Threaded slotted hood
Through the design of threaded grooved hood, the problem of difficult detection and easy falling off of fillet welds in existing hood connections is solved, and the control of gas flow rate and the improvement of material fluidization effect is achieved.
Patent Information
- Application Number
- CN202421589714.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing hood is difficult to detect the fillet welds connected to the welding of the rib plate, the quality cannot be guaranteed, and it is easy to fall off, resulting in the gas flow rate too low, affecting the material fluidization effect.
The threaded grooved hood design is adopted, and the threaded connection between the hood connecting pipe and the hood head is formed to form a jet channel to avoid material suction and blockage, and the hood head can be replaced separately as needed.
The individual replacement of the hood is realized, which reduces the difficulty of maintenance and maintenance, ensures the control of gas flow rate, improves the material fluidization effect, and reduces the phenomenon of material suction.
Smart Images
Figure CN222918650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a threaded grooved wind cap, belonging to the technical field of reactors. Background Art
[0002] A fluidized bed wind cap refers to a device located at the top of a fluidized bed reactor, and its main function is to regulate the gas flow rate and distribution in the fluidized bed to ensure that the fluidized particles in the reactor maintain good fluidity.
[0003] As an important component in fluidized bed reactors such as cold hydrogenation reactors, the structural forms of wind caps are diverse. The bell-shaped wind cap is widely used because it can prevent material backflow and blockage to a certain extent. Among them, the form of welding the wind cap head and the connecting pipe with gusset plates is widely used because it is more effective in preventing material backflow and blockage. However, due to the welding connection of the wind cap head and the connecting pipe with gusset plates, it is difficult to detect the fillet weld between the wind cap and the gusset plate, and the quality cannot be guaranteed. Moreover, the fillet weld is easily detached during continuous scouring. And due to the space requirements for welding the gusset plates, the annular space distance is generally large, which easily causes the gas flow rate to be too low and affects the material fluidization effect. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a threaded grooved wind cap that can control the gas flow rate and improve the material fluidization effect in view of the above problems.
[0005] The technical scheme adopted by the utility model is as follows:
[0006] A threaded grooved wind cap includes a wind cap connecting pipe. The wind cap connecting pipe has upper and lower openings. The upper part of the wind cap connecting pipe is provided with an upper threaded part, and the upper threaded part is screwed with a wind cap head through threads. The wind cap head has a downwardly penetrating inner cavity, and the upper end of the wind cap connecting pipe is arranged in the inner cavity. A jet channel is arranged on the wind cap connecting pipe. The upper end of the jet channel communicates with a cavity, the lower end of the jet channel penetrates outward, and the lower end of the jet channel is arranged below the wind cap head.
[0007] The lower end of the jet channel is inclined downward and outward simultaneously.
[0008] There are multiple jet channels, and the multiple jet channels are evenly arranged in the circumferential direction.
[0009] The jet channel is a groove arranged on the outer wall of the upper end of the air duct connecting pipe. The groove penetrates outward in the radial direction, and the bottom surface of the groove is inclined.
[0010] The bottom of the upper threaded part is higher than the bottom of the jet channel.
[0011] An air inlet hole is provided in the middle of the lower end of the wind cap connecting pipe, and the diameter of the air inlet is smaller than the inner diameter of the wind cap connecting pipe.
[0012] The upper end of the wind cap head has a conical head or a round head.
[0013] There is a space axially between the conical head or the round head and the top of the wind cap connecting pipe.
[0014] A distribution plate is provided at the lower part of the wind cap connecting pipe.
[0015] A lower threaded part is provided at the lower part of the wind cap connecting pipe. A sleeve is fixedly provided on the distribution plate, and the sleeve is screwed onto the lower threaded part by screwing.
[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:
[0017] A threaded grooved wind cap provided by the present utility model has a channel groove opened on the thread at the upper part of the wind cap connecting pipe, and is threadedly connected with a wind cap head with an internal thread to form a jet channel. It not only avoids the back suction and blockage of materials, but also forms a good jet channel. Due to the use of threaded connection, the wind cap head can be replaced separately according to the usage situation without replacing the whole connecting pipe. Description of the Drawings
[0018] Figure 1 is a schematic structural diagram of the present utility model.
[0019] Figure 2 is a schematic structural diagram of the wind cap connecting pipe.
[0020] Figure 3 is Figure 2 the A-A sectional view of
[0021] Figure 4 is a schematic structural diagram of the wind cap head.
