CN210680741U - Electric heating air pipe of rail flaw detection equipment - Google Patents
Electric heating air pipe of rail flaw detection equipment Download PDFInfo
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- CN210680741U CN210680741U CN201921430610.XU CN201921430610U CN210680741U CN 210680741 U CN210680741 U CN 210680741U CN 201921430610 U CN201921430610 U CN 201921430610U CN 210680741 U CN210680741 U CN 210680741U
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Abstract
The utility model discloses an electric heating air pipe of rail flaw detection equipment, which comprises an air pipe, an electric heating body and an insulation fixing device; the electric heating body is provided with a power supply wiring connected with the electric heating body; the electric heating body is arranged in the air pipe and has a gap with the wall of the air pipe, the insulating fixing device is fixed on the air pipe, the electric heating body is fixedly connected with the insulating fixing device, and a power supply wire is led out of the air pipe through the insulating fixing device; the electric heating body is fixed in the air pipe through the insulating fixing device, and simultaneously, the current flowing through the power supply wiring and the electric heating body is insulated from the air pipe. The utility model has the advantages that: the heat source utilization efficiency and the use safety of the electric hot air pipe are obviously improved, and the volume of the electric hot air pipe is reduced.
Description
Technical Field
The utility model relates to an electric heating air pipe and the method of increasing the thermal efficiency and avoiding electric leakage of rail flaw detection equipment belongs to track traffic equipment technical field.
Background
In the railway flaw detection equipment for detecting the rails by using ultrasonic waves, water is required to be used as a wave transmission medium, the flaw detection equipment is provided with an electric heating air pipe in a cold season easy to freeze and in a wide range of severe cold areas, a fan supplies air to the electric heating air pipe to obtain hot air with the temperature of more than 70-80 ℃, and the obtained hot air is sent into a warm air channel space provided with a medium water pipe to keep the medium water at more than 15-20 ℃, so that the water is ensured to be in a liquid state in a cold external environment.
In the prior art, the used electric heating air pipe is an external heat source air pipe, namely, an electric heating wire is wound on a metal pipe after an insulating layer is covered on the outer surface of the metal pipe, and then an insulating layer is covered on the outer surface of the electric heating wire to form the electric heating metal pipe. The external heat source air pipe is characterized in that heating wires outside the metal pipe heat the metal pipe, and then a fan arranged at one end supplies air into the metal pipe to obtain required hot air.
However, the external air duct with the heat source has the following obvious defects:
1. the thermal efficiency is not high. A considerable part of heat generated by the electric heating wire outside the metal pipe is dissipated to the periphery, the proportion of heat really absorbed by the metal pipe is low, and the heat taken away by wind flowing through the metal pipe is very limited.
2. It is not safe. The high-temperature electric heating wire is arranged outside the tube, although the insulating layer is covered, the heat insulation cannot be realized, the surface temperature is still high, and the scald is easy to touch; and the device is charged because the insulating layer is thin, especially the insulating layer between the heating wire and the metal (too thick and difficult to transfer heat) is easy to be ablated or mechanically damaged.
3. The device is bulky. On one hand, the diameter of the air pipe is naturally increased by covering the heating layer around the outside of the pipe; on the other hand, the thermal efficiency is not high, and the air pipe has to be lengthened to obtain the required total heat.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the existing air pipe with an external heat source has the problems of low heat efficiency and unsafe use.
To the above problem, the utility model provides a technical scheme is:
an electric heating air pipe of rail flaw detection equipment comprises an air pipe, an electric heating body and an insulating fixing device; the electric heating body is provided with a power supply wiring connected with the electric heating body; the electric heating body is arranged in the air pipe and has a gap with the wall of the air pipe, the insulating fixing device is fixed on the air pipe, the electric heating body is fixedly connected with the insulating fixing device, and a power supply wire is led out of the air pipe through the insulating fixing device; the electric heating body is fixed in the air pipe through the insulating fixing device, and simultaneously, the current flowing through the power supply wiring and the electric heating body is insulated from the air pipe.
Further, the air pipe is provided with a mounting opening; the mounting opening is formed in the pipe wall of the air pipe along the axial direction from the port at one end of the air pipe; the mounting opening is provided with a mounting piece matched with the mounting opening; and a first mounting hole and a second mounting hole are formed in the mounting plate along the axial direction of the air pipe.
