Filter with replaceable filter element unit

Abstract

The utility model discloses a filter with a replaceable filter element unit, and relates to the technical field of filters, the filter with the replaceable filter element unit comprises an outer shell, a lower end cover fixed at one end of the outer shell and a limiting frame, the limiting frame is fixed at one end, far away from the lower end cover, in the outer shell, and a step groove is formed in the limiting frame; and the filter element assembly is movably installed in the outer shell, and the upper end of the filter element assembly is in lap joint with the interior of the step groove. The upper end cover is separated from the outer shell, at the moment, the pressing plate is separated from the upper end of the filter element assembly, release of the upper end of the filter element assembly is achieved, the bottom support pushes the filter element assembly to move upwards through contraction of the elastic piece, then the filter element assembly extends out of the upper end of the outer shell, and therefore the filter element assembly can be rapidly replaced conveniently. Only the upper end cover needs to be detached, calibration operation is not needed, and the replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter with a replaceable filter element unit. Background Art

[0002] The filter is an indispensable device on the pipeline that conveys the medium. It is usually installed on the pressure reducing valve, pressure relief valve, and water level valve to facilitate the inlet end equipment of the filter and other equipment. After the water to be treated passes through the filter cartridge of the filter screen, its impurities are blocked. When cleaning is required, just take out the detachable filter cartridge, treat it and reinstall it. Therefore, it is extremely convenient to use and maintain.

[0003] The Chinese utility model patent with publication number CN210229285U discloses a filter that is easy to replace the filter element. In this utility model, the filter element and the filter cover are finally fixed by positioning grooves, positioning blocks, fixing rings and reset springs. Compared with the prior art in which the filter element is fixed at multiple points by bolts, it has the advantage of convenient disassembly and assembly, so that users can regularly disassemble and clean the filter element and replace it in time.

[0004] When removing the filter element of the above structure, the filter element needs to be slightly pressed into the filter cover, and then the filter element is rotated to align the positioning block with the positioning groove, and then the filter element is pulled out. In this process, the positioning block needs to be aligned with the positioning groove, and the alignment process takes a certain amount of time, which is not conducive to the replacement of the filter element. Utility Model Content

[0005] The utility model provides a filter with a replaceable filter element unit to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filter with a replaceable filter element unit, comprising an outer shell, a lower end cover fixed to one end of the outer shell, and a limit frame, the limit frame is fixed to one end of the outer shell away from the lower end cover, and a step groove is provided in the limit frame; a filter element assembly, the filter element assembly is movably installed in the outer shell, and the upper end of the filter element assembly is overlapped inside the step groove; a bottom bracket, the bottom bracket is installed in the outer shell at one end close to the lower end cover, and the bottom bracket slides along the axial direction of the outer shell, and a magnet that is magnetically attracted to the bottom of the filter element assembly is fixed in the middle of the upper surface of the bottom bracket; an upper end cover, the upper end cover is threadedly connected to the other end of the outer shell, and an input pipe is installed in the middle of the upper end cover, the other end of the input pipe extends into the filter element assembly, and a pressure plate is slidably installed on the outside of the input pipe, and a pressure spring is installed on the outside of the input pipe between the pressure plate and the upper end cover, and the elastic force of the pressure spring causes the pressure plate to slide along the axial direction of the input pipe, and causes the pressure plate to be inserted into the step groove and abut against the upper end of the filter element assembly.

[0007] As a preferred technical solution of the utility model, the filter element assembly includes an inner sleeve installed in an outer shell, the inner sleeve is made of stainless steel, and a filter element body is installed in the inner sleeve, the upper end of the filter element body passes through the inner sleeve and is provided with a threaded opening, a connecting ring is threadedly connected to the outer side of the threaded opening, and the lower surface of the connecting ring is against the bottom of the step groove.

[0008] As a preferred technical solution of the utility model, a cavity is axially arranged in the filter element body, the lower end of the input pipe extends into the cavity and is installed with a filter plate, and the outer diameter of the filter plate is larger than the outer diameter of the input pipe.

