Pneumatic system

Abstract

The present invention provides a pneumatic system, which includes a balance cylinder, a connecting pipeline, a muffler, and an accumulator having a second air vent. The balance cylinder includes a first air vent; a first pipe orifice of the connecting pipeline is connected to and communicates with the first air vent, and a second pipe orifice of the connecting pipeline communicates with the external environment; both the muffler and the connection position are arranged on the connecting pipeline; the pipe section between the connection position and the first pipe orifice of the connecting pipeline is arranged to be openable and closable; the connection position between the second air vent and the connecting pipeline is arranged to be openable and closable. When the compressed gas in the balance cylinder flows into the connecting pipeline through the first air vent, a part of the compressed gas enters the accumulator through the second air vent and is stored with energy; when the balance cylinder is in a stopped state, the compressed gas stored with energy in the accumulator flows through the second air vent to the muffler to purge the muffler. The pneumatic system of the present application solves the problem of inconvenience in the cleaning method of the muffler in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical automation, and more particularly, to a pneumatic system. Background Art

[0002] The vertical robotic arm of a heavy-duty injection molding robot is usually equipped with a balance cylinder to provide energy assistance for ascending when the robotic arm ascends, thereby reducing the motor load; and to provide resistance for buffering when the robotic arm descends, making the descent smooth.

[0003] During the process of exhausting and inhaling air on the exhaust side of the balance cylinder, the air flow on the exhaust side is extremely large, causing air eddies and air vibrations, and generating strong exhaust noise. To reduce the exhaust noise, a common method is to add a muffler on the exhaust side of the balance cylinder.

[0004] When the balance cylinder exhausts, the extremely large air flow passes through the porous sintered copper beads of the muffler, which will cause the adiabatic expansion temperature to drop, and the moisture contained in the air will freeze on the sintered copper beads to form water droplets. The water droplets have an adsorption effect on fine particles such as dust, and over time, it will cause the pores between the sintered copper beads to become blocked.

[0005] The traditional method for cleaning the muffler is to manually remove the muffler and soak it in organic solvents such as gasoline, and then blow it clean with gas. This method requires maintenance personnel to regularly disassemble the muffler for cleaning, consuming a lot of man-hours, and the installation position of the muffler is relatively high, requiring working at heights, which is not convenient for disassembly and poses a greater safety hazard. Summary of the Invention

[0006] The main object of the present invention is to provide a pneumatic system to solve the problem of inconvenience in the cleaning method of the muffler in the prior art.

[0007] To achieve the above object, the present invention provides a pneumatic system, which includes a balance cylinder, a connecting pipeline, a muffler, and an accumulator having a second air vent. The balance cylinder includes a first air vent; the first pipe orifice of the connecting pipeline is connected to and communicated with the first air vent, and the second pipe orifice of the connecting pipeline is communicated with the external environment, so that the compressed gas in the balance cylinder flows out to the external environment through the first air vent and the connecting pipeline, or the external air flow enters the balance cylinder through the connecting pipeline and the first air vent; the muffler is arranged on the connecting pipeline; a connection position is arranged on the connecting pipeline, the connection position is located on one side of the muffler close to the first pipe orifice of the connecting pipeline, and the pipe section between the connection position and the first pipe orifice of the connecting pipeline is arranged to be openable and closable; the second air vent is arranged to be openable and closable at the connection position of the connecting pipeline; wherein, when the compressed gas in the balance cylinder flows into the connecting pipeline through the first air vent, a part of the compressed gas enters the accumulator through the second air vent and is stored for energy storage; when the balance cylinder is in a stopped state, the compressed gas stored for energy storage in the accumulator flows through the second air vent to the muffler to purge the muffler.

[0008] Further, the balance cylinder has a first operation mode and a second operation mode; when the balance cylinder is in the first operation mode, the pipe section between the connection position and the first pipe orifice of the connecting pipeline is in a connected state, and the second air vent and the connection position are in a connected state, and the compressed gas in the balance cylinder flows into the connecting pipeline through the first air vent; when the balance cylinder is in the second operation mode, the pipe section between the connection position and the first pipe orifice of the connecting pipeline is in a connected state, and the second air vent and the connection position are in a disconnected state, and the external air flow enters the balance cylinder through the connecting pipeline and the first air vent; when the balance cylinder is in a stopped state, the pipe section between the connection position and the first pipe orifice of the connecting pipeline is in a disconnected state, and the second air vent and the connection position are in a connected state, and the compressed gas stored for energy storage in the accumulator flows through the second air vent to the muffler.

[0009] Further, a second control valve is arranged on the pipe section between the connection position and the first pipe orifice of the connecting pipeline to control the open and closed state of the pipe section between the connection position and the first pipe orifice of the connecting pipeline; and / or the second air vent and the connection position are connected and communicated through a connecting pipeline, and a first control valve is arranged on the connecting pipeline to control the open and closed state of the connecting pipeline.

