CN214845034U - Gas chromatograph for propylene analysis - Google Patents
Gas chromatograph for propylene analysis Download PDFInfo
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- CN214845034U CN214845034U CN202120068000.0U CN202120068000U CN214845034U CN 214845034 U CN214845034 U CN 214845034U CN 202120068000 U CN202120068000 U CN 202120068000U CN 214845034 U CN214845034 U CN 214845034U
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Abstract
The utility model discloses a gas chromatograph is used in propylene analysis, include: a gas chromatograph body; a main air supply source communicating with an air inlet of the gas chromatograph body through a first air inlet duct; a check valve disposed on the first intake duct; the standby gas source is connected with the first gas inlet pipeline through a second gas inlet pipeline which is vertically arranged, the top of the second gas inlet pipeline is connected with the part, positioned between the one-way valve and the gas inlet of the gas chromatograph body, of the first gas inlet pipeline, and the bottom of the second gas inlet pipeline is connected with the standby gas source; a gas switching device disposed within the second intake duct. The utility model discloses can be when the main gas supply is not enough, automatic switch to reserve air supply, after the main gas supply air feed, again can automatic switch to the main gas supply, guarantee that the device can continuous use.
Description
Technical Field
The utility model relates to a detecting instrument field. More specifically, the present invention relates to a gas chromatograph for propylene analysis.
Background
The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology.
The existing gas chromatograph for propylene analysis has the problem that the gas chromatograph cannot be used when the gas source is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a propylene is gas chromatograph for analysis, it can be when main air supply is not enough, and automatic switch to reserve air supply, after main air supply air feed, again can automatic switch to main air supply, guarantee that the device can continuous use.
To achieve these objects and other advantages in accordance with the present invention, there is provided a gas chromatograph for propylene analysis, comprising:
a gas chromatograph body;
a main air supply source communicating with an air inlet of the gas chromatograph body through a first air inlet duct;
a check valve disposed on the first intake duct;
the standby gas source is connected with the first gas inlet pipeline through a second gas inlet pipeline which is vertically arranged, the top of the second gas inlet pipeline is connected with the part, positioned between the one-way valve and the gas inlet of the gas chromatograph body, of the first gas inlet pipeline, and the bottom of the second gas inlet pipeline is connected with the standby gas source;
a gas switching device disposed within the second gas inlet duct, the gas switching device comprising:
the limiting block is fixedly arranged in the second air inlet pipeline and is provided with an inverted-frustum-shaped through hole;
the piston is in an inverted circular truncated cone shape, when the piston is inserted into the through hole, and the outer side wall of the piston is attached to the inner side wall of the limiting block, the piston and the limiting block seal the second air inlet pipeline, and when the piston vertically moves upwards to the outer side wall of the piston
When the piston is separated from the inner side wall of the limiting block by a certain distance, the piston does not seal the second air inlet pipeline;
the first fixed block is fixedly arranged in the second air inlet pipeline, is positioned above the limiting block and the piston and is separated from the limiting block and the piston by a certain distance, and the first fixed block does not seal the second air inlet pipeline;
and the two ends of the spring are respectively abutted against the first fixing block and the piston, when the piston is inserted into the through hole, and the outer side wall of the piston is attached to the inner side wall of the limiting block, the spring is in a compression state.
Preferably, in the gas chromatograph for propylene analysis, the first fixing block is annular, and an outer side wall of the fixing block is fixed to an inner side wall of the second air inlet pipe and is connected with the inner side wall of the second air inlet pipe in a seamless manner.
Preferably, in the gas chromatograph for analyzing propylene, the gas switching device further includes:
the second fixed block is fixedly arranged in the second air inlet pipeline, is positioned above the first fixed block and is separated from the first fixed block by a certain distance, and the second air inlet pipeline is not sealed by the second fixed block;
the telescopic link, it sets up along vertical direction, and comprises two sections of sleeves, the great bottom surface fixed connection of diameter on one of them section telescopic bottom in two sections of sleeves and the piston, the other end passes first fixed block, the bottom fixed connection of another section telescopic top and second fixed block, the bottom inserts in a section telescopic top, a section of sleeve with first fixed block does not seal the second admission line, the spring housing is established on a section of sleeve, work as a section telescopic top with when the second fixed block offsets, the piston does not seal the through-hole, the spring does not reach the compression limit.
