A dust processing area explosion concentration detection device

Abstract

The application relates to the technical field of monitoring devices, and particularly discloses a dust processing area explosion-involved concentration detection device which comprises a shell and a control panel, the control panel is installed on one side of the shell, opposite sides of the shell are provided with square tubes, the square tube comprises a tube body and a top plate, the tube body and the top plate are in buckling connection through fasteners, the bottom end of the tube body and the top end of the top plate are provided with through holes, a dust concentration detection assembly is arranged on the square tube, the side wall of the square tube is provided with a drainage structure for pumping and discharging air in the dust processing area, and a cleaning assembly for cleaning the square tube is arranged in the shell. The dust cleaning structure on the inner wall of the pipeline and the surface of the lens is beneficial to keeping the lens clean and scattering the laser, the dehumidification structure is provided, the waste heat recycling structure is provided, energy is saved, and the precision of detecting the dust concentration is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of monitoring devices, in particular to a dust processing area explosion-involved concentration detection device. BACKGROUND

[0002] Dust explosion refers to the propagation of flame in the entire mixed dust space when the combustible dust in the explosion limit range meets the heat source, the chemical reaction speed is extremely fast, a large amount of heat is released at the same time, a very high temperature and a very large pressure are formed, the energy of the system is converted into mechanical energy and the radiation of light and heat, which has very strong destructive power. Dust explosion often occurs in production and processing places where aluminum powder, zinc powder, aluminum material grinding powder, various plastic powder, organic synthetic drug intermediates, wheat flour, sugar, wood chips, dye, bakelite ash, milk powder, tea powder, tobacco powder, coal dust, plant fiber dust, etc. are produced. Therefore, it is necessary to monitor the dust concentration in the dust processing area. Dust concentration monitoring is an important environmental monitoring field, which involves measuring the number and size of suspended particulate matters in the air to assess air quality and prevent related health risks. Dust concentration monitoring usually uses optical scattering principle to estimate the concentration of dust by measuring the degree of light scattering by dust particles.

[0003] During the use of the dust concentration detection device, dust is easily attached to the surface of the lens. The attached dust can affect the scattering of the laser, the irradiation of the laser source and the reception of the light by the photoelectric detector, thereby affecting the detection accuracy. Manual cleaning of the lens is required, which is not convenient to use. SUMMARY

[0004] To solve the above problems in the prior art, the present application provides a dust processing area explosion-involved concentration detection device.

[0005] The object of the present application can be achieved by the following technical solutions:

[0006] A dust processing area explosion-involved concentration detection device, comprising a housing and a control panel, the control panel is installed on one side of the housing, the opposite sides of the housing are provided with square tubes, the square tubes are provided with dust concentration detection assemblies, the side walls of the square tubes are provided with drainage structures for pumping and exhausting air in the dust processing area, and the housing is provided with a cleaning assembly for cleaning the square tubes;

[0007] The square tube comprises a tube body and a top plate, the tube body and the top plate are connected by fasteners in a buckling manner, and the tube body bottom end and the top plate top end are provided with through holes;

[0008] The dust concentration detection assembly comprises a laser source and a photodetector, the pipe body and the through hole of the top plate are both provided with lenses, the laser source is installed at the top end of the top plate, the laser source is matched with the adjacent lens, the photodetector is installed at the bottom end of the pipe body, and the photodetector is matched with the adjacent lens;

[0009] The cleaning assembly comprises a support frame and cleaning cotton, the support frame is located in the square tube, the cleaning cotton is sleeved on the outer wall of the support frame, the cleaning cotton is connected with the inner wall of the square tube in a sliding manner, the two square tubes are matched with the cleaning cotton, the inner wall of one side of the support frame is provided with a support block, the shell is provided with a driving mechanism for driving the support frame to slide, and the top end of the shell is provided with an alarm lamp.

[0010] Preferably, the bottom wall of the shell is provided with a PLC control circuit board, and the inner wall of one side of the shell away from the control panel is provided with a battery assembly.

