Hydraulic control loop for wrapper roller

Abstract

The invention provides a wrapper roller hydraulic control loop which comprises a main control loop unit, the main control loop unit is provided with an oil inlet, an oil return opening, a first oil opening and a second oil opening, the oil inlet is used for being communicated with the oil supply end of a hydraulic source, and the oil return opening is used for being communicated with the oil return end of the hydraulic source; the main control loop unit is used for controlling the oil outlet conditions of the first oil port and the second oil port according to the electric signals; the bypass loop unit is used for being communicated with a hydraulic source, the bypass loop unit comprises a first bypass pipeline and a second bypass pipeline, the first bypass pipeline is communicated with the rod cavity, the second bypass pipeline is communicated with the rodless cavity, and the bypass loop unit is used for manually controlling the oil flow direction of the first bypass pipeline and the oil flow direction of the second bypass pipeline; the protection loop unit is used for controlling the oil pressure of the rod cavity and the rodless cavity, so that the oil pressure of the rod cavity and the rodless cavity is smaller than an oil pressure threshold value; the first bypass pipeline and the second bypass pipeline are connected to the hydraulic cylinder through the protection loop unit.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coilers, and in particular to a hydraulic control circuit for an auxiliary coiling roller. Background Art

[0002] The winding roller of the coiler is an important equipment in the winding area, responsible for introducing the head of the strip into the core shaft. The existing winding roller of the coiler can often only be controlled by electrical signals. In the absence of electrical signals, the control ability of the hydraulic cylinder of the winding roller is lost, which makes it inconvenient to inspect or maintain the winding roller. At the same time, if the electrical signal fails during the production process, the winding roller will be out of control, which can easily cause damage to large batches of products. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, the present disclosure provides a hydraulic control circuit for a winding roller.

[0005] In view of this, according to an embodiment of the present disclosure, a hydraulic control circuit for a winding roller is proposed, comprising:

[0006] A main control circuit unit, the main control circuit unit has an oil inlet, an oil return port, a first oil port and a second oil port, the oil inlet is used to be connected to the oil supply end of the hydraulic source, the oil return port is used to be connected to the oil return end of the hydraulic source, and the main control circuit unit is used to control the oil output of the first oil port and the second oil port according to the electrical signal;

[0007] A first oil circuit, one end of which is connected to the first oil port, and the other end of which is used to be connected to the rod chamber of the hydraulic cylinder;

[0008] a second oil circuit, one end of which is connected to the second oil port, and the other end of which is used to be connected to the rodless chamber of the hydraulic cylinder;

[0009] A bypass circuit unit, used to be connected to a hydraulic source, the bypass circuit unit includes a first bypass pipeline and a second bypass pipeline, the first bypass pipeline is connected to the first oil circuit, the second bypass pipeline is connected to the second oil circuit, and the bypass circuit unit is used to manually control the oil flow direction of the first bypass pipeline and the second bypass pipeline;

[0010] A protection circuit unit is used to control the oil pressure of the rod chamber and the rodless chamber so that the oil pressure of the rod chamber and the rodless chamber is less than an oil pressure threshold;

[0011] Wherein, the first bypass pipeline and the second bypass pipeline are both connected to the hydraulic cylinder through the protection circuit unit.

[0012] In a feasible implementation manner, the protection circuit unit includes:

[0013] A pressure regulating module, used for regulating the oil pressure of the first bypass pipeline and the second bypass pipeline;

[0014] The pressure relief module is arranged in the first oil circuit and the second oil circuit, and is used to control the oil pressure of the first oil circuit and the second oil circuit to be less than an oil pressure threshold.

[0015] In a feasible implementation, the voltage regulating module includes:

[0016] A speed regulating valve, wherein the first bypass pipeline and the second bypass pipeline are both provided with a speed regulating valve;

[0017] The balancing valve is arranged between the first bypass pipeline and the second bypass pipeline, and is used for balancing the pressure between the first bypass pipeline and the second bypass pipeline.

[0018] In a feasible implementation manner, the voltage regulating module further includes:

[0019] The hydraulic lock is arranged in the first bypass pipeline and the second bypass pipeline.

