Flame cutting gun with water-cooling spray head

Abstract

A flame cutting gun with a water-cooling nozzle relates to the technical field of flame cutting guns and comprises a cutting gun body, a fixed sleeve, a rotary sleeve and a water outlet pipe. A flame nozzle of the cutting gun body is fixedly connected with a fixed sleeve with two sealed ends, and one end of the fixed sleeve is communicated with a water inlet pipe; a pipe body of the fixed sleeve is rotationally connected with a rotary sleeve; the two ends of the rotary sleeve are sealed, an annular opening surrounding a sleeve body of the fixed sleeve by a circle is formed in the inner wall of the rotary sleeve, and a through hole for correspondingly communicating an inner cavity of the fixed sleeve with an inner cavity of the rotary sleeve is formed in the position, corresponding to the annular opening, of the outer wall of the fixed sleeve; one side of the fixed sleeve communicates with a water outlet pipe; when a workpiece needs to be cooled, the water outlet pipe can be made to deviate from the advancing direction of the cutting gun body by screwing the rotary sleeve, and the situation that cooling water affects flame cutting operation or the cooling water enters a cutting area to cause splashing of molten steel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flame cutting guns, in particular to a flame cutting gun with a water-cooling nozzle. Background Art

[0002] Gas cutting guns are needed to cut the risers after casting. Gas cutting uses the heat released by the combustion of combustible gas and combustion-supporting gas as a heat source to cut metal materials. There are many types of combustible gases, the most common of which is acetylene. The flame temperature generated by the mixture of acetylene and oxygen is as high as 3000-3300℃, which can quickly melt metal and cut it.

[0003] However, high-carbon castings and alloy steels are prone to flame cutting cracks due to their good hardenability. This is because during the gas cutting process, austenite and martensite will undergo a transformation, which can easily generate phase change stress and residual stress. In particular, the riser position of the casting, under the influence of the process heat node and the flow effect, is the part with the worst structure and the largest thermal stress in the entire casting. During the gas cutting process, the riser has a high temperature at the cutting edge and a large temperature difference with the surrounding area, which generates a certain amount of thermal stress. In addition, there is a large residual stress. The two stresses are superimposed on each other, exceeding the strength limit of the casting, and it is easy to generate cracks. Therefore, after flame cutting, the cutting part needs to be quickly cooled to avoid flame cutting cracks. Therefore, those skilled in the art are in urgent need of developing a flame cutting gun with a cooling device.

[0004] A Chinese patent (publication number: CN115609106A) discloses a flame cutting device with water cooling; the patent includes a flame nozzle and a cooling nozzle, the cooling nozzle corresponds to at least one cooling jet line, the flame nozzle corresponds to a cutting jet line, the cooling nozzle is fixedly connected to the flame nozzle, and the cooling point of the cooling jet line on the object to be cut is set near the cutting point of the cutting jet line on the object to be cut; in actual use, it is found that the cooling nozzle of the patent will affect the inclined cutting operation of the flame nozzle, resulting in inflexible use of the flame cutting gun; in addition, during use of the patent structure, cooling water is easy to enter the cutting area, and the cooling water evaporates rapidly when it encounters high temperature to produce gas, causing molten steel to splash, posing a major safety hazard. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a flame cutting gun with a water-cooling nozzle.

[0006] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0007] A flame cutting gun with a water-cooled nozzle comprises a cutting gun body, a fixed sleeve, a rotating sleeve and a water outlet pipe; the flame nozzle of the cutting gun body is tightly connected to a fixed sleeve with sealed ends, one end of the fixed sleeve is connected to a water inlet pipe; the pipe body of the fixed sleeve is rotatably connected to the rotating sleeve; the two ends of the rotating sleeve are sealed, the inner pipe wall of the rotating sleeve is provided with an annular opening around the pipe body of the fixed sleeve, and the outer pipe wall of the fixed sleeve is provided with a through hole corresponding to the annular opening for correspondingly connecting the inner cavity of the fixed sleeve with the inner cavity of the rotating sleeve; one side of the fixed sleeve is connected to the water outlet pipe.

[0008] Preferably, the water outlet of the water outlet pipe is equipped with an inclined nozzle, and the inclined nozzle is directed away from the flame nozzle of the cutting gun body.

[0009] Preferably, the water outlet of the water outlet pipe is equipped with a splash-proof device capable of contacting the workpiece.

[0010] Preferably, the anti-splashing device is a ceramic fiber sliver or an aluminum silicate sliver.

[0011] Preferably, a switch regulating valve is provided at the position where the water outlet pipe is connected corresponding to the rotating sleeve.

[0012] Preferably, the air pipe body of the cutting gun body is provided with a plurality of clips or straps for fixing the water inlet pipe.

