Filter element with bypass valve and filter

Abstract

The filter element comprises an annular filter medium, a first end cover, a second end cover and the bypass valve, the first end cover and the second end cover are connected to the two ends of the annular filter medium, the annular filter medium is provided with a central cavity arranged around the central axis of the annular filter medium, the first end cover is eccentrically provided with an opening, and the second end cover is eccentrically provided with a second opening. The bypass valve is arranged at the opening and comprises a valve body with a hole, a valve element used for sealing the hole and an elastic piece used for pressing the valve element to approach the hole, and the hole is communicated with the central cavity; the valve body and the first end cover are welded in a hot melting mode or integrally formed in an injection molding mode. According to the technical scheme, the valve body of the bypass valve and the first end cover are integrated together in a hot melting welding or integral injection molding mode, the situation that the bypass valve with the higher cost is adopted to be assembled with the first end cover in a replaceable mode is avoided, the production cost of the filter element is reduced, the connection mode is firmer, and the risk that the valve body is loosened is eradicated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter technical field, especially, relate to a filter element and filter with bypass valve. BACKGROUND

[0002] Bypass valve is an important component in filter, its function is when engine cold start or filter is blocked but not in time to replace, under negative pressure, open bypass valve, let oil or fuel directly through filter.

[0003] The bypass valve is arranged in the support plate and is located at the eccentric position of the longitudinal axis of the filter element at present, so as to obtain the passage between the chamber of liquid to be filtered and the chamber of filtered liquid. This structure can realize the assembly between the bypass valve and the support plate and the quick maintenance replacement, but the assembly form of the two determines that the bypass valve is made of wear-resistant metal material, thereby increasing the cost of the filter cartridge. In addition, the metal part is embedded in the plastic support plate, and the valve body has the risk of loosening due to thermal expansion and cold contraction in work. SUMMARY

[0004] The main purpose of the utility model is to provide a filter element and filter with bypass valve, which aims to solve the technical problems of cost increase and easy falling off of the metal bypass valve in the support plate with bypass valve.

[0005] To achieve the above purpose, the filter element with bypass valve provided by the utility model comprises:

[0006] A ring-shaped filter medium, the ring-shaped filter medium has a central cavity arranged around a central axis thereof;

[0007] A first end cover and a second end cover connected to two ends of the ring-shaped filter medium, the first end cover is eccentrically provided with an opening; and

[0008] A bypass valve arranged in the opening, the bypass valve comprises a valve body with a hole, a valve core for closing the hole, and an elastic member for pressing the valve core close to the hole, and the hole communicates with the central cavity;

[0009] The valve body and the first end cover are heat fusion welded or integrally injection molded.

[0010] Optionally, the hole is circular, and the valve core is a spherical body.

[0011] Optionally, an annular raised wall is arranged on the end face of the first end cover, and the annular raised wall forms the opening.

[0012] Optionally, a clamping portion is arranged on the annular raised wall, and the elastic member is connected to the clamping portion.

[0013] Optionally, the valve body has a passage communicating the hole and the central cavity.

[0014] Optionally, the elastic member has a plurality of elastic pieces, which are in contact with the valve core.

[0015] Optionally, the plurality of elastic pieces are evenly distributed along the circumference of the hole.

[0016] Optionally, the elastic member is made of metal.

[0017] Optionally, further comprising a skeleton arranged in the central cavity, for supporting the annular filter medium.

[0018] Optionally, further comprising a support sleeved on the periphery of the annular filter medium, and a water-blocking net inlaid on the support.

[0019] The utility model also provides a filter, which comprises a shell and the filter core described above arranged in the shell; the shell has a fuel inlet and a fuel outlet communicating with the central cavity.

[0020] In the technical scheme of the utility model, the valve body and the first end cover of the bypass valve are integrated by hot melting welding or one-piece injection molding, which avoids the use of a more expensive bypass valve to replaceably assemble with the first end cover, reduces the production cost of the filter core, and the connection is more firm, which eliminates the risk of valve body loosening. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0022] Figure 1 is a structure schematic view of one embodiment of the filter core with a bypass valve provided by the utility model;

[0023] Figure 2 is Figure 1 a top view of the bypass valve;

[0024] Figure 3 is Figure 2 a sectional view of the A-A section in the bypass valve.

[0025] Label explanation: filter core with bypass valve-100, annular filter medium-1, central cavity-1a, first end cover-2, opening-2a, through hole-2b, annular convex wall-21, clamping part-211, second end cover-3, bypass valve-4, valve body-41, hole-41a, channel-41b, valve core-42, elastic member-43, spring piece-431, framework-5, support-6, water blocking net-7.

