Auxiliary exhaust valve and pneumatic hydraulic station with same

Abstract

The invention provides an auxiliary exhaust valve and a pneumatic hydraulic station with the auxiliary exhaust valve. The auxiliary exhaust valve comprises an auxiliary exhaust valve shell and an auxiliary exhaust valve element. The auxiliary exhaust valve shell is provided with an auxiliary exhaust valve cavity, a third working opening, a fourth working opening and an auxiliary exhaust opening. The auxiliary exhaust valve element is arranged in the auxiliary exhaust valve cavity in a sliding mode so as to slide to a first state or a second state, in the first state, the third working opening and the auxiliary exhaust opening can be communicated, and communication between the fourth working opening and the auxiliary exhaust opening can be cut off; and in the second state, the fourth working port is communicated with the auxiliary exhaust port, and communication between the third working port and the auxiliary exhaust port is cut off. The third working port or the fourth working port is switched to be communicated with the auxiliary exhaust port through the auxiliary exhaust valve, so that auxiliary exhaust is conducted on the two air cavities of the air cylinder, and blocking and stopping of the piston of the air cylinder are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic stations, and in particular to an auxiliary exhaust valve and a pneumatic hydraulic station having the auxiliary exhaust valve. Background Art

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

[0003] 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 includes: 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 3' and a second reversing trigger device 4', and at the same time, the air cylinder 1' is connected to a pneumatic reversing valve 5', and the air source is respectively connected to the first reversing trigger device 3', the second reversing trigger device 4' and the air inlet of the air-controlled reversing valve 5'; the A' working port of the air-controlled reversing valve 5' is connected to one side of the air cylinder 1', and the B' working port of the air-controlled reversing valve 5' is connected to the cylinder 1 '; the first reversing trigger device 3' is connected to the air-controlled reversing valve 5' to control the air-controlled reversing valve 5' to start the A' working port of the air-controlled reversing valve 5', so that the A' working port of the air-controlled reversing valve 5' is connected to the P' air inlet port of the air-controlled reversing valve 5'; the second reversing trigger device 4' is connected to the air-controlled reversing valve 5' to control the air-controlled reversing valve 5' to start the B' working port of the air-controlled reversing valve 5', so that the B' working port of the air-controlled reversing valve 5' is connected to the P' air inlet port of the air-controlled reversing valve 5'.

[0004] The working process of the above-mentioned pneumatic hydraulic station is as follows: the pneumatic piston is located on the left side of the cylinder 1', triggering the first reversing trigger device 3' to open, pushing the pneumatic reversing valve 5' to change direction, and the compressed air enters the cylinder 1' from the A' working port, 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 3' 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 4' to open, pushing the pneumatic reversing valve 5' to change direction, and compressing Air enters the cylinder 1' from the B' working port 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 4' 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] 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 air-controlled reversing valve 5' has the characteristic of first in and last out, that is, the connecting port corresponding to the air inlet is connected first, while the connecting port corresponding to the exhaust port is connected later.

[0006] like Figure 2 As shown, when the air-controlled reversing valve core is pushed to move to the right, that is, the A' working port switches from air intake to exhaust, and the B' working port switches from exhaust to air intake, when the air intake of the A' working port is closed and the exhaust is not yet opened, the B' working port exhaust is closed, and the air intake is just opened, that is, the B' working port has just been inhaled, and the air intake and exhaust of the A' working port are both closed. Since the pressure of the air cavity connected to the A' working port is relatively large, the air cavity connected to the B' working port is inhaled from the B' working port, resulting in pressure in the cylinders at both ends, and the pilot valve corresponding to the air cavity connected to the B' working port is reset and closed, or the air source pressure decreases, etc., which makes the air pressure that pushes the air-controlled reversing valve core to move to the right decrease, resulting in the air-controlled reversing valve being stuck. The reversing valve is stuck, 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. Summary of the invention

[0007] In view of this, the present invention proposes an auxiliary exhaust valve and a pneumatic hydraulic station having the auxiliary exhaust valve, aiming to solve the problem of cylinder jamming in the existing hydraulic station.

[0008] On the one hand, the present invention proposes an auxiliary exhaust valve, which includes an auxiliary exhaust valve shell and an auxiliary exhaust valve core; wherein the auxiliary exhaust valve shell is provided with an auxiliary exhaust valve cavity, a third working port, a fourth working port and an auxiliary exhaust port; the auxiliary exhaust valve core is slidably arranged in the auxiliary exhaust valve cavity to slide to a first state or a second state; the third working port and the fourth working port are respectively connected to the two ends of the auxiliary exhaust valve cavity, and are used to apply a force to the auxiliary exhaust valve core so that the auxiliary exhaust valve core slides to the first state or the second state: in the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off; in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off.

[0009] Furthermore, the above-mentioned auxiliary exhaust valve has a connecting passage provided on the auxiliary exhaust valve core or on the auxiliary exhaust valve shell; when the auxiliary exhaust valve core is in the second state, the connecting passage is at least partially located between the fourth working port and the auxiliary exhaust port, connecting the fourth working port with the auxiliary exhaust port to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core is in the first state, the connecting passage is at least partially located between the third working port and the auxiliary exhaust port, connecting the third working port with the auxiliary exhaust port to form a first auxiliary exhaust passage.

[0010] Furthermore, in the above-mentioned auxiliary exhaust valve, a first sealing ring and a second sealing ring are sleeved on the auxiliary exhaust valve core, and when the auxiliary exhaust valve core is in a first state, the second sealing ring is located between the fourth working port and the auxiliary exhaust port, cutting off the second auxiliary exhaust passage; when the auxiliary exhaust valve core is in a second state, the first sealing ring is located between the third working port and the auxiliary exhaust port, cutting off the first auxiliary exhaust passage.

[0011] Furthermore, in the above-mentioned auxiliary exhaust valve, a circumferential gap is provided between the auxiliary exhaust valve core and the auxiliary exhaust valve shell, and the second sealing ring is used to be located in the circumferential gap between the auxiliary exhaust valve core and the auxiliary exhaust valve shell when the auxiliary exhaust valve core is in a first state, so as to form an in-hole seal, and the first sealing ring is used to be located in the circumferential gap between the auxiliary exhaust valve core and the auxiliary exhaust valve shell when the auxiliary exhaust valve core is in a second state, so as to form an in-hole seal.

[0012] Furthermore, in the above-mentioned auxiliary exhaust valve, the two ends of the auxiliary exhaust valve core are respectively provided with a first end face sealing structure and a second end face sealing structure, the first sealing ring is arranged between the auxiliary exhaust valve core and the first end face sealing structure, and the second sealing ring is arranged between the auxiliary exhaust valve core and the second end face sealing structure.

[0013] Further, the above-mentioned auxiliary exhaust valve, the auxiliary exhaust valve shell is provided with a first step structure and a second step structure inside the auxiliary exhaust valve cavity, the first step structure and the second step structure respectively correspond to the first end face sealing structure and the second end face sealing structure, the second sealing ring is used for when the auxiliary exhaust valve core is in the first state, and is located between the second step structure and the second end face sealing structure to form an end face sealing to seal the gap between the second step structure and the second end face sealing structure; the first sealing ring is used for when the auxiliary exhaust valve core is in the second state, and is located between the first step structure and the first end face sealing structure to form an end face sealing to seal the gap between the first step structure and the first end face sealing structure.

[0014] Furthermore, in the above-mentioned auxiliary exhaust valve, the two ends of the auxiliary exhaust valve core are respectively provided with a first bevel sealing structure and a second bevel sealing structure, the first sealing ring is arranged between the auxiliary exhaust valve core and the first bevel sealing structure, and the second sealing ring is arranged between the auxiliary exhaust valve core and the second bevel sealing structure.

