A positive and negative pressure centralized air supply system

Abstract

The present application relates to a positive and negative pressure centralized air supply system, which belongs to the field of printing air supply technology. The positive and negative pressure centralized air supply system includes a machine room and a positive and negative pressure screw pump arranged in the machine room. An air inlet is provided on the machine room, a drying box is provided in the machine room, a mounting bar is rotatably provided in the drying box, a drying box with a drying type desiccant inside is provided on both sides of the mounting bar, a plurality of air holes are provided through the drying box, the drying box on one side of the mounting bar is located in the drying box, the drying box on the other side is located outside the drying box, the drying box outside the drying box is used to block the air inlet, a driving assembly for driving the mounting bar to rotate is provided on the drying box, the heat exhaust port of the positive and negative pressure screw pump is connected to a heat exhaust pipe, the heat exhaust pipe is wound on the outer wall of the drying box, and the end of the heat exhaust pipe away from the positive and negative pressure screw pump extends to the outside of the machine room. The present application has the effect of facilitating the utilization of the waste heat of the air supply equipment and reducing the waste of waste heat to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of printing air supply, and in particular to a positive and negative pressure centralized air supply system. Background Art

[0002] Compressed air needs to be provided at the printing production site, and the existing air supply method generally adopts a centralized air supply system to centrally supply air to all printing equipment.

[0003] At present, the centralized air supply system on the market usually includes a machine room set up at the work site, in which an air compressor or a positive and negative pressure screw pump is installed. The air is compressed by the air compressor or the positive and negative pressure screw pump to centrally supply air to various printing equipment. The positive and negative pressure screw pump can effectively reduce the exhaust gas discharge and noise pollution. Since the air compressor or the positive and negative pressure screw pump will generate a lot of waste heat during operation, the heat is wasted. Summary of the invention

[0004] In order to facilitate the utilization of waste heat from gas supply equipment and reduce waste heat waste to a certain extent, the present application provides a positive and negative pressure centralized gas supply system.

[0005] The positive and negative pressure centralized gas supply system provided in this application adopts the following technical solutions:

[0006] A positive and negative pressure centralized air supply system comprises a machine room and a positive and negative pressure screw pump arranged in the machine room, the machine room is provided with an air inlet, a drying box is arranged in the machine room, a mounting strip is rotatably arranged in the drying box, drying boxes with a dryable desiccant inside are arranged on both sides of the mounting strip, a plurality of air holes are penetrated through the drying box, a plane where the air inlet is located is parallel to a plane where the drying box is located, the drying box on one side of the mounting strip is located in the drying box, and the drying box on the other side is located outside the drying box, and the drying box located outside the drying box is used to shield the air inlet, a through hole is provided in the drying box for the drying box on one side to pass through, an opening is provided in the drying box for the drying box to rotate, the opening is connected to the through hole, a driving assembly for driving the mounting strip to rotate is provided on the drying box, a heat exhaust port of the positive and negative pressure screw pump is connected with a heat exhaust pipe, the heat exhaust pipe is wound on the outer wall of the drying box, and one end of the heat exhaust pipe away from the positive and negative pressure screw pump extends to the outside of the machine room.

[0007] By adopting the above technical scheme, the waste heat generated during the operation of the positive and negative pressure screw pumps is used to heat the drying box to a certain extent through the heat exhaust pipe, and the desiccant in the drying box inside the drying box is dried. The desiccant in the drying box outside the drying box dehumidifies and dries the air entering the machine room to a certain extent. After a period of time, the driving component drives the mounting strip to rotate 180°, so that the drying box inside the drying box is rotated out of the drying box, and the drying box located on the side outside the drying box is rotated into the drying box for drying, thereby realizing the use of the waste heat generated by the air supply equipment to dry the desiccant in the drying box for reuse, reducing heat waste, and at the same time helping to provide dry air for the positive and negative pressure screw pumps.

[0008] Preferably, two mounting bars are provided, and the arrangement direction of the two mounting bars is parallel to the rotation axis of the mounting bar, and the rotation axis of the mounting bar is parallel to the depth direction of the air inlet. The driving assembly includes a fan blade rotatably arranged in the heat exhaust pipe and a transmission member arranged on the drying box, and the rotation axis of the fan blade is parallel to the rotation axis of the mounting bar. The transmission member is used to drive the two mounting bars to rotate at different times when the fan blade rotates.

