Double-tube composite oxygen lance

Abstract

The utility model relates to the technical field of blast furnace ironmaking oxygen lances, and discloses a double-tube composite oxygen lance, which comprises a lance body and a nozzle, the lance body consists of a thick tube and a thin tube, according to the double-tube composite oxygen lance, when a valve is not closed, oxygen can still pass through the thin tube through a clamping component, and the nozzle is not closed. According to the double-pipe combined type oxygen lance, the thin pipe is inserted into the thick pipe, and grouting is conducted between the thin pipe and the thick pipe, so that the service life of the lance body can be effectively prolonged, and the service life of the lance body is prolonged. The spiral block is fixed on the surface of the thick pipe, so that the gun body can be changed from being hit into an iron notch in the prior art to entering in a rotating mode, damage to a mud drum in the oxygen gun burying process is effectively overcome, the requirement for operating skills of workers can be effectively lowered, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace iron-making oxygen lances, in particular to a double-tube composite oxygen lance. Background Art

[0002] During the ironmaking process of a blast furnace, after a long-term maintenance, the temperature of the slag in the furnace will drop significantly. It is crucial to heat the furnace as soon as possible in the early stage of air supply and resumption of production. In order to melt and discharge the slag in the furnace as soon as possible, the method we currently use is to directly extend the oxygen lance into the iron mouth to heat the furnace.

[0003] When the oxygen gun is in use, the nozzle of the oxygen gun needs to be maintained and inspected frequently. However, when the nozzle is maintained and disassembled, it is necessary to ensure that the oxygen gun is closed and disconnected from the oxygen supply source to avoid accidental injury. However, it is very likely that the staff will forget to close the valve due to negligence, resulting in an accident. For this reason, we propose a double-tube composite oxygen gun. Utility Model Content

[0004] The utility model aims to provide a double-tube composite oxygen lance to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a double-tube composite oxygen gun, including a gun body and a nozzle, the gun body is composed of a thick tube and a thin tube, the gun body is directly controlled by a control system computer, the gun body is remotely controlled by electric control, the pressure, flow, etc. are displayed by the computer, and the valve can be remotely controlled, and a positioning component for limiting the nozzle is arranged inside the gun body, and the positioning component includes:

[0006] A fixing plate, wherein the fixing plate is fixed on the inner wall of the capillary;

[0007] A piston block, the piston block is connected to the capillary piston, the piston block is penetrated by a connecting rod, and the left side of the connecting rod is fixed to the right side of the fixing plate;

[0008] A stopper is fixed on the right side of the connecting rod, a spring piece 1 is fixed on the left side of the piston block, and an end of the spring piece 1 away from the piston block is fixed on the right side of the fixing plate;

[0009] A cross bar, the right side of which is fixed to the left side of the piston block;

[0010] A locking piece is arranged on the left side of the cross bar. When the valve is not closed, oxygen impacts the piston block to make the piston block move to the left, so that the stopper no longer blocks the through hole on the piston block, so that oxygen can pass through and be ejected through the nozzle.

[0011] Preferably, a through hole is provided at the center of the piston block to allow oxygen to pass through.

[0012] Preferably, the locking member includes a horizontal plate, which is fixed to the left side of the horizontal bar, and a bracket one is hinged on the left side of the horizontal plate, and a bracket two is hinged on the end of the bracket one away from the horizontal plate, and an end of the bracket two away from the bracket one is hinged to the right side of the contact plate, and a spring piece two is fixed on the right side of the contact plate, and an end of the spring piece two away from the contact plate is fixed to the left side of the horizontal plate. When the horizontal bar moves to the left with the locking member, the bracket one and the bracket two can be controlled to arch.

[0013] Preferably, the nozzle is threadedly connected to the gun body, and a resistance ring is fixed on the inner side of the nozzle. When the cross bar moves to the left with the locking member, the resistance plate can resist the resistance ring.

[0014] Preferably, an annular latch is provided on the inner side of the nozzle. When bracket one and bracket two are arched, the hinged position of bracket one and bracket two can interfere with the annular latch on the inner side of the nozzle. Even if the annular latch on the inner side of the nozzle cannot engage with the hinged position of bracket one and bracket two at this time, as the nozzle is rotated and disassembled a little bit, the hinged position of bracket one and bracket two can be stuck in the annular latch on the inner side of the nozzle, so that the nozzle cannot continue to rotate, thereby preventing the staff from disassembling the nozzle when the valve is not closed.

[0015] Preferably, the thin tube is inserted into the thick tube, and grouting is performed between the thin tube and the thick tube, which can effectively improve the service life of the gun body and prevent it from being burned by slag iron. A spiral block is fixed on the surface of the thick tube, which can change the gun body from the original punching into the iron mouth to rotating entry, effectively overcoming the damage to the mud bag during the oxygen lance embedding process.

