Pneumatic control reversing valve and energy-saving hydraulic station with pneumatic control reversing valve

Abstract

The utility model provides a pneumatic operated directional valve and an energy-saving hydraulic station with the pneumatic operated directional valve. The pneumatic control valve shell and the pneumatic control valve element are included. The pneumatic control valve element is arranged in the pneumatic control valve shell in the length direction of the pneumatic control valve shell in a sliding mode. The pneumatic control valve shell is provided with an air inlet P, a first air outlet A, a second air outlet B, an exhaust port R, a pneumatic control loading port Y1 and a pneumatic control unloading port Y2. After the forward sliding side of the pneumatic control valve element is unloaded through the pneumatic control unloading port Y2, the air inlet P injects air into the reverse sliding side of the pneumatic control valve element, and the pneumatic control valve element can slide in the pneumatic control valve shell in the forward direction. The pneumatic control loading port Y1 and the pneumatic control unloading port Y2 are used for loading and unloading the forward sliding side of the pneumatic control valve element respectively, the stability and continuity of reverse sliding of the pneumatic control valve element can be achieved through loading, the resistance of forward sliding of the pneumatic control valve element can be reduced through unloading, and therefore the pneumatic control valve element is prevented from being clamped and stopped in the reversing process, and the reversing stability of the pneumatic control valve element is improved. And the situation that the pneumatic control valve element stops at the middle position is avoided.

Description

Technical Field

[0001] The utility model relates to a hydraulic station, in particular to a pneumatically controlled reversing valve and an energy-saving hydraulic station with the pneumatically controlled reversing valve. Background Technique

[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 a pneumatically controlled reversing valve, 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 pneumatically controlled 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 pneumatically controlled reversing valve 29'; the pneumatically controlled 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 pneumatically controlled reversing valve 29' through a first gas source circuit 30' to control the pneumatically controlled reversing valve 29' to activate the A' air outlet; the second pneumatic control valve 28' is connected to the pneumatically controlled reversing valve 29' through a second gas source circuit 31' to control the pneumatically controlled reversing valve 29' to activate the B' air outlet.

[0004] The working process of the above pneumatically controlled reversing valve is as follows: The pneumatic piston is located on the left side inside the pneumatic cylinder 10', triggering the first pneumatically controlled valve 27' to open. The first air source circuit 30' pushes the pneumatically controlled reversing valve 29'. 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 pneumatically controlled valve 27' resets and cuts off). It drives the cylinder pistons in the two sides of the oil cylinders 11' to move to the right. A negative pressure is formed in the left oil cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the oil cylinder 11' through its connected oil inlet pipeline, inlet liquid check valve and inlet and outlet liquid plate; the hydraulic oil in the right oil 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 pneumatically controlled valve 28' to open. The second air source circuit 31' pushes the pneumatically controlled reversing valve 29'. 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 pneumatically controlled valve 28' resets and cuts off). It drives the cylinder pistons in the two sides of the oil cylinders 11' to move to the left. A negative pressure is formed in the right oil cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the oil cylinder 11' through its connected oil inlet pipeline, inlet liquid check valve and inlet and outlet liquid plate; the hydraulic oil in the left oil 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. The pneumatic cylinder 10' remains in 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 pneumatically controlled reversing valve, the first pneumatically controlled valve 27' and the second pneumatically controlled valve 28' need to be connected to the air source. After one of the pneumatically controlled valves is triggered to open, the gas in the air source flows through this pneumatically controlled valve and then flows into the pneumatically controlled reversing valve 29', pushing the pneumatically controlled reversing valve 29' to perform commutation on the corresponding side. As a result, the two-way commutation of the pneumatically controlled 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 spool to stop in the middle position, that is, neither the A' air outlet nor the B' air outlet of the pneumatically controlled 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 a stuck stop, the tooling loses pressure, resulting in problems such as the workpiece not being clamped tightly and tool hitting. Even if an energy storage tank is used, when the tooling uses hydraulic pressure again, after draining 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 hitting. Utility Model Content

[0006] The technical problem to be solved by the present utility model is to provide a pneumatically controlled reversing valve that will not have a stuck stop on both sides and an energy-saving hydraulic station with such a pneumatically controlled reversing valve.

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

[0008] On the one hand, the present utility model proposes a pneumatically controlled reversing valve, which includes a pneumatically controlled valve housing and a pneumatically controlled valve core; wherein, the pneumatically controlled valve core is arranged inside the pneumatically controlled valve housing in a slidable manner along the length direction of the pneumatically controlled valve housing; the pneumatically controlled valve housing is provided with an air inlet P, a first air outlet A, a second air outlet B, an exhaust port R, a pneumatic loading port Y1, and a pneumatic unloading port Y2, and the pneumatic loading port Y1 and the pneumatic unloading port Y2 are respectively used for loading and unloading the forward sliding side of the pneumatically controlled valve core; after the forward sliding side of the pneumatically controlled valve core is unloaded through the pneumatic unloading port Y2, the air inlet P injects air into the reverse sliding side of the pneumatically controlled valve core, and the pneumatically controlled valve core can slide forward in the pneumatically controlled valve housing until it slides forward to the first limit position. At this time, the air inlet P is communicated with the first air outlet A, the second air outlet B is communicated with the exhaust port R, and the first air outlet A is disconnected from the exhaust port R, so as to inject air into the cavity communicated with the first air outlet A through the first air outlet A as the air inlet, and the second air outlet B is used as the exhaust port R to exhaust the cavity communicated with the second air outlet B; when the forward sliding side of the pneumatically controlled valve core is loaded through the pneumatic loading port Y1, the pneumatically controlled valve core can slide backward in the pneumatically controlled valve housing until it slides backward to the second limit position. At this time, the air inlet P is communicated with the second air outlet B, the second air outlet B is disconnected from the exhaust port R, and the first air outlet A is communicated with the exhaust port R, so as to inject air into the cavity communicated with the second air outlet B through the second air outlet B as the air inlet, and the first air outlet A is used as the exhaust port R to exhaust the cavity communicated with the first air outlet A.

[0009] Further, for the above pneumatically controlled reversing valve, the pneumatically controlled valve housing includes a valve housing body, a lining sleeve, and a plug; wherein, the valve housing body is a cylindrical structure with one end open and the other end closed; the lining sleeve is sleeved inside the valve housing body, and the plug is arranged at the open end of the valve housing body for limiting and blocking the lining sleeve.

[0010] Further, for the above pneumatically controlled reversing valve, the inside of the lining sleeve is provided with a first sliding section and a second sliding section; the pneumatically controlled valve core is adapted to the first sliding section, the first end of the pneumatically controlled valve core is slidably arranged inside the first sliding section, and a first pneumatically controlled reversing cavity can be formed between the first end of the pneumatically controlled valve core and the blocking end of the valve housing body inside the first sliding section. The second end of the pneumatically controlled valve core is provided with a sliding plate adapted to the second sliding section, the sliding plate is slidably arranged inside the second sliding section, and a second pneumatically controlled reversing cavity can be formed between the sliding plate and the plug inside the second sliding section.

[0011] Further, for the above pneumatically controlled directional valve, the cross-sectional area of the second sliding section is larger than that of the first sliding section.

[0012] Further, for the above pneumatically controlled directional valve, the first air outlet A, the second air outlet B, and the exhaust port R are all arranged on the valve housing body. The inner lining sleeve is provided with a first inner lining port I, a second inner lining port G, and a third inner lining port H, which are respectively communicated with the first air outlet A, the exhaust port R, and the second air outlet B; a first cut-off limit plate is provided at the first end of the pneumatically controlled valve core. On one side of the first cut-off limit plate of the pneumatically controlled valve core, there is also a second cut-off limit plate. An outer peripheral switching channel is arranged circumferentially between the first cut-off limit plate and the second cut-off limit plate of the pneumatically controlled valve core; when the pneumatically controlled valve core slides forward in the inner lining sleeve to the first extreme position, the first cut-off limit plate is located between the first inner lining port I and the second inner lining port G, and the first inner lining port I is completely opened, cutting off the first inner lining port I and the second inner lining port G to cut off the first air outlet A and the exhaust port R. The second inner lining port G and the third inner lining port H are both communicated with the outer peripheral switching channel to realize the second inner lining port G and the third inner lining port H through the outer peripheral switching channel, and further realize the communication between the exhaust port R and the second air outlet B; when the pneumatically controlled valve core slides backward in the inner lining sleeve to the second extreme position, the first cut-off limit plate is placed on the side of the first inner lining port I facing away from the second inner lining port G and presses against the sealing end of the valve housing body. The second cut-off limit plate is arranged between the second inner lining port G and the third inner lining port H to cut off the second inner lining port G and the third inner lining port H, and further cut off the exhaust port R and the second air outlet B. The first inner lining port I and the second inner lining port G are both communicated with the outer peripheral switching channel to realize the communication between the first inner lining port I and the second inner lining port G through the outer peripheral switching channel, and further realize the communication between the first air outlet A and the exhaust port R.

