An easily assembled combustion chamber flame tube pre-vaporization tube mounting clamp

Abstract

The application relates to an easily-assembled combustion chamber flame tube pre-evaporation pipe mounting clamp, which comprises a base plate, a positioning disc, a positioning bracket, square shafts and jacks, the edge of the base plate is provided with 10 receiving teeth which are outwardly protruded in the radial direction, and a hollow part is formed between two adjacent receiving teeth; the edge of the positioning disc is uniformly provided with five sliding blocks; square shafts and jacks which can be lifted are arranged on the sliding blocks in the axial direction of the positioning disc, the bottom end of the square shaft is connected with the positioning bracket used for supporting the pre-evaporation pipe; when clamping, five pre-evaporation pipes are arranged on the corresponding positioning brackets, the pre-evaporation pipes are clamped by the jacks and the positioning bracket; then the positioning disc is coaxially arranged above the combustion chamber flame tube, the jacks, the square shafts, the positioning bracket and the pre-evaporation pipes are inserted into the annular cavity of the combustion chamber flame tube, the inlet pipe of the pre-evaporation pipe is inserted into the welding hole at the bottom of the combustion chamber flame tube, and the welding hole and the inlet pipe are welded and fixed in the corresponding hollow part of the base plate.

Description

Technical Field

[0001] This invention relates to the field of aero-engine parts processing technology, and in particular to a combustion chamber flame tube pre-evaporation tube mounting fixture. Background Technology

[0002] The combustion chamber of a certain type of engine is an annular recirculation combustion chamber with a pre-evaporation pipe, and its core component, the flame tube, is a short annular thin-walled structure, such as... Figure 1 As shown, the combustion chamber flame tube is composed of an annular inner wall 11, an arc-shaped bottom wall 13, and an annular outer wall 12. More than ten thousand cooling holes, main combustion holes, and mixed combustion holes are distributed on the surfaces of the annular inner wall 11 and the annular outer wall 12. Ten welding holes 15 are evenly distributed on the arc-shaped bottom wall 13. A narrow annular cavity 14 is formed between the annular inner wall 11 and the annular outer wall 12. Ten pre-evaporation tubes 2 need to be installed in the annular cavity 14 of each combustion chamber flame tube. Figure 2 As shown, the pre-evaporation pipe 2 is a T-shaped three-way pipe, including a connecting pipe 24 and an inlet pipe 21, a first outlet pipe 22, and a second outlet pipe 23 located on the same side of the connecting pipe. The inlet pipe communicates with the middle of the connecting pipe 24. The first outlet pipe 22 and the second outlet pipe 23 are symmetrically arranged on both sides of the inlet pipe 21 and communicate with the ends of the connecting pipe 24. The length of the inlet pipe 21 is greater than the length of the two outlet pipes. The inlet pipe 21 is inserted into the welding hole 15 in the annular cavity 14 and then welded to fix it, so that the outlets of the 20 outlet pipes are evenly distributed in the annular cavity 14. The positional accuracy of the pre-evaporation pipe 2 after welding is critical. If it does not match the nozzle well, it will affect the evaporation rate of fuel in the pre-evaporation pipe 2, thus affecting the OTDF (outlet temperature distribution coefficient) and causing carbon deposits. Meanwhile, the location of the pre-evaporation pipe 2 outlet and the direction of the outlet airflow have a great influence on the main combustion zone. If the outlet of the pre-evaporation pipe 2 is too close to the top of the arc of the flame tube, the residence time of the oil-gas mixture in the pre-evaporation pipe 2 in the main combustion zone will be shortened, which will also disrupt the flow field in the return zone, resulting in incomplete combustion of fuel in the main combustion zone and affecting the OTDF.

[0003] Due to the limited size of the annular cavity 14, it is not possible to directly insert the pre-evaporation tube into the annular cavity 14 by hand and make significant adjustments to the pre-evaporation tube 2 within the annular cavity 14. Therefore, the assembly of the above-mentioned parts is not easy to implement, the processing efficiency is low, and the pass rate is low. Therefore, designing an installation fixture that can insert the pre-evaporation tube into the annular cavity according to a preset position is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a combustion chamber flame tube pre-evaporation tube installation clamp that is simple in structure and easy to assemble.