Furthermore, the insulating fixing device comprises a first ceramic screw sleeve and a second ceramic screw sleeve, the first ceramic screw sleeve and the second ceramic screw sleeve are both provided with a through hole along the axial core line, and the outer parts of the first ceramic screw sleeve and the second ceramic screw sleeve are divided into a fixing platform end and a threaded end; the diameter of the fixed platform end is larger than the diameter of the first mounting hole and the diameter of the second mounting hole of the mounting sheet; the first ceramic screw sleeve and the second ceramic screw sleeve are respectively installed on the first installation hole and the second installation hole of the installation sheet, so that the fixed platform ends of the first ceramic screw sleeve and the second ceramic screw sleeve are both located in the air duct, and the threaded ends of the first ceramic screw sleeve and the second ceramic screw sleeve respectively penetrate through the first installation hole and the second installation hole of the installation sheet and are located outside the air duct.
Furthermore, the electric heating body is a columnar spiral body, and a first fixing pipe and a second fixing pipe are arranged at two ends of the electric heating body; the first fixed pipe and the second fixed pipe are both straight pipes with axial through holes, and both extend out in the radial direction of the spiral of the electric heating body and are parallel to each other; base positioning pieces are arranged at one ends, close to the electric heating body, of the first fixing pipe and the second fixing pipe respectively, and port positioning pieces are arranged at respective ports of the first fixing pipe and the second fixing pipe respectively.
Furthermore, the ceramic screw sleeve is sleeved on the first fixing pipe between the base positioning piece and the port positioning piece of the first fixing pipe; the ceramic screw sleeve is sleeved on the second fixing tube between the base positioning piece and the port positioning piece of the second fixing tube.
Furthermore, the insulation fixing device also comprises an integral fixing nut and an insulation fixing nut; the insulating fixing nut is sleeved at one end, close to the port, of the threaded end of the first ceramic screw sleeve and the threaded end of the second ceramic screw sleeve and is used for screwing in and abutting against port positioning pieces of the first fixing pipe and the second fixing pipe of the electric heating body respectively;
the whole fixing nut is sleeved at one end of the mounting piece, close to the air pipe, of the threaded end of the first ceramic screw sleeve and the threaded end of the second ceramic screw sleeve and used for screwing in and abutting against the mounting piece respectively, and therefore the electric heating body is fixedly connected to the mounting piece together with the first ceramic screw sleeve and the second ceramic screw sleeve.
Further, the insulation fixing device also comprises an insulation cushion bag used for wrapping the port positioning sheet; the insulating pad bag is provided with an elastic bag bottom, an elastic bag body and an elastic necking at the upper part of the elastic bag body; the elastic capsule bottom is provided with a hole which can be sleeved on the first electric heating body fixing tube or the second electric heating body fixing tube.
Furthermore, the power supply wiring of the electric heating body comprises a first external power supply line and a second external power supply line at two ends of the electric heating body
II, performing secondary filtration; the external power line I penetrates through the through hole of the fixing tube I and then extends outwards, and the external power line I and the fixing tube I are connected
High-temperature insulating materials are filled between the tube walls of the first tube; and the second external power line penetrates through the through hole of the second fixed tube and then extends outwards, and high-temperature insulating materials are filled between the second external power line and the tube wall of the second fixed tube.
Further, the electric hot air pipe also comprises a heat insulation plate; the heat insulation plate is provided with a first partition plate hole and a second partition plate hole which can be respectively sleeved on a first fixing pipe and a second fixing pipe of the electric heating body; the heat insulation plate is arranged between a base positioning piece on a first fixed pipe and a second fixed pipe of the electric heating body in the air pipe and a fixed platform end of a first ceramic screw sleeve and a second ceramic screw sleeve, the edges of the two sides of the heat insulation plate are in contact with the inner wall of the air pipe to separate the air pipe into a hot air channel and a cold air channel, the electric heating body is positioned in the hot air channel, and the fixed platform end of the first ceramic screw sleeve and the second ceramic screw sleeve is positioned in the cold air channel.
Furthermore, the fixed table ends of the first ceramic screw sleeve and the second ceramic screw sleeve are provided with radiating fins.
