EH oil filtering device of boiler

Abstract

The utility model relates to the technical field of boiler electro-hydraulic pressure, in particular to an EH oil filtering device of a boiler, which comprises an oil conveying pipe, a filtering bin fixedly connected to the bottom of the oil conveying pipe, an oil outlet pipe fixedly connected to the bottom of the filtering bin, a metal filter screen fixedly connected to the lower portion of the inner wall of the filtering bin, and a wet dust collector fixedly connected to the middle of the rear end face of the filtering bin. A corrugated pipe is fixedly connected to the output end of the wet dust collector, a connecting pipe is fixedly connected to the end, away from the wet dust collector, of the corrugated pipe, a dust collection plate is fixedly connected to the end, away from the corrugated pipe, of the connecting pipe, a hollow shell is fixedly connected to the upper portion of the inner wall of the front side of the filtering bin, and a motor is fixedly connected to the upper portion of the front side of the right end face of the filtering bin; through design cooperation, the device can filter EH oil input into the filtering bin through the oil conveying pipe, and the situation that the EH oil carries impurities when circulating in an electric hydraulic control system of the boiler, and the stability of the EH oil in the electric hydraulic control system is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler electric hydraulics, in particular to an EH oil filtering device of a boiler. Background Art

[0002] The EH oil of the boiler refers to the oil used in the electric hydraulic control system. In a thermal power plant, the EH oil system of the boiler is mainly used to control the boiler's combustion process, steam production, pressure and other key parameters.

[0003] The EH oil system is an important part of the boiler protection system. It drives actuators such as regulating valves and baffles by providing hydraulic power to achieve precise control of the boiler's operating status. The EH oil needs to have good lubricity, stability and insulation to ensure the normal operation of the electric hydraulic control system.

[0004] However, the EH oil in the electric hydraulic control system on the market needs to be replaced after a certain period of use. The purpose is to continuously circulate the EH oil during the operation of the boiler. However, due to various reasons, the oil may contain impurities and particulate matter. These impurities and particulate matter will affect the normal operation of the EH oil system and reduce the reliability and stability of the system. In view of this, an EH oil filtering device for a boiler is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an EH oil filtering device for a boiler.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an EH oil filtering device for a boiler, comprising an oil delivery pipe, a filter bin is fixedly connected to the bottom of the oil delivery pipe, an oil outlet pipe is fixedly connected to the bottom of the filter bin, a metal filter is fixedly connected to the lower inner wall of the filter bin, a wet vacuum cleaner is fixedly connected to the middle of the rear end face of the filter bin, a bellows is fixedly connected to the output end of the wet vacuum cleaner, an end of the bellows away from the wet vacuum cleaner is fixedly connected to a connecting pipe, an end of the connecting pipe away from the bellows is fixedly connected to a dust suction plate, a hollow shell is fixedly connected to the upper front inner wall of the filter bin, a motor is fixedly connected to the upper front side of the right end face of the filter bin, a threaded rod is fixedly connected to the output end of the motor, a moving block is spirally connected to the outer side of the threaded rod, a sliding rod is fixedly connected to the rear end face of the moving block, and a fixing ring is fixedly connected to the end of the sliding rod away from the moving block.

[0007] As a further description of the above technical solution: the middle of the rear interior of the filter bin is fixedly connected to the outer side of one end of the bellows close to the wet vacuum cleaner, the end of the threaded rod away from the motor is rotatably connected to the middle of the left side of the hollow shell, the middle of the rear end face of the hollow shell is slidably connected to the outer side of the front of the sliding rod, the inner side of the fixed ring is fixedly connected to the outer side of the top end of the connecting pipe, the bottom of the dust suction plate is in contact with the top of the metal filter, and the EH oil input into the filter bin by the oil pipeline can be filtered. At the same time, the wet vacuum cleaner absorbs impurities attached to the metal filter through the dust suction plate to avoid excessive impurities affecting the filtering effect of the metal filter.

[0008] As a further description of the above technical solution: the length and width of the metal filter are matched with the internal length and width of the filter bin, and the front and rear length of the dust collecting plate is matched with the front and rear length of the metal filter, so that when the dust collecting plate slides left and right, impurities on the metal filter are completely sucked away.

