Rolling car hydraulic system and temper mill rolling car

Abstract

The invention provides an upcoiler hydraulic system and a temper mill upcoiler, and relates to the technical field of hydraulic systems, the upcoiler hydraulic system comprises a hydraulic cylinder, a first oil pipe, a second oil pipe, an oil supply pipe, an oil return pipe and a hydraulic regulation and control mechanism, and the hydraulic cylinder comprises a rodless cavity and a rod cavity; the first oil pipe is communicated with the rodless cavity and is provided with a first control valve group; the second oil pipe is communicated with the rod cavity and is provided with a second control valve group; the oil supply pipe is used for communicating with an oil tank and provided with a hydraulic pump set and a third control valve set. The oil return pipe is used for communicating with the oil tank and provided with a fourth control valve set. And the hydraulic regulation and control mechanism controllably communicates with the first oil pipe, the second oil pipe, the oil supply pipe and the oil return pipe and is used for regulating the pressure of the rodless cavity and / or the rod cavity. Different pressure gears can be flexibly switched according to actual working conditions, so that the requirements of the coiling vehicle in various working environments are met.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic systems, and in particular to a coiling car hydraulic system and a leveling machine coiling car. Background Art

[0002] In the production of cold-rolled strip, a single-stand leveling mill is required to level the cold-rolled and annealed steel coils to improve the mechanical properties of the strip and improve the surface quality, flatness and surface roughness of the strip. The leveling of the steel coil by a single-stand leveling mill generally includes the following steps: the steel coil is lifted to the center height of the uncoiler drum by the coiler, and then the coiler is moved horizontally to achieve coiling. This process requires the coiler to have a high lifting capacity and precise lateral positioning to ensure that the steel coil can be placed on the uncoiler drum smoothly. Then, the uncoiler drum drives the steel coil to rotate and the strip is leveled by the leveling mill. After leveling, the tail coil on the uncoiler drum needs to be removed to facilitate the next coiling. This process also requires precise control to ensure that the tail coil can be removed safely and efficiently. The existing hydraulic control system has the following problems when implementing the above functions: Since the hydraulic system of the coiler has different pressure requirements for the hydraulic cylinder during the coiling and unloading processes, the existing hydraulic system has a relatively slow response speed and cannot adapt to the frequent coiling and unloading requirements during the production process in a timely manner, resulting in low production efficiency. In addition, it is difficult for the existing hydraulic system to accurately control and switch the pressure of the hydraulic cylinder in the two processes, thereby reducing the control accuracy and making it difficult to achieve fast and smooth coiling and unloading. Therefore, how to achieve accurate coiling of steel coils and efficient unloading of tail coils and improve production efficiency and safety has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a coiling car hydraulic system and a leveling machine coiling car.

[0004] The above-mentioned object of the present invention can be achieved by adopting the following technical solutions. The present invention provides a hydraulic system for a winding car, comprising:

[0005] A hydraulic cylinder, the hydraulic cylinder comprising a rodless chamber and a rod chamber;

[0006] a first oil pipe, the first oil pipe being connected to the rodless chamber and having a first control valve group disposed on the first oil pipe;

[0007] a second oil pipe, the second oil pipe being connected to the rod chamber and provided with a second control valve group;

[0008] An oil supply pipe, the oil supply pipe is used to communicate with the oil tank, and a hydraulic pump group and a third control valve group are arranged on the oil supply pipe;

[0009] An oil return pipe, the oil return pipe is used to communicate with the oil tank, and a fourth control valve group is provided on the oil return pipe;

[0010] A hydraulic control mechanism, wherein the hydraulic control mechanism controllably connects the first oil pipe, the second oil pipe, the oil supply pipe and the oil return pipe, and the hydraulic control mechanism is used to adjust the pressure of the rodless chamber and / or the rod chamber.

[0011] In a preferred embodiment of the present invention, the hydraulic control mechanism includes a first solenoid reversing valve, the oil inlet of the first solenoid reversing valve is connected to the oil supply pipe, the oil return port of the first solenoid reversing valve is connected to the oil return pipe, and the two working oil ports of the first solenoid reversing valve are respectively connected to the first oil pipe and the second oil pipe.

[0012] In a preferred embodiment of the present invention, along the direction from the hydraulic control mechanism to the hydraulic cylinder, the first control valve group includes a first hydraulically controlled one-way valve, a first throttle valve, a first overflow valve, and a first manual valve which are sequentially arranged on the first oil pipe.

[0013] In a preferred embodiment of the present invention, the overflow port of the first overflow valve is connected to the oil return pipe and is placed upstream of the fourth control valve group.

[0014] In a preferred embodiment of the present invention, a first hose section is provided on the first oil pipe, and the first hose section is arranged between the first manual valve and the hydraulic cylinder.