[0005] To solve the above technical problems, the pre-evaporation pipe mounting clamp for the combustion chamber flame tube easy to assemble is provided, which comprises a base plate, a positioning disc, a positioning bracket, a square shaft and a jackscrew, the edge of the base plate is provided with 10 receiving teeth which are outwardly protruded radially, each receiving tooth is uniformly distributed on the edge of the base plate, and the hollow part is formed between the adjacent two receiving teeth; when the combustion chamber flame tube is coaxially arranged on the base plate, the arc-shaped bottom wall of the combustion chamber flame tube is in contact with the base plate, and each welding hole on the arc-shaped bottom wall is arranged in the hollow part between the adjacent two receiving teeth; the edge of the positioning disc is uniformly provided with 5 sliding blocks which are outwardly protruded radially along the edge of the positioning disc; the square shaft and the jackscrew which can be lifted are arranged on each sliding block in the axial direction of the positioning disc, the bottom end of the square shaft is connected with the positioning bracket, the positioning bracket comprises a connecting part, two support parts are arranged at the two ends of one side of the connecting part, and the hollow area is formed between the two support parts; when clamping, the five pre-evaporation pipes are arranged on the corresponding positioning bracket, the first outlet pipe and the second outlet pipe of each pre-evaporation pipe are arranged on the two support parts, and the inlet pipe is arranged through the hollow area; the bottom end of the jackscrew is arranged above the communication pipe of the pre-evaporation pipe after passing through the sliding block, so that the pre-evaporation pipe is clamped after the jackscrew is lowered; then the positioning disc is coaxially arranged above the combustion chamber flame tube, the jackscrew, the square shaft, the positioning bracket and the pre-evaporation pipe are inserted into the annular cavity of the combustion chamber flame tube, the inlet pipe of the pre-evaporation pipe is inserted into the welding hole at the bottom of the combustion chamber flame tube, and the welding hole and the inlet pipe are welded and fixed in the corresponding hollow part of the base plate; after the welding of the five pre-evaporation pipes is completed, the positioning disc is removed, the jackscrew, the square shaft and the positioning bracket are taken out, and the above-mentioned operation is repeated for clamping the five pre-evaporation pipes to complete the assembly of the ten pre-evaporation pipes.

[0006] Further, the pre-evaporation pipe mounting clamp for the combustion chamber flame tube easy to assemble further comprises a center shaft, the center of the base plate is provided with a base plate center hole, the center of the positioning disc is provided with a positioning disc center hole, the bottom end of the center shaft is arranged in the base plate center hole during assembly, and the positioning disc is connected with the center shaft through the positioning disc center hole, so that the positioning disc and the base plate are coaxially arranged.

[0007] Further, 3-5 positioning tables are arranged on the edge of the base plate in the axial direction, each positioning table is arranged on the receiving teeth which are not adjacent to each other, and screw holes are arranged on each positioning table in the radial direction of the base plate, so that the positioning screw is screwed into the screw hole to limit and fix the combustion chamber flame tube when the combustion chamber flame tube is arranged on the base plate.

[0008] Further, the first limiting groove is arranged on one side of the base plate center hole, the second limiting groove and the third limiting groove are arranged on one side of the positioning disc center hole, the limiting blocks which are matched with the limiting grooves are arranged on the bottom and the top of the center shaft, so that the center shaft is limited after being assembled with the base plate and the positioning disc, the mutual rotation between the positioning disc and the base plate during assembly is avoided, and the alignment of the inlet pipe of the pre-evaporation pipe with the welding hole is affected.

[0009] Further, the angle of the second limiting groove and the third limiting groove on the circumference of the positioning disc is 36°, the positioning disc makes the second limiting groove and the third limiting groove respectively clamped into the limiting clamping block on the top of the center shaft twice, so that the position of the sliding block is different by 36° when the positioning disc is assembled twice, the assembly of the ten pre-evaporation tubes can be quickly completed, the ten pre-evaporation tubes are quickly placed in the corresponding positions, and the assembly efficiency is improved.

