Hydraulic control device and method for sintering machine distributing device

Abstract

The invention discloses a hydraulic control device and method for a sintering machine distributor, the device comprises an oil pumping system, a distribution direction control system, an overpressure protection system and a distribution system, the oil pumping system is connected with an oil tank of the device through a pipeline and used for providing hydraulic oil for the device; the material distribution direction control system is connected with the oil pumping system and the overpressure protection system through pipelines and is used for controlling the material distribution direction of the material distributor; the overpressure protection system is connected with the material distribution system and the oil pumping system through pipelines and is used for adjusting the pressure in the device; the material distribution system is connected with the material distribution direction control system and the overpressure protection system through pipelines and used for implementing material distribution operation. Through the technical scheme provided by the invention, the stability of the sintering machine distributor for distributing can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of hydraulic control of a sintering machine feeder, and particularly relates to a hydraulic control device and method for a sintering machine feeder. Background Art

[0002] In the feeder of a sintering machine, the performance of the hydraulic control device will have a greater impact on the feeding effect of the feeder, and the quality of the feeding effect will affect the quality of the working effect of the sintering machine. Therefore, to keep the working effect of the sintering machine in a better state, the hydraulic control device of the feeder needs to have better performance to ensure a better feeding effect of the feeder. However, in the prior art, the hydraulic control device of the feeder has problems such as low energy utilization rate, large commutation impact, and poor sensitivity to load, which will lead to a reduction in the stability of the feeding effect of the feeder. Based on this, how to improve the stability of the feeding process of the sintering machine feeder is a technical problem to be solved urgently. Summary of the Invention

[0003] An embodiment of this application provides a hydraulic control device and method for a sintering machine feeder, which can at least improve the stability of the feeding of the sintering machine feeder to a certain extent.

[0004] Other features and advantages of this application will become apparent through the following detailed description, or be learned in part through the practice of this application.

[0005] According to the first aspect of the embodiments of this application, a hydraulic control device for a sintering machine feeder is provided, characterized in that the device includes a pump oil system, a cloth feeding direction control system, an overpressure protection system, and a cloth feeding system. Among them, the pump oil system is connected to the fuel tank of the device through a pipeline and is used to provide hydraulic oil for the device; the cloth feeding direction control system is connected to the pump oil system and the overpressure protection system through pipelines and is used to control the cloth feeding direction of the feeder; the overpressure protection system is connected to the cloth feeding system and the pump oil system through pipelines and is used to adjust the pressure inside the device; the cloth feeding system is connected to the cloth feeding direction control system and the overpressure protection system through pipelines and is used to perform the cloth feeding operation.

[0006] In some embodiments of the present application, based on the foregoing solutions, the oil pumping system at least includes a make-up oil pump, a make-up oil overflow valve, a filter, and a differential pressure alarm. Among them, the make-up oil pump is connected to the fuel tank through a pipeline and is used to transport hydraulic oil from the fuel tank into the device; the make-up oil overflow valve is connected to the make-up oil pump and the fuel tank through pipelines and is used to control the pressure of the hydraulic oil not to exceed a preset pressure; the filter is connected to the make-up oil pump through a pipeline and is used to filter impurities in the hydraulic oil; the differential pressure alarm is connected to both ends of the filter and is used to detect the differential pressure across the filter, and when the differential pressure across the filter is greater than a preset differential pressure, an alarm signal is issued.

[0007] In some embodiments of the present application, based on the foregoing solutions, the fabric direction control system at least includes a pilot valve, a servo valve, a variable driver, and an inclined plate type double plunger pump. Among them, the pilot valve is connected to the filter through a pipeline and controls the flow direction of the hydraulic oil by switching the position of the valve core to control the position of the valve core of the servo valve; the servo valve is connected to the pilot valve, the filter, and the variable driver through pipelines and controls the flow direction of the hydraulic oil by switching the position of the valve core to control the moving direction of the piston of the mechanical feedback mechanism of the variable driver; the variable driver is connected to the servo valve through a pipeline and controls the rotation direction of the swash plate of the inclined plate type double plunger pump through the moving direction of the piston of the mechanical feedback mechanism to control the flow direction and flow rate of the hydraulic oil pumped out by the inclined plate type double plunger pump; the inclined plate type double plunger pump is connected to the variable driver and is used to provide hydraulic oil for the fabric system.

[0008] In some embodiments of the present application, based on the foregoing solutions, the overpressure protection system at least includes a first overflow valve, a first throttle valve, a first balance valve, a second overflow valve, a second throttle valve, and a second balance valve. Among them, the first throttle valve is connected to the fabric system and the first overflow valve through pipelines and is used to control the flow rate of the hydraulic oil; the first overflow valve is connected to the variable driver and the first throttle valve through pipelines and controls the piston of the mechanical feedback mechanism to move to the right according to the blockage of the fabric system; the first balance valve is connected to the inclined plate type double plunger pump and the fabric system through pipelines and is used to control the pressure of the fabric system; the second throttle valve is connected to the fabric system and the second overflow valve through pipelines and is used to control the flow rate of the hydraulic oil; the second overflow valve is connected to the variable driver and the second throttle valve through pipelines and controls the piston of the mechanical feedback mechanism to move to the left according to the blockage of the fabric system; the second balance valve is connected to the inclined plate type double plunger pump and the fabric system through pipelines and is used to control the pressure of the fabric system.

