Fuel oil filtering and impurity removing device convenient to detect and clean

Abstract

The filtering and impurity removing device comprises a primary filtering tank body with a hollow inner cavity and an opening in the top, a liquid inlet pipe is arranged on the upper side edge of the periphery of the primary filtering tank body, a liquid outlet pipe is arranged at the bottom of the primary filtering tank body, and a rough filtering assembly and a fine filtering assembly which are arranged up and down are arranged in the inner cavity of the primary filtering tank body. According to the filtering and impurity removing device convenient to detect and clean for the fuel oil, the coarse filtering assembly and the fine filtering assembly are matched, the coarse filtering assembly intercepts large-particle impurities in the fuel oil, the fine filtering assembly intercepts fine impurities in the fuel oil, after the device is used for a period of time, a primary sealing cover is opened, the coarse filtering assembly is taken out, and the coarse filtering assembly is cleaned and replaced; the device does not need to be shut down, the fine filtering assembly can still continuously filter fuel oil, the filtering efficiency of the device is not affected, the rough filtering assembly and the fine filtering assembly are used in cooperation, the cleaning interval time of the fine filtering assembly is prolonged, and the working efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel oil filtering, in particular to a fuel oil filtering and impurity removal device which is convenient for detection and cleaning. Background Art

[0002] Fuel oil, also known as heavy oil or residual oil, is a dark brown viscous flammable liquid. Fuel oil is mainly made from petroleum cracking residue oil and straight-run residue oil. It is characterized by high viscosity and contains a lot of non-hydrocarbon compounds, colloids and asphaltene. Its main components are hydrocarbons, and it also contains some sulfur and trace amounts of inorganic compounds. It is mainly used as fuel for large steam turbine boilers and medium and large ship engines. The current research direction of fuel oil is mainly the cracking of long-chain hydrocarbons, with the aim of obtaining light diesel or kerosene by cracking fuel oil.

[0003] During the blending process of fuel oil, there will be certain impurities, such as some precipitates and suspended matter that are insoluble in gasoline, ethanol and benzene solvents. During the production, storage and use process, mechanical wear or other external pollutants will produce some impurities in the fuel oil, as well as organic metal salts that are difficult to dissolve in solvents, etc. Therefore, it is necessary to filter it to prevent mechanical accidents.

[0004] At present, when the fuel filter device filters it, it uses a filter structure such as a filter screen or a filter element to filter it. Due to long-term filtering, a large amount of impurities will adhere to and clog the surface of the filter structure, and it needs to be cleaned frequently afterwards. During the cleaning process, the filter device needs to be shut down. Only when the filter component is cleaned and reinstalled in the device can the device be opened for another filtering operation. The cleaning interval is short, which seriously affects its filtering efficiency. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the utility model proposes a filtering and impurity removal device for fuel oil which is easy to detect and clean, comprising a primary filtering tank body with a hollow inner cavity and an open top, a liquid inlet pipe is provided on the side of the outer periphery of the primary filtering tank body, a liquid outlet pipe is provided at the bottom of the primary filtering tank body, a coarse filter assembly and a fine filter assembly are arranged up and down in the inner cavity of the primary filtering tank body, and a primary sealing cover for closing the top opening part of the primary filtering tank body is detachably fixedly connected to the primary filtering tank body.

[0006] To achieve the above-mentioned purpose, the fuel oil enters the inner cavity of the primary filter tank through the liquid inlet pipe, and the fuel oil entering the inner cavity of the primary filter tank passes through the coarse filter component and the fine filter component in sequence along the flow path, and the fuel oil filtered by the coarse filter component and the fine filter component is discharged from the liquid outlet pipe. The coarse filter component is set to intercept large particles of impurities in the fuel oil, and the fine filter component is set to intercept fine impurities in the fuel oil. After a period of use, the primary sealing cover is opened, the coarse filter component is taken out, and the coarse filter component is cleaned and replaced. During this process, the device does not need to be shut down, and the fine filter component can still continuously filter the fuel oil without affecting the filtering efficiency of the device. The coarse filter component and the fine filter component are used in combination to increase the cleaning interval of the fine filter component and increase the working efficiency of the device.

