A separatory funnel

Abstract

The application relates to a liquid separation funnel, which comprises a funnel body, a plug assembly arranged at the bottom of the funnel body and used for controlling liquid outflow, and a positioning end cover arranged at the funnel body and used for positioning the plug assembly; the plug assembly comprises a plug valve core rotatably arranged in the funnel body and a knob handle connected to one end of the plug valve core, and the plug valve core is provided with a quantitative groove used for accommodating a solution; the positioning end cover is provided with a positioning groove used for inserting the other end of the plug valve core, and the positioning end cover is provided with a positioning piece used for limiting the plug valve core in the positioning groove. The application has the effect of improving the efficiency of reagent subpackaging.

Description

Technical Field

[0001] This application relates to the technical field of laboratory instruments for biological, chemical, and pharmaceutical applications, and in particular to a separatory funnel. Background Technology

[0002] A separatory funnel is a glass instrument used to separate two immiscible liquids or liquids with very low solubility. It is a core tool in extraction and washing operations and is commonly used in organic synthesis, pharmaceuticals, environmental monitoring, and chemistry teaching.

[0003] A separating funnel consists of a funnel body with an inlet at the top for liquid inflow and an outlet at the bottom for liquid outflow. A control stopcock at the lower end of the funnel controls the flow of liquid from the outlet. When separating two immiscible or poorly soluble liquids, the mixed solution is poured into the funnel through the inlet. Utilizing the density difference between the two immiscible liquids, upon settling, the denser liquid sinks to the bottom, forming the lower layer, while the less dense liquid floats to the top, forming the upper layer. The control stopcock at the lower end of the separating funnel controls the outflow of the lower layer, while the upper layer is poured out through the inlet at the top of the funnel, thus separating the different liquids.

[0004] Regarding the aforementioned technologies, the separatory funnel can only separate two immiscible liquids, and cannot achieve real-time quantitative extraction of the required liquid. It is necessary to separate the liquids and then use other weighing instruments, such as pipettes, which makes the dispensing process cumbersome and inefficient. Utility Model Content

[0005] To improve the efficiency of reagent dispensing, this application provides a separatory funnel.

[0006] The separating funnel provided in this application adopts the following technical solution:

[0007] A dispensing funnel includes a funnel body, a stopcock assembly disposed at the bottom outlet of the funnel body for controlling the flow of liquid, and a positioning end cap disposed in the funnel body for positioning the stopcock assembly; the stopcock assembly includes a stopcock valve core rotatably mounted in the funnel body and a knob handle connected to one end of the stopcock valve core, the stopcock valve core having a metering groove for receiving the solution; the positioning end cap having a positioning groove for inserting the other end of the stopcock valve core, and the positioning end cap having a positioning element disposed in the positioning groove for limiting the position of the stopcock valve core.

[0008] By adopting the above technical solution, the funnel body is used to hold liquid, the stopcock assembly controls the liquid flow, and the metering groove can receive a metered solution to achieve the function of metered dispensing. The positioning element set in the positioning end cap can position the stopcock valve core, ensuring that when the stopcock valve core is rotated, the metering groove of the stopcock valve core can be aligned with the output port of the funnel body to accurately receive the reagent liquid. The knob handle facilitates the rotation of the stopcock valve core. By rotating the stopcock valve core, the opening of the metering groove filled with solution faces downward, and the liquid in the metering groove is discharged from the output port.

[0009] Optionally, the positioning element is a ball-head spring plunger, the inner wall of the positioning groove is provided with an installation groove for installing the ball-head spring plunger, and the plug valve core is provided with a limiting groove that is coaxial with the metering groove and cooperates with the ball head of the ball-head spring plunger.

[0010] By adopting the above technical solution, the specific structure of the positioning component is disclosed. The limiting groove and the ball head of the ball spring plunger can position the valve core. When the ball spring plunger is inserted into the limiting groove, the metering groove can be aligned with the output direction of the output tube of the funnel body, ensuring the positional accuracy of the metering groove when receiving the solution.

