A mining vehicle air filter assembly and back-blowing control method thereof

Abstract

The invention discloses an air filter assembly for a mining vehicle and a back-blowing control method thereof, belonging to the technical field of air filters, and comprising a pre-filter, a filtering back-blowing system and a dust suction system; the filtering back-blowing system comprises an air filter and a back-blowing air storage tank; the air filter comprises a filter housing, an air filter element and a safety filter element are arranged inside the filter housing, and an annular channel is formed between the air filter element and the safety filter element; the filter housing is provided with a filter air inlet and a filter dust outlet connected to the pre-filter air outlet on the upper and lower sides, respectively, and a filter air outlet is arranged on one end face of the filter housing; the back-blowing air storage tank is connected to the annular channel through a back-blowing air inlet pipe; the dust suction system comprises a dust removal pump, and the dust removal pump inlet is connected to the filter dust outlet. The closed air filter avoids external influences; has a high degree of integration and reduces space occupation; realizes automatic back-blowing of the air filter element, intelligently judges the maintenance time, reduces the cost of manual maintenance, and reduces the risk of filter element damage and secondary pollution.

Description

Technical Field

[0001] The invention belongs to the technical field of air filters, in particular to an air filter assembly for a mining vehicle and a back-blowing control method thereof. Background Art

[0002] Air filters are mainly used for air filtration in engineering locomotives, automobiles, agricultural locomotives, laboratories, sterile operating rooms and various precision operating rooms.

[0003] The contradiction between the heavy dust environment in the mining area and the limited dust capacity of the air filter system of mining vehicles (engine air intake volume, filtration efficiency and pressure drop requirements, and layout space limitations) leads to the problem of frequent maintenance of the air intake system and non-standardization, non-intelligence and automation of air filter maintenance.

[0004] Non-standard maintenance can easily damage the filter element, which can easily cause the risk of secondary dust inflow into the pipeline. At the same time, when some users replace the air filter element, due to their low awareness of the quality of the air filter element, they may choose a filter element of poor quality and poor adaptability for assembly and use, which ultimately leads to low air filter efficiency and short life; non-intelligent maintenance can easily lead to improper maintenance timing; non-automatic maintenance not only leads to high frequency of parking for maintenance, but also cumbersome operation, high maintenance costs, and reduced operating efficiency. In addition, the traditional air filter element is directly connected to the atmosphere and is seriously affected by the external environment and weather. Summary of the invention

[0005] To solve the above problems, the present invention provides an air filter assembly for a mining vehicle and a backblowing control method thereof. The air filter is of a closed design, which effectively avoids the influence of the external environment and weather; and the pre-filter, filter backblowing system and dust suction system are all integrated and installed on the bracket assembly, which can effectively reduce the space occupancy and has high integration; and the air filter element can realize fully automatic backblowing maintenance, intelligently judge the maintenance time of the air filter, reduce the manual maintenance cost, and also reduce the risk of filter element damage and secondary pollution.

[0006] On the one hand, the present invention is achieved through the following technical solutions:

[0007] An air filter assembly for a mining vehicle comprises a pre-filter, a filter back-blowing system and a dust collection system which are sequentially installed from top to bottom through a bracket assembly; the pre-filter is a cyclone centrifugal structure, comprising a pre-filter air inlet and a pre-filter air outlet which are opened downward;

[0008] The filter back-blowing system includes an air filter and a back-blowing air storage tank arranged in an upper and lower position; the air filter includes a filter housing of a horizontal cylindrical housing structure, a cylindrical air filter element and a safety filter element are arranged inside the filter housing, and an annular channel is formed between the air filter element and the safety filter element; a filter air inlet and a filter dust outlet connected to the pre-filter air outlet are respectively arranged on the upper and lower sides of the circumferential side wall of the filter housing, and a filter air outlet that can be connected to the engine inlet is arranged on one end face of the filter housing; the back-blowing air storage tank is connected to the annular channel through a back-blowing air inlet pipe;

[0009] The dust collection system comprises a dust removal pump, and the dust removal pump inlet is connected with the dust discharge port of the filter.

