CN220176932U - High-air-tightness nuclear magnetic cap - Google Patents
High-air-tightness nuclear magnetic cap Download PDFInfo
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- CN220176932U CN220176932U CN202321206753.9U CN202321206753U CN220176932U CN 220176932 U CN220176932 U CN 220176932U CN 202321206753 U CN202321206753 U CN 202321206753U CN 220176932 U CN220176932 U CN 220176932U
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- filling channel
- cap
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- 238000007789 sealing Methods 0.000 claims description 24
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- 238000005481 NMR spectroscopy Methods 0.000 description 8
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- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical compound CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the field of nuclear magnetic experimental devices, and discloses a high-air-tightness nuclear magnetic cap which is matched with a general nuclear magnetic tube. The utility model can be matched with a general nuclear magnetic tube for use and has the advantages of simple structure, high air tightness, low cost and strong applicability.
Description
Technical Field
The utility model relates to the field of nuclear magnetic experimental devices, in particular to a nuclear magnetic cap with high air tightness.
Background
Nuclear magnetic resonance spectroscopy (NMR) is a non-destructive analysis technique that does not destroy samples, and is one of the strongest tools for qualitative analysis of the composition and structure of various organic and inorganic substances, and sometimes quantitative analysis can be performed. Therefore, nuclear magnetic resonance has been widely used in organic chemistry, biology, medicine and other disciplines as the most important means for detecting and identifying the structure of organic compounds, and plays an important role in various fields.
In experiments, the sample to be tested needs to be placed in a specific container (typically a nuclear magnetic tube) to perform a nuclear magnetic test. The standard nuclear magnetic resonance tube is a tubular structure with an outer diameter of 5mm and a length of 18cm. Because of certain difference of wall thickness of the nuclear magnetic pipes produced by different manufacturers, the inner diameter of the nuclear magnetic pipes is usually 3mm-4.5mm. Some samples which are highly sensitive to air and moisture, such as metal organic compounds, need to keep the high air tightness of the nuclear magnetic tube when performing nuclear magnetic testing, so that the failure of testing caused by the damage of the molecular structure of the sample by external air is prevented, and the key for determining whether the air tightness of the nuclear magnetic tube is good is the nuclear magnetic cap.
The prior common nuclear magnetic cap is difficult to ensure high air tightness, the high air tightness nuclear magnetic cap is often complex in structure and needs to be matched with a nuclear magnetic tube with a specific structure (such as a J. Young nuclear magnetic tube, the structure of the nuclear magnetic cap and the nuclear magnetic tube is complex, and the price is high), and a large amount of nuclear magnetic tubes with complex structures and high price are used in experiments, so that the experimental operation difficulty is increased, the experimental cost is greatly increased, and the improvement is needed.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model aims to provide the high-air-tightness nuclear magnetic cap which has the advantages of simple structure and high air tightness, can be matched with a general nuclear magnetic tube for use, is simple to operate, low in cost and high in applicability, and is convenient for large-area popularization and application.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a high gas tightness nuclear magnetic resonance cap, uses with nuclear magnetic resonance tube cooperation, includes the lid and the main part of an organic whole setting, the main part is kept away from the one end of the lid and is inserted in the nuclear magnetic resonance tube and the inner wall of nuclear magnetic resonance tube is hugged closely to the lateral wall of main part.
The utility model is further provided with: the main body is provided with a pressure slow-release cavity communicated with the nuclear magnetic tube, and the diameter of the pressure slow-release cavity is 0.5-6mm.
The utility model is further provided with: at least two sealing spiral rings are arranged on the outer edge of the main body, and the sealing spiral rings and the main body are integrally arranged.
The utility model is further provided with: the main body and the cap body are provided with pressure slow release cavities communicated with the outside, and the diameters of the pressure slow release cavities are 0.5-6mm.
The utility model is further provided with: at least two sealing spiral rings are arranged on the outer edge of the main body, and the sealing spiral rings and the main body are integrally arranged.
