Pressurizing oil cylinder with automatic reversing function and using method and equipment thereof

Abstract

The invention relates to the technical field of hydraulic oil cylinders, and discloses a pressurizing oil cylinder with an automatic reversing function and a using method and equipment thereof, the pressurizing oil cylinder comprises a pressurizing cylinder, a piston rod and a hydraulic control reversing valve, the piston rod is arranged in the pressurizing cylinder, and the hydraulic control reversing valve is connected to a feedback groove in the piston rod through a feedback oil way; the pressure cylinder is connected with an oil inlet channel port P and an oil return channel port T through a hydraulic control reversing valve; by adding hydraulic oil into the pushing and pressing liquid cavities on the different sides of the hydraulic control reversing valve, the stable moving state of the valve element can be controlled more effectively, it is ensured that the reversing process is smoother, impact and vibration are reduced, and system assemblies are better protected; when reversing occurs, hydraulic oil can be quickly transmitted to the pushing and pressing liquid cavity on the other side of the hydraulic control reversing valve through different feedback grooves, so that reversing operation is quicker, and the response performance of the whole hydraulic system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and in particular to a booster cylinder with an automatic reversing function and a use method and device thereof. Background Art

[0002] As the flow demand of ultra-high pressure systems increases, the output flow of a single reciprocating supercharger often fails to meet the requirements. The existing solution is to make a single supercharger larger and larger. Due to the increase in the volume and inner hole of the supercharger, the cost of tools and processing increases exponentially. At the same time, if the supercharger is made too large, there will be a huge impact when switching the oil during reversing, which will affect the life of the supercharger and the stability of the high-pressure output.

[0003] During the reciprocating motion of a single reciprocating booster, when the hydraulically controlled reversing valve switches direction, the high-pressure output is 0. At this time, pressure fluctuations will occur at the high-pressure end. In certain specific occasions, such as the pressure maintenance process of a diamond press, continuous high-pressure output must be ensured.

[0004] For example, a dual-cylinder bidirectional reciprocating supercharger includes two supercharging mechanisms, both of which are provided with a P port, a T port and an HP port, and the P ports of the two supercharging mechanism bodies are connected, the T ports of the two supercharging mechanisms are connected, and the HP ports of the two supercharging mechanisms are connected; the two supercharging mechanisms are supercharging mechanism No. 1 and supercharging mechanism No. 2. The supercharger described in the present invention adopts the form of a dual supercharging mechanism, and when in use, cooperates with two reversing valve mechanisms to simultaneously drive the two supercharging mechanisms. When the reversing valve is reversed, the large fluctuation caused by the simultaneous reversing is eliminated.

[0005] However, the feedback groove of the patent is only connected to one side of the reversing valve at a time. When the return oil is reversed, it will be affected by the system return oil back pressure, resulting in an increase in the oil return resistance, which will directly affect the response speed of the reversing valve. Summary of the invention

[0006] In order to overcome the technical problems existing in the above-mentioned prior art, the present invention provides a booster oil cylinder with automatic reversing function;

[0007] Another object of the present invention is to provide a method for using a booster oil cylinder with an automatic reversing function;

[0008] Another object of the present invention is to provide a device for a booster cylinder with an automatic reversing function.

[0009] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0010] A booster oil cylinder with automatic reversing function, comprising: a booster cylinder, a piston rod and a hydraulically controlled reversing valve, wherein the piston rod is arranged inside the booster cylinder and forms a first cavity and a second cavity, and a plurality of feedback grooves are arranged on the piston rod;

[0011] The piston rod is arranged inside the booster cylinder and forms a first cavity and a second cavity. The piston rod is provided with a plurality of feedback grooves. The hydraulically controlled reversing valve is connected to the feedback grooves on the piston rod through a feedback oil circuit.

[0012] The first cavity and the second cavity are both connected to an oil inlet channel P port and an oil return channel T port through a hydraulically controlled reversing valve, and the oil inlet channel P port and the oil return channel T port are also connected to the hydraulically controlled reversing valve through a plurality of feedback grooves and feedback liquid passages, respectively.

[0013] Furthermore, the hydraulically controlled reversing valve comprises a valve body and a valve core, wherein the valve core is located in the axial hole of the valve body and can move along the length direction of the valve body, and valve plugs are provided on both sides of the valve core, and the valve plugs and the valve body directly form a pushing liquid cavity;

[0014] The oil inlet passage P port and the oil return passage T port may also be connected to the pushing liquid cavity of the valve body through the feedback groove.