[0013] Further, for the above pneumatically controlled directional valve, the air inlet P is arranged on the closed end of the valve housing body and is used to inject air into the reverse sliding side of the pneumatically controlled valve core. After the forward sliding side of the pneumatically controlled valve core is unloaded, the gas entering from the air inlet P can apply a forward sliding force to the pneumatically controlled valve core, so that the pneumatically controlled valve core can slide forward.

[0014] Furthermore, for the above pneumatically controlled directional valve, the pneumatically controlled loading port Y1 is arranged on the valve housing body and is used to connect the air inlet F1 of the first pneumatically controlled valve and the air source respectively; the plug cover is provided with a pneumatically controlled directional port for communicating with the air outlet F2 of the first pneumatically controlled valve; the valve housing body is further provided with a pneumatically controlled unloading port Y2 which is communicated with the pneumatically controlled directional port, and the pneumatically controlled unloading port Y2 is used to connect the air inlet F3 of the second pneumatically controlled valve, and the air outlet F4 of the second pneumatically controlled valve is communicated with the outside; when the first pneumatically controlled valve is opened and the air inlet F1 of the first pneumatically controlled valve and the air outlet F2 of the first pneumatically controlled valve are communicated, the compressed gas can flow through the pneumatically controlled loading port Y1, the air inlet F1 of the first pneumatically controlled valve, the first pneumatically controlled valve, the air outlet F2 of the first pneumatically controlled valve, the pneumatically controlled directional port in sequence, and is discharged from the pneumatically controlled directional port to the forward sliding side of the pneumatically controlled valve core, so as to realize the gas injection and loading of the forward sliding side of the pneumatically controlled valve core; when the second pneumatically controlled valve is opened and the air inlet F3 of the second pneumatically controlled valve and the air outlet F4 of the second pneumatically controlled valve are communicated, the compressed gas on the forward sliding side of the pneumatically controlled valve core can flow through the pneumatically controlled directional port, the pneumatically controlled unloading port Y2, the air inlet F3 of the second pneumatically controlled valve, the second pneumatically controlled valve, the air outlet F4 of the second pneumatically controlled valve in sequence, and is discharged from the air outlet F4 of the second pneumatically controlled valve, so as to realize the exhaust and unloading of the forward sliding side of the pneumatically controlled valve core.

[0015] Furthermore, for the above pneumatically controlled directional valve, an air passage is arranged on the pneumatically controlled valve core, and its air inlet is arranged on the first end face of the pneumatically controlled valve core and is used to communicate with the air inlet P; an air vent communicated with the air passage is arranged on the outer peripheral side wall of the pneumatically controlled valve core. When the pneumatically controlled valve core slides reversely to the second limit position, the air vent is communicated with the second air outlet B, and the air inlet of the air passage is communicated with the air inlet P, so as to realize the communication between the air inlet P and the second air outlet B.

[0016] Furthermore, for the above pneumatically controlled directional valve, a breathing groove is formed between the two ends of the pneumatically controlled valve core and close to the second end of the pneumatically controlled valve core and the pneumatically controlled valve housing. A breathing port communicated with the breathing groove is arranged on the pneumatically controlled valve housing and is used to communicate with the outside, so as to inhale and discharge gas at the breathing groove when the pneumatically controlled valve core slides.

[0017] The pneumatically controlled directional valve provided by the present utility model unloads the forward sliding side of the pneumatically controlled valve core through the pneumatic unloading port Y2. When air is injected from the air inlet P to the reverse sliding side of the pneumatically controlled valve core, the pneumatically controlled valve core can slide forward in the pneumatically controlled valve housing until it slides forward to the first limit position. At this time, the air inlet P is communicated with the first air outlet A, the second air outlet B is communicated with the exhaust port R, and the first air outlet A is disconnected from the exhaust port R, so as to inject air into the cavity communicated with the first air outlet A through the first air outlet A as the air inlet, and exhaust the air from the cavity communicated with the second air outlet B through the second air outlet B as the exhaust port R; and load the forward sliding side of the pneumatically controlled valve core through the pneumatic loading port Y1, so that the pneumatically controlled valve core can slide backward in the pneumatically controlled valve housing until it slides backward to the second limit position. At this time, the air inlet P is communicated with the second air outlet B, the second air outlet B is disconnected from the exhaust port R, and the first air outlet A is communicated with the exhaust port R, so as to inject air into the cavity communicated with the second air outlet B through the second air outlet B as the air inlet, and exhaust the air from the cavity communicated with the first air outlet A through the first air outlet A as the exhaust port R. Therefore, in this energy-saving hydraulic station and the pneumatically controlled directional valve, the pneumatic loading port Y1 and the pneumatic unloading port Y2 are respectively used to load and unload the forward sliding side of the pneumatically controlled valve core. Through loading, the stability and continuity of the reverse sliding of the pneumatically controlled valve core can be achieved, and through unloading, the resistance of the forward sliding of the pneumatically controlled valve core can be reduced, thereby avoiding the jamming of the pneumatically controlled valve core during the commutation process and avoiding the situation that the pneumatically controlled valve core stops in the middle position.

[0018] On the other hand, the present utility model also proposes an energy-saving hydraulic station, and this energy-saving hydraulic station is provided with the above-mentioned pneumatically controlled directional valve.

[0019] Since the pneumatically controlled directional valve has the above effects, the energy-saving hydraulic station with this pneumatically controlled directional valve also has corresponding technical effects. Description of the Drawings

[0020] By reading the detailed description of the preferred embodiments below, 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 utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 is a structural schematic diagram of a pneumatically controlled directional valve in the prior art;

[0022] Figure 2 is a structural schematic diagram of the energy-saving hydraulic station provided by the embodiment of the present utility model;

[0023] Figure 3The structural schematic diagram showing the internal structure of the pneumatic control reversing valve provided by the embodiment of the present utility model;

[0024] Figure 4 The structural schematic diagram of the pneumatic control reversing valve moving to the first extreme position provided by the embodiment of the present utility model;

[0025] Figure 5 The structural schematic diagram of the pneumatic control reversing valve moving to the second extreme position provided by the embodiment of the present utility model;

[0026] Figure 6 The structural schematic diagram of the pneumatic control valve housing in the pneumatic control reversing valve provided by the embodiment of the present utility model;

[0027] Figure 7 The front view of the valve housing body provided by the embodiment of the present utility model;

[0028] Figure 8 The top view of the valve housing body provided by the embodiment of the present utility model;

[0029] Figure 9 The rear view of the valve housing body provided by the embodiment of the present utility model;

[0030] Figure 10 The structural schematic diagram of the inner lining sleeve provided by the embodiment of the present utility model;

[0031] Figure 11 The structural schematic diagram of the plug provided by the embodiment of the present utility model;

[0032] Figure 12 The structural schematic diagram of the pneumatic control valve core provided by the embodiment of the present utility model. Detailed implementation manners

[0033] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail 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 conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. Hereinafter, the present utility model will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0034] See Figure 2 And Figure 3, which shows a schematic structural diagram of an energy-saving hydraulic station provided by an embodiment of the present utility model. As shown in the figure, the energy-saving hydraulic station includes: a gas-liquid boosting pump 1 and a control valve group 2 for controlling the commutation of the gas-liquid boosting pump 1; the gas-liquid boosting 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.

[0035] 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 in contact with the inner wall is arranged in the pneumatic cylinder 11, and an oil cylinder piston in contact with the inner wall is arranged 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, 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, and no limitation is made to it in this embodiment. In this embodiment, 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 pressure. For example, if the piston area of the cylinder piston 111 is 6 times the piston area of the oil cylinder piston, then 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 2 the right side and the left side shown) respectively form a first cylinder cavity 112 and a second cylinder cavity 113. By injecting and exhausting air through the first cylinder cavity 112 and the second cylinder cavity 113 respectively, that is, by pneumatic control to control the position of the cylinder piston 111, the oil cylinder 12 is driven to act, and the corresponding hydraulic drive execution action is realized. In this embodiment, two cavity air inlets are provided on the pneumatic cylinder 11, which are respectively communicated with the first cylinder cavity 112 and the second cylinder cavity 113 to respectively control the air intake and exhaust of the first cylinder cavity 112 and the second cylinder cavity 113.

[0036] In this embodiment, on one side of the oil cylinder 12 (such as Figure 3 the left side cavity shown) is connected with an oil inlet check valve 121 and an oil outlet check valve 122. 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 cavity on this side intakes and discharges oil, it can intake and discharge oil through the pipeline where the corresponding check valve is located.

