Furnace temperature detection device for rotary cupola

Abstract

The invention belongs to the field of temperature detection devices, and particularly relates to a rotary cupola temperature detection device which comprises at least one infrared probe temperature measurement assembly. The infrared probe temperature measurement assembly comprises an outer shell, a core cylinder set and an infrared temperature measurement probe. One end of the outer shell is an open end, and the other end is a closed end. The detection end of the infrared temperature measurement probe is close to the closed end, and the closed end is provided with a window part. The shaft cavity of the core cylinder set can be communicated with the open end and the closed end of the outer shell. And the outer wall of the core cylinder group is hermetically matched with the middle of the inner wall of the outer shell. A hot air flow channel is formed on the inner half section cylinder wall of the core cylinder group; and an exhaust pipe is arranged on the outer shell and is communicated with the hot air flow channel. And after the outer shell is fixed on the chimney and / or the burner hole cover, infrared rays of the infrared temperature measurement probe are upwards inclined and can be emitted to the furnace lining at the top of the furnace chamber. The purpose of continuously measuring the temperature of the inner surface of the furnace lining is achieved, and the infrared temperature measuring probe can be continuously cooled in the operation process.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature detection of a recycling iron-converting furnace, and in particular relates to a temperature detection device of a recycling iron-converting furnace. Background Art

[0002] The reverberator is an energy-saving melting furnace developed on the basis of the reverberator. The fuel used for smelting metals is propane gas and natural gas, and the combustion aid is mostly pure oxygen. In addition to smelting cast iron, the reverberator can also be used to smelt non-ferrous metals such as copper, aluminum, tin, lead, and cast steel. The main parts of the reverberator mainly include the furnace body, the drive assembly for driving the furnace body to rotate and tilt, the movable or rotating fuel burner, and the movable chimney. See Figure 1 As shown, the furnace body of the rotary iron-making furnace 10 can generally be divided into three parts, namely, the burner hole end, the middle section of the furnace body and the tail gas hole end. A refractory furnace lining 13 is built in the furnace chamber of the middle section, and the furnace body is provided with process holes such as the burner hole 11, the tail gas hole 12, and the iron outlet. The burner 30 is installed on the burner hole cover 20. Due to the influence of natural convection effect, the temperature of the top side of almost all industrial heating furnaces and kilns, which is far away from the center of the earth, is always higher than that of the bottom side. The rotary motion of the furnace body can drive the furnace lining layer to rotate, and constantly change the upper and lower positions of the furnace lining to promote the temperature of all the furnace linings in the furnace chamber to basically converge. After the temperature of the furnace lining is basically the same, the damage of the furnace lining caused by local overheating of the furnace lining is prevented, and the service life of the furnace lining can be extended. In addition, the furnace lining rotating with the furnace body plays a particularly important role in the overheating of the molten metal 100 at the bottom of the furnace (the temperature rise of the liquid metal during heating is called overheating). The part of the furnace lining 13 that rotates to the furnace top absorbs a large amount of heat energy released by the fuel and becomes hotter. When it rotates to the furnace bottom, it transfers the stored heat energy to the molten metal through heat exchange with the molten metal at the furnace bottom, causing the temperature of the molten metal to continue to rise, and the slag layer 101 always floats on the molten metal 100 at the furnace bottom. Therefore, after the furnace body makes a rotating motion, it can not only save fuel, but also extend the service life of the furnace lining.

[0003] During the period of heating and smelting metal in the revolving iron-converting furnace, the furnace body is in a rotating state, the burner hole cover 20 covers the burner hole 11 on the furnace body, and the chimney 40 covers the tail gas hole 12 on the furnace body. Due to the structural limitations of the revolving iron-converting furnace, it is impossible to use a temperature measuring instrument to detect the temperature in the furnace during its heating period, that is, it is impossible to detect the temperature of the surface of the furnace lining 13 in the furnace and / or the temperature of the molten metal 100 at the bottom of the furnace. At present, when detecting the temperature in the furnace of the revolving iron-converting furnace, it is often necessary to wait until the fuel burner stops heating, or move the burner hole cover 20 away from the burner hole 11, or move the chimney 40 away from the tail gas hole 12, and then pass through the burner hole 11 or the tail gas hole 12 position, and use a temperature detection instrument to detect the surface temperature of the furnace lining (at the top surface) in the furnace. In the aforementioned temperature measurement operation, in order to ensure that the outlet temperature of the molten metal is accurately close to the preset requirements, it is necessary to use a temperature measuring device to measure the temperature of the furnace lining 13 in time after the burner stops heating and the burner hole cover 20 or the chimney 40 is removed. The progress of the entire operation process is very tight. Generally, it is necessary to measure continuously and repeatedly for at least three times until the relative difference between the three consecutive measurement values ​​is within the required range. Therefore, the entire temperature measurement operation process is very tight. If there is a slight mistake, it needs to be restarted, which seriously restricts the efficiency of the temperature measurement operation. In the prior art, there are still a few implementation schemes that detect the temperature of the furnace lining by installing an infrared temperature probe on the furnace body. Although it overcomes the complicated problems of the commonly used temperature measurement method, there are still some shortcomings: (1) The position of the infrared temperature probe relative to the furnace body is fixed and unchanged, and the measured furnace lining temperature has a prominent position limitation. In order to overcome this limitation, it is necessary to arrange more infrared temperature probes around the furnace body, which not only increases the cost, but also adversely affects the strength and thermal insulation performance of the furnace body. The temperature drop point is prone to appear in the position range where the infrared probe is arranged; (2) The infrared temperature probe is directly installed on the furnace body, and its detection end is very close to the inner layer of the furnace lining. It is easy to be damaged and ineffective after being exposed to high temperature for a long time, resulting in a sharp increase in maintenance costs. Summary of the invention