[0015] In a preferred embodiment of the present invention, the reeling car hydraulic system also includes a first pressure measuring joint arranged on the first oil pipe, the first pressure measuring joint is located between the first overflow valve and the first manual valve, and the first pressure measuring joint is used to connect a first hydraulic sensor.

[0016] In a preferred embodiment of the present invention, along the direction from the hydraulic control mechanism to the hydraulic cylinder, the second control valve group includes a second hydraulically controlled one-way valve, a second throttle valve, and a second manual valve which are sequentially arranged on the second oil pipe.

[0017] In a preferred embodiment of the present invention, a second hose section is provided on the second oil pipe, and the second hose section is arranged between the second manual valve and the hydraulic cylinder.

[0018] In a preferred embodiment of the present invention, the reeling car hydraulic system also includes a second pressure measuring joint arranged on the second oil pipe, the second pressure measuring joint is located between the second throttle valve and the second manual valve, and the second pressure measuring joint is used to connect a second hydraulic sensor.

[0019] In a preferred embodiment of the present invention, the third control valve group includes a pressure reducing valve arranged on the oil supply pipe, and the pressure reducing valve is located between the hydraulic control mechanism and the hydraulic pump group;

[0020] The hydraulic system of the winding car further comprises a pressure reducing oil pipe, which is used to connect the back pressure port of the pressure reducing valve and the oil tank, and a fifth control valve group is arranged on the pressure reducing oil pipe.

[0021] In a preferred embodiment of the present invention, the winding car hydraulic system also includes a third pressure measuring joint arranged on the pressure reducing oil pipe, the third pressure measuring joint is located between the pressure reducing valve and the fifth control valve group, and the third pressure measuring joint is used to connect a third hydraulic sensor.

[0022] In a preferred embodiment of the present invention, along the direction from the pressure reducing valve to the oil tank, the fifth control valve group includes a second electromagnetic reversing valve and a pressure regulating valve sequentially arranged on the pressure reducing oil pipe, the oil inlet of the second electromagnetic reversing valve is connected to the oil tank through the pressure regulating valve, and the two working oil ports of the second electromagnetic reversing valve are controllably connected to the back pressure port of the pressure reducing valve;

[0023] The hydraulic system of the winding car further includes a pressure reducing branch pipe arranged in parallel with the pressure regulating valve, and the pressure reducing branch pipe is connected with the oil return port of the second electromagnetic reversing valve and the pressure reducing oil pipe.

[0024] In a preferred embodiment of the present invention, the hydraulic system of the winding car also includes a fourth pressure measuring joint arranged on the oil supply pipe, the fourth pressure measuring joint is located between the second solenoid reversing valve and the pressure reducing valve, and the fourth pressure measuring joint is used to connect a fourth hydraulic sensor.

[0025] In a preferred embodiment of the present invention, the fourth control valve group includes an oil return one-way valve arranged on the oil return pipe.

[0026] In a preferred embodiment of the present invention, the third control valve group includes a first proportional pressure reducing valve arranged on the oil supply pipe, and the oil outlet of the first proportional pressure reducing valve is connected to the oil return pipe and is placed upstream of the fourth control valve group.

[0027] In a preferred embodiment of the present invention, the hydraulic control mechanism includes a second proportional pressure reducing valve; the first control valve group includes a first hydraulically controlled one-way valve, a first overflow valve, and a first manual valve sequentially arranged on the first oil pipe, and the overflow port of the first overflow valve is connected to the return oil pipe and is placed upstream of the fourth control valve group; the second control valve group includes a second hydraulically controlled one-way valve and a first manual valve sequentially arranged on the second oil pipe.

[0028] In a preferred embodiment of the present invention, the hydraulic system of the winding car further includes a displacement sensor disposed on the hydraulic cylinder, and the displacement sensor is used to detect the driving stroke of the hydraulic cylinder.

[0029] The present invention also provides a leveling machine coiler, comprising the above-mentioned coiler hydraulic system.

[0030] The technical solution of the present invention has the following significant beneficial effects:

[0031] When the hydraulic system of the coiling car of the present invention is used, the first oil pipe, the second oil pipe, the oil supply pipe and the oil return pipe are controllably connected through the hydraulic control mechanism, and the hydraulic control mechanism can cooperate with the first control valve group, the second control valve group, the third control valve group and the fourth control valve group to control the pressure of the rodless chamber of the hydraulic cylinder and the rod chamber of the hydraulic cylinder. Through the coordinated work of the hydraulic control mechanism and each control valve group, the pressure of the rodless chamber and the rod chamber of the hydraulic cylinder can be accurately controlled, thereby realizing a two-speed pressure regulation function. That is, during the coiling process, the hydraulic system of the coiling car can provide a large pressure to ensure that the steel coil rises smoothly; and when unloading the coil, the hydraulic system of the coiling car switches to a small pressure to prevent damage to the equipment and the steel coil, and ensure safe and efficient operation. The present invention can flexibly switch different pressure gears according to actual working conditions, has better response speed and control accuracy, so that it can timely adapt to the frequent coiling and unloading needs in the production process, improve production efficiency, and help reduce unnecessary energy loss, thereby playing a role in energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0034] Figure 1 It is a structural schematic diagram of a first embodiment of the hydraulic system of the winding car of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a second embodiment of the hydraulic system of the winding car of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a third embodiment of the hydraulic system of the winding car of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a fourth embodiment of the hydraulic system of the winding car according to the present invention.

[0038] Reference numerals in the above drawings:

[0039] 10. Fuel tank;

[0040] 100, hydraulic cylinder; 110, rodless chamber; 120, rod chamber;

[0041] 200, first oil pipe; 211, first hydraulically controlled one-way valve; 212, first throttle valve; 213, first overflow valve; 214, first manual valve; 220, first hose section; 230, first pressure measuring joint; 240, first hydraulic sensor;

[0042] 300, second oil pipe; 311, second hydraulically controlled one-way valve; 312, second throttle valve; 313, second manual valve; 320, second hose section; 330, second pressure measuring joint;

[0043] 400, oil supply pipe; 411, pressure reducing valve; 412, first proportional pressure reducing valve; 420, hydraulic pump group; 430, fourth pressure measuring joint;

[0044] 500, oil return pipe; 511, oil return check valve;

[0045] 610, first electromagnetic reversing valve; 620, second proportional pressure reducing valve;

[0046] 700, pressure reducing oil pipe; 711, second electromagnetic reversing valve; 712, pressure regulating valve; 720, third pressure measuring joint; 730, pressure reducing branch pipe;

[0047] 800. Displacement sensor. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Implementation Method 1

[0050] Please refer to Figures 1 to 4As shown, in an embodiment of the present invention, a hydraulic system for a winding car is provided, which includes a hydraulic cylinder 100, a first oil pipe 200, a second oil pipe 300, an oil supply pipe 400, an oil return pipe 500 and a hydraulic control mechanism. The hydraulic cylinder 100 includes a rodless chamber 110 and a rod chamber 120; the first oil pipe 200 is connected to the rodless chamber 110, and a first control valve group is provided on the first oil pipe 200; the second oil pipe 300 is connected to the rod chamber 120, and the second oil pipe 400 is connected to the rod chamber 120. A second control valve group is provided on 300; the oil supply pipe 400 is used to connect to the oil tank 10, and a hydraulic pump group 420 and a third control valve group are provided on the oil supply pipe 400; the return oil pipe 500 is used to connect to the oil tank 10, and a fourth control valve group is provided on the return oil pipe 500; the hydraulic control mechanism can controllably connect the first oil pipe 200, the second oil pipe 300, the oil supply pipe 400 and the return oil pipe 500, and the hydraulic control mechanism is used to adjust the pressure of the rodless chamber 110 and / or the rod chamber 120.

[0051] When the hydraulic system of the winding car is in use, the first oil pipe 200, the second oil pipe 300, the oil supply pipe 400 and the oil return pipe 500 are controllably connected through the hydraulic control mechanism, and the hydraulic control mechanism can cooperate with the first control valve group, the second control valve group, the third control valve group and the fourth control valve group to control the pressure of the rodless chamber 110 of the hydraulic cylinder 100 and the rod chamber 120 of the hydraulic cylinder 100.

[0052] Through the coordinated work of the hydraulic control mechanism and each control valve group, the pressure of the rodless chamber 110 and the rod chamber 120 of the hydraulic cylinder 100 can be accurately controlled, thereby realizing a two-speed pressure adjustment function. That is, during the coiling process, the coiling car hydraulic system can provide high pressure to ensure the smooth rise of the steel coil; while during the unloading process, the coiling car hydraulic system switches to low pressure to prevent damage to the equipment and the steel coil, ensuring safe and efficient operation.

[0053] The present invention can flexibly switch different pressure gears according to actual working conditions, has better response speed and control accuracy, so as to timely adapt to the frequent winding and unwinding needs in the production process, improve production efficiency, and help reduce unnecessary energy loss, thereby playing a role in energy saving and environmental protection.

[0054] In an embodiment of the present invention, Figure 1 In the embodiment shown, the hydraulic control mechanism includes a first solenoid reversing valve 610, the oil inlet of the first solenoid reversing valve 610 is connected to the oil supply pipe 400, the oil return port of the first solenoid reversing valve 610 is connected to the oil return pipe 500, and the two working oil ports of the first solenoid reversing valve 610 are respectively connected to the first oil pipe 200 and the second oil pipe 300.

