A hydraulic station

Abstract

The utility model discloses a hydraulic station, including the main cylinder and main oil cylinder of linkage. The main cylinder includes the reversing trigger device that can send the cylinder piston of main cylinder moves to the signal of position and the main reversing valve that switches the two cylinder cavities air intake and exhaust of main cylinder according to the signal of reversing trigger device. The hydraulic station still includes the auxiliary cylinder and auxiliary oil cylinder of linkage. The auxiliary cylinder includes the auxiliary reversing valve, and the auxiliary reversing valve can obtain the valve core reversing to position information of main reversing valve, and switches the two cylinder cavities air intake and exhaust of auxiliary cylinder according to the information of acquisition. The oil supply port of auxiliary oil cylinder is in parallel with the oil supply port of main oil cylinder. The hydraulic station still includes the delay valve, and the delay valve controls the auxiliary reversing valve to interval certain time after obtaining the valve core reversing to position information of main reversing valve, and switches the two cylinder cavities air intake and exhaust of auxiliary cylinder according to the information of acquisition. The hydraulic station of the utility model sets up the delay valve, avoids the problem that auxiliary oil cylinder and main oil cylinder synchronous quick oil supply cause energy waste.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic power units, and in particular to a hydraulic power unit. Background Technology

[0002] A hydraulic power unit is a hydraulic device that supplies oil according to the required flow direction, pressure and flow rate, and is usually used in conjunction with machine tools that require hydraulically driven actuators.

[0003] See Figure 1 This is a schematic diagram of a hydraulic station provided in the prior art. As shown in the figure, the hydraulic station includes: a linked cylinder 1' and an oil cylinder 2'; wherein, the cylinder end caps on both sides of cylinder 1' are respectively provided with a first reversing trigger device 3' and a second reversing trigger device 4', and cylinder 1' is connected to a pneumatically controlled reversing valve 5', with the air source connected to the air inlet of the first reversing trigger device 3', the second reversing trigger device 4', and the pneumatically controlled reversing valve 5'; the working port A' of the pneumatically controlled reversing valve 5' is connected to one side of cylinder 1', and the working port B' of the pneumatically controlled reversing valve 5' is connected to cylinder 1'. The other side is connected; the first reversing trigger device 3' is connected to the pneumatic reversing valve 5' to control the pneumatic reversing valve 5' to start the working port A' of the pneumatic reversing valve 5' so that the working port A' of the pneumatic reversing valve 5' is connected to the air inlet P' of the pneumatic reversing valve 5'; the second reversing trigger device 4' is connected to the pneumatic reversing valve 5' to control the pneumatic reversing valve 5' to start the working port B' of the pneumatic reversing valve 5' so that the working port B' of the pneumatic reversing valve 5' is connected to the air inlet P' of the pneumatic reversing valve 5'.

[0004] The working process of the above hydraulic station is as follows: When the pneumatic piston is located on the left side of cylinder 1', the first reversing trigger device 3' is triggered to open, pushing the pneumatic reversing valve 5' to reverse. Compressed air enters cylinder 1' from working port A', specifically into the space to the left of the pneumatic piston, thus pushing the pneumatic piston to the right (the first reversing trigger device 3' is reset and cut off), driving the cylinder piston in oil cylinder 2' to the right; when the pneumatic piston moves to the right side of cylinder 1', the second reversing trigger device 4' is triggered to open, pushing the pneumatic reversing valve 5' to reverse, compressing... Air enters cylinder 1' through port B', specifically into the space to the right of the pneumatic piston, thus pushing the pneumatic piston to the left (the second reversing trigger device 4' is reset and cut off), which in turn drives the piston in cylinder 2' to the left, causing hydraulic oil to flow in and out. Cylinder 1' reciprocates to generate hydraulic output. When the set pressure is reached, cylinder 1' stops moving to maintain a constant pressure. Cylinder 1' remains in a pressurized state and stops moving, thus no longer consuming compressed air. Compared to traditional hydraulic stations, this reduces energy consumption and heat generation, achieving energy saving.

[0005] In the aforementioned hydraulic station, during the reversing process of the cylinder piston driving the oil cylinder piston, the oil supply to the cylinder will be interrupted and cannot be continuously supplied because the piston stroke is zero during reversing and it takes a certain amount of time for the oil cylinder piston to squeeze the oil in the cylinder to generate the required oil supply pressure in the initial stage after reversing.

[0006] In related technologies, hydraulic power units utilize auxiliary cylinders and auxiliary oil cylinders, with the auxiliary cylinders including auxiliary directional valves. This allows for continuous oil supply when the main oil cylinder's oil supply is interrupted during the main directional valve's reversing process, based on the valve core's reversing information. However, this technology suffers from energy waste due to the synchronous and rapid oil supply from the auxiliary and main cylinders. Utility Model Content

[0007] This invention provides a hydraulic station that avoids the energy waste caused by the synchronous and rapid oil supply between the auxiliary cylinder and the main cylinder.

[0008] This utility model provides a hydraulic power unit, including a main cylinder and a main oil cylinder that are linked. The main cylinder includes a reversing trigger device that can send a signal indicating that the piston of the main cylinder has moved to the correct position, and a main reversing valve that switches the intake and exhaust of the two cylinder chambers of the main cylinder according to the signal from the reversing trigger device. The hydraulic power unit also includes an auxiliary cylinder and an auxiliary oil cylinder that are linked. The auxiliary cylinder includes an auxiliary reversing valve that can acquire the valve core reversing information of the main reversing valve and switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the acquired information. The oil supply port of the auxiliary oil cylinder is connected in parallel with the oil supply port of the main oil cylinder. The hydraulic power unit also includes a time delay valve that controls the auxiliary reversing valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the acquired information after a certain time interval following the acquisition of the valve core reversing information of the main reversing valve.

[0009] In some embodiments, the two control ports of the auxiliary directional valve are respectively connected to the two working ports of the main directional valve via a first pipeline. A delay valve is installed on the first pipeline and controls the flow rate of gas in the first pipeline to decrease when it flows towards the auxiliary directional valve.

[0010] In some embodiments, a time delay valve controls the gas flow rate in the first pipeline to increase as it flows toward the main directional valve.

[0011] In some embodiments, the linked auxiliary cylinders and auxiliary hydraulic cylinders are at least two stages. The oil supply ports of each stage of the auxiliary hydraulic cylinder are connected in parallel with the oil supply port of the main hydraulic cylinder. Each stage of the auxiliary cylinder includes an auxiliary directional valve. The auxiliary directional valve of the first-stage auxiliary cylinder can obtain the valve core reversing position information of the main directional valve and switch the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder according to the obtained information. The auxiliary directional valve of a non-first-stage auxiliary cylinder can obtain the valve core reversing position information of the auxiliary directional valve of the previous stage auxiliary cylinder and switch the intake and exhaust of the two cylinder chambers of that stage of auxiliary cylinder according to the obtained information. The delay valve controls the auxiliary directional valve of the first-stage auxiliary cylinder to switch the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder after a certain interval after obtaining the valve core switching information of the main directional valve. It also controls the auxiliary directional valve of the non-first-stage auxiliary cylinder to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder of that stage after a certain interval after obtaining the valve core switching information of the auxiliary directional valve of the previous stage auxiliary cylinder.