[0009] By adopting the above technical solution, the hot air in the heat exhaust pipe drives the fan blades to rotate, and the fan blades drive the two installation strips to rotate at different times through the transmission member, so that the installation strips drive the drying boxes on both sides to rotate, so as to dry the desiccants in the drying boxes on both sides in turn. The fan blades drive the installation strips to rotate, which helps to save costs and further utilize the hot air; the rotation of the two installation strips at different times helps to fully dehumidify the air entering the air inlet, thereby improving the dehumidification and drying effects.

[0010] Preferably, a rotating rod is provided on the mounting bar, and the rotating rod is rotatably inserted into the drying box, and the rotating rod on one mounting bar is movably sleeved on the rotating rod of another mounting bar, and the transmission member includes a first transmission rod, a second transmission rod, a first gear, a second gear, a third gear and a fourth gear, the first transmission rod is arranged on the fan blade, the first transmission rod is rotatably inserted into the heat exhaust pipe, the first gear is sleeved on one end of the first transmission rod located outside the heat exhaust pipe, the second transmission rod rotates on the drying box, the rotation axis of the second transmission rod is parallel to the rotation axis of the mounting bar, the second gear is sleeved on the second transmission rod, the second gear is meshed with the first gear, the first gear is half-toothed, the third gear and the rotating rod correspond one-to-one, the third gear is respectively sleeved on the corresponding rotating rod, the fourth gear and the third gear correspond one-to-one, the fourth gear is sleeved on the second transmission rod, the fourth gear is meshed with the corresponding third gear, the fourth gear is half-toothed, the number of teeth of the fourth gear is half of the number of teeth of the corresponding third gear, and the tooth segments of the two fourth gears are arranged in different directions.

[0011] By adopting the above technical solution, the fan blades drive the first transmission rod to rotate when rotating, and the second transmission rod is intermittently rotated through the transmission of the first gear and the second gear. The two rotating rods are intermittently rotated through the transmission of the third gear and the fourth gear, and the rotation time of the two rotating rods is different, so that the two mounting strips drive the drying boxes on both sides to rotate intermittently at different times, so as to dry the desiccant in the drying boxes on both sides in turn, so as to ensure the dehumidification effect and provide dry air for the positive and negative pressure screw pumps.

[0012] Preferably, an opening and closing plate for opening and closing the opening is hinged on the inner wall of the opening, the rotation axis of the opening and closing plate is perpendicular to the rotation axis of the mounting strip, and an elastic driving member is provided on the inner wall of the opening, and the elastic driving member is used to drive the opening and closing plate to rotate toward the direction close to the opening to close the opening.

[0013] By adopting the above technical solution, when the installation strip drives the drying boxes on both sides to rotate, the drying boxes abut against the opening and closing plates, driving the opening and closing plates to rotate in the direction away from the opening; when the installation strip drives the drying box to rotate to the required position, that is, after rotating 180°, the elastic driving member drives the installation strip to rotate in the direction close to the opening until the opening is closed, which helps to improve the drying effect of the drying box, thereby ensuring the dehumidification and drying effect of the air to a certain extent.

[0014] Preferably, a rotating shaft is provided on the opening and closing plate, and the rotating shaft rotates on the inner wall of the opening. The elastic driving member includes a torsion spring for driving the opening and closing plate to rotate toward the direction close to the opening. The torsion spring is movably sleeved on the rotating shaft, and one end of the torsion spring is arranged on the inner wall of the opening, and the other end is arranged on the opening and closing plate.

[0015] By adopting the above technical solution, after the installation strip drives the drying boxes on both sides to rotate to the desired position, the torsion spring drives the opening and closing plate to rotate in the direction close to the opening until the opening is closed, which helps to maintain the temperature in the drying box to ensure the dehumidification effect of the desiccant in the drying box on the air.

[0016] Preferably, the top wall of the drying box is provided with two water guide plates, and the distance between the two water guide plates increases towards the direction approaching the drying box.

[0017] By adopting the above technical solution, the water guide plate is arranged to guide the water generated by evaporation of the desiccant in the drying box to a certain extent, so as to reduce the possibility of the evaporated water directly dripping on the drying box, thereby ensuring the drying effect of the desiccant.

[0018] Preferably, a collecting trough is provided in the drying box, and the collecting trough is located below the two water guide plates. The collecting trough is connected to a drainage pipe, and the drainage pipe runs through the drying box and the machine room.

[0019] By adopting the above technical solution, the collection trough collects the water flowing down the water guide plate and discharges it to the outside of the machine room through the drain pipe, which helps to reduce the possibility of water flowing to the bottom wall of the drying box.

