A hydraulic quick forging machine multi-path control system

Abstract

This invention belongs to the field of hydraulic technology for heavy machinery equipment, specifically relating to a multi-channel control system for a hydraulic high-speed forging machine. It includes an energy storage mechanism, a control oil tank, and a controller. At least two sets of parallel power supply devices and at least two sets of parallel cooling devices are connected to the control oil tank. Each power supply device is connected to the energy storage mechanism and supplies control oil to the main system of the hydraulic high-speed forging machine. Each cooling device dissipates heat from the oil in the control oil tank. Each power supply device and cooling device is connected to the controller. The system also includes an oil replenishment mechanism and an oil discharge mechanism, each connected at one end to the control oil tank and at the other end to the main oil tank. This invention solves the problem in existing hydraulic control systems where the control system cannot continue operating if any component fails, significantly improving equipment efficiency and reducing production costs.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic technology for heavy machinery and equipment, and specifically relates to a multi-channel control system for a hydraulic high-speed forging machine. Background Technology

[0002] As an important component of high-speed forging machines, the hydraulic system works on the following principle: the hydraulic pump outputs power, and the control valves control the opening and closing of the oil circuit, the flow rate, and the pressure to drive the actuators, that is, to drive the hydraulic cylinders to push the moving beam of the high-speed forging machine to move up and down. During the movement of the moving beam, the forging fixture is driven to deform the material according to the predetermined process route, thereby obtaining the required structure and performance.

[0003] Currently, the hydraulic systems of large high-speed forging mills utilize a large number, variety, and size of control valves. To achieve better control precision and dynamic performance, the hydraulic system is divided into a main system and a control system. The main hydraulic system uses various control valves to control the return and descent of the forging mill's moving beam, driving the main cylinder to forge the material. The control system controls the opening and closing of various control valves in the main system, as well as the magnitude and duration of their opening, to precisely control the forging speed and frequency of the large high-speed forging mill. While this independent hydraulic control system for high-speed forging mills is simple in principle and easy to maintain, it has the following shortcomings during long-term use. These shortcomings are mainly reflected in the following aspects:

[0004] 1) If any component fails during use, the control system will be unable to continue working, which will cause the high-speed forging machine to malfunction.

[0005] 2) For convenience, hydraulic system oil tanks are usually designed to be relatively small. This can easily lead to the oil temperature rising too quickly when the ambient temperature is high, the air circulation is poor, and the machine is not stopped to cool down until the oil temperature is within the optimal operating range. Long-term use under these conditions will cause the oil to be in a high-temperature environment, which will cause the oil to deteriorate rapidly and thus affect the effective and stable operation of the entire high-speed forging machine hydraulic system.

[0006] 3) In terms of maintenance or repair mode, this control system usually adopts shutdown maintenance or parts replacement maintenance. The long waiting time is not conducive to the connection between the preceding and following production processes and restricts the increase in output. Although it can be combined with the current mainstream TPM management mode, the frequency of temporary failures and downtime can be reduced by reasonably arranging planned maintenance time, but it cannot shorten the repair time in case of sudden failure.

[0007] 4) During operation of the high-speed forging machine, wear of the main valve seal of the proportional servo valve can cause communication between the main oil circuit and the control oil circuit. If oil from the main oil circuit enters the control oil tank, it will overflow, resulting in resource waste and environmental pollution. If oil from the pilot valve flows into the main system, severely reducing the oil level in the control oil tank, it can easily cause the hydraulic pump supplying oil to the pilot valve to cavitate, leading to pump damage and scrapping. It can also cause the cooling oil pump to cavitate and become unusable. Once a pump fails, the entire high-speed forging machine will be shut down and unable to operate normally, severely impacting production. It will also cause unnecessary consumption of spare parts such as pumps and motors, increasing the company's costs.

[0008] 5) If the filtration system is missing, metal shavings generated by damage to either the control pump or the cooling pump may enter the main system and cause damage to the control valves, or even the hydraulic cylinders and pumps.

