CN108278247B - Pneumatic driving device and air supply system thereof - Google Patents

Pneumatic driving device and air supply system thereof Download PDF

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Publication number
CN108278247B
CN108278247B CN201810256976.3A CN201810256976A CN108278247B CN 108278247 B CN108278247 B CN 108278247B CN 201810256976 A CN201810256976 A CN 201810256976A CN 108278247 B CN108278247 B CN 108278247B
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China
Prior art keywords
air
filter
liquid
port
air supply
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CN201810256976.3A
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Chinese (zh)
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CN108278247A (en
Inventor
李�浩
王浩
郭静
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Maccura Medical Electronics Co Ltd
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Maccura Medical Electronics Co Ltd
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Priority to CN201810256976.3A priority Critical patent/CN108278247B/en
Publication of CN108278247A publication Critical patent/CN108278247A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/005—Filling or draining of fluid systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0012—In-line filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/266—Drying gases or vapours by filtration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention discloses an air pressure driving device and an air supply system thereof, wherein the air supply system comprises: a gas source having a first port and a second port; the air supply pipeline is provided with an air outlet and an air inlet communicated with the first port, a plurality of air supply filters are connected in series between the air inlet and the air outlet of the air supply pipeline, and the air supply filters comprise at least one moisture filter. The gas entering the gas supply pipeline is discharged after sequentially passing through a plurality of gas supply filters connected in series, and then enters the pneumatic driving piece. Because the plurality of air supply filters comprise at least one moisture filter, the air flows through the moisture filters and dehumidifies at the same time, so that the moisture entering the pneumatic driving parts is greatly reduced, and the probability of rusting, lubricant failure and mechanical gripper blocking of the pneumatic driving parts such as a small cylinder and an air pump in the use process is further reduced.

Description

Pneumatic driving device and air supply system thereof
Technical Field
The invention relates to the technical field of pneumatic driving, in particular to pneumatic driving equipment and a pneumatic system thereof.
Background
In recent years, pneumatic drive devices tend to be miniaturized, such as air cylinders, air pumps, and the like. However, the technical staff find that the lubricant failure condition of the small-sized air cylinder, the air pump and other parts often occurs in the use process and the clamping condition often occurs in the process of driving the mechanical gripper, and the smooth action of the air cylinder is prevented or even the air cylinder is failed in severe cases.
Disclosure of Invention
In view of the foregoing, a first object of the present invention is to provide an air supply system, which is configured to effectively solve the problems that the pneumatic driving device often fails in lubricant and the mechanical gripper is jammed. A second object of the present invention is to provide a pneumatic drive apparatus comprising the above-described air supply system.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An air supply system capable of supplying air to a pneumatic drive of a mechanical gripper, comprising:
A gas source having a first port and a second port;
The air supply pipeline is provided with an air outlet and an air inlet communicated with the first port, a plurality of air supply filters are connected in series between the air inlet and the air outlet of the air supply pipeline, and the air supply filters comprise at least one moisture filter.
Preferably, in the air supply system, the plurality of air supply filters include a first moisture filter, an oil filter, and a second moisture filter.
Preferably, in the air supply system, at least one of the first moisture filter, the oil filter and the second moisture filter is a liquid filter, the liquid filter has a first flow port, a second flow port, a filter element and a filtering drain, the air is sequentially discharged through one of the first flow port and the second flow port, the filter element, the other of the first flow port and the second flow port, and the liquid in the liquid filter can be discharged through the filtering drain.
Preferably, in the above air supply system, the liquid filter includes a bottle cap and a bottle body capable of being connected with the bottle cap in a sealing manner, and the filtering drain port is located on the bottle body;
A first channel and a second channel are arranged in the bottle cap, the first end of the first channel is the first circulation port, the first end of the second channel is the second circulation port, and the second end of the first channel and the second end of the second channel are respectively blocked by two connecting positions of the filter element;
The distance between any connecting position and the filtering liquid draining port is larger than the minimum distance between the filter element and the filtering liquid draining port.
Preferably, in the air supply system, the air supply pipeline is further connected with a spiral pipe in series, and an overflow valve for pressure relief and/or a pressure measuring piece for measuring the air pressure in the air supply pipeline are arranged on the air supply pipeline.
Preferably, in the above air supply system, the air supply system further comprises an air suction pipeline, the air suction pipeline is provided with an air inlet and an air outlet communicated with the second port, and an air suction filter, a pressure reducing valve and/or a pressure measuring part for measuring the air pressure in the air suction pipeline are connected between the air inlet and the air outlet of the air suction pipeline.
Preferably, in the air supply system, the air suction pipeline is further connected in series with a buffer bottle with an air inlet, an air outlet, a liquid inlet and a liquid outlet;
the air supply filters at least comprise liquid filters, the air suction filters are negative pressure liquid filters, and the liquid filters and the negative pressure liquid filters are provided with filtering liquid discharge ports;
The air supply system further comprises a reservoir, the liquid filter and the filtering liquid outlet of the negative pressure liquid filter are communicated with the reservoir, and the liquid outlet of the reservoir is communicated with the liquid inlet of the buffer bottle.
Preferably, in the air supply system, a control member is disposed at a filtering drain port of the negative pressure liquid filter, and when the negative pressure is applied in the air suction pipeline, the control member closes the filtering drain port of the negative pressure liquid filter; when the suction pipeline is in a non-negative pressure state, the control piece opens the filtering liquid outlet of the negative pressure liquid filter.
Preferably, in the above air supply system, the control member includes a membrane and a drain cover fixedly connected with the position of the filtering drain hole, a drain hole is formed in the drain cover, a guide gap is formed between an inner wall of the drain cover and the filtering drain hole, and the membrane is located in the guide gap and can slide along the guide gap to block or open the filtering drain hole.
A pneumatic drive apparatus comprising a gas supply system as claimed in any one of the preceding claims and a pneumatic drive.
