Feeding auxiliary mechanism of ion chromatograph

Abstract

The utility model discloses an ion chromatograph feeding auxiliary mechanism which comprises a working table, a driving device and a sampling device, the driving device is arranged on one side of the top of the working table, and a sample mixer is arranged at the output tail end of the driving device and used for dissolving and mixing detection samples. The driving device can drive the sample mixer to move along the X, Y and Z directions; a sampling device is rotationally arranged at the top of the workbench and below the sample mixer, and a plurality of sampling pipes are uniformly and vertically arranged on the sampling device in the circumferential direction of the rotating axis of the sampling device; the bottom of the sample mixer penetrates through the bottom wall of the sample mixer and is provided with a quantitative sample conveying assembly in a liftable manner, and the quantitative sample conveying assembly is used for quantitatively conveying sample liquid into the sampling tube, so that the problems of low sampling quantity precision and low manual sampling efficiency during multi-group quantitative sampling are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a feeding auxiliary mechanism for an ion chromatograph. Background Art

[0002] As an efficient and accurate analytical instrument, the ion chromatograph has a wide range of applications in the fields of environmental monitoring, biopharmaceuticals, food processing, chemical industry, etc.

[0003] During the use of the ion chromatograph, it is usually necessary to dissolve the powder and granular samples to be detected, and put the dissolved sample solution into the sampling tube in a certain amount for subsequent detection and analysis. However, the existing devices mostly perform the dissolution treatment of the sample and subsequent feeding manually, and the dissolution speed of the sample and the feeding accuracy cannot be guaranteed. Especially when taking multiple samples, the detection efficiency of the ion chromatograph is greatly affected.

[0004] Therefore, it is necessary to provide a feeding auxiliary mechanism for an ion chromatograph to solve the problems mentioned in the above background art. Content of the Utility Model

[0005] To achieve the above object, the utility model provides the following technical solution: a feeding auxiliary mechanism for an ion chromatograph, including a workbench, a driving device and a sampling device. One side of the top of the workbench is provided with the driving device, and the output end of the driving device is provided with a sample mixer for dissolving and mixing the detection sample. The driving device can drive the sample mixer to move along the X, Y, and Z directions;

[0006] The sampling device is rotatably arranged below the sample mixer on the top of the workbench, and a plurality of sampling tubes are vertically and uniformly arranged around the rotation axis of the sampling device;

[0007] A quantitative sample delivery component is liftably arranged through the bottom wall of the sample mixer at the bottom of the sample mixer for quantitatively delivering the sample solution into the sampling tube.

[0008] As a preferred technical solution of the utility model, the sample mixer includes:

[0009] A control bin, the lower end of the control bin is provided with a mixing bin, and a connecting seat is fixedly arranged on the outer peripheral side of the control bin. The connecting seat is fixedly connected with the output end of the driving device;

[0010] A mixing component is coaxially arranged in the mixing bin, and a stepped hole with a large upper part and a small lower part is formed through the middle of the bottom wall of the mixing bin;

[0011] A feeding pipe is arranged at the upper end of the control bin, and the feeding pipe penetrates through the control bin and is communicated with the mixing bin.

[0012] As a preferred technical solution of the present utility model, the mixing assembly includes:

[0013] A rotating shaft, the rotating shaft is a hollow shaft, the bottom of the rotating shaft is coaxially and rotatably arranged in the mixer in a suspended manner, the upper end of the rotating shaft penetrates through the control chamber and is connected to a rotary drive mechanism, and a plurality of stirring rods are uniformly arranged in a spiral manner on the outer peripheral side of the position of the rotating shaft in the mixing chamber;

[0014] A plurality of air holes are formed in the stirring rod, and the air holes are communicated with the internal hole channel of the rotating shaft;

[0015] A first air supply unit is arranged in the control chamber, and the first air supply unit is communicated with the internal hole channel of the rotating shaft for supplying high-pressure gas to the air holes.

