Filter structure and filter valve

Abstract

The utility model relates to valve technical field, concretely is a kind of filtering structure and filter valve, fixed cylinder is equipped with several oil outlets on the lateral wall of fixed cylinder along the axial direction interval;Anti-dropping disc, the anti-dropping disc is fixed in the lower end of fixed cylinder;Support skeleton, the support skeleton is fixed on the outer wall of fixed cylinder;Annular filter screen, the annular filter screen is movably sleeved in support skeleton outside.The utility model sets up fixed cylinder and support skeleton, can carry out rigid support to annular filter screen inboard, can evenly disperse fluid pressure to entire filter screen surface, still can keep cylindrical form under high flow condition, fundamentally solve the deformation, precision drop and short life etc. caused by lack of support of traditional cylinder filter screen, significantly reduce operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a filter structure and a filter valve. Background Technology

[0002] In fluid transport systems, filter valves are widely used as key protective components in hydraulic transmission, fuel transport, water treatment and other scenarios. Their core function is to intercept impurities in the transported medium, ensuring the stable operation of terminal equipment such as pumps, valves, and stoves, effectively extending the service life of the equipment and reducing the risk of failure.

[0003] Existing filter valves mainly consist of a valve body, an internal filter screen, and a pipe interface. The valve body is mostly a shell structure with a flow channel. To overcome the limitation of the valve body space on the filtration area, the filter screen is usually designed as a cylindrical structure. The cylindrical three-dimensional space expands the filtration area to meet the impurity interception requirements under high flow conditions.

[0004] However, traditional designs, in order to reduce costs and simplify processes, generally do not include a rigid structure inside the cylindrical filter screen. When the medium flows through, under the impact of fluid pressure, the screen wall is prone to radial indentation due to lack of support, which in turn causes deformation of the filter screen pores and structural collapse, affecting the normal operation of the filter valve. To address this, we propose a filter structure and filter valve to effectively solve the above-mentioned drawbacks. Utility Model Content

[0005] The purpose of this utility model is to provide a filter structure and filter valve to solve the problem mentioned in the background art that the mesh wall is prone to radial depression due to lack of support in the prior art.

[0006] This utility model is achieved through the following technical solution: a filter structure, comprising:

[0007] The fixed cylinder has several oil passages spaced axially on its side wall;

[0008] An anti-detachment disc is fixed to the lower end of a fixed cylinder;

[0009] A support frame is fixed to the outer wall of the fixed cylinder;

[0010] A ring-shaped filter screen is movably fitted outside the supporting frame.

[0011] Optionally, the annular filter screen is made of a high-density filter screen.

[0012] Optionally, the support frame includes several support rings fixed to the outer wall of the fixed cylinder, with each support ring distributed at equal intervals along the axial direction of the fixed cylinder.

[0013] Optionally, the support frame includes support protrusions fixed to the outer wall of the fixed cylinder, and the support protrusions are spirally distributed along the axial direction of the fixed cylinder.

[0014] This utility model also provides a filter valve, including the filter structure as described above, and a hollow valve body, with a valve cover detachably connected to the top inner part of the valve body.

[0015] The fixed cylinder is detachably connected to the bottom of the valve cover and is coaxially arranged with the valve body. An oil outlet communicating with the fixed cylinder is passed through the valve cover.

[0016] The annular filter screen is located between the valve cover and the anti-detachment disc, and an annular gap is left between the annular filter screen and the valve body.

[0017] Optionally, the valve cover has a first internal hexagon countersunk hole at the top, a first external thread on the outer wall of the valve cover, and a first internal thread that helically engages with the first external thread on the inner wall of the valve body.

[0018] The valve cover is detachably connected to the valve body through the engagement of the first external thread and the first internal thread.

[0019] Optionally, the bottom of the anti-detachment disc is provided with a second internal hexagon countersunk hole, and the upper end of the fixing cylinder is open.

[0020] A connecting ring is fixed to the bottom of the valve cover. A second external thread is provided on the outer wall of the connecting ring, and a second internal thread that is helically engaged with the second external thread is provided on the inner wall of the fixed cylinder.

[0021] The fixed cylinder is detachably connected to the valve cover through the engagement of the connecting ring, the second external thread, and the second internal thread.

[0022] Compared with the prior art, this utility model provides a filter structure and filter valve, which have the following characteristics:

[0023] Beneficial effects:

[0024] This invention, by setting a fixed cylinder and a supporting frame, can provide rigid support for the inner side of the annular filter screen, which can evenly distribute the fluid pressure to the entire filter screen surface. It can still maintain the cylindrical shape under high flow conditions, fundamentally solving the problems of deformation, reduced accuracy and short life of traditional cylindrical filter screens due to lack of support, and significantly reducing operation and maintenance costs. Attached Figure Description

[0025] Figure 1 This is an assembly drawing of the present utility model;

[0026] Figure 2 This is an exploded view of the present invention;

[0027] Figure 3 This is an exploded view of the fixing cylinder of this utility model;

[0028] Figure 4 This is a schematic diagram of the valve cover of this utility model;

[0029] Figure 5 This is a schematic diagram of the supporting protrusion of this utility model.

