Adjusting device for high-pressure sealing surface of hot-blast stove valve

Abstract

The utility model discloses a hot-blast stove valve high-pressure sealing surface adjusting device, relates to the technical field of valve structures, and solves the problems that a valve plate is difficult to open and the maintenance difficulty is increased after the valve plate closes a sealing surface. Comprising a pull rod balance beam connected to a valve plate, the pull rod balance beam is connected to a lifting driving assembly, the lifting driving assembly drives the pull rod balance beam to ascend and descend, and the lifting path of the pull rod balance beam passes through an upper limiting assembly and a lower limiting assembly; the adjusting limiting rod is blocked at the lower end of a lifting path of the pull rod balance beam; the adjusting limiting rod moves in the lifting direction of the pull rod balance beam through the adjusting piece to adjust the distance between the adjusting limiting rod and the pull rod balance beam. The stability of opening and closing actions of the valve can be improved, the valve plate is prevented from closing the sealing surface, and the effect of improving the safety of the internal structure of the valve is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve structure technology, and in particular to a high-pressure sealing surface adjustment device for hot blast stove valves. Background Technology

[0002] Hot air valves, air combustion valves, gas combustion valves, flue valves, and other valves are important components of hot air stoves. The opening and closing of these valves are accomplished by a tie rod balance beam. The tie rod balance beam moves downward, causing it to descend until the valve is closed.

[0003] However, if the valve plate closes beyond the sealing surface due to a malfunction or other reasons, that is, the pull rod continues to move the valve plate downwards after the valve is closed, until the valve plate is stuck. Because the valve plate guide groove is wedge-shaped, it forms a wedge-like structure with the guide block inside the valve body. When the valve plate descends, it will press against the guide blocks on both sides more and more tightly, making it difficult to open the valve plate, damaging the valve, increasing the difficulty of maintenance, and seriously affecting blast furnace production. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure sealing surface adjustment device for hot blast stove valves, which can improve the stability of valve opening and closing actions, prevent the valve plate from closing too far from the sealing surface, improve the safety of the valve's internal structure, reduce problems such as jamming, ensure that the valve can be effectively sealed every time, and ensure normal production of the blast furnace.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A high-pressure sealing surface adjustment device for a hot blast stove valve includes a tie rod balance beam connected to a valve plate. The tie rod balance beam is connected to a lifting drive assembly, which drives the tie rod balance beam to rise and fall. The rising and falling path of the tie rod balance beam passes through an upper limit assembly and a lower limit assembly. The lower limit assembly includes several adjusting limit rods and adjusting components. The adjusting limit rods are positioned at the lower end of the rising and falling path of the tie rod balance beam. The adjusting limit rods move along the rising and falling direction of the tie rod balance beam through the adjusting components to adjust the distance between them and the tie rod balance beam.

[0007] Furthermore, the upper limit component includes an upper proximity switch.

[0008] Furthermore, the lower limit component includes a lower proximity switch.

[0009] Furthermore, the adjusting component includes a threaded cylinder, and the adjusting limit rod has threads on its outer periphery and is threadedly connected to the threaded cylinder.

[0010] Furthermore, the threaded cylinder includes a cylindrical tube and a nut connected to the upper end of the cylindrical tube, with an adjusting limit rod threaded into the nut and its lower end inserted downward into the cylindrical tube.

[0011] Furthermore, the lifting drive assembly includes several sets of transmission chains and drive components. The drive components drive the transmission chains, which are connected to the tie rod balance beam and drive it to move up and down.

[0012] Furthermore, the driving component includes a hydraulic cylinder, the output end of which is connected to a counterweight, the counterweight is connected to a transmission chain, and the counterweight and the tie rod balance beam are located on opposite sides of the transmission chain.

[0013] Furthermore, a counterweight guide rod is provided through the counterweight block, and the counterweight guide rod is arranged along the moving direction of the counterweight block.

[0014] In summary, this utility model has the following beneficial effects:

[0015] As the equipment is used continuously, if a malfunction occurs, such as the proximity switch sensor aging, loosening, or being damaged, resulting in insufficient signal transmission or no transmission at all, the hydraulic cylinder will continue to work, driving the valve plate to continue moving downwards. The valve sealing surface is only five centimeters wide, causing the valve plate to close beyond the sealing surface, leading to valve sealing failure. Alternatively, when the transmission chain breaks, the valve plate may suddenly fall, causing the valve plate to jam and deform.

