A gas-liquid hybrid valve

Abstract

The present invention provides a gas-liquid hybrid valve, comprising a hybrid valve body and a valve body piston rod, the valve body piston rod is slidably installed in the hybrid valve body, the hybrid valve body comprises a pneumatic valve body and a hydraulic valve body assembly connected to each other, the valve body piston rod comprises a piston rod, a cylinder piston and an oil cylinder piston connected to each other, the oil cylinder piston is slidably installed in the hydraulic valve body assembly, the cylinder piston is slidably installed in the pneumatic valve body, a pneumatic reversing valve is installed on the pneumatic valve body, correspondingly, a reversing air path is dug in the pneumatic valve body, the reversing air path is connected to the pneumatic reversing valve, the reversing of the pneumatic reversing valve is controlled, the pneumatic reversing valve is reversed by the reversing air path provided in the pneumatic valve body, and the automatic circulation operation of the gas-liquid hybrid valve is realized.

Description

Technical Field

[0001] The invention belongs to the field of reversing valves, and in particular relates to a gas-liquid hybrid valve. Background Art

[0002] The reversing valve is a directional control valve with more than two flow forms and more than two oil ports. It is a valve that realizes the communication, cutting and reversing of hydraulic oil flow, as well as pressure unloading and sequential action control. The directional control valve relies on the relative movement of the valve core and the valve body. There are two types: rotary valve type and sliding valve type. At present, the movement of the valve core on the market is mostly electromagnetically controlled. The main disadvantages of using electric control to control the operation of the valve core are that the battery valve needs to be powered on in real time. The battery valve is prone to stop working during power outages, and the battery valve needs to be programmed, which increases the difficulty of production. Summary of the invention

[0003] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a gas-liquid hybrid valve. The gas-liquid hybrid valve has a reasonable structure and simple gas and liquid flow paths, which is convenient for realizing the gas and liquid linkage of the valve body. It does not require an electromagnet to control the operation of the valve core, thereby improving the convenience of the valve body.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A gas-liquid hybrid valve comprises a hybrid valve body and a valve body piston rod, the valve body piston rod is slidably installed in the hybrid valve body, the hybrid valve body comprises a pneumatic valve body and a hydraulic valve body assembly connected to each other, the valve body piston rod comprises a piston rod, a cylinder piston and an oil cylinder piston connected to each other, the oil cylinder piston is slidably installed in the hydraulic valve body assembly, the cylinder piston is slidably installed in the pneumatic valve body, a pneumatic reversing valve is installed on the pneumatic valve body, and correspondingly, a reversing air path is dug in the pneumatic valve body, the reversing air path is connected to the pneumatic reversing valve to control the reversing of the pneumatic reversing valve.

[0006] Furthermore, the reversing air circuit includes a first reversing air circuit and a second reversing air circuit. The two ends of the first reversing air circuit are respectively connected to the pneumatic reversing valve and the inner wall of the cylinder. Similarly, the two ends of the second reversing air circuit are respectively connected to the pneumatic reversing valve and the inner wall of the cylinder.

[0007] Furthermore, the first reversing air circuit and the second reversing air circuit are adapted to the valve body piston rod. When the valve body piston rod moves to the rightmost end, the second reversing air circuit is closed and the first reversing air circuit is connected. When the valve body piston rod moves to the leftmost end, the first reversing air circuit is closed and the second reversing air circuit is connected.

[0008] Furthermore, the hydraulic valve body assembly is fixedly mounted on the pneumatic valve body, a pneumatic passage is dug in the pneumatic valve body, the opening of the pneumatic passage is respectively connected to the pneumatic valve body and the hydraulic valve body assembly, and a liquid flow passage is dug in the hydraulic valve body assembly.

[0009] Furthermore, the hydraulic valve body assembly includes an oil circuit valve body, a first oil cylinder, a second oil cylinder and an oil cylinder bottom cover. The first oil cylinder and the second oil cylinder are respectively fixedly mounted on the two side end surfaces of the oil circuit valve body, the oil cylinder bottom cover is fixedly mounted on the end of the second oil cylinder, and the first oil cylinder is fixedly mounted on the pneumatic valve body.

