Water seal system of walking beam furnace

Abstract

The utility model discloses a walking beam furnace water seal system which solves the technical problems that in the prior art, a liquid level meter in a water seal tank is prone to breaking down, whether the liquid level of the water seal tank is normal or not cannot be accurately verified when the liquid level meter breaks down, and production is prone to being troubled. Each group of water seal tanks in the walking beam furnace water seal system performs independent drainage through the independent overflow pipes, and the height of the water inlet ends of the overflow pipes is the normal working water level of the water seal tanks. Whether the water level in the water seal tank can meet the normal work of the walking beam heating furnace water seal system can be judged by simply observing whether water flows out of the drainage end of the overflow pipe or not, the independent overflow pipe is of a simple mechanical structure, the cost and the failure rate are low, and the walking beam heating furnace water seal system is more suitable for steel production.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steel rolling equipment, and particularly relates to a water sealing system of a walking beam furnace. BACKGROUND

[0002] The water sealing groove of the walking beam furnace is located at the position of the walking beam furnace bottom, plays an important role in sealing the movable column and the opening of the furnace bottom to prevent air from leaking into the furnace to cause the fluctuation of the negative pressure in the furnace, and if the liquid level in the water sealing groove is too low, the external cold wind will enter the furnace through the furnace bottom opening to change the pressure in the furnace, affect the combustion atmosphere and the normal heating process, cause the uneven heating of the slab, increase the burning loss, and exceed the emission standard of pollutants, and also cause the reduction of the yield of the slab.

[0003] At present, the common walking beam furnace is equipped with four movable beams, and the number of the matched water sealing grooves is four groups.

[0004] The water sealing groove is provided with a water supplement pipeline and an overflow and drainage pipeline, the water supplement pipeline and the overflow and drainage pipeline are used for ensuring that the water sealing groove is kept at the normal working water level, and the water that exceeds the normal working water level is discharged to the drainage ditch along the overflow and drainage pipeline.

[0005] In the prior art, the liquid level in the water sealing groove is monitored by a liquid level meter, and the overflow and drainage pipelines of all the water sealing grooves are discharged to the ground drainage ditch through a pipeline, as shown in FIG. Figure 1 However, the failure rate of the liquid level meter is high, and if the liquid level meter in the water sealing groove fails, there is no other means to verify whether the liquid level in the water sealing groove is normal (the normal working water level), which causes trouble to the production. Therefore, it is an urgent technical problem for those skilled in the art to invent a water sealing system that can accurately determine whether the water level in the water sealing groove reaches the normal working water level. SUMMARY

[0006] To solve the above technical problems, the application provides a water sealing system of a walking beam furnace to solve the technical problem that the liquid level meter in the water sealing groove is prone to failure in the prior art, and it is difficult to accurately verify whether the liquid level in the water sealing groove is normal when the failure occurs, which is prone to cause trouble to the production.

[0007] The technical scheme adopted to achieve the purpose of the application is as follows:

[0008] The water sealing system of the walking beam furnace comprises:

[0009] The water sealing groove is used for containing water to seal the furnace cavity in cooperation with the skirt seal of the furnace bottom, and the number of the water sealing grooves is equal to the number of the movable beams in the walking beam furnace.

[0010] Overflow pipes for discharging water exceeding the normal working water level of the water seal tank, the number of the overflow pipes is equal to the number of the water seal tanks, and the water inlet ends of all the overflow pipes are in one-to-one correspondence with the water seal tanks, the height of the water inlet end of the overflow pipe is the normal working water level of the water seal tank, and the water outlet end of the overflow pipe extends to the drain ditch; wherein when the water outlet end of the overflow pipe has water flowing out, the water level in the water seal tank can meet the normal working of the step-by-step heating furnace water seal system.

[0011] In order to better realize the present application, further optimization is made in the above structure, and a pipeline photoelectric liquid level sensor is arranged at the end of the overflow pipe away from the water seal tank.

[0012] In order to better realize the present application, further optimization is made in the above structure, and the step-by-step heating furnace water seal system further comprises a drain pipeline, the water inlet end of the drain pipeline is in communication with the water seal tank, and the water outlet end of the drain pipeline extends to the drain ditch.

[0013] In order to better realize the present application, further optimization is made in the above structure, and the drain pipeline comprises a drain main pipeline and a drain branch pipeline.

[0014] The number of the drain branch pipelines matches the number of the water seal tanks, and the water inlet end of the drain branch pipeline is in communication with the water seal tank.

[0015] The water outlet end of the drain main pipeline extends to the drain ditch, and the water inlet end of the drain main pipeline is in communication with the water outlet end of all the drain branch pipelines.

[0016] In order to better realize the present application, further optimization is made in the above structure, and the water inlet end of the drain branch pipeline is provided with a drain valve for opening and closing the drain branch pipeline.

