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

Abstract

The invention provides a pneumatic operated directional valve and an energy-saving hydraulic station with the pneumatic operated directional valve. The pneumatic control valve comprises a pneumatic control valve shell and a pneumatic control valve element. 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 correspondingly, the stability and continuity of reverse sliding of the pneumatic control valve element can be achieved through loading, the forward sliding resistance 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 efficiency 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 invention relates to a hydraulic station, in particular to an air-controlled reversing valve and an energy-saving hydraulic station with the air-controlled reversing valve. Background Art

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

[0003] Chinese invention patent specification CN219081986 discloses a gas-controlled reversing valve, such as Figure 1 As shown, it includes: an oil tank 1', a gas-liquid booster pump and an electromagnetic valve group 6'; the liquid outlet of the oil tank 1' is connected to the liquid inlet of the gas-liquid booster pump; the liquid outlet of the gas-liquid booster pump is connected to the liquid inlet of the electromagnetic valve group 6'; the liquid return port of the electromagnetic valve group 6' is connected to the liquid inlet of the oil tank 1'; the gas-liquid booster pump includes: a pneumatic cylinder 10' and an oil cylinder 11'; the pneumatic cylinder 10' and the oil cylinder 11' are connected; a pneumatic piston in contact with the inner wall is provided in the pneumatic cylinder 10', and an oil cylinder piston in contact with the inner wall is provided in the oil cylinder 11'; the piston area of ​​the pneumatic piston is larger than the piston area of ​​the oil cylinder piston; it also includes an air supply device, including: an air source, a first air control valve 27', a second air control valve 28' and an air control reversing valve 29'; the first A pneumatic control valve 27' is arranged on one side of the pneumatic cylinder 10, and the second pneumatic control valve 28 is arranged on the other side of the pneumatic cylinder 10'; the air source is connected to the air inlets of the first pneumatic control valve 27', the second pneumatic control valve 28' and the pneumatic control reversing valve 29' respectively; the pneumatic control reversing valve 28' comprises: an A' outlet and a B' outlet; the A' outlet is connected to one side of the pneumatic cylinder 10', and the B' outlet is connected to the other side of the pneumatic cylinder 10'; the first pneumatic control valve 27' is connected to the pneumatic control reversing valve 29' through the first air source circuit 30' to control the pneumatic control reversing valve 29' to start the A' outlet; the second pneumatic control valve 28' is connected to the pneumatic control reversing valve 29' through the second air source circuit 31' to control the pneumatic control reversing valve 29' to start the B' outlet.

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

[0005] When the above-mentioned pneumatic control reversing valve is used in a factory environment, it is necessary that both the first pneumatic control valve 27' and the second pneumatic control valve 28' are connected to the air source, and after one of the pneumatic control valves is triggered to open, the gas in the air source flows through the pneumatic control valve and then flows into the pneumatic control reversing valve 29', pushing the pneumatic control reversing valve 29' to perform reversal on the corresponding side, resulting in the two-way reversal of the pneumatic control reversing valve being limited by the air source. When the air supply pressure becomes insufficient during reversal on either side, the pneumatic cylinder piston retreats a little, causing the reversing valve core to stop in the middle position, that is, the A' and B' air outlets of the pneumatic control reversing valve are not connected to the air source, the air intake at both ends of the cylinder is interrupted, the gas-liquid booster pump stops, and no hydraulic pressure is output. The hydraulic station will be stuck, and the tooling will lose pressure, resulting in the workpiece not being clamped tightly, hitting the tool, and other problems. Even if an energy storage tank is used, when the tooling uses hydraulic pressure again, after the pressure in the accumulator behind the hydraulic one-way valve is released, the tooling will still lose pressure, resulting in the workpiece not being clamped tightly, hitting the tool, and other problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an air-controlled reversing valve which will not get stuck on both sides and an energy-saving hydraulic station having the air-controlled reversing valve.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: On the one hand, the present invention proposes an air-controlled reversing valve, which includes: an air-controlled valve housing and an 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, wherein the air-controlled loading port Y1 and the air-controlled unloading port Y2 are respectively used to load and unload the forward sliding side of the air-controlled valve core; 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 which time the air inlet P and the first air outlet A are in a closed position. The air-controlled valve core is connected, 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 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 air from 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, and 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 air from the cavity connected to the first air outlet A.

[0008] Furthermore, in the above-mentioned air-controlled reversing valve, the air-controlled valve housing comprises: a valve housing body, an inner sleeve and a blocking cover; wherein the valve housing body is a cylindrical structure with an open end and a closed end at the other end; the inner sleeve is sleeved inside the valve housing body, and the blocking cover is arranged at the open end of the valve housing body for limiting and sealing the inner sleeve.

[0009] Furthermore, in the above-mentioned air-controlled reversing valve, a first sliding section and a second sliding section are provided inside the inner sleeve; the air-controlled valve core is adapted to the first sliding section, the first end of the air-controlled valve core is slidably disposed in the first sliding section, 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, the second end of the air-controlled valve core is provided with a sliding plate adapted to the second sliding section, the sliding plate is slidably disposed 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.

[0010] Furthermore, in the above-mentioned air-controlled reversing valve, the cross-sectional area of ​​the second sliding section is larger than the cross-sectional area of ​​the first sliding section.

[0011] Furthermore, in the above-mentioned air-controlled reversing valve, 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, and a second cut-off limit plate is further provided on one side of the first cut-off limit plate of the air-controlled valve core, and a peripheral switching channel is provided between the first cut-off limit plate and the second cut-off limit plate in the circumference of the air-controlled valve core; when the air-controlled valve core slides forward to the first limit position in the inner sleeve, 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, 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, and the second The liner port G and the third liner port H are both connected to the peripheral switching channel to realize the second liner port G and the third liner port H through the peripheral switching channel, thereby realizing the connection 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 liner 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 shell 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, thereby cutting off the exhaust port R and the second air outlet B, and 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, thereby realizing the connection between the first air outlet A and the exhaust port R.

[0012] Furthermore, in the above-mentioned air-controlled reversing 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 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 exert a forward sliding force on the air-controlled valve core, so that the air-controlled valve core can slide forward.

