Residue-free sampling device of microwave digestion tube

Abstract

The embodiment discloses a residue-free sampling device of a microwave digestion tube, the residue-free sampling device comprises a sleeve and an extrusion assembly, the length of the sleeve is greater than the depth of the microwave digestion tube, the outer diameter of the sleeve is smaller than the inner diameter of the microwave digestion tube, an accommodating cavity is defined in the sleeve, one side of the sleeve is provided with a sample inlet communicated with the accommodating cavity, and the other side of the sleeve is provided with a sample outlet communicated with the microwave digestion tube. The bottom end of the sleeve is connected with a discharging pipe communicating with the containing cavity. The extrusion assembly is arranged in the containing cavity and can reciprocate in the first direction so as to extrude the sample entering the containing cavity, so that the sample is pushed out of the discharging pipe under the action of extrusion force. According to the technical scheme of the embodiment, the sample in the accommodating cavity is extruded by the extrusion assembly, so that the sample in the accommodating cavity is extruded and then flows out to the bottom of the microwave digestion tube through the discharge tube, and the sample is quickly put into the microwave digestion tube, so that the sample can be effectively prevented from being adhered to the inner wall of the microwave digestion tube in the placement process, and the sample is prevented from being damaged. The digestion effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of microwave digestion, in particular to a residue-free sampling device of a microwave digestion tube. Background Art

[0002] Microwave digestion usually refers to wet digestion that uses microwaves to heat the digestion solution (various acids, some alkali solutions and salts) and the sample in a closed container to quickly dissolve various samples under high temperature and pressure conditions. At present, the mainstream microwave digestion tube is mainly in the shape of a long and thin tube. When weighing the sample, it is mainly based on gravity to make the sample fall from the tube mouth of the microwave digestion tube to the bottom of the tube. However, due to electrostatic adsorption, the sample is easy to adhere to the inner wall of the digestion tube and cannot be concentrated at the bottom of the digestion tube, thus affecting the digestion effect. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a residue-free sampling device for a microwave digestion tube.

[0004] The embodiment of the present application provides a residue-free sampling device for a microwave digestion tube, comprising:

[0005] A sleeve, the length of which is greater than the depth of the microwave digestion tube, the outer diameter of which is smaller than the inner diameter of the microwave digestion tube, and the interior of the sleeve defines a receiving cavity, one side of the sleeve is provided with an inlet connected to the receiving cavity, and the bottom end of the sleeve is connected to a discharge pipe connected to the receiving cavity;

[0006] The extrusion assembly is arranged in the accommodating cavity and can reciprocate along a first direction to extrude the sample entering the accommodating cavity, so that the sample is pushed out from the discharge pipe under the action of the extrusion force.

[0007] In one embodiment, the extrusion assembly includes a connecting rod, an extrusion piece and a pressing head, wherein a portion of the connecting rod extends into the sleeve along the first direction, an end of the connecting rod extending outside the sleeve is connected to the pressing head, and an end of the connecting rod extending into the sleeve is connected to the pressing head.

[0008] In one embodiment, it further comprises a cover and an elastic member, wherein the cover is detachably connected to the top of the sleeve, and the upper surface and the lower surface of the cover are respectively provided with a first column and a second column, and the first column and the second column are interconnected to form a chamber;

[0009] One end of the connecting rod passes through the chamber and extends into the accommodating chamber, the elastic member is wound around the portion of the connecting rod located in the chamber, and one end of the elastic member facing the discharge pipe abuts against the bottom of the second column, and an extension block extending along a second direction is connected to the portion of the connecting rod located in the chamber; the second direction is perpendicular to the second direction;

[0010] Wherein, when the connecting rod is driven to reciprocate, the extending block alternately squeezes the elastic member to control the squeezing member to reciprocate and squeeze the sample in the containing chamber.

[0011] In one embodiment, an inner wall of the cover is provided with an internal thread, and an outer surface of the top of the sleeve is provided with an external thread matching the internal thread.

[0012] In one embodiment, the extrusion member includes a connecting ring and a plurality of extrusion sheets connected to the connecting ring, the connecting ring is connected to one end of the connecting rod extending into the accommodating cavity, and the plurality of extrusion sheets are distributed in a ring shape on the outer circumference of the connecting ring.

[0013] In one embodiment, a plug hole for plugging with the connecting rod is provided in the middle of the connecting ring.

[0014] In one embodiment, the discharge pipe includes a first tube body and a second tube body that are interconnected, the first tube body is connected to the bottom of the sleeve, and the second tube body is movably sleeved on the outside of the first tube body.