[0020] In a feasible implementation manner, the pressure relief module further includes:

[0021] a first relief valve, wherein a liquid inlet end of the first relief valve is connected to a first oil circuit, and an oil outlet end of the first relief valve is connected to an oil return end of a hydraulic source;

[0022] The second overflow valve, the liquid inlet end of the first overflow valve is connected to the second oil circuit, and the oil outlet end of the first overflow valve is connected to the oil return end of the hydraulic source.

[0023] In a feasible implementation manner, the first relief valve is a cartridge-type relief valve.

[0024] In a feasible implementation manner, the bypass circuit unit further includes:

[0025] The manual reversing valve is used to be connected to the hydraulic source. The first bypass pipeline and the second bypass pipeline are connected to the manual reversing valve. The manual reversing valve is used to switch the flow direction of the first bypass pipeline and the second bypass pipeline.

[0026] In a feasible implementation manner, the main control loop unit includes:

[0027] A servo valve, wherein the oil inlet, the oil return port, the first oil port and the second oil port are all formed on the servo valve;

[0028] Solenoid reversing valve, the electrical signal is connected to the servo valve, and the solenoid reversing valve is used to control the oil circuit direction of the servo valve;

[0029] Stop valve: the oil inlet, the first oil port and the second oil port are all provided with a stop valve, and the stop valve is used to control the cut-off or conduction of the pipeline;

[0030] Among them, the electromagnetic reversing valve and the stop valve are connected by signal.

[0031] In a feasible implementation manner, the stop valve is a cartridge valve.

[0032] In a feasible implementation, it also includes:

[0033] A pressure sensor, the first oil circuit and the second oil circuit are both provided with a pressure sensor, the pressure sensor is used to detect the pressure information of the first oil circuit and the second oil circuit;

[0034] The accumulator is used to be arranged between the hydraulic source and the main control circuit unit.

[0035] Compared with the prior art, the present disclosure has at least the following beneficial effects: the hydraulic control circuit of the auxiliary winding roller provided in the embodiment of the present disclosure includes a main control circuit unit, a first oil circuit, a second oil circuit, a bypass circuit unit and a protection circuit unit. Both the main control circuit unit and the bypass circuit unit can be used to control the hydraulic cylinder of the auxiliary winding roller. The main control circuit unit controls the hydraulic cylinder through an electrical signal. The bypass circuit unit can control the hydraulic cylinder of the auxiliary winding roller by manually controlling the oil flow direction of the first bypass pipeline and the second bypass pipeline. The bypass circuit unit includes a first bypass circuit and a second bypass circuit. Bypass circuit, and the first bypass circuit and the second bypass circuit are connected to the hydraulic cylinder through the protection control circuit, the protection circuit unit can control the oil pressure of the rod chamber and the rodless chamber, and can make the oil pressure of the rod chamber and the rodless chamber less than the oil pressure threshold, which is beneficial to ensure the stable operation of the auxiliary winding roller and the safety of the oil circuit; in daily production, the hydraulic cylinder of the auxiliary winding roller can be controlled by the main control circuit unit for rapid response of the hydraulic cylinder; in the absence of electrical signals, the hydraulic cylinder of the auxiliary winding roller can be controlled by the bypass circuit unit, which is convenient for inspection and maintenance of the auxiliary winding roller.

[0036] The hydraulic control circuit for the auxiliary winding roller disclosed in the present invention, and other advantages, objectives and features of the present invention will be embodied in part through the following description, and will also be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic structural diagram of a hydraulic control circuit for a winder roller according to an embodiment of the present disclosure.

[0039] in, Figure 1The corresponding relationship between the reference numerals and the component names is as follows:

[0040] 900 hydraulic cylinder, 9001 has a rod chamber, 9002 has no rod chamber;

[0041] 100 main control circuit unit, 210 first oil circuit, 310 second oil circuit;

[0042] 400 bypass circuit units, 500 protection circuit units;

[0043] 410 a first bypass pipeline, 420 a second bypass pipeline;

[0044] 510 pressure regulating module, 520 pressure relief module;

[0045] 511 speed regulating valve, 512 balancing valve, 513 hydraulic lock;

[0046] 521 a first relief valve, 522 a second relief valve;

[0047] 430 manual reversing valve;

[0048] 110 servo valve, 120 solenoid reversing valve, 130 stop valve;