[0009] In view of this, the inventors provide a multi-channel control system for a hydraulic high-speed forging machine to solve the above-mentioned technical problems. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and propose a multi-channel control system for a hydraulic high-speed forging machine, which solves the problem that the existing control system is too simple in design and has serious defects that make it difficult for the entire hydraulic system to be effective, continuous and stable.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A multi-channel control system for a hydraulic high-speed forging machine includes an energy storage mechanism and a control oil tank. At least two sets of parallel power supply devices and at least two sets of parallel cooling devices are connected to the control oil tank. Each power supply device is connected to the energy storage mechanism. Each power supply device supplies control oil to the main system of the hydraulic high-speed forging machine. Each cooling device dissipates heat and cools the oil in the control oil tank. Each power supply device and cooling device is connected to a controller.

[0013] It also includes an oil replenishment mechanism and an oil discharge mechanism, one end of which is connected to the control oil tank and the other end of which is connected to the main oil tank.

[0014] Furthermore, each of the aforementioned power supply devices includes a control pump connected to the controller. One end of the control pump is connected to the control oil tank via a first pipe, and the other end is connected to the energy storage mechanism via a second pipe.

[0015] Furthermore, on the second pipeline, in the direction from the control pump to the energy storage mechanism, there are sequentially arranged a first overflow valve, a first pressure sensor, a first pressure gauge, a first check valve, a first shut-off valve, a first filter, a second pressure gauge, and a first control unit. One end of a tenth pipeline is connected between the first check valve and the first shut-off valve, and the other end of the tenth pipeline is connected between the first check valve and the first shut-off valve on the second pipeline of any other energy supply device, forming a system in which each energy supply device has two first filters connected in parallel.

[0016] A second shut-off valve is installed on the tenth pipeline;

[0017] The first overflow valve is also connected to the control oil tank;

[0018] Both the first pressure sensor and the first filter are connected to the controller.

[0019] Furthermore, a second control unit is provided on the first pipeline. The first control unit and the second control unit are identical, both including a second check valve and a fourth shut-off valve.

[0020] Furthermore, the control oil tank is equipped with a level controller and a temperature sensor connected to the controller. The level controller is used to monitor the oil level in the control oil tank and transmit the measurement data to the controller.

[0021] Furthermore, each of the cooling devices includes a cooling oil pump connected to the controller. One end of the cooling oil pump is connected to the control oil tank via a third pipe, and the other end is connected to one end of a heat exchanger connected to the controller via a fourth pipe. The other end of the heat exchanger is connected to the control oil tank via a fifth pipe.

[0022] Furthermore, each of the cooling devices also includes a second overflow valve, one end of which is connected to a third pipe and the other end of which is connected to a fourth pipe.

[0023] Furthermore, a third shut-off valve is connected to the third pipeline;

[0024] A second flow meter, a second pressure measuring interface, and a second filter are sequentially installed on the fifth pipeline from the heat exchanger to the control oil tank.

[0025] The fourth pipe is provided with a fourth shut-off valve, a fifth shut-off valve, a first flow meter, and a first pressure measuring interface in sequence from the cooling oil pump to the heat exchanger. One end of the eleventh pipe is connected between the fourth shut-off valve and the fifth shut-off valve. The other end of the eleventh pipe is connected between the fourth shut-off valve and the fifth shut-off valve on the fourth pipe of any other cooling device, so that each cooling device has two heat exchangers and two second filters connected in parallel.

[0026] The eleventh pipeline is equipped with a fifth shut-off valve;

[0027] The first flow meter, the second flow meter, and the second filter are all connected to the controller.

[0028] Furthermore, the oil replenishment mechanism includes a third overflow valve and an oil replenishment pump connected to the controller. One end of the oil replenishment pump is connected to the control oil tank through a sixth pipe, and the other end is connected to the main oil tank through a seventh pipe. One end of the third overflow valve is connected to the sixth pipe, and the other end is connected to the seventh pipe.

[0029] The oil discharge mechanism includes a fourth overflow valve and an oil discharge pump connected to the controller. One end of the oil discharge pump is connected to the main oil tank through an eighth pipe, and the other end is connected to the control oil tank through a ninth pipe. One end of the fourth overflow valve is connected to the eighth pipe, and the other end is connected to the ninth pipe.

