Positive pressure filter mounting structure capable of preventing filter cloth from deforming

Abstract

A positive pressure filter mounting structure capable of preventing filter cloth from deforming comprises a sealing cover, a filter cylinder and a base which are detachably connected in sequence from top to bottom, and a sealing gasket and a filter cloth assembly are arranged between the filter cylinder and the base; the sealing gasket is detachably connected to the lower end surface of the filter cylinder; the filter cloth assembly comprises an annular filter frame and filter cloth, the annular filter frame is connected with the upper end face of the filter cylinder in an inserted mode, the upper end face of the annular filter frame is flush with the upper end face of the filter cylinder, and the axis of the annular filter frame coincides with the axis of the filter cylinder; the filter cloth is detachably connected in the annular filter frame and can cover the upper port of the base. The filter cloth is installed in the annular filter frame of the filter cloth assembly, the annular filter frame can fix the filter cloth, the filter cloth is installed on the upper end face of the filter cylinder through the annular filter frame, after the filter cylinder with the sealing gasket is installed on the filter cloth, the filtering effect is achieved, and the filter cloth is not directly laid on the upper end face of the filter cylinder, so that the filter cloth is not directly laid on the upper end face of the filter cylinder. And wrinkles or deformation caused by movement or rotation of the filter cylinder body can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of positive pressure filters, in particular to a positive pressure filter installation structure capable of preventing filter cloth from being deformed. Background Art

[0002] A positive pressure filter usually includes an upper cover, a filter cylinder and a base which are detachably connected from top to bottom. The upper cover is provided with a liquid inlet, the base is provided with a liquid outlet, and a filter cloth is provided between the filter cylinder and the base to filter tiny particles and suspended matter in the liquid.

[0003] The filter cloth of the prior art directly covers the upper port of the base, and then is pressed against the base by the filter cylinder to realize the installation of the filter cloth. When the filter cylinder is installed on the base, it is necessary to move or rotate the filter cylinder on the base several times so that the installation hole on the filter cylinder is aligned with the installation hole on the base. However, when the filter cylinder moves or rotates, the filter cloth below it will move with it, causing wrinkles and deformation of the filter cloth, which is not conducive to filtering the solution of the positive pressure filter, and will also cause rupture due to the high pressure in the positive pressure filter. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a positive pressure filter installation structure which can prevent the filter cloth from being deformed.

[0005] The technical solution of this utility model is as follows:

[0006] A positive pressure filter installation structure for preventing filter cloth deformation, comprising a sealing cover, a filter cylinder and a base which are detachably connected in sequence from top to bottom, and a sealing pad and a filter cloth assembly are arranged between the filter cylinder and the base;

[0007] The sealing gasket is detachably connected to the lower end surface of the filter cylinder;

[0008] The filter cloth assembly includes an annular filter frame and a filter cloth. The annular filter frame is plug-connected with the upper end surface of the filter cylinder, and the upper end surface of the annular filter frame is flush with the upper end surface of the filter cylinder. The axis of the annular filter frame coincides with the axis of the filter cylinder.

[0009] The filter cloth is detachably connected to the annular filter frame and can cover the upper port of the base;

[0010] The annular filter frame comprises an annular inner frame and an annular outer frame which are detachably connected. The outer edge of the filter cloth is arranged between the outer side surface of the annular inner frame and the inner side surface of the annular outer frame. The annular inner frame and the annular outer frame can fix and clamp the outer edge of the filter cloth.

[0011] The filter cloth is installed in the annular filter frame of the filter cloth assembly. The annular filter frame can fix the filter cloth. The filter cloth can be installed on the upper end surface of the filter cylinder through the annular filter frame. After the filter cylinder with a sealing gasket is installed thereon, the filtering effect is achieved. The filter cloth is not directly laid on the upper end surface of the filter cylinder and will not be wrinkled or deformed due to the movement or rotation of the filter cylinder.

[0012] The filter cloth is first covered on the annular inner frame, and then an annular outer frame is arranged outside the annular inner frame to fix the filter cloth. In order to facilitate the installation of the annular outer frame on the outside of the annular inner frame and prevent it from detaching from the annular inner frame, a support platform is provided on the lower end surface of the annular inner frame. The support platform extends outward in the radial direction of the annular inner frame, and its upper end surface is located below the lower end surface of the annular outer frame.