[0010] Further, the balance cylinder includes an output part, and the pneumatic system further includes a lifting device; the output part is connected to the lifting device, so that when the lifting device rises, the output part provides upward assistance to the lifting device; and when the lifting device descends, the output part provides resistance to the lifting device.

[0011] Further, when the lifting device rises, the balance cylinder is in the first operation mode; when the lifting device descends, the balance cylinder is in the second operation mode.

[0012] Further, the balance cylinder includes a compression chamber, a first piston portion, and an air inlet; the first piston portion is disposed in the compression chamber to divide the compression chamber into an independent first chamber and a second chamber; the first chamber is located above the second chamber; the first piston portion is disposed movably in the vertical direction; the first ventilation port is communicated with the first chamber, and the air inlet is communicated with the second chamber; the first piston portion is connected to the output portion.

[0013] Further, the accumulator includes: an energy storage chamber; a second piston portion, the second piston portion is disposed in the energy storage chamber to divide the energy storage chamber into an independent third chamber and a fourth chamber; the second piston portion is disposed movably along the distribution direction of the third chamber and the fourth chamber; the second ventilation port is communicated with the fourth chamber; an elastic member, the elastic member is disposed in the third chamber; the telescopic direction of the elastic member is the same as the distribution direction of the third chamber and the fourth chamber, the first end of the elastic member is connected or abutted against the chamber wall of the third chamber, and the second end of the elastic member is connected or abutted against the second piston portion.

[0014] Further, a first sealing groove is provided on the outer peripheral surface of the second piston portion, and the accumulator further includes a first sealing ring, at least a part of the first sealing ring is disposed in the first sealing groove, and the first sealing ring is disposed between the chamber wall of the energy storage chamber and the outer peripheral wall of the second piston portion.

[0015] Further, the muffler has an air flow channel, the channel wall of the air flow channel has sintered holes, the air flow channel is communicated with the lumen of the communication pipeline, so that the compressed gas stored in the accumulator flows into the air flow channel after passing through the second ventilation port and a part of the communication pipeline, and the gas flowing into the air flow channel purges the channel wall of the air flow channel.

[0016] Further, the lifting device is a robotic arm.

[0017] Applying the technical solution of the present invention, the pneumatic system includes a balance cylinder, a connecting pipeline, a muffler, and an accumulator; the balance cylinder includes a first air vent; the first pipe orifice of the connecting pipeline is connected and communicated with the first air vent, and the second pipe orifice of the connecting pipeline is communicated with the external environment, so that the compressed gas in the balance cylinder flows out to the external environment through the first air vent and the connecting pipeline, or the external air flow enters the balance cylinder through the connecting pipeline and the first air vent; the muffler is arranged on the connecting pipeline; a connection position is arranged on the connecting pipeline, and the connection position is located on one side of the muffler close to the first pipe orifice of the connecting pipeline; the pipe section between the connection position and the first pipe orifice of the connecting pipeline is arranged to be switchable, so that the pipe section between the connection position and the first pipe orifice of the connecting pipeline is in a communicating state or a disconnected state; the accumulator has a second air vent; the second air vent of the accumulator is arranged to be switchable with the connection position of the connecting pipeline, so that the cavity between the second air vent of the accumulator and the connection position of the connecting pipeline is in a communicating state or a disconnected state. Wherein, when the compressed gas in the balance cylinder flows into the connecting pipeline through the first air vent, a part of the compressed gas flowing into the connecting pipeline enters the accumulator through the second air vent and is stored for energy storage, and another part of the compressed gas flowing into the connecting pipeline flows into the external environment from the second pipe orifice of the connecting pipeline; at this time, the second air vent is the air inlet. When the balance cylinder is in a stopped state, the compressed gas stored for energy storage in the accumulator flows to the muffler through the second air vent to purge the muffler; at this time, the second air vent is the air outlet.

[0018] The pneumatic system of the present application can realize the automatic cleaning of the muffler, neither requiring maintenance personnel to regularly disassemble the muffler for cleaning, nor requiring maintenance personnel to perform high-altitude operations to disassemble the muffler, solving the problem of inconvenience in the cleaning method of the muffler in the prior art; and the pneumatic system of the present application makes the cleaning operation of the muffler relatively convenient and simple, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 A system diagram of the pneumatic system according to the present invention is shown; wherein, the balance cylinder of the pneumatic system is in the first operation mode;

[0021] Figure 2 A system diagram of the pneumatic system according to the present invention is shown; wherein, the balance cylinder of the pneumatic system is in the second operation mode;

[0022] Figure 3 A system diagram of the pneumatic system according to the present invention is shown; wherein, the balance cylinder of the pneumatic system is in a stopped state;

[0023] Figure 4 Shows a schematic structural diagram of a balance cylinder of a pneumatic system according to the present invention;

[0024] Figure 5 Shows a schematic structural diagram of an accumulator of a pneumatic system according to the present invention;

[0025] Figure 6 Shows a schematic structural diagram of a muffler of a pneumatic system according to the present invention;

