CN211426389U

CN211426389U - Automatic heating device for gas chromatograph

Info

Publication number: CN211426389U
Application number: CN201922413904.8U
Authority: CN
Inventors: 宋磊; 王涵文; 戴煊
Original assignee: Changzhou Pannuo Apparatus Co ltd
Current assignee: Changzhou Pannuo Apparatus Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-04
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a disclose self-heating's device for gas chromatograph, including the gas chromatograph body, the air inlet intercommunication of gas chromatograph body has gaseous sample inlet pipe, and the fixed cup joint of outer face of cylinder of gaseous sample inlet pipe has polytetrafluoroethylene pipe. This self-heating's for gas chromatograph device, when the temperature of gaseous sample introduction pipe is low, give temperature-sensing switch through temperature sensor with the temperature transfer, make its closure, thereby the intercommunication circuit, make the tracing band carry out the heating work, thereby give polytetrafluoroethylene pipe with the heat transfer, and then give the body of gaseous sample introduction pipe with the heat transfer, realize carrying out the target that heats for gaseous sample introduction pipe, thereby realize the target of gaseous sample introduction pipe mediation, and can not be like producing the noise when using the mechanical pump in the past this moment, the function of noise elimination has been realized, and can also acquire thermistor's resistance value at any time through the resistance display appearance, and then in time know the temperature situation of gaseous sample introduction pipe.

Description

Automatic heating device for gas chromatograph

Technical Field

The utility model relates to a heating device technical field specifically is an automatic heating's for gas chromatograph device.

Background

The existing gas sample injector device occupies a large space, a gas sample injector device needs to be additionally arranged outside a gas chromatograph, the device needs to be provided with a mechanical pump, and the site noise is large. The pipeline in the sample injector needs to be evacuated before sampling every time, so that the sampling time is long, the conventional gas sampling does not have a heating device, and when a gas sample containing high-boiling point substances is introduced, the sample is easily condensed on the pipe wall of the sample injection pipeline, so that the detection of the chromatogram is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic heating's device for gas chromatograph reaches noise abatement and dredges the purpose of gaseous sampling pipe.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a gas chromatograph is with self-heating's device, includes the gas chromatograph body, the air inlet intercommunication of gas chromatograph body has gaseous introduction pipe, the fixed cover of the outer face of cylinder of gaseous introduction pipe has connected polytetrafluoroethylene pipe, the outer face of cylinder of polytetrafluoroethylene pipe is around being connected with the companion tropical, the input electricity of companion tropical is connected with adjustable resistor, adjustable resistor's input electricity is connected with 4Pin plug, the input electricity of 4Pin plug is connected with temperature detect switch, temperature detect switch passes through screw fixed connection at the top of gas chromatograph body, through-hole one has been seted up to the left surface of polytetrafluoroethylene pipe, the left of polytetrafluoroethylene pipe is equipped with thermistor, thermistor passes through-hole one and welds the outer face of cylinder of gaseous introduction pipe, thermistor's output is established ties and is had the double connector, the bottom output electricity of double connector is connected with resistance display, the socket of Pin plug is connected to the top delivery outlet electricity of double-link joint, the left side wall of polytetrafluoroethylene pipe just is located through-hole one and has seted up through-hole two directly over, the left side wall of gas introduction pipe just is located through-hole two and has seted up the recess just right-hand, the recess inner wall is pegged graft and is had temperature sensor, temperature sensor keeps away from the one end of recess and pegs graft at temperature detect switch's output port.

Preferably, the type of the thermistor is a Pt-100 platinum resistor.

Preferably, the wall thickness of the polytetrafluoroethylene tube is 2cm, and the shape and the size of the inner ring of the polytetrafluoroethylene tube are matched with those of the outer surface of the gas sampling tube.

Preferably, the shape and size of the groove are matched with the plug connector of the temperature sensor.

Preferably, the second through hole is cylindrical, and the size of the second through hole is larger than the size of the outer surface of the plug of the temperature sensor.

Preferably, the heat tracing band has a length wound around the surface of the polytetrafluoroethylene tube to just wrap the outer surface of the polytetrafluoroethylene tube.

