convex surface and the arc-shaped concave surface.

[0009] Preferably, the air outlet component includes a rotating cylinder, a plurality of air guide holes and a plurality of guide vanes; the rotating cylinder seal is rotatably sleeved on the air inlet cylinder, and the rotating cylinder seal is rotatably embedded in the flow equalizing chamber; the plurality of air guide holes are circumferentially uniformly arranged on the rotating cylinder, and the plurality of air guide holes are arranged along the axial direction of the rotating cylinder and penetrate the rotating cylinder; the plurality of guide vanes are circumferentially uniformly fixed to the top end of the rotating cylinder, the plurality of guide vanes and the plurality of air guide holes are arranged at intervals, the plurality of guide vanes are arc-shaped and inclined, and the plurality of guide vanes are rotatably arranged inside the flow equalizing chamber.

[0010] Preferably, the air guide holes are arranged at an inclination, and the inclination direction of the air guide holes is consistent with the inclination direction of the guide plate.

[0011] Preferably, the airflow receiving member includes an inner cylinder and an outer cylinder, the inner cylinder is coaxially fixed to the bottom cover, the outer cylinder is coaxially sleeved on the outside of the inner cylinder, and the inner diameter of the outer cylinder is larger than the outer diameter of the inner cylinder to form a cavity therebetween, and the cavity between the outer cylinder and the inner cylinder corresponds to the air outlet member.

[0012] Preferably, the top end of the outer tube does not extend beyond the top end of the inner tube.

[0013] Preferably, the gas delivery device is a gas delivery assembly, which includes a fan for providing delivery power, and an air pipe connected to the air inlet and outlet ends of the fan, the air pipe at the air inlet end is connected to the inner bottom of the airflow receiving component, and the air pipe at the air outlet end is connected to the flow equalization chamber.

[0014] The present invention provides a workshop dust content detection device, which has the following beneficial effects: The rotating part can be used to mix the airflow entering the air inlet cylinder, so that the dust content inside it is as uniform as possible, thereby improving the detection accuracy; the air outlet part is used to form multiple airflows after purification and spray them into the cavity between the double layers of the airflow receiving part. The airflow in the flow equalization chamber and the air outlet part can form a driving force to drive the air outlet part to rotate, thereby driving the air outlet part to rotate, and then the multiple airflows rotate around the air inlet cylinder during the spraying process to form an air wall, which blocks the dust-containing airflow inside and prevents dust from escaping to the laser transmitter and laser receiver to affect the detection results; the filtering device in the airflow receiving part is used to intercept the dust, so that the dust-containing airflow can be purified, and clean gas is provided in the direction of the flow equalization chamber to prevent the formed air wall from containing dust, thereby further preventing the laser transmitter and laser receiver from being affected by the dust; On the other hand, the present application further provides a method for detecting dust content in a workshop, comprising the following steps: S1: Dust in uniform airflow, start the vacuum pump, use the vacuum pump to suck the outside air into the air inlet cylinder, when the airflow passes through the rotating part, it drives the rotating part to rotate, so that the gas entering the air inlet cylinder is mixed during the rotation process; S2: Detection: The airflow flows from the air inlet cylinder to the airflow receiving element below under the negative pressure formed by the vacuum pump. The dust in the airflow between the air inlet cylinder and the airflow receiving element will scatter the light generated by the laser transmitter. The scattered light is received by the laser receiver, and the signal processing unit converts the electrical signal into a dust concentration value according to a pre-set calibration curve (obtained by calibration of dust with known concentration). S3: air flow delivery, delivering the purified gas at the bottom end of the air flow receiving member to the interior of the flow-uniform chamber through the air delivery device; S4: The air wall intercepts the dust. The airflow transported in the flow chamber is sprayed into the cavity between the double layers of the airflow receiving member through the air outlet member. The flow of the airflow drives the air outlet member to rotate, so that a rotating air wall is formed between the air outlet member and the airflow receiving member, which has an intercepting effect on the dust-laden airflow between the air inlet cylinder and the airflow receiving member. S5: Gas discharge: the gas entering the cavity between the two layers of the airflow receiving member is finally discharged from the shell through the bottom cover.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of the overall structure of a workshop dust content detection device according to an embodiment of the present application; Figure 2 is a schematic diagram of the internal structure of a workshop dust content detection device according to an embodiment of the present application; Figure 3 is a partial structural cross-sectional view of a workshop dust content detection device according to an embodiment of the present application; Figure 4 According to the embodiment of the present application Figure 2 A is an enlarged schematic diagram; Figure 5 is a partial structural exploded diagram of an air intake mechanism according to an embodiment of the present application; Figure 6 is an exploded view of a local structure of a rotating member according to an embodiment of the present application; Figure 7 is an exploded view of a local structure of an air outlet member according to an embodiment of the present application; Figure 8 is a partial structural schematic diagram of a dust collection device according to an embodiment of the present application; Fig. 9 is an exploded view of a partial structure of a dust collection device according to an embodiment of the present application; Fig.10 is a structural exploded diagram of a bottom collecting chamber and a top collecting chamber according to an embodiment of the present application; Fig.11 is an exploded view of a local structure of a driving rod and a driving plate according to an embodiment of the present application; Fig.12 It is a schematic diagram of the structure of a flow uniforming component according to an embodiment of the present application.