[0009] As a preferred technical solution of the utility model, an elastic part is symmetrically fixed to the bottom of the limit frame, and the lower end of the elastic part is fixedly connected to the bottom bracket; the elastic part includes a sleeve fixed to the lower surface of the limit frame, and a telescopic rod is axially slidably installed in the sleeve, one end of the telescopic rod is fixedly connected to the bottom bracket, and the other end of the telescopic rod is inserted into the sleeve and is installed with a telescopic spring, and the other end of the telescopic spring is fixedly connected to the top inside the sleeve.

[0010] As a preferred technical solution of the utility model, the outer diameter of the pressure plate is larger than the outer diameter of the filter element body, and the outer diameter of the pressure plate is smaller than the outer diameter of the connecting ring.

[0011] As a preferred technical solution of the utility model, the upper surface of the upper end cover is provided with a medium inlet connected to the input pipe, the lower surface of the lower end cover is fixed with a mounting column, and the other end of the mounting column is fixed with a connecting flange.

[0012] Compared with the prior art, the utility model provides a filter with a replaceable filter element unit, which has the following beneficial effects:

[0013] 1. The filter of the replaceable filter element unit is fixed at the lower end of the filter element assembly by the magnetic attraction between the magnet and the inner liner, and the pressure plate is pushed by the pressure spring so that the pressure plate and the upper end of the filter element assembly are abutted against each other, so that the filter element assembly is tightly connected with the limit frame, thereby fixing the filter element assembly.

[0014] 2. The filter of the replaceable filter element unit is realized by separating the upper end cover from the outer shell. At this time, the pressure plate is separated from the upper end of the filter element assembly to release the upper end of the filter element assembly. The bottom bracket pushes the filter element assembly upward through the contraction of the elastic member, and then the filter element assembly extends from the upper end of the outer shell, thereby facilitating the rapid replacement of the filter element assembly. Only the upper end cover needs to be removed, and no calibration operation is required, thereby improving the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 For the utility model Figure 2 The main view;

[0018] Figure 4 It is an exploded view of the utility model;

[0019] Figure 5 This is a schematic diagram of the installation structure of the elastic member in the utility model;

[0020] Figure 6 It is a schematic diagram of the internal structure of the elastic member in the utility model;

[0021] Figure 7 It is a schematic diagram of the installation structure of the medium pressure plate of the utility model.

[0022] In the figure: 1. outer shell; 2. lower end cover; 3. mounting column; 4. upper end cover; 5. medium inlet; 6. limit frame; 7. input pipe; 8. inner sleeve; 9. filter element body; 10. connecting ring; 11. pressure plate; 12. pressure spring; 13. filter plate; 14. elastic member; 141. sleeve; 142. telescopic spring; 143. telescopic rod; 15. bottom bracket; 16. magnet. DETAILED DESCRIPTION

[0023] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 7 The utility model discloses a filter with a replaceable filter element unit, comprising an outer shell 1, a lower end cover 2 fixed to one end of the outer shell 1, preferably the lower end cover 2 and the outer shell 1 are welded and fixed, and also comprises a limit frame 6, the limit frame 6 is fixed in the outer shell 1 and away from one end of the lower end cover 2, and a step groove is opened in the limit frame 6, and a sealing ring is preferably provided on the inner wall of the step groove to improve the relative sealing effect of the equipment.

[0025] The present embodiment also includes a filter element assembly, which is movably installed in the outer shell 1, and the upper end of the filter element assembly is overlapped with the inside of the step groove, which is convenient for quick loading and unloading of the filter element assembly.

[0026] In order to fix the filter element assembly, the filter of the replaceable filter element unit provided in this embodiment also includes a bottom bracket 15. The bottom bracket 15 is installed at one end of the outer shell 1 close to the lower end cover 2, and the bottom bracket 15 slides axially along the outer shell 1. A magnet 16 that is magnetically attracted to the bottom of the filter element assembly is fixed in the middle of the upper surface of the bottom bracket 15. The lower end of the filter element assembly is fixed by the magnetic attraction between the magnet 16 and the bottom of the filter element assembly.

