CN211203017U

CN211203017U - Combined air outlet valve for heatless regeneration adsorption dryer

Info

Publication number: CN211203017U
Application number: CN201921644316.9U
Authority: CN
Inventors: 陈荣耀; 张剑敏
Original assignee: Shanghai Apureda Industry Co ltd
Current assignee: Shanghai Apureda Industry Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-08-07
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a combination air outlet valve that no heat regeneration adsorption dryer used belongs to gas dryer valve technical field. The method comprises the following steps: compression springs and pistons capable of sliding left and right are symmetrically arranged at the left end and the right end of the valve body, a throttling hole is formed in the center of a valve plate of the piston, a radial through hole is formed in a convex shoulder of the piston, the valve is completely opened when positive pressure difference or negative pressure difference of air inlet and outlet at one side is smaller than set pressure-equalizing action pressure difference, air is discharged at full flow, the valve is closed when negative pressure difference of air outlet at the other side is larger than set pressure-equalizing action pressure difference, dry compressed air is subjected to flow limiting and pressure reducing through the throttling hole in the valve plate and is discharged out of basic regeneration air flow, and the valve is completely opened when the negative. The utility model provides a pair of combination air outlet valve that no heat regeneration adsorption dryer was used, simple structure, cost are lower, simple to operate, have regeneration tolerance regulatory function and self-adaptation voltage-sharing function simultaneously.

Description

Combined air outlet valve for heatless regeneration adsorption dryer

Technical Field

The utility model relates to a gas dryer valve technical field specifically is a combination air outlet valve that no heat regeneration adsorption dryer used.

Background

In the prior art, a perfect outlet valve system of a heatless regenerative adsorption dryer, as shown in fig. 1, generally includes two outlet check valves (61, 62), a regenerative throttling device (66) and two regenerative check valves (63, 64); in order to improve the adaptability to variable working conditions, a regeneration gas flow regulating valve (65) is also required to be configured; in the application of the compressed air with deep drying at the pressure dew point of-40 ℃ or even below-70 ℃, because the switching time of the double towers is short, the pressure in the regeneration tower is difficult to reach the requirement of approaching the air inlet pressure only by charging and accumulating the air after the regeneration of the regeneration orifice for providing the regeneration air quantity is finished, and an electric control or pneumatic control driven pressure equalizing valve (67) is also arranged for avoiding the destructive tower flushing phenomenon caused by the large difference between the air inlet pressure and the tower internal pressure during the switching of the double towers. However, the outlet pipe valve system has the defects of more valve pipe fittings, large assembly and welding workload, higher cost, poorer reliability and the like.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the combined gas outlet valve for the heatless regeneration adsorption dryer is simple in structure, low in cost, convenient to install, and capable of adjusting the regeneration gas quantity and achieving self-adaptive pressure equalizing.

The specific technical scheme is as follows:

a combination gas outlet valve for a non-thermal regenerative adsorption dryer comprising: the middle part of the valve body is provided with a gas outlet which is communicated with a slide way inside the valve body;

the two valve covers are respectively arranged at two ends of the valve body in the length direction, a through air inlet is formed in the outer side of each valve cover, the inner side of each valve cover is connected with a piston through a compression spring, and one end of the piston can be embedded in the slideway in a reciprocating sliding manner along the length direction of the slideway;

the piston comprises a guide shaft, a convex shoulder and a valve plate, wherein the guide shaft is positioned at one end and matched with the slide way, the convex shoulder is positioned at the middle part, the valve plate is positioned at the other end and clamped with the compression spring, a valve plate central throttle hole is formed in the middle part of the valve plate, a plurality of convex shoulder through holes are formed in the radial direction of the convex shoulder, a guide shaft through hole is formed in the length direction of the guide shaft, the valve plate central throttle hole and the plurality of convex shoulder through holes are respectively communicated with one end of the guide shaft through hole, the other end of the guide shaft through hole is communicated with the slide way, in;

and a bypass flow channel is arranged on one side of the valve body, two ends of the bypass flow channel are respectively communicated with the two air inlets, and an adjusting device for adjusting the flow of the bypass flow channel is also arranged in the bypass flow channel.