[0013] To facilitate quick installation and confirm whether the outer edge of the filter cloth is fixed between the annular inner frame and the annular outer frame, the heights of the annular inner frame and the annular outer frame are the same. Press the annular outer frame downward, and the annular outer frame drives the outer edge of the filter cloth to move downward until the upper end surfaces of the annular inner frame and the annular outer frame are flush, so that the outer edge of the filter cloth is fixed between the annular inner frame and the annular outer frame.

[0014] In order to assist in tightening the filter when installing the annular outer frame, a plurality of rubber tensioning sheets are provided on the annular surface of the annular outer frame close to the annular inner frame. The rubber tensioning sheets are arranged on the upper part of the annular surface and their length direction is arranged along the circumferential direction of the annular surface.

[0015] In order to ensure that the rubber tensioning sheet does not affect the fixing of the filter screen when the annular outer frame is sleeved on the outer side of the annular inner frame, the thickness of the rubber tensioning sheet is not greater than the difference between the inner diameter of the annular outer frame and the outer diameter of the annular inner frame.

[0016] The above-mentioned annular filter frame is plugged into the upper end surface of the filter cylinder. The upper end surface of the base is provided with an annular mounting groove along its circumferential direction, and the width of its bottom surface is greater than the sum of the widths of the support platform and the lower end surface of the annular inner frame, and its depth is not less than the sum of the heights of the annular inner frame and the support platform.

[0017] In order to facilitate the annular outer frame to quickly drive the outer edge of the filter to be installed on the outer side of the annular inner frame, an annular baffle is provided on the side of the support platform away from the annular inner frame. The annular baffle is coaxial with the annular inner frame, and the annular outer frame is inserted between the annular baffle and the annular inner frame.

[0018] The beneficial effects of the utility model are:

[0019] Before installing the filter cylinder on the base, first cover the filter cloth on the upper end surface of the annular inner frame. The area of ​​the filter cloth is larger than that of the annular inner frame, so that the outer edge of the filter cloth can be located outside the annular inner frame. The annular outer frame is inserted between the annular inner frame and the annular baffle. When the annular outer frame moves downward, the outer edge of the filter cloth can be driven downward to tighten the filter cloth. When the upper end surfaces of the annular inner frame and the annular outer frame are flush, the outer edge of the filter cloth is fixed between the annular inner frame and the annular outer frame, which plays a preliminary fixing role on the filter cloth. The tightened filter cloth can be limited by connecting bolts.

[0020] A rubber tensioning sheet is arranged on the upper part of the annular surface of the annular inner frame, and the rubber tensioning sheet can drive the filter cloth to be tightened by friction when the annular outer frame moves downward, thereby playing an auxiliary effect of tightening the filter cloth, and the rubber tensioning sheet is located between the outer side surface of the annular inner frame and the inner side surface of the annular outer frame, and can clamp the annular outer frame to the outer side surface of the annular inner frame;

[0021] The annular filter frame is plugged into the upper end surface of the filter cylinder, which can prevent the taut filter cloth from moving or deforming under the drive of the sealing cover and prevent the filter cloth from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the attached picture:

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure;

[0024] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 3 for Figure 2 The enlarged structural diagram at B in the middle;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the filter cloth assembly and the filter cloth part;

[0027] Figure 5 for Figure 4 The enlarged structural diagram at C in the middle;

[0028] The components represented by the reference numerals in the figure are:

[0029] 1. Sealing cover; 2. Filter cylinder; 3. Base; 31. Annular mounting groove; 4. Sealing gasket; 5. Annular filter frame; 51. Annular inner frame; 52. Annular outer frame; 6. Filter cloth; 7. Support platform; 8. Annular baffle; 9. Rubber tensioning sheet; 10. Connecting bolts. DETAILED DESCRIPTION

[0030] See also Figure 1 , Figure 2 and Figure 3As shown, a positive pressure filter installation structure for preventing filter cloth deformation comprises a sealing cover 1, a filter cylinder 2 and a base 3 which are detachably connected from top to bottom in sequence. The sealing cover 1 is installed on the upper end surface of the filter cylinder 2, which is a prior art and is not shown in the figure. A sealing gasket 4 and a filter cloth assembly are arranged between the filter cylinder 2 and the base 3. The cross section of the sealing gasket 4 in this embodiment is an inverted U-shaped structure, and its bottom surface is a plane. The sealing gasket 4 is sleeved on the lower end surface of the filter cylinder 2. There is no need to align the sealing gasket 4 on the upper end surface of the base 3 in advance, and then align the lower end surface of the filter cylinder 2 with the sealing gasket 4. This embodiment facilitates the rapid installation of the filter cylinder 2 on the base 3.