[0012] In some embodiments, the two control ports of the auxiliary reversing valve of the non-first-stage auxiliary cylinder are respectively connected to the two working ports of the auxiliary reversing valve of the previous-stage auxiliary cylinder via a second pipeline. A delay valve is installed on the second pipeline and controls the flow rate of gas in the second pipeline to decrease when it flows to the auxiliary reversing valve of the non-first-stage auxiliary cylinder.

[0013] In some embodiments, the delay valve controls the gas in the second pipeline to increase the flow rate as it flows to the auxiliary reversing valve of the first-stage auxiliary cylinder.

[0014] In some embodiments, the delay valve includes a delay valve body, a delay valve block, and a delay slider. The delay valve body has a delay channel with a first opening and a second opening, both of which are connected to a first or second pipeline. The delay valve block is disposed within the delay channel. The delay slider is slidably disposed within the delay channel and connected to the inner wall of the delay channel via a spring. When air enters through the first opening, the delay slider is pushed by the spring to a first position within the delay channel, cooperating with the delay valve block to form a first gap for air to pass through the first opening. When air enters through the second opening, the spring is compressed and slides to a second position within the delay channel, cooperating with the delay valve block to form a second gap for air to pass through the second opening. The first gap is smaller than the second gap.

[0015] In some embodiments, the delay slider is provided with an air hole, the two ends of which are connected to a first opening and a second opening, respectively. A conical portion is provided on the outer wall of the delay valve block, the centerline of which coincides with the centerline of the air hole, and the conical portion is inserted into the air hole. The outer peripheral wall of the conical portion has a first annular surface and a second annular surface. The second annular surface is located on the side of the first annular surface away from the end of the conical portion. When the delay slider is in the first position, the first annular surface cooperates with the inner peripheral wall of the air hole to form a first gap. When the delay slider is in the second position, the second annular surface cooperates with the inner peripheral wall of the air hole to form a second gap.

[0016] In some embodiments, a first opening is provided at one end of the delay channel, a third opening is provided at the other end, and a second opening is provided on the side of the delay channel. A delay slider is sealed to the inner peripheral wall of the delay channel located between the first and second openings. A delay valve block is sealed to the inner peripheral wall of the delay channel located between the third and second openings.

[0017] In some embodiments, a first protrusion is provided on the inner peripheral wall of the delay channel, and the first protrusion is connected to the delay slider via a spring. A second protrusion is provided on the inner peripheral wall of the delay channel, and the second protrusion abuts against the delay slider when the delay slider is in the second position.

[0018] A hydraulic power unit according to an embodiment of the present invention includes a main cylinder and a main oil cylinder that are linked together. The main cylinder includes a reversing trigger device that can issue a signal that the piston of the main cylinder has moved to the correct position, and a main reversing valve that switches the intake and exhaust of the two cylinder chambers of the main cylinder according to the signal from the reversing trigger device. The hydraulic power unit also includes an auxiliary cylinder and an auxiliary oil cylinder that are linked together. The auxiliary cylinder includes an auxiliary reversing valve that can acquire the valve core reversing information of the main reversing valve and switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the acquired information. The oil supply port of the auxiliary oil cylinder is connected in parallel with the oil supply port of the main oil cylinder. The hydraulic power unit also includes a time delay valve that controls the auxiliary reversing valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the acquired information after a certain time interval following the acquisition of the valve core reversing information of the main reversing valve. The hydraulic station of this utility model controls the auxiliary directional valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder after a certain interval after obtaining the valve core switching information of the main directional valve. This delays the action of the auxiliary cylinder and the auxiliary oil cylinder, avoiding the problem of energy waste caused by the synchronous and rapid oil supply of the auxiliary oil cylinder and the main oil cylinder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a hydraulic station provided in the prior art;

[0021] Figure 2 A schematic diagram of the connection structure of the main oil cylinder, main air cylinder, reversing trigger device, main reversing valve and auxiliary exhaust valve in the hydraulic station provided for the embodiment of this utility model;

[0022] Figure 3 A schematic diagram of the connection structure of the main cylinder, main air cylinder, reversing trigger device, main reversing valve, auxiliary exhaust valve, first-stage auxiliary cylinder, first-stage auxiliary air cylinder, first-stage auxiliary reversing valve, second-stage auxiliary cylinder, second-stage auxiliary air cylinder, and second-stage auxiliary reversing valve in the hydraulic station provided for the embodiments of this utility model.

[0023] Figure 4 A schematic diagram of the structure of the auxiliary exhaust valve in the hydraulic station provided in this embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the connection structure of the delay valve in the hydraulic station provided in this embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of the delay valve when air is introduced through the first opening, as provided in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the delay valve provided in the embodiment of the present invention when air is introduced through the second opening. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] See Figures 2-4 The present invention provides a hydraulic station including a main cylinder 1 and a main oil cylinder 4. The main cylinder 1 includes a reversing trigger device 2 that can send a signal that the cylinder piston of the main cylinder has moved to the position, and a main reversing valve 3 that switches the intake and exhaust of the two cylinder chambers of the main cylinder according to the signal of the reversing trigger device.

[0029] The main cylinder 1 has a cylinder body, a first cylinder piston 101, and cylinder end caps. The first cylinder piston 101 can slide along the inner wall of the cylinder body and form an air seal with the inner wall of the cylinder body. The cylinder end caps are located at both ends of the cylinder body to seal the cylinder body. The first cylinder piston 101 has two cylinder chambers on both sides. When air enters the cylinder chamber on one side of the first cylinder piston 101, air exits the cylinder chamber on the other side, so that the first cylinder piston 101 moves back and forth between the two ends under the action of air pressure. The first cylinder piston 101 is connected to the first oil cylinder piston 401 of the main oil cylinder 4 through a first linkage rod 5. The first linkage rod 5 is slidably inserted through the cylinder end cap located in the main cylinder 1 near the main oil cylinder 4, so that the first cylinder piston 101 and the first oil cylinder piston 401 slide synchronously.

[0030] There are two reversing trigger devices 2, namely a first reversing trigger device 201 and a second reversing trigger device 202. The first reversing trigger device 201 and the second reversing trigger device 202 are respectively located at both ends of the main cylinder 1 to detect whether the first cylinder piston 101 has moved to the correct position at both ends, and to issue a corresponding position signal when the first cylinder piston 101 has moved to the correct position at both ends. The first reversing trigger device 201 and the second reversing trigger device 202 can both be mechanical valves, especially pneumatic valves. In this case, the main reversing valve is a pneumatic reversing valve.

[0031] The pneumatic control valve body, which serves as the first reversing trigger device 201, is provided with a first air inlet E and a first exhaust port C. The first air inlet E is connected to the air source 11, and the first exhaust port C is connected to the first control port Y1 of the main reversing valve 3. The pneumatic control valve body is provided with a pneumatic control valve core that can move to the left under pressure and to the right under elasticity. When the pneumatic control valve core moves to the left position, the first air inlet E and the first exhaust port C are connected. The starting block part of the pneumatic control valve core protrudes from the right end of the pneumatic control valve body and is located on the cylinder end cover on the left side of the first cylinder piston 101, and also protrudes from the cylinder cavity on the left side of the first cylinder piston 101. Under the above conditions, when the first cylinder piston 101 moves to its left position under air pressure, it triggers the actuating block of the pneumatic control valve core. The pneumatic control valve core moves to the left until the first air inlet E and the first exhaust port C are connected, thus connecting the air source 11 and the first control port Y1, thereby pressurizing the gas into the first control port Y1. During this process, the actuating block of the pneumatic control valve core is activated to determine whether the first cylinder piston 101 has moved to its left position, and a position signal is sent by pressurizing the gas into the first control port Y1.

