Ion chromatograph with easy sample introduction

Abstract

The application relates to an ion chromatograph facilitating sample feeding, and belongs to the technical field of ion chromatographs. The ion chromatograph comprises a machine body, a side wall of one side of the machine body is provided with a sample feeding port, a mounting seat is fixedly arranged on one side of the sample feeding port, a plurality of mounting grooves are formed in the upper surface of the mounting seat, a sample feeding cylinder is arranged in the mounting groove in a vertical direction, a moving seat is sleeved at the top end of the sample feeding cylinder, the sample feeding cylinder and the moving seat are threadedly connected, a first spring is fixedly arranged between the moving seat and the mounting seat, a material passing cover is fixedly connected to the bottom end of the sample feeding cylinder, the material passing cover is funnel-shaped, the material passing cover is connected with the mounting groove and the sample feeding cylinder, a closing plate is arranged in the material passing cover, an elastic assembly for resetting the closing plate is arranged between the closing plate and a material guiding block, a trigger assembly for moving the closing plate is arranged in the mounting groove, a sample feeding pipe is fixedly connected to the end of the mounting seat away from the moving seat, one end of the sample feeding pipe away from the mounting seat extends into the sample feeding port, and the application has the effect of improving detection efficiency.

Description

Technical Field

[0001] This application relates to the technical field of ion chromatographs, and in particular to an ion chromatograph that facilitates sample injection. Background Technology

[0002] Ion chromatography is a type of high-performance liquid chromatography, hence it is also called high-performance ion chromatography (HPIC) or modern ion chromatography. It differs from traditional ion exchange column chromatography mainly in that the resin has a high degree of cross-linking and a low exchange capacity. The injection volume is very small, and the eluent is delivered by a plunger pump. The eluent is usually subjected to online automatic continuous conductivity detection.

[0003] The working process of an ion chromatograph is as follows: the pump delivers the mobile phase to the analytical system at a stable flow rate (or pressure). The sample is introduced into the column through the injector. The mobile phase carries the sample into the column. In the column, the components are separated and flow sequentially to the detector with the mobile phase. In a suppressed ion chromatograph, a suppression system is added before the conductivity detector. That is, another high-pressure pump delivers the regenerator to the suppressor. In the suppressor, the background conductivity of the mobile phase is reduced. Then the effluent is introduced into the conductivity detection cell. The detected signal is sent to the data system for recording, processing or storage. Non-suppressed ion chromatographs do not use a suppressor or a high-pressure pump for delivering the regenerator.

[0004] Regarding the aforementioned technologies, the inventors believe that when multiple samples need to be tested, the liquid to be tested can only be injected into the ion chromatograph using the same injection tube, requiring constant replacement of the injection needle, which takes a relatively long time and results in very low detection efficiency. Summary of the Invention

[0005] To improve the detection efficiency of ion chromatographs, this application provides an ion chromatograph that facilitates sample injection.

[0006] The ion chromatograph provided in this application, which facilitates sample injection, adopts the following technical solution:

[0007] An ion chromatograph for easy sample injection includes a body with an injection port on one side wall. A mounting base is fixed to one side of the injection port. Multiple mounting grooves are formed through the upper surface of the mounting base. An injection tube is vertically arranged in the mounting groove. A movable seat is fitted onto the top of the injection tube. The injection tube and the movable seat are threaded together. A first spring is fixed between the movable seat and the mounting base. A material hood is fixedly connected to the bottom of the injection tube. The material hood is funnel-shaped and connects the mounting groove and the injection tube. A closing plate is provided inside the material hood. An elastic component for resetting the closing plate is provided between the closing plate and the guide block. A trigger component for moving the closing plate is provided in the mounting groove. An injection tube is fixedly connected to the end of the mounting groove away from the movable seat. The end of the injection tube away from the mounting base extends into the injection port.

[0008] By adopting the above technical solution, the operator presses the sample inlet cylinder, triggering the closing plate to move. This creates a gap between the closing plate and the material passage hood, allowing the material to be tested inside the sample inlet cylinder to flow into the sample inlet tube through this gap. The material then enters the machine body along the inlet tube. This structure allows different sample inlet cylinders to be pressed according to the testing sequence, enabling multiple materials to be tested to enter the machine body sequentially. This eliminates the need for frequent needle changes, reducing testing time and improving efficiency.