[0015] Preferably, the valve core selectively connects the two groups of working channels to the first cavity and the second cavity by moving along the length direction of the valve body.

[0016] Furthermore, at least two groups of working channels are provided in the valve core, the oil inlet channel P port and the oil return channel T port are both connected to the working channel of the hydraulically controlled reversing valve through the working fluid passage, and the working channel of the hydraulically controlled reversing valve is connected to the first cavity and the second cavity through the working fluid passage.

[0017] Furthermore, the booster cylinder comprises a main cylinder body and auxiliary cylinder bodies symmetrically arranged on both sides of the main cylinder body, and the piston rod comprises a main piston arranged in the inner cavity of the main cylinder body and an auxiliary rod arranged in the inner cavity of the auxiliary cylinder body.

[0018] Furthermore, two groups of feedback channels are respectively provided on the main piston, one group of feedback channels is two feedback grooves, and the spacing between each group of feedback grooves in the stroke direction of the main piston is equal.

[0019] Furthermore, the main cylinder body is also provided with a plurality of slots, and the main piston can correspond the feedback slots to the slots through movement; the oil inlet channel P port and the oil return channel T port are also connected to the ultra-high pressure oil port HP through high-pressure pipelines respectively; a plurality of one-way valves are arranged on the high-pressure pipeline; the booster cylinder and the piston rod adopt a high-pressure cylinder body combined with a high-pressure piston structure; the oil return channel T port is connected to the driving component through a pipeline.

[0020] A method for using a booster oil cylinder with an automatic reversing function, the method for using the booster oil cylinder comprising the following steps:

[0021] S1: When working, the multi-pump system is driven, and the high pressure causes the hydraulic oil in the hydraulic oil tank to flow into the oil supply pipeline. The hydraulic oil in the oil supply pipeline enters the rodless cavity of the hydraulic cylinder through the quick brake module, pushing the piston rod to move toward the end of the rod cavity of the hydraulic cylinder. The hydraulic oil in the rod cavity of the hydraulic cylinder flows back to the hydraulic oil tank through the return oil pipeline;

[0022] S2: When the hydraulic oil flows into the feedback groove, the feedback groove is in a closed state, so the valve core of the hydraulic control reversing valve (3) does not produce displacement reversing action, and only the working fluid passage leading to the internal working channel of the hydraulic control reversing valve is open, and the pressure oil continuously enters the second cavity on the right side of the piston rod through the working fluid passage of the hydraulic control reversing valve, thereby continuing to increase the pressure;

[0023] S3: When the piston rod of the booster cylinder moves to the left extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove on the right side of the right group of the piston rod through the outer oil circuit on the right, and then enters the push liquid chamber at the right end of the hydraulic control reversing valve; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve passes through the inner feedback groove on the left side of the right group of the piston rod, enters the outer oil circuit on the right and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0024] S4: This reciprocating cycle is repeated to achieve reciprocating motion. By inputting low-pressure hydraulic oil at the oil inlet channel P port, high-pressure hydraulic oil can be output at the oil return channel T port.

[0025] Furthermore, a liquid level sensor is provided in the hydraulic oil tank, an oil drain nozzle is provided at the bottom of the hydraulic oil tank, and the hydraulic oil tank is connected to the outside world through an air filter.

[0026] A device for a booster cylinder with an automatic reversing function, the device includes a hydraulic drive system responsible for providing a stable hydraulic source and driving the movement of the booster cylinder by controlling the direction and pressure of fluid flow, and also includes a solenoid valve, which is used to control the flow direction of the hydraulic oil to ensure that the booster cylinder can be smoothly reversed as required.

[0027] Furthermore, the device is also provided with a reversing control mechanism, which can automatically complete the reversing operation through internal mechanical design or external control signals. The reversing control mechanism can trigger the switching of the hydraulically controlled reversing valve based on pressure sensing or displacement sensing by detecting the pressure inside the oil cylinder or the piston position.

[0028] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0029] ① By connecting the multiple feedback grooves of the piston rod to the push liquid chambers on both sides of the hydraulic control reversing valve, the return oil back pressure of the system reversing is reduced;

[0030] By adding hydraulic oil to the push liquid chambers on different sides of the hydraulically controlled reversing valve, the stable movement state of the valve core can be more effectively controlled to ensure a smoother switching process, reduce shock and vibration, and better protect system components; when reversing occurs, the hydraulic oil can be quickly transferred to the push liquid chamber on the other side of the hydraulically controlled reversing valve through different feedback grooves, making the switching operation faster and improving the response performance of the entire hydraulic system.

