CN210399543U

CN210399543U - Hot-blast furnace top temperature thermocouple installation device

Info

Publication number: CN210399543U
Application number: CN201921101908.6U
Authority: CN
Inventors: 杨莉; 刘雪峰
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-04-24
Anticipated expiration: 2029-07-15

Abstract

The utility model discloses a hot-blast furnace top temperature thermocouple installation device belongs to thermal technology instrument and detects technical field. The hot blast stove top temperature thermocouple mounting device comprises a flange connecting pipe, a protective pipe, an insulating support pipe, a thermocouple wire, a filler, a single flange, a blind flange, a first high-temperature asbestos plate and a second high-temperature asbestos plate, and can be used for being mounted in a thermocouple mounting hole used for original hot blast stove top temperature measurement or a temperature measuring thermocouple mounting hole newly formed in a hot blast stove top temperature measuring position, finished product thermocouples are not needed, cost is effectively saved, and production benefits of enterprises are improved. The method has the characteristics of simple installation method, convenient maintenance, good sealing performance and low spare part cost, and can be popularized and applied to installation and use of blast furnace ironmaking hot blast stove top temperature measuring thermocouples in the whole metallurgical industry, installation and use of other similar high-temperature high-pressure combustion furnace thermocouples, and the like.

Description

Hot-blast furnace top temperature thermocouple installation device

Technical Field

The utility model belongs to the technical field of thermal technology instrument detects, concretely relates to hot-blast furnace top temperature thermocouple installation device especially relates to a blast furnace ironmaking hot-blast furnace roof tepid galvanic couple installation device.

Background

The hot blast stove is important equipment for blast furnace iron making, and mainly has the function of conveying hot blast to the blast furnace for smelting pig iron. The top temperature of the hot blast stove is one of important detection parameters for the operation control of the hot blast stove, and the B-type noble metal thermocouple is usually adopted for detection, and the hot blast stove operates under the environment that the high temperature is 1200-1350 ℃ and the pressure in the stove is 0-0.6 MPa alternately in the production process, so the installation requirement of the thermocouple for detecting the top temperature is very strict. At present, a plurality of thermocouples are used, the structure and the method of the existing installation device are complex, and under the large trend of reducing the cost in the whole industry, the service life of the thermocouple needs to be prolonged, the structure and the method of the installation device are simplified, and the consumption cost of the temperature thermocouple is reduced.

At present, finished thermocouples (thermocouples which are assembled and processed by manufacturers such as thermocouple wires, protective tubes serving as insulating supports, protective tubes, mounting and fixing pieces, junction boxes and the like) are mainly adopted as the used thermocouples, and the cost is high. The thermocouple is mainly sealed by the protection tube to prevent hot air leakage, and once the protection tube goes wrong, hot air in the hot blast stove directly leaks to the outside of the stove body through the junction of the junction box, thereby causing hidden danger to equipment and personal safety and influencing effective detection of the thermocouple, thereby ensuring that blast furnace ironmaking can not be normally carried out. In order to overcome the problem that the sealing of the thermocouple protection tube is damaged once the thermocouple protection tube has problems, and the normal burning and air supply of the hot blast stove are influenced, a manufacturer takes measures of adding an outer protection tube outside a single-layer thermocouple protection tube, installing an outer metal protection sleeve and the like, and the protection tubes are bonded by adopting a bonding material. Although the impact of high-temperature and high-pressure hot air on the thermocouple can be reduced by additionally arranging the outer protection tube outside the single-layer protection tube, the high-temperature and high-pressure endured by the thermocouple for a long time often causes the adhesive to fall off to form a gap, so that the hot air leaks out of the thermocouple. In order to ensure that the double-layer protective sleeve does not leak air from the junction box when a gap or a fracture occurs, a manufacturer seals the inside of the junction box by using a sealant or adopts a flange-type junction box, so that the influence of air leakage on the normal production of the hot blast stove is avoided to a certain extent, but the cost of purchasing a thermocouple by a user is increased.