[0032] The pneumatic control valve body, serving as the second reversing trigger device 202, is equipped with a second air inlet F and a second exhaust port D. The second air inlet F is connected to the air source 11, and the second exhaust port D is connected to the second control port Z1 of the main reversing valve 3. The pneumatic control valve body contains a valve core that can move to the right under pressure and to the left under elasticity. When the valve core moves to the right, the second air inlet F and the second exhaust port D are connected. The actuating block portion of the valve core protrudes from the left end of the pneumatic control valve body and is located on the cylinder end cover to the right of the first cylinder piston 101, and also protrudes from the cylinder cavity to the right of the first cylinder piston 101. Under these conditions, when the first cylinder piston 101 moves to the right under air pressure, it triggers the actuating block of the valve core, causing the valve core to move to the right until the second air inlet F and the second exhaust port D are connected, thus connecting the air source 11 and the second control port Z1, thereby pressurizing the gas into the second control port Z1. In the above process, by determining whether the starting block part of the pneumatic control valve core is touched, it is known whether the first cylinder piston 101 has moved to the right position, and by pressurizing the gas into the second control port Z1, a position signal is sent.

[0033] The main reversing valve 3 is connected to the first reversing trigger device 201 and the second reversing trigger device 202 respectively, so as to sequentially switch the intake and exhaust of the two cylinder chambers of the main cylinder according to the signals sent by the first reversing trigger device 201 and the second reversing trigger device 202. The main reversing valve can be a pneumatically controlled reversing valve.

[0034] The pneumatically controlled directional valve body, serving as the main directional valve 3, is equipped with a first control port Y1, a second control port Z1, a first working port A1, a second working port B1, a third air inlet P1, a third exhaust port R11, and a fourth exhaust port R12. The first control port Y1 is connected to the first exhaust port C of the first directional triggering device 201, the second control port Z1 is connected to the second exhaust port D of the second directional triggering device 202, the first working port A1 is connected to the cylinder cavity on the left side of the first cylinder piston 101, and the second working port B1 is connected to the cylinder cavity on the right side of the first cylinder piston 101. The cylinder chambers are connected, and the third air inlet P1 is connected to the air source 11. The pneumatic directional valve body contains a valve core that can move to the right under the pressure of the first control port Y1 and to the left under the pressure of the second control port Z1. When the valve core moves to the right, the first working port A1 connects to the third air inlet P1, and the second working port B1 connects to the fourth exhaust port R12. When the valve core moves to the left, the second working port B1 connects to the third air inlet P1, and the first working port A1 connects to the third exhaust port R11. Under these conditions, after the gas is pressurized into the first control port Y1, the valve core moves to the right until the first working port A1 connects to the third air inlet P1 to achieve air intake, and the second working port B1 connects to the fourth exhaust port R12 to achieve air exhaust. This allows air to enter the cylinder chamber on the left side of the first cylinder piston 101 and exhaust from the cylinder chamber on the right side, causing the first cylinder piston 101 to move to the right under the pressure. After gas is pressurized into the second control port Z1, the valve core of the pneumatic reversing valve moves to the left until the second working port B1 connects with the third air inlet port P1 to achieve air intake, and the first working port A1 connects with the third exhaust port R11 to achieve exhaust. This allows air to enter the cylinder chamber on the right side of the first cylinder piston 101 and exhaust from the cylinder chamber on the left side, causing the first cylinder piston 101 to move to the left under the action of air pressure. During the above process, the main reversing valve 3 sequentially switches the air intake and exhaust of the two cylinder chambers of the main cylinder according to the gas pressurization into the first control port Y1 and the second control port Z1.

[0035] The hydraulic cylinder may also include an auxiliary exhaust valve 6. The auxiliary exhaust valve 6 has an exhaust port and two control ports. One control port of the auxiliary exhaust valve 6 is simultaneously connected to one cylinder chamber of the main cylinder 1 and one working port of the main directional valve 3. The other control port of the auxiliary exhaust valve 6 is simultaneously connected to another cylinder chamber of the main cylinder 1 and the other working port of the main directional valve 3. When air is introduced into one cylinder chamber of the main cylinder 1, the exhaust port connects the other cylinder chamber of the main cylinder 1 to the outside. When the valve core of the main directional valve 3 is in the neutral position, the auxiliary exhaust valve 6 discharges the gas in the other cylinder chamber of the main cylinder 1, so that the piston of the main cylinder 1 can move towards the cylinder end cover of the other cylinder chamber under the action of the air pressure in one cylinder chamber, thereby triggering the reversing trigger device 2, so that the valve core of the main directional valve 3 reverses, switching to the state where air is introduced into the other cylinder chamber and air is exhausted from the first cylinder chamber.

[0036] The auxiliary exhaust valve 6 includes an auxiliary exhaust valve body 601 and an auxiliary exhaust valve core 602. The auxiliary exhaust valve body 601 is a hollow structure, and has a third control port G, a fourth control port H, and a fifth exhaust port S. The third control port G is simultaneously connected to the cylinder cavity on one side of the first cylinder piston 101 and the first working port A1 of the main reversing valve 3. The fourth control port H is simultaneously connected to the cylinder cavity on the other side of the first cylinder piston 101 and the second working port B1 of the main reversing valve 3. The fifth exhaust port S is connected to the outside. The auxiliary exhaust valve core 602 is slidably disposed within the auxiliary exhaust valve body 601. Under the action of air pressure in the third control port G, it slides to a first position, so that the third control port G is not connected to the fifth exhaust port S, and the fourth control port H is connected to the fifth exhaust port S. Under the action of air pressure in the fourth control port H, it slides to a second position, so that the third control port G is connected to the fifth exhaust port S, and the fourth control port H is not connected to the fifth exhaust port S. The third control port G and the fourth control port H are respectively located at the left and right ends of the auxiliary exhaust valve body 601. The fifth exhaust port S is located on the upper part of the auxiliary exhaust valve body 601, at the middle position of the auxiliary exhaust valve body 601. A muffler 609 is installed at the exhaust port. Under the above conditions, after air enters through the first working port A1, air enters the cylinder chamber on the left side of the first cylinder piston 101. The gas is pressurized into the third control port G, the auxiliary exhaust valve 6 moves to the right, and the fourth control port H connects with the fifth exhaust port S to achieve exhaust. The cylinder chamber on the right side of the first cylinder piston 101 exhausts through the fifth exhaust port S and the second working port B1. After air enters through the second working port B1, air enters the cylinder chamber on the right side of the first cylinder piston 101. The gas is pressurized into the fourth control port H, the auxiliary exhaust valve 6 moves to the left, and the third control port G connects with the fifth exhaust port S to achieve exhaust. The cylinder chamber on the left side of the first cylinder piston 101 exhausts through the fifth exhaust port S and the first working port A1.