[0011] Preferably, the drainage structure comprises an air inlet cylinder, an air outlet cylinder and a variable frequency fan, the air inlet cylinder and the air outlet cylinder are both penetrated and fixedly installed on the side of the square tube away from the control panel, the side wall of the air inlet cylinder is provided with a heat exchange cylinder, the side wall of the heat exchange cylinder is provided with an air inlet pipe, the side wall of the air outlet cylinder is provided with a heat preservation cylinder, the heat preservation cylinder is provided in a sleeved manner with the heat exchange cylinder, the inner diameter of the heat preservation cylinder is larger than the outer diameter of the heat exchange cylinder, the side wall of the heat preservation cylinder is provided with an air outlet pipe, the variable frequency fan is installed in the air inlet cylinder, the air inlet cylinder is provided with a heating structure, the variable frequency fan draws the air in the dust processing area from the air inlet pipe, the heat exchange cylinder and the air inlet cylinder into the square tube, and then discharges the air from the air outlet cylinder, the heat preservation cylinder and the air outlet pipe, the laser source emits laser light, cooperates with the adjacent lens to form a thin layer of light source, when the thin layer of light irradiates on the aerosol flowing through the square tube, scattering occurs, the photodetector detects the scattering light intensity of the light, the photodetector generates an electric signal after being irradiated, and then the dust result is displayed on the control panel.

[0012] Preferably, the side wall of the air inlet pipe is provided with a temperature and humidity sensor, the air inlet pipe penetrates the heat preservation cylinder and extends to the outside of the shell, and the air outlet pipe extends to the outside of the shell.

[0013] Preferably, the heating structure comprises a heating resistance wire, the heating resistance wire is provided in a spiral shape, and the heating resistance wire is installed in the air inlet cylinder.

[0014] Preferably, the driving mechanism comprises a screw rod and a servo motor, the screw rod is penetrated and rotationally installed between the opposite two sides of the shell, the screw rod is in threaded connection with the support block, the servo motor is fixedly installed on the surface of the outer wall of one side of the shell, and the output shaft of the servo motor is fixedly connected with the shaft body of the screw rod through a shaft coupling.

[0015] Preferably, a reinforcing block is fixedly installed on the inner wall of the side of the support frame away from the support block, and the reinforcing block is fixedly connected with the support block.

[0016] Preferably, the bottom wall and the bottom end of the top plate of the pipe body are provided with grooves, the lens extends into the adjacent grooves, the grooves on the bottom wall and the bottom end of the top plate reserve space, the pipe body and the top plate are both provided with gaps with the cleaning cotton through the grooves, and in the synchronous sliding process of the cleaning cotton and the support frame, the position of the lens on the cleaning cotton is prevented from adhering to excessive dust on the pipe body or the top plate, the cleaning effect on the lens is improved, and the replacement frequency of the cleaning cotton is reduced.

[0017] The present application has the following beneficial effects:

[0018] 1. By setting the shell, dust concentration detection assembly and drainage structure, the beneficial effect obtained is that the variable frequency fan draws the air in the dust processing area from the air inlet pipe, heat exchange cylinder and air inlet cylinder into the square pipe, and then discharges it from the air outlet cylinder, heat preservation cylinder and air outlet pipe, the laser source emits laser, cooperates with the adjacent lens to form a thin layer of light source, the thin layer of light irradiates the aerosol flowing through the square pipe, scattering occurs, the photoelectric detector detects the scattered light intensity of the light, the photoelectric detector generates an electrical signal after being irradiated, which is proportional to the mass concentration of the aerosol, then multiplied by the voltage calibration coefficient, the coefficient is obtained by measuring the aerosol of a specific concentration, and then the dust result is displayed on the control panel, when the laser source and the photoelectric detector are paused, the variable frequency fan continues to operate, the servo motor drives the screw to rotate, cooperates with the support block to drive the support frame and the cleaning cotton to reciprocate in the square pipe, and the cleaning cotton cleans the dust adhered to the inner wall of the square pipe, cooperates with the variable frequency fan to blow the dust out of the shell, has a cleaning structure for the dust adhered to the inner wall of the pipe and the surface of the lens, is beneficial to keeping the lens clean, is beneficial to the scattering of laser, and ensures the precision of detecting dust concentration.