[0037] Continue to refer to Figures 3 to 5 , the pneumatic control reversing valve 21 includes: a pneumatic control valve housing 211 and a pneumatic control valve core 212; wherein,

[0038] the pneumatic control valve core 212 is along the length direction of the pneumatic control valve housing 211 (such asFigure 2 The air control valve housing 211 is provided with a sliding cavity in the air control valve housing 211. Specifically, the air control valve housing 211 may have a sliding cavity, the cross section of the sliding cavity is adapted to the cross section of the air control valve core 212, and the length is greater than the length of the air control valve core 212, so that the air control valve core 212 can slide in the longitudinal direction in the sliding cavity, thereby realizing the switching. In this embodiment, a plurality of sealing rings 7 may be provided between the air control valve housing 211 and the air control valve core 212.

[0039] like Figure 4 , Figure 5 , Figure 8 As shown, the air control valve housing 211 is provided with an air inlet P, a first air outlet A, a second air outlet B, an exhaust port R, an air control loading port Y1, and an air control unloading port Y2. The air control loading port Y1 and the air control unloading port Y2 are respectively used to control the positive sliding side (such as Figure 4 Specifically, the pneumatically controlled reversing valve 21 may be a two-position four-way valve, having an air inlet P, a first air outlet A, a second air outlet B, and an exhaust port R. In this embodiment, the first air outlet A may be connected to the first cylinder cavity 112, that is, connected to the cavity air inlet and exhaust port corresponding to the first cylinder cavity 112, and the second air outlet B may be connected to the second cylinder cavity 113, that is, connected to the cavity air inlet and exhaust port corresponding to the second cylinder cavity 113. In this embodiment, as Figure 2 As shown, the first air outlet A can be connected to the first cylinder cavity 112 through the air cavity connecting pipeline 5. In order to facilitate the switching of the two positions of the air-controlled reversing valve 21, preferably, the air-controlled loading port Y1 can be used as an air inlet, and the air-controlled unloading port Y2 can be used as an air outlet to load or unload part of the cavity on the positive sliding side of the air-controlled valve core 212 in the sliding cavity. In this embodiment, the air-controlled reversing valve 22 is installed on the cylinder end cover on the left side of the pneumatic cylinder 11, that is, the air-controlled valve housing 211 can be fixedly installed on the cylinder end cover on the left side of the pneumatic cylinder 11, and the first air outlet A can be connected to the air inlet and outlet ports on the cylinder end cover on the left side of the pneumatic cylinder 11 to perform air intake and exhaust on the first cylinder cavity 112.

[0040] The positive sliding side of the air control valve core 212 (such as Figure 5 After the air inlet P is unloaded through the air control unloading port Y2, the air inlet P moves toward the reverse sliding side of the air control valve core 212 (as shown in FIG. Figure 5 The air control valve core 212 can slide forward in the air control valve housing 211 (as shown on the right side) to inject air. Figure 5 Slide leftward as shown) until it slides forward to the first limit position. Figure 5As shown, the intake port P is in communication with the first outlet port A, the second outlet port B is in communication with the exhaust port R, and the first outlet port A is disconnected from the exhaust port R. The cavity connected to the first outlet port A is filled with gas through the first outlet port A as the intake port, and the cavity connected to the second outlet port B is exhausted through the second outlet port B as the exhaust port R.

[0041] Specifically, after the forward sliding side of the pneumatic control valve core 212 (such as the left side shown) is unloaded through the pneumatic control unloading port Y2, part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity is exhausted and unloaded. The intake port P can be placed at the right end of the sliding cavity, that is, on the solid part at the right end of the sliding cavity on the pneumatic control valve housing 211, and the reverse sliding side of the pneumatic control valve core 212 can be filled with gas. Since the forward sliding side of the pneumatic control valve core 212 has been unloaded, the intake port P fills the reverse sliding side of the pneumatic control valve core 212 to apply a driving force for forward sliding to the pneumatic control valve core 212, so that the pneumatic control valve core 212 slides forward under the action of air pressure, that is, slides to the left until the pneumatic control valve core 212 slides to the left end, that is, the first limit position, in the sliding cavity. The pneumatic control valve core 212 is limited to the first limit position through the pneumatic control valve housing 211. At this time, when the pneumatic control valve core 212 slides to the first limit position in the sliding cavity, as Figure 4 shown, the intake port P is in communication with the first outlet port A, the second outlet port B is in communication with the exhaust port R, and the first outlet port A is disconnected from the exhaust port R. The cavity connected to the first outlet port A is filled with gas through the first outlet port A as the intake port, and the second outlet port B is used as the exhaust port to exhaust the cavity connected to the second outlet port B, that is, the first cylinder cavity 112 intakes gas, the second cylinder cavity 113 exhausts gas, and the cylinder piston 111 moves Figure 5 to the left side shown, that is, moves to the left, to drive the piston of the oil cylinder 12 to move to the left accordingly, and then the oil in the left cavity of the oil cylinder 12 flows out, and the hydraulic oil flows upward and flows out upward after passing through the oil outlet check valve 122. Figure 3 shown, the intake port P is in communication with the first outlet port A, the second outlet port B is in communication with the exhaust port R, and the first outlet port A is disconnected from the exhaust port R. The cavity connected to the first outlet port A is filled with gas through the first outlet port A as the intake port, and the second outlet port B is used as the exhaust port to exhaust the cavity connected to the second outlet port B, that is, the first cylinder cavity 112 intakes gas, the second cylinder cavity 113 exhausts gas, and the cylinder piston 111 moves

[0042] When the pneumatic control loading port Y1 loads the forward sliding side of the pneumatic control valve core 212, the pneumatic control valve core 212 can slide reversely in the pneumatic control valve housing 211 until it slides reversely to the second limit position. At this time, the intake port P is in communication with the second outlet port B, the second outlet port B is disconnected from the exhaust port R, and the first outlet port A is in communication with the exhaust port R. The cavity connected to the second outlet port B is filled with gas through the second outlet port B as the intake port, and the first outlet port A is used as the exhaust port to exhaust the cavity connected to the first outlet port A.

[0043] Specifically, when the first cylinder cavity 112 intakes gas and the second cylinder cavity 113 exhausts gas, and the cylinder piston 111 moves to the left end, in order to achieve commutation, the pneumatic control loading port Y1 can be used to load the forward sliding side of the pneumatic control valve core (such as Figure 4It is loaded on the left side as shown (i.e., the pneumatic control loading port Y1 can inject gas into a part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity. The gas injection loading will apply a loading force to the right to the pneumatic control valve core 212. The loading force is greater than the gas pressure on the reverse sliding side of the pneumatic control valve core 212, causing the pneumatic control valve core 212 to slide reversely, i.e., slide to the right, until the pneumatic control valve core 212 slides to the right end in the sliding cavity, i.e., the second limit position. The pneumatic control valve housing 211 limits the pneumatic control valve core 212 in the second limit position. At this time, when the pneumatic control valve core 212 slides to the second limit position in the sliding cavity, as Figure 4 shown, the air inlet P is communicated with the second air outlet B, the second air outlet B is disconnected from the exhaust port R and communicated with the first air outlet A, so as to inject gas into the cavity communicated with the second air outlet B through the second air outlet B as the air inlet, and exhaust the cavity communicated with the first air outlet A through the first air outlet A as the exhaust port R, that is, the first cylinder cavity 112 discharges air, the second cylinder cavity 113 intakes air, and the cylinder piston 111 moves Figure 3 to the right side as shown, i.e., moves to the right, to drive the piston of the oil cylinder 12 to move to the right accordingly, and further causes the left cavity of the oil cylinder 12 to intake oil, and the outside flows through the self-priming check valve 121 from bottom to top and then flows into the left cavity of the oil cylinder. Among them, when the first cylinder cavity 112 discharges air, the second cylinder cavity 113 intakes air, and the cylinder piston 111 moves to the right end, in order to realize commutation, the forward sliding side of the pneumatic control valve core 212 (such as Figure 4 the left side as shown) can be unloaded, and the air intake of the air inlet P can directly push the pneumatic control valve core 212 to slide forward.

[0044] In this embodiment, the pneumatic control loading port Y1 is used to connect to the first pneumatic control valve, and is communicated with the air outlet F2 or the air inlet F1 of the first pneumatic control valve 22, and is used to inject gas into the forward sliding side of the pneumatic control valve core after the first pneumatic control valve 22 is triggered to open. The pneumatic control unloading port Y2 can be communicated with the air inlet F3 of the second pneumatic control valve 23, and the air outlet F4 of the second pneumatic control valve 23 is communicated with the outside, and is used to exhaust and unload the forward sliding side of the pneumatic control valve core after the second pneumatic control valve 23 is triggered to open, so as to realize the control of the commutation of the pneumatic control reversing valve through the first pneumatic control valve 22 and the second pneumatic control valve 23.

