A closed inductively coupled plasma mass spectrometer and use method thereof

Abstract

The invention relates to the technical field of mass spectrometers, and specifically discloses a closed inductively coupled plasma mass spectrometer and a method for using the same. The inductively coupled plasma mass spectrometer comprises a dredging mechanism arranged on the outside of a cooling seat for dredging an atomizer, and a cleaning mechanism arranged on the front of the cooling seat for cleaning an atomization chamber in the cooling seat and a cooling cover. The invention facilitates the simultaneous back-drawing and back-flushing of a clogged atomizer through the dredging mechanism, thereby improving the efficiency of dredging the atomizer. The atomizer is immersed in nitric acid through a soaking component, and the atomizer can be back-flushed and back-drawn during the soaking process, thereby further improving the efficiency of dredging the atomizer. The dredging mechanism cooperates with the cleaning mechanism, and the atomization chamber is cleaned without disassembling the cooling cover. When testing elements of different raw materials, it is not necessary to repeatedly disassemble and assemble the cooling cover to clean the atomization chamber, and the atomization chamber can be taken out as a whole for cleaning, thereby improving the flexibility of cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of mass spectrometers, and in particular to a closed inductively coupled plasma mass spectrometer and a use method thereof. Background Art

[0002] Inductively coupled plasma mass spectrometer is an analytical instrument used in the fields of chemistry, biology, agronomy, and forestry. It consists of a plasma generator, atomization chamber, torch, quadrupole mass spectrometer, and a fast-channel submultiplier tube (called an ion detector or collector). Its main uses are trace and ultra-trace multi-element analysis and isotope ratio analysis.

[0003] Publication No. CN118116789A discloses a closed inductively coupled plasma mass spectrometer, and the problem raised in the background technology is that the shielding of the mass spectrometer ICP-MS for analyzing radioactive samples is insufficient, and there are certain hidden dangers to the safety of the experimenters. The mass spectrometer is a modification of the domestic inductively coupled plasma mass spectrometer (ICP-MS), which is applied to the analysis of trace elements in post-processing process samples, solves the shielding problem of ICP-MS analysis of radioactive samples, and greatly protects the safety of the experimenters.

[0004] Based on the existing technology, there are the following problems:

[0005] When using an existing closed inductively coupled plasma mass spectrometer, the raw material is usually diluted into a liquid first, and then the diluted liquid raw material is transported to the atomizer through a peristaltic pump for atomization, so that the liquid raw material is in an aerosol state, and then enters the rectangular tube through the atomization chamber, etc., to test the elemental composition of the raw material. However, when the liquid raw material is atomized after dilution, raw materials such as powders and particles in the liquid raw material are easy to block the atomizer, affecting the atomization effect, thereby affecting the inspection effect of the closed inductively coupled plasma mass spectrometer. In addition, due to the structural characteristics of the atomizer itself, such as the side wall diameter gradually decreasing from one end to the other end, and the injection tube inside it is easy to be damaged, etc., it is usually not possible to use mechanical dredging or ultrasonic cleaning to dredge the means, and the dredging efficiency is low. In addition, the atomization chamber connected to the atomizer is usually installed in a cooling shell. When testing different raw materials or cleaning residual impurities, it is usually necessary to first open the cooling shell and then remove the atomization chamber, etc., which is cumbersome and has certain shortcomings. In order to solve the above problems, a closed inductively coupled plasma mass spectrometer and a method for use are proposed. Summary of the invention

[0006] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a closed inductively coupled plasma mass spectrometer and a method of use, which is convenient for unclogging a clogged nebulizer by simultaneously performing backflushing and backdrawing, and is convenient for backflushing and backdrawing the nebulizer during the immersion process, thereby improving the unclogging efficiency and reducing damage to the nebulizer, and is convenient for cleaning the nebulization chamber without disassembling the cooling shell to avoid affecting the inspection use.

[0007] To achieve the above purpose, the present invention is implemented by the following technical scheme: a closed inductively coupled plasma mass spectrometer, comprising an instrument body, a cooling seat detachably arranged inside the instrument body, and a cooling cover detachably arranged on the top of the cooling seat, an atomization chamber is arranged between the cooling seat and the cooling cover, the atomization chamber comprises a chamber body, an end cover and a fixture for fixing the chamber body and the end cover, a compensation tube extending outside the cooling seat is fixedly arranged on the front of the end cover, an atomizer is detachably arranged at the front end of the compensation tube, and also comprises a dredging mechanism arranged on the outside of the cooling seat for dredging the atomizer and a cleaning mechanism arranged on the front of the cooling seat for cleaning the atomization chamber in the cooling seat and the cooling cover, the dredging mechanism comprises:

[0008] A first conduit is used to deliver the dredging liquid into the atomizer so as to simultaneously back-pump and back-flush the atomizer by cooperating with the peristaltic pump;

[0009] The cleaning mechanism comprises:

[0010] The mounting assembly is arranged on the outside of the end cover and the fixture, and is used for disassembling and assembling the end cover and the fixture. The bottom of the mounting assembly is provided with a disassembling assembly for respectively driving the end cover and the fixture to move so that the chamber body, the end cover and the fixture can be disassembled. The top of the cooling cover is provided with a cleaning assembly for flushing the chamber body and the end cover.

[0011] A liquid storage tank and a dirt storage tank are fixedly provided at the bottom of the cooling seat, and the dredging mechanism also includes:

[0012] The pump body is fixedly arranged on the outer wall of the liquid storage tank, the water inlet end of the pump body is fixedly provided with a liquid inlet pipe extending into the liquid storage tank, the water discharge end of the pump body is fixedly provided with a second conduit, the second conduit is communicated with the first conduit, a third conduit is fixedly arranged on the upper end of the side wall of the dirt storage tank, the third conduit and the first conduit both extend to the front of the cooling seat, and the third conduit and the first conduit are both provided with connectors at one end located on the front of the cooling seat, a fourth conduit and a fifth conduit are respectively provided on the outer walls of the first conduit and the third conduit, the liquid inlet pipe, the second conduit, the fourth conduit, the fifth conduit and the side walls of the first conduit are all provided with valves, and a soaking component connected with the fourth conduit and the fifth conduit and used for soaking the atomizer is provided on the front of the cooling seat.

