Telescopic airway device

Abstract

The present invention relates to the technical field of gas suction pipeline mechanical equipment, and discloses a telescopic airway device, comprising an upper frame and a lower frame. A pressure cylinder is mounted on the upper surface of the upper frame, and the piston rod of the pressure cylinder downwardly passes through the upper frame. The lower end of the piston rod is connected to a movable mold platform, and an air cavity is provided below the movable mold platform. A telescopic airway is mounted on the movable mold platform, and a valve is installed on the telescopic airway near the movable mold platform. A cylinder body is mounted on the upper frame, and the upper end of the telescopic airway passes through the cylinder body, and the lower end of the telescopic airway is connected to the air cavity. The upper end of the cylinder body is connected to an air source. The pressure cylinder drives the movable mold platform to rise and fall, driving the telescopic airway to extend and retract within the cylinder body, thereby changing the upper and lower positions of the air cavity. The present invention uses two telescopic airways for blowing and suction, and has good sealing performance, a smooth channel, few elbows, and a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of gas suction pipeline mechanical equipment, and in particular to a telescopic airway device. Background Art

[0002] In general, when we use pipe connections to blow or suck gas, we often use the hose 100 connection method, and add a drag chain to the outside to play a supporting role or tie it with a cable tie (see the attached Figure 13 The advantage of this is that it is easy to achieve the blowing and suction requirements at room temperature, but the disadvantage is that it takes up a lot of space, and when encountering high-temperature gas, the hose has a short service life, is prone to air leakage, is difficult to replace, and has messy pipelines.

[0003] Although stainless steel hoses can withstand high temperatures, the corrugated channels inside them are not smooth enough. If the gas or liquid passing through contains fibers or dust, long-term use will leave dirt. In addition, stainless steel hoses are not as flexible as plastic hoses, which may lead to rupture or leakage. They cannot be used for a long time and need to be replaced and cleaned regularly.

[0004] Another way is to use a stainless steel hard pipe 200 connection (see attached Figure 14 While aesthetically pleasing and space-saving, this hinged telescopic structure has numerous elbows and significant pressure loss. High machining precision is required, making it difficult to maintain geometric tolerances. Seals are prone to air leakage, requiring frequent seal replacement and resulting in high maintenance costs.

[0005] Pulp molding requires both vacuum extraction and compressed air blowing to dry and transfer products. Currently, the industry often combines these two processes through a main pipeline, then controls them independently with two valves. This is theoretically feasible, but in practice, it's been found that when the vacuum is turned off and compressed air is blown again, cross-talk often occurs, resulting in slow response times. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems and provide a telescopic airway device that uses two telescopic airways for blowing and suction, has good sealing, smooth channels, few elbows and long service life.

[0007] The telescopic airway device of the present invention is introduced based on the pulp molding hot pressing process, but its application is not limited to the pulp molding hot pressing station. Similar pipeline designs that need to extract or blow gas or liquid under linear motion can all apply the technical solution of the present invention.

[0008] The technical solution adopted by the present invention is:

[0009] A telescopic air duct device, characterized in that it comprises an upper frame and a lower frame, a pressure cylinder is installed on the upper surface of the upper frame, the piston rod of the pressure cylinder passes downward through the upper frame, the lower end of the piston rod is connected to the movable mold table, an air cavity is arranged below the movable mold table, a telescopic air duct is installed on the movable mold table, a valve is installed on the telescopic air duct close to the movable mold table, a cylinder body is installed on the upper frame, the upper end of the telescopic air duct is passed through the cylinder body, the lower end of the telescopic air duct is connected to the air cavity, the upper end of the cylinder body is connected to an air source, the pressure cylinder drives the movable mold table to rise and fall, and drives the telescopic air duct to extend and retract in the cylinder body, so that the air cavity can change its upper and lower positions.

[0010] Furthermore, the telescopic airway is a multi-section knotted structure.