[0045] Specifically, two pneumatic control connection ports are provided on the pneumatic control valve housing 211, namely a pneumatic control valve inlet J and a pneumatic control valve outlet K, which are used to connect the inlet F1 and the outlet F2 of the first pneumatic control valve 22 respectively. The pneumatic control valve inlet J is communicated with the pneumatic control loading port Y1, the pneumatic control valve inlet J is communicated with the inlet F1 of the first pneumatic control valve 22, and the pneumatic control loading port Y1 is in parallel with the gas injection port P and both are connected to the gas source. The pneumatic control valve outlet K is communicated with the forward sliding side of the pneumatic control valve core 212, and the pneumatic control valve outlet K is communicated with the outlet F2 of the first pneumatic control valve 22. So that after the first pneumatic control valve 22 is triggered to open, the inlet F1 and the outlet F2 of the first pneumatic control valve 22 are communicated to inject gas through the gas source. The gas sequentially passes through the pneumatic control loading port Y1, the pneumatic control valve inlet J, the inlet F1 of the first pneumatic control valve 22, the first pneumatic control valve 22, the outlet F2 of the first pneumatic control valve 22, and the pneumatic control valve outlet K, and is injected into the forward sliding side of the pneumatic control valve core 212, that is, into the second pneumatic control commutation cavity 214, to realize the gas injection loading of the forward sliding side of the pneumatic control valve core 212, that is, the second pneumatic control commutation cavity 214. And after the first pneumatic control valve 22 is closed and the second pneumatic control valve 23 is triggered to open, the gas on the forward sliding side of the pneumatic control valve core 212 can sequentially pass through the pneumatic control unloading port Y2, the commutation connection pipeline 6, the inlet F3 of the second pneumatic control valve 23, the outlet F4 of the second pneumatic control valve 23, and is discharged from the outlet F4 of the second pneumatic control valve 23, to realize the exhaust unloading of the forward sliding side of the pneumatic control valve core 212, that is, the second pneumatic control commutation cavity 214.

[0046] Continue to refer to Figures 2 to 5 , when the cylinder piston 111 slides to the left end, the first pneumatic control valve 22 is triggered to open, so that the first pneumatic control valve 22 opens and communicates the inlet F1 and the outlet F2 of the first pneumatic control valve. At the same time, the second pneumatic control valve 23 is in a closed state, that is, the inlet F3 and the outlet F4 of the second pneumatic control valve 23 are disconnected. At this time, the inlet F1 of the first pneumatic control valve 22 is connected to the gas source, and gas is injected into the pneumatic control loading port Y1 through the outlet F2 of the first pneumatic control valve 22, and gas injection loading is carried out on a part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity, so that the pneumatic control valve core 212 slides reversely under the action of the loading force until the pneumatic control valve core 212 slides to the second limit position in the sliding cavity. At this time, the second outlet B serves as the inlet of the second cylinder cavity 113, and the first outlet A serves as the exhaust port of the first cylinder cavity 112, so that the first cylinder cavity 112 discharges gas and the second cylinder cavity 113 intakes gas, and the cylinder piston 111 moves Figure 2 to the right as shown, after the cylinder piston 111 moves to the right, the first pneumatic control valve 22 automatically switches to the closed state, that is, the inlet F1 and the outlet F2 of the first pneumatic control valve are disconnected, and the gas injection loading in a part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity stops.

[0047] Continue to refer to Figures 2 to 5 , the cylinder piston 111 moves to the right end, touches and opens the second pneumatic control valve 23, so that the second pneumatic control valve 23 is opened and the air inlet F3 and the air outlet F4 of the second pneumatic control valve 23 are connected. At this time, a part of the cavity on the positive sliding side of the pneumatic control valve core 212 in the sliding cavity flows into the second pneumatic control valve 23 through the pneumatic unloading port Y2 and the air inlet F3 of the second pneumatic control valve 23, and is exhausted through the air outlet F4 of the second pneumatic control valve 23. That is to say, the part of the cavity on the positive sliding side of the pneumatic control valve core 212 in the sliding cavity is unloaded and exhausted. At the same time, since the air inlet P is connected to the air source, the air injection at the air inlet P can make the pneumatic control valve core 212 slide forward under the action of air pressure until the pneumatic control valve core 212 slides to the first limit position in the sliding cavity. At this time, the first air outlet A serves as the air inlet of the first cylinder cavity 112, and the second air outlet B serves as the exhaust port of the second cylinder cavity 113, so that the first cylinder cavity 112 intakes air and the second cylinder cavity 113 exhausts air. The cylinder piston 111 moves to the left. After the cylinder piston 111 moves to the left, the second pneumatic control valve 23 automatically switches to the closed state, that is, the connection between the air inlet F3 and the air outlet F4 of the second pneumatic control valve 23 is disconnected, and the unloading and exhaust of the part of the cavity on the positive sliding side of the pneumatic control valve core 212 in the sliding cavity stops.

[0048] Continue to refer to Figure 4 and Figure 5 , when there is a gap between the end face of the reverse sliding side of the pneumatic control valve core 212 (such as the right end face shown in Figure 5 ) and the corresponding end of the pneumatic control valve housing 211 (such as the right end shown in Figure 5 ), the part of the sliding cavity between the end face of the reverse sliding side of the pneumatic control valve core 212 and the corresponding end of the pneumatic control valve housing 211 is used as the first pneumatic control reversing cavity 213. When there is a gap between the end face of the positive sliding side of the pneumatic control valve core 212 (such as the left end face shown in Figure 4 ) and the corresponding end of the pneumatic control valve housing 211 (such as the left end shown in Figure 4 ), the part of the sliding cavity between the end face of the positive sliding side of the pneumatic control valve core 212 and the corresponding end of the pneumatic control valve housing 211 is used as the second pneumatic control reversing cavity 214.

[0049] Specifically, the first pneumatic control reversing cavity 213 can be inflated through the air injection port P, and the second pneumatic control reversing cavity 214 can be inflated and loaded and exhausted and unloaded through the pneumatic control loading port Y1. In this embodiment, the cross-sectional area of the first pneumatic control reversing cavity 213 is smaller than that of the second pneumatic control reversing cavity 214, so that when the air pressure is the same, the force exerted by the gas in the second pneumatic control reversing cavity 214 on the pneumatic control valve core 212 is greater than the force exerted by the gas in the first pneumatic control reversing cavity 213 on the pneumatic control valve core 212, that is, the force on the second pneumatic control reversing cavity 214 side of the pneumatic control valve core 212 is greater than the force on the first pneumatic control reversing cavity 213 side. Furthermore, when the second pneumatic control reversing cavity 214 is inflated and loaded, that is, when the forward sliding side of the pneumatic control valve core is loaded, the gas in the second pneumatic control reversing cavity 214 can push the pneumatic control valve core 212 to slide reversely.

[0050] In this embodiment, a breathing groove 215 is formed between the two ends of the air hole valve core 212 and at a position close to the second end of the air hole valve core 212 (such as Figure 4 the left end shown). A breathing channel 216 communicating with the breathing groove 215 is provided on the pneumatic control valve housing 211 for communicating with the outside world, so as to inhale and exhale gas at the breathing groove 215 when the air hole valve core 212 slides, so as to avoid the resistance caused by the gas compression at the breathing groove 215 to the sliding of the air hole valve core 212. Specifically, due to the difference in the cross-sections of the first pneumatic control reversing cavity 213 and the second pneumatic control reversing cavity 214 on both sides of the air hole valve core 212, when the air hole valve core 212 slides, a breathing groove 215 will be formed between the air hole valve core 212 and the pneumatic control valve housing 211. In particular, as Figure 5 shown, when the air hole valve core 212 slides to the left end, there is a breathing groove 215 with a relatively large space between the air hole valve core 212 and the pneumatic control valve housing 211. As the air hole valve core 212 slides to the right, the space of the breathing groove 215 gradually decreases. If the breathing groove 215 is closed, the gas in the space will be gradually compressed, which will generate a resistance to prevent the air hole valve core 212 from sliding to the right. Therefore, in order to prevent the air hole valve core 212 from stopping in the middle position, in this embodiment, a breathing channel 216 communicating with the breathing groove 215 is provided on the pneumatic control valve housing 211 to communicate with the outside world, so that the breathing groove 215 is communicated with the outside world to form a space with an opening, and then the air can enter and exit with the change of the space of the breathing groove 215, avoiding the change of the air pressure in the breathing groove 215, and thus ensuring the smooth sliding of the air hole valve core 212.

