Sleeve type multi-stage high-precision filter

Abstract

The utility model relates to the field of filtration, in particular to a sleeve type multi-stage high-precision filter which comprises a tank body with a hollow structure inside; the filter element is of a cylindrical structure, the filter element is installed in the tank body, and an overflowing gap exists between the filter element and the tank body; the central supporting pipe is arranged in the filter element, the interior of the central supporting pipe is hollow, at least the top end of the central supporting pipe is open, and dense filter holes are formed in the central supporting pipe; the liquid injection pipe is formed on the side wall of the tank body and is communicated with the top end of the central supporting pipe; the liquid discharging pipe is formed on the side wall of the tank body and communicated with the interior of the tank body, and the liquid discharging pipe is arranged to be lower than the liquid injection pipe. By means of the multi-stage filtering mode, the filtering effect is improved, the service life is prolonged, the consumption of filter elements in the whole year is reduced, the replacement frequency is reduced, and the oil filtering cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of filtration, and in particular to a sleeve-type multi-stage high-precision filter. Background Art

[0002] During the operation of the hydraulic system, impurities such as metal chips, dust, oxidized carbon deposits and colloidal sediments will continuously mix into the lubricating oil, affecting the working performance of the hydraulic system. Therefore, the lubricating oil needs to be filtered regularly to ensure the normal operation of the oil system.

[0003] Existing filter references Figure 1 As shown, it mainly includes a tank body 1, a filter element 4 installed in the tank body 1, an injection pipe 2 fixed at one end of the tank body 1 and connected to the inside of the filter element 4, and a discharge pipe 3 connected to one side of the tank body 1 and connected to the inside of the tank body 1. When working, the lubricating oil is injected through the injection pipe 2, filtered by the filter element 4, and discharged from the discharge pipe 3.

[0004] After being used for a period of time, the above-mentioned filter is prone to have impurities attached to the surface of the filter element 4, and some particles and sediments may clog the filter element 4, resulting in reduced filtering effect, requiring frequent replacement, and a shorter overall service life. Utility Model Content

[0005] The present application provides a sleeve-type multi-stage high-precision filter, which improves the filtering effect and service life through multi-stage filtration, reduces the consumption of filter elements throughout the year, reduces the replacement frequency, and reduces the oil filtering cost.

[0006] A sleeve-type multi-stage high-precision filter, comprising:

[0007] The tank body has a hollow structure inside;

[0008] The filter element is in a cylindrical structure, the filter element is installed in the tank body, and there is a flow gap between the filter element and the tank body;

[0009] A central support tube is disposed in the filter element, the interior of the central support tube is hollow and at least the top end is open, and dense filter holes are processed on the central support tube;

[0010] A liquid injection pipe, formed on the side wall of the tank body and connected to the top end of the central support pipe;

[0011] A liquid discharge pipe is formed on the side wall of the tank body and communicated with the interior of the tank body. The liquid discharge pipe is arranged lower than the liquid injection pipe.

[0012] By adopting the above technical solution, during operation, the lubricating oil carrying impurities is injected into the central support tube through the injection tube. The central support tube can intercept larger particles and sediments, reduce the possibility of clogging the filter element, and play the role of primary filtration. The filtered oil gradually passes through the filter element to achieve secondary filtration and is finally discharged through the drain pipe. In the process of removing the central support tube from the filter element, the filter holes can also scrape off the adsorbents on the surface of the filter element, thereby increasing the service life of the filter element.

[0013] Preferably, the tank body comprises an outer shell which is hollow inside and open at one end, and a top cover connected to the outer shell by bolts;

[0014] The injection tube is formed on the outer shell and communicated with the top end of the central support tube;

[0015] The liquid discharge pipe is formed on the shell and communicated with the interior of the shell.

[0016] By adopting the above technical solution, the filter element can be cleaned or replaced as needed.