[0004] The present invention provides a furnace temperature detection device for a recycling iron-making furnace. By adopting the technical means of arranging an infrared temperature measuring probe on the peripheral structure of the furnace body, the device achieves the purpose of continuous temperature measurement of the inner surface of the furnace lining and can continuously cool the infrared temperature measuring probe during operation, so as to enable the infrared temperature measuring probe to operate in a low-temperature environment, effectively suppress the damage of the infrared temperature measuring probe, and help reduce the use and maintenance costs.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a temperature detection device for a recycling iron-making furnace, comprising a recycling iron-making furnace, a burner hole cover and a chimney corresponding to the burner hole and the tail gas hole of the recycling iron-making furnace, and at least one infrared probe temperature measurement assembly. The infrared probe temperature measurement assembly comprises an outer shell, a core barrel group fixedly arranged in the outer shell, and an infrared temperature measurement probe fixedly arranged on the core barrel group.

[0006] One end of the outer shell is an open end, and the other end is a closed end. The detection end of the infrared temperature measuring probe is close to the closed end, and a window for the infrared rays of the infrared temperature measuring probe to emit is arranged on the closed end.

[0007] The axial cavity of the core barrel group is connected to the open end and the closed end of the outer shell to form a cold air flow channel. Cold air is delivered from the open end of the outer shell, and reaches the closed end of the outer shell after passing through the axial cavity of the core barrel group. The middle part of the outer wall of the core barrel group is sealed and matched with the inner wall of the outer shell, and the axial cavity of the outer shell is divided into two unconnected sections to prevent the cold air delivered to the closed end from flowing over a long distance toward the open end of the outer shell through the annular gap between the core barrel group and the outer shell, which adversely affects the cooling effect. A hot air flow channel is formed on the inner half of the barrel wall of the core barrel group, and the air inlet of the hot air flow channel is formed at the inner end of the core barrel group, that is, the air inlet is formed at one end of the core barrel group extending to the closed end. An exhaust pipe that passes into the outer shell is provided on the outer shell and is connected to the closed end of the hot air flow channel; The outer shell is fixed at the corner of the chimney and / or fixed on the burner hole cover, so that the infrared rays emitted by the infrared temperature measuring probe are inclined upward and can reach the furnace lining wall at the top of the furnace chamber of the return iron converter.

[0008] Optionally, the outer shell includes a cylindrical outer shell body, and end caps and end barrels fixedly connected to both ends of the outer shell body. The window portion is formed on the bottom wall of the end cap. A radial flange 1 is formed in the axial cavity of the outer shell body and on one side close to the end cap. The core barrel assembly and the radial flange 1 are matched and connected together with a threaded structure, and the axial cavity is blocked into two unconnected sections.

[0009] Optionally, the core barrel group includes core barrel one, end ring, core barrel two and core barrel three arranged sequentially in the axial direction.

[0010] The outer wall of the core barrel 1 is sealed and matched with the inner wall of the outer shell, and the axial cavity of the outer shell is divided into two unconnected sections. A plurality of connecting holes are arranged alternately around the circumference on the wall of the core barrel 1, and one end of the core barrel 1 is close to the window portion, and the other end is fixedly connected to the end ring.

[0011] An annular groove is formed on the end ring, which can be connected with the same side ends of each connecting hole at the same time, and the exhaust pipe is connected with the annular groove. In this way, the connecting hole and the annular groove form a hot air flow channel connected with the exhaust pipe.

[0012] Core barrel 2 is matched with core barrel 1 through a threaded structure, and one end of core barrel 2 is inserted into core barrel 1 and matched with the infrared temperature measuring probe, so that the infrared temperature measuring probe is relatively fixed in the barrel cavity of core barrel 1, and the detection end of the infrared temperature measuring probe can be extended out of core barrel 1, corresponding to the window of the outer shell. The other end of core barrel 2 is fixedly connected with one end of core barrel 3, and the other end of core barrel 3 is fixed on the outer shell.

[0013] Optionally, a pair of arm plates arranged opposite to each other in the radial direction are formed on one end of the core barrel 2 extending into the core barrel 1. The length extension direction of the arm plates is consistent with the axial direction of the core barrel 2. The probe fixing sleeve of the infrared temperature measuring probe is correspondingly arranged between the two arm plates, and is matched with the arm plates through the pivot portion arranged on the probe fixing sleeve, so that the infrared temperature measuring probe can rotate relative to the arm plates in the vertical plane, so that the infrared temperature measuring probe can rotate relative to the horizontal plane to different inclination amplitudes.

