Blast furnace blowpipe dismounting device

Abstract

The utility model discloses a blast furnace blowpipe disassembling and assembling device which comprises a hydraulic unloading forklift and further comprises a frame body, a base, a main supporting plate and a front baffle. Bases are symmetrically arranged on a load-carrying forklift area of the hydraulic unloading forklift in a striding mode in pairs. The frame body is mounted on the base; a main supporting plate is arranged at the rear end of the top surface of the frame body; a front baffle is arranged at the front end of the top surface of the frame body; the two ends of the blowpipe to be installed abut against the main supporting plate and the front baffle respectively. The device is simple in structure and convenient to operate, position adjustment is in place at a time, installation personnel and labor intensity can be reduced, safety is guaranteed, maintenance time is shortened, and maintenance work efficiency is improved. The maintenance quality is improved. Time and labor are saved, and the technical problem that a small blast-furnace tuyere platform is small in space or a large blast-furnace tuyere platform cannot be operated by a mechanical vehicle after being repaired for a long time when the blast-furnace blowpipe is disassembled and assembled is thoroughly solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace production, in particular to a blast furnace blowpipe dismounting device. BACKGROUND

[0002] The blowpipe is the last device of the blast furnace air inlet system, the end of the blowpipe is connected with the tuyere small sleeve, and air is sent into the furnace. The blowpipe itself is not easy to be damaged, but the tuyere small sleeve connected with the blowpipe is a vulnerable part in the blast furnace system, and often needs to be replaced due to damage and air leakage. When the tuyere small sleeve and the tuyere large sleeve are replaced, the blowpipe must be removed first to operate.

[0003] Large blast furnaces have spacious tuyere platforms, and professional mechanical vehicles can be used for operation. However, the tuyere platforms of small blast furnaces are small in area and cross operation is required when the tuyere small sleeve is replaced, so professional mechanical vehicles cannot be used. The blowpipe of these blast furnaces can only be dismounted by manual operation.

[0004] At present, the blowpipe replacement operation on the small blast furnace is as follows: the blowpipe is manually dismounted and mounted by cooperation of an electric hoist and a manual chain block. When the blowpipe is dismounted, the transmission chain of the hand hoist is hung at a higher position first, then the front end of the blowpipe is hooked, the rear end of the blowpipe is lifted by the electric hoist, all the blowpipe fixing bolts are cut off by gas cutting, and then the blowpipe is slowly dismounted in cooperation of the front end and the rear end. When the blowpipe is mounted, the above-mentioned operation is performed in reverse.

[0005] When the electric hoist and the rear end of the blowpipe are not on the same vertical line, the blowpipe is easy to run backward during hoisting, and the front end needs to be pulled by the hanging chain block. The two must be accurately matched, and experienced personnel need to operate, otherwise the blowpipe often cannot be mounted in place and air leakage occurs, which affects the safety of the blast furnace air supply system, the operation speed is slow, and the precision is low. It is laborious to manually pull the chain block at the front end, and multiple people are needed to complete the operation. Moreover, the personnel need to stand at a position close to the furnace skin on the upper part of the tuyere to operate, the temperature is high, there is no professional maintenance platform, and it is not safe. After the blowpipe is pulled into place, multiple people need to cooperate to use a wrench, a sleeve and a sledgehammer to tighten the bolts one by one, which is laborious and time-consuming. About 6-8 people are needed to replace one blowpipe, and it takes about 2 hours, which seriously affects the efficiency of blast furnace maintenance.

[0006] The information disclosed in the background section is only intended to increase the understanding of the general background of the present application and should not be considered as admitting or implying in any form that the information constitutes prior art that is known to those of ordinary skill in the art. CONTENT OF THE PRESENT INVENTION

[0007] The application provides a blast furnace blowpipe dismounting device, which can quickly complete the replacement of the blowpipe, improves the installation precision of the blowpipe, avoids the wind running phenomenon, reduces the installation personnel and labor intensity, ensures safety, shortens the maintenance time and improves the maintenance work efficiency.

