Buchner funnel
By integrating thermal resistance and thermal sensor in the Breakh funnel and combining the structure of the bend flow part, the filter cloth blockage problem caused by the temperature reduction of the hot solution is solved, and the controllable temperature and the improvement of the filtration effect are achieved.
Patent Information
- Application Number
- CN202323384955.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-12
AI Technical Summary
During the filtration process, the hot solution crystallizes abnormally due to the decrease in temperature, resulting in blockage of the filter cloth, affecting the filtration effect, especially when the ambient temperature and the material liquid temperature are large.
A temperature-adjustable Brecht funnel is designed. By integrating a thermal resistance and thermal sensor into the funnel, combining a bend flow part and a flow-sharing plate structure, the temperature is controlled and heat loss is reduced to avoid solution cooling.
It effectively avoids crystallization and filter cloth blockage caused by temperature changes, ensures the smooth progress of the filtration process, and improves the filtration effect.
Smart Images
Figure CN222173251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of filtering equipment, in particular to a temperature-adjustable Buchner funnel. Background Art
[0002] During the research and experiment, it is often necessary to filter the liquid materials. Some liquid materials need to be kept within certain specific temperature ranges to complete the filtering operation well. In the actual operation, due to the large temperature difference between the ambient temperature and the liquid temperature, the liquid temperature drops rapidly during the filtration process, resulting in the failure to meet the temperature parameters during the filtration process. In particular, for solutions containing solutes with a large gap between solubility and temperature, crystals will precipitate after the temperature is lowered, which is particularly easy to block the pores of the filter cloth (paper), resulting in the inability to complete the filtration operation smoothly.
[0003] The products synthesized in the laboratory need to be further purified to remove impurities. The synthetic products are often dissolved and then hot filtered by taking advantage of the large difference in solubility at different temperatures. When the hot solution is filtered through a funnel, because the temperature of the funnel is consistent with the ambient temperature, the funnel is heated in an oven before filtering. However, the problem of sodium alcohol crystallization due to the cooling of the funnel still cannot be solved, which leads to clogging of the filter cloth and makes filtration difficult. Summary of the invention
[0004] The utility model aims to provide a temperature-controllable Buchner funnel to avoid abnormal crystallization caused by cooling of hot solution during filtration, which is specifically achieved by the following technical solutions:
[0005] A Buchner funnel comprises a funnel body and a tube body connected to the lower part of the funnel body, the upper part of which is provided with an open edge, the lower part of the funnel body is provided with a filter plate for laying filter paper, and the outer wall of the funnel body is provided with a thermal resistor.
[0006] The Buchner funnel is further designed in that a thermal sensor is built into the funnel body.
[0007] The Buchner funnel is further designed in that a meandering portion is placed inside the funnel through the open portion of the funnel body, the meandering portion has a cylinder body, the cylinder body is attached to the inner wall of the funnel body, and partitions of different heights and not completely opposite are arranged inside the cylinder body, thereby forming a tortuous channel in the meandering portion that connects the external space of the funnel body with the internal space of the funnel body.
[0008] The Buchner funnel is further designed in that the upper portion of the cylinder is folded outward to form a folded portion, and the cylinder is hung on the upper edge of the funnel body via the folded portion.
[0009] The Buchner funnel is further designed in that an annular plate with a through hole in the middle is provided in the cylinder, and a baffle is located below the annular plate and opposite to the through hole of the annular plate, and the diameter of the baffle is larger than the diameter of the through hole of the annular plate and smaller than the inner diameter of the cylinder.
[0010] The Buchner funnel is further designed in that a flow equalizing plate is provided inside the cylinder below the baffle, and the flow equalizing plate has a plurality of flow equalizing holes evenly distributed thereon.
[0011] The Buchner funnel is further designed in that the bottom of the cylinder touches the edge of the filter plate.
[0012] The beneficial effects of the utility model are:
[0013] Compared with ordinary Büchner funnels, the utility model provides a thermal resistor, so that the temperature-adjustable Büchner funnel can reduce the crystallization caused by temperature, the increase of liquid viscosity or the decrease of surface activity of solid particles that affect the filtering effect when performing separation processes such as filtration and suction filtration; a detachable meandering part is provided in the Büchner funnel, so that the air inside and outside the funnel body flows in a tortuous way, and the heat dissipation of the air is reduced. In particular, the heat conduction effect makes the meandering part have a certain temperature. When the suction operation causes the liquid level to drop and form a local negative pressure, the air sucked into the funnel body is heated up through the meandering part, thereby preventing the hot solution in the funnel body from cooling down; the bottom of the cylinder of the meandering part can be pressed on the filter paper located on the filter plate, so as to prevent the solution from bypassing the filter paper and going down from the edge of the filter paper. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the external structure of an embodiment of the utility model.
