Gas chromatography FID detector

Abstract

The utility model relates to the technical field of gas chromatography detection equipment, and discloses a gas chromatography FID (Flame Ionization Detector), which comprises a detection table, an FID detection component is fixedly arranged on the upper surface of the detection table, an air inlet grille is fixedly arranged in a vertical plate of the detection table, a dustproof mechanism is arranged on the air inlet grille, and the air inlet grille is fixedly connected with the detection table. The dustproof mechanism comprises a motor, a supporting rod, a sliding roller, a lantern ring, a vertical plate and a fixed roller, intelligent opening and closing of the air inlet grille are achieved through the dustproof mechanism composed of the motor, the supporting rod, the sliding roller, the lantern ring, the vertical plate, the fixed roller, the fixed plate, the rotating roller and the baffle, when an instrument works, the supporting rod is driven by the motor to rotate, reciprocating motion of the vertical plate is converted through the sliding roller and the lantern ring, and the air inlet grille is opened and closed. The fixed roller and the rotating roller are driven to open the baffle, stable supply of airflow is guaranteed, the baffle is closed during shutdown, dust and impurities are prevented from entering, the structure guarantees clean airflow needed by the FID detection assembly, part pollution is reduced, and the maintenance period is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas chromatography detection equipment technical field, concretely is gas chromatography FID detector. BACKGROUND

[0002] As a kind of efficient separation and analysis technique, gas chromatography is widely used in chemical industry, environmental protection, food detection and other fields, among them, hydrogen flame ionization detector becomes one of the core components in gas chromatography detection equipment due to the advantages of high sensitivity, fast response speed, wide linear range, etc., FID detector needs to rely on stable air flow as combustion-supporting agent when working, and at the same time, external impurity interference detection process needs to be avoided, therefore, the air intake system design and internal cable management of detector directly affect detection precision and equipment service life.

[0003] To guarantee heat dissipation and combustion-supporting requirement, FID detector is usually provided with air inlet grille at detection table vertical plate, but traditional air inlet grille is open structure, lacks effective dustproof mechanism, after instrument shutdown, external dust and particulate matter are easy to enter the inside of detection table through grid hole, adhere to the surface of the key components such as combustion head and ion collecting electrode of FID detection assembly, not only can cause detection signal drift, sensitivity decline, but also can accelerate component corrosion and aging, shorten equipment maintenance cycle, increase use cost, if passive protection structure such as detachable dust cover is used, manual frequent disassembly and assembly are needed, operation is tedious and can affect detection efficiency, in view of this, gas chromatography FID detector is presented. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of prior art, the utility model provides gas chromatography FID detector, solves the problem of poor heat dissipation effect of gas chromatography FID detector.

[0005] To achieve the above object, the utility model provides the following technical scheme: gas chromatography FID detector, including detection table, the upper surface of detection table is fixedly installed with FID detection assembly, the vertical plate in detection table is fixedly installed with air inlet grille;

[0006] Among them, dustproof mechanism is arranged on air inlet grille, dustproof mechanism includes motor, support rod, sliding roller, collar, vertical plate, fixed roller, fixed plate, rotating roller and baffle;

[0007] Among them, motor is fixedly installed on the upper surface of air inlet grille, support rod is fixedly sleeved on the outer surface of motor output shaft, sliding roller is rotatably sleeved on the inner surface of support rod.

[0008] Preferably, the collar is slidably sleeved on the outer surface of sliding roller, and the vertical plate is fixedly installed on the lower surface of the collar.

[0009] Among them, two fixed rollers are rotatably sleeved on the inner surface of vertical plate.

[0010] Preferably, the two fixing plates are respectively rotationally sleeved on the outer surfaces of the two fixing rollers, and the two rotating rollers are respectively fixedly sleeved on the inner surfaces of the two fixing plates and rotationally connected in the inner wall of the air inlet grille.

[0011] Preferably, the two baffles are respectively fixedly sleeved on the outer surfaces of the two rotating rollers.

[0012] Preferably, two wire arranging frames are fixedly installed in the detection bench housing, and the right surfaces of the two wire arranging frames are respectively provided with a sliding groove.