[0049] 610 pressure sensor, 710 accumulator. DETAILED DESCRIPTION

[0050] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0051] like Figure 1As shown, according to an embodiment of the present disclosure, a hydraulic control circuit for a winding roller is proposed, including: a main control circuit unit 100, the main control circuit unit 100 has an oil inlet, an oil return port, a first oil port, and a second oil port, the oil inlet is used to connect to the oil supply end of the hydraulic source, the oil return port is used to connect to the oil return end of the hydraulic source, and the main control circuit unit 100 is used to control the oil output of the first oil port and the second oil port according to an electrical signal; a first oil circuit 210, one end of the first oil circuit 210 is connected to the first oil port, and the other end of the first oil circuit 210 is used to connect to the rod chamber 9001 of the hydraulic cylinder 900; a second oil circuit 310, one end of the second oil circuit 310 is connected to the second oil port, and the other end of the second oil circuit 310 is used to connect to the rod chamber 9001 of the hydraulic cylinder 900; The rodless chamber 9002; a bypass circuit unit 400, which is used to be connected to a hydraulic source, and the bypass circuit unit 400 includes a first bypass line 410 and a second bypass line 420, wherein the first bypass line 410 is connected to the first oil circuit 210, and the second bypass line 420 is connected to the second oil circuit 310, and the bypass circuit unit 400 is used to manually control the oil flow direction of the first bypass line 410 and the second bypass line 420; a protection circuit unit 500, which is used to control the oil pressure of the rod chamber 9001 and the rodless chamber 9002, so that the oil pressure of the rod chamber 9001 and the rodless chamber 9002 is less than the oil pressure threshold; wherein the first bypass line 410 and the second bypass line 420 are both connected to the hydraulic cylinder 900 through the protection circuit unit 500.

[0052] The hydraulic control circuit of the auxiliary winding roller proposed in the embodiment of the present disclosure includes a main control circuit unit 100, a first oil circuit 210, a second oil circuit 310, a bypass circuit unit 400 and a protection circuit unit 500. Both the main control circuit unit 100 and the bypass circuit unit 400 can be used to control the hydraulic cylinder 900 of the auxiliary winding roller. The main control circuit unit 100 controls the hydraulic cylinder 900 through an electrical signal. The bypass circuit unit 400 can control the hydraulic cylinder 900 of the auxiliary winding roller by manually controlling the oil flow direction of the first bypass pipeline 410 and the second bypass pipeline 420. The bypass circuit unit 400 includes a first bypass circuit and a second bypass circuit. In addition, the first bypass loop and the second bypass loop are both connected to the hydraulic cylinder 900 through the protection control loop. The protection loop unit 500 can control the oil pressure of the rod chamber 9001 and the rodless chamber 9002, so that the oil pressure of the rod chamber 9001 and the rodless chamber 9002 are both less than the oil pressure threshold, which is beneficial to ensure the stable operation of the auxiliary winding roller and the safety of the oil circuit; in daily production, the hydraulic cylinder 900 of the auxiliary winding roller can be controlled by the main control loop unit 100 for the rapid response of the hydraulic cylinder 900; in the absence of an electrical signal, the hydraulic cylinder 900 of the auxiliary winding roller can be controlled by the bypass loop unit 400, which is convenient for the inspection and maintenance of the auxiliary winding roller.

[0053] It can be understood that the oil pressure threshold is a specified pressure value specified according to the condition of the oil circuit. When the oil pressure in the rod chamber 9001 or the rodless chamber 9002 is below the oil pressure threshold, the safe operation of the hydraulic cylinder 900 can be guaranteed.

[0054] It can be understood that when the oil circuit pressure of the rod chamber 9001 or the rodless chamber 9002 is greater than the oil pressure threshold, the protection circuit unit 500 can relieve the pressure on the corresponding oil circuit of the rod chamber 9001 or the rodless chamber 9002 so that the oil circuit pressure of the rod chamber 9001 and the rodless chamber 9002 is lower than the oil pressure threshold.