[0013] Furthermore, in the above-mentioned air-controlled reversing valve, the air-controlled loading port Y1 is arranged on the valve housing body, and is used to connect the air inlet F1 of the first air-controlled valve and the air source respectively; the blocking cover is provided with an air-controlled reversing port, which is used to connect the air outlet F2 of the first air-controlled valve; the valve housing body is also provided with an air-controlled unloading port Y2, which is communicated with the air-controlled reversing port, and the air-controlled unloading port Y2 is used to connect the air inlet F3 of the second air-controlled valve, and the air outlet F4 of the second air-controlled valve is communicated with the outside; when the first air-controlled valve is opened and the air inlet F1 of the first air-controlled valve is connected with the air outlet F2 of the first air-controlled valve, the compressed gas can flow through the air-controlled loading port Y1, the first air-controlled The compressed gas flows through the air inlet F1 of the valve, the first air-controlled valve, the air outlet F2 of the first air-controlled valve, and the air-controlled reversing port, and is discharged from the air-controlled reversing port to the forward sliding side of the air-controlled valve core, thereby realizing the injection and loading of the forward 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 forward 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 is discharged from the air outlet F4 of the second air-controlled valve, thereby realizing the exhaust and unloading of the forward sliding side of the air-controlled valve core.

[0014] Furthermore, in the above-mentioned air-controlled reversing valve, an air path channel is provided on the air-controlled valve core, and its air inlet is arranged on the first end face of the air-controlled valve core, for connecting the air inlet P; an air vent hole connected to the air path channel is provided on the outer peripheral side wall of the air-controlled valve core, and 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.

[0015] Furthermore, in the above-mentioned air-controlled reversing valve, a breathing groove is formed between the two ends of the air pore valve core and the position close to the second end of the air pore valve core and the air-controlled valve housing, and 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 pore valve core slides.

[0016] The air-controlled reversing valve provided by the present invention unloads the forward sliding side of the air-controlled valve core through the air-controlled unloading port Y2. When the air inlet P injects air into the reverse sliding side of the air-controlled valve core, 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, the second air outlet B is connected to the exhaust port R, and 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 inject air into the second air outlet The cavity connected to the air port B is exhausted; and the forward sliding side of the air-controlled valve core is loaded through the air-controlled loading port Y1, so that the air-controlled valve core can slide in the reverse direction in the air-controlled valve housing until it slides in the reverse direction 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 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. Therefore, the energy-saving hydraulic station and the air-controlled reversing valve are used to load and unload the forward sliding side of the air-controlled valve core through the air-controlled loading port Y1 and the air-controlled unloading port Y2, respectively. The stability and continuity of the reverse sliding of the air-controlled valve core can be achieved through loading, and the resistance of the forward sliding of the air-controlled valve core can be reduced through unloading, thereby avoiding the stuck state of the air-controlled valve core during the reversing process and avoiding the air-controlled valve core stopping in the middle position.

[0017] On the other hand, the present invention also proposes an energy-saving hydraulic station, which is provided with the above-mentioned air-controlled reversing valve.

[0018] Since the air-controlled reversing valve has the above-mentioned effects, the energy-saving hydraulic station having the air-controlled reversing valve also has corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a gas-controlled reversing valve in the prior art; Figure 2 A schematic diagram of the structure of an energy-saving hydraulic station provided by an embodiment of the present invention; Figure 3 A schematic structural diagram showing the internal structure of a gas-controlled reversing valve is provided for an energy-saving hydraulic station according to an embodiment of the present invention; Figure 4A schematic structural diagram of the air-controlled reversing valve provided in an embodiment of the present invention moving to a first extreme position; Figure 5 A schematic structural diagram of the air-controlled reversing valve provided in an embodiment of the present invention moving to the second extreme position; Figure 6 A schematic diagram of the structure of an air-controlled valve housing in an air-controlled reversing valve provided in an embodiment of the present invention; Figure 7 A front view of a valve housing body provided in an embodiment of the present invention; Figure 8 A top view of a valve housing body provided in an embodiment of the present invention; Fig. 9 A rear view of a valve housing body provided in an embodiment of the present invention; Fig.10 A schematic diagram of the structure of an inner bushing provided in an embodiment of the present invention; Fig.11 A schematic diagram of the structure of a plugging cover provided in an embodiment of the present invention; Fig.12 A schematic diagram of the structure of a gas-controlled valve core provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] See also Figure 2 and Figure 3 , which shows a schematic diagram of the structure of an energy-saving hydraulic station provided by an embodiment of the present invention. As shown in the figure, the energy-saving hydraulic station includes: a gas-liquid booster pump 1 and a control valve group 2 for controlling the reversal of the gas-liquid booster pump 1; the gas-liquid booster pump 1 includes a linked pneumatic cylinder 11 and an oil cylinder 12; the control valve group 2 includes a gas-controlled reversing valve 21, a first gas-controlled valve 22 and a second gas-controlled valve 23 which are arranged at both ends of the pneumatic cylinder 11 and are respectively triggered to open by the cylinder piston 111.

[0022] Specifically, a through hole is provided on the pneumatic cylinder 11, and the pneumatic cylinder 11 and the oil cylinder 12 are connected through the through hole. A cylinder piston 111 in contact with the inner wall is provided in the pneumatic cylinder 11, and an oil cylinder piston in contact with the inner wall is provided in the oil cylinder 12. The cylinder piston 111 and the oil cylinder piston are connected by a piston rod, and the piston rod passes through the through hole. In this embodiment, the two ends of the piston rod are respectively fixedly connected to the oil cylinder pistons 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 used as an example for explanation, and of course, a double oil cylinder can also be used, which is not limited 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 multiple 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, the pneumatic cylinder 11 outputs a pressure of 1 bar, and the oil cylinder 12 outputs a pressure of 6 bar. The interior of the pneumatic cylinder 11 is on both sides of the cylinder piston 111 (such as Figure 2 The right and left sides shown in the figure respectively form a first cylinder cavity 112 and a second cylinder cavity 113, and the position of the cylinder piston 111 is controlled by air control through the injection and exhaust of the first cylinder cavity 112 and the second cylinder cavity 113, thereby driving the oil cylinder 12 to move and realize the corresponding hydraulic drive execution action. In this embodiment, the pneumatic cylinder 11 is provided with two cavity air inlets, which are respectively connected to the first cylinder cavity 112 and the second cylinder cavity 113, so as to control the inlet and outlet of the first cylinder cavity 112 and the second cylinder cavity 113 respectively.

[0023] In this embodiment, the cavity on one side of the oil cylinder 12 (such as Figure 3 The left cavity as shown in the figure is connected with an oil inlet check valve 121 and an oil outlet check valve 122, through which the flow direction of the hydraulic oil is controlled, so that the oil in and out of the side cavity can be carried out through the pipeline where the corresponding check valve is located.

