An inductively coupled plasma mass spectrometer with automatic sampling structure

Abstract

The present invention discloses an inductively coupled plasma mass spectrometer with an automatic sampling structure, which specifically relates to the technical field of mass spectrometers, including a mass spectrometer body, a mounting platform installed at the bottom of one side of the mass spectrometer body; a sample feed tray installed on the mounting platform, and a plurality of test tube bodies are restricted on the sample feed tray. The switching sample feed mechanism of the present invention completes the sampling work of the solution in the test tube body when the sampling tube moves up and down, and synchronously drives the sample feed tray to complete the active rotation switching when the sampling tube moves up and resets, thereby completing the continuous active switching sampling operation of the plurality of test tube bodies on the sample feed tray, improving the sampling efficiency, and eliminating the need for manual operation by technicians, saving time and labor, and adding a shielding mechanism on the sample feed tray, which is used to complete the top shielding of the plurality of test tube bodies to prevent external impurities from falling into the test tube body, and at the same time, the shielding mechanism is linked with the switching sample feed mechanism, so that the overall sampling work is carried out safely and stably.

Description

Technical Field

[0001] The invention relates to the technical field of mass spectrometers, in particular to an inductively coupled plasma mass spectrometer with an automatic sampling structure. Background Art

[0002] The inductively coupled plasma mass spectrometer is used to dissolve the substance to be tested, set the volume, and then atomize the raw material into the detection device after sampling through the atomization device. The atomized raw material particles are ionized by high-temperature heating, and the information on the internal components of the raw material can be obtained after spectral analysis inside the analysis chamber;

[0003] When the inductively coupled plasma mass spectrometer is taking samples, technicians need to repeatedly send samples of different concentrations into the atomization device in turn and wait for subsequent testing. This greatly increases the difficulty of the technician's work and requires repeated sampling operations, which is time-consuming and labor-intensive, affecting the detection efficiency.

[0004] Reference is made to a sample injection device for an inductively coupled plasma mass spectrometer disclosed in the patent with publication number CN113451103B. The sample injection device controls a driven wheel device to make intermittent reciprocating motion through an active wheel device, so that a slide device located on the side controls a sampling device to realize cyclic intermittent control of in, out, and in sampling. At the same time, a cylinder installed on the top of the sampling device cooperates with a piston to realize the effect of quantitative sampling.

[0005] The above-mentioned sampling device can complete the sampling of samples by controlling the driving wheel device, the driven wheel device, the lifting device and the sampling device separately. However, the sampling device needs to control the driving wheel device, the sampling device and the lifting device separately to complete the intermittent sampling action, which increases the control difficulty. The sampling device and the storage device on the lifting device may collide with each other by mistake, resulting in poor sampling efficiency and prone to sampling errors, making it impossible to perform the sampling work continuously.

[0006] At the same time, the sampling device provides samples through the storage device. After a single sampling is completed, the sample in the storage device still needs to be replaced to complete the sampling work, which also increases the difficulty of sampling. In addition, the storage device is not provided with a shielding and protective structure, so the sample is easily contaminated during the sampling process, affecting the accuracy of subsequent detection and being not conducive to the stable progress of the detection work. Summary of the invention

[0007] The object of the present invention is to provide an inductively coupled plasma mass spectrometer with an automatic sampling structure to solve the above technical problems.

[0008] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0009] The invention discloses an inductively coupled plasma mass spectrometer with an automatic sampling structure, comprising a mass spectrometer body, a mounting platform installed at the bottom of one side of the mass spectrometer body, a sampling tray installed on the mounting platform, a plurality of test tube bodies restricted on the sampling tray, a switching sampling mechanism installed on the mounting platform at one side of the sampling tray, the switching sampling mechanism is used to complete the switching sampling action for the plurality of test tube bodies, the cyclic sampling operation is completed by actively switching the sampling tray by the switching sampling mechanism, a shielding mechanism is added to the sampling tray, the shielding mechanism is used to complete the top shielding work for the plurality of test tube bodies, and the shielding mechanism is linked with the switching sampling mechanism, during the action of the switching sampling mechanism, the synchronous linkage shielding mechanism rises to complete synchronous avoidance with the plurality of test tube bodies, and a limiting mechanism is added to the switching sampling mechanism, and the position restriction of the sampling tray is completed by the linkage and cooperation between the switching sampling mechanism and the limiting mechanism.

[0010] Furthermore, the sample introduction plate includes a rotating plate, which is rotatably connected to the mounting table, and a switching gear ring is sleeved on the outside of the rotating plate, a limit ring is installed above the rotating plate at intervals, and a plurality of limit through holes are arranged in a circular array on the limit ring, and a plurality of limit grooves are arranged in a circular array on the rotating plate, and active limitation of the test tube body is achieved through the cooperation of the limit through holes and the limit grooves, and an open area is opened through the center of the rotating plate.

