Wide-range laboratory universal type hydrogen flame ionization detector

Abstract

The utility model discloses a wide-range laboratory universal type hydrogen flame ionization detector in the technical field of detectors, which comprises a shell, the interior of the shell is hollow, the interior of the shell is fixedly connected with an FID main body, the top end of the FID main body is fixedly connected with an FID nozzle head, and the outer wall of the bottom end of the FID main body is fixedly connected with a heating block main body. The top of the shell is fixedly connected with a collection shell, a collector is arranged in the collection shell, one end of the collection shell is fixedly connected with a high-voltage line in a penetrating manner, the top of the collection shell is fixedly connected with a top block, and an air outlet is formed in the outer wall of the top end of one end, close to the high-voltage line, of the top block in a penetrating manner; the outer wall of the end, away from the high air outlet, of the shell is fixedly connected with a connecting pipe. Through the overall design of the structure, the overall structure of the device is compact, meanwhile, the sensitivity of the detector is improved, the requirement for polarization voltage is low, the size is small, installation is convenient, durability is high, and the actual use effect of the detector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detectors, in particular to a universal hydrogen flame ionization detector for wide-range laboratories. Background Art

[0002] Flame ionization detector is a highly sensitive general purpose detector. It is suitable for separating complex samples by connecting an open column. The linear range is 10 to the 7th power. It is one of the most sensitive methods for hydrocarbons in gas chromatography detectors and is widely used for the detection of volatile hydrocarbons and many carbon compounds.

[0003] The FID detector of the existing technology has low response sensitivity, narrow range and high polarization voltage for high concentration of organic matter, which cannot meet the requirements of some laboratories for full range. Now, through precise structural design and combining the basic principles of the detector, we have designed a small-volume FID detector with high precision, compact structure, full range, high sensitivity and low voltage. Utility Model Content

[0004] The purpose of the utility model is to provide a universal hydrogen flame ionization detector for laboratories with a wide range. By designing the overall structure, the overall structure of the device is compact. At the same time, the sensitivity of the detector is improved, the polarization voltage requirement is low, the volume is small, the installation is convenient, the durability is high, and the actual use effect of the detector is improved, so as to solve the problem that the FID detector of the prior art proposed in the above background technology has low response sensitivity, narrow range, and high polarization voltage for high concentration of organic matter, and cannot meet the requirements of some laboratory occasions with full range. Now, through precise structural design and combining the basic principles of the detector, we have designed a small-volume FID detector with high precision, exquisite structure, and full range, high sensitivity, and low voltage.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a universal hydrogen flame ionization detector for wide-range laboratories, comprising a shell, the interior of the shell being hollow, the interior of the shell being fixedly connected with an FID body, the top of the FID body being fixedly connected with an FID nozzle head, the bottom outer wall of the FID body being fixedly connected with a heating block body, the top of the shell being fixedly connected with a collecting shell, the interior of the collecting shell being provided with a collecting electrode, one end of the collecting shell being penetrated and fixedly connected with a high-voltage line, the top of the collecting shell being fixedly connected with a top block, the top outer wall of the top block being close to one end of the high-voltage line being penetrated with an air outlet, and the outer wall of the shell at one end away from the air outlet being penetrated and fixedly connected with a connecting pipe.

[0006] As a further solution of the utility model: the inner wall of the collecting shell is fixedly connected with a collecting electrode cover, the collecting electrode is fixed to the inner wall of the collecting electrode cover, and the inner wall of the collecting shell at the bottom end of the collecting electrode is fixedly connected with a collecting electrode bottom sleeve.

[0007] As a further solution of the utility model: a high-voltage rod is provided through the outer wall of the shell located at the bottom end of the high-voltage line, and an adapter is fixedly connected through the bottom of the shell.

[0008] As a further solution of the utility model: the top of the adapter passes through the shell and is fixedly connected to the bottom of the FID body.

[0009] As a further solution of the utility model: the bottom of the collecting electrode is arranged on the top of the FID nozzle head.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, by designing the overall structure, the overall structure of the equipment is compact. At the same time, the sensitivity of the detector is improved, the polarization voltage requirement is low, the size is small, the installation is convenient, the durability is high, and the actual use effect of the detector is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of a universal hydrogen flame ionization detector for wide-range laboratories of the utility model;

[0012] Figure 2 It is a cross-sectional structural schematic diagram of a universal hydrogen flame ionization detector for wide-range laboratories of the utility model;

[0013] Figure 3 The utility model is a side view structural schematic diagram of a wide-range laboratory universal hydrogen flame ionization detector.

