Fixture for filter membrane sample preparation

Abstract

The utility model discloses a clamp for filter membrane sample preparation. The clamp comprises a fixing part fixedly arranged on external equipment, the liquid flow divider is arranged on the fixed part in a penetrating manner; the lifting component is arranged below the fixing component; the filtering module is arranged on the upper surface of the lifting component and comprises a plurality of filter membrane clamps which are aligned up and down, and the filter membrane clamps and the liquid flow divider are arranged in an up-down corresponding mode; the two guide assemblies are arranged on the two sides of the filtering module correspondingly, the bottoms of the guide assemblies are arranged on the lifting component, and the tops of the guide assemblies penetrate out of the fixing component. The downward pressing part is arranged above the fixing part and rotationally connected with the top of the guiding assembly. When the pressing part rotates and presses downwards, the filtering module is driven to move upwards through the guide assembly, the filtering module and the liquid diverter are communicated in a sealed mode to form a sealed channel, then the filtering function is achieved, particles in liquid are evenly distributed on the surface of the filtering module through the liquid diverter, no risk exists in particle extraction, and the filtering effect is good. Meanwhile, the filter membrane in the filter membrane clamp can be quickly replaced.

Description

Technical Field

[0001] The utility model relates to a clamp, in particular to a clamp for preparing filter membrane samples. Background Art

[0002] With the continuous advancement and development of science and technology, major automobile manufacturers and their supporting parts suppliers are paying more and more attention to the cleanliness of their products, which has further promoted the progress and improvement of cleanliness testing equipment.

[0003] At present, the filter membrane sample preparation clamps of cleanliness testing equipment on the market can be roughly divided into two categories: one is to open and close the clamp by pneumatic means. There are certain safety hazards in the operation process of opening and closing by pneumatic means, which is easy to injure the operator, and there is also the risk of accumulation of particles extracted by the clamp; the other is to open and close the clamp by using both hands at the same time. If the operator's hands are unevenly stressed at the same time, it is easy to cause the clamp to get stuck, making the operation inconvenient; in summary, in actual use, the above two methods cannot meet the use requirements. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a filter membrane sample preparation clamp, which has no risk in extracting particulate matter, is convenient to operate, and has no stuck phenomenon.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a filter membrane sample preparation fixture, comprising:

[0006] Fixed components, fixed on external equipment;

[0007] A liquid diverter is disposed on the fixed component;

[0008] A lifting component is arranged below the fixing component;

[0009] A filter module is arranged on the upper surface of the lifting component, and the filter module includes a plurality of filter membrane fixtures which are aligned up and down, and the filter membrane fixtures and the liquid diverter are arranged correspondingly up and down;

[0010] A guide assembly, wherein two guide assemblies are respectively arranged on both sides of the filter module, and the bottom of the guide assembly is arranged on the lifting component, and the top passes through the fixed component;

[0011] A pressing portion, disposed above the fixing component and rotatably connected to the top of the guide assembly;

[0012] When the pressing part rotates and presses downward, the pressing part drives the filter module on the lifting component to move upward through the guide assembly, and then the filter module and the liquid diverter in the fixed component are pressed against each other and communicated with each other in a sealed manner.

[0013] Furthermore, the filter membrane fixture comprises a fixture body; a filter membrane support plate for mounting the filter membrane is provided in the fixture body.

[0014] Furthermore, there are three filter membrane fixtures, and each filter membrane fixture is provided with an O-ring.

[0015] Furthermore, the guide assembly includes a guide column vertically arranged on the lifting component; a spring is arranged on the outer sleeve of the guide column; and the top of the guide column can slide up and down in the fixed component after passing through the guide sleeve located on the fixed component.

[0016] Furthermore, the pressing part includes:

[0017] Cam eccentric handles, the bottoms of the two cam eccentric handles are rotatably connected to the top of the guide assembly through positioning pins;

[0018] A connecting rod, both ends of which are connected to the cam eccentric handle, and the connecting rod is arranged parallel to the fixing component;

[0019] When the connecting rod is rotated and pressed downward, the connecting rod drives the guide assembly to move upward through the cam eccentric handle.