[0019] 2. By setting the pipe body and the top plate, the beneficial effect obtained is that the grooves on the bottom wall and the bottom end of the top plate of the pipe body reserve space, the pipe body and the top plate are both provided with gaps with the cleaning cotton through the grooves, and in the synchronous sliding process of the cleaning cotton and the support frame, the position of the lens on the cleaning cotton is prevented from adhering to excessive dust on the pipe body or the top plate, the cleaning effect on the lens is improved, and the replacement frequency of the cleaning cotton is reduced.

[0020] 3. By setting the temperature and humidity sensor and the drainage structure, the beneficial effect obtained is that when the temperature and humidity sensor detects that the air temperature is lower than the preset value, the heating resistance wire heats the air entering the air inlet cylinder in cooperation with the PLC control circuit board, the dried air enters the square pipe to complete detection, and then is discharged from the air outlet cylinder, heat preservation cylinder and air outlet pipe, when the dried air carrying heat passes through the heat preservation cylinder, the heat exchange cylinder exchanges heat with the just-inlet wet air, has a dehumidification structure, has a waste heat recycling structure, saves energy, and ensures the precision of detecting dust concentration.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] For the convenience of those skilled in the art, the present application is further described below in conjunction with the drawings.

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is an installation structure diagram of the servo motor in the present application;

[0024] Figure 3 is an installation structure diagram of the battery assembly in the present application;

[0025] Figure 4 is an installation structure diagram of the air inlet cylinder in the present application;

[0026] Figure 5 is an installation structure diagram of the top plate in the present application;

[0027] Figure 6 is an installation structure diagram of the laser source in the present application;

[0028] Figure 7 is a sectional view of the lens in the present application;

[0029] Figure 8 is an installation structure diagram of the support frame in the present application;

[0030] Figure 9 is an installation structure diagram of the pipe body in the present application.

[0031] Explanation of main element symbols:

[0032] In the drawings: 1, housing; 11, PLC control circuit board; 12, battery assembly; 2, control panel; 3, square tube; 31, pipe body; 32, top plate; 33, lens; 34, laser source; 35, photoelectric detector; 4, air inlet cylinder; 41, heat exchange cylinder; 42, air inlet pipe; 43, temperature and humidity sensor; 5, air outlet cylinder; 51, heat preservation cylinder; 52, air outlet pipe; 6, variable frequency fan; 7, heating resistance wire; 81, support frame; 82, cleaning cotton; 83, support block; 84, screw rod; 85, servo motor; 86, reinforcing block; 87, groove; 9, alarm lamp. DETAILED DESCRIPTION