[0017] In order to better realize the present application, further optimization is made in the above structure, and the step-by-step heating furnace water seal system further comprises a water replenishing device for replenishing water into the water seal tank, and the water outlet end of the water replenishing device is in communication with the water seal tank.

[0018] In order to better realize the present application, further optimization is made in the above structure, and the water replenishing device comprises a water replenishing pump and a water replenishing pipeline.

[0019] The water inlet end of the water replenishing pump is in communication with a water source, and the water outlet end of the water replenishing pump is in communication with the water seal tank through the water replenishing pipeline.

[0020] In order to better realize the present application, further optimization is made in the above structure, and the water replenishing pipeline comprises a water replenishing main pipeline and a water replenishing branch pipeline.

[0021] The number of the water supplement branch pipes is equal to the number of the water seal tanks, and the water outlet ends of the water supplement branch pipes are in one-to-one correspondence with the water seal tanks;

[0022] The water inlet end of the water supplement main pipe is communicated with the water supplement pump, and the water outlet end of the water supplement main pipe is communicated with the water inlet ends of the water supplement branch pipes.

[0023] In order to better realize the present application, the on-off valve for opening and closing the water supplement branch pipe is arranged on the water supplement branch pipe in the above structure.

[0024] In order to better realize the present application, the water supplement valve is arranged at the water inlet end of the water supplement main pipe in the above structure.

[0025] From the above technical solution, it can be seen that each group of water seal tanks in the step-by-step heating furnace water seal system provided by the present application is independently drained through an independent overflow pipe, and the water inlet end of the overflow pipe is at the normal working water level of the water seal tank. Whether the water level in the water seal tank can meet the normal working of the step-by-step heating furnace water seal system can be judged by simply observing whether water flows out of the drainage end of the overflow pipe. Moreover, the independent overflow pipe is a simple mechanical structure, and its cost and failure rate are low, which is more suitable for the production of steel. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the overflow drainage pipeline of the water seal tank in the prior art.

[0027] Figure 2 It is a structural schematic diagram of a step-by-step heating furnace water seal system provided by the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1-water seal tank;

[0030] 2-overflow pipe;

[0031] 31-drainage main pipe, 32-drainage branch pipe;

[0032] 41-water supplement main pipe, 42-water supplement branch pipe;

[0033] 51-drainage valve, 52-on-off valve, 53-water supplement valve. DETAILED DESCRIPTION

[0034] In order to make the person skilled in the art to which the present application belongs understand the present application more clearly, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments.

[0035] In the embodiments of the present application, as Figure 2As shown, the water seal system of the step-by-step heating furnace comprises a water seal tank 1 and an overflow pipe 2; wherein,

[0036] The number of the water seal tank 1 is equal to the number of the moving beam in the step-by-step heating furnace, and the water seal tank 1 is arranged one by one below the moving beam in the step-by-step heating furnace;

[0037] The number of the overflow pipe 2 is equal to the number of the water seal tank 1, and the water inlet end of all the overflow pipes 2 communicates with the water seal tank 1 one by one, the height of the water inlet end of all the overflow pipes 2 is the normal working water level height of the water seal tank 1, and the water outlet end of the overflow pipe 2 extends to the drainage ditch.

[0038] Before the step-by-step heating furnace works, the staff can supplement water to the water seal tank 1 until water flows out of the water outlet end of the overflow pipe 2;

[0039] Then, the staff can start the step-by-step heating furnace to heat the steel entering the step-by-step heating furnace;

[0040] During the working process of the step-by-step heating furnace, the staff can judge whether the water level in the water seal tank 1 can meet the normal working of the water seal system of the step-by-step heating furnace by observing whether water flows out of the water outlet end of the overflow pipe 2; if water always flows out of the water outlet end of the overflow pipe 2, it means that the water level in the water seal tank 1 is always at the normal working water level; if there is no water flowing out of the water outlet end of the overflow pipe 2, it means that the water level in the water seal tank 1 is lower than the normal working water level, there may be a risk of sealing, and the staff should supplement water to the water seal tank 1 in time to avoid external cold air entering the step-by-step heating furnace.

[0041] In some embodiments, the above-mentioned overflow pipe 2 is provided with a pipeline photoelectric liquid level sensor at the end away from the water seal tank 1, and the pipeline photoelectric liquid level sensor is connected with a terminal, and the staff can understand the water level state in the water seal tank 1 through the information transmitted by the pipeline photoelectric liquid level sensor to the terminal;

[0042] Specifically, when water flows through the water outlet end of the overflow pipe 2, the pipeline photoelectric liquid level sensor sends a normal potential signal to the terminal; if there is no water flowing through the overflow pipe 2, the pipeline photoelectric liquid level sensor sends an abnormal potential signal to the terminal, and the staff needs to supplement water to the water seal tank 1 in time after seeing the abnormal potential signal to avoid the water level in the water seal tank 1 being too low to cause external cold air to enter the step-by-step heating furnace.

