WO2013029373A1

WO2013029373A1 - Backwashing filtering device

Info

Publication number: WO2013029373A1
Application number: PCT/CN2012/073764
Authority: WO
Inventors: 黄向阳; 于洋; 常镝
Original assignee: 三一重型装备有限公司; 三一重型综采成套装备有限公司
Priority date: 2011-08-26
Filing date: 2012-04-11
Publication date: 2013-03-07
Also published as: CN202191761U

Abstract

A backwashing filtering device comprises a housing (11) provided with a liquid input port (111), a liquid output port (112) and a pollutant discharge port (113), the liquid input port (111) being provided with a first pressure measuring device (141) and a first electromagnetic valve, the liquid output port (112) being provided with a second pressure measuring device (142), and the pollutant discharge port (113) being provided with a second electromagnetic valve; a filtering screen (12) disposed in the housing (11), a liquid input area (15) being formed between the filtering screen (12) and an inner wall in the housing (11), the liquid input port (111) and the pollutant discharge port (113) both being in communication with the liquid input area (15), and the liquid output port (112) being in communication with the inside of the filtering screen (12); an ultrasonic generation device (13), comprising a drive module (131) connected to the first pressure measuring device (141), the second pressure measuring device (142), the first electromagnetic valve and the second electromagnetic valve, a control module (132) and an ultrasonic generator (133) both connected to the drive module (131), and an ultrasonic transducer (134) connected to the ultrasonic generator (133) and extending into a cavity of the housing (11).

Description

A backwashing filter device. The present application claims priority to Chinese Patent Application No. 201120317413.4, entitled "A Backwashing Filter Device", filed on August 26, 2011, the entire contents of which are incorporated by reference. Combined in this application.

Technical field

The present invention relates to the field of backwashing filtration technology, and more particularly to a backwashing filtration device.

Background technique

Since the reform and opening up, China's industry has achieved tremendous development. At the same time, the development of industry has driven the continuous innovation and development of China's machinery technology. For example, the mechanization and automation of large coal mines have become an inevitable trend in the development of the times. Hydraulic systems play an important role in large coal mine machinery.

The hydraulic medium needs to have a high degree of purity in the hydraulic system to ensure that the hydraulic system can work normally. In the prior art, a backwash filter is usually used for purifying the hydraulic medium.

The backwash filter used in the hydraulic system is a kind of filter that directly pulls the impurities in the hydraulic medium, removes the suspended matter and particles of the hydraulic medium, reduces the turbidity, purifies the water, reduces the system dirt, bacteria, and rust. The precision equipment that is produced to purify the hydraulic medium and protect other equipment of the system.

The backwash filter is provided with a filter device. After the hydraulic medium flows through the filter device, the impurities contained therein are intercepted by the filter screen. After the filter is used for a long time, more impurities will be attached to it, which will affect the fluency of the hydraulic medium flowing through the filter. The backwashing filter is provided with a backwashing line that allows impurities adhering to the surface of the screen to be discharged from the drain port by countercurrent without removing the screen.

However, in the prior art backwashing filter, the impurities attached to the screen are relatively strong, and the impurities on the screen cannot be washed out only by countercurrent washing. As the filter is used for a long time, the impurities on the filter will accumulate and the filter will still clog. It is well known that the removal of the screen in the backwash filter is difficult, especially in the hydraulic system of coal mine machinery, which is often operated under poor conditions. It is more difficult for equipment maintenance personnel to replace the backwash filter.

In order to overcome the problem of incomplete cleaning of the backwashing filter device, there is a backwashing filter device in the prior art. Please refer to FIG. 1. FIG. 1 is a cross-sectional structural view of a backwashing filter device in the prior art. The backwashing filter device comprises a casing 01 and a filter net 02 disposed in the cavity of the casing 01. The casing 01 is provided with a liquid inlet, a liquid outlet and a sewage outlet, and the liquid inlet and the sewage outlet are arranged. All have valve devices. A liquid inlet zone 03 is formed between the filter 02 and the inner wall of the casing 01, and the liquid inlet of the backwashing filter device is directly connected to the liquid inlet zone 03, that is, the hydraulic medium entering from the liquid inlet port flows directly to the liquid inlet zone 03. The liquid outlet communicates with the inside of the filter 02, that is, the hydraulic medium that has been filtered through the filter 02 and enters the inside of the filter 02, and can be directly discharged from the liquid outlet. In addition, the sewage outlet is connected to the liquid inlet zone 03, that is, the hydraulic medium of the liquid inlet zone 03 can be discharged through the sewage outlet. The backwashing filter device also includes an ultrasonic generating device 04 that projects into the cavity of the housing 01.

