Anode cooling loop structure of a plasma generator

Abstract

The invention discloses an anode cooling loop structure of a plasma generator, wherein a water-dividing sleeve is sleeved between an anode inner tube and an anode outer tube, a left end cap is provided at the left end of the anode inner tube, a flange is fixed on the outside of the left end cap, a welding inner steel wire is welded between the right end inner wall of the water-dividing sleeve and the outer wall of the anode inner tube, a welding outer steel wire is welded between the left end outer wall of the water-dividing sleeve and the inner wall of the anode outer tube, a metal hollow cylinder with a plurality of sealing rings is installed on the inner side of the right end of the anode inner tube, the two ends of the metal hollow cylinder are respectively located on the left and right sides of the welding inner steel wire, a plurality of through holes are opened at the right end of the anode inner tube, the cavity between the water-dividing sleeve, the outer wall of the anode inner tube, the welding inner steel wire and the welding outer steel wire is a liquid inlet cavity, and the cavity between the water-dividing sleeve, the inner wall of the anode outer tube, the welding inner steel wire and the welding outer steel wire is a liquid outlet cavity. The invention has simple structure, excellent heat exchange efficiency, high positioning accuracy, good rigidity and convenient assembly.

Description

Technical Field

[0001] The invention relates to the technical field of plasma generator coal combustion, and in particular to an anode cooling loop structure of a plasma generator. Background Art

[0002] The function of the plasma generator cooling system is to ensure that the plasma generator works at the most suitable temperature. Most of them adopt a forced circulation water cooling system, in which the water circulation channel is an important component. The performance of the water circulation channel directly affects the heat dissipation effect of the plasma generator tube wall, which in turn has a great impact on the stability, economy and reliability of the entire igniter system. With the continuous strengthening of the coal-fired performance of the plasma generator, the heat load is getting higher and higher, the structural requirements for the cooling system are getting higher and higher, and the effect is also more and more important. Under the premise of ensuring that the plasma generator cooling system has sufficient thermal conductivity and strength, convenient production and higher heat dissipation efficiency have become an inevitable trend of development.

[0003] The existing plasma generator anode heat dissipation structure consists of three parts: liquid isolation ribs, liquid inlet cavity and liquid outlet cavity. Therefore, firstly, the inner and outer surfaces of the outer and inner tubes of the anode are spot welded with wire, and the gap is filled with fillers to form two cavities with the annular channels of the outer and inner tubes. Then, the two cavities are connected after flowing through the outer surface of the anode through the waist-shaped hole in the inner tube of the anode. The cooling fluid flows on the outer surface of the anode and in the connecting cavity, the hot plasma jet flows through the inner surface of the anode, and the coolant exchanges heat through the anode wall. The outstanding features of the cooling structure used in the traditional plasma generator device are: (1) the unidirectional flow of the liquid can make the cooling liquid better realize heat exchange with the tube wall; (2) the series connection of the pipeline can make the flow rate stable and the volume small, which is convenient to use. Its disadvantages are as follows: (1) The internal flow channel is narrow and has poor flow characteristics, and the filler is easy to fall and block; (2) In order to ensure the sealing of the cooling liquid chamber, there is a process of forming liquid barrier ribs in its production process, that is, filling the filler, which needs to be manually pounded in. The sealing and heat dissipation capacity of this structure is greatly reduced; (3) The tube wall is too thin and not strong enough, and it is easy to deform when pounding in the filling; (4) Since the catheter is welded, it is easy to corrode and oxidize on the surface, and oxide powder is formed in the liquid, and the pressure of the pipeline is uneven. (5) Under harsh working conditions, if the heat exchange rate of the plasma generator cannot be effectively improved, the temperature will rise rapidly. If the excessive heat is not dissipated in time and the high-load operation is continued, the strength of metal parts such as the anode tube, anode, and anode nozzle will be reduced or even deformed, and the non-metal parts such as the O-ring and silicone pad will be damaged by heat. Because it cannot withstand normal loads, the normal gap between the parts will be destroyed, so that the parts cannot maintain normal sealing, which will damage the entire plasma generator or even scrap it.