[0013] The soaking assembly comprises:

[0014] The seat body is fixedly arranged on the front side of the cooling seat, a cover body is fixedly arranged on the front side of the seat body by bolts, a placement groove for sleeve-mounting the atomizer is provided on one side where the cover body and the seat body are close to each other, a liquid storage groove connected with the placement groove is provided on one side where the cover body and the seat body are close to each other and located outside the placement groove, so that the atomizer is immersed in the dredging liquid, and the fourth conduit and the fifth conduit are both connected with the liquid storage groove, and are respectively located at the upper end of the seat body and the lower end of the seat body;

[0015] The first sealing plate is fixedly arranged on one side of the cover body close to the seat body and is U-shaped. A sealing groove adapted to the first sealing plate is provided on one side of the seat body close to the cover body and located on the outside of the liquid storage tank. A second sealing plate is fixedly arranged on the lower end of the side where the first sealing plate and the seat body are close to each other. The second sealing plate is semi-annular and is spliced ​​to form a ring after the cover body and the seat body are fixed.

[0016] The top and bottom of the chamber body are respectively fixed with an air delivery pipe and a sewage pipe, and the bottom of the sewage pipe extends into the sewage storage box. The bottom inner wall of the cooling seat is fixed with a first mounting seat and a second mounting seat. The chamber body is sleeved in the second mounting seat, and the fixer and the end cover are sleeved in the first mounting seat. The bottom of the cooling cover, the top of the first mounting seat and the top of the second mounting seat are provided with a groove for sleeve-mounting the atomization chamber. The mounting assembly includes:

[0017] A first mounting plate is sleeved on the outer walls of the fixer and the end cover;

[0018] The second mounting plate is located on the opposite side of the first mounting plate and is sleeved on the outer wall of the fixer and the end cover. The first mounting plate and the second mounting plate are both designed in a semi-annular shape. A plug plate is fixedly provided on the side of the first mounting plate close to the second mounting plate. A slot adapted to the plug plate is provided on the side of the second mounting plate close to the first mounting plate. The plug plate is inserted into the slot and pressed tightly so that the first mounting plate and the second mounting plate are assembled in an annular shape to be installed on the outer wall of the fixer and the end cover. A screw for fixing the plug plate is threadedly connected to the top of the second mounting plate to fix the second mounting plate and the first mounting plate;

[0019] The limiting plates are fixedly arranged on the inner side walls of the first mounting plate and the second mounting plate and are arranged at intervals. The outer walls of the fixer and the end cover are spaced apart with limiting grooves adapted to the limiting plates.

[0020] The disassembly assembly comprises:

[0021] A disassembly plate is sleeved in the groove at the top of the first mounting seat at intervals and is designed in a semi-annular shape. The inner sides of the disassembly plate are respectively fixedly connected to the first mounting plate and the second mounting plate, and the outer sides of the disassembly plate are respectively slidably connected to the groove at the top of the first mounting seat to limit the horizontal movement of the fixer and the end cover. A disassembly groove is provided on the bottom inner wall of the groove at the top of the first mounting seat, and a disassembly block is sleeved on the inner wall of the disassembly groove. The top of the disassembly block is fixedly connected to the bottom of the disassembly plate;

[0022] The first threaded rod is rotatably arranged on the front side of the first mounting seat and is hollow in design. The second threaded rod is rotatably arranged on the inner wall of the first threaded rod, and the central axes of the first threaded rod and the second threaded rod are on the same straight line. The side walls of the first threaded rod and the second threaded rod are respectively threadedly connected with two disassembly blocks arranged at intervals to drive the fixer and the end cover to move separately. The first threaded rod and the second threaded rod both extend to the front side of the cooling seat, and a self-locking component is arranged on the side wall of one end of the first threaded rod and the second threaded rod located outside the cooling seat.

[0023] One end of the first threaded rod located in the cooling seat is located between the two disassembly blocks, one end of the second threaded rod located in the cooling seat is rotatably connected to a side of the first mounting seat close to the second mounting seat, and the side walls of one end of the first threaded rod and the second threaded rod located outside the cooling seat are both fixedly sleeved with knobs;

[0024] The self-locking component comprises:

[0025] A limiting ring, fixedly sleeved on a side wall of one end of the first threaded rod located between the two disassembling blocks, to limit the movement of the disassembling blocks;

[0026] The ratchet is fixedly sleeved on the side wall of one end of the first threaded rod and the second threaded rod outside the cooling seat, and a support seat is fixedly provided on the front side of the cooling seat and at the bottom of the first threaded rod.

[0027] The self-locking assembly also includes:

[0028] The pawls are rotatably arranged on the top of the support seat and are arranged at intervals. The pawls are respectively engaged with the ratchet wheels. The inner side of the pawls is fixedly provided with a first spring, and the bottom of the first spring is fixedly connected to the inner side of the support seat. The outer sides of the pawls are fixedly provided with a pull rope.

[0029] The block is fixedly sleeved on the outer wall of the pull rope, and a protective shell is fixedly provided on the top of the support seat and outside the ratchet and the pawl. A through hole for sleeved the pull rope is opened on the top of the protective shell, and the inner wall diameter of the through hole is smaller than the side wall diameter of the block.

[0030] A movable groove is provided on the top inner wall of the groove at the bottom of the cooling cover, and the movable groove is located between the chamber body and the end cover. The cleaning assembly includes:

[0031] A connecting rod is slidably arranged on the top of the cooling cover and extends to the bottom of the cooling cover. A base is fixedly arranged at the bottom of the connecting rod. Nozzles are fixedly arranged on both sides of the side wall of the base, and the two nozzles face the chamber body and the end cover respectively. A back plate is fixedly sleeved on the top of the connecting rod. A second spring is sleeved on the side wall of the connecting rod and located between the cooling cover and the back plate. One end of the second conduit away from the pump body extends into the base and is connected to the two nozzles respectively.

[0032] The bottom plate is fixed on the top of the cooling cover and is annular in design. A rotating shaft is rotatably arranged on the top of the bottom plate and on both sides of the abutment plate. The upper ends of the side walls of the rotating shaft are fixedly sleeved with pressure plates.

[0033] The bottom inner wall of the disassembly groove is designed to be inclined, and the inclination angle gradually increases from the first mounting seat to the second mounting seat, and a guide hole communicating with the disassembly groove is opened on a side of the first mounting seat close to the second mounting seat;

[0034] A guide groove is provided at the bottom of the second mounting seat, and a drainage pipe communicating with the dirt storage tank is fixedly provided on a side of the second mounting seat away from the first mounting seat, and the drainage pipe is communicated with the guide groove.

