Methanol filter

Abstract

The methanol filter comprises a cylindrical shell and a filter element, an upper end cover of the filter element is upwards connected with a connecting port communicated with a liquid outlet cavity, and the connecting port upwards protrudes out of the upper end cover of the filter element; the filter element upper end cover is upwards connected with a sealing flow guide part, and the sealing flow guide part comprises an inner ring and an outer ring which are concentric, and a plurality of connecting plates between the inner ring and the outer ring; the inner ring protrudes downwards to be integrally provided with a connecting cylinder, the connecting opening is upwards inserted into the connecting cylinder, and the upper surface of the inner ring is sunken downwards to be provided with an outlet inserting groove; an annular liquid outlet sealing groove is formed in the circumferential outer wall of the connecting opening, and a liquid outlet annular sealing ring is embedded in the liquid outlet sealing groove; the upper surface of an outer ring of the sealing flow guide piece is downwards concaved to form an annular flanging crimping groove, and the top flanging of the cylindrical shell is crimped in the flanging crimping groove; an annular liquid inlet sealing groove is formed in the circumferential outer side wall of an outer ring of the sealing flow guide part in a radial sunken mode, and a liquid inlet annular sealing ring is embedded in the liquid inlet sealing groove. According to the utility model, the pressure-resistant performance of sealing among the sealing flow guide piece, the cylindrical shell and the filter element is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive filters, and particularly relates to a methanol filter. Background Art

[0002] A methanol filter is a device used to filter and purify methanol fuel for motor vehicles. As Figure 1 shown, the methanol filter before improvement includes a cylindrical shell 1 with an open upper end and a closed lower end. A filter element is arranged inside the cylindrical shell 1. The filter element includes a cylindrical filter layer 2 and a filter element upper end cap 3 and a filter element lower end cap 4 arranged at both ends of the cylindrical filter layer 2. An annular liquid inlet cavity 5 is formed between the filter element and the inner side wall of the cylindrical shell 1. The cylindrical filter layer 2 has a central hole, and the central hole serves as a liquid outlet cavity;

[0003] A connection port 6 communicating with the liquid outlet cavity is arranged in the middle of the filter element upper end cap 3. The filter element upper end cap 3 is upwardly connected with a sealing and guiding member 7. The outer circumferential wall of the sealing and guiding member 7 is hermetically connected with the inner wall of the top end of the cylindrical shell 1. A central interface 8 hermetically connected with the connection port 6 of the filter element upper end cap 3 is arranged in the middle of the sealing and guiding member 7. An air vent 9 communicating with the liquid inlet cavity 5 is arranged on the sealing and guiding member 7.

[0004] During operation, methanol enters the annular liquid inlet cavity 5 through the air vent 9 of the sealing and guiding member 7, passes through the cylindrical filter layer 2 along the direction and then enters the liquid outlet cavity, and then flows out of the methanol filter upward through the connection port 6 and the central interface 8 to provide clean methanol for the engine.

[0005] The methanol filter before improvement has the following disadvantages:

[0006] 1. The outer circumferential wall of the sealing and guiding member 7 and the inner wall of the top end of the cylindrical shell 1, as well as between the central interface 8 and the connection port 6, maintain the sealing state of the connection part through welding or threaded connection or canning connection. The welding process may cause deformation of the cylinder body, resulting in stress concentration at the welding part and reducing the pressure resistance of the sealing part. Canning connection refers to sealing through bonding or sealant, etc., and the pressure resistance is limited by the performance of the bonding agent or sealant. Threaded connection has the characteristics of simple structure and convenient disassembly and assembly, but has high requirements for the accuracy and consistency of the thread teeth. Insufficient thread accuracy or improper fit is likely to lead to low sealing pressure resistance. The disassembly and assembly actions during maintenance or replacement of the filter element are likely to reduce the pressure resistance of the sealing structure. After the sealing pressure resistance performance decreases, it will increase the abnormal wear of the engine fuel injection system and the cylinder, cause the engine power to decline, fuel consumption to increase, and reduce the service life of the engine.

[0007] 2. The lower end cover 4 of the filter element is press-fitted with the bottom wall of the cylindrical shell 1 through a spring. The contact area between the spring and the bottom wall of the cylindrical shell 1 is small and limited to the circumferential line of the spring, and the problem of uneven force on the spring may occur, resulting in damage to the sealing structure at the sealed connection between the sealing and guiding member 7 and the upstream component (the upstream component that methanol passes through before entering the methanol filter) due to uneven force. Summary of the Invention

[0008] The purpose of the present invention is to provide a methanol filter, which improves the pressure-resistant performance of the seal between the sealing and guiding member, the cylindrical shell and the filter element through an improved sealing connection structure such as flanging and press-fitting.

