Semi-resistance type pressure relief ventilation cap of air cushion machine

Abstract

A semi-resistance type pressure relief ventilation cap of an air cushion machine relates to the field of machinery and comprises a bottom plate, an air inlet is formed in the middle of the bottom plate, an annular cylinder is formed on the periphery of the bottom plate, a filter screen is arranged on the inner wall of the annular cylinder, a guide column is arranged at the bottom of the filter screen, and a lifting sleeve is arranged outside the guide column in a sliding fit mode. A conical plugging block is installed at the bottom of the lifting sleeve and matched with the air inlet. By means of the ingenious design, the air pressure in the air tank of the air cushion conveyor is successfully adjusted, the problems of tail turbulent flow and dust raising caused by too high air pressure are solved, therefore, the cleanness of the working environment is maintained, pollution to the surrounding environment is reduced, and due to the unique arrangement of the conical rain-proof cap, the safety of the air cushion conveyor is improved. And external rainwater and impurities are effectively prevented from entering, so that the durability of the equipment is remarkably improved, and the operation safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically, to a semi-resistance pressure relief and ventilation cap for air cushion machines. Background Technology

[0002] In the daily operation and production of ports, air cushion machines are a key component, and the air pressure inside their chambers is often higher than the external ambient pressure. This pressure difference can, under certain circumstances, especially when disturbed by external airflow, lead to material dust being stirred up in the tail area of ​​the air cushion machine. This not only negatively impacts the port's environmental quality but also poses significant challenges to the port's clean production and overall operational efficiency.

[0003] Chinese patent CN202704381U discloses an adjustable venting device for an air cushion belt conveyor. The initial design intent of this device was to release gas from the air tank by rotating a handle, thereby reducing or eliminating belt drift. However, this device has certain limitations in practical applications. Since its operation relies primarily on manual intervention, it is difficult for operators to precisely control the valve opening. This can lead to excessively low pressure in the air cushion layer, consequently affecting the stability and normal operation of the conveyor.

[0004] Therefore, although existing adjustable venting devices can alleviate the problem of dust emission from the tail of air cushion machines to some extent, their operation and control precision still need improvement. To solve this problem more effectively, it is necessary to develop a new type of pressure relief vent cap or other automated, precisely controlled venting device to ensure that the air cushion machine can operate stably and efficiently while maintaining a suitable air pressure range. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background art, and to propose a semi-resistance pressure relief and ventilation cap for air cushion machines.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A semi-resistance pressure relief vent cap for an air cushion machine includes a base plate with an air inlet in the center. An annular cylinder is formed around the base plate, and a filter screen is provided on the inner wall of the annular cylinder. A guide post is provided at the bottom of the filter screen, and a lifting sleeve is slidably fitted to the guide post. A conical sealing block is installed at the bottom of the lifting sleeve, and the conical sealing block cooperates with the air inlet.

[0008] Furthermore, the filter screen is provided with a plurality of filter holes.

[0009] Furthermore, a connecting rod is provided on the outer wall of the annular cylinder, and a conical rain cap is installed on the connecting rod.

[0010] Furthermore, the conical rain cap is positioned directly above the annular cylinder.

[0011] Furthermore, an installation ring is provided on the outer side of the lifting sleeve, and a flexible spring is provided between the installation ring and the filter screen.

[0012] Furthermore, the flexible spring is sleeved on the guide post.

[0013] Furthermore, the lifting sleeve is provided with a guide hole in the middle to accommodate the insertion of the guide post.

[0014] Furthermore, the end of the guide post penetrates the filter screen, and the end of the guide post is provided with an external thread. An upper fastening nut and a lower fastening nut are connected to the upper thread of the external thread, and the upper fastening nut and the lower fastening nut are respectively located on both sides of the filter screen.

[0015] Furthermore, a limiting frame is installed on the inner wall of the annular cylinder, which can restrict the vertical movement of the conical sealing block.