[0022] Markings in the figure: 1 - distribution plate, 2 - sleeve, 3 - wind cap head, 4 - jet channel, 5 - wind cap connecting pipe, 5a - lower threaded part, 5b - groove, 5c - upper threaded part. Detailed Embodiments
[0023] The present utility model will be described in detail below with reference to the drawings.
[0024] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0025] A threaded grooved wind cap, as Figures 1-4As shown in the figure, it includes a wind cap connecting pipe 5. The wind cap connecting pipe 5 has upper and lower openings. The upper part of the wind cap connecting pipe 5 is provided with an upper threaded part 5c, and the upper threaded part 5c is screwed with a wind cap head 3 through threads. The wind cap head 3 has a downwardly penetrating inner cavity, and the upper end part of the wind cap connecting pipe 5 is arranged in the inner cavity. A jet channel 4 is provided on the wind cap connecting pipe 5. The upper end part of the jet channel 4 communicates with a cavity, the lower end part of the jet channel 4 penetrates outward, and the lower end part of the jet channel 4 is arranged below the wind cap head 3.
[0026] Among them, the air flow enters the pipe from the lower opening of the wind cap connecting pipe 5, then enters the inner cavity from the upper opening of the wind cap connecting pipe 5, and then flows out through the jet channel 4 communicating with the cavity and enters the furnace body of the fluidized bed boiler. Specifically, the wind cap connecting pipe 5 and the wind cap head 3 are connected by threads. The wind cap head 3 can be replaced separately according to the usage situation without replacing the entire connecting pipe, which reduces the maintenance difficulty of the wind cap, effectively shortens the replacement period, and after the wind cap connecting pipe 5 and the wind cap head 3 are connected, the wind cap head 3 can be fixed, effectively preventing the wind cap head 3 from falling off. The jet channel 4 changes the wind direction into a channel that penetrates downward and outward at the lower end, so that the reverse air flow cannot enter, thereby reducing or avoiding the phenomenon of material back suction and preventing the material back suction from blocking.
[0027] As another specific embodiment, a plurality of the jet channels 4 are included, and the plurality of jet channels 4 are uniformly arranged in the circumferential direction. Through the uniformly arranged jet channels 4, the air distribution uniformity is good, and the channel gap can be adjusted according to the requirements of gas volume and flow rate to achieve the best material fluidization effect.
[0028] As another specific embodiment, the lower end part of the jet channel 4 is inclined downward and outward at the same time. In this solution, the upper part of the jet channel 4 is vertically arranged, turns at the lower end part and then communicates outward obliquely, effectively reducing the phenomenon of material back suction, and at the same time avoiding the air flow from scouring adjacent wind caps, reducing the wear of the wind caps; and it can effectively mix the gas and the material to improve the fluidization effect. This solution is a preferred embodiment. In other embodiments, the lower end part of the jet channel 4 can also be arranged to penetrate horizontally outward; the upper part of the jet channel 4 can also not be arranged vertically.
[0029] As another specific embodiment, the jet channel 4 is a groove 5b provided on the outer wall of the upper end of the air duct connecting pipe 5. The groove 5b penetrates radially outward, and the bottom surface of the groove 5b is inclined. In this way, by combining the groove 5b with the wind cap head 3, the wind cap head 3 seals the outside of the groove 5b to form the jet channel 4. Compared with directly opening holes, it has less processing difficulty, better precision, and can save the radial width of the wind cap connecting pipe 5. At the same time, the inclined bottom surface can provide an inclined channel without additional drilling.
[0030] As another specific embodiment, the bottom of the upper threaded portion 5c is higher than the bottom of the jet channel 4. With this arrangement, the thread is directly formed on the wind cap connecting pipe 5. The minor diameter of the thread is smaller than the outer diameter of the wind cap connecting pipe 5, i.e., the outer side surface of the groove 5b, and larger than the inner side surface of the groove 5b. After the wind cap head 3 is installed, a jet channel 4 is formed between the minor diameter of the thread and the inner side surface of the groove 5b. Also, the bottom of the upper threaded portion 5c is higher than the bottom of the jet channel 4. When the wind cap head 3 is installed, the threaded portion of the wind cap head 3 is located within the groove 5b, and the bottom of the wind cap head 3 is located at the bottom of the jet channel 4. Therefore, there is a gap between the bottom surface of the wind cap head 3 and the bottom surface of the groove 5b, and this gap serves as the inclined portion of the bottom of the jet channel 4.