[0026] Figure 7 Shows a schematic arrangement structure diagram of a muffler and a balance cylinder of a pneumatic system according to the present invention.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 10. Balance cylinder; 11. Output part; 12. First air vent; 13. Compression chamber; 131. First chamber; 132. Second chamber; 14. First piston part; 15. Air inlet;

[0029] 20. Connecting pipeline; 201. First pipe section; 202. Second pipe section; 21. Connection position;

[0030] 30. Muffler; 31. Air flow channel; 311. First channel section; 312. Second channel section; 32. Muffler cover; 33. Body part;

[0031] 40. Accumulator; 41. Accumulation chamber; 42. Second piston part; 43. Elastic member; 44. Third chamber; 45. Fourth chamber; 46. Second air vent; 47. First sealing ring; 481. Accumulation cylinder; 482. End cover; 483. Connection part; 49. Sealing member; 491. Second sealing ring;

[0032] 51. First control valve; 52. Second control valve; 53. Connection pipeline; 54. Inlet pipeline. Detailed implementation manners

[0033] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] It should be pointed out that the following detailed description is illustrative and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] The present invention provides a pneumatic system. Please refer to Figures 1 to 7 , the pneumatic system includes a balance cylinder 10, a connecting pipeline 20, a muffler 30, and an accumulator 40; the balance cylinder 10 includes a first air inlet 12; the first pipe orifice of the connecting pipeline 20 is connected to and communicated with the first air inlet 12, and the second pipe orifice of the connecting pipeline 20 is communicated with the external environment, so that the compressed gas in the balance cylinder 10 flows out to the external environment through the first air inlet 12 and the connecting pipeline 20, or the external air flow (i.e., the air flow in the external environment) enters the balance cylinder 10 through the connecting pipeline 20 and the first air inlet 12; the muffler 30 is arranged on the connecting pipeline 20; a connection position 21 is arranged on the connecting pipeline 20, and the connection position 21 is located on the side of the muffler 30 close to the first pipe orifice of the connecting pipeline 20; the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is arranged to be openable and closable, so that the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a connected state or a disconnected state; the accumulator 40 has a second air inlet 46; the second air inlet 46 of the accumulator 40 is arranged to be openable and closable with the connection position 21 of the connecting pipeline 20, so that the lumen between the second air inlet 46 of the accumulator 40 and the connection position 21 of the connecting pipeline 20 is in a connected state or a disconnected state. Wherein, when the compressed gas in the balance cylinder 10 flows into the connecting pipeline 20 through the first air inlet 12, a part of the compressed gas flowing into the connecting pipeline 20 enters the accumulator 40 through the second air inlet 46 and is stored for energy storage, and another part of the compressed gas flowing into the connecting pipeline 20 flows into the external environment from the second pipe orifice of the connecting pipeline 20; at this time, the second air inlet 46 is an air inlet. When the balance cylinder 10 is in a stopped state, the balance cylinder 10 stops operating, and the compressed gas stored for energy storage in the accumulator 40 flows to the muffler 30 through the second air inlet 46 to purge the muffler 30; at this time, the second air inlet 46 is an air outlet.

[0037] It should be noted that when the balance cylinder 10 exhausts air, that is, when the compressed gas in the balance cylinder 10 is discharged from the first vent port 12, the air flow at the first vent port 12 is extremely large, which will cause air vortices and air vibrations, generating strong exhaust noise. In addition, when the balance cylinder 10 inhales air, that is, when the external air flow enters the balance cylinder 10 through the connecting pipeline 20 and the first vent port 12, a large air flow will also generate noise. By providing a muffler 30 on the connecting pipeline 20, the air flow noise can be reduced.

[0038] Specifically, when the balance cylinder 10 is in an operating state, the balance cylinder 10 has a first operating mode and a second operating mode. When the balance cylinder 10 is in the first operating mode, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a communicating state, and the second vent port 46 of the accumulator 40 and the pipe cavity at the connection position 21 of the connecting pipeline 20 are in a communicating state. At this time, the compressed gas in the balance cylinder 10 flows into the connecting pipeline 20 through the first vent port 12. A part of the compressed gas flowing into the connecting pipeline 20 enters the accumulator 40 through the second vent port 46 and is stored as energy, and another part of the compressed gas flowing into the connecting pipeline 20 flows into the external environment from the second pipe orifice of the connecting pipeline 20; at this time, the first vent port 12 is the exhaust port, and the second vent port 46 is the intake port.

[0039] When the balance cylinder 10 is in the second operating mode, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a communicating state, and the second vent port 46 of the accumulator 40 and the pipe cavity at the connection position 21 of the connecting pipeline 20 are in a disconnected state. The external air flow enters the balance cylinder 10 through the connecting pipeline 20 and the first vent port 12; at this time, the first vent port 12 is the intake port.