The utility model is further provided with: the magnetic core tube comprises a cap body, a core tube, a first pumping and filling channel, a second pumping and filling channel, a first pumping and filling channel and a second pumping and filling channel, wherein the first pumping and filling channel and the second pumping and filling channel are communicated with each other; the outer diameter of the hollow pipe is matched with the inner diameter of the first pumping and filling channel, the hollow pipe is vertically inserted into the first pumping and filling channel and can reciprocate along the first pumping and filling channel, the inner diameter of the limiting groove is the same as that of the first pumping and filling channel, the limiting groove is located right below the first pumping and filling channel, and the bottom of the limiting groove is lower than the bottom of the second pumping and filling channel.
The utility model is further provided with: still including taking out and filling the structure, take out and fill the structure and fill the passageway and the second of taking out and filling including spacing draw-in groove, dead lever and the first passageway of taking out and filling that communicate each other, first taking out and filling the passageway is vertical to run through the cap body and go deep into inside the main part, the second is taken out and is filled passageway one end intercommunication first taking out and filling passageway and the other end intercommunication nuclear magnetic tube, the dead lever sets up on the cap body just the first passageway of taking out and filling of dead lever intercommunication, the external diameter of dead lever and the internal diameter looks adaptation of spacing draw-in groove, the dead lever inserts spacing draw-in groove and can follow spacing draw-in groove reciprocating motion.
The utility model is further provided with: the cap body and the main body are made of fluororubber materials.
The utility model is further provided with: the cap body and the main body are made of perfluoroether rubber materials.
The utility model is further provided with: the surface of the main body and the surface of the cap body are both provided with a coating layer made of a high polymer material which can be in direct contact with an organic solvent.
In summary, the beneficial effects achieved by the utility model are as follows:
(1) The nuclear magnetic cap is only composed of a cap body and a main body, has a simple structure, can be directly spliced and matched with a standard nuclear magnetic, is convenient to operate and has low production cost;
(2) The pressure slow release cavity and the sealing spiral ring on the outer edge of the main body can play a role in slow release of pressure in the process of inserting the nuclear magnetic cap into the nuclear magnetic tube, and the sealing spiral ring on the outer edge of the main body also provides a plurality of airtight chambers, so that the sealing effect of the nuclear magnetic cap on the nuclear magnetic tube is further enhanced;
(3) After the nuclear magnetic cap is inserted into the nuclear magnetic tube, the pumping and filling structure arranged on the nuclear magnetic cap can pump or fill gas or low boiling point solvent into the nuclear magnetic tube on the premise of maintaining the air tightness in the nuclear magnetic tube;
(4) The cap body and the main body of the nuclear magnetic cap are made of fluororubber materials or the surfaces of the main body and the cap body are provided with coating layers made of high polymer materials, so that the nuclear magnetic cap can obtain the capability of resisting corrosion of organic solvents by utilizing the characteristics of excellent mechanical properties, high temperature resistance, oil resistance and resistance to corrosion of various chemicals of fluororubber or high polymer materials.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a cross-sectional view of a nuclear magnetic cap inserted into a nuclear magnetic tube according to a first embodiment of the present utility model;
FIG. 2 is a cross-sectional view of a nuclear magnetic cap according to a first embodiment of the present utility model;
FIG. 3 is a cross-sectional view of a nuclear magnetic cap in accordance with a second embodiment of the present utility model;
FIG. 4 is a cross-sectional view of a nuclear magnetic cap in accordance with a third embodiment of the present utility model;
FIG. 5 is a cross-sectional view of a nuclear magnetic cap in accordance with a fourth embodiment of the present utility model;
FIG. 6 is a cross-sectional view of a nuclear magnetic cap with a pumping and charging structure in a closed state according to a fifth embodiment of the present utility model;
FIG. 7 is a cross-sectional view of a nuclear magnetic cap with a pumping and charging structure in an open state according to a fifth embodiment of the present utility model;
FIG. 8 is a cross-sectional view of a nuclear magnetic cap with a pumping and charging structure in a closed state according to a sixth embodiment of the present utility model;
FIG. 9 is a cross-sectional view of a nuclear magnetic cap with a pumping and charging structure in an open state according to a sixth embodiment of the present utility model;
fig. 10 is a cross-sectional view of a nuclear magnetic cap having a cladding layer in a seventh embodiment of the present utility model.