[0009] Optionally, the elastic component includes a fixed plate and a second spring. The fixed plate is disposed above the closed plate and is fixedly connected to the mounting base. A guide block is fixedly disposed on the side wall of the closed plate facing the fixed plate. A sliding rod is disposed vertically between the guide block and the fixed plate. The bottom end of the sliding rod is fixedly connected to the end of the guide block away from the closed plate. The top end of the sliding rod passes through the fixed plate and extends to the outside. The sliding rod and the fixed plate are slidably connected vertically. The second spring is fixedly disposed between the guide block and the fixed plate.

[0010] By adopting the above technical solution, when the closing plate is squeezed, it approaches the fixed plate. At this time, the second spring is in a compressed state. After the squeezing of the closing plate disappears, the second spring releases its elastic force to reset the closing plate, thereby achieving the effect of automatic reset of the closing plate.

[0011] Optionally, the triggering component includes a probe and a support plate. The support plate is disposed below the injection cylinder and is fixedly connected to the mounting base. The probe is fixed vertically on the side wall of the support plate facing the injection cylinder, and the diameter of the probe is smaller than the inner diameter of the material hood.

[0012] By adopting the above technical solution, the staff presses the sample inlet cylinder to bring it close to the support plate, thereby squeezing the closing plate with the probe to create a gap between the closing plate and the material passage cover, achieving the effect of the material to be tested in the sample inlet cylinder flowing out from the material passage cover.

[0013] Optionally, a turntable is provided above the mounting base, and the turntable is rotatably connected to the mounting base. A through hole is provided through the side wall of the turntable facing the mounting base, and a lead screw is slidably connected in the through hole. A sleeve is provided at the end of the lead screw near the sample inlet cylinder. A threaded sleeve is threadedly connected to the circumferential side wall of the lead screw, and the threaded sleeve is rotatably connected to the turntable. A driven bevel gear is fixedly provided on the circumferential side wall of the threaded sleeve. A drive motor is installed on the side wall of the turntable facing the threaded sleeve, and a driving bevel gear is fixedly provided on the output shaft of the drive motor. The driving bevel gear meshes with the driven bevel gear.

[0014] By adopting the above technical solution, the drive motor starts and rotates the threaded sleeve through the active and driven bevel gears. The threaded sleeve causes the lead screw to move. When the lead screw moves towards the mounting base, it is forced into the sample cylinder through the sleeve. Through this structure, mechanical operation is replaced by mechanical operation, thus reducing the labor intensity of workers.

[0015] Optionally, a pusher plate is provided inside the sample feeding cylinder, and a feed inlet is provided through the upper surface of the pusher plate. A plug is provided inside the feed inlet, and a cover plate is fixed at the end of the plug away from the material hood. The diameter of the cover plate is larger than the diameter of the feed inlet.

[0016] By adopting the above technical solution, the feed inlet is sealed with a cover plate and a plug, making it difficult for dust to enter the sample cylinder, thereby preventing the material to be tested from being contaminated and improving the accuracy of the test results.

[0017] Optionally, the push plate is slidably connected to the sample inlet cylinder in the vertical direction, the sleeve is sleeved on the end of the lead screw near the mounting base, and the sleeve and the lead screw are slidably connected in the vertical direction. The side wall of the lead screw is provided with a first receiving groove, and a first locking block is slidably connected in the first receiving groove. The side walls on both sides of the first locking block are provided with a first inclined surface. A third spring is fixed between the first locking block and the lead screw. The inner wall of the sleeve is provided with a first locking groove that is adapted to engage with the first locking block.

[0018] By adopting the above technical solution, as the lead screw approaches the mounting base, the lead screw, through the sleeve, brings the sample inlet cylinder closer to the support plate, thereby making the material passage cover and the support plate press tightly together. At this time, the first clamping block is squeezed by the sleeve and retracts into the first receiving groove. Then the lead screw continues to move towards the support plate. During the movement, the lead screw moves the plug and push plate through the cover plate, thereby squeezing the material to be tested into the sample inlet cylinder and reducing the amount of material to be tested remaining in the sample inlet cylinder.

[0019] Optionally, sliders are fixed on both sides of the push plate, and a groove adapted to slide the slider is opened on the inner wall of the injection cylinder. A fourth spring is fixed between the slider and the injection cylinder. A guide rod is provided in the groove. The end of the guide rod is fixedly connected to the injection cylinder, and the guide rod passes through the slider. The guide rod and the slider are slidably connected along the length of the guide rod.