[0013] The inner walls of the two sliding grooves are rotationally connected with bidirectional threaded rods, the upper ends of the two bidirectional threaded rods respectively penetrate through the upper surfaces of the two wire arranging frames, and the upper ends of the two bidirectional threaded rods are fixedly connected with knobs.

[0014] The outer surfaces of the two bidirectional threaded rods are respectively threadedly sleeved with two wire clamps, and the two wire clamps are respectively connected with the two sliding grooves in a sliding mode.

[0015] Compared with the prior art, the utility model provides a gas chromatograph FID detector, has the following beneficial effects:

[0016] 1、The dustproof mechanism of the gas chromatograph FID detector is composed of a motor, a supporting rod, a sliding roller, a sleeve ring, a vertical plate, a fixing roller, a fixing plate, a rotating roller and a baffle, realizes the intelligent opening and closing of the air inlet grille, when the instrument works, the motor drives the supporting rod to rotate, the vertical plate reciprocating motion is converted through the sliding roller and the sleeve ring, drives the fixing roller and the rotating roller to open the baffle, guarantees the stable supply of airflow, and the baffle is closed when the machine stops, preventing dust and impurities from entering, the structure not only ensures the clean airflow required by the FID detection assembly, but also reduces the pollution of parts and prolongs the maintenance period.

[0017] 2、The two wire arranging frames in the detection bench of the gas chromatograph FID detector cooperate with the sliding groove, the bidirectional threaded rod, the knob and the wire clamp, realize the orderly management of the cable, rotate the knob to drive the bidirectional threaded rod to rotate, make the wire clamp move towards or away from each other along the sliding groove, can adapt to different thick cables, this design avoids the signal interference caused by the disorderly winding of the cable, reduces the wear and tear risk of the line, at the same time, is convenient for later maintenance, guarantees the stable signal transmission of the FID detection assembly, and improves the overall equipment operation reliability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the utility model gas chromatograph FID detector;

[0019] Figure 2 It is a structure schematic view of the utility model FID detection assembly;

[0020] Figure 3 It is a structure schematic view of the utility model detection bench;

[0021] Figure 4 It is the internal structure schematic view of the detection table of the utility model;

[0022] Figure 5 It is the utility model Figure 4 The structure enlarged view of A place in the middle;

[0023] Figure 6 It is the wire arrangement frame structure schematic view of the utility model.

[0024] In the drawing: 1, detection table; 2, FID detection assembly; 3, air inlet grille; 4, motor; 5, support rod; 6, sliding roller; 7, sleeve ring; 8, vertical plate; 9, fixed roller; 10, fixed plate; 11, rotating roller; 12, baffle; 13, wire arrangement frame; 14, sliding groove; 15, two-way threaded rod; 16, knob; 17, wire clamp. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0026] Please refer to Figures 1-6 The utility model provides a new technical scheme: gas chromatography FID detector, including detection table 1, the upper surface of detection table 1 is fixedly installed with FID detection assembly 2, the vertical plate in detection table 1 is fixedly installed with air inlet grille 3;

[0027] Wherein, the dustproof mechanism is arranged on the air inlet grille 3, and the dustproof mechanism includes a motor 4, a support rod 5, a sliding roller 6, a sleeve ring 7, a vertical plate 8, a fixed roller 9, a fixed plate 10, a rotating roller 11 and a baffle 12.

[0028] Wherein, the motor 4 is fixedly installed on the upper surface of the air inlet grille 3, the support rod 5 is fixedly sleeved on the outer surface of the output shaft of the motor 4, and the sliding roller 6 is rotatably sleeved on the inner surface of the support rod 5.

[0029] Further, the sleeve ring 7 is slidably sleeved on the outer surface of the sliding roller 6, and the vertical plate 8 is fixedly installed on the lower surface of the sleeve ring 7.

[0030] Wherein, the two fixed rollers 9 are rotatably sleeved on the inner surface of the vertical plate 8.

[0031] Further, the two fixed plates 10 are rotatably sleeved on the outer surfaces of the two fixed rollers 9, the two rotating rollers 11 are fixedly sleeved on the inner surfaces of the two fixed plates 10, and the two rotating rollers 11 are rotatably connected in the inner wall of the air inlet grille 3.

