Multi-stage composite coalescence filter

Abstract

The utility model belongs to the technical field of coalescence filtration, and mainly relates to a multi-stage composite coalescence filter, which comprises a tank body, an upper end socket is arranged at the upper end of the tank body, and a blow-off pipe is connected to the lower end of the tank body; the filter element module is arranged in the tank body; the filter element module comprises an upper fixing disc and a lower fixing disc, a plurality of filter element assemblies are arranged between the upper fixing disc and the lower fixing disc, and each filter element assembly comprises a separation filter element, an outer framework, a coalescence filter element and an inner framework which are sequentially connected in a sleeving mode from outside to inside so as to filter substances to be filtered; and the tank body is also provided with an inlet pipe and an outlet pipe. Coalescence separation and filtering technologies are combined, and modular design is adopted, so that the space is saved; a reverse design thought is adopted, and a technology of separating impurities first and then separating water is adopted, so that emulsified water in an oil product is effectively separated, and the water separation efficiency is improved; the technology of firstly separating impurities and then separating water can reduce the pressure of the coalescence filter element, improve the water separation efficiency and prolong the service life of the coalescence filter element.

Description

Technical Field

[0001] The utility model belongs to the technical field of coalescence filtration, and mainly relates to a multi-stage composite coalescence filter. Background Art

[0002] In the prior art, coalescing filters are mostly designed in a split body, that is, the coalescing filter element and the filtering filter element are designed independently and assembled into one volume, and water is removed first and then impurities are separated. This design structure occupies a large space, the utilization area of ​​the filter material is small, and the emulsified water in the oil is not easy to be separated. Moreover, as the use time increases, impurities settle on the surface of the filter material, which gradually reduces the water separation efficiency of the coalescing filter element. Utility Model Content

[0003] The utility model provides a multi-stage composite coalescence filter to solve the problem in the prior art that impurities settle on the surface of the filter material and the water separation efficiency of the coalescence filter element is gradually reduced.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A multi-stage composite coalescing filter, comprising:

[0006] A tank body, the upper end of which is provided with an upper head, and the lower end of the tank body is connected to a sewage pipe;

[0007] A filter element module is arranged inside the tank;

[0008] The filter element module comprises an upper fixed plate and a lower fixed plate, a plurality of filter element assemblies are arranged between the upper fixed plate and the lower fixed plate, each of the filter element assemblies comprises a separation filter element, an outer frame, a coalescing filter element and an inner frame which are sequentially sleeved from the outside to the inside, an upper end cover and a lower end cover are respectively arranged at both ends of the four, the upper end cover is arranged on the upper fixed plate, the lower end cover is arranged on the lower fixed plate, a filter channel is arranged in the inner frame, the upper end cover has a first through hole connected to the filter channel, a spacing space is arranged between the outer frame and the coalescing filter element, and the lower end cover has a second through hole connected to the spacing space;

[0009] The upper fixed plate and the lower fixed plate divide the inner part of the tank body into an upper space, a middle space and a lower space. The first through hole is connected to the upper space, the second through hole is connected to the lower space, the tank body corresponding to the middle space is connected to an inlet pipe, and the tank body corresponding to the upper space is connected to an outlet pipe.

[0010] It has the following beneficial effects: by combining coalescence separation with filtration technology and adopting modular design, space can be saved; by adopting the reverse design concept, impurities are separated first and then water is separated, which can effectively separate the emulsified water in the oil and improve the water separation efficiency; the technology of separating impurities first and then water can reduce the pressure of the coalescence filter element, improve the water separation efficiency and the service life of the coalescence filter element.

[0011] Further, the lower end cover comprises an annular member and an inner circular plate clamped in the inner ring of the annular member, the inner diameter of the annular member is larger than the outer diameter of the inner circular plate, so as to form the second through hole communicating with the interval space;

[0012] The annular member is provided with a first groove for assembling a separation filter element and an outer frame, and the inner circular plate is provided with a second groove for assembling a coalescing filter element and an inner frame.