[0020] By adopting the above technical solution, when the push plate is squeezed, the push plate causes the slider to move along the guide rod towards the support plate, at which time the fourth spring is in a compressed state; when the squeezing of the push plate disappears, the fourth spring releases its elastic force and resets the push plate through the slider, thus achieving the effect of automatic reset of the push plate.

[0021] Optionally, the machine body has a second storage groove on the side wall facing the turntable, and a second locking block is slidably connected in the second storage groove. The side walls on both sides of the second locking block have a second inclined surface. A fifth spring is fixed between the second locking block and the machine body. The side walls around the turntable have multiple second slots that are adapted to engage with the second locking block. The number of second slots is the same as the number of sample injection cylinders and they are aligned one by one.

[0022] By adopting the above technical solution, when the operator rotates the turntable to engage the second card block with any second card slot, the sleeve is aligned with the corresponding sample inlet, thus achieving the effect of accurate positioning for the operator.

[0023] Optionally, the turntable has a limiting block fixed on the inner wall of the through hole, and the lead screw has a limiting groove along its own length that is adapted to slide with the limiting block.

[0024] By adopting the above technical solution, the limiting block makes it difficult for the lead screw to rotate with the threaded sleeve, thereby achieving the effect of limiting the lead screw.

[0025] Optionally, a fixed rod is fixedly provided on the side wall of the mounting base facing the turntable, and a sliding cavity is opened on the side wall of the fixed rod facing the turntable. A movable rod is slidably connected in the sliding cavity. The end of the movable rod away from the fixed rod is rotatably connected to the turntable. A third storage groove is opened on the side wall of the movable rod, and a third locking block is slidably connected in the third storage groove. A sixth spring is fixed between the third locking block and the movable rod. A third locking groove is opened through the side wall of the fixed rod to fit two third locking blocks. The two third locking blocks are respectively opened at both ends of the fixed rod, and the third locking groove communicates with the sliding cavity.

[0026] By adopting the above technical solution, the staff can press the third card into the third storage slot, which can move the moving rod, thereby moving the turntable away from the mounting base and increasing the gap between the turntable and the mounting base. This makes it convenient for the staff to put the sample tube into the mounting slot or take the sample tube out of the mounting slot.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Staff members press the sample inlet cylinder in sequence, allowing the material to be tested to enter the machine body sequentially. This eliminates the need for staff to frequently change the injection needle, thus improving testing efficiency.

[0029] 2. The drive motor starts, causing the threaded sleeve to rotate via the active and driven bevel gears. The threaded sleeve causes the lead screw to press against the sample inlet cylinder through the sleeve. When the sample inlet cylinder is pressed against the support plate, the first locking block disengages from the first locking groove, allowing the lead screw to enter the sample inlet cylinder and push the cover plate. This, in turn, uses air pressure to completely expel the material from the sample inlet cylinder. This structure reduces the labor intensity of workers and minimizes the amount of residual material in the sample inlet cylinder.

[0030] 3. When the operator rotates the turntable to engage the second locking block with any second locking slot, the sleeve is aligned with the corresponding injection slot, thus enabling the operator to position the device accurately. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an ion chromatograph that facilitates sample injection, according to an embodiment of this application;

[0032] Figure 2 This is a partial cross-sectional view of an ion chromatograph for easy sample injection according to an embodiment of this application;

[0033] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0034] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0035] Figure 5 yes Figure 2 A magnified view of part C in the middle;

[0036] Figure 6 yes Figure 2 A magnified view of part D in the middle;

[0037] Figure 7 This is a partial schematic diagram illustrating the position of the second inclined surface in an embodiment of this application.

