A device for on-line maintenance of external circulation system failure of blast furnace water slag vertical mill

Abstract

The application discloses a kind of for blast furnace water slag vertical mill outer circulation system fault on-line maintenance device, comprising: first switching valve, setting on conveying pipeline, the first switching valve is used to switch after making the conveying pipeline with blast furnace water slag vertical mill outer circulation material pipeline or bypass intercommunication, the outer circulation material pipeline is connected with chain conveyer, the bypass is communicated with waste yard;Negative pressure stabilizing unit is used to make the negative pressure in blast furnace water slag vertical mill stable;Control terminal is used to forcibly modify or shield the operation signal of chain conveyer;Field control unit is used for the field operation state control and switching of chain conveyer.The application can timely on-line maintenance or rush repair, and maintenance is simple and convenient, maintenance time is short, equipment operation efficiency is improved by more than 10%, and provides strong support for enterprise cost reduction and efficiency improvement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace water slag vertical mill, and particularly relates to an online maintenance device for a blast furnace water slag vertical mill external circulation system fault. BACKGROUND

[0002] At present, the control of the blast furnace water slag vertical mill is generally highly automatic central interlocking start or stop, and a control instruction is sent to a DCS through a central control terminal, the DCS is disconnected or closed through an electrical control cabinet main contactor after receiving the operation instruction, and the opening or stop of all field devices in the DCS control is interlocked and protected by corresponding programs, so the conventional maintenance method is as follows: when a chain conveyor has a fault and must be stopped for processing, the device must be stopped in sequence, that is, the feeding system, the vertical mill main motor, the hot blast furnace system and the external circulation system, so that the device can be maintained or repaired. After the maintenance is completed, the devices are started again in sequence. The conventional maintenance method seriously restricts the continuity of production. SUMMARY

[0003] Therefore, it is necessary to provide an online maintenance device for a blast furnace water slag vertical mill external circulation system fault in view of the above technical problems.

[0004] An online maintenance device for a blast furnace water slag vertical mill external circulation system fault, comprising:

[0005] A first switching valve is arranged on a conveying pipeline, and the first switching valve is used to switch the conveying pipeline to be connected to an external circulation material pipeline of the blast furnace water slag vertical mill or a bypass, the external circulation material pipeline is connected to a chain conveyor, and the bypass is connected to a waste yard;

[0006] A negative pressure stabilizing unit is used to stabilize the negative pressure in the blast furnace water slag vertical mill;

[0007] A control terminal is used to forcibly modify or shield an operation signal of the chain conveyor;

[0008] A field control unit is used to control and switch the field operation state of the chain conveyor;

[0009] When the blast furnace water slag vertical mill external circulation system has a fault, the first switching valve is switched to the bypass, the external circulation material is discharged to the waste yard, the negative pressure stabilizing unit stabilizes the negative pressure in the blast furnace water slag vertical mill, then the control terminal modifies the operation signal of the chain conveyor into a forced operation signal, after completion, the low-speed operation signal of the chain conveyor is shielded, and finally the field control unit switches the chain conveyor to the field mode and stops in the field.

[0010] In one of the embodiments, the first switch valve comprises a pneumatic two-way valve, a first outlet of the pneumatic two-way valve is connected with the bypass, a second outlet of the pneumatic two-way valve is connected with an inlet of the electromagnetic separator, a first outlet of the electromagnetic separator is connected with the bypass, and a second outlet of the electromagnetic separator is connected with the chain conveyor.

[0011] In one of the embodiments, the negative pressure stabilizing unit comprises a heavy hammer flap valve, which can be closed to ensure the stability of the negative pressure in the blast furnace slag vertical mill.

[0012] In one of the embodiments, the control terminal comprises:

[0013] a central control terminal;

[0014] a distributed control system connected with the central control terminal, and the distributed control system can modify the running signal of the chain conveyor into a forced running signal.

[0015] In one of the embodiments, the field control unit comprises a low-voltage electrical room, which is used to switch the chain conveyor to a field mode or a remote control mode.