[0010] Furthermore, a forward oil circuit, a reverse oil circuit, an oil inlet circuit and an oil outlet circuit are dug in the oil circuit valve body. The oil inlet circuit is connected to the forward oil circuit and the reverse oil circuit. Similarly, the oil outlet circuit is connected to the forward oil circuit and the reverse oil circuit. The opening of the forward oil circuit is set toward the second oil cylinder, and the opening of the reverse oil circuit is set toward the first oil cylinder.

[0011] Furthermore, the pneumatic passage includes a forward cylinder air circuit, a forward oil cylinder air circuit, a reverse cylinder air circuit and a reverse oil cylinder air circuit; the forward cylinder air circuit and the reverse cylinder air circuit are connected to the pneumatic valve body; and the forward oil cylinder air circuit and the reverse oil cylinder air circuit are connected to the hydraulic valve body assembly.

[0012] Furthermore, the pneumatic valve body includes a cylinder barrel, a cylinder base and a cylinder cover, the cylinder cover and the cylinder base are respectively fixedly mounted on both ends of the cylinder barrel, and the hydraulic valve body assembly is fixedly mounted on the cylinder base.

[0013] Further, the valve body piston rod includes a piston rod, a cylinder piston and an oil cylinder piston, the cylinder piston and the oil cylinder piston are respectively fixedly connected to the ends of both sides of the piston rod, and the middle of the piston rod is fixedly connected to the oil cylinder piston disc. Further, the oil cylinder piston disc is adapted to the oil cylinder piston, the outer side of the oil cylinder piston disc is sleeved with a piston disc sealing assembly, and the outer side of the oil cylinder piston is sleeved with an oil cylinder sealing assembly.

[0014] The beneficial effect of the present invention is that the pneumatic reversing valve is switched through the reversing air path provided in the pneumatic valve body, thereby realizing the automatic circulation work of the gas-liquid hybrid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the valve body piston rod.

[0016] Figure 2 It is a structural schematic diagram of the gas-liquid hybrid valve.

[0017] Figure 3 This is the AA cross-sectional view of the gas-liquid hybrid valve.

[0018] Figure 4 This is the BB cross-sectional view of the gas-liquid hybrid valve.

[0019] Figure 5 Graph is the perspective view of this gas-liquid hybrid valve.

[0020] Reference numerals: piston rod 1, cylinder piston 2, oil cylinder piston 3, oil cylinder piston disc 4, piston disc sealing assembly 5, oil cylinder sealing assembly 6, piston sealing ring 7, oil cylinder oil seal 8, first installation cavity 9, cylinder piston through hole 11, cylinder screw 12, cylinder piston groove 13, sealing ring installation groove 14, sealing ring 15, cylinder bolt countersunk hole 16, second installation cavity 17, oil cylinder piston through hole 18, oil cylinder bolt 19, oil cylinder bolt countersunk hole 20;

[0021] Forward oil circuit 1-1, reverse oil circuit 1-2, oil inlet oil circuit 1-3, oil outlet oil circuit 1-4, forward oil outlet channel 1-5, first constant flow channel 1-6, liquid inlet check valve 1-7, liquid outlet check valve 1-8, liquid inlet valve chamber 1-9, liquid outlet valve hole 1-10, check valve cover plate 1-11, spring 1-12, plug 1-13, reverse oil outlet channel 1-14, second constant flow channel 1-15, oil cylinder mounting groove 1-16, oil cylinder 1-17, shaft hole 1-18, oil seal 1-19, guide ring 1-20;

