A helical multi-layer filter for fuel liquids

Abstract

The utility model discloses a spiral multilayer filter of fuel oil liquid relates to fuel filter technical field. The utility model discloses a shell is provided with filter cylinder in its inside, and the both ends of filter cylinder are linked with feeding portion and discharge portion intercommunication respectively, and the inside linear array of filter cylinder is provided with filter plate, and the inside linear array of filter cylinder is provided with spiral filter core, and spiral filter core is located between two filter plates and is linked with it. The utility model discloses a linear array combination of filter plate and spiral filter core, and the upstream filter plate can intercept big particle impurity first, avoids its jamming spiral filter core fine hole, and the filter core of spiral structure can maximize filter area, prolongs the saturation period of taking in the pollution, realizes the layered interception to small impurity simultaneously, realizes the ladder type filtering effect of rough filter and fine filter finally, improves fuel cleanliness greatly, reduces the wear and tear of engine fuel injection nozzle, fuel pump and other precision parts, thereby realizes and improves the filtering efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of fuel filtration, specifically, it relates to a spiral multilayer filter for fuel liquid. Background Technology

[0002] Fuel filters play a vital role in modern, forgiving engine fuel systems. Unfiltered fuel can contain a variety of contaminants, such as paint chips and dirt that may have been knocked into the fuel tank during refueling, or rust caused by moisture in the steel fuel tank.

[0003] Traditional fuel filters can filter large particles such as mud and metal shavings, but they cannot filter out tiny gum particles and water in the fuel (especially water that easily mixes into diesel fuel, which can cause fuel injector corrosion and engine knocking). If it is necessary to filter out tiny impurities or water, a special filter (such as an oil-water separator or a high-precision ceramic filter element) must be installed, which increases the complexity and cost of the system.

[0004] In view of this, this utility model is hereby proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a spiral multilayer filter for fuel liquid.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: A spiral multilayer filter for fuel liquid includes a housing, with a feed inlet at one end and a T-shaped cover movably connected to the other end. A discharge outlet is located on one side of the T-shaped cover. A filter cylinder is disposed inside the housing, with its two ends connected to the feed inlet and discharge outlet, respectively. Filter plates are arranged in a linear array inside the filter cylinder, and a spiral filter element is arranged in a linear array inside the filter cylinder, with the spiral filter element located between and connected to two filter plates. A reset part is provided on one side of the inner wall of the housing to abut against the filter cylinder.

[0007] Optionally, the feeding section includes an oil inlet pipe installed at one end of the housing, and the oil inlet pipe is equipped with a threaded mounting pipe.

[0008] Optionally, sealing grooves are provided at both ends of the filter cylinder, and the oil outlet of the oil inlet pipe is connected to one of the sealing grooves.

[0009] Optionally, the discharge section includes a connecting pipe installed on one side of the T-shaped cover. One end of the connecting pipe passes through the T-shaped cover and is connected to another sealing groove. The other end of the connecting pipe is equipped with a transfer pump that cooperates with it. The oil outlet of the transfer pump is equipped with an oil outlet pipe.

[0010] Optionally, the filter cylinder is equipped with two fixing rods inside, and the filter plate is mounted on the two fixing rods.

[0011] Optionally, the reset part includes a groove formed on one side of the inner wall of the housing, an annular top plate slidingly fitted inside the groove, the annular top plate being in contact with one end of the filter cylinder, a spring being installed between the annular top plate and one side of the inner wall of the groove, and a limiting telescopic rod being circumferentially arranged between the annular top plate and one side of the inner wall of the groove.

[0012] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time: By employing a linear array combination of filter plates and spiral filter elements, the upstream filter plates can first intercept large particles of impurities, preventing them from clogging the fine pores of the spiral filter elements; the spiral structure of the filter elements can maximize the filtration area, extend the dirt-holding saturation cycle, and simultaneously achieve layered interception of fine impurities, ultimately achieving a stepped filtration effect of coarse and fine filtration, significantly improving fuel cleanliness, reducing wear on precision components such as engine injectors and fuel pumps, thereby achieving and improving filtration efficiency.

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 A schematic diagram of the spiral multilayer filter for fuel liquid provided in this application; Figure 2 A cross-sectional structural schematic diagram of the spiral multilayer filter for fuel liquid provided in this application; Figure 3 A schematic diagram of the discharge section structure of the spiral multilayer filter for fuel liquid provided in this application; Figure 4 A schematic diagram of the reset section structure of the spiral multilayer filter for fuel liquid provided in this application; The attached diagram lists the components represented by each number as follows: 1. Outer shell; 2. Oil inlet pipe; 3. Threaded mounting pipe; 4. T-shaped cover; 5. Oil outlet pipe; 6. Connecting pipe; 7. Transfer pump; 8. Filter cylinder; 9. Fixing rod; 10. Filter plate; 11. Spiral filter element; 12. Sealing groove; 13. Groove; 14. Top plate; 15. Spring; 16. Limiting telescopic rod.

