Multi-path control system of hydraulic fast forging machine

Abstract

The invention belongs to the technical field of hydraulic pressure of heavy mechanical equipment, and particularly relates to a multi-path control system of a hydraulic fast forging machine, which comprises an energy storage mechanism, a control oil tank and a controller, the control oil tank is respectively connected with at least two sets of energy supply devices connected in parallel and at least two sets of cooling devices connected in parallel, each set of energy supply device is connected with the energy storage mechanism, and the controller is connected with the energy storage mechanism. Each set of energy supply device is used for providing control oil for a main system of the hydraulic fast forging machine, and each set of cooling device is used for cooling oil in a control oil tank; each set of energy supply device and cooling device is connected with a controller; one end of the oil supplementing mechanism and one end of the oil discharging mechanism are connected with the control oil tank, and the other end of the oil supplementing mechanism and the other end of the oil discharging mechanism are connected with a main oil tank. According to the hydraulic control system, the problem that when any element in the hydraulic control system in the prior art breaks down, the control system cannot continue to work is solved, the use efficiency of equipment is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic pressure of heavy machinery and equipment, and in particular relates to a multi-channel control system of a hydraulic fast forging machine. Background Art

[0002] As an important part of the high-speed forging machine, the hydraulic system has the following main working principles: the hydraulic pump outputs the power source, and each control valve controls the on-off of the oil circuit, the size of the flow rate, and the level of pressure to drive the actuator, that is, to drive the hydraulic cylinder to push the movable beam of the high-speed forging machine up and down. During the movement of the movable beam, the forging tooling is driven according to the established process route to achieve the deformation of the material, and then obtain the required structure and performance.

[0003] At present, the control valves used in the hydraulic system of large-scale fast forging machines are numerous, of many types, and of larger specifications. In order to make the fast forging machine have better control accuracy and better dynamic performance, the hydraulic system of the fast forging machine is divided into two parts: the main system and the control system. The hydraulic main system of the fast forging machine uses various control valves to execute the return and descent of the movable beam of the fast forging machine, and drives the main cylinder to forge the material. The control system is used to control the opening and closing of various control valves in the main system, as well as the size of the opening amount and the length of time, so as to achieve the purpose of accurately controlling the forging speed and frequency of large-scale fast forging machines. This type of independent control hydraulic system of the fast forging machine has a simple principle and is easy to maintain, but it will have the following shortcomings in long-term use. It is mainly reflected in the following aspects:

[0004] 1) If any component fails during use, the control system will not be able to continue working, which will cause the fast forging machine to fail to work normally;

[0005] 2) For convenience, the hydraulic system oil tank is usually designed to be relatively small. In this way, when the ambient temperature is high and the air flow is poor, the oil temperature rises too quickly when working for a long time, and the machine needs to be stopped to cool down until the oil temperature is in the optimal working range. Long-term use in this state causes the oil to be often in a high temperature environment, causing the oil to deteriorate quickly and thus affecting the effective and stable operation of the entire high-speed forging machine hydraulic system;

[0006] 3) In terms of repair or maintenance mode, this control system usually uses shutdown repair or replacement repair. The long waiting time is not conducive to the connection between the previous and next production processes, which restricts the increase in production. Although it can be combined with the current mainstream TPM management mode, it can reasonably arrange the planned maintenance time to reduce the frequency of temporary failures and downtime, but it cannot shorten the maintenance time in the event of sudden failure;

[0007] 4) During the use of the fast forging machine, the main oil circuit and the control oil circuit of the proportional servo valve are interconnected due to wear of the seal of the main valve of the proportional servo valve. If the oil in the main oil circuit enters the control oil tank, it will cause oil overflow, resulting in waste of resources and environmental pollution; if the oil of the pilot valve flows into the main system, the oil in the control oil tank will be seriously reduced, which may easily cause the hydraulic pump supplying oil to the pilot valve to be emptied and damaged, and the cooling oil pump may be emptied and damaged. Once the pump is damaged, the entire fast forging machine will be shut down and unable to work normally, which will have a serious impact on 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 chips generated by damage to the control pump or cooling pump may enter the main system and cause damage to the control valve or even the hydraulic cylinder and pump.

