Inductively coupled plasma mass spectrometer sampling device

Abstract

The utility model provides a sampling device of an inductively coupled plasma mass spectrometer, and relates to the technical field of sampling devices. Comprising a sample introduction frame and a sample tube, a cover plate is arranged on one side of the sample introduction frame, and an auxiliary sample introduction protection structure is arranged between the inner wall of the sample introduction frame and the sample tube; the inner wall of one side of the sample injection frame is fixedly connected with a sample injection pipe, the outer surface of one side of the sample injection frame is fixedly connected with a mounting plate, the mounting plate is L-shaped, the position of the sample pipe can be changed by arranging a rotating disc, so that the sample pipe can be positioned below the sample injection pipe, and at the moment, under the action of an ejection frame, the sample pipe can be ejected. The sample tubes can be in contact with the bottoms of the sample injection tubes for sampling, the length of the sample injection tubes is fixed and does not need to be reserved at the moment, other sample tubes can be protected under the action of the protective cover when one of the sample tubes injects samples, and the situation that a plurality of sample tubes are sputtered to cause mutual influence and further influence a detection result is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sample introduction devices, in particular to a sample introduction device for an inductively coupled plasma mass spectrometer. Background Art

[0002] An inductively coupled plasma mass spectrometer is a mass spectrometer for determining ultra-trace elements and isotope ratios. When in use, it is necessary to transport the sample solution to the atomizer through a sample introduction device, and then analyze the sample vaporized by the atomizer.

[0003] In actual work, the structure and function of the existing sample introduction device are relatively perfect and can basically meet the sample introduction requirements of the inductively coupled plasma mass spectrometer. However, there are still the following two problems:

[0004] 1. During actual use, multiple samples need to be detected. At this time, the sample introduction tube needs to be inserted into different sample tubes respectively. During the insertion and extraction of the sample introduction tube, due to the different positions of the sample tubes, it is necessary to reserve the length of the sample introduction tube to ensure that it can be inserted into test tubes at different distances. After reserving the length, the overall internal space becomes narrow, and the amount of sample solution buffered in the sample introduction tube will increase, thereby increasing the amount of solution in the sample tube and increasing the cost.

[0005] 2. During the sample introduction process, all the sample tubes of the samples are placed naked. When the sample solution is sampled, once sputtering occurs, the solutions between the sample tubes will be mixed, thereby affecting the test results.

[0006] Therefore, the utility model provides a sample introduction device for an inductively coupled plasma mass spectrometer. Summary of the Utility Model

[0007] The purpose of the utility model is to solve the deficiencies in the prior art and provide a sample introduction device for an inductively coupled plasma mass spectrometer.

[0008] To achieve the above object, the utility model adopts the following technical solutions: An injection device for an inductively coupled plasma mass spectrometer, comprising an injection frame and a sample tube. A cover plate is arranged on one side of the injection frame, and an auxiliary injection protection structure is arranged between the inner wall of the injection frame and the sample tube; A sample injection tube is fixedly connected to the inner wall of one side of the injection frame, and a mounting plate is fixedly connected to the outer surface of one side of the injection frame. The mounting plate is in an "L" shape, and a pump body is mounted on the outer surface of the mounting plate. The inlet of the pump body is communicated with the sample injection tube, and a connecting tube is communicated with the outlet of the pump body; An injection valve is mounted below the pump body on one side of the mounting plate. The injection valve is communicated with the connecting tube, and a sample outlet tube is mounted at the bottom of the injection valve; A splash-proof fixing structure is arranged at the bottom and one side of the mounting plate; The auxiliary injection protection structure includes a first motor and a rotating disk. The first motor is fixedly installed at the bottom of the injection frame. The output end of the first motor is fixedly connected with a rotating rod. The top end of the rotating rod is fixedly connected with a circular clamping frame. A circular clamping block is fixedly connected to the bottom of the rotating disk, and the circular clamping block can be clamped into the inner wall of the circular clamping frame.

