Sealing device for furnace end of rotary drying equipment
By setting a combined structure of air pressure seals, spiral seals, mechanical seals and sealing fillers between the furnace body and the air intake cover of the rotary drying equipment, the problem of insufficient sealing of existing equipment is solved, and effective sealing of materials and gases in the equipment is achieved, ensuring the normal operation and safety of the equipment.
Patent Information
- Application Number
- CN202421514813.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The sealing structure of existing rotary drying equipment is poorly sealed and cannot completely avoid leakage of materials and gases, affecting the normal operation of the equipment and posing a potential hazard to the staff.
The combined structure of air pressure seals, spiral seals, mechanical seals and sealing fillers is adopted to ensure that the dynamic and static bonding surfaces of the furnace body and the air intake cover are fully sealed. An opening is provided in the middle of the air pressure seal to communicate with the inside of the air intake cover to prevent gas leakage by using air pressure.
It effectively avoids leakage of materials and gases, ensures good sealing of the equipment, avoids hazards to staff and the environment, and ensures the normal operation of the equipment.
Smart Images
Figure CN222837315U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of drying equipment, and in particular relates to a sealing device for a furnace head of a rotary drying equipment. Background Art
[0002] In the process of material drying in rotary drying equipment, it is usually necessary to seal the materials and reactants in the furnace. In some scenarios with strict sealing requirements, not only the materials but also the gases generated by the physical or chemical reactions of the materials in the furnace must be sealed. Once these materials or gases leak, it will affect the normal operation of the equipment and even cause harm to the staff in serious cases.
[0003] At present, the common sealing structure mainly adopts a combined sealing structure of a small pitch push-forward spiral and a sealing packing to achieve the sealing of the dynamic and static joint surfaces. However, this sealing structure has poor sealing performance and cannot completely avoid the leakage of materials and gases. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art methods, the purpose of the utility model is to provide a sealing device for the furnace head of a rotary drying equipment, which can ensure that the materials in the rotary drying equipment and the gas generated by the reaction of the materials will not leak.
[0005] To achieve the above purpose, the utility model adopts a technical solution: a sealing device for a furnace head of a rotary drying equipment, comprising: a gas pressure seal, the gas pressure seal is arranged between the joint surface of the furnace body and the air inlet hood;
[0006] An opening is arranged in the middle of the air pressure seal, and the opening is communicated with the interior of the air intake hood.
[0007] Furthermore, the pneumatic seal adopts an annular structure, the opening of which is arranged in the middle of the annular structure and communicates with the inside of the air intake hood to achieve all-round sealing.
[0008] Furthermore, the cross section of the pneumatic seal is in an I-shape, and the pneumatic seal is arranged in a groove on the outer wall of the air intake hood to enhance the sealing effect.
[0009] Furthermore, a spiral seal is also included, which is arranged between the joint surface of the furnace body and the air inlet hood to enhance the sealing effect.
[0010] Furthermore, the spiral seal adopts a pushing spiral member, which is spirally wound around the outer wall of the air inlet hood and connected to the furnace body. When the furnace body and the air inlet hood rotate relative to each other, the pushing spiral member pushes the material toward the furnace body.
[0011] Furthermore, it also includes a mechanical seal, which is arranged on the air intake hood and connects the furnace body with the outer wall of the air intake hood to enhance the sealing effect.
[0012] Furthermore, the mechanical seal comprises a dynamic sealing ring and a static sealing ring, the dynamic sealing ring is connected to the furnace body, the static sealing ring is connected to a static sealing ring bracket, and the static sealing ring bracket is fixed to the outer wall of the air inlet hood.
[0013] Furthermore, a clamping device is movably provided on the static sealing ring bracket, one end of the clamping device is fixedly connected to the sealing bracket, and the sealing bracket is arranged on the outer wall of the air intake hood.
[0014] Furthermore, the clamping device includes a clamping screw, one end of which passes through the static sealing ring bracket and the other end is fixedly connected to the sealing bracket. A spring is provided on the clamping screw, and spring covers are provided at both ends of the spring. A clamping nut is provided on the clamping screw, and the clamping nut is placed on one side of the spring cover.
[0015] Furthermore, an oil groove is provided between the dynamic seal ring and the static seal ring, and a lubricating oil pipe is provided on the static seal ring to communicate with the oil groove. The oil groove is filled with grease through the lubricating oil pipe, and a dense oil film is formed on the dynamic and static sealing surfaces. The oil film not only lubricates the entire sealing surface, but also prevents any gas from leaking from here. The lubricating oil pipe enters the sealing surface from the static sealing side, and the grease is regularly added to avoid dry grinding of the sealing surface.