[0055] The first electromagnetic reversing valve 610 makes the connection state between the oil supply pipe 400, the oil return pipe 500, the first oil pipe 200 and the second oil pipe 300 more flexible and controllable. According to different operation requirements, the operator can quickly switch the oil circuit direction through the electromagnetic signal, thereby realizing the pressure adjustment of the rodless chamber 110 and the rod chamber 120. For example, during the winding process, the first electromagnetic reversing valve 610 guides the high-pressure oil to the rodless chamber 110, and switches to the rod chamber 120 to return the oil during the unwinding process.

[0056] Moreover, since the first solenoid reversing valve 610 can accurately control the direction of oil flow, thereby ensuring that the pressure of the rodless chamber 110 and the rod chamber 120 of the hydraulic cylinder 100 is always within the set range, it helps to improve the response speed and stability of the system, especially when the pressure gear needs to be frequently switched, thereby ensuring the continuity and safety of the operation.

[0057] The designer can adjust the specific model of the first electromagnetic reversing valve 610 according to the use requirements, and no specific limitation is made here. Preferably, the first electromagnetic reversing valve 610 is a three-position four-way valve. Specifically, when a of the three-position four-way valve is energized, the left chamber of the electromagnetic valve is connected, and when b is energized, the right chamber of the electromagnetic valve is connected. When both a and b are not energized, the electromagnetic valve is unloaded.

[0058] In an embodiment of the present invention, Figure 1 In the illustrated embodiment, along the direction from the hydraulic control mechanism to the hydraulic cylinder 100 , the first control valve group includes a first hydraulically controlled one-way valve 211 , a first throttle valve 212 , a first overflow valve 213 , and a first manual valve 214 which are sequentially arranged on the first oil pipe 200 .

[0059] The first hydraulically controlled one-way valve 211 ensures that the oil can only flow in one direction, preventing the oil from flowing back in the event of system pressure fluctuations or abnormal conditions. By adjusting the opening of the first throttle valve 212, the oil flow entering the rodless chamber 110 can be accurately controlled, thereby achieving fine adjustment of the hydraulic cylinder 100. When the pressure of the first oil pipe 200 exceeds the set value, the first overflow valve 213 will automatically open to drain the excess oil back to the oil tank 10, preventing the hydraulic system of the winding car from being damaged due to overpressure.

[0060] The first manual valve 214 provides a manual operation option, so that the operator can directly intervene in the oil circuit state when necessary. For example, during the hydraulic system failure or debugging stage of the winding car, the oil circuit can be cut off or connected through the manual valve to facilitate maintenance and repair.

[0061] In the embodiment of the present invention, the overflow port of the first overflow valve 213 is connected to the oil return pipe 500 and is placed upstream of the fourth control valve group. When the system pressure exceeds the set value, the first overflow valve 213 will automatically open and drain the excess oil directly into the oil return pipe 500 through the overflow port.

[0062] In an embodiment of the present invention, Figure 1 In the illustrated embodiment, a first hose section 220 is provided on the first oil pipe 200 , and the first hose section 220 is disposed between the first manual valve 214 and the hydraulic cylinder 100 .

[0063] By arranging the first hose section 220 on the first oil pipe 200 and placing it between the first manual valve 214 and the hydraulic cylinder 100, the first hose section 220 has good flexibility and elasticity, and can effectively absorb the vibration and impact generated by the operation of the hydraulic cylinder 100. In addition, since the first hose section 220 has a certain degree of elasticity, especially in the process of frequent expansion and contraction of the hydraulic cylinder 100, the first hose section 220 can be flexibly adjusted to avoid the stress concentration problem that may be caused by the hard pipe connection.

[0064] In an embodiment of the present invention, the reeling car hydraulic system further includes a first pressure measuring joint 230 disposed on the first oil pipe 200 , the first pressure measuring joint 230 is located between the first overflow valve 213 and the first manual valve 214 , and the first pressure measuring joint 230 is used to connect to the first hydraulic sensor 240 .

[0065] The first hydraulic sensor 240 can monitor the pressure changes in the first oil pipe 200 in real time. Once the pressure exceeds the set threshold, the hydraulic system can quickly take measures, such as activating a protection mechanism or sounding an alarm, thereby effectively preventing potential risks caused by excessive pressure.

[0066] Furthermore, the first hydraulic sensor 240 can also monitor the pressure of the rodless chamber 110 of the hydraulic cylinder 100 in real time. When the pressure exceeds the preset pressure during unloading, such as 1.5 MPa, an alarm signal can be issued to avoid damage to the uncoiler drum.

