An auxiliary ignition device for a gas chromatograph FID detector

Abstract

The utility model relates to gas chromatography detection technical field, concretely for a kind of auxiliary ignition device for gas chromatograph FID detector, including detection pipeline, the lower end of detection pipeline is detachably connected with injection pipeline by sealing element, first injection pipe and second injection pipe are fixedly and conductively provided on injection pipeline, gas mixing structure is detachably connected in injection pipeline, air pipeline is communicated and set near the upper end of detection pipeline, electric valve and pressure relief valve are detachably connected on air pipeline respectively, pressure gauge is detachably connected on electric valve, through the gas mixing structure being set, after different gas respectively passes first injection pipe and second injection pipe and enters injection pipeline, through the buffer board of inverted V shape, the flow velocity of gas can be slowed down, the mixing efficiency of gas is improved, through the effect of driving part, driving rod and mixing plate, the mixing effect of gas can be further improved, and then the purpose of quick ignition can be realized.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography detection technology, and more specifically to an auxiliary ignition device for the FID detector of a gas chromatograph. Background Technology

[0002] When using a gas chromatograph in the laboratory, the FID detector may experience ignition difficulties after prolonged use. Since igniters are relatively expensive (generally around 500-1000 yuan for manufacturer products), and since ignition does not affect subsequent experiments and the igniter can start normally, the conventional laboratory method is to use a bulb syringe to blow air to assist ignition. The operating procedure requires repeatedly opening and closing the instrument cover during the instrument startup process, which is cumbersome and may cause the headspace sampler's transmission line to break.

[0003] Therefore, we propose an auxiliary ignition device for the FID detector of a gas chromatograph. Utility Model Content

[0004] One of the technical problems this application aims to solve is that using a bulb syringe for gas-assisted ignition requires repeatedly opening and closing the instrument cover during the instrument startup process, which is cumbersome and may cause the headspace sampler's transmission line to break, and also addresses the issue of low gas mixing efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An auxiliary ignition device for a gas chromatograph FID detector includes a detection pipe, the lower end of which is detachably connected to a gas injection pipe via a seal. A first gas injection tube and a second gas injection tube are fixedly connected to the gas injection pipe. A gas mixing structure is detachably connected inside the gas injection pipe. An air pipe is connected near the upper end of the detection pipe. An electric valve and a pressure relief valve are detachably connected to the air pipe. A pressure gauge is detachably connected to the electric valve.

[0007] In some embodiments, both the detection pipe and the gas injection pipe have external threads on their adjacent ends, and the sealing element includes a sealing threaded sleeve that is screwed into the external threads.

[0008] In some embodiments, the seal further includes a sealing ring, which is fixedly installed below the detection pipe. The gas injection pipe has an annular groove that matches the sealing ring, and the sealing ring is inserted into the annular groove.

[0009] In some embodiments, the gas mixing structure includes a buffer plate, which is inverted V-shaped and used to reduce the gas flow velocity. Diversion holes are distributed on both sides of the buffer plate.

[0010] In some embodiments, the buffer plate has protrusions distributed on its inner sidewalls to slow down the gas flow rate. A butt block is fixedly welded to the bottom end of the buffer plate, and a butt groove is provided on the gas injection pipe to engage with the butt block.

[0011] In some embodiments, the gas mixing structure further includes a driving component, which consists of a motor and a fireproof motor housing. The driving component is fixedly installed on the top of the buffer plate, and a driving rod is fixedly installed at the output end of the driving component. The driving rod is rotatably installed below the buffer plate, and mixing plates are provided at equal angles on the outer circumference of the buffer plate.

[0012] In some embodiments, the mixing plate is made of metal and has mixing holes distributed on it.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an auxiliary ignition device for the FID detector of a gas chromatograph, which has the following beneficial effects:

[0014] 1. This utility model, through the electric valve and pressure relief valve in the air duct, allows for remote control to open the switch when igniting the ignition structure. The electric valve and pressure relief valve can be adjusted as needed to allow gas of appropriate flow rate and speed to quickly enter the detection duct. This gas then counteracts the mixed gas entering the detection duct below, suppressing the mixed gas near the ignition structure and increasing its concentration. This facilitates the ignition structure in igniting the gas to be tested and assists the igniter in ignition.