In the combined air outlet valve for the heatless regeneration adsorption dryer, the characteristics are also provided, two ends of the slideway are both communicated with one side of an inner cavity of the valve body, and one end of the valve cover, which is close to the inner cavity of the valve body, is arranged in a concave manner to form an inner cavity of the valve cover; the other side of each valve body inner cavity is communicated with the valve cover inner cavity, and the valve body inner cavity and the valve cover inner cavity are cylindrical inner cavities.

In the combined air outlet valve for the heatless regeneration adsorption dryer, the air outlet, the guide shaft through hole, the shoulder through hole and the valve body inner cavity form a first air cavity, the air inlet and the valve cover inner cavity form a second air cavity, and the first air cavity and the second air cavity which are positioned on the same side are communicated through a valve plate central throttling hole.

In the combined air outlet valve for the heatless regeneration adsorption dryer, the piston valve plate conical surface is arranged at the outer edge of one side, close to the air inlet, of the valve plate, the valve cover conical surface is arranged at the opening end, provided with the valve cover inner cavity, of the valve cover, and the piston valve plate conical surface and the valve cover conical surface are in sealing fit.

In the above-mentioned combination air outlet valve that no heat regeneration adsorption dryer used, still had such characteristic, two valve covers pass through threaded connection with the valve body respectively, and still are provided with the sealing washer between each valve cover and the valve body.

In the above-mentioned combination air outlet valve that no heat regeneration adsorption dryer was used, still had such characteristic, a ring channel was formed between the lateral wall that the valve gap inner chamber was close to the open end and the wall of valve body inner chamber, and the lateral wall that the valve gap inner chamber was close to the open end seted up a plurality of radial through-holes, a plurality of radial through-holes and ring channel intercommunication.

In the combined air outlet valve for the heatless regeneration adsorption dryer, the side flow channel is composed of a slotted hole outside the valve body and a cover plate, an adjusting nut penetrates through the cover plate, and an adjusting device is arranged at the part of the adjusting nut, which is positioned in the side flow channel.

In the above-mentioned combination air outlet valve that no heat regeneration adsorption dryer used, still have such characteristic, be provided with the O shape sealing washer between adjusting nut and the apron, still be provided with the retaining ring in the screwed hole that is provided with adjusting nut.

In the combined air outlet valve for the heatless regeneration adsorption dryer, the combined air outlet valve is also characterized in that the sections of the valve plate and the convex shoulder are both circular, and the length of the guide shaft is less than the depth of the slide way; the stroke of the piston is less than the length of the guide shaft; the diameter of the inner cavity of the valve body is larger than the outer diameter of the valve plate; the outer diameter of the valve plate is larger than that of the shoulder; the outer diameter of the shoulder is larger than that of the guide shaft.

The positive effects of the technical scheme are as follows:

the utility model provides a combined air outlet valve for a heatless regeneration adsorption dryer,

(1) the compression springs are symmetrically arranged at the left end and the right end of the valve body, the pistons can slide left and right, the throttling holes are arranged at the centers of the valve plates of the pistons, the radial through holes are arranged on the convex shoulders of the pistons, the valve is completely opened and full-flow air outlet is realized when positive pressure difference or negative pressure difference of air inlet and outlet at one side is smaller than set pressure-equalizing action pressure difference, the valve is closed when negative pressure difference of air outlet at the other side is larger than the set pressure-equalizing action pressure difference, dry compressed air is subjected to flow limiting and pressure reducing through the throttling holes on the valve plate and is discharged out of basic regenerated air quantity, the valve is completely opened and full-flow pressure charging and equalizing until the negative pressure difference is smaller than the set pressure-equalizing action pressure difference;