[0035] A method for using a closed inductively coupled plasma mass spectrometer, using the closed inductively coupled plasma mass spectrometer, the method comprises the following steps:

[0036] S1: When the atomizer is blocked, the atomizer is pulled out, and the atomizer is backwashed and back-drawn at the same time through the unblocking mechanism to unblock the atomizer. When the blockage is serious, the atomizer is immersed in the unblocking liquid through the unblocking mechanism, and the unblocking liquid is nitric acid to assist in unblocking;

[0037] S2: During long-term use, the atomization chamber is cleaned by nitric acid without removing the cooling seat and cooling cover, so that the atomization chamber can be cleaned when inspecting various raw materials without affecting the disassembly of the atomization chamber for cleaning.

[0038] The present invention provides a closed inductively coupled plasma mass spectrometer and a method of using the same. Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The unclogging mechanism of the present invention is convenient for simultaneously back-drawing and recoil-flushing a clogged atomizer, thereby improving the efficiency of unclogging the atomizer. The atomizer is immersed in nitric acid through the soaking component, and the atomizer can be recoiled and back-drawn during the soaking process, thereby further improving the efficiency of unclogging the atomizer. The nitric acid can be transported into the atomizing chamber through the unclogging mechanism. With the cooperation of the cleaning mechanism, the atomizing chamber can be cleaned without removing the cooling cover. When testing the elements of different raw materials, it is not necessary to repeatedly disassemble and assemble the cooling cover to clean the atomizing chamber. Moreover, it is convenient to take out the atomizing chamber as a whole for cleaning during long-term use, thereby improving the flexibility of cleaning.

[0040] 2. The present invention adjusts the connecting pipeline between the multi-way tube and the atomizer so that one end of the atomizer located in the compensation tube is connected to the first conduit, and the other end of the atomizer located outside the compensation tube is connected to the peristaltic pump under the action of the multi-way tube, and the drainage end of the peristaltic pump is connected to the third conduit, so that nitric acid is transported from the end of the atomizer located in the compensation tube through the pump body to achieve backwashing, and back-pumping can be performed through the peristaltic pump, so as to simultaneously backwash and back-pump the blocked atomizer, thereby improving the efficiency of unblocking.

[0041] 3. The present invention places the external pipe connected to the atomizer and the first conduit on the side close to each other of the second sealing plate through the soaking assembly, which does not affect the delivery of nitric acid while sealing. The external conduit connected to the atomizer and the peristaltic pump is extended to the outside of the seat body through the upper end of the placement groove, which is convenient for connection with the peristaltic pump, so as to facilitate backwashing and backdrawing during soaking, thereby improving the dredging efficiency;

[0042] By placing nitric acid between the base and the cover, and installing an atomizer before placing nitric acid between the base and the cover, contact between workers and nitric acid can be avoided. Nitric acid is corrosive to a certain extent, so accidental injury to workers can be avoided and safety hazards can be reduced.

[0043] 4. The present invention uses the disassembling assembly of the cleaning mechanism to disassemble the atomizing chamber, and moves the fixture and the end cover in sequence, so that the atomizing chamber can be cleaned in the cooling seat and the cooling cover through the cleaning assembly later. There is no need to frequently disassemble the cooling cover to clean the atomizing chamber when inspecting different raw materials. After the cleaning is completed, the end cover is reset first, and then the fixture is reset, and the atomizing chamber can be assembled, which is convenient for subsequent atomization. In addition, by setting a self-locking assembly, the two directions of horizontal movement of the fixture and the end cover are limited to ensure their stability and avoid affecting the subsequent atomization.

[0044] 5. The present invention facilitates the disassembly and assembly of the end cover, the fixer and the disassembly assembly through the installation assembly, thereby facilitating the removal of the atomization chamber as a whole, that is, facilitating the removal of the atomizer except for the cooling seat for cleaning and replacement, etc., and through the limiting plate and the limiting groove, the connection between the fixer and the end cover and the first mounting plate and the second mounting plate is limited to avoid affecting the stability of the movement of the end cover and the fixer driven by the disassembly assembly.

[0045] 6. The present invention uses a cleaning assembly to move the nozzle between the chamber body and the end cover when cleaning the atomizing chamber, so as to facilitate cleaning of the atomizing chamber. After cleaning, the nozzle and the like are reset to avoid affecting the reset of the end cover and the fixture, thereby facilitating actual cleaning use. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1The present invention is a schematic diagram of the overall structure of a closed inductively coupled plasma mass spectrometer;

[0047] Figure 2 It is a schematic diagram of the structure of the dredging mechanism of the present invention;

[0048] Figure 3 It is a schematic diagram of the structure of the dirt storage tank and the liquid storage tank of the present invention;

[0049] Figure 4 It is a schematic diagram of the structure of the soaking assembly of the present invention;

[0050] Figure 5 For the present invention Figure 4 A is a schematic diagram of the enlarged structure of the middle part;

[0051] Figure 6 It is a schematic structural diagram of the fourth conduit, the fifth conduit, the first sealing plate and the second sealing plate of the present invention;

[0052] Figure 7 It is a schematic cross-sectional structural diagram of a cooling seat and a cooling cover of the present invention;

[0053] Figure 8 It is a schematic diagram of the explosion structure of the cooling seat and the cooling cover of the present invention;

[0054] Fig. 9 It is a schematic diagram of the disassembled components, gas pipe and sewage pipe structure of the present invention;

[0055] Fig.10 It is a schematic diagram of the structure of the first threaded rod and the disassembly plate of the present invention;

[0056] Fig.11 It is a schematic structural diagram of the second threaded rod, the first threaded rod and the self-locking assembly of the present invention;

[0057] Fig.12 It is a schematic diagram of the explosion structure of the mounting assembly, atomization chamber, compensation tube and atomizer of the present invention;

[0058] Fig.13 It is a schematic diagram of the structure of the self-locking component of the present invention;

[0059] Fig.14 It is a schematic diagram of the cooling cover and the movable groove structure of the present invention;

[0060] Fig.15 It is a schematic diagram of the structure of the cleaning component of the present invention;

[0061] Fig.16 It is a schematic diagram of the first mounting seat and guide hole structure of the present invention.