[0011] Furthermore, the switching injection mechanism includes a lifting frame vertically arranged on the upper surface of the mounting table, a lifting block is slidably installed in the lifting frame, and a cylinder is installed on the side of the lifting frame facing the mass spectrometer body, the output end of the cylinder is transmission-connected with the lifting block, a cross arm is detachably installed on the side of the lifting block away from the mass spectrometer body, an adapter is detachably installed at the tail of the cross arm, and a sampling tube is detachably installed at the bottom of the adapter.

[0012] Furthermore, a connecting shaft is rotatably installed at the top of one side of the lifting frame through a bracket, a one-way bearing is connected to the front end of the connecting shaft, and a power gear is transmission-connected to the one-way bearing. The one-way bearing completes the one-way transmission of the power gear, and a No. 1 bevel gear is concentrically fixedly installed at the tail of the connecting shaft, and a driving gear plate is detachably installed on one side of the lifting block, and the driving gear plate can engage with the power gear.

[0013] Furthermore, a driving shaft is rotatably installed on one side of the lifting frame below the connecting shaft through a bracket, and the bottom of the driving shaft is rotatably connected to the mounting platform, and a No. 2 bevel gear is concentrically installed on the top of the driving shaft, and the No. 2 bevel gear is meshed with the No. 1 bevel gear, and a linkage gear is fixed on the bottom sleeve of the driving shaft, and the linkage gear is meshed with the switching gear ring.

[0014] Furthermore, the shielding mechanism includes an adjusting frame installed on the mounting table, an adjusting table is slidably engaged with the adjusting frame, an adjusting screw is passed through the top of the adjusting frame through a threaded engagement, the bottom of the adjusting screw is rotatably connected to the top of the adjusting table, an adjusting area is provided in the adjusting table, a No. 1 wedge block is slidably engaged with the top of the adjusting area, a push spring is installed between the No. 1 wedge block and the adjusting area, the push spring drives the No. 1 wedge block to move toward the rotating disk, and a No. 2 wedge block is slidably pushed and pulled at the bottom of the adjusting area, the No. 2 wedge block is correspondingly fitted with the inclined surface of the No. 1 wedge block, and the lifting and lowering action of the No. 1 wedge block is completed by the forward and backward movement of the No. 2 wedge block.

[0015] Furthermore, two pressure arms are symmetrically slidably engaged on both sides of the adjusting table, and the two pressure arms are detachably fixedly connected to both sides of the No. 1 wedge block respectively, and a shielding ring is installed at intervals above the limit ring, and the shielding ring is detachably fixedly connected to the two pressure arms. The shielding ring is used to achieve synchronous shielding and protection of multiple test tube bodies, and a notch is opened on the side of the shielding ring facing the sampling tube.

[0016] Furthermore, limit plates are symmetrically installed on both sides of the adjustment frame, and the tail ends of the two limit plates are detachably fixedly connected to the adjustment platform through brackets, and a follower plate is installed at intervals on one side of the two limit plates, and the follower plate is detachably fixedly connected to the No. 2 wedge block, and two push rods are symmetrically fixedly penetrated on both sides of the follower plate, and the front ends of the two push rods slide through the two limit plates respectively, and reset springs are sleeved on the outside of the two push rods, and the two reset springs are correspondingly arranged between the follower plate and the two limit plates, and a contact shaft is installed at the front ends of the two push rods for common rotation, and a telescopic arm is detachably fixedly installed at the front end of the adapter, a push block is installed on the side of the telescopic arm facing the sample tray, and an inclined area is provided on the side of the push block facing the cross arm, and the extrusion and pushing of the contact shaft is completed by the cooperation between the inclined area and the push block.

[0017] Furthermore, the limiting mechanism includes a limiting frame installed at the bottom of one side of the lifting frame, and a limiting member is slidably engaged in the limiting frame. The front end of the limiting member corresponds to the setting of sliding out of the limiting frame, and a friction plate is removably installed at the front end of the limiting member. The friction plate is in friction contact with the side wall of the rotating disk, and a pulling spring is installed between the tail of the limiting member and the limiting frame. The pulling spring is used to pull the friction plate to separate from the rotating disk.

[0018] Furthermore, a restriction area is opened through the restriction member, a No. 3 wedge block is installed on the side of the restriction area away from the lifting frame, and a push arm is detachably installed at the bottom of the cross arm, and a No. 4 wedge block is installed on the side of the bottom of the push arm away from the lifting frame. The No. 3 wedge block is coordinated with the No. 4 wedge block, and the No. 3 wedge block is extruded by the No. 4 wedge block when the push arm moves downward, thereby synchronously driving the friction plate to make friction contact with the rotating disk.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is provided with a switching sampling mechanism, which completes the up and down movement of the sampling tube through a cylinder, completes the sampling work of the solution in the test tube body during the up and down movement of the sampling tube, and synchronously drives the sampling disk to complete active rotation switching during the upward movement and reset of the sampling tube, so that the test tube body of the lower concentration is switched to the sampling position, thereby completing the continuous active switching sampling operation of multiple test tube bodies on the sampling disk, improving the sampling efficiency, and eliminating the need for manual operation by technicians, reducing the difficulty of sampling, saving time and labor;