[0031] Among them, see Figure 4 and Figure 5 As shown, the filter cloth assembly includes an annular filter frame 5 and a filter cloth 6. The annular filter frame 5 is plug-connected with the upper end surface of the filter cylinder 2, which is convenient for quick installation and removal of the annular filter frame 5, as well as replacement and cleaning of the filter cloth 6. The upper end surface of the annular filter frame 5 is flush with the upper end surface of the filter cylinder 2, and the axis of the annular filter frame 5 coincides with the axis of the filter cylinder 2. The filter cloth 6 is detachably connected to the annular filter frame 5 and can cover the upper port of the base 3. The outer edge of the filter cloth 6 is inconvenient to be directly laid flat on the upper port of the base 3, which is conducive to the annular filter frame 5 to fix and support the filter cloth 6, and to lay the filter cloth 6 flat on the upper port to achieve filtering operation.

[0032] See also Figure 4 As shown, the specific structure of the above-mentioned annular filter frame 5 is that the annular filter frame 5 includes an annular inner frame 51 and an annular outer frame 52 that are detachably connected, and the outer edge of the filter cloth 6 is arranged between the outer side surface of the annular inner frame 51 and the inner side surface of the annular outer frame 52, and the annular inner frame 51 and the annular outer frame 52 can fix and clamp the outer edge of the filter cloth 6.

[0033] The specific structure of the above-mentioned annular filter frame 5 plug-connected with the upper end surface of the filter cylinder 2 is that the upper end surface of the base 3 is provided with an annular installation groove 31 along its circumferential direction. The annular installation groove 31 can be set at the middle position of the upper end surface of the base 3, so that the inner diameter of the annular filter frame 5 is larger than the inner diameter of the inner wall of the base 3, and then the area of ​​the filter cloth 6 is larger than the upper end of the base 3. In order to facilitate the smooth installation of the annular inner frame 51, the annular outer frame 52, the annular baffle 8, the support platform 7 and the connecting bolts 10 in the annular installation groove 31, the width of the bottom surface of the annular installation groove 31 is set to be larger than the sum of the widths of the lower end surfaces of the support platform 7, the annular baffle 8 and the annular inner frame 51, and the depth of the annular installation groove 31 is not less than the sum of the heights of the annular inner frame 51 and the support platform 7, so that the filter cloth is in close contact with the upper end surface of the base 3 and can be pressed downward by the sealing gasket 4.

[0034] The filter cloth 6 is first covered on the annular inner frame 51, and then the annular outer frame 52 is arranged outside the annular inner frame 51 to fix the filter cloth 6. In order to facilitate the installation of the annular outer frame 52 on the outside of the annular inner frame 51 so that it will not separate from the annular inner frame 51, a support platform 7 is provided on the lower end surface of the annular inner frame 51. The support platform 7 extends outward along the radial direction of the annular inner frame 51, and its upper end surface is located below the lower end surface of the annular outer frame 52. In order to facilitate the annular outer frame 52 to quickly drive the outer edge of the filter to be installed on the outer side of the annular inner frame 51, a side of the support platform 7 away from the annular inner frame 51 is provided with an annular baffle 8, the annular baffle 8 is coaxial with the annular inner frame 51, and the annular outer frame 52 is inserted between the annular baffle 8 and the annular inner frame 51.