[0016] Once the valve plate is stuck, it is extremely difficult to open the valve again. The valve needs to be repaired or even replaced, which seriously affects production and may even require shutdown to replace the valve. This has a very negative impact on production and equipment.

[0017] This application utilizes a proximity switch in conjunction with an adjustable limit rod to ensure that the normal operation of the valve is not affected during normal equipment operation. However, if the proximity switch on the valve malfunctions or the transmission chain suddenly breaks, the valve plate may continue to close or suddenly fall, causing the valve plate to jam, deform, or the transmission chain to break. The adjustable limit rod effectively prevents the valve plate from closing too far from the sealing surface or the transmission chain from suddenly breaking, protecting the valve from jamming and internal equipment from damage, ensuring that the valve can be opened and closed normally, and guaranteeing the normal production of the hot blast stove and blast furnace. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a high-pressure sealing surface adjustment device for a hot blast stove valve according to this utility model;

[0019] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0020] Figure 3 This is a schematic diagram of the adjusting limit rod part in the high-pressure sealing surface adjusting device for hot blast stove valves according to this utility model.

[0021] In the diagram, 0 is the valve body; 1 is the hydraulic cylinder; 2 is the transmission chain; 3 is the counterweight; 4 is the counterweight guide rod; 5 is the transmission sprocket; 6 is the upper proximity switch; 7 is the lower proximity switch; 8 is the tie rod balance beam; 9 is the adjusting limit rod; and 10 is the threaded cylinder. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These embodiments do not constitute a limitation on this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0023] A high-pressure sealing surface adjustment device for a hot blast stove valve, such as Figure 1 As shown, it includes a mounting bracket fixedly installed on the upper side of the valve body 0 and a tie rod balance beam 8 connected to the valve plate. The tie rod balance beam 8 is connected to the lifting drive assembly, which drives the tie rod balance beam 8 to rise and fall. The rising and falling path of the tie rod balance beam 8 passes through the upper limit assembly and the lower limit assembly.

[0024] like Figure 1 and Figure 2 As shown, the lifting drive assembly includes several sets of transmission chains 2 and drive components (in this embodiment, there are two sets, symmetrically installed on the front and rear sides of the mounting frame). The drive components drive the transmission chains 2, which are connected to the tie rod balance beam 8 and drive it to move up and down. Sprocket sets are symmetrically installed on both sides of the mounting frame. Each sprocket set includes four rectangularly distributed transmission sprockets 5, which are matched with the corresponding transmission chains 2, and the transmission chains 2 are constrained into a rectangle so that counterweights 3 and tie rod balance beams 8 can be installed on the left and right sides respectively. In other embodiments, the transmission sprockets 5 and transmission chains 2 can also be replaced with matching synchronous belts and synchronous pulleys, etc.

[0025] In this embodiment, the driving component includes a hydraulic cylinder 1 fixed in the mounting frame. The output end of the hydraulic cylinder 1 is vertically upward and fixedly connected to the counterweight 3. The counterweight 3 is connected to the transmission chain 2, and the counterweight 3 and the tie rod balance beam 8 are located on opposite sides of the transmission chain 2. A counterweight guide rod 4 is inserted through the counterweight 3. The counterweight guide rod 4 is vertically arranged, and both its upper and lower ends are fixed in the mounting frame. The counterweight guide rod 4 is arranged along the moving direction of the counterweight 3.

[0026] like Figure 1 and Figure 3 As shown, the upper limit assembly includes an upper proximity switch 6, and the lower limit assembly includes a lower proximity switch 7, several adjusting limit rods 9, and adjusting components. The upper proximity switch 6 and the lower proximity switch 7 are connected to different height positions of the mounting bracket, corresponding to the upper and lower stops of the tie rod balance beam 8, forming an area for the tie rod balance beam 2 to rise and fall, so that the valve opens or closes, corresponding to the on / off control of the lifting drive assembly.

[0027] The adjusting limit rod 9 is positioned at the lower end of the lifting path of the tie rod balance beam 8 to further protect the valve during closing. The adjusting limit rod 9 moves along the lifting direction of the tie rod balance beam 8 via the adjusting component to adjust the distance between it and the tie rod balance beam 8, adapting to different installation results and limiting requirements. In this embodiment, the adjusting component includes a threaded cylinder 10. The adjusting limit rod 9 has threads on its outer circumference (in this embodiment, the adjusting limit rod 9 is an M30X180 screw with a tightened nut) and is threaded into the threaded cylinder 10. For ease of installation, the threaded cylinder 10 includes a cylindrical tube and a nut (M30) connected to the upper end of the cylindrical tube. The cylindrical tube is a cylindrical steel tube with a length of 25 cm and a diameter of 35 mm. The adjusting limit rod 9 is threaded into the nut, and its lower end is inserted downward into the cylindrical tube to achieve height adjustment. A pre-processed 200X150X20 steel plate can be welded to the lower side of the tie rod balance beam 8 as a support point to achieve mutual contact.

