Filter unit for filtering a liquid pressure medium

Abstract

The utility model relates to a kind of filter units (1) for filtering liquid pressure medium, with filter module, first filter element and second filter element are installed in filter module, first valve insert and second valve insert are also provided with and filter element fluid connection, filter module has inlet, pressure medium can enter into filter module (10) via inlet, inlet is fluidly connected with valve insert, filter module (10) has outlet, outlet is connected with filter element, filter module has cuboid envelope, wherein, the main dimension of envelope is- width 282mm, height 349mm and depth 128mm, width (B), height (H) and depth (T) can also deviate from the given value up and down 30mm and / or 20mm and / or 10mm respectively, filter module has only backwashing coupling, which is connected with valve insert, so that filter element can be backwashed in the case of being connected with valve insert, and backwashing coupling is used as outlet.

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 420 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] This type of filter unit features a backwashing function, allowing the filter element to be cleaned periodically via a backwashing process. For example, backwashing is indicated when there is excessive pressure loss between the inlet and outlet as the hydraulic medium flows through the filter unit. This pressure loss is monitored by a sensor system and control unit, allowing the filter element 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 through the correspondingly controlled 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 cuboid envelope, wherein the main dimensions of the envelope are a width of 282 mm, a height of 349 mm, and a depth of 128 mm, wherein the width, height, and depth may deviate from the given values ​​by 30 mm and / or 20 mm and / or 10 mm, respectively, and the filter module has a unique backwash connection, which is connected to a valve insert in such a way that the filter element can be backwashed when the valve insert is connected accordingly, and the backwash connection serves as an outlet.

[0007] The core idea of ​​this utility model is to provide a filter module of such size that, due to the single backwash connection, it has a very compact structure with low processing complexity, wherein a filter unit of a given size can still be connected to a pressure medium with a working pressure of 420 bar and a temperature of 80°C.

[0008] Here, the single backwash connection located at the filter module enables backwashing of both the first and second filter elements. 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, specifically 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 282 mm, a height of 349 mm, and a depth of 128 mm, wherein these values ​​can also deviate from vertically by 30 mm and / or 20 mm and / or 10 mm. 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 scheme for the extended channels in the filter module.

[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 first 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 is provided within a first depth plane of the filter module, connecting an inlet also located within the first depth plane to a first valve insert and a second valve insert, wherein only the first valve insert is also located within the first depth plane. Furthermore, it is specified that a first intermediate channel is provided between the first valve insert and the first filter element. Particularly advantageously, the aforementioned channels and elements are introduced into the filter module together within the first depth plane, i.e., within a plane extending by width and height extension.

[0016] Conversely, the second valve insert, connected to the unique backwash connection via the output channel, is located in a parallel second depth plane spaced apart from the first depth plane. An output channel is provided within this second depth plane, directly connecting the second filter element to the outlet. The first filter element is also connected to the outlet via the same output channel. Here, the connection between the second filter element and the outlet can be located not only within the first depth plane but also within 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 hole provided for it in the filter module, which is introduced on the inlet side.

[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] The receiving hole for accommodating the first filter element may have a closing element on the side opposite to the insertion side of the filter element, which forms part of the output channel and / or closes the output channel.

[0021] 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

[0022] 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 that according to Figure 1 A filter unit with a filter module, in which a filter element is inserted. Figure 3 A first cross-sectional view of the filter unit is shown. Figure 4 A second cross-sectional view of the filter unit is shown. Figure 5 A cross-sectional view of the filter unit is shown, wherein the cutting plane lies within a first depth plane, and Figure 6 A cross-sectional view of the filter unit is shown, in which the cutting plane is located within the second depth plane. Detailed Implementation

[0023] Figure 1 and Figure 2Filter 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 on the inlet 15 side.

[0024] 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.

[0025] 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 349 mm, the width is 282 mm, and the depth is, for example, 128 mm. A recess 26 is introduced at the rear of the filter module 10, wherein the recess 26 is offset rearward in the extension direction of the height H and slightly less offset rearward in the extension direction of the width B. A valve control device 25 can be inserted into the recess 26, enabling the valve inserts 13 and 14 to be operated electrically or manually.

[0026] 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 there is a connector 28 in the backwash connection 17 that is screwed into the filter module 10.

