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CN-224216715-U - Sample injection structure for oxygen-nitrogen-hydrogen analyzer

CN224216715UCN 224216715 UCN224216715 UCN 224216715UCN-224216715-U

Abstract

The utility model provides a sample injection structure for an oxygen-nitrogen-hydrogen analyzer, which comprises a sample injection main body, wherein a second sample injection channel is vertically arranged in the sample injection main body in a penetrating manner, a sample injection rod is arranged in the sample injection main body, the sample injection rod is connected with a first push rod cylinder, the first push rod cylinder drives the sample injection rod to enter or exit the second sample injection channel, the sample injection main body is provided with an inert carrier gas conveying pipe communicated with the second sample injection channel, a sample injection sliding plate is arranged above the sample injection main body, the front part of the sample injection sliding plate is provided with a funnel-shaped sample injection groove, the rear part of the sample injection sliding plate is provided with a transparent window, a perspective sealing piece is arranged at the transparent window, the sample injection sliding plate is connected with the second push rod cylinder, the second push rod cylinder drives the sample injection sliding plate to move back and forth between a sample injection position and an observation position, when the sample injection sliding plate is positioned at the sample injection position, the sample injection sliding plate is communicated with the second sample injection channel, and when the sample injection sliding plate is positioned at the observation position, the perspective sealing piece is positioned right above the second sample injection channel.

Inventors

  • LIU MINGZHU

Assignees

  • 上海科果仪器有限公司

Dates

Publication Date
20260508
Application Date
20250717

Claims (10)

  1. 1. A kind of sample introduction structure for oxygen nitrogen hydrogen analysis appearance, characterized by, include: The sample injection device comprises a sample injection main body, a first sample injection channel, a second sample injection channel, a first push rod cylinder, a second push rod cylinder, a first sample injection channel, a second sample injection channel, a first sample injection channel and a second sample injection channel, wherein the second sample injection channel is vertically and penetratingly arranged in the sample injection main body; The sample injection slide plate is arranged above the sample injection main body, a funnel-shaped sample injection groove is formed in the front portion of the sample injection slide plate, a transparent window is formed in the rear portion of the sample injection slide plate, and a perspective sealing piece is arranged at the transparent window; the sample injection slide plate is connected with a second push rod cylinder, the second push rod cylinder drives the sample injection slide plate to move back and forth to switch between a sample injection position and an observation position, and the sample injection groove is communicated with the second sample injection channel when the sample injection slide plate is positioned at the sample injection position; During sample injection, the sample injection rod enters the second sample injection channel, the second push rod cylinder drives the sample injection sliding plate to move to the sample injection position, a sample falls into the second sample injection channel through the sample injection groove, the sample injection rod prevents the sample from passing through the second sample injection channel, the second push rod cylinder drives the sample injection sliding plate to move to the observation position, the inert carrier gas conveying pipe is filled with inert carrier gas to discharge air in the heating cavity, the first push rod cylinder drives the sample injection rod to withdraw from the second sample injection channel, and the sample passes through the second sample injection channel to realize sample injection.
  2. 2. The sample injection structure for an oxygen-nitrogen-hydrogen analyzer according to claim 1, wherein a sample injection mounting plate is arranged at the bottom of the sample injection main body, and a sample injection hole communicated with the second sample injection channel is arranged through the sample injection mounting plate.
  3. 3. The sample injection structure for an oxygen-nitrogen-hydrogen analyzer according to claim 2, wherein a connecting groove is formed in the front end of the sample injection mounting plate, a rotating shaft is rotatably arranged in the connecting groove, a threaded hole is formed in the position, corresponding to the connecting groove, of the rotating shaft, a bolt is screwed into the threaded hole, a fixing groove is formed in the position, corresponding to the connecting groove, of the sample injection main body, and when the sample injection main body is placed on the sample injection mounting plate, the bolt is stirred to be placed in the fixing groove, and the sample injection main body is fixed by screwing the bolt.
  4. 4. The sample injection structure for an oxygen-nitrogen-hydrogen analyzer according to claim 1, wherein a second sealing groove is formed in the bottom surface of the sample injection main body, the second sealing groove is located at the periphery of the second sample injection channel, and a second sealing ring is arranged in the second sealing groove.
  5. 5. The sample injection structure for the oxygen-nitrogen-hydrogen analyzer according to claim 1, wherein a through perspective groove is formed in the rear portion of the sample injection sliding plate, the transparent window is arranged at the top of the perspective groove, the perspective sealing piece is arranged in the perspective groove, a through perspective channel is formed in the perspective sealing piece corresponding to the transparent window, and a perspective mirror is arranged in the perspective channel in a sealing mode.
  6. 6. The sample injection structure for the oxygen-nitrogen-hydrogen analyzer according to claim 5, wherein a fourth sealing groove is formed in the periphery of the perspective sealing piece, a fourth sealing ring is arranged in the fourth sealing groove, a fifth sealing groove is formed in the edge of the bottom surface of the perspective sealing piece, and a fifth sealing ring is arranged in the fifth sealing groove.
  7. 7. The sample injection structure for an oxygen-nitrogen-hydrogen analyzer according to claim 5, wherein the perspective mirror is a magnifying glass, and when the sample injection slide plate is located at the observation position, the combustion condition of the sample is observed in real time through the transparent window and the perspective mirror.
  8. 8. The sample injection structure for the oxygen-nitrogen-hydrogen analyzer according to claim 5, wherein an angle-adjustable reflecting mirror is arranged above the sample injection structure, and the scene of the transparent window and the perspective mirror is obtained through the reflecting mirror to observe the combustion condition of the sample in real time.
  9. 9. The sample injection structure for the oxygen-nitrogen-hydrogen analyzer according to claim 1, wherein the edges of the two sides of the bottom of the sample injection slide plate are provided with sliding grooves, the top edge of the sample injection main body is provided with sliding rails matched with the sliding grooves, and the sample injection slide plate is in sliding connection with the sample injection main body through the sliding rails and the sliding grooves.
  10. 10. The sample injection structure for an oxygen-nitrogen-hydrogen analyzer according to claim 1, wherein a dust cover capable of closing the sample injection groove is provided at the sample injection groove of the sample injection slide plate.