[0014] A connecting rod is formed on the probe fixing sleeve, which passes through the barrel cavity of the core barrel 2 and extends into the core barrel 3, and a gear part is formed at the end of the connecting rod. A rack unit is provided on the core barrel 3. The rack body of the rack unit is arranged in the vertical direction and is provided in the core barrel 3, and can mesh with the gear part.

[0015] The rods arranged at the upper and lower ends of the rack body are both extended to the outside of the core tube three and matched with the transmission part, so that the height position of the rack body in the vertical direction can be adjusted, so that the inclination amplitude of the infrared temperature measuring probe relative to the horizontal direction can be adjusted and controlled, and fixed at different positions.

[0016] Optionally, the rod portion includes a screw portion 1 and a screw portion 2 fixedly arranged at the upper end and the lower end of the rack body. The transmission portion on the screw portion 1 includes a spring and a nut 1. The two ends of the spring are in contact with the outer wall surface of the nut 1 and the core barrel 3 respectively. The transmission portion on the screw portion 2 is arranged outside the outer shell and includes a nut 2. It can also be understood that: the transmission portion on the screw portion 1 includes an external thread segment on the screw portion 1, a nut 1 matching the external thread segment, and a spring; the transmission portion on the screw portion 2 includes an external thread segment on the screw portion 2 and a nut 2 configured on the external thread segment.

[0017] Optionally, a plurality of fin plates are arranged on the inner wall of the core barrel 1 and are alternately distributed around the circumference. The length direction of the fin plates is consistent with the axial direction of the core barrel 1, and the width direction is along the radial direction of the core barrel 1.

[0018] Optionally, a second conical surface is formed at one end of the core barrel near the window and at the end of the outer peripheral surface. The small diameter end of the second conical surface is a free end. One end port of the communication hole extends to the root of the second conical surface.

[0019] Optionally, the infrared temperature measuring probe is pivotally matched with one end of the core barrel assembly close to the closed end of the outer shell, so that the infrared temperature measuring probe can rotate in a vertical plane. A gear part is formed on one end side of the infrared temperature measuring probe.

[0020] A rack unit is provided on the core barrel assembly. The rack body of the rack unit is arranged in the vertical direction and is provided in the barrel cavity of the core barrel assembly near the open end of the outer shell. The rack body can mesh with the gear part. The rods provided at the upper and lower ends of the rack body are both extended to the outside of the core barrel assembly and matched with the transmission part, and the height position of the rack body in the vertical direction can be adjusted, thereby adjusting the tilt amplitude of the infrared temperature measuring probe relative to the horizontal direction.

[0021] Optionally, the rod portion includes a screw portion 1 and a screw portion 2 fixedly arranged at the upper end and the lower end of the rack body. The transmission portion on the screw portion 1 includes a spring and a nut 1, so that the two ends of the spring are respectively in contact with the lower end surface of the nut 1 and the outer wall surface of the core barrel assembly. The transmission portion on the screw portion 2 is arranged outside the outer shell and includes a nut 2.

[0022] Optionally, a heat insulating layer is provided on the outer wall of the outer shell at least on one side close to the closed end of the outer shell. When the outer shell is fixed on the chimney or the burner hole cover, the axial extension length of the heat insulating layer can cover the entire contact surface between the outer shell and the chimney or the burner hole cover.

[0023] The beneficial effects of the present invention are as follows: the present invention realizes the purpose of real-time temperature measurement of the inner surface of the top of the furnace lining by means of setting an infrared temperature measuring probe on the peripheral structure of the furnace body, such as on the chimney, on the burner hole cover, etc., and can continuously cool down the peripheral space of the infrared temperature measuring probe during operation, so as to prompt the infrared temperature measuring probe to operate in a relatively low temperature environment. Compared with the existing method of fixing the infrared temperature measuring probe on the furnace body to measure the temperature of the furnace lining, it can not only reduce the total use of infrared temperature measuring probes, but also effectively inhibit the infrared temperature measuring probes from being easily damaged due to long-term operation in a high-temperature environment, which helps to reduce the installation, use and maintenance costs of the temperature measuring mechanism. In addition, by driving the infrared temperature measuring probe to rotate in the vertical plane, the purpose of real-time temperature measurement of a large range of the top of the furnace lining can be achieved, which helps to more accurately control the temperature of the molten metal out of the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention in use state.

[0025] Figure 2 This is a schematic diagram of the infrared probe temperature measurement assembly configured on the chimney.

[0026] Figure 3 This is a schematic diagram of the split structure of the infrared probe temperature measurement assembly (the end tube is not shown).

[0027] Figure 4 It is a structural schematic diagram of an infrared temperature measuring probe pivotally matched with core barrel 2 and configured on core barrel 1.

[0028] Figure 5 for Figure 4 The right side structural schematic diagram of the core barrel 1 is shown.

[0029] Figure 6 This is a schematic diagram of the main cross-sectional structure of the core tube 2.

