Actuating mechanism for oxygen-nitrogen-hydrogen analyzer

Abstract

The invention provides an executing mechanism for an oxygen-nitrogen-hydrogen analyzer. The executing mechanism comprises a sample injection structure, a pulse heating structure and a cleaning structure, the pulse heating structure comprises an upper furnace body and a lower furnace body, an upper electrode is arranged in the upper furnace body, a heating cavity is formed in the lower part of the upper electrode, and a first sample introduction channel communicated with the heating cavity is formed in the top of the upper electrode; a lower electrode is arranged on the lower furnace body, a crucible seat is arranged on the lower electrode, and a graphite crucible is arranged on the crucible seat; the lower furnace body is connected with a lifting cylinder which drives the lower furnace body to move; the sample introduction structure is arranged at the top of the upper furnace body to realize sealed sample introduction; the cleaning structure is arranged on one side of the pulse heating structure and automatically cleans the electrode. The sample introduction structure, the pulse heating structure and the cleaning structure are reasonably arranged, the sample introduction sliding plate of the sample introduction structure is provided with the sample introduction groove, the transparent window and the perspective sealing piece, sealed sample introduction is guaranteed, and real-time observation of the sample combustion process is achieved; and the cleaning structure realizes automatic cleaning of the electrode.

Description

Technical Field

[0001] The present invention belongs to the technical field of oxygen, nitrogen and hydrogen analyzers, and in particular relates to an actuator for an oxygen, nitrogen and hydrogen analyzer. Background Art

[0002] Oxygen and nitrogen are the most important elements affecting the quality of alloy products. Oxygen, nitrogen, and hydrogen content in alloys is usually detected and analyzed using an oxygen, nitrogen, and hydrogen analyzer. This process includes: sample decomposition: Under inert gas protection, the sample is heated in a pulse electrode furnace, causing it to melt and decompose at high temperature; gas conversion: oxygen in the sample reacts with carbon in a graphite crucible to produce carbon monoxide (CO), while nitrogen and hydrogen escape as nitrogen (N2) and hydrogen (H2), respectively; carbon monoxide (CO) is converted to carbon dioxide (CO2), and an inert carrier gas transports the converted mixed gas; detection and analysis: the mixed gas first enters an infrared detection system, where the carbon dioxide (CO2) content is detected using infrared absorption, thereby determining the oxygen content in the sample; then, after removing components such as carbon dioxide (CO2), the mixed gas containing nitrogen (N2) and hydrogen (H2) is sent to a thermal conductivity detector, where the nitrogen and hydrogen contents are determined based on the difference in gas thermal conductivity.

[0003] An oxygen, nitrogen, and hydrogen analyzer includes an actuator and a detection and analysis mechanism. The actuator comprises at least a sample introduction mechanism and a pulse heating mechanism. Existing actuators suffer from issues such as insufficient sealing, the inability to observe sample heating in real time, and cumbersome installation. Furthermore, the pulse heating electrodes in the pulse heating mechanism require manual cleaning after each test, resulting in inefficient and incomplete cleaning, which can affect test results. Therefore, it is necessary to provide an actuator for an oxygen, nitrogen, and hydrogen analyzer that can address, or at least partially resolve, these issues. Summary of the Invention

[0004] The present invention provides an actuator for an oxygen, nitrogen and hydrogen analyzer, which optimizes the structure, improves the sealing performance, realizes real-time observation of sample heating conditions, and realizes automatic cleaning of electrodes.

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

[0006] An actuator for an oxygen, nitrogen and hydrogen analyzer, comprising a sample introduction structure, a pulse heating structure and a cleaning structure;

[0007] The pulse heating structure includes an upper furnace body and a lower furnace body that are correspondingly arranged. An upper electrode is sealed in the upper furnace body, a heating chamber is provided at the lower part of the upper electrode, and a first sample inlet channel connected to the heating chamber is vertically penetrated at the top of the upper electrode; a lower electrode is provided at the top of the lower furnace body, a crucible seat is provided at the top of the lower electrode, and a graphite crucible is provided on the crucible seat; the lower furnace body is connected to a lifting cylinder, and the lifting cylinder drives the lower furnace body to move up and down;

