CN212207221U

CN212207221U - Sample injector with convertible sample inlet

Info

Publication number: CN212207221U
Application number: CN202020627380.2U
Authority: CN
Inventors: 胡建立
Original assignee: Shanghai Yiyou Electronic Technology Co ltd
Current assignee: Shanghai Yiyou Electronic Technology Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-12-22
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a convertible injector of introduction port belongs to experimental facilities technical field. The method comprises the following steps: an upper guide pipe is arranged in the sampler main body. One end of the upper conduit is arranged in the heating body in a penetrating way, and the heating body is internally provided with a heating device. One end of the lower conduit is arranged in the connecting hole of the heating body in a penetrating mode, the lower conduit is a capillary column lower conduit or a packed column lower conduit, a capillary column interface device is arranged at one end, deviating from the heating body, of the capillary column lower conduit, and a packed column interface device is arranged at one end, deviating from the heating body, of the packed column lower conduit. The utility model provides a pair of convertible injector of introduction port, the downcomer of different grade type is changed to the accessible to realize the chromatographic column of same injector main part adaptation different grade type.

Description

Sample injector with convertible sample inlet

Technical Field

The utility model relates to an experimental facilities technical field specifically is a convertible injector of introduction port.

Background

At present, in the chromatographic column analysis process, according to different analysis samples, a capillary column is needed for analyzing some samples, and a packed column is needed for analyzing some samples. The capillary column is long and thin, the packed column is short, and the capacity is large. The capillary column is saturated with a much smaller sample than the packed column. Then, at the time of sample injection: the filling sample inlet does not shunt, and the capillary sample inlet shunts. The lower part of the filling sample inlet is connected with a filling column, and the lower part of the capillary sample inlet is connected with a capillary column. Each with a sample suitable for analysis. Different types of sample injectors are required for different types of chromatographic column analysis, and the investment cost for equipment is high.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, it is an object of the present invention to provide a sample injector with a convertible sample inlet, which can be adapted to different types of chromatographic columns by replacing different types of downcomers.

The specific technical scheme is as follows:

a sample inlet-convertible injector, comprising: sampler main part, upper pipe, heating member and downcomer.

An upper guide pipe is arranged in the sampler main body. One end of the upper conduit is arranged in the heating body in a penetrating way, and the heating body is internally provided with a heating device. One end of the lower conduit is arranged in the connecting hole of the heating body in a penetrating mode, the lower conduit is a capillary column lower conduit or a packed column lower conduit, a capillary column interface device is arranged at one end, deviating from the heating body, of the capillary column lower conduit, and a packed column interface device is arranged at one end, deviating from the heating body, of the packed column lower conduit.

In the sample injector with a convertible sample inlet, the capillary column interface device is connected with the capillary chromatographic column, and the packed column interface device is connected with the packed chromatographic column.

In the convertible injector of foretell introduction port, still have such characteristic, the one end edge of downcomer is provided with the joint arch, and the joint groove has been seted up to the connecting hole inner wall of heating member, joint arch and joint groove phase-match, and the joint groove is provided with the opening.

In the sample injector with the convertible sample inlet, the sample injector is characterized in that an external thread is arranged on the outer side of one end of the lower guide pipe, an internal thread is arranged in the connecting hole of the heating body, and the external thread is matched with the internal thread.

In the sample injector with a convertible sample inlet, the heating device further comprises a platinum resistor, a heating wire or a heating rod.

In the sample injector with the convertible sample inlet, the sample injector is further characterized in that a carrier gas path pipe, a shunt gas path pipe and a cleaning gas path pipe are arranged on the side wall of the sampler main body, and the carrier gas path pipe, the shunt gas path pipe and the cleaning gas path pipe are respectively communicated with the upper guide pipe.

The sample injector with a convertible sample inlet has the characteristics that,

and a sealing ring is sleeved on the outer side of one end of the lower guide pipe.

The positive effects of the technical scheme are as follows:

the utility model provides a pair of convertible injector of introduction port, the downcomer of being connected with the heating member is changed to the accessible, the interface arrangement type of different grade type downcomer is different, thereby under the prerequisite of not changing the sampler main part, satisfy the chromatographic column (mainly capillary chromatographic column and packing chromatographic column) adaptation with the different grade type, thereby realize not needing to increase more cost and compromise the analytical application of two kinds of chromatographic columns of capillary chromatographic column and packing chromatographic column when increasing less cost expenditure promptly, the rate of utilization of the injector is improved, the input cost of analytical equipment has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of a sample injector with a convertible sample inlet according to the present invention, in which a capillary column interface device is installed;

FIG. 2 is a schematic structural diagram of a sample injector with a convertible sample inlet according to the present invention, in which a packed column interface device is installed;

fig. 3 is a perspective view of a sample injector with a convertible sample inlet according to the present invention, in which a packing column interface device is installed.

In the drawings: 1. a sampler main body; 2. an upper duct; 3. a heating body; 31. a heating device; 4. a lower conduit; 41. a capillary column interface device; 42. a packed column interface device.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically illustrated in conjunction with fig. 1 to 3.

In the sample injector with the convertible sample inlet, an upper guide pipe 2 is arranged inside a sampler main body 1, a sample port is formed in the top of the general sampler main body 1 and used for introducing a sample, the sample port is communicated with the upper guide pipe 2, and a sample is introduced into the upper guide pipe 2 by a sample introduction product. One end of the upper conduit 2 is arranged in the heating body 3 in a penetrating way, a heating device 31 is arranged in the heating body 3, and the heating device 31 can be used for heating and vaporizing a sample to be analyzed. The conduit is divided into an upper conduit 2 and a lower conduit 4 by a heating body 3, wherein the lower conduit 4 comprises at least two types, the conduit is designed in a detachable manner, and can be selectively replaced according to different chromatographic columns required by actual analysis, one end of the lower conduit 4 is arranged in a connecting hole of the heating body 3 in a penetrating manner, the lower conduit 4 is a capillary column lower conduit or a packed column lower conduit, one end of the capillary column lower conduit, which is deviated from the heating body 3, is provided with a capillary column interface device 41, one end of the packed column lower conduit, which is deviated from the heating body 3, is provided with a packed column interface device 42, and the lower conduit 4 is arranged in an integrated manner, namely the capillary column interface device and the capillary column lower conduit are arranged in an integrated manner, and the packed column interface.