[0016] Furthermore, a sealing filler is arranged under the static sealing ring bracket to enhance the sealing effect.
[0017] Furthermore, a sealing packing pressure plate is fixedly installed below the static sealing ring bracket, the sealing packing is arranged between the sealing packing pressure plate and the air intake cover, a clamping head for limiting the movement of the sealing packing is provided on the sealing packing pressure plate, and a packing gland is provided on one side of the sealing packing.
[0018] Furthermore, at least one flexible joint is provided between the sealing filler pressing plate and the sealing bracket, and the function of the flexible joint is to adjust the axial thermal expansion displacement of the furnace body, so as to ensure that the axial expansion and contraction of the furnace body during heating and cooling will not cause damage to the equipment.
[0019] Furthermore, the flexible joint is U-shaped, with both ends connected to the vertical plate.
[0020] The beneficial effects of adopting this technical solution are:
[0021] (1) The utility model is based on the fact that the dynamic and static joint surface between the furnace body and the air inlet hood is the sealing surface, and a sealing component is provided on the sealing surface to ensure that the sealing surface does not leak material or gas when the equipment is operating normally.
[0022] (2) The utility model uses a pneumatic seal between the joint surface of the furnace body and the air inlet hood, and uses an opening in the middle of the pneumatic seal to communicate with the interior of the air inlet hood. When facing positive pressure, the internal gas of the furnace body is easy to leak. Therefore, the use of the above-mentioned pneumatic seal proposed by the utility model can effectively avoid the leakage of internal reaction gas, prevent the gas from endangering the health of personnel and polluting the surrounding environment, and ensure that the equipment is well sealed and can operate normally.
[0023] (3) The utility model further combines a spiral seal, a mechanical seal and a packing seal on the basis of setting a pneumatic seal between the joint surface of the furnace body and the air inlet hood, so as to achieve a better sealing effect and ensure that the equipment has no leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of a sealing device for a furnace head of a rotary drying equipment according to the utility model;
[0025] Figure 2 This is a schematic diagram of the installation of the sealing device of the utility model in a rotary drying equipment.
[0026] Among them, air intake hood -1, sealing bracket -2, clamping screw -3, spring -33, spring cover -32, clamping nut -31, flexible joint -4, vertical plate -41, packing gland -5, static sealing ring bracket -6, static sealing ring -7, sealing packing -8, sealing packing pressure plate -81, clamp -82, lubricating oil pipe -9, inside of air intake hood -10, pneumatic seal -11, spiral seal -12, furnace body -13, dynamic sealing ring -14, feed screw -15, screw conveyor -16. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described below with reference to the accompanying drawings.
[0028] like Figure 2 As shown, the feeding system of the ammonium chloride rotary drying equipment has a screw conveyor 16 at the left end, and a feed screw 15 at the center of the screw conveyor 16. The material is conveyed into the furnace body 13 at the right end through the screw rod structure of the feed screw 15. A large number of heating pipelines are arranged in the furnace body 13 to dry the material, and the material is discharged from the discharge end as the furnace body 13 rotates. The outer layer of the feed screw 15 is an air intake hood 1, which is connected to the housing of the screw conveyor 16 through a flange; the air intake hood 1 extends all the way into the furnace body 13, and the dynamic and static joint surface between the furnace body 13 and the air intake hood 1 is a sealing surface, and a sealing device is provided on the sealing surface to ensure that the sealing surface does not leak material or gas when the equipment is in normal operation.
[0029] like Figure 2As shown, the sealing device of the feeding system of the rotary drying equipment of the present invention, the arrow B in the figure shows the flow direction of the sealing gas, and the arrow C shows the leakage direction of the dust and ammonia.
[0030] In this embodiment, see Figure 1-Figure 2 As shown, a sealing device for a furnace head of a rotary drying equipment comprises: a gas pressure seal 11, wherein the gas pressure seal 11 is arranged between the joint surface of a furnace body 13 and an air inlet hood 1;
[0031] The air pressure seal 11 has an opening in the middle, and the opening is communicated with the interior 10 of the air intake cover.
[0032] Preferably, the pneumatic seal 11 adopts an annular structure, and an opening in the middle of the annular structure communicates with the interior 10 of the air intake hood.
[0033] Preferably, the cross section of the air pressure seal 11 is I-shaped, and the air pressure seal 11 is arranged in a groove on the outer wall of the air intake cover 1 .