[0022] Pneumatic valve body 2-1, hydraulic valve body assembly 2-2, oil circuit valve body 2-3, first oil cylinder 2-4, second oil cylinder 2-5, oil cylinder bottom cover 2-6, forward cylinder air circuit 2-7, forward cylinder air circuit 2-8, reverse cylinder air circuit 2-9, reverse cylinder air circuit 2-10, cylinder barrel 2-11, cylinder base 2-12, cylinder upper cover 2-13, pneumatic reversing valve 2-15, exhaust seat 2-16, air inlet 2-17, oil cylinder mounting hole 2-18, valve core hole 2-19, valve core mounting section 2-20, ventilation section 2-21, air pipe 2-22, first reversing air circuit 2-23, second reversing air circuit 2-24. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] A gas-liquid hybrid valve comprises a hybrid valve body and a valve body piston rod, the valve body piston rod is slidably installed in the hybrid valve body, the hybrid valve body comprises a pneumatic valve body 2-1 and a hydraulic valve body assembly 2-2 which are connected to each other, the valve body piston rod comprises a piston rod 1, a cylinder piston 2 and an oil cylinder piston 3 which are connected to each other, the oil cylinder piston 3 is slidably installed in the hydraulic valve body assembly 2-2, the cylinder piston 2 is slidably installed in the pneumatic valve body 2-1, a pneumatic reversing valve 2-15 is installed on the pneumatic valve body 2-1, and correspondingly, a reversing air path is dug in the pneumatic valve body 2-1, the reversing air path is connected to the pneumatic reversing valve 2-15, the reversing of the pneumatic reversing valve 2-15 is controlled, the pneumatic reversing valve 2-15 is reversed by the reversing air path provided in the pneumatic valve body 2-1, so as to realize the automatic circulation of the gas-liquid hybrid valve.

[0025] The hybrid valve body includes a pneumatic valve body 2-1 and a hydraulic valve body assembly 2-2. The hydraulic valve body assembly 2-2 is fixedly mounted on the pneumatic valve body 2-1. A pneumatic channel is dug inside the pneumatic valve body 2-1. The openings of the pneumatic channel are respectively connected to the pneumatic valve body 2-1 and the hydraulic valve body assembly 2-2. A liquid flow channel is dug inside the hydraulic valve body assembly 2-2. The gas-liquid linkage of the hybrid valve body is realized by setting the pneumatic channel and the liquid flow channel. The structure of the hybrid valve body is reasonable, which is convenient for processing and producing each valve body component. The valve body components are easy to install, thereby improving the production efficiency of the gas-liquid hybrid valve.

[0026] The hydraulic valve body assembly 2-2 includes an oil circuit valve body 2-3, a first oil cylinder 2-4, a second oil cylinder 2-5 and a cylinder bottom cover 2-6. The first oil cylinder 2-4 and the second oil cylinder 2-5 are respectively fixedly mounted on the two side end faces of the oil circuit valve body 2-3, the cylinder bottom cover 2-6 is fixedly mounted on the end of the second oil cylinder 2-5, and the first oil cylinder 2-4 is fixedly mounted on the pneumatic valve body 2-1. Through the setting of the oil circuit valve body 2-3, the oil in and out of the first oil cylinder 2-4 and the second oil cylinder 2-5 are controlled to realize the forward and reverse movement of the valve core.

[0027] The pneumatic channel includes a forward cylinder air circuit 2-7, a forward oil cylinder air circuit 2-8, a reverse cylinder air circuit 2-9 and a reverse oil cylinder air circuit 2-10. The forward cylinder air circuit 2-7 and the reverse cylinder air circuit 2-9 are connected to the pneumatic valve body 2-1, and the movement of the cylinder piston 2 in the pneumatic valve body 2-1 is controlled by the forward cylinder air circuit 2-7 and the reverse cylinder air circuit 2-9. The forward oil cylinder air circuit 2-8 and the reverse oil cylinder air circuit 2-10 are connected to the hydraulic valve body assembly, and the movement of the cylinder piston 3 and the cylinder piston disc 4 in the hydraulic valve body assembly 2-2 is controlled by the forward oil cylinder air circuit 2-8 and the reverse oil cylinder air circuit 2-10.