[0009] To achieve the above purpose, the methanol filter of the present invention includes a cylindrical shell with an open upper end and a closed bottom end. A filter element is provided inside the cylindrical shell. The filter element includes a cylindrical filter layer and a filter element upper end cover and a filter element lower end cover provided at both ends of the cylindrical filter layer. An annular liquid inlet cavity is formed between the filter element and the inner side wall of the cylindrical shell. The cylindrical filter layer has a central hole, and the central hole serves as a liquid outlet cavity;

[0010] The upper end cover of the filter element is upwardly connected with a connection port communicating with the liquid outlet cavity, and the connection port protrudes upward from the upper end cover of the filter element; the upper end cover of the filter element is upwardly connected with a sealing and guiding member,

[0011] The sealing and guiding member includes a concentric inner ring and outer ring. The inner ring and the outer ring are connected by a plurality of radially arranged connecting plates, and the connecting plates are evenly arranged in the circumferential direction; an inlet port communicating with the liquid inlet cavity is formed between adjacent connecting plates and between the inner ring and the outer ring. The inner ring is integrally convex downward to form a connecting cylinder, and the connection port is adapted to the connecting cylinder. The connection port is upwardly inserted into the connecting cylinder. The upper surface of the inner ring is recessed downward to form an outlet insertion groove, and the outlet insertion groove is used to insert an external interface member and serve as the liquid outlet of the methanol filter;

[0012] An annular liquid outlet sealing groove is provided on the outer circumferential wall of the connection port, and an annular liquid outlet sealing ring is embedded in the liquid outlet sealing groove. The annular liquid outlet sealing ring forms a tight press seal between the connecting cylinder and the connection port;

[0013] The upper surface of the outer ring of the sealing and guiding member is recessed downward to form an annular flanging and press-fitting groove, and the top flange of the cylindrical shell is press-fitted into the flanging and press-fitting groove;

[0014] An annular liquid inlet sealing groove is radially recessed on the circumferential outer side wall of the outer ring of the sealing and guiding member, and an annular liquid inlet sealing ring is embedded in the liquid inlet sealing groove. The annular liquid inlet sealing ring forms a tight press seal between the circumferential outer side wall of the outer ring and the inner side wall of the cylindrical shell.

[0015] The upper surface of the outer ring has a circular raised portion protruding upward at a position within the flanging crimping groove. The upper surface of the circular raised portion is recessed downward to form an end-face circular sealing groove, and an end-face circular sealing ring is embedded in the end-face circular sealing groove. The end-face circular sealing ring is used to be crimped with an upstream component before methanol enters the methanol filter and form a crimping seal; at the center of the lower surface of the lower end cover of the filter element, there is a recessed groove, and an embedded ring is embedded in the recessed groove. The outer diameter of the embedded ring matches the diameter of the recessed groove; the embedded ring extends downward out of the recessed groove and is integrally connected with a pressing ring. The outer diameter of the pressing ring is larger than the diameter of the recessed groove. The pressing ring presses the lower end cover of the filter element upward. The pressing ring is integrally connected with a plurality of elastic reed pieces downward. Each elastic reed piece encloses a rectangle or a circle. Each elastic reed piece extends radially outward from top to bottom. The lower ends of each elastic reed piece are pressed against the bottom wall of the cylindrical shell.

[0016] The utility model has the following advantages:

[0017] Guided by the design of improving the sealing effect and the long-term pressure resistance effect, the structure of the sealing and flow guiding member and the sealing connection structure between the sealing and flow guiding member, the cylindrical shell and the upper end cover of the filter element are redesigned.

[0018] The liquid outlet part of the sealing and flow guiding member forms a good and long-lasting tight pressure seal through the liquid outlet circular sealing ring, and the liquid inlet part of the sealing and flow guiding member forms a good and long-lasting tight pressure seal through the liquid inlet circular sealing ring. Compared with the existing sealing connection structures such as welding, screwing, and canning connection between the sealing and flow guiding member and the cylindrical shell, the sealing effect and the long-term pressure resistance effect are improved.

[0019] The connection port protrudes upward and extends into the connection cylinder, greatly increasing the matching area between the liquid outlet part of the upper end cover of the filter element and the sealing and flow guiding member, and correspondingly improving the sealing performance.