[0009] In some embodiments of the present application, based on the foregoing solution, the cloth feeding system includes a first hydraulic cylinder, a second hydraulic cylinder, a cloth feeding trolley, a relief valve, a first position detection point, and a second position detection point. Among them, the first hydraulic cylinder is connected to the first throttle valve and the first balance valve through pipelines, and is used to control the cloth feeding trolley to move leftward; the second hydraulic cylinder is connected to the second throttle valve and the second balance valve through pipelines, and is used to control the cloth feeding trolley to move rightward; the cloth feeding trolley is connected to the piston rods of both the first hydraulic cylinder and the second hydraulic cylinder, and is used to load raw materials and implement cloth feeding; the relief valve is connected to the first hydraulic cylinder, the second hydraulic cylinder, and the fuel tank through pipelines, and is used to release the pressure in the first hydraulic cylinder or the second hydraulic cylinder when the movement of the cloth feeding trolley is blocked; the first position detection point is set at the end of the path where the cloth feeding trolley moves leftward, and when detecting the end of the path where the cloth feeding trolley moves leftward, it sends a spool switching signal to the pilot valve; the second position detection point is set at the end of the path where the cloth feeding trolley moves rightward, and when detecting the end of the path where the cloth feeding trolley moves rightward, it sends a spool switching signal to the pilot valve.

[0010] According to the second aspect of the embodiments of the present application, there is provided a hydraulic control method for a sintering machine cloth feeder, characterized in that the method includes: controlling a makeup oil pump to pump hydraulic oil from a fuel tank, and controlling the pressure of the hydraulic oil not to exceed a preset pressure through a makeup oil overflow valve; based on a preset moving direction of a cloth feeding trolley, controlling the spool position of a pilot valve, and based on the spool position of the pilot valve, controlling the flow direction of the hydraulic oil to control the spool position of a servo valve; based on the spool position of the servo valve, controlling the moving direction of a piston of a mechanical feedback mechanism of a variable driver, and according to the moving direction of the piston of the mechanical feedback mechanism, controlling the flow direction and flow rate of the hydraulic oil pumped out by an inclined plate type double plunger pump; based on the flow direction of the hydraulic oil, controlling the cloth feeding trolley to move and start cloth feeding.

[0011] In some embodiments of the present application, based on the foregoing solution, the controlling the spool position of the pilot valve based on the preset moving direction of the cloth feeding trolley, and controlling the flow direction of the hydraulic oil based on the spool position of the pilot valve to control the spool position of the servo valve includes: if the preset moving direction of the cloth feeding trolley is to move leftward, controlling the parallel spool of the pilot valve to be turned on, the hydraulic oil passes through the pilot valve and flows into the servo valve, so that the parallel spool of the servo valve is turned on; if the preset moving direction of the cloth feeding trolley is to move rightward, controlling the cross spool of the pilot valve to be turned on, the hydraulic oil passes through the pilot valve and flows into the servo valve, so that the cross spool of the servo valve is turned on.

[0012] In some embodiments of the present application, based on the foregoing solution, controlling the movement direction of the piston of the mechanical feedback mechanism of the variable driver based on the spool position of the servo valve, and controlling the flow direction and flow rate of the hydraulic oil pumped by the swash plate type double plunger pump according to the movement direction of the piston of the mechanical feedback mechanism, includes: if the parallel spool of the servo valve is connected, the hydraulic oil flows into the left chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the right, driving the swash plate of the swash plate type double plunger pump to rotate clockwise, so that the hydraulic oil pumped by the swash plate type double plunger pump flows into the first hydraulic cylinder, and the greater the degree of rotation of the swash plate, the greater the flow rate of the hydraulic oil pumped by the swash plate type double plunger pump; if the cross spool of the servo valve is connected, the hydraulic oil flows into the right chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the left, driving the swash plate of the swash plate type double plunger pump to rotate counterclockwise, so that the hydraulic oil pumped by the swash plate type double plunger pump flows into the second hydraulic cylinder, and the greater the degree of rotation of the swash plate, the greater the flow rate of the hydraulic oil pumped by the swash plate type double plunger pump.

[0013] In some embodiments of the present application, based on the foregoing solution, controlling the movement of the cloth trolley based on the flow direction of the hydraulic oil, includes: if the hydraulic oil flows into the first hydraulic cylinder, the cloth trolley moves to the left; if the hydraulic oil flows into the second hydraulic cylinder, the cloth trolley moves to the right.

[0014] In some embodiments of the present application, based on the foregoing solution, the method further includes: if the cloth trolley moves to the position of the first detection point, controlling the pilot valve to switch to the cross spool connected; if the cloth trolley moves to the position of the second detection point, controlling the pilot valve to switch to the parallel spool connected.