[0015] Furthermore, in the above-mentioned auxiliary exhaust valve, a first inclined surface supporting structure and a second inclined surface supporting structure are provided on the auxiliary exhaust valve shell inside the auxiliary exhaust valve cavity, and the first inclined surface supporting structure and the second inclined surface supporting structure correspond to the first inclined surface sealing structure and the second inclined surface sealing structure respectively; the second sealing ring is used for pressing and contacting the second inclined surface sealing structure when the auxiliary exhaust valve core is in the first state, so as to form an inclined surface sealing to seal the gap between the second inclined surface sealing structure and the second inclined surface supporting structure; the first sealing ring is used for pressing and contacting the first inclined surface sealing structure when the auxiliary exhaust valve core is in the second state, so as to form an inclined surface sealing to seal the gap between the first inclined surface sealing structure and the first inclined surface supporting structure.

[0016] Furthermore, in the auxiliary exhaust valve, the auxiliary exhaust valve housing is provided with a sliding fit protrusion at the middle position of the auxiliary exhaust valve cavity, the auxiliary exhaust valve core is slidably connected to the sliding fit protrusion; and the auxiliary exhaust port is opened on the sliding fit protrusion.

[0017] Furthermore, in the auxiliary exhaust valve, a first limiting portion and a second limiting portion are provided on the auxiliary exhaust valve housing for limiting and supporting the auxiliary exhaust valve core respectively, so that the auxiliary exhaust valve core is in a first state and a second state respectively.

[0018] Further, the above-mentioned auxiliary exhaust valve is arranged in parallel with the reversing valve, the third working port of the auxiliary exhaust valve and the first working port of the reversing valve are respectively connected to the first air cavity, and the fourth working port of the auxiliary exhaust valve and the second working port of the reversing valve are respectively connected to the second air cavity.

[0019] On the other hand, the present invention also proposes a pneumatic hydraulic station, which includes a cylinder and the above-mentioned auxiliary exhaust valve, the third working port of the auxiliary exhaust valve is connected to the first air cavity of the cylinder, and the fourth working port of the auxiliary exhaust valve is connected to the second air cavity of the cylinder.

[0020] The auxiliary exhaust valve and the pneumatic hydraulic station with the auxiliary exhaust valve provided by the present invention can switch between two states through the auxiliary exhaust valve connected to the two cylinder cavities. In the first state, the third working port and the auxiliary exhaust port are connected, and the connection between the fourth working port and the auxiliary exhaust port is cut off, so as to assist the exhaust of the first air cavity to avoid the cylinder piston from being stuck, and when the reversing valve is not switched into place, that is, in a neutral state so that the first air cavity is filled with air and the second air cavity is not exhausted, the gas entering the first air cavity is discharged, so that the cylinder piston can move toward the cylinder end cover on the first air cavity side under the action of the air pressure in the second air cavity, thereby triggering the reversing triggering device to make the reversing valve switch into place, control the reversing valve to switch until the corresponding exhaust port and the air inlet are connected, and switch to the state where the first air cavity is filled with air and the second air cavity is exhausted, so as to avoid the cylinder piston stopping and causing no hydraulic pressure to be output, that is, to avoid the cylinder and the reversing valve from stopping moving and causing no hydraulic pressure to be output. When the cylinder piston is in a jammed state, the tool loses pressure, resulting in the workpiece being loosely clamped or hitting the tool, etc.; and in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off to assist in exhausting the second air cavity to avoid the cylinder piston from being jammed, and when the reversing valve is not in the reverse direction, that is, in the neutral state, so that the second air cavity is intaken and the first air cavity is not exhausted, the gas entering the second air cavity is discharged, so that the cylinder piston can move toward the cylinder end cover on the first air cavity side under the action of the air pressure in the first air cavity, thereby triggering the reversing trigger device to make the reversing valve reverse into place, and control the reversing valve to reverse until the corresponding exhaust port and the air inlet port are connected, and switch to the state where the first air cavity is intaken and the second air cavity is exhausted, to avoid the cylinder piston stopping moving, that is, getting stuck, resulting in no hydraulic output, that is, to avoid the cylinder from getting jammed, the tool loses pressure, resulting in the workpiece being loosely clamped or hitting the tool, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 cylinder piston in a pneumatic hydraulic station provided by an embodiment of the present invention during the process of moving to the left; Figure 4 A schematic diagram of the structure of a cylinder piston in a pneumatic hydraulic station provided by an embodiment of the present invention during the process of moving to the right; Figure 5A schematic diagram of the structure of an auxiliary exhaust valve provided in an embodiment of the present invention; wherein the fourth working port is connected to the auxiliary exhaust port; Figure 6 A schematic diagram of the structure of an auxiliary exhaust valve provided in an embodiment of the present invention; wherein the third working port is connected to the auxiliary exhaust port; Figure 7 for Figure 5 A partial enlarged view of the M in the middle; Figure 8 for Figure 5 A local enlarged view of the N position in the middle; Fig. 9 A schematic diagram of the structure of an in-hole sealed auxiliary exhaust valve provided by an embodiment of the present invention; wherein the third working port is connected to the auxiliary exhaust port; Fig.10 A schematic diagram of the structure of an in-hole sealed auxiliary exhaust valve provided in an embodiment of the present invention; wherein the fourth working port is connected to the auxiliary exhaust port; Fig.11 A schematic diagram of the structure of an in-hole sealed auxiliary exhaust valve housing provided by an embodiment of the present invention; Fig.12 A schematic diagram of the structure of an in-hole sealed auxiliary exhaust valve core provided in an embodiment of the present invention; Fig.13 A cross-sectional view of an in-hole sealed auxiliary exhaust valve core at a connecting groove provided by an embodiment of the present invention; Fig.14 A schematic diagram of the structure of an end-mounted sealed auxiliary exhaust valve provided in an embodiment of the present invention; wherein the fourth working port is connected to the auxiliary exhaust port; Fig.15 A schematic structural diagram of an end-face mounted sealed auxiliary exhaust valve provided in an embodiment of the present invention; wherein the third working port is connected to the auxiliary exhaust port.

[0022] Fig.16 A schematic diagram of the structure of a bevel-mounted sealed auxiliary exhaust valve provided in an embodiment of the present invention; wherein the fourth working port is connected to the auxiliary exhaust port; Fig.17 A schematic diagram of the structure of a bevel-mounted sealed auxiliary exhaust valve provided in an embodiment of the present invention; wherein the third working port is connected to the auxiliary exhaust port; Explanation of the reference numerals: 1-cylinder, 11-cylinder piston, 12-first air cavity, 13-second air cavity, 2-oil cylinder, 21-oil cylinder piston, 3-first reversing trigger device, E-second air inlet, C-third exhaust port, 4-second reversing trigger device, F-third air inlet, D-fourth exhaust port, 5-reversing valve, P-first air inlet, A-first working port, B-second working port, R1-first exhaust port, R2-first exhaust port, Y-first control port, Z-second control port, 6-linkage rod, 7-auxiliary exhaust valve, 71-auxiliary exhaust valve housing, 711-auxiliary exhaust valve cavity, 7111-first large-diameter exhaust cavity, 7112-small-diameter exhaust cavity, 7113-second large-diameter exhaust cavity, 712-first Limiting part, 713-second limiting part, 714-sliding fitting protrusion, 715-first step structure, 716-second step structure, 717-first inclined support structure, 718-second inclined support structure, 72-auxiliary exhaust valve core, 721-connecting channel, 722-first large diameter valve core, 723-small diameter valve core, 724-second large diameter valve core, 725-first connecting groove, 726-second connecting groove, 727-first end face sealing structure, 728-second end face sealing structure, 729-first inclined sealing structure, 7210-second inclined sealing structure, 73-first sealing ring, 74-second sealing ring, 8-muffler, S-auxiliary exhaust port, G-third working port, H-fourth working port. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 3 and Figure 4 , which shows the preferred structure of the pneumatic hydraulic station provided by the embodiment of the present invention. As shown in the figure, the pneumatic hydraulic station includes: a cylinder 1, an oil cylinder 2, a reversing valve assembly and an auxiliary exhaust valve 7.