Drawings
FIG. 1 is a schematic view of a hot air duct of an inspection apparatus for rails according to an embodiment;
FIG. 2 is a schematic top view of an air duct according to an embodiment;
FIG. 3 is a schematic perspective view of an electric heater according to an embodiment;
FIG. 4 is a schematic diagram showing a first planar structure of a ceramic screw boss according to an embodiment, which has the same structure as the second ceramic screw boss;
FIG. 5 is a schematic diagram of the right side view of FIG. 1;
FIG. 6 is an exploded view of FIG. 5, primarily illustrating the installation sequence with the components installed in sequence from bottom to top;
FIG. 7 is a schematic plan view of the insulating mattress;
FIG. 8 is a schematic top view of the insulating pad of FIG. 1 without the insulating pad;
FIG. 9 is a schematic right-view structural diagram of the second embodiment;
FIG. 10 is a schematic perspective view of an intermediate thermal barrier according to an embodiment;
fig. 11 is an exploded view of fig. 9, showing the sequence of installation of the various components in sequence from bottom to top.
In the figure: 1. an air duct; 2. an installation port; 3. mounting a sheet; 31. a first mounting hole; 32. a second mounting hole; 4. an electric heating body; 41. fixing a first pipe; 42. a second fixing pipe; 43. a base locator plate; 44. a port locator plate; 5. an insulating pad; 51. an elastic bladder bottom; 52. an elastic bag body; 53. elastic necking; 6. a heat insulation plate; 61. a first clapboard hole; 62. a second clapboard hole; 7. a ceramic screw sleeve I; 8. a second ceramic screw sleeve; 9. a through hole; 10. fixing a platform end; 11. a threaded end; 12. the whole piece is fixed with a nut; 13. an insulating fixing nut; 14. a first external power line; 15. a second power line is externally connected; 16. high-temperature insulating material; 17. a hot air duct; 18. a cold air duct; 19. and a heat sink.
Detailed Description
The invention is further described below with reference to the following examples and figures:
example one
As shown in fig. 1, an electric heating air pipe of a rail flaw detection device comprises an air pipe 1, an electric heating body 4 and an insulation fixing device; a fan for supplying air to the air pipe is also arranged at the air inlet of the air pipe 1; the electric heating body 4 is provided with a power supply wiring connected with the electric heating body; the electric heating body 4 is arranged in the air pipe 1 and has a gap with the pipe wall of the air pipe 1, the insulating fixing device is fixed on the air pipe 1, the electric heating body 4 is fixedly connected with the insulating fixing device, and a power supply wire is led out of the air pipe through the insulating fixing device; the electric heating body 4 is fixed in the air pipe 1 by an insulation fixing device, and simultaneously, the current flowing through the power supply wiring and the electric heating body 4 is insulated from the air pipe 1. Thus, the electric heating body 4 is used as a heat source of the electric hot air pipe and is arranged in the air pipe and limited by the pipe wall of the air pipe 1, the heat leakage and diffusion of the electric heating body 4 are obviously reduced, and cold air pressed by the fan directly flows through the surface of the electric heating body, so that the utilization efficiency of the heat source is obviously improved; meanwhile, the electric heating body 4 is arranged in the air pipe 1 through which the air flow passes and has a gap with the pipe wall of the air pipe 1, so that the temperature of the outer wall of the air pipe is obviously lower than that of the electric heating body, the electric heating body is not easy to touch and scald, the electric heating body 4 is insulated and fixed through the insulating fixing device and is guided to be connected with a power supply, the electric heating body 4 and related devices can be effectively prevented from being electrically leaked to cause electric shock of a human body, and the use safety of the electric heating air pipe.
As shown in fig. 2, the air duct 1 has a mounting opening 2; the mounting port 2 is formed on the pipe wall of the air pipe 1 along the axial direction from the port at one end of the air pipe 1, and is equivalent to a deeper notch formed on the pipe wall of the air pipe; the mounting port 2 is provided with a mounting piece 3 which is matched with the mounting port 2; the mounting piece 3 is provided with a first mounting hole 31 and a second mounting hole 32 along the axial direction of the air duct 1. This is because the space inside the air duct 1 is too small, and the installation of the electric heating element 4 and the related components is difficult. As a preferable method, the electric heating device and the like are mounted on the mounting piece 3, the mounting piece 3 and the electric heating body 4 are respectively inserted into the mounting opening 2 and the air duct 1 from the port at one end of the air duct 1, and then the mounting piece 3 is welded on the mounting opening 2 of the air duct 1. Therefore, the fact that some component is arranged or mounted in the air duct 1 is that the mounting piece 3 is welded behind the mounting opening 2 of the air duct 1.