[0007] Furthermore, the coarse filter assembly includes a coarse filter basket arranged in the inner cavity of the primary filter tank body, the outer wall of the coarse filter basket is in contact with the inner cavity of the primary filter tank body, the coarse filter basket is provided with a handle for taking, and the coarse filter basket is provided with a circular hole located outside the liquid inlet pipe and adapted to the liquid inlet pipe on the side facing the liquid inlet pipe.

[0008] Through the above technical solution, the coarse filter basket is inserted into the inner cavity of the primary filter tank, the circular hole is adapted to the liquid inlet pipe and is interconnected, the fuel oil directly enters the coarse filter basket through the liquid inlet pipe and the circular hole, the fuel oil is initially filtered through the coarse filter basket, the large particles of dirt in the fuel oil are intercepted by the coarse filter basket, the cleaning interval time of the fine filter component is increased, and the working efficiency of the device is increased.

[0009] Furthermore, an upper annular plate is fixed to the inner groove wall of the primary filter tank body, the coarse filter basket is placed on the upper annular plate and is completely fitted with the upper annular plate, the top of the coarse filter basket extends out of the primary filter tank body, and the end of the coarse filter basket extending out of the primary filter tank body contacts the top of the inner groove of the primary sealing cover.

[0010] Through the above technical solution, the coarse filter basket is placed on the upper annular plate, the primary sealing cover is fixedly connected to the primary filter tank body, the upper annular plate and the primary sealing cover clamp the coarse filter basket, and the coarse filter basket will not shake under the impact of fuel oil and affect the coarse filtration of fuel oil.

[0011] Furthermore, the fine filter assembly includes a partition, and the inner cavity of the primary filter tank is divided into a filter cavity and a drainage cavity by the partition, and a plurality of mounting tubes are evenly arranged on the partition, and the filter cavity and the drainage cavity are interconnected through the mounting tubes, and a connecting tube is threadedly connected to the mounting tube, and the connecting tube extends out of the mounting tube, and a fine filter tube located in the filter cavity is fixed to one end of the connecting tube extending out of the mounting tube, and the inner cavity of the fine filter tube is hollow and opens toward one side of the connecting tube, and the inner cavities of the fine filter tube, the connecting tube, and the mounting tube are interconnected.

[0012] Through the above technical solution, the fuel oil flows into the filter cavity through the coarse filter basket, and fine impurities will be retained in the filter cavity. Outside the fine filter tube, the fuel oil that has passed the fine filtration enters the inner cavity of the fine filter tube, and then enters the drainage cavity through the connecting tube. By setting up multiple fine filter tubes, the filtration area of ​​the fuel oil is increased and the filtration efficiency of the fuel oil is improved.

[0013] Furthermore, a lower annular plate is fixed to the lower side of the inner cavity groove wall of the primary filter tank body, the partition is placed on the lower annular plate, and the partition is provided with an annular clamping block adapted to the lower annular plate on the side facing the lower annular plate, and the annular clamping block is tightly connected to the lower annular plate, a guide tube is fixed to the top of the fine filter tube, and a plurality of protruding tubes adapted to the guide tube are provided at the bottom of the coarse filter basket, and the guide tubes are inserted into the protruding tubes and are clamped and connected to the protruding tubes.

[0014] Through the above technical scheme, the lower annular plate supports the partition, which is convenient for cleaning the primary filter tank body. The partition and the lower annular plate are connected by an annular clamp block. Even if the coarse filter basket is taken out, the fine filter tube and the partition will not fall over. When the coarse filter basket is installed in the inner cavity of the primary filter tank body, the guide tube is inserted into the protruding tube. The protruding tube and the coarse filter basket improve the stability of the fine filter tube without affecting the filtration of the coarse filter basket.

[0015] Furthermore, a secondary filter assembly for further screening the fuel oil in the filter cavity is provided beside the primary filter tank.