[0013] Preferably, there are a plurality of through holes, and the plurality of through holes are arranged in an annular manner at intervals along the tube body of the fixed sleeve.

[0014] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0015] The utility model discloses a flame cutting gun with a water-cooling nozzle, which has a simple structure. The pipe body of the fixed sleeve is rotatably connected with the rotating sleeve. Since the fixed sleeve is coaxial with the flame nozzle of the cutting gun body, the rotating sleeve can rotate along the flame nozzle of the cutting gun body; since the rotating sleeve can rotate along the flame nozzle of the cutting gun body, the rotating sleeve can drive the water outlet pipe to rotate along the flame nozzle of the cutting gun body; when the workpiece needs to be cooled, the water outlet pipe can be turned away from the moving direction of the cutting gun body by twisting the rotating sleeve, so as to avoid the cooling water affecting the flame cutting operation, or the cooling water entering the cutting area to cause the molten steel to splash, thereby effectively improving the safety performance and ensuring the flexibility of the operation of the cutting gun body;

[0016] In addition, the water outlet of the water outlet pipe is equipped with an inclined nozzle and / or the water outlet of the water outlet pipe is equipped with an anti-splashing device that can contact the workpiece to avoid the cooling water from violently colliding with the workpiece, thereby avoiding the splashing of cooling water and preventing the cooling water from splashing into the cutting area, causing the molten steel to splash. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the utility model;

[0019] Figure 3 Schematic diagram of the internal structure of the fixed casing and the rotating casing.

[0020] In the figure: 1. Cutting gun body; 2. Fixed sleeve; 3. Rotating sleeve; 4. Water outlet pipe; 5. Water inlet pipe; 6. Through hole; 7. Anti-splash device; 8. Switch regulating valve; 9. Tilted nozzle. DETAILED DESCRIPTION

[0021] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0022] Embodiment 1, in combination with Figures 1 to 3 , a flame cutting gun with a water-cooled nozzle, comprising a cutting gun body 1, a fixed sleeve 2, a rotating sleeve 3 and a water outlet pipe 4; the flame nozzle position of the cutting gun body 1 is tightly connected with a fixed sleeve 2 with both ends sealed, that is, the fixed sleeve 2 can be tightly sleeved on the position where the flame nozzle of the cutting gun body 1 is connected with the air pipe of the cutting gun body 1, so that the fixed sleeve 2 is coaxial with the flame nozzle of the cutting gun body 1, and the replacement operation of the flame nozzle of the cutting gun body 1 is not affected; one end of the fixed sleeve 2 is connected with a water inlet pipe 5, that is, when in use, cooling water can be introduced into the fixed sleeve 2 through the water inlet pipe 5; it should be noted that the cooling water is pure water, the pH value is between 7.0-8.5, and the water temperature is between 20-50℃;

[0023] The fixed sleeve 2 is rotatably connected to the rotating sleeve 3. Since the fixed sleeve 2 is coaxial with the flame nozzle of the cutting torch body 1, the rotating sleeve 3 can rotate along the flame nozzle of the cutting torch body 1; both ends of the rotating sleeve 3 are sealed, and the inner wall of the rotating sleeve 3 is provided with an annular opening around the fixed sleeve 2. The outer wall of the fixed sleeve 2 is provided with a through hole 6 corresponding to the annular opening for correspondingly connecting the inner cavity of the fixed sleeve 2 with the inner cavity of the rotating sleeve 3, that is, the cooling water in the fixed sleeve 2 can enter the rotating sleeve 3 through the through hole 6 and the annular opening of the inner wall of the rotating sleeve 3; one side of the fixed sleeve 2 is connected with a water outlet pipe 4, that is, the cooling water entering the rotating sleeve 3 can flow along the rotating sleeve 3. The water outlet pipe 4 flows to the part of the workpiece to be cooled; since the rotating sleeve 3 can rotate along the flame nozzle of the cutting torch body 1, the rotating sleeve 3 can drive the water outlet pipe 4 to rotate along the flame nozzle of the cutting torch body 1; when the workpiece needs to be cooled, the rotating sleeve 3 can be screwed to make the water outlet pipe 4 deviate from the moving direction of the cutting torch body 1, so as to avoid the cooling water affecting the flame cutting operation, or the cooling water entering the cutting area to cause the molten steel to splash, which effectively improves the safety performance and ensures the flexibility of the operation of the cutting torch body 1; it should be noted that the straight-line distance between the water outlet of the water outlet pipe 4 and the flame nozzle of the cutting torch body 1 is 20 to 60 mm;

[0024] When in use, the operator can adjust the position of the water outlet pipe 4 according to the moving direction of the cutting gun body 1, and make the water outlet pipe 4 deviate from the moving direction of the cutting gun body 1 by screwing the rotating sleeve 3; when performing flame cutting, the operator can pass cooling water into the fixed sleeve 2 through the water inlet pipe 5, and the cooling water can flow along the water outlet pipe 4 to the part of the workpiece to be cooled, thereby preventing the workpiece from generating flame cutting cracks.