[0026] The realization, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In order to better describe and illustrate the embodiments of the present application, one or more drawings can be referred to, but additional details or examples used to describe the drawings should not be considered as limiting the scope of the utility model creation, the presently described embodiments or any one of the preferred modes of the present application.

[0029] In the description of the utility model, it should be pointed out that the directions or position relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like are based on the position relationship shown in the drawings, and are only for the convenience of describing the utility model, and therefore cannot be understood as limiting the utility model.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0031] Although the bypass valve of metal material realizes rapid repair and replacement, the cost of the filter core is also increased; and the metal part is embedded in the plastic support plate, and the valve body has the risk of loosening due to thermal expansion and cold contraction in work.

[0032] In view of this, the utility model provides a filter core with bypass valve, Figures 1-3 For the structure schematic view of the filter core with bypass valve provided by the utility model, please refer to Figures 1-3The filter element 100 comprises a ring-shaped filter medium 1, a first end cover 2 and a second end cover 3 connected to both ends of the ring-shaped filter medium 1, and a bypass valve 4.

[0033] Specifically, the ring-shaped filter medium 1 is in a straight cylinder shape, has a central cavity 1a arranged around a central axis thereof, and has an opening 2a eccentrically arranged on the first end cover 2, and the bypass valve 4 is fixedly arranged at the opening 2a. The bypass valve 4 comprises a valve body 41 having a hole 41a, a valve core 42, and an elastic member 43. The valve body 41 is in a columnar shape, the hole 41a is located at a central position of the valve body 41, and the elastic member 43 has elastic potential energy and can press the valve core 42 to be close to the hole 41a so that the hole 41a can be temporarily closed. The hole 41a is in communication with the central cavity 1a and the outside of the filter element, and the passage thereof is controlled by the valve core 42. When a negative pressure is generated in the filter element due to pumping and the pressure of the air acting on the valve core 42 is greater than the elastic force of the elastic member 43 acting on the valve core 42, the closure of the hole 41a is released. It should be noted that the valve body 41 and the first end cover 2 are made of plastic material and are integrally injection molded by heating the contact surfaces of the two plastic parts to be welded together to form a stable connection.

[0034] In the technical scheme of the utility model, the valve body 41 of the bypass valve 4 and the first end cover 2 are integrated by heat welding or integrally injection molding, so that the bypass valve 4 and the first end cover 2 are replaceably assembled without using a more expensive bypass valve 4, thereby reducing the production cost of the filter element 100. Moreover, the connection is more firm and the risk of loosening of the valve body 41 is eliminated.

[0035] To facilitate the closing of the hole 41a by the valve core 42, please refer to Figure 3 In an embodiment of the utility model, the hole 41a is circular and the valve core 42 is spherical, and the two can be tightly fitted.

[0036] To facilitate the installation of the bypass valve 4, please refer to Figure 1 and 3 In an embodiment of the utility model, the end surface of the first end cover 2 protrudes outward to form a certain height annular protruding wall 21, and the opening 2a is formed at the center of the annular protruding wall 21.

[0037] To facilitate the installation of the elastic member 43, please refer to Figure 1 and 3In an embodiment of the present application, the annular protruding wall 21 is provided with a clamping portion 211, which is a ring of annular protrusions on the inner wall of the annular protruding wall 21. The clamping portion 211 is provided with a clamping leg on the upper end of the elastic member 43 and a spring piece on the lower end of the elastic member 43. The elastic member 43 is installed in the valve body 41, thereby reducing the volume of the valve body 41 and facilitating the integration of the bypass valve 4 in the first end cover 2. In addition, the elastic member 43 has a ring-shaped body, which is arranged on the end face of the valve body 41 (i.e., below the clamping portion 211) and supports the elastic member 43 to prevent it from falling off.

[0038] Referring to Figure 3 , the elastic member 43 is assembled into the first end cover 2 in the direction of the arrow (from bottom to top as shown in the figure), which can prevent the elastic member 43 from being deformed during assembly (the outer diameter of the upper clamping leg of the spring member 43 is greater than the hole diameter of the opening 2a, and the clamping leg is prone to deformation when assembled from top to bottom, which may cause unstable opening pressure).

[0039] Since the bypass valve 4 is eccentrically arranged, the hole 41a is not directly opposite the central cavity 1a. In order to facilitate the oil entering the hole 41a from the central cavity 1a, please refer to Figure 3 In an embodiment of the present application, the valve body 41 has a passage 41b that connects the hole 41a and the central cavity 1a, so as to guide the oil into the hole 41a. The passage 41b is directly below the hole 41a and smoothly extends to the central cavity 1a, and the extension direction is perpendicular to the central axis.

