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, the pneumatic control reversing valve comprises a pneumatic control reversing port Y; a third air outlet F2 of the first pneumatic control valve, a sixth air inlet F3 of the second pneumatic control valve and the pneumatic control reversing port Y are communicated to form a reversing cavity; after the first pneumatic control valve is triggered and opened by the cylinder piston, the reversing cavity is loaded; and after the second pneumatic control valve is triggered and opened by the cylinder piston, the load of the reversing cavity is unloaded. Reversing control of the pneumatic control reversing valve is carried out only through the pneumatic control reversing port, after the second pneumatic control valve is triggered to be opened by the air cylinder piston, the load of the reversing containing cavity is unloaded so that the pneumatic control reversing valve can be reset and reversed, meanwhile, unloading is convenient for reversing of the pneumatic control reversing valve again after the first pneumatic control valve is triggered to be opened by the air cylinder piston, circulation is achieved, and the safety is improved. Reversing resistance of the valve element of the pneumatic control reversing valve can be reduced, and therefore blocking and stopping of the pneumatic control reversing valve in the reversing process are avoided.

Description

Technical Field

[0001] The utility model relates to a hydraulic station, in particular to a hydraulic station with intermittent operation. 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 hydraulic drive actuators.

[0003] The Chinese utility model patent specification CN219081986 discloses an energy-saving hydraulic station, as Figure 1 shown, including: an oil tank 1', a gas-liquid booster pump and a solenoid valve group 6'; the liquid outlet of the oil tank 1' is communicated with the liquid inlet of the gas-liquid booster pump; the liquid outlet of the gas-liquid booster pump is communicated with the liquid inlet of the solenoid valve group 6'; the liquid return port of the solenoid valve group 6' is communicated with 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 communicated; a pneumatic piston in contact with the inner wall is arranged in the pneumatic cylinder 10', and an oil cylinder piston in contact with the inner wall is arranged 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 a gas supply device, including: a gas source, a first pneumatic control valve 27', a second pneumatic control valve 28' and a pneumatic control reversing valve 29'; the first 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 gas source is respectively 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'; the pneumatic control reversing valve 28', includes: an A' air outlet and a B' air outlet; the A' air outlet is communicated with one side of the pneumatic cylinder 10', and the B' air outlet is communicated with the other side of the pneumatic cylinder 10'; the first pneumatic control valve 27' is connected to the pneumatic control reversing valve 29' through a first gas source circuit 30' to control the pneumatic control reversing valve 29' to activate the A' air outlet; the second pneumatic control valve 28' is connected to the pneumatic control reversing valve 29' through a second gas source circuit 31' to control the pneumatic control reversing valve 29' to activate the B' air outlet.

[0004] The working process of the above energy-saving hydraulic station is as follows: The pneumatic piston is located on the left side inside the pneumatic cylinder 10', triggering the first pneumatic control valve 27' to open. The first air source circuit 30' pushes the pneumatic control reversing valve 29', and compressed air enters the inside of the pneumatic cylinder 10' from the A' air outlet, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to move to the right (the first pneumatic control valve 27' resets and cuts off). It drives the cylinder pistons in the two side cylinders 11' to move to the right. A negative pressure is formed in the left cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the cylinder 11' through the connected oil inlet pipeline, inlet liquid check valve and inlet and outlet liquid plate; the hydraulic oil in the right cylinder 11' is output to the solenoid valve group through its inlet and outlet liquid plate, outlet liquid check valve and oil outlet pipeline; when the pneumatic piston moves to the right side of the pneumatic cylinder 10', it triggers the second pneumatic control valve 28' to open. The second air source circuit 31' pushes the pneumatic control reversing valve 29', and compressed air enters the inside of the pneumatic cylinder 10' from the B' air outlet, and enters the space on the right side of the pneumatic piston, thereby pushing the pneumatic piston to move to the left (the second pneumatic control valve 28' resets and cuts off), driving the cylinder pistons in the two side cylinders 11' to move to the left. A negative pressure is formed in the right cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the cylinder 11' through the connected oil inlet pipeline, inlet liquid check valve and inlet and outlet liquid plate; the hydraulic oil in the left cylinder 11' is output to the solenoid valve group through its inlet and outlet liquid plate, outlet liquid check valve and oil outlet pipeline; the reciprocating movement of the pneumatic cylinder 10' forms a continuous hydraulic output. When the set pressure is reached, the pneumatic cylinder 10' stops moving to maintain a constant pressure, and the pneumatic cylinder 10' maintains a pressurized state and stops moving, thereby no longer consuming compressed air. Compared with the traditional hydraulic station, it reduces energy consumption and heat generation, achieving the purpose of energy saving.

[0005] In the factory use environment of the above energy-saving hydraulic station, the first pneumatic control valve 27' and the second pneumatic control valve 28' need to be connected to the air source. After one of the pneumatic control valves is triggered to open, the gas in the air source flows through this pneumatic control valve and then flows into the pneumatic control reversing valve 29', pushing the pneumatic control reversing valve 29' to perform commutation on the corresponding side. As a result, the two-way commutation of the pneumatic control reversing valve is limited by the air source. When the air supply pressure becomes low and insufficient during commutation on either side, the pneumatic cylinder piston retracts a little, which causes the commutation valve core to stop in the middle position, that is, neither the A' air outlet nor the B' air outlet of the pneumatic control reversing valve is connected to the air source, the air intake at both ends of the cylinder is interrupted, the air-liquid booster pump stops, and no longer outputs hydraulic pressure. The hydraulic station will experience jamming, the tooling loses pressure, resulting in problems such as the workpiece not being clamped tightly and tool collision. Even if an energy storage tank is used, when the tooling uses hydraulic pressure again, after exhausting the pressure in the accumulator behind the hydraulic check valve, the tooling will still lose pressure, resulting in problems such as the workpiece not being clamped tightly and tool collision. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an energy-saving hydraulic station that will not experience jamming on both sides.

