CN213077986U

CN213077986U - Double exhaust type single-tower air dryer

Info

Publication number: CN213077986U
Application number: CN202022143972.XU
Authority: CN
Inventors: 宫卫东
Original assignee: Xiangyang Solit Locomotive And Rolling Stock Co Ltd
Current assignee: Xiangyang Solit Locomotive And Rolling Stock Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-04-30
Anticipated expiration: 2030-09-25

Abstract

The utility model relates to the technical field of locomotives, and discloses a double-exhaust type single-tower air dryer, which comprises an integrated valve, a drying tower and an air storage cylinder, wherein the integrated valve is provided with a valve cavity, an air inlet, an exhaust port I, an exhaust port II and an air inlet of the tower, one end of the exhaust port I is communicated with the valve cavity, the other end of the exhaust port I is connected with the atmosphere, one end of the exhaust port II is connected with the valve cavity, the other end of the exhaust port II is connected with the atmosphere, one end of the air inlet of the tower is communicated with the valve cavity; the valve cavity is internally provided with a piston valve and a double-sided valve. The utility model has the advantages of it is following and effect: the integrated valve is arranged on the drying tower, the air compressor is arranged on the air inlet pipeline, the air cylinder is connected with the air oil separator filter element, the air cylinder is connected with the air cylinder, the air.

Description

Double exhaust type single-tower air dryer

Technical Field

The utility model relates to a locomotive braking technical field, in particular to double exhaust formula single tower air dryer.

Background

Compressed air brake systems are widely used on railroad locomotives as reliable brake systems. However, the compressed air brake system also has the disadvantage that the compressed air contains a large amount of moisture which is accumulated at all parts of the brake system to cause the corrosion of elements such as pipelines, valves and the like, and once the elements are frozen after encountering freezing weather, the moving elements are blocked, which is very likely to cause disasters.

In order to solve the problems, the compressed air brake system is provided with an air dryer, the air compressor comprises a drying tower, an integrated valve and an air storage cylinder, the air compressor injects compressed air into the integrated valve through an air inlet pipeline, then the compressed air flows into the drying tower from the integrated valve, after drying and oil and water removal, part of the compressed air enters the air storage cylinder for standby, and most of the compressed air enters a main air cylinder through a one-way valve for use. When the pressure in the main air cylinder reaches a set value, the air compressor stops running, compressed air in the air storage cylinder reversely passes through the drying tower and the integration valve and is discharged from an exhaust port of the integration valve, and water and oil drops adsorbed in the drying tower are blown out from the exhaust port, so that the regeneration of an adsorbent in the drying tower and a filter element of an air oil-water separator is realized. But the compressed air in the inlet duct of air compressor machine also discharges through the gas vent of integrated valve simultaneously, and the compressed air in the inlet duct of air compressor machine uses same gas vent with the compressed air in gas receiver and the drying tower promptly, and this decompression process in the drying tower that just postpones makes adsorbent regeneration effect unsatisfactory in the drying tower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a double exhaust formula single tower air dryer has and adopts double exhaust design, absorbent adsorption effect is good in the drying tower.

The above technical purpose of the present invention can be achieved by the following technical solutions: the double-exhaust type single-tower air dryer comprises an integrated valve, a drying tower and an air storage cylinder, wherein the integrated valve is provided with a valve cavity, an air inlet, a first exhaust port, a second exhaust port and a tower inlet, one end of the first exhaust port is communicated with the valve cavity, the other end of the first exhaust port is connected with the atmosphere, one end of the second exhaust port is connected with the valve cavity, the other end of the second exhaust port is connected with the atmosphere, one end of the tower inlet is communicated with the valve cavity, and the other end of the tower inlet is communicated with the drying tower; and a piston valve and a double-faced valve are arranged in the valve cavity, the piston valve is used for opening and closing the first exhaust port, and the double-faced valve is used for opening and closing a channel between the second exhaust port and the tower inlet and a channel between the air inlet and the tower inlet.

