Energy-saving hydraulic station

Abstract

The utility model provides an energy-saving hydraulic station. The energy-saving hydraulic station comprises a gas-liquid booster pump and a control valve group for controlling the gas-liquid booster pump to reverse, a first control channel is formed from the first pneumatic control valve to a control cavity corresponding to a first control port Y of the pneumatic control reversing valve; a first unloading channel is arranged on the first control channel; a second control channel is formed from the second pneumatic control valve to a control cavity corresponding to a second control port Z of the pneumatic control reversing valve; and a second unloading channel is arranged on the second control channel. According to the pneumatic control reversing valve, the load of the first control channel is unloaded through the first unloading channel communicated with the first control channel, and the reversing resistance of the pneumatic control reversing valve is reduced; through a second unloading channel communicated with the second control channel, the load of the second control channel is unloaded, and the sliding resistance of a valve element of the pneumatic control reversing valve into a control cavity corresponding to a second control port Z is reduced, so that the pneumatic control reversing valve is prevented from being clamped and stopped in the reversing process, and the situation that the pneumatic control reversing valve stops in the middle position is avoided.

Description

Technical Field

[0001] The utility model relates to a hydraulic station, in particular to an intermittently working hydraulic station. Background Art

[0002] A hydraulic station 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] Chinese utility model patent specification CN219081986 discloses an energy-saving hydraulic station, such as Figure 1 As shown, it includes: an oil tank 1', a gas-liquid booster pump and an electromagnetic valve group 6'; the liquid outlet of the oil tank 1' is connected to the liquid inlet of the gas-liquid booster pump; the liquid outlet of the gas-liquid booster pump is connected to the liquid inlet of the electromagnetic valve group 6'; the liquid return port of the electromagnetic valve group 6' is connected to the liquid inlet of the oil tank 1'; the gas-liquid booster pump includes: a pneumatic cylinder 10' and an oil cylinder 11'; the pneumatic cylinder 10' and the oil cylinder 11' are connected; a pneumatic piston in contact with the inner wall is provided in the pneumatic cylinder 10', and an oil cylinder piston in contact with the inner wall is provided in the oil cylinder 11'; the piston area of ​​the pneumatic piston is larger than the piston area of ​​the oil cylinder piston; it also includes an air supply device, including: an air source, a first air control valve 27', a second air control valve 28' and an air control reversing valve 29'; the first A pneumatic control valve 27' is arranged on one side of the pneumatic cylinder 10, and the second pneumatic control valve 28 is arranged on the other side of the pneumatic cylinder 10'; the air source is connected to the air inlets of the first pneumatic control valve 27', the second pneumatic control valve 28' and the pneumatic control reversing valve 29' respectively; the pneumatic control reversing valve 28' comprises: an A' outlet and a B' outlet; the A' outlet is connected to one side of the pneumatic cylinder 10', and the B' outlet is connected to the other side of the pneumatic cylinder 10'; the first pneumatic control valve 27' is connected to the pneumatic control reversing valve 29' through the first air source circuit 30' to control the pneumatic control reversing valve 29' to start the A' outlet; the second pneumatic control valve 28' is connected to the pneumatic control reversing valve 29' through the second air source circuit 31' to control the pneumatic control reversing valve 29' to start the B' outlet.

[0004] The working process of the above-mentioned energy-saving hydraulic station is as follows: the pneumatic piston is located on the left side of the pneumatic cylinder 10', triggering the first pneumatic control valve 27' to open, and the first air source circuit 30' pushes the pneumatic control reversing valve 29'. The compressed air enters the pneumatic cylinder 10' from the A' outlet port, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to the right (the first pneumatic control valve 27' is reset and cut off), driving the cylinder pistons in the oil cylinders 11' on both sides to move to the right, and a negative pressure is formed in the oil cylinder 11' on the left side, and the hydraulic oil is sucked from the oil tank 1', and enters the oil cylinder 11' through the oil inlet pipeline, liquid inlet check valve and liquid inlet and outlet plate connected thereto; the hydraulic oil in the oil cylinder 11' on the right side is output to the solenoid valve group through its inlet and outlet plate, liquid outlet check valve and oil outlet pipeline; the pneumatic piston moves to the right side of the pneumatic cylinder 10', triggering the second pneumatic control valve 28' to open, and the second air source circuit 31' pushes the pneumatic control The reversing valve 29', the compressed air enters the pneumatic cylinder 10' from the B' outlet, and enters the space on the right side of the pneumatic piston, thereby pushing the pneumatic piston to move leftward (the second pneumatic control valve 28' is reset and cut off), driving the cylinder pistons in the oil cylinders 11' on both sides to move leftward, and a negative pressure is formed in the oil cylinder 11' on the right side, and the hydraulic oil is sucked from the oil tank 1', and enters the oil cylinder 11' through the oil inlet pipeline, liquid inlet check valve and liquid inlet and outlet plate connected to it; the hydraulic oil in the oil cylinder 11' on the left side is output to the solenoid valve group through its inlet and outlet plate, liquid outlet check valve and oil outlet pipeline; the pneumatic cylinder 10' reciprocates to form a continuous hydraulic output. When the set pressure is reached, the pneumatic cylinder 10' stops moving to keep the pressure constant. The pneumatic cylinder 10' remains in a pressurized state and stops moving, thereby no longer consuming compressed air. Compared with traditional hydraulic stations, it reduces energy consumption and heat generation, thereby achieving energy saving.