[0018] Icons: 1. Shell; 11. Bottom cover; 111. Axial air outlet; 112. Radial air outlet; 12. Top cover; 13. Laser transmitter; 14. Laser receiver; 2. Air intake mechanism; 21. Air intake cylinder; 22. Rotating member; 221. Base; 222. Top pressure block; 223. Arc sheet; 224. Arc convex surface; 225. Arc concave surface; 23. Flow-leveling chamber; 24. Air outlet member; 241. Rotating cylinder; 242. Air guide hole; 243. Guide sheet; 3. Air flow receiving member; 31. Inner cylinder; 32. Outer cylinder; 4. Air delivery assembly; 41. Fan; 42. Air pipe; 5. Dust collection device; 51. Support assembly; 511. Air outlet cylinder; 512. Through hole; 513. Notch; 514. Support rod; 51 5. Arc groove; 52. Driving assembly; 521. Guide cabin; 522. Connecting tube; 523. Driving rod; 524. Driving plate; 525. Guide rod; 526. Through groove; 527. Clamping column; 53. Bottom collecting assembly; 531. Bottom collecting cabin; 532. Bottom rotating cover; 533. Bottom cabin partition; 534. Bottom cabin filter; 535. Bottom cover air hole; 536. Bottom cabin air hole; 54. Top collecting assembly; 541. Top collecting cabin; 542. Top rotating cover; 543. Top cabin partition; 544. Top cabin filter; 545. Top cover air hole; 546. Top cabin air hole; 6. Flow uniformity assembly; 61. Rotating plate; 611. Flow uniformity hole; 62. Fixed plate; 621. Air outlet; 63. Connecting shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] Embodiment 1, as Figure 1-Figure 12 As shown, a workshop dust content detection device according to an embodiment of the present application includes a shell 1, and a bottom cover 11 and a top cover 12 are detachably provided at both ends of the shell 1. A laser transmitter 13 and a laser receiver 14 are symmetrically provided on the inner wall of the shell 1. A signal processing unit is also provided on the shell 1, and the signal processing unit is used to convert the optical signal of the laser receiver 14 into an electrical signal.

[0021] It should be noted that the laser transmitter 13, the laser receiver 14, the signal processing unit and how the dust is detected using the light scattering method are all very mature existing technologies and will not be described in detail in the specific embodiments of this application.

[0022] Among them, the top cover 12 is coaxially provided with an air intake mechanism 2, which includes an air intake cylinder 21, a rotating member 22, a flow equalizer chamber 23 and an air outlet member 24. The air intake cylinder 21 is fixedly plugged into the top cover 12, and the rotating member 22 is rotatably connected to the air intake cylinder 21, and the rotational power generated when the airflow passes through is used to make itself form a rotational movement. The flow equalizer chamber 23 is fixedly sleeved on the air intake cylinder 21, and the air outlet member 24 is sealed and rotatably embedded in the flow equalizer chamber 23, and the airflow is also used to form rotation, and the airflow is divided into multiple streams, which are sprayed during the rotation process to form an air wall. The bottom end of the air outlet member 24 does not extend out of the bottom end of the air intake cylinder 21, so as not to interfere with the space required for dust detection. An airflow receiving member 3 is coaxially arranged on the bottom cover 11. The airflow receiving member 3 is in the shape of a double-layered tube with an outer layer and an inner layer, and a cavity is provided between the two layers. The cavity is connected to the outer side of the bottom cover 11 and is used to receive the airflow that forms an air wall. A spacing is left between the airflow receiving member 3 and the air inlet cylinder 21. The laser transmitter 13 and the laser receiver 14 are between the airflow receiving member 3 and the air inlet cylinder 21, which is convenient for dust content detection. A vacuum pump is provided at the inner bottom end of the airflow receiving member 3 to form a driving force for external gas to enter the interior of the shell 1. A filtering device is provided on the inner side of the airflow receiving member 3 to intercept dust. An air delivery device is connected between the inner bottom of the airflow receiving member 3 and the uniform flow chamber 23, and the air delivery device delivers the filtered gas inside the airflow receiving member 3 to the uniform flow chamber 23. The air inlet cylinder 21 and the inner side cylinder diameter of the airflow receiving member 3 are consistent, and the air outlet member 24 corresponds to the cavity between the double layers of the airflow receiving member 3.