[0032] Further, two baffles 12 are respectively fixedly sleeved on the outer surfaces of the two rotating rollers 11.

[0033] Further, two wire arranging frames 13 are fixedly installed in the shell of the detection table 1, and the right surfaces of the two wire arranging frames 13 are each provided with a sliding groove 14;

[0034] The inner walls of the two sliding grooves 14 are each rotationally connected with a bidirectional threaded rod 15, the upper ends of the two bidirectional threaded rods 15 are respectively penetrated through the upper surfaces of the two wire arranging frames 13, and the upper ends of the two bidirectional threaded rods 15 are each fixedly connected with a knob 16.

[0035] The outer surfaces of the two bidirectional threaded rods 15 are each threadedly sleeved with a wire clamp 17, and the two wire clamps 17 are respectively in sliding connection with the two sliding grooves 14.

[0036] Structural explanation: The detection table 1 is the basic support structure of the whole FID detector assembly, which plays a role in bearing and fixing the core components, and its outer surface is fixedly installed with the FID detection assembly to provide a stable installation platform for the detection function; the inner surface of the vertical plate is fixedly installed with the air inlet grille 3, and the shell is also installed with the wire arranging frame 13, which integrates the functions of detection, air inlet and cable arrangement, and guarantees the stability of the overall structure and the coordination of functions.

[0037] The FID detection assembly 2 is the core component for realizing sample component detection by the gas chromatograph, which works on the principle of hydrogen flame ionization, and the sample is ionized in the hydrogen flame after being separated by the chromatographic column, and the generated ions form an electric current signal under the action of an electric field, so that qualitative and quantitative analysis of the components in the sample can be realized through signal processing, thereby determining the accuracy and sensitivity of the detection results.

[0038] The air inlet grille 3 mainly provides stable and clean air flow for the FID detection assembly, and the air is not only a combustion-supporting agent for the hydrogen flame, but also can dilute sample components and carry away combustion products, and the stable supply directly affects the stability of the flame and the detection baseline, at the same time, the grid structure facilitates uniform airflow and provides an installation carrier for the dustproof mechanism, thereby guaranteeing the cleanliness of the air inlet.

[0039] The motor 4 is the power source of the dustproof mechanism, which provides power for the movement of the subsequent components through the rotation of the output shaft, and the motor 4 is fixed on the upper surface of the air inlet grille 3, which drives the support rod 5 to rotate synchronously during work, and then converts the rotary motion into reciprocating motion of the sleeve ring 7 through the cooperation of the support rod 5 and the sliding roller 6, so as to drive the baffle 12 to open and close and control the working state of the dustproof mechanism.

[0040] Supporting rod 5: play a bridge role of power transmission and motion conversion, fixedly sleeved on the outer surface of the output shaft of motor 4, synchronously rotates with the rotation of motor 4, the inner surface of supporting rod 5 rotatably sleeves sliding roller 6, in the process of self-rotation, through the sliding cooperation of sliding roller 6 and sleeve ring 7, the circumferential motion of supporting rod 5 is converted into the linear reciprocating motion of sleeve ring 7 in a specific direction, to provide a transmission path for the action of the dustproof mechanism.

[0041] Sliding roller 6: the core role is to reduce the friction between the moving parts, to ensure smooth action of the dustproof mechanism, rotatably sleeved on the inner surface of supporting rod 5, the outer surface is in sliding contact with sleeve ring 7, when supporting rod 5 drives sliding roller 6 to rotate, sliding roller 6 can convert the sliding friction between supporting rod 5 and sleeve ring 7 into rolling friction through self-rotation, to reduce the wear of the parts, and to ensure that sleeve ring 7 can stably reciprocate.

[0042] Sleeve ring 7: is a motion transmission component in the dustproof mechanism, slidingly sleeved on the outer surface of sliding roller 6, the lower surface is fixedly connected with vertical plate 8, under the drive of sliding roller 6, sleeve ring 7 can do reciprocating linear motion along the axial direction of sliding roller 6, at the same time, the linear motion of sleeve ring 7 is transmitted to the vertical plate 8 below, to drive the vertical plate 8 to move synchronously, and then to drive fixed roller 9 to rotate, to provide direct power for the opening and closing of baffle 12.