[0024] Continue to see Figures 3 to 5 The air-controlled reversing valve 21 includes an air-controlled valve housing 211 and an air-controlled valve core 212; wherein, The air control valve core 212 is arranged along the length direction of the air control valve housing 211 (eg Figure 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.

[0025] 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.

[0026] 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 right side of the figure shows the air injection, and the air control valve core 212 can slide forward in the air control valve housing 211 (as shown in FIG. Figure 5 When the slider moves to the left as shown in the figure, the slider moves to the first limit position. Figure 5 As shown, 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 and the exhaust port R are disconnected, so that the first air outlet A serves as the air inlet to inject air into the cavity connected to the first air outlet A, and the second air outlet B serves as the exhaust port R to exhaust the cavity connected to the second air outlet B.

[0027] Specifically, the positive sliding side of the air control valve core 212 (such as Figure 4After the air control unloading port Y2 is unloaded, that is, part of the cavity on the positive sliding side of the air control valve core 212 in the sliding cavity is exhausted and unloaded, the air inlet P can be placed at the right end of the sliding cavity, that is, placed on the solid part of the right end of the sliding cavity on the air control valve housing 211, and the reverse sliding side of the air control valve core 212 can be injected with air. Since the positive sliding side of the air control valve core 212 has completed unloading, the air inlet P injects air into the reverse sliding side of the air control valve core 212 so as to apply a positive sliding driving force to the air control valve core 212, so that the air control valve core 212 slides forward under the action of air pressure, that is, slides to the left, until the air control valve core 212 slides to the left end, that is, the first limit position, in the sliding cavity, and the air control valve core 212 is placed at the first limit position by the air control valve housing 211 to limit it. At this time, when the air control valve core 212 slides to the first limit position in the sliding cavity, as shown in FIG. Figure 5 As shown, 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 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 to exhaust the cavity connected to the second air outlet B, that is, the first cylinder cavity 112 is inlet, the second cylinder cavity 113 is exhausted, and the cylinder piston 111 is moved to Figure 3 The left side movement shown, i.e., the leftward movement, drives the piston of the oil cylinder 12 to move leftward, thereby causing the left cavity of the oil cylinder 12 to discharge oil, and the hydraulic oil flows upward and flows out upward after passing through the oil outlet one-way valve 122.

[0028] When the air-controlled loading port Y1 loads the forward sliding side of the air-controlled valve core 212, the air-controlled valve core 212 can slide reversely in the air-controlled valve housing 211 until it slides reversely to the second extreme position, 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 that the second air outlet B serves as the air inlet to inject air into the cavity connected to the second air outlet B, and the first air outlet A serves as the exhaust port to exhaust the cavity connected to the first air outlet A.

[0029] Specifically, the first cylinder cavity 112 is inlet, the second cylinder cavity 113 is outlet, and when the cylinder piston 111 moves to the left end, in order to achieve reversal, the positive sliding side (such as the positive sliding side) of the air control valve core can be pushed through the air control loading port Y1. Figure 4That is to say, the air-controlled loading port Y1 can inject gas into part of the cavity on the positive sliding side of the air-controlled valve core 212 in the sliding cavity. The air-controlled loading will apply a rightward loading force to the air-controlled valve core 212. The loading force is greater than the gas pressure on the reverse sliding side of the air-controlled valve core 212, so that the air-controlled valve core 212 slides in the reverse direction, i.e., slides to the right, under the action of the loading force, until the air-controlled valve core 212 slides to the right end, i.e., the second limit position, in the sliding cavity. The air-controlled valve core 212 is placed at the second limit position by the air-controlled valve housing 211 to limit it. At this time, when the air-controlled valve core 212 slides to the second limit position in the sliding cavity, as shown in FIG. Figure 4 As shown, 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 connected to the first air outlet A, 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 air from the cavity connected to the first air outlet A, that is, the first cylinder cavity 112 is exhausted, the second cylinder cavity 113 is inhaled, and the cylinder piston 111 is moved to Figure 3 The right side movement shown, i.e. rightward movement, drives the piston of the oil cylinder 12 to move rightward accordingly, so that the left cavity of the oil cylinder 12 is filled with oil, and the outside flows from bottom to top through the oil inlet check valve 121 and then flows into the left cavity of the oil cylinder. Among them, the first cylinder cavity 112 is out of gas, and the second cylinder cavity 113 is in gas. When the cylinder piston 111 moves rightward to the right end, in order to achieve reversal, the positive sliding side of the air control valve core 212 (such as Figure 4 The air intake of the air inlet P can directly push the air control valve core 212 to slide forward.

[0030] In this embodiment, the air-controlled loading port Y1 is used to connect the first air-controlled valve, and is connected to the air outlet F2 of the first air-controlled valve 22 or the air inlet F1 of the first air-controlled valve 22, so that after the first air-controlled valve 22 is triggered to open, the air outlet F2 of the first air-controlled valve 22 is connected to the air inlet F1 of the first air-controlled valve 22, and air is injected and loaded to the forward sliding side of the air-controlled valve core through the air-controlled loading port Y1; the air-controlled unloading port Y2 can be connected to the air inlet F3 of the second air-controlled valve 23, and the air outlet F4 of the second air-controlled valve 23 is connected to the outside, so that after the second air-controlled valve 23 is triggered to open, the air inlet F3 of the second air-controlled valve 23 is connected to the air outlet F4 of the second air-controlled valve 23, so as to exhaust and unload the forward sliding side of the air-controlled valve core, thereby enabling the reversing of the air-controlled reversing valve to be controlled by the first air-controlled valve 22 and the second air-controlled valve 23.

