Drainage type spray head for smoke and fire cutting torch

Abstract

The utility model discloses a drainage type spray head for a smoke and fire cutting torch, and relates to the technical field of petroleum underground cutting equipment, a spray head main body is hollow, two ends of the spray head main body are open, and a drainage plug is installed at a first end in the spray head main body in a limiting mode and can only move towards a direction close to a second end of the spray head main body. The plug is installed at the second end in the spray head body in a limiting mode, a plurality of flow channels communicated with the outside are formed in the middle of the spray head body, the lower ends of the flow channels are communicated with drainage channels, the periphery of the spray head body is sleeved with the beam limiting ring, and extending openings are formed in the positions, corresponding to the flow channels, of the beam limiting ring and are exposed out of the flow channels; after entering the nozzle body through the first end of the nozzle body, the molten jet flow can push the drain plug to move downwards to the position below the flow channel, the molten jet flow can be sprayed out through the flow channel and the extending opening, and when the drain plug moves downwards, water in the nozzle body can be discharged through the flow channel and the extending opening under the action of pressure. The nozzle can meet the dual requirements of nozzle cutting efficiency and structural strength.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum downhole cutting equipment, in particular to a water drainage type nozzle used for a pyrotechnic cutting torch. Background Art

[0002] The pyrotechnic cutting torch is a highly effective tool for cutting metal pipes in extreme underground environments. It utilizes a molten jet generated by the combustion of a high-calorific value, high-momentum compositing agent, ejected through a specialized nozzle, to radially cut metal pipes such as oil pipes. With significant advantages such as low cost, safety, reliability, high efficiency, and smooth cuts, it is an ideal choice for cutting or replacing oil pipes.

[0003] A pyrotechnic cutting torch typically consists of key components such as a cutting nozzle, combustion chamber, and ignition device. The nozzle, as the core component of the tool, is crucial for the shape and velocity of the molten jet, directly impacting cutting quality and efficiency. Furthermore, to ensure the safety of the tool string below the nozzle, the connecting ribs must be sufficiently strong to withstand the impact of high-temperature and high-pressure fluids. Therefore, designing a cutting nozzle that balances functional requirements with structural strength is essential for improving the safety and efficiency of underground operations. Utility Model Content

[0004] The purpose of the utility model is to provide a drainage type nozzle for a pyrotechnic cutting torch, so as to solve the problems existing in the above-mentioned prior art and meet the dual requirements of nozzle cutting efficiency and structural strength.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a drainage type nozzle for a pyrotechnic cutting torch, comprising a nozzle body, a beam ring, a plug and a drain plug, the nozzle body being hollow inside and open at both ends, the drain plug being limitedly installed at a first end inside the nozzle body, and the drain plug can only move in a direction close to the second end of the nozzle body, the plug being limitedly installed at the second end inside the nozzle body, a plurality of flow channels being provided in the middle portion of the nozzle body, and the flow channels being able to connect the interior of the nozzle body with the outside, the lower ends of the flow channels being connected with drainage channels, the beam ring being sleeved on the outer circumference of the nozzle body, and the beam ring being provided with an extension opening at a position corresponding to the flow channel, the extension opening being able to expose the flow channel, after the molten jet enters the nozzle body through the first end of the nozzle body, the drain plug can be pushed downward to be located below the flow channel, and the molten jet can be ejected through the flow channel and the extension opening, and when the drain plug moves downward, the water in the nozzle body can be discharged through the flow channel and the extension opening under the action of pressure.

[0007] 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.

[0008] Preferably, the outer wall of the combustion chamber is provided with a second step surface, and a sealing ring is limitedly connected between the second step surface and the beam ring. The sealing ring is sleeved on the outer wall of the connection between the first end of the nozzle body and the combustion chamber.

[0009] Preferably, large 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.

[0010] Preferably, a small sealing plug is installed between the outer wall of the drain plug and the inner wall of the nozzle body.

[0011] Preferably, the inner ring of the first end of the nozzle body is provided with a limiting step surface, a limiting ring is threadedly connected to the limiting step surface, the limiting ring is located above the drain plug, and the upper end of the limiting ring is provided with a straight groove.

[0012] Preferably, the flow channel is a fan-shaped flow channel, and a plurality of the fan-shaped flow channels are circumferentially arranged around the axis of the nozzle body, each of the flow channels is located on the same plane, and adjacent fan-shaped flow channels are separated by rectangular connecting ribs.

[0013] Preferably, the distance between the fan-shaped flow channel and the upper end surface of the plug is a first distance, the length of the drain plug is a first length, and the first distance is 10 mm to 30 mm greater than the first length.