As shown in fig. 1, 2, 4 and 5, the insulation fixing device comprises a first ceramic screw sleeve 7 and a second ceramic screw sleeve 8, wherein the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are respectively provided with a through hole 9 along an axial core line, and the outer parts of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are divided into a fixing platform end 10 and a threaded end 11; the diameter of the fixed platform end 10 is larger than the diameter of a first mounting hole 31 and the diameter of a second mounting hole 32 of the mounting sheet 3; the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are respectively installed on the first installation hole 31 and the second installation hole 32 of the installation piece 3, so that the fixing platform ends 10 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are both located in the air pipe 1, and the threaded ends 11 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 respectively penetrate through the first installation hole 31 and the second installation hole 32 of the installation piece 3 and then are located outside the air pipe 1.
The first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 have the same structure and are actually a component, and different names are given for convenience of expression; the diameter of the fixing platform end 10 is larger than the diameter of the first mounting hole 31 and the diameter of the second mounting hole 32 of the mounting piece 3, so that the fixing platform end is limited and cannot enter the first mounting hole 31 and the second mounting hole 32, and the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are conveniently fixed on the mounting piece 3 in the subsequent process;
as shown in fig. 3, the electric heating element 4 is a cylindrical spiral body, and two ends of the electric heating element 4 are provided with a first fixing tube 41 and a second fixing tube 42; the first fixed pipe 41 and the second fixed pipe 42 are straight pipes with axial through holes, and both extend out in the radial direction of the spiral of the electric heating body 4 and are parallel to each other; base positioning pieces 43 are arranged at one ends of the first fixing pipe 41 and the second fixing pipe 42 close to the electric heating body 4, and port positioning pieces 44 are arranged at respective ports of the first fixing pipe 41 and the second fixing pipe 42.
The electric heating body 4 is generally designed into a spiral shape, and can also be designed into various shapes, and the general purpose is to increase
The heat dissipation area is large, so that more generated heat can be taken away by wind more timely; the first fixed pipe 41 and the second fixed pipe 42 are balanced and opposite to each other, and products thereof are not necessarily required to be absolutely parallel to each other; for fixing, the first fixing pipe 41 and the second fixing pipe 42 are relatively long, and need to extend out of the outer wall of the air pipe for a certain length during installation.
Preferably, the method comprises the following steps: the first fixing pipe 41 and the second fixing pipe 42 are both copper pipes, the base positioning piece 43 and the port positioning piece 44 are both copper sheets, and the base positioning piece 43 and the port positioning piece 44 are generally fixed on the first fixing pipe 41 and the second fixing pipe 42 respectively in a welding mode. In the actual production and assembly process, the port positioning piece 44 can be welded only after the relevant parts of the electric hot air pipe 1 are installed in place.
The two ends of the electric heating body 4 are provided with a first fixing pipe 41 and a second fixing pipe 42; in fact, the outer tube of the electric heating element 4 is also a copper tube, and the first fixed tube 41 and the second fixed tube 42 are extension tubes of the outer tube of the electric heating element 4 at two ends of the electric heating element 4.
The first ceramic screw sleeve 7 is sleeved on the first fixing tube 41 between the base positioning plate 43 and the port positioning plate 44 of the first fixing tube 41; the second ceramic screw sleeve 8 is sleeved on the second fixing tube 42 between the base positioning plate 43 and the port positioning plate 44 of the second fixing tube 42.
As shown in fig. 3 and 5, in the actual assembly process, the port positioning plate 44 is welded to the first fixed pipe 41 and the second fixed pipe 42 after the installation parts below the port of the threaded end 11 are all installed in place; the ceramic screw boss one 7 is sleeved on the fixing tube one 41 between the base positioning piece 43 and the port positioning piece 44 of the fixing tube one 41, and this feature also indicates that, after the fixing tube one 41 is inserted into the ceramic screw boss one 7, two ends of the fixing tube one 41 are respectively exposed at two ends of the ceramic screw boss one 7. The same is true for the length and position relationship of the second ceramic turnbuckle 8 and the second fixed tube 42.