[0031] ② The low-pressure hydraulic oil from the oil inlet channel P port enters the feedback groove to achieve automatic reciprocating pressure increase;

[0032] When the low-pressure hydraulic oil from the oil inlet channel P port enters the working channel of the hydraulically controlled reversing valve, the hydraulic oil is injected into the first cavity of the booster cylinder, and the piston rod is pushed to move; when the piston rod moves to the side end of the booster cylinder, the feedback groove connects the oil channel P port with the pushing liquid cavity at one end of the reversing valve, and moves the valve core along the length direction of the valve body, thereby connecting the other working channel of the hydraulically controlled reversing valve, and injecting hydraulic oil into the second cavity of the booster cylinder, and repeating the cycle to achieve automatic reciprocating motion.

[0033] ③ A one-way valve is provided on the high-pressure pipeline connecting the oil inlet channel P port and the ultra-high pressure oil port HP to prevent backflow;

[0034] When the system pressure fluctuates or the load changes suddenly, it prevents the oil in the high-pressure pipeline from flowing back to the lower pressure area, protecting the pump and other hydraulic components from damage; it can also limit the direction of oil flow through the one-way valve, which helps to stabilize the system pressure, reduce unnecessary pressure fluctuations, and improve the stability and reliability of the entire hydraulic system.

[0035] ④ Two groups of four feedback grooves are provided on the main piston to stably provide balanced feedback hydraulic oil to the push liquid chambers on different sides of the hydraulic control reversing valve;

[0036] When the piston rod moves to the side end of the booster cylinder 1, a group of two feedback grooves respectively connect the oil channel P port with the pushing liquid chamber at one end of the hydraulic control reversing valve, and connect the return oil channel T port with the pushing liquid chamber at the other end of the hydraulic control reversing valve, so that the hydraulic oil can stably enter the pushing liquid chamber at one end, and the hydraulic oil in the pushing liquid chamber at the other end can stably flow to the return oil channel T port, realizing rapid conversion, reducing energy consumption and improving system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1It is a schematic diagram of the piston rod of the booster cylinder moving to the right limit position;

[0039] Figure 2 It is a schematic diagram showing that the piston rod of the booster cylinder is in the middle of the left booster movement;

[0040] Figure 3 This is a schematic diagram of the piston rod of the booster cylinder moving to the left extreme position.

[0041] in,

[0042] 1. booster cylinder; 101. first cavity; 102. second cavity;

[0043] 2. Piston rod; 201. Main piston; 202. Auxiliary rod;

[0044] 3. Hydraulic control reversing valve;

[0045] 4. Feedback slot;

[0046] 5. Feedback fluid passage;

[0047] 6. Working fluid passage;

[0048] 7. High-pressure pipeline;

[0049] 8. Check valve. DETAILED DESCRIPTION

[0050] 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.

[0051] 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.

[0052] Example 1

[0053] like Figure 1-3 As shown, this embodiment discloses a booster oil cylinder with automatic reversing function, including: a booster cylinder 1, a piston rod 2 and a hydraulically controlled reversing valve 3, the piston rod 2 is arranged inside the booster cylinder 1 and forms a first cavity 101 and a second cavity 102, and a plurality of feedback grooves 4 are provided on the piston rod 2;

[0054] The piston rod 2 is arranged inside the booster cylinder 1 and forms a first cavity 101 and a second cavity 102. A plurality of feedback grooves 4 are arranged on the piston rod 2. The hydraulically controlled reversing valve 3 is connected to the feedback grooves 4 on the piston rod 2 through a feedback oil circuit.

[0055] The first cavity 101 and the second cavity 102 are both connected to the oil inlet channel P and the oil return channel T through the hydraulically controlled reversing valve 3. The oil inlet channel P and the oil return channel T are also connected to the hydraulically controlled reversing valve 3 through multiple feedback grooves 4 and feedback liquid passages 5, respectively.

