A chemical raw material detection device and detection method for shield construction area

Abstract

The invention discloses a chemical raw material detection device and a detection method for a shield construction area, comprising a liquid chromatograph, a plasma atomization mechanism connected to an output end of the liquid chromatograph, and a back-illumination detection mechanism connected to the output end of the plasma atomization mechanism; a liquid chromatographic separation mechanism based on a chromatographic column is provided in the liquid chromatograph; a separation liquid phase delivery pipe connected to the output end of the liquid chromatographic separation mechanism is provided inside the plasma atomization mechanism, a plurality of plasma electrode rods are provided around the separation liquid phase delivery pipe, and a plurality of plasma electrode plates are also provided inside the plasma atomization mechanism; firstly, the separation system of the liquid chromatograph is used to separate various components in the raw material to be detected, and each component is plasma atomized, and under laser irradiation, the plasma atomized component will generate fluorescence of a specific frequency, and the frequency and intensity of the fluorescence are detected, so as to analyze the composition and amount of each component.

Description

Technical Field

[0001] The invention relates to the technical field of chemical detection, and in particular to a chemical raw material detection device and a detection method for a shield construction area. Background Art

[0002] During shield construction, a variety of chemical raw materials are needed, and these chemical raw materials often contain plasticizers, short-chain chlorinated paraffins, mineral oils, anionic surfactants, etc. These are toxic and harmful substances that are often added to chemical raw materials;

[0003] Therefore, it is necessary to test these chemical raw materials to evaluate the composition and content of their harmful substances, and then evaluate and analyze the impact of using these chemical raw materials on the environment. At present, the detection of harmful substances in these raw materials is relatively cumbersome, and the accuracy of the test results needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a chemical raw material detection device and a detection method for a shield construction area, which can quickly and accurately analyze some harmful substance components in the raw materials.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A chemical raw material detection device and detection method for a shield construction area, comprising a liquid chromatograph, a plasma atomization mechanism connected to an output end of the liquid chromatograph, and a back-illuminated detection mechanism connected to an output end of the plasma atomization mechanism;

[0007] The liquid chromatograph has a liquid chromatographic separation mechanism based on a chromatographic column;

[0008] A separation liquid phase delivery pipe connected to the output end of the liquid chromatography separation mechanism is provided inside the plasma atomization mechanism, a plurality of plasma electrode rods are provided around the separation liquid phase delivery pipe, and a plurality of plasma electrode plates are also provided inside the plasma atomization mechanism;

[0009] The back-illuminated detection mechanism includes a horizontally placed detection mechanism shell, a plurality of reflective prisms located at the bottom of the detection mechanism shell, an optical lens group fixed to the open end of the reflective prism, a fluorescent photoreceptor connected to the outer end of the optical lens group, and a plurality of laser generators arranged on the side wall of the detection mechanism shell.

[0010] Preferably, a plasma magnetic confinement ring is provided inside the plasma atomization mechanism.

[0011] Description: The plasma magnetic confinement ring is an annular permanent magnet. Under the magnetic field confinement of the plasma magnetic confinement ring, it is beneficial to the flow stability of the plasma atomization components.

[0012] Preferably, a magnetic constraint mechanism is provided outside the detection mechanism shell, and the magnetic constraint mechanism includes a plurality of magnetic constraint bodies fixed outside the detection mechanism shell, the magnetic constraint bodies extend in a direction parallel to the axis of the detection mechanism shell, and the magnetic constraint bodies have a plurality of electromagnetic winding coils.

[0013] Description: The strong magnetic field generated by multiple electromagnetic winding coils in the magnetic confinement mechanism can control and confine the plasma atomization components in the area near the center of the detection mechanism shell, maintain the overall stability of the plasma atomization components, and help ensure the accuracy of the final detection results.