[0008] The sampling structure is arranged at the top of the upper furnace body, and includes a sampling body, a second sampling channel is vertically penetrated in the sampling body, and the second sampling channel is connected to the first sampling channel. The sampling body is provided with an injection rod, and the injection rod is connected to a first push rod cylinder, and the first push rod cylinder drives the injection rod to enter or exit the second sampling channel; the sampling body is provided with an inert carrier gas delivery pipe connected to the second sampling channel;

[0009] An injection slide is provided above the injection body, a funnel-shaped injection groove is provided at the front of the injection slide, a transparent window is provided at the rear of the injection slide, and a transparent sealing member is provided at the transparent window; the injection slide is connected to a second push rod cylinder, which drives the injection slide to move back and forth to switch between the injection position and the observation position; when the injection slide is in the injection position, the injection groove is connected to the second injection channel; when the injection slide is in the observation position, the transparent sealing member is located directly above the second injection channel;

[0010] During detection, the sampling rod enters the second sampling channel, and the second push rod cylinder drives the sampling slide to the sampling position, and the sample falls into the second sampling channel through the sampling slot, and the sampling rod prevents the sample from entering the first sampling channel; the second push rod cylinder drives the sampling slide to the observation position; the lifting cylinder drives the lower furnace body to move upward, and the graphite crucible enters the heating chamber and is connected to the first sampling channel; the lower electrode is in sealed contact with the upper electrode; the inert carrier gas delivery pipe introduces inert carrier gas to exhaust the air in the heating chamber; the first push rod cylinder drives the sampling rod to exit the second sampling channel, and the sample falls into the graphite crucible; the upper electrode and the lower electrode heat the graphite crucible and the sample; the sample combustion condition is observed through the transparent window and the perspective seal. After the detection is completed, the lifting cylinder drives the lower furnace body to move downward, and the graphite crucible leaves the heating chamber;

[0011] The cleaning structure is arranged on one side of the pulse heating structure. After the detection is completed, the graphite crucible is removed, and the cleaning structure drives the cleaning brush to move into the heating chamber and rotate to clean the inner wall of the heating chamber.

[0012] Preferably, the cleaning structure includes a transverse cylinder, a vertical cylinder, a drive unit and a cleaning brush; the cleaning brush is connected to the drive unit, the drive unit is installed on the vertical cylinder, and the vertical cylinder is connected to the transverse cylinder; the transverse cylinder moves to drive the cleaning brush to move to the bottom of the lower electrode, the vertical cylinder moves upward, driving the cleaning brush to move into the heating chamber, and the drive unit drives the cleaning brush to rotate and clean the inner wall of the heating chamber.

[0013] Preferably, the driving unit includes a driving mounting frame, a driving motor, a first driving wheel, a second driving wheel and a driving belt; the driving motor is arranged in the driving mounting frame, the driving motor is connected to the first driving wheel, and the driving belt is connected to the first driving wheel and the second driving wheel; the cleaning brush is connected to the second driving wheel, and the driving motor rotates through the first driving wheel, the driving belt and the second driving wheel to drive the cleaning brush to rotate.

[0014] Preferably, the upper furnace body is provided with a mixed gas delivery pipe communicating with the heating chamber.

[0015] Preferably, a mounting seat is provided below the lower furnace body, and the lifting cylinder is connected to the mounting seat to drive the mounting seat and the lower furnace body to move; a guide seat is provided outside the lower furnace body to guide the lower furnace body when it moves.

[0016] Preferably, a first sealing groove is provided on the connection surface between the outer wall of the upper electrode and the upper furnace body, and a first sealing ring is provided in the first sealing groove.

[0017] Preferably, an injection mounting plate is provided at the bottom of the injection body, and an injection hole communicating with the second injection channel is provided through the injection mounting plate.

[0018] Preferably, a second sealing groove is provided on the bottom surface of the injection body, the second sealing groove is located on the outer periphery of the second injection channel, and a second sealing ring is provided in the second sealing groove; a third sealing groove is provided on the top surface of the upper furnace body, and a third sealing ring is provided in the third sealing groove.