(2) through the arrangement of the throttle hole in the center of the valve plate, basic regenerated gas quantity is reserved, and the situation that an operator closes a regenerated gas channel too small or even completely can be thoroughly avoided, so that destructive accidents such as insufficient regeneration, deterioration of an outlet dew point index, premature deterioration of an adsorbent and tower flushing during double-tower switching caused by insufficient pressure accumulation of a heatless regeneration adsorption type dryer are caused;

(3) the adjustment of the flow of the regenerated gas can be realized by adjusting the adjusting bolt for the regenerated gas on the valve body, so that the requirement of increment adaptation of different working conditions to the regenerated gas quantity is met.

Drawings

FIG. 1 is a system schematic diagram of an outlet pipe valve system of a heatless regenerative adsorption dryer of the prior art;

fig. 2 is a schematic structural diagram of an embodiment of a combined air outlet valve for a heatless regenerative adsorption dryer according to the present invention;

fig. 3 is a cross-sectional view taken at a-a in fig. 2.

In the drawings: 1. a valve body; 2. a valve cover; 3. a piston; 4. a compression spring; 5. adjusting the bolt; 6. a retainer ring; 7. an O-shaped sealing ring; 8. an O-shaped sealing ring; 9. a bypass flow channel; 10. a left air inlet; 11. a right side air inlet; 12. an air outlet; 21. a guide shaft through hole; 22. a shoulder through hole; 23. an inner cavity of the valve body; 25. the inner cavity of the valve cover; 26. a through hole; 27. an annular channel; 28. an adjustment device; 29. a cover plate; 30. a valve plate central orifice; 31. a slideway; 32. a guide shaft; 33. a shoulder is formed; 34. the inner cavity wall of the valve body; 35. a valve plate; 36. a piston valve plate conical surface; 37. a valve cover conical surface; 61. 62, an air outlet one-way valve; 63. 64, a regeneration check valve; 65. a regeneration regulating valve; 66. a regenerative orifice plate; 67. a pressure equalizing valve; 68. 69, 70, 71 and a blow-down valve.

Detailed Description

In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the following embodiments are specifically illustrated with reference to fig. 2 and fig. 3.

In a combined air outlet valve for a heatless regeneration adsorption dryer, a general valve body 1 is arranged in a cylindrical shape, an air outlet 12 is formed in the middle of the outer circumferential surface of the valve body 1, the air outlet 12 is in a bell mouth shape, the air outlet 12 is communicated with a slide way 31 in the valve body 1, and the length direction of the slide way 31 is preferably consistent with the length direction of the valve body 1.

The two valve covers 2 are respectively arranged at two ends of the valve body 1 in the length direction, wherein one part of the valve cover 2 extends into the valve body 1, the outer side of each valve cover 2 is provided with a through air inlet, the left valve cover 2 is provided with a left air inlet 10, the right valve cover 2 is provided with a right air inlet 11, the left air inlet 10 and the right air inlet 11 are respectively communicated with the interior of the valve body 1, the inner side of each valve cover 2 is connected with a piston 3 through a compression spring 4, wherein, the inner side of the valve cover 2 is provided with a limit bulge, the end surface of the piston 3 close to one side of the compression spring 4 is provided with a limit groove, two ends of the compression spring 4 are respectively clamped on the limit bulge and the limit groove at the same side to prevent the compression spring 4 from generating radial movement, one end of the piston 3 is slidably fitted in the slide passage 31 back and forth along the longitudinal direction of the slide passage 31, and the movement of the piston 3 is pushed by the air pressure of the compressed air.

