CN114210136A

CN114210136A - Integrated air outlet valve for suction dryer

Info

Publication number: CN114210136A
Application number: CN202111552200.4A
Authority: CN
Inventors: 黄刚
Original assignee: Changsha Shungao Mechanical And Electrical Equipment Co ltd
Current assignee: Changsha Shungao Mechanical And Electrical Equipment Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-03-22
Anticipated expiration: 2041-12-17
Also published as: CN114210136B

Abstract

The invention discloses an integrated air outlet valve for a suction dryer, which comprises a valve body, wherein the valve body is provided with two air inlet and outlet ports, an air outlet port, an external back-blowing air port, a first inner cavity communicated with the air outlet port and a second inner cavity communicated with the external back-blowing air port, each air inlet and outlet port is connected with the first inner cavity through a first one-way valve only enabling air to flow to the first inner cavity in a one-way mode, each air inlet and outlet port is connected with the second inner cavity through a second one-way valve only enabling air to flow to the second inner cavity in a one-way mode, a pressure equalizing channel communicated with the first inner cavity and the second inner cavity is arranged in the valve body, and the pressure equalizing channel is provided with a throttle valve and an on-off control valve. The integrated air outlet valve for the suction dryer has the advantages of greatly reduced connecting pipelines, simplicity and convenience in installation and maintenance, compact structure, small occupied space, low manufacturing cost, low failure rate and the like.

Description

Integrated air outlet valve for suction dryer

Technical Field

The invention relates to the technical field of compressed air purification equipment, in particular to an integrated air outlet valve for a suction dryer.

Background

In the field of compressed air purification, due to special air intake requirements, reversing functions of air intake and discharge are often required. For example, as shown in fig. 1, which is a typical pressure swing adsorption gas circuit system adopted by an existing dryer, the working process and principle of the pressure swing adsorption gas circuit system is that a first solenoid valve 1 and a fourth solenoid valve 4 are mutually matched to form a first gas circuit, a second solenoid valve 2 and a third solenoid valve 3 are mutually matched to form a second gas circuit, when a first adsorption tower 100 works, the second solenoid valve 2 and the third solenoid valve 3 are closed, the first solenoid valve 1 and the fourth solenoid valve 4 are opened, a gas source enters the first adsorption tower 100 through the first solenoid valve 1, the first adsorption tower 100 is filled with an adsorbent, purified gas enters downstream through a first check valve 6 and is provided to gas-using equipment, externally-derived blowback gas (generally low pressure) enters a second adsorption tower 200 through a second check valve 7 to blow back (or resolve, regenerate) impurity gas trapped in the adsorbent in the last cycle, after the back-blowing gas passes through the second adsorption tower 200, the tail gas is exhausted through a fourth electromagnetic valve 4; when the second adsorption tower 200 works, the first electromagnetic valve 1 and the fourth electromagnetic valve 4 are closed, the second electromagnetic valve 2 and the third electromagnetic valve 3 are opened, the air source enters the second adsorption tower 200 through the second electromagnetic valve 2, the adsorbent is filled in the second adsorption tower 200, the purified gas first check valve 6 enters the downstream and is provided for gas utilization equipment, the back flushing gas (with lower general pressure) from the outside enters the first adsorption tower 100 through the second check valve 7 to back flush (or resolve and regenerate) the impurity gas intercepted in the adsorbent in the last period, and the back flushing gas empties the tail gas through the third electromagnetic valve 3 after passing through the first adsorption tower 100. The first gas circuit and the second gas circuit work alternately, so that the gas source alternately passes through the first adsorption tower 100 and the second adsorption tower 200 for purification, and simultaneously, when one adsorption tower works, the other adsorption tower is filled with back flushing gas for adsorbent regeneration.