[0010] A further improvement of the present invention is that the pre-filter comprises a pre-filter housing in the shape of a vertical cylindrical shell, in which centrifugal blades are rotatably installed along the axis of the pre-filter housing; a pre-filter dust outlet is provided on the circumferential side of the pre-filter housing; the pre-filter air inlet and the pre-filter air outlet are arranged on the lower end surface of the pre-filter housing, and the pre-filter air outlet is located at the center position, and the pre-filter air inlet is evenly distributed in a ring shape around the periphery.

[0011] A further improvement of the present invention is that a rear cover is provided on the other end face of the filter housing; an identification chip is provided on the air filter element, and an identification module corresponding to the identification chip is provided on the rear cover.

[0012] A further improvement of the present invention is that a negative pressure sensor is provided on the air outlet of the filter.

[0013] A further improvement of the present invention is that a pressure reducing valve is installed on the back-blowing air intake pipe.

[0014] A further improvement of the present invention is that a back-blowing solenoid valve is installed at the outlet of the back-blowing gas storage tank, and a back-blowing controller capable of controlling the opening and closing of the back-blowing solenoid valve is also installed in the back-blowing gas storage tank.

[0015] A further improvement of the present invention further comprises a control panel capable of controlling the backflush mode and the negative pressure value.

[0016] Another aspect of the present invention is achieved through the following technical solutions:

[0017] A backflush control method for an air filter assembly of a mining vehicle comprises the following steps:

[0018] Step 1: When the negative pressure sensor reaches the set negative pressure value and the engine is in a shutdown state, the control panel sends a signal to the blowback controller;

[0019] Step 2: The identification module detects the identification chip through wireless communication, reads the identification chip information and transmits it to the backflush controller;

[0020] Step 3: After the backflush controller recognizes the information correctly, it controls the backflush solenoid valve to open. After the high-pressure gas in the backflush gas storage tank is depressurized by the pressure reducing valve, it enters the annular airway through the backflush air intake pipe and fills the entire annular airway, forming a backflush airflow from inside to outside, so that the dust on the air filter element falls off;

[0021] Step 4: The fallen dust is sucked out through the dust suction pipe along with the back-blowing airflow and then pumped out through the dust exhaust pipe.

[0022] It can be seen from the above technical solutions that the beneficial effects of the present invention are:

[0023] The back-blowing controller is used to control the high-pressure gas in the back-blowing air tank to fill the annular channel in the air filter in a short time, forming a back-blowing airflow from the inside to the outside, so that the dust on the outer surface of the air filter element falls off, realizing fully automatic maintenance, reducing the cost of manual maintenance, and also reducing the risk of filter element damage and secondary pollution caused by manual maintenance; the maintenance time of the air filter is intelligently judged by the negative pressure value of the negative pressure sensor; the identification module is used to identify the information of the identification chip on the air filter element, and the function of automatically clearing the dust on the air filter element can be executed after the information is determined to be correct, so that the authenticity of the air filter element can be effectively identified, prompting users to correctly use genuine air filters and effectively protect the engine; the air filter element is completely wrapped by the filter housing and the rear cover, which can protect the performance of the air filter element from the influence of the environment and weather. In addition, the pre-filter, filter back-blowing system and dust collection system are all integrated and installed on the bracket assembly, which can effectively reduce space occupancy and have high integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of a pre-filter according to a specific embodiment of the present invention.

[0027] Figure 3 It is a schematic structural diagram of a filtering backflushing system according to a specific embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of the internal structure of an air filter according to a specific embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of a control panel according to a specific embodiment of the present invention.

[0030] Figure 6 It is a schematic structural diagram of a dust collection system according to a specific embodiment of the present invention.

[0031] Figure 7 It is a schematic diagram of the structure of the bracket assembly according to a specific embodiment of the present invention.

