CN213933684U

CN213933684U - FID detector

Info

Publication number: CN213933684U
Application number: CN202023088435.6U
Authority: CN
Inventors: 吕磊; 张友国; 杨崇新; 陶锡
Original assignee: Qingdao Minghua Electronic Instrument Co ltd
Current assignee: Qingdao Minghua Electronic Instrument Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-10
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a FID detector belongs to portable or online non-methane analytical instrument of methane design and manufacture field. The FID detector includes: the ionization part and the ignition part are positioned at two ends of the polarization part; wherein the polarization part includes: a first housing; a collector located inside the first housing and separated from the first housing by an insulator; the signal wire is wound on the collecting electrode and is abutted against the circumferential surface of the collecting electrode through a positioning piece. The utility model provides a line ball structure of current FID detector insecure lead to the relatively poor problem of signal acquisition stability.

Description

FID detector

Technical Field

The utility model relates to a portable or online non-methane analytical instrument of methane field, in particular to FID detector.

Background

A FID (flame ionization detector) is a high-sensitivity universal detector, and is characterized in that a flame generated by combustion of hydrogen and air is used as an energy source, when organic compounds enter the flame generated by combustion of the hydrogen and the oxygen, chemical ionization is generated at high temperature, ions higher than a base flow by several orders of magnitude are generated by ionization, an ion flow is formed under the directional action of a high-voltage electric field, and the weak ion flow is amplified through high resistance to become an electric signal in direct proportion to the amount of the organic compounds entering the flame, so that the organic compounds can be quantitatively analyzed according to the size of the signal. It responds to almost all organic substances, but to inorganic substances, inert gases or non-dissociative substances in the flame, etc., with little or no response.

In a traditional FID detector, most signal wires are multicore coaxial signal wires, the signal wires are fixed on a collector of the detector through a set screw, core wires are easily broken after the set screw is compressed, most coaxial signal wires are hard wires, after the coaxial signal wires are bent outside, a part of core wires are also easily broken due to internal multi-core wires, ionization signals of hydrogen flames collected by the signal wires are unstable, and the stability of signal collection of an instrument is affected; in addition, because the multicore wire department that holding screw pressed still needs to press line with copper line nose, and holding screw actually presses on the copper line nose, and the copper line nose is likely to cause the heart yearn to open circuit when pressing the multicore wire, also causes contact failure easily, influences the stability of the signal acquisition of instrument.

Disclosure of Invention

The to-be-solved technical problem of the utility model is that the line ball structure of current FID detector is insecure leads to the relatively poor problem of signal acquisition stability, for this reason, the utility model provides a better FID detector of signal acquisition stability.

To the technical problem mentioned above, the utility model provides a following technical scheme:

an FID detector, comprising: the ionization part and the ignition part are positioned at two ends of the polarization part; wherein the polarization part includes: a first housing; a collector located inside the first housing and separated from the first housing by an insulator; the first signal wire is wound on the collector and is abutted against the circumferential surface of the collector through a positioning piece.

In some embodiments of the present invention, the insulating member includes a first insulating member and a second insulating member, the first insulating member and the second insulating member are respectively located on two sides of the positioning member.

The utility model discloses an among the partial implementation, the setting element is the ring shape current conducting plate that has the opening, the constant head tank is seted up on its internal global to the setting element, first signal line is located in the constant head tank.

The utility model discloses an among the partial implementation mode, the collector sets up the outer edge of annular, the constant head tank intercommunication extremely on a side end face of setting element, the setting element will first signal line support press in the collector on the surface and the outer peripheral face on the outer edge of annular.

In some embodiments of the present invention, the first signal line is a single-core coaxial signal line.

In some embodiments, the polarization part further includes a first signal line protection shell, the first signal line protection shell is located outside the first signal line and fixedly connected to the first housing.

In some embodiments of the present invention, the ionization part includes: the second shell is detachably connected with the first shell; a flame generator located inside the second housing; and the support piece is used for supporting the flame generator, and a vent hole communicated with the flame generator is arranged in the support piece.