[0028] The pneumatic valve body 2-1 includes a cylinder barrel 2-11, a cylinder base 2-12 and a cylinder upper cover 2-13. The cylinder upper cover 2-13 and the cylinder base 2-12 are respectively fixedly mounted on the two ends of the cylinder barrel 2-11. The hydraulic valve body assembly 2-2 is fixedly mounted on the cylinder base 2-12. A reversing air path is dug inside the cylinder barrel 2-11.

[0029] A pneumatic reversing valve 2-15 and an exhaust seat 2-16 are installed on the cylinder upper cover 2-13. An air inlet 2-17 is dug inside the cylinder upper cover 2-13. The pneumatic reversing valve 2-14 is connected to the exhaust seat 2-16, the forward cylinder air circuit 2-7, the forward oil cylinder air circuit 2-8, the reverse cylinder air circuit 2-9, the reverse oil cylinder air circuit 2-10, and the air inlet 2-14 to control the direction of the airflow in the valve body.

[0030] A cylinder mounting hole 2-18 is dug on the end face of the cylinder base 2-12, and the hydraulic valve body assembly 2-2 (the first cylinder 2-4) is fixedly connected to the cylinder mounting hole 2-18. A valve core hole 2-19 is dug inside the cylinder base 2-12, and the valve core hole 2-19 is coaxial with the cylinder mounting hole 2-18. The valve body piston rod is movably installed in the valve core hole 2-19.

[0031] The valve core hole 2-19 includes a valve core mounting section 2-20 and a ventilation section 2-21. The ventilation section 2-21 is located between the valve core mounting section 2-20 and the cylinder mounting hole 2-18. The forward cylinder air path 2-8 is connected to the hydraulic valve body assembly 2-2 (the first cylinder 2-4) through the ventilation section 2-21.

[0032] In some preferred embodiments, an air pipe 2-22 is connected between the cylinder base 2-12 and the cylinder bottom cover 2-6 to facilitate the communication between the pneumatic valve body 2-1 and the second cylinder 2-5 to form a reverse cylinder air path 2-10.

[0033] In some preferred embodiments, a first reversing gas path 2-23 and a second reversing gas path 2-24 are dug on the side wall of the cylinder barrel 2-11, and the first reversing gas path 2-23 and the second reversing gas path 2-24 form a reversing gas path. The two ends of the first reversing gas path 2-23 are respectively connected to the pneumatic reversing valve 2-15 and the inner wall of the cylinder barrel 2-11. Similarly, the two ends of the second reversing gas path 2-24 are respectively connected to the pneumatic reversing valve 2-15 and the inner wall of the cylinder barrel 2-11. Preferably, the first reversing gas path 2-23 and the second reversing gas path 2-24 are adapted to the cylinder piston 2. When the cylinder piston 2 moves to the rightmost end, the cylinder piston 2 The plug 2 interferes with the opening of the second reversing air path 2-24, the second reversing air path 2-24 is closed, the first reversing air path 2-23 is connected, and the air pressure switches the pneumatic reversing valve 2-15 through the first reversing air path 2-23; when the cylinder piston 2 moves to the leftmost end, the cylinder piston 2 interferes with the opening of the first reversing air path 2-23, the first reversing air path 2-23 is closed, the second reversing air path 2-24 is connected, and the air pressure switches the pneumatic reversing valve 2-15 through the second reversing air path 2-24, thereby realizing automatic reversing of the pneumatic reversing valve 2-15, reducing the electronic control device, and allowing the valve body to work without power.

[0034] A forward oil circuit 1-1, a reverse oil circuit 1-2, an oil inlet circuit 1-3 and an oil outlet circuit 1-4 are dug in the oil circuit valve body. The oil inlet circuit 1-3 is connected with the forward oil circuit 1-1 and the reverse oil circuit 1-2. Similarly, the oil outlet circuit 1-4 is connected with the forward oil circuit 1-1 and the reverse oil circuit 1-3. The openings of the forward oil circuit 1-1 and the reverse oil circuit 1-2 are respectively facing the two side end surfaces of the oil circuit valve body. Through the setting of the forward oil circuit 1-1 and the reverse oil circuit 1-2, it is convenient to install the oil cylinders at both ends of the oil circuit valve body for liquid inlet and outlet. The structure is simple and the control is stable, so as to realize the movement of the valve core of the oil circuit part in the gas-liquid hybrid valve.