[0038] In the diagram, 1. Body; 11. Sample inlet; 111. Connecting block; 12. Second receiving slot; 121. Second locking block; 1211. Second inclined surface; 122. Fifth spring; 2. Mounting base; 21. Mounting slot; 22. First spring; 23. Sample inlet tube; 24. Fixing rod; 241. Sliding cavity; 242. Third locking slot; 3. Sample inlet tube; 31. Moving base; 32. Material conveying cover; 33. Push plate; 331. Feed inlet; 332. Plug; 3321. Cover plate; 333. Sliding block; 34. Sliding groove; 341. Fourth spring; 342. Guide rod; 4. Closing plate; 41. Guide block; 411. Sliding groove 5. Rod; 6. Elastic component; 7. Fixing plate; 8. Second spring; 9. Triggering component; 10. Probe; 11. Support plate; 12. Turntable; 13. Through hole; 14. Drive motor; 15. Driven bevel gear; 16. Second slot; 17. Limiting block; 18. Knob; 19. Lead screw; 10. Sleeve; 11. First slot; 12. Threaded sleeve; 13. Driven bevel gear; 14. First storage slot; 15. First locking block; 16. First inclined surface; 17. Third spring; 18. Limiting slot; 19. Moving rod; 10. Third storage slot; 11. Third locking block; 12. Sixth spring. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0040] This application discloses an ion chromatograph that facilitates sample introduction.

[0041] refer to Figure 1 and Figure 2 An ion chromatograph for easy sample injection includes a body 1, a mounting base 2 on one side of the body 1, a plurality of injection tubes 3 inside the mounting base 2, the injection tubes 3 being slidably connected to the mounting base 2, an injection tube 23 being connected between the mounting base 2 and the body 1, an injection port 11 being provided through the side wall of the body 1, a connecting block 111 being provided inside the injection port 11, the connecting block 111 being interference-fitted with the body 1, the end of the injection tube 23 away from the mounting base 2 passing through the connecting block 111, and the injection tube 23 being fixedly connected to the connecting block 111.

[0042] The staff places the material to be tested into multiple sample inlet cylinders 3 sequentially, and then installs the sample inlet cylinders 3 into the mounting base 2. During the testing process, the staff presses the sample inlet cylinder 3 to allow the material to be tested to flow into the sample inlet tube 23, and then the material to be tested enters the machine body 1 through the sample inlet tube 23 for testing and analysis. When it is necessary to clean the sample inlet tube 23, the staff pulls the connecting block 111 out of the sample inlet 11; after cleaning, the staff inserts the connecting block 111 back into the sample inlet 11.

[0043] refer to Figure 2 and Figure 3 A turntable 7 is provided above the mounting base 2. A fixed rod 24 is provided vertically between the mounting base 2 and the turntable 7. The bottom of the fixed rod 24 is fixedly connected to the mounting base 2. A sliding cavity 241 is provided on the side wall of the fixed rod 24 away from the mounting base 2. A movable rod 9 is slidably connected in the sliding cavity 241. The end of the movable rod 9 away from the fixed rod 24 is rotatably connected to the turntable 7. A knob 75 is fixedly provided on the side wall of the turntable 7 away from the movable rod 9.

[0044] refer to Figure 2 and Figure 3 The side wall of the moving rod 9 is provided with a third storage groove 91. A third locking block 911 is slidably connected in the third storage groove 91. A sixth spring 912 is provided in the third storage groove 91. The two ends of the sixth spring 912 are fixedly connected to the third locking block 911 and the moving rod 9, respectively. The inner wall of the fixed rod 24 at the sliding cavity 241 is provided with a third locking groove 242 that is adapted to engage with the third locking block 911. There are two third locking grooves 242. The two third locking blocks 911 are respectively opened at the top and bottom of the fixed rod 24.

[0045] Before installing the sample inlet cylinder 3, the operator presses the third locking block 911, causing it to disengage from the third locking groove 242 at the bottom and retract into the third storage groove 91. Then, the operator pulls the knob 75, which drives the moving rod 9 to slide upward along the sliding cavity 241 via the turntable 7, until the third locking block 911 aligns with the third locking groove 242 at the top. At this point, the sixth spring 912 releases its elasticity, pushing the third locking block 911 into the third locking groove 242 at the top. After the sample inlet cylinder 3 is installed, the operator presses the third locking block 911 again, causing it to disengage from the third locking groove 242 at the top and retract into the third storage groove 91. Then, the operator pushes the knob 75, which drives the moving rod 9 to slide downward along the sliding cavity 241 via the turntable 7, until the third locking block 911 aligns with the third locking groove 242 at the bottom. At this point, the sixth spring 912 releases its elasticity, pushing the third locking block 911 into the third locking groove 242 at the bottom.

[0046] refer to Figure 2 The mounting base 2 has multiple mounting slots 21 extending through the upper surface of the turntable 7. In this embodiment, four mounting slots 21 are provided. The four mounting slots 21 are evenly spaced around the central axis of the mounting base 2. A sample inlet cylinder 3 is provided in the vertical direction inside the mounting slot 21. The top end of the sample inlet cylinder 3 extends through the mounting slot 21 and out to the outside.

