CN109808729B - Air supply unit air cleaner self-cleaning system with alarming function - Google Patents
Air supply unit air cleaner self-cleaning system with alarming function Download PDFInfo
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- CN109808729B CN109808729B CN201910159692.7A CN201910159692A CN109808729B CN 109808729 B CN109808729 B CN 109808729B CN 201910159692 A CN201910159692 A CN 201910159692A CN 109808729 B CN109808729 B CN 109808729B
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Abstract
The invention discloses an automatic cleaning system of an air supply unit air filter with an alarm function, which comprises an electric control circuit, a controlled circuit and an air circuit executing unit, wherein when the air filter of the air supply unit is blocked to cause certain pressure change, a pressure switch in the electric control circuit is closed, then the electric control circuit triggers the air supply unit in the controlled circuit to stop working, and simultaneously triggers the air circuit executing unit to start cleaning work of the air filter. The invention can automatically detect the blocking condition of the air filter of the air supply unit, automatically start the cleaning work of the air filter, and simultaneously ensure that the air compressor of the air supply unit stops working when the air filter is cleaned so as to ensure safe operation; after the control finishes the purging time of the primary air filter, the cleaning of the air filter is automatically stopped, and meanwhile, the air supply unit resumes work.
Description
Technical Field
The invention relates to the field of air supply units of rail vehicles, in particular to an automatic cleaning system of an air filter of an air supply unit with an alarm function.
Background
The air supply unit for providing compressed air for the vehicle braking system is often arranged on an electric railway vehicle of an open chassis, the air supply unit needs to suck air filtered by an air filter during working, the air with specific pressure is output after being compressed by an air compressor, the air quality depends on the real-time environment of a vehicle operation section because of the direct communication of the open chassis with the atmosphere, the cleaning degree and the maintenance period of an air filter element are affected, the air filter element is easily blocked when the content of particulate matters in the air is higher, the maintenance period of the air filter element is shortened, and once the air filter element is blocked, the air supply unit cannot suck enough air, the air compression work cannot be completed, the filter element is damaged under severe conditions, and once the filter element is damaged, unfiltered air enters a piston cylinder of the compressor, so that abnormal abrasion of a piston is caused, the service life of the air supply unit is affected, and the normal operation of the electric railway vehicle is also affected. The air filter element of the existing power rail vehicle air supply unit has an alarm function, but the air filter element blockage alarm is only implemented by a mechanical structure and is positioned on the air supply unit at the bottom of the vehicle body, and an alarm signal sent out when the blockage state occurs is not easy to be found.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an automatic cleaning system for an air filter of an air supply unit with an alarm function, which comprises the following technical scheme:
The invention provides an automatic cleaning system of an air filter of an air supply unit with an alarm function, which is used for cleaning the air filter of the air supply unit, and comprises an electric control circuit, a controlled circuit and an air path execution unit, wherein the electric control circuit comprises a first power supply, a pressure switch, a controller, an electromagnetic valve and a contactor coil, the controlled circuit comprises a normally closed contactor switch corresponding to the contactor coil, and the normally closed contactor switch controls the on-off of a second power supply and the air supply unit;
The first power supply, the pressure switch and the controller are connected in series to form a first branch, and the pressure switch is used for detecting the pressure of an air filter in the air supply unit and controlling the on-off of the first branch; the electromagnetic valve and the contactor coil are arranged on the second branch, and the controller controls the on-off of the first power supply and the second branch;
the air circuit execution unit comprises an air source for providing air flow for the air filter, and the electromagnetic valve controls the on-off of the air circuit between the air source and the air filter according to the on-off of the first power supply and the second branch circuit.
Further, the controller comprises an execution switch, the second branch is connected with the first power supply through the execution switch, and the execution switch acts according to a control instruction of the controller.
Further, the controller also comprises a timer for timing, and the controller controls the execution switch to be turned off after timing is completed.
