Reversing valve element, reversing valve with same and hydraulic station

Abstract

The invention provides a valve element of a reversing valve, the reversing valve with the valve element and a hydraulic station. The reversing valve element comprises a main air inlet section, a first exhaust section, a second exhaust section, a first working section and a second working section. An auxiliary exhaust valve element is arranged in the reversing valve element. When the first working section is communicated with the main air inlet section and the second working section is communicated with the second exhaust section, the auxiliary exhaust valve element is communicated with the second working section and the second exhaust section; when the second working section communicates with the main air inlet section and the first working section communicates with the first exhaust section, the auxiliary exhaust valve element communicates with the first working section and the first exhaust section. Through the arrangement of the auxiliary exhaust valve element in the reversing valve element, communication between the second working section and the second exhaust section or communication between the first working section and the first exhaust section is switched, so that auxiliary exhaust is conducted on the first working section or the second working section, then auxiliary exhaust is conducted on the two air cavities of the air cylinder, and blocking and stopping of a piston of the air cylinder are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic stations, and in particular to a reversing valve core, a reversing valve having the valve core, and a hydraulic station. Background Art

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

[0003] See also Figure 1 , which is a structural diagram of a hydraulic station provided in the prior art. As shown in the figure, the hydraulic station comprises: a linked air cylinder 1' and an oil cylinder 2'; wherein, the cylinder end covers on both sides of the air cylinder 1' are respectively provided with a first reversing trigger device 5' and a second reversing trigger device 6', and at the same time, the air cylinder 1' is connected to a reversing valve 3', and the air source is respectively connected to the first reversing trigger device 5', the second reversing trigger device 6' and the air inlet of the reversing valve 3'; the A' outlet of the reversing valve 3' is connected to one side of the cylinder 1', and the B' outlet of the reversing valve 3' is connected to the air inlet of the reversing valve 3'. The air port is connected to the other side of the cylinder 1'; the first reversing trigger device 5' is connected to the reversing valve 3' to control the reversing valve 3' to start the A' air outlet of the reversing valve 3', so that the A' air outlet of the reversing valve 3' is connected to the P' air inlet of the reversing valve 3'; the second reversing trigger device 6' is connected to the reversing valve 3' to control the reversing valve 3' to start the B' air outlet of the reversing valve 3', so that the B' air outlet of the reversing valve 3' is connected to the P' air inlet of the reversing valve 3'.

[0004] The working process of the above energy-saving hydraulic station is as follows: the pneumatic piston is located on the left side of the cylinder 1', triggering the first reversing trigger device 5' to open, pushing the reversing valve 3' to reverse, and the compressed air enters the cylinder 1' from the A' outlet, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to move to the right (the first reversing trigger device 5' is reset and cut off), driving the cylinder piston in the oil cylinder 2' to move to the right; the pneumatic piston moves to the right side of the cylinder 1', triggering the second reversing trigger device 6' to open, pushing the reversing valve 3' to reverse, and the compressed air The air enters the cylinder 1' 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 reversing trigger device 6' is reset and cut off), driving the cylinder piston in the oil cylinder 2' to move leftward, so that the hydraulic oil goes in and out; the cylinder 1' reciprocates to form a continuous hydraulic output. When the set pressure is reached, the cylinder 1' stops moving to keep the pressure constant. The cylinder 1' remains in a pressurized state and stops moving, so that compressed air is no longer consumed. Compared with traditional hydraulic stations, energy consumption and heat generation are reduced, thereby achieving energy saving.

[0005] In the factory use environment, the above-mentioned hydraulic station is generally provided with an elastic core shaft on the cylinder end cover. When the pneumatic piston moves to the end, the core shaft is squeezed to move, triggering the reversing trigger device to make the reversing valve reverse, thereby reversing the cylinder piston. Such a reciprocating cycle drives the cylinder to continuously supply oil. The reversing trigger device can be an electromagnetic induction switch, an electromagnetic contact switch or a mechanical valve, etc. The reversing trigger device has a certain trigger stroke. When the air source pressure drops or fluctuates greatly, for example, there are other air-using units (air blowing guns, etc.) on the air line, resulting in unstable air source pressure, low air supply pressure, and the core shaft cannot move to reach the trigger stroke. The reversing valve cannot be reversed normally, and the cylinder piston becomes stuck, resulting in the cylinder being unable to continuously supply oil. Summary of the invention

[0006] In view of this, the present invention proposes a reversing valve core, a reversing valve having the valve core, and a hydraulic station, aiming to solve the problem of cylinder jamming in the existing hydraulic station.

[0007] On the one hand, the present invention proposes a reversing valve core, including a main air intake section that can be connected to the first air intake port on the reversing valve body, a first exhaust section and a second exhaust section that can be connected to the reversing exhaust port on the reversing valve body, a first working section that can be connected to the first working port on the reversing valve body, and a second working section that can be connected to the second working port on the reversing valve body; an auxiliary exhaust chamber is provided inside the reversing valve core, and an auxiliary exhaust valve core is provided in the auxiliary exhaust chamber; when the first working section is connected to the main air intake section and the second working section is connected to the second exhaust section, the auxiliary exhaust valve core connects the second working section and the second exhaust section; when the second working section is connected to the main air intake section and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core connects the first working section and the first exhaust section.

[0008] Furthermore, the above-mentioned reversing valve core has a first auxiliary air inlet and a first auxiliary exhaust port connected to the auxiliary exhaust chamber respectively formed on the first working section and the first exhaust section; and a second auxiliary air inlet and a second auxiliary exhaust port connected to the auxiliary exhaust chamber respectively formed on the second working section and the second exhaust section.

[0009] Further, the above-mentioned reversing valve core, the auxiliary exhaust cavity includes: a first auxiliary exhaust section, an auxiliary exhaust reversing section and a second auxiliary exhaust section which are arranged in sequence; wherein the auxiliary exhaust valve core can be slidably arranged in the exhaust reversing section; the first auxiliary exhaust port is connected to the first auxiliary exhaust section, and the second auxiliary exhaust port is connected to the second auxiliary exhaust section; the first auxiliary air inlet and the second auxiliary air inlet are arranged on the cavity wall of the auxiliary exhaust reversing section, and when the first working section is connected to the main air inlet section and the second working section is connected to the second exhaust section, the auxiliary exhaust valve core slides to the second state where the second auxiliary air inlet is connected to the second auxiliary exhaust port; when the second working section is connected to the main air inlet section and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core slides to the first state where the first auxiliary air inlet is connected to the first auxiliary exhaust port.

[0010] Furthermore, the above-mentioned reversing valve core, the auxiliary exhaust valve core includes: a valve core body, a first switching rod and a second switching rod respectively arranged on both sides of the valve core body; wherein, the valve core body can slide along the inner wall of the auxiliary exhaust reversing section and form an airtight seal with the inner wall of the auxiliary exhaust reversing section; the first switching rod is driven by the valve core body to realize the on-off switching between the first auxiliary air inlet and the first auxiliary exhaust port; the second switching rod is driven by the valve core body to realize the on-off switching between the second auxiliary air inlet and the second auxiliary exhaust port.

[0011] Furthermore, with respect to the above-mentioned reversing valve core, a first switching chamber adapted to the first switching rod is provided between the auxiliary exhaust reversing section and the first auxiliary exhaust section, and the first auxiliary air inlet is provided on the chamber wall of the first switching chamber; a second switching chamber adapted to the second switching rod is provided between the auxiliary exhaust reversing section and the second auxiliary exhaust section, and the second auxiliary air inlet is provided on the chamber wall of the second switching chamber.

[0012] Furthermore, in the above-mentioned reversing valve core, the radial dimension of the valve core body is larger than the radial dimension of the first switching rod and the second switching rod, and its two end surfaces form an action surface. The compressed gas coming in from the first auxiliary air inlet or the second auxiliary air inlet acts on the action surface to push the auxiliary exhaust valve core to slide.

[0013] Furthermore, with respect to the reversing valve core mentioned above, a first sealing ring is sleeved on the first switching rod, and the first sealing ring can slide along with the first switching rod to realize on-off switching between the first auxiliary air inlet and the first auxiliary exhaust port; a second sealing ring is sleeved on the second switching rod, and the second sealing ring can slide along with the second switching rod to realize on-off switching between the second auxiliary air inlet and the second auxiliary exhaust port.

[0014] Furthermore, with respect to the above-mentioned reversing valve core, when the reversing valve core is in a neutral position so that the first working section is intaked with air and the second working section is not exhausting air, the auxiliary exhaust valve core connects the first working section and the first exhaust section to realize the connection between the first working port and the reversing exhaust port; when the reversing valve core is in a neutral position so that the second working section is intaked with air and the first working section is not exhausting air, the auxiliary exhaust valve core connects the second working section and the second exhaust section to realize the connection between the second working port and the reversing exhaust port.

[0015] On the other hand, the present invention also provides a reversing valve having the reversing valve core.

[0016] On the other hand, the present invention also provides an energy-saving hydraulic station having a reversing valve.