[0004] In view of the above-mentioned defects of the prior art, it is urgent to develop a new type of anode cooling loop structure of the plasma generator. Summary of the invention

[0005] The purpose of the present invention is to make up for the defects of the prior art and provide an anode cooling loop structure of a plasma generator, which has the advantages of simple manufacturing process, reliable and durable structure, good heat dissipation performance, etc.

[0006] The present invention is achieved through the following technical solutions:

[0007] A plasma generator anode cooling loop structure comprises an anode inner tube and an anode outer tube, a water-dividing sleeve is sleeved between the anode inner tube and the anode outer tube, the right ends of the anode inner tube and the anode outer tube are welded and connected through an anode inner and outer tube connector, a left end cover is provided at the left end of the anode inner tube, a flange is fixed on the outside of the left end cover, the left end of the anode outer tube is fixedly connected to the flange, a welding inner steel wire is welded between the inner wall of the right end of the water-dividing sleeve and the outer wall of the anode inner tube, a welding outer steel wire is welded between the outer wall of the left end of the water-dividing sleeve and the inner wall of the anode outer tube, and a welding outer steel wire is installed on the inner side of the right end of the anode inner tube A metal hollow cylinder with multiple sealing rings, the two ends of the metal hollow cylinder with multiple sealing rings are respectively located on the left and right sides of the welded inner steel wire, a plurality of through holes are opened at the right end of the anode inner tube, the plurality of through holes are respectively distributed on both sides of the welded inner steel wire and on the anode inner tube containing the metal hollow cylinder, the water-dividing sleeve, the outer wall of the anode inner tube, the cavity between the welded inner steel wire and the welded outer steel wire is the liquid inlet cavity, the water-dividing sleeve, the inner wall of the anode outer tube, the welded inner steel wire and the welded outer steel wire is the liquid outlet cavity, the left end of the liquid inlet cavity is connected to the liquid inlet pipe, and the left end of the liquid outlet cavity is connected to the liquid outlet pipe.

[0008] The flange is first inserted into the left end cover, and after the flange is flush with the end face of the left end cover, the hole of the flange is coupled and connected with the left end of the anode outer tube, and then the periphery is welded and coaxial, and then the end face is welded.

[0009] The diameter of the anode inner tube is Φ50-90mm. The anode inner tube is welded in two sections, and the groove gap between the two sections of the anode inner tube is welded into one piece.

[0010] A water-dividing sleeve welding wire is spot-welded on the outer surface of the front section of the anode inner tube, and the diameter of the water-dividing sleeve welding wire is Φ1.5-3mm, so as to prevent the water-dividing sleeve from being severely deformed during subsequent welding.

[0011] The diameter of the anode outer tube is Φ70-100mm. The anode outer tube is welded in two sections. The right end of the right section of the anode outer tube and the groove gap between the anode inner and outer tube connector are welded around the groove gap, and the left end of the right section of the anode outer tube and the welding outer steel wire are welded around the groove gap.

[0012] The anode inner and outer tube connector, left end cover, anode inner tube, water distribution sleeve, water distribution sleeve welding wire, anode outer tube, flange, liquid outlet pipe, liquid inlet pipe, welding outer steel wire and welding inner steel wire are all made of 304 stainless steel.

[0013] The coolant enters the liquid inlet cavity from the liquid inlet pipe, flows from the left end of the liquid inlet cavity to the right end of the liquid inlet cavity, and then flows from the through hole located on the left side of the welding inner steel wire into the cavity between the hollow cylinders with multiple sealing rings, and then flows from the through hole located on the right side of the welding inner steel wire to the right end of the liquid outlet cavity, and then flows to the left end of the liquid outlet cavity, and finally flows out from the liquid outlet pipe to achieve the purpose of cooling.

[0014] The advantages of the present invention are:

[0015] 1) Uniform parts specifications, simple structure, high positioning accuracy, good rigidity and easy assembly.

[0016] 2) It has strong adaptability, is easy to manufacture and install, and each part has independent and clear functions, which is conducive to manufacturing and testing. The cooling and liquid-conducting cavity is connected without welding, which can give full play to the excellent thermal conductivity of the material without additional thermal resistance.

