High-precision self-adaptive cold-rolled strip steel uncoiling and threading device hydraulic system

Abstract

The utility model relates to a kind of high-precision self-adapting cold-rolled strip steel uncoiling and threading device hydraulic system, including swing oil cylinder, proportional reversing valve and proportional pressure reducing valve, interface one and interface two on proportional reversing valve are communicated and interface three and interface four are communicated, or interface one and interface three are communicated and interface two and interface four are communicated, proportional pressure reducing valve is equipped with interface five and interface six;Interface one is communicated with the one end of oil supply pipeline, interface two is communicated with the rodless cavity of swing oil cylinder by pipeline, interface three is communicated with the rod cavity of swing oil cylinder by pipeline, and the pipeline communicated between interface three and swing oil cylinder is equipped with plug-in check valve;Interface four is communicated with the one end of oil return pipeline, interface five and interface six are communicated with the pipeline communicated between interface three and swing oil cylinder by pipeline respectively.The high-precision hydraulic system provided by the utility model can avoid fatigue damage of equipment fittings caused by inertia and impact force when equipment suddenly stops, and can reduce labor cost and safety hazard.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically to a high-precision adaptive hydraulic system for cold-rolled strip uncoiling and threading device. Background Technology

[0002] With the rapid development of the metallurgical industry, its industrial structure is constantly transforming towards higher efficiency and automation. To adapt to this need, technicians need to continuously improve and innovate the design of rolling mill control hydraulic systems to meet the industry's demand for efficient and automated control.

[0003] In cold rolling mills and pickling units, the uncoiling and threading device serves as a crucial connection between the uncoiler and subsequent auxiliary equipment, playing a vital role in the entire production line. Controlling the oscillating traction speed and force is extremely important. Failure to precisely control these parameters can lead to frequent strip breakage and strip damage, severely impacting unit efficiency, increasing labor costs, and creating safety hazards. Utility Model Content

[0004] This invention provides a high-precision adaptive hydraulic system for cold-rolled strip uncoiling and threading devices, aiming to solve the problems in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A high-precision adaptive hydraulic system for cold-rolled strip uncoiling and threading device includes a swing cylinder, a proportional directional valve, and a proportional pressure reducing valve. The proportional directional valve is provided with interface 1, interface 2, interface 3, and interface 4. Interface 1 is connected to interface 2 and interface 3 is connected to interface 4, or interface 1 is connected to interface 3 and interface 2 is connected to interface 4. The proportional pressure reducing valve is provided with interface 5 and interface 6 that are interconnected.

[0007] Interface 1 is connected to one end of the oil supply line, and the other end of the oil supply line is used to connect to the oil tank; Interface 2 is connected to the rodless chamber of the swing cylinder through a pipeline, Interface 3 is connected to the rod chamber of the swing cylinder through a pipeline, and a cartridge-type check valve is provided on the pipeline connecting Interface 3 and the swing cylinder; Interface 4 is connected to one end of the return oil line, and the other end of the return oil line is used to connect to the oil tank.

[0008] Interface five and interface six are respectively connected to the corresponding ends of the cartridge-type check valve via pipelines that connect interface three and the swing cylinder.

[0009] The beneficial effects of this utility model are as follows: During operation, when the swing cylinder extends, the oil is sent to the rodless chamber of the swing cylinder through the oil supply pipeline and the proportional directional valve. The oil in the rodless chamber of the swing cylinder pushes the telescopic rod of the swing cylinder to extend so as to perform the corresponding operation. At this time, the oil in the rod chamber of the swing cylinder is sent back to the oil tank through the proportional directional valve and the return oil pipeline.

[0010] When the swing cylinder retracts, the oil is sent to the rod chamber of the swing cylinder through the oil supply line, proportional directional valve and proportional pressure reducing valve. The oil in the rod chamber of the swing cylinder pushes the telescopic rod of the swing cylinder to retract, so as to perform the corresponding operation. At this time, the oil in the rodless chamber of the swing cylinder is sent back to the oil tank through the proportional directional valve and the return oil line.

[0011] During this process, the pressure in the rod chamber of the swing cylinder is adjusted by a proportional pressure reducing valve. The system automatically calculates the swing traction force required for unwinding based on a current signal of 0~600mA given according to the corresponding plate thickness and width.