[0009] As a further description of the above technical solution: the motor can rotate forward and reverse, the rear end face and the lower end face of the hollow shell are both provided with a slide groove from left to right, and the width of the slide groove provided on the rear end face and the lower end face of the hollow shell matches the diameter of the longitudinal section of the sliding rod. The slide groove on the rear end face of the hollow shell is used for the moving block to drive the sliding rod to slide left and right, and the slide groove on the lower end face of the hollow shell is used to discharge the EH oil that may enter the hollow shell through the slide groove on the rear end face, so as to avoid the EH oil being stored inside the hollow shell and affecting the normal rotation of the threaded rod. At the same time, the EH oil has a certain lubricating effect on the outside of the threaded rod.

[0010] As a further description of the above technical solution: the length of the bellows is the same as the length from front to back inside the filter bin, the inner diameter of the fixing ring matches the diameter of the top cross-section of the connecting pipe, and the fixing ring fixes the connecting pipe to the inside of the fixing ring by means of bolts passing through it. The bellows can be passively retracted or elongated, so that when the moving block drives the connecting pipe inside the fixing ring to move through the sliding rod, the extended length of the bellows is sufficient for the dust collection plate to slide left and right in the filter bin.

[0011] As a further description of the above technical solution: a hollow plate is fixedly connected to the left side of the top of the metal filter, an inclined plate is fixedly connected to the top of the hollow plate, a groove is opened in the middle of the right side of the hollow plate, the left end faces of the hollow plate and the inclined plate are fixedly connected to the lower part of the left inner wall of the filter bin, the inner side of the hollow plate is slidingly connected to the outer side of the dust collecting plate, and the outer side of the bottom end of the fixed ring is slidingly connected to the middle of the inside of the hollow plate, so that the dust collecting plate can be inserted into the hollow plate located on the left inner wall of the filter bin, so as to avoid direct contact between the EH oil and the dust collecting plate and the bellows when the EH oil is injected into the filter bin from the oil pipeline, thereby affecting the normal circulation of the EH oil.

[0012] As a further description of the above technical solution: a groove is opened inside the hollow plate from right to left, and the shape and depth of the groove opened inside the hollow plate match the shape and height of the outer side of the dust collecting plate, and the width of the groove opened on the right side of the hollow plate matches the cross-sectional diameter of the connecting pipe, so that the dust collecting plate can enter the interior of the hollow plate without working, avoiding directly affecting the EH oil falling from the oil pipeline to the metal filter.

[0013] As a further description of the above technical solution: there are two inclined plates, and the inclined plates are distributed on the front and rear sides of the top of the hollow plate. The distance between the inclined plates is the same as the cross-sectional diameter of the connecting pipe. The top of the inclined plate is provided with a slope inclined at forty-five degrees from the upper left side to the lower right side, which can effectively prevent the EH oil from staying on the top of the hollow plate for a long time instead of passing through the metal filter to flow to the oil outlet pipe. At the same time, it also prevents impurities from adhering to the top of the hollow shell for a long time, resulting in the inability to clean the top of the hollow shell.

[0014] The utility model has the following beneficial effects:

[0015] The EH oil filtering device of the boiler designed by the utility model can filter the EH oil in the filter bin input into the oil pipeline through design coordination, so as to prevent the EH oil from carrying impurities when circulating in the electric hydraulic control system of the boiler, thereby affecting the stability of the EH oil in the electric hydraulic control system and improving the service life of the EH oil in the electric hydraulic control system to a certain extent. At the same time, the motor of the filter bin can drive the fixing ring and the dust collecting plate on the inner side of the fixing ring to slide left and right through the threaded rod, so that the wet vacuum cleaner can absorb the impurities attached to the metal filter screen through the dust collecting plate, thereby preventing the subsequent excessive impurities from affecting the filtering effect of the metal filter screen.

[0016] The EH oil filtering device of the boiler designed by the utility model is designed and coordinated so that when the wet vacuum cleaner is not turned on, the device can drive the threaded rod to rotate through the motor to allow the dust collecting plate to be inserted into the hollow plate located on the left inner wall of the filter bin, so as to avoid direct contact between the EH oil and the dust collecting plate and the bellows when the EH oil is injected into the filter bin from the oil pipeline, thereby affecting the normal circulation of the EH oil. At the same time, an inclined plate inclined from the upper left side to the lower right side is arranged on the top of the hollow plate, which can effectively prevent the EH oil from staying on the top of the hollow plate for a long time instead of passing through the metal filter to flow to the oil outlet pipe, and also prevent impurities from being attached to the top of the hollow shell for a long time, resulting in the inability to clean the top of the hollow shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of the filter bin of the utility model;

[0019] Figure 3It is a schematic diagram of the three-dimensional structure of the hollow shell section of the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the hollow plate of the utility model.

