Control system and method of electronically controlled dry dust collector based on bus control technology

Abstract

The present invention discloses an electric-controlled dry dust collector control system and method based on bus control technology, which relates to the technical field of mine health protection equipment, including: a dry dust collector body and an electric control system; a plurality of filter cartridges are evenly distributed and fixed on the filter cartridge frame, and a plurality of cleaning pipelines are connected to the cleaning air bag, and each cleaning pipeline is placed above the filter cartridge; a pneumatic pulse valve is arranged on the cleaning pipeline, and a pneumatic solenoid valve is connected in parallel on the control air path of the pneumatic pulse valve, and the pneumatic solenoid valve is connected to the solenoid valve controller; a differential pressure gauge is arranged on the dust collector frame housing, and the solenoid valve controller is connected to the dry dust collector control box via a CAN bus. The cleaning method of the present invention is more efficient, and the service life of the filter cartridge is increased. The automatic cleaning and linkage dust removal functions reduce the workload of coal miners and improve the level of occupational health.

Description

Technical Field

[0001] The present invention relates to the technical field of mine health protection equipment, and more particularly to a control system and method for an electrically controlled dry dust collector based on bus control technology. Background Art

[0002] In the coal mining industry, dust occupational hazards are relatively common, with direct economic losses reaching 8 billion.

[0003] The dust collection and removal technology of coal mine dust removal equipment can be divided into dry dust removal and wet dust removal. Wet dust removal is achieved by using technologies such as atomized water capture and dust removal, water filtration, and cyclone dust removal, while dry dust collectors use flame-retardant HEPA, flame-retardant filter cloth and other filter media to capture dust into the gaps in the filter material, which is more effective in capturing respirable dust.

[0004] The dry dust collector is composed of a pleated air filter element, a pulse dust cleaning module, a dust discharge mechanism, an air collection hood, a flexible skeleton duct, an exhaust fan, etc. The dust collector is driven by an exhaust fan. The air mixed with dust is sucked into the dust collection hood and flows into the dust chamber. After being filtered by the filter cartridge in the dust chamber, the dust is adsorbed into the filter cartridge medium, and the clean air is discharged from the clean air chamber. As the filter cartridge continues to collect dust, the pressure difference between the clean air chamber and the dust chamber will gradually increase. Workers can observe the pressure difference gauge to determine whether the filter cartridge has reached the dust storage limit, and manually control the pneumatic pulse valve to realize the pulse cleaning function. The power source of the pulse valve is the high-pressure gas stored in the high-pressure air bag.

[0005] However, the prior art currently has the following disadvantages:

[0006] 1. The dust removal fan of the dry dust collector needs to manually control the fan starter. The starter can only be turned on manually, there is no linkage function, and the operation is relatively cumbersome;

[0007] 2. When cleaning the dust filter cartridge, factors such as the cleaning air pressure and the number of cleaning valves opened have a great influence on the cleaning efficiency. In the tunneling work face with high work intensity, workers rarely have enough time and energy to wait for the high-pressure air bag to be inflated, and will not use a single-channel cleaning method to improve the cleaning efficiency. The correct dry dust collector operation process is too cumbersome for tunneling workers who are tired of production.

[0008] Therefore, how to solve the problems of no linkage of fans, complicated startup process, complex operation of cleaning function and low efficiency of manual operation is a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0009] In view of this, the present invention provides an electronically controlled dry dust collector control system and method based on bus control technology, which solves the problems existing in the prior art.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] An electric-controlled dry dust collector control system based on bus control technology, comprising: a dry dust collector body and an electric control system, the dry dust collector body comprising a dust collector frame shell, a filter cartridge, a pneumatic pulse valve, a dust cleaning pipeline, a differential pressure gauge and a dust cleaning air bag, and the electric control system comprising a dry dust collector control box, a solenoid valve controller and a pneumatic solenoid valve;

[0012] Multiple filter cartridges are evenly distributed and fixed on the filter cartridge frame. The cleaning air bag is connected to multiple cleaning pipelines, and each cleaning pipeline is placed above the filter cartridge. A pneumatic pulse valve is arranged on the cleaning pipeline, and a pneumatic solenoid valve is connected in parallel on the control air line of the pneumatic pulse valve. The pneumatic solenoid valve is connected to the solenoid valve controller.

[0013] The differential pressure gauge is arranged on the frame shell of the dust collector, and the solenoid valve controller is connected with the dry dust collector control box through the CAN bus.

[0014] Optionally, the dust collector frame shell includes: a front frame shell, a rear frame shell and a top cover plate, and the top cover plate is fixed on the top of the front frame shell and the rear frame shell.

