Leakage-proof Soxhlet fat extraction device

Abstract

The utility model provides an anti-leakage Soxhlet fat extraction device, which solves the problems that the conventional Soxhlet fat extraction device is easy to leak and a solvent is not recovered in time when being used for extracting fat. Comprising a condenser pipe, an extractor and an extraction bottle which are sequentially connected from top to bottom, and a siphon and a gas guide pipe are arranged on two sides of the extractor; the siphon comprises a low-position pipe and a high-position pipe which are in threaded connection, a first filter screen is arranged on the low-position pipe, threaded sections are arranged on the inner wall of the low-position pipe and the surface of the high-position pipe, and a second filter screen is arranged at a liquid outlet of the high-position pipe; and a piston assembly is arranged on the siphon. The Soxhlet extraction device is widely applied to the technical field of Soxhlet extraction devices.

Description

Technical Field

[0001] The present application relates to the technical field of Soxhlet extraction devices, and more specifically, to a leakage-proof fat Soxhlet extraction device. Background Art

[0002] Fat content is an important indicator of food, grains or oil. Fat can be dissolved in a specific organic solvent and separated after repeated extraction. The fat content is calculated by drying and weighing. Fat is mainly extracted by Soxhlet extraction. Soxhlet extraction is a common method for extraction and purification in the biological and chemical industries. The equipment used is a Soxhlet extractor, which includes an extraction bottle, an extractor and a condenser. There are siphons and air guides on both sides of the extractor. The solid matter in the extractor is repeatedly extracted by solvents by using the principle of solvent reflux and siphon. It is widely used to extract fat and other lipid compounds from solid matter.

[0003] The process of extracting fat with a Soxhlet extractor is usually as follows: before extraction, the solid lipid sample to be tested is crushed, placed in a cylinder made of defatted filter paper, and then placed in the middle of the extractor. The condenser is fixed above the extractor, and the extraction solvent is added to the extraction bottle. The extractor is installed on the extraction bottle, and the extraction bottle is heated in a water bath to start extraction.

[0004] At present, during the fat extraction process, when the solid sample is too fine, it will be flushed out of the degreasing filter paper cylinder by petroleum ether and enter the extraction bottle through the siphon, causing leakage and affecting the extraction effect; at the end of the extraction, if the petroleum ether is not recovered in time, it will flow into the water bath heating device and evaporate into the air to cause pollution. The above problems have not been effectively solved at present, and the existing Soxhlet extraction device cannot meet the increasing extraction needs of lipid compounds. Utility Model Content

[0005] In order to solve the above existing problems, the technical solution adopted by the utility model is: to provide a leakage-proof fat rope extraction device, which solves the problems of easy leakage and untimely recovery of the existing fat rope extraction device, including a condenser, an extractor and an extraction bottle connected in sequence from top to bottom, and a siphon and an air guide tube are arranged on both sides of the extractor;

[0006] The siphon comprises a low-position pipe and a high-position pipe connected by threads, wherein the inner wall of the low-position pipe and the surface of the high-position pipe are provided with threaded sections; a first filter is provided on the low-position pipe, and a second filter is provided at the liquid outlet of the high-position pipe; and a piston assembly is provided on the siphon.

[0007] Preferably, a first threaded section is provided between the low-level pipe liquid inlet and the first filter screen, and a second threaded section is provided from the high-level pipe liquid outlet toward the high-level pipe liquid inlet. The first threaded section cooperates with the second threaded section to make the first filter screen abut against the second filter screen.

[0008] Preferably, a double-layer bayonet is provided on the low-position pipe, the first filter is arranged in the middle of the double-layer bayonet, and the double-layer bayonet is detachably connected to the upper and lower low-position pipes.

[0009] Preferably, a drainage tube with a valve is provided on the siphon tube, a liquid outlet of the drainage tube is connected to a recovery device for recovering the organic solvent, and a liquid inlet of the drainage tube is arranged above the piston assembly.

[0010] Preferably, the first filter screen is a PTFE hydrophobic membrane, and the second filter screen is a coarse filter screen.

[0011] Preferably, the air guide tube is arranged on the upper side wall of the extractor, and the siphon tube is arranged on the lower side wall of the extractor.

[0012] Preferably, a water bath heater is provided below the extraction bottle.

[0013] Preferably, two sealing sleeves are provided on the extractor, one sealing sleeve is provided at the connection between the extractor and the extraction bottle, and the other sealing sleeve is provided at the connection between the extractor and the condenser.

