Integrated nozzle for valveless plasma cutting torch

Abstract

The utility model discloses an integrated nozzle for a valveless plasma cutting torch, which relates to the technical field of petroleum underground cutting equipment and comprises a hollow nozzle main body, a first end of the nozzle main body is open, a second end of the nozzle main body is plugged, a plurality of flow channels are arranged in the middle of the nozzle main body, and a blocking side wall is arranged in each flow channel. The blocking side wall can isolate the interior of the nozzle body from the outside, after molten jet flow enters the nozzle body through the first end of the nozzle body, the blocking side wall can be burnt down, the interior of the nozzle body communicates with the outside, and the molten jet flow can be sprayed out through the flow channel. The utility model has the advantages of simple structure, low cost and high reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum downhole cutting equipment, in particular to an integrated nozzle for a valveless plasma cutting torch. Background Art

[0002] Pyrotechnic cutting technology typically utilizes a jet generated by pyrotechnic powder under high temperature and high pressure to quickly and efficiently cut the target pipeline, effectively resolving the problem of stuck drill pipes in oil pipe strings. A pyrotechnic cutting torch generally consists of an ignition system, a combustion chamber, and a nozzle. The ignition system initiates the cutting process; the combustion chamber generates a high-temperature, high-pressure jet; and the nozzle influences key indicators such as jet shape and energy utilization. Complex operating conditions require dry isolation of the pyrotechnic powder and ignition system in the pyrotechnic cutting torch. However, during cutting, the cutting channel must be quickly exposed to ensure timely ejection of the jet. Therefore, a valve is typically installed at the nozzle outlet for control. However, existing nozzles have complex structures, require high machining precision, and carry the risk of leaks at the seals. This also increases manufacturing costs and makes use and maintenance more difficult, limiting the further promotion and application of pyrotechnic cutting torches. Utility Model Content

[0003] The purpose of the utility model is to provide an integrated nozzle for a valveless plasma cutting torch to solve the problems existing in the above-mentioned prior art, with a simple structure, low cost and high reliability.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides an integrated nozzle for a valveless plasma cutting torch, comprising a nozzle body with a hollow interior, wherein the first end of the nozzle body is open and the second end of the nozzle body is blocked, a plurality of flow channels are provided in the middle of the nozzle body, and each of the flow channels is provided with a barrier side wall, the barrier side wall being capable of isolating the interior of the nozzle body from the outside world, and after a molten jet enters the nozzle body through the first end of the nozzle body, the barrier side wall can be burned to connect the interior of the nozzle body with the outside world, and the molten jet can be ejected through the flow channel.

[0006] Preferably, the first end of the nozzle body is used to extend into the combustion chamber and be threadedly connected to the inner wall of the combustion chamber. The nozzle body is also provided with a first step surface on the outer wall near the first end, and one end of the combustion chamber is limited to the first step surface.

[0007] Preferably, a second step surface is provided between the first step surface and the flow channel, a third step surface is provided on the outer wall of the combustion chamber, and a sealing ring is limitedly connected between the second step surface and the third step surface. The sealing ring is sleeved on the outer wall of the connection between the first end of the nozzle body and the combustion chamber.

[0008] Preferably, sealing rings are installed between the inner wall of the sealing ring and the outer wall of the nozzle body, and between the inner wall of the sealing ring and the outer wall of the combustion chamber.

[0009] Preferably, the second end of the nozzle body is a small cylindrical section, the outer wall of the small cylindrical section is provided with a circle of annular grooves, and the annular grooves are used to connect the instrument located at the second end of the nozzle body; the small cylindrical section is non-hollow.

[0010] Preferably, a transition cone surface is provided on the middle portion of the outer wall of the nozzle body near the small cylindrical section, and a plurality of side vertical surfaces are provided on the transition cone surface, and the side vertical surfaces are used for wrench clamping.

[0011] Preferably, the flow channel is a fan-shaped flow channel, and multiple fan-shaped flow channels are arranged circumferentially around the axis of the nozzle body, each flow channel is located on the same plane, and adjacent fan-shaped flow channels are separated by trapezoidal connecting ribs; the blocking side wall is an arc-shaped side wall, multiple blocking side walls form a circle, and adjacent blocking side walls are separated by trapezoidal connecting ribs; the distance between the flow channel and the inner bottom surface of the nozzle body is 10mm-30mm.