[0009] In view of this, the inventor provides a multi-channel control system for a hydraulic rapid forging machine to solve the above technical problems. Summary of the invention

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

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A multi-channel control system for a hydraulic fast forging machine, comprising an energy storage mechanism and a control oil tank, wherein the control oil tank is respectively connected with at least two sets of parallel energy supply devices and at least two sets of parallel cooling devices, each set of the energy supply devices is connected with the energy storage mechanism, each set of the energy supply devices is used to provide control oil to the main system of the hydraulic fast forging machine, and each set of the cooling devices is used to dissipate heat and cool the oil in the control oil tank; each set of the energy supply devices and cooling devices is connected with a controller;

[0013] It also includes an oil replenishing mechanism and an oil discharging mechanism, one end of each of the oil replenishing mechanism and the oil discharging mechanism is connected to the control oil tank, and the other end of each of the oil replenishing mechanism and the oil discharging mechanism is connected to the main oil tank.

[0014] Furthermore, each set of the energy supply device includes a control pump connected to the controller, one end of the control pump is connected to the control oil tank through a first pipeline, and the other end of the control pump is connected to the energy storage mechanism through a second pipeline.

[0015] Further, the second pipeline is provided with a first overflow valve, a first pressure sensor, a first pressure gauge, a first one-way valve, a first stop valve, a first filter, a second pressure gauge and a first control unit in sequence in the direction from the control pump to the energy storage mechanism, one end of a tenth pipeline is connected between the first one-way valve and the first stop valve, and the other end of the tenth pipeline is connected between the first one-way valve and the first stop valve on the second pipeline of any other energy supply device, so that each energy supply device is connected in parallel with two first filters;

[0016] The tenth pipeline is provided with a second stop valve;

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

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

[0019] Furthermore, a second control unit is arranged on the first pipeline. The first control unit and the second control unit are the same, and both include a second one-way valve and a fourth stop valve.

[0020] Furthermore, a liquid level controller and a temperature sensor connected to the controller are installed on the control oil tank, and the liquid level controller is used to monitor the oil height in the control oil tank and transmit the measurement data to the controller.

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

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

[0023] Furthermore, the third pipeline is connected with a third stop valve;

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

[0025] A fourth stop valve, a fifth stop valve, a first flow meter, and a first pressure measuring interface are sequentially arranged on the fourth pipeline in a direction from the cooling oil pump to the heat exchanger, and one end of an eleventh pipeline is connected between the fourth stop valve and the fifth stop valve, and the other end of the eleventh pipeline is connected between the fourth stop valve and the fifth stop valve on the fourth pipeline of any other set of cooling devices, so that each set of cooling devices is connected in parallel with two heat exchangers and two second filters;

[0026] The eleventh pipeline is provided with a fifth stop valve;

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

[0028] Further, 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 pipeline, and the other end is connected to the main oil tank through a seventh pipeline, one end of the third overflow valve is connected to the sixth pipeline, and the other end is connected to the seventh pipeline;

[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 pipeline, and the other end is connected to the control oil tank through a ninth pipeline, and one end of the fourth overflow valve is connected to the eighth pipeline, and the other end is connected to the ninth pipeline.

[0030] Furthermore, a sixth stop valve is installed on the sixth pipeline, the seventh pipeline, the eighth pipeline and the ninth pipeline.

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

[0032] 1) The invention provides a multi-channel control system for a hydraulic fast forging machine, which is provided with at least two sets of parallel energy supply devices, so that one set is used as a spare set for the pilot valve of the proportional servo valve, which reduces the shutdown frequency and maintenance time of the fast forging machine due to control system failure, greatly improves the use efficiency of the fast forging machine, and further improves the production capacity. The multiple energy supply devices can be actively switched regularly or temporarily for use as needed, which solves the problem that when any component of the hydraulic control system in the prior art fails, the control system cannot continue to work; in addition, at least two sets of parallel cooling devices are provided, so that one set is used as a spare set for cooling, and if one set fails, it can be immediately switched to another set for use. It will not affect the cooling of the oil in the control tank, solves the problem that the oil is often in a high temperature environment and causes the oil to deteriorate quickly, and regular switching prolongs the life of the cooling device; at the same time, at least two sets of energy supply devices and cooling devices include filters. Under this structure, the filter will always run and will not be suspended, thus solving the problem that the lack of the filtration system may cause metal chips to enter the main system and cause damage to the control valve or even the hydraulic cylinder and pump.

