Large-diameter powder conveying rotary seal structure

Abstract

The utility model discloses a kind of large-diameter powder conveying rotary sealing structures, it is related to rotary drum dryer technical field, and the purpose is to prolong the use cycle of friction sealing block.The main technical scheme of the utility model is as follows: large-diameter powder conveying rotary sealing structure, the structure includes: feed cylinder, moving ring seat, static ring seat and compression mechanism;The import of feed cylinder corresponds to rotary drum, and the periphery of feed cylinder is uniformly distributed with multiple axial guide rails;Moving ring seat is fixedly connected to the import of rotary drum;The inner edge of static ring seat is connected to the shaft side of feed cylinder by soft connecting piece, and the circumference of static ring seat is uniformly distributed with multiple guide wheels, and each guide wheel is arranged in one of the axial guide rails, and the side surface of static ring seat towards moving ring seat is connected to friction sealing ring block, and the solid part of static ring seat is provided with radial air passage, and the outlet of radial air passage corresponds to friction sealing ring block;Compression mechanism is arranged between moving ring seat and static ring seat, for making friction sealing ring block stable contact moving ring seat.

Description

Technical Field

[0001] This utility model relates to the field of rotary dryer technology, and in particular to a rotary sealing structure for conveying large-diameter powder. Background Technology

[0002] The rotary dryer includes a rotary drum, a feed cylinder, a motor, a discharge cylinder, and a support structure. The rotary drum is equipped with gears and rollers; two rollers are arranged on either side of the gears, and thrust wheels and their supports are located at the bottom of the rollers. The gears are connected to the output gear of the motor. The feed cylinder is located at the top of the rotary drum and extends obliquely inside the bottom of the drum. The motor is located below the rotary drum.

[0003] Existing rotary sealing devices for large-diameter powder conveying, such as rotary dryers, involve the rotating ring of the device contacting the friction sealing block. However, the high temperature of the material reduces the durability of the friction sealing block, resulting in a short service life. Utility Model Content

[0004] In view of this, the present invention provides a large-diameter powder conveying rotary sealing structure, the main purpose of which is to extend the service life of the friction sealing block.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model embodiment provides a large-diameter powder conveying rotary sealing structure, which includes: a feed cylinder, a dynamic ring seat, a static ring seat, and a clamping mechanism;

[0007] The feed cylinder corresponds to the inlet of the rotary drum, and multiple axial guide rails are evenly distributed around the periphery of the feed cylinder.

[0008] The moving ring seat is fixedly connected to the inlet of the rotating drum;

[0009] The inner edge of the stationary ring seat is connected to the shaft side of the feed cylinder via a flexible connector. Multiple guide wheels are evenly distributed around the periphery of the stationary ring seat. Each guide wheel is rotatably disposed in one of the shaft guide rails. The side of the stationary ring seat facing the moving ring seat is connected to the friction sealing ring block. The solid part of the stationary ring seat is provided with a radial venting channel. The outlet of the radial venting channel corresponds to the friction sealing ring block.

[0010] The clamping mechanism is disposed between the moving ring seat and the stationary ring seat, and is used to ensure that the friction sealing ring block is stably in contact with the moving ring seat.

[0011] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0012] Optionally, the friction sealing ring block is provided with a through channel, one end of which corresponds to the outlet of the radial vent channel, and the other end corresponds to the moving ring seat.

[0013] Optionally, the friction sealing ring block is connected to the stationary ring seat by screws.

[0014] Optionally, the friction sealing ring block has a groove on one side facing the moving ring seat, and the end drive head of the screw is located in the groove.

[0015] Optionally, the clamping mechanism includes an annular plate and multiple clamping components. The annular plate includes a first plate surface and a second plate surface that are perpendicular to each other. Each clamping component includes a tensioning shaft, a spring, and a roller. One end of the tensioning shaft is connected to the stationary ring seat, and the other end passes through the first plate surface and is connected to the retaining ring. The spring is sleeved on the tensioning shaft between the first plate surface and the retaining ring. The axle of the roller is connected to the second plate surface, and the edge of the roller contacts the moving ring seat.

[0016] Optionally, it also includes a guide tube, the end face of which is fixedly connected to the first plate surface, the tensioning shaft is slidably connected to the guide tube, and the spring is sequentially sleeved on the guide tube and the tensioning shaft.

[0017] Optionally, the feed cylinder is fixedly connected to the annular mounting plate on its axial side, one end of the flexible connector is bolted to the annular mounting plate, and the other end of the flexible connector is bolted to the stationary ring seat.