[0011] Optionally, the metering groove is an arc-shaped groove.

[0012] By adopting the above technical solution, the quantitative groove is an arc-shaped groove, which can better receive and flow out the solution, and reduce the probability of the solution sticking to the wall inside the quantitative groove.

[0013] Optionally, the number of the metering grooves is multiple and an even number, the multiple metering grooves are arranged symmetrically, and the stopcock valve core is tightly fitted with the inner wall of the output pipe of the funnel body.

[0014] By adopting the above technical solution, multiple quantitative grooves can realize multiple quantitative dispensing, improving dispensing efficiency; the quantitative grooves, which are in even numbers and symmetrically arranged, allow the solution in the quantitative grooves of the stopcock valve core to flow out from the output pipe of the funnel body when receiving the solution; the stopcock valve core is tightly fitted with the inner wall of the output pipe of the funnel body, reducing the probability of liquid leakage when the stopcock valve core is rotated.

[0015] Optionally, the number of the limiting grooves is consistent with the number of the quantitative grooves and corresponds one-to-one.

[0016] By adopting the above technical solution, the number of limiting grooves is consistent with the number of quantitative grooves and corresponds one-to-one, which enables each quantitative groove to be precisely limited at a specific position.

[0017] Optionally, a threaded groove is provided on one side of the knob handle, and a locking thread that mates with the threaded groove is provided at the end of the plug valve core.

[0018] By adopting the above technical solution, the knob handle and the plug valve core are connected detachably through the threaded groove and locking thread, which facilitates installation and disassembly.

[0019] Optionally, the outer peripheral sidewall of the knob handle is provided with friction texture.

[0020] By adopting the above technical solution, the knob handle is connected to the locking thread at the end of the plug valve core through the threaded groove. The friction texture on the outer peripheral side wall of the knob handle can increase the friction between the hand and the knob handle, making it convenient to rotate the knob handle to control the rotation of the plug valve core.

[0021] Optionally, it also includes a support frame for supporting the funnel body, the support frame including a support base plate, a support ring for fixing the funnel body, and a support column connected to the support base plate and the support ring.

[0022] By adopting the above technical solution, the support frame can provide support for the funnel body. The structure of the support base plate, support ring, and support column can stably fix the funnel body on the support ring. The support column is connected to the support base plate, ensuring the stability of the funnel body during use.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] A dispensing funnel uses a stopcock assembly with a metering groove to receive the solution and achieve quantitative dispensing. The positioning element of the positioning end cap limits the position of the stopcock valve core, ensuring that the metering groove of the stopcock valve core is accurately positioned.

[0025] The fit between the ball-head spring plunger and the limiting groove ensures the accuracy of the position of the metering groove when receiving the solution;

[0026] Multiple metering grooves on the plug valve core enable multiple metering dispensing operations, improving dispensing efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a separating funnel in an embodiment of this application.

[0028] Figure 2 This is a schematic cross-sectional view of the fit between the plug assembly and the positioning end cap in an embodiment of this application.

[0029] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0030] Figure 4 yes Figure 2 A magnified view of a portion of point B in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. Funnel body; 11. Inlet; 12. Outlet pipe; 13. Arrangement cavity; 14. Conical guide section; 2. Plug assembly; 21. Plug valve core; 211. Locking thread; 22. Knob handle; 221. Threaded groove; 222. Friction pattern; 23. Limiting groove; 24. Metering groove; 3. Positioning end cap; 31. Positioning groove; 311. Mounting groove; 32. Positioning component; 321. Plunger housing; 322. Plunger ball; 323. Plunger spring; 4. Support frame; 41. Support base plate; 42. Support ring; 43. Support column. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a separating funnel. (Refer to...) Figure 1 The dispensing funnel includes a funnel body 1, a stopcock assembly 2 located at the bottom outlet of the funnel body 1 for controlling the liquid flow, and a positioning end cap 3 located on the funnel body 1 for positioning the stopcock assembly 2. The funnel body 1 has an inlet 11 at the top for pouring in the solution reagent, and an outlet pipe 12 at the bottom for supplying liquid flow. The bottom of the outlet pipe 12 has a conical guide portion 14. The funnel body 1 can be a circular funnel or a pear-shaped funnel. In this embodiment, the funnel body 1 is a pear-shaped funnel, and its bottom outlet pipe 12 is integrally formed with the funnel body 1.