[0037] The auxiliary exhaust valve body 601 is provided with a first limiting plate 603 and a second limiting plate 604. The first limiting plate 603 and the second limiting plate 604 are respectively disposed at a first position and a second position, and are connected to the inner wall of the auxiliary exhaust valve body 601, so that the first limiting plate 603 and the second limiting plate 604 slide and limit the auxiliary exhaust valve core 602. The first limiting plate 603 and the second limiting plate 604 are symmetrically arranged.

[0038] The inner wall of the auxiliary exhaust valve body 601 is provided with a protrusion 605, and a fifth exhaust port S is provided on the protrusion 605. An auxiliary exhaust valve core 602 is provided at the protrusion 605, and there is a gap between the inner wall of the protrusion 605 and the outer wall of the auxiliary exhaust valve core 602. The outer wall of the auxiliary exhaust valve core 602 is provided with a first sealing part 606 and a second sealing part 607. When the auxiliary exhaust valve core 602 slides to the first position, the first sealing part 606 is located outside the protrusion 605 and is spaced a certain distance from the inner wall of the auxiliary exhaust valve body 601. When the auxiliary exhaust valve core 602 slides to the first position, the second sealing part 607 is located inside the protrusion 605 and seals the gap between the outer wall of the auxiliary exhaust valve core 602 and the inner wall of the protrusion 605. When the auxiliary exhaust valve core 602 slides to the second position, the first sealing part 606 is located inside the protrusion 605 and seals the gap between the outer wall of the auxiliary exhaust valve core 602 and the inner wall of the protrusion 605. The auxiliary exhaust valve core 602 is positioned within the protrusion 605 and seals the gap between its outer wall and the inner wall of the protrusion 605. The second sealing part 607 is positioned outside the protrusion 605 when the auxiliary exhaust valve core 602 slides to the second position, and is spaced a certain distance from the inner wall of the auxiliary exhaust valve body 601. This ensures that when the auxiliary exhaust valve core 602 slides to the first position, the third control port G and the fifth exhaust port S are not connected, while the fourth control port H connects to the fifth exhaust port S through the gap between the outer wall of the auxiliary exhaust valve core 602 and the inner wall of the auxiliary exhaust valve body 601. When the auxiliary exhaust valve core 602 slides to the second position, the third control port G connects to the fifth exhaust port S through the gap between the outer wall of the auxiliary exhaust valve core 602 and the inner wall of the auxiliary exhaust valve body 601, while the fourth control port H does not connect to the fifth exhaust port S. The protrusion 605 is positioned around the centerline of the auxiliary exhaust valve body 601. The protrusion 605 is located at the middle position of the auxiliary exhaust valve body 601. The first sealing part 606 and the second sealing part 607 are both arranged around the center line of the auxiliary exhaust valve core 606. The first sealing part 606 and the second sealing part 607 are symmetrically arranged. Both the first sealing part 606 and the second sealing part 607 are sealing rings. The first sealing part 606 and the second sealing part 607 are both embedded in the outer wall of the auxiliary exhaust valve core 602.

[0039] A recessed portion 608 is provided on the outer wall of the auxiliary exhaust valve core 602. The recessed portion 608 is located between the first sealing portion 606 and the second sealing portion 607. When the auxiliary exhaust valve core 602 slides to the first position, one end of the recessed portion 608 near the first sealing ring 606 is located outside the protrusion 605, and the other end near the second sealing ring 607 is located inside the protrusion 605. When the auxiliary exhaust valve core 602 slides to the second position, one end near the second sealing ring 607 is located outside the protrusion 605, and the other end near the first sealing ring 606 is located outside the protrusion 605. This allows the recessed portion 608 to assist in connecting the third control port G and the fifth exhaust port S when the auxiliary exhaust valve core 602 slides to the first position; and to assist in connecting the fourth control port H and the fifth exhaust port S when the auxiliary exhaust valve core 602 slides to the second position. The recessed portion 608 is arranged around the center line of the auxiliary exhaust valve core 602. The recess 608 is located in the middle of the auxiliary exhaust valve core 602.

[0040] The hydraulic power unit may also include linked auxiliary cylinders and auxiliary oil cylinders. The auxiliary cylinder includes an auxiliary directional valve, which receives information about the main directional valve's valve core reversing position and switches the air intake and exhaust of the two cylinder chambers of the auxiliary cylinder based on this information. The oil supply port of the auxiliary oil cylinder is connected in parallel with the oil supply port of the main oil cylinder. The hydraulic power unit may also include linked primary auxiliary cylinder 7 and primary auxiliary oil cylinder 12. The primary auxiliary cylinder 7 includes a primary auxiliary directional valve 8, which receives information about the main directional valve's valve core reversing position and switches the air intake and exhaust of the two cylinder chambers of the primary auxiliary cylinder 7 based on this information. The oil supply port of the primary auxiliary oil cylinder 12 is connected in parallel with the oil supply port of the main oil cylinder 1.

[0041] The oil supply ports of the primary auxiliary cylinder 12 and the main cylinder 1 are both connected to the hydraulic valve block via check valves. Optionally, the oil supply ports of the primary auxiliary cylinder 12 and the main cylinder 1 are both connected to the pressure holding structure via check valves, and the pressure holding structure is connected to the hydraulic valve block. The oil inlets of the primary auxiliary cylinder 12 and the main cylinder 1 are both connected to the oil tank via check valves.

[0042] The structure of the first-stage auxiliary cylinder 7 is the same as that of the main cylinder 1. The connection structure between the first-stage auxiliary cylinder 7 and the first-stage auxiliary hydraulic cylinder 12 is the same as that between the main cylinder 1 and the hydraulic cylinder 4, which will not be described in detail here. Among them, the first-stage auxiliary cylinder 7 has a second cylinder piston 701, and the second cylinder piston 701 of the first-stage auxiliary cylinder 7 and the second hydraulic piston 1201 of the first-stage auxiliary hydraulic cylinder 12 are connected by a second linkage rod 13.

[0043] The structure of the first-stage auxiliary directional valve 8 is the same as that of the main directional valve 3. The connection structure between the first-stage auxiliary directional valve 8 and the first-stage auxiliary cylinder 7 is the same as that between the main directional valve 3 and the main cylinder 1, which will not be elaborated here. The first-stage auxiliary directional valve 8 can be a pneumatically controlled directional valve. The first-stage auxiliary directional valve 8 and the main directional valve 3 are supplied with air from the same air source 11. The pneumatically controlled directional valve body of the first-stage auxiliary directional valve 8 is equipped with a fifth control port Y2, a sixth control port Z2, a third working port A2, a fourth working port B2, a fourth air inlet P2, a sixth exhaust port R21, and a seventh exhaust port R22. Gas is pressurized in both the fifth control port Y2 and the sixth control port Z2. The third working port A2 is connected to the cylinder cavity on the left side of the second cylinder piston 701 of the first-stage auxiliary cylinder 7, and the fourth working port B2 is connected to the cylinder cavity on the right side of the second cylinder piston 701. The fourth air inlet... P2 is connected to the air source 11. The pneumatic reversing valve body is equipped with a pneumatic reversing valve core that can move to the right under the air pressure in the fifth control port Y2 and to the left under the air pressure in the sixth control port Z2. When the pneumatic reversing valve core moves to the right, the third working port A2 is connected to the fourth air inlet P2, and the fourth working port B2 is connected to the seventh exhaust port R22. When the pneumatic reversing valve core moves to the left, the fourth working port B2 is connected to the fourth air inlet P2, and the third working port A2 is connected to the sixth exhaust port R21.

