Axial flow fan assembly special for vertical shaft
By installing fire valves and check valves on the top of the shaft, combined with the filter screen installation method of rotatable limit plates, the problems of insufficient ventilation control and maintenance difficulties in the prior art are solved, and effective isolation of gas inside and outside the shaft and stable operation of equipment are achieved.
Patent Information
- Application Number
- CN202421616525.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing vertical shaft top ventilator installation lacks control structure, resulting in limited ventilation effect. At the same time, the filter mesh fixing method of the axial flow fan is prone to failure due to thread wear, affecting maintenance and inspection.
Install fire valves and check valves on the top of the shaft to prevent external gas from entering by opening the check valve and open the fire valve to prevent gas flow; at the same time, the upper filter of the axial flow fan is installed and disassembled through a rotatable limiting plate to avoid thread wear.
It realizes effective isolation and ventilation control of gas inside and outside the shaft, simplifies the maintenance and detection process of axial flow fans, and ensures the stable and safe operation of the equipment.
Smart Images
Figure CN222759968U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of fan equipment, and more specifically to an axial flow fan component dedicated to a vertical shaft. Background technology:
[0002] In existing hydropower stations, the pipe gallery below needs to be ventilated. The existing method is to open a vertical shaft upward on the top surface of the pipe gallery and install a ventilator at the top of the vertical shaft to achieve ventilation;
[0003] The existing shaft top is usually directly installed with a ventilator without other control structures, such as isolating the inside and outside of the shaft, and the effect is limited.
[0004] At the same time, the existing ventilators are all general axial flow fans. After they are installed above the shaft, they need to disassemble the filter mesh at the air outlet of the axial flow fan during regular maintenance. The existing filter meshes are all fixed and connected by bolts. After multiple disassembly and assembly, the threads of the bolts will become slipped due to wear and deformation, making it impossible to fix the filter mesh, affecting the use. In the later stage, the filter mesh can only be fixed by spot welding, and when it is disassembled for maintenance and inspection in the later stage, the welding point needs to be cut off, and the effect is very poor. Utility model content:
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an axial flow fan assembly dedicated to a shaft, which is equipped with a fire damper and a check valve at the top of the shaft, so that external gas can be prevented from entering the shaft by opening the check valve as needed, and at the same time, the fire damper can be opened as needed to block the flow of gas between the inside and outside of the shaft to achieve blocking, and at the same time, the upper filter screen on the top of the axial flow fan is installed for limited blocking by a rotatable limit plate, and it is easy to install and disassemble, and can be repeatedly loaded and unloaded for many times, with good effect.
[0006] The solution of the utility model to solve the technical problem is:
[0007] A shaft-specific axial flow fan assembly comprises a pipe gallery shaft, a pipe gallery ventilation through hole is formed in the middle of the pipe gallery shaft, an annular mounting plate is fixed on the top surface of the pipe gallery shaft, a fire damper is fixed on the top surface of the annular mounting plate, a check valve is fixed on the top surface of the fire damper, and an axial flow fan is fixed on the top of the check valve;
[0008] The air inlet end of the fire damper faces the ventilation through hole of the pipe gallery, the air outlet end of the fire damper faces the air inlet of the check valve, and the air outlet of the check valve faces the air inlet end of the axial flow fan.
[0009] The outer side wall of the bottom end of the main cylinder of the axial flow fan is formed with a radially extending edge, and the bottom surface of the outer side wall of the radially extending edge is formed with a bent annular portion extending downward, the top end surface of the check valve is pressed against the radially extending edge, the top of the check valve is inserted into the bent annular portion, and the outer side wall of the top of the check valve is close to the inner side wall of the bent annular portion.
[0010] A filter mesh is fixed on the bottom surface of the radially extending edge, and the filter mesh covers the air inlet through hole at the bottom end of the main cylinder.
[0011] An upper connecting flange is formed on the outer side wall of the top end of the main cylinder, and a downwardly extending sleeve is formed on the side of the upper filter screen. The sleeve is inserted into the upper part of the main cylinder, the outer side wall of the sleeve is tightly against the inner side wall of the main cylinder, and the bottom surface of the sleeve is pressed against the top surfaces of all supporting side plates.
[0012] The top surface at the inner side of the upper connecting flange edge is movably connected to a limiting plate via a hinge shaft, and a portion of the limiting plate is located on the top surface of the edge of the upper filter screen.
[0013] The outstanding effects of the utility model are:
[0014] It installs a fire damper and a check valve on the top of the shaft, so that the check valve can be opened as needed to prevent external gas from entering the shaft. At the same time, the fire damper can be opened as needed to block the flow of gas between the inside and outside of the shaft to achieve blocking. At the same time, the upper filter screen on the top of the axial flow fan is installed with a limited blocking installation through a rotatable limit plate. It is easy to install and disassemble, and can be repeatedly loaded and unloaded, with good effect. Description of the drawings:
[0015] Figure 1 It is a structural schematic diagram of the utility model;
[0016] Figure 2 It is a partial enlarged view of the utility model;
[0017] Figure 3 It is a partial enlarged view of another part of the utility model. Specific implementation method:
[0018] For example, see Figures 1 to 3As shown, a shaft-specific axial flow fan assembly includes a pipe gallery shaft 10, a pipe gallery ventilation through hole 11 is formed in the middle of the pipe gallery shaft 10, an annular mounting plate 12 is fixed to the top surface of the pipe gallery shaft 10, a fire damper 20 is fixed to the top surface of the annular mounting plate 12, a check valve 30 is fixed to the top surface of the fire damper 20, and an axial flow fan 40 is fixed to the top of the check valve 30; both the check valve 30 and the fire damper 20 adopt the existing conventional circular valve body, which will not be described in detail here. The check valve 30 can prevent the external gas from flowing back into the pipe gallery shaft 10, and the fire damper 20 can be opened and closed when a fire occurs so that the air inside and outside the shaft 10 is blocked to prevent convection.
[0019] Furthermore, the air inlet end of the fire damper 20 faces the ventilation hole 11 of the pipe gallery and covers the top of the ventilation hole 11 of the pipe gallery, the air outlet end of the fire damper 20 faces the air inlet of the check valve 30, and the air outlet of the check valve 30 faces the air inlet end of the axial flow fan 40.
[0020] Furthermore, the outer wall of the bottom end of the main cylinder 41 of the axial flow fan 40 is formed with a radial extension edge 42, and the bottom surface of the outer wall of the radial extension edge 42 is formed with a downwardly extending bent annular portion 43, the top end surface of the check valve 30 is pressed against the radial extension edge 42 and fixedly connected by bolts, the top of the check valve 30 is inserted into the bent annular portion 43, and the top outer wall of the check valve 30 is close to the inner wall of the bent annular portion 43.
[0021] Furthermore, a plurality of reinforcing ribs 44 are welded and fixed on the lower outer wall of the main cylinder 41, and the bottom of the reinforcing ribs 44 is welded and fixed on the top surface of the radially extending edge 42. The reinforcing ribs 44 increase the connection support strength between the main cylinder 41 and the radially extending edge 42, and ensure the support effect on the radially extending edge 42.
[0022] Furthermore, a weight-reducing through hole 45 is formed in the middle