[0023] In addition, a workshop dust content detection device according to an embodiment of the present application also has the following additional technical features: like Figure 1-Figure 5 As shown, a plurality of axial air outlet holes 111 are evenly arranged circumferentially on the bottom cover 11, and the plurality of axial air outlet holes 111 are communicated with the cavity between the double layers of the airflow receiving member 3. A plurality of radial air outlet holes 112 are evenly arranged circumferentially on the side wall of the bottom cover 11. It can be seen that the airflow forming the air wall eventually flows out of the shell 1 from the axial air outlet holes 111, and the provision of the radial air outlet holes 112 facilitates the exhaust of the device during placement.

[0024] like Figure 3 and Figure 5 As shown, the bottom end of the air intake cylinder 21 is open, and the air intake cylinder 21 is in a straight cylinder shape.

[0025] like Figure 6As shown, the rotating member 22 includes a base 221, a top pressing block 222 and a plurality of arc-shaped pieces 223. The base 221 is sealed and rotatably embedded in the upper end surface of the air intake cylinder 21. The base 221 is an annular arrangement with openings at both ends, and the top opening of the base 221 is larger than the bottom opening. The upper side of the base 221 is arranged as an arc-shaped convex surface 224. The top pressing block 222 is arranged in a trapezoidal shape with an arc-shaped side wall. The top end of the trapezoidal top pressing block 222 is larger than the bottom end, and the side wall of the top pressing block 222 is arranged as an arc-shaped concave surface 225. Multiple arc-shaped pieces 223 are evenly arranged circumferentially, and the multiple arc-shaped pieces 223 are respectively fixed to the arc-shaped convex surface 224 and the arc-shaped concave surface 225. It can be seen that when external gas passes through the rotating part 22, it will form a rotational force on the rotating part 22, and with the flow of airflow, it will eventually drive the rotating part 22 to rotate at the top of the air inlet cylinder 21, so that the gas entering the air inlet cylinder 21 is mixed, which makes the dust content in the airflow during the detection process uniform, and improves the accuracy of the detection result to a certain extent.

[0026] like Figure 5 and 7 As shown, the air outlet member 24 includes a rotating cylinder 241, a plurality of air guide holes 242 and a plurality of guide vanes 243. The rotating cylinder 241 is sealed and rotatably sleeved on the air inlet cylinder 21, and the rotating cylinder 241 is sealed and rotatably embedded in the equalizing chamber 23. It should be noted that the rotating cylinder 241 can and can only rotate, and cannot be axially displaced on the equalizing chamber 23; the plurality of air guide holes 242 are evenly arranged on the rotating cylinder 241 in the circumferential direction, and the plurality of air guide holes 242 are arranged along the axial direction of the rotating cylinder 241 and penetrate the rotating cylinder 241, so as to facilitate the equalizing chamber 23. 3, the airflow inside is divided into multiple strands; multiple guide vanes 243 are evenly fixed to the top of the rotating cylinder 241 in the circumferential direction; the multiple guide vanes 243 and the multiple air guide holes 242 are arranged at intervals to avoid affecting the airflow entering the air guide holes 242; the multiple guide vanes 243 are arc-shaped and inclined; the multiple guide vanes 243 are rotatably arranged inside the flow equalizing chamber 23, so that it can be known that after the airflow is transported to the flow equalizing chamber 23, it will impact the guide vanes 243, and under the action of the guide vanes 243, a driving force for rotating the rotating cylinder 241 is formed.

[0027] Among them, the air guide hole 242 is set at an angle, and the inclination direction of the air guide hole 242 is consistent with the inclination direction of the guide plate 243. Therefore, the airflow in the air guide hole 242 will further provide power for the rotation of the rotating cylinder 241, and finally cause the air outlet piece 24 to rotate. At the same time, the rotating air outlet piece 24 causes the airflow ejected from the air guide hole 242 to form an air wall.

[0028] like Figure 3 and Figure 5As shown, the airflow receiving member 3 includes an inner cylinder 31 and an outer cylinder 32. The inner cylinder 31 is coaxially fixed to the bottom cover 11, and the outer cylinder 32 is coaxially sleeved on the outside of the inner cylinder 31. The inner diameter of the outer cylinder 32 is larger than the outer diameter of the inner cylinder 31 so that a cavity is formed therebetween. The cavity between the outer cylinder 32 and the inner cylinder 31 corresponds to the air outlet member 24, so that the airflow forming the air wall can directly enter.

