Filtering sample bottle
By designing a plunger structure in the filter sample bottle that matches the sealing ribs and sealing grooves, and by incorporating a built-in filter assembly, the problem of sample waste in existing filter sample bottles is solved, achieving more efficient sample filtration and more accurate test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-04-07
AI Technical Summary
Existing filtered sample bottles result in significant waste of sample liquid during sample processing, affecting the accuracy of test results.
A sample filter bottle was designed, including a bottle body, a plunger, a filter assembly, and a bottle cap. By setting a sealing rib at the bottom of the plunger to match the sealing groove on the inner wall of the bottle, the stagnation space is reduced. The filter assembly is set inside the plunger to ensure the seal between the plunger and the bottle body. The filter assembly is used to completely filter the sample into the plunger.
It reduces sample waste, improves the accuracy of test results, and has a simple structure that is easy to install and operate.
Smart Images
Figure CN224086776U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of experimental instrument technology, and in particular to a filter sample bottle. Background Technology
[0002] Before liquid chromatography testing, the sample to be tested needs to be filtered. Usually, a filter sample bottle is used to filter the sample. However, when processing the sample, some sample liquid that has not been filtered into the plunger space remains at the bottom of the existing filter sample bottle. For experimental analyses where the value of the filtered liquid is high or the number of filter sample bottles used is large, this waste is enormous and may also affect the test results, leading to inaccurate results. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of this application is to provide a filter sample bottle to solve the problem that existing filter sample bottles waste a lot of sample, which may affect the test results.
[0004] To achieve the above and other related objectives, this application provides a filtered sample bottle, comprising:
[0005] The bottle body has an inlet at the top and a sealing groove circumferentially formed along the inner wall at the bottom.
[0006] A plunger is movably disposed within the bottle body along the axial direction of the bottle body. The plunger can extend into or out of the bottle body from the filling inlet. The plunger has a sampling port at the end away from the bottle body and a filter hole at the end near the bottle body. The interior of the plunger is a hollow structure that connects the sampling port and the filter hole. A sealing rib is provided circumferentially along the bottom of the plunger, and the sealing rib matches the sealing groove.
[0007] A filter assembly is disposed within the plunger, the filter assembly comprising a filter element and a clamping element, the clamping element being used to press the filter element onto the filter hole;
[0008] A bottle cap is provided on the sampling port of the plunger for opening and closing the sampling port.
[0009] Optionally, the bottom of the plunger is provided with a boss structure along the inner wall circumferentially, the boss structure encloses to form the filter hole, the clamping member presses the filter element onto the boss structure, and the inner bottom wall of the bottle is provided with a frustum structure, the frustum structure matches the filter hole, the frustum structure extends into the filter hole and abuts against the filter element.
[0010] Optionally, the upper part of the clamping member is an inverted conical structure with an angle of 25-35° between the inverted conical structure and the plane, and the lower part is a planar structure that fits and contacts the filter element.
[0011] Optionally, the upper part of the clamping member is provided with a support rib for supporting the filter element.
[0012] Optionally, the filter element is configured as a single-layer filter membrane, a double-layer filter membrane, or a multi-layer filter membrane.
[0013] Optionally, the inner wall of the bottle cap is provided with a protruding structure along the circumference, and the plunger is provided with a first flange and a second flange on the outer wall near the sampling port. There is a gap between the first flange and the second flange. When the bottle cap is assembled with the bottle cap, the protruding structure is located between the first flange and the second flange.
[0014] Optionally, the plunger is further provided with a vent hole, which penetrates the outer wall of the plunger radially.
[0015] Optionally, the exhaust port is provided with multiple vents.
[0016] Optionally, the bottle cap is further provided with a sealing element, the bottle cap has an opening, and the sealing element is located between the opening and the sampling port.
[0017] Optionally, the seal is configured as a gasket.
[0018] In the sample filter provided in this application, the sample to be filtered is first added to the bottle body, and then the plunger is inserted into the bottle body through the inlet. The sealing rib at the bottom of the plunger forms a sealing surface with the inner wall of the bottle body. When the plunger extends into the bottom of the bottle body, the sealing rib matches the sealing groove at the bottom of the bottle body, forming a circular contact surface. The filter assembly is set inside the plunger and does not affect the fit between the plunger and the bottle body. Continuing to press the plunger ensures that the outer bottom wall of the plunger fits against the inner bottom wall of the bottle body, so as to squeeze the sample to the filter and filter it into the plunger through the filter assembly. This allows more sample to enter the plunger, reducing sample waste and improving the accuracy of test results. The structure is simple and easy to install and operate. The pressing component also serves as a flow channel for solution flow and to fix the filter component. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the filter sample bottle shown in Embodiment 1 of this application;
[0020] Figure 2 This is a cross-sectional view of the filter sample bottle shown in Embodiment 1 of this application;
[0021] Figure 3 This is a cross-sectional view of the plunger shown in Embodiment 1 of this application;
[0022] Figure 4 This is a cross-sectional view of the bottle shown in Embodiment 1 of this application;
[0023] Figure 5 This is a schematic diagram of the clamping component shown in Embodiment 1 of this application.
