Fuel filter with built-in drain

Abstract

The utility model relates to fuel filter equipment technical field proposes a kind of fuel filter with built-in drainage structure, including shell has accommodating cavity, shell has inlet and drain port;Filter core is arranged in accommodating cavity, filter core separates accommodating cavity into first separated cavity and second separated cavity;Screw tight plate is arranged at the inlet of shell, and inlet and oil outlet are opened in screw tight plate, inlet communicates first separated cavity, and oil outlet communicates second separated cavity;Oil baffle cylinder is located at the bottom of accommodating cavity and is connected at drain port, and oil baffle is located below filter core and is opened with water hole;Sealing block is placed in oil baffle cylinder and is used for plugging drain port;Spring is worn in oil baffle cylinder, and one end of spring is abutted on the bottom of filter core, and the other end is abutted on sealing block. Through the above technical scheme, the problem that the existing fuel filter is easily damaged due to the water drain valve located outside the filter is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel filtration equipment, specifically to a fuel filter with a built-in drainage structure. Background Technology

[0002] Fuel filters are key components used to filter impurities in fuel. Their main function is to remove solid impurities such as iron oxide and dust from the fuel, prevent fuel system blockage (especially fuel injectors), and ensure stable engine operation.

[0003] Commercial vehicle spin-on fuel filters are generally used for filtering diesel fuel. During the filtration process, water molecules in the diesel fuel are separated. Due to density differences, water will sink to the bottom of the filter. Most diesel fuel filters have a drain valve in the primary stage, which is threaded onto the housing to drain water. However, when the fuel filter is installed outside the vehicle, the drain valve is exposed and easily damaged by external force, losing its draining function. In some cases, the drain valve may even become impossible to remove, rendering the product unusable.

[0004] Therefore, a new fuel filter is urgently needed. Utility Model Content

[0005] This invention proposes a fuel filter with an integrated drainage structure, which solves the problem that existing fuel filters are prone to damage because the drain valve is located outside the filter.

[0006] The technical solution of this utility model is as follows: A fuel filter with a built-in drainage structure, comprising:

[0007] The outer casing has a receiving cavity, an inlet at the top of the outer casing, and a drain outlet at the bottom of the outer casing;

[0008] A filter element is disposed within the accommodating cavity, and the filter element isolates the accommodating cavity into a first separation cavity and a second separation cavity;

[0009] A screw sealing plate is provided at the entrance of the outer casing. The screw sealing plate has an oil inlet and an oil outlet. The oil inlet is connected to the first separation chamber, and the oil outlet is connected to the second separation chamber.

[0010] An oil baffle is located at the bottom of the accommodating cavity and connected to the drain outlet. The oil baffle plate is located below the filter element and has water permeable holes.

[0011] A sealing block is placed inside the oil baffle and is used to block the drain outlet;

[0012] A spring is inserted inside the oil baffle cylinder, with one end of the spring abutting against the bottom of the filter element and the other end abutting against the sealing block;

[0013] When the sealing block is pushed up by an external object and avoids the water-permeable hole, the water inside the outer casing flows through the water-permeable hole and the drain outlet.

[0014] The above technical solution involves placing the filter element inside the housing, dividing the housing into a first separation chamber and a second separation chamber. A screw-on plate is positioned on top of the filter element, with its inlet connected to the first separation chamber and its outlet connected to the second separation chamber. An oil baffle is placed within the housing and connected to a drain outlet. A sealing block is located inside the oil baffle, and a spring is located inside the oil baffle, positioned between the sealing block and the filter element. The sealing block is pressed against the drain outlet by the spring. A water permeation hole is provided on the oil baffle. When an object applies force to the sealing block through the drain outlet, the sealing block compresses the spring, thus avoiding the water permeation hole. Water from the first separation chamber enters the oil baffle through the water permeation hole and eventually flows out from the drain outlet. This drainage structure simplifies the internal drainage structure of the fuel filter, reduces the number of parts, and only requires a tool to lift the sealing block during drainage. This makes operation convenient and reduces the cost of the fuel filter.

[0015] As a further technical solution, the permeable holes are multiple and have the same height.

[0016] By using the above technical solution, setting multiple permeable holes can avoid the blockage of a single permeable hole and also increase drainage efficiency.

[0017] As a further technical solution, the plurality of water-permeable holes are arranged evenly in a circle with the axis of the oil-baffle cylinder as the center.

[0018] With the above technical solution, since the fuel filter is usually cylindrical, the water inlet holes are arranged in a circumferentially even manner, which is conducive to the liquid in the first separation chamber entering the oil baffle cylinder evenly, and then flowing out of the fuel filter from the drain port.