[0017] Preferably, it further comprises a sleeve which is hollow inside and open at one end, a flow gap is provided between the sleeve and the housing, a mounting ring is fixedly connected to the outer wall of the sleeve, the mounting ring separates the sleeve into an upper cylinder and a lower cylinder, and a side wall of the lower cylinder is processed with dense flow holes;

[0018] A supporting ring is fixedly connected to the inner wall of the shell, and the supporting ring divides the shell into an upper shell and a lower shell. When the mounting ring abuts against the supporting ring, the upper shell, the mounting ring, the upper cylinder and the top cover are enclosed to form an upper chamber, and the lower shell, the supporting ring and the lower cylinder are enclosed to form a lower chamber.

[0019] The injection tube is formed on the upper shell and communicates with the top end of the central support tube through the upper chamber;

[0020] The liquid discharge pipe is formed on the lower shell and communicated with the lower chamber.

[0021] By adopting the above technical solution, during operation, the lubricating oil carrying impurities is injected into the upper chamber through the injection pipe, and buffering is achieved in the upper chamber. As the oil is continuously injected, the liquid level slowly rises. During this process, part of the larger particles and sediments carried in the oil will settle into the storage space at the mounting ring, forming a primary filtration. After the oil overflows the central support tube, it flows downstream along the central support tube, and the central support tube performs a secondary filtration on the impurities. The filtered oil gradually passes through the filter element and the sleeve into the lower chamber. During this process, the filter element performs a tertiary filtration, and finally the oil is discharged through the drain pipe.

[0022] Preferably, it also includes a base and a top seat for limiting the filter element, the base is arranged at the bottom of the filter element, and the top seat is arranged at the top of the filter element.

[0023] The above technical solution is mainly used to limit and fix the filter element.

[0024] Preferably, the base includes a bottom plate, an inner ring plate fixedly connected to the bottom plate, and an outer ring plate fixedly connected to the bottom plate, and a limiting groove is formed between the inner ring plate and the outer ring plate.

[0025] By adopting the above technical solution, during installation, one end of the filter element is placed in the limiting groove of the base, and the inner ring plate and the outer ring plate limit the filter element.

[0026] Preferably, the top seat includes a top plate, an inner limit ring fixed to the top plate, and an outer limit ring fixed to the top plate, a limit groove is formed between the inner limit ring and the outer limit ring, and a through hole for installing the center support tube is processed at the center of the top plate.

[0027] By adopting the above technical solution, during installation, the other end of the filter element is installed in the limiting groove of the top seat, and the inner limiting ring and the outer limiting ring limit the filter element.

[0028] Preferably, a support plate is fixedly connected to the outer wall of the central support tube near the top end, and the support plate is placed on the top seat;

[0029] It also includes an elastic member, one end of which abuts against the top cover, and the other end of which abuts against the support plate.

[0030] By adopting the above technical solution, the elastic member is always in a compressed state, and the mounting ring is pressed tightly against the supporting ring, so that the upper chamber and the lower chamber are completely separated, thereby preventing the oil before and after filtration from mixing with each other and causing re-contamination.

[0031] Preferably, the elastic member is a compression spring.

[0032] Preferably, a handle is fixedly connected to the support plate, and the handle is lower than the opening end of the shell.

[0033] By adopting the above technical solution, it is convenient for staff to operate.

[0034] Preferably, a bearing plate is fixedly connected to the outer wall of the sleeve near the opening end, and sealing rings are provided between the bearing plate and the support plate, between the mounting ring and the supporting ring, and between the base and the bottom wall of the sleeve.

[0035] The above technical solution is mainly used to improve the overall sealing performance.

[0036] In summary, the present application includes the following beneficial technical effects: the filter in the present application greatly increases the filtration area by modifying the internal structure of the existing stainless steel filter of the filling line, improves the filtration effect and service life through multi-stage filtration, reduces the annual consumption of the filter element, reduces the replacement frequency, reduces the cost of oil filtration, reduces labor intensity, and reduces the transportation process of oily waste. And because the filtration area is increased, the pressure drop of the clean filter element can be reduced, so that the filling pump can run at low pressure for a longer time, with lower power consumption, improve the filling efficiency, and make the system operation more energy-saving, which meets the energy-saving and environmental protection operation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the prior art structure in the background technology of this application;

[0038] Figure 2 is a perspective view of the filter in this application;

[0039] Figure 3 It is an exploded schematic diagram showing the installation relationship of various components in the filter;

[0040] Figure 4 It is a cross-sectional view showing the internal structure of the filter and the direction of liquid flow;

[0041] Figure 5 It is a structural diagram showing the base;

[0042] Figure 6 It is a structural schematic diagram reflecting the top seat;

[0043] Figure 7 It is a schematic diagram showing the structure of the sleeve.