[0011] Furthermore, two guide pillars are symmetrically arranged on the front and rear sides of the telescopic air duct. The cylinder body, telescopic air duct and guide pillars form a telescopic air duct assembly. The lower end of the guide pillar is fixed on the movable mold table, and the upper end of the guide pillar passes through the upper frame, and a linear bearing is arranged between the guide pillar and the upper frame.

[0012] Furthermore, there are two telescopic air channel components, which are symmetrically arranged on the left and right sides of the pressure cylinder piston rod, and each telescopic air channel component is connected to its own air cavity.

[0013] Furthermore, the cylinder bodies of the two telescopic airway assemblies are respectively connected to a pressure air source and a vacuum source, respectively providing compressed air blowing and vacuum suction for the two telescopic airways.

[0014] Furthermore, two small cylinders are installed on the upper frames on both sides of the pressure cylinder, the piston rods of the small cylinders are connected to the movable mold table, and the small cylinders are supplied with air by an air storage tank.

[0015] Furthermore, the cylinder body includes a cylinder barrel and end covers arranged at both ends of the cylinder barrel, the end covers are fastened by multiple stud bolts, a buffer pad is arranged between the cylinder barrel and the end covers, a piston head is arranged at the upper end of the telescopic air duct, the piston head slides with the upper wall of the cylinder body, a shaft sealing ring is sleeved on the piston head, the lower end cover of the cylinder body slides with the outer wall of the telescopic air duct, a hole sealing ring is arranged in the lower end cover, and the shaft sealing ring and the hole sealing ring are both Gray rings.

[0016] Furthermore, a guide ring is provided between the piston head and the inner wall of the cylinder body, and a dust ring is provided between the lower end of the lower end cover and the telescopic air channel.

[0017] Furthermore, the upper end cover of the cylinder body is connected to an upper flange, the upper flange is connected to the air source pipeline, the lower end of the telescopic air duct is connected to a lower flange, the lower flange is connected to a valve, and the valve is an angle seat valve.

[0018] Furthermore, a guide column protective cover is provided above the linear bearing, a pipe bracket is installed between the pipe connecting the air source and the top plate, a support frame is provided between the cylinder body and the top plate, and an anti-collision pad is installed on the top of the movable mold table.

[0019] The beneficial effects of the present invention are:

[0020] (1) The use of telescopic air duct is safe, stable and not prone to leakage, the pipe layout is beautiful and has a long service life;

[0021] (2) Fast response, smooth pipeline, few elbows and small pressure loss;

[0022] (3) The airway has high straightness when it is extended and retracted, and it will not be blocked or stuck;

[0023] (4) Use with angle seat valve, resistant to high temperature and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attachment Figure 1 is a cross-sectional view of the guide post position of the present invention;

[0025] Attachment Figure 2 yes Figure 1 A partial enlarged view of middle A;

[0026] Attachment Figure 3 yes Figure 1 A partial enlarged view of the position of the middle movable mold table;

[0027] Attachment Figure 4 is a cross-sectional view of the location of the telescopic airway of the present invention;

[0028] Attachment Figure 5 It is attached Figure 4 A partial enlarged view of B in the middle;

[0029] Attachment Figure 6 It is attached Figure 4 A partial enlarged view of the position of the middle movable mold table;

[0030] Attachment Figure 7 is a schematic top view of the present invention;

[0031] Attachment Figure 8 It is a schematic cross-sectional view of the cylinder body;

[0032] Attachment Figure 9 It is attached Figure 8 A partial enlarged view of center C;

[0033] Attachment Figure 10 It is attached Figure 8 A partial enlarged view of middle D;

[0034] Attachment Figure 11 This is the installation diagram of the connection between the cylinder body and the gas source pipeline;

[0035] Attachment Figure 12 It is a schematic diagram of the contraction state of the telescopic airway;

[0036] Attachment Figure 13 It is a structural diagram of the hose connection method;

[0037] Attachment Figure 14 It is a structural diagram of the stainless steel rigid pipe connection method.