[0016] Furthermore, the limiting frame includes a central limiting ring located between the mounting ring and the filter screen. The limiting frame also includes a connecting rod connected to an arc-shaped plate, which is fixedly connected to the inner wall of the annular cylinder by bolts.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: Through its ingenious design, this invention successfully regulates the air pressure inside the air cushion conveyor's air box, avoiding tail turbulence and dust problems caused by excessive air pressure, thereby maintaining a clean working environment and reducing pollution to the surrounding environment. This improvement not only optimizes the performance of the air cushion conveyor but also provides strong support for creating more environmentally friendly and efficient working conditions. Furthermore, the unique conical rain cap design effectively blocks the entry of external rainwater and impurities, significantly improving the equipment's durability and ensuring safe operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the usage state of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the limit frame structure;

[0023] The components include: 1. Frame, 11. Vertical rod, 12. Connecting plate, 13. Sealing cover, 2. Return roller, 3. Air box, 4. Conveyor belt, 6. Air cushion machine semi-resistance pressure relief vent cap, 61. Base plate, 62. Air inlet, 63. Annular cylinder, 64. Filter screen, 641. Filter hole, 65. Guide column, 651. Upper fastening nut, 652. Lower fastening nut, 66. Lifting sleeve, 67. Mounting ring, 68. Flexible spring, 69. Conical sealing block, 610. Guide hole, 611. Connecting rod, 612. Conical rain cap, 613. Center limit ring, 614. Connecting rod, 615. Arc plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0025] like Figures 1-5 As shown, a semi-resistance pressure relief vent cap 6 for an air cushion machine is installed on an air cushion conveyor. The air cushion conveyor includes a frame 1, which includes vertical rods 11. Return rollers 2 and air boxes 3 are installed on multiple vertical rods. A conveyor belt 4 is supported above the air boxes. A sealing cover 13 is provided on the top of the frame, and the semi-resistance pressure relief vent cap is installed on the sealing cover.

[0026] Furthermore, a connecting plate 12 is provided between the two vertical rods, and two support plates are provided on the connecting plate. A rotating shaft is installed between the two support plates, and a return roller 2 is rotatably connected to the rotating shaft.

[0027] A semi-resistance pressure relief vent cap for an air cushion machine includes a base plate 61 with an air inlet 62 in the center. An annular cylinder 63 is formed around the base plate, and a filter screen 64 is located on the inner wall of the annular cylinder 63. A guide post 65 is located at the bottom of the filter screen, and a lifting sleeve 66 is slidably fitted onto the guide post. A conical sealing block 69 is installed at the bottom of the lifting sleeve. The conical sealing block cooperates with the air inlet to seal it. This structural design allows the conical sealing block to automatically seal or open the air inlet according to changes in air pressure, effectively regulating the internal air pressure of the air cushion machine and protecting it from damage caused by excessively high air pressure.

[0028] Furthermore, the filter screen is provided with a plurality of filter holes 641. These filter holes can prevent external impurities from entering the air cushion machine, ensuring the normal operation of the air cushion machine and extending its service life.

[0029] Furthermore, a connecting rod 611 is provided on the outer wall of the annular cylinder, and a conical rain cap 612 is installed on the connecting rod. The conical rain cap can effectively prevent rainwater and other external liquids from entering the interior of the annular cylinder, further protecting the air cushion machine from damage.

[0030] In a more detailed design, the conical rain cap is positioned directly above the annular cylinder. This positional relationship allows the conical rain cap to better cover the annular cylinder, improving its rainproof performance.

[0031] Furthermore, an installation ring 67 is provided on the outer side of the lifting sleeve, and a flexible spring 68 is provided between the installation ring and the filter screen. The flexible spring can buffer the air pressure changes and protect the lifting sleeve and the conical sealing block from excessive impact.

[0032] Furthermore, the flexible spring is sleeved on the guide post. This structure allows the flexible spring to work more stably while preventing the spring from tilting or twisting.

[0033] In a more detailed design, the lifting sleeve is provided with a guide hole 610 in the middle to accommodate the insertion of a guide post. The guide hole ensures that the lifting sleeve remains stable during movement and does not deviate from the trajectory of the guide post.

[0034] In at least one embodiment, such as Figure 3 As shown, the end of the guide post penetrates the filter screen, and the end of the guide post is provided with an external thread. The upper fastening nut 651 and the lower fastening nut 652 are connected to the upper thread of the external thread. The upper fastening nut 651 and the lower fastening nut 652 are respectively located on both sides of the filter screen.

