CN202818751U - Plasma torch with a plurality of inlets for guiding cooling air - Google Patents
Plasma torch with a plurality of inlets for guiding cooling air Download PDFInfo
- Publication number
- CN202818751U CN202818751U CN 201220320313 CN201220320313U CN202818751U CN 202818751 U CN202818751 U CN 202818751U CN 201220320313 CN201220320313 CN 201220320313 CN 201220320313 U CN201220320313 U CN 201220320313U CN 202818751 U CN202818751 U CN 202818751U
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- China
- Prior art keywords
- plasma torch
- outer tube
- glass outer
- plasma
- refrigerating gas
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Abstract
The utility model relates to a plasma torch with a plurality of inlets for guiding cooling air. The plasma torch includes a glass inner pipe comprising an outlet where plasmas are formed; a glass outer pipe including at least three inlets for receiving the cooling air and distributing the cooling air between the glass outer pipe and the glass inner pipe; and a cartridge casing comprising an air receiving inlet which is in a fluid communication with the glass outer pipe. The radial offset between any two of the at least three inlets is less than 180 degrees.
Description
Technical field
The application relates to plasma torch (plasma torch).
Background technology
Plasma torch for generation of and transmit plasma, use for the multiple application in the analytical chemistry.For example, inductively coupled plasma (ICP) is generally used in such application.
Cartridge type (cartridge-type) plasma torch is convenient to that plasma source is connected to the dependence plasma and is carried out chemico-analytic instrument.The cartridge type plasma torch carries out when being configured in being arranged on the spray gun loader from being dynamically connected.By contrast, the plasma torch of some type need to carry out independent pipe and connect, and produces plasma to be used for spray gun.
Some part of cartridge type plasma torch comprises glass material.When producing plasma ball in spray gun, the extreme heat that is produced by spray gun can adversely affect silica glass component, causes the early failure of plasma torch.
Therefore, need to overcome at least the plasma torch of the shortcoming of above-mentioned known plasma torch.
The utility model content
In representative embodiment, a kind of plasma torch comprises: glass inner tube, and it comprises entrance, forms plasma in the porch; The glass outer tube, it comprises at least three entrances, these entrances are used for receiving refrigerating gas and refrigerating gas being distributed between glass outer tube and the glass inner tube; Cylinder shell, it comprises that gas receives entrance, the glass outer tube receives entrance with gas and fluidly is communicated with.Between any two in these at least three entrances at radial deflection less than 180 °.
Description of drawings
When reading accompanying drawing, can understand best the utility model from following detailed description.Feature does not need to draw in proportion.In feasible situation, identical Reference numeral represents identical feature.
Fig. 1 is the perspective view according to the cartridge type plasma torch of representative embodiment.
Fig. 2 is the sectional view of the plasma torch shown in Figure 1 obtained along line 2-2.
Fig. 3 is the simplification sectional view according to the plasma torch that air-flow is shown of representative embodiment.
Fig. 4 is the vertical view according to the plasma torch that comprises three entrances of representative embodiment.
Embodiment
In following detailed description, in order describing but not limited, to illustrate detail is carried out disclosed representative embodiment, to provide thorough understanding of the present utility model.Can omit the description to known devices, material and manufacture method, to avoid making the description indigestibility to exemplary embodiment.However, can use such device, materials and methods in those of ordinary skills' ken according to representative embodiment.
Some term that it should be understood that in this article definition is just in order to describe specific embodiment, rather than will be limited.The term of definition is that the term of this definition is understood in the utility model technical field and the technology of acceptance and replenishing of Scientific Meaning usually.
As used in the specification and in the claims, word " ", " described " and " being somebody's turn to do " not only comprise the odd number denotion but also comprise the plural number denotion, unless context has clear in addition.Therefore, for example, " device " comprises a device and a plurality of device.
As used in the specification and in the claims, word " substantially " or " basically " mean allowing within boundary or the degree except their common implications.
As used in the specification and in the claims, word " approximately " means allowing within boundary or the quantity except its common implication to those skilled in the art.
Fig. 1 is the perspective view according to the plasma torch 100 of representative embodiment.Plasma torch 100 comprises first end 101 and the second end 102, and first end 101 is provided for being injected into the entrance (Fig. 1 is not shown) of the suction sample in the plasma, and the second end 102 is provided for forming the outlet of the gas of plasma.Near the plasma that forms the second end 102 can be to use known devices (not shown), method and the formed inductively coupled plasma of material (ICP) or microwave plasma (MP).
Glass outer tube 103 is arranged to around glass inner tube 104, and wherein glass outer tube 103 and glass inner tube 104 have the common axis 105 of the geometric center of passing them jointly.Cylinder shell 106 comprises some part of plasma torch 100.Cylinder shell 106 is configured to be connected to the analytical equipment (not shown).Following more comprehensively description, cylinder shell 106 comprises that the first entrance 107, the first entrances 107 are used for providing refrigerating gas between glass inner tube 104 and glass outer tube 103.Refrigerating gas provides protective barrier between glass outer tube 103 and plasma.The second entrance 108 allows gas to enter plasma.In representative embodiment, refrigerating gas comprises nitrogen, although can consider to be suitable for providing other gases of protective barrier between glass outer tube 103 and plasma.