Thus, the hydraulic medium enters the liquid inlet zone 03 through the liquid inlet, and when the hydraulic medium enters the inside of the filter 02 from the liquid inlet zone 03, impurities contained in the hydraulic medium adhere to the outer wall of the filter 02, when impurities are accumulated. When the influence of the discharge pressure is affected to some extent, it is only necessary to close the valve device of the inlet port and open the ultrasonic generating device 04. Since the ultrasonic generating device 04 has better decontamination performance, the filter 02 can be thoroughly performed. Cleaning. After the ultrasonic wave generating device 04 cleans the filter 02 for a period of time, most of the impurities attached to the filter 02 are separated from the filter net 02. At this time, the valve device of the sewage outlet is opened, and the hydraulic system is controlled to make the hydraulic medium flow backward, and the impurities can be discharged from the sewage outlet with the reverse flow. Therefore, this type of backwashing filter device can effectively clean the impurities adhering to the filter screen.

However, in the above-described backwashing filter device, the worker judges the adhesion of the impurities on the filter 02 by observing the pressure parameters displayed by the pressure measuring device for monitoring the inlet pressure and the outlet pressure. For example, when the inlet pressure is significantly greater than the outlet pressure, the impurities on the surface filter 02 adhere more. At this time, the worker needs to manually control each relevant valve device of the backwashing filter device to clean the filter 02.

Obviously, the above-mentioned backwashing filter device needs to manually judge the blockage condition, and the manual cleaning of the cleaning process of the filter net 02 causes waste of human resources and labor cost in the production process.

Therefore, how to provide a backwashing filter device can effectively save human resources and reduce labor costs, and is an important technical problem to be solved by those skilled in the art.

Summary of the invention

In order to solve the above technical problems, the present invention provides a backwashing filtering device, which can effectively save human resources and reduce labor costs. The invention provides a backwashing filtering device, comprising:

a housing having a liquid inlet, a liquid outlet, and a sewage outlet, wherein the liquid inlet is provided with a first pressure measuring device and a first electromagnetic valve, and the liquid outlet is provided with a second pressure measuring device, The sewage outlet is provided with a second electromagnetic valve;

a filter screen disposed in the casing, an oil inlet zone formed between the filter mesh and the inner wall of the casing, and the liquid inlet and the sewage outlet are both in communication with the liquid inlet zone, The liquid outlet is connected to the inside of the filter;

An ultrasonic generating device, wherein the ultrasonic generating device includes a driving module connected to the first pressure measuring device, the second pressure measuring device, the first electromagnetic valve, and the second electromagnetic valve, and a control connected to the driving module A module and an ultrasonic generator and an ultrasonic transducer coupled to the ultrasonic generator and extending into a cavity of the housing.

Preferably, the housing is provided with a through hole for inserting the ultrasonic transducer, the ultrasonic transducer extends through the through hole into a cavity of the housing, and the ultrasonic transducer is transposed The device maintains a tight seal with the through hole.

Preferably, a sealing device is disposed between the ultrasonic transducer and the through hole.

Preferably, a dam device is disposed between the ultrasonic transducer and the through hole.

Preferably, the ultrasonic transducer extends into the liquid inlet zone.

Preferably, the ultrasonic transducer extends into the interior of the filter.

The invention provides a backwashing filtering device, which comprises a casing, a filter net and an ultrasonic generating device. Wherein, the casing is provided with a liquid inlet for the hydraulic medium to enter, a liquid outlet for the hydraulic medium to flow out, and a sewage outlet. It should be noted that the inlet port is provided with a first pressure measuring device for detecting the inlet pressure of the hydraulic medium and a first solenoid valve for cutting off the entry of the hydraulic medium. The liquid outlet is provided with a second pressure measuring device for detecting the liquid pressure, and the sewage outlet is provided with a second electromagnetic valve. The filter mesh is disposed in the cavity of the casing, and a liquid inlet zone is formed between the filter mesh and the inner wall of the casing, and the liquid inlet port and the sewage discharge port are communicated with the liquid inlet zone, and the liquid outlet port communicates with the interior of the filter mesh. The ultrasonic generating device provided by the present invention comprises a driving module connected to the first pressure measuring device, the second pressure measuring device, the first electromagnetic valve and the second electromagnetic valve, a control module connected to the driving module and an ultrasonic generator and An ultrasonic transducer coupled to the ultrasonic generator and extending into the cavity of the housing.