[0067] In an embodiment of the present invention, Figure 1 In the illustrated embodiment, along the direction from the hydraulic control mechanism to the hydraulic cylinder 100 , the second control valve group includes a second hydraulically controlled one-way valve 311 , a second throttle valve 312 , and a second manual valve 313 which are sequentially arranged on the second oil pipe 300 .

[0068] The second hydraulically controlled one-way valve 311 ensures that the oil can only flow in one direction to prevent the oil from flowing back in the event of system pressure fluctuations or abnormal conditions. By adjusting the opening of the second throttle valve 312, the oil flow entering the rod chamber 120 can be accurately controlled, thereby achieving fine adjustment of the hydraulic cylinder 100.

[0069] In addition, a manual operation option is provided through the second manual valve 313, so that the operator can directly intervene in the oil circuit state when necessary. For example, in the hydraulic system failure or debugging stage of the winding car, the oil circuit can be cut off or connected through the manual valve to facilitate maintenance and repair.

[0070] In the embodiment of the present invention, a second hose section 320 is provided on the second oil pipe 300 , and the second hose section 320 is arranged between the second manual valve 313 and the hydraulic cylinder 100 .

[0071] By arranging the second hose section 320 on the second oil pipe 300 and placing it between the second manual valve 313 and the hydraulic cylinder 100 , the second hose section 320 has good flexibility and elasticity and can effectively absorb vibration and impact generated by the hydraulic cylinder 100 when working.

[0072] Furthermore, since the second hose section 320 has a certain degree of elasticity, especially during the frequent extension and retraction of the hydraulic cylinder 100, the second hose section 320 can be flexibly adjusted to avoid the stress concentration problem that may be caused by the hard pipe connection.

[0073] In an embodiment of the present invention, the reeling car hydraulic system further comprises a second pressure measuring joint 330 disposed on the second oil pipe 300, the second pressure measuring joint 330 is located between the second throttle valve 312 and the second manual valve 313, and the second pressure measuring joint 330 is used to connect the second hydraulic sensor.

[0074] The second pressure measuring joint 330 and the second hydraulic sensor can be used to monitor the pressure changes in the second oil pipe 300 in real time. Once the pressure exceeds the set threshold, the hydraulic system can quickly take measures, such as activating a protection mechanism or sounding an alarm, thereby effectively preventing potential risks caused by excessive pressure.

[0075] In a possible embodiment of the present invention, Figure 1 In the embodiment shown, the third control valve group includes a pressure reducing valve 411 arranged on the oil supply pipe 400, and the pressure reducing valve 411 is located between the hydraulic control mechanism and the hydraulic pump group 420; the hydraulic system of the winding car also includes a pressure reducing oil pipe 700, and the pressure reducing oil pipe 700 is used to connect the back pressure port of the pressure reducing valve 411 and the oil tank 10, and the fifth control valve group is provided on the pressure reducing oil pipe 700.

[0076] The regulating function of the pressure reducing valve 411 can effectively prevent the high pressure output by the hydraulic pump group 420 from directly impacting the hydraulic control mechanism. Even if the hydraulic pump group 420 has an abnormally high pressure, the pressure reducing valve 411 can respond quickly to ensure that the system pressure is always within a controllable range, thereby improving the overall safety of the system.

[0077] Furthermore, the pressure reducing valve 411 not only regulates the pressure, but also optimizes the flow distribution from the hydraulic pump group 420 to the hydraulic control mechanism. This flow balance helps to improve the efficiency of the entire hydraulic system, reduce energy loss, and extend the service life of the equipment.

[0078] Furthermore, the back pressure port of the pressure reducing valve 411 is connected to the oil tank 10 via the pressure reducing oil pipe 700, which simplifies the oil return path and reduces unnecessary pipeline connections, thereby reducing the complexity of the system and improving the oil return efficiency.

[0079] Furthermore, a fifth control valve group is provided on the pressure reducing oil pipe 700, and the back pressure of the pressure reducing valve 411 can be flexibly adjusted according to the actual working conditions. For example, under different pressure gears, the return oil resistance can be accurately controlled by the fifth control valve group, thereby optimizing the working state of the pressure reducing valve 411 and ensuring that it is always in the optimal pressure range.

[0080] In an embodiment of the present invention, the winding car hydraulic system further includes a third pressure measuring joint 720 disposed on the pressure reducing oil pipe 700, the third pressure measuring joint 720 is located between the pressure reducing valve 411 and the fifth control valve group, and the third pressure measuring joint 720 is used to connect the third hydraulic sensor.

[0081] The third pressure measuring joint 720 and the third hydraulic sensor can cooperate to monitor the pressure changes in the pressure reducing oil pipe 700 in real time. Once the pressure exceeds the set threshold, the hydraulic system can quickly take measures, such as activating a protection mechanism or sounding an alarm, thereby effectively preventing potential risks caused by excessive pressure.