Preferably, in the pneumatic driving device, the pneumatic driving member includes a piston and two pneumatic chambers separated by the piston, and the pneumatic driving device further includes a vent buffer communicated with a vent of the pneumatic chambers.
Preferably, in the air pressure driving device, the exhaust buffer comprises a housing with an air inlet and an air outlet, the air inlet of the housing is communicated with the air outlet of the air pressure cavity, and the interior of the housing is hollow to form a buffer cavity.
Preferably, in the air pressure driving device, one end of the air inlet hole of the housing is a conical hole, and the other end of the air inlet hole of the air exhaust buffer is an air inlet hole of the air exhaust buffer, the air exhaust buffer further comprises an adjusting rod with one end being conical, and the opening of the air inlet hole of the housing is adjusted by changing the distance that the conical end of the adjusting rod stretches into the conical hole.
When the air supply system provided by the embodiment is used for supplying air to the pneumatic driving piece, the air entering the air supply pipeline is sequentially discharged after passing through the plurality of air supply filters connected in series, and then enters the pneumatic driving piece. Because the plurality of air supply filters comprise at least one moisture filter, the air flows through the moisture filters and dehumidifies at the same time, so that the moisture entering the pneumatic driving piece is greatly reduced, and the probability of rust, lubricant failure and mechanical gripper blocking caused by fog in the use process of the pneumatic driving piece such as a small-sized air cylinder and an air pump is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow path diagram of an air pressure driving device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a liquid filter according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a liquid filter provided in an embodiment of the present invention;
FIG. 4 is a partial cross-sectional view of a negative pressure liquid filter provided by an embodiment of the present invention;
FIG. 5 is a partial exploded view of a negative pressure liquid filter provided by an embodiment of the present invention;
FIG. 6 is a schematic view of a portion of a negative pressure liquid filter according to an embodiment of the present invention in a non-negative pressure state;
FIG. 7 is a schematic view of a portion of a negative pressure liquid filter according to an embodiment of the present invention in a negative pressure state;
FIG. 8 is a schematic diagram of an exhaust buffer according to an embodiment of the present invention;
FIG. 9 is a cross-sectional view of an exhaust buffer provided by an embodiment of the present invention;
fig. 10 is a schematic diagram of a mechanical gripper for gripping an object to be held according to an embodiment of the present invention.
In fig. 1-10:
1-air source, 2-spiral tube, 3-overflow valve, 4-pressure sensor, 5-liquid filter, 6-oil filter, 7-second moisture filter, 8-exhaust buffer, 8 a-shell, 8 b-buffer cavity, air outlet of 8 c-exhaust buffer, 8 d-adjusting rod, 8d 1-conical end, 8 e-lock nut, 8 f-sound absorbing cotton, air inlet of 8 g-exhaust buffer, 9-reversing valve, 10-pneumatic driving piece, 10 a-pneumatic cavity, 10 b-piston, 11-pressure reducing valve, 12-negative pressure liquid filter, 13-electromagnetic valve, 14-buffer bottle, 15-reservoir;
a 0-bottle cap, b 0-bottle body, b 01-limit surface, c 0-filtering liquid outlet, d 0-first channel, e 0-second channel, f 0-filter element, g 0-sealing ring, h 0-diaphragm, i 0-liquid leakage cover, i 01-liquid leakage hole and i 02-boss;
a 1-cylinder, a 2-clamping jaw and a 3-object to be clamped.
Detailed Description
As described in the foregoing background art, in the prior art, the lubricant failure and other situations often occur in the use process of the small-sized air cylinder, the air pump and other parts, and the smooth action of the air cylinder can be prevented and even the mechanical gripper driven by the air cylinder can be blocked when serious. The inventor finds that the interior of a driving cylinder of most of the blocked mechanical grippers is rusted in the research process, and the thought and test prove that the rusting of the interior of the driving part can cause lubricant failure and the blocking of the mechanical grippers. Further, the inventors have searched for the cause of rust inside the cylinder, and finally found that two cases may cause rust of parts such as the cylinder, the air pump, etc.: one of them is that when the volume of the cylinder or the air pump is smaller than the volume of the pipe to a certain extent, the compressed air expands when exhausted, the temperature is reduced, and when the temperature is lower than the dew point temperature, fog is formed, and because the volume of the cylinder or the air pump is small or the pipe length is long, etc., the fog gradually aggregates into water drops, and dew is formed in the cylinder or the air pump, thereby further rusting is caused; the other is a piston type or other high-power air source device, when the compressed air is compressed, the temperature of the compressed air is increased, the high-temperature air is condensed into liquid water when encountering cold air in the pipeline transmission, and the liquid water is accumulated in the pipeline to influence the gas transmission or enters a pneumatic driving piece to cause rust.
In view of the above, the inventors have tried to dehumidify the pneumatic driver 10 by drying it after removing it, but the process of removing and installing is complicated, and the removal and drying only dehumidifies the pneumatic driver 10 temporarily, and it is impossible to secure a small humidity in the pneumatic driver 10 for a long period of time. The inventors have analyzed that a relatively low humidity in the pneumatic drive 10 can be ensured over a long period of time only by dehumidifying the gas supplied to the pneumatic drive 10 during use.
The following description of the technical solutions according to the embodiments of the present invention will be given with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flow path schematic diagram of a pneumatic driving device according to an embodiment of the invention. The pneumatic driving piece 10 is mainly used for driving the mechanical gripper to act, and the air supply system comprises an air source 1 and an air supply pipeline. The mechanical gripper can achieve the function of grabbing and putting down the grabber, and the structure of the mechanical gripper is that of the prior art. The air source 1 may be an air pump, and the air source 1 may be a double-head pump. The air source 1 is provided with a first port and a second port, wherein the first port is an air outlet of the air source 1, and the second port is an air inlet of the air source 1. The second port of the air source 1 may be directly communicated with the atmosphere, or the second port of the air source 1 may be communicated with the atmosphere through an air suction pipe.