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

[0034] 3) The invention provides a multi-channel control system for a hydraulic fast forging machine, and an oil replenishing mechanism and an oil draining mechanism are also provided on the control oil tank. The oil replenishing mechanism is to prevent the control pump and the cooling oil pump from being damaged and scrapped due to insufficient oil in the control oil tank, or even the possibility of failure of the entire hydraulic system of the fast forging machine; the oil draining mechanism can drain the oil in the control oil tank to the main oil tank when the oil level in the control oil tank is higher than the set value, thereby avoiding oil overflow from the control oil tank, saving resources and being beneficial to environmental protection. The invention greatly improves the use efficiency of the equipment and reduces production costs.

[0035] 4) The present invention provides a multi-channel control system for a hydraulic fast forging machine. The energy supply device and the cooling device can realize rapid switching of the two systems and multiple combinations within the energy supply device, avoiding combination and switching when the functions are the same and there is no simultaneous failure in a single set of mechanisms. It can also increase the filtration area when there are many impurities in the oil, and realize rapid cooling of the oil in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 It is a structural schematic diagram of the multi-channel control system of the hydraulic fast forging machine of the present invention.

[0039] Among them: 1 is the energy storage mechanism;

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

[0041] 3 is the main fuel tank;

[0042] 4 is an energy supply device; 41 is a control pump; 42 is a first overflow valve; 43 is a first pressure sensor; 44 is a first pressure gauge; 45 is a first check valve; 46 is a second pressure gauge; 47 is a first control unit; 48 is a second control unit; 49 is a first stop 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 stop valve; 54 is a fourth stop 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 an oil replenishing mechanism; 61 is an oil replenishing pump; 62 is a third overflow valve;

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

[0046] 8 is the first filter. DETAILED DESCRIPTION

[0047] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention described in detail in the appended claims.

[0048] In response to the company's demand that certain materials cannot be returned to the furnace during hydraulic rapid forging, the present invention is designed to enable the hydraulic rapid forging machine to continue working until the material process is completed. The existing hydraulic rapid forging machine will stop working if an accident occurs during the process, which no longer meets the company's needs.

[0049] See also Figure 1 The embodiment of the present invention provides a multi-channel control system for a hydraulic fast forging machine, including an energy storage mechanism 1 and a control oil tank 2, the control oil tank 2 is respectively connected with two sets of parallel energy supply devices 4 and two sets of parallel cooling devices 5, each set of energy supply devices 4 is connected to the energy storage mechanism 1, each set of energy supply devices 4 is used to provide power to the main system of the hydraulic fast forging machine, and each set of cooling devices 5 is used to dissipate heat and cool the oil in the control oil tank 2; each set of energy supply devices 4 and cooling devices 5 are connected to a controller; specifically, the controller is a PLC controller;

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

[0051] Specifically, the energy storage mechanism 1 is also called an accumulator device, and its purpose in the system is to absorb and release system energy when the fast forging machine switches between actions and to balance the pressure fluctuation of the control system.

[0052] In this embodiment, the control system is configured to supply oil to the pilot valve of the main system proportional servo valve in parallel with two sets of energy supply devices 4 to control the opening, closing and opening amount of the main valve of the proportional servo valve. The two sets of energy supply devices 4 can be quickly switched. When one set of energy supply devices 4 fails or the pipeline connected to it is damaged and leaking and needs to be shut down, the energy supply device 4 can be stopped and switched to another set of energy supply devices 4 so that the entire hydraulic system can continue to operate without affecting the orderly production.

[0053] Furthermore, each energy 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 pipeline, and the other end of the control pump 41 is connected to the energy storage mechanism 1 through a second pipeline.