[0038] The reference numerals in the accompanying drawings are:

[0039] 1. Telescopic airway device; 2. Upper frame;

[0040] 3. Lower frame; 4. Pull rod;

[0041] 5. Guide shaft support; 6. Lower locking nut;

[0042] 7. Adjust the nut; 8. Tighten the lock nut;

[0043] 9. Pressure cylinder; 10. Pressure cylinder piston rod;

[0044] 11. Moving mold table; 12. Air cavity;

[0045] 13. Telescopic airway; 14. Cylinder body;

[0046] 15. Blowing and suction installation port; 16. Small cylinder;

[0047] 17. Gas storage tank; 18. Guide column;

[0048] 19. Linear bearing; 20. Throttle valve;

[0049] 21. Cylinder barrel; 22. Stud bolts;

[0050] 23. Buffer pad; 24. O-ring;

[0051] 25. Piston head; 26. Shaft sealing ring;

[0052] 27. Sealing ring for hole; 28. Upper end cover;

[0053] 29. Lower end cover; 30. Guide ring;

[0054] 31. Dust ring; 32. Upper flange;

[0055] 33. Lower flange; 34. Angle seat valve;

[0056] 35.Guide column protective cover; 36.Pipe support;

[0057] 37. Support frame; 38. Anti-collision pad;

[0058] 100. Hose; 200. Stainless steel hard pipe. Implementation Method

[0059] The specific embodiments of the telescopic airway device of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] See attached Figure 1 、 2 The telescopic airway device 1 includes an upper frame 2 and a lower frame 3, which are connected by a tie rod 4. The lower frame is fixed with a guide shaft support 5 and then locked with a lower locking nut 6. After tightening the adjustment nut 7 on the tie rod 4, the upper frame 2 is installed and the upper locking nut 8 is tightened. While tightening the upper locking nut 8, the horizontality of the upper frame 2 and the lower frame 3 is adjusted. The height between the upper frame 2 and the lower frame 3 can be set as needed.

[0061] See attached Figure 3 、 6 A pressure cylinder 9 is installed on the upper frame 2. The pressure cylinder 9 uses compressed air as power. The pressure cylinder piston rod 10 passes downward through the upper frame 2. The lower end of the pressure cylinder piston rod 10 is installed on the movable mold table 11. An air cavity 12 is set below the movable mold table 11. A telescopic air duct 13 is installed on the movable mold table 11. A cylinder body 14 is installed on the upper frame 2. The upper end of the telescopic air duct 13 is passed through the cylinder body 14. A valve is installed on the telescopic air duct 13 near the movable mold table 11. The lower end of the telescopic air duct 13 is connected to the air cavity 12. A blowing and suction installation port 15 is set below the air cavity 12.

[0062] See attached Figure 7 Two small air cylinders 16 are mounted on the upper frame 2 on either side of the pressure cylinder 9. The piston rods of the small air cylinders 16 are connected to the movable die table 11. The small air cylinders 16 are connected to an air tank 17, which assists in lifting the pressure cylinder 9 and thereby reduces the bore of the pressure cylinder 9. Furthermore, when the pressure cylinder 9 drives the movable die table 11 downward, it creates resistance to its descent, thereby reducing the problem of rapid descent caused by the excessive weight of the movable die table 11.

[0063] A throttle valve 20 is installed on the air inlet and outlet of the small cylinder 16 to control the lifting speed of the piston rod of the small cylinder 16, thereby driving the slow rise and fall of the movable mold table 11 to ensure that the telescopic air channel 13 is smooth when extending and retracting.

[0064] The upper end of the cylinder 14 is connected to an air source. If pressure blowing is used, the air source is a pressure air source, and if air extraction is used, the air source is a vacuum source. The pressure cylinder 9 drives the movable mold table 11 up and down, driving the telescopic air channel 13 to expand and contract within the cylinder 14, causing the air cavity 12 to change its vertical position.