[0029] Furthermore, the top end of the outer tube 32 does not extend beyond the top end of the inner tube 31 to avoid affecting the detection space.

[0030] like Figure 1-Figure 3 As shown, the gas delivery device is a gas delivery component 4, which includes a fan 41 for providing delivery power, and an air pipe 42 connected to the air inlet and air outlet ends of the fan 41. The air pipe 42 at the air inlet end is connected to the inner bottom of the airflow receiving component 3, and the air pipe 42 at the air outlet end is connected to the flow equalization chamber 23 to provide clean airflow to the interior of the flow equalization chamber 23 to prevent dust contained in the air wall from affecting the detection results of the entire device.

[0031] The following describes the use process of a workshop dust content detection device according to an embodiment of the present application with reference to the accompanying drawings: When the device is used in a workshop, it can be placed somewhere or tested while moving. The vacuum pump in the device is used to form a negative pressure inside the shell 1 so that the dusty air outside can be sucked into the shell 1. When the gas passes through the rotating part 22, it will drive the rotating part 22 to rotate, and then the airflow will be mixed when it enters the air intake cylinder 21, which will improve the uniformity of the dust in the airflow to a certain extent and improve the test results. The dusty airflow flows from the bottom of the air intake cylinder 21 to the inner cylinder 31. During this process, the laser transmitter 13 emits a light source, and the light will scatter after irradiating the dust in the airflow. The scattered light is received by the laser receiver 14 on the opposite side, and the light signal is transmitted to the signal processing unit. The signal processing unit converts the electrical signal into a dust concentration value according to a preset calibration curve (obtained by calibrating the dust of known concentration) to obtain the test result, and the airflow entering the inner cylinder 31 will be purified by the filter device in the inner cylinder 31, so that the fan 41 extracts the clean airflow and transports it to the flow chamber 23 After the airflow enters the flow-leveling chamber 23, it will impact the guide plate 243 and form a force to drive the rotating cylinder 241 to rotate. At the same time, the airflow enters the multiple obliquely arranged air guide holes 242, further providing power for the rotation of the rotating cylinder 241 and causing the air outlet member 24 to rotate. The airflow is divided into multiple streams by the air guide holes 242 and is ejected into the cavity between the inner cylinder 31 and the outer cylinder 32 as the air outlet member 24 rotates. In this way, an air wall is formed on the outer side of the air inlet cylinder 21 and the inner cylinder 31, which is effective in removing dust from the inner cylinder 21. The airflow is intercepted to prevent dust in the airflow from escaping to the laser emitter 13 and the laser receiver 14. At the same time, since the airflow in the air wall is purified by the filter device, the air wall will not contain dust. In this way, the laser emitter 13 and the laser receiver 14 will be further prevented from being interfered by dust, thereby improving the accuracy of the dust content detection result. In addition, since the dust is purified by the filter device, the dust collected by the filter device can be used to perform another dust content detection by weighing method to verify the accuracy of the above-mentioned light scattering detection method.

[0032] Embodiment 2. In the related art, when the device is used for detection in a workshop with a large amount of dust, the filter device therein may become clogged or the purification effect may be reduced due to intercepting a large amount of dust. This will cause the air flow intensity in the air wall to decrease and the air flow to contain dust, which will cause certain interference to the laser transmitter 13 and the laser receiver 14, affecting the accuracy of the detection results of the device.

[0033] According to some embodiments of the present application, Figure 2 , Figure 8-Figure 11As shown, the filtering device arranged on the inner side of the airflow receiving member 3 is a dust collecting device 5, which includes a supporting assembly 51, a driving assembly 52, a bottom collecting assembly 53 and a top collecting assembly 54. The supporting assembly 51 includes an air outlet 511 coaxially arranged on the bottom cover 11, and a channel for airflow is arranged on the air outlet 511, and a support rod 514 is coaxially rotatably connected to the air outlet 511; the driving assembly 52 includes a guide cabin 521 coaxially connected to the air outlet 511, a connecting cylinder 522 is coaxially connected to the guide cabin 521, a driving rod 523 is damped and slidably inserted on the guide cabin 521, a driving plate 524 is coaxially slidably arranged in the guide cabin 521, the driving plate 524 and the driving rod 523 are fixedly connected, a channel for airflow is arranged on the driving plate 524, the driving plate 524 and the supporting rod 514 are limitedly slidably matched, and the driving plate 524 can drive the supporting rod 514 to rotate a certain angle through axial displacement; The side collecting assembly 53 includes a bottom collecting chamber 531 coaxially connected to the connecting tube 522, a bottom rotating cover 532 is sealingly rotatably connected to the bottom collecting chamber 531, and the bottom rotating cover 532 is fixedly sleeved on the driving rod 523. A bottom chamber filter 534 is arranged in the bottom collecting chamber 531, and both the bottom collecting chamber 531 and the bottom rotating cover 532 are provided with channels for gas circulation; the top collecting assembly 54 includes a top collecting chamber 541 coaxially arranged above the bottom rotating cover 532. It should be noted here that the top collecting chamber 541 can be installed in the inner tube 31 in a damping sliding manner to facilitate installation and disassembly, a top rotating cover 542 is sealingly rotatably connected to the top collecting chamber 541, and the top rotating cover 542 is fixedly connected to the driving rod 523, a top chamber filter 544 is arranged in the top collecting chamber 541, and both the top collecting chamber 541 and the top rotating cover 542 are provided with channels for gas circulation.