[0056] (like Figure 1 As shown in the figure, when the piston rod 2 of the booster cylinder 1 moves to the right extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove 4 on the left side of the left group of the piston rod 2 through the outer oil circuit on the left, and then enters the push liquid chamber at the left end of the hydraulic control reversing valve 3; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve 3 passes through the inner feedback groove 4 on the right side of the left group of the piston rod 2, enters the right outer oil circuit and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve 3 moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0057] (like Figure 2 As shown in the figure, the feedback groove 4 is in a closed state, so the valve core of the hydraulically controlled reversing valve 3 will not produce displacement and reversing action, and only the working fluid passage 6 leading to the internal working channel of the hydraulically controlled reversing valve 3 is connected, and the pressure oil continuously passes through the working fluid passage 6 of the hydraulically controlled reversing valve 3 into the second cavity 102 on the right side of the piston rod 2, so as to realize continuous pressurization;

[0058] (like Figure 2 As shown in the figure, when the piston rod 2 of the booster cylinder 1 moves to the left extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove 4 on the right side of the right group of the piston rod 2 through the outer oil circuit on the right side, and then enters the push liquid chamber at the right end of the hydraulic control reversing valve 3; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve 3 passes through the inner feedback groove 4 on the left side of the right group of the piston rod 2, enters the outer oil circuit on the right side and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve 3 moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0059] This reciprocating cycle realizes reciprocating motion. By inputting low-pressure hydraulic oil at the oil inlet channel P port, high-pressure hydraulic oil can be output at the oil return channel T port.

[0060] As a specific implementation, the hydraulically controlled reversing valve 3 includes a valve body and a valve core, the valve core is located in the axial hole of the valve body and can move along the length direction of the valve body, valve plugs are provided on both sides of the valve core, and the valve plug and the valve body directly form a pushing liquid cavity;

[0061] The oil inlet channel P port and the oil return channel T port can also be connected to the push liquid cavity of the valve body through the feedback groove 4;

[0062] At least two groups of working channels are provided in the valve core. The oil inlet channel P port and the oil return channel T port are both connected to the working channel of the hydraulically controlled reversing valve 3 through the working fluid passage 6. The working channel of the hydraulically controlled reversing valve 3 is connected to the first cavity 101 and the second cavity 102 through the working fluid passage 6.

[0063] Specifically, when the low-pressure hydraulic oil at the oil inlet channel P port enters the working channel of the hydraulically controlled reversing valve 3, the hydraulic oil is injected into the first cavity 101 of the booster cylinder 1, and the piston rod 2 is pushed to move; when the piston rod 2 moves to the side end of the booster cylinder 1, the feedback groove 4 connects the oil channel P port with the pushing liquid cavity at one of the side ends of the hydraulically controlled reversing valve 3, and moves the valve core along the length direction of the valve body, thereby connecting the other working channel of the hydraulically controlled reversing valve 3, and injecting hydraulic oil into the second cavity 102 of the booster cylinder 1, and repeating the cycle to realize automatic reciprocating motion.

[0064] As a specific embodiment, the booster cylinder 1 includes a main cylinder body and auxiliary cylinder bodies symmetrically arranged on both sides of the main cylinder body, and the piston rod 2 includes a main piston 201 arranged in the inner cavity of the main cylinder body and an auxiliary rod 202 arranged in the inner cavity of the auxiliary cylinder body;

[0065] Two groups of feedback channels are respectively provided on the main piston 201. One group of feedback channels is two feedback grooves 4. The spacing between each group of feedback grooves 4 in the stroke direction of the main piston 201 is equal.

[0066] The main cylinder body is also provided with a plurality of notches, and the main piston 201 can move to make the feedback groove 4 correspond to the notches.

[0067] Specifically, the multiple feedback grooves 4 of the main cylinder body are connected to the push liquid chambers on both sides of the hydraulic control reversing valve 3, thereby reducing the return oil back pressure of the system reversing;

[0068] By adding hydraulic oil to the pushing liquid chambers on different sides of the hydraulically controlled reversing valve 3, the stable movement state of the valve core can be more effectively controlled to ensure a smoother switching process, reduce impact and vibration, and better protect system components; when switching occurs, the hydraulic oil can be quickly transmitted to the pushing liquid chamber on the other side of the hydraulically controlled reversing valve 3 through different feedback grooves, making the switching operation faster and improving the response performance of the entire hydraulic system.