[0043] Vertical plate 8: mainly functions to connect sleeve ring 7 and fixed roller 9, to realize longitudinal transmission of motion, fixedly installed on the lower surface of sleeve ring 7, the inner surface rotatably sleeves two fixed rollers 9, when sleeve ring 7 drives vertical plate 8 to reciprocate, vertical plate 8 converts the linear motion into the rotational motion of fixed roller 9 through the rotational cooperation with fixed roller 9, at the same time, ensures the coaxiality and stability of fixed roller 9 when rotating, to ensure that the subsequent baffle 12 moves synchronously.

[0044] Fixed roller 9: is an execution transmission component of the dustproof mechanism, rotatably sleeved on the inner surface of vertical plate 8, to receive the power transmitted by vertical plate 8 and rotate; on the other hand, fixedly sleeved on the inner surface of fixed plate 10, and rotatably connected to the inner wall of air inlet grille 3, to drive the baffle 12 fixed on the outer surface to rotate synchronously when rotating, to realize the opening and closing of baffle 12 through self-rotation, and then to control the dustproof state of air inlet grille 3.

[0045] Fixed plate 10: mainly functions to fix and limit, rotatably sleeved on the outer surfaces of two fixed rollers 9, at the same time, cooperates with the inner wall of air inlet grille 3, to position the installation position of fixed roller 9, fixed plate 10 can limit the axial displacement of fixed roller 9, to ensure that fixed roller 9 only rotates around its own axis, to avoid the dislocation of baffle 12 caused by the deviation of fixed roller 9, and to ensure the reliable work of the dustproof mechanism.

[0046] Rotary roller 11: is a component that assists the rotation of the fixed roller 9, or is used to support and guide the movement of the vertical plate 8, reduce the friction between the vertical plate 8 and other components, and through the rotation characteristics, assist in optimizing the movement accuracy of the dust prevention mechanism, avoid component jamming, and ensure the smoothness and stability of the fixed roller 9 driving the baffle 12 action.

[0047] Baffle 12: is the core execution component of the dust prevention mechanism, fixedly sleeved on the outer surface of the fixed roller 9, rotates with the fixed roller 9 to realize the opening and closing action, when the gas chromatograph is not working, the baffle 12 closes to block the grid holes of the air inlet grille 3, prevents external dust and impurities from entering the inside of the air inlet grille 3, and avoids pollution of the FID detection assembly; when the instrument is working, the baffle 12 is opened, which does not affect the normal airflow, and guarantees the detection requirement.

[0048] Cable management rack 13: is a cable arrangement component in the shell of the detection table 1, mainly functions to accommodate and fix the connection cables of the FID detector assembly and other related components, through orderly arrangement of the cables, signal interference, line wear or maintenance inconvenience caused by tangled cables can be avoided, the internal wiring of the instrument is guaranteed to be standardized, and the overall safety and maintenance convenience of the assembly are improved.

[0049] Chute 14: is provided on the right surface of the cable management rack 13, and provides a sliding track for the cable clamp 17, the inner wall of which cooperates with the bidirectional threaded rod 15, while limiting the movement direction of the cable clamp 17, to ensure that the cable clamp 17 only moves linearly along the axial direction of the chute 14 under the drive of the bidirectional threaded rod 15, and the position of the cable clamp is accurately adjustable.

[0050] Bidirectional threaded rod 15: is the core component for adjusting the position of the cable clamp on the cable management rack 13, is rotationally connected to the inner wall of the chute 14, penetrates the cable management rack 13 at the upper end and is connected with the knob 16, and the outer surface thereof is provided with bidirectional threads which are threadedly connected with the two cable clamps 17. When the knob 16 drives the rotation thereof, the bidirectional threads can drive the two cable clamps 17 to move towards or away from each other along the chute 14, to realize clamping and fixing of cables with different diameters.

[0051] Knob 16: is a manual control component of the bidirectional threaded rod 15, is fixedly connected to the upper end of the bidirectional threaded rod 15, and through rotating the knob 16, an operator can easily drive the bidirectional threaded rod 15 to rotate synchronously, without the need for additional tools, so as to facilitate quick adjustment of the position of the cable clamp 17, and the design improves the operation convenience of the cable management rack 13, and the cable clamping tightness and position can be flexibly adjusted according to the actual arrangement requirement of the cable.

