Filter unit for filtering a liquid pressure medium
Patent Information
- Application Number
- CN202521565971.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-11-21
- Filing Date
- 2025-07-25
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-07-25
AI Technical Summary
每隔一段时间需要通过反冲洗过程来清洁滤芯，例如，识别到需要反冲洗的条件是，在入口和出口之间在液压介质流过过滤单元时的压力损失过大
[0008]在此，被设置在过滤模块处的唯一的反冲洗联接部能够实现不仅反冲洗第一滤芯而且反冲洗第二滤芯。为此，阀插入件通过位于内部通道如此与反冲洗联接部相连接，使得根据阀插入件、确切地说被容纳在其中的阀元件的接入，或者可以反冲洗第一滤芯，而可以利用第二滤芯继续进行过滤，或者可以反冲洗第二滤芯，而第一滤芯仍然被压力介质持续穿流。两个反冲洗过程通过唯一的共用的反冲洗联接部冲洗滤芯。
Smart Images
Figure CN224777541U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a filter unit for filtering liquid pressure media, which has a filter module, a first filter element and a second filter element installed in the filter module, wherein a first valve insert and a second valve insert are provided in fluid connection with the filter element, wherein the filter module has an inlet through which the pressure medium can enter the filter module, and the inlet is in fluid connection with the valve insert, and wherein the filter module has an outlet connected to the filter element. Background Technology
[0002] Filtering units for filtering liquid pressure media, based on filter modules, have a long history. Filter modules are typically constructed from machined steel blocks, with filter elements and valve inserts inserted into corresponding receiving holes within the module. For the filter unit to function, these receiving holes within the filter module are interconnected via corresponding channels. Therefore, filter modules typically have a cuboid base, with the filter element, valve insert, and inlet and outlet points introduced into the corresponding outer plane of the cuboid-shaped filter module.
[0003] This type of filter unit is used in high-pressure applications, such as underground mining, where the filter unit filters fluids, especially oils, which are guided through the filter module at overpressures of 350 bar or higher, and where temperatures may reach 80°C or higher. For example, this type of filter unit can filter oils used in hydraulic applications such as moving and / or clamping underground protective covers, sliders, etc. In this respect, the application conditions for this type of filter unit are relatively harsh. On the other hand, the design of the filter unit needs to be space-saving, so that the filter module itself should have the smallest possible external dimensions.
[0004] Another key feature of this type of filter unit is its backwashing function. The filter elements need to be cleaned periodically through a backwashing process. For example, backwashing is identified when there is excessive pressure loss between the inlet and outlet as the hydraulic medium flows through the filter unit. This pressure loss can be monitored by a sensor system and control unit, allowing the filter elements to be automatically backwashed via a correspondingly controlled valve insert. Normal operation of the filter unit, i.e., the flow of the pressurized medium from the inlet to the outlet, can also continue during backwashing; that is, if one filter element is backwashed, the corresponding other filter element takes over the filtration of the pressurized medium. This is achieved by correspondingly controlling the valve insert. Summary of the Invention
[0005] The purpose of this invention is to provide a small-scale implementation scheme for a filter unit that achieves a high flow rate while minimizing the size of the filter module, and which also retains the backwashing function of the filter unit.
[0006] This utility model includes the following technical teachings: the filter module has a unique backwash connection, which is connected to a valve insert so that the filter element can be backwashed when the valve insert is connected accordingly, and the backwash connection serves as an outlet during backwashing.
[0007] The core idea of this invention is to provide a filter module with a small size, which has a very compact structure due to a single backwash connection. In this way, the filter unit can still be connected to a pressure medium with a working pressure of 350 bar and a temperature of 80°C, despite its small size.
[0008] Here, a single backwash connection located at the filter module enables backwashing not only of the first filter element but also of the second filter element. For this purpose, a valve insert is connected to the backwash connection via an internal channel, such that, depending on the insertion of the valve insert, or more precisely, the valve element housed therein, either the first filter element can be backwashed while filtration continues using the second filter element, or the second filter element can be backwashed while the first filter element continues to be permeated by the pressurized medium. Both backwashing processes flush the filter elements through this single, shared backwash connection.
