Safety protection device for stokehole hydraulic station of blast furnace
By setting up relays, photoelectric switches and emergency stop switches in the current circuit of the hydraulic station in front of the blast furnace, multi-path control of the open mud gun equipment unit is achieved, which solves the problem that operators find it difficult to accurately judge the safety of the furnace work, and significantly improves the operational safety and stability.
Patent Information
- Application Number
- CN202421846616.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-01
AI Technical Summary
Under the harsh conditions of the blast furnace environment, it is difficult for operators to accurately determine whether the pre-heavy work of loading mud and replacing rods is safe, which may lead to mismanagement of the equipment and cause serious injury or death.
A safety protection device for hydraulic stations in front of blast furnaces was designed. By setting a relay and photoelectric switch in the current circuit and connecting an emergency stop switch in parallel, multi-path control of the opening mud gun equipment unit is realized to ensure that the furnace work can be shut down in time to avoid danger.
It effectively avoids misoperation in the equipment operation room, ensures the safety of furnace work, reduces the risk of accidents, and improves the stability and safety of operations through the dual insurance mechanism.
Smart Images
Figure CN222948391U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ironmaking high-speed iron furnace front equipment, in particular to a safety protection device for a blast furnace front hydraulic station. Background Art
[0002] There are two major equipments in front of the blast furnace, namely the tapping machine and the hydraulic mud gun. The tapping machine is used to open the iron mouth, and the hydraulic mud gun is used to block the iron mouth. With the development of ironmaking technology, the iron mouth of blast furnaces tends to develop in the direction of deeper depth, harder gun mud and greater heat. In order to adapt to this development, the tapping machine and hydraulic mud gun in front of the furnace widely adopt independent hydraulic power systems and equipment operation rooms. The equipment operation room controls the operation of the tapping machine and the hydraulic mud gun. But specifically, before the equipment operation room controls the tapping machine to open, the drill rod and drill bit must be installed; when the drill bit is worn and cannot drill during the opening process, the tapping machine must be controlled to be retracted in the equipment operation room, and a new drill bit must be replaced before the opening; when the hydraulic mud gun is used to block the mouth after the slag iron is completely discharged, the gun must be retracted in the equipment operation room after 10 minutes. After the gun is retracted, the mud loader puts the gun mud from the mud loading hole into the gun barrel, and then the gunner presses the mud handle in the equipment operation room to press the mud. In other words, the work of the tapping machine and the hydraulic mud gun is completed by the operator in the equipment operation room and the furnace workers who load mud and change rods.
[0003] Due to the limited space in the iron-making yard, the equipment and equipment operating room of the tapping machine and hydraulic mud cannon are respectively set on both sides of the iron ditch. The environment in front of the blast furnace is harsh, with huge dust, smoke and noise. In addition, there is an iron hook in the middle. It is difficult for the operator to see the situation on the opposite side with naked eyes in the equipment operating room, and it is impossible to accurately judge whether the furnace workers who are loading mud and changing rods have safely evacuated from the work platform. Once the judgment is wrong, the operator in the equipment operating room will mistakenly operate the equipment, which will cause serious harm to the furnace workers who are loading mud and changing rods, and even cause death. In order to prevent the above accidents, alarm bells are often installed on site. When the equipment operating room controls the start-up of the tapping machine and hydraulic mud cannon, the alarm bell is turned on to remind the furnace workers who are loading mud and changing rods to retreat to a safe position. However, this method is also a one-way control from the equipment operating room. The furnace workers are the main body of the accident, but they are always out of control, resulting in frequent accidents. Utility Model Content
[0004] The utility model aims to provide a safety protection device for a hydraulic station in front of a blast furnace.
[0005] The technical solution to achieve the purpose of the utility model is: a safety protection device for a hydraulic station in front of a blast furnace, comprising an iron ditch, an equipment operating room, and an opening mud gun equipment unit consisting of an opening machine and a hydraulic mud gun, wherein the equipment operating room and the opening mud gun equipment unit are respectively located on both sides of the iron ditch, and the side of the iron ditch where the opening mud gun equipment unit is provided is the opening mud gun side, the opening mud gun equipment unit is connected to a hydraulic station and powered by the hydraulic station, a control power supply is provided in the equipment operating room, and the control power supply is connected to the hydraulic station and used to provide control power to the hydraulic station;
[0006] The open mud cannon side is provided with a furnace worker entrance and exit passage through which the furnace worker passes when operating the open mud cannon equipment unit. The furnace worker entrance and exit passage is located on the side of the open mud cannon equipment unit. A photoelectric switch P is installed on the furnace worker entrance and exit passage. The open mud cannon side is also provided with an emergency stop switch SB. The emergency stop switch SB and the open mud cannon equipment unit are respectively located on both sides of the furnace worker entrance and exit passage. The photoelectric switch P and the emergency stop switch SB are connected in parallel to form a double switch parallel branch. A relay KA is provided with a normally closed contact KA-1 and a normally open contact KA-2. The normally closed contact KA-1 is provided on the line connecting the control power supply and the hydraulic station. An indicator light L is provided in the equipment operating room. The normally open contact KA-2 is connected in series with the indicator light L and then connected in parallel with the double switch parallel branch to form a parallel unit. The parallel unit and the relay KA are connected in series in the same current loop.