[0009] As a preferred implementation, a circular clamping rod is inserted into the inner wall of the circular clamping frame, a circular clamping hole is opened in the inner wall of the circular clamping block, and the circular clamping rod can be clamped into the inner wall of the circular clamping hole. A placement groove is opened in the inner wall of the rotating disk. A U-shaped frame is fixedly connected to the bottom of the injection frame. An electric telescopic rod is fixedly installed at the bottom of the U-shaped frame. The output end of the electric telescopic rod is fixedly connected with a top-out frame. A fixed cylinder is fixedly connected to the top of the inner wall of the injection frame. A sliding rod is slidably connected to the inner wall of the fixed cylinder. A threaded insertion rod is threadedly inserted into one side inner wall of the fixed cylinder. The bottom end of the sliding rod is fixedly connected with a protective cover, and a jack for inserting the sample injection tube is opened in the inner wall of the protective cover.

[0010] The technical effect of adopting the above further solution is that the circular clamping frame and the circular clamping block can be used to install components such as the rotating disk and the rotating rod, so that the rotating disk can drive the sample tube to change its position. At this time, under the action of the top-out frame, the sample tube can be driven to move upward, and then the sample tube can be pushed into the sample injection tube for sampling. Under the action of the fixed cylinder and the sliding rod, the position of the protective cover is adjustable, so that the jack can be used for inserting the sample injection tube and the sample tube, thereby avoiding mutual influence during the sampling process.

[0011] As a preferred implementation, the splash-proof fixing structure includes a rectangular sliding groove opened on one side of the mounting plate. A rectangular sliding block is slidably connected to the inner wall of the rectangular sliding groove. A first spring is slidably connected to the inner wall of the rectangular sliding groove, and the other end of the first spring is fixedly connected with the rectangular sliding block. A splash-proof circular frame is fixedly connected to one side of the outer surface of the rectangular sliding block, and the sample outlet tube can be inserted into the inside of the splash-proof circular frame.

[0012] The technical effect of adopting the above further solution is as follows: Under the action of the anti-sputtering circular frame, the liquid during sample extraction can be prevented from splashing, thereby avoiding the liquid splashing onto the surroundings after sample extraction. Then, under the action of the rectangular slider and the rectangular chute, the anti-sputtering circular frame can be slid upward, thereby exposing the sample tube for cleaning and maintenance.

[0013] As a preferred embodiment, one side of the mounting plate is fixedly connected with a first semi-circular clamping frame. The inner wall of the other side of the mounting plate near the bottom is fixedly connected with a fixed circular rod. One end of the fixed circular rod is slidably connected with a sliding cylinder. One end of the sliding cylinder is fixedly connected with a second semi-circular clamping frame. The outer surface of the fixed circular rod is sleeved with a second spring. The two ends of the second spring are respectively fixedly connected with the sliding cylinder and the mounting plate.

[0014] The technical effect of adopting the above further solution is as follows: Under the action of the first semi-circular clamping frame and the second semi-circular clamping frame, the sample tube during sample extraction can be fixed, thereby enabling the sample liquid to be limited when flowing to the sample tube, avoiding position deviation.

[0015] Compared with the prior art, the advantages and positive effects of the present utility model are that

[0016] By setting the rotating disk, the position of the sample tube can be changed, so that the sample tube can be positioned below the injection tube. At this time, under the action of the ejection frame, the sample tube can be in contact with the bottom of the injection tube, thereby sampling. At this time, the length of the injection tube is fixed, and there is no need to reserve length. And under the action of the protective cover, when one sample tube is being injected, the other sample tubes can be protected, avoiding splashing between multiple sample tubes and causing mutual influence, thereby affecting the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an injection device for an inductively coupled plasma mass spectrometer provided by the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the rotating disk part of an injection device for an inductively coupled plasma mass spectrometer provided by the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the circular clamping block part of an injection device for an inductively coupled plasma mass spectrometer provided by the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the anti-sputtering frame part of an injection device for an inductively coupled plasma mass spectrometer provided by the present utility model.

