Exhaust device, air compressor and air suspension system

Abstract

The utility model discloses an exhaust device, an air compressor and an air suspension system, the exhaust device is installed on an air tank of the compressor, the exhaust device comprises a valve seat, a mechanical valve and an electromagnetic valve, the mechanical valve comprises a valve cover, a main valve body, a plug connected to the lower end portion of the main valve body and used for opening or closing the valve cover, and an elastic piece installed between the main valve body and the valve cover, the main valve body comprises an upper valve plate and a lower valve rod. The electromagnetic valve and the mechanical valve are used in cooperation, so that the functions of the safety valve and active exhaust are achieved, when the mechanical valve is at high pressure, the mechanical valve serves as the safety valve, and when the mechanical valve is at low pressure, the electromagnetic valve serves as a pilot valve and is actively opened, the mechanical valve is opened, the active exhaust function is achieved, and the overall size and energy consumption of the exhaust device are greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of air spring accessories, and in particular relates to an exhaust device, an air compressor and an air suspension system. Background Art

[0002] At present, air compressors generally use mechanical valves or solenoid valves for exhaust. However, a simple mechanical valve can only be used as a safety valve and cannot actively exhaust. A simple solenoid valve used as an exhaust valve has a small aperture and a very slow exhaust speed. A large aperture requires a particularly large spring force, and the corresponding solenoid valve volume and current will become larger, resulting in a larger overall volume and energy consumption of the exhaust device. Summary of the Invention

[0003] The purpose of the utility model is to provide an exhaust device which can actively exhaust air at a high exhaust speed.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: an exhaust device, which is installed on the gas tank of the compressor, comprising:

[0005] A valve seat, provided with a first installation cavity and a second installation cavity, wherein the first installation cavity includes, from bottom to top, a main hole, a main chamber, a main chamber, and a main chamber. The main hole is connected to the gas tank and has a diameter smaller than that of the main chamber. The diameter of the main chamber is smaller than that of the main chamber. The diameter of the main chamber is equal to that of the main chamber.

[0006] a mechanical valve installed in the first installation cavity, comprising a valve cover with a sealing cover arranged on the upper port of the main three chambers, a main valve body arranged in the main two chambers and the main three chambers, a plug connected to the lower end of the main valve body and used to open or cover the main one hole, an elastic member installed between the main valve body and the valve cover and allowing the main valve body to always have a tendency to move toward the main one hole, the main valve body comprising an upper valve plate and a lower valve stem, the main three chambers being formed between the upper valve plate and the valve cover, the lower valve stem being sealingly arranged in the main one chamber, the main one chamber being connected to the atmosphere, a first air path connecting the main one chamber and the main three chambers being opened on the main valve body;

[0007] The solenoid valve is installed in the second installation cavity. A second gas path connecting the main second chamber and the solenoid valve is provided on the valve seat. The second gas path has at least two states: open and closed. When the solenoid valve is in the closed state, the second gas path is connected to the atmosphere through the solenoid valve. When the solenoid valve is in the open state, the second gas path is connected to the gas tank through the solenoid valve. When the air compressor is working, if the gas tank pressure value is lower than the safety threshold of the mechanical valve and the mechanical valve needs to be opened for exhaust, the solenoid valve needs to be opened. The high-pressure gas in the gas tank enters the main second chamber through the second gas path. Since the contact area between the main valve body and the gas in the main second chamber is much larger than the contact area between the plug and the gas, According to the formula F=PS, the pressure can overcome the spring pressure, and the main valve body is pushed upward by the high-pressure gas. At this time, the plug is separated from the main hole, and the high-pressure gas in the gas tank passes through the main hole and enters the main chamber. At the same time, due to the upward movement of the main valve body, the gas in the main three chambers is compressed and enters the main chamber through the first gas path. The gas in the gas tank is discharged into the atmosphere through the main chamber. After the exhaust is completed, the solenoid valve is closed, and the second gas path is connected to the atmosphere through the solenoid valve. Under the action of the spring force, the gas in the main second chamber is discharged into the atmosphere through the second gas path and the solenoid valve. The main valve body moves downward again under the action of the spring force, and the plug and the main hole are re-sealed.

[0008] In another embodiment, the solenoid valve includes an auxiliary valve body and a control part for controlling the action of the auxiliary valve body; a secondary chamber 1 is formed between the lower end of the auxiliary valve body and the bottom of the second mounting cavity; the secondary chamber 1 is connected to the gas tank through a connecting hole on the auxiliary valve body; a secondary hole 1, a secondary hole 2 and a secondary hole 3 are formed on the auxiliary valve body; the secondary hole 1 is connected to the gas tank, the secondary hole 3 is connected to the atmosphere, and the second gas path connects the main chamber 2 and the secondary hole 2; when the solenoid valve is in a closed state, the second gas path is connected to the atmosphere through the secondary hole 2 and the secondary hole 3; when the solenoid valve is in an open state, the second gas path is connected to the gas tank through the secondary hole 1 and the secondary hole 2.