In the figure: 1. a cap body; 2. a main body; 21. sealing the spiral ring; 22. a pressure sustained release cavity; 3. a pumping and filling structure; 31. a first pumping and charging channel; 32. a second pumping and charging channel; 33. a limit groove; 34. a hollow tube; 35. a limit clamping groove; 36. a closing rod; 4. a nuclear magnetic tube; 5. and a coating layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. For ease of description, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "inner," "outer," "bottom," and the like as used herein refer to an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The embodiments of the present utility model and the features of the embodiments may be combined with each other without any conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1 and 2, a nuclear magnetic cap with high air tightness is matched with a nuclear magnetic tube 4, and the nuclear magnetic cap comprises a cap body 1 and a main body 2 which are integrally arranged.
The nuclear magnetic tube 4 is of a cylindrical tubular structure with one end closed and the other end open, and the outer diameter of the universal nuclear magnetic tube 4 is 5mm and the length is 18cm. Because of the difference in wall thickness of the nuclear magnetic tube 4 produced by different manufacturers, the inner diameter of the nuclear magnetic tube 4 is typically 3mm-4.5mm, and in this embodiment, the inner diameter of the nuclear magnetic tube 4 is 4.14mm.
The main body 2 is of a cylindrical long strip structure, and one end of the main body, which is far away from the cap body 1, is provided with an arc end so as to be conveniently inserted into the nuclear magnetic tube 4. The outer diameter of the main body 2 is not smaller than the inner diameter of the nuclear magnetic tube 4, so that the side wall of the main body 2 can be fully contacted with the inner wall of the nuclear magnetic tube 4 after the main body 2 is inserted into the nuclear magnetic tube 4, the opening of the nuclear magnetic tube 4 is completely closed, and good air tightness is maintained. In this embodiment, the outer diameter of the main body 2 is designed to be 4.3 mm, so that the outer diameter of the main body 2 is slightly larger than the inner diameter of the nuclear magnetic tube 4, and the numerical range of the outer diameter of the main body 2 can be controlled between 3mm and 4.5mm according to practical situations so as to match the nuclear magnetic tubes 4 with different inner diameters.
The cap body 1 is cylindrical, the diameter of the cap body is larger than the outer diameter of the nuclear magnetic tube 4, and after the main body 2 is completely inserted into the nuclear magnetic tube 4, the lower edge of the cap body 1 is tightly attached to and tightly pressed against the port of the nuclear magnetic tube 4, so that the opening of the nuclear magnetic tube 4 is further closed, and good air tightness is maintained.
The nuclear magnetic cap can be made of rubber materials such as natural rubber, in the embodiment, the cap body 1 and the main body 2 which form the nuclear magnetic cap are made of fluororubber materials with elastic deformation capability, and preferably, the cap body 1 and the main body 2 are made of perfluoroether rubber materials, so that the nuclear magnetic cap has the characteristics of high temperature resistance, oil resistance, high vacuum resistance, acid and alkali resistance and multiple chemical resistance.
The fluororubber is a synthetic polymer elastomer containing fluorine atoms on carbon atoms of a main chain or a side chain. The introduction of fluorine atoms endows the rubber with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, is widely applied to the fields of aerospace, aviation, automobiles, petroleum, household appliances and the like, and is a key material which cannot be replaced in the national defense industry. With research and application of fluororubbers, various types such as polyolefin fluororubbers, nitrosofluororubbers, tetrapropylethylene fluororubbers, phosphazene fluororubbers, and perfluoroether rubbers have been developed.