The existing thermocouple and the installation method thereof mainly comprise the following steps:

1) publication No. CN103307755B discloses a hot blast stove top thermocouple installation device and a method, wherein the device comprises: the outer protection tube is arranged below the small access hole flange on the top of the hot blast stove and is fixed at the center of the access hole, and a fixing ring is arranged in the outer protection tube; the inner protection tube is sleeved in the outer protection tube and penetrates through the small access hole flange and the fixing ring; a compression spring and a movable ring are sleeved outside the inner protection tube, and the compression spring is arranged between the small access hole flange and the movable ring; the outer wall of the inner protection pipe arranged between the fixed ring and the movable ring is wound with an asbestos rope; a thermocouple is placed in the inner storage tube and fixed on a thermocouple mating flange at the upper pipe orifice of the inner protection tube through a flange or a flange packing box. The disclosed document effectively protects the thermocouple by using the inner and outer protection tubes, and improves the service life of the thermocouple. And effectively solves the problem that the flange connecting pipe blocks the expansion with heat and contraction with cold of the refractory brick in the furnace, and prolongs the service life of the hot blast stove.

2) Publication No. CN1022347C discloses a noble metal thermocouple mounting structure, which belongs to the field of temperature measurement. The mounting structure is characterized in that an outer sleeve brick with a prefabricated temperature measuring hole is built in the furnace, and a cold end sealing assembly is adopted outside the furnace to replace a fixing part and a cold end junction box. The mounting structure solves the problem that the protection tube is easy to break, prolongs the service life of the noble metal thermocouple (used for the hot blast stove for more than one year), improves the measurement accuracy and can inhibit the occurrence of theft cases. Heat loss is reduced, and the maintenance working environment is improved.

3) Publication No. CN201247104Y discloses a thermocouple mounting structure, which includes an upper flange, a lower flange, a screw thread pressing cap, a hollow screw thread seat is arranged at the top end of the upper flange, the screw thread pressing cap is arranged outside the screw thread seat to match with the screw thread seat, and a thermocouple is positioned in a channel formed by the central holes of the screw thread seat, the upper flange and the lower flange. And a space formed by the threaded seat, the upper flange and the thermocouple is internally provided with a filler. The upper part of the filler is provided with a movable pressing cap. Compared with the prior art, the beneficial effects of the publication are: 1. the flange does not need to be disassembled when the thermocouple is replaced, the operation time is greatly reduced, the working efficiency is improved, and the problem of air leakage caused by incorrect installation of the flange is also avoided. 2. The thermocouple does not need to be provided with a flange, so that the cost is effectively saved, and the production benefit of an enterprise is improved.

The method 1) adopts finished couples, so that the cost is high; although the outer layer protection pipe (namely the instrument flange connection pipe) can freely move up and down along with the expansion with heat and the contraction with cold of the refractory brick, the problem that the expansion with heat and the contraction with cold of the refractory brick in the furnace are blocked by the flange connection pipe is effectively solved, the clearance between the galvanic couple (phi 20-phi 30) and the outer protection pipe (phi 57, the wall thickness is 3.5mm) is very large, and the galvanic couple is easily vibrated and broken under the influence of air flow; the thermocouple is arranged at the position of the access hole, the thermocouple needs to be pulled out and inserted again as long as the access hole needs to be opened for maintenance, although the inner protection tube can be taken out during maintenance, the thermocouple is pulled out and inserted in a high temperature difference environment with the temperature of over 1200 ℃ outside the furnace, so that the protection tube is rapidly heated and breaks, and the thermocouple is damaged; in addition, the position of the access hole is not necessarily the position of the required temperature measuring point; the device and the method have the advantages of multiple devices and complex installation. 2) The middle mounting structure needs to build an outer sleeve brick with a length capable of penetrating through the masonry at a temperature measuring point of the kiln, can be completed only in basic construction technology improvement or overhaul, and is not beneficial to implementing projects at any time; the aperture of a temperature measuring hole reserved on the outer sleeve brick is larger than the diameter of the protection tube, a gap between the cold end and the extension tube is tightly plugged by a asbestos rope, and the thermocouple protection tube is easy to vibrate and break at an accelerated speed under the impact of airflow in the hot blast stove due to gaps; the diameter of a temperature measuring hole reserved on the outer sleeve brick is fixed, and only a protective pipe with fixed size can be installed; the overall mounting structure is complicated. 3) The finished product galvanic couple is adopted, so that the cost is high; a gap exists between the thermocouple protection tube and the extension tube, and the thermocouple protection tube is easy to vibrate and break under the impact of airflow in the hot blast stove, so that the thermocouple is short in service life and high in consumption; the adopted thread structure is deformed under the influence of high temperature, and is not beneficial to disassembly.