[0014] Preferably, a plasma stabilizing mechanism is connected between the plasma atomizing mechanism and the back-illuminated detection mechanism, and the plasma stabilizing mechanism includes a stabilizing mechanism shell connected to the atomizing mechanism shell, an electrode support outer ring coaxial with the atomizing mechanism shell is fixed to the inner side wall of the stabilizing mechanism shell, and an electrode support inner ring coaxial with the atomizing mechanism shell is fixed to the inner side of the electrode support outer ring;

[0015] An annular plasma channel is formed between the inner side of the electrode support outer ring and the electrode support inner ring;

[0016] A plurality of outer electrode rings are fixed on the inner side wall of the electrode support outer ring, and a plurality of inner electrode rings are fixed on the outer side of the electrode support inner ring;

[0017] A plurality of permanent magnetic rings are arranged inside the electrode support outer ring;

[0018] The distance between two adjacent outer electrode rings is 150-200% of the distance between the plasma channels;

[0019] Ion wind guide cones are fixed at both ends of the electrode support inner ring.

[0020] Description: In the plasma stabilization mechanism, when the plasma atomized components pass through the plasma channel, under the action of each "plasma curtain wall", the plasma atomized components can maintain a plasma state well.

[0021] Preferably, a cooling mechanism is provided in the plasma stabilizing mechanism, the cooling mechanism comprising a plurality of outer ring cooling holes arranged in the outer ring of the electrode support, and a plurality of inner ring cooling holes arranged in the inner ring of the electrode support, the outer ring cooling holes and the inner ring cooling holes both extending along an axis parallel to the tube shell of the stabilizing mechanism;

[0022] The stabilizing mechanism tube shell is connected with a coolant input pipe and a coolant output pipe;

[0023] The cooling input ring is connected to one end of each outer ring cooling hole and the inner ring cooling hole, and the cooling output ring is connected to the other end of each outer ring cooling hole and the inner ring cooling hole.

[0024] Description: The cooling mechanism can timely cool and dissipate the heat of the electrode support outer ring and the electrode support inner ring to avoid excessive temperature of the electrode support outer ring and the electrode support inner ring, thereby affecting the stability of the plasma arc operation.

[0025] Preferably, a magnetron acceleration mechanism is connected between the plasma stabilization mechanism and the back-illuminated detection mechanism, and the magnetron acceleration mechanism includes a magnetron acceleration tube shell connected to the stabilization mechanism tube shell, and the other end of the magnetron acceleration tube shell is connected to the detection mechanism tube shell. A hollow magnetron containing ring shell is fixed to the outside of the magnetron acceleration tube shell, and multiple groups of coaxially arranged accelerating electromagnetic windings are fixed inside the magnetron containing ring shell.

[0026] Description: The magnetron acceleration mechanism continuously accelerates the plasma atomized components under the action of a strong magnetic field, making the plasma atomized components more evenly dispersed, thereby ensuring the accuracy of subsequent test results.

[0027] Preferably, a plurality of ceramic wafers arranged along a radial plane thereof are fixed in the magnetron acceleration mechanism.

[0028] Description: Multiple ceramic chips can play a good role in guiding the circulating plasma atomization components and maintain the overall stability of the plasma atomization components. Moreover, the ceramic chips are insulating materials and will not have a negative impact on the plasma atomization components.

[0029] Preferably, a plurality of heat dissipation fins are fixed to the outer end of the magnetron acceleration mechanism.

[0030] Note: The heat sink is a copper heat sink that dissipates the heat generated by each accelerating electromagnetic winding when it is working to ensure its normal operation.