[0019] Preferably, a through perspective groove is provided at the rear of the sample injection slide, and the transparent window is provided at the top of the through perspective groove; the perspective seal is provided in the through perspective groove, and the perspective seal is provided with a through perspective channel corresponding to the transparent window, and a perspective mirror is sealed in the perspective channel; a fourth sealing groove is provided on the outer periphery of the perspective seal, and a fourth sealing ring is provided in the fourth sealing groove; a fifth sealing groove is provided on the bottom edge of the perspective seal, and a fifth sealing ring is provided in the fifth sealing groove.

[0020] Preferably, a dust collection device is provided on one side of the upper furnace body.

[0021] Compared with the prior art, the technical solution of the present invention has beneficial effects.

[0022] For example, the actuator used in the oxygen, nitrogen and hydrogen analyzer rationally deploys the sampling structure, pulse heating structure and cleaning structure, making the sampling, heating detection and electrode cleaning processes more reasonable. A sampling slot, a transparent window and a perspective seal are set on the sampling slide; the sampling position and the observation position are switched by the second push rod cylinder to ensure the sealing of the sampling channel while realizing real-time observation of the sample combustion process; a cleaning structure is set to realize automatic cleaning of the electrode after the detection is completed, thereby improving the cleaning effect and cleaning efficiency.

[0023] Furthermore, multiple sealing structures are provided at the connection points of the multiple components of the pulse heating structure and the connection points of the multiple components of the sampling structure to improve the sealing effect and enhance the detection accuracy.

[0024] Furthermore, a perspective channel is provided in the perspective sealing member, and a perspective mirror is provided in the perspective channel, so as to further enhance the effect of real-time observation of the sample combustion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of an actuator for an oxygen, nitrogen and hydrogen analyzer in an embodiment of the present invention;

[0026] Figure 2 is a side sectional view of an actuator for an oxygen, nitrogen and hydrogen analyzer in an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the sample injection structure in an embodiment of the present invention;

[0028] Figure 4 is a side sectional view of the sample injection structure in an embodiment of the present invention;

[0029] Figure 5 is an exploded view of the sample injection structure in an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the front end portion of the sample injection structure in an embodiment of the present invention after being cut away.

[0031] Description of reference numerals:

[0032] 1- Mounting bracket;

[0033] 2-injection structure; 21-injection body; 211-second injection channel; 212-injection rod; 213-first push rod cylinder; 214-inert carrier gas delivery tube; 215-second sealing ring; 216-fixing groove; 22-injection slide; 221-injection slot; 222-transparent window; 223-second push rod cylinder; 224-perspective slot; 23-injection mounting plate; 231-connecting slot; 232-rotating shaft; 233-bolt; 24-perspective seal; 241-perspective channel; 242-perspective mirror; 243-fourth sealing ring; 244-fifth sealing ring; 25-dust cover;

[0034] 3- pulse heating structure; 31- upper furnace body; 311- mixed gas delivery pipe; 312- third sealing ring; 32- lower furnace body; 33- upper electrode; 331- heating chamber; 332- first sample inlet channel; 333- first sealing ring; 34- lower electrode; 35- crucible holder; 36- graphite crucible; 37- lifting cylinder; 38- mounting seat; 39- guide seat;

[0035] 4-cleaning structure; 41-cleaning brush; 42-transverse cylinder; 43-vertical cylinder; 44-drive unit; 441-drive mounting frame; 442-drive motor; 443-drive mounting plate; 45-cleaning head. DETAILED DESCRIPTION

[0036] To make the objectives, features, and beneficial effects of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described below are merely illustrative of the present invention and are not intended to limit the present invention. Furthermore, the same or similar reference numerals may be used in the drawings to refer to the same or similar elements in different embodiments, and descriptions of the same or similar elements in different embodiments, as well as descriptions of prior art elements, features, and effects, may be omitted.

[0037] Figure 1 Schematic diagram of an actuator for an oxygen, nitrogen and hydrogen analyzer in an embodiment of the present invention; Figure 2 is a side sectional view of an actuator for an oxygen, nitrogen and hydrogen analyzer in an embodiment of the present invention; Figure 3 Schematic diagram of the sample injection structure in an embodiment of the present invention; Figure 4 is a side sectional view of the sample injection structure in an embodiment of the present invention; Figure 5 is an exploded view of the sample injection structure in an embodiment of the present invention; Figure 6 It is a schematic diagram of the front end portion of the sample injection structure in an embodiment of the present invention after being cut away.