[0040] In order to make the valve core 42 more tightly block the hole 41a, please refer to Figure 1 and 3 In an embodiment of the present application, the elastic member 43 has a plurality of spring pieces 431, which abut against the valve core 42 to prevent the valve core 42 from moving under insufficient pressure generated by negative pressure, thereby preventing unfiltered oil from being drawn out.

[0041] Further, in order to make the valve core 42 bear force uniformly, please refer to Figure 1 In an embodiment of the present application, the plurality of spring pieces 431 are uniformly distributed along the circumference of the hole 41a. Preferably, the elastic member 43 is made of metal and has good fatigue resistance.

[0042] In order to support the annular filter medium 1, please refer to Figure 1 and 3 In an embodiment of the present application, a framework 5 is arranged in the central cavity 1a. The framework 5 is a hollow support frame, and its two ends are connected to the first end cover 2 and the second end cover 3, respectively, and connected to the inner side of the annular filter medium 1. The connection methods include adhesion, embedding, etc., which will not be described in detail here.

[0043] For filtering water in oil, please refer to Figure 1 and 3 In an embodiment of the present application, a support 6 is sleeved on the periphery of the annular filter medium 1, and a water-blocking net 7 is inlaid on the support 6, so that when the oil passing through the annular filter medium 1 passes through the water-blocking net 7, the water in the oil is blocked. The two ends of the support 6 are connected with the first end cover 2 and / or the second end cover 3, or are connected with the filter housing, so as to fix the support 6; in the embodiment, the upper end of the support 6 is connected with the first end cover 2.

[0044] The present application further provides a filter, which comprises a shell and the filter element 100 described above, the filter element 100 being installed inside the shell, the shell having a fuel inlet communicating with the central cavity 1a (i.e. the dirty side of the filter element 100) and a fuel outlet communicating with the clean side (i.e. the outer side) of the filter element 100. Please refer to Figure 1 It should be noted that the first end cover 2 is provided with a through hole 2b communicating with the fuel inlet. In addition, the lower end of the support 6 is further provided with a sealing member, which is sealingly connected with the inner wall of the shell, so that the oil more fully passes through the water-blocking net, and the oil containing water is prevented from being sucked away.

[0045] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that they are within the scope of the present application.

[0046] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A filter cartridge having a bypass valve, characterized by, The application relates to a filter element, comprising: a ring-shaped filter medium (1) having a central cavity (1a) arranged around a central axis; a first end cover (2) and a second end cover (3) connected to two ends of the ring-shaped filter medium (1), the first end cover (2) being eccentrically provided with an opening (2a); and a bypass valve (4) arranged in the opening (2a), the bypass valve (4) comprising a valve body (41) having a hole (41a), a valve core (42) for closing the hole (41a) and an elastic member (43) for pressing the valve core (42) close to the hole (41a), the hole (41a) being communicated with the central cavity (1a); wherein the valve body (41) and the first end cover (2) are hot melt welded or integrally injection molded. The hole (41a) is circular, and the valve core (42) is spherical. An annular raised wall (21) is arranged on an end surface of the first end cover (2), and the annular raised wall (21) forms the opening (2a). A clamping portion (211) is arranged on the annular raised wall (21), and the elastic member (43) is connected to the clamping portion (211). The valve body (41) has a channel (41b) communicated with the hole (41a) and the central cavity (1a).

2. The filter cartridge with a bypass valve of claim 1, wherein, The elastic member (43) has a plurality of elastic pieces (431) uniformly distributed along a circumference of the hole (41a), and the plurality of elastic pieces (431) are in contact with the valve core (42).

3. The filter cartridge with a bypass valve of claim 1, wherein, The valve body (41) and the first end cover (2) are made of plastic.

4. The filter cartridge with a bypass valve of claim 3, wherein, A framework (5) arranged in the central cavity (1a) is further arranged for supporting the ring-shaped filter medium (1).

5. The filter cartridge with a bypass valve of claim 1, wherein, A support (6) sleeved on an outer periphery of the ring-shaped filter medium (1) and a water-blocking net (7) inlaid on the support (6) are further arranged.

6. The filter cartridge with a bypass valve of claim 1, wherein, The application further relates to a filter device, comprising a shell and the filter element as claimed in any one of claims 1-9 arranged in the shell, the shell having a fuel inlet communicated with the central cavity (1a) and a fuel outlet.

7. The filter cartridge with a bypass valve of claim 1, wherein, ​ 8. The filter cartridge with a bypass valve of claim 1, wherein, ​ 9. The filter cartridge with a bypass valve of claim 1, wherein, ​ 10. A filter characterized by, ​

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