[0018] Optionally, the number of axial guide rails and the number of guide wheels are both two, and the two axial guide rails are respectively fixedly arranged on the left and right sides of the feed cylinder.

[0019] By employing the above technical solution, this utility model has at least the following advantages:

[0020] During the rotation of the drum, multiple guide wheels around the stationary ring seat can roll along the axial guide rails. At the same time, multiple axial guide rails provide support for the stationary ring seat through the wheel axles of the guide wheels, making the stationary ring seat and the moving ring seat concentric, thereby making the friction sealing ring block and the moving ring seat concentric. Meanwhile, the feed cylinder is connected to the stationary ring seat through a flexible connector, releasing the structural stress between the stationary ring seat and the feed cylinder.

[0021] Based on the above, the moving ring seat rotates with the rotating drum, and the moving ring seat and the friction sealing ring block come into contact and slide against each other. At the same time, the external cooling air flows to the friction sealing ring block through the radial ventilation channel, reducing the temperature of the friction sealing ring block, avoiding wear and tear on the friction sealing ring block due to long-term contact with high-temperature materials, and extending the service life of the friction sealing ring block. Attached Figure Description

[0022] Figure 1 A schematic diagram of a large-diameter powder conveying rotary sealing structure provided for an embodiment of this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of section A;

[0024] Figure 3 for Figure 2 Enlarged view of section B.

[0025] The reference numerals in the accompanying drawings include: feed cylinder 1, moving ring seat 2, stationary ring seat 3, rotating drum 4, axial guide rail 5, flexible connector 6, guide wheel 7, friction sealing ring block 8, radial venting channel 9, through channel 10, screw 11, annular plate 12, first plate surface 1201, second plate surface 1202, tensioning shaft 13, spring 14, roller 15, first nut 16, second nut 17, retaining ring 18, guide tube 19, and annular mounting plate 20. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this utility model provides a large-diameter powder conveying rotary sealing structure, which includes: a feed cylinder 1, a moving ring seat 2, a stationary ring seat 3, and a pressing mechanism;

[0029] The feed cylinder 1 corresponds to the inlet of the rotating cylinder 4, and multiple axial guide rails 5 are evenly distributed around the periphery of the feed cylinder 1.

[0030] The moving ring seat 2 is fixedly connected to the inlet of the rotating drum 4;

[0031] The inner edge of the stationary ring seat 3 is connected to the axial side of the feed cylinder 1 via a flexible connector 6. Multiple guide wheels 7 are evenly distributed around the periphery of the stationary ring seat 3. Each guide wheel 7 is rotatably disposed in one of the axial guide rails 5. The side of the stationary ring seat 3 facing the moving ring seat 2 is connected to the friction sealing ring block 8. The solid part of the stationary ring seat 3 is provided with a radial venting channel 9. The outlet of the radial venting channel 9 corresponds to the friction sealing ring block 8.

[0032] The clamping mechanism is disposed between the moving ring seat 2 and the stationary ring seat 3, and is used to ensure that the friction sealing ring block 8 is in stable contact with the moving ring seat 2.

[0033] The working process of the large-diameter powder conveying rotary seal structure is as follows:

[0034] During the rotation of the rotating drum 4, multiple guide wheels 7 around the periphery of the stationary ring seat 3 can roll along the axial guide rail 5. At the same time, the multiple axial guide rail 5 provide support for the stationary ring seat 3 through the wheel axle of the guide wheel 7, making the stationary ring seat 3 and the moving ring seat 2 concentric, thereby making the friction sealing ring block 8 and the moving ring seat 2 concentric. Meanwhile, the feed cylinder 1 is connected to the stationary ring seat 3 through the flexible connector 6, releasing the structural stress between the stationary ring seat 3 and the feed cylinder 1.

[0035] Based on the above, the moving ring seat 2 rotates with the rotating drum 4, and the moving ring seat 2 and the friction sealing ring block 8 come into contact and slide against each other. At the same time, the external cooling air flows to the friction sealing ring block 8 through the radial ventilation channel 9, which reduces the temperature of the friction sealing ring block 8, prevents the friction sealing ring block 8 from being damaged due to long-term contact with high-temperature materials, and extends the service life of the friction sealing ring block 8.

[0036] Specifically, the friction sealing ring 8 is made of PTFE gasket material.

[0037] Specifically, the axial guide rail 5 is fixedly installed on the frame of the rotary drum 4 dryer, and the axial direction of the axial guide rail 5 is parallel to the axial direction of the rotary drum 4.