[0044] To enable the first-stage auxiliary directional valve 8 to obtain the valve core switching position information of the main directional valve 3 and switch the air intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder 7 according to the obtained information, the two control ports of the first-stage auxiliary directional valve 8 are connected to the two working ports of the main directional valve 3 respectively. Specifically, the fifth control port Y2 is connected to the first working port A1 of the main directional valve 3 via the first pipeline, and the sixth control port Z2 is connected to the second working port B1 of the main directional valve 3 via the first pipeline. Under the above conditions, the air intake at the first working port A1 of the main directional valve 3 pressurizes the fifth control port Y2, causing the valve core of the pneumatically controlled directional valve 8 of the first-stage auxiliary directional valve to move to the right until the third working port A2 connects with the fourth intake port P2 to achieve air intake, and the fourth working port B2 connects with the seventh exhaust port R22 to achieve exhaust. This allows the cylinder chamber on the left side of the second cylinder piston 701 of the first-stage auxiliary cylinder 7 to receive air and the cylinder chamber on the right side to exhaust, causing the second cylinder piston 701 to move to the right under the action of air pressure. The second working port B1 of the main directional valve 3 pressurizes the sixth control port Z2, causing the valve core of the pneumatically controlled directional valve 8, acting as the first-stage auxiliary directional valve, to move to the left until the fourth working port B2 connects with the fourth intake port P2 to achieve air intake, and the third working port A2 connects with the sixth exhaust port R21 to achieve exhaust. This allows air to enter the cylinder chamber on the right side of the second cylinder piston 701 and exhaust from the cylinder chamber on the left side, causing the second cylinder piston 701 to move to the left under air pressure. During the above process, the first-stage auxiliary directional valve 8 obtains the valve core switching position information of the main directional valve 3 by receiving air intake from the first working port A1 and the second working port B1, and switches the air intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder 7 according to the air intake from the first working port A1 and the second working port B1.

[0045] To enable the primary auxiliary directional valve 8 to acquire the valve core switching position information of the main directional valve 3 and switch the intake and exhaust of the two cylinder chambers of the primary auxiliary cylinder 7 based on the acquired information, the two control ports of the primary auxiliary directional valve 8 are respectively connected to the two cylinder chambers of the primary auxiliary cylinder 7. Specifically: the fifth control port Y2 is connected to the cylinder chamber on the left side of the first cylinder piston 101, and the sixth control port Z2 is connected to the cylinder chamber on the right side of the first cylinder piston 101. Under the above conditions, the intake of the cylinder chamber on the left side of the first cylinder piston 101 pressurizes the fifth control port Y2, causing the valve core of the pneumatically controlled directional valve 8 to move to the right until the third working port A2 connects with the fourth intake port P2 to achieve intake, and the fourth working port B2 connects with the seventh exhaust port R22 to achieve exhaust, thereby enabling the intake of the cylinder chamber on the left side of the second cylinder piston 701 and the exhaust of the cylinder chamber on the right side, and the second cylinder piston 701 moves to the right under the action of air pressure. The cylinder chamber on the right side of the first cylinder piston 101 is pressurized by the intake air into the sixth control port Z2. This causes the valve core of the pneumatically controlled directional valve 8 (acting as the first-stage auxiliary directional valve 8) to move to the left until the fourth working port B2 connects with the fourth intake port P2, achieving intake. Simultaneously, the third working port A2 connects with the sixth exhaust port R21, achieving exhaust. This results in the intake air into the cylinder chamber on the right side of the second cylinder piston 701 and the exhaust air into the cylinder chamber on the left side. The second cylinder piston 701 then moves to the left under the pressure of the air. During this process, the first-stage auxiliary directional valve 8 receives the intake air from the left and right cylinder chambers of the first cylinder piston 101 to obtain the valve core switching information of the main directional valve 3, and switches the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder 7 according to the intake air from the left and right cylinder chambers of the first cylinder piston 101.

[0046] To enable the primary auxiliary directional valve 8 to acquire the valve core switching position information of the main directional valve 3 and switch the intake and exhaust of the two cylinder chambers of the primary auxiliary cylinder 7 based on the acquired information, the two control ports of the primary auxiliary directional valve 8 are connected to the two control ports of the auxiliary exhaust valve 6, respectively. Specifically, the fifth control port Y2 is connected to the third control port G of the auxiliary exhaust valve 6, and the sixth control port Z2 is connected to the fourth control port H of the auxiliary exhaust valve 6. Under the above conditions, the intake air at the third control port G pressurizes the fifth control port Y2, causing the valve core of the pneumatically controlled directional valve 8 to move to the right until the third working port A2 connects with the fourth intake port P2 to achieve intake, and the fourth working port B2 connects with the seventh exhaust port R22 to achieve exhaust. This allows the cylinder chamber on the left side of the second cylinder piston 701 of the primary auxiliary cylinder 7 to receive intake air and the cylinder chamber on the right side to exhaust air, causing the second cylinder piston 701 to move to the right under the action of air pressure. The fourth control port H pressurizes the sixth control port Z2, causing the pneumatically controlled directional valve spool of the first-stage auxiliary directional valve 8 to move to the left until the fourth working port B2 connects with the fourth intake port P2 to achieve air intake, and the third working port A2 connects with the sixth exhaust port R21 to achieve exhaust. This allows air to enter the cylinder chamber on the right side of the second cylinder piston 701 and exhaust from the cylinder chamber on the left side, causing the second cylinder piston 701 to move to the left under air pressure. During the above process, the first-stage auxiliary directional valve 8 obtains the valve spool switching information of the main directional valve 3 by receiving air intake from the third control port G and the fourth control port H, and switches the air intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder 7 according to the air intake from the third control port G and the fourth control port H.

[0047] Preferably, one control port of the first-stage auxiliary directional valve 8 is simultaneously connected to one working port of the main directional valve 3, one cylinder chamber of the main cylinder 1, and one control port of the auxiliary exhaust valve 6; the other control port of the first-stage auxiliary directional valve 8 is simultaneously connected to another working port of the main directional valve 3, another cylinder chamber of the main cylinder 1, and another control port of the auxiliary exhaust valve 6. Specifically, the fifth control port Y2 of the first-stage auxiliary directional valve 8 is simultaneously connected to the first working port A1 of the main directional valve 3, the cylinder chamber to the left of the first cylinder piston 101, and the third control port G of the auxiliary exhaust valve 6; the sixth control port Z2 of the first-stage auxiliary directional valve 8 is simultaneously connected to the second working port B1 of the main directional valve 3, the cylinder chamber to the right of the first cylinder piston 101, and the fourth control port H of the auxiliary exhaust valve 6.

