Slag bath liquid level measuring device

Abstract

The utility model relates to a slag bath liquid level measuring device which is characterized in that a suspension frame is fixedly arranged on the side wall of a slag bath, a liquid level cylinder is arranged on the suspension frame, a floating ball is arranged in the liquid level cylinder, N trigger switches are arranged on the liquid level cylinder close to the side of the suspension frame in the height direction, and N is a natural number larger than or equal to 2; each trigger switch reflects a liquid level height, a trigger rod is arranged corresponding to each trigger switch, a reset spring is sleeved on each trigger rod, and the trigger switches are electrically connected with a main controller.

Description

Technical Field

[0001] This utility model belongs to the field of safety maintenance technology for blast furnace slag flushing pools, and particularly relates to a slag pool liquid level measuring device. Background Technology

[0002] In the blast furnace production process, the blast furnace slag flushing pool, as a crucial auxiliary facility, plays a vital role in ensuring the normal and continuous operation of the blast furnace. In recent years, with the continuous optimization of the industrial structure and the improvement of the level of intelligence, our plant has specifically equipped the three slag pools with pressure detection-based level gauges in the newly built second-phase project. The working principle of this type of level gauge is to detect the liquid pressure and convert the pressure into an electrical signal, thereby indirectly obtaining the liquid level information.

[0003] However, in actual production operations, we discovered a series of significant problems with this pressure-based level gauge. First, when the water in the slag pool becomes turbid due to slag mixing, the liquid's density and viscosity change significantly, directly affecting the accuracy of the pressure signal and leading to increased deviations in the level display. Second, as the production process progresses, the water temperature in the slag pool continuously rises, which not only exacerbates the turbidity of the liquid but may also damage the level gauge's sensor, further reducing its measurement accuracy and reliability.

[0004] More seriously, the level gauges are prone to damage and require frequent repairs and replacements, which not only increases maintenance costs but also severely affects the continuity and stability of blast furnace production. Furthermore, in winter, due to heavy fog, video monitoring systems often struggle to capture the slag pool level in a timely and clear manner, causing significant inconvenience and safety hazards to production operations.

[0005] In summary, existing pressure-based level gauges used in blast furnace slag flushing pits suffer from significant problems, including low measurement accuracy, susceptibility to damage, and difficulties in monitoring during winter. Therefore, there is an urgent need to develop a new and reliable slag flushing pit level measurement device to overcome these shortcomings and ensure the normal and continuous operation of blast furnace production. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model provides a slag pool liquid level measuring device to overcome the above-mentioned defects and ensure the normal and continuous operation of blast furnace production.

[0007] This utility model is implemented as follows: a liquid level measuring device for a slag pool, characterized in that: a suspension frame is fixedly installed on the side wall of the slag pool, a liquid level cylinder is installed on the suspension frame, a float is provided inside the liquid level cylinder, and N trigger switches are provided along the height direction on the liquid level cylinder near the suspension frame, where N is a natural number ≥ 2; each trigger switch reflects a liquid level height, and a trigger rod is provided corresponding to each trigger switch, and a reset spring is fitted on the trigger rod. The trigger switches are electrically connected to the main controller.

[0008] More preferably, a flow stabilizer is installed at the lower end of the liquid level cylinder.

[0009] More preferably, the flow stabilizer is connected to the lower end of the liquid level cylinder via a flange.

[0010] Preferably, the trigger lever is provided with a protective sleeve.

[0011] The advantages and technical effects of this utility model are as follows: Compared with the prior art, the liquid level measuring device for slag ponds provided by this utility model has significant technical advantages. First, by using a suspension frame fixedly installed on the side wall of the slag pond, the liquid level cylinder can be stably suspended, avoiding the impact and corrosion that might occur if placed directly in the slag pond, thus greatly improving the stability and durability of the device. Second, the float ball installed inside the liquid level cylinder can float up and down with changes in the liquid level, directly and intuitively reflecting the actual height of the liquid level in the slag pond. This design simplifies the measurement process and reduces costs and failure rates.

