Pressurizing system for hydraulic oil rod and rapid braking method of pressurizing system

Abstract

The invention relates to the technical field of hydraulic pressure, and discloses a pressurization system for a hydraulic oil rod and a rapid braking method thereof.The pressurization system comprises multiple sets of driving systems, and each driving system comprises a hydraulic oil tank, a multi-pump system, a rapid braking module, an overflow module and a cooling module; the hydraulic oil tank is connected with the hydraulic oil cylinder through an oil supply pipeline, and the hydraulic oil cylinder is connected back to the hydraulic oil tank through an oil return pipeline. When the hydraulic oil cylinder needs to be rapidly driven, hydraulic oil in a rod cavity of the hydraulic oil cylinder can be controlled to flow back to the rapid braking module through the oil return pipeline and then flow into a rodless cavity of the hydraulic oil cylinder from the rapid braking module, and rapid stretching of a piston rod of the hydraulic oil cylinder is achieved. When the telescopic pressure of the hydraulic oil cylinder needs to be adjusted, hydraulic oil of the oil supply pipeline can flow back to the hydraulic oil tank through the overflow module, the overflow module is adjusted, and therefore the hydraulic oil overflowing back to the hydraulic oil tank is controlled, and pressure adjustment of the oil supply pipeline is achieved.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic technology, and in particular to a pressure boosting system for a hydraulic oil rod and a rapid braking method thereof. Background Art

[0002] In the hydraulic system, the hydraulic cylinder is one of the indispensable hydraulic components. The hydraulic cylinder is widely used in today's machinery and is used in many special cases. The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides. The hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device.

[0003] Traditional working hydraulic cylinders generally use valve-controlled cylinder technology. To achieve loading and pressure maintenance of large and ultra-large loads, they must be equipped with multiple sets of high-pressure, high-flow hydraulic pumps and multiple sets of high-power motors. The hydraulic system is large and complex, and some working conditions also require a cooling system. The manufacturing cost is very expensive, the energy consumption is serious, and it causes a huge waste of resources.

[0004] In view of the structural characteristics of the hydraulic cylinder, the industry has conducted relevant research and design, such as a pneumatic booster system for a hydraulic oil tank of construction machinery, including an air compressor, a reversing valve, a dryer, a regeneration air storage tank, an air storage tank, a pressure reducing valve, a hydraulic oil tank and a relief valve; the air compressor is connected to the prime mover and driven by the prime mover; the reversing valve is connected between the air compressor outlet and the dryer inlet; the regeneration air storage tank and the air storage tank are respectively connected to the dryer outlet; the pressure reducing valve is connected between the air storage tank and the hydraulic oil tank; the relief valve is installed on the hydraulic oil tank, and compressed air is input into the hydraulic oil tank to increase the pressure at the suction port of the hydraulic pump to avoid air suction.

[0005] However, due to the high compressibility of gas, when compressed air is used to increase the pressure, the gas pressure may fluctuate with the change in volume, resulting in unstable pressure and affecting the normal oil suction of the hydraulic pump; and inputting compressed air into the hydraulic oil tank may cause air to mix with the hydraulic oil, forming bubbles. If these bubbles are sucked into the hydraulic pump, they will cause "cavitation", resulting in reduced pump efficiency, increased noise, and even damage to the pump body. Summary of the invention

[0006] In order to solve the above-mentioned prior art problems, the present invention provides a boosting system for a hydraulic oil rod;

[0007] Another object of the present invention is to provide a rapid braking method for a booster system of a hydraulic oil boom.

[0008] A booster system for a hydraulic oil rod, comprising a plurality of drive systems, wherein the drive systems include: a hydraulic oil tank, a multi-pump system, a quick brake module, an overflow module and a cooling module; the hydraulic oil tank is connected to a hydraulic oil cylinder through an oil supply pipeline, and the hydraulic oil cylinder is also connected back to the hydraulic oil tank through an oil return pipeline;

[0009] The oil supply pipeline is connected to a multi-pump system for flowing the hydraulic oil in the hydraulic oil tank into the oil supply pipeline. The rapid brake module is arranged on the oil supply pipeline connecting the hydraulic oil tank and the hydraulic cylinder for increasing the pressure of the hydraulic oil.

[0010] The oil return pipeline is provided with a cooling module for cooling the hydraulic oil flowing back from the hydraulic cylinder;

[0011] The rapid braking module comprises an oil supply braking module and an oil return module, wherein the oil supply braking module is respectively arranged on the oil supply pipeline and the oil return pipeline, and the oil return module is arranged on the oil return pipeline;

[0012] The multi-pump system is also connected to the oil return pipeline through an overflow pipeline, and an overflow module is provided on the overflow pipeline.

[0013] Preferably, each set of driving systems controls a set of hydraulic cylinders.

[0014] Preferably, an oil suction filter is provided between the oil supply pipeline and the hydraulic oil tank, and an oil return filter is provided between the oil return pipeline and the hydraulic oil tank.

[0015] Preferably, a liquid level sensor is further provided in the hydraulic oil tank, an oil drain nozzle is further provided at the bottom of the hydraulic oil tank, and the hydraulic oil tank is also connected to the outside world through an air filter.