[0012] Preferably, the barrier side wall is located in the middle of the flow channel.

[0013] Preferably, the barrier side wall is located at the inner end of the flow channel, and the barrier side wall is flush with the inner side wall of the nozzle body.

[0014] Preferably, the barrier side wall is located at the outer end of the flow channel, and the barrier side wall is flush with the outer side wall of the nozzle body.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The utility model provides an integrated nozzle for a valveless plasma cutting torch, comprising a nozzle body with a hollow interior, and an opening at the first end of the nozzle body, so that the molten jet in the combustion chamber and other components can enter the nozzle body, the second end of the nozzle body is blocked, and a plurality of flow channels are provided in the middle of the nozzle body to prevent the molten jet from being ejected through the second end of the nozzle body, so that the molten jet can only be ejected through the flow channel to cut the target oil pipe, and each flow channel is provided with a blocking side wall, which can isolate the interior of the nozzle body from the outside, so that the molten jet can enter the nozzle body. Before entering the nozzle body, the barrier side wall is used to block the material in the well, preventing the material in the well from entering the nozzle body through the flow channel and affecting the subsequent ejection of the molten jet. At the same time, the integrated design does not require additional sealing, which can reduce the difficulty of assembly, use and maintenance, and is suitable for mass production. After the molten jet enters the nozzle body through the first end of the nozzle body, it can burn the barrier side wall and connect the inside of the nozzle body with the outside world, so that the molten jet can be ejected through the flow channel to achieve cutting of the target oil pipe. The overall structure is simple, easy to use, low cost and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of the integrated nozzle for the valveless plasma cutting torch in Example 1;

[0019] Figure 2 2. It is a cross-sectional view of the integrated nozzle for the valveless plasma cutting torch in Example 1;

[0020] Figure 3 for Figure 1 Cross-section at AA;

[0021] Figure 4 This is a schematic structural diagram of an integrated nozzle for a valveless plasma cutting torch in Example 2;

[0022] Figure 5 for Figure 4 Cross-section at the middle BB;

[0023] Figure 6 This is a schematic structural diagram of an integrated nozzle for a valveless plasma cutting torch in Example 3;

[0024] Figure 7 for Figure 6 Cross-section at CC;

[0025] In the figure: 1-nozzle body, 2-flow channel, 3-trapezoidal connecting rib, 4-sealing groove, 5-annular groove, 6-sealing ring, 7-sealing ring, 8-combustion chamber, 9-blocking side wall. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model aims to provide an integrated nozzle for a valveless plasma cutting torch to solve the problems existing in the prior art, and has the advantages of simple structure, low cost and high reliability.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Example 1

[0030] like Figure 1-Figure 3 As shown, this embodiment provides an integrated nozzle for a valveless plasma cutting torch, including a nozzle body 1 with a hollow interior, and the first end of the nozzle body 1 is open, so that the molten jet in the combustion chamber 8 and other components can enter the nozzle body 1, the second end of the nozzle body 1 is blocked, and a plurality of flow channels 2 are provided in the middle of the nozzle body 1 to prevent the molten jet from being ejected through the second end of the nozzle body 1, so that the molten jet can only be ejected through the flow channel 2 to cut the target oil pipe, and each flow channel 2 is provided with a blocking side wall 9, which can isolate the interior of the nozzle body 1 from the outside, thereby Before the flow enters the nozzle body 1, the barrier side wall 9 is used to block the material in the well, so as to prevent the material in the well from entering the nozzle body 1 through the flow channel 2 and affecting the subsequent ejection of the molten jet. At the same time, the integrated design does not require additional sealing, which can reduce the difficulty of assembly, use and maintenance, and is suitable for mass production. After the molten jet enters the nozzle body 1 through the first end of the nozzle body 1, it can burn the barrier side wall 9 and connect the inside of the nozzle body 1 with the outside world, so that the molten jet can be ejected through the flow channel 2 to achieve cutting of the target oil pipe. The overall structure is simple, easy to use, low cost and high reliability.