[0040] When the balance cylinder 10 is in a stopped state, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a disconnected state, and the second vent port 46 of the accumulator 40 and the pipe cavity at the connection position 21 of the connecting pipeline 20 are in a communicating state. The compressed gas stored as energy in the accumulator 40 flows through the second vent port 46 to the muffler 30 to purge the muffler 30, thereby realizing the automatic cleaning of the muffler 30; at this time, the second vent port 46 is the air outlet.

[0041] The pneumatic system of the present application can realize the automatic cleaning of the muffler 30, neither requiring maintenance personnel to regularly disassemble the muffler for cleaning nor requiring maintenance personnel to perform high-altitude operations to disassemble the muffler, solving the problem of inconvenience in the cleaning method of the muffler in the prior art; and the pneumatic system of the present application makes the cleaning operation of the muffler 30 relatively convenient and simple, saving time and effort.

[0042] In addition, the pneumatic system of the present application can store a part of the gas discharged from the balance cylinder 10 in the accumulator 40, and use the gas stored in the accumulator 40 to purge and clean the muffler 30, realizing the reuse of energy and air flow.

[0043] In this embodiment, the connecting pipeline 20 includes a first pipe section 201 and a second pipe section 202. The first pipe orifice of the first pipe section 201 is connected and communicated with the first ventilation port 12, that is, the first pipe orifice of the first pipe section 201 is the first pipe orifice of the connecting pipeline 20; the second pipe orifice of the first pipe section 201 is butt-connected and communicated with the first pipe orifice of the second pipe section 202, and the connection position between the second pipe orifice of the first pipe section 201 and the first pipe orifice of the second pipe section 202 is the connection position on the connecting pipeline 20; the second pipe orifice of the second pipe section 202 is communicated with the external environment, that is, the second pipe orifice of the second pipe section 202 is the second pipe orifice of the connecting pipeline 20.

[0044] Specifically, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is the first pipe section 201, and the pipe section between the connection position 21 and the second pipe orifice of the connecting pipeline 20 is the second pipe section 202.

[0045] In this embodiment, a second control valve 52 is provided on the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 to control the on-off state of the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 through the second control valve 52.

[0046] Specifically, when the second control valve 52 is in the open state, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a connected state; when the second control valve 52 is in the closed state, the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a disconnected state.

[0047] Specifically, the second control valve 52 is a solenoid valve.

[0048] In this embodiment, a connecting pipeline 53 is provided between the second ventilation port 46 of the accumulator 40 and the connection position 21 to connect and communicate the second ventilation port 46 of the accumulator 40 and the connection position 21 through the connecting pipeline 53. That is, one pipe orifice of the connecting pipeline 53 is connected and communicated with the second ventilation port 46 of the accumulator 40; the other pipe orifice of the connecting pipeline 53 is connected to the connection position 21 of the connecting pipeline 20, so that the other pipe orifice of the connecting pipeline 53 is communicated with the pipe cavity at the connection position 21 of the connecting pipeline 20.

[0049] Specifically, a first control valve 51 is provided on the connecting pipeline 53 to control the on-off state of the connecting pipeline 53 through the first control valve 51, and further control the on-off state between the second ventilation port 46 of the accumulator 40 and the pipe cavity at the connection position 21 of the connecting pipeline 20.

[0050] Further, when the first control valve 51 is in the open state, the connecting pipeline 53 is in the communicating state. At this time, there is a communicating state between the second vent port 46 of the accumulator 40 and the lumen at the connection position 21 of the communicating pipeline 20. When the first control valve 51 is in the closed state, the connecting pipeline 53 is in the disconnected state. At this time, there is a disconnected state between the second vent port 46 of the accumulator 40 and the lumen at the connection position 21 of the communicating pipeline 20.

[0051] Specifically, the first control valve 51 is a solenoid valve.

[0052] In this embodiment, the balance cylinder 10 includes an output part 11, and the pneumatic system further includes a lifting device; the output part 11 is connected to the lifting device so that when the lifting device rises, the output part 11 provides upward assistance to the lifting device; and when the lifting device descends, the output part 11 provides resistance to the lifting device.

[0053] Specifically, the lifting device is the robotic arm of a robot. Optionally, the robot is an injection molding robot. Further, when the robot moves horizontally, the balance cylinder 10 is in a stopped state.

[0054] It should be noted that the lifting device mainly obtains the upward driving force through a motor; when the lifting device rises, the output part 11 provides upward assistance to the lifting device to reduce the load on the motor. When the lifting device descends, due to the large self-weight of the lifting device, in order to enable the lifting device to descend smoothly, by making the output part 11 provide upward resistance to the lifting device, it plays a buffering role in the descending action of the lifting device, so that the descent of the lifting device becomes relatively smooth.

[0055] During the specific implementation process, during the descent of the lifting device, when the lifting device starts to descend, the motor provides a downward driving force to the lifting device; when the lifting device has descended for a period of time, the motor provides an upward resistance to the lifting device to play a buffering role in the descending action of the lifting device.

[0056] Optionally, the motor is a servo motor.

[0057] Specifically, when the lifting device rises, the balance cylinder 10 is in the first operation mode; when the lifting device descends, the balance cylinder 10 is in the second operation mode.

