Filter tank with high sealing performance

Abstract

The utility model discloses a filter tank with high sealing performance, which comprises a tank body, a threaded block is connected with the outer wall of the circumference of the top of the tank body in an integrally formed manner, a cross-shaped sealing ring is inserted into the top of the threaded block, a tank cover is sleeved on the outer wall of the circumference of the threaded block, an elastic ring is inserted into the top of the tank cover, and a friction ring is overlapped on the top of the elastic ring. An occlusion clamping edge is integrally formed and connected to the top of the tank cover, a dovetail groove is formed in the circumferential inner wall of the occlusion clamping edge, a second sealing ring is inserted into the dovetail groove, and a filter element is arranged in the tank body. A cross-shaped compensation sealing ring is integrated, dynamic compensation of axial pre-tightening force is achieved, meanwhile, a double-module dynamic sealing interface is formed by the friction ring and the elastic ring, a dovetail groove embedded structure is adopted for the top meshing clamping edge, a second sealing ring is embedded into a dovetail groove, and a double-sealing mechanism is formed through radial compression and axial pre-tightening.

Description

Technical Field

[0001] This utility model relates to the field of high-sealing filter canister technology, specifically a filter canister for a high-sealing oil filter. Background Technology

[0002] An oil filter, also known as an oil strainer, is used to remove impurities such as dust, metal particles, carbon deposits, and soot particles from engine oil, protecting the engine.

[0003] The prior art patent document CN222184882U provides a high-sealing oil filter, including a housing, a mesh cylinder disposed inside the housing, a filter paper cylinder sleeved on the outer wall of the mesh cylinder, a folded structure formed around the surface of the filter paper cylinder, an end cap disposed at the opening of the housing, an outlet structure formed in the middle of the end cap, the outlet structure extending at least partially into the mesh cylinder, a plurality of inlet holes disposed around the surface of the end cap, and a backflow prevention component disposed at the inlet holes; the backflow prevention component includes a first housing communicating with the inlet holes, a first spring disposed inside the first housing, a sealing plate disposed at the end of the first spring, and a plurality of holes formed on the outer wall of the first housing; this invention solves the problem that the check valve plate of the prior art filter is often an elastic rubber sheet, which is prone to aging after long-term use, resulting in a decrease in its deformation capacity and thus failing to effectively prevent backflow.

[0004] Although the device has many beneficial effects, it still has the following problems: the filter canister is made of one piece, the filter element needs to be completely disassembled for replacement, the filter element maintenance is time-consuming, and the single sealing ring structure has no redundant sealing design, resulting in a high oil leakage rate. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the issues of time-consuming filter element maintenance due to the one-piece molded filter canister structure and high oil leakage rate due to the single sealing ring structure, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a filter canister with high sealing performance. It adopts a threaded screw-on split structure to achieve quick opening and replacement of the filter element. It integrates a cross-shaped compensating sealing ring to achieve dynamic compensation of axial preload. At the same time, the bottom of the canister cover is injection molded with a positioning block. A third sealing ring is added to the inner wall of the block to enhance the axial positioning accuracy of the filter element flange. The friction ring and the elastic ring form a dual-module dynamic sealing interface. The top interlocking edge adopts a dovetail groove embedded structure. The second sealing ring is embedded inside the dovetail groove. Radial compression and axial preload form a double sealing mechanism.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A high-sealing filter canister includes a canister body. A threaded block is integrally formed on the outer circumference of the top of the canister body. A slot is formed on the top of the threaded block, and a cross-shaped sealing ring is inserted into the slot. The cross-shaped sealing ring enhances the sealing performance between the canister cap and the canister body while mitigating pressure damage at the connection point caused by excessive screwing. A canister cap is fitted onto the outer circumference of the threaded block. A fixing groove is formed on the top of the canister cap, and an elastic ring is inserted into the fixing groove. A friction ring is superimposed on top of the elastic ring. An interlocking edge is integrally formed on the top of the canister cap, and a dovetail groove is formed on the inner circumference of the interlocking edge. A second sealing ring is inserted into the dovetail groove. A filter element is disposed inside the canister body.