[0025] The oil cylinder piston 21 of the oil cylinder 2 is connected to the cylinder piston 11 of the air cylinder 1 through a linkage rod 6, and the linkage rod 6 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 21 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.

[0026] 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 6, and the linkage rod 6 passes through the through hole. In this embodiment, the two ends of the linkage rod 6 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.

[0027] The cylinder 2 is connected to a reversing valve assembly for controlling the reversing movement of the cylinder piston 11 of the cylinder 1. The reversing valve assembly includes a reversing trigger device that can send a signal that the cylinder piston 11 moves into position and a reversing valve 5 that switches the intake and exhaust of the two cylinder cavities of the cylinder 1 in sequence according to the signal of the reversing trigger device.

[0028] Specifically, there may be two reversing trigger devices, namely, a first reversing trigger device 3 and a second reversing trigger device 4. The first reversing trigger device 3 and the second reversing trigger device 4 are respectively arranged at the two ends of the cylinder 1 to respectively obtain whether the cylinder piston 11 has moved to the two ends and is capable of sending a corresponding moving-in-place signal when the cylinder piston 11 has moved to the two ends. The reversing valve 5 is respectively connected to the first reversing trigger device 3 and the second reversing trigger device 4, and switches the intake and exhaust of the two cylinder cavities of the cylinder 1 in sequence according to the moving-in-place signal sent by the first reversing trigger device 3 and the second reversing trigger device 4.

[0029] Continue to see Figure 3 The cylinder includes: a cylinder body, a cylinder piston 11 and a cylinder end cover; wherein the cylinder piston 11 can slide along the inner wall of the cylinder body and form an airtight seal with the inner wall of the cylinder body, and the cylinder end covers are arranged at both ends of the cylinder body to seal the cylinder body.

[0030] In one implementation of this embodiment, Figure 3 to Figure 4 As shown, there are two reversing trigger devices, both of which are air-controlled valves, which are respectively arranged on the two cylinder end covers of the cylinder 1, and the reversing valve 5 is a corresponding air-controlled reversing valve.

[0031] Continue to see 3 to Figure 4, the first air inlet P of the reversing valve 5, the second air inlet E of the first reversing trigger device 3, and the third air inlet F of the second reversing trigger device 4 are respectively connected to the air source; the reversing valve 5 includes a first control port Y and a second control port Z, and a first working port A and a second working port B respectively connected to the two cylinder cavities on both sides of the piston of the cylinder 1; the third exhaust port C of the first reversing trigger device 3 is connected to the first control port Y, and after the first reversing trigger device 3 is triggered and opened, a first moving into position signal is sent to the reversing valve 5, and the reversing valve 5 is reversed based on the first moving into position signal to connect the second working port B with the first air inlet P; the fourth exhaust port D of the second reversing trigger device 4 is connected to the second control port Z, and after the second reversing trigger device 4 is triggered and opened, a second moving into position signal is sent to the reversing valve 5, and the reversing valve 5 is reversed based on the second moving into position signal to connect the first working port A with the first air inlet P. That is to say, after the first reversing trigger device 3 is triggered and opened by the cylinder piston 11, the control reversing valve 5 is connected to the first working port A and the first air inlet P; the fourth exhaust port D of the second reversing trigger device 4 is connected to the second control port Z. After the second reversing trigger device 4 is triggered and opened by the cylinder piston 11, the control reversing valve 5 is connected to the second working port B and the first air inlet P. That is to say, in this embodiment, the reversing trigger device is an air-controlled valve. When the cylinder piston 11 moves into place, it can trigger the corresponding reversing trigger device, that is, the air-controlled valve, so that the reversing trigger device can be triggered to open, and then the control port corresponding to the reversing valve 5 is injected with gas and pressurized to push the reversing valve 5 to reverse. That is to say, after the reversing trigger device is triggered and opened, the control port corresponding to the reversing valve 5 is first injected with gas and pressurized as a moving into place signal, that is, an air-controlled signal, to control the reversing valve 5 to reverse.

[0032] Specifically, the first reversing trigger device 3 is arranged at one end of the cylinder 1 (such as Figure 3 The second reversing trigger device 4 is arranged at the other end of the cylinder 1 (as shown in the left end) Figure 3The first reversing trigger device 3 and the second reversing trigger device 4 are partially protruded in the cylinder cavity on both sides of the cylinder piston 11, so that when the cylinder piston 11 moves left and right, the first reversing trigger device 3 and the second reversing trigger device 4 can be triggered and opened respectively. In this embodiment, the first reversing trigger device 3, 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 exhaust port 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 exhaust port C and the second air inlet E. The second air inlet E is connected to the air source, the third exhaust port C is connected to the first control port Y, the start block part is protruded on the outside of the air control valve body, 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 realize the start of the first reversing trigger device 3, so that the start block and the air control valve core slide to the left until the third exhaust port C and the second air inlet E are connected, thereby realizing the connection between the air source and the first control port Y, so that the control cavity corresponding to the first control port Y can be pressurized, so that the reversing valve 5 slides and reverses, that is, the valve core of the reversing valve 5 is pushed to the right, and switched to the position where the first working port A is connected to the first air inlet P, that is, the reversing valve 5 is controlled to connect the first working port A and the first air inlet P, so that the cylinder piston 11 can slide to the right.

[0033] In this embodiment, the structure of the second reversing trigger device 4 is similar to that of the first reversing trigger device 3, that is, the second mechanical valve 4 is provided with a fourth exhaust port D and a third air inlet F, which are connected to the second control port Z and the air source respectively. 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 4, so that the fourth exhaust port D and the third air inlet F are connected, and the second control port Z and the air source are connected, so that the control cavity corresponding to the second control port Z can be pressurized, so that the reversing valve 5 slides and reverses, that is, moves to the left, and switches to the position where the first working port A is connected to the first air inlet P, that is, the control reversing valve 5 is connected to the first working port A 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 4 can refer to the first reversing trigger device 3, and the second reversing trigger device 4 will not be described in detail in this embodiment.

[0034] In another implementation of this embodiment, the reversing trigger device can be an electric control valve, and the reversing valve is a corresponding electromagnetic control valve. When the cylinder piston 11 moves into position, an electrical signal can be sent to the reversing valve, and the reversing valve switches based on the electrical signal to switch the intake and exhaust of the two cylinder cavities.

[0035] Specifically, the move-in-place signal is an electrical signal, and the reversing trigger device can be an electrically controlled valve and there are two of them, which are respectively arranged on the two cylinder end covers of the cylinder 1 to obtain whether the cylinder piston 11 moves to the two ends and moves into place. When the cylinder piston 11 moves into place, the reversing trigger device sends a corresponding side move-in-place signal to the reversing valve, and the reversing valve 5 switches the intake and exhaust of the two cylinder cavities in turn based on the move-in-place signal. For example, when the cylinder piston 11 moves to the left and into place, the reversing trigger device arranged on the left cylinder end cover of the cylinder can send a move-in-place signal to the reversing valve 5, and the reversing valve 5 switches the intake and exhaust of the two cylinder cavities in turn based on the move-in-place signal. Reversing, connecting the first working port A with the first air inlet P, and connecting the second working port B with the second exhaust port R2, so as to switch the air intake of the left cylinder cavity of the cylinder 1 and the exhaust of the right cylinder cavity, so that the cylinder piston 11 moves to the right; when the cylinder piston 11 moves to the right and is in position, the reversing trigger device arranged on the right cylinder end cover of the cylinder can send a moving-in-position signal to the reversing valve 5, and the reversing valve 5 switches based on the moving-in-position signal, connecting the second working port B with the first air inlet P, and connecting the first working port A with the first exhaust port R1, so as to switch the air intake of the right cylinder cavity of the cylinder 1 and the exhaust of the left cylinder cavity.