[0055] It can be understood that in daily production, when the auxiliary winding roller needs to be opened, the oil supply end of the hydraulic source supplies oil to the oil inlet of the main control circuit unit 100, and the hydraulic oil enters the rod chamber 9001 through the first oil circuit 210. At the same time, the hydraulic oil in the rodless chamber 9002 returns to the main control circuit unit 100 from the second oil circuit 310, and then flows back to the oil return end of the hydraulic source from the oil outlet, thereby realizing the opening of the auxiliary winding roller; when the auxiliary winding roller needs to be closed, the oil supply end of the hydraulic source supplies oil to the oil inlet of the main control circuit unit 100, and the hydraulic oil enters the rodless chamber 9002 through the second oil circuit 310. At the same time, the hydraulic oil in the rod chamber 9001 returns to the main control circuit unit 100 from the first oil circuit 210, and then flows back to the oil return end of the hydraulic source from the oil outlet, thereby realizing the closing of the auxiliary winding roller; in the case where there is no electrical signal and the auxiliary winding roller needs to be inspected and maintained. When the auxiliary winding roller needs to be opened, the oil supply end of the hydraulic source supplies oil to the bypass circuit unit 400, and the first bypass line 410 of the bypass circuit unit 400 supplies oil to the rod chamber 9001 of the hydraulic cylinder 900 through the first oil circuit 210. At the same time, the hydraulic oil inside the rodless chamber 9002 of the hydraulic cylinder 900 enters the second bypass line 420 through the second oil circuit 310 and then flows back to the hydraulic source, thereby realizing the opening of the auxiliary winding roller; when the auxiliary winding roller needs to be closed, the oil supply end of the hydraulic source supplies oil to the bypass circuit unit 400, and the second bypass line 420 of the bypass circuit unit 400 supplies oil to the rodless chamber 9002 of the hydraulic cylinder 900 through the second oil circuit 310. At the same time, the hydraulic oil inside the rod chamber 9001 of the hydraulic cylinder 900 enters the first bypass line 410 through the first oil circuit 210 and then flows back to the hydraulic source, thereby realizing the closing of the auxiliary winding roller.

[0056] It should be noted that the winding roller of the coiler is an important equipment in the winding area, which is responsible for introducing the head of the strip into the core shaft. If the winding roller fails, it is easy to squeeze the strip and cause indentations on the surface of the strip, seriously affecting the product quality. In traditional technology, the winding roller of the coiler can often only be controlled by electrical signals. In the absence of electrical signals, the control ability of the hydraulic cylinder 900 of the winding roller is lost, which makes it inconvenient to inspect or maintain the winding roller. At the same time, if the electrical signal fails during the production process, the winding roller will be out of control, which can easily cause damage to large batches of products. The auxiliary winding roller hydraulic control circuit proposed in the embodiment of the present invention, based on the above-mentioned setting, can also manually control the oil flow direction of the first bypass line 410 and the second bypass line 420 through the bypass circuit unit 400 in the absence of an electrical signal, thereby realizing the control of the auxiliary winding roller hydraulic cylinder 900, and then realizing the opening or closing of the auxiliary winding roller, and increasing the control method of the auxiliary winding roller. On the one hand, it can make it easier to inspect and maintain the auxiliary winding roller. On the other hand, in the event of an electrical signal failure, the auxiliary winding roller can still be controlled through the bypass circuit unit 400, thereby reducing the damage to the product caused by the failure of the auxiliary winding roller.

[0057] In some examples, such as Figure 1 As shown, the protection circuit unit 500 includes: a pressure regulating module 510, used to adjust the oil pressure of the first bypass line 410 and the second bypass line 420; a pressure relief module 520, arranged in the first oil circuit 210 and the second oil circuit 310, used to control the oil pressure of the first oil circuit 210 and the second oil circuit 310 to be less than the oil pressure threshold.

[0058] In the above technical solution, the protection circuit unit 500 includes a pressure regulating module 510 and a pressure relief module 520. The pressure regulating module 510 is used to control the stability of the oil circuit. The pressure regulating module 510 can control the oil pressure delivered by the first bypass line 410 and the second bypass line 420 to the first oil circuit 210 and the second oil circuit 310 by adjusting the oil pressure of the first bypass line 410 and the second bypass line 420, thereby controlling the oil pressure of the rod chamber 9001 and the rodless chamber 9002 of the hydraulic cylinder 900; the pressure relief module 520 is used to ensure the safety of the oil circuit. The pressure relief module 520 is arranged on the first oil circuit 210 and the second oil circuit 310. The pressure relief module 520 can make the oil pressure of the first oil circuit 210 and the second oil circuit 310 less than the oil pressure threshold, so that the oil pressure of the rod chamber 9001 and the rodless chamber 9002 of the hydraulic cylinder 900 is less than the oil pressure threshold, thereby ensuring the safety of the oil circuit. The pressure regulating module 510 and the pressure relief module 520 jointly assist the bypass circuit unit 400 to achieve safe and stable control of the hydraulic cylinder 900.

