Rapid cooling plasma beam cold cone blowing device

Abstract

The invention discloses a plasma beam cold cone purging device capable of rapidly cooling, which relates to the technical field of chemical analysis equipment for laboratories, and comprises a purging cone 1, a purging bracket 5, an outer bracket 3, an insulating sheet 4, an insulating sleeve 10 and more than one group of cooling pipes 2, the circular ring part of the right side face of the purging cone 1 is attached to the left end face of the outer support 3, the left end face of the insulating sheet 4 is attached to the right end face of the outer support 3, the left end of the insulating sleeve 10 penetrates into a center hole of the insulating sheet 4, and the end of the insulating sleeve 10 abuts against the right end face of the outer support 3; the left end face of the purging support 5 is attached to the right end face of the insulating sheet 4, and an inner step of a through hole of the purging support 5 abuts against the right end face of the insulating sleeve 10. The device has the characteristics of simple structure, low cost, convenience in maintenance, high cooling efficiency and the like, is matched with an inductively coupled plasma emission spectrometer (ICP), and is suitable for analyzing trace elements in various substances in a laboratory.

Description

Technical Field

[0001] The invention relates to the technical field of chemical analysis equipment for laboratories, in particular to a fast cooling plasma beam cold cone purge device. Background Art

[0002] In recent years, the analysis of trace elements using plasma technology has been applied in many fields. The main equipment used is the inductively coupled plasma emission spectrometer (ICP). Usually, when it is working, the ultra-high temperature plasma beam excited by the inductively coupled device needs to be cooled before entering the optical chamber. The purpose is to reduce the temperature of the plasma beam cold cone purge device to below 80°C for the operation of the spectrum experiment. At present, the cooling method for the ultra-high temperature plasma beam cold cone purge device is mostly cooling liquid.

[0003] The Chinese patent (patent application number is 201710691792.5) discloses a "plasma beam gun head suitable for processing small inner hole surfaces". The gun consists of an outer tube, an inner tube, a nozzle, a tungsten electrode, a tungsten electrode mounting tube, a water flow diversion tube, and some auxiliary support parts. Among them, the outer tube serves as the gun body, which is connected to the nozzle, the inner tube is the ion gas channel, the tungsten electrode is installed on the inner tube through the tungsten electrode mounting tube, and the water flow diversion tube constructs a cooling water channel between the inner and outer tubes. The gun head of this structure is small in size and low in height, and is suitable for processing small-diameter inner surfaces. Moreover, the water-cooling channel contacts the tungsten electrode inner tube and the nozzle at the same time, has a good cooling effect, and can operate stably at high power output for a long time.

[0004] Another Chinese patent (patent application number 201710003485.3) discloses a "plasma gas scalpel with adjustable plasma beam diameter", which includes a shell, a cathode and an ionization chamber arranged at the front end of the cathode head, an electrostatic lens-type large anode composed of an intermediate electrode and front and rear symmetrical electrodes, and the polarity and voltage difference between the intermediate electrode and the front and rear symmetrical electrodes are adjustable, inert gas and coolant flow, a handle and a cathode seat, an anode electrical connector, a plasma beam output head, and a plasma gas flow channel arranged on the ionization chamber and the electrostatic lens-type large anode and the center line of the plasma beam output head. The invention changes the polarity of the symmetrical electrodes and the intermediate electrode in the lens and the voltage difference between the symmetrical electrodes and the intermediate electrode, so as to adjust the density and intensity of the plasma and achieve different treatment purposes. Therefore, it has the comprehensive functions of not only being able to cut, ablate, coagulate, and stop bleeding of biological tissues well, or being dedicated to ablation, or being dedicated to coagulation and hemostasis, but also having the characteristics of simple structure, small size, light weight, and easy processing.

[0005] There is also a "plasma mass spectrometer" disclosed in a Chinese patent (patent application number 03805517.1), which has an ion beam extraction electrode (45) associated with a separator cone (40) to limit the pumping of gas from a region (60) just behind the injection hole (42) of the separator cone to provide a pressure (e.g. 10) downstream of the electrode (45). －3 -10 －4 Torr) have a higher pressure (e.g., 1-10 －2 Thus, a volume (60) of collision gas for attenuating polyatomic and multiply charged interfering ions is provided to the plasma (28) just prior to extraction of the ion beam (49). In one embodiment, a substance (e.g., hydrogen) may be supplied to the region (60) to assist in attenuating polyatomic and multiply charged interfering ions through reaction or collision interaction. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a cold cone purge device with simple structure, low cost, convenient maintenance and high cooling efficiency.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is to invent a rapid cooling plasma beam cold cone purging device: comprising a purging cone 1 and a purging bracket 5, and also comprising an outer bracket 3, an insulating sheet 4, an insulating sleeve 10 and one or more cooling tubes 2; the left side of the purging cone 1 is a hollow boss in the middle, and a purging hole 8 is provided in the middle of the hollow boss, and the right side thereof is annular; the outer bracket 3 is in the shape of a thickened gasket, and a non-complete closed annular groove for embedding the cooling tube 2 is provided on its right end face; the insulating sheet 4 is also in the shape of a thickened gasket; the insulating sleeve 10 is cylindrical; the purging bracket 5 is a stepped shaft with an inner step through hole;

