Positive pressure filter convenient to disassemble and assemble

Abstract

A positive pressure filter convenient to disassemble and assemble comprises an upper end cover, a middle cylinder body and a lower end cover, and the upper end cover and the middle cylinder body are detachably connected through at least two groups of quick assembly units; the quick mounting unit comprises a fastener and a clamping seat, and the clamping seat is arranged on the outer side of the lower end of the upper end cover and corresponds to the fastener; the fastener comprises a screw rod and a nut on the screw rod, one end of the screw rod is hinged to the first hinge seat through a cylindrical hinge piece, a gap is formed between the cylindrical hinge piece and the outer side face of the middle barrel, and teeth are arranged on the outer side face of the cylindrical hinge piece; the clamping base comprises a rack, the length direction of the rack is parallel to the axis of the upper end cover, and the rack can be inserted into the gap and meshed with the teeth of the cylindrical hinge piece. The rack on the lower portion of the upper end cover is vertically inserted between the cylindrical hinge piece and the outer side face of the middle barrel, the upper end cover does not need to be moved or rotated repeatedly, and the upper end cover can be conveniently and rapidly aligned to the upper end of the middle barrel in the mode that the rack is inserted.

Description

Technical Field

[0001] The utility model relates to the technical field of positive pressure filters, in particular to a positive pressure filter which is convenient to assemble and disassemble. Background Art

[0002] A positive pressure filter is a device used for liquid filtration that forces the liquid through the filter medium by applying positive pressure to separate suspended matter, particulate matter, microorganisms, etc.

[0003] The positive pressure filter of the prior art generally comprises an upper end cover, an intermediate cylinder and a lower end cover which are detachably connected from top to bottom, wherein the upper end cover and the intermediate cylinder are connected by a plurality of eyebolts, and the upper end cover is pressed against the intermediate cylinder by rotating the eyebolts to the upper end cover, tightening the eyebolts thereon, and pressing down the clamping seat. However, there are multiple sets of such eyebolts and clamping seats, and each time the upper end cover is installed and removed, the eyebolts and the clamping seat need to be aligned before they can be installed in groups, which is an inconvenient installation method; and the upper end cover and the intermediate cylinder are also inconvenient to align, which affects the efficiency of the upper end cover's assembly and disassembly. 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 which is convenient for disassembly and assembly.

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

[0006] A positive pressure filter that is easy to disassemble and assemble, comprising an upper end cover, an intermediate cylinder and a lower end cover that are sequentially connected in upper and lower order, wherein the upper end cover and the intermediate cylinder are detachably connected via at least two sets of quick-install units;

[0007] The quick-install unit includes a fastener and a clamping seat, wherein the fastener is arranged on the outer side of the upper end of the intermediate cylinder, and the clamping seat is arranged on the outer side of the lower end of the upper end cover and corresponds to the fastener;

[0008] The fastener comprises a screw and a nut thereon, a first hinge seat is arranged on the outer side of the upper end of the intermediate cylinder, one end of the screw is hinged to the first hinge seat through a cylindrical hinge, a gap is formed between the cylindrical hinge and the outer side of the intermediate cylinder, and teeth are arranged on the outer side of the cylindrical hinge;

[0009] The clamping seat comprises a rack extending vertically downward, the length direction of the rack is parallel to the axis of the upper end cover, and the rack can be inserted into the gap and meshed with the teeth of the cylindrical hinge.

[0010] The upper end cover and the middle cylinder are connected by fasteners. When installing the upper end cover, the rack below the upper end cover is vertically inserted between the cylindrical hinge and the outer side surface of the middle cylinder. The rack is meshed with the teeth of the cylindrical hinge, so that the end of the screw away from the cylindrical hinge is rotated upward by a certain angle. When the screw is rotated to a vertical position or the upper end cover is pressed against the middle cylinder, the nut is located above the rack. By tightening the nut and pressing the rack, the upper end cover and the middle cylinder are quickly connected.

[0011] In order to reduce the risk of significant damage to the rack when the nut is tightened, the clamping seat also includes a first pressure seat, which is arranged on one side of the rack along the circumferential direction of the upper end cover, and its upper end face is flush with or higher than the upper end face of the rack. The nut can be directly connected to the upper end face of the first pressure seat, and when the rack is placed downward, the rack can be moved downward along the side of the first pressure seat to facilitate rapid engagement with the teeth of the cylindrical hinge.