[0012] The hydraulic system provided by this utility model is a high-precision hydraulic system that can prevent fatigue damage to equipment parts caused by inertia and impact when the equipment stops suddenly, and can also reduce labor costs and safety hazards.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the pipeline connecting the second interface and the rodless chamber of the swing cylinder is connected to the return oil pipeline through an overflow pipeline, and a cartridge-type overflow valve is fixedly installed on the overflow pipeline.

[0015] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. Here, the cartridge relief valve is used as a safety valve to avoid excessive pressure in the hydraulic system, thereby preventing the set pressure from being too high and causing adverse effects on the strip steel when the uncoiling and threading swing device swings to the uncoiling position.

[0016] Furthermore, the pipeline connecting the interface three and the rod chamber of the swing cylinder is connected to the return oil pipeline through the overflow pipeline two, and a cartridge-type overflow valve two is fixedly installed on the overflow pipeline two.

[0017] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. Here, the cartridge relief valve is used as a safety valve to avoid excessive pressure in the hydraulic system, thereby preventing the set pressure from being too high and causing adverse effects on the strip steel when the uncoiling and threading swing device swings to the uncoiling position.

[0018] Furthermore, the proportional pressure reducing valve is also provided with an interface seven, which is connected to the channel between the interface five and the interface six, and the interface seven is connected to the return oil pipeline through a pipeline.

[0019] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. Excess oil in the proportional pressure reducing valve is sent back to the oil tank through interface seven and the corresponding pipeline and return oil pipeline.

[0020] Furthermore, it also includes a control oil circuit, wherein the spring interface on the proportional pressure reducing valve is connected to one end of the control oil circuit via a pipeline, and the other end of the control oil circuit is used to connect to the oil tank.

[0021] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. During operation, the pressure in the rod chamber of the swing cylinder can be adjusted by using the proportional pressure reducing valve. At the same time, the excess oil in the proportional pressure reducing valve can be returned to the oil tank through the control oil circuit, saving oil and reducing costs.

[0022] Furthermore, a T-port check valve is provided at the other end of the return oil pipeline, and a Y-port check valve is provided at the other end of the control oil circuit.

[0023] The advantages of adopting the above-mentioned further scheme are that it has a simple structure and reasonable design. It uses a T-port check valve to control the flow direction of oil in the return oil line, and at the same time uses a Y-port check valve to control the flow direction of oil in the control oil line, thus avoiding oil backflow.

[0024] Furthermore, a hydraulic control check valve 2 is fixedly installed on the pipeline connecting the interface 3 and the rod chamber of the swing cylinder. The hydraulic control check valve 2 is provided with an oil port 3 and an oil port 4 that are respectively connected to the valve chamber. The oil port 3 is connected to the pipeline connecting the interface 2 and the rod chamber of the swing cylinder through a pipeline, and the oil port 4 is connected to the control oil circuit through a pipeline.

[0025] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The hydraulic control check valve is used to form a pressure holding circuit. The hydraulic control check valve has excellent sealing and pressure holding effects, and can stably and reliably keep the swing cylinder at any position.

[0026] Furthermore, a hydraulic control check valve is fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder. The hydraulic control check valve is provided with an oil port 1 and an oil port 2 that are respectively connected to the valve chamber. The oil port 1 is connected to the pipeline connecting the third interface and the rod chamber of the swing cylinder through a pipeline, and the oil port 2 is connected to the control oil circuit through a pipeline.

[0027] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The hydraulic control check valve 2 and hydraulic control check valve 1 form a pressure holding circuit. The hydraulic control check valve has excellent sealing and pressure holding effects, and can stably and reliably keep the swing cylinder at any position.

[0028] Furthermore, a pilot-operated pressure reducing valve is fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder. The pilot-operated pressure reducing valve is located between the hydraulic control check valve and the proportional directional valve. The spring interface on the pilot-operated pressure reducing valve is connected to the control oil circuit through a pipeline.

[0029] The advantages of adopting the above-mentioned further solution are that the structure is simple and the design is reasonable. The working pressure of the swing cylinder extension is controlled by a combination of pilot-operated pressure reducing valve and cartridge relief valve, which has higher accuracy.

[0030] Furthermore, a P-port high-pressure ball valve is provided at one end of the oil supply pipeline.