As shown in fig. 1 and 3, the insulation fixing device further comprises a whole fixing nut 12 and an insulation fixing nut 13; the insulating fixing nut 13 is sleeved at one end, close to the port, of the threaded end 11 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 and is used for screwing in and abutting against port positioning pieces 44 of the first electric heating body fixing pipe 41 and the second electric heating body fixing pipe 42 respectively;
as shown in fig. 1 and 4, the whole fixing nut 12 is sleeved on one end of the mounting piece 3 of the air duct 1, which is close to the threaded end 11 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8, and is used for screwing in and abutting against the mounting piece 3 respectively.
In the above arrangement as shown in fig. 1, 3, 5 and 6, the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 are respectively fixed on the first fixing tube 41 and the second fixing tube 42 of the electric heating body by screwing the insulating fixing nut 13; the first ceramic screw boss 7 and the second ceramic screw boss 8, together with the electric heating body 4 and the first fixing tube 41 and the second fixing tube 42 thereof, are mounted on the mounting plate of the air duct 1 by screwing the whole fixing nut 12.
Preferably, the insulating fixing nut 13 is an insulating ceramic nut, and the whole fixing nut 12 can be a metal nut. When the insulating fixing nut 13 and the integral fixing nut 12 are used for fixing objects, the screwing directions of the insulating fixing nut 13 and the integral fixing nut are opposite.
As shown in fig. 5-7, the insulating fixture further includes an insulating grommet 5 for wrapping the port positioning piece 44; the insulating pad 5 is provided with an elastic bag bottom 51, an elastic bag body 52 and an elastic necking 53 at the upper part of the elastic bag body 52; the elastic bag bottom 51 is provided with a hole which can be sleeved on the first electric heating body fixing tube 41 or the second electric heating body fixing tube 42.
Referring to fig. 3, 5 and 7, since the port positioning pieces 44 on the first fixing tube 41 and the second fixing tube 42 of the electric heating body 4 are metal pieces, in order to prevent short-circuit leakage between the power supply wiring and the positioning pieces, an insulating pad 5 for wrapping the port positioning pieces 44 is provided; in the above arrangement, the elastic bag bottom 51 is located between the insulating fixing nut 13 and the port positioning plate 44, which not only insulates the port positioning plate 44, but also makes the fastened insulating fixing nut 13 not easy to loosen, and is beneficial to fixing the electric heating body; the elastic necking 53 is used for exposing the first external power line 14 or the second external power line 15.
As shown in fig. 3 and 8, the power connection of the electric heating element 4 includes an external power line i 14 at two ends of the electric heating element
And an external power line II 15; the external power line I14 penetrates through the through hole of the fixed tube I41 and then extends outwards, and high-temperature insulating materials 16 are filled between the external power line I14 and the tube wall of the fixed tube I41; the second external power line 15 penetrates through the through hole of the second fixed tube 42 and then extends outwards, and high-temperature insulating materials 16 are filled between the second external power line 15 and the tube wall of the second fixed tube 42.
The first external power line 14 and the second external power line 15 are both high-temperature-resistant wires, one section of each high-temperature-resistant wire in the air pipe can be a bare wire, and the other section of each high-temperature-resistant wire outside the air pipe, including one section of each high-temperature-resistant wire still in the first fixed pipe 41 or the second fixed pipe 42, is a high-temperature rubber-coated wire;
example two
As shown in fig. 9 to 11, an electric hot air pipe of a rail flaw detection device is different from the first embodiment in that: the electric hot air pipe also comprises a heat insulation plate 6; the heat insulation plate 6 is provided with a first partition plate hole 61 and a second partition plate hole 62 which can be respectively sleeved on the first fixing pipe 41 and the second fixing pipe 42 of the electric heating body 4; the heat insulation board 6 is arranged between the base positioning sheets 43 on the first fixing pipe 41 and the second fixing pipe 42 of the electric heating body 4 in the air pipe 1 and the fixed table ends 10 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8, and the edges of the two sides of the heat insulation board are contacted with the inner wall of the air pipe 1 to divide the air pipe 1 into a hot air channel 17 and a cold air channel 18; the fixed platform end 10 of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 is positioned in the cold air duct 18; the air pressed into the air pipe 1 by the fan is divided into two air flows at the inlet end of the air pipe 1, one air flow enters the hot air duct 17 and is used for receiving and taking away heat emitted by the electric heating body, the other air flow enters the cold air duct 18, and the electric heating body 4 is located in the hot air duct 17 and is used for cooling the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8.
