Blast furnace gas bleeder valve control device

Abstract

The application provides a blast furnace gas diffusion valve control device, which is provided with a main controller, the rotation angle of a transmission chain wheel is collected, the rotation angle of a hoisting drum is obtained, and then the rotation angle of the blast furnace gas diffusion valve is obtained, so that the opening and closing angle of the blast furnace gas diffusion valve is accurately controlled, and the problem of excessive opening and closing of the blast furnace gas diffusion valve is avoided; the controller is used for remotely opening and closing the explosion-proof motor, the remote control of the opening and closing of the blast furnace gas diffusion valve is realized, and the safety of the operator is ensured. Meanwhile, the tension adjusting nut and the adjusting spring in the safety structure are used to ensure that the blast furnace gas diffusion valve control device in the application can be flexibly applied to blast furnace gas diffusion valves with different counterweights, and the practicality of the blast furnace gas diffusion valve control device is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechatronic control, in particular to a blast furnace gas bleeder valve control device. BACKGROUND

[0002] Blast furnace ironmaking is the main method of modern ironmaking and an important link in steel production. The blast furnace gas bleeder valve is an important auxiliary equipment of the blast furnace and an important guarantee for the smooth charging of the blast furnace and the safe operation of the gas pipeline. Many factories are based on manual operation of the bleeder valve by workers. However, the blast furnace gas is high in temperature and pressure and contains a large amount of harmful gas, which is harmful to the human body. Moreover, the valve cover has a certain weight due to the counterweight, and the labor intensity is high when manually opening. There are also devices such as winches to assist in opening and closing the bleeder valve, but the winch in the prior art cannot accurately control the specific opening and closing angle, which can easily damage the sealing surface of the bleeder valve and cause damage to the bleeder valve. SUMMARY

[0003] In order to solve the problem that the blast furnace gas bleeder valve in the prior art is mainly controlled by manual operation and cannot be precisely controlled, and the equipment is damaged, the present application provides a blast furnace gas bleeder valve control device, which can realize remote control of the opening and closing of the blast furnace gas bleeder valve and accurately control the opening and closing angle of the bleeder valve.

[0004] The technical scheme of the present application is as follows: a blast furnace gas bleeder valve control device, comprising: a winch device, a driving structure,

[0005] The winch device is arranged below the bleeder valve, and the winch device comprises: a winch, a steel wire rope, and a transmission gear,

[0006] The steel wire rope is wound around the winch, and the winch is connected to the tail of the bleeder valve through the steel wire rope; the transmission gear is fixedly arranged on the driving shaft of the winch;

[0007] The winch device is driven by the driving structure to rotate and pull the bleeder valve through the steel wire rope to control the opening and closing of the bleeder valve;

[0008] characterized in that it further comprises: a controller, a master controller, and a transmission structure;

[0009] The transmission structure comprises: a transmission sprocket, a transmission gear, and a transmission shaft, and the transmission sprocket and the transmission gear are respectively sleeved on both ends of the transmission shaft;

[0010] The transmission gear is in meshing connection with the transmission gear;

[0011] The drive structure includes a motor drive structure; the motor drive structure includes an explosion-proof motor, which drives the transmission shaft to rotate via a planetary reducer, and the transmission shaft drives the winch drum to rotate via the transmission gear and transmission teeth;

[0012] The explosion-proof motor and the master controller are electrically connected to the controller;

[0013] The transmission sprocket drives the master controller via a roller chain, causing the proximity switch of the master controller to acquire the rotation angle of the transmission sprocket.

[0014] Its further features are:

[0015] The transmission structure further includes a gear ring, which is fitted on the transmission shaft and located between the transmission sprocket and the transmission gear; the explosion-proof motor is connected to the planet carrier of the planetary reducer through gears, and the planet gears of the planetary reducer are connected to the gear ring fixed on the outer circumference of the transmission shaft.

[0016] The drive structure also includes a manual drive structure, which includes a handwheel and a worm gear structure mounted via a handwheel bracket; the worm gear structure includes a worm gear and a worm; the handwheel is located at one end of the worm, the worm gear is fixedly connected to the outer circumference of the transmission shaft, and the internal gear ring of the worm gear meshes with the planetary gear.

[0017] It also includes a safety structure, which includes: a spring cavity, an adjusting spring, a second collateral block, a first collateral block, a pin, and a limit switch;

[0018] When the explosion-proof motor is working, the force applied by the worm gear to the worm causes the worm to travel in the direction of the worm's travel, which is recorded as the worm's travel direction.