The air supply line has an air inlet and an air outlet, wherein the air inlet of the air supply line is in communication with the first port of the air source 1 and the air outlet of the air supply line is in communication with the air inlet of the pneumatic driver 10, so that the air discharged from the air source 1 is finally supplied to the pneumatic driver 10 via the air supply line.
The key point is that a plurality of air supply filters are connected in series between the air inlet and the air outlet of the air supply pipeline, namely, the air entering through the air inlet of the air supply pipeline sequentially flows through the plurality of air supply filters and then is discharged from the air outlet of the air supply pipeline, and then enters the pneumatic driving piece 10. The plurality of air supply filters includes at least one moisture filter. Such that the gas flows through the moisture filter while dehumidification is performed so that less water vapor enters the pneumatic drive 10.
When the air supply system provided by the embodiment is used for supplying air to the pneumatic driving piece 10, the air entering the air supply pipeline is sequentially discharged after passing through a plurality of air supply filters connected in series, and then enters the pneumatic driving piece 10. Because the plurality of air supply filters comprise at least one moisture filter, the air flows through the moisture filters and dehumidifies at the same time, so that the moisture entering the pneumatic driving piece 10 is greatly reduced, and the probability of rust, lubricant failure and mechanical gripper blocking of the pneumatic driving piece 10 such as a small cylinder and an air pump in the using process is further reduced.
In the above embodiment, the plurality of air supply filters may be all moisture filters. Or may include both a moisture filter and an oil filter 6 in the plurality of supply air filters. Of course, other types of filters than the moisture filter and the oil filter 6 may be included in the plurality of supply air filters, which is not limited herein.
The number of the water filter and the number of the oil filters 6 included in the plurality of air supply filters can be set by themselves according to the actual situation. The arrangement positions and the arrangement sequence of the plurality of air supply filters can be set according to actual conditions.
The pneumatic drive 10 may also be used to drive other mechanical components other than a mechanical gripper, not limited herein.
In one embodiment of the present invention, the plurality of supply air filters includes a first moisture filter, an oil filter 6, and a second moisture filter 7. Wherein the structure of the first moisture filter and the structure of the second moisture filter 7 may be identical. Alternatively, the structure of the first moisture filter may be different from the structure of the second moisture filter 7, for example, the structure of the first moisture filter includes a filtering drain c0, and the second moisture filter 7 is provided with a permeable filter element and no drain, which is not limited herein.
In the above embodiment, preferably, the first moisture filter, the oil filter 6 and the second moisture filter 7 may be arranged in order in the direction of the gas flow, i.e., the gas in the gas supply line passes through the first moisture filter, then the oil filter 6, and finally the second moisture filter 7.
As shown in fig. 2 to 3, the plurality of gas supply filters includes a liquid filter 5, and the liquid filter 5 has a first flow port, a second flow port, a filter element f0, and a filter drain c0, and the gas is sequentially discharged through one of the first flow port and the second flow port, the filter element f0, the other of the first flow port and the second flow port. The liquid filter 5 communicates with the outside through the first flow port and the second flow port, and the filter element f0 is located inside the liquid filter 5. The liquid in the liquid filter 5 can be discharged through the drain port c 0.
When the liquid filter 5 is used, gas enters the liquid filter 5 through one of the first flow port and the second flow port, flows through the filter element f0 in the liquid filter 5, and the gas flowing through the filter element f0 is discharged out of the liquid filter 5 through the other of the first flow port and the second flow port. The liquid such as moisture in the gas is absorbed by the filter element f0 to achieve the aim of dehumidification. The key point is that the liquid absorbed by the filter element f0 can be discharged out of the liquid filter 5 through the liquid filtering and discharging port c0, so that the arrangement can avoid that the liquid in the liquid filter 5 affects the dehumidification performance of the liquid filter more, the service life of the liquid filter 5 is greatly prolonged, and the frequent replacement of the liquid filter 5 is also avoided.
It should be noted that, during normal use of the liquid filter 5, gas enters the liquid filter 5 through one of the first flow port and the second flow port, gas exits the liquid filter 5 through the other of the first flow port and the second flow port, and the filter element f0 is disposed lower than the other of the first flow port and the second flow port, that is, the filter element f0 is disposed entirely lower than the other of the first flow port and the second flow port, so as to prevent the liquid filtered by the filter element f0 from being discharged from the other of the first flow port and the second flow port.
Specifically, the first flow port is an air inlet, the second flow port is an air outlet, and in the normal use process of the liquid filter 5, the filter element f0 should be integrally lower than the second flow port, i.e. any position of the filter element f0 is lower than the second flow port, so that the liquid filtered by the filter element f0 can be prevented from being discharged from the second flow port.
Similarly, in the normal use process of the liquid filter 5, the filtering drain port c0 is lower than the filter core f0, so that the liquid absorbed by the filter core f0 gradually descends due to the gravity, and finally can be drained through the filtering drain port c 0.
The filter element f0 in the liquid filter 5 may filter moisture, oil dirt, and/or impurities, and may be specifically set to an appropriate filter element f0 according to actual conditions. The material, thickness and shape of the membrane h0 are determined according to practical situations.
The liquid filter 5 in this embodiment includes a bottle cap a0 and a bottle body b0, and the bottle cap a0 and the bottle body b0 can be sealingly connected together.
The bottle cap a0 and the bottle body b0 can be fixedly connected together through screws, and a sealing ring g0 is arranged between the bottle cap a0 and the bottle body b 0. The sealing groove can be formed in the bottle body b0 or the bottle cap a0, the sealing groove is used for accommodating and installing the sealing ring g0, and after the bottle cap a0 is connected with the bottle body b0 through a screw, the sealing ring g0 is tightly pressed by the bottle cap a0 and the bottle body b0 to play a sealing role.
Of course, the bottle cap a0 and the bottle body b0 can be provided with threads, and the bottle cap a0 and the bottle body b0 are connected through threads; or the bottle cap a0 and the bottle body b0 can be clamped, and the invention is not limited in this regard.