[0017] The reversing valve core, reversing valve and energy-saving hydraulic station provided by the present invention can switch the reversing valve core in different states through the setting of the auxiliary exhaust valve core in the reversing valve core. When the first working section is connected with the main air intake section and the second working section is connected with the second exhaust section, the auxiliary exhaust valve core is connected with the second working section and the second exhaust section, and the second working section is auxiliary exhausted, that is, the second air cavity is auxiliary exhausted, so that the cylinder piston moves to the side where the second air cavity is located under the action of the air pressure in the first air cavity, so as to trigger the second reversing trigger device, so that the reversing valve is switched into place, and the reversing valve is controlled to be switched until the second working section is connected with the main air intake section and the first working section is connected with the first exhaust section. In particular, when the air source pressure drops or fluctuates greatly, the reversing valve can be switched to the state where the second working section is connected with the main air intake section and the first working section is connected with the first exhaust section, that is, the state where the second air cavity is intaked and the first air cavity is exhausted, so as to avoid the cylinder from being stuck, that is, to avoid the cylinder piston stopping and no longer moving. Output hydraulic pressure, resulting in loss of pressure on the tooling, resulting in the occurrence of phenomena such as the workpiece being loosely clamped or the tool being hit; when the second working section is connected to the main air intake section and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core is connected to the first working section and the first exhaust section, and auxiliary exhaust is performed on the first working section, that is, the first air cavity is auxiliary exhausted, so that the cylinder piston moves to the side where the first air cavity is located under the action of the air pressure in the second air cavity, so as to trigger the second reversing trigger device, so that the reversing valve is reversed into place, and the reversing valve is controlled to be reversed until the second working section is connected to the main air intake section and the first working section is connected to the first exhaust section, especially when the air source pressure drops or fluctuates greatly, the reversing valve can switch to the state where the second working section is connected to the main air intake section and the first working section is connected to the first exhaust section, that is, the state where the first air cavity is inhaled and the second air cavity is exhausted, to avoid the cylinder from getting stuck, that is, to avoid the cylinder piston from stopping moving and no longer outputting hydraulic pressure, resulting in loss of pressure on the tooling, resulting in the occurrence of phenomena such as the workpiece being loosely clamped or the tool being hit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 hydraulic station provided in the prior art; Figure 2 It is a structural schematic diagram of the reversing valve in the stuck state provided in the prior art; Figure 3 A schematic diagram of the structure of a hydraulic station provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a reversing valve provided in an embodiment of the present invention; Figure 5 Another structural schematic diagram of a hydraulic station provided by an embodiment of the present invention; Figure 6 Another structural schematic diagram of the reversing valve provided in an embodiment of the present invention; Figure 7 A schematic diagram of the structure in which the valve core of the reversing valve in the double-sided gas-controlled reversing valve provided by an embodiment of the present invention moves to the left end, wherein the auxiliary exhaust valve core is in the first state; Figure 8 A schematic diagram of the structure between the reversing valve core and the auxiliary exhaust valve core provided in an embodiment of the present invention, wherein the auxiliary exhaust valve core is in a first state; Fig. 9 for Figure 8 A partial enlarged view of the M in the middle; Fig.10 for Figure 8 A local enlarged view of the N position in the middle; Fig.11 A structural schematic diagram of a reversing valve core in a double-sided gas-controlled reversing valve provided in an embodiment of the present invention moving rightward to a position where the first working port is just opened for air intake and the second working port is closed for exhaust; Fig.12 for Fig.11 A partial enlarged view of the O in the middle; Fig.13 for Fig.11 A partial enlarged view of the middle Q; Fig.14 for Fig.11 A partial enlarged view of the middle T; Fig.15 A schematic diagram of the structure of a reversing valve core in a double-sided gas-controlled reversing valve provided by an embodiment of the present invention moving rightward to the right end, wherein the auxiliary exhaust valve core is in a second state; Fig.16A schematic diagram of the structure between the reversing valve core and the auxiliary exhaust valve core provided in an embodiment of the present invention, wherein the auxiliary exhaust valve core is in a second state; Fig.17 A structural schematic diagram of a reversing valve core in a double-sided gas-controlled reversing valve provided in an embodiment of the present invention moving leftward to a position where the second working port is just opened for air intake and the first working port is closed for exhaust; Fig.18 for Fig.17 A partial enlarged view of the U in the middle; Fig.19 for Fig.17 A partial enlarged view of the middle V; Explanation of the reference numerals: 1-cylinder, 11-cylinder piston, 12-first air chamber, 13-second air chamber, 2-oil cylinder, 21-oil cylinder piston, 3-reversing valve, P-first air inlet, A-first working port, B-second working port, R1-first reversing exhaust port, R2-second reversing exhaust port, Y1-first control port, Y2-second control port, Z-third control port, 31-reversing valve body, 311-reversing switching chamber, 32-reversing valve core, 321-auxiliary exhaust chamber, 3211-first auxiliary exhaust section, 3212-auxiliary exhaust reversing section, 3213-second auxiliary exhaust section, 3214-first switching chamber, 3215-first gap, 3216-second switching chamber, 3217-second gap , 322-first limiting part, 323-second limiting part, 324-first exhaust section, 325-first working section, 326-main air intake section, 327-second working section, 328-second exhaust section, G-first auxiliary air intake port, H-second auxiliary air intake port, S1-first auxiliary exhaust port, S2-second auxiliary exhaust port, 33-auxiliary exhaust valve core, 331-valve core body, 332-first switching rod, 333-second switching rod, 34-first sealing ring, 35-second sealing ring, 36-third sealing ring, 4-linking rod, 5-first reversing trigger device, E-second air intake port, C-third exhaust port, 6-second reversing trigger device, F-third air intake port, D-fourth exhaust port, 7-reset spring. DETAILED DESCRIPTION

[0019] 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.

[0020] It is well known in the art that in order to avoid exhausting the cavities on both sides of the cylinder at the same time, the reversing valve 3' has the characteristic of first in and last out, that is, the communication port corresponding to the air inlet is connected first, while the communication port corresponding to the exhaust port is connected later.

[0021] like Figure 2 As shown, when the reversing valve core is pushed to move to the right, that is, port A' switches from air intake to exhaust, and port B' switches from exhaust to air intake, when the air intake of port A' is closed and the exhaust is not yet opened, the exhaust of port B' is closed, and the air intake is just opened, that is, port B' has just taken in air, and the air intake and exhaust of port A' are both closed. Since the pressure of the air cavity connected to port A' is relatively large, the air cavity connected to port B' takes in air from port B', causing pressure in the cylinders at both ends, and the pilot valve corresponding to the air cavity connected to port B' is reset and closed, or the air source pressure decreases, etc., which makes the air pressure that pushes the reversing valve core to move to the right decrease, causing the reversing valve to stop. The reversing valve stops, causing the cylinder piston to stop moving, resulting in no more hydraulic output, and the tooling loses pressure, resulting in problems such as the workpiece not being clamped tightly and the tool hitting.

[0022] See also Figure 3 and Figure 5 , which respectively show two structural schematic diagrams of the hydraulic station provided by the embodiments of the present invention. As shown in the figure, the hydraulic station includes: a cylinder 1, an oil cylinder 2, a reversing trigger device and a reversing valve 3; wherein, The oil cylinder piston of the oil cylinder 2 is connected to the cylinder piston 11 of the air cylinder 1 through a linkage rod 4, and the linkage rod 4 is slidably arranged in the cylinder 1 and is arranged near the cylinder end cover of the oil cylinder 2 (such as Figure 3 The left cylinder end cover shown in the figure) allows the cylinder piston to slide synchronously with the cylinder piston 11, so as to control the clamping and loosening of the machine tool clamping fixture by the inlet and outlet oil.

[0023] Specifically, a through hole is provided on the cylinder 1, and the cylinder 1 and the oil cylinder 2 are connected through the through hole. A cylinder piston 11 in contact with the inner wall is provided in the cylinder 1, and an oil cylinder piston 21 in contact with the inner wall is provided in the oil cylinder 2. The cylinder piston 11 and the oil cylinder piston 21 are connected by a linkage rod 4, and the linkage rod 4 passes through the through hole. In this embodiment, the two ends of the linkage rod 4 are respectively fixedly connected to the cylinder piston 11 and the oil cylinder piston 21 to realize the linkage between the cylinder 1 and the oil cylinder 2. 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. There is no limitation on it in this embodiment. In this embodiment, the piston area of ​​the cylinder piston 11 is larger than the piston area of ​​the oil cylinder piston. In this embodiment, the piston area of ​​the cylinder piston 11 can be multiple times larger than the piston area of ​​the oil cylinder piston 21, so as to facilitate the calculation of pressure. For example, the piston area of ​​the cylinder piston 11 is 6 times the piston area of ​​the oil cylinder piston 21, and the cylinder 1 outputs a pressure of 1 bar, and the oil cylinder 2 outputs a pressure of 6 bar.