[0035] The forward oil circuit 1-2 includes a forward oil outlet channel 1-5 and a first constant flow channel 1-6. The two ends of the first constant flow channel 1-6 are respectively connected to the oil inlet circuit 1-3 and the oil outlet circuit 1-4. The forward oil outlet channel 1-5 is connected to the middle part of the first constant flow channel 1-6. The oil flows into the second oil cylinder or flows out of the second oil cylinder through the first constant flow channel 1-6.

[0036] An inlet check valve 1-7 and an outlet check valve 1-8 are installed in the first constant flow channel 1-6. The connection position of the forward oil outlet channel 1-5 and the first constant flow channel 1-6 is located between the inlet check valve 1-7 and the outlet check valve 1-8. The inlet check valve 1-7 is used to allow the oil to flow only into the first constant flow channel 1-6, and the outlet check valve 1-8 is used to allow the oil to flow only out of the first constant flow channel 1-6, so that the oil in the oil circuit moves in a directional manner.

[0037] An inlet valve cavity 1-9 and an outlet valve hole 1-10 are dug on the side wall of the oil circuit valve body. The inlet valve cavity 1-9 and the outlet valve hole 1-10 are respectively on the adjacent sides of the oil circuit valve body. The inlet check valve 1-7 is installed in the inlet valve cavity 1-9, and the outlet check valve 1-8 is installed in the outlet valve hole 1-10. The arrangement of the inlet valve cavity 1-9 and the outlet valve hole 1-10 facilitates the installation of the inlet and outlet check valves, thereby improving the assembly efficiency of the oil circuit valve body.

[0038] The liquid inlet one-way valve 1-7 includes a one-way valve cover plate 1-11, a spring 1-12 and a plug 1-13. The plug 1-13 is connected to the one-way valve cover plate 1-11 through the spring 1-12. The one-way valve cover plate 1-11 is covered on the end face of the liquid inlet valve cavity 1-9. The plug 1-13 is against the oil inlet oil circuit 1-3. The plug 1-13 allows the liquid in the first constant flow channel 1-6 to only enter but not exit.

[0039] The liquid outlet one-way valve 1-8 is a threaded plug-in one-way valve, and the liquid outlet one-way valve 1-8 is used to ensure that the liquid in the first constant flow channel 1-6 can only flow out but not enter.

[0040] The reverse oil circuit 1-2 includes a reverse oil outlet channel 1-14 and a second constant flow channel 1-15. The reverse oil outlet channel 1-14 is parallel to the forward oil outlet channel 1-5, and the openings are opposite. The structure of the second constant flow channel 1-15 is consistent with that of the first constant flow channel 1-16, and the same liquid inlet check valve 1-7 and liquid outlet check valve 1-8 are installed in the second constant flow channel 1-15.

[0041] Cylinder mounting grooves 1-16 are dug on both side end faces of the oil circuit valve body. Through the setting of the cylinder mounting grooves 1-16, it is convenient to install the first oil cylinder and the second oil cylinder at both ends of the oil circuit valve body. The forward oil outlet channel 1-5 and the directional oil outlet channel 1-14 are respectively connected to the cylinder mounting grooves 1-16 on the both side end faces, which facilitates the oil to flow into the first oil cylinder and the second oil cylinder to realize the movement of the valve core.

[0042] An axial hole 1-18 is dug at the center position of the oil circuit valve body, and an oil seal 1-19 and a guide ring 1-20 are installed in the axial hole 1-18. Preferably, a set of oil seals 1-19 and guide rings 1-20 are installed in the axial hole 1-18. Preferably, the two guide rings 1-20 are located on the inner sides of the two oil seals 1-19 to prevent the oil in the oil cylinders on both sides of the oil circuit valve body from flowing through.