[0015] Based on the technical solution proposed by the present application, by setting an overpressure protection system, it is possible to prevent the internal pressure of the device from being too high, avoid damage to the device, and can also be used to adjust the internal pressure of the device to ensure that the internal pressure of the device can remain stable, thereby ensuring that the device can stably distribute the cloth and improving the cloth distribution effect; by setting a cloth direction control system, the flexibility of the cloth distributor during the cloth distribution process can be improved, and the accuracy of the cloth distribution process of the cloth distributor can also be improved. By setting a pump oil system and adopting a pump control device, the energy utilization rate can be improved, thereby improving the production efficiency; generally speaking, by controlling the cloth distributor to distribute the cloth through the hydraulic control device, the cloth distribution efficiency of the cloth distributor can be effectively improved, and the stability of the cloth distribution process of the cloth distributor can also be improved.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Description of the Drawings

[0017] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application. Obviously, the accompanying drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of a hydraulic control device for a sintering machine feeder in an embodiment of this application is shown;

[0019] Figure 2 A flowchart of a hydraulic control method for a sintering machine feeder in an embodiment of this application is shown. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0021] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a full understanding of the embodiments of this application. However, those skilled in the art will realize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0022] The block diagrams shown in the accompanying drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the accompanying drawings are only exemplary illustrations, not necessarily including all contents and operations / steps, nor necessarily executed in the described order. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined. Therefore, the actual execution order may change according to the actual situation.

[0024] It should be noted that the "multiple" mentioned in this text refers to two or more. The "and / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0025] It should also be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described.

[0026] To enable those skilled in the art to better understand this application, first, a brief description will be given of the hydraulic control of the sintering machine feeder proposed in this application.

[0027] In the feeder of the sintering machine, the performance of the hydraulic control device will have a greater impact on the feeding effect of the feeder, and the quality of the feeding effect will affect the quality of the working effect of the sintering machine. Therefore, to keep the working effect of the sintering machine in a better state, the hydraulic control device of the feeder needs to have better performance to ensure a better feeding effect of the feeder. However, in the prior art, the hydraulic control device of the feeder has problems such as low energy utilization rate, large commutation impact and poor sensitivity to load, which will lead to a decrease in the stability of the feeding effect of the feeder. Based on this, how to improve the stability of the feeding process of the sintering machine feeder is a technical problem to be solved urgently. Therefore, the inventors of this application have proposed a hydraulic control device and method for the sintering machine feeder to improve the stability of the sintering of the sintering machine.

[0028] Next, it will be combined with Figure 1 to elaborate in detail on the hydraulic control device of the sintering machine feeder proposed in this application.

[0029] Such as Figure 1As shown, a schematic diagram of a hydraulic control device for a sintering machine feeder in an embodiment of the present application is shown. Among them, the hydraulic control device can at least include an oil pumping system, a cloth feeding direction control system, an overpressure protection system, and a cloth feeding system. Among them, the oil pumping system is connected to the oil tank 1 of the device through a pipeline and can be used to provide hydraulic oil for the device; the cloth feeding direction control system is connected to the oil pumping system and the overpressure protection system through pipelines and can be used to control the cloth feeding direction of the feeder; the overpressure protection system is connected to the cloth feeding system and the oil pumping system through pipelines and can be used to adjust the pressure inside the device; the cloth feeding system is connected to the cloth feeding direction control system and the overpressure protection system through pipelines and can be used to implement the cloth feeding operation.

[0030] In the present application, by setting an overpressure protection system, it is possible to prevent the pressure inside the device from being too high, avoid damage to the device, and can also be used to adjust the internal pressure of the device to ensure that the internal pressure of the device can remain stable, and further ensure that the device can cloth stably and improve the cloth feeding effect; by setting a cloth feeding direction control system, the flexibility of the feeder during the cloth feeding process can be improved, and the accuracy of the cloth feeding process of the feeder can also be improved. By setting an oil pumping system and using a pump control device, the utilization rate of energy can be improved, and thus the production efficiency can be improved; generally speaking, by controlling the feeder to implement cloth feeding through the hydraulic control device, the cloth feeding efficiency of the feeder can be effectively improved, and the stability of the cloth feeding process of the feeder can also be improved.

[0031] Please continue to refer to Figure 1 In the present application, the oil pumping system can at least include a makeup oil pump 4, a makeup oil overflow valve 5, a filter 6, and a differential pressure alarm 7. Among them, the makeup oil pump 4 is connected to the oil tank 1 through a pipeline and can be used to transport hydraulic oil from the oil tank 1 into the device; the makeup oil overflow valve 5 is connected to the makeup oil pump 4 and the oil tank 1 through pipelines and can be used to control the pressure of the hydraulic oil not to exceed the preset pressure; the filter 6 is connected to the makeup oil pump 7 through a pipeline and can be used to filter impurities in the hydraulic oil; the differential pressure alarm 7 is connected to both ends of the filter 6 and can be used to detect the differential pressure at both ends of the filter 6, and when the differential pressure at both ends of the filter 6 is greater than the preset differential pressure, an alarm signal can be issued.

[0032] In the present application, the specific preset differential pressure can be 2.5 bar or 3 bar. According to actual needs, the preset differential pressure can also be other values. In this regard, the present application does not make specific limitations.