[0031] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and uses a P-port high-pressure ball valve to control the flow of oil in the oil supply pipeline, making operation convenient. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the proportional directional valve in this utility model;

[0034] Figure 3 This is a schematic diagram of the proportional pressure reducing valve in this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. P-port high-pressure ball valve; 2. T-port check valve; 3. Y-port check valve; 4. Proportional directional valve; 5. Swing cylinder; 6. Proportional pressure reducing valve; 7. Pilot-operated pressure reducing valve; 8. Pressure testing connector; 9. Cartridge check valve; 10.1. Hydraulic control check valve one; 10.2. Hydraulic control check valve two; 11. Pressure testing hose; 12. Pressure relay; 13.1. Cartridge relief valve one; 13.2. Cartridge relief valve two; 14. Interface high-pressure ball valve; 15. Oil supply line; 16. Oil return line; 17. Control oil circuit. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should be noted that, 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 based on the specific circumstances.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] like Figures 1 to 3 As shown, this embodiment provides a high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system, including a swing cylinder 5, a proportional directional valve 4, and a proportional pressure reducing valve 6. The proportional directional valve 4 is provided with interface 1, interface 2, interface 3, and interface 4. Interface 1 is connected to interface 2 and interface 3 is connected to interface 4, or interface 1 is connected to interface 3 and interface 2 is connected to interface 4. The proportional pressure reducing valve 6 is provided with interface 5 and interface 6 that are interconnected.

[0043] Interface 1 is connected to one end of the oil supply line 15, and the other end of the oil supply line 15 is used to connect to the oil tank; Interface 2 is connected to the rodless chamber of the swing cylinder 5 through a pipeline, Interface 3 is connected to the rod chamber of the swing cylinder 5 through a pipeline, and a cartridge-type check valve 9 is provided on the pipeline connecting Interface 3 and the swing cylinder 5; Interface 4 is connected to one end of the return oil line 16, and the other end of the return oil line 16 is used to connect to the oil tank.

[0044] Interface 5 and Interface 6 are respectively connected to the parts corresponding to both ends of the cartridge-type check valve 9 through the pipelines connecting Interface 3 and the swing cylinder 5.

[0045] During operation, when the swing cylinder 5 extends, the oil is sent to the rodless chamber of the swing cylinder 5 through the oil supply line 15 and the proportional directional valve 4. The oil in the rodless chamber of the swing cylinder 5 pushes the extension rod of the swing cylinder 5 to extend to perform the corresponding operation. At this time, the oil in the rod chamber of the swing cylinder 5 is sent back to the oil tank through the proportional directional valve 4 and the return oil line 16.

[0046] When the swing cylinder 5 retracts, the oil is sent to the rod chamber of the swing cylinder 5 through the oil supply line 15, the proportional directional valve 4 and the proportional pressure reducing valve 6. The oil in the rod chamber of the swing cylinder 5 pushes the telescopic rod of the swing cylinder 5 to retract, so as to perform the corresponding operation. At this time, the oil in the rodless chamber of the swing cylinder 5 is sent back to the oil tank through the proportional directional valve 4 and the return oil line 16.

[0047] During this process, the pressure in the rod chamber of the swing cylinder 5 is adjusted by the proportional pressure reducing valve 6. The system automatically calculates the swing traction force required for unwinding based on a current signal of 0~600mA given according to the corresponding plate thickness and width.

[0048] The hydraulic system provided in this embodiment is a high-precision hydraulic system that can prevent fatigue damage to equipment components caused by inertia and impact when the equipment stops suddenly, and can also reduce labor costs and safety hazards.

[0049] Example 2

[0050] Based on Embodiment 1, in this embodiment, the pipeline connecting the second interface and the rodless chamber of the swing cylinder 5 is connected to the return oil pipeline 16 through an overflow pipeline, and a cartridge-type overflow valve 13.1 is fixedly installed on the overflow pipeline.

[0051] The scheme has a simple structure and reasonable design. Here, the cartridge-type relief valve 13.1 is used as a safety valve to avoid excessive pressure in the hydraulic system, thereby preventing the set pressure from being too high and causing adverse effects on the strip steel when the uncoiling and threading swing device swings to the uncoiling position.

[0052] Example 3

[0053] Based on the above embodiments, in this embodiment, the pipeline connecting the interface three and the rod chamber of the swing cylinder 5 is connected to the return oil pipeline 16 through the overflow pipeline two, and a cartridge-type overflow valve 13.2 is fixedly installed on the overflow pipeline two.