[0034] It should be noted that one end of the driving rod 523 away from the driving plate 524 extends out of the bottom cover 11 to facilitate timely operation.

[0035] It should be further explained that, in the specific embodiment of the present application, the bottom cover air holes 535 on the bottom rotating cover 532 and the top cover air holes 545 on the top rotating cover 542 are staggered in the initial state. It can be understood that during actual use, only one of the bottom collecting component 53 and the top collecting component 54 is filtering the airflow.

[0036] like Figure 8 and Fig. 9 As shown, the air flow channels on the air outlet tube 511 are respectively a plurality of through holes 512 uniformly arranged in the circumferential direction at the top end, and notches 513 uniformly arranged in the circumferential direction at the bottom side.

[0037] like Fig.11 As shown, an arc groove 515 is axially arranged on the side wall of the support rod 514 .

[0038] Furthermore, a plurality of guide rods 525 are fixedly arranged in the guide cabin 521 along the axial direction, and the plurality of guide rods 525 slide through the driving plate 524 to facilitate the axial displacement of the driving plate 524 in the guide cabin 521 .

[0039] Furthermore, the passage for airflow to pass through provided on the driving plate 524 is a through groove 526, which facilitates the passage of airflow.

[0040] like Fig.11 As shown, one side of the sliding connection between the driving plate 524 and the support rod 514 is radially fixed with a clamping column 527, and the clamping column 527 and the arc groove 515 are slidably matched. Therefore, it can be understood that when the driving plate 524 is axially displaced in the guide cabin 521, the support rod 514 will rotate through the sliding cooperation between the clamping column 527 and the arc groove 515, and then further, the bottom rotating cover 532 and the top rotating cover 542 will be driven to rotate at the same time. It should be noted here that the angle design of the arc groove 515 needs to meet the requirement that when the support rod 514 rotates, the corresponding bottom cover air holes 535 and the top cover air holes 545 on the bottom rotating cover 532 and the top rotating cover 542 rotate, so that the bottom collecting assembly 53 and the top collecting assembly 54 form an exchange state for the filtration of the air flow.

[0041] Furthermore, the bottom collecting chamber 531 is arranged in an annular cylindrical shape, and a plurality of bottom chamber partitions 533 are evenly arranged in the circumference of the bottom collecting chamber 531. The plurality of bottom chamber partitions 533 divide the interior of the bottom collecting chamber 531 into a plurality of small containing chambers, and the bottom chamber filter elements 534 are arranged at intervals in the plurality of small containing chambers.

[0042] Furthermore, the channel for gas circulation provided on the bottom rotating cover 532 is the bottom cover air hole 535, and the number of the bottom cover air holes 535 is half the number of the multiple small storage chambers divided out inside the bottom collecting chamber 531. The bottom cover air holes 535 and the multiple small storage chambers divided out inside the bottom collecting chamber 531 are connected and spaced correspondingly.

[0043] Furthermore, the channel for gas circulation provided on the bottom collecting chamber 531 is the bottom chamber air hole 536, and the bottom chamber air holes 536 are respectively provided in a plurality of small containing chambers. The bottom chamber air holes 536 connect the annular space at the axis of the small containing chamber and the bottom collecting chamber 531 to facilitate the airflow to pass through the bottom collecting assembly 53.

[0044] Furthermore, the top collecting chamber 541 is arranged in an annular cylindrical shape, and a plurality of top chamber partitions 543 are evenly arranged circumferentially inside the top collecting chamber 541. The plurality of top chamber partitions 543 divide the interior of the top collecting chamber 541 into a plurality of small containing chambers, and the top chamber filter elements 544 are arranged at intervals in the plurality of small containing chambers.

