A continuous rotating detonation flame cutting equipment

Abstract

The present application provides a continuous rotary detonation flame cutting device, which belongs to the field of flame cutting technology and specifically includes: a detonation combustion chamber, a preheating fuel supply device, and a cutting fuel supply device; the detonation combustion chamber includes a support plate, a combustion chamber outer ring fixed on the support plate, and a combustion chamber inner ring, the inner wall of the combustion chamber outer ring converges toward the combustion chamber inner ring at the end away from the support plate to form a flame nozzle, the cutting fuel supply device connects the space between the combustion chamber outer ring and the combustion chamber inner ring, an ignition component is provided in the combustion chamber outer ring, the ignition component ignites the cutting fuel between the combustion chamber outer ring and the combustion chamber inner ring to form a detonation wave ejected from the flame nozzle; the combustion chamber inner ring extends to the flame nozzle, and a through hole is provided in the combustion chamber inner ring extending along the axial direction, the through hole passes through the two end faces of the combustion chamber inner ring and the support plate, and the preheating fuel supply device connects the through hole. The processing scheme of the present application improves the efficiency and cutting quality of flame cutting.

Description

Technical Field

[0001] The present application relates to the field of flame cutting, and in particular to a continuous rotary detonation flame cutting device. Background Art

[0002] Existing flame cutting equipment requires simultaneous introduction of an oxidizer and a reducing agent into the cutting torch to ensure safe ignition. The flame intensity is then adjusted by adjusting the oxidizer flow rate, which takes a long time to adjust. During the cutting process, the kinetic energy of the cutting oxygen flow blows combustion products away from the plate being cut. This results in long preheating and perforation times, slowing cutting speeds. Furthermore, thermal deformation is significant, especially when cutting thin plates, resulting in low cutting accuracy. Non-ferrous metals such as copper and aluminum, as well as stainless steel, cannot be cut. The fuel combustion method is environmentally unfriendly and can cause flashback after cutting due to operator errors, posing a certain safety risk. Summary of the Invention

[0003] In view of this, the present application provides a continuous rotary detonation flame cutting device, which solves the problems in the prior art and improves the efficiency and cutting quality of flame cutting.

[0004] The continuous rotary detonation flame cutting equipment provided in this application adopts the following technical solutions:

[0005] A continuous rotary detonation flame cutting device, comprising: a detonation combustion chamber, a preheating fuel supply device and a cutting fuel supply device;

[0006] The detonation combustion chamber includes a support plate, an outer combustion chamber ring fixed on the support plate, and an inner combustion chamber ring. The outer combustion chamber ring coaxially surrounds the outer circumference of the inner combustion chamber ring. The inner wall of the outer combustion chamber ring converges toward the inner combustion chamber ring at an end away from the support plate to form a flame nozzle. The cutting fuel supply device is connected to the space between the outer combustion chamber ring and the inner combustion chamber ring. An ignition component is provided in the outer combustion chamber ring. After the ignition component ignites the cutting fuel between the outer combustion chamber ring and the inner combustion chamber ring, a detonation wave is formed and ejected from the flame nozzle.

[0007] The combustion chamber inner ring extends to the flame nozzle, and a through hole extending along the axial direction is provided in the combustion chamber inner ring. The through hole passes through both end surfaces of the combustion chamber inner ring and the support plate, and the preheating fuel supply device is connected to the through hole.

[0008] Optionally, the cutting fuel supply device includes an oxidizer supply tank, a reductant supply tank and a premixing chamber, the oxidizer supply tank and the reductant supply tank are connected to the inlet of the premixing chamber, and the outlet of the premixing chamber is connected to the space between the outer ring of the combustion chamber and the inner ring of the combustion chamber.

[0009] Optionally, the space between the outer ring of the combustion chamber and the inner ring of the combustion chamber includes an injection chamber and a combustion chamber cavity that are connected to each other, and the injection chamber and the combustion chamber cavity are arranged in sequence along the flame injection direction. The outlet of the premixing chamber is connected to the injection chamber, and the injection chamber is provided with several outlets distributed circumferentially along the inner ring of the combustion chamber, and the injection chamber is connected to the combustion chamber cavity through several of the outlets.

[0010] Optionally, an atomizing nozzle is installed on the outlet of the injection chamber.

[0011] Optionally, the cutting fuel supply device further includes a pressure-maintaining component, and the injection chamber is provided with a pressure-maintaining inlet connected to the pressure-maintaining component, and the pressure-maintaining component provides a preset air pressure to the injection chamber through the pressure-maintaining inlet.