Wherein the piston 3 comprises a guide shaft 32 which is positioned at one end and matched with the slideway 31, a convex shoulder 33 which is positioned at the middle part and a valve plate 35 which is positioned at the other end and clamped with the compression spring 4, namely, the two sides of the convex shoulder 33 are respectively connected with the guide shaft 32 and the valve plate 35, the middle part of the valve plate 35 is provided with a valve plate central throttle hole 30, the valve plate central throttle hole 30 is used for ensuring the regeneration air quantity of the foundation of one tower, the convex shoulder 33 is radially provided with a plurality of convex shoulder through holes 22 which are preferably radially and uniformly distributed, the guide shaft 32 is provided with a guide shaft through hole 21 along the length direction thereof, the valve plate central throttle hole 30 and the plurality of convex shoulder through holes 22 are respectively communicated with one end of the guide shaft through hole 21, wherein most of the compressed air enters the guide shaft through hole 21 from the convex shoulder through hole 22, a small part of the compressed air enters the guide shaft through hole 21 from, the shoulder through holes 22 are communicated with or disconnected from the air inlet (10 or 11) on the same side, wherein the valve plate central throttle hole 30 is always communicated with the air inlet (10 or 11), the shoulder through holes 22 are disconnected with the air inlet (10 or 11) after the valve plate 35 is in contact sealing with the valve cover 35, and the shoulder through holes 22 are communicated with the air inlet (10 or 11) after the valve plate 35 is separated from the valve cover 35.

A bypass channel 9 is arranged on one side of the valve body 1, two ends of the bypass channel 9 are respectively communicated with the two

air inlets

10 and 11, an adjusting device 28 for adjusting the flow of the bypass channel is further arranged in the bypass channel 9, and the size of the middle pipe diameter in the bypass channel 9 is adjusted through the change of the position of the adjusting device. The bypass flow channel 9 can adjust the incremental regeneration gas flow, so that the incremental adaptation requirements of different use working conditions on the regeneration gas flow are met.

In a preferred embodiment, as shown in fig. 2 and 3, both ends of the slide way 31 are communicated with one side of a valve body inner cavity 23, the valve body inner cavity 23 is mainly used for installing one end of the valve cover 2, the compression spring 4 and one end of the piston 3, one end of the valve cover 2 close to the valve body inner cavity 23 is arranged in a concave manner to form a valve cover inner cavity 25, and the valve cover inner cavity 25 is mainly used for installing the compression spring 4; the other side of each valve body inner cavity 23 is communicated with a valve cover inner cavity 25, and the valve body inner cavity 23 and the valve cover inner cavity 25 are cylindrical inner cavities.

In a preferred embodiment, as shown in fig. 2 and 3, the air outlet 12, the guide shaft through hole 21, the shoulder through hole 22 and the valve body inner cavity 23 form a first air cavity, the air inlet 10 and the valve cover inner cavity 25 form a second air cavity, and the first air cavity and the second air cavity which are positioned on the same side are communicated through a valve plate central throttle hole 30.

In a preferred embodiment, as shown in fig. 2 and 3, a piston valve plate conical surface 36 is provided on the outer edge of the valve plate 35 on the side close to the air inlet 10, a valve cover conical surface 37 is provided on the opening end of the valve cover 2 where the valve cover inner cavity 25 is provided, the piston valve plate conical surface 36 and the valve cover conical surface 37 are in sealing fit, the piston valve plate conical surface 36 and the valve cover conical surface 37 are in surface fit, and when the valve plate 35 and the valve cover 2 are in contact, compressed air can be prevented from leaking from the gap between the valve plate 35 and the valve cover 2.

In a preferred embodiment, as shown in fig. 2 and fig. 3, the two valve caps 2 are respectively connected with the valve body 1 through threads, and a sealing ring 8 is further arranged between each valve cap 2 and the valve body 1, so that the structure is simple, the connection is convenient, and the overall sealing performance of the combined air outlet valve is ensured.

In a preferred embodiment, as shown in fig. 2 and 3, an annular channel 27 is formed between an outer side wall of the bonnet inner cavity 25 close to the open end and a wall surface of the valve body inner cavity 23, and a plurality of radial through holes 26 are formed in an outer side wall of the bonnet inner cavity 25 close to the open end, and the plurality of radial through holes 26 are communicated with the annular channel 27, so that compressed air at the air inlet (10 or 11) can be conveniently introduced into the bypass flow channel 9.

