Trace detection device

Patent metadata

Field	Value
Publication number	US-11346808-B2
Application number	US-202016934520-A
Country	US
Kind code	B2
Filing date	Jul 21, 2020
Priority date	Jul 23, 2019
Publication date	May 31, 2022
Grant date	May 31, 2022

Abstract

The present disclosure provides a trace detection device. The trace detection device includes: a box body comprising a main body frame and a top plate, the top plate and the main body frame forming a fully enclosed cavity; an ion migration tube assembly in the cavity and on a first side of the cavity; and a preamplifier and high voltage circuit board in the cavity and on a second side of the cavity, the second side being opposite to the first side.

First claim

The invention claimed is:

1. A trace detection device, wherein the trace detection device comprises:
a box body comprising a main body frame and a top plate, the top plate and the main body frame forming a fully enclosed cavity;
an ion migration tube assembly in the cavity and on a first side of the cavity; and
a preamplifier and high voltage circuit board in the cavity and on a second side of the cavity, the second side being opposite to the first side;
wherein the trace detection device further comprises:
a bottom support plate; and
a first buffer bin between the bottom support plate and a bottom plate of the main body frame, with migration gas being input from the first buffer bin to an ion migration tube through a first gas pipe assembly;
wherein the trace detection device further comprises:
a second buffer bin between the bottom support plate and the bottom plate of the main body frame, with exhaust gas of the ion migration tube being output to the second buffer bin through a second gas pipe assembly, the first buffer bin and the second buffer bin being respectively hermetically connected to corresponding parts of the box body through respective O-type rings.

2. The trace detection device according to claim 1 , wherein the ion migration tube assembly comprises: an ion migration tube, a heating layer outside the ion migration tube, and a thermal insulation layer outside the heating layer.

3. The trace detection device according to claim 2 , wherein:
the trace detection device further comprises a multicapillary column inserted into the ion migration tube through a fixing sleeve that passes through a side wall of the box body.

4. The trace detection device according to claim 3 , wherein the fixing sleeve is hermetically connected to an outer surface of the side wall of the box body through an O-type ring.

5. The trace detection device according to claim 2 , wherein the ion migration tube is electrically connected to the preamplifier and high voltage circuit board through a first connecting wire, and the preamplifier and high voltage circuit board is led out of the box body through a second connecting wire.

6. The trace detection device according to claim 5 , wherein the preamplifier and high voltage circuit board is connected to a connector on the box body through the second connecting wire, and the connector transmits a preamplifier signal to a main control board and receives power from the main control board.

7. The trace detection device according to claim 1 , wherein a thermally conductive material is provided between the preamplifier and high voltage circuit board and the top plate of the box body.

8. The trace detection device according to claim 1 , wherein a thermally insulating material is provided between the ion migration tube assembly and the preamplifier and high voltage circuit board.

9. The trace detection device according to claim 1 , wherein the preamplifier and high voltage circuit board is supported by a partition fixed on the bottom plate of the main body frame.

10. The trace detection device according to claim 1 , wherein an outward protruding portion of an end of the top plate is hermetically connected to the main body frame of the box body through an O-type ring.

11. The trace detection device according to claim 1 , wherein the first buffer bin has an air inlet pipe joint, the second buffer bin has an air outlet pipe joint, and a purification device is provided between the air outlet pipe joint of the second buffer bin and the air inlet pipe joint of the first buffer bin.

12. The trace detection device according to claim 11 , wherein a diaphragm pump is further provided between the air outlet pipe joint of the second buffer bin and the purification device.

13. The trace detection device according to claim 7 , wherein the ion migration tube assembly comprises: an ion migration tube, a heating layer outside the ion migration tube, and a thermal insulation layer outside the heating layer.

Assignees

• Nuctech Company Limted
• Univ Tsinghua
• Nuctech Co Ltd

Inventors

• Zhang Qingjun
• Li Yuanjing
• Chen Zhiqiang
• Li Jianmin
• Liu Yinong
• Liu Yaohong
• Zhao Yanqin
• Yan Lili
• Cao Biao
• Ma Qiufeng
• Li Ge

Classifications

• G01N27/622 Primary

  Ion mobility spectrometry · CPC title

• H05K1/0254

  High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection (electrostatic discharge protection for electric apparatus in general H05K9/0067, H05K9/0079); Arrangements for regulating voltages or for using plural voltages · CPC title

• H01J49/02

  Details · CPC title

• H01J49/00

  Particle spectrometers or separator tubes · CPC title

• H05K2201/10151

  Sensor · CPC title