Further, the electric control circuit further comprises a forced starting button, a relay coil and a corresponding normally closed relay switch, wherein the first power supply, the forced starting button and the relay coil are connected in series to form a third branch, and the normally closed relay switch is used for controlling the on-off of the first power supply and the second branch.
Further, the air path executing unit further comprises a one-way valve and/or a pressure regulating device arranged between the air source and the air filter, the electromagnetic valve is a two-position two-way electromagnetic valve, and the conduction direction of the one-way valve is the direction from the air source to the air filter.
Further, the air source of the air path execution unit comprises an air compressor and an air storage tank, and the air storage tank is used for storing compressed air output by the air compressor.
Further, the air source of the air path executing unit is an air source of the air supply unit, and the air storage tank is provided with at least two air outlets.
Further, the air path execution unit further comprises an air dryer and/or a safety valve, wherein the air dryer is arranged between the air compressor and the air storage tank, and the safety valve is arranged on a pipeline in front of an air inlet of the air storage tank.
Further, the electrical control circuit further comprises an alarm device, which is arranged in the second branch.
Further, the electrical control circuit further comprises a first circuit breaker for controlling the first power supply; the controlled circuit further comprises a second circuit breaker, wherein the second circuit breaker is used for controlling a second power supply; the second power supply is a three-phase alternating current power supply, and a three-phase motor of the air compressor in the air supply unit is connected with the second power supply through the second circuit breaker and the normally closed contactor switch.
The technical scheme provided by the invention has the following beneficial effects:
a. automatically detecting the blocking state of the air filter, accurately triggering the air circuit execution unit to carry out air flow purging on the air filter, and effectively removing blocked particles on the air filter;
b. When the air path execution unit is triggered to purge, the air supply unit is automatically cut off, so that the air supply unit is ensured to stop working in the process of purging and blocking-removing the air filter, and the purged particulate matters are prevented from being sucked into the air compressor reversely;
c. The one-way valve, the pressure regulating device and the safety valve are reasonably designed in the air path executing unit, so that the air flow safety of blowing the air filter is ensured;
d. the forced starting button is reasonably designed, and after the controller has a control logic error condition, the air compressor of the air supply unit is forced to be started, namely, the cleaning system is initialized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an electrical control circuit diagram of an automatic air cleaner cleaning system provided by an embodiment of the present invention;
FIG. 2 is an electrical control circuit diagram of a cleaning system provided in accordance with another preferred embodiment of the present invention;
FIG. 3 is a controlled circuit diagram of an automatic cleaning system for an air cleaner according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a cleaning air path of an automatic cleaning system for an air cleaner according to an embodiment of the present invention.
Wherein, the reference numerals include: 11-first power supply, 12-pressure switch, 13-controller, 14-solenoid valve, 15-contactor coil, 16-forced start button, 17-relay coil, 18-normally closed relay switch, 19-alarm device, 21-normally closed contactor switch, 22-second power supply, 31-check valve, 32-pressure regulating device, 33-relief valve, 34-air dryer, 41-air filter, 42-air compressor, 43-air storage tank, 44-three-phase motor, 51-first circuit breaker, 52-second circuit breaker.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
In one embodiment of the present invention, an automatic cleaning system for an air cleaner of an air supply unit with an alarm function is provided, and is used for cleaning an air cleaner 41 of the air supply unit, the cleaning system comprises an electric control circuit, a controlled circuit and an air path executing unit, as shown in fig. 1, the electric control circuit comprises a first power supply 11, a pressure switch 12, a controller 13, a solenoid valve 14 and a contactor coil 15, as shown in fig. 3, the controlled circuit comprises a normally closed contactor switch 21 corresponding to the contactor coil 15, and the normally closed contactor switch 21 controls the on-off of a second power supply 22 and the air supply unit;
The first power supply 11, the pressure switch 12 and the controller 13 are connected in series to form a first branch, and the pressure switch 12 is used for detecting the pressure at the air filter 41 in the air supply unit and controlling the on-off of the first branch; the electromagnetic valve 14 and the contactor coil 15 are arranged on the second branch, and the controller 13 controls the on-off of the first power supply 11 and the second branch;
As shown in fig. 4, the air path execution unit includes an air source for providing air flow to the air filter 41, and the electromagnetic valve 14 controls the on/off of the air path between the air source and the air filter 41 according to the on/off of the first power supply 11 and the second branch.