In a preferred embodiment, as shown in fig. 2 and 3, the bypass flow channel 9 is formed by a groove hole outside the valve body 1 and a cover plate 29, the cover plate 29 is provided with an adjusting nut 5, and the adjusting device 28 is provided at a portion of the adjusting nut 5 located in the bypass flow channel 9. Further, the adjusting device 28 is a through hole formed in the middle of the stud end of the adjusting nut 5, and the direction of the through hole can be changed by rotating the adjusting nut 5, so that the size of the airflow inside the bypass flow channel 9 can be adjusted, and the requirement of the regeneration air volume under different working conditions can be met.

In a preferred embodiment, as shown in fig. 2 and 3, an O-ring 7 is arranged between the adjusting nut 5 and the cover plate 29, the O-ring 7 is used for ensuring the tightness of the bypass flow channel, a retainer ring 6 is further arranged in the threaded hole in which the adjusting nut 5 is arranged, and the retainer ring 6 is used for limiting the position of the adjusting nut on the cover plate 29.

In a preferred embodiment, as shown in fig. 2 and 3, the valve plate 35 and the shoulder 33 are both circular in cross section, and the length of the guide shaft 32 is less than the depth of the slide way 31; the stroke of the piston 3 is less than the length of the guide shaft 32, so that a part of the guide shaft 32 is always kept in the slideway 31 to prevent the guide shaft 32 from falling off; the diameter of the inner cavity 23 of the valve body is larger than the outer diameter of the valve plate 35, so that the valve plate 35 can move in the inner cavity 23 of the valve body; the outer diameter of the valve plate 35 is larger than that of the shoulder 33; the outer diameter of the shoulder 33 is larger than that of the guide shaft 32, and the end face of the shoulder 33 near the slide 31 abuts against or separates from the valve body inner cavity wall 34.

In the following description, a specific embodiment is described, and it should be noted that the structures, processes and materials described in the following embodiment are only used to illustrate the feasibility of the embodiment, and are not intended to limit the scope of the present invention.

In the technical scheme of the application, a plurality of valve banks at the upper part between the tower A and the tower B in the prior art are replaced by the combined air outlet valve provided by the application, and the tower A and the tower B as well as the emptying valve at the bottom and the like are still needed in the normal working process, so that the working principle can be still explained by combining the partial structure in figure 1 with the structure of the combined air outlet valve provided by the application.

When the heatless regeneration adsorption type dryer is in the stage of adsorption of the tower A and pressure relief and air release of the tower B, saturated compressed air is adsorbed and dried and then flows out of the top of the tower A and enters the left air inlet 10 of the combined air outlet valve, at the moment, the pressure of the left air inlet 10 is Pa, the pressure of the air outlet 12 is Po, the pressure of the right air inlet 11 of the combined air outlet valve is Pb, wherein Pa is slightly larger than Po, Pb is close to the atmospheric pressure, the pressure difference between the left side and the right side of the valve plate center orifice 30 of the piston valve plate 35 on the left side of the combined air outlet valve is positive pressure difference (namely, the pressure on the left side of the valve plate center orifice is larger than the pressure on the right side of the valve plate center orifice), the piston 3 on the left; the pressure difference of the left side and the right side of the valve plate central throttling hole 30 of the piston valve plate 35 on the right side is positive pressure difference and is larger than pressure equalizing action pressure difference, the piston 3 on the right side in the valve body 1 moves rightwards, the piston valve plate conical surface 36 and the valve cover conical surface 37 are closed in a sealing mode, a small part of dry compressed air as regeneration gas enters from the top of the tower B through the right side air inlet 11 after being throttled and depressurized through the valve plate central throttling hole 30 on the right side, and desorption regeneration is conducted on the adsorbent.