[0031] Specifically, the air control valve housing 211 is provided with two air control connection ports, namely, the air control valve inlet J and the air control valve outlet K, which are used to respectively connect the air inlet F1 of the first air control valve 22 and the air outlet F2 of the first air control valve 22. The air control valve inlet J is connected to the air control loading port Y1, the air control valve inlet J is connected to the air inlet F1 of the first air control valve 22, and the air control loading port Y1 is connected in parallel with the air injection port P and both are connected to the air source. The air-controlled valve outlet K is connected to the forward sliding side of the air-controlled valve core 212, and the air-controlled valve outlet K is connected to the air outlet F2 of the first air-controlled valve 22, so that after the first air-controlled valve 22 is triggered to open, the air inlet F1 of the first air-controlled valve 22 and the air outlet F2 of the first air-controlled valve 22 are connected to inject gas through the gas source, and the gas passes through the air-controlled loading port Y1, the air-controlled valve inlet J, the air inlet F1 of the first air-controlled valve 22, the first air-controlled valve 22, the air outlet F2 of the first air-controlled valve 22, and the air-controlled valve outlet K in sequence, and is injected into the forward sliding side of the air-controlled valve core 212, that is, injected into the second air-controlled reversing cavity 214, to realize the air injection loading of the forward sliding side of the air-controlled valve core 212, that is, the second air-controlled reversing cavity 214. After the first air-controlled valve 22 is closed and the second air-controlled valve 23 is triggered to open, the gas on the positive sliding side of the air-controlled valve core 212 can pass through the air-controlled unloading port Y2, the reversing connecting pipeline 6, the air inlet F3 of the second air-controlled valve 23, and the air outlet F4 of the second air-controlled valve 23 in sequence, and be discharged from the air outlet F4 of the second air-controlled valve 23, thereby realizing the exhaust and unloading of the positive sliding side of the air-controlled valve core 212, that is, the second air-controlled reversing cavity 214.

[0032] Continue to see Figures 2 to 5 When the cylinder piston 111 slides to the left to the left end, the first air-controlled valve 22 is triggered to open, so that the first air-controlled valve 22 is opened and connected to the air inlet F1 of the first air-controlled valve and the air outlet F2 of the first air-controlled valve. At the same time, the second air-controlled valve 23 is in a closed state, that is, the air inlet F3 of the second air-controlled valve 23 is disconnected from the air outlet F4 of the second air-controlled valve 23. At this time, the air inlet F1 of the first air-controlled valve 22 is connected to the air source, and the air source is supplied to the air control through the air outlet F2 of the first air-controlled valve 22. Inject gas into port Y1, and inject gas into the part of the cavity on the positive sliding side of the air control valve core 212 in the sliding cavity to load the gas, so that the air control valve core 212 slides in the opposite direction under the action of the loading force, until the air control valve core 212 slides to the second limit position in the sliding cavity. At this time, the second air outlet B serves as the air inlet of the second cylinder cavity 113, and the first air outlet A serves as the exhaust port of the first cylinder cavity 112, so that the first cylinder cavity 112 exhausts gas, the second cylinder cavity 113 intakes gas, and the cylinder piston 111 moves to Figure 2 As shown in the right side movement, after the cylinder piston 111 moves to the right, the first air-controlled valve 22 automatically switches to a closed state, that is, the air inlet F1 of the first air-controlled valve and the air outlet F2 of the first air-controlled valve are disconnected, stopping the air injection loading in the part of the cavity on the positive sliding side of the air-controlled valve core 212 in the sliding cavity.

[0033] Continue to see Figures 2 to 5 , the cylinder piston 111 moves rightward to the right end, triggering and opening the second air-controlled valve 23, so that the second air-controlled valve 23 is opened and connected with the air inlet F3 and the air outlet F4 of the second air-controlled valve 23. At this time, part of the cavity on the positive sliding side of the air-controlled valve core 212 in the sliding cavity flows into the second air-controlled valve 23 through the air-controlled unloading port Y2 and the air inlet F3 of the second air-controlled valve 23, and is exhausted through the air outlet F4 of the second air-controlled valve 23. In other words, part of the cavity on the positive sliding side of the air-controlled valve core 212 in the sliding cavity is exhausted and unloaded. At the same time, since the air inlet P is connected to the air source, the air injection of the air inlet P can make the air-controlled valve The core 212 slides forward under the action of air pressure until the air-controlled valve core 212 slides to the first extreme 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 can take in air and the second cylinder cavity 113 can exhaust air, and the cylinder piston 111 moves to the left. After the cylinder piston 111 moves to the left, the second air-controlled valve 23 automatically switches to a closed state, that is, the air inlet F3 of the second air-controlled valve 23 and the air outlet F4 of the second air-controlled valve 23 are disconnected, stopping the unloading and exhaust of part of the cavity on the forward sliding side of the air-controlled valve core 212 in the sliding cavity.

[0034] Continue to see Figure 4 and Figure 5 , the reverse sliding side end surface of the air control valve core 212 (such as Figure 5 The right end face shown in FIG. 1 ) and the end face corresponding to the gas control valve housing 211 (as shown in FIG. Figure 5 When there is a gap between the end face of the reverse sliding side of the air control valve core 212 and the end corresponding to the air control valve housing 211, the portion of the sliding cavity between the reverse sliding side end face of the air control valve core 212 and the end corresponding to the air control valve housing 211 serves as the first air control reversing cavity 213. Figure 4 The left end face shown in FIG. 1 ) and the end face corresponding to the air control valve housing 211 (as shown in FIG. Figure 4 When there is a gap between the left end of the air-controlled valve core 212 and the corresponding end of the air-controlled valve housing 211, the portion of the sliding cavity between the positive sliding side end surface of the air-controlled valve core 212 and the corresponding end of the air-controlled valve housing 211 serves as the second air-controlled reversing cavity 214.

[0035] Specifically, the first gas-controlled reversing cavity 213 can be injected with gas through the gas injection port P, and the second gas-controlled reversing cavity 214 can be injected with gas and loaded and exhausted and unloaded through the gas-controlled loading port Y1. In this embodiment, the cross-sectional area of ​​the first gas-controlled reversing cavity 213 is smaller than that of the second gas-controlled reversing cavity 214, so that at the same gas pressure, the force applied by the gas in the second gas-controlled reversing cavity 214 to the gas-controlled valve core 212 is greater than the force applied by the gas in the first gas-controlled reversing cavity 213 to the gas-controlled valve core 212, that is, the force on the side of the second gas-controlled reversing cavity 214 on the gas-controlled valve core 212 is greater than the force on the side of the first gas-controlled reversing cavity 213, and then when the second gas-controlled reversing cavity 214 is injected with gas and loaded, that is, when the forward sliding side of the gas-controlled valve core is loaded, the gas in the second gas-controlled reversing cavity 214 can push the gas-controlled valve core 212 to slide in the opposite direction.