[0047] refer to Figure 2 and Figure 4 A movable seat 31 is provided between the turntable 7 and the mounting base 2. The number of movable seats 31 is the same as the number of sample injection tubes 3 and they correspond one-to-one. The movable seat 31 is in the shape of a ring. The movable seat 31 is sleeved on the end of the sample injection tube 3 that extends out of the mounting groove 21, and the movable seat 31 is threadedly connected to the sample injection tube 3. A first spring 22 is fixed between the movable seat 31 and the mounting base 2, and the first spring 22 is sleeved on the circumferential side wall of the sample injection tube 23.

[0048] After the staff moves the turntable 7 away from the mounting base 2, they place the material to be tested into each sample inlet 3 in sequence, then place the sample inlet 3 into each movable base 31 in sequence, and then rotate the sample inlet 3 to extend the sample inlet 3 into the mounting groove 21.

[0049] refer to Figure 2 and Figure 5 The turntable 7 has a through hole 71 through the side wall facing the mounting base 2. A lead screw 8 is slidably connected in the through hole 71. A limiting block 74 is fixed in the inner wall of the turntable 7 at the through hole 71. The lead screw 8 has a limiting groove 84 along its own length direction that is adapted to slide with the limiting block 74.

[0050] refer to Figure 2 and Figure 5A threaded sleeve 82 is provided between the turntable 7 and the mounting base 2. The threaded sleeve 82 is sleeved on the circumferential side wall of the lead screw 8 and the two are threadedly connected. The threaded sleeve 82 is rotatably connected to the turntable 7 facing the side wall of the mounting base 2. A driven bevel gear 821 is fixedly provided on the circumferential side wall of the threaded sleeve 82. A drive motor 72 is installed on the side wall of the turntable 7 facing the threaded sleeve 82. A drive bevel gear 721 is fixedly provided on the output shaft of the drive motor 72. The drive bevel gear 721 meshes with the driven bevel gear 821.

[0051] When sample injection is required, the operator starts the drive motor 72, which drives the active bevel gear 721 to rotate. The active bevel gear 721 drives the driven bevel gear 821 to rotate, and the driven bevel gear 821 drives the threaded sleeve 82 to rotate. The threaded sleeve 82 drives the lead screw 8 to move closer to the mounting base 2. After the sample injection is completed, the drive motor 72 reverses and drives the threaded sleeve 82 to reverse through the active bevel gear 721 and the driven bevel gear 821, so that the lead screw 8 moves away from the mounting base 2.

[0052] refer to Figure 4 A push plate 33 is provided inside the sample injection cylinder 3. Slider blocks 333 are fixed on both sides of the push plate 33. A groove 34 is opened in the vertical direction on the inner wall of the sample injection cylinder 3 to slide and adapt to the slider 333. The groove 34 penetrates the top wall of the sample injection cylinder 3. A guide rod 342 is provided inside the groove 34. The bottom end of the guide rod 342 is fixedly connected to the sample injection cylinder 3 on the inner bottom wall of the groove 34. The guide rod 342 passes through the slider 333, and the guide rod 342 and the slider 333 are slidably connected along the length direction of the guide rod 342. A fourth spring 341 is provided inside the groove 34. The two ends of the fourth spring 341 are fixedly connected to the slider 333 and the sample injection cylinder 3 respectively, and the fourth spring 341 is sleeved on the circumferential side wall of the guide rod 342.

[0053] refer to Figure 4 The upper surface of the push plate 33 is provided with a feed inlet 331, and a plug 332 is covered inside the feed inlet 331. A cover plate 3321 is fixed on the top wall of the plug 332, and the diameter of the cover plate 3321 is larger than the diameter of the feed inlet 331.

[0054] refer to Figure 5 A sleeve 81 is provided at one end of the lead screw 8 near the sample inlet cylinder 3. The sleeve 81 and the lead screw 8 are slidably connected in the vertical direction. A first storage groove 83 is provided on the side wall of the lead screw 8. A first locking block 831 is slidably connected in the first storage groove 83. A first inclined surface 8311 is provided on both sides of the first locking block 831. A third spring 832 is provided in the first storage groove 83. The two ends of the third spring 832 are fixedly connected to the first locking block 831 and the lead screw 8, respectively. A first locking groove 811 is provided on the inner wall of the sleeve 81 to engage and fit with the first locking block 831.