[0019] The spring cavity is provided with a tension adjustment nut at one end in the direction of the worm gear stroke, and the other end is fixed to the handwheel bracket;

[0020] The end of the worm gear away from the handwheel passes sequentially through the handwheel bracket, the spring cavity, and the tension adjusting nut, and is then limited to the tension adjusting nut by the worm gear limiting block.

[0021] The first and second collateral blocks are fitted onto the rod body of the worm located within the spring cavity, and the adjusting spring is fitted onto the outer circumference of the worm between the first and second collateral blocks; the two ends of the adjusting spring are respectively collateralized onto the second collateral block and the first collateral block.

[0022] The limit switch is fixedly mounted on the handwheel bracket and is communicatively connected to the controller; one end of the ejector pin is fixed to the worm gear, and the other end is located on the side of the limit switch opposite to the travel direction;

[0023] The tension adjusting nut is connected to the outer wall of the spring cavity by a threaded engagement.

[0024] The blast furnace gas vent valve control device provided by this invention is equipped with a master controller. By acquiring the rotation angle of the transmission sprocket, the rotation angle of the winch drum is obtained, and thus the rotation angle of the blast furnace gas vent valve is obtained, achieving precise control of the valve's opening and closing angle and avoiding over-opening / closing of the blast furnace gas vent valve. The controller also enables remote switching of the explosion-proof motor, achieving remote control of the blast furnace gas vent valve's operation and ensuring operator safety. Furthermore, the device utilizes a tension adjusting nut and adjusting spring in its safety structure to ensure that the blast furnace gas vent valve control device is flexibly applicable to blast furnace gas vent valves with different counterweights, enhancing its practicality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the position and structure of the blast furnace gas venting valve control device of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the blast furnace gas venting valve control device of the present invention.

[0027] Figure 3 For motor drive structure and transmission structure in Figure 2 A schematic diagram of the cross-section along the central AA direction;

[0028] Figure 4 For manual drive structure in Figure 2 A schematic diagram of the cross-section along the BB direction;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of the manual drive structure and the safety structure. Detailed Implementation

[0030] like Figure 1 , Figure 2 As shown, the blast furnace gas venting valve control device provided by the present invention includes: a winch device 1, a drive structure, a controller (not marked in the figure), a master controller 4, and a transmission structure 6.

[0031] The winch drum 1 is mounted on the base 10 via a bearing seat 9. The winch drum assembly is located below the relief valve 13. The relief valve 13 is equipped with a counterweight 14 and a mechanical limit structure 15. The controller is remotely installed in a remote control room, allowing technicians to remotely control the relief valve 13 and switch between manual and automatic control.

[0032] The winch assembly includes a winch drum 1, a wire rope 11, and a transmission gear 2. The wire rope 11 is wound around the outer circumference of the winch drum 1. The winch drum 1 is connected to the tail of the relief valve 13 via the wire rope 11 and a pulley 16. The transmission gear 2 is fixedly installed on the drive shaft of the winch drum 1. Driven by the drive structure, the winch assembly rotates, pulling the relief valve 13 through the wire rope 11 to control the opening and closing of the relief valve.

[0033] like Figure 2 As shown, the transmission structure 6 includes: a transmission sprocket 6-1, a transmission shaft 6-2, a transmission gear 6-3, and a gear ring 6-4. The transmission sprocket 6-1 and the transmission gear 6-3 are respectively mounted on both ends of the transmission shaft 6-2; the gear ring 6-4 is disposed on the transmission shaft 6-2 between the transmission sprocket 6-1 and the transmission gear 6-3; the transmission gear 6-3 is meshed with the transmission gear 2.

[0034] The winch drum 1 is connected to the transmission structure 6 via the transmission gear 2, and then driven by the drive structure to ensure convenient maintenance in the later stage.

[0035] The drive structure includes motor drive structure and manual drive structure.

[0036] The motor drive structure includes: an explosion-proof motor 3, which drives the transmission shaft 6-2 to rotate through a planetary reducer 5, and the transmission shaft 6-2 drives the winch drum 1 to rotate through the transmission gear 6-3 and the transmission gear 2.

[0037] In practical implementation, the explosion-proof motor 3 is connected to the planetary carrier 5-1 of the planetary reducer 5 via gears, and the planetary gears 5-2 of the planetary reducer 5 are connected to the gear ring 6-4 fixed on the outer circumference of the transmission shaft 6-2. Simultaneously, a motor brake is installed at the tail of the explosion-proof motor 3. The specific motor brake control circuit and detection circuit can be implemented based on existing motor brakes.