[0038] Reference Figures 1-6 , an embodiment of the present invention provides an actuator for an oxygen, nitrogen and hydrogen analyzer.

[0039] Specifically, the actuator for the oxygen, nitrogen and hydrogen analyzer includes a sample introduction structure 2, a pulse heating structure 3 and a cleaning structure 4;

[0040] The pulse heating structure 3 includes an upper furnace body 31 and a lower furnace body 32, each of which is provided with an upper electrode 33 sealed in the upper furnace body 31. A heating chamber 331 is provided at the lower portion of the upper electrode 33, and a first sample inlet channel 332 is vertically provided on the top of the upper electrode 33, which is connected to the heating chamber 331. A lower electrode 34 is provided on the top of the lower furnace body 32, and a crucible seat 35 is provided on the top of the lower electrode 34. A graphite crucible 36 is provided on the crucible seat 35. The lower furnace body 32 is connected to a lifting cylinder 37, which drives the lower furnace body 32 to move up and down.

[0041] The sampling structure 2 is arranged at the top of the upper furnace body 31 and includes a sampling body 21. A second sampling channel 211 is vertically provided through the sampling body 21. The second sampling channel 211 is connected to the first sampling channel 332. An injection rod 212 is provided in the sampling body 21. The injection rod 212 is connected to a first push rod cylinder 213. The first push rod cylinder 213 drives the injection rod 212 to enter or exit the second sampling channel 211. The sampling body 21 is provided with an inert carrier gas delivery pipe 214 connected to the second sampling channel 211.

[0042] An injection slide 22 is provided above the injection body 21. A funnel-shaped injection groove 221 is provided at the front of the injection slide 22. A transparent window 222 is provided at the rear of the injection slide 22. A transparent seal 24 is provided at the transparent window 222. The injection slide 22 is connected to a second push rod cylinder 223. The second push rod cylinder 223 drives the injection slide 22 to move back and forth to switch between the injection position and the observation position. When the injection slide 22 is in the injection position, the injection groove 221 is connected to the second injection channel 211. When the injection slide 22 is in the observation position, the transparent seal 24 is located directly above the second injection channel 211.

[0043] During detection, the injection rod 212 enters the second injection channel 211, and the second push rod cylinder 223 drives the injection slide 22 to move to the injection position. The sample falls into the second injection channel 211 through the injection slot 221, and the injection rod 212 prevents the sample from entering the first injection channel 332; the second push rod cylinder 223 drives the injection slide 22 to move to the observation position; the lifting cylinder 37 drives the lower furnace body 32 to move upward, and the graphite crucible 36 enters the heating chamber 331 and is connected to the first injection channel 332; the lower electrode 34 is connected to the upper electrode The upper electrode 33 is in sealed contact with the lower electrode 33; the inert carrier gas delivery pipe 214 is used to introduce inert carrier gas to exhaust the air in the heating chamber 331; the first push rod cylinder 213 drives the injection rod 212 to exit the second injection channel 211, and the sample falls into the graphite crucible 36; the upper electrode 33 and the lower electrode 34 heat the graphite crucible 36 and the sample; the sample combustion status is observed through the transparent window 222 and the transparent seal 24. After the detection is completed, the lifting cylinder 37 drives the lower furnace body 32 to move downward, and the graphite crucible 36 leaves the heating chamber 311;

[0044] The cleaning structure 4 is arranged on one side of the pulse heating structure 3 . After the inspection is completed, the graphite crucible 36 is removed, and the cleaning structure 4 drives the cleaning brush 41 to move into the heating chamber 331 and rotate to clean the inner wall of the heating chamber 331 .

[0045] Specifically, it further includes a mounting bracket 1 , an upper furnace body 31 is arranged on the upper part of the mounting bracket 1 , and a lower furnace body 32 is correspondingly arranged on the lower part of the mounting bracket 1 .

[0046] In some embodiments, the cleaning structure 4 includes a transverse cylinder 42, a vertical cylinder 43, a drive unit 44 and a cleaning brush 41; the cleaning brush 41 is connected to the drive unit 44, the drive unit 44 is installed on the vertical cylinder 43, and the vertical cylinder 43 is connected to the transverse cylinder 42; the transverse cylinder 42 moves to drive the cleaning brush 41 to move to the bottom of the lower electrode 34, the vertical cylinder 43 moves upward, driving the cleaning brush 41 to move to the heating chamber 331, and the drive unit 44 drives the cleaning brush 41 to rotate to clean the inner wall of the heating chamber 331.

