A new type of rotary heat conveyor hydraulic system

Abstract

This utility model provides a novel hydraulic system for a rotary heat conveyor, belonging to the technical field of hydraulic equipment. It includes a first pipe, one end of which is connected to an oil tank, and the other end to the rod-side port of a hydraulic cylinder, for supplying hydraulic oil to the rod-side port to retract the piston rod. A second pipe, one end of which is connected to an oil tank, and the other end to the rodless-side port of the hydraulic cylinder, for supplying hydraulic oil to the rodless-side port to extend the piston rod. An electromagnetic directional valve is located adjacent to both the first and second pipes, allowing for cross-flow of hydraulic oil when supplying it to the hydraulic cylinder. This utility model allows for real-time adjustment of the hydraulic cylinder's operating speed through pressure regulation via the electromagnetic directional valve in conjunction with a pressure reducing valve. Furthermore, the electromagnetic directional valve enables bidirectional precise control, allowing seamless switching between the extension and retraction actions of the hydraulic cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, specifically to a novel hydraulic system for a rotary hot conveyor. Background Technology

[0002] In the steelmaking process, the rotary hot conveyor is a key piece of equipment between continuous casting and rolling processes, and the operational stability of its hydraulic system directly affects production continuity and equipment lifespan. Traditional rotary hot conveyor hydraulic systems suffer from the following technical defects:

[0003] Insufficient operational flexibility: Traditional systems can only achieve unidirectional control of hydraulic cylinder movements, and cannot quickly switch between extension / retraction actions, making it difficult to adapt to the continuous production needs of multi-specification steel billets. Utility Model Content

[0004] In view of this, the present invention provides a novel hydraulic system for a rotary heat conveyor. The present invention can adjust the pressure by using an electromagnetic directional valve in conjunction with a pressure reducing valve, thereby realizing real-time adjustment of the hydraulic cylinder's running speed. Furthermore, the electromagnetic directional valve can also provide bidirectional precise control to seamlessly switch the extension / retraction actions of the hydraulic cylinder.

[0005] To solve the above-mentioned technical problems, this utility model provides a novel hydraulic system for a rotary hot conveyor, including a first pipe, one end of which is connected to an oil tank and the other end of which is connected to the oil port of the rod chamber of a hydraulic cylinder, for supplying hydraulic oil to the oil port of the rod chamber of the hydraulic cylinder to cause the piston rod of the hydraulic cylinder to retract.

[0006] The second pipe has one end connected to the oil tank and the other end connected to the rodless chamber port of the hydraulic cylinder. It is used to supply hydraulic oil to the rodless chamber port of the hydraulic cylinder so that the piston rod of the hydraulic cylinder can extend.

[0007] The electromagnetic directional valve has both the first and second pipes adjacent to it, which are used to deliver hydraulic oil to the hydraulic cylinder, allowing the hydraulic oil to flow in a cross-flow manner.

[0008] The pressure relief valve is also connected to a return pipe, which is connected to the oil tank, so that the hydraulic oil flowing out after pressure relief can be returned and reused.

[0009] Both the first and second pipelines are equipped with a one-way shut-off valve, which is located between the solenoid directional valve and the hydraulic cylinder, and is used to regulate the flow rate of hydraulic oil in the first or second pipeline.

[0010] Both the first and second pipelines are equipped with hydraulic control check valves, which are used to prevent the hydraulic oil in the first or second pipeline from flowing back.

[0011] A third pipeline is also provided corresponding to the first pipeline. Both ends of the third pipeline are connected to the first pipeline through tee pipes. One tee pipe is located between the oil tank and the solenoid directional valve on the first pipeline, and the other tee pipe is located between the hydraulic cylinder and the solenoid directional valve on the first pipeline. A manual directional valve is also connected to the third pipeline for manually controlling the piston rod of the hydraulic cylinder to retract.

[0012] A fourth pipeline is also provided corresponding to the second pipeline. Both ends of the fourth pipeline are connected to the second pipeline through tee pipes. One tee pipe is located between the oil tank and the solenoid directional valve on the second pipeline, and the other tee pipe is located between the hydraulic cylinder and the solenoid directional valve on the second pipeline. A manual directional valve is also connected to the fourth pipeline for manually controlling the piston rod of the hydraulic cylinder to extend.

[0013] A first high-pressure ball valve is provided on the first pipe and / or the second pipe. The first high-pressure ball valve is located at the end of the first pipe or the second pipe near the oil tank. The first high-pressure ball valve is used to block the hydraulic oil in the first pipe or the second pipe, so as to avoid the hydraulic oil in the pipe flowing out during system maintenance, thus avoiding waste and pollution.