The filtering drain port c0 can be located on the bottle b0, and when the liquid filter 5 is used normally, the bottle b0 is located at the lower side of the bottle cap a0, the filtering drain port c0 is located at the lower side of the filter element f0, and liquid absorbed by the filter element f0 flows into the bottle b0 due to the action of gravity and is finally discharged through the filtering drain port c 0.
Preferably, the liquid filter 5 is normally used, and the filter drain c0 is located at the lowest position of the bottle b 0. The bottom of the bottle b0 may be an arc wall, and the filtering drain c0 is located at the lowest position of the arc wall, so that the liquid can flow to the filtering drain c0 along the arc wall, and then the liquid filter 5 is discharged.
Further, a first channel d0 and a second channel e0 are arranged in the bottle cap a0, the first end of the first channel d0 is a first flow port, the first end of the second channel e0 is a second flow port, namely one of the first channel d0 and the second channel e0 is an air inlet channel, and the other of the first channel d0 and the second channel e0 is an air outlet channel. The second end of the first channel d0 and the second end of the second channel e0 are blocked by two connecting positions of the filter element f0 respectively. So set up, when first passageway d0 is the inlet channel, and second passageway e0 is the outlet channel, gas gets into first passageway d0 through first flow port to get into filter core f0 through the second end of first passageway d0, get into second passageway e0 through the second end of second passageway e0 after flowing through filter core f0, finally flow out liquid filter 5 through the second flow port, and it can be seen from above, gas discharges liquid filter 5 through first passageway d0, filter core f0 and second passageway e0 in proper order.
The second end of the first channel d0 and the second end of the second channel e0 are respectively blocked by two connection positions of the filter element f0, which means that no gap exists between the filter element f0 and the second end of the first channel d0 and between the filter element f0 and the second end of the second channel e0, and the filter element f0 is directly contacted with the second end of the first channel d0 and the second end of the second channel e 0.
Of course, the first channel d0 and the second channel e0 may not be provided in the liquid filter 5, and the filter element f0 may directly block the first flow port and the second flow port, that is, the gas directly enters the filter element f0 through the first flow port, flows through the filter element f0, and then directly exits the liquid filter 5 through the second flow port.
In the above embodiment, the distance between any one of the connection positions and the filter drain port c0 is larger than the minimum distance between the filter element f0 and the filter drain port c 0. The minimum distance of the filter element f0 from the filter drain port c0 means the distance from the filter drain port c0 at the position of the filter element f0 closest to the filter drain port c 0. By this arrangement, the liquid absorbed by the filter element f0 can be prevented from entering the first passage d0 or the second passage e0 through the connection position.
During normal use of the liquid filter 5, the first channel d0 and the second channel e0 are both arranged at a position higher than the lowest position of the filter element f0, so as to prevent liquid absorbed by the filter element f0 from entering the first channel d0 or the second channel e0.
In another embodiment, to facilitate replacement of filter cartridge f0, filter cartridge f0 is removably coupled to bottle cap a0 or bottle b 0. That is, the filter element f0 can be detachably connected with the bottle cap a0, or the filter element f0 can be detachably connected with the bottle body b 0.
Specifically, the filter element f0 and the bottle cap a0 can be connected through threads, and the filter element f0 can be screwed on the bottle cap a 0. Of course, the filter element f0 may be screwed to the bottle b 0. Or the filter element f0 and the bottle cap a0 may be clamped, and the filter element f0 and the bottle body b0 may be clamped, which is not limited herein.
In addition, the liquid in the liquid filter 5 is discharged through the liquid filtering and discharging port c0, so that the liquid absorbed by the filter element f0 can be discharged out of the liquid filter 5 through the liquid filtering and discharging port c0, and the phenomenon that the moisture accumulated in the filter element f0 for a long time and the self dehumidifying capacity is reduced can be avoided.
The structure of the first moisture filter and/or the second moisture filter 7 may be the same as that of the liquid filter 5, and of course, the structure of the oil filter 6 may be the same as that of the liquid filter 5, which is not limited herein.
For further removal of impurities, a spiral pipe 2 may also be connected in series to the gas supply line, in particular the spiral pipe 2 being connected in series between the first port of the gas source 1 and the first moisture filter. I.e. the gas discharged from the first port of the gas source 1, enters the spiral pipe 2, is discharged from the spiral pipe 2 and then enters the first moisture filter. The inventor tests that the spiral tube 2 has the functions of cooling, dehumidifying and filtering, when the compressed high-temperature and high-humidity gas discharged from the gas source 1 passes through the spiral tube 2, the stay time in the spiral tube 2 is longer, and the gas in the spiral tube 2 exchanges heat with the external environment, so that the compressed gas in the spiral tube 2 is cooled, the moisture in the gas is condensed into water, the high-temperature and high-humidity gas is changed into low-temperature bottom-humidity gas, and the dehumidification of the gas is realized. In addition, when the gas flows through the spiral pipe 2, the centrifugal force acts on the gas to throw part of grease and impurities in the gas to the wall of the spiral pipe 2, so that the gas is separated from part of impurities and greasy dirt.
The gas supply pipeline can be further connected with an overflow valve 3 in series, and the overflow valve 3 can discharge redundant gas on the premise of keeping the gas pressure in the gas supply pipeline stable. The flow of the air source 1 needs to reach a certain size to meet the air pressure requirement of the pneumatic driving piece 10, the air flow required by the pneumatic driving piece 10 is often far smaller than the air flow generated by the air source 1, if redundant air is not discharged in time, the air pressure in the system can reach a peak value under the continuous operation of the air source 1, the air source 1 can work at full load, the service life of the air source 1 is reduced, the pneumatic driving piece 10 can also work under high air pressure, the service life of the pneumatic driving piece 10 is reduced, an overflow valve 3 can be connected in series on an air supply pipeline, and after the air pressure in the air supply pipeline reaches the pressure value set by the overflow valve 3, the overflow valve 3 discharges redundant part of compressed air to keep the air pressure in the pipeline constant.
In addition, a pressure measuring member for measuring the air pressure in the air supply line may be further provided on the air supply line, and the pressure measuring member may be specifically the pressure sensor 4.