[0028] The adjusting component is welded to the lower part of the valve plate tie rod balance beam 8. When the valve is closed to the center of the sealing surface, the height of the adjusting device is fixed by rotating the bolt and tightening the nut. When the valve is closed, the adjusting limit rod 9 can effectively stop the tie rod balance beam 8 from falling, thereby stopping the valve plate from falling, ensuring that the valve can be effectively sealed every time, and ensuring normal production of the blast furnace.

[0029] Working principle:

[0030] The opening and closing operations of valves such as hot air valve, air combustion valve, gas combustion valve, and flue valve are completed by the counterweight 3 connected to the hydraulic cylinder 1 driving the transmission chain 2 and the tie rod balance beam 8. When the hydraulic cylinder 1 opens and moves upward, the counterweight 3 moves upward with the hydraulic cylinder 1, driving the connected transmission chain 2 to rotate clockwise, causing the tie rod balance beam 8 to move downward and descend to the position where the lower proximity switch 7 receives the signal, causing the hydraulic cylinder 1 to stop moving and completing the valve closing action.

[0031] An adjusting limit rod 9 is installed below the valve plate tie rod balance beam 8. The cylinder 1 drives the counterweight 3 to pull the transmission chain 2. Under the drive of the chain, the tie rod balance beam 8 drives the valve plate to move up and down. When the valve needs to be opened, the tie rod balance beam 8 moves upward under the drive of the transmission chain 2 until the upper proximity switch 6 receives the signal and stops moving, thus completing the valve opening. When the valve needs to be closed, the tie rod balance beam 8 moves downward under the drive of the transmission chain 2 until the lower proximity switch 7 receives the signal and stops moving, thus completing the valve closing.

[0032] When the proximity switch below malfunctions, the electrical signal will no longer be transmitted, or the chain will suddenly break. The valve plate will drive the tie rod balance beam 8 to continue moving downward. At this time, the adjusting limit rod 9 is stopped at the lower end of the lifting path of the tie rod balance beam 8, which can stop the valve plate from moving downward, protect the limit device inside the valve body 0 from being damaged, and prevent the transmission chain 2 from being broken, ensuring that the valve can be opened and closed normally without affecting the normal production of the blast furnace.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A high-pressure sealing surface adjustment device for a hot blast stove valve, characterized in that: The device includes a tie rod balance beam connected to a valve plate, which is connected to a lifting drive assembly. The lifting drive assembly drives the tie rod balance beam to rise and fall, and the rising and falling path of the tie rod balance beam passes through an upper limit assembly and a lower limit assembly. The lower limit assembly includes several adjusting limit rods and adjusting components. The adjusting limit rods are positioned at the lower end of the rising and falling path of the tie rod balance beam. The adjusting limit rods move along the rising and falling direction of the tie rod balance beam through the adjusting components to adjust the distance between them and the tie rod balance beam.

2. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 1, characterized in that: The upper limit component includes an upper proximity switch.

3. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 1 or 2, characterized in that: The lower limit component includes a lower proximity switch.

4. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 1, characterized in that: The adjusting component includes a threaded cylinder, and the adjusting limit rod has threads on its outer circumference and is threadedly connected to the threaded cylinder.

5. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 4, characterized in that: The threaded cylinder includes a cylindrical tube and a nut connected to the upper end of the cylindrical tube. An adjusting limit rod is threaded into the nut, and its lower end is inserted downward into the cylindrical tube.

6. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 1, characterized in that: The lifting drive assembly includes several sets of transmission chains and drive components. The drive components drive the transmission chains, which are connected to the tie rod balance beam and drive it to move up and down.

7. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 6, characterized in that: The driving component includes a hydraulic cylinder, the output end of which is connected to a counterweight, which is connected to a transmission chain, and the counterweight and the tie rod balance beam are located on opposite sides of the transmission chain.

8. The high-pressure sealing surface adjustment device for hot blast stove valves according to claim 7, characterized in that: A counterweight guide rod is inserted through the counterweight block, and the counterweight guide rod is set along the moving direction of the counterweight block.

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