[0014] Preferably, a pin hole is provided on the side wall of the beam ring, and the beam ring and the nozzle body are connected by a pin passing through the pin hole, and the inner wall of the beam ring and the outer wall of the nozzle body are also fixed by gluing.

[0015] Preferably, the plug includes a large section and a small section, the large section and the small section are transitioned through a conical surface, an annular groove is provided on the outer periphery of the small section, and the annular groove is used to connect a measuring instrument; the plug is non-hollow.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The utility model provides a drainage type nozzle for a pyrotechnic cutting torch, wherein the interior of the nozzle main body is hollow and both ends are open, the drainage plug is limitedly installed at the first end in the nozzle main body, and the drainage plug can only move in the direction close to the second end of the nozzle main body, and the plug is limitedly installed at the second end in the nozzle main body to achieve blocking of the second end of the nozzle main body, the middle part of the nozzle main body is provided with a plurality of flow channels, and the flow channels can connect the interior of the nozzle main body with the outside, the lower end of the flow channel is connected with a drainage channel, the drainage plug can remain sealed in the initial stage, and when the molten jet enters the interior of the nozzle main body, it cooperates with the drainage channel below the flow channel to quickly drain the water; the beam ring is arranged on the outer periphery of the nozzle main body, and the beam ring can The end opening is constrained, and the beam ring is provided with an extension port at the position of the corresponding flow channel, which can expose the flow channel. Through the arrangement of the beam ring and each flow channel, the molten jet can be evenly distributed and the jet shape can be constrained to ensure precise energy-focusing cutting. At the same time, the overall strength is enhanced. After the molten jet enters the nozzle body through the first end of the nozzle body, the molten jet can push the drain plug downward to the bottom of the flow channel under the action of thrust, and then connect the flow channel with the upper part of the nozzle body, so that the molten jet can be ejected through the flow channel and the extension port to cut the target pipe. When the drain plug goes down, it can squeeze the cavity below it, and then discharge the water in the nozzle body through the flow channel and the extension port under the action of pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 This is a schematic structural diagram of the nozzle body of the drainage type nozzle used for the pyrotechnic cutting torch in the utility model;

[0020] Figure 2 A cross-sectional view of a drainage nozzle for a pyrotechnic cutting torch according to the present invention;

[0021] Figure 3 for Figure 2 The sectional view at AA in FIG;

[0022] Figure 4 for Figure 2 Cross-sectional view at BB in FIG;

[0023] Figure 5 This is a schematic diagram of the structure of the plug in the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the beam ring in the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the drain plug in the utility model;

[0026] Figure 8 This is a schematic structural diagram of the limiting ring in the utility model;

[0027] In the figure: 1-nozzle body, 2-beam ring, 3-sealing ring, 4-limiting ring, 5-drain plug, 6-plug, 7-small sealing ring, 8-large sealing ring, 9-drainage channel, 10-flow channel, 11-rectangular connecting rib, 12-pin hole, 13-slotted groove. DETAILED DESCRIPTION

[0028] 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.

[0029] The purpose of the utility model is to provide a drainage type nozzle for a pyrotechnic cutting torch, so as to solve the problems existing in the prior art and meet the dual requirements of nozzle cutting efficiency and structural strength.

[0030] 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.

[0031] like Figures 1-8As shown, this embodiment provides a drainage type nozzle for a pyrotechnic cutting torch, comprising a nozzle body 1, a beam ring 2, a plug 6 and a drain plug 5. The nozzle body 1 is hollow inside and open at both ends. The drain plug 5 is limitedly installed at the first end inside the nozzle body 1, and the drain plug 5 can only move in the direction close to the second end of the nozzle body 1. The plug 6 is limitedly installed at the second end inside the nozzle body 1 to achieve blocking of the second end of the nozzle body 1. A plurality of flow channels 10 are provided in the middle of the nozzle body 1, and the flow channels 10 can connect the inside of the nozzle body 1 with the outside world. The lower end of the flow channel 10 is connected to a drainage channel 9. The drain plug 5 can remain sealed in the initial stage, and when the molten jet enters the inside of the nozzle body 1, it cooperates with the drainage channel 9 below the flow channel 10 to quickly drain water. The cross-section of the drainage channel 9 is U-shaped and can accommodate part of the water; the beam ring 2 is sleeved on the outer surface of the nozzle body 1 The beam ring 2 is provided with an extension port at the position corresponding to the flow channel 10, and the extension port can expose the flow channel 10. The distance between the two is 0.5mm-2mm. Through the arrangement of the beam ring 2 and each flow channel 10, the molten jet can be evenly distributed and the jet shape can be constrained to ensure precise energy-focusing cutting. At the same time, the overall strength is enhanced. After the molten jet enters the nozzle body 1 through the first end of the nozzle body 1, the molten jet can push the drain plug 5 downward to the bottom of the flow channel 10 under the action of thrust, and then connect the flow channel 10 with the upper part of the nozzle body 1, so that the molten jet can be ejected through the flow channel 10 and the extension port to cut the target pipeline. When the drain plug 5 goes down, it can squeeze the cavity below it, and then discharge the water in the nozzle body 1 through the flow channel 10 and the extension port under the action of pressure.