Specifically, one end of the pipeline TI is communicated with a pipeline between the spiral pipe 2 and the first moisture filter, and the other end of the pipeline TI is provided with an overflow valve 3. The pressure measuring part specifically measures the air pressure in the pipeline TI. Of course, the pressure measuring member and the relief valve 3 may also be provided at other locations or in communication with other locations of the air supply line, without limitation.
The air supply system further comprises an air suction pipeline, and the air suction pipeline is provided with an air inlet and an air outlet communicated with the second port. I.e. the external air firstly enters the air suction pipeline, then enters the air source 1 after being discharged from the air suction pipeline, and enters the air supply pipeline after being discharged from the air source 1.
An air suction filter can be further connected between the air inlet and the air outlet of the air suction pipeline, and the air suction filter can absorb moisture, impurities and/or grease in the gas. By the arrangement, the air is filtered before entering the air source 1, so that less moisture, impurities and the like in the air source 1 can be ensured, and the conditions of rust and the like of the air source 1 are avoided.
The number of the suction filters may be one or more, and the suction filters may be a moisture filter, an oil filter 6, or the like. The type of the air suction filter can be set according to actual conditions.
In addition, the air suction pipeline can be connected in series with a pressure reducing valve 11, and the pressure reducing valve 11 can adjust the air inlet pressure and then the air outlet pressure of the pressure reducing valve 11 so as to keep the outlet pressure of the pressure reducing valve 11 and the air pressure in the air suction pipeline stable.
In addition, a pressure measuring part for measuring the air pressure in the air suction pipeline can be arranged on the air suction pipeline so as to monitor the air pressure in the air suction pipeline in real time, and the pressure measuring part can be specifically a pressure sensor 4.
The air suction filter and the pressure reducing valve 11 may be sequentially arranged along the air flow direction, that is, the air passes through the air suction filter and then enters the air source 1 after passing through the pressure reducing valve 11. The gauge may measure the air pressure in the line between the suction filter and the pressure relief valve 11 directly.
Preferably, the air suction pipe is further connected in series with a buffer bottle 14, the buffer bottle 14 has an air inlet and an air outlet, and the buffer bottle 14 is positioned at the front side of the air suction filter in the air flow direction, that is, the air passes through the buffer bottle 14 and then enters the air suction filter. The air inlet of the buffer bottle 14 communicates directly with the outside air environment.
Further, the buffer bottle 14 further includes a liquid inlet and a liquid outlet. The above-described air supply system also includes a reservoir 15. The plurality of air supply filters at least comprise a liquid filter 5, the air suction filter is a negative pressure liquid filter 12, and the liquid filter 5 and the negative pressure liquid filter 12 are provided with a filtering liquid drain port c0. The liquid filter 5 and the negative pressure liquid filter 12 are provided so that the liquid filtering and discharging port c0 communicates with the reservoir 15, and the water in the liquid filter 5 and the negative pressure liquid filter 12 can be discharged into the reservoir 15 through the liquid filtering and discharging port c0.
In order to facilitate the discharge of the liquid in the reservoir 15, the liquid outlet of the reservoir 15 may be in communication with the liquid inlet of the buffer bottle 14, and when the buffer bottle 14 is under negative pressure, the liquid in the reservoir 15 is sucked into the buffer bottle 14, and the liquid in the buffer bottle 14 is discharged through the liquid outlet of the buffer bottle 14. The liquid outlet of the buffer bottle 14 may be located at the bottom of the buffer bottle 14.
Of course, a water pump or the like may be provided to pump out the water in the reservoir 15, and the present invention is not limited thereto.
In the suction line of the above embodiment, the electromagnetic valves 13 may be provided between the reservoir 15 and the buffer bottle 14 and between the negative pressure liquid filter 12 and the buffer bottle 14.
When the plurality of air supply filters include the oil filter 6 and the first moisture filter, the first moisture filter has the same structure as the above-described liquid filter 5, and the drain port of the oil filter 6 and the filter drain port c0 of the first moisture filter are both communicated with the liquid inlet of the reservoir 15 through the piping T2. The filtering drain c0 of the negative pressure liquid filter 12 communicates with the liquid inlet of the reservoir 15 through the piping T3. The liquid outlet of the reservoir 15 is communicated with the water inlet of the buffer bottle 14 through a pipeline T4.
The negative pressure liquid filter 12 is different from the liquid filter 5 in that a control member may be further disposed at the filtering drain port c0 of the negative pressure liquid filter 12, and the filtering drain port c0 of the negative pressure liquid filter 12 may be opened to drain liquid by the control member, or the filtering drain port c0 of the negative pressure liquid filter 12 may be closed by the control member to stop draining liquid. The control member may be a valve or the like. This facilitates control of the opening and closing of the filter drain port c0 of the negative pressure liquid filter 12.
Further, the control member may be actuated in response to the air pressure in the negative pressure liquid filter 12. For example, when the negative pressure in the negative pressure liquid filter 12 is negative, the control piece is used for blocking the filtering liquid outlet c0, that is, when the negative pressure in the bottle body b0 is negative, the control piece is used for closing the filtering liquid outlet c0 to stop liquid discharge, and meanwhile, the sealing function is achieved, so that the negative pressure in the negative pressure liquid filter 12 is ensured not to be lost. When the negative pressure in the negative pressure liquid filter 12 is non-negative pressure, the control part opens the filtering drain port c0 of the negative pressure liquid filter 12 to drain.
Of course, when the negative pressure in the negative pressure liquid filter 12, that is, when the negative pressure in the bottle b0 is set according to the actual situation, the control member may open the filtering drain port c0 of the negative pressure liquid filter 12 to drain. When the negative pressure liquid filter 12 is in a non-negative pressure state, the control piece is used for blocking the filtering liquid outlet c0, and the control piece is used for closing the filtering liquid outlet c0 to stop liquid discharge. And are not limited thereto.
