CN2517500Y

CN2517500Y - Thermotube nozzle

Info

Publication number: CN2517500Y
Application number: CN 01266723
Authority: CN
Inventors: 朱丹平
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-10-30
Filing date: 2001-10-30
Publication date: 2002-10-23
Anticipated expiration: 2011-10-30

Abstract

The utility model relates to a heat pipe type nozzle, which can transfer heat at both axial and radial directions, comprising an outer tube case, an inner tube case, an upper gland and a lower gland, which are connected with each other through nondetachable manners, such as welding, to form a sleeve provided with a hollow cavity, which is airtight for vacuum production; heat pipe medium and an imbibition core are arranged inside of the cavity, so the nozzle assembly turns to be the integrated heat pipe provided with the typical heat transfer performances at both axial and radial directions. When heat fluid flows through an internal hole of the nozzle, based on the working principle, the heat pipe can rapidly transfer the heat at local heating surface to the other heat elimination surfaces to achieve the purpose of cooling the nozzle.

Description

Heat pipe nozzle

Affiliated technical field

The present invention relates to a kind of mechanical organ or part, specifically is a kind of heat pipe nozzle of the cooling of axially and radially can conducting heat.

Background technology

The nozzle that sprays hot fluid is widely used in engineering, particularly: the nozzle of the nozzle of plasma welding cutting torch, plasma spraying, the nozzle of electron beam gun, large power, electrically arc welding torch etc.Since they when work under the effect of electric field that high voltage or high electric current produced, the high-temperature hot fluid nozzle of flowing through for a long time, make it easy deformation, the lost of life even damage under heat effect, the bottom of nozzle particularly, instant heating fluid issuing position is so need be provided with resistant to elevated temperatures parts in many cases at this position or adopt the circulating water cooling.Even like this, its life-span is often not long yet, adopts the circulating water cooling can make then that its optional equipment increases, structure complicated, the more important thing is, because the seepage of cooling water will be destroyed its inner electric insulation, and reduced the reliability of equipment continuous operation greatly.

Summary of the invention

The present invention's purpose just is to overcome the deficiency of above technology, and provide that a kind of heat transfer rate is fast, the heat transfer direction is many, structure is light and handy, easy to install axially and the heat pipe nozzle that radially can conduct heat.

The object of the present invention is achieved like this: a kind of heat pipe nozzle, comprise outer pipe shell (1), interior shell (2), upper cover (3), low head (4), heat-pipe working medium (5), imbibition core (6), it is characterized in that: adopt non-dismountable ways of connecting to form a sleeve pipe that has sandwich cavity K by these four parts of outer pipe shell (1), interior shell (2), upper cover (3) and low head (4), and this cavity K is airtight, as to be in a vacuum state space, and heat-pipe working medium (5) and imbibition core (6) are housed in the cavity K.Imbibition core (6) can be arranged on the whole inwalls of cavity K, also can be arranged on the part inwall of cavity K, but should be provided with on the lower inner wall of cavity K at least.Like this, outer pipe shell (1), interior shell (2), upper cover (3), low head (4), heat-pipe working medium (5) and imbibition core (6) have just been formed a complete heat pipe, this heat pipe had both had the feature of plain shaft to heat transfer heat pipe, had the extraordinary radially feature of heat transfer heat pipe again.Promptly when hot fluid flows in the inner orifice of interior shell (2), heat can be delivered to rapidly from the outer wall of interior shell (2) on the outer wall of outer pipe shell (1)-and at this moment, this heat pipe just becomes a kind of " the radially heat pipe of Chuan Reing "; When fluid only is when just becoming hot fluid when flowing out in the hole of the inner orifice exit of interior shell (2) and low head (4), then the heat at the aperture of this exit and low head (4) place just can be delivered to this all tube walls of heat pipe package top-at this moment rapidly, this heat pipe is exactly a kind of " heat pipe of axial heat conduction ", certainly in this case, the sub-fraction heat also is swiftly delivered to the outer pipe wall of heat pipe package bottom-promptly have the simultaneously performance of " the radially heat pipe of Chuan Reing ".Thereby realize the present invention's purpose.

Adopt the present invention will obtain following effect:

1, owing to adopted the principle and the structure of heat pipe, so heat transfer rate is exceedingly fast, this just means, the suffered localized heat of nozzle can promptly be transmitted, diffusion, and transmit and the process of diffusion in voluntarily cooling or in other places of distance focus by other cold media coolings.

2, because the heat pipe here has the property of radial and axial heat transfer simultaneously, so the good directionality of conducting heat, the adaptability during application is also relatively good.

3, cooperate with the installation of other parts conveniently, be easy to dismounting, installation, care and maintenance.

4, long service life, particularly then not only economical for long-term and continuous user, so and owing to do not have the good reliability of dielectric leakage problem equipment.

Description of drawings

Below in conjunction with accompanying drawing the present invention is described further.

Fig. 1 is structural representation of the present invention (cutaway view).

Fig. 2 is to be example with structure shown in Figure 1, the hot-fluid view when heat pipe radially conducts heat.

Fig. 3 is to be example with structure shown in Figure 1, the hot-fluid view when heat pipe carries out axial heat conduction.

Among the figure: 1. outer pipe shell, 2. in shell, 3. upper cover, 4. low head, 5. heat-pipe working medium, 6. imbibition core, the K. cavity, . the flow range of hot fluid and direction, →. the distribution of heat and direction of transfer.