[0038] Upon receiving a start command from the controller, the explosion-proof motor 3 drives the planetary carrier 5-1 to rotate. The planetary carrier 5-1 drives the planetary gears 5-2 to rotate, which in turn drive the gear ring 6-4 to rotate. The gear ring 6-4 is fixedly mounted on the transmission shaft 6-2, which rotates in the same direction. The transmission gear 6-3, fixed on the transmission shaft 6-2, drives the transmission gear 2 meshing with it to rotate, causing the winch drum 1 to rotate in the same direction. This achieves the rotation of the winch drum 1 driven by the explosion-proof motor 3. As the winch drum 1 rotates in different directions, when the wire rope 11 winds onto the winch drum 1, the wire rope pulls the release valve 13, opening it. When the wire rope 11 is released from the winch drum 1, the release valve 13 moves in the opposite direction under the influence of the counterweight 14, closing it.

[0039] The explosion-proof motor 3 and the master controller 4 are electrically connected to the controller; the transmission sprocket 6-1 drives the master controller 4 through a roller chain, causing the proximity switch of the master controller 4 to collect the rotation angle of the transmission sprocket 6-1. The specific installation method is based on the existing setting method of the master controller 4.

[0040] like Figure 2 and Figure 3 As shown, the manual drive structure includes: a handwheel 7 fixedly mounted on the base 10 via a handwheel bracket 8-3 and a worm gear structure 8. The worm gear structure 8 includes a worm 8-1 and a worm wheel 8-2. The handwheel 7 is located at one end of the worm 8-1, and the worm wheel 8-2 is fixedly connected to the outer circumference of the drive shaft 6-2. The internal gear ring of the worm wheel 8-2 meshes with the planetary gear 5-2.

[0041] When the relief valve 13 needs to be manually driven, the operator manually rotates the handwheel 7, which rotates the worm gear 8-1, causing the meshing worm wheel 8-2 to rotate. The worm wheel 8-2 drives the planetary gear 5-2 through the internal gear ring, and the planetary gear 5-2 drives the gear ring 6-4 to rotate. The gear ring 6-4 is fixedly mounted on the transmission shaft 6-2, which rotates in the same direction. The transmission gear 6-3 mounted on the transmission shaft 6-2 drives the meshing transmission gear 2 to rotate, and the winch drum 1 rotates in the same direction. This realizes the rotation of the winch drum 1 driven by the handwheel 7, thereby realizing the manual opening and closing of the relief valve 13.

[0042] When using the technical solution of this invention to control the opening and closing of the relief valve 13, the operator clicks the control button in the remote control room, and sends a command to the explosion-proof motor 3 through the controller to control the operation of the explosion-proof motor 3. The explosion-proof motor 3 drives the winch drum 1 to tighten or loosen the wire rope 11 through the planetary reducer 5, thereby controlling the opening and closing of the relief valve. The function of the master controller 4 is to send a feedback signal to the controller after the relief valve is fully opened or closed, so that the controller can stop the operation of the explosion-proof motor 3 in time to prevent the winch drum 1 from overtraveling. Since the explosion-proof motor 3 has a brake at the tail, it can lock the position when the motor stops, keeping the relief valve in the open state. The handwheel 7 drives the planetary reducer 5 through the worm gear structure 8, and then drives the winch drum 1, so that the opening and closing of the relief valve can be manually controlled. Because the worm gear structure 8 has a reverse self-locking property, when the lead angle of the worm 8-1 is less than the equivalent friction angle between the meshing teeth, the reverse self-locking of the worm gear structure 8 is achieved. That is, only the worm 8-1 can drive the worm wheel 8-2, but the worm wheel 8-2 cannot drive the worm 8-1. Therefore, when the winch is driven by the motor-driven structure, the manual drive structure is not affected.

[0043] In this embodiment, a safety structure 12 is provided on the transmission structure 6 to protect the relief valve 13. For example... Figure 5 As shown, the safety structure includes: a pin 12-1, a limit switch 12-2, an adjusting spring 12-4, a spring cavity 12-5, and a first collateral block 12-6.

[0044] When the explosion-proof motor 3 is working, although the worm wheel 8-2 cannot drive the worm 8-1 to rotate, the worm wheel 8-2 will still transmit a part of the force to the worm 8-1. The heavier the counterweight 14 of the relief valve 13, the greater this force will be. Figure 5 In one embodiment, when the explosion-proof motor 3 is working, the worm gear 8-2 will cause the worm 8-1 to tend to move to the left.

[0045] In the technical solution of this invention, the direction in which the worm gear 8-2 applies force to the worm 8-1, causing the worm 8-1 to travel, is denoted as the worm travel direction.