[0031] Preferably, the method for detecting chemical raw materials by using a chemical raw material detection device in a shield construction area as described above comprises the following steps:

[0032] S1. Prepare raw material solution:

[0033] The raw materials to be tested are prepared into a solution with a mass concentration of ~%;

[0034] S2. Separation by chromatography:

[0035] The prepared raw material solution is input into the chromatographic column of the liquid chromatography separation mechanism, and the components in the raw material solution are separated under the separation migration action of the mobile phase, and the components are discharged from the output end of the chromatographic column in sequence;

[0036] S3, plasma atomization:

[0037] The components discharged from the output end of the chromatographic column are transported to the separation liquid phase transport pipe, the plasma electrode rod and the plasma electrode plate are respectively connected to the positive electrode and the negative electrode of the V high voltage, and plasma discharge is performed between the plasma electrode rod and the plasma electrode plate to form a high-temperature plasma field;

[0038] Plasma-forming the components discharged from the separated liquid phase delivery pipe to form plasma atomized components;

[0039] S4. Plasma maintenance:

[0040] Under the magnetic field confinement of the plasma magnetic confinement ring, the plasma atomized components pass through the plasma magnetic confinement ring and enter the interior of the stabilizing mechanism tube shell;

[0041] Apply V high voltage electricity between the outer electrode ring and the inner electrode ring to make continuous discharge between the outer electrode ring and the inner electrode ring to form a plasma arc. Under the action of the magnetic field of the permanent magnet ring, the ion arc will rotate at high speed around the axis of the outer electrode ring to form a "plasma curtain wall";

[0042] The magnetic fields of two adjacent permanent magnet rings are in opposite directions, that is, the rotation directions of two adjacent plasma arcs are also opposite;

[0043] When the plasma atomized components pass through the plasma channel, under the action of each "plasma curtain wall", the plasma atomized components can maintain a good plasma state;

[0044] S5, magnetic control acceleration:

[0045] The plasma atomized components passing through the plasma channel enter the magnetron accelerating tube shell, and the accelerating electromagnetic winding generates a strong magnetic field, under the action of the strong magnetic field, the plasma atomized components are continuously accelerated;

[0046] S6. Fluorescence detection:

[0047] The accelerated plasma atomized components then enter the interior of the detection mechanism tube shell, and are irradiated with lasers generated by multiple laser generators to cause the plasma atomized components to produce a fluorescent reaction;

[0048] The fluorescence is reflected by the reflective prism and passes through the optical lens group and then sensed by the fluorescence photoreceptor. The composition and amount of the plasma atomized components are analyzed based on the wavelength and intensity of the received fluorescence.

[0049] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0050] 1. The present invention has a reasonable structural design. First, the separation system of the liquid chromatograph is used to separate the components in the raw material to be detected, and each component is plasma atomized. Under laser irradiation, the plasma atomized component will generate fluorescence of a specific frequency, and the frequency and intensity of the fluorescence are detected, thereby analyzing the composition and amount of each component;

[0051] 2. The present invention is easy to operate. In the plasma stabilizing mechanism, when the plasma atomized components pass through the plasma channel, under the action of each "plasma curtain wall", the plasma atomized components can maintain a plasma state well;

[0052] 3. The magnetron acceleration mechanism of the present invention continuously accelerates the plasma atomized components under the action of a strong magnetic field, so that the plasma atomized components are dispersed more evenly, which is convenient for ensuring the accuracy of subsequent detection results;

[0053] 4. The strong magnetic field generated by the multiple electromagnetic winding coils in the magnetic confinement mechanism of the present invention can control and confine the plasma atomized components to an area near the center of the detection mechanism shell, maintain the overall stability of the plasma atomized components, and help ensure the accuracy of the final detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the overall layout of the present invention;

[0055] Figure 2 It is a schematic diagram of the layout of the plasma atomization mechanism and the back-illuminated detection mechanism of the present invention;

[0056] Figure 3 It is a structural schematic diagram of the plasma atomization mechanism of the present invention;

[0057] Figure 4 yes Figure 3 Right view of;

[0058] Figure 5 It is a structural schematic diagram of the back-illuminated detection mechanism of the present invention;

[0059] Figure 6 yes Figure 5 Left view of

[0060] Figure 7 It is a structural schematic diagram of the plasma stabilization mechanism of the present invention;

[0061] Figure 8 yes Figure 7 Left view of

[0062] Fig. 9 It is a structural schematic diagram of the magnetic control acceleration mechanism of the present invention;

[0063] Fig.10It is a left view of the magnetron accelerating tube shell of the present invention.