[0054] The scheme has a simple structure and reasonable design. Here, the cartridge-type relief valve 213.2 is used as a safety valve to avoid excessive pressure in the hydraulic system, thereby preventing the set pressure from being too high and causing adverse effects on the strip steel when the uncoiling and threading swing device swings to the uncoiling position.

[0055] Example 4

[0056] Based on the above embodiments, in this embodiment, the proportional pressure reducing valve 6 is further provided with an interface seven, which is connected to the channel between the interface five and the interface six, and the interface seven is connected to the return oil pipeline 16 through a pipeline.

[0057] The scheme has a simple structure and reasonable design. Excess oil in the proportional pressure reducing valve 6 is sent back to the oil tank through the interface 7 and the corresponding pipeline and return oil pipeline 16.

[0058] Example 5

[0059] Based on the above embodiments, this embodiment also includes a control oil circuit 17. The spring interface on the proportional pressure reducing valve 6 is connected to one end of the control oil circuit 17 through a pipeline, and the other end of the control oil circuit 17 is used to connect to the oil tank.

[0060] The scheme has a simple structure and reasonable design. During operation, the pressure in the rod chamber of the swing cylinder 5 can be adjusted by the proportional pressure reducing valve 6. At the same time, the excess oil in the proportional pressure reducing valve 6 can be returned to the oil tank through the control oil circuit 17, saving oil and reducing costs.

[0061] Example 6

[0062] Based on Example 5, in this example, a T-port check valve 2 is provided at the other end of the return oil pipeline 16, and a Y-port check valve 3 is provided at the other end of the control oil pipeline 17.

[0063] The scheme has a simple structure and reasonable design. It uses a T-port check valve 2 to control the flow direction of oil in the return oil line 16, and at the same time uses a Y-port check valve 3 to control the flow direction of oil in the control oil line 17 to prevent oil backflow.

[0064] Example 7

[0065] Based on any one of Embodiments 5 to 8, in this embodiment, a hydraulic check valve 2 10.2 is fixedly installed on the pipeline connecting the interface 3 and the rod chamber of the swing cylinder 5. The hydraulic check valve 2 10.2 is provided with an oil port 3 and an oil port 4 respectively connected to the valve chamber. The oil port 3 is connected to the pipeline connecting the interface 2 and the rod chamber of the swing cylinder 5 through a pipeline, and the oil port 4 is connected to the control oil circuit 17 through a pipeline.

[0066] The scheme has a simple structure and reasonable design. It uses a hydraulic control check valve 10.2 to form a pressure holding circuit. The hydraulic control check valve has excellent sealing and pressure holding effects, and can stably and reliably keep the swing cylinder in any position.

[0067] Example 8

[0068] Based on any one of Embodiments 5 to 7, in this embodiment, a hydraulic control check valve 10.1 is fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder 5. The hydraulic control check valve 10.1 is provided with an oil port 1 and an oil port 2 that are respectively connected to the valve chamber. The oil port 1 is connected to the pipeline connecting the third interface and the rod chamber of the swing cylinder 5 through a pipeline, and the oil port 2 is connected to the control oil circuit 17 through a pipeline.

[0069] The scheme has a simple structure and reasonable design. It uses hydraulic control check valve 2 10.2 and hydraulic control check valve 1 10.1 to form a pressure holding circuit. The hydraulic control check valve has excellent sealing and pressure holding effects, and can stably and reliably keep the swing cylinder at any position.

[0070] Example 9

[0071] Based on Example 8, in this example, a pilot-operated pressure reducing valve 7 is also fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder 5. The pilot-operated pressure reducing valve 7 is located between the hydraulic control check valve 10.1 and the proportional directional valve 4. The spring interface on the pilot-operated pressure reducing valve 7 is connected to the control oil circuit 17 through a pipeline.

[0072] The scheme has a simple structure and reasonable design. The working pressure of the swing cylinder 5 extension is controlled by a combination of pilot-operated pressure reducing valve 7 and cartridge relief valve 13, which has higher accuracy.

[0073] Example 10

[0074] Based on the above embodiments, in this embodiment, a P-port high-pressure ball valve 1 is provided on one end of the oil supply pipeline 15.