[0043] It should be noted that the above-mentioned pipeline photoelectric liquid level sensor mainly relies on infrared optical components for water flow detection. The sensor is designed with an optical sensing circuit, which uses the different refractive indices of water and air for infrared light to determine the presence of water. Specifically, when water flows through the sensing area of the sensor, the refractive index of infrared light in water and air is different, and the sensor can detect the change in the refractive index of light to determine in real time whether there is water in the water pipe. This method has high accuracy and fast response, and since there are no mechanical moving parts, it is not prone to mechanical jamming or wear and tear;

[0044] The terminal is a computer, and the water flow information detected by the pipeline photoelectric liquid level sensor can be converted into an electric potential signal and sent to the terminal for display, so that the staff can timely understand whether water flows out of the overflow pipe 2.

[0045] Of course, the pipeline photoelectric liquid level sensor also has a probability of failure, so it cannot be relied on too much to determine the water level state of the water seal tank 1, and the actual state of the water discharge end of the overflow pipe 2 should also be checked regularly to ensure the working state of the step-by-step heating furnace.

[0046] In some embodiments, the step-by-step heating furnace water seal system further comprises a drain pipe, the water inlet end of the drain pipe is in communication with the water seal tank 1, and the water discharge end of the drain pipe extends to the drain ditch; when the step-by-step heating furnace water seal system needs to be maintained, the staff can drain the water in the water seal tank 1 to the drain ditch through the drain pipe, so as to facilitate the maintenance of the step-by-step heating furnace water seal system.

[0047] In some embodiments, the above-mentioned drain pipe comprises a drain main pipe 31 and a drain branch pipe 32; wherein,

[0048] The number of drain branch pipes 32 matches the number of water seal tanks 1, and the water inlet end of the drain branch pipe 32 is in communication with the water seal tank 1;

[0049] The water discharge end of the drain main pipe 31 extends to the drain ditch, and the water outlet end of all the drain branch pipes 32 is in communication with the water inlet end of the drain main pipe 31, so as to reduce the use of materials of the drain pipe, thereby reducing the manufacturing cost of the step-by-step heating furnace water seal system. Preferably, the water inlet end of the drain branch pipe 32 is provided with a drain valve 51 for opening / closing the drain branch pipe 32; the drain valve 51 is a normally closed valve, and when the water seal tank 1 needs to be maintained, the drain valve 51 on the drain branch pipe 32 can be opened to drain the water in the water seal tank 1, so as to facilitate the maintenance of the water seal tank 1; the number of water seal tanks 1 to be maintained can be one or more, so as to make the maintenance of the step-by-step heating furnace water seal system more convenient.

[0050] In some embodiments, the water-sealing system of the step-by-step heating furnace further comprises a water-supplying device for supplying water into the water-sealing tank 1, and the water-supplying device is communicated with the water-sealing tank 1 at the water outlet end, so as to make the water supply of the water-sealing tank 1 more convenient.

[0051] In some embodiments, the water-supplying device comprises a water-supplying pump (not shown in the figure) and a water-supplying pipeline, wherein,

[0052] The water inlet end of the water-supplying pump is communicated with a water source, and the water outlet end of the water-supplying pump is communicated with the water-sealing tank 1 through the water-supplying pipeline, so that the water-supplying pump can be started to suck the water from the water source into the water-sealing tank 1, thereby completing the water supply of the water-sealing tank 1.

[0053] In some embodiments, the water-supplying pipeline comprises a water-supplying main pipeline 41 and water-supplying branch pipelines 42.

[0054] The number of the water-supplying branch pipelines 42 is equal to the number of the water-sealing tanks 1, and the water outlet ends of the plurality of water-supplying branch pipelines 42 are communicated with the plurality of water-sealing tanks 1 one by one.

[0055] The water inlet end of the water-supplying main pipeline 41 is communicated with the water-supplying pump, and the water outlet end of the water-supplying main pipeline 41 is communicated with the water inlet ends of the plurality of water-supplying branch pipelines 42, and the water is sent into the corresponding water-sealing tank 1 through the plurality of water-supplying branch pipelines 42. Preferably, the water-supplying branch pipeline 42 is provided with an on-off valve 52 for opening / closing the water-supplying branch pipeline 42.

[0056] When the water level of one of the water-sealing tanks 1 is lower than the normal working water level, and the water levels of the other water-sealing tanks 1 are at the normal working water level, the water-supplying pump can be started, and the on-off valve 52 of the water-supplying branch pipeline 42 corresponding to the water-sealing tank 1 with the water level lower than the normal working water level is opened, so that the water can flow into the water-sealing tank 1 through the water-supplying branch pipeline 42, thereby completing the water supply; and the other water-sealing tanks 1 do not need to be watered, thereby reducing the waste of water resources.