[0036] In this embodiment, the air hole valve core 212 is between the two ends and close to the second end of the air hole valve core 212 (such as Figure 4 A breathing groove 215 is formed between the position of the air control valve shell 211 and the air control valve shell 211. A breathing channel 216 connected to the breathing groove 215 is provided on the air control valve shell 211 for communicating with the outside world so as to inhale and discharge gas from the breathing groove 215 when the air pore valve core 212 slides, so as to avoid the resistance of the air pore valve core 212 to the sliding caused by the gas compression in the breathing groove 215. Specifically, due to the difference in the cross-sections of the first air control reversing cavity 213 and the second air control reversing cavity 214 on both sides of the air pore valve core 212, a breathing groove 215 is formed between the air pore valve core 212 and the air control valve shell 211 when the air pore valve core 212 slides. In particular, Figure 5 As shown, when the pore valve core 212 slides to the left end, there is a breathing groove 215 with a larger space between the pore valve core 212 and the air control valve housing 211. As the pore 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 is gradually compressed, which will generate resistance to prevent the pore valve core 212 from sliding to the right. Therefore, in order to prevent the pore valve core 212 from stopping in the middle position, in this embodiment, a breathing channel 216 connected to the breathing groove 215 is provided on the air control valve housing 211 to connect with the outside world, so that the breathing groove 215 is connected with the outside world to form a space with an opening, and then air can enter and discharge with the change of the space of the breathing groove 215, avoiding the change of the air pressure in the breathing groove 215, thereby ensuring the smooth sliding of the pore valve core 212.

[0037] See also Figure 6 to Figure 7 , which shows a schematic diagram of the structure of the air-controlled valve housing and the valve housing body in the air-controlled reversing valve provided by the embodiment of the present invention. As shown in the figure, the air-controlled valve housing 211 includes: a valve housing body 2111, an inner sleeve 2112 and a plug cover 2113; wherein the valve housing body 2111 is one end (such as Figure 7The left end (as shown) is an open cylindrical structure, and the other end (as shown Figure 7 The right end shown in the figure is the closed end; the inner sleeve 2112 is sleeved inside the valve housing body 2111, and the plugging cover 2113 is arranged at the open end of the valve housing body 2111, which is used to limit and block the inner sleeve 2112. Specifically, one end of the valve housing body 2111 blocks the opening of the other end, and the inside has a mounting hole connected to the opening. The inner sleeve 2112 is placed in the mounting hole and arranged close to the closed end. The open end has a plugging cover 2113, and the plugging cover 2113 is partially placed in the mounting hole, and the end placed in the mounting hole is pressed and contacted on the end of the inner sleeve 2112, which can seal the mounting hole and limit the inner sleeve 2112, so that the inner sleeve 2112 is fixed in the valve housing body 2111. Among them, the plugging cover 2113 and the valve housing body 2111 can be fixed by clamping connection, or can be fixed by bolt connection, which is not limited in this embodiment. In this embodiment, the cross-sectional outer contour of the valve housing body 2111 may be a square structure, the mounting hole may be a circular blind hole structure, and the mounting hole is coaxially arranged with the valve housing body 2111. The inner bushing 2112 may be a cylindrical structure, the outer wall of which presses against the inner wall of the valve housing body 2111, and the inner hollow part, the closed end of the valve housing body 2111 and the plug cover 2113 are surrounded to form a slider cavity. In this embodiment, a plurality of sealing rings 7 may be provided between the valve housing body 2111 and the inner bushing 2112.

[0038] Continue to see Figures 6 to 9 The valve housing body 2111 is used as a shell structure, and 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 provided on the closed end of the valve housing body 2111, and is used to inject gas into the reverse sliding side of the air control valve core 212, so that after the forward sliding side of the air control valve core 212 is unloaded, the gas entering the air inlet P can apply a forward sliding force to the air control valve core 212, so that the air control valve core 212 can slide forward. The air inlet P can be arranged along the axial direction of the valve housing body 2111 (such as Figure 7The air inlet P can be arranged in the horizontal direction as shown in the figure, and the air inlet P can also be arranged coaxially with the valve housing body 2111 to inject air into the axial position in the inner sleeve 2112, that is, inject air along the axial direction of the air-controlled valve core 212, and apply force to the axial position of the air-controlled valve core 212 to improve the stability of the positive sliding of the air-controlled valve core 212. Among them, the air inlet P can be a through hole that penetrates the closed end of the valve housing body 2111, the right end can be connected to the air source, so as to inject air into the air inlet P through the air source, and the left end can be connected to the mounting hole inside the valve housing body 2111, so as to be connected to the sliding cavity inside the inner sleeve 2112, and then apply force to the air-controlled valve core 212 to push the air-controlled valve core 212 to slide forward. 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 through-hole structures penetrating the side walls thereof, so that the inner ends are connected to the corresponding internal structures and the outer ends are connected to the corresponding connection ports. A muffler can be arranged at the exhaust port R.

[0039] Continue to see Figure 7 , the pneumatic loading port Y1 and the pneumatic unloading port Y2 may also be provided on the valve housing body 2111. Specifically, the pneumatic unloading port Y2 may be connected to the pneumatic loading port Y1, and both may be connected to a part of the cavity on the positive sliding side of the pneumatic valve core 212 in the sliding cavity, so as to realize the gas injection loading and exhaust unloading of a part of the cavity on the positive sliding side of the pneumatic valve core 212 in the sliding cavity. Figure 2 As shown, the air-controlled unloading port Y2 and the air inlet F3 of the second air-controlled valve 23 can be connected through a reversing connecting pipeline 6, and the reversing connecting pipeline 6 can be arranged in parallel with the air cavity connecting pipeline 5, especially both can be arranged along the sliding direction of the cylinder piston 111 (such as Figure 2 In this embodiment, the first air-controlled valve 22 can be arranged on the valve housing body 2111, and the air-controlled valve inlet J and the air-controlled valve outlet K can also be arranged on the valve housing body 2111, and are connected to form a channel.

[0040] Continue to see Figures 4 to 6 and Fig.10 , the interior of the inner sleeve 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 cover 2113, so that the air-controlled valve core 212 can slide along the first sliding section 21121 and the second sliding section 21122, and the two ends of the air-controlled valve core 212 are respectively placed in the first sliding section 21121 and the second sliding section 21122, and the first end of the air-controlled valve core 212 (such as Figure 4 The right end shown in FIG. 1 is the reverse sliding side end face of the air control valve core and the closed end of the valve housing body 2111 (as shown in FIG. Figure 4When there is a gap between the first end of the air control valve core 212 and the closed end of the valve housing body 2111, the portion of the first sliding section 21121 between the first end of the air control valve core 212 and the closed end of the valve housing body 2111 serves as the first air control reversing cavity 213. Figure 4 When there is a gap between the end face of the positive sliding side of the air-controlled valve core (shown as the left end), that is, the end face of the positive sliding side of the air-controlled valve core and the plug cover 2113, the portion between the second end of the air-controlled valve core 212 and the plug cover 2113 in the second sliding section 21122 serves as the second air-controlled reversing cavity 214. Among them, the cross-sectional area of ​​the second sliding section 21122 is larger than the cross-sectional area of ​​the first sliding section 21121, so that the cross-sectional area of ​​the second air-controlled reversing cavity 214 is larger than the first air-controlled reversing cavity 213, and then the air-controlled valve core can be pushed to slide in the reverse direction when the positive sliding side of the air-controlled valve core is injected with gas and loaded. 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 air-controlled valve core 212.