When the regeneration of the tower B is finished, the emptying valve 68 at the bottom of the tower B is closed, the tower B enters a pressure accumulation stage, because the flow area of the central orifice 30 of the valve plate is very small, the pressure difference between Po and Pb is gradually reduced along with the pressure accumulation, meanwhile, the Pb lifting speed is gradually reduced, and until the pressure difference between Po and Pb is reduced to the pressure equalizing action pressure difference, the valve plates 35 at the right side in the valve body 1 are all opened under the action of the compression spring 4, the tower B is quickly pressurized, the pressure equalizing process is realized, and the preparation is made for the stable switching of the double towers.

The pressure equalizing process between the combined air outlet valve and the heatless regeneration adsorption dryer is determined automatically according to the calculation and the structural design in advance, and is started through constant pressure equalizing action pressure difference, and the pressure equalizing and air charging process is carried out from top to bottom of the adsorption tower, so that the abrasion of the adsorbent can be slowed down to the maximum extent, and the service life of the adsorbent is effectively prolonged.

The pressure equalizing process of the existing heatless regeneration adsorption dryer needs to be realized by sending a pressure equalizing instruction by a control system and driving the pressure equalizing instruction by an external pneumatic control or electric control device, if no pressure difference feedback signal is input into the control system, the preset fixed action time sequence cannot be completely matched with the actual continuously-changed working condition, and the phenomenon of too early pressure equalizing when the pressure difference is larger can be inevitably generated, so that the abrasion speed of the adsorbent is increased, and even serious tower rushing accidents can occur in medium-high pressure application.

In addition, the valve plate central throttle hole 30 is arranged in the middle of the valve plate 35, and the aperture of the valve plate central throttle hole 30 is determined, so that a basic regeneration air quantity is ensured, and the situation that an operator closes a regeneration air channel too small or even completely closed due to 'gas shortage' can be thoroughly avoided, so that the occurrence of tower flushing accidents caused by serious insufficient regeneration, continuous deterioration of an air outlet dew point index and premature deterioration of an adsorbent of a heatless regeneration adsorption type dryer or even insufficient pressure accumulation during double-tower switching is avoided.

The embodiment of the utility model provides a still dispose bypass flow regeneration air flue, the air flue that bypass flow 9, through-hole 26 and annular channel 27 constitute promptly, regeneration gas adjusting bolt 5 on the accessible adjustment apron 29 realizes the regulation of increment regeneration gas flow to satisfy the increment adaptation requirement of different use operating modes to regeneration gas flow.

To sum up, the utility model provides a combination air outlet valve that no heat regeneration adsorption dryer used is integrated on a valve member with all functional device of a complete no heat regeneration adsorption dryer outlet duct valve system among the prior art to the realization of voltage-sharing function need not rely on automatically controlled or gas accuse actuating system, and the pressure regulating process need not the participation of pressure differential feedback signal source and actuating mechanism, and this combination air outlet valve simple structure, and manufacturing cost is lower, is convenient for install and later maintenance.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. A combined air outlet valve for a heatless regenerative adsorption dryer is characterized by comprising:

the valve comprises a valve body (1), wherein an air outlet (12) is formed in the middle of the valve body (1), and the air outlet (12) is communicated with a slide way (31) in the valve body (1);

the two valve covers (2) are respectively arranged at two ends of the valve body (1) in the length direction, a through air inlet is formed in the outer side of each valve cover (2), the inner side of each valve cover (2) is connected with a piston (3) through a compression spring (4), and one end of each piston (3) can be embedded in the slide way (31) in a reciprocating sliding manner along the length direction of the slide way (31);