[0015] In one embodiment, the outer surface of the first tube body is provided with guide bars, and the inner surface of the second tube body is provided with guide grooves adapted to the guide bars;

[0016] When the second tube body is rotated, the guide bar moves in the guide groove along the distribution track of the guide groove, so that the second tube body can be extended and retracted relative to the first tube body.

[0017] Compared with the prior art, the above technical solution provided by the embodiment of the present application has the following beneficial effects:

[0018] The sample is placed into the containing cavity from the injection port until a certain amount of the sample is placed in the containing cavity, and then the sleeve is placed into the microwave digestion tube. At this time, the outlet of the discharge pipe is at a certain distance from the bottom of the microwave digestion tube, and then the extrusion component is driven to extrude the sample in the containing cavity, so that the sample in the containing cavity is squeezed and then flows out to the bottom of the microwave digestion tube through the discharge pipe, so that the sample is quickly placed in the microwave digestion tube, which can effectively avoid adhering to the inner wall of the microwave digestion tube during the placement process, thereby improving the digestion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a microwave digestion tube in which a residue-free sampling device is placed in the microwave digestion tube;

[0020] Figure 2 It is a structural schematic diagram of an extrusion member in a residue-free sampling device of a microwave digestion tube of the present application;

[0021] Figure 3 It is a structural schematic diagram of a discharge pipe in a residue-free sampling device of a microwave digestion tube of the present application;

[0022] Figure 4 It is a schematic diagram showing that the second tube body of a discharge tube in a residue-free sampling device of a microwave digestion tube of the present application is in a retracted state.

[0023] Numbers in the figure:

[0024] 10. Sleeve; 10a. Accommodating chamber; 20. Extrusion assembly; 21. Connecting rod; 22. Extrusion piece; 221. Connecting ring; 221a. Plug hole; 222. Extrusion sheet; 23. Pressing head; 30. Discharge pipe; 31. First tube body; 31a. Guide strip; 32. Second tube body; 32a. Guide groove; 40. Elastic piece; 50. Extension block; 60. Cover; 70. First column body; 80. Second column body; 90. Chamber; 100. Inlet; 200. Microwave digestion tube. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] Please refer to Figures 1 to 4 An embodiment of the present application provides a residue-free sampling device for a microwave digestion tube, comprising a sleeve 10 and an extrusion assembly 20.

[0028] Specifically, the length of the sleeve 10 is greater than the depth of the microwave digestion tube, the outer diameter is smaller than the inner diameter of the microwave digestion tube, and the interior of the sleeve 10 defines a accommodating cavity 10a, one side of the sleeve 10 is provided with an inlet 100 connected to the accommodating cavity 10a, and the bottom end of the sleeve 10 is connected to a discharge pipe 30 connected to the accommodating cavity 10a; the extrusion assembly 20 is arranged in the accommodating cavity 10a, and can reciprocate along a first direction to extrude the sample entering the accommodating cavity 10a, so that the sample is pushed out from the discharge pipe 30 under the action of the extrusion force.

[0029] Exemplarily, when sampling a sample (e.g., lipstick pigment), the sleeve 10 needs to be placed inside the microwave digestion tube for use, that is, the sample is loaded into the containing chamber 10a from the injection port 100, and then the sleeve 10 is placed inside the microwave digestion tank, and then the extrusion assembly 20 is driven to reciprocate along the first direction so that the sample in the containing chamber 10a is squeezed, and then flows out to the bottom of the microwave digestion tube through the discharge pipe 30, so that the sample is quickly placed in the microwave digestion tube, which can effectively avoid adhesion to the inner wall of the microwave digestion tube during the placement process. In addition, it should be noted that before the sample is placed in the containing chamber 10a for extrusion, the inner diameter of the discharge pipe 30 is smaller than the diameter of the sample to ensure that the sample will not flow out from the discharge pipe 30 after the sample is placed in the containing chamber 10a and before extrusion.

[0030] It should be noted that the “first direction” mentioned above refers to the length direction of the sleeve 10. Figure 1 The X direction in .

[0031] Illustratively, the extrusion assembly 20 may adopt the specific structure in the following embodiments, or may adopt a component in the prior art that can extrude the sample in the containing cavity 10a, which is not limited thereto.