[0024] The cylinder 1 is provided with a reversing trigger device for sensing whether the cylinder piston 11 of the cylinder 1 has moved into position and sending a signal indicating that the cylinder piston 11 has moved into position. The reversing valve 3 is switched based on the signal of the reversing trigger device. Specifically, there may be two reversing trigger devices, namely, a first reversing trigger device 5 and a second reversing trigger device 6, which are respectively arranged at the two ends of the cylinder 1 to respectively obtain whether the cylinder piston 11 moves to the two ends and is capable of sending a corresponding moving-in-place signal when the cylinder piston 11 moves to the two ends. The reversing valve 3 is connected to the reversing trigger device, and switches the air intake and air outlet of the first air chamber 12 and the second air chamber 13 of the cylinder 1 in sequence according to the moving-in-place signal sent by the first reversing trigger device 5 or the second reversing trigger device 6. In this embodiment, the reversing trigger device may be a pneumatically controlled mechanical valve, and the pneumatically controlled signal is used as a moving-in-place signal to control the reversing valve 3 to perform reversal; it may also be other valves such as a solenoid valve, and when the cylinder piston 11 moves to the position, an electrical signal may be sent to the reversing valve 3, and the reversing valve 3 performs reversal based on the electrical signal to switch the air intake and air outlet of the first air chamber 12 and the second air chamber 13. In this embodiment, a pneumatically controlled mechanical valve is used as an example for explanation, and the solenoid valve may refer to a pneumatically controlled mechanical valve.

[0025] The reversing valve 3 includes: a first air inlet P, a reversing exhaust port, a first working port A and a second working port B which are respectively connected to the first air cavity 12 and the second air cavity 13 on both sides of the piston of the cylinder 1. The reversing valve 3 is switched to switch between the first working port A being connected to the first air inlet P and the second working port B being connected to the first air inlet P, thereby switching the air intake and air exhaust of the first air cavity 12 and the second air cavity 13 in turn.

[0026] Specifically, there are two reversing exhaust ports, namely the first reversing exhaust port R1 and the second reversing exhaust port R2, which correspond to the first working port A and the second working port B respectively. The corresponding first working port A and the first reversing exhaust port R1 are placed on the same side of the first air inlet P, and the second working port B and the second reversing exhaust port R2 are placed on the other side of the first air inlet P, so as to facilitate the communication between the corresponding air outlet and the reversing exhaust port. When the reversing valve 3 is switched to one of the air inlet and outlet positions, the first working port A is connected to the first air inlet P, and the second working port B is connected to the second reversing exhaust port R2. When the reversing valve 3 is switched to another air inlet and outlet position, the second working port B is connected to the first air inlet P, and the first working port A is connected to the first reversing exhaust port R1. Of course, there can also be one reversing exhaust port, which is not limited in this embodiment.

[0027] In one implementation of the reversing valve in this embodiment, Figure 3 and Figure 4 As shown, the reversing valve 3 can be a double-sided gas-controlled reversing valve, that is, both ends of the reversing valve body 31 of the reversing valve 3 (such as Figure 4The first control port Y1 and the second control port Y2 are provided at the left and right ends of the cylinder 1, and the first reversing trigger device 5 and the second reversing trigger device 6 are both gas-controlled valves, which are respectively provided at the two ends of the cylinder 1 (as shown in FIG. Figure 3 The first reversing trigger device 5 and the second reversing trigger device 6 are respectively triggered to open by the cylinder piston 11; the first air inlet P, the second air inlet E of the first reversing trigger device 5, and the third air inlet F of the second reversing trigger device 6 are respectively connected to the air source; the third exhaust port C of the first reversing trigger device 5 is connected to the first control port Y1, and the fourth exhaust port D of the second reversing trigger device 6 is connected to the second control port Y2, which is used to connect the second air inlet E and the first control port Y1 after the first reversing trigger device 5 is triggered to open, so as to push the reversing valve core 32 of the reversing valve 3 to slide to the first The working port A is connected to the first air inlet P and the second working port B is connected to the reversing exhaust port, that is, the reversing valve 3 is controlled to connect the first working port A and the first air inlet P, and the second working port B and the second reversing exhaust port R2, and after the second reversing trigger device 6 is triggered to open, the third air inlet F and the second control port Y2 are connected to push the reversing valve core 32 to slide to the position where the second working port B is connected to the first air inlet P and the first working port A is connected to the reversing exhaust port, that is, the reversing valve 3 is controlled to connect the second working port B and the first air inlet P, and the first working port A and the first reversing exhaust port R1.

[0028] Specifically, the first reversing trigger device 5 is arranged at one end of the cylinder 1 (such as Figure 3 The second reversing trigger device 6 is arranged at the other end of the cylinder 1 (as shown in the left end) Figure 3 The first reversing trigger device 5 and the second reversing trigger device 6 are partially protruded in the first air cavity 12 and the second air cavity 13 on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left and right into position, the first reversing trigger device 5 and the second reversing trigger device 6 can be triggered to open respectively. In this embodiment, the first reversing trigger device 5, that is, the air-controlled valve body is provided with a slidable air-controlled valve core, and the air-controlled valve body is provided with a third air outlet C and a second air inlet E. The sliding of the air-controlled valve core can make the air-controlled valve core slide to the corresponding position connecting the third air outlet C and the second air inlet E. A starting block is provided on one side of the air-controlled valve core, and the starting block is connected to the air-controlled valve core to slide synchronously relative to the air-controlled valve body, thereby realizing the connection and disconnection of the third air outlet C and the second air inlet E. The second air inlet E is connected to the air source, and the third air outlet C is connected to the first control port Y1. The starting block is partially protruded on the outside of the air-controlled valve body, as shown in FIG. Figure 3As shown, when the cylinder piston 11 slides to the left end under the action of air pressure, the cylinder piston 11 can touch the start block to start the first reversing trigger device 5, so that the start block and the air control valve core slide to the left until the third air outlet C is connected to the second air inlet E, thereby realizing the connection between the air source and the first control port Y1, so that the control cavity corresponding to the first control port Y1 can be pressurized, so that the reversing valve 3 slides and reverses, that is, the valve core of the reversing valve 3 is pushed to move rightward and switched to the position as shown in FIG. Figure 3 The position where the first working port A is connected to the first air inlet P is shown, that is, the control reversing valve 3 is connected to the first working port A and the first air inlet P, so that the cylinder piston 11 can slide to the right.

[0029] In this embodiment, the triggering ends of the first reversing trigger device 5 and the second reversing trigger device 6 are both provided with a position core shaft, which is slidably arranged on the cylinder body of the cylinder 1 along the movement direction of the cylinder piston 11, and is used to push the corresponding position core shaft to slide along the cylinder piston 11 when the cylinder piston 11 slides to its end point position, thereby pushing the valve core of the first reversing trigger device 5 or the second reversing trigger device 6 to move synchronously, thereby realizing the triggering and opening of the first reversing trigger device 5 or the second reversing trigger device 6.

[0030] Specifically, mounting holes are respectively provided on the two side plates on the valve body of the cylinder 1 corresponding to the two sides of the cylinder piston 11, namely, the cylinder end covers, and each mounting hole is sealed and slidably connected with a position core shaft, that is, the position core shaft is slidably traversed through the cylinder end cover of the cylinder 1 and can seal the mounting hole, and the end of the position core shaft placed outside the cylinder 1 is connected to the first reversing trigger device 5 or the second reversing trigger device 6 to drive the corresponding valve core to move; when the cylinder piston 11 slides to the left to a position close to the left end point, the left side wall of the cylinder piston 11 is pressed and contacted with the right end of the left position core shaft placed in the first air cavity 12, which can push the left position core shaft to slide to the left synchronously with the cylinder piston 11 until the cylinder piston 11 slides to the right End point position, during the sliding process of the core shaft at the left side, the valve core of the first reversing trigger device 5 is pushed to move to the left synchronously. When the cylinder piston 11 slides to the left end point position, the valve core of the first reversing trigger device 5 moves to the position of the third air outlet C and the second air inlet E, which can realize the triggering and opening of the first reversing trigger device 5, and then the reversing valve 3 is switched to the position where the first working port A is connected to the first air inlet P, so that the cylinder piston 11 can slide to the right. The sliding of the cylinder piston 11 to the right can reset the valve core of the first reversing trigger device 5 under the action of the air-controlled valve core reset spring, and push the core shaft at the left side to slide to the right synchronously, so as to realize the reset of the first reversing trigger device 5 and the core shaft at the left side.

[0031] In this embodiment, the movement of the right side position spindle and the working process of the second reversing trigger device 6 can refer to the movement of the left side position spindle and the triggering and starting working process of the first reversing trigger device 5, which will not be repeated here.

[0032] In this embodiment, the structure of the second reversing trigger device 6 is similar to that of the first reversing trigger device 5, that is, the second reversing trigger device 6 is provided with a fourth air outlet D connected to the third air inlet F, which is respectively connected to the second control port Y1 and the air source, and when the cylinder piston 11 slides to the right end under the action of air pressure, the cylinder piston 11 can trigger and start the second reversing trigger device 6, so that the fourth air outlet D is connected to the third air inlet F, and the second control port Y1 and the air source are connected, so that the control cavity corresponding to the second control port Y1 can be pressurized, so that the reversing valve 3 slides and reverses, that is, moves to the left, and switches to the position where the second working port B is connected to the first air inlet P, that is, the control reversing valve 3 is connected to the second working port B and the first air inlet P, so that the cylinder piston 11 can slide to the left. The specific structure and working principle of the second reversing trigger device 6 can refer to the first reversing trigger device 5, and the second reversing trigger device 6 will not be described in detail in this embodiment.