In this way, the flushing filter device provided by the present invention, the hydraulic medium enters the liquid inlet area through the liquid inlet, and the impurities contained in the hydraulic medium when the hydraulic medium enters the filter net from the liquid inlet area. Will adhere to the outer wall of the filter. When the impurities accumulate to a certain amount, the inlet pressure detected by the first pressure measuring device provided at the inlet port will be significantly greater than the second pressure device provided at the outlet. The pressure of the outlet is reached, and the first pressure measuring device and the second pressure measuring device feed back the pressure values detected by the driving module to the control module, and the control module measures the first pressure measuring device and the second pressure measuring device The pressure value is analyzed and judged. If the pressure difference is greater than the preset range, the control module issues a control command to the driving module, so that the driving module drives the first electromagnetic valve to close to cut off the hydraulic cut-off, and drives the ultrasonic generator to emit Ultrasonic, ultrasonic waves are thoroughly cleaned by the ultrasonic transducer. After the ultrasonic transducer cleans the filter for a period of time, most of the impurities attached to the filter are separated from the filter. At this time, the control module issues a control command to the driving module, so that the driving module opens the second electromagnetic valve of the sewage outlet, and controls the hydraulic system to make the hydraulic medium flow backward, and the impurities can be discharged by the sewage outlet with the reverse flow. Obviously, the backwashing filter device provided by the invention can effectively save human resources and reduce labor costs.

DRAWINGS

1 is a schematic cross-sectional structural view of a backwashing filter device in the prior art;

2 is a schematic structural view of a backwashing filter device according to an embodiment of the present invention;

3 is a schematic cross-sectional structural view of a backwashing filter device according to an embodiment of the present invention; and FIG. 4 is a schematic structural view of a backwash filter device control system according to an embodiment of the present invention.

detailed description

The invention provides a backwashing filtering device, which can effectively save human resources and reduce labor costs.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Backwashing filters are primarily used in hydraulic systems, such as hydraulic systems for construction machinery. The backwash filter unit plays an important role in the hydraulic system, which effectively filters out impurities contained in the hydraulic medium to avoid the problem of damage to the hydraulic pump or other hydraulic components caused by blockage of the hydraulic circuit.

However, in the prior art, the backwashing filter device is observed by the worker for monitoring. The pressure parameters displayed by the pressure measuring device of the hydraulic pressure and the outlet pressure are used to judge the adhesion of impurities on the filter mesh. For example, when the inlet pressure is significantly greater than the outlet pressure, the surface of the filter mesh adheres more. At this time, the staff needs to manually control the relevant valve devices of the backwashing filter device to clean the filter. Obviously, in the prior art, the backwashing filter device needs to manually judge the blockage condition, and the manual cleaning of the filter network cleaning process causes waste of human resources and labor cost in the production process.

In view of this, the present embodiment provides a backwashing filter device, which can effectively save human resources and reduce labor costs.

2 is a schematic structural view of a backwashing filter device according to an embodiment of the present invention; FIG. 3 is a cross-sectional structural view of a backwashing filter device according to an embodiment of the present invention; Schematic diagram of the control system of the medium backwashing filter device.

The invention provides a backwashing filter device comprising a casing 11, a filter screen 12 and an ultrasonic wave generating device 13. The housing 11 is provided with a liquid inlet 111 for the hydraulic medium to enter, a liquid outlet 112 for the hydraulic medium to flow out, and a drain outlet 113.

It should be noted that the inlet port 111 is provided with a first pressure measuring device 141 for detecting the pressure of the hydraulic medium entering the first solenoid valve for shutting off the entry of the hydraulic medium. The liquid outlet 112 is provided with a second pressure measuring device 142 for detecting the liquid pressure, and the drain port 113 is provided with a second electromagnetic valve. The filter 12 is disposed in the cavity of the casing 11, and the liquid inlet 15 is formed between the filter 12 and the inner wall of the casing 11, and the liquid inlet 111 and the sewage outlet 113 are both in communication with the liquid inlet zone, and the liquid outlet 112 It communicates with the inside of the filter 12.

The ultrasonic generating device 13 provided by the present embodiment includes a driving module 131 connected to the first pressure measuring device 141, the second pressure measuring device 142, the first electromagnetic valve and the second electromagnetic valve, and is connected to the driving module 131. The control module 132 and the ultrasonic generator 133 and the ultrasonic transducer 134 connected to the ultrasonic generator and extending into the cavity of the housing 11.

It should be noted that the ultrasonic generator 133 can emit ultrasonic waves, and the ultrasonic transducer 134 can convert the ultrasonic waves emitted from the ultrasonic generator 133 into mechanical vibrations, thereby allowing the hydraulic medium to clean the filter 12 more thoroughly.