[0036] In this embodiment, the auxiliary exhaust valve 7 is connected to the two cylinder cavities respectively. When one cylinder cavity is taking in air and the other cylinder cavity is exhausting air, the auxiliary exhaust valve 7 connects the other cylinder cavity with the outside to perform auxiliary exhaust for the other cylinder cavity.

[0037] Specifically, the two cylinder cavities are respectively a first air cavity 12 on the left and a second air cavity 13 on the right. The auxiliary exhaust valve 7 is connected to the first air cavity 12 and the second air cavity 13 respectively. When the first air cavity 12 is inlet and the second air cavity 13 is exhausted, the second air cavity 13 is connected with the outside to assist exhaust of the second air cavity 13, so as to avoid the cylinder piston 11 from being stuck due to insufficient intake pressure of the first air cavity 12, that is, the auxiliary exhaust valve 7 cooperates with the second working port B of the reversing valve 5 to exhaust the second air cavity 13 in a coordinated manner; when the second air cavity 13 is inlet and the first air cavity 12 is exhausted, the first air cavity 12 is connected with the outside to assist exhaust of the first air cavity 12, so as to avoid the cylinder piston 11 from being stuck due to insufficient intake pressure of the first air cavity 12. The stuck phenomenon caused by insufficient intake pressure in the second air chamber 13 is achieved by coordinating the exhaust of the first air chamber 12 through the auxiliary exhaust valve 7 in cooperation with the first working port A of the reversing valve 5; further, when the cylinder piston 11 is stuck, the auxiliary exhaust valve 7 discharges the gas in the first air chamber 12, so that the cylinder piston 11 can move toward the cylinder end cover on the side of the first air chamber 12 under the action of the air pressure in the second air chamber 13, thereby triggering the first reversing trigger device 3 to reverse the valve core of the reversing valve 5 and switch to the state where the first air chamber 12 is intaken and the second air chamber 13 is exhausted, so that the cylinder piston 11 moves to the right. The auxiliary exhaust valve 7 discharges the gas in the first air cavity 12 or the second air cavity 13, so that the cylinder piston 11 can move toward the cylinder end cover on the side of the first air cavity 12 or the second air cavity 13 under the action of the air pressure in the second air cavity 13 or the first air cavity 12, thereby triggering the reversing trigger device to reverse the valve core of the reversing valve 5 and switch to a state where the other cylinder cavity is intake and the one cylinder cavity is exhaust; further, when the cylinder piston 11 is stuck, the auxiliary exhaust valve 7 discharges the gas in the second air cavity 13, so that the cylinder piston 11 can move toward the cylinder end cover on the side of the second air cavity 13 under the action of the air pressure in the first air cavity 12, thereby triggering the second reversing trigger device 4 to reverse the valve core of the reversing valve 5 and switch to a state where the second air cavity 13 is intake and the first air cavity 12 is exhaust, so that the cylinder piston 11 moves to the left.

[0038] In this embodiment, when the reversing valve core is in the middle position so that one of its air chambers is inlet with air and the other air chamber is not exhausted, that is, when the reversing valve 5 is not in place, the auxiliary exhaust valve 7 exhausts the other cylinder chamber.

[0039] Specifically, when the first air cavity 12 is inletting air and the second air cavity 13 is exhausted, the auxiliary exhaust valve 7 connects the second air cavity 13 with the outside world. This auxiliary exhaust valve 7 connects the first air cavity 12 with the outside world until the second air cavity 13 is inletting air and the first air cavity 12 is exhausted. It can be known from this that, from the time when the first working port A of the reversing valve 5 is connected with the first air inlet P and the second working port B is connected with the second exhaust port R2, until the time when the second working port B is connected with the first air inlet P and the first working port A is connected with the first exhaust port R1, the auxiliary exhaust valve 7 connects the second air cavity 13 with the outside, especially when the valve core of the reversing valve is in the middle position so that the second working port B is just connected with the first air inlet P and the first working port A is not connected with the first exhaust port R1, that is, when the second air cavity 13 is inlet and the first air cavity 12 is not exhausted, the gas in the second air cavity 13 can be discharged through the auxiliary exhaust valve 7, especially the intake air in the second air cavity 13 can be discharged, the first working port A is not connected with the first exhaust port R1 so that the air pressure in the first air cavity 12 is maintained, so that the cylinder piston 11 can move towards the cylinder end cover on the side of the second air cavity 13 under the action of the air pressure in the first air cavity 12 (such as Figure 3 The second reversing trigger device 4 is triggered to make the reversing valve 5 reversing to the right position, and the valve core of the reversing valve 5 is controlled to continue to move to the left for reversing, so as to connect the second working port B with the first air inlet P, and connect the first working port A with the first exhaust port R1, and switch to the state where the second air cavity 13 is inlet and the first air cavity 12 is exhausted. When the second air cavity 13 is inlet and the first air cavity 12 is exhausted, the auxiliary exhaust valve 7 can be connected to the first air cavity 12 and the outside until the first air cavity 12 is inlet and the second air cavity 13 is exhausted. It can be known from this that, from the time when the second working port B of the reversing valve 5 is connected with the first air inlet P and the first working port A is connected with the first exhaust port R1, until the first working port A is connected with the first air inlet P and the second working port B is connected with the second exhaust port R2, the auxiliary exhaust valve 7 connects the first air cavity 12 with the outside, especially when the valve core of the reversing valve is in the middle position so that the first working port A is just connected with the first air inlet P and the second working port B is not connected with the second exhaust port R2, that is, when the first air cavity 12 is inlet and the second air cavity 13 is not exhausted, the gas in the first air cavity 12 can be discharged through the auxiliary exhaust valve 7, especially the intake air in the first air cavity 12 can be discharged, the second working port B is not connected with the second exhaust port R2 so that the air pressure in the second air cavity 13 is maintained, so that the cylinder piston 11 can move toward the cylinder end cover on the side of the first air cavity 12 under the action of the air pressure in the second air cavity 13 (such as Figure 4 The first reversing trigger device 3 is triggered to make the reversing valve 5 reversing to the right, and the valve core of the reversing valve 5 is controlled to move rightward for reversing, so as to connect the first working port A with the first air inlet P, and connect the second working port B with the second exhaust port R2, and switch to the state where the first air cavity 12 is inlet and the second air cavity 13 is exhausted.

[0040] In this embodiment, the auxiliary exhaust valve 7 is connected to the first air cavity 12 and the second air cavity 13 respectively. When air is taken in by the first air cavity 12 and air is exhausted by the second air cavity 13, the second air cavity 13 is connected with the outside world, and the connection between the first air cavity 12 and the outside world is cut off; when air is taken in by the second air cavity 13 and air is exhausted by the first air cavity 12, the first air cavity 12 is connected with the outside world, and the connection between the second air cavity 13 and the outside world is cut off.

[0041] In the first embodiment of the auxiliary exhaust valve 7 of this embodiment, see Figure 5 to Figure 6 The auxiliary exhaust valve 7 includes: a third working port H, a fourth working port G and an auxiliary exhaust port S; wherein the third working port H and the fourth working port G are respectively connected to the first air cavity 12 and the second air cavity 13, and the auxiliary exhaust port S is used for auxiliary exhaust of the first air cavity 12 or the second air cavity 13.