[0032] Figure 8 It is a schematic diagram of the control principle of a specific implementation mode of the present invention.

[0033] In the attached figure: 1. pre-filter, 2. filter back-blowing system, 3. dust suction system, 4. bracket assembly, 5. pre-filter housing, 6. pre-filter dust exhaust port, 7. pre-filter air inlet, 8. pre-filter air outlet, 9. centrifugal blades, 10. air filter, 11. negative pressure sensor, 12. pressure reducing valve, 13. back-blowing solenoid valve, 14. back-blowing controller, 15. back-blowing air tank, 16. control panel, 17. identification chip, 18. identification module, 19. back cover, 20. filter housing, 21. air filter element, 22. filter air inlet, 23. annular channel, 24. filter air outlet, 25. back-blowing air inlet pipe, 26. filter dust exhaust port, 27. dust removal pump, 28. dust suction pipe, 29. dust exhaust pipe. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0035] like Figure 1-7 As shown, the present invention discloses an air filter assembly for a mining vehicle, comprising a pre-filter 1, a filter back-blowing system 2 and a dust collection system 3 which are sequentially installed from top to bottom through a bracket assembly 4; the pre-filter 1 is a cyclone centrifugal structure, comprising a pre-filter air inlet 7 and a pre-filter air outlet 8 which open downward;

[0036] The filtering back-blowing system 2 includes an air filter 10 and a back-blowing air storage tank 15 arranged in an upper and lower position; the air filter 10 includes a filter housing 20 of a horizontal cylindrical housing structure, a cylindrical air filter element 21 and a safety filter element are arranged inside the filter housing 20, and an annular channel 23 is formed between the air filter element 21 and the safety filter element; the filter housing 20 is provided with a filter inlet 22 and a filter dust outlet 26 connected to the pre-filter outlet 8 on the upper and lower sides of the circumferential side wall, respectively, and the filter inlet 22 is connected to the pre-filter outlet 8 through a flexible hose; a filter outlet 24 that can be connected to the engine inlet is provided on one end face of the filter housing 20; the back-blowing air storage tank 15 is connected to the annular channel 23 through a back-blowing air inlet pipe 25;

[0037] The dust removal system 3 includes a dust removal pump 27, the inlet of the dust removal pump 27 is connected to the filter dust exhaust port 26 through a dust suction pipe 28, the outlet of the dust removal pump 27 is connected to a dust exhaust pipe 29, the dust exhaust pipe 29 is fixed to the bracket assembly 4 through an L-shaped bracket, and the dust removal pump 27 is arranged on the side of the backblowing air tank 15.

[0038] When the air filter assembly is working normally, the outside air enters the pre-filter 1 through the pre-filter air inlet 7, and the air after centrifugal separation enters the air filter 10 through the pre-filter air outlet 8 and the filter air inlet 22, and is filtered by the air filter element 21 and the safety filter element in the air filter 10, and enters the engine through the filter air outlet 24, and is filtered by the pre-filter 1 and the air filter 10, so as to ensure the cleanliness of the engine air intake. When the air filter element 21 is seriously blocked and the engine is in the shutdown state, the back-blowing air storage tank 15 blows high-pressure gas into the annular airway 23 through the back-blowing air inlet pipe 25, forming a back-blowing airflow from the inside to the outside, so that the dust on the air filter element 21 falls off; the fallen dust is sucked out through the dust suction pipe 28 and the dust removal pump 27 along with the back-blowing airflow, and is discharged through the dust exhaust pipe 29; thereby achieving a good back-blowing cleaning effect of the air filter 10 and avoiding the risk of secondary dust entry. The overall structure is simple and easy to use. The air filter 10 is a closed design, which effectively avoids the influence of the external environment and weather. The pre-filter 1, the filter backflush system 2 and the dust collection system 3 are all integrated and installed on the bracket assembly 4, which can effectively reduce space occupancy and has high integration.