[0030] Figure 7 It is a schematic diagram of the right view structure of core tube 2.

[0031] Figure 8 It is a schematic diagram of the top view structure of the core tube 2.

[0032] In the figure: 100 molten metal at the bottom of the furnace, 101 slag layer; 10 return iron conversion furnace, 11 burner hole, 12 tail gas hole, 13 furnace lining; 20 burner hole cover; 30 burner, 31 burner translation assembly; 40 chimney; 50 infrared probe temperature measurement assembly; 51 shell body, 511 axial cavity, 512 radial flange one, 513 threaded countersunk hole, 514 flange end one, 5141 countersunk hole, 515 insulation layer, 52 end cap, 521 axial flange one, 522 window part, 53 end tube, 531 flange end two, 532 sealing gasket, 54 core tube one, 541 annular countersunk hole, 542 threaded through hole, 543 first cone surface, 544 second cone surface, 545 connecting hole, 546 wing Plate, 55 end ring, 551 axial flange two, 552 annular groove, 553 axial flange three, 554 threaded surface boss, 56 exhaust pipe, 57 core barrel two, 571 arm plate, 572 boss, 58 core barrel three, 581 first annular flange, 582 second annular flange, 583 radial flange two, 584 first through hole, 585 second through hole, 59 rack unit, 591 rack body, 592 screw part one, 593 spring, 594 nut one, 595 screw part two, 596 nut two; 60 infrared temperature measuring probe, 61 probe fixing sleeve, 611 pivot part, 62 gear part; 70 target space. DETAILED DESCRIPTION

[0033] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0034] like Figures 1 to 8 The temperature detection device of a recycling iron-making furnace shown in the figure comprises a recycling iron-making furnace 10, a burner hole cover 20 and a chimney 40 corresponding to the burner hole 11 and the exhaust hole 12 of the recycling iron-making furnace 10, and two infrared probe temperature measurement assemblies 50. The two infrared probe temperature measurement assemblies 50 are respectively fixed at the corner positions of the chimney 40 and on the cover plate of the burner hole cover 20. The infrared probe temperature measurement assemblies 50 each comprise an outer shell, a core barrel group fixedly arranged in the outer shell, and an infrared temperature measurement probe 60 fixedly arranged on the core barrel group. The axis centerline extension directions of the outer shell and the core barrel group are both in the left-right direction, and after assembly, the axis centerline of the outer shell is close to or coincides with the axis centerline of the core barrel group. The inner diameter of the outer shell is generally larger than the outer diameter of the core barrel group, and an annular gap area is formed at most positions between the relative circumferences of the two to play a heat insulation role.

[0035] The left end of the outer shell is an open end, and the right end is a closed end. The open end is connected to an external cold air source, and the closed end is embedded in the wall of the chimney 40 or the cover plate of the burner hole cover 20. The detection end of the infrared temperature probe 60 is close to the closed end side of the outer shell, and a window 522 is provided on the end plate of the closed end for the infrared rays emitted by the infrared temperature probe 60 to pass through. The window 522 is made of a high temperature resistant transparent material.

[0036] The axial cavity of the core barrel group can connect the open end and the closed end of the outer shell to form a cold air flow channel. The middle part of the outer wall of the core barrel group is sealed and matched with the inner wall of the outer shell, and the axial cavity 511 of the outer shell is divided into two non-interconnected left and right sections to prevent the cold air delivered to the closed end from flowing too far toward the open end of the outer shell through the annular gap area between the core barrel group and the outer shell, which adversely affects the cooling effect. Preferably, the position where the core barrel group is sealed and matched with the outer shell divides the axial cavity 511 of the outer shell into two non-interconnected left and right sections, and the axial length of the left section is significantly greater than the axial length of the right section.

[0037] A hot air flow channel is formed on the inner half wall of the core barrel group, and an air inlet of the hot air flow channel is formed at the inner end of the core barrel group. Figures 1 to 5 As shown, the air inlet of the hot air flow channel is the right end of the communication hole 545. An exhaust pipe 56 is provided on the outer shell and penetrates into the outer shell, and the inner end of the exhaust pipe 56 is connected to the closed end of the hot air flow channel, and the outer end of the exhaust pipe 56 extends to the outside of the outer shell.

[0038] The two outer shells are respectively fixed at the corners of the chimney 40 and fixed on the burner hole cover 20, and the infrared rays emitted by the two infrared temperature measuring probes 60 are inclined upward and can reach the wall surface of the furnace lining 13 at the top of the furnace chamber of the return iron furnace 10, see Figure 1 Dotted line shown.

[0039] As in the prior art, the burner 30 is fixed on the burner hole cover 20, and the burner hole cover 20 and the burner 30 are fixed together on the burner translation assembly 31, and the burner hole cover 20 is controlled to block the burner hole 11 and move away from the burner hole 11 by the burner translation assembly 31. Similarly, the chimney 40 is also equipped with a moving assembly, and the chimney 40 is controlled to be correspondingly located at the exhaust hole 12 and moved away from the exhaust hole 12 by the moving assembly.