[0058] Specifically, as Figure 4As shown in the figure, the balance cylinder 10 includes a compression chamber 13, a first piston portion 14, and an air inlet 15; the first piston portion 14 is disposed in the compression chamber 13 to divide the compression chamber 13 into two independent chambers, which are a first chamber 131 and a second chamber 132 respectively; the first chamber 131 and the second chamber 132 are vertically distributed up and down, and the first chamber 131 is located above the second chamber 132; the first piston portion 14 is movably disposed in the vertical direction; the first ventilation port 12 is communicated with the first chamber 131, and the air inlet 15 is communicated with the second chamber 132; the first piston portion 14 is connected to the output portion 11.

[0059] During the specific implementation process, gas is introduced into the second chamber 132 through the air inlet 15. As the amount of gas in the second chamber 132 gradually increases, the air pressure in the second chamber 132 gradually increases; when the air pressure in the second chamber 132 is greater than the air pressure in the first chamber 131, it will push the first piston portion 14 to move upward in the vertical direction, and the first piston portion 14 drives the output portion 11 to move upward. At this time, the output portion 11 provides an upward force to the lifting device.

[0060] Furthermore, when the lifting device rises, the balance cylinder 10 is in the first operating mode, that is, at this time, the second control valve 52 is in the open state and the first control valve 51 is in the open state. The compressed gas in the first chamber 131 flows into the communication pipeline 20 through the first ventilation port 12. A part of the compressed gas flowing into the communication pipeline 20 enters the accumulator 40 through the second ventilation port 46 and is stored for energy storage, and another part of the compressed gas flowing into the communication pipeline 20 flows out from the second pipe orifice of the communication pipeline 20 into the external environment. That is, when the lifting device rises, the compressed gas in the first chamber 131 flows outwards, and gas is continuously introduced into the second chamber 132 through the air inlet 15, so the air pressure in the second chamber 132 must be greater than the air pressure in the first chamber 131.

[0061] Furthermore, when the lifting device descends, the balance cylinder 10 is in the second operating mode, that is, at this time, the second control valve 52 is in the open state and the first control valve 51 is in the closed state. The external air flow enters the first chamber 131 through the communication pipeline 20 and the first ventilation port 12; however, since gas is continuously introduced into the second chamber 132 through the air inlet 15, the air pressure in the second chamber 132 is still greater than the air pressure in the first chamber 131 at this time. However, the upward force provided by the output portion 11 to the lifting device when the lifting device rises is greater than the upward force provided by the output portion 11 to the lifting device when the lifting device descends.

[0062] In this embodiment, as Figure 5As shown, the accumulator 40 includes an energy storage chamber 41, a second piston portion 42, and an elastic member 43; the second piston portion 42 is disposed in the energy storage chamber 41 to divide the energy storage chamber 41 into two independent chambers, which are the third chamber 44 and the fourth chamber 45 respectively; the second piston portion 42 is movably disposed along the distribution direction of the third chamber 44 and the fourth chamber 45; the second vent port 46 communicates with the fourth chamber 45. The elastic member 43 is disposed in the third chamber 44, and the telescopic direction of the elastic member 43 is the same as the distribution direction of the third chamber 44 and the fourth chamber 45; along the telescopic direction of the elastic member 43, the elastic member 43 has a first end and a second end; the first end of the elastic member 43 is connected or abutted against the chamber wall of the third chamber 44, and the second end of the elastic member 43 is connected or abutted against the second piston portion 42.

[0063] During the specific implementation process, when a part of the compressed gas enters the fourth chamber 45 through the second vent port 46, the air pressure in the fourth chamber 45 gradually increases, and the second piston portion 42 is pushed to move in the direction from the fourth chamber 45 to the third chamber 44, and the elastic member 43 is compressed to convert the air pressure energy into elastic potential energy; that is, a part of the compressed gas enters the accumulator 40 and is stored. When the balance cylinder 10 is in a stopped state and the pipe section between the connection position 21 and the first pipe orifice of the communication pipeline 20 is in a disconnected state, and the second vent port 46 and the pipe cavity at the connection position 21 of the communication pipeline 20 are in a connected state, the compressed elastic member 43 is released, and the second piston portion 42 is pushed to move in the direction from the third chamber 44 to the fourth chamber 45 to convert the elastic potential energy into air pressure energy, and the compressed air in the fourth chamber 45 flows through the second vent port 46 to the muffler 30 to purge the muffler 30; at this time, the second control valve 52 is in a closed state and the first control valve 51 is in an open state.

[0064] Specifically, the elastic member 43 is a spring.

[0065] Optionally, the third chamber 44 and the fourth chamber 45 are vertically distributed up and down, and the third chamber 44 is located above the fourth chamber 45.