As shown in fig. 4-7, the control member may include a diaphragm h0, where the diaphragm h0 blocks the filter drain c0 when the negative pressure in the negative pressure liquid filter 12 is greater than the negative pressure set value. Due to the negative pressure in the bottle body b0, the membrane h0 is adsorbed on the filtering liquid outlet c0, and meanwhile, the membrane h0 seals the filtering liquid outlet c0 to stop liquid discharge. When the negative pressure liquid filter 12 is not negative pressure, a gap is provided between the diaphragm h0 and the filter drain port c0. When the negative pressure liquid filter 12 is not negative pressure, the diaphragm h0 is lowered by its own weight (or the weight of the liquid in the bottle b 0) to a gap between the diaphragm h0 and the filtering drain c0, and the liquid in the bottle b0 can be discharged through the gap between the filtering drain c0 and the diaphragm h 0.
Further, the control piece also comprises a liquid leakage cover i0 fixedly connected with the filtering liquid outlet c0, and a liquid leakage hole i01 is formed in the liquid leakage cover i 0. A guide gap is formed between the inner wall of the liquid leakage cover i0 and the filtering liquid outlet c0, the membrane h0 is positioned in the gap, and the membrane h0 can slide along the guide gap to block or open the filtering liquid outlet c0. When the negative pressure in the negative pressure liquid filter 12 is negative pressure and is larger than the negative pressure set value, the diaphragm h0 moves along the guide gap to be adsorbed on the filtering liquid outlet c0, so that the filtering liquid outlet c0 is blocked. When the negative pressure liquid filter 12 is in a non-negative pressure state, the diaphragm h0 moves along the guide gap to contact with the inner wall of the liquid leakage cover i0 due to the action of self gravity (or the gravity of the liquid in the bottle body b 0), at this time, the inner wall of the liquid leakage cover i0 supports the diaphragm h0, and the liquid in the bottle body b0 enters the liquid leakage cover i0 through the liquid filtering and draining port c0 and is further drained through the liquid leakage hole i01.
In the above embodiment, when the negative pressure in the negative pressure liquid filter 12 is negative and greater than the negative pressure set value, the membrane h0 can be adsorbed at the filter outlet against the gravity of the membrane h 0. The non-negative pressure refers to the condition that no negative pressure exists in the bottle body b0, namely, the bottle body is in positive pressure or no pressure difference exists between the bottle body and the external environment.
Specifically, the inner diameter of the filtering drain port c0 is X, the diameter of the membrane h0 is Y, the inner diameter of the drain cover i0 is Z, and X is less than Y and less than Z. So set up, the diaphragm h0 just can shutoff filter leakage fluid dram c0.
As shown in fig. 4, a boss i02 for supporting the diaphragm h0 is provided on the inner side of the drain cover i 0. The inner side of the bottom wall of the liquid leakage cover i0 is provided with a boss i02, the diaphragm h0 can fall onto the boss i02 under the action of self gravity (or the gravity of liquid in the bottle body b 0), and the boss i02 has a supporting effect on the diaphragm h 0. After the boss i02 is arranged, the contact area between the diaphragm h0 and the bottom surface of the liquid leakage cover i0 is reduced, the diaphragm h0 is prevented from being stuck to the bottom surface of the liquid leakage cover i0 due to the surface tension of liquid, the boss i02 is not arranged, and a liquid leakage hole i01 is formed in the bottom surface of the liquid leakage cover i0, so that the contact area between the diaphragm h0 and the bottom surface of the liquid leakage cover i0 is reduced.
In addition, a plurality of drain holes i01 are distributed on the side wall of the drain cover i0 along the circumferential direction, the plurality of drain holes i01 are vertical bar-shaped holes, and the drain holes i01 extend upwards from the bottom side of the side wall so that liquid entering the drain cover i0 can be discharged through the drain holes i01 on the side wall.
Of course, the leakage hole i01 may be located on the bottom wall of the leakage cover i0, and the diaphragm h0 does not seal the leakage cover i0 when the bottle b0 is not under negative pressure, which is not limited herein.
During normal use of the negative pressure liquid filter 12, the bottom wall of the drain cover i0 is positioned at the lower side of the filtering drain port c 0.
Further, the filtering drain port c0 of the negative pressure liquid filter 12 extends outwards to form a convex pipeline, and the drain cover i0 is in threaded connection with the convex pipeline. Therefore, the leakage cover i0 is more convenient to detach, and the leakage cover i0 and the convex pipeline can be clamped or welded, so that the leakage cover is not limited.
Of course, the above-mentioned filtering drain port c0 extends outwards to form a protruding pipe, and extends in a direction away from the negative pressure liquid filter 12 to form a protruding pipe, so that the connection of the drain cover i0 is facilitated. Of course, the protruding pipe may not be provided, and the present invention is not limited thereto.
The negative pressure liquid filter 12 is provided with a stopper surface b01 for abutting against the drain cover i 0. When the top end of the liquid leakage cover i0 is propped against the limiting surface b01, the surface liquid leakage cover i0 is installed in place.
In another embodiment, the position of the filtering drain port c0 of the liquid filter is hinged to the membrane h0, when no negative pressure exists in the bottle b0, the gravity of the membrane h0 (or the gravity of the liquid in the bottle b 0) drives the membrane h0 to rotate, that is, the membrane h0 rotates around the hinge shaft, so that a gap is formed between the membrane h0 and the filtering drain port c0, and the liquid in the bottle b0 can be drained through the gap. When the bottle body b0 has negative pressure and is larger than the negative pressure set value, the atmospheric pressure acts to push the membrane h0 to the position of the filtering liquid outlet c0 and block the filtering liquid outlet c0.
Specifically, the filter drain port c0 of the liquid filter and the diaphragm h0 may be hinged by a hinge, which is not limited herein.
Of course, the control member may also be a valve or the like, which is not limited herein.
Based on the air supply system provided in the above embodiments, the present invention also provides an air pressure driving apparatus including the air supply system and the air driving member 10, the air supply system being the air supply system in any of the above embodiments. The air supply system is mainly used for supplying air to the air driving member 10, and the air driving apparatus adopts the air supply system in the above embodiment, so that the air driving apparatus has the beneficial effects described in the above embodiment.