[0012] Optionally, the preheating fuel supply device includes a reducing agent injection pipe and an oxidant injection pipe, the reducing agent injection pipe and the oxidant injection pipe are coaxially spaced and located in the through hole, and the reducing agent injection pipe is sleeved on the outside of the oxidant injection pipe, one end of the reducing agent injection pipe and the oxidant injection pipe is located at the flame nozzle, and the end of the oxidant injection pipe away from the flame nozzle is placed on the outside of the reducing agent injection pipe.

[0013] Optionally, one end of the reducing agent injection pipe away from the flame nozzle is sealed to the outer wall of the oxidant injection pipe, and an input pipe is connected to the side wall of the reducing agent injection pipe outside the detonation combustion chamber.

[0014] In summary, this application has the following beneficial technical effects:

[0015] Rotating detonation technology is applied to the flame cutting equipment. When the cutting steel plate is preheated to the cutting state, the oxidant and the reducing agent are fully premixed in a certain proportion and then injected into the combustion chamber.

[0016] The flame is ignited in the chamber to form a rotating detonation. The high-temperature flame is ejected through the tail nozzle to melt and cut the cutting metal. At the same time, the generated detonation wave and the ejected airflow work together to strip the combustion products from the metal base material in a timely and efficient manner, greatly reducing the preheating time and piercing time required for flame cutting. In addition, the flame energy is high and there is no need to adjust the flame many times, which improves the efficiency and cutting quality of flame cutting. Due to the joint effect of the detonation wave and the ejected airflow, the thickness of the cuttable plate is also increased.

[0017] After the cutting is completed, the flame is extinguished by cutting off the premixed mixture of oxidant and reducing agent, and injecting the mixture remaining in the injection chamber into the combustion chamber through pressure to burn, thereby extinguishing the flame and avoiding the occurrence of backfire, thereby ensuring the safety and stability of the flame cutting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the continuous rotary detonation flame cutting equipment of this application.

[0020] Explanation of the accompanying reference numerals: 1. Oxidant supply tank; 2. Reductant supply tank; 3. Oxidant supply pipeline; 4. Reductant supply pipeline; 5. Premixing chamber; 6. Mixture supply pipeline; 7. Ignition assembly; 8. Pressure maintaining inlet; 9. Oxidant injection pipe; 10. Reductant injection pipe; 101. Input pipe; 11. Injection chamber; 12. Atomizing nozzle; 13. Combustion chamber outer ring; 14. Combustion chamber inner ring; 15. Combustion chamber cavity; 16. Flame nozzle; 17. Detonation combustion chamber; 18. Support plate. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0022] The following describes the implementation of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be based on different

[0023] The present invention relates to the present invention and its related concepts and applications, and various modifications or changes may be made without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present invention without creative effort shall fall within the scope of protection of the present invention.

[0024] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement an apparatus and / or practice a method. Additionally, any number of aspects other than those described herein may be used.

[0025] 5 It should also be noted that the figures provided in the following embodiments are merely schematic illustrations of the basic concept of the present application. The figures only show components relevant to the present application and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and ratio of each component may be arbitrarily changed, and the component layout may also be more complex.

[0026] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0027] An embodiment of the present application provides a continuous rotary detonation flame cutting device.

[0028] like Figure 1 As shown, a continuous rotary detonation flame cutting device includes: a detonation combustion chamber 17, a preheating fuel supply device and a cutting fuel supply device

[0029] The detonation combustion chamber 17 includes a support plate 18, a combustion chamber inner ring 13 fixed on the support plate 18, and a combustion chamber inner ring 14. The combustion chamber outer ring 13 is coaxially surrounded by the outer circumference of the combustion chamber inner ring 14. The inner wall of the combustion chamber outer ring 13 converges toward the outer wall of the combustion chamber inner ring 14 at the end away from the support plate 18. There is a gap between the collapsed combustion chamber outer ring 13 and the combustion chamber inner ring 14. The port of the collapsed combustion chamber outer ring 13 forms a flame nozzle 16. The cutting fuel supply device connects the space between the combustion chamber outer ring 13 and the combustion chamber inner ring 14. An ignition component 7 is provided in the combustion chamber outer ring 13. The ignition component 7 ignites the cutting fuel between the combustion chamber outer ring 13 and the combustion chamber inner ring 14 to form a detonation wave that is ejected from the flame nozzle 16.