[0017] 3) The circular pipeline has good flow characteristics. The series connection of pipelines can increase the liquid flow rate. There is no filler falling and clogging. The pipeline has high pressure bearing capacity, which improves the reliability of the cooling method and has high anti-deformation ability.

[0018] 4) It enables the flowing heat-conducting medium to better achieve heat exchange with the pipe wall, enhances environmental adaptability, has good connectivity and mechanical strength, high fatigue resistance, eliminates leakage caused by artificial potting, and effectively improves the sealing of the heat-conducting medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the present invention.

[0020] Figure 2 It is a left sectional view of the present invention.

[0021] Figure 3 It is a cross-sectional view of the present invention.

[0022] Figure 4 It is an enlarged view of the left end of the present invention.

[0023] Figure 5 It is an enlarged view of the right end of the present invention. DETAILED DESCRIPTION

[0024] like Figure 1 , 2, 3, 4, and 5, an anode cooling circuit structure of a plasma generator comprises an anode inner tube 1 and an anode outer tube 2, a water dividing sleeve 3 is sleeved between the anode inner tube 1 and the anode outer tube 2, the right ends of the anode inner tube 1 and the anode outer tube 2 are fixedly connected by an anode inner and outer tube connector 4, a left end cover 5 is provided at the left end of the anode inner tube 1, a flange 6 is fixed on the outside of the left end cover 5, the left end of the anode outer tube 2 is fixedly connected to the flange 6, a welding inner steel wire 7 is welded between the inner wall of the right end of the water dividing sleeve 3 and the outer wall of the anode inner tube 1, a welding outer steel wire 8 is welded between the outer wall of the left end of the water dividing sleeve 3 and the inner wall of the anode outer tube 2, and a welding inner wire 7 is installed on the inner side of the right end of the anode inner tube 1. There is a metal hollow cylinder 9 with multiple sealing rings, and both ends of the metal hollow cylinder 9 with multiple sealing rings are located on the left and right sides of the welded inner steel wire 7. A plurality of through holes 10 are opened at the right end of the anode inner tube 1. The plurality of through holes 10 are respectively distributed on the anode inner tube 1 between the welded inner steel wire 7 and the metal hollow cylinder 9 with multiple sealing rings. The water-dividing sleeve 3, the outer wall of the anode inner tube 1, the cavity between the welded inner steel wire 7 and the welded outer steel wire 8 is a liquid inlet cavity, and the cavity between the water-dividing sleeve 3, the inner wall of the anode outer tube 2, the welded inner steel wire 7 and the welded outer steel wire 8 is a liquid outlet cavity. The left end of the liquid inlet cavity is connected to a liquid inlet pipe 11, and the left end of the liquid outlet cavity is connected to a liquid outlet pipe 12.

[0025] The flange 6 is first inserted into the left end cover 5. After the flange 6 is flush with the end surface of the left end cover 5, the hole of the flange 6 is coupled and connected with the left end of the anode outer tube 2, and then the circumference is welded and coaxial, and then the end surface is welded circumferentially.

[0026] The diameter of the anode inner tube 1 is Φ50-90 mm, and the anode inner tube 1 is welded in two sections to ensure reliability during operation. The groove gap between the two sections of the anode inner tube is welded into one piece.

[0027] A water-dividing sleeve welding wire 13 is spot-welded on the front outer surface of the anode inner tube 1, and the diameter of the water-dividing sleeve welding wire 13 is Φ1.5-3mm, so as to prevent the water-dividing sleeve from being severely deformed during subsequent welding.

[0028] The diameter of the anode outer tube 2 is Φ70-100mm. The anode outer tube 2 is welded in two sections to ensure that the welding wire can form an inlet and outlet water channel. The right end of the right section of the anode outer tube 2 and the groove gap between the anode inner and outer tube connector 4 are welded around the groove gap, and the left end of the right section of the anode outer tube 2 and the welding outer steel wire 8 are welded around the groove gap.