Description

Sample injection structure for oxygen-nitrogen-hydrogen analyzer Technical Field The utility model belongs to the technical field of oxygen nitrogen hydrogen analyzers, and particularly relates to a sample injection structure for an oxygen nitrogen hydrogen analyzer. Background Oxygen and nitrogen are the most important elements affecting the quality of alloy products, and the oxygen, nitrogen and hydrogen content in the alloy is usually detected and analyzed by an oxygen, nitrogen and hydrogen analyzer. Under the protection of inert gas, heating the sample by using a pulse electrode furnace to make the sample melt and decompose at high temperature; the method comprises the steps of gas conversion, namely, reacting oxygen in a sample with carbon in a graphite crucible to generate carbon monoxide (CO), enabling nitrogen and hydrogen to escape in the form of nitrogen (N 2) and hydrogen (H 2) respectively, converting the carbon monoxide (CO) into carbon dioxide (CO 2), conveying the converted mixed gas by an inert carrier gas, detecting and analyzing the mixed gas, namely, firstly, entering an infrared detection system, detecting the content of the carbon dioxide (CO 2) by an infrared absorption method to determine the content of oxygen in the sample, and then, conveying the mixed gas containing the nitrogen (N 2) and the hydrogen (H 2) after removing the components such as the carbon dioxide (CO 2) and the like into a thermal conductivity detector, and determining the content of the nitrogen and the hydrogen according to the difference of thermal conductivities of the gases. The existing sample injection structure of the oxygen-nitrogen-hydrogen analyzer has the problems that the sealing performance is insufficient, the heating condition of a sample cannot be observed in real time, the installation operation is complex, and the like. Accordingly, there is a need to provide a sample injection structure for an oxygen-nitrogen-hydrogen analyzer that solves or at least partially solves the above-mentioned problems. Disclosure of utility model The utility model provides a sample injection structure for an oxygen-nitrogen-hydrogen analyzer, which is used for optimizing the structure, improving the sealing performance and realizing the real-time observation of the heating condition of a sample. In order to achieve the above purpose, the present utility model provides the following technical solutions: A sample injection structure for an oxygen-nitrogen-hydrogen analyzer, comprising: The sample injection device comprises a sample injection main body, a first sample injection channel, a second sample injection channel, a first push rod cylinder, a second push rod cylinder, a first sample injection channel, a second sample injection channel, a first sample injection channel and a second sample injection channel, wherein the second sample injection channel is vertically and penetratingly arranged in the sample injection main body; The sample injection slide plate is arranged above the sample injection main body, a funnel-shaped sample injection groove is formed in the front portion of the sample injection slide plate, a transparent window is formed in the rear portion of the sample injection slide plate, and a perspective sealing piece is arranged at the transparent window; the sample injection slide plate is connected with a second push rod cylinder, the second push rod cylinder drives the sample injection slide plate to move back and forth to switch between a sample injection position and an observation position, and the sample injection groove is communicated with the second sample injection channel when the sample injection slide plate is positioned at the sample injection position; During sample injection, the sample injection rod enters the second sample injection channel, the second push rod cylinder drives the sample injection sliding plate to move to the sample injection position, a sample falls into the second sample injection channel through the sample injection groove, the sample injection rod prevents the sample from passing through the second sample injection channel, the second push rod cylinder drives the sample injection sliding plate to move to the observation position, the inert carrier gas conveying pipe is filled with inert carrier gas to discharge air in the heating cavity, and the first push rod cylinder drives the sample injection rod to withdraw from the second sample injection channel, so that sample injection is realized through the second sample injection channel. Preferably, a sample injection mounting plate is arranged at the bottom of the sample injection main body, and a sample injection hole communicated with the second sample injection channel is arranged through the sample injection mounting plate. Preferably, the front end of the sample introduction mounting plate is provided with a connecting groove, a rotating shaft is rotatably arranged in the connecting groove, a threaded hole is