By adopting the technical scheme, when the double-exhaust type single-tower air dryer works, the air inlet pipeline of the air compressor is connected with the air inlet, the piston valve closes the first exhaust port, the double-sided valve closes the second exhaust port and the channel between the air inlet and the tower inlet, and the channel between the air inlet and the tower inlet is opened. Compressed air sequentially passes through the air inlet and the air inlet of the air inlet tower, enters the drying tower, is dried and purified, and then is discharged into the main air cylinder for use, and meanwhile, part of purified clean compressed air is sent to the air storage cylinder for storage.

And when the pressure in the main air cylinder reaches a set value, adjusting the air compressor to enter the no-load operation from the load operation, and stopping air supply. The piston valve opens the first exhaust port, the double-sided valve closes the channel between the air inlet and the tower inlet, and opens the channel between the second exhaust port and the tower inlet, so that residual high-pressure compressed air in the air inlet pipeline of the air compressor firstly enters the valve cavity through the air inlet and then is directly discharged into the atmosphere through the first exhaust port. Clean compressed air in the air cylinder reversely passes through the drying tower and is discharged along the air inlet, the valve cavity and the air outlet, oil drops and water in the drying tower are taken away, rapid pressure reduction in the drying tower is realized, filter elements in a dryer and an air oil-water separator in the drying tower are regenerated, and the regeneration effect is good.

The utility model discloses a further set up to: the double-sided valve is located between the air inlet and the second air outlet, and the air inlet is located between the double-sided valve and the first air outlet.

The utility model discloses a further set up to: the piston valve comprises a piston J, the double-sided valve comprises a valve piece I, a piston H is further installed in the valve cavity, the piston H and the piston J are respectively located at two ends in the valve cavity, and the valve piece I is located between the piston H and the piston J; a first ejector rod is arranged between the piston H and the valve piece I, and a second ejector rod is arranged between the piston J and the valve piece I; the valve cavity is provided with a normally closed end air port and a normally opened end air port at two ends respectively, and the normally closed end air port and the normally opened end air port are connected with compressed air pipes.

Through adopting above-mentioned technical scheme, piston J is close to the end gas port that normally opens, and piston H is close to the end gas port that normally closes. When compressed air is introduced into the normally-opened air port, the first exhaust port is closed after the piston J moves, meanwhile, the piston J drives the valve piece I to move through the second ejector rod, a channel between the air inlet and the tower air inlet is opened, and a channel between the second exhaust port and the tower air inlet is closed. When the normally open end air port is communicated with the atmosphere, compressed air is introduced into the normally closed end air port, the piston H moves, the valve I is driven to move through the ejector rod I, the valve I drives the piston J to move through the ejector rod II, and therefore the opening of the first exhaust port and the opening of a channel between the second exhaust port and the tower inlet are achieved.

The utility model discloses a further set up to: the compressed air pipe is connected with the control valve, and the control valve is used for being connected with a compressed air system.

Through adopting above-mentioned technical scheme, the control valve is used for realizing switching and control function, and the compressed air trachea that switches the end gas port and link to each other with the atmosphere or link to each other with the compressed air system that normally opens, and the compressed air pipe that switches the end gas port and link to each other with the atmosphere or link to each other with the compressed air system.

The utility model discloses a further set up to: a central air pipe is arranged in the middle of the drying tower, a separation cavity is formed between the outer wall of the central air pipe and the inner wall of the drying tower, and an air-oil-water separator and an adsorbent are arranged in the separation cavity; the tower inlet is communicated with the bottom of the separation chamber, the upper end of the central air pipe is provided with an opening, the integrated valve is internally provided with a tower outlet, and the lower end of the central air pipe is communicated with the tower outlet; the integrated valve opens and is equipped with the gas outlet, gas outlet department installs the check valve, still be provided with the regeneration gas passageway in the integrated valve, the one end of regeneration gas passageway with it is linked together to go out the tower gas port, the other end with the gas receiver is linked together.

By adopting the technical scheme, the air oil-water separator is also called as a compressed air oil-water separator, is a gas-liquid separator for compressed air, does not realize the separation of oil and water, and is used for separating impurities such as condensed liquid water and liquid oil in the compressed air. Compressed air passes through an air oil-water separator, and liquid water drops and oil drops are separated. When passing through the adsorbent, the gaseous moisture is adsorbed and separated by the adsorbent to obtain clean compressed air.

