Mud gun control system and mud ramming method

Abstract

The invention discloses a clay gun control system and a clay beating method. The technical problem that errors are prone to occurring in the prior art is solved. The clay gun control system comprises an oil tank, a clay gun rotation oil way and a clay gun mud beating oil way. The clay gun rotation oil way comprises a manual switch stop valve, a first three-position four-way electromagnetic valve, a second three-position four-way electromagnetic valve, an electromagnetic switch stop valve and a rotation oil cylinder. One side of the first three-position four-way electromagnetic valve is communicated with the oil tank, the other side of the first three-position four-way electromagnetic valve is communicated with the control end of the second three-position four-way electromagnetic valve through the electromagnetic switch stop valve, and the other side of the second three-position four-way electromagnetic valve is communicated with the rotary oil cylinder. And the oil tank is connected with the control end of the second three-position four-way electromagnetic valve after sequentially passing through the manual pilot valve and the manual switch stop valve. According to the manual and automatic integrated operation method of the clay gun control system, the failure rate of equipment is reduced, the automatic transformation cost is greatly reduced, and the labor intensity of maintenance personnel is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of blast furnace metallurgical mud gun control system, specifically relating to a mud gun control system and a mud-making method. Background Technology

[0002] During blast furnace production, after a certain time interval of normal production, the molten iron produced needs to be discharged. After the blast furnace is cleaned of slag and iron, the mud gun rotates through a slewing mechanism, aligning its nozzle with the taphole. Its mud-pumping mechanism then pumps special mud into the taphole. After maintaining a pressure of 21-24 MPa for 30 minutes, the taphole is blocked. Afterward, the hydraulic mud gun returns to its original stop position through the slewing mechanism.

[0003] Currently, both blast furnace No. 1 and No. 2 are equipped with three tapholes and three hydraulic mud guns. Two of the tapholes have right-hand rotating hydraulic mud guns, while the third taphole has a left-hand rotating hydraulic mud gun. The hydraulic mud gun consists of two main parts: a mud-beating mechanism and a slewing mechanism. The mud-beating mechanism is suspended from the rocker arm of the slewing mechanism by a hanging frame. The slewing mechanism is fixed to a fixed inclined base via a slewing base. Driven by a hydraulic cylinder, the mud-beating mechanism moves to the working position or standby position as required through the combined action of the crank arm and control lever.

[0004] According to environmental management requirements, the blast furnace tapping area must be completely enclosed. This creates numerous blind spots for operators in the control room when tapping or clogging the taphole, posing significant safety hazards. The intelligent transformation of the blast furnace tapping equipment is urgently needed. Existing equipment largely lacks intelligent control functions and relies on manual operation via a control panel. Due to information transmission barriers and misunderstandings, operators in the control room are prone to delays or misoperations during daily work. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this application provides a mud gun control system and a mud-making method.

[0006] The technical solution adopted to achieve the purpose of this application is as follows: In the first aspect of this application, the present invention discloses a mud gun control system, comprising:

[0007] tank;

[0008] The mud gun rotation hydraulic circuit includes a manual pilot valve, a manual switch valve, a first three-position four-way solenoid valve, a second three-position four-way solenoid valve, a solenoid switch valve, and a rotation cylinder. One side of the first three-position four-way solenoid valve is connected to the oil tank, and the other side of the first three-position four-way solenoid valve is connected to the control terminal of the second three-position four-way solenoid valve through the solenoid switch valve. The other side of the second three-position four-way solenoid valve is connected to the rotation cylinder. The oil tank is connected to the control terminal of the second three-position four-way solenoid valve after passing through the manual pilot valve and the manual switch valve.

[0009] The mud-pumping oil circuit includes a third-position four-way solenoid valve and a mud-pumping oil cylinder. One side of the third-position four-way solenoid valve is connected to the mud-pumping oil cylinder, and the other side of the third-position four-way solenoid valve is connected to the oil tank.

[0010] In some embodiments, the mud gun rotary oil circuit further includes an externally controlled sequence valve, which is disposed between the second three-position four-way solenoid valve and the rod chamber of the rotary cylinder.

[0011] In some embodiments, the mud gun rotary oil circuit further includes a balance valve, a high-pressure ball valve, a high-pressure relief valve, and a high-pressure hose, wherein the balance valve, the high-pressure ball valve, the high-pressure relief valve, and the high-pressure hose are disposed between the second three-position four-way solenoid valve and the rodless chamber of the rotary cylinder.

[0012] In some embodiments, the balance valve, the high-pressure ball valve, the high-pressure relief valve, and the high-pressure hose are sequentially disposed between the second three-position four-way solenoid valve and the rodless chamber of the rotary cylinder.