[0042] Specifically, when air is taken in by the first air cavity 12 and air is exhausted by the second air cavity 13, the fourth working port G is connected with the auxiliary exhaust port S to exhaust the second air cavity 13, and the connection between the third working port H and the auxiliary exhaust port S is cut off; when air is taken in by the second air cavity 13 and air is exhausted by the first air cavity 12, the third working port H is connected with the auxiliary exhaust port S to exhaust the first air cavity 12, and the connection between the fourth working port G and the auxiliary exhaust port S is cut off. The auxiliary exhaust valve 7 and the reversing valve 5 can be arranged in parallel, and the first working port A and the third working port H are respectively connected to the first air cavity 12. Preferably, the first working port A and the third working port H are each connected to the first air cavity 12 through a connecting passage. Of course, the third working port H can also be connected to the pipeline between the first working port A and the first air cavity 12; the fourth working port G and the second working port B are respectively connected to the second air cavity 13. Preferably, the second working port B and the fourth working port G are each connected to the second air cavity 13 through a connecting passage. Of course, the fourth working port G can also be connected to the pipeline between the second working port B and the second air cavity 13. When the first air cavity 12 is inlet and the second air cavity 13 is exhausted, the fourth working port G is connected with the auxiliary exhaust port S to exhaust the first air cavity 13 and relieve the air pressure in the second air cavity 13. At the same time, the third working port H is disconnected from the auxiliary exhaust port S to cut off the exhaust and pressure relief of the first air cavity 12. When the second air cavity 13 is inlet and the first air cavity 12 is exhausted, the third working port H is connected with the auxiliary exhaust port S to exhaust the first air cavity 12 and relieve the air pressure in the first air cavity 12. At the same time, the fourth working port G is disconnected from the auxiliary exhaust port S to cut off the exhaust and pressure relief of the second air cavity 13. In this embodiment, a muffler 8 may be provided at the auxiliary exhaust port S.

[0043] Continue to see Figure 5 and Figure 6The auxiliary exhaust valve 7 comprises: an auxiliary exhaust valve housing 71 and an auxiliary exhaust valve core 72; wherein the auxiliary exhaust valve housing 71 is provided with an auxiliary exhaust valve chamber 711, a third working port G, a fourth working port H and an auxiliary exhaust port S; the auxiliary exhaust valve core 72 is slidably arranged in the auxiliary exhaust valve chamber 711 to slide to a first state and a second state; the third working port G and the fourth working port H are respectively connected to two ends of the auxiliary exhaust valve chamber 711 (such as Figure 5 The auxiliary exhaust valve core 72 is connected to the auxiliary exhaust port S (left and right ends shown in the figure), and is used to apply a force to the auxiliary exhaust valve core 72 so that the auxiliary exhaust valve core 72 slides to the first state or the second state; when in the second state, the fourth working port H is connected to the auxiliary exhaust port S, and the connection between the third working port G and the auxiliary exhaust port S is cut off; when in the first state, the third working port G is connected to the auxiliary exhaust port S, and the connection between the fourth working port H and the auxiliary exhaust port S is cut off. The auxiliary exhaust valve core 72 is in the second state when the first air cavity 12 is inlet and the second air cavity 13 is exhausted, and the fourth working port H is connected to the auxiliary exhaust port S, and the connection between the third working port G and the auxiliary exhaust port S is cut off; the auxiliary exhaust valve core 72 is in the first state when the second air cavity 13 is inlet and the first air cavity 12 is exhausted, and the third working port G is connected to the auxiliary exhaust port S, and the connection between the fourth working port H and the auxiliary exhaust port S is cut off.

[0044] Specifically, the auxiliary exhaust valve housing 71 is provided with an auxiliary exhaust valve chamber 711, and the auxiliary exhaust valve chamber 711 is provided along its length direction (eg Figure 5 The auxiliary exhaust valve core 72 is arranged in the auxiliary exhaust valve chamber 711 in a slidable manner, so as to control the air pressure at both ends of the auxiliary exhaust valve chamber 711 through the air intake and exhaust of the third working port G and the fourth working port H, thereby pushing the auxiliary exhaust valve core 72 to slide left and right, so as to slide to the position as shown in the figure. Figure 6 The first state shown or Figure 5 The second state is shown.

[0045] In this embodiment, the auxiliary exhaust valve housing 71 is provided with a first limiting portion 712 and a second limiting portion 713, which are used to limit and support the auxiliary exhaust valve core 72, so that the auxiliary exhaust valve core 72 is in the first state and the second state, respectively. Figure 5As shown, when the auxiliary exhaust valve core 72 slides to the right side and presses against the left side wall of the second limiting portion 713, the auxiliary exhaust valve core 72 is in the second state, that is, the second limiting portion 713 limits the position of the auxiliary exhaust valve core 72 in the second state; Figure 6 As shown, when the auxiliary exhaust valve core 72 slides to the left side and contacts the right side wall of the first limiting portion 712, the auxiliary exhaust valve core 72 is in the first state, that is, the auxiliary exhaust valve core 72 is limited and supported in the first state by the first limiting portion 712. The first limiting portion 712 and the second limiting portion 713 can be limiting support plates, and the limiting support plates are provided with connecting holes, which can connect the cavities on both sides of the limiting support plates. Of course, the first limiting portion 712 and the second limiting portion 713 can also be other structures, such as limiting springs, etc., which are not limited in this embodiment.

[0046] like Figure 3 As shown in FIG. 1 , when the first air cavity 12 is inlet and the second air cavity 13 is exhausted, the third working port G is inlet and the fourth working port H is exhausted, so that the left and right ends of the auxiliary exhaust valve cavity 711 are inlet and exhaust, respectively, and then the auxiliary exhaust valve core 72 is pushed to slide to the right under the air pressure at the left end of the auxiliary exhaust valve cavity 711 until the auxiliary exhaust valve core 72 is pushed to slide to the right until the auxiliary exhaust valve cavity 711 is inlet and exhaust, and the auxiliary exhaust valve core 72 is pushed to slide to the right under the air pressure at the left end of the auxiliary exhaust valve cavity 711. Figure 5 The right side wall of the auxiliary exhaust valve core 72 shown is pressed against the left side wall of the second limiting portion 713, and the auxiliary exhaust valve core 72 is in the second state, connecting the fourth working port H with the auxiliary exhaust port S, and cutting off the connection between the third working port G and the auxiliary exhaust port S.

[0047] like Figure 4 As shown in FIG. 1 , when the second air cavity 13 is inlet and the first air cavity 12 is exhausted, the fourth working port H is inlet and the third working port G is exhausted, so that the left and right ends of the auxiliary exhaust valve cavity 711 are exhausted and inlet respectively, and then the auxiliary exhaust valve core 72 is pushed to slide to the left under the action of the air pressure at the right end of the auxiliary exhaust valve cavity 711 until the auxiliary exhaust valve core 72 is pushed to slide to the left until the auxiliary exhaust valve core 72 is pushed to slide to the left under the action of the air pressure at the right end of the auxiliary exhaust valve cavity 711. Figure 6 The left side wall of the auxiliary exhaust valve core 72 shown is pressed against the right side wall of the first limiting portion 712, and the auxiliary exhaust valve core 72 is in the first state, connecting the third working port G with the auxiliary exhaust port S, and cutting off the connection between the fourth working port H and the auxiliary exhaust port S.

[0048] Continue to see Figures 5 to 9 A sliding fit protrusion 714 is provided on the inner wall of the auxiliary exhaust valve housing 71 at the middle position of the auxiliary exhaust valve cavity 711, and the auxiliary exhaust valve core 72 is slidably connected to the sliding fit protrusion 714; wherein the auxiliary exhaust port S is opened on the sliding fit protrusion 714.

[0049] Specifically, a sliding fit protrusion 714 is provided at the middle position of the inner wall of the auxiliary exhaust valve housing 71. The sliding fit protrusion 714 can be provided along the entire circumference of the inner wall of the auxiliary exhaust valve housing 71. The sliding fit protrusion 714 is adapted to the outer diameter of the auxiliary exhaust valve core 72. The inner wall of the sliding fit protrusion 714 and the outer wall of the auxiliary exhaust valve core 72 are slidably connected to guide the sliding of the auxiliary exhaust valve core 72. In this embodiment, the inner wall of the sliding fit protrusion 714 and the outer wall of the auxiliary exhaust valve core 72 are gap-fitted to ensure the smoothness of the switching of the auxiliary exhaust valve core 72. Of course, other matching methods can also be used between the two, and this embodiment does not impose any limitation thereon. The provision of the sliding fit protrusion 714 allows the auxiliary exhaust valve cavity 711 to extend from one end to the other end as shown in FIG. Figure 5 From left to right, a first large-diameter exhaust chamber 7111, a small-diameter exhaust chamber 7112, and a second large-diameter exhaust chamber 7113 are formed in sequence, and the diameters of the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113 are the same and larger than the diameter of the small-diameter exhaust chamber 7112. The first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113 are respectively connected to the third working port G and the fourth working port H, and can respectively realize the air intake and exhaust in the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113, so as to push the auxiliary exhaust valve core 72 to slide left and right. Among them, the auxiliary exhaust valve housing 71 and the sliding mating protrusion 714 are an integrated structure. The auxiliary exhaust port S is provided on the sliding mating protrusion 714, and one end (such as Figure 5 The bottom end shown in FIG. 1 is connected to the small diameter exhaust cavity 7112, and the other end (as shown in FIG. Figure 5 The top end shown is an open end and can be connected to the outside world.

