CN112228257A - Reverse blowing type air filter for engineering machinery and engineering machinery equipment - Google Patents

Reverse blowing type air filter for engineering machinery and engineering machinery equipment Download PDF

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Publication number
CN112228257A
CN112228257A CN202011104930.3A CN202011104930A CN112228257A CN 112228257 A CN112228257 A CN 112228257A CN 202011104930 A CN202011104930 A CN 202011104930A CN 112228257 A CN112228257 A CN 112228257A
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CN
China
Prior art keywords
air
filter
valve
cylinder
inlet
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Pending
Application number
CN202011104930.3A
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Chinese (zh)
Inventor
赵绍兴
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赵绍兴
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Priority to CN202011104930.3A priority Critical patent/CN112228257A/en
Publication of CN112228257A publication Critical patent/CN112228257A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02Air cleaners
    • F02M35/08Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/086Dust removal by flushing, blasting, pulsating or aspirating flow, washing or the like; Mechanical dust removal, e.g. by using scrapers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02Air cleaners
    • F02M35/0201Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02Air cleaners
    • F02M35/024Air cleaners using filters, e.g. moistened
    • F02M35/02416Fixing, mounting, supporting or arranging filter elements; Filter element cartridges

Abstract

The invention relates to the technical field of automobile auxiliary components, in particular to a back-blowing type air filter for engineering machinery. The air filtering device comprises a shell, a filter element and an air outlet cylinder, wherein the shell, the filter element and the air outlet cylinder are arranged from outside to inside, the filter element is in a cylindrical shape, and the air outlet cylinder is arranged at the bottom of the shell. The filter element is cleaned by automatic back flushing through the back flushing device, frequent disassembly and washing are avoided, and working efficiency is improved; the air storage cylinder is annular and is sleeved on the air outlet cylinder, so that the overall occupied space of the device is reduced, and the arrangement on the whole vehicle is facilitated; the air pressure protection valve is arranged, so that the problem that the air storage cylinder is inflated to prolong the boosting time of the air passage of the whole engine is avoided when the whole engine is started, and the national standard is met; when the air storage cylinder performs back flushing operation, the thrust spring pushes the diaphragm to close the check valve, and the phenomenon that the pressure fluctuation of the air passage of the whole vehicle is too large is avoided.