Glass inner tube 104 and glass outer tube 103 can be a kind of in a lot of glass materials, for example silica glass material or other ceramic materials that is fit to.Cylinder shell 106 is usually by the known polymer material manufacturing that is suitable for using in the cartridge type plasma torch.
Fig. 2 is the sectional view of the plasma torch shown in Figure 1 100 obtained along line 2-2.As mentioned above, glass outer tube 103 is arranged to center on one heart glass inner tube 104, and glass inner tube 104 and glass outer tube 103 have the common axis of symmetry 201 of passing their geometric centers separately.Followingly describe more comprehensively, the first entrance 107 provides refrigerating gas to plenum chamber 202, plenum chamber 202 equably with distribution of gas to a plurality of entrances (not shown among Fig. 2).A plurality of entrances promote that more uniform refrigerating gas distributes between glass inner tube 104 and the glass inner tube 103.Refrigerating gas distributes and reduces by the heat that produces at the formed plasma (not shown) in the second end 102 places of plasma torch 100 uniformly, this final basic prevention the useful life that forms " hot-zone " and increase plasma torch 100 around glass outer tube 103.Use at least three entrances to be used between glass inner tube 104 and glass outer tube 103, providing refrigerating gas, to be particularly useful for assembly (for example, glass inner tube 104 and glass outer tube 103), and final useful life that prolongs plasma torch 100 of guaranteeing that more uniform refrigerating gas distributes, prevents forming " hot-zone ", prevents from damaging plasma torch 100.
Be in operation, the gas that is used to form plasma flows into from the second entrance 108, and the suction sample enters at first end 101 places of plasma torch 100 and discharges at the second end 102 places.Exemplary, plasma is by method known to persons of ordinary skill in the art and the formed ICP of material or MP.
Fig. 3 is the simplification sectional view according to the plasma torch that air-flow is shown 300 of representative embodiment.A lot of details and plasma torch 300 in conjunction with the described plasma torch 100 of the embodiment of Fig. 1 and 2 are common, will not repeat.
Plasma torch 300 comprises cylinder shell 301, and cylinder shell 301 has the first opening 302 and the second opening 303.The first opening 302 is from the gas of gas source (not shown) reception for generation of plasma.The second opening 303 receives refrigerating gases 304, and what refrigerating gas 304 was exemplary is nitrogen.Plasma torch comprises glass outer tube 305 and glass inner tube 306.Plenum space 307 is formed between glass outer tube 305 and the cylinder shell 301.Glass outer tube 305 comprises a plurality of entrances 308, and entrance 308 travels through the flow path that then plenum space 307 leaves via gap 312 for refrigerating gas 304 provides from the second opening 303, and gap 312 is as the outlet of refrigerating gas.
Outlet 310 places in glass inner tube 306 form plasma 309.Form plasma 309 by known method by the gas that the first opening 302 places at plasma torch 300 receive.That as mentioned above, plasma 309 is exemplary is ICP or MP.Plasma 309 is easy to expand, and can produce and unacceptably heat glass inner tube 306 and glass outer tube 305.The heat that is produced by plasma 309 can damage the integrality of plasma torch 300 and cause plasma torch 300 lost efficacy or reduce plasma torch 300 useful life or above-mentioned both.The layout of a plurality of entrances 308 is used for providing refrigerating gas 304 from plenum space 307.Refrigerating gas 304 flows and leaves via gap 312 around the axis of symmetry 311 through a plurality of entrances 308 and ring-type continuously, causes heat in the inside of glass inner tube 306 and glass outer tube 305 and periphery dissipates.
In representative embodiment, at least three entrances 308 are set in glass outer tube 305.Exemplarily, center on the circumference of glass outer tube 305 with the basic angle intervals inlet porting 308 that equates.Thus, if utilize three entrances 308, then around the circumference of the glass outer tube 305 angle intervals inlet porting 308 with 120 °.Similarly, if utilize four entrances 308, then with 90 ° angle intervals inlet porting 308.Although usually by testing to determine the physical constraints to the quantity of entrance 308, the utility model can consider to use 3,4,5,6,7,8,9 or 10 or more entrance 308.In addition, between any two in these at least three entrances at radial deflection less than 180 °.
By contrast, only use one or two entrance 308 to be not enough to cause that refrigerating gas 304 is from the plenum space 307 suitable heats that distribute effectively to dissipate and to be produced by plasma 309.
What should emphasize is that the circumference that centers on glass outer tube 305 only is exemplary with the basic angle intervals inlet porting 308 that equates, can with unequal angle intervals three or more entrances 308 be set around the circumference of glass outer tube 305.
