CN112781906B

CN112781906B - Simple and convenient device for supercharged cleaning of EPR/NMR sample tubes

Info

Publication number: CN112781906B
Application number: CN202011529569.9A
Authority: CN
Inventors: 李晶鑫; 于璐; 张志涛; 童伟; 皮雳
Original assignee: Hefei Institutes of Physical Science of CAS
Current assignee: Hefei Institutes of Physical Science of CAS
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-10-28
Anticipated expiration: 2040-12-22
Also published as: CN112781906A

Abstract

The invention discloses a simple and convenient device for supercharged cleaning of EPR/NMR sample tubes, which comprises a base, wherein a supporting rod is fixed at the top of the base along the vertical direction, the supporting rod is connected with a horizontal baffle, and a locking piece is connected between the horizontal baffle and the supporting rod; the top end face of the base is downwards provided with a cavity, the bottom of the cavity is provided with a plurality of first connecting holes, and the outer side of the side wall of the base is provided with a plurality of second connecting holes towards the inside of the base along the horizontal direction; a needle seat is connected in the first connecting hole, a needle tube is fixed at the top of the needle seat along the vertical direction, and the needle tube and the needle seat are both of hollow structures; the base is connected with a cleaning pipeline through a second connecting hole; the cleaning pipeline is connected with a pressure container. The cleaning device provided by the invention mainly realizes high-pressure flushing by utilizing positive pressure of air pumped by the air pump, can simultaneously realize quick flushing and drying of a plurality of sample tubes, efficiently and quickly cleans the sample tubes, improves the experiment efficiency, enhances the experiment accuracy and is more convenient for experimenters to operate.

Description

Simple and convenient device for supercharged cleaning of EPR/NMR sample tubes

Technical Field

The invention relates to an EPR/NMR sample tube cleaning device, in particular to a simple and convenient pressurized device for cleaning EPR/NMR sample tubes, which can simultaneously realize rapid washing and drying of a plurality of sample tubes, and belongs to the technical field of electron paramagnetic resonance/nuclear magnetic resonance (EPR/NMR) measurement.

Background

Electron Paramagnetic Resonance (EPR) is the resonance absorption effect on incident microwaves when a sample with unpaired electrons is detected to undergo zeeman splitting at the energy level under the action of an external magnetic field. The sensitivity of EPR to electron spin is very high, if the sample cell washs unclean EPR spectrum just can appear the signal of impurity, so during the experiment, must ensure the cleanness of sample cell. Nuclear Magnetic Resonance (NMR) is a physical process in which nuclei with non-zero magnetic moments undergo zeeman splitting at their spin levels under the action of an external magnetic field, and resonate to absorb radio-frequency radiation of a certain frequency. Because EPR/NMR sample tubes are thin tubes with one ends sealed, the EPR/NMR sample tubes need to be cleaned after each test, and the cleaning work is very difficult. The common method for cleaning EPR sample tubes in laboratories is to manually wrap an alcohol sponge with iron wires and insert the sponge into the sample tubes for repeated scrubbing. Another commercially available NMR sample tube washing device washes sample tubes by using the principle of negative pressure formation, only one sample tube can be washed at a time, and the washing efficiency is low and limited by the size of the sample tube. The sample tube is manually cleaned for a long time, the sample tube can be damaged to a certain degree, the subsequent testing effect is influenced, most of existing cleaners on the market are high in cost and are not easy to operate.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a simple device for cleaning an EPR/NMR sample tube in a pressurizing manner, so as to improve the experiment efficiency, increase the experiment reliability and reduce the trouble of experimenters.

In order to achieve the purpose, the invention adopts the technical scheme that:

a simple and convenient device for supercharged cleaning of EPR/NMR sample tubes comprises a base, wherein a support rod is fixed on the top of the base along the vertical direction, the support rod is connected with a horizontal baffle, and a locking piece is connected between the horizontal baffle and the support rod; the top end face of the base is downwards provided with a cavity, the bottom of the cavity is provided with a plurality of first connecting holes, the outer side of the side wall of the base is provided with a plurality of second connecting holes towards the inside of the base along the horizontal direction, and the second connecting holes are in one-to-one correspondence with the first connecting holes and are mutually communicated; a needle seat is connected in the first connecting hole, a needle tube is fixed at the top of the needle seat along the vertical direction, and the needle tube and the needle seat are both of hollow structures; the base is connected with a cleaning pipeline through a second connecting hole; the cleaning pipeline is connected with a pressure container.