[0045] Furthermore, the channel for gas circulation provided on the top side rotating cover 542 is the top cover air hole 545, and the number of the top cover air holes 545 is half the number of the multiple small storage chambers divided out inside the top side collecting chamber 541. The top cover air holes 545 and the multiple small storage chambers divided out inside the top side collecting chamber 541 are connected and spaced correspondingly.

[0046] Furthermore, the channel for gas circulation provided on the top side collecting cabin 541 is the top cabin air hole 546, and the top cabin air hole 546 is respectively provided in a plurality of small containing cabins. The top cabin air hole 546 connects the annular space at the axis of the small containing cabin and the top side collecting cabin 541 to facilitate the airflow to pass through the top side collecting assembly 54.

[0047] Therefore, during specific use, due to the staggered arrangement of the bottom cover air holes 535 and the top cover air holes 545, in fact, only one of the bottom side collection component 53 and the top side collection component 54 is filtering the airflow. For example, when using it for the first time, the top side collection component 54 filters the airflow. At this time, the top cover air holes 545 will correspond to the small storage compartment where the top cabin filter element 544 is located. The airflow enters from the top cover air holes 545 and enters the top cabin filter element 544 for purification, and then the purified airflow is discharged from the storage compartment. The air passes out of the top cabin air hole 546 in the small storage cabin with the top cabin filter 544, passes through the bottom cover air hole 535 at this time, enters the small storage cabin without the bottom cabin filter 534, and then passes out from the corresponding bottom cabin air hole 536, enters the guide cabin 521, and finally passes through the through groove 526, the through hole 512 and the notch 513 to enter the inner bottom of the inner cylinder 31, and is transported to the uniform flow cabin 23 by the fan 41. In this process, the airflow is only filtered by the top side collection component 54, and a section of After a certain time, the staff axially displaces the driving rod 523 to cause the driving plate 524 to axially displace. At this time, the clamping column 527 on the driving plate 524 will axially displace in the arc groove 515, and force the support rod 514 to rotate under the action of the arc groove 515, so that the bottom rotating cover 532 and the top rotating cover 542 will rotate synchronously in the same direction, so that the top cover air hole 545 is displaced to the direction of the small storage compartment without the top compartment filter element 544, and the bottom cover air hole 535 is displaced to the direction containing In the direction of the small storage compartment of the bottom cabin filter 534, at this time, the airflow will be purified at the bottom cabin filter 534, and the top cabin filter 544 will no longer be used. In this way, the purification of the airflow by the bottom side collecting component 53 and the top side collecting component 54 will be switched. This design will improve the use effect of the detection device and extend the use time. Because the bottom cover 11 and the top cover 12 are detachable, the bottom cabin filter 534 and the top cabin filter 544 can be replaced in time after use.

[0048] Embodiment 3, in the related technology, after the dust-laden airflow in the workshop enters the air inlet cylinder 21, the airflow is mixed only by the rotation of the rotating part 22. The mixing effect is greatly affected by the rotation speed of the rotating part 22. Once the rotation speed of the rotating part 22 is slow, the mixing degree of the airflow will be greatly reduced.

[0049] According to some embodiments of the present application, Figure 2 and Fig.12 As shown, a flow equalizer assembly 6 is coaxially arranged inside the air intake cylinder 21, and the flow equalizer assembly 6 includes a rotating plate 61, a fixed plate 62 and a connecting shaft 63. The rotating plate 61 is sealingly rotatably connected to the inner wall of the air intake cylinder 21; the fixed plate 62 is fixedly connected to the inner wall of the air intake cylinder 21, and the fixed plate 62 is located on the bottom side of the rotating plate 61 with a spacing between the two; the connecting shaft 63 is coaxially fixed to the rotating plate 61 and the rotating member 22.

[0050] Furthermore, a plurality of flow-uniform holes 611 are evenly arranged circumferentially on the rotating plate 61 .

[0051] Furthermore, a plurality of air outlet holes 621 are evenly arranged circumferentially on the fixing plate 62 .

[0052] Therefore, it can be understood that when the rotating member 22 rotates under the action of the airflow, it will drive the rotating plate 61 to rotate through the connecting shaft 63, and the rotation of the rotating plate 61 will cause the multiple flow-uniform holes 611 thereon to have a cutting effect on the passing airflow. At the same time, before the airflow passes through the rotating plate 61, because it is blocked to a certain extent by the rotating plate 61, it will form a certain mixing above the rotating plate 61 in conjunction with the rotation of the rotating member 22. When it passes through the flow-uniform holes 611, because the rotating rotating plate 61 causes the flow-uniform holes 611 to form a cutting effect on the airflow, the airflow is further mixed. When the mixed airflow finally passes through the air outlet 621, it will be mixed again due to the continuous misalignment between the flow-uniform holes 611 and the air outlet 621. In this way, the uniformity of dust in the airflow during the detection process will be greatly guaranteed, and then the accuracy of the detection results will be greatly improved.