Fig. 4 is the vertical view according to the plasma torch that air-flow is shown 400 of representative embodiment.Be common in conjunction with the described plasma torch 100 of the embodiment shown in Fig. 1-3,300 a lot of details and plasma torch 400, will do not repeat.Plasma torch 400 comprises cylinder shell 401, around glass inner tube 403 glass outer tube 402 is set with one heart.Plenum space 404 is arranged between cylinder shell 401 and the glass outer tube 402.The first entrance 405, the second entrance 406 and the 3rd entrance 407 are arranged in the glass outer tube 402, and are communicated with cooling gas inlet 408 fluids in being arranged on cylinder shell 401.
In the embodiment shown in fig. 4, plasma torch 400 comprises three (3) the individual entrances that arrange with 120 ° equal angles interval around the circumference of glass outer tube 402.As mentioned above, need minimum three entrances provide refrigerating gas from plenum space 404 along annular gap 412 the heat of abundant distribution effectively to dissipate and to be produced by plasma 409, plasma 409 forms in the exit of glass inner tube 403.As above further described, can consider in glass outer tube 402 more than three entrances to be used for that refrigerating gas is transported to annular gap 412.In addition, it only is exemplary separating first, second, and third (or more) entrance 405,406 and 407 around the circumference of glass outer tube 402 with the phase parfocal, can with unequal angle intervals first, second, and third (or more) entrance 405,406 and 407 be set around the circumference of glass outer tube 402.
Be in operation, provide refrigerating gas 410 from cooling gas inlet 408, refrigerating gas 410 is from advancing as the space 411 of the annular that centers on cylinder shell 401.Refrigerating gas 410 passes space 411 and then flows through in first, second, and third entrance 405,406 and 407 each through plenum spaces 404.Flow out from annular gap 412 from first, second, and third entrance 405,406 and 407 refrigerating gas 410, and the heat that dissipates and produced by plasma 409.Use three or more entrances (for example, first, second, and third entrance 405,406 and 407) to promote from the better distribution of the refrigerating gas 410 of annular gap 412 outflows, and significantly improve the heat radiation from plasma 409.Since improve refrigerating gas 410 distribution, and improve thus distribution from the heat of plasma 409, so improve and make the not infringement of the heat of subject plasma 409 of glass outer tube 402 and glass inner tube 403, cause the inefficacy that reduces plasma torch 400 and the useful life that prolongs plasma torch.
Consider disclosure text, what it should be noted that is, can be in meeting variation structure of the present utility model, realize various plasma torch and using method thereof with change component and changing method.In addition, the various assemblies that comprise, structure and parameter only are used for explanation and give an example, and do not have any limited significance.Consider disclosure text, those skilled in the art can carry out the utility model and determine themselves application and realize that these use needed assembly, material, construction and device in the scope of claims.
Claims (9)
1. plasma torch is characterized in that comprising:
Glass inner tube, described glass inner tube comprises plasma in its exit;
The glass outer tube, it comprises at least three entrances, these entrances are used for receiving refrigerating gas and described refrigerating gas being distributed between described glass outer tube and the described glass inner tube; With
Cylinder shell, it comprises that gas receives entrance, described glass outer tube fluidly is communicated with described gas reception entrance, wherein, between any two in described at least three entrances at radial deflection less than 180 °.
2. plasma torch according to claim 1, wherein, described glass outer tube is arranged to one heart around described glass inner tube.
3. plasma torch according to claim 2, wherein, described cylinder shell is arranged to one heart around described glass outer tube.
4. plasma torch according to claim 1, wherein, described glass inner tube and described glass outer tube comprise silica glass material separately.
5. plasma torch according to claim 1 wherein, is that the circumference that centers on described glass outer tube arranges with the basic interval that equates for the described entrance that receives described refrigerating gas.
6. plasma torch according to claim 1 wherein, is to arrange around the interval of described glass outer tube with 120 ° for the described entrance that receives described refrigerating gas.
7. plasma torch according to claim 1, wherein, described refrigerating gas distributes substantially equably around described glass inner tube.
8. plasma torch according to claim 1, wherein, described refrigerating gas flows along the plenum space between described cylinder shell and the described glass outer tube.
9. a cartridge type spare is characterized in that comprising plasma torch claimed in claim 1.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161562939P | 2011-11-22 | 2011-11-22 | |
| US61/562,939 | 2011-11-22 | ||
| US201261623680P | 2012-04-13 | 2012-04-13 | |
| US61/623,680 | 2012-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818751U true CN202818751U (en) | 2013-03-20 |
Family
ID=47877548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320313 Expired - Lifetime CN202818751U (en) | 2011-11-22 | 2012-06-29 | Plasma torch with a plurality of inlets for guiding cooling air |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202818751U (en) |
| AU (1) | AU2012216396A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549820A (en) * | 2014-12-26 | 2015-04-29 | 西安交通大学 | Block-prevention micro-spray gun system of quartz-metal composite structure |
-
2012
- 2012-06-29 CN CN 201220320313 patent/CN202818751U/en not_active Expired - Lifetime
- 2012-08-23 AU AU2012216396A patent/AU2012216396A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549820A (en) * | 2014-12-26 | 2015-04-29 | 西安交通大学 | Block-prevention micro-spray gun system of quartz-metal composite structure |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2012216396A1 (en) | 2013-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |
|
| CX01 | Expiry of patent term |