In this way, in the hair rinsing filter device provided by the embodiment, the hydraulic medium enters the liquid inlet region 15 through the liquid inlet 111, and when the hydraulic medium enters the filter mesh 12 from the liquid inlet region 15, the impurities contained in the hydraulic medium may Adhered to the outer wall of the filter 12, when impurities accumulate to a certain amount At the same time, the inlet pressure detected by the first pressure measuring device 141 provided at the liquid inlet 111 will be significantly greater than the pressure of the outlet detected by the second pressure measuring device 142 disposed at the outlet port 112, and the first pressure measuring device 141 and the second pressure measuring device 142 feed back the pressure values detected by the driving module 131 to the control module 132, and the control module 132 analyzes the pressure values measured by the first pressure measuring device 141 and the second pressure measuring device 142. It is judged that, if the pressure difference is greater than the preset range, the control module 132 issues a control command to the driving module 131, so that the driving module 131 drives the first electromagnetic valve to close to cut off the hydraulic cut-off, and drives the ultrasonic generator 133 to emit ultrasonic waves. The ultrasonic wave is subjected to a thorough cleaning of the filter 12 by the ultrasonic transducer 134. After the ultrasonic transducer 134 cleans the filter 12 for a period of time, most of the impurities attached to the filter 12 are separated from the filter 12. At this time, the control module 132 issues a control command to the driving module 131, so that the driving module 131 opens the second electromagnetic valve of the sewage outlet 113, and controls the hydraulic system to make the hydraulic medium flow backward, and the impurities can be discharged from the sewage outlet 113 with the reverse flow.

Obviously, the backwashing filter device provided by the specific embodiment can effectively save human resources and reduce labor costs.

In addition, the backwashing filter device provided by the present embodiment eliminates the need to manually observe the pressure values of the first pressure measuring device 141 and the second pressure measuring device 142, and compares the pressure values of the two. When the pressure difference between the first pressure measuring device 141 and the second pressure measuring device 142 reaches a preset value, the backwashing filter device can automatically clean the filter net, effectively avoiding the manual operation and not causing the hydraulic system. The problem of loss.

In addition, it should be noted that, in the backwashing filter device provided by the embodiment, the ultrasonic transducer 134 can protrude into the cavity of the casing 11 in the following manner. The housing 11 may be provided with a through hole through which the ultrasonic transducer 134 is inserted, through which the ultrasonic transducer 134 extends into the cavity of the housing 11.

It should be noted that, because the hydraulic medium has a large pressure in the hydraulic circuit, in order to prevent the hydraulic medium from leaking from the joint of the ultrasonic transducer 134 and the through hole, the ultrasonic transducer 134 and the through hole need to maintain a good seal. Sex.

In a preferred embodiment of the present embodiment, the ultrasonic transducer 134 may be provided with a sealing device at a position matching the through hole, for example, a 0-type sealing jaw may be provided. In this way, the ultrasonic transducer 134 and the through hole are sealed by the 0-type sealing jaw, which effectively avoids the problem that the hydraulic medium is easily leaked by the ultrasonic transducer 134 and the through hole. Of course, in order to prevent a large pressure acting on the hydraulic medium, the ultrasonic transducer 134 is pressed out of the housing 11, and the ultrasonic transducer 134 is provided with a damper at a position matching the through hole to prevent the ultrasonic transducer The relative displacement of the 134 with the through hole further effectively circumvents the technical problem that the hydraulic medium presses the ultrasonic transducer 134 out of the housing 11.

In the backwashing filter device provided by the embodiment, the ultrasonic transducer 134 may specifically protrude into the liquid inlet region 13. Of course, the ultrasonic transducer 134 provided by the specific embodiment may also extend into the filter mesh. The inner region of 12 can only be ensured that after the ultrasonic transducer 134 is activated, the hydraulic medium in the casing 11 can be caused to vibrate.

The foregoing is a detailed description of a backwashing filter device provided by the present invention. The principles and embodiments of the present invention are described herein by using specific examples. The description of the above embodiments is only for helping to understand the method of the present invention. Its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

A backwashing filter device, comprising:

2. The backwashing filter device according to claim 1, wherein the housing is provided with a through hole through which the ultrasonic transducer is inserted, and the ultrasonic transducer extends through the through hole The cavity of the housing, and the ultrasonic transducer maintains a tight seal with the through hole.

The backwashing filter device according to claim 2, wherein a sealing device is provided between the ultrasonic transducer and the through hole.

4. The backwashing filter device according to claim 3, wherein a damper device is disposed between the ultrasonic transducer and the through hole.

The backwashing filter device according to claim 4, wherein the ultrasonic transducer extends into the liquid inlet region.

The backwashing filter device according to claim 4, wherein the ultrasonic transducer extends into the interior of the filter.