[0013] The invention has the following beneficial effects: by arranging an inner circular plate and an annular member, the inner diameter of the annular member is larger than the outer diameter of the inner circular plate, so as to form a second through hole connected to the interval space, so that the water coalesced on the surface of the coalescing filter element in the interval space can fall from the second through hole into the lower space.

[0014] Furthermore, a plurality of the filter element assemblies are fixed between the upper fixed plate and the lower fixed plate via a pull rod.

[0015] The invention has the following beneficial effects: a plurality of filter element components are fixed between the upper fixing plate and the lower fixing plate by the pull rod, so that the plurality of components form a filter element module which is easy to replace.

[0016] Furthermore, the upper fixing plate is detachably fixed in the tank body, the lower fixing plate has flanges around its edges, and a sealing ring is provided on the outer side of the flange to achieve sealing between the lower fixing plate and the tank body.

[0017] The invention has the following beneficial effects: the filter element module is installed in a detachable and fixed manner, so that a new filter element module can be quickly replaced if it is damaged later. At the same time, flanges are provided around the edges of the lower fixed plate, and a sealing ring is provided between the flange and the tank body to achieve sealing between the lower fixed plate and the tank body.

[0018] Furthermore, the lower fixed plate is provided with positioning holes corresponding to the positions of the inner circular plates one by one, and the inner circular plate is provided with positioning posts inserted into the positioning holes.

[0019] The invention has the following beneficial effects: by setting a positioning hole on the lower fixing plate and a positioning column on the inner circular plate, the positioning column is inserted into the positioning hole, so that when the filter element assembly is subsequently installed, the installation position of the filter element assembly can be quickly and accurately located.

[0020] Furthermore, an annular sealing gasket is provided between the annular member and the lower fixed plate.

[0021] Furthermore, a water level sensor extending into the interior of the tank body is provided on the tank body corresponding to the lower space, a pneumatic drain valve is provided on the drain pipe, and an electric control component electrically connected to the water level sensor and the pneumatic drain valve is provided on the tank body.

[0022] Furthermore, a rotating arm is hinged on the tank body, and the rotating arm is connected to the upper head to realize the opening and closing of the tank body.

[0023] Furthermore, an automatic exhaust valve is provided on the upper cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a cross-sectional view of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the filter element module from the first perspective;

[0028] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0029] Figure 5 It is a structural schematic diagram of the filter element module from a second viewing angle;

[0030] Figure 6 It is a schematic diagram of the structure of the filter element assembly;

[0031] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0032] Figure 8 is a cross-sectional view of the filter element assembly;

[0033] Fig. 9 for Figure 8 A partial enlarged view of point C in the middle.

[0034] Description of reference numerals:

[0035] 1. Tank body; 2. Upper head; 3. Drain pipe; 4. Rotating arm; 5. Automatic exhaust valve; 6. Electronic control component; 7. Pneumatic drain valve; 8. Support leg; 9. Upper space; 10. Middle space; 11. Lower space; 12. Upper fixed plate; 13. Lower fixed plate; 14. Inlet pipe; 15. Outlet pipe; 16. Filter channel; 17. Interval space; 18. Water level sensor; 19. Pull rod; 20. Separation filter element; 21. Flanging; 22. Sealing ring; 23. Lower end cover; 24. Annular sealing gasket; 25. Upper end cover; 26. Positioning column; 27. Filter hole; 28. External skeleton; 29. ​​Coalescing filter element; 30. Internal skeleton; 31. Inner circular plate; 32. Ring member; 33. First through hole; 34. Claw; 35. Second through hole. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0037] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0038] like Figure 1-Figure 2 As shown, a multi-stage composite coalescing filter comprises a tank body 1, an upper head 2, a drain pipe 3 and a filter element module.