One surface of the heat insulation plate 6 on the cold air duct 18 is an arc concave surface or a trapezoid concave surface; this can enlarge the space of the hot air duct 17 as much as possible.
And the fixed platform ends of the first ceramic screw sleeve and the second ceramic screw sleeve are provided with radiating fins. Arranged so as to fix the platform end
10 obtaining better heat dissipation effect; after the heat insulation board 6 is used for establishing the cold air duct 18, the fixed platform end 10 is also provided with a radiating fin 19 which is more beneficial to heat dissipation. Through the arrangement, the temperature of the first ceramic screw sleeve 7 and the temperature of the second ceramic screw sleeve 8 in the cold air duct 18 are remarkably reduced, and the electric leakage caused by high-temperature ablation of the first ceramic screw sleeve 7 and the second ceramic screw sleeve 8 can be completely avoided.
The above embodiments are only for the purpose of more clearly describing the invention and should not be considered as limiting the scope of protection covered by the invention, any modification of the equivalent should be considered as falling within the scope of protection covered by the invention.
Claims (10)
1. The utility model provides an electric hot-blast main of rail flaw detection equipment which characterized in that: the electric heating air pipe comprises an air pipe (1), an electric heating body (4) and an insulating fixing device; the electric heating body (4) is provided with a power supply wiring connected with the electric heating body; the electric heating body (4) is arranged in the air pipe (1) and has a gap with the pipe wall of the air pipe (1), the insulating fixing device is fixed on the air pipe (1), the electric heating body (4) is fixedly connected with the insulating fixing device, and a power supply wire is led out of the air pipe through the insulating fixing device; the electric heating body (4) is fixed in the air pipe (1) through the insulating fixing device, and simultaneously, the current flowing through the power supply wiring and the electric heating body (4) is insulated from the air pipe (1).
2. The electric hot air pipe of the rail flaw detection equipment according to claim 1, characterized in that: the air pipe (1) is provided with a mounting opening (2); the mounting port (2) is formed in the pipe wall of the air pipe (1) along the axial direction from the port at one end of the air pipe (1); the mounting opening (2) is provided with a mounting sheet (3) which is matched with the mounting opening (2); and a first mounting hole (31) and a second mounting hole (32) are formed in the mounting sheet (3) along the axial direction of the air pipe (1).
3. The electric hot air pipe of the rail flaw detection equipment according to claim 2, characterized in that: the insulating fixing device comprises a first ceramic screw sleeve (7) and a second ceramic screw sleeve (8), wherein the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) are respectively provided with a through hole (9) along an axial core line, and the outer parts of the first ceramic screw sleeve (7) and the second ceramic screw sleeve are divided into a fixing platform end (10) and a threaded end (11); the diameter of the fixed platform end (10) is larger than the diameter of a first mounting hole (31) and the diameter of a second mounting hole (32) of the mounting sheet (3); the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) are respectively installed on a first installation hole (31) and a second installation hole (32) of the installation sheet (3), so that the fixed table ends (10) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) are both located in the air pipe (1), and the threaded ends (11) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) respectively penetrate through the first installation hole (31) and the second installation hole (32) of the installation sheet (3) and are located outside the air pipe (1).
4. The electric hot air pipe of the rail flaw detection equipment according to claim 3, wherein: the electric heating body (4) is a columnar spiral body, and a first fixing pipe (41) and a second fixing pipe (42) are arranged at two ends of the electric heating body (4); the first fixed pipe (41) and the second fixed pipe (42) are straight pipes with axial through holes, and both extend out in the radial direction of the spiral of the electric heating body (4) and are parallel to each other; base positioning pieces (43) are arranged at one ends, close to the electric heating body (4), of the first fixing pipe (41) and the second fixing pipe (42), and port positioning pieces (44) are arranged at ports of the first fixing pipe (41) and the second fixing pipe (42).