[0014] A second high-pressure ball valve is provided on the first pipe and / or the second pipe. The second high-pressure ball valve is located at the end of the first pipe or the second pipe near the hydraulic cylinder. The second high-pressure ball valve is used to block the hydraulic oil in the first pipe or the second pipe, so as to avoid the hydraulic oil in the pipe flowing out during system maintenance, thus avoiding waste and pollution.

[0015] The third high-pressure ball valve is installed on the third pipeline, and the third ball valve is located at the discharge end of the manual directional valve.

[0016] The fourth pipeline is equipped with a third high-pressure ball valve, which is located at the discharge end of the manual directional valve.

[0017] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. Two-way precise control and seamless action switching: The design incorporates a cross-flow hydraulic oil system via an electromagnetic directional valve, enabling rapid switching between the extension and retraction of the hydraulic cylinders and overcoming the limitations of traditional unidirectional control. Combined with the pressure regulating function of a pressure reducing valve, the operating speed can be adjusted in real time to meet the precision requirements of continuous production of multi-specification steel billets, significantly improving production continuity.

[0018] 2. Pressure stability and energy recycling: The parallel-connected pressure reducing valves stabilize the hydraulic oil pressure in the pipeline, preventing equipment shocks caused by pressure fluctuations and extending the service life of hydraulic components. The design of its pressure relief port connecting to the oil tank via a return pipeline allows for the recycling of the pressure-relieved hydraulic oil, reducing energy consumption and aligning with green manufacturing principles.

[0019] 3. Dual protection of flow rate regulation and backflow prevention: The combined application of a one-way shut-off valve and a hydraulically controlled one-way valve can not only precisely control the extension and retraction speed of the piston rod by adjusting the shut-off area to adapt to different working conditions, but also prevent hydraulic oil backflow, ensuring that the system maintains positioning accuracy when stopped or in a faulty state, and avoiding safety hazards caused by accidental movement of equipment.

[0020] 4. Manual / Automatic Dual-Mode Redundant Control: The addition of manual directional valves to the third and fourth pipelines creates a dual-redundancy system with both electromagnetic and manual control. In the event of a failure in the automatic control system, the hydraulic cylinders can be manually operated, ensuring the production line's emergency operation capability and improving system reliability.

[0021] 5. Ease of maintenance and environmental friendliness: The first and second high-pressure ball valves are located at opposite ends of the pipeline, allowing for rapid interruption of hydraulic oil flow during maintenance, preventing waste and environmental pollution caused by oil leaks. The third high-pressure ball valve further enhances the isolation function of the manual control branch, ensuring that local maintenance does not affect the overall system operation and reducing downtime maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a novel rotary heat conveyor hydraulic system according to this utility model; Figure 2 This is a schematic diagram of the electromagnetic reversing valve of this utility model; Figure 3 This is a schematic diagram of the manual directional valve of this utility model.

[0023] Explanation of reference numerals in the attached figures: 1. Oil tank; 2. Hydraulic cylinder; 3. First pipeline; 4. Second pipeline; 5. Solenoid directional valve; 6. Pressure relief valve; 7. Return pipeline; 8. One-way shut-off valve; 9. Hydraulic control check valve; 10. Third pipeline; 11. Manual directional valve; 12. Fourth pipeline; 13. First high-pressure ball valve; 14. Second high-pressure ball valve; 15. Third high-pressure ball valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-3The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] This utility model provides a novel hydraulic system for a rotary hot conveyor, such as... Figure 1 , 2 As shown: It includes an oil tank 1 and a hydraulic cylinder 2. The hydraulic cylinder 2 has a rod chamber oil port and a rodless chamber oil port. The oil tank 1 is connected to a first pipe 3. The other end of the first pipe 3 is connected to the rod chamber oil port of the hydraulic cylinder 2. The hydraulic oil in the oil tank 1 enters the rod chamber oil port of the hydraulic cylinder 2 through the first pipe 3, which enables the piston rod of the hydraulic cylinder 2 to retract. The oil tank 1 is also equipped with a second pipe 4. The other end of the second pipe 4 is connected to the oil port of the rodless chamber of the hydraulic cylinder 2. The hydraulic oil in the oil tank 1 enters the oil port of the rodless chamber of the hydraulic cylinder 2 through the second pipe 4, which enables the piston rod of the hydraulic cylinder 2 to extend and work. A solenoid directional valve 5 is also provided corresponding to the first pipe 3 and the second pipe 4. Both the first pipe 3 and the second pipe 4 are connected to the solenoid directional valve 5, which is used to make the hydraulic oil flow cross-flow when supplying hydraulic oil to the hydraulic cylinder 2, so that the extension / retraction action of the hydraulic cylinder 2 can be quickly switched.