[0010] Further, the square shaft includes a square shaft body in the shape of a cuboid, a first square hole is provided through the sliding block, a second square hole is provided in the connecting part of the positioning bracket, the upper part of the square shaft body is inserted into the first square hole, and the lower part of the square shaft body is inserted into the second square hole during assembly, the square hole and the square shaft are matched, the square shaft does not rotate during assembly, the positioning bracket is not deviated, and the inlet pipe alignment welding hole of the pre-evaporation tube is not affected.

[0011] Further, the connecting part of the positioning bracket is further provided with a plug-in hole perpendicular to the second square hole, the plug-in hole is provided through the second square hole, the lower part of the square shaft body is provided with a mounting hole matched with the plug-in hole, when the lower part of the square shaft body is placed in the second square hole, the mounting hole and the plug-in hole are aligned, a plug-in pin is inserted into the mounting hole and the plug-in hole to limit and fix the square shaft and the positioning bracket, the length of the plug-in pin is greater than the length of the plug-in hole, the end of the plug-in pin is placed outside the plug-in hole, after the pre-evaporation tube is welded, the plug-in pin is easily pulled out, and the square shaft and the positioning bracket are separated.

[0012] Further, the upper end face of the supporting part of the positioning bracket is provided with a recessed area matched with the shape of the first outlet pipe and the second outlet pipe of the pre-evaporation tube, so that when the pre-evaporation tube is placed on the positioning bracket, the first outlet pipe and the second outlet pipe can be quickly aligned with the recessed area, and the clamping efficiency is improved.

[0013] Further, the easy-to-assemble combustion chamber flame tube pre-evaporation tube mounting clamp further comprises an arc-shaped clamp, the arc-shaped part at the front end of the clamp is matched with the shape of the communication pipe of the pre-evaporation tube, the tail end of the arc-shaped clamp is provided with a spherical hole with elasticity, the bottom end of the jackscrew is fixedly provided with a ball, and the ball is squeezed into the spherical hole during assembly, so that the jackscrew is connected with the arc-shaped clamp, the arc-shaped clamp can rotate around the ball, and when the jackscrew is inserted into the annular cavity for lifting, the arc-shaped part of the arc-shaped clamp is more easily pressed against the communication pipe of the pre-evaporation tube, and the rotation of the jackscrew does not affect the pre-evaporation tube.

[0014] Further, the outer diameter of the positioning disc is the same as the outer diameter of the annular inner side wall of the combustion chamber flame tube, and the bottom end of the positioning disc is provided with an annular stepped part along the edge, so that when the positioning disc is placed above the combustion chamber flame tube, the annular stepped part of the positioning disc is supported by the annular inner side wall of the combustion chamber flame tube.

[0015] The method for using the easy-to-assemble combustion chamber flame tube pre-vaporization pipe mounting clamp comprises the following steps:

[0016] A, the bottom disc is sleeved on the central shaft, so that the limiting block at the bottom of the central shaft is arranged in the first limiting groove; the combustion chamber flame tube is arranged on the bottom disc, so that the welding hole on the arc-shaped bottom wall is arranged in the hollow part between the two adjacent supporting teeth; the combustion chamber flame tube and the bottom disc are fixed through the positioning bolt.

[0017] B, the corresponding square shaft, sliding block, positioning bracket and positioning disc are assembled, and the first group of five pre-vaporization pipes are respectively supported by the positioning bracket; the top wire is adjusted so that the arc-shaped clamping hoop limits and fixes the pre-vaporization pipes.

[0018] C, the positioning disc is sleeved on the upper part of the central shaft, so that the square shaft, the positioning bracket and the top wire are integrally inserted into the annular cavity; the second limiting groove is in clamping cooperation with the limiting block at the upper part of the central shaft, and the insertion cooperation of the first group of five pre-vaporization pipes and the welding hole is completed.

[0019] D, the inlet pipes inserted into the welding holes are welded and fixed one by one in the hollow part, and the assembly of the first group of five pre-vaporization pipes which are not adjacent to each other is completed.