[0020] Preferably, a water tank is provided outside the machine room, the drainage pipe is connected to the water tank, one end of the heat exhaust pipe away from the positive and negative pressure screw pumps is wound around the outer wall of the water tank, the water tank is connected with a water inlet pipe, the water tank is connected with a water outlet pipe, and a control valve is provided on the water outlet pipe.

[0021] By adopting the above technical solution, the heat exhaust pipe heats the water in the water tank, thereby further utilizing the waste heat generated by the gas supply equipment, which helps to reduce waste heat waste. At the same time, the water outlet pipe allows hot water to be used as needed.

[0022] Preferably, four guide plates are arranged on the inner wall of the machine room, and two opposite guide plates are located on both sides of the drying box.

[0023] By adopting the above technical solution, the guide plate is arranged to guide the air entering the machine room so that the air passes through the drying box, thereby ensuring the dehumidification and drying effect of the air.

[0024] Preferably, a reduction ring is provided on the heat exhaust pipe, the first transmission rod rotates in the reduction ring, and the reduction ring and the first transmission rod are in abutment with each other.

[0025] By adopting the above technical solution, the provision of the deceleration ring increases the friction between the deceleration ring and the first transmission rod, thereby helping to reduce the rotation speed of the first transmission rod.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] The waste heat generated when the positive and negative pressure screw pumps are running heats the drying box to a certain extent through the heat exhaust pipe, and dries the desiccant in the drying box inside the drying box. The desiccant in the drying box outside the drying box dehumidifies and dries the air entering the machine room to a certain extent. After a period of time, the drive assembly drives the mounting bar to rotate 180°, so that the drying box inside the drying box is rotated out of the drying box, and the drying box outside the drying box is rotated into the drying box for drying, thereby realizing the use of the waste heat generated by the air supply equipment to dry the desiccant in the drying box for reuse, reducing heat waste, and at the same time helping to provide dry air for the positive and negative pressure screw pumps;

[0028] The heat exhaust pipe heats the water in the water tank, thereby further utilizing the waste heat generated by the gas supply equipment, helping to reduce waste heat waste, while facilitating the use of hot water as needed through the water outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of the overall structure of an embodiment of the present application.

[0030] Figure 2 It is a cross-sectional view of the overall structure of the drying box in the embodiment of the present application.

[0031] Figure 3 It is an exploded view of the overall structure of the drying box from another perspective in the embodiment of the present application, mainly used to display the drive components.

[0032] Figure 4 yes Figure 1 Enlarged view of part A.

[0033] Figure 5 yes Figure 2 Enlarged view of part B.

[0034] Explanation of reference numerals: 1. machine room; 2. positive and negative pressure screw pump; 3. air inlet; 4. drying box; 5. mounting strip; 6. drying box; 7. air hole; 8. through hole; 9. opening; 10. driving assembly; 101. fan blade; 102. transmission member; 1021. first transmission rod; 1022. second transmission rod; 1023. first gear; 1024. second gear; 1025. third gear; 1026. fourth gear; 11. row Heat pipe; 12. Rotating rod; 13. Opening and closing plate; 14. Rotating shaft; 15. Torsion spring; 16. Water guide plate; 17. Collecting tank; 18. Drain pipe; 19. Water storage tank; 20. Water inlet pipe; 21. Water outlet pipe; 22. Control valve; 23. Guide plate; 24. Speed ​​reduction ring; 25. Gas storage tank; 26. Cold dryer; 27. Connecting pipe; 28. Check valve; 29. ​​Gas distribution rod; 30. Gas distribution branch pipe; 31. Pressure relief valve; 32. Rubber pad. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] The present application embodiment discloses a positive and negative pressure centralized air supply system. Figure 1 and Figure 2The positive and negative pressure centralized air supply system includes a machine room 1 and a positive and negative pressure screw pump 2 arranged in the machine room 1. In other embodiments, the positive and negative pressure screw pump 2 can be replaced by an air compressor; an air inlet 3 is opened on the upper part of the side wall of the machine room 1, and a drying box 4 is fixedly connected to the top wall of the machine room 1. Two mounting bars 5 are rotatably arranged in the drying box 4, and a rotating rod 12 is fixedly connected to the mounting bar 5. The rotating rod 12 is located at the center of the mounting bar 5, and the rotating rod 12 is rotatably penetrated on the drying box 4. The rotation axis of the mounting bar 5 is parallel to the depth direction of the air inlet 3, and the arrangement direction of the two mounting bars 5 is parallel to the rotation axis of the mounting bar 5. The length direction of the mounting bar 5 is perpendicular to the rotation axis of the mounting bar 5. Drying boxes 6 with a dryable desiccant inside are fixedly connected on both sides of the mounting bar 5. A plurality of air holes 7 are opened through the drying box 6. The two drying boxes 6 are located in the length direction of the mounting bar 5. On both sides of the drying box 6, the plane where the drying box 6 is located is parallel to the plane where the air inlet 3 is located, and the rotation axis of the mounting bar 5 is perpendicular to the plane where the drying box 6 is located. In the present embodiment, the drying box 6 is a drying box with silica gel inside. In other embodiments, the drying box 6 with silica gel inside can be replaced by a drying box 6 with anhydrous calcium chloride inside; the drying box 6 on one side of the mounting bar 5 is located in the drying box 4, and the drying box 6 on the other side is located outside the drying box 4. The drying box 6 outside the drying box 4 corresponds to the air inlet 3 and is used to block the air inlet 3. A through hole 8 for the drying box 6 on one side to pass through is provided on the bottom wall of the drying box 4. An opening 9 for the drying box 6 to rotate is provided on the bottom wall of the drying box 4. The openings 9 are located on both sides of the through hole 8, and the openings 9 are connected to the through hole 8. The drying box 4 is provided with a driving component 10 for driving the two mounting bars 5 to rotate at different time periods.