SUMMERY OF THE UTILITY MODEL

One or more to the problem that exists among the prior art, the utility model provides a hot galvanic couple installation device is warmed up on hot-blast furnace top, it is used for installing in the thermocouple mounting hole that hot-blast furnace top temperature measurement used, the hot galvanic couple installation device is warmed up on hot-blast furnace top includes:

the flange connecting pipe (3) is fixedly connected with the hot blast stove top metal shell (1) on the outer side of the thermocouple mounting hole, and the flange connecting pipe (3) is communicated with the thermocouple mounting hole;

the protection tube (11) is provided with an opening at one end and a sealing at one end, the sealed end extends into the hot blast stove from the thermocouple mounting hole, and the opened end is flush with the end, far away from the hot blast stove, of the flange connecting tube (3);

the insulating support pipe (12) is of a double-hole pipeline structure, one end of the insulating support pipe is arranged in the protection pipe (11), and the other end of the insulating support pipe is flush with the end parts of the protection pipe (11) and the flange connecting pipe (3);

the thermocouple wire (13) comprises a thermocouple wire anode (131) and a thermocouple wire cathode (132) which are respectively arranged in the double-hole pipeline of the insulating support pipe (12) in a penetrating way;

a filler (10) filled in a gap between the protection tube (11) and the thermocouple mounting hole and the flange connection tube (3);

the single flange (4) is connected with one end, far away from the hot blast stove, of the flange connecting pipe (3) and is kept flush;

the blind flange (5) is arranged at the end part of one end of the flange connecting pipe (3) far away from the hot blast stove and is fixedly connected with the single flange (4);

the first high-temperature asbestos plate (6) is fixedly arranged between the single flange (4) and the blind flange (5), and two thermocouple wire outlet holes (61) are formed in the center of the first high-temperature asbestos plate (6) and used for penetrating through the thermocouple wire anode (131) and the thermocouple wire cathode (132); and

and the second high-temperature asbestos plate (7) is fixedly arranged between the first high-temperature asbestos plate (6) and the blind flange (5).

The thermocouple mounting hole is a thermocouple mounting hole used for the original hot blast stove top temperature measurement or a temperature thermocouple mounting hole newly formed at the temperature measurement position of the hot blast stove top.

The thermocouple mounting hole is in a circular truncated cone shape with a narrower inner side of the furnace and a wider outer side of the metal shell.

The filler (10) is damping mud.

The length of the thermocouple wire (13) is 1250mm, and the length of the insulating support tube (12) is 1000 mm; the thermocouple wire anode (131) and the thermocouple wire cathode (132) respectively penetrate through the two thermocouple wire outlet holes (61) in the center of the first high-temperature asbestos plate (6).

The thermocouple wire positive electrode (131) and the thermocouple wire negative electrode (132) extend in two opposite directions between the first high-temperature asbestos plate (6) and the second high-temperature asbestos plate (7), respectively.

The protection tube (11) is a corundum protection tube with the length of 1000mm phi 15 x 20.

The single flange (4), the first high-temperature asbestos plate (6), the second high-temperature asbestos plate (7) and the blind flange (5) are fixedly connected through flange fastening bolts (8) and flange fastening nuts (9).