As shown in fig. 1, the working process of the automatic cleaning system for an air cleaner provided in this embodiment is as follows:
When the air filter is blocked, under the suction force of the air compressor in the air supply unit, the pressure between the air filter 41 and the outer cylinder body is reduced compared with the pressure when the air filter is not blocked (the pressure switch 12 is arranged in the area), when the pressure is reduced to a preset pressure threshold value, the pressure switch 12 arranged in the area is closed (after the pressure threshold value is separated, the pressure switch 12 is automatically opened), the first branch is conducted, namely the controller 13 receives a trigger signal, and at the moment, the controller 13 controls the first power supply 11 to supply power to the electromagnetic valve 14 and the contactor coil 15 on the second branch. When the contactor coil 15 is powered on, the normally closed contactor switch 21 on the controlled circuit is changed from closed to open, the second branch is opened, the three-phase motor 42 of the air supply unit compressor is powered off, and the air supply unit stops working; on the other hand, when the solenoid valve 14 is powered on, the air path execution unit operates, that is, the air source supplies an air flow of a certain pressure to the air filter 41, and the air flow sweeps the air filter 41 to remove particles or dust clogged on the air filter 41 and to release the clogged state of the air filter 41. And once the air supply unit stops working, the negative pressure between the air filter 41 and the outer cylinder body is eliminated, the pressure switch 12 is disconnected, and when the pressure switch 12 is closed again, the controller is triggered newly.
Preferably, the electrical control circuit further comprises an alarm device 19, the alarm device 19 is disposed in the second branch, as shown in fig. 1 or fig. 2, the alarm device 19 is connected in series with the electromagnetic valve 14, and the connection position of the alarm device 19 is not limited in the present invention, for example, it may also be disposed in series with the contactor coil 15, or disposed on a dry circuit. In addition, the electromagnetic valve 14 and the contactor coil 15 may be connected in parallel as shown in the figure or may be connected in series (not shown in the figure), and it should be noted that the connection relationship between the electromagnetic valve 14, the contactor coil 15, and the alarm device 19 on the second branch should not be taken as a basis for limiting the protection scope of the present invention.
In practice, the state in which the air supply unit 4 is stopped once the air pre-stored in the air supply unit 4 has been consumed is disadvantageous for the safe operation of the railway vehicle. Thus, in a preferred embodiment of the present invention, the controller 13 further includes a timer for counting time, the controller controls the execution switch to be turned off after the counting time is completed, and a specific timing time may be set manually, for example, a timing time of 20s is set, and after the pressure switch 12 is turned on to trigger the controller 13, the timer starts counting time, and after 20s is reached, the controller 13 controls the first power source 11 to stop supplying power to the second branch, specifically, the controller 13 includes an execution switch, and the second branch is connected to the first power source 11 through the execution switch, and the execution switch acts according to a control instruction of the controller 13. For example, the execution switch may be an electromagnetic relay, and when the pressure switch 12 is closed, the controller 13 outputs a high level to the electromagnetic relay, and the electromagnetic relay is closed; when the timer is ended, the controller 13 outputs a low level to the electromagnetic relay, and the electromagnetic relay is turned off.