[0020] E, after the welding of the first group of five pre-vaporization pipes is completed, the insertion pin is pushed out by the tweezers, so that the square shaft and the positioning bracket can be separated; the positioning disc is separated from the central shaft, so that the top wire and the square shaft are extracted from the annular cavity, and then the positioning bracket in the annular cavity is taken out.

[0021] F, the square shaft, the sliding block, the positioning bracket and the positioning disc are assembled again, and the second group of five pre-vaporization pipes are respectively supported by the positioning bracket; the top wire is adjusted so that the arc-shaped clamping hoop limits and fixes the pre-vaporization pipes.

[0022] G, the positioning disc is sleeved on the upper part of the central shaft, so that the square shaft, the positioning bracket and the top wire are integrally inserted into the annular cavity; the third limiting groove is in clamping cooperation with the limiting block at the upper part of the central shaft, and the insertion cooperation of the second group of five pre-vaporization pipes and the welding hole is completed.

[0023] H, the inlet pipes inserted into the welding holes are welded and fixed one by one in the hollow part, and the assembly of the second group of five pre-vaporization pipes is completed.

[0024] I, after the welding of the second group of five pre-vaporization pipes is completed, the insertion pin is pushed out by the tweezers, so that the square shaft and the positioning bracket can be separated; the positioning disc is separated from the central shaft, so that the top wire and the square shaft are extracted from the annular cavity; then the positioning bracket in the annular cavity is taken out, and the bottom disc and the combustion chamber flame tube are separated, and the assembly of all the ten pre-vaporization pipes is completed.

[0025] The technical effects of the application are as follows: (1) The combustion chamber flame tube pre-evaporation pipe mounting clamp of the application, relative to the prior art, sets receiving teeth on the edge of the base plate, so that when the combustion chamber flame tube is placed on the base plate, the receiving teeth support the combustion chamber flame tube, and the welding hole is placed in the hollow part between adjacent receiving teeth, which can reduce the weight of the base plate and facilitate welding; (2) The square shaft, the positioning bracket and the jackscrew are used in cooperation, so that the pre-evaporation pipe can be placed on the positioning bracket before entering the annular cavity and be fixed in position, and the square shaft, the positioning bracket and the jackscrew can be inserted into the annular cavity as a whole; (3) The square shaft cooperates with the sliding block and the positioning bracket through the square hole, which can prevent the positioning bracket from rotating into the annular cavity and affecting the assembly efficiency; (4) The jackscrew cooperates with the clamp and the ball through the arc-shaped part, so that the clamp can be conveniently clamped on the connecting pipe of the pre-evaporation pipe, and the jackscrew will not rotate the pre-evaporation pipe during rotation; (5) The insertion position of the square shaft, the positioning bracket and the jackscrew can be conveniently limited by setting the limiting grooves on the base plate and the positioning disc; (6) The positioning bracket and the square shaft are fixed in position by the insertion pin, so that after the pre-evaporation pipe is welded and fixed, the insertion pin can be conveniently taken out, the positioning bracket and the square shaft are separated, and the positioning bracket and the square shaft can be conveniently taken out from the annular cavity. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described in detail below in combination with the drawings of the specification:

[0027] Figure 1 is a structure schematic diagram of the pre-evaporation pipe in the prior art after the combustion chamber flame tube and the pre-evaporation pipe are assembled;

[0028] Figure 2 is a structure schematic diagram of the pre-evaporation pipe in the prior art after the combustion chamber flame tube and the pre-evaporation pipe are assembled;

[0029] Figure 3 is a cross-sectional structure schematic diagram of the combustion chamber flame tube pre-evaporation pipe mounting clamp of the application and the pre-evaporation pipe after assembly;

[0030] Figure 4 is a top view of the combustion chamber flame tube pre-evaporation pipe mounting clamp of the application and the pre-evaporation pipe after assembly;

[0031] Figure 5 is a structure schematic diagram of the base plate of the application;

[0032] Figure 6 is a structure schematic diagram of the positioning bracket of the application;

[0033] Figure 7 is a structure schematic diagram of the square shaft of the application;

[0034] Figure 8 is a structure schematic diagram of the jackscrew of the application.