Preferably, in the gas chromatograph for propylene analysis, an elastic pad is disposed at the bottom of the second fixed block, and the top of the sleeve is opposite to the elastic pad.
Preferably, in the gas chromatograph for analyzing propylene, a pressure reducing valve and a speed regulating valve are provided in a portion of the first gas inlet pipe between the main gas supply source and the check valve, and the pressure reducing valve is located between the main gas supply source and the speed regulating valve.
Preferably, in the gas chromatograph for analyzing propylene, a gas pressure gauge is further provided at a portion of the first gas inlet pipe located between the speed regulating valve and the check valve.
Preferably, in the gas chromatograph for analyzing propylene, the second gas inlet pipe is cylindrical, and the piston and the telescopic rod are coaxially arranged with the second gas inlet pipe.
The utility model discloses at least, include following beneficial effect:
the utility model discloses when using, make the atmospheric pressure of reserve air supply the same with the atmospheric pressure of main air supply source to make reserve air supply open always. When the main air supply source supplies air, the piston is inserted into the through hole of the limiting block under the pressure action of the main air supply source and the spring to block the standby air supply, so that the gas chromatograph body can only supply air through the main air supply source. When main air supply source is not enough, the pressure of spring is overcome to reserve air supply, promotes the piston towards first fixed block for reserve air supply can flow to the gas chromatograph body behind the through-hole through the stopper, and then automatic switch-over to reserve air supply air feed. After the main air supply source supplies air, the piston is reinserted into the through hole of the limiting block under the pressure action of the main air supply source and the spring to block the standby air supply, so that the gas chromatograph body can be automatically switched to the main air supply source for air supply, and the phenomenon that the chromatographic column and the heat conduction detector are damaged due to overhigh temperature when the main air supply source is insufficient can be avoided.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a gas chromatograph for propylene analysis according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a structure at a in fig. 1.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the present invention provides a gas chromatograph for propylene analysis, including:
a gas chromatograph body 1, which is any one of the prior arts, and the present application changes only an air intake manner;
a main air supply source 2 communicating with an air inlet of the gas chromatograph body 1 through a first air inlet duct 3;
a check valve 4 provided on the first intake duct 3;
the standby gas source 5 is connected with the first gas inlet pipeline 3 through a second gas inlet pipeline 6 which is vertically arranged, the top of the second gas inlet pipeline 6 is connected with the part, located between the one-way valve 4 and the gas inlet of the gas chromatograph body 1, of the first gas inlet pipeline 3, and the bottom of the second gas inlet pipeline is connected with the standby gas source 5; the back-up air supply 5 is always open and the air pressure is the same as the main air supply 2.
A gas switching device 7 provided in the second intake duct 6, the gas switching device 7 including:
a limiting block 701 which is fixedly arranged in the second air inlet pipeline 6, wherein the limiting block 701 is provided with a through hole in an inverted frustum shape, namely the top diameter of the through hole is larger than the bottom diameter, and no gap exists between the limiting block 701 and the inner side wall of the second air inlet pipeline 6;
a piston 702 having an inverted circular truncated cone shape, wherein the top diameter of the piston 702 is greater than the bottom diameter, when the piston 702 is inserted into the through hole and the outer sidewall of the piston 702 is engaged with the inner sidewall of the limit block 701, the piston 702 and the limit block 701 seal the second air inlet duct 6, and when the piston 702 moves vertically upward until the outer sidewall of the piston 702 is spaced apart from the inner sidewall of the limit block 701, the piston 702 does not seal the second air inlet duct 6, i.e., the top of the piston 702
The part is separated from the inner side wall of the second air inlet pipeline 6 by a certain distance;
a first fixing block 703 fixedly disposed in the second air inlet duct 6, located above the limiting block 701 and the piston 702, and spaced apart from the limiting block 701 and the piston 702 by a certain distance, wherein the first fixing block 703 does not seal the second air inlet duct
An air inlet duct 6;
two ends of the spring 704 are respectively abutted against the first fixing block 703 and the piston 702, and when the piston 702 is inserted into the through hole and the outer side wall of the piston 702 is attached to the inner side wall of the limiting block 701, the spring 704 is in a compressed state and the compression direction is vertical.