[0034] As an optimization solution of the above embodiment, a spiral seal 12 is further included, which is arranged between the joint surface of the furnace body 13 and the air intake hood 1 .
[0035] Preferably, the spiral seal 12 is a material pushing spiral, which is spirally wound around the outer wall of the air inlet hood 1 and connected to the furnace body 13 . When the furnace body 13 and the air inlet hood 1 rotate relative to each other, the material pushing spiral pushes the material toward the furnace body 13 .
[0036] As an optimization solution of the above embodiment, it also includes a mechanical seal, which is arranged on the air intake hood 1 and connects the furnace body 13 with the outer wall of the air intake hood 1.
[0037] Preferably, the mechanical seal comprises a dynamic seal ring 14 and a static seal ring 7 , the dynamic seal ring 14 is connected to the furnace body 13 , the static seal ring 7 is connected to a static seal ring bracket 6 , and the static seal ring bracket 6 is fixed to the outer wall of the air inlet hood 1 .
[0038] Preferably, a clamping device is movably provided on the static sealing ring bracket 6 , one end of the clamping device is fixedly connected to the sealing bracket 2 , and the sealing bracket 2 is arranged on the outer wall of the air intake hood 1 .
[0039] The clamping device includes a clamping screw 3, one end of the clamping screw 3 passes through the static sealing ring bracket 6, and the other end is fixedly connected to the sealing bracket 2. A spring 33 is provided on the clamping screw 3, and spring covers 32 are provided at both ends of the spring 33. A clamping nut 31 is provided on the clamping screw 3, which is placed on one side of the spring cover 32.
[0040] Preferably, an oil groove is provided between the dynamic sealing ring 14 and the static sealing ring 7 , and a lubricating oil pipe 9 is provided on the static sealing ring 7 and communicated with the oil groove.
[0041] As an optimization solution of the above embodiment, a sealing filler 8 is arranged under the static sealing ring bracket 6 .
[0042] Preferably, a sealing packing pressure plate 81 is fixedly installed below the static sealing ring bracket 6, the sealing packing 8 is arranged between the sealing packing pressure plate 81 and the air intake cover 1, a clamp 82 for limiting the movement of the sealing packing 8 is provided on the sealing packing pressure plate 81, and a packing gland 5 is provided on one side of the sealing packing 8.
[0043] Preferably, at least one flexible joint 4 is provided between the sealing filler pressing plate 81 and the sealing bracket 2 .
[0044] Preferably, the flexible joint 4 is U-shaped, with both ends connected to the vertical plate 41 .
[0045] In order to better understand the present invention, the working principle of the present invention is described in detail below:
[0046] The air inlet cover 1 is a fixed part, and the sealing bracket 2, the clamping device 3, the flexible joint 4, the packing gland 5, the static sealing ring bracket 6, the static sealing ring 7, the sealing packing 8, the lubricating oil pipe 9, etc. connected thereto are all stationary, that is, they do not rotate with the furnace body. The push screw 12, the furnace body 13, and the dynamic sealing ring 14 are rotating parts, which rotate together with the rotation of the furnace body.
[0047] The air seal ring 11 is in a stationary state under normal conditions, and will rotate slightly under the push of air pressure, which can prevent the accumulation of materials in the sealing surface groove and cause the sealing effect to decrease.
[0048] When the furnace body rotates, the pushing screw 12 rotates with the furnace body, pushing most of the materials toward the furnace body 13, and a small part of the dust mixed with ammonia will continue to move outward. When it reaches the position of the gas sealing ring 11, the sealing gas is clean air with a pressure higher than the pressure in the furnace, and the sealing gas will block the dust and ammonia from leaking out.
[0049] Part of the sealing gas flows to the left side of the gas seal ring 11. The first sealing surface on the left side is the dynamic and static sealing surface, that is, the joint surface between the dynamic sealing ring 14 and the static sealing ring 7. There is an annular oil groove on the sealing surface. The oil groove is filled with grease through the lubricating oil pipe 9 to form a dense oil film on the dynamic and static sealing surfaces. The oil film lubricates the entire sealing surface and prevents any gas from leaking from here. The lubricating oil pipe 9 enters the sealing surface from the static sealing side, and grease is regularly added to avoid dry grinding of the sealing surface.
[0050] The pressing force on the dynamic and static sealing surface formed by the sealing ring 14 and the static sealing ring 7 is adjusted by rotating the clamping nut 31 on the clamping device to adjust the compression amount of the spring 33. The seal between the static sealing ring bracket 6 and the air intake cover 1 is a static seal, and the sealing packing 8 is used for packing sealing.