[0012] Furthermore, by using multiple trigger switches arranged along the height direction on the level tank, this invention achieves precise segmented measurement of the liquid level. Each trigger switch corresponds to a specific liquid level. When the float rises to the trigger position, the trigger switch activates and sends a signal to the main controller. This segmented measurement method is more reliable than continuous measurement and is easier to implement and calibrate. Simultaneously, the combined design of the trigger rod and return spring ensures that the trigger switch automatically resets after activation, preparing for the next measurement and avoiding measurement errors caused by mechanical jamming. Finally, through electrical connection to the main controller, this invention achieves intelligent monitoring and management of the liquid level. The main controller can receive and process the trigger switch activation signals in real time, determine the current liquid level, and take corresponding control measures. This intelligent design not only improves the accuracy and efficiency of measurement but also provides strong support for the continuity and stability of blast furnace production. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0014] 1. Suspension bracket; 2. Liquid level cylinder; 2-1; Flow stabilizer; 3. Float; 4. Trigger switch; 5. Trigger rod; 6. Return spring; 7. Flange; 8. Sheath. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0016] Please see Figure 1 A liquid level measuring device for a slag pit includes a suspension bracket 1 fixedly installed on the side wall of the slag pit. A liquid level cylinder 2 is mounted on the suspension bracket. The design of the suspension bracket allows the liquid level cylinder to be stably suspended from the side wall of the slag pit, avoiding the impact and corrosion that might occur if the liquid level cylinder were directly placed in the slag pit, thus improving the stability and durability of the device. Simultaneously, the installation position of the suspension bracket can be adjusted according to actual needs, facilitating adaptation to slag pits of different sizes. A float 3 is installed inside the liquid level cylinder, which floats up and down with changes in the liquid level, directly reflecting the actual height of the liquid level in the slag pit. This design is simple and intuitive, requiring no complex sensors or conversion devices, reducing costs and failure rates. Near the suspension bracket, N trigger switches 4 are installed along the height direction on the liquid level cylinder, where N is a natural number ≥ 2. Each trigger switch reflects a liquid level height. By setting multiple trigger switches at different heights, precise segmented measurement of the liquid level height can be achieved. In this embodiment, four trigger switches are set, representing four liquid levels: high, higher, lower, and low. Each trigger switch corresponds to a specific liquid level. When the float rises to the trigger position, the trigger switch activates and sends a signal to the main controller. This method is more reliable than continuous measurement and is easier to implement and calibrate. Each trigger switch has a trigger rod 5, on which a return spring 6 is mounted. The combined design of the trigger rod and return spring allows the trigger switch to automatically reset after activation, ready for the next measurement. The return spring ensures that the trigger rod quickly returns to its initial position when the float descends or exceeds the specified liquid level, avoiding measurement errors caused by mechanical jamming. The trigger switches are electrically connected to the main controller. Through this electrical connection, the trigger switch's activation signal can be transmitted to the main controller in real time for processing and display. The main controller can determine the current liquid level based on the received signal and take corresponding control measures, such as alarms and automatic water level adjustment, achieving intelligent monitoring and management of the liquid level.

[0017] The trigger switch works as follows: When the liquid level rises to a specific height, the float will also rise to that height. During its ascent, the float will contact the trigger rod at the corresponding height, pushing the rod to overcome the resistance of the return spring. This movement of the trigger rod will activate the connected trigger switch, changing it from a non-triggered state to a triggered state. Once activated, the trigger switch sends an electrical signal to the main controller via a wire, indicating that the liquid level has reached the height corresponding to that trigger switch.

[0018] The main controller works by receiving electrical signals from various trigger switches and determining the current liquid level based on these signals. The main controller may have pre-set height values ​​corresponding to each trigger switch; when it receives a signal from a particular trigger switch, it can determine the liquid level at that height. The main controller can also perform more precise estimations or predictions of the liquid level height based on the trend of liquid level changes (such as rising or falling) and the trigger sequence of the switches. Finally, the main controller can display the liquid level information or transmit it to other control systems (such as alarm systems) via a communication interface for further processing or control.

[0019] Preferably, a flow stabilizer 2-1 is installed at the lower end of the level cylinder 2. The flow stabilizer design reduces the impact and disturbance of water flow in the slag pool on the level cylinder, allowing the float to float more stably on the liquid surface, thereby improving the accuracy and stability of the measurement. At the same time, the flow stabilizer also prevents debris from entering the level cylinder, protecting the float and trigger switch from damage.

[0020] Preferably, the flow stabilizer is connected to the lower end of the level tank via flange 7. The flange connection facilitates the installation and removal of the flow stabilizer, as well as maintenance and replacement.

[0021] Preferably, the trigger rod is provided with a protective sleeve 8. The sleeve is designed to protect the trigger rod from external environmental corrosion and damage, extending its service life.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring the liquid level in a slag pool, characterized in that: A suspension frame is fixedly installed on the side wall of the slag pool. A liquid level cylinder is installed on the suspension frame, and a float is installed inside the liquid level cylinder. N trigger switches are installed along the height direction on the liquid level cylinder near the suspension frame, where N is a natural number ≥ 2. Each trigger switch responds to a liquid level height. A trigger rod is provided for each trigger switch, and a reset spring is fitted on the trigger rod. The trigger switches are electrically connected to the main controller.

2. The slag pool liquid level measuring device according to claim 1, characterized in that: A flow stabilizer is installed at the lower end of the liquid level cylinder.

3. The slag pool liquid level measuring device according to claim 2, characterized in that: The flow stabilizer is connected to the lower end of the liquid level cylinder via a flange.

4. The slag pool liquid level measuring device according to claim 1, characterized in that: The trigger rod is covered with a protective sleeve.

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