Telescopic expansion sealing device

Abstract

The utility model belongs to the technical field of telescopic expansion sealing, and particularly relates to a telescopic expansion sealing device which comprises an inner sleeve, an outer sleeve and a positioning flange, the inner sleeve is slidably sleeved with the outer sleeve, the outer sleeve is provided with an upper flange and a lower flange, and the positioning flange is arranged in the height direction of the inner sleeve, provided with a hollow portion and fixedly arranged on the outer sleeve. A non-metal sealing ring is arranged between the outer sleeve and the inner sleeve, and a guide belt with an open belt-shaped annular ring is embedded between the inner sleeve and the outer sleeve. The device is simple in structure, connection between the movable device interface and different device interfaces is rapidly achieved, the device adapts to different distances within the telescopic range, meanwhile, after the movable device interface and the fixed device interface are in butt joint, the air bag can be rapidly expanded under the driving of compressed air, and the device is convenient to use. Therefore, a controllable and repairable flexible seal is formed between the mobile equipment interface and the fixed equipment interface, so that a closed guarantee is provided for closed pipeline transportation, and convenience is provided for people to use.

Description

Technical Field

[0001] This utility model relates to the field of telescopic expansion sealing technology, and in particular to a telescopic expansion sealing device. Background Technology

[0002] With the rapid development of industrial automation, a large number of bulk granular and powder materials are gradually changing from the past extensive storage mode such as open-air stacking and warehouse stacking. Through large-capacity silos and automated closed pipeline conveying, the fully automated storage and closed conveying of dispersed granular and powder materials are realized. The conveying of closed dispersed granular and powder materials includes, but is not limited to, gravity conveying, mechanical bolt conveying, rotary feeder valve conveying, vacuum conveying, positive pressure pneumatic conveying, and other technologies, either individually or in combination.

[0003] In existing technologies, the engineering of combined applications often involves a large number of unavoidable conveying pipelines, temporary storage tanks, and silo pumps, which are inefficient. This not only occupies a lot of production space but also increases the engineering investment in industrial automation, especially in the fine chemical industry, where there are many small-scale feeding of dispersed particles and powders and personalized packaging of solid dispersed particles and powders.

[0004] Therefore, a telescopic expansion sealing device is needed to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where the engineering of combined applications often involves a large number of unavoidable conveying pipelines, temporary storage tanks, and silo pumps, which have low efficiency. This not only occupies a large amount of production space but also increases the engineering investment in industrial automation. In particular, the fine chemical industry suffers from the disadvantages of small-scale feeding of large quantities of dispersed particles and powders and the personalized packaging of solid dispersed particles and powder products. Therefore, this invention proposes a telescopic expansion sealing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A telescopic expansion sealing device, comprising:

[0008] The inner sleeve has an outer sleeve with upper and lower flanges slidably fitted on it, and a positioning flange fixed on the outer sleeve along the height direction of the inner sleeve and having a hollow portion. A non-metallic sealing ring is provided between the outer sleeve and the inner sleeve, and a guide strip with an open strip-shaped annular ring is embedded between the inner sleeve and the outer sleeve.

[0009] An inner pressure ring is fixed to the top of the inner sleeve, and an expansion air bladder is variably disposed on the outer periphery of the inner pressure ring. An outer pressure ring for fixing the expansion air bladder is disposed on the outer periphery of the expansion air bladder. A fixed flange and a movable joint movably connected to the fixed flange are fixed to the bottom of the outer pressure ring. An air nozzle is disposed between the movable joint and the expansion air bladder. The air nozzle can be connected to a pneumatic pipeline to inflate and deflate the expansion air bladder.

[0010] Furthermore, the bottom of the movable joint is threadedly connected to an adjusting rod and a cylinder threadedly connected to the adjusting rod and located on the outer periphery of the outer sleeve.

[0011] Furthermore, the cylinder is fixedly mounted with an mounting plate and a fixed crossbar that is fixedly connected to the outer sleeve.

[0012] Furthermore, a hexagonal adjusting screw and a cylindrical spring slidably disposed on the side of the adjusting screw near the outer sleeve are inserted into the hollow part of the positioning flange.