Description

Reverse blowing type air filter for engineering machinery and engineering machinery equipment
Technical Field
The invention relates to the technical field of automobile auxiliary components, in particular to a reverse blowing type air filter for engineering machinery.
Background
Modern automobile engines use paper core air filters more and more commonly, and during maintenance, dust and dirt attached to the surfaces of the paper filter cores are removed by a vibration method, a soft brush method (brushing along wrinkles) or a compressed air reverse blowing method.
The inventors have found that there are problems with the following prior art methods of cleaning filter elements.
1. The most common compressed air blowback scheme is after disassembling out the filter core, beat gently first then utilize the compressed air of air compressor machine or vehicle to carry out the blowback in the filter core inside to reach the clean ventilative effect of surface with the filter core. The paper filter element can be damaged by taking little attention, energy is wasted by utilizing compressed air for back blowing, secondary dust pollution to the surrounding environment is caused, the environment is not favorable for environmental protection, and if filter paper of the filter element is damaged, the filter paper needs to be directly replaced, so that great waste is caused; even if the filter core can be carefully maintained each time, the original performance of the paper filter core cannot be completely recovered, and the air inlet resistance of the paper filter core is increased, so that the paper filter core is replaced by a new filter core when the paper filter core needs to be maintained for 4 th time. If the paper filter element has the problems of breakage, perforation or degumming of the filter paper and the end cover, the paper filter element needs to be replaced immediately, and waste is caused.
2. Waste ejection dust exhaust: the speed and the flow of the exhaust gas of the exhaust pipe are utilized to suck impurities in the air filter into the exhaust pipe for discharging, and the purpose of automatic dust exhaust is achieved.
The structure of the mode is as follows: the steel pipe, the check valve and the exhaust pipe are partially changed. High cost, complex structure and difficult maintenance. The dust extraction effect is reduced under the condition of small exhaust airflow, and the pipeline must resist high temperature, so the rust prevention cost is high. Resulting in high production cost. Not only the exhaust effect of the engine is influenced, but also the dust extraction effect is unstable. The invisible cost of later maintenance and operation can not be reduced.
3. Other blowback structures in market: a special air storage tank is arranged outside the air filter, and compressed air is output by conducting the electromagnetic valve to enter a back-blowing nozzle or high-pressure air is directly used for blowing the filter element. But the body length of blowback explosion head is too big, leads to empty filter volume increase, and the installation respectively of gas holder and filter moreover, spare part is in large quantity when arousing the field installation, and the installation performance and the sealing performance of joint can't be guaranteed, in addition the inconsistent condition of personnel's quality for gas leakage and the insecure hidden danger of connection can't predict more. Resulting in difficulty in use and maintenance for the customer and increased product instability. Causing customer dissatisfaction. But also results in shorter working times, increased maintenance times and reduced service life.
In addition, the existing products do not consider the air path of the motor vehicle, and the high-pressure air input into the air storage cylinder is not limited, so that the air volume required by back flushing air is in competition with the air volume of the working air path of the whole vehicle. The phenomena of reduction of working air pressure of an air path of the whole automobile, alarm of an air pressure indicating lamp, unsafe driving and unreliable braking are easily caused. Especially, the requirement that the indicated air pressure of an air pressure gauge is increased from zero to starting air pressure in 4min) of a motor vehicle adopting air pressure braking at 7.7.2 th in GB7258-2017 motor vehicle operation safety technical condition that the national standard is difficult to meet
No matter what kind of filter blowback structure of above several kinds of forms uses, also corresponding increase of trouble, maintenance cost and cost, utilize former car compressed air to blow air cleaner waste energy when to the maintenance. Even have automatic dust removal effect, the integrated level is too poor, and automatic dust blowing effect is not good, increases later stage running cost and cost of maintenance moreover, to the air intake resistance of original vehicle or equipment, key equipment such as engine still have the hidden danger that causes the influence of admitting air, reduces engine power and effectively exerts.
Disclosure of Invention
The invention aims to provide a back-blowing type air filter for engineering machinery, which is used for solving the technical problems. And an air inlet pipeline is provided with an air pressure protection valve, so that the phenomenon that the pressure fluctuation of the air circuit of the whole vehicle is overlarge is avoided, and the requirements of the national standard GB7258-2017 technical conditions for the running safety of motor vehicles are met.
In particular to a back-blowing type air filter for engineering machinery, which comprises an air filtering device, wherein the air filtering device is communicated with the external air and the air path of an engine and is provided with a back-blowing device,