[0008] The annular portion of the right side surface of the purge cone 1 is attached to the left end surface of the outer bracket 3, the left end surface of the insulating sheet 4 is attached to the right end surface of the outer bracket 3, the left end of the insulating sleeve 10 passes through the center hole of the insulating sheet 4, and its end portion abuts against the right end surface of the outer bracket 3; the left end surface of the purge bracket 5 is attached to the right end surface of the insulating sheet 4, and the inner step of its through hole abuts against the right end surface of the insulating sleeve 10.

[0009] The purge hole 8 is a square hole.

[0010] The hollow boss is a truncated cone, and the angle a between the cone surface and the central axis is 100-120°.

[0011] The angle a between the conical surface and the central axis is 110-115°.

[0012] The included angle a between the conical surface and the central axis is 112.6°.

[0013] The hollow boss is a curved platform formed by rotating an upwardly convex curve and having a flattened top.

[0014] The curve is a circular arc segment or a hyperbola.

[0015] The hollow boss is a curved boss formed by rotating a downward concave curve and having a flattened top.

[0016] The curve is a circular arc segment or a hyperbola.

[0017] A protruding annular mounting flange 6 is also provided in the middle of the outer cylindrical surface of the purge bracket 5 .

[0018] The insulating sheet 4 is made of PEEK polyetheretherketone material.

[0019] The insulating sleeve 10 is made of PEEK polyetheretherketone material.

[0020] The cooling tube 2 is a copper tube, and its cross section is rectangular.

[0021] The rapid cooling plasma beam cold cone purging device of the present invention adopts a boss-shaped purging cone to cooperate with an outer bracket, and a cooling pipe is nested inside the outer bracket, and the cooling pipe wall is fully in contact with the outer bracket to increase the contact area as much as possible, and the exposed cooling pipe end is connected to an external cooling water pump, so that when the ultra-high temperature plasma beam blown out from the inductive heating device passes through the purging cone, the boss surface outside the purging cone will divert most of the useless plasma beams to the outside (that is, not allowing it to enter the purging hole), and take away a large amount of heat, and the remaining useful plasma beams enter the inner hole of the outer bracket from the purging hole in the middle of the purging cone, and are quickly absorbed by the continuous cold water in the cooling pipe and taken away, so it has a simple structure and high cooling efficiency. At the same time, a square purging hole is adopted, and an insulating sheet and an insulating sleeve made of PEEK polyetheretherketone are used to form an insulated connection between the outer bracket and the purging bracket, and the optical path of the plasma beam is extended, so that the diffusion of the plasma beam can be effectively reduced, ensuring that only a very small lens is required for its subsequent collection, thereby effectively reducing the cost. In addition, all parts are standard components, making their disassembly, replacement and installation simple and convenient for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view schematic diagram of the present invention;

[0023] Figure 2 is a top view schematic diagram of the present invention;

[0024] Figure 3 It is a schematic bottom cross-sectional view along the AA axis of the present invention;

[0025] Figure 4It is a right sectional schematic diagram along the BB axis of the present invention;

[0026] Figure 5 is a front view schematic diagram of a special example 1 of the present invention;

[0027] Figure 6 is a front view schematic diagram of a special example 2 of the present invention;

[0028] Figure 7 It is a front view schematic diagram of special example 3 of the present invention.

[0029] In the figure:

[0030] 1 is the purge cone, 2 is the cooling pipe, 3 is the outer bracket, 4 is the insulating sheet, 5 is the purge bracket, 6 is the annular mounting flange, 7 is the fixing bolts of the purge cone and the outer bracket, 8 is the purge hole, 9 is the fixing bolts of the outer bracket and the purge bracket, 10 is the insulating sleeve, and a is the angle between the cone surface and the central axis. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The following description is in the form of examples, but the protection scope of the present invention should not be limited thereto.

