CN217278127U - Flame-proof FID detector - Google Patents

Abstract

The utility model provides a flame proof FID detector, include flame proof device and install the FID main part in flame proof device, flame proof device includes the base, and the flame proof bucket is connected to the base, and flame arrester seat is connected to flame proof bucket upper end, is provided with the mounting hole on the flame arrester seat, installs flame arrester and flame arrester lock in the mounting hole and mother, be provided with the inlet port on the base, the metal cutting ferrule joint is installed to the inlet port lower extreme, and the intake pipe inserts metal cutting ferrule and connects to the FID main part in connecting. When the explosion-proof FID detector works, components with higher voltage and current are effectively isolated inside the explosion-proof FID, so that the explosion-proof requirement is met, and potential safety hazards are avoided; the FID main body is of an integrated structure and is convenient to assemble, disassemble and maintain.

Description

Flame-proof FID detector

Technical Field

The utility model belongs to the technical field of gaseous detection, especially, relate to a flame proof FID detector.

Background

A hydrogen Flame Ion Detector (FID) is a high-sensitivity universal detector, which has response to almost all organic substances, has no response or little response to inorganic substances, inert gases or substances which are not dissociated in flames and the like, and is widely used for online or on-site detection of volatile hydrocarbons in chemical industry and natural gas industry. These industries have stringent explosion-proof requirements for detection instruments due to the presence of flammable gases. The FID has high voltage and high current just when the FID polarizes, amplifies and ignites the components and parts to work, and realizes the detection function through the burning of hydrogen, and hydrogen is inflammable and explosive substance equally, and the FID used in these occasions must satisfy the flameproof requirement in the coexistence of hydrogen and flame. Because the corresponding explosion-proof design standard must be satisfied, the common FID on the market has larger size and is difficult to disassemble, install and maintain.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the great, comparatively difficult technical problem of dismantlement installation maintenance of current flame-proof type FID size, provide a compact structure, components and parts are dismantled, are changed convenient flame-proof type FID detector.

In order to achieve the above object, the utility model discloses a technical scheme be:

the utility model provides a flame proof FID detector, includes flame proof device and installs the FID main part in flame proof device, flame proof device includes the base, and the flame proof bucket is connected to the base, and flame arrester seat is connected to flame proof bucket upper end, is provided with the mounting hole on the flame arrester seat, installs flame arrester and flame arrester lock in the mounting hole and mother, be provided with the inlet port on the base, the metal cutting ferrule joint is installed to the inlet port lower extreme, and the intake pipe inserts metal cutting ferrule and connects to the FID main part in connecting.

Preferably, the FID main part is including installing the insulated column on the base, has set gradually polarization circuit board, tetrafluoro gasket, FID base and FID footstock on the insulated column, and the silk of igniting is installed to FID footstock top, installs insulating ring and polarization seat in the FID base, still is provided with nozzle and back taper joint on the FID base, and a intake pipe is connected respectively to nozzle and back taper joint.

Preferably, the base is connected with the explosion-proof barrel through threads.

Preferably, a through hole is formed in the center of the base, and a cable connected to the polarized circuit board is installed in the through hole.

Preferably, the through hole of the base and the cable are sealed through high-temperature-resistant sealant.

Preferably, a PEEK hand-screwed joint is installed at the upper end of the air inlet hole.

Preferably, the insulating ring is made of alumina ceramics.

Preferably, the FID base and the FID top are made of polytetrafluoroethylene or PEEK.

Preferably, the inner wall of the through hole of the base is provided with a groove.

Preferably, the polarization base is made of stainless steel, and the surface of the polarization base is subjected to electrolytic polishing treatment.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. this flame proof FID detector includes the flame proof device who is connected the head and constitutes by base, flame proof bucket, flame arrester seat, flame arrester lock, flame arrester, stainless steel card, and the inside flame proof cavity that forms of flame proof device, FID main part are installed in this flame proof cavity, and the components and parts of higher voltage, electric current are by effectual isolated inside explosion proof FID during operation, satisfy the flame proof requirement, avoid the potential safety hazard.

2. The FID main body module is connected into a whole through the isolation column and the screw, the base is in threaded connection with the explosion-proof barrel, the FID main body can be screwed out only by rotating the base during disassembly, and the FID main body can be installed in the explosion-proof barrel after external assembly is finished, so that the assembly and maintenance of the FID are greatly facilitated;

3. the cutting ferrule joint, the metal cutting ferrule joint and the PEEK hand-screwing joint adopt standard parts or finished parts, the stainless steel air inlet capillary tube is connected with the polytetrafluoroethylene hydrogen tube and the sample gas tube through the metal cutting ferrule joint and the PEEK hand-screwing joint, and the cutting ferrule joint, the metal cutting ferrule joint and the PEEK hand-screwing joint are simple and ingenious and avoid the defects of difficult processing and high cost caused by small-diameter deep holes.