[0039] The safety filter has two functions: 1. It acts as a backup filter in special cases where the air filter 21 is damaged or improperly installed. Such damage may not be obvious and cannot be easily identified. It may be caused during operation or maintenance of the filter. In addition, there are also cases where the air filter 21 is not properly installed and cannot achieve a good seal. 2. It protects the engine and prevents dirt and other impurities from entering the clean air side of the intake system when the air filter 21 is removed during maintenance.

[0040] Among them, the backblowing air storage tank 15 has a volume of 20L, a storage pressure of not less than 0.5MPa, and a working pressure of 0.6MPa-1.0MPa; the backblowing air storage tank 15 is provided with a pressure regulating valve 0MPa-1.0MPa and a pressure relief valve 1.0MPa. When the pressure of the backblowing air storage tank 15 is less than the pressure of the pressure regulating valve, the backblowing air storage tank 15 is inflated, and when the pressure is greater than the pressure of the pressure relief valve, the pressure relief valve opens to release the pressure.

[0041] like Figure 2 As shown, the pre-filter 1 includes a pre-filter housing 5 in the shape of a vertical cylindrical housing, and a centrifugal blade 9 is installed in the pre-filter housing 5 along its axis; a pre-filter dust outlet 6 with a shutter structure is provided on the circumferential side of the pre-filter housing 5; the pre-filter air inlet 7 and the pre-filter air outlet 8 are arranged on the lower end surface of the pre-filter housing 5, and the pre-filter air outlet 8 is located at the center position, and the pre-filter air inlet 7 is evenly distributed in a ring around the surrounding positions. Air is sucked in through the pre-filter air inlet 7 on the outer ring of the lower end surface of the pre-filter housing 5, and the centrifugal blade 9 rotates to centrifugally separate the air, and the dust is discharged to the outside through the pre-filter dust outlet 6, and the first-stage filtered air enters the air filter 10 through the pre-filter air outlet 8.

[0042] like Figure 3 As shown, the other end face of the filter housing 20 is provided with a rear cover 19; the air filter element 21 is provided with an identification chip 17, and the rear cover 19 is provided with an identification module 18 corresponding to the identification chip 17. The distance between the identification module 18 and the identification chip 17 is no more than 100 mm. The identification module 18 reads the authenticity information of the identification chip 17 through wireless communication to ensure the use of genuine air filter element 21, effectively protect the engine, and ensure that the air filter element 21 can filter efficiently. The rear cover 19 is detachably connected to the filter housing 20 through a buckle assembly, so as to achieve a good seal of the air filter element 21 and facilitate the disassembly, assembly and replacement of the air filter element 21.

[0043] Among them, a negative pressure sensor 11 is provided on the filter outlet 24. The negative pressure value detected by the negative pressure sensor 11 can determine the blockage of the air filter element 21, so that the air filter element 21 can be back-blown or replaced in time, achieving efficient filtration of the air filter 10 and ensuring reliability and intelligent detection of use.

[0044] Among them, a pressure reducing valve 12 is installed on the back-blowing air intake pipe 25. Since the air pressure of the back-blowing air storage tank 15 is relatively high, the air enters the annular channel 23 after being reduced in pressure by the pressure reducing valve 12 to back-blow and clean the air filter element 21, avoiding excessive airflow impact on the air filter element 21 and ensuring safety in use.

[0045] Among them, a back-blowing solenoid valve 13 is installed at the outlet of the back-blowing gas storage tank 15, and a back-blowing controller 14 capable of controlling the opening and closing of the back-blowing solenoid valve 13 is also installed in the back-blowing gas storage tank 15. By automatically controlling the closing of the back-blowing solenoid valve 13 through the back-blowing controller 14, the automation and efficiency of the back-blowing effect can be realized, without excessive manual operation, ensuring the convenience of use and saving manpower. The working voltage of the back-blowing solenoid valve 13 is 24V DC, normally closed, and the working pressure is 0.6MPa-1.2MPa. The working voltage of the back-blowing controller 14 is 24VDC, the control output is 24V 2A, the working temperature is -40℃-85℃, and the protection level is IP67.