[0054] Furthermore, each energy supply device 4 includes a flexible connection connected to the control pump 41 to facilitate disassembly and vibration absorption.

[0055] Further, a first overflow valve 42, a first pressure sensor 43, a first pressure gauge 44, a first one-way valve 45, a first stop valve 49, a first filter 8, a second pressure gauge 46 and a first control unit 47 are sequentially arranged on the second pipeline from the control pump 41 to the energy storage mechanism 1, one end of a tenth pipeline is connected between the first one-way valve 45 and the first stop valve 49, and the other end of the tenth pipeline is connected between the first one-way valve 45 and the first stop valve 49 on the second pipeline of any other energy supply device 4, so that each energy supply device 4 is connected to two first filters 8 in parallel;

[0056] The tenth pipeline is provided with a second stop valve;

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

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

[0059] Specifically, the control pump 41 is a high-pressure pump; the first overflow valve 42 is an electromagnetic overflow valve, which is 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 energy supply devices 4 in the present 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 energy supply devices 4 can be realized, such as "1 set of control pump group + 2 sets of filter devices", "1 set of control pump group + filter device in another set of energy supply device". Through the combination, rapid switching and online maintenance of the various mechanisms of the two sets of energy supply devices 4 can be achieved.

[0061] Furthermore, the first pipeline is provided with a second control unit 48. The first control unit 47 and the second control unit 48 are the same, and both include a second one-way valve and a seventh stop valve.

[0062] In this embodiment, a second control unit 48 is provided at the oil inlet of each control pump 41 (here, the seventh stop valve of the second control unit 48 is mainly described), and the opening and closing of the seventh stop valve are monitored by the controller, and the control pump 41 can be started only when the seventh stop valve is fully opened. Since the main system only needs to start one control pump 41 to meet the requirements when in use, and the other control pump 41 is in a non-working state, the corresponding seventh stop valve is closed to prevent misoperation. When switching is required, it is only necessary to control the seventh stop valve corresponding to each control pump 41 to achieve switching. The switching must be carried out according to the usage situation. For example, if a control pump 41 fails, it needs to be switched to another control pump 41; it can also be actively switched regularly to extend the service life of a single control pump 41.

[0063] Furthermore, a liquid level controller 21 and a temperature sensor connected to the controller are installed on the control oil tank 2. The liquid level controller 21 is used to monitor the oil height in the control oil tank 2 and transmit the measured data to the controller.

[0064] Furthermore, each set of the cooling device 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, and the other end of the heat exchanger 51 is connected to the control oil tank 2 through 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 set of the cooling device 5 further includes a second overflow valve 52, one end of the second overflow valve 52 is connected to the third pipeline, and the other end of the second overflow valve 52 is connected to the fourth pipeline.

[0066] In addition, the third pipeline is connected to a third stop valve;

[0067] A second flow meter 57, a second pressure measuring interface 58 and a second filter 59 are sequentially arranged on the fifth pipeline in the direction from the heat exchanger 51 to the control oil tank 2;

[0068] A fourth stop valve 54, a fifth stop valve 53, a first flow meter 55, and a first pressure measuring interface 56 are sequentially arranged on the fourth pipeline in the direction from the cooling oil pump 50 to the heat exchanger 51, and one end of an eleventh pipeline is connected between the fourth stop valve 54 and the fifth stop valve 53, and the other end of the eleventh pipeline is connected between the fourth stop valve 54 and the fifth stop valve 53 on the fourth pipeline of any other set of cooling devices 5, so that each set of cooling devices 5 is connected in parallel with two heat exchangers 51 and two second filters 59;

[0069] The eleventh pipeline is provided with a fifth stop 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 sets of parallel cooling devices 5 of the present invention is "hydraulic pump group + heat exchange device". By changing the opening / closing of the corresponding pipeline valves, multiple working modes of the two sets of cooling devices 5 can be realized, such as "1 set of cooling oil pump group + 2 sets of heat exchange and filtering devices", "1 set of cooling oil pump group + heat exchange and filtering device in another set of cooling device". Through the combination, rapid switching and online maintenance of each mechanism of the two sets of cooling devices can be achieved.

