Blowout preventer for adding liquid nitrogen into grinding cup

Abstract

The utility model discloses a grinding cup liquid nitrogen adding blowout prevention device which comprises a grinding cup and a cover body detachably installed at the top of the grinding cup, a liquid adding opening is formed in the surface of the cover body, a guide pipe assembly is inserted into the liquid adding opening, and the top of the guide pipe assembly is fixedly connected with a funnel. The guide pipe assembly comprises a first straight pipe, a bent pipe and a second straight pipe which are sequentially and fixedly connected end to end, the first straight pipe is communicated with the funnel, and the bent pipe is of a U-shaped structure and is transversely arranged. According to the utility model, the cover body is additionally arranged on the grinding cup and is made of the transparent acrylic material, so that the volume of liquid nitrogen in the grinding cup and the grinding degree of a sample can be observed, the liquid nitrogen can be prevented from splashing out of the grinding cup when the liquid nitrogen is added due to the arrangement of the cover body, and the bent pipe adopts the U-shaped structure, so that the liquid nitrogen can be effectively prevented from overflowing back through the guide pipe assembly; and the blowout prevention purpose is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of biological experiments, in particular to a grinding cup adding liquid nitrogen anti-spout device. Background Art

[0002] Liquid nitrogen grinding also has certain applications in biomaterial processing. In the field of biomaterials, liquid nitrogen grinding is often used to prepare samples, especially for those biological samples that need to be processed at low temperatures. Liquid nitrogen grinding is a common and effective method; the extremely low temperature of liquid nitrogen can quickly freeze biological samples, thereby solidifying the cell structure and preventing changes in the biomolecules in the sample. This is very important for maintaining the original structure and characteristics of the sample, especially in molecular biology, biochemistry and medical research. At the same time, liquid nitrogen grinding can also be used to break cell walls and release biomolecules in the cell, such as proteins, nucleic acids, etc., for subsequent analysis and experimental operations.

[0003] However, during the liquid nitrogen grinding operation, liquid nitrogen is easily splashed when added to the sample grinding cup, which not only causes frostbite, but also the sample may overflow with the liquid nitrogen, causing the loss of grinding materials and affecting subsequent experimental research. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a grinding cup liquid nitrogen blowout prevention device, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a grinding cup liquid nitrogen blowout prevention device, comprising a grinding cup, a cover body detachably mounted on the top of the grinding cup, a liquid adding port is opened on the surface of the cover body, a catheter assembly is inserted in the liquid adding port, and a funnel is fixedly connected to the top of the catheter assembly;

[0008] The catheter assembly comprises a first straight pipe, a curved pipe, and a second straight pipe which are fixedly connected end to end in sequence, the first straight pipe is connected to the funnel, and the curved pipe is a U-shaped structure and is arranged transversely;

[0009] The invention also comprises a cup sleeve which is sleeved on the outside of the grinding cup.

[0010] Preferably, a limiting sleeve is fixedly connected to the second straight tube, and the limiting sleeve is coaxially fixedly connected to the second straight tube.

[0011] Preferably, a stopper is rotatably connected to the top of the cover body via a rotating shaft, and when the stopper rotates to above the liquid adding port, the liquid adding port is closed.

[0012] Preferably, the surface of the cover body is provided with an inverted cone-shaped socket, and a grinding rod is inserted into the socket.

[0013] Preferably, a rubber sleeve is fixedly connected to the inner wall of the socket to compensate for the gap between the socket and the grinding rod.

[0014] Preferably, a cavity is defined in the cover body.

[0015] (III) Beneficial effects

[0016] The utility model provides a grinding cup liquid nitrogen blowout prevention device, which has the following beneficial effects:

[0017] 1. In the utility model, a cover is added to the grinding cup, and the cover is made of a transparent acrylic material, which is helpful for observing the liquid nitrogen capacity in the grinding cup and the degree of sample grinding. The setting of the cover helps to prevent liquid nitrogen from splashing out of the grinding cup when adding liquid nitrogen, and the bent pipe adopts a U-shaped structure, which more effectively prevents liquid nitrogen from overflowing through the catheter assembly, thereby achieving the purpose of spray prevention.

[0018] 2. In the present invention, after the liquid nitrogen is completely added to the grinding cup, the stopper is rotated so that the stopper covers the liquid adding port to seal it and prevent the liquid nitrogen from overflowing, thereby further improving the grinding effect of the sample and reducing the amount of liquid nitrogen used. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front perspective structural diagram of a grinding cup liquid nitrogen blowout prevention device proposed by the utility model;

[0020] Figure 2 This is a three-dimensional explosion structure diagram of a grinding cup liquid nitrogen blowout prevention device proposed by the utility model;

[0021] Figure 3 This is a sectional stereoscopic structural diagram of a grinding cup liquid nitrogen blowout prevention device proposed by the utility model.

