Rapid cooling plasma beam cold cone blowing device

Abstract

The utility model 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 support 5, an outer support 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 utility model relates to the chemical analysis equipment technical field of laboratory, especially a kind of plasma beam cold cone purging device of rapid cooling. BACKGROUND

[0002] In recent years, the analysis of trace elements using plasma technology has been applied in many fields. The main equipment used is inductively coupled plasma atomic emission spectrometer (ICP). Under normal circumstances, the super-high temperature plasma beam generated by the inductively coupled device needs to be cooled before entering the light chamber. The purpose is to reduce the temperature of the plasma beam cold cone purging device to below 80℃, so as to perform the operation of spectral experiment. At present, the cooling of the super-high temperature plasma beam cold cone purging device is mostly achieved by using cooling liquid.

[0003] A "plasma beam gun head suitable for small inner hole surface machining" disclosed in a Chinese patent (patent application number 201710691792.5) is composed of an outer tube, an inner tube, a nozzle, a tungsten electrode, a tungsten electrode mounting tube, a water flow distribution pipe, and some auxiliary supporting parts. The outer tube serves as the body of the gun and is connected to the nozzle. The inner tube is an ion gas channel. The tungsten electrode is mounted on the inner tube through the tungsten electrode mounting tube. The water flow distribution pipe forms a cooling water channel between the inner and outer tubes. The gun head of this structure has a small size and low height, and is suitable for machining the inner surface of small diameter holes. Moreover, the water cooling channel simultaneously contacts the tungsten electrode inner tube and the nozzle, has good cooling effect, and can operate stably for a long time under high power output.

[0004] Another Chinese patent (patent application number 201710003485.3) discloses a "plasma gas scalpel with adjustable plasma beam diameter". It includes a shell, a cathode, an ionization cavity provided at the front end of the cathode head, an electrostatic lens type large anode composed of a middle electrode and front and rear symmetric electrodes, and the polarity and voltage difference between the middle electrode and the front and rear symmetric electrodes are adjustable, inert gas and cooling liquid flow, handle and cathode seat, anode electrical connector, plasma beam output head, and plasma gas flow channel provided on the center line of the ionization cavity, electrostatic lens type large anode, and plasma beam output head. This invention changes the polarity of the symmetric electrodes and the middle electrode in the lens and the voltage difference between the symmetric electrodes and the middle electrode, which adjusts the density and intensity of the plasma, and achieves different treatment purposes. Therefore, it has the functions of cutting, ablation, coagulation, hemostasis, ablation, coagulation and hemostasis, etc., and has the characteristics of simple structure, small size, light weight, easy processing, etc.

[0005] There is also a Chinese patent (patent application number 03805517.1) disclosed in the "Plasma Mass Spectrometer", which has an ion beam extraction electrode (45) associated with a separator cone (40) to limit the pumping of gas from the area (60) just behind the separator cone injection hole (42) to provide a pressure (e.g. 10 －3 -10 －4 Torr) have higher pressures (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 interactions. Summary of the Invention

[0006] The technical problem to be solved by the utility model 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 design a rapid cooling plasma beam cold cone purge device: comprising a purge cone 1 and a purge bracket 5, further comprising an outer bracket 3, an insulating sheet 4, an insulating sleeve 10 and one or more cooling tubes 2; the purge cone 1 is shaped like a "cymbal", with a hollow boss in the middle of its left side, and a purge hole 8 is opened in the middle of the hollow boss, and its right side is annular; the outer bracket 3 is in the shape of a thickened small hole washer, and a non-complete closed annular groove for embedding the cooling tube 2 is opened on its right end face; the insulating sheet 4 is also in the shape of a thickened washer; the insulating sleeve 10 is cylindrical; the purge bracket 5 is a stepped shaft with an inner step through hole;

[0008] The circular part 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 rests 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 rests 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 its cone surface and the central axis is 100-120 ° .

[0011] The angle a between the cone 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 surface platform which is curved upward and whose top is flattened.

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

[0015] The hollow boss is a curved surface platform which is curved downward and whose top is flattened.

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

[0017] A protruding annular mounting flange 6 is arranged in the middle of the outer cylindrical surface of the blowing support 5.

[0018] The insulating sheet 4 is made of PEEK polyether ether ketone material.

[0019] The insulating sleeve 10 is made of PEEK polyether ether ketone material.

[0020] The cooling pipe 2 is a red copper pipe with a rectangular cross section.