[0040] In the above technical solution, cold air is introduced into the axial cavity of the core barrel group from the left end of the outer shell and flows to the right along the axial cavity of the core barrel group to the right end of the outer shell, that is, the position of the target space 70 in the figure. At the target interval 70, the cold air is mixed with the hot air convection surrounding the infrared temperature probe 60, and the hot air formed after heating enters the hot air flow channel from the air inlet of the hot air flow channel, flows to the left along the hot air flow channel, and is finally discharged to the outside from the exhaust pipe 56. During operation, cold air is continuously introduced into the axial cavity of the core barrel group, the space around the infrared temperature probe 60 is cooled, and the hot air is continuously discharged in time through the hot air flow channel. In the cold air delivery path, with the help of the annular gap area formed between the outer shell and the core barrel group, temperature insulation is effectively achieved, which helps to ensure that the cold air delivered to the target space 70 is in a good low temperature state, and the cooling effect achieved by the target space 70 can be guaranteed. The outer shell and the core barrel assembly can both be made of high temperature resistant heat insulating material / thermal insulation material.

[0041] like Figures 2 to 3 As shown, the outer shell includes a cylindrical outer shell body 51, and end caps 52 and end tubes 53 respectively fixedly connected to the left and right ends of the outer shell body 51. The window portion 522 is formed on the bottom wall of the end cap 52.

[0042] A radial flange 1 512 is formed in the axial cavity 511 of the housing body 51 and on one side close to the end cap 52. The core barrel assembly and the radial flange 1 512 are connected together by a threaded structure, and the axial cavity 511 can be blocked into two unconnected left and right sections at the radial flange 1 512.

[0043] An axial flange 521 is formed on one end surface of the end cap 52 facing the shell body 51, and an external thread is formed on the outer wall of the axial flange 521. Correspondingly, a threaded countersunk hole 513 is formed at one end of the shell body 51 where the shell body 51 and the end cap 52 are connected. The axial flange 521 matches the threaded countersunk hole 513 to fix the end cap 52 on the shell body 51.

[0044] A flange end 2 531 and a flange end 1 514 are formed at the ends where the end tube 53 and the shell body 51 are connected together, and the end tube 53 and the shell body 51 are connected as a whole through the flange ends, and a sealing gasket 532 is provided between the two flange ends.

[0045] On the outer wall of the outer shell, at least on one side close to the closed end of the outer shell, a heat insulating layer 515 is provided. That is, on the outer wall of the outer shell body 51, at least on one side close to the end cap 52, a heat insulating layer 515 is provided. Figure 1 As shown, when the outer shell is fixed on the chimney 40, the axial extension length of the thermal insulation layer 515 can cover the entire contact surface between the outer shell and the chimney 40, thereby achieving a good thermal insulation effect.

[0046] The core barrel assembly includes a core barrel 1 54, an end ring 55, a core barrel 2 57 and a core barrel 3 58. The inner diameter of the core barrel 3 58 is larger than the inner diameter of the core barrel 1 54. The inner diameter of the core barrel 1 54 is larger than the outer diameter of the core barrel 2 57. The barrel cavity of the core barrel 2 57 can be trumpet-shaped.

[0047] The outer wall of the core barrel 54 is sealed and matched with the inner wall of the outer shell, and the axial cavity 511 of the outer shell is divided into two non-connected left and right sections. Specifically, an internal thread is formed on the radial flange 512 formed on the outer shell body 51 of the outer shell, and correspondingly, an external thread is formed on the outer peripheral surface of the core barrel 54. Therefore, the core barrel 54 and the radial flange 512 can be fixedly connected together through the threaded structure, and the axial position of the core barrel 51 in the outer shell body 51, that is, the relative position of the two in the left and right directions, can be adjusted.

[0048] A plurality of communication holes 545 are arranged alternately around the circumferential direction on the wall of the core barrel 1 54. The communication holes 545 can penetrate the end surfaces of both ends of the core barrel 1 54. After assembly, one end of the core barrel 1 54 is close to the window portion 522, extending into the cap cavity of the end cap 52, and close to the inner bottom surface of the end cap 52.

[0049] The other end of the core barrel 1 54 is fixedly connected to the end ring 55. Specifically, an annular countersunk hole 541 is formed on the end surface of the core barrel 1 54 facing the end ring 55, and an axial flange 2 551 is correspondingly formed on the end surface of the end ring 55. The annular countersunk hole 541 and the axial flange 2 551 are matched through a threaded structure, so that the end ring 55 can be fixed to the left end of the core barrel 1 54.

[0050] An annular recessed groove 552 is formed on the end ring 55, which can be simultaneously communicated with the same side ends of each communication hole 545, and the exhaust pipe 56 is connected to the annular recessed groove 552. Specifically, an annular threaded surface boss 551 is formed on the end ring 55. An internal threaded surface segment corresponding to and matching the threaded surface boss 551 is provided at the port of the exhaust pipe 56.