[0007] Furthermore, the current loop is provided with voltage by a 24V power supply, which not only meets the power supply requirements of the current loop, but also has high safety.
[0008] The utility model discloses a safety protection device for a hydraulic station in front of a blast furnace, by arranging the relay KA having a normally closed contact KA-1 in the current loop, and arranging the normally closed contact KA-1 on the line connecting the control power supply and the hydraulic station, so that after controlling the energization of the relay KA in the current loop, the control of the hydraulic station and the open mud gun equipment unit can be realized, that is, the open mud gun equipment unit can not only perform operations including start and stop in the equipment operating room, but also can be started and stopped by the current loop control, and the open mud gun equipment unit has more control paths, especially the emergency stop switch SB of the current loop is located on the open mud gun side, the conduction of the current loop and the energization of the relay KA are close to the open mud gun equipment unit, and can be controlled by the furnace front worker who operates the open mud gun equipment unit. Once an accident occurs, the furnace front worker who is the main subject of the accident has the control path of the current loop and also has the control of the start and stop of the open mud gun equipment unit. The initiative of the furnace worker, combined with the operation of the furnace worker, can start and stop the open mud gun equipment unit in time. For example, when the furnace worker enters the area where the open mud gun equipment unit is located and operates the open mud gun equipment unit, he can first press the emergency stop switch SB to close the emergency stop switch SB, the relay KA is energized, the normally closed contact KA-1 is disconnected, the open mud gun equipment unit is shut down, and the control of the control power supply in the equipment operation room is lost; after the furnace worker completes the operation and evacuates the area where the open mud gun equipment unit is located, he can open the emergency stop switch SB, the relay KA loses power, the normally closed contact KA-1 is closed, the open mud gun equipment unit is restored, and the control of the control power supply in the equipment operation room is realized. In this way, after the furnace worker enters the area where the open mud gun equipment unit is located, the equipment operation room will lose control of the control power supply, thereby avoiding misoperation in the equipment operation room and causing harm to the furnace worker who has not evacuated in time, thereby greatly ensuring the safety of operation.
[0009] The utility model provides a safety protection device for the hydraulic station in front of a blast furnace. In addition to the emergency stop switch SB, the photoelectric switch P is also installed on the furnace worker entrance and exit passage. The photoelectric switch P and the emergency stop switch SB are arranged in parallel. The photoelectric switch P is controlled by the furnace worker passing through the furnace worker entrance and exit passage. Once a furnace worker passes through the furnace worker entrance and exit passage, the photoelectric switch P is automatically closed, the current loop is turned on, and the opening mud gun equipment unit is shut down. Under the parallel setting of the photoelectric switch P and the emergency stop switch SB, the conduction of the current loop and the shutdown of the open mud cannon equipment unit are controlled by the photoelectric switch P and the emergency stop switch SB, forming a double insurance. At the same time, since the photoelectric switch P is inductively controlled by the furnace worker in the furnace worker entrance and exit channel, compared with the manual control of the emergency stop switch SB, its triggering timeliness and stability are better, and there is no situation of "forgetting to press the switch", and no matter whether the emergency stop switch SB is closed or not, as long as a furnace worker passes through the furnace worker entrance and exit channel, the photoelectric switch P will automatically close. In particular, when the furnace worker enters the area where the open mud cannon equipment unit is located and operates the open mud cannon equipment unit, even if the furnace worker forgets to close the emergency stop switch SB, after the furnace worker passes through the furnace worker entrance and exit channel, the photoelectric switch P will automatically close after sensing it, causing the open mud cannon equipment unit to shut down, which provides a strong backing for the safe operation of the open mud cannon equipment unit.