[0016] Preferably, a one-way valve is further provided between the pump linkage system and the rapid braking module.

[0017] Furthermore, the multi-pump system includes a large hydraulic pump, a small hydraulic pump and a drive motor, and the drive motor is connected to the large hydraulic pump and the small hydraulic pump respectively;

[0018] The oil supply pipeline includes a first oil supply pipeline and a second oil supply pipeline, the first oil supply pipeline and the second oil supply pipeline respectively connect the hydraulic oil tank with the rapid braking module, a large hydraulic pump is arranged on the first oil supply pipeline, and a small hydraulic pump is arranged on the second oil supply pipeline.

[0019] Furthermore, the overflow pipe includes a first overflow pipe and a second overflow pipe. The large hydraulic pump is also connected to the hydraulic oil tank through the first overflow pipe, and the small hydraulic pump is also connected to the hydraulic oil tank through the second overflow pipe. Overflow modules are provided on the first overflow pipe and the second overflow pipe.

[0020] Furthermore, the oil supply brake module includes a first electromagnetic reversing valve, a first hydraulically controlled one-way valve and a first one-way throttle valve.

[0021] The first electro-hydraulic reversing valve is arranged on the oil supply pipeline and the oil return pipeline.

[0022] The first hydraulically controlled one-way valve and the first one-way throttle valve are arranged on the oil supply pipe.

[0023] Furthermore, the first port of the first electro-hydraulic reversing valve is connected to the rodless chamber of the hydraulic cylinder through the first hydraulically controlled one-way valve and the first one-way throttle valve.

[0024] The second port of the first electro-hydraulic reversing valve is connected to the rod chamber of the hydraulic cylinder through the oil return pipeline;

[0025] The third port of the first electro-hydraulic reversing valve is connected to the hydraulic oil tank through a multi-pump system;

[0026] The fourth port of the first electro-hydraulic reversing valve is connected to the hydraulic oil tank through the cooling module.

[0027] Furthermore, the oil return module includes a second electromagnetic reversing valve, a second hydraulically controlled one-way valve and a second one-way throttle valve.

[0028] The second electromagnetic reversing valve is also connected to the oil supply pipeline and the oil return pipeline.

[0029] The second hydraulically controlled one-way valve and the second one-way throttle valve are also connected to the oil supply pipeline.

[0030] Furthermore, the first port of the second electromagnetic reversing valve is connected to the rodless chamber of the hydraulic cylinder through the second hydraulically controlled one-way valve and the second one-way throttle valve.

[0031] The second port of the second electromagnetic reversing valve is also provided with a second one-way throttle valve and communicates with the rod chamber of the hydraulic oil cylinder, and the feedback signal of the second one-way throttle valve of the second port of the second electromagnetic reversing valve is connected to the feedback signal of the second one-way throttle valve of the first port of the second electromagnetic reversing valve;

[0032] The third port of the second electromagnetic reversing valve is connected to the hydraulic oil tank through the multi-pump system;

[0033] The fourth port of the second electromagnetic reversing valve is connected to the hydraulic oil tank through the cooling module.

[0034] Furthermore, the overflow module is an electromagnetic overflow valve, and the low-pressure outlet and the high-pressure outlet of the electromagnetic overflow valve are respectively connected to the oil return pipeline.

[0035] Furthermore, the cooling module is a water cooler, and the water flowing through the cooling module performs convection heat exchange with the oil return pipeline to cool the hydraulic oil.

[0036] A rapid braking method for a supercharging system, the rapid braking method for a supercharging system comprising the following steps:

[0037] S1: Start a part of the pumps in the multi-pump system to increase the air pressure in the oil supply pipeline, and let the hydraulic oil in the hydraulic oil tank flow into the oil supply pipeline;

[0038] S2: The hydraulic oil in the oil supply pipeline also flows back to the hydraulic oil tank through the overflow module, so that the oil supply pipeline is adjusted to an oil supply flow rate of 95L / min;

[0039] S3: energize the coil at one end of the electromagnetic reversing valve of the oil supply brake module to make the hydraulic oil in the oil supply pipeline flow into the rodless chamber of the hydraulic cylinder, and then energize the coil at one end of the electromagnetic reversing valve of the oil return module to make the rod chamber of the hydraulic cylinder flow back to the hydraulic oil tank through the oil return pipeline, so that the piston rod of the hydraulic cylinder extends;

[0040] S4: When the piston rod of the hydraulic cylinder is extended to the top, the coil at the other end of the electromagnetic reversing valve of the oil supply brake module is energized to make the hydraulic oil in the oil supply pipeline flow into the rod chamber of the hydraulic cylinder; then the coil at the other end of the electromagnetic reversing valve of the oil return module is energized to make the rodless chamber of the hydraulic cylinder flow back to the hydraulic oil tank through the oil return pipeline, so that the piston rod of the hydraulic cylinder is retracted;

[0041] S5: When the hydraulic cylinder needs to be driven quickly, the passage of the electromagnetic reversing valve of the oil return module is not opened when the piston rod is extended, so that the hydraulic oil in the rod chamber of the hydraulic cylinder flows into the electromagnetic reversing valve of the brake module through the oil return pipeline, and flows into the oil supply pipeline through the electromagnetic reversing valve, realizing a differential circuit, so that the piston rod of the hydraulic cylinder is quickly extended;

[0042] S6: When the extension and contraction pressure of the hydraulic cylinder needs to be adjusted, it can be achieved by controlling the hydraulic oil flowing back to the hydraulic oil tank through the overflow module; or another part of the multi-pump system can be started to adjust the oil supply pipeline to an oil supply flow rate of 119L / min to achieve pressurization.