Further, the pneumatic driver 10 includes a piston 10b and two pneumatic chambers 10a partitioned by the piston 10b, and the pneumatic driving apparatus further includes a vent damper 8 communicating with the vent of the pneumatic chambers 10 a. When the gas in the gas pressure chamber 10a is discharged, the gas enters the exhaust buffer 8, passes through the exhaust buffer 8 and is discharged to the outside. The exhaust damper 8 can generate a certain resistance to the gas discharged from the gas pressure chamber 10 a. The compressed gas in the air pressure cavity 10a expands during exhaust, the temperature is reduced, fog can be formed if the temperature is lower than the dew point temperature, at the moment, the exhaust buffer 8 is arranged, the resistance can be generated during the exhaust of the compressed air in the air pressure cavity 10a, the exhaust speed is reduced, the compressed air in the air pressure cavity 10a slowly expands during the exhaust, the temperature reduction is relatively smaller, the temperature is less easy to lower than the dew point temperature, and fog is less easy to form.
In the above embodiment, when the two air pressure chambers 10a are the first air pressure chamber and the second air pressure chamber, respectively, and the first air pressure chamber and the second air pressure chamber are both provided with air inlets, the reversing valve 9 is disposed between the air supply pipeline and the pneumatic driving member 10. As shown in fig. 1, when the air outlet P of the air supply pipeline is communicated with the port B of the reversing valve 9, the air in the air supply pipeline enters the first air pressure cavity (the right air pressure cavity 10a in fig. 1) through the port P and the port B, and meanwhile, the air in the second air pressure cavity (the left air pressure cavity 10a in fig. 1) enters the exhaust buffer 8 through the port a and the port P1. If the air outlet P of the air supply pipeline is communicated with the port A of the reversing valve 9, the air in the air supply pipeline enters the second air pressure cavity through the port P and the port B, and meanwhile, the air in the first air pressure cavity enters the exhaust buffer 8 through the port B and the port P2.
The number of the exhaust buffers 8 may be two, and the exhaust port of each air pressure chamber 10a is connected to one exhaust buffer 8. Of course, the two air pressure chambers 10a may share one exhaust damper 8, which is not limited herein.
As shown in fig. 8 to 9, the exhaust damper 8 includes a housing 8a having an air inlet and an air outlet, the air inlet of the housing 8a communicating with the air outlet of the air pressure chamber 10a, and the interior of the housing 8a being hollow to form a damper chamber 8b. The gas discharged from the gas pressure chamber 10a first enters the buffer chamber 8b of the exhaust buffer 8 through the gas inlet 8g of the exhaust buffer 8, and then is discharged to the atmosphere through the gas outlet 8c of the exhaust buffer 8. The buffer chamber 8b thus provides a certain resistance to the exhaust gas, and can allow the compressed air in the air pressure chamber 10a to expand slowly during the exhaust gas.
In another embodiment, the exhaust buffer 8 may include an air inlet and an air outlet, and a buffer chamber 8b is formed between the air inlet and the air outlet, and the air is sequentially discharged through the air inlet 8g of the exhaust buffer 8, the buffer chamber 8b, and the air outlet 8c of the exhaust buffer 8. The buffer chamber 8b may have various forms and structures, and in particular, the buffer chamber 8b may be a channel with a variable inner diameter, a square-shaped chamber, or the like, which is not limited herein.
In the above embodiment, the outside of the damper 8 may further be wrapped with the sound absorbing cotton 8f, and the sound absorbing cotton 8f covers the air outlet of the exhaust damper 8, so that the air exhausted through the air outlet of the exhaust damper 8 is exhausted to the atmosphere through the sound absorbing cotton 8f, wherein the sound absorbing cotton 8f can effectively reduce the noise generated when the air is exhausted.
The number of the air outlets of the exhaust buffer 8 may be plural, and the total ventilation area of the plurality of air outlets of the exhaust buffer 8 is larger than the ventilation area of the air inlet of the exhaust buffer 8.
When the housing 8a is square, the air inlet of the exhaust damper 8 is located on the first wall, and the air outlet of the exhaust damper 8 is located on the second wall adjacent to the first wall. Of course, the positions of the air inlet and the air outlet of the exhaust damper 8 may be set by themselves, and are not limited herein.
The exhaust buffer 8 may further comprise an adjusting member for adjusting the opening of the air inlet hole thereof, and the ventilation area of the air inlet hole of the exhaust buffer 8 is changed by the adjusting member, thereby realizing adjustment of the air flow rate and the air volume entering the buffer chamber 8 b.
The housing 8a is provided with an air inlet hole penetrating through the first wall, one end of the air inlet hole is an air inlet, and the other end of the air inlet hole is one end of the air inlet hole, which is close to the buffer cavity 8 b. Wherein, the air inlet on the shell 8a is provided with a conical hole at one end close to the buffer cavity 8b, the adjusting piece is an adjusting rod 8d with one end being a conical end part 8d1, the conical end part 8d1 of the adjusting rod 8d stretches into the conical hole, a gap is arranged between the conical end part 8d1 and the wall of the conical hole, and gas enters into the buffer cavity 8b through the gap between the conical end part 8d1 and the wall of the conical hole. The gap between the tapered end 8d1 and the housing 8a slows down the air flow rate from the air inlet of the exhaust damper 8g into the damper chamber. In this embodiment, the distance that the tapered end portion 8d1 of the adjusting rod 8d extends into the tapered hole is changed, so that the size of the gap between the tapered end portion 8d1 and the wall of the tapered hole is changed, and finally the opening of the air inlet hole of the housing 8a is adjusted.
The adjusting rod 8d can penetrate through the wall of the casing 8a, and a locking nut 8e in threaded connection with the adjusting rod 8d is arranged outside the casing 8a, so that the adjusting rod 8d is positioned through the locking nut 8e after the adjusting rod 8d is adjusted to a proper position. The adjusting rod 8d and the shell 8a can be connected by screw threads, and the distance that the conical end 8d1 of the adjusting rod 8d extends into the conical hole is changed by rotating the adjusting rod 8 d.