[0021] The present invention is provided with a shielding mechanism, which is used to shield the tops of multiple test tube bodies to prevent foreign impurities from falling into the test tube bodies. At the same time, the shielding mechanism is linked with the switching injection mechanism. When the sampling tube is moved up and reset, the shielding mechanism is synchronously driven to complete the upward movement, so that the shielding mechanism is separated from the test tube body at a certain interval, thereby avoiding obstruction to the injection plate during the switching work, reducing friction, and ensuring the stability of the test tube body during position conversion;

[0022] The present invention is provided with a limiting mechanism. When the sampling tube moves downward, the linkage push arm and the No. 4 wedge block move downward, driving the No. 4 wedge block to contact the No. 3 wedge block, and pushing the limiting member to move toward the rotating disk in the limiting frame, driving the friction plate to frictionally contact with the rotating disk, thereby completing the friction limitation of the rotating disk and ensuring the stability of sampling. When the sampling tube moves upward, the No. 4 wedge block is separated from the No. 3 wedge block. At this time, under the action of the pulling spring, the limiting member and the friction plate are pulled to move and separate from the rotating disk to complete unlocking.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall front view of the present invention;

[0025] Figure 2 It is a schematic diagram of installing the sample feeding plate of the present invention on the mounting table;

[0026] Figure 3 It is a schematic diagram of the sample introduction plate of the present invention;

[0027] Figure 4 It is a schematic diagram of the distribution of the switching injection mechanism and the injection plate of the present invention;

[0028] Figure 5 It is a schematic diagram of the shielding mechanism and the sample feeding tray of the present invention;

[0029] Figure 6 It is a schematic diagram of the shielding mechanism of the present invention;

[0030] Figure 7It is a schematic diagram of the distribution of the contact shaft and the adjustment platform of the present invention;

[0031] Figure 8 It is a schematic diagram of the installation of the first wedge block and the second wedge block in the adjustment platform of the present invention;

[0032] Fig. 9 It is a schematic diagram of the switching injection mechanism of the present invention;

[0033] Fig.10 It is a schematic diagram of the separation of the driving gear plate and the power gear of the present invention;

[0034] Fig.11 It is a schematic diagram of the restriction mechanism of the present invention;

[0035] Fig.12 It is a schematic diagram of the meshing of the driving gear plate and the power gear of the present invention;

[0036] Fig.13 It is a schematic diagram of installing the limiting mechanism of the present invention on the lifting frame.

[0037] In the figure: 1. mass spectrometer body; 2. peristaltic pump; 3. mounting table; 4. sample tray; 401. rotating disk; 402. switching gear ring; 403. limiting ring; 404. limiting through hole; 405. limiting groove; 406. open area; 5. test tube body; 6. lifting frame; 7. lifting block; 8. cylinder; 9. cross arm; 10. adapter; 11. sampling tube; 12. connecting shaft; 13. one-way bearing; 14. power gear; 15. No. 1 bevel gear; 16. driving gear plate; 17. driving shaft; 18. No. 2 bevel gear; 19. linkage gear; 2 0. Adjustment frame; 21. Adjustment platform; 22. Adjustment screw; 23. Adjustment zone; 24. Wedge block No. 1; 25. Push spring; 26. Wedge block No. 2; 27. Pressure arm; 28. Shielding ring; 29. ​​Notch; 30. Limiting plate; 31. Follower plate; 32. Push rod; 33. Return spring; 34. Contact shaft; 35. Telescopic arm; 36. Push block; 37. Tilting zone; 38. Limitation frame; 39. Limiting member; 40. Friction plate; 41. Pull spring; 42. Limitation zone; 43. Wedge block No. 3; 44. Push arm; 45. Wedge block No. 4. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Embodiment 1: The present invention provides a technical solution: Figures 1 to 13 As shown, an inductively coupled plasma mass spectrometer with an automatic sampling structure includes a mass spectrometer body 1, a peristaltic pump 2 is installed on one side of the mass spectrometer body 1, the peristaltic pump 2 is connected to the atomization structure inside the mass spectrometer body 1 through a pipeline, a mounting platform 3 is installed at the bottom of one side of the mass spectrometer body 1, a sampling tray 4 is installed on the mounting platform 3, a plurality of test tube bodies 5 are restricted on the sampling tray 4, the top of the test tube body 5 is open and the bottom is blocked, a switching sampling mechanism is installed on the mounting platform 3 on one side of the sampling tray 4, the switching sampling mechanism is connected to the peristaltic pump 2 through a pipeline, and the The switching injection mechanism is used to complete the switching injection action for multiple test tube bodies 5. The cyclic injection operation is completed by actively switching the injection tray 4 by the switching injection mechanism. A shielding mechanism is added to the injection tray 4. The shielding mechanism is used to complete the top shielding work of the multiple test tube bodies 5, and the shielding mechanism and the switching injection mechanism are linked and coordinated. During the action of the switching injection mechanism, the synchronous linkage shielding mechanism rises and completes the synchronous avoidance with the multiple test tube bodies 5. A limiting mechanism is added to the switching injection mechanism, and the position restriction of the injection tray 4 is completed by the linkage and cooperation between the switching injection mechanism and the limiting mechanism.