[0043] The valve body piston rod includes a piston rod 1, a cylinder piston 2 and an oil cylinder piston 3. The cylinder piston 2 and the oil cylinder piston 3 are respectively fixedly connected to the two side ends of the piston rod 1. The middle part of the piston rod 1 is fixedly connected with a cylinder piston disk 4. The cylinder piston 2 is installed in the cylinder. The oil cylinder piston 3 and the cylinder piston disk 4 are installed in the oil cylinder. The cylinder part piston and the oil cylinder part piston are connected through the piston rod 1 to realize gas-liquid linkage, simplify the structure of the hydraulic flow circuit, and reduce the floor space of the hydraulic flow circuit. In addition, the structure of the piston rod is simple, which is convenient for improving the production efficiency of the piston rod and reducing the production cost of the piston rod.

[0044] The cylinder piston disc 4 is matched with the cylinder piston 3. During use, the hydraulic oil in the valve body is located between the cylinder piston disc 4 and the cylinder piston 3. The outer side of the cylinder piston disc 4 is provided with a piston disc sealing assembly 5, and the outer side of the cylinder piston 3 is provided with a cylinder sealing assembly 6. By arranging the piston disc sealing assembly 5 and the cylinder sealing assembly 6, the sealing performance of the hydraulic oil is improved and the control stability of the valve body is improved.

[0045] The piston disc sealing assembly 5 and the cylinder sealing assembly 6 are symmetrically arranged, and both include a piston sealing ring 7 and a cylinder oil seal 8. The piston sealing ring 7 is located on the outside of the cylinder oil seal ring, that is, the two sealing rings 7 are arranged on the outside of the two cylinder oil seals 8. Through the arrangement of the oil seal and the sealing ring, double protection is provided for the sealing performance of the cylinder piston 3 and the cylinder piston disc 4.

[0046] A first mounting cavity 9 is excavated on the end surface of the cylinder piston 2, and the end of the piston rod 1 is detachably fixedly mounted in the first mounting cavity 9. Preferably, the piston rod 1 and the first mounting cavity 9 are transitionally matched. Through the provision of the first mounting cavity 9, on the one hand, it is convenient to improve the installation accuracy of the cylinder piston 2 and the piston rod 1, and on the other hand, it can improve the convenience of installation.

[0047] A cylinder piston through hole 11 is dug inside the cylinder piston 2, and the cylinder piston through hole 11 is connected to the first installation cavity 9. A cylinder screw 12 is installed in the cylinder piston through hole 11. The cylinder piston 2 is detachably installed on the end of the piston rod 1 through the cylinder bolt 12. Through the arrangement of the assembled cylinder piston 2 and the piston rod 1, each component of the valve body piston can be processed separately, reducing the production difficulty of the valve body piston.

[0048] A cylinder piston groove 13 and a sealing ring installation groove 14 are dug on the side wall of the cylinder piston 2. A sealing ring installation groove 14 is dug on both sides of the cylinder piston groove 13. A sealing ring 15 is installed in the sealing ring installation groove 14. The setting of the sealing ring 15 improves the sealing performance of the cylinder piston 2. The setting of the cylinder piston groove 13 facilitates reducing the side wall processing surface of the cylinder piston 2 and reducing the processing difficulty of the cylinder piston 2.

[0049] A cylinder bolt countersink 16 is dug on the end surface of the cylinder piston 2, and the cylinder bolt countersink 16 is connected to the cylinder piston through hole 11. Preferably, the depth of the cylinder bolt countersink 16 is greater than the thickness of the head of the cylinder screw 12, so as to hide the head of the cylinder screw 12.

[0050] A second mounting cavity 17 is excavated on the end surface of the cylinder piston 3, and the end of the piston rod 1 is detachably fixedly mounted in the second mounting cavity 17. Similarly, the setting of the second mounting cavity 17, on the one hand, facilitates improving the installation accuracy of the cylinder piston 3 and the piston rod 1, and on the other hand, can improve the installation convenience.