[0021] Legend Explanation:

[0022] 1. Sampling frame; 2. Cover plate; 3. Sample tube; 4. Mounting plate; 5. Pump body; 6. Sampling tube; 7. Sampling valve;

[0023] 8. Auxiliary sampling protection structure; 81. First motor; 82. Rotating rod; 83. Circular clamping frame; 84. Circular clamping block; 85. Rotating disk; 86. Circular clamping rod; 87. Circular clamping hole; 88. Placing groove; 89. U-shaped frame; 810. Electric telescopic rod; 811. Ejecting frame; 812. Fixed cylinder; 813. Sliding rod; 814. Threaded insertion rod; 815. Protective cover;

[0024] 9. Splash-proof fixing structure; 91. Rectangular sliding groove; 92. Rectangular sliding block; 93. First spring; 94. Anti-sputtering circular frame; 95. First semi-circular clamping frame; 96. Fixed circular rod; 97. Sliding cylinder; 98. Second semi-circular clamping frame; 99. Second spring;

[0025] 10. Sample output tube; 11. Connecting tube. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] As Figures 1-4 shown, this embodiment provides a technical solution: an inductively coupled plasma mass spectrometer sampling device, including a sampling frame 1 and a sample tube 3. A cover plate 2 is provided on one side of the sampling frame 1, and an auxiliary sampling protection structure 8 is provided between the inner wall of the sampling frame 1 and the sample tube 3; a sampling tube 6 is fixedly connected to the inner wall on one side of the sampling frame 1, and a mounting plate 4 is fixedly connected to the outer surface on one side of the sampling frame 1. The mounting plate 4 is in an "L" shape, and a pump body 5 is installed on the outer surface of the mounting plate 4. The sampling port of the pump body 5 is communicated with the sampling tube 6, and the sample output port of the pump body 5 is communicated with a connecting tube 11; a sampling valve 7 is installed below the pump body 5 on one side of the mounting plate 4. The sampling valve 7 is communicated with the connecting tube 11, and a sample output tube 10 is installed at the bottom of the sampling valve 7; a splash-proof fixing structure 9 is provided at the bottom and one side of the mounting plate 4; the auxiliary sampling protection structure 8 includes a first motor 81 and a rotating disk 85. The first motor 81 is fixedly installed on the bottom of the sampling frame 1, the output end of the first motor 81 is fixedly connected to a rotating rod 82, the top end of the rotating rod 82 is fixedly connected to a circular clamping frame 83, and the bottom of the rotating disk 85 is fixedly connected to a circular clamping block 84. The circular clamping block 84 can be clamped into the inner wall of the circular clamping frame 83.

[0028] Furthermore, as Figures 2-3As shown in the figure: A circular clamping rod 86 is inserted into the inner wall of the circular clamping frame 83, a circular clamping hole 87 is formed in the inner wall of the circular clamping block 84, the circular clamping rod 86 can be clamped into the inner wall of the circular clamping hole 87, a placement groove 88 is formed in the inner wall of the rotating disk 85, a U-shaped frame 89 is fixedly connected to the bottom of the sample injection frame 1, an electric telescopic rod 810 is fixedly installed at the bottom of the U-shaped frame 89, the output end of the electric telescopic rod 810 is fixedly connected to a top-out frame 811, a fixed cylinder 812 is fixedly connected to the top inner wall of the sample injection frame 1, a sliding rod 813 is slidably connected to the inner wall of the fixed cylinder 812, a threaded insertion rod 814 is threadedly inserted into one side inner wall of the fixed cylinder 812, the bottom end of the sliding rod 813 is fixedly connected to a protective cover 815, a jack for inserting the sample injection tube 6 is formed in the inner wall of the protective cover 815. The interaction between the circular clamping frame 83 and the circular clamping block 84 can install components such as the rotating disk 85 and the rotating rod 82, so that the rotating disk 85 can drive the sample tube 3 to change its position. At this time, under the action of the top-out frame 811, the sample tube 3 can be driven to move upward, and then the sample tube 3 can be pushed into the sample injection tube 6 for sampling. Under the action of the fixed cylinder 812 and the sliding rod 813, the position of the protective cover 815 is adjustable, so that the jack can be inserted by the sample injection tube 6 and the sample tube 3, and thus during the sampling process, mutual influence can be avoided.

