A long-lasting dual water separation device applied to a fuel coarse filter

Abstract

The present invention relates to a long-lasting dual water separation device applied to a fuel coarse filter, which includes a tank body, an upper cover unit assembly sealingly connected to the upper part of the tank body, and a water collecting cup sealingly connected to the lower part of the tank body. A drain valve assembly is provided at the lower end of the water collecting cup. A three-stage water separation filter element assembly is arranged in the inner cavities of the tank body and the upper cover unit assembly. A centrifugal water separation support assembly is arranged between the tank body and the water collecting cup. By adding a pre-separation structure for water, this device not only reduces the pressure on the water removal layer of the filter element, but also improves the water separation efficiency of the entire filter.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and particularly to a long - acting dual water separation device applied to a fuel coarse filter. Background Art

[0002] At present, most diesel fuels contain a certain amount of water, and the water exists in the fuel in the form of free water or emulsified water. If this water is not filtered, it will enter the engine. Besides causing incomplete combustion of the fuel, it will also cause corrosion of the entire fuel supply system, thereby affecting the service life of the engine. Therefore, a water separation structure must be designed on the fuel filter to filter the water in the fuel.

[0003] At present, most fuel filters mainly filter the water in the fuel through a filter element material with a water separation function, and there is only a single water separation function. The water separation effect is not very significant, and a small amount of water still enters the engine through the main oil passage, causing certain damage to the engine. As time goes by, the damage gradually accumulates, ultimately reducing the service life of the engine. Summary of the Invention

[0004] The purpose of the present invention is to provide a long - acting dual water separation device applied to a fuel coarse filter to solve the above problems. By adding a water pre - separation structure, not only the pressure on the water - removing layer of the filter element is reduced, but also the water separation efficiency of the entire filter is improved.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A long - acting dual water separation device applied to a fuel coarse filter includes a tank body, an upper cover unit assembly sealed to the upper part of the tank body, and a water collection cup sealed to the lower part of the tank body. A drain valve assembly is provided at the lower end of the water collection cup. A three - stage water separation filter element assembly is arranged in the inner cavities of the tank body and the upper cover unit assembly, and a centrifugal water separation support assembly is arranged between the tank body and the water collection cup.

[0007] Further, the upper end of the centrifugal water separation support assembly is sealed to the lower end inside the tank body, and the lower end of the centrifugal water separation support assembly is sealed to the inner bottom of the water collection cup, and divides the inner cavity of the water collection cup into a dirty side and a clean side.

[0008] Further, the centrifugal water separation support assembly includes an upper cover unit and a lower cover unit. The upper cover unit is composed of an outer sleeve and an inner sleeve arranged inside the outer sleeve. An oil - passing cavity is formed inside the inner sleeve, and a water - passing channel is formed between the outer sleeve and the inner sleeve.

[0009] The lower cover unit includes a cylindrical base, a conical circular plate provided at the upper end of the cylindrical base, and a rotating fin assembly provided on the conical circular plate. A clean-side water collecting cavity is formed inside the cylindrical base;

[0010] The upper cover unit is arranged above the lower cover unit, and the lower end of the inner sleeve is communicated with the rotating fin assembly, so that the fuel passing through the inner sleeve forms a rotating eddy current when passing through the rotating fin assembly and then enters the dirty side of the water collecting cup.

[0011] Further, the outer sleeve and the inner sleeve of the upper cover unit are integrally provided above the conical bottom plate, and the shape of the conical bottom plate matches that of the conical circular plate;

[0012] The rotating fin assembly is composed of a plurality of (for example, 6-9) fins vertically provided on the surface of the conical circular plate. A rotating flow channel is formed between adjacent fins; among them, at least two partitions are provided between a pair of adjacent fins, and together with the conical bottom plate, an oil-sealing cavity through which fuel cannot pass is formed. A water dropping hole communicating with the water collecting cavity of the cylindrical base is provided on the conical circular plate between the two partitions, and is communicated with the water dropping hole provided on the conical bottom plate.