[0038] Specifically, the axle of the guide wheel 7 is fixedly welded to the periphery of the stationary ring seat 3. The axial guide rail 5 is grooved, and the guide wheel 7 is embedded in the groove. The guide wheel 7 contacts the opposite side wall of the groove, restricting the movement direction of the stationary ring seat 3 to the axial direction of the rotating drum 4, thereby ensuring the coaxiality of the stationary ring seat 3 and the moving ring seat 2.

[0039] Specifically, the flexible connector 6 is made of P84 filter bag material, which provides conditions for stress release of the static ring seat 3.

[0040] Specifically, the inlet of the radial vent 9 is connected to the compressed air pipe to guide compressed air to the radial vent 9.

[0041] Specifically, the feed cylinder 1 extends a certain length into the rotating drum 4 to prevent material from scattering onto the inner surface of the flexible connector 6.

[0042] In a specific embodiment, the friction sealing ring block 8 is provided with a through hole 10, one end of which corresponds to the outlet of the radial venting channel 9, and the other end corresponds to the moving ring seat 2.

[0043] In this embodiment, specifically, during the operation of the rotary drum 4 dryer, external cooling air flows sequentially through the radial ventilation channel 9 and the through channel 10, reaching the contact surface of the friction sealing ring block 8 and the moving ring seat 2, directly reducing the frictional heat generation of the contact surface. At the same time, the cooling air and the high-temperature gas material flowing to the contact surface exchange heat, reducing the wear rate of the friction sealing ring block 8 and extending its service life.

[0044] Specifically, external cooling air reaches the contact surface between the friction sealing ring block 8 and the moving ring seat 2, forming an air seal.

[0045] In a specific embodiment, the friction sealing ring block 8 is connected to the stationary ring seat 3 by screws 11.

[0046] In this embodiment, specifically, the friction sealing ring block 8 is connected to the stationary ring seat 3 by screws 11, which facilitates the disassembly and replacement of the friction sealing ring block 8.

[0047] In a specific embodiment, the friction sealing ring block 8 has a groove on one side facing the moving ring seat 2, and the end drive head of the screw 11 is located in the groove.

[0048] In this embodiment, specifically, a flat washer is present between the end drive head of the screw 11 and the solid part of the friction sealing ring block 8. After the screw 11 is tightened, the end drive head of the screw 11 presses the solid part of the friction sealing ring block 8 against the stationary ring seat 3 through the flat washer. At the same time, the end drive head of the screw 11 is located in the groove to avoid sliding friction between the end drive head of the screw 11 and the moving ring seat 2.

[0049] In a specific embodiment, the clamping mechanism includes an annular plate 12 and multiple clamping components. The annular plate 12 includes a first plate surface 1201 and a second plate surface 1202 that are perpendicular to each other. Each clamping component includes a tensioning shaft 13, a spring 14, and a roller 15. One end of the tensioning shaft 13 is connected to the stationary ring seat 3, and the other end passes through the first plate surface 1201 and is connected to the retaining ring 18. The spring 14 is sleeved on the tensioning shaft 13 between the first plate surface 1201 and the retaining ring 18. The axle of the roller 15 is connected to the second plate surface 1202, and the edge of the roller 15 contacts the moving ring seat 2.

[0050] In this embodiment, specifically, the tensioning shaft 13 adopts a double-ended bolt. One end of the tensioning shaft 13 is tightened and installed on the stationary ring seat 3 by the first nut 16, and the other end of the tensioning shaft 13 is tightened by the second nut 17, thereby pressing the spring 14 against the retaining ring 18. During the rotation of the rotating drum 4, the spring 14 releases elastic potential energy, driving the roller 15 to press against the moving ring seat 2, thereby dynamically controlling the distance between the stationary ring seat 3 and the moving ring seat 2.

[0051] Specifically, the tensioning shaft 13 uses double-ended bolts, which makes disassembly and assembly simple.

[0052] Specifically, in the circumferential direction of the annular plate 12, the distance between two adjacent pressing components is 300mm, ensuring that the moving ring seat 2 and the friction sealing ring block 8 are in uniform and tight contact, thus ensuring the sealing effect.

[0053] In a specific embodiment, a guide tube 19 is also included. The end face of the guide tube 19 is fixedly connected to the first plate surface 1201. The tensioning shaft 13 is slidably connected to the guide tube 19. The spring 14 is sequentially sleeved on the guide tube 19 and the tensioning shaft 13.