The utility model discloses a further set up to: the air oil-water separator is positioned below the adsorbent and comprises a shell and a filter element positioned in the shell.

Through adopting above-mentioned technical scheme, the filter core can adopt fibrous material's filter core.

The utility model discloses a further set up to: the outer shell is annular, the interior of the outer shell is divided into an inner annular cavity and an outer annular cavity, and the lower end of the inner annular cavity and the lower end of the outer annular cavity are communicated with an air inlet of the tower; the filter element is positioned in the outer annular cavity, a pressing plate is arranged at the upper end in the outer annular cavity in a sliding mode, a plurality of through holes penetrating through the pressing plate and a plurality of blocking pieces hinged to the upper end of the pressing plate and covering the through holes are formed in the pressing plate, a top frame is fixed in the outer annular cavity, a plurality of top columns are fixed on the top frame, the top columns correspond to the blocking pieces one by one, the top columns are used for opening the blocking pieces after being turned over, the through holes are opened, a rubber magnetic stripe I is fixed on the pressing plate, a rubber magnetic stripe II is fixed on the top frame, and the rubber magnetic stripe I and the rubber magnetic stripe II attract each other; an adjusting plate is arranged on the inner wall of the upper end of the inner annular cavity in a sliding mode, and the upper end of the adjusting plate is connected with the upper end of the pressing plate through a frame.

Through adopting above-mentioned technical scheme, when the dryer is passed through in the air receiver to the contrary to clean compressed air, the separation blade covers on the through-hole, and in separating the chamber, the space atmospheric pressure of air oil water separator top risees, promotes clamp plate and regulating plate downstream, and the filter core is extruded to the clamp plate for water droplet and the liquid droplet in the filter core are extruded the back and are flowed downwards, along tower air inlet, gas vent two. When the pressing plate moves downwards to the top frame, the first rubber magnetic strip on the pressing plate and the second rubber magnetic strip on the top frame are attracted mutually and then attached tightly, the top column on the top frame penetrates through the through hole and then pushes the separation blade open, compressed air in the separation cavity of the drying tower enters the air oil-water separator through the through hole in the pressing plate, and the compressed air is discharged along the air inlet and the air outlet after passing through the filter element, so that the regeneration effect of the filter element of the air oil-water separator is further improved.

The utility model discloses a further set up to: the upper end of the pressing plate is provided with a limiting seat, and the limiting seat is used for limiting the overturning angle of the separation blade to be smaller than 90 degrees.

Through adopting above-mentioned technical scheme, spacing seat is used for injecing the excessive upset of separation blade.

The utility model discloses a further set up to: and a filter is arranged in the drying tower and is positioned at the opening at the upper end of the central air pipe.

Through adopting above-mentioned technical scheme, the filter is used for filtering compressed air once more.

The utility model discloses a further set up to: the check valve comprises a check valve plate and a return spring used for driving the check valve plate to block one end of the tower outlet.

By adopting the technical scheme, after the pressure in the main air cylinder reaches a set value, the one-way valve is used for preventing compressed air in the main air cylinder from reversely entering the tower outlet and the drying tower.

The utility model has the advantages that:

the integrated valve is designed to be double-exhaust, the integrated valve is provided with a first exhaust port and a second exhaust port, compressed air in an air inlet pipeline of the air compressor is discharged through the first exhaust port, compressed air in the air cylinder and the drying tower is discharged through the second exhaust port, and in the regeneration process of the adsorbent and the filter element of the air oil-water separator, the pressure in the drying tower is rapidly reduced, so that an excellent regeneration effect is achieved.

And two ends of the valve cavity in the integrated valve are respectively provided with a normally open end air port and a normally closed end air port, switching is realized through the control valve, the quick adjustment piston valve and the double-sided valve are realized, the structural design is ingenious, and the use is convenient and quick.

And thirdly, a check valve is arranged at the air outlet, so that the compressed air in the main air cylinder is prevented from being reversely filled into the drying tower.

And fourthly, the pressing plate in the air oil-water separator can squeeze water drops and oil drops in the filter element in the regeneration process of the adsorbent and the filter element, so that the regeneration effect is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the state of the integrated valve when the dual exhaust single tower air dryer of the present invention is not in operation.