[0013] Further, an installation column is provided at the center of the conical circular plate, the fins have a certain bending curvature, and the fins are arranged on the conical circular plate at equal intervals with the installation column as the center.

[0014] Further, the rotating fin assembly is symmetrically arranged on the conical circular plate, and two fin structures with partitions are symmetrically provided.

[0015] The specific working process of the centrifugal water separation support assembly is as follows:

[0016] Fuel under a certain pressure first enters the upper cover unit of the centrifugal water separator through the fuel inlet of the fuel tank. After passing through the upper cover unit, it vertically impacts the rotating fins in the lower cover unit. The fuel is split and passes through the rotating flow channels formed by the rotating fins, forming a rotating eddy current with a certain centrifugal force and centrifugal acceleration. After the fuel rushes out of the rotating flow channels, it obtains a certain initial rotational speed and impacts the inner wall. Then, under the action of the initial speed and gravity, a certain tangential speed vertically downward and a radial rotational speed are formed. The fuel rotates and descends, forming a rotating eddy current with a certain centrifugal force and centrifugal acceleration. After the fuel rushes out of the rotating flow channels, it obtains a certain initial rotational speed and impacts the inner wall of the fuel tank. Then, under the action of the initial speed and gravity, a certain tangential speed vertically downward and a radial rotational speed are formed, and the fuel rotates and descends. The density of water is greater than that of fuel. When fuel containing water passes through the rotating flow channels of the centrifugal water separation structure at a certain oil pressure, the free water and large water droplets in the fuel obtain a larger centrifugal force and centrifugal acceleration. When they leave the rotating flow channels with the fuel, they obtain a larger initial centrifugal rotational speed. With the action of gravity, the large water droplets and free water reach the bottom of the dirty side water collection space first and slowly deposit at this position. As the fuel continuously pours in, the oil-water stratification phenomenon is significant, and then the water deposits under the oil.

[0017] Further, a diversion bracket is also arranged between the fuel tank and the water collection cup. The diversion bracket is arranged on the outer side of the upper part of the centrifugal water separation bracket assembly. The diversion bracket is clamped by the fuel tank and the water collection cup.

[0018] Further, the diversion bracket is a conical circular tube structure, and diversion rib strips are arranged on the wall surface of the conical circular tube structure.

[0019] Further, the three-stage water separation filter element assembly includes a particulate impurity filtration layer, a water separation and coagulation layer, and a hydrophobic medium layer in sequence from the outside to the inside.

[0020] Further, a water level sensor is arranged in the drain valve assembly. When the water level sensor is turned on, it feeds back a signal for draining water to the terminal, and the terminal discharges water in a timely manner according to the need. The design of this drain valve assembly can also drain the water in the dirty side water collection cup at the same time.

[0021] The drain valve assembly is connected and sealed with the water collection cup through threads and seals. The upper and lower ends of the fuel tank are respectively connected and sealed with the upper cover unit and the water collection cup through threads and seals.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Improve the water separation efficiency on the dirty side: The fuel enters from the fuel inlet and forms a rotating high-speed motion through the special channels of the centrifugal water separation support assembly. The free water and large water droplets in the fuel are thrown out under the action of a large centrifugal force and then quickly settle into the dirty-side water collection space, significantly improving the water separation efficiency on the dirty side.

[0024] 2. By setting up a diversion support, with guidance on the side, the dirty oil can quickly reach the filter surface of the filter element, improving the fuel filtration efficiency.