[0007] To solve the above technical problems, the present utility model provides the following technical solutions:

[0008] The present utility model proposes an energy-saving hydraulic station, which includes: a gas-liquid booster pump and a control valve group for controlling the commutation of the gas-liquid booster pump; the gas-liquid booster pump includes a pneumatic cylinder and an oil cylinder that are linked; the control valve group includes a pneumatic control reversing valve, a first pneumatic control valve and a second pneumatic control valve that are arranged at both ends of the pneumatic cylinder and are respectively triggered and opened by a cylinder piston; the pneumatic control reversing valve includes a pneumatic control reversing port Y; a third air outlet F2 of the first pneumatic control valve, a sixth air inlet F3 of the second pneumatic control valve, and the pneumatic control reversing port Y are connected to form a commutation cavity; after the first pneumatic control valve is triggered and opened by the cylinder piston, a fifth air inlet F1 of the first pneumatic control valve is connected to the third air outlet F2, and a load is applied to the commutation cavity to push the pneumatic control reversing valve to commutate; after the second pneumatic control valve is triggered and opened by the cylinder piston, a sixth air inlet F3 of the second pneumatic control valve is connected to a fourth air outlet F4, and the load in the commutation cavity is removed to enable the pneumatic control reversing valve to reset and commutate.

[0009] Further, in the above energy-saving hydraulic station, the fifth air inlet F1 of the first pneumatic control valve is connected to a gas source. After the first pneumatic control valve is triggered and opened by the cylinder piston, gas enters from the fifth air inlet F1, flows through the third air outlet F2 and enters the commutation cavity for loading, so that the gas flows in from the pneumatic control reversing port Y and pushes the pneumatic control reversing valve to commutate.

[0010] Further, in the above energy-saving hydraulic station, the pneumatic control reversing valve further includes: an exhaust port, a first air outlet A and a second air outlet B that are respectively connected to a third air inlet C and a fourth air inlet D of the pneumatic cylinder; the third air inlet C is connected to a second cylinder cavity of the pneumatic cylinder, and the second cylinder cavity and the first pneumatic control valve are arranged on the same side of the cylinder piston; the fourth air inlet D is connected to a first cylinder cavity of the pneumatic cylinder, and the first cylinder cavity and the second pneumatic control valve are arranged on the same side of the cylinder piston; gas flows in from the pneumatic control reversing port Y and pushes the pneumatic control reversing valve to commutate, connecting the second air outlet B to the first air inlet P, and connecting the first air outlet A to the exhaust port of the pneumatic control reversing valve, so that the fourth air inlet D intakes air and the third air inlet C exhausts air, to push the cylinder piston to move towards the side where the first cylinder cavity connected to the third air inlet C is located. When there is a gap between the cylinder piston and the first pneumatic control valve, the first pneumatic control valve resets and disconnects the fifth air inlet F1 from the third air outlet F2. As the fourth air inlet D intakes air, the cylinder piston continues to move towards the side where the second cylinder cavity is located until it moves in place, and the cylinder piston pushes the second pneumatic control valve to trigger and open the second pneumatic control valve.

[0011] Further, for the above energy-saving hydraulic station, the fourth air outlet F4 of the second pneumatic control valve is communicated with the outside. After the second pneumatic control valve is triggered and opened by the cylinder piston, the sixth air inlet F3 of the second pneumatic control valve is communicated with the fourth air outlet F4. The gas in the commutation cavity flows into the second pneumatic control valve from the sixth air inlet F3 and flows out from the fourth air outlet F4 to unload the load of the commutation cavity.

[0012] Further, for the above energy-saving hydraulic station, the pneumatic control reversing valve further includes: an exhaust port, a first air outlet A and a second air outlet B respectively communicated with the third air inlet C and the fourth air inlet D of the pneumatic cylinder; the third air inlet C is communicated with the second cylinder cavity of the pneumatic cylinder, and the second cylinder cavity and the first pneumatic control valve are arranged on the same side of the cylinder piston; the fourth air inlet D is communicated with the first cylinder cavity of the pneumatic cylinder, and the first cylinder cavity and the second pneumatic control valve are arranged on the same side of the cylinder piston; after the gas in the commutation cavity flows out from the fourth air outlet F4, the pneumatic control reversing valve can reset and reverse, communicate the first air outlet A with the first air inlet P, and communicate the second air outlet B with the exhaust port of the pneumatic control reversing valve, so that the third air inlet C intakes air, the fourth air inlet D exhausts air, and the cylinder piston moves towards the side where the second cylinder cavity communicated with the fourth air inlet D is located. When there is a gap between the cylinder piston and the second pneumatic control valve, the second pneumatic control valve resets and disconnects the sixth air inlet F3 from the fourth air outlet F4; as the third air inlet C intakes air, the cylinder piston continues to move towards the side where the second cylinder cavity is located until it moves in place, and the cylinder piston pushes the first pneumatic control valve to trigger and open the first pneumatic control valve.

[0013] Further, for the above energy-saving hydraulic station, a silencer is provided at the fourth air outlet F4 of the second pneumatic control valve.

[0014] Further, for the above energy-saving hydraulic station, the pneumatic control reversing valve is a two-position five-way valve, and its exhaust ports are two, namely a first exhaust port R and a second exhaust port S. When the first air outlet A is communicated with the first air inlet P, the second air outlet B is communicated with the second exhaust port S; when the second air outlet B is communicated with the first air inlet P, the first air outlet A is communicated with the first exhaust port R.