[0016] The above device for online maintenance of the blast furnace slag vertical mill external circulation system failure can discharge the external circulation material to the waste field through the first switch valve, then modify or shield the running signal of the chain conveyor by the control terminal, and finally stop the chain conveyor in the field for maintenance, so that the device can timely perform online maintenance or repair, the maintenance is simple and convenient, the maintenance time is short, the equipment operation efficiency is improved by more than 10%, and the device provides strong support for enterprises to reduce costs and increase benefits. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a structural schematic diagram of the device for online maintenance of the blast furnace slag vertical mill external circulation system failure of the present application. DETAILED DESCRIPTION

[0019] For the purpose of promoting an understanding of the application, the application will now be described in greater detail with reference to the figures. The preferred embodiments of the application are illustrated in the figures. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0020] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it should be noted that when an element is referred to as being "connected", it can be directly connected to other element or intervening elements can also be present.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] Referring to Figure 1 An embodiment of the present application provides a device for on-line maintenance of a fault of an external circulation system of a blast furnace slag vertical mill, comprising:

[0023] A first switching valve 1 is arranged on a conveying pipeline, and the first switching valve 1 is used to switch the conveying pipeline to be communicated with an external circulation material pipeline 2 of the blast furnace slag vertical mill or a bypass 3. The external circulation material pipeline 2 is connected with a chain conveyor 4, and the bypass 3 is communicated with a waste yard 5.

[0024] A negative pressure stabilizing unit 6 is used to stabilize the negative pressure in the blast furnace slag vertical mill.

[0025] A control terminal 7 is used to forcibly modify or shield a running signal of the chain conveyor 4.

[0026] A field control unit is used to control and switch a field running state of the chain conveyor 4.

[0027] When the external circulation system of the blast furnace slag vertical mill has a fault, the first switching valve 1 is switched to the bypass 3, the material of external circulation is discharged to the waste yard 5, the negative pressure stabilizing unit 6 stabilizes the negative pressure in the blast furnace slag vertical mill, then the control terminal 7 modifies the running signal of the chain conveyor 4 into a forced running signal, after completion, the low-speed running signal of the chain conveyor 4 is shielded, finally, the field control unit switches the chain conveyor 4 to a field mode and then stops in the field. The present application can timely perform on-line maintenance or repair, and the maintenance is simple and convenient, the maintenance time is short, the equipment running efficiency is improved by more than 10%, and strong support is provided for enterprises to reduce cost and increase benefit.

[0028] In an embodiment of the present application, the first switch valve 1 comprises a pneumatic two-way valve, a first outlet of the pneumatic two-way valve is connected with the bypass 3, a second outlet of the pneumatic two-way valve is connected with an inlet of the electromagnetic separator 8, a first outlet of the electromagnetic separator 8 is connected with the bypass 3, and a second outlet of the electromagnetic separator 8 is connected with the chain conveyor 4.

[0029] In the embodiment, the pneumatic two-way valve can switch the external circulation material pipeline 2 and the bypass 3 by a pneumatic way, so that the material can be normally fed through the external circulation material pipeline 2 or delivered to the waste field 5 through the bypass 3. The main function of the electromagnetic separator 8 is to remove the iron pieces and other magnetic substances in the material, so as to ensure the safe operation of the chain conveyor 4.

[0030] In an embodiment of the present application, the negative pressure stabilizing unit 6 comprises a heavy hammer flap valve, which can be closed to ensure the stability of the negative pressure in the blast furnace slag vertical mill. In other embodiments of the present application, the negative pressure stabilizing unit 6 can also be other valves or devices.

[0031] In an embodiment of the present application, the control terminal 7 comprises:

[0032] a central control terminal 71;

[0033] a decentralized control system 72 connected with the central control terminal 71, and the decentralized control system 72 can modify the running signal of the chain conveyor 4 into a forced running signal.