[0044] Explanation of the accompanying drawings: 1. tank body; 11. outer shell; 12. top cover; 13. supporting ring; 14. upper shell; 15. lower shell; 2. filling pipe; 3. drainage pipe; 4. filter element; 5. base; 51. bottom plate; 52. inner ring plate; 53. outer ring plate; 6. top seat; 61. top plate; 62. inner limit ring; 63. outer limit ring; 64. through hole; 7. center support tube; 71. filter hole; 72. support plate; 73. handle; 8. sleeve; 81. bearing plate; 82. mounting ring; 83. upper cylinder; 84. lower cylinder; 85. flow hole; 9. elastic member; 10. upper chamber; 20. lower chamber. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-3 This application is described in further detail.

[0046] The embodiment of the present application discloses a sleeve-type multi-stage high-precision filter. Figure 2 and Figure 3The filter includes a tank body 1, a liquid injection pipe 2, a liquid discharge pipe 3, a filter element 4, a base 5, a top seat 6, a central support pipe 7, a sleeve 8 and an elastic member 9.

[0047] The tank body 1 includes a shell 11 which is hollow inside and opened at one end, and a top cover 12, and the top cover 12 is detachably fixedly connected to the shell 11 by bolts. The injection pipe 2 and the discharge pipe 3 are both connected to the inside of the shell 11. More specifically, the injection pipe 2 is formed on one side of the shell 11 and at an upper position, and the discharge pipe 3 is formed on the side of the shell 11 opposite to the injection pipe 2 and at a lower position.

[0048] Reference Figure 3 and Figure 4 The filter element 4 is a cylindrical structure, which is hollow inside and open at both ends. It can be set to one layer, two layers or multiple layers as needed. In this embodiment, two layers are used as an example for illustration. The base 5 is set at the bottom of the filter element 4, and the top seat 6 is set at the top of the filter element 4, which is mainly used to limit and fix the filter element 4.

[0049] Reference Figure 4 and Figure 5 The base 5 includes a bottom plate 51, an inner ring plate 52 fixed to the bottom plate 51, and an outer ring plate 53 fixed to the edge of the bottom plate 51. A limiting groove is formed between the inner ring plate 52 and the outer ring plate 53. When installing, one end of the filter element 4 is placed in the limiting groove of the base 5, and the inner ring plate 52 and the outer ring plate 53 limit the filter element 4. Figure 4 and Figure 6 The top seat 6 includes a top plate 61, an inner limiting ring 62 fixed to the top plate 61, and an outer limiting ring 63 fixed to the edge of the top plate 61. A through hole 64 coaxially arranged with the filter element 4 is processed at the center of the top plate 61, and a limiting groove is also formed between the inner limiting ring 62 and the outer limiting ring 63. During installation, the other end of the filter element 4 is installed in the limiting groove of the top seat 6, and the inner limiting ring 62 and the outer limiting ring 63 limit the filter element 4.

[0050] Reference Figure 3 and Figure 4 The center support tube 7 is hollow inside and open at both ends. It is installed in the filter element 4 through the through hole 64 on the top plate 61. The center support tube 7 is processed with dense filter holes 71, which mainly filter larger particles, sediments and other impurities. In the process of removing the center support tube 7 from the filter element 4, the filter holes 71 can also scrape off the adsorbed materials on the surface of the filter element 4, thereby increasing the service life of the filter element 4. A support plate 72 is fixedly connected to the outer wall of the center support tube 7 near the top, and there is a gap between the support plate 72 and the outer shell 11. When the center support tube 7 is installed in the filter element 4, the support plate 72 is placed on the top seat 6. In order to facilitate operation, a pair of handles 73 are fixedly connected to the support plate 72, and the handles 73 are lower than the open end of the outer shell 11.