[0041] The sample introduction disk 4 includes a rotating disk 401, which is rotatably connected to the mounting table 3, and a switching gear ring 402 is sleeved on the outer side of the rotating disk 401, and a limit ring 403 is installed above the rotating disk 401 through a bracket interval, and a plurality of limit through holes 404 are arranged in a circular array on the limit ring 403, and the plurality of limit through holes 404 are all arranged through the limit ring 403, and a plurality of limit grooves 405 are arranged in a circular array on the rotating disk 401, and the plurality of limit grooves 405 are respectively recessed on the rotating disk 401, and the number of the plurality of limit grooves 405 is consistent with the number of the plurality of limit through holes 404, and the limit grooves 405 are distributed in parallel with the limit through holes 404, and the limit through holes 404 are arranged in cooperation with the test tube body 5, and the active restriction of the test tube body 5 is completed by the cooperation between the limit through holes 404 and the limit grooves 405, and an open area 406 is opened through the center of the rotating disk 401;

[0042] It should be noted that: when placing the test tube body 5: the technician places the test tube body 5 on the sample tray 4 according to the concentration range, and inserts the test tube body 5 into the limiting through hole 404 and the limiting groove 405, so as to complete the limiting of the test tube body 5, and before installing the test tube body 5, the hand wheel is turned accordingly, and under the guidance of the adjusting screw 22 and the adjusting frame 20, the shielding ring 28 is driven to move up to provide space for the installation of the test tube body 5, and then it can be reset.

[0043] Embodiment 2: Based on the switching injection mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the switching injection mechanism.

[0044] like Figure 4 , Fig. 9 , Fig.10 and Fig.12 As shown, the switching injection mechanism includes a lifting frame 6 vertically arranged on the upper surface of the mounting platform 3, the lifting frame 6 is detachably fixed to the mounting platform 3 by bolts, and the two sides of the lifting frame 6 are open in design, a lifting block 7 is slidably mounted in the lifting frame 6, and a cylinder 8 is installed on the side of the lifting frame 6 facing the mass spectrometer body 1, the output end of the cylinder 8 is transmission-connected with the lifting block 7, a cross arm 9 is detachably mounted on the side of the lifting block 7 away from the mass spectrometer body 1, an adapter 10 is detachably mounted at the tail of the cross arm 9, a sampling tube 11 is detachably mounted at the bottom of the adapter 10, and the sampling tube 11 is connected to the inside of the adapter 10, and the output end of the adapter 10 is connected to the peristaltic pump 2 through a pipeline;

[0045] Among them, a connecting shaft 12 is rotatably installed on the top of one side of the lifting frame 6 through a bracket, a one-way bearing 13 is connected to the front end of the connecting shaft 12, and a power gear 14 is transmission-connected to the one-way bearing 13. The one-way bearing 13 completes the one-way transmission of the power gear 14. When the driving gear plate 16 moves up relative to the mounting platform 3, the power gear 14 completes the power output through the one-way bearing 13 and the connecting shaft 12. When the driving gear plate 16 moves down relative to the mounting platform 3, the power gear 14 completes the disconnection output through the one-way bearing 13 and the connecting shaft 12. A bevel gear 15 is fixedly installed concentrically at the tail of the connecting shaft 12, and a driving toothed plate 16 is detachably installed on one side of the lifting block 7. The driving toothed plate 16 and the power gear 14 are normally spaced apart, so that the driving toothed plate 16 meshes with the power gear 14 after moving up a certain distance, so that the sampling tube 11 can be stably moved out of the test tube body 5, and the position of the driving toothed plate 16 is finely adjusted according to the rotation requirements of the sample feeding disk 4. The driving toothed plate 16 can mesh with the power gear 14, and a guide block is added to the top of the driving toothed plate 16. The guide block is tilted, and the guide block is used to guide the meshing of the driving tooth plate 16 and the power gear 14. A driving shaft 17 is rotatably installed on one side of the lifting frame 6 below the connecting shaft 12 through a bracket. The bottom of the driving shaft 17 is rotatably connected to the mounting table 3. A second bevel gear 18 is concentrically installed on the top of the driving shaft 17. The second bevel gear 18 is meshed with the first bevel gear 15, and a linkage gear 19 is fixedly sleeved at the bottom of the driving shaft 17. The linkage gear 19 is meshed with the switching gear ring 402. The number of teeth of the linkage gear 19 is The size can be adjusted so that the linkage gear 19 can obtain the rotation provided by the power gear 14, so that the linkage gear 19 can mesh with the switching gear ring 402 to complete the precise position conversion of the sample tray 4. A ratchet pawl mechanism is installed between the drive shaft 17 and the mounting platform 3. The ratchet is correspondingly sleeved on the outside of the drive shaft 17. The pawl is rotatably installed on the mounting platform 3 through a torsion spring. The pawl is engaged with the ratchet to complete the restriction. The ratchet pawl mechanism completes the one-way rotation restriction on the drive shaft 17 to avoid the problem of rotation of the sample tray 4.