wherein the piston (3) comprises a guide shaft (32) which is positioned at one end and matched with the slide way (31), a convex shoulder (33) which is positioned at the middle part and a valve plate (35) which is positioned at the other end and clamped with the compression spring (4), the middle part of the valve plate (35) is provided with a valve plate central throttle hole (30), the convex shoulder (33) is radially provided with a plurality of convex shoulder through holes (22), the guide shaft (32) is provided with a guide shaft through hole (21) along the length direction, the valve plate central throttle hole (30) and the plurality of shoulder through holes (22) are respectively communicated with one end of the guide shaft through hole (21), the other end of the guide shaft through hole (21) is communicated with a slide way (31), in addition, the valve plate central throttle hole (30) is communicated with the air inlet positioned on the same side, and a plurality of shoulder through holes (22) are communicated or disconnected with the air inlet positioned on the same side;

the valve comprises a bypass channel (9), wherein a bypass channel (9) is arranged on one side of the valve body (1), two ends of the bypass channel (9) are respectively communicated with two air inlets (10 and 11), and an adjusting device (28) used for adjusting the flow of the bypass channel is further arranged in the bypass channel (9).

2. The combined gas outlet valve for the heatless regenerative adsorption dryer according to claim 1, wherein both ends of the slide (31) are connected to one side of a valve body cavity (23), and one end of the valve cover (2) close to the valve body cavity (23) is recessed to form a valve cover cavity (25); the other side of each valve body inner cavity (23) is communicated with a valve cover inner cavity (25), and the valve body inner cavity (23) and the valve cover inner cavity (25) are cylindrical inner cavities.

3. The combined air outlet valve for the heatless regenerative adsorption dryer according to claim 2, wherein the air outlet (12), the guide shaft through hole (21), the shoulder through hole (22) and the valve body inner cavity (23) form a first air cavity, the air inlet (10) and the valve cover inner cavity (25) form a second air cavity, and the first air cavity and the second air cavity on the same side are communicated through the valve plate central orifice (30).

4. The combined air outlet valve for the heatless regenerative adsorption dryer according to claim 2, wherein the outer edge of the valve plate (35) near the air inlet (10) is provided with a piston valve plate conical surface (36), the open end of the valve cover (2) provided with the valve cover inner cavity (25) is provided with a valve cover conical surface (37), and the piston valve plate conical surface (36) and the valve cover conical surface (37) are in sealing fit.

5. The combined gas outlet valve for the heatless regenerative adsorption dryer according to claim 1, wherein the two valve covers (2) are respectively connected with the valve body (1) by screw threads, and a sealing ring (8) is further disposed between each valve cover (2) and the valve body (1).

6. The combined outlet valve for the heatless regenerative adsorption dryer according to claim 2, wherein an annular channel (27) is formed between an outer side wall of the bonnet inner cavity (25) near the open end and a wall surface of the valve body inner cavity (23), and a plurality of radial through holes (26) are formed in an outer side wall of the bonnet inner cavity (25) near the open end, and the plurality of radial through holes (26) are communicated with the annular channel (27).

7. The combined outlet valve for non-thermal regeneration adsorption dryer according to claim 1, wherein the bypass flow channel (9) is formed by a slotted hole outside the valve body (1) and a cover plate (29), an adjusting nut (5) is arranged on the cover plate (29) in a penetrating way, and the adjusting device (28) is arranged on the part of the adjusting nut (5) positioned in the bypass flow channel (9).

8. The combined air outlet valve for the heatless regenerative adsorption dryer according to claim 7, wherein an O-ring (7) is disposed between the adjusting nut (5) and the cover plate (29), and a retaining ring (6) is further disposed in the threaded hole in which the adjusting nut (5) is disposed.

9. The combined outlet valve for the heatless regenerative adsorption dryer according to claim 2, wherein the valve plate (35) and the shoulder (33) are circular in cross section, and the length of the guide shaft (32) is smaller than the depth of the slide (31); the stroke of the piston (3) is less than the length of the guide shaft (32); the diameter of the valve body inner cavity (23) is larger than the outer diameter of the valve plate (35); the outer diameter of the valve plate (35) is larger than that of the shoulder (33); the outer diameter of the shoulder (33) is larger than the outer diameter of the guide shaft (32).