[0069] Specifically, two groups of four feedback grooves 4 are provided on the main piston 201 to stably provide balanced feedback hydraulic oil to the push liquid chambers on different sides of the hydraulic control reversing valve 3;

[0070] When the piston rod 2 moves to the side end of the booster cylinder 1, a group of two feedback grooves 4 respectively connect the oil channel P port with the pushing liquid cavity at one end of the hydraulically controlled reversing valve 3, and connect the return oil channel T port with the pushing liquid cavity at the other end of the hydraulically controlled reversing valve 3, so that the hydraulic oil can stably enter the pushing liquid cavity at one end, and the hydraulic oil in the pushing liquid cavity at the other end can stably flow to the return oil channel T port, thereby realizing rapid conversion, reducing energy consumption and improving system efficiency.

[0071] Specifically, the two sets of feedback channels on the main piston 201 realize precise control of the hydraulic oil flow path; as the main piston 201 moves, the two feedback grooves 4 will be connected with the corresponding working channels of the hydraulically controlled reversing valve 3 in turn, ensuring that the oil pressure can be accurately transmitted to the pushing liquid chamber of the hydraulically controlled reversing valve 3, thereby controlling the movement of the valve core of the hydraulically controlled reversing valve 3, thereby improving the accuracy of system control.

[0072] Example 2

[0073] like Figure 1-3 As shown, this embodiment discloses a booster oil cylinder with automatic reversing function, including: a booster cylinder 1, a piston rod 2 and a hydraulically controlled reversing valve 3, the piston rod 2 is arranged inside the booster cylinder 1 and forms a first cavity 101 and a second cavity 102, and a plurality of feedback grooves 4 are provided on the piston rod 2;

[0074] The piston rod 2 is arranged inside the booster cylinder 1 and forms a first cavity 101 and a second cavity 102. A plurality of feedback grooves 4 are arranged on the piston rod 2. The hydraulically controlled reversing valve 3 is connected to the feedback grooves 4 on the piston rod 2 through a feedback oil circuit.

[0075] The first cavity 101 and the second cavity 102 are both connected to the oil inlet channel P and the oil return channel T through the hydraulically controlled reversing valve 3. The oil inlet channel P and the oil return channel T are also connected to the hydraulically controlled reversing valve 3 through multiple feedback grooves 4 and feedback liquid passages 5, respectively.

[0076] As a specific implementation manner, the oil inlet channel P port and the oil return channel T port are also connected to the ultra-high pressure oil port HP through the high-pressure pipeline 7 respectively.

[0077] Specifically, when the system needs to provide ultra-high pressure oil in a short time to cope with special working conditions (such as load breakthrough, rapid action), high pressure oil can be directly supplied to the main oil circuit through the HP port to quickly increase the system pressure and ensure efficient completion of the action;

[0078] In certain emergency situations, such as failure of the main oil supply system, the necessary pressure can be maintained through the backup oil circuit connected to the HP port to ensure that the equipment can be safely shut down or perform emergency operations to avoid accidents caused by insufficient pressure.

[0079] As a specific implementation, a plurality of one-way valves 8 are provided on the high-pressure pipeline 7 .

[0080] Specifically, a one-way valve 8 is provided on the high-pressure pipeline 7 connecting the oil inlet channel P port and the ultra-high pressure oil port HP, which can be used to prevent backflow;

[0081] When the system pressure fluctuates or the load changes suddenly, the one-way flow effect of the one-way valve 8 can prevent the oil in the high-pressure pipeline 7 from flowing back to the ultra-high pressure oil port HP, protecting the pump and other hydraulic components from damage; the one-way valve 8 can also limit the direction of oil flow, which helps to stabilize the system pressure, reduce unnecessary pressure fluctuations, and improve the stability and reliability of the entire hydraulic system.

[0082] As a specific implementation, the booster cylinder 1 and the piston rod 2 adopt a high-pressure cylinder body combined with a high-pressure piston structure.

[0083] Specifically, the high-pressure cylinder can withstand higher system pressure without leakage or damage, and matching the high-pressure piston with the high-pressure cylinder has stronger sealing performance and material strength, ensuring stability and safety during high-pressure operations;

[0084] The high-pressure cylinder allows the oil to flow under high-pressure conditions, with a fast flow speed and small pressure loss, so it can push the piston rod 2 to move faster, shorten the working cycle time, and improve the response speed and dynamic performance of the overall system.

[0085] As a specific implementation manner, the oil return channel T port is connected to the driving component through a pipeline.