[0025] 3. Combining with the existing three-stage water separation structure, ensuring that the water and oil separated for the second time do not mix with the dirty side, and guaranteeing the cleanliness of the fuel reaching the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the dual water separation of the diesel fuel pre-filter of the present invention;

[0027] Figure 2 、 3 is a schematic diagram of the centrifugal water separation structure of the dual water separation of the diesel fuel pre-filter of the present invention;

[0028] Figure 4 is a schematic diagram of the diversion support structure of the dual water separation of the diesel fuel pre-filter of the present invention;

[0029] Figure 5 is a schematic diagram of the working principle of the dual water separation of the diesel fuel pre-filter of the present invention;

[0030] Figure 1 Reference numerals: 1 - tank body, 2 - three-stage water separation filter element assembly, 3 - upper cover unit assembly, 4 - diversion support, 5 - centrifugal water separation structure assembly, 6 - water collection cup, 7 - drain valve assembly, 8 - fuel inlet; 9 - fuel outlet; 10 - water outlet; 51 - upper cover unit, 52 - lower cover unit, 01 - 07 are seals. DETAILED DESCRIPTION OF THE INVENTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Refer to Figure 1, A long-lasting dual water separation device applied to a fuel coarse filter, comprising a tank body 1, an upper cover unit assembly 3 sealingly connected to the upper part of the tank body 1, and a water collection cup 6 sealingly connected to the lower part of the tank body 1. A drain valve assembly 7 is provided at the lower end of the water collection cup 6. The drain valve assembly 7 is connected and sealed to the water collection cup 6 through a thread and a seal 07; the upper and lower ends of the tank body 1 are respectively connected and sealed to the upper cover unit 3 and the water collection cup 6 through threads and seals 01 and 05. A three-stage water separation filter element assembly 2 is provided in the inner cavities of the tank body 1 and the upper cover unit assembly 3, and a centrifugal water separation support assembly 5 is arranged between the tank body 1 and the water collection cup 6. Among them, the three-stage water separation filter element assembly 2 sequentially includes a particulate impurity filtration layer, a water separation and coagulation layer, and a hydrophobic medium layer 21 from the outside to the inside. A water level sensor is provided in the drain valve assembly 7. The lower end of the drain valve assembly 7 is an outlet 10. After the water level sensor is conducted, a water discharge signal is fed back to the terminal, and the terminal discharges water in a timely manner as needed, and can discharge the water in the dirty side water collection cup at the same time.

[0033] The upper end of the centrifugal water separation support assembly 5 is sealingly connected to the lower end inside the tank body 1 through a seal 02, and the lower end of the centrifugal water separation support assembly 5 is sealingly connected to the inner bottom of the water collection cup 6 through a seal 06, and the inner cavity of the water collection cup 6 is divided to form a dirty side and a clean side.

[0034] Refer to Figure 2 , 3, the specific structure of the centrifugal water separation support assembly 5 includes an upper cover unit 51 and a lower cover unit 52. The upper cover unit 51 is composed of an outer sleeve 511 and an inner sleeve 512 disposed within the outer sleeve 511. An oil passage is formed within the inner sleeve 512, and a water passage is formed between the outer sleeve 511 and the inner sleeve 512. The lower cover unit 52 includes a cylindrical base 521, a conical circular plate 522 disposed at the upper end of the cylindrical base 521, and a rotating fin assembly disposed on the conical circular plate 522. A clean side water collecting cavity is formed within the cylindrical base 521. The upper cover unit 51 is disposed above the lower cover unit 52, and the lower end of the inner sleeve 512 communicates with the rotating fin assembly, such that when the fuel passing through the inner sleeve 512 passes through the rotating fin assembly, it forms a rotating eddy and then enters the dirty side of the water collecting cup. The outer sleeve 511 and the inner sleeve 512 of the upper cover unit 51 are integrally disposed above the conical bottom plate 513, and the shape of the conical bottom plate 513 matches that of the conical circular plate 522. The rotating fin assembly is composed of 8 fins 523 vertically disposed on the surface of the conical circular plate 522, and a rotating flow channel is formed between adjacent fins 523. Among them, at least two partition plates 524 are provided between a pair of adjacent fins 523, and together with the conical bottom plate 513, they form an oil sealing cavity through which fuel cannot pass. A water dropping hole communicating with the water collecting cavity of the cylindrical base 521 is provided on the conical circular plate 522 between the two partition plates 524, and it communicates with the water dropping hole 514 provided on the conical bottom plate 513. In this embodiment, an installation post 525 is provided at the center of the conical circular plate 522, the fins 523 have a certain bending curvature, and the fins 523 are arranged on the conical circular plate 522 at equal intervals with the installation post 525 as the center. The rotating fin assembly is symmetrically disposed on the conical circular plate 522, and there are two symmetrically arranged fin structures with partition plates 524.