[0064] In the figure, 10-liquid chromatograph, 11-liquid chromatographic separation mechanism, 20-plasma atomization mechanism, 21-atomization mechanism shell, 211-atomization mechanism support plate, 22-separation liquid phase delivery pipe, 231-plasma electrode rod, 232-plasma electrode plate, 24-plasma magnetic confinement ring, 30-back-illuminated detection mechanism, 31-detection mechanism shell, 311-prism fixing hole, 312-laser fixing hole, 313-optical component protective housing, 32-reflecting prism, 33-optical lens group, 34-fluorescent photoreceptor, 35-laser generator, 36-magnetic confinement mechanism, 361-magnetic confinement body, 362-electromagnetic winding coil, 40-plasma stabilization mechanism, 400- Plasma channel, 41-stabilizing mechanism shell, 42-electrode support outer ring, 420-outer ring electrode receiving groove, 421-outer electrode ring, 422-magnetic ring receiving ring groove, 423-permanent magnet ring, 43-electrode support inner ring, 430-inner ring electrode receiving groove, 431-inner electrode ring, 432-ion wind guide cone, 44-cooling mechanism, 441-outer ring cooling hole, 442-inner ring cooling hole, 443-cooling input ring, 444-cooling liquid input pipe, 445-cooling output ring, 446-cooling liquid output pipe, 50-magnetic control acceleration mechanism, 51-magnetic control acceleration shell, 52-magnetic control receiving ring shell, 53-accelerating electromagnetic winding, 58-heat dissipation fins, 59-ceramic wafer. DETAILED DESCRIPTION

[0065] Combine the following Figure 1-Figure 10 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of the respective main views or structural schematic diagrams themselves.

[0066] Embodiment 1:

[0067] A chemical raw material detection device and detection method for shield construction area, such as Figure 1 As shown, it includes a liquid chromatograph 10, a plasma atomization mechanism 20 connected to the output end of the liquid chromatograph 10, and a back-illuminated detection mechanism 30 connected to the output end of the plasma atomization mechanism 20;

[0068] The liquid chromatograph 10 has a liquid chromatographic separation mechanism 11 based on a chromatographic column;

[0069] like Figure 3 As shown, the plasma atomization mechanism 20 includes an atomization mechanism shell 21, an atomization mechanism support plate 211 is fixed in the atomization mechanism shell 21, a separation liquid phase delivery pipe 22 is fixed on the atomization mechanism support plate 211, and a plurality of plasma electrode rods 231 are fixed on the atomization mechanism support plate 211 around the separation liquid phase delivery pipe 22;

[0070] The separation liquid phase delivery pipe 22 is connected to the output end of the liquid chromatography separation mechanism 11;

[0071] A plurality of plasma electrode plates 232 are fixed along the radial plane inside the atomizing mechanism tube shell 21;

[0072] A plasma magnetic confinement ring 24 coaxially arranged therewith is fixed inside the atomization mechanism tube shell 21 .

[0073] like Figure 5 As shown, the back-illuminated detection mechanism 30 includes a detection mechanism tube shell 31 placed horizontally, as shown in FIG. Figure 6 As shown, the bottom of the detection mechanism tube shell 31 has a plurality of prism fixing holes 311 connected to the inside thereof, a reflective prism 32 is fixed in the prism fixing hole 311, an optical lens group 33 is fixed at the other end of the reflective prism 32, and a fluorescent photoreceptor 34 is fixed at the other end of the optical lens group 33;

[0074] The side wall of the detection mechanism tube shell 31 has a plurality of laser fixing holes 312 communicating with each other inside and outside, and a laser generator 35 is fixed in the laser fixing holes 312 .

