Plasma discharge ionization device

Abstract

The utility model provides a plasma discharge ionization device, which relates to the plasma ionization field and comprises a sample injection needle fixing piece, a sample injection needle, a tubular electrode and a fixing body, the sample injection needle penetrates into the tubular electrode, one end of the tubular electrode is connected with the sample injection needle fixing piece, the other end of the tubular electrode is connected with the fixing body, and the fixing body is connected with the sample injection needle fixing piece. And a front electrode is arranged at the front end of the fixing body. By adopting the separation type design, the sample needle end electrode can be separated from the sample needle, and the aims of quickly replacing a detection sample substance, reducing the cost, randomly adjusting the position of each component and quickly optimizing the detection sample parameter can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of plasma ionization, in particular to a plasma discharge ionization device. Background Art

[0002] Plasma discharge ionization source is a relatively efficient ionization method and is used as an ionization source in a variety of detection equipment.

[0003] However, existing ionization sources have operational difficulties in sample replacement, testing, and accessory maintenance, resulting in a large amount of time wasted during replacement and problems with assembly accuracy, ultimately leading to large errors in test results and poor repeatability.

[0004] Based on this, the present application designs an ionization device that is easy to quickly replace and detect to solve the above problems. Utility Model Content

[0005] The utility model provides a plasma discharge ionization device, which solves the technical problem of the existing ionization source having operational difficulties in sample replacement, detection and accessory maintenance.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A plasma discharge ionization device comprises an injection needle fixture, an injection needle, a tubular electrode and a fixed body. The injection needle penetrates into the tubular electrode, one end of the tubular electrode is connected to the injection needle fixture, and the other end of the tubular electrode is connected to the fixed body. A front electrode is provided at the front end of the fixed body.

[0008] Furthermore, the fixed body is a rectangular block insulator, a platform is provided at one end of the block insulator, the bottom surface of the platform is located at the center of the cross section of the block insulator, one side of the platform is parallel to the longitudinal section of the block insulator, and threaded fixing holes are provided on the left and right sides of the platform respectively.

[0009] Furthermore, a through hole is provided at the center of the block-shaped insulator, a semicircular groove coaxial with the through hole is provided in the through hole at one end of the block-shaped insulator close to the platform, and a threaded hole is provided at the other end of the block-shaped insulator.

[0010] Furthermore, a connecting hole is provided on the side wall of the fixing body, the connecting hole is communicated with the central through hole, and the connecting hole is connected to the air path connector.

[0011] Furthermore, a glass tube is provided in the semicircular groove, one end of the glass tube extends into the through hole of the fixed body, the glass tube is a hollow glass structure, the outer diameter of the glass tube is the same as the diameter of the semicircular groove, and a thin film electrode is provided on the outer wall of the glass tube, and the thin film electrode is a conductive material.

[0012] Furthermore, a fixed upper cover is provided above the platform, and a semicircular groove is provided at the bottom of the fixed upper cover, and the semicircular groove is adapted to the glass tube.

[0013] Furthermore, an opening is provided on the upper portion of the fixed upper cover, and fixing holes are respectively provided on the left and right sides of the fixed upper cover, and the fixing holes are tightly connected to the threaded fixing holes on the platform surface through screws.

[0014] Furthermore, a front electrode bracket is provided at the lower end of the fixed body, and a long through hole is provided at the center of the front electrode bracket, and the front electrode is slidably connected in the long through hole.

[0015] Furthermore, the front electrode is composed of a columnar metal at the bottom and a metal sheet with a semicircular through hole at the top, and the semicircular through hole is cocentric with the glass tube.

[0016] Furthermore, the tubular electrode is a hollow metal structure, the injection needle is a hollow glass tube, the injection needle passes through the tubular electrode, and one end of the tubular electrode passes through the threaded hole of the fixed body;

[0017] One end of the injection needle fixing piece is a columnar structure with a thread, and a small hole is provided on the end surface, and the small hole is closely matched with the outer wall of the tail end of the injection needle.

[0018] The beneficial effects of the present invention are:

[0019] The device adopts a separate design, which can separate the sample needle end electrode from the sample needle, and can achieve rapid replacement for the detection sample material, reducing costs, because the position of each component can be adjusted at will (such as the position of the front electrode and the sample needle, the position of the external electrode of the glass tube and the sample needle electrode, etc.) to quickly optimize the detection sample parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. Injection needle fixture; 2. Injection needle; 3. Tubular electrode; 4. Fixed upper cover; 5. Fixed body; 6. Thin film electrode; 7. Glass tube; 8. Pre-electrode bracket; 9. Pre-electrode; 10. Gas line connector. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] The utility model provides a technical solution: a plasma discharge ionization device, such as Figure 1 As shown, the discharge ionization device includes a sampling needle fixing part 1, a sampling needle 2, a tubular electrode 3, a glass tube 7, a thin film electrode 6, a front electrode 9, a front electrode bracket 8, a fixed upper cover 4, a fixed body 5, and a gas path connector 10.