[0046] The back-blowing gas storage tank 15 , the back-blowing solenoid valve 13 , the pressure reducing valve 12 , and the back-blowing air intake pipe 25 are sequentially connected through a rubber hose, and the back-blowing solenoid valve 13 and the identification module 18 are both electrically connected to the back-blowing controller 14 .

[0047] Among them, a control panel 16 is provided in the vehicle cab (or integrated on the cab instrument panel). The functions of the control panel 16 include setting the negative pressure value and switching the back-blowing mode. There are two back-blowing modes: automatic mode and manual mode. The control panel 16 has 4 buttons "D", "M", "+", and "-". Pressing the "D" button can back-blow in the automatic mode (pressing the "D" button in the manual mode is invalid), pressing the "M" button can switch between the automatic mode and the manual mode, and pressing the "+" and "-" buttons can set the negative pressure value. The back-blowing controller 14 analyzes the data returned by the negative pressure sensor 11, converts it into a negative pressure value and displays it on the control panel 16. The control panel 16 sends out lights such as normal resistance, high resistance, and resistance exceeding the limit according to the specific negative pressure value to prompt the driver.

[0048] The present invention also discloses a back-blowing control method for an air filter assembly of a mining vehicle, comprising the following steps:

[0049] Step 1: When the negative pressure sensor 11 reaches the set negative pressure value and the engine is in a shutdown state, the operation control panel 16 transmits a signal to the blowback controller 14;

[0050] Step 2: The identification module 18 detects the identification chip 17 by wireless communication, reads the information of the identification chip 17 and transmits it to the backflush controller 14;

[0051] Step 3: After the back-blowing controller 14 recognizes that the information is correct, it controls the back-blowing solenoid valve 13 to open, and the high-pressure gas in the back-blowing gas storage tank 15 is depressurized by the pressure reducing valve 12, and then enters the annular air passage 23 through the back-blowing air intake pipe 25, and fills the entire annular air passage 23, forming a back-blowing airflow from the inside to the outside, so that the dust on the air filter element 21 falls off;

[0052] Step 4: The fallen dust is sucked out by the dust removal pump 27 through the dust suction pipe 28 along with the back-blowing airflow, and discharged through the dust exhaust pipe 29.

[0053] Backflush has automatic mode and manual mode:

[0054] Automatic mode: When the negative pressure sensor 11 reaches the set negative pressure value and the vehicle key switch is in the power-off condition, press the control panel key "M". After the back-blowing controller 14 receives the action signal, it automatically reads the information of the identification chip 17, and after the information is determined to be correct, it drives the back-blowing solenoid valve 13 to open for 3 seconds and drives the dust removal pump 27 to work for 15 seconds.

[0055] Manual mode: After the action signal is manually provided, the information of the identification chip 17 is automatically read, and after determining that the information is correct, the back-blowing solenoid valve 13 is driven to open for 3 seconds, and the dust removal pump 27 is driven to work for 15 seconds. (This mode is not limited by the negative pressure value).