[0062] Reference numerals in the above drawings: 1, instrument body; 2, cooling cover; 3, cleaning mechanism; 4, dredging mechanism; 5, cooling seat; 6, dirt storage tank; 7, liquid storage tank; 8, atomization chamber; 9, second mounting seat; 10, first mounting seat; 11, atomizer; 12, gas pipe; 13, sewage pipe; 14, compensation pipe; 15, moving groove; 16, guide hole;

[0063] 31. Disassemble the assembly; 32. Clean the assembly; 33. Install the assembly; 34. Self-locking assembly;

[0064] 311, first threaded rod; 312, disassembly plate; 313, second threaded rod;

[0065] 321, abutment plate; 322, nozzle; 323, base; 324, connecting rod; 325, bottom plate; 326, pressure plate;

[0066] 331, first mounting plate; 332, limiting plate; 333, second mounting plate; 334, plug plate;

[0067] 341, limiting ring; 342, ratchet; 343, stopper; 344, pawl;

[0068] 41. pump body; 42. first conduit; 43. fourth conduit; 44. immersion assembly; 45. second conduit; 46. third conduit; 47. fifth conduit;

[0069] 441, cover body; 442, seat body; 443, liquid storage tank; 444, placement tank; 445, second sealing plate; 446, first sealing plate;

[0070] 81. Chamber body; 82. Fixer; 83. End cover. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Fig.12A closed inductively coupled plasma mass spectrometer comprises an instrument body 1, a cooling seat 5 detachably arranged inside the instrument body 1 and a cooling cover 2 detachably arranged on the top of the cooling seat 5, an atomization chamber 8 is arranged between the cooling seat 5 and the cooling cover 2, the atomization chamber 8 comprises a chamber body 81, an end cover 83 and a fixture 82 for fixing the chamber body 81 and the end cover 83, a compensation tube 14 extending to the outside of the cooling seat 5 is fixedly arranged on the front side of the end cover 83, an atomizer 11 is detachably arranged at the front end of the compensation tube 14, and the atomizer 11 is connected to the atomizer 11 through a multi-way pipe. It is connected to a pipeline for conveying liquid raw materials, and conveys the liquid raw materials to the atomizer 11 through a peristaltic pump, and conveys the liquid raw materials to the instrument body 1 through the atomization chamber 8 and the gas pipe 12, so that the liquid raw materials are formed into an aerosol state through the atomizer 11, so as to facilitate the subsequent inspection of the elements of the raw materials. The instrument body 1 is a closed inductively coupled plasma mass spectrometer, and also includes a dredging mechanism 4 arranged on the outside of the cooling seat 5 for dredging the atomizer 11 and a cleaning mechanism 3 arranged on the front of the cooling seat 5 for cleaning the atomization chamber 8 in the cooling seat 5 and the cooling cover 2;

[0073] See also Figure 2 , Figure 3 and Figure 7 , the dredging mechanism 4 comprises:

[0074] The first conduit 42 is used to transport the dredging liquid into the atomizer 11, so as to simultaneously back-pump and back-flush the atomizer 11 by cooperating with the peristaltic pump;

[0075] A liquid storage tank 7 and a dirt storage tank 6 are fixedly provided at the bottom of the cooling seat 5, and the dredging mechanism 4 also includes:

[0076] A pump body 41 is fixedly arranged on the outer wall of the liquid storage tank 7. A liquid inlet pipe extending into the liquid storage tank 7 is fixedly arranged at the water inlet end of the pump body 41. A second conduit 45 is fixedly arranged at the water discharge end of the pump body 41. The second conduit 45 is communicated with the first conduit 42. A third conduit 46 is fixedly arranged on the upper end of the side wall of the dirt storage tank 6. The third conduit 46 and the first conduit 42 both extend to the front of the cooling seat 5. The third conduit 46 and the first conduit 42 are both provided with connectors at one end of the third conduit 46 and the first conduit 42 located on the front of the cooling seat 5. A fourth conduit 43 and a fifth conduit 47 are respectively provided on the outer walls of the first conduit 42 and the third conduit 46. Valves are provided on the side walls of the liquid inlet pipe, the second conduit 45, the fourth conduit 43, the fifth conduit 47 and the first conduit 42. A soaking assembly 44 connected to the fourth conduit 43 and the fifth conduit 47 and used for soaking the atomizer 11 is provided on the front of the cooling seat 5.

[0077] In the specific implementation, the clogged atomizer 11 is removed, and the connecting pipe between the multi-way pipe and the atomizer 11 is adjusted so that one end of the atomizer 11 located in the compensation pipe 14 is connected to the first conduit 42, and one end of the atomizer 11 located outside the compensation pipe 14 is connected to the peristaltic pump under the action of the multi-way pipe, and the drainage end of the peristaltic pump is connected to the third conduit 46, so that under the action of the peristaltic pump and the pump body 41, the nitric acid in the liquid storage tank 7 is transported from the end of the atomizer 11 located in the compensation pipe 14 through the liquid inlet pipe, the pump body 41 and the second conduit 45 through the pump body 41 to achieve backwashing, and the peristaltic pump can be used for backdrawing, so that the backdrawn nitric acid is transported to the sewage storage tank 6 through the third conduit 46, so that the clogged atomizer 11 is backwashed and backdrawn at the same time, thereby improving the efficiency of dredging;

[0078] The connectors at the ends of the first conduit 42 and the third conduit 46 facilitate connection to external pipes and facilitate operation. The assembly and disassembly of the atomizer 11 and its connection with the peristaltic pump are prior arts and will not be described in detail here.

[0079] See also Figure 4 , Figure 5 , Figure 6 and Figure 7 , the soaking assembly 44 comprises:

[0080] The seat body 442 is fixedly arranged on the front side of the cooling seat 5, and a cover body 441 is fixedly arranged on the front side of the seat body 442 by bolts. A placement groove 444 for sleeve-mounting the atomizer 11 is provided on the side where the cover body 441 and the seat body 442 are close to each other, and a liquid storage groove 443 connected to the placement groove 444 is provided on the side where the cover body 441 and the seat body 442 are close to each other and located outside the placement groove 444, so that the atomizer 11 can be immersed in the dredging liquid. The fourth conduit 43 and the fifth conduit 47 are both connected to the liquid storage groove 443, and are respectively located at the upper end of the seat body 442 and the lower end of the seat body 442;

[0081] The first sealing plate 446 is fixedly arranged on one side of the cover body 441 close to the seat body 442 and is U-shaped. A sealing groove matched with the first sealing plate 446 is provided on the side of the seat body 442 close to the cover body 441 and located on the outer side of the liquid storage tank 443. A second sealing plate 445 is fixedly arranged on the lower end of the side where the first sealing plate 446 and the seat body 442 are close to each other. The second sealing plate 445 is semi-annular and is spliced ​​to form a ring after the cover body 441 and the seat body 442 are fixed.