In order to avoid the influence of pressure mutation on downstream gas utilization equipment and slow down the pulverization phenomenon of the adsorbent in the first adsorption tower 100 and the second adsorption tower 200 due to the pressure mutation, a pressure equalizing stage is added before the switching of the first adsorption tower 100 and the second adsorption tower 200, for example, after the adsorbent in the second adsorption tower 200 is fully regenerated, the fourth electromagnetic valve 4 is closed in advance, the fifth electromagnetic valve 5 is opened at the same time, so that the gas purified by the first adsorption tower 100 enters the second adsorption tower 200 through the fifth electromagnetic valve 5, after the pressure in the second adsorption tower 200 is gradually increased from normal pressure to working pressure, the first electromagnetic valve 1 and the fifth electromagnetic valve 5 are closed, and the second electromagnetic valve 2 and the third electromagnetic valve 3 are opened at the same time.

However, in the existing pressure swing adsorption gas path system, the gas paths at the gas outlet ends of the first adsorption tower 100 and the second adsorption tower 200 are formed by connecting isolated electromagnetic valves and a plurality of one-way valves by using connectors and pipelines, so that a plurality of required gas path components and parts and a plurality of fault points are needed, and the pipeline connection is complicated, inconvenient to install and maintain, large in occupied space and poor in aesthetic property.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art and provides the integrated air outlet valve of the suction dryer, which can greatly reduce connecting pipelines, is simple and convenient to install and maintain, has a compact structure, occupies less space, and has low manufacturing cost and low failure rate.

In order to solve the technical problems, the invention adopts the following technical scheme:

an integrated air outlet valve for a suction dryer comprises a valve body, wherein the valve body is provided with two air inlet and outlet ports, an air outlet port, an external back-blowing air port, a first inner cavity communicated with the air outlet port and a second inner cavity communicated with the external back-blowing air port, each air inlet and outlet port is connected with the first inner cavity through a first check valve only enabling air to flow in one direction to the first inner cavity, each air inlet and outlet port is connected with the second inner cavity through a second check valve only enabling air to flow in one direction to the second inner cavity, a pressure equalizing channel communicated with the first inner cavity and the second inner cavity is arranged in the valve body, and the pressure equalizing channel is provided with a throttle valve and an on-off control valve.

As a further improvement of the above technical solution:

and a filter is arranged in a pressure equalizing channel between the first inner cavity and the throttle valve.

And the valve body is provided with a pilot air port extending from the outside of the valve body to the inside of the valve body, and the pilot air port is communicated with a pressure equalizing channel between the filter and the second inner cavity.

The filter is connected with the clearance hole that is used for filter core surface dust, the clearance hole is equipped with the clearance valve that is used for controlling the opening and closing of clearance hole.

The valve body is provided with two first holes and a second hole which extend from the outside of the valve body to the inside of the valve body, the opening ends of the two first holes and the second hole are respectively provided with a first plug in a detachable mode, the second hole is communicated with the two first holes, the second hole between the two first holes is used as the first inner cavity, the valve body is provided with a third hole which extends from the outside of the valve body to the inside of the valve body and is communicated with an exhaust port, and the third hole is communicated with the second hole between the two first holes; the valve body is provided with two fourth holes which extend from the outside of the valve body to the inside of the valve body and respectively correspondingly communicate the two air inlet and outlet ports, the two fourth holes respectively correspond to the two first holes to be communicated, and the two first check valves are respectively and correspondingly arranged in the two first holes.

The valve body is equipped with two fifth holes and a sixth hole from the valve body outside to the inside extension of valve body, install with detachable mode on the valve body and open port confined shrouding with two fifth holes, two second check valves correspond respectively and install two in the fifth hole, the second end cap is installed with detachable mode to the open end in the sixth hole, two fifth holes of sixth hole intercommunication, the sixth hole conduct between two fifth holes the second inner chamber, be equipped with on shrouding and the valve body and run through the seventh hole that the shrouding extended to the valve body inside and communicate outside anti-blowing mouth from the shrouding outside, the sixth hole between two fifth holes of seventh hole intercommunication.