the back-blowing device comprises an air inlet pipe, an air storage cylinder, an air guide pipe and a back-blowing nozzle which are connected in sequence, and the back-blowing nozzle is arranged in the air filtering device;
the air inlet pipe is provided with an air pressure protection valve.
In a further improvement, the air filtering device comprises a shell, a filter element and an air outlet cylinder from outside to inside,
the filter element is in a cylindrical shape, a clean air chamber is formed in the filter element, and an air outlet cylinder is arranged at the bottom of the shell. The outlet cylinder is used for being connected with an engine gas circuit.
The shell is of a double-layer structure and comprises an inner wall and an outer wall, the outer side of the filter element is in contact with the inner wall of the shell, and the inner wall is provided with through holes or adopts a net structure.
In a further improvement, the air outlet cylinder supports the housing and is in communication with the clean air chamber; the bottom wall of the shell outside the air outlet cylinder is provided with an air inlet, and the opening of the air inlet is downward.
In a further improvement, the outer wall of the air outlet barrel is provided with a longitudinal ribbed plate, and the top end of the ribbed plate supports the shell.
In a further improvement, the air cylinder is annular and is sleeved on the outer wall of the air outlet cylinder, and the axis of the air cylinder coincides with the axis of the air outlet cylinder.
In a further improvement, one side of the air storage cylinder is provided with a high-pressure air inlet pipe, the other side of the air storage cylinder is provided with an air guide pipe, and the air guide pipe penetrates through the cylinder wall of the air outlet cylinder and enters the inside of the filtering part.
The improvement is that the air duct is provided with an electromagnetic valve, and the tail end of the air duct is provided with the back flushing nozzle;
the blowback shower nozzle is towards clean air cavity to can dismantle the connection through setting up the connecting piece between with the air duct.
In a further improvement, the air pressure protection valve is in an open state when the air path of the whole machine is under working pressure, and is in a closed state when the air path of the whole machine is less than the working pressure.
The air pressure protection valve is further improved to be provided with an inlet and an outlet, wherein the inlet is communicated with an air path of the whole vehicle, and the outlet is communicated with an air inlet pipe of the air storage cylinder;
a one-way valve is arranged between the inlet and the outlet, the one-way valve comprises a U-shaped valve body and a valve seat, and the U-shaped valve body and the valve seat can slide relatively; a cavity is arranged in the valve seat, and a first thrust spring is arranged in the cavity to support the U-shaped valve body and is communicated with the inlet;
and a diaphragm is arranged opposite to the U-shaped valve body and supported by a second thrust spring in the other cavity.
In a further improvement, the bottom of the valve body of the one-way valve is provided with a small hole, the small hole is controlled to be opened and closed by a bypass valve, and the bypass valve comprises a bypass valve body and a third thrust spring for supporting the bypass valve body.
The invention also provides engineering machinery equipment comprising the reverse blowing type air filter for the engineering machinery.
Compared with the prior art, the beneficial effect of above one or more technical scheme:
(1) the automatic back flushing of the filter element is cleaned by arranging the back flushing device, frequent washing or replacement is avoided, the working efficiency is improved, and materials are saved.
(2) The gas outlet cylinder plays a role in supporting the shell while playing a role in passing through gas, a plurality of longitudinal ribbed plates are arranged on the outer side of the gas outlet cylinder, and the top ends of the ribbed plates support the bottom wall of the shell. The air outlet cylinder plays a role in ventilation and supporting at the same time, so that part of the bracket is saved, and the structure is simplified.
(3) The casing is for adopting bilayer structure, forms inside cavity formation air inlet chamber between outer wall and the inner wall, sets up the array through-hole or adopts network structure with the inner wall of filter core contact, and the air passes through casing diapire air inlet and gets into behind the air inlet chamber, and the rethread filter core, air can fully get into the filter core at shells inner wall, are favorable to the filter capacity of full play filter core.
(4) Because the air storage cylinder is annular and is sleeved on the air outlet cylinder, the space around the air outlet cylinder is fully utilized, the occupied space of the whole device is reduced, and the arrangement on the whole vehicle is facilitated.
(5) The air pressure protection valve is arranged, when the engine of the whole engine is started, the air storage cylinder is not communicated, and the air path of the whole engine is normally boosted, so that the problem that the air storage cylinder is inflated to prolong the boosting time of the air path of the whole engine is avoided, and the national standard is met; when the air storage cylinder performs back flushing operation, the thrust spring pushes the diaphragm to close the check valve, and the phenomenon that the pressure fluctuation of the air passage of the whole vehicle is too large is avoided.
(6) By adding the bypass valve structure, unnecessary opening and closing of the one-way valve caused by air leakage failure of the back flushing air path are avoided.
Drawings
Fig. 1 is a schematic front view of a blowback air cleaner for construction machinery according to embodiment 1 of the present invention;