[0041] In this embodiment, a breathing port D is provided on the inner sleeve 2112 , and a breathing port E connected to the breathing port D is also 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 enable the gas in the breathing groove 215 to enter or discharge.

[0042] Continue to see Figure 6 and Fig.10 The inner sleeve 2112 is provided with a first inner sleeve opening I, a second inner sleeve opening G, and a third inner sleeve opening H, which are respectively connected to the first air outlet A, the exhaust port R, and the second air outlet B, so as to realize the cut-off between the first air outlet A, the exhaust port R, the second air outlet B and the air inlet P through the cut-off control between the first inner sleeve opening I, the second inner sleeve opening G, and the third inner sleeve opening H and the air inlet P. Specifically, the first inner sleeve opening I, the second inner sleeve opening G, and the third inner sleeve opening H can be respectively placed on three sections on the inner sleeve 2112, such as Fig.10As shown, from right to left, the first liner opening I, the second liner opening G, and the third liner opening H are sequentially arranged on the three thin cylinder sections on the inner liner sleeve 2112. For example, the first thin cylinder section is provided with two circles of first liner openings I on the left and right, and the two circles of first liner openings I are staggered along the circumference of the first thin cylinder section, and the outer circle of the first thin cylinder section has a first liner ring groove along its circumference, and each first liner opening I is connected to the first liner ring groove; the second thin cylinder section is provided with a circle of second liner openings G, and the outer circle of the first thin cylinder section has a second liner ring groove along its circumference. Liner ring groove, each second liner opening G is connected to the second liner ring groove; the third thin cylinder section is provided with two left and right circles of third liner opening H, and the two circles of third liner opening H can be staggered along the circumference of the third thin cylinder section, the outer circle of the third thin cylinder section has a third liner ring groove along its circumference, each third liner opening H is connected to the third liner ring groove, and the first liner ring groove, the second liner ring groove and the third liner ring groove are separated by a partition, that is, the first liner opening I, the second liner opening G and the third liner opening H are not connected to each other.

[0043] In this embodiment, a plurality of sealing grooves are provided on the inner sleeve 2112 to limit the position of the sealing ring.

[0044] Continue to see Figure 6 and Fig.11 The plugging cover 2113 is provided with an air-controlled reversing port C for connecting to the air outlet F2 of the first air-controlled valve 22, so that the gas injected from the air-controlled loading port Y1 can flow to the air-controlled reversing port C through the air outlet F2 of the first air-controlled valve 22, and be discharged from the air-controlled reversing port C to the positive sliding side of the air-controlled valve core 212. Specifically, the air-controlled reversing port C can be arranged along the axial direction of the plugging cover 2113, and the plugging cover 2113, the inner sleeve 2112, the valve housing body 2111 and the air-controlled valve core 212 are all coaxially arranged, so that the exhaust at the air-controlled reversing port C can apply a force to the air-controlled valve core 212 along the axial direction of the air-controlled valve core 212, so that the air-controlled valve core 212 can slide in the reverse direction.

[0045] Continue to see Figure 4 , Figure 5 and Fig.12 The air control valve core 212 is adapted to the first sliding section 21121, and the first end of the air control valve core 212 (such as Figure 4 The first sliding section 21121 is slidably disposed in the first sliding section 21121. The first sliding section 21121 is provided between the first end of the air control valve core 212 and the blocking end of the valve housing body 211 (such as Figure 4 The first air-controlled reversing cavity 213 is formed between the second end of the air-controlled valve core 212 (as shown in the right end) and the second end of the air-controlled valve core 212 (as shown in the right end). Fig.12The left end of the second sliding section 21122 is provided with a sliding plate 2121 adapted to the second sliding section 21122. The sliding plate 2121 is slidably arranged in the second sliding section 21122, and a second air-controlled reversing cavity 214 is formed between the sliding plate 2121 and the blocking cover 2113 in the second sliding section 21122.

[0046] Specifically, when the air-controlled valve core 212 slides forward in the inner sleeve 2112 to the first limit position, the second end of the air-controlled valve core 212 presses against the plugging cover 2113, and the first limit position is limited by the plugging cover 2113. When the air-controlled valve core 212 slides reversely in the inner sleeve 2112 to the second limit position, the first end of the air-controlled valve core 212 presses against the blocking end of the valve housing body 2111, and the second end of the air-controlled valve core 212 presses against the step surface between the first sliding section 21121 and the second sliding section 21122, that is, the second limit position is limited by the step surface between the blocking end of the valve housing body 2111, the first sliding section 21121 and the second sliding section 21122.

[0047] Continue to see Figure 4 , Figure 5 and Fig.12 The first end of the air control valve core 212 is provided with a first cut-off limit plate 2122. The air control valve core 212 is provided on one side of the first cut-off limit plate 2122 (such as Fig.12 A second cut-off limit plate 2123 is also provided (as shown on the left side), and the air control valve core 212 has an outer peripheral switching channel 2124 between the first cut-off limit plate 2122 and the second cut-off limit plate 2123 in the circumferential direction.

[0048] Specifically, the outer diameter of the air control valve core 212 is smaller than the inner diameter of the inner sleeve 2112, and the outer diameters of the first cut-off limit plate 2122 and the second cut-off limit plate 2123 can be adapted to the inner diameter of the inner sleeve 2112 so as to be slidably connected inside the inner sleeve 2112. A groove is formed on the outer periphery of the air control valve core 212 between the first cut-off limit plate 2122 and the second cut-off limit plate 2123, and an outer peripheral switching channel 2124 is formed between the groove and the inner wall of the inner sleeve 2112. In this embodiment, the second cut-off limit plate 2123 is opposite to the side of the first cut-off limit plate 2122 (such as Fig.12The left side shown in the figure is also provided with a support plate 2125, the outer diameter of the support plate 2125 can be adapted to the inner diameter of the inner sleeve 2112 so as to be slidably connected to the inside of the inner sleeve 2112; the outer periphery of the air-controlled valve core 212 forms a connecting channel 2126 between the support plate 2125 and the second cut-off limit plate 2123, that is, the outer periphery of the air-controlled valve core 212 forms a groove between the support plate 2125 and the second cut-off limit plate 2123, and a connecting channel 2126 is formed between the groove and the inner wall of the inner sleeve 2112, and the connecting channel 2126 is used to connect the gas injection port P and the second gas outlet B, so that the second gas outlet B can be used as the gas inlet of the second cylinder cavity 113, so that the second cylinder cavity 113 can take in air.