[0024] Part Number Explanation
[0025] 1-Bottle body; 2-Plunger; 3-Bottle cap; 4-Filter element; 5-Clamping element; 6-Sealing rib; 7-Boss structure; 8-Frustum structure; 9-First flange; 10-Second flange; 11-Raised structure; 12-Sealing element; 13-Vent hole; 14-Sampling port; 15-Filter hole; 16-Inlet; 17-Sealing groove; 18-Inverted conical structure; 19-Supporting rib. Detailed Implementation
[0026] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.
[0027] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this application, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "front," "back," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application.
[0028] It should be noted that existing filtration sample bottles typically have a filter membrane and a clamping device for fixing the filter membrane at the bottom of the plunger. That is, the filter membrane and clamping device are positioned between the plunger and the bottle body. These three components—the bottle body, plunger, and clamping device—work together to form a sealed filtration space. Typically, the clamping device is located in the space between the bottle body and the plunger. The compressed volume of this sealed space, i.e., the retention volume, is affected by product design, manufacturing errors, and assembly errors. First, in existing technology, the sealing structure on the outside of the plunger often leaves a distance from the bottom of the plunger, resulting in a large gap between the outer bottom wall of the plunger and the inner bottom wall of the bottle body, forming the first retention space for the filtrate. Second, due to manufacturing and assembly errors, the clamping device is difficult to align flush with the bottom plane of the plunger, thus creating a second retention space between the bottom of the plunger and the bottom of the bottle body. Furthermore, when sample filtration requirements are high and multiple layers are needed... The filtration process also increases the height difference between the clamping element and the bottom of the plunger, thus increasing the volume of the second retention space. Furthermore, the clamping element and the bottom of the bottle are fitted by a slightly tapered frustum. The clearance of this mating surface is affected by the dimensional tolerances and cylindricity of the three parts: the plunger, the clamping element, and the bottle. Additionally, in actual production, the front and back of the clamping element need to be distinguished; otherwise, a larger mating clearance will result, creating a third retention space. These three retention spaces increase the amount of filtered sample liquid retained in the bottle, leading to significant sample waste and potentially affecting test results. The filtered liquid needs to be extracted from the plunger using a syringe. The existing plunger bottom has a planar support structure; due to surface tension, some solution at the planar bottom cannot coalesce into individual droplets that cannot be collected by the syringe, further increasing sample waste.
[0029] Please see Figures 1 to 5 This application provides an exemplary sample filter bottle, comprising:
[0030] Bottle 1, with an inlet 16 at the top and a sealing groove 17 circumferentially formed along the inner wall at the bottom of the bottle 1;
[0031] The plunger 2 is movably disposed inside the bottle body 1 along the axial direction of the bottle body 1. The plunger 2 can extend into the bottle body 1 or move out of the bottle body 1 from the filling port 16. The plunger 2 has a sampling port 14 at the end away from the bottle body 1 and a filter hole 15 at the end near the bottle body 1. The interior of the plunger 2 is a hollow structure, which connects the sampling port 14 and the filter hole 15. The bottom of the plunger 2 is provided with a sealing rib 6 along the outer wall circumferentially, and the sealing rib 6 matches the sealing groove 17.
[0032] A filter assembly is disposed inside the plunger 2. The filter assembly includes a filter element 4 and a clamping element 5. The clamping element 5 is used to press the filter element 4 onto the filter hole 15.
[0033] The bottle cap 3 is set on the sampling port 14 of the plunger 2 and is used to open and close the sampling port 14.