[0010] In addition, in the utility model of the safety protection device for the hydraulic station in front of the blast furnace, the relay KA is also provided with a normally open contact KA-2. After the normally open contact KA-2 is connected in series with the indicator light L, it is connected in parallel with the double switch parallel branch. The normally open contact KA-2 connected in parallel with the double switch parallel branch is also controlled by the photoelectric switch P and the emergency stop switch SB. If any switch of the photoelectric switch P and the emergency stop switch SB is closed, the relay KA is energized, and the normally open contact KA-2 is also closed. After the normally open contact KA-2 is closed, the indicator light L is lit; on the contrary, the photoelectric switch P and the emergency stop switch SB are both disconnected, the relay KA loses power, and the normally open contact KA-2 is also disconnected. After the normally open contact KA-2 is disconnected, the indicator light L is turned off. The indicator light L is arranged in the equipment operation room. Through the on and off of the indicator light L, it is convenient for the operators in the equipment operation room to understand the relevant operations, and to carry out collaborative operations that facilitate production, so that production is smoother. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the structure and function of the safety protection device of the hydraulic station in front of the blast furnace of the utility model;
[0012] Figure 2It is a partial circuit diagram of a safety protection device of a hydraulic station in front of a blast furnace of the utility model. DETAILED DESCRIPTION
[0013] The following is a detailed description of the preferred embodiment of the safety protection device for the hydraulic station in front of the blast furnace of the utility model in conjunction with the accompanying drawings:
[0014] like Figure 1 and Figure 2 As shown, a safety protection device for a hydraulic station in front of a blast furnace comprises an iron ditch 101, an equipment operating room 102, and an opening mud cannon equipment unit 103 composed of an opening machine 1031 and a hydraulic mud cannon 1032, wherein the equipment operating room 102 and the opening mud cannon equipment unit 103 are respectively located on both sides of the iron ditch 101, and a side of the iron ditch 101 on which the opening mud cannon equipment unit 103 is provided is an opening mud cannon side 1011, the opening mud cannon equipment unit 103 is connected to a hydraulic station 104 and powered by the hydraulic station 104, a control power supply 105 is provided in the equipment operating room 102, and the control power supply 105 is connected to the hydraulic station 104 and used to provide control power to the hydraulic station 104;
[0015] The open mud cannon side 1011 is provided with a furnace worker entrance and exit passage 1 through which the furnace worker passes when operating the open mud cannon equipment unit 103. The furnace worker entrance and exit passage 1 is located on the side of the open mud cannon equipment unit 103. A photoelectric switch P is installed on the furnace worker entrance and exit passage 1. The open mud cannon side 1011 is also provided with an emergency stop switch SB. The emergency stop switch SB and the open mud cannon equipment unit 103 are respectively located on both sides of the furnace worker entrance and exit passage 1. The photoelectric switch P and the emergency stop switch The switches SB are connected in parallel to form a dual-switch parallel branch 21, and a relay KA is provided with a normally closed contact KA-1 and a normally open contact KA-2. The normally closed contact KA-1 is provided on the line connecting the control power supply 105 and the hydraulic station 104. An indicator light L is provided in the equipment operating room 102. The normally open contact KA-2 is connected in series with the indicator light L and then connected in parallel with the dual-switch parallel branch 21 to form a parallel unit 22. The parallel unit 22 and the relay KA are connected in series in the same current loop 3.
[0016] The utility model discloses a safety protection device for a hydraulic station in front of a blast furnace. The iron ditch 101 is an important facility in front of the blast furnace and is used for iron tapping in the blast furnace. The opening mud cannon equipment unit 103 is composed of the opening machine 1031 and the hydraulic mud cannon 1032. In the opening mud cannon equipment unit 103, the opening machine 1031 is used to open the iron mouth, and the hydraulic mud cannon 1032 is used to drive out the mud cannon and seal the iron mouth. The opening mud cannon equipment unit 103 is equipped with the hydraulic station 104, which is powered by the hydraulic station 104. The control power supply 105 for controlling the hydraulic station 104 is arranged in the equipment operation room 102. By operating the control power supply 105 in the equipment operation room 102, the hydraulic station 104 can be controlled, and then the operation of the opening mud cannon equipment unit 103 can be controlled.