As a preferred technical scheme, the cleaning pipeline is connected with three cleaning inlets, namely a first inlet for inputting distilled water, a second inlet for inputting a cleaning agent and a third inlet for inputting gas; the three cleaning inlets are respectively provided with an independent valve, namely, the three cleaning inlets are connected in a three-inlet one-outlet mode, so that the free switching of liquid (distilled water, absolute ethyl alcohol or other) and gas (nitrogen) is realized; the pressure-resistant container is provided with a pressurizing port, a liquid outlet and a liquid supplementing port, wherein the pressurizing port is used for being connected with an air pump, and the purpose of pressurizing is achieved by the air pump; a glass guide pipe is arranged in the pressure-resistant container, one end of the glass guide pipe extends into the pressure-resistant container, the other end of the glass guide pipe extends into a liquid outlet, and the liquid outlet is connected with a first inlet of the cleaning pipeline through a PU plastic pipe; and a pressure gauge is also arranged on the pressure container. The pressure container can be pressurized, positive pressure is used for washing, the washing pressure is increased, the washing effect is improved, and the method is simple and efficient.

Preferably, the pressure vessel is made of a transparent material. So that the position of the liquid level inside the tank can be clearly observed and the liquid can be supplemented in time.

As a preferred technical scheme, a sewage draining outlet is further formed in the side wall of the base and is communicated with the cavity; the bottom surface of the cavity comprises two areas, namely a horizontal surface cleaning area for mounting the needle base and an inclined surface sewage discharge area for promoting sewage discharge, wherein the horizontal surface cleaning area is higher than the highest side of the inclined surface sewage discharge area; the lowest side of the inclined plane sewage discharge area faces the sewage discharge outlet. Through setting up inclined plane sewage discharge district, can in time discharge the washing waste liquid, can not cause the accumulation of washing waste liquid, prevent to wash the secondary pollution of waste liquid to the sample cell, improve the cleaning performance.

According to the preferable technical scheme, a second threaded hole is formed in the top surface of the side wall of the base, and the support rod is in threaded connection with the base through the second threaded hole.

As a preferred technical scheme, the supporting rod is columnar, the middle part of the horizontal baffle is provided with a mounting hole matched with the supporting rod, and the horizontal baffle can slide up and down along the supporting rod in the vertical direction through the mounting hole; the locking piece is a locking bolt; the horizontal baffle is further provided with a first threaded hole communicated with the mounting hole, and the locking bolt is in threaded connection with the horizontal baffle through the first threaded hole. Through the elasticity of adjusting the locking bolt, can adjust the connected state between horizontal baffle and the bracing piece, reach the purpose of adjusting its relative position. The operation is as follows: when the height of the horizontal baffle needs to be adjusted, the locking bolt is unscrewed, so that the horizontal baffle and the supporting rod are in a movable connection state, and the horizontal baffle can be adjusted to a target position at the moment; and then the locking bolt is screwed to enable the horizontal baffle and the supporting rod to be in a fixed connection state. The bracing piece is including the installation department that is used for being connected with the base and the connecting portion that are used for being connected with horizontal baffle, installation department and connecting portion are connected through the lock nut. The free angle rotation of connecting portion can be realized to the lock female connection, makes things convenient for getting of sample cell to put.

As a preferable technical scheme, a rubber pad is fixed at the bottom of the horizontal baffle. The horizontal baffle is used for fixing the position of the sample tube in the process of washing the sample tube to prevent the sample tube from flying out due to pressure impact in the washing process, and the rubber pad is fixed at the bottom of the horizontal baffle to play a role in buffering the bottom of the washed sample tube, prevent the sample tube from being broken by pressure and prolong the service life of the sample tube.

As preferred technical scheme, the outside of needle file is equipped with the needle file protective sheath, and the impurity that the needle file protective sheath can prevent to wash drops in the needle file, and the experiment is convenient clean, need not to wash.

It should be noted that the needle tube, the needle seat and the like are all commercially available products, and products with different sizes can be selected according to experimental requirements.