The hot blast stove top temperature thermocouple installation device based on the technical scheme is simple in installation method, convenient to maintain, good in sealing performance and low in spare part cost. The thermocouple installation device can be installed on site by utilizing the existing hot blast stove top temperature measuring thermocouple installation hole, the flange connecting pipe, the fixed flange and the like, is convenient to implement transformation at any time, and reduces waste; the thermocouple installation device of the utility model adopts the field assembly of the thermocouple wires, the double-hole corundum insulation protection tube, the corundum protection tube and other parts, thus greatly reducing the purchase cost of spare parts; the utility model discloses a thermocouple installation device adopts the on-the-spot damping mud that uses of blast furnace, utilizes high temperature resistant asbestos board scene can process the high temperature resistant asbestos board pad of preparation and with the supporting blind flange of original mounting flange (the blind flange need process or utilize former damage galvanic couple mounting flange transformation system), realizes thermocouple installation device sealed inside and outside the hot-blast furnace, improves thermocouple installation device's life, reduce cost and maintenance cost. Compared with the prior art, the utility model discloses following beneficial effect has:

1) finished thermocouples are not needed, and the spare part purchasing cost is effectively reduced;

2) the protection tube of the thermocouple installation device of the utility model is firmly fixed by damping mud without generating vibration influence, thereby avoiding the problem of air leakage caused by the fracture of the thermocouple protection tube, reducing the furnace-stifling processing fault time and frequency of the hot blast furnace, ensuring the continuous production of the blast furnace, increasing the yield and improving the production benefit of enterprises;

3) the interior of the thermocouple installation device is reliably isolated from the outside, so that the phenomenon that the thermocouple is polluted and poisoned is prevented, the service life of the thermocouple is prolonged, the temperature measurement error is reduced, and the consumption cost of spare parts is saved.

To sum up, the utility model provides a thermocouple installation device has simple structure, mounting method characteristics simple and easy, easy maintenance, sealing performance are good, spare part is with low costs, can popularize and apply to the installation of the hot-blast furnace top temperature measurement thermocouple of blast furnace ironmaking of full metallurgical industry and use and other similar high temperature high pressure combustion furnace thermocouples installation and use etc. reach the target of cost reduction increase.

Drawings

FIG. 1 is a schematic structural view of a top temperature thermocouple installation device of a hot blast stove provided by the present invention;

FIG. 2 is a schematic structural view of a single flange in the structure of the installation device for the thermocouple at the top temperature of the hot blast stove provided by the present invention;

FIG. 3 is a schematic structural view of a blind flange in the structure of the installation device for the thermocouple at the top temperature of the hot blast stove provided by the present invention;

FIG. 4 is a schematic structural view of a first high temperature asbestos plate in the structure of the installation device for the thermocouple at the top temperature of the hot blast stove provided by the present invention;

FIG. 5 is a schematic structural view of a second high temperature asbestos plate in the hot blast stove top temperature thermocouple installation device structure provided by the present invention;

in the figure: 1-a hot blast stove top metal shell, 2-a refractory brick, 3-a flange connecting pipe, 4-a single flange, 5-a blind flange, 6-a first high-temperature asbestos plate, 7-a second high-temperature asbestos plate, 61-a thermocouple wire outlet hole, 8-a flange fastening bolt, 9-a flange fastening nut, 10-a filler, 11-a protective pipe, 12-an insulating support pipe, 13-a thermocouple wire, 131-a thermocouple wire anode and 132-a thermocouple wire cathode.

Detailed Description

The utility model aims to provide a hot blast furnace top thermocouple installation device with simple installation method, convenient maintenance, good sealing performance and low spare part cost. The utility model can utilize the existing hot blast stove top temperature measuring thermocouple mounting hole, flange connecting pipe and fixing flange, etc., which is convenient for the reconstruction at any time and reduces the waste; the utility model can adopt the thermocouple installation device assembled on site by the parts such as the thermocouple wire, the double-hole corundum insulation protection tube, the corundum protection tube and the like, thus greatly reducing the procurement cost of spare parts; the utility model discloses can adopt the damping down mud of the on-the-spot use of blast furnace, utilize high temperature resistant asbestos board scene can process the high temperature resistant asbestos board of preparation pad and with the supporting blind flange of original mounting flange, realize thermocouple installation device in the inside and outside sealing of hot-blast furnace, improve thermocouple installation device's life, reduce cost and maintenance cost.

The present invention will be described in detail with reference to the following embodiments.