[0066] Specifically, a first sealing groove is provided on the outer peripheral surface of the second piston portion 42. The accumulator 40 further includes a first sealing ring 47, at least a part of the first sealing ring 47 is disposed in the first sealing groove, and the first sealing ring 47 is disposed between the wall of the energy storage chamber 41 and the outer peripheral wall of the second piston portion 42 to ensure the mutual independence of the third chamber 44 and the fourth chamber 45. Wherein, the extending direction of the central axis of the first sealing ring 47 is parallel or the same as the distribution direction of the third chamber 44 and the fourth chamber 45; the outer peripheral surface of the second piston portion 42 is disposed around a preset axis, and the extending direction of the preset axis is parallel or the same as the distribution direction of the third chamber 44 and the fourth chamber 45. Optionally, the first sealing groove is an annular structure disposed around the preset axis.

[0067] Specifically, the accumulator 40 includes an energy storage cylinder 481 and an end cap 482; along the axial direction of the energy storage cylinder 481, the first end of the energy storage cylinder 481 is open, and the end cap 482 is covered on the first port of the energy storage cylinder 481; the second end of the energy storage cylinder 481 is closed, and the second vent port 46 is opened at the second end of the energy storage cylinder 481; the cylinder cavity of the energy storage cylinder 481 forms the energy storage chamber 41.

[0068] Further, the accumulator 40 further includes a plugging member 49 and a connecting portion 483 fixedly disposed in the energy storage cylinder 481. A second mounting hole is provided on the connecting portion 483, and a first mounting hole is provided on the end cap 482; the first mounting hole and the second mounting hole are butt-connected and communicated to form a mounting hole portion; the plugging member 49 is inserted into the mounting hole portion to plug the mounting hole portion, thereby ensuring the sealing performance inside the energy storage cylinder 481.

[0069] Further, the first end of the elastic member 43 is connected or abutted against the connecting portion 483.

[0070] Further, the connecting portion 483 is fixedly connected to the inner wall of the energy storage cylinder 481.

[0071] Further, the accumulator 40 further includes a second sealing ring 491. A second sealing groove is provided on the outer wall of the plugging member 49, at least a part of the second sealing ring 491 is disposed in the second sealing groove, and the second sealing ring 491 is disposed between the wall of the mounting hole portion and the outer wall of the plugging member 49 to ensure the sealing performance of the third chamber 44.

[0072] In this embodiment, the muffler 30 has an air flow channel 31, and sintered holes are provided on the channel wall of the air flow channel 31; the air flow channel 31 is communicated with the lumen of the communication pipeline 20, so that the compressed gas stored in the accumulator 40 flows into the air flow channel 31 after passing through the second vent port 46 and a part of the pipe section of the communication pipeline 20. The gas flowing into the air flow channel 31 purges the channel wall of the air flow channel 31 to blow off the impurities in the sintered holes on the channel wall of the air flow channel 31, thereby realizing the automatic cleaning of the muffler 30.

[0073] Specifically, the air flow channel 31 communicates with the lumen of the second pipe section 202, so that the compressed gas stored in the accumulator 40 flows into the air flow channel 31 after passing through the second vent 46 and the second pipe section 202. The gas flowing into the air flow channel 31 purges the channel wall of the air flow channel 31.

[0074] Specifically, as Figure 6 shown, the muffler 30 includes a muffler cover 32 and a body portion 33; the air flow channel 31 includes a first channel section 311 and a second channel section 312 that communicate with each other. The first channel section 311 is provided on the muffler cover 32, and the second channel section 312 is provided on the body portion 33; the channel wall of the first channel section 311 has sintered holes.

[0075] It should be noted that the muffler cover 32 is made of sintered particles, and sintered holes are formed between the sintered particles, so that the muffler cover 32 is a porous structure, and thus the channel wall of the first channel section 311 has sintered holes. When air with a large air flow passes through the porous sintered particles, heat is generated by the friction of the air flow, and the pressure energy of the gas is converted into heat energy, so as to achieve the purpose of reducing the air flow noise. Optionally, the sintered particles of the muffler cover 32 are sintered copper bead particles.

[0076] When air with a large air flow passes through the porous sintered copper beads, the adiabatic expansion temperature will drop, and the moisture contained in the air will freeze on the sintered copper beads to form water droplets. The water droplets have an adsorption effect on fine particles such as dust, and over time, the pores (i.e., sintered holes) between the sintered copper beads will be blocked. In the specific implementation process, when the balance cylinder 10 is in the first operation mode, a part of the compressed gas enters the accumulator 40 through the second vent 46 and is stored. After the balance cylinder 10 operates in the first operation mode and when the balance cylinder 10 is in a stopped state, the compressed gas stored in the accumulator 40 (i.e., the compressed air in the fourth chamber 45) flows into the air flow channel 31 after passing through the second vent 46 and the second pipe section 202. The gas flowing into the air flow channel 31 purges the channel wall of the air flow channel 31, that is, purges the channel wall of the first channel section 311, that is, purges the sintered particles of the muffler cover 32, and then blows off the blockage in the pores (i.e., sintered holes) between the sintered copper beads, thereby realizing the automatic cleaning of the muffler 30.