The valve body is equipped with two eighth holes that extend to the valve body inside from the valve body outside, and every eighth hole communicates a fourth hole and a fifth hole respectively, and the third end cap is installed with detachable mode to the open end in two eighth holes.

Business turn over gas port, gas vent and outside anti-gas mouth all locate on the shrouding, two business turn over gas ports are respectively through the through-hole and two fourth hole intercommunications that run through the shrouding, the gas vent through the through-hole that runs through the shrouding with third hole intercommunication, outside anti-gas mouth through the through-hole and the seventh hole intercommunication that run through the shrouding.

The valve body is equipped with from the outside ninth hole and the tenth hole that extends to the valve body inside of valve body, ninth hole intercommunication first inner chamber and tenth hole, the filter is installed in the ninth hole, the open end at the ninth hole is installed to the cleaning valve, the choke valve is installed in the tenth hole, the tenth hole at choke valve both ends communicates ninth hole and second inner chamber respectively, the open end in tenth hole is installed to the on-off control valve and control the break-make of choke valve, the valve body is equipped with the eleventh hole that extends and communicate to the valve body inside from the guide's gas port, the ninth hole between eleventh hole intercommunication filter and the choke valve.

And the external back-blowing gas port is provided with a third one-way valve which only enables gas to flow to the second inner cavity in a one-way manner.

Compared with the prior art, the invention has the advantages that:

the integrated air outlet valve for the suction dryer integrates the first one-way valve, the second one-way valve, the throttle valve, the on-off control valve and each channel on the valve body, can greatly reduce connecting pipelines when used for a pressure swing adsorption system, avoids the problem of complex pipeline connection, enables the installation and maintenance to be simpler and more convenient, reduces the failure rate, has good aesthetic property, has small integral size and small occupied space, and is beneficial to reducing the manufacturing cost. Meanwhile, the integrated gas outlet valve can be matched with a pressure swing adsorption gas path system to realize the functions of gas inlet, gas outlet and pressure equalizing, and the requirement of the pressure swing adsorption gas path system can be met.

Drawings

Fig. 1 is a schematic diagram of a conventional pressure swing adsorption gas path system.

Fig. 2 is a schematic diagram of an integrated gas outlet valve.

Fig. 3 is a schematic perspective view of an integrated gas outlet valve.

Fig. 4 is a schematic front view of the integrated air outlet valve.

FIG. 5 is a schematic sectional view of A-A in FIG. 4.

FIG. 6 is a schematic sectional view of B-B in FIG. 4.

Fig. 7 is a left side view structural schematic diagram of the integrated air outlet valve.

Fig. 8 is a rear view structural schematic diagram of the integrated air outlet valve.

FIG. 9 is a schematic cross-sectional view of C-C in FIG. 8.

Fig. 10 is a schematic sectional view of D-D in fig. 8.

FIG. 11 is a schematic cross-sectional view of E-E of FIG. 8.

Illustration of the drawings:

1. a valve body; 10. closing the plate; 11. an air inlet and an air outlet; 12. an exhaust port; 13. an external blowback port; 14. a pressure equalizing channel; 15. a pilot gas port; 16. cleaning the holes; 2. a throttle valve; 21. a first check valve; 22. a second one-way valve; 23. a third check valve; 3. an on-off control valve; 31. cleaning the valve; 4. a filter; 101. a first lumen; 102. a second lumen; 201. a first hole; 202. a second hole; 203. a third aperture; 204. a fourth aperture; 205. a fifth aperture; 206. a sixth hole; 207. a seventh hole; 208. an eighth hole; 209. a ninth well; 210. a tenth aperture; 211. an eleventh well; 301. a first plug; 302. a second plug; 303. and a third plug.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples.