In a preferred embodiment of the present invention, the electrical control circuit further includes a forced start button 16, a relay coil 17, and a corresponding normally closed relay switch 18, as shown in fig. 2, where the first power supply 11, the forced start button 16, and the relay coil 17 are connected in series to form a third branch, and the normally closed relay switch 18 is used to control on/off of the first power supply 11 and the second branch. The advantage of this preferred embodiment is that when there is a problem in the control logic of the controller 13, such as after a certain time, the power supply to the second branch is not cut off, then the forced start button 16 needs to be pressed at this time, the third branch is turned on, i.e. the relay coil 17 is powered on, correspondingly, the long closed relay switch 18 is opened, then the first power supply 11 is forced to be disconnected from the second branch, as described above, and as the contactor coil 15 is de-energized, the normally closed contactor switch 21 is restored to be closed, and the second power supply 22 is turned on to the air supply unit, and the air supply unit is restored to operate until the next pressure switch 12 is closed.
The following describes the structure of the air path execution unit, referring to fig. 4, the air path execution unit includes, in addition to an air source, a check valve 31, a pressure adjusting device 32, an air dryer 34, and a safety valve 33 disposed between the air source and an air filter 41, the conduction direction of the check valve 31 is the direction from the air source to the air filter 41, the function of the pressure adjusting device 32 is to prevent the unfiltered air from flowing back, the function of the pressure adjusting device 32 is to reduce the air pressure to a size suitable for purging the air filter, the electromagnetic valve 14 is a two-position two-way electromagnetic valve, and when the two-position two-way electromagnetic valve is powered, the electromagnetic valve 14 is ejected (ejected to the right in fig. 4), so that the air path is conducted. Specifically, the air source of the air path execution unit includes an air compressor 42 and an air storage tank 43, the air storage tank 43 is used for storing compressed air output by the air compressor 42, the air dryer 34 is disposed between the air compressor 42 and the air storage tank 43, the air dryer is used for drying air to be stored in the air storage tank 43, the safety valve 33 is disposed on a pipeline before an air inlet of the air storage tank 43, the safety valve 33 is used for preventing the air pressure entering the air storage tank 43 from being too high, and when a certain pressure value is exceeded, the safety valve 33 is opened to relieve the too high air pressure, so as to ensure the safety of the air flow storage process.
The air compressor 42 and the air storage tank 43 may be independent from the air supply outside the air supply unit, or more preferably, the air supply of the air circuit executing unit and the air supply of the air supply unit are one, that is, the air filter 41 to be cleaned in the air supply unit is purged by the air compressed by the air compressor of the air supply unit itself (stored in the air storage tank), and the air storage tank 43 has at least two air outlets, that is, one of which is led to the air filter 41 and the other is the outlet of the air supply unit of the normal railway vehicle.
As shown in fig. 1, the electrical control circuit further comprises a first circuit breaker 51, the first circuit breaker 51 being for controlling the first power supply 11; as shown in fig. 3, the controlled circuit further includes a second circuit breaker 52, the second circuit breaker 52 being configured to control the second power source 22; the second power supply 22 is a three-phase ac power supply, and the three-phase motor 44 of the air compressor in the air supply unit is connected to the second power supply 22 through the second circuit breaker 52 and the normally closed contactor switch 21.
The automatic cleaning system for the air filter of the air supply unit comprises an electric control circuit, a controlled circuit and an air circuit executing unit, when the air filter of the air supply unit is blocked to cause certain pressure change, a pressure switch in the electric control circuit is closed, then the electric control circuit triggers the air supply unit in the controlled circuit to stop working, and simultaneously triggers the air circuit executing unit to start cleaning work for the air filter. The invention can automatically detect the blocking condition of the air filter of the air supply unit, automatically start the cleaning work of the air filter, and simultaneously ensure that the air compressor of the air supply unit stops working when the air filter is cleaned so as to ensure safe operation; after the control finishes the purging time of the primary air filter, the cleaning of the air filter is automatically stopped, and meanwhile, the air supply unit resumes work.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. An automatic cleaning system of an air filter of an air supply unit with an alarm function is characterized by comprising an electric control circuit, a controlled circuit and an air path execution unit, wherein the electric control circuit comprises a first power supply (11), a pressure switch (12), a controller (13), an electromagnetic valve (14), a contactor coil (15), a forced starting button (16), a relay coil (17) and a corresponding normally closed relay switch (18) and an alarm device (19), the controlled circuit comprises a normally closed contactor switch (21) corresponding to the contactor coil (15), and the normally closed contactor switch (21) controls the on-off of a second power supply (22) and the air supply unit;
The first power supply (11), the pressure switch (12) and the controller (13) are connected in series to form a first branch, and the pressure switch (12) is used for detecting the pressure of an air filter (41) in the air supply unit and controlling the on-off of the first branch; the electromagnetic valve (14), the contactor coil (15) and the alarm device (19) are arranged on the second branch, the controller (13) controls the on-off of the first power supply (11) and the second branch, the first power supply (11), the forced starting button (16) and the relay coil (17) are connected in series to form a third branch, and the normally closed relay switch (18) is used for controlling the on-off of the first power supply (11) and the second branch;
The air circuit execution unit comprises an air source for providing air flow for the air filter (41), the air flow is used for cleaning the air filter (41) of the air supply unit, and the electromagnetic valve (14) controls the on-off of an air circuit between the air source and the air filter (41) according to the on-off of the first power supply (11) and the second branch.