[0028] The fixed body 5 is a rectangular block-shaped insulator with a platform at one end. The bottom of the platform is located at the center of the block's cross section, and one side of the platform is parallel to the block's longitudinal section. A threaded fixing hole is provided on the platform's surface. A through hole is located at the center of the block. A semicircular groove coaxial with the through hole is located at one end of the through hole, which is located near the platform, and a threaded hole is located at the other end. A connecting hole is provided on the sidewall of the fixed body 5, which communicates with the internal center through hole and fits tightly with the gas line connector 10.

[0029] The tubular electrode 3 is a hollow metal, and the sampling needle 2 is a hollow glass tube. The sampling needle 2 passes through the tubular electrode 3, and the tubular electrode 3 can pass through the threaded hole of the fixing member 5; one end of the sampling needle fixing member 1 is a columnar structure with a thread, and a small hole is provided on the end face, and the small hole can fit tightly with the outer wall of the tail end of the sampling needle 2.

[0030] The glass tube 7 is a hollow glass, and the outer diameter of the glass tube 7 is the same as the diameter of the semicircular groove at one end of the fixed body 5, and the glass tube 7 fits into the semicircular groove; the outer wall of the glass tube 7 is attached to the thin film electrode 6, and the thin film electrode 6 is a conductive material; the fixed upper cover 4 is a block-shaped insulator with a semicircular groove at the bottom, an opening at the top, and fixing holes on the left and right sides. The fixing holes are tightly fitted with the threaded fixing holes on the surface of the upper platform of the fixed body 5 through screws.

[0031] The front electrode holder 8 is an insulator having a long through hole from the bottom to the top, which is not limited to a rectangular shape; the front electrode 9 is a metal sheet with a cylindrical metal bottom and a semicircular through hole at the top; the metal column at the bottom end of the front electrode 9 can be placed in the long through hole of the front electrode holder 8 for sliding, and the semicircular through hole at the top end of the front electrode 9 is concentric with the glass tube 7.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plasma discharge ionization device, characterized in that: The invention comprises an injection needle fixing part (1), an injection needle (2), a tubular electrode (3) and a fixing body (5); the injection needle (2) penetrates into the tubular electrode (3); one end of the tubular electrode (3) is connected to the injection needle fixing part (1); the other end of the tubular electrode (3) is connected to the fixing body (5); and a front electrode (9) is provided at the front end of the fixing body (5).

2. The plasma discharge ionization device according to claim 1, characterized in that: The fixed body (5) is a rectangular block insulator, one end of which is provided with a platform, the bottom surface of which is located at the center of the cross section of the block insulator, one side of which is parallel to the longitudinal section of the block insulator, and the left and right sides of which are provided with threaded fixing holes.

3. The plasma discharge ionization device according to claim 2, characterized in that: A through hole is provided at the center of the block-shaped insulator, a semicircular groove coaxial with the through hole is provided in the through hole near one end of the block-shaped insulator on the platform, and a threaded hole is provided at the other end of the block-shaped insulator.

4. The plasma discharge ionization device according to claim 1, characterized in that: The side wall of the fixed body (5) is provided with a connecting hole, the connecting hole is communicated with the central through hole, and the connecting hole is connected to the gas path connector (10).

5. The plasma discharge ionization device according to claim 3, characterized in that: A glass tube (7) is provided in the semicircular groove, one end of the glass tube (7) extends into the through hole of the fixed body (5), the glass tube (7) is a hollow glass structure, the outer diameter of the glass tube (7) is the same as the diameter of the semicircular groove, and a thin film electrode (6) is provided on the outer wall of the glass tube (7), and the thin film electrode (6) is a conductive material.

6. The plasma discharge ionization device according to claim 2, characterized in that: A fixed upper cover (4) is provided above the platform, and a semicircular groove is provided at the bottom of the fixed upper cover (4), and the semicircular groove is adapted to fit the glass tube (7).

7. The plasma discharge ionization device according to claim 6, characterized in that: An opening is provided on the upper portion of the fixed upper cover (4), and fixing holes are respectively provided on the left and right sides of the fixed upper cover (4), and the fixing holes are tightly connected to the threaded fixing holes on the platform surface by screws.

8. The plasma discharge ionization device according to claim 1, characterized in that: A front electrode bracket (8) is provided at the lower end of the fixed body (5), and a long through hole is provided at the center of the front electrode bracket (8), and a front electrode (9) is slidably connected in the long through hole.

9. The plasma discharge ionization device according to claim 8, characterized in that: The front electrode (9) is composed of a columnar metal at the bottom and a metal sheet with a semicircular through hole at the top, wherein the semicircular through hole is cocentric with the glass tube (7).

10. The plasma discharge ionization device according to claim 1, characterized in that: The tubular electrode (3) is a hollow metal structure, the injection needle (2) is a hollow glass tube (7), the injection needle (2) passes through the tubular electrode (3), and one end of the tubular electrode (3) passes through the threaded hole of the fixed body (5); One end of the injection needle fixing part (1) is a columnar structure with a thread, and a small hole is provided on the end surface, and the small hole is tightly matched with the outer wall of the tail end of the injection needle (2).

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