[0016] Compared with the prior art, the utility model provides a double-tube composite oxygen lance, which has the following beneficial effects:

[0017] 1. The double-tube composite oxygen gun has a locking assembly. When the valve is not closed, oxygen can still pass through the capillary tube. At this time, the first and second brackets can be stuck in the annular teeth on the inner side of the nozzle, so that the nozzle cannot rotate, thereby preventing the staff from disassembling the nozzle when the valve is not closed.

[0018] 2. The double-tube composite oxygen lance can effectively improve the service life of the lance body and prevent it from being burned by slag iron by inserting a thin tube into a thick tube and grouting between the thin tube and the thick tube. The spiral block fixed on the surface of the thick tube can change the lance body from the original iron mouth to the rotation entry, effectively overcoming the damage to the mud bag during the process of burying the oxygen lance, effectively reducing the operating skill requirements of the staff and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the front view of the cross-section of the gun body of the utility model;

[0021] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure;

[0022] Figure 4 It is a schematic diagram of the annular clamping tooth structure on the inner side of the nozzle of the utility model.

[0023] In the figure: 1. gun body; 101. thick tube; 102. thin tube; 2. nozzle; 3. positioning assembly; 31. fixing plate; 32. piston block; 33. connecting rod; 34. stopper; 35. spring piece 1; 36. cross bar; 37. locking piece; 371. cross plate; 372. bracket 1; 373. bracket 2; 374. resistance plate; 375. spring piece 2; 4. resistance ring; 5. spiral block. DETAILED DESCRIPTION

[0024] like Figure 1-4 As shown, the utility model provides a technical solution: a double-tube composite oxygen gun, including a gun body 1 and a nozzle 2, the gun body 1 is composed of a thick tube 101 and a thin tube 102, the gun body 1 is directly controlled by a control system computer, and the gun body 1 is remotely controlled by electric control, and the pressure, flow, etc. are displayed by the computer, and the valve can be remotely controlled, and a positioning assembly 3 for limiting the nozzle 2 is arranged inside the gun body 1, and the positioning assembly 3 includes: a fixing plate 31, a piston block 32, a connecting rod 33, a stopper 34, a spring 35, a cross bar 36 and a locking member 37.

[0025] The fixing plate 31 is fixed on the inner wall of the capillary 102, the piston block 32 is connected to the piston of the capillary 102, the piston block 32 is penetrated by the connecting rod 33, the left side of the connecting rod 33 is fixed to the right side of the fixing plate 31, a stopper 34 is fixed to the right side of the connecting rod 33, a spring piece 35 is fixed to the left side of the piston block 32, the end of the spring piece 35 away from the piston block 32 is fixed to the right side of the fixing plate 31, the right side of the cross bar 36 is fixed to the left side of the piston block 32, and a locking piece 37 is provided on the left side of the cross bar 36. When the valve is not closed, oxygen can be sprayed out through the gun body 1 and the nozzle 2. When the oxygen is in the capillary 102, the oxygen impacts the piston block 32 to move the piston block 32 to the left, so that the stopper 34 no longer blocks the through hole on the piston block 32, so that the oxygen can pass through and be sprayed out through the nozzle 2.

[0026] A through hole is formed in the center of the piston block 32 to allow oxygen to pass through.

[0027] The locking member 37 includes a transverse plate 371, which is fixed to the left side of the transverse bar 36. A bracket 1 372 is hinged on the left side of the transverse plate 371. A bracket 2 373 is hinged on the end of the bracket 1 372 away from the transverse plate 371. An end of the bracket 2 373 away from the bracket 1 372 is hinged on the right side of a resistance plate 374. A spring piece 2 375 is fixed to the right side of the resistance plate 374. An end of the spring piece 2 375 away from the resistance plate 374 is fixed to the left side of the transverse plate 371. When the transverse bar 36 moves to the left with the locking member 37, the resistance plate 374 can resist the nozzle 2, so that the resistance plate 374 and the transverse plate 371 squeeze the bracket 1 372 and the bracket 2 373, so that the bracket 1 372 and the bracket 2 373 are arched.

[0028] The nozzle 2 is threadedly connected to the gun body 1 , and a resistance ring 4 is fixed to the inner side of the nozzle 2 . When the cross bar 36 moves to the left with the locking member 37 , the resistance plate 374 can resist against the resistance ring 4 .

[0029] An annular latching tooth is provided on the inner side of the nozzle 2. When the contact plate 374 and the cross plate 371 squeeze the bracket 1 372 and the bracket 2 373 so that the bracket 1 372 and the bracket 2 373 are arched, the hinged position of the bracket 1 372 and the bracket 2 373 can come into conflict with the annular latching tooth on the inner side of the nozzle 2. Even if the annular latching tooth on the inner side of the nozzle 2 cannot be engaged with the hinged position of the bracket 1 372 and the bracket 2 373 at this time, as the nozzle 2 is rotated and disassembled a little bit, the hinged position of the bracket 1 372 and the bracket 2 373 can be stuck in the annular latching tooth on the inner side of the nozzle 2, so that the nozzle 2 cannot continue to rotate, thereby preventing the staff from disassembling the nozzle 2 when the valve is not closed.