[0014] The beneficial effects of the utility model are as follows: by arranging the first filter screen and the second filter screen on the siphon tube, the organic solvent is filtered in layers to prevent the solid sample from entering the extraction bottle along with the organic solvent when it is too fine, effectively preventing leakage, avoiding repeated experiments, and improving the extraction quality and extraction efficiency; a piston assembly is provided on the siphon tube, and when the extraction is completed and the organic solvent needs to be recovered, the piston assembly is closed to prevent the organic solvent from flowing into the extraction bottle again, thereby improving the recovery rate of the organic solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0018] Explanation of symbols in the figure: 1. Condenser; 2. Extractor; 3. Extraction bottle; 4. Siphon; 41. Low-level pipe; 42. High-level pipe; 5. Air guide pipe; 6. First filter; 7. Second filter; 8. Piston assembly; 9. Double-layer bayonet; 10. Valve; 11. Drainage tube; 12. Recycler. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] A leakage-proof fat rope extraction device provided in an embodiment of the present application is now described.

[0023] See also Figure 1 , which is a schematic diagram of the structure of the utility model, a leakage-proof fat rope extraction device comprises a condenser 1, an extractor 2 and an extraction bottle 3 connected in sequence from top to bottom, a water bath heater (not shown in the figure) is arranged below the extraction bottle 3; siphon tubes 4 and air guide tubes 5 are arranged on both sides of the extractor 2, the air guide tubes 5 are arranged on the upper side wall of the extractor 2, and the siphon tubes 4 are arranged on the lower side wall of the extractor 2, the solvent is heated by the water bath in the extraction bottle 3 and then vaporized, enters the upper side of the extractor 2 through the air guide tube 5, condenses and falls at the condenser 1, extracts the lipid solid sample to be tested in the extractor 2, and then enters the extraction bottle 3 again through the siphon tube 4 on the lower side of the extractor 2.

[0024] See also Figure 1 and Figure 2 The siphon tube 4 includes a low-level tube 41 and a high-level tube 42 which are threadedly connected. The inner wall of the low-level tube 41 and the surface of the high-level tube 42 are provided with threaded sections, and the high-level tube 42 is screwed into the low-level tube 41; a first filter screen 6 is provided on the low-level tube 41, and a second filter screen 7 is provided at the liquid outlet of the high-level tube 42 for performing hierarchical filtering of the solvent.

[0025] Specifically, a first threaded section is provided between the liquid inlet of the low-level tube 41 and the first filter 6, and a second threaded section is provided from the liquid outlet of the high-level tube 42 in the direction of the liquid inlet of the high-level tube 42. The first threaded section cooperates with the second threaded section to ensure the airtightness in the siphon tube 4 and is used to make the first filter 6 abut against the second filter 7. When there are too many solid samples entrained in the organic solvent, the solvent passes through the first filter 6 at a slow speed, affecting the extraction efficiency. At this time, the staff rotates the high-level tube 42 to slightly press the second filter 7 downward, squeezing the solvent through the first filter 6 to increase the filtration speed and ensure the extraction efficiency.

[0026] Specifically, the first filter screen 6 is a PTFE hydrophobic membrane, and the second filter screen 7 is a coarse filter screen. The coarse filter screen is used to filter larger solid sample particles, and the PTFE hydrophobic membrane is used to filter smaller solid sample powders.

[0027] Furthermore, a double-layer bayonet 9 is provided on the low-level tube 41, and the first filter screen 6 is arranged in the middle of the double-layer bayonet 9. The double-layer bayonet 9 is detachably connected to the upper and lower low-level tubes 41 by means of threaded connection and the like. When too many solid samples are filtered, the first filter screen 6 needs to be replaced, and the double-layer bayonet 9 can be detached to take out the first filter screen 6. The operation is convenient, and the double-layer bayonet 9 can be detached for cleaning and the first filter screen 6 can be replaced, thereby improving the accuracy of the extraction result. The double-layer bayonet 9 can be made of polytetrafluoroethylene material with high corrosion resistance.

[0028] The siphon tube 41 is provided with a piston assembly 8. During normal extraction, the piston assembly 8 is opened to allow the organic solvent to circulate. When the extraction is finished, the piston assembly 8 is closed to prevent the organic solvent from entering the extraction bottle 3 again.

[0029] Furthermore, a drainage tube 11 with a valve 10 is provided on the siphon tube 4, and the liquid outlet of the drainage tube 11 is connected to a recovery device 12 for recovering the organic solvent, and the liquid inlet of the drainage tube 11 is arranged above the piston assembly 8; during normal extraction, the piston assembly 8 is opened, the valve 10 is closed, and the organic solvent circulates through the siphon tube 4. At the end of the extraction, the organic solvent needs to be recovered, the piston assembly 8 is closed, the valve 10 is opened, and the organic solvent enters the recovery device 12, thereby improving the recovery rate of the organic solvent.

[0030] Furthermore, two sealing sleeves (not shown in the figure) are provided on the extractor 2, one sealing sleeve is provided at the connection between the extractor 2 and the extraction bottle 3, and the other sealing sleeve is provided at the connection between the extractor 2 and the condenser 1, thereby ensuring the airtightness of the Roxotype extraction device.