[0013] Furthermore, one end of the cylindrical spring is provided with a positioning block that fits against the inner sleeve. The positioning block is inserted into the positioning hole of the positioning flange and pushed from the outside to the inside of the inner sleeve under the elastic action of the cylindrical spring, so as to adjust the movement direction of the inner sleeve and have a guiding function.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. This solution establishes a telescopic pipe with long telescopic function between the movable equipment pipe and the fixed equipment pipe through the setting of inner and outer sleeves. It can not only quickly connect the movable equipment interface to different fixed equipment interfaces, but also adapt to different distances within the telescopic range.

[0016] 2. After the inflatable airbag in this solution is connected to the mobile device interface and the fixed device interface, it can rapidly expand under the drive of compressed air, thereby forming a controllable and repairable flexible seal between the mobile device interface and the fixed device interface, thus providing a tight seal for closed pipeline transportation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a telescopic expansion sealing device proposed in this utility model;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of a telescopic expansion sealing device proposed in this utility model;

[0020] Figure 3 This utility model proposes a telescopic expansion sealing device. Figure 2 Enlarged diagram of part A in the diagram;

[0021] Figure 4 This is a top view of the telescopic expansion sealing device proposed in this utility model.

[0022] The correspondence between the numbers in the attached diagram is as follows:

[0023] 1. Inner sleeve; 2. Outer sleeve; 3. Cylinder; 4. Adjusting rod; 5. Movable joint; 6. Fixed flange; 7. Outer pressure ring; 8. Inflation air bladder; 9. Inner pressure ring; 10. Guide belt; 11. Fixed crossbar; 12. Mounting plate; 13. Positioning block; 14. Cylindrical spring; 15. Adjusting screw; 16. Positioning flange; 17. Sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-4 A telescopic expansion sealing device, comprising:

[0026] Inner sleeve 1, outer sleeve 2 with upper and lower flanges and positioning flange 16 fixed on outer sleeve 2 along the height direction of inner sleeve 1 and having a hollow part are slidably sleeved on inner sleeve 1, non-metallic sealing ring 17 is provided between outer sleeve 2 and inner sleeve 1, and guide band 10 with open strip-shaped annular ring is embedded between inner sleeve 1 and outer sleeve 2. The guide band 10 is provided to guide as inner sleeve 1 is sleeved into outer sleeve 2.

[0027] An inner pressure ring 9 is fixed to the top of the inner sleeve 1, and an expansion air bladder 8 is variably arranged on the outer periphery of the inner pressure ring 9. An outer pressure ring 7 for fixing the expansion air bladder 8 is arranged on the outer periphery of the expansion air bladder 8. A fixed flange 6 and a movable joint 5 movably connected to the fixed flange 6 are fixed to the bottom of the outer pressure ring 7. An air nozzle is arranged between the movable joint and the expansion air bladder 8.

[0028] In this embodiment, the bottom of the movable joint 5 is threadedly connected to an adjusting rod 4 and a cylinder 3 threadedly connected to the adjusting rod 4 and located on the outer periphery of the outer sleeve 2. The distance between the piston rod of the cylinder 3 and the movable joint 5 is adjusted by adjusting the length of the threaded connection at both ends. The hollow air nozzle can be connected to a pneumatic pipeline to inflate and deflate the inflatable airbag 8.

[0029] In this embodiment, the cylinder 3 is fixedly mounted with an mounting plate 12 and a fixed crossbar 11 that is fixedly connected to the outer sleeve 2.

[0030] In this embodiment, a hexagonal adjusting screw 15 and a cylindrical spring 14 slidably disposed on the side of the adjusting screw 15 near the outer sleeve 2 are inserted into the hollow part of the positioning flange 16. The positioning flange 16 can position the cylindrical spring 14 in the positioning hole.

[0031] In this embodiment, one end of the cylindrical spring 14 is provided with a positioning block 13 that fits against the inner sleeve 1. The cylindrical spring 14 presses the alloy steel ball of the positioning block 13 from the outside to the inside against the outer wall of the inner sleeve 1.