[0012] To facilitate further positioning of the rack, a second pressure-bearing seat is provided on one side of the rack away from the first pressure-bearing seat, and the rack is inserted between the first pressure-bearing seat and the second pressure-bearing seat.

[0013] Regarding the specific structure of the cylindrical hinge, the outer side of the cylindrical hinge is provided with a toothless portion and a toothed portion, and the arc length corresponding to the toothed portion is smaller than the length of the rack. When the screw is rotated upward to a vertical state, the toothless portion contacts the rack, and the upper end cover can be further pressed against the intermediate cylinder by tightening the nut downward, thereby improving the connection strength and sealing with the intermediate cylinder.

[0014] The specific structure of the toothed portion is that the arc length corresponding to the toothed portion is less than π / 2, so that when the bolt is rotated upward to a vertical state, the toothless portion contacts the rack.

[0015] Regarding the arrangement position of the toothed portion, the toothed portion is arranged on a side surface of the cylindrical hinged component away from the screw rod.

[0016] The specific structure of the first hinge seat is that the first hinge seat includes two hinge plates arranged along the circumferential direction of the intermediate cylinder, and the cylindrical hinge is rotatably arranged between the two hinge plates through a rotating shaft.

[0017] In order to facilitate the screw rod to be rotated upward to a certain angle through the rack, the length of the rack is greater than the minimum vertical distance between the upper end surface of the pressure seat and the lowest part of the cylindrical hinge.

[0018] In order to improve the connection efficiency between the lower end cover and the intermediate cylinder, the lower end cover and the lower part of the intermediate cylinder are detachably connected through at least two sets of quick-install units.

[0019] The beneficial effects of the utility model are:

[0020] The rack under the upper end cover is vertically inserted between the cylindrical hinge and the outer side of the intermediate cylinder, so there is no need to repeatedly move or rotate the upper end cover. A sealing gasket is usually installed between the upper end cover and the intermediate cylinder for sealing, which is not conducive to repeatedly moving or rotating the upper end cover. The utility model facilitates the upper end cover to be quickly aligned with the upper end of the intermediate cylinder by inserting the rack.

[0021] When the rack is placed downward, the rack can be moved downward along the side of the first pressure-bearing seat or between the two pressure-bearing seats to facilitate rapid engagement with the teeth of the cylindrical hinge;

[0022] The arc length corresponding to the toothed portion of the cylindrical hinge is smaller than the length of the rack. When the screw is rotated upward to a vertical state, the toothless portion contacts the rack. The upper end cover can be further pressed against the intermediate cylinder by tightening the nut downward, thereby improving the connection strength and sealing with the intermediate cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 It is a structural schematic diagram;

[0025] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 3 It is a top view;

[0027] Figure 4 for Figure 3 AA section structural diagram;

[0028] Figure 5 for Figure 1 The enlarged structural diagram at B in the middle;

[0029] The components represented by the reference numerals in the figure are:

[0030] 1. Upper end cover; 2. Intermediate cylinder; 3. Lower end cover; 4. Fastener; 41. Screw; 42. Nut; 5. Snap-fit ​​seat; 51. Rack; 52. First pressure-bearing seat; 53. Second pressure-bearing seat; 6. First hinge seat; 61. Hinge plate; 7. Cylindrical hinge; 71. Toothed portion; 72. Non-toothed portion; 8. Rotating shaft. DETAILED DESCRIPTION

[0031] See also Figure 1 and Figure 3A positive pressure filter that is easy to disassemble and assemble is shown, comprising an upper end cover 1, an intermediate cylinder 2 and a lower end cover 3 that are connected in sequence from top to bottom. The upper end cover 1 and the intermediate cylinder 2 are detachably connected by at least two groups of quick-install units. In this embodiment, six groups of quick-install units are arranged on the upper end cover 1 and the intermediate cylinder 2 to improve the connection efficiency between the lower end cover 3 and the intermediate cylinder 2. Six groups of quick-install units are also arranged between the lower end cover 3 and the intermediate cylinder 2.

[0032] Among them, a single quick-install unit includes a fastener 4 and a clamping seat 5. The fastener 4 is arranged on the outer side of the upper end of the intermediate cylinder 2, and the clamping seat 5 is arranged on the outer side of the lower end of the upper end cover 1 and corresponds to the fastener 4.