[0047] Specifically, the transverse cylinder 42 is provided with a first sensor (not shown) for detecting the position of the transverse cylinder 42. When the first sensor detects that the transverse cylinder 42 is extended, the cleaning brush 41 is located above the lower electrode 34, and the lifting cylinder 37 is prohibited from rising at this time; the lifting cylinder 37 is provided with a second sensor (not shown) for detecting the position of the lifting cylinder 37. When the second sensor detects that the lifting cylinder 37 is extended to the raised position, the transverse cylinder 42 is prohibited from extending.

[0048] In some embodiments, a dust collecting device 313 is provided on one side of the upper furnace body 31 , and the dust collecting device 313 absorbs the generated dust when the cleaning brush 41 rotates to clean the inner wall of the heating chamber 331 .

[0049] In some embodiments, the drive unit 44 includes a drive mounting frame 441, a drive motor 442, a first drive wheel (not shown), a second drive wheel (not shown) and a drive belt (not shown); the drive motor 442 is arranged in the drive mounting frame 441, the drive motor 442 is connected to the first drive wheel, and the drive belt 443 is connected to the first drive wheel and the second drive wheel; the cleaning brush 41 is connected to the second drive wheel, and the drive motor 442 rotates through the first drive wheel, the drive belt 443 and the second drive wheel to drive the cleaning brush 41 to rotate.

[0050] Specifically, a drive mounting plate 443 is provided on the top of the drive mounting frame 441, and the first drive wheel, the second drive wheel and the drive belt are installed on the drive mounting plate 443. A cleaning head 45 is provided below the end of the drive mounting plate 443 close to the pulse heating structure 3. When the transverse cylinder 42 moves, the cleaning head 45 contacts the crucible seat 35 to clean the crucible seat 35.

[0051] In some embodiments, the upper furnace body 31 is provided with a mixed gas delivery pipe 311 connected to the heating chamber 331 for delivering the mixed gas generated after the sample is heated in the graphite crucible 36 .

[0052] In some embodiments, a mounting seat 38 is provided below the lower furnace body 32, and a lifting cylinder 37 is connected to the mounting seat 38 to drive the mounting seat 38 and the lower furnace body 32 to move; a guide seat 39 is provided on the outside of the lower furnace body 32 to guide the lower furnace body 32 when it moves.

[0053] In some embodiments, a first sealing groove is provided on the connection surface between the outer wall of the upper electrode 33 and the upper furnace body 31 , and a first sealing ring 333 is provided in the first sealing groove to improve the sealing effect of the connection between the upper electrode 33 and the upper furnace body 31 .

[0054] In some embodiments, a sample injection mounting plate 23 is provided at the bottom of the sample injection body 21 , and a sample injection hole 23 communicating with the second sample injection channel 211 is provided through the sample injection mounting plate 23 .

[0055] Specifically, a connecting groove 231 is provided at the front end of the sample injection mounting plate 23, and a rotating shaft 232 is rotatably provided in the connecting groove 231. A threaded hole is provided at the rotating shaft 232 corresponding to the connecting groove 231, and a bolt 233 is screwed into the threaded hole. The sample injection body 21 is provided with a fixing groove 216 corresponding to the connecting groove 231. When the sample injection body 21 is placed on the sample injection mounting plate 23, the bolt 233 is moved and placed in the fixing groove 216. The sample injection body 21 is fixed by tightening the bolt 233. When installing or disassembling the sample injection body 21, there is no need to completely remove the bolt 233 at the front end of the sample injection mounting plate 23, and there is no need to align the bolt 233 and the bolt hole, thereby simplifying the fixing operation.

[0056] Specifically, the rear end of the injection body 21 is fixed to the injection mounting plate 23 by bolts screwed into the injection mounting plate 23 .