[0077] In this embodiment, the first way of arranging the muffler 30 on the connecting pipe 20 is: the first port of the air flow channel 31 is connected and communicated with the second pipe orifice of the connecting pipe 20, and the second port of the air flow channel 31 is communicated with the external environment, so that the second pipe orifice of the connecting pipe 20 is communicated with the external environment through the air flow channel 31; that is, at this time, the muffler 30 is arranged at the end of the connecting pipe 20.

[0078] In this embodiment, the second way of arranging the muffler 30 on the connecting pipeline 20 is as follows: The second pipe segment 202 includes a third pipe segment and a fourth pipe segment. The first pipe orifice of the third pipe segment is the first pipe orifice of the second pipe segment 202. The second pipe orifice of the third pipe segment is connected and communicated with the first port of the air flow channel 31. The second port of the air flow channel 31 is connected and communicated with the first pipe orifice of the fourth pipe segment. The second pipe orifice of the fourth pipe segment is the second pipe orifice of the second pipe segment 202; that is, at this time, the muffler 30 is arranged at the middle position of the second pipe segment 202.

[0079] In this embodiment, the first port of the first channel segment 311 and the second port of the second channel segment 312 are connected and communicated; the second port of the first channel segment 311 is the second port of the air flow channel 31, and the first port of the second channel segment 312 is the first port of the air flow channel 31; or, the second port of the first channel segment 311 is the first port of the air flow channel 31, and the first port of the second channel segment 312 is the second port of the air flow channel 31.

[0080] In this embodiment, the pneumatic system further includes an air inlet pipeline 54. One pipe orifice of the air inlet pipeline 54 is connected and communicated with the air inlet 15 to introduce gas into the second chamber 132 through the air inlet pipeline 54. Optionally, the pressure of the gas introduced into the second chamber 132 through the air inlet pipeline 54 is adjustable.

[0081] In this embodiment, there are multiple pneumatic systems. Figure 7 The mufflers 30 and the balance cylinders 10 of two pneumatic systems are shown.

[0082] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0083] In the pneumatic system provided by the present invention, the pneumatic system includes a balance cylinder 10, a connecting pipeline 20, a muffler 30, and an accumulator 40; the balance cylinder 10 includes a first air vent 12; the first pipe orifice of the connecting pipeline 20 is connected to and communicates with the first air vent 12, and the second pipe orifice of the connecting pipeline 20 communicates with the external environment, so that the compressed gas in the balance cylinder 10 flows out to the external environment through the first air vent 12 and the connecting pipeline 20, or the external air flow enters the balance cylinder 10 through the connecting pipeline 20 and the first air vent 12; the muffler 30 is arranged on the connecting pipeline 20; a connection position 21 is arranged on the connecting pipeline 20, and the connection position 21 is located on the side of the muffler 30 close to the first pipe orifice of the connecting pipeline 20; the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is arranged to be switchable, so that the pipe section between the connection position 21 and the first pipe orifice of the connecting pipeline 20 is in a communicating state or a disconnected state; the accumulator 40 has a second air vent 46; the second air vent 46 of the accumulator 40 is arranged to be switchable with the connection position 21 of the connecting pipeline 20, so that the cavity between the second air vent 46 of the accumulator 40 and the connection position 21 of the connecting pipeline 20 is in a communicating state or a disconnected state. Wherein, when the compressed gas in the balance cylinder 10 flows into the connecting pipeline 20 through the first air vent 12, a part of the compressed gas flowing into the connecting pipeline 20 enters the accumulator 40 through the second air vent 46 and is stored with energy, and another part of the compressed gas flowing into the connecting pipeline 20 flows into the external environment from the second pipe orifice of the connecting pipeline 20; at this time, the second air vent 46 is an air inlet. When the balance cylinder 10 is in a stopped state, the compressed gas stored with energy in the accumulator 40 flows through the second air vent 46 to the muffler 30 to purge the muffler 30; at this time, the second air vent 46 is an air outlet.

[0084] The pneumatic system of the present application can realize the automatic cleaning of the muffler 30, neither requiring maintenance personnel to regularly disassemble the muffler for cleaning, nor requiring maintenance personnel to perform high-altitude operations to disassemble the muffler, solving the problem of inconvenience in the cleaning method of the muffler in the prior art; and the pneumatic system of the present application makes the cleaning operation of the muffler 30 relatively convenient and simple, saving time and effort.