[0013] In some embodiments, the P port of the first three-position four-way solenoid valve is connected to the oil tank through the first oil outlet pipe, the T port of the first three-position four-way solenoid valve is connected to the oil tank through the first oil return pipe, the A port of the first three-position four-way solenoid valve is connected to the first end of the second three-position four-way solenoid valve, and the B port of the first three-position four-way solenoid valve is connected to the second end of the second three-position four-way solenoid valve.

[0014] When the first three-position four-way solenoid valve is in the left working position, hydraulic oil flows from the A valve port of the first three-position four-way solenoid valve to the second three-position four-way solenoid valve, so that the second three-position four-way solenoid valve changes from the middle working position to the left working position. At this time, the piston rod of the rotary cylinder extends.

[0015] In some embodiments, the oil tank is connected to the first end of the second three-position four-way solenoid valve via a fourth oil outlet pipe. The fourth oil outlet pipe is provided with the manual pilot valve and the manual switch valve. The A valve port of the first three-position four-way solenoid valve is connected to the fourth oil outlet pipe. The solenoid switch valve is located between the A valve port of the first three-position four-way solenoid valve and the fourth oil outlet pipe, and the solenoid switch valve is located between the manual switch valve and the second three-position four-way solenoid valve.

[0016] The oil tank is connected to the second end of the second three-position four-way solenoid valve via the fourth return oil pipe. The manual pilot valve and the manual switch valve are provided on the fourth return oil pipe. The A valve port of the first three-position four-way solenoid valve is connected to the fourth return oil pipe. The solenoid switch valve is located between the A valve port of the first three-position four-way solenoid valve and the fourth return oil pipe, and the solenoid switch valve is located between the manual switch valve and the second three-position four-way solenoid valve.

[0017] In some embodiments, the P port of the second three-position four-way solenoid valve is connected to the oil tank through a second oil outlet pipe, the T port of the second three-position four-way solenoid valve is connected to the oil tank through a second oil return pipe, the A port of the second three-position four-way solenoid valve is connected to the rodless chamber of the rotary cylinder, and the B port of the second three-position four-way solenoid valve is connected to the rod chamber of the rotary cylinder.

[0018] In some embodiments, the P port of the third three-position four-way solenoid valve is connected to the oil tank through a third oil outlet pipe, the T port of the third three-position four-way solenoid valve is connected to the oil tank through a third oil return pipe, the A port of the third three-position four-way solenoid valve is connected to the rodless chamber of the sludge cylinder, and the B port of the third three-position four-way solenoid valve is connected to the rod chamber of the sludge cylinder.

[0019] The technical solution adopted to achieve the purpose of this application is as follows: In the second aspect of this application, the present invention also discloses a mud-making method based on the mud gun control system described in the first aspect, which includes the following steps: Step 1: Close the manual pilot valve and the manual switch valve; Step 2: By controlling the first three-position four-way solenoid valve, the second three-position four-way solenoid valve is controlled, thereby driving the rotary cylinder to work. At the same time, the mud-removing cylinder is controlled by the third three-position four-way solenoid valve.

[0020] Step 3: Repeat step 2 at least twice.

[0021] In some embodiments, in step two, when the mud gun is blocked on the iron taphole and the pressure of the second oil outlet pipe rises to 21 MPa, the external control sequence valve is opened to the maximum, at which time the pressure of the rod chamber of the rotary cylinder is reduced to 0; the mud discharge pressure is set to 7 MPa to 9 MPa.

[0022] As can be seen from the above technical solution, the mud gun control system disclosed in this application includes an oil tank, a mud gun rotation oil circuit, and a mud gun slurry oil circuit. The mud gun rotation oil circuit includes a manual pilot valve, a manual switch valve, a first three-position four-way solenoid valve, a second three-position four-way solenoid valve, an electromagnetic switch valve, and a rotation cylinder. One side of the first three-position four-way solenoid valve is connected to the oil tank, and the other side of the first three-position four-way solenoid valve is connected to the control terminal of the second three-position four-way solenoid valve through the electromagnetic switch valve. The other side of the second three-position four-way solenoid valve is connected to the rotation cylinder. The oil tank is connected to the control terminal of the second three-position four-way solenoid valve after passing through the manual pilot valve and the manual switch valve. The mud gun slurry oil circuit includes a third three-position four-way solenoid valve and a slurry cylinder. One side of the third three-position four-way solenoid valve is connected to the slurry cylinder, and the other side of the third three-position four-way solenoid valve is connected to the oil tank.