[0039] Specifically, the upper end cap 2 is installed at the upper end of the tank body 1, and the upper end cap 2 is opened and closed by a rotating arm 4. The rotating arm 4 is hinged on the tank body 1, one end of the rotating arm 4 is connected to the upper end cap 2, and the other end of the rotating arm 4 is rotated and installed on the tank body 1 around an axis extending in the up-down direction to realize the horizontal movement of the upper end cap 2 on the tank body 1. At the same time, an automatic exhaust valve 5 is provided on the upper end cap 2 to prevent excessive pressure inside the tank body 1. At the same time, four legs 8 are welded at the bottom of the tank body 1 to support the entire filter.

[0040] Specifically, the drain pipe 3 is installed at the lower end of the tank body 1, and a pneumatic drain valve 7 is provided on the drain pipe 3. The drain pipe 3 is used to discharge the water accumulated in the filter element module. At the same time, a water level sensor 18 extending into the tank body 1 is also provided at the lower end of the tank body 1. When enough water is accumulated at the lower end of the tank body 1 and reaches the detection position of the water level sensor 18, the electric control component 6 installed outside the tank body 1 will receive the signal of the water level sensor 18, thereby opening the pneumatic drain valve 7 to discharge the accumulated water through the drain pipe 3. The electric control component 6 is electrically connected to the water level sensor 18 and the pneumatic drain valve 7 to realize its reception of the signal of the water level sensor 18 and control of the pneumatic drain valve 7.

[0041] Specifically, Figure 3-Figure 5 As shown, the filter element module is arranged inside the tank body 1, and the filter element module includes an upper fixed plate 12 and a lower fixed plate 13, and a plurality of filter element assemblies are fixed between the upper fixed plate 12 and the lower fixed plate 13 by a pull rod 19. In this way, the plurality of filter element assemblies are fixed between the upper fixed plate 12 and the lower fixed plate 13 by the pull rod 19, so that the above-mentioned plurality of components form a filter element module that is easy to replace.

[0042] Specifically, Figure 6-Figure 9 As shown, each filter element assembly includes a separation filter element 20, an outer frame 28, a coalescing filter element 29 and an inner frame 30 which are sequentially connected from the outside to the inside, wherein the separation filter element 20, the outer frame 28, the coalescing filter element 29 and the inner frame 30 are all tubular, and the structures of the outer frame 28 and the inner frame 30 are the same, but the diameters are different, and a plurality of holes are provided on the outer frame 28 and the inner frame 30 to facilitate the passage of filtered water containing impurities. The separation filter element 20, the outer frame 28, the coalescing filter element 29 and the inner frame 30 which are sleeved together are provided with an upper end cover 25 at one end and a lower end cover 23 at the other end. Through the action of the pull rod 19, the upper end cover 25 is tightly attached to the upper fixed disk 12, and the lower end cover 23 is tightly attached to the lower fixed disk 13. Because the outer frame 28 is a circular tube, the space inside the inner frame 30 is defined as a filter channel 16 in the present application. At the same time, the upper end cover 25 has a first through hole 33 connected to the filter channel 16. There is an installation gap between the outer frame 28 and the coalescing filter element 29, and they are not tightly attached. In the present application, the gap between the outer frame 28 and the coalescing filter element 29 is defined as a gap space 17, and the lower end cover 23 has a second through hole 35 connected to the gap space 17.

[0043] The upper fixed plate 12 and the lower fixed plate 13 are both extended along the horizontal plane, thereby dividing the interior of the tank body 1 into an upper space 9, a middle space 10 and a lower space 11. The water level sensor 18 is installed on the tank body 1 corresponding to the lower space 11. The first through hole 33 is connected to the upper space 9, and the lower fixed plate 13 is also provided with a filter hole 27. The second through hole 35 is connected to the lower space 11 through the filter hole 27. The tank body 1 corresponding to the middle space 10 is connected with an inlet pipe 14, and the installation position of the inlet pipe 14 is close to the lower part of the tank body 1 corresponding to the middle space 10. The tank body 1 corresponding to the upper space 9 is connected with an outlet pipe 15. When filtering is required, the material to be filtered enters the middle space 10 from the inlet pipe 14, and then passes through the separation filter element 20 and the coalescing filter element 29 in turn. The water is coalesced into large water drops on the coalescing filter element 29 and falls down, and then the filtered material enters the upper space 9 and finally goes out from the outlet pipe 15. By combining coalescence separation with filtration technology and adopting modular design, space can be saved; by adopting the reverse design concept, impurities are separated first and then water is separated, which can effectively separate the emulsified water in the oil and improve the water separation efficiency; the technology of separating impurities first and then water can reduce the pressure of the coalescence filter element 29, improve the water separation efficiency and the service life of the coalescence filter element 29.

