Monitoring device for radially monitoring column head position of chromatographic column in real time

Abstract

The monitoring device for radially monitoring the position of the column head of the chromatographic column in real time comprises a sample injection pipe and a liner pipe, the liner pipe extends into the sample injection pipe and is fixed, an opening for the column head of the chromatographic column to enter is formed in the lower portion of the sample injection pipe, the monitoring device further comprises a measuring probe, the measuring probe comprises a transmitting end and a receiving end which are arranged in pairs, and the transmitting end and the receiving end are communicated with each other. The transmitting end and the receiving end are arranged along the axis direction of the sample injection pipe, the transmitting end is fixed on the inner side wall of the sample injection pipe, the receiving end is fixed on the inner side wall of the sample injection pipe opposite to the transmitting end, and the measuring probe is connected with a counting unit used for calculating the number of the receiving end and the transmitting end cut by a column head. And the counting unit is connected with a judgment unit for judging whether the length of the column head entering the sample injection pipe is within a working range according to the number of the receiving end and the transmitting end cut by the column head. The position of the column head can be monitored in real time, and the column head can be conveniently adjusted to a designated position.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of gas chromatograph, concretely relates to a monitoring device for radial real -time monitoring chromatographic column head position. BACKGROUND

[0002] Gas chromatography analysis technique is the most common one in chemical analysis technique, has high sensitivity, strong selectivity, fast analysis speed, wide application, simple operation etc. Generally, the chromatographic column and the sampling tube interface are fixed through the fixed bolt, and the fixed bolt has a circular hole through the axial direction for the chromatographic column to pass through.

[0003] The important goal of the installation connection is to accurately send the top end of the column head to the specified position of the sampling tube or the conventional detector.

[0004] 1. The column head position cannot be monitored in real time, and the chromatographic column cannot be accurately positioned during the installation process due to the small operation space, and displacement is prone to occur.

[0005] 2. The existing method is to hold the ruler to measure the length of the column head, which is prone to shaking and has low accuracy. SUMMARY

[0006] In order to overcome the defects that the prior art cannot monitor the column head position in real time and cannot accurately adjust the column head position, the utility model provides a monitoring device for radial real-time monitoring of the column head position of the chromatographic column, which can monitor the position of the column head in real time and facilitate the adjustment of the column head to the specified position.

[0007] The utility model solves the technical problems by adopting the following technical solutions:

[0008] The monitoring device for monitoring the position of the column head of a chromatographic column in real time comprises a sample inlet tube and a liner tube, the liner tube is inserted into the sample inlet tube and fixed, an opening is arranged below the sample inlet tube for the column head of the chromatographic column to enter, the monitoring device further comprises a measuring probe, the measuring probe comprises a pair of emitting end and receiving end, the emitting end and the receiving end are arranged along the axial direction of the sample inlet tube, the emitting end is fixed on the inner wall of the sample inlet tube, the receiving end is fixed on the inner wall of the sample inlet tube opposite to the emitting end, the measuring probe is connected with a counting unit for counting the number of the emitting end and the receiving end cut off by the column head, the counting unit is connected with a judging unit for judging whether the length of the column head entering the sample inlet tube is within the working range according to the number of the emitting end and the receiving end cut off by the column head.

[0009] Preferably, the measuring probe is an infrared or laser probe. In this scheme, the rays emitted by the emitting end can be infrared or laser, or other light rays, part of the rays emitted by the emitting end will be blocked by the column head, and the other part of the rays will enter the receiving end of the receiving end through the successful docking of the receiving end and the emitting end, so that the real-time position of the end of the column head can be known, and the column head can be conveniently adjusted to a reasonable range.

[0010] As a preferred scheme, the upper limit of the preset range value of the judging unit is a number of the receiving end and the emitting end cut off by the column head, and the lower limit of the preset value is b, b

[0011] Further, the judging unit is connected with a prompting unit for displaying the result of the judging unit, and the prompting unit is connected with a display. When the number of rays is between a and b, the display is green, when the number of rays is greater than a, it means that the column head is too short, and the display is yellow, when the number of rays is less than b, it means that the column head is too long, and the display is red. Of course, the preset color can also have many kinds, different colors can be displayed according to different successful docking numbers, and the specific color is subject to the convenience of judging whether the column head is in the installation position. The more the number of rays is, the more accurate the judgment of the position of the column head is.

[0012] Further, the opening of the sample inlet tube is screw-shaped, and the monitoring device further comprises a fixing bolt, the upper end of the fixing bolt matches the opening of the sample inlet tube. When the fixing bolt is screwed, the chromatographic column is fixed.

[0013] The fixing bolt is provided with a through hole for the column head of the chromatographic column to pass through, the bottom of the liner tube is provided with a through hole for the end of the column head of the chromatographic column to enter, and the through hole of the fixing bolt is aligned with the through hole of the liner tube. The column head can accurately enter the liner tube.

[0014] The technical concept of the utility model discloses: install the measuring probe on the inside wall of the sample inlet pipe, the number of successful docking of the transmitting end and the receiving end is confirmed, so that the real-time position of the column head end part is known, and the column head is conveniently adjusted.

[0015] The utility model discloses the position of the column head can be monitored in real time, and the column head is conveniently adjusted to the specified position. DRAWINGS

[0016] Figure 1 It is the sectional view of the monitoring device for radial real-time monitoring of the position of the column head of the chromatographic column;

[0017] Figure 2 It is the control principle diagram of the monitoring device for radial real-time monitoring of the position of the column head of the chromatographic column.

[0018] Fig. 1 is a schematic view of the monitoring device for radial real-time monitoring of the position of the column head of the chromatographic column; DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings.