[0033] In this embodiment, the air intakes of the first control port Y1 and the second control port Y2 are respectively used as the moving-in-position signals for moving both ends of the cylinder piston into position.

[0034] In another implementation of the reversing valve in this embodiment, Figure 5 and Figure 6 As shown, the reversing valve 3 may be a spring-return type pneumatically controlled reversing valve, that is, one end of the reversing valve body 31 (such as Figure 6 The left end of the cylinder 1 is provided with a third control port Z, and the other end of the reversing valve body 31 is provided with a return spring 7; the first reversing trigger device 5 and the second reversing trigger device 6 are both gas-controlled valves, which are respectively arranged at both ends of the cylinder 1 (such as Figure 3The first reversing trigger device 5 and the second reversing trigger device 6 are respectively triggered and opened by the cylinder piston 11; the first air inlet P and the second air inlet E of the first reversing trigger device 5 are respectively connected to the air source; the third exhaust port C of the first reversing trigger device 5 and the third air inlet F of the second reversing trigger device 6 are respectively connected to the third control port Z, and the fourth exhaust port D of the second reversing trigger device 6 is connected to the outside, which is used to connect the second air inlet E and the third control port Z after the first reversing trigger device 5 is triggered to open, so as to push the reversing valve core to slide to the first working port A and the first inlet The air port P is connected and the second working port B is connected to the reversing exhaust port, that is, the reversing valve 3 is controlled to connect the first working port A and the first air inlet P, and the second working port B and the second reversing exhaust port R2, and after the second reversing trigger device 6 is triggered to open, the third control port Z and the fourth exhaust port D are connected, so that the reversing valve core is reset to the position where the second working port B is connected to the first air inlet P and the first working port A is connected to the reversing exhaust port under the action of the reset spring, that is, the reversing valve 3 is controlled to connect the second working port B and the first air inlet P, and the first working port A and the first reversing exhaust port R1.

[0035] Specifically, a reversing valve core 32 is provided in the reversing valve body 31 and is slidable along its length direction. The third control port Z is connected to one side of the reversing valve core 32 (such as Figure 6 The return spring 7 is arranged on the other side of the reversing valve core 32 (as shown in FIG. Figure 6 When air is introduced into the third control port Z, the spool 32 of the directional control valve can move toward the side of the return spring 7 (as shown in the figure) under the action of the air pressure on the left side. Figure 6 After the third control port Z is unloaded, the reversing valve core 32 can move toward the third control port Z side under the action of the return spring 7 (as shown in FIG. Figure 6 The first reversing trigger device 5 is arranged at one end of the cylinder 1 (as shown in FIG. Figure 5 The second reversing trigger device 6 is arranged at the other end of the cylinder 1 (as shown in the left end) Figure 5 The first reversing trigger device 5 and the second reversing trigger device 6 are partially protruded in the first air cavity 12 and the second air cavity 13 on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left and right into position, the first reversing trigger device 5 and the second reversing trigger device 6 can be triggered and opened respectively.

[0036] In this embodiment, the specific structures of the first reversing trigger device 5 and the second reversing trigger device 6 can refer to the specific structures of the first reversing trigger device 5 and the second reversing trigger device 6 in the previous embodiment, and will not be repeated in this embodiment.

[0037] In this embodiment, the air inlet and outlet of the third control port Z are respectively used as the moving-in-position signals for moving the two ends of the cylinder piston into position.

[0038] Of course, in other embodiments, the reversing valve 3 may also be an electromagnetically controlled reversing valve, that is, electromagnets are provided at both ends of the reversing valve to use the suction force of the electromagnets to push the valve core to change the working position of the valve.

[0039] In this embodiment, the structures of the spring return type air-controlled reversing valve and the double-sided air-controlled reversing valve can be referenced to each other. In this embodiment, the structure of the double-sided air-controlled reversing valve is taken as an example for detailed description.

[0040] See also Figures 7 to 10 , which shows a schematic diagram of the structure of a double-sided gas-controlled reversing valve provided by an embodiment of the present invention. As shown in the figure, the double-sided gas-controlled reversing valve is a combined reversing valve, which includes: a reversing valve body 31 and a reversing valve core 32.

[0041] The first air inlet P, the reversing exhaust port, the first working port A, and the second working port B are arranged on the reversing valve body 31. The first working port A and the second working port B are respectively connected to the first air cavity 12 and the second air cavity 13. The reversing valve core 32 can slide in the reversing valve body 31 to achieve reversal. The reversing valve core 32 slides in the reversing valve body 31 based on the signals of the first reversing trigger device 5 and the second reversing trigger device 6 to achieve reversal, thereby switching the air inlet and outlet of the first air cavity 12 and the second air cavity 13. The reversing valve core 32 includes: a main air inlet section 326 that can be connected to the first air inlet P of the reversing valve 3, a first exhaust section 324 and a second exhaust section 328 that can be connected to the reversing exhaust port of the reversing valve 3, a first working section 325 that can be connected to the first working port A of the reversing valve 3, and a second working section 327 that can be connected to the second working port B of the reversing valve 3.

[0042] Specifically, the first air inlet P, the first working port A, the second working port B, the first reversing exhaust port R1, and the second reversing exhaust port R2 are all arranged on the reversing valve body 31. The first air inlet P can be arranged at the middle position of the axial direction of the reversing valve body 31, and the corresponding first working port A and the first reversing exhaust port R1 are arranged on the same side of the first air inlet P (such as Figure 7 The second working port B and the second reversing exhaust port R2 are placed on the other side of the first air inlet P (as shown in FIG. Figure 7 The inside of the reversing valve body 31 is provided with a Figure 7 The reversing switching chamber 311 is arranged in the horizontal direction as shown in the figure, and the reversing valve core 32 is arranged along the length direction of the reversing switching chamber 311 (as shown in the figure Figure 7The first exhaust section 324, the first working section 325, the main air intake section 326, the second working section 327 and the second exhaust section 328 are provided in sequence from left to right along the axial direction of the reversing valve core 32. No matter where the reversing valve core 32 slides to, the first exhaust section 324 is always connected to the first reversing exhaust port R1, the first working section 325 is always connected to the first working port A, the main air intake section 326 is always connected to the first air intake port P, the second working section 327 is always connected to the second working port B, and the second exhaust section 328 is always connected to the second reversing exhaust port R2. Of course, when there is only one reversing exhaust port, the first exhaust section 324 and the second exhaust section 328 are always connected to the reversing exhaust port, respectively. In this embodiment, two reversing exhaust ports are used as an example for explanation. The reversing valve core 32 slides to the left as shown in FIG. Figure 7 When the left end is shown, the first exhaust section 324 is connected with the first working section 325 to realize the communication between the first working port A and the first reversing exhaust port R1, and the main air intake section 326 is connected with the second working section 327 to realize the first air intake port P and the second working port B, so that the first air cavity 12 is exhausted and the second air cavity 13 is inhaled, so that the cylinder piston 11 can move leftward (relative to Figure 3 The reversing valve core 32 slides rightward to the position shown in FIG. Fig.15 The right end shown in FIG. 1 is connected to the second working section 327 and the second exhaust section 328 to realize the communication between the second working port B and the second reversing exhaust port R2, and is connected to the first working section 325 and the main air intake section 326 to realize the communication between the first air intake port P and the first working port A, so that the second air cavity 13 can discharge air and the first air cavity 12 can inlet air, so that the cylinder piston 11 can move rightward (relative to Figure 3 for the positions shown).

[0043] The interior of the reversing valve core 32 is provided with an auxiliary exhaust chamber 321, and the auxiliary exhaust chamber 321 is provided with an auxiliary exhaust valve core 33; Fig.15 When the first working section 325 is connected to the main air intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 is connected to the second working section 327 and the second exhaust section 328; Figure 7 When the second working section 327 is connected to the main intake section 326 and the first working section 325 is connected to the first exhaust section 324 , the auxiliary exhaust valve core 33 is connected to the first working section 325 and the first exhaust section 324 .

[0044] Specifically, in Fig.15When the first working section 325 shown is connected with the main air inlet section 326 and the second working section 327 is connected with the second exhaust section 328, that is, when the reversing valve core 32 slides to the position where the first working port A is connected with the first air inlet P and the second working port B is connected with the reversing exhaust port, the auxiliary exhaust valve core 33 is connected with the second working section 327 and the second exhaust section 328, that is, the second working port B is connected with the reversing exhaust port, so as to assist the reversing exhaust port in unloading the air pressure in the second air cavity 13, thereby allowing the cylinder piston 11 to move to the side where the second air cavity 13 is located under the action of the air pressure in the first air cavity 11, so as to ensure that the cylinder piston 11 can move to the position and trigger the second reversing trigger device 6, so as to control the reversing valve core 32 to slide to the left to switch to the position as shown in FIG. Figure 7 The position shown in FIG. 1 is connected to the first air inlet P and the first air inlet A is connected to the reversing exhaust port to avoid the cylinder piston 11 and the reversing valve core 32 from being stuck; and Figure 7 When the second working section 327 shown is connected with the main air intake section 326 and the first working section 325 is connected with the first exhaust section 324, that is, when the reversing valve core 32 slides to the position where the second working port B is connected with the first air intake port P and the first working port A is connected with the reversing exhaust port, the first working section 325 and the first exhaust section 324, that is, the first working port A and the reversing exhaust port are connected, so as to assist the reversing exhaust port in unloading the air pressure in the first air cavity 12, so that the cylinder piston 11 moves toward the side where the first air cavity 12 is located under the action of the air pressure in the second air cavity 13, so as to ensure that the cylinder piston 11 can move into position and trigger the first reversing trigger device 5, so as to control the reversing valve core 32 to slide to the right to switch to the position where the first working port A is connected with the first air intake port P and the second working port B is connected with the reversing exhaust port, so as to avoid the cylinder piston 11 and the reversing valve core 32 from getting stuck.