[0031] Specifically, the first end of the nozzle body 1 is designed to extend into the combustion chamber 8 and is threadedly connected to the inner wall of the combustion chamber 8, achieving a detachable connection and facilitating assembly and disassembly. The nozzle body 1 also has a first stepped surface on its outer wall near the first end, with one end of the combustion chamber 8 positioned on the first stepped surface, improving connection stability and facilitating subsequent sealing. Furthermore, due to its simple structure, the nozzle body 1 can be integrated with other components, such as the combustion chamber 8.

[0032] A second step surface is also provided between the first step surface and the flow channel 2, and a third step surface is provided on the outer wall of the combustion chamber 8. A sealing ring 7 is limitedly connected between the second step surface and the third step surface, and the connection between the combustion chamber 8 and the nozzle body 1 is sealed by the sealing ring 7. The sealing ring 7 is sleeved on the outer wall of the connection between the first end of the nozzle body 1 and the combustion chamber 8. At the same time, the sealing ring 7 and the combustion chamber 8, as well as the sealing ring 7 and the nozzle body 1 are all connected by threads, which can further improve the connection stability between the combustion chamber 8 and the nozzle body 1.

[0033] Sealing rings 6 are installed between the inner wall of the sealing ring 7 and the outer wall of the nozzle body 1, and between the inner wall of the sealing ring 7 and the outer wall of the combustion chamber 8. These seal the gaps between the sealing ring 7 and the nozzle body 1, and between the sealing ring 7 and the combustion chamber 8, thereby improving sealing performance. The outer diameter of the nozzle body 1 is slightly reduced above the flow channel 2, and two sealing grooves 4 are formed on the outer wall to accommodate the sealing rings 6.

[0034] The second end of the nozzle body 1 is a small cylindrical section, the outer wall of which is provided with a circle of annular grooves 5 for connecting instruments located at the second end of the nozzle body 1; the small cylindrical section is not hollow.

[0035] The nozzle body 1 is made of high-temperature resistant stainless steel or high-temperature alloys such as nickel-based and molybdenum-based alloys.

[0036] A transition cone is provided in the middle of the outer wall of the nozzle body 1 near the small cylindrical section. The angle of the transition cone is 45 degrees. The transition cone is provided with multiple side elevations for wrench clamping, thereby facilitating operation with a wrench. Preferably, there are four side elevations.

[0037] The flow channel 2 is a radial fan-shaped flow channel, and multiple fan-shaped flow channels are arranged circumferentially around the axis of the nozzle body 1. Each flow channel 2 is located on the same plane, that is, multiple flow channels 2 form a circle, and adjacent fan-shaped flow channels are separated by trapezoidal connecting ribs 3. At the same time, the trapezoidal connecting ribs 3 also realize the connection between the structure above the flow channel 2 and the structure below the flow channel 2, ensuring the strength of the integrated structure; the barrier side wall 9 is an arc-shaped side wall, and multiple barrier side walls 9 form a circle, and adjacent barrier side walls 9 are separated by trapezoidal connecting ribs 3; the distance between the flow channel 2 and the inner bottom surface of the nozzle body 1 is 10mm-30mm, so that the cavity below the flow channel 2 forms a molten pool, thereby avoiding the slag formed by the combustion of the internal charge column after the molten jet enters the interior of the nozzle body 1 to block the flow channel 2, affecting the subsequent ejection of the molten jet. Before operation, the internal and external environments are isolated by the barrier side wall 9. During operation, the molten jet is ejected from the combustion chamber 8, quickly burns the barrier side wall 9 and ejected from the corresponding flow channel 2 to achieve cutting of the target oil pipe.

[0038] The number of the flow channels 2 is preferably three or four, the width of the flow channels 2 is 3 mm-5 mm, and the slope of the trapezoidal connecting ribs 3 is preferably 5°-15°.

[0039] The thickness of the barrier side wall 9 is 0.2 mm to 3 mm, and can be specifically set comprehensively according to the underwater pressure, the intensity of the cutting agent and the material of the nozzle.

[0040] The barrier side wall 9 is located in the middle of the flow channel 2 .