Fig. 3 is a schematic diagram showing the state of the integrated valve of the single-exhaust single-tower air dryer of the present invention during operation.

Fig. 4 is a schematic view of the state of the integration valve when the clean compressed air in the air cylinder is blown out reversely.

Fig. 5 is a schematic structural diagram of the air oil-water separator of the present invention.

Fig. 6 is an enlarged view of fig. 5 at a.

In the figure, 1, a drying tower; 11. a central gas pipe; 12. an adsorbent; 13. an air oil-water separator; 131. a housing; 1311. an inner annular cavity; 1312. an outer annular cavity; 132. pressing a plate; 1321. a through hole; 1322. a baffle plate; 1323. a rubber magnetic strip I; 1324. a limiting seat; 133. a top frame; 1331. a top pillar; 1332. a rubber magnetic strip II; 134. an adjusting plate; 135. a frame; 136. a filter element; 14. a filter; 2. an integration valve; 21. a valve cavity; 211. a normally open end air port; 212. a normally closed end port; 22. an air inlet; 23. an air outlet; 24. a first exhaust port; 25. a second exhaust port; 26. a tower inlet; 27. a tower gas outlet; 28. a regeneration gas channel; 3. an air cylinder; 4. a piston J; 5. a piston H; 6. a valve element I; 61. a first ejector rod; 62. a second ejector rod; 7. a one-way valve; 71. a one-way valve plate; 72. a return spring; 8. and (4) controlling the valve.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example (b): a double exhaust type single tower air dryer is shown in figure 1 and comprises a drying tower 1, an integrated valve 2 and an air storage cylinder 3. The integrated valve 2 is located below the drying tower 1, the integrated valve 2 is made of aluminum alloy, a valve cavity 21, an air inlet 22, an air outlet one 24, an air outlet two 25 and a tower air inlet 26 are formed in the integrated valve 2, the air inlet 22, the air outlet one 24 and the air outlet two 25 are located below the valve cavity 21, and the tower air inlet 26 is located above the valve cavity 21. The upper end of the air inlet 22 is communicated with the valve cavity 21, and the lower end is connected with an air inlet pipeline of the air compressor. The upper end of the first exhaust port 24 and the upper end of the second exhaust port 25 are communicated with the valve cavity 21, and the lower end of the first exhaust port 24 and the lower end of the second exhaust port 25 are communicated with the atmosphere. The inlet 22 is located between the first outlet 24 and the second outlet 25.

As shown in fig. 1, one end of the valve cavity 21 is provided with a piston valve, which includes a piston J4 and a spring (not shown), and the piston valve is used for opening and closing the exhaust port one 24. The other end of the valve cavity 21 is provided with a piston H5, the middle part of the valve cavity 21 is provided with a double-sided valve, the double-sided valve comprises a valve element I6, a first mandril 61 is arranged between the valve element I6 and the piston H5, and a second mandril 62 is arranged between the valve element I6 and the piston J4. The double-sided valve is located between the inlet port 22 and the second outlet port 25, and the inlet port 22 is located between the double-sided valve and the first outlet port 24. The valve cavity 21 is provided with a normally open end air port 211 at one end close to the piston J4, a normally closed end air port 212 at one end close to the piston H5, and compressed air pipes are arranged at the normally open end air port 211 and the normally closed end air port 212. The double-row single-tower air dryer further comprises a control valve 8, and the two compressed air pipes are installed on the control valve 8. When the dual exhaust single tower air dryer is not operating, as shown in fig. 2, the spring force acts on the piston J4 to keep the first exhaust port 24, the passageway between the inlet port 22 and the inlet tower port 26, and the passageway between the second exhaust port 25 and the inlet tower port 26 open.