[0057] In some embodiments, a second sealing groove is provided on the bottom surface of the sampling body 21, the second sealing groove is located on the outer periphery of the second sampling channel 211, and a second sealing ring 215 is provided in the second sealing groove; a third sealing groove is provided on the top surface of the upper furnace body 31, and a third sealing ring 312 is provided in the third sealing groove to improve the sealing effect of the connection between the sampling structure 2 and the upper furnace body 31.

[0058] In some embodiments, a through perspective groove 224 is provided at the rear portion of the injection slide 22, and a transparent window 222 is provided at the top of the through perspective groove 224; a perspective seal 24 is provided in the through perspective groove 224, and the perspective seal 24 is provided with a through perspective channel 241 corresponding to the transparent window 222, and a perspective mirror 242 is sealed in the perspective channel 241; a fourth sealing groove is provided on the outer periphery of the perspective seal 24, and a fourth sealing ring 243 is provided in the fourth sealing groove; a fifth sealing groove is provided on the bottom edge of the perspective seal 24, and a fifth sealing ring 244 is provided in the fifth sealing groove; when the injection slide 22 is in the observation position, the fifth sealing ring 244 is located on the outer periphery of the second injection channel 211, thereby improving the sealing effect at the second injection channel 211.

[0059] Specifically, the perspective mirror 242 is a magnifying glass. When the sample feeding slide 22 is located at the observation position, the sample combustion condition can be observed in real time through the transparent window 222 and the perspective mirror 242 .

[0060] Specifically, a reflector (not shown) with an adjustable angle is provided above the sample feeding structure 2 , and the scene of the transparent window 222 and the perspective mirror 242 is obtained through the reflector to observe the sample combustion situation in real time.

[0061] Specifically, the edges on both sides of the bottom of the sample injection slide 22 are provided with slide grooves, and the top edge of the sample injection body 21 is provided with slide rails matching the slide grooves. The sample injection slide 22 and the sample injection body 21 are slidably connected through the slide rails and the slide grooves.

[0062] Specifically, a dust cover 25 is provided at the sample injection slot 221 of the sample injection slide 22 to seal the sample injection slot 221 .

[0063] In summary, the actuator for the oxygen, nitrogen and hydrogen analyzer provided by the present invention rationally deploys the sampling structure 2, the pulse heating structure 3 and the cleaning structure 4, so that the processes of sampling, heating detection and electrode cleaning are more reasonable, and a sampling slot 221, a transparent window 222 and a transparent seal 24 are set on the sampling slide 22; the switching of the sampling position and the observation position is realized by the second push rod cylinder 223, while ensuring the sealing of the sampling channel, realizing real-time observation of the sample combustion process; after the detection is completed, the cleaning structure 4 is used to realize automatic cleaning of the electrode, thereby improving the cleaning effect and cleaning efficiency.

[0064] Furthermore, multiple sealing structures are provided at the connection points of the multiple components of the pulse heating structure 3 and the connection points of the multiple components of the sample injection structure 2 to improve the sealing effect and enhance the detection accuracy.

[0065] Furthermore, a perspective channel 241 is provided in the perspective sealing member 24 , and a perspective mirror 242 is provided in the perspective channel 241 , so as to further enhance the effect of real-time observation of the sample combustion process.

[0066] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative, not limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, based on actual needs and where technically feasible, and may be derived from the technical features of the corresponding independent claim in any appropriate manner rather than solely through the specific combinations listed in the claims.