[0005] In the factory environment, the above energy-saving hydraulic station has unstable air source pressure due to other air-using units (air blow guns, etc.) on the air line. During the operation of the hydraulic station, when it reaches the left or right reversing point, the gas-liquid booster pump stops and maintains pressure at this position because the tooling is just clamped in place. At this time, it is just at the reversing point, and the reversing valve core has not been pushed into place. The air supply pressure becomes low at this time, and the pneumatic cylinder piston retreats a little, causing the reversing valve core to stop in the middle position, that is, the A' and B' outlets of the air-controlled reversing valve are not connected to the air source, and the air intake at both ends of the cylinder is interrupted. The gas-liquid booster pump stops and no longer outputs hydraulic pressure. The hydraulic station will be stuck, and the tooling will lose pressure, resulting in the workpiece not being clamped tightly, hitting the tool, and other problems. Even if an energy storage tank is used, when the tooling uses hydraulic pressure again, after the pressure in the accumulator behind the hydraulic one-way valve is released, the tooling will still lose pressure, resulting in the workpiece not being clamped tightly, hitting the tool, and other problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an energy-saving hydraulic station which will not be stuck.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] The utility model proposes an energy-saving hydraulic station, which includes: a gas-liquid booster pump and a control valve group that controls the reversing of the gas-liquid booster pump; the gas-liquid booster pump includes a linked pneumatic cylinder and an oil cylinder; the control valve group includes a gas-controlled reversing valve, a first gas-controlled valve and a second gas-controlled valve that are arranged at both ends of the pneumatic cylinder and are respectively triggered and opened by the cylinder piston; the first air inlet P of the gas-controlled reversing valve, the second air inlet E of the first gas-controlled valve, and the third air inlet F of the second gas-controlled valve are respectively connected to the air source; the gas-controlled reversing valve includes a first control port Y and a second control port Z, a first air outlet A and a second air outlet B that are respectively connected to the cylinder cavity on both sides of the cylinder piston; the third air outlet C of the first gas-controlled valve is connected to the first control port Y, and the first gas-controlled valve is triggered and opened by the cylinder piston to control the gas-controlled reversing valve. The air-controlled reversing valve connects the first air outlet A with the first air inlet P; the fourth air outlet D of the second air-controlled valve is connected with the second control port Z. After the second air-controlled valve is triggered and opened by the cylinder piston, it controls the air-controlled reversing valve to connect the second air outlet B with the first air inlet P; the control cavity corresponding to the first control port Y of the air-controlled reversing valve from the first air-controlled valve forms a first control channel; a first unloading channel is provided on the first control channel, and the load of the first control channel is unloaded after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P; the control cavity corresponding to the second air-controlled valve from the second air-controlled valve to the second control port Z of the air-controlled reversing valve forms a second control channel; a second unloading channel is provided on the second control channel, and the load of the second control channel is unloaded after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P.

[0009] Furthermore, in the above energy-saving hydraulic station, the first unloading channel is arranged on the valve body of the air-controlled reversing valve, and after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside world.

[0010] Furthermore, in the above-mentioned energy-saving hydraulic station, the second unloading channel is arranged on the valve body of the air-controlled reversing valve, and after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the second unloading channel connects the control chamber corresponding to the second control port Z with the outside world.

[0011] Furthermore, in the above energy-saving hydraulic station, the first unloading channel is arranged on the valve core of the air-controlled reversing valve, and after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside world.

[0012] Furthermore, in the above-mentioned energy-saving hydraulic station, the second unloading channel is arranged on the valve core of the air-controlled reversing valve, and after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the second unloading channel connects the control chamber corresponding to the second control port Z with the outside world.

[0013] Furthermore, in the above-mentioned energy-saving hydraulic station, a valve core reset spring is provided between the valve body of the first air-controlled valve and the valve core of the first air-controlled valve, so that after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the cylinder piston can move in the direction away from the first air-controlled valve to release the triggering and opening of the first air-controlled valve. The valve core of the first air-controlled valve is reset under the reset force of the valve core reset spring, thereby cutting off the connection between the third air outlet C and the second air inlet E.

[0014] Furthermore, in the above-mentioned energy-saving hydraulic station, a relief port for connecting to the outside is provided on the valve body of the first air-controlled valve, and the first relief channel is arranged on the valve core of the first air-controlled valve. After the valve core of the first air-controlled valve is reset, the first relief channel connects the third air outlet C with the relief port to connect the first control channel with the outside.

[0015] Furthermore, in the above-mentioned energy-saving hydraulic station, a valve core reset spring is provided between the valve body of the second air-controlled valve and the valve core of the second air-controlled valve, so that after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the cylinder piston can move in the direction away from the second air-controlled valve to release the triggering and opening of the second air-controlled valve. The valve core of the second air-controlled valve is reset under the reset force of the valve core reset spring, thereby cutting off the connection between the fourth air outlet D and the third air inlet F.

[0016] Furthermore, in the above-mentioned energy-saving hydraulic station, the valve body of the second air-controlled valve is provided with a unloading port U for connecting to the outside world, and the second unloading channel is arranged on the valve core of the second air-controlled valve. After the valve core of the second air-controlled valve is reset, the second unloading channel connects the fourth air outlet D with the unloading port F to connect the second control channel with the outside world.

[0017] Furthermore, in the above-mentioned energy-saving hydraulic station, a position core shaft is respectively provided at the two end positions of the cylinder piston on the valve body of the pneumatic cylinder, and the two position core shafts are both slidably arranged on the valve body of the pneumatic cylinder along the movement direction of the cylinder piston, and the two position core shafts respectively correspond to the first air-controlled valve and the second air-controlled valve, and are used to push the corresponding position core shaft to slide with the cylinder piston when the cylinder piston slides to its end position, thereby pushing the starting block of the first air-controlled valve or the second air-controlled valve to move synchronously, thereby driving the valve core of the first air-controlled valve or the second air-controlled valve to slide, thereby realizing the triggering and opening of the first air-controlled valve or the second air-controlled valve.

[0018] The energy-saving hydraulic station provided by the utility model has a first unloading channel connected to the first control channel, and unloads the load of the first control channel when the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, and then unloads the load in the control cavity corresponding to the first control port Y, so that when the air-controlled reversing valve is switched from the state in which the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P to the state in which the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the resistance of the valve core of the air-controlled reversing valve to sliding into the control cavity corresponding to the first control port Y can be reduced, thereby avoiding the air-controlled reversing valve from being stuck during the reversing process, and avoiding the air-controlled reversing valve from stopping in the middle the second unloading channel connected to the second control channel unloads the load of the second control channel after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, and then the load in the control cavity corresponding to the second control channel is unloaded, so that when the air-controlled reversing valve is switched from the state where the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P to the state where the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the resistance of the valve core of the air-controlled reversing valve to sliding into the control cavity corresponding to the second control port Z can be reduced, thereby avoiding the air-controlled reversing valve from getting stuck during the reversing process and avoiding the air-controlled reversing valve from stopping in the middle position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of an energy-saving hydraulic station in the prior art;