[0019] As a further technical solution, the bottom end of the oil baffle has a positioning protrusion, and the sealing block is pressed against the positioning protrusion by the spring to block the drain outlet.

[0020] To prevent the sealing block from detaching from the oil baffle cylinder, a positioning protrusion is provided at the bottom of the oil baffle cylinder. The spring pushes the sealing block against the positioning protrusion to prevent the sealing block from detaching from the oil baffle cylinder.

[0021] As a further technical solution, the positioning protrusion is annular.

[0022] Through the above technical solution, in order to facilitate manufacturing, the positioning protrusion is set as a ring, and the positioning protrusion and the oil baffle are an integral structure.

[0023] As a further technical solution, there is a gap between the top of the oil baffle and the bottom of the filter element.

[0024] With the above technical solution, since the spring needs a certain amount of compression, a gap is left between the top of the oil baffle and the bottom of the filter element in order to allow for this amount.

[0025] The beneficial effects of the fuel filter built into the drainage structure provided by this utility model are as follows:

[0026] I. The fuel filter provided by this utility model achieves rapid drainage of water accumulated inside the filter through a simple drainage structure consisting of a baffle, a sealing block, and a spring. Traditional filter drainage often requires complex operations or special tools, while this utility model only requires an external rod to lift the sealing block, causing it to avoid the water permeability holes, thus achieving drainage. This design greatly simplifies the drainage process; users do not need to disassemble the filter or use special equipment, but can complete the operation with common tools (such as tree branches, screwdrivers, etc.), significantly improving the convenience and practicality of maintenance.

[0027] Second, this utility model features an annular positioning protrusion at the bottom of the oil baffle cylinder, which, in conjunction with a spring-driven sealing block, effectively prevents oil leakage and ensures accurate repositioning of the sealing block during drainage, thus improving sealing reliability. The design of multiple circumferentially distributed permeable holes not only avoids the risk of single-hole blockage but also improves drainage efficiency and uniformity. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 A schematic diagram of the fuel filter built into the drainage structure provided by this utility model;

[0030] Figure 2 for Figure 1 A structural diagram from another angle;

[0031] Figure 3 A schematic diagram of the internal structure of the fuel filter built into the drainage structure provided by this utility model;

[0032] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0033] Figure 5 for Figure 3 A structural diagram from another angle.

[0034] In the diagram: 1. Outer shell; 2. Filter element; 3. Threaded plate; 4. Oil baffle; 5. Sealing block; 6. Spring; 7. Water permeable hole; 8. Positioning protrusion. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0036] The following is based on Figures 1 to 5 The contents of this utility model will be described.

[0037] This embodiment provides a fuel filter with a built-in drainage structure, including a housing 1, a filter element 2, a screw plate 3, an oil baffle 4, a sealing block 5, and a spring 6.

[0038] like Figure 1 and Figure 5 As shown, the outer casing 1 has an inlet at the top, a drain outlet at the bottom, and a receiving cavity in the middle, with both the inlet and the drain outlet connected to the receiving cavity.

[0039] like Figure 5 As shown, the screw sealing plate 3 is set at the inlet of the outer casing 1. The screw sealing plate 3 has an oil inlet and an oil outlet, both of which penetrate the screw sealing plate 3.

[0040] The filter element 2 is located inside the housing 1, within the accommodating cavity. The open end of the filter element 2 is connected to the oil outlet. The filter element 2 divides the accommodating cavity into a first separation cavity and a second separation cavity. The oil inlet on the screw plate 3 is connected to the first separation cavity. The space inside the filter element 2 is the second separation cavity and is connected to the oil outlet. The drain outlet is also connected to the first separation cavity.

[0041] like Figure 3 and Figure 5 As shown, the oil baffle 4 is located inside the first separation chamber and below the filter element 2. The oil baffle 4 is connected to the outer casing 1 and communicates with the drain port. The oil baffle 4 has a water permeable hole 7, which connects the first separation chamber and the interior of the oil baffle 4. Water can flow from the first separation chamber through the water permeable hole 7 into the interior of the oil baffle 4, and then flow through the drain port to the outside of the fuel filter.

[0042] like Figures 3 to 5 As shown, the sealing block 5 is located inside the oil baffle cylinder 4 and is used to block the drain outlet. The spring 6 is located inside the oil baffle cylinder 4, with one end of the spring 6 abutting against the sealing block 5 and the other end extending out of the oil baffle cylinder 4 and abutting against the filter element 2. The sealing block 5 blocks the drain outlet with the push of the spring 6 to prevent oil from flowing out of the drain outlet.