[0045] In this embodiment, when the reversing valve core 32 is switched to the point where the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 can be quickly switched to the point where the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328. Fig.15 The second state of the second working section 327 and the second exhaust section 328 is shown; that is, from the time when the reversing valve core 32 is switched to the position where the first working section 325 is connected with the main air intake section 326 and the second working section 327 is connected with the second exhaust section 328, until the time when the reversing valve core 32 is switched to the position where the second working section 327 is connected with the main air intake section 326 and the first working section 325 is connected with the first exhaust section 324, the auxiliary exhaust valve core 33 is in the second state. In particular, when the reversing valve core 32 is in the middle position so that the second working section 327 is inlet and the first working section 325 is not exhausting, that is, as shown in FIG. Fig.17 and Fig.19 The second working section 327 shown is just connected to the main air intake section 326, and as shown in FIG. Fig.17and Fig.18 When the first working section 325 and the first exhaust section 324 are not opened, the auxiliary exhaust valve core 33 is in the second state, and the auxiliary exhaust valve core 33 connects the second working section 327 and the second exhaust section 328 to achieve the connection between the second working port B and the reversing exhaust port, that is, to achieve the connection between the second working port B and the second reversing exhaust port R2.

[0046] From the moment when the reversing valve core 32 is switched to the position where the second working section 327 is connected to the main air intake section 326 and the first working section 325 is connected to the first exhaust section 324, to the moment when the reversing valve core 32 is switched to the position where the first working section 325 is connected to the main air intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 can be quickly switched to the position where the second working section 327 is connected to the second exhaust section 328. Figure 7 In other words, when the reversing valve core 32 is in the middle position so that the first working section 325 is in air intake and the second working section 327 is not in air exhaust, the auxiliary exhaust valve core 33 is in the first state. Fig.11 and Fig.12 The first working section 325 shown is just connected to the main air intake section 326, and as shown in FIG. Fig.11 and Fig.14 When the second working section 327 and the second exhaust section 328 are not opened, the auxiliary exhaust valve core 33 is in the first working state, and the auxiliary exhaust valve core 33 connects the first working section 325 and the first exhaust section 324 to achieve the connection between the first working port A and the reversing exhaust port, that is, to achieve the connection between the first working port A and the first reversing exhaust port R1.

[0047] Furthermore, in Fig.15 When the first working section 325 is connected to the main intake section 326 and the second working section 327 is connected to the second exhaust section 328, the auxiliary exhaust valve core 33 can connect the second working section 327 and the second exhaust section 328 through the second auxiliary exhaust passage; Figure 7When the second working section 327 is connected to the main air intake section 326 and the first working section 325 is connected to the first exhaust section 324, the auxiliary exhaust valve core 33 can be connected to the first working section 325 and the first exhaust section 324 through the first auxiliary exhaust passage. In this embodiment, in order to simplify the structure of the auxiliary exhaust valve core 33, there are two reversing exhaust ports, the first exhaust section 324 is connected to the first reversing exhaust port R1, and the second exhaust section 328 is connected to the second reversing exhaust port R2. At the same time, when the second auxiliary exhaust passage is connected to the second working section 327 and the second exhaust section 328, the first auxiliary exhaust passage is in a sealed state, cutting off the passage connecting the first working port A on the auxiliary exhaust valve core 33 with the first reversing exhaust port R1. When the first auxiliary exhaust passage is connected to the first working section 325 and the first exhaust section 324, the second auxiliary exhaust passage is in a sealed state, cutting off the passage connecting the second working port B on the auxiliary exhaust valve core 33 with the second reversing exhaust port R2.

[0048] In such Fig.15 When the reversing valve core 32 shown in the figure slides to the position where the first working port A is connected to the first air inlet P and the second working port B is connected to the second reversing exhaust port R2, and before the reversing valve core 32 slides back to the position again, from the time when the reversing valve core 32 is switched to the position where the first working section 325 is connected to the main air inlet section 326 and the second working section 327 is connected to the second exhaust section 328, until the time when the reversing valve core 32 is switched to the position where the second working section 327 is connected to the main air inlet section 326 and the first working section 325 is connected to the first exhaust section 324, the second auxiliary exhaust passage is connected to the second working port B and the second reversing exhaust port R2, which can be used in the process where the cylinder piston 11 moves toward the side where the second air cavity 13 is located (such as Figure 3 As shown in the figure, the second auxiliary exhaust passage connects the second working port B with the reversing exhaust port, which can assist in exhausting the second air chamber 13. Not only can the auxiliary exhaust of the second air chamber 13 through the second auxiliary exhaust passage and the reversing exhaust port ensure that the cylinder piston 11 can also reliably move to the side where the second air chamber 13 is located when the cylinder piston 11 is stuck due to insufficient air pressure of the air source, but also when the reversing valve core 32 is not in place, resulting in the second working port B being connected to the first air inlet P and the first working port A being not connected to the reversing exhaust port, that is, Fig.17 and Fig.19 The second working section 327 shown is just connected to the main air intake section 326, and as shown in FIG. Fig.17 and Fig.18When the first working section 325 and the first exhaust section 324 shown are not opened, the intake air in the second air cavity 13 is discharged through the second auxiliary exhaust passage to avoid the cylinder piston 11 from getting stuck, that is, before the reversing valve core 32 is not switched into place, it is ensured that the cylinder piston 11 can continue to move toward the side where the second air cavity 13 is located, and then the second reversing trigger device 6 can be continuously triggered, thereby ensuring that the reversing valve core 32 can be switched into place, avoiding the reversing valve core 32 and the cylinder piston 11 from getting stuck.

[0049] In such Figure 7 When the reversing valve core 32 shown in the figure slides to the position where the second working port B is connected to the first air inlet P and the first working port A is connected to the first reversing exhaust port R1, and before the reversing valve core 32 slides back to the position again, that is, from the time when the reversing valve core 32 is switched to the position until the reversing valve core 32 is switched to the position until the second working section 327 is connected to the main air inlet section 326 and the first working section 325 is connected to the first exhaust section 324, until the time when the reversing valve core 32 is switched to the position until the first working section 325 is connected to the main air inlet section 326 and the second working section 327 is connected to the second exhaust section 328, the first working port A is connected to the first reversing exhaust port R1 through the first auxiliary exhaust passage, and the cylinder piston 11 can move toward the side where the first air chamber 12 is located (such as Figure 3 The first working port A and the first reversing exhaust port R1 are always connected through the first auxiliary exhaust passage, which can assist in exhausting the first air cavity 12, especially when the reversing valve core 32 is not in place, resulting in the first working port A and the first air inlet P just being connected and the second working port B and the second reversing exhaust port R2 not being connected, as shown in the figure Fig.11 and Fig.12 The first working section 325 shown is just connected to the main air intake section 326, and as shown in FIG. Fig.11 and Fig.14 When the second working section 327 and the second exhaust section 328 shown are not opened, the first auxiliary exhaust passage can be set so that the intake air at the first working port A is discharged from the first auxiliary exhaust passage to the first reversing exhaust port R1 to exhaust the intake air in the first air cavity 12, thereby avoiding the cylinder piston 11 from getting stuck, and before the reversing valve core 32 fails to reverse, it is ensured that the cylinder piston 11 can continue to move toward the side where the first air cavity 12 is located, thereby continuously triggering the first reversing trigger device 5, thereby ensuring that the reversing valve core 32 can reverse into place, thereby avoiding the reversing valve core 32 and the cylinder piston 11 from getting stuck.

[0050] Continue to see Figures 7 to 10The first working section 325 and the first exhaust section 324 are respectively provided with a first auxiliary air inlet G and a first auxiliary exhaust port S1 communicating with the auxiliary exhaust chamber 321; the second working section 327 and the second exhaust section 328 are provided with a second auxiliary air inlet H and a second auxiliary exhaust port S2 communicating with the auxiliary exhaust chamber 321.

[0051] Specifically, the first auxiliary air inlet G and the second auxiliary air inlet H can be connected to the first working section 325 and the second working section 327 respectively, so as to be connected to the first working port A and the second working port B respectively; the first auxiliary exhaust port S1 and the second auxiliary exhaust port S2 are respectively arranged at the two ends of the reversing valve core 32, and are respectively connected to the first exhaust section 324 and the second exhaust section 328, so as to be connected to the first reversing exhaust port R1 and the second reversing exhaust port R2; in this embodiment, the first auxiliary exhaust port S1 is connected to the first exhaust section 324, and the second auxiliary exhaust port S2 is connected to the second exhaust section 328, that is, at any position of the reversing valve core 32 within its sliding stroke, the first auxiliary exhaust port S1 is connected to the first reversing exhaust port R1, and the second auxiliary exhaust port S2 is connected to the second reversing exhaust port R2.