[0075] The interiors of the atomizing mechanism tube shell 21 , the detecting mechanism tube shell 31 , the stabilizing mechanism tube shell 41 and the magnetron accelerating tube shell 51 are all in a vacuum state.

[0076] like Figure 6 As shown, the outer sides of the reflective prism 32 , the optical lens group 33 , and the fluorescent photoreceptor 34 are collectively surrounded by an optical component protection shell 313 , and the optical component protection shell 313 is fixedly connected to the detection mechanism tube shell 31 .

[0077] The optical component protective housing can provide good protection for the reflective prism, optical lens group and fluorescent photoreceptor inside the optical component.

[0078] like Figure 2 As shown, a plasma stabilization mechanism 40 is connected between the plasma atomization mechanism 20 and the back-illuminated detection mechanism 30. Figure 7 As shown, the plasma stabilizing mechanism 40 includes a stabilizing mechanism tube shell 41 connected to the atomizing mechanism tube shell 21, an electrode support outer ring 42 coaxial with the stabilizing mechanism tube shell 41 is fixed to the inner side wall thereof, and an electrode support inner ring 43 coaxial with the electrode support outer ring 42 is fixed inside the electrode support outer ring 42;

[0079] An annular plasma channel 400 is formed between the inner side of the electrode support outer ring 42 and the electrode support inner ring 43;

[0080] The inner wall of the electrode support outer ring 42 is provided with a plurality of outer ring electrode receiving grooves 420, in which an outer electrode ring 421 is fixed, and the outer side of the electrode support inner ring 43 is provided with a plurality of inner ring electrode receiving grooves 430, in which an inner electrode ring 431 is fixed;

[0081] The electrode supporting outer ring 42 has a plurality of coaxial magnetic ring accommodating grooves 422 inside, and a permanent magnetic ring 423 is fixed in the magnetic ring accommodating grooves 422;

[0082] The distance between two adjacent outer electrode rings 421 is 200% of the distance between the plasma channels 400;

[0083] Ion wind guide cones 432 are fixed at both ends of the electrode support inner ring 43 .

[0084] like Figure 8 As shown, a cooling mechanism 44 is provided in the plasma stabilizing mechanism 40, and the cooling mechanism 44 includes a plurality of outer ring cooling holes 441 provided in the electrode supporting outer ring 42, and a plurality of inner ring cooling holes 442 provided in the electrode supporting inner ring 43, and the outer ring cooling holes 441 and the inner ring cooling holes 442 both extend along an axis parallel to the stabilizing mechanism tube shell 41;

[0085] like Figure 7 As shown, a hollow cooling input ring 443 is fixed to the outside of the stabilizing mechanism tube shell 41, and a cooling liquid input pipe 444 connected to the inside of the cooling input ring 443 is fixed thereon; a hollow cooling output ring 445 is fixed to the outside of the stabilizing mechanism tube shell 41, and a cooling liquid output pipe 446 connected to the inside of the cooling output ring 445 is fixed thereon;

[0086] The coolant input pipe 444 is connected to the output end of the circulation delivery pump, and the coolant output pipe 446 is connected to the input end of the circulation delivery pump;

[0087] The cooling input ring 443 is connected to one end of each outer ring cooling hole 441 and the inner ring cooling hole 442 , and the cooling output ring 445 is connected to the other end of each outer ring cooling hole 441 and the inner ring cooling hole 442 .

[0088] like Figure 2 As shown, a magnetic control acceleration mechanism 50 is connected between the plasma stabilization mechanism 40 and the back-illuminated detection mechanism 30. Fig. 9 As shown, the magnetron acceleration mechanism 50 includes a magnetron acceleration tube shell 51 connected to the stabilization mechanism tube shell 41, and the other end of the magnetron acceleration tube shell 51 is connected to the detection mechanism tube shell 31. A hollow magnetron containing ring shell 52 is fixed to the outside of the magnetron acceleration tube shell 51, and multiple groups of coaxially arranged accelerating electromagnetic windings 53 are fixed inside the magnetron containing ring shell 52.