[0037] Reference Figure 1 and Figure 2 The heat exhaust port of the positive and negative pressure screw pump 2 is connected to a heat exhaust pipe 11, which is wound around the outer wall of the drying box 4. One end of the heat exhaust pipe 11 away from the positive and negative pressure screw pump 2 extends to the outside of the machine room 1.

[0038] During operation, the drying box 6 located outside the drying box 4 dries and dehumidifies the air entering from the air inlet 3, so as to provide dry air for the positive and negative pressure screw pump 2; the positive and negative pressure screw pump 2 generates a large amount of waste heat during operation, and the waste heat enters the heat exhaust pipe 11, and heats the interior of the drying box 4 through the heat exhaust pipe 11, thereby drying the desiccant in the drying box 6 in the drying box 4 for reuse; after a certain period of time, the driving component 10 drives the mounting bar 5 in the drying box 4 to rotate at different times, and the desiccant in the drying box 6 on both sides of the mounting bar 5 is dried in turn to ensure the dehumidification effect of the desiccant in the drying box 6, realize the utilization of the waste heat of the air supply equipment, and reduce heat waste. The mounting bar 5 drives the drying boxes 6 on both sides to rotate at different times, so that when one of the drying boxes 6 rotates, the drying box 6 on the other mounting bar 5 corresponds to the air inlet 3, so as to ensure the dehumidification effect of the air entering the air inlet 3.

[0039] Reference Figure 1 Four guide plates 23 are fixed on the inner wall of the machine room 1. The longitudinal sections of the four guide plates 23 are rectangular. Two opposite guide plates 23 are respectively located on both sides of the drying box 6. The distance between the two opposite guide plates 23 increases toward the direction close to the drying box 6, which is conducive to allowing the air entering from the air inlet 3 to pass through the drying box 6 to ensure the dehumidification and drying effect of the air.

[0040] Reference Figure 2 and Figure 3 In order to facilitate driving the two mounting bars 5 to rotate at different times, the driving assembly 10 includes a fan blade 101 rotatably arranged in the heat exhaust pipe 11 and a transmission member 102 arranged on the drying box 4. The rotation axis of the fan blade 101 is parallel to the rotation axis of the mounting bar 5. The transmission member 102 is used to drive the two mounting bars 5 to rotate at different times when the fan blade 101 rotates.