[0050] Continue to see Figures 5 to 8 A connecting passage 721 is provided on the auxiliary exhaust valve core 72. When the auxiliary exhaust valve core 72 is in the second state, the connecting passage 721 is at least partially located between the fourth working port H and the auxiliary exhaust port S, connecting the fourth working port H with the auxiliary exhaust port S to form a second auxiliary exhaust passage. When the auxiliary exhaust valve core 72 is in the first state, the connecting passage 721 is at least partially located between the third working port G and the auxiliary exhaust port S, connecting the third working port G with the auxiliary exhaust port S to form a first auxiliary exhaust passage.

[0051] Specifically, in the present embodiment, a circumferential notch is provided on the entire outer circumference at the middle position of the auxiliary exhaust valve core 72 as a connecting passage 721, so that the auxiliary exhaust valve core 72 forms a first large-diameter valve core 722, a small-diameter valve core 723 and a second large-diameter valve core 723 from one end to the other end in sequence, and the outer diameters of the first large-diameter valve core 722 and the second large-diameter valve core 723 are the same and larger than the outer diameter of the small-diameter valve core 723. In particular, the outer diameters of the first large-diameter valve core 722 and the second large-diameter valve core 723 match the diameter of the small-diameter exhaust cavity 7112, that is, the outer walls of the first large-diameter valve core 722 and the second large-diameter valve core 723 can be connected with the sliding-fitting protrusion 714 in a sliding fit, and a circumferential passage can be formed between the outer wall of the small-diameter valve core 723 and the inner wall of the sliding-fitting protrusion 714, so as to realize the connection between the third working port G and the auxiliary exhaust port S, or realize the connection between the fourth working port H and the auxiliary exhaust port S. In the present embodiment, the length of the connecting passage 721 (such as Figure 5 The length in the horizontal direction shown in FIG. 1 ) that is, the length of the small-diameter valve core 723 may be less than or equal to the length of the sliding fitting protrusion 714 (such as Figure 5 The length in the horizontal direction as shown in the figure) ensures that the small-diameter valve core 723 slides toward the first large-diameter exhaust cavity 7111 until the auxiliary exhaust valve core 72 is in the first state, such as Figure 6 As shown, the first large-diameter exhaust cavity 7111 is connected to the small-diameter valve core 723 to form a first auxiliary exhaust channel. At the same time, the second large-diameter valve core 723 is at least partially placed at the small-diameter exhaust cavity 7112 to cut off the communication between the small-diameter exhaust cavity 7112 and the second large-diameter exhaust cavity 7113. When the auxiliary exhaust valve core 72 is in the second state, as shown in FIG. Figure 5 As shown, the small-diameter exhaust chamber 7112 is connected to the second large-diameter exhaust chamber 7113 to form a second auxiliary exhaust channel. At the same time, the first large-diameter valve core 721 is at least partially placed in the small-diameter exhaust chamber 7112 to cut off the connection between the first large-diameter exhaust chamber 7111 and the small-diameter valve core 723.

[0052] Of course, in other embodiments, the communication channel 721 may also be other structures, which are not limited in this embodiment. Of course, the communication channel 721 may also be provided on the auxiliary exhaust valve housing 71, and the switching of the intake and exhaust of the third working port G and the fourth working port H may be realized by the relative sliding of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71.

[0053] Continue to see Figures 5 to 8In order to avoid gas leakage when the first auxiliary exhaust passage and the second auxiliary exhaust passage are cut off, preferably, a first sealing ring 73 and a second sealing ring 74 are sleeved on the auxiliary exhaust valve core 72. When the auxiliary exhaust valve core 72 is in the first state, the second sealing ring 74 is located between the fourth working port H and the auxiliary exhaust port S, cutting off the second auxiliary exhaust passage; when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located between the third working port G and the auxiliary exhaust port S, cutting off the first auxiliary exhaust passage.

[0054] Specifically, when the auxiliary exhaust valve core 72 is in the first state, the second sealing ring 74 is located in the circumferential gap between the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71, forming an inner hole seal; when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located in the circumferential gap between the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71, forming an inner hole seal. The first sealing ring 73 and the second sealing ring 74 are respectively sleeved on the first large-diameter valve core 722 and the second large-diameter valve core 723, and the first sealing ring 73 and the second sealing ring 74 can be adapted to the inner wall of the small-diameter exhaust cavity 7112.

[0055] like Figure 5 As shown, when the auxiliary exhaust valve core 72 is in the second state, as shown in FIG. Figure 7 As shown, the first sealing ring 73 is located in the small-diameter exhaust cavity 7112 and is placed on the left side of the auxiliary exhaust port S. The outer wall is pressed against the inner wall of the left section of the sliding mating protrusion 714 placed on the left side of the auxiliary exhaust port S to seal the hole, cut off the connection between the connecting channel 721 and the first large-diameter exhaust cavity 7111, that is, cut off the connection between the first large-diameter exhaust cavity 7111 and the small-diameter exhaust cavity 7112, and can cut off the connection between the auxiliary exhaust port S and the first large-diameter exhaust cavity 7111, that is, cut off the connection between the auxiliary exhaust port S and the third working port G. At the same time, Figure 8 As shown, the second sealing ring 74 is arranged in the second large diameter exhaust chamber 7113, that is, there is a gap between the second sealing ring 74 and the inner wall of the second large diameter exhaust chamber 7113, and the connecting channel 721 is partially located in the second large diameter exhaust chamber 71131, and the other part is located in the small diameter exhaust chamber 7112, thereby realizing the connection between the second large diameter exhaust chamber 7113 and the small diameter exhaust chamber 7112, and then realizing the connection between the auxiliary exhaust port S and the second large diameter exhaust chamber 7113, that is, realizing the connection between the auxiliary exhaust port S and the fourth working port H.

[0056] Similarly, if Figure 6As shown, when the auxiliary exhaust valve core 72 is in the first state, the first sealing ring 73 is arranged in the first large diameter exhaust chamber 7111, that is, there is a gap between the first sealing ring 73 and the first large diameter exhaust chamber 7111, and part of the connecting channel 721 is located in the first large diameter exhaust chamber 7111, and the other part is located in the small diameter exhaust chamber 7112, so as to realize the connection between the first large diameter exhaust chamber 7111 and the small diameter exhaust chamber 7112; at the same time, the second sealing ring 74 is located in the small diameter exhaust chamber 7112 and is placed on the right side of the auxiliary exhaust port S, and the outer wall is pressed and contacted on the inner wall of the right section of the sliding fitting protrusion 714 placed on the right side of the auxiliary exhaust port S, so as to perform sealing in the hole, cut off the connection between the connecting channel 721 and the second large diameter exhaust chamber 7113, and then cut off the connection between the auxiliary exhaust port S and the second large diameter exhaust chamber 7113, that is, cut off the connection between the auxiliary exhaust port S and the fourth working port H.