[0032] The implementation principle of the telescopic expansion sealing device in this application embodiment is as follows: The device is moved to the required position, the end flange of the inner sleeve 1 is aligned with the flange of the outlet of the hopper (or other equipment to be connected), and then the device is fixed. Compressed air is simultaneously injected into the rodless chamber of the cylinder 3 through the device control program. The piston rod of the cylinder 3 extends and pushes the adjusting rod 4 connected to it. The adjusting rod 4 pushes the movable joint 5 connected to it. The two symmetrical movable joints 5 simultaneously lift the back of the flat flange of the inner sleeve 1, stretching the entire inner sleeve 1 upward along the inner wall of the outer sleeve 2. Under the combined action of the multiple evenly distributed elastic positioning mechanisms composed of the positioning block 13, cylindrical spring 14, and adjusting bolt in the positioning hole of the positioning flange 16, and the guide belt 10, the extension movement of the inner sleeve 1 and the outer sleeve 2 are always kept in the same axial direction. Moreover, due to the rolling and self-lubrication of the guide block and the self-lubrication of the guide belt 10, the extension and contraction process is kept smooth. The device control program outputs a signal. After the electrical and pneumatic signals are converted, controlled compressed air is output, thereby controlling the output stroke and torque of cylinder 3. This, in turn, controls the distance and thrust of the inner sleeve 1 extending from the outer sleeve 2, so that the flat flange of the inner sleeve 1 and the outer pressure ring 7, expansion seal ring 17, and inner pressure ring 9 installed on its end face are pressed against the flange of the pipe or container to be connected, completing a rigid connection. After the rigid connection with the flange to be connected is completed under the action of the control program, another stream of compressed air enters from the air nozzle of the expansion seal and inflates the expansion seal from the inside out. As the compressed air pressure increases, the expansion seal wall undergoes axial expansion displacement due to the restriction of the inner pressure ring 9 and the outer pressure ring 7, creating an annular gap seal on the end face. Due to the internal air pressure and the flexible rubber properties of the expansion seal ring 17, it can forcibly fill any uneven gaps that may exist between the flat flange of the inner sleeve 1 and the flange to be connected. At the same time, the pressure that this seal can withstand and the maximum gap that can be compensated can be adjusted by controlling the compressed air pressure input into the expansion seal.

[0033] All structures in this application can be customized in terms of material and length according to actual usage. The attached drawings are schematic structural diagrams, and the actual dimensions can be adjusted accordingly.

[0034] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A telescopic expansion seal apparatus, characterized by, The utility model relates to a kind of telescopic antenna, including: Inner sleeve, the outer sleeve with upper and lower flange is slidably sleeved on the inner sleeve, and positioning flange is fixed on the outer sleeve along the height direction of the inner sleeve and has hollow part, non-metallic sealing ring is arranged between the outer sleeve and the inner sleeve, and guide belt with open belt annular ring is embedded between the inner sleeve and the outer sleeve; Inner pressure ring, the top of the inner sleeve is fixed, and inflatable air bag is arranged in deformable mode on the outer periphery of the inner pressure ring, outer pressure ring is arranged on the outer periphery of the inflatable air bag for fixing the inflatable air bag, the bottom of the outer pressure ring is fixed with fixed flange, and movable joint is movably connected with the fixed flange, and air cock is arranged between the movable joint and the inflatable air bag.

2. A telescopic expansion sealing device according to claim 1, wherein, The bottom of the movable joint is threadedly connected with adjusting rod, and air cylinder is threadedly connected with the adjusting rod and located on the outer periphery of the outer sleeve.

3. A telescopic expansion seal as claimed in claim 2, wherein, Mounting plate is fixedly installed on the air cylinder, and fixed crosspiece is fixedly connected with the outer sleeve.

4. A telescopic expansion seal as defined in claim 1, wherein, The hollow part of the positioning flange is inserted with hexagonal adjusting screw, and cylindrical spring is slidably arranged on the side of the adjusting screw close to the outer sleeve.

5. A telescopic expansion seal as claimed in claim 4, wherein, One end of the cylindrical spring is provided with positioning block matched with the inner sleeve.

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