[0032] The residue-free sampling device for a microwave digestion tube based on the above technical features puts the sample into the containing cavity 10a from the injection port 100 until a certain amount of the sample is put into the containing cavity 10a, and then puts the sleeve 10 into the microwave digestion tube. At this time, the outlet of the discharge pipe 30 is at a certain distance from the bottom of the microwave digestion tube, and then drives the extrusion assembly 20 to extrude the sample in the containing cavity 10a, so that the sample in the containing cavity 10a is squeezed and then flows out to the bottom of the microwave digestion tube through the discharge pipe 30, so that the sample is quickly put into the microwave digestion tube, which can effectively avoid adhering to the inner wall of the microwave digestion tube during the placement process, thereby improving the digestion effect.

[0033] In one embodiment, the extrusion assembly 20 includes a connecting rod 21, an extrusion piece 22 and a pressing head 23, part of the connecting rod 21 extends into the sleeve 10 along the first direction, the end of the connecting rod 21 extending outside the sleeve 10 is connected to the pressing head 23, and the end of the connecting rod 21 extending into the sleeve 10 is connected to the pressing head 23.

[0034] Exemplarily, when it is necessary to extrude the sample in the accommodating chamber 10a, the pressing head 23 is pressed so that the connecting rod 21 is pushed close to the discharge pipe 30. Since the end of the connecting rod 21 close to the discharge pipe 30 is connected to the extrusion piece 22, the extrusion piece 22 gradually contacts the sample and squeezes the sample as the connecting rod 21 is pushed, thereby pushing the sample out of the discharge pipe 30.

[0035] In one embodiment, it also includes a cover 60 and an elastic member 40, the cover 60 is detachably connected to the top of the sleeve 10, and the upper surface and lower surface of the cover 60 are respectively provided with a first column 70 and a second column 80, and the first column 70 and the second column 80 are connected to each other to form a chamber 90. One end of the connecting rod 21 passes through the chamber 90 and extends into the accommodating chamber 10a, the elastic member 40 is wound on the part of the connecting rod 21 located in the chamber 90, and the end of the elastic member 40 facing the discharge pipe 30 is in contact with the bottom of the second column 80, and the part of the connecting rod 21 located in the chamber 90 is connected to an extension block 50 extending along the second direction; the second direction is perpendicular to the second direction. Wherein, when the connecting rod 21 is driven to reciprocate, the extension block 50 alternately squeezes the elastic member 40 to control the extrusion member 22 to reciprocate and squeeze the sample in the accommodating chamber 10a.

[0036] Exemplarily, the elastic member 40 may be a spring, or other components capable of providing resilience in the prior art, which is not limited thereto.

[0037] For example, the cover 60 is installed on the top of the sleeve 10 in a detachable connection manner so that the extrusion assembly 20 can be removed from the accommodating cavity 10a later, which is convenient for cleaning or replacing the extrusion member 22 in the extrusion assembly 20. The specific detachable connection manner may be a snap connection, a threaded connection, or a plug-in connection, etc., which is not limited thereto.

[0038] In this embodiment, a first column 70 and a second column 80 are respectively provided on the upper surface and the lower surface of the cover 60 relative to each other, and the first column 70 and the second column 80 are connected to each other to form a chamber 90, and then one end of the connecting rod 21 is passed through the chamber 90 and extended into the accommodating chamber 10a. Since the elastic member 40 is wound on the part of the connecting rod 21 located in the chamber 90, when the pressing head 23 is pressed, the connecting rod 21 is pushed to move in the direction close to the discharge pipe 30, so that the extension block 50 continuously squeezes the elastic member 40. When the squeezing of the pressing head 23 is released, the elastic member 40 exerts a force on the extension block 50 due to its own resilience, so that the connecting rod 21 can automatically restore to the state before squeezing, without manual resetting, with a simple structure and convenient operation.

[0039] In one embodiment, the inner wall of the cover 60 is provided with an internal thread, and the outer surface of the top of the sleeve 10 is provided with an external thread matching the internal thread. In this way, the cover 60 and the sleeve 10 are detachably connected by threaded connection, which is convenient for quick disassembly and assembly.

[0040] In one embodiment, the extrusion member 22 includes a connecting ring 221 and a plurality of extrusion sheets 222 connected to the connecting ring 221 . The connecting ring 221 is connected to one end of the connecting rod 21 extending into the accommodating cavity 10a . The plurality of extrusion sheets 222 are distributed in a ring shape on the outer circumference of the connecting ring 221 .

[0041] In one embodiment, a plug hole 221a is provided in the middle of the connecting ring 221 for plugging with the connecting rod 21. Thus, by providing the plug hole 221a in the middle of the connecting ring 221, the plug hole 221a on the connecting ring 221 is then used to plug with the end of the connecting rod 21 extending into the accommodating cavity 10a, thereby quickly fixing the connecting ring 221 to the connecting rod 21, with a simple structure and convenient assembly and disassembly.