5. The electric hot air pipe of the rail flaw detection equipment according to claim 4, wherein: the ceramic screw sleeve I (7) is sleeved on the fixing pipe I (41) between the base positioning piece (43) and the port positioning piece (44) of the fixing pipe I (41); the second ceramic screw sleeve (8) is sleeved on the second fixing tube (42) between the base positioning piece (43) and the port positioning piece (44) of the second fixing tube (42).
6. The electric hot air pipe of the rail flaw detection equipment according to claim 5, wherein: the insulation fixing device also comprises an integral fixing nut (12) and an insulation fixing nut (13); the insulating fixing nut (13) is sleeved at one end, close to the port, of the threaded end (11) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) and is used for screwing in and abutting against port positioning pieces (44) of the first electric heating body fixing pipe (41) and the second electric heating body fixing pipe (42) respectively;
the whole fixing nut (12) is sleeved at one end, close to the mounting piece (3), of the air pipe (1), of the threaded end (11) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) and used for fixedly connecting the electric heating body together with the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) to the mounting piece.
7. The electric hot air pipe of the rail flaw detection equipment according to claim 6, wherein: the insulation fixing device also comprises an insulation cushion (5) used for wrapping the port positioning sheet (44); the insulating pad bag (5) is provided with an elastic bag bottom (51), an elastic bag body (52) and an elastic necking part (53) at the upper part of the elastic bag body (52); the elastic bag bottom (51) is provided with a hole which can be sleeved on the first electric heating body fixing pipe (41) or the second electric heating body fixing pipe (42).
8. The electric hot air pipe of the rail flaw detection equipment according to claim 4, wherein: the electric heating body (4)
The power supply wiring comprises a first external power supply line (14) and a second external power supply line (15) at two ends of the electric heating body (4); the external power line I (14) penetrates through the through hole of the fixed tube I (41) and then extends outwards, and high-temperature insulating materials (16) are filled between the external power line I (14) and the tube wall of the fixed tube I (41); and the second external power supply wire (15) penetrates through the through hole of the second fixed pipe (42) and then extends outwards, and high-temperature insulating materials (16) are filled between the second external power supply wire (15) and the pipe wall of the second fixed pipe (42).
9. The electric hot air pipe of the rail flaw detection equipment according to claim 4, wherein: the electric hot air pipe also comprises a heat insulation plate (6); the heat insulation plate (6) is provided with a first partition plate hole (61) and a second partition plate hole (62) which can be respectively sleeved on a first fixing pipe (41) and a second fixing pipe (42) of the electric heating body (4); the heat insulating board (6) is arranged between a first fixed pipe (41) and a second fixed pipe (42) of the electric heating body (4) in the air pipe (1) and a base positioning piece (43) on the first fixed pipe (41) and the second fixed pipe (42) of the ceramic screw sleeve (7) and the second ceramic screw sleeve (8), the edges on the two sides of the heat insulating board are in contact with the inner wall of the air pipe (1), the air pipe (1) is separated into a hot air duct (17) and a cold air duct (18), the electric heating body (4) is arranged in the hot air duct (17), and the second fixed pipe (10) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) is arranged in the cold air duct (18).
10. The electric hot air pipe of the rail flaw detection equipment according to claim 9, characterized in that: the fixing table ends (10) of the first ceramic screw sleeve (7) and the second ceramic screw sleeve (8) are provided with radiating fins (19).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921430610.XU CN210680741U (en) | 2019-08-30 | 2019-08-30 | Electric heating air pipe of rail flaw detection equipment |
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| CN201921430610.XU CN210680741U (en) | 2019-08-30 | 2019-08-30 | Electric heating air pipe of rail flaw detection equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562291A (en) * | 2019-08-30 | 2019-12-13 | 湖南东洲电气科技有限公司 | electric hot air pipe of rail flaw detection equipment and method for improving heat efficiency and avoiding electric leakage |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562291A (en) * | 2019-08-30 | 2019-12-13 | 湖南东洲电气科技有限公司 | electric hot air pipe of rail flaw detection equipment and method for improving heat efficiency and avoiding electric leakage |
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