[0015] Optionally, it also includes a front dust cleaning key panel and a rear dust cleaning key panel; the front dust cleaning key panel is installed on the front frame shell, and the rear dust cleaning key panel is installed on the rear frame shell.

[0016] Optionally, an air inlet and an air outlet are provided on the frame shell of the dust collector, the air inlet is connected to a dust hood, and the air outlet is connected to an exhaust fan.

[0017] Optionally, the dry dust collector control box is connected to the fan inverter through the dry node output port, and the fan inverter is connected to the exhaust fan.

[0018] Optionally, a wired controller is also included, and the wired controller communicates with the dry dust collector control box via a 485 bus.

[0019] Optionally, it also includes a dust sensor, a differential pressure sensor and a pressure transmitter, all of which are connected to the dry dust collector control box;

[0020] Dust sensor, used to detect dust concentration in the working environment;

[0021] A differential pressure sensor is used to detect the pressure difference between the air inlet and the air outlet;

[0022] Pressure transmitter, used to detect the pressure of the cleaning air bag.

[0023] Optionally, it also includes an intrinsically safe power supply and a switching power supply. The intrinsically safe power supply supplies power to the dust sensor, differential pressure sensor and pressure transmitter, and the switching power supply supplies power to the solenoid valve controller, pneumatic solenoid valve and the control circuit in the dry dust collector control box.

[0024] A control method for an electrically controlled dry dust collector based on bus control technology comprises the following steps:

[0025] The dust sensor is used to detect the dust concentration in the working environment. When the dust concentration reaches the starting threshold of the exhaust fan, the dry dust collector control box automatically controls the exhaust fan to start, realizing the dust linkage dust removal function.

[0026] The pressure difference sensor is used to detect the pressure difference between the air inlet and the air outlet. When the pressure difference increases to the threshold of automatic dust cleaning, the dry dust collector control box controls each solenoid valve controller in turn through the CAN bus; the solenoid valve controller starts the controlled pneumatic solenoid valve in turn, and then drives the pneumatic pulse valve to perform dust cleaning operation;

[0027] The cleaning operation detects the pressure of the cleaning air bag through the pressure transmitter. Each time a pneumatic solenoid valve is started, the inflation time is determined according to the pressure of the cleaning air bag. When the air pressure reaches the set cleaning air pressure value, the next pneumatic solenoid valve is started until the automatic cleaning is completed.

[0028] The status of the pneumatic pulse valve and coil is judged based on the pressure change of the cleaning air bag. If there is no obvious change in the pressure of the cleaning air bag after the system sends a pneumatic solenoid valve start signal, it is considered that the cleaning system is faulty.

[0029] It can be seen from the above technical solutions that compared with the prior art, the present invention provides an electronically controlled dry dust collector control system and method based on bus control technology. Compared with a dry dust collector without electronic control, a more efficient cleaning method can be used for cleaning, thereby increasing the service life of the filter cartridge. The automatic cleaning function and the linkage function reduce the workload of coal miners. The linkage dust removal function can start the dry dust collector faster, reduce the time that coal miners are exposed to dust, and improve their occupational health level. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 A structural diagram of the control system of an electrically controlled dry dust collector based on bus control technology provided by the present invention;

[0032] Figure 2 A working principle diagram provided for the present invention;

[0033] Figure markings: 1-dry dust collector control box, 2-air outlet, 3-pressure regulating filter, 4-differential pressure gauge, 5-rear cleaning button panel, 6-rear frame shell, 7-side cover plate, 8-front frame shell, 9-front cleaning button panel, 10-air inlet, 11-cleaning air bag, 12-top cover plate, 13-filter cartridge frame, 14-pneumatic pulse valve, 15-filter cartridge, 16-solenoid valve controller, 17-cleaning pipeline, 18-pneumatic solenoid valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The embodiment of the present invention discloses an electric control type dry dust collector control system based on bus control technology, such as Figure 1 As shown (the top is the main view, the bottom is the top view), it includes: a dry dust collector body and an electric control system, the dry dust collector body includes a dust collector frame shell, a filter cartridge 15, a pneumatic pulse valve 14, a dust cleaning pipeline 17, a differential pressure gauge 4 and a dust cleaning air bag 11, and the electric control system includes a dry dust collector control box 1, a solenoid valve controller 16 and a pneumatic solenoid valve 18;

[0036] A plurality of filter cartridges 15 are evenly distributed and fixed on the filter cartridge frame 13. The cleaning air bag 11 is connected to a plurality of cleaning pipelines 17, and each cleaning pipeline 17 is placed above the filter cartridge 15. A pneumatic pulse valve 14 is arranged on the cleaning pipeline 17. A pneumatic solenoid valve 18 is connected in parallel to the control air path of the pneumatic pulse valve 14. The pneumatic solenoid valve 18 is connected to the solenoid valve controller 16.