[0015] Further, for the above energy-saving hydraulic station, a first return spring is provided between the valve core and the valve body of the first pneumatic control valve, which is used to apply a return force to the valve core of the first pneumatic control valve when there is a gap between the cylinder piston and the valve core of the first pneumatic control valve, so as to realize the reset of the valve core of the first pneumatic control valve.

[0016] Furthermore, in the above-mentioned energy-saving hydraulic station, a second return spring is provided between the spool and the valve body of the second pneumatic control valve, which is used to apply a return force to the spool of the second pneumatic control valve when there is a gap between the cylinder piston and the spool of the second pneumatic control valve, so as to realize the reset of the spool of the second pneumatic control valve.

[0017] Furthermore, in the above-mentioned energy-saving hydraulic station, a third return spring is provided between the spool and the valve body of the pneumatic reversing valve, which is used to apply a return force to the spool of the pneumatic reversing valve when the pneumatic reversing port exhausts, so that the spool of the pneumatic reversing valve resets and reverses.

[0018] For the energy-saving hydraulic station provided by the present invention, a reversing cavity is formed by connecting the third air outlet of the first pneumatic control valve, the sixth air inlet of the second pneumatic control valve, and the pneumatic reversing port. After the first pneumatic control valve is triggered and opened by the cylinder piston, the fifth air inlet F1 of the first pneumatic control valve is connected to the third air outlet F2 to load the reversing cavity to push the pneumatic reversing valve to reverse; after the second pneumatic control valve is triggered and opened by the cylinder piston, the sixth air inlet F3 of the second pneumatic control valve is connected to the fourth air outlet F4 to unload the load of the reversing cavity, so that the pneumatic reversing valve resets and reverses to realize the switching of two positions of the pneumatic reversing valve. The connection between the third air outlet F2 of the first pneumatic control valve and the sixth air inlet F3 of the second pneumatic control valve can realize the association between the first pneumatic control valve and the second pneumatic control valve. Through the connection of the pneumatic reversing port Y with the third air outlet F2 of the first pneumatic control valve and the sixth air inlet F3 of the second pneumatic control valve, the pneumatic reversing valve can realize the switching of two positions respectively after the first pneumatic control valve and the second pneumatic control valve are triggered. In particular, only by controlling the reversal of the pneumatic reversing valve through the pneumatic reversing port Y, after the first pneumatic control valve is triggered and opened by the cylinder piston, the fifth air inlet F1 of the first pneumatic control valve is connected to the third air outlet F2 to load the reversing cavity to realize reversal. After the second pneumatic control valve is triggered and opened by the cylinder piston, the sixth air inlet F3 of the second pneumatic control valve is connected to the fourth air outlet F4 to unload the load of the reversing cavity, so that the pneumatic reversing valve resets and reverses. The unloading is convenient for the pneumatic reversing valve to reverse again after the first pneumatic control valve is triggered and opened by the cylinder piston, realizing circulation, reducing the resistance of the spool reversal of the pneumatic reversing valve, thus avoiding the jamming during the reversal of the pneumatic reversing valve and preventing the pneumatic reversing valve from stopping in the middle position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1Schematic diagram of the structure of an energy-saving hydraulic station in the prior art;

[0021] Figure 2 Schematic diagram of the structure of the second air control valve being triggered and opened in a single cylinder of the energy-saving hydraulic station provided by an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the structure of the first air control valve being triggered and opened in a single cylinder of the energy-saving hydraulic station provided by an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the structure of the second air control valve being triggered and opened in a double cylinder of the energy-saving hydraulic station provided by an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the air-liquid booster pump provided by an embodiment of the present invention;

[0025] Figure 6 Another schematic diagram of the structure of the air-liquid booster pump provided by an embodiment of the present invention;

[0026] Explanation of reference numerals:

[0027] 1'- Oil tank, 5'- Filter, 6'- Solenoid valve group, 7'- Solenoid valve seat, 8'- Output inlet and return oil pipe, 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;

[0028] 1 - Air-liquid booster pump, 11 - Pneumatic cylinder, 111 - Cylinder piston, 112 - First cylinder cavity, 113 - Second cylinder cavity, C - Third air inlet, D - Fourth air inlet D, 12 - Oil cylinder, 121 - Inlet check valve, 122 - Outlet check valve, 123 - Oil filter screen, 2 - Control valve group, 21 - Air control reversing valve, A - First air outlet, B - Second air outlet, P - First air inlet, R - First exhaust port, S - Second exhaust port, Y - Air control reversing port, 22 - First air control valve, 221 - First air control valve spool, 222 - First return spring, F1 - Fifth air inlet, F2 - Third air outlet, 23 - Second air control valve, 231 - Second air control valve body, 232 - Second return spring, F3 - Sixth air inlet, F4 - Fourth air outlet, 3 - Air source, 4 - Muffler, 5 - Reversing pipeline. Detailed implementation manners

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully communicated to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] Refer to Figure 2 , which is a schematic structural diagram of an energy-saving hydraulic station provided by an embodiment of the present invention. 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 commutation of the gas-liquid booster pump 1; the gas-liquid booster pump 1 includes a pneumatic cylinder 11 and an oil cylinder 12 that are linked; the control valve group 2 includes a pneumatic control reversing valve 21, a first pneumatic control valve 22 and a second pneumatic control valve 23 that are arranged at both ends of the pneumatic cylinder 11 and are respectively triggered and opened by a cylinder piston 111.