fig. 2 is a schematic front view of a blowback air cleaner for construction machinery according to embodiment 2 of the present invention;
fig. 3 is an exploded schematic view of a blowback air cleaner for construction machinery according to embodiment 2 of the present invention;
fig. 4 is a schematic structural view of an air pressure protection valve of a reverse blowing type air cleaner for construction machinery according to embodiment 2 of the present invention;
fig. 5 is a schematic structural view of an air pressure protection valve of a reverse blowing type air cleaner for construction machinery according to embodiment 3 of the present invention;
in the figure:
the device comprises a shell 1, a filter element 2, an air inlet chamber 3, an electromagnetic valve 4, an air guide pipe 5, a connecting bracket 6, a mounting bottom plate 7, an air outlet cylinder 8, a controller 9, an air storage cylinder 10, a high-pressure air inlet pipe 11, an air pressure protective valve 12, a connecting piece 13, an air inlet 14, a back-flushing sprayer 15 and a clean air chamber 16;
20 one-way valve, 21 inlet, 22 outlet, 23 first U-shaped cylinder, 24 second U-shaped cylinder, 25 through hole, 26 diaphragm and 27 thrust spring.
Detailed Description
Example 1
A first embodiment of the present invention provides a blowback air cleaner for construction machinery, as shown in fig. 1, which includes an air filtering device and a blowback device, wherein the air filtering device communicates external air with an air passage of an engine, and the external air is filtered by the air filtering device and then supplied to the engine. The back-blowing device can provide reverse high-pressure air to the inside of the air filtering device, and blow out particles attached to the filter element.
As shown in fig. 1, the air filter device includes a housing 1 and a filter element 2 from outside to inside. The housing 1 is in the form of an inverted bucket, the bottom of which also has a bottom wall. The filter element, surrounded by the housing, is cylindrical with an annular cross-section and defines a clean air chamber 16 therein. One end of the air outlet cylinder 8 penetrates through the bottom wall of the shell to be communicated with the filter element, and the other end of the air outlet cylinder 8 is communicated with an air inlet pipeline of the engine.
The gas outlet cylinder 8 plays a role of supporting the shell while playing a role of passing gas. Specifically, a plurality of longitudinal rib plates are arranged on the outer side of the air outlet cylinder 8, and the top ends of the rib plates support the bottom wall of the shell. The air outlet cylinder plays a role in ventilation and supporting at the same time, so that part of the bracket is saved, and the structure is simplified.
Set up air inlet 14 at the casing diapire with the contact of play air cylinder 8, the air inlet opening is downward, when sleet weather, prevents that precipitation from getting into inside the casing, soaks the filter core.
In order to make can be as much as possible behind the air admission casing filter through the filter core, casing 1 is for adopting bilayer structure, forms inside cavity formation air intake chamber between outer wall and the inner wall, and the inner wall with the filter core contact sets up the array through-hole or adopts network structure, and the air passes through casing diapire air inlet and gets into behind the air intake chamber 3, rethread filter core 2, and the air can fully get into the filter core at shells inner wall, is favorable to the filter capacity of full play filter core.
As shown in fig. 1, the back-blowing device includes a high-intake pipe 11, an air reservoir 10, an air duct 5, and a back-blowing nozzle 15 connected in sequence, and the back-blowing nozzle 15 is disposed inside the air filtering device.
The air cylinder 10 is annular and is sleeved on the outer wall of the air outlet cylinder 8, and the axis of the air cylinder coincides with the axis of the air outlet cylinder. The blowback nozzle 15 is a cavity structure with a blowing hole and is arranged at the axis position of the air storage cylinder.
One side of the air storage cylinder is communicated with a high-pressure air inlet pipe 11, the other side of the air storage cylinder is communicated with an air guide pipe 5, and the air guide pipe 5 penetrates through the wall of the air outlet cylinder and enters the inside of the filtering part. The air duct is provided with an electromagnetic valve 4 controlled by a controller 9, and the blowback nozzle 15 is arranged at the tail end of the air duct 5. The blowback nozzle 15 faces the clean air chamber 16 and is detachably connected with the air duct by arranging a connecting piece 13. The air cylinder 10 is supported by the connecting bracket 6, and the connecting bracket 6 is fixedly installed on the installation bottom plate 7. The controller 9 includes a power supply control module, an output module, an input module, a CPU module, a logic control module, and the like to implement control functions.
Because the air cylinder 10 is annular and is sleeved on the air outlet cylinder 8, the space around the air outlet cylinder 8 is fully utilized, the occupied space of the whole device is reduced, and the arrangement on the whole vehicle is facilitated.
The working process of the technical scheme is as follows: when cleaning the filter core, the solenoid valve is closed when not needing the blowback, and when needing clean filter core, the solenoid valve is opened, and the high-pressure air in the air receiver dashes out from the blowback shower nozzle, blows off the particulate matter from the filter core, follows the gas from air inlet 14 and is blown off, then closes the solenoid valve, pressurizes the air receiver, prepares next blowback operation.
