Diesel oil filter capable of preventing backflow

Abstract

The utility model discloses an anti-backflow diesel oil filter which comprises a shell, a cover plate, a filter element composed of a filter frame and filter paper, an oil inlet pipe and an oil outlet pipe, and further comprises a flow guide unit installed in the oil inlet pipe, wherein the flow guide unit is connected between the oil inlet pipe and the filter paper; the flow guide unit comprises a supporting ring which is fixedly connected to the bottom end of the oil inlet pipe; the flow guide plate is fixedly mounted on the supporting ring; the guide plate comprises a connecting part which is arranged at the top end of the guide plate and is fixedly connected with the supporting ring; the guide part is fixedly connected to the bottom end of the connecting part; wherein the guide part is conical, the outer end of the guide part is in contact with the filter paper, and in daily production and life, through the arrangement of the supporting ring and the flow guide plate, the guide function can be achieved, and diesel oil can be prevented from flowing back.

Description

Technical Field

[0001] The utility model relates to a diesel filter for preventing backflow. Background Art

[0002] A filter is an accessory that filters impurities or gases through filter paper. It generally refers to a car filter, which is an engine accessory. The filter can be divided into: oil filter, gasoline filter, diesel filter, oil-water separator, hydraulic filter, air filter and air conditioning filter, etc. The function of the diesel filter is to filter out harmful impurities and moisture in the fuel system, protect the normal operation of the engine, reduce wear, avoid blockage, and increase the life of the engine. However, the current diesel filter is not convenient for people to replace the internal filter element.

[0003] A filter that is easy to replace the filter element is available, for example, a diesel filter with patent number CN213063809U, which includes a shell and a filter element body. Grooves are provided at both left and right ends of the bottom of the inner cavity of the shell, a spring is fixedly connected to the bottom of the inner cavity of the groove, a connecting plate is fixedly connected to the top of the spring, plug blocks are fixedly connected to the left and right ends of the upper and lower surfaces of the filter element body, a cover plate is movably connected to the top of the shell, slots are provided at the top of the connecting plate and the left and right ends of the bottom of the cover plate, the cover plate is movably connected to the inner cavity of the slot, the upper parts of the left and right sides of the shell are fixedly connected to first fixed blocks, and the bottoms of the left and right sides of the cover plate are fixedly connected to second fixed blocks.

[0004] This embodiment can solve the problem that the existing diesel filter is inconvenient for people to replace the internal filter element and is inconvenient for people to use, but it has the following defects:

[0005] 1. There is no anti-backflow structure inside the filter, and the diesel in the filter will flow back into the engine;

[0006] 2. When the engine is in use, the filter will be affected by vibration and become loose. Summary of the invention

[0007] The utility model aims to solve one of the technical problems existing in the prior art.

[0008] The present application provides a diesel filter for preventing backflow, comprising a housing, a cover plate, a filter element composed of a filter frame and filter paper, an oil inlet pipe and an oil outlet pipe, and also comprising:

[0009] A flow guide unit, which is installed in the oil inlet pipe;

[0010] Wherein, the flow guide unit is connected between the oil inlet pipe and the filter paper.

[0011] The diversion unit includes:

[0012] A support ring, which is fixedly connected to the bottom end of the oil inlet pipe;

[0013] The guide plate is fixedly mounted on the supporting ring.

[0014] The deflector includes:

[0015] A connecting portion, which is arranged at the top end of the guide plate and is fixedly connected to the supporting ring;

[0016] A guide portion fixedly connected to the bottom end of the connecting portion;

[0017] The guide part is arranged in a cone shape, and the outer end thereof contacts the filter paper.

[0018] Also includes:

[0019] A filter screen is fixedly mounted on a filter frame;

[0020] The filter screen is arranged outside the filter paper, and its mesh openings are smaller than the mesh openings of the filter paper.

[0021] Also includes:

[0022] A mounting ring groove is arranged on the outer wall of the housing;

[0023] A support assembly is mounted on the mounting ring groove.