The invention has the following beneficial effects:

the pressurized simple device for cleaning EPR/NMR sample tubes provided by the invention mainly utilizes positive pressure of air pumped by the air pump to realize high-pressure washing, can simultaneously realize quick washing and drying of a plurality of sample tubes, efficiently and quickly cleans the sample tubes, can ensure the cleanness of the sample tubes in the cleaning process, effectively prevents impurities from remaining in the sample tubes, improves the experimental efficiency, enhances the experimental accuracy and is more convenient for experimenters to operate. The pressure-charged simple device for cleaning the EPR/NMR sample tube can not only wash the sample tube containing liquid, but also wash the sample tube containing solid powder, and meets the diversity selection of test conditions.

Drawings

FIG. 1 is a schematic view of the connection structure of the base and the support rod in the convenient device provided by the present invention;

FIG. 2 is a schematic structural diagram of a base;

FIG. 3 is a cross-sectional view of the base;

FIG. 4 is a schematic view showing a connection structure of a cleaning pipe and a pressure vessel;

FIG. 5 is a schematic structural view of a horizontal baffle;

reference numerals are as follows: 1-base, 101-cavity, 102-first connecting hole, 103-second connecting hole, 104-sewage draining outlet, 105-horizontal cleaning area, 106-inclined surface sewage draining area, 107-second threaded hole, 2-support rod, 201-mounting part, 202-connecting part, 203-locking nut, 3-horizontal baffle, 4-locking part, 5-needle seat, 6-needle tube, 7-cleaning pipeline, 701-first inlet, 702-second inlet, 703-third inlet, 704-valve, 8-mounting hole, 9-first threaded hole, 10-pressure-resistant container, 11-pressurizing port, 12-liquid outlet, 13-liquid supplementing port, 14-air pump, 15-glass conduit and 16-pressure gauge.

Detailed Description

The invention is further described with reference to the following figures and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the appended drawings to indicate orientations and positional relationships, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting. The terms "first," "second," and "third" do not denote any particular quantity or order, but rather are used to distinguish one element from another.

Referring to fig. 1 to 5, a simple pressurized device for cleaning an EPR/NMR sample tube comprises a base 1, wherein a support rod 2 is fixed on the top of the base 1 along the vertical direction, the support rod 2 is connected with a horizontal baffle 3, and a locking member 4 is connected between the horizontal baffle 3 and the support rod 2; preferably, a rubber pad is fixed at the bottom of the horizontal baffle 3, the horizontal baffle 3 is used for fixing the position of the sample tube in the washing process of the sample tube to prevent the sample tube from flying out due to pressure impact in the washing process, and the rubber pad is fixed at the bottom of the horizontal baffle to play a role in buffering the washed bottom of the sample tube, prevent the sample tube from being broken by pressure and prolong the service life of the sample tube. The top end face of the base 1 is downwards provided with a cavity 101, the bottom of the cavity 101 is provided with a plurality of first connecting holes 102, the outer side of the side wall of the base 1 is provided with a plurality of second connecting holes 103 towards the inside of the base along the horizontal direction, and the second connecting holes 103 are in one-to-one correspondence with the first connecting holes 102 and are mutually communicated; a needle seat 5 is connected in the first connecting hole 102, a needle tube 6 is fixed on the top of the needle seat 5 along the vertical direction, and the needle tube 6 and the needle seat 5 are both hollow structures; further, the outside of needle file 5 is equipped with the needle file protective sheath (not seen in the figure), and the impurity that the needle file protective sheath can prevent to wash drops in the needle file, and the experiment is convenient clean, need not to wash. The base 1 is connected to a cleaning duct 7 through a second connection hole 103. Preferably, the cleaning pipeline 7 is connected with three cleaning inlets, which are respectively a first inlet 701 for inputting distilled water, a second inlet 702 for inputting cleaning agent and a third inlet 703 for inputting gas; independent valves 704 are respectively arranged on the three cleaning inlets; namely, the connection is carried out by adopting a three-in one-out mode, so that the free switching between liquid (distilled water, absolute ethyl alcohol or other cleaning agents) and gas (nitrogen) is realized. The cleaning pipeline is connected with a pressure container 10, the pressure container 10 is provided with a pressurizing port 11, a liquid outlet 12 and a liquid supplementing port 13, the pressurizing port 11 is used for being connected with an air pump 14, and the purpose of pressurizing is achieved by the air pump 14; a glass guide pipe 15 is arranged in the pressure-resistant container 10, one end of the glass guide pipe 15 extends into the pressure-resistant container 10, the other end of the glass guide pipe 15 extends into a liquid outlet 12, and the liquid outlet 12 is connected with a first inlet 701 of a cleaning pipeline through a PU plastic pipe; a pressure gauge 16 is also mounted on the pressure container 10. The pressure vessel 10 can be pressurized, and positive pressure is used for flushing, so that the flushing pressure is increased, the cleaning effect is improved, and the method is simple and efficient. The pressure vessel 10 can be made of transparent material so that the position of the liquid level inside can be clearly observed and the liquid can be supplemented in time.

