Porous PE sintering suction head filter element

Abstract

The utility model discloses a porous PE (Poly Ethylene) sintered suction head filter element which comprises a bottom plate, the bottom of the mounting seat is fixedly connected with the top of the bottom plate; the bottom of the filtering mechanism is connected with the inner wall of the mounting seat in a clamping manner; the bottom of the quick connecting mechanism is fixedly connected with the top of the bottom plate; the filter mechanism comprises a filter cartridge, connecting ribs are fixedly connected to the inner wall of the filter cartridge, the inner wall of the filter cartridge is annularly arrayed along the central axis of the filter cartridge, and filter plates are fixedly connected to the outer walls of the connecting ribs. Impurities in liquid are preliminarily filtered through the filtering grooves in the filtering cone, the liquid filtered through the filtering grooves and the impurities enter the cavity between the filtering cone and the filtering cylinder, then the liquid and the impurities are filtered through the filtering plate, and the purpose of the porous PE sintering suction head filter element is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipette tip filter elements, in particular to a porous PE sintered pipette tip filter element. Background Art

[0002] Filter tips are consumables used with pipettes. The tips themselves are mainly made of medical-grade polypropylene. When in use, the tips cooperate with the pipette to aspirate or discharge liquid samples and complete the pipetting process of liquid samples. They are widely used in medical research, biological research, chemical laboratories and other fields.

[0003] However, in the prior art, during the process of filtering liquid, the traditional filter element uses an integral filter element without holes on the surface in order to improve the filtering efficiency of the liquid. Therefore, the flow rate of the liquid is slowed down due to the obstruction of the filter element, thereby affecting the fluidity of the liquid. In addition, the filter element of the filter element is a wearing part, so after long-term use, the filter element needs to be replaced. The traditional filter element does not have a quick-connect device, which makes it impossible for the staff to quickly replace the filter element, affecting the filtering efficiency of the filter element. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical solution adopted by the utility model to solve the technical problems is: a porous PE sintered suction head filter element, comprising:

[0005] Base plate;

[0006] A mounting seat, the bottom of which is fixedly connected to the top of the base plate;

[0007] A filter mechanism, the bottom of which is engaged with the inner wall of the mounting seat, and the filter mechanism is used to filter liquid;

[0008] A quick-connect mechanism, the bottom of which is fixedly connected to the top of the bottom plate, and the quick-connect mechanism is used for quickly replacing the filter mechanism;

[0009] The filtering mechanism includes a filter cartridge, the inner wall of which is fixedly connected with connecting ribs, which are arranged in a ring array along the central axis of the filter cartridge, the outer wall of which is fixedly connected with a filter plate, a filter cone is arranged inside the filter cartridge, the outer wall of which is fixedly connected with a guide cone, the top of which is fixedly connected with a mounting ring, and filter grooves are provided in the wall of the filter cone, which are arranged in a ring array along the central axis of the filter cone.

[0010] Preferably, the outer wall of the mounting ring is fixedly connected to a support plate, a groove is provided in the wall of the support plate, the outer wall of the mounting ring is slidably connected to the inner wall of the top of the filter cartridge, and the bottom of the filter cone is snap-fitted to the inner wall of the mounting seat.

[0011] Preferably, the quick-connect mechanism includes a fixing ring, the outer wall of which is fixedly connected to a fixing plate and arranged in a ring shape along the central axis of the fixing ring, an oblique groove is provided on the outer wall at the top of the fixing plate, the bottom of the fixing plate is fixedly connected to a tension spring, a claw is provided at the bottom of the fixing ring, the outer wall of the claw is fixedly connected to an end of the tension spring away from the fixing plate, the bottom of the fixing ring is fixedly connected to a support column and arranged in a ring shape along the central axis of the fixing ring.

[0012] Preferably, the bottom of the support column is fixedly connected to the top of the base plate, the bottom of the fixing ring is fixedly connected with a lifting ear, the lifting ear is connected to the claw through a rotating shaft, the outer wall of the claw is fixedly connected with an anti-sliding block, and is linearly arrayed along the outer wall of the claw.