[0057] In the second embodiment of the auxiliary exhaust valve 7 of this embodiment, as shown in FIG. Figures 9 to 13 , which is different from the first embodiment in that: the length of the communication channel 721 relative to the sliding fitting protrusion 714 and the communication mode between the communication channel 721 and the first large-diameter exhaust chamber 7111 and the second large-diameter exhaust chamber 7113 are as follows: the communication channel 721 is always only located in the small-diameter exhaust chamber 7112 and is communicated with the auxiliary exhaust port S, that is, the communication channel 721 is communicated with the auxiliary exhaust port S, and the communication channel 721 is cut off from the third working port G and the fourth working port H, and the auxiliary exhaust valve core 72 is on both sides of the communication channel 721 (such as Fig. 9The first and second connecting grooves 725 and 726 are respectively provided on the left and right sides of the auxiliary exhaust valve core 72, and the first and second connecting grooves 725 and 726 are both connected to the connecting channel 721; when the auxiliary exhaust valve core 72 is in the first state, the first connecting groove 725 realizes the connection between the connecting channel 721 and the third working port G; when the auxiliary exhaust valve core 72 is in the second state, the second connecting groove 726 realizes the connection between the connecting channel 721 and the fourth working port H. Specifically, the first connecting groove 725 is provided between the connecting channel 721 and the first sealing ring 73, and the second connecting groove 726 is provided between the connecting channel 721 and the second sealing ring 74. The first connecting groove 725 and the second connecting groove 726 are respectively provided on the first large-diameter valve core 721 and the second large-diameter valve core 723. Both the first connecting groove 725 and the second connecting groove 726 can be multiple, and are evenly arranged along the circumference of the first large-diameter valve core 721 and the second large-diameter valve core 723. In this embodiment, four are used as an example for description, and other numbers can be used, and there is no limitation on them in this embodiment. In this embodiment, there can be multiple auxiliary exhaust ports S, and they are evenly arranged along the circumference of the auxiliary exhaust valve shell 71. The two ends of each auxiliary exhaust port S are respectively connected to the outside and the small-diameter exhaust chamber 7112. In this embodiment, four are taken as an example for illustration, and other numbers can be used. There is no limitation on them in this embodiment.

[0058] In this embodiment, the provision of the first connecting groove 725 and the second connecting groove 726 makes the reversing sliding smoother, thereby ensuring the balance and stability of each cavity.

[0059] like Fig. 9 As shown, when the auxiliary exhaust valve core 72 is in the first state, part of the first connecting groove 725 is located in the first large-diameter exhaust chamber 7111, and the other part is located in the small-diameter exhaust chamber 7112, thereby realizing the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, and further realizing the connection between the third working port G and each auxiliary exhaust port S. At the same time, the second connecting groove 726 and the second sealing ring 74 are both arranged in the small-diameter exhaust chamber 7112, cutting off the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, and further cutting off the connection between the fourth working port H and each auxiliary exhaust port S.

[0060] like Fig.10 As shown, when the auxiliary exhaust valve core 72 is in the second state, part of the second connecting groove 726 is located in the second large-diameter exhaust chamber 7113, and the other part is located in the small-diameter exhaust chamber 7112, thereby realizing the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, and further realizing the connection between the fourth working port H and each auxiliary exhaust port S. At the same time, the first connecting groove 725 and the first sealing ring 73 are both arranged in the small-diameter exhaust chamber 7112, cutting off the connection between the connecting channel 721 and the first large-diameter exhaust chamber 7111, and further cutting off the connection between the third working port G and each auxiliary exhaust port S.

[0061] In this embodiment, the auxiliary exhaust valve 7 as a whole has the same structure and principle as the auxiliary exhaust valve 7 in the first embodiment, and the two can be referenced to each other.

[0062] In the third implementation of the auxiliary exhaust valve 7 of this embodiment, as shown in FIG. Fig.14 and Fig.15 The difference between the second embodiment and the second embodiment is that the sealing method of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71 is different, and the limiting method of the auxiliary exhaust valve core 72 is also different.

[0063] In this embodiment, the first end face sealing structure 727 and the second end face sealing structure 728 are respectively provided at both ends of the auxiliary exhaust valve core 72, the first sealing ring 73 is arranged between the auxiliary exhaust valve core 72 and the first end face sealing structure 727, and the second sealing ring 74 is arranged between the auxiliary exhaust valve core 72 and the second end face sealing structure 728. Specifically, the first end face sealing structure 727 and the second end face sealing structure 728 can be large end face structures at both ends, which can achieve position limiting. At the same time, the first end face sealing structure 727, the second end face sealing structure 728 and the auxiliary exhaust valve core 72 can be a three-section split structure.

[0064] Continue to see Fig.14 and Fig.15 A first step structure 715 and a second step structure 716 are provided inside the auxiliary exhaust valve cavity 711 on the auxiliary exhaust valve housing 71. The first step structure 715 and the second step structure 716 correspond to and match the first end face sealing structure 727 and the second end face sealing structure 728 respectively.

[0065] like Fig.14 As shown, when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 is located between the first step structure 715 and the first end face sealing structure 727, forming an end face seal to seal the gap between the first step structure 715 and the first end face sealing structure 727, further avoiding the flow of gas on the first auxiliary exhaust passage, that is, avoiding the communication between the communication channel 721 and the first large diameter exhaust cavity 7111, and further avoiding the communication between the third working port G and each auxiliary exhaust port S. Fig.15 As shown, when the auxiliary exhaust valve core is in the first state, the second sealing ring 74 is located between the second step structure 716 and the second end face sealing structure 728, forming an end face seal to seal the gap between the second step structure 716 and the second end face sealing structure 728, thereby further avoiding the flow of gas on the second auxiliary exhaust passage, that is, avoiding the connection between the connecting channel 721 and the second large diameter exhaust chamber 7113, and further avoiding the connection between the fourth working port H and each auxiliary exhaust port S.

[0066] In this embodiment, the first step structure 715 and the first end face sealing structure 727 are pressed into contact, and the second step structure 716 and the second end face sealing structure 728 are pressed into contact, so as to limit the auxiliary exhaust valve core 72 .

[0067] In the fourth implementation of the auxiliary exhaust valve 7 of this embodiment, as shown in FIG. Fig.16 and Fig.17 The difference between the second embodiment and the second embodiment is that the sealing method of the auxiliary exhaust valve core 72 and the auxiliary exhaust valve housing 71 is different, and the limiting method of the auxiliary exhaust valve core 72 is also different.

[0068] In this embodiment, a first bevel sealing structure 729 and a second bevel sealing structure 7210 are respectively provided at both ends of the auxiliary exhaust valve core 72, a first sealing ring 73 is arranged between the auxiliary exhaust valve core 72 and the first bevel sealing structure 729, a second sealing ring 74 is arranged between the auxiliary exhaust valve core 72 and the second bevel sealing structure 7210, and a first bevel supporting structure 717 and a second bevel supporting structure 718 are provided inside the auxiliary exhaust valve cavity 711 on the auxiliary exhaust valve housing 71, and the first bevel supporting structure 717 and the second bevel supporting structure 718 correspond to the first bevel sealing structure 729 and the second bevel sealing structure 7210, respectively.

[0069] like Fig.16 As shown, when the auxiliary exhaust valve core 72 is in the second state, the first sealing ring 73 presses against the first inclined surface sealing structure 729 to form an inclined surface seal to seal the gap between the first inclined surface support structure 717 and the first inclined surface sealing structure 729, further avoiding the flow of gas in the first auxiliary exhaust passage, that is, avoiding the communication between the communication channel 721 and the first large-diameter exhaust cavity 7111, and further avoiding the communication between the third working port G and each auxiliary exhaust port S. Fig.17 As shown, when the auxiliary exhaust valve core is in the first state, the second sealing ring 74 presses against the second bevel sealing structure 7210 to form a bevel seal to seal the gap between the second bevel support structure 718 and the second bevel sealing structure 7210, thereby further avoiding the flow of gas on the second auxiliary exhaust passage, that is, avoiding the connection between the connecting channel 721 and the second large-diameter exhaust chamber 7113, and further avoiding the connection between the fourth working port H and each auxiliary exhaust port S.