[0032] Specifically, the first end of the nozzle body 1 is used to extend into the combustion chamber to facilitate the molten jet in the combustion chamber to enter the nozzle body 1. The first end of the nozzle body 1 is threadedly connected to the inner wall of the combustion chamber and is detachably connected to facilitate connection and disassembly. The nozzle body 1 is also provided with a first step surface on the outer wall near the first end. One end of the combustion chamber is limited on the first step surface. By limiting the combustion chamber, the connection stability is improved.

[0033] The outer wall of the combustion chamber is provided with a second step surface, and a sealing ring 3 is connected between the second step surface and the beam ring 2 to limit the two ends of the sealing ring 3. The sealing ring 3 is sleeved on the outer wall of the connection between the first end of the nozzle body 1 and the combustion chamber to improve the connection stability of the connection between the first end of the nozzle body 1 and the combustion chamber, and at the same time can seal this connection.

[0034] A large sealing ring 8 is installed between the inner wall of the sealing ring 3 and the outer wall of the nozzle body 1, as well as between the inner wall of the sealing ring 3 and the outer wall of the combustion chamber. The large sealing ring 8 seals the gap between the sealing ring 3 and the nozzle body 1, as well as the gap between the sealing ring 3 and the combustion chamber.

[0035] A small sealing plug is installed between the outer wall of the drain plug 5 and the inner wall of the nozzle body 1 to seal the gap between the drain plug 5 and the nozzle body 1. On the one hand, it can ensure that when the molten jet enters the nozzle body 1, it can push the drain plug 5 downward. On the other hand, it can prevent well water and the like from entering the top of the drain plug 5 through the bottom of the drain plug 5 and affecting normal work.

[0036] The outer wall of the combustion chamber, the outer wall of the nozzle body 1 and the outer wall of the drain plug 5 are all provided with annular grooves, which are used to accommodate the corresponding large sealing ring 8 and small sealing ring 7 respectively.

[0037] The inner ring of the first end of the nozzle body 1 is provided with a limiting step surface, and a limiting ring 4 is threadedly connected to the limiting step surface. The limiting ring 4 is located above the drain plug 5, and the drain plug 5 is limited by the limiting ring 4 to prevent the drain plug 5 from moving upward and sliding out due to water entering the interior when the nozzle body 1 moves downward, thereby affecting the sealing. A straight groove 13 is provided at the upper end of the limiting ring 4, which is convenient for connecting with tools to realize the disassembly and assembly of the limiting ring 4.

[0038] The flow channel 10 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 10 is located on the same plane, that is, multiple flow channels 10 form a circle, and adjacent fan-shaped flow channels are separated by rectangular connecting ribs 11. At the same time, the rectangular connecting ribs 11 also improve the connection strength to ensure that the strength of the integrated structure is maintained.

[0039] The number of the flow channels 10 is three to five, the width of the flow channels 10 is 3 mm to 6 mm, and the width of the rectangular connecting ribs 11 is 4 mm to 8 mm.

[0040] The distance between the fan-shaped flow channel and the upper end surface of the plug 6 is the first distance, the length of the drain plug 5 is the first length, and the first distance is 10mm-30mm greater than the first length, thereby forming a molten pool in the cavity below the flow channel 10, thereby preventing the slag formed by the combustion of the internal charge column from clogging the flow channel 10 after the molten jet enters the interior of the nozzle body 1, affecting the subsequent ejection of the molten jet, and achieving smooth cutting of the target oil pipe.