[0027] Figures 3 to 6 The filter unit 1 is shown, wherein the filter module 10 is cut in different depth planes, wherein... Figure 5 The cross-sectional profile within the first depth plane T1, which is described separately, is shown in the figure, and... Figure 6 The cross-section within the second depth plane T2, which is described separately, is shown in the figure.

[0028] A first filter element 11 and a second filter element 12 extending along a first longitudinal direction L1, a first valve insert 13 and a second valve insert 14 extending along a second longitudinal direction L2, an inlet 15, an outlet 16, and a backwash connection 17 are shown, which can be seen in the corresponding cross-sectional views. 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.

[0029] 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 and 14 toward the backwash connection 17, and the backwash passage 22 extending between the two valve inserts 13 and 14 and the backwash connection 17 is used for this purpose.

[0030] Output channels 21 and 23, in the form of a single common orifice, extend between the first filter element 11 and the second filter element 12, specifically between their receiving orifice 24 and outlet 16. The output channels extend perpendicularly to the horizontally extending receiving orifice 24 and outlet 16, and are also guided from the first filter element 12 to the outlet 16. The output channels 21 and 23, in an abstract form, constitute the common intersection of the receiving orifice 24 of the first filter element 11 and the second filter element 12. Therefore, output channels 21 and 23 form a common channel.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The receiving hole 24 for accommodating the first filter element 11 has a closing element on the side opposite to the insertion side of the filter element, the closing element forming part of the output channels 21, 23 and / or closing the output channels.

[0035] 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.

[0036] List of reference numerals

[0037] 1 filter unit

[0038] 10 Filter Modules

[0039] 11 First Filter Element

[0040] 12 Second Filter Cartridge

[0041] 13 First valve insert

[0042] 14 Second valve insert

[0043] 15 entrances

[0044] 16 Exports

[0045] 17 Backwash Connection

[0046] 18 input channels

[0047] 19 First Intermediate Passage

[0048] 20 Second Intermediate Passage

[0049] 21 output channels

[0050] 22 Backwash Channel

[0051] 23 output channels

[0052] 24 receiving holes

[0053] 25 valve control device

[0054] 26 recesses

[0055] 27 Enclosed Components

[0056] 28 connectors

[0057] L1 First Longitudinal Extension

[0058] L2 Second Longitudinal Extension

[0059] B width

[0060] H height

[0061] T Depth

[0062] T1 First Depth Plane

[0063] 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) that are fluidly connected to the filter elements (11, 12). The filter module (10) has an inlet (15) through which the pressure medium can enter the filter module (10). The inlet is fluidly connected to the valve inserts (13, 14). The filter module (10) has an outlet (16) that is connected to the filter elements (11, 12). Its features are, The filter module (10) has a cuboid-shaped envelope, wherein the main dimensions of the envelope are: - Width 282mm, - Height 349mm, and - Depth 128mm, The width (B), height (H), and depth (T) can deviate from the given values ​​by 30mm and / or 20mm and / or 10mm, respectively. - The filter module (10) has a unique backwash connection (17) which is connected to the valve inserts (13, 14) so ​​that the filter elements (11, 12) can be backwashed when the valve inserts (13, 14) are connected accordingly, and the backwash connection (17) serves as an outlet.

2. The filter unit for filtering liquid pressure media according to claim 1, 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 in the direction of height (H).

3. The filter unit for filtering liquid pressure media according to claim 2, 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).

4. 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 - An output channel (21) is provided to connect the second filter element (12) to the outlet (16).

5. The filter unit for filtering liquid pressure media according to claim 4, characterized in that, Within the second depth plane (T2) - A second intermediate channel (20) is provided between the second valve insert (14) and the second filter element (12), and / or - An output channel (23) is provided to connect the first filter element (12) to the outlet (16).

6. 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).

7. The filter unit 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 introduced into the inlet (15) side.

8. The filter unit according to claim 1 or 2, characterized in that, The valve inserts (13, 14) are designed as two-position three-way valves and can be operated by the valve control device (25).

9. The filter unit according to claim 1 or 2, characterized in that, The filter module (10) is arranged laterally with a recess (26) on the side and / or relative to the valve inserts (13, 14).

10. The filter unit according to claim 1 or 2, characterized in that, The receiving hole (24) for receiving the first filter element (11) has a closing element (30) on the side opposite to the insertion side of the filter element (11), which forms part of the output channel (21, 23) and / or closes the output channel.

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