[0052] Continue to see Figures 8 to 10 , auxiliary exhaust chamber 321: includes a first auxiliary exhaust section 3211, an auxiliary exhaust reversing section 3212 and a second auxiliary exhaust section 3213 which are arranged in sequence; wherein, the auxiliary exhaust valve core 33 is slidably arranged in the auxiliary exhaust reversing section 3212, and the first auxiliary air inlet G and the second auxiliary air inlet H are opened on the cavity wall of the auxiliary exhaust reversing section 3212, and when the first working section 325 is connected with the main air inlet section 326 and the second working section 327 is connected with the second exhaust section 328, the auxiliary exhaust valve core 33 slides to the second state in which the second auxiliary air inlet H is connected with the second auxiliary exhaust port S2; when the second working section 327 is connected with the main air inlet section 326 and the first working section 325 is connected with the first exhaust section 324, the auxiliary exhaust valve core 33 slides to the first state in which the first auxiliary air inlet G is connected with the first auxiliary exhaust port S2.

[0053] Specifically, the first auxiliary exhaust port S1 and the second auxiliary exhaust port S2 are respectively connected to the first auxiliary exhaust section 3211 and the second auxiliary exhaust section 3213; the auxiliary exhaust valve core 33 is slidably connected to the inner wall of the auxiliary exhaust reversing section 3212, and the first auxiliary air inlet G and the second auxiliary air inlet H are respectively connected to the first side (such as Figure 8 left side as shown), the second side (as shown Figure 8When the first working port A is connected to the first air inlet P and the second working port B is connected to the reversing exhaust port, the first side of the auxiliary exhaust reversing section 3212 is inlet and the second side of the auxiliary exhaust reversing section 3212 is outlet, so as to push the auxiliary exhaust valve core 33 to slide to the second state, that is, slide leftward to the state shown in FIG. Fig.15 and Fig.16 In the second state shown in FIG. 1 , when the second working port B is connected to the first air inlet P and the first working port A is connected to the reversing exhaust port, the first side of the auxiliary exhaust reversing section 3212 exhausts air and the second side of the auxiliary exhaust reversing section 3212 intakes air, so as to push the auxiliary exhaust valve 32 core to slide to the first state, that is, slide to the left to the state shown in FIG. Figure 8 The first state is shown.

[0054] Specifically, the radial size of the auxiliary exhaust reversing segment 3212 is adapted to the auxiliary exhaust valve core 33 so as to be slidably connected to the auxiliary exhaust valve core 33. At the same time, an airtight seal can be formed between the two to cut off the first auxiliary exhaust segment 3211 and the second auxiliary exhaust segment 3213 on the left and right sides, thereby avoiding the connection between the first auxiliary exhaust segment 3211 and the second auxiliary exhaust segment 3213 on the left and right sides.

[0055] In such Fig.15 When the first working port A is connected to the first air inlet P and the second working port B is connected to the second reversing exhaust port R2, the gas entering the first air inlet P can be discharged from the first working port A into the first air cavity 12, and at the same time, it can be discharged from the first auxiliary air inlet G into the first end of the auxiliary exhaust reversing section 3212 (such as Fig.16 The auxiliary exhaust valve core 33 is pushed to slide to the right to slide to the left end as shown in FIG. Fig.16 In the second state shown, the second auxiliary exhaust channel is in an open state, and the second auxiliary air inlet H and the second auxiliary exhaust section 3213 are connected through the second auxiliary exhaust channel to connect the second auxiliary air inlet H and the second auxiliary exhaust port S2, that is, the second working section 327 and the second exhaust section 328 are connected, and then the second working port B and the second reversing exhaust port R2 are assisted to be connected through the second auxiliary exhaust channel, that is, the reversing of the reversing valve core 32 in the reversing switching chamber 311 makes the second working port B and the second reversing exhaust port R2 connected, while the second auxiliary exhaust channel assisted to connect the second working port B and the second reversing exhaust port R2, which can assist in exhausting the second working port B, so as to assist in exhausting the second air cavity 13; at the same time, the first auxiliary exhaust passage is in a sealed state, cutting off the first auxiliary air inlet G and the second auxiliary exhaust port S2, so as to cut off the internal connection of the valve core of the first working section 325 and the first exhaust section 324, and then cut off the internal connection of the valve core of the first working port A and the first reversing exhaust port R1, which can prevent the intake of the first working port A from being discharged from the first auxiliary exhaust passage.

[0056] In such Figure 7 When the second working port B is connected to the first air inlet P and the first working port A is connected to the first reversing exhaust port R1, the gas entering the first air inlet P can be discharged from the second working port B into the second air cavity 13, and at the same time, it can be discharged from the second auxiliary air inlet H into the second end of the auxiliary exhaust reversing section 3212 (such as Figure 8 The auxiliary exhaust valve core 33 is pushed to slide to the left to slide to the right end as shown in FIG. Figure 8 In the first state shown in FIG. 1 , the first auxiliary exhaust channel is in an open state, and the first auxiliary air inlet G and the first auxiliary exhaust section 3211 are connected through the first auxiliary exhaust channel to connect the first auxiliary air inlet G and the first auxiliary exhaust port S1, that is, the first working section 325 and the first exhaust section 324 are connected, and then the first working port A and the first reversing exhaust port R1 are assisted to be connected through the first auxiliary exhaust channel, that is, the reversing of the reversing valve core 32 in the reversing switching chamber 311 makes the first working port A connected to the first reversing exhaust port R1, and the first auxiliary air inlet G and the first auxiliary exhaust port S1 are connected, that is, the first working section 325 and the first exhaust section 324 are connected, and then the first auxiliary air inlet G and the first auxiliary exhaust port S1 are connected, that is, the first auxiliary air inlet G and the first auxiliary exhaust port S1 are connected, that is, the first The second auxiliary exhaust passage assists in connecting the first working port A with the first reversing exhaust port R1, and can assist in exhausting the first working port A to assist in exhausting the first air cavity 12; at the same time, the second auxiliary exhaust passage is in a sealed state, cutting off the second auxiliary air inlet H and the second auxiliary exhaust section 3213, so as to cut off the internal connection between the valve core of the second working section 327 and the second exhaust section 328, and further cut off the internal connection between the valve core of the second working port B and the second reversing exhaust port R2, so as to prevent the air intake of the second working port B from being discharged from the second auxiliary exhaust passage.

[0057] In this embodiment, if Fig. 9 As shown, the reversing valve core 32 is provided with a first limiting portion 322 for limiting and supporting the auxiliary exhaust valve core 33 so that the auxiliary exhaust valve core 33 is in the first state; Fig.10 As shown, a second limiting portion 323 is provided on the reversing valve core 32 for limiting and supporting the auxiliary exhaust valve core 33 so that the auxiliary exhaust valve core 33 is in the second state.

[0058] Continue to see Figures 8 to 10 The auxiliary exhaust valve core 33 includes: a valve core body 331, and two valve core bodies 331 and 332, respectively disposed on both sides of the valve core body 331 (such as Figure 8 The first switching rod 332 and the second switching rod 333 are provided on the left and right sides (as shown); wherein the valve core body 331 can slide along the inner wall of the auxiliary exhaust reversing section 3212 and form an airtight seal with the inner wall of the auxiliary exhaust reversing section 3212; the first switching rod 332 is driven by the valve core body 331 to realize the on-off switching between the first auxiliary air inlet G and the first auxiliary exhaust port S1; the second switching rod is driven by the valve core body to realize the on-off switching between the second auxiliary air inlet H and the second auxiliary exhaust port S2.

[0059] Specifically, a first switching chamber 3214 adapted to the first switching rod 332 is further provided between the auxiliary exhaust reversing section 3212 and the first auxiliary exhaust section 3211, and the first auxiliary air inlet G is provided on the chamber wall of the first switching chamber 3214, and the first switching rod 332 is slidably provided in the first switching chamber 3214, and a first gap 3215 is provided between the outer wall of the first switching rod 332 and the inner wall of the first switching chamber 3214, so as to connect the first auxiliary exhaust section 3211 and the first auxiliary air inlet G to form the first auxiliary exhaust. Passage; A second switching chamber 3216 adapted to the second switching rod 333 is also provided between the auxiliary exhaust reversing section 3212 and the second auxiliary exhaust section 3213, and a second auxiliary air inlet H is provided on the chamber wall of the second switching chamber 3216, and the second switching rod 333 is slidably provided in the second switching chamber 3216, and a second gap 3217 is provided between the outer wall of the second switching rod 333 and the inner wall of the second switching chamber 3316, which is used to connect the second auxiliary exhaust section 3213 and the second auxiliary air inlet H to form a second auxiliary exhaust passage. Among them, the first auxiliary air inlet G is provided at the end of the first switching chamber 3214 close to the auxiliary exhaust reversing section 3212, and the first auxiliary air inlet G is connected to the right end of the first switching chamber 3214 (relative to the right end of the first switching chamber 3214). Figure 8 The second auxiliary air inlet H is opened at the end of the second switching chamber 3216 close to the auxiliary exhaust reversing section 3212, and the second auxiliary air inlet H is connected to the left end of the second switching chamber 3216 (relative to the left end of the second switching chamber 3216). Figure 8 as shown).