[0072] In this embodiment, the control system is configured to cool the oil in the control oil tank 2 in parallel with two sets of cooling devices 5, adopting a "one in use and one in reserve" working mode. Specifically, each cooling oil pump 50 is independently provided with a heat exchanger 51, and the heat exchanger 51 is a plate heat exchanger. Each cooling device 5 can work independently and can be switched. It is also possible to put two cooling devices 5 into use at the same time when the ambient temperature is very high. The use 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 working setting value, the motor of the cooling oil pump 50 starts, driving the cooling oil pump 50 to operate and bring the oil in the control oil tank 2 into the plate heat exchanger to exchange heat with the cooling medium in the plate heat exchanger, and quickly cool 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 working setting value, the cooling oil pump 50 stops working. The next time the oil temperature in the control oil tank 2 is higher than the setting value again, the motor of the cooling oil pump 50 will automatically start and drive the cooling oil pump 50 to bring the high-temperature oil into the plate heat exchanger to exchange heat with the cooling medium. This process is automatically controlled by the temperature sensor and PLC. The above process can save energy and reduce consumption.

[0074] In this embodiment, the fifth stop valve 53 is a stop valve with a limit switch. In order to ensure that the cooling oil pump 50 does not suck empty, the fifth stop valve 53 is provided on the third pipeline (i.e., the oil suction port pipeline of the cooling oil pump 50). Only when the fifth stop valve 53 is fully opened and the limit switch gives an electrical signal to the controller, the cooling oil pump 50 can be started. At the same time, the fifth stop valve 53 is also used for equipment maintenance. For example, the fifth stop valve 53 is closed when the control oil tank 2 needs to be cleaned, the pipeline needs to be welded due to oil leakage, and the heat exchanger 51 is replaced and maintained, etc., to prevent the residual oil in the oil circuit of the cooling oil pump 50 from entering the control oil tank 2 and to prevent the oil in the control oil tank 2 from flowing out through the cooling oil pump 50 when the heat exchanger 51 is replaced.

[0075] In this embodiment, the second relief valve 52 is a low-pressure safety relief valve. Since the oil heat exchange does not require high pressure, it is only to introduce the oil from the control oil tank 2 into the plate heat exchanger. Therefore, a low-pressure safety relief valve is selected and arranged at the outlet of the cooling oil pump 50. The purpose of setting the low-pressure relief valve is to prevent the outlet pipeline of the cooling oil pump 50 from being blocked, so that part of the oil of the cooling oil pump 50 flows back to the control oil tank 2 through the second relief valve, so that the cooling oil pump 50 and the pipeline are depressurized without the situation of pressure holding, and the cooling oil pump 50, its components and accessories are protected from damage. The service life of the cooling oil pump 50 is extended. Another purpose of setting the low-pressure safety relief valve is to prevent the pressure of the entire cooling oil circuit from exceeding the allowable pressure of the plate heat exchanger, causing the plate heat exchanger to leak and fail.

[0076] Further, 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 pipeline, and the inlet is connected to the main oil tank 3 through a seventh pipeline, one end of the third overflow valve 62 is connected to the sixth pipeline, and the other end is connected to the seventh pipeline;

[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 through the eighth pipeline, and the other end is connected to the control oil tank 2 through the ninth pipeline, and one end of the fourth overflow valve 72 is connected to the eighth pipeline, and the other end is connected to the ninth pipeline. 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, the sixth pipeline, the seventh pipeline, the eighth pipeline and the ninth pipeline are all installed with a sixth stop valve.

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

[0080] In order to ensure that the oil replenishment pump 61 does not suck empty, a sixth stop valve is provided on the oil suction port pipeline of the oil replenishment pump 61. The sixth stop valve is a stop valve with a limit switch. Only when the sixth stop valve is opened and the limit switch gives a PLC electrical signal can the oil replenishment pump 61 be started. The sixth stop valve is also used for equipment maintenance, for example, the sixth stop valve is closed when the control oil tank 2 needs to be cleaned, the pipeline needs to be welded due to oil leakage, and fault handling is handled.

