Integrated filter seat of two-stage diesel prefilter

Abstract

The utility model discloses an integrated filter seat of a two-stage diesel pre-filter, belongs to the technical field of two-stage diesel pre-filters, and solves the problems of large occupied space and large oil transportation resistance of the existing two-stage pre-filter. The integrated filter seat comprises a filter seat body, the filter seat body comprises a base and two mounting bases, the two mounting bases are provided with a first-stage prefilter and a second-stage prefilter respectively, one mounting base is provided with a first oil inlet pipe and a first oil outlet pipe, and the other mounting base is provided with a second oil outlet pipe. One mounting base is provided with a first oil inlet pipe and a first oil outlet pipe, the first oil inlet pipe is communicated with the input end of the first-stage prefilter, the first oil outlet pipe is communicated with the output end of the first-stage prefilter, the other mounting base is provided with a second oil inlet pipe and a second oil outlet pipe, and the second oil inlet pipe is communicated with the input end of the second-stage prefilter. The integrated filter seat of the two-stage diesel prefilter is high in integration degree, effectively reduces installation space, and effectively reduces oil transportation resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of double-stage diesel prefilters, in particular to an integrated filter seat of a double-stage diesel prefilter. Background Art

[0002] Trucks or construction machinery powered by diesel engines generally have two-stage filters (one pre-filter and one fine filter) or three-stage filters (two pre-filters and one fine filter) in their fuel systems. Compared with two-stage filters, three-stage filters help extend the maintenance cycle of filters, but one more filter means longer fuel channels and greater fuel delivery resistance. For engines, the lower the fuel delivery resistance, the smaller the power loss, and the more power the engine can output. Taking a certain fuel pump as an example, it requires that the fuel delivery resistance must be controlled within the range of ≤30kPa. If this range is exceeded, the engine is likely to be "powerless". Excluding the resistance occupied by the fuel line in the fuel system, the original resistance of the two-stage pre-filter should be controlled within the range of ≤20kPa, but most of the current two-stage filters use fuel lines to connect the pre-filter and fine filter. The fuel line layout occupies a large space and is heavy, and the fuel delivery resistance is large. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an integrated filter seat for a two-stage diesel pre-filter in view of the above-mentioned deficiencies in the prior art, which has a high degree of integration, effectively reduces the installation space, and effectively reduces the oil transfer resistance, and has the characteristics of wide application range and strong practicality.

[0004] The technical solution adopted by the utility model is: an integrated filter seat of a two-stage diesel pre-filter, including a filter seat body, the filter seat body including a base and two mounting bases, a first-stage pre-filter and a second-stage pre-filter are respectively mounted on the two mounting bases, one of the mounting bases is provided with a first oil inlet pipe and a first oil outlet pipe, the first oil inlet pipe is connected to the input end of the first-stage pre-filter, the first oil outlet pipe is connected to the output end of the first-stage pre-filter, the other mounting base is provided with a second oil inlet pipe and a second oil outlet pipe, the second oil inlet pipe is connected to the input end of the second-stage pre-filter, the second oil outlet pipe is connected to the output end of the second-stage pre-filter, a one-way valve is provided on the second oil outlet pipe, the first oil outlet pipe is connected to the second oil inlet pipe, a bypass oil pipe connected to the output end of the second-stage pre-filter is provided on the mounting base, and the bypass oil pipe and the second oil outlet pipe are connected through an oil filter channel.

[0005] As a further improvement, an electronic oil pump is provided on the oil filter channel.

[0006] Furthermore, the oil filter channel is arranged between the two mounting bases, and the connecting pipe between the first oil outlet pipe and the second oil inlet pipe is connected to the bottom of the oil filter channel.

[0007] Furthermore, reinforcing ribs are provided between the base and the mounting base.

[0008] Furthermore, an oil-passing hole is provided in the oil filter channel, one end of the oil-passing hole is communicated with the bypass oil pipe, and the other end of the oil-passing hole is communicated with the second oil outlet pipe.

[0009] Furthermore, the distance between the central axes of the two mounting bases is greater than the sum of the radii of the first-stage pre-filter and the second-stage pre-filter.