[0041] Reference Figure 2 and Figure 3 The rotating rod 12 on one mounting bar 5 is movably mounted on the rotating rod 12 of another mounting bar 5. The transmission member 102 includes a first transmission rod 1021, a second transmission rod 1022, a first gear 1023, a second gear 1024, a third gear 1025 and a fourth gear 1026. The first transmission rod 1021 is fixedly connected to the axis position of the fan blade 101. The first transmission rod 1021 is rotatably mounted on the heat exhaust pipe 11 through a bearing. The first transmission rod 1021 faces away from the air inlet 3 (refer to Figure 1), the first gear 1023 is fixedly sleeved on one end of the first transmission rod 1021 outside the heat exhaust pipe 11, the first gear 1023 is half-toothed, the second transmission rod 1022 rotates on the outer wall of the drying box 4 away from the air inlet 3 through a bearing, the rotation axis of the second transmission rod 1022 is parallel to the rotation axis of the rotating rod 12, the second gear 1024 is fixedly sleeved on the second transmission rod 1022, the second gear 1024 is meshed with the first gear 1023, the number of teeth of the first gear 1023 is less than the number of teeth of the second gear 1024, and the radius of the first gear 1023 is less than the radius of the second gear 1024, so as to slow down the rotation speed of the second transmission rod 1022; the third gear 1024 is fixedly sleeved on the second transmission rod 1022, the second gear 1024 is meshed with the first gear 1023, the number of teeth of the first gear 1023 is less than the number of teeth of the second gear 1024, and the radius of the first gear 1023 is less than the radius of the second gear 1024, so as to slow down the rotation speed of the second transmission rod 1022; 025 corresponds to the rotating rod 12 one by one, the third gear 1025 is fixedly mounted on the corresponding rotating rod 12, the fourth gear 1026 corresponds to the third gear 1025 one by one, the fourth gear 1026 is fixedly mounted on the second transmission rod 1022, the fourth gear 1026 is meshed with the corresponding third gear 1025, the fourth gear 1026 is half-toothed, the number of teeth of the fourth gear 1026 is half of the number of teeth of the corresponding third gear 1025, the tooth segments of the two fourth gears 1026 are arranged in different directions. In this embodiment, the tooth segments of the two fourth gears 1026 are arranged in opposite directions, and the radius of the fourth gear 1026 is greater than the radius of the third gear 1025, so as to accelerate the rotation speed of the rotating rod 12. In other embodiments, the driving assembly 10 can be replaced by a motor arranged on the drying box 4, and the motor and the rotating rod 12 correspond one to one. A transmission gear is fixed to the output end of the motor, and a fixed gear is fixedly sleeved on each rotating rod 12. The transmission gear and the corresponding fixed gear are meshed. The motor is used to drive the transmission gear to drive the fixed gear to rotate, and the two mounting bars 5 can also be rotated at different times.

[0042] The hot air in the heat exhaust pipe 11 drives the fan blade 101 to rotate, so that the first transmission rod 1021 drives the first gear 1023 to rotate. Since the first gear 1023 is a half-tooth, it drives the second gear 1024 and the second transmission rod 1022 to rotate intermittently. The number of teeth of the first gear 1023 is less than the number of teeth of the second gear 1024, so that the rotation speed of the second transmission rod 1022 is slower than that of the first transmission rod 1021; when the second transmission rod 1022 rotates, it drives the fourth gear 1026 to rotate. Since the fourth gear 1026 is a half gear, it drives The third gear 1025 and the rotating rod 12 are driven to rotate intermittently, and the number of teeth of the fourth gear 1026 is half of the number of teeth of the third gear 1025, so that the third gear 1025 rotates 180° each time it drives the rotating rod 12 to rotate, so as to make the mounting bar 5 rotate intermittently, and each time the mounting bar 5 rotates, the drying box 6 located in the drying box 4 is rotated out of the drying box 4, and the drying box 6 located outside the drying box 4 is rotated into the drying box 4; the tooth segments of the two fourth gears 1026 are arranged in opposite directions, so that the two rotating rods 12 can rotate at different times.

[0043] Reference Figure 3 A deceleration ring 24 is fixedly bonded to the outer wall of the heat exhaust pipe 11, and the first transmission rod 1021 rotates in the deceleration ring 24, and the deceleration ring 24 and the first transmission rod 1021 are in contact. In this embodiment, the deceleration ring 24 is a rubber ring, and in other embodiments, the rubber ring can be replaced by a plastic ring. The deceleration ring 24 increases the friction force of the first transmission rod 1021, which helps to reduce the rotation speed of the fan blade 101 and the first transmission rod 1021 to the required speed, thereby helping to extend the interval time of each rotation of the installation strip 5, so that the drying box 6 on one side can fully absorb the moisture in the air, and the drying box 6 on the other side can be fully dried.