[0043] Preferably, the hydraulic oil in the oil supply pipeline also flows back to the hydraulic oil tank through the overflow module, and the overflow module is adjusted to control the hydraulic oil overflowing back to the hydraulic oil tank, thereby achieving pressure regulation of the oil supply pipeline.

[0044] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0045] ① Connecting the multi-pump system to the hydraulic cylinder can provide the most suitable hydraulic power for the hydraulic cylinder;

[0046] The multi-pump system includes a large hydraulic pump, a small hydraulic pump and a drive motor. When the hydraulic system does not need to work at full load, the small hydraulic pump can be linked only by the drive motor, and the small hydraulic pump can provide appropriate flow and pressure. When the hydraulic system needs to provide high pressure, the large hydraulic pump can be linked by the drive motor to achieve the output of the double pump system, thereby increasing the pressure of the hydraulic oil. It is an effective means to improve the performance, efficiency and flexibility of the hydraulic system.

[0047] ② An overflow module is installed between the multi-pump system and the hydraulic cylinder to ensure the smooth movement of the hydraulic cylinder and improve the working efficiency and accuracy of the equipment;

[0048] An overflow pipeline is provided between the large hydraulic pump, the small hydraulic pump and the hydraulic oil tank, and the overflow module is respectively arranged between the two overflow pipelines. When the hydraulic system does not need to work at full load, the excess hydraulic oil can be returned to the hydraulic oil tank by controlling the overflow valve module, rather than circulating unnecessarily under high pressure, thereby reducing heat loss and power consumption and improving the overall energy efficiency of the system; when the system pressure reaches the preset value, the overflow valve opens and the excess oil is directed back to the tank, thereby limiting the system pressure from continuing to rise, thereby achieving effective control of the working pressure of the hydraulic cylinder.

[0049] ③ A slider channel with two connectable outlets is provided at one end of the electromagnetic reversing valve. When the hydraulic cylinder needs to be driven quickly, the passage of the electromagnetic reversing valve of the oil return module is not opened when the piston rod is extended, so that the hydraulic oil in the rod chamber of the hydraulic cylinder flows into the electromagnetic reversing valve of the brake module through the oil return pipe, and flows into the oil supply pipe through the electromagnetic reversing valve, thereby realizing a differential circuit and extending the piston rod of the hydraulic cylinder quickly. By guiding the oil in the rod chamber to flow in the same direction as the rodless chamber, all the hydraulic energy entering the cylinder is fully utilized, thereby achieving higher efficiency and faster action speed.

[0050] ④ Since the hydraulic system will generate a lot of heat during operation, especially the temperature of the hydraulic oil will rise after the high-pressure operation cycle inside the cylinder. High temperature will not only affect the physical properties of the hydraulic oil (such as reduced viscosity and poor lubricity), a cooling module is provided on the return oil pipeline of the hydraulic cylinder to cool the hydraulic oil flowing back from the hydraulic cylinder, so as to create a safer and healthier working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 is a schematic diagram of the drive system;

[0053] Figure 2 It is a schematic diagram of the hydraulic oil flow when the hydraulic cylinder is extended quickly;

[0054] Figure 3 It is a schematic diagram of the hydraulic oil flow during the pressurization process of the booster system;

[0055] Figure 4 is an enlarged schematic diagram of A;

[0056] Figure 5 is a schematic diagram of a rapid brake module;

[0057] Figure 6 It is a schematic diagram of the connection between the overflow module and the overflow pipe;

[0058] Figure 7 It is an overall schematic diagram of a buffer cylinder with high buffer performance;

[0059] Figure 8 It is a structural schematic diagram of a booster system for a hydraulic oil rod.

[0060] The reference numerals are as follows:

[0061] 1. Hydraulic oil tank;

[0062] 2. Multiple pump system; 201. Large hydraulic pump; 202. Small hydraulic pump; 203. Drive motor;

[0063] 3. Rapid brake module; 301. Oil supply brake module; 3011. First electro-hydraulic reversing valve; 3012. First hydraulically controlled one-way valve; 3013. First one-way throttle valve; 302. Oil return module; 3021. Second electromagnetic reversing valve; 3022. Second hydraulically controlled one-way valve; 3023. Second one-way throttle valve;

[0064] 4. Overflow module;

[0065] 5. Cooling module;

[0066] 6. Oil supply pipeline; 601. First oil supply pipeline; 602. Second oil supply pipeline;

[0067] 7. Oil return pipeline;