[0015] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Please see Figure 1-4 As shown, this embodiment provides a spiral multilayer filter for fuel liquid, including a housing 1. One end of the housing 1 is provided with a feed section, and the other end of the housing 1 is movably connected to a T-shaped cover 4. One side of the T-shaped cover 4 is provided with a discharge section. The housing 1 is provided with a filter cylinder 8 inside, and the two ends of the filter cylinder 8 are respectively connected to the feed section and the discharge section. The filter cylinder 8 is provided with a filter plate 10 arranged in a linear array inside, and a spiral filter element 11 is arranged in a linear array inside the filter cylinder 8. The spiral filter element 11 is located between and connected to two filter plates 10. A reset part is provided on one side of the inner wall of the housing 1 to abut against the filter cylinder 8.

[0018] One application of this embodiment is as follows: The fuel to be filtered first enters the filter through the feed section at one end of the outer shell 1. After being movably connected to the outer shell 1 by the T-shaped cover 4, a sealed space is formed. The fuel cannot leak or bypass in the gap between the outer shell 1 and the filter cylinder 8, and can only be forcibly introduced into the filter cylinder 8. When the fuel enters the filter cylinder 8, it will pass through the internal linear array of filter plates 10 and spiral filter element 11 in sequence. In the first step of coarse filtration, the fuel first contacts the outer layer of the spiral filter element 11, and the pore size is relatively large, which preferentially intercepts large-volume impurities and reduces the load on subsequent fine filtration. Then, in the second step of fine filtration, the fuel that has passed through the coarse filter flows along the spiral channel of the spiral filter element 11 towards the center. The flow of the fuel through the filter cylinder 8 facilitates longer contact time and improves filtration efficiency. The inner filter element with smaller pores captures tiny particles. The filter plate 10 not only separates adjacent filter units and prevents impurities from mixing, but also fixes the axial position of the spiral filter element 11 to prevent it from deforming due to fluid impact. After being purified by all the filter plates 10 and spiral filter elements 11 in the filter cylinder 8, the clean fuel with impurities removed flows directly along the through flow channel of the filter cylinder 8 to the discharge section on one side of the T-shaped cover 4, and is finally output to the subsequent fuel system. During the entire discharge process, the fuel does not come into contact with other areas inside the outer shell 1, avoiding secondary pollution, thereby achieving and improving filtration efficiency.

[0019] The feeding section of this embodiment includes an oil inlet pipe 2 installed at one end of the outer shell 1, and a threaded mounting pipe 3 is installed on the oil inlet pipe 2; both ends of the filter cylinder 8 are provided with sealing grooves 12, and the oil outlet of the oil inlet pipe 2 is connected to one of the sealing grooves 12; the discharging section includes a connecting pipe 6 installed on one side of the T-shaped cover 4, one end of the connecting pipe 6 passes through the T-shaped cover 4 and is connected to the other sealing groove 12, and the other end of the connecting pipe 6 is provided with a transfer pump 7 that cooperates with it, and the oil outlet of the transfer pump 7 is provided with an oil outlet pipe 5.

[0020] The threaded mounting pipe 3 on the inlet pipe 2 seals the filter to the external fuel delivery line. The inlet pipe 2 leads to one end of the filter cylinder 8, and the outlet of the inlet pipe 2 connects with one of the sealing grooves 12 of the filter cylinder 8. This makes the sealing groove 12 form the first sealing interface, preventing fuel leakage at the connection between the inlet pipe 2 and the filter cylinder 8. After the fuel has undergone multi-stage purification by the spiral filter element 11 inside the filter cylinder 8, it will flow to the end of the filter cylinder 8. Then, after the transfer pump 7 starts, it generates negative pressure inside to draw the clean fuel in the connecting pipe 6 into the pump body. After being pressurized, it is delivered to the outlet pipe 5 through the outlet of the transfer pump 7, and finally directed to the downstream system through the outlet pipe 5.

[0021] In this embodiment, the filter cylinder 8 is equipped with two fixing rods 9, and the filter plate 10 is mounted on the two fixing rods 9.

[0022] The fixing rod 9 ensures that the spacing between adjacent filter plates 10 is uniform through the preset installation points, thereby ensuring that the spiral filter element 11 clamped in the middle always maintains a stable shape, ensuring the filtration area and flow channel of the spiral filter element 11 are unobstructed, and avoiding the decrease in filtration accuracy due to the deformation of the spiral filter element 11.

[0023] The reset part of this embodiment includes a groove 13 formed on one side of the inner wall of the outer shell 1. An annular top plate 14 is slidably fitted inside the groove 13. The annular top plate 14 is attached to one end of the filter cylinder 8. A spring 15 is installed between the annular top plate 14 and one side of the inner wall of the groove 13. A limiting telescopic rod 16 is circumferentially arranged between the annular top plate 14 and one side of the inner wall of the groove 13.

