Suction filtration device convenient for directly and accurately collecting liquid sample

Abstract

The utility model provides a suction filtration device and a suction filtration method for separating liquid and solid samples in a laboratory, which are convenient for directly and accurately collecting liquid samples. The device comprises a funnel, a suction filtration cover, a sample bottle, a liftable platform, a fixing clamp, a sealing soft ring and a base, the funnel is located at the top of the suction filtration device, the funnel and the suction filtration cover are of a separable assembly structure, an exhaust opening is formed in the outer side of the top of the suction filtration cover, the sample bottle is arranged and located on the liftable platform, and the fixing clamp is arranged above the liftable platform and used for fixing the sample bottle. A sealing soft ring is additionally arranged at the bottom of the suction filtration cover. According to a traditional suction filtration device, liquid samples need to be transferred from a suction filtration bottle to a sample bottle, the suction filtration bottle needs to be frequently cleaned and dried during continuous operation, however, according to the suction filtration device, the liquid samples can be directly collected into the sample bottle, the next separation operation can be carried out by replacing a clean funnel and the sample bottle, the suction filtration separation and sample collection efficiency is improved, and the labor intensity is reduced. Meanwhile, pollution and loss caused in the sample transferring process are avoided.

Description

Technical Field

[0001] The invention belongs to the field of laboratory sample separation and collection equipment, and in particular relates to a suction filtration device which is convenient for directly and accurately collecting liquid samples. Background Art

[0002] When a traditional filtration device needs to perform multiple solid-liquid sample separation operations, it is necessary to frequently replace the filtration bottles. When the number of filtration bottles is insufficient, the filtration bottles must be cleaned and dried multiple times, resulting in complicated operations, long time consumption, and low efficiency. In addition, the process of transferring the liquid sample from the filtration bottle to the sample bottle is prone to loss and pollution. The present invention eliminates the process of transferring the liquid sample from the filtration bottle to the sample bottle, which can not only avoid the loss of the sample due to wall adhesion, but also eliminate the risk of pollution in the transfer process. Especially in the process of filtration separation, the liquid sample can be directly collected into the sample bottle accurately and quickly, which is very important for samples with small quantity, high viscosity, high cleanliness requirements and volatile samples, and can ensure the integrity of the sample and the accuracy of the experimental data. Summary of the invention

[0003] In view of the problems in the existing laboratory liquid-solid sample separation process, such as the need to frequently replace suction filtration bottles, the need to transfer liquid samples again, and the risk of loss and contamination of liquid samples, the present invention proposes a suction filtration device that is convenient for directly and accurately collecting liquid samples. The device changes the traditional thinking from replacing suction filtration bottles to directly replacing sample bottles, so that liquid samples can be directly collected into sample bottles, reducing the complexity of operation and avoiding loss and contamination in the filtrate transfer process.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is a filtration device which is convenient for directly and accurately collecting liquid samples, including a funnel, a filtration cover, a sample bottle, a lifting platform, a fixing clamp, a sealing soft ring, and a base. The funnel is located above the filtration cover, and the funnel and the filtration cover are a detachable assembly structure. An air suction port is arranged on the outer side of the top of the filtration cover, and a sample bottle is also arranged inside. The sample bottle is placed on the lifting platform, and a lower extension tube of the funnel extends into the sample bottle. A fixing clamp is arranged above the lifting platform for fixing the sample bottle, and a sealing soft ring is installed at the lower end of the filtration cover.

[0005] Furthermore, the suction filtration cover and the funnel are detachable assembly structures and are assembled and sealed by a rubber stopper or a frosted port.

[0006] Furthermore, the suction filtration cover is made of tempered glass, organic glass or quartz, a hard and transparent material, and the suction filtration cover can withstand a negative pressure condition of -0.1 MPa.

[0007] Furthermore, the lower extension tube of the funnel directly penetrates into the sample bottle in the suction filtration cover to achieve direct and accurate collection of liquid samples. The lower extension tube of the funnel has a length of 10-20 cm and a diameter of 10-15 mm.

[0008] Furthermore, the filtration cover and the base are detachable assembly structures. During the filtration process, the two are automatically sealed and assembled through a sealing soft ring due to the negative pressure environment in the filtration system. After the filtration is completed, the filtration cover and the base can be naturally separated.

[0009] Furthermore, the sealing soft ring is made of silicone or rubber material, preferably silicone material.

[0010] Furthermore, the thickness of the sealing soft ring is 2-10 mm, and preferably, the thickness of the sealing soft ring is 5 mm.

[0011] Furthermore, in the filtration cover, a lifting platform is arranged on the base, so that the height of the sample bottle can be flexibly adjusted.

[0012] Furthermore, the sealing surface of the base is a smooth plane, and the material is tempered glass, organic glass, quartz glass, plastic, or metal.

[0013] Beneficial technical effects of the present invention:

[0014] The present invention solves the problem that when a traditional suction filtration device needs to perform multiple solid-liquid sample separation operations, the suction filtration bottle needs to be frequently replaced. When the number of suction filtration bottles is insufficient, the suction filtration bottles must be cleaned and dried for many times, resulting in complex operation, long time consumption, low efficiency, loss and pollution in the sample transfer process, etc. The present invention realizes the rapid replacement of the sample bottle and the funnel through the detachable assembly structure of the funnel and the suction filtration cover, the self-sealing assembly of the suction filtration cover and the base, the flexible adjustment of the sample bottle height, and the direct extension of the lower extension tube of the funnel into the sample bottle, etc., and the operation of directly collecting the liquid sample into the sample bottle. For the situation where multiple liquid-solid samples need continuous suction filtration operations, not only is the operation simple, time-consuming, and efficient, but there is no loss of the sample due to sticking to the wall during the process of transferring the liquid sample from the suction filtration bottle to the sample bottle again, and the risk of pollution in the transfer process is eliminated. The liquid sample is directly collected into the sample bottle accurately and quickly, which significantly improves the integrity of the sample and the accuracy of the experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Reference numerals: 1- funnel, 2- sand core or baffle with holes, 3- rubber stopper or frosted port, 4- air suction port, 5- fixing clamp, 6- lifting platform, 7- sample bottle, 8- suction cover, 9- sealing soft ring, 10- base DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through preferred embodiments.