The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, and the embodiment will help understanding the present invention, but should not be taken as a limitation to the content of the present invention.

As shown in fig. 1, the utility model provides a hot-blast furnace top temperature thermocouple installation device's schematic structure is shown, this hot-blast furnace top temperature thermocouple installation device is used for installing in the thermocouple mounting hole that hot-blast furnace top temperature measurement used (for example original hot-blast furnace top temperature measurement used thermocouple mounting hole or the new temperature thermocouple mounting hole of seting up in hot-blast furnace top temperature measurement department), wherein this thermocouple mounting hole is for leaning on the interior firebrick 2 side of stove narrower, lean on the round platform type of the outer metal casing 1 side broad of stove, and its size need not fix specially. This hot-blast furnace top temperature thermocouple installation device includes: the thermocouple comprises a flange connecting pipe 3, a protective pipe 11, an insulating support pipe 12, a thermocouple wire 13, a filler 10, a single flange 4, a blind flange 5, a first high-temperature asbestos plate 6 and a second high-temperature asbestos plate 7. The flange connecting pipe 3 can be a flange connecting pipe for installing and fixing a thermocouple in an original temperature thermocouple mounting hole, or a flange connecting pipe newly welded and fixed on the outer side of the metal shell 1 of the hot blast stove top and communicated with the thermocouple mounting hole, and preferably, the axis of the thermocouple mounting hole and the axis of the flange connecting pipe 3 are on the same straight line. Protection tube 11 is one end opening, the sealed corundum protection tube of one end, and in sealed one end stretched into the hot-blast furnace through the thermocouple mounting hole, the one end parallel and level of hot-blast furnace was kept away from to open-ended one end and flange joint pipe 3, its size can be length 1000mm phi 15 x 20, nevertheless the utility model discloses in do not limit, can select according to actual need. The protection tube 11 is provided with an insulating support tube 12 which is a double-hole pipeline structure and can be a corundum insulating tube with double holes 6 x 1.8mm and length of 1000mm, one end of the corundum insulating tube is arranged in the protection tube 11, and the other end of the corundum insulating tube is flush with the protection tube 11 and the end part of the flange connecting tube 3. The thermocouple wire 13 is arranged in the insulating support tube 12, comprises a thermocouple wire anode 131 and a thermocouple wire cathode 132, and is respectively arranged in the double-hole pipeline of the insulating support tube 12, the length of the thermocouple wire 13 can be 1250mm (not limited to the length), and therefore, the thermocouple wire 13 is exposed from one end of the insulating support tube 12, which is flush with the end of the protection tube 11 and the flange connecting tube 3. The filler 10 may be damping mud, which is used to fill a gap between the protection tube 11 and the thermocouple mounting hole (i.e., between the protection tube 11 and the refractory brick 2 and the metal shell 1 of the furnace top of the hot blast stove) and the flange connection tube 3, and is compacted to ensure that the plane of the filler 10 is flush with the end portions of the protection tube 11 and the flange connection tube 3, so as to fix the thermocouple protection tube 11. The single flange 4 and one end of the flange connecting pipe 3, which is far away from the hot blast stove, are fixedly connected and kept parallel and level, and can be a single flange connected with the flange connecting pipe 3 which is externally provided with a fixed thermocouple in the original mounting hole, or a single flange which is newly welded on the flange connecting pipe 3, so that the end surface of the filler 10 after being filled is also parallel and level with the end surface of the single flange 4. The blind flange 5 is disposed at an end of the flange connecting pipe 3 away from the hot blast stove, and is fixedly connected to the single flange 4, for example, by a flange fastening bolt 8 and a flange fastening nut 9, as shown in fig. 2, and corresponding screw holes are respectively disposed on the blind flange 5 and the single flange 4. Still be provided with first high temperature asbestos board 6 and second high temperature asbestos board 7 between blind flange 5 and single flange 4, the central point of first high temperature asbestos board 6 puts the diplopore pipeline of just insulating support pipe 12, and seted up two thermocouple wire outlet openings 61, thermocouple wire positive pole 131 and thermocouple wire negative pole 132 that expose from the diplopore pipeline of insulating support pipe 12 like this pass two thermocouple wire outlet openings 61 respectively, this thermocouple wire positive pole 131 and thermocouple wire negative pole 132 can extend and draw forth along two opposite directions on first high temperature asbestos board 6 afterwards, so that insert in the temperature measurement circuit, and fix respectively in the planar both sides of first high temperature asbestos board 6 through insulating tape, second high temperature asbestos board 7 and first high temperature asbestos board 6 compress tightly the thermocouple wire positive pole 131 and thermocouple wire negative pole 132 that set up between them and fix. As shown in fig. 2, correspondingly, screw holes corresponding to the screw holes formed in the blind flange 5 and the single flange 4 are also respectively formed in the second high-temperature asbestos plate 7 and the first high-temperature asbestos plate 6 for penetrating the flange fastening bolt 8 and the flange fastening nut 9, so as to fixedly connect the single flange 4, the first high-temperature asbestos plate 6, the second high-temperature asbestos plate 7 and the blind flange 5, wherein the single flange 4, the first high-temperature asbestos plate 6, the second high-temperature asbestos plate 7 and the blind flange 5 shown in the embodiment are circular, but the utility model discloses not limited thereto, it can also be rectangular, oval, etc.