Drawings

FIG. 1 is a cross-sectional view of the flame-proof FID detector of the present invention;

FIG. 2 is a schematic structural diagram of the FID main body part of the flame-proof FID detector of the present invention;

FIG. 3 is a schematic view of the air inlet and cable sealing structure of the flame-proof FID detector of the present invention;

in the above figures: 1. a base; 2. c, manually screwing a joint with PEEK; 3. an isolation column; 4. a polarizing circuit board; 5. a tetrafluoro spacer; 6. an FID base; 7. an FID header; 8. an explosion-proof barrel; 9. a flame arrester seat; 10. a flame arrester lock nut; 11. a flame arrestor; 12. an ignition wire; 13. a thermocouple; 14. a polarization base; 15. an insulating ring; 16. an inverted cone joint; 17. a nozzle; 18. a hydrogen pipe; 19. sampling the gas pipe; 20. a metal ferrule fitting; 21. a cable; 22. sealing glue; 23. a sample gas inlet capillary tube; 24. a hydrogen inlet capillary.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The embodiment is as follows: as shown in fig. 1-2, a flame-proof FID detector comprises a flame-proof device consisting of a base 1, a flame-proof barrel 8, a flame arrester seat 9, a flame arrester lock nut 10, a flame arrester 11 and a metal ferrule adapter 20, wherein a flame-proof cavity is formed inside the flame-proof device, and a FID main body is installed in the flame-proof cavity.

The flame-proof barrel 8 is connected to specific base 1, and flame arrester seat 9 is connected to flame-proof barrel 8 upper end, is provided with the mounting hole on the flame arrester seat 9, installs flame arrester 11 and flame arrester lock in the mounting hole and female 10. The flame arrester 11 is in interference fit with the flame arrester seat 9 and is used for flame isolation and water vapor discharge. Be provided with two inlet ports on the base 1, be hydrogen inlet port and sample gas inlet port respectively, metal cutting ferrule connects 20 is all installed to two inlet port lower extremes, and two inlet port upper ends installation plastics PEEK hand twist connect 2, and hydrogen inlet capillary 24 and sample gas inlet capillary 23 insert and connect to the FID main part in the metal cutting ferrule connects 20. The base 1, the explosion-proof barrel 8, the flame arrester seat 9 and the flame arrester lock nut 10 are preferably made of stainless steel or aluminum alloy, and the hydrogen gas inlet capillary 24 and the sample gas inlet capillary 23 are made of stainless steel so as to meet the explosion-proof requirement.

The FID main body comprises an isolation column 3 installed on the base 1, and a polarization circuit board 4, a tetrafluoro gasket 5, an FID base 6 and an FID top seat 7 are sequentially arranged on the isolation column 3. An insulating ring 15 and a polarization seat 14 are installed in the FID base 6, the top of the insulating ring 15 is inserted into the polarization seat 14, and a wire is welded on the polarization seat 14. The insulating ring 15 is preferably made of alumina ceramic or other high temperature resistant insulating material. The FID top seat 7 is fixed together with the FID base 6 through a fastener, the side face of the FID top seat is provided with a hole, a thermocouple 13 is in interference fit, and an ignition wire 12 is installed at the top of the FID top seat. The FID base 6 is also provided with a nozzle 17 and an inverted cone joint 16, the nozzle 17 is preferably made of stainless steel, and the inner surface and the outer surface of the nozzle 17 are plated with gold or silanized. The nozzle 17 is connected to a hydrogen pipe 18, and the inverted cone adapter 16 is connected to a sample gas pipe 19, so that the sample gas and hydrogen gas enter the FID base 6 to be mixed. The other ends of the hydrogen pipe 18 and the sample gas pipe 19 are both connected to the PEEK hand screwed joint 2, and form a passage with the hydrogen inlet capillary 24 and the sample gas inlet capillary 23 of the base 1. The FID base 6 and the FID top seat 7 are preferably made of tetrafluoro or PEEK, the hydrogen pipe 18 and the sample gas pipe 19 are made of polytetrafluoroethylene, and the tetrafluoro is respectively connected with a gas inlet pipe to reduce adsorption.