[0027] In order to achieve the fixation of the upper end of the filter element assembly, the present embodiment also includes an upper end cover 4, which is threadedly connected to the other end of the outer shell 1, and an input pipe 7 is installed in the middle part of the upper end cover 4, the other end of the input pipe 7 extends into the filter element assembly, and a pressure plate 11 is slidably installed on the outside of the input pipe 7, and a pressure spring 12 is installed on the outside of the input pipe 7 between the pressure plate 11 and the upper end cover 4. The elastic force of the pressure spring 12 causes the pressure plate 11 to slide axially along the input pipe 7, and causes the pressure plate 11 to be inserted into the step groove and abut against the upper end of the filter element assembly. The pressure plate 11 is pushed by the pressure spring 12 so that the pressure plate 11 abuts against the upper end of the filter element assembly, thereby making the filter element assembly tightly connected to the limit frame 6, thereby achieving the fixation of the upper end of the filter element assembly.

[0028] like Figure 2-Figure 4 As shown, the above-mentioned filter element assembly includes an inner sleeve 8 installed in the outer shell 1, and the inner sleeve 8 is made of stainless steel so that the inner sleeve 8 and the magnet 16 are attracted to each other to achieve the fixation of the lower end of the filter element assembly, and a filter element body 9 is installed in the inner sleeve 8. The upper end of the filter element body 9 passes through the inner sleeve 8 and is provided with a threaded mouth. The outer side of the threaded mouth is threadedly connected with a connecting ring 10, and the lower surface of the connecting ring 10 is abutted against the bottom of the step groove to fix the filter element assembly on the limiting frame 6.

[0029] like Figure 2 and Figure 3 As shown, in order to facilitate the filtering of the medium, a cavity is axially arranged in the filter element body 9, the lower end of the input pipe 7 extends into the cavity and a filter plate 13 is installed, the outer diameter of the filter plate 13 is larger than the outer diameter of the input pipe 7, the filter plate 13 can realize the preliminary filtration of the medium, and can prevent the pressure plate 11 from detaching from the lower end of the input pipe 7.

[0030] like Figure 2-Figure 6 As shown, in order to facilitate the disassembly of the filter element assembly, an elastic member 14 is symmetrically fixed at the bottom of the limiting frame 6 , and the lower end of the elastic member 14 is fixedly connected to the bottom bracket 15 . The elastic member 14 is used to adjust the position of the bottom bracket 15 .

[0031] Furthermore, the elastic member 14 includes a sleeve 141 fixed to the lower surface of the limit frame 6, and a telescopic rod 143 is axially slidably installed in the sleeve 141. One end of the telescopic rod 143 is fixedly connected to the bottom bracket 15, and the other end of the telescopic rod 143 is inserted into the sleeve 141 and is installed with a telescopic spring 142. The other end of the telescopic spring 142 is fixedly connected to the top of the sleeve 141. Preferably, the contraction force of the telescopic spring 142 is much smaller than the relaxation force of the pressure spring 12 to ensure that after the upper end cover 4 is installed, the connecting ring 10 is always against the limit frame 6, thereby improving the stability during filtration.

[0032] like Figure 2 and Figure 3 As shown, the outer diameter of the pressing plate 11 is larger than the outer diameter of the filter element body 9 , and the outer diameter of the pressing plate 11 is smaller than the outer diameter of the connecting ring 10 , so as to ensure that the pressing plate 11 presses against the filter element body 9 , so that the filter element body 9 is fixed on the limiting frame 6 .

[0033] like Figure 1-Figure 3 As shown, a medium inlet 5 connected to an input pipe 7 is provided on the upper surface of the upper end cover 4, a mounting column 3 is fixed on the lower surface of the lower end cover 2, and a connecting flange is fixed on the other end of the mounting column 3 to facilitate installation of the utility model when in use.