The utility model provides an embodiment's hot-blast furnace roof temperature thermocouple installation device's mounting method does: firstly, thermocouple mounting holes used for measuring the temperature of the original hot blast stove top can be utilized, if the hot blast stove top is newly mounted, temperature measuring thermocouple mounting holes are required to be formed in a metal shell 1 and a refractory brick 2 of the hot blast stove top at the temperature measuring position, and the mounting holes are in a circular truncated cone shape with a narrower inner side and a wider outer metal shell side; the flange connecting pipe 3 and the single flange 4 for installing and fixing the thermocouple outside the original installation hole can still be utilized, and if the flange connecting pipe and the single flange are not used, the flange connecting pipe and the single flange need to be processed and welded on the metal shell 1 at the top of the hot blast stove; secondly, respectively penetrating two thermocouple wire positive electrodes 131 and two thermocouple wire negative electrodes 132 of a thermocouple wire 13 with the length of 1250mm into a double-hole corundum insulating support pipe 12 serving as an insulating support, wherein the double-hole corundum insulating support pipe 12 is double-hole 6 x 1.8mm and has the length of 1000 mm; and thirdly, filling the thermocouple mounting hole, the flange connecting pipe 3 and the single flange 4 plane with the filler 10 (damping mud in the embodiment) and tamping firmly to ensure that the filler 10 plane and the single flange 4 plane are flush. A corundum protection tube 11 with the length of 1000mm phi 15 x 20 is inserted into the filler 10 from the center position of the plane of the single flange 4 and perpendicular to the plane of the single flange 4, penetrates through the filler 10, and is inserted into the hot blast furnace from the exposed head of the refractory brick 2. Tamping the filler 10 again to ensure that the filler 10 is tightly combined with the corundum protection tube 11, the refractory brick 2, the flange connecting tube 3 and the single flange 4 without gaps; the filler 10 plane is flush with the single flange 4 plane. Fourthly, inserting a thermocouple wire 13 penetrating through the double-hole corundum insulation support tube 12 into the corundum protection tube 11, wherein the hot end of the thermocouple wire is arranged on the inner side of the corundum protection tube 11. Placing a first high-temperature asbestos plate 6 on the plane of a single flange 4, respectively penetrating a thermocouple wire anode 131 and a thermocouple wire cathode 132 of a thermocouple wire 13 exposed outside a corundum protection tube 11 out of two thermocouple wire outlet holes 61 of the first high-temperature asbestos plate 6, respectively fixing the thermocouple wire anode 131 and the thermocouple wire cathode 132 which are tightly attached to the first high-temperature asbestos plate 6 on two sides of the plane of the first high-temperature asbestos plate 6 in opposite directions by using insulating tapes, respectively, and then sequentially pasting a second high-temperature asbestos plate 7 and a blind flange 5 on the first high-temperature asbestos plate 6 to ensure that screw holes on the single flange 4, the first high-temperature asbestos plate 6, the second high-temperature asbestos plate 7 and the blind flange 5 are all aligned, and at the moment, the thermocouple wire anode 131 and the thermocouple wire cathode 132 are respectively led out from two sides of the middle of the first high-temperature asbestos plate 6 and the second high-temperature asbestos plate 7; fifthly, the single flange 4, the first high-temperature asbestos plate 6, the second high-temperature asbestos plate 7 and the blind flange 5 are evenly and tightly fastened by using flange fastening bolts 8 and flange fastening nuts 9, and the pair of flanges 4 and 5 and the flange fastening bolts 8 and 9 are matched to tightly press the two high-temperature asbestos plates 6 and 7, so that the interior of the thermocouple installation device is isolated from the outside. And finally, connecting the thermocouple wire anode 131 and the thermocouple wire cathode 132 of the thermocouple wire 13 into a temperature measuring loop (or not), so as to finish the installation process of the hot blast stove top temperature thermocouple installation device.