[0060] Furthermore, the axial dimension of the valve core body 331 (eg Figure 8 The length in the horizontal direction shown in FIG. 32 is smaller than the axial dimension of the auxiliary exhaust reversing section 3212 (such as Figure 8The length in the horizontal direction shown in the figure) enables the valve core body 331 to slide left and right in the auxiliary exhaust reversing section 3212. The radial dimension of the valve core body 331 is greater than the radial dimension of the first switching rod 332 and the second switching rod 333. The two end surfaces of the valve core body 331 form an action surface. The compressed gas coming from the first auxiliary air inlet G or the second auxiliary air inlet H acts on the action surface to push the auxiliary exhaust valve core 33 to slide. The first switching chamber 3214 and the second switching chamber 3216 are respectively adapted to the first switching rod 332 and the second switching rod 333. The connection between the first switching rod 332 and the auxiliary exhaust reversing section 3212 forms a step structure, which can be used as a first limiting portion 322 to limit the limit position of the valve core body 331 sliding to the left. The connection between the second switching rod 333 and the auxiliary exhaust reversing section 3212 forms a step structure, which can be used as a second limiting portion 323 to limit the limit position of the valve core body 331 sliding to the right. The first switching rod 332 and the inner wall of the first switching chamber 3214 may be gap-matched, forming a first gap 3215 therebetween, which may connect the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212 to form a first auxiliary exhaust passage. The second switching rod 333 and the inner wall of the second switching chamber 3216 may be gap-matched, forming a second gap 3217 therebetween, which may connect the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212 to form a second auxiliary exhaust passage.

[0061] Continue to see Figures 8 to 10 The first switch rod 332 is sleeved with a first sealing ring 34, which can slide with the first switch rod 332 to realize the on-off switching between the first auxiliary air inlet G and the first auxiliary exhaust port S1. The second switch rod 333 is sleeved with a second sealing ring 35, which can slide with the second switch rod 333 to realize the on-off switching between the second auxiliary air inlet H and the second auxiliary exhaust port S2.

[0062] Specifically, when the auxiliary exhaust valve core 33 is in the second state, the first sealing ring 34 seals the first gap 3215 and cuts off the first auxiliary exhaust passage; when the auxiliary exhaust valve core 33 is in the first state, the second sealing ring 35 seals the second gap 3217 and cuts off the second auxiliary exhaust passage; the first sealing ring 34 is sleeved on the left end of the first switching rod 332, and the second sealing ring 35 is sleeved on the right end of the second switching rod 333. When the auxiliary exhaust valve core 33 is in the second state, the first sealing ring 34 slides into the first gap 3215, and can seal the first gap 3215 and cut off the first auxiliary exhaust passage, so as to cut off the connection between the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212, that is, to cut off the connection between the first auxiliary air inlet G and the first auxiliary exhaust port S1, and the second sealing ring 35 then slides into the second auxiliary exhaust section 3213 to ensure that the second gap 3217 connects the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212 to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core 33 is in the first state, the first sealing ring 34 then slides into the first auxiliary exhaust section 3211 to ensure that the first gap 3215 connects the first auxiliary exhaust section 3211 and the first end of the auxiliary exhaust reversing section 3212 to form a first auxiliary exhaust passage, and the second sealing ring 35 is located in the second gap 3217, which can seal the second gap 3217 to cut off the second auxiliary exhaust passage, so as to cut off the connection between the second auxiliary exhaust section 3213 and the second end of the auxiliary exhaust reversing section 3212, that is, to cut off the connection between the second auxiliary air inlet H and the second auxiliary exhaust port S2.

[0063] Continue to see Figures 8 to 9 A third sealing ring 36 is provided on the valve core body 331 for sealing the gap between the outer wall of the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212 so as to form an airtight seal between the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212 . Specifically, the third sealing ring 36 can be one or more. In this embodiment, two third sealing rings 36 are taken as an example for explanation. The two third sealing rings 36 are respectively sleeved on the two ends of the valve core body 331, so that an airtight seal is formed between the valve core body 331 and the inner wall of the auxiliary exhaust reversing section 3212, and the connection between the first auxiliary exhaust section 3211 and the second auxiliary exhaust section 3213 can be cut off, and the connection between the left and right ends of the auxiliary exhaust reversing section 3212 can be cut off, that is, the connection between the first auxiliary air inlet G and the second auxiliary air inlet H is cut off. At the same time, it can ensure that the auxiliary exhaust valve core 33 can slide synchronously with the reversing valve core 32 relative to the reversing valve body 31, that is, when the reversing valve core 32 slides relative to the reversing valve body 31, the auxiliary exhaust valve core 33 moves synchronously with the reversing valve core 32, and the auxiliary exhaust valve core 33 can also slide relative to the reversing valve core 32.

[0064] Continue to see Figure 3 , Figure 4 , Figures 7 to 19 The working process of the energy-saving hydraulic station with a double-sided air-controlled combined reversing valve is described in detail below.

[0065] like Figure 7 As shown, when the first control port Y1 is exhausted and the second control port Y2 is inlet, the reversing valve core 32 is placed at the left end, the second working section 327 is connected to the main inlet section 326 and the first working section 325 is connected to the first exhaust section 324, that is, the second working port B is connected to the first inlet port P and the first working port A is connected to the first reversing exhaust port R1, the gas entering at the first inlet port P can be discharged from the second working port B into the second air cavity 13, and at the same time, it can also be discharged from the second auxiliary inlet port H into the second end of the auxiliary exhaust reversing section 3212 (as shown in FIG. Figure 8 The auxiliary exhaust valve core 33 is pushed to slide to the left to slide to the right end as shown in FIG. Figure 8 The left limit shown is in the first state, and the first auxiliary air inlet G and the first auxiliary exhaust section 3211 are connected through the first auxiliary exhaust channel to realize the connection between the first working port A and the first auxiliary exhaust port S1, that is, the exhaust at the left end of the auxiliary exhaust valve core 33 is opened, and the exhaust at the right end is closed. At the same time, the second working port B supplies air to the second air cavity 13, and the cylinder piston 11 can slide to the left. When the cylinder piston 11 slides to the left end under the action of air pressure, that is, moves into place, the cylinder piston 11 triggers the first reversing trigger device 5 to connect the third air outlet C and the second air inlet E, thereby realizing the connection between the air source and the first control port Y1, and the first control port Y1 is inhaled.

[0066] like Fig.11 As shown, when the first control port Y1 is inlet, the reversing valve core 32 is pushed to move rightward; when the reversing valve core 32 moves to Fig.13 The first working port A shown is closed to the first reversing exhaust port R1. Fig.12 As shown, when the first working port A and the first air inlet P are just connected, Fig.14 As shown, the second working port B and the second reversing exhaust port R2 are not opened yet, that is, the reversing valve core 32 is in the middle position so that the first working section 325 is inlet and the second working section 327 is not exhausting. Therefore, the second air cavity 13 is pressure-maintained. At this time, the positional relationship between the auxiliary exhaust valve core 33 and the reversing valve core 32 is unchanged. Figure 8In the positional relationship shown, the intake air of the first working port A is discharged to the first reversing exhaust port R1 through the first auxiliary exhaust port S1 to exhaust the intake air of the first working port A, and the intake air in the first air cavity 11 can be discharged from the first auxiliary exhaust port S1 and the first reversing exhaust port R1, which can avoid the air pressure at the first working port A to prevent the reversing valve core 32 from continuing to slide, avoid the reversing valve 3 from being stuck, and avoid the cylinder 1 from being stuck. Since the intake air of the first working port A can be discharged through the first auxiliary exhaust passage, the cylinder piston 11 can continue to move to the left under the action of the air pressure maintained in the second air cavity 13, so as to ensure that the first control port Y1 continues to intake air, so that the reversing valve core 32 continues to move to the right.

[0067] Until the reversing valve core 32 moves to Fig.15 When the first working port A shown in the figure is fully connected with the first air inlet P, and the second working port B is connected with the second reversing exhaust port R2, that is, when the first working section 325 is connected with the main air inlet section 326 and the second working section 327 is connected with the second exhaust section 328, since at this time the first working port A connected with the first auxiliary air inlet G has air pressure, and the second working port B connected with the second auxiliary air inlet H has no air pressure, therefore, the left end of the auxiliary exhaust reversing section 3212 has air pressure, and the right end has no air pressure, therefore, the auxiliary exhaust valve core 33 is pushed to move rightward to the position shown in FIG. Fig.16 The right limit position shown is in the second state, connecting the second auxiliary air inlet H and the second auxiliary exhaust port S2, and cutting off the connection between the first auxiliary air inlet G and the second auxiliary exhaust port S2, that is, the exhaust at the right end of the auxiliary exhaust valve core 33 is open, and the exhaust at the left end is closed. At this time, the first working port A supplies air to the first air cavity 12, the cylinder piston 11 can slide to the right, and the right end of the auxiliary exhaust valve core 33 is connected to the exhaust.