[0026] Furthermore, pressure reducing valves are also provided corresponding to the first pipe 3 and the second pipe 4. The pressure reducing valves are connected in parallel with the first pipe 3 and the second pipe 4. The pressure threshold of the pressure reducing valves can be set. When the pressure in the first pipe 3 or the second pipe 4 exceeds the set threshold, the hydraulic oil will be discharged through the pressure relief port of the pressure reducing valve. This can stabilize the hydraulic oil pressure in the first pipe 3 and the second pipe 4, thereby making the extension or retraction of the piston rod of the hydraulic cylinder 2 more stable.

[0027] Preferably, the pressure relief port of the pressure reducing valve is also connected to a return pipe 7, which is connected to the oil tank 1, so that the pressure relief hydraulic oil can be recycled and energy consumption is reduced.

[0028] Furthermore, a one-way throttle valve is provided on both the first pipe 3 and the second pipe 4. Each one-way shut-off valve 8 is located between the electromagnetic reversing valve 5 and the hydraulic cylinder 2. The one-way shut-off valve 8 can connect the electromagnetic reversing valve 5 and the hydraulic cylinder 2, thereby cooperating with the pressure reducing valve to further stabilize the stability of the piston rod extension and retraction of the hydraulic cylinder 2.

[0029] Furthermore, a hydraulic control check valve 9 is provided on both the first pipe 3 and the second pipe 4. The hydraulic control check valve 9 is located between the one-way shut-off valve 8 and the same hydraulic cylinder 2. The hydraulic control check valve 9 is used to prevent the hydraulic oil in the first pipe 3 or the second pipe 4 from flowing back, so as to ensure that the system maintains positioning accuracy when it is stopped or in a fault state. That is, when the first pipe 3 or the second pipe 4 resumes operation, the piston rod of the hydraulic cylinder 2 can immediately perform the corresponding extension and retraction behavior.

[0030] It is worth mentioning that a third pipe 10 is also provided corresponding to the first pipe 3, such as... Figure 1 , 3 As shown: Both ends of the third pipe 10 are connected to the first pipe 3 via tee pipes. One tee pipe is located between the oil tank 1 and the solenoid directional valve 5 on the first pipe 3, and the other tee pipe is located between the hydraulic cylinder 2 and the hydraulic check valve 9 on the first pipe 3. When the solenoid directional valve 5 cannot be used normally, the hydraulic oil in the oil tank 1 can still enter the third pipe 10 through the first pipe 3. The hydraulic oil in the third pipe 10 can then enter the manual directional valve 11. The hydraulic oil passing through the manual directional valve 11 will indirectly flow back into the first pipe 3, so that the hydraulic oil in the first pipe 3 can flow into the rod chamber of the hydraulic cylinder 2, and thus the piston rod of the hydraulic cylinder 2 can retract.

[0031] Correspondingly, a fourth pipe 12 is also provided for the second pipe 4. Both ends of the fourth pipe 12 are connected to the second pipe 4 through three-way pipes. One three-way pipe is located between the oil tank 1 and the solenoid directional valve 5 on the second pipe 4, and the other three-way pipe is located between the hydraulic cylinder 2 and the hydraulic control check valve 9 on the second pipe 4. When the solenoid directional valve 5 fails to function properly, the hydraulic oil in the oil tank 1 can enter the fourth pipe 12 through the second pipe 4. The hydraulic oil flowing in the fourth pipe 12 can then flow through the manual directional valve 11, and then flow back into the second pipe 4. Finally, it flows into the rodless chamber port of the hydraulic cylinder 2, and the piston rod of the hydraulic cylinder 2 can extend. That is, when the solenoid directional valve 5 fails to function properly, the hydraulic cylinder 2 can be manually operated through the manual directional valve 11, ensuring the emergency operation capability of the production line and improving the system reliability.