[0009] By introducing an advantageous design scheme for connecting the valve and the filter in the filter module, a very compact filter module structure is produced with a small main size, in which the filter unit remains unchanged and can still be used for pressure media under high pressure and high temperature.
[0010] The filter module has an envelope, for example, in the shape of a cuboid. While the envelope is essentially cuboid, the filter module may deviate from a mathematical cuboid, for example, due to partial face retraction or edge breaks. Preferably, the filter module is designed as a flat cuboid with a basic shape having approximately the same side length, wherein the height of the basic shape is, for example, less than one-third of the side length. For example, the envelope has main dimensions of 160 mm to 220 mm in width, preferably 170 mm to 210 mm in height, particularly preferably 180 mm to 200 mm in height, and most preferably 188 mm to 190 mm in height.
[0011] The main dimensions of the filter module can be combined with such a filter module depth, for example, a depth of 45mm to 75mm, preferably 50mm to 65mm, more preferably 55mm to 62mm, and most preferably 58mm. The directions of extension of the width, height, and depth are perpendicular to each other.
[0012] For example, the envelope of the filter module can have a width of 189 mm, a height of 190 mm, and a depth of 58 mm. Recesses can be provided at the corners of the filter module, with one side measuring 40 mm (reduced in height) and the other side measuring 51.5 mm (reduced in width). All edges between the sides of the height, width, and depth (optional) can be chamfered or rounded.
[0013] The first and second filter elements each have a longitudinal extension, hereinafter referred to as the first longitudinal extension, wherein the longitudinal extensions of the two filter elements extend parallel to each other. However, the filter elements are installed in the filter module in a manner that is staggered from each other along the longitudinal extension direction, thereby achieving an advantageous design of the channels extending in the filter module. The filter element is inserted into the filter module from the side, in particular screwed into the filter module, wherein this is achieved by a recess, through which the second filter element is inserted into the filter module by the rearward offset of the outer side due to the recess. This achieves the arrangement of the second filter element along the first longitudinal extension in a manner that is staggered relative to the position of the second filter element along the same parallel first longitudinal extension.
[0014] The first valve insert and the second valve insert are arranged to extend perpendicularly to the first longitudinal extension of the filter element in their respective longitudinal extensions (hereinafter referred to as the second longitudinal extension). The valve inserts are designed to receive valve elements, and the channels introduced into the filter module are designed to either travel perpendicular to the second longitudinal extension of the valve inserts or extend along the second longitudinal extension.
[0015] For the channels in the filter module, it is preferably specified that an input channel connecting the inlet to the first valve insert and the second valve insert is provided in the first depth plane of the filter module, and / or a first intermediate channel is provided between the first valve insert and the first filter element and / or a second intermediate channel is provided between the second valve insert and the second filter element. Optionally, an output channel connecting the second filter element to the outlet may be provided. Particularly advantageously, the above-described channels are introduced into the filter module together in the first depth plane, i.e., in a plane extending by width and height extension.
[0016] Therefore, a backwashing channel can be provided in a parallel second depth plane spaced apart from the first depth plane. This backwashing channel connects the first and second valve inserts to a single backwashing connection. Alternatively, an output channel connecting the first filter element to the outlet can be provided in the second depth plane. Here, the connection between the second filter element and the outlet can be located not only in the first depth plane but also in the second depth plane, and is designed as the only shared channel between the second filter element and the outlet.
[0017] The backwash connection is preferably introduced into the filter module together with the outlet on a first side of the filter module, wherein the inlet is introduced into the filter module on the opposite side to the backwash connection and the outlet. Here, these sides are defined by facing each other to form the outer surface of the filter module.
[0018] The filter element is inserted as an insertion element into a receiving port provided for it within the filtration module, which is introduced at the inlet side. Finally, the valve insert is designed as a two-position three-way valve, operable via a control fluid that can be guided by a control module.