[0023] The manual / automatic operation method of the mud gun control system disclosed in this application reduces the equipment failure rate, greatly reduces the cost of automation transformation, reduces the labor intensity of maintenance personnel, and avoids secondary pollution to the hydraulic system caused by frequent handling of such equipment failures. By using a second- or third-position four-way solenoid valve and a rotary cylinder to replace the proportional motor control device for controlling the mud gun, it can meet the requirements for rapid forward, reverse, and forward impacts on the furnace door, solving the problem that the proportional motor's operating speed cannot meet the usage requirements. Attached Figure Description

[0024] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] Figure 1 This is a schematic diagram of the mud cannon control system in one or more embodiments of this application;

[0026] Figure 2 for Figure 1 A schematic diagram of a three-position four-way solenoid valve.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Manual pilot valve; 7. Manual switch valve; 8. First three-position four-way solenoid valve; 9. Solenoid switch valve; 10. First oil outlet pipe; 11. Second three-position four-way solenoid valve; 12. Balance valve; 13. High-pressure ball valve; 14. High-pressure relief valve; 15. High-pressure hose; 16. Rotary cylinder; 17. Externally controlled sequence valve; 18. First oil return pipe; 19. Sludge removal cylinder. Detailed Implementation

[0029] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0032] This invention discloses a mud cannon control system, which can solve the technical problems that are prone to errors in the prior art.

[0033] The technical solution of this application will be described in detail below through specific embodiments:

[0034] See Figure 1 and Figure 2According to a first aspect of this application, a mud gun control system is provided, which includes an oil tank, a mud gun rotation oil circuit, and a mud gun slurry oil circuit. The mud gun rotation oil circuit includes a manual pilot valve 1, a manual switch valve 7, a first three-position four-way solenoid valve 8, a second three-position four-way solenoid valve 11, an electromagnetic switch valve 9, and a rotation cylinder 16. One side of the first three-position four-way solenoid valve 8 is connected to the oil tank, and the other side of the first three-position four-way solenoid valve 8 is connected to the control terminal of the second three-position four-way solenoid valve 11 via the electromagnetic switch valve 9. The other side of the second three-position four-way solenoid valve 11 is connected to the rotation cylinder 16. The oil tank is connected to the control terminal of the second three-position four-way solenoid valve 11 after passing through the manual pilot valve 1 and the manual switch valve 7. The mud gun slurry oil circuit includes a third three-position four-way solenoid valve and a slurry cylinder 19. One side of the third three-position four-way solenoid valve is connected to the slurry cylinder 19, and the other side of the third three-position four-way solenoid valve is connected to the oil tank.

[0035] The manual / automatic operation method of the mud gun control system disclosed in this embodiment reduces the equipment failure rate, greatly reduces the cost of automation transformation, reduces the labor intensity of maintenance personnel, and avoids secondary pollution to the hydraulic system caused by frequent handling of such equipment failures. By using a second- or third-position four-way solenoid valve 11 and a rotary cylinder 16 to replace the proportional motor control device for controlling the mud gun, it can meet the requirements for rapid forward, reverse, and forward impacts on the furnace door, solving the problem that the proportional motor's operating speed cannot meet the usage requirements.

[0036] In one embodiment, the system further includes a remote controller and a solenoid valve control device. The solenoid valve control device is electrically connected to the first three-position four-way solenoid valve 8 and is used to control the first three-position four-way solenoid valve 8.

[0037] In one embodiment, the mud gun rotation oil circuit further includes an external control sequence valve 17, which is disposed between the second three-position four-way solenoid valve 11 and the rod chamber of the rotation cylinder 16.

[0038] The externally controlled sequence valve 17 can open according to the set pressure. During the rotation of the mud gun, it can ensure that hydraulic oil will enter the rod chamber of the rotary cylinder 16 smoothly and push the piston to rotate only when a specific pressure condition is reached.

[0039] For example, in the entire working cycle of the mud gun, the rotation action needs to be performed in a strict sequence with other actions (such as mud pounding and pressurizing). By controlling the external sequence valve 17, it can be ensured that the mud gun performs the rotation action only after completing the preceding actions (such as pressurizing to the correct position and the system pressure reaching a certain value), thus avoiding chaotic actions and improving the stability and reliability of equipment operation.

[0040] When the system pressure does not reach the opening pressure of the externally controlled sequence valve 17, hydraulic oil cannot enter the rod chamber of the rotary cylinder 16. Even if the first three-position four-way solenoid valve 8 malfunctions (e.g., is accidentally energized, and the second three-position four-way solenoid valve 11 is controlled by the first three-position four-way solenoid valve 8), the rotary cylinder 16 will not actuate. In actual production, solenoid valves may malfunction due to electromagnetic interference, electrical faults, etc. The externally controlled sequence valve 17 acts like a "safety lock," effectively preventing accidental rotation of the mud gun caused by solenoid valve malfunction, avoiding damage to equipment and personnel, and ensuring production safety.