[0055] When the lead screw 8 moves closer to the mounting base 2, it drives the sleeve 81 to press the sample inlet cylinder 3, causing it to descend until it stops descending. At this point, the lead screw 8 continues to approach the mounting base 2, and the first inclined surface 8311 of the first locking block 831 is pressed by the sleeve 81, causing the first locking block 831 to disengage from the first locking groove 811 and retract into the first receiving groove 83. Then, the lead screw 8 slides along the sleeve 81 and extends out of the sample inlet cylinder 3. Next, the lead screw 8 presses the cover plate 3321, which, under pressure, moves the push plate 33. The push plate 33 then moves the slider 333 along the guide rod 342, thereby using air pressure to push the material to be tested out of the sample inlet cylinder 3. When the lead screw 8 moves away from the mounting base 2, the fourth spring 341 releases its elastic force, causing the slider 333 to reset. The slider 333 then moves the push plate 33 to reset, which in turn moves the cover plate 3321 to reset.

[0056] refer to Figure 2 and Figure 6 The bottom end of the injection cylinder 3 is fixedly connected to a material hood 32, which is funnel-shaped and connects the mounting groove 21 and the inside of the injection cylinder 3. A closing plate 4 is provided inside the material hood 32. The side wall of the closing plate 4 is attached to the inner wall of the material hood 32. A guide block 41 is fixedly provided on the top wall of the closing plate 4 facing the injection cylinder 3. The guide block 41 is conical. A sliding rod 411 is fixedly provided on the guide block 41 in the vertical direction away from the top of the closing plate 4.

[0057] refer to Figure 6 An elastic component 5 is provided between the closing plate 4 and the guide block 41. The elastic component 5 includes a fixed plate 51 and a second spring 52. The fixed plate 51 is located above the closing plate 4 and is cross-shaped. The fixed plate 51 is fixedly connected to the inner wall of the mounting base 2 at the mounting groove 21. The sliding rod 411 passes through the center of the fixed plate 51 away from the top of the guide block 41 and extends to the outside. The sliding rod 411 and the fixed plate 51 are slidably connected in the vertical direction. The second spring 52 is fixed between the guide block 41 and the fixed plate 51.

[0058] refer to Figure 6 A trigger assembly 6 is provided in the mounting slot 21. The trigger assembly 6 includes a probe 61 and a support plate 62. The support plate 62 is cross-shaped and is located below the sample injection cylinder 3. The support plate 62 is fixedly connected to the inner wall of the mounting base 2 at the mounting slot 21. The probe 61 is vertically positioned between the closing plate 4 and the support plate 62. The bottom end of the probe 61 is fixedly connected to the center position of the support plate 62. The diameter of the probe 61 is smaller than the inner diameter of the material passage cover 32.

[0059] When the sample inlet cylinder 3 is compressed, it moves closer to the support plate 62. At this time, the probe 61 extends into the material passage hood 32, thereby pressing the closing plate 4. The closing plate 4 drives the sliding rod 411 to move upward. At this time, the second spring 52 is in a compressed state, thus creating a gap between the closing plate 4 and the inner wall of the material passage hood 32. The material to be tested in the sample inlet cylinder 3 flows out along the gap. After the compression of the sample inlet cylinder 3 disappears, the sample inlet cylinder 3 moves away from the support plate 62. At the same time, the second spring 52 releases its elastic force, causing the closing plate 4 to return to its original position, thus making the closing plate 4 fit against the inner wall of the material passage hood 32.

[0060] refer to Figure 2 and Figure 7 The body 1 has a second storage groove 12 on the side wall facing the turntable 7. A second locking block 121 is slidably connected in the second storage groove 12. The side walls on both sides of the second locking block 121 are provided with a second inclined surface 1211. A fifth spring 122 is provided in the second storage groove 12. The two ends of the fifth spring 122 are fixedly connected to the second locking block 121 and the body 1, respectively. The side walls around the turntable 7 are provided with second locking slots 73 that fit and engage with the second locking block 121. The number of second locking slots 73 is the same as the number of mounting slots 21 and they are aligned one by one.