[0051] Reference Figure 4 and Figure 7 The sleeve 8 is sleeved on the outside of the filter element 4, and cooperates with the central support tube 7 to clamp the filter element 4 in the middle, thereby playing a protective role and preventing the filter element 4 from deformation. The interior of the sleeve 8 is hollow and one end is open. A bearing plate 81 is fixedly connected to the outer wall of the sleeve 8 near the open end, and a gap is provided between the bearing plate 81 and the outer shell 11. A mounting ring 82 is fixedly connected to the outer wall of the sleeve 8 near the middle, and the mounting ring 82 separates the sleeve 8 into an upper cylinder 83 and a lower cylinder 84. The side wall of the lower cylinder 84 is processed with dense flow holes 85; a supporting ring 13 is fixedly connected to the inner wall of the outer shell 11, and the supporting ring 13 separates the outer shell 11 into an upper shell 14 and a lower shell 15; during installation, the sleeve 8 is placed in the outer shell 11 so that the mounting ring 82 abuts against the supporting ring 13. At this time, the upper shell 14, the mounting ring 82, the upper cylinder 83 and the cover plate enclose an upper chamber 10; the lower shell 15, the supporting ring 13 and the lower cylinder 84 enclose a lower chamber 20. It should be noted that the injection pipe 2 is communicated with the upper chamber 10 , and the discharge pipe 3 is communicated with the lower chamber 20 .

[0052] The elastic member 9 is a compression spring, which can be a single spring or a composite spring composed of multiple single springs of different lengths. The elastic member 9 is installed in the tank body 1, specifically with one end against the top cover 12 and the other end against the support plate 72. It is always in a compressed state, so that the support plate 72 is pressed tightly against the bearing plate 81, and the mounting ring 82 is pressed tightly against the supporting ring 13, completely separating the upper chamber 10 and the lower chamber 20 to prevent the oil before and after filtration from mixing with each other and causing re-contamination.

[0053] In order to further improve the overall sealing performance, sealing rings are provided between the bearing plate 81 and the support plate 72 , between the mounting ring 82 and the supporting ring 13 , and between the base 5 and the bottom wall of the sleeve 8 .

[0054] The implementation principle of the embodiment of the present application is as follows: during operation, the lubricating oil carrying impurities is injected into the upper chamber 10 through the injection pipe 2, and buffering is achieved in the upper chamber 10. As the oil is continuously injected, the liquid level slowly rises. During this process, part of the larger particles and sediments carried in the oil will be deposited in the storage space at the mounting ring 82, forming a primary filtration. When the oil reaches the support plate 72, since the gap between the support plate 72 and the outer shell 11 is much smaller than the gap between the sleeve 8 and the outer shell 11, an interception, i.e., a secondary filtration, will be formed at the support plate 72 to intercept the impurities floating in the oil. After the oil overflows the support plate 72, it flows downstream along the central support pipe 7. The central support pipe 7 performs a third-stage filtration on the impurities. The filtered oil gradually passes through the filter element 4 and the sleeve 8 into the lower chamber 20. During this process, the filter element 4 performs a fourth-stage filtration, and finally the oil is discharged through the drain pipe 3.

[0055] The filter in the present application is modified by modifying the internal structure of the existing stainless steel filter of the filling line, which greatly increases the filtering area. Through multi-stage filtering, the filtering effect and service life are improved, the annual consumption of the filter element 4 is reduced, the replacement frequency is reduced, the oil filtering cost is reduced, the labor intensity is reduced, and the transportation process of oily waste is reduced. In addition, due to the increase in the filtering area, the pressure drop of the clean filter element 4 can be reduced, so that the low-pressure operation time of the filling pump is longer, the power consumption is lower, the filling efficiency is improved, and the system operation is more energy-saving, which meets the energy-saving and environmental protection operation requirements.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sleeve-type multi-stage high-precision filter, characterized in that: include: The tank body (1) has a hollow structure inside; The filter element (4) is in a cylindrical structure, the filter element (4) is installed in the tank body (1), and there is a flow gap between the filter element (4) and the tank body (1); A central support tube (7) is arranged in the filter element (4); the interior of the central support tube (7) is hollow and at least the top end is open; and dense filter holes (71) are processed on the central support tube (7); A liquid injection pipe (2) formed on the side wall of the tank body (1) and connected to the top end of the central support pipe (7); A liquid discharge pipe (3) is formed on the side wall of the tank body (1) and is in communication with the interior of the tank body (1); the liquid discharge pipe (3) is arranged lower than the liquid injection pipe (2).