[0049] In this embodiment, an air passage 217 is provided in the air control valve core 212, and an air inlet is provided on a first end surface of the air control valve core 212 (such as Fig.12 On the right end face shown in the figure, it is used to connect the air inlet P so that the gas injected from the air injection port P can flow into the air path channel 217; on the outer peripheral side wall of the air control valve core 212, there is a vent hole 2128 connected to the air inlet channel 2127. When the air control valve core 212 slides reversely to the second extreme position, the vent hole 2128 is connected to the second air outlet B, and the air inlet of the air path channel 217 is connected to the air inlet P to achieve the connection between the air inlet P and the second air outlet B. Specifically, the air intake channel 2127 can be a blind hole arranged axially along the air control valve core 212, and the air vent 2128 can be set at a position where the air intake channel 2127 is provided inside, especially between the support plate 2125 and the second cut-off limit plate 2123, and is connected with the air intake channel 2127 inside and can be connected with the connecting channel 2126 outside, that is, the air vent 2128 is connected with the third liner port H, so that the gas in the air path channel 217 can flow out from the air vent 2128, and flow through the third liner port H and the second air outlet B in sequence, so as to flow into the second cylinder cavity 113, thereby realizing the air intake in the second cylinder cavity 113.

[0050] like Figure 5As shown, when the air control valve core 212 slides forward to the first limit position in the inner sleeve 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 gas 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 peripheral switching channel 2124, so that the second inner liner port G and the third inner liner port H are connected through the peripheral switching channel 2124, and then the exhaust port R is connected with the second gas outlet B, so as to exhaust the second cylinder cavity 113. At the same time, the support plate 2125 and the connecting channel 2126 are placed on the left side of the third inner liner port H, and the connecting channel 2126 is disconnected from the third inner liner port H. In this embodiment, when the air control valve core 212 slides forward to the first limit position in the inner sleeve 2112, the support plate 2125 is located on the left side of the third inner liner port H and presses against the inner wall of the first sliding section 21121. At this time, the connecting channel 2126 is 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. The first inner liner port I is fully opened, that is, the first inner liner port I is connected to the first air control reversing cavity 213. Since the connecting channel 2126 is closed and the first inner liner port I is open, the gas injection port P is connected to the gas source. After the gas is discharged from the gas injection port P, it flows into the first air control reversing cavity 213. The gas flows from the first inner liner port I to the first gas outlet A, and then flows from the first gas outlet A to the first cylinder cavity 112, so as to realize the gas injection in the first cylinder cavity 112.

[0051] like Figure 4 As shown, when the air control valve core 212 slides in the inner sleeve 2112 in the reverse direction to the second limit position, the first cut-off limit plate 2122 is placed on the side of the first inner liner opening I facing away from the second inner liner opening G (as shown in FIG. Figure 4 The right side shown in FIG. 10A ) and the sealing end of the valve housing body 2111 (as shown in FIG. 10B ) is pressed against the sealing end of the valve housing body 2111 (as shown in FIG. Figure 4As shown in the right end of the figure, the second cut-off limiting plate 2123 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 then 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 2124, so as to realize the connection between the first liner port I and the second liner port G through the peripheral switching channel 2124, and then realize the connection between the first air outlet A and the exhaust port R, and realize 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 liner port H, and the second cut-off limiting plate 2123 is placed on the right side of the third liner port H, so that the connecting channel 2126 is connected to the third liner port H. Due to the gas injection loading in the second gas-controlled reversing cavity 214, the gas cannot push the gas-controlled valve core 212 to slide forward after being discharged from the gas injection port P. Therefore, the gas can only flow into the air inlet channel 2127 and enter the connecting channel 2126 from the air vent 2128, and then flow through the third liner port H and the second air outlet B in sequence, and flow into the second cylinder cavity 113, thereby realizing gas injection in the second cylinder cavity 113.

[0052] In this embodiment, a sealing groove is provided on the sliding plate 2121, and the first cutting limit plate 2122, the second cutting limit plate 2123, and the support plate 2125 are all multiple, for example, they can be three, and a sealing groove is formed between two adjacent ones, that is, a sealing groove is formed between two adjacent first cutting limit plates 2122, a sealing groove is formed between two adjacent second cutting limit plates 2123, and a sealing groove is formed between two adjacent support plates 2125.