[0034] Reference Figure 1 and Figure 2 The stopcock assembly 2 includes a stopcock valve core 21 rotatably mounted within the funnel body 1 and a knob handle 22 connected to one end of the stopcock valve core 21. In this embodiment, the stopcock valve core 21 is cylindrical and made of polytetrafluoroethylene (PTFE). The stopcock valve core 21 is arranged laterally at the bottom outlet of the funnel body 1 and perpendicular to the outlet axis. The funnel body 1 has an arrangement cavity 13 for accommodating the stopcock valve core 21, and both ends of the stopcock valve core 21 extend out of the arrangement cavity 13. A metering groove 24 for receiving the solution is formed on the side wall of the stopcock valve core 21, and the metering groove 24 corresponds to the outlet of the funnel body 1. The metering groove 24 is an arc-shaped groove, which reduces the probability of liquid residue remaining in the metering groove 24 when the liquid is poured out. In this embodiment, the metering standard of the metering groove 24 can be 1 ml or 5 ml, and its specific size can be customized according to the user's needs.

[0035] Reference Figure 1 and Figure 2To improve dispensing efficiency, the stopcock valve core 21 can have multiple metering grooves 24, and the number of metering grooves 24 is even, with the multiple metering grooves 24 arranged symmetrically. When the stopcock valve core 21 is rotated so that a certain number of metering grooves 24 are aligned with the output port at the bottom of the dispensing funnel, the other metering groove 24 arranged symmetrically can rotate to the bottom with its groove opening facing downwards, and the solution reagent in the metering groove 24 flows out from the output port of the output tube 12. The stopcock valve core 21 fits tightly with the inner wall of the arrangement cavity 13 of the funnel body 1, making it difficult for the solution reagent in the metering groove 24 to leak out when the stopcock valve core 21 is rotated.

[0036] Reference Figure 1 and Figure 2 The knob handle 22 has a threaded groove 221 on one side, and the end of the stopcock valve core 21 has a locking thread 211 that mates with the threaded groove 221. In this embodiment, the knob handle 22 is made of plastic, and the cross-sectional shape of the knob handle 22 is circular. The outer peripheral sidewall of the knob handle 22 is also provided with friction texture 222. The friction texture 222 can increase the friction between the hand and the knob handle 22, making it easier for the user to rotate the knob handle 22.

[0037] Reference Figure 1 and Figure 2 The positioning end cap 3 has a positioning groove 31 for inserting the other end of the plug valve core 21. In this embodiment, the positioning end cap 3 has a circular cross-section and is made of metal. The positioning end cap 3 is installed on the outer peripheral side wall of the arrangement cavity 13 of the funnel body 1 by interference fit.

[0038] Reference Figure 2 and Figure 4 The positioning end cap 3 has a positioning element 32 within the positioning groove 31 for limiting the position of the stopcock valve core 21. The positioning element 32 is a ball-head spring plunger, and the inner wall of the positioning groove 31 has an installation groove 311 for installing the ball-head spring plunger. The ball-head spring plunger includes a plunger housing 321, a plunger ball 322 installed in the plunger housing 321, and a plunger spring 323 installed inside the plunger housing 321 and cooperating with the plunger ball 322. The stopcock valve core 21 has a limiting groove 23 that is coaxial with the metering groove 24 and cooperates with the ball head of the ball-head spring plunger. The number of limiting grooves 23 is the same as the number of metering grooves 24 and they correspond one-to-one. The arrangement of the ball-head spring plunger in the groove and the cooperation of the limiting groove 23 ensures that the stopcock valve core 21 is aligned with the output port of the funnel body 1 when rotating, so that the solution reagent can accurately flow into the metering groove 24. The number of limiting grooves 23 is the same as the number of quantitative grooves 24 and they correspond one-to-one, which enables each quantitative groove 24 to be precisely limited at a specific position.