[0053] On the other hand, the present application embodiment further provides a method for detecting dust content in a workshop, comprising the following steps: S1: The dust in the uniform airflow is started, and the vacuum pump is used to suck the outside air into the air inlet cylinder 21. When the airflow passes through the rotating member 22, the rotating member 22 is driven to rotate, so that the gas entering the air inlet cylinder 21 is mixed during the rotation process; S2: Detection: the airflow flows from the air inlet cylinder 21 to the airflow receiving member 3 below under the negative pressure formed by the vacuum pump. The dust in the airflow between the air inlet cylinder 21 and the airflow receiving member 3 will scatter the light generated by the laser transmitter 13. The scattered light is received by the laser receiver 14, and the signal processing unit converts the electrical signal into a dust concentration value by calibrating the dust with a known concentration according to a preset calibration curve. S3: air flow delivery, the purified gas at the bottom end of the air flow receiving member 3 is delivered to the interior of the flow equalization chamber 23 through the air delivery device; S4: The air wall intercepts the dust. The airflow transported in the flow chamber 23 is sprayed into the cavity between the double layers of the airflow receiving member 3 through the air outlet member 24. The flow of the airflow drives the air outlet member 24 to rotate, so that a rotating air wall is formed between the air outlet member 24 and the airflow receiving member 3, which has an interception effect on the dust-laden airflow between the air inlet cylinder 21 and the airflow receiving member 3. S5: Gas discharge: the gas entering the cavity between the two layers of the airflow receiving member 3 is finally discharged from the housing 1 through the bottom cover 11 .

[0054] It should be noted that the specific models and specifications of the laser transmitter 13, the laser receiver 14 and the fan 41 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0055] The above are only preferred implementations of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A workshop dust content detection device, comprising a housing (1), wherein two ends of the housing (1) are detachably provided with a bottom cover (11) and a top cover (12), an inner wall of the housing (1) is symmetrically provided with a laser transmitter (13) and a laser receiver (14), and the housing (1) is further provided with a signal processing unit, wherein the signal processing unit is used to convert an optical signal of the laser receiver (14) into an electrical signal, and wherein: An air intake mechanism (2) is coaxially arranged on the top cover (12), the air intake mechanism (2) comprising an air intake cylinder (21), a rotating member (22), a flow equalizing chamber (23) and an air outlet member (24), the air intake cylinder (21) being fixedly plugged into the top cover (12), the rotating member (22) being rotatably connected to the air intake cylinder (21), the flow equalizing chamber (23) being fixedly sleeved on the air intake cylinder (21), the air outlet member (24) being sealingly rotatably embedded in the flow equalizing chamber (23), and the bottom end of the air outlet member (24) not extending out of the bottom end of the air intake cylinder (21); An airflow receiving member (3) is coaxially arranged on the bottom cover (11), the airflow receiving member (3) is arranged in a cylindrical shape with an outer layer and an inner layer, and a cavity is arranged between the two layers, the cavity is communicated with the outer side of the bottom cover (11), a distance is left between the airflow receiving member (3) and the air intake cylinder (21), and the laser transmitter (13) and the laser receiver (14) are located between the airflow receiving member (3) and the air intake cylinder (21); A vacuum pump is provided at the inner bottom end of the airflow receiving member (3), a filtering device is provided on the inner side of the airflow receiving member (3), and a gas transmission device is connected between the inner bottom of the airflow receiving member (3) and the flow equalizing chamber (23), and the gas transmission device transmits the filtered gas inside the airflow receiving member (3) to the flow equalizing chamber (23); The air inlet cylinder (21) and the inner cylinder of the airflow receiving member (3) have the same diameter, and the air outlet member (24) and the cavity between the double layers of the airflow receiving member (3) correspond to each other.

2. A workshop dust content detection device as claimed in claim 1, characterized in that: A plurality of axial air outlet holes (111) are evenly arranged circumferentially on the bottom cover (11), the plurality of axial air outlet holes (111) are in communication with the cavity between the double layers of the airflow receiving member (3), and a plurality of radial air outlet holes (112) are evenly arranged circumferentially on the side wall of the bottom cover (11).

3. A workshop dust content detection device as claimed in claim 1, characterized in that: The bottom end of the air intake cylinder (21) is open, and the air intake cylinder (21) is in the shape of a straight cylinder.