[0020] Furthermore, the filter module is arranged on the lifting component through a moving component; the moving component includes a pull-out plate located below the filter module; the pull-out plate is arranged on the lifting component so as to be laterally movable through two sliding bars.

[0021] Furthermore, limit pins are provided on both sides of the pull-out plate, and a front limit strip and a rear limit strip are provided on the upper surface of the lifting component at both sides of the limit pins.

[0022] Furthermore, a knurled screw is provided at the front end of the pull-out plate.

[0023] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0024] The utility model discloses a filter membrane sample preparation clamp, when the pressing part rotates and presses down, the filter module on the lifting component is driven to move up a certain distance through the guide component, and the filter module and the liquid diverter are closed and communicated with each other to form a sealed channel, and the liquid diverter enables the liquid to contact the entire surface of the filter module more evenly, so that the particles can be evenly distributed on the surface of the filter module, and there is no risk in extracting particulate matter, the safety factor is high, and the filtering effect is good. At the same time, the filter membrane in the filter membrane clamp can be quickly replaced through the pull-out plate, which is convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of a three-dimensional structure from another perspective;

[0028] Figure 3 It is a partial schematic diagram of an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a filter membrane fixture in one embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the use state of an embodiment of the utility model;

[0031] Among them: fixed component 1, liquid diverter 2, lifting component 3, filter module 4, guide assembly 5, pressing part 6, membrane clamp 40, guide column 50, spring 51, guide sleeve 52, positioning pin 53, cam eccentric handle 60, connecting rod 61, positioning pin 62, pull-out plate 80, sliding bar 81, limit pin 82, front limit bar 83, rear limit bar 84, knurled screw 85, clamp body 400, membrane support plate 401, sealing ring 402. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] The utility model provides a clamp for preparing filter membrane samples, so as to solve the problem that the prior art adopts a pneumatic method to open and close the clamp, which is easy to injure the operator, and there is also a risk of accumulation of particles extracted by the clamp; the other is a method of using both hands to operate at the same time, which is easy to cause the clamp to get stuck and inconvenient to operate.

[0034] For ease of understanding, the specific process in the embodiments of the present application is described below. Figure 1 to Figure 2 A filter membrane sample preparation fixture in the embodiment of the present application comprises a fixing component 1, a liquid diverter 2, a lifting component 3, a filter module 4, a guide assembly 5 and a pressing portion 6; the fixing component 1 is fixed on an external device and its position is fixed; the liquid diverter 2 is arranged on the fixing component 1 through-through; the lifting component 3 is arranged below the fixing component 1; the filter module 4 is arranged on the upper surface of the lifting component 3, the filter module 4 comprises a plurality of filter membrane fixtures 40 aligned up and down, and the filter membrane fixtures 40 are arranged correspondingly to the liquid diverter 2 up and down; the two guide assemblies 5 are respectively arranged on both sides of the filter module 4, and the bottom of the guide assembly 5 is arranged on the lifting component 3, and the top passes through the fixing component 1; the pressing portion 6 is arranged above the fixing component 1 and is connected to the top of the guide assembly 5.

[0035] According to the filter membrane sample preparation clamp of the utility model, when the pressing down part 6 is rotated and pressed down, the pressing down part 6 drives the filter module 4 on the lifting component 3 to move up a certain distance through the guide assembly 5, and then the filter module 4 and the liquid diverter 2 are pressed and closed to each other to form a filter channel to realize the filtering function, which is convenient and labor-saving to operate; in addition, the liquid diverter 2 can make the liquid contact the entire surface of the filter module more evenly, so that the particles can be evenly distributed on the surface of the filter module 4, and there is no risk in extracting particulate matter, with a high safety factor.