[0012] As a preferred embodiment of the high-sealing filter can of this utility model, the filter element includes a cylinder with multiple circular through holes on the outer circumference of the cylinder, filter paper sleeved on the outer circumference of the cylinder, the filter paper having a folded structure, a bypass valve provided at the bottom of the cylinder, and a pressure spring tightly attached to the bottom of the filter element.

[0013] As a preferred embodiment of the high-sealing filter can of this utility model, the top of the can cover is provided with multiple oil inlet holes, and the center of the top of the can cover is provided with an oil outlet hole.

[0014] As a preferred embodiment of the high-sealing filter can of this utility model, the can cover is integrally formed with a positioning block, and the inner circumference of the positioning block is tightly fitted with a third sealing ring. The third sealing ring enhances the sealing performance of the connection between the filter element and the can cover, and can also buffer the vibration impact of the filter can on the filter element. A check valve is provided at the oil inlet outlet.

[0015] As a preferred embodiment of the high-sealing filter tank of this utility model, the check valve includes a spring, the output end of the spring is welded with a check plate, the top of the check plate is in close contact with the oil inlet hole, and the outer circumferential wall of the check valve is provided with multiple oil inlets.

[0016] As a preferred embodiment of the high-sealing filter can of this utility model, the inner circumference of the bottom of the can cover is integrally formed with a thread that matches the outer circumference of the threaded block, and the bottom of the can cover is provided with an annular slot that matches the shape and size of the cross-shaped sealing ring.

[0017] As a preferred embodiment of the high-sealing filter can of this utility model, the outer circumference of the third sealing ring is tightly attached to the positioning block. The positioning block can not only center and limit the filter element, but also limit and fix the third sealing ring. The inner circumference of the third sealing ring is tightly attached to the oil inlet hole.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This type of high-sealing filter canister adopts a threaded screw-on split structure, which enables quick opening and replacement of the filter element. It integrates a cross-shaped compensating sealing ring to achieve dynamic compensation of axial preload.

[0021] This type of high-sealing filter canister features a positioning block injection-molded at the bottom of the canister cover. A third sealing ring is added to the inner wall of the block to enhance the axial positioning accuracy of the filter element flange. The friction ring and the elastic ring form a dual-module dynamic sealing interface. The top interlocking edge adopts a dovetail groove embedded structure, with a second sealing ring embedded inside the dovetail groove. Radial compression and axial pre-tightening form a double sealing mechanism. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a high-sealing filter can of this utility model;

[0024] Figure 2 This is an exploded view of the overall structure of a high-sealing filter can of this utility model;

[0025] Figure 3 This is an exploded view of the top structure of the lid of a filter canister with high sealing performance according to this utility model;

[0026] Figure 4 This is a cross-sectional view of the internal structure of the lid of a high-sealing filter can of this utility model;

[0027] Figure 5 This is a cross-sectional view of the internal structure of a high-sealing filter can of this utility model.

[0028] The following are the labels in the diagram: 100, tank body; 110, threaded block; 120, cross-shaped sealing ring; 200, tank cover; 201, oil outlet; 202, oil inlet; 210, fixing groove; 211, elastic ring; 212, friction ring; 220, dovetail groove; 221, second sealing ring; 230, positioning block; 231, third sealing ring; 240, check valve; 300, filter element. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides a schematic diagram of the overall structure of a high-sealing filter tank according to one embodiment, including:

[0035] Please see Figures 1-5This embodiment of a high-sealing filter canister includes a canister body 100. A threaded block 110 is integrally formed on the outer circumference of the top of the canister body 100. A slot is formed on the top of the threaded block 110, and a cross-shaped sealing ring 120 is inserted into the slot. The cross-shaped sealing ring 120 is a pre-compressed fluororubber ring with a cross-shaped cross-section, supporting multiple non-destructive disassembly and assembly. A canister cover 200 is fitted onto the outer circumference of the threaded block 110. A fixing groove 210 is formed on the top of the canister cover 200, and an elastic ring 211 is inserted into the fixing groove 210. The elastic ring 211 is made of perfluoroether rubber, facilitating elastic deformation. The top of the elastic ring 211 is fixedly adhered and superimposed using DSF-specific adhesive. The filter can has a friction ring 212 made of PTFE composite graphite material, which facilitates frictional fixation between the can cover 200 and the oil filter installation position. The top of the can cover 200 is integrally formed with a snap-fit ​​edge, which facilitates the snap-fit ​​fixation of the filter can. The inner wall of the snap-fit ​​edge is provided with a dovetail groove 220, and a second sealing ring 221 is inserted into the dovetail groove 220. The outer contact surface of the second sealing ring 221 is covered with a hydrogenated nitrile rubber ring with a PTFE wear-resistant layer. The second sealing ring 221, the elastic ring 211, and the friction ring 212 form a double sealing structure of radial compression and axial pre-tightening, which increases the sealing performance of the filter can and reduces the oil leakage rate. A filter element 300 is installed inside the can body 100.

[0036] It is worth noting that, in order for the filter element 300 to filter the engine oil, the filter element 300 specifically includes a cylinder with multiple circular through holes on the outer circumference of the cylinder. Filter paper is sleeved on the outer circumference of the cylinder. The filter paper has a folded structure to increase the contact area with the engine oil and facilitate the filtration of the engine oil. A bypass valve is set at the bottom of the cylinder, and a pressure spring is tightly attached to the bottom of the filter element 300.

[0037] Next, to facilitate the inlet and outlet of oil in the filter canister, the top of the canister cover 200 is provided with multiple oil inlet holes 202 to facilitate the entry of filtered oil, and the center of the top of the canister cover 200 is provided with an oil outlet hole 201 to facilitate the discharge of filtered oil.

[0038] Meanwhile, in order to seal and fix the filter element 300 and the canister cap 200, specifically, the canister cap 200 is integrally formed with a positioning block 230 to facilitate the centering and fixing of the filter element 300. The inner circumference of the positioning block 230 is provided with a third sealing ring 231, which is an O-ring made of FKM material, to prevent the filter element 300 from shifting due to uneven pressure, resulting in insufficient sealing between the filter element 300 and the filter canister. A check valve 240 is provided at the output end of the oil inlet 202.

[0039] Furthermore, to prevent oil backflow, specifically, the check valve 240 includes a spring to facilitate the reset of the check plate. The spring output end is welded with a check plate to prevent oil backflow. The top of the check plate is in close contact with the oil inlet hole 202, and the outer circumference of the check valve 240 has multiple oil inlets.

[0040] It is worth noting that, in order to facilitate the screw connection and fixation of the can body 100 and the can lid 200, specifically, the bottom circumferential inner wall of the can lid 200 is integrally formed with a thread that matches the circumferential outer wall of the threaded block 110. The bottom of the can lid 200 is provided with an annular slot that matches the shape and size of the cross-shaped sealing ring 120. The bottom and top of the cross-shaped sealing ring 120 are embedded in the can body 100 and the can lid 200 to prevent oil leakage through the threads, while realizing dynamic compensation of axial preload.

[0041] Finally, to facilitate the fixing of the third sealing ring 231, specifically, the outer circumference of the third sealing ring 231 is tightly attached to the positioning block 230, and the inner circumference of the third sealing ring 231 is tightly attached to the oil inlet hole 202, reducing the gap between the filter element 300 and the can cover 200 and enhancing the connection and sealing performance between the filter element 300 and the can cover 200.