[0016] Through the above technical solution, after the device has been used for a period of time, impurities adhere to the fine filter tube, resulting in poor filtering effect of the fine filter tube, and part of the fuel oil mixed with impurities remains in the filter cavity. In order to further remove the fuel oil mixed with impurities in the filter cavity, a secondary filter assembly is provided.

[0017] Furthermore, the secondary filter assembly includes a secondary filter tank body which is arranged beside the primary filter tank body and has a hollow inner cavity. The inner cavity of the secondary filter tank body is connected to the filter cavity of the primary filter tank body through an infusion tube. The infusion tube is provided with a manual valve for controlling the on-and-off of the pipeline. A filter basket adapted to the secondary filter tank body is placed in the inner cavity of the secondary filter tank body. The filter basket has an inclined surface facing the infusion tube and is located below the infusion tube. A drain pipe for discharging filtered fuel oil is provided at the bottom of the secondary filter tank body. The top of the secondary filter tank body is open, and a secondary sealing cover for closing the top opening of the secondary filter tank body is detachably fixedly connected to the secondary filter tank body.

[0018] Through the above technical solution, in the initial state, the manual valve is closed, the infusion pipe is disconnected, and the fuel oil cannot enter the secondary filter tank body cavity through the infusion pipe. When the coarse filter basket and the fine filter tube need to be cleaned or the fine filter tube is attached with dirt, the manual valve is opened, the infusion pipe is opened, and the fuel oil in the filter cavity enters the secondary filter tank body cavity through the infusion pipe and enters the filter basket. The fuel oil is filtered by the filter basket and the filtered fuel oil is discharged through the drain pipe.

[0019] In summary, the fuel oil filtering and impurity removal device that is easy to detect and clean has the following beneficial effects:

[0020] (1) The fuel oil filtering and impurity removal device which is easy to detect and clean, the fuel oil enters the inner cavity of the primary filter tank through the liquid inlet pipe, the fuel oil entering the inner cavity of the primary filter tank passes through the coarse filter component and the fine filter component in sequence along the flow path, and the fuel oil filtered by the coarse filter component and the fine filter component is discharged from the liquid outlet pipe, the coarse filter component is set to intercept large particles of impurities in the fuel oil, and the fine filter component is set to intercept fine impurities in the fuel oil. After using for a period of time, the primary sealing cover is opened, the coarse filter component is taken out, and the coarse filter component is cleaned and replaced. During this process, the device does not need to be shut down, and the fine filter component can still continuously filter the fuel oil, which does not affect the filtering efficiency of the device. The coarse filter component and the fine filter component are used in combination to increase the cleaning interval of the fine filter component and increase the working efficiency of the device.

[0021] (2) The fuel oil filtering and impurity removal device which is easy to detect and clean, after being used for a period of time, impurities adhere to the fine filter tube, resulting in poor filtering effect of the fine filter tube, and part of the fuel oil mixed with impurities is retained in the filter cavity. By setting a secondary filter component, the fuel oil mixed with impurities in the filter cavity can be removed, thereby reducing costs. At the same time, the coarse filter component and the fine filter component can be replaced and cleaned without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described and elaborated below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the top view of the primary filtering tank of the utility model;

[0025] Figure 3 It is a partial cross-sectional structural schematic diagram of a primary filtering tank of the utility model;

[0026] Figure 4 It is a schematic diagram of the explosion structure of the utility model;

[0027] Figure 5It is a schematic diagram of the cross-sectional structure of the fine filter tube of the utility model.

[0028] Figure numerals: 1. primary filter tank body; 101. liquid inlet pipe; 102. liquid outlet pipe; 103. primary sealing cover; 104. filter chamber; 105. drainage chamber; 2. coarse filter assembly; 201. coarse filter basket; 202. handle; 203. circular hole; 204. raised tube; 3. fine filter assembly; 301. partition; 302. mounting tube; 303. connecting tube; 304. fine filter tube; 4. upper annular plate; 5. lower annular plate; 6. guide tube; 7. secondary filter assembly; 701. secondary filter tank body; 702. liquid infusion tube; 703. manual valve; 704. filter basket; 705. drainage pipe; 706. secondary sealing cover. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be more clearly and completely explained below by describing the preferred embodiments of the present invention in combination with the accompanying drawings.