[0056] The air filter assembly for mining vehicles and its back-blowing control method use a back-blowing controller to control the high-pressure gas in the back-blowing air tank to fill the annular channel in the air filter in a short time, forming a back-blowing airflow from the inside to the outside, so that the dust on the outer surface of the air filter element falls off, realizing full-automatic maintenance, reducing the cost of manual maintenance, and also reducing the risk of filter element damage and secondary pollution caused by manual maintenance; the maintenance time of the air filter is intelligently judged by the negative pressure value of the negative pressure sensor; the identification module is used to identify the information of the identification chip on the air filter element, and the function of automatically removing dust on the air filter element can be executed after the information is determined to be correct, so that the authenticity of the air filter element can be effectively identified, prompting users to correctly use genuine air filter elements, and effectively protecting the engine; the air filter element is completely wrapped by the filter housing and the rear cover, which can protect the performance of the air filter element from the influence of the environment and weather. In addition, the pre-filter, the filter back-blowing system and the dust collection system are all integrated and installed on the bracket assembly, which can effectively reduce the space occupation and have high integration.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0058] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0059] 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. A mining vehicle air filter assembly, characterized in that: The invention comprises a pre-filter (1), a filter back-flushing system (2) and a dust collection system (3) which are sequentially installed from top to bottom through a bracket assembly (4); the pre-filter (1) is a cyclone centrifugal structure, comprising a pre-filter air inlet (7) and a pre-filter air outlet (8) which open downward; The filter back-blowing system (2) comprises an air filter (10) and a back-blowing air storage tank (15) arranged in an upper and lower position; the air filter (10) comprises a filter housing (20) of a horizontal cylindrical housing structure, a cylindrical air filter element (21) and a safety filter element are arranged inside the filter housing (20), and an annular channel (23) is formed between the air filter element (21) and the safety filter element; a filter air inlet (22) and a filter dust outlet (26) connected to a pre-filter air outlet (8) are respectively arranged on the upper and lower sides of the circumferential side wall of the filter housing (20), and a filter air outlet (24) capable of being connected to an engine inlet is arranged on one end surface of the filter housing (20); the back-blowing air storage tank (15) is connected to the annular channel (23) via a back-blowing air inlet pipe (25); The dust collection system (3) comprises a dust removal pump (27), and the inlet of the dust removal pump (27) is connected to the dust discharge port (26) of the filter; A rear cover (19) is provided on the other end surface of the filter housing (20); an identification chip (17) is provided on the air filter element (21), and an identification module (18) corresponding to the identification chip (17) is provided on the rear cover (19); A negative pressure sensor (11) is provided on the filter air outlet (24); Also included is a control panel (16) capable of controlling the backflush mode and negative pressure value.

2. The mining vehicle air filter assembly according to claim 1, characterized in that: The prefilter (1) comprises a prefilter housing (5) in the shape of a vertical cylindrical housing, wherein a centrifugal blade (9) is rotatably mounted in the prefilter housing (5) along its axis; a prefilter dust discharge port (6) is provided on the circumferential side surface of the prefilter housing (5); a prefilter air inlet (7) and a prefilter air outlet (8) are arranged on the lower end surface of the prefilter housing (5), and the prefilter air outlet (8) is located at the center, and the prefilter air inlet (7) is evenly distributed in an annular manner at the surrounding positions.

3. The mining vehicle air filter assembly according to claim 1, characterized in that: A pressure reducing valve (12) is installed on the back-blowing air intake pipe (25).

4. The mining vehicle air filter assembly according to claim 1, characterized in that: A back-blowing solenoid valve (13) is installed at the outlet of the back-blowing gas storage tank (15), and a back-blowing controller (14) capable of controlling the opening and closing of the back-blowing solenoid valve (13) is also installed in the back-blowing gas storage tank (15).

5. A backflush control method for an air filter assembly of a mining vehicle, characterized in that: The steps include: Step 1: When the negative pressure sensor (11) reaches a set negative pressure value and the engine is in a shutdown state, the operation control panel (16) transmits a signal to the blowback controller (14); Step 2: The identification module (18) detects the identification chip (17) by wireless communication, reads the information of the identification chip (17) and transmits it to the backflush controller (14); Step 3: After the backflush controller (14) recognizes that the information is correct, it controls the backflush solenoid valve (13) to open, and the high-pressure gas in the backflush gas storage tank (15) is depressurized by the pressure reducing valve (12), and then enters the annular channel (23) through the backflush air intake pipe (25), and fills the entire annular channel (23), forming a backflush airflow from the inside to the outside, so that the dust on the air filter element (21) falls off; Step 4: The fallen dust is sucked out by the dust removal pump (27) through the dust suction pipe (28) along with the back-blowing airflow, and discharged through the dust exhaust pipe (29).

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