[0033] In this application, by setting up a make-up oil overflow valve, the pressure of the hydraulic oil in the device can be ensured not to exceed the preset pressure, which helps protect the device from damage caused by excessive pressure, can extend the service life of the equipment, and can also improve the stability of the operation of the device. By setting up a filter, it can be used to filter impurities in the hydraulic oil, which helps maintain the cleanliness of the hydraulic oil, reduces system failures caused by impurities, improves the stability and operation efficiency of the device. In addition, by setting up a differential pressure alarm device at both ends of the filter, it can be used to detect the pressure difference at both ends of the filter. When the pressure difference at both ends of the filter is too large, it indicates that the filter may be damaged or the filter element is blocked. Therefore, the differential pressure alarm device emits an alarm signal to remind the operator to repair the filter or replace the filter element in time, avoiding damage to the device caused by the filter failure, and further improving the stability of the sintering machine feeder during feeding.

[0034] Please continue to refer to Figure 1 , in this application, the fabric feeding direction control system can at least include a pilot valve 9, a servo valve 13, a variable driver 14, and an inclined plate type double plunger pump 3. Among them, the pilot valve 9 is connected to the filter 6 through a pipeline, and the flow direction of the hydraulic oil can be controlled by switching the position of the valve core to control the position of the valve core of the servo valve. On the pipeline connecting the pilot valve 9 and the filter 6, a direction control throttle valve 8 is provided, which can be used to control the flow rate of the hydraulic oil. The servo valve 13 is connected to the pilot valve 9, the filter 6, and the variable driver 14 through pipelines, and the flow direction of the hydraulic oil can be controlled by switching the position of the valve core to control the moving direction of the piston of the mechanical feedback mechanism of the variable driver 14. The variable driver 14 is connected to the servo valve 13 through a pipeline, and the rotating direction of the swash plate of the inclined plate type double plunger pump 4 can be controlled by the moving direction of the piston of the mechanical feedback mechanism to control the flow direction and flow rate of the hydraulic oil pumped out by the inclined plate type double plunger pump 4. The inclined plate type double plunger pump 4 is connected to the variable driver 14 and can be used to provide hydraulic oil for the fabric feeding system.

[0035] Please continue to refer to Figure 1, the cross spool of the pilot valve 9 can be used to connect the right chamber of the servo valve 13 and the filter. When the hydraulic oil enters the right chamber of the servo valve 13 through the cross spool of the pilot valve 9, the cross spool of the servo valve 13 will be connected to the right chamber of the variable driver 14 and the filter 6 respectively under the pressure of the hydraulic oil. When the hydraulic oil flows into the right chamber of the variable driver, the piston of the mechanical feedback mechanism moves leftward, thereby controlling the counterclockwise rotation of the swash plate of the swash plate type double plunger pump 4; the parallel spool of the pilot valve 9 can be used to connect the left chamber of the servo valve 13 and the filter 6. When the hydraulic oil enters the left chamber of the servo valve 13 through the parallel spool of the pilot valve 9, the parallel spool of the servo valve will be connected to the left chamber of the variable driver 14 and the filter 6 respectively under the pressure of the hydraulic oil. When the hydraulic oil flows into the left chamber of the variable driver, the piston of the mechanical feedback mechanism moves rightward, thereby controlling the clockwise rotation of the swash plate of the swash plate type double plunger pump 4.

[0036] In the present application, the spool position of the servo valve is controlled by using the pilot valve. The servo valve can further control the moving direction of the piston of the mechanical feedback mechanism of the variable driver. Finally, the rotation direction of the swash plate of the swash plate type double plunger pump is controlled by the variable driver. By combining the use of the pilot valve, the servo valve and the variable driver, the accuracy of controlling the flow direction and flow rate of the hydraulic oil can be improved, and the stability of the fabric system can also be improved; in addition, by arranging the swash plate type double plunger pump, the flow rate and flow direction of the pumped hydraulic oil can be flexibly adjusted, which helps the device to adapt to different fabric situations and improve the application range of the device.

[0037] Please continue to refer to Figure 1, in the present application, the overpressure protection system at least includes a first overflow valve 15, a first throttle valve 16, a first balance valve 17, a second overflow valve 22, a second throttle valve 21 and a second balance valve 20. Among them, the first throttle valve 16 is connected to the cloth conveying system and the first overflow valve 15 through a pipeline, and can be used to control the flow rate of the hydraulic oil; the first overflow valve 15 is connected to the variable driver 14 and the first throttle valve 16 through a pipeline, and can control the piston of the mechanical feedback mechanism to move to the right according to the blockage of the cloth conveying system; the first balance valve 17 is connected to the swashplate type double plunger pump 3 and the cloth conveying system through a pipeline, and can be used to control the pressure of the cloth conveying system; the second throttle valve 21 is connected to the cloth conveying system and the second overflow valve 22 through a pipeline, and can be used to control the flow rate of the hydraulic oil; the second overflow valve 22 is connected to the variable driver 14 and the second throttle valve 21 through a pipeline, and can control the piston of the mechanical feedback mechanism to move to the left according to the blockage of the cloth conveying system; the second balance valve 20 is connected to the swashplate type double plunger pump 3 and the cloth conveying system through a pipeline, and can be used to control the pressure of the cloth conveying system.