[0030] like Figure 1-5 As shown, a preferred embodiment of the utility model is a filtering and impurity removal device for fuel oil which is easy to detect and clean, comprising a primary filtering tank body 1 with a hollow inner cavity and an open top, a liquid inlet pipe 101 is provided on the side of the outer periphery of the primary filtering tank body 1, a liquid outlet pipe 102 is provided at the bottom of the primary filtering tank body 1, a coarse filter assembly 2 and a fine filter assembly 3 arranged up and down are provided in the inner cavity of the primary filtering tank body 1, and a primary sealing cover 103 for closing the top opening part of the primary filtering tank body 1 is detachably fixedly connected to the primary filtering tank body 1.

[0031] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The fuel oil enters the inner cavity of the primary filter tank body 1 through the liquid inlet pipe 101, and the fuel oil entering the inner cavity of the primary filter tank body 1 passes through the coarse filter component 2 and the fine filter component 3 in sequence along the flow path. The fuel oil filtered by the coarse filter component 2 and the fine filter component 3 is discharged from the liquid outlet pipe 102. The coarse filter component 2 is provided to intercept large particles of impurities in the fuel oil, and the fine filter component 3 is provided to intercept fine impurities in the fuel oil. After using it for a period of time, the primary sealing cover 103 is opened, the coarse filter component 2 is taken out, and the coarse filter component 2 is cleaned and replaced. During this process, the device does not need to be shut down, and the fine filter component 3 can still continue to filter the fuel oil, which does not affect the filtering efficiency of the device. The coarse filter component 2 and the fine filter component 3 are used in combination to increase the cleaning interval of the fine filter component 3 and increase the working efficiency of the device.

[0032] like Figure 2 and Figure 3 and Figure 4The coarse filter assembly 2 includes a coarse filter basket 201 arranged in the inner cavity of the primary filter tank body 1, the outer wall of the coarse filter basket 201 is in contact with the inner cavity of the primary filter tank body 1, and a handle 202 for taking is provided on the coarse filter basket 201. The coarse filter basket 201 is provided with a circular hole 203 located outside the liquid inlet pipe 101 and adapted to the liquid inlet pipe 101 on the side facing the liquid inlet pipe 101.

[0033] like Figure 2 and Figure 3 and Figure 4 The coarse filter basket 201 is inserted into the inner cavity of the primary filter tank body 1, the circular hole 203 is adapted to the liquid inlet pipe 101 and is interconnected, the fuel oil directly enters the coarse filter basket 201 through the liquid inlet pipe 101 and the circular hole 203, and the fuel oil is initially filtered by the coarse filter basket 201, and the large particles of dirt in the fuel oil are intercepted by the coarse filter basket 201, thereby increasing the cleaning interval time of the fine filter component 3 and increasing the working efficiency of the device.

[0034] like Figure 2 and Figure 3 and Figure 4 Rubber sealing rings are fixed on the circular hole 203 and the outer periphery of the coarse filter basket 201. The fuel oil enters the coarse filter basket 201 through the circular hole 203 via the liquid inlet pipe 101, and will not enter the gap between the inner cavity wall of the primary filter tank body 1 and the coarse filter basket 201 without passing through the coarse filter basket 201.

[0035] like Figure 3 and Figure 4 An upper annular plate 4 is fixed to the inner groove wall of the primary filtering tank body 1, and the coarse filter basket 201 is placed on the upper annular plate 4 and is completely fitted with the upper annular plate 4. The top of the coarse filter basket 201 extends out of the primary filtering tank body 1, and the end of the top of the coarse filter basket 201 extending out of the primary filtering tank body 1 contacts the top of the inner groove of the primary sealing cover 103.