A central air pipe 11 is installed in the drying tower 1, and a separation cavity is formed between the outer wall of the central air pipe 11 and the inner wall of the drying tower 1. The tower air inlet 26 of the integrated valve 2 is communicated with the lower end of the separation chamber, the air oil-water separator 13 and the adsorbent 12 are sequentially arranged in the separation chamber from bottom to top, the upper end of the central air pipe 11 is provided with an opening, and the drying tower 1 is internally provided with a filter 14 at the opening of the upper end of the central air pipe 11. The integrated valve 2 is internally provided with a tower outlet 27, and the lower end of the central air pipe 11 is communicated with the tower outlet 27. The integration valve 2 is also provided with an air outlet 23, and the upper end of the air outlet 23 is communicated with one end of the tower outlet 27. The upper end of the air outlet 23 is provided with a check valve 7, the check valve 7 comprises a valve body, a check valve plate 71 capable of reciprocating, and a return spring 72, and the return spring 72 elastically drives the check valve plate 71 to block one end of the tower air outlet 27. A regeneration gas channel 28 is also arranged in the integrated valve 2, one end of the regeneration gas channel 28 is communicated with the tower outlet 27, and the other end is communicated with the air storage cylinder 3.

As shown in fig. 5 and 6, the air oil water separator 13 includes a casing 131 and a filter element 136, the casing 131 is annular, the central air pipe 11 is inserted into the middle of the casing 131, and a seal is arranged between the outer wall of the central air pipe 11 and the casing 131. An annular partition is arranged inside outer shell 131, and divides the inside of outer shell 131 into an inner annular cavity 1311 and an outer annular cavity 1312, and the lower ends of inner annular cavity 1311 and outer annular cavity 1312 are communicated with tower inlet 26. The filter element 136 is located inside the outer annular cavity 1312, and the filter element 136 is made of a fiber material. The pressing plate 132 is slidably disposed at the upper end inside the outer annular cavity 1312, a plurality of through holes 1321 are formed in the pressing plate 132, a plurality of blocking pieces 1322 are hinged to the upper end face of the pressing plate 132, the blocking pieces 1322 correspond to the through holes 1321 one to one, and each blocking piece 1322 covers the corresponding through hole 1321. An upper frame 133 is fixed on the inner wall of the outer annular cavity 1312, a plurality of top columns 1331 are fixed on the upper frame 133, and each top column 1331 corresponds to one blocking piece 1322. The first rubber magnetic strip 1323 is fixed on the pressing plate 132, the second rubber magnetic strip 1332 is fixed on the top frame 133, and the first rubber magnetic strip 1323 and the second rubber magnetic strip 1332 are mutually attracted. An adjusting plate 134 is slidably connected to the inner upper end of the inner annular chamber 1311, and a frame 135 is connected between the upper end of the adjusting plate 134 and the upper end of the pressure plate 132. The upper end of the pressing plate 132 is provided with a limiting seat 1324, and the limiting seat 1324 is used for limiting the overturning angle of the baffle 1322 to be smaller than 90 degrees.

The working principle is as follows: an air inlet 22 of the integrated valve 2 is connected with an air inlet pipeline of the air compressor, and an air outlet 23 is connected with the main air cylinder through a pipeline. When the total reservoir pressure is lower than the set value, as shown in fig. 3, the compressed air enters the normally open end air port 211 through the control valve 8, the piston J4 is forced to move, and the second ejector rod 62 drives the valve element I6 to move until the piston J4 closes the first exhaust port 24, the valve element I6 closes the passage between the second exhaust port 25 and the tower air inlet 26, and opens the passage between the air inlet 22 and the tower air inlet 26. The air compressor runs under load, air is supplied through the air inlet pipeline, compressed air in the air inlet pipeline sequentially passes through the air inlet 22 and the tower air inlet 26 and then enters a partition cavity in the drying tower 1, passes through the air oil-water separator 13, the adsorbent 12 and the filter 14 and then enters the central air pipe 11, liquid water drops and oil drops in the compressed air are adsorbed and separated by the filter element 136 in the air oil-water separator 13, gaseous moisture is adsorbed and separated by the adsorbent 12, clean compressed air entering the central air pipe 11 downwards enters the tower air outlet 27, part of the clean compressed air enters the air storage cylinder 3 along the regeneration air channel 28, and most of the clean compressed air extrudes the check valve plate 71 of the check valve 7 and then enters the air outlet 23 and then enters the main air cylinder. In the air oil water separator 13, the compressed air with a larger pressure pushes the baffle 1322 upwards to open, so that the compressed air can smoothly pass through the through hole 1321 of the pressing plate 132.