[0014] In the figure: 1. outer shell; 2. collecting shell; 3. top block; 4. air outlet; 5. high-voltage wire; 6. high-voltage rod; 7. connecting pipe; 8. adapter; 9. collecting electrode cover; 10. collecting electrode; 11. collecting electrode bottom sleeve; 12. F ID nozzle head; 13. F ID main body; 14. heating block main body. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0017] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figures 1 to 3 In the embodiment of the utility model, a wide-range laboratory universal hydrogen flame ionization detector includes a shell 1, the interior of the shell 1 is hollow, an F ID body 13 is fixedly connected to the interior of the shell 1, an F ID nozzle head 12 is fixedly connected to the top of the F ID body 13, a heating block body 14 is fixedly connected to the bottom outer wall of the F ID body 13, a collecting shell 2 is fixedly connected to the top of the shell 1, a collecting electrode 10 is arranged inside the collecting shell 2, a high-voltage line 5 is penetrated and fixedly connected to one end of the collecting shell 2, a top block 3 is fixedly connected to the top of the collecting shell 2, an air outlet 4 is penetrated and opened on the top outer wall of the top block 3 near the high-voltage line 5, and a connecting pipe 7 is penetrated and fixedly connected to the outer wall of the shell 1 at the end away from the high air outlet 4.

[0020] See also Figure 2In this embodiment, the collecting shell 2 is arranged on the top of the shell 1, and the interior of the collecting card shell 2 is hollow, which is convenient for the installation of the internal collecting electrode 10 and other components. At the same time, the interior of the collecting shell 2 is connected with the internal hollow cavity of the shell 1 to ensure that the collecting electrode 10 can directly receive the ejected gas from the FID nozzle head 12. The bottom of the collecting electrode 10 is arranged in a downward trumpet shape to increase the receiving range.

[0021] Meanwhile, in this embodiment, a plurality of connecting tubes 7 are provided, and one end of the connecting tube 7 passes through the housing 1 and is connected to the entrance end of the FID body 13. When gas enters, the gas is introduced into the FID body 13 through the connecting tube 7 to ensure the detection effect.

[0022] As an improved solution of the present invention, the heating block body 14 adopts an electric heating block, which is heated by external power supply.

[0023] A collector cover 9 is fixedly connected to the inner wall of the collecting shell 2 , a collector 10 is fixed to the inner wall of the collector cover 9 , and a collector bottom sleeve 11 is fixedly connected to the inner wall of the collecting shell 2 at the bottom end of the collector 10 .

[0024] A high-voltage rod 6 is provided through the outer wall of the housing 1 at the bottom end of the high-voltage line 5 , and an adapter 8 is fixedly connected through the bottom of the housing 1 .

[0025] The top of the adapter 8 passes through the housing 1 and is fixedly connected to the bottom of the FID body 13 .

[0026] The bottom of the collector 10 is disposed on the top of the FID nozzle head 12 .

[0027] The working principle of the utility model is: when organic matter passes through the detector, ions will be generated in the flame. Under the action of polarization voltage, the current between the nozzle and the collector will increase. The corresponding spectrum can be obtained by detecting and recording the current signal. Generally, organic compounds respond to F ID. Generally, the higher the molecular weight, the higher the sensitivity.

[0028] The hydrogen flame ionization detector uses hydrogen as the combustion gas, mixed with helium, nitrogen and other eluents, and burns at the nozzle of a cylindrical electrode. The voltage between the nozzle and the electrode is as high as several hundred volts. It is one of the most sensitive gas chromatography detectors for hydrocarbons (such as butane and hexane) and is widely used to detect volatile hydrocarbons and many carbon-containing compounds.

[0029] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0030] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A wide-range laboratory universal hydrogen flame ionization detector, comprising a housing (1), characterized in that: The interior of the shell (1) is hollow, the interior of the shell (1) is fixedly connected to an FID body (13), the top of the FID body (13) is fixedly connected to an FID nozzle head (12), the bottom outer wall of the FID body (13) is fixedly connected to a heating block body (14), the top of the shell (1) is fixedly connected to a collecting shell (2), a collecting pole (10) is arranged inside the collecting shell (2), one end of the collecting shell (2) is penetrated and fixedly connected to a high-voltage line (5), the top of the collecting shell (2) is fixedly connected to a top block (3), the top outer wall of the top block (3) close to the high-voltage line (5) is penetrated and provided with an air outlet (4), and the outer wall of the shell (1) away from the high air outlet (4) is penetrated and fixedly connected to a connecting pipe (7).

2. The wide-range laboratory universal hydrogen flame ionization detector according to claim 1, characterized in that: The inner wall of the collecting shell (2) is fixedly connected to a collecting electrode cover (9), the collecting electrode (10) is fixed to the inner wall of the collecting electrode cover (9), and the inner wall of the collecting shell (2) located at the bottom end of the collecting electrode (10) is fixedly connected to a collecting electrode bottom sleeve (11).

3. The wide-range laboratory universal hydrogen flame ionization detector according to claim 1, characterized in that: A high-voltage rod (6) is provided through the outer wall of the housing (1) at the bottom end of the high-voltage line (5), and an adapter (8) is fixedly connected through the bottom of the housing (1).

4. The wide-range laboratory universal hydrogen flame ionization detector according to claim 3, characterized in that: The top of the adapter (8) passes through the housing (1) and is fixedly connected to the bottom of the FID body (13).

5. The wide-range laboratory universal hydrogen flame ionization detector according to claim 1, characterized in that: The bottom of the collecting electrode (10) is arranged on the top of the FID nozzle head (12).

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