As shown in fig. 2 to 11, the integrated outlet valve for a suction dryer of this embodiment includes a valve body 1, the valve body 1 is provided with two inlet and outlet ports 11, one outlet port 12, one external blowback port 13, a first inner cavity 101 communicated with the outlet port 12 and a second inner cavity 102 communicated with the external blowback port 13, each inlet and outlet port 11 is connected to the first inner cavity 101 through a first check valve 21 that only allows gas to flow in one direction to the first inner cavity 101, each inlet and outlet port 11 is connected to the second inner cavity 102 through a second check valve 22 that only allows gas to flow in one direction to the second inner cavity 102, a pressure equalizing passage 14 that communicates the first inner cavity 101 and the second inner cavity 102 is provided in the valve body 1, and the pressure equalizing passage 14 is provided with a throttle valve 2 and an on-off control valve 3.

This integrated air outlet valve is applicable to the control of giving vent to anger of inhaling dry machine pressure swing adsorption gas circuit system, during the use, corresponds two adsorption towers that are connected to pressure swing adsorption gas circuit system with two business turn over gas ports 11 respectively, and the definition needs the adsorption tower of work to be tower A, and another adsorption tower is tower B. When the tower A works in an adsorption mode, the gas treated by the tower A is discharged and supplied to downstream gas utilization equipment through the gas inlet and outlet 11, the first check valve 21, the first inner cavity 101 and the gas outlet 12 corresponding to the tower A in sequence; in the adsorption working process of the tower A, when the tower B needs to perform back blowing work, back blowing gas is introduced from an external back blowing gas port 13, and the back blowing gas enters the tower B and back blows the adsorbent in the tower B sequentially through a second inner cavity 102, a second check valve 22 and an air inlet and outlet 11 corresponding to the tower B; after the adsorbent in the tower B is fully regenerated, when pressure equalization of the tower B is needed, the on-off control valve 3 is opened, so that a part of dry gas in the first inner cavity 101 enters the second inner cavity 102 through the pressure equalization channel 14, and then enters the tower B through the second check valve 22 and the gas inlet and outlet 11, and the tower B is stamped.

This integrated air outlet valve is integrated on valve body 1 with first check valve 21, second check valve 22, choke valve 2, on-off control valve 3 and each passageway, when being used for the pressure swing adsorption system, but the connecting line that significantly reduces avoids the tedious problem of tube coupling, makes installation, maintenance more simple and convenient, reduces the fault rate, and the aesthetic property is good, and integrated air outlet valve's overall dimension is little, and occupation space is few, does benefit to reduction in manufacturing cost. Meanwhile, the integrated gas outlet valve can be matched with a pressure swing adsorption gas path system to realize the functions of gas inlet, gas outlet and pressure equalizing, and the requirement of the pressure swing adsorption gas path system can be met.

Because the pressure equalizing channel 14 is provided with the throttle valve 2, the throttle valve 2 can control the flow of the gas flowing to the second inner cavity 102, so that when no external back-flushing gas is supplied, the suction dryer can open the on-off control valve 3 to switch to a self-regeneration mode, the dependence on the external back-flushing gas is reduced, and the application range of the suction dryer is expanded. And the on-off control valve 3 is connected with the first inner cavity 101 and the second inner cavity 102, so that the unidirectional air flow direction can be ensured, when any adsorption tower is subjected to back blowing operation, the air flow direction always flows from the first inner cavity 101 to the second inner cavity 102, the on-off control valve 3 does not need to have the characteristic of bidirectional interaction, a control valve with lower cost can be adopted, and the cost is favorably reduced.

In this embodiment, the pressure equalization channel 14 between the first chamber 101 and the throttle valve 2 is provided with a filter 4. The dry gas at the outlet of the adsorption tower is often large in dust content due to the natural pulverization phenomenon of the adsorbent, and the throttle valve 2 is easy to block due to the small pore size under the normal condition, so that a filter 4 is additionally arranged in front of the throttle valve 2, the dust in the gas can be effectively filtered, and the risk of dust deposition and blocking of the throttle valve 2 is reduced.