[0030] Furthermore, a sixth shut-off valve is installed on the sixth, seventh, eighth, and ninth pipes.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) This invention provides a multi-channel control system for a hydraulic high-speed forging machine, equipped with at least two sets of parallel power supply devices. One set supplies oil to the pilot valve of the proportional servo valve while the other is on standby, reducing the frequency of downtime and maintenance time due to control system failures, significantly improving the efficiency of the high-speed forging machine, and thus increasing production capacity. The multiple power supply devices can be actively and quickly switched periodically or temporarily as needed, solving the problem in existing hydraulic control systems where the control system cannot continue operating if any component fails. Additionally, at least two sets of parallel cooling devices are provided, with one set on standby. If one set fails, the other can be immediately switched on. This does not affect the cooling of the control oil tank, solving the problem of rapid oil deterioration caused by frequent high-temperature environments. Periodic switching also extends the lifespan of the cooling devices. Furthermore, both power supply and cooling devices include filters. In this structure, the filters operate continuously without interruption, thus solving the problem of metal shavings entering the main system and damaging control valves, hydraulic cylinders, and even pumps due to the lack of a filtration system.

[0033] 2) The present invention provides a multi-channel control system for a hydraulic high-speed forging machine, which is equipped with a temperature sensor on the control oil tank. The temperature sensor and the cooling oil pump are connected to the controller. The operation and stop of the cooling oil pump are controlled by the oil temperature, which can save energy and extend the service life of the cooling oil pump.

[0034] 3) The multi-channel control system for a hydraulic high-speed forging machine provided by this invention includes an oil replenishment mechanism and an oil discharge mechanism on the control oil tank. The oil replenishment mechanism prevents the control pump and cooling oil pump from running dry due to insufficient oil in the control oil tank, which could lead to pump damage or even failure of the entire hydraulic system of the high-speed forging machine. The oil discharge mechanism discharges oil from the control oil tank to the main oil tank when the oil level is higher than a set value, preventing oil overflow from the control oil tank, saving resources, and protecting the environment. This invention significantly improves equipment efficiency and reduces production costs.

[0035] 4) The present invention provides a multi-channel control system for a hydraulic high-speed forging machine. The power supply device and the cooling device can realize the rapid switching between the two systems and various combinations within the power supply device. This avoids the combination and switching when the functions are the same in a single mechanism and there is no simultaneous failure. It can also increase the filtration area when there are many impurities in the oil and achieve rapid cooling of the oil in a short time. Attached Figure Description

[0036] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the multi-channel control system for the hydraulic high-speed forging machine of the present invention.

[0039] Where: 1 represents the energy storage mechanism;

[0040] 2 is the control oil tank; 21 is the level controller;

[0041] 3 is the main fuel tank;

[0042] 4 is the power supply device; 41 is the control pump; 42 is the first relief valve; 43 is the first pressure sensor; 44 is the first pressure gauge; 45 is the first check valve; 46 is the second pressure gauge; 47 is the first control unit; 48 is the second control unit; 49 is the first shut-off valve.

[0043] 5 is a cooling device; 50 is a cooling oil pump; 51 is a heat exchanger; 52 is a second overflow valve; 53 is a fifth shut-off valve; 54 is a fourth shut-off valve; 55 is a first flow meter; 56 is a first pressure measuring interface; 57 is a second flow meter; 58 is a second pressure measuring interface; 59 is a second filter;

[0044] 6 is the oil replenishment mechanism; 61 is the oil replenishment pump; 62 is the third overflow valve;

[0045] 7 is the oil discharge mechanism; 71 is the oil discharge pump; 72 is the fourth overflow valve;

[0046] 8 is the first filter. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0048] In response to our company's requirement that certain materials cannot be recycled during hydraulic high-speed forging, this invention was designed to enable the hydraulic high-speed forging machine to continue operating until the material processing is completed. Existing hydraulic high-speed forging machines will stop operating if an accident occurs midway, which no longer meets our company's needs.