[0059] In some examples, such as Figure 1As shown, the pressure regulating module 510 includes: a speed regulating valve 511, both the first bypass line 410 and the second bypass line 420 are provided with a speed regulating valve 511; a balancing valve 512, which is arranged between the first bypass line 410 and the second bypass line 420 and is used to balance the pressure between the first bypass line 410 and the second bypass line 420.

[0060] In the above technical scheme, the pressure regulating module 510 includes a speed regulating valve 511 and a balancing valve 512, wherein the speed regulating valve 511 can adjust the hydraulic flow rate of the first bypass line 410 and the second bypass line 420, and realizes the hydraulic control of the rod chamber 9001 and the rodless chamber 9002 of the hydraulic cylinder 900, and the balancing valve 512 is arranged between the first bypass line 410 and the second bypass line 420. The balancing valve 512 can balance the pressure difference between the first bypass line 410 and the second bypass line 420, thereby reducing the pressure difference between the rod chamber 9001 of the hydraulic cylinder 900 and the rodless chamber 9002 of the hydraulic cylinder 900, and improving the stability of the oil circuit. At the same time, the setting of the balancing valve 512 can also limit the flow and pressure of the first bypass line 410 and the second bypass line 420, which can further improve the stability of the oil circuit.

[0061] In some examples, such as Figure 1 As shown, the pressure regulating module 510 further includes: a hydraulic lock 513 , which is arranged in the first bypass line 410 and the second bypass line 420 .

[0062] In the above technical solution, the pressure regulating module 510 also includes a hydraulic lock 513, which is arranged in the first bypass line 410 and the second bypass line 420. The hydraulic lock 513 can play a role in maintaining pressure. When the auxiliary winding roller is paused, it can ensure the stability of the auxiliary winding roller and reduce the risk of oil circuit reversal under the action of gravity, thereby further improving the safety and stability of the auxiliary winding roller oil circuit.

[0063] In some examples, such as Figure 1 As shown, the pressure relief module 520 also includes: a first overflow valve 521, the liquid inlet end of the first overflow valve 521 is connected to the first oil circuit 210, and the oil outlet end of the first overflow valve 521 is connected to the return oil end of the hydraulic source; a second overflow valve 522, the liquid inlet end of the first overflow valve 521 is connected to the second oil circuit 310, and the oil outlet end of the first overflow valve 521 is connected to the return oil end of the hydraulic source.

[0064] In the above technical scheme, the pressure relief module 520 includes a first overflow valve 521 and a second overflow valve 522. The first overflow valve 521 is arranged between the first oil circuit 210 and the return oil end of the hydraulic source. Therefore, when the pressure of the first oil circuit 210 is greater than or equal to the oil pressure threshold, the first oil circuit 210 can directly relieve the pressure of the hydraulic oil and discharge it back to the return oil end of the hydraulic source through the first overflow valve 521, so that the pressure of the rod chamber 9001 can be stabilized, which is beneficial to the stable operation of the auxiliary winding roller; the second overflow valve 522 is arranged between the second oil circuit 310 and the return oil end of the hydraulic source. Therefore, when the pressure of the second oil circuit 310 is greater than or equal to the oil pressure threshold, the second oil circuit 310 can directly relieve the pressure of the hydraulic oil and discharge it back to the return oil end of the hydraulic source through the second overflow valve 522, so that the pressure of the rodless chamber 9002 can be stabilized, which is beneficial to the stable operation of the auxiliary winding roller.

[0065] In some examples, the first relief valve 521 is a cartridge relief valve.

[0066] In the above technical solution, the first overflow valve 521 adopts a plug-in overflow valve, which can improve the response speed of the first overflow valve 521.

[0067] In some examples, such as Figure 1 As shown, the bypass circuit unit 400 further includes:

[0068] The manual reversing valve 430 is used to be connected to the hydraulic source. The first bypass line 410 and the second bypass line 420 are connected to the manual reversing valve 430 . The manual reversing valve 430 is used to switch the flow direction of the first bypass line 410 and the second bypass line 420 .