[0070] In this embodiment, the first sloped support structure 717 and the first sloped sealing structure 729 are pressed into contact, and the second sloped support structure 718 and the second sloped sealing structure 7210 are pressed into contact, so as to limit the auxiliary exhaust valve core 72 .

[0071] In summary, the auxiliary exhaust valve and the pneumatic hydraulic station with the auxiliary exhaust valve provided in the present embodiment can switch between two states through the auxiliary exhaust valve 7 connected to the two cylinder cavities. In the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off, so as to assist the exhaust of the first air cavity 12 to avoid the cylinder piston 11 from being stuck, and can discharge the gas entering the first air cavity 12 when the reversing valve is not in the reverse direction, that is, in the middle state so that the first air cavity 12 is inhaled and the second air cavity 13 is not exhausted, so that the cylinder piston can move toward the cylinder end cover on the side of the first air cavity 12 under the action of the air pressure in the second air cavity 13, thereby triggering the reversing trigger device to make the reversing valve reverse in place, control the reversing valve 5 to reverse until the corresponding exhaust port and the air inlet are connected, and switch to the state where the first air cavity 12 is inhaled and the second air cavity 13 is exhausted, so as to avoid the cylinder piston stopping and causing no hydraulic pressure to be output, that is, to avoid the cylinder, The reversing valve and the like are stuck, and the tooling loses pressure, resulting in the workpiece being not clamped tightly, hitting the tool, etc.; and in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off to assist the exhaust of the second air chamber 13 to avoid the cylinder piston 11 from being stuck, and when the reversing valve is not switched into place, that is, in the middle state, so that the second air chamber 13 is inhaled and the first air chamber 12 is not exhausted, the gas entering the second air chamber 13 is discharged, so that the cylinder piston can move toward the cylinder end cover on the side of the first air chamber 12 under the action of the air pressure in the first air chamber 12, thereby triggering the reversing trigger device to make the reversing valve switch into place, control the reversing valve 5 to switch until the corresponding exhaust port and the air inlet are connected, and switch to the state where the first air chamber 12 is inhaled and the second air chamber 13 is exhausted, to avoid the cylinder piston stopping moving, that is, getting stuck, resulting in no hydraulic output, that is, to avoid the cylinder being stuck, and the tooling losing pressure resulting in the workpiece being not clamped tightly, hitting the tool, etc.

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

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

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

Claims

1. An auxiliary exhaust valve, characterized in that: It includes an auxiliary exhaust valve housing and an auxiliary exhaust valve core; wherein, The auxiliary exhaust valve housing is provided with an auxiliary exhaust valve cavity, a third working port, a fourth working port and an auxiliary exhaust port; the auxiliary exhaust valve core is slidably arranged in the auxiliary exhaust valve cavity to slide to a first state or a second state; The third working port and the fourth working port are respectively connected to the two ends of the auxiliary exhaust valve cavity, and are used to apply a force to the auxiliary exhaust valve core so that the auxiliary exhaust valve core slides to a first state or a second state: in the first state, the third working port is connected to the auxiliary exhaust port, and the connection between the fourth working port and the auxiliary exhaust port is cut off; in the second state, the fourth working port is connected to the auxiliary exhaust port, and the connection between the third working port and the auxiliary exhaust port is cut off.

2. An auxiliary exhaust valve according to claim 1, characterized in that: A connecting passage is provided on the auxiliary exhaust valve core or on the auxiliary exhaust valve housing; when the auxiliary exhaust valve core is in the second state, the connecting passage is at least partially located between the fourth working port and the auxiliary exhaust port, connecting the fourth working port and the auxiliary exhaust port to form a second auxiliary exhaust passage; when the auxiliary exhaust valve core is in the first state, the connecting passage is at least partially located between the third working port and the auxiliary exhaust port, connecting the third working port and the auxiliary exhaust port to form a first auxiliary exhaust passage.

3. An auxiliary exhaust valve according to claim 2, characterized in that: A first sealing ring and a second sealing ring are sleeved on the auxiliary exhaust valve core. When the auxiliary exhaust valve core is in a first state, the second sealing ring is located between the fourth working port and the auxiliary exhaust port, cutting off the second auxiliary exhaust passage; when the auxiliary exhaust valve core is in a second state, the first sealing ring is located between the third working port and the auxiliary exhaust port, cutting off the first auxiliary exhaust passage.

4. An auxiliary exhaust valve according to claim 3, characterized in that: A circumferential gap is provided between the auxiliary exhaust valve core and the auxiliary exhaust valve housing. The second sealing ring is used to be located in the circumferential gap between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in a first state, so as to form an in-hole seal. The first sealing ring is used to be located in the circumferential gap between the auxiliary exhaust valve core and the auxiliary exhaust valve housing when the auxiliary exhaust valve core is in a second state, so as to form an in-hole seal.

5. The auxiliary exhaust valve according to claim 3, characterized in that: The two ends of the auxiliary exhaust valve core are respectively provided with a first end face sealing structure and a second end face sealing structure, the first sealing ring is arranged between the auxiliary exhaust valve core and the first end face sealing structure, and the second sealing ring is arranged between the auxiliary exhaust valve core and the second end face sealing structure.

6. An auxiliary exhaust valve according to claim 5, characterized in that: A first step structure and a second step structure are provided on the auxiliary exhaust valve housing inside the auxiliary exhaust valve cavity, and the first step structure and the second step structure correspond to the first end face sealing structure and the second end face sealing structure respectively. The second sealing ring is used when the auxiliary exhaust valve core is in the first state, and is located between the second step structure and the second end face sealing structure to form an end face sealing to seal the gap between the second step structure and the second end face sealing structure; the first sealing ring is used when the auxiliary exhaust valve core is in the second state, and is located between the first step structure and the first end face sealing structure to form an end face sealing to seal the gap between the first step structure and the first end face sealing structure.

7. The auxiliary exhaust valve according to claim 3, characterized in that: The two ends of the auxiliary exhaust valve core are respectively provided with a first inclined surface sealing structure and a second inclined surface sealing structure, the first sealing ring is arranged between the auxiliary exhaust valve core and the first inclined surface sealing structure, and the second sealing ring is arranged between the auxiliary exhaust valve core and the second inclined surface sealing structure; A first inclined surface supporting structure and a second inclined surface supporting structure are provided on the auxiliary exhaust valve housing inside the auxiliary exhaust valve cavity, and the first inclined surface supporting structure and the second inclined surface supporting structure correspond to the first inclined surface sealing structure and the second inclined surface sealing structure respectively; the second sealing ring is used for pressing and contacting the second inclined surface sealing structure when the auxiliary exhaust valve core is in the first state, so as to form an inclined surface sealing to seal the gap between the second inclined surface sealing structure and the second inclined surface supporting structure; the first sealing ring is used for pressing and contacting the first inclined surface sealing structure when the auxiliary exhaust valve core is in the second state, so as to form an inclined surface sealing to seal the gap between the first inclined surface sealing structure and the first inclined surface supporting structure.

8. An auxiliary exhaust valve according to any one of claims 1 to 7, characterized in that: The auxiliary exhaust valve housing is provided with a sliding fit protrusion at the middle position of the auxiliary exhaust valve cavity, and the auxiliary exhaust valve core is slidably connected to the sliding fit protrusion; the auxiliary exhaust port is opened on the sliding fit protrusion.

9. An auxiliary exhaust valve according to any one of claims 1 to 7, characterized in that: The auxiliary exhaust valve housing is provided with a first limiting portion and a second limiting portion, which are used to respectively limit and support the auxiliary exhaust valve core so that the auxiliary exhaust valve core is in a first state and a second state respectively.

10. A pneumatic hydraulic station, comprising a cylinder and the auxiliary exhaust valve according to any one of claims 1 to 9, wherein the third working port of the auxiliary exhaust valve is connected to the first air cavity of the cylinder, and the fourth working port of the auxiliary exhaust valve is connected to the second air cavity of the cylinder.

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