In the gas chromatograph for analyzing propylene provided by the present embodiment, when in use, the pressure of the backup gas source 5 is made the same as the pressure of the main gas supply source 2, and the backup gas source 5 is always opened. When the main air supply source 2 supplies air, the piston 702 is inserted into the through hole of the stopper 701 under the pressure of the main air supply source 2 and the spring 704, and blocks the standby air supply 5, so that the gas chromatograph body 1 can supply air only through the main air supply source 2. When the main air supply source 2 is insufficient, the standby air supply source 5 overcomes the pressure of the spring 704, and pushes the piston 702 towards the first fixing block 703, so that the standby air supply source 5 can flow to the gas chromatograph body 1 through the through hole of the limiting block 701, and then is automatically switched to the standby air supply source 5 for air supply. After the main gas supply source 2 supplies gas, the piston 702 is reinserted into the through hole of the limiting block 701 under the pressure action of the main gas supply source 2 and the spring 704 to block the standby gas source 5, so that the gas chromatograph body 1 can be automatically switched to the main gas supply source 2 for gas supply, and the phenomenon that the chromatographic column and the heat conduction detector are damaged due to overhigh temperature when the main gas supply source 2 is insufficient can be avoided.
In another technical solution, in the gas chromatograph for propylene analysis, the first fixed block 703 is annular, and an outer sidewall of the fixed block is fixed to an inner sidewall of the second air inlet duct 6 and is connected to the inner sidewall in a seamless manner.
In another embodiment, in the gas chromatograph for analyzing propylene, the gas switching device 7 further includes:
a second fixed block 705 which is fixedly arranged in the second air inlet pipeline 6, is positioned above the first fixed block 703, and is at a certain distance from the first fixed block 703, and the second air inlet pipeline 6 is not sealed by the second fixed block 705;
When the main air supply source 2 supplies air, the piston 702 is inserted into the through hole of the stopper 701 under the pressure of the main air supply source 2 and the spring 704, and blocks the standby air supply 5, so that the gas chromatograph body 1 can supply air only through the main air supply source 2. When the main air supply source 2 is insufficient, the standby air supply source 5 overcomes the pressure of the spring 704, the piston 702 is pushed towards the first fixing block 703, the spring 704 is compressed continuously, the sleeve moves upwards until the top of the sleeve abuts against the second fixing block 705, so that the standby air supply source 5 can flow to the gas chromatograph body 1 after passing through the through hole of the limiting block 701, and then the standby air supply source 5 is automatically switched to supply air. After the main air supply source 2 supplies air, the piston 702 is reinserted into the through hole of the stopper 701 under the pressure of the main air supply source 2 and the spring 704 to block the standby air supply 5, so that the gas chromatograph body 1 can be automatically switched to the main air supply source 2 to supply air.
The extension rod 706 can provide guidance during movement of the piston 702 without impeding the upward or downward movement of the piston 702 and prevent the spring 704 from being over compressed when the piston 702 moves upward.
In another technical solution, in the gas chromatograph for propylene analysis, an elastic pad, such as a rubber pad, is disposed at the bottom of the second fixed block 705, and the top of the sleeve is opposite to the elastic pad, so that when the top of the sleeve abuts against the second fixed block 705, the rubber pad can buffer the top of the sleeve, thereby avoiding that, at the initial stage when the standby gas source 5 is started, when the piston 702 is pushed out from the through hole by the pressure generated by the standby gas source 5, the sleeve directly impacts the second fixed block 705, and vibration and noise are generated.
In another technical solution, in the gas chromatograph for analyzing propylene, a pressure reducing valve 8 and a speed regulating valve 9 are disposed on a portion of the first gas inlet pipe 3 located between the main gas supply source 2 and the check valve 4, and the pressure reducing valve 8 is located between the main gas supply source 2 and the speed regulating valve 9.
In another technical solution, in the gas chromatograph for analyzing propylene, a barometer 10 is further disposed on a portion of the first air inlet pipe 3 between the speed regulating valve 9 and the check valve 4.