[0019] Finally, the valve inserts can be installed outside the filter module, i.e., outside which an opposing external extension with an outlet and an inlet is introduced perpendicularly. Particularly advantageously, the two valve inserts are positioned within the filter module between the inlet and outlet, thereby further simplifying the channel arrangement within the filter module.
[0020] Preferably, the filter module is made of steel with a grade of 1.4104V, which is easy to process in ways known per se and has a strength value that allows the filter unit to withstand pressure media pressures up to 350 bar. Attached Figure Description
[0021] The following description, in conjunction with the accompanying drawings, illustrates in more detail other measures for improving the present invention, specifically the preferred embodiments thereof. Wherein: Figure 1 A perspective view of the filter unit is shown, in which the filter element is exemplarily removed. Figure 2 It shows according to Figure 1 A filter unit with a filter module, in which a filter element is inserted. Figure 3 A cross-sectional view of the filter unit is shown, wherein the cutting plane lies within a first depth plane, and Figure 4 A cross-sectional view of the filter unit is shown, in which the cutting plane is located within the second depth plane. Detailed Implementation
[0022] Figure 1 and Figure 2 Filter units 1 for filtering liquid pressure media are shown, wherein filter units 1 are essentially constructed as a one-piece filter module 10 made of machined steel. A first filter element 11 and a second filter element 12 are housed in the filter module 10, wherein filter elements 11 and 12 are accommodated in corresponding receiving holes 24 within the filter module. For illustration, the first filter element 11 is shown slightly removed, and the second filter element 12 is shown fully removed. See [reference needed]. Figure 1 . Figure 2 Two filter elements 11 and 12 are shown fully inserted into the filter module 10, wherein the filter elements 11 and 12 are inserted as insertion elements into the receiving holes 24 provided for them in the filter module 10, which are introduced into the inlet 15 side.
[0023] An inlet 15 is shown on the front side of the filter module 10, through which pressurized media can flow into the filter module 10, and the inlet 15 is arranged on the same side as the filter elements 11 and 12. On the opposite rear side, an outlet 16 is provided, and a backwash connection 17 is located below the outlet 16. On the front side, a control module 25 is attached to the filter module 10, through which the valve insert, also installed in the filter module 10, can be operated.
[0024] The filter module 10 has a cuboid-shaped envelope, defined by its main dimensions: width B, height H, and depth T. For example, the height is 190 mm, the width is 189 mm, and the depth is, for example, 58 mm. A recess 26 is introduced on the front side of the filter module 10, wherein the recess 26 is offset rearward by, for example, 40 mm in the extension direction of height H, and offset rearward by 51.5 mm in the extension direction of width B. Through the recess 26, a rearwardly offset surface 27 is created, through which the second filter element 12 is screwed into the filter module 10, while the first filter element 11 is screwed into the filter module 10 through the front surface 28. The inlet 15 is located below the arrangement of the first filter element 11. Since the outlet 16 and the backwash connection 17 are arranged on the rear side, they are not visible on the outside of the filter module 10, but a connector 29 screwed into the filter module 10 is present in the backwash connection 17.
[0025] The control module 25, mounted on the front side, is used to operate the valve in the valve insert (in Figure 1 and Figure 2 (Not visible in the text), in which the valve can be hydraulically operated, and the control module 25 is adapted for this purpose.
[0026] Figure 3The filter unit 1 is shown, wherein the filter module 10 is transversely cut, with the cutting plane of the cross-section located within a first depth plane T1, thus revealing the first filter element 11, the second filter element 12, the first valve insert 13, the second valve insert 14, the inlet 15, the outlet 16, and the backwash connection 17 in the corresponding cross-sectional view. In the neutral position of the valves in the valve inserts 13 and 14, filtration of the liquid pressure medium through the two filter elements 11 and 12 is possible. If the valves in the valve inserts 13 and 14 are connected accordingly, either the first filter element 11 can be backwashed while the second filter element 12 continues to filter the pressure medium, or in the other valve position of the valve inserts 13 and 14, the second filter element 12 can be backwashed while the first filter element 11 continues to filter the pressure medium. During backwashing, the pressure medium is guided through the backwash connection 17, in which the filter elements 11 and 12 are flowed in opposite directions. During normal operation, the pressure medium leaves the filter module 10 via outlet 16, wherein, if valve inserts 13 and 14 are connected accordingly, a portion of the pressure medium flows out of the filter module 10 via backwash connection 17.