[0033] For further illustrating the technical means and effects adopted by the present application to achieve the predetermined inventive objectives, the specific embodiments, structures, features and effects according to the present application are described clearly and completely in the following in combination with the drawings and preferred embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, instead of all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that the orientation or position relationship indicated by "in", "out" and the like is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0035] Referring to Figures 1-7 and Figure 9 The present application discloses a dust processing area explosion concentration detection device, which comprises a shell 1 and a control panel 2. The control panel 2 is installed on one side of the shell 1. A PLC control circuit board 11 is arranged on the bottom wall of the shell 1, which has a regulating effect. A battery assembly 12 is arranged on the inner wall of the side of the shell 1 away from the control panel 2. Square tubes 3 are arranged on the opposite sides of the shell 1. The square tube 3 comprises a tube body 31 and a top plate 32, which are arranged in a buckling manner through fasteners. The bottom end of the tube body 31 and the top end of the top plate 32 are both provided with through holes, which reserve light transmission space. A dust concentration detection assembly is arranged on the square tube 3. The dust concentration detection assembly comprises a laser source 34 and a photoelectric detector 35. Lenses 33 are arranged in the through holes of the tube body 31 and the top plate 32, which have a light transmission effect. The laser source 34 is installed on the top end of the top plate 32 and matches the adjacent lens 33, which has a laser irradiation effect. The photoelectric detector 35 is installed on the bottom end of the tube body 31 and matches the adjacent lens 33. The laser source 34 irradiates laser, which forms a thin layer of light source in cooperation with the adjacent lens 33. When the laser irradiated on the aerosol flowing through the square tube 3, scattering occurs. The photoelectric detector 35 detects the scattered light intensity of the light. After being irradiated, the photoelectric detector 35 converts the photoelectric effect into an electric signal, which is proportional to the mass concentration of the aerosol, and then multiplied by the voltage calibration coefficient. This coefficient is obtained by measuring the aerosol of a specific concentration. Then the dust result is displayed on the control panel 2.

[0036] Referring to Figures 1-4 and Figure 6The side wall of the square tube 3 is provided with a flow guide structure for pumping dust processing area air, the flow guide structure comprises an air inlet cylinder 4, an air outlet cylinder 5 and a variable frequency fan 6, the air inlet cylinder 4 and the air outlet cylinder 5 are both through and fixedly installed on the side of the square tube 3 away from the control panel 2, a heat exchange cylinder 41 is through the side wall of the air inlet cylinder 4, an air inlet pipe 42 is arranged on the side wall of the heat exchange cylinder 41 and has a flow guide effect, a heat preservation cylinder 51 is through the side wall of the air outlet cylinder 5, the heat preservation cylinder 51 is in a sleeved connection with the heat exchange cylinder 41, the inner diameter of the heat preservation cylinder 51 is larger than the outer diameter of the heat exchange cylinder 41, the air inlet pipe 42 is through the heat preservation cylinder 51 and extends to the outside of the shell 1, an air outlet pipe 52 is arranged on the side wall of the heat preservation cylinder 51 and extends to the outside of the shell 1 and has a flow guide effect, a temperature and humidity sensor 43 is arranged on the side wall of the air inlet pipe 42, the variable frequency fan 6 is installed in the air inlet cylinder 4, a heating structure is arranged in the air inlet cylinder 4 and comprises a heating resistance wire 7, the heating resistance wire 7 is in a spiral shape, the heating resistance wire 7 is installed in the air inlet cylinder 4, the variable frequency fan 6 pumps dust processing area air into the square tube 3 from the air inlet pipe 42, the heat exchange cylinder 41 and the air inlet cylinder 4 and then pumps the air out from the air outlet cylinder 5, the heat preservation cylinder 51 and the air outlet pipe 52, when the temperature and humidity sensor 43 detects that the air temperature is lower than a preset value, the heating resistance wire 7 heats the air in cooperation with the PLC control circuit board 11, at the same time, the air carrying residual heat exchanges the wet air just entering through the heat exchange cylinder 41.