[0051] In order to improve the sealing effect at the butt end of the annular sink groove 552 and the connecting hole 545, hot air is prevented from leaking into the axial center cavity 511 of the outer shell. On the end face of the end ring 55 facing the core barrel 1 54, an annular axial flange 3 553 is formed at the edge. At that time, the same side end ports of each connecting hole 545 are correspondingly distributed between the axial flange 3 553 and the axial flange 2 551. The inner circumferential surface of the axial flange 3 553 is an annular conical surface with the large diameter end facing outward. Correspondingly, a first conical surface 543 corresponding to and matching the axial flange 3 553 is formed at the end of the core barrel body 54. When the axial flange 2 551 is screwed into the annular sink hole 541, the annular conical surface of the axial flange 3 553 will gradually approach the first conical surface 543, and finally be able to fully fit with the first conical surface 543. A sealing ring is fixedly provided on the first conical surface 543 , and when the annular conical surface of the axial flange 553 is in contact with the first conical surface 543 , the sealing ring can be elastically deformed.

[0052] The core barrel 2 57 is matched with the core barrel 1 54 through a threaded structure, and one end (right end) of the core barrel 2 57 is extended into the core barrel 1 54 and matched with the infrared temperature measuring probe 60. Specifically, a threaded through hole 542 is formed at one end of the core barrel 1 54 facing the end ring 55 and at the port. The inner diameter of the threaded through hole 542 is smaller than the inner diameter of the core barrel 1 54. The outer wall of the core barrel 2 57 is formed as an external threaded surface, and the external threaded surface is matched with the threaded through hole 542, so that the core barrel 2 57 can be matched with the core barrel 1 54 through a threaded structure and connected together. Therefore, the axial position / position in the left and right direction of the core barrel 2 57 relative to the core barrel 1 54 can be adjusted, and then the detection end of the infrared temperature measuring probe 60 can be adjusted to the position of the closed end of the outer shell, that is, the detection end of the infrared temperature measuring probe 60 can be adjusted to the position of the cap cavity of the end cap 52.

[0053] The other end (left end) of the core barrel 2 57 is fixedly connected to one end (right end) of the core barrel 3 58. The other end (left end) of the core barrel 3 58 is fixed to the outer shell. Specifically, a radial flange 2 583 is formed at the port of the core barrel 3 58 facing one end of the core barrel 2 57. An internal thread surface is formed on the radial flange 2 583, and the internal thread surface can correspond to the external thread surface provided on the outer wall of the core barrel 2 57, so that the core barrel 2 57 and the opposite ends of the core barrel 3 58 can be connected. A first annular flange 581 is formed at the other end of the core barrel 3 58, and a countersunk hole 5141 is correspondingly formed at the port of the outer shell body 51. The first annular flange 581 can be inserted into the countersunk hole 5141, and after the end barrel 53 and the outer shell body 51 are docked and connected, it is clamped between the two flange ends, thereby achieving the fixation of the left end of the core barrel 3 58.

[0054] For the convenience of assembly, a second annular flange 582 is formed at one end of the core barrel 3 58 extending into the shell body 51, and the outer diameter of the second annular flange 582 is consistent with the inner diameter of the axial cavity 511. In order to improve the cooling effect of the cold air in the closed end of the shell body, that is, in the target space 70 on the cap cavity side near the end cap 52. A plurality of fin plates 546 are arranged on the inner wall of the core barrel 1 54 and are alternately distributed around the circumferential direction. The length direction of the fin plates 546 is consistent with the axial direction of the core barrel 1 54, and the width direction is along the radial direction of the core barrel 1 54. After the fin plates 546 are arranged, the heat exchange surface of the cold air can be increased.

[0055] In order to promote the hot air to flow into the connecting hole 545 quickly, it is discharged to the outside from the exhaust pipe 56. A second conical surface 544 is formed at one end of the core barrel 54 close to the window portion 522 and at the end of the outer peripheral surface, and the small diameter end of the second conical surface 544 is made a free end to increase the relative peripheral surface spacing between the core barrel 54 and the end cap 52, so as to promote the hot air flow to converge at the port of the connecting hole 545. One end of the connecting hole 545 extends to the root of the second conical surface 544. A fan (such as a duct fan) is connected to the exhaust pipe 56. When the fan is started, a heat exchange airflow can be formed in the shaft cavity of the core barrel group, the connecting hole 545 and the annular sink 552, so as to continuously introduce cold air and discharge hot air.

[0056] like Figures 2 to 8As shown, a pair of arm plates 571 arranged opposite to each other in the radial direction are formed at one end (right end) of the core barrel 2 57 extending into the core barrel 1 54. The probe fixing sleeve 61 of the infrared temperature measuring probe 60 is correspondingly arranged between the two arm plates 571, and is matched with the arm plates 571 through the pivot portion 611 arranged on the probe fixing sleeve 61, so that the infrared temperature measuring probe 60 can rotate relative to the arm plates 571 in the vertical plane, and the infrared rays emitted by the infrared temperature measuring probe 60 can be tilted to different angles relative to the horizontal direction, so that the temperature of multiple positions on the furnace lining 13 at the top can be measured. Bosses 572 are formed on the arm plates 571, and shaft hole structures corresponding to and matching the pivot portion 611 are formed on the bosses 572.