[0021] The quick-cooling plasma beam cold cone blowing device adopts a boss-shaped blowing cone cooperating with an outer support, and a cooling pipe is nested in the inner part of the outer support, and the cooling pipe wall is in full contact with the outer support, so that the contact area is increased as much as possible, and the exposed cooling pipe end is connected with an external cooling water pump, so that when the ultra-high temperature plasma beam blown out from the inductive heating device passes through the blowing cone, the boss surface outside the blowing cone will divert most of the useless plasma beam to the outside (i.e. not allowing it to enter the blowing hole), and carry away a large amount of heat, and the remaining useful plasma beam enters the inner hole of the outer support through the blowing hole in the middle of the blowing cone, and is rapidly absorbed and carried away by the continuous cold water in the cooling pipe, so that the structure is simple and the cooling efficiency is high. At the same time, the square blowing hole is adopted, and the insulating sheet and the insulating sleeve made of PEEK polyether ether ketone material are used to insulate the connection between the outer support and the blowing support, and to prolong the optical path of the plasma beam, so that the diffusion of the plasma beam can be effectively reduced, and the subsequent collection only needs a small lens, thereby effectively reducing the cost. In addition, all parts are standard components, so that the disassembly, replacement and installation are simple and convenient for subsequent maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the front view of the utility model;

[0023] Figure 2 is the top view of the utility model;

[0024] Figure 3is the elevation view along the A-A axis of the utility model;

[0025] Figure 4 is the right section view along the B-B axis of the utility model;

[0026] Figure 5 is the front view of the special case 1 of the utility model;

[0027] Figure 6 is the front view of the special case 2 of the utility model;

[0028] Figure 7 is the front view of the special case 3 of the utility model.

[0029] In the drawing,

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

[0031] The utility model is further explained below in combination with the drawings and examples. The following explanation is in the form of example, but the protection scope of the utility model should not be limited to this.

[0032] Example 1:

[0033] The rapid cooling plasma beam cold cone blowing device of the example is a special case of the hollow boss being a conical table, which is composed of a blowing cone 1, a blowing support 5, an outer support 3, an insulating sheet 4, an insulating sleeve 10 and a group (one group is adopted in this example, and two or more groups can also be adopted, and a relatively wide flat pipe can also be adopted) of cooling pipes 2.

[0034] The shape of the blowing cone 1 is similar to "cymbals", and the middle of the left side is raised as a conical table-shaped hollow boss (see the attached Figure 5 drawing), and a blowing hole 8 (which can be a round hole or a square hole or a triangular hole or other existing holes, but a square hole is preferred) is arranged in the middle of the conical table, and the included angle a of the conical surface of the conical table and the central axis is 112.6 ° (the range of the included angle a is 100-120 ° , the optimized range is 110-115 ° , and the best included angle is 112.6 ° ); the edge of the blowing cone 1 is circular, and two or more (three are adopted in this example) sunken head holes for passing through the blowing cone and the outer support fixing bolt 7 made of PEEK polyether ether ketone material are uniformly arranged on the edge.

[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; its right end surface is provided with a non-complete closed annular groove for embedding the cooling pipe 2 (i.e., the annular groove is similar to the letter "Ω", with both ends not connected, but both protrude to the outer cylindrical surface, as shown in the attached figure). Figure 4 (As shown), the annular groove has a rectangular cross-section. A cooling pipe 2, also rectangular in cross-section and made of copper, is embedded within the groove, with the outer wall of the cooling pipe 2 closely contacting the inner wall of the groove. The right side of the annular purge cone 1 abuts against the left edge of the outer bracket 3, and the purge cone and outer bracket are secured by bolts 7.

[0036] The insulating sheet 4 made of PEEK polyetheretherketone material is in the shape of a thickened washer (ie, a circular washer), 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 opened 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 step through hole opened along the central axis, and a protruding annular mounting flange 6 provided in the middle of its outer cylindrical surface (a plurality of through holes for installing fixing bolts are evenly distributed on the edge of the annular mounting flange 6).