[0049] Please see Figure 1 This invention provides a multi-channel control system for a hydraulic high-speed forging machine, including an energy storage mechanism 1 and a control oil tank 2. The control oil tank 2 is connected to two sets of parallel power supply devices 4 and two sets of parallel cooling devices 5. Each power supply device 4 is connected to the energy storage mechanism 1, and each power supply device 4 is used to supply control oil to the main system of the hydraulic high-speed forging machine. Each cooling device 5 is used to dissipate heat and cool the oil in the control oil tank 2. Each power supply device 4 and cooling device 5 is connected to a controller; specifically, the controller is a PLC controller.

[0050] It also includes an oil replenishment mechanism 6 and an oil discharge mechanism 7, one end of which is connected to the control oil tank 2, and the other end of which is connected to the main oil tank 3.

[0051] Specifically, the energy storage mechanism 1, also known as the energy storage device, is used in the system to absorb and release system energy during the switching of the high-speed forging machine and to balance the pressure fluctuations of the control system.

[0052] In this embodiment, the control system is configured with two sets of power supply devices 4 connected in parallel to supply oil to the pilot valve of the main system's proportional servo valve to control the opening, closing, and opening amount of the main valve. The two sets of power supply devices 4 can be quickly switched. When one set of power supply device 4 fails or the pipeline connected to it is damaged and leaks oil, requiring a shutdown, that power supply device 4 can be stopped and switched to the other set of power supply device 4, allowing the entire hydraulic system to continue operating without affecting the orderly progress of production.

[0053] Furthermore, each power supply device 4 includes a control pump 41 connected to the controller. One end of the control pump 41 is connected to the control oil tank 2 through a first pipe, and the other end is connected to the energy storage mechanism 1 through a second pipe.

[0054] Furthermore, each power supply unit 4 includes a flexible connection to the control pump 41 for easy disassembly and vibration absorption.

[0055] Furthermore, on the second pipeline, in the direction from the control pump 41 to the energy storage mechanism 1, a first overflow valve 42, a first pressure sensor 43, a first pressure gauge 44, a first check valve 45, a first shut-off valve 49, a first filter 8, a second pressure gauge 46, and a first control unit 47 are sequentially arranged. One end of a tenth pipeline is connected between the first check valve 45 and the first shut-off valve 49, and the other end of the tenth pipeline is connected between the first check valve 45 and the first shut-off valve 49 on the second pipeline of any other set of energy supply devices 4, so that each set of energy supply devices 4 has two first filters 8 connected in parallel.

[0056] A second shut-off valve is installed on the tenth pipeline;

[0057] The first overflow valve 42 is also connected to the control oil tank 2;

[0058] Both the first pressure sensor 43 and the first filter 8 are connected to the controller.

[0059] Specifically, the control pump 41 is a high-pressure pump; the first relief valve 42 is an electromagnetic relief valve used to control the pump head of the control pump 41; and the first pressure sensor 43 is used to measure the pressure on the second pipeline.

[0060] It should be noted that in the two sets of parallel power supply devices 4 in this invention, the combination mode is "control pump group + filter device". By changing the opening / closing of the corresponding pipeline valves, multiple working modes of the two sets of power supply devices 4 can be realized, such as "1 set of control pump group + 2 sets of filter devices" or "1 set of control pump group + filter device in another set of power supply devices". Through combination, the rapid switching and online maintenance of each mechanism of the two sets of power supply devices 4 can be realized.

[0061] Furthermore, a second control unit 48 is provided on the first pipeline. The first control unit 47 and the second control unit 48 are identical, both including a second check valve and a seventh shut-off valve.

[0062] In this embodiment, a second control unit 48 is provided at the oil inlet of each control pump 41 (the seventh shut-off valve of the second control unit 48 is mainly described here). The opening and closing of the seventh shut-off valve is monitored by the controller, and the control pump 41 can only be started when the seventh shut-off valve is fully open. Since the main system only needs to start one control pump 41 to meet the requirements during use, the other control pump 41 is in a non-working state. To prevent accidental operation, the corresponding seventh shut-off valve is closed. When switching is required, the switching can be achieved by controlling the seventh shut-off valve corresponding to each control pump 41. Switching must be performed according to the usage situation. For example, if one control pump 41 fails, it needs to be switched to another control pump 41; it can also be actively switched periodically to extend the service life of a single control pump 41.