[0037] The pressure differential gauge 4 is arranged on the frame housing of the dust collector, and the solenoid valve controller 16 is connected to the dry dust collector control box 1 through the CAN bus. A pneumatic solenoid valve 18 is connected in parallel to the control air path of the pneumatic pulse valve 14, and the pneumatic solenoid valve 18 is driven by the explosion-proof coil to realize the electric control function of the pneumatic pulse valve 14. The solenoid valve controller 16 can drive 8 pneumatic solenoid valves 18 and communicate with the dry dust collector control box 1 through the CAN bus.

[0038] Among them, this embodiment adds a parallel explosion-proof pneumatic solenoid valve 18, which can retain the original mechanical manual cleaning function while realizing electronically controlled cleaning; the solenoid valve controller 16 is connected to the explosion-proof dry dust collector control box 1 through the CAN bus, which facilitates the expansion of the product to dust collectors of different specifications and has high communication stability.

[0039] Further, the dust collector frame housing includes: a front frame housing 8, a rear frame housing 6 and a top cover plate 12, and the top cover plate 12 is fixed to the top of the front frame housing 8 and the rear frame housing 6. In addition, a side cover plate 7 is also included, and the side cover plate 7 is arranged on the rear frame housing 6.

[0040] Furthermore, it also includes a front dust cleaning key panel 9 and a rear dust cleaning key panel 5 ; the front dust cleaning key panel 9 is installed on the front frame shell 8 , and the rear dust cleaning key panel 5 is installed on the rear frame shell 6 .

[0041] Furthermore, the dust collector frame shell is provided with an air inlet 10 and an air outlet 2, the air inlet 10 is connected to a dust hood, and the air outlet 2 is connected to an exhaust fan. In addition, a pressure regulating filter 3 is also provided near the air outlet 2 and is connected to the dry dust collector control box 1.

[0042] Furthermore, the dry dust collector control box 1 is connected to the fan inverter through the dry node output port, and the fan inverter is connected to the exhaust fan. In addition, the dry dust collector control box 1 has a reserved network port and a spare 485 communication port, which can be connected to the mining industrial ring network to realize equipment networking.

[0043] Furthermore, it also includes a wired controller, which communicates with the dry dust collector control box 1 through a 485 bus. The wired controller is intrinsically safe, and has four buttons and an LED display on the panel to realize human-computer interaction functions related to the dry dust collector control box 1, such as controlling the start and stop of the exhaust fan and controlling the pneumatic cleaning process.

[0044] Further, refer to Figure 2 , also including a dust sensor, a differential pressure sensor and a pressure transmitter, all of which are connected to the dry dust collector control box 1;

[0045] Dust sensor, used to detect dust concentration in the working environment;

[0046] A pressure difference sensor, used to detect the pressure difference between the air inlet 10 and the air outlet 2;

[0047] The pressure transmitter is used to detect the pressure of the dust cleaning air bag 11.

[0048] Furthermore, it also includes an intrinsically safe power supply and a switching power supply. The intrinsically safe power supply supplies power to the dust sensor, the differential pressure sensor and the pressure transmitter, and the switching power supply supplies power to the solenoid valve controller 16, the pneumatic solenoid valve 18 and the control circuit in the dry dust collector control box 1.

[0049] In addition, the number of solenoid valve controllers 16 is determined according to the model of the dry dust collector. In this embodiment, a dry dust collector with 32-way pulse valves is taken as an example, and four solenoid valve controllers 16 need to be configured.

[0050] This embodiment also discloses a control method for an electrically controlled dry dust collector based on bus control technology, comprising the following steps:

[0051] The dust sensor is used to detect the dust concentration in the working environment. When the dust concentration reaches the starting threshold of the exhaust fan, the dry dust collector control box 1 automatically controls the exhaust fan to start, realizing the dust linkage dust removal function;

[0052] The pressure difference sensor is used to detect the pressure difference between the air inlet 10 and the air outlet 2. When the pressure difference increases to the threshold value of automatic dust cleaning, the dry dust collector control box 1 controls each solenoid valve controller 16 in turn through the CAN bus; the solenoid valve controller 16 starts the controlled pneumatic solenoid valve 18 in turn, and then drives the pneumatic pulse valve 14 to perform dust cleaning operation;

[0053] The cleaning operation detects the pressure of the cleaning air bag 11 through the pressure transmitter. Each time a pneumatic solenoid valve 18 is started, the inflation time is determined according to the pressure of the cleaning air bag 11. When the air pressure reaches the set cleaning air pressure value, the next pneumatic solenoid valve 18 is started until the automatic cleaning is completed.