[0034] The working principle and use process of the utility model are as follows: when replacing the filter element, the upper end cover 4 is first separated from the outer shell 1. After the separation, the pressure plate 11 is removed from the inside of the step groove, so that the connecting ring 10 is separated from the pressure plate 11, and the telescopic spring 142 is contracted to make the telescopic rod 143 retract into the inside of the sleeve 141. At this time, the bottom bracket 15 moves upward with the telescopic rod 143, and then pushes the filter element assembly upward, which is convenient for the removal of the filter element assembly. When installing, the filter element assembly is inserted into the outer shell 1 from the step groove axially along the outer shell 1. At this time, the bottom of the filter element assembly is attracted by the magnet 16 to achieve the fixation of the lower end of the filter element assembly, and the upper end cover 4 is installed on the upper end of the outer shell 1. The elastic force of the pressure spring 12 makes the pressure plate 11 slide axially along the input pipe 7 and insert the pressure plate 11 into the step groove. The pressure spring 12 pushes the pressure plate 11 so that the pressure plate 11 is against the upper end of the connecting ring 10, so that the filter element assembly is tightly connected with the limit frame 6, and then the upper end of the filter element assembly is fixed.

[0035] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter with a replaceable filter element unit, comprising an outer shell (1), and a lower end cover (2) fixed to one end of the outer shell (1), characterized in that: Also includes: A limiting frame (6), wherein the limiting frame (6) is fixed inside the outer shell (1) and is away from one end of the lower end cover (2), and a step groove is provided inside the limiting frame (6); A filter element assembly, wherein the filter element assembly is movably mounted in the outer shell (1), and the upper end of the filter element assembly overlaps the inside of the step groove; A bottom bracket (15), the bottom bracket (15) being installed at one end of the outer shell (1) close to the lower end cover (2), and the bottom bracket (15) sliding along the axial direction of the outer shell (1), and a magnet (16) magnetically attracted to the bottom of the filter element assembly being fixed in the middle of the upper surface of the bottom bracket (15); An upper end cover (4) is threadedly connected to the other end of the outer shell (1), and an input pipe (7) is installed in the middle of the upper end cover (4), the other end of the input pipe (7) extends into the filter element assembly, and a pressure plate (11) is slidably installed on the outside of the input pipe (7), and a pressure spring (12) is installed on the outside of the input pipe (7) between the pressure plate (11) and the upper end cover (4), the elastic force of the pressure spring (12) causes the pressure plate (11) to slide along the axial direction of the input pipe (7), and causes the pressure plate (11) to be inserted into the step groove and abut against the upper end of the filter element assembly.

2. A filter with a replaceable filter element unit according to claim 1, characterized in that: The filter element assembly comprises an inner sleeve (8) installed in an outer shell (1); the inner sleeve (8) is made of stainless steel, and a filter element body (9) is installed in the inner sleeve (8); the upper end of the filter element body (9) passes through the inner sleeve (8) and is provided with a threaded opening; the outer side of the threaded opening is threadedly connected to a connecting ring (10); the lower surface of the connecting ring (10) abuts against the bottom of the step groove.

3. A filter with a replaceable filter element unit according to claim 2, characterized in that: A cavity is axially arranged in the filter element body (9); the lower end of the input pipe (7) extends into the cavity and is provided with a filter plate (13); the outer diameter of the filter plate (13) is greater than the outer diameter of the input pipe (7).

4. A filter with a replaceable filter element unit according to any one of claims 1 to 3, characterized in that: An elastic member (14) is symmetrically fixed to the bottom of the limiting frame (6), and the lower end of the elastic member (14) is fixedly connected to the bottom bracket (15); The elastic member (14) comprises a sleeve (141) fixed to the lower surface of the limiting frame (6), a telescopic rod (143) is axially slidably installed in the sleeve (141), one end of the telescopic rod (143) is fixedly connected to the bottom bracket (15), and the other end of the telescopic rod (143) is inserted into the sleeve (141) and is installed with a telescopic spring (142), and the other end of the telescopic spring (142) is fixedly connected to the top of the sleeve (141).

5. The filter of the replaceable filter element unit according to claim 3, characterized in that: The outer diameter of the pressing plate (11) is greater than the outer diameter of the filter element body (9), and the outer diameter of the pressing plate (11) is smaller than the outer diameter of the connecting ring (10).

6. The filter of the replaceable filter element unit according to claim 4, characterized in that: The upper surface of the upper end cover (4) is provided with a medium inlet (5) connected to the input pipe (7), and the lower surface of the lower end cover (2) is fixed with a mounting column (3), and the other end of the mounting column (3) is fixed with a connecting flange.

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