[0035] In the diagram: 11. Annular inner wall; 12. Annular outer wall; 13. Arc-shaped bottom wall; 14. Annular cavity; 15. Welding hole; 2. Pre-evaporation pipe; 21. Inlet pipe; 22. First outlet pipe; 23. Second outlet pipe; 24. Connecting pipe; 24. Base plate; 31. Receiving tooth; 32. Hollow part; 33. Positioning platform; 34. Positioning bolt; 35. Center hole of base plate; 36. First limiting groove; 4. Positioning plate; 41. Slider; 42. Pressure plate; 43. Limiting pin; 44. Positioning nut; 45. Screw. 46, fixing pin, first square hole, 47, annular step, 48, U-shaped groove, 49, central shaft, 5, positioning bracket, 61, connecting part, 62, recessed area, 63, second square hole, 64, insertion hole, 65, insertion pin, 66, hollow area, 67, square shaft, 71, threaded section, 72, mounting hole, 73, set screw, 81, clamp, 82, end cap, 83, center hole of positioning plate, 9, second limiting groove, 91, third limiting groove. Detailed Implementation

[0036] Example 1

[0037] like Figures 3 to 8 As shown, the easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture of this embodiment includes a base plate 3, a positioning plate 4, a positioning bracket 6, a central shaft 5, a square shaft 7, and a set screw 8. Ten receiving teeth 31 protrude radially outward from the edge of the base plate 3, with each receiving tooth 31 evenly distributed on the edge of the base plate 3 such that the included angle between two adjacent receiving teeth 31 is 36°, forming a hollow portion 32 between two adjacent receiving teeth 31. Three positioning platforms 33 protrude axially from the edge of the base plate 3, each positioning platform 33 being positioned on a non-adjacent receiving tooth 31. Each positioning platform 33 has a screw hole radially arranged on the base plate 3. When the combustion chamber flame tube is coaxially mounted on the base plate 3, the arc-shaped bottom wall 13 of the combustion chamber flame tube contacts the base plate 3. Each welding hole 15 on the arc-shaped bottom wall 13 is respectively placed in the hollow portion 32 between two adjacent receiving teeth 31, and the screw holes... The combustion chamber flame tube is fixed by screwing in the positioning bolt 34. Five sliders 41 are evenly distributed on the edge of the positioning plate 3. Each slider 41 protrudes radially outward from the edge of the positioning plate 4 and can slide radially along the positioning plate 4 to adjust its position. The positioning plate 4 is provided with a pressure plate 42 with a U-shaped groove 49. The two sides of the U-shaped groove 49 of each pressure plate 42 are fixedly connected to the positioning plate 4 by screws 45. The sliders 41 are pressed into the U-shaped groove 49 of the pressure plate 42. Each slider 41 and the positioning plate 4 are also provided with the same through hole. When the slider 41 moves to the point where the through hole on the slider 41 is aligned with the through hole on the positioning plate 4, the limiting pin 43 is used to limit the slider 41 and the positioning plate 4 to prevent the slider 41 from sliding radially along the positioning plate 4. However, the slider 41 can rotate around the limiting pin 43 under the action of external force to make fine adjustments to the position of the slider 41.

[0038] The square shaft 7 is arranged axially on the positioning disc 4 along the upper side of each sliding block 41, and the bottom end of the square shaft 7 is connected to the positioning bracket 6. The positioning bracket 6 comprises a connecting portion 61, both ends of one side of the connecting portion 61 are provided with support portions 62, and a hollow area 67 is formed between the two support portions 62. The upper end surface of the support portion 62 is provided with a recessed area 63 which is matched with the shape of the first outlet pipe 22 and the second outlet pipe 23 of the pre-evaporation pipe 2. When clamping, the pre-evaporation pipe 2 is placed on the corresponding positioning bracket 6, and the first outlet pipe 22 and the second outlet pipe 23 of each pre-evaporation pipe 2 are respectively arranged on the recessed area 63 of the two support portions, and the inlet pipe 21 passes through the hollow area 67.