[0081] Specifically, the third relief valve 62 is a low-pressure safety relief valve, which is arranged at the outlet of the oil replenishment pump 61, because the oil replenishment does not require high pressure, and it is just to pour the oil from one tank into another tank. The purpose of setting the low-pressure relief valve is to prevent the outlet pipeline of the oil replenishment pump 61 from being blocked, etc., so that part of the oil in the oil replenishment pump 61 flows back to the main tank 3 through the third relief valve 62, so as to relieve the pressure of the pump body and pipeline without the situation of pressure holding, and protect the oil replenishment pump 61, its components and accessories from damage. Extend the service life of the oil replenishment pump 61.

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

[0083] In order to ensure that the oil discharge pump 71 does not suck empty, a stop valve with a limit switch is provided on the oil suction port pipeline of the oil discharge pump 71. The oil discharge pump 71 can only be started when the stop valve is opened and the limit switch gives a PLC electrical signal. The stop valve is also used for equipment maintenance. For example, the stop valve is closed when the control oil tank 2 needs to be cleaned, the pipeline needs to be welded for oil leakage, and when troubleshooting is required to prevent residual oil in the oil circuit of the oil discharge pump 71 from entering the control oil tank 2 and to prevent the main oil tank 3 from backflowing into the control oil tank 2 when the ball valve fails.

[0084] Specifically, a low-pressure safety relief valve is provided at the outlet of the oil drain pump 71, because oil draining does not require high pressure, and it is only to pour the oil from one tank into another. The purpose of providing the low-pressure relief valve is to prevent the outlet pipeline of the oil drain pump 71 from being blocked, the ball valve on the outlet pipeline of the main oil tank 3 and the oil drain pump 71 from being closed by mistake, etc., so that part or all of the oil in the oil drain pump 71 flows back to the control oil tank 2 through the low-pressure safety relief valve, so as to relieve the pressure of the pump body and pipeline without the situation of pressure holding, and protect the oil drain pump 71, its components and accessories from damage, and extend the service life of the oil drain pump 71.

[0085] In this embodiment, the volume of the control oil tank 2 is at least twice the volume of the control oil tank 2 of the existing hydraulic fast forging machine. The volume of the control oil tank 2 of the existing fast forging machine is 1.2m 3. Reduce the oil temperature rise rate and control the oil temperature under the condition of unchanged use conditions. In addition, the area of ​​the control system heat exchanger 51 is at least twice the area of ​​the existing hydraulic forging machine control system heat exchanger 51. The total heat exchange area of ​​the existing forging machine control system is 12㎡. Increasing the heat exchange area of ​​the heat exchanger 51 and improving its heat exchange efficiency will also reduce the oil temperature rise rate and control the oil temperature, thus ensuring that the oil will not change quality due to temperature and ensure good performance. Low oil temperature also protects the sealing of the control system hydraulic valve and the main system proportional servo valve.

[0086] In this embodiment, a control switching program is set on the controller PLC, which enables rapid switching of operations between the two energy supply devices 4, rapid switching of operations between the two cooling devices 5, and automatic start or shut down of the oil replenishment mechanism 6 and the oil discharge mechanism 7 to ensure that the liquid level of the control oil tank 2 is in the optimal working range.

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

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

[0089] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may 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 respectively connected to at least two sets of parallel energy supply devices (4) and at least two sets of parallel cooling devices (5), each set of the energy supply devices (4) is connected to the energy storage mechanism (1), each set of the energy supply devices (4) is used to provide control oil to the main system of the hydraulic fast forging machine, and each set of the cooling devices (5) is used to dissipate heat and cool the oil in the control oil tank (2); each set of the energy supply devices (4) and the cooling devices (5) are connected to a controller; It also includes an oil replenishing mechanism (6) and an oil discharging mechanism (7), one end of each of the oil replenishing mechanism (6) and the oil discharging mechanism (7) is connected to the control oil tank (2), and the other end of each of the oil replenishing mechanism (6) and the oil discharging mechanism (7) is connected to the main oil tank (3).