[0082] In specific implementation, when the atomizer 11 needs to be soaked for dredging, the cover body 441 is removed to prevent the atomizer 11 from being placed in the placement groove 444. At this time, the external pipe connected to the atomizer 11 and the first conduit 42 is placed on the side close to each other of the second sealing plate 445, so as to seal the external pipe without affecting the delivery of nitric acid, so as to facilitate backwashing after soaking for a specified time. The external conduit connected to the atomizer 11 and the peristaltic pump is extended to the outside of the seat body 442 through the upper end of the placement groove 444, so as to facilitate connection with the peristaltic pump, so as to facilitate backwashing and backwashing after soaking for a specified time, thereby facilitating backwashing and backwashing during soaking, thereby improving the dredging efficiency;

[0083] After the atomizer 11 is placed, the cover 441 is fixed, and the cover 441 and the seat 442 can be sealed by the first sealing plate 446 and the sealing groove. The external pipe connecting the atomizer 11 and the first conduit 42 can be sealed by the second sealing plate 445 to prevent nitric acid from leaking out. Then, the nitric acid is discharged into the liquid storage tank 443 through the fourth conduit 43. Since the liquid storage tank 443 is connected to the placement tank 444, the atomizer 11 can be soaked. After the soaking and dredging is completed, the nitric acid is discharged into the sewage storage tank 6 through the fifth conduit 47;

[0084] Nitric acid is placed between the seat 442 and the cover 441, and the atomizer 11 is installed before the nitric acid is placed between the seat 442 and the cover 441 to avoid contact between the staff and the nitric acid. Nitric acid is corrosive to a certain extent, so accidental injury to the staff is avoided to reduce safety hazards.

[0085] Example 2: Please refer to Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 The difference between this embodiment and the first embodiment is that the cleaning mechanism 3 includes:

[0086] The mounting assembly 33 is arranged on the outside of the end cover 83 and the fixer 82, and is used for disassembling and assembling the end cover 83 and the fixer 82. A disassembling assembly 31 is provided at the bottom of the mounting assembly 33 for respectively driving the end cover 83 and the fixer 82 to move so that the chamber body 81, the end cover 83 and the fixer 82 can be disassembled. A cleaning assembly 32 is provided on the top of the cooling cover 2 for flushing the chamber body 81 and the end cover 83.

[0087] The top and bottom of the chamber body 81 are respectively fixed with an air delivery pipe 12 and a sewage pipe 13, and the bottom of the sewage pipe 13 extends into the sewage storage box 6. The bottom inner wall of the cooling seat 5 is fixed with a first mounting seat 10 and a second mounting seat 9. The chamber body 81 is sleeved in the second mounting seat 9, and the fixer 82 and the end cover 83 are sleeved in the first mounting seat 10. The bottom of the cooling cover 2, the top of the first mounting seat 10 and the top of the second mounting seat 9 are provided with a groove for sleeve-mounting the atomization chamber 8.

[0088] See also Fig.12 , the installation component 33 includes:

[0089] A first mounting plate 331 is sleeved on the outer walls of the fixer 82 and the end cover 83;

[0090] The second mounting plate 333 is located on the opposite side of the first mounting plate 331 and is sleeved on the outer wall of the fixer 82 and the end cover 83. The first mounting plate 331 and the second mounting plate 333 are both semi-annular in design. A plug plate 334 is fixedly provided on the side of the first mounting plate 331 close to the second mounting plate 333. A slot adapted to the plug plate 334 is provided on the side of the second mounting plate 333 close to the first mounting plate 331. The plug plate 334 is inserted into the slot and pressed tightly so that the first mounting plate 331 and the second mounting plate 333 are assembled in an annular shape to be installed on the outer wall of the fixer 82 and the end cover 83. A screw for fixing the plug plate 334 is threadedly connected to the top of the second mounting plate 333 to fix the second mounting plate 333 and the first mounting plate 331.

[0091] The limiting plates 332 are fixedly disposed on the inner side walls of the first mounting plate 331 and the second mounting plate 333 and are arranged at intervals. The outer walls of the fixer 82 and the end cover 83 are spaced apart to form limiting grooves adapted to the limiting plates 332 .

[0092] See also Figure 7 , Fig. 9 , Fig.10 and Fig.11 , the disassembly assembly 31 includes:

[0093] The disassembly plate 312 is sleeved in the groove at the top of the first mounting seat 10 at intervals and is designed in a semi-annular shape. The inner sides of the disassembly plate 312 are respectively fixedly connected to the first mounting plate 331 and the second mounting plate 333, and the outer sides of the disassembly plate 312 are respectively slidably connected to the groove at the top of the first mounting seat 10 to limit the horizontal movement of the fixer 82 and the end cover 83. A disassembly groove is provided on the bottom inner wall of the groove at the top of the first mounting seat 10, and a disassembly block is sleeved on the inner wall of the disassembly groove at intervals. The top of the disassembly block is fixedly connected to the bottom of the disassembly plate 312;

[0094] The first threaded rod 311 is rotatably disposed on the front side of the first mounting seat 10 and is hollow in design. The inner wall of the first threaded rod 311 is rotatably provided with the second threaded rod 313, and the central axes of the first threaded rod 311 and the second threaded rod 313 are on the same straight line. The side walls of the first threaded rod 311 and the second threaded rod 313 are respectively threadedly connected to two disassembly blocks arranged at intervals to drive the fixer 82 and the end cover 83 to move separately. The first threaded rod 311 and the second threaded rod 313 both extend to the front side of the cooling seat 5, and a self-locking component 34 is provided on the side wall of one end of the first threaded rod 311 and the second threaded rod 313 located outside the cooling seat 5.

[0095] When the atomizer 11 needs to be cleaned in the cooling cover 2 and the cooling seat 5, the knob on the side wall of the second threaded rod 313 is first rotated to drive the second threaded rod to rotate. When the second threaded rod 313 rotates, the disassembly block, the disassembly plate 312, the mounting assembly 33 and the fixture 82 are moved. Then, the knob on the outer wall of the first threaded rod 311 is rotated to drive the first threaded rod 311 to rotate. When the first threaded rod 311 rotates, the end cover 83 is moved, so that the end cover 83 is separated from the chamber body 81. Then, the nozzle 322 of the cleaning assembly 32 is moved down to between the chamber body 81 and the end cover 83 to rinse the chamber body 81 and the end cover 83. The atomization chamber 8 can be cleaned without disassembling the cooling cover 2. There is no need to frequently disassemble the cooling cover 2 to clean the atomization chamber 8 when inspecting different raw materials. After the cleaning is completed, the operation is reversed. The end cover 83 is reset first, and then the fixture 82 is reset, and the atomization chamber 8 can be assembled.