The utility model provides an automatic heating device for gas chromatograph. The method has the following beneficial effects: when the temperature of gaseous sample inlet pipe is low, give temperature control switch through temperature sensor with the temperature transfer, make it closed, thereby the intercommunication circuit, make the tracing band carry out heating work, thereby give polytetrafluoroethylene pipe with the heat transfer, and then give the body of gaseous sample inlet pipe with the heat transfer, realize giving the target that gaseous sample inlet pipe heated, thereby realize giving the target of gaseous sample inlet pipe mediation, and can not produce the noise like when using mechanical pump in the past this moment, the function of noise elimination has been realized, and can also acquire thermistor's resistance value at any time through the resistance display appearance, and then in time know the temperature situation of gaseous sample inlet pipe.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a cross-sectional view taken along line a-a of fig. 2 in accordance with the present invention;

fig. 4 is an enlarged view of the point B in fig. 3 according to the present invention.

In the figure: the gas chromatograph comprises a gas chromatograph body 1, a gas sampling tube 2, a polytetrafluoroethylene tube 3, a heat tracing band 4, a first through hole 5, a thermistor 6, a resistance display instrument 7, a double-connection joint 8, a Pin plug 94, a second through hole 10, a groove 11, a temperature sensor 12, a temperature control switch 13 and an adjustable resistor 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-4, the present invention provides a technical solution: an automatic heating device for a gas chromatograph comprises a gas chromatograph body 1, wherein an air inlet of the gas chromatograph body 1 is communicated with a gas inlet pipe 2, a polytetrafluoroethylene pipe 3 is fixedly sleeved on the outer cylindrical surface of the gas inlet pipe 2, the heat transfer area of the gas inlet pipe 2 can be increased through the polytetrafluoroethylene pipe 3, the wall thickness of the polytetrafluoroethylene pipe 3 is 2cm, the shape and the size of the inner ring of the polytetrafluoroethylene pipe 3 are matched with the outer surface shape and the size of the gas inlet pipe 2, a heat tracing band 4 is wound around the outer cylindrical surface of the polytetrafluoroethylene pipe 3, electric energy is converted into heat energy through the heat tracing band 4 and is transferred onto a band body, the heat is transferred to the polytetrafluoroethylene pipe 3 through the band body of the heat tracing band 4, the heat is transferred to the gas inlet pipe 2 through the polytetrafluoroethylene pipe 3, the purpose of heating the gas inlet pipe 2 is achieved, the length of the heat tracing band 4 is wound on the surface of the polytetrafluoroethylene pipe 3, the outer surface of the polytetrafluoroethylene tube 3 is just wrapped, the input end of the heat tracing band 4 is electrically connected with an adjustable resistor 14, the resistance value of the resistor 14 is manually adjusted, so that the current in a circuit is changed, the output heat of the heat tracing band 4 in the circuit connection state is finally changed, so that the heating speed of the gas sampling tube 2 is adjusted, the input end of the adjustable resistor 14 is electrically connected with a 4Pin plug 9, the input end of the 4Pin plug 9 is electrically connected with a temperature control switch 13, the temperature control switch 13 is in a normally open state, the circuit is not electrified in the normally open state, when the sensed temperature of the temperature control switch 13 is lower than-150 ℃, the temperature control switch is automatically closed, the circuit is in the electrified state, so that the heat tracing band 4 is electrified to perform heating work, the temperature control switch 13 is fixedly connected to the top of the gas chromatograph body 1 through a screw, the left side surface of the polytetrafluoroethylene tube 3 is, the left side of the polytetrafluoroethylene tube 3 is provided with a thermistor 6, the type of the thermistor 6 is a Pt-100 platinum resistor, the thermistor 6 penetrates through a through hole I5 and is welded on the outer cylindrical surface of the gas sampling tube 2, the output end of the thermistor 6 is connected in series with a double-connection head 8, the bottom output end of the double-connection head 8 is electrically connected with a resistor display instrument 7, the resistance value of the thermistor can be obtained at any time through the resistor display instrument 7, the temperature condition of the gas sampling tube 2 can be known in time, the top output port of the double-connection head 8 is electrically connected with the socket of a 4Pin plug 9, the left side wall surface of the polytetrafluoroethylene tube 3 is positioned right above the through hole I5 and is provided with a through hole II 10, the through hole II 10 is cylindrical, the size of the through hole II 10 is larger than the outer surface size of the plug of the temperature sensor 12, the left side wall surface of the gas sampling tube 2 is positioned right, shape and size of recess 11 and temperature sensor 12's bayonet joint phase-match, recess 11 inner wall is pegged graft and is had temperature sensor 12, when the temperature of gas introduction pipe 2 is low, give temperature detect switch 13 with the temperature transfer through temperature sensor 12, make it closed, thereby the intercommunication circuit, make heat tracing band 4 carry out heating work, thereby give polytetrafluoroethylene pipe 3 with the heat transfer, and then give the body of gas introduction pipe 2 with the heat transfer, realize the target of heating for gas introduction pipe 2, thereby realize the target of dredging for gas introduction pipe 2, and can not produce the noise like the use mechanical pump in the past this moment, the function of noise elimination has been realized, temperature sensor 12 keeps away from the one end of recess 11 and pegs graft at temperature detect switch 13's output port.