Further, a sewage draining outlet 104 is formed in the side wall of the base 1, and the sewage draining outlet 104 is communicated with the cavity 101; the bottom surface of the cavity 101 comprises two areas, namely a horizontal surface cleaning area 105 for mounting the needle seat 5 and an inclined surface sewage discharge area 106 for promoting sewage discharge, wherein the height of the horizontal surface cleaning area 105 is higher than that of the highest side of the inclined surface sewage discharge area 106; the lowest side of the inclined surface sewage drain area 106 faces the sewage drain 104. The cleaning waste liquid can be timely discharged by arranging the inclined surface sewage discharge area 106, the accumulation of the cleaning waste liquid cannot be caused, the secondary pollution of the cleaning waste liquid to the sample tube is prevented, and the cleaning effect is improved.

As a preferred embodiment, the supporting rod 2 is columnar, the middle part of the horizontal baffle 3 is provided with a mounting hole 8 matched with the supporting rod 2, and the horizontal baffle 3 can slide up and down along the supporting rod 2 in the vertical direction through the mounting hole 8; the locking piece 4 is a locking bolt; the horizontal baffle 3 is further provided with a first threaded hole 9 communicated with the mounting hole 8, and the locking bolt is in threaded connection with the horizontal baffle 3 through the first threaded hole 9. Through the elasticity of adjusting the locking bolt, can adjust the connected state between horizontal baffle and the bracing piece, reach the purpose of adjusting its relative position. The operation is as follows: when the height of the horizontal baffle 3 needs to be adjusted, the locking bolt is loosened to enable the horizontal baffle and the supporting rod to be in a movable connection state, and at the moment, the horizontal baffle can be adjusted to a target position; and then the locking bolt is screwed to enable the horizontal baffle and the supporting rod to be in a fixed connection state.

In a preferred embodiment, the top surface of the sidewall of the base 1 is opened with a second screw hole 107, and the support rod 2 is screwed with the base 1 through the second screw hole 107. The bracing piece 2 is including being used for the installation department 201 of being connected with base 1 and being used for the connecting portion 202 of being connected with horizontal baffle 3, installation department 201 and connecting portion 202 are connected through locking female 203, can realize the free angle rotation of connecting portion 202 (drive horizontal baffle promptly), make things convenient for getting of sample cell to put.

The using method of the cleaner comprises the following steps:

putting EPR or NMR sample tubes to be cleaned on the needle tube 6 in turn, and then adjusting the position of the horizontal baffle 3 to ensure that the horizontal baffle 3 is positioned right above the sample tubes. Injecting distilled water into the pressure-resistant container through the liquid supplementing hole, opening an air pump to observe a pressure gauge, then opening a valve at a first inlet 701, opening a valve of a cleaning pipeline 7, pressurizing by using the air pump to flush the sample tube, flushing the sample tube to a baffle position in the process, continuously flushing for 1-2min, and then closing the valve 704; if grease impurities which are difficult to clean and remove by water exist in the sample tube, a specific cleaning agent or a cleaning agent can be input into the tube through the second inlet 702 for flushing; and finally, opening a nitrogen steel cylinder and a valve at a third inlet 703, inputting nitrogen into the sample tube, flushing and drying the sample tube by utilizing flowing gas, and observing whether water drops exist in the tube. Closing all the valves, rotating the horizontal baffle 3 at the upper part to the other side, taking out the cleaned sample tube, covering the tube cap, wiping the needle tube by alcohol, and rotating the baffle back to the original position.