[0051] See Figures 6 to 7 , which shows a schematic structural diagram of the pneumatic control valve housing and the valve housing body in the pneumatic control reversing valve provided by the embodiment of the present invention. As shown in the figure, the pneumatic control valve housing 211 includes: a valve housing body 2111, a lining sleeve 2112 and a plug 2113; wherein, the valve housing body 2111 is one end (such as Figure 7a cylindrical structure with an opening at the left end as shown, and the other end (such as Figure 7 the right end as shown) is a closed end; the inner lining sleeve 2112 is sleeved inside the valve housing body 2111, and the plug cover 2113 is arranged at the opening end of the valve housing body 2111 for limiting and blocking the inner lining sleeve 2112. Specifically, one end of the valve housing body 2111 is blocked and the other end is open, and there is a mounting hole communicated with the opening inside. The inner lining sleeve 2112 is placed in the mounting hole and arranged close to the closed end. The opening end has a plug cover 2113. The plug cover 2113 is partially placed in the mounting hole, and the end portion placed in the mounting hole abuts against the end portion of the inner lining sleeve 2112, which can seal the mounting hole and limit the inner lining sleeve 2112, so that the inner lining sleeve 2112 is fixed in the valve housing body 2111. Among them, the plug cover 2113 and the valve housing body 2111 can be fixedly connected by clamping or can also be fixedly connected by bolts. In this embodiment, no specific limitation is made on it. In this embodiment, the outer contour of the cross-section of the valve housing body 2111 can be a square structure, the mounting hole can be a circular blind hole structure, and the mounting hole is coaxially arranged with the valve housing body 2111. The inner lining sleeve 2112 can be a cylindrical structure, the outer wall abuts against the inner wall of the valve housing body 2111, and the hollow part inside and the closed end of the valve housing body 2111 and the plug cover 2113 enclose to form a slider cavity. In this embodiment, a plurality of sealing rings 7 can be provided between the valve housing body 2111 and the inner lining sleeve 2112.

[0052] Continue to refer to Figures 6 to 9 , as a housing structure, the valve housing body 2111 is provided with an air inlet P, a first air outlet A, a second air outlet B and an exhaust port R. In this embodiment, the air inlet P is arranged on the closed end of the valve housing body 2111 for injecting air into the reverse sliding side of the pneumatic control valve core 212, so that after the air on the forward sliding side of the pneumatic control valve core 212 is unloaded, the gas entering from the air inlet P can apply a forward sliding force to the pneumatic control valve core 212, so that the pneumatic control valve core 212 can slide forward. The air inlet P can be along the axial direction of the valve housing body 2111 (such as Figure 7It is arranged in the horizontal direction (as shown), and the air inlet P can also be coaxially arranged with the valve housing body 2111 to inject gas into the axial position inside the inner liner 2112, that is, inject gas along the axis of the pneumatic control valve core 212, which can apply a force to the axis position of the pneumatic control valve core 212 to improve the stability of the forward sliding of the pneumatic control valve core 212. Among them, the air inlet P can be a through hole penetrating the closed end of the valve housing body 2111, and the right end can be connected to the air source to inject gas into the air inlet P through the air source, and the left end can be communicated with the installation hole inside the valve housing body 2111 to be communicated with the sliding cavity inside the inner liner 2112, and then apply a force to the pneumatic control valve core 212 to push the pneumatic control valve core 212 to slide forward. Among them, the first air outlet A, the second air outlet B, and the exhaust port R can be arranged on three different sides of the valve housing body 2111, and the first air outlet A, the exhaust port R, and the second air outlet B are respectively through hole structures penetrating the side wall where they are located, so that the inner end is communicated with the corresponding internal structure and the outer end is connected to the corresponding connection port. A silencer can be provided at the exhaust port R.

[0053] Continue to refer to Figure 7 , the pneumatic control loading port Y1 and the pneumatic control unloading port Y2 can also be arranged on the valve housing body 2111. Specifically, the pneumatic control unloading port Y2 can be communicated with the pneumatic control loading port Y1, and both can be communicated with a part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity to realize the injection loading and exhaust unloading of a part of the cavity on the forward sliding side of the pneumatic control valve core 212 in the sliding cavity. Among them, as Figure 2 shown, the pneumatic control unloading port Y2 and the air inlet F3 of the second pneumatic control valve 23 can be communicated through a reversing connection pipeline 6, and the reversing connection pipeline 6 can be arranged in parallel with the air cavity connection pipeline 5, especially both can be arranged along the sliding direction of the cylinder piston 111 (such as Figure 2 shown in the horizontal direction). In this embodiment, the first pneumatic control valve 22 can be arranged on the valve housing body 2111, and the pneumatic control valve inlet J and the pneumatic control valve outlet K can also be arranged on the valve housing body 2111, and are correspondingly connected to form a channel.

[0054] Continue to refer to Figures 4 to 6 and Figure 10 , the inside of the inner liner 2112 is provided with a first sliding section 21121 and a second sliding section 21122. Specifically, the first sliding section 21121 can be arranged close to the closed end of the valve housing body 2111, and the second sliding section 21122 can be arranged close to the plug 2113, so that the pneumatic control valve core 212 can slide along the first sliding section 21121 and the second sliding section 21122, and both ends of the pneumatic control valve core 212 are respectively placed in the first sliding section 21121 and the second sliding section 21122. The first end of the pneumatic control valve core 212 (such as Figure 4 shown as the right end) is the end face on the reverse sliding side of the pneumatic control valve core and is the closed end of the valve housing body 2111 (such as Figure 4When there is a gap between the first sliding section 21121 and the closed end of the valve housing body 2111 at the first end of the pneumatic control valve core 212 (the right end shown in the figure), the part of the first sliding section 21121 between the first end of the pneumatic control valve core 212 and the closed end of the valve housing body 2111 serves as the first pneumatic control reversing cavity 213. When there is a gap between the second end of the pneumatic control valve core 212 (the left end shown in the figure), that is, the forward sliding side end face of the pneumatic control valve core and the plug 2113, the part of the second sliding section 21122 between the second end of the pneumatic control valve core 212 and the plug 2113 serves as the second pneumatic control reversing cavity 214. Among them, the cross-sectional area of the second sliding section 21122 is larger than that of the first sliding section 21121, so that the cross-sectional area of the second pneumatic control reversing cavity 214 is larger than that of the first pneumatic control reversing cavity 213. Thus, when injecting gas and loading on the forward sliding side of the pneumatic control valve core, it can push the pneumatic control valve core to slide reversely. In this embodiment, a step surface is formed at the connection between the first sliding section 21121 and the second sliding section 21122, which can limit the position of the pneumatic control valve core 212. Figure 4 When there is a gap between the second end of the pneumatic control valve core 212 (the left end shown in the figure), that is, the forward sliding side end face of the pneumatic control valve core and the plug 2113, the part of the second sliding section 21122 between the second end of the pneumatic control valve core 212 and the plug 2113 serves as the second pneumatic control reversing cavity 214. Among them, the cross-sectional area of the second sliding section 21122 is larger than that of the first sliding section 21121, so that the cross-sectional area of the second pneumatic control reversing cavity 214 is larger than that of the first pneumatic control reversing cavity 213. Thus, when injecting gas and loading on the forward sliding side of the pneumatic control valve core, it can push the pneumatic control valve core to slide reversely. In this embodiment, a step surface is formed at the connection between the first sliding section 21121 and the second sliding section 21122, which can limit the position of the pneumatic control valve core 212.

[0055] In this embodiment, a breathing port D is provided on the inner lining sleeve 2112, and a breathing port E communicating with the breathing port D is further provided on the valve housing body 2111. The breathing port D and the breathing port E are combined to form a breathing channel 216 to realize the entry or discharge of the gas in the breathing groove 215.

[0056] Continue to refer to Figure 6 and Figure 10 As shown in the figure, the inner lining sleeve 2112 is provided with a first inner lining port I, a second inner lining port G, and a third inner lining port H, which are respectively communicated with the first air outlet A, the exhaust port R, and the second air outlet B. By cutting off the control between the first inner lining port I, the second inner lining port G, the third inner lining port H and the air inlet P, the cut-off between the first air outlet A, the exhaust port R, the second air outlet B and the air inlet P is realized. Specifically, the first inner lining port I, the second inner lining port G, and the third inner lining port H can be three sections respectively arranged on the inner lining sleeve 2112, as shown in Figure 10As shown, from right to left, the first inner lining port I, the second inner lining port G, and the third inner lining port H are sequentially arranged on three thin cylinder segments of the inner lining sleeve 2112. For example, there are two circles of the first inner lining ports I on the left and right on the first thin cylinder segment, and the two circles of the first inner lining ports I are arranged staggeredly along the circumferential direction of the first thin cylinder segment. The outer circle of the first thin cylinder segment has a first inner lining ring groove along its circumferential direction, and each first inner lining port I communicates with the first inner lining ring groove; there is one circle of the second inner lining ports G on the second thin cylinder segment, the outer circle of the first thin cylinder segment has a second inner lining ring groove along its circumferential direction, and each second inner lining port G communicates with the second inner lining ring groove; there are two circles of the third inner lining ports H on the left and right on the third thin cylinder segment, and the two circles of the third inner lining ports H can be arranged staggeredly along the circumferential direction of the third thin cylinder segment. The outer circle of the third thin cylinder segment has a third inner lining ring groove along its circumferential direction, and each third inner lining port H communicates with the third inner lining ring groove. Moreover, the first inner lining ring groove, the second inner lining ring groove, and the third inner lining ring groove are separated by partitions, that is, the first inner lining port I, the second inner lining port G, and the third inner lining port H do not communicate with each other.