In this embodiment, the valve body 1 is provided with a pilot port 15 extending from the outside of the valve body 1 to the inside of the valve body 1, and the pilot port 15 communicates with the pressure equalizing passage 14 between the filter 4 and the second inner chamber 102. Clean pilot air supply can be provided for the elements in the system which need pilot air.

In this embodiment, the filter 4 is connected to a cleaning hole 16 for removing dust on the surface of the filter element of the filter 4, and the cleaning hole 16 is provided with a cleaning valve 31 for controlling the opening and closing of the cleaning hole 16. The cleaning holes 16 and the cleaning valve 31 are arranged, so that dust deposited on the surface of the filter element of the filter 4 can be discharged periodically according to needs, and the service life of the filter element is prolonged. Preferably, the purge valve 31 is a manual ball valve.

In this embodiment, the valve body 1 is provided with two first holes 201 and one second hole 202 extending from the outside of the valve body 1 to the inside of the valve body 1, the open ends of the two first holes 201 and the one second hole 202 are respectively provided with a first plug 301 in a detachable manner, the second hole 202 is communicated with the two first holes 201, the second hole 202 between the two first holes 201 is used as a first inner cavity 101, the valve body 1 is provided with a third hole 203 extending from the outside of the valve body 1 to the inside of the valve body 1 and communicated with the exhaust port 12, and the third hole 203 is communicated with the second hole 202 between the two first holes 201; the valve body 1 is provided with two fourth holes 204 which extend from the outside of the valve body 1 to the inside of the valve body 1 and are respectively communicated with the two air inlets 11, the two fourth holes 204 are respectively communicated with the two first holes 201, and the two first check valves 21 are respectively and correspondingly arranged in the two first holes 201. The structure is convenient to manufacture and assemble, simplifies the gas circuit, reduces the complexity of the gas circuit and is beneficial to improving the simple and compact structure of the integrated gas outlet valve.

In this embodiment, the valve body 1 is provided with two fifth holes 205 and one sixth hole 206 extending from the outside of the valve body 1 to the inside of the valve body 1, the valve body 1 is detachably provided with a sealing plate 10 for sealing the open ends of the two fifth holes 205, the two second check valves 22 are respectively and correspondingly installed in the two fifth holes 205, the open end of the sixth hole 206 is detachably provided with a second plug 302, the sixth hole 206 is communicated with the two fifth holes 205, the sixth hole 206 between the two fifth holes 205 is used as the second inner cavity 102, the sealing plate 10 and the valve body 1 are provided with a seventh hole 207 extending from the outside of the sealing plate 10 to the inside of the valve body 1 through the sealing plate 10 and communicating with the outside back-blowing port 13, and the seventh hole 207 is communicated with the sixth hole 206 between the two fifth holes 205. The structure is convenient to manufacture and assemble, simplifies the gas circuit, reduces the complexity of the gas circuit and is beneficial to improving the simple and compact structure of the integrated gas outlet valve. And the closing plate 10 is adopted to close the opening of the fifth hole 205, so as to facilitate the assembly of the second check valve 22. Preferably, the open end of the first hole 201 and the open end of the fifth hole 205 are separately arranged on two opposite sides of the valve body 1, so as to facilitate the design and arrangement of the internal channel of the valve body 1.

In this embodiment, the valve body 1 is provided with two eighth holes 208 extending from the outside of the valve body 1 to the inside of the valve body 1, each eighth hole 208 is respectively communicated with one fourth hole 204 and one fifth hole 205, and the open ends of the two eighth holes 208 are detachably provided with third plugs 303. The structure is convenient to manufacture and assemble, simplifies the gas circuit, reduces the complexity of the gas circuit and is beneficial to improving the simple and compact structure of the integrated gas outlet valve.