[0054] In this embodiment, specifically, the end face of the guide tube 19 is fixedly welded to the first plate surface 1201, the tensioning shaft 13 passes through the first plate surface 1201 and is slidably connected to the guide tube 19, stabilizing the vertical relationship between the tensioning shaft 13 and the first plate surface 1201, and finally making the rollers 15 of multiple tensioning components synchronously contact the moving ring seat 2, so that the extrusion pressure on different positions of the friction sealing ring block 8 is relatively consistent.

[0055] In a specific embodiment, the feed cylinder 1 is fixedly connected to the annular mounting plate 20 on its axial side, one end of the flexible connector 6 is connected to the annular mounting plate 20 by bolts, and the other end of the flexible connector 6 is connected to the stationary ring seat 3 by bolts.

[0056] In this embodiment, specifically, the inner edge of the annular mounting plate 20 is fixedly welded to the axial side of the feed cylinder 1, and the two ends of the flexible connector 6 are bent outward. The bent part of one end is connected to the annular mounting plate 20 by bolts, and the bent part of the other end is connected to the stationary ring seat 3 by bolts, which facilitates the disassembly and replacement of the flexible connector 6.

[0057] In a specific embodiment, there are two axial guide rails 5 and two guide wheels 7, and the two axial guide rails 5 are respectively fixedly arranged on the left and right sides of the feed cylinder 1.

[0058] In this embodiment, specifically, two axial guide rails 5 are fixedly installed on the frame on the left and right sides of the feed cylinder 1, and two guide wheels 7 are symmetrically arranged on the left and right sides of the stationary ring seat 3. Each guide wheel 7 rolls and overlaps one of the axial guide rails 5. The two axial guide rails 5 bear the weight of the stationary ring seat 3 evenly, and at the same time, facilitate the axial displacement of the stationary ring seat 3 to release structural stress.

[0059] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A rotary sealing structure for conveying large-diameter powder materials, characterized in that, include: The feed cylinder corresponds to the inlet of the rotary drum, and multiple axial guide rails are evenly distributed around the periphery of the feed cylinder. A rotating ring seat, which is fixedly connected to the inlet of the rotating drum; A stationary ring seat has its inner edge connected to the shaft side of the feed cylinder via a flexible connector. Multiple guide wheels are evenly distributed around the periphery of the stationary ring seat, each guide wheel rolling within one of the shaft guide rails. The side of the stationary ring seat facing the moving ring seat is connected to a friction sealing ring block. The solid portion of the stationary ring seat has radial venting channels, the outlet of which corresponds to the friction sealing ring block. A clamping mechanism is provided between the moving ring seat and the stationary ring seat to ensure that the friction sealing ring block is stably in contact with the moving ring seat.

2. The large-diameter powder conveying rotary sealing structure according to claim 1, characterized in that, The friction sealing ring block is provided with a through hole, one end of which corresponds to the outlet of the radial venting channel, and the other end corresponds to the moving ring seat.

3. The large-diameter powder conveying rotary sealing structure according to claim 1, characterized in that, The friction sealing ring block is connected to the stationary ring seat by screws.

4. The large-diameter powder conveying rotary sealing structure according to claim 3, characterized in that, The friction sealing ring block has a groove on one side facing the moving ring seat, and the end drive head of the screw is located in the groove.

5. The large-diameter powder conveying rotary sealing structure according to claim 1, characterized in that, The clamping mechanism includes an annular plate and multiple clamping components. The annular plate includes a first plate surface and a second plate surface that are perpendicular to each other. Each clamping component includes a tensioning shaft, a spring, and a roller. One end of the tensioning shaft is connected to the stationary ring seat, and the other end passes through the first plate surface and is connected to a retaining ring. The spring is sleeved on the tensioning shaft between the first plate surface and the retaining ring. The axle of the roller is connected to the second plate surface, and the edge of the roller contacts the moving ring seat.

6. The large-diameter powder conveying rotary sealing structure according to claim 5, characterized in that, It also includes a guide tube, the end face of which is fixedly connected to the first plate surface, the tensioning shaft is slidably connected to the guide tube, and the spring is sequentially sleeved on the guide tube and the tensioning shaft.

7. The large-diameter powder conveying rotary sealing structure according to claim 1, characterized in that, The feed cylinder is fixedly connected to the annular mounting plate on its axial side. One end of the flexible connector is connected to the annular mounting plate by bolts, and the other end of the flexible connector is connected to the stationary ring seat by bolts.

8. The large-diameter powder conveying rotary sealing structure according to claim 1, characterized in that, The number of axial guide rails and the number of guide wheels are both two, and the two axial guide rails are respectively fixedly installed on the left and right sides of the feed cylinder.

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