[0042] In one embodiment, the discharge pipe 30 includes a first tube body 31 and a second tube body 32 which are interconnected. The first tube body 31 is connected to the bottom of the sleeve 10 , and the second tube body 32 is movably sleeved on the outside of the first tube body 31 .

[0043] Exemplarily, since different samples require different specifications and sizes, the discharge pipe 30 in this embodiment is composed of a first tube body 31 and a second tube body 32, and the second tube body 32 can be movably mounted on the outside of the first tube body 31, that is: when the required sample specifications are larger, the second tube body 32 is pulled out from the first tube body 31, and the sample flows through the first tube body 31 and the second tube body 32 in turn, and flows out from the discharge end of the second tube body 32, so that the diameter of the pushed sample is larger; when the required sample specifications are smaller, the second tube body 32 is retracted to the outside of the first tube body 31, and the sample only flows out from the first tube body 31, so that the diameter of the sample can be smaller.

[0044] In one embodiment, the outer surface of the first tube body 31 is provided with guide bars 31a, and the inner surface of the second tube body 32 is provided with guide grooves 32a adapted to the guide bars 31a. When the second tube body 32 is rotated, the guide bars 31a move in the guide grooves 32a along the distribution track of the guide grooves 32a, so that the second tube body 32 is extended and retracted relative to the first tube body 31.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A residue-free sampling device for a microwave digestion tube, characterized in that: include: A sleeve, the length of which is greater than the depth of the microwave digestion tube, the outer diameter of which is smaller than the inner diameter of the microwave digestion tube, and the interior of the sleeve defines a receiving cavity, one side of the sleeve is provided with an inlet connected to the receiving cavity, and the bottom end of the sleeve is connected to a discharge pipe connected to the receiving cavity; The extrusion assembly is arranged in the accommodating cavity and can reciprocate along a first direction to extrude the sample entering the accommodating cavity, so that the sample is pushed out from the discharge pipe under the action of the extrusion force.

2. The residue-free sampling device for a microwave digestion tube according to claim 1, characterized in that: The extrusion assembly includes a connecting rod, an extrusion piece and a pressing head. Part of the connecting rod extends into the sleeve along the first direction, one end of the connecting rod extending outside the sleeve is connected to the pressing head, and one end of the connecting rod extending into the sleeve is connected to the pressing head.

3. The residue-free sampling device for a microwave digestion tube according to claim 2, characterized in that: It also includes a cover and an elastic member, wherein the cover is detachably connected to the top of the sleeve, and the upper surface and the lower surface of the cover are respectively provided with a first column and a second column, and the first column and the second column are connected to each other to form a chamber; One end of the connecting rod passes through the chamber and extends into the accommodating chamber, the elastic member is wound around the portion of the connecting rod located in the chamber, and one end of the elastic member facing the discharge pipe abuts against the bottom of the second column, and an extension block extending along a second direction is connected to the portion of the connecting rod located in the chamber; the second direction is perpendicular to the second direction; Wherein, when the connecting rod is driven to reciprocate, the extending block alternately squeezes the elastic member to control the squeezing member to reciprocate and squeeze the sample in the containing chamber.

4. The residue-free sampling device for a microwave digestion tube according to claim 3, characterized in that: An inner wall of the sleeve cover is provided with an internal thread, and an outer surface of the top of the sleeve is provided with an external thread matched with the internal thread.

5. The residue-free sampling device for a microwave digestion tube according to claim 3, characterized in that: The extrusion piece includes a connecting ring and a plurality of extrusion sheets connected to the connecting ring. The connecting ring is connected to one end of the connecting rod extending into the accommodating cavity. The plurality of extrusion sheets are distributed in an annular shape on the outer circumference of the connecting ring.

6. The residue-free sampling device for a microwave digestion tube according to claim 5, characterized in that: A plugging hole for plugging with the connecting rod is provided in the middle of the connecting ring.

7. The residue-free sampling device for a microwave digestion tube according to claim 1, characterized in that: The discharge pipe comprises a first tube body and a second tube body which are interconnected, wherein the first tube body is connected to the bottom of the sleeve, and the second tube body is movably sleeved on the outside of the first tube body.

8. The residue-free sampling device for a microwave digestion tube according to claim 7, characterized in that: The outer surface of the first tube body is provided with guide bars, and the inner surface of the second tube body is provided with guide grooves adapted to the guide bars; When the second tube body is rotated, the guide bar moves in the guide groove along the distribution track of the guide groove, so that the second tube body can be extended and retracted relative to the first tube body.

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