[0016] As a preferred technical solution of the present utility model, the quantitative sample feeding assembly includes:

[0017] A measuring cylinder, the measuring cylinder is slidably and hermetically arranged in the small-diameter section of the stepped hole, a liquid outlet hole is formed at the bottom of the measuring cylinder, a sealing plate is coaxially arranged at the upper end of the measuring cylinder, the sealing plate is slidably and hermetically matched with the large-diameter section of the stepped hole, and a plurality of flow channels are vertically and uniformly formed in the circumferential direction at the upper end of the measuring cylinder, and the flow channels are communicated with the bottom of the inner side wall of the measuring cylinder;

[0018] A plurality of liquid inlet ports are correspondingly communicated with the upper end of the sealing plate and the flow channels;

[0019] A diversion tube is installed at the bottom of the measuring cylinder, and a ring plate is coaxially and fixedly arranged on the outer side of the middle part of the measuring cylinder, and the ring plate is located below the mixing chamber.

[0020] As a preferred technical solution of the present utility model, solenoid valves are arranged in both the flow channels and the liquid outlet hole.

[0021] As a preferred technical solution of the present utility model, a plurality of fine-tuning hydraulic cylinders are arranged between the bottom of the mixing chamber and the ring plate.

[0022] As a preferred technical solution of the present utility model, a limiting plate is slidably arranged on the outer side of the measuring cylinder below the ring plate, the limiting plate and the ring plate are elastically connected by a buffer spring, and a flexible layer is adhered to the lower end of the limiting plate.

[0023] As a preferred technical solution of the present utility model, a sliding plug is slidably and hermetically arranged in the measuring cylinder, an airbag unit is arranged between the sliding plug and the sealing plate, and the airbag unit is connected to a second air supply unit, and the second air supply unit is arranged at the bottom of the mixing chamber.

[0024] Compared with the prior art, the present utility model provides a feeding auxiliary mechanism for an ion chromatograph, which has the following beneficial effects:

[0025] In the utility model, gas is filled into the mixing component while stirring the sample liquid to form bubbles, and the bubbles burst during the rising process to drive the surrounding liquid to flow, thereby enhancing the stirring effect and accelerating the dissolution of the sample powder; and an air bag unit, a second air supply unit, a measuring cylinder and a sliding plug are provided, and the sample liquid is accurately taken by controlling the internal pressure value of the air bag, avoiding the problems of low sampling accuracy and low efficiency of manual sampling when manually taking multiple groups of quantitative samples. Brief Description of the Figures

[0026] Figure 1 It is a schematic diagram of the overall structure of an ion chromatograph feeding auxiliary mechanism;

[0027] Figure 2 It is a schematic diagram of the structure of a sample mixer for feeding auxiliary mechanism of ion chromatograph;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of a sample mixer of an ion chromatograph feeding auxiliary mechanism;

[0029] Figure 4 It is a schematic diagram of the cross-sectional structure of a quantitative sample delivery component of an ion chromatograph feeding auxiliary mechanism;

[0030] In the figure: 1, workbench; 2, driving device; 3, sample mixer; 4, sampling device; 5, sampling tube; 6, quantitative sample delivery component; 31, control chamber; 32, connecting seat; 33, sample mixing chamber; 34, feeding tube; 35, mixing component; 331, stepped hole; 351, rotating shaft; 352, stirring rod; 353, motor; 354, first air supply unit; 61, measuring cylinder; 62, sealing plate; 63, liquid inlet; 64, guide tube; 65, limit plate; 66, sliding plug; 67, airbag unit; 68, second air supply unit; 69, ring plate; 610, fine-tuning hydraulic cylinder; 611, buffer spring. Specific implementation method

[0031] Please refer to Figures 1-4 , the utility model provides an ion chromatograph feeding auxiliary mechanism, comprising: a workbench 1, a driving device 2 and a sampling device 4, the driving device 2 is arranged on one side of the top of the workbench 1, and a sample mixer 3 is arranged at the output end of the driving device 2 for dissolving and mixing the test sample, and the driving device 2 can drive the sample mixer 3 to move along the X, Y and Z directions;

[0032] The top of the workbench 1 is located below the sample mixer 3 and is rotatably provided with a sampling device 4, and the sampling device 4 has a plurality of sampling tubes 5 evenly and vertically arranged along the circumference of its rotation axis;

[0033] A quantitative sample delivery component 6 is liftably arranged through the bottom wall at the bottom of the mixer 3 for quantitatively delivering the sample liquid into the sampling tube 5.