[0021] Figure 2 A schematic diagram of the structure of an energy-saving hydraulic station provided by an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of a pneumatic cylinder and a pneumatic control valve in an energy-saving hydraulic station provided by an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structure of a second gas-controlled valve provided in the first embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the structure of the first air outlet of the air-controlled reversing valve connected to the first air inlet provided in the first embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of the air-controlled reversing valve provided in the first embodiment of the present utility model, in which the second air outlet is connected to the first air inlet;

[0026] Figure 7 A schematic diagram of the structure of the first air outlet of the air-controlled reversing valve connected to the first air inlet provided in the second embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the structure of the second air outlet of the air-controlled reversing valve connected to the first air inlet provided in the second embodiment of the utility model;

[0028] Fig. 9 A schematic diagram of the structure of the air-controlled reversing valve provided in the third embodiment of the present utility model, in which the first air outlet is connected to the first air inlet;

[0029] Fig.10 A schematic diagram of the structure of the air-controlled reversing valve provided in the third embodiment of the present utility model, in which the second air outlet is connected to the first air inlet;

[0030] Fig.11 A schematic diagram of the structure of the air-controlled reversing valve provided in the fifth embodiment of the present utility model, in which the first air outlet is connected to the first air inlet;

[0031] Fig.12 A schematic diagram of the structure of the air-controlled reversing valve provided in the fifth embodiment of the present utility model, in which the second air outlet is connected to the first air inlet;

[0032] Fig.13 A schematic diagram of the structure in which the fourth air outlet of the second air-controlled valve is connected to the third air inlet in the fifth embodiment of the present utility model;

[0033] Fig.14 A schematic diagram of the structure of the fourth air outlet of the second air-controlled valve cutting off the third air inlet provided in the fifth embodiment of the utility model;

[0034] Description of reference numerals:

[0035] 1'-oil tank, 5'-filter, 6'-solenoid valve group, 7'-solenoid valve seat, 8'-output inlet and return oil pipes, 9'-muffler, 10'-pneumatic cylinder, 11'-oil cylinder, 26'-air source, 27'-first air control valve, 28'-second air control valve, 29'-air control reversing valve, 30'-first air source circuit, 31'-second air source circuit, 33'-return oil pipeline;

[0036] 1-gas-liquid booster pump, 11-pneumatic cylinder, 111-cylinder piston, 112-cylinder cavity, 113-cylinder air inlet, 114-position core shaft, 115-shaft return spring, 12-oil cylinder, 2-control valve group, 21-air-controlled reversing valve, 211-reversing valve body, 2111-first valve body connecting channel, 2112-second valve body connecting channel, 212-reversing valve core, A-first air outlet, B-second Air outlet, P-first air inlet, R-first exhaust port, S-second exhaust port, Y-first control port, Z-second control port, 22-first air-controlled valve, C-third air outlet, E-second air inlet, 23-second air-controlled valve, 231-air-controlled valve body, 232-air-controlled valve core, 233-starting block, 234-valve core return spring, D-fourth air outlet, F-third air inlet, U-unloading port, 3-air source. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] First embodiment:

[0039] See also Figure 2, which is a schematic diagram of the structure of the energy-saving hydraulic station provided by the embodiment of the utility model. As shown in the figure, the energy-saving hydraulic station includes: a gas-liquid booster pump 1 and a control valve group 2 for controlling the reversing of the gas-liquid booster pump 1; the gas-liquid booster pump 1 includes a linked pneumatic cylinder 11 and an oil cylinder 12; the control valve group 2 includes a gas-controlled reversing valve 21, a first gas-controlled valve 22 and a second gas-controlled valve 23 which are arranged at both ends of the pneumatic cylinder 11 and are respectively triggered to open by the cylinder piston 111; the first air inlet P of the gas-controlled reversing valve 21, the second air inlet E of the first gas-controlled valve 22, and the third air inlet F of the second gas-controlled valve 23 are respectively connected to the air source 3; the gas-controlled reversing valve 21 includes a first control port Y and a second control port F. Control port Z, a first air outlet A and a second air outlet B respectively connected to the cylinder cavity 112 on both sides of the cylinder piston 111; the third air outlet C of the first air-controlled valve 22 is connected to the first control port Y, and the first air-controlled valve 22 is triggered and opened by the cylinder piston 111 to control the air-controlled reversing valve 21 to connect the first air outlet A and the first air inlet P; the fourth air outlet D of the second air-controlled valve 23 is connected to the second control port Z, and the second air-controlled valve 23 is triggered and opened by the cylinder piston 111 to control the air-controlled reversing valve 21 to connect the second air outlet B and the first air inlet P.

[0040] Specifically, the pneumatic reversing valve 21 is connected to the oil cylinder 12. Specifically, a through hole is provided on the pneumatic cylinder 11, and the pneumatic cylinder 11 and the oil cylinder 12 are connected through the through hole. A cylinder piston 111 in contact with the inner wall is provided in the pneumatic cylinder 11, and an oil cylinder piston in contact with the inner wall is provided in the oil cylinder 12. The cylinder piston 111 and the oil cylinder piston are connected by a piston rod, and the piston rod passes through the through hole. In this embodiment, the two ends of the piston rod are respectively fixedly connected to the cylinder pistons in the two oil cylinders 12 on both sides of the pneumatic cylinder 11, and the cylinder piston 111 is fixedly connected to the piston rod. Of course, the two oil cylinder pistons can also be connected to the cylinder piston 111 through a piston rod respectively, so as to realize the linkage between the pneumatic cylinder 11 and the oil cylinder 12. In this embodiment, a double oil cylinder 12 is used as an example for explanation, and of course, a single oil cylinder 12 can also be used, and no limitation is made in this embodiment. In this embodiment, in addition, the piston area of ​​the cylinder piston 111 is larger than the piston area of ​​the oil cylinder piston. In this embodiment, the piston area of ​​the cylinder piston 111 can be multiple times larger than the piston area of ​​the oil cylinder piston, thereby facilitating the calculation of pressure. For example, if the piston area of ​​the cylinder piston 111 is 6 times the piston area of ​​the oil cylinder piston, the pneumatic cylinder 11 outputs a pressure of 1 bar, and the oil cylinder 12 outputs a pressure of 6 bar.