[0034] In the filter sample bottle provided in this application, the filter sample is first added into the bottle body 1, and then the plunger 2 is inserted into the bottle body 1 through the inlet 16. The sealing rib 6 at the bottom of the plunger 2 forms a sealing surface with the inner wall of the bottle body 1. When the plunger 2 extends into the bottom of the bottle body 1, the sealing rib 6 matches the sealing groove 17 at the bottom of the bottle body 1, forming a circular contact surface. Through the close contact between the sealing rib 6 and the sealing groove 17, there will be no large gap between the outer bottom wall of the plunger 2 and the inner bottom wall of the bottle body 1, reducing the first retention space of the residual filter sample. At the same time, the filter assembly... The filter assembly is located inside the plunger 2 and does not affect the fit between the plunger 2 and the bottle 1. The filter assembly does not fit with the inner bottom wall of the bottle 1. It is only necessary to control the fit gap between the plunger 2 and the bottle 1, which eliminates the second and third retention spaces of the residual filtered sample. Continuing to press the plunger 2 can ensure that the outer bottom wall of the plunger 2 fits with the inner bottom wall of the bottle 1, so as to squeeze the filtered sample into the filter and filter it into the plunger 2 through the filter assembly. This allows more filtered sample to enter the plunger 2, reduces the waste of filtered sample, and improves the accuracy of test results.
[0035] In this embodiment, a boss structure 7 is provided circumferentially along the inner wall of the bottom of the plunger 2, forming a filter hole 15. The clamping member 5 presses the filter element 4 onto the boss structure 7. A frustum structure 8 is provided on the inner bottom wall of the bottle body 1, matching the filter hole 15. The frustum structure 8 extends into the filter hole 15 and abuts against the filter element 4. Specifically, the shape of the frustum structure 8 is the same as the shape of the filter hole 15, and the longitudinal cross-sectional area of the frustum structure 8 is also equal to the longitudinal cross-sectional area of the filter hole 15. The frustum structure 8 extends from the inner bottom wall of the bottle body 1 towards the filter hole 15. When the plunger 2 is assembled with the bottle body 1, the frustum structure 8 extends into the filter hole 15 until the frustum structure 8 is flush with the boss structure 7 to form the placement plane of the filter element 4. In actual assembly, it is only necessary to control the dimensional tolerances and cylindricity of the filter hole 15 of the plunger 2 and the frustum structure 8, which makes it easier to control the fitting accuracy, reduces the third retention space of the residual filter sample, and maximizes the filtration of the filter sample in the bottle body 1, thereby reducing the retention volume of the filter sample in the bottle body 1 and improving the filtration effect and the accuracy of the test results.
[0036] In some embodiments, the upper part of the clamping member 5 is an inverted conical structure 18, and the lower part is a planar structure that fits and contacts the filter member 4. Specifically, the angle between the inverted conical structure 18 and the planar surface is 25-35°. When extracting the filtered sample liquid from the plunger 2, a syringe is generally inserted through the sampling port 14 of the plunger 2 to extract the solution inside the plunger 2. The inverted conical structure 18 helps the solution to collect at the bottom of the plunger 2, preventing liquid droplets from forming on the planar support structure and remaining inside the plunger 2, thus preventing extraction. To further reduce sample waste, the flow channel of the plunger 2 near the clamping member 5 is tightened, meaning that the inner diameter of the plunger 2 near the clamping member 5 is smaller than the inner diameter of the upper part of the plunger 2. This enables rapid flow of liquid droplets and avoids liquid droplet retention. When the clamping member 5 and the plunger 2 are assembled, the side wall of the clamping member 5 and the inner side wall of the plunger 2 are sealed and fixed by interference fit of the dimensions. At the same time, a certain pre-tightening pressure is generated on the filter element 4, pressing the filter element 4 onto the filter hole 15.
[0037] In the above embodiment, the upper part of the clamping member 5 is provided with a support rib 19, which is part of the inverted conical structure 18 and is used to support the filter element 4, so as to prevent the filter element 4 from being subjected to large pressure and breaking.
[0038] In this embodiment, the filter element 4 is configured as a single-layer filter membrane, a double-layer filter membrane, or a multi-layer filter membrane. Since both the clamping element 5 and the filter element 4 are located inside the plunger 2, the increase in the filter membrane results in an increase in the thickness of the filter element 4, which has little impact on the internal volume of the plunger 2 and will not cause an increase in the second retention space between the plunger 2 and the bottle body 1. This can meet the filtration requirements of different filtration samples. The specific form of the filter element 4 is not limited here.
[0039] In some embodiments, the inner wall of the bottle cap 3 is provided with a circumferential protrusion structure 11, and the plunger 2 is provided with a first flange 9 and a second flange 10 on the outer wall near the sampling port 14. There is a gap between the first flange 9 and the second flange 10. When the bottle cap 3 is assembled with the plunger 2, the protrusion structure 11 is located between the first flange 9 and the second flange 10. Specifically, when the bottle cap 3 and the plunger 2 are assembled, the bottle cap 3 presses the sealing element 12 against the sampling port 14 of the plunger 2, and the protrusion structure 11 is stuck between the first flange 9 and the second flange 10 to limit the bottle cap 3 and prevent the bottle cap 3 from falling off after assembly.