[0030] In the diagram: 1. Valve body; 2. Valve cover; 3. Fixing cylinder; 4. Oil inlet; 5. Oil outlet; 6. Anti-detachment disc; 7. Support frame; 701. Support ring; 702. Support ridge; 8. Annular filter screen; 9. First internal hexagon countersunk hole; 10. Second internal hexagon countersunk hole; 11. Connecting ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1: Please refer to Figures 1 to 4 A filter structure includes: a fixed cylinder 3, an anti-detachment disc 6, a support frame 7, and an annular filter screen 8.

[0033] Several oil passages 4 are spaced axially on the side wall of the fixed cylinder 3, allowing oil or liquid to enter the interior of the fixed cylinder 3 through the oil passages 4. The anti-detachment disc 6 is fixed to the lower end of the fixed cylinder 3 to prevent the annular filter screen 8 from axially detaching.

[0034] In addition, the support frame 7 is fixed to the outer wall of the fixed cylinder 3; the annular filter screen 8 is movably sleeved on the outside of the support frame 7; the support frame 7 supports and isolates the annular filter screen 8, ensuring that the medium can penetrate evenly along the radial direction of the annular filter screen 8. In this embodiment, the annular filter screen 8 is made of high-density filter screen, which can filter most of the impurities in oil or liquid, preventing impurities from entering the pump body or downstream equipment, thus making the pump body or downstream equipment less prone to damage.

[0035] The above design, through the cooperation of the fixed cylinder 3 and the supporting frame 7, provides rigid support to the inner side of the annular filter screen 8, thereby evenly distributing the fluid pressure across the entire filter screen surface. This results in a 4-fold increase in impact resistance compared to traditional single-layer mesh structures, particularly at high flow rates (>100m³ / h). 3 Under the condition of / h), it can still maintain the complete cylindrical shape, avoiding the problem of impurities escaping due to local collapse.

[0036] In this embodiment, the support frame 7 includes several support rings 701 fixed to the outer wall of the fixed cylinder 3. Each support ring 701 is evenly distributed along the axial direction of the fixed cylinder 3. It can not only provide stable support for the annular filter screen 8, but also form a uniform gap between the filter screen and the fixed cylinder 3, so that the medium can penetrate evenly along the radial direction of the annular filter screen 8, and then flow smoothly into the cylinder through the oil passage 4 on the wall of the fixed cylinder 3. This effectively avoids the problem of local blockage caused by uneven filtration space, and ensures the uniformity of medium flow and filtration efficiency.

[0037] Example 2: Please refer to Figure 5 This embodiment also proposes a filtering structure. The difference between this embodiment and Embodiment 1 is that:

[0038] The support frame 7 includes support protrusions 702 fixed to the outer wall of the fixed cylinder 3, and the support protrusions 702 are spirally distributed along the axial direction of the fixed cylinder 3. In Embodiment 1, the support rings 701 are axially evenly distributed, forming several contact zones with the inner wall of the filter screen in an intermittent annular support. The support force is concentrated in a specific cross section, which easily creates a suspended section of the filter screen in the inter-ring area, resulting in uneven stress and deformation risk. Especially under high flow rate or fibrous impurity conditions, the filter screen between the rings is prone to deformation due to lack of support.

[0039] In this embodiment, the support ridge 702 covers the outer wall of the fixed cylinder 3 in a continuous spiral shape, forming a continuous linear support with the filter screen. This distributes the support force evenly across the entire surface, not only rigidly maintaining the cylindrical shape of the filter screen but also reducing stress concentration through the grid effect of the spiral skeleton. In high viscosity or complex impurity conditions, its continuous support characteristics can prevent fiber entanglement and reduce the impact of media impact. Compared with the support ring design, it extends the support life by more than 2 times, significantly improving the structural stability of the filter screen.

[0040] Example 3: This example also provides a filter valve, including the filter structure in Example 1 or Example 2, and a hollow valve body 1. A liquid outlet is fixed at the top of the valve body 1 for connection to the pump body; a liquid inlet is fixed at the bottom of the valve body 1 for connection to the pipeline; in use, oil or liquid passes through the valve body 1 from bottom to top and enters the pump body.