[0057] In this embodiment, a plurality of sealing grooves are provided on the inner lining sleeve 2112 to limit the sealing ring.

[0058] Continue to refer to Figure 6 and Figure 11 , an air control reversing port C is provided on the plug cover 2113 for communicating with the air outlet F2 of the first air control valve 22, so that the gas injected into the air control loading port Y1 can flow from the air outlet F2 of the first air control valve 22 to the air control reversing port C and be discharged from the air control reversing port C to the forward sliding side of the air control valve core 212. Specifically, the air control reversing port C can be arranged along the axial direction of the plug cover 2113, and moreover, the plug cover 2113, the inner lining sleeve 2112, the valve housing body 2111, and the air control valve core 212 are all coaxially arranged. By exhausting gas at the air control reversing port C, a force can be applied to the air control valve core 212 along the axial direction of the air control valve core 212, so that the air control valve core 212 can slide reversely.

[0059] Continue to refer to Figure 4 , Figure 5 and Figure 12 , the air control valve core 212 is adapted to the first sliding segment 21121. The first end (such as the right end shown in Figure 4 ) of the air control valve core 212 is slidably arranged in the first sliding segment 21121. A first air control reversing cavity 213 is formed between the first end of the air control valve core 212 and the plugging end (such as the right end shown in Figure 4 ) of the valve housing body 211 in the first sliding segment 21121; the second end (such as the one shown in Figure 12At the left end shown, a sliding plate 2121 adapted to the second sliding section 21122 is provided. The sliding plate 2121 is slidably disposed within the second sliding section 21122. Moreover, a second pneumatic control reversing cavity 214 is formed between the sliding plate 2121 and the plug cover 2113 within the second sliding section 21122.

[0060] Specifically, when the pneumatic control valve core 212 slides forward within the inner lining sleeve 2112 to the first extreme position, the second end of the pneumatic control valve core 212 abuts against and contacts the plug cover 2113, and the first extreme position is limited by the plug cover 2113. When the pneumatic control valve core 212 slides backward within the inner lining sleeve 2112 to the second extreme position, the first end of the pneumatic control valve core 212 abuts against and contacts the sealing end of the valve housing body 2111, and the second end of the pneumatic control valve core 212 abuts against and contacts the step surface between the first sliding section 21121 and the second sliding section 21122. That is, the second extreme position is limited by the sealing end of the valve housing body 2111 and the step surface between the first sliding section 21121 and the second sliding section 21122.

[0061] Continue to refer to Figure 4 、 Figure 5 and Figure 12 As shown, a first cut-off limiting plate 2122 is provided at the first end of the pneumatic control valve core 212. On one side of the first cut-off limiting plate 2122 (such as Figure 12 the left side shown), a second cut-off limiting plate 2123 is further provided. A peripheral switching channel 2124 is formed circumferentially on the pneumatic control valve core 212 between the first cut-off limiting plate 2122 and the second cut-off limiting plate 2123.

[0062] Specifically, the outer diameter of the pneumatic control valve core 212 is smaller than the inner diameter of the inner lining sleeve 2112. The outer diameters of the first cut-off limiting plate 2122 and the second cut-off limiting plate 2123 can be adapted to the inner diameter of the inner lining sleeve 2112 to be slidably connected inside the inner lining sleeve 2112. A groove is formed on the outer periphery of the pneumatic control valve core 212 between the first cut-off limiting plate 2122 and the second cut-off limiting plate 2123. The groove and the inner wall of the inner lining sleeve 2112 form the peripheral switching channel 2124. In this embodiment, on the side of the second cut-off limiting plate 2123 facing away from the first cut-off limiting plate 2122 (such as Figure 12On the left side shown), a support plate 2125 is also provided. The outer diameter of the support plate 2125 can be adapted to the inner diameter of the inner bushing 2112 to be slidably connected inside the inner bushing 2112. A connection channel 2126 is formed between the support plate 2125 and the second cut-off limit plate 2123 on the outer periphery of the pneumatic control valve core 212. That is to say, a groove is formed between the support plate 2125 and the second cut-off limit plate 2123 on the outer periphery of the pneumatic control valve core 212, and a connection channel 2126 is formed between this groove and the inner wall of the inner bushing 2112. This connection channel 2126 is used to connect the gas injection port P and the second air outlet B so that the second air outlet B can be used as the air inlet of the second cylinder cavity 113, enabling the second cylinder cavity 113 to intake air.

[0063] In this embodiment, an air path channel 217 is provided inside the pneumatic control valve core 212, and its air inlet is arranged on the first end face of the pneumatic control valve core 212 (such as Figure 12 the right end face shown) and is used to connect the air inlet P so that the gas injected from the gas injection port P can flow into the air path channel 217. A vent hole 2128 communicating with the intake channel 2127 is provided on the outer side wall of the pneumatic control valve core 212. When the pneumatic control valve core 212 slides reversely to the second extreme position, the vent hole 2128 communicates with the second air outlet B, and the air inlet of the air path channel 217 communicates with the air inlet P to realize the connection between the air inlet P and the second air outlet B. Specifically, the intake channel 2127 can be a blind hole arranged along the axial direction of the pneumatic control valve core 212, and the vent hole 2128 can be arranged at the position where the intake channel 2127 is provided inside, especially between the support plate 2125 and the second cut-off limit plate 2123, communicating with the intake channel 2127 inside and can communicate with the connection channel 2126 outside, that is, to realize the connection between the vent hole 2128 and the third inner lining port H, so that the gas in the air path channel 217 can flow out from the vent hole 2128 and flow through the third inner lining port H and the second air outlet B in sequence to flow into the second cylinder cavity 113 to realize the intake of air in the second cylinder cavity 113.

[0064] such as Figure 5As shown, when the pneumatic control valve core 212 slides forward to the first limit position within the inner liner 2112, the first cut-off limit plate 2122 is located between the first inner liner port I and the second inner liner port G. The first inner liner port I is fully opened, and the first inner liner port I and the second inner liner port G are cut off to cut off the first air outlet A and the exhaust port R. The second inner liner port G and the third inner liner port H are both connected to the outer peripheral switching channel 2124, so as to realize the connection between the second inner liner port G and the third inner liner port H through the outer peripheral switching channel 2124, and further realize the connection between the exhaust port R and the second air outlet B to realize the exhaust of the second cylinder cavity 113. At the same time, the support plate 2125 and the connection channel 2126 are placed on the left side of the third inner liner port H, and the connection between the connection channel 2126 and the third inner liner port H is disconnected. In this embodiment, when the pneumatic control valve core 212 slides forward to the first limit position within the inner liner 2112, the support plate 2125 is located on the left side of the third inner liner port H and is in pressing contact with the inner wall of the first sliding section 21121. At this time, the connection channel 2126 is in a closed structure. The first cut-off limit plate 2122 is located between the first inner liner port I and the second inner liner port G, and the first inner liner port I is fully opened, that is, the first inner liner port I is connected to the first pneumatic control reversing cavity 213. Since the connection channel 2126 is closed and the first inner liner port I is an opening, the injection port P is connected to the air source. After the gas is discharged from the injection port P, it flows into the first pneumatic control reversing cavity 213. The gas flows from the first inner liner port I to the first air outlet A and then flows from the first air outlet A into the first cylinder cavity 112 to realize the injection of the first cylinder cavity 112.