In another technical solution, in the gas chromatograph for propylene analysis, the second gas inlet pipe 6 is cylindrical, and the limiting block 701, the piston 702 and the telescopic rod 706 are all coaxially arranged with the second gas inlet pipe 6.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (7)
1. A gas chromatograph for analyzing propylene, comprising:
a gas chromatograph body;
a main air supply source communicating with an air inlet of the gas chromatograph body through a first air inlet duct;
a check valve disposed on the first intake duct;
the standby gas source is connected with the first gas inlet pipeline through a second gas inlet pipeline which is vertically arranged, the top of the second gas inlet pipeline is connected with the part, positioned between the one-way valve and the gas inlet of the gas chromatograph body, of the first gas inlet pipeline, and the bottom of the second gas inlet pipeline is connected with the standby gas source;
a gas switching device disposed within the second gas inlet duct, the gas switching device comprising:
the limiting block is fixedly arranged in the second air inlet pipeline and is provided with an inverted-frustum-shaped through hole;
the piston is in an inverted truncated cone shape, when the piston is inserted into the through hole and the outer side wall of the piston is attached to the inner side wall of the limiting block, the piston and the limiting block seal the second air inlet pipeline, and when the piston vertically moves upwards until the outer side wall of the piston is separated from the inner side wall of the limiting block by a certain distance, the piston does not seal the second air inlet pipeline;
the first fixed block is fixedly arranged in the second air inlet pipeline, is positioned above the limiting block and the piston and is separated from the limiting block and the piston by a certain distance, and the first fixed block does not seal the second air inlet pipeline;
and the two ends of the spring are respectively abutted against the first fixing block and the piston, when the piston is inserted into the through hole, and the outer side wall of the piston is attached to the inner side wall of the limiting block, the spring is in a compression state.
2. The gas chromatograph for propylene analysis according to claim 1, wherein the first fixing block has a ring shape, and an outer sidewall of the fixing block is fixed to an inner sidewall of the second gas inlet pipe and is seamlessly connected thereto.
3. The gas chromatograph for analyzing propylene of claim 2, wherein the gas switching device further comprises:
the second fixed block is fixedly arranged in the second air inlet pipeline, is positioned above the first fixed block and is separated from the first fixed block by a certain distance, and the second air inlet pipeline is not sealed by the second fixed block;
the telescopic link, it sets up along vertical direction, and comprises two sections of sleeves, the great bottom surface fixed connection of diameter on one of them section telescopic bottom in two sections of sleeves and the piston, the other end passes first fixed block, the bottom fixed connection of another section telescopic top and second fixed block, the bottom inserts in a section telescopic top, a section of sleeve with first fixed block does not seal the second admission line, the spring housing is established on a section of sleeve, work as a section telescopic top with when the second fixed block offsets, the piston does not seal the through-hole, the spring does not reach the compression limit.
4. The gas chromatograph for propylene analysis according to claim 3, wherein an elastic pad is provided on a bottom of the second fixed block, and a top of the sleeve is opposite to the elastic pad.
5. The gas chromatograph for propylene analysis according to claim 1, wherein a pressure reducing valve and a speed regulating valve are provided in a portion of the first gas inlet line between the main gas supply source and the check valve, and the pressure reducing valve is provided between the main gas supply source and the speed regulating valve.
6. The gas chromatograph for propylene analysis according to claim 5, wherein a barometer is further provided at a portion of the first inlet line between the speed control valve and the check valve.
7. The gas chromatograph for propylene analysis according to claim 3, wherein the second inlet duct has a cylindrical shape, and wherein the piston and the telescopic rod are coaxially disposed with the second inlet duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120068000.0U CN214845034U (en) | 2021-01-11 | 2021-01-11 | Gas chromatograph for propylene analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120068000.0U CN214845034U (en) | 2021-01-11 | 2021-01-11 | Gas chromatograph for propylene analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214845034U true CN214845034U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120068000.0U Active CN214845034U (en) | 2021-01-11 | 2021-01-11 | Gas chromatograph for propylene analysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214845034U (en) |
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2021
- 2021-01-11 CN CN202120068000.0U patent/CN214845034U/en active Active
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