[0009] In another embodiment, the second installation cavity includes, from bottom to top, a connecting hole, a sub-chamber 1, and a sub-chamber 2, the sub-hole 1 being connected to the gas tank through the connecting hole, the sub-chamber 1 being connected to the connecting hole and having a diameter larger than the sub-hole 1, the sub-chamber 2 being connected to the sub-chamber 1 and having a diameter larger than the sub-chamber 1, the sub-valve body being arranged in the sub-chamber 1, and the control unit being arranged in the sub-chamber 2.

[0010] In another embodiment, one port of the first gas path is on the upper end of the main valve body, and the other port is the main second hole, which is on the side wall of the lower valve stem and communicates with the main first chamber.

[0011] In another embodiment, limiting grooves are respectively provided on the upper end surface of the upper valve plate and the lower end surface of the valve cover, the upper end of the spring is passed through the limiting groove of the lower end surface of the valve cover, and the lower end of the spring is passed through the limiting groove of the upper end surface of the upper valve plate.

[0012] In another embodiment, a first sealing ring is provided on the fitting surface between the valve cover and the valve seat.

[0013] In another embodiment, a second sealing ring is provided on the fitting surface between the upper valve plate and the valve seat, a third sealing ring is provided on the fitting surface between the lower valve stem and the valve seat, and the third sealing ring is located above the second main hole.

[0014] In another embodiment, a manual pressure relief valve is provided on the connecting hole. When the manual pressure relief valve is removed, the gas tank is directly connected to the atmosphere through the connecting hole.

[0015] The utility model also provides an air compressor, which includes a gas tank, an exhaust device installed on the gas tank and a piston assembly, and a motor driving the piston assembly to pump air into the gas tank, and the exhaust device is the above-mentioned exhaust device.

[0016] The utility model also provides an air suspension system, which includes an air bag and an air compressor for filling the air bag, and the air compressor is the above-mentioned air compressor.

[0017] The beneficial effect of the present invention is that the solenoid valve is used in conjunction with the mechanical valve to realize the functions of a safety valve and active exhaust. When the air pressure of the mechanical valve is high, the mechanical valve is used as a safety valve. When the air pressure is low, the solenoid valve is used as a pilot valve and is actively opened, thereby opening the mechanical valve to realize the active exhaust function, which greatly reduces the overall volume and energy consumption of the exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a top view of the exhaust device in the present utility model;

[0019] Figure 2 for Figure 1 Sectional view AA;

[0020] Figure 3 This is a top view of the exhaust device in the present utility model;

[0021] Figure 4 for Figure 3 Cross-sectional view BB. DETAILED DESCRIPTION

[0022] The following is a detailed description of the present invention in conjunction with the embodiments shown in the accompanying drawings:

[0023] The air suspension system includes an air bag, an air compressor for filling the air bag, an air compressor including an air tank, an exhaust device mounted on the air tank, a piston assembly, and a motor that drives the piston assembly to pump air into the air tank. Since the air tank, air bag, piston assembly, and motor are all existing technologies, they will not be described in detail here. Figure 2As shown in / 4, the exhaust device is installed on the gas tank of the compressor, and it includes: a valve seat 1, a mechanical valve 2 and a solenoid valve 3.

[0024] The valve seat 1 is provided with a first installation cavity 11 and a second installation cavity 12. The first installation cavity 11 includes, from bottom to top, a main hole 13, a main chamber 14, a main chamber 2 15 and a main chamber 3 16. The main hole 13 is connected to the gas tank and its diameter is smaller than that of the main chamber 14. The diameter of the main chamber 14 is smaller than that of the main chamber 2 15. The diameter of the main chamber 2 15 is equal to the diameter of the main chamber 3 16.