[0082] In an embodiment of the present invention, Figure 1 In the embodiment shown, along the direction from the pressure reducing valve 411 to the oil tank 10, the fifth control valve group includes a second electromagnetic reversing valve 711 and a pressure regulating valve 712 which are sequentially arranged on the pressure reducing oil pipe 700, the oil inlet of the second electromagnetic reversing valve 711 is connected to the oil tank 10 through the pressure regulating valve 712, and the two working oil ports of the second electromagnetic reversing valve 711 are controllably connected to the back pressure port of the pressure reducing valve 411; the hydraulic system of the winding car also includes a pressure reducing branch pipe 730 which is arranged in parallel with the pressure regulating valve 712, and the pressure reducing branch pipe 730 is connected to the oil return port of the second electromagnetic reversing valve 711 and the pressure reducing oil pipe 700.

[0083] The designer can adjust the specific model of the second electromagnetic reversing valve 711 according to the use requirements, and no specific limitation is made here. Preferably, the second electromagnetic reversing valve 711 is a two-position four-way valve. Specifically, a of the two-position four-way valve is energized to connect the left chamber of the electromagnetic valve, and b is energized to connect the right chamber of the electromagnetic valve.

[0084] When the winding car is winding up, a of the second electromagnetic reversing valve 711 is energized and b of the first electromagnetic reversing valve 610 is energized. At this time, the back pressure port of the pressure reducing valve 411 is connected to the pressure regulating valve 712 through the left chamber of the second electromagnetic reversing valve 711 and flows back to the oil tank 10 through the pressure reducing oil pipe 700. The maximum pressure at the outlet of the pressure reducing valve 411 is the sum of the set pressure P3 of the pressure reducing valve 411 and the set pressure P4 of the pressure regulating valve 712.

[0085] When the upper coil car unloads the tail coil, b of the second solenoid reversing valve 711 is energized and a of the first solenoid reversing valve 610 is energized. At this time, the back pressure port of the pressure reducing valve 411 flows back to the oil tank 10 through the right cavity of the second solenoid reversing valve 711 and through the pressure reducing branch pipe 730 and the pressure reducing oil pipe 700. The maximum pressure at the outlet of the pressure reducing valve 411 is the set pressure P3 of the pressure reducing valve 411.

[0086] When both a and b of the second electromagnetic reversing valve 711 are de-energized, the hydraulic cylinder 100 remains stationary.

[0087] In an embodiment of the present invention, the reeling car hydraulic system further includes a fourth pressure measuring joint 430 disposed on the oil supply pipe 400, the fourth pressure measuring joint 430 is located between the second electromagnetic reversing valve 711 and the pressure reducing valve 411, and the fourth pressure measuring joint 430 is used to connect a fourth hydraulic sensor.

[0088] The fourth pressure measuring joint 430 and the fourth hydraulic sensor can cooperate to monitor the pressure changes in the pressure reducing oil pipe 700 in real time. Once the pressure exceeds the set threshold, the hydraulic system can quickly take measures, such as activating a protection mechanism or sounding an alarm, thereby effectively preventing potential risks caused by excessive pressure.

[0089] In an embodiment of the present invention, Figure 1 In the illustrated embodiment, the fourth control valve group includes an oil return check valve 511 disposed on the oil return pipe 500. The oil return check valve 511 ensures that the oil can only flow in one direction, thereby preventing the oil from flowing back in the event of system pressure fluctuations or abnormal conditions.

[0090] In another possible embodiment of the present invention, Figure 2 In the illustrated embodiment, the third control valve group includes a first proportional pressure reducing valve 412 disposed on the oil supply pipe 400 , the oil outlet of the first proportional pressure reducing valve 412 is connected to the oil return pipe 500 and is disposed upstream of the fourth control valve group.

[0091] By arranging the first proportional pressure reducing valve 412 on the oil supply pipe 400, the first proportional pressure reducing valve 412 can adjust the output pressure according to the requirements of the hydraulic system. Compared with the traditional fixed pressure reducing valve, the proportional pressure reducing valve 411 can be adjusted in real time according to the actual working conditions, playing a stepless adjustment role, ensuring that the hydraulic system always works within the optimal pressure range, and improving the response speed and control accuracy of the system.

[0092] Furthermore, the first proportional pressure reducing valve 412 can effectively suppress pressure fluctuations in the oil supply pipe 400, ensure the pressure stability of each part of the hydraulic system, help reduce operational errors caused by unstable pressure, and improve the overall stability of the system.