The implementation principle of the embodiment is as follows:
in the nuclear magnetic experiment, after a sample sensitive to air and moisture is placed in a nuclear magnetic tube 4, the main body 2 of the nuclear magnetic cap is fully inserted into the nuclear magnetic tube 4 until the lower edge of the cap body 1 is tightly attached to the port of the nuclear magnetic tube 4, at this time, the outer edge of the main body 2 is fully contacted with the inner wall of the nuclear magnetic tube 4, the lower edge of the cap body 1 is fully contacted with the port of the nuclear magnetic tube 4, the opening of the nuclear magnetic tube 4 is fully closed, and the good air tightness of the nuclear magnetic tube 4 is maintained. Meanwhile, the nuclear magnetic cap can obtain the capability of resisting the corrosion of the organic solvent by utilizing the characteristics of excellent mechanical property, high temperature resistance, oil resistance and resistance to the corrosion of various chemicals of fluororubber.
Example two
As shown in fig. 3, in the nuclear magnetic cap with high air tightness disclosed in the present utility model, unlike the first embodiment, at least two sealing spiral rings 21 are provided on the outer edge of the main body 2.
The sealing spiral ring 21 is a lamellar structure which is horizontally distributed and integrally arranged with the main body 2, and the material of the sealing spiral ring is the same as that of the main body 2. The end of the sealing spiral ring 21 far away from the main body 2 can be designed into a square block structure or a circular arc-shaped hemispheroidal structure according to practical requirements. In the present embodiment, five seal spiral rings 21 are provided at equal intervals along the length direction of the main body 2.
The diameter of the sealing spiral ring 21 added to the main body 2 is not smaller than the inner diameter of the nuclear magnetic tube 4. In this embodiment, the outer diameter of the main body 2 may be designed to be 3.3 mm so that the combined diameter of the sealing spiral ring 21 and the main body 2 reaches 4.3 mm, which is slightly larger than the outer diameter of the nuclear magnetic tube 4.
The implementation principle of the embodiment is as follows:
the sealing spiral ring 21 on the outer edge of the main body 2 not only can play a role in slowly releasing pressure in the process of inserting the nuclear magnetic cap into the nuclear magnetic tube 4, but also provides a plurality of airtight chambers, and further enhances the sealing effect of the nuclear magnetic cap on the nuclear magnetic tube 4.
Example III
As shown in fig. 4, in the nuclear magnetic cap with high air tightness disclosed by the utility model, unlike the second embodiment, a pressure slow release cavity 22 which is opened upwards and communicated with the outside is arranged at the center of the main body 2 and the cap body 1.
The pressure slow release cavity 22 is a long strip column cavity and is positioned at the center of the main body 2 and the cap body 1, and the center line of the pressure slow release cavity 22 coincides with the center line of the main body 2 or the cap body 1.
The diameter of the pressure slow-release cavity 22 is in the range of 0.5-6mm to match the nuclear magnetic tube 4 with different specifications. In the present embodiment, the diameter of the pressure releasing chamber 22 is 1.3mm, and the outer diameter of the main body 2 is designed to be 4.3 mm, so that the main body 2 is a thin-walled structure with a wall thickness of 1.5 mm.
In some other embodiments, the main body 2 and the cap body 1 may be made of polytetrafluoroethylene, high molecular weight polyethylene, ethylene-vinyl acetate copolymer, and the like. In particular, when the materials of the main body 2 and the cap body 1 are fluororubber, the diameter of the pressure slow-release cavity 22 ranges from 0.5mm to 3 mm; when the main body 2 and the cap body 1 are made of plastics such as polytetrafluoroethylene, the diameter of the pressure slow-release cavity 22 is in the range of 1.5-4.9 mm.
The implementation principle of the embodiment is as follows:
unlike the first embodiment, in the process of inserting the main body 2 part of the nuclear magnetic cap into the nuclear magnetic tube 4, the pressure release cavity 22 is hollow in the main body 2, so that the pressure release cavity can play a role in releasing pressure, and the resistance of the main body 2 inserted into the nuclear magnetic tube 4 is reduced by inwards recessing and deforming the main body 2 part to a certain extent, so that the experimental operation is convenient.
Example IV
As shown in fig. 5, in the nuclear magnetic cap with high air tightness disclosed in the present utility model, unlike the third embodiment, the pressure slow release cavity 22 is provided on the main body 2 and the pressure slow release cavity 22 is opened downward and is communicated with the nuclear magnetic tube 4.