[0034] Specifically, the driving device 2 includes driving modules arranged along the X, Y, and Z directions, and each driving module is composed of a lead screw nut pair structure to realize the movement of the mixer 3 along the X, Y, and Z directions.

[0035] During use, the powder sample and the diluent are added to the mixer 3 according to the ratio, and the sample powder is fully dissolved in the diluent through the mixer 3. Then, the driving device 2 is controlled to move the mixer 3 to a certain distance directly above any sampling tube 5. Then, the quantitative sample delivery component 6 is controlled to quantitatively deliver the sample into the sampling tube 5. After the sample delivery is completed, the sampling device 4 is driven to rotate so that the next sampling tube 5 is located directly below the quantitative sample delivery component 6, and quantitative sample delivery is performed on multiple sampling tubes 5 in sequence, avoiding the problems of low accuracy of the sampling volume and low efficiency of manual sampling during multi-group quantitative sampling.

[0036] In this embodiment, the mixer 3 includes:

[0037] A control bin 31, a mixing bin 33 is installed at the lower end of the control bin 31, a connecting seat 32 is fixedly arranged on the outer peripheral side of the control bin 31, and the connecting seat 32 is fixedly connected to the output end of the driving device 2;

[0038] A mixing component 35 is coaxially arranged in the mixing bin 33, and a stepped hole 331 with a large upper part and a small lower part is penetrated and opened in the middle of the bottom wall of the mixing bin 33;

[0039] A feeding pipe 34 is arranged at the upper end of the control bin 31, and the feeding pipe 34 penetrates through the control bin 31 and is communicated with the mixing bin 33.

[0040] In this embodiment, the mixing component 35 includes:

[0041] A rotating shaft 351, the rotating shaft 351 is a hollow shaft, the bottom of the rotating shaft 351 is coaxially and rotatably arranged in the mixer 3 in a suspended manner, the upper end of the rotating shaft 351 penetrates through the control bin 31 and is connected to a rotation driving mechanism, and a plurality of stirring rods 352 are spirally and evenly arranged on the outer peripheral side of the position of the rotating shaft 351 in the mixing bin 33;

[0042] A plurality of air holes are opened on the stirring rod 352, and the air holes are communicated with the internal hole channel of the rotating shaft 351;

[0043] A first air supply unit 354 is arranged in the control bin 31, and the first air supply unit 354 is communicated with the internal hole channel of the rotating shaft 351 for supplying high-pressure gas to the air holes.

[0044] Specifically, the rotation driving mechanism is a motor 353.

[0045] It should be noted that a rotary seal joint is rotatably arranged inside the control chamber 31 on the outer side of the rotating shaft 351. The air outlet end of the first air supply unit 354 is connected to the rotary seal joint through a hose and is communicated with the inside of the rotating shaft 351, and the air inlet end of the first air supply unit 354 is communicated with the outside through a hose.

[0046] When mixing the samples in the sample mixing chamber 33, high-pressure gas is supplied to the air holes through the first air supply unit 354. While the stirring rod 352 stirs the sample liquid, bubbles are formed by injecting gas. During the process of the bubbles rising and bursting in the sample liquid, the surrounding liquid will be driven to flow, thereby enhancing the stirring effect and accelerating the dissolution of the sample powder.

[0047] In this embodiment, the quantitative sample delivery assembly 6 includes:

[0048] A measuring cylinder 61, which is slidably and sealingly arranged in the small-diameter section of the stepped hole 331. The bottom of the measuring cylinder 61 is provided with a liquid outlet hole. A sealing plate 62 is coaxially arranged at the upper end of the measuring cylinder 61. The sealing plate 62 is slidably and sealingly matched with the large-diameter section of the stepped hole 331. A plurality of flow channels are circumferentially and vertically evenly arranged at the upper end of the measuring cylinder 61, and the flow channels are communicated with the bottom of the inner side wall of the measuring cylinder 61;

[0049] A plurality of liquid inlet ports 63 are correspondingly communicated with the upper end of the sealing plate 62 and the flow channels;

[0050] A diversion tube 64 is installed at the bottom of the measuring cylinder 61. A ring plate 69 is coaxially and fixedly arranged on the outer side of the middle part of the measuring cylinder 61, and the ring plate 69 is located below the sample mixing chamber 33.

[0051] In this embodiment, electromagnetic valves are arranged in both the flow channels and the liquid outlet holes.