[0051] A cylinder piston through hole 18 is dug in the cylinder piston 3 , which is communicated with the second mounting cavity 17 . A cylinder bolt 19 is installed in the cylinder piston through hole 18 , and the cylinder piston 3 is detachably mounted on the end of the piston rod 1 via the cylinder bolt 19 .

[0052] A cylinder bolt countersink 20 is dug on the end surface of the cylinder piston 3, and the cylinder bolt countersink 20 is connected to the cylinder piston through hole 18. Preferably, the depth of the cylinder bolt countersink 20 is less than the thickness of the head of the cylinder bolt 19, and the strength of the cylinder piston 3 is improved by reducing the depth of the cylinder bolt countersink 20.

[0053] The valve body of the gas-liquid hybrid valve and the valve body piston rod cooperate to form six cavities A, B, C, D, E, and F. Among them, the cavity A is between the end face of the cylinder piston 2 and the end face of the cylinder cover 2-13, and the positive cylinder gas path 2-7 is connected to the cavity A; the cavity B is between the end face of the cylinder piston 2 and the end face of the cylinder base 2-12, and the reverse cylinder gas path 2-9 is connected to the cavity B; the cavity is formed between the end face of the cylinder base 2-12 and the end face of the oil cylinder piston disc 4 Body C, the forward cylinder gas circuit 2-8 is connected to the cavity C; a cavity D is formed between the end face of the cylinder piston disc 4 and the end face of the oil circuit valve body 2-3, and the reverse oil circuit 1-2 is connected to the cavity D; a cavity E is formed between the end face of the oil circuit valve body 2-3 and the end face of the cylinder piston 3, and the forward oil circuit 1-1 is connected to the cavity E; a cavity F is formed between the end face of the cylinder piston 3 and the end face of the cylinder bottom cover 2-6, and the reverse cylinder gas circuit 2-10 is connected to the cavity F.

[0054] The working principle of this hybrid valve is:

[0055] (1) Compressed air is passed into cavity A and cavity C through the air path;

[0056] (2) Under the action of pressure, chambers A and C expand, driving the piston rod to move to the right;

[0057] (3) When the piston rod moves to the right, the hydraulic oil in chamber D is discharged, hydraulic oil flows into chamber E, and the gas in chamber F is discharged through the gas path;

[0058] (4) When the piston rod moves rightward to the rightmost end, the first reversing air path 2-23 is connected to the pneumatic reversing valve, causing the pneumatic reversing valve to reverse direction;

[0059] (5) After the pneumatic reversing valve is switched, compressed air flows to chamber B and chamber F;

[0060] (6) Under the action of pressure, chambers B and F expand, driving the piston rod to move to the left;

[0061] (7) When the piston rod moves to the left, hydraulic oil flows into cavity D, the hydraulic oil in cavity E is discharged, and the gas in cavity C is discharged through the gas path;

[0062] (8) When the piston rod moves to the left to the leftmost end, the second reversing air path 2-24 is connected to the pneumatic reversing valve, causing the pneumatic reversing valve to reverse;

[0063] (9) Repeat steps (1) to (8).