[0054] The status of the pneumatic pulse valve and coil is judged based on the pressure change of the cleaning air bag. If there is no obvious change in the pressure of the cleaning air bag after the system sends a pneumatic solenoid valve start signal, it is considered that the cleaning system is faulty.

[0055] Based on the design of this application, the following functions can be achieved:

[0056] (1) Dust removal function: The fan can be started and stopped by remote control to control the dust removal function.

[0057] (2) Equipment linkage dust removal function: The explosion-proof dry dust collector control box 1 can be connected to the industrial control network and controlled by the host computer software, so that the software can control the dust collector to be linked with other equipment; the linkage device dry node signal can also be connected to the explosion-proof dry dust collector control box 1 to realize the linkage function with the equipment; when the linkage device is started, the exhaust fan will act randomly.

[0058] (3) Dust-linked dust removal function: The explosion-proof dry dust collector control box 1 can be connected to a dust sensor. When the dust sensor detects that the dust concentration in the working environment reaches the fan start-up threshold, the explosion-proof dry dust collector control box 1 can automatically control the exhaust fan to start, thereby realizing the dust-linked dust removal function.

[0059] (4) Automatic dust cleaning function: After starting the automatic dust cleaning process, the explosion-proof dry dust collector control box 1 controls each solenoid valve controller 16 in turn through the CAN bus. After receiving the dust cleaning signal, the solenoid valve controller 16 starts the controlled explosion-proof pneumatic solenoid valve 18 in turn, and then drives the pneumatic pulse valve 14 to perform the dust cleaning operation. This operation will automatically start all the pneumatic pulse valves 14 in turn. If it is interrupted in the middle, the address of the last explosion-proof pneumatic solenoid valve 18 started will be recorded, and the remaining valves will be started in sequence next time. The automatic dust cleaning function will detect the air pressure of the dust cleaning air bag 11. Each time an explosion-proof pneumatic solenoid valve 18 is started, the inflation time is determined according to the air pressure of the dust cleaning air bag 11. When the air pressure reaches the set cleaning air pressure value, the next explosion-proof pneumatic solenoid valve 18 will be started.

[0060] (5) Automatic dust cleaning based on accumulated dust removal time: After the fan has been running for a certain period of time, a round of automatic dust cleaning will be automatically started, and all explosion-proof pneumatic solenoid valves 18 will be started in turn. The accumulated running time is set to 10 minutes by default, and will be reset to zero after each dust removal. The user can adjust the timing time according to the on-site environment and experience.

[0061] (6) Automatic dust cleaning when the fan is shut down: After the fan is shut down, it will determine whether to perform automatic dust cleaning based on the accumulated running time. If the accumulated running time when the fan is shut down is greater than half of the set time, the entire machine will be automatically cleaned.

[0062] (7) Automatic cleaning by pressure difference: After the fan has been running for a period of time, the dust collected in the filter cartridge 15 will clog the filter cartridge 15. At this time, the pressure difference between the air outlet 2 and the air inlet 10 will increase. When the pressure difference increases to the threshold of automatic cleaning, the whole machine will be automatically cleaned.

[0063] (8) Manual cleaning: You can manually control the opening and closing of a single valve. This function is used when single-line cleaning, debugging, or maintenance is required.

[0064] (9) Abnormal status: When the wired controller is offline, the exhaust fan can be manually started and stopped by the fan inverter, and the dust removal function can be used normally; the automatic cleaning function when shutting down is automatically adjusted to the on state, and the fan is cleaned according to the action logic when it is shut down; the timed cleaning function is automatically adjusted to the on state, and the timer time is based on the time value set before the remote control is disconnected.

[0065] The above functions (1) to (8) can all be switched on and off and their parameters adjusted through a wired controller.

[0066] Compared with the prior art, the present embodiment adds an electronic control system, which outputs a dry node signal to the fan inverter, so that the fan can start automatically according to the dust concentration, start together with the linkage equipment, start remotely, and other functions, which solves the problem of no linkage and complicated start-up process of the fan, and improves the dust removal efficiency; adds an electronic control function to the pulse valve, and writes automatic cleaning logic to realize one-button automatic cleaning of the whole machine; sets different cleaning functions, and production personnel do not need to operate the dry dust collector after setting the cleaning parameters, which solves the problem of complex cleaning function operation and low manual operation efficiency, and reduces the frequency of manual intervention; the pulse valve electronic control module is connected in parallel with the pneumatic control module of the original equipment. Once the electronic control module is damaged, the workers can still use the pneumatic control module to control the pulse valve, which improves the system reliability.