[0051] The sealing bracket 2 is connected to the static sealing ring bracket 6 through a flexible joint 4. A plurality of flexible joints 4 are provided between the sealing packing pressure plate 81 and the sealing bracket 2, and the flexible joints 4 are U-shaped, and both ends are connected to the vertical plate 41. The function of the flexible joints 4 is to adjust the axial thermal expansion displacement of the furnace body 13 to ensure that the axial expansion and contraction of the furnace body during heating and cooling will not cause damage to the equipment.
[0052] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A sealing device for a furnace head of a rotary drying equipment, characterized in that: include: A pneumatic seal (11), wherein the pneumatic seal (11) is arranged between the joint surface of the furnace body (13) and the air inlet hood (1); The air pressure seal (11) is provided with an opening in the middle, and the opening is communicated with an interior (10) of the air intake cover (1).
2. The sealing device for the furnace head of a rotary drying equipment according to claim 1, characterized in that: The air pressure seal (11) adopts an annular structure, and the opening is arranged in the middle of the annular structure and communicates with the interior (10) of the air intake cover (1).
3. A sealing device for a furnace head of a rotary drying equipment according to claim 1 or 2, characterized in that: The pneumatic seal (11) has an I-shaped cross section and is arranged in a groove on the outer wall of the air intake hood (1).
4. The sealing device for the furnace head of a rotary drying equipment according to claim 1, characterized in that: It also includes a spiral seal (12) which is arranged between the joint surface of the furnace body (13) and the air inlet hood (1).
5. The sealing device for the furnace head of a rotary drying equipment according to claim 4, characterized in that: The spiral seal (12) is a material pushing spiral member, which is spirally wound around the outer wall of the air inlet hood (1) and connected to the furnace body (13). When the furnace body (13) and the air inlet hood (1) rotate relative to each other, the material pushing spiral member pushes the material toward the furnace body (13).
6. The sealing device for the furnace head of a rotary drying equipment according to claim 1, characterized in that: It also comprises a mechanical seal, which is arranged on the air intake hood (1) and connects the furnace body (13) and the outer wall of the air intake hood (1).
7. The sealing device for the furnace head of a rotary drying equipment according to claim 6, characterized in that: The mechanical seal comprises a dynamic seal ring (14) and a static seal ring (7); the dynamic seal ring (14) is connected to the furnace body (13); the static seal ring (7) is connected to a static seal ring bracket (6); and the static seal ring bracket (6) is fixed to the outer wall of the air inlet hood (1).
8. The sealing device for the furnace head of a rotary drying equipment according to claim 7, characterized in that: A clamping device is movably provided on the static sealing ring bracket (6), one end of which is fixedly connected to the sealing bracket (2), and the sealing bracket (2) is arranged on the outer wall of the air intake hood (1).
9. The sealing device for the furnace head of a rotary drying equipment according to claim 8, characterized in that: The clamping device comprises a clamping screw (3), one end of which passes through a static sealing ring bracket (6), and the other end of which is fixedly connected to a sealing bracket (2); a spring (33) is provided on the clamping screw (3), and spring covers (32) are sleeved on both ends of the spring (33); a clamping nut (31) is provided on the clamping screw (3), and the clamping nut (31) is placed on one side of the spring cover (32).
10. A sealing device for a furnace head of a rotary drying equipment according to any one of claims 7 to 9, characterized in that: An oil groove is provided between the dynamic sealing ring (14) and the static sealing ring (7), and a lubricating oil pipe (9) communicating with the oil groove is provided on the static sealing ring (7).
11. A sealing device for a furnace head of a rotary drying equipment according to any one of claims 7 to 9, characterized in that: A sealing filler (8) is arranged under the static sealing ring support (6).
12. The sealing device for the furnace head of a rotary drying equipment according to claim 11, characterized in that: A sealing packing pressure plate (81) is fixedly mounted below the static sealing ring bracket (6); the sealing packing (8) is arranged between the sealing packing pressure plate (81) and the air intake cover (1); a clamping head (82) for limiting the movement of the sealing packing (8) is provided on the sealing packing pressure plate (81); and a packing gland (5) is provided on one side of the sealing packing (8).
13. The sealing device for the furnace head of a rotary drying equipment according to claim 12, characterized in that: At least one flexible joint (4) is provided between the sealing filler pressure plate (81) and the sealing bracket (2).
14. The sealing device for the furnace head of a rotary drying equipment according to claim 13, characterized in that: The flexible joint (4) is U-shaped, with both ends connected to the vertical plate (41).