[0046] One end of the spring cavity 12-5 in the direction of the worm gear stroke is provided with a tension adjustment nut 12-3, and the other end is fixed to the handwheel bracket 8-3; the end of the worm gear 8-1 away from the handwheel 7 passes through the handwheel bracket 8-3, the spring cavity 12-5, and the tension adjustment nut 12-3 in sequence, and is then limited on the tension adjustment nut 12-3 by the worm gear limiting block 8-4.

[0047] The tension adjusting nut 12-3 is fixedly mounted on the side wall of the inner cavity of the spring cavity 12-5 with a second collateral block 12-7. The second collateral block 12-7 is a cap-shaped structure with a U-shaped cross-section, with two vertical sides facing the tension adjusting nut 12-3 and a worm gear through hole on the horizontal side. The worm gear limiting block 8-4 is fixed on the outer circumference of the worm gear and has a T-shaped cross-section. The horizontal side of the T-shape on the worm gear limiting block 8-4 is the limiting side, and the width of the limiting side is greater than the through holes of the worm gear in the tension adjusting nut 12-3 and the second collateral block 12-7. The limiting side of the worm gear limiting block 8-4 is located inside the second collateral block 12-7, and the vertical side passes through the tension adjusting nut 12-3 together with the worm gear. When the worm gear 8-1 moves forward and backward in its axial direction, the worm gear limiting block 8-4 moves with the worm gear 8-1 in the through holes of the tension adjusting nut 12-3 and the second collateral block 12-7.

[0048] The first collateral block 12-6 is fitted onto the outer circumference of the worm gear located inside the spring cavity 12-5. A limiting sleeve 8-5 is fixedly installed on the worm gear 8-1, and the diameter of the limiting sleeve 8-5 is larger than the through hole of the worm gear 8-1 on the first collateral block 12-6. The adjusting spring 12-4 is fitted onto the outer circumference of the worm gear and is located inside the spring cavity 12-5. One end of the adjusting spring 12-4 is pressed against the outer wall of the second collateral block 12-7, and the other end is pressed against the first collateral block 12-6. When the worm gear moves forward and backward in its axial direction, the limiting sleeve 8-5 and the worm gear limiting block 8-4 push the first collateral block 12-6 and the second collateral block 12-7 to compress the adjusting spring 12-4 in the worm gear's traveling direction.

[0049] Limit switch 12-2 is fixedly mounted on handwheel bracket 8-3; one end of ejector pin 12-1 is fixed to worm gear, and the other end is located on the side of limit switch 12-2 opposite to the travel direction; under normal use, limit switch 12-2 is in the open state. The farthest distance between ejector pin 12-1 and limit switch 12-2 is equal to the preset allowable distance of worm gear.

[0050] like Figure 5In the illustrated embodiment, when the explosion-proof motor 3 is operating, the worm gear 8-2 exerts a force to the left on the worm 8-1. The first mortise block 12-6 and the ejector pin 12-1, fixed on the worm 8-1, also receive a force to the left along with the worm 8-1. The first mortise block 12-6 applies a leftward pressure to the adjusting spring 12-4. When the pressure of the first mortise block 12-6 is less than the reaction force of the adjusting spring 12-4, the worm 8-1 will not move. However, when the pressure of the first mortise block 12-6 is greater than the reaction force of the adjusting spring 12-4, the adjusting spring 12-4 is compressed, and the worm 8-1 moves to the left along with the first mortise block 12-6 and the ejector pin 12-1. When the ejector pin 12-1 reaches the preset allowable distance of the worm, it will close the limit switch 12-2. The limit switch 12-2 is communicatively connected to the controller and transmits a signal to the controller. After receiving the signal from the limit switch 12-2, the controller shuts down the explosion-proof motor 3.

[0051] In specific implementation, the tension adjusting nut 12-3 and the outer wall of the spring cavity 12-5 are engaged by threads. By screwing the tension adjusting nut 12-3 in and out, the compression of the spring 12-4 can be adjusted, thereby adjusting the spring 12-4 to counteract the pressure of the worm. At the same time, by adjusting the compression of the adjusting spring 12-4, the movement of the worm 8-1 will not trigger the limit switch 12-2, thereby adjusting the output tension of the explosion-proof motor 3. This also makes the vent valve control device of the present invention safe to be applied to vent valves of different models and counterweights.

[0052] Normally, the vent valve 13 has a mechanical limit structure 15. When the vent valve 13 is opened to the maximum angle, the mechanical limit structure 15 stops the vent valve 13 from opening further. If the master controller 4 malfunctions and cannot accurately detect the opening angle of the vent valve 13, it will not be able to stop the explosion-proof motor 3 in time when the vent valve 13 has been opened to the maximum angle, which will cause damage to the gas pipeline connected to the vent valve 13.