[0032] Preferably, a first high-pressure ball valve 13 is provided on the first pipe 3 and the second pipe 4, and the first high-pressure ball valve 13 is located at the end of the first pipe 3 or the second pipe 4 near the oil tank 1; a second high-pressure ball valve 14 is provided on the first pipe 3 and the second pipe 4, and the second high-pressure ball valve 14 is located at the end of the first pipe 3 or the second pipe 4 near the hydraulic cylinder 2; a third high-pressure ball valve 15 is provided on both the third pipe 10 and the fourth pipe 12, and the third ball valve is located at the discharge end of the manual directional valve 11; the three sets of high-pressure ball valves can respectively cut off the hydraulic oil in the first pipe 3 or the second pipe 4 or the third pipe 10 or the fourth pipe 12, thereby preventing the hydraulic oil from flowing. In this way, when maintaining the hydraulic oil flow pipeline, the hydraulic oil can be prevented from flowing out of the pipeline, affecting the working environment and causing hydraulic oil waste.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A novel hydraulic system for a rotary hot conveyor, comprising an oil tank and a hydraulic cylinder, characterized in that, Also includes: The first pipe (3) is connected at one end to the oil tank (1) and at the other end to the rod chamber oil port of the hydraulic cylinder (2), and is used to supply hydraulic oil to the rod chamber oil port of the hydraulic cylinder (2) so that the piston rod of the hydraulic cylinder (2) can retract. The second pipe (4) is connected at one end to the oil tank (1) and at the other end to the rodless chamber oil port of the hydraulic cylinder (2), and is used to supply hydraulic oil to the rodless chamber oil port of the hydraulic cylinder (2) so that the piston rod of the hydraulic cylinder (2) can extend. The electromagnetic reversing valve (5) is adjacent to both the first pipe (3) and the second pipe (4). When the electromagnetic reversing valve (5) is used to supply hydraulic oil to the hydraulic cylinder (2), the hydraulic oil flows cross-flow. A pressure reducing valve is also connected in parallel between the first pipe (3) and the second pipe (4). The pressure reducing valve is used to stabilize the hydraulic oil flow pressure in the first pipe (3) or the second pipe (4).

2. The novel rotary hot conveyor hydraulic system as described in claim 1, characterized in that, The pressure relief valve is also connected to a return pipe (7), which is connected to the oil tank (1).

3. The novel rotary hot conveyor hydraulic system as described in claim 2, characterized in that, Both the first pipe (3) and the second pipe (4) are equipped with a one-way shut-off valve (8). The one-way shut-off valve (8) is located between the electromagnetic reversing valve (5) and the hydraulic cylinder (2) and is used to adjust the flow rate of hydraulic oil in the first pipe (3) or the second pipe (4).

4. The novel rotary hot conveyor hydraulic system as described in claim 3, characterized in that, Both the first pipe (3) and the second pipe (4) are equipped with hydraulic control check valves (9), which are used to prevent the hydraulic oil in the first pipe (3) or the second pipe (4) from flowing back.

5. The novel rotary hot conveyor hydraulic system as described in claim 4, characterized in that, A third pipe (10) is also provided corresponding to the first pipe (3). Both ends of the third pipe (10) are connected to the first pipe (3) through a three-way pipe. One of the three-way pipes is located between the oil tank (1) and the solenoid directional valve (5) on the first pipe (3), and the other three-way pipe is located between the hydraulic cylinder (2) and the solenoid directional valve (5) on the first pipe (3). A manual directional valve (11) is also connected to the third pipe (10) for manually controlling the piston rod of the hydraulic cylinder (2) to retract.

6. The novel rotary hot conveyor hydraulic system as described in claim 5, characterized in that, A fourth pipe (12) is also provided corresponding to the second pipe (4). Both ends of the fourth pipe (12) are connected to the second pipe (4) through a three-way pipe. One of the three-way pipes is located between the oil tank (1) and the solenoid directional valve (5) on the second pipe (4), and the other three-way pipe is located between the hydraulic cylinder (2) and the solenoid directional valve (5) on the second pipe (4). A manual directional valve (11) is also connected to the fourth pipe (12) for manually controlling the piston rod of the hydraulic cylinder (2) to extend.

7. The novel rotary hot conveyor hydraulic system as described in claim 6, characterized in that, A first high-pressure ball valve (13) is provided on the first pipe (3) and / or the second pipe (4), and the first high-pressure ball valve (13) is located at the end of the first pipe (3) or the second pipe (4) near the oil tank (1).

8. The novel rotary hot conveyor hydraulic system as described in claim 7, characterized in that, A second high-pressure ball valve (14) is provided on the first pipe (3) and / or the second pipe (4), and the second high-pressure ball valve (14) is located at one end of the first pipe (3) or the second pipe (4) near the hydraulic cylinder (2).

9. The novel rotary hot conveyor hydraulic system as described in claim 8, characterized in that, The third high-pressure ball valve (15) is provided on the third pipe (10), and the third high-pressure ball valve is located at the discharge end of the manual reversing valve (11).

10. A novel rotary hot conveyor hydraulic system as described in claim 9, characterized in that, The fourth pipe (12) is equipped with a third high-pressure ball valve (15), which is located at the discharge end of the manual reversing valve (11).

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