[0041] In one embodiment, the mud gun rotary hydraulic circuit further includes a balance valve 12, a high-pressure ball valve 13, a high-pressure relief valve 14, and a high-pressure hose 15. The balance valve 12, the high-pressure ball valve 13, the high-pressure relief valve 14, and the high-pressure hose 15 are disposed between the second three-position four-way solenoid valve 11 and the rodless chamber of the rotary cylinder 16.

[0042] The balance valve 12 is used to maintain pressure during the plugging process. At the same time, in order to prevent rapid backward movement when rotating the mud gun, the throttling device on the balance valve 12 is used to control the speed. The high-pressure relief valve 14 is used to relieve pressure when the pressure is higher than 25MPa, to prevent the hydraulic system pressure from being too high during the lifting process.

[0043] During the rotation of the mud gun, the rodless chamber bears a significant load (such as the weight of the mud gun itself and the inertial force during rotation). The balance valve 12 is essentially a combination of a one-way throttle valve and a hydraulically controlled check valve. It prevents hydraulic oil from flowing back from the rodless chamber into the oil tank, thus locking the load and preventing the mud gun from falling due to gravity. This ensures that the mud gun remains stably in its current position when it stops rotating, avoiding accidental falls and protecting equipment and personnel safety. For example, in the blast furnace ironmaking process, the mud gun needs to be precisely positioned for operation; the balance valve 12 ensures the accuracy of this positioning.

[0044] By adjusting the opening of the throttle orifice of the balance valve 12, the flow rate of hydraulic oil from the rodless chamber can be controlled, thereby controlling the movement speed of the piston in the rotary cylinder 16, which in turn controls the rotation speed of the mud gun. This allows the rotation speed of the mud gun to be adjusted according to actual production needs, achieving smooth, slow, or fast rotation. For example, when the mud gun approaches the target position, the rotation speed can be reduced by decreasing the opening of the throttle orifice of the balance valve 12, thus improving positioning accuracy.

[0045] In one embodiment, the balance valve 12, the high-pressure ball valve 13, the high-pressure relief valve 14, and the high-pressure hose 15 are sequentially arranged between the second three-position four-way solenoid valve 11 and the rodless chamber of the rotary cylinder 16.

[0046] The balance valve 12, acting as the first line of defense, effectively prevents hydraulic oil from flowing back into the rodless chamber of the rotary cylinder 16. When the mud gun is in a specific position and the solenoid valve is not activated, the one-way valve function of the balance valve 12 prevents oil backflow, locking the load and preventing the mud gun from falling due to gravity or inertia. The high-pressure relief valve 14 serves as a safety redundancy, with a set opening pressure. When the system pressure exceeds this pressure due to abnormal conditions (such as sudden load changes, solenoid valve failure, etc.), the relief valve automatically opens, overflowing excess oil back into the oil tank, preventing excessive system pressure from damaging components such as oil pipes and cylinders.

[0047] With this dual protection, the risk of accidental mud gun movement or equipment damage is greatly reduced, ensuring the safety of personnel and equipment during blast furnace ironmaking and other production processes. For example, during blast furnace shutdown and maintenance, the mud gun needs to remain in a stable position. The cooperation of the balance valve 12 and the high-pressure overflow valve 14 ensures that it will not move due to external forces or pressure fluctuations, avoiding injury to maintenance personnel.

[0048] In one embodiment, the P port of the first three-position four-way solenoid valve 8 is connected to the oil tank via the first oil outlet pipe 10, and the T port of the first three-position four-way solenoid valve 8 is connected to the oil tank via the first oil return pipe 18. The A port of the first three-position four-way solenoid valve 8 is connected to the first end of the second three-position four-way solenoid valve 11, and the B port of the first three-position four-way solenoid valve 8 is connected to the second end of the second three-position four-way solenoid valve 11.

[0049] When the first three-position four-way solenoid valve 8 is in the left working position, hydraulic oil flows from the A valve port of the first three-position four-way solenoid valve 8 to the second three-position four-way solenoid valve 11, so that the second three-position four-way solenoid valve 11 changes from the middle working position to the left working position. At this time, the piston rod of the rotary cylinder 16 extends.