The FID main body module is connected into a whole through the isolation column 3 and the screw, the base 1 is connected with the explosion-proof barrel 8 through threads, the FID main body can be screwed out only by rotating the base 1 during disassembly, and assembly and maintenance of the FID are greatly facilitated; all pipelines are in interference fit through the metal ferrule connectors 20, so that the pipelines are convenient to clean or replace; the polarizing circuit board 4 is circular with an opening for pipeline introduction, and is installed along the cylinder axis, and is small and compact in size.

The lead wires of the polarization base 14, the thermocouple 13 and the ignition wire 12 can be led in and connected to the polarization circuit board 4 through the openings on the FID base 6 and the FID top base 7; the base 1 center sets up the through-hole, installs the cable 21 that is connected to polarization circuit board 4 in the through-hole. As shown in fig. 3, the through hole is sealed by glue filling, and the inner wall of the through hole is provided with two grooves, so that the solidified sealant 22 can be combined more tightly, and the sealant 22 is prevented from falling off to cause explosion suppression failure. The sealant is preferably high-temperature resistant organosilane sealant, and certain high-temperature resistant hot melt adhesives can be selected

The welding of polarization circuit board 4 has high-voltage module, the relevant electronic components of ignition coil, and these components and parts of higher voltage, electric current are effectual isolated inside flame proof device during operation, avoid the potential safety hazard.

The operation process of the explosion-proof FID detector is as follows:

1. hydrogen and sample gas are respectively introduced into the hydrogen gas inlet capillary 24 and the sample gas inlet capillary 23, enter the explosion-proof cavity and are mixed in the cavity formed by the FID base 6 and the insulating ring 15 to form hydrogen-rich mixed gas;

2. the ignition wire 12 is controlled by the MCU to work and ignite the mixed gas;

3. a voltage of 150-220V is applied to the polarization base 14, and ions are generated at the flame. Under the action of the polarizing voltage, the current between the nozzle 17 and the polarizing pole increases and is linearly related to the concentration of the hydrocarbon compound in the sample gas;

4. the electric signal is led into the polarized circuit board 4 through a lead on the nozzle 17 and is connected to the main board through a cable 21;

5. the thermocouple 13 prompts a user whether the FID is successfully ignited or not by detecting the temperature rise and the temperature difference value before and after ignition, so that the use safety is improved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the equivalent embodiments modified or adapted by the above-mentioned technical contents to other fields without departing from the technical spirit of the present invention.

Claims (10)

1. The flame-proof FID detector is characterized in that: including flame proof device and install the FID main part in flame proof device, flame proof device includes the base, and the flame proof bucket is connected to the base, and flame arrester seat is connected to flame proof bucket upper end, is provided with the mounting hole on the flame arrester seat, installs flame arrester and flame arrester lock in the mounting hole and closes, be provided with the inlet port on the base, the metal cutting ferrule joint is installed to the inlet port lower extreme, and the intake pipe inserts metal cutting ferrule and connects in the joint to the FID main part.

2. The flameproof FID detector of claim 1, characterized in that: the FID main part is including installing the insulated column on the base, has set gradually polarization circuit board, tetrafluoro gasket, FID base and FID footstock on the insulated column, and the silk of igniting is installed to FID footstock top, installs insulating ring and polarization seat in the FID base, still is provided with nozzle and back taper joint on the FID base, and a intake pipe is connected respectively to nozzle and back taper joint.

3. The flameproof FID detector of claim 1, characterized in that: the base is connected with the explosion-proof barrel through threads.

4. The flameproof FID detector of claim 2, characterized in that: the base center sets up the through-hole, installs the cable that is connected to the polarization circuit board in the through-hole.

5. The flameproof FID detector of claim 4, characterized in that: the through hole of the base is sealed with the cable through high-temperature-resistant sealant.

6. The flameproof FID detector of claim 5, characterized in that: the inner wall of the through hole of the base is provided with a groove.

7. The flameproof FID detector of claim 1, characterized in that: and a PEEK hand-screwed joint is installed at the upper end of the air inlet hole.

8. The flameproof FID detector of claim 2, characterized in that: the insulating ring is made of alumina ceramic.

9. The flameproof FID detector of claim 2, characterized in that: the FID base and the FID top seat are made of polytetrafluoroethylene or PEEK.

10. The flameproof FID detector of claim 2, characterized in that: the polarization seat is made of stainless steel, and the surface of the polarization seat is subjected to electrolytic polishing treatment.

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