When the pressure of the main air cylinder is higher than a set value, the air compressor enters the no-load operation from the load operation, and air supply is stopped. As shown in fig. 4, the switching control valve 8 is adjusted to connect the normally open port 211 with the atmosphere, the normally closed port 212 is filled with compressed air, the piston H5 is forced to move, the first ejector rod drives the valve element I6 to move, the valve element I6 drives the piston J4 to move through the second ejector rod 62, at this time, the second exhaust port 25 is communicated with the channel between the tower inlet 27, the first exhaust port 24 is opened, and the air inlet 22 is communicated with the atmosphere through the valve cavity 21 and the first exhaust port 24. The compressed air remained in the air inlet pipeline of the air compressor is discharged to the atmosphere through the air inlet 22, the valve cavity 21 and the first exhaust port 24 in sequence.

Clean compressed air in the air storage cylinder 3 enters the central pipe through the regeneration gas channel 28 and is blown to the adsorbent 12 and the air oil-water separator 13 in the reverse direction through the filter 14. The pressing plate 132 in the air oil water separator 13 moves downwards after being pressed until the rubber magnetic strip 1323 on the pressing plate 132 is attached to the rubber magnetic strip two 1332 on the top frame 133 in an adsorption manner, the filter element 136 is pressed in the downward movement process of the pressing plate 132, so that water drops and oil drops in the filter element 136 are extruded out, the top column 1331 on the top frame 133 penetrates through the through hole 1321 and then pushes the separation blade 1322 to turn over, the pressure in the drying tower 1 drops rapidly, and clean compressed air is discharged to the atmosphere through the adsorbent 12, the air oil water separator 13, the tower inlet 26 and the exhaust outlet two 25 in sequence to take away gaseous moisture and liquid water drops and oil drops. Compressed air in the air inlet pipeline is discharged through the first air outlet 24, and compressed air in the drying tower 1 is discharged through the second air outlet 25.

When the pressure of the main air cylinder is smaller than the set value again, the control valve 8 is adjusted to enable the normally closed end air port 212 to be connected with the atmosphere, compressed air is introduced into the normally open end air port 211, the piston J4 moves after being stressed, and the valve element I6 is driven to move through the ejector rod II until the piston J4 closes the exhaust port I24, the valve element I6 closes a channel between the exhaust port II 25 and the tower inlet 26, and a channel between the air inlet 22 and the tower inlet 26 is opened. Therefore, the filter element 136 in the air-water separator 13 is in a compressed state, the air supply of the air compressor is sufficient, the pressure at the tower outlet 27 is high, the adjusting plate 134 in the inner annular cavity 1311 is pushed to move upwards, the adjusting plate 134 drives the pressing plate 132 to move upwards through the frame 135 and then is separated from the top frame 133, and the resetting of the adjusting plate 134 is realized.

Claims

1. Double exhaust formula single tower air dryer, including integrated valve (2), drying tower (1), gas receiver (3), its characterized in that: the integrated valve (2) is provided with a valve cavity (21), an air inlet (22), an air outlet I (24), an air outlet II (25) and an air inlet (26) of the drying tower, one end of the air outlet I (24) is communicated with the valve cavity (21) and the other end of the air outlet I (24) is connected with the atmosphere, one end of the air outlet II (25) is connected with the valve cavity (21) and the other end of the air outlet II (25) is connected with the atmosphere, one end of the air inlet (26) of the drying tower is communicated with the valve cavity (21) and the other end of the air inlet; a piston valve and a double-faced valve are installed in the valve cavity (21), the piston valve is used for opening and closing the first exhaust port (24), and the double-faced valve is used for opening and closing a channel between the second exhaust port (25) and the tower inlet (26) and a channel between the air inlet (22) and the tower inlet (26).

2. The dual exhaust, single tower air dryer as in claim 1, wherein: the double-sided valve is located between the air inlet (22) and the second air outlet (25), and the air inlet (22) is located between the double-sided valve and the first air outlet (24).