In this embodiment, the air inlet and outlet 11, the exhaust port 12 and the external blowback port 13 are all provided on the sealing plate 10, the two air inlet and outlet 11 are respectively communicated with the two fourth holes 204 through the through holes penetrating the sealing plate 10, the exhaust port 12 is communicated with the third hole 203 through the through holes penetrating the sealing plate 10, and the external blowback port 13 is communicated with the seventh hole 207 through the through holes penetrating the sealing plate 10. Is convenient for connecting external pipelines and is convenient for manufacturing.

In this embodiment, the valve body 1 is provided with a ninth hole 209 and a tenth hole 210 extending from the outside of the valve body 1 to the inside of the valve body 1, the ninth hole 209 communicates with the first inner cavity 101 and the tenth hole 210, the filter 4 is installed in the ninth hole 209, the cleaning valve 31 is installed at the opening end of the ninth hole 209, the throttle valve 2 is installed in the tenth hole 210, the tenth holes 210 at both ends of the throttle valve 2 communicate with the ninth hole 209 and the second inner cavity 102, respectively, the on-off control valve 3 is installed at the opening end of the tenth hole 210 and controls the on-off of the throttle valve 2, the valve body 1 is provided with an eleventh hole 211 extending from the pilot gas port 15 to the inside of the valve body 1 and communicating with the inside of the valve body 1, and the eleventh hole 211 communicates with the ninth hole 209 between the filter 4 and the throttle valve 2. The structure is convenient to manufacture and assemble, simplifies the gas circuit, reduces the complexity of the gas circuit, is beneficial to improving the simple and compact structure of the integrated gas outlet valve, and is convenient for the installation of the filter 4, the cleaning valve 31, the throttle valve 2 and the on-off control valve 3.

In this embodiment, the external blowback port 13 is provided with a third check valve 23 for allowing only one-way flow of gas into the second cavity 102. When the first inner cavity 101 leads gas to the second inner cavity 102 through the pressure equalizing channel 14, the gas is ensured not to flow out from the external blowback gas port 13, and the leading-in of blowback gas from the external blowback gas port 13 is not influenced.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.

Claims

1. The utility model provides an integrated air outlet valve for blotting machine which characterized in that: the valve comprises a valve body (1), wherein the valve body (1) is provided with two air inlet and outlet openings (11), an air outlet (12), an external back-blowing opening (13), a first inner cavity (101) communicated with the air outlet (12) and a second inner cavity (102) communicated with the external back-blowing opening (13), each air inlet and outlet opening (11) is connected with the first inner cavity (101) through a first one-way valve (21) which only enables air to flow in one direction to the first inner cavity (101), each air inlet and outlet opening (11) is connected with the second inner cavity (102) through a second one-way valve (22) which enables air to flow in one direction to the second inner cavity (102), a pressure equalizing channel (14) which communicates the first inner cavity (101) and the second inner cavity (102) is arranged in the valve body (1), and the pressure equalizing channel (14) is provided with a throttle valve (2) and an on-off control valve (3).

2. The integrated air outlet valve for a squeegee of claim 1, wherein: and a filter (4) is arranged on a pressure equalizing channel (14) between the first inner cavity (101) and the throttle valve (2).

3. The integrated air outlet valve for a squeegee of claim 2, wherein: the pressure equalizing valve is characterized in that a pilot air port (15) extending from the outside of the valve body (1) to the inside of the valve body (1) is formed in the valve body (1), and the pilot air port (15) is communicated with a pressure equalizing channel (14) between the filter (4) and the second inner cavity (102).

4. An integrated air outlet valve for a squeegee according to claim 3 wherein: the filter (4) is connected with a cleaning hole (16) for removing dust on the surface of a filter element of the filter (4), and the cleaning hole (16) is provided with a cleaning valve (31) for controlling the opening and closing of the cleaning hole (16).