[0018] like Figure 1 As shown, a filtration device for separating and treating laboratory liquid-solid samples provided in this embodiment includes a funnel 1, and the funnel 1 is located on the top of a filtration cover 8, and the two are assembled and sealed by a rubber stopper or a frosted mouth. An air suction port 4 is arranged on the outer side of the top of the filtration cover 8, and a sample bottle 7 is arranged in the filtration cover 8. The sample bottle 7 is placed on a lifting platform 6. The lifting platform is adjusted so that the lower extension tube of the funnel 1 extends into the sample bottle. A fixing clamp 5 is arranged on the top surface of the lifting platform 6. The filtration cover 8 is placed on a base 10, and the sealing assembly is completed by a sealing soft ring 10.

[0019] In this embodiment, the funnel 1 is a Buchner funnel or a sand core funnel with a diameter of 60 mm, the sample bottle 7 has a volume of 100 mL and a diameter of 40 mm, and the filtration cover 8 has a length of 350 mm.

[0020] In this embodiment, the sealing soft ring 9 is made of silicone or rubber material, preferably silicone material; the thickness of the sealing soft ring 9 is 2-10 mm, preferably, the thickness of the sealing soft ring is 5 mm.

[0021] Step 1: First, according to the device Figure 1 Assemble the suction filtration separation device, fix the sample bottle on the lifting platform 6, and adjust the height of the lifting platform so that the lower extension tube of the funnel is placed 1-2 cm below the mouth of the sample bottle;

[0022] Step 2: The funnel 1 and the suction filter cover 8 are assembled by sealing with a rubber plug, and the suction filter cover 8 and the base 10 are assembled by sealing with a sealing soft ring;

[0023] Step 3: Place filter paper with the required pore size in the funnel 1, then pour the liquid-solid mixed sample into the top funnel 1, and connect the suction port 4 on the top outer side of the suction cover 8 to the suction pump;

[0024] Step 4: Turn on the vacuum pump to put the filtration system under negative pressure. The liquid sample flows directly into the sample bottle 7 through the lower extension tube of the funnel 1 to be collected, and the solid sample is retained in the funnel 1 to achieve liquid-solid separation and separate collection;

[0025] Step 5: After the filtration is completed, the filtration system is restored to normal pressure, and the filtration cover 8 and the base 10 lose their sealing fit. The filtration cover 8 can be removed. Before the next solid-liquid sample separation, replace the clean funnel 1 and the sample bottle 7 to directly carry out the next sample separation and collection operation.

[0026] The laboratory liquid-solid sample separation and processing filtration device of this embodiment is used for directly and accurately collecting laboratory liquid samples.

[0027] The above description is a preferred embodiment of the present invention, which is used to explain the technical solution of the present invention. Those skilled in the art can also make routine modifications, equivalent substitutions and improvements within the spirit and principles of the present invention.

Claims

1. A suction filtration device for directly and accurately collecting liquid samples, comprising a funnel, a suction filtration cover, a sample bottle, a lifting platform, a fixing clamp, a sealing soft ring, and a base, characterized in that: In the filtration device, the funnel is located at the top, and the funnel and the filtration cover are detachable assembly structures. An air suction port is provided on the outer side of the top of the filtration cover, and a lifting platform is provided inside; the sample bottle is placed on the lifting platform, and the lower extension tube of the funnel extends into the sample bottle. A fixing clamp is provided on the lifting platform to fix the sample bottle. A sealing soft ring is installed at the bottom of the filtration cover, and the negative pressure condition makes the filtration cover and the base fit tightly together to achieve sealing.

2. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: The funnel and the suction filter cover are assembled by a rubber plug or a frosted mouth seal, so that the funnel can be quickly replaced. The funnel is a common Büchner funnel or a sand core funnel, and the suction filter cover is tempered glass, organic glass or quartz. The suction filter cover can withstand at least -0.1MPa negative pressure conditions.

3. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: The lower extension tube of the funnel directly penetrates into the sample bottle in the suction filter cover to realize direct and accurate collection of liquid samples. The lower extension tube of the funnel has a length of 10-20 cm and a diameter of 10-15 mm.

4. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: The filtration cover and the base are detachable assembly structures. During the filtration process, the two are automatically sealed and assembled through a sealing soft ring due to the negative pressure environment in the filtration system. After the filtration is completed, the pressure is released and the filtration cover and the base are naturally separated, so that the sample bottle can be quickly replaced.

5. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: Inside the filtration hood, a lifting platform is placed on the base to achieve flexible adjustment of the height of the sample bottle.

6. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: The sealing soft ring is made of silicone or rubber, and the thickness of the sealing soft ring is 2-10mm.

7. A suction filtration device for directly and accurately collecting liquid samples according to claim 1, characterized in that: The sealing surface of the base is a smooth plane, and the material is tempered glass, organic glass, quartz, plastic, or metal.

Images