[0043] like Figures 3 to 5As shown, to improve the sealing performance of the sealing block 5 to the drain outlet, an annular positioning protrusion 8 is provided at the bottom end of the oil baffle cylinder 4. The inner diameter of the annular positioning protrusion 8 is smaller than the inner diameter of the oil baffle cylinder 4. Under the push of the spring 6, the sealing block 5 is pressed against the side of the positioning protrusion 8, thereby improving the sealing performance. To further improve the sealing effect, the material of the sealing block 5 is selected as rubber or silicone.

[0044] Because the sealing block 5 needs to move within the oil baffle cylinder 4 to avoid the water permeable hole 7, the first separation chamber can be connected to the drain outlet via the water permeable hole 7, thus completing the drainage of water from the fuel filter. The sealing block 5 needs to compress the spring 6 to avoid the water permeable hole 7; therefore, sufficient compression must be allowed for the spring 6. Thus, there is a certain gap between the top of the oil baffle cylinder 4 and the bottom of the filter element 2.

[0045] like Figure 3 and Figure 4 As shown, to improve the drainage efficiency of the fuel filter, multiple water inlets 7 are provided, and these multiple water inlets 7 are arranged in a circumferentially evenly distributed manner. The water inlets 7 are located close to the positioning protrusion 8, so as to drain as much water as possible from the first separation chamber.

[0046] The working principle of the fuel filter with built-in drainage structure provided by this utility model is as follows: When the oil to be filtered enters the fuel filter through the inlet, it first enters the first separation chamber. At this time, due to the sealing block 5 blocking the drain outlet, the oil to be filtered will remain in the first separation chamber. As external oil to be filtered is added, some of the oil to be filtered will pass through the filter element 2 and enter the second separation chamber, and flow out from the outlet. The water will be isolated in the first separation chamber by the filter element 2. After a period of filtration, a large amount of water will remain in the first separation chamber. This water needs to be drained in time, otherwise it will affect the filtration effect of the fuel filter. At this time, it is only necessary to use a tool (this tool is very common, as long as it is a rod-shaped object or an object with a rod-shaped part, even a tree branch) to lift the sealing block 5, so that the sealing block 5 avoids the water permeable hole 7, thereby completing the drainage of water inside the fuel filter.

[0047] It should be noted that since other structures of the fuel filter are not the focus of this application and belong to the prior art, they will not be described in detail, and those skilled in the art will fully understand.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fuel filter with a built-in drainage structure, characterized in that, include: The outer shell (1) has a receiving cavity, the top of the outer shell (1) has an inlet, and the bottom of the outer shell (1) has a drain outlet; A filter element (2) is disposed in the accommodating cavity, and the filter element (2) isolates the accommodating cavity into a first separation cavity and a second separation cavity; A screw sealing plate (3) is provided at the entrance of the outer shell (1). The screw sealing plate (3) has an oil inlet and an oil outlet. The oil inlet is connected to the first separation chamber, and the oil outlet is connected to the second separation chamber. An oil baffle (4) is located at the bottom of the accommodating cavity and connected to the drain outlet. The oil baffle (4) is located below the filter element (2) and has a water permeable hole (7). A sealing block (5) is placed inside the oil baffle (4) and used to block the drain outlet; A spring (6) is inserted inside the oil baffle cylinder (4). One end of the spring (6) abuts against the bottom of the filter element (2), and the other end abuts against the sealing block (5). When the sealing block (5) is pushed up by an external object and avoids the water-permeable hole (7), the water in the outer shell (1) flows through the water-permeable hole (7) and the drain outlet.

2. The fuel filter with a built-in drainage structure according to claim 1, characterized in that, The permeable holes (7) are multiple and have the same height.

3. A fuel filter with a built-in drainage structure according to claim 2, characterized in that, The multiple water-permeable holes (7) are arranged evenly in a circle with the axis of the oil-blocking cylinder (4) as the center.

4. A fuel filter with a built-in drainage structure according to claim 1, characterized in that, The bottom end of the oil baffle (4) has a positioning protrusion (8), and the sealing block (5) is pressed against the positioning protrusion (8) by means of the spring (6) to block the drain outlet.

5. A fuel filter with a built-in drainage structure according to claim 4, characterized in that, The positioning protrusion (8) is ring-shaped.

6. A fuel filter with a built-in drainage structure according to any one of claims 1-5, characterized in that, There is a gap between the top of the oil baffle (4) and the bottom of the filter element (2).

Images