[0031] Specifically, a through hole is provided on the pneumatic cylinder 11, and the pneumatic cylinder 11 and the oil cylinder 12 are communicated through the through hole. A cylinder piston 111 that contacts the inner wall is arranged inside the pneumatic cylinder 11, and an oil cylinder piston that contacts the inner wall is arranged inside 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, both ends of the piston rod are respectively fixedly connected to the oil cylinder piston in the pneumatic cylinder 11 and the oil cylinder 12 to realize the linkage between the pneumatic cylinder 11 and the oil cylinder 12. In this embodiment, a single oil cylinder is taken as an example for illustration. Of course, it can also be a double oil cylinder, as Figure 4 shown, both ends of the piston rod are respectively fixedly connected to the oil cylinder pistons in the two oil cylinders 12, and the cylinder piston 111 is fixedly connected to the piston rod. Of course, the two oil cylinder pistons can also be respectively connected to the cylinder piston 111 through a piston rod to realize the linkage between the pneumatic cylinder 11 and the oil cylinder 12. 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 several times larger than the piston area of the oil cylinder piston, so as to facilitate the calculation of the pressure. For example, if the piston area of the cylinder piston 111 is 6 times the piston area of the oil cylinder piston, when the pneumatic cylinder 11 outputs a pressure of 1 bar, the oil cylinder 12 outputs a pressure of 6 bar. Inside the pneumatic cylinder 11, on both sides of the cylinder piston 111 (such as Figure 2On the left and right sides as shown, a first cylinder cavity 112 and a second cylinder cavity 113 are respectively formed. The pneumatic cylinder 11 is also provided with a third air inlet C and a fourth air inlet D that are respectively communicated with the first cylinder cavity 112 and the second cylinder cavity 113, so as to be used as the air inlet and outlet of the first cylinder cavity 112 and the second cylinder cavity 113 respectively. Furthermore, the position of the cylinder piston 111 is controlled through pneumatic control, thereby driving the oil cylinder 12 to act and realizing the corresponding hydraulic drive execution action.

[0032] In this embodiment, an oil inlet check valve 121 and an oil outlet check valve 122 are connected to one side cavity of the oil cylinder 12. The flow direction of the hydraulic oil is controlled through the oil inlet check valve 121 and the oil outlet check valve 122, so that when the oil enters and exits the side cavity, it can enter and exit through the pipeline where the corresponding check valve is located.

[0033] Continue to refer to Figures 2 to 4 , the pneumatic control reversing valve 21 includes a pneumatic control reversing port Y. The first pneumatic control valve 22 includes a fifth air inlet F1 and a third air outlet F2. The second pneumatic control valve 23 includes a sixth air inlet F3 and a fourth air outlet F4.

[0034] Specifically, the pneumatic control reversing valve 21 can be a two-position reversing valve. A pneumatic control reversing port Y is provided on the valve housing of the pneumatic control reversing valve 21. By injecting air into the pneumatic control reversing valve 21 through the pneumatic control reversing port Y, the valve core of the pneumatic control reversing valve 21 can be pushed to reverse, and through the air outlet of the pneumatic control reversing port Y, the valve core of the pneumatic control reversing valve 21 can be reset to reverse, thereby realizing the switching between two positions. The first pneumatic control valve 22 includes a fifth air inlet F1 and a third air outlet F2, and the communication and disconnection between the fifth air inlet F1 and the third air outlet F2 can be realized by switching the position of the valve core of the first pneumatic control valve 22; the second pneumatic control valve 23 includes a sixth air inlet F3 and a fourth air outlet F4, and the communication and disconnection between the sixth air inlet F3 and the fourth air outlet F4 can be realized by switching the position of the valve core of the second pneumatic control valve 22. In this embodiment, the first pneumatic control valve 22 and the second pneumatic control valve 23 are respectively placed on the two cylinder end covers of the pneumatic cylinder 11 to be respectively touched by the cylinder piston 111. That is to say, the first pneumatic control valve 22 is arranged at one end of the pneumatic cylinder 11 (such as Figure 2 and Figure 4 the right end shown), the second pneumatic control valve 23 is arranged at the other end of the pneumatic cylinder 11 (such as Figure 2 and Figure 4 the left end shown), and the first pneumatic control valve 22 and the second pneumatic control valve 23 are respectively connected to the cylinder piston 111, so that the cylinder piston 111 can respectively touch and open the first pneumatic control valve 22 and the second pneumatic control valve 23. Of course, the installation positions of the first pneumatic control valve 22 and the second pneumatic control valve 23 can also be arranged in reverse, such as Figure 5As shown, the first pneumatic control valve 22 can be arranged at the left end of the pneumatic cylinder 11, and the second pneumatic control valve 23 is arranged at the right end of the pneumatic cylinder 11. The positional relationship between the two can be determined according to the actual situation, and no limitation is made thereto in this embodiment.