[0031] As another specific embodiment, an air inlet hole is provided in the middle of the lower end of the wind cap connecting pipe 5, and the diameter of the air inlet is smaller than the inner diameter of the wind cap connecting pipe 5. When the gas enters the wind cap connecting pipe 5, resistance can be generated to the gas through the air inlet hole, causing a certain eddy current of the gas in the wind cap connecting pipe 5, which helps with mixing and distribution, and thus improves uniformity.
[0032] As another specific embodiment, the upper end of the wind cap head 3 has a tapered head or a round head. With the tapered head or the round head, it is beneficial for the material to slide off and reduces the accumulation of the material on the wind cap head 3.
[0033] As another specific embodiment, there is a space axially between the tapered head or the round head and the top of the wind cap connecting pipe 5. This can ensure that when the gas flows out from the upper part of the wind cap connecting pipe 5, it can change direction at this space and is not blocked by the tapered head and the round head.
[0034] As another specific embodiment, a distribution plate 1 is provided at the lower part of the wind cap connecting pipe 5. The lower part of the wind cap connecting pipe 5 is communicated with the lower part of the distribution plate 1; among them, the lower part of the distribution plate 1 is the air inlet chamber, and the upper part of the distribution plate 1 is the furnace body. The air flow in the air inlet chamber enters the furnace body through the wind cap connecting pipe 5 and the wind cap.
[0035] As another specific embodiment, a lower threaded portion 5a is provided at the lower part of the wind cap connecting pipe 5, and a sleeve 2 is fixedly provided on the distribution plate 1, and the sleeve 2 is screwed onto the lower threaded portion 5a by a spiral. The wind cap connecting pipe 5 can be conveniently replaced through the sleeve 2 and the lower threaded portion 5a. Further, since the upper part of the wind cap connecting pipe 5 needs to be provided with a jet channel 4 and a thread, while only a thread needs to be provided at the lower part, on the basis of ensuring strength, the outer diameter of the lower part of the wind cap connecting pipe 5 can be smaller than the outer diameter of the upper part.
[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. The present utility model extends to any new features or any new combinations disclosed in this specification, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
[0037] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present utility model.
Claims
1. A threaded slotted hood, characterized in that: The invention comprises a hood connecting pipe (5), the hood connecting pipe (5) having upper and lower openings, an upper threaded portion (5c) being provided at the upper portion of the hood connecting pipe (5), and a hood head (3) being screwed onto the upper threaded portion (5c) by means of a thread, the hood head (3) having an inner cavity penetrating downwards, and the upper end portion of the hood connecting pipe (5) being arranged in the inner cavity; an air jet channel (4) being provided on the hood connecting pipe (5), the upper end portion of the air jet channel (4) being connected to the cavity, the lower end portion of the air jet channel (4) penetrating outwards, and the lower end portion of the air jet channel (4) being arranged below the hood head (3).
2. The threaded slotted hood according to claim 1, characterized in that: The jet channels (4) include a plurality of jet channels (4), and the plurality of jet channels (4) are evenly arranged along the circumferential direction.
3. The threaded slotted hood according to claim 1, characterized in that: The lower end of the jet channel (4) is arranged to be inclined downward and outward at the same time.
4. The threaded slotted hood according to claim 3, characterized in that: The jet passage (4) is a groove (5b) arranged on the outer wall of the upper end of the hood connecting pipe (5); the groove (5b) penetrates radially outward, and the bottom surface of the groove (5b) is inclined.
5. The threaded slotted hood according to claim 4, characterized in that: The bottom of the upper threaded portion (5c) is higher than the bottom of the jet passage (4).
6. The threaded slotted hood according to claim 1, characterized in that: An air inlet hole is provided in the middle of the lower end of the hood connecting tube (5), and the diameter of the air inlet hole is smaller than the inner diameter of the hood connecting tube (5).
7. The threaded slotted hood according to claim 1, characterized in that: The upper end of the hood head (3) has a conical head or a round head.
8. The threaded slotted hood according to claim 7, characterized in that: There is a space in the axial direction between the conical head portion or the round head portion and the top of the hood connecting pipe (5).
9. The threaded slotted hood according to claim 1, characterized in that: A distribution plate (1) is provided at the lower part of the hood connecting pipe (5).
10. The threaded slotted hood according to claim 9, characterized in that: The lower part of the hood connecting pipe (5) is provided with a lower threaded portion (5a), and a sleeve (2) is fixedly provided on the distribution plate (1), and the sleeve (2) is screwed on the lower threaded portion (5a) by means of a spiral.