[0038] Please continue to refer to Figure 1 , taking the leftward movement of the cloth trolley as an example, the hydraulic oil is pumped out from the swashplate type double plunger pump 3 and flows into the rod chamber of the first hydraulic cylinder 27, pushing the piston of the first hydraulic cylinder 27 to move to the left. If the piston movement of the first hydraulic cylinder 27 encounters a blockage, and when the pressure generated by the hydraulic oil due to the blockage exceeds a certain value, the first overflow valve 15 will open, increasing the flow rate of the hydraulic oil flowing into the left chamber of the variable driver 14, so that the piston of the mechanical feedback mechanism moves further to the right, and further causing the swashplate of the swashplate type double plunger pump 3 to rotate clockwise to a greater extent, and the swashplate type double plunger pump 3 pumps out a greater flow rate of hydraulic oil to the first hydraulic cylinder 27 to offset the blockage encountered by the piston movement of the first hydraulic cylinder 27, ensuring that the cloth trolley can move smoothly and at a constant speed; if the pressure generated by the hydraulic oil due to the blockage exceeds the normal pressure range of the device, the first balance valve 17 will open, connecting the oil outlet and the oil inlet of the swashplate type double plunger pump 3, making the swashplate type double plunger pump 3 idle to release the pressure generated by the hydraulic oil due to the blockage and protecting the normal operation of the device.

[0039] If the trolley moves to the right and the piston of the second hydraulic cylinder 28 encounters a blockage during movement, the second relief valve 22 will open, increasing the flow rate of the hydraulic oil flowing into the right chamber of the variable drive 14, driving the swashplate type double plunger pump 3 to rotate counterclockwise to a greater extent, and causing the swashplate type double plunger pump 3 to pump out a greater flow rate of hydraulic oil to the second hydraulic cylinder 28; if the pressure generated by the blockage of the hydraulic oil exceeds the normal pressure range of the device, the second balance valve 20 will open to release the pressure generated by the blockage of the hydraulic oil and protect the normal operation of the device.

[0040] In this application, by providing the first relief valve and the second relief valve, the pressure inside the device can be prevented from being too high, and the pressure fluctuation inside the device can also be adjusted to ensure the stability of the cloth. The first throttle valve and the second throttle valve can be used to control the flow rate of the hydraulic oil to improve the accuracy of the control of the flow rate of the hydraulic oil. The first balance valve and the second balance valve are provided to help prevent the pressure inside the device from exceeding the normal working pressure and avoid damage to the device caused by excessive pressure, thereby improving the stability of the cloth feeding of the sintering machine feeder to a certain extent.

[0041] Please continue to refer to Figure 1 In this application, the cloth feeding system includes a first hydraulic cylinder 27, a second hydraulic cylinder 28, a cloth feeding trolley 31, a unloading valve 32, a first position detection point 29, and a second position detection point 30. Among them, the first hydraulic cylinder 27 is respectively connected to the first throttle valve 16 and the first balance valve 17 through pipelines and can be used to control the leftward movement of the cloth feeding trolley 31; the second hydraulic cylinder 26 is respectively connected to the second throttle valve 21 and the second balance valve 20 through pipelines and can be used to control the rightward movement of the cloth feeding trolley; the cloth feeding trolley is connected to the piston rods of both the first hydraulic cylinder 27 and the second hydraulic cylinder 28, and the cloth feeding trolley 31 is used to load raw materials and perform cloth feeding; the unloading valve 32 is connected to the first hydraulic cylinder 27, the second hydraulic cylinder 28, and the fuel tank 1 through pipelines and can be used to release the pressure in the first hydraulic cylinder 27 or the second hydraulic cylinder 28 when the cloth feeding trolley 31 encounters a blockage during movement; the first position detection point 29 is set at the end of the path of the leftward movement of the cloth feeding trolley 31, and when it detects the end of the path of the leftward movement of the cloth feeding trolley, it can send a spool switching signal to the pilot valve 9; the second position detection point 30 is set at the end of the path of the rightward movement of the cloth feeding trolley 31, and when it detects the end of the path of the rightward movement of the cloth feeding trolley 30, it can send a spool switching signal to the pilot valve 9.

[0042] Please continue to refer to Figure 1, when the fabric trolley 31 moves to the left and the piston of the second hydraulic cylinder 28 moves to the left and encounters an obstruction, the right spool of the unloading valve 32 connects to the unloading overflow valve 33, causing the hydraulic oil in the rod chamber of the second hydraulic cylinder 28 to connect to the fuel tank 1. Similarly, when the fabric trolley 31 moves to the right and the piston of the first hydraulic cylinder 27 moves to the right and encounters an obstruction, the left spool of the unloading valve 32 connects to the unloading overflow valve 33, causing the hydraulic oil in the rod chamber of the first hydraulic cylinder 27 to connect to the fuel tank 1 to release the pressure generated by the obstruction of the hydraulic oil; in this way, the smooth movement of the fabric trolley can be ensured and the fabric can be evenly distributed.

[0043] In this application, by setting the first hydraulic cylinder and the second hydraulic cylinder, two-way movement control of the fabric trolley to the left and right can be achieved. This design makes the fabric process more flexible and can adapt to different fabric requirements. Setting the unloading valve can provide safety protection for the fabric system. When the movement of the fabric trolley encounters an obstruction, the pressure in the first hydraulic cylinder and the second hydraulic cylinder can be released through the unloading valve to prevent damage caused by excessive system pressure, thereby effectively improving the stability of the fabric distribution of the sintering machine fabricator.