[0093] Specifically, the weight G2 of the steel coil is measured in the upstream process, and G2 can be zero (when unloading the coil) or the maximum weight (for example, 28 tons). The resultant force F of the hydraulic cylinder 100 when winding is calculated from G2, and the maximum pressure required at the outlet of the first proportional pressure reducing valve 412 is calculated, and the command current signal of the first proportional pressure reducing valve 412 is adjusted to achieve stepless adjustment of the maximum pressure at the outlet of the first proportional pressure reducing valve 412.

[0094] In another possible embodiment of the present invention, Figure 3 In the embodiment shown, the hydraulic control mechanism includes a second proportional pressure reducing valve 620; the first control valve group includes a first hydraulically controlled one-way valve 211, a first overflow valve 213, and a first manual valve 214, which are sequentially arranged on the first oil pipe 200, and the overflow port of the first overflow valve 213 is connected to the return oil pipe 500 and is placed upstream of the fourth control valve group; the second control valve group includes a second hydraulically controlled one-way valve 311 and a first manual valve 214, which are sequentially arranged on the second oil pipe 300.

[0095] The output pressure can be adjusted according to the requirements of the hydraulic system through the second proportional pressure reducing valve 620. The second proportional pressure reducing valve 620 can be adjusted in real time according to the actual working conditions to ensure that the hydraulic system always works within the optimal pressure range, and can realize the stepless adjustment of the extension and retraction speed of the hydraulic cylinder 100, thereby improving the response speed and control accuracy of the system. Through precise pressure and flow control, the hydraulic system of the winding car can reduce unnecessary energy consumption and achieve energy saving and environmental protection.

[0096] In other possible embodiments of the present invention, Figure 4 In the embodiment shown, the third control valve group includes a first proportional pressure reducing valve 412 disposed on the oil supply pipe 400, and the hydraulic control mechanism includes a second proportional pressure reducing valve 620, which is not specifically limited here. By cooperating with the first proportional pressure reducing valve 412 and the second proportional pressure reducing valve 620, the stepless regulation of the pressure and speed of the hydraulic cylinder 100 can be achieved.

[0097] In the embodiment of the present invention, the hydraulic system of the winding car further includes a displacement sensor 800 disposed on the hydraulic cylinder 100, and the displacement sensor 800 is used to detect the driving stroke of the hydraulic cylinder 100. The displacement sensor 800 can monitor the piston rod position of the hydraulic cylinder 100 in real time and provide high-precision position feedback, so that the actual working state of the hydraulic cylinder 100 can be accurately grasped to ensure that it moves accurately according to the preset stroke.

[0098] In an embodiment of the present invention, a control module is further included, and the control module is electrically connected to the hydraulic system of the winding car. The hydraulic system of the winding car is controlled by the control module to perform actions, thereby helping to improve the degree of automatic control of the hydraulic system of the winding car, and facilitating operators to better control the hydraulic system of the winding car.

[0099] Implementation Method 2

[0100] In an embodiment of the present invention, a leveling machine coiler is provided, and the leveling machine coiler includes the above-mentioned coiler hydraulic system. The specific structure, working principle and beneficial effects of the coiler hydraulic system are the same as those in the first embodiment, and will not be repeated here.

[0101] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

[0102] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hydraulic system for a wind-up car, characterized in that: include: A hydraulic cylinder, the hydraulic cylinder comprising a rodless chamber and a rod chamber; a first oil pipe, the first oil pipe being connected to the rodless chamber and having a first control valve group disposed on the first oil pipe; a second oil pipe, the second oil pipe being connected to the rod chamber and provided with a second control valve group; An oil supply pipe, the oil supply pipe is used to communicate with the oil tank, and a hydraulic pump group and a third control valve group are arranged on the oil supply pipe; An oil return pipe, the oil return pipe is used to communicate with the oil tank, and a fourth control valve group is provided on the oil return pipe; A hydraulic control mechanism, wherein the hydraulic control mechanism controllably connects the first oil pipe, the second oil pipe, the oil supply pipe and the oil return pipe, and the hydraulic control mechanism is used to adjust the pressure of the rodless chamber and / or the rod chamber.

2. The hydraulic system for the wind-up vehicle according to claim 1, characterized in that: The hydraulic control mechanism includes a first electromagnetic reversing valve, the oil inlet of the first electromagnetic reversing valve is connected to the oil supply pipe, the oil return port of the first electromagnetic reversing valve is connected to the oil return pipe, and the two working oil ports of the first electromagnetic reversing valve are respectively connected to the first oil pipe and the second oil pipe.

3. The hydraulic system for the wind-up vehicle according to claim 1, characterized in that: Along the direction from the hydraulic regulating mechanism to the hydraulic cylinder, the first control valve group includes a first hydraulically controlled one-way valve, a first throttle valve, a first overflow valve, and a first manual valve which are sequentially arranged on the first oil pipe.