[0021] Legend:

[0022] 1. Oil pipeline; 2. Filter chamber; 3. Oil outlet pipe; 4. Wet vacuum cleaner; 5. Motor; 6. Metal filter; 7. Hollow shell; 8. Sliding rod; 9. Fixed ring; 10. Bellows; 11. Connecting pipe; 12. Dust collecting plate; 13. Hollow plate; 14. Inclined plate; 15. Threaded rod; 16. Moving block; 17. Groove. DETAILED DESCRIPTION

[0023] Reference Figure 1-Figure 4 The utility model provides an EH oil filtering device for a boiler, comprising an oil delivery pipe 1, a filter bin 2 is fixed to the bottom of the oil delivery pipe 1 by bolts, an oil outlet pipe 3 is fixed to the bottom of the filter bin 2 by bolts, a metal filter screen 6 is welded below the inner wall of the filter bin 2, a wet dust collector 4 is fixed to the middle of the rear end face of the filter bin 2 by bolts, a bellows 10 is arranged at the output end of the wet dust collector 4, a connecting pipe 11 is arranged at the end of the bellows 10 away from the wet dust collector 4, a dust collecting plate 12 is fixed to the end of the connecting pipe 11 away from the bellows 10 by bolts, a hollow shell 7 is welded above the inner wall of the front side of the filter bin 2, a motor 5 is fixed to the upper side of the front right end face of the filter bin 2 by bolts, an output shaft at the output end of the motor 5 passes through the inside of a threaded rod 15 and is welded and fixed, and the outer side of the threaded rod 15 passes through the inside of a moving block 16 and is connected to the moving block 16. The internal threads inside the moving block 16 are spirally connected, the sliding rod 8 is welded to the rear end face of the moving block 16, and the fixing ring 9 is welded to the end of the sliding rod 8 away from the moving block 16. The middle of the rear of the filter bin 2 is fixedly connected to the outer side of the end of the bellows 10 close to the wet vacuum cleaner 4, and the end of the threaded rod 15 away from the motor 5 is rotatably connected to the middle of the left side of the hollow shell 7, and the middle of the rear end face of the hollow shell 7 is slidably connected to the outer side of the front of the sliding rod 8. The inner side of the fixing ring 9 is fixedly connected to the outer side of the top of the connecting pipe 11, and the bottom of the dust suction plate 12 is in contact with the top of the metal filter screen 6, so as to filter the EH oil input into the filter bin 2 by the oil pipeline 1, and at the same time, the wet vacuum cleaner 4 absorbs impurities attached to the metal filter screen 6 through the dust suction plate 12 to avoid excessive impurities affecting the filtering effect of the metal filter screen 6.

[0024] As a further implementation scheme of the above technical scheme: the length and width of the metal filter 6 match the internal length and width of the filter bin 2, and the front and rear length of the dust collecting plate 12 matches the front and rear length of the metal filter 6, so that when the dust collecting plate 12 slides left and right, impurities on the metal filter 6 are completely sucked away.

[0025] As a further implementation scheme of the above technical scheme: the motor 5 can rotate forward and reverse, the rear end face and the lower end face of the hollow shell 7 are both provided with a slide groove from left to right, and the width of the slide groove provided on the rear end face and the lower end face of the hollow shell 7 matches the diameter of the longitudinal section of the sliding rod 8. The slide groove on the rear end face of the hollow shell 7 is used for the moving block 16 to drive the sliding rod 8 to slide left and right, and the slide groove on the lower end face of the hollow shell 7 is used to discharge the EH oil that may enter the hollow shell 7 through the slide groove on the rear end face, so as to avoid the EH oil being stored inside the hollow shell 7 and affecting the normal rotation of the threaded rod 15. At the same time, the EH oil has a certain lubricating effect on the outer side of the threaded rod 15.

[0026] As a further implementation scheme of the above technical scheme: the length of the bellows 10 is the same as the length from front to back inside the filter bin 2, the inner diameter of the fixing ring 9 matches the diameter of the top cross-section of the connecting pipe 11, and the fixing ring 9 fixes the connecting pipe 11 to the inner side of the fixing ring 9 by means of bolts passing through the fixing ring 9. The bellows 10 can be passively retracted or elongated, so that when the moving block 16 drives the connecting pipe 11 inside the fixing ring 9 to move through the sliding rod 8, the extended length of the bellows 10 is sufficient for the dust collection plate 12 to slide left and right in the filter bin 2.