[0017] In the utility model, the safety protection device of the hydraulic station in front of a blast furnace, the working process of the opening mud cannon equipment unit 103 is completed by the operation in the equipment operation room 102 and the furnace workers in front of the furnace. The furnace workers' entrance and exit passage 1 set on the opening mud cannon side 1011 is located on the way back and forth when the furnace workers go to operate the opening mud cannon equipment unit 103. When operating the opening mud cannon equipment unit 103 and evacuating from the area where the opening mud cannon equipment unit 103 is located, the furnace workers need to pass through the furnace workers' entrance and exit passage 1. The photoelectric switch P installed on the furnace workers' entrance and exit passage 1 is used to detect whether there are furnace workers passing through the furnace workers' entrance and exit passage 1. It is controlled by the furnace workers passing through. When the furnace workers pass through the furnace workers' entrance and exit passage 1, the photoelectric switch P is closed. The open mud cannon side 1011 is also provided with the emergency stop switch SB, and the emergency stop switch SB is also controlled by the furnace worker. When entering the area where the open mud cannon equipment unit 103 is located and operating the open mud cannon equipment unit 103, the furnace worker can press the emergency stop switch SB; or when the furnace worker has not completely evacuated from the area where the open mud cannon equipment unit 103 is located, and the open mud cannon equipment unit 103 is easy to start externally, the emergency stop switch SB can be pressed to shut down the open mud cannon equipment unit 103.
[0018] In the utility model, the safety protection device for the hydraulic station in front of the blast furnace is provided. The photoelectric switch P and the emergency stop switch SB are connected in parallel to form a double switch parallel branch 21. In the double switch parallel branch 21, after any switch of the photoelectric switch P and the emergency stop switch SB is closed, the current loop 3 is turned on and the relay KA is energized. After the relay KA is energized, the normally closed contact KA-1 is disconnected, the line connecting the control power supply 105 and the hydraulic station 104 is disconnected, the control power supply 105 loses control of the hydraulic station 104, and the opening mud gun equipment unit 103 is shut down; the normally open contact KA-2 is closed, the indicator light L is energized and lights up, and the lit indicator light L plays the role of information transmission, providing relevant signals to the operator in the equipment operation room 102.
[0019] The utility model provides a safety protection device for a hydraulic station in front of a blast furnace, by arranging the relay KA with a normally closed contact KA-1 in the current loop 3, and arranging the normally closed contact KA-1 on the line connecting the control power supply 105 and the hydraulic station 104, so that after controlling the power supply of the relay KA in the current loop 3, the control of the hydraulic station 104 and the opening mud gun equipment unit 103 can be realized, that is, the opening mud gun equipment unit 103 can not only perform operations including start and stop in the equipment operation room 102, The start and stop can also be controlled by the current loop 3. The open mud gun equipment unit 103 has more control paths, especially the emergency stop switch SB of the current loop 3 is located on the open mud gun side 1011, the conduction of the current loop 3 and the energization of the relay KA are close to the open mud gun equipment unit 103, which can be controlled by the furnace front worker who operates the open mud gun equipment unit 103. Once an accident occurs, the furnace front worker who is the main body of the accident has the control path of the current loop 3 and also has the control of the start and stop control of the open mud gun equipment unit 103. The furnace worker has the initiative, combined with the operation of the furnace worker, and can start and stop the open mud gun equipment unit 103 in time. For example, when the furnace worker enters the area where the open mud gun equipment unit 103 is located and operates the open mud gun equipment unit 103, he can first press the emergency stop switch SB to close the emergency stop switch SB, the relay KA is energized, the normally closed contact KA-1 is disconnected, the open mud gun equipment unit 103 is shut down, and the control of the control power supply 105 in the equipment operation room 102 is lost; after the furnace worker completes the operation, he evacuates the open mud gun equipment When the open mud gun equipment unit 103 is located in the area where the open mud gun equipment unit 103 is located, the emergency stop switch SB can be opened, the relay KA loses power, the normally closed contact KA-1 is closed, and the open mud gun equipment unit 103 is restored. The control of the control power supply 105 in the equipment operation room 102 is realized. In this way, after the furnace worker enters the area where the open mud gun equipment unit 103 is located, the equipment operation room 102 will lose control of the control power supply 105, thereby avoiding misoperation in the equipment operation room 102, which may cause harm to the furnace worker who fails to evacuate in time, and greatly ensure the safety of operation.