[0046] It is worth noting that when switching sampling: a switching sampling mechanism is provided, the cylinder 8 is started, the lifting block 7 is pulled down in the lifting frame 6, and the sampling tube 11 is driven to move down synchronously through the cross arm 9, so that the sampling tube 11 is inserted into the test tube body 5 to wait for sampling, and the peristaltic pump 2 is subsequently started to complete the sampling work through the sampling tube 11, and the cylinder 8 is subsequently reset, pushing the lifting block 7 and the sampling tube 11 to move up and reset, and separate from the test tube body 5, and at the same time, the linkage driving gear plate 16 follows the upward movement, and when the sampling tube 11 moves out of the test tube body 5, the driving gear plate 16 is meshed with the power gear 14 during the upward movement, and the subsequent sampling tube 11 continues to move up, so that the power gear 14 rotates, and the one-way bearing 13 is locked at this time, so that the power is transmitted to the connecting shaft 12 through the driving gear plate 16 and the power gear 14, and the first bevel gear 15 and the second bevel gear 18 are connected. Under the meshing transmission, the driving shaft 17 is driven to rotate. At the same time, during the rotation of the driving shaft 17, the meshing of the linkage gear 19 and the switching gear ring 402 causes the sample tray 4 to rotate to complete the station switching, so that the test tube body 5 is continuously switched to the notch 29 to wait for sampling without the need to configure a separate power source, so that the overall sampling work can be carried out efficiently and stably, reducing the control difficulty of the technicians. Then the cylinder 8 drives the sampling tube 11 to move down again to complete the sampling. At this time, the one-way bearing 13 is unlocked, so that the power gear 14 can rotate freely and output power to the connecting shaft 12, that is, when the sampling tube 11 completes a sampling work up and down, the sample tray 4 is synchronously driven to complete a station switching, and the continuous sampling work of the test tube body 5 is completed. Repeating the above actions can complete the continuous completion of the sampling work of multiple test tube bodies 5 in different concentration ranges;

[0047] In the embodiment of the present invention, the limiting mechanism includes a limiting frame 38 installed at the bottom of one side of the lifting frame 6. The top and bottom of the limiting frame 38 are open in design. A limiting member 39 is slidably engaged in the limiting frame 38. The front end of the limiting member 39 corresponds to the setting of sliding out of the limiting frame 38. A friction plate 40 is detachably installed at the front end of the limiting member 39. The friction plate 40 is in friction contact with the side wall of the rotating disk 401, and a pulling spring 41 is installed between the tail of the limiting member 39 and the limiting frame 38. The pulling spring 41 is used to pull the friction plate 40 and the rotating disk 401 apart. A limiting area 42 is opened through the limiting member 39, and the limiting area 42 is away from the side of the lifting frame 6. A No. 3 wedge block 43 is installed, and a push arm 44 is detachably installed at the bottom of the cross arm 9. A No. 4 wedge block 45 is installed at the bottom of the push arm 44 away from the lifting frame 6. The lengths of the No. 3 wedge block 43, the No. 4 wedge block 45 and the push arm 44 can be adjusted, so that the No. 3 wedge block 43, the No. 4 wedge block 45 and the push arm 44 can cooperate with the up and down movement of the sampling tube 11, thereby completing the stable restriction of the sampling disk 4. The No. 3 wedge block 43 and the No. 4 wedge block 45 are arranged in cooperation, and the No. 3 wedge block 43 is squeezed by the No. 4 wedge block 45 when the push arm 44 moves downward, and the friction plate 40 is synchronously driven to make friction contact with the rotating disk 401;

[0048] It is worth noting that: when the sampling disk 4 is restricted: by providing a restriction mechanism, when the sampling tube 11 moves down into the test tube body 5, under this moving path, the linkage push arm 44 and the fourth wedge block 45 move down, driving the fourth wedge block 45 to contact the third wedge block 43, and pushing the restriction member 39 to move toward the rotating disk 401 in the restriction frame 38, driving the friction plate 40 to frictionally contact the rotating disk 401, thereby completing the friction restriction of the rotating disk 401 and ensuring the stability of sampling. When the sampling tube 11 moves up subsequently, the fourth wedge block 45 is separated from the third wedge block 43. At this time, under the action of the pulling spring 41, the pulling restriction member 39 and the friction plate 40 are moved to separate from the rotating disk 401 to complete the unlocking, thereby providing assistance for the subsequent station switching of the sampling disk 4.

[0049] Embodiment 3: Based on the shielding mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the shielding mechanism.