[0065] As needed, the telescopic air duct 13 can also be a multi-section knotted structure. Adding two to three knotted structures can greatly increase the telescopic distance and meet the blowing and suction gas requirements at different heights and distances.

[0066] See attached Figure 2 、 4 Two guide columns 18 are symmetrically arranged on the front and rear sides of the telescopic air duct 13. The cylinder body 14, the telescopic air duct 13 and the guide columns 18 form a telescopic air duct assembly. The lower end of the guide column 18 is fixed on the movable mold table 11, and the upper end of the guide column 18 passes through the upper frame 2. A linear bearing 19 is set between the upper frame 2.

[0067] The straightness of the guide column 18 can ensure the accuracy of the up and down movement of the pressure cylinder 9 and the telescopic airway 13, prevent the suffocation and jamming caused by poor verticality, and improve the service life of the seal and the pressure cylinder 9 pressure cylinder piston rod 10.

[0068] See attached Figure 7 There are two telescopic airway components, which are symmetrically arranged on the left and right sides of the pressure cylinder piston rod 10, and each telescopic airway component is connected to its own air cavity 12. The two telescopic airways 13 are respectively connected to the pressure air source and the vacuum source to realize the functions of blowing and exhausting respectively.

[0069] The four guide posts 18 of the two telescopic airway assemblies are connected to form a rectangle with the same or similar straightness, ensuring smoothness when the four guide posts 18 move up and down.

[0070] In addition to being arranged vertically, the upper frame 2 and lower frame 3 can also be arranged horizontally without affecting the air extraction and blowing operations. In the description of this application, the directions or positional relationships indicated by "up, down, front, back, left, and right" are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not necessarily indicate that the equipment components must have a specific direction.

[0071] See attached Figure 8 、 9 10. The cylinder body 14 comprises a cylinder barrel 21 and upper and lower end caps 28 and 29 at either end. Multiple stud bolts 22 secure the end caps together. A cushion 23 and an O-ring 24 are positioned between the barrel 21 and the end caps. The O-ring 24 ensures airtightness, while the cushion 23 prevents the telescopic airway 13 from rising or descending too quickly. A piston head 25 is positioned at the upper end of the telescopic airway 13. During installation, the piston head 25 is directly inserted into the cylinder barrel 21, then the stud bolts 22 are inserted and tightened with nuts.

[0072] The piston head 25 slides against the inner wall of the cylinder body 14. A shaft sealing ring 26 is sleeved on the piston head 25. The lower end cap 29 of the cylinder body 14 slides against the outer wall of the telescopic airway 13. A hole sealing ring 27 is located within the lower end cap 29. Both the shaft sealing ring 26 and the hole sealing ring 27 are Gly rings, ensuring the sealing performance of the end caps. A guide ring 30 is provided between the piston head 25 and the inner wall of the cylinder body 14. A dust ring 31 is provided between the lower end of the lower end cap 29 and the telescopic airway 13 to prevent dust from entering the cylinder barrel 21.

[0073] The Gly ring achieves better sealing performance. A guide ring 30 is installed on each side of the Gly ring, which ensures both the sealing and the guiding performance between the piston head 25 and the cylinder body 14 of the telescopic air channel 13.

[0074] See attached Figure 6 、 11 The upper end cover 28 of the cylinder body 14 is connected to the upper flange 32, the upper flange 32 is connected to the flange on the air source pipeline, the lower end of the telescopic air duct 13 is connected to the lower flange 33, and the lower flange 33 is connected to the flange of the angle seat valve 34. The angle seat valve 34 is selected on the telescopic air duct 13, which is not only resistant to high temperatures, but also can well realize the switching operation when there is dust or fiber in the telescopic air duct 13. The service life is three to five times longer than that of a general switch valve.