[0068] 8. Overflow pipe; 801. First overflow pipe; 802. Second overflow pipe. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0070] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0071] Example 1

[0072] like Figure 1-8 As shown, this embodiment discloses a booster system for a hydraulic oil rod, including multiple drive systems, characterized in that the drive system includes: a hydraulic oil tank 1, a multi-pump system 2, a fast brake module 3, an overflow module 4 and a cooling module 5; the hydraulic oil tank 1 is connected to the hydraulic oil cylinder through an oil supply pipeline 6, and the hydraulic oil cylinder is also connected back to the hydraulic oil tank 1 through an oil return pipeline 7;

[0073] The oil supply pipeline 6 is connected to the multi-pump system 2, which is used to flow the hydraulic oil in the hydraulic oil tank 1 into the oil supply pipeline 6. The fast brake module 3 is arranged on the oil supply pipeline 6 connecting the hydraulic oil tank 1 and the hydraulic cylinder, which is used to increase the pressure of the hydraulic oil;

[0074] A cooling module 5 is provided on the oil return pipeline 7 for cooling the hydraulic oil returning from the hydraulic cylinder;

[0075] The rapid braking module 3 comprises an oil supply braking module 301 and an oil return module 302. The oil supply braking module 301 is respectively arranged on the oil supply pipeline 6 and the oil return pipeline 7, and the oil return module 302 is arranged on the oil return pipeline 7.

[0076] The multiple pump system 2 is also connected to the oil return pipe 7 through an overflow pipe 8 , and an overflow module 4 is provided on the overflow pipe 8 .

[0077] When working, the multi-pump system 2 is driven, and the high pressure causes the hydraulic oil in the hydraulic oil tank 1 to flow into the oil supply pipe 6. The hydraulic oil in the oil supply pipe 6 enters the rodless chamber of the hydraulic oil cylinder through the quick brake module 3, pushing the piston rod to move toward the end of the rod chamber of the hydraulic oil cylinder. The hydraulic oil in the rod chamber of the hydraulic oil cylinder flows back to the hydraulic oil tank 1 through the return oil pipe 7.

[0078] When the hydraulic cylinder needs to be driven quickly, the hydraulic oil in the rod chamber of the hydraulic cylinder can be controlled to flow back to the fast braking module 3 through the oil return pipe 7, and then flow from the fast braking module 3 into the rodless chamber of the hydraulic cylinder, so that the piston rod of the hydraulic cylinder can be quickly extended;

[0079] When it is necessary to adjust the expansion and contraction pressure of the hydraulic cylinder, the hydraulic oil in the oil supply pipeline 6 can flow back to the hydraulic oil tank 1 through the overflow module, and the overflow module 4 can be adjusted to control the hydraulic oil overflowing back to the hydraulic oil tank 1 to achieve pressure regulation of the oil supply pipeline 6.

[0080] As a specific implementation, the multiple pump system 2 includes a large hydraulic pump 201, a small hydraulic pump 202 and a drive motor 203, and the drive motor 203 is connected to the large hydraulic pump 201 and the small hydraulic pump 202 respectively;

[0081] The oil supply pipeline 6 includes a first oil supply pipeline 601 and a second oil supply pipeline 602. The first oil supply pipeline 601 and the second oil supply pipeline 602 respectively connect the hydraulic oil tank 1 with the rapid brake module 3. A large hydraulic pump 201 is provided on the first oil supply pipeline 601, and a small hydraulic pump 202 is provided on the second oil supply pipeline 602.

[0082] The overflow pipe 8 includes a first overflow pipe 801 and a second overflow pipe 802 . The large hydraulic pump 201 is also connected to the hydraulic oil tank 1 through the first overflow pipe 801 , and the small hydraulic pump 202 is also connected to the hydraulic oil tank 1 through the second overflow pipe 802 . The first overflow pipe 801 and the second overflow pipe 802 are both provided with an overflow module 4 .

[0083] Specifically, the multi-pump system 2 includes a large hydraulic pump 201, a small hydraulic pump 202 and a drive motor 203. When the hydraulic system does not need to work at full load, the small hydraulic pump 202 can be linked only by the drive motor 203, and the small hydraulic pump 202 can provide appropriate flow and pressure; when the hydraulic system needs to provide high pressure, the large hydraulic pump 201 can be linked by the drive motor 203 to achieve the output of the dual pump system, thereby increasing the pressure of the hydraulic oil. This is an effective means to improve the performance, efficiency and flexibility of the hydraulic system.

[0084] Specifically, the overflow valve module 4 includes an overflow valve, and an overflow pipeline is provided between the large hydraulic pump 201, the small hydraulic pump 202 and the hydraulic oil tank 1. The overflow module 4 is respectively arranged between the two overflow pipelines. When the hydraulic system does not need to work at full load, the overflow valve module 4 can be controlled to make the excess hydraulic oil return to the hydraulic oil tank 1 instead of circulating unnecessarily under high pressure, thereby reducing heat energy loss and power consumption and improving the overall energy efficiency of the system; the overflow module 4, as a safety valve, can also prevent the pressure from increasing suddenly due to misoperation or other abnormal conditions, exceeding the bearing limit of the oil cylinder, thereby protecting the entire hydraulic system from damage;

[0085] As a pressure regulating device, the overflow module 4 can also set a maximum working pressure in the hydraulic circuit. When the system pressure reaches the preset value, the overflow valve opens and the excess oil is directed back to the hydraulic oil tank 1, thereby limiting the system pressure from continuing to rise and achieving effective control of the working pressure of the hydraulic cylinder.