[0065] As Figure 4 shown, when the pneumatic control valve core 212 slides backward to the second limit position within the inner liner 2112, the first cut-off limit plate 2122 is placed on the side of the first inner liner port I facing away from the second inner liner port G (such as Figure 4 shown on the right side) and is in pressing contact with the sealing end of the valve housing body 2111 (such as Figure 4The right end shown), the second cutting limit plate 2123 is arranged between the second inner liner opening G and the third inner liner opening H to cut off the second inner liner opening G and the third inner liner opening H, thereby cutting off the exhaust port R and the second air outlet B. Both the first inner liner opening I and the second inner liner opening G are connected to the outer peripheral switching channel 2124 to achieve the connection between the first inner liner opening I and the second inner liner opening G through the outer peripheral switching channel 2124, thereby achieving the connection between the first air outlet A and the exhaust port R and realizing the exhaust of the first cylinder cavity 112. At the same time, the support plate 2125 is placed on the left side of the third inner liner opening H, and the second cutting limit plate 2123 is placed on the right side of the third inner liner opening H. Therefore, the connection channel 2126 is connected to the third inner liner opening H. Due to the injection loading in the second pneumatic control reversing cavity 214, the gas cannot push the pneumatic control valve core 212 to slide forward after being discharged from the injection port P. Therefore, the gas can only flow into the intake channel 2127 and enter the connection channel 2126 through the ventilation hole 2128, then flow through the third inner liner opening H and the second air outlet B in sequence, and flow into the second cylinder cavity 113 to realize the injection of the second cylinder cavity 113.

[0066] In this embodiment, a sealing groove is provided on the sliding plate 2121. The first cutting limit plate 2122, the second cutting limit plate 2123, and the support plate 2125 are all multiple, for example, three. A sealing groove is formed by enclosing between adjacent two, that is, a sealing groove is formed between adjacent two first cutting limit plates 2122, a sealing groove is formed between adjacent two second cutting limit plates 2123, and a sealing groove is formed between adjacent two support plates 2125.

[0067] The working process of this energy-saving hydraulic station:

[0068] As Figure 2 shown, when the cylinder piston 111 slides to the left, there is a gap between the cylinder piston 111 and the second pneumatic control valve 23 on the right side, and the second pneumatic control valve 23 resets to the closed state, so that the intake port F3 and the air outlet F4 of the second pneumatic control valve 23 are disconnected; when the cylinder piston 111 slides to the left end, the first pneumatic control valve 22 is triggered to open, so that the first pneumatic control valve 22 is opened and the intake port F1 and the air outlet F2 of the first pneumatic control valve 22 are connected; As Figure 4As shown in the figure, the pneumatic control loading port Y1 is connected to the air source. Gas flows in from the pneumatic control loading port Y1, passes through the inlet J of the pneumatic control valve and the air inlet F1 of the first pneumatic control valve 22 and enters the first pneumatic control valve 22, then flows out from the air outlet F2 of the first pneumatic control valve 22 and the outlet K of the pneumatic control valve and reaches the pneumatic control reversing port C, and is discharged from the pneumatic control reversing port C. The discharged gas exerts a rightward acting force on the left end face of the sliding plate 2121 of the pneumatic control valve core 212. Since the cross-sectional area of the cavity on the left side of the pneumatic control valve core 212, that is, the second pneumatic control reversing cavity 214, is larger than the cross-sectional area of the first pneumatic control reversing cavity 213 on the right side of the pneumatic control valve core 212, the force on the second pneumatic control reversing cavity 214 side of the pneumatic control valve core 212 is greater than the force on the first pneumatic control reversing cavity 213 side, and thus the pneumatic control valve core 212 can be pushed to slide reversely, that is, slide to the right. There is a gap between the sliding plate 2121 and the plug 2113 in the second sliding section 21122 and the gap gradually increases. The part between the sliding plate 2121 and the plug 2113 in the second sliding section 21122 serves as the second pneumatic control reversing cavity 214 until the pneumatic control valve core 212 slides to the right until the right end of the pneumatic control valve core 212 abuts against the closed end of the valve housing body 2111, that is, at the second limit position, as Figure 4 shown in the position, the pneumatic control valve core 212 stops sliding. At this time, the first inner lining port I and the second inner lining port G are both connected to the outer peripheral switching channel 2124, and the third inner lining port H is connected to the connecting channel 2126; due to the gas injection loading in the second pneumatic control reversing cavity 214, the gas injection port P is connected to the air source. After the gas is discharged from the gas injection port P, it cannot push the pneumatic control valve core 212 to slide forward, that is, to the left. The gas then flows into the intake channel 2127, enters the connecting channel 2126 through the vent hole 2128, then flows through the third inner lining port H and the second air outlet B in sequence, and flows into the second cylinder cavity 113 to realize the gas injection in the second cylinder cavity 113; the first inner lining port I and the second inner lining port G are both connected to the outer peripheral switching channel 2124, so that the gas in the first cylinder cavity 112 can flow in from the first air outlet A, flow from the first inner lining port I into the outer peripheral switching channel 2124, and flow through the second inner lining port G and the exhaust port R in sequence to be discharged from the exhaust port R to realize the exhaust of the first cylinder cavity 112; that is to say, the second cylinder cavity 113 can intake air, and the compressed air pushes the cylinder piston 111 to move to the right, and the first cylinder cavity 112 exhausts air;

[0069] During the rightward sliding of the cylinder piston 111, there is a gap between the cylinder piston 111 and the first pneumatic control valve 22 on the left side, and the first pneumatic control valve 22 resets to the closed state, causing the disconnection between the air inlet F1 and the air outlet F2 of the first pneumatic control valve 22; when the cylinder piston 111 slides to the right end, it triggers and opens the second pneumatic control valve 23, making the air inlet F3 of the second pneumatic control valve 23 communicate with the air outlet F4 of the second pneumatic control valve 23. The gas in the second pneumatic control and reversing cavity 214 flows out from the pneumatic control and reversing port C, passes through the pneumatic control unloading port Y2 and the air inlet F3 of the second pneumatic control valve 23, flows into the second pneumatic control valve 23, and is discharged from the air outlet F4 of the second pneumatic control valve 23, realizing the unloading of the second pneumatic control and reversing cavity 214. The air pressure in the second pneumatic control and reversing cavity 214 gradually decreases. During the unloading process, the air source connected to the air injection port P continuously injects air, and the air injection port P continuously applies a leftward acting force to the pneumatic control valve core 212. Therefore, as the second pneumatic control and reversing cavity 214 unloads, the gas injected from the air injection port P can push the pneumatic control valve core 212 to slide leftward. There is a gap between the right end of the pneumatic control valve core 212 and the closed end of the valve housing body 2111, and the gap gradually increases. The part within the first sliding section 21121 between the right end of the pneumatic control valve core 212 and the closed end of the valve housing body 2111 serves as the first pneumatic control and reversing cavity 213 until it slides to the left end, that is, the left end face of the sliding plate 2121 presses against and contacts the plug cover 2113, which is the first limit position, as Figure 5 shown in the position, and the pneumatic control valve core 212 stops sliding. At this time, the first cut-off limit plate 2122 is located between the first inner lining port I and the second inner lining port G. The first inner lining port I is fully opened and communicates with the first pneumatic control and reversing cavity 213. Since the connection channel 2126 is closed and the first inner lining port I is open, the gas injected from the air source connected to the air injection port P flows into the first pneumatic control and reversing cavity 213 after being discharged from the air injection port P. The gas flows from the first inner lining port I to the first air outlet A and then from the first air outlet A to the first cylinder cavity 112, realizing the air injection into the first cylinder cavity 112; when the pneumatic control valve core 212 is in the first limit position, the second inner lining port G and the third inner lining port H are both connected to the outer peripheral switching channel 2124, so that the compressed gas in the second cylinder cavity 113 can flow into the third inner lining port H from the second air outlet B, pass through the outer peripheral switching channel 2124 and the second inner lining port G, and flow to the discharge port R to be discharged from the discharge port R; that is to say, the first cylinder cavity 112 intakes air, and the compressed air pushes the cylinder piston 111 to move leftward, while the second cylinder cavity 113 exhausts air.

[0070] In summary, for the energy-saving hydraulic station and pneumatically controlled reversing valve provided in this embodiment, the forward sliding side of the pneumatically controlled valve core 212 is unloaded through the pneumatically controlled unloading port Y2. When the air inlet P injects air into the reverse sliding side of the pneumatically controlled valve core 212, the pneumatically controlled valve core 212 can slide forward in the pneumatically controlled valve housing 211 until it slides forward to the first limit position. At this time, the air inlet P is connected to the first air outlet A, the second air outlet B is connected to the exhaust port R, and the first air outlet A is disconnected from the exhaust port R, so as to inject air into the cavity connected to the first air outlet A with the first air outlet A as the air inlet, and exhaust the air from the cavity connected to the second air outlet B with the second air outlet B as the exhaust port R; and the forward sliding side of the pneumatically controlled valve core is loaded through the pneumatically controlled loading port Y1, so that the pneumatically controlled valve core 212 can slide backward in the pneumatically controlled valve housing 211 until it slides backward to the second limit position. At this time, the air inlet P is connected to the second air outlet B, the second air outlet B is disconnected from the exhaust port R, and the first air outlet A is connected to the exhaust port R, so as to inject air into the cavity connected to the second air outlet B with the second air outlet B as the air inlet, and exhaust the air from the cavity connected to the first air outlet A with the first air outlet A as the exhaust port R. Therefore, the energy-saving hydraulic station and pneumatically controlled reversing valve use the pneumatically controlled loading port Y1 and the pneumatically controlled unloading port Y2 to load and unload the forward sliding side of the pneumatically controlled valve core 212 respectively. By loading, the stability and continuity of the reverse sliding of the pneumatically controlled valve core 212 can be achieved, and by unloading, the resistance of the forward sliding of the pneumatically controlled valve core 212 can be reduced, thereby avoiding the jamming of the pneumatically controlled valve core 212 during the commutation process and preventing the pneumatically controlled valve core 212 from stopping in the middle position.