[0052] In this embodiment, a plurality of fine-tuning hydraulic cylinders 610 are arranged between the bottom of the sample mixing chamber 33 and the ring plate 69.

[0053] Specifically, when the driving device 2 controls the quantitative sample delivery assembly 6 to move directly above the sampling tube 5, the measuring cylinder 61 and the diversion tube 64 are controlled to move downward slightly again through the fine-tuning hydraulic cylinder 610, so as to avoid splashing of the sample liquid when the sample is delivered due to the relatively long distance between the diversion tube 64 and the sampling tube 5.

[0054] As a preferred embodiment, when the fine-tuning hydraulic cylinder 610 is in the extreme contraction position, the upper end of the sealing plate 62 is flush with the upper end surface of the stepped hole 331.

[0055] In this embodiment, a limiting plate 65 is slidably arranged on the circumferential side of the measuring cylinder 61 below the ring plate 69. The limiting plate 65 is elastically connected to the ring plate 69 through a buffer spring 611, and a flexible layer is adhered to the lower end of the limiting plate 65. Specifically, the flexible layer is made of sponge material.

[0056] It should be explained that a pressure sensor is arranged at the lower end of the ring plate 69. When the fine-tuning hydraulic cylinder 610 controls the measuring cylinder 61 and the diversion pipe 64 to move downward slightly, buffering is carried out through the flexible layer and the buffer spring 611 to avoid damaging the sampling pipe 5. When the pressure sensor is pressed to the set pressure threshold, the control unit controls the fine-tuning hydraulic cylinder 610 to stop telescoping, and the quantitative sample delivery assembly 6 performs sample delivery. At the same time, the limiting plate 65 covers the upper end of the sampling pipe 5 to avoid splashing of the sample liquid.

[0057] In this embodiment, a sliding plug 66 is slidably and sealingly arranged in the measuring cylinder 61. An airbag unit 67 is arranged between the sliding plug 66 and the sealing plate 62. The airbag unit 67 is connected to a second air supply unit 68, and the second air supply unit 68 is arranged at the bottom of the mixing chamber 33.

[0058] It should be explained that the airbag unit 67 at least includes an airbag, an inflation valve, a deflation valve, and a pressure detection module. The air pressure value in the airbag matches the amount of sample liquid in the measuring cylinder 61. In the initial state, the airbag unit 67 is in the inflation limit state. At this time, the sliding plug 66 is located at the bottom of the measuring cylinder 61, and there is no sample liquid in the measuring cylinder 61. When quantitative sample delivery is required, first open the solenoid valve at the flow channel, deflate the airbag through the deflation valve to the pressure value corresponding to the sampling amount. During this process, as the airbag deflates, the sliding plug 66 moves upward, and a negative pressure is generated in the measuring cylinder 61 to suck the sample liquid from the liquid inlet 63 into the measuring cylinder 61 through the flow channel. Then close the solenoid valve at the flow channel, open the solenoid valve at the liquid outlet hole, and inflate the airbag through the second air supply unit 68 to completely discharge the sample liquid in the measuring cylinder 61 into the sampling pipe 5, completing one sampling. When multiple groups of sampling are required, replace the sampling pipe 5 and repeat the above actions.

[0059] Specifically, the first air supply unit 354 and the second air supply unit 68 are air pumps.

[0060] During specific implementation, add powder samples and diluents to the mixer according to the ratio. Through the mixer, the sample powder is fully dissolved in the diluent. Then control the driving device to move the mixer directly above any sampling pipe, and then control the quantitative sample delivery assembly to perform quantitative sample delivery into the sampling pipe. After the sample delivery is completed, the sampling device rotates to make the next sampling pipe located directly below the quantitative sample delivery assembly, and perform quantitative sample delivery to multiple sampling pipes in sequence, avoiding the problems of low accuracy of the sampling amount and low efficiency of manual sampling during multiple groups of quantitative sampling by humans.