[0027] As a further implementation scheme of the above technical scheme: a hollow plate 13 is welded to the left side of the top of the metal filter 6, an inclined plate 14 is welded to the top of the hollow plate 13, a groove 17 is opened in the middle of the right side of the hollow plate 13, the left end faces of the hollow plate 13 and the inclined plate 14 are fixedly connected to the lower part of the left inner wall of the filter bin 2, the inner side of the hollow plate 13 is slidingly connected to the outer side of the dust collecting plate 12, the outer side of the bottom end of the fixing ring 9 is slidingly connected to the middle of the inside of the hollow plate 13, the dust collecting plate 12 can be inserted into the hollow plate 13 located on the left inner wall of the filter bin 2, to avoid direct contact between the EH oil and the dust collecting plate 12 and the bellows 10 when the EH oil is injected from the oil pipeline 1 into the filter bin 2, thereby affecting the normal circulation of the EH oil.

[0028] As a further implementation scheme of the above technical scheme: a groove is opened inside the hollow plate 13 from right to left, and the shape and depth of the groove opened inside the hollow plate 13 match the shape and height of the outer side of the dust collecting plate 12, and the width of the groove 17 opened on the right side of the hollow plate 13 matches the cross-sectional diameter of the connecting pipe 11, so that the dust collecting plate 12 can enter the hollow plate 13 without working, avoiding directly affecting the EH oil from falling from the oil pipeline 1 to the metal filter 6.

[0029] As a further implementation scheme of the above technical scheme: there are two inclined plates 14, and the inclined plates 14 are distributed on the front and rear sides of the top of the hollow plate 13. The distance between the inclined plates 14 is the same as the cross-sectional diameter of the connecting pipe 11. The top of the inclined plate 14 is provided with a slope inclined at forty-five degrees from the upper left side to the lower right side, which can effectively prevent the EH oil from staying on the top of the hollow plate 13 for a long time instead of passing through the metal filter 6 to flow to the oil outlet pipe 3. At the same time, it also prevents impurities from adhering to the top of the hollow shell 7 for a long time, resulting in the situation that the top of the hollow shell 7 cannot be cleaned.

[0030] Working principle:

[0031] When the utility model is used, the EH oil circulating in the oil pipeline 1 is injected into the filter bin 2. After the EH oil falls into the filter bin 2, it passes through the metal filter 6 at the bottom of the filter bin 2. The impurities in the EH oil are filtered by the metal filter 6. The filtered EH oil passes through the metal filter 6 to flow to the bottom of the filter bin 2 and is discharged from the oil outlet pipe 3 at the bottom of the filter bin 2. After the metal filter 6 is used to filter the EH oil for a long time, more impurities will be attached to the top of the metal filter 6. If it is not cleaned in time, it is easy to cause the impurities to harden. The wet vacuum cleaner 4 is turned on, and negative pressure is generated inside the wet vacuum cleaner 4. The negative pressure reaches the dust absorption plate 12 through the bellows 10 and the connecting pipe 11. The dust absorption plate 12 absorbs the impurities above the bottom metal filter 6. Then, the motor 5 located on the upper side of the right end face of the filter bin 2 is turned on. The threaded rod 15 at the output end of the motor 5 rotates in the hollow shell 7, and the moving block 16 on the outside of the threaded rod 15 drives the fixing ring 9 fixed on the outside of the connecting pipe 11 to slide left and right through the sliding rod 8. At this time, the connecting pipe 11 inside the fixing ring 9 drives the dust collecting plate 12 to slide left and right on the metal filter 6, and the negative pressure of the wet vacuum cleaner 4 absorbs impurities, and the impurities above the metal filter 6 are cleaned in time. After cleaning, the motor 5 is turned on again, and the motor 5 drives the threaded rod 15 to rotate clockwise, so that the moving block 16 drives the connecting pipe 11 inside the fixing ring 9 and the dust collecting plate 12 to move to the top left side of the filter chamber 2 through the sliding rod 8, until the dust collecting plate 12 is inserted into the left side of the metal filter 6. The outer side of the lower part of the connecting pipe 11 is inserted into the groove 17 in the middle of the hollow plate 13, and the motor 5 is stopped. At this time, the dust collecting plate 12 completely enters the hollow plate 13 to prevent the dust collecting plate 12 from affecting the filtration of the EH oil by the metal filter 6. The top of the inclined plate 14 at the top of the hollow plate 13 is provided with a slope of forty-five degrees from the upper left side to the lower right side, which can effectively prevent the EH oil from staying on the top of the hollow plate 13 for a long time instead of passing through the metal filter 6 to flow to the oil outlet pipe 3.