[0044] Next, it will be combined with Figure 2 to elaborate in detail on the hydraulic control method of the sintering machine fabricator proposed in this application.

[0045] As Figure 2 shown, it shows the flowchart of the hydraulic control method of the sintering machine fabricator in an embodiment of this application. As shown in the figure, the hydraulic control method of the sintering machine fabricator described in this application can at least include the following steps 110 to step 140:

[0046] Step 110, control the make-up oil pump to pump hydraulic oil from the fuel tank and control the pressure of the hydraulic oil not to exceed the preset pressure through the make-up oil overflow valve.

[0047] Step 120, based on the preset moving direction of the fabric trolley, control the spool position of the pilot valve, and based on the spool position of the pilot valve, control the flow direction of the hydraulic oil to control the spool position of the servo valve.

[0048] Step 130, based on the spool position of the servo valve, control the moving direction of the piston of the mechanical feedback mechanism of the variable driver, and according to the moving direction of the piston of the mechanical feedback mechanism, control the flow direction and flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump.

[0049] Step 140, based on the flow direction of the hydraulic oil, control the movement of the fabric trolley and start fabric distribution.

[0050] In this application, first, a makeup oil pump pumps hydraulic oil from the fuel tank, and a makeup oil overflow valve controls the pressure of the hydraulic oil not to exceed a preset pressure. This step can ensure the stable and controllable pressure inside the hydraulic device, preventing system damage or potential safety hazards caused by excessive pressure. Secondly, by controlling the spool position of the pilot valve and based on the spool position of the pilot valve, controlling the flow direction of the hydraulic oil, and then controlling the spool position of the servo valve. This control logic enables the movement direction of the cloth trolley to be adjusted flexibly to meet the requirements of direction control for different cloth feeding needs. By accurately controlling the pressure and flow rate of the hydraulic oil and controlling the direction of the trolley, the stability of the sintering machine feeder for cloth feeding can be effectively enhanced, the reliability of the device can be improved, and the service life can be extended.

[0051] In step 120 above, based on the preset movement direction of the cloth trolley, controlling the spool position of the pilot valve and based on the spool position of the pilot valve, controlling the flow direction of the hydraulic oil to control the spool position of the servo valve can be performed at least according to the following steps 121 to 122:

[0052] Step 121, if the preset movement direction of the cloth trolley is to move left, then control the parallel spool of the pilot valve to be connected, and the hydraulic oil passes through the pilot valve and flows into the servo valve, causing the parallel spool of the servo valve to be connected.

[0053] Step 122, if the preset movement direction of the cloth trolley is to move right, then control the cross spool of the pilot valve to be connected, and the hydraulic oil passes through the pilot valve and flows into the servo valve, causing the cross spool of the servo valve to be connected.

[0054] In this application, by controlling the connection state of the spool of the pilot valve to control the flow direction of the hydraulic oil and then controlling the connection state of the spool of the servo valve, the accuracy of the direction control of the cloth trolley can be improved. At the same time, by using the pilot valve and the servo valve for control, the trolley can move according to the preset movement direction, which can meet different cloth feeding needs, improve the adaptability of the hydraulic control device, and also improve the stability of the sintering machine feeder for cloth feeding.

[0055] In step 130 above, based on the spool position of the servo valve, controlling the movement direction of the piston of the mechanical feedback mechanism of the variable driver and according to the movement direction of the piston of the mechanical feedback mechanism, controlling the flow direction and flow rate of the hydraulic oil pumped out by the swash plate double plunger pump can be performed at least according to the following steps 131 to 132:

[0056] Step 131, if the parallel spool of the servo valve is turned on, the hydraulic oil flows into the left chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the right, driving the swash plate of the swash plate type double plunger pump to rotate clockwise, causing the hydraulic oil pumped out by the swash plate type double plunger pump to flow into the first hydraulic cylinder, and the greater the degree of swash plate rotation, the greater the flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump.

[0057] Step 132, if the cross spool of the servo valve is turned on, the hydraulic oil flows into the right chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the left, driving the swash plate of the swash plate type double plunger pump to rotate counterclockwise, causing the hydraulic oil pumped out by the swash plate type double plunger pump to flow into the second hydraulic cylinder, and the greater the degree of swash plate rotation, the greater the flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump.

[0058] In this application, the pilot valve is used to control the spool position of the servo valve, and the servo valve further controls the moving direction of the piston of the mechanical feedback mechanism of the variable driver. Finally, the swash plate rotation direction of the swash plate type double plunger pump is controlled through the variable driver. By using the combination of the pilot valve, servo valve and variable driver, the accuracy of controlling the flow direction and flow rate of the hydraulic oil can be improved, and the stability of the cloth feeding system can also be improved; in addition, by setting the swash plate type double plunger pump, the flow rate and direction of the pumped hydraulic oil can be flexibly adjusted, which helps the device adapt to different cloth feeding situations and improves the application range of the device.

[0059] In the above step 140, controlling the movement of the cloth feeding trolley based on the flow direction of the hydraulic oil can be performed at least according to the following steps 141 to 142:

[0060] Step 141, if the hydraulic oil flows into the first hydraulic cylinder, the cloth feeding trolley moves to the left.