[0053] With the safety structure 12 in place, when the master controller 4 malfunctions and the winch drum 1 can no longer rotate, the force of the planetary gear 5-2 is applied to the worm gear 8-2. The force of the worm gear 8-2 on the worm 8-1 will be greater than the reaction force of the preset adjusting spring 12-4. The worm will then move to the left, causing the ejector pin 12-1 to close the limit switch 12-2, thereby shutting off the explosion-proof motor 3. This protects the vent valve 13 and the gas pipeline connected to it, ensuring the safe use of the equipment.

[0054] The transmission and drive structures of this invention precisely control the opening angle of the vent valve through a master controller, ensuring accurate control of the vent valve's opening angle. By incorporating a safety structure 12 with its internal adjusting spring 12-4 and adjusting nut 12-3, the control device can be adapted to the on / off control of different models of vent valves. This invention features both electric and manual operating modes, which do not interfere with each other and can adapt to different working conditions. The master controller's command control of the motor enables programmed control of start / stop and opening angle. A brake at the tail of the explosion-proof motor ensures the winch can self-lock, preventing the valve cover from falling down and ensuring sufficient gas discharge, effectively protecting the safety of workers. The safety structure ensures that even if the master controller malfunctions, the vent valve can still be used safely, and its flexibility allows for the application of various models and counterweights of vent valves, making the technical solution of this invention more practical.

Claims

1. A blast furnace gas vent valve control device, comprising: Winching drum device and drive structure; The winch assembly is located below the relief valve, and includes: a winch drum, a wire rope, and transmission gears. The wire rope is wound around the winch drum, and the winch drum is connected to the tail of the relief valve via the wire rope; the transmission gear is fixedly installed on the drive shaft of the winch drum. The winch device rotates under the drive of the drive structure, and pulls the relief valve through the wire rope to control the opening and closing of the relief valve; Its characteristic is that it further includes: a controller, a master controller, and a transmission structure; The transmission structure includes: a transmission sprocket, a transmission gear, and a transmission shaft, wherein the transmission sprocket and the transmission gear are respectively mounted on both ends of the transmission shaft; The transmission gear meshes with the transmission teeth; The drive structure includes a motor drive structure; the motor drive structure includes an explosion-proof motor, which drives the transmission shaft to rotate via a planetary reducer, and the transmission shaft drives the winch drum to rotate via the transmission gear and transmission teeth; The explosion-proof motor and the master controller are electrically connected to the controller; The transmission sprocket drives the master controller via a roller chain, causing the proximity switch of the master controller to collect the rotation angle of the transmission sprocket. The transmission structure further includes a gear ring, which is fitted on the transmission shaft and located between the transmission sprocket and the transmission gear; the explosion-proof motor is connected to the planet carrier of the planetary reducer through gears, and the planet gears of the planetary reducer are connected to the gear ring fixed on the outer circumference of the transmission shaft. The drive structure also includes a manual drive structure, which includes a handwheel and a worm gear structure mounted via a handwheel bracket; the worm gear structure includes a worm gear and a worm; the handwheel is located at one end of the worm, the worm gear is fixedly connected to the outer circumference of the transmission shaft, and the internal gear ring of the worm gear meshes with the planetary gear. It also includes a safety structure, which includes: a spring cavity, an adjusting spring, a second collateral block, a first collateral block, a pin, and a limit switch; When the explosion-proof motor is working, the force applied by the worm gear to the worm causes the worm to travel in the direction of the worm's travel, which is recorded as the worm's travel direction. The spring cavity is provided with a tension adjustment nut at one end in the worm gear travel direction and fixed to the handwheel bracket at the other end; The end of the worm gear away from the handwheel passes sequentially through the handwheel bracket, the spring cavity, and the tension adjusting nut, and is then limited to the tension adjusting nut by the worm gear limiting block. The first and second collateral blocks are fitted onto the rod body of the worm located within the spring cavity, and the adjusting spring is fitted onto the outer circumference of the worm between the first and second collateral blocks; the two ends of the adjusting spring are respectively collateralized onto the second collateral block and the first collateral block. The limit switch is fixedly mounted on the handwheel bracket and is communicatively connected to the controller; one end of the ejector pin is fixed to the worm gear, and the other end is located on the side of the limit switch opposite to the travel direction; It also includes a base, on which the winch drum is mounted via a bearing housing.

2. The blast furnace gas venting valve control device according to claim 1, characterized in that: The tension adjusting nut is connected to the outer wall of the spring cavity by a threaded engagement.

Images