[0040] In this embodiment, the plunger 2 is also provided with an exhaust hole 13. The exhaust hole 13 penetrates the outer wall of the plunger 2 radially. Specifically, multiple exhaust holes 13 are provided. The exhaust holes 13 are used to exhaust air when the filtered sample enters the plunger 2, so that the filtered sample can enter the plunger 2 more quickly.
[0041] In some embodiments, a sealing element 12 is also provided on the bottle cap 3. The bottle cap 3 has an opening, and the sealing element 12 is located between the opening and the sampling port 14. Specifically, the sealing element 12 is set as a sealing gasket, which seals the plunger 2 and can absorb the leaked filtered sample.
[0042] In summary, in the filter sample bottle provided in this application, the filter sample is first added into the bottle body 1, and then the plunger 2 is inserted into the bottle body 1 through the inlet 16. The sealing rib 6 at the bottom of the plunger 2 forms a sealing surface with the inner wall of the bottle body 1. When the plunger 2 extends into the bottom of the bottle body 1, the sealing rib 6 matches the sealing groove 17 at the bottom of the bottle body 1, forming a circular contact surface. Through the close contact between the sealing rib 6 and the sealing groove 17, there will be no large gap between the outer bottom wall of the plunger 2 and the inner bottom wall of the bottle body 1, reducing the first retention space of the residual filter sample. At the same time, the filter sample is filtered out. The filter assembly is located inside the plunger 2 and does not affect the fit between the plunger 2 and the bottle 1. The filter assembly does not fit with the inner bottom wall of the bottle 1. It is only necessary to control the fit gap between the plunger 2 and the bottle 1, which eliminates the second and third retention spaces of the residual filtered sample. Continuing to press the plunger 2 can ensure that the outer bottom wall of the plunger 2 fits with the inner bottom wall of the bottle 1, so as to squeeze the filtered sample into the filter and filter it into the plunger 2 through the filter assembly. This allows more filtered sample to enter the plunger 2, reduces the waste of filtered sample, and improves the accuracy of test results.
[0043] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.
Claims
1. A filter sample bottle, characterized in that, include: The bottle body has an inlet at the top and a sealing groove circumferentially formed along the inner wall at the bottom. A plunger is movably disposed within the bottle body along the axial direction of the bottle body. The plunger can extend into or out of the bottle body from the filling inlet. The plunger has a sampling port at the end away from the bottle body and a filter hole at the end near the bottle body. The interior of the plunger is a hollow structure that connects the sampling port and the filter hole. A sealing rib is provided circumferentially along the bottom of the plunger, and the sealing rib matches the sealing groove. A filter assembly is disposed within the plunger, the filter assembly comprising a filter element and a clamping element, the clamping element being used to press the filter element onto the filter hole; A bottle cap is provided on the sampling port of the plunger for opening and closing the sampling port.
2. The filter sample bottle according to claim 1, characterized in that, The bottom of the plunger is provided with a boss structure along the inner wall circumferentially, and the boss structure surrounds and forms the filter hole. The clamping member presses the filter element onto the boss structure. The inner bottom wall of the bottle is provided with a frustum structure, which matches the filter hole. The frustum structure extends into the filter hole and abuts against the filter element.
3. The filter sample bottle according to claim 1, characterized in that, The upper part of the clamping member is an inverted conical structure with an angle of 25-35° between the inverted conical structure and the plane, and the lower part is a planar structure that fits and contacts the filter element.
4. The filter sample bottle according to any one of claims 1-3, characterized in that, The upper part of the clamping member is provided with a support rib for supporting the filter element.
5. The filter sample bottle according to claim 4, characterized in that, The filter element is configured as a single-layer filter membrane, a double-layer filter membrane, or a multi-layer filter membrane.
6. The filter sample bottle according to any one of claims 1-3, characterized in that, The inner wall of the bottle cap is provided with a raised structure along the circumference. The plunger is provided with a first flange and a second flange on the outer wall near the sampling port. There is a gap between the first flange and the second flange. When the bottle cap is assembled with the bottle cap, the raised structure is located between the first flange and the second flange.
7. The filter sample bottle according to claim 6, characterized in that, The plunger is also provided with an exhaust port, which penetrates the outer wall of the plunger radially.
8. The filter sample bottle according to claim 7, characterized in that, The exhaust port is provided in multiple ways.
9. The filter sample bottle according to claim 1, characterized in that, The bottle cap is also provided with a sealing element, and the bottle cap has an opening, with the sealing element located between the opening and the sampling port.
10. The filter sample bottle according to claim 9, characterized in that, The sealing element is configured as a sealing gasket.