[0036] based on Figure 4 In this embodiment, the filter membrane fixture 40 includes a fixture body 400, and a filter membrane support plate 401 for loading the filter membrane is provided in the fixture body 400. The number of the filter membrane fixtures 40 in this embodiment is three, so that the liquid enters the three filter membrane fixtures 40 from the liquid diverter 2 and is quickly filtered to leave uniform particles; at the same time, in order to ensure the airtightness of the entire fixture, a sealing ring 402 is assembled at the bottom of the fixing component 1 and the three filter membrane fixtures 40.

[0037] Based on 1, in this embodiment, the guide assembly 5 includes a guide column 50 vertically arranged on the upper surface of the lifting component 3; a spring 51 is arranged on the outer sleeve of the guide column; the top of the guide column 50 passes through the guide sleeve 52 located in the fixed component 1 and can slide up and down in the fixed component 1; specifically, the two guide columns 50 are symmetrically arranged on both sides of the filter module 4, and the two guide columns 50 can slide up and down synchronously in the corresponding guide sleeves 52.

[0038] based on Figure 1 In this embodiment, the pressing portion 6 includes a connecting rod 61 and two cam eccentric handles 60; the bottom of the two cam eccentric handles 60 are rotatably connected to the top of the guide column 50 through a positioning pin 62; the two ends of the connecting rod 61 are vertically connected to the cam eccentric handles 60, and the connecting rod 61 is arranged parallel to the fixing component 1.

[0039] During operation, the two cam eccentric handles 60 are connected by a connecting rod 61 to achieve synchronous movement. When the cam eccentric handle 60 is rotated and pressed to the lowest position, the guide column 50 connected to the cam eccentric handles 60 on both sides will lift the lifting component 3 upward, and at the same time, the springs 51 on both sides are tightened, so that the entire clamp forms a closed channel to achieve the filtering function.

[0040] The two cam eccentric handles 60 are connected by a connecting rod 61 to achieve synchronous operation, which can avoid jamming caused by uneven force when the two cam eccentric handles 60 are opened or closed.

[0041] Furthermore, the filter module 4 is arranged on the lifting component 3 through a movable component; the movable component includes a pull-out plate 80 located below the filter module 4; the pull-out plate 80 is arranged on the lifting component 3 so as to be laterally movable through two sliding bars 81; in this way, when the filter membrane in the filter membrane fixture 40 needs to be replaced, it is only necessary to pull out the pull-out plate 80 laterally; here, in order to facilitate pulling out the pull-out plate 80, a knurled screw 85 is also provided at the front end of the pull-out plate, so as to conveniently replace the filter membrane in the filter membrane fixture 40.

[0042] At the same time, limit pins 82 are provided on both sides of the pull-out plate 80, and front limit bars 83 and rear limit bars 84 are provided on both sides of the limit pins 82 on the upper surface of the lifting component 3; the front limit bars 83 and the rear limit bars 84 limit the forward and backward movement range of the pull-out plate 85, and at the same time ensure that the pull-out plate 80 will not separate from the lifting component 3.

[0043] In order to better solve the risk of filter membrane particle accumulation and ensure the convenience of operation, the liquid diverter 2 in this clamp can evenly divert the liquid to the surface of the filter membrane; the liquid diverter 2 is equipped with a rotary quick-connect connector for external liquid, and the bottom interface of the pull-out plate 80 is connected to a gear pump. A negative pressure will be applied to the clamp at the bottom of the clamp. The negative pressure is provided by the gear pump, which can make the filter membrane close to the filter membrane support plate 401 to accelerate the liquid through the filter membrane, and the filtering effect is good.

[0044] The specific usage process is as follows:

[0045] based on Figures 1 to 5 First, pull the knurled screw 85 to pull out the pull-out plate 80, and the limit pin 82 and the front limit bar 83 are used to limit the pull-out plate 80. Then, place the clean filter membrane on the filter membrane support plate 401, and then push the pull-out plate 80 into the rear limit bar 84 for limiting the position.