[0061] After the sample injection tube 3 is installed, the operator turns the knob 75 to rotate the turntable 7. During the rotation, the turntable 7 presses the second locking block 121 through the second inclined surface 1211, thereby retracting the second locking block 121 into the second receiving groove 12. After the second locking block 121 is aligned with the second slot 73, the fifth spring 122 releases its elastic force to push the second locking block 121 into the second slot 73. Thus, the operator can engage the second locking block 121 with different second slots 73 according to the sample injection sequence.

[0062] The implementation principle of an ion chromatograph for easy sample injection according to an embodiment of this application is as follows: The operator presses the third locking block 911 to retract it into the third receiving groove 91, and then pulls the moving rod 9 to adjust the distance between the turntable 7 and the mounting base 2 so that the sample injection tube 3 can be inserted. The operator places the sample injection tube 3 containing the sample to be detected into the mounting groove 21 in sequence. After the sample injection tube 3 is installed, the operator retracts the third locking block 911 into the third receiving groove 91 again, and then resets the turntable 7. During sample injection, the operator starts the drive motor 72, which, through the active bevel gear 721 and the driven bevel gear 821, drives the threaded sleeve 82 to bring the lead screw 8 closer to the mounting base 2. The lead screw 8 drives the sleeve 81 to press the sample injection cylinder 3, causing it to descend. At this time, the probe 61 extends into the material passage cover 32, causing the closing plate 4 to move upward, thus allowing the material in the sample injection cylinder 3 to flow out until the sample injection cylinder 3 is pressed against the support plate 62. At this point, the first locking block 831 disengages from the first locking groove 811, allowing the lead screw 8 to extend into the sample injection cylinder 3 and press the cover plate 3321, thereby completely pushing out the material in the sample injection cylinder 3. After the sample injection is completed, the drive motor 72 reverses, causing the lead screw 8 to move away from the mounting base 2, and the closing plate 4 to fit against the material passage cover 32. Simultaneously, the sample injection cylinder 3 and the push plate 33 return to their original positions. The operator rotates the turntable 7 to align the lead screw 8 and sleeve 81 with different sample injection cylinders 3 in sequence, so that the material in the sample injection cylinder 3 enters the machine body 1 sequentially according to the detection sequence. The above structure achieves the effect of improving detection efficiency.

[0063] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ion chromatograph for easy sample injection, comprising a body (1), wherein an injection port (11) is provided on one side wall of the body (1), characterized in that: A mounting base (2) is fixedly provided on one side of the inlet (11). Multiple mounting grooves (21) are opened through the upper surface of the mounting base (2). An inlet cylinder (3) is arranged vertically in the mounting groove (21). A movable seat (31) is fitted on the top of the inlet cylinder (3). The inlet cylinder (3) and the movable seat (31) are threaded together. A first spring (22) is fixed between the movable seat (31) and the mounting base (2). A material passage cover (32) is fixedly connected to the bottom end of the inlet cylinder (3). The material passage cover (32) is funnel-shaped and allows material to pass through. The cover (32) connects the mounting groove (21) and the sample inlet (3). A closing plate (4) is provided inside the material hood (32). An elastic component (5) is provided between the closing plate (4) and the guide block (41) to reset the closing plate (4). A trigger component (6) is provided inside the mounting groove (21) to move the closing plate (4). The mounting base (2) is fixedly connected to the sample inlet tube (23) at the end of the mounting groove (21) away from the moving base (31). The end of the sample inlet tube (23) away from the mounting base (2) extends into the sample inlet (11). The elastic component (5) includes a fixed plate (51) and a second spring (52). The fixed plate (51) is disposed above the closed plate (4). The fixed plate (51) is fixedly connected to the mounting base (2). A guide block (41) is fixedly disposed on the side wall of the closed plate (4) facing the fixed plate (51). A slide rod (411) is disposed vertically between the guide block (41) and the fixed plate (51). The bottom end of the slide rod (411) is fixedly connected to the end of the guide block (41) away from the closed plate (4). The top end of the slide rod (411) passes through the fixed plate (51) and extends to the outside. The slide rod (411) and the fixed plate (51) are slidably connected vertically. The second spring (52) is fixedly disposed between the guide block (41) and the fixed plate (51). The triggering component (6) includes a probe (61) and a support plate (62). The support plate (62) is located below the injection cylinder (3) and is fixedly connected to the mounting base (2). The probe (61) is fixed vertically on the side wall of the support plate (62) facing the injection cylinder (3). The diameter of the probe (61) is smaller than the inner diameter of the material hood (32).