[0044] Specifically, the lower end cover 23 includes an annular member 32 and an inner circular plate 31 clamped in the inner ring of the annular member 32 by a clamping claw 34. After clamping and fixing, the inner circular plate 31 is located in the inner ring of the annular member 32. The inner diameter of the annular member 32 is larger than the outer diameter of the inner circular plate 31, that is, there is a gap between the outer circle of the annular member 32 and the outer circle of the inner circular plate 31. The gap is the second through hole 35 of the middle and lower end cover 23 connected to the spacing space 17. The annular member 32 is tightly attached to the lower fixed disk 13, and an annular sealing gasket 24 is provided between the annular member 32 and the lower fixed disk 13 to achieve sealing between the annular member 32 and the lower fixed disk 13.

[0045] Specifically, the annular member 32 is provided with a first groove, which is used to assemble the separation filter element 20 and the outer frame 28, and the inner circular plate 31 is provided with a second groove, which is used to assemble the coalescing filter element 29 and the inner frame 30. By providing the inner circular plate 31 and the annular member 32, and the inner diameter of the annular member 32 is larger than the outer diameter of the inner circular plate 31, the second through hole 35 connecting the lower end cover 23 to the partition space 17 is formed, so that the water coalesced on the surface of the coalescing filter element 29 in the partition space 17 can fall from the second through hole 35 into the lower space 11. The coalescing filter element 29 has a hydrophilic substance on the surface in the partition space 17, which can make the water coalesce into large water droplets on the surface, so that the large water droplets fall from the second through hole 35 into the lower space 11.

[0046] Specifically, the upper fixing plate 12 is detachably fixed in the tank body 1 by bolts, and the lower fixing plate 13 has flanges 21 around the edges, and a sealing ring 22 is provided outside the flanges 21, and the flanges 21 are closely attached to the inner wall of the tank body 1 to achieve a seal between the lower fixing plate 13 and the tank body 1. The filter element module is installed in a detachable and fixed manner, so that a new filter element module can be quickly replaced after it is damaged later. At the same time, the lower fixing plate 13 has flanges 21 around the edges, and a sealing ring 22 is provided between the flanges 21 and the tank body 1 to achieve a seal between the lower fixing plate 13 and the tank body 1.

[0047] Specifically, the lower fixing plate 13 is provided with positioning holes corresponding to the positions of the inner circular plate 31, and the inner circular plate 31 is provided with positioning posts 26 inserted into the positioning holes. By providing positioning holes on the lower fixing plate 13 and providing positioning posts 26 on the inner circular plate 31, the positioning posts 26 are inserted into the positioning holes, so that when the filter element assembly is subsequently installed, the installation position of the filter element assembly can be quickly and accurately located.

[0048] The working process of this utility model is as follows:

[0049] The oil to be filtered enters the middle space 10 from the inlet pipe 14 , is filtered by a plurality of filter element assemblies, and thus obtains the oil without water, and then enters the upper space 9 , and finally exits from the outlet pipe 15 .

[0050] The filter element assembly filters the oil containing water, which will first be filtered by the separation filter element 20 to remove impurities in the oil. The oil with impurities removed will then be filtered by the coalescing filter element 29 to remove water in the oil. Because the surface of the coalescing filter element 29 in the interval space 17 contains hydrophilic substances, the water will coalesce into large water droplets on the surface of the coalescing filter element 29 in the interval space 17. The large water droplets then fall and pass through the second through hole 35 and the filter hole 27 in turn into the lower space 11. The lower space 11 is a space for gathering water. When the water gathered in the lower space 11 reaches the detection position of the water level sensor 18, the water level sensor 18 will transmit a signal to the electronic control component 6, and the electronic control component 6 will open the pneumatic drain valve 7 to discharge the coalesced water through the drain pipe 3.