[0036] like Figure 3 and Figure 4 The coarse filter basket 201 is placed on the upper annular plate 4, the primary sealing cover 103 is fixedly connected to the primary filter tank body 1, the upper annular plate 4 and the primary sealing cover 103 clamp the coarse filter basket 201, and the coarse filter basket 201 will not shake under the impact of fuel oil and affect the coarse filtration of fuel oil.

[0037] like Figure 3 and Figure 4 and Figure 5The fine filter assembly 3 includes a horizontally arranged partition 301. The inner cavity of the primary filter tank body 1 is divided into a filter cavity 104 and a drainage cavity 105 by the partition 301. The filter cavity 104 is located above the drainage cavity 105. The filter cavity 104 is connected to the liquid inlet pipe 102, and the liquid outlet pipe 102 and the drainage cavity 105 are connected to each other. A plurality of mounting tubes 302 are evenly arranged on the partition 301. The filter cavity 104 and the drainage cavity 105 are connected to each other through the mounting tube 302. The mounting tube 302 is internally threadedly connected with a connecting tube 303, and the connecting tube 303 extends out of the mounting tube 302. A fine filter tube 304 located in the filter cavity 104 is fixed at one end of the connecting tube 303 extending out of the mounting tube 302. The inner cavity of the fine filter tube 304 is hollow and opens toward one side of the connecting tube 303. The inner cavities of the fine filter tube 304, the connecting tube 303, and the mounting tube 302 are connected to each other.

[0038] like Figure 3 and Figure 4 and Figure 5 The fuel oil flows into the filter cavity 104 through the coarse filter basket 201, and fine impurities will be retained in the filter cavity 104. Outside the fine filter tube 304, the fuel oil after fine filtration enters the inner cavity of the fine filter tube 304, and then enters the drainage cavity 105 through the connecting tube 303. By setting a plurality of fine filter tubes 304, the filtering area of ​​the fuel oil is increased, and the filtering efficiency of the fuel oil is improved.

[0039] like Figure 3 and Figure 4 A lower annular plate 5 is fixed to the lower side of the inner cavity groove wall of the primary filtering tank body 1, and a partition 301 is placed on the lower annular plate 5. An annular clamping block adapted to the lower annular plate 5 is provided on the side of the partition 301 facing the lower annular plate 5. The annular clamping block is tightly connected to the lower annular plate 5. A guide tube 6 is fixed to the top of the fine filter tube 304, and a plurality of protruding tubes 204 adapted to the guide tube 6 are provided at the bottom of the coarse filter basket 201. The guide tube 6 is inserted into the protruding tube 204 and is connected to the protruding tube 204 by clamping.

[0040] like Figure 2 and Figure 3 and Figure 4 The lower annular plate 5 supports the partition 301, which is convenient for cleaning the primary filter tank body 1. The partition 301 is connected to the lower annular plate 5 by an annular clamping block. Even if the coarse filter basket 201 is taken out, the fine filter tube 304 and the partition 301 will not fall over. When the coarse filter basket 201 is installed in the inner cavity of the primary filter tank body 1, the guide tube 6 is inserted into the protruding tube 204. The protruding tube 204 and the coarse filter basket 201 improve the stability of the fine filter tube 304 without affecting the filtration of the coarse filter basket 201.

[0041] like Figure 1 and Figure 2 and Figure 3 and Figure 4A secondary filter assembly 7 for further screening the fuel oil in the filter cavity 104 is provided beside the primary filter tank body 1 .

[0042] like Figure 1 and Figure 2 and Figure 3 and Figure 4 After the device has been used for a period of time, impurities adhere to the fine filter tube 304, resulting in poor filtering effect of the fine filter tube 304, and part of the fuel oil mixed with impurities remains in the filter cavity 104. In order to further remove the fuel oil mixed with impurities in the filter cavity 104, a secondary filter component 7 is set.