[0035] To facilitate quick installation and confirm whether the outer edge of the filter cloth 6 is fixed between the annular inner frame 51 and the annular outer frame 52, the heights of the annular inner frame 51 and the annular outer frame 52 are the same. The annular outer frame 52 is pressed downward, and the annular outer frame 52 drives the outer edge of the filter cloth 6 to move downward until the upper end surfaces of the annular inner frame 51 and the annular outer frame 52 are flush, so that the outer edge of the filter cloth 6 is fixed between the annular inner frame 51 and the annular outer frame 52. If the gap between the annular inner frame 51 and the annular outer frame 52 is greater than the thickness of the filter cloth 6, the annular inner frame 51 and the annular outer frame 52 are connected and fixed by connecting bolts 10. The end of the connecting bolt 10 is set on the inner side of the annular inner frame 51, and the connecting bolt 10 passes through the annular inner frame 51 and the annular outer frame 52 in sequence to play a connecting role.

[0036] See also Figure 5 As shown, in order to facilitate the auxiliary tightening of the filter screen when installing the annular outer frame 52, the annular surface of the annular outer frame 52 close to the annular inner frame 51 is provided with a plurality of rubber tensioning sheets 9, which are arranged on the upper part of the annular surface, and the plurality of rubber tensioning sheets 9 are located in the same horizontal plane, and the length direction of the rubber tensioning sheets 9 is arranged along the circumferential direction of the annular surface. In order to ensure that the rubber tensioning sheets 9 do not affect the fixing of the filter screen when the annular outer frame 52 is sleeved on the outside of the annular inner frame 51, the thickness of the rubber tensioning sheets 9 is not greater than the difference between the inner diameter of the annular outer frame 52 and the outer diameter of the annular inner frame 51.

Claims

1. A positive pressure filter installation structure for preventing filter cloth deformation, comprising a sealing cover (1), a filter cylinder (2) and a base (3) which are detachably connected in sequence from top to bottom, characterized in that: A sealing gasket (4) and a filter cloth assembly are provided between the filter cylinder (2) and the base (3); The sealing gasket (4) is detachably connected to the lower end surface of the filter cylinder (2); The filter cloth assembly comprises an annular filter frame (5) and a filter cloth (6); the annular filter frame (5) is plug-connected to the upper end surface of the filter cylinder (2), and the upper end surface of the annular filter frame (5) is flush with the upper end surface of the filter cylinder (2); The filter cloth (6) is detachably connected to the annular filter frame (5) and is capable of covering the upper port of the base (3); The annular filter frame (5) comprises an annular inner frame (51) and an annular outer frame (52) which are detachably connected, and the outer edge of the filter cloth (6) is arranged between the outer side surface of the annular inner frame (51) and the inner side surface of the annular outer frame (52).

2. A positive pressure filter installation structure for preventing filter cloth deformation according to claim 1, characterized in that: A support platform (7) is provided on the lower end surface of the annular inner frame (51). The support platform (7) extends outwardly along the radial direction of the annular inner frame (51), and its upper end surface is located below the lower end surface of the annular outer frame (52).

3. A positive pressure filter installation structure for preventing filter cloth deformation according to claim 2, characterized in that: The annular inner frame (51) and the annular outer frame (52) have the same height.

4. The positive pressure filter installation structure for preventing filter cloth deformation according to claim 1, characterized in that: The annular surface of the annular outer frame (52) close to the annular inner frame (51) is provided with a plurality of rubber tensioning sheets (9), which are arranged on the upper part of the annular surface and whose length direction is arranged along the circumferential direction of the annular surface.

5. A positive pressure filter installation structure for preventing filter cloth deformation according to claim 4, characterized in that: The thickness of the rubber tension sheet (9) is not greater than the difference between the inner diameter of the annular outer frame (52) and the outer diameter of the annular inner frame (51).

6. A positive pressure filter installation structure for preventing filter cloth deformation according to claim 4, characterized in that: The upper end surface of the base (3) is provided with an annular mounting groove (31) along its circumferential direction, the width of the bottom surface of which is greater than the sum of the widths of the lower end surfaces of the support platform (7) and the annular inner frame (51), and the depth of which is not less than the sum of the heights of the annular inner frame (51) and the support platform (7).

7. A positive pressure filter installation structure for preventing filter cloth deformation according to claim 2, characterized in that: A circular baffle (8) is provided on a side of the support platform (7) away from the circular inner frame (51); the circular baffle (8) is coaxial with the circular inner frame (51); and the circular outer frame (52) is inserted between the circular baffle (8) and the circular inner frame (51).

Images