[0025] The mechanical valve 2 is installed in the first installation cavity 11, which includes a valve cover 21 with a sealing cover arranged on the upper port of the main three chambers 16, a main valve body 22 arranged in the main second chamber 15 and the main third chamber 16, a plug 23 connected to the lower end of the main valve body 22 and used to open or cover the main first hole 13, an elastic member 24 installed between the main valve body 22 and the valve cover 21 and making the main valve body 22 always have a tendency to move toward the main first hole 13, the elastic member 24 is a spring, the main valve body 22 includes an upper valve plate 25 and a lower valve stem 26, the main three chambers 16 are formed between the upper valve plate 25 and the valve cover 21, the upper end of the lower valve stem 26 is sealed and penetrated in the main first chamber 14, the main first chamber 14 is connected to the atmosphere, a first air path 27 connecting the main first chamber 14 and the main third chamber 16 is opened on the main valve body 22, and a second air path 17 connecting the main second chamber 15 and the solenoid valve 3 is provided on the valve seat 1. One port of an air path 27 is on the upper end portion of the main valve body 22, and the other port is the main second hole 28. The diameter of the lower end portion of the lower valve stem 26 is smaller than the diameter of the main first chamber 14, thereby forming a gap so that the main second hole 28 can communicate with the main first chamber 14. The main second hole 28 is on the side wall of the lower valve stem 26 and is communicated with the main first chamber 14. A limiting groove 20 is respectively provided on the upper end surface of the upper valve plate 25 and the lower end surface of the valve cover 21. The upper end portion of the spring is inserted into the limiting groove 20 on the lower end surface of the valve cover 21, and the lower end portion of the spring is inserted into the limiting groove 20 on the upper end surface of the upper valve plate 25; a first sealing ring 211 is provided on the fitting surface between the valve cover 21 and the valve seat 1; a second sealing ring 212 is provided on the fitting surface between the upper valve plate 25 and the valve seat 1; a third sealing ring 213 is provided on the fitting surface between the lower valve stem 26 and the valve seat 1, and the third sealing ring 213 is located above the main second hole 28.

[0026] The solenoid valve 3 is a three-position, two-way valve, which is installed in the second installation cavity 12. It has at least two states: open and closed. When the solenoid valve 3 is in the closed state, the second gas path 17 is connected to the atmosphere through the solenoid valve 3. When the solenoid valve 3 is in the open state, the second gas path 17 is connected to the gas tank 0 through the solenoid valve 3. Specifically, the solenoid valve 3 includes a secondary valve body 31 and a control unit 32 that controls the operation of the secondary valve body 31. A secondary first chamber 33 is formed between the lower end of the secondary valve body 31 and the bottom of the second mounting chamber 12. The secondary first chamber 33 is connected to the gas tank 0 through a connecting hole 34 on the secondary valve body 31. The secondary valve body 31 is formed with a secondary first hole 35, a secondary second hole 36, and a secondary third hole 37. The secondary first hole 35 is connected to the gas tank 0 through the connecting hole 34, and the secondary third hole 37 is connected to the atmosphere. The second gas path 17 connects the main second chamber 15 and the secondary second hole 36. When the solenoid valve 3 is closed, the second gas path 17 is connected to the atmosphere through the secondary second hole 36 and the secondary third hole 37. When the solenoid valve 3 is open, the second gas path 17 is connected to the gas tank 0 through the secondary first hole 35 and the secondary second hole 36. A manual pressure relief valve 4 is provided on the connecting hole 34. When the manual pressure relief valve 4 is removed, the gas tank 0 is directly connected to the atmosphere through the connecting hole 34.

[0027] The second installation cavity 12 includes, from bottom to top, a connecting hole 34, a subsidiary first chamber 33, and a subsidiary second chamber 36. The subsidiary first hole 35 is connected to the gas tank 0 through the connecting hole 34. The subsidiary first chamber 33 is connected to the connecting hole 34 and has a larger diameter than the subsidiary first hole 35. The subsidiary second chamber 36 is connected to the subsidiary first chamber 33 and has a larger diameter than the subsidiary first chamber 33. The subsidiary valve body 31 is arranged in the subsidiary first chamber 33, and the control part 32 is arranged in the subsidiary second chamber 36.

[0028] The principle of the present invention is as follows: when the air compressor is working, the main hole 13 and the auxiliary hole 35 are connected to the gas tank 0. At this time, if the pressure value of the gas tank 0 is lower than the safety threshold of the mechanical valve 2, and the mechanical valve 2 is to be opened for exhaust, the solenoid valve 3 needs to be opened, and the auxiliary hole 35 and the auxiliary second hole 36 are connected. The high-pressure gas in the gas tank 0 passes through the auxiliary hole 35 and the auxiliary second hole 36 and enters the main second chamber 15 through the second gas path 17. Since the contact area between the main valve body 22 and the gas in the main second chamber 15 is much larger than the contact area between the plug 23 and the gas, according to the formula F=PS, the pressure can overcome the spring pressure, and the main valve body 22 is pushed upward by the high-pressure gas. At this time, the plug 23 is separated from the main hole 13, and the gas tank The high-pressure gas in 0 passes through the main hole 13 and enters the main chamber 14. At the same time, due to the upward movement of the main valve body 22, the gas in the main three chambers 16 is compressed and enters the main chamber 14 through the first gas path 27 and the main second hole 28. The main chamber 14 has a gas path connected to the atmosphere. The gas in the gas tank 0 is discharged into the atmosphere through the main chamber 14. After the exhaust is completed, the solenoid valve 3 is closed, the auxiliary hole 15 35 and the auxiliary second hole 36 are closed, and the auxiliary second hole 36 and the auxiliary third hole 37 are connected. Under the action of the spring force, the gas in the main chamber 15 is discharged into the atmosphere through the second gas path 17, the auxiliary second hole 36, and the auxiliary third hole 37. The main valve body 22 moves down again under the action of the spring force, and the plug 23 is re-sealed with the main hole 13.