[0050] When the first three-position four-way solenoid valve 8 is in the left working position, hydraulic oil enters from the P valve port and flows through the A valve port to the second three-position four-way solenoid valve 11. This makes the oil flow direction of the entire hydraulic system clear and easy for operators to accurately grasp the working status of the system and the flow direction of the hydraulic oil, reducing the complexity of system operation and the risk of misoperation.

[0051] By connecting the A and B ports of the first three-position four-way solenoid valve 8 to the first and second terminals of the second three-position four-way solenoid valve 11, the working position of the second three-position four-way solenoid valve 11 is controlled. This hierarchical control method allows the system to gradually adjust the flow direction and pressure of hydraulic oil according to different working requirements, thereby controlling the actions of actuators such as the rotary cylinder 16, making the operation of the entire hydraulic system more orderly and controllable.

[0052] The three-position four-way solenoid valve features a fast response speed. When the first three-position four-way solenoid valve 8 switches to the left working position, it can quickly change the flow direction of hydraulic oil, causing the second three-position four-way solenoid valve 11 to respond promptly and change its working position, thereby quickly driving the piston rod of the rotary cylinder 16 to extend. This rapid response capability can improve the working efficiency of the equipment and reduce operation waiting time, making it particularly suitable for production processes with high time requirements.

[0053] In one embodiment, the oil tank is connected to the first end of the second three-position four-way solenoid valve 11 via a fourth oil outlet pipe. A manual pilot valve 1 and a manual switch valve 7 are provided on the fourth oil outlet pipe. The A port of the first three-position four-way solenoid valve 8 is connected to the fourth oil outlet pipe. The electromagnetic switch valve 9 is located between the A port of the first three-position four-way solenoid valve 8 and the fourth oil outlet pipe, and is situated between the manual switch valve 7 and the second three-position four-way solenoid valve 11.

[0054] The oil tank is connected to the second end of the second three-position four-way solenoid valve 11 via the fourth return oil pipe. A manual pilot valve 1 and a manual switch valve 7 are installed on the fourth return oil pipe. The A port of the first three-position four-way solenoid valve 8 is connected to the fourth return oil pipe. The solenoid switch valve 9 is located between the A port of the first three-position four-way solenoid valve 8 and the fourth return oil pipe, and is located between the manual switch valve 7 and the second three-position four-way solenoid valve 11.

[0055] The system is equipped with a manual pilot valve 1, a manual on / off valve 7, and a solenoid on / off valve 9. The manual pilot valve 1 and manual on / off valve 7 are operated manually, allowing operators to directly control the flow and on / off of hydraulic oil according to actual site conditions. The solenoid on / off valve 9 can be remotely controlled via electrical signals. During normal production, the solenoid on / off valve 9 can be used for automated control, improving production efficiency. When the electrical system malfunctions or special operations are required, operators can switch to manual operation mode, using the manual pilot valve 1 and manual on / off valve 7 to control the hydraulic system, ensuring the equipment continues to operate normally and greatly improving the system's operational flexibility.

[0056] The manual and electromagnetic control methods are independent yet complementary, forming a redundant control system. When the electromagnetic control system malfunctions (such as damage to electrical components or interruption of signal transmission), the manual control system can still operate normally, ensuring that the hydraulic system will not completely fail due to a failure of a single control method.

[0057] The manual shut-off valve 7 and the manual pilot valve 1 enable operators to take swift action in emergencies. For example, when an abnormal increase in system pressure or other dangerous conditions are detected, the operator can immediately manually close the shut-off valve to cut off the hydraulic oil supply and prevent the accident from escalating further.

[0058] In one embodiment, the P port of the second three-position four-way solenoid valve 11 is connected to the oil tank via the second oil outlet pipe, and the T port of the second three-position four-way solenoid valve 11 is connected to the oil tank via the second oil return pipe. The A port of the second three-position four-way solenoid valve 11 is connected to the rodless chamber of the rotary cylinder 16, and the B port of the second three-position four-way solenoid valve 11 is connected to the rod chamber of the rotary cylinder 16.

[0059] When the solenoid valve is in a certain working position, connecting valve port P with valve port A and valve port T with valve port B, hydraulic oil enters valve port P from the oil tank through the second outlet pipe, and then enters the rodless chamber of rotary cylinder 16 through valve port A, pushing the piston rod to extend. At the same time, the hydraulic oil in the rod chamber flows back to the oil tank through valve port B, valve port T, and the second return pipe. When the solenoid valve switches to another working position, connecting valve port P with valve port B and valve port T with valve port A, hydraulic oil enters the rod chamber, pushing the piston rod to retract, and the hydraulic oil in the rodless chamber flows back to the oil tank.