[0089] A plurality of ceramic wafers 59 arranged along a radial plane are fixed inside the magnetron acceleration mechanism 50 .

[0090] A plurality of heat dissipation fins 58 are fixed to the outer end of the magnetron acceleration mechanism 50 .

[0091] Embodiment 2:

[0092] The difference from the first embodiment is that the distance between two adjacent outer electrode rings 421 is 150% of the distance between the plasma channels 400 .

[0093] Embodiment 3:

[0094] The difference from the first embodiment is that the distance between two adjacent outer electrode rings 421 is 180% of the distance between the plasma channels 400 .

[0095] Embodiment 4:

[0096] On the basis of Example 3, a magnetic constraint mechanism 36 is provided on the outside of the detection mechanism tube shell 31. The magnetic constraint mechanism 36 includes a plurality of magnetic constraint bodies 361 fixed on the outside of the detection mechanism tube shell 31. The magnetic constraint bodies 361 extend in a direction parallel to the axis of the detection mechanism tube shell 31. The magnetic constraint bodies 361 have a plurality of electromagnetic winding coils 362.

[0097] Embodiment 5:

[0098] This embodiment describes a method for detecting chemical raw materials in a shield construction area, and a device for detecting chemical raw materials in a shield construction area based on the above-mentioned embodiment 4, comprising the following steps:

[0099] S1. Prepare raw material solution:

[0100] The raw material to be tested is prepared into a solution with a mass concentration of 50%;

[0101] S2. Separation by chromatography:

[0102] The prepared raw material solution is input into the chromatographic column of the liquid chromatography separation mechanism 11, and the components in the raw material solution are separated under the separation and migration action of the mobile phase, and the components are discharged from the output end of the chromatographic column in sequence;

[0103] S3, plasma atomization:

[0104] The components discharged from the output end of the chromatographic column are transported to the separation liquid phase transport pipe 22, and the plasma electrode rod 231 and the plasma electrode plate 232 are respectively connected to the positive and negative electrodes of the 380V high voltage electricity, and plasma discharge is performed between the plasma electrode rod 231 and the plasma electrode plate 232 to form a high-temperature plasma field;

[0105] Plasma-forming the components discharged from the separated liquid phase delivery pipe 22 to form plasma atomized components;

[0106] S4. Plasma maintenance:

[0107] Under the magnetic field confinement of the plasma magnetic confinement ring 24, the plasma atomized components pass through the plasma magnetic confinement ring 24 and enter the interior of the stabilizing mechanism tube shell 41;

[0108] A 380V high voltage is applied between the outer electrode ring 421 and the inner electrode ring 431 to cause continuous discharge between the outer electrode ring 421 and the inner electrode ring 431 to form a plasma arc. Under the magnetic field of the permanent magnet ring 423, the ion arc will rotate at high speed around the axis of the outer electrode ring 421 to form a "plasma curtain wall";

[0109] The magnetic fields of two adjacent permanent magnet rings 423 are in opposite directions, that is, the rotation directions of two adjacent plasma arcs are also in opposite directions;

[0110] When the plasma atomized components pass through the plasma channel 400, under the action of each "plasma curtain wall", the plasma atomized components can maintain a plasma state well;

[0111] S5, magnetic control acceleration:

[0112] The plasma atomized components passing through the plasma channel 400 enter the magnetron accelerating tube shell 51, and the accelerating electromagnetic winding 53 generates a strong magnetic field, under the action of the strong magnetic field, the plasma atomized components are continuously accelerated;

[0113] S6. Fluorescence detection:

[0114] The accelerated plasma atomized components then enter the interior of the detection mechanism tube shell 31, and are irradiated with lasers generated by multiple laser generators 35, causing the plasma atomized components to produce a fluorescent reaction;

[0115] The fluorescence is reflected by the reflective prism 32 and passes through the optical lens set 33 before being sensed by the fluorescence photoreceptor 34 . The composition and amount of the plasma atomized component are analyzed based on the wavelength and intensity of the received fluorescence.