[0067] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. An actuator for an oxygen, nitrogen and hydrogen analyzer, characterized in that: It includes a sample injection structure, a pulse heating structure and a cleaning structure; The pulse heating structure includes an upper furnace body and a lower furnace body that are correspondingly arranged. An upper electrode is sealed in the upper furnace body, a heating chamber is provided at the lower part of the upper electrode, and a first sample inlet channel connected to the heating chamber is vertically penetrated at the top of the upper electrode; a lower electrode is provided at the top of the lower furnace body, a crucible seat is provided at the top of the lower electrode, and a graphite crucible is provided on the crucible seat; the lower furnace body is connected to a lifting cylinder, and the lifting cylinder drives the lower furnace body to move up and down; The sampling structure is arranged at the top of the upper furnace body, and includes a sampling body, a second sampling channel is vertically penetrated in the sampling body, and the second sampling channel is connected to the first sampling channel. The sampling body is provided with an injection rod, and the injection rod is connected to a first push rod cylinder, and the first push rod cylinder drives the injection rod to enter or exit the second sampling channel; the sampling body is provided with an inert carrier gas delivery pipe connected to the second sampling channel; An injection slide is provided above the injection body, a funnel-shaped injection groove is provided at the front of the injection slide, a transparent window is provided at the rear of the injection slide, and a transparent sealing member is provided at the transparent window; the injection slide is connected to a second push rod cylinder, which drives the injection slide to move back and forth to switch between the injection position and the observation position; when the injection slide is in the injection position, the injection groove is connected to the second injection channel; when the injection slide is in the observation position, the transparent sealing member is located directly above the second injection channel; During detection, the injection rod enters the second injection channel, the second push rod cylinder drives the injection slide to the injection position, the sample falls into the second injection channel through the injection slot, and the injection rod prevents the sample from entering the first injection channel; the second push rod cylinder drives the injection slide to the observation position; the lifting cylinder drives the lower furnace body to move upward, the graphite crucible enters the heating chamber and is connected to the first injection channel; the lower electrode is in sealed contact with the upper electrode; The inert carrier gas delivery pipe is fed with inert carrier gas to discharge the air in the heating chamber; The first push rod cylinder drives the injection rod to exit the second injection channel, and the sample falls into the graphite crucible; the upper electrode and the lower electrode heat the graphite crucible and the sample; the combustion of the sample is observed through the transparent window and the perspective seal. After the detection is completed, the lifting cylinder drives the lower furnace body to move downward, and the graphite crucible leaves the heating chamber; The cleaning structure is arranged on one side of the pulse heating structure. After the detection is completed, the graphite crucible is removed, and the cleaning structure drives the cleaning brush to move into the heating chamber and rotate to clean the inner wall of the heating chamber.

2. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: The cleaning structure includes a transverse cylinder, a vertical cylinder, a drive unit and a cleaning brush; the cleaning brush is connected to the drive unit, the drive unit is installed on the vertical cylinder, and the vertical cylinder is connected to the transverse cylinder; the transverse cylinder moves to drive the cleaning brush to move to the bottom of the lower electrode, the vertical cylinder moves upward, and drives the cleaning brush to move into the heating chamber, and the drive unit drives the cleaning brush to rotate and clean the inner wall of the heating chamber.

3. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: The driving unit includes a driving mounting frame, a driving motor, a first driving wheel, a second driving wheel and a driving belt; the driving motor is arranged in the driving mounting frame, the driving motor is connected to the first driving wheel, and the driving belt is connected to the first driving wheel and the second driving wheel; the cleaning brush is connected to the second driving wheel, and the driving motor rotates through the first driving wheel, the driving belt and the second driving wheel to drive the cleaning brush to rotate.

4. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: The upper furnace body is provided with a mixed gas delivery pipe communicating with the heating chamber.

5. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A mounting seat is provided below the lower furnace body, and the lifting cylinder is connected to the mounting seat to drive the mounting seat and the lower furnace body to move; a guide seat is provided outside the lower furnace body to guide the lower furnace body when it moves.

6. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A first sealing groove is provided on the connection surface between the outer wall of the upper electrode and the upper furnace body, and a first sealing ring is provided in the first sealing groove.

7. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: An injection mounting plate is provided at the bottom of the injection body, and an injection hole communicating with the second injection channel is provided through the injection mounting plate.

8. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A second sealing groove is provided on the bottom surface of the injection body, the second sealing groove is located on the outer periphery of the second injection channel, and a second sealing ring is provided in the second sealing groove; a third sealing groove is provided on the top surface of the upper furnace body, and a third sealing ring is provided in the third sealing groove.

9. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A through perspective groove is provided at the rear of the sample injection slide, and the transparent window is provided at the top of the through perspective groove; the perspective seal is provided in the through perspective groove, and the perspective seal is provided with a through perspective channel corresponding to the transparent window, and a perspective mirror is sealed in the perspective channel; a fourth sealing groove is provided on the outer periphery of the perspective seal, and a fourth sealing ring is provided in the fourth sealing groove; a fifth sealing groove is provided on the bottom edge of the perspective seal, and a fifth sealing ring is provided in the fifth sealing groove.

10. The actuator for the oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A dust collecting device is provided on one side of the upper furnace body.

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