[0041] The beam ring 2 has pin holes 12 on its sidewalls. Pins pass through these holes to connect the beam ring 2 to the nozzle body 1. The inner wall of the beam ring 2 is secured to the outer wall of the nozzle body 1 by gluing. This is aided by wrapping with a high-temperature-resistant tape, such as polyimide, to enhance connection stability. This prevents relative rotation between the beam ring 2 and the nozzle body 1, which could affect the alignment of the flow channel 10 and the extension port. The outlet of the flow channel 10 should be left clear during wrapping to prevent it from being obstructed by the high-temperature-resistant tape. The beam ring 2 is preferably made of a high-temperature-resistant material, such as graphite, tungsten-copper alloy, or ceramic.

[0042] The beam ring 2 exposes the edge of the flow channel 10 of the nozzle body 1 by 0.5mm-2mm, so that when the molten jet is ejected from the inside, it can avoid being broken by impact and can effectively resist the ablation of the molten jet, achieving a good beam effect, thereby improving energy utilization and enhancing the quality of oil pipe cutting.

[0043] The plug 6 includes a large section and a small section, which are transitioned through a conical surface. The angle of the conical surface is preferably 30°-60°. An annular groove is provided on the outer periphery of the small section for connecting a measuring instrument. The plug 6 is non-hollow.

[0044] In this embodiment, before the nozzle body 1 works, the internal and external environments are isolated under the sealing effect of the drain plug 5, ensuring that the cutting agent, ignition element, etc. are dry and available; when the nozzle body 1 works, the drain plug 5 quickly drains downward under the high pressure of the molten jet, passes through the flow channel 10, and leaves a "molten pool" below it, thereby achieving smooth cutting of the target pipe.

[0045] 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. A drainage nozzle for a pyrotechnic cutting torch, characterized by: The nozzle body includes a nozzle main body, a beam ring, a plug and a drain plug. The nozzle main body is hollow inside and has openings at both ends. The drain plug is limitedly installed at the first end inside the nozzle main body, and the drain plug can only move in the direction close to the second end of the nozzle main body. The plug is limitedly installed at the second end inside the nozzle main body. A plurality of flow channels are provided in the middle part of the nozzle main body, and the flow channels can connect the interior of the nozzle main body with the outside world. The lower end of the flow channel is connected with a drainage channel. The beam ring is sleeved on the outer periphery of the nozzle main body, and the beam ring has an extension opening at a position corresponding to the flow channel, and the extension opening can expose the flow channel. After the molten jet enters the nozzle main body through the first end of the nozzle main body, it can push the drain plug downward to be located below the flow channel, and the molten jet can be ejected through the flow channel and the extension opening. When the drain plug moves downward, it can discharge the water in the nozzle main body through the flow channel and the extension opening under the action of pressure.

2. The drainage nozzle for a pyrotechnic 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 drainage nozzle for a pyrotechnic cutting torch according to claim 2, characterized in that: The outer wall of the combustion chamber is provided with a second step surface, and a sealing ring is limitedly connected between the second step surface and the beam ring. 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 drainage nozzle for a pyrotechnic cutting torch according to claim 3, characterized in that: Large 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 drainage nozzle for a pyrotechnic cutting torch according to claim 1, characterized in that: A small sealing plug is installed between the outer wall of the drain plug and the inner wall of the nozzle body.

6. The drainage nozzle for a pyrotechnic cutting torch according to claim 1, characterized in that: The inner ring of the first end of the nozzle body is provided with a limiting step surface, and a limiting ring is threadedly connected to the limiting step surface. The limiting ring is located above the drain plug, and the upper end of the limiting ring is provided with a straight groove.

7. The drainage nozzle for a pyrotechnic cutting torch according to claim 1, characterized in that: The flow channels are fan-shaped flow channels, and a plurality of the fan-shaped flow channels are circumferentially arranged around the axis of the nozzle body. Each of the flow channels is located on the same plane, and adjacent fan-shaped flow channels are separated by rectangular connecting ribs.

8. The drainage nozzle for a pyrotechnic cutting torch according to claim 7, characterized in that: The distance between the fan-shaped flow channel and the upper end surface of the plug is a first distance, the length of the drain plug is a first length, and the first distance is 10 mm to 30 mm greater than the first length.

9. The drainage nozzle for a pyrotechnic cutting torch according to claim 1, characterized in that: A pin hole is provided on the side wall of the beam ring, and the beam ring and the nozzle body are connected by pins passing through the pin holes, and the inner wall of the beam ring and the outer wall of the nozzle body are also fixed by gluing.

10. The drainage nozzle for a pyrotechnic cutting torch according to claim 1, characterized in that: The plug includes a large section and a small section, the large section and the small section are transitioned through a conical surface, an annular groove is provided on the outer periphery of the small section, and the annular groove is used to connect a measuring instrument; the plug is non-hollow.

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