[0052] The line clamp 17 is a component for clamping the cable directly in the wire arranging frame 13, is sleeved on the outer surface of the bidirectional threaded rod 15, and is in sliding connection with the sliding groove 14. Under the driving of the bidirectional threaded rod 15, the two line clamps 17 can move towards or away from each other along the sliding groove 14, and the clamping and fixing of the cable are realized through cooperation of the two line clamps 17. The line clamp 17 can avoid displacement of the cable due to vibration during operation of the instrument, ensure stable connection of the line, and reduce signal interference.

[0053] Working principle: the motor 4 drives the supporting rod 5 to rotate synchronously after starting, the supporting rod 5 is sleeved with the sliding roller 6 and the sleeve ring 7 through sliding cooperation, converts the circular motion into the linear reciprocating motion of the sleeve ring 7, the sleeve ring 7 drives the fixed vertical plate 8 on the lower surface to move synchronously, the vertical plate 8 converts the linear motion into the rotating motion of the fixed roller 9 through rotating cooperation with the fixed roller 9; the fixed baffle 12 on the outer surface is driven by the fixed roller 9 to rotate synchronously with the rotating roller 11, the baffle 12 is opened during operation of the instrument, clean air flow is supplied to the FID detection assembly 2 through the air inlet grille 3, the baffle 12 is closed to prevent dust during shutdown of the instrument, the bidirectional threaded rod 15 is rotated by rotating the knob 16, the two line clamps 17 move towards or away from each other along the sliding groove 14 due to the threaded cooperation between the bidirectional threaded rod 15 and the line clamp 17 and the sliding of the line clamp 17 along the sliding groove 14, clamping and fixing of the cable with different diameters are realized, and interference is avoided.

[0054] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gas chromatograph FID detector comprising a detection stage (1), characterised in that: The upper surface of the detection platform (1) is fixedly installed with an FID detection assembly (2), and the vertical plate of the detection platform (1) is fixedly installed with an air inlet grille (3); Wherein, the air inlet grille (3) is provided with a dust prevention mechanism, the dust prevention mechanism comprises a motor (4), a supporting rod (5), a sliding roller (6), a sleeve ring (7), a vertical plate (8), a fixed roller (9), a fixed plate (10), a rotating roller (11) and a baffle (12); Wherein, the motor (4) is fixedly installed on the upper surface of the air inlet grille (3), the supporting rod (5) is fixedly sleeved on the outer surface of the output shaft of the motor (4), and the sliding roller (6) is rotatably sleeved on the inner surface of the supporting rod (5).

2. The gas chromatography FID detector of claim 1, wherein: The sleeve ring (7) is slidably sleeved on the outer surface of the sliding roller (6), and the vertical plate (8) is fixedly installed on the lower surface of the sleeve ring (7); Wherein, two fixed rollers (9) are rotatably sleeved on the inner surface of the vertical plate (8).

3. The gas chromatography FID detector of claim 1, wherein: Two fixed plates (10) are rotatably sleeved on the outer surfaces of the two fixed rollers (9), two rotating rollers (11) are fixedly sleeved on the inner surfaces of the two fixed plates (10), and the two rotating rollers (11) are rotatably connected in the inner wall of the air inlet grille (3).

4. The gas chromatography FID detector of claim 1, wherein: Two baffles (12) are fixedly sleeved on the outer surfaces of the two rotating rollers (11).

5. The gas chromatography FID detector of claim 1, wherein: Two cable management frames (13) are fixedly installed in the shell of the detection platform (1), and the right surfaces of the two cable management frames (13) are both provided with a sliding groove (14); Wherein, the inner wall of the two sliding grooves (14) is rotatably connected with a bidirectional screw rod (15), the upper end of the two bidirectional screw rods (15) penetrates out of the upper surface of the two cable management frames (13) respectively, and the upper end of the two bidirectional screw rods (15) is fixedly connected with a knob (16); Wherein, the outer surfaces of the two bidirectional screw rods (15) are both threadedly sleeved with two wire clamps (17), and the two wire clamps (17) are respectively connected with the two sliding grooves (14).

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