[0086] As a specific implementation, the oil supply brake module 301 includes a first electromagnetic reversing valve 3011, a first hydraulically controlled one-way valve 3012 and a first one-way throttle valve 3013.

[0087] The first electro-hydraulic reversing valve 3011 is arranged on the oil supply pipeline 6 and the oil return pipeline 7.

[0088] The first hydraulically controlled one-way valve 3012 and the first one-way throttle valve 3013 are arranged on the oil supply pipeline 6;

[0089] The first port of the first electro-hydraulic reversing valve 3011 is connected to the rodless chamber of the hydraulic cylinder through the first hydraulically controlled one-way valve 3012 and the first one-way throttle valve 3013.

[0090] The second port of the first electro-hydraulic reversing valve 3011 is connected to the rod chamber of the hydraulic cylinder through the oil return pipe 7;

[0091] The third port of the first electro-hydraulic reversing valve 3011 is connected to the hydraulic oil tank 1 through the multi-pump system 2;

[0092] The fourth port of the first electro-hydraulic reversing valve 3011 is connected to the hydraulic oil tank 1 through the cooling module 5 .

[0093] Specifically, the first electromagnetic reversing valve 3011 includes a first port (A), a second port (B), a third port (P) and a fourth port (T), which are connected to the rodless chamber and the rod chamber of the hydraulic cylinder, and the hydraulic oil tank 1 connected to the multi-pump system 2 and the cooling module 5 respectively;

[0094] When the hydraulic cylinder needs to be driven quickly, the coil at one end of the first solenoid reversing valve 3011 is energized to connect the first port (A), the second port (B) and the third port (P), so that the hydraulic oil in the rod chamber of the hydraulic cylinder flows into the second port (B) of the first solenoid reversing valve 3011 through the return oil pipe 7, and flows back to the rodless chamber of the hydraulic cylinder from the first port (A) through the oil supply pipe 6, thereby realizing a differential circuit and extending the piston rod of the hydraulic cylinder quickly. By guiding the oil in the rod chamber to flow in the same direction as the rodless chamber, all the hydraulic energy entering the cylinder is fully utilized, thereby achieving higher efficiency and faster movement speed.

[0095] As a specific implementation, the oil return module 302 includes a second electromagnetic reversing valve 3021, a second hydraulically controlled one-way valve 3022, and a second one-way throttle valve 3023.

[0096] The second electromagnetic reversing valve 3021 is also connected to the oil supply pipeline 6 and the oil return pipeline 7.

[0097] The second hydraulically controlled one-way valve 3022 and the second one-way throttle valve 3023 are also connected to the oil supply pipeline 6;

[0098] The first port of the second electromagnetic reversing valve 3021 is connected to the rodless chamber of the hydraulic cylinder through the second hydraulically controlled one-way valve 3022 and the second one-way throttle valve 3023.

[0099] The second port of the second electromagnetic reversing valve 3021 is also provided with a second one-way throttle valve 3023 and communicates with the rod chamber of the hydraulic oil cylinder. The feedback signal of the second one-way throttle valve 3023 of the second port of the second electromagnetic reversing valve 3021 is connected to the feedback signal of the second one-way throttle valve 3023 of the first port of the second electromagnetic reversing valve 3021.

[0100] The third port of the second electromagnetic reversing valve 3021 is connected to the hydraulic oil tank 1 through the multi-pump system 2;

[0101] The fourth port of the second electromagnetic reversing valve 3021 is connected to the hydraulic oil tank 1 through the cooling module 5 .

[0102] Specifically, the second electromagnetic reversing valve 3021 also includes a first port (A), a second port (B), a third port (P) and a fourth port (T), which are connected to the rodless chamber and the rod chamber of the hydraulic cylinder, and the hydraulic oil tank 1 connected to the multi-pump system 2 and the cooling module 5 respectively;

[0103] Since the second solenoid reversing valve 3021 is driven by electromagnetic force only, the hydraulic oil flow through the second solenoid reversing valve 3021 is relatively small. When the hydraulic cylinder drive needs to be pressurized, the large hydraulic pump 201 of the multi-pump system 2 is started, and the coil at one end of the second solenoid reversing valve 3021 is energized, so that the first port (A) of the second solenoid reversing valve 3021 is connected to the third port (P), and the second port (B) of the second solenoid reversing valve 3021 is connected to the fourth port (T), so that the hydraulic oil enters the rodless chamber of the hydraulic cylinder from the second solenoid reversing valve 3021, so that the oil supply pipeline 6 is adjusted to an oil supply flow rate of 119L / min, thereby realizing the pressurization action.