[0030] The combustion chamber inner ring 14 extends to the flame nozzle 16 , and a through hole extending along the axial direction is provided in the combustion chamber inner ring 14 . The through hole passes through both end surfaces of the combustion chamber inner ring 14 and the support plate 18 , and the preheating fuel supply device is connected to the through hole.

[0031] The preheating fuel supply device delivers the preheating fuel to the flame nozzle 16 through the through hole, ignites it at the flame nozzle 16, and changes the temperature of the combustion flame by adjusting the relative amounts of the reducing agent and the oxidizing agent delivered by the preheating fuel supply device to preheat and melt the steel plate to be cut. When the steel plate is melted to a cuttable state. The cutting fuel supply device injects the cutting fuel into the annular combustion chamber cavity 15 composed of the combustion chamber outer ring 13 and the combustion chamber inner ring 14. At this time, the atomized mixture in the combustion chamber cavity 15 is ignited by the ignition component 7. The ignition component 7 is an igniter, which performs detonation combustion in the combustion chamber cavity 15 and forms a detonation wave. The detonation wave is ejected from the flame nozzle 16 at high speed along with the high-temperature flame generated by the combustion, and melts and cuts the steel plate to be cut. At this time, the high-energy detonation wave generated by the combustion blows the melted metal and the formed oxides away from the cut metal plate in time, making the cutting process smoother. Because of the combined effect of the high-energy detonation wave and the ejected airflow, the ability to cut the thickness of the metal plate is improved, and the penetration time of the steel plate during the cutting process is reduced, thereby greatly improving the cutting efficiency.

[0032] The cutting fuel supply device includes an oxidizer supply tank 1, a reductant supply tank 2, and a premixing chamber 5. The oxidizer supply tank 1 and the reductant supply tank 2 communicate with the inlet of the premixing chamber 5, and the outlet of the premixing chamber 5 communicates with the space between the combustion chamber outer ring 13 and the combustion chamber inner ring 14. The oxidizer supply tank 1 communicates with the premixing chamber 5 via an oxidizer supply line 3, the reductant supply tank 2 communicates with the premixing chamber 5 via a reductant supply line 4, and the premixing chamber 5 communicates with the combustion chamber via a mixture supply pipe.

[0033] The space between the combustion chamber outer ring 13 and the combustion chamber inner ring 14 includes an injection chamber 11 and a combustion chamber 15, which are connected to each other. The injection chamber 11 and the combustion chamber 15 are arranged in sequence along the flame injection direction of 15. The outlet of the premixing chamber 5 is connected to the injection chamber 11. The injection chamber 11 is provided with a plurality of outlets distributed along the circumference of the combustion chamber inner ring 14. The injection chamber 11 is connected to the combustion chamber 15 through the plurality of outlets. An annular block surrounding the combustion chamber inner ring 14 is fixed on the inner side of the support plate 18, and an annular cavity is provided within the annular block to form the injection chamber 11.

[0034] Oxidant and reductant in a specific filling ratio are injected from oxidant supply tank 1 and reductant supply tank 2 through oxidant supply line 3 and reductant supply line 4 into oxidant and reductant premixing chamber 5 for mixing. The fully mixed mixture enters injection chamber 11 through mixture supply line 6, generating a certain pressure in injection chamber 11. After further blending in injection chamber 11, the oxidant and reductant mixture is injected into annular combustion chamber 15.

[0035] An atomizing nozzle 12 is installed on the outlet of the injection chamber 11. The oxidant and reducing agent mixture that is further mixed in the injection chamber 11 is injected into the annular combustion chamber 15 through the atomizing nozzle 12. At this time, the atomized mixture in the combustion chamber 15 is ignited by the igniter, and detonation combustion is carried out in the combustion chamber 15 to form a detonation wave.

[0036] The cutting fuel supply device further includes a pressure-maintaining assembly (not shown). The injection chamber 11 is provided with a pressure-maintaining inlet 8 connected to the pressure-maintaining assembly, through which the pressure-maintaining assembly provides a preset air pressure to the injection chamber 11. The pressure-maintaining assembly can be a storage tank containing an inert gas. The inert gas is stored under a certain pressure in the tank and provides pressure to the injection chamber 11 through the pressure-maintaining inlet 8.

[0037] After the cutting is completed, the mixture entering the injection chamber 11 is cut off, and the remaining mixture in the injection chamber 11 is injected into the combustion chamber 15 through the atomizing nozzle 12 under the pressure of the pressure maintaining inlet 8. After the flame is burned, it will automatically go out without backfire, making the entire flame cutting equipment safer and more reliable.