[0041] Continue to see Figure 2 and Figure 3 The first air control valve 22 is arranged at one end of the pneumatic cylinder 11 (such as Figure 2 and Figure 3 The second air control valve 23 is arranged at the other end of the pneumatic cylinder 11 (as shown in the left end) Figure 2 and Figure 3 The first gas-controlled valve 22 and the second gas-controlled valve 23 are connected to the cylinder piston 111, respectively, so that the cylinder piston 111 can respectively trigger and open the first gas-controlled valve 22 and the second gas-controlled valve 23. Specifically, as Figures 4 to 6 As shown, the valve body of the second air-controlled valve 23, i.e., the air-controlled valve body 231, is provided with a slidable air-controlled valve core 232, and the air-controlled valve body 231 is provided with a fourth air outlet D and a third air inlet F. The sliding of the air-controlled valve core 232 can make the air-controlled valve core 232 slide to a corresponding position connecting the fourth air outlet D and the third air inlet F, as shown in FIG. Figure 5 A start block 233 is provided on one side of the air control valve core 232, and the start block 233 is connected to the air control valve core 232 to slide synchronously relative to the air control valve body 231, thereby achieving the connection and disconnection of the fourth air outlet D and the third air inlet F. The third air inlet F is connected to the air source 3, and the fourth air outlet D is connected to the second control port Z. The start block 233 is partially protruded from the outside of the air-controlled valve body 231, so that when the cylinder piston 111 slides to the right end under the action of air pressure, the cylinder piston 111 can touch the start block 233 to start the second air-controlled valve 23, that is, the start block 233 and the air-controlled valve core 232 slide to the right until the fourth air outlet D and the third air inlet F are connected, thereby realizing the connection between the air source 3 and the second control port Z, so that pressurization can be applied to the control cavity corresponding to the second control port Z, so that the air-controlled reversing valve 21 slides and switches to the position where the second air outlet B is connected to the first air inlet P, that is, the air-controlled reversing valve 21 is controlled to connect the second air outlet B and the first air inlet P, so that the cylinder piston 111 can slide to the left.

[0042] Continue to see Figure 4 A position core shaft 114 is respectively provided at the two end positions of the cylinder piston 111 on the valve body of the pneumatic cylinder 11. The two position core shafts 114 are slidably arranged on the valve body of the pneumatic cylinder 11 along the movement direction of the cylinder piston 111, and the two position core shafts 114 correspond to the first air-controlled valve 22 and the second air-controlled valve 23 respectively, and are used to push the corresponding position core shaft 114 to slide with the cylinder piston 111 when the cylinder piston 111 slides to its end position, thereby pushing the starting block 233 of the first air-controlled valve 22 or the second air-controlled valve 23 to move synchronously, thereby driving the valve core of the first air-controlled valve 22 or the second air-controlled valve 23 to slide, thereby realizing the touch-opening of the first air-controlled valve 22 or the second air-controlled valve 23.

[0043] Specifically, the valve body of the pneumatic cylinder 11 is provided with mounting holes on two side plates corresponding to the two sides of the cylinder piston 111, and each mounting hole is sealed and slidably connected with a position core shaft 114, that is, the position core shaft 114 is slidably penetrated through the valve body side plate of the pneumatic cylinder 11 and can seal the mounting hole, and the end of the position core shaft 114 placed outside the pneumatic cylinder 11 is pressed and contacted with the start block 233 of the first air control valve 22 or the second air control valve 23, for example Figure 4 In the right position shown, the right end of the core shaft 114 is pressed against the left end of the start block 233 of the second air control valve 23. Figure 4 The left end of the left position core shaft 114 shown is pressed against the right end of the start block 233 of the first air control valve 22; when the cylinder piston 111 slides to the right to a position close to the right end point, the right side wall of the cylinder piston 111 is pressed against the left end of the right position core shaft 114 placed in the cylinder cavity 112, which can push the right position core shaft 114 to slide to the right synchronously with the cylinder piston 111 until the cylinder piston 111 slides to the right end point. During the sliding process of the right position core shaft 114, the start block 233 of the second air control valve 23 is pushed to move to the right synchronously, thereby driving the valve core of the second air control valve 23 to move to the right synchronously. When the cylinder piston 111 slides to the right end point position, the valve core of the second air-controlled valve 23 moves to the position where the fourth air outlet D is connected to the third air inlet F, so that the second air-controlled valve 23 can be triggered to open, and then the air-controlled reversing valve 21 is switched to the position where the second air outlet B is connected to the first air inlet P, so that the cylinder piston 111 can slide to the left. The sliding of the cylinder piston 111 to the left can reset the valve core and the start block 233 of the second air-controlled valve 23 under the action of the valve core reset spring 234, and push the right position core shaft 114 to slide to the left synchronously, so as to reset the second air-controlled valve 23 and the position core shaft 114.

[0044] In order to further improve the stability of the resetting of the position core shaft 114, preferably, the position core shaft 114 may also be provided with an axis resetting spring 115, which is used to apply a resetting force to the position core shaft 114 when the cylinder piston 111 slides away from the position core shaft 114 and the cylinder piston 111 and the position core shaft 114 are separated, so as to reset the position core shaft 114.

[0045] In this embodiment, the movement of the left side core shaft 114 and the working process of the first air control valve 22 can refer to the movement of the right side core shaft 114 and the actuation and opening working process of the first air control valve 22, which will not be described in detail here.

[0046] In this embodiment, the structure of the first air-controlled valve 22 is similar to that of the second air-controlled valve 23, that is, the first air-controlled valve 22 is provided with a third air outlet C and a second air inlet E, which are connected to the first control port Y and the air source 3 respectively. When the cylinder piston 111 slides to the left end under the action of air pressure, the cylinder piston 111 can trigger and start the first air-controlled valve 22 to connect the third air outlet C and the second air inlet E, so as to achieve the connection between the first control port Y and the air source 3, so that the control cavity corresponding to the first control port Y can be pressurized, so that the air-controlled reversing valve 21 can slide and switch, and switch to the position where the first air outlet A is connected to the first air inlet P, that is, the air-controlled reversing valve 21 is controlled to connect the first air outlet A and the first air inlet P, so that the cylinder piston 111 can slide to the right. The specific structure and working principle of the first air-controlled valve 22 can refer to the second air-controlled valve 23, and the first air-controlled valve 22 will not be described in detail here.