[0041] A valve cover 2 is detachably connected to the top inner part of the valve body 1. Specifically, the top of the valve cover 2 has a first internal hexagon countersunk hole 9, the outer wall of the valve cover 2 has a first external thread, and the inner wall of the valve body 1 has a first internal thread that screws into the first external thread. The valve cover 2 is detachably connected to the valve body 1 through the engagement of the first external thread and the first internal thread. When it is necessary to replace or maintain other components inside the valve body 1, an external hexagon wrench is inserted into the first internal hexagon countersunk hole 9, and then the valve cover 2 is rotated to unscrew it from the valve body 1, thereby enabling the replacement or maintenance of other components inside the valve body 1.

[0042] It should be added that the fixed cylinder 3 is detachably connected to the bottom of the valve cover 2 and is coaxially arranged with the valve body 1. An oil outlet 5 communicating with the fixed cylinder 3 is passed through the valve cover 2. The annular filter screen 8 is located between the valve cover 2 and the anti-detachment disc 6 and is not easily moved axially. An annular gap is left between the annular filter screen 8 and the valve body 1. Oil or liquid enters the annular gap through the bottom of the valve body 1, is then filtered by the annular filter screen 8, enters the fixed cylinder 3 through the oil outlet 4, and is finally discharged through the oil outlet 5.

[0043] In this embodiment, the bottom of the anti-detachment disc 6 is provided with a second internal hexagon countersunk hole 10, and the upper end of the fixing cylinder 3 is open. A connecting ring 11 is fixed to the bottom of the valve cover 2, which can be inserted into the upper end of the fixing cylinder 3. A second external thread is provided on the outer wall of the connecting ring 11, and a second internal thread is provided on the inner wall of the fixing cylinder 3, which is screwed into the second external thread. The fixing cylinder 3 is detachably connected to the valve cover 2 through the engagement of the connecting ring 11, the second external thread, and the second internal thread. After removing the valve cover 2 from the valve body 1, it can be directly rotated by hand to separate the valve cover 2 from the fixing cylinder 3. If it cannot be rotated by hand, one external hexagonal wrench is inserted into the first internal hexagon countersunk hole 9, and another external hexagonal wrench is inserted into the second internal hexagon countersunk hole 10. Then, the valve cover 2 and the fixing cylinder 3 are rotated relative to each other to separate the fixing cylinder 3 from the valve cover 2, allowing the annular filter screen 8 to be removed for cleaning or replacement.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter structure, characterized in that, include: The fixed cylinder (3) has several oil passages (4) spaced apart along the axial direction on the side wall of the fixed cylinder (3); Anti-detachment disc (6), the anti-detachment disc (6) is fixed to the lower end of the fixing cylinder (3); A support frame (7) is fixed to the outer wall of the fixed cylinder (3); A ring-shaped filter (8) is movably fitted outside the support frame (7).

2. The filter structure according to claim 1, characterized in that: The annular filter (8) is composed of a high-density filter.

3. The filter structure according to claim 1, characterized in that: The support frame (7) includes several support rings (701) fixed to the outer wall of the fixed cylinder (3), and each support ring (701) is distributed at equal intervals along the axial direction of the fixed cylinder (3).

4. The filter structure according to claim 1, characterized in that: The support frame (7) includes a support protrusion (702) fixed to the outer wall of the fixed cylinder (3), and the support protrusion (702) is spirally distributed along the axial direction of the fixed cylinder (3).

5. A filter valve, comprising the filter structure as described in any one of claims 1-4, characterized in that: It also includes a hollow valve body (1), with a valve cover (2) detachably connected to the inner top of the valve body (1); The fixed cylinder (3) is detachably connected to the bottom of the valve cover (2) and is coaxially arranged with the valve body (1). An oil outlet (5) communicating with the fixed cylinder (3) is passed through the valve cover (2). The annular filter screen (8) is located between the valve cover (2) and the anti-detachment disc (6), and there is an annular gap between the annular filter screen (8) and the valve body (1).

6. A filter valve according to claim 5, characterized in that: The valve cover (2) has a first internal hexagon countersunk hole (9) on its top, a first external thread on the outer wall of the valve cover (2), and a first internal thread that is helically engaged with the first external thread on the inner wall of the valve body (1). The valve cover (2) is detachably connected to the valve body (1) by the engagement of the first external thread and the first internal thread.

7. A filter valve according to claim 5, characterized in that: The bottom of the anti-detachment disc (6) is provided with a second internal hexagon countersunk hole (10), and the upper end of the fixing cylinder (3) is open. A connecting ring (11) is fixed to the bottom of the valve cover (2). A second external thread is provided on the outer wall of the connecting ring (11), and a second internal thread is provided on the inner wall of the fixed cylinder (3) in a helical fit with the second external thread. The fixed cylinder (3) is detachably connected to the valve cover (2) through the engagement of the connecting ring (11), the second external thread and the second internal thread.

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