[0039] The square shaft 7 comprises a square shaft body 71 in the shape of a cuboid, and a threaded segment 72 is arranged at the top of the square shaft body 71. A first square hole 47 is arranged through the sliding block 41, a second square hole 64 is arranged on the connecting portion 61 of the positioning bracket 6, and the connecting portion 61 of the positioning bracket 6 is further provided with a plug-in hole 65 which is perpendicular to the second square hole 64 and is arranged through the second square hole 64. An installation hole 73 which is matched with the plug-in hole 65 is arranged at the lower part of the square shaft body 71. When assembling, the upper part of the square shaft body 71 is inserted into the first square hole 47, the threaded segment 72 passes through the first square hole 47 and is arranged on the upper side of the sliding block 41, and a positioning nut 44 which is matched with the threaded segment 72 is used to limit the square shaft 7 and the sliding block 41, so as to avoid the movement of the square shaft 7. The lower part of the square shaft body 71 is inserted into the second square hole 64, and the square hole and the square shaft 7 are matched, so that the square shaft 7 will not rotate during assembly, which will cause the positioning bracket 6 to deviate and affect the alignment of the inlet pipe 21 of the pre-evaporation pipe 2 for welding. When the lower part of the square shaft body 7 is arranged in the second square hole 64, the installation hole 73 and the plug-in hole 65 are aligned, and a plug-in pin 66 is inserted into the installation hole 73 and the plug-in hole 65 to limit and fix the square shaft 7 and the positioning bracket 6. The length of the plug-in pin 66 is greater than the length of the plug-in hole 65, so that the end of the plug-in pin 66 is arranged outside the plug-in hole 65. After the pre-evaporation pipe 2 is welded, the plug-in pin 66 can be easily pulled out by using an external tweezers, so that the square shaft 7 and the positioning bracket 6 are separated.

[0040] The top pin 8 is threadedly connected with the sliding block 41, the bottom end of the top pin 8 is arranged above the communicating pipe 24 of the pre-evaporation pipe 2 after penetrating the sliding block 41, the bottom end of the top pin 8 is fixedly arranged with a ball 82, the top end of the top pin 8 is fixedly arranged with an end cap 83, the end cap 83 can be rotated to control the lifting of the top pin; the pre-evaporation pipe mounting clamp of the combustion chamber flame tube further comprises a plastic arc-shaped clamp 81 with elasticity, the arc-shaped part at the front end of the clamp 81 is matched with the shape of the communicating pipe 24 of the pre-evaporation pipe, the tail end of the arc-shaped clamp 81 is provided with a spherical hole with elasticity, the ball 82 is squeezed into the spherical hole during assembly, so that the top pin 8 is connected with the plastic arc-shaped clamp 81, and the plastic arc-shaped clamp 81 can rotate around the ball 82, when the top pin 8 is inserted into the annular cavity 14 for lifting, the arc-shaped part of the plastic arc-shaped clamp 81 is more easily pressed against the communicating pipe 24 of the pre-evaporation pipe 2, and the rotation of the top pin 8 will not affect the pre-evaporation pipe 2.

[0041] The center of the bottom disc 3 is provided with a bottom disc center hole 35, one side of the bottom disc center hole 35 is provided with a first limiting groove 36, the center of the positioning disc 4 is provided with a positioning disc center hole 9, one side of the positioning disc center hole 9 is provided with a second limiting groove 91 and a third limiting groove 92, the angles of the second limiting groove 91 and the third limiting groove 92 on the circumference of the positioning disc 4 are different by 36°, the bottom and the top of the center shaft 5 are respectively provided with limiting blocks for clamping with each limiting groove, during assembly, the bottom end of the center shaft 5 is arranged in the bottom disc center hole 35, the limiting block at the bottom of the center shaft is arranged in the first limiting groove 36, and the limiting block at the top of the center shaft 5 is arranged in the second limiting groove 91 or the third limiting groove 92, so that the positioning disc 4 and the bottom disc 3 are coaxially arranged, and the mutual rotation between the positioning disc 4 and the bottom disc 3 during assembly is avoided, and the alignment welding hole of the inlet pipe 24 of the pre-evaporation pipe 2 is affected.