[0008] The application provides a blast furnace blowpipe dismounting device, which comprises a hydraulic unloading forklift, and further comprises a frame body, a base, a main support plate and a front baffle.

[0009] The main support plate is arranged on the rear end of the top surface of the frame body, and the front baffle is arranged on the front end of the top surface of the frame body.

[0010] The two ends of the blowpipe to be installed are respectively abutted on the main support plate and the front baffle.

[0011] Preferably, the top surface of the main support plate is provided with a support arc surface, and the contact length of the support arc surface with the blowpipe to be installed is at least 40-50% of the contact section circumference of the blowpipe to be installed.

[0012] Preferably, the top surface of the front baffle is provided with a support arc surface, and the contact length of the support arc surface with the blowpipe to be installed is at least 30-40% of the contact section circumference of the blowpipe to be installed.

[0013] Preferably, the front baffle is hingedly connected with the front end of the frame body.

[0014] Preferably, the device comprises a limiting cylinder, a moving cylinder and a limiting rod, the moving cylinder is arranged on the side wall of the front baffle, and the limiting cylinder is arranged on the top surface of the front end of the frame body.

[0015] When the blowpipe is loaded, the through hole of the limiting cylinder and the through hole of the moving cylinder are arranged in alignment, and the limiting rod is inserted into the through hole of the limiting cylinder and the through hole of the moving cylinder.

[0016] Preferably, the device comprises a limiting plate, the limiting plate is arranged on the lower part of the front baffle, and the limiting plate is arranged in extension to the base.

[0017] Preferably, the device comprises a plurality of supporting legs, and the frame body is arranged on the base through the supporting legs.

[0018] Preferably, the device comprises a hinged rod, the two ends of the hinged rod are respectively hingedly connected with the front end of the frame body, and the front baffle is welded to the middle part of the hinged rod.

[0019] The application can produce the beneficial effects including:

[0020] 1) The blast furnace blowing tube dismantling and assembly device provided in this application is simple in structure, easy to operate, and allows for one-time adjustment to the correct position. It reduces the number of installation personnel and labor intensity, ensures safety, shortens maintenance time, and improves maintenance efficiency and quality. It saves time and effort, completely solving the technical problem of limited space on small blast furnace tuyeres or the inability to use mechanical vehicles for operations on large blast furnace tuyeres due to disrepair.

[0021] 2) The blast furnace blowpipe disassembly and assembly device provided in this application can be easily disassembled and assembled by only 2 to 3 people, reducing the labor intensity of employees and improving work efficiency; it can avoid safety accidents caused by the inconvenience of multiple people operating, and reduce the accident rate. Attached Figure Description

[0022] Fig. 1 A front view schematic diagram of the blast furnace blowpipe assembly / disassembly device in use in at least one embodiment of this application;

[0023] Fig. 2 A front view schematic diagram of the blast furnace blowpipe assembly / disassembly device in an idle state, provided in at least one embodiment of this application;

[0024] Fig. 3 A schematic diagram of the blast furnace blowpipe assembly / disassembly device in use in at least one embodiment of this application;

[0025] Fig. 4 A schematic diagram of the main support plate in at least one embodiment provided in this application;

[0026] Fig. 5 for Fig. 2 A magnified view of point A;

[0027] Legend:

[0028] Handle 1, push rod 11, vehicle body hydraulic drive assembly 14, hydraulic unloading forklift lever 141, load-bearing wheel 13, guide wheel 12, frame 312, base 31, outrigger 315, main support plate 32, front baffle 321, support arc surface 331, limit plate 323, hinge rod 324, limit rod 322, operating lever 333, limit cylinder 34, moving cylinder 341, blowpipe 2. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.

[0031] The technical means not described in detail in the present application and not used to solve the technical problems of the present application are set according to common knowledge in the art, and various common knowledge setting methods can be implemented.

[0032] Referring to Figs. 1-5 The high blast pipe dismounting device provided by the present application is improved on the basis of the existing commercially available hydraulic unloading fork truck. The base used is a hydraulic unloading fork truck, for example, a Diancha brand unloading fork truck. The fork truck has the function of lifting and lowering the cargo carrying area by hydraulic drive. This function is a self-provided function of the purchased fork truck. The specific structure and use method are operated according to the instruction manual of the purchased fork truck.