[0116] Embodiment 6:

[0117] The difference from Example 5 is that in step S1, the raw material to be detected is prepared into a solution with a mass concentration of 20%.

[0118] Embodiment 7:

[0119] The difference from Example 5 is that in step S1, the raw material to be detected is prepared into a solution with a mass concentration of 35%.

Claims

1. A chemical raw material detection device for shield construction area, characterized in that: It comprises a liquid chromatograph (10), a plasma atomization mechanism (20) connected to the output end of the liquid chromatograph (10), and a back-illuminated detection mechanism (30) connected to the output end of the plasma atomization mechanism (20); The liquid chromatograph (10) has a liquid chromatographic separation mechanism (11) based on a chromatographic column; The plasma atomization mechanism (20) is provided with a separation liquid phase delivery pipe (22) connected to the output end of the liquid chromatography separation mechanism (11), a plurality of plasma electrode rods (231) are provided around the separation liquid phase delivery pipe (22), and a plurality of plasma electrode plates (232) are also provided inside the plasma atomization mechanism (20); The back-illuminated detection mechanism (30) comprises a horizontally placed detection mechanism tube shell (31), a plurality of reflection prisms (32) located at the bottom of the detection mechanism tube shell (31), an optical lens group (33) fixed to the open end of the reflection prism (32), a fluorescent photoreceptor (34) connected to the outer end of the optical lens group (33), and a plurality of laser generators (35) arranged on the side wall of the detection mechanism tube shell (31); A magnetic confinement mechanism (36) is provided on the outside of the detection mechanism tube shell (31), and the magnetic confinement mechanism (36) comprises a plurality of magnetic confinement bodies (361) fixed on the outside of the detection mechanism tube shell (31), and the magnetic confinement bodies (361) extend in a direction parallel to the axis of the detection mechanism tube shell (31), and the magnetic confinement bodies (361) have a plurality of electromagnetic winding coils (362) inside; A plasma stabilizing mechanism (40) is connected between the plasma atomizing mechanism (20) and the back-illuminated detection mechanism (30), and the plasma stabilizing mechanism (40) comprises a stabilizing mechanism tube shell (41) connected to the atomizing mechanism tube shell (21), an electrode support outer ring (42) coaxial with the atomizing mechanism tube shell (21) is fixed to the inner side wall of the stabilizing mechanism tube shell (41), and an electrode support inner ring (43) coaxial with the electrode support outer ring (42) is fixed inside the electrode support outer ring (42); An annular plasma channel (400) is formed between the inner side of the electrode support outer ring (42) and the electrode support inner ring (43); A plurality of outer electrode rings (421) are fixed on the inner side wall of the electrode support outer ring (42), and a plurality of inner electrode rings (431) are fixed on the outer side of the electrode support inner ring (43); A plurality of permanent magnet rings (423) are arranged inside the electrode supporting outer ring (42); Ion wind guide cones (432) are fixed at both ends of the electrode support inner ring (43); A magnetron acceleration mechanism (50) is provided between the plasma stabilization mechanism (40) and the back-illuminated detection mechanism (30), the magnetron acceleration mechanism (50) comprising a magnetron acceleration tube shell (51) connected to the stabilization mechanism tube shell (41), the other end of the magnetron acceleration tube shell (51) being connected to the detection mechanism tube shell (31), a hollow magnetron containing ring shell (52) being fixed on the outside of the magnetron acceleration tube shell (51), and a plurality of groups of coaxially arranged accelerating electromagnetic windings (53) being fixed inside the magnetron containing ring shell (52).

2. The chemical raw material detection equipment for shield construction area according to claim 1 is characterized in that: A plasma magnetic confinement ring (24) is provided inside the plasma atomization mechanism (20).

