Fully automatic magnetic filter

A fully automatic magnetic filter includes an apparatus barrel, magnetic rollers, scrapers, and a motor. The number of the magnetic rollers is four and corresponds to the number of the scrapers. The magnetic rollers are located in the apparatus barrel, and each includes an outer layer and an inner core. The outer layer is sleeved onto the inner core. The inner core has a magnetic region and a non-magnetic region. The outer layers of the magnetic rollers are driven and connected through a gear. The outer layer of one of the magnetic rollers is connected with the motor and driven by the motor. Each scraper corresponds to the outer layer of a corresponding one of the magnetic rollers. When the iron filings adsorbed on the outer layer are rotated to the non-magnetic region, the iron filings can be scraped off by the scrapers.

FIELD OF THE INVENTION

The present invention relates to a fully automatic magnetic filter.

BACKGROUND OF THE INVENTION

A conventional magnetic filter is used to filter magnetic impurities in the medium. The magnetic impurities include iron filings. Specifically, the magnetic filter mainly includes a magnetic bar having magnetism. When in use, the magnetic bar is able to adsorb magnetic impurities in the medium, thereby effectively reducing the magnetic impurities in the medium to achieve the purpose of purifying the medium and alleviating the adverse effects caused by the magnetic impurities in the medium on the production quality and production efficiency of the products.

However, since the magnetic bar as a whole has magnetism, it needs to power off the filter when the user wants to clean the magnetic impurities adsorbed on the magnetic bar. Therefore, the working efficiency of the magnetic filter is reduced.

SUMMARY OF THE INVENTION

In view of the shortcomings of the prior art, the primary object of the present invention is to provide a fully automatic magnetic filter that needn't power off for clearing iron filings.

In order to achieve the aforesaid object, the fully automatic magnetic filter of the present invention comprises an cylindrical housing, at least one magnetic roller, at least one scraper, and a motor. The magnetic roller is located in the cylindrical housing. The magnetic roller comprises an outer layer and an inner core. The outer layer is sleeved onto the inner core. Wherein, the inner core has a magnetic region and a non-magnetic region. The scraper is located in the cylindrical housing. The scraper cooperates with the outer layer of the magnetic roller and corresponds to the non-magnetic region. The motor is used to drive the outer layer of the magnetic roller to rotate. Wherein, the number of the at least one magnetic roller is four and corresponds to the number of the at least one scraper. Each scraper corresponds to the outer layer of a corresponding one of the magnetic rollers. The outer layers of the magnetic rollers are driven and connected through a gear. The motor is connected with the outer layer of one of the magnetic rollers.

Preferably, the non-magnetic region extends from one end to another end of the inner core in a longitudinal direction. The non-magnetic region is in the form of a sector.

Preferably, the fully automatic magnetic filter further comprises a first covering plate, a first fixing plate, a second covering plate, and a second fixing plate. The first fixing plate and the second covering plate are connected to two ends of the cylindrical housing, respectively. The inner core extends to an outside of the second covering plate and is connected to the second fixing plate. The second fixing plate is mounted on the second covering plate. One end of the outer layer is connected to the first fixing plate. Another end of the outer layer extends into the outside of the second covering plate and is connected to the gear. The gear is located between the second covering plate and the second fixing plate. The first covering plate is connected with the first fixing plate. The motor is mounted to the first covering plate. An output shaft of the motor is connected to the outer layer of the corresponding magnetic roller.

Preferably, the fully automatic magnetic filter further comprises a bearing and a bearing seat. The bearing and the bearing seat are located at the outside of the second covering plate. The bearing is fitted onto the outer layer and located between the second covering plate and the gear. The bearing seat is fitted onto the bearing and mounted on the second covering plate.

Preferably, the fully automatic magnetic filter further comprises a casing. The casing is mounted on the second covering plate. The casing and the cylindrical housing are located at two ends of the second covering plate, respectively. The gear, the second fixing plate, the bearing and the bearing seat are located in the casing.

Preferably, an outer wall of the cylindrical housing is provided with a liquid inlet and a liquid outlet. The second covering plate has a drain outlet and a sewage outlet. The drain outlet is connected with one end of a first drain tube. An opposing end of the first drain tube extends to an outside of the casing. The sewage outlet is connected with one end of a second drain tube. An opposing end of the second drain tube extends to the outside of the casing.

Preferably, the second drain tube is provided with a drain valve.

Preferably, the first fixing plate is made of polytetrafluoroethylene.

Preferably, the fully automatic magnetic filter further comprises a lifting cylinder. The lifting cylinder is installed on the outer wall of the cylindrical housing. An output shaft of the lifting cylinder is connected to the first covering plate.