The centre line of the pressure release chamber 22 coincides with the centre axis of the body 2, and the diameter of the pressure release chamber 22 ranges between 0.5 and 6mm.
In some other embodiments, the main body 2 and the cap body 1 may be made of polytetrafluoroethylene, high molecular weight polyethylene, ethylene-vinyl acetate copolymer, and the like. In particular, when the materials of the main body 2 and the cap body 1 are fluororubber, the diameter of the pressure slow-release cavity 22 ranges from 0.5mm to 3 mm; when the main body 2 and the cap body 1 are made of plastics such as polytetrafluoroethylene, the diameter of the pressure slow-release cavity 22 is in the range of 1.5-4.9 mm.
The implementation principle of the embodiment is as follows:
in the process of inserting the main body 2 part of the nuclear magnetic cap into the nuclear magnetic tube 4, an operator can set the pressure slow-release cavity 22 to play a role in slow-release pressure, and the resistance of the main body 2 inserted into the nuclear magnetic tube 4 is reduced by inwards sinking and deforming the main body 2 part to a certain extent, so that experimental operation is facilitated.
Example five
As shown in fig. 6 and 7, a nuclear magnetic cap with high air tightness is disclosed, and unlike the first embodiment, the nuclear magnetic cap further comprises a pumping structure 3 for pumping or filling gas or low boiling point solvent into the nuclear magnetic tube 4.
The pumping and charging structure 3 includes a hollow tube 34, a first pumping and charging channel 31 and a second pumping and charging channel 32 which are communicated with each other.
The first pumping and charging channel 31 is a cylindrical channel, vertically penetrates through the cap body 1 and goes deep into the main body 2, and the central axis of the first pumping channel 31 coincides with the central axes of the main body 2 and the cap body 1.
The second pumping and charging channel 32 is a cylindrical channel arranged horizontally, one end of which is communicated with the first pumping and charging channel 31 and the other end of which is communicated with the nuclear magnetic tube 4.
The hollow tube 34 is a cylindrical hollow tubular structure, and the outer diameter of the hollow tube is adapted to the inner diameter of the first pumping and charging channel 31, so that the hollow tube 34 can be vertically inserted into the first pumping and charging channel 31 and can reciprocate up and down along the first pumping and charging channel 31.
The pumping and filling structure 3 further comprises a limiting groove 33, and the limiting groove 33 is arranged right below the first pumping pipeline. The inner diameter of the limit groove 33 is the same as that of the first pumping and charging channel 31, and the bottom of the limit groove 33 is lower than that of the second pumping and charging channel 32, so that the communication state of the first pumping and charging channel 31 and the second pumping and charging channel 32 can be cut off after the hollow tube 34 is inserted into the limit groove 33, and the air tightness in the nuclear magnetic tube 4 is ensured.
The length of the hollow tube 34 is greater than the sum of the length of the first suction passage 31 and the length of the limit groove 33 so that the top end of the hollow tube 34 always protrudes from the cap body 1.
The implementation principle of the embodiment is as follows:
after the nuclear magnetic cap is inserted into the nuclear magnetic tube 4, the pumping and filling structure 3 arranged on the nuclear magnetic cap can pump or fill gas or low boiling point solvent into the nuclear magnetic tube 4 on the premise of maintaining the air tightness in the nuclear magnetic tube 4. The specific operation is as follows: pulling the hollow tube 34 out of the limit groove 33, wherein the first pumping and charging channel 31 and the second pumping and charging channel 32 are in a communicating state; because the second pumping and charging channel 32 is communicated with the inside of the nuclear magnetic tube 4, the hollow tube 34 is communicated with the first pumping and charging channel 31, namely, the operation of pumping or charging gas or low boiling point solvent into the nuclear magnetic tube 4 is realized on the premise of not opening the nuclear magnetic cap;
when the operation is completed, the hollow tube 34 is completely inserted into the limit groove 33, and the outer wall of the hollow tube 34 can cut off the communication state of the first pumping and charging channel 31 and the second pumping and charging channel 32, so as to ensure the air tightness in the nuclear magnetic tube 4.