[0050] like Figures 5 to 8As shown, the shielding mechanism includes an adjusting frame 20 that is detachably fixedly mounted on the mounting platform 3, and the adjusting frame 20 is open-designed all around, and the bottom of the adjusting frame 20 extends correspondingly into the open area 406, and the adjusting frame 20 is separated from the rotating disk 401 and does not contact, and an adjusting platform 21 is slidably mounted in the adjusting frame 20, and an adjusting screw 22 is threadedly screwed through the top of the adjusting frame 20, and a hand wheel is installed on the top of the adjusting screw 22, and the bottom of the adjusting screw 22 is rotatably connected to the top of the adjusting platform 21, and an adjusting area 23 is provided in the adjusting platform 21, and the adjusting area 23 is open-designed all around the adjusting platform 21, and a No. 1 wedge block 24 is slidably mounted on the top of the adjusting area 23, and a push spring 25 is detachably fixedly mounted between the No. 1 wedge block 24 and the adjusting area 23, and the push spring 25 is detachably fixedly mounted between the No. 1 wedge block 24 and the adjusting area 23, and the push spring 2 The first wedge block 24 is driven to move toward the rotating disk 401, and a second wedge block 26 is provided at the bottom of the adjustment area 23 for sliding and pushing. The second wedge block 26 corresponds to and fits with the inclined surface of the first wedge block 24. The lifting and lowering action of the first wedge block 24 is completed by the forward and backward movement of the second wedge block 26. Two pressing arms 27 are symmetrically slidably engaged on both sides of the adjustment platform 21. The two pressing arms 27 are respectively detachably fixedly connected to both sides of the first wedge block 24, and a shielding ring 28 is installed above the limiting ring 403 at intervals. The shielding ring 28 is detachably fixedly connected to the two pressing arms 27. The shielding ring 28 is used to complete the synchronous shielding and protection of multiple test tube bodies 5, and a notch 29 is provided on the side of the shielding ring 28 facing the sampling tube 11. The notch 29 is used to actively avoid the upward and downward movement of the sampling tube 11.

[0051] It is worth noting that: when protecting the test tube body 5: a shielding mechanism is provided. Under normal circumstances, the push spring 25 drives the wedge block 24 No. 1 to move downward in the adjustment area 23, and the two pressure arms 27 drive the shielding ring 28 to move downward and flexibly contact the test tube body 5. The shielding ring 28 completes the top shielding of multiple test tube bodies 5 to avoid interference from external impurities. When the sampling tube 11 moves up and resets, the cross arm 9 pulls the telescopic arm 35 and the push block 36 to move upward, and the contact shaft 34 first contacts the inclined area 37 of the push block 36, and then guides the contact shaft 34 to contact the side wall of the push block 36 through the inclined area 37, thereby completing the pushing of the contact shaft 34, and when the push block 36 stops moving up It is still in contact with the side wall of the contact shaft 34, and compresses the two reset springs 33, so as to link the follower plate 31 and the second wedge block 26 to move forward. When the second wedge block 26 moves forward, the first wedge block 24 is lifted up, so that the shielding ring 28 is separated from the test tube body 5 to avoid the contact. When the sampling tube 11 moves downward, the contact shaft 34 is gradually separated from the push block 36, and is guided to separate from the push block 36 again through the inclined area 37. At this time, the two reset springs 33 push the second wedge block 26 to reset, and the push spring 25 drives the first wedge block 24 to reset. At this time, the shielding ring 28 blocks the test tube body 5 again, so that the shielding ring 28 and the sampling tube 11 are linked, ensuring the stable sampling work.

[0052] In the embodiment of the present invention, limit plates 30 are symmetrically installed on both sides of the adjustment frame 20, and the tail ends of the two limit plates 30 are detachably fixedly connected to the adjustment platform 21 through brackets, and a follower plate 31 is installed at intervals on one side of the two limit plates 30, and the follower plate 31 is detachably fixedly connected to the second wedge block 26, and two push rods 32 are symmetrically fixedly penetrated on both sides of the follower plate 31, and the front ends of the two push rods 32 slide through the two limit plates 30 respectively, and return springs 33 are sleeved on the outside of the two push rods 32, and the two return springs 33 are correspondingly arranged between the follower plate 31 and the two limit plates 30, and retaining rings are installed at the front ends of the two push rods 32, and the limit of the push rods 32 is completed by the retaining rings, and a contact shaft 34 is installed at the front ends of the two push rods 32 for common rotation, and a telescopic arm 35 is detachably fixedly installed at the front end of the adapter 10. A push block 36 is installed on the side of the telescopic arm 35 facing the sample tray 4, and an inclined area 37 is provided on the side of the push block 36 facing the cross arm 9. The inclined area 37 cooperates with the push block 36 to complete the extrusion and pushing of the contact shaft 34, and the length of the push block 36 is coordinated with the meshing movement length of the driving gear plate 16 and the power gear 14, and the length of the push block 36 can be adjusted so that the push block 36 can correspond to the meshing movement length of the driving gear plate 16 and the power gear 14. The length of the telescopic arm 35 can be adjusted so that the telescopic arm 35 can adapt to the position of the shielding ring 28 to complete the follow-up adjustment. The telescopic arm 35 specifically adopts one of an electric telescopic rod, a manual telescopic rod and a threaded sleeve telescopic rod to complete the telescopic action. In the upward movement path of the push block 36 following the cross arm 9, the contact shaft 34 and the second wedge block 26 are synchronously pushed forward.