[0046] When the operator rotates the connecting rod 61 and presses it downward to the lowest position, the guide column 50 connected to the eccentric handles 60 on both sides of the cam will drive the lifting component 3 to lift upward. At the same time, the springs 51 on both sides are tightened, and the three filter membrane clamps 40 are pressed against each other and clamped and sealed with the liquid diverter 2 up and down. In this way, the entire clamp forms a closed channel, that is, the liquid enters the three filter membrane clamps 40 from the liquid diverter 2, is filtered through the filter membrane, and is then discharged.

[0047] Among them, the liquid diverter 2 disrupts the original liquid flow trajectory, allowing the liquid to more evenly contact the entire surface of the filter membrane in the three filter membrane clamps 40, so that the particles can be evenly distributed on the surface of the filter membrane. The liquid flows internally through the liquid diverter 2 and the three filter membrane clamps 40, thereby achieving the filtering effect.

[0048] When the filter membrane needs to be replaced, the connecting rod 60 is rotated and pushed upward, and the spring 51 is in an expanded state, thereby expanding the fixing component 1 and the lifting component 3, and the knurled screw 85 is pulled to pull out the pull-out plate 80, so that the filter membrane in the filter membrane clamp can be replaced.

[0049] In summary, the filter membrane sample preparation clamp of the utility model can conveniently compress and seal the three filter membrane clamps and the liquid diverter through the connecting rod to form a filtering channel. It is easy to operate and has a high safety factor, no sticking phenomenon, and can easily replace the filter membrane, and is highly practical.

[0050] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A filter membrane sample preparation fixture, characterized in that: include: Fixed components, fixed on external equipment; A liquid diverter is disposed on the fixed component; A lifting component is arranged below the fixing component; A filter module is arranged on the upper surface of the lifting component, and the filter module includes a plurality of filter membrane fixtures which are aligned up and down, and the filter membrane fixtures and the liquid diverter are arranged correspondingly up and down; A guide assembly, wherein two guide assemblies are respectively arranged on both sides of the filter module, and the bottom of the guide assembly is arranged on the lifting component, and the top passes through the fixed component; A pressing portion, disposed above the fixing component and rotatably connected to the top of the guide assembly; When the pressing part rotates and presses downward, the pressing part drives the filter module on the lifting component to move upward through the guide assembly, and then the filter module and the liquid diverter in the fixed component are pressed against each other and communicated with each other in a sealed manner.

2. The filter membrane sample preparation fixture as claimed in claim 1, characterized in that: The filter membrane fixture comprises a fixture body; a filter membrane support plate for loading the filter membrane is arranged in the fixture body.

3. The filter membrane sample preparation fixture as claimed in claim 1, characterized in that: There are three filter membrane fixtures, and each filter membrane fixture is provided with an O-ring.

4. The filter membrane sample preparation fixture as claimed in claim 1, characterized in that: The guide assembly comprises a guide column vertically arranged on the lifting component; a spring is arranged on the outer sleeve of the guide column; and the top of the guide column can slide up and down in the fixed component after passing through the guide sleeve located on the fixed component.

5. The filter membrane sample preparation fixture according to claim 1, characterized in that: The pressing part comprises: Cam eccentric handles, the bottoms of the two cam eccentric handles are rotatably connected to the top of the guide assembly through positioning pins; A connecting rod, both ends of which are connected to the cam eccentric handle, and the connecting rod is arranged parallel to the fixing component; When the connecting rod is rotated and pressed downward, the connecting rod drives the guide assembly to move upward through the cam eccentric handle.

6. The filter membrane sample preparation fixture according to claim 1, characterized in that: The filter module is arranged on the lifting component through a moving assembly; the moving assembly comprises a pull-out plate located below the filter module; the pull-out plate is arranged on the lifting component so as to be laterally movable through two sliding bars.

7. The filter membrane sample preparation fixture according to claim 6, characterized in that: Limit pins are arranged on both sides of the pull-out plate, and a front limit strip and a rear limit strip are arranged on both sides of the limit pins on the upper surface of the lifting component.

8. The filter membrane sample preparation fixture according to claim 6, characterized in that: The front end of the pull-out plate is also provided with a knurled screw.

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