[0067] As the occupational safety and health of coal miners are gradually paid more attention, a large number of dry dust collectors are used in dust control work on excavation working surfaces. The application and large-scale promotion of electronically controlled dry dust collectors can further improve the efficiency of dust control in coal mines.

[0068] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. As for the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0069] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronically controlled dry dust collector control system based on bus control technology, characterized in that: include: Dry dust collector body and electric control system. The dry dust collector body includes dust collector frame shell, filter cartridge, pneumatic pulse valve, dust cleaning pipeline, differential pressure gauge and dust cleaning air bag. The electric control system includes dry dust collector control box, solenoid valve controller and pneumatic solenoid valve; Multiple filter cartridges are evenly distributed and fixed on the filter cartridge frame. The cleaning air bag is connected to multiple cleaning pipelines, and each cleaning pipeline is placed above the filter cartridge. A pneumatic pulse valve is arranged on the cleaning pipeline, and a pneumatic solenoid valve is connected in parallel on the control air line of the pneumatic pulse valve. The pneumatic solenoid valve is connected to the solenoid valve controller. The differential pressure gauge is arranged on the frame housing of the dust collector, and the solenoid valve controller is connected to the dry dust collector control box via the CAN bus; An air inlet and an air outlet are provided on the dust collector frame shell, the air inlet is connected to a dust hood, and the air outlet is connected to an exhaust fan; the dry dust collector control box is connected to the fan inverter through the dry node output port, and the fan inverter is connected to the exhaust fan; It also includes a dust sensor, a differential pressure sensor and a pressure transmitter, all of which are connected to the dry dust collector control box; Dust sensor, used to detect dust concentration in the working environment; A differential pressure sensor is used to detect the pressure difference between the air inlet and the air outlet; Pressure transmitter, used to detect the pressure of the cleaning air bag.

2. According to claim 1, an electronically controlled dry dust collector control system based on bus control technology is characterized in that: The dust collector frame shell comprises: a front frame shell, a rear frame shell and a top cover plate, and the top cover plate is fixed on the top of the front frame shell and the rear frame shell.

3. According to claim 2, an electronically controlled dry dust collector control system based on bus control technology is characterized in that: It also includes a front dust cleaning key panel and a rear dust cleaning key panel; the front dust cleaning key panel is installed on the front frame shell, and the rear dust cleaning key panel is installed on the rear frame shell.

4. According to the electronically controlled dry dust collector control system based on bus control technology as described in claim 1, it is characterized in that: It also includes a wired controller, which communicates with the dry dust collector control box through a 485 bus.

5. The electronically controlled dry dust collector control system based on bus control technology according to claim 1 is characterized in that: It also includes an intrinsically safe power supply and a switching power supply. The intrinsically safe power supply supplies power for the dust sensor, differential pressure sensor and pressure transmitter, and the switching power supply supplies power for the solenoid valve controller, pneumatic solenoid valve and the control circuit in the dry dust collector control box.

6. A method for controlling an electronically controlled dry dust collector based on bus control technology as described in any one of claims 1 to 5, characterized in that: The following steps are involved: The dust sensor is used to detect the dust concentration in the working environment. When the dust concentration reaches the starting threshold of the exhaust fan, the dry dust collector control box automatically controls the exhaust fan to start, realizing the dust linkage dust removal function. The pressure difference sensor is used to detect the pressure difference between the air inlet and the air outlet. When the pressure difference increases to the threshold of automatic dust cleaning, the dry dust collector control box controls each solenoid valve controller in turn through the CAN bus; the solenoid valve controller starts the controlled pneumatic solenoid valve in turn, and then drives the pneumatic pulse valve to perform dust cleaning operation; The cleaning operation detects the pressure of the cleaning air bag through the pressure transmitter. Each time a pneumatic solenoid valve is started, the inflation time is determined according to the pressure of the cleaning air bag. When the air pressure reaches the set cleaning air pressure value, the next pneumatic solenoid valve is started until the automatic cleaning is completed. The status of the pneumatic pulse valve and coil is judged based on the pressure change of the cleaning air bag. If there is no obvious change in the pressure of the cleaning air bag after the system sends a pneumatic solenoid valve start signal, it is considered that the cleaning operation of this route has a fault.

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