[0061] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. An ion chromatograph feeding auxiliary mechanism, comprising: A workbench (1), a driving device (2) and a sampling device (4), characterized in that: the driving device (2) is arranged on one side of the top of the workbench (1), a sample mixer (3) is arranged at the output end of the driving device (2) for dissolving and mixing the test sample, and the driving device (2) can drive the sample mixer (3) to move along the X, Y and Z directions; A sampling device (4) is rotatably arranged on the top of the workbench (1) and below the sample mixer (3), and a plurality of sampling tubes (5) are evenly and vertically arranged on the sampling device (4) along the circumference of the rotation axis; The bottom of the sample mixer (3) is provided with a quantitative sample delivery component (6) which penetrates through the bottom wall and can be raised and lowered, and is used for quantitatively delivering the sample liquid into the sampling tube (5).

2. The ion chromatograph feeding auxiliary mechanism according to claim 1, characterized in that: The sample mixer (3) comprises: A control chamber (31), a sample mixing chamber (33) being installed at the lower end of the control chamber (31), a connecting seat (32) being fixedly provided on the outer peripheral side of the control chamber (31), and the connecting seat (32) being fixedly connected to the output end of the driving device (2); A mixing assembly (35) is coaxially arranged in the sample mixing chamber (33), and a stepped hole (331) with a larger top and a smaller bottom is provided through the middle of the bottom wall of the sample mixing chamber (33); A feeding pipe (34) is provided at the upper end of the control chamber (31), and the feeding pipe (34) passes through the control chamber (31) and is connected to the sample mixing chamber (33).

3. The ion chromatograph feeding auxiliary mechanism according to claim 2, characterized in that: The mixing assembly (35) comprises: A rotating shaft (351), the rotating shaft (351) is a hollow shaft, the bottom of the rotating shaft (351) is suspended in the air and coaxially rotates in the sample mixer (3), the upper end of the rotating shaft (351) passes through the control chamber (31) and is connected to the rotating drive mechanism, and a plurality of stirring rods (352) are evenly arranged in a spiral on the outer peripheral side of the rotating shaft (351) located in the sample mixing chamber (33); The stirring rod (352) is provided with a plurality of air holes, and the air holes are connected to the internal channel of the rotating shaft (351); A first air supply unit (354) is provided in the control chamber (31), and the first air supply unit (354) is communicated with an internal channel of the rotating shaft (351) and is used to supply high-pressure gas to the air hole.

4. The ion chromatograph feeding auxiliary mechanism according to claim 3, characterized in that: The quantitative sample delivery component (6) comprises: A measuring cylinder (61), wherein the measuring cylinder (61) is slidingly and sealingly arranged at the small diameter section of the stepped hole (331), a liquid outlet hole is provided at the bottom of the measuring cylinder (61), a sealing plate (62) is coaxially arranged at the upper end of the measuring cylinder (61), the sealing plate (62) is slidingly and sealingly matched with the large diameter section of the stepped hole (331), and a plurality of flow channels are evenly and vertically opened at the upper end of the measuring cylinder (61), and the flow channels are connected to the bottom of the inner wall of the measuring cylinder (61); The upper end of the sealing plate (62) is provided with a plurality of liquid inlets (63) corresponding to and communicating with the flow channel; A flow guide tube (64) is installed at the bottom of the measuring cylinder (61), and a ring plate (69) is coaxially fixed on the outer side of the middle part of the measuring cylinder (61), and the ring plate (69) is located below the sample mixing chamber (33).

5. The ion chromatograph feeding auxiliary mechanism according to claim 4, characterized in that: Solenoid valves are arranged in the flow channel and the liquid outlet.

6. The ion chromatograph feeding auxiliary mechanism according to claim 4, characterized in that: A plurality of fine-tuning hydraulic cylinders (610) are arranged between the bottom of the sample mixing bin (33) and the ring plate (69).

7. The ion chromatograph feeding auxiliary mechanism according to claim 4, characterized in that: A limit plate (65) is slidably arranged on the circumferential side of the measuring cylinder (61) below the ring plate (69); the limit plate (65) is elastically connected to the ring plate (69) via a buffer spring (611); and a flexible layer is bonded to the lower end of the limit plate (65).

8. The ion chromatograph feeding auxiliary mechanism according to claim 6, characterized in that: A sliding plug (66) is provided in the measuring cylinder (61) for sliding sealing, an air bag unit (67) is provided between the sliding plug (66) and the sealing plate (62), the air bag unit (67) is connected to a second air supply unit (68), and the second air supply unit (68) is provided at the bottom of the sample mixing chamber (33).

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