[0013] Preferably, the outer wall of the lifting ear is rotatably connected to the end of the claw away from the anti-sliding block, and the outer wall of the claw is slidably connected to the inner wall of the filter cartridge via a limiting groove. The limiting groove is provided in the wall of the filter cartridge, and a positioning groove is also provided in the wall of the filter cartridge. The outer wall of the anti-sliding block is in contact with the inner wall of the filter cartridge.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model sets a filtering mechanism and uses the filter groove on the filter cone to preliminarily filter the impurities in the liquid. The liquid and impurities filtered by the filter groove enter the cavity between the filter cone and the filter cylinder. The liquid and impurities are then filtered through the filter plate, thereby achieving the purpose of filtering the liquid by using the porous surfaces on the filter cylinder and the filter cone and reducing the obstruction of the liquid, and solving the problem that the traditional equipment cannot reduce the obstruction of the liquid.

[0016] 2. The utility model sets a quick-connect mechanism and utilizes a tension spring to drive the claw to move, which slides into the limiting groove in the fixed cylinder through the claw, and an anti-slip block is fixed on the claw. The friction between the claw and the filter cylinder is increased through the anti-slip groove, thereby increasing the fixing force of the claw on the filter cylinder. The filter cone is clamped in the mounting seat, and the filter cone can be replaced by simply plugging and pulling out the filter cone with force, thereby achieving the purpose of quickly replacing the filter cylinder and the filter cone, and solving the problem that the filter element cannot be quickly replaced in traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the filter cartridge of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the utility model at A;

[0021] Figure 5 It is a structural schematic diagram of the filtering mechanism of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the quick-connect mechanism of the utility model.

[0023] In the figure: 1. bottom plate; 2. filter mechanism; 21. filter cartridge; 22. connecting rib; 23. filter plate; 24. limiting groove; 25. mounting ring; 26. filter cone; 27. guide cone; 28. filter groove; 29. ​​support plate; 3. quick-connect mechanism; 31. fixing ring; 32. fixing plate; 33. tension spring; 34. claw; 35. lifting ear; 36. anti-sliding block; 37. support column; 4. mounting seat. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes. Example

[0025] See also Figure 1 - Figure 6 The utility model provides a technical solution: a porous PE sintered suction head filter element, comprising:

[0026] Bottom plate 1;

[0027] A mounting seat 4, the bottom of which is fixedly connected to the top of the base plate 1;

[0028] The filter mechanism 2 has a bottom that is snap-fitted to the inner wall of the mounting seat 4;

[0029] A quick-connect mechanism 3, the bottom of which is fixedly connected to the top of the base plate 1;

[0030] The filtering mechanism 2 includes a filter cartridge 21, the inner wall of which is fixedly connected with connecting ribs 22, and arranged in a ring array along the central axis of the filter cartridge 21, the outer wall of the connecting ribs 22 is fixedly connected with a filter plate 23, a filter cone 26 is arranged inside the filter cartridge 21, the outer wall of the filter cone 26 is fixedly connected with a guide cone 27, the guide cone 27 is used to guide the liquid, the top of the filter cone 26 is fixedly connected with a mounting ring 25, a filter groove 28 is opened in the wall of the filter cone 26, and arranged in a ring array along the central axis of the filter cone 26.

[0031] The outer wall of the mounting ring 25 is fixedly connected with a support plate 29. The outer wall of the mounting ring 25 is slidably connected with the inner wall of the top of the filter cartridge 21. The bottom of the filter cone 26 is clamped with the inner wall of the mounting seat 4. The quick-connection mechanism 3 includes a fixing ring 31. The outer wall of the fixing ring 31 is fixedly connected with a fixing plate 32. The inclined grooves on the fixing plate 32 are used to reduce the blockage of the liquid and are arranged in a circular array along the central axis of the fixing ring 31. The bottom of the fixing plate 32 is fixedly connected with a tension spring 33. The bottom of the fixing ring 31 is provided with a claw 34. The outer wall of the claw 34 is fixedly connected with one end of the tension spring 33 away from the fixing plate 32. The bottom of the fixing ring 31 is fixedly connected with a support column 37 and is arranged in a circular array along the central axis of the fixing ring 31.