4. A workshop dust content detection device as claimed in claim 1, characterized in that: The rotating member (22) comprises: A base (221), the base (221) being sealingly rotatably embedded in the upper end surface of the air inlet cylinder (21), the base (221) being in the shape of a ring with both ends open, the top opening of the base (221) being larger than the bottom opening, and the upper side of the base (221) being arranged as an arc-shaped convex surface (224); A top pressing block (222), the top pressing block (222) being arranged in a trapezoidal shape with an arc-shaped side wall, the top end of the trapezoidal top pressing block (222) being larger than the bottom end, and the side wall of the top pressing block (222) being arranged in an arc-shaped concave surface (225); A plurality of arc-shaped sheets (223), wherein the plurality of arc-shaped sheets (223) are evenly arranged in the circumferential direction, and the plurality of arc-shaped sheets (223) are respectively fixed to the arc-shaped convex surface (224) and the arc-shaped concave surface (225).

5. A workshop dust content detection device as claimed in claim 1, characterized in that: The gas outlet member (24) comprises: A rotating cylinder (241), the rotating cylinder (241) being sealingly and rotatably sleeved on the air inlet cylinder (21), and the rotating cylinder (241) being sealingly and rotatably embedded in the flow equalizing chamber (23); a plurality of air guide holes (242), the plurality of air guide holes (242) being evenly arranged in the circumferential direction on the rotating cylinder (241), and the plurality of air guide holes (242) being arranged along the axial direction of the rotating cylinder (241) and penetrating the rotating cylinder (241); A plurality of guide vanes (243), the plurality of guide vanes (243) being evenly fixed to the top end of the rotating cylinder (241) in the circumferential direction, the plurality of guide vanes (243) and the plurality of air guide holes (242) being arranged at intervals, the plurality of guide vanes (243) being arc-shaped and inclined, and the plurality of guide vanes (243) being rotatably arranged inside the flow equalizing chamber (23).

6. A workshop dust content detection device as claimed in claim 5, characterized in that: The air guide hole (242) is arranged in an inclined manner, and the inclination direction of the air guide hole (242) is consistent with the inclination direction of the guide plate (243).

7. A workshop dust content detection device as claimed in claim 6, characterized in that: The airflow receiving member (3) comprises an inner cylinder (31) and an outer cylinder (32), wherein the inner cylinder (31) is coaxially fixed to the bottom cover (11), and the outer cylinder (32) is coaxially sleeved on the outside of the inner cylinder (31), and the inner diameter of the outer cylinder (32) is greater than the outer diameter of the inner cylinder (31) so that a cavity is formed between the two, and the cavity between the outer cylinder (32) and the inner cylinder (31) corresponds to the air outlet member (24).

8. A workshop dust content detection device as claimed in claim 7, characterized in that: The top end of the outer cylinder (32) does not extend beyond the top end of the inner cylinder (31).

9. A workshop dust content detection device as claimed in claim 1, characterized in that: The gas delivery device is a gas delivery assembly (4), the gas delivery assembly (4) comprising a fan (41) for providing delivery power, and an air pipe (42) connected to an air inlet end and an air outlet end of the fan (41), the air pipe (42) at the air inlet end being connected to an inner bottom of the air flow receiving member (3), and the air pipe (42) at the air outlet end being connected to the flow equalizing chamber (23).

10. A method for detecting dust content in a workshop, characterized in that: Using a workshop dust content detection device as described in any one of claims 1 to 9, The following steps are involved: S1: dust in a uniform airflow, starting a vacuum pump, and using the vacuum pump to draw outside air into the air inlet cylinder (21). When the airflow passes through the rotating member (22), the rotating member (22) is driven to rotate, so that the gas entering the air inlet cylinder (21) is mixed during the rotation process; S2: Detection, the airflow flows from the air inlet cylinder (21) to the airflow receiving member (3) below under the action of negative pressure formed by the vacuum pump, and the dust in the airflow between the air inlet cylinder (21) and the airflow receiving member (3) scatters the light generated by the laser transmitter (13). The scattered light is received by the laser receiver (14), and the signal processing unit converts the electrical signal into a dust concentration value according to a pre-set calibration curve (obtained by calibration of dust of known concentration); S3: air flow transport, transporting the purified gas at the bottom end of the air flow receiving element (3) to the interior of the flow-uniform chamber (23) through the air delivery device; S4: The air wall intercepts the dust. The airflow transported in the flow-leveling chamber (23) is ejected into the cavity between the two layers of the airflow receiving member (3) through the air outlet member (24). The flow of the airflow drives the air outlet member (24) to rotate, so that a rotating air wall is formed between the air outlet member (24) and the airflow receiving member (3), thereby intercepting the dust-laden airflow between the air inlet cylinder (21) and the airflow receiving member (3). S5: gas discharge. The gas that enters the cavity between the two layers of the airflow receiving member (3) is finally discharged from the housing (1) through the bottom cover (11).

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