High-pressure oil filtering device of coal mill

Abstract

The utility model belongs to the technical field of filtering devices, and particularly relates to a coal mill high-pressure oil filtering device which comprises an oil supply pipeline, an oil filtering pipeline is arranged on one side of the oil supply pipeline, the two ends of the oil filtering pipeline are connected with the oil supply pipeline, and a first control valve is installed on the oil supply pipeline and located between the two ends of the oil filtering pipeline. Second control valves are installed at the two ends of the oil filtering pipeline, a filtering assembly is arranged on the oil filtering pipeline, and the filtering assembly is located between the two second control valves. When the filter element needs to be replaced, the first control valve is opened, the two second control valves are closed, oil supply in the oil filtering pipeline is stopped at the moment, the filter element of the filter assembly can be replaced, and the filter element can be replaced under the condition that normal production is not affected.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, specifically a high-pressure oil filtration device for a coal mill. Background Technology

[0002] The coal mill in the boiler pulverizing system is an extremely important piece of equipment in large and medium-sized thermal power plants' coal-fired boilers, directly affecting the quality of boiler combustion and the economic efficiency of unit operation. Due to oil quality issues, the high-pressure oil system of the coal mill in coal-fired units frequently malfunctions, causing frequent mill shutdowns and reversals, seriously threatening the safe, stable, and economical operation of the unit and affecting the safe operation of the boiler.

[0003] Currently, most power plant coal-fired unit coal mill high-pressure oil systems use ordinary oil filters to filter the high-pressure oil, and these filters are directly installed on the main oil supply pipeline. Over time, impurities accumulate in the filter elements, affecting the filtration efficiency of the high-pressure oil. Therefore, the filter elements need to be replaced periodically. Because the oil filter is directly installed on the oil supply pipeline, replacing the filter elements requires stopping the high-pressure oil supply, which disrupts normal production. Utility Model Content

[0004] To address the problems mentioned above, this utility model provides a high-pressure oil filtration device for a coal mill. When the filter element needs to be replaced, the first control valve is opened and the two second control valves are closed. At this time, the oil supply in the oil filtration pipeline stops, and the filter element of the filtration assembly can be replaced, thus achieving filter element replacement without affecting normal production.

[0005] This utility model provides a high-pressure oil filtration device for a coal mill, including an oil supply pipe, an oil filter pipe on one side of the oil supply pipe, both ends of the oil filter pipe being connected to the oil supply pipe, a first control valve installed on the oil supply pipe, the first control valve being located between the two ends of the oil filter pipe, a second control valve installed at both ends of the oil filter pipe, and a filter assembly installed on the oil filter pipe, the filter assembly being located between the two second control valves.

[0006] Furthermore, the filter assembly includes a filter housing and a filter housing cover. The filter housing cover is hinged to the top of the filter housing. A fixing component for fixing the filter housing cover is provided on the outer wall of the filter housing. A filter element is provided inside the filter housing.

[0007] Furthermore, the fixing assembly includes two fixing plates, with a locking rod movably passing between the two fixing plates. A connecting block is fixedly connected to the end of the filter box cover away from the hinge. A locking hole is opened in the connecting block. One end of the locking rod is inserted into the locking hole. A pull ring is fixedly connected to the end of the locking rod away from the connecting block. A support ring is fixedly connected to the locking rod. The support ring is located between the two fixing plates. A spring is provided between the fixing plate near the pull ring and the support ring. The support ring abuts against the fixing plate near the connecting block under the elastic action of the spring.

[0008] Furthermore, a sealing gasket is installed between the filter housing and the filter housing cover.

[0009] Furthermore, multiple filter elements are provided, and multiple mounting slots are provided on the bottom wall of the filter box and the bottom surface of the filter box cover. The bottom end of the filter element is inserted into the mounting slot of the filter box, and the top end of the filter element is inserted into the mounting slot of the filter box cover.

[0010] Furthermore, the oil filter pipe is connected to two drain pipes, which are located between the second control valve and the filter assembly. A third control valve is installed on the drain pipe.

[0011] Furthermore, an oil storage tank is connected between the two oil drain pipes, an oil pump is installed at the bottom of the oil storage tank, a return oil pipe is connected to the oil pump, and the end of the return oil pipe away from the oil pump is connected to the oil filter pipe.

[0012] Furthermore, the oil filter pipe, the second control valve, and the filter assembly are all provided in two sets, with the two sets located on both sides of the oil supply pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] (1) During normal production, the first control valve is closed and the two second control valves are opened. The high-pressure oil in the oil supply pipeline enters the filter assembly through the oil filter pipeline for filtration, and then returns to the oil supply pipeline through the oil filter pipeline to enter the next process. When the filter element needs to be replaced, the first control valve is opened and the two second control valves are closed. At this time, the oil supply in the oil filter pipeline stops, and the high-pressure oil directly enters the next process through the oil supply pipeline, so that the filter element in the filter assembly can be replaced. This achieves the replacement of the filter element without affecting normal production.