[0032] Embodiment 1:

[0033] The rapid cooling plasma beam cold cone purging device of this embodiment is a special case in which the hollow boss is a truncated cone, and is composed of a purging cone 1, a purging bracket 5, an outer bracket 3, an insulating sheet 4, an insulating sleeve 10 and a group of cooling tubes 2 (one group is used in this example, and it can also be two or more groups, or a group of relatively wide flat tubes can also be used).

[0034] The shape of the purge cone 1 is similar to a "cymbal", and the middle of its left side protrudes into a truncated cone-shaped hollow boss (see attached Figure 5 As shown), a purge hole 8 is provided in the middle of the frustum (it can be a circular hole, a square hole, a triangular hole or other existing holes, but a square hole is preferred), and the angle a between the cone surface of the frustum and the central axis is 112.6° (the angle a ranges from 100-120°, the optimized range is 110-115°, and the optimal angle is 112.6°); the edge of the purge cone 1 is annular, and is evenly distributed with two or more (three in this example) countersunk holes for installing the purge cone and the outer bracket fixing bolts 7 made of PEEK polyetheretherketone material.

[0035] The outer bracket 3 is a thickened small hole washer (i.e., a circular washer), and its left end surface is evenly distributed with two or more (three in this example) countersunk holes for inserting the outer bracket and the purge bracket fixing bolts 9 made of PEEK polyetheretherketone material; and its right end surface is provided with an incomplete closed annular groove for embedding the cooling pipe 2 (i.e., the annular groove is similar to the letter "Ω", the two ends are not connected, but both pass through the outer cylindrical surface, as shown in the attached Figure 4 As shown in FIG. 1 , the cross section of the annular groove is rectangular, and a cooling tube 2 made of a copper tube and also having a rectangular cross section is embedded in the annular groove, and the outer wall surface of the cooling tube 2 is in close contact with the inner wall surface of the annular groove. The right side of the annular shape of the purge cone 1 is in close contact with the edge of the left side surface of the outer bracket 3, and is fixed by the purge cone and the outer bracket fixing bolts 7.

[0036] The insulating sheet 4 made of PEEK polyetheretherketone material is in the shape of a thickened gasket (ie, a circular ring-shaped gasket), and its edge is evenly distributed with through holes for passing the fixing bolts 9 of the outer bracket and the purge bracket.

[0037] The insulating sleeve 10 is a cylindrical body (ie, a round through hole is provided in the middle), and is also made of PEEK polyetheretherketone material.

[0038] The purge bracket 5 is in the shape of a stepped shaft, with an inner stepped through hole opened along the central axis, and a protruding annular mounting flange 6 (a plurality of through holes for mounting fixing bolts are evenly distributed on the edge of the annular mounting flange 6) is arranged in the middle of the outer cylindrical surface.

[0039] The right side surface (i.e., the annular part) of the purge cone 1 is attached to the left end surface of the outer bracket 3, the left end surface of the insulating sheet 4 is attached to the middle outer edge of the right end surface of the outer bracket 3, the left end of the insulating sleeve 10 passes through the central hole of the insulating sheet 4, and its end abuts against the middle of the right end surface of the outer bracket 3; the left end surface of the purge bracket 5 is attached to the right end surface of the insulating sheet 4, and the inner step of its through hole abuts against the right end surface of the insulating sleeve 10. The outer bracket and the purge bracket fixing bolt 9 connect the outer bracket 3, the insulating sheet 4 and the purge bracket 5 into one, and the purge cone and the outer bracket fixing bolt 7 connect the purge cone 1 and the outer bracket 3 into one.

[0040] Before use, the exposed end of the cooling pipe 2 is connected to the external cooling water pump, and the annular mounting flange 6 is fixed to the working position.

[0041] When in use, first turn on the cooling water pump to allow the cooling water to flow quickly through the cooling pipe 2; then, turn on the inductive coupling device (not shown in the attached figure), and then the ultra-high temperature plasma beam generated by the inductive coupling device is emitted to the purge cone 1, where most of the useless plasma beams are diverted to the outside along the cone surface on the left side of the purge cone 1 (i.e., do not enter the purge hole 8), and take away a large amount of heat; the remaining useful plasma beams enter the purge hole 8 on the outer bracket, and when passing through the middle circular hole of the outer bracket 3, they will carry the Heat is transferred (including radiation) to the inner wall of the middle circular hole of the outer bracket 3, thereby heating the outer bracket 3. At this time, since the cooling tube 2 is nested inside the outer bracket 3, and the outer wall of the cooling tube 2 is fully in contact with the inner wall of the annular groove of the outer bracket 3, the contact area is increased as much as possible. Therefore, the cold water that continuously flows through the cooling tube 2 will absorb and take away the heat through the tube wall of the cooling tube 2 and the inner wall of the annular groove of the outer bracket 3, thereby reducing the temperature of the outer bracket 3 and ensuring that the temperature of the purge bracket 5 is maintained within 80°C, which is convenient for subsequent analysis operations.