[0015] 2. The present invention, through its gas mixing structure, enables different gases to enter the gas injection pipe through the first and second gas injection pipes respectively. The inverted V-shaped buffer plate slows down the gas flow rate and improves the gas mixing efficiency. At the same time, the uniformly arranged diversion holes enable the gas to be further dispersed and mixed.

[0016] 3. This utility model, through the effects of the driving component, driving rod, and mixing plate, can achieve active dispersion and mixing of gas, further improving the gas mixing effect, and thus achieving the purpose of rapid ignition. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial half-sectional view of the present invention;

[0020] Figure 3 This is a schematic diagram of the gas mixing structure of this utility model;

[0021] Figure 4 This is a schematic diagram showing the position of the external thread of this utility model;

[0022] Figure 5 This is a schematic diagram showing the distribution of the protrusions in this utility model;

[0023] Figure 6 for Figure 2 Enlarged view of the structure at point A in the middle.

[0024] in:

[0025] 1. Inspection pipe; 2. Seal; 201. Sealing threaded sleeve; 202. Sealing ring; 3. Gas injection pipe; 4. First gas injection pipe; 5. Second gas injection pipe; 6. Gas mixing structure; 601. Buffer plate; 602. Diverter hole; 603. Protrusion; 604. Connecting block; 605. Driving component; 606. Driving rod; 607. Mixing plate; 608. Mixing hole; 7. Ignition structure; 8. Air pipe; 9. Electric valve; 10. Pressure relief valve; 11. Pressure gauge; 12. External thread. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figures 1-6This utility model provides a technical solution: an auxiliary ignition device for an FID detector in a gas chromatograph, comprising a detection pipe 1, a gas injection pipe 3 detachably connected to the lower end of the detection pipe 1 via a sealing element 2, a first gas injection pipe 4 and a second gas injection pipe 5 fixedly connected to the gas injection pipe 3, a gas mixing structure 6 detachably connected inside the gas injection pipe 3, an air pipe 8 connected near the upper end of the detection pipe 1, the air pipe 8 being arranged at an angle of 30°-60° to the detection pipe 1, air supplied inside the air pipe 8 being blown into the detection pipe 1 from top to bottom, an electric valve 9 and a pressure relief valve 10 detachably connected to the air pipe 8, a pressure gauge 11 detachably connected to the electric valve 9, an ignition structure 7 connected to the detection pipe 1, the ignition structure 7 integrating an igniter and a detector, the igniter being used to ignite the gas, and the detector being used for... The detection of the ignition gas composition is a conventional technical structure and will not be described in detail here. Detection pipe 1 is the connection point between the gas chromatograph's FID detector and the external gas delivery structure. The first gas injection pipe 4 can deliver the gas to be detected, while the second gas injection pipe 5 can optionally deliver auxiliary gas or no gas. Under normal use, the electric valve 9 is in a closed state. When air is delivered into the air pipe 8, the pressure gauge 11 can detect the gas pressure value inside the air pipe 8. When the pressure value reaches a suitable range, the external control device controls the electric valve 9 to operate. At this time, the high-pressure gas will quickly enter the interior of detection pipe 1, forming a countercurrent with the mixed gas entering the interior of detection pipe 1 below, suppressing the mixed gas near the ignition structure 7, increasing the concentration of the mixed gas near the ignition structure 7, and facilitating the ignition structure 7 to ignite the gas to be detected.

[0028] like Figure 6 As shown, external threads 12 are provided on the outer sides of the adjacent ends of the detection pipe 1 and the gas injection pipe 3. The sealing element 2 includes a sealing threaded sleeve 201 that is screwed into the external thread 12. The sealing element 2 also includes a sealing ring 202. The sealing ring 202 is fixedly installed below the detection pipe 1. An annular groove matching the sealing ring 202 is provided in the gas injection pipe 3. The sealing ring 202 is inserted into the annular groove so that when the detection pipe 1 and the gas injection pipe 3 are connected, the sealing ring 202 and the annular groove can achieve preliminary isolation of the gas. At the same time, by turning the sealing threaded sleeve 201, the gap between the detection pipe 1 and the gas injection pipe 3 can be isolated, thereby improving the sealing effect of the detection pipe 1 and the gas injection pipe 3.