The utility model provides a thermocouple installation device damping mud, single flange 4, first high temperature asbestos board 6, second high temperature asbestos board 7 and blind flange 5 that use in the installation can effectually keep apart hot-blast furnace inside and hot-blast furnace outside, even thermocouple protection tube 11 damages, hot-blast also can not follow broken protection tube 11 outflow outside the stove in the hot-blast furnace. Meanwhile, gas in the external environment cannot enter the thermocouple protection tube 11 to pollute the thermocouple wire 13, so that the poisoning of the thermocouple wire 13 is reduced, the service life of the thermocouple installation device can be prolonged, and the temperature measurement error is reduced. The problem that the hot blast stove is blocked to process the thermocouple installation device and the production of the blast furnace is influenced is avoided.

The utility model provides a hot galvanic couple installation device is warmed on hot-blast furnace top need not to use the finished product galvanic couple, has saved the cost effectively, has improved the productivity effect of enterprise. The method has the characteristics of simple installation method, convenient maintenance, good sealing performance and low spare part cost, and can be popularized and applied to installation of blast furnace ironmaking hot blast stove top temperature measuring thermocouples in the whole metallurgical industry, installation of other similar high-temperature high-pressure combustion furnace thermocouples and the like.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot blast stove top temperature thermocouple installation device is used for being installed in a thermocouple installation hole used for hot blast stove top temperature measurement, and is characterized in that the hot blast stove top temperature thermocouple installation device comprises:

2. The hot blast stove top temperature thermocouple mounting device according to claim 1, wherein the thermocouple mounting hole is a thermocouple mounting hole used for original hot blast stove top temperature measurement or a temperature thermocouple mounting hole newly formed at a hot blast stove top temperature measurement position.

3. The hot blast stove top temperature thermocouple mounting device according to claim 2, wherein said thermocouple mounting hole is of a truncated cone shape which is narrower towards the inside of the stove and wider towards the outside of the stove metal shell.

4. The hot blast stove top temperature thermocouple installation device according to claim 3, wherein the filler (10) is damping mud.

5. The hot blast stove top temperature thermocouple mounting device according to claim 4, wherein the length of the thermocouple wire (13) is 1250mm, and the length of the insulating support tube (12) is 1000 mm; the thermocouple wire anode (131) and the thermocouple wire cathode (132) respectively penetrate through the two thermocouple wire outlet holes (61) in the center of the first high-temperature asbestos plate (6).

6. The hot blast stove top temperature thermocouple mounting arrangement according to claim 5, wherein said thermocouple wire positive (131) and thermocouple wire negative (132) extend in two opposite directions between said first (6) and second (7) high temperature asbestos sheets, respectively.

7. The hot blast stove top temperature thermocouple installation device according to claim 6, characterized in that the protection tube (11) is a corundum protection tube of length 1000mm Φ 15 x 20.

8. The hot blast stove top temperature thermocouple installation device according to claim 7, wherein the single flange (4), the first high temperature asbestos plate (6), the second high temperature asbestos plate (7) and the blind flange (5) are fixedly connected through flange fastening bolts (8) and flange fastening nuts (9).