According to the above technical features, the present invention has the following advantages:

The fully automatic magnetic filter according to the present invention can adsorb the iron filings in the liquid and can also clean the iron filings adsorbed on the magnetic rollers. There is no need to power off the magnetic filter for cleaning, thereby improving the work efficiency effectively.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown inFIG. 1toFIG. 5, the fully automatic magnetic filter comprises a motor1, a first covering plate2, a first fixing plate3, an cylindrical housing4, a second covering plate5, a magnetic roller6, a gear7, a second fixing plate8, a casing9, a lifting cylinder12, a bearing14, and a bearing seat15. The upper end of the cylindrical housing4is connected to the first fixing plate3. The first fixing plate3may be made of polytetrafluoroethylene. The lower end of the cylindrical housing4is connected to the second covering plate5. The lower end of the second covering plate5is connected to the casing9. Four magnetic rollers6are provided in the cylindrical housing4. Each magnetic roller6comprises an outer layer23and an inner core13. The outer layer23is sleeved onto the inner core13. The outer layer23and the inner core13are rotatable with each other. Wherein, the inner core13extends to the inside of the casing9and is connected to the second fixing plate8. The second fixing plate8is mounted on the second covering plate5. One end of the outer layer23is connected to the first fixing plate3. Another end of the outer layer23extends into the casing9and is connected to the bearing14. The bearing14is located between the second covering plate5and the second fixing plate8. The bearing14is sleeved with the bearing seat15. The bearing seat15is mounted on the second covering plate5. The outer layer23is fitted with the gear7. The gear7is located in the casing9and located between the bearing14and the second fixing plate8. The four magnetic rollers6are driven and connected through the gear7. As shown inFIG. 3, the four magnetic rollers6on the gear7mesh with each other two by two. The first fixing plate3is connected with the first covering plate2. The first covering plate2is connected with the output shaft of the lifting cylinder12. The lifting cylinder12is installed on the outer wall of the cylindrical housing4. The lifting cylinder12can drive the first covering plate2to move up and down so as to open or close the upper end of the cylindrical housing4. The motor1is mounted to the upper end of the first covering plate2. The motor1is connected with the outer layer23of one of the magnetic rollers6. As it can be understood by those skilled in the art, when the lifting cylinder12drives the first covering plate2to descend to close the upper end of the cylindrical housing4, the output shaft of the motor1is connected with the outer layer23. When the lifting cylinder12drives the first covering plate2to ascend to open the upper end of the cylindrical housing4, the output shaft of the motor1is disconnected from the outer layer23. According to the aforesaid, when the motor1is working, it drives the outer layer23of one magnetic roller6to rotate. Since the four magnetic rollers6are driven and connected through the gear, the outer layers23of the other three magnetic rollers are also rotated. The rotating direction of the magnetic rollers6is shown as the arrow inFIG. 3. It should be noted that the outer layer23of the magnetic roller6is rotated but the inner core13is not rotated.

The outer layer23of the magnetic roller6may be made of a stainless steel material and the inner core13is made of a magnetic material so that when the liquid passes through the inside of the cylindrical housing4, the iron filings or the like in the liquid will be adsorbed on the surface of the outer layer23. As shown inFIG. 3, the fully automatic magnetic filter further comprises four scrapers16respectively corresponding to the outer layers23of the four magnetic rollers6. The scrapers16are located in the cylindrical housing4and have a length about equal to that of the cylindrical housing4. In this way, when the outer layers23of the magnetic rollers6located in the cylindrical housing4are rotated, the scrapers16can scrape off the iron filings adsorbed by the outer layers23. Since the iron fittings are affected by the inner core13, it is not easy for the scrapers16to scrape off the iron filings adsorbed by the outer layers23. Therefore, in the present invention, the inner core13has a magnetic region18and a non-magnetic region17. Referring toFIG. 3, the cross section of the inner core13is circular, and the non-magnetic region17is in the form of a sector. The angle of the sector is preferably 60°. The other part other than the sector is the magnetic region18. Wherein, the non-magnetic region17corresponds to the scraper16. When the iron filings adsorbed on the outer layer23are rotated to the non-magnetic region17, the adsorbing force of the inner core13to the iron filings disappears so that the iron filings can be scraped off by the scraper16.

The fully automatic magnetic filter further comprises a first drain tube10and a second drain tube11. The second covering plate5has a drain outlet20and two sewage outlets21. One end of the first drain tube10is connected to the drain outlet20, and the other end of the first drain tube10extends to the outside of the casing9. One end of the second drain tube11is connected to the two sewage outlets21, and the other end of the second drain tube11extends to the outside of the casing9. The second drain tube11is provided with a drain valve22. A liquid inlet19and a liquid outlet24are provided on the outer wall of the cylindrical housing4.

The working principle of the present invention is as follows:

When the motor is started, the outer layers of the four magnetic rollers are rotated. At this time, through the liquid inlet on the outer wall of the cylindrical housing, the liquid is injected into the cylindrical housing. After the liquid passes through the first two magnetic rollers, the outer layers of the magnetic rollers will absorb the iron filings. When the iron filings are rotated to the non-magnetic regions, the iron filings will be scraped off by the scrapers16. The iron filings that have not been adsorbed by the first two magnetic rollers are adsorbed by the latter two magnetic rollers, and then the iron filings are scraped and removed by the corresponding scrapers. The scraped iron filings are sent to the sewage outlets to be drained. The clean liquid is output via the liquid outlet on the outer wall of the cylindrical housing.

The aforementioned motor and the drain valve can be controlled by a PLC (Programmable Logic Controller). Therefore, the rotational speed of the motor and the opening and closing time of the drain valve can be adjusted according to the iron filings content of the material. The iron filings can be cleaned without shutting down the magnetic filter, and the work efficiency can be effectively improved.