[0035] Continue to refer to Figures 2 to 5 , a slidable first pneumatic control valve spool 221 is arranged inside the valve body of the first pneumatic control valve 22. A fifth air inlet F1 and a third air outlet F2 are arranged on the valve body of the first pneumatic control valve 22. The sliding of the first pneumatic control valve spool 221 can make the first pneumatic control valve spool 221 slide to the corresponding position where the fifth air inlet F1 and the third air outlet F2 are communicated, and can also slide to the cut-off position between the fifth air inlet F1 and the third air outlet F2. Specifically, the first pneumatic control valve spool 221 is embedded in the cylinder end cover of the pneumatic cylinder 11 in a slidable manner, that is, the cylinder end cover of the pneumatic cylinder 11 serves as the valve body of the first pneumatic control valve 22. And, the trigger start end of the first pneumatic control valve spool 221 (such as Figure 4 the left end shown) is arranged inside the second cylinder cavity 113, so that when the cylinder piston 111 slides to the right in place, the first pneumatic control valve 22 can be triggered to start. That is, the cylinder piston 111 applies pressure to push the first pneumatic control valve spool 221 to move to the right, and can move to the right in place, so that the fifth air inlet F1 and the third air outlet F2 are communicated. To facilitate the automatic reset of the first pneumatic control valve spool 221, preferably, a first return spring 222 can also be arranged between the valve body of the first pneumatic control valve 22 and the first pneumatic control valve spool 221, which is used to apply a reset force to the valve spool of the first pneumatic control valve 22 when there is a gap between the cylinder piston 111 and the valve spool of the first pneumatic control valve 22, that is, the first pneumatic control valve spool 221, so as to realize the reset of the valve spool of the first pneumatic control valve 22. That is, after the cylinder piston 111 moves to the left, the first return spring 222 can apply a leftward reset force to the valve spool of the first pneumatic control valve 22, so that the valve spool of the first pneumatic control valve 22 moves to the left, realizes the reset and commutation of the valve spool of the first pneumatic control valve 22, and can cut off the communication between the fifth air inlet F1 and the third air outlet F2.

[0036] In this embodiment, for the specific structure and working principle of the second pneumatic control valve 23, reference can be made to the first pneumatic control valve 22, and they can refer to each other; among them, the commutation process of the second pneumatic control valve 23 is as follows: after the second pneumatic control valve 23 is pressurized, that is, the cylinder piston 111 pushes the second pneumatic control valve 23, causing the valve core of the second pneumatic control valve, namely the second pneumatic control valve core 231, to move to the left, which can realize the commutation of the second pneumatic control valve 23 and the connection between the sixth air inlet F3 and the fourth air outlet F4; a second return spring 232 can also be provided between the valve body of the second pneumatic control valve 23 and the second pneumatic control valve core 231, which is used to apply a return force to the valve core of the second pneumatic control valve when there is a gap between the cylinder piston 111 and the valve core of the second pneumatic control valve, namely the second pneumatic control valve core 231, so as to realize the reset of the valve core of the second pneumatic control valve. That is, after the cylinder piston 111 moves to the right, the second return spring 232 can apply a rightward return force to the valve core of the second pneumatic control valve, so that the valve core of the second pneumatic control valve moves to the right, realizing the reset commutation of the valve core of the second pneumatic control valve and cutting off the connection between the sixth air inlet F3 and the fourth air outlet F4.

[0037] In this embodiment, the pneumatic control reversing valve 21 further includes: an exhaust port, a first air outlet A and a second air outlet B respectively communicating with the third air inlet C and the fourth air inlet D of the pneumatic cylinder 11. Specifically, the pneumatic control reversing valve 21 is provided with a first air inlet P, an exhaust port, a first air outlet A and a second air outlet B. The first air outlet A communicates with the third air inlet C, and the second air outlet B communicates with the fourth air inlet D, so as to realize the switching of the air intake and exhaust of the third air inlet C and the fourth air inlet D respectively through the two-position switching of the pneumatic control reversing valve 21, and further control the movement direction of the cylinder piston 111.

[0038] In this embodiment, the pneumatic control reversing valve 21 can be a two-position five-way valve, and it has two exhaust ports, namely the first exhaust port R and the second exhaust port S. When the first air outlet A is communicated with the first air inlet P, the second air outlet B is communicated with the second exhaust port S; when the second air outlet B is communicated with the first air inlet P, the first air outlet A is communicated with the first exhaust port R. Specifically, the pneumatic control reversing port Y is connected with a pneumatic control cavity. When gas is injected into the pneumatic control cavity during loading in the pneumatic control cavity, the gas flows from the pneumatic control reversing port Y into the pneumatic control reversing valve 21 for injection, which can push the valve core of the pneumatic control reversing valve 21 to move forward, so that the pneumatic control reversing valve 21 is reversed in place, making the second air outlet B communicate with the first air inlet P, and the first air outlet A communicate with the first exhaust port R. Then, the fourth air inlet D is inflated through the second air outlet B, and the third air inlet C is exhausted through the first air outlet A and the first exhaust port R, so that the cylinder piston 111 can move towards the side where the first cylinder cavity 112 communicated with the third air inlet C is located. To facilitate the reset and reversal of the pneumatic control reversing valve 21, that is, to facilitate the reset and reversal of the pneumatic control reversing valve 21 after the pneumatic control cavity is unloaded, preferably, a third return spring is provided between the valve core and the valve body of the pneumatic control reversing valve 21, which is used to apply a reset force to the valve core of the pneumatic control reversing valve 21 when the pneumatic control cavity is unloaded, that is, when the pneumatic control reversing port Y exhausts air, so that the valve core of the pneumatic control reversing valve 21 is reset and reversed, and then the first air outlet A communicates with the first air inlet P, and the second air outlet B communicates with the second exhaust port S.

[0039] Continue to refer to Figures 2 to 5 , the third air inlet C is connected to the first cylinder cavity 112 of the pneumatic cylinder 11, and the first cylinder cavity 112 and the second pneumatic control valve 23 are arranged on the same side of the cylinder piston 111 (such as Figure 2 shown on the left side); the fourth air inlet D is connected to the second cylinder cavity 113 of the pneumatic cylinder 11, and the second cylinder cavity 113 and the first pneumatic control valve 22 are arranged on the same side of the cylinder piston 111 (such as Figure 2 shown on the right side). When the third air inlet C inflates and the fourth air inlet D exhausts air, the cylinder piston 111 can move towards the side where the second cylinder cavity 113 is located, that is, move to the right, so as to be able to press against the first pneumatic control valve 22 when moving to the right end to trigger and start the first pneumatic control valve 22; when the third air inlet C exhausts air and the fourth air inlet D inflates, the cylinder piston 111 can move towards the side where the first cylinder cavity 112 is located, that is, move to the left, so as to be able to press against the second pneumatic control valve 23 when moving to the left end to trigger and start the second pneumatic control valve 23.