[0020] The diameter of the recessed groove in the utility model is the same as that of the spring recessed groove in the prior art. Since each elastic reed piece extends radially outward from top to bottom, the area enclosed by the contact parts of each elastic reed piece and the bottom wall of the cylindrical shell is much larger than before, and the force stability is better. When the vehicle is driving on a bumpy road section, the overall force stability of each elastic reed piece is better than that of the spring in the prior art, so that the lower end cover of the filter element receives a more stable and more axially consistent pressing force than before. This pressure is transmitted to the end-face circular sealing ring, making the end-face circular sealing ring receive a more stable and more axially consistent pressing force than before, reducing the probability of seal failure at the end-face circular sealing ring and improving the sealing stability at the end-face circular sealing ring.

[0021] The insert ring can serve as an assembly guide, enabling the elastic reed and the pressing ring to be assembled with the lower end cover of the filter element more conveniently and accurately. After assembly, the insert ring also enhances the assembly stability between the elastic reed, the pressing ring and the lower end cover of the filter element. On bumpy roads, the pressing ring can apply a uniform axial force to the lower end cover of the filter element. Even if the forces on the elastic reeds are inconsistent on bumpy roads, the pressing ring can buffer this inconsistent force, so that the lower end cover of the filter element is always subjected to an axial force, avoiding obvious deviation of the filter element from the axial direction and ensuring continuous good sealing at the end face annular sealing ring. Brief Description of the Drawings

[0022] Figure 1 is a schematic half-sectional structure view of the methanol filter before improvement.

[0023] Figure 2 is a schematic sectional structure view of the methanol filter of the present utility model.

[0024] Figure 3 is Figure 2 top view of

[0025] Figure 4 is a schematic three-dimensional structure view of the methanol filter of the present utility model.

[0026] Figure 5 is a schematic three-dimensional structure view of the sealing and guiding member, Figure 5 with the view from above.

[0027] Figure 6 is a schematic three-dimensional structure view of the sealing and guiding member from another angle, Figure 6 with the view from below.

[0028] Figure 7 is a schematic three-dimensional structure view of the integrally provided insert ring, pressing ring and elastic reed. Detailed Embodiment

[0029] Since the structure after improvement is different from that before improvement, for the sake of distinction, different reference numerals are given to the components with the same name before and after improvement. For example, the reference numeral of the sealing and guiding member before improvement is 7, and the reference numeral of the sealing and guiding member after improvement is 17 for distinction. Although the cylindrical shell has a simple structure, it is still different before and after improvement. For example, the fitting part between the cylindrical shell and the sealing and guiding member is radially expanded to some extent after improvement. In short, for the components with the same name before and after improvement, different reference numerals are given to represent the differences before and after improvement.

[0030] Such as Figures 2 to 7As shown in the figure, the methanol filter of the present utility model includes a cylindrical shell 10 with an open upper end and a closed lower end. A filter element is provided inside the cylindrical shell 10. The filter element includes a cylindrical filter layer 11 and a filter element upper end cover 12 and a filter element lower end cover 13 provided at both ends of the cylindrical filter layer 11. An annular liquid inlet cavity 14 is formed between the filter element and the inner side wall of the cylindrical shell 10. The cylindrical filter layer 11 has a central hole, and the central hole serves as a liquid outlet cavity 15;

[0031] The filter element upper end cover 12 is upwardly connected with a connection port 16 communicating with the liquid outlet cavity 15, and the connection port 16 protrudes upward from the filter element upper end cover 12; the filter element upper end cover 12 is upwardly connected with a sealing and guiding member 17,

[0032] The sealing and guiding member 17 includes a concentric inner ring 18 and an outer ring 19. The inner ring 18 and the outer ring 19 are connected by a plurality of radially arranged connecting plates 20, and the connecting plates 20 are uniformly arranged in the circumferential direction; a liquid inlet 21 communicating with the liquid inlet cavity 14 is formed between adjacent connecting plates 20 and between the inner ring 18 and the outer ring 19. The inner ring 18 is integrally provided with a downward protruding connecting cylinder 22. The connection port 16 is adapted to the connecting cylinder 22, and the connection port 16 is upwardly inserted into the connecting cylinder 22. The upper surface of the inner ring 18 is downwardly recessed to form an outlet insertion groove 23, and the outlet insertion groove 23 is used to insert an external interface member and serves as the liquid outlet of the methanol filter;

[0033] An annular liquid outlet sealing groove is provided on the outer circumferential wall of the connection port 16, and a liquid outlet annular sealing ring 24 is embedded in the liquid outlet sealing groove. The liquid outlet annular sealing ring 24 forms a tight pressure seal between the connecting cylinder 22 and the connection port 16;