[0035] As Figure 4 , a guiding support 4 is provided between the tank body 1 and the water collecting cup 6. The guiding support 4 is disposed on the outer side of the upper part of the centrifugal water separation support assembly 5. The guiding support 4 is clamped by the tank body 1 and the water collecting cup 6. The guiding support 4 has a conical circular tube structure, and guiding rib strips 41 are provided on the wall surface of the conical circular tube structure, enabling the dirty oil to quickly reach the filter surface of the filter element and improving the fuel filtering efficiency.

[0036] As Figure 5, the specific working principle of the present invention is that the fuel with a certain pressure first enters the upper cover unit 51 of the centrifugal water separation through the fuel inlet 8 of the fuel tank 1, and vertically impacts the rotating fins 523 with a special structural design on the lower cover unit 52. The fuel is split and passes through the rotating flow channels formed by the rotating fins, forming a rotating eddy current with a certain centrifugal force and centrifugal acceleration. After the fuel rushes out of the rotating flow channels, it obtains a certain initial rotational speed, impacts the inner wall, and then, under the action of the initial speed and gravity, forms a certain tangential speed and radial rotational speed vertically downward, and the fuel rotates and descends. Utilizing the physical property that the density of water is greater than that of fuel, when the fuel containing moisture passes through the rotating flow channels of the centrifugal water separation structure at a certain oil pressure, the free water and large water droplets in the fuel, due to their large own density, will obtain a larger centrifugal force and centrifugal acceleration. When they leave the rotating flow channels along with the fuel, they will obtain a larger initial centrifugal rotational speed. Plus the action of gravity, the large water droplets and free water reach the bottom of the dirty side water collection space first and slowly deposit at this position. As the fuel continuously surges in, the oil-water stratification phenomenon is significant, and then the water deposits under the oil. The fuel continues to climb and quickly fills the dirty side water collection cup. The fuel liquid level continues to rise and quickly reaches the surface of the three-stage water separation filter element assembly 2 through the guide bracket 4. The fuel filters out harmful impurities and large particles in the fuel through the particle impurity filtration layer. The fuel enters the water separation and aggregation layer, aggregating the emulsified water and small water droplets in the fuel into larger water droplets with a certain particle size. When the fuel comes out of the aggregation layer, it reaches the hydrophobic medium layer 21 made of a special film. The fuel continues to pass through the hydrophobic medium, through the main oil passage of the clean side oil outlet 9 of the filter, and enters the next filtration system; while the larger water droplets condensed by the aggregation layer are intercepted and stay in the settlement space between the aggregation layer and the hydrophobic layer. These water droplets, due to the action of their own gravity, slowly deposit at the bottom of the clean side water collection space of the water collection cup 6 along the settlement channels designed by the fuel tank 1 and the centrifugal water separation support assembly 5. As the fuel is continuously supplied, more water is deposited in this space, and the oil and water are stratified, with the water accumulating at the bottom of the fuel. As the water accumulates more and more, the liquid level of the water rises slowly continuously. When the liquid level of the water reaches the set height of the water level sensor of the drain valve assembly 7, the water level sensor is turned on, feeding back the signal of needing to drain water to the terminal, and the terminal drains water in a timely manner according to the need.