[0063] Furthermore, the control oil tank 2 is equipped with a level controller 21 and a temperature sensor connected to the controller. The level controller 21 is used to monitor the oil level in the control oil tank 2 and transmit the measurement data to the controller.

[0064] Furthermore, each cooling device 5 includes a cooling oil pump 50 connected to a controller. One end of the cooling oil pump 50 is connected to the control oil tank 2 via a third pipe, and the other end is connected to one end of a heat exchanger 51 connected to the controller via a fourth pipe. The other end of the heat exchanger 51 is connected to the control oil tank 2 via a fifth pipe. Specifically, the cooling oil pump 50, the control oil tank 2, and the heat exchanger 51 are connected through various pipes to form a loop.

[0065] Each cooling device 5 also includes a second overflow valve 52, one end of which is connected to a third pipe and the other end is connected to a fourth pipe.

[0066] In addition, a third shut-off valve is connected to the third pipeline;

[0067] On the fifth pipeline, from the heat exchanger 51 to the control oil tank 2, a second flow meter 57, a second pressure measuring interface 58 and a second filter 59 are sequentially installed.

[0068] The fourth pipeline is provided with a fourth shut-off valve 54, a fifth shut-off valve 53, a first flow meter 55, and a first pressure measuring interface 56 in sequence from the cooling oil pump 50 to the heat exchanger 51. One end of an eleventh pipeline is connected between the fourth shut-off valve 54 and the fifth shut-off valve 53. The other end of the eleventh pipeline is connected between the fourth shut-off valve 54 and the fifth shut-off valve 53 on the fourth pipeline of any other cooling device 5, so that each cooling device 5 has two heat exchangers 51 and two second filters 59 connected in parallel.

[0069] The eleventh pipeline is equipped with a fifth shut-off valve.

[0070] The first flow meter 55, the second flow meter 57, and the second filter 59 are all connected to the controller.

[0071] It should be noted that the combination mode of the two parallel cooling devices 5 in this invention is "hydraulic pump group + heat exchange device". By changing the opening / closing of the corresponding pipeline valves, multiple working modes of the two cooling devices 5 can be realized, such as "1 cooling oil pump group + 2 heat exchange and filtration devices" or "1 cooling oil pump group + heat exchange and filtration device in another cooling device". Through combination, the rapid switching of each mechanism of the two cooling devices and online maintenance can be realized.

[0072] In this embodiment, the control system is configured with two sets of cooling devices 5 connected in parallel to cool the oil in the control oil tank 2, employing a "one-in-use, one-out-of-charge" working mode. Specifically, each cooling oil pump 50 is independently equipped with a heat exchanger 51, which is a plate heat exchanger. Each cooling device 5 can operate independently and can be switched, or both cooling devices 5 can be put into use simultaneously when the ambient temperature is very high. The usage process is as follows:

[0073] When the temperature sensor on the control oil tank 2 detects that the oil temperature is higher than the normal operating setpoint, the motor of the cooling oil pump 50 starts, driving the pump to carry the oil from the control oil tank 2 into the plate heat exchanger for heat exchange with the cooling medium, rapidly cooling the high-temperature oil in the control oil tank 2. When the oil temperature in the control oil tank 2 drops to the set normal operating setpoint, the cooling oil pump 50 stops working. The next time the oil temperature in the control oil tank 2 exceeds the setpoint again, the motor of the cooling oil pump 50 will automatically start again, driving the pump to carry the high-temperature oil into the plate heat exchanger for heat exchange with the cooling medium. This process is automatically controlled by the temperature sensor and PLC. This process saves energy and reduces consumption.