2. A sleeve-type multi-stage high-precision filter according to claim 1, characterized in that: The tank body (1) comprises an outer shell (11) which is hollow inside and open at one end, and a top cover (12) connected to the outer shell (11) by bolts; The liquid injection pipe (2) is formed on the outer shell (11) and is connected to the top end of the central support pipe (7); The liquid discharge pipe (3) is formed on the outer shell (11) and is communicated with the interior of the outer shell (11).

3. A sleeve-type multi-stage high-precision filter according to claim 2, characterized in that: It also comprises a sleeve (8) which is hollow inside and open at one end, a flow gap being provided between the sleeve (8) and the housing (11), a mounting ring (82) being fixedly connected to the outer wall of the sleeve (8), the mounting ring (82) dividing the sleeve (8) into an upper cylinder (83) and a lower cylinder (84), and a side wall of the lower cylinder (84) being processed with dense flow holes (85); A supporting ring (13) is fixedly connected to the inner wall of the outer shell (11), and the supporting ring (13) divides the outer shell (11) into an upper shell (14) and a lower shell (15). When the mounting ring (82) abuts against the supporting ring (13), the upper shell (14), the mounting ring (82), the upper cylinder (83) and the top cover (12) enclose an upper chamber (10), and the lower shell (15), the supporting ring (13) and the lower cylinder (84) enclose a lower chamber (20); The liquid injection tube (2) is formed on the upper shell (14) and is connected to the top end of the central support tube (7) through the upper chamber (10); The liquid discharge pipe (3) is formed on the lower shell (15) and is connected to the lower chamber (20).

4. A sleeve-type multi-stage high-precision filter according to claim 3, characterized in that: It also comprises a base (5) and a top seat (6) for limiting the position of the filter element (4); the base (5) is arranged at the bottom of the filter element (4), and the top seat (6) is arranged at the top of the filter element (4).

5. A sleeve-type multi-stage high-precision filter according to claim 4, characterized in that: The base (5) comprises a bottom plate (51), an inner ring plate (52) fixedly connected to the bottom plate (51), and an outer ring plate (53) fixedly connected to the bottom plate (51), and a limiting groove is formed between the inner ring plate (52) and the outer ring plate (53).

6. A sleeve-type multi-stage high-precision filter according to claim 4, characterized in that: The top seat (6) comprises a top plate (61), an inner limiting ring (62) fixedly connected to the top plate (61), and an outer limiting ring (63) fixedly connected to the top plate (61), a limiting groove is formed between the inner limiting ring (62) and the outer limiting ring (63), and a through hole (64) for installing a central support tube (7) is processed at the center of the top plate (61).

7. A sleeve-type multi-stage high-precision filter according to claim 4, characterized in that: A support plate (72) is fixedly connected to the outer wall of the central support tube (7) near the top end, and the support plate (72) is placed on the top seat (6); It also comprises an elastic member (9), one end of the elastic member (9) abuts against the top cover (12), and the other end of the elastic member (9) abuts against the support plate (72).

8. A sleeve-type multi-stage high-precision filter according to claim 7, characterized in that: The elastic member (9) is a compression spring.

9. A sleeve-type multi-stage high-precision filter according to claim 7, characterized in that: A handle (73) is fixedly connected to the support plate (72), and the handle (73) is lower than the opening end of the housing (11).

10. A sleeve-type multi-stage high-precision filter according to claim 7, characterized in that: A bearing plate (81) is fixedly connected to the outer wall of the sleeve (8) near the open end, and sealing rings are provided between the bearing plate (81) and the support plate (72), between the mounting ring (82) and the supporting ring (13), and between the base (5) and the bottom wall of the sleeve (8).

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