[0048] The linked auxiliary cylinders and auxiliary hydraulic cylinders can be at least two stages. The oil supply ports of each stage of the auxiliary hydraulic cylinder are connected in parallel with the oil supply port of the main hydraulic cylinder 4. Each stage of the auxiliary cylinder includes an auxiliary directional valve. The auxiliary directional valve of the first-stage auxiliary cylinder can obtain the valve core reversing information of the main directional valve 3 and switch the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder according to the obtained information. The auxiliary directional valve of a non-first-stage auxiliary cylinder can obtain the valve core reversing information of the auxiliary directional valve of the previous stage auxiliary cylinder and switch the intake and exhaust of the two cylinder chambers of that stage auxiliary cylinder according to the obtained information. It should be noted that the stroke difference between the main cylinder 1 and the first-stage auxiliary cylinder is controlled within a certain range, and the first-stage auxiliary cylinder begins to reverse after the main cylinder 1 begins to reverse; the stroke difference between two adjacent stages of auxiliary cylinders is controlled within a certain range, and the next stage of auxiliary cylinder begins to reverse after the previous stage of auxiliary cylinder in the adjacent two stages begins to reverse. The above configuration ensures that the strokes of the main cylinder 11 and each stage of the auxiliary cylinders are basically the same, and that the reversing of the main cylinder 11 and each stage of the auxiliary cylinders is coordinated and smooth.

[0049] The hydraulic power unit may also include a linked secondary auxiliary cylinder 9 and a secondary auxiliary oil cylinder 14. The secondary auxiliary cylinder 9 includes a secondary auxiliary directional valve 10, which receives information about the valve core of the primary auxiliary directional valve 8 and switches the intake and exhaust of the two cylinder chambers of the secondary auxiliary cylinder 9 based on this information. The oil supply port of the secondary auxiliary oil cylinder 14 is connected in parallel with the oil supply port of the primary auxiliary oil cylinder 12.

[0050] The oil supply ports of both the secondary auxiliary cylinder 14 and the primary auxiliary cylinder 12 are connected to the hydraulic valve block via check valves. Optionally, the oil supply ports of both the secondary auxiliary cylinder 14 and the primary auxiliary cylinder 12 are connected to the pressure holding structure via check valves, and the pressure holding structure is connected to the hydraulic valve block. The oil inlets of both the secondary auxiliary cylinder 14 and the primary auxiliary cylinder 12 are connected to the oil tank via check valves.

[0051] The structure of the secondary auxiliary cylinder 9 is the same as that of the main cylinder 1. The connection structure between the secondary auxiliary cylinder 9 and the secondary auxiliary hydraulic cylinder 14 is the same as that between the main cylinder 1 and the hydraulic cylinder 4, which will not be described in detail here. Among them, the secondary auxiliary cylinder 9 has a third cylinder piston 901, and the third cylinder piston 901 of the secondary auxiliary cylinder 9 and the hydraulic cylinder piston 1401 of the secondary auxiliary hydraulic cylinder 14 are connected by a third linkage rod 15.

[0052] The structure of the secondary auxiliary directional valve 10 is the same as that of the main directional valve 3. The connection structure between the secondary auxiliary directional valve 10 and the secondary auxiliary cylinder 9 is the same as that between the main directional valve 3 and the main cylinder 1, which will not be described in detail here. The secondary auxiliary directional valve 10 can be a pneumatically controlled directional valve. The secondary auxiliary directional valve 10, the primary auxiliary directional valve 8, and the main directional valve 3 are supplied with air from the same air source 11. The pneumatically controlled directional valve body of the secondary auxiliary directional valve 10 is equipped with a seventh control port Y3, an eighth control port Z3, a fifth working port A3, a sixth working port B3, a fifth air inlet P3, an eighth exhaust port R31, and a ninth exhaust port R32. Gas is pressurized in both the seventh control port Y3 and the eighth control port Z3. The fifth working port A3 is connected to the cylinder cavity on the left side of the third cylinder piston 901 of the secondary auxiliary cylinder 9, and the sixth working port B3 is connected to the cylinder cavity on the right side of the third cylinder piston 901. The fifth air inlet P3 is connected to the cylinder cavity on the right side of the third cylinder piston 901. Port P3 is connected to air source 11. The pneumatic reversing valve body is equipped with a pneumatic reversing valve core that can move to the right under the air pressure in the seventh control port Y3 and to the left under the air pressure in the eighth control port Z3. When the pneumatic reversing valve core moves to the right, the fifth working port A3 is connected to the fifth air inlet P3, and the sixth working port B3 is connected to the ninth exhaust port R32. When the pneumatic reversing valve core moves to the left, the sixth working port B3 is connected to the fifth air inlet P3, and the fifth working port A3 is connected to the eighth exhaust port R31.

[0053] To enable the secondary auxiliary directional valve 10 to acquire the movement and positioning information of the valve core of the primary auxiliary directional valve 8, and to switch the intake and exhaust of the two cylinder chambers of the secondary auxiliary cylinder 9 based on the acquired information, the two control ports of the secondary auxiliary directional valve 10 are respectively connected to the two working ports of the primary auxiliary directional valve 8. Specifically: the seventh control port Y3 is connected to the third working port A2 of the primary auxiliary directional valve 8 via the second pipeline, and the eighth control port Z3 is connected to the fourth working port B2 of the primary auxiliary directional valve 8 via the second pipeline. Under the above conditions, the third working port A2 of the first-stage auxiliary directional valve 8 pressurizes the seventh control port Y3, causing the valve core of the pneumatic directional valve 10 of the second-stage auxiliary directional valve to move to the right until the fifth working port A3 connects with the fifth air inlet P3 to achieve air intake, and the sixth working port B3 connects with the ninth exhaust port R32 to achieve exhaust. This causes the cylinder chamber on the left side of the piston 901 of the third cylinder of the second-stage auxiliary cylinder 9 to take in air and the cylinder chamber on the right side to exhaust air, and the piston 901 of the third cylinder moves to the right under the action of air pressure. The fourth working port B2 of the first-stage auxiliary directional valve 8 pressurizes the eighth control port Z3, causing the valve core of the pneumatically controlled directional valve 10 of the second-stage auxiliary directional valve to move to the left until the sixth working port B3 connects with the fifth intake port P3 to achieve air intake, and the fifth working port A3 connects with the eighth exhaust port R31 to achieve air exhaust. This allows air to enter the cylinder chamber on the right side of the third cylinder piston 901 and exhaust from the cylinder chamber on the left side, causing the third cylinder piston 901 to move to the left under air pressure. During the above process, the second-stage auxiliary directional valve 10 obtains the valve core switching information of the first-stage auxiliary directional valve 8 by receiving air intake from the third working port A2 and the fourth working port B2, and switches the air intake and exhaust of the two cylinder chambers of the second-stage auxiliary cylinder 9 according to the air intake from the third working port A2 and the fourth working port B2.

[0054] To enable the secondary auxiliary directional valve 10 to acquire the positioning information of the valve core of the primary auxiliary directional valve 8 and switch the intake and exhaust of the two cylinder chambers of the secondary auxiliary cylinder 9 based on the acquired information, the two control ports of the secondary auxiliary directional valve 10 are respectively connected to the two cylinder chambers of the primary auxiliary cylinder 7. Specifically: the seventh control port Y3 is connected to the cylinder chamber on the left side of the second cylinder piston 701 of the primary auxiliary cylinder 7, and the eighth control port Z3 is connected to the cylinder chamber on the right side of the second cylinder piston 701. Under the above conditions, the intake of the cylinder chamber on the left side of the second cylinder piston 701 pressurizes the seventh control port Y3, causing the pneumatically controlled directional valve core of the secondary auxiliary directional valve 10 to move to the right until the fifth working port A3 connects with the fifth intake port P3 to achieve intake, and the sixth working port B3 connects with the ninth exhaust port R32 to achieve exhaust, thereby enabling the intake of the cylinder chamber on the left side of the third cylinder piston 901 and the exhaust of the cylinder chamber on the right side, and the third cylinder piston 901 moves to the right under the action of air pressure. The cylinder chamber on the right side of the second cylinder piston 701 pressurizes the eighth control port Z3, causing the valve core of the pneumatically controlled directional valve 10, acting as the secondary auxiliary directional valve, to move to the left until the sixth working port B3 connects with the fifth intake port P3 to achieve air intake, and the fifth working port A3 connects with the eighth exhaust port R31 to achieve air exhaust. This allows air to enter the cylinder chamber on the right side of the third cylinder piston 901 and exhaust from the cylinder chamber on the left side, causing the third cylinder piston 901 to move to the left under air pressure. During the above process, the secondary auxiliary directional valve 10 obtains the valve core switching information of the primary auxiliary directional valve 8 by receiving air intake from the left and right cylinder chambers of the second cylinder piston 701, and switches the air intake and exhaust of the two cylinder chambers of the secondary auxiliary cylinder 9 according to the air intake from the left and right cylinder chambers of the second cylinder piston 701.

