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CN-224216651-U - Novel gas mass spectrometer sampling device

CN224216651UCN 224216651 UCN224216651 UCN 224216651UCN-224216651-U

Abstract

The utility model discloses a novel gas chromatograph-mass spectrometer sampling device, which relates to the technical field of sampling devices and comprises an openable sampling box body, wherein the sampling box body is provided with a sampling pipe and is arranged along the diagonal direction of the sampling box body, two mutually parallel partition boards used for separating spaces are arranged in the sampling box body, a filter screen is detachably arranged on each partition board, a rotary cleaning mechanism which is used for contacting the filter screen and cleaning the filter screen is arranged on each partition board, and a temperature control mechanism is arranged on the front side of the sampling box body. According to the utility model, revolution and autorotation of the screen cleaning brush roller are realized through the rotary cleaning mechanism, the filter screen is prevented from being blocked, the flow speed is ensured to be stable, the temperature controller precisely controls refrigeration and heating, volatilization and degradation of flavor substances are reduced, the accuracy of experimental data is improved, in addition, the rotary cleaning mechanism can stir a sample during cleaning, the convective heat exchange is promoted, the heat exchange efficiency is improved, and the sample can reach the required temperature rapidly.

Inventors

  • LI YING
  • CHEN XIANG
  • SUN JUAN
  • YANG JING
  • SHEN YUAN
  • WU LUN
  • JIA CHEN

Assignees

  • 北京市农产品质量安全中心

Dates

Publication Date
20260508
Application Date
20250523

Claims (8)

  1. 1. The novel gas chromatograph-mass spectrometer sampling device is characterized by comprising an openable sampling box body (100), wherein the sampling box body (100) is provided with a sampling tube (101) and a sampling tube (102), the sampling tube (101) and the sampling tube (102) are arranged along the diagonal direction of the sampling box body (100), two clapboards (200) which are parallel to each other and are used for separating a space are arranged in the sampling box body (100), a filter screen (300) is detachably arranged on each clapboard (200), and a rotary cleaning mechanism (400) which is used for contacting the filter screen (300) and cleaning the filter screen (300) is arranged on each clapboard (200); The front side of the sample injection box body (100) is provided with a temperature control mechanism (500), the temperature control mechanism (500) comprises a liquid storage box (501), a temperature controller (502), a semiconductor refrigeration plate (503), a heating rod (504), a circulating pump (505), a circulating pipe (506) and a temperature sensor (507), and the circulating pipe (506) is led out from the liquid storage box (501) and passes through the sample injection box body (100) and the partition board (200) to enter the liquid storage box (501); The temperature controller (502) receives a temperature signal of the temperature sensor (507) and sends out a control signal to control the opening or closing of the semiconductor refrigeration plate (503), the heating rod (504) and the circulating pump (505).
  2. 2. The novel gas chromatograph-mass spectrometer sampling device of claim 1, wherein the filter screens (300) on the adjacent partition boards (200) are arranged in a staggered manner, and the aperture of the filter screen (300) is gradually reduced along the flow direction of the sample in the sampling box body (100).
  3. 3. The novel gas chromatograph-mass spectrometer sampling device of claim 1, wherein the rotary cleaning mechanism (400) comprises a bracket (401), a motor (402), a mounting plate (403) and a screen cleaning brush roller (404), the bracket (401) is fixedly arranged on the partition board (200), the motor (402) is arranged on the bracket (401), the mounting plate (403) is fixedly connected with the output end of the motor (402), and the screen cleaning brush roller (404) is rotatably arranged on the bracket (401) and is in contact with filtration.
  4. 4. The novel gas chromatograph-mass spectrometer sampling device according to claim 3, wherein one side of the support (401) is fixedly connected with a bevel gear disc (405), the support (401) is fixedly connected with a support (406), a rotating shaft (407) is rotatably arranged on the support (406), one end of the rotating shaft (407) is fixedly connected with a bevel gear (408) meshed with the bevel gear disc (405), the other end of the rotating shaft (407) is fixedly connected with a main rotating disc (409), one end of the screen cleaning brush roller (404) is fixedly connected with an auxiliary rotating disc (410), and a transmission belt (411) is arranged between the main rotating disc (409) and the auxiliary rotating disc (410).
  5. 5. The novel gas chromatograph-mass spectrometer sampling device according to claim 1, wherein the liquid storage tank (501) is fixedly connected to the front surface of the sampling tank body (100), the semiconductor refrigeration plate (503), the heating rod (504) and the circulating pump (505) are all installed inside the liquid storage tank (501) and electrically connected with the temperature controller (502), the temperature sensor (507) is evenly installed inside the sampling tank body (100) and electrically connected with the temperature controller (502), the cold end of the semiconductor refrigeration plate (503) is located inside the liquid storage tank (501), the hot end of the semiconductor refrigeration plate (503) is located outside the liquid storage tank (501), and one end of the circulating pipe (506) is connected with the circulating pump (505).
  6. 6. The novel gas chromatograph-mass spectrometer sampling device of claim 1, wherein the liquid storage tank (501) is filled with glycol aqueous solution, and the liquid level of the glycol aqueous solution is higher than that of the semiconductor refrigeration plate (503), the heating rod (504) and the circulating pump (505).
  7. 7. The novel gas chromatograph-mass spectrometer sampling device of claim 1, wherein the partition board (200) is provided with a through groove (201), the section of the through groove (201) is in a step shape, a mounting frame (600) is arranged in the through groove (201), the filter screen (300) is fixedly connected in the mounting frame (600), the mounting frame (600) is mounted on the partition board (200) through bolts, and a sealing lip (700) is fixedly connected on the mounting frame (600) to realize sealing between the mounting frame (600) and the partition board (200).
  8. 8. The novel gas chromatograph-mass spectrometer sampling device of claim 7, wherein the sealing lip (700) comprises a first lip (701), a second lip (702) and a third lip (703) which are integrally formed, the first lip (701) is fixedly connected to the mounting frame (600), when the mounting frame (600) is connected with the baffle plate (200), the second lip (702) is attached to the first lip (701), and the first lip (701), the second lip (702) and the third lip (703) seal the through groove (201).