[0085] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0086] For the sake of convenience in description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" and the like can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0087] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pneumatic system, comprising a balance cylinder (10), a connecting pipeline (20) and a muffler (30), wherein the balance cylinder (10) includes a first air vent (12); a first pipe orifice of the connecting pipeline (20) is connected and communicated with the first air vent (12), and a second pipe orifice of the connecting pipeline (20) is communicated with the external environment, so that the compressed gas in the balance cylinder (10) flows out to the external environment through the first air vent (12) and the connecting pipeline (20), or the external air flow enters the balance cylinder (10) through the connecting pipeline (20) and the first air vent (12); the muffler (30) is arranged on the connecting pipeline (20); and it is characterized in that A connection position (21) is provided on the connecting pipeline (20), and the connection position (21) is located on one side of the muffler (30) close to the first pipe orifice of the connecting pipeline (20). The pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20) is provided in a switchable-on-and-off manner. The pneumatic system further includes an accumulator (40) having a second ventilation port (46), and the second ventilation port (46) is provided in a switchable-on-and-off manner at the connection position (21) of the connecting pipeline (20). Wherein, when the compressed gas in the balance cylinder (10) flows into the connecting pipeline (20) through the first ventilation port (12), a part of the compressed gas enters the accumulator (40) through the second ventilation port (46) and is stored with energy. When the balance cylinder (10) is in a stopped state, the compressed gas stored with energy in the accumulator (40) flows to the muffler (30) through the second ventilation port (46) to purge the muffler (30).

2. The pneumatic system according to claim 1, characterized in that The balance cylinder (10) has a first operation mode and a second operation mode. When the balance cylinder (10) is in the first operation mode, the pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20) is in a connected state, the second ventilation port (46) and the connection position (21) are in a connected state, and the compressed gas in the balance cylinder (10) flows into the connecting pipeline (20) through the first ventilation port (12). When the balance cylinder (10) is in the second operation mode, the pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20) is in a connected state, the second ventilation port (46) and the connection position (21) are in a disconnected state, and the outside air flow enters the balance cylinder (10) through the connecting pipeline (20) and the first ventilation port (12). When the balance cylinder (10) is in a stopped state, the pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20) is in a disconnected state, the second ventilation port (46) and the connection position (21) are in a connected state, and the compressed gas stored with energy in the accumulator (40) flows to the muffler (30) through the second ventilation port (46).

3. The pneumatic system according to claim 1 or 2, characterized in that A second control valve (52) is provided on the pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20) to control the on-off state of the pipe section between the connection position (21) and the first pipe orifice of the connecting pipeline (20). And / or The second ventilation port (46) and the connection position (21) are connected and communicated through a connecting pipeline (53), and a first control valve (51) is provided on the connecting pipeline (53) to control the on-off state of the connecting pipeline (53).

4. The pneumatic system according to claim 2, characterized in that The balance cylinder (10) includes an output part (11), and the pneumatic system further includes a lifting device; the output part (11) is connected to the lifting device so that when the lifting device rises, the output part (11) provides upward assistance to the lifting device; and when the lifting device descends, the output part (11) provides resistance to the lifting device.

5. The pneumatic system according to claim 4, characterized in that When the lifting device rises, the balance cylinder (10) is in the first operating mode; when the lifting device descends, the balance cylinder (10) is in the second operating mode.

6. The pneumatic system according to claim 4 or 5, characterized in that The balance cylinder (10) includes a compression chamber (13), a first piston part (14), and an air inlet (15); the first piston part (14) is arranged in the compression chamber (13) to divide the compression chamber (13) into independent first and second chambers (131, 132); the first chamber (131) is located above the second chamber (132); the first piston part (14) is arranged to be movable in the vertical direction; the first vent (12) communicates with the first chamber (131), and the air inlet (15) communicates with the second chamber (132); the first piston part (14) is connected to the output part (11).

7. The pneumatic system according to claim 1, characterized in that The accumulator (40) includes: An energy storage chamber (41); A second piston part (42) arranged in the energy storage chamber (41) to divide the energy storage chamber (41) into independent third and fourth chambers (44, 45); the second piston part (42) is arranged to be movable along the distribution direction of the third and fourth chambers (44, 45); the second vent (46) communicates with the fourth chamber (45); An elastic member (43) arranged in the third chamber (44); the telescopic direction of the elastic member (43) is the same as the distribution direction of the third and fourth chambers (44, 45), the first end of the elastic member (43) is connected or abutted against the chamber wall of the third chamber (44), and the second end of the elastic member (43) is connected or abutted against the second piston part (42).

8. The pneumatic system according to claim 7, characterized in that A first sealing groove is provided on the outer peripheral surface of the second piston part (42), and the accumulator (40) further includes a first sealing ring (47), at least part of the first sealing ring (47) is arranged in the first sealing groove, and the first sealing ring (47) is arranged between the chamber wall of the energy storage chamber (41) and the outer peripheral wall of the second piston part (42).

9. The pneumatic system according to claim 1, characterized in that The muffler (30) has an air flow channel (31), the channel wall of the air flow channel (31) has sintered holes, and the air flow channel (31) communicates with the lumen of the communication pipeline (20), so that the compressed gas stored in the accumulator (40) flows into the air flow channel (31) after passing through the second ventilation port (46) and a partial pipe section of the communication pipeline (20), and the gas flowing into the air flow channel (31) purges the channel wall of the air flow channel (31).

10. The pneumatic system according to claim 4, characterized in that The lifting device is a robotic arm.

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