[0044] Reference Figure 1 and Figure 2 Two water guide plates 16 are fixedly connected to the inner wall of the top of the drying box 4, and the two water guide plates 16 are connected on the sides close to each other, and the spacing between the two water guide plates 16 on the sides away from each other increases toward the direction close to the mounting strip 5. A collecting groove 17 is fixedly connected to the inner wall of the drying box 4, and the collecting groove 17 is located below the two water guide plates 16. The cross-section of the collecting groove 17 is U-shaped, and the collecting groove 17 protrudes outward in the direction away from the air inlet 3. One end of the collecting groove 17 is connected to a drain pipe 18, and the drain pipe 18 runs through the drying box 4 and the machine room 1. The bottom wall of the collecting groove 17 on the side away from the drain pipe 18 is inclined downward in the direction away from the air inlet 3, and the bottom wall of the collecting groove 17 on the side away from the air inlet 3 is inclined downward toward the side close to the collecting groove 17 connected with the drain pipe 18.

[0045] Reference Figure 1 and Figure 4 A water tank 19 is fixedly installed on the outer wall of the machine room 1. The cross-section of the water tank 19 is circular. The drainage pipe 18 outside the machine room 1 is connected to the water tank 19. The heat exhaust pipe 11 outside the machine room 1 is wound around the outer wall of the water tank 19. One end of the heat exhaust pipe 11 away from the positive and negative pressure screw pump 2 is used to extend outside the factory building. The water tank 19 is connected to a water inlet pipe 20 with an end cover. The bottom wall of the water tank 19 is connected to a water outlet pipe 21, and a control valve 22 is installed on the water outlet pipe 21.

[0046] During the drying process of the drying box 6 in the drying box 4, the moisture in the desiccant evaporates, and water droplets drip into the collecting tank 17 along the water guide plate 16. Since the bottom wall of the collecting tank 17 is inclined, the water in the collecting tank 17 flows toward the drain pipe 18 and is discharged from the drain pipe 18 to the water storage tank 19. The hot air in the heat exhaust pipe 11 heats the water in the water storage tank 19 for use as needed, thereby further utilizing the waste heat generated by the gas supply equipment. At the same time, external water can be added to the water storage tank 19 through the water inlet pipe 20 for heating, and the water outlet pipe 21 is opened and closed by controlling the valve 22 for easy use.

[0047] Reference Figure 2and Figure 5 , an opening and closing plate 13 is hinged on the inner wall of the opening 9, a rotating shaft 14 is arranged on the opening and closing plate 13, the rotating shaft 14 rotates on the inner wall of the opening 9, the rotation axis of the opening and closing plate 13 is perpendicular to the rotation axis of the mounting bar 5, an elastic driving member is arranged on the inner wall of the opening 9, the elastic driving member is used to drive the opening and closing plate 13 to rotate in the direction close to the opening 9 to close the opening 9, the elastic driving member includes a torsion spring 15 used to drive the opening and closing plate 13 to rotate in the direction close to the opening 9, the torsion spring 15 is movably sleeved on the rotating shaft 14, one end of the torsion spring 15 is fixedly connected to the inner wall of the opening 9, and the other end is fixedly connected to the opening and closing plate 13. An arc surface is arranged on the side of the opening and closing plate 13 away from the rotating shaft 14, and the arc surface convexly faces the direction away from the rotating shaft 14 to facilitate the rotation of the opening and closing plate 13; a rubber pad 32 is bonded to the arc surface of the opening and closing plate 13 to improve the sealing between the opening and closing plate 13 and the inner wall of the opening 9.

[0048] When the mounting strip 5 drives the drying boxes 6 on both sides to rotate, the drying boxes 6 abut against the opening and closing plates 13 on both sides, and push the opening and closing plates 13 on both sides to rotate in a direction away from the opening 9 to open the opening 9; when the mounting strip 5 drives the drying boxes 6 on both sides to rotate to the desired position, that is, the mounting strip 5 rotates 180°, the drying boxes 6 on both sides are no longer abutted against the opening and closing plates 13. At this time, the torsion spring 15 drives the opening and closing plates 13 to rotate in the direction of the opening 9 until the opening 9 is closed, so as to ensure the temperature in the drying box 4 and the drying effect of the drying box 6.