[0039] The right side (i.e., the annular portion) of the purge cone 1 is attached to the left end face of the outer bracket 3. The left end face of the insulating sheet 4 is attached to the middle outer edge of the right end face 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 abuts the middle portion of the right end face of the outer bracket 3. The left end face of the purge bracket 5 is attached to the right end face of the insulating sheet 4, and the inner step of its through hole abuts the right end face of the insulating sleeve 10. The outer bracket and purge bracket fixing bolts 9 connect the outer bracket 3, insulating sheet 4, and purge bracket 5 into one. The purge cone and outer bracket fixing bolts 7 connect the purge cone 1 and 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] In use, first, the cooling water pump is started to make the cooling water flow through the cooling pipe 2 at all times; then, the inductive coupling device (not shown in the drawing) is started, and the inductive coupling device generates an ultra-high temperature plasma beam which is directed to the purge cone 1, at which most of the useless plasma beam is shunted to the outside of the room along the left side surface of the conical platform of the purge cone 1 (i.e. does not enter the purge hole 8) and carries away a large amount of heat; the remaining useful plasma beam enters the purge hole 8 on the outer support and, when passing through the middle circular hole of the outer support 3, will transfer (also including radiation) the heat carried by the plasma beam to the inner wall of the middle circular hole of the outer support 3, thereby heating the outer support 3; at this time, since the cooling pipe 2 is nested in the inner part of the outer support 3 and the outer wall of the cooling pipe 2 is in full contact with the inner wall of the annular groove of the outer support 3, the contact area is increased as much as possible, so that the cooling water flowing through the cooling pipe 2 at all times will absorb and carry away the heat through the pipe wall of the cooling pipe 2 and the inner wall of the annular groove of the outer support 3, thereby reducing the temperature of the outer support 3 and ensuring that the temperature of the purge support 5 is kept below 80 DEG C, facilitating subsequent analysis operations.

[0042] Embodiment 2

[0043] The rapid cooling plasma beam cold cone purging device of the embodiment is a special case in which the hollow boss is an upwardly convex curved platform, which is different from the embodiment 1 in that the left side surface of the purge cone 1 is convex in the middle to form a hollow boss in the shape of a curved platform (see the drawing), the curved platform is formed by rotating an upwardly convex curve, and the top of the curved platform is cut into a platform, and the curve used can be an arc segment or a hyperbolic curve or other curves. Figure 6

[0044] Other aspects are basically the same as those of the embodiment 1, which will not be described here.

[0045] Embodiment 3

[0046] The rapid cooling plasma beam cold cone purging device of the embodiment is a special case in which the hollow boss is a downwardly concave curved platform, which is different from the embodiment 1 or the embodiment 2 in that the left side surface of the purge cone 1 is convex in the middle to form a hollow boss in the shape of a downwardly concave curved platform (see the drawing), the curved platform is formed by rotating a downwardly concave curve, and the top of the curved platform is cut into a platform, and the curve used can be an arc segment or a hyperbolic curve or other curves. Figure 7

[0047] Other aspects are basically the same as those of the embodiment 1, which will not be described here.

[0048] The rapid cooling plasma beam cold cone purging device of the embodiment, matched with an inductive coupling plasma emission spectrometer (ICP), is suitable for analyzing trace elements in various substances in a laboratory.​​

Claims

1. A fast-cooling plasma beam cold cone purging device comprising a purging cone (1) and a purging holder (5), characterized in that: Also included are an outer support (3), an insulating sheet (4), an insulating sleeve (10), and a set of more than one cooling pipe (2); the purge cone (1) is shaped like a "cymbal", with a hollow boss in the middle of its left side, and a purge hole (8) in the middle of the hollow boss, and its right side is circular; the outer support (3) is shaped like a thickened small-hole washer, with a non-intact closed ring groove in its right end surface for embedding the cooling pipe (2); the insulating sheet (4) is also shaped like a thickened washer; the insulating sleeve (10) is cylindrical; and the purge support (5) is a stepped shaft with an inner stepped through hole; The circular part of the right side of the purge cone (1) is attached to the left end surface of the outer support (3), the left end surface of the insulating sheet (4) is attached to the right end surface of the outer support (3), the left end of the insulating sleeve (10) is inserted into the center hole of the insulating sheet (4), and its end is against the right end surface of the outer support (3); the left end surface of the purge support (5) is attached to the right end surface of the insulating sheet (4), and the inner step of its through hole is against the right end surface of the insulating sleeve (10).

2. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 1, wherein: The purge hole (8) is a square hole.

3. The rapid-cooled, plasma-beam cold- cone purging apparatus of claim 1 or 2, wherein: The hollow boss is a conical boss, with an included angle a between the conical surface and the central axis of 100-120°.

4. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 3, wherein: The included angle a between the conical surface and the central axis is 110-115°.

5. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 4, wherein: The included angle a between the conical surface and the central axis is 112.6°.

6. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 1 or 2, wherein: The hollow boss is a curved surface boss that is curved upward and rotated, with its top being flattened.

7. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 6, wherein: The curve is a circular arc segment or a hyperbolic curve.

8. The rapid-cooled, plasma-beam cold- cone purging apparatus of claim 1 or 2, wherein: The hollow boss is a curved surface boss that is curved downward and rotated, with its top being flattened.

9. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 8, wherein: The curve is a circular arc segment or a hyperbolic curve.

10. The rapid-cooling, plasma-beam cold- cone purging apparatus of claim 1 or 2, wherein: A protruding ring-shaped mounting flange (6) is also provided in the middle of the outer cylindrical surface of the purge support (5).

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