[0096] The mounting assembly 33 facilitates the disassembly of the holder 82 and the end cover 83, and facilitates the separation of the end cover 83 and the holder 82 from the disassembly assembly 31 when the atomizing chamber 8 is used for a long time or when it is necessary to replace the atomizing chamber 8, so as to facilitate the removal of the atomizing chamber 8 as a whole. In the specific implementation;

[0097] Open the cooling cover 2. The cooling cover 2 and the cooling seat 5 are usually fixed by bolts and can be disassembled and assembled. This is the prior art and will not be elaborated here. After removing the cooling cover 2, remove the bolts of the fixing plug plate 334, and then remove the first mounting plate 331 and the second mounting plate 333 from the fixer 82 and the end cover 83. Then, remove the fixer 82, the end cover 83 and the chamber body 81. When installing, just perform the reverse operation. Through the cooperation of the limiting plate 332 and the limiting groove, the fixer 82 and the end cover 83 are limited between the first mounting plate 331 and the second mounting plate 333 respectively to avoid affecting the stability of the end cover 83 and the fixer 82 driven by the disassembly component 31.

[0098] One end of the first threaded rod 311 located inside the cooling seat 5 is located between the two disassembly blocks, and one end of the second threaded rod 313 located inside the cooling seat 5 is rotatably connected to a side of the first mounting seat 10 close to the second mounting seat 9, and the side walls of the ends of the first threaded rod 311 and the second threaded rod 313 located outside the cooling seat 5 are both fixedly sleeved with knobs;

[0099] See also Fig.11 and Fig.13 , the self-locking assembly 34 comprises:

[0100] A limiting ring 341 is fixedly sleeved on a side wall of one end of the first threaded rod 311 located between the two disassembling blocks to limit the movement of the disassembling blocks;

[0101] The ratchet 342 is fixedly sleeved on the side wall of one end of the first threaded rod 311 and the second threaded rod 313 outside the cooling seat 5 , and a support seat is fixedly provided on the front of the cooling seat 5 and at the bottom of the first threaded rod 311 .

[0102] The self-locking assembly 34 also includes:

[0103] The ratchet 344 is rotatably disposed on the top of the support seat and is arranged at intervals. The ratchet 344 is respectively engaged with the ratchet wheels 342. A first spring is fixedly disposed on the inner side of the ratchet 344, and the bottom of the first spring is fixedly connected to the inner side of the support seat. A pull rope is fixedly disposed on the outer side of the ratchet 344.

[0104] The stopper 343 is fixedly mounted on the outer wall of the pull rope, and a protective shell is fixedly mounted on the top of the support seat and outside the ratchet 342 and the pawl 344. A through hole for mounting the pull rope is opened on the top of the protective shell, and the inner wall diameter of the through hole is smaller than the side wall diameter of the stopper 343.

[0105] In the specific implementation, when the fixer 82 and the end cover 83 are separated from the chamber body 81, the ratchet 342 and the pawl 344 are separated first to avoid hindering the rotation of the first threaded rod 311 and the second threaded rod 313. When the cleaning is completed and the atomization chamber 8 is assembled, the first threaded rod 311 drives the end cover 83 to reset. After the end cover 83 is reset, the disassembly block at the bottom of the end cover 83 is pressed against the limiting ring 341, and at this time, one direction of the horizontal movement of the end cover 83 is limited, and the ratchet 342 and the pawl 344 are engaged to limit the other direction of the horizontal movement of the end cover 83, thereby ensuring the stability of the end cover 83 and avoiding affecting the subsequent use of the atomized raw materials.

[0106] After the holder 82 is reset, the disassembly block at the bottom of the holder 82 is pressed against the inner wall of the disassembly groove. At this time, the horizontal movement of the holder 82 is limited in one direction, and the ratchet 342 and the pawl 344 are engaged to limit the horizontal movement of the holder 82 in another direction, thereby ensuring the stability of the holder 82 and avoiding loosening of the chamber body 81 and the end cover 83, thereby avoiding affecting the subsequent atomization use.

[0107] The pawl 344 can be easily pulled by pulling the rope, thereby facilitating the separation of the ratchet 342 and the pawl 344, and the stopper 343 is provided to limit the pull rope and prevent it from entering the protective shell, which is convenient for actual use. The protective shell protects the outer sides of the ratchet 342 and the pawl 344 to avoid accidental injury.

[0108] See also Fig.12 , Fig.14 , Fig.15 and Fig.16 The top inner wall of the groove at the bottom of the cooling cover 2 is provided with a movable groove 15, and the movable groove 15 is located between the chamber body 81 and the end cover 83, and the cleaning assembly 32 includes:

[0109] The connecting rod 324 is slidably disposed on the top of the cooling cover 2 and extends to the bottom of the cooling cover 2. A base 323 is fixedly disposed at the bottom of the connecting rod 324. Nozzles 322 are fixedly disposed on both sides of the side wall of the base 323, and the two nozzles 322 face the chamber body 81 and the end cover 83 respectively. A retaining plate 321 is fixedly sleeved on the top of the connecting rod 324. A second spring is sleeved on the side wall of the connecting rod 324 and located between the cooling cover 2 and the retaining plate 321. One end of the second conduit 45 away from the pump body 41 extends into the base 323 and is connected to the two nozzles 322 respectively.

[0110] The bottom plate 325 is fixedly disposed on the top of the cooling cover 2 and is annular in design. A rotating shaft is rotatably disposed on the top of the bottom plate 325 and on both sides of the abutment plate 321 , and a pressure plate 326 is fixedly sleeved on the upper end of the side wall of the rotating shaft.

[0111] The bottom inner wall of the disassembly groove is designed to be inclined, and the inclination angle gradually increases from the first mounting seat 10 to the second mounting seat 9, and a guide hole 16 communicating with the disassembly groove is opened on one side of the first mounting seat 10 close to the second mounting seat 9;

[0112] A guide groove is formed at the bottom of the second mounting seat 9 , and a drainage pipe communicating with the dirt storage tank 6 is fixedly provided on a side of the second mounting seat 9 away from the first mounting seat 10 , and the drainage pipe is communicated with the guide groove.