[0043] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The secondary filter assembly 7 includes a secondary filter tank body 701 which is arranged beside the primary filter tank body 1 and has a hollow inner cavity. The inner cavity of the secondary filter tank body 701 is connected to the filter cavity 104 of the primary filter tank body 1 through an infusion tube 702. The infusion tube 702 is provided with a manual valve 703 for controlling the on-off of the pipeline. A filter basket 704 adapted to the secondary filter tank body 701 is placed in the inner cavity of the secondary filter tank body 701. The filter basket 704 has an inclined surface facing the infusion tube 702 and is located below the infusion tube 702. A drain pipe 705 for discharging filtered fuel oil is provided at the bottom of the secondary filter tank body 701. The top of the secondary filter tank body 701 is open. A secondary sealing cover 706 for closing the top opening of the secondary filter tank body 701 is detachably fixedly connected to the secondary filter tank body 701.

[0044] like Figure 1 and Figure 2 and Figure 3 and Figure 4 In the initial state, the manual valve 703 is closed, the liquid infusion pipe 702 is disconnected, and the fuel oil cannot enter the inner cavity of the secondary filter tank 701 through the liquid infusion pipe 702. When the fine filter tube 304 is attached with dirt and affects the filtration, the manual valve 703 is opened, the liquid infusion pipe 702 is opened, and the fuel oil in the filter cavity 104 enters the inner cavity of the secondary filter tank 701 through the liquid infusion pipe 702, and enters the filter basket 704. The fuel oil is filtered by the filter basket 704 and the filtered fuel oil is discharged through the drain pipe 705.

[0045] When in use, the fuel oil enters the inner cavity of the primary filter tank body 1 through the liquid inlet pipe 101, and directly enters the coarse filter basket 201, and will not directly enter the filter cavity 104 without passing through the coarse filter basket 201. The fuel oil is coarsely filtered through the coarse filter basket 201, and large particles of impurities will be retained in the coarse filter basket 201. The fuel oil containing fine impurities passes through the coarse filter basket 201 and enters the filter cavity 104. Then, the fine impurities are intercepted by the fine filter tube 304. The filtered fuel oil enters the inner cavity of the fine filter tube 304, and enters the drainage cavity 105 through the connecting pipe 303 and the installation pipe 302;

[0046] After the device has been used for a period of time, a large amount of dirt is accumulated in the coarse filter basket 201, which affects the filtration of the fuel oil. The sealing cover 103 is opened once, the handle 202 is grasped, the coarse filter basket 201 is taken out, and the coarse filter basket 201 is cleaned and replaced. At this time, since the fine filter tube 304 is still used to filter the fuel oil entering the filter chamber 104, the filtration efficiency of the fuel oil is not affected.

[0047] When impurities adhere to the fine filter tube 304 and affect the filtering efficiency of the fine filter tube 304, the device is shut down and the manual valve 703 is opened. The fuel oil in the filter chamber 104 will enter the secondary filter tank 701 through the infusion pipe 702 and directly enter the filter basket 704. The impurities in the fuel oil will be intercepted by the filter basket 704, and the filtered fuel oil will be discharged from the drain pipe 705, reducing the possibility that the fuel oil mixed with impurities will remain in the filter chamber 104 and cannot be filtered, thereby increasing the cost. After that, the fine filter tube 304, the coarse filter basket 201 and the filter basket 704 are cleaned.

[0048] The above specific implementations are only descriptions of the preferred implementations of the utility model, and do not limit the protection scope of the utility model. Under the premise of not departing from the design concept and spirit of the utility model, various deformations, substitutions and improvements made by ordinary technicians in this field to the technical solution of the utility model based on the text description and drawings provided by the utility model should all fall within the protection scope of the utility model. The protection scope of the utility model is determined by the claims.

