A sealing structure of a separatory funnel piston

Abstract

The application relates to the technical field of separatory funnels, in particular to a sealing structure of a separatory funnel piston. A piston rod is arranged in a separation pipe of a funnel bottle body, one end of the piston rod is sealed and combined with the end face of the separation pipe, a connecting end is formed at the end of the piston rod penetrating through the separation pipe, a step is formed at the connecting position between the piston rod and the connecting end, a sealing assembly is sleeved on the connecting end, a locking piece is installed at the connecting end, the sealing assembly is tightly combined with the end face of the separation pipe and the end face of the step through the locking piece, the gap between the separation pipe and the piston rod is sealed, the problem that solution leakage is caused by piston rod loosening during the test process is avoided, the sealing effect is improved, and the stability of the separatory funnel sealing is ensured.

Description

Technical Field

[0001] This application relates to the field of separatory funnel technology, and in particular to a sealing structure for a separatory funnel piston. Background Technology

[0002] Currently, in laboratory water sample testing, separatory funnels are typically used to separate and analyze water samples. A stopcock is usually installed on the funnel body to open or close the bottom opening. However, current separatory funnels simply use a sealing ring between the body and the stopcock, resulting in an unstable seal. This allows solution to leak between the stopcock and the body, leading to water sample leakage. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a sealing structure for a separatory funnel piston, comprising a funnel body and a separation tube integrally formed with the funnel body. The separation tube is hollow and connected to the funnel body. A piston rod is inserted through the separation tube, with one end of the piston rod sealingly fitted to the end face of the separation tube. A connecting end is formed at the end of the piston rod passing through the separation tube. A step is formed between the piston rod and the connecting end. A sealing assembly is fitted onto the connecting end, and a locking member is installed on the connecting end. The locking member is used to tightly fit the sealing assembly to the end face of the separation tube and the end face of the step.

[0004] Preferably, the sealing assembly includes a sleeve that passes through the connecting end, the sleeve having a through hole in its center for the connecting end to pass through, and a sealing gasket provided on the side of the sleeve facing the separating tube, the sealing gasket abutting against the end face of the separating tube and the end face of the step, respectively.

[0005] Preferably, a receiving cavity is formed on the side of the sleeve facing the separating tube, and the sealing gasket is fixed in the receiving cavity.

[0006] Preferably, the locking member is threadedly connected to the connecting end.

[0007] Preferably, the piston rod has an annular groove at the end away from the connecting end, and a sealing element is provided in the annular groove.

[0008] Preferably, the outer circumferential surface of the piston rod is a conical surface, and the angle of the conical surface is 2-3°.

[0009] Preferably, a pull rod is inserted through the end of the piston rod away from the connecting end.

[0010] As can be seen from the above, the following beneficial effects can be obtained by applying the method provided in this application: By inserting a piston rod through the separation tube of the funnel bottle, one end of the piston rod is sealed and fitted to the end face of the separation tube, a connecting end is formed at the end of the piston rod passing through the separation tube, a step is formed at the connection between the piston rod and the connecting end, a sealing component is fitted on the connecting end, and a locking component is installed at the connecting end. The locking component then tightly fits the sealing component to the end face of the separation tube and the end face of the step, thereby sealing the gap between the separation tube and the piston rod, avoiding the problem of solution leakage caused by the piston rod loosening during the experiment, improving the sealing effect, and ensuring the stability of the separatory funnel seal. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only a part of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the sealing structure of the separatory funnel piston in an embodiment of this application.

[0013] Figure 2 This is a cross-sectional view of the sealing structure of the separatory funnel piston in an embodiment of this application.

[0014] Figure 3 This is a structural diagram of the piston rod according to an embodiment of this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0016] Example

[0017] To address the aforementioned technical problems, this embodiment provides a sealing structure for the piston of a separating funnel, such as... Figure 1-2As shown, the funnel includes a funnel body 10 and a separating tube 20 integrally formed with the funnel body 10. The separating tube 20 has a hollow structure and is connected to the funnel body 10. A piston rod 30 is inserted through the separating tube 20. One end of the piston rod 30 is sealed and fitted to the end face of the separating tube 20. A connecting end 32 is formed at the end of the piston rod 30 that passes through the separating tube 20. A step 31 is formed at the connection between the piston rod 30 and the connecting end 32. A sealing component 40 is fitted on the connecting end 32. A locking component 50 is installed at the connecting end 32. The locking component 50 tightly fits the sealing component 40 to the end face of the separating tube 20 and the end face of the step 31, thereby sealing the gap between the separating tube 20 and the piston rod 30. This prevents the piston rod 30 from loosening during the experiment, which could lead to solution leakage, improves the sealing effect, and ensures the stability of the separating funnel seal.

[0018] Specifically, the sealing assembly 40 includes a sleeve 41 that passes through the connecting end 32. A through hole is provided in the center of the sleeve 41 for the connecting end 32 to pass through. A sealing gasket 42 is provided on the side of the sleeve 41 facing the separating tube 20. After the piston rod 30 is inserted into the separating tube 20, the sleeve 41 with the sealing gasket 42 is fitted into the connecting end 32. The connecting end 32 is then connected to the locking member 50. The locking member 50 presses the sleeve 41, thereby making the sealing gasket 42 tightly abut against the end face of the separating tube 20 and the end face of the step 31, thereby improving the sealing effect.