[0057] A connecting rod is formed on the probe fixing sleeve 61, which passes through the barrel cavity of the core barrel 2 57 and extends into the core barrel 3 58. A gear portion 62 is formed at the end of the connecting rod. Correspondingly, a rack unit 59 is provided on the core barrel 3 58. The rack body 591 of the rack unit 59 is arranged along the vertical direction and is provided in the core barrel 3 58, and can mesh and match with the gear portion 62. The rod portions provided at the upper and lower ends of the rack body 591 are both extended to the outside of the core barrel 3 58 and matched with the transmission portion, and the height position of the rack body 591 in the vertical direction can be adjusted, so that the inclination amplitude of the infrared temperature measuring probe 60 relative to the horizontal direction can be adjusted and controlled.

[0058] The rod portion includes a screw portion 592 and a screw portion 595 respectively fixed to the upper end and the lower end of the rack body 591.

[0059] The optical column segment of the screw part 592 passes through the first through hole 584 provided on the core barrel 3 58, and the external thread segment thereon is relatively located in the annular gap area between the core barrel 3 58 and the shell body 51. A transmission part is provided on the external thread segment of the screw part 592, and the transmission part includes a spring 593 and a nut 594. The two ends of the spring 593 are respectively in contact with the lower end surface of the nut 594 and the outer wall surface of the core barrel 3 58. By screwing the nut 594 and adjusting its height position relative to the external thread segment on the screw part 592, the initial / original compression degree of the spring 593 can be adjusted. A sealing ring is provided on the first through hole 584, and a sealing structure is formed between the optical column segment of the screw part 592 and the relative circumferential surface of the first through hole 584.

[0060] The light column segment on the second screw part 595 passes through the second through hole 585 provided on the third core tube 58. Similarly, a sealing ring is provided on the second through hole 585, and a sealing structure is formed between the light column segment of the second screw part 595 and the relative circumference of the second through hole 585. The lower end of the second screw part 595 passes through the annular gap area between the third core tube 58 and the shell body 51, and then passes out to the outside of the shell body 51. And the external thread segment provided on the second screw part 595 is relatively located outside the shell body 51, and the transmission part provided on the external thread segment includes a nut 2 596. Screwing the nut 2 596 and adjusting its height position relative to the external thread segment on the second screw part 595 can push and pull the second screw part 595 to move downward, thereby driving the rack body 591 to move in the vertical direction, so that the meshing position between it and the gear part 62 changes, and can promote the rotation of the infrared temperature measuring probe 60. The stretching elastic force of the spring 593 forms a pulling force that drives the rack body 591 to return to its original position upward.

[0061] A gear body can be fixedly set on the nut 596, and a rack transmission unit can be configured corresponding to the gear body. The gear body is driven by the rack transmission unit to rotate (around the vertical axis) to make the nut 596 rotate synchronously to adjust the height position of the nut 596 relative to the screw part 595, so as to realize automatic adjustment and control of the inclination angle of the infrared temperature measuring probe 60 relative to the horizontal direction, and can automatically monitor the temperature of a section on the furnace lining 13 at the top in real time, thereby increasing the temperature detection range, which helps to control the discharge temperature of the molten metal more reliably and accurately.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A temperature detection device for a recycling iron-making furnace, comprising a recycling iron-making furnace (10), a burner hole cover (20) and a chimney (40) respectively arranged at a burner hole (11) and an exhaust hole (12) of the recycling iron-making furnace (10); characterized in that: It also includes at least one infrared probe temperature measurement assembly (50); the infrared probe temperature measurement assembly (50) includes an outer shell, a core barrel group fixedly arranged in the outer shell, and an infrared temperature measurement probe (60) fixedly arranged on the core barrel group; One end of the outer shell is an open end, and the other end is a closed end; the detection end of the infrared temperature probe (60) is close to the closed end and a window portion (522) for infrared radiation is provided on the closed end; the axial cavity of the core barrel group is connected to the open end and the closed end of the outer shell to form a cold air flow channel; the outer wall of the core barrel group and the inner wall of the outer shell are sealed and matched; a hot air flow channel is formed on the inner half wall of the core barrel group and the air inlet of the hot air flow channel is formed at the inner end of the core barrel group; an exhaust pipe (56) is provided on the outer shell and penetrates into the outer shell and is connected to the closed end of the hot air flow channel; The outer shell is fixed at a corner position of the chimney (40) and / or fixed on the burner hole cover (20), so that the infrared rays emitted by the infrared temperature measuring probe (60) are inclined upward and can reach the furnace lining (13) at the top of the furnace chamber of the return iron furnace (10).

2. The temperature detection device for the recycling iron-making furnace according to claim 1 is characterized in that: The outer shell comprises a cylindrical outer shell body (51), and an end cap (52) and an end cylinder (53) fixedly connected to both ends of the outer shell body (51); a window portion (522) is formed on the bottom wall of the end cap (52); A radial flange 1 (512) is formed in the axial cavity (511) of the shell body (51) and on a side close to the end cap (52); the core barrel assembly and the radial flange 1 (512) are matched and connected together by a threaded structure, thereby blocking the axial cavity (511) into two unconnected sections.