[0024] The support components include:

[0025] A fixing ring, which is sleeved in the mounting ring groove;

[0026] A connecting piece, which is fixedly connected to one end of the fixing ring;

[0027] A fixing plate, which is fixedly connected to the other end of the fixing ring;

[0028] Wherein, the connecting plate is connected to the fixing plate through a fastener.

[0029] The connecting piece is made of elastic material.

[0030] Also includes:

[0031] A pair of convex rings are respectively installed in the middle of the oil inlet pipe and the oil outlet pipe.

[0032] The beneficial effects of the utility model are as follows:

[0033] 1. The setting of support ring and guide plate can not only play a guiding role, but also prevent diesel from flowing back;

[0034] 2. By setting the fixing ring, connecting plate and fixing plate, the housing can be locked on the vehicle chassis to ensure the stability of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1A cross-sectional view of a diesel filter for preventing backflow in an embodiment of the present application;

[0036] Figure 2 A top view of a flow guide unit in an embodiment of the present application;

[0037] Figure 3 It is a schematic diagram of the installation structure of the support assembly in the embodiment of the present application.

[0038] Reference numerals

[0039] 1-housing, 2-cover plate, 3-filter element, 301-filter frame, 302-filter paper, 4-oil inlet pipe, 5-oil outlet pipe, 6-flow guide unit, 7-support ring, 8-flow guide plate, 801-connecting part, 802-guide part, 9-filter screen, 10-mounting ring groove, 11-support assembly, 12-fixing ring, 13-connecting plate, 14-fixing plate, 15-convex ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] The server provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] like Figure 1 , Figure 2 As shown, an embodiment of the present application provides a diesel filter for preventing backflow, including a housing 1, a cover plate 2, a filter element 3 composed of a filter frame 301 and a filter paper 302, an oil inlet pipe 4 and an oil outlet pipe 5, and also includes: a guide unit 6, which is installed in the oil inlet pipe 4; wherein the guide unit 6 is connected between the oil inlet pipe 4 and the filter paper 302.

[0045] Furthermore, the guide unit 6 includes a support ring 7, which is fixedly connected to the bottom end of the oil inlet pipe 4; a guide plate 8, which is fixedly installed on the support ring 7; the guide plate 8 includes a connecting portion 801, which is arranged at the top end of the guide plate 8 and is fixedly connected to the support ring 7; a guide portion 802, which is fixedly connected to the bottom end of the connecting portion 801; wherein the guide portion 802 is arranged in a conical shape, and the outer end is in contact with the filter paper 302.

[0046] In this embodiment of the present application, due to the adoption of the above structure, diesel enters the filter element 3 from the oil inlet pipe 4, is filtered by the filter element 3, and is discharged from the oil outlet pipe 5. The diesel passes through the support ring 7 and flows into the guide plate 8 from the through grooves distributed on the support ring 7. The diesel flows from the connecting portion 801 to the guide portion 802. The guide portion 802 is set in a downwardly extending cone. The outer end surface of the guide portion contacts the filter paper 302, so that the diesel can be evenly guided to the filter paper 302, thereby ensuring the uniformity of filtration. And because the guide portion 802 of the guide plate 8 is set in a cone, it can prevent the diesel from flowing back.

[0047] Embodiment 2:

[0048] like Figure 1 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, it also includes: a filter screen 9, which is fixedly mounted on the filter frame 301; wherein the filter screen 9 is arranged on the outside of the filter paper 302, and its mesh size is smaller than the mesh size of the filter paper 302.

[0049] In this embodiment of the present application, due to the adoption of the above-mentioned structure, after the diesel enters the filter element 3, it is first filtered through the filter paper 302 for the first time, and then filtered through the filter mesh 9 for the second time. Since the mesh holes of the filter paper 302 are larger than the mesh holes of the filter mesh 9, the combination of the filter paper 302 and the filter mesh 9 can filter the impurities in the diesel in turn, thereby improving the purity of the filtration.