[0035] In at least one embodiment, a limiting frame is installed on the inner wall of the annular cylinder, the limiting frame being able to restrict the vertical movement of the conical sealing block.

[0036] Furthermore, the limiting frame includes a central limiting ring 613, which is located between the mounting ring and the filter screen.

[0037] Furthermore, the limiting frame also includes a connecting rod 614, which is connected to an arc-shaped plate 615. The arc-shaped plate is fixedly connected to the inner wall of the annular cylinder by bolts. This structure allows the limiting frame to be more securely installed on the inner wall of the annular cylinder, while ensuring that the vertical movement range of the conical sealing block is precisely limited, further improving the safety and stability of the air cushion machine.

[0038] In operation, install the semi-resistance pressure relief vent cap onto the sealing cover of the air cushion conveyor, ensuring that the frame, vertical rods, return rollers, air box, and other components of the air cushion conveyor are correctly installed and in working condition. Connect the base plate of the semi-resistance pressure relief vent cap to the air box, ensuring a secure connection and preventing air leakage. Check and ensure that the conical rainproof cap of the semi-resistance pressure relief vent cap is directly above the annular cylinder to provide rain protection.

[0039] When the air cushion conveyor is operating, the air box generates a certain amount of air pressure, lifting the conveyor belt and creating an air cushion effect, reducing friction between the conveyor belt and the frame. When the air pressure inside the air box is too high, the pressure enters the annular cylinder through the inlet of the semi-resistance pressure relief vent cap. At this time, the conical sealing block moves upward under the action of air pressure, separating from the inlet, thus achieving the pressure relief function. After entering the annular cylinder, the gas is filtered through the filter holes on the filter screen to prevent impurities from entering the air box and ensure the normal operation of the air cushion conveyor. The filtered gas is discharged through the gap between the annular cylinder and the conical rainproof cap, while the conical rainproof cap prevents rainwater and other external impurities from entering the annular cylinder. When the air pressure inside the air box returns to normal, the conical sealing block moves downward under the action of the flexible spring, re-sealing the inlet to prevent external impurities from entering the air box.

[0040] Precautions: Regularly check the filter screen of the semi-resistance pressure relief vent cap for blockage. If blockage is found, clean or replace it promptly. Check the flexible spring for damage or failure; replace it immediately if damaged. Regularly check and tighten all connecting parts to ensure a secure connection without leaks or loosening.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A semi-resistance pressure relief vent cap for an air cushion machine, characterized in that, It includes a base plate with an air inlet in the center and an annular cylinder formed around the base plate. The inner wall of the annular cylinder has a filter screen and a guide post at the bottom of the filter screen. A lifting sleeve is slidably fitted to the guide post and a conical sealing block is installed at the bottom of the lifting sleeve. The conical sealing block cooperates with the air inlet.

2. The semi-resistance pressure relief vent cap for an air cushion machine according to claim 1, characterized in that, The filter screen has several filter holes.

3. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 1 or 2, characterized in that, A connecting rod is provided on the outer wall of the annular cylinder, and a conical rain cap is installed on the connecting rod.

4. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 3, characterized in that, The conical rain cap is positioned directly above the annular cylinder.

5. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 1, characterized in that, The lifting sleeve is provided with an installation ring on its outer side, and a flexible spring is provided between the installation ring and the filter screen.

6. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 5, characterized in that, The flexible spring is sleeved on the guide post.

7. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 1, characterized in that, The lifting sleeve has a guide hole in the middle to accommodate the insertion of a guide post.

8. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 6, characterized in that, The end of the guide post penetrates the filter screen, and the end of the guide post is provided with an external thread. An upper fastening nut and a lower fastening nut are connected to the upper thread of the external thread, and the upper fastening nut and the lower fastening nut are respectively located on both sides of the filter screen.

9. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 8, characterized in that, A limiting frame is installed on the inner wall of the annular cylinder, which can restrict the vertical movement of the conical sealing block.

10. A semi-resistance pressure relief vent cap for an air cushion machine according to claim 9, characterized in that, The limiting frame includes a central limiting ring located between the mounting ring and the filter screen. The limiting frame also includes a connecting rod connected to an arc-shaped plate, which is fixedly connected to the inner wall of the annular cylinder by bolts.

Images