[0033] The fastener 4 includes a screw rod 41 and a nut 42 thereon. The nut 42 can be a common nut, a butterfly nut or a ring nut. One end face of the nut 42 can contact the upper end face of the rack 51 or the first pressure-bearing seat 52 and the second pressure-bearing seat 53. A first hinge seat 6 is provided on the outer side of the upper end of the intermediate cylinder 2. One end of the screw rod 41 is hinged to the first hinge seat 6 through a cylindrical hinge 7. There is a gap between the cylindrical hinge 7 and the outer side of the intermediate cylinder 2, and teeth are provided on the outer side of the cylindrical hinge 7. The specific structure of the first hinge seat 6 is that the first hinge seat 6 includes two hinge plates 61 arranged along the circumferential direction of the intermediate cylinder 2. The cylindrical hinge 7 is rotatably arranged between the two hinge plates 61 through a rotating shaft 8. The cylindrical hinge 7 is fixedly connected to the rotating shaft 8, and the two ends of the rotating shaft 8 are rotatably connected to the two hinge plates 61 respectively.

[0034] See also Figure 2 , Figure 4 and Figure 5As shown, the outer side of the cylindrical hinge 7 is provided with a toothless portion 72 and a toothed portion 71, and the arc length corresponding to the toothed portion 71 is less than the length of the rack 51. When the screw 41 rotates upward to a vertical state, the toothless portion 72 contacts the rack 51, and the upper end cover 1 can be further pressed against the intermediate cylinder 2 by tightening the nut 42 downward, thereby improving the connection strength and sealing performance with the intermediate cylinder 2. The specific structure of the toothed portion 71 is that the arc length corresponding to the toothed portion 71 is less than π / 2, so that the toothless portion 72 contacts the rack 51 when the bolt rotates upward to a vertical state. The toothed portion 71 is arranged on a side of the cylindrical hinge 7 away from the screw rod 41, so that in the initial state (vertically downward state) of the screw rod 41, one end of the toothed portion 71 can be located on a side close to the rack 51 and can mesh with the rack 51 moving downward. When the rack 51 moves downward, the toothed portion 71 drives the screw rod 41 to gradually rotate upward, which is convenient for the staff to quickly grasp the screw rod 41 without bending over to lift the screw rod 41 from the bottom. In addition, the rack 51 has a certain length so that the end of the screw rod 41 with the nut 42 can be lifted upward from the bottom through the rack 51. The staff can also rotate the screw 41 to drive the rack to move the upper end cover 1 downward quickly, and there are two operating modes; when the rack 51 is engaged with the toothed portion 71 to complete the corresponding stroke, the end of the screw 41 with the nut 42 is in an upward state, and the toothless portion 72 begins to contact the rack, so that the toothed portion 71 is disengaged from the rack, and the screw 41 and the rack are no longer in a meshing relationship. By tightening the nut 42, the corresponding first pressure seat 52 and the second pressure seat 53 can be pressed down by the nut 42. In this way, tighten the nuts 42 at other positions to press the upper end cover 1 and the intermediate cylinder 2.

[0035] See also Figure 2 As shown, the clamping seat 5 includes a rack 51 extending vertically downward, the length direction of the rack 51 is parallel to the axis of the upper end cover 1, and the rack 51 can be inserted into the gap and mesh with the teeth of the cylindrical hinge 7. In order to facilitate the screw 41 to rotate upward to a certain angle through the rack 51, the length of the rack 51 is greater than the minimum vertical distance between the upper end surface of the pressure seat and the lowest part of the cylindrical hinge 7.

[0036] See also Figure 2As shown, in order to reduce the damage to the rack 51 caused by the nut 42 when tightening, the clamping seat 5 also includes a first pressure-bearing seat 52 and a second pressure-bearing seat 53. The first pressure-bearing seat 52 is arranged on one side of the rack 51 along the circumferential direction of the upper end cover 1, and the second pressure-bearing seat 53 is arranged on the side of the rack 51 away from the first pressure-bearing seat 52. The upper end surfaces of the first pressure-bearing seat 52 and the second pressure-bearing seat 53 are respectively flush with the upper end surface of the rack 51. The nut 42 can be directly connected to the upper end surface of the first pressure-bearing seat 52, and the rack 51 is placed downward, and the rack 51 can be moved down along the side of the first pressure-bearing seat 52, so as to quickly engage with the teeth of the cylindrical hinge 7. The rack 51 is inserted between the first pressure-bearing seat 52 and the second pressure-bearing seat 53.