[0042] The outer diameter of the positioning disc 4 is the same as the outer diameter of the annular inner side wall 11 of the combustion chamber flame tube, the bottom end of the positioning disc 4 is provided with an annular stepped part 48 along the edge, so that when the positioning disc 4 is arranged above the combustion chamber flame tube, the annular stepped part 48 of the positioning disc is supported by the annular inner side wall 11 of the combustion chamber flame tube.

[0043] Example 2

[0044] The use method of the above-mentioned pre-evaporation pipe mounting clamp of the combustion chamber flame tube comprises the following steps:

[0045] A, the bottom disc 3 is sleeved on the center shaft 5, so that the limiting block at the bottom of the center shaft 5 is arranged in the first limiting groove 36; the combustion chamber flame tube is arranged on the bottom disc 3, so that the welding hole on the arc-shaped bottom wall 13 is arranged in the hollow part 32 between the adjacent two supporting teeth 31; the combustion chamber flame tube and the bottom disc 3 are fixed through the positioning bolt 34.

[0046] B, the corresponding square shaft 7, slider 41, positioning bracket 6 and positioning disc 5 are assembled, and the first group of 5 pre-evaporation pipes 2 are respectively supported by the positioning bracket 6, and the top wire 8 is adjusted so that the arc-shaped clamp 81 limits and fixes the pre-evaporation pipe 2.

[0047] C, the positioning disc 4 is sleeved on the upper part of the center shaft 5, so that the square shaft 7, the positioning bracket 6 and the top wire 8 are integrally inserted into the annular cavity 14, the second limiting groove 91 is in clamping and fitting with the limiting block on the upper part of the center shaft 5, and the plug-in fitting of the first group of 5 pre-evaporation pipes 2 and the welding hole is completed.

[0048] D, the inlet pipe 21 inserted into the welding hole is welded and fixed one by one in the hollow part 32, and the assembly of the first group of 5 pre-evaporation pipes 2 which are not adjacent to each other is completed.

[0049] E, after the welding of the first group of 5 pre-evaporation pipes 2 is completed, the plug-in pin 66 is pushed out by the tweezers, so that the square shaft 7 and the positioning bracket 6 can be separated, the positioning disc 4 is separated from the center shaft 5, the top wire 8 and the square shaft 7 are pulled out of the annular cavity 14, and then the positioning bracket 6 in the annular cavity 14 is taken out.

[0050] F, the square shaft 7, the slider 41, the positioning bracket 6 and the positioning disc 5 are assembled again, and the second group of 5 pre-evaporation pipes 2 are respectively supported by the positioning bracket 6, and the top wire 8 is adjusted so that the arc-shaped clamp 81 limits and fixes the pre-evaporation pipe 2 again.

[0051] G, the positioning disc 4 is sleeved on the upper part of the center shaft 5, so that the square shaft 7, the positioning bracket 6 and the top wire 8 are integrally inserted into the annular cavity 14, the third limiting groove 92 is in clamping and fitting with the limiting block on the upper part of the center shaft 5, and the plug-in fitting of the second group of 5 pre-evaporation pipes 2 and the welding hole is completed.

[0052] H, the inlet pipe 21 inserted into the welding hole is welded and fixed one by one in the hollow part 32, and the assembly of the second group of 5 pre-evaporation pipes 2 is completed.

[0053] I, after the welding of the second group of 5 pre-evaporation pipes 2 is completed, the plug-in pin 66 is pushed out by the tweezers, so that the square shaft 7 and the positioning bracket 6 can be separated, the positioning disc 4 is separated from the center shaft 5, the top wire 8 and the square shaft 7 are pulled out of the annular cavity 14, and then the positioning bracket 6 in the annular cavity 14 is taken out, and the bottom disc 3 and the combustion chamber flame tube are separated, and the assembly of all 10 pre-evaporation pipes 2 is completed.

[0054] In the design of the clamp, according to the distribution position of each welding hole and the size of the annular inner side wall 11, the arc-shaped bottom wall 13 and the annular outer side wall 12, the size of the base plate, the supporting tooth, the first limiting groove, the positioning disc, the second limiting groove, the third limiting groove, the sliding block, the square shaft and the jackscrew are set, and the assembly of the ten pre-evaporation pipes is completed in two groups through twice assembly of the positioning disc, so that the space in the annular cavity is relatively large during assembly, and the assembly difficulty is reduced.

