CN110822425A - A protection device that can improve the service life of radiant tube - Google Patents

Abstract

The invention discloses a protection device capable of prolonging the service life of a radiant tube, which comprises: the radiant tube with a tube body with a temperature difference penetrates through a steel structure, and a port of the radiant tube is positioned above the steel structure; the upper panel is fixedly arranged on the outer wall surface of the port of the radiant tube; the lower panel is fixedly arranged on the steel structure and is positioned below the upper panel; the telescopic piece is arranged at the port of the radiant tube and positioned between the upper panel and the lower panel and is used for compensating the deformation of the radiant tube in the axial direction caused by the principle of expansion with heat and contraction with cold; wherein, the top of extensible member with the top panel is connected, the bottom with the lower panel is connected. The protection device can effectively prolong the service life of the radiant tube and has the advantages of simple structure and convenience in use.

Description

A protection device that can improve the service life of radiant tube

technical field

The invention relates to the technical field of metallurgical equipment, in particular to a protection device capable of improving the service life of a radiant tube.

Background technique

The radiant tube is a heating device that uses the heat generated by the combustion of the combustion gas in the tube to transfer the heat to the object to be heated through the surface of the heated tube in the form of thermal radiation as the main form. In order to ensure the temperature uniformity and radiation range in the process of heat transfer in the radiant tube, the radiant tube adopts U-shaped and W-shaped structures. Usually one end of the radiant tube is equipped with a nozzle. When the nozzle is in operation, the temperature difference between the combustion end and the non-combustion end of the radiant tube is large, and the radiant tube will have a problem of uneven temperature along the flow direction of the combustion gas. This problem becomes more pronounced as the length of the tube increases. The tube body on the combustion side with a higher temperature will have a certain amount of deformation due to the principle of thermal expansion and contraction, while the tube body on the non-combustion side will be easily damaged due to the long-term influence of the deformation amount. Therefore, it is necessary to develop a radiant tube that can improve Lifetime protection device.

SUMMARY OF THE INVENTION

Aiming at the deficiencies in the above technologies, the present invention provides a protection device with a simple structure that can improve the service life of the radiant tube.

The technical solution adopted by the present invention to solve the technical problem is: a protection device that can improve the service life of a radiant tube, comprising: a radiant tube with a temperature difference in the tube body, the radiant tube penetrates the steel structure and the port of the radiant tube above the steel structure; an upper panel fixedly arranged on the outer wall of the radiant tube port; a lower panel fixedly arranged on the steel structure and located below the upper panel; The port of the radiant tube is located between the upper panel and the lower panel for compensating the deformation of the radiant tube in the axial direction due to the principle of thermal expansion and contraction; wherein, the top of the telescopic element It is connected with the upper panel, and the bottom is connected with the lower panel.

Preferably, the radiant tube has a first port and a second port, wherein the first port is provided with a burner, and the second port is provided with a heat exchanger.

Preferably, the radiant tube is in a "U" shape, the tube body on the side where the burner is installed is defined as tube body a, and the tube body on the side where the heat exchanger is installed is defined as the radiant tube is a pipe body b, wherein the temperature of the pipe body a is higher than the temperature of the pipe body b, and the protection device is arranged at the second port.

Preferably, the burner is detachably arranged on the first port through a first flange; the heat exchanger is detachably arranged on the second port through a second flange.

Preferably, the amount of deformation that can be generated by the telescopic element is greater than the amount of deformation in the axial direction of the radiant tube due to the principle of thermal expansion and cold contraction.

Preferably, the radiant tube is arranged on the thermal insulation layer of the wall through the steel structure.

Preferably, the upper panel is disposed on the outer wall surface of the radiant tube port by welding, wherein the upper panel is flush with the port of the radiant tube.

Preferably, the lower panel is disposed on the steel structure by welding.

Preferably, the outer ring of the telescopic element is covered with a protective layer.

Preferably, the expansion joint is a temperature-resistant and sealed expansion joint.