Description

Novel gas mass spectrometer sampling device Technical Field The utility model relates to the technical field of sample injection devices, in particular to a novel gas chromatograph-mass spectrometer sample injection device. Background The gas chromatograph and the mass spectrometer are combined to be used, and the effective combination of the gas chromatograph and the mass spectrometer can provide a high-efficiency qualitative and quantitative analysis tool for complex organic compounds for chemists and biochemists, and the gas chromatograph needs to be connected with a sample injection device when in use. The utility model discloses a sampling device of gas chromatography-mass spectrometry instrument for publication number CN212228858U, including openable advance kind casing, advance and set up inclosed filtration storehouse body in the kind casing, advance kind casing and be equipped with into the sampling tube, go out the sampling tube and all be connected to filtration storehouse body, it is equipped with two at least baffles that are parallel to each other and are used for separating the space in the filtration storehouse body, the baffle part is filter screen, and the balance is real, has realized comprehensive efficient filter effect. However, in the above prior art, the filter screen cannot be cleaned in time in the process of filtering the sample, the filter screen is easy to be blocked after long-time use, the pressure difference on two sides of the filter screen caused by accumulation of impurities is increased, the filtering effect is affected, meanwhile, under the premise that the sample is fresh, the volatile flavor substances are easy to be lost or degraded due to the influence of temperature, the prior art cannot meet the control of the temperature of the sample, especially the fresh substances, the loss and chemical change of the volatile components cannot be inhibited, and the accuracy of the analysis result of the sample is directly affected. Disclosure of utility model The utility model aims to solve the problems in the prior art and provides a novel gas chromatograph-mass spectrometer sampling device. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The novel gas chromatograph-mass spectrometer sampling device comprises an openable sampling box body, wherein the sampling box body is provided with a sampling pipe and is arranged along the diagonal direction of the sampling box body, two clapboards which are parallel to each other and are used for separating space are arranged in the sampling box body, a filter screen is detachably arranged on each baffle, and a rotary cleaning mechanism which is used for contacting with the filter screen and cleaning the filter screen is arranged on each baffle; the front side of the sample injection box body is provided with a temperature control mechanism, the temperature control mechanism comprises a liquid storage box, a temperature controller, a semiconductor refrigeration plate, a heating rod, a circulating pump, a circulating pipe and a temperature sensor, and the circulating pipe is led out from the liquid storage box and enters the liquid storage box after passing through the sample injection box body and a partition plate. Preferably, adjacent filter screens are arranged in a staggered manner, and the aperture of each filter screen is gradually reduced along the flow direction of the sample in the sample injection box body. Preferably, the rotary cleaning mechanism comprises a bracket, a motor, a mounting plate and a net cleaning brush roller, wherein the bracket is fixedly arranged on the partition plate, the motor is arranged on the bracket, the mounting plate is fixedly connected with the output end of the motor, and the net cleaning brush roller is rotatably arranged on the bracket and is in contact with filtering. Preferably, one side fixedly connected with awl tooth dish of support, fixedly connected with support on the support, rotationally be provided with the pivot on the support, the one end fixedly connected with of pivot and bevel gear of awl tooth dish meshing, the other end fixedly connected with main carousel of pivot, the one end fixedly connected with auxiliary turntable of net brush roller, the transmission is provided with the drive belt between main carousel and the auxiliary carousel. Preferably, the liquid storage tank is fixedly connected to the front side of the sample injection tank body, the semiconductor refrigeration plate, the heating rod and the circulating pump are all installed in the liquid storage tank and electrically connected with the temperature controller, the temperature sensor is evenly installed in the sample injection tank body and electrically connected with the temperature controller, the cold end of the semiconductor refrigeration plate is located in the liquid storage tank, the hot end of the semiconductor refrigeration plate is located outside