2. An automatic cleaning system for air filters according to claim 1, characterized in that the controller (13) comprises an execution switch, through which the second branch is connected to the first power source (11), the execution switch being operated according to a control instruction of the controller.
3. An air cleaner automatic cleaning system according to claim 2, wherein said controller (13) further includes a timer for counting time, said controller controlling said execution switch to be turned off after counting time is completed.
4. The automatic air cleaner cleaning system according to claim 1, wherein the air path execution unit further comprises a one-way valve (31) and/or a pressure regulating device (32) arranged between the air source and the air cleaner (41), the electromagnetic valve (14) is a two-position two-way electromagnetic valve, and the conduction direction of the one-way valve (31) is the direction from the air source to the air cleaner (41).
5. The automatic air cleaner system according to claim 1, wherein the air source of the air path performing unit includes an air compressor (42) and an air tank (43), and the air tank (43) is configured to store compressed air output from the air compressor (42).
6. The automatic cleaning system for an air cleaner according to claim 5, wherein the air source of the air path performing unit is an air source of an air supply unit, and the air tank (43) has at least two air outlets.
7. The automatic air cleaner cleaning system according to claim 5, wherein the air path execution unit further comprises an air dryer (34) and/or a safety valve (33), the air dryer (34) being disposed between the air compressor (42) and an air tank (43), the safety valve (33) being disposed on a line before an air inlet of the air tank (43).
8. The automatic air cleaner cleaning system according to claim 1, wherein the electrical control circuit further comprises a first circuit breaker (51), the first circuit breaker (51) being for controlling the first power supply (11); the controlled circuit further comprises a second circuit breaker (52), the second circuit breaker (52) being for controlling a second power supply (22); the second power supply (22) is a three-phase alternating current power supply, and a three-phase motor (44) of the air compressor in the air supply unit is connected with the second power supply (22) through the second circuit breaker (52) and the normally closed contactor switch (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910159692.7A CN109808729B (en) | 2019-03-04 | 2019-03-04 | Air supply unit air cleaner self-cleaning system with alarming function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910159692.7A CN109808729B (en) | 2019-03-04 | 2019-03-04 | Air supply unit air cleaner self-cleaning system with alarming function |
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| Publication Number | Publication Date |
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| CN109808729A CN109808729A (en) | 2019-05-28 |
| CN109808729B true CN109808729B (en) | 2024-06-07 |
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| CN201910159692.7A Active CN109808729B (en) | 2019-03-04 | 2019-03-04 | Air supply unit air cleaner self-cleaning system with alarming function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113777004B (en) * | 2021-08-20 | 2024-03-26 | 东风华神汽车有限公司 | Automatic maintenance and verification device and method for air filtration |
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| CN203355488U (en) * | 2013-07-26 | 2013-12-25 | 济宁市齐力机电设备有限公司 | Air filter system of numerically-controlled plasma cutting machine |
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