[0020] The utility model provides a safety protection device for the hydraulic station in front of a blast furnace. In addition to the emergency stop switch SB, the photoelectric switch P is also installed on the furnace worker entrance and exit passage 1. The photoelectric switch P and the emergency stop switch SB are arranged in parallel. The photoelectric switch P is controlled by the furnace worker passing through the furnace worker entrance and exit passage 1. Once a furnace worker passes through the furnace worker entrance and exit passage 1, the photoelectric switch P is automatically closed, the current loop 3 is turned on, and the opening mud gun equipment unit 103 is shut down. Under the parallel setting of the photoelectric switch P and the emergency stop switch SB, the conduction of the current loop 3 and the shutdown of the open mud cannon equipment unit 103 are controlled by the photoelectric switch P and the emergency stop switch SB, forming a double insurance. At the same time, since the photoelectric switch P is inductively controlled by the furnace worker in the furnace worker access channel 1, compared with the manual control of the emergency stop switch SB, its triggering timeliness and stability are better, and there is no situation of "forgetting to press the switch", and no matter whether the emergency stop switch SB is closed or not, as long as a furnace worker passes through the furnace worker access channel 1, the photoelectric switch P will automatically close. In particular, when the furnace worker enters the area where the open mud cannon equipment unit 103 is located and operates the open mud cannon equipment unit 103, even if the furnace worker forgets to close the emergency stop switch SB, after the furnace worker passes through the furnace worker access channel 1, the photoelectric switch P will automatically close after sensing it, so that the open mud cannon equipment unit 103 will be shut down, which provides a strong backing for the safe operation of the open mud cannon equipment unit 103.
[0021] In addition, in the utility model of the safety protection device for the hydraulic station in front of the blast furnace, the relay KA is also provided with a normally open contact KA-2. After the normally open contact KA-2 is connected in series with the indicator light L, it is connected in parallel with the double switch parallel branch 21. The normally open contact KA-2 connected in parallel with the double switch parallel branch 21 is also controlled by the photoelectric switch P and the emergency stop switch SB. If any switch of the photoelectric switch P and the emergency stop switch SB is closed, the relay KA is energized, and the normally open contact KA-2 is also closed. After the normally open contact KA-2 is closed, the indicator light L is lit; on the contrary, the photoelectric switch P and the emergency stop switch SB are both disconnected, the relay KA loses power, and the normally open contact KA-2 is also disconnected. After the normally open contact KA-2 is disconnected, the indicator light L is turned off. The indicator light L is arranged in the equipment operation room 102. Through the on and off of the indicator light L, it is convenient for the operators in the equipment operation room 102 to understand the relevant operations, and to carry out collaborative operations that facilitate production, so that production is smoother and accidents are avoided.
[0022] In the utility model blast furnace front hydraulic station safety protection device, preferably, the current loop 3 is provided with voltage by a 24V power supply. The 24V power supply not only meets the power supply demand of the current loop 3, but also has high safety.
[0023] The utility model of the safety protection device for the hydraulic station in front of the blast furnace, the photoelectric switch P, the emergency stop switch SB and the indicator light L are all existing structures, and the utility model will not elaborate on this.
[0024] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.
Claims
1. A safety protection device for a hydraulic station in front of a blast furnace, comprising an iron ditch, an equipment operating room, and an opening mud gun equipment unit consisting of an opening machine and a hydraulic mud gun, wherein the equipment operating room and the opening mud gun equipment unit are respectively located on both sides of the iron ditch, and the side of the iron ditch where the opening mud gun equipment unit is provided is an opening mud gun side, the opening mud gun equipment unit is connected to a hydraulic station and powered by the hydraulic station, a control power supply is provided in the equipment operating room, the control power supply is connected to the hydraulic station and used to provide control power to the hydraulic station; characterized in that: The open mud cannon side is provided with a furnace worker entrance and exit passage through which the furnace worker passes when operating the open mud cannon equipment unit. The furnace worker entrance and exit passage is located on the side of the open mud cannon equipment unit. A photoelectric switch P is installed on the furnace worker entrance and exit passage. The open mud cannon side is also provided with an emergency stop switch SB. The emergency stop switch SB and the open mud cannon equipment unit are respectively located on both sides of the furnace worker entrance and exit passage. The photoelectric switch P and the emergency stop switch SB are connected in parallel to form a double switch parallel branch. A relay KA is provided with a normally closed contact KA-1 and a normally open contact KA-2. The normally closed contact KA-1 is provided on the line connecting the control power supply and the hydraulic station. An indicator light L is provided in the equipment operating room. The normally open contact KA-2 is connected in series with the indicator light L and then connected in parallel with the double switch parallel branch to form a parallel unit. The parallel unit and the relay KA are connected in series in the same current loop.
2. The safety protection device for the hydraulic station in front of a blast furnace according to claim 1 is characterized in that: The current loop is provided with voltage by a 24V power supply.