[0060] In one embodiment, the P port of the third three-position four-way solenoid valve is connected to the oil tank via the third oil outlet pipe, and the T port of the third three-position four-way solenoid valve is connected to the oil tank via the third oil return pipe. The A port of the third three-position four-way solenoid valve is connected to the rodless chamber of the sludge cylinder 19, and the B port of the third three-position four-way solenoid valve is connected to the rod chamber of the sludge cylinder 19.

[0061] When the solenoid valve is switched to the working position where valve port P is connected to valve port A and valve port T is connected to valve port B, hydraulic oil enters valve port P from the oil tank through the third oil outlet pipe, and then enters the rodless chamber of the sludge-cleaning cylinder 19 through valve port A, pushing the piston rod to extend and realize the sludge-cleaning action; when switched to the working position where valve port P is connected to valve port B and valve port T is connected to valve port A, hydraulic oil enters the rod chamber, pushing the piston rod to retract and complete the return stroke.

[0062] In one embodiment, the mud cannon control system disclosed in this application operates as follows:

[0063] The control system issues a command to switch the first three-position four-way solenoid valve 8 to the left position. At this time, hydraulic oil flows from the oil tank through the first outlet pipe 10 into the P port of the first three-position four-way solenoid valve 8, and then flows out from the A port. The solenoid switch 9 opens, and the hydraulic oil flows through the solenoid switch 9 to the control terminal of the second three-position four-way solenoid valve 11, causing the second three-position four-way solenoid valve 11 to change from the middle position to the left position. Hydraulic oil then flows from the oil tank through the second outlet pipe into the P port of the second three-position four-way solenoid valve 11, and then flows out from the A port, entering the rodless chamber of the rotary cylinder 16, pushing the piston rod to extend and achieving the forward movement of the mud gun. Simultaneously, the hydraulic oil in the rod chamber of the rotary cylinder 16 flows back to the oil tank through the B port, the T port, and the second return pipe.

[0064] The control system issues a command to switch the first three-position four-way solenoid valve 8 to the right-hand operating position. At this time, hydraulic oil enters the P port of the first three-position four-way solenoid valve 8 from the oil tank via the first outlet pipe 10 and flows out from the B port. Through corresponding control logic (which may involve other auxiliary valves or control signals), the second three-position four-way solenoid valve 11 is switched to the right-hand operating position. Hydraulic oil enters the P port of the second three-position four-way solenoid valve 11 from the oil tank via the second outlet pipe, flows out from the B port, and enters the rod chamber of the rotary cylinder 16, pushing the piston rod to retract, thus realizing the backward movement of the mud gun. Simultaneously, the hydraulic oil in the rodless chamber of the rotary cylinder 16 flows back to the oil tank via the A port, the T port, and the second return pipe.

[0065] The action of the sludge-cleaning cylinder 19 is similar to that of the rotary cylinder 16. The control system issues a command to switch the third three-position four-way solenoid valve to the working position where the P valve port is connected to the A valve port and the T valve port is connected to the B valve port. At this time, hydraulic oil enters the P valve port of the third three-position four-way solenoid valve from the oil tank through the third outlet pipe, then flows out from the A valve port and enters the rodless chamber of the sludge-cleaning cylinder 19, pushing the piston rod to extend and realize the sludge-cleaning action. At the same time, the hydraulic oil in the rod chamber of the sludge-cleaning cylinder 19 flows back to the oil tank through the B valve port, the T valve port and the third return oil pipe.

[0066] Through the above embodiments, this application has the following beneficial effects or advantages: The mud gun control system disclosed in this application, through the cooperation of manual switching gate 7 and solenoid valve switching gate, allows operators to select the appropriate control mode according to the actual production situation. In scenarios requiring precise operation, such as equipment debugging and fault handling, manual control can provide higher operational accuracy; while in normal production processes, automatic control can improve production efficiency, reduce manual intervention, and enhance the system's adaptability to different working conditions.

[0067] Except for the mud cannon's rotation, all other movements are controlled by a proportional motor, which employs an electromagnetic clutch structure. The remote control automatically disconnects and resumes manual operation one second after the remote operation stops. This design ensures both the convenience of remote control operation and the ability to quickly switch to manual operation in case of remote control malfunction, guaranteeing the accuracy and safety of the mud cannon's movements and providing reliable assurance for the production process.

[0068] Based on the same inventive concept, a second aspect of this application discloses a mud-beating method for a mud gun control system based on any of the embodiments of the first aspect described above, which includes the following steps:

[0069] Step 1: Close the manual pilot valve 1 and the manual switch valve 7;

[0070] Step 2: By controlling the first three-position four-way solenoid valve 8, the second three-position four-way solenoid valve 11 is controlled, thereby driving the rotary cylinder 16 to work. At the same time, the mud-removing cylinder 19 is controlled by the third three-position four-way solenoid valve.