[0047] Continue to see Figure 4 A valve core reset spring 234 is provided between the air control valve core 232 and the air control valve body 231 of the second air control valve 23, which is used to apply a reset force to the air control valve core 232 when the second air control valve 23 is in a non-starting state, so that the air control valve core 232 can slide and reset, thereby realizing the cutting off of the fourth air outlet D and the third air inlet F. Specifically, after the air-controlled reversing valve 21 connects the second air outlet B with the first air inlet P, the cylinder piston 111 can slide to the left, that is, the cylinder piston 111 gradually moves away from the second air-controlled valve 23 until the two are separated, so that the start block 233 is in a free state, that is, the start of the start block 233 is stopped, that is, the triggering and opening of the second air-controlled valve 23 can be released to make it in a non-starting state, and the air-controlled valve core 232 can slide to the left under the reset force of the valve core reset spring 234, so that the air-controlled valve core 232 slides and resets, thereby realizing the cut-off of the fourth air outlet D and the third air inlet F, as shown in FIG. Figure 6 Of course, a valve core reset spring 234 may also be provided in the first air control valve 22 to reset the valve core of the first air control valve 22, that is, to cut off the third air outlet C and the second air inlet E.

[0048] In order to solve the problem of the air-controlled reversing valve 21 being stuck during the reversing process, a first control channel is formed from the first air-controlled valve 22 to the control cavity corresponding to the first control port Y of the air-controlled reversing valve 21. The first control channel is provided with a first unloading channel, that is, the first control channel is connected to the first unloading channel. After the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the load of the first control channel is unloaded, and then the load in the control cavity corresponding to the first control port Y is unloaded. When the air-controlled reversing valve 21 is reversing, the resistance of the valve core of the air-controlled reversing valve 21, that is, the reversing valve core 212, sliding into the control cavity corresponding to the first control port Y is reduced, thereby avoiding the air-controlled reversing valve 21 from being stuck during the reversing process, and avoiding the air-controlled reversing valve 21 from stopping. The situation in the middle position occurs; the control cavity corresponding to the second control port Z of the second air-controlled reversing valve 21 from the second air-controlled valve 23 forms a second control channel, and the second control channel is provided with a second unloading channel, that is, the second control channel is connected with the second unloading channel, and the load of the second control channel is unloaded after the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, and then the load in the control cavity corresponding to the second control channel is unloaded. When the air-controlled reversing valve 21 is reversing, the resistance of the valve core of the air-controlled reversing valve 21, that is, the reversing valve core 212, to slide into the control cavity corresponding to the second control channel is reduced, thereby avoiding the air-controlled reversing valve 21 from getting stuck during the reversing process, and avoiding the situation where the air-controlled reversing valve 21 stops in the middle position.

[0049] See also Figure 5 and Figure 6 , which shows the preferred structure of the air-controlled reversing valve 21 provided in the first embodiment of the utility model. As shown in the figure, the valve body of the air-controlled reversing valve 21, i.e., the reversing valve body 211, is provided with a first valve body communication channel 2111, and the first valve body communication channel 2111 serves as a first unloading channel, i.e., the first unloading channel is provided on the valve body of the air-controlled reversing valve 21, as shown in FIG. Figure 5 As shown, after the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the first valve body connecting channel 2111 are respectively connected to the control chamber corresponding to the first control port Y and the first exhaust port R, the control chamber corresponding to the first control port Y is connected to the first control channel, and the first exhaust port R is connected to the outside, thereby realizing the connection between the control chamber corresponding to the first control port Y and the outside, that is, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside, and can unload the control chamber corresponding to the first control port Y, thereby unloading the load of the first control channel, which is convenient for the reversing valve core 212 to slide to the left, and is convenient for realizing the switching of the air-controlled reversing valve 21 from the state where the first air outlet A is connected to the first air inlet P to the state where the second air outlet B is connected to the first air inlet P. Specifically, the valve core of the air-controlled reversing valve 21 has two working positions, which are respectively as follows: Figure 5 The right end and Figure 6As shown in the left end, when the valve core of the air-controlled reversing valve 21 slides to the right end, the first air outlet A is connected to the first air inlet P. At the same time, the two ends of the first valve body connecting channel 2111 are respectively connected to the control cavity corresponding to the first control port Y and the first exhaust port R. The first air outlet A is connected to the first air inlet P while unloading the load of the first control channel.

[0050] Continue to see Figure 5 and Figure 6 The reversing valve body 211 is provided with a second valve body communication channel 2112, and the second valve body communication channel 2112 serves as a second unloading channel, that is, the second unloading channel is provided on the valve body of the air-controlled reversing valve 21. Figure 6 As shown, after the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the second valve body connecting channel 2112 are respectively connected to the control chamber corresponding to the second control port Z and the second exhaust port S, the control chamber corresponding to the second control port Z is connected to the second control channel, and the second exhaust port S is connected to the outside world, thereby realizing the connection between the control chamber corresponding to the second control port Z and the outside world, that is, the first unloading channel connects the control chamber corresponding to the second control port Z with the outside world, and can unload the control chamber corresponding to the second control port Z, thereby unloading the load of the second control channel, which is convenient for the reversing valve core 212 to slide to the right, and is convenient for the air-controlled reversing valve 21 to switch from the state where the second air outlet B is connected to the first air inlet P to the state where the first air outlet A is connected to the first air inlet P. Specifically, when the valve core of the air-controlled reversing valve 21 slides to the left end, the second air outlet B is connected to the first air inlet P. At the same time, the two ends of the second valve body connecting channel 2112 are respectively connected to the control cavity corresponding to the second control port Z and the second exhaust port S. The second air outlet B is connected to the first air inlet P while unloading the load of the second control channel.

[0051] Second embodiment:

[0052] The energy-saving hydraulic station provided in the second embodiment differs from the energy-saving hydraulic station provided in the first embodiment in that the first unloading channel and the second unloading channel are arranged at different positions of the air-controlled reversing valve 21. The positional relationship and connection relationship between other components are the same as those of the first embodiment.

