CN2340554Y

CN2340554Y - Quick action cutting nozzle

Info

Publication number: CN2340554Y
Application number: CN 98200673
Authority: CN
Inventors: 张发明
Original assignee: Individual
Current assignee: Zhang Faming
Priority date: 1998-01-22
Filing date: 1998-01-22
Publication date: 1999-09-29
Anticipated expiration: 2008-01-22

Abstract

The utility model relates to a quick cutting nozzle, comprising an external sleeve 4 and an inner core 3. The inner core 3 is provided with a high-pressure oxygen path, the external sleeve 4 is provided with a fuel gas path 5, and the front end surface of the cutting nozzle is provided with a central hole 1 which is connected with the high-pressure oxygen path. A plurality of fuel gas leading out slot holes 11 are arranged around the central hole 1, and a plurality of gas curtain holes 2 which are communicated with the fuel gas path 5 are arranged on the periphery of the fuel gas leading out slot holes 11. The utility model can be used for cutting and can shorten preheating time and enhance cutting speed.

Description

Cut fast and chew

The utility model relates to a kind of cutting fast and chews.

Cut that to chew be one of critical piece of cutting torch, it comprises an overcoat and inner core, and inner core has the hyperbaric oxygen passage, and has blast tube in overcoat, have the medium pore that links to each other with described hyperbaric oxygen passage cutting the front end face of chewing, having several combustion gas around medium pore derives slotted eye.During cutting, at first combustion gas is derived slotted eye by combustion gas and draw and light, the workpiece preheating to being cut then treats that drawing hyperbaric oxygen (or cutting oxygen) by medium pore when workpiece reaches cutting temperature carries out cutting operation.Directly contact with the cool ambient air that flows owing to cut the flame of chewing combustion gas derivation slotted eye exit, cause a large amount of heat loss, described workpiece reaches cutting temperature needs quite long preheating time, and has reduced cutting speed.For the cutting torch that uses high heating value combustion gas (as acetylene), its preheating time is shorter relatively, cutting speed is very fast, and for the cutting torch that uses fuel gas with low heat value (as propane, natural gas, liquefied gas), preheating time is then longer, cutting speed is slower, thereby shortens its preheating time, improve cutting speed and just seem even more important.

The purpose of this utility model overcomes above-mentioned the deficiencies in the prior art exactly, provides a kind of cutting fast to chew, and the preheating time when shortening cutting, improves cutting speed.

Of the present utility model cut to chew comprise an overcoat and inner core, inner core has the hyperbaric oxygen passage, and in overcoat, has blast tube, has the medium pore that links to each other with described hyperbaric oxygen passage cutting the front end face of chewing, having several combustion gas around medium pore derives slotted eye, derives the slotted eye periphery in combustion gas and has the air curtain hole that several communicate with described blast tube.

The utility model cuts the combustion gas protection air screen of chewing the air curtain hole can completely cut off combustion gas the derivation gas flame of slotted eye and contacting of cool ambient air, reduce heat or temperature loss that the slotted eye gas flame is derived in combustion gas, and the cutting oxygen flow of protection medium pore is interference-free.Thereby use of the present utility model cutting to chew and to shorten preheating time, improve cutting speed.

Reaching embodiment with reference to the accompanying drawings is further described the utility model.

Fig. 1 is that the utility model cuts the phantom of chewing fast;

Fig. 2 is that the A that chews of cutting shown in Figure 1 is to view;

Fig. 3 is that the utility model cuts the phantom of chewing another embodiment fast;

Fig. 4 is that the B that chews of cutting shown in Figure 3 is to view;

Fig. 5, Fig. 6 represent two kinds of concrete structures of combustion gas derivation slotted eye respectively;

Fig. 7 is to use the action principle figure that cuts fast when chewing cutting of the present utility model.

Be labeled as in the accompanying drawing: 1 medium pore, 2 air curtain holes, 3 inner cores; 4 overcoats, 5 blast tubes, joint behind 6 equal pressures; 7 combustion gas enter the hole, and 8 mix oxygen enters the hole, and 9 hyperbaric oxygen enter the hole; 10 thermal insulation ceramics circles, slotted eye, 12 first preheating sections are derived in 11 combustion gas; 13 cutting oxygen flows; 14 preheat flames, 15 protection air screens, 16 workpiece.

As Fig. 1-shown in Figure 4, of the present utility model cut fast to chew comprise an overcoat 4 and inner core 3, inner core 3 has the hyperbaric oxygen passage, and in overcoat 4, has blast tube 5, has the medium pore 1 that links to each other with described hyperbaric oxygen passage cutting the front end face of chewing, having several combustion gas around medium pore 1 derives slotted eye 11, derives slotted eye 11 peripheries in combustion gas and has the air curtain hole 2 that several communicate with described blast tube 5.

It is on two concentric circles at center that best described combustion gas derivation slotted eye 11 and air curtain hole 2 lay respectively at medium pore 1; so that cutting the time make air curtain hole flame well the shielding protection combustion gas derive the flame of slotted eye and the cutting oxygen flow of medium pore, shown in Fig. 2,4.