[0030] The thin tube 102 is inserted into the thick tube 101, and grouting is performed between the thin tube 102 and the thick tube 101, which can effectively improve the service life of the gun body 1 and prevent it from being burned by slag iron. A spiral block 5 is fixed on the surface of the thick tube 101, which can change the gun body 1 from the original iron mouth entering into the rotating entry, effectively overcoming the damage to the mud bag during the oxygen lance burial process, and can effectively reduce the operating skill requirements of the staff and improve efficiency.

[0031] Based on the above embodiment, during actual use of the gun body 1, the gun body 1 is rotated into the thick tube 101 by the spiral block 5 provided on the surface of the thick tube 101, and the valve is opened by remote control of the control system computer to spray oxygen.

[0032] When the nozzle 2 needs to be inspected and maintained, in order to prevent the staff from directly disassembling the nozzle 2 and forgetting to close the valve, when the staff directly disassembles the nozzle 2, since there is still oxygen passing through the capillary 102, the oxygen impacts the piston block 32, causing the piston block 32 to move to the left. The piston block 32, together with the cross bar 36 and the locking piece 37, is now in the state of moving to the left.

[0033] At this time, the resistance plate 374 is in a state of resistance against the resistance ring 4, and the bracket 1 372 and the bracket 2 373 are arched. When the staff slightly rotates the nozzle 2, the hinged position of the bracket 1 372 and the bracket 2 373 is stuck in the annular teeth on the inner side of the nozzle 2, so that the nozzle 2 cannot continue to rotate, thereby preventing the staff from disassembling the nozzle 2 when the valve is not closed.

[0034] When the staff closes the valve through the control system computer, oxygen no longer passes through the capillary 102, and the piston block 32 moves to the right under the action of the spring piece 1 35, and the piston block 32 moves to the right with the cross bar 36 and the locking piece 37. Under the action of the spring piece 2 375, the bracket 1 372 and the bracket 2 373 are reset and no longer engage with the annular teeth on the inner side of the nozzle 2. The staff can disassemble the nozzle 2 for maintenance.

[0035] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A double-tube composite oxygen lance, comprising a lance body (1) and a nozzle (2), characterized in that: The gun body (1) is composed of a thick tube (101) and a thin tube (102). A positioning assembly (3) for limiting the position of the nozzle (2) is arranged inside the gun body (1). The positioning assembly (3) comprises: A fixing plate (31), wherein the fixing plate (31) is fixed on the inner wall of the capillary (102); A piston block (32), the piston block (32) being connected to the capillary (102) piston, the piston block (32) being penetrated by a connecting rod (33), the left side of the connecting rod (33) being fixed to the right side of the fixing plate (31); A stopper (34), the right side of the connecting rod (33) is fixed with a stopper (34), the left side of the piston block (32) is fixed with a spring piece 1 (35), and one end of the spring piece 1 (35) away from the piston block (32) is fixed to the right side of the fixing plate (31); A cross bar (36), the right side of which is fixed to the left side of the piston block (32); A locking member (37), wherein the left side of the cross bar (36) is provided with a locking member (37).

2. A double-tube composite oxygen lance according to claim 1, characterized in that: A through hole is provided at the center of the piston block (32).

3. A double-tube composite oxygen lance according to claim 1, characterized in that: The locking member (37) comprises a transverse plate (371), the transverse plate (371) being fixed on the left side of the transverse rod (36), a bracket 1 (372) being hinged on the left side of the transverse plate (371), a bracket 2 (373) being hinged on one end of the bracket 1 (372) away from the transverse plate (371), a bracket 2 (373) being hinged on the right side of a contact plate (374), a spring sheet 2 (375) being fixed on the right side of the contact plate (374), a spring sheet 2 (375) being fixed on one end of the spring sheet 2 (375) away from the contact plate (374) being fixed on the left side of the transverse plate (371).

4. A double-tube composite oxygen lance according to claim 1, characterized in that: The nozzle (2) is threadedly connected to the gun body (1), and a resistance ring (4) is fixed on the inner side of the nozzle (2).

5. A double-tube composite oxygen lance according to claim 1, characterized in that: The inner side of the nozzle (2) is provided with an annular latching tooth.

6. A double-tube composite oxygen lance according to claim 1, characterized in that: The thin tube (102) is inserted into the thick tube (101), grouting is performed between the thin tube (102) and the thick tube (101), and a spiral block (5) is fixed on the surface of the thick tube (101).

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