Example 2
The above-mentioned scheme in embodiment 1 has realized the circulation operation of blowback, and the inventor also considers that, when the solenoid valve was opened and is carried out the blowback operation, gas receiver pressure can the instantaneous drop, causes the pressure fluctuation of whole gas circuit. And when the engine of the whole machine is started, the air outlet cylinder needs a large amount of compressed air, so that the air path of the whole machine is slowly boosted, and the requirement that the indicated air pressure of an air pressure gauge is increased from zero to starting air pressure in 4min) at 75% rated rotating speed of the engine of an automobile adopting air pressure braking at 7.7.2 in the national standard GB7258-2017 technical conditions for safety in operation of automobiles is difficult to meet. For this reason, in the present invention, on the basis of embodiment 1, a pneumatic protection valve is provided in the intake pipe.
As shown in fig. 1, the air inlet pipe 11 is provided with an air pressure protection valve 12, which is in an open state when the air path of the complete machine is under working pressure and is in a closed state when the air path of the complete machine is less than the working pressure. The specific structure of the air pressure protection valve 12 is shown in fig. 2, the air pressure protection valve 12 has an inlet 21 and an outlet 22, the inlet 21 is communicated with the air passage of the whole vehicle, and the outlet 22 is communicated with the air inlet pipe 11 of the air storage cylinder. A check valve is arranged between the inlet 21 and the outlet 22, the check valve comprises a U-shaped valve body 20 and a valve seat 23, and the valve body 20 and the valve seat 23 can slide relatively (the relatively sliding structure is a sliding rail and sliding groove matching structure, not shown in the figure). The valve seat 23 has a cavity therein, and a first thrust spring is provided in the cavity to support the U-shaped valve body 20 and communicate with the inlet 21. Opposite the U-shaped valve body 20, a diaphragm 24 is arranged, which diaphragm 24 is supported by a second thrust spring in another chamber.
The working principle of the air pressure protection valve is as follows:
when the engine of the whole engine is started, the pressure of the air passage of the whole engine, namely the inlet 21, is normal pressure, at the moment, the diaphragm 24 is pushed under the action of the first thrust spring, so that the U-shaped valve body 20 is pressed on the valve seat 23, and the one-way valve is closed. Because the air cylinder is not communicated, in the normal boosting process of the air circuit of the whole machine, the problem that the boosting time of the air circuit of the whole machine is prolonged due to the fact that the air cylinder is inflated, and the national standard is difficult to meet is solved.
When the pressure of the air path of the whole machine, namely the inlet 21, is gradually increased and is higher than the normal working pressure, the gas pressure overcomes the pressure of the first thrust spring and the thrust of the second thrust spring, so that the diaphragm is raised, the U-shaped valve body 20 is synchronously raised, the one-way valve is opened, and the gas is stored in the gas storage cylinder through the gap between the U-shaped valve body 20 and the valve seat 23 until the inflation is finished.
When the air storage cylinder performs back blowing operation and the air pressure is rapidly reduced, the pressure at the position of the outlet 22 is rapidly reduced, the pressure below the diaphragm 24 is also rapidly reduced, the second thrust spring pushes the diaphragm downwards to press the U-shaped valve body 20 back to the valve seat 23, the one-way valve is closed, and the phenomenon that the pressure of the whole vehicle air path is rapidly reduced to influence the normal work of the whole vehicle air path is avoided.
Example 3
On the basis of embodiment 2, in order to avoid the back-flushing gas circuit to generate gas leakage fault and lead to unnecessary opening and closing of the one-way valve, the bypass valve structure is further added. As shown in fig. 5, a small hole 27 is provided in the bottom of the check valve body, the small hole 27 is opened and closed by the bypass valve 26, and the bypass valve 26 includes a bypass valve body and a third thrust spring supporting the bypass valve body, and the third thrust spring has a small thrust.
In the case of embodiment 2, when the check valve is closed, if the back-flushing air path leaks air, and the pressure difference between the upper and lower parts of the U-shaped valve body 20 reaches a certain level, the check valve will open to inflate the back-flushing air path, and enter the on/off cycle of the check valve.
In this embodiment 3, by adding a bypass valve, gas is introduced into the chamber of the check valve through the orifice 27 via the bypass valve 4. If the outlet 22 and the connected pipeline have air leakage, the air is supplied to the back-blowing air passage through the small hole 27, the influence on the working air pressure of the whole vehicle is small, and the opening caused by overlarge pressure difference between two ends of the check valve is avoided. If there is no air leakage at the outlet 22, the valve 20 will be opened after the air pressure at the inlet 21 reaches the set working pressure, which is the same as the basic structure of the blowback air path of the embodiment 1.
Example 4
The invention also provides engineering machinery equipment comprising the reverse blowing type air filter for the engineering machinery in the embodiment 1 or 2, and the reverse blowing type air filter for the engineering machinery has the technical effect brought by the reverse blowing type air filter for the engineering machinery.