[0053] See also Figure 7 and Figure 8, which shows the preferred structure of the air-controlled reversing valve 21 provided in the second embodiment of the utility model. As shown in the figure, the first unloading channel is arranged on the valve core of the air-controlled reversing valve 21, and after the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the first unloading channel connects the control cavity corresponding to the first control port Y with the outside world; the second unloading channel is arranged on the valve core of the air-controlled reversing valve 21, and after the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the second unloading channel connects the control cavity corresponding to the second control port Z with the outside world.

[0054] Specifically, the valve core of the air-controlled reversing valve 21, i.e., the reversing valve core 212, is provided with a first valve core communication channel, and the first valve core communication channel serves as a first unloading channel, i.e., the first unloading channel is provided on the valve core of the air-controlled reversing valve 21, such as Figure 7 As shown, after the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the first valve core communication channel are respectively connected to the control chamber corresponding to the first control port Y and the first exhaust port R, the control chamber corresponding to the first control port Y is connected to the first control channel, and the first exhaust port R is connected to the outside, thereby realizing the connection between the control chamber corresponding to the first control port Y and the outside, that is, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside, and can unload the control chamber corresponding to the first control port Y, thereby unloading the load of the first control channel, which is convenient for the reversing valve core 212 to slide to the left, and is convenient for realizing the switching of the air-controlled reversing valve 21 from the state where the first air outlet A is connected to the first air inlet P to the state where the second air outlet B is connected to the first air inlet P. The valve core of the air-controlled reversing valve 21 has two working positions, which are respectively as follows: Figure 8 The left end and Figure 7 As shown in the right end, when the valve core of the air-controlled reversing valve 21 slides to the right end, the first air outlet A is connected to the first air inlet P. At the same time, the two ends of the first valve core communication channel are respectively connected to the control chamber corresponding to the first control port Y and the first exhaust port R. The first air outlet A is connected to the first air inlet P while unloading the load of the first control channel. The reversing valve core 212 is provided with a second valve core communication channel, which serves as a second unloading channel, that is, the second unloading channel is provided on the valve core of the air-controlled reversing valve 21, as shown in FIG. Figure 8As shown, after the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the second valve core connecting channel are respectively connected to the control chamber corresponding to the second control port Z and the second exhaust port S, the control chamber corresponding to the second control port Z is connected to the second control channel, and the second exhaust port S is connected to the outside world, thereby realizing the connection between the control chamber corresponding to the second control port Z and the outside world, that is, the first unloading channel connects the control chamber corresponding to the second control port Z with the outside world, and can unload the control chamber corresponding to the second control port Z, thereby unloading the load of the second control channel, which is convenient for the reversing valve core 212 to slide to the right, and is convenient for the air-controlled reversing valve 21 to switch from the state where the second air outlet B is connected to the first air inlet P to the state where the first air outlet A is connected to the first air inlet P. When the valve core of the air-controlled reversing valve 21 slides to the left end, the second air outlet B is connected to the first air inlet P. At the same time, the two ends of the second valve body connecting channel 2112 are respectively connected to the control cavity corresponding to the second control port Z and the second exhaust port S. The second air outlet B is connected to the first air inlet P while unloading the load of the second control channel.

[0055] Third embodiment:

[0056] The energy-saving hydraulic station provided in the third embodiment differs from the energy-saving hydraulic station provided in the first embodiment in that the first unloading channel is arranged at a different position of the air-controlled reversing valve 21. The positional relationship and connection relationship between other components are the same as those in the first embodiment.

[0057] See also Fig. 9 and Fig.10, which shows the preferred structure of the air-controlled reversing valve 21 provided in the third embodiment of the utility model. As shown in the figure, the first unloading channel is arranged on the valve core of the air-controlled reversing valve 21, and after the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside. Specifically, a first valve core communication channel is provided on the valve core of the air-controlled reversing valve 21, i.e., the reversing valve core 212. The first valve core communication channel serves as a first unloading channel, i.e., the first unloading channel is provided on the valve core of the air-controlled reversing valve 21. After the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the first valve core communication channel are respectively connected to the control chamber corresponding to the first control port Y and the first exhaust port R, the control chamber corresponding to the first control port Y is connected to the first control channel, and the first exhaust port R is connected to the outside world, thereby realizing the connection between the control chamber corresponding to the first control port Y and the outside world, i.e., the first unloading channel connects the control chamber corresponding to the first control port Y with the outside world, and can unload the control chamber corresponding to the first control port Y, thereby unloading the load of the first control channel, so as to facilitate the reversing valve core 212 to slide leftward, so as to facilitate the switching of the air-controlled reversing valve 21 from the state where the first air outlet A is connected to the first air inlet P to the state where the second air outlet B is connected to the first air inlet P. The valve core of the air-controlled reversing valve 21 has two working positions, namely Figure 8 The left end and Figure 7 As shown in the right end, when the valve core of the air-controlled reversing valve 21 slides to the right end, the first air outlet A is connected to the first air inlet P. At the same time, the two ends of the first valve core connecting channel are respectively connected to the control cavity corresponding to the first control port Y and the first exhaust port R. The first air outlet A is connected to the first air inlet P while unloading the load of the first control channel.

[0058] That is, the load of the first control channel is unloaded through the first valve core communication channel, and the load of the second control channel is unloaded through the second valve body communication channel 2112.

[0059] Fourth embodiment:

[0060] The energy-saving hydraulic station provided in the fourth embodiment differs from the energy-saving hydraulic station provided in the first embodiment in that the second unloading channel is arranged at a different position of the gas-controlled reversing valve 21. The positional relationship and connection relationship between other components are the same as those in the first embodiment.