[0055] Preferably, one control port of the secondary auxiliary directional valve 10 is simultaneously connected to one working port of the primary auxiliary directional valve 8 and one cylinder chamber of the primary auxiliary cylinder 7; the other control port of the secondary auxiliary directional valve 10 is simultaneously connected to another working port of the primary auxiliary directional valve 8 and another cylinder chamber of the primary auxiliary cylinder 7. Specifically, the seventh control port Y3 of the secondary auxiliary directional valve 10 is simultaneously connected to the third working port A2 of the primary auxiliary directional valve 8 and the cylinder chamber on the left side of the second cylinder piston 701 of the primary auxiliary cylinder 7; the eighth control port Z3 of the secondary auxiliary directional valve 10 is simultaneously connected to the fourth working port B2 of the primary auxiliary directional valve 8 and the cylinder chamber on the right side of the second cylinder piston 701 of the primary auxiliary cylinder 7.

[0056] In summary, the hydraulic station of this utility model, by setting a primary auxiliary cylinder 7 and a primary auxiliary oil cylinder 12, and by setting the primary auxiliary cylinder 7 to include a primary auxiliary directional valve 8, enables the primary auxiliary cylinder 7 to drive the primary auxiliary oil cylinder 12 to supply oil when the oil supply of the main oil cylinder 4 stops during the reversing process of the main cylinder 1 driving the main oil cylinder 4, so as to achieve continuous oil supply.

[0057] The hydraulic station of this utility model is equipped with a secondary auxiliary cylinder 9 and a secondary auxiliary oil cylinder 14. The secondary auxiliary cylinder 9 includes a secondary auxiliary directional valve 10. When the oil supply of the primary auxiliary oil cylinder 12 stops during the reversing process of the primary auxiliary cylinder 7 driving the primary auxiliary oil cylinder 12, the secondary auxiliary directional valve 10 controls the secondary auxiliary cylinder 9 to drive the secondary auxiliary oil cylinder 14 to supply oil according to the valve core reversing information of the primary auxiliary directional valve 8, thereby achieving continuous oil supply.

[0058] See Figures 5-7 The hydraulic station also includes a time-delay valve 16. The time-delay valve 16 controls the auxiliary directional valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder after a certain time interval following the acquisition of the valve core switching information of the main directional valve 3. Specifically, the time-delay valve 16 controls the first-stage auxiliary directional valve 8 to switch the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder 7 after a certain time interval following the acquisition of the valve core switching information of the main directional valve 3, and controls the second-stage auxiliary directional valve 10 to switch the intake and exhaust of the two cylinder chambers of the second-stage auxiliary cylinder 9 after a certain time interval following the acquisition of the valve core switching information of the first-stage auxiliary directional valve 8.

[0059] A time-delay valve 16 is installed on the first pipeline and controls the flow rate of gas in the first pipeline to decrease when flowing towards the primary auxiliary directional valve 8. The time-delay valve 16 also controls the flow rate of gas in the first pipeline to increase when flowing towards the main directional valve 3. The time-delay valve 16 is also installed on the second pipeline and controls the flow rate of gas in the first pipeline to decrease when flowing towards the secondary auxiliary directional valve 10. Finally, the time-delay valve 16 controls the flow rate of gas in the second pipeline to increase when flowing towards the primary auxiliary directional valve 8.

[0060] The delay valve 16 includes a delay valve body 1601, a delay valve block 1602, and a delay slider 1603.

[0061] The delay valve body 1601 is provided with a delay channel 1604, which has a first opening 1605 and a second opening 1606. Both the first opening 1605 and the second opening 1606 are connected to a first pipeline or a second pipeline. Specifically, when both the first opening 1605 and the second opening 1606 are connected to the first pipeline, the first opening 1605 of one delay valve 16 is connected to the first working port A1 of the main directional valve 3, and the second opening 1606 is connected to the fifth control port Y2 of the first-stage auxiliary directional valve 8. The first opening 1605 of another delay valve 16 is connected to the second working port B1 of the main directional valve 3, and the second opening 1606 is connected to the sixth control port Z2 of the first-stage auxiliary directional valve 8. When both the first opening 1605 and the second opening 1606 are connected to the second pipeline, the first opening 1605 of one delay valve 16 is connected to the third working port A2 of the first-stage auxiliary directional valve 8, and the second opening 1606 is connected to the seventh control port Y3 of the second-stage auxiliary directional valve 10. The first opening 1605 of another delay valve 16 is connected to the fourth working port B2 of the first-stage auxiliary directional valve 8, and the second opening 1606 is connected to the eighth control port Z3 of the second-stage auxiliary directional valve 10.

[0062] The delay valve block 1602 is installed in the delay channel 1604.

[0063] The delay slider 1603 is slidably disposed within the delay channel 1604 and connected to the inner wall of the delay channel 1604 via the spring 1607. When air enters through the first opening 1605, the delay slider 1603 is pushed by the spring 1607 to slide to the first position within the delay channel 1604 and cooperates with the delay valve block 1602 to form a first gap for the air to enter through the first opening 1605. When air enters through the second opening 1606, the compression spring 1607 slides to the second position within the delay channel 1604 and cooperates with the delay valve block 1602 to form a second gap for the air to enter through the second opening 1606. The first gap is smaller than the second gap.

[0064] The delay slider 1603 is provided with an air hole 1608, the two ends of which are connected to the first opening 1605 and the second opening 1606, respectively. The outer wall of the delay valve block 1602 is provided with a conical part 1609, the center line of which coincides with the center line of the air hole 1608, and the conical part 1609 is inserted into the air hole 1608. The outer peripheral wall of the conical part 1609 has a first annular surface and a second annular surface. The second annular surface is located on the side of the first annular surface away from the end of the conical part 1609. When the delay slider 1603 is in the first position, the first annular surface cooperates with the inner peripheral wall of the air hole 1608 to form a first gap. When the delay slider 1603 is in the second position, the second annular surface cooperates with the inner peripheral wall of the air hole 1608 to form a second gap.

[0065] The delay channel 1604 has a first opening 1605 at one end and a third opening 2010 at the other end, and a second opening 1606 on its side. The delay slider 1603 is sealed to the inner peripheral wall of the delay channel 1604 located between the first opening 1605 and the second opening 1606. The delay valve block 1602 is sealed to the inner peripheral wall of the delay channel 1604 located between the third opening 2010 and the second opening 1606.