[0025] Embodiment 2: In actual use, it is found that the cooling water sprayed along the water outlet pipe 4 will splash after colliding with the workpiece, and the cooling water will still splash into the area being cut, resulting in the phenomenon of molten steel splashing. Therefore, it is necessary to reduce the flow rate of the cooling water, but the cooling effect will be reduced. In order to solve the above technical problems, this embodiment is further improved;

[0026] Combined with Figures 2-3 , a flame cutting gun with a water-cooling nozzle, which is different from the embodiment 1 in that, on the basis of the embodiment 1, the water outlet of the water outlet pipe 4 is equipped with an inclined nozzle 9, and the inclined nozzle 9 is directed away from the flame nozzle of the cutting gun body 1, and the impact direction of the cooling water is changed by the inclined nozzle 9, thereby effectively reducing the phenomenon of cooling water splashing into the cutting area without reducing the cooling water flow rate;

[0027] The water outlet of the water outlet pipe 4 is equipped with an anti-splashing device 7 that can contact the workpiece. The anti-splashing device 7 is a ceramic fiber cotton strip or an aluminum silicate cotton strip. The ceramic fiber cotton strip or the aluminum silicate cotton strip is a high-temperature resistant flexible material. The ceramic fiber cotton strip or the aluminum silicate cotton strip can directly contact the workpiece. At the same time, the ceramic fiber cotton strip or the aluminum silicate cotton strip can achieve the purpose of drainage, avoiding the cooling water from violently colliding with the workpiece, thereby avoiding the splashing of cooling water.

[0028] Embodiment 3, in combination with Figures 2-3 A flame cutting gun with a water-cooling nozzle, based on embodiment 1 or 2, a switch regulating valve 8 is provided at the position where the water outlet pipe 4 is connected to the rotating sleeve 3, that is, the flow rate of cooling water can be adjusted by the switch regulating valve 8, and the water outlet pipe 4 can be closed by the switch regulating valve 8 when cooling is not required; the air pipe body of the cutting gun body 1 is provided with a plurality of clips or straps for fixing the water inlet pipe 5, which can prevent the water inlet pipe 5 from moving at will and affecting the flame cutting operation.

[0029] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A flame cutting gun with a water-cooled nozzle, characterized by: The invention comprises a cutting torch body (1), a fixed sleeve (2), a rotating sleeve (3) and a water outlet pipe (4); the flame nozzle of the cutting torch body (1) is tightly connected to a fixed sleeve (2) with sealed ends at both ends, and one end of the fixed sleeve (2) is connected to a water inlet pipe (5); the fixed sleeve (2) is rotatably connected to the rotating sleeve (3); the rotating sleeve (3) is sealed at both ends, the inner tube wall of the rotating sleeve (3) is provided with an annular opening around the tube body of the fixed sleeve (2), and the outer tube wall of the fixed sleeve (2) is provided with a through hole (6) at a position corresponding to the annular opening for correspondingly connecting the inner cavity of the fixed sleeve (2) with the inner cavity of the rotating sleeve (3); and one side of the fixed sleeve (2) is connected to the water outlet pipe (4).

2. The flame cutting gun with a water-cooled nozzle as claimed in claim 1, characterized in that: The water outlet of the water outlet pipe (4) is equipped with an inclined nozzle (9), and the inclined nozzle (9) faces away from the flame nozzle of the cutting gun body (1).

3. The flame cutting gun with a water-cooled nozzle as claimed in claim 1, characterized in that: The water outlet of the water outlet pipe (4) is equipped with a splash prevention device (7) capable of contacting the workpiece.

4. The flame cutting gun with a water-cooled nozzle as claimed in claim 3, characterized in that: The anti-splash device (7) is a ceramic fiber cotton strip or an aluminum silicate cotton strip.

5. The flame cutting gun with a water-cooled nozzle as claimed in claim 1, characterized in that: A switch regulating valve (8) is provided at a position corresponding to the connection between the water outlet pipe (4) and the rotating sleeve (3).

6. The flame cutting gun with a water-cooled nozzle as claimed in claim 1, characterized in that: The air pipe body of the cutting gun body (1) is provided with a plurality of clips or straps for fixing the water inlet pipe (5).

7. The flame cutting gun with a water-cooled nozzle as claimed in claim 1, characterized in that: There are a plurality of through holes (6), and the plurality of through holes (6) are arranged in a ring at intervals along the body of the fixed sleeve (2).

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