[0053] The present invention provides an inductively coupled plasma mass spectrometer with an automatic sampling structure, and the specific working principle is as follows: first, the technician prepares the sample to be tested into different concentrations, and then respectively loads the solution into a plurality of test tube bodies 5 to wait for subsequent testing, and sequentially places them on a sample injection tray 4 according to the concentration range to complete the restriction, and then connects the adapter 10 of the switching sample injection mechanism with the peristaltic pump 2 through a pipeline, and then pumps the solution into the mass spectrometer body 1 through the peristaltic pump 2 to complete the subsequent testing;

[0054] By providing a switching sampling mechanism, the switching sampling mechanism completes the up and down movement of the sampling tube 11 through the cylinder 8, completes the sampling work of the solution in the test tube body 5 when the sampling tube 11 moves up and down, and synchronously drives the sampling disk 4 to complete active rotation switching when the sampling tube 11 moves up and resets, so that the test tube body 5 of the lower concentration is switched to the sampling position, thereby completing the continuous active switching sampling operation of multiple test tube bodies 5 on the sampling disk 4, improving the sampling efficiency, and eliminating the need for manual operation by technicians, reducing the difficulty of sampling, saving time and effort, and adding a shielding mechanism on the sampling disk 4, which is used to complete the top shielding of multiple test tube bodies 5 to prevent external impurities from falling into the test tubes In the main body 5, the shielding mechanism is linked with the switching injection mechanism. When the sampling tube 11 moves up and resets, the shielding mechanism is synchronously driven to complete the upward movement, so that the shielding mechanism is separated from the test tube body 5 at a certain distance, avoiding obstruction to the injection disk 4 during the switching work, reducing friction, ensuring the stability of the test tube body 5 during position conversion, and avoiding deviation. At the same time, with the assistance of the limiting mechanism, when the sampling tube 11 moves down for sampling, the linkage limiting mechanism is activated to complete the friction limitation of the injection disk 4, so that the injection disk 4 is stable, the sampling work of the sampling tube 11 is stable, sampling errors are avoided, the sampling accuracy is improved, and the difficulty of sampling for technicians is reduced.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An inductively coupled plasma mass spectrometer with an automatic sampling structure, comprising a mass spectrometer body (1), a mounting platform (3) being mounted on the bottom of one side of the mass spectrometer body (1), characterized in that: A sample injection tray (4) is mounted on the mounting platform (3), and a plurality of test tube bodies (5) are restricted on the sample injection tray (4). A sample switching mechanism is mounted on one side of the sample injection tray (4) on the mounting platform (3), and the sample switching mechanism is used to complete a sample switching action for the plurality of test tube bodies (5). The sample switching mechanism actively switches the sample injection tray (4) to complete a cyclic sample injection operation. A shielding mechanism is added to the sample feeding tray (4), and the shielding mechanism is used to shield the tops of the multiple test tube bodies (5). The shielding mechanism is linked with the sample feeding switching mechanism. When the sample feeding switching mechanism is in motion, the shielding mechanism is synchronously linked to rise and synchronously avoids the multiple test tube bodies (5). A limiting mechanism is added to the sample feeding switching mechanism, and the position of the sample feeding tray (4) is limited by the linkage between the sample feeding switching mechanism and the limiting mechanism. The sample feeding tray (4) comprises a rotating tray (401). The shielding mechanism comprises an adjustment frame (20) mounted on a mounting platform (3), an adjustment platform (21) being slidably engaged and mounted in the adjustment frame (20), an adjustment screw (22) being threadedly screwed through the top of the adjustment frame (20), the bottom of the adjustment screw (22) being rotatably connected to the top of the adjustment platform (21), an adjustment area (23) being provided in the adjustment platform (21), and a No. 1 wedge block (24) being slidably engaged in the top of the adjustment area (23); A push spring (25) is installed between the first wedge block (24) and the adjustment area (23). The push spring (25) drives the first wedge block (24) to move toward the rotating disk (401), and a second wedge block (26) is slidably pushed and pulled at the bottom of the adjustment area (23). The second wedge block (26) corresponds to and fits the inclined surface of the first wedge block (24). The first wedge block (24) is lifted and lowered by the forward and backward movement of the second wedge block (26).

2. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 1, characterized in that: The rotating disk (401) is rotatably connected to the mounting platform (3), and a switching gear ring (402) is sleeved on the outside of the rotating disk (401). A limit ring (403) is installed at intervals above the rotating disk (401), and a plurality of limit through holes (404) are arranged in a circular array on the limit ring (403), and a plurality of limit grooves (405) are arranged in a circular array on the rotating disk (401). Active restriction of the test tube body (5) is achieved through the cooperation of the limit through holes (404) and the limit grooves (405), and an open area (406) is opened through the center of the rotating disk (401).

3. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 2, characterized in that: The switching injection mechanism comprises a lifting frame (6) vertically arranged on the upper surface of the mounting platform (3), a lifting block (7) is slidably mounted in the lifting frame (6), and a cylinder (8) is mounted on the side of the lifting frame (6) facing the mass spectrometer body (1), the output end of the cylinder (8) is transmission-connected with the lifting block (7), a cross arm (9) is detachably mounted on the side of the lifting block (7) away from the mass spectrometer body (1), an adapter (10) is detachably mounted at the tail of the cross arm (9), and a sampling tube (11) is detachably mounted at the bottom of the adapter (10).

4. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 3, characterized in that: A connecting shaft (12) is rotatably mounted on the top of one side of the lifting frame (6) through a bracket, a one-way bearing (13) is connected to the front end of the connecting shaft (12), a power gear (14) is transmission-connected to the one-way bearing (13), the one-way bearing (13) completes the one-way transmission of the power gear (14), a first bevel gear (15) is coaxially fixedly mounted on the tail of the connecting shaft (12), and a driving tooth plate (16) is detachably mounted on one side of the lifting block (7), the driving tooth plate (16) being able to mesh with the power gear (14).

5. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 4, characterized in that: A drive shaft (17) is rotatably mounted on one side of the lifting frame (6) below the connecting shaft (12) through a bracket. The bottom of the drive shaft (17) is rotatably connected to the mounting platform (3). A second bevel gear (18) is concentrically mounted on the top of the drive shaft (17). The second bevel gear (18) is meshingly connected to the first bevel gear (15). A linkage gear (19) is fixedly sleeved on the bottom of the drive shaft (17). The linkage gear (19) is meshingly connected to the switching gear ring (402).

6. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 5, characterized in that: Two pressure arms (27) are symmetrically slidably engaged on both sides of the adjustment platform (21), and the two pressure arms (27) are respectively detachably fixedly connected to both sides of the first wedge block (24), and a shielding ring (28) is installed above the limit ring (403) at intervals. The shielding ring (28) is detachably fixedly connected to the two pressure arms (27), and synchronous shielding protection of multiple test tube bodies (5) is completed through the shielding ring (28), and a notch (29) is opened on the shielding ring (28) on the side facing the sampling tube (11).

7. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 6, characterized in that: Limiting plates (30) are symmetrically installed on both sides of the adjustment frame (20), and the tails of the two limiting plates (30) are detachably fixedly connected to the adjustment platform (21) through brackets. A follower plate (31) is installed at intervals on one side of the two limiting plates (30), and the follower plate (31) is detachably fixedly connected to the second wedge block (26). Two push rods (32) are symmetrically fixedly penetrated on both sides of the follower plate (31), and the front ends of the two push rods (32) are respectively slidably arranged through the two limiting plates (30). Reset springs (33) are sleeved on the outside of the two push rods (32), and the two reset springs (33) are correspondingly arranged between the follower plate (31) and the two limiting plates (30); A contact shaft (34) is rotatably mounted at the front ends of the two push rods (32), a telescopic arm (35) is detachably fixedly mounted at the front end of the adapter (10), a push block (36) is mounted on the side of the telescopic arm (35) facing the sample injection plate (4), and an inclined area (37) is provided on the side of the push block (36) facing the cross arm (9), and the contact shaft (34) is squeezed and pushed by the cooperation of the inclined area (37) and the push block (36).

8. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 7, characterized in that: The limiting mechanism comprises a limiting frame (38) mounted at the bottom of one side of the lifting frame (6), a limiting member (39) slidably engaged in the limiting frame (38), a front end of the limiting member (39) correspondingly slidingly passing through the limiting frame (38), a friction plate (40) detachably mounted at the front end of the limiting member (39), the friction plate (40) being in frictional contact with the side wall of the rotating disk (401), and a pulling spring (41) being mounted between the rear end of the limiting member (39) and the limiting frame (38), the pulling spring (41) being used to pull the friction plate (40) and separate the rotating disk (401).

9. The inductively coupled plasma mass spectrometer with an automatic sampling structure according to claim 8, characterized in that: A restriction area (42) is formed through the restriction member (39), a third wedge block (43) is installed on a side of the restriction area (42) away from the lifting frame (6), and a push arm (44) is detachably installed at the bottom of the cross arm (9), and a fourth wedge block (45) is installed on a side of the bottom of the push arm (44) away from the lifting frame (6). The third wedge block (43) and the fourth wedge block (45) are arranged in cooperation with each other, and the fourth wedge block (45) is linked to the fourth wedge block (45) by the downward movement of the push arm (44) to squeeze the third wedge block (43), thereby synchronously driving the friction plate (40) to frictionally contact with the rotating disk (401).

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