[0068] When the cylinder piston 11 slides to the right end under the action of air pressure, the cylinder piston 11 triggers the second reversing trigger device 6, and the second control port Y2 takes in air, pushing the reversing valve core 32 to move leftward. Fig.17 As shown, when the reversing valve core 32 moves to the second working port B and the second reversing exhaust port R2 are closed, as shown in FIG. Fig.19 When the second working port B is just connected to the first air inlet P, Fig.18The first working port A shown is connected to the first reversing exhaust port R1, that is, the exhaust of the first working port A has not been opened yet, and pressure is maintained. The intake of the second working port B is discharged through the second auxiliary exhaust passage to avoid entering the second air chamber 13 and causing the cylinder piston 11 to move in the opposite direction. Since the intake of the second working port B can be discharged through the second auxiliary exhaust passage, the cylinder piston 11 can continue to move to the left under the action of the air pressure maintained in the first air chamber 11 to move to the position, or maintain the trigger position, to ensure that the second control port Y2 continues to intake air, so that the reversing valve core 32 continues to move to the left until the second working port B is fully connected to the first air intake port P. When the first working port A is connected to the first reversing exhaust port R1, since the second working port B connected to the second auxiliary air intake port H has air pressure at this time, and the first working port A connected to the first auxiliary air intake port G has no air pressure, therefore, the right end of the auxiliary exhaust reversing section 3212 has air pressure, and the left end has no air pressure, so the auxiliary exhaust valve core 33 is pushed to move to the left as shown in FIG. Figure 8 The left end limit position shown is in the first state, and the left end of the auxiliary exhaust valve core 33 is open for exhaust. At this time, the second working port B supplies air to the second air cavity 13, and the left end of the auxiliary exhaust valve core 33 is connected to the exhaust.

[0069] In this embodiment, the internal structure of the electromagnetically controlled reversing valve, that is, the structure between the reversing valve core and the reversing valve body, as well as the structure and relative position of the auxiliary exhaust valve core inside the reversing valve core, especially the structure and relative position of the auxiliary exhaust valve core inside the reversing valve core, can all refer to the specific structure of the double-sided air-controlled reversing valve, and will not be described in detail in this embodiment.

[0070] In summary, the reversing valve core, the reversing valve and the energy-saving hydraulic station provided in the present embodiment can switch the reversing valve core 32 in different states by setting the auxiliary exhaust valve core 33 in the reversing valve core 32. When the first working section 325 is connected with the main air intake section 326 and the second working section 327 is connected with the second exhaust section 328, the auxiliary exhaust valve core 33 connects the second working section 327 and the second exhaust section 328 to perform auxiliary exhaust on the second working section 327, that is, to perform auxiliary exhaust on the second air chamber 13, so that the cylinder piston 11 is moved to the second air chamber 13 under the action of the air pressure in the first air chamber 12. 3 to trigger the second reversing trigger device 6, thereby making the reversing valve 3 reversing in place, controlling the reversing valve 3 to reversing until the second working section 327 is connected to the main air intake section 326 and the first working section 325 is connected to the first exhaust section 324. In particular, when the air source pressure drops or fluctuates greatly, the reversing valve 3 can be switched to the state where the second working section 327 is connected to the main air intake section 326 and the first working section 325 is connected to the first exhaust section 324, that is, the state where the second air chamber 13 is inlet and the first air chamber 12 is exhausted, thereby avoiding the cylinder from being stuck, that is, avoiding the cylinder piston from stopping moving. The movement causes the hydraulic pressure to stop being output, resulting in the loss of pressure on the tooling, which leads to the occurrence of phenomena such as the workpiece being loosely clamped and the tool being hit; when the second working section 327 is connected to the main air intake section 326 and the first working section 325 is connected to the first exhaust section 324, the auxiliary exhaust valve core 33 is connected to the first working section 325 and the first exhaust section 324, and the first working section 325 is auxiliary exhausted, that is, the first air cavity 12 is auxiliary exhausted, so that the cylinder piston 11 moves to the side where the first air cavity 12 is located under the action of the air pressure in the second air cavity 13, so as to trigger the second reversing trigger device 6, so that the reversing valve 3 is reversed in place, and the control The reversing valve 3 switches until it connects the second working section 327 with the main air intake section 326 and connects the first working section 325 with the first exhaust section 324. In particular, when the air source pressure drops or fluctuates greatly, the reversing valve 3 can switch to the state where the second working section 327 and the main air intake section 326 are connected and the first working section 325 and the first exhaust section 324 are connected, that is, the first air cavity 12 is inhaled and the second air cavity 13 is exhausted, thereby avoiding the cylinder from getting stuck, that is, avoiding the cylinder piston from stopping moving and no longer outputting hydraulic pressure, resulting in loss of pressure on the tooling, resulting in the workpiece being loosely clamped, collision with the tool, and the like.

[0071] 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.

[0072] 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.

[0073] 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 reversing valve core, comprising a main air intake section that can be communicated with a first air intake port on a reversing valve body, a first exhaust section and a second exhaust section that can be communicated with a reversing exhaust port on the reversing valve body, a first working section that can be communicated with a first working port on the reversing valve body, and a second working section that can be communicated with a second working port on the reversing valve body; characterized in that: An auxiliary exhaust cavity is provided inside the reversing valve core, and an auxiliary exhaust valve core is provided inside the auxiliary exhaust cavity; When the first working section is connected to the main air intake section and the second working section is connected to the second exhaust section, the auxiliary exhaust valve core is connected to the second working section and the second exhaust section; when the second working section is connected to the main air intake section and the first working section is connected to the first exhaust section, the auxiliary exhaust valve core is connected to the first working section and the first exhaust section.

2. A reversing valve core according to claim 1, characterized in that: The first working section and the first exhaust section are respectively provided with a first auxiliary air inlet and a first auxiliary exhaust port which are in communication with the auxiliary exhaust chamber; The second working section and the second exhaust section are respectively provided with a second auxiliary air inlet and a second auxiliary exhaust port which are in communication with the auxiliary exhaust chamber.

3. A reversing valve core according to claim 2, characterized in that: The auxiliary exhaust chamber comprises: a first auxiliary exhaust section, an auxiliary exhaust reversing section and a second auxiliary exhaust section arranged in sequence; wherein The auxiliary exhaust valve core is slidably disposed in the auxiliary exhaust reversing section; The first auxiliary exhaust port is in communication with the first auxiliary exhaust section, and the second auxiliary exhaust port is in communication with the second auxiliary exhaust section; The first auxiliary air inlet and the second auxiliary air inlet are opened on the cavity wall of the auxiliary exhaust reversing section. When the first working section is connected with the main air inlet section and the second working section is connected with the second exhaust section, the auxiliary exhaust valve core slides to the second state in which the second auxiliary air inlet is connected with the second auxiliary exhaust port; when the second working section is connected with the main air inlet section and the first working section is connected with the first exhaust section, the auxiliary exhaust valve core slides to the first state in which the first auxiliary air inlet is connected with the first auxiliary exhaust port.

4. A reversing valve core according to claim 3, characterized in that: The auxiliary exhaust valve core comprises: a valve core body, a first switching rod and a second switching rod respectively disposed on both sides of the valve core body; wherein The valve core body can slide along the inner wall of the auxiliary exhaust reversing section and form an airtight seal with the inner wall of the auxiliary exhaust reversing section; The first switching rod is driven by the valve core body to realize the on-off switching between the first auxiliary air inlet and the first auxiliary air outlet; The second switching rod is driven by the valve core body to realize on-off switching between the second auxiliary air inlet and the second auxiliary air outlet.

5. A reversing valve core according to claim 4, characterized in that: A first switching cavity adapted to the first switching rod is further provided between the auxiliary exhaust reversing section and the first auxiliary exhaust section, and the first auxiliary air inlet is provided on the cavity wall of the first switching cavity; A second switching cavity matched with the second switching rod is further provided between the auxiliary exhaust reversing section and the second auxiliary exhaust section, and the second auxiliary air inlet is provided on the cavity wall of the second switching cavity.

6. A reversing valve core according to claim 4, characterized in that: The radial dimension of the valve core body is larger than the radial dimension of the first switching rod and the second switching rod, and its two end surfaces form an action surface. The compressed gas coming in from the first auxiliary air inlet or the second auxiliary air inlet acts on the action surface to push the auxiliary exhaust valve core to slide.

7. A reversing valve core according to claim 6, characterized in that: A first sealing ring is sleeved on the first switching rod, and the first sealing ring can slide along with the first switching rod to realize on-off switching between the first auxiliary air inlet and the first auxiliary exhaust port; The second switching rod is sleeved with a second sealing ring, and the second sealing ring can slide along with the second switching rod to realize on-off switching between the second auxiliary air inlet and the second auxiliary exhaust port.

8. A reversing valve core according to any one of claims 1 to 7, characterized in that: When the reversing valve core is in a neutral state so that the first working section is inlet and the second working section is not exhausting, the auxiliary exhaust valve core connects the first working section and the first exhaust section to achieve communication between the first working port and the reversing exhaust port; When the reversing valve core is in a neutral state so that the second working section is inlet and the first working section is not exhausting, the auxiliary exhaust valve core connects the second working section and the second exhaust section to achieve communication between the second working port and the reversing exhaust port.

9. A reversing valve, comprising the reversing valve core according to any one of claims 1 to 8.

10. A hydraulic station comprising the reversing valve according to claim 9.

Images