[0042] Embodiment 2:

[0043] The rapid cooling plasma beam cold cone purging device of this embodiment is a special case in which the hollow boss is a curved platform protruding upward. The difference between this embodiment and the first embodiment is that the middle of the left side of the purging cone 1 is a hollow boss protruding into a curved platform shape (see the attached Figure 6 As shown in the figure, the curved platform is formed by rotating an upwardly convex curve, and its top is flattened into a platform. The curve used can be a circular arc segment, a hyperbola or other curves.

[0044] The rest is basically the same as in Example 1 and will not be described again.

[0045] Embodiment 3:

[0046] The rapid cooling plasma beam cold cone purging device of this embodiment is a special case in which the hollow boss is a concave curved table. The difference between this embodiment and the first embodiment or the second embodiment is that the middle of the left side of the purging cone 1 is convex to form a concave curved table-shaped hollow boss (see the attached figure). Figure 7 As shown in the figure, the curved platform is formed by rotating a downward concave curve, and its top is flattened into a platform. The curve used can be a circular arc segment, a hyperbola or other curves.

[0047] The rest is basically the same as in Example 1 and will not be described again.

[0048] The fast cooling plasma beam cold cone purge device of the present invention is matched with an inductively coupled plasma emission spectrometer (ICP) and is suitable for analyzing trace elements in various substances in a laboratory.

Claims

1. A rapid cooling plasma beam cold cone purge device, comprising a purge cone (1) and a purge support (5), characterized in that: It also includes an outer bracket (3), an insulating sheet (4), an insulating sleeve (10) and one or more cooling pipes (2); the left side of the purge cone (1) is in the middle of a hollow boss, and a purge hole (8) is provided in the middle of the hollow boss, and the right side is in the shape of a circular ring; the outer bracket (3) is in the shape of a thickened gasket, and a non-complete closed annular groove for embedding the cooling pipe (2) is provided on its right end face; the insulating sheet (4) is also in the shape of a thickened gasket; the insulating sleeve (10) is in the shape of a cylinder; the purge bracket (5) is a stepped shaft with an inner step through hole; The annular portion of the right side surface of the purge cone (1) is attached to the left end surface of the outer bracket (3), the left end surface of the insulating sheet (4) is attached to the right end surface of the outer bracket (3), the left end of the insulating sleeve (10) passes through the central hole of the insulating sheet (4), and its end abuts against the right end surface of the outer bracket (3); the left end surface of the purge bracket (5) is attached to the right end surface of the insulating sheet (4), and the inner step of its through hole abuts against the right end surface of the insulating sleeve (10).

2. The rapid cooling plasma beam cold cone purging device according to claim 1, characterized in that: The purge hole (8) is a square hole.

3. The rapid cooling plasma beam cold cone purging device according to claim 1 or 2, characterized in that: The hollow boss is a truncated cone, and the angle a between the cone surface and the central axis is 100-120.

4. The rapid cooling plasma beam cold cone purging device according to claim 3, characterized in that: The included angle a between the conical surface and the central axis is 110-115°.

5. The rapid cooling plasma beam cold cone purging device according to claim 4, characterized in that: The included angle a between the conical surface and the central axis is 112.6°.

6. The rapid cooling plasma beam cold cone purging device according to claim 1 or 2, characterized in that: The hollow boss is a curved boss formed by rotating an upwardly convex curve and having a flattened top.

7. The rapid cooling plasma beam cold cone purging device according to claim 6, characterized in that: The curve is a circular arc segment or a hyperbola.

8. The rapid cooling plasma beam cold cone purging device according to claim 1 or 2, characterized in that: The hollow boss is a curved boss formed by rotating a downward concave curve and having a flattened top.

9. The rapid cooling plasma beam cold cone purging device according to claim 8, characterized in that: The curve is a circular arc segment or a hyperbola.

10. The rapid cooling plasma beam cold cone purging device according to claim 1 or 2, characterized in that: A protruding annular mounting flange (6) is also provided in the middle of the outer cylindrical surface of the purge bracket (5).

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