[0029] The embodiments described above are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. An exhaust device, which is installed on the gas tank of a compressor, characterized in that: It includes: A valve seat, provided with a first installation cavity and a second installation cavity, wherein the first installation cavity includes, from bottom to top, a main hole, a main chamber, a main chamber, and a main chamber. The main hole is connected to the gas tank and has a diameter smaller than that of the main chamber. The diameter of the main chamber is smaller than that of the main chamber. The diameter of the main chamber is equal to that of the main chamber. a mechanical valve installed in the first installation cavity, comprising a valve cover with a sealing cover arranged on the upper port of the main three chambers, a main valve body arranged in the main two chambers and the main three chambers, a plug connected to the lower end of the main valve body and used to open or cover the main one hole, an elastic member installed between the main valve body and the valve cover and allowing the main valve body to always have a tendency to move toward the main one hole, the main valve body comprising an upper valve plate and a lower valve stem, the main three chambers being formed between the upper valve plate and the valve cover, the lower valve stem being sealingly arranged in the main one chamber, the main one chamber being connected to the atmosphere, a first air path connecting the main one chamber and the main three chambers being opened on the main valve body; The solenoid valve is installed in the second installation cavity, and a second air path connecting the main second chamber and the solenoid valve is provided on the valve seat. The second air path has at least two states, open and closed. When the solenoid valve is in the closed state, the second air path is connected to the atmosphere through the solenoid valve. When the solenoid valve is in the open state, the second air path is connected to the gas tank through the solenoid valve.

2. The exhaust device according to claim 1, characterized in that: The solenoid valve includes a secondary valve body and a control part that controls the action of the secondary valve body. A secondary chamber 1 is formed between the lower end of the secondary valve body and the bottom of the second mounting cavity. The secondary chamber 1 is connected to the gas tank through a connecting hole on the secondary valve body. A secondary hole 1, a secondary hole 2 and a secondary hole 3 are formed on the secondary valve body. The secondary hole 1 is connected to the gas tank, the secondary hole 3 is connected to the atmosphere, and the second gas path connects the main chamber 2 and the secondary hole 2. When the solenoid valve is in a closed state, the second gas path is connected to the atmosphere through the secondary hole 2 and the secondary hole 3. When the solenoid valve is in an open state, the second gas path is connected to the gas tank through the secondary hole 1 and the secondary hole 2.

3. The exhaust device according to claim 2, characterized in that: The second installation cavity includes, from bottom to top, a connecting hole, a sub-chamber 1, and a sub-chamber 2. The sub-chamber 1 is connected to the gas tank through the connecting hole. The sub-chamber 1 is connected to the connecting hole and has a diameter larger than the sub-chamber 1. The sub-chamber 2 is connected to the sub-chamber 1 and has a diameter larger than the sub-chamber 1. The sub-valve body is arranged in the sub-chamber 1, and the control part is arranged in the sub-chamber 2.

4. The exhaust device according to claim 1, characterized in that: One port of the first gas path is on the upper end portion of the main valve body, and the other port is a main second hole. The main second hole is on the side wall of the lower valve stem and communicates with the main first chamber.

5. The exhaust device according to claim 1, characterized in that: Limiting grooves are respectively provided on the upper end surface of the upper valve plate and the lower end surface of the valve cover. The upper end of the spring is inserted into the limiting groove of the lower end surface of the valve cover, and the lower end of the spring is inserted into the limiting groove of the upper end surface of the upper valve plate.

6. The exhaust device according to claim 1, characterized in that: A first sealing ring is provided on the fitting surface between the valve cover and the valve seat.

7. The exhaust device according to claim 1, characterized in that: A second sealing ring is provided on the fitting surface between the upper valve plate and the valve seat; a third sealing ring is provided on the fitting surface between the lower valve stem and the valve seat.

8. The exhaust device according to claim 1, characterized in that: A manual pressure relief valve is provided on the connecting hole. When the manual pressure relief valve is removed, the gas tank is directly connected to the atmosphere through the connecting hole.

9. An air compressor comprising a gas tank, an exhaust device mounted on the gas tank, a piston assembly, and a motor driving the piston assembly to pump gas into the gas tank, characterized in that: The exhaust device is the exhaust device according to any one of claims 1 to 8.

10. An air suspension system comprising an air bag and an air compressor for inflating the air bag, characterized in that: The air compressor is the air compressor described in claim 9.

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