[0029] Example 2: Figure 3As shown, the gas mixing structure 6 includes a buffer plate 601, which is inverted V-shaped and used to reduce the gas flow velocity. The buffer plate 601 has diversion holes 602 distributed on both sides to facilitate the introduction of gas from the first gas injection pipe 4 and the second gas injection pipe 5 into the gas injection pipe 3. At this time, the inverted V-shaped buffer plate 601 can reduce the gas flow velocity, thereby achieving the mixing effect of different gases.

[0030] Example 3: As Figure 5 As shown, based on the second embodiment, in order to further reduce the gas flow rate, protrusions 603 are distributed on the relatively inner sidewalls of the buffer plate 601. The protrusions 603 are used to slow down the gas flow rate. A connecting block 604 is fixedly welded to the bottom end of the buffer plate 601. A connecting groove is opened on the gas injection pipe 3 to engage with the connecting block 604, so as to further increase the gas flow formation and reduce the gas flow rate through the arc-shaped protrusions 603. At the same time, the connection between the connecting block 604 and the connecting groove can achieve the effect of fixing the buffer plate 601.

[0031] like Figure 5 As shown, the gas mixing structure 6 also includes a driving component 605, which consists of a motor and a fireproof motor housing. The driving component 605 is fixedly installed on the top of the buffer plate 601. A driving rod 606 is fixedly installed at the output end of the driving component 605. The driving rod 606 is rotatably installed below the buffer plate 601. A mixing plate 607 is provided at equal angles on the outer circumference of the buffer plate 601. The mixing plate 607 is made of metal and has mixing holes 608 distributed on it. It should be noted that the driving component 605 consists of a servo motor, a fireproof motor housing, and a battery (not shown in the figure). Therefore, by opening the driving component 605, the driving component 605 can drive the driving rod 606 to rotate. At this time, the gas can be further mixed through the mixing plate 607, thereby greatly improving the gas mixing effect and improving the practicality of the device.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auxiliary ignition device for a gas chromatograph FID detector, comprising a detection conduit (1), characterized in that: The lower end of the detection pipe (1) is detachably connected to an injection pipe (3) via a seal (2). A first injection pipe (4) and a second injection pipe (5) are fixedly connected to the injection pipe (3). A gas mixing structure (6) is detachably connected inside the injection pipe (3). An air pipe (8) is connected to the upper end of the detection pipe (1). An electric valve (9) and a pressure relief valve (10) are detachably connected to the air pipe (8). A pressure gauge (11) is detachably connected to the electric valve (9). An ignition structure (7) is connected to the detection pipe (1).

2. The auxiliary ignition device for the FID detector of a gas chromatograph according to claim 1, characterized in that: Both the detection pipe (1) and the gas injection pipe (3) have external threads (12) on their adjacent ends. The sealing element (2) includes a sealing threaded sleeve (201) that is screwed into the external thread (12).

3. The auxiliary ignition device for the FID detector of a gas chromatograph according to claim 1, characterized in that: The sealing element (2) also includes a sealing ring (202), which is fixedly installed below the detection pipe (1). The gas injection pipe (3) has an annular groove that matches the sealing ring (202), and the sealing ring (202) is inserted into the annular groove.

4. The auxiliary ignition device for the FID detector of a gas chromatograph according to claim 3, characterized in that: The gas mixing structure (6) includes a buffer plate (601), which is inverted V-shaped and is used to reduce the gas flow rate. Diversion holes (602) are distributed on both sides of the buffer plate (601).

5. The auxiliary ignition device for a gas chromatograph FID detector according to claim 4, characterized in that: The buffer plate (601) has protrusions (603) distributed on its inner sidewalls. The protrusions (603) are used to slow down the gas flow rate. The bottom end of the buffer plate (601) is fixedly welded with a docking block (604). The gas injection pipe (3) has a docking groove that engages with the docking block (604).

6. The auxiliary ignition device for the FID detector of a gas chromatograph according to claim 4, characterized in that: The gas mixing structure (6) also includes a driving component (605), which is composed of a motor and a fireproof motor housing. The driving component (605) is fixedly installed on the top of the buffer plate (601). A driving rod (606) is fixedly installed at the output end of the driving component (605). The driving rod (606) is rotatably installed below the buffer plate (601). A mixing plate (607) is provided at equal angles on the outer circumference of the buffer plate (601).

7. The auxiliary ignition device for the FID detector of a gas chromatograph according to claim 6, characterized in that: The mixing plate (607) is made of metal, and mixing holes (608) are distributed on the mixing plate (607).

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