[0022] In the figure: 1, grinding cup; 101, liquid filling port; 102, socket; 103, chamber; 2, cover; 3, rubber sleeve; 4, stopper; 5, catheter assembly; 51, first straight tube; 52, curved tube; 53, second straight tube; 6, funnel; 7, limit sleeve; 8, grinding rod; 9, cup sleeve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figures 1 to 3The utility model provides a technical solution: a grinding cup liquid nitrogen blowout prevention device, comprising a grinding cup 1, a cover body 2 detachably mounted on the top of the grinding cup 1, the cover body 2 is made of glass fiber reinforced plastic, a liquid adding port 101 is opened on the surface of the cover body 2, a catheter assembly 5 is inserted into the liquid adding port 101, and a funnel 6 is fixedly connected to the top of the catheter assembly 5;

[0025] The catheter assembly 5 includes a first straight tube 51, a curved tube 52 and a second straight tube 53 which are fixedly connected end to end in sequence. The first straight tube 51 is connected to the funnel 6, and the curved tube 52 is a U-shaped structure and is arranged transversely.

[0026] The invention also comprises a cup sleeve 9 which is sleeved on the outside of the grinding cup 1 and is used for heat insulation and is convenient for hand holding.

[0027] A cover 2 is added to the grinding cup 1. The cover 2 is made of a transparent acrylic material, which helps to observe the liquid nitrogen capacity and the degree of sample grinding in the grinding cup 1. The setting of the cover 2 helps to prevent liquid nitrogen from splashing out of the grinding cup 1 when adding liquid nitrogen. The bent pipe 52 adopts a U-shaped structure, which more effectively prevents liquid nitrogen from overflowing through the catheter assembly 5, thereby achieving the purpose of spray prevention.

[0028] In order to support and limit the catheter assembly 5, a limiting sleeve 7 is fixedly connected to the second straight tube 53, and the limiting sleeve 7 is coaxially fixedly connected to the second straight tube 53. When adding liquid nitrogen, the second straight tube 53 of the catheter assembly 5 is inserted into the liquid adding port 101, and the limiting sleeve 7 is in contact with the surface of the cover body 2 to support the entire catheter assembly 5 and the funnel 6. Then, the liquid nitrogen is poured into the funnel 6, and the liquid nitrogen flows along the first straight tube 51, the curved tube 52 and the second straight tube 53, and finally flows into the grinding cup 1.

[0029] The top of the cover body 2 is rotatably connected with a stopper 4 via a rotating shaft. When the stopper 4 rotates to above the liquid filling port 101 , the liquid filling port 101 is closed.

[0030] In order to grind the sample, an inverted cone-shaped socket 102 is opened on the surface of the cover body 2, that is, the cross-sectional area gradually increases from top to bottom when viewed from above, ensuring that the grinding rod 8 has room to move. A grinding rod 8 is inserted in the socket 102, and the grinding purpose is achieved by bringing the bottom end of the grinding rod 8 into contact with the sample.

[0031] In addition, a rubber sleeve 3 is fixedly connected to the inner wall of the socket 102 to compensate for the gap between the socket 102 and the grinding rod 8, thereby further preventing liquid nitrogen from volatilizing through the gap between the socket 102 and the grinding rod 8.

[0032] A chamber 103 is provided in the cover body 2 , and the interior of the chamber 103 is in a vacuum state, so as to achieve the purpose of heat insulation between the interior of the grinding cup 1 and the exterior of the cover body 2 , and prevent water mist from condensing on the top of the cover body 2 .

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A grinding cup liquid nitrogen blowout prevention device, characterized in that: The invention comprises a grinding cup (1), and a cover body (2) detachably mounted on the top of the grinding cup (1); a liquid adding port (101) is provided on the surface of the cover body (2); a conduit assembly (5) is inserted into the liquid adding port (101); and a funnel (6) is fixedly connected to the top of the conduit assembly (5); The catheter assembly (5) comprises a first straight tube (51), a curved tube (52) and a second straight tube (53) which are fixedly connected end to end in sequence, the first straight tube (51) is connected to the funnel (6), and the curved tube (52) is a U-shaped structure and is arranged transversely; It also includes a cup sleeve (9) which is sleeved on the outside of the grinding cup (1).

2. A grinding cup liquid nitrogen blowout prevention device according to claim 1, characterized in that: A limiting sleeve (7) is fixedly connected to the second straight tube (53), and the limiting sleeve (7) is coaxially fixedly connected to the second straight tube (53).

3. The grinding cup liquid nitrogen blowout prevention device according to claim 1, characterized in that: The top of the cover body (2) is rotatably connected to a stopper (4) via a rotating shaft, and when the stopper (4) rotates to above the liquid adding port (101), the liquid adding port (101) is closed.

4. The grinding cup liquid nitrogen blowout prevention device according to claim 1, characterized in that: The surface of the cover body (2) is provided with an inverted cone-shaped insertion opening (102), and a grinding rod (8) is inserted into the insertion opening (102).

5. A grinding cup liquid nitrogen blowout prevention device according to claim 4, characterized in that: A rubber sleeve (3) is fixedly connected to the inner wall of the socket (102) and is used to compensate for the gap between the socket (102) and the grinding rod (8).

6. The grinding cup liquid nitrogen blowout prevention device according to claim 1, characterized in that: A chamber (103) is provided in the cover body (2).

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