Claims (10)

1. A back-blowing air filter for engineering machinery comprises an air filter device, wherein the air filter device is communicated with external air and an air passage of an engine, and is characterized in that the air filter device is provided with a back-blowing device,
the back-blowing device comprises an air inlet pipe, an air storage cylinder, an air guide pipe and a back-blowing nozzle which are connected in sequence, and the back-blowing nozzle is arranged in the air filtering device;
the air inlet pipe is provided with an air pressure protection valve.
2. The reverse blowing type air cleaner for construction machinery as claimed in claim 1, wherein the air filter device comprises an outside-in housing, a filter element, and an air outlet cylinder,
the filter element is cylindrical, a clean air cavity is formed in the filter element, and an air outlet cylinder is arranged at the bottom of the shell; the shell is of a double-layer structure and comprises an inner wall and an outer wall, the outer side of the filter element is in contact with the inner wall of the shell, and the inner wall is provided with through holes or adopts a net structure.
3. The reverse blowing type air cleaner for construction machinery according to claim 2, wherein the air outlet cylinder supports the housing and communicates with the clean air chamber; the bottom wall of the shell outside the air outlet cylinder is provided with an air inlet, and the opening of the air inlet is downward.
4. The reverse blowing type air cleaner for construction machinery as claimed in claim 3, wherein the outer wall of the air outlet cylinder is provided with longitudinal ribs, and the top ends of the ribs support the housing.
5. The reverse blowing type air filter for construction machinery according to claim 2, wherein the air cylinder is annular and is sleeved on the outer wall of the air outlet cylinder, and the axis of the air cylinder coincides with the axis of the air outlet cylinder;
and a high-pressure air inlet pipe is arranged at one side of the air storage cylinder, an air guide pipe is arranged at the other side of the air storage cylinder, and the air guide pipe penetrates through the cylinder wall of the air outlet cylinder to enter the inside of the filtering part.
6. The reverse blowing type air filter for engineering machinery according to claim 2, wherein the air duct is provided with an electromagnetic valve, and the tail end of the air duct is provided with the reverse blowing nozzle;
the blowback shower nozzle is towards clean air cavity to can dismantle the connection through setting up the connecting piece between with the air duct.
7. The reverse blowing type air cleaner for construction machinery according to claim 1, wherein the air pressure protection valve is in an open state when the whole machine air passage is at a working pressure, and is in a closed state when the whole machine air passage is less than the working pressure.
8. The blowback air cleaner for construction machinery according to claim 7, wherein: the air pressure protection valve is provided with an inlet and an outlet, the inlet is communicated with an air path of the whole vehicle, and the outlet is communicated with an air inlet pipe of the air storage cylinder;
a one-way valve is arranged between the inlet and the outlet, the one-way valve comprises a U-shaped valve body and a valve seat, and the U-shaped valve body and the valve seat can slide relatively; a cavity is arranged in the valve seat, and a first thrust spring is arranged in the cavity to support the U-shaped valve body and is communicated with the inlet;
and a diaphragm is arranged opposite to the U-shaped valve body and supported by a second thrust spring in the other cavity.
9. The blowback air cleaner for construction machinery according to claim 8, wherein: the bottom of the valve body of the one-way valve is provided with a small hole, the small hole is controlled to be opened and closed by a bypass valve, and the bypass valve comprises a bypass valve body and a third thrust spring for supporting the bypass valve body.
10. A working machine comprising a blow-back air cleaner for a working machine according to any one of claims 1-9.
CN202011104930.3A 2020-10-15 2020-10-15 Reverse blowing type air filter for engineering machinery and engineering machinery equipment Pending CN112228257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011104930.3A CN112228257A (en) 2020-10-15 2020-10-15 Reverse blowing type air filter for engineering machinery and engineering machinery equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011104930.3A CN112228257A (en) 2020-10-15 2020-10-15 Reverse blowing type air filter for engineering machinery and engineering machinery equipment