[0040] Continue to refer to Figures 2 to 4, the third air outlet F2 of the first pneumatic control valve 22, the sixth air inlet F3 of the second pneumatic control valve 23, and the pneumatic control switching port Y are connected to form a switching cavity, serving as a pneumatic control cavity; after the first pneumatic control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 of the first pneumatic control valve 22 is connected to the third air outlet F2, loading the switching cavity to push the pneumatic control switching valve 21 to switch; after the second pneumatic control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second pneumatic control valve 23 is connected to the fourth air outlet F4, unloading the load of the switching cavity to enable the pneumatic control switching valve 21 to reset and switch, so as to realize the two-position switching of the pneumatic control switching valve 21.

[0041] Specifically, the third air outlet F2 of the first pneumatic control valve 22 is connected to the sixth air inlet F3 of the second pneumatic control valve 23, and the two can be connected through a switching pipeline 5. Moreover, the pneumatic control switching port Y is connected to the switching pipeline 5 and can also be connected through a connecting pipeline. The internal combination of the switching pipeline 5, the pneumatic control switching port Y, and the connecting pipeline between the two forms a switching cavity, and the position of the spool of the pneumatic control switching valve 21 is controlled and adjusted by the pressure in the switching cavity. After the first pneumatic control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 of the first pneumatic control valve 22 is connected to the third air outlet F2, and air can be injected into the switching cavity through the fifth air inlet F1 to load the switching cavity, so that the injected gas flows from the fifth air inlet F1, successively through the third air outlet F2, the switching cavity, and can flow into the pneumatic control switching valve 21 from the pneumatic control switching port Y to push the spool of the pneumatic control switching valve 21 to move, so that the spool of the pneumatic control switching valve 21 can move in place to realize the switching of the pneumatic control switching valve 21. After the second pneumatic control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second pneumatic control valve 23 is connected to the fourth air outlet F4, and the gas in the switching cavity can be discharged through the fourth air outlet F4, that is, the gas in the switching cavity is discharged from the fourth air outlet F4, and then the gas in the pneumatic control switching valve 21 is discharged, realizing the unloading of the switching cavity, and further enabling the spool of the pneumatic control switching valve 21 to move reversely in place, realizing the reset and switching of the pneumatic control switching valve 21, thereby realizing the two-position switching of the pneumatic control switching valve 21.

[0042] Continue to refer to Figures 2 to 4 , the fifth air inlet F1 of the first pneumatic control valve 22 is connected to the air source 3. After the first pneumatic control valve 22 is triggered and opened by the cylinder piston 111, after the gas enters from the fifth air inlet F1, it flows through the third air outlet F2 and enters the switching cavity for loading, so that the gas flows into the pneumatic control switching valve 21 from the pneumatic control switching port Y and pushes the pneumatic control switching valve 21 to switch.

[0043] Specifically, the fifth air inlet F1 of the first pneumatic control valve 22 can be connected to an air source. The air source 3 can inject air into the fifth air inlet F1. After the first pneumatic control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 communicates with the third air outlet F2, so as to inject air into the commutation cavity through the air source 3, realize the loading of the commutation cavity, and further realize the commutation of the pneumatic commutation valve 21.

[0044] In this embodiment, after the first pneumatic control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 communicates with the third air outlet F2, and air is injected into the commutation cavity through the air source 3 to realize the loading of the commutation cavity, so that the gas flows in from the pneumatic commutation port Y and pushes the pneumatic commutation valve 21 to commutate, so as to push the spool of the pneumatic commutation valve 21 to move to the in-place position. At this position, the second air outlet B communicates with the first air inlet P, and the first air outlet A communicates with the exhaust port of the pneumatic commutation valve 21. For example, the first air outlet A communicates with the first exhaust port R, so that the fourth air inlet D intakes air and the third air inlet C exhausts air, so as to push the cylinder piston 111 to move towards the side of the first cylinder cavity 112 communicated with the third air inlet C, that is, to push the cylinder piston 111 to move to the left (relative to Figure 2 the position shown), when there is a gap between the cylinder piston 111 and the first pneumatic control valve 22, the first pneumatic control valve 22 resets and disconnects the fifth air inlet F1 from the third air outlet F2. Since at this time the first pneumatic control valve 22 disconnects the communication between the fifth air inlet F1 and the third air outlet F2, at the same time, the second pneumatic control valve 23 is also in the disconnected state and disconnects the sixth air inlet F3 from the fourth air outlet F4, so the pressure in the commutation cavity can be maintained; therefore, the pneumatic commutation valve 21 can be maintained at this position to ensure the continuous intake of air at the fourth air inlet D. As the fourth air inlet D intakes air, the cylinder piston 111 continues to move towards the side of the first cylinder cavity 112 until it moves to the in-place position, that is, moves to the left end. The cylinder piston 111 pushes the second pneumatic control valve 23 to trigger and open the second pneumatic control valve 23.

[0045] Continue to refer to Figures 2 to 4 、 Figure 6 , the fourth air outlet F4 of the second pneumatic control valve 23 communicates with the outside. After the second pneumatic control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second pneumatic control valve 23 communicates with the fourth air outlet F4, and the gas in the commutation cavity flows into the second pneumatic control valve 23 from the sixth air inlet F3 and flows out from the fourth air outlet F4 to unload the load of the commutation cavity.