[0029] In the above solution, there is also a problem that the sample outlet tube 10 is prone to splashing during sample outlet, such as Figure 4 As shown in the figure: In this solution, the anti-splash fixing structure 9 includes a rectangular sliding groove 91, the rectangular sliding groove 91 is formed on one side of the mounting plate 4, a rectangular slider 92 is slidably connected to the inner wall of the rectangular sliding groove 91, a first spring 93 is slidably connected to the inner wall of the rectangular sliding groove 91, the other end of the first spring 93 is fixedly connected to the rectangular slider 92, a splash-proof circular frame 94 is fixedly connected to one side of the outer surface of the rectangular slider 92, the sample outlet tube 10 can be inserted into the inside of the splash-proof circular frame 94. Under the action of the splash-proof circular frame 94, the liquid during sample outlet can be prevented from splashing, and thus the liquid is prevented from splashing onto the surrounding area after sample outlet. Then, under the action of the rectangular slider 92 and the rectangular sliding groove 91, the splash-proof circular frame 94 can be slid upward, and then the sample outlet tube 10 can be exposed for cleaning and maintenance.

[0030] In the above solution, there is also a problem that during sample outlet, the sample outlet test tube for receiving the sample outlet liquid is prone to being affected by the impact of the sample outlet liquid and tilting, such as Figure 4As shown in the figure, one side of the mounting plate 4 is fixedly connected with a first semi-circular clamping frame 95. The inner wall of the other side of the mounting plate 4 near the bottom is fixedly connected with a fixed round rod 96. One end of the fixed round rod 96 is slidably connected with a sliding cylinder 97. One end of the sliding cylinder 97 is fixedly connected with a second semi-circular clamping frame 98. A second spring 99 is sleeved on the outer surface of the fixed round rod 96. The two ends of the second spring 99 are respectively fixedly connected with the sliding cylinder 97 and the mounting plate 4. Under the action of the first semi-circular clamping frame 95 and the second semi-circular clamping frame 98, the test tube for sampling can be fixed, so that the sample liquid can be limited when flowing to the test tube for sampling, avoiding the deviation of the position.

[0031] Working principle:

[0032] As Figures 1-4 shown:

[0033] When in use: Place the sample tube 3 in the placement groove 88. At this time, fix the round clamping block 84 at the bottom of the rotating disk 85 with the round clamping frame 83, and snap the round clamping rod 86 into the inner wall of the round clamping hole 87;

[0034] At this time, pull the protective cover 815 downward, so that the sliding rod 813 slides on the inner wall of the fixed cylinder 812 and then slides to an appropriate position. At this time, rotate the threaded insertion rod 814 so that the protective cover 815 protects the top of the rotating disk 85;

[0035] At this time, start the first motor 81 so that the first motor 81 can drive the rotating disk 85 to rotate, so that the sample tube 3 can be located below the insertion hole of the protective cover 815;

[0036] At this time, start the electric telescopic rod 810 so that the ejecting frame 811 can eject the sample tube 3, and then eject it from the insertion hole to the sampling tube 6;

[0037] Start the pump body 5 so that the pump body 5 drives the sample liquid to flow from the sampling tube 6 to the sampling valve 7 and then to the sampling tube 10. At this time, place the test tube for receiving the sample between the first semi-circular clamping frame 95 and the second semi-circular clamping frame 98. Under the action of the second spring 99, the second semi-circular clamping frame 98 and the first semi-circular clamping frame 95 fix the test tube, and then receive the sample liquid.