[0069] In the above technical solution, the bypass circuit unit 400 also includes a manual reversing valve 430, which is directly connected to the hydraulic source, so that the oil supply end of the hydraulic source can be controlled to be connected to one of the first bypass line 410 and the second bypass line, and the oil return end of the hydraulic source can be controlled to be connected to the other of the first bypass line 410 and the second bypass line. The manual reversing valve 430 can switch the above control, so that the manual reversing valve 430 can switch the flow direction of the hydraulic oil in the first bypass line 410 and the second bypass line 420 to achieve control of the hydraulic conditions of the rod chamber 9001 and the rodless chamber 9002 of the hydraulic cylinder 900. The manual reversing valve 430 is simple and convenient to operate, and can be manually operated in the absence of an electrical signal, which is convenient for staff to use when inspecting and maintaining the auxiliary winding roller.

[0070] In some examples, such as Figure 1As shown, the main control circuit unit 100 includes: a servo valve 110, wherein an oil inlet, an oil return port, a first oil port and a second oil port are all formed on the servo valve 110; an electromagnetic reversing valve 120, wherein an electrical signal is connected to the servo valve 110, and the electromagnetic reversing valve 120 is used to control the oil circuit direction of the servo valve 110; a stop valve 130, wherein the oil inlet, the first oil port and the second oil port are all provided with a stop valve 130, and the stop valve 130 is used to control the cut-off or conduction of the pipeline; wherein a signal connection is provided between the electromagnetic reversing valve 120 and the stop valve 130.

[0071] In the above technical solution, the main control circuit unit 100 includes a servo valve 110, an electromagnetic reversing valve 120 and a stop valve 130, wherein the electromagnetic reversing valve 120 can control the oil supply method of the servo valve 110 through an electrical signal, and the electromagnetic reversing valve 120 and the stop valve 130 are signal-connected, and the electromagnetic reversing valve 120 can control the conduction or cut-off of the stop valve 130 through an electrical signal, so that the stop valve 130 cooperates with the servo valve 110 to realize the control of the hydraulic cylinder 900.

[0072] In some examples, shutoff valve 130 is a cartridge valve.

[0073] In the above technical solution, the stop valve 130 uses a cartridge valve, which can improve the response speed of the oil circuit, which is beneficial for the stop valve 130 to respond quickly when the auxiliary winding roller is controlled by an electrical signal, thereby improving the reaction speed of the auxiliary winding roller.

[0074] It should be noted that, in the prior art, the hydraulic control circuit of the winding roller adopts a conventional hydraulic valve for controlling on and off in combination with a one-way valve to realize the control of the winding roller. However, the control method in the prior art has a slow response speed of the winding roller, so that there is a long delay from the electrical signal for opening the winding roller to the opening of the winding roller, which can easily cause the winding roller to squeeze the strip for a long time, easily causing indentations on the strip, and affecting the quality of the strip. The cartridge valve used in the embodiment of the present disclosure as the stop valve 130 can increase the response speed of the winding roller through a larger hydraulic flow, thereby reducing the influence of the winding roller on the quality of the strip.

[0075] In some examples, such as Figure 1 As shown, it also includes: a pressure sensor 610, both the first oil circuit 210 and the second oil circuit 310 are provided with a pressure sensor 610, and the pressure sensor 610 is used to detect the pressure information of the first oil circuit 210 and the second oil circuit 310; an accumulator 710, and the accumulator 710 is used to be arranged between the hydraulic source and the main control circuit unit 100.

[0076] The above technical solution also includes a pressure sensor 610 and an accumulator 710. By detecting the pressure information of the first oil circuit 210 and the second oil circuit 310 through the pressure sensor 610, the pressure information of the rod chamber 9001 and the rodless chamber 9002 of the hydraulic cylinder 900 can be detected; the accumulator 710 can store the hydraulic oil released by the hydraulic source, and release it when the pressure inside the circuit is lower than the pressure of the accumulator 710, so as to supplement the pressure of the circuit, which is beneficial to the stable operation of the hydraulic circuit.