[0061] In this embodiment, the second unloading channel is arranged on the valve core of the air-controlled reversing valve 21. After the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the second unloading channel connects the control chamber corresponding to the second control port Z with the outside. Specifically, a second valve core communicating channel is provided on the reversing valve core 212, and the second valve core communicating channel serves as a second unloading channel, that is, the second unloading channel is arranged on the valve core of the air-controlled reversing valve 21. After the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the two ends of the second valve core communicating channel are respectively connected to the control chamber corresponding to the second control port Z and the second exhaust port S, the control chamber corresponding to the second control port Z is connected to the second control channel, and the second exhaust port S is connected to the outside world, thereby realizing the connection between the control chamber corresponding to the second control port Z and the outside world, that is, the first unloading channel connects the control chamber corresponding to the second control port Z with the outside world, and can unload the control chamber corresponding to the second control port Z, thereby unloading the load of the second control channel, so as to facilitate the reversing valve core 212 to slide to the right, so as to facilitate the switching of the air-controlled reversing valve 21 from the state where the second air outlet B is connected to the first air inlet P to the state where the first air outlet A is connected to the first air inlet P. When the valve core of the air-controlled reversing valve 21 slides to the left end, the second air outlet B is connected to the first air inlet P. At the same time, the two ends of the second valve body connecting channel 2112 are respectively connected to the control cavity corresponding to the second control port Z and the second exhaust port S. The second air outlet B is connected to the first air inlet P while unloading the load of the second control channel.

[0062] That is, the load of the first control channel is unloaded through the first valve body communication channel 2111, and the load of the second control channel is unloaded through the second valve core communication channel.

[0063] Fifth embodiment:

[0064] The energy-saving hydraulic station provided in the fifth embodiment is different from the energy-saving hydraulic station provided in the first embodiment in that the first unloading channel and the second unloading channel are respectively arranged on the first air-controlled valve 22 and the second air-controlled valve 23, so the corresponding structures of the air-controlled reversing valve 21 and the first air-controlled valve 22 and the second air-controlled valve 23 are different. The positional relationship and connection relationship between other components are the same as those in the first embodiment.

[0065] See also Fig.11 and Fig.12 , which shows the preferred structure of the air-controlled reversing valve 21 provided in the fifth embodiment of the utility model. As shown in the figure, the valve body of the air-controlled reversing valve 21, i.e., the reversing valve body 211, is provided with a slidable reversing valve core 212, the reversing valve body 211 is provided with a first air outlet A, a second air outlet B, a first air inlet P, a first exhaust port R, and a second exhaust port S, and the two ends of the reversing valve body 211 are respectively provided with a first control port Y and a second control port Z.

[0066] See also Fig.13 and Fig.14 , which shows the preferred structure of the second air-controlled valve 23 provided in the fifth embodiment of the utility model. As shown in the figure, the difference between the second air-controlled valve 23 in the fifth embodiment and the second air-controlled valve 23 in the first embodiment is that: the valve body of the second air-controlled valve 23, that is, the air-controlled valve body 231, is provided with a relief port U for connecting to the outside world; the valve core of the second air-controlled valve 23, that is, the air-controlled valve core 232, is provided with a valve core relief communication channel, and the valve core relief communication channel serves as a second relief channel. After the valve core of the second air-controlled valve 23 is reset, the second relief channel connects the fourth air outlet D with the relief port U, so that the second control channel is connected to the outside world.

[0067] Specifically, the air control valve body 231 is provided with a relief port U, which can be connected to the outside. The valve core of the second air control valve 23, that is, the air control valve valve core 232, is provided with a valve core relief communication channel, and the valve core relief communication channel serves as a second relief channel, that is, the second relief channel is provided on the second air control valve 23. Fig.14 As shown, after the second air-controlled valve 23 is relaxed, the valve core of the second air-controlled valve 23 can be reset under the action of the valve core reset spring 234. Then, after the third air inlet F is cut off from the fourth air outlet D, the second unloading channel connects the fourth air outlet D with the unloading port U, thereby connecting the fourth air outlet D with the atmosphere, so that the second control channel is connected with the outside atmosphere, thereby unloading the load of the second control channel. After the second air-controlled valve 23 is pressurized, that is, when the position core shaft 114 pushes the start block 233 of the second air-controlled valve 23, the valve core of the second air-controlled valve 23 moves to the right. The fourth air outlet D can be blocked first, that is, the fourth air outlet D is blocked, so that the second control channel formed by the control cavity corresponding to the fourth air outlet D of the second air-controlled valve 23 to the second control port Z is sealed, forming a sealed control channel, and the pressure is inconvenient; the second air-controlled valve 23 continues to move to the right under pressure, connecting the third air inlet F with the fourth air outlet D, as shown in FIG. Fig.13 As shown, by pressurizing the third air inlet F, the pressure in the second control channel rises, which can drive the air-controlled reversing valve 21 to change direction.

[0068] In this embodiment, the specific structure and working principle of the first air-controlled valve 22 can refer to the second air-controlled valve 23. Therefore, after the first air-controlled valve 22 is pressurized, that is, when the position core shaft 114 pushes the starting block 233 of the first air-controlled valve 22, the valve core of the first air-controlled valve 22 moves to the left, and the third air outlet C can be blocked first, that is, the third air outlet C is blocked, that is, the unloading port of the first air-controlled valve 22 and the third air outlet C are cut off, so that the first control channel formed by the control cavity corresponding to the third air outlet C of the first air-controlled valve 22 to the first control port Y is sealed, forming a sealed control channel, and the pressure is inconvenient; the first air-controlled valve 22 continues to move to the left under pressure, and the second air inlet E is connected with the third air outlet C. The pressure in the first control channel rises through the second air inlet E, which can push the air-controlled reversing valve 21 to reverse. In this embodiment, other structures of the first air-controlled valve 22 are not repeated here.

[0069] In this embodiment, when the air-controlled reversing valve 21 has not been switched to the right direction, the cylinder piston 111 will continue to push the first air-controlled valve 22 or the second air-controlled valve 23 until it is switched to avoid the occurrence of a stuck phenomenon.

[0070] Of course, the present invention may also propose other embodiments. In other embodiments, the structure and setting position of the first unloading channel and the second unloading channel may be other structures, or a combination of other methods. For example, the first unloading channel is arranged on the valve body of the air-controlled reversing valve 21 in the first embodiment, and the second unloading channel is arranged on the second air-controlled valve 23 in the fifth embodiment. The present invention does not make any limitation thereto.