[0086] Specifically, the ultra-high pressure oil at the T port of the oil return channel is directly transmitted to the driving component, which can provide a strong driving force, ensuring that the driving component obtains sufficient energy in a short time, completes fast and powerful movements, and achieves instantaneous high power output;

[0087] A sophisticated control system is also installed on the pipeline, including pressure sensors, safety valves, etc., to ensure a stable supply of ultra-high pressure oil, and to be able to quickly cut it off under abnormal circumstances to protect the equipment from damage.

[0088] Example 3

[0089] like Figure 1-3 As shown, this embodiment discloses a method for using a booster cylinder with an automatic reversing function, characterized in that the method for using the booster cylinder includes the following steps:

[0090] S1: 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;

[0091] S2: When the hydraulic oil flows into the feedback groove 4, the feedback groove 4 is in a closed state, so the valve core of the hydraulic control reversing valve 3 will not produce displacement reversing action, and only the working fluid passage 6 leading to the internal working channel of the hydraulic control reversing valve 3 is connected, and the pressure oil continuously passes through the working fluid passage 6 of the hydraulic control reversing valve 3 into the second cavity 102 on the right side of the piston rod 2 to achieve continued pressurization;

[0092] S3: When the piston rod 2 of the booster cylinder 1 moves to the left extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove 4 on the right side of the right group of the piston rod 2 through the outer oil circuit on the right, and then enters the push liquid chamber at the right end of the hydraulic control reversing valve 3; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve 3 passes through the inner feedback groove 4 on the left side of the right group of the piston rod 2, enters the outer oil circuit on the right and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve 3 moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0093] S4: This reciprocating cycle is repeated to achieve reciprocating motion. By inputting low-pressure hydraulic oil at the oil inlet channel P port, high-pressure hydraulic oil can be output at the oil return channel T port.

[0094] This method uses the cooperation of the hydraulically controlled reversing valve and the feedback groove to enable the booster cylinder to automatically complete the reversal when a certain pressure condition is reached without manual intervention. The entire process is automatically completed under the drive of the internal pressure change of the system, which reduces the workload of the operator and improves the automation level of the equipment.

[0095] During use, the hydraulic oil first enters the rodless chamber through the oil supply pipe to push the piston to move, while the hydraulic oil in the rod chamber flows back to the oil tank through the oil return pipe to ensure smooth circulation inside the hydraulic cylinder. This dual-chamber coordinated operation method improves the working efficiency of the booster cylinder and reduces energy loss.

[0096] As a specific implementation, a liquid level sensor is further provided in the hydraulic oil tank 1, and an oil drain nozzle is further provided at the bottom of the hydraulic oil tank 1. The hydraulic oil tank is also connected to the outside world through an air filter.

[0097] Specifically, the hydraulic system has strict requirements on the demand for hydraulic oil. Insufficient oil may cause the hydraulic pump to be emptied, resulting in cavitation, which seriously affects the normal operation of the system. The liquid level sensor can detect insufficient oil in advance and issue an alarm so that the hydraulic oil can be replenished in time to avoid failures;

[0098] Hydraulic oil may be contaminated or aged after long-term use, affecting the performance of the hydraulic system. The drain nozzle is convenient for regular discharge of old oil, which is convenient for maintenance personnel to replace hydraulic oil and ensure that the system always uses clean and high-performance hydraulic oil;

[0099] The liquid level sensor ensures real-time monitoring of the hydraulic oil level to prevent malfunctions caused by insufficient oil; the oil drain nipple facilitates oil drainage and maintenance, ensuring the long-term cleanliness and stability of the system; the air filter effectively prevents external pollutants from entering the system, maintains the pressure balance inside and outside the oil tank, and helps to extend the service life of the equipment.

[0100] Example 4

[0101] A device for a booster cylinder with an automatic reversing function, the device includes a hydraulic drive system responsible for providing a stable hydraulic source and driving the movement of the booster cylinder by controlling the direction and pressure of fluid flow, and also includes a solenoid valve, which is used to control the flow direction of the hydraulic oil to ensure that the booster cylinder can be smoothly reversed as required.

[0102] Specifically, the device integrates an automatic reversing function, relying on a solenoid valve to control the flow of hydraulic oil, so that the booster cylinder can automatically complete the reversing operation. Compared with the traditional manual control reversing system, the device greatly reduces manual intervention and reduces the complexity of operation. It is especially suitable for long-term, continuous working application scenarios, and improves the automation level of the system.