[0020] Refer to Figure 1 and Figure 2 A kind of monitoring device for radial real-time monitoring of the position of the column head of the chromatographic column, including sample inlet pipe 2 and bushing 3, the bushing 3 extends into the sample inlet pipe 2, the opening for the column head 4 of chromatographic column is equipped with below the sample inlet pipe 2, the monitoring device further includes measuring probe 1, the measuring probe 1 includes the transmitting end and receiving end of being arranged in pairs, the transmitting end and receiving end are arranged along the axis direction of the sample inlet pipe 2, the transmitting end is fixed on the inside wall of sample inlet pipe 2, the receiving end is fixed on the inside wall of sample inlet pipe 2 opposite the transmitting end, the measuring probe 1 is connected with the counting unit for calculating the number of receiving end and transmitting end being truncated by column head, the counting unit is connected with the judging unit according to the number of receiving end and transmitting end being truncated by column head, whether the length of column head 4 entering the sample inlet pipe 2 is in the working range is judged.

[0021] Preferably, the measuring probe 1 transmitting end emitted rays can be infrared or laser, or other light rays, when the column head 4 extends into the cavity of the sample inlet pipe 2, part of the rays emitted by the lower part of the transmitting end will be blocked by the column head 4, the upper part of the rays will still enter the receiving end of the receiving end, and the number of successful docking of the receiving end and the transmitting end can know the real-time position of the column head 4 end part, and the column head 4 is conveniently adjusted to a reasonable range.

[0022] As a preferred scheme, the determining unit can preset a range value, the upper limit of the preset range value is that a number of receiving ends and transmitting ends are truncated by the column head, the lower limit of the preset value is that b number of receiving ends and transmitting ends are truncated by the column head, b < a, and when between a and b, the position of the end of the column head 4 is within a reasonable range. The specific number can be adjusted as needed.

[0023] The determining unit is connected with a prompting unit for displaying the result of the determining unit. The display unit is connected to a display, when the number of rays is between a and b, the display is green, when the number of rays is less than b, it indicates that the column head 4 is too short, the display is yellow, and when the number of rays is greater than a, it indicates that the column head 4 is too long, the display is red. Of course, the preset color can also be various, different colors are displayed according to different successful numbers of docking, and the specific one is accurate for judging whether the column head 4 is in the mounting position. The more the number of rays is, the more accurate the position of the column head 4 is.

[0024] The opening of the sample tube 2 is thread-shaped, and the monitoring device further comprises a fixing bolt 5, the upper end of the fixing bolt 5 matches the opening of the sample tube 2. The fixing bolt 5 is screwed to fix the chromatographic column. The fixing bolt 5 is provided with a through hole for the column head 4 of the chromatographic column to pass through, the bottom of the liner tube 3 is provided with a through hole for the end of the column head 4 of the chromatographic column to enter, and the through hole of the fixing bolt 5 is aligned with the through hole of the liner tube 3. The column head 4 can accurately enter the liner tube 3.

[0025] The working process of the embodiment is as follows:

[0026] When measuring the position of the column head 4 of the sample tube 2 or the column head 4 of the conventional detector, the measuring probe 1 is fixed at the inner wall side of the sample tube 2 or the conventional detector, the column head 4 is inserted into the bottom end of the sample tube 2 or the conventional detector, the measuring probe 1 starts to measure the specific position of the column head 4, the operator adjusts the reasonable position according to the feedback position information, and after the reasonable position is reached, the fixing bolt 5 is tightened to complete the installation of the chromatographic column end of the sample tube 2. The utility model can realize real-time monitoring of the position of the column head 4, the position measurement is accurate and efficient, the error of manual estimation can be avoided, and the accurate installation of the column head 4 of the chromatographic column is ensured.

[0027] The content described in the embodiment of the present application is only a list of implementation forms of the utility model concept, and is only for illustrative purposes. The protection scope of the utility model should not be regarded as being limited to the specific forms described in the embodiment, and the protection scope of the utility model also extends to the equivalent technical means that can be thought of by those skilled in the art according to the inventive concept.

Claims

1. A monitoring device for radial real-time monitoring of the column head position in a chromatographic column, characterized in that, The monitoring device includes an injection tube and a liner. The liner extends into and is fixed within the injection tube. An opening is provided at the bottom of the injection tube for the column head to enter. The monitoring device also includes a measuring probe, which includes a pair of transmitters and receivers arranged along the axis of the injection tube. The transmitter is fixed to the inner wall of the injection tube, and the receiver is fixed to the inner wall of the injection tube opposite the transmitter. The measuring probe is connected to a counting unit for calculating the number of times the receiver and transmitter are truncated by the column head. The counting unit is connected to a determination unit for judging whether the length of the column head entering the injection tube is within the working range based on the number of times the receiver and transmitter are truncated by the column head.

2. The monitoring device for radial real-time monitoring of the column head position of a chromatographic column as described in claim 1, characterized in that: The measuring probe is an infrared or laser probe.

3. A monitoring device for radial real-time monitoring of the column head position of a chromatographic column as described in claim 1 or 2, characterized in that: The determination unit is connected to a prompting unit for displaying the result of the determination unit, and the prompting unit is connected to a display.

4. A monitoring device for radial real-time monitoring of the column head position of a chromatographic column as described in claim 1 or 2, characterized in that: The opening of the injection tube is threaded, and the monitoring device includes a fixing bolt, the upper end of which matches the opening of the injection tube.

5. The monitoring device for radial real-time monitoring of the column head position of a chromatographic column as described in claim 4, characterized in that: The fixing bolt has an opening for the column head to pass through, and the bottom of the liner has an opening for the end of the column head to enter. The openings of the fixing bolt and the liner are aligned vertically.

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