[0029] The anode inner and outer tube connector 4, left end cap 5, anode inner tube 1, water distribution sleeve 3, water distribution sleeve welding wire 13, anode outer tube 2, flange 6, liquid outlet pipe 12, liquid inlet pipe 11, welding outer steel wire 8 and welding inner steel wire 7 are all made of 304 stainless steel. The anode inner tube profile is a honed precision tube.

[0030] like Figure 3 As shown, the anode cooling circuit structure device of the plasma generator of the present invention is formed between the anode inner and outer tube connector 4 and the flange 6. The present invention includes the anode inner and outer tube connector 4, the anode inner tube left end cover 5, the anode inner tube 1, the water distribution sleeve 3, the anode outer tube 2, the flange 6, the liquid outlet pipe 12, the liquid inlet pipe 11, the welded outer steel wire 8 and the welded inner steel wire 7.

[0031] The liquid inlet cavity formed by the water-dividing sleeve 3, the outer wall of the anode inner tube 1, the welded inner steel wire 7 and the welded outer steel wire 8 and the liquid outlet cavity formed by the water-dividing sleeve 3, the inner wall of the anode outer tube 2, the welded inner steel wire 7 and the welded outer steel wire 8 are the basis for the circulation of the heat-conducting medium, and play a supporting and guiding role. There is no mechanical impact and mutual influence between the connecting parts. The arc visibility is good during welding, which is conducive to observation. The welding wire can accurately align the welding line, and the short weld can be easily achieved. The gap between the liquid inlet cavity and the liquid outlet cavity can ensure the smooth flow of the heat-conducting medium, and the sealing performance basically eliminates the possibility of leakage. It has strong adaptability, convenient manufacturing and installation, and the functions of each part are independent and clear, which is conducive to manufacturing and testing. The cooling liquid-conducting cavity is connected through the welded matching, which can give full play to the excellent thermal conductivity of the material without additional flow resistance.

[0032] The communication channel between the liquid inlet cavity and the liquid outlet cavity adopts a circular ring pipeline, which has good flow characteristics. The series connection of the pipelines can increase the liquid flow, make it smooth and not easy to be dirty and blocked, and the pipeline has a high pressure bearing capacity. In the present invention, preferably, the liquid inlet cavity and the liquid outlet cavity are connected through a plurality of through holes set at the right end of the anode inner tube, so that the liquid inlet and outlet cavities can be connected. In the present invention, by eliminating the need for potting cement, etc., the uncertainty caused by manual operation is eliminated, the overall reliability is improved, and the anti-deformation ability is high.

[0033] The distance between the liquid inlet cavity and the liquid outlet cavity has good mechanical strength and fatigue resistance through the arrangement of the spatial structure, can reduce the repeated scouring of the coolant, and effectively improve the wear resistance of the contact surface.

[0034] The annular gap between the liquid inlet cavity and the liquid outlet cavity is sufficient in the present invention to adapt to the pressure and flow rate of the heat-conducting medium in a wider range, thereby enhancing environmental adaptability.

[0035] The anode inner and outer tube connector 4 is welded to the right end of the anode inner tube 1. The anode inner and outer tube connector 4 plays a positioning and limiting role to prevent the anode inner tube water inlet channel from being oversized and displaced to cause failure.

[0036] The anode outer tube 2 and the welding outer steel wire 8 are integrally welded and fixedly connected to the flange 6. In the present invention, the flange provides a positioning fixing point, thereby improving the stability of the connection.

[0037] In terms of production technology, rapid prototyping based on existing resources can improve efficiency, shorten auxiliary time, improve labor productivity, ensure accuracy, stabilize quality, etc.

[0038] The anode inner tube 1 is a honed profile precision tube, and each part needs to be blunted. During welding, the welding process requirements are: the weld height is 3mm, the weld adopts circumferential welding; the weld is flat and smooth, and welding defects such as slag inclusion and pores are not allowed, and slag removal must be carried out after welding.