[0038] In one embodiment, the preheating fuel supply device includes a reducing agent injection pipe 10 and an oxidizing agent injection pipe 9. The reducing agent injection pipe 10 and the oxidizing agent injection pipe 9 are coaxially spaced and located in the through hole. The reducing agent injection pipe 10 is sleeved on the outside of the oxidizing agent injection pipe 9. One end of the reducing agent injection pipe 10 and the oxidizing agent injection pipe 9 is located at the flame nozzle 16. The end of the oxidizing agent injection pipe 9 away from the flame nozzle 16 is placed outside the reducing agent injection pipe 10. The end of the reducing agent injection pipe 10 away from the flame nozzle 16 is sealed to the outer wall of the oxidizing agent injection pipe 9. An input pipe 101 is connected to the side wall of the reducing agent injection pipe 10 outside the detonation combustion chamber. The oxidizing agent injected from the oxidizing agent injection pipe 9 and the reducing agent injected from the reducing agent injection pipe 10 are mixed at the flame nozzle 16.

[0039] In one embodiment, the detonation combustion chamber 17 of the present application can be installed on mounting bases of different forms (such as door-type, handheld, etc.) according to actual needs to meet the needs of different scenarios.

[0040] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A continuous rotary detonation flame cutting device, characterized in that: include: Detonation combustion chamber, preheat fuel supply and cutting fuel supply; The detonation combustion chamber includes a support plate, an outer combustion chamber ring fixed on the support plate, and an inner combustion chamber ring. The outer combustion chamber ring coaxially surrounds the outer circumference of the inner combustion chamber ring. The inner wall of the outer combustion chamber ring converges toward the inner combustion chamber ring at an end away from the support plate to form a flame nozzle. The cutting fuel supply device is connected to the space between the outer combustion chamber ring and the inner combustion chamber ring. An ignition component is provided in the outer combustion chamber ring. After the ignition component ignites the cutting fuel between the outer combustion chamber ring and the inner combustion chamber ring, a detonation wave is formed and ejected from the flame nozzle. The combustion chamber inner ring extends to the flame nozzle, and a through hole extending along the axial direction is provided in the combustion chamber inner ring. The through hole passes through both end surfaces of the combustion chamber inner ring and the support plate, and the preheating fuel supply device is connected to the through hole.

2. The continuous rotary detonation flame cutting equipment according to claim 1, characterized in that: The cutting fuel supply device includes an oxidant supply bin, a reductant supply bin and a premixing chamber, wherein the oxidant supply bin and the reductant supply bin are connected to the inlet of the premixing chamber, and the outlet of the premixing chamber is connected to the space between the outer ring and the inner ring of the combustion chamber.

3. The continuous rotary detonation flame cutting equipment according to claim 2, characterized in that: The space between the outer ring of the combustion chamber and the inner ring of the combustion chamber includes an injection chamber and a combustion chamber cavity that are connected to each other. The injection chamber and the combustion chamber cavity are arranged in sequence along the flame injection direction. The outlet of the premixing chamber is connected to the injection chamber. The injection chamber is provided with several outlets distributed circumferentially along the inner ring of the combustion chamber. The injection chamber is connected to the combustion chamber cavity through several of the outlets.

4. The continuous rotary detonation flame cutting equipment according to claim 3, characterized in that: An atomizing nozzle is installed on the outlet of the injection cavity.

5. The continuous rotary detonation flame cutting equipment according to claim 3, characterized in that: The cutting fuel supply device further comprises a pressure maintaining component. The injection chamber is provided with a pressure maintaining inlet connected to the pressure maintaining component. The pressure maintaining component provides a preset air pressure to the injection chamber through the pressure maintaining inlet.

6. The continuous rotary detonation flame cutting equipment according to claim 1, characterized in that: The preheating fuel supply device includes a reducing agent injection pipe and an oxidizing agent injection pipe. The reducing agent injection pipe and the oxidizing agent injection pipe are coaxially spaced and located in the through hole, and the reducing agent injection pipe is sleeved on the outside of the oxidizing agent injection pipe. One end of the reducing agent injection pipe and the oxidizing agent injection pipe is located at the flame nozzle, and the end of the oxidizing agent injection pipe away from the flame nozzle is placed on the outside of the reducing agent injection pipe.

7. The continuous rotary detonation flame cutting equipment according to claim 6, characterized in that: One end of the reducing agent injection pipe away from the flame nozzle is sealedly connected to the outer wall of the oxidant injection pipe, and an input pipe is connected to the side wall of the reducing agent injection pipe outside the detonation combustion chamber.

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