4. The hydraulic system for the wind-up vehicle according to claim 3, characterized in that: The overflow port of the first overflow valve is connected to the oil return pipe and is placed upstream of the fourth control valve group.

5. The hydraulic system for the wind-up vehicle according to claim 3, characterized in that: The first oil pipe is provided with a first rubber hose section, and the first rubber hose section is arranged between the first manual valve and the hydraulic cylinder.

6. The hydraulic system for the wind-up vehicle according to claim 3, characterized in that: The hydraulic system of the winding car further includes a first pressure measuring joint arranged on the first oil pipe, the first pressure measuring joint is located between the first overflow valve and the first manual valve, and the first pressure measuring joint is used to connect to a first hydraulic sensor.

7. The hydraulic system for a wind-up vehicle according to claim 1, characterized in that: Along the direction from the hydraulic regulating mechanism to the hydraulic cylinder, the second control valve group includes a second hydraulically controlled one-way valve, a second throttle valve, and a second manual valve which are sequentially arranged on the second oil pipe.

8. The hydraulic system for a wind-up vehicle according to claim 7, characterized in that: The second oil pipe is provided with a second rubber hose section, and the second rubber hose section is arranged between the second manual valve and the hydraulic cylinder.

9. The hydraulic system for a wind-up vehicle according to claim 7, characterized in that: The reeling car hydraulic system further comprises a second pressure measuring joint provided on the second oil pipe, the second pressure measuring joint being located between the second throttle valve and the second manual valve, and the second pressure measuring joint being used for connecting a second hydraulic sensor.

10. The hydraulic system for a wind-up vehicle according to claim 1, characterized in that: The third control valve group includes a pressure reducing valve arranged on the oil supply pipe, and the pressure reducing valve is located between the hydraulic control mechanism and the hydraulic pump group; The hydraulic system of the winding car further comprises a pressure reducing oil pipe, which is used to connect the back pressure port of the pressure reducing valve and the oil tank, and a fifth control valve group is arranged on the pressure reducing oil pipe.

11. The hydraulic system for a wind-up vehicle according to claim 10, characterized in that: The reeling car hydraulic system further comprises a third pressure measuring joint provided on the pressure reducing oil pipe, the third pressure measuring joint being located between the pressure reducing valve and the fifth control valve group, and the third pressure measuring joint being used for connecting a third hydraulic sensor.

12. The hydraulic system for a wind-up vehicle according to claim 10, characterized in that: Along the direction from the pressure reducing valve to the oil tank, the fifth control valve group includes a second electromagnetic reversing valve and a pressure regulating valve sequentially arranged on the pressure reducing oil pipe, the oil inlet of the second electromagnetic reversing valve is connected to the oil tank through the pressure regulating valve, and the two working oil ports of the second electromagnetic reversing valve are controllably connected to the back pressure port of the pressure reducing valve; The hydraulic system of the winding car further includes a pressure reducing branch pipe arranged in parallel with the pressure regulating valve, and the pressure reducing branch pipe is connected with the oil return port of the second electromagnetic reversing valve and the pressure reducing oil pipe.

13. The hydraulic system for a wind-up vehicle according to claim 12, characterized in that: The hydraulic system of the winding car further includes a fourth pressure measuring joint arranged on the oil supply pipe, the fourth pressure measuring joint is located between the second electromagnetic reversing valve and the pressure reducing valve, and the fourth pressure measuring joint is used to connect a fourth hydraulic sensor.

14. The hydraulic system for a wind-up vehicle according to claim 1, characterized in that: The fourth control valve group includes an oil return one-way valve arranged on the oil return pipe.

15. The hydraulic system for a wind-up vehicle according to claim 1, characterized in that: The third control valve group includes a first proportional pressure reducing valve arranged on the oil supply pipe, wherein the oil outlet of the first proportional pressure reducing valve is connected to the oil return pipe and is arranged upstream of the fourth control valve group.

16. The hydraulic system for a wind-up vehicle according to claim 1 or 15, characterized in that: The hydraulic control mechanism includes a second proportional pressure reducing valve; the first control valve group includes a first hydraulically controlled one-way valve, a first overflow valve, and a first manual valve which are sequentially arranged on the first oil pipe, and the overflow port of the first overflow valve is connected to the return oil pipe and is placed upstream of the fourth control valve group; the second control valve group includes a second hydraulically controlled one-way valve and a first manual valve which are sequentially arranged on the second oil pipe.

17. The hydraulic system for a wind-up vehicle according to claim 1, characterized in that: The hydraulic system of the winding car further includes a displacement sensor arranged on the hydraulic cylinder, and the displacement sensor is used to detect the driving stroke of the hydraulic cylinder.

18. A coiling machine for a leveling machine, characterized in that: The invention comprises a reeling car hydraulic system as claimed in any one of claims 1 to 17.

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