[0039] Reference Figure 1The dispensing funnel also includes a support frame 4 for supporting the funnel body 1. The support frame 4 includes a support base plate 41, a support ring 42 for fixing the funnel body 1, and support columns 43 connecting the support base plate 41 and the support ring 42. The support base plate 41 is circular, and the support ring 42 is also circular. The diameter of the support ring 42 is not greater than the maximum diameter of the funnel body 1, and the diameter of the support base plate 41 is not less than the diameter of the circular ring. There are at least two support columns 43. In this embodiment, there are two support columns 43 arranged symmetrically. The support columns 43 are made of metal and are connected to the support base plate 41 and the support ring 42 by welding.

[0040] Combination Figures 1 to 4 The implementation principle of a dispensing funnel according to an embodiment of this application is as follows: When it is necessary to dispense a solution reagent, the funnel body 1 is first placed on the support ring 42 of the support frame 4 from top to bottom. Then, the solution reagent is poured into the funnel body 1 through the feed port 11. At this time, the metering groove 24 of the stopcock valve core 21 is aligned with the output port at the bottom of the funnel body 1. After the metering groove 24 receives a metered amount of liquid, the stopcock valve core 21 is rotated so that the metering groove 24 filled with liquid rotates to the bottom, allowing the solution reagent in the metering groove 24 to flow out from the output port of the output tube 12. When the stopcock valve core 21 is rotated, the ball spring plunger in the positioning end cap 3 cooperates with the limiting groove 23 to ensure that the angle of rotation of the stopcock valve core 21 is accurate each time, and to achieve the positioning function of the metering groove 24, so that each metering groove 24 can be aligned with the output port at the bottom of the funnel body 1 after rotation.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A separating funnel, characterized in that, The device includes a funnel body (1), a stopcock assembly (2) disposed at the bottom outlet of the funnel body (1) for controlling the flow of liquid, and a positioning end cap (3) disposed on the funnel body (1) for positioning the stopcock assembly (2). The stopcock assembly (2) includes a stopcock valve core (21) rotatably mounted in the funnel body (1) and a knob handle (22) connected to one end of the stopcock valve core (21). The stopcock valve core (21) has a metering groove (24) for receiving the solution. The positioning end cap (3) has a positioning groove (31) for inserting the other end of the stopcock valve core (21). The positioning end cap (3) has a positioning element (32) in the positioning groove (31) for limiting the position of the stopcock valve core (21).

2. A separating funnel according to claim 1, characterized in that, The positioning element (32) is a ball spring plunger. The inner wall of the positioning groove (31) is provided with an installation groove (311) for installing the ball spring plunger. The plug valve core (21) is provided with a limiting groove (23) that is coaxial with the metering groove (24) and cooperates with the ball head of the ball spring plunger.

3. A separating funnel according to claim 2, characterized in that, The quantitative groove (24) is an arc-shaped groove.

4. A separating funnel according to claim 3, characterized in that, The number of the quantitative grooves (24) is multiple and even, and the multiple quantitative grooves (24) are arranged symmetrically. The stopcock valve core (21) is tightly fitted with the inner wall of the output pipe (12) of the funnel body (1).

5. A separating funnel according to claim 4, characterized in that, The number of the limiting grooves (23) is the same as the number of the quantitative grooves (24) and they correspond one-to-one.

6. A separating funnel according to claim 1, characterized in that, The knob handle (22) has a threaded groove (221) on one side, and the end of the plug valve core (21) has a locking thread (211) that mates with the threaded groove (221).

7. A separating funnel according to claim 6, characterized in that, The outer peripheral sidewall of the knob handle (22) is provided with friction texture (222).

8. A separating funnel according to claim 1, characterized in that, It also includes a support frame (4) for supporting the funnel body (1), the support frame (4) including a support base plate (41), a support ring (42) for fixing the funnel body (1) and a support column (43) connecting the support base plate (41) and the support ring (42).

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