The technical scheme of the utility model prior art relatively has following technological effect:

the utility model provides an among the FID detector, because the signal line adopts the mode that encircles the collector to make it be connected with the collector electricity, its connection reliability is higher, and the setting element supports it to press on the global of collector, and stability is better, avoids when this FID detector vibrates, and the signal line breaks away from the collector and leads to contact failure, the unstable problem of signal.

Furthermore, the signal wire adopts a single-core coaxial signal wire to replace a multi-core coaxial signal wire, so that the signal wire has better strength and is not easy to break, and the stability of collecting signals by an instrument is improved.

Further, the utility model provides an among the FID detector, the collector sets up the outer edge of annular, and the constant head tank communicates to a side end face of setting element and forms the opening groove, the signal line is located during the opening inslot, the signal line with the outer peripheral face of collector and the outer equal contact of side of going up on edge of annular have further improved signal transmission's reliability.

Drawings

The objects and advantages of the present invention will be understood from the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

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

FIG. 2 is a perspective view of one embodiment of a collector in the FID detector of the present invention;

fig. 3 is a perspective view of a positioning member of the FID detector according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Fig. 1 shows a specific embodiment of an FID detector according to the present invention, which includes an ionization part 200, a polarization part 100, and an ignition part 300, which are sequentially arranged from bottom to top; after being mixed with the tail gas to be detected, the hydrogen gas and the tail gas to be detected are combusted through the ionization part 200, chemical bonds are broken when sample molecules are combusted in flame, and a certain amount of positive ions and negative ions are generated. The polarization part 100 forms an electric field, and can collect positive ions or negative ions generated after the bond of the object to be measured is broken, so as to generate a current, and the current is amplified and transmitted to an A/D converter of a recorder or a computer data acquisition system. And detection and analysis of the tail blowing to be detected are realized.

The polarization part 100 comprises a first shell 101, a collector 102 located inside the first shell 101, and the collector 102 is separated from the first shell 101 by an insulating member; the collector also comprises a first signal wire 103 used for outputting the current generated by the collector 102, and specifically, the first signal wire 103 is a single-core coaxial first signal wire 103. The first signal line 103 surrounds the collector 102 and is pressed against the circumferential surface of the collector 102 by a positioning element 104.

In the above-mentioned FID detector, since the first signal line 103 is electrically connected to the collector 102 by surrounding the collector 102, the connection reliability is high, and the positioning member 104 presses the first signal line against the periphery of the collector 102, so that the stability is good, thereby avoiding the problem that the first signal line 103 is separated from the collector 102 to cause poor contact and unstable signal when the FID detector oscillates. In addition, the first signal line 103 adopts a single-core coaxial first signal line 103 to replace a multi-core coaxial first signal line 103, so that the strength of the first signal line 103 is better and is not easy to break, and the stability of signal collection of an instrument is improved.

Specifically, in order to achieve reliable insulation of the first housing 101, the insulating member includes a first insulating member 1051 and a second insulating member 1052, and the first insulating member 1051 and the second insulating member 1052 are respectively located at two sides of the positioning member 104 and the collector 102. More specifically, the collector 102 and the first casing 101 are respectively formed into a circular sleeve structure, and the axes of the collector and the first casing coincide; the first insulating member 1051 and the second insulating member 1052 are respectively formed as cylindrical sleeve structures having circular edges, and are sleeved on the collector 102, and the outer peripheral surfaces of the circular edges are abutted against the inner peripheral surface of the first housing 101.

Specifically, the positioning element 104 is a circular ring-shaped conductive plate having an opening, the positioning element 104 is provided with a positioning slot 1041 on an inner circumferential surface thereof, and the first signal line 103 is located in the positioning slot 1041. Because the positioning member 104 is shaped like a ring, it can be sleeved on the collector 102, so that the first signal line 103 can reliably contact the whole periphery of the collector 102, and the signal transmission stability is further improved. Meanwhile, the first signal line 103 surrounds the collector 102 through a straight line segment in a circular arc shape, and the first signal line 103 is more convenient to transition through the arrangement of the notch.