[0034] In the embodiment, the central control terminal 71 can modify the running signal of the chain conveyor 4 in the decentralized control system 72, so that the decentralized control system 72 still has a running signal in the case of power failure of the chain conveyor 4, thereby avoiding the chain tripping of the chain conveyor 4.

[0035] In an embodiment of the present application, the on-site control unit comprises a low-voltage electrical room, which is used to switch the chain conveyor 4 to an on-site mode or a remote control mode.

[0036] The working process of the present application is as follows:

[0037] Firstly, the pneumatic two-way valve is switched to the bypass 3, and the externally circulated material is discharged to the waste field 5; secondly, the heavy hammer flap valve is closed to ensure the stability of the negative pressure in the mill; after the above operations are completed, the central control terminal 71 is used to modify the equipment running signal of the chain conveyor 4 into a forced running signal; after the modification is completed, the low-speed running signal of the equipment is shielded, and finally the low-voltage electrical room is used to switch the equipment to an on-site mode and stop on site. In this way, on-site shutdown and repair of the equipment can be carried out.

[0038] Through the central control terminal 71, the running signal of the decentralized control system 72 of the equipment is modified, so that the decentralized control system 72 still has a running signal in the case of power failure of the equipment, thereby avoiding the interlocked tripping of the equipment. After the completion of the maintenance, the decentralized control system 72 is only started on site, then switched to the remote control mode, then the forced signal of the decentralized control system 72 is cancelled, and finally, the pneumatic two-way valve is switched to the positive way and the heavy hammer flap valve is opened.

[0039] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0040] The above-described embodiments only express several implementation manners of the present application, and cannot be interpreted as a limitation on the patent scope of the present application. It should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An online fault diagnosis and repair device for the external circulation system of a blast furnace slag vertical mill, characterized in that, include: The first switching valve is installed on the conveying pipeline. The first switching valve is used to switch the conveying pipeline to connect with the external circulating material pipeline or bypass of the blast furnace slag vertical mill. The external circulating material pipeline is connected to the chain conveyor, and the bypass is connected to the waste yard. The negative pressure stabilization unit is used to stabilize the negative pressure inside the blast furnace slag vertical mill. A control terminal is used to forcibly modify or block the operating signals of the chain conveyor; The field control unit is used for controlling and switching the field operating status of the chain conveyor; When the external circulation system of the blast furnace slag vertical mill malfunctions, the first switching valve switches to bypass, the externally circulated material is discharged to the waste yard, the negative pressure stabilization unit stabilizes the negative pressure inside the blast furnace slag vertical mill, then the control terminal modifies the running signal of the chain conveyor to a forced running signal, after which the low-speed running signal of the chain conveyor is blocked, and finally, the field control unit switches the chain conveyor to field mode and stops it on-site.

2. The online fault diagnosis and repair device for the external circulation system of a blast furnace slag vertical mill as described in claim 1, characterized in that, The first switching valve includes a pneumatic two-way valve. The first outlet of the pneumatic two-way valve is connected to a bypass, the second outlet of the pneumatic two-way valve is connected to the inlet of an electromagnetic separator, the first outlet of the electromagnetic separator is connected to the bypass, and the second outlet of the electromagnetic separator is connected to the chain conveyor.

3. The online fault diagnosis and repair device for the external circulation system of a blast furnace slag vertical mill as described in claim 2, characterized in that, The negative pressure stabilization unit includes a counterweight flap valve, which can be closed to ensure the stability of the negative pressure inside the blast furnace slag vertical mill.

4. The online fault diagnosis and repair device for the external circulation system of a blast furnace slag vertical mill as described in claim 3, characterized in that, The control terminal includes: Central control terminal; A distributed control system is connected to the central control terminal, and the distributed control system is capable of modifying the running signal of the chain conveyor into a forced running signal.

5. The online fault diagnosis and repair device for the external circulation system of a blast furnace slag vertical mill as described in claim 1, characterized in that, The field control unit includes a low-voltage electrical room, which is used to switch the chain conveyor to field mode or remote control mode.

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