[0039] The present invention has the following characteristics: 1) The assembly method and shape are relatively simple, and the symmetry is high. 2) The shape is relatively clear and the size is relatively small, which can ensure the correctness when assembling and welding parts, meet the requirements of reducing welding deformation during product welding, and meet the clearance standards. 3) The position and structure are designed to be reasonable, accurate, and reliable. 4) There is no interference between the positioning device, the tightening device (welding integration), and the movement and transportation device of the heat-conducting medium. 5) The flow is even, which improves the heat exchange capacity, guarantees the cooling performance of the plasma generator to the greatest extent, and then improves the adjustable performance accordingly, effectively avoiding quality defects.

[0040] The anode cooling circuit structure device of the plasma generator of the present invention ensures the sealing of the structure and excellent heat exchange efficiency. Its shape also tries to select a cylindrical surface with a regular outer surface, and rarely selects a complex surface to reduce the difficulty of the entire structure, and minimizes the contact area to avoid difficulties while ensuring reliable performance. In addition, the parts have a regular shape and a simple structure. Most of the parts have uniform specifications and are standardized, and belong to a standard design, which is easy to produce and manufacture.

[0041] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An anode cooling circuit structure of a plasma generator, characterized in that: The invention comprises an anode inner tube and an anode outer tube, a water-dividing sleeve is sleeved between the anode inner tube and the anode outer tube, the right ends of the anode inner tube and the anode outer tube are welded and connected through an anode inner and outer tube connector, a left end cover is arranged at the left end of the anode inner tube, a flange is fixed on the outside of the left end cover, the left end of the anode outer tube is fixedly connected to the flange, an inner welding wire is welded between the inner wall of the right end of the water-dividing sleeve and the outer wall of the anode inner tube, an outer welding wire is welded between the outer wall of the left end of the water-dividing sleeve and the inner wall of the anode outer tube, and a metal air box with a plurality of sealing rings is installed on the inner side of the right end of the anode inner tube. A central cylinder, a metal hollow cylinder with multiple sealing rings, both ends of which are respectively located on the left and right sides of the welded inner steel wire, a plurality of through holes are opened at the right end of the anode inner tube, and the plurality of through holes are respectively distributed on both sides of the welded inner steel wire and on the anode inner tube containing the metal hollow cylinder, the water-dividing sleeve, the outer wall of the anode inner tube, the cavity between the welded inner steel wire and the welded outer steel wire is the liquid inlet cavity, the water-dividing sleeve, the inner wall of the anode outer tube, the welded inner steel wire and the welded outer steel wire is the liquid outlet cavity, the left end of the liquid inlet cavity is connected to the liquid inlet pipe, and the left end of the liquid outlet cavity is connected to the liquid outlet pipe.

2. The anode cooling circuit structure of a plasma generator according to claim 1, characterized in that: The flange is first inserted into the left end cover, and after the flange is flush with the end face of the left end cover, the hole of the flange is coupled and connected with the left end of the anode outer tube, then the circumference is welded and coaxial, and then the end face is welded circumferentially.

3. The anode cooling circuit structure of a plasma generator according to claim 1, characterized in that: The diameter of the anode inner tube is Φ50-90mm. The anode inner tube is welded in two sections, and the groove gap between the two sections of the anode inner tube is welded into one piece.

4. The anode cooling circuit structure of a plasma generator according to claim 3, characterized in that: A water-dividing sleeve welding wire is spot-welded on the outer surface of the front section of the anode inner tube, and the diameter of the water-dividing sleeve welding wire is Φ1.5-3mm.

5. The anode cooling circuit structure of a plasma generator according to claim 1, characterized in that: The diameter of the anode outer tube is Φ70-100mm. The anode outer tube is welded in two sections. The right end of the right section of the anode outer tube and the groove gap between the anode inner and outer tube connector are welded around the groove gap, and the left end of the right section of the anode outer tube and the welding outer steel wire are welded around the groove gap.

6. The anode cooling circuit structure of a plasma generator according to claim 1, characterized in that: The anode inner and outer tube connector, left end cover, anode inner tube, water distribution sleeve, water distribution sleeve welding wire, anode outer tube, flange, liquid outlet pipe, liquid inlet pipe, welding outer steel wire and welding inner steel wire are all made of 304 stainless steel.

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