[0061] Step 142, if the hydraulic oil flows into the second hydraulic cylinder, the cloth feeding trolley moves to the right.

[0062] In this application, by controlling the movement direction of the trolley through the flow direction of the hydraulic oil pumped out by the swash plate type double plunger pump, that is, adopting a pump control method, the energy utilization rate can be improved, energy loss can be reduced, the energy-saving effect of the hydraulic device can be improved, and by controlling the movement direction of the trolley through the flow direction of the hydraulic oil, the commutation impact can be effectively reduced, the pipeline can be protected, the service life of the device can be extended, and at the same time, the stability of the cloth feeding of the sintering machine cloth feeder can also be improved.

[0063] In the hydraulic control method of the sintering machine cloth feeder proposed in this application, the method may further include the following steps 143 and 144:

[0064] Step 143: If the fabric trolley moves to the position of the first detection point, control the pilot valve to switch to the cross spool connection.

[0065] Step 144: If the fabric trolley moves to the position of the second detection point, control the pilot valve to switch to the parallel spool connection.

[0066] In this application, by setting detection points to detect the moving position of the fabric trolley, the automatic control of the reciprocating movement of the fabric trolley can be realized, thereby improving the stability of the moving process of the fabric trolley, ensuring that the fabric range of the fabric trolley can meet the process requirements. In addition, by setting detection points and switching the spool of the pilot valve to control the moving direction of the fabric trolley, the fabric trolley can be prevented from stopping for a long time during fabric distribution, so as to improve the uniformity and stability of the fabric trolley during fabric distribution.

[0067] Based on the technical solution proposed in this application, by setting an overpressure protection system, the internal pressure of the device can be prevented from being too high, avoiding damage to the device, and it can also be used to adjust the internal pressure of the device to ensure that the internal pressure of the device can remain stable, thereby ensuring that the device can distribute fabric stably and improving the fabric distribution effect; by setting a fabric direction control system, the flexibility of the fabric distributor during fabric distribution can be improved, and the accuracy of the fabric distribution process of the fabric distributor can also be improved. By setting a pump oil system and adopting a pump control device, the energy utilization rate can be improved, thereby improving the production efficiency; generally speaking, by controlling the fabric distributor to distribute fabric through the hydraulic control device, the fabric distribution efficiency of the fabric distributor can be effectively improved, and the stability of the fabric distribution process of the fabric distributor can also be improved.

[0068] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A hydraulic control device for a sintering machine feeder, characterized in that, The device includes an oil pumping system, a cloth feeding direction control system, an overpressure protection system, and a cloth feeding system. Among them, the oil pumping system is connected to the fuel tank of the device through a pipeline and is used to provide hydraulic oil for the device; the cloth feeding direction control system is connected to the oil pumping system and the overpressure protection system through pipelines and is used to control the cloth feeding direction of the cloth feeder; the overpressure protection system is connected to the cloth feeding system and the oil pumping system through pipelines and is used to adjust the pressure inside the device; the cloth feeding system is connected to the cloth feeding direction control system and the overpressure protection system through pipelines and is used to perform the cloth feeding operation.

2. The device according to claim 1, characterized in that The oil pumping system at least includes a makeup oil pump, a makeup oil overflow valve, a filter, and a differential pressure alarm. Among them, the makeup oil pump is connected to the fuel tank through a pipeline and is used to transport hydraulic oil from the fuel tank into the device; the makeup oil overflow valve is connected to the makeup oil pump and the fuel tank through pipelines and is used to control the pressure of the hydraulic oil not to exceed the preset pressure; the filter is connected to the makeup oil pump through a pipeline and is used to filter impurities in the hydraulic oil; the differential pressure alarm is connected to both ends of the filter and is used to detect the differential pressure at both ends of the filter. And when the differential pressure at both ends of the filter is greater than the preset differential pressure, an alarm signal is issued.

3. The system device according to claim 2, characterized in that, The cloth feeding direction control system at least includes a pilot valve, a servo valve, a variable drive, and an inclined plate type double plunger pump. Among them, the pilot valve is connected to the filter through a pipeline and controls the flow direction of the hydraulic oil by switching the spool position to control the spool position of the servo valve; the servo valve is connected to the pilot valve, the filter, and the variable drive through pipelines and controls the flow direction of the hydraulic oil by switching the spool position to control the piston movement direction of the mechanical feedback mechanism of the variable drive; the variable drive is connected to the servo valve through a pipeline and controls the inclined plate rotation direction of the inclined plate type double plunger pump through the piston movement direction of the mechanical feedback mechanism to control the flow direction and flow rate of the hydraulic oil pumped out by the inclined plate type double plunger pump; the inclined plate type double plunger pump is connected to the variable drive and is used to provide hydraulic oil for the cloth feeding system.