[0042] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0043] Combination Figures 1-5 The high-sealing filter can of this embodiment is used in the following specific process:

[0044] 1. When the user installs the filter canister, the friction ring 212 on the surface of the canister cover 200 will be in close contact with the contact surface. The elastic ring 211 will undergo elastic deformation due to compression, pushing the friction ring 212 on the top, reducing the gap between the filter canister and the mounting surface. The interlocking edge on the top of the canister cover 200 will help fix the filter canister. The second sealing ring 221 embedded in the inner circumference of the interlocking edge will fill the gap between the interlocking edge and the side wall contact surface of the installation position, increasing the installation sealing of the filter canister and reducing the oil leakage rate.

[0045] 2: When the filter canister is in use, the positioning block 230 inside the canister cover 200 will center and limit the filter element 300 to prevent the filter element 300 from shifting position. The third sealing ring 231 enhances the sealing between the filter element 300 and the canister cover 200 to prevent the filter element 300 from shifting position due to uneven pressure, causing the filter oil to leak into the filter element 300 through the shift gap.

[0046] 3. When the filter canister needs to be disassembled for maintenance, because the canister cover 200 and the canister body 100 are fixed by a threaded connection, the canister cover 200 can be quickly opened by rotating it, which facilitates the replacement of the filter element 300 and improves maintenance efficiency. After maintenance, rotate and fix the canister cover 200. The top and bottom of the cross-shaped sealing ring 120 are embedded in the canister cover 200 and the canister body 100 to fill the gap between the canister cover 200 and the canister body 100. This prevents oil leakage and achieves dynamic compensation of the axial preload between the canister cover 200 and the canister body 100, thereby enhancing the sealing performance of the filter canister.

[0047] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A filter can with high sealing property, characterized by, The utility model provides a filter oil tank, including the jar body (100), the jar body (100) top circumferential outer wall is integrally formed connection has the threaded block (110), the threaded block (110) top is provided with the slot, the slot inside is inserted with cross type sealing ring (120), the threaded block (110) circumferential outer wall is sleeved with the jar cover (200), the jar cover (200) top is provided with the fixed groove (210), the fixed groove (210) inside is inserted with the elastic ring (211), the elastic ring (211) top is overlapped with the friction ring (212), the jar cover (200) top integrally formed connection has the occlusion card edge, the occlusion card edge circumferential inner wall is provided with swallow tail groove (220), the swallow tail groove (220) inside is inserted with second sealing ring (221), the jar body (100) inside is provided with filter core (300).

2. The high-seal integrity can as defined in claim 1, wherein The filter core (300) includes a cylinder, a plurality of circular through holes are formed in the circumferential outer wall of the cylinder, a filter paper is sleeved on the circumferential outer wall of the cylinder, the filter paper has a folded structure, a bypass valve is arranged at the bottom of the cylinder, and a pressure spring is attached to the bottom of the filter core (300).

3. The high-seal integrity can as defined in claim 1, wherein A plurality of oil inlet holes (202) are formed in the top of the jar cover (200), and an oil outlet hole (201) is formed in the center of the top of the jar cover (200).

4. The high-seal integrity can according to claim 3, wherein, The jar cover (200) is integrally connected with a positioning clamping block (230) inside, the positioning clamping block (230) is provided with a third sealing ring (231) on the circumferential inner wall, and the oil inlet hole (202) is provided with a check valve (240) at the output end.

5. The high-seal integrity can according to claim 4, wherein, The check valve (240) includes a spring, the output end of the spring is welded with a check plate, the check plate is attached to the oil inlet hole (202) at the top, and a plurality of oil inlet openings are formed in the circumferential outer wall of the check valve (240).

6. The high-seal integrity can as defined in claim 3, wherein The jar cover (200) is integrally connected with a screw thread on the circumferential inner wall at the bottom, which is matched with the circumferential outer wall of the threaded block (110), and the jar cover (200) is provided with an annular slot at the bottom, which is matched with the cross type sealing ring (120) in shape and size.

7. The high-seal integrity can according to claim 4, wherein, The third sealing ring (231) is attached to the positioning clamping block (230) on the circumferential outer wall, and the third sealing ring (231) is attached to the oil inlet hole (202) on the circumferential inner wall.

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