[0024] When it is necessary to remove the filter cylinder 8, loosen the movable connection between the T-shaped cover 4 and the outer shell 1, and remove the T-shaped cover 4 as a whole. At this time, the connecting pipe 6 separates from the sealing groove 12 at the other end of the filter cylinder 8, releasing the constraint on the filter cylinder 8. After the cover is removed, the filter cylinder 8 is only subjected to the pushing force applied by the reset spring 15 through the annular top plate 14, which makes it easier to remove the filter cylinder 8. At this time, the filter cylinder 8 moves towards the opening, and the limiting telescopic rod 16 restricts the movement direction of the annular top plate 14. At the same time, the sealing groove 12 at one end of the filter cylinder 8 separates from the oil outlet of the oil inlet pipe 2. Then continue to pull the filter cylinder 8 to completely detach it from the inside of the outer shell 1. The filter cylinder 8 can be installed by performing the above reverse operation.

[0025] During operation, fuel filters can filter large particles such as mud and metal shavings, but they cannot filter out tiny gum particles and water in the fuel (especially water that easily mixes into diesel fuel, which can lead to injector corrosion and engine knocking). If it is necessary to filter out tiny impurities or water, a special filter (such as an oil-water separator or a high-precision ceramic filter element) must be installed, which increases the system complexity and cost. In this solution, the fuel to be filtered first enters the filter through the feed section at one end of the outer shell 1. After being movably connected to the outer shell 1 by the T-shaped cover 4, a sealed space is formed. The fuel cannot leak or bypass in the gap between the outer shell 1 and the filter cylinder 8, and can only be forced into the filter cylinder 8. When the fuel enters the filter cylinder 8, it will pass through the internal linear array of filter plates 10 and spiral filter elements 11 in sequence. The first step of coarse filtration is carried out by the fuel first receiving The outer layer of the spiral filter element 11 has a larger pore size, which preferentially intercepts large-volume impurities, reducing the load on subsequent fine filtration. Then, in the second fine filtration step, the fuel that has passed through the coarse filter flows towards the center along the spiral flow channel of the spiral filter element 11, which facilitates extending the contact time and improving filtration efficiency. Then, it passes through the inner layer of the filter element with a smaller pore size to capture tiny particles. However, the filter plate 10 not only separates adjacent filter units and prevents impurities from mixing, but also fixes the axial position of the spiral filter element 11 to prevent it from deforming due to fluid impact. After being purified by all the filter plates 10 and spiral filter elements 11 in the filter cylinder 8, the clean fuel with impurities removed flows directly to the discharge section on one side of the T-shaped cover 4 along the through flow channel of the filter cylinder 8, and is finally output to the subsequent fuel system. During the entire discharge process, the fuel does not come into contact with other areas inside the outer shell 1, avoiding secondary pollution.

[0026] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A spiral multilayer filter for fuel oil, characterized in that, include: The outer shell (1) has a feeding part at one end and a T-shaped cover (4) movably connected to the other end. A discharge part is provided on one side of the T-shaped cover (4). A filter cylinder (8) is provided inside the outer shell (1), and the two ends of the filter cylinder (8) are connected to the feeding part and the discharge part respectively. A filter plate (10) is arranged in a linear array inside the filter cylinder (8). A spiral filter element (11) is arranged in a linear array inside the filter cylinder (8), and the spiral filter element (11) is located between and connected to the two filter plates (10). A reset part that abuts against the filter cylinder (8) is provided on one side of the inner wall of the outer shell (1).

2. The spiral multilayer filter for fuel liquid according to claim 1, characterized in that, The feeding section includes an oil inlet pipe (2) installed at one end of the outer casing (1), and a threaded mounting pipe (3) is installed on the oil inlet pipe (2).

3. A spiral multilayer filter for fuel liquid according to claim 2, characterized in that, Both ends of the filter cylinder (8) are provided with sealing grooves (12), and the oil outlet of the oil inlet pipe (2) is connected to one of the sealing grooves (12).

4. A spiral multilayer filter for fuel liquid according to claim 3, characterized in that, The discharge section includes a connecting pipe (6) installed on one side of the T-shaped cover (4). One end of the connecting pipe (6) passes through the T-shaped cover (4) and is connected to another sealing groove (12). The other end of the connecting pipe (6) is equipped with a transfer pump (7) that cooperates with it. The oil outlet of the transfer pump (7) is equipped with an oil outlet pipe (5).

5. A spiral multilayer filter for fuel liquid according to claim 1, characterized in that, The filter cylinder (8) is equipped with two fixed rods (9), and the filter plate (10) is mounted on the two fixed rods (9).

6. A spiral multilayer filter for fuel oil according to claim 1, characterized in that, The reset part includes a groove (13) opened on one side of the inner wall of the outer shell (1). An annular top plate (14) is slidably fitted inside the groove (13). The annular top plate (14) is attached to one end of the filter cylinder (8). A spring (15) is installed between the annular top plate (14) and one side of the inner wall of the groove (13). A limiting telescopic rod (16) is circumferentially arranged between the annular top plate (14) and one side of the inner wall of the groove (13).

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