[0027] Starting from inlet 15, the input channel 18 first extends to two valve inserts 13, 14, and a first intermediate channel 19 is provided between the first valve insert 13 and the first filter element 11, wherein a second intermediate channel 20 is also provided between the second valve insert 14 and the second filter element 12. Therefore, the pressure medium flowing in via inlet 15 can be accessed via valve inserts 13, 14 before the filter elements 11, 12, for example, to release or prevent the pressure medium from flowing through intermediate channel 19 to the first filter element 11, or to release or prevent the pressure medium from flowing from the second valve insert through the second intermediate channel 20 to the second filter element 12. Here, depending on the valve position, there is a possibility that the pressure medium may flow back from the first filter element 11 and / or the second filter element 12 to the valve inserts 13, 14 via the first intermediate channel 19 and / or via the second intermediate channel 20. Therefore, the pressure medium can flow through the valve inserts 13, 14 towards the backwash connection 17, and the backwash passage 22 extending between the two valve inserts 13, 14 and the backwash connection 17 serves this purpose, as shown in... Figure 4 As shown in the image.
[0028] Figure 3 The output channel 21 between the second filter element 12 and the outlet 16 is shown, wherein, Figure 4 The output channel 23, which also leads from the first filter element 11 to the outlet 16, is shown.
[0029] If the valve inserts 13 and 14 are connected in such a way that the pressure medium should be continuously filtered normally through the filter unit 1, the pressure medium flows from the inlet 15 through the input channel 18 through the first intermediate channel 19 to the first filter element 11, and then through the second intermediate channel 20 to the second filter element 12. After the pressure medium passes through the filter elements 11 and 12, the pressure medium reaches the outlet 16 from the first filter element 11 through the output channel 23, and reaches the outlet 16 from the second filter element 12 through the output channel 21.
[0030] If the first filter element 11 needs to be backwashed, the first valve insert 13 and the second valve insert 14 are moved to their respective positions, where, as in the normal filtration position, the pressurized medium flows to the second filter element 12 via the second intermediate channel 20, while conversely, the pressurized medium flows back from the second filter element 12 to the first filter element 11 via the rear output channel 21 and continues through the front output channel 23, thus allowing the first filter element to be flowed through in the opposite direction and therefore backwashed. Subsequently, the backwashing pressurized medium can return from the first filter element 11 to the first valve insert 13 through the first intermediate channel 19 and then flow into the second valve insert 14, ultimately reaching the backwash connection 17 via the backwash channel 22 to exit the filter unit 1. The backwashing of the first valve insert 13, also flowing through in the opposite direction, also has a cleaning effect.
[0031] If the second filter element 12 needs to be backwashed, the first valve insert 13 and the second valve insert 14 are moved to their respective positions. In these positions, as in the normal filtration position, the pressurized medium flows to the first filter element 11 via the first intermediate channel 19, while conversely, the pressurized medium flows back from the first filter element 11 to the second filter element 12 via the front output channel 23 and continuing through the rear output channel 21. Thus, the second filter element can be flowed through in the opposite direction and therefore backwashed. Subsequently, the pressurized medium used for backwashing can flow back from the second filter element 12 through the second intermediate channel 20 into the second valve insert 14, ultimately reaching the backwash connection 17 via the backwash channel 22 to exit the filter unit 1. The backwashing of the second valve insert 14, also flowing through in the opposite direction, also has a cleaning effect.
[0032] This invention is not limited in its implementation to the preferred embodiments given above. Instead, various variations are contemplated, and these variations are also used with the illustrated solution in substantially different types of implementations. All features and / or advantages derived from the claims, description, or drawings, including structural details or spatial arrangements, can be integral to this invention not only individually but also in various combinations.