[0104] Example 2

[0105] like Figure 1-8 As shown, this embodiment discloses a booster system for a hydraulic oil rod, including multiple drive systems, characterized in that the drive system includes: a hydraulic oil tank 1, a multi-pump system 2, a fast brake module 3, an overflow module 4 and a cooling module 5; the hydraulic oil tank 1 is connected to the hydraulic oil cylinder through an oil supply pipeline 6, and the hydraulic oil cylinder is also connected back to the hydraulic oil tank 1 through an oil return pipeline 7;

[0106] The oil supply pipeline 6 is connected to the multi-pump system 2, which is used to flow the hydraulic oil in the hydraulic oil tank 1 into the oil supply pipeline 6. The fast brake module 3 is arranged on the oil supply pipeline 6 connecting the hydraulic oil tank 1 and the hydraulic cylinder, which is used to increase the pressure of the hydraulic oil;

[0107] A cooling module 5 is provided on the oil return pipeline 7 for cooling the hydraulic oil flowing back from the hydraulic cylinder;

[0108] The rapid braking module 3 comprises an oil supply braking module 301 and an oil return module 302. The oil supply braking module 301 is respectively arranged on the oil supply pipeline 6 and the oil return pipeline 7, and the oil return module 302 is arranged on the oil return pipeline 7.

[0109] The multiple pump system 2 is also connected to the oil return pipe 7 through an overflow pipe 8 , and an overflow module 4 is provided on the overflow pipe 8 .

[0110] As a specific implementation, the overflow module 4 is an electromagnetic overflow valve, and the low-pressure outlet and the high-pressure outlet of the electromagnetic overflow valve are respectively connected to the oil return pipeline 7.

[0111] Specifically, the overflow module 4 includes an electromagnetic overflow valve, and a preset value is set in the electromagnetic overflow valve;

[0112] When the hydraulic system pressure reaches the preset value, the electromagnetic overflow valve opens, and the high-pressure oil is discharged to the low-pressure side through the high-pressure outlet, and then enters the return oil pipeline 7 through the low-pressure outlet, and returns to the hydraulic oil tank 1 through the bypass of the high-pressure oil, which can quickly release excess hydraulic energy and avoid excessive pressure accumulation, so as to ensure that the system is not overloaded and protect the safety of the hydraulic system.

[0113] As a specific implementation, the cooling module 5 is a water cooler, and the water flowing through the cooling module 5 performs convection heat exchange with the oil return pipe 7 to cool the hydraulic oil.

[0114] High temperature will reduce the viscosity of hydraulic oil, affecting the lubrication effect, causing increased wear and even damage to seals and increased leakage;

[0115] Specifically, a cooling module 5 is provided on the oil return pipe 7 of the hydraulic cylinder 1, which is used to cool the hydraulic oil flowing back from the hydraulic cylinder, so as to create a safer and healthier working environment; it can also prevent the hydraulic oil from being aged and oxidized due to excessive temperature, produce sediment, and clog filters and small channels, thereby extending the service life of hydraulic components and oil.

[0116] Example 3

[0117] like Figure 1-8 As shown, this embodiment discloses a rapid braking method for a supercharging system, and the rapid braking method for a supercharging system includes the following steps:

[0118] S1: starting a part of the pumps of the multi-pump system 2 to increase the air pressure in the oil supply pipeline 6, and allowing the hydraulic oil in the hydraulic oil tank 1 to flow into the oil supply pipeline 6;

[0119] S2: The hydraulic oil in the oil supply pipeline 6 also flows back to the hydraulic oil tank 1 through the overflow module 4, so that the oil supply pipeline 6 is adjusted to an oil supply flow rate of 95L / min;

[0120] S3: energize the coil at one end of the electromagnetic reversing valve of the oil supply brake module 301 to make the hydraulic oil in the oil supply pipe 6 flow into the rodless chamber of the hydraulic cylinder, and then energize the coil at one end of the electromagnetic reversing valve of the oil return module 302 to make the rod chamber of the hydraulic cylinder flow back to the hydraulic oil tank 1 through the oil return pipe 7, so that the piston rod of the hydraulic cylinder extends;

[0121] S4: When the piston rod of the hydraulic cylinder is extended to the top, the coil at the other end of the electromagnetic reversing valve of the oil supply brake module 301 is energized to make the hydraulic oil in the oil supply pipeline 6 flow into the rod chamber of the hydraulic cylinder; then the coil at the other end of the electromagnetic reversing valve of the oil return module 302 is energized to make the rodless chamber of the hydraulic cylinder flow back to the hydraulic oil tank 1 through the oil return pipeline 7, so that the piston rod of the hydraulic cylinder is retracted;

[0122] S5: When the hydraulic cylinder needs to be driven quickly, the passage of the electromagnetic reversing valve of the oil return module 302 is not opened when the piston rod is extended, so that the hydraulic oil in the rod chamber of the hydraulic cylinder flows into the electromagnetic reversing valve of the brake module 301 through the oil return pipe 7, and flows into the oil supply pipe 6 through the electromagnetic reversing valve, realizing a differential circuit, so that the piston rod of the hydraulic cylinder is extended quickly;

[0123] S6: When it is necessary to adjust the extension and contraction pressure of the hydraulic cylinder, this can be achieved by controlling the hydraulic oil flowing back to the hydraulic oil tank 1 through the overflow module 4; or another part of the pumps in the multi-pump system 2 can be started to adjust the oil supply pipeline 6 to an oil supply flow rate of 119L / min, thereby achieving a pressurization action.