Compared with the prior art, the present invention has the beneficial effects that the protection device provided by the present invention can improve the service life of the radiant tube, which can compensate the deformation amount of the radiant tube in the axial direction due to the principle of thermal expansion and cold contraction, The utility model can effectively prolong the service life of the radiant tube, and has the advantages of simple structure and convenient use.

Description of drawings

1 is a schematic diagram of the positional relationship between the protection device for improving the service life of the radiant tube according to the present invention and the radiant tube;

Fig. 2 is the enlarged structural representation of C area in Fig. 1;

3 is a schematic diagram of the installation relationship between the burner and the heat exchanger of the present invention.

In the figure: 10, wall insulation layer; 20, radiant tube; 21, first port; 22, second port; 30, burner; 31, first flange; 40, heat exchanger; 41, second Flange; 50, upper panel; 60, lower panel; 70, telescopic parts; 80, steel structure; 90, protective layer.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

As shown in FIG. 1 to FIG. 3 , the present invention provides a protection device that can improve the service life of the radiant tube, the protection device is arranged at the low temperature port of the radiant tube 20, and includes: the radiant tube 20 with a temperature difference in the tube body, The radiant tube 20 runs through the steel structure 80 and the port of the radiant tube 20 is located above the steel structure 80; the upper panel 50 is fixedly arranged on the outer wall of the port of the radiant tube 20; the lower panel is fixedly arranged on the steel structure 80 and located below the upper panel 50 60; and a telescopic member 70 sleeved at the port of the radiant tube 20 and located between the upper panel 50 and the lower panel 60 for compensating the deformation of the radiant tube 20 in the axial direction due to the principle of thermal expansion and cold contraction; The top of the telescopic element 70 is connected to the upper panel 50 and the bottom is connected to the lower panel 60 . In this solution, the radiant tube 20 is in a "U" shape, the radiant tube 20 has a first port 21 and a second port 22 , the first port 21 is provided with a burner 30 , and the second port 22 is provided with a heat exchanger 40 , the first port 21 is a high temperature port, and the second port 22 is a low temperature port; the tube body on the side where the burner 30 is installed on the radiant tube 20 is defined as tube body a, and the tube body on the side where the heat exchanger 40 is installed on the radiant tube 20 is defined as Tube body b, wherein the temperature of the tube body a on the side where the burner 30 is installed is higher than the temperature of the tube body b, thereby forming a temperature difference, the protection device is arranged at the second port 22, specifically, the first port of the radiant tube 20 The port 21 and the second port 22 extend to the top of the steel structure 80, and the main part of the radiant tube 20 is located below the steel structure 80, that is, the port and the main part of the radiant tube 20 are located on opposite sides of the steel structure 80, respectively. The upper and lower sides can also be the left and right sides or the front and rear sides, which can be selected according to the use situation; the steel structure 80 is formed with through holes for the first port 21 and the second port 22 to pass through, when the burner 30 When working, the temperature of the tube body a is higher than the temperature of the tube body b. There is a temperature difference between the tube body a and the tube body b. The tube body a will have a certain amount of deformation in its axial direction due to the heating. It will produce a pulling force along the axial direction of the tube body b. If there is no protective device, the tube body b cannot compensate for the deformation of the tube body a. The long-term influence of the deformation of the tube body b will shorten the radiation The service life of the tube 20; in this solution, by setting the protection device at the second port 22 with a lower temperature, the axial deformation amount generated by the tube body a can be compensated, and the service life of the radiant tube 20 can be effectively prolonged. When the protection device compensates the axial deformation of the pipe body a, the pipe body b has an axial displacement relative to the steel structure 80 .

As an example of this solution, as shown in FIGS. 1 to 3 , the burner 30 is detachably arranged on the first port 21 through the first flange 31 ; the heat exchanger 40 is detachably arranged on the first port 21 through the second flange 41 . On the second port 22 ; specifically, the heat exchanger 40 is detachably connected to the upper panel 50 through the second flange 41 .