5. The integrated air outlet valve for a squeegee of claim 4, wherein: the valve body (1) is provided with two first holes (201) and a second hole (202) which extend from the outside of the valve body (1) to the inside of the valve body (1), the opening ports of the two first holes (201) and the second hole (202) are provided with first plugs (301) in a detachable mode, the second hole (202) is communicated with the two first holes (201), the second hole (202) between the two first holes (201) is used as the first inner cavity (101), the valve body (1) is provided with a third hole (203) which extends from the outside of the valve body (1) to the inside of the valve body (1) and is communicated with an exhaust port (12), and the third hole (203) is communicated with the second hole (202) between the two first holes (201); the valve body (1) is provided with two fourth holes (204) which extend from the outside of the valve body (1) to the inside of the valve body (1) and respectively correspond to and communicate with the two air inlet and outlet ports (11), the two fourth holes (204) respectively correspond to and communicate with the two first holes (201), and the two first check valves (21) are respectively and correspondingly installed in the two first holes (201).

6. The integrated air outlet valve for a squeegee of claim 5, wherein: the valve body (1) is provided with two fifth holes (205) and a sixth hole (206) which extend from the outside of the valve body (1) to the inside of the valve body (1), a closing plate (10) for closing the open ends of the two fifth holes (205) is detachably arranged on the valve body (1), two second one-way valves (22) are respectively and correspondingly arranged in the two fifth holes (205), a second plug (302) is detachably mounted at the open end of the sixth hole (206), the sixth hole (206) is communicated with two fifth holes (205), the sixth hole (206) between the two fifth holes (205) is used as the second inner cavity (102), the sealing plate (10) and the valve body (1) are provided with a seventh hole (207) which penetrates through the sealing plate (10) from the outside of the sealing plate (10) to extend to the inside of the valve body (1) and is communicated with an external blowback hole (13), the seventh hole (207) communicates with the sixth hole (206) between the two fifth holes (205).

7. The integrated air outlet valve for a squeegee of claim 6, wherein: the valve body (1) is provided with two eighth holes (208) extending from the outside of the valve body (1) to the inside of the valve body (1), each eighth hole (208) is communicated with one fourth hole (204) and one fifth hole (205) respectively, and a third plug (303) is detachably mounted at the opening ends of the two eighth holes (208).

8. The integrated air outlet valve for a squeegee of claim 7, wherein: business turn over gas port (11), gas vent (12) and outside anti-blow gas mouth (13) all locate on shrouding (10), two business turn over gas ports (11) are respectively through the through-hole and two fourth holes (204) intercommunication that run through shrouding (10), gas vent (12) through the through-hole that runs through shrouding (10) with third hole (203) intercommunication, outside anti-blow gas mouth (13) through the through-hole and seventh hole (207) intercommunication that run through shrouding (10).

9. The integrated air outlet valve for a squeegee of claim 4, wherein: the valve body (1) is provided with a ninth hole (209) and a tenth hole (210) which extend from the outside of the valve body (1) to the inside of the valve body (1), the ninth hole (209) is communicated with the first inner cavity (101) and the tenth hole (210), the filter (4) is installed in the ninth hole (209), the cleaning valve (31) is installed at the open end of the ninth hole (209), the throttle valve (2) is arranged in the tenth hole (210), the tenth holes (210) at the two ends of the throttle valve (2) are respectively communicated with the ninth hole (209) and the second inner cavity (102), the on-off control valve (3)) is arranged at the opening end of a tenth hole (210) and controls the on-off of the throttle valve (2), the valve body (1) is provided with an eleventh hole (211) which extends from the pilot air port (15) to the interior of the valve body (1) and is communicated with the pilot air port, the eleventh hole (211) communicates with a ninth hole (209) between the filter (4) and the throttle valve (2).

10. An integrated air outlet valve for a squeegee according to any one of claims 1 to 9 wherein: the external back-blowing opening (13) is provided with a third one-way valve (23) which only enables gas to flow to the second inner cavity (102) in one way.