[0055] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the implementation modes do not need to be exhausted here, and the obvious changes or variations extended from the spirit of the present application are still within the protection scope of the present application.

Claims

1. An easy-to-assemble combustion chamber flame tube pre-evaporation tube mounting clamp, characterized in that, The system includes a chassis, a positioning plate, a positioning bracket, a square shaft, and a set screw. The chassis has 10 radially protruding receiving teeth along its edge, evenly distributed along the edge, with a hollow section between adjacent teeth. When the combustion chamber flame tube is coaxially mounted on the chassis, the arc-shaped bottom wall of the combustion chamber flame tube contacts the chassis, with welding holes on the arc-shaped bottom wall positioned within the hollow section between adjacent teeth. The positioning plate has 5 evenly distributed sliders along its edge, each slider protruding radially outwards. Each slider has a square shaft and a liftable set screw along the axial direction of the positioning plate. The bottom end of the square shaft connects to the positioning bracket, which includes a connecting portion with two ends on one side. A support section is not provided, and a hollow area is formed between the two support sections. During clamping, five pre-evaporation tubes are placed on corresponding positioning brackets, and the first and second outlet pipes of each pre-evaporation tube are respectively supported on the two support sections, with the inlet pipe passing through the hollow area. The bottom end of the set screw passes through the slider and is placed above the pre-evaporation tube connecting pipe so that the set screw can clamp the pre-evaporation tube after it descends. Then, the positioning plate is coaxially set above the combustion chamber flame tube, and the set screw, square shaft, positioning bracket, and pre-evaporation tube are inserted into the annular cavity of the combustion chamber flame tube. The inlet pipe of the pre-evaporation tube is inserted into the welding hole at the bottom of the combustion chamber flame tube, and the welding hole and inlet pipe are welded and fixed in the corresponding hollow section of the base plate. It also includes an arc-shaped clamp, the arc-shaped part at the front end of which is adapted to the shape of the pre-evaporation pipe connecting pipe. The tail end of the arc-shaped clamp is provided with an elastic spherical hole. A ball is fixedly provided at the bottom end of the set screw. During assembly, the ball is squeezed into the spherical hole so that the set screw is connected to the arc-shaped clamp, and the arc-shaped clamp can rotate around the ball.

2. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 1, characterized in that, It also includes a central shaft, with a central hole at the center of the chassis and a central hole at the center of the positioning plate. During assembly, the bottom end of the central shaft is placed inside the central hole of the chassis, and the positioning plate is connected to the central shaft through the central hole of the positioning plate, so that the positioning plate and the chassis are coaxially arranged.

3. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 2, characterized in that, The chassis has 3 to 5 positioning platforms protruding axially along its edge. Each positioning platform is located on a non-adjacent receiving tooth, and each positioning platform has a screw hole along the radial direction of the chassis.

4. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 3, characterized in that, A first limiting groove is provided on one side of the center hole of the chassis, a second limiting groove and a third limiting groove are provided on one side of the center hole of the positioning plate, and limiting blocks that engage with each limiting groove are provided at the bottom and top of the central shaft.

5. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 4, characterized in that, The second and third limiting grooves differ in angle by 36° on the circumference of the positioning plate.

6. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 5, characterized in that, The square shaft includes a rectangular square shaft body, a first square hole is provided through the slider, and a second square hole is provided at the connecting part of the positioning bracket. During assembly, the upper part of the square shaft body is inserted into the first square hole, and the lower part of the square shaft body is inserted into the second square hole.

7. The easily assembled combustion chamber flame tube pre-evaporation tube mounting fixture according to claim 6, characterized in that, The connecting part of the positioning bracket is also provided with a plug hole perpendicular to the second square hole. The plug hole passes through the second square hole. The lower part of the square shaft body is provided with a mounting hole that matches the plug hole, so that when the lower part of the square shaft body is placed in the second square hole, the mounting hole and the plug hole are aligned. The plug pin is inserted into the mounting hole and the plug hole to limit and fix the square shaft and the positioning bracket.

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