[0032] The bottom of the support column 37 is fixedly connected with the top of the bottom plate 1. The bottom of the fixing ring 31 is fixedly connected with a lifting lug 35. The outer wall of the claw 34 is fixedly connected with an anti-slip block 36 and is linearly arranged along the outer wall of the claw 34. The outer wall of the lifting lug 35 is rotatably connected with one end of the claw 34 away from the anti-slip block 36. The anti-slip block 36 is used to increase the friction between the claw 34 and the filter cartridge 21, thereby increasing the fixing force of the claw 34 on the filter cartridge 21. The outer wall of the claw 34 is slidably connected with the inner wall of the filter cartridge 21 through a limiting groove 24. The outer wall of the anti-slip block 36 is in contact with the inner wall of the filter cartridge 21.

[0033] Working principle:

[0034] During use, first place the bottom plate 1 on the ground, and then install the filter cartridge 21 in the filter mechanism 2 on the bottom plate 1. An annular groove is formed on the bottom plate 1. When installing the filter cartridge 21, it should be noted that the limiting groove 24 on the filter cartridge 21 should be aligned with the quick-connection mechanism 3. After sliding the filter cartridge 21 downward along the limiting groove 24 into the annular groove, the initial installation of the filter cartridge 21 is completed. Then rotate the filter cartridge 21 so that the quick-connection mechanism 3 clamps the filter cartridge 21. At this time, the installation of the filter cartridge 21 is completed. Then insert the diversion cone 27 downward along the center of the filter cartridge 21 and insert the diversion cone 27 into the mounting seat 4. When installing the diversion cone 27, the mounting ring 25 on the diversion cone 27 should be aligned with the ring groove on the filter cartridge 21. After the mounting ring 25 slides into the ring groove, the installation of the filter cartridge 21 is completed. Then the filtering work can be carried out.

[0035] When installing the filter cartridge 21, align the claw 34 in the quick-connect mechanism 3 with the limit groove 24 so that the claw 34 slides into the limit groove 24. The claw 34 is fixed to the fixing ring 31 through the lifting lug 35, so that the claw 34 can rotate up and down. The fixing ring 31 is fixed to the bottom plate 1 through the support column 37 to support the height of the fixing ring 31. An anti-slip block 36 is fixed to the outer wall of the claw 34 to increase the friction between the claw 34 and the filter cartridge 21 and the fixing force of the claw 34 on the filter cartridge 21. During the sliding process of the claw 34 in the limit groove 24, the tension spring 33 connected to the claw 34 is stretched. After the filter cartridge 21 slides into the annular groove, then rotate the filter cartridge 21 so that the claw 34 slides into the positioning groove in the limit groove 24. At this time, the claw 34 can fix the filter cartridge 21.

[0036] After the filter element has been used for a long time and its filtering effect deteriorates, only need to rotate the filter cartridge 21 in the reverse direction so that the claw 34 slides from the positioning groove into the limit groove 24, and then pull the filter cartridge 21 away from the bottom plate 1 to replace the filter cartridge 21. After the filter cartridge 21 is separated from the claw 34, because the tension spring 33 is fixed to the fixing plate 32, under the elastic action of the tension spring 33, the tension spring 33 drives the claw 34 to reset. After the filter cartridge 21 is pulled out, only need to pull the support plate 29 on the mounting ring 25 so that the support plate 29 drives the filter cone 26 to be pulled out of the mounting seat 4 to replace the filter cone 26.