[0075] See attached Figure 1 、 4 12. A guide post guard 35 is installed above the linear bearing 19 to prevent the guide post 18 from extending and injuring maintenance personnel during operation. A pipe bracket 36 is installed between the air supply pipe and the upper frame 2. A support frame 37 is installed between the cylinder body 14 and the upper frame 2 to support and protect the pipe, ensure smooth ascent, and prevent the cylinder barrel 21 from tilting. A crash pad 38 is installed on the top of the movable mold table 11 to prevent collision with the upper frame 2 when rising to the top.

[0076] The above are only preferred embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A telescopic airway device, characterized in that: The machine comprises an upper frame and a lower frame, a pressure cylinder is installed on the upper surface of the upper frame, a piston rod of the pressure cylinder passes through the upper frame downward, the lower end of the piston rod is connected to the movable mold table, an air cavity is arranged below the movable mold table, a telescopic air channel is installed on the movable mold table, a valve is installed on the telescopic air channel close to the movable mold table, a cylinder body is installed on the upper frame, the upper end of the telescopic air channel is passed through the cylinder body, the lower end of the telescopic air channel is connected to the air cavity, the upper end of the cylinder body is connected to the air source, and the pressure cylinder drives the movable mold table to rise and fall, with The dynamic telescopic air duct is telescopic in the cylinder body, so that the air cavity can change its upper and lower position. The cylinder body includes a cylinder barrel and end covers arranged at both ends of the cylinder barrel. The end covers are fastened by multiple stud bolts. A buffer pad is arranged between the cylinder barrel and the end covers. A piston head is arranged at the upper end of the telescopic air duct. The piston head slides with the inner wall of the cylinder body. A shaft sealing ring is sleeved on the piston head. The lower end cover of the cylinder body slides with the outer wall of the telescopic air duct. A hole sealing ring is arranged in the lower end cover. The shaft sealing ring and the hole sealing ring are both Gray rings.

2. The telescopic airway device according to claim 1, characterized in that: The telescopic airway is a multi-section knotted structure.

3. The telescopic airway device according to claim 1, characterized in that: Two guide pillars are symmetrically arranged on the front and rear sides of the telescopic air duct. The cylinder body, telescopic air duct and guide pillars form a telescopic air duct assembly. The lower end of the guide pillar is fixed on the movable mold table, and the upper end of the guide pillar passes through the upper frame. A linear bearing is arranged between the guide pillar and the upper frame.

4. The telescopic airway device according to claim 3, characterized in that: There are two telescopic airway components, which are symmetrically arranged on the left and right sides of the pressure cylinder piston rod, and each telescopic airway component is connected to its own air cavity.

5. The telescopic airway device according to claim 4, characterized in that: The cylinder bodies of the two telescopic airway assemblies are respectively connected to a pressure air source and a vacuum source, respectively providing compressed air blowing and vacuum suction for the two telescopic airways.

6. The telescopic airway device according to claim 5, characterized in that: Two small cylinders are installed on the upper frames on both sides of the pressure cylinder. The piston rods of the small cylinders are connected to the movable mold table. The small cylinders are supplied with air by an air storage tank.

7. The telescopic airway device according to claim 1, characterized in that: A guide ring is provided between the piston head and the inner wall of the cylinder body, and a dust ring is provided between the lower end of the lower end cover and the telescopic air channel.

8. The telescopic airway device according to claim 1, characterized in that: The upper end cover of the cylinder body is connected to an upper flange, which is connected to an air source pipeline. The lower end of the telescopic air channel is connected to a lower flange, which is connected to a valve, which is an angle seat valve.

9. The telescopic airway device according to claim 3, characterized in that: A guide column protective cover is provided above the linear bearing, a pipe bracket is installed between the pipe connected to the air source and the top plate, a support frame is provided between the cylinder body and the top plate, and an anti-collision pad is installed on the top of the movable mold table.

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