[0033] The device comprises: a base 31 arranged on the load carrying fork truck area of the hydraulic unloading fork truck; the base 31 is symmetrically arranged at the front and rear ends of the load carrying fork truck area; a supporting leg 315 is arranged on the base 31; a rack body 312 is arranged on the top surface of the supporting leg 315; each top corner of the supporting leg 315 and the rack body 312 is connected; a front baffle 321 is hingedly arranged on the front end of the rack body 312; the front baffle 321 is arranged vertically to the rack body 312 in use; a supporting arc surface 331 is arranged on the top surface of the front baffle 321, and one end of the blast pipe 2 to be installed is abutted on the supporting arc surface 331. In order to ensure the reliable support force of the front baffle 321, the bottom end of the front baffle 321 is hingedly connected to the rack body 312, a limiting cylinder 34 is arranged on the top surface of the front end of the rack body 312, a moving cylinder 341 is arranged on the side surface of the front baffle 321 facing the rack body 312, when the front baffle 321 is perpendicular to the rack body 312, the moving cylinder 341 is abutted on the top surface of the rack body 312 and aligned with the limiting cylinder 34, after the two are concentric, a limiting rod 322 is inserted into the moving cylinder 341 and the limiting cylinder 34 to fix the position of the front baffle 321 relative to the rack body 312, so as to ensure reliable support. A main supporting plate 32 is arranged close to the vehicle body of the hydraulic unloading fork truck, and a supporting arc surface 331 is arranged on the top thereof, and the other end of the blast pipe 2 is abutted on the supporting arc surface 331.

[0034] After the feeding is completed, the limiting rod 322 is extracted, the front baffle 321 is rotated around the hinge shaft, and the top surface area of the rack body 312 is left, so as to prevent the front baffle 321 from being damaged.

[0035] The device can provide reliable supporting force for the blowpipe 2 to be installed, and when the blowpipe 2 moves to the installation area, the hydraulic unloading forklift can be operated to lift the blowpipe 2 for installation, thereby reducing the number of operators and improving the operation efficiency.

[0036] In an embodiment, the limiting plate 323 is arranged at the lower middle part of the front baffle 321 and extends to the base 31. When the front baffle 321 is rotated around the hinge shaft after the feeding is completed, the extended end of the front baffle 32 abuts on the base 31, thereby limiting the front baffle 321 and preventing the extended end of the front baffle 321 from being damaged due to excessive rotation angle. The length of the limiting plate 323 can be adjusted according to actual needs or according to the angle between the front baffle 321 and the top surface of the frame 312.

[0037] In an embodiment, the frame 312 includes a rectangular frame, and each top corner of the bottom surface of the rectangular frame is provided with a supporting leg 315. The two ends of the base 31 are respectively connected to the hydraulic unloading forklift rods 141 symmetrically arranged on the two sides of the vehicle body, and the base 31 is arranged on the hydraulic unloading forklift rods 141.

[0038] In an embodiment, the contact length of the supporting arc surface 331 on the main supporting plate 32 with the blowpipe 2 to be installed is at least 40-50% of the contact cross-sectional circumference of the blowpipe 2 to be installed, so as to ensure the reliable abutting of the blowpipe 2 on the device.

[0039] In an embodiment, the contact length of the supporting arc surface 331 on the front baffle 321 with the blowpipe 2 to be installed is at least 30-40% of the contact cross-sectional circumference of the blowpipe 2 to be installed, so as to ensure the reliable abutting of the blowpipe 2 on the device.

[0040] In an embodiment, the hinge rod 324 is inserted into the hinge hole at the front end of the frame 312, and the front baffle 321 is welded to the middle part of the hinge rod 324.

[0041] In an embodiment, the operating rod 333 is arranged on one end of the limiting rod 322, so as to facilitate the insertion and extraction operation.

[0042] In an embodiment, the through hole of the moving cylinder 341 is arranged in parallel with the front baffle 321, and the through hole of the limiting cylinder 34 is arranged in parallel with the short side of the frame 312.