Example six
As shown in fig. 8 and 9, the present utility model discloses a nuclear magnetic cap with high air tightness, which is different from the fifth embodiment in that the pumping and charging structure 3 is composed of a limit clamping groove 35, a closing rod 36, a first pumping and charging channel 31 and a second pumping and charging channel 32.
The limiting clamping groove 35 is a cylindrical channel and is horizontally arranged on the cap body 1, and the limiting clamping groove 35 is communicated with the first pumping and charging channel 31.
The closing rod 36 is in a cylindrical rod-shaped structure, and the outer diameter of the closing rod is matched with the inner diameter of the limiting clamping groove 35, so that the closing rod 36 is inserted into the limiting clamping groove 35 and can reciprocate along the limiting clamping groove 35. The length of the closing rod 36 is greater than the distance between the first pumping channel 31 and the side wall of the cap body, so that the closing rod 36 always protrudes out of the cap body.
The implementation principle of the embodiment is as follows:
after the nuclear magnetic cap is inserted into the nuclear magnetic tube 4, the pumping and filling structure 3 arranged on the nuclear magnetic cap can pump or fill gas or low boiling point solvent into the nuclear magnetic tube 4 on the premise of maintaining the air tightness in the nuclear magnetic tube 4. The specific operation is as follows: pulling the closing rod 36 towards a direction away from the first pumping and charging channel 31, wherein the first pumping and charging channel 31 is in a communicating state with the external environment; the operation of directly pumping or filling gas or low boiling point solvent into the nuclear magnetic tube 4 through the first pumping and filling channel 31 and the second pumping and filling channel 32;
when the operation is completed, the sealing rod 36 is pushed towards the first pumping and charging channel 31, and the sealing rod 36 can cut off the communication state between the first pumping and charging channel 31 and the external environment, so as to ensure the air tightness in the nuclear magnetic tube 4.
Example seven
As shown in fig. 10, in the nuclear magnetic cap with high air tightness disclosed in the present utility model, unlike the first embodiment, the surface of the main body 2 and the surface of the cap body 1 are both provided with a coating layer 5 made of a polymer material that can be in direct contact with an organic solvent, and the inner core materials of the main body 2 and the cap body 1 can be common rubber materials, such as low temperature resistant silicone rubber.
The thickness of the coating layer 5 ranges between 0.1-2mm, in this embodiment the thickness of the coating layer 5 is preferably 0.3mm. The diameter of the cladding layer 5 added to the main body 2 is not smaller than the inner diameter of the nuclear magnetic tube 4. In this embodiment, the outer diameter of the main body 2 may be designed to be 3.7 and mm, so that the diameter of the combination of the cladding 5 and the main body 2 reaches 4.3 and mm, which is slightly larger than the outer diameter of the nuclear magnetic tube 4.
In some other embodiments, the coating layer 5 may be made of polytetrafluoroethylene, high molecular weight polyethylene, ethylene-vinyl acetate copolymer, etc., and the inner core material may be a common rubber material such as a low temperature resistant silicone rubber material or plastic. Particularly, when the material of the cladding layer 5 is fluororubber, the thickness of the cladding layer 5 is preferably 1.5mm, and the inner core material may be a common rubber material such as a low temperature resistant silicone rubber material, or a plastic, preferably a low temperature resistant silicone rubber material; when the material of the coating layer 5 is made of plastic material such as polytetrafluoroethylene, the thickness of the coating layer 5 is preferably 0.5mm, and the core material is made of elastic rubber material.
In some other embodiments, an adhesive layer may be added between the cladding layer 5 and the core material according to practical situations, or a sealing spiral ring 21 may be provided on the outer edge of the main body 2 of the nuclear magnetic cap with the cladding layer 5.
The implementation principle of the embodiment is as follows:
because the inner core material of the nuclear magnetic cap is not directly contacted with the test sample, the purpose of enabling the nuclear magnetic cap to obtain the corrosion resistance of the organic solvent can be achieved by only arranging the coating layer 5 made of the fluororubber material on the surface of the main body 2 and the surface of the cap body 1.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. The high-air-tightness nuclear magnetic cap is matched with a nuclear magnetic tube (4) to be used, and is characterized by comprising a cap body (1) and a main body (2) which are integrally arranged, wherein one end, far away from the cap body (1), of the main body (2) is inserted into the nuclear magnetic tube (4), and the side wall of the main body (2) is tightly attached to the inner wall of the nuclear magnetic tube (4); at least two sealing spiral rings (21) are arranged on the outer edge of the main body (2).