[0066] The delay slider 1603 is provided with a first sealing ring 1611, which is in sealing contact with the inner peripheral wall of the delay channel 1604.

[0067] The delay valve block 1602 is provided with a second sealing ring 1612, which is in sealing contact with the inner peripheral wall of the delay channel 1604.

[0068] The inner peripheral wall of the delay channel 1604 is provided with a first protrusion 1613, which is connected to the delay slider 1603 via a spring 1607.

[0069] The inner peripheral wall of the delay channel 1604 is provided with a second protrusion 1614, which abuts against the delay slider 1603 when the delay slider 1603 is in the second position.

[0070] The time-delay valve body 1601 includes a main body 1615, a first end cap 1616, and a second end cap 1617. The main body 1615 has a hollow portion, and a first opening is provided on the side of the hollow portion. The first end cap 1616 is sealed to the first end of the hollow portion, and has a second opening communicating with the hollow portion. The second end cap 1617 is sealed to the second end of the hollow portion, and has a third opening communicating with the hollow portion. The hollow portion, the second opening, and the third opening constitute a time-delay channel.

[0071] A third sealing ring 1618 is provided on the side of the first end cap 1616 facing the hollow part, and the third sealing ring 1618 is in sealing contact with the end face of the hollow part. The first end cap 1616 is installed on the main body 1615 by a first screw 1619.

[0072] The second end cap 1617 has a fourth sealing ring 1620 on the side facing the hollow part, and the fourth sealing ring 1620 is in sealing contact with the end face of the hollow part. The second end cap 1617 is installed on the main body 1615 by a second screw 1621.

[0073] The hydraulic station of this utility model controls the auxiliary directional valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder after a certain interval after obtaining the valve core switching information of the main directional valve 3, by setting a delay valve 16. This delays the action of the auxiliary cylinder and the auxiliary oil cylinder, avoiding the problem of energy waste caused by the synchronous and rapid oil supply of the auxiliary oil cylinder and the main oil cylinder.

[0074] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic station, comprising a main cylinder and a main oil cylinder linked together; the main cylinder includes a reversing trigger device capable of issuing a signal indicating that the piston of the main cylinder has moved to the correct position, and a main reversing valve that switches the intake and exhaust of the two cylinder chambers of the main cylinder according to the signal from the reversing trigger device; further comprising an auxiliary cylinder and an auxiliary oil cylinder linked together; the auxiliary cylinder includes an auxiliary reversing valve, the auxiliary reversing valve being capable of acquiring information indicating that the valve core of the main reversing valve has reversed to the correct position, and switching the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the acquired information; the oil supply port of the auxiliary oil cylinder is connected in parallel with the oil supply port of the main oil cylinder; characterized in that, It also includes a delay valve, which controls the auxiliary reversing valve to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder according to the information obtained after a certain time interval after obtaining the valve core reversing information of the main reversing valve.

2. The hydraulic station as described in claim 1, characterized in that, The two control ports of the auxiliary reversing valve are respectively connected to the two working ports of the main reversing valve via the first pipeline; The delay valve is installed on the first pipeline and controls the flow rate of gas in the first pipeline to decrease when it flows to the auxiliary reversing valve.

3. The hydraulic station as described in claim 2, characterized in that, The delay valve controls the gas flow rate in the first pipeline to increase when it flows toward the main reversing valve.

4. The hydraulic station as described in claim 1, characterized in that, The linkage of auxiliary cylinders and auxiliary hydraulic cylinders consists of at least two stages; the oil supply port of each stage of the auxiliary hydraulic cylinder is connected in parallel with the oil supply port of the main hydraulic cylinder; Each stage of the auxiliary cylinder includes an auxiliary reversing valve. The auxiliary reversing valve of the first-stage auxiliary cylinder can obtain the valve core reversing position information of the main reversing valve and switch the air intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder according to the obtained information. The auxiliary reversing valve of the non-first-stage auxiliary cylinder can obtain the valve core reversing position information of the auxiliary reversing valve of the previous stage auxiliary cylinder and switch the air intake and exhaust of the two cylinder chambers of the current stage auxiliary cylinder according to the obtained information. The delay valve controls the auxiliary directional valve of the first-stage auxiliary cylinder to switch the intake and exhaust of the two cylinder chambers of the first-stage auxiliary cylinder after a certain interval after obtaining the valve core switching information of the main directional valve. It also controls the auxiliary directional valve of the non-first-stage auxiliary cylinder to switch the intake and exhaust of the two cylinder chambers of the auxiliary cylinder of that stage after a certain interval after obtaining the valve core switching information of the auxiliary directional valve of the previous stage auxiliary cylinder.

5. The hydraulic station as described in claim 4, characterized in that, The two control ports of the auxiliary reversing valve of the auxiliary cylinder not described in the first stage are respectively connected to the two working ports of the auxiliary reversing valve of the auxiliary cylinder described in the previous stage via the second pipeline. The delay valve is installed on the second pipeline and controls the flow rate of gas in the second pipeline to decrease when it flows to the auxiliary reversing valve of the non-first-stage auxiliary cylinder.

6. The hydraulic station as described in claim 5, characterized in that, The delay valve controls the gas in the second pipeline to increase the flow rate when it flows to the auxiliary reversing valve of the upper-level auxiliary cylinder.

7. The hydraulic station as described in claim 2, characterized in that, The delay valve includes: The delay valve body is provided with a delay channel, and the delay channel is provided with a first opening and a second opening, both of which are connected to the first pipeline or the second pipeline; The delay valve block is disposed within the delay channel; A delay slider is slidably disposed within the delay channel and connected to the inner wall of the delay channel via a spring. When air enters through the first opening, the delay slider is pushed by the spring to a first position within the delay channel and cooperates with the delay valve block to form a first gap for air to pass through the first opening. When air enters through the second opening, the spring is compressed and the slider slides to a second position within the delay channel and cooperates with the delay valve block to form a second gap for air to pass through the second opening. The first gap is smaller than the second gap.

8. The hydraulic station as described in claim 7, characterized in that, The delay slider is provided with air holes, and the two ends of the air holes are respectively connected to the first opening and the second opening; The outer wall of the delay valve block is provided with a conical portion, the center line of the conical portion coincides with the center line of the air hole, and the conical portion is inserted into the air hole. The outer peripheral wall of the conical portion has a first annular surface and a second annular surface. The second annular surface is located on the side of the first annular surface away from the end of the conical portion. When the delay slider is in the first position, the first annular surface cooperates with the inner peripheral wall of the air hole to form the first gap. When the delay slider is in the second position, the second annular surface cooperates with the inner peripheral wall of the air hole to form the second gap.

9. The hydraulic station as described in claim 8, characterized in that, The delay channel has a first opening at one end and a third opening at the other end, and a second opening at the side of the delay channel; The delay slider is sealed to the inner peripheral wall of the delay channel located between the first opening and the second opening; The delay valve block is sealed to the inner peripheral wall of the delay channel located between the third opening and the second opening.

10. The hydraulic station as described in claim 9, characterized in that, The inner peripheral wall of the delay channel is provided with a first protrusion, and the first protrusion is connected to the delay slider via the spring; The inner peripheral wall of the delay channel is provided with a second protrusion, which abuts against the delay slider when the delay slider is in the second position.

Images