[0037] The function of the above structure is that the upper end cover 1 and the intermediate cylinder body 2 are connected by the fastener 4. When the upper end cover 1 is installed, the rack 51 below the upper end cover 1 is vertically inserted between the cylindrical hinge 7 and the outer side surface of the intermediate cylinder body 2. Through the engagement of the teeth of the rack 51 and the cylindrical hinge 7, the end of the screw 41 away from the cylindrical hinge 7 is rotated upward by a certain angle. When the screw 41 is rotated to a vertical position or the upper end cover 1 is pressed against the intermediate cylinder body 2, the nut 42 is located above the rack 51. By tightening the nut 42 and pressing the rack 51, the upper end cover 1 and the intermediate cylinder body 2 are quickly connected.

Claims

1. A positive pressure filter that is easy to disassemble and assemble, comprising an upper end cover (1), an intermediate cylinder (2) and a lower end cover (3) connected in sequence, characterized in that: The upper end cover (1) and the intermediate cylinder (2) are detachably connected via at least two sets of quick-install units; The quick-install unit comprises a fastener (4) and a clamping seat (5), wherein the fastener (4) is arranged on the outer side of the upper end of the intermediate cylinder (2), and the clamping seat (5) is arranged on the outer side of the lower end of the upper end cover (1) and corresponds to the fastener (4); The fastener (4) comprises a screw rod (41) and a nut (42) thereon, a first hinge seat (6) is provided on the intermediate cylinder (2), one end of the screw rod (41) is hinged to the first hinge seat (6) via a cylindrical hinge member (7), a gap is formed between the cylindrical hinge member (7) and the outer side surface of the intermediate cylinder (2), and teeth are provided on the outer side surface of the cylindrical hinge member (7); The clamping seat (5) comprises a rack (51) extending vertically downward, and the rack (51) can be inserted into the gap and mesh with the teeth of the cylindrical hinge (7).

2. A positive pressure filter that is easy to disassemble and assemble according to claim 1, characterized in that: The clamping seat (5) also includes a first pressure-bearing seat (52) which is arranged on one side of the rack (51) along the circumferential direction of the upper end cover (1), and whose upper end surface is flush with or higher than the upper end surface of the rack (51).

3. The positive pressure filter that is easy to disassemble and assemble according to claim 2, characterized in that: A second pressure-bearing seat (53) is provided on a side of the rack (51) away from the first pressure-bearing seat (52), and the rack (51) is inserted between the first pressure-bearing seat (52) and the second pressure-bearing seat (53).

4. The positive pressure filter that is easy to disassemble and assemble according to claim 1, characterized in that: The outer side surface of the cylindrical hinged component (7) is provided with a non-toothed portion (72) and a toothed portion (71), and the arc length corresponding to the toothed portion (71) is smaller than the length of the rack (51).

5. The positive pressure filter that is easy to disassemble and assemble according to claim 4, characterized in that: The arc length corresponding to the toothed portion (71) is less than π / 2.

6. The positive pressure filter that is easy to disassemble and assemble according to claim 5, characterized in that: The toothed portion (71) is arranged on a side of the cylindrical hinge (7) away from the screw rod (41).

7. The positive pressure filter that is easy to disassemble and assemble according to claim 1, characterized in that: The first hinge seat (6) comprises two hinge plates (61) arranged along the circumferential direction of the intermediate cylinder (2), and the cylindrical hinge member (7) is rotatably arranged between the two hinge plates (61) via a rotating shaft (8).

8. The positive pressure filter that is easy to disassemble and assemble according to claim 1, characterized in that: The length of the rack (51) is greater than the minimum vertical distance between the upper end surface of the pressure bearing seat and the lowest part of the cylindrical hinged component (7).

9. The positive pressure filter that is easy to disassemble and assemble according to claim 1, characterized in that: The lower end cover (3) is detachably connected to the lower part of the intermediate cylinder (2) via at least two sets of quick-install units.

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