[0049] Reference Figure 1 An air storage tank 25 and a cold dryer 26 are arranged in the machine room 1. The air outlet port of the positive and negative pressure screw pump 2 is connected to the air inlet port of the air storage tank 25 by a connecting pipe 27. A check valve 28 is arranged on the connecting pipe 27. The air outlet port of the air storage tank 25 is connected to the input end of the cold dryer 26; the output end of the cold dryer 26 is connected to an air distribution rod 29; the output end of the air distribution rod 29 extends to the outside of the machine room 1, and one end of the air distribution rod 29 outside the machine room 1 is connected to a plurality of air distribution branch pipes 30, which are used to be connected to the printing equipment. A decompression valve 31 is installed on the air distribution branch pipe 30 to facilitate adjusting the air pressure to the air pressure value adapted to the corresponding printing equipment.

[0050] The air compressed by the positive and negative pressure screw pump 2 enters the air storage tank 25. The compressed air from the air storage tank 25 is further dried and cooled by the cold dryer 26, and then enters the air distribution rod 29, and then supplies air to the corresponding printing equipment through each air distribution branch pipe 30.

[0051] The implementation principle of the embodiment of the present application is as follows: when working, the air entering from the air inlet 3 passes through the two drying boxes 6, and the desiccant in the drying boxes 6 dehumidifies and dries the air, providing dry air for the positive and negative pressure screw pumps 2; a large amount of waste heat is generated when the positive and negative pressure screw pumps 2 are working, and the hot air enters the heat exhaust pipe 11, and the inside of the drying box 4 is heated through the heat exhaust pipe 11, thereby drying the desiccant in the drying boxes 6 in the drying box 4; at the same time, the hot air in the heat exhaust pipe 11 drives the fan blades 101 to rotate, and the setting of the deceleration ring 24 enables the fan blades 101 to drive the first transmission rod 1021 to rotate slowly, and the two mounting bars are driven by the transmission member 102. 5 is intermittently rotated, and the rotation time of the two mounting strips 5 is different. Each time the mounting strip 5 rotates 180°, when the mounting strip 5 drives the corresponding drying box 6 to rotate, the drying box 6 pushes the opening and closing plate 13 to rotate in the direction away from the opening 9, so that the opening 9 is opened, so that the mounting strip 5 drives the corresponding two drying boxes 6 to dry in turn. After the mounting strip 5 drives the drying strips on both sides to rotate 180°, the torsion spring 15 drives the opening and closing plate 13 to rotate in the direction close to the opening 9 until the opening 9 is closed; so as to ensure the dehumidification effect of the drying box 6, realize the utilization of the waste heat of the air supply equipment, reduce the heat waste and provide dry air for the positive and negative pressure screw pumps 2.

[0052] During the drying process of the drying box 6 in the drying box 4, the moisture in the desiccant evaporates, and the water droplets drip into the collecting tank 17 along the water guide plate 16, and are finally discharged from the drain pipe 18 to the water storage tank 19. The hot air in the heat exhaust pipe 11 heats the water in the water storage tank 19, and the waste heat generated by the air supply equipment is further utilized to open and close the water outlet pipe 21 by controlling the valve 22, so that it can be used as needed.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A positive and negative pressure centralized air supply system, comprising a machine room (1) and a positive and negative pressure screw pump (2) arranged in the machine room (1), characterized in that: The machine room (1) is provided with an air inlet (3), a drying box (4) is provided in the machine room (1), a mounting strip (5) is rotatably provided in the drying box (4), drying boxes (6) with a drying type desiccant inside are provided on both sides of the mounting strip (5), a plurality of air holes (7) are provided through the drying box (6), the plane where the air inlet (3) is located is parallel to the plane where the drying box (6) is located, the drying box (6) on one side of the mounting strip (5) is located inside the drying box (4), and the drying box (6) on the other side is located outside the drying box (4), the drying box (6) located outside the drying box (4) is used to shield the air inlet (3), the drying box (4) is provided with a through hole (8) for the drying box (6) on one side to pass through, the drying box (4) is provided with an opening (9) for the drying box (6) to rotate, the opening (9) is communicated with the through hole (8), the drying box ( 4) is provided with a driving assembly (10) for driving the mounting bar (5) to rotate, the heat exhaust port of the positive and negative pressure screw pump (2) is connected to a heat exhaust pipe (11), the heat exhaust pipe (11) is wound on the outer wall of the drying box (4), and one end of the heat exhaust pipe (11) away from the positive and negative pressure screw pump (2) extends to the outside of the machine room (1), two mounting bars (5) are provided, the arrangement direction of the two mounting bars (5) is parallel to the rotation axis of the mounting bar (5), and the rotation axis of the mounting bar (5) is parallel to the depth direction of the air inlet (3), the driving assembly (10) includes a fan blade (101) rotatably arranged in the heat exhaust pipe (11) and a transmission member (102) arranged on the drying box (4), the rotation axis of the fan blade (101) is parallel to the rotation axis of the mounting bar (5), and the transmission member (102) is used to drive the two mounting bars (5) to rotate at different times when the fan blade (101) rotates.