[0037] With reference to Figures 4-9The shell 1 is internally provided with a cleaning assembly for cleaning the square tubes 3, the cleaning assembly comprises a supporting frame 81 and cleaning cotton 82, the supporting frame 81 is located in the square tube 3, the cleaning cotton 82 is sleeved on the outer wall of the supporting frame 81, the cleaning cotton 82 is in close and sliding connection with the inner wall of the square tube 3, the two square tubes 3 are matched with the cleaning cotton 82, the supporting block 83 is arranged on the inner wall of one side of the supporting frame 81 and has a supporting effect, the shell 1 is internally provided with a driving mechanism for driving the supporting frame 81 to slide, the driving mechanism comprises a screw rod 84 and a servo motor 85, the screw rod 84 is rotatably arranged between the opposite two sides of the shell 1, the screw rod 84 is in threaded connection with the supporting block 83 and has a transmission effect, the servo motor 85 is fixedly installed on the surface of the outer wall of one side of the shell 1, the output shaft of the servo motor 85 is fixedly connected with the shaft body of the screw rod 84 through a shaft coupling and has a driving effect, the reinforcing block 86 is fixedly installed on the inner wall of the side of the supporting frame 81 away from the supporting block 83 and is fixedly connected with the supporting block 83 and has a reinforcing effect, the recesses 87 are arranged on the bottom wall of the pipe body 31 and the bottom end of the top plate 32, the lens 33 extends into the adjacent recess 87, the alarm lamp 9 is arranged at the top end of the shell 1 and has a prompting effect, when the laser source 34 and the photoelectric detector 35 are paused, the variable frequency fan 6 continues to operate, the servo motor 85 drives the screw rod 84 to rotate, cooperates with the supporting block 83 to drive the supporting frame 81 and the cleaning cotton 82 to reciprocatingly slide in the square tube 3, the cleaning cotton 82 cleans the dust adhered to the inner wall of the square tube 3, cooperates with the variable frequency fan 6 to blow the dust out of the shell 1, the recesses 87 on the bottom wall of the pipe body 31 and the bottom end of the top plate 32 reserve space, avoid that the position of the lens 33 on the cleaning cotton 82 adheres excessive dust, improve the cleaning effect of the lens 33 and reduce the replacement frequency of the cleaning cotton 82.

[0038] The working principle and use process of the present application: the variable frequency fan 6 draws the air from the dust processing area into the square tube 3 from the air inlet pipe 42, the heat exchange cylinder 41 and the air inlet cylinder 4, and then discharges from the air outlet cylinder 5, the heat preservation cylinder 51 and the air outlet pipe 52, the laser source 34 emits laser light, and cooperates with the adjacent lens 33 to form a thin layer of light source, when the thin layer of light irradiates the aerosol flowing through the square tube 3, scattering will occur, and the scattered light intensity is detected by the photodetector 35, the photodetector 35 generates an electrical signal after being illuminated, which is proportional to the mass concentration of the aerosol, and then multiplied by the voltage calibration coefficient, which is obtained by measuring the aerosol of a certain concentration, and then the dust result is displayed on the control panel 2, when the air temperature detected by the temperature and humidity sensor 43 is lower than the preset value, the heating resistance wire 7 is heated by cooperating with the PLC control circuit board 11, at the same time, the air carrying the residual heat exchanges with the wet air entering through the heat exchange cylinder 41, when the laser source 34 and the photodetector 35 are suspended, the variable frequency fan 6 continues to run, the servo motor 85 drives the screw rod 84 to rotate, and cooperates with the support block 83 to drive the support frame 81 and the cleaning cotton 82 to reciprocate in the square tube 3, the cleaning cotton 82 cleans the dust adhered to the inner wall of the square tube 3, and cooperates with the variable frequency fan 6 to blow the dust out of the shell 1, the grooves 87 on the bottom wall of the pipe body 31 and the bottom end of the top plate 32 reserve space to avoid excessive dust adhering to the position of the lens 33 on the cleaning cotton 82, improve the cleaning effect of the lens 33, and reduce the replacement frequency of the cleaning cotton 82.

[0039] The above is only a preferred embodiment of the present application, not any form of limitation on the present application, although the present application has been disclosed as above, however, it is not intended to limit the present application, any person skilled in the art, without departing from the technical solution range of the present application, can make some changes or modifications of the above disclosed technical content as equivalent embodiments, but as long as it does not deviate from the technical solution content of the present application, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, all still belong to the range of the technical solution of the present application.