[0034] The upper surface of the outer ring 19 of the sealing and guiding member 17 is downwardly recessed to form an annular flanging pressing groove 25, and the top flanging of the cylindrical shell 10 is press-fitted into the flanging pressing groove 25, so that the inner wall of the cylindrical shell 10 tightly presses the liquid inlet annular sealing ring 26;

[0035] An annular liquid inlet sealing groove is radially recessed on the circumferential outer side wall of the outer ring 19 of the sealing and guiding member 17, and a liquid inlet annular sealing ring 26 is embedded in the liquid inlet sealing groove. The liquid inlet annular sealing ring 26 forms a tight pressure seal between the circumferential outer side wall of the outer ring 19 and the inner side wall of the cylindrical shell 10.

[0036] The present utility model is designed to improve the sealing effect and the long-term pressure resistance effect, and has redesigned the structure of the sealing and guiding member 17 and the sealing connection structure between the sealing and guiding member 17 and the cylindrical shell 10 and the filter element upper end cover 12.

[0037] The liquid outlet part of the sealing and guiding member 17 forms a good and durable tight pressing seal through the liquid outlet annular sealing ring 24, and the liquid inlet part of the sealing and guiding member 17 forms a good and durable tight pressing seal through the liquid inlet annular sealing ring 26, improving the sealing effect and the durable pressure resistance effect compared with the prior art in which the sealing and guiding member 17 and the cylindrical shell 10 adopt sealing connection structures such as welding, screwing, and canning connection.

[0038] The connection port 16 protrudes upward and extends into the connection cylinder 22, greatly increasing the matching area between the liquid outlet part of the upper end cover 12 of the filter element and the sealing and guiding member 17, and correspondingly improving the sealing performance.

[0039] The upper surface of the outer ring 19 and the position within the flanging crimping groove 25 protrude upward to form an annular protrusion 27. The upper surface of the annular protrusion 27 is recessed downward to form an end face annular sealing groove, and an end face annular sealing ring 28 is embedded in the end face annular sealing groove. The end face annular sealing ring 28 is used to be crimped with the upstream component before methanol enters the methanol filter (usually the interface component connected to the outlet pipeline of the methanol pump) to form a crimping seal; a groove 29 is recessed upward at the center of the lower surface of the lower end cover 13 of the filter element, and an embedded ring 30 is embedded in the groove 29. The outer diameter of the embedded ring 30 matches the diameter of the groove 29; the embedded ring 30 extends downward out of the groove 29 and is integrally connected with a pressing ring 31. The outer diameter of the pressing ring 31 is larger than the diameter of the groove 29. The pressing ring 31 presses the lower end cover 13 of the filter element upward. The pressing ring 31 is integrally connected with a plurality of elastic spring pieces 32 downward. Each elastic spring piece 32 encloses a rectangle or a circle. Each elastic spring piece 32 extends radially outward from top to bottom, and the lower ends of each elastic spring piece 32 are pressed against the bottom wall of the cylindrical shell 10.

[0040] The groove 29 in the present utility model has the same diameter as the spring groove 29 in the prior art. Since each elastic spring piece 32 extends radially outward from top to bottom, the area surrounded by the contact parts of each elastic spring piece 32 and the bottom wall of the cylindrical shell 10 is much larger than before, and the force stability is better. When the vehicle is driving on a bumpy road section, the overall force stability of each elastic spring piece 32 is better than that of the spring in the prior art, so that the lower end cover 13 of the filter element receives a more stable and more axial-directional top pressure than before. This pressure is transmitted to the end face annular sealing ring 28, making the end face annular sealing ring 28 receive a more stable and more axial-directional top pressure than before, reducing the probability of seal failure at the end face annular sealing ring 28 and improving the sealing stability at the end face annular sealing ring 28.

[0041] The insert ring 30 can serve as an assembly guide, enabling the elastic reed 32 and the pressing ring 31 to be assembled with the lower end cover 13 of the filter element more conveniently and accurately. After assembly, the insert ring 30 also enhances the assembly stability between the elastic reed 32 and the pressing ring 31 and the lower end cover 13 of the filter element. On bumpy roads, the pressing ring 31 can apply a uniform axial force to the lower end cover 13 of the filter element. Even if the forces on the elastic reeds 32 are inconsistent on bumpy roads, the pressing ring 31 can buffer this inconsistent force, so that the lower end cover 13 of the filter element always receives an axial force, preventing the force on the filter element from deviating significantly from the axial direction and ensuring that the end face annular sealing ring 28 maintains a good seal continuously.