3. The dual exhaust, single tower air dryer as claimed in claim 2, wherein: the piston valve comprises a piston J (4), the double-sided valve comprises a valve piece I (6), a piston H (5) is further installed in the valve cavity (21), the piston H (5) and the piston J (4) are respectively located at two ends in the valve cavity (21), and the valve piece I (6) is located between the piston H (5) and the piston J (4); a first ejector rod (61) is arranged between the piston H (5) and the valve member I (6), and a second ejector rod (62) is arranged between the piston J (4) and the valve member I (6); the two ends of the valve cavity (21) are respectively provided with a normally closed end air opening (212) and a normally opened end air opening (211), and the normally closed end air opening (212) and the normally opened end air opening (211) are both connected with a compressed air pipe.

4. The dual exhaust, single tower air dryer as in claim 3, wherein: the device is characterized by further comprising a control valve (8), the compressed air pipes are connected with the control valve (8), and the control valve (8) is used for being connected with a compressed air system.

5. The dual exhaust, single tower air dryer as in claim 1, wherein: a central air pipe (11) is installed in the middle of the drying tower (1), a separation cavity is formed between the outer wall of the central air pipe (11) and the inner wall of the drying tower (1), and an air-oil-water separator (13) and an adsorbent (12) are installed in the separation cavity; the tower inlet (26) is communicated with the bottom of the separation chamber, the upper end of the central air pipe (11) is provided with an opening, the integrated valve (2) is internally provided with a tower outlet (27), and the lower end of the central air pipe (11) is communicated with the tower outlet (27); gas outlet (23) have been seted up in integrated valve (2), check valve (7) are installed in gas outlet (23) department, still be provided with regeneration gas passageway (28) in integrated valve (2), the one end of regeneration gas passageway (28) with go out tower gas port (27) and be linked together, the other end with air receiver (3) are linked together.

6. The dual exhaust, single tower air dryer as in claim 5, wherein: the air oil-water separator (13) is positioned below the adsorbent (12), and the air oil-water separator (13) comprises a shell (131) and a filter element (136) positioned in the shell (131).

7. The dual exhaust, single tower air dryer as in claim 6, wherein: the outer shell (131) is annular, the inner part of the outer shell (131) is divided into an inner annular cavity (1311) and an outer annular cavity (1312), and the lower end of the inner annular cavity (1311) and the lower end of the outer annular cavity (1312) are communicated with the tower inlet (26); the filter element (136) is positioned inside the outer annular cavity (1312), the upper end inside the outer annular cavity (1312) is provided with a pressing plate (132) in a sliding way, the pressing plate (132) is provided with a plurality of through holes (1321) penetrating through the pressing plate (132) and a plurality of baffle plates (1322) hinged at the upper end of the pressing plate (132) and covering the through holes (1321), a top frame (133) is fixed in the outer annular cavity (1312), a plurality of top columns (1331) are fixed on the top frame (133), the top columns (1331) correspond to the separation blades (1322) one by one, the top columns (1331) are used for jacking the separation blades (1322) and opening the through holes (1321) after being turned over, a first rubber magnetic strip (1323) is fixed on the pressing plate (132), a second rubber magnetic strip (1332) is fixed on the top frame (133), the rubber magnetic strip I (1323) and the rubber magnetic strip II (1332) are mutually attracted; an adjusting plate (134) is arranged on the inner wall of the upper end of the inner annular cavity (1311) in a sliding mode, and the upper end of the adjusting plate (134) is connected with the upper end of the pressing plate (132) through a frame (135).

8. The dual exhaust, single tower air dryer as in claim 7, wherein: the upper end of the pressing plate (132) is provided with a limiting seat (1324), and the limiting seat (1324) is used for limiting the overturning angle of the baffle plate (1322) to be smaller than 90 degrees.

9. The dual exhaust, single tower air dryer as in claim 5, wherein: a filter (14) is installed in the drying tower (1), and the filter (14) is located at an opening at the upper end of the central air pipe (11).

10. The dual exhaust, single tower air dryer as in claim 5, wherein: the check valve (7) comprises a check valve plate (71) and a return spring (72) used for driving the check valve plate (71) to block one end of the tower outlet (27).