[0077] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0078] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0079] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A hydraulic control circuit for a winding roller, characterized in that: include: A main control circuit unit, the main control circuit unit having an oil inlet, an oil return port, a first oil port and a second oil port, the oil inlet being used to be connected to an oil supply end of a hydraulic source, the oil return port being used to be connected to an oil return end of the hydraulic source, the main control circuit unit being used to control the oil discharge of the first oil port and the second oil port according to an electrical signal; a first oil circuit, one end of which is connected to the first oil port, and the other end of which is connected to the rod chamber of the hydraulic cylinder; a second oil circuit, one end of the second oil circuit being connected to the second oil port, and the other end of the second oil circuit being connected to the rodless chamber of the hydraulic cylinder; A bypass circuit unit, used to be connected to the hydraulic source, the bypass circuit unit includes a first bypass pipeline and a second bypass pipeline, the first bypass pipeline is connected to the first oil circuit, the second bypass pipeline is connected to the second oil circuit, and the bypass circuit unit is used to manually control the oil flow direction of the first bypass pipeline and the second bypass pipeline; A protection circuit unit, used for controlling the oil pressure of the rod chamber and the rodless chamber so that the oil pressure of the rod chamber and the rodless chamber is less than an oil pressure threshold; Wherein, the first bypass pipeline and the second bypass pipeline are both connected to the hydraulic cylinder through the protection circuit unit.

2. The hydraulic control circuit of the winding roller according to claim 1, characterized in that: The protection circuit unit comprises: A pressure regulating module, used for regulating the oil pressure of the first bypass pipeline and the second bypass pipeline; The pressure relief module is arranged in the first oil circuit and the second oil circuit, and is used to control the oil pressure of the first oil circuit and the second oil circuit to be less than an oil pressure threshold.

3. The hydraulic control circuit of the winding roller according to claim 2, characterized in that: The voltage regulating module comprises: A speed regulating valve, wherein the first bypass pipeline and the second bypass pipeline are both provided with a speed regulating valve; The balancing valve is disposed between the first bypass pipeline and the second bypass pipeline, and is used for balancing the pressure between the first bypass pipeline and the second bypass pipeline.

4. The hydraulic control circuit of the winding roller according to claim 3, characterized in that: The voltage regulating module also includes: A hydraulic lock is arranged on the first bypass pipeline and the second bypass pipeline.

5. The hydraulic control circuit of the winding roller according to claim 2, characterized in that: The pressure relief module comprises: a first relief valve, wherein a liquid inlet end of the first relief valve is connected to the first oil circuit, and an oil outlet end of the first relief valve is connected to an oil return end of a hydraulic source; The second overflow valve, the liquid inlet end of the first overflow valve is connected to the second oil circuit, and the oil outlet end of the first overflow valve is connected to the oil return end of the hydraulic source.

6. The hydraulic control circuit of the winding roller according to claim 5, characterized in that: The first relief valve is a cartridge relief valve.

7. The hydraulic control circuit of the winding roller according to claim 1, characterized in that: The bypass circuit unit also includes: A manual reversing valve is used to be connected to the hydraulic source, the first bypass line and the second bypass line are connected to the manual reversing valve, and the manual reversing valve is used to switch the flow direction of the first bypass line and the second bypass line.

8. The hydraulic control circuit of the winding roller according to claim 1, characterized in that: The main control loop unit comprises: A servo valve, wherein the oil inlet, the oil return port, the first oil port and the second oil port are all formed on the servo valve; An electromagnetic reversing valve, an electrical signal of which is connected to the servo valve, and the electromagnetic reversing valve is used to control the oil circuit direction of the servo valve; A stop valve, the oil inlet, the first oil port and the second oil port are all provided with the stop valve, and the stop valve is used to control the cut-off or conduction of the pipeline; Wherein, the electromagnetic reversing valve is signal-connected to the stop valve.

9. The hydraulic control circuit for the winding roller according to claim 8, characterized in that: The stop valve is a cartridge valve.

10. The hydraulic control circuit for the winding roller according to any one of claims 1 to 9, characterized in that: Also includes: A pressure sensor, the first oil circuit and the second oil circuit are both provided with the pressure sensor, the pressure sensor is used to detect the pressure information of the first oil circuit and the second oil circuit; An accumulator is used to be arranged between the hydraulic source and the main control circuit unit.

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