[0043] In a specific embodiment, the unloading fork truck comprises: a vehicle body, a load fork truck area, a handle 1, a push rod 11, a vehicle body hydraulic drive assembly 14; the vehicle body hydraulic drive assembly 14 is arranged in the vehicle body; the vehicle body hydraulic drive assembly 14 is drivingly connected with the push rod 11; the load fork truck area is drivingly connected with the vehicle body hydraulic drive assembly 14; an operator operates the push rod 11 to drive the vehicle body hydraulic drive assembly 14 to lift or lower the load fork truck area.

[0044] In a specific embodiment, the load fork truck area comprises: a pair of hydraulic unloading fork truck rods 141, a plurality of load bearing wheels 13; the hydraulic unloading fork truck rods 141 are arranged in pairs on the outer side of the vehicle body and extend outwardly perpendicularly to the vehicle body; the load bearing wheels 13 are symmetrically arranged on the hydraulic unloading fork truck rods 141 and support the hydraulic unloading fork truck rods 141.

[0045] In a specific embodiment, the hydraulic unloading fork truck rod 141 used is a steel wheel with a wheel diameter of 25 mm and a wheel width of 40 mm, so as to ensure the load bearing reliability during pushing.

[0046] In a specific embodiment, the unloading fork truck comprises: a guide wheel 12; the guide wheel 12 is arranged on the bottom surface of the vehicle body and is used to determine the moving direction in cooperation with the push rod 11.

[0047] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blast furnace lance dismounting device, comprising: The hydraulic unloading fork truck is characterized in that it further comprises a frame body (312), a base (31), a main support plate (32), and a front baffle (321); the base (31) is symmetrically arranged on the load fork truck area of the hydraulic unloading fork truck; the frame body (312) is installed on the base (31); The main support plate (32) is arranged on the rear end of the top surface of the frame body (312); and the front baffle (321) is arranged on the front end of the top surface of the frame body (312); The two ends of the to-be-installed blowpipe (2) are respectively abutted on the main support plate (32) and the front baffle (321).

2. The apparatus according to claim 1, wherein The top surface of the main support plate (32) is provided with a support arc surface (331); the contact length of the support arc surface (331) with the to-be-installed blowpipe (2) is at least 40-50% of the contact cross-sectional circumference of the to-be-installed blowpipe (2).

3. The apparatus according to claim 1, wherein The top surface of the front baffle (321) is provided with a support arc surface (331); the contact length of the support arc surface (331) with the to-be-installed blowpipe (2) is at least 30-40% of the contact cross-sectional circumference of the to-be-installed blowpipe (2).

4. The apparatus according to claim 1, wherein The front end of the front baffle (321) is hingedly connected with the frame body (312).

5. The apparatus according to claim 4, wherein The hydraulic unloading fork truck further comprises: A limiting cylinder (34), a moving cylinder (341), and a limiting rod (322); the moving cylinder (341) is arranged on the side wall of the front baffle (321); and the limiting cylinder (34) is arranged on the top surface of the front end of the frame body (312); When the blowpipe (2) is loaded, the through hole of the limiting cylinder (34) and the through hole of the moving cylinder (341) are arranged in alignment, and the limiting rod (322) is inserted into the through hole of the limiting cylinder (34) and the through hole of the moving cylinder (341).

6. The apparatus according to claim 5, wherein The hydraulic unloading fork truck further comprises: A limiting plate (323); the limiting plate (323) is arranged on the lower part of the front baffle (321); The limiting plate (323) is arranged to extend towards the base (31).

7. The apparatus according to claim 4, wherein The hydraulic unloading fork truck further comprises: A plurality of supporting legs (315); the frame body (312) is arranged on the base (31) through the supporting legs (315).

8. The apparatus according to claim 7, wherein The hydraulic unloading fork truck further comprises: A hinged rod (324); the two ends of the hinged rod (324) are respectively hingedly connected with the front end of the frame body (312); and the front baffle (321) is welded on the middle part of the hinged rod (324).

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