4. The device according to claim 3, characterized in that The overpressure protection system at least includes a first overflow valve, a first throttle valve, a first balance valve, a second overflow valve, a second throttle valve, and a second balance valve. Among them, the first throttle valve is connected to the cloth feeding system and the first overflow valve through pipelines and is used to control the flow rate of the hydraulic oil; the first overflow valve is connected to the variable drive and the first throttle valve through pipelines and controls the piston of the mechanical feedback mechanism to move to the right according to the blockage of the cloth feeding system; the first balance valve is connected to the inclined plate type double plunger pump and the cloth feeding system through pipelines and is used to control the pressure of the cloth feeding system; the second throttle valve is connected to the cloth feeding system and the second overflow valve through pipelines and is used to control the flow rate of the hydraulic oil; the second overflow valve is connected to the variable drive and the second throttle valve through pipelines and controls the piston of the mechanical feedback mechanism to move to the left according to the blockage of the cloth feeding system; The second balance valve is connected to the swash plate type double plunger pump and the cloth feeding system through pipelines, and is used to control the pressure of the cloth feeding system.

5. The device according to claim 4, wherein The cloth feeding system includes a first hydraulic cylinder, a second hydraulic cylinder, a cloth feeding trolley, a relief valve, a first position detection point and a second position detection point. Among them, The first hydraulic cylinder is connected to the first throttle valve and the first balance valve through pipelines, and is used to control the cloth feeding trolley to move leftward; The second hydraulic cylinder is connected to the second throttle valve and the second balance valve through pipelines, and is used to control the cloth feeding trolley to move rightward; The cloth feeding trolley is connected to the piston rods of both the first hydraulic cylinder and the second hydraulic cylinder, and is used to load raw materials and carry out cloth feeding; The relief valve is connected to the first hydraulic cylinder, the second hydraulic cylinder and the oil tank through pipelines. When the movement of the cloth feeding trolley is blocked, it is used to release the pressure in the first hydraulic cylinder or the second hydraulic cylinder; The first position detection point is set at the end of the path where the cloth feeding trolley moves leftward. When it detects the end of the path where the cloth feeding trolley moves leftward, it sends a spool switching signal to the pilot valve; The second position detection point is set at the end of the path where the cloth feeding trolley moves rightward. When it detects the end of the path where the cloth feeding trolley moves rightward, it sends a spool switching signal to the pilot valve.

6. A hydraulic control method for a sintering machine feeder, characterized in that The method includes: Controlling the make-up oil pump to pump hydraulic oil from the oil tank, and controlling the pressure of the hydraulic oil not to exceed a preset pressure through the make-up oil overflow valve; Based on the preset moving direction of the cloth feeding trolley, controlling the spool position of the pilot valve, and based on the spool position of the pilot valve, controlling the flow direction of the hydraulic oil to control the spool position of the servo valve; Based on the spool position of the servo valve, controlling the moving direction of the piston of the mechanical feedback mechanism of the variable driver, and according to the moving direction of the piston of the mechanical feedback mechanism, controlling the flow direction and flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump; Based on the flow direction of the hydraulic oil, controlling the movement of the cloth feeding trolley to start cloth feeding.

7. The method according to claim 6, characterized in that, The step of based on the preset moving direction of the cloth feeding trolley, controlling the spool position of the pilot valve, and based on the spool position of the pilot valve, controlling the flow direction of the hydraulic oil to control the spool position of the servo valve includes: If the preset moving direction of the cloth feeding trolley is to move leftward, controlling the parallel spool of the pilot valve to be connected, and the hydraulic oil passes through the pilot valve and flows into the servo valve, so that the parallel spool of the servo valve is connected; If the preset moving direction of the cloth feeding trolley is to move rightward, controlling the cross spool of the pilot valve to be connected, and the hydraulic oil passes through the pilot valve and flows into the servo valve, so that the cross spool of the servo valve is connected.

8. The method according to claim 7, wherein The step of based on the spool position of the servo valve, controlling the moving direction of the piston of the mechanical feedback mechanism of the variable driver, and according to the moving direction of the piston of the mechanical feedback mechanism, controlling the flow direction and flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump includes: If the parallel spool of the servo valve is opened, the hydraulic oil flows into the left chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the right, driving the swash plate of the swash plate type double plunger pump to rotate clockwise, so that the hydraulic oil pumped out by the swash plate type double plunger pump flows into the first hydraulic cylinder, and the greater the degree of rotation of the swash plate, the greater the flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump; If the cross spool of the servo valve is opened, the hydraulic oil flows into the right chamber of the variable driver, driving the piston of the mechanical feedback mechanism to move to the left, driving the swash plate of the swash plate type double plunger pump to rotate counterclockwise, so that the hydraulic oil pumped out by the swash plate type double plunger pump flows into the second hydraulic cylinder, and the greater the degree of rotation of the swash plate, the greater the flow rate of the hydraulic oil pumped out by the swash plate type double plunger pump.

9. The method according to claim 8, wherein Controlling the movement of the cloth trolley based on the flow direction of the hydraulic oil includes: If the hydraulic oil flows into the first hydraulic cylinder, the cloth trolley moves to the left; If the hydraulic oil flows into the second hydraulic cylinder, the cloth trolley moves to the right.

10. The method according to claim 9, wherein The method further includes: If the cloth trolley moves to the position of the first detection point, controlling the pilot valve to switch to the cross spool being opened; If the cloth trolley moves to the position of the second detection point, controlling the pilot valve to switch to the parallel spool being opened.

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