[0037] During the filtering process of the filter element, the liquid first enters the filter element from the end far away from the bottom plate 1. After the liquid enters the space in the diversion cone 27, the diversion cone 27 first guides the liquid so that the guided liquid enters the cavity between the diversion cone 27 and the filter cartridge 21 through the filter slot 28. The filter slots 28 are annularly arranged on the filter cone 26. Therefore, when the filter slots 28 filter the liquid, the filter slots 28 on the filter cone 26 will filter the liquid while reducing the blockage of the liquid. When the liquid passes through the filter slot 28, impurities larger than the filter slot 28 are left in the diversion cone 27, and impurities and liquid smaller than the filter slot 28 flow into the cavity through the filter slot 28. A filter plate 23 is fixed to the inner wall of the filter cartridge 21 through the connecting ribs 22. Therefore, under the re-filtering of the filter plate 23, the filter plate 23 also filters the liquid while reducing the blockage of the liquid, so as to further filter the impurities. The filtered liquid then flows out of the filter cartridge 21 into the outside world, and at this time the filter element completes the filtering work.

[0038] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model. Structures, devices, and operation methods not specifically described and explained in the present utility model shall be implemented by conventional means in the art unless otherwise specified and limited.

Claims

1. A porous PE sintered pipette tip filter element, comprising: Bottom plate (1); A mounting seat (4), the bottom of the mounting seat (4) being fixedly connected to the top of the base plate (1); A filter mechanism (2), wherein the bottom of the filter mechanism (2) is snap-fitted to the inner wall of the mounting seat (4); A quick-connect mechanism (3), the bottom of the quick-connect mechanism (3) being fixedly connected to the top of the base plate (1); Features: The filtering mechanism (2) comprises a filter cartridge (21), the inner wall of the filter cartridge (21) being fixedly connected with connecting ribs (22) arranged in an annular array along the central axis of the filter cartridge (21), the outer wall of the connecting ribs (22) being fixedly connected with a filter plate (23), a filter cone (26) being arranged inside the filter cartridge (21), a guide cone (27) being fixedly connected to the outer wall of the filter cone (26), a mounting ring (25) being fixedly connected to the top of the filter cone (26), and filter grooves (28) being provided in the wall of the filter cone (26) arranged in an annular array along the central axis of the filter cone (26).

2. The porous PE sintered pipette tip filter according to claim 1, characterized in that: The outer wall of the mounting ring (25) is fixedly connected to a support plate (29), the outer wall of the mounting ring (25) is slidably connected to the inner wall of the top of the filter cartridge (21), and the bottom of the filter cone (26) is snap-fitted to the inner wall of the mounting seat (4).

3. The porous PE sintered pipette tip filter according to claim 1, characterized in that: The quick-connect mechanism (3) comprises a fixing ring (31), the outer wall of the fixing ring (31) is fixedly connected to a fixing plate (32) and is arranged in an annular array along the central axis of the fixing ring (31), the bottom of the fixing plate (32) is fixedly connected to a tension spring (33), the bottom of the fixing ring (31) is provided with a clamping claw (34), the outer wall of the clamping claw (34) is fixedly connected to an end of the tension spring (33) away from the fixing plate (32), and the bottom of the fixing ring (31) is fixedly connected to a support column (37) and is arranged in an annular array along the central axis of the fixing ring (31).

4. The porous PE sintered pipette tip filter according to claim 3, characterized in that: The bottom of the support column (37) is fixedly connected to the top of the bottom plate (1), the bottom of the fixing ring (31) is fixedly connected to a lifting ear (35), and the outer wall of the claw (34) is fixedly connected to an anti-sliding block (36) in a linear array along the outer wall of the claw (34).

5. The porous PE sintered pipette tip filter according to claim 4, characterized in that: The outer wall of the lifting ear (35) is rotatably connected to an end of the claw (34) away from the anti-sliding block (36), the outer wall of the claw (34) is slidably connected to the inner wall of the filter cartridge (21) via the limiting groove (24), and the outer wall of the anti-sliding block (36) is in contact with the inner wall of the filter cartridge (21).

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