Publications (1)

Publication Number Publication Date
CN112228257A true CN112228257A (en) 2021-01-15

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Application Number Title Priority Date Filing Date
CN202011104930.3A Pending CN112228257A (en) 2020-10-15 2020-10-15 Reverse blowing type air filter for engineering machinery and engineering machinery equipment

Country Status (1)

Country Link
CN (1) CN112228257A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201246247Y (en) * 2008-09-11 2009-05-27 陈立群 Air filter of automobile engine
CN204591543U (en) * 2015-04-09 2015-08-26 李俊超 A kind of truck air cleaner assy
CN105649834A (en) * 2016-03-02 2016-06-08 赵永胜 Pneumatic flapping and air exhausting spraying self-cleaning type air filter
CN106240554A (en) * 2016-07-27 2016-12-21 山东九州汽车制造有限公司 Trailer braking protection valve air-channel system caisson
CN106401813A (en) * 2016-10-13 2017-02-15 广西柳工机械股份有限公司 Air filter for loading machine
CN107351830A (en) * 2017-07-12 2017-11-17 安徽博森互联网科技有限公司 A kind of electric automobile vacuum brake assistor
CN108223209A (en) * 2018-03-06 2018-06-29 张佩玉 Cleaning device for air cleaner
CN108397318A (en) * 2018-04-20 2018-08-14 上海邗越智能科技有限公司 A kind of self-cleaning air filter
CN209510489U (en) * 2019-01-28 2019-10-18 上海邗越智能科技有限公司 A kind of self-cleaning air filter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201246247Y (en) * 2008-09-11 2009-05-27 陈立群 Air filter of automobile engine
CN204591543U (en) * 2015-04-09 2015-08-26 李俊超 A kind of truck air cleaner assy
CN105649834A (en) * 2016-03-02 2016-06-08 赵永胜 Pneumatic flapping and air exhausting spraying self-cleaning type air filter
CN106240554A (en) * 2016-07-27 2016-12-21 山东九州汽车制造有限公司 Trailer braking protection valve air-channel system caisson
CN106401813A (en) * 2016-10-13 2017-02-15 广西柳工机械股份有限公司 Air filter for loading machine
CN107351830A (en) * 2017-07-12 2017-11-17 安徽博森互联网科技有限公司 A kind of electric automobile vacuum brake assistor
CN108223209A (en) * 2018-03-06 2018-06-29 张佩玉 Cleaning device for air cleaner
CN108397318A (en) * 2018-04-20 2018-08-14 上海邗越智能科技有限公司 A kind of self-cleaning air filter
CN209510489U (en) * 2019-01-28 2019-10-18 上海邗越智能科技有限公司 A kind of self-cleaning air filter

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