In order to further increase the contact area between the first signal line 103 and the collector 102, the collector 102 is provided with an annular outer edge 1021, the positioning groove 1041 is communicated to the lower end face of the positioning member 104 to form a notch groove, and when the first signal line 103 is located in the notch groove, the first signal line 103 is in contact with both the outer peripheral surface of the collector 102 and the upper side surface of the annular outer edge 1021, so that the reliability of signal transmission is further improved.

Specifically, in order to further improve the connection stability of the first signal line 103, the polarization part 100 further includes a first signal line protection shell 106, and the first signal line protection shell 106 is located outside the first signal line 103 and is fixedly connected to the first housing 101. More specifically, the first signal line protection shell 106 is perpendicularly intersected with the axis of the first housing 101 and connected by welding, which can keep the connection part of the first signal line 103 and the collector 102 in straight line transmission, and avoid the risk of breakage caused by long-term bending of the first signal line 103.

Specifically, the ionization part 200 includes: the flame generator comprises a second shell 201, a flame generator 202 positioned in the second shell 201 and a support 203 for supporting the flame generator 202, wherein an air vent communicated with the flame generator 202 is arranged in the support 203.

Wherein the second housing 201 is detachably connected with the first housing 101; specifically, the first casing 101 is connected to the second casing 201 through a first connection portion, the first connection portion includes a first connection piece 401 and a first fastening piece 402, one end of the first connection piece 401 is clamped to the end of the first casing 101, the other end of the first connection piece 401 is inserted into the inner side of the second casing 201, and a first outer edge is arranged in the middle of the first connection piece 401; one end of the first fastening member 402 is sleeved on the first outer edge, and the other end is in threaded connection with the second housing 201.

Specifically, the ignition portion 300 includes: a third shell 301, an ignition coil 302 positioned inside the third shell 301, wherein the ignition coil 302 is connected to an ignition control circuit through a second signal wire 303.

The ignition portion 300 further includes a second signal line protection case 304, and the second signal line protection case 304 is located outside the second signal line 303 and connected to the third case 301. More specifically, the second signal line protection case 304 is disposed to intersect the axis of the third case 301 perpendicularly and is connected by welding.

Wherein the third housing 301 is detachably connected to the first housing 101; specifically, the third casing 301 is connected to the first casing 101 through a second connecting portion, the second connecting portion includes a second outer edge 3011 formed at an end of the third casing 301 and a second fastening member 501, one end of the second fastening member 501 is sleeved on the second outer edge 3011, and the other end of the second fastening member 501 is in threaded connection with the first casing 101.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An FID detector, comprising:

the ionization part and the ignition part are positioned at two ends of the polarization part; wherein the polarization part includes:

a first housing;

a collector located inside the first housing and separated from the first housing by an insulator; the first signal wire is wound on the collector and is abutted against the circumferential surface of the collector through a positioning piece.

2. The FID detector of claim 1, wherein:

the insulating part comprises a first insulating part and a second insulating part, and the first insulating part and the second insulating part are respectively located on two sides of the positioning part and the collector.

3. The FID detector of claim 2, wherein:

the positioning piece is a circular ring-shaped conductive plate with a notch, a positioning groove is formed in the inner circumferential surface of the positioning piece, and the first signal line is located in the positioning groove.

4. The FID detector of claim 3, wherein:

the collector is provided with an annular outer edge, the positioning groove is communicated to the end face of one side of the positioning piece, and the positioning piece enables the first signal line to be pressed on the surface and the outer peripheral face of the annular outer edge of the collector.

5. The FID detector of claim 1, wherein:

the first signal wire is a single-core coaxial signal wire.

6. The FID detector of claim 1, wherein:

the polarization part further comprises a first signal line protective shell, and the first signal line protective shell is located on the outer side of the first signal line and fixedly connected with the first shell.

7. The FID detector of claim 1, wherein: the ionization section includes:

the second shell is detachably connected with the first shell;

a flame generator located inside the second housing;

and the support piece is used for supporting the flame generator, and a vent hole communicated with the flame generator is arranged in the support piece.