2. A positive and negative pressure centralized air supply system according to claim 1, characterized in that: The mounting bar (5) is provided with a rotating rod (12), the rotating rod (12) is rotatably mounted on the drying box (4), the rotating rod (12) on one mounting bar (5) is movably mounted on the rotating rod (12) of another mounting bar (5), the transmission member (102) comprises a first transmission rod (1021), a second transmission rod (1022), a first gear (1023), a second gear (1024), a third gear (1025) and a fourth gear (1026), the first transmission rod (1021) is provided on the fan blade (101), the first transmission rod (1021) is rotatably mounted on the heat exhaust pipe (11), the first gear (1023) is mounted on one end of the first transmission rod (1021) located outside the heat exhaust pipe (11), the second transmission rod (1022) is rotatably mounted on the drying box (4), and the rotation axis of the second transmission rod (1022) is parallel to the fan blade (101). The second gear (1024) is sleeved on the second transmission rod (1022), the second gear (1024) is meshed with the first gear (1023), the first gear (1023) is half-toothed, the third gear (1025) and the rotating rod (12) correspond one to one, the third gear (1025) is sleeved on the corresponding rotating rod (12), the fourth gear (1026) and the third gear (1025) correspond one to one, the fourth gear (1026) is sleeved on the second transmission rod (1022), the fourth gear (1026) is meshed with the corresponding third gear (1025), the fourth gear (1026) is half-toothed, the number of teeth of the fourth gear (1026) is half of the number of teeth of the corresponding third gear (1025), and the tooth segments of the two fourth gears (1026) are arranged in different directions.

3. A positive and negative pressure centralized air supply system according to claim 1, characterized in that: An opening and closing plate (13) for opening and closing the opening (9) is hingedly connected to the inner wall of the opening (9); the rotation axis of the opening and closing plate (13) is perpendicular to the rotation axis of the mounting strip (5); an elastic driving member is arranged on the inner wall of the opening (9); the elastic driving member is used to drive the opening and closing plate (13) to rotate in a direction close to the opening (9) so as to close the opening (9).

4. A positive and negative pressure centralized air supply system according to claim 3, characterized in that: The opening and closing plate (13) is provided with a rotating shaft (14), and the rotating shaft (14) rotates on the inner wall of the opening (9). The elastic driving member includes a torsion spring (15) for driving the opening and closing plate (13) to rotate in a direction close to the opening (9). The torsion spring (15) is movably sleeved on the rotating shaft (14), and one end of the torsion spring (15) is arranged on the inner wall of the opening (9), and the other end is arranged on the opening and closing plate (13).

5. A positive and negative pressure centralized air supply system according to any one of claims 1 to 4, characterized in that: The top wall of the drying box (4) is provided with two water guide plates (16), and the distance between the two water guide plates (16) increases towards the direction approaching the drying box (6).

6. A positive and negative pressure centralized air supply system according to claim 5, characterized in that: A collecting trough (17) is provided in the drying box (4), and the collecting trough (17) is located below the two water guide plates (16). A drainage pipe (18) is connected to the collecting trough (17), and the drainage pipe (18) runs through the drying box (4) and the machine room (1).

7. A positive and negative pressure centralized air supply system according to claim 6, characterized in that: A water storage tank (19) is arranged outside the machine room (1), the drainage pipe (18) is connected to the water storage tank (19), one end of the heat exhaust pipe (11) away from the positive and negative pressure screw pumps (2) is wound around the outer wall of the water storage tank (19), the water storage tank (19) is connected to a water inlet pipe (20), the water storage tank (19) is connected to a water outlet pipe (21), and a control valve (22) is arranged on the water outlet pipe (21).

8. A positive and negative pressure centralized air supply system according to any one of claims 1 to 4, characterized in that: Four guide plates (23) are arranged on the inner wall of the machine room (1), and two opposite guide plates (23) are located on both sides of the drying box (6).

9. A positive and negative pressure centralized air supply system according to claim 2, characterized in that: The heat exhaust pipe (11) is provided with a deceleration ring (24), the first transmission rod (1021) rotates in the deceleration ring (24), and the deceleration ring (24) and the first transmission rod (1021) are in abutment with each other.

Images