[0031] The method of using the utility model is as follows: before extraction, first grind the solid sample to be tested, wrap it in a defatted filter paper bag, put it into the extractor 2, add petroleum ether and other organic solvents into the extraction bottle 3, heat the extraction bottle 3 in a water bath, gasify the organic solvent, rise from the air guide pipe 5 into the upper side of the extractor 2, condense and fall at the condenser 1, extract the lipid solid sample to be tested in the extractor 2, and wait for the organic solvent liquid level in the extractor 2 to reach a certain height, and enter the extraction bottle 3 again through the siphon 4 at the lower side of the extractor 2, the organic solvent in the extraction bottle 3 continues to be heated, gasified, rise, condensed, and dripped into the extractor 2, and the cycle is repeated until the extraction is complete, and the staff calculates the fat content through the extraction data. When the extraction is completed, the staff closes the piston assembly 8, opens the valve 10, and the organic solvent enters the recovery device 12.

[0032] In the utility model, by setting the first filter screen 6 and the second filter screen 7 on the siphon tube 4, the organic solvent is filtered in layers to prevent the solid sample from entering the extraction bottle 3 with the organic solvent when it is too fine, effectively preventing leakage, avoiding repeated experiments, and improving the extraction quality and extraction efficiency; the siphon tube 4 is provided with a piston assembly 8. When the extraction is completed and the organic solvent needs to be recovered, the piston assembly 8 is closed to prevent the organic solvent from flowing into the extraction bottle 3 again, thereby improving the recovery rate of the organic solvent. The double-layer bayonet 9 is detachable for cleaning and the first filter screen 6 is replaceable, which improves the accuracy of the extraction result. The sealing sleeve is respectively arranged at the connection between the extractor 2 and the extraction bottle 3 and the connection between the extractor 2 and the condenser 1 to ensure the airtightness of the rope-type extraction device.

[0033] The above-mentioned specific implementation methods do not cover the entire protection scope of the utility model. Modifications or equivalent replacements of the utility model should all fall within the patent coverage requirements of the utility model. In the utility model, the above-mentioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it; although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above-mentioned embodiments, or replace some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A fat rope-type extraction device that prevents leakage, comprising a condenser (1), an extractor (2) and an extraction bottle (3) connected in sequence from top to bottom, wherein a siphon (4) and an air guide tube (5) are provided on both sides of the extractor (2); the characteristics are: The siphon pipe (4) comprises a low-position pipe (41) and a high-position pipe (42) which are threadedly connected, the inner wall of the low-position pipe (41) and the surface of the high-position pipe (42) being provided with threaded sections; a first filter screen (6) is provided on the low-position pipe (41), and a second filter screen (7) is provided at the liquid outlet of the high-position pipe (42); and a piston assembly (8) is provided on the siphon pipe (4).

2. A leakage-proof fat extraction device as claimed in claim 1, characterized in that: A first threaded section is provided between the liquid inlet of the low-position pipe (41) and the first filter screen (6), and a second threaded section is provided from the liquid outlet of the high-position pipe (42) in the direction of the liquid inlet of the high-position pipe (42), and the first threaded section cooperates with the second threaded section to enable the first filter screen (6) to abut against the second filter screen (7).

3. A leakage-proof fat extraction device as claimed in claim 1, characterized in that: The low-position pipe (41) is provided with a double-layer bayonet (9), the first filter screen (6) is arranged in the middle of the double-layer bayonet (9), and the double-layer bayonet (9) is detachably connected to the upper and lower low-position pipes (41).

4. A leakage-proof fat extraction device as claimed in claim 1, characterized in that: The siphon tube (4) is provided with a drainage tube (11) with a valve (10); the liquid outlet of the drainage tube (11) is connected to a recovery device (12) for recovering the organic solvent; and the liquid inlet of the drainage tube (11) is arranged above the piston assembly (8).

5. The leakage-proof fat extraction device according to claim 1, characterized in that: The first filter screen (6) is a PTFE hydrophobic membrane, and the second filter screen (7) is a coarse filter screen.

6. The leakage-proof fat extraction device according to claim 1, characterized in that: The air guide pipe (5) is arranged on the upper side wall of the extractor (2), and the siphon pipe (4) is arranged on the lower side wall of the extractor (2).

7. The leakage-proof fat extraction device according to claim 1, characterized in that: A water bath heater is provided below the extraction bottle (3).

8. The leakage-proof fat extraction device according to claim 1, characterized in that: The extractor (2) is provided with two sealing sleeves, one of which is provided at the connection between the extractor (2) and the extraction bottle (3), and the other of which is provided at the connection between the extractor (2) and the condenser (1).

Images