[0103] The equipment provides a stable hydraulic source through the hydraulic drive system, combined with the solenoid valve to control the fluid flow, to achieve automatic reversing and precise pressure control, thus having significant beneficial effects such as efficient automation, stable operation, rapid response, precise pressure control, long life, energy saving and environmental protection, safety and reliability.

[0104] As a specific implementation, the device is also provided with a reversing control mechanism, which can automatically complete the reversing operation through internal mechanical design or external control signals. The reversing control mechanism can trigger the switching of the hydraulically controlled reversing valve 3 based on pressure sensing or displacement sensing by detecting the pressure inside the cylinder or the piston position.

[0105] Specifically, the reversing control mechanism can detect the pressure state or piston position inside the oil cylinder through pressure sensing or displacement sensing. The monitoring ensures that the oil cylinder can accurately complete the reversal under the set pressure or displacement conditions. The precise control of the reversing process avoids pressure fluctuations or mechanical shocks caused by improper reversing, ensuring the stability of the system and the reliability of long-term operation.

[0106] The reversing control mechanism can complete the reversing operation in a variety of ways, such as realizing reversing based on the mechanical design inside the cylinder, or triggering reversing through an external control signal. The reversing mechanism enables the equipment to be adjusted according to different working conditions and adapt to complex working environments. Whether it is a scenario with large pressure changes or frequent load changes, the equipment can respond flexibly through the reversing control mechanism.

[0107] How it works

[0108] When the piston rod 2 of the booster cylinder 1 moves to the right extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove 4 on the left side of the left group of the piston rod 2 through the outer oil circuit on the left, and then enters the push liquid chamber at the left end of the hydraulic control reversing valve 3; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve 3 passes through the inner feedback groove 4 on the right side of the left group of the piston rod 2, enters the right outer oil circuit and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve 3 moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0109] The feedback grooves 4 are all in a closed state, so the valve core of the hydraulically controlled reversing valve 3 will not produce displacement reversing action, and only the working fluid passage 6 leading to the internal working channel of the hydraulically controlled reversing valve 3 is connected, and the pressure oil continuously passes through the working fluid passage 6 of the hydraulically controlled reversing valve 3 into the second cavity 102 on the right side of the piston rod 2 to achieve continued pressurization;

[0110] When the piston rod 2 of the booster cylinder 1 moves to the left extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove 4 on the right side of the right group of the piston rod 2 through the outer oil circuit on the right, and then enters the push liquid chamber at the right end of the hydraulic control reversing valve 3; while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve 3 passes through the inner feedback groove 4 on the left side of the right group of the piston rod 2, enters the outer oil circuit on the right and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve 3 moves to the right under the push of the oil pressure difference to realize the oil circuit switching;

[0111] This reciprocating cycle realizes reciprocating motion. By inputting low-pressure hydraulic oil at the oil inlet channel P port, high-pressure hydraulic oil can be output at the oil return channel T port.

[0112] 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 cylinder with automatic reversing function, characterized in that: include: A booster cylinder (1), a piston rod (2) and a hydraulically controlled reversing valve (3), wherein the piston rod (2) is arranged inside the booster cylinder (1) and forms a first cavity (101) and a second cavity (102), and the piston rod (2) is provided with a plurality of feedback grooves (4); The piston rod (2) is arranged inside the booster cylinder (1) and forms a first cavity (101) and a second cavity (102); a plurality of feedback grooves (4) are provided on the piston rod (2); and the hydraulically controlled reversing valve (3) is connected to the feedback grooves (4) on the piston rod (2) via a feedback oil circuit; The first cavity (101) and the second cavity (102) are both connected to an oil inlet channel P port and an oil return channel T port via a hydraulically controlled reversing valve (3), and the oil inlet channel P port and the oil return channel T port are also connected to the hydraulically controlled reversing valve (3) via a plurality of feedback grooves (4) and a feedback liquid passage (5), respectively.

2. The booster cylinder with automatic reversing function according to claim 1, characterized in that: The hydraulically controlled reversing valve (3) comprises a valve body and a valve core, wherein the valve core is located in the axial hole of the valve body and can move along the length direction of the valve body, and valve plugs are provided on both sides of the valve core, and the valve plugs and the valve body directly form a pushing liquid cavity; The oil inlet channel P port and the oil return channel T port can also be connected to the push liquid cavity of the valve body through the feedback groove (4).