In a preferred embodiment of the present utility model, shown in Figure 4 as Fig. 3, the end face of described medium pore 1 protrudes in the end face in described air curtain hole 2, thereby forms first preheating section 12 cutting the front end of chewing.The advantage of this structure is that pre-earlier section obtains preheating when cutting, and heating is cut and chewed, and improves and chews the temperature of intracoelomic cavity combustion gas, and combustion gas is further gasified, and improve the temperature of cutting oxygen flow, thereby shorten preheating time, improves cutting speed.

Preferably the end face of medium pore 1 protrudes in the end face 3-5mm in air curtain hole 2.

Described air curtain hole 2 can be the boundling hole that its Way out points to medium pore 1 axis, shown in Fig. 1,3,7.

Described air curtain hole 2 also can be the parallel hole (end illustrates among the figure) that its Way out is parallel to medium pore 1 axis.

In a preferred structure of the present utility model, described medium pore 1 bellmouth orifice that the stainless steel core that is independent of overcoat 4 forms of serving as reasons is shown in Fig. 1-4.Constitute medium pore 1 with the stainless steel chipware, can prevent to chew the high heat ageing of end, heat-resisting, wear-resisting, improve service life.

Of the present utility model cut fast to chew also comprise joint 6 behind the equal pressure that can be connected with the rear end of overcoat 4, and on the joint 6 of back, thermal insulation ceramics circle 10 is housed, shown in Fig. 1,3.Be provided with combustion gas in the joint 6 and enter hole 7 and mix oxygen and enter hole 8 behind equal pressure, the two all communicates with the interior blast tube 5 of overcoat 4.Also having a hyperbaric oxygen (cutting oxygen) to enter hole 9 on the joint 6 of back links to each other with hyperbaric oxygen (cutting oxygen) passage of inner core 3.On the joint 6 of back, thermal insulation ceramics circle 10 can be set,, scald operator to prevent thermal energy conduction to cutting torch wireway and torch body.

In the utility model, can also replace joint 6 behind the above-mentioned equal pressure with joint behind the jet absorption type, and on joint behind the jet absorption type, also the thermal insulation ceramics circle can be set.

Fig. 7 shows the utility model and cuts the action principle of chewing fast.During cutting operation; at first deriving slotted eye 11 by air curtain hole 2 and combustion gas draws combustion gas and lights; to being cut part 16 preheatings; because the effect of the protection air screen 15 in air curtain hole 2; the preheat flame 14 that slotted eye 11 is derived in combustion gas does not contact with cool ambient air; thereby can reduce the thermal loss of preheat flame 14 greatly, shorten preheating time.When reaching cutting temperature; draw cutting oxygen from medium pore 1; cut; at this moment; the protection air screen 15 in air curtain hole 2 plays protection cutting oxygen flow purity; in addition, protection air screen 15 can also improve stability and " repair and cut " red-hot cut surface of preheat flame, thereby increases substantially cutting performance.

Cutting of utility model of wood chewed the cutting torch that can be used for using high heating value combustion gas (as acetylene), and is specially adapted to use the cutting torch of fuel gas with low heat value (as propane, natural gas, liquefied gas).

Above-mentionedly the description of embodiment just is used to illustrate the utility model, and does not constitute restriction it with reference to accompanying drawing.Be appreciated that on the basis of wooden utility model those skilled in the art can make many modification to it, but do not break away from its essence.

Claims

1, a kind of hydrocarbon fuel gas cuts fast and chews, it comprises an overcoat (4) and inner core (3), inner core (3) has the hyperbaric oxygen passage, and in overcoat (4), has blast tube (5), has the medium pore (1) that links to each other with described hyperbaric oxygen passage cutting the front end face of chewing, having several combustion gas around medium pore (1) derives slotted eye (11), it is characterized in that, derives slotted eye (11) periphery in combustion gas and has the air curtain hole (2) that several communicate with described blast tube (5).

2, according to claim 1 cutting chewed, and it is characterized in that, it is on two concentric circles at center that described combustion gas derivation slotted eye (11) and air curtain hole (2) lay respectively at medium pore (1).

3, chew according to described the cutting of claim 1-2, it is characterized in that, the end face of described medium pore (1) protrudes in the end face in described air curtain hole (2).

4, chew according to described the cutting of claim 1-3, it is characterized in that, the end face of medium pore (1) protrudes in the end face 3-5mm in air curtain hole (2).

5, chew according to described the cutting of one of claim 1-4, it is characterized in that, the boundling hole of medium pore (1) axis is pointed in described air curtain hole (2) for its Way out.

6, chew according to described the cutting of one of claim 1-5, its feature live in, described air curtain hole (2) is parallel to the parallel hole of medium pore (1) axis for its Way out.

7, chew according to described the cutting of one of claim 1-6, it is characterized in that, described medium pore (1) bellmouth orifice that the stainless steel core that is independent of overcoat (4) forms of serving as reasons.

8, chew according to described the cutting of claim 1-7, it is characterized in that, this cuts to chew and also comprises the equal pressure joint (6) that can be connected with the rear end of outer (4), and on back joint (6) thermal insulation ceramics circle (10) is housed.

9, chew according to described the cutting of claim 1-8, it is characterized in that, this cuts to chew and also comprises joint behind the jet absorption type that can be connected with the rear end of overcoat (4), and on this back joint the thermal insulation ceramics circle is housed.