[0071] It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only 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, and therefore cannot be understood as a limitation of the present invention.

[0072] In addition, it should also be noted that in the description of the present invention, 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 invention can be understood according to specific situations.

[0073] 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 their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A pneumatically controlled reversing valve, characterized in that: include: Air-controlled valve housing and air-controlled valve core; wherein, The air-controlled valve core is slidably arranged inside the air-controlled valve housing along the length direction of the air-controlled valve housing; The air-controlled valve housing is provided with an air inlet P, a first air outlet A, a second air outlet B, an exhaust port R, an air-controlled loading port Y1, and an air-controlled unloading port Y2. The air-controlled loading port Y1 and the air-controlled unloading port Y2 are used to load and unload the forward sliding side of the air-controlled valve core, respectively; After the forward sliding side of the air-controlled valve core is unloaded through the air-controlled unloading port Y2, the air inlet P injects air into the reverse sliding side of the air-controlled valve core, and the air-controlled valve core can slide forward in the air-controlled valve housing until it slides forward to the first limit position. At this time, the air inlet P is connected to the first air outlet A, and the second air outlet B is connected to the exhaust port R. The first air outlet A and the exhaust port R are disconnected, so that the first air outlet A is used as the air inlet to inject air into the cavity connected to the first air outlet A, and the second air outlet B is used as the exhaust port R to exhaust the cavity connected to the second air outlet B; When the forward sliding side of the air-controlled valve core is loaded through the air-controlled loading port Y1, the air-controlled valve core can slide reversely in the air-controlled valve housing until it slides reversely to the second extreme position. At this time, the air inlet P is connected to the second air outlet B, and the second air outlet B is disconnected from the exhaust port R. The first air outlet A is connected to the exhaust port R, so that the second air outlet B is used as the air inlet to inject air into the cavity connected to the second air outlet B, and the first air outlet A is used as the exhaust port R to exhaust the cavity connected to the first air outlet A.

2. The gas-controlled reversing valve according to claim 1, characterized in that: The air-controlled valve housing comprises: a valve housing body, an inner liner and a plug cover; wherein, The valve housing body is a cylindrical structure with one end open and the other end closed; The inner sleeve is sleeved inside the valve housing body, and the plugging cover is arranged at the open end of the valve housing body to limit and seal the inner sleeve.

3. The gas-controlled reversing valve according to claim 2, characterized in that: The inner liner is provided with a first sliding section and a second sliding section; The air-controlled valve core is adapted to the first sliding section, and the first end of the air-controlled valve core can be slidably arranged in the first sliding section, and a first air-controlled reversing cavity can be formed in the first sliding section between the first end of the air-controlled valve core and the blocking end of the valve housing body, and the second end of the air-controlled valve core is provided with a sliding plate adapted to the second sliding section, and the sliding plate can be slidably arranged in the second sliding section, and a second air-controlled reversing cavity can be formed in the second sliding section between the sliding plate and the blocking cover.

4. The gas-controlled reversing valve according to claim 3, characterized in that: A cross-sectional area of ​​the second sliding section is greater than a cross-sectional area of ​​the first sliding section.

5. The air-controlled reversing valve according to claim 2, characterized in that: The first air outlet A, the second air outlet B and the exhaust port R are all arranged on the valve housing body, and the inner sleeve is provided with a first inner liner port I, a second inner liner port G and a third inner liner port H, which are respectively connected with the first air outlet A, the exhaust port R and the second air outlet B; A first cut-off limit plate is provided at the first end of the air-controlled valve core, a second cut-off limit plate is provided on one side of the first cut-off limit plate, and an outer peripheral switching channel is provided between the first cut-off limit plate and the second cut-off limit plate in the circumferential direction of the air-controlled valve core; When the air control valve core slides forward in the inner sleeve to the first limit position, the first cut-off limit plate is located between the first inner liner port I and the second inner liner port G, the first inner liner port I is fully opened, the first inner liner port I and the second inner liner port G are cut off, so as to cut off the first air outlet A and the exhaust port R, and the second inner liner port G and the third inner liner port H are both connected with the peripheral switching channel, so as to realize the second inner liner port G and the third inner liner port H through the peripheral switching channel, and then realize the communication between the exhaust port R and the second air outlet B; When the air-controlled valve core slides reversely to the second extreme position in the inner sleeve, the first cut-off limit plate is placed on the side of the first liner port I facing away from the second liner port G and presses against the sealing end of the valve housing body, and the second cut-off limit plate is arranged between the second liner port G and the third liner port H to cut off the second liner port G and the third liner port H, and further cut off the exhaust port R and the second air outlet B. The first liner port I and the second liner port G are both connected to the peripheral switching channel to realize the connection between the first liner port I and the second liner port G through the peripheral switching channel, and further realize the connection between the first air outlet A and the exhaust port R.

6. The gas-controlled reversing valve according to claim 2, characterized in that: The air inlet P is arranged on the closed end of the valve housing body, and is used to inject air into the reverse sliding side of the air-controlled valve core, so that after the forward sliding side of the air-controlled valve core is unloaded, the gas entering through the air inlet P can apply a forward sliding force to the air-controlled valve core, so that the air-controlled valve core can slide forward.

7. The air-controlled reversing valve according to claim 2, characterized in that: The air control loading port Y1 is arranged on the valve housing body, and is used to connect the air inlet F1 of the first air control valve and the air source respectively; The plug cover is provided with an air control reversing port for connecting to the air outlet F2 of the first air control valve; The valve housing body is also provided with an air-controlled unloading port Y2, which is connected to the air-controlled reversing port. The air-controlled unloading port Y2 is used to connect to the air inlet F3 of the second air-controlled valve, and the air outlet F4 of the second air-controlled valve is connected to the outside. When the first air-controlled valve is opened and the air inlet F1 of the first air-controlled valve is connected to the air outlet F2 of the first air-controlled valve, the compressed gas can flow through the air-controlled loading port Y1, the air inlet F1 of the first air-controlled valve, the first air-controlled valve, the air outlet F2 of the first air-controlled valve, and the air-controlled reversing port in sequence, and be discharged from the air-controlled reversing port to the positive sliding side of the air-controlled valve core, thereby realizing gas injection loading on the positive sliding side of the air-controlled valve core; When the second air-controlled valve is opened and the air inlet F3 of the second air-controlled valve and the air outlet F4 of the second air-controlled valve are connected, the compressed gas on the positive sliding side of the air-controlled valve core can flow through the air-controlled reversing port, the air-controlled unloading port Y2, the air inlet F3 of the second air-controlled valve, the second air-controlled valve, and the air outlet F4 of the second air-controlled valve in sequence, and be discharged from the air outlet F4 of the second air-controlled valve, thereby realizing the exhaust and unloading of the positive sliding side of the air-controlled valve core.

8. The air-controlled reversing valve according to any one of claims 1 to 7, characterized in that: The air control valve core is provided with an air path channel, the air inlet of which is arranged on the first end surface of the air control valve core, and is used to communicate with the air inlet P; An air vent hole connected to the air path channel is provided on the outer side wall of the air-controlled valve core. When the air-controlled valve core slides in the opposite direction to the second extreme position, the air vent hole is connected to the second air outlet B, and the air inlet of the air path channel is connected to the air inlet P, so as to realize the connection between the air inlet P and the second air outlet B.

9. The air-controlled reversing valve according to any one of claims 1 to 7, characterized in that: A breathing groove is formed between the two ends of the air-controlled valve core and the position close to the second end of the air-controlled valve core and the air-controlled valve housing. A breathing port connected to the breathing groove is provided on the air-controlled valve housing for connecting to the outside world so as to inhale and discharge gas from the breathing groove when the air-controlled valve core slides.

10. An energy-saving hydraulic station, characterized in that: A gas-controlled reversing valve as claimed in any one of claims 1 to 9 is provided.

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