[0071] In summary, the energy-saving hydraulic station provided by each embodiment of the utility model, through the first unloading channel connected to the first control channel, unloads the load of the first control channel when the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, and then unloads the load in the control cavity corresponding to the first control port Y, so that when the air-controlled reversing valve 21 is switched from the state where the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P to the state where the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P, the resistance of the valve core of the air-controlled reversing valve 21 to sliding into the control cavity corresponding to the first control port Y can be reduced, thereby avoiding the air-controlled reversing valve 21 from being stuck during the reversing process, and avoiding the air-controlled reversing valve 21 from being stopped. The situation of stopping in the middle position occurs; the second unloading channel connected to the second control channel unloads the load of the second control channel after the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, and then the load in the control cavity corresponding to the second control channel is unloaded, so that when the air-controlled reversing valve 21 is switched from the state where the first air outlet A of the air-controlled reversing valve 21 is connected to the first air inlet P to the state where the second air outlet B of the air-controlled reversing valve 21 is connected to the first air inlet P, the resistance of the valve core of the air-controlled reversing valve 21 to sliding into the control cavity corresponding to the second control port Z can be reduced, thereby avoiding the air-controlled reversing valve 21 from getting stuck during the reversing process and avoiding the situation of the air-controlled reversing valve 21 stopping in the middle position.

[0072] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0073] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An energy-saving hydraulic station, comprising: A gas-liquid booster pump and a control valve group for controlling the reversal of the gas-liquid booster pump; the gas-liquid booster pump includes a linked pneumatic cylinder and an oil cylinder; the control valve group includes a gas-controlled reversing valve, a first gas-controlled valve and a second gas-controlled valve arranged at both ends of the pneumatic cylinder and respectively triggered to open by the cylinder piston; the first air inlet P of the gas-controlled reversing valve, the second air inlet E of the first gas-controlled valve, and the third air inlet F of the second gas-controlled valve are respectively connected to the air source; the gas-controlled reversing valve includes a first control port Y and a second control port Z, which are respectively connected to the cylinder The cylinder cavities on both sides of the piston are connected to the first air outlet A and the second air outlet B; the third air outlet C of the first air-controlled valve is connected to the first control port Y, and the first air-controlled valve is triggered and opened by the cylinder piston to control the air-controlled reversing valve to connect the first air outlet A and the first air inlet P; the fourth air outlet D of the second air-controlled valve is connected to the second control port Z, and the second air-controlled valve is triggered and opened by the cylinder piston to control the air-controlled reversing valve to connect the second air outlet B and the first air inlet P; characterized in that: The control cavity corresponding to the first control port Y from the first air-controlled valve to the air-controlled reversing valve forms a first control channel; a first unloading channel is provided on the first control channel, and the load of the first control channel is unloaded after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P; The control cavity corresponding to the second control port Z from the second air-controlled valve to the air-controlled reversing valve forms a second control channel; a second unloading channel is provided on the second control channel, and the load of the second control channel is unloaded after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P.

2. An energy-saving hydraulic station according to claim 1, characterized in that: The first unloading channel is arranged on the valve body of the air-controlled reversing valve. After the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the first unloading channel connects the control chamber corresponding to the first control port Y with the outside.

3. An energy-saving hydraulic station according to claim 1, characterized in that: The second unloading channel is arranged on the valve body of the air-controlled reversing valve. After the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the second unloading channel connects the control chamber corresponding to the second control port Z with the outside.

4. The energy-saving hydraulic station according to claim 1, characterized in that: The first unloading channel is arranged on the valve core of the air-controlled reversing valve. After the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the first unloading channel connects the control cavity corresponding to the first control port Y with the outside.

5. The energy-saving hydraulic station according to claim 1, characterized in that: The second unloading channel is arranged on the valve core of the air-controlled reversing valve. After the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the second unloading channel connects the control chamber corresponding to the second control port Z with the outside.

6. The energy-saving hydraulic station according to claim 1, characterized in that: A valve core reset spring is provided between the valve body of the first air-controlled valve and the valve core of the first air-controlled valve, so that after the first air outlet A of the air-controlled reversing valve is connected to the first air inlet P, the cylinder piston can move away from the first air-controlled valve to release the triggering and opening of the first air-controlled valve. The valve core of the first air-controlled valve is reset under the reset force of the valve core reset spring, thereby cutting off the connection between the third air outlet C and the second air inlet E.

7. An energy-saving hydraulic station according to claim 6, characterized in that: The valve body of the first air-controlled valve is provided with a unloading port for communicating with the outside world, and the first unloading channel is arranged on the valve core of the first air-controlled valve. After the valve core of the first air-controlled valve is reset, the first unloading channel connects the third air outlet C with the unloading port to enable the first control channel to communicate with the outside world.

8. The energy-saving hydraulic station according to claim 1, characterized in that: A valve core reset spring is provided between the valve body of the second air-controlled valve and the valve core of the second air-controlled valve, so that after the second air outlet B of the air-controlled reversing valve is connected to the first air inlet P, the cylinder piston can move away from the second air-controlled valve to release the triggering and opening of the second air-controlled valve. The valve core of the second air-controlled valve is reset under the reset force of the valve core reset spring, thereby cutting off the connection between the fourth air outlet D and the third air inlet F.

9. An energy-saving hydraulic station according to claim 8, characterized in that: The valve body of the second air-controlled valve is provided with a unloading port U for communicating with the outside world, and the second unloading channel is arranged on the valve core of the second air-controlled valve. After the valve core of the second air-controlled valve is reset, the second unloading channel connects the fourth air outlet D and the unloading port F to connect the second control channel with the outside world.

10. The energy-saving hydraulic station according to claim 1, characterized in that: A position core shaft is respectively provided on the valve body of the pneumatic cylinder at the two end positions corresponding to the cylinder piston. The two position core shafts are slidably arranged on the valve body of the pneumatic cylinder along the movement direction of the cylinder piston, and the two position core shafts correspond to the first air-controlled valve and the second air-controlled valve respectively, and are used to push the corresponding position core shaft to slide with the cylinder piston when the cylinder piston slides to its end position, thereby pushing the starting block of the first air-controlled valve or the second air-controlled valve to move synchronously, thereby driving the valve core of the first air-controlled valve or the second air-controlled valve to slide, thereby realizing the touch-opening of the first air-controlled valve or the second air-controlled valve.

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