[0032] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An EH oil filtering device for a boiler, comprising an oil delivery pipe (1), characterized in that: The bottom of the oil delivery pipe (1) is fixedly connected to a filter bin (2), the bottom of the filter bin (2) is fixedly connected to an oil outlet pipe (3), the lower inner wall of the filter bin (2) is fixedly connected to a metal filter screen (6), the middle of the rear end surface of the filter bin (2) is fixedly connected to a wet vacuum cleaner (4), the output end of the wet vacuum cleaner (4) is fixedly connected to a bellows (10), the end of the bellows (10) away from the wet vacuum cleaner (4) is fixedly connected to a connecting pipe (11), the connecting pipe (11) away from the bellows (1 0) is fixedly connected to a dust collecting plate (12), a hollow shell (7) is fixedly connected to the upper inner wall of the front side of the filter bin (2), a motor (5) is fixedly connected to the upper front side of the right end of the filter bin (2), a threaded rod (15) is fixedly connected to the output end of the motor (5), a moving block (16) is spirally connected to the outer side of the threaded rod (15), a sliding rod (8) is fixedly connected to the rear end face of the moving block (16), and a fixing ring (9) is fixedly connected to the end of the sliding rod (8) away from the moving block (16).

2. The EH oil filtering device for a boiler according to claim 1, characterized in that: The middle of the rear interior of the filter bin (2) is fixedly connected to the outer side of one end of the bellows (10) close to the wet vacuum cleaner (4); the end of the threaded rod (15) away from the motor (5) is rotatably connected to the middle of the left interior of the hollow shell (7); the middle of the rear end surface of the hollow shell (7) is slidably connected to the outer side of the front of the sliding rod (8); the inner side of the fixing ring (9) is fixedly connected to the outer side of the top end of the connecting pipe (11); and the bottom of the dust collecting plate (12) is in contact with the top of the metal filter (6).

3. The EH oil filtering device for a boiler according to claim 1, characterized in that: The length and width of the metal filter (6) match the internal length and width of the filter bin (2), and the front-to-back length of the dust collecting plate (12) matches the front-to-back length of the metal filter (6).

4. The EH oil filtering device for a boiler according to claim 1, characterized in that: The motor (5) is capable of forward and reverse rotation, and the rear end face and the lower end face of the hollow shell (7) are both provided with a slide groove extending from left to right, and the width of the slide groove provided on the rear end face and the lower end face of the hollow shell (7) matches the diameter of the longitudinal section of the sliding rod (8).

5. The EH oil filtering device for a boiler according to claim 1, characterized in that: The length of the bellows (10) is the same as the length of the interior of the filter chamber (2) from front to back, the inner diameter of the fixing ring (9) matches the diameter of the top cross-section of the connecting pipe (11), and the fixing ring (9) fixes the connecting pipe (11) to the inner side of the fixing ring (9) by means of bolts passing through the fixing ring (9).

6. The EH oil filtering device for a boiler according to claim 1, characterized in that: A hollow plate (13) is fixedly connected to the left side of the top of the metal filter (6), an inclined plate (14) is fixedly connected to the top of the hollow plate (13), a groove (17) is provided in the middle of the right side of the hollow plate (13), the left end surfaces of the hollow plate (13) and the inclined plate (14) are fixedly connected to the lower part of the left inner wall of the filter bin (2), the inner side of the hollow plate (13) is slidably connected to the outer side of the dust collecting plate (12), and the outer side of the bottom end of the fixing ring (9) is slidably connected to the middle of the inside of the hollow plate (13).

7. The EH oil filtering device for a boiler according to claim 6, characterized in that: A groove is provided inside the hollow plate (13) from right to left, and the shape and depth of the groove provided inside the hollow plate (13) match the shape and height of the outer side of the dust collecting plate (12), and the width of the groove (17) provided on the right side of the hollow plate (13) matches the cross-sectional diameter of the connecting pipe (11).

8. The EH oil filtering device for a boiler according to claim 6, characterized in that: There are two inclined plates (14), and the inclined plates (14) are distributed on the front and rear sides of the top of the hollow plate (13). The distance between the inclined plates (14) is the same as the cross-sectional diameter of the connecting pipe (11). The top of the inclined plate (14) is provided with a slope inclined at a 45-degree angle from the upper left side to the lower right side.

Images