2. The multi-channel control system of the hydraulic fast forging machine according to claim 1 is characterized in that: Each set of the energy supply device (4) comprises a control pump (41) connected to the controller, one end of the control pump (41) is connected to the control oil tank (2) via a first pipeline, and the other end is connected to the energy storage mechanism (1) via a second pipeline.

3. The multi-channel control system of the hydraulic fast forging machine according to claim 2 is characterized in that: A first overflow valve (42), a first pressure sensor (43), a first pressure gauge (44), a first one-way valve (45), a first stop valve (49), a first filter (8), a second pressure gauge (46) and a first control unit (47) are sequentially arranged on the second pipeline in a direction from the control pump (41) to the energy storage mechanism (1); one end of a tenth pipeline is connected between the first one-way valve (45) and the first stop valve (49); the other end of the tenth pipeline is connected between the first one-way valve (45) and the first stop valve (49) on the second pipeline of any other energy supply device (4), so that each energy supply device (4) is connected in parallel with two first filters (8); The tenth pipeline is provided with a second stop valve; The first overflow valve (42) is also connected to the control oil tank (2); The first pressure sensor (43) and the first filter (8) are both connected to a controller.

4. The multi-channel control system of the hydraulic fast forging machine according to claim 2 is characterized in that: A second control unit (48) is arranged on the first pipeline.

5. The multi-channel control system of the hydraulic fast forging machine according to claim 1 is characterized in that: The control oil tank (2) is provided with a liquid level controller (21) and a temperature sensor connected to the controller. The liquid level controller (21) is used to monitor the oil height in the control oil tank (2) and transmit the measured data to the controller.

6. The multi-channel control system of the hydraulic fast forging machine according to claim 1 is characterized in that: Each set of the cooling device (5) comprises 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) 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, and the other end of the heat exchanger (51) is connected to the control oil tank (2) via a fifth pipe.

7. The multi-channel control system of the hydraulic rapid forging machine according to claim 6 is characterized in that: Each set of the cooling device (5) further comprises a second overflow valve (52), one end of the second overflow valve (52) being connected to the third pipeline, and the other end of the second overflow valve (52) being connected to the fourth pipeline.

8. The multi-channel control system of the hydraulic rapid forging machine according to claim 6 is characterized in that: The third pipeline is connected with a third stop valve; A second flow meter (57), a second pressure measuring interface (58) and a second filter (59) are sequentially arranged on the fifth pipeline in a direction from the heat exchanger (51) to the control oil tank (2); A fourth stop valve (54), a fifth stop valve (53), a first flow meter (55), and a first pressure measuring interface (56) are sequentially arranged on the fourth pipeline in a direction from the cooling oil pump (50) to the heat exchanger (51), and one end of an eleventh pipeline is connected between the fourth stop valve (54) and the fifth stop valve (53), and the other end of the eleventh pipeline is connected between the fourth stop valve (54) and the fifth stop valve (53) on the fourth pipeline of any other set of cooling devices (5), so that each set of cooling devices (5) is connected in parallel with two heat exchangers (51) and two second filters (59); The eleventh pipeline is provided with a fifth stop valve; The first flow meter (55), the second flow meter (57) and the second filter (59) are all connected to the controller.

9. The multi-channel control system of the hydraulic fast forging machine according to claim 1 is characterized in that: The oil replenishment mechanism (6) comprises 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) via a sixth pipeline, and the other end is connected to the main oil tank (3) via a seventh pipeline, one end of the third overflow valve (62) is connected to the sixth pipeline, and the other end is connected to the seventh pipeline; The oil discharge mechanism (7) comprises 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 pipeline, and the other end is connected to the control oil tank (2) via a ninth pipeline, and one end of the fourth overflow valve (72) is connected to the eighth pipeline, and the other end is connected to the ninth pipeline.

10. The multi-channel control system of the hydraulic rapid forging machine according to claim 9, characterized in that: The sixth pipeline, the seventh pipeline, the eighth pipeline and the ninth pipeline are all installed with a sixth stop valve.

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