[0046] Specifically, the fourth air outlet F4 of the second pneumatic control valve 23 is connected to the outside, and exhaust can be carried out through the fourth air outlet F4; a silencer 4 can also be provided at the fourth air outlet F4 of the second pneumatic control valve 23 to reduce noise. After the second pneumatic control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second pneumatic control valve 23 is communicated with the fourth air outlet F4, and exhaust through the fourth air outlet F4 can be used to achieve the exhaust in the commutation cavity, that is, to achieve the unloading of the commutation cavity. Furthermore, the gas in the pneumatic commutation valve 21 flows out from the pneumatic commutation port Y and then is discharged from the fourth air outlet F4, so that the valve core of the pneumatic commutation valve 21 can be reset and commutated under the action of the third return spring. At this position, the first air outlet A is communicated with the first air inlet P, the second air outlet B and the exhaust port of the pneumatic commutation valve 21. For example, the second air outlet B is communicated with the second exhaust port S. That is to say, the third air inlet C intakes air, and the fourth air inlet D exhausts air, thereby pushing the cylinder piston 111 to move towards the side of the second cylinder cavity 113 communicated with the fourth air inlet D, that is, pushing the cylinder piston 111 to move to the right (relative to Figure 4 the position shown). During the movement, when there is a gap between the cylinder piston 111 and the second pneumatic control valve 23, the second pneumatic control valve 23 resets and disconnects the communication between the sixth air inlet F3 and the fourth air outlet F4. Since the second pneumatic control valve 23 disconnects the communication between the sixth air inlet F3 and the fourth air outlet F4 at this time, and at the same time, the first pneumatic control valve 22 is also in the disconnected state, the commutation cavity is in the unloaded state after unloading; therefore, the pneumatic commutation valve 21 can be maintained at this position to ensure continuous intake of air at the third air inlet C. As the third air inlet C intakes air, the cylinder piston 111 continues to move towards the side of the second cylinder cavity 113 until it moves in place, that is, it moves to the right end (relative to Figure 4 the position shown). The cylinder piston 111 pushes the first pneumatic control valve 22 to trigger and open the first pneumatic control valve 22, realizing the commutation cycle of the pneumatic cylinder 11.

[0047] In the first implementation manner of this embodiment, the fourth air outlet F4 of the second pneumatic control valve 23 is communicated with the outside, and the fifth air inlet F1 of the first pneumatic control valve 22 can be connected to the air source. Of course, in the second implementation manner of this embodiment, the fourth air outlet F4 of the second pneumatic control valve 23 can also be communicated with the air source, and the fifth air inlet F1 of the first pneumatic control valve 22 is communicated with the outside. That is to say, when the second pneumatic control valve 23 is triggered and started, the commutation cavity is loaded, and when the first pneumatic control valve 22 is triggered and started, the commutation cavity is unloaded. Other working methods and processes can refer to the relevant methods in the first implementation manner of this embodiment, and the working process of the second implementation manner will not be elaborated here.

[0048] In summary, for the energy-saving hydraulic station provided by each embodiment of the present utility model, a commutation cavity is formed by connecting the third air outlet F2 of the first air control valve 22, the sixth air inlet F3 of the second air control valve 23, and the air control commutation port Y. So that after the first air control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 of the first air control valve 22 is connected to the third air outlet F2 to load the commutation cavity, so as to push the air control commutation valve 21 to commutate; and after the second air control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second air control valve 23 is connected to the fourth air outlet F4 to unload the load of the commutation cavity, so that the air control commutation valve 21 resets and commutates, so as to realize the two-position switching of the air control commutation valve 21. The connection between the third air outlet F2 of the first air control valve 22 and the sixth air inlet F3 of the second air control valve 23 can realize the association between the first air control valve 22 and the second air control valve 23. And through the connection between the air control commutation port Y and the third air outlet F2 of the first air control valve 22 and the sixth air inlet F3 of the second air control valve 23, the air control commutation valve 21 can realize two-position switching respectively after the first air control valve 22 and the second air control valve 23 are triggered. Especially, only by controlling the commutation of the air control commutation valve 21 through the air control commutation port Y, after the first air control valve 22 is triggered and opened by the cylinder piston 111, the fifth air inlet F1 of the first air control valve 22 is connected to the third air outlet F2 to load the commutation cavity to realize commutation. And after the second air control valve 23 is triggered and opened by the cylinder piston 111, the sixth air inlet F3 of the second air control valve 23 is connected to the fourth air outlet F4 to unload the load of the commutation cavity, so that the air control commutation valve 21 resets and commutates. The unloading can facilitate the commutation of the air control commutation valve 21 again after the first air control valve 22 is triggered and opened by the cylinder piston 111 to realize circulation, can reduce the resistance of the spool commutation of the air control commutation valve 21, thus avoiding the jamming during the commutation of the air control commutation valve 21 and avoiding the situation that the air control commutation valve 21 stops in the middle position.

[0049] It should be noted that in the description of the present utility model, the terms indicating the direction or position relationship such as "up", "down", "left", "right", "inside", "outside", etc. are based on the direction or position relationship shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0050] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0051] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model 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; characterized in that: The pneumatically controlled reversing valve comprises a pneumatically controlled reversing port Y; The third air outlet F2 of the first air-controlled valve, the sixth air inlet F3 of the second air-controlled valve, and the air-controlled reversing port Y are connected to form a reversing cavity; After the first air-controlled valve is triggered and opened by the cylinder piston, the fifth air inlet F1 of the first air-controlled valve is connected to the third air outlet F2, and loads are applied to the reversing chamber to push the air-controlled reversing valve to perform reversing; After the second air-controlled valve is triggered and opened by the cylinder piston, the sixth air inlet F3 of the second air-controlled valve is connected to the fourth air outlet F4, and the load of the reversing chamber is removed to reset and reverse the air-controlled reversing valve.