Claims

1. A multi-stage composite coalescing filter, characterized in that: include: A tank body (1) having an upper end cap (2) at its upper end, and a sewage discharge pipe (3) connected to the lower end of the tank body (1); A filter element module is arranged inside the tank body (1); The filter element module comprises an upper fixed plate (12) and a lower fixed plate (13), a plurality of filter element assemblies are arranged between the upper fixed plate (12) and the lower fixed plate (13), each of the filter element assemblies comprises a separation filter element (20), an outer frame (28), a coalescing filter element (29) and an inner frame (30) which are sequentially sleeved from the outside to the inside, an upper end cover (25) and a lower end cover (23) are respectively arranged at the two ends of the four, the upper end cover (25) is arranged on the upper fixed plate (12), the lower end cover (23) is arranged on the lower fixed plate (13), a filter channel (16) is arranged in the inner frame (30), the upper end cover (25) has a first through hole (33) connected to the filter channel (16), a spacing space (17) is arranged between the outer frame (28) and the coalescing filter element (29), and the lower end cover (23) has a second through hole (35) connected to the spacing space (17); The upper fixed plate (12) and the lower fixed plate (13) divide the interior of the tank body (1) into an upper space (9), a middle space (10) and a lower space (11); the first through hole (33) is connected to the upper space (9); the second through hole (35) is connected to the lower space (11); the tank body (1) corresponding to the middle space (10) is connected to an inlet pipe (14); the tank body (1) corresponding to the upper space (9) is connected to an outlet pipe (15).

2. A multi-stage composite coalescing filter according to claim 1, characterized in that: The lower end cover (23) comprises an annular member (32) and an inner circular plate (31) clamped in the inner ring of the annular member (32); the inner diameter of the annular member (32) is greater than the outer diameter of the inner circular plate (31) so as to form the second through hole (35) communicating with the partition space (17); The annular member (32) is provided with a first groove for assembling a separation filter element (20) and an outer frame (28), and the inner circular plate (31) is provided with a second groove for assembling a coalescing filter element (29) and an inner frame (30).

3. A multi-stage composite coalescing filter according to claim 2, characterized in that: A plurality of filter element assemblies are fixed between the upper fixed plate (12) and the lower fixed plate (13) via a pull rod (19).

4. A multi-stage composite coalescing filter according to claim 3, characterized in that: The upper fixing plate (12) is detachably fixed in the tank body (1), and the lower fixing plate (13) has flanges (21) around its edges. A sealing ring (22) is provided on the outer side of the flange (21) to achieve sealing between the lower fixing plate (13) and the tank body (1).

5. A multi-stage composite coalescing filter according to claim 4, characterized in that: The lower fixed plate (13) is provided with positioning holes corresponding to the positions of the inner circular plate (31) one by one, and the inner circular plate (31) is provided with positioning columns (26) inserted into the positioning holes.

6. A multi-stage composite coalescing filter according to claim 5, characterized in that: An annular sealing gasket (24) is provided between the annular member (32) and the lower fixed plate (13).

7. A multi-stage composite coalescing filter according to any one of claims 1 to 6, characterized in that: The tank body (1) corresponding to the lower space (11) is provided with a water level sensor (18) extending into the interior of the tank body (1), the sewage pipe (3) is provided with a pneumatic sewage valve (7), and the tank body (1) is provided with an electric control component (6) electrically connected to the water level sensor (18) and the pneumatic sewage valve (7), respectively.

8. A multi-stage composite coalescing filter according to any one of claims 1 to 6, characterized in that: A rotating arm (4) is hinged on the tank body (1), and the rotating arm (4) is connected to the upper sealing head (2) to realize the opening and closing of the tank body (1).

9. A multi-stage composite coalescing filter according to any one of claims 1 to 6, characterized in that: The upper sealing head (2) is provided with an automatic exhaust valve (5).

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