Device for detecting sealing performance of ultrafiltration centrifugal tube

Abstract

The utility model discloses an ultrafiltration centrifugal tube sealing performance detection device which comprises an air inlet pipe used for injecting air into an ultrafiltration centrifugal tube, an air pressure detector used for detecting the air pressure of the air in the ultrafiltration centrifugal tube, and an air stop valve used for controlling the air inlet of the air inlet pipe, and the air stop valve and the air pressure detector are installed on the air inlet pipe. A gas outlet of the gas inlet pipe is connected with a silicon rubber plug used for sealing the open end of the ultrafiltration centrifugal tube, and the silicon rubber plug is provided with a through hole communicated with the gas outlet of the gas inlet pipe. According to the utility model, the sealing performance of the ultra-filtration centrifuge tube can be detected, whether the ultra-filtration centrifuge tube leaks or not is detected through the change of the air pressure of the air in the ultra-filtration centrifuge tube, and the detected ultra-filtration centrifuge tube can still be used.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafiltration centrifuge tube detection, and more specifically, to a sealing detection device for an ultrafiltration centrifuge tube. Background Art

[0002] Since ultrafiltration centrifuge tubes are used under high-speed centrifugation conditions, they face high speeds and high pressures, so high pressure resistance and sealing properties are required for ultrafiltration centrifuge tubes. Currently, protein liquids are usually sampled for testing, and the ultrafiltration centrifuge tubes after testing are contaminated and cannot be used, so the testing is very limited.

[0003] Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a device for detecting the sealing performance of an ultrafiltration centrifuge tube.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for detecting the sealing performance of an ultrafiltration centrifuge tube comprises an air inlet pipe for injecting gas into the ultrafiltration centrifuge tube, an air pressure detector for detecting the air pressure of the gas in the ultrafiltration centrifuge tube, and an air stop valve for controlling the air intake of the air inlet pipe, wherein the air stop valve and the air pressure detector are installed on the air inlet pipe and are arranged in sequence along the gas flow direction in the air inlet pipe, the air outlet of the air inlet pipe is connected to a silicone rubber plug for sealing the open end of the ultrafiltration centrifuge tube, and the silicone rubber plug is provided with a through hole connected to the air outlet of the air inlet pipe.

[0007] Furthermore, the air stop valve includes a butterfly plate, and the butterfly plate rotates relative to the air intake pipe to control the conduction and cutoff of the air intake pipe.

[0008] Furthermore, the air stop valve also includes a rotating handle and a rotating shaft, one end of the rotating shaft is connected to the rotating handle, and the other end of the rotating shaft is connected to the side wall of the butterfly plate, and the rotating handle drives the butterfly plate to rotate through the rotating shaft.

[0009] Furthermore, it also includes a shell, and the air inlet pipe, air pressure detector and air stop valve are installed on the shell.

[0010] Furthermore, it also includes a placement seat, which is provided with a placement groove for accommodating the ultrafiltration centrifuge tube, and the shell is installed on the placement seat.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model can realize the sealing detection of the ultrafiltration centrifuge tube, and detect whether the ultrafiltration centrifuge tube has leakage through the air pressure change of the gas in the ultrafiltration centrifuge tube, and the ultrafiltration centrifuge tube can still be used after the detection.

[0013] 2. In the utility model, by setting a silicone rubber plug, on the basis of ensuring the sealing of the open end of the ultrafiltration centrifuge tube, the silicone rubber plug is installed on the open end of the ultrafiltration centrifuge tube through interference fit by utilizing the deformability and elasticity of the silicone rubber plug, so as to improve the sealing effect and improve the accuracy of air pressure detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of the ultrafiltration centrifuge tube sealing detection device in this embodiment;

[0015] Figure 2 A schematic diagram of the structure of the silicone rubber plug in this embodiment;

[0016] Figure 3 A schematic diagram of the structure of the placement seat in this embodiment;

[0017] Figure 4 A schematic diagram of a structure in which the air intake pipe is cut off in this embodiment;

[0018] Figure 5 It is a structural schematic diagram of the intake pipe conduction in this embodiment.

[0019] Reference numerals: air inlet pipe 1, air pressure detector 2, air stop valve 3, butterfly plate 301, rotating shaft 302, rotating handle 303, silicone rubber plug 4, through hole 5, housing 6, placement seat 7, placement slot 8, ultrafiltration centrifuge tube. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment: A device for detecting the sealing performance of an ultrafiltration centrifuge tube, such as Figure 1-Figure 5As shown, it includes an air inlet pipe 1 for injecting gas into the ultrafiltration centrifuge tube 9, an air pressure detector 2 for detecting the air pressure of the gas in the ultrafiltration centrifuge tube 9, and a stop valve 3 for controlling the air intake of the air inlet pipe 1, wherein the air inlet pipe 1 is a hollow tubular structure, having an air inlet and an air outlet, the gas is injected into the air inlet pipe 1 through the air inlet of the air inlet pipe 1, and the gas in the air inlet pipe 1 is injected into the ultrafiltration centrifuge tube 9 through the air outlet of the air inlet pipe 1, and the stop valve 3 and the air pressure detector 2 are installed at the inlet The air pipe 1 is located between the air inlet and the air outlet of the air inlet pipe 1. The air stop valve 3 and the air pressure detector 2 are arranged in sequence along the gas flow direction in the air inlet pipe 1, that is, the air pressure detector 2 is located between the air stop valve 3 and the air outlet of the air inlet pipe 1. The air outlet of the air inlet pipe 1 is connected with a silicone rubber plug 4, which is adapted to the open end of the ultrafiltration centrifuge tube 9 and is a cylindrical structure for sealing the open end of the ultrafiltration centrifuge tube 9. The silicone rubber plug 4 is provided with a through hole 5 connected to the air outlet of the air inlet pipe 1.