The specific embodiment

As shown in Figure 1, basic structure of the present invention is: outer pipe shell (1) is similar with the geometry of interior shell (2), and their main axial dimensions are identical, and the main size outer pipe shell (1) radially in relevant position is all greater than interior shell (2).Like this, when they with upper cover (3) with after low head (4) is connected, could between two shells, form a sandwich cavity K.After adopting non-dismountable connected mode (as welding) to make up by these four parts of outer pipe shell (1), interior shell (2), upper cover (3) and low head (4), these four parts become the sleeve pipe with a sandwich cavity K, and its profile can be cylinder, cone and their assembly thereof.For this sleeve pipe can be connected with other parts easily, on the outer wall on outer pipe shell (1) top or on the outer wall on interior shell (2) top, perhaps not only be shaped on the screw thread of preparing to be connected usefulness on the outer wall on outer pipe shell (1) top but also on the outer wall on interior shell (2) top with other parts.Certainly, no matter how the profile of top said part or assembly designs, these part tube walls that need be shaped on screw thread must be cylindrical.

According to the top structure of narrating, as can be seen, after adopting non-dismountable connected mode (as welding) to make up by these four parts of outer pipe shell (1), interior shell (2), upper cover (3) and low head (4), this assembly just becomes the sleeve pipe with a sandwich cavity K, and this cavity K is airtight.We manage heat-pipe working medium (5) and imbibition core (6) are packed in the cavity K again, and cavity K is pumped into high vacuum state.Like this, this assembly-" nozzle " of being made up of jointly outer pipe shell (1), interior shell (2), upper cover (3), low head (4), heat-pipe working medium (5) and imbibition core (6) has just become a complete heat pipe.Be that this nozzle can carry out work and have the characteristic and the function of heat pipe according to the basic principle of heat pipe.

Since this nozzle is a heat pipe, then heat-pipe working medium wherein (5) can adopt under the normal temperature according to the height of the temperature of the hot fluid that flows in the nozzle and be in a liquid state or solid-state medium, as: when the operating temperature of this heat pipe is 250～300 ℃, can adopt water as heat-pipe working medium, 400 ℃ of available naphthalenes in the left and right sides, about 600 ℃ with sodium metal, 700 ℃ of left and right sides available metal lead, or the like; Imbibition core (6) can be arranged on the whole inwalls of cavity K, also can be arranged on the part inwall of cavity K, but should be provided with on the lower inner wall of cavity K at least.For the smaller nozzle of size, general adopt the full groove liquid sucking core of arranging, because this imbibition core is directly to be engraved on the inwall of cavity K, manufacturing process is fairly simple.And, then generally need to adopt silk screen imbibition core for the bigger nozzle of size.

Although the operation principle of heat pipe is a known technology,, here, the heating power when we still underdraw its work with regard to ad hoc structure state of the present invention (conducting heat and mass transfer) process:

As shown in Figure 2, when the fluid that enters this nozzle endoporus is exactly a high-temperature hot fluid, then in the outer wall of shell (2) just be heated comprehensively-it is exactly the evaporator section of heat pipe, at this time, this nozzle is exactly one " the radially heat pipe of Chuan Reing ".Be that the outer wall of heat by interior shell (2) of hot fluid passes to the imbibition core in the cavity K, and make the heat-pipe working medium that is filled in the imbibition core space absorb heat to undergo phase transition and evaporate, take away heat simultaneously; The working medium of gaseous state flows to by cavity K that the tube wall of other shells of low temperature-it is exactly the condensation segment of heat pipe, emits heat simultaneously and is cooled into liquid state; These liquid working medium turn back to the inwall place of interior shell (2)-promptly turn back to evaporator section by the inwall of imbibition core in the cavity K or cavity K again.This process is continuously carrying out of going round and beginning again, and this is also carrying out rapidly and constantly with regard to the transmission that makes heat.

Shown in Figure 3 is another kind of situation, and when the fluid that enters this nozzle endoporus is a cryogen, these fluids only are just to become hot fluid when flowing out in the hole of the inner orifice exit of interior shell (2) and low head (4).At this time, the heating surface of this nozzle is that the place-it is exactly the evaporator section of heat pipe in the aperture of the inner orifice exit of interior shell (2) and low head (4); Other places belong to mostly then that radiating surface-it is exactly the condensation segment of heat pipe; Heat transfer in the cavity K is similar with the situation that mass transport process and the preceding paragraph are narrated, and only is that heat-pipe working medium is evaporated and there is difference the position that is condensed.Because in this case, evaporating section is in the axial end of heat pipe, and the main heat transfer direction of this heat pipe is axial, so this heat pipe is one " heat pipe of axial heat conduction ".Certainly, because the heat pipe of this version just belonged to the typical structure of " radial heat pipe " originally, so, always exist some inevitably and radially conduct heat although the main heat transfer direction has here become axially.Yet this gains everything and lose nothing for this nozzle.

Owing to heat pipe has high heat transfer rate and adapts to the ability that hot-fluid changes,, obtain cooling so have the rapid dissipate heat of nozzle energy after local heating of heat pipe character.The mode of its cooling can be the cooling naturally of nozzle self-radiating face, also can force cooling away from the position of heating surface by means of other cooling mediums." other parts " in mentioned " screw thread that is connected usefulness with other parts " in front both comprised mounting fixing parts, also comprised the additional cooling piece that needs here.

Claims

1, a kind of heat pipe nozzle, comprise outer pipe shell (1), interior shell (2), upper cover (3), low head (4), it is characterized in that: adopt non-dismountable ways of connecting to form a sleeve pipe that has sandwich cavity K by these four parts of outer pipe shell (1), interior shell (2), upper cover (3) and low head (4), and this cavity K is airtight, as to be in a vacuum state space, and heat-pipe working medium (5) and imbibition core (6) are housed in the cavity K.

2, according to the said nozzle of claim 1, it is characterized in that: said imbibition core (6) is arranged on the inwall of cavity K.

3, according to the said nozzle of claim 1, it is characterized in that: be shaped on screw thread on the outer wall on said outer pipe shell (1) or interior shell (2) top.