Claims

1. A dust processing zone explosive concentration detection device comprising a housing (1) and a control panel (2), characterised in that: The control panel (2) is installed on one side of the shell (1), and the opposite sides of the shell (1) are provided with square tubes (3), the square tubes (3) are provided with dust concentration detection assemblies, the side walls of the square tubes (3) are provided with drainage structures for pumping and discharging dust in the processing area, and the shell (1) is provided with cleaning assemblies for cleaning the square tubes (3); The square tube (3) comprises a tube body (31) and a top plate (32), the tube body (31) and the top plate (32) are in buckling connection through fasteners, and the bottom end of the tube body (31) and the top end of the top plate (32) are provided with through holes; The dust concentration detection assembly comprises a laser source (34) and a photoelectric detector (35), the through holes of the tube body (31) and the top plate (32) are provided with lenses (33), the laser source (34) is installed at the top end of the top plate (32), the laser source (34) is matched with the adjacent lens (33), and the photoelectric detector (35) is installed at the bottom end of the tube body (31) and matched with the adjacent lens (33); The cleaning assembly comprises a support frame (81) and cleaning cotton (82), the support frame (81) is located in the square tube (3), the cleaning cotton (82) is sleeved on the outer wall of the support frame (81), the cleaning cotton (82) is in abutting and sliding connection with the inner wall of the square tube (3), the two square tubes (3) are matched with the cleaning cotton (82), and the inner wall of one side of the support frame (81) is provided with a supporting block (83). The drainage structure comprises an air inlet cylinder (4), an air outlet cylinder (5) and a variable frequency fan (6), the air inlet cylinder (4) and the air outlet cylinder (5) penetrate through and are fixedly installed on the side of the square tube (3) away from the control panel (2), the side wall of the air inlet cylinder (4) is provided with a heat exchange cylinder (41), the side wall of the heat exchange cylinder (41) is provided with an air inlet pipe (42), the side wall of the air outlet cylinder (5) is provided with a heat preservation cylinder (51), the heat preservation cylinder (51) is in sleeved connection with the heat exchange cylinder (41), the inner diameter of the heat preservation cylinder (51) is larger than the outer diameter of the heat exchange cylinder (41), the side wall of the heat preservation cylinder (51) is provided with an air outlet pipe (52), the variable frequency fan (6) is installed in the air inlet cylinder (4), and the air inlet cylinder (4) is provided with a heating structure.

2. A dust processing zone explosive concentration detection apparatus according to claim 1, characterised in that: The bottom wall of the shell (1) is provided with a PLC control circuit board (11), and the inner wall of the side of the shell (1) away from the control panel (2) is provided with a battery assembly (12).

3. A dust processing zone explosive concentration detection apparatus according to claim 1, wherein: The side wall of the air inlet pipe (42) is provided with a temperature and humidity sensor (43), the air inlet pipe (42) penetrates through the heat preservation cylinder (51) and extends to the outside of the shell (1), and the air outlet pipe (52) extends to the outside of the shell (1).

4. The apparatus of claim 1, wherein: The heating structure comprises a heating resistance wire (7), the heating resistance wire (7) is in spiral connection, and the heating resistance wire (7) is installed in the air inlet cylinder (4).

5. A dust processing zone explosive concentration detection apparatus according to claim 1, wherein: The driving mechanism comprises a screw rod (84) and a servo motor (85), the screw rod (84) is rotatably arranged between the opposite sides of the shell (1), the screw rod (84) is in threaded connection with the supporting block (83), and the servo motor (85) is fixedly arranged on the surface of the outer wall of one side of the shell (1); the output shaft of the servo motor (85) is fixedly connected with the shaft body of the screw rod (84) through a shaft coupling.

6. A dust processing zone explosive concentration detection apparatus according to claim 5, characterised in that: The reinforcing block (86) is fixedly arranged on the inner wall of one side of the supporting block (83) away from the supporting block (83).

7. A dust processing zone explosive concentration detection apparatus as defined in claim 1, wherein: The bottom wall and the bottom end of the top plate (32) of the pipe body (31) are provided with grooves (87), and the lens (33) extends into the adjacent grooves (87).

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