In a preferred embodiment, as shown in fig. 1, 2 and 3, the capillary column interface 41 is connected to a capillary column, and the packed column interface 42 is connected to a packed column, each interface being connected to a corresponding capillary or packed column to match the column used for analysis.

In a preferred embodiment, as shown in fig. 1 and 2, the edge of one end of the lower conduit 4 is provided with a clamping protrusion, the inner wall of the connecting hole of the heating body 3 is provided with a clamping groove, the clamping protrusion is matched with the clamping groove, and the clamping groove is provided with an opening, so that the structure is simple, the dismounting is convenient, and the lower conduit 4 can be replaced quickly.

In a preferred embodiment, as shown in fig. 1 and 2, an external thread is arranged on the outer side of one end of the lower conduit 4, an internal thread is arranged in the connecting hole of the heating body 3, and the external thread is matched with the internal thread, so that the structure is simple, and the connection is stable.

In a preferred embodiment, as shown in fig. 1, 2 and 3, the heating device 31 includes a platinum resistor, a heating wire or a heating rod. Heating wires or heating rods can be selected and arranged according to actual requirements.

In a preferred embodiment, as shown in fig. 1 and 2, a carrier gas line pipe, a shunt gas line pipe, and a cleaning gas line pipe are provided on a side wall of the sampler body 1, and the carrier gas line pipe, the shunt gas line pipe, and the cleaning gas line pipe are respectively communicated with the upper duct.

In a preferred embodiment, as shown in fig. 1 and 2, a sealing ring is sleeved on the outer side of one end of the lower conduit 4 to ensure the sealing property between the lower conduit 4 and the heating body 3 and prevent the sample to be tested from leaking out of the gap between the lower conductor 4 and the heating body 3.

In a preferred embodiment, the inner sidewalls of the capillary column interface 41 and the packed column interface 42 are provided with a sealing ring and a pressing ring, the pressing ring is located below the sealing ring, and the pressing ring is tightly attached to the capillary column or the packed column, so as to improve the sealing effect between the capillary column and the capillary column interface 41 or between the packed column and the packed column interface 42.

In a preferred embodiment, a flow limiting valve is arranged in the internal cavity of the heating body 3, and the sectional area of the internal cavity of the heating body 3 can be adjusted to meet the sample output requirement of a sample under various conditions.

In the following description, a specific embodiment is described, and it should be noted that the structures, processes and materials described in the following embodiment are only used to illustrate the feasibility of the embodiment, and are not intended to limit the scope of the present invention.

In this sample injector with convertible sample inlet, wear to be equipped with the upper conduit in the sampler main part, and still be provided with carrier gas path pipe in the sampler main part, reposition of redundant personnel gas path pipe and washing gas path pipe, above gas path pipe communicates with the upper conduit in the sampler main part respectively, the one end and the heating member of upper conduit are connected, and the one end and the heating member of downcomer are detachable connection, and the form that accessible screw thread matches is connected, also can be connected with joint groove assorted form through joint arch, the one end that different downcomers deviate from the heating member is provided with different interface arrangement, capillary column interface arrangement is used for installing capillary column, packed column interface arrangement is used for installing the packed column, only satisfy the user demand of the chromatographic column of different grade type through changing different downcomers.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. A sample inlet-convertible injector, comprising:

the sampler comprises a sampler main body, wherein an upper guide pipe is arranged in the sampler main body;

one end of the upper conduit is arranged in the heating body in a penetrating way, and a heating device is arranged in the heating body;

the lower guide pipe is integrally arranged, one end of the lower guide pipe is arranged in the connecting hole of the heating body in a penetrating mode, the lower guide pipe is a capillary column lower guide pipe or a packed column lower guide pipe, the capillary column lower guide pipe deviates from one end of the heating body, a capillary column interface device is arranged at one end of the packed column lower guide pipe, and a packed column interface device is arranged at one end of the packed column lower guide pipe, which deviates from the heating body.

2. The inlet-convertible injector according to claim 1, characterized in that the capillary interface is connected to a capillary chromatography column and the packed column interface is connected to a packed chromatography column.

3. The sample injector as claimed in claim 1, wherein a clamping protrusion is disposed on an edge of one end of the lower guiding tube, a clamping groove is disposed on an inner wall of the connecting hole of the heating body, the clamping protrusion is matched with the clamping groove, and the clamping groove is provided with an opening.

4. The sample injector as claimed in claim 1, wherein an external thread is disposed outside one end of the lower conduit, and an internal thread is disposed in the connection hole of the heating body, and the external thread matches the internal thread.

5. The inlet-switchable sample injector of claim 1, wherein the heating device comprises a platinum resistor, a heating wire or a heating rod.

6. The sample inlet-convertible sample injector according to claim 1, wherein a carrier gas line tube, a shunt gas line tube, and a cleaning gas line tube are disposed on a side wall of the sampler body, and the carrier gas line tube, the shunt gas line tube, and the cleaning gas line tube are respectively communicated with the upper guide tube.

7. The sample inlet port-convertible sample injector as claimed in claim 1, wherein a sealing ring is sleeved outside one end of the lower conduit.