[0074] In this embodiment, the fifth shut-off valve 53 is a shut-off valve with a limit switch. To ensure that the cooling oil pump 50 does not suck in cavitation, a fifth shut-off valve 53 is installed on the third pipeline (i.e., the oil suction port pipeline of the cooling oil pump 50). The cooling oil pump 50 can only be started when the fifth shut-off valve 53 is fully open, so that the limit switch sends an electrical signal to the controller. At the same time, the fifth shut-off valve 53 is also used for equipment maintenance. For example, when it is necessary to clean the control oil tank 2, weld oil leaks in the pipeline, or replace and maintain the heat exchanger 51, the fifth shut-off valve 53 is closed to prevent residual oil in the cooling oil pump 50 oil circuit from entering the control oil tank 2 and to prevent oil in the control oil tank 2 from flowing out through the cooling oil pump 50 when replacing the heat exchanger 51.

[0075] In this embodiment, the second relief valve 52 is a low-pressure safety relief valve. Since oil heat exchange does not require high pressure, and only involves introducing oil from the control oil tank 2 into the plate heat exchanger, a low-pressure safety relief valve is chosen. This low-pressure safety relief valve is located at the outlet of the cooling oil pump 50. The purpose of setting up the low-pressure relief valve is to prevent a portion of the oil in the cooling oil pump 50 from flowing back to the control oil tank 2 through the second relief valve in case of blockage in the outlet pipe of the cooling oil pump 50. This allows the cooling oil pump 50 and its pipes to release pressure, preventing pressure buildup and protecting the cooling oil pump 50, its components, and accessories from damage. It also extends the service life of the cooling oil pump 50. Another purpose of setting up the low-pressure safety relief valve is to prevent the pressure in the entire cooling oil circuit from exceeding the allowable pressure of the plate heat exchanger, which could cause leakage and failure of the plate heat exchanger.

[0076] Furthermore, the oil replenishment mechanism 6 includes a third overflow valve 62 and an oil replenishment pump 61 connected to the controller. The outlet of the oil replenishment pump 61 is connected to the control oil tank 2 through a sixth pipe, and the inlet is connected to the main oil tank 3 through a seventh pipe. One end of the third overflow valve 62 is connected to the sixth pipe, and the other end is connected to the seventh pipe.

[0077] The oil discharge mechanism 7 includes a fourth overflow valve 72 and an oil discharge pump 71 connected to the controller. One end of the oil discharge pump 71 is connected to the main oil tank 3 via an eighth pipe, and the other end is connected to the control oil tank 2 via a ninth pipe. One end of the fourth overflow valve 72 is connected to the eighth pipe, and the other end is connected to the ninth pipe. The oil flow direction of the replenishing pump 61 and the third overflow valve 62 is from the main oil tank 3 to the control oil tank 2; the oil flow direction of the oil discharge pump 71 and the fourth overflow valve 72 is from the control oil tank 2 to the main oil tank 3.

[0078] In addition, a sixth shut-off valve is installed on the sixth, seventh, eighth, and ninth pipelines.

[0079] Specifically, when the level controller 21 on the control oil tank 2 detects that the oil level is lower than the set level, the motor of the replenishing oil pump 61 starts, driving the replenishing oil pump 61 to draw oil from the main oil tank 3. The replenishing oil pump 61 replenishes the control oil tank 2 by drawing oil from the main oil tank 3. After the oil level in the control oil tank 2 reaches the set level, the replenishing oil pump 61 stops working. This process is automatically controlled by the level controller 21 and the PLC.

[0080] To prevent the replenishing pump 61 from drawing in cavitation, a sixth shut-off valve is installed on the oil suction port pipe of the replenishing pump 61. This sixth shut-off valve is a shut-off valve with a limit switch. The replenishing pump 61 can only be started when the sixth shut-off valve is open, causing the limit switch to send an electrical signal to the PLC. The sixth shut-off valve is also used during equipment maintenance, such as when cleaning the control oil tank 2, welding leaks in the pipeline, or closing the sixth shut-off valve during troubleshooting.