[0124] Specifically, the hydraulic oil in the rod chamber of the hydraulic oil cylinder can be controlled to flow back to the rapid braking module 3 through the oil return pipe 7, and then flow from the rapid braking module 3 into the rodless chamber of the hydraulic oil cylinder, so that the piston rod of the hydraulic oil cylinder can be quickly extended;

[0125] The hydraulic oil in the oil supply pipeline 6 can flow back to the hydraulic oil tank 1 through the overflow module, and the overflow module 4 is adjusted to control the hydraulic oil overflowing back to the hydraulic oil tank 1, thereby achieving pressure regulation of the oil supply pipeline 6.

[0126] How it works

[0127] When working, the multi-pump system 2 is driven, and the high pressure causes the hydraulic oil in the hydraulic oil tank 1 to flow into the oil supply pipe 6. The hydraulic oil in the oil supply pipe 6 enters the rodless chamber of the hydraulic oil cylinder through the quick brake module 3, pushing the piston rod to move toward the end of the rod chamber of the hydraulic oil cylinder. The hydraulic oil in the rod chamber of the hydraulic oil cylinder flows back to the hydraulic oil tank 1 through the return oil pipe 7.

[0128] When the hydraulic cylinder needs to be driven quickly, the hydraulic oil in the rod chamber of the hydraulic cylinder can be controlled to flow back to the fast braking module 3 through the oil return pipe 7, and then flow from the fast braking module 3 into the rodless chamber of the hydraulic cylinder, so that the piston rod of the hydraulic cylinder can be quickly extended;

[0129] When it is necessary to adjust the expansion and contraction pressure of the hydraulic cylinder, the hydraulic oil in the oil supply pipeline 6 can flow back to the hydraulic oil tank 1 through the overflow module, and the overflow module 4 can be adjusted to control the hydraulic oil overflowing back to the hydraulic oil tank 1 to achieve pressure regulation of the oil supply pipeline 6.

[0130] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A booster system for a hydraulic oil rod, comprising a plurality of drive systems, characterized in that: The drive system comprises: a hydraulic oil tank (1), a multi-pump system (2), a rapid braking module (3), an overflow module (4) and a cooling module (5); the hydraulic oil tank (1) is connected to the hydraulic oil cylinder via an oil supply pipeline (6), and the hydraulic oil cylinder is also connected back to the hydraulic oil tank (1) via an oil return pipeline (7); The oil supply pipeline (6) is connected to a multi-pump system (2) for flowing the hydraulic oil in the hydraulic oil tank (1) into the oil supply pipeline (6); the rapid brake module (3) is arranged on the oil supply pipeline (6) connecting the hydraulic oil tank (1) and the hydraulic cylinder, for increasing the pressure of the hydraulic oil; The oil return pipeline (7) is provided with a cooling module (5) for cooling the hydraulic oil returning from the hydraulic cylinder; The rapid braking module (3) comprises an oil supply braking module (301) and an oil return module (302), wherein the oil supply braking module (301) is respectively arranged on the oil supply pipeline (6) and the oil return pipeline (7), and the oil return module (302) is arranged on the oil return pipeline (7); The multiple pump system (2) is also connected to the oil return pipeline (7) via an overflow pipeline (8), and an overflow module (4) is provided on the overflow pipeline (8).

2. The booster system for a hydraulic oil rod according to claim 1, characterized in that: The multiple pump system (2) comprises a large hydraulic pump (201), a small hydraulic pump (202) and a drive motor (203), wherein the drive motor (203) is connected to the large hydraulic pump (201) and the small hydraulic pump (202) respectively; The oil supply pipeline (6) comprises a first oil supply pipeline (601) and a second oil supply pipeline (602), wherein the first oil supply pipeline (601) and the second oil supply pipeline (602) respectively connect the hydraulic oil tank (1) and the rapid braking module (3), a large hydraulic pump (201) is provided on the first oil supply pipeline (601), and a small hydraulic pump (202) is provided on the second oil supply pipeline (602).

3. The booster system for a hydraulic oil rod according to claim 2, characterized in that: The overflow pipe (8) comprises a first overflow pipe (801) and a second overflow pipe (802); the large hydraulic pump (201) is also connected to the hydraulic oil tank (1) via the first overflow pipe (801); the small hydraulic pump (202) is also connected to the hydraulic oil tank (1) via the second overflow pipe (802); and overflow modules (4) are provided on both the first overflow pipe (801) and the second overflow pipe (802).

4. The booster system for a hydraulic oil rod according to claim 1, characterized in that: The oil supply brake module (301) comprises a first electro-hydraulic reversing valve (3011), a first hydraulically controlled one-way valve (3012) and a first one-way throttle valve (3013). The first electro-hydraulic reversing valve (3011) is arranged on the oil supply pipeline (6) and the oil return pipeline (7). The first hydraulically controlled one-way valve (3012) and the first one-way throttle valve (3013) are arranged on the oil supply pipeline (6).