[0053] The working process of this energy-saving hydraulic station: like Figure 2 As shown, when the cylinder piston 111 slides to the left, there is a gap between the cylinder piston 111 and the second air-controlled valve 23 on the right, and the second air-controlled valve 23 is reset to a closed state, so that the air inlet F3 of the second air-controlled valve 23 is disconnected from the air outlet F4 of the second air-controlled valve 23; when the cylinder piston 111 slides to the left to the left end, the first air-controlled valve 22 is triggered to open, so that the first air-controlled valve 22 is opened and connected to the air inlet F1 of the first air-controlled valve 22 and the air outlet F2 of the first air-controlled valve 22; Figure 4As shown, the air-controlled loading port Y1 is connected to the air source, and the gas flows into the first air-controlled valve 22 from the air-controlled loading port Y1 and flows through the air-controlled valve inlet J and the air inlet F1 of the first air-controlled valve 22, and flows through the air outlet F2 of the first air-controlled valve 22 and the air-controlled valve outlet K to the air-controlled reversing port C, and is discharged from the air-controlled reversing port C. The discharged gas exerts a rightward force on the left end surface of the sliding plate 2121 of the air-controlled valve core 212. Since the cross-section of the cavity on the left side of the air-controlled valve core 212, i.e., the second air-controlled reversing cavity 214, is larger than the cross-section of the first air-controlled reversing cavity 213 of the cavity on the right side of the air-controlled valve core 212, Therefore, the force on the second air-controlled reversing cavity 214 side of the air-controlled valve core 212 is greater than the force on the right side of the first air-controlled reversing cavity 213, which can push the air-controlled valve core 212 to slide in the opposite direction, that is, to slide to the right. There is a gap between the sliding plate 2121 and the plugging cover 2113 in the second sliding section 21122 and the gap gradually increases. The part between the sliding plate 2121 and the plugging cover 2113 in the second sliding section 21122 serves as the second air-controlled reversing cavity 214 until the air-controlled valve core 212 slides to the right until the right end of the air-controlled valve core 212 is pressed against the closed end of the valve housing body 2111, that is, at the second extreme position. Figure 4 At the position shown, the air control valve core 212 stops sliding. At this time, the first liner port I and the second liner port G are both connected to the peripheral switching channel 2124, and the third liner port H is connected to the connecting channel 2126; due to the gas injection loading in the second air control switching cavity 214, the gas injection port P is connected to the gas source, and the gas cannot push the air control valve core 212 to slide forward, that is, to the left after being discharged from the gas injection port P. The gas flows into the air inlet channel 2127, and enters the connecting channel 2126 from the air vent 2128, and then flows through the third liner port H and the second gas outlet B in sequence, and flows into the second cylinder cavity 113, realizing the second Injection of gas into the cylinder cavity 113; the first liner port I and the second liner port G are both connected to the peripheral switching channel 2124, so that the gas in the first cylinder cavity 112 can flow in from the first gas outlet A, and flow from the first liner port I to the peripheral switching channel 2124, and flow through the second liner port G and the exhaust port R in sequence, and be discharged from the exhaust port R, so as to achieve exhaust of the first cylinder cavity 112; that is, the second cylinder cavity 113 can be inlet with air, and the compressed air pushes the cylinder piston 111 to move rightward, and the first cylinder cavity 112 is exhausted; When the cylinder piston 111 slides to the right, there is a gap between the cylinder piston 111 and the first air-controlled valve 22 on the left, and the first air-controlled valve 22 is reset to a closed state, so that the air inlet F1 of the first air-controlled valve 22 and the air outlet F2 of the first air-controlled valve 22 are disconnected; when the cylinder piston 111 slides to the right end, the second air-controlled valve 23 is triggered to open, so that the air inlet F3 of the second air-controlled valve 23 is connected with the air outlet F4 of the second air-controlled valve 23, and the gas in the second air-controlled reversing cavity 214 flows out from the air-controlled reversing port C, flows through the air-controlled unloading port Y2 and the air inlet F3 of the second air-controlled valve 23, flows into the second air-controlled valve 23, and is discharged from the air outlet F4 of the second air-controlled valve 23, thereby realizing the unloading of the second air-controlled reversing cavity 214. The air pressure in the second air-controlled reversing chamber 214 gradually decreases. During the unloading process, the air source connected to the air injection port P continues to inject air, and the air injection port P continues to apply a leftward force to the air-controlled valve core 212. Therefore, as the second air-controlled reversing chamber 214 is unloaded, the gas injected by the air injection port P can push the air-controlled valve core 212 to slide leftward, and there is a gap between the right end of the air-controlled valve core 212 and the closed end of the valve shell body 2111, and the gap gradually increases. The part between the right end of the air-controlled valve core 212 and the closed end of the valve shell body 2111 in the first sliding section 21121 serves as the first air-controlled reversing chamber 213, until it slides to the left end, that is, the left end face of the sliding plate 2121 is pressed and contacted with the blocking cover 2113, that is, at the first extreme position. Figure 5 At the position shown, the air control valve core 212 stops sliding. At this time, the first cut-off limit plate 2122 is located between the first liner port I and the second liner port G, the first liner port I is fully opened and connected to the first air control reversing cavity 213, because the connecting channel 2126 is closed, and the first liner port I is open, the gas injected from the gas source connected to the gas injection port P is discharged from the gas injection port P, and flows into the first air control reversing cavity 213, the gas flows from the first liner port I to the first gas outlet A, and then flows from the first gas outlet A to the first cylinder cavity 112, realizing the first cylinder cavity 1 12 is injected with air; when the air control valve core 212 is located at the first extreme position, the second liner port G and the third liner port H are both connected with the peripheral switching channel 2124, so that the compressed gas in the second cylinder cavity 113 can flow from the second air outlet B to the third liner port H, and flow through the peripheral switching channel 2124 and the second liner port G, and flow to the exhaust port R to be discharged from the exhaust port R; that is, the first cylinder cavity 112 is air-intaken, the compressed air pushes the cylinder piston 111 to move to the left, and the second cylinder cavity 113 is exhausted.

[0054] In summary, the energy-saving hydraulic station and the air-controlled reversing valve provided in this embodiment unload the forward sliding side of the air-controlled valve core 212 through the air-controlled unloading port Y2. When the air inlet P injects air into the reverse sliding side of the air-controlled valve core 212, the air-controlled valve core 212 can slide forward in the air-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 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 air inlet to inject air into the cavity connected to the first air outlet A. Port B serves as the exhaust port R to exhaust the cavity connected to the second air outlet B; and the forward sliding side of the air control valve core is loaded through the air control loading port Y1, so that the air control valve core 212 can slide reversely in the air control valve housing 211 until it slides reversely to the second extreme 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 through the second air outlet B as the air inlet, and the first air outlet A serves as the exhaust port R to exhaust the cavity connected to the first air outlet A. Therefore, the energy-saving hydraulic station and the pneumatically controlled reversing valve are respectively used to load and unload the forward sliding side of the pneumatically controlled valve core 212 through the pneumatically controlled loading port Y1 and the pneumatically controlled unloading port Y2. The stability and continuity of the reverse sliding of the pneumatically controlled valve core 212 can be achieved through loading, and the resistance to the forward sliding of the pneumatically controlled valve core 212 can be reduced through unloading, thereby avoiding the pneumatically controlled valve core 212 from getting stuck during the reversing process and avoiding the pneumatically controlled valve core 212 from stopping in the middle position.

[0055] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0056] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pneumatically controlled reversing valve, Features: 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, Features: 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. A pneumatically controlled reversing valve according to claim 2, Features: 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, Features: A cross-sectional area of ​​the second sliding section is greater than a cross-sectional area of ​​the first sliding section.

5. The gas-controlled reversing valve according to claim 2, Features: 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, Features: 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 gas-controlled reversing valve according to claim 2, Features: 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 gas-controlled reversing valve according to any one of claims 1 to 7, Features: 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 gas-controlled reversing valve according to any one of claims 1 to 7, Features: A breathing groove is formed between the two ends of the air pore valve core and the position close to the second end of the air pore valve core and the air control valve shell. A breathing port connected to the breathing groove is provided on the air control valve shell for connecting to the outside world so as to inhale and discharge gas from the breathing groove when the air pore valve core slides.

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

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