As an embodiment of this solution, the amount of deformation that can be generated by the telescopic element 70 is greater than the amount of deformation in the axial direction of the radiant tube 20 due to the principle of thermal expansion and cold contraction.

As an example of this solution, as shown in FIG. 1 , the radiant tube 20 is disposed on the wall insulation layer 10 through the steel structure 80 .

As an embodiment of this solution, as shown in FIG. 2 , the upper panel 50 is disposed on the outer wall of the port of the radiant tube 20 by welding, wherein the upper panel 50 is flush with the port of the radiant tube 20 .

As an embodiment of this solution, as shown in FIG. 2 , the lower panel 60 is disposed on the steel structure 80 by welding.

As an embodiment of this solution, as shown in FIG. 2 and FIG. 3 , the outer ring of the telescopic element 70 is covered with a protective layer 90 .

As an embodiment of this solution, the expansion joint 70 is a temperature-resistant and airtight expansion joint.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the application listed in the description and the embodiment, it can be applied to various fields suitable for the present invention, and those skilled in the art can easily Additional modifications are implemented, therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (10)

1. A protection device that can improve the service life of a radiant tube is characterized in that, comprising: a radiant tube (20) with a temperature difference in the tube body, the radiant tube (20) penetrates the steel structure (80) and the port of the radiant tube (20) is located above the steel structure (80); an upper panel (50) fixedly arranged on the outer wall of the port of the radiant tube (20); a lower panel (60) fixedly arranged on the steel structure (80) and located below the upper panel (50); and A telescopic piece (70) is provided at the port of the radiant tube (20) and between the upper panel (50) and the lower panel (60) for compensating for the heat of the radiant tube (20) The amount of deformation in the axial direction caused by the principle of expansion and contraction; Wherein, the top of the telescopic element (70) is connected with the upper panel (50), and the bottom is connected with the lower panel (60). 2. The protection device for improving the service life of a radiant tube according to claim 1, characterized in that, the radiant tube (20) has a first port (21) and a second port (22), wherein the first port (21) A burner (30) is provided on one port (21), and a heat exchanger (40) is provided on the second port (22). 3. The protection device capable of improving the service life of a radiant tube according to claim 2, characterized in that, the radiant tube (20) is in a "U" shape, and the radiant tube (20) is installed with the burner The tube body on the side of (30) is defined as tube body a, and the tube body on the side where the radiant tube (20) is installed with the heat exchanger (40) is defined as tube body b, wherein the temperature of the tube body a is high At the temperature of the pipe body b, the protection device is arranged at the second port (22). The protection device for improving the service life of the radiant tube according to claim 2, characterized in that, the burner (30) is detachably arranged on the first port (21) through the first flange (31) The heat exchanger (40) is detachably arranged on the second port (22) through the second flange (41). 5. The protection device capable of improving the service life of a radiant tube according to claim 1, characterized in that the amount of deformation that can be generated by the telescopic element (70) is greater than that of the radiant tube (20) due to the principle of thermal expansion and contraction The resulting deformation in the axial direction. 6. The protection device capable of improving the service life of a radiant tube according to claim 1, characterized in that, the radiant tube (20) is arranged on the wall insulation layer (10) through the steel structure (80). 7. The protection device capable of improving the service life of a radiant tube according to claim 1, characterized in that, the upper panel (50) is disposed on the outer wall surface of the port of the radiant tube (20) by welding, wherein, The upper panel (50) is flush with the port of the radiant tube (20). 8. The protection device capable of improving the service life of a radiant tube according to claim 1, characterized in that, the lower panel (60) is disposed on the steel structure (80) by welding. 9. The protection device capable of improving the service life of a radiant tube according to claim 1, characterized in that, a protective layer (90) is covered on the outer ring of the telescopic element (70). 10. The protection device capable of improving the service life of the radiant tube according to claim 1, characterized in that, the expansion joint (70) is a temperature-resistant and sealed expansion joint.

Images