2. The high-air-tightness nuclear magnetic cap according to claim 1, wherein the main body (2) is provided with a pressure slow-release cavity (22) communicated with the nuclear magnetic tube (4), and the diameter of the pressure slow-release cavity (22) is 0.5-6mm.
3. The high-tightness nuclear magnetic cap according to claim 1, characterized in that the sealing spiral ring (21) is provided integrally with the main body (2).
4. The high-air-tightness nuclear magnetic cap according to claim 1, wherein the main body (2) and the cap body (1) are provided with a pressure slow release cavity (22) communicated with the outside, and the diameter of the pressure slow release cavity (22) is 0.5-6mm.
5. The high-air-tightness nuclear magnetic cap according to claim 1, further comprising a pumping and filling structure (3), wherein the pumping and filling structure (3) comprises a limit groove (33), a hollow pipe (34), a first pumping and filling channel (31) and a second pumping and filling channel (32) which are mutually communicated, the first pumping and filling channel (31) vertically penetrates through the cap body (1) and goes deep into the main body (2), and one end of the second pumping and filling channel (32) is communicated with the first pumping and filling channel (31) and the other end of the second pumping and filling channel is communicated with the nuclear magnetic pipe (4); the outer diameter of the hollow tube (34) is matched with the inner diameter of the first pumping and filling channel (31), the hollow tube (34) is vertically inserted into the first pumping and filling channel (31) and can reciprocate along the first pumping and filling channel (31), the inner diameter of the limiting groove (33) is the same as that of the first pumping and filling channel (31), the limiting groove (33) is located under the first pumping and filling channel (31), and the bottom of the limiting groove (33) is lower than the bottom of the second pumping and filling channel (32).
6. The high-air-tightness nuclear magnetic cap according to claim 1, further comprising a pumping and filling structure (3), wherein the pumping and filling structure (3) comprises a limit clamping groove (35), a sealing rod (36) and a first pumping and filling channel (31) and a second pumping and filling channel (32) which are mutually communicated, the first pumping and filling channel (31) vertically penetrates through the cap body (1) and goes deep into the main body (2), one end of the second pumping and filling channel (32) is communicated with the first pumping and filling channel (31) and the other end of the second pumping and filling channel is communicated with the nuclear magnetic tube (4), the limit clamping groove (35) is arranged on the cap body (1) and is communicated with the first pumping and filling channel (31), the outer diameter of the sealing rod (36) is matched with the inner diameter of the limit clamping groove (35), and the sealing rod (36) is inserted into the limit clamping groove (35) and can reciprocate along the limit clamping groove (35).
7. The high-tightness nuclear magnetic cap according to any of claims 1 to 6, wherein the cap body (1) and the main body (2) are made of fluororubber material.
8. The high-tightness nuclear magnetic cap according to claim 7, wherein the cap body (1) and the main body (2) are made of perfluoroether rubber materials.
9. The high-tightness nuclear magnetic cap according to any of claims 1 to 6, wherein the surface of the main body (2) and the surface of the cap body (1) are both provided with a coating layer (5) made of a high polymer material which can be in direct contact with an organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321206753.9U CN220176932U (en) | 2023-05-18 | 2023-05-18 | High-air-tightness nuclear magnetic cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321206753.9U CN220176932U (en) | 2023-05-18 | 2023-05-18 | High-air-tightness nuclear magnetic cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220176932U true CN220176932U (en) | 2023-12-15 |
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ID=89112434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321206753.9U Active CN220176932U (en) | 2023-05-18 | 2023-05-18 | High-air-tightness nuclear magnetic cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220176932U (en) |
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2023
- 2023-05-18 CN CN202321206753.9U patent/CN220176932U/en active Active
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