5. The booster system for a hydraulic oil rod according to claim 4, characterized in that: The first port of the first electro-hydraulic reversing valve (3011) is connected to the rodless chamber of the hydraulic cylinder through the first hydraulically controlled one-way valve (3012) and the first one-way throttle valve (3013). The second opening of the first electro-hydraulic reversing valve (3011) is connected to the rod chamber of the hydraulic cylinder via an oil return pipeline (7); The third port of the first electro-hydraulic reversing valve (3011) is connected to the hydraulic oil tank (1) through the multi-pump system (2); The fourth port of the first electro-hydraulic reversing valve (3011) is connected to the hydraulic oil tank (1) via a cooling module (5).

6. The booster system for a hydraulic oil rod according to claim 1, characterized in that: The oil return module (302) comprises a second electromagnetic reversing valve (3021), a second hydraulically controlled one-way valve (3022) and a second one-way throttle valve (3023). The second electromagnetic reversing valve (3021) is also connected to the oil supply pipeline (6) and the oil return pipeline (7). The second hydraulically controlled one-way valve (3022) and the second one-way throttle valve (3023) are also connected to the oil supply pipeline (6).

7. The booster system for a hydraulic oil rod according to claim 6, characterized in that: The first port of the second electromagnetic reversing valve (3021) is connected to the rodless chamber of the hydraulic cylinder through the second hydraulically controlled one-way valve (3022) and the second one-way throttle valve (3023). The second port of the second electromagnetic reversing valve (3021) is also provided with a second one-way throttle valve (3023) and is connected to the rod chamber of the hydraulic oil cylinder, and the feedback signal of the second one-way throttle valve (3023) at the second port of the second electromagnetic reversing valve (3021) is connected to the feedback signal of the second one-way throttle valve (3023) at the first port of the second electromagnetic reversing valve (3021); The third port of the second electromagnetic reversing valve (3021) is connected to the hydraulic oil tank (1) through the multi-pump system (2); The fourth port of the second electromagnetic reversing valve (3021) is connected to the hydraulic oil tank (1) through the cooling module (5).

8. The booster system for a hydraulic oil rod according to claim 1, characterized in that: The overflow module (4) is an electromagnetic overflow valve, and the low-pressure outlet and the high-pressure outlet of the electromagnetic overflow valve are respectively connected to the oil return pipeline (7).

9. The booster system for a hydraulic oil rod according to claim 1, characterized in that: The cooling module (5) is a water cooler, and water flowing through the cooling module (5) performs convection heat exchange with the oil return pipe (7) to cool the hydraulic oil.

10. A rapid braking method using the boosting system according to any one of claims 1 to 9, characterized in that: The rapid braking method of the boost system comprises the following: S1: starting a part of the pumps of the multi-pump system (2) to increase the air pressure in the oil supply pipeline (6), so that the hydraulic oil in the hydraulic oil tank (1) flows into the oil supply pipeline (6); S2: The hydraulic oil in the oil supply pipeline (6) also flows back to the hydraulic oil tank (1) through the overflow module (4), so that the oil supply pipeline (6) is adjusted to an oil supply flow rate of 95 L / min; S3: energize the coil at one end of the electromagnetic reversing valve of the oil supply brake module (301) to make the hydraulic oil in the oil supply pipeline (6) flow into the rodless chamber of the hydraulic cylinder, then energize the coil at one end of the electromagnetic reversing valve of the oil return module (302) to make the rod chamber of the hydraulic cylinder flow back to the hydraulic oil tank (1) through the oil return pipeline (7), so that the piston rod of the hydraulic cylinder extends; S4: When the piston rod of the hydraulic cylinder is extended to the top, the coil at the other end of the electromagnetic reversing valve of the oil supply brake module (301) is energized to allow the hydraulic oil in the oil supply pipeline (6) to flow into the rod chamber of the hydraulic cylinder; then the coil at the other end of the electromagnetic reversing valve of the oil return module (302) is energized to allow the rodless chamber of the hydraulic cylinder to flow back to the hydraulic oil tank (1) through the oil return pipeline (7), so that the piston rod of the hydraulic cylinder is retracted; S5: When the hydraulic cylinder needs to be driven quickly, the passage of the electromagnetic reversing valve of the oil return module (302) is not opened when the piston rod is extended, so that the hydraulic oil in the rod chamber of the hydraulic cylinder flows into the electromagnetic reversing valve of the brake module (301) through the oil return pipeline (7), and flows into the oil supply pipeline (6) through the electromagnetic reversing valve, thereby realizing a differential circuit and allowing the piston rod of the hydraulic cylinder to be extended quickly; S6: When it is necessary to adjust the expansion and contraction pressure of the hydraulic cylinder, this can be achieved by controlling the hydraulic oil flowing back from the overflow module (4) to the hydraulic oil tank (1); or another part of the pump of the multi-pump system (2) can be started to adjust the oil supply pipeline (6) to an oil supply flow rate of 119L / min, thereby achieving a pressurization action.

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