[0113] In a specific implementation, after the end cover 83 is separated from the chamber body 81, the connecting rod 324 is pressed, so that the connecting rod 324 drives the base 323 and the nozzle 322 to move downward, that is, the nitric acid is discharged into the nozzle 322 through the pump body 41 and the second conduit 45, and sprayed into the chamber body 81 and the end cover 83 through the nozzle 322, so as to clean the chamber body 81 and the end cover 83. The cleaned nitric acid flows through the groove and the disassembly groove at the top of the first mounting seat 10, and is discharged into the dirt storage box 6 through the guide hole 16, the guide groove and the drain pipe, so as to facilitate the collection of the used nitric acid.

[0114] After the nozzle 322 is moved downward to the specified position, the bottom of the plate 321 is fitted with the top of the bottom plate 325, and the nozzle 322 cannot move downward any further. Then, the pressing plate 326 is rotated to the top of the plate 321, thereby limiting the upward movement of the plate 321 and stabilizing the nozzle 322 in a position convenient for spraying nitric acid into the chamber body 81 and the end cover 83. After the cleaning is completed, the pressing plate 326 is reset, and the nozzle 322 is reset under the action of the second spring. At this time, the nozzle 322 is located in the moving groove 15 to avoid affecting the reset of the holder 82 and the end cover 83.

[0115] Slide blocks are fixedly provided on both sides of the side wall of the connecting rod 324 , and a slide groove matched with the slide block is provided on the top of the cooling cover 2 to limit the connecting rod 324 so that the two nozzles 322 face the chamber body 81 and the end cover 83 respectively.

[0116] The embodiment of the present invention further provides a method for using a closed inductively coupled plasma mass spectrometer, using a closed inductively coupled plasma mass spectrometer, the method comprising the following steps:

[0117] S1: When the atomizer 11 is blocked, the atomizer 11 is pulled out, and the atomizer 11 is backwashed and back-drawn at the same time through the unblocking mechanism 4 to unblock the atomizer 11. When the blockage is serious, the atomizer 11 is immersed in an unblocking liquid through the soaking component 44 of the unblocking mechanism 4, and the unblocking liquid is nitric acid to assist unblocking;

[0118] During the specific implementation, the clogged atomizer 11 is removed, and the atomizer 11 is connected with a multi-way tube. Under the action of the peristaltic pump, the pump body 41 and the peristaltic pump back-pump and recoil the atomizer 11 to improve the dredging efficiency. When the back-pumping and recoil dredging effects are not obvious, the cover body 441 and the seat body 442 are opened, the atomizer 11 is placed in the placement groove 444, and the cover body 441 is covered. The atomizer 11 can be immersed in nitric acid to further improve the dredging efficiency.

[0119] S2: During long-term use, the end cover 83 and the chamber body 81 are separated by disassembling the assembly 31, so that nitric acid can be sprayed into the chamber body 81 and the end cover 83 through the cleaning assembly 32, that is, the atomization chamber 8 is cleaned by nitric acid without disassembling the cooling seat 5 and the cooling cover 2, so that the atomization chamber 8 can be cleaned when inspecting various raw materials, and the installation assembly 33 does not affect the disassembly of the atomization chamber 8 for cleaning.

[0120] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0121] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0122] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed inductively coupled plasma mass spectrometer, comprising an instrument body, a cooling seat detachably arranged inside the instrument body, and a cooling cover detachably arranged on the top of the cooling seat, an atomization chamber is arranged between the cooling seat and the cooling cover, the atomization chamber comprises a chamber body, an end cover, and a fixture for fixing the chamber body and the end cover, a compensation tube extending outside the cooling seat is fixedly arranged on the front side of the end cover, and an atomizer is detachably arranged at the front end of the compensation tube, characterized in that: It also includes a dredging mechanism arranged outside the cooling seat for dredging the atomizer and a cleaning mechanism arranged on the front of the cooling seat for cleaning the atomizing chamber inside the cooling seat and the cooling cover, wherein the dredging mechanism includes: A first conduit is used to deliver the dredging liquid into the atomizer so as to simultaneously back-pump and back-flush the atomizer by cooperating with the peristaltic pump; The cleaning mechanism comprises: An installation assembly is arranged on the outside of the end cover and the holder, and is used for disassembling the end cover and the holder. A disassembly assembly is arranged at the bottom of the installation assembly, which is used for driving the end cover and the holder to move respectively, so that the chamber body, the end cover and the holder can be disassembled. A cleaning assembly is arranged on the top of the cooling cover, which is used for flushing the chamber body and the end cover. A liquid storage tank and a dirt storage tank are fixedly provided at the bottom of the cooling seat, and the dredging mechanism also includes: A pump body is fixedly arranged on the outer wall of the liquid storage tank, a liquid inlet pipe extending into the liquid storage tank is fixedly arranged on the water inlet end of the pump body, a second conduit is fixedly arranged on the water discharge end of the pump body, the second conduit is communicated with the first conduit, a third conduit is fixedly arranged on the upper end of the side wall of the dirt storage tank, the third conduit and the first conduit both extend to the front of the cooling seat, and a connector is arranged on one end of the third conduit and the first conduit located on the front of the cooling seat, a fourth conduit and a fifth conduit are respectively arranged on the outer walls of the first conduit and the third conduit, a valve is arranged on the side walls of the liquid inlet pipe, the second conduit, the fourth conduit, the fifth conduit and the first conduit, and a soaking assembly connected with the fourth conduit and the fifth conduit and used for soaking the atomizer is arranged on the front of the cooling seat; The top and bottom of the chamber body are respectively fixed with an air delivery pipe and a sewage pipe, and the bottom of the sewage pipe extends into the sewage storage box. The bottom inner wall of the cooling seat is fixed with a first mounting seat and a second mounting seat. The chamber body is sleeved in the second mounting seat, and the fixer and the end cover are sleeved in the first mounting seat. The bottom of the cooling cover, the top of the first mounting seat and the top of the second mounting seat are provided with a groove for sleeve-mounting the atomization chamber. The mounting assembly includes: A first mounting plate is sleeved on the outer walls of the fixer and the end cover; The second mounting plate is located on the opposite side of the first mounting plate and is sleeved on the outer wall of the fixer and the end cover. The first mounting plate and the second mounting plate are both designed in a semi-annular shape. A plug plate is fixedly provided on the side of the first mounting plate close to the second mounting plate. A slot adapted to the plug plate is provided on the side of the second mounting plate close to the first mounting plate. The plug plate is inserted into the slot and pressed tightly so that the first mounting plate and the second mounting plate are assembled in an annular shape to be installed on the outer wall of the fixer and the end cover. A screw for fixing the plug plate is threadedly connected to the top of the second mounting plate to fix the second mounting plate and the first mounting plate; The limiting plates are fixedly arranged on the inner side walls of the first mounting plate and the second mounting plate and are arranged at intervals, and the outer walls of the fixing device and the end cover are spaced apart to form limiting grooves adapted to the limiting plates; The disassembly assembly comprises: A disassembly plate is sleeved in the groove at the top of the first mounting seat at intervals and is designed in a semi-annular shape. The inner sides of the disassembly plate are respectively fixedly connected to the first mounting plate and the second mounting plate, and the outer sides of the disassembly plate are respectively slidably connected to the groove at the top of the first mounting seat to limit the horizontal movement of the fixer and the end cover. A disassembly groove is provided on the bottom inner wall of the groove at the top of the first mounting seat, and a disassembly block is sleeved on the inner wall of the disassembly groove. The top of the disassembly block is fixedly connected to the bottom of the disassembly plate; The first threaded rod is rotatably arranged on the front side of the first mounting seat and is hollow in design. The second threaded rod is rotatably arranged on the inner wall of the first threaded rod, and the central axes of the first threaded rod and the second threaded rod are on the same straight line. The side walls of the first threaded rod and the second threaded rod are respectively threadedly connected with two disassembly blocks arranged at intervals to drive the fixer and the end cover to move separately. The first threaded rod and the second threaded rod both extend to the front side of the cooling seat, and a self-locking component is arranged on the side wall of one end of the first threaded rod and the second threaded rod located outside the cooling seat.