[0041] Example 2

[0042] like Figure 4-Figure 5 As shown, the difference between this embodiment and the first embodiment is that the barrier side wall 9 is located at the inner end of the flow channel 2, and the barrier side wall 9 is flush with the inner wall of the nozzle body 1. The area of ​​the barrier side wall 9 is small, which is more conducive to saving energy and rapid ejection of the jet, and is suitable for clean working environments such as dry wells or clear water wells.

[0043] Example 3

[0044] like Figure 6-Figure 7 As shown, the difference between this embodiment and the first embodiment is that the barrier side wall 9 is located at the outer end of the flow channel 2, and the barrier side wall 9 is flush with the outer wall of the nozzle body 1, which can be applied to complex working conditions such as mud and prevent debris from clogging the flow channel 2.

[0045] The position of the blocking side wall 9 can also be set accordingly according to actual working conditions.

[0046] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An integrated nozzle for a valveless plasma cutting torch, characterized by: It includes a nozzle body with a hollow interior, and the first end of the nozzle body is open, the second end of the nozzle body is blocked, a plurality of flow channels are provided in the middle of the nozzle body, and each of the flow channels is provided with a barrier side wall, the barrier side wall can isolate the interior of the nozzle body from the outside world, after the molten jet enters the nozzle body through the first end of the nozzle body, it can burn the barrier side wall and connect the interior of the nozzle body with the outside world, and the molten jet can be ejected through the flow channel.

2. The integrated nozzle for a valveless plasma cutting torch according to claim 1, characterized in that: The first end of the nozzle body is used to extend into the combustion chamber and be threadedly connected to the inner wall of the combustion chamber. The nozzle body is further provided with a first step surface on the outer wall near the first end, and one end of the combustion chamber is limited to the first step surface.

3. The integrated nozzle for a valveless plasma cutting torch according to claim 2, characterized in that: A second step surface is provided between the first step surface and the flow channel, a third step surface is provided on the outer wall of the combustion chamber, a sealing ring is limitedly connected between the second step surface and the third step surface, and the sealing ring is sleeved on the outer wall of the connection between the first end of the nozzle body and the combustion chamber.

4. The integrated nozzle for a valveless plasma cutting torch according to claim 3, characterized in that: Sealing rings are installed between the inner wall of the sealing ring and the outer wall of the nozzle body, and between the inner wall of the sealing ring and the outer wall of the combustion chamber.

5. The integrated nozzle for a valveless plasma cutting torch according to claim 1, characterized in that: The second end of the nozzle body is a small cylindrical section, the outer wall of which is provided with a circle of annular grooves, and the annular grooves are used to connect the instrument located at the second end of the nozzle body; the small cylindrical section is non-hollow.

6. The integrated nozzle for a valveless plasma cutting torch according to claim 5, characterized in that: A transition cone surface is provided at the middle portion of the outer wall of the nozzle body near the small cylindrical section, and a plurality of side vertical surfaces are provided on the transition cone surface, and the side vertical surfaces are used for wrench clamping.

7. The integrated nozzle for a valveless plasma cutting torch according to claim 1, characterized in that: The flow channel is a fan-shaped flow channel, and multiple fan-shaped flow channels are arranged circumferentially around the axis of the nozzle body, each flow channel is located on the same plane, and adjacent fan-shaped flow channels are separated by trapezoidal connecting ribs; the blocking side wall is an arc-shaped side wall, multiple blocking side walls form a circle, and adjacent blocking side walls are separated by trapezoidal connecting ribs; the distance between the flow channel and the inner bottom surface of the nozzle body is 10mm-30mm.

8. The integrated nozzle for a valveless plasma cutting torch according to claim 7, characterized in that: The blocking side wall is located in the middle of the flow channel.

9. The integrated nozzle for a valveless plasma cutting torch according to claim 7, characterized in that: The barrier side wall is located at the inner end of the flow channel, and the barrier side wall is flush with the inner side wall of the nozzle body.

10. The integrated nozzle for a valveless plasma cutting torch according to claim 7, characterized in that: The blocking side wall is located at the outer end of the flow channel, and the blocking side wall is flush with the outer side wall of the nozzle body.

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