[0075] The scheme has a simple structure and reasonable design. It uses the P-port high-pressure ball valve 1 to control the flow of oil in the oil supply pipeline 15, which is convenient to operate.

[0076] Preferably, in this embodiment, two high-pressure ball valves 14 are fixedly installed on the pipeline connecting the second interface of the proportional directional valve 4 to the rodless chamber of the swing cylinder 5 and the pipeline connecting the third interface of the proportional directional valve 4 to the rodless chamber of the swing cylinder 5, respectively. The two high-pressure ball valves 14 are located between the swing cylinder 5 and the hydraulic control check valve 2 10.2 and the hydraulic control check valve 1 10.1, respectively.

[0077] Preferably, in this embodiment, a pressure relay 12 is connected to the pipeline connecting interface two on the proportional directional valve 4 and the rodless chamber of the swing cylinder 5, and the pipeline connecting interface three on the proportional directional valve 4 and the rodless chamber of the swing cylinder 5 is connected to the pipeline connecting interface two on the proportional directional valve 4 and the rodless chamber of the swing cylinder 5 via the pressure relay 12. The pressure relay 12 is used to monitor the pressure when the swing cylinder 5 extends, serving as an interlock signal when the unwinding and threading swing device swings to the unwinding position. This signal only serves a monitoring function and does not participate in the interlocking.

[0078] In addition, a pressure relay 12 is connected to the pipeline connecting the cartridge-type check valve 9 and the swing cylinder 5, and the pipeline connecting the proportional pressure reducing valve 6. This pressure relay 12 works in conjunction with the proportional pressure reducing valve 6 in pressure control mode, maintaining a fixed force in the rod chamber of the swing cylinder 5. When the pressure relay 12 detects a pressure deviation, it changes the magnitude of the command signal input to the proportional pressure reducing valve 6, resulting in a corresponding change in the valve core opening, thus achieving real-time force adjustment. During normal batch continuous production, the output pressure of the proportional pressure reducing valve 6 will automatically adjust according to the strip width and thickness.

[0079] Preferably, in this embodiment, pressure testing connectors 8 are respectively provided on the pipeline connecting the second interface on the proportional directional valve 4 and the rodless chamber of the swing cylinder 5, and on the pipeline connecting the third interface on the proportional directional valve 4 and the rodless chamber of the swing cylinder 5 and the corresponding pressure relay 12.

[0080] In addition, pressure test connectors 8 are also provided on the corresponding pipelines connected to the remaining pressure test connectors 8.

[0081] Meanwhile, pressure testing connectors 8 are connected to the oil supply line 15, the oil return line 16, and the oil control line 17, respectively. The installation of these pressure testing connectors 8 facilitates the measurement of the pressure in the corresponding lines, enabling appropriate measures to be taken, thus ensuring safer system operation.

[0082] Preferably, in this embodiment, each pressure testing connector 8 is connected to the corresponding pipeline via a pressure testing hose 11.

[0083] The working principle of this utility model is as follows:

[0084] During operation, when the swing cylinder 5 extends, the oil is sent to the rodless chamber of the swing cylinder 5 through the oil supply line 15 and the proportional directional valve 4. The oil in the rodless chamber of the swing cylinder 5 pushes the extension rod of the swing cylinder 5 to extend to perform the corresponding operation. At this time, the oil in the rod chamber of the swing cylinder 5 is sent back to the oil tank through the proportional directional valve 4 and the return oil line 16.

[0085] When the swing cylinder 5 retracts, the oil is sent to the rod chamber of the swing cylinder 5 through the oil supply line 15, the proportional directional valve 4 and the proportional pressure reducing valve 6. The oil in the rod chamber of the swing cylinder 5 pushes the telescopic rod of the swing cylinder 5 to retract, so as to perform the corresponding operation. At this time, the oil in the rodless chamber of the swing cylinder 5 is sent back to the oil tank through the proportional directional valve 4 and the return oil line 16.

[0086] During this process, the pressure in the rod chamber of the swing cylinder 5 is adjusted by the proportional pressure reducing valve 6. The system automatically calculates the swing traction force required for unwinding based on a current signal of 0~600mA given according to the corresponding plate thickness and width.