[0019] Furthermore, a receiving cavity is formed on the side of the sleeve 41 facing the separating tube 20, and the sealing gasket 42 is fixed in the receiving cavity. The locking member 50 then presses the end face of the sleeve 41, thereby ensuring that the sealing gasket 42 on the other side of the sleeve 41 is tightly fitted against the end face of the separating tube 20 and the end face of the step 31. In some embodiments, the sealing gasket 42 can be fixed in the receiving cavity of the sleeve 41 using adhesive.

[0020] In the above scheme, a thread is formed on the surface of the connecting end 32, and then the locking member 50 is threadedly connected to the connecting end 32. The sleeve 41 is locked and fixed by the locking member 50, so that the sealing gasket 42 of the sleeve 41 seals the gap between the separating tube 20 and the piston rod 30, and achieves the purpose of facilitating disassembly and installation.

[0021] Furthermore, such as Figure 3 As shown, an annular groove 33 is provided at the end of the piston rod 30 away from the connecting end 32. A sealing element 60 is provided in the annular groove 33. After the piston rod 30 is inserted into the separation tube 20, the gap between the separation tube 20 and the piston rod 30 is sealed by the sealing element 60, thereby sealing both ends of the separation tube 20 and the piston rod 30 respectively, thus preventing solution leakage.

[0022] Furthermore, in some embodiments, the outer peripheral surface of the piston rod 30 is a conical surface, as shown in the figure, the angle α of the conical surface is 2-3°, preferably 2°. Alternatively, the inner wall of the separator tube 20 can also be formed into a conical surface, thereby cooperating with the outer peripheral surface of the piston rod 30. When the piston rod 30 is inserted into the separator tube 20, the designed conical surface can reduce the friction between the surface of the piston rod 30 and the inner wall of the separator tube 20.

[0023] Furthermore, a pull rod 34 is inserted through the end of the piston rod 30 away from the connecting end 32, so that when it is necessary to remove the piston rod 30, the piston rod 30 can be easily pulled out by the pull rod 34. The pull rod 34 can be integrally formed and fixed with the piston rod 30.

[0024] In summary, the present application's solution involves inserting a piston rod through the separating tube of the funnel bottle. One end of the piston rod is sealed and fitted to the end face of the separating tube. A connecting end is formed at the end of the piston rod passing through the separating tube. A step is formed at the connection between the piston rod and the connecting end. A sealing component is fitted onto the connecting end, and a locking element is installed at the connecting end. The locking element then tightly fits the sealing component to the end face of the separating tube and the end face of the step, thereby sealing the gap between the separating tube and the piston rod. This prevents the piston rod from loosening during the experiment, which could lead to solution leakage, improves the sealing effect, and ensures the stability of the separatory funnel seal.

[0025] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A sealing structure for a separatory funnel piston, characterized in that: The device includes a funnel bottle body (10) and a separation tube (20) integrally formed with the funnel bottle body (10). The separation tube (20) is hollow and connected to the funnel bottle body (10). A piston rod (30) is inserted in the separation tube (20). One end of the piston rod (30) is sealed and fitted to the end face of the separation tube (20). A connecting end (32) is formed at the end of the piston rod (30) that passes through the separation tube (20). A step (31) is formed at the connection between the piston rod (30) and the connecting end (32). A sealing component (40) is fitted on the connecting end (32). A locking component (50) is installed on the connecting end (32). The locking component (50) is used to tightly fit the sealing component (40) to the end face of the separation tube (20) and the end face of the step (31).

2. The sealing structure of the separatory funnel piston according to claim 1, characterized in that: The sealing assembly (40) includes a sleeve (41) that passes through the connecting end (32). The sleeve (41) has a through hole in the center for the connecting end (32) to pass through. A sealing gasket (42) is provided on the side of the sleeve (41) facing the separating tube (20). The sealing gasket (42) abuts against the end face of the separating tube (20) and the end face of the step (31).

3. The sealing structure of the separatory funnel piston according to claim 2, characterized in that: A receiving cavity is formed on the side of the sleeve (41) facing the separation tube (20), and the sealing gasket (42) is fixed in the receiving cavity.

4. The sealing structure of the separatory funnel piston according to claim 2, characterized in that: The locking member (50) is threadedly connected to the connecting end (32).

5. The sealing structure of the separatory funnel piston according to claim 1, characterized in that: The piston rod (30) has an annular groove (33) at one end away from the connecting end (32), and a sealing element (60) is provided in the annular groove (33).

6. The sealing structure of the separatory funnel piston according to claim 5, characterized in that: The outer circumferential surface of the piston rod (30) is a conical surface with an angle of 2-3°.

7. The sealing structure of the separatory funnel piston according to claim 1, characterized in that: A pull rod (34) is inserted through the end of the piston rod (30) away from the connecting end (32).

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