[0033] List of reference numerals
[0034] 1 filter unit
[0035] 10 Filter Modules
[0036] 11 First Filter Element
[0037] 12 Second Filter Element
[0038] 13 First valve insert
[0039] 14 Second valve insert
[0040] 15 entrances
[0041] 16 Exports
[0042] 17 Backwash Connection
[0043] 18 input channels
[0044] 19 First Intermediate Passage
[0045] 20 Second Intermediate Passage
[0046] 21 output channels
[0047] 22 Backwash Channel
[0048] 23 output channels
[0049] 24 receiving holes
[0050] 25 control modules
[0051] 26 recesses
[0052] 27 backward misaligned surfaces
[0053] 28 front face
[0054] 29 Connecting parts
[0055] L1 First Longitudinal Extension
[0056] L2 Second Longitudinal Extension
[0057] B width
[0058] H height
[0059] T Depth
[0060] T1 First Depth Plane
[0061] T2 second depth plane.
Claims
1. A filter unit for filtering liquid pressure media, comprising a filter module (10), wherein a first filter element (11) and a second filter element (12) are installed in the filter module, wherein, The filter module (10) is also provided with a first valve insert (13) and a second valve insert (14) in fluid connection with the filter elements (11, 12). The filter module (10) has an inlet (15) through which a pressure medium can enter the filter module (10) and is in fluid connection with the valve insert (13, 14). The filter module (10) has an outlet (16) connected to the filter elements (11, 12). The filter module (10) is characterized by having a unique backwash connection (17) connected to the valve insert (13, 14) so that the filter elements (11, 12) can be backwashed when the valve insert (13, 14) is connected accordingly. The backwash connection (17) serves as the outlet.
2. The filter unit for filtering liquid pressure media according to claim 1, characterized in that, The filter module (10) has a rectangular envelope, wherein the main dimensions of the envelope are a width (B) of 160 mm to 220 mm, or a height (H) of 170 mm to 210 mm, or a height (H) of 180 mm to 200 mm, or a height (H) of 188 mm to 190 mm.
3. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, The depth (T) of the filter module is 45mm to 75mm, or 50mm to 65mm, or 55mm to 62mm, or 58mm.
4. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, The first filter element (11) and the second filter element (12) are inserted into the filter module (10) in such a way that they extend parallel to each other on their respective first longitudinal extensions (L1), wherein the filter elements (11, 12) are arranged to be staggered from each other on their respective first longitudinal extensions (L1).
5. The filter unit for filtering liquid pressure media according to claim 4, characterized in that, The first valve insert (13) and the second valve insert (14) are inserted into the filter module (10) parallel to each other on their respective second longitudinal extensions (L2), wherein the second longitudinal extensions (L2) are oriented perpendicular to the first longitudinal extensions (L1).
6. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, Within the first depth plane (T1) - An input channel (18) is provided to connect the inlet (15) to the first valve insert (13) and the second valve insert (14), and / or - A first intermediate channel (19) is provided between the first valve insert (13) and the first filter element (11), and / or -- A second intermediate channel (20) is provided between the second valve insert (14) and the second filter element (12), and - An output channel (21) is provided to connect the second filter element (12) to the outlet (16).
7. The filter unit for filtering liquid pressure media according to claim 6, characterized in that, Within the second depth plane (T2) - A backwash channel (22) is provided, which connects the first valve insert (13) and the second valve insert (14) to a single backwash connection (17), and / or - An output channel (23) is provided to connect the first filter element (11) to the outlet (16).
8. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, The backwash connection (17) and the outlet (16) are introduced into the filter module (10) on the first side, and the inlet (15) is introduced into the filter module (10) on the opposite side to the backwash connection (17) and the outlet (16).
9. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, The filter elements (11, 12) are inserted as insertion elements into the receiving holes (24) provided for them in the filter module (10), which are constructed on the inlet (15) side.
10. The filter unit for filtering liquid pressure media according to claim 1 or 2, characterized in that, The valve inserts (11, 12) are designed as two-position three-way valves and can be manipulated by a control fluid that is guided by a control module (25).