[0087] The principle and process of this invention in actual production are as follows:

[0088] The uncoiling and threading device is located at the uncoiler outlet and is used for the uncoiling operation of the uncoiler. When the uncoiler performs the threading operation, the clamping cylinder of the uncoiler guide plate retracts to open the clamping plate, and the frame lifting cylinder raises the clamping frame to the highest position. At the same time, the frame swing cylinder drives the frame to swing and approach the steel coil. The strip head enters the clamping guide plate, the clamping cylinder of the clamping guide plate extends, clamps the strip head, lifts it, and guides the strip into the pinch roller. The upper pinch roller presses down and clamps the strip. The frame swing cylinder 5 swings, driving the strip out and swinging towards the pinch straightener. The swing cylinder 5 is controlled by the proportional speed through the proportional reversing valve 4. The swing traction speed is greater than the uncoiling speed. The traction tension is adjusted by the proportional pressure reducing valve 6. This ensures that the uncoiling and threading device has enough force to pull up the head of the steel coil, while also ensuring that the steel coil does not cause too much force to damage the equipment when entering the uncoiler.

[0089] A set of uncoiling and threading swing devices is controlled by a hydraulic cylinder. Its lifting and lowering are controlled by the retraction and extension of its swing hydraulic cylinder 5. The reversing unit of this circuit is a high-frequency response proportional directional valve 4. The output flow of the proportional directional valve is controlled by changing the current signal, precisely and smoothly controlling the reversing of the swing cylinder 5. The magnitude of the input signal to the proportional directional valve 4 is matched with the uncoiling linear speed of the uncoiler, ensuring that the swing traction speed is greater than the uncoiling speed. The system automatically adjusts the input signal of the proportional directional valve 4 according to the coil diameter. The corresponding pressure relay 12 is used to monitor the pressure when the swing cylinder 5 extends, serving as an interlock signal when the uncoiling and threading swing device swings to the uncoiling position. This signal only plays a monitoring role and does not participate in the interlocking. The cartridge-type relief valve 13 is used as a safety valve to prevent excessively high set pressure from adversely affecting the strip steel when the uncoiling and threading swing device swings to the uncoiling position. Two hydraulically controlled check valves form a pressure-holding circuit. The hydraulically controlled check valves have excellent sealing and pressure-holding effects, ensuring stable and reliable holding of the swing cylinder 5 at any position.

[0090] The working pressure of the extended swing cylinder 5 is controlled by a combination of a pilot-operated pressure reducing valve 7 and a cartridge-type relief valve 13. The set pressure of the cartridge-type relief valve 13 is 40 bar higher than that of the pilot-operated pressure reducing valve 7, serving as a safety valve. When the piston rod of the swing cylinder 5 retracts and the uncoiler lifts, the pressure in the rod chamber is adjusted by the proportional pressure reducing valve 6. The system automatically calculates the swing traction force required for uncoiling based on a 0~600mA current signal given according to the corresponding strip thickness and width. The pressure relay 12 works in conjunction with the proportional pressure reducing valve 6 as a pressure control mode to maintain a fixed force in the rod chamber of the swing cylinder 5. When the pressure relay 12 detects a pressure deviation, it changes the magnitude of the input command signal to the proportional pressure reducing valve 6, resulting in a corresponding change in the valve core opening, thus achieving real-time force adjustment. During normal batch continuous production, the output pressure of the proportional pressure reducing valve 6 will automatically adjust according to the strip width and thickness. The cartridge-type relief valve 13 is used as a safety valve to prevent excessively high set pressure from adversely affecting the swing traction force on the strip; meeting the needs of efficient and automated control of the production line. It improves threading efficiency by 30% and reduces material damage by 20%.

[0091] The purpose of this invention is to address the aforementioned issues by introducing a high-efficiency, automated, and highly precise adaptive hydraulic system for a cold-rolled strip uncoiling and threading device. The system automatically calculates the required swing traction force and speed based on the corresponding strip thickness and width, increasing the unit's working efficiency by 30%, reducing strip damage by 20%, and decreasing labor costs and safety hazards. Simultaneously, the high-precision hydraulic system prevents fatigue damage to equipment components caused by inertia and impact forces when the equipment suddenly stops.

[0092] It should be noted that the appendix Figure 1 The dashed box in the image has no other substantial meaning; it simply indicates that the inside of the box is a single valve block.

[0093] Moreover, attached Figure 1 The dashed oil path in the diagram represents the control oil path.