[0050] Embodiment 3:

[0051] like Figure 3 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, it also includes: a mounting ring groove 10, which is arranged on the outer wall of the housing 1; and a support assembly 11, which is mounted on the mounting ring groove 10.

[0052] Furthermore, the support assembly 11 includes a fixing ring 12, which is sleeved in the mounting ring groove 10; a connecting plate 13, which is fixedly connected to one end of the fixing ring 12; and a fixing plate 14, which is fixedly connected to the other end of the fixing ring 12; wherein the connecting plate 13 is connected to the fixing plate 14 via a fastener.

[0053] Furthermore, the connecting piece 13 is made of elastic material.

[0054] Furthermore, it also includes a pair of convex rings 15, which are respectively installed in the middle of the oil inlet pipe 4 and the oil outlet pipe 5.

[0055] In this embodiment of the present application, due to the adoption of the above structure, in order to improve the stability of the filter installation, the fixing ring 12 is set in the installation ring groove 10, and the housing 1 is installed on the vehicle chassis through the connection between the connecting plate 13 and the fixing plate 14. The connecting plate 13 and the fixing plate 14 are both provided with corresponding through holes, which are convenient for bundling. The two through holes are aligned, and then the connecting plate 13 and the fixing plate 14 are connected using fasteners (a combination of bolts and nuts). The connecting plate 13 is made of elastic material, and rubber can be selected for non-metallic materials, and stainless steel can be selected for metals. The selection of elastic materials makes the connecting plate 13 have the characteristics of elastic deformation, which increases the range of installation. In addition, a convex ring 15 is provided in the middle of the oil inlet pipe 4 and the oil outlet pipe 5, so that the connection between the oil inlet pipe 4 and the oil outlet pipe 5 and the filter is more reliable.

[0056] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A diesel filter for preventing backflow, comprising a housing (1), a cover plate (2), a filter element (3) composed of a filter frame (301) and filter paper (302), an oil inlet pipe (4) and an oil outlet pipe (5), characterized in that: Also includes: A flow guide unit (6) installed in the oil inlet pipe (4); Wherein, the flow guide unit (6) is connected between the oil inlet pipe (4) and the filter paper (302).

2. A diesel filter for preventing backflow according to claim 1, characterized in that: The flow guiding unit (6) comprises: A support ring (7) fixedly connected to the bottom end of the oil inlet pipe (4); A guide plate (8) is fixedly mounted on the support ring (7).

3. A diesel filter for preventing backflow according to claim 2, characterized in that: The guide plate (8) comprises: A connecting portion (801), which is arranged at the top end of the guide plate (8) and is fixedly connected to the support ring (7); A guide portion (802) fixedly connected to the bottom end of the connecting portion (801); The guide portion (802) is arranged in a conical shape, and the outer end is in contact with the filter paper (302).

4. A diesel filter for preventing backflow according to claim 1, characterized in that: Also includes: A filter screen (9) fixedly mounted on the filter frame (301); The filter screen (9) is arranged outside the filter paper (302), and its mesh openings are smaller than the mesh openings of the filter paper (302).

5. The diesel filter for preventing backflow according to claim 1, characterized in that: Also includes: A mounting ring groove (10) arranged on the outer wall of the housing (1); A support assembly (11) is mounted on the mounting ring groove (10).

6. A diesel filter for preventing backflow according to claim 5, characterized in that: The support assembly (11) comprises: A fixing ring (12) sleeved in the mounting ring groove (10); A connecting piece (13) fixedly connected to one end of the fixing ring (12); A fixing plate (14) fixedly connected to the other end of the fixing ring (12); Wherein, the connecting piece (13) is connected to the fixing piece (14) via a fastener.

7. A diesel filter for preventing backflow according to claim 6, characterized in that: The connecting piece (13) is made of elastic material.

8. The diesel filter for preventing backflow according to claim 1, characterized in that: Also includes: A pair of convex rings (15) are respectively installed at the middle of the oil inlet pipe (4) and the oil outlet pipe (5).

Images