[0010] Beneficial Effects

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses an integrated filter seat of a double-stage diesel pre-filter. When the engine is in a pre-start state, the fuel enters the first-stage pre-filter from the first oil inlet pipe, and then flows from the first oil outlet pipe to the second oil inlet pipe after being filtered, and flows from the second oil inlet pipe into the second-stage pre-filter. After filtering, the one-way valve is in a closed state under the action of the internal spring force, and the fuel enters the oil filter channel through the bypass oil pipe, and then flows out from the second oil outlet pipe after passing through the electronic oil pump. After the engine is started, when the electronic oil pump on the filter seat is in a non-working state, the fuel enters the first-stage pre-filter from the first oil inlet pipe, and then After filtering, it flows from the first oil outlet pipe to the second oil inlet pipe, and then flows into the second-stage pre-filter from the second oil inlet pipe. At this time, under the suction force generated by the engine oil pump, the one-way valve overcomes the spring force and is forced to open, and the fuel flows out from the second oil outlet pipe through the one-way valve. This structure is compactly arranged and effectively shortens the length of the oil channel. The oil channel aperture in the filter seat can be adjusted according to demand to reduce the oil delivery resistance and meet the use function of the filter seat. By arranging the electronic oil pump downstream of the two-stage pre-filter, the erosion of the electronic oil pump by water and impurities is avoided, and its life is extended. It is easy to use and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the fuel flow direction before the engine of the utility model is started;

[0015] Figure 3 This is a schematic diagram of the fuel flow direction after the engine of the utility model is started;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0017] Among them: 1-base, 2-mounting base, 3-first oil outlet pipe, 4-first oil inlet pipe, 5-electronic oil pump, 6-oil filter channel, 7-bypass oil pipe, 8-second oil inlet pipe, 9-second oil outlet pipe, 10-check valve, 11-second stage pre-filter, 12-first stage pre-filter, 13-reinforcement rib, 14-oil hole. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0019] See also Figure 1-4 As shown, the utility model is an integrated filter seat of a double-stage diesel pre-filter, including a filter seat body, the filter seat body including a base 1 and two mounting bases 2, the two mounting bases 2 are respectively mounted with a first-stage pre-filter 12 and a second-stage pre-filter 11, one of the mounting bases 2 is provided with a first oil inlet pipe 4 and a first oil outlet pipe 3, the first oil inlet pipe 4 is connected to the input end of the first-stage pre-filter 12, the first oil outlet pipe 3 is connected to the output end of the first-stage pre-filter 12, and the other mounting base 2 is provided with a second oil inlet pipe 8 and a second oil outlet pipe 9 The second oil inlet pipe 8 is connected to the input end of the second-stage pre-filter 11, the second oil outlet pipe 9 is connected to the output end of the second-stage pre-filter 11, a one-way valve 10 is provided on the second oil outlet pipe 9, the first oil outlet pipe 3 is connected to the second oil inlet pipe 8, a bypass oil pipe 7 connected to the output end of the second-stage pre-filter 11 is provided on the mounting base 2, and the bypass oil pipe 7 and the second oil outlet pipe 9 are connected through the oil filter channel 6. When the engine is in the pre-start state, the fuel enters the first-stage pre-filter 12 from the first oil inlet pipe 4, and then passes through the first oil outlet pipe 3 after being filtered. The fuel flows to the second oil inlet pipe 8, and flows into the second stage pre-filter 11 from the second oil inlet pipe 8. After filtering, the one-way valve 10 is in a closed state under the action of the internal spring force. The fuel enters the oil filter channel 6 through the bypass oil pipe 7, and then flows out from the second oil outlet pipe 9 after passing through the electronic oil pump 5. After the engine is started, when the electronic oil pump 5 on the filter seat is in a non-working state, the fuel enters the first stage pre-filter 12 from the first oil inlet pipe 4, and then flows from the first oil outlet pipe 3 to the second oil inlet pipe 8 after filtering, and flows from the second oil inlet pipe 8 into the Second-stage pre-filter 11. At this time, under the suction force generated by the engine oil pump, the one-way valve 10 is forced to open by overcoming the spring force, and the fuel flows out from the second oil outlet pipe 9 through the one-way valve 10. This structure is compactly arranged, occupies a small space, and is easy to install; it effectively shortens the length of the oil channel, and the oil channel aperture in the filter seat can be adjusted according to demand to reduce the oil delivery resistance. While meeting the use function of the filter seat, by arranging the electronic oil pump 5 downstream of the two-stage pre-filter, the erosion of the electronic oil pump 5 by water and impurities is avoided, thereby extending its life.

[0020] Specifically, an electronic oil pump 5 is provided on the oil filter channel 6 for pressurizing and delivering the fuel to reduce resistance in the pipeline, which helps to start the engine.

[0021] Preferably, the oil filter channel 6 is arranged between the two mounting bases 2, and the connecting pipe between the first oil outlet pipe 3 and the second oil inlet pipe 8 is connected to the bottom of the oil filter channel 6, so that the oil filter channel 6 is arranged more compactly, the length of the pipelines on both sides is shortened, and the oil transportation resistance is reduced.

[0022] Furthermore, a reinforcing rib 13 is provided between the base 1 and the mounting base 2 to enhance the mechanical strength of the filter base and increase its service life.