[0094] In addition, all electronic components involved in this utility model adopt existing technology, and all the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is existing technology.

[0095] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0096] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0097] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision adaptive hydraulic system for cold-rolled strip uncoiling and threading device, characterized in that: It includes a swing cylinder (5), a proportional directional valve (4) and a proportional pressure reducing valve (6). The proportional directional valve (4) is provided with interface 1, interface 2, interface 3 and interface 4. Interface 1 is connected to interface 2 and interface 3 is connected to interface 4, or interface 1 is connected to interface 3 and interface 2 is connected to interface 4. The proportional pressure reducing valve (6) is provided with interface 5 and interface 6 that are connected to each other. The first interface is connected to one end of the oil supply line (15), and the other end of the oil supply line (15) is used to connect to the oil tank; the second interface is connected to the rodless chamber of the swing cylinder (5) through a pipeline, the third interface is connected to the rod chamber of the swing cylinder (5) through a pipeline, and a cartridge-type check valve (9) is provided on the pipeline connecting the third interface and the swing cylinder (5); the fourth interface is connected to one end of the return oil line (16), and the other end of the return oil line (16) is used to connect to the oil tank; Interface 5 and Interface 6 are respectively connected to the parts corresponding to both ends of the cartridge-type check valve (9) through the pipeline connecting Interface 3 and the swing cylinder (5).

2. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to claim 1, characterized in that: The pipeline connecting the second interface and the rodless chamber of the swing cylinder (5) is connected to the return oil pipeline (16) through an overflow pipeline, and a cartridge overflow valve (13.1) is fixedly installed on the overflow pipeline.

3. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to claim 1, characterized in that: The pipeline connecting the interface three and the rod chamber of the swing cylinder (5) is connected to the return oil pipeline (16) through the overflow pipeline two, and a cartridge overflow valve two (13.2) is fixedly installed on the overflow pipeline two.

4. The hydraulic system for the high-precision adaptive cold-rolled strip uncoiling and threading device according to claim 1, characterized in that: The proportional pressure reducing valve (6) is also provided with an interface seven, which is connected to the channel between the interface five and the interface six, and the interface seven is connected to the return oil pipeline (16) through a pipeline.

5. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to any one of claims 1-4, characterized in that: It also includes a control oil circuit (17), the spring interface on the proportional pressure reducing valve (6) is connected to one end of the control oil circuit (17) through a pipeline, and the other end of the control oil circuit (17) is used to connect to the oil tank.

6. The hydraulic system for the high-precision adaptive cold-rolled strip uncoiling and threading device according to claim 5, characterized in that: The other end of the return oil line (16) is provided with a T-port check valve (2), and the other end of the control oil line (17) is provided with a Y-port check valve (3).

7. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to claim 5, characterized in that: A hydraulic control check valve 2 (10.2) is fixedly installed on the pipeline connecting the interface 3 and the rod chamber of the swing cylinder (5). The hydraulic control check valve 2 (10.2) is provided with an oil port 3 and an oil port 4 that are respectively connected to the valve chamber. The oil port 3 is connected to the pipeline connecting the interface 2 and the rod chamber of the swing cylinder (5) through a pipeline, and the oil port 4 is connected to the control oil circuit (17) through a pipeline.

8. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to claim 5, characterized in that: A hydraulic control check valve (10.1) is fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder (5). The hydraulic control check valve (10.1) is provided with an oil port 1 and an oil port 2 that are respectively connected to the valve chamber. The oil port 1 is connected to the pipeline connecting the third interface and the rod chamber of the swing cylinder (5) through a pipeline. The oil port 2 is connected to the control oil circuit (17) through a pipeline.

9. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to claim 8, characterized in that: A pilot-operated pressure reducing valve (7) is also fixedly installed on the pipeline connecting the second interface to the rodless chamber of the swing cylinder (5). The pilot-operated pressure reducing valve (7) is located between the hydraulic control check valve (10.1) and the proportional directional valve (4). The spring interface on the pilot-operated pressure reducing valve (7) is connected to the control oil circuit (17) through the pipeline.

10. The high-precision adaptive cold-rolled strip uncoiling and threading device hydraulic system according to any one of claims 1-4, characterized in that: A P-port high-pressure ball valve (1) is provided at one end of the oil supply pipeline (15).

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