[0057] In some embodiments, the water inlet end of the water-supplying main pipeline 41 is provided with a water-supplying valve 53.

[0058] Through the above embodiments, the present application has the following beneficial effects or advantages:

[0059] Each group of the water-sealing tanks 1 in the water-sealing system of the step-by-step heating furnace is independently drained through the independent overflow pipe 2, and the water inlet end of the overflow pipe 2 is at the normal working water level of the water-sealing tank 1, so that whether the water level in the water-sealing tank 1 can meet the normal working of the water-sealing system of the step-by-step heating furnace can be simply judged by observing whether the water flows out of the water drainage end of the overflow pipe 2, and the independent overflow pipe 2 is a simple mechanical structure, which has a lower cost and failure rate, and is more suitable for the production of steel.

[0060] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those of ordinary skill in the art once they have the benefit of the foregoing description. Therefore, the appended claims are intended to encompass within their scope all such variations and modifications as are within the scope of the application. It is to be understood that the application is not limited to particular embodiments described, and is intended to include all modifications and alterations from this description.

[0061] It is apparent that many modifications and variations of this application can be effected although only a few have been chosen for purposes of disclosure. Thus, it is intended to embrace all alternatives and modifications of the described embodiments.

Claims

1. A water seal system for a walking beam furnace, characterized by, The utility model relates to a water seal groove (1) for containing water to match the skirt seal of furnace bottom to seal the furnace cavity, the number of the water seal groove (1) is equal to the number of the movable beam in the step-by-step heating furnace, the overflow pipe (2) is used for discharging the water exceeding the normal working water level, the number of the overflow pipe (2) is equal to the number of the water seal groove (1), and the water inlet end of all the overflow pipes (2) is communicated with the water seal groove (1) one by one, the height of the water inlet end of the overflow pipe (2) is the normal working water level of the water seal groove (1), and the water outlet end of the overflow pipe (2) extends to the drainage ditch, wherein when the water flows out of the water outlet end of the overflow pipe (2), the water level in the water seal groove (1) can meet the normal working of the water seal system of the step-by-step heating furnace. The water outlet end of the overflow pipe (2) is provided with a pipeline photoelectric liquid level sensor. The utility model further includes a drainage pipeline, the water inlet end of the drainage pipeline is communicated with the water seal groove (1), and the water outlet end of the drainage pipeline extends to the drainage ditch.

2. The water seal system of a walking beam furnace according to claim 1, wherein, The drainage pipeline includes a drainage main pipe (31) and a drainage branch pipe (32).

3. The walking beam furnace water seal system of claim 1, wherein, The number of the drainage branch pipe (32) matches the number of the water seal groove (1), and the water inlet end of the drainage branch pipe (32) is communicated with the water seal groove (1).

4. The water seal system of a walking beam furnace as claimed in claim 3, wherein, The water outlet end of the drainage main pipe (31) extends to the drainage ditch, and the water outlet ends of all the drainage branch pipes (32) are communicated with the water inlet end of the drainage main pipe (31). The water inlet end of the drainage branch pipe (32) is provided with a drainage valve (51) for opening / closing the drainage branch pipe (32). The utility model further includes a water supplement device for injecting water into the water seal groove (1), and the water outlet end of the water supplement device is communicated with the water seal groove (1).

5. The water seal system of a walking beam furnace as claimed in claim 4, wherein, The water supplement device includes a water supplement pump and a water supplement pipeline.

6. The walking beam furnace water seal system of claim 1, wherein, The water inlet end of the water supplement pump is communicated with a water source, and the water outlet end of the water supplement pump is communicated with the water seal groove (1) through the water supplement pipeline.

7. The water seal system of a walking beam furnace as claimed in claim 6, wherein, The water supplement pipeline includes a water supplement main pipe (41) and a water supplement branch pipe (42). The number of the water supplement branch pipe (42) is equal to the number of the water seal groove (1), and the water outlet ends of the plurality of water supplement branch pipes (42) are communicated with the plurality of water seal grooves (1) one by one.

8. The water seal system of a walking beam furnace as claimed in claim 7, wherein, The water inlet end of the water supplement main pipe (41) is communicated with the water supplement pump, and the water outlet end of the water supplement main pipe (41) is communicated with the water inlet ends of the plurality of water supplement branch pipes (42). The water supplement branch pipe (42) is provided with an on-off valve (52) for opening / closing the water supplement branch pipe (42). The water inlet end of the water supplement main pipe (41) is provided with a water supplement valve (53).

9. The water seal system of a walking beam furnace as claimed in claim 8, wherein, ​ 10. The water seal system of a walking beam furnace as claimed in claim 9, wherein, ​

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