[0064] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0065] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A gas-liquid hybrid valve, characterized in that: The invention comprises a hybrid valve body and a valve body piston rod, wherein the valve body piston rod is slidably mounted in the hybrid valve body, the hybrid valve body comprises a pneumatic valve body (2-1) and a hydraulic valve body assembly (2-2) which are connected to each other, the valve body piston rod comprises a piston rod (1), a cylinder piston (2) and an oil cylinder piston (3) which are connected to each other, the oil cylinder piston (3) is slidably mounted in the hydraulic valve body assembly (2-2), the cylinder piston (2) is slidably mounted in the pneumatic valve body (2-1), a pneumatic reversing valve (2-15) is mounted on the pneumatic valve body (2-1), and correspondingly, a reversing air path is excavated in the pneumatic valve body (2-1), the reversing air path is connected to the pneumatic reversing valve (2-15), and the reversing of the pneumatic reversing valve (2-15) is controlled; The reversing gas path comprises a first reversing gas path (2-23) and a second reversing gas path (2-24); two ends of the first reversing gas path (2-23) are respectively connected to the pneumatic reversing valve (2-15) and the inner wall of the cylinder barrel (2-11); similarly, two ends of the second reversing gas path (2-24) are respectively connected to the pneumatic reversing valve (2-15) and the inner wall of the cylinder barrel (2-11); The hydraulic valve body assembly (2-2) is fixedly mounted on the pneumatic valve body (2-1), a pneumatic passage is excavated inside the pneumatic valve body (2-1), an opening of the pneumatic passage is respectively connected to the pneumatic valve body (2-1) and the hydraulic valve body assembly (2-2), and a liquid flow passage is excavated inside the hydraulic valve body assembly (2-2); The pneumatic passage comprises a forward cylinder air circuit (2-7), a forward oil cylinder air circuit (2-8), a reverse cylinder air circuit (2-9) and a reverse oil cylinder air circuit (2-10); the forward cylinder air circuit (2-7) and the reverse cylinder air circuit (2-9) are connected to the pneumatic valve body (2-1), and the forward oil cylinder air circuit (2-8) and the reverse oil cylinder air circuit (2-10) are connected to the hydraulic valve body assembly (2-2).

2. A gas-liquid hybrid valve according to claim 1, characterized in that: The first reversing air path (2-23) and the second reversing air path (2-24) are adapted to the valve body piston rod; when the valve body piston rod moves to the rightmost end, the second reversing air path (2-24) is closed and the first reversing air path (2-23) is connected; when the valve body piston rod moves to the leftmost end, the first reversing air path (2-23) is closed and the second reversing air path (2-24) is connected.

3. The gas-liquid hybrid valve according to claim 1, characterized in that: The hydraulic valve body assembly (2-2) comprises an oil circuit valve body (2-3), a first oil cylinder (2-4), a second oil cylinder (2-5) and an oil cylinder bottom cover (2-6); the first oil cylinder (2-4) and the second oil cylinder (2-5) are respectively fixedly mounted on both side end surfaces of the oil circuit valve body (2-3); the oil cylinder bottom cover (2-6) is fixedly mounted on the end of the second oil cylinder (2-5); and the first oil cylinder (2-4) is fixedly mounted on the pneumatic valve body (2-1).

4. The gas-liquid hybrid valve according to claim 3, characterized in that: A forward oil circuit (1-1), a reverse oil circuit (1-2), an oil inlet circuit (1-3) and an oil outlet circuit (1-4) are excavated in the oil circuit valve body. The oil inlet circuit (1-3) is connected to the forward oil circuit (1-1) and the reverse oil circuit (1-2). Similarly, the oil outlet circuit (1-4) is connected to the forward oil circuit (1-1) and the reverse oil circuit (1-2). The opening of the forward oil circuit (1-1) is arranged toward the second oil cylinder, and the opening of the reverse oil circuit (1-2) is arranged toward the first oil cylinder.

5. The gas-liquid hybrid valve according to claim 3, characterized in that: The pneumatic valve body (2-1) comprises a cylinder barrel (2-11), a cylinder base (2-12) and a cylinder upper cover (2-13); the cylinder upper cover (2-13) and the cylinder base (2-12) are respectively fixedly mounted on both ends of the cylinder barrel (2-11); and the hydraulic valve body assembly (2-2) is fixedly mounted on the cylinder base (2-12).

6. The gas-liquid hybrid valve according to claim 1, characterized in that: The valve body piston rod comprises a piston rod (1), a cylinder piston (2) and an oil cylinder piston (3); the cylinder piston (2) and the oil cylinder piston (3) are respectively fixedly connected to the ends of both sides of the piston rod (1); and the middle part of the piston rod (1) is fixedly connected to a cylinder piston disc (4).

7. The gas-liquid hybrid valve according to claim 6, characterized in that: The oil cylinder piston disc (4) is matched with the oil cylinder piston (3); the outer side of the oil cylinder piston disc (4) is provided with a piston disc sealing component, and the outer side of the oil cylinder piston (3) is provided with a oil cylinder sealing component.

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