This simple and convenient device of pressurized washing EPR NMR sample cell can realize accomplishing the washing of a plurality of sample cells simultaneously, can guarantee the cleanness of EPR NMR sample cell moreover in the cleaning process, and the scavenging period shortens controllable, improves the experimental efficiency, and the reinforcing experiment degree of accuracy makes things convenient for the experimenter to operate more. In addition, the bottom of the needle tube is provided with a needle seat protective sleeve, so that the EPR/NMR sample tube cleaner after cleaning is not required to be subjected to subsequent cleaning treatment, and the needle tube is only required to be wiped by alcohol when the sample tube is replaced.

Claims

1. The utility model provides a simple and convenient device of pressurized washing EPR/NMR sample cell which characterized in that: the device comprises a base, wherein a supporting rod is fixed on the top of the base along the vertical direction, the supporting rod is connected with a horizontal baffle, and a locking piece is connected between the horizontal baffle and the supporting rod; the top end face of the base is downwards provided with a cavity, the bottom of the cavity is provided with a plurality of first connecting holes, the outer side of the side wall of the base is provided with a plurality of second connecting holes towards the inside of the base along the horizontal direction, and the second connecting holes are in one-to-one correspondence with the first connecting holes and are mutually communicated; a needle seat is connected in the first connecting hole, a needle tube is fixed at the top of the needle seat along the vertical direction, and the needle tube and the needle seat are both of hollow structures; the base is connected with a cleaning pipeline through a second connecting hole, and the cleaning pipeline is connected with a pressure container;

a sewage draining outlet is also formed in the side wall of the base and is communicated with the cavity; the bottom surface of the cavity comprises two areas, namely a horizontal surface cleaning area for mounting the needle seat and an inclined surface sewage discharge area for promoting sewage discharge, wherein the height of the horizontal surface cleaning area is higher than that of the highest side of the inclined surface sewage discharge area; the lowest side of the sewage discharge area with the inclined surface faces the sewage discharge port;

a rubber pad is fixed at the bottom of the horizontal baffle;

the supporting rod is columnar, the middle part of the horizontal baffle is provided with a mounting hole matched with the supporting rod, and the horizontal baffle can slide up and down along the supporting rod in the vertical direction through the mounting hole; the locking piece is a locking bolt; the horizontal baffle is further provided with a first threaded hole communicated with the mounting hole, and the locking bolt is in threaded connection with the horizontal baffle through the first threaded hole.

2. The simplified apparatus for pressurized cleaning of EPR/NMR sample tubes as claimed in claim 1, wherein: the cleaning pipeline is connected with three cleaning inlets, namely a first inlet for inputting distilled water, a second inlet for inputting a cleaning agent and a third inlet for inputting gas; the three cleaning inlets are respectively provided with an independent valve;

the pressure-resistant container is provided with a pressurizing port, a liquid outlet and a liquid supplementing port, and the pressurizing port is used for being connected with an air pump; a glass guide pipe is arranged in the pressure-resistant container, one end of the glass guide pipe extends into the pressure-resistant container, the other end of the glass guide pipe extends into a liquid outlet, and the liquid outlet is connected with a first inlet of the cleaning pipeline through a PU plastic pipe; and a pressure gauge is also arranged on the pressure container.

3. A convenient means for pressurized cleaning of EPR/NMR sample tubes according to any of claims 1-2, wherein: a needle seat protective sleeve is arranged outside the needle seat.

4. A convenient means for pressurized cleaning of EPR/NMR sample tubes according to any of claims 1-2, wherein: and a second threaded hole is formed in the top surface of the side wall of the base, and the support rod is in threaded connection with the base through the second threaded hole.

5. The convenient apparatus for pressurized cleaning of EPR/NMR sample tubes according to any of claims 1-2, wherein: the bracing piece is including the installation department that is used for being connected with the base and the connecting portion that are used for being connected with horizontal baffle, installation department and connecting portion are connected through the lock nut.

6. The simplified apparatus for pressurized cleaning of EPR/NMR sample tubes according to claim 5, wherein: the support rod is made of stainless steel.

7. The convenient apparatus for pressurized cleaning of EPR/NMR sample tubes according to any of claims 1-2, wherein: the pressure-resistant container is made of transparent materials.