Claims

1. A fuel oil filtering and impurity removal device that is easy to detect and clean, characterized in that: The invention comprises a primary filtering tank body (1) with a hollow inner cavity and an open top, wherein a liquid inlet pipe (101) is provided on the upper side of the outer periphery of the primary filtering tank body (1), a liquid outlet pipe (102) is provided at the bottom of the primary filtering tank body (1), a coarse filtering assembly (2) and a fine filtering assembly (3) arranged up and down are provided in the inner cavity of the primary filtering tank body (1), and a primary sealing cover (103) for sealing the top opening of the primary filtering tank body (1) is detachably fixedly connected to the primary filtering tank body (1); The coarse filter assembly (2) comprises a coarse filter basket (201) arranged in the inner cavity of the primary filter tank body (1); the outer wall of the coarse filter basket (201) is in contact with the inner cavity of the primary filter tank body (1); a handle (202) for taking the coarse filter basket (201) is provided on the coarse filter basket (201); and a circular hole (203) located outside the liquid inlet pipe (101) and adapted to the liquid inlet pipe (101) is provided on the side of the coarse filter basket (201) facing the liquid inlet pipe (101); An upper annular plate (4) is fixed to the inner groove wall of the primary filtering tank body (1), the coarse filter basket (201) is placed on the upper annular plate (4), the top of the coarse filter basket (201) extends out of the primary filtering tank body (1), and the end of the top of the coarse filter basket (201) extending out of the primary filtering tank body (1) contacts the top of the inner groove of the primary sealing cover (103).

2. A fuel oil filtering and impurity removal device that is easy to detect and clean according to claim 1, characterized in that: The fine filter assembly (3) comprises a partition (301), the inner cavity of the primary filter tank body (1) is divided into a filter cavity (104) and a drainage cavity (105) by the partition (301), a plurality of mounting tubes (302) are evenly arranged on the partition (301), the filter cavity (104) and the drainage cavity (105) are interconnected through the mounting tubes (302), a connecting tube (303) is connected to the mounting tube (302) through an internal thread, the connecting tube (303) extends out of the mounting tube (302), a fine filter tube (304) located in the filter cavity (104) is fixed to one end of the connecting tube (303) extending out of the mounting tube (302), the inner cavity of the fine filter tube (304) is hollow and opens toward one side of the connecting tube (303), and the inner cavity of the fine filter tube (304), the inner cavity of the connecting tube (303) and the inner cavity of the mounting tube (302) are interconnected.

3. A fuel oil filtering and impurity removal device that is easy to detect and clean according to claim 2, characterized in that: A lower annular plate (5) is fixed to the lower side of the inner cavity groove wall of the primary filtering tank body (1); the partition plate (301) is placed on the lower annular plate (5); an annular clamping block adapted to the lower annular plate (5) is provided on the side of the partition plate (301) facing the lower annular plate (5); the annular clamping block is clamped and connected to the lower annular plate (5); a guide tube (6) is fixed to the top of the fine filter tube (304); a plurality of protruding tubes (204) adapted to the guide tubes (6) are provided at the bottom of the coarse filter basket (201); the guide tubes (6) are inserted into the protruding tubes (204) and are clamped and connected to the protruding tubes (204).

4. A fuel oil filtering and impurity removal device that is easy to detect and clean according to claim 3, characterized in that: A secondary filtering assembly (7) for further screening the fuel oil in the filtering cavity (104) is provided on the side of the primary filtering tank (1).

5. A fuel oil filtering and impurity removal device that is easy to detect and clean according to claim 4, characterized in that: The secondary filter assembly (7) comprises a secondary filter tank body (701) which is arranged beside the primary filter tank body (1) and has a hollow inner cavity. The inner cavity of the secondary filter tank body (701) is connected to the filter cavity (104) of the primary filter tank body (1) via a liquid infusion pipe (702). The liquid infusion pipe (702) is provided with a manual valve (703) for controlling the on-off of the pipeline. A filter basket (704) adapted to the secondary filter tank body (701) is placed in the inner cavity of the secondary filter tank body (701). The filter basket (704) has an inclined surface facing the liquid infusion pipe (702) and is located below the liquid infusion pipe (702). A drain pipe (705) for discharging filtered fuel oil is provided at the bottom of the secondary filter tank body (701); The secondary filtering tank body (701) is open at the top, and a secondary sealing cover (706) for sealing the top opening of the secondary filtering tank body (701) is detachably fixedly connected to the secondary filtering tank body (701).

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