[0022] When in use, the silicone rubber plug 4 is embedded in the open end of the ultrafiltration centrifuge tube 9, the open end of the ultrafiltration centrifuge tube 9 is sealed, and then the air inlet of the air inlet pipe 1 is connected to the air source, the air stop valve 3 is opened to make the air inlet pipe 1 conductive, and then the air source is opened, and the air source injects a certain pressure of gas, such as nitrogen, into the ultrafiltration centrifuge tube 9 through the air inlet pipe 1 and the through hole 5 of the silicone rubber plug 4. After reaching a certain pressure, the air stop valve 3 is closed, and the air inlet pipe 1 is cut off, that is, the ultrafiltration centrifuge tube 9 and the air source are cut off, and the gas in the ultrafiltration centrifuge tube 9 will not flow back to the air source. At this time, the air pressure detector 2 is turned on to detect the air pressure of the gas in the ultrafiltration centrifuge tube 9, and the air pressure change of the gas in the ultrafiltration centrifuge tube 9 is used to detect whether the ultrafiltration centrifuge tube 9 is leaking. Among them, the air pressure detector 2 has a switch. When the switch is turned off, the air pressure detector 2 is cut off from the air inlet pipe 1. When the switch is turned on, the air pressure detector 2 is conductive to the air inlet pipe 1, that is, the air pressure detector 2 is conductive to the ultrafiltration centrifuge tube 9 through the air inlet pipe 1.

[0023] By setting the silicone rubber plug 4, on the one hand, the open end of the ultrafiltration centrifuge tube 9 can be sealed, and on the other hand, the silicone rubber plug 4 can be installed on the open end of the ultrafiltration centrifuge tube 9 through interference fit by utilizing the deformability and elasticity of the silicone rubber plug 4 to improve the sealing effect and improve the accuracy of air pressure detection.

[0024] Furthermore, the air stop valve 3 includes a butterfly plate 301, which rotates relative to the air intake pipe 1 to control the conduction and cutoff of the air intake pipe 1. The butterfly plate 301 is a circular plate structure, and the rotation axis of the butterfly plate 301 is perpendicular to the central axis of the air intake pipe 1; Figure 4 As shown, the air intake pipe 1 is in the cut-off state, at which time the butterfly plate 301 is parallel to the annular cross section of the air intake pipe 1; Figure 5 As shown, the air intake pipe 1 is in a conducting state, and at this time, the butterfly plate 301 is perpendicular to the annular cross section of the air intake pipe 1.

[0025] The air stop valve 3 further includes a handle 303 and a shaft 302. One end of the shaft 302 is connected to the handle 303, and the other end of the shaft 302 is connected to the side wall of the butterfly plate 301. The handle 303 drives the butterfly plate 301 to rotate through the shaft 302. When the handle 303 rotates, the handle 303 drives the shaft 302 to rotate, and drives the butterfly plate 301 to rotate through the shaft 302.

[0026] Further, such as Figure 1 As shown, the device further comprises a housing 6 , which serves as a load-bearing device, and the air inlet pipe 1 , the air pressure detector 2 and the air stop valve 3 are mounted on the housing 6 .

[0027] As a preference, Figure 1 , Figure 3 As shown, the above-mentioned device also includes a placement seat 7, on which a placement groove 8 compatible with the ultrafiltration centrifuge tube 9 is opened, which is used to place the ultrafiltration centrifuge tube 9, play a bearing role, and ensure the stability of the ultrafiltration centrifuge tube 9 during detection; at the same time, the placement seat 7 has a bracket, and by installing the shell 6 on the bracket of the placement seat 7, the stability of the shell 6 and the air inlet pipe 1, the air pressure detector 2 and the air stop valve 3 installed on the shell 6 during detection is ensured.

[0028] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An ultrafiltration centrifuge tube sealing detection device, comprising an air inlet pipe (1) for injecting gas into an ultrafiltration centrifuge tube (9), an air pressure detector (2) for detecting the air pressure of the gas in the ultrafiltration centrifuge tube (9), and an air stop valve (3) for controlling the air intake of the air inlet pipe (1), characterized in that: The air stop valve (3) and the air pressure detector (2) are installed on the air inlet pipe (1) and are arranged in sequence along the gas flow direction in the air inlet pipe (1). The air outlet of the air inlet pipe (1) is connected to a silicone rubber plug (4) for sealing the open end of an ultrafiltration centrifuge tube (9). The silicone rubber plug (4) is provided with a through hole (5) connected to the air outlet of the air inlet pipe (1).

2. The ultrafiltration centrifuge tube sealing detection device according to claim 1, characterized in that: The air stop valve (3) comprises a butterfly plate (301), and the butterfly plate (301) rotates relative to the air intake pipe (1) to control the opening and closing of the air intake pipe (1).

3. The ultrafiltration centrifuge tube sealing detection device according to claim 2, characterized in that: The air stop valve (3) further comprises a rotating handle (303) and a rotating shaft (302); one end of the rotating shaft (302) is connected to the rotating handle (303), and the other end of the rotating shaft (302) is connected to the side wall of the butterfly plate (301); the rotating handle (303) drives the butterfly plate (301) to rotate via the rotating shaft (302).

4. The ultrafiltration centrifuge tube sealing detection device according to claim 1, characterized in that: It also comprises a housing (6), on which the air inlet pipe (1), the air pressure detector (2) and the air stop valve (3) are mounted.

5. The ultrafiltration centrifuge tube sealing detection device according to claim 4, characterized in that: It also comprises a placement seat (7), the placement seat (7) is provided with a placement groove (8) for accommodating an ultrafiltration centrifuge tube (9), and the housing (6) is mounted on the placement seat (7).

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