[0071] Step 3: Repeat step 2 at least twice.

[0072] The mud-removal method disclosed in this embodiment reduces the equipment failure rate through a manual-automatic integrated operation method, greatly reduces the cost of automation transformation, reduces the labor intensity of maintenance personnel, and avoids secondary pollution to the hydraulic system caused by frequent handling of such equipment failures.

[0073] The piston rod of the rotary cylinder 16 extends at least twice. This operation allows the clay gun to make more thorough contact with the taphole and compact the clay. The first extension initially feeds the clay into the taphole, while the second and subsequent extensions further compress and compact the clay, reducing the gap between the clay and the taphole, improving the sealing of the taphole, effectively preventing the leakage of molten iron and slag during ironmaking, and ensuring the safety and stability of ironmaking production.

[0074] In one embodiment, when the mud gun is blocked at the taphole and the pressure in the second oil outlet pipe rises to 21 MPa, the external control sequence valve 17 is opened to its maximum. At this time, the pressure in the rod chamber of the rotary cylinder 16 drops to 0, reaching its maximum pressure. This operation effectively mitigates high-pressure shocks within the system, preventing damage to hydraulic components such as the rotary cylinder 16, oil pipes, and solenoid valves due to excessive pressure. Simultaneously, reducing the rod chamber pressure also reduces deformation and wear of the rotary cylinder 16 under high pressure, extending the equipment's service life and lowering maintenance costs and downtime.

[0075] The mud-discharging pressure is set to 7 MPa to 9 MPa. Appropriate mud-discharging pressure ensures that the mud is evenly distributed within the taphole, preventing insufficient filling due to low pressure and excessive compression that could cause cracks or breakage due to excessive pressure. This guarantees mud-discharging quality and improves the reliability of taphole sealing.

[0076] In one embodiment, the mud-making method further includes the step of: baking the mud cannon for 18 to 22 minutes.

[0077] During storage and transportation, taphole clay may absorb a certain amount of moisture. A heating process of 18 to 22 minutes allows this moisture to evaporate completely. Excessive moisture affects the clay's adhesion and plasticity, reducing its sealing effect. After removing the moisture, the taphole clay can better fill the sprue, forming a tight bond with the surrounding area, improving sealing and preventing leakage of molten iron and slag.

[0078] In one embodiment, the baking time is 20 minutes. This 20-minute baking time, determined through extensive practice and testing, precisely controls the moisture content of the clay within an appropriate range. If the time is too short, the moisture will not be completely removed, and residual moisture will affect the clay's adhesiveness and plasticity, reducing the sealing effect. If the time is too long, the clay may become too loose and brittle due to excessive drying, which is also detrimental to mixing and sealing. The 20-minute time ensures that the clay reaches the optimal moisture content, allowing it to evenly fill the iron nozzle during mixing, adhere tightly to the area around the nozzle, and improve sealing performance.

[0079] In one embodiment, the cannon head is made of cast steel, which often cracks during the lifting process. To solve this problem, the cannon head is heated to 350°C-500°C in a gas fire in a baking trench and then cooled naturally in the air. The purpose is to obtain higher elasticity, yield strength and toughness.

[0080] Residual stresses may exist within cast steel during the casting process, and the grain structure may not be uniform. When the gun head is impacted during firing, these internal defects can lead to stress concentration, making the gun head prone to cracking. Heating at 350℃-500℃ allows atoms to gain sufficient energy for diffusion and rearrangement, eliminating or reducing some of the residual stress. Simultaneously, appropriate heating temperatures can refine or alter the grain morphology of the cast steel, enabling better elastic deformation under stress and thus improving elasticity.

[0081] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention have been clearly and completely described above with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0082] Therefore, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0083] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0084] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0086] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0087] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0088] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A mud cannon control system, characterized in that, include: tank; The mud gun rotation hydraulic circuit includes a manual pilot valve, a manual switch valve, a first three-position four-way solenoid valve, a second three-position four-way solenoid valve, a solenoid switch valve, and a rotation cylinder. One side of the first three-position four-way solenoid valve is connected to the oil tank, and the other side of the first three-position four-way solenoid valve is connected to the control terminal of the second three-position four-way solenoid valve through the solenoid switch valve. The other side of the second three-position four-way solenoid valve is connected to the rotation cylinder. The oil tank is connected to the control terminal of the second three-position four-way solenoid valve after passing through the manual pilot valve and the manual switch valve. The mud-pumping oil circuit includes a third-position four-way solenoid valve and a mud-pumping oil cylinder. One side of the third-position four-way solenoid valve is connected to the mud-pumping oil cylinder, and the other side of the third-position four-way solenoid valve is connected to the oil tank.