[0038] The above is only the preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An inductively coupled plasma mass spectrometer sample injection device, comprising a sample injection frame (1) and a sample tube (3), characterized in that: A cover plate (2) is provided on one side of the sample injection frame (1), and an auxiliary sample injection protection structure (8) is provided between the inner wall of the sample injection frame (1) and the sample tube (3); An injection tube (6) is fixedly connected to the inner wall of one side of the injection frame (1), and a mounting plate (4) is fixedly connected to the outer surface of one side of the injection frame (1), wherein the mounting plate (4) is in an "L" shape, and a pump body (5) is mounted on the outer surface of the mounting plate (4), wherein the injection port of the pump body (5) is connected to the injection tube (6), and the outlet of the pump body (5) is connected to a connecting pipe (11); An injection valve (7) is installed on one side of the mounting plate (4) below the pump body (5), the injection valve (7) is connected to a connecting pipe (11), and a sample outlet pipe (10) is installed at the bottom of the injection valve (7); The bottom and one side of the mounting plate (4) are provided with a splash-proof fixing structure (9); The auxiliary sample injection protection structure (8) comprises a first motor (81) and a rotating disk (85); the first motor (81) is fixedly mounted on the bottom of the sample injection frame (1); the output end of the first motor (81) is fixedly connected to a rotating rod (82); the top end of the rotating rod (82) is fixedly connected to a circular clamping frame (83); the bottom of the rotating disk (85) is fixedly connected to a circular clamping block (84); the circular clamping block (84) can be clamped into the inner wall of the circular clamping frame (83).

2. The sample injection device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: A round clamping rod (86) is inserted into the inner wall of the round clamping frame (83), a round clamping hole (87) is opened on the inner wall of the round clamping block (84), and the round clamping rod (86) can be clamped into the inner wall of the round clamping hole (87), and a placement groove (88) is opened on the inner wall of the rotating disk (85).

3. The sample injection device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The bottom of the sample injection frame (1) is fixedly connected to a U-shaped frame (89), the bottom of the U-shaped frame (89) is fixedly installed with an electric telescopic rod (810), and the output end of the electric telescopic rod (810) is fixedly connected to an ejection frame (811).

4. The sample injection device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: A fixed cylinder (812) is fixedly connected to the top of the inner wall of the injection frame (1), a sliding rod (813) is slidably connected to the inner wall of the fixed cylinder (812), and a threaded rod (814) is threadedly inserted into the inner wall of one side of the fixed cylinder (812).

5. The sample injection device for inductively coupled plasma mass spectrometer according to claim 4, characterized in that: The bottom end of the sliding rod (813) is fixedly connected to a protective cover (815), and the inner wall of the protective cover (815) is provided with a plug hole for inserting the sample injection tube (6).

6. The sample injection device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The splash-proof fixed structure (9) comprises a rectangular slide groove (91), wherein the rectangular slide groove (91) is opened on one side of the mounting plate (4), the inner wall of the rectangular slide groove (91) is slidably connected to a rectangular slider (92), the inner wall of the rectangular slide groove (91) is slidably connected to a first spring (93), and the other end of the first spring (93) is fixedly connected to the rectangular slider (92).

7. The sample injection device for inductively coupled plasma mass spectrometer according to claim 6, characterized in that: An anti-sputtering circular frame (94) is fixedly connected to one side of the outer surface of the rectangular sliding block (92), and the sample outlet tube (10) can be inserted into the interior of the anti-sputtering circular frame (94).

8. The sample injection device for inductively coupled plasma mass spectrometer according to claim 1, characterized in that: A first semicircular clamping frame (95) is fixedly connected to one side of the mounting plate (4), a fixed round rod (96) is fixedly connected to the inner wall of the other side of the mounting plate (4) near the bottom, one end of the fixed round rod (96) is slidably connected to a sliding cylinder (97), one end of the sliding cylinder (97) is fixedly connected to a second semicircular clamping frame (98), a second spring (99) is sleeved on the outer surface of the fixed round rod (96), and the two ends of the second spring (99) are respectively fixedly connected to the sliding cylinder (97) and the mounting plate (4).

Images