[0037] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A long-lasting dual water separation device applied to a fuel coarse filter, comprising a tank body (1), an upper cover unit assembly (3) sealingly connected to the upper part of the tank body (1), and a water collecting cup (6) sealingly connected to the lower part of the tank body (1). A drain valve assembly (7) is provided at the lower end of the water collecting cup (6). A three-stage water separation filter element assembly (2) is arranged in the inner cavities of the tank body (1) and the upper cover unit assembly (3), characterized in that, A centrifugal water separation support assembly (5) is provided between the tank body (1) and the water collecting cup (6); The centrifugal water separation support assembly (5) includes an upper cover unit (51) and a lower cover unit (52), The upper cover unit (51) is composed of an outer sleeve (511) and an inner sleeve (512) disposed within the outer sleeve (511). An oil passage is formed within the inner sleeve (512), and a water passage is formed between the outer sleeve (511) and the inner sleeve (512); The lower cover unit (52) includes a cylindrical base (521), a conical circular plate (522) disposed at the upper end of the cylindrical base (521), and a rotating fin assembly disposed on the conical circular plate (522). A clean-side water collecting cavity is formed within the cylindrical base (521); The upper cover unit (51) is disposed above the lower cover unit (52), and the lower end of the inner sleeve (512) is connected to the rotating fin assembly. When the fuel passing through the inner sleeve (512) passes through the rotating fin assembly, it forms a rotating vortex and then enters the dirty side of the water collecting cup; The outer sleeve (511) and the inner sleeve (512) of the upper cover unit (51) are integrally disposed above the conical bottom plate (513), and the conical bottom plate (513) is matched in shape with the conical circular plate (522); The rotating fin assembly is composed of a plurality of fins (523) vertically disposed on the surface of the conical circular plate (522). A rotating flow channel is formed between adjacent two fins (523); Among them, at least two partitions (524) are provided between a pair of adjacent fins (523), and together with the conical bottom plate (513), they form an oil-sealing cavity through which fuel cannot pass. The conical circular plate (522) between the two partitions (524) is provided with a water-droplet hole communicating with the water collecting cavity of the cylindrical base (521), and is also communicated with the water-droplet hole (514) disposed on the conical bottom plate (513); The three-stage water separation filter element assembly (2) sequentially includes a particulate impurity filtration layer, a water separation and coagulation layer, and a hydrophobic medium layer from the outside to the inside.

2. The long-acting dual water separation device applied to a fuel coarse filter according to claim 1, characterized in that, The upper end of the centrifugal water separation support assembly (5) is hermetically connected to the lower end inside the tank body (1), and the lower end of the centrifugal water separation support assembly (5) is hermetically connected to the bottom inside the water collecting cup (6), and divides the inner cavity of the water collecting cup (6) into a dirty side and a clean side.

3. A long-lasting dual water separation device applied to a fuel coarse filter according to claim 1, characterized in that, An installation column (525) is provided at the center of the conical circular plate (522). The fins (523) have a certain bending curvature, and the fins (523) are arranged at equal intervals around the installation column (525) on the conical circular plate (522).

4. The long-acting dual water separation device applied to a fuel coarse filter according to claim 3, characterized in that, The rotating fin assembly is symmetrically disposed on the conical circular plate (522), and there are two symmetrically arranged fin structures with partitions (524).

5. The long-lasting dual water separation device applied to a fuel coarse filter according to claim 1, characterized in that, A diversion support (4) is further provided between the tank body (1) and the water collecting cup (6). The diversion support (4) is disposed outside the upper part of the centrifugal water separation support assembly (5), and the diversion support (4) is clamped by the tank body (1) and the water collecting cup (6).

6. The long-acting dual water separation device applied to a fuel coarse filter according to claim 5, characterized in that, The flow guiding support (4) is of a conical circular tube structure, and flow guiding ribs (41) are arranged on the wall surface of the conical circular tube structure.

7. The long-acting dual water separation device applied to a fuel coarse filter according to claim 1, characterized in that, A water level sensor is arranged in the water discharge valve assembly (7); The water discharge valve assembly (7) is connected and sealed with the water collecting cup (6) through threads and seals; The upper and lower ends of the tank body (1) are respectively connected and sealed with the upper cover unit assembly (3) and the water collecting cup (6) through threads and seals.

Images