2. A closed inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The soaking assembly comprises: The seat body is fixedly arranged on the front side of the cooling seat, a cover body is fixedly arranged on the front side of the seat body by bolts, a placement groove for sleeve-mounting the atomizer is provided on one side where the cover body and the seat body are close to each other, a liquid storage groove connected with the placement groove is provided on one side where the cover body and the seat body are close to each other and located outside the placement groove, so that the atomizer is immersed in the dredging liquid, and the fourth conduit and the fifth conduit are both connected with the liquid storage groove, and are respectively located at the upper end of the seat body and the lower end of the seat body; The first sealing plate is fixedly arranged on one side of the cover body close to the seat body and is U-shaped. A sealing groove adapted to the first sealing plate is provided on one side of the seat body close to the cover body and located on the outside of the liquid storage tank. A second sealing plate is fixedly arranged on the lower end of the side where the first sealing plate and the seat body are close to each other. The second sealing plate is semi-annular and is spliced ​​to form a ring after the cover body and the seat body are fixed.

3. A closed inductively coupled plasma mass spectrometer according to claim 1, characterized in that: One end of the first threaded rod located in the cooling seat is located between the two disassembly blocks, one end of the second threaded rod located in the cooling seat is rotatably connected to a side of the first mounting seat close to the second mounting seat, and the side walls of one end of the first threaded rod and the second threaded rod located outside the cooling seat are both fixedly sleeved with knobs; The self-locking component comprises: A limiting ring, fixedly sleeved on a side wall of one end of the first threaded rod located between the two disassembling blocks, to limit the movement of the disassembling blocks; The ratchet is fixedly sleeved on the side wall of one end of the first threaded rod and the second threaded rod outside the cooling seat, and a support seat is fixedly provided on the front side of the cooling seat and at the bottom of the first threaded rod.

4. A closed inductively coupled plasma mass spectrometer according to claim 3, characterized in that: The self-locking assembly also includes: The pawls are rotatably arranged on the top of the support seat and are arranged at intervals. The pawls are respectively engaged with the ratchet wheels. The inner side of the pawls is fixedly provided with a first spring, and the bottom of the first spring is fixedly connected to the inner side of the support seat. The outer sides of the pawls are fixedly provided with a pull rope. The block is fixedly sleeved on the outer wall of the pull rope, and a protective shell is fixedly provided on the top of the support seat and outside the ratchet and the pawl. A through hole for sleeved the pull rope is opened on the top of the protective shell, and the inner wall diameter of the through hole is smaller than the side wall diameter of the block.

5. A closed inductively coupled plasma mass spectrometer according to claim 1, characterized in that: A movable groove is provided on the top inner wall of the groove at the bottom of the cooling cover, and the movable groove is located between the chamber body and the end cover. The cleaning assembly includes: A connecting rod is slidably arranged on the top of the cooling cover and extends to the bottom of the cooling cover. A base is fixedly arranged at the bottom of the connecting rod. Nozzles are fixedly arranged on both sides of the side wall of the base, and the two nozzles face the chamber body and the end cover respectively. A back plate is fixedly sleeved on the top of the connecting rod. A second spring is sleeved on the side wall of the connecting rod and located between the cooling cover and the back plate. One end of the second conduit away from the pump body extends into the base and is connected to the two nozzles respectively. The bottom plate is fixed on the top of the cooling cover and is annular in design. A rotating shaft is rotatably arranged on the top of the bottom plate and on both sides of the abutment plate. The upper ends of the side walls of the rotating shaft are fixedly sleeved with pressure plates.

6. A closed inductively coupled plasma mass spectrometer according to claim 1, characterized in that: The bottom inner wall of the disassembly groove is designed to be inclined, and the inclination angle gradually increases from the first mounting seat to the second mounting seat, and a guide hole communicating with the disassembly groove is opened on a side of the first mounting seat close to the second mounting seat; A guide groove is provided at the bottom of the second mounting seat, and a drainage pipe communicating with the dirt storage tank is fixedly provided on a side of the second mounting seat away from the first mounting seat, and the drainage pipe is communicated with the guide groove.

7. A method for using a closed inductively coupled plasma mass spectrometer, characterized in that: Using a closed inductively coupled plasma mass spectrometer according to any one of claims 1 to 6, the method comprises the following steps: S1: When the atomizer is blocked, the atomizer is pulled out, and the atomizer is backwashed and back-drawn at the same time through the unblocking mechanism to unblock the atomizer. When the blockage is serious, the atomizer is immersed in the unblocking liquid through the unblocking mechanism, and the unblocking liquid is nitric acid to assist in unblocking; S2: During long-term use, the atomization chamber is cleaned by nitric acid without removing the cooling seat and cooling cover, so that the atomization chamber can be cleaned when inspecting various raw materials without affecting the disassembly of the atomization chamber for cleaning.

Images