[0081] Specifically, the third relief valve 62 is a low-pressure safety relief valve. This low-pressure safety relief valve is located at the outlet of the replenishing pump 61. Since replenishing oil does not require high pressure, it is simply a matter of transferring oil from one tank to another. The purpose of setting up the low-pressure relief valve is to prevent some of the oil from the replenishing pump 61 from flowing back to the main oil tank 3 through the third relief valve 62 in case of blockage in the outlet pipeline of the replenishing pump 61. This achieves pressure relief of the pump body and pipeline without pressure buildup, protecting the replenishing pump 61, its components, and accessories from damage. This also extends the service life of the replenishing pump 61.

[0082] Specifically, when the level controller 21 on the control oil tank 2 detects that the oil level is higher than the set level, the motor of the drain pump 71 starts, driving the drain pump 71 to drain the oil from the control oil tank 2 into the main oil tank 3. When the oil level in the control oil tank 2 reaches the set normal operating level, the drain pump 71 stops working. This process is automatically controlled by the level controller 21 and the PLC.

[0083] To prevent the oil pump 71 from drawing in cavitation, a shut-off valve with a limit switch is installed on the oil inlet pipe of the oil pump 71. The oil pump 71 can only be started when the shut-off valve is open, causing the limit switch to send an electrical signal to the PLC. This shut-off valve is also used during equipment maintenance, such as when cleaning the control oil tank 2, welding leaks in the pipeline, or troubleshooting. It closes the shut-off valve to prevent residual oil in the oil circuit of the oil pump 71 from entering the control oil tank 2 and to prevent backflow into the control oil tank 2 in case the ball valve of the main oil tank 3 fails.

[0084] Specifically, the outlet of the oil discharge pump 71 is equipped with a low-pressure safety relief valve. Since high pressure is not required for oil discharge, it is simply a matter of transferring oil from one tank to another. The purpose of the low-pressure relief valve is to prevent some or all of the oil from the oil discharge pump 71 from flowing back to the control tank 2 through the valve in case of blockages in the outlet pipeline of the oil discharge pump 71, or accidental closure of the ball valve on the main oil tank 3 and the outlet pipeline of the oil discharge pump 71. This allows for pressure relief of the pump body and pipelines without causing pressure buildup, protecting the oil discharge pump 71, its components, and accessories from damage, and extending the service life of the oil discharge pump 71.

[0085] In this embodiment, the volume of the control oil tank 2 is at least twice that of the existing hydraulic high-speed forging machine control oil tank 2, which has a volume of 1.2 m³. This reduces the rate of oil temperature rise and controls the oil temperature while maintaining the same operating conditions. Furthermore, the area of ​​the heat exchanger 51 in this control system is at least twice that of the existing hydraulic high-speed forging machine control system heat exchanger 51, which has a total heat exchange area of ​​12 m². Increasing the heat exchange area of ​​the heat exchanger 51 improves its heat exchange efficiency, which also reduces the rate of oil temperature rise and controls the oil temperature. This ensures that the oil does not undergo quality changes due to temperature, maintaining good performance. The lower oil temperature also protects the seals of the hydraulic valves in the control system and the proportional servo valves in the main system.

[0086] In this embodiment, a control switching program is set on the controller PLC. This control switching program enables rapid switching of operations between the two power supply devices 4 and between the two cooling devices 5. The oil replenishment mechanism 6 and the oil discharge mechanism 7 are automatically started or stopped to ensure that the liquid level in the control oil tank 2 is in the optimal working range.

[0087] It should be noted that the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth pipes are all hydraulic pipelines.