2. An energy-saving hydraulic station according to claim 1, characterized in that: The fifth air inlet F1 of the first air-controlled valve is connected to the air source. After the first air-controlled valve is triggered and opened by the cylinder piston, the gas enters from the fifth air inlet F1, flows through the third air outlet F2 and enters the reversing cavity for loading, so that the gas flows into the air-controlled reversing port Y and pushes the air-controlled reversing valve to switch direction.

3. An energy-saving hydraulic station according to claim 2, characterized in that: The pneumatic control reversing valve further includes: an exhaust port, a first air outlet A and a second air outlet B respectively connected to a third air inlet C and a fourth air inlet D of the pneumatic cylinder; the third air inlet C is connected to a second cylinder cavity of the pneumatic cylinder, and the second cylinder cavity and the first air control valve are arranged on the same side of the cylinder piston; the fourth air inlet D is connected to the first cylinder cavity of the pneumatic cylinder, and the first cylinder cavity and the second air control valve are arranged on the same side of the cylinder piston; Gas flows in from the air-controlled reversing port Y and pushes the air-controlled reversing valve to reverse, connecting the second air outlet B with the first air inlet P, and connecting the first air outlet A and the exhaust port of the air-controlled reversing valve, so that the fourth air inlet D is inlet and the third air inlet C is exhausted, so as to push the cylinder piston to move toward the side where the first cylinder cavity connected to the third air inlet C is located. When there is a gap between the cylinder piston and the first air-controlled valve, the first air-controlled valve is reset to disconnect the fifth air inlet F1 and the third air outlet F2. With the intake of air from the fourth air inlet D, the cylinder piston continues to move toward the side where the second cylinder cavity is located until it moves into place, and the cylinder piston pushes the second air-controlled valve to trigger and open the second air-controlled valve.

4. An energy-saving hydraulic station according to any one of claims 1 to 3, characterized in that: The fourth air outlet F4 of the second air-controlled valve is connected to the outside. After the second air-controlled valve is triggered and opened by the cylinder piston, the sixth air inlet F3 of the second air-controlled valve is connected to the fourth air outlet F4, and the gas in the reversing chamber flows into the second air-controlled valve from the sixth air inlet F3 and flows out from the fourth air outlet F4 to unload the load of the reversing chamber.

5. An energy-saving hydraulic station according to claim 4, characterized in that: The pneumatic control reversing valve further includes: an exhaust port, a first air outlet A and a second air outlet B respectively connected to a third air inlet C and a fourth air inlet D of the pneumatic cylinder; the third air inlet C is connected to a second cylinder cavity of the pneumatic cylinder, and the second cylinder cavity and the first air control valve are arranged on the same side of the cylinder piston; the fourth air inlet D is connected to the first cylinder cavity of the pneumatic cylinder, and the first cylinder cavity and the second air control valve are arranged on the same side of the cylinder piston; After the gas in the reversing chamber flows out from the fourth air outlet F4, the air-controlled reversing valve can reset and reverse, connecting the first air outlet A and the first air inlet P, and connecting the second air outlet B and the exhaust port of the air-controlled reversing valve, so that the third air inlet C is inlet and the fourth air inlet D is exhausted, pushing the cylinder piston to move toward the side of the second cylinder cavity connected to the fourth air inlet D, and when there is a gap between the cylinder piston and the second air-controlled valve, the second air-controlled valve resets and disconnects the sixth air inlet F3 and the fourth air outlet F4; with the intake of air from the third air inlet C, the cylinder piston continues to move toward the side of the second cylinder cavity until it moves into place, and the cylinder piston pushes the first air-controlled valve, so that the first air-controlled valve is touched and opened by the cylinder piston.

6. The energy-saving hydraulic station according to claim 4, characterized in that: A muffler is provided at the fourth air outlet F4 of the second air-controlled valve.

7. An energy-saving hydraulic station according to any one of claims 1 to 3, characterized in that: The air-controlled reversing valve is a two-position five-way valve having two exhaust ports, namely a first exhaust port R and a second exhaust port S. When the first exhaust port A is connected to the first air inlet P, the second exhaust port B is connected to the second exhaust port S; when the second air outlet B is connected to the first air inlet P, the first air outlet A is connected to the first exhaust port R.

8. An energy-saving hydraulic station according to any one of claims 1 to 3, characterized in that: A first return spring is provided between the valve core and the valve body of the first air-controlled valve, and is used to apply a return force to the valve core of the first air-controlled valve when there is a gap between the cylinder piston and the valve core of the first air-controlled valve, so as to achieve the return of the valve core of the first air-controlled valve.

9. An energy-saving hydraulic station according to any one of claims 1 to 3, characterized in that: A second return spring is provided between the valve core and the valve body of the second air-controlled valve, which is used to apply a return force to the valve core of the second air-controlled valve when there is a gap between the cylinder piston and the valve core of the second air-controlled valve, so as to achieve the return of the valve core of the second air-controlled valve.

10. An energy-saving hydraulic station according to any one of claims 1 to 3, characterized in that: A third reset spring is provided between the valve core and the valve body of the air-controlled reversing valve, which is used to apply a reset force to the valve core of the air-controlled reversing valve when the air-controlled reversing port is exhausted, so as to reset and reverse the valve core of the air-controlled reversing valve.

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