[0023] Furthermore, an oil hole 14 is provided in the oil filter channel 6, one end of the oil hole 14 is connected to the bypass oil pipe 7, and the other end of the oil hole 14 is connected to the second oil outlet pipe 9. The electronic oil pump 5 is installed on one end of the oil hole 14. When the fuel flows through the oil hole 14, it flows out from the second oil outlet pipe 9 after being pressurized by the electronic oil pump 5.

[0024] Furthermore, the distance between the central axes of the two mounting bases 2 is greater than the sum of the radii of the first-stage prefilter 12 and the second-stage prefilter 11, so that a certain gap is reserved between the first-stage prefilter 12 and the second-stage prefilter 11 to ensure that the prefilters can be easily and quickly disassembled.

[0025] When the integrated filter seat of the dual-stage diesel pre-filter of the present embodiment is in use, when the engine is in the pre-start state (i.e., the engine is powered on but not ignited), the fuel enters the first-stage pre-filter 12 from the first oil inlet pipe 4, and then flows from the first oil outlet pipe 3 to the second oil inlet pipe 8 after being filtered, and flows from the second oil inlet pipe 8 to the second-stage pre-filter 11. After filtering, the one-way valve 10 is in a closed state under the action of the internal spring force, and the fuel enters the oil filter channel 6 through the bypass oil pipe 7, and then flows out from the second oil outlet pipe 9 after passing through the electronic oil pump 5. After the engine is started, when the electronic oil pump 5 on the filter seat is in a non-working state, the fuel flows from the first oil outlet pipe 3 to the second oil filter 11. An oil inlet pipe 4 enters the first-stage pre-filter 12, and then flows from the first oil outlet pipe 4 to the second oil inlet pipe 8 after filtering, and flows from the second oil inlet pipe 8 into the second-stage pre-filter 11. At this time, under the suction force generated by the engine oil pump, the one-way valve 10 overcomes the spring force and is forced to open, and the fuel flows out from the second oil outlet pipe 8 through the one-way valve 10. This structure is compactly arranged and effectively shortens the length of the oil channel. The oil channel aperture in the filter seat can be adjusted according to demand to reduce the oil delivery resistance. When the use function of the filter seat can be met, the electronic oil pump 5 is arranged downstream of the two-stage pre-filter to avoid water and impurities from corroding the electronic oil pump 5 and extend its life. The integrated filter seat of the two-stage diesel pre-filter of the utility model has a high degree of integration, effectively reduces the installation space, and effectively reduces the oil delivery resistance. It has the characteristics of wide application range and strong practicality.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An integrated filter seat for a dual-stage diesel pre-filter, It is characterized in that The filter seat body comprises a base (1) and two mounting bases (2), a first-stage pre-filter (12) and a second-stage pre-filter (11) are mounted on the two mounting bases (2), one of the mounting bases (2) is provided with a first oil inlet pipe (4) and a first oil outlet pipe (3), the first oil inlet pipe (4) is connected to the input end of the first-stage pre-filter (12), the first oil outlet pipe (3) is connected to the output end of the first-stage pre-filter (12), and the other mounting base (2) is provided with a second oil inlet pipe (4). The second oil inlet pipe (8) is connected to the input end of the second-stage pre-filter (11), and the second oil outlet pipe (9) is connected to the output end of the second-stage pre-filter (11). The second oil outlet pipe (9) is provided with a one-way valve (10). The first oil outlet pipe (3) is connected to the second oil inlet pipe (8). The mounting base (2) is provided with a bypass oil pipe (7) connected to the output end of the second-stage pre-filter (11). The bypass oil pipe (7) and the second oil outlet pipe (9) are connected via an oil filter channel (6).

2. The integrated filter seat of a dual-stage diesel prefilter according to claim 1, It is characterized in that The oil filter channel (6) is provided with an electronic oil delivery pump (5).

3. The integrated filter seat of a dual-stage diesel prefilter according to claim 1, It is characterized in that The oil filter channel (6) is arranged between the two mounting bases (2), and the connecting pipe between the first oil outlet pipe (3) and the second oil inlet pipe (8) is connected to the bottom of the oil filter channel (6).

4. The integrated filter seat of a dual-stage diesel prefilter according to claim 1, It is characterized in that A reinforcing rib (13) is provided between the base (1) and the mounting base (2).

5. The integrated filter seat of the dual-stage diesel prefilter according to claim 3, It is characterized in that An oil hole (14) is provided in the oil filter channel (6), one end of the oil hole (14) is connected to the bypass oil pipe (7), and the other end of the oil hole (14) is connected to the second oil outlet pipe (9).

6. The integrated filter seat of a dual-stage diesel prefilter according to claim 1, It is characterized in that The distance between the central axes of the two mounting bases (2) is greater than the sum of the radii of the first-stage pre-filter (12) and the second-stage pre-filter (11).

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