3. The booster cylinder with automatic reversing function according to claim 2 is characterized in that: At least two groups of working channels are provided in the valve core, the oil inlet channel P port and the oil return channel T port are both connected to the working channel of the hydraulically controlled reversing valve (3) through the working fluid passage (6), and the working channel of the hydraulically controlled reversing valve (3) is connected to the first cavity (101) and the second cavity (102) through the working fluid passage (6).

4. The booster cylinder with automatic reversing function according to claim 3 is characterized in that: The booster cylinder (1) comprises a main cylinder body (101) and auxiliary cylinder bodies (102) symmetrically arranged on both sides of the main cylinder body (101); the piston rod (2) comprises a main piston (201) arranged in the inner cavity of the main cylinder body (101) and an auxiliary rod (202) arranged in the inner cavity of the auxiliary cylinder body (102).

5. The booster cylinder with automatic reversing function according to claim 4, characterized in that: Two groups of feedback channels are respectively provided on the main piston (201), one group of feedback channels is two feedback grooves (4), and the spacing between each group of feedback grooves (4) in the stroke direction of the main piston (201) is equal.

6. The booster cylinder with automatic reversing function according to claim 4, characterized in that: The main cylinder body (101) is also provided with a plurality of notches, and the main piston (201) can move so that the feedback groove (4) corresponds to the notches; The oil inlet channel P port and the oil return channel T port are also connected to the ultra-high pressure oil port HP through high pressure pipelines (7) respectively; The high-pressure pipeline (7) is provided with a plurality of one-way valves (8); The booster cylinder (1) and the piston rod (2) adopt a high-pressure cylinder body combined with a high-pressure piston structure; The oil return channel T port is connected to the driving component through a pipeline.

7. A method for using the booster cylinder with automatic reversing function according to claim 6, characterized in that: The method of using the booster cylinder includes the following: S1: When working, the multi-pump system (2) is driven, and the hydraulic oil in the hydraulic oil tank (1) flows into the oil supply pipe (6) under high pressure. 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); S2: When the hydraulic oil flows into the feedback groove (4), the feedback groove (4) is in a closed state, so the valve core of the hydraulic control reversing valve (3) does not produce a displacement reversing action, and only the working fluid passage (6) leading to the internal working channel of the hydraulic control reversing valve (3) is connected, and the pressure oil continuously enters the second cavity (102) on the right side of the piston rod (2) through the working fluid passage (6) of the hydraulic control reversing valve (3), thereby realizing continued pressure increase; S3: When the piston rod (2) of the booster cylinder (1) moves to the left extreme position, the pressure oil at the oil inlet channel P port enters an outer feedback groove (4) on the right side of the right group of the piston rod (2) through the right outer oil circuit, and then enters the push liquid chamber at the right end of the hydraulic control reversing valve (3); while the oil in the push liquid chamber at the right end of the hydraulic control reversing valve (3) passes through the inner feedback groove (4) on the left side of the right group of the piston rod (2), enters the right outer oil circuit and flows to the oil return channel T port; the valve core of the hydraulic control reversing valve (3) moves to the right under the push of the oil pressure difference to realize oil circuit switching; S4: This reciprocating cycle is repeated to achieve reciprocating motion. By inputting low-pressure hydraulic oil at the oil inlet channel P port, high-pressure hydraulic oil can be output at the oil return channel T port.

8. The method for using the booster cylinder with automatic reversing function according to claim 7, characterized in that: A liquid level sensor is also provided in the hydraulic oil tank (1), an oil drain nozzle is also provided at the bottom of the hydraulic oil tank (1), and the hydraulic oil tank is also connected to the outside world via an air filter.

9. A method for using the booster cylinder with automatic reversing function according to claim 7, characterized in that: The device includes a hydraulic drive system responsible for providing a stable hydraulic source and driving the movement of the booster cylinder by controlling the direction and pressure of fluid flow. It also includes a solenoid valve, which is used to control the flow direction of the hydraulic oil to ensure that the booster cylinder can switch direction smoothly as required.

10. A device using the booster cylinder with automatic reversing function as claimed in claim 9, characterized in that: The device is also provided with a reversing control mechanism, which can automatically complete the reversing operation through internal mechanical design or external control signals. The reversing control mechanism can trigger the switching of the hydraulically controlled reversing valve (3) by detecting the pressure inside the oil cylinder or the piston position based on pressure sensing or displacement sensing.

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