3. The chemical raw material detection equipment for shield construction area according to claim 1 is characterized in that: A cooling mechanism (44) is provided in the plasma stabilizing mechanism (40), the cooling mechanism (44) comprising a plurality of outer ring cooling holes (441) arranged in the electrode supporting outer ring (42), and a plurality of inner ring cooling holes (442) arranged in the electrode supporting inner ring (43), the outer ring cooling holes (441) and the inner ring cooling holes (442) both extending along an axis parallel to the stabilizing mechanism tube shell (41); The stabilizing mechanism tube shell (41) is connected to a cooling liquid input pipe (444) and a cooling liquid output pipe (446); The cooling input ring (443) is connected to one end of each of the outer ring cooling holes (441) and the inner ring cooling holes (442), and the cooling output ring (445) is connected to the other end of each of the outer ring cooling holes (441) and the inner ring cooling holes (442).

4. The chemical raw material detection equipment for shield construction area according to claim 1 is characterized in that: A plurality of ceramic wafers (59) arranged along a radial plane are fixed inside the magnetron acceleration mechanism (50).

5. The chemical raw material detection equipment for shield construction area according to claim 1 is characterized in that: A plurality of heat dissipation fins (58) are fixed to the outer end of the magnetron acceleration mechanism (50).

6. The method for detecting chemical raw materials by using chemical raw material detection equipment in a shield construction area according to claim 1, characterized in that: The following steps are involved: S1. Prepare raw material solution: The raw material to be tested is prepared into a solution with a mass concentration of 20 to 50%; S2. Separation by chromatography: The prepared raw material solution is input into the chromatographic column of the liquid chromatography separation mechanism (11), and the components in the raw material solution are separated under the separation migration action of the mobile phase, and the components are discharged from the output end of the chromatographic column in sequence; S3, plasma atomization: The components discharged from the output end of the chromatographic column are transported to the separation liquid phase transport pipe (22), the plasma electrode rod (231) and the plasma electrode plate (232) are respectively connected to the positive electrode and the negative electrode of the 380V high voltage electricity, and plasma discharge is performed between the plasma electrode rod (231) and the plasma electrode plate (232) to form a high-temperature plasma field; Plasma-forming the components discharged from the separated liquid phase delivery pipe (22) to form plasma atomized components; S4. Plasma maintenance: Under the confinement of the magnetic field of the plasma magnetic confinement ring (24), the plasma atomized component passes through the plasma magnetic confinement ring (24) and enters the interior of the stabilizing mechanism tube shell (41); A 380V high voltage is applied between the outer electrode ring (421) and the inner electrode ring (431), so that a plasma arc is continuously discharged between the outer electrode ring (421) and the inner electrode ring (431). Under the action of the magnetic field of the permanent magnet ring (423), the ion arc rotates at a high speed around the axis of the outer electrode ring (421), forming a "plasma curtain wall"; The magnetic fields of two adjacent permanent magnet rings (423) are in opposite directions, that is, the rotation directions of two adjacent plasma arcs are also in opposite directions; When the plasma atomized components pass through the plasma channel (400), under the action of each "plasma curtain wall", the plasma atomized components can maintain a good plasma state; S5, magnetic control acceleration: The plasma atomized components passing through the plasma channel (400) enter the magnetron accelerating tube shell (51), and the accelerating electromagnetic winding (53) generates a strong magnetic field, under the action of the strong magnetic field, the plasma atomized components are continuously accelerated; S6. Fluorescence detection: The accelerated plasma atomized components then enter the interior of the detection mechanism tube shell (31), and are irradiated with lasers generated by a plurality of laser generators (35), causing the plasma atomized components to produce a fluorescent reaction; The fluorescence is reflected by the reflection prism (32) and passes through the optical lens group (33) and then sensed by the fluorescence photoreceptor (34). The composition and amount of the plasma atomized component are analyzed based on the wavelength and intensity of the received fluorescence.

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