3. The temperature detection device for a recycling iron-making furnace according to claim 1 or 2, characterized in that: The core barrel assembly includes a core barrel 1 (54), an end ring (55), a core barrel 2 (57) and a core barrel 3 (58); The outer wall of the core barrel 1 (54) is sealed and matched with the inner wall of the outer shell; a plurality of communication holes (545) are distributed on the wall of the core barrel 1 (54), and one end of the core barrel 1 (54) is close to the window portion (522), and the other end is fixedly connected to the end ring (55); An annular recessed groove (552) is formed on the end ring (55) and is capable of being simultaneously communicated with the same side ends of each communication hole (545), and enables the exhaust pipe (56) to be communicated with the annular recessed groove (552); The second core barrel (57) is matched with the first core barrel (54) through a threaded structure, so that one end of the second core barrel (57) extends into the first core barrel (54) and matches with the infrared temperature measuring probe (60), and the other end is fixedly connected to one end of the third core barrel (58); the other end of the third core barrel (58) is fixed to the outer shell.

4. The temperature detection device for the recycling iron-making furnace according to claim 3 is characterized in that: A pair of arm plates (571) are formed at one end of the second core tube (57) extending into the first core tube (54); the infrared temperature measuring probe (60) is correspondingly arranged between the two arm plates (571) and matched with the arm plates (571) via a pivot portion (611) arranged on the probe fixing sleeve (61), so that the infrared temperature measuring probe (60) can rotate relative to the arm plates (571) in a vertical plane; A connecting rod is formed on the probe fixing sleeve (61) and passes through the barrel cavity of the second core barrel (57) and extends into the third core barrel (58); a gear portion (62) is formed at the end of the connecting rod; A rack unit (59) is provided on the core barrel three (58); a rack body (591) of the rack unit (59) is arranged along the vertical direction and is provided in the core barrel three (58), and can mesh with the gear part (62); rod parts provided at the upper and lower ends of the rack body (591) are both extended to the outside of the core barrel three (58) and matched with the transmission part, so that the height position of the rack body (591) in the vertical direction can be adjusted, thereby adjusting the inclination amplitude of the infrared temperature measuring probe (60) relative to the horizontal direction.

5. The temperature detection device for the recycling iron-making furnace according to claim 4 is characterized in that: The rod portion comprises a screw portion 1 (592) and a screw portion 2 (595) fixedly arranged at the upper and lower ends of the rack body (591); the transmission portion on the screw portion 1 (592) comprises a spring (593) and a nut 1 (594), so that the two ends of the spring (593) are in contact with the nut 1 (594) and the core barrel 3 (58) respectively; the transmission portion on the screw portion 2 (595) comprises a nut 2 (596).

6. The temperature detection device for the recycling iron-making furnace according to claim 3 is characterized in that: A plurality of fin plates (546) are arranged on the inner wall of the core barrel (54) and are distributed alternately in the circumferential direction; the length direction of the fin plates (546) is consistent with the axial direction of the core barrel (54), and the width direction is along the radial direction of the core barrel (54).

7. The temperature detection device for the recycling iron-making furnace according to claim 3 is characterized in that: A second conical surface (544) is formed at one end of the core tube (54) close to the window portion (522) and at the end of the outer peripheral surface; the small diameter end of the second conical surface (544) is a free end; and one end of the connecting hole (545) extends to the root of the second conical surface (544).

8. The temperature detection device for a recycling iron-making furnace according to claim 1 is characterized in that: The infrared temperature measuring probe (60) is pivotally matched with one end of the core barrel assembly close to the closed end of the outer shell, so that the infrared temperature measuring probe (60) can rotate in a vertical plane; a gear portion (62) is formed on one end side of the infrared temperature measuring probe (60); A rack unit (59) is provided on the core barrel assembly; a rack body (591) of the rack unit (59) is arranged in the vertical direction and is provided in a barrel cavity of the core barrel assembly close to the open end of the outer shell; the rack body (591) can mesh with the gear part (62); rod parts provided at the upper and lower ends of the rack body (591) are both extended to the outside of the core barrel assembly and matched with the transmission part, and the height position of the rack body (591) in the vertical direction can be adjusted to control the inclination amplitude of the infrared temperature measuring probe (60) relative to the horizontal direction.

9. The temperature detection device for a recycling iron-making furnace according to claim 8, characterized in that: The rod portion comprises a screw portion 1 (592) and a screw portion 2 (595) fixedly arranged at the upper and lower ends of the rack body (591); the transmission portion on the screw portion 1 (592) comprises a spring (593) and a nut 1 (594); the two ends of the spring (593) are in contact with the nut 1 (594) and the outer wall surface of the core barrel assembly respectively; the transmission portion on the screw portion 2 (595) is arranged outside the outer shell and comprises a nut 2 (596).

10. The temperature detection device for a recycling iron-making furnace according to claim 1, characterized in that: A heat insulating layer (515) is provided on the outer wall of the outer shell at least on one side close to the closed end thereof.

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