The working principle is as follows: during the use, when the temperature of gaseous sample inlet pipe 2 is low, give temperature detect switch 13 with the temperature transfer through temperature sensor 12, make its closure, thereby the intercommunication circuit, make tracing band 4 carry out the heating work, thereby give polytetrafluoroethylene pipe 3 with the heat transfer, and then give the body of gaseous sample inlet pipe 2 with the heat transfer, realize carrying out the target of heating for gaseous sample inlet pipe 2, thereby realize the target of dredging for gaseous sample inlet pipe 2, and can not produce the noise like when using mechanical pump in the past this moment, the function of noise abatement has been realized, and can also acquire the resistance value of thermistor 6 at any time through resistance display instrument 7, and then in time know the temperature situation of gaseous sample inlet pipe 2.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gas chromatograph is with self-heating's device, includes gas chromatograph body (1), its characterized in that: the gas chromatograph comprises a gas chromatograph body (1), wherein a gas inlet of the gas chromatograph body (1) is communicated with a gas inlet pipe (2), the outer cylindrical surface of the gas inlet pipe (2) is fixedly sleeved with a polytetrafluoroethylene pipe (3), the outer cylindrical surface of the polytetrafluoroethylene pipe (3) is wound with a heat tracing band (4), the input end of the heat tracing band (4) is electrically connected with an adjustable resistor (14), the input end of the adjustable resistor (14) is electrically connected with a 4Pin plug (9), the input end of the 4Pin plug (9) is electrically connected with a temperature control switch (13), the temperature control switch (13) is fixedly connected to the top of the gas chromatograph body (1) through screws, a through hole I (5) is formed in the left side surface of the polytetrafluoroethylene pipe (3), a thermistor (6) is arranged on the left side of the polytetrafluoroethylene pipe (3), and the thermistor (6) penetrates through the through hole I (5) and is welded on the outer cylindrical surface of the gas inlet pipe (2), the output of thermistor (6) is established ties and is had double-link (8), the bottom output electricity of double-link (8) is connected with resistance display appearance (7), the socket of the top delivery outlet electricity of double-link (8) at 4Pin plug (9), through-hole two (10) have been seted up directly over the left side wall of polytetrafluoroethylene pipe (3) and being located through-hole one (5), the left side wall of gaseous sample inlet pipe (2) just is located through-hole two (10) right-hand seting up fluted (11), recess (11) inner wall is pegged graft and is had temperature sensor (12), the output port at temperature detect switch (13) is pegged graft to the one end that recess (11) were kept away from in temperature sensor (12).

2. The automatic heating device for gas chromatograph of claim 1, wherein: the type of the thermistor (6) is a Pt-100 platinum resistor.

3. The automatic heating device for gas chromatograph of claim 1, wherein: the wall thickness of the polytetrafluoroethylene tube (3) is 2cm, and the shape and the size of the inner ring of the polytetrafluoroethylene tube (3) are matched with those of the outer surface of the gas sampling tube (2).

4. The automatic heating device for gas chromatograph of claim 1, wherein: the shape and the size of the groove (11) are matched with the plug connector of the temperature sensor (12).

5. The automatic heating device for gas chromatograph of claim 1, wherein: the shape of the second through hole (10) is cylindrical, and the size of the second through hole (10) is larger than the size of the outer surface of the plug connector of the temperature sensor (12).

6. The automatic heating device for gas chromatograph of claim 1, wherein: the heat tracing band (4) is wound on the surface of the polytetrafluoroethylene tube (3) in length and just wraps the outer surface of the polytetrafluoroethylene tube (3).