2. The mud gun control system according to claim 1, characterized in that, The mud gun rotary oil circuit also includes an external control sequence valve, which is located between the second three-position four-way solenoid valve and the rod chamber of the rotary cylinder.

3. The mud gun control system according to claim 1, characterized in that, The mud gun rotary oil circuit also includes a balance valve, a high-pressure ball valve, a high-pressure relief valve, and a high-pressure hose. The balance valve, the high-pressure ball valve, the high-pressure relief valve, and the high-pressure hose are located between the second three-position four-way solenoid valve and the rodless chamber of the rotary cylinder.

4. The mud gun control system according to claim 3, characterized in that, The balance valve, the high-pressure ball valve, the high-pressure relief valve, and the high-pressure hose are sequentially arranged between the second three-position four-way solenoid valve and the rodless chamber of the rotary cylinder.

5. The mud gun control system according to any one of claims 1 to 4, characterized in that, The P port of the first three-position four-way solenoid valve is connected to the oil tank through the first oil outlet pipe, the T port of the first three-position four-way solenoid valve is connected to the oil tank through the first oil return pipe, the A port of the first three-position four-way solenoid valve is connected to the first end of the second three-position four-way solenoid valve, and the B port of the first three-position four-way solenoid valve is connected to the second end of the second three-position four-way solenoid valve. When the first three-position four-way solenoid valve is in the left working position, hydraulic oil flows from the A valve port of the first three-position four-way solenoid valve to the second three-position four-way solenoid valve, so that the second three-position four-way solenoid valve changes from the middle working position to the left working position. At this time, the piston rod of the rotary cylinder extends.

6. The mud gun control system according to claim 5, characterized in that, The oil tank is connected to the first end of the second three-position four-way solenoid valve through the fourth oil outlet pipe. The manual pilot valve and the manual switch valve are provided on the fourth oil outlet pipe. The A valve port of the first three-position four-way solenoid valve is connected to the fourth oil outlet pipe. The solenoid switch valve is located between the A valve port of the first three-position four-way solenoid valve and the fourth oil outlet pipe, and the solenoid switch valve is located between the manual switch valve and the second three-position four-way solenoid valve. The oil tank is connected to the second end of the second three-position four-way solenoid valve via the fourth return oil pipe. The manual pilot valve and the manual switch valve are provided on the fourth return oil pipe. The A valve port of the first three-position four-way solenoid valve is connected to the fourth return oil pipe. The solenoid switch valve is located between the A valve port of the first three-position four-way solenoid valve and the fourth return oil pipe, and the solenoid switch valve is located between the manual switch valve and the second three-position four-way solenoid valve.

7. The mud gun control system according to any one of claims 1 to 4, characterized in that, The P port of the second three-position four-way solenoid valve is connected to the oil tank through the second oil outlet pipe, the T port of the second three-position four-way solenoid valve is connected to the oil tank through the second oil return pipe, the A port of the second three-position four-way solenoid valve is connected to the rodless chamber of the rotary cylinder, and the B port of the second three-position four-way solenoid valve is connected to the rod chamber of the rotary cylinder.

8. The mud gun control system according to any one of claims 1 to 4, characterized in that, The P port of the third three-position four-way solenoid valve is connected to the oil tank through the third oil outlet pipe, the T port of the third three-position four-way solenoid valve is connected to the oil tank through the third oil return pipe, the A port of the third three-position four-way solenoid valve is connected to the rodless chamber of the sludge cylinder, and the B port of the third three-position four-way solenoid valve is connected to the rod chamber of the sludge cylinder.

9. A mud-moving method based on the mud gun control system according to any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Close the manual pilot valve and the manual switch valve; Step 2: By controlling the first three-position four-way solenoid valve, the second three-position four-way solenoid valve is controlled, thereby driving the rotary cylinder to work. At the same time, the mud-removing cylinder is controlled by the third three-position four-way solenoid valve. Step 3: Repeat step 2 at least twice.

10. The mud-removing method according to claim 9, characterized in that, In step two, when the mud gun is blocked on the iron taphole and the pressure of the second oil outlet pipe rises to 21 MPa, the external control sequence valve is opened to the maximum. At this time, the pressure of the rod chamber of the rotary cylinder is reduced to 0; the mud discharge pressure is set to 7 MPa to 9 MPa.

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