2. The ion chromatograph for easy sample injection according to claim 1, characterized in that: A turntable (7) is provided above the mounting base (2). The turntable (7) is rotatably connected to the mounting base (2). A through hole (71) is provided through the side wall of the turntable (7) facing the mounting base (2). A lead screw (8) is slidably connected in the through hole (71). A sleeve (81) is provided at one end of the lead screw (8) near the sample inlet cylinder (3). A threaded sleeve (82) is threadedly connected to the circumferential side wall of the lead screw (8). The threaded sleeve (82) is rotatably connected to the turntable (7). A driven bevel gear (821) is fixedly provided on the circumferential side wall of the threaded sleeve (82). A drive motor (72) is installed on the side wall of the turntable (7) facing the threaded sleeve (82). A drive bevel gear (721) is fixedly provided on the output shaft of the drive motor (72). The drive bevel gear (721) meshes with the driven bevel gear (821).

3. An ion chromatograph for easy sample injection according to claim 2, characterized in that: The sample inlet tube (3) is provided with a pusher plate (33), and the upper surface of the pusher plate (33) is provided with a feed inlet (331). The feed inlet (331) is covered with a plug (332). The end of the plug (332) away from the feed hood (32) is fixed with a cover plate (3321). The diameter of the cover plate (3321) is larger than the diameter of the feed inlet (331).

4. An ion chromatograph for easy sample introduction according to claim 3, characterized in that: The push plate (33) is slidably connected to the sample inlet cylinder (3) in the vertical direction. The sleeve (81) is sleeved on the end of the lead screw (8) near the mounting base (2), and the sleeve (81) and the lead screw (8) are slidably connected in the vertical direction. The side wall of the lead screw (8) is provided with a first receiving groove (83). A first locking block (831) is slidably connected in the first receiving groove (83). The side walls on both sides of the first locking block (831) are provided with a first inclined surface (8311). A third spring (832) is fixed between the first locking block (831) and the lead screw (8). The inner wall of the sleeve (81) is provided with a first locking groove (811) that is compatible with the first locking block (831).

5. An ion chromatograph for easy sample injection according to claim 4, characterized in that: Both sides of the push plate (33) are fixedly provided with sliders (333). The inner wall of the injection cylinder (3) is provided with a sliding groove (34) that is adapted to slide with the sliders (333). A fourth spring (341) is fixed between the sliders (333) and the injection cylinder (3). A guide rod (342) is provided in the sliding groove (34). The end of the guide rod (342) is fixedly connected to the injection cylinder (3), and the guide rod (342) passes through the slider (333). The guide rod (342) and the slider (333) are slidably connected along the length direction of the guide rod (342).

6. An ion chromatograph for easy sample injection according to claim 2, characterized in that: The machine body (1) has a second storage groove (12) on the side wall facing the turntable (7). A second locking block (121) is slidably connected in the second storage groove (12). A second inclined surface (1211) is provided on both sides of the second locking block (121). A fifth spring (122) is fixed between the second locking block (121) and the machine body (1). A number of second slots (73) are provided on the side wall around the turntable (7) to engage with the second locking block (121). The number of second slots (73) is the same as the number of sample tubes (3) and they are aligned one by one.

7. An ion chromatograph for easy sample injection according to claim 2, characterized in that: The turntable (7) has a limiting block (74) fixed on the inner wall of the through hole (71), and the lead screw (8) has a limiting groove (84) that is adapted to slide with the limiting block (74) along its own length direction.

8. An ion chromatograph for easy sample injection according to claim 1, characterized in that: The mounting base (2) has a fixed rod (24) fixed on its side wall facing the turntable (7). The fixed rod (24) has a sliding cavity (241) on its side wall facing the turntable (7). A moving rod (9) is slidably connected in the sliding cavity (241). The end of the moving rod (9) away from the fixed rod (24) is rotatably connected to the turntable (7). A third storage groove (91) is opened on the side wall of the moving rod (9). A third locking block (911) is slidably connected in the third storage groove (91). A sixth spring (912) is fixed between the third locking block (911) and the moving rod (9). The side wall of the fixed rod (24) has a through-hole third slot (242) that is adapted to engage with the third locking block (911). The two third locking blocks (911) are respectively opened at both ends of the fixed rod (24), and the third slot (242) is connected to the sliding cavity (241).

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