[0015] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the utility model.
[0016] Figure 3 It is a schematic diagram of the internal structure of another embodiment.
[0017] Figure 4 Schematic diagram of the back structure of the baffle in the embodiment. DETAILED DESCRIPTION
[0018] The present invention is further described below with reference to the accompanying drawings and embodiments:
[0019] A Buchner funnel comprises a funnel body 1 and a tube body 2 connected to the lower part of the funnel body, the upper part of which has an open edge, the lower part of which is provided with a filter plate 3 for laying filter paper, and the outer wall of the funnel body is provided with a thermal resistor 4.
[0020] The bucket body 1 is equipped with a thermal sensor, which outputs the temperature data inside the bucket body, so as to control the working voltage of the thermal resistor and ensure the appropriate temperature. Of course, the data of the thermal sensor can also be read by the controller to automatically adjust the working voltage of the thermal resistor; or the corresponding relationship between the working voltage and temperature can be recorded experimentally when the Büchner funnel of this structure is used for filtration operations of different hot solutions, and a fixed voltage can be directly used.
[0021] The bucket body 1 is provided with a meandering portion 4 located inside the bucket body through the open portion, and the meandering portion has a cylinder 41, and the cylinder is attached to the inner wall of the bucket body. The cylinder is provided with partitions of different heights and not completely opposite to each other, so as to form a meandering channel 42 in the meandering portion that connects the outer space of the bucket body with the inner space of the bucket body. Before placing the filter paper, the meandering portion is first preheated. During the filtration, the hot solution entering the bucket body first passes through the meandering portion, and the meandering portion absorbs the heat of the bucket body; the outside normal temperature air entering the bucket body needs to pass through the meandering portion to be heated, thereby reducing the liquid surface of the hot solution in the bucket body from dissipating heat into the air.
[0022] Specifically, the cylinder is provided with an annular plate 43 with a through hole in the middle, and a baffle 44 located below the annular plate and opposite to the through hole of the annular plate, the diameter of the baffle being larger than the diameter of the through hole of the annular plate and smaller than the inner diameter of the cylinder. The baffle is connected to the inner wall of the cylinder through a lifting rod 45, and in order to increase the temperature of the baffle, a heat-conducting metal wire 46 is provided on the bottom surface of the baffle and in the lifting rod, thereby enhancing the efficiency of the lifting rod in transferring heat from the bucket body to the baffle.
[0023] Due to the restriction of the meandering portion on the hot solution flow path, in order to avoid uneven distribution of the hot solution, a flow equalizing plate 5 is provided inside the cylinder below the baffle, and the flow equalizing plate has a plurality of flow equalizing holes evenly distributed thereon.
[0024] The upper part of the cylinder 41 is folded outward to form a folded portion, and the cylinder is hung on the upper edge of the bucket body through the folded portion. The bottom of the cylinder 41 touches the edge of the filter plate, and after the meandering part is placed in the bucket body, the filter paper can be appropriately pressed to prevent the hot solution from flowing out from the edge of the filter paper without being filtered.
Claims
1. A Buchner funnel, comprising a funnel body and a tube body connected to the lower part of the funnel body, the upper part of which has an open edge, and the lower part of the funnel body is provided with a filter plate for laying filter paper, characterized in that: A thermal resistor is arranged on the outer wall of the bucket body; a thermal sensor is arranged inside the bucket body; a meandering portion is placed inside the bucket body through the open portion of the bucket body, the meandering portion has a cylinder body, the cylinder body is attached to the inner wall of the bucket body, partitions of different heights and not completely opposite are arranged inside the cylinder body, thereby forming a tortuous passage connecting the external space of the bucket body with the internal space of the bucket body in the meandering portion.
2. The Buchner funnel according to claim 1, characterized in that: The upper part of the cylinder is folded outward to form a folded portion, and the cylinder is hung on the upper end edge of the bucket body via the folded portion.
3. The Buchner funnel according to claim 1, characterized in that: The cylinder is provided with an annular plate with a through hole in the middle, and a baffle plate located below the annular plate and opposite to the through hole of the annular plate. The diameter of the baffle plate is larger than the diameter of the through hole of the annular plate and smaller than the inner diameter of the cylinder.
4. The Buchner funnel according to claim 3, characterized in that: A flow balancing plate located below the baffle is arranged inside the cylinder, and the flow balancing plate is evenly distributed with a plurality of flow balancing holes.
5. The Buchner funnel according to claim 1, characterized in that: The bottom of the cylinder touches the edge of the filter plate.