[0042] The structure of the present utility model is simple and is convenient for manufacturing and assembly. During use, the present utility model is usually installed downstream of the methanol pump. The sealing and guiding member 17 is connected to an external interface member. The middle part of the interface member is inserted downward into the outlet insertion groove 23 for leading out the purified methanol; the interface member has a tightly pressing and fitting portion matching the inlet liquid annular sealing ring 26 for introducing methanol into the liquid inlet 21 and the liquid inlet cavity 14. Methanol enters the interface member from the upstream methanol pump and its outlet pipeline, then enters the annular liquid inlet cavity 14 through each liquid inlet 21, and then passes through the cylindrical filter layer 11 in the radial direction to be filtered and enters the liquid outlet cavity 15. The purified methanol passes upward through the liquid outlet (outlet insertion groove 23) and the interface member and flows to the downstream methanol injection system.

[0043] During the above use process, the upper surface of the outer ring 19 of the sealing and guiding member 17 is pressed against the outlet pipeline of the methanol pump through the end face annular sealing ring 28. Under the top pressure of each elastic reed 32, the end face annular sealing ring 28 is pressed to form a tightly pressing seal between the sealing and guiding member 17 and the interface member to prevent methanol leakage.

[0044] The above embodiments are only used to illustrate rather than limit the technical solutions of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the present utility model. Any modification or partial replacement without departing from the spirit and scope of the present utility model should be covered by the scope of the claims of the present utility model.

Claims

1. Methanol filter, comprising a cylindrical shell with an open upper end and a closed lower end. A filter element is provided inside the cylindrical shell. The filter element includes a cylindrical filter layer and a filter element upper end cover and a filter element lower end cover arranged at both ends of the cylindrical filter layer. An annular liquid inlet cavity is formed between the filter element and the inner side wall of the cylindrical shell. The cylindrical filter layer has a central hole, and the central hole serves as a liquid outlet cavity; It is characterized in that: The filter element upper end cover is connected upward with a connection port communicating with the liquid outlet cavity, and the connection port protrudes upward from the filter element upper end cover; the filter element upper end cover is connected upward with a sealing and guiding member, The sealing and guiding member includes a concentric inner ring and outer ring. The inner ring and the outer ring are connected by a plurality of radially arranged connecting plates, and the connecting plates are evenly arranged in the circumferential direction; an inlet port communicating with the liquid inlet cavity is formed between adjacent connecting plates and between the inner ring and the outer ring. The inner ring protrudes downward integrally with a connecting cylinder, and the connection port is adapted to the connecting cylinder. The connection port is inserted upward into the connecting cylinder. The upper surface of the inner ring is recessed downward with an outlet insertion groove for inserting an external interface member and serving as the liquid outlet of the methanol filter; An annular liquid outlet sealing groove is provided on the outer circumferential wall of the connection port, and an annular liquid outlet sealing ring is embedded in the liquid outlet sealing groove. The annular liquid outlet sealing ring forms a tight pressure seal between the connecting cylinder and the connection port; The upper surface of the outer ring of the sealing and guiding member is recessed downward with an annular flanging and pressing groove, and the top flanging of the cylindrical shell is press-fitted in the flanging and pressing groove; An annular liquid inlet sealing groove is radially recessed on the circumferential outer side wall of the outer ring of the sealing and guiding member, and an annular liquid inlet sealing ring is embedded in the liquid inlet sealing groove. The annular liquid inlet sealing ring forms a tight pressure seal between the circumferential outer side wall of the outer ring and the inner side wall of the cylindrical shell.

2. The methanol filter according to claim 1, wherein: An annular protrusion is provided on the upper surface of the outer ring at a position within the flanging and pressing groove, and an end face annular sealing groove is recessed downward on the upper surface of the annular protrusion. An end face annular sealing ring is embedded in the end face annular sealing groove for pressing against and forming a press-fit seal with the upstream component before methanol enters the methanol filter; a recess is provided upward at the center of the lower surface of the filter element lower end cover, and an embedded ring is embedded in the recess. The outer diameter of the embedded ring matches the diameter of the recess; the embedded ring extends downward out of the recess and is integrally connected with a pressing ring. The outer diameter of the pressing ring is larger than the diameter of the recess. The pressing ring presses upward against the filter element lower end cover. The pressing ring is integrally connected downward with a plurality of elastic spring pieces. Each elastic spring piece encloses a rectangle or a circle, and each elastic spring piece extends radially outward from top to bottom. The lower ends of each elastic spring piece are pressed against the bottom wall of the cylindrical shell.

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