[0088] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0089] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A multi-channel control system for a hydraulic high-speed forging machine, comprising an energy storage mechanism (1) and a control oil tank (2), characterized in that, The control oil tank (2) is connected to at least two sets of parallel power supply devices (4) and at least two sets of parallel cooling devices (5). Each set of power supply devices (4) is connected to the energy storage mechanism (1). Each set of power supply devices (4) is used to supply control oil to the main system of the hydraulic high-speed forging machine. Each set of cooling devices (5) is used to dissipate heat and cool the oil in the control oil tank (2). Each set of power supply devices (4) and cooling devices (5) is connected to a controller. At least two sets of parallel power supply devices (4) can switch between each other to serve as backups for each other, and at least two sets of parallel cooling devices (5) can switch between each other to serve as backups for each other. Each of the aforementioned power supply devices (4) includes a control pump (41) connected to a controller. One end of the control pump (41) is connected to the control oil tank (2) via a first pipe, and the other end is connected to the energy storage mechanism (1) via a second pipe. On the second pipe, in the direction from the control pump (41) to the energy storage mechanism (1), a first overflow valve (42), a first pressure sensor (43), a first pressure gauge (44), a first check valve (45), a first shut-off valve (49), a first filter (8), a second pressure gauge (46), and a first control unit (47) are arranged in sequence. One end of a tenth pipe is connected between the first check valve (45) and the first shut-off valve (49). The other end of the tenth pipe is connected between the first check valve (45) and the first shut-off valve (49) on the second pipe of any other power supply device (4), forming a system in which each power supply device (4) has two first filters (8) connected in parallel. Each of the cooling devices (5) includes a cooling oil pump (50) connected to the controller. One end of the cooling oil pump (50) is connected to the control oil tank (2) through a third pipe, and the other end is connected to one end of a heat exchanger (51) connected to the controller through a fourth pipe. The other end of the heat exchanger (51) is connected to the control oil tank (2) through a fifth pipe. It also includes an oil replenishment mechanism (6) and an oil discharge mechanism (7), one end of which is connected to the control oil tank (2), and the other end of which is connected to the main oil tank (3).

2. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, A second shut-off valve is installed on the tenth pipeline; The first overflow valve (42) is also connected to the control oil tank (2); Both the first pressure sensor (43) and the first filter (8) are connected to the controller.

3. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, A second control unit (48) is provided on the first pipe.

4. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, The control oil tank (2) is equipped with a level controller (21) and a temperature sensor connected to the controller. The level controller (21) is used to monitor the oil level in the control oil tank (2) and transmit the measurement data to the controller.

5. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, Each of the cooling devices (5) further includes a second overflow valve (52), one end of which is connected to a third pipe and the other end of which is connected to a fourth pipe.

6. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, A third shut-off valve is connected to the third pipeline; On the fifth pipeline, a second flow meter (57), a second pressure measuring interface (58) and a second filter (59) are sequentially arranged in the direction from the heat exchanger (51) to the control oil tank (2). The fourth pipe is provided with a fourth shut-off valve (54), a fifth shut-off valve (53), a first flow meter (55), and a first pressure measuring interface (56) in sequence from the cooling oil pump (50) to the heat exchanger (51). An eleventh pipe is connected between the fourth shut-off valve (54) and the fifth shut-off valve (53). The other end of the eleventh pipe is connected between the fourth shut-off valve (54) and the fifth shut-off valve (53) on the fourth pipe of any other cooling device (5), so that each cooling device (5) has two heat exchangers (51) and two second filters (59) connected in parallel. The eleventh pipeline is equipped with a fifth shut-off valve; The first flow meter (55), the second flow meter (57), and the second filter (59) are all connected to the controller.

7. The multi-channel control system for a hydraulic high-speed forging machine according to claim 1, characterized in that, The oil replenishment mechanism (6) includes a third overflow valve (62) and an oil replenishment pump (61) connected to the controller. One end of the oil replenishment pump (61) is connected to the control oil tank (2) through the sixth pipe, and the other end is connected to the main oil tank (3) through the seventh pipe. One end of the third overflow valve (62) is connected to the sixth pipe, and the other end is connected to the seventh pipe. The oil discharge mechanism (7) includes a fourth overflow valve (72) and an oil discharge pump (71) connected to the controller. One end of the oil discharge pump (71) is connected to the main oil tank (3) through the eighth pipe, and the other end is connected to the control oil tank (2) through the ninth pipe. One end of the fourth overflow valve (72) is connected to the eighth pipe, and the other end is connected to the ninth pipe.

8. The multi-channel control system for a hydraulic high-speed forging machine according to claim 7, characterized in that, The sixth shut-off valve is installed on the sixth, seventh, eighth and ninth pipes.

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