Alternatively, the distance that the tapered end portion 8d1 protrudes into the tapered hole may be adjusted by driving the adjustment lever 8d by the driving means, which is not limited herein.
Of course, the adjusting member may have other structures, such as a sliding vane, and the opening of the air inlet of the housing 8a may be adjusted by changing the area of the sliding vane that covers the air inlet of the exhaust buffer 8, which is not limited herein.
As shown in fig. 10, the mechanical gripper includes a gripping jaw a2, the pneumatic driving member 10 is a cylinder a1, the output end of the cylinder a1 is the gripping jaw a2, and the gripping jaw a2 is pneumatically driven to act so as to grasp or put down the object a3 to be gripped. The object to be clamped a3 is clamped when the clamping jaw a2 is closed, and the object to be clamped is released when the clamping jaw a2 is opened. When the clamping jaw a2 is closed or opened at a relatively high speed, the clamped object and the clamping jaw a2 can be impacted, the service life of the clamping jaw is shortened, the clamped object can be damaged and dithered, and when the clamped object contains liquid or powder, the liquid or powder can be splashed. After the exhaust buffer 8 is arranged, the cylinder a1 ensures that the closing and opening speeds of the clamping jaw a2 are slower under the condition that the clamping force of the clamping jaw a2 is unchanged, the impact force on the object a3 to be clamped is smaller, the object to be clamped is protected, and the object to be clamped is effectively prevented from shaking.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. An air supply system capable of supplying air to a pneumatic driving member that drives a mechanical gripper to operate, comprising:
A gas source having a first port and a second port;
The air supply pipeline is provided with an air outlet and an air inlet communicated with the first port, a plurality of air supply filters are connected in series between the air inlet and the air outlet of the air supply pipeline, and the plurality of air supply filters comprise at least one moisture filter;
the air supply pipeline is also connected in series with a spiral pipe, and the spiral pipe has the functions of cooling, dehumidifying and filtering;
the plurality of air supply filters comprise a first moisture filter, an oil filter and a second moisture filter;
The spiral tube, the first moisture filter, the oil filter and the second moisture filter are sequentially distributed along the airflow direction;
the structure of the first moisture filter and the structure of the second moisture filter are different;
the pneumatic driving piece comprises a piston and two pneumatic cavities separated by the piston, exhaust ports of the pneumatic cavities are communicated with an exhaust buffer, and the exhaust buffer can generate certain resistance to the exhausted gas from the pneumatic cavities.
2. The gas supply system of claim 1, wherein at least one of the first moisture filter, the oil filter, and the second moisture filter is a liquid filter having a first flow port, a second flow port, a filter cartridge, and a filter drain, and gas is sequentially discharged through one of the first flow port and the second flow port, the filter cartridge, the other of the first flow port and the second flow port, and liquid inside the liquid filter is capable of being discharged through the filter drain.
3. The gas supply system of claim 2, wherein the liquid filter comprises a bottle cap and a bottle body capable of being sealingly connected to the bottle cap, the filter drain being located on the bottle body;
A first channel and a second channel are arranged in the bottle cap, the first end of the first channel is the first circulation port, the first end of the second channel is the second circulation port, and the second end of the first channel and the second end of the second channel are respectively blocked by two connecting positions of the filter element;
The distance between any connecting position and the filtering liquid draining port is larger than the minimum distance between the filter element and the filtering liquid draining port.
4. The gas supply system according to claim 1, characterized in that the gas supply line is provided with a relief valve for relief of pressure and/or a pressure measuring piece for measuring the gas pressure in the gas supply line.
5. The air supply system according to claim 1, further comprising an air suction line having an air inlet and an air outlet in communication with the second port, and wherein an air suction filter, a pressure reducing valve, and/or a gauge for measuring the air pressure in the air suction line are connected between the air inlet and the air outlet of the air suction line.
6. The air supply system according to claim 5, wherein the air suction pipe is further connected in series with a buffer bottle having an air inlet, an air outlet, a liquid inlet and a liquid outlet;
the air supply filters at least comprise liquid filters, the air suction filters are negative pressure liquid filters, and the liquid filters and the negative pressure liquid filters are provided with filtering liquid discharge ports;
The air supply system further comprises a reservoir, the liquid filter and the filtering liquid outlet of the negative pressure liquid filter are communicated with the reservoir, and the liquid outlet of the reservoir is communicated with the liquid inlet of the buffer bottle.
7. The air supply system according to claim 6, wherein a control member is provided at a filtering drain port of the negative pressure liquid filter, and the control member closes the filtering drain port of the negative pressure liquid filter when the negative pressure is applied to the suction line; when the suction pipeline is in a non-negative pressure state, the control piece opens the filtering liquid outlet of the negative pressure liquid filter.
8. The gas supply system of claim 7, wherein the control member comprises a membrane and a drain cover fixedly connected to the filtering drain, a drain hole is formed in the drain cover, a guide gap is formed between an inner wall of the drain cover and the filtering drain, and the membrane is located in the guide gap and can slide along the guide gap to block or open the filtering drain.
9. A pneumatic drive apparatus comprising a gas supply system and a pneumatic drive, wherein the gas supply system is as claimed in any one of claims 1 to 8.
10. A pneumatic drive apparatus as set forth in claim 9 wherein said exhaust damper comprises a housing having an air inlet and an air outlet, said air inlet of said housing communicating with said air outlet of said pneumatic chamber, said housing being hollow within to form a damper chamber.
11. The air pressure driving apparatus according to claim 10, wherein the air intake hole of the housing has a tapered hole at one end and an air intake hole of the exhaust buffer at the other end, the exhaust buffer further comprising an adjusting lever having a tapered end, the opening degree of the air intake hole of the housing being adjusted by changing a distance by which the tapered end of the adjusting lever protrudes into the tapered hole.
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