[0015] (2) The high-pressure oil remaining in the filter pipe enters the oil storage tank through the drain pipe. After the filter element is replaced, the oil pump will pump the high-pressure oil collected in the oil storage tank back into the filter pipe for use, thereby reducing the waste of high-pressure oil.

[0016] (3) When the filter element of one side of the filter assembly is replaced, the filter assembly of the other side can be used to filter the high pressure oil. Moreover, the two filter assemblies can be used alternately to ensure the filtration effect of the high pressure oil at all times. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-pressure oil filtration device for a coal mill.

[0019] Figure 2 A schematic diagram of one side of the oil supply pipeline;

[0020] Figure 3 This is a structural diagram of the fixed component;

[0021] Figure 4 This is a cross-sectional view of the interior of the filter box;

[0022] Figure 5 This is a schematic diagram of the filter housing.

[0023] Explanation of reference numerals in the attached drawings: 1. Oil supply pipe; 2. Oil filter pipe; 3. First control valve; 4. Second control valve; 5. Filter assembly; 50. Filter box body; 51. Filter box cover; 52. Hinge; 53. Filter element; 54. Sealing gasket; 55. Mounting groove; 6. Fixing assembly; 60. Fixing plate; 61. Locking rod; 62. Connecting block; 63. Locking hole; 64. Pull ring; 65. Support ring; 66. Spring; 7. Oil drain pipe; 8. Third control valve; 9. Oil storage tank; 10. Oil pump; 11. Return oil pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The present invention will be described in detail with specific embodiments.

[0026] Reference Figures 1-5 The present invention provides a high-pressure oil filtration device for a coal mill, comprising an oil supply pipe 1, an oil filter pipe 2 provided on one side of the oil supply pipe 1, both ends of the oil filter pipe 2 being connected to the oil supply pipe 1, a first control valve 3 installed on the oil supply pipe 1, the first control valve 3 being located between the two ends of the oil filter pipe 2, a second control valve 4 installed at both ends of the oil filter pipe 2, and a filter assembly 5 provided on the oil filter pipe 2, the filter assembly 5 being located between the two second control valves 4.

[0027] During normal production, the first control valve 3 is closed and the two second control valves 4 are opened. The high-pressure oil in the oil supply pipeline 1 enters the filter assembly 5 through the oil filter pipeline 2 for filtration, and then returns to the oil supply pipeline 1 through the oil filter pipeline 2 to enter the next process. When the filter element 53 needs to be replaced, the first control valve 3 is opened and the two second control valves 4 are closed. At this time, the oil supply in the oil filter pipeline 2 stops, and the high-pressure oil directly enters the next process through the oil supply pipeline 1, so that the filter element 53 in the filter assembly 5 can be replaced. This allows the filter element 53 to be replaced without affecting normal production.

[0028] The filter assembly 5 includes a filter housing 50 and a filter housing cover 51. The filter housing cover 51 is hinged to the top of the filter housing 50 via a hinge 52. A fixing component 6 for securing the filter housing cover 51 is provided on the outer wall of the filter housing 50. A filter element 53 is disposed inside the filter housing 50. To replace the filter element 53, first release the fixing component 6, then open the filter housing cover 51 to replace the filter element 53. After replacement, close the filter housing cover 51 and secure it with the fixing component 6. The replacement of the filter element 53 is extremely convenient.

[0029] The fixing assembly 6 includes two fixing plates 60, with a locking rod 61 movably passing between the two fixing plates 60. A connecting block 62 is fixedly connected to the end of the filter box cover 51 away from the hinge 52. A locking hole 63 is provided in the connecting block 62. One end of the locking rod 61 is inserted into the locking hole 63. A pull ring 64 is fixedly connected to the end of the locking rod 61 away from the connecting block 62. A support ring 65 is fixedly connected to the locking rod 61. The support ring 65 is located between the two fixing plates 60. A spring 66 is provided between the fixing plate 60 near the pull ring 64 and the support ring 65. The support ring 65 abuts against the fixing plate 60 near the connecting block 62 under the elastic action of the spring 66.

[0030] When the filter box cover 51 needs to be opened, pull the pull ring 64. The pull ring 64 drives the locking rod 61 to move away from the connecting block 62. When the locking rod 61 disengages from the locking hole 63, the filter box cover 51 can be opened. When the filter element 53 has been replaced and the filter box cover 51 needs to be closed, release the pull ring 64. Under the elastic action of the spring 66, the locking rod 61 moves towards the connecting block 62. When the locking hole 61 is inserted into the locking hole 63, the filter box cover 51 is fixed.

[0031] A sealing gasket 54 is provided between the filter housing 50 and the filter housing cover 51. The sealing gasket 54 can seal the gap between the filter housing 50 and the filter housing cover 51 to prevent high-pressure oil from leaking out of the filter housing 50.

[0032] Multiple filter elements 53 are provided. Multiple mounting slots 55 are formed on the bottom wall of the filter housing 50 and the bottom surface of the filter housing cover 51. The bottom end of the filter element 53 is inserted into the mounting slot of the filter housing 50, and the top end of the filter element 53 is inserted into the mounting slot of the filter housing cover 51. Multiple filter elements 53 can filter the high-pressure oil multiple times, thereby improving the filtration effect of the high-pressure oil. Furthermore, the fact that both the top and bottom ends of the filter element are inserted into the mounting slots 55 improves the stability of the filter element 53.

[0033] Two drain pipes 7 are connected to the oil filter pipe 2. The drain pipes 7 are located between the second control valve 4 and the filter assembly 5. A third control valve 8 is installed on the drain pipe 7. After closing the second control valve 4 when replacing the filter element 53, the third control valve 8 is opened first to release the high-pressure oil in the oil filter pipe 2 and relieve the pressure in the pipe, preventing residual high-pressure oil in the oil filter pipe 2 from spraying out when replacing the filter element 53.

[0034] An oil storage tank 9 is connected between the two drain pipes 7. An oil pump 10 is installed at the bottom of the oil storage tank 9, and a return oil pipe 11 is connected to the oil pump 10. The end of the return oil pipe 11 away from the oil pump 10 is connected to the oil filter pipe 2. The high-pressure oil remaining in the oil filter pipe 2 enters the oil storage tank 9 through the drain pipe 7. After the filter element 53 is replaced, the oil pump 10 will pump the high-pressure oil collected in the oil storage tank 9 back into the oil filter pipe 2 for reuse, thereby reducing the waste of high-pressure oil.

[0035] The oil filter pipe 2, the second control valve 4, and the filter assembly 5 are all provided in two sets, and the two sets are located on both sides of the oil supply pipe 1. When the filter element 53 of one side of the filter assembly 5 is replaced, the filter assembly 5 on the other side can be used to filter the high-pressure oil. Moreover, the two sets of filter assemblies 5 can be used alternately to ensure the filtration effect of the high-pressure oil at all times.

[0036] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A high-pressure oil filtration device for a coal mill, characterized in that, The system includes an oil supply pipeline, an oil filter pipeline on one side of the oil supply pipeline, both ends of the oil filter pipeline being connected to the oil supply pipeline, a first control valve installed on the oil supply pipeline, the first control valve being located between the two ends of the oil filter pipeline, a second control valve installed at both ends of the oil filter pipeline, and a filter assembly installed on the oil filter pipeline, the filter assembly being located between the two second control valves.

2. The high-pressure oil filtration device for a coal mill according to claim 1, characterized in that, The filter assembly includes a filter housing and a filter housing cover. The filter housing cover is hinged to the top of the filter housing via a hinge. A fixing component for fixing the filter housing cover is provided on the outer wall of the filter housing. A filter element is disposed inside the filter housing.

3. The high-pressure oil filtration device for a coal mill according to claim 2, characterized in that, The fixing assembly includes two fixing plates, with a locking rod movably passing between the two fixing plates. A connecting block is fixedly connected to the end of the filter box cover away from the hinge. A locking hole is provided in the connecting block. One end of the locking rod is inserted into the locking hole. A pull ring is fixedly connected to the end of the locking rod away from the connecting block. A support ring is fixedly connected to the locking rod. The support ring is located between the two fixing plates. A spring is provided between the fixing plate near the pull ring and the support ring. The support ring abuts against the fixing plate near the connecting block under the elastic action of the spring.

4. The high-pressure oil filtration device for a coal mill according to claim 2, characterized in that, A sealing gasket is provided between the filter box body and the filter box cover.

5. The high-pressure oil filtration device for a coal mill according to claim 2, characterized in that, The filter element is provided in multiple ways. Multiple mounting slots are provided on the bottom wall of the filter box and the bottom surface of the filter box cover. The bottom end of the filter element is inserted into the mounting slot of the filter box, and the top end of the filter element is inserted into the mounting slot of the filter box cover.

6. The high-pressure oil filtration device for a coal mill according to claim 1, characterized in that, The oil filter pipe is connected to two oil drain pipes, which are located between the second control valve and the filter assembly. A third control valve is installed on the oil drain pipe.

7. The high-pressure oil filtration device for a coal mill according to claim 6, characterized in that, An oil storage tank is connected between the two oil drain pipes. An oil pump is installed at the bottom of the oil storage tank. A return oil pipe is connected to the oil pump. The end of the return oil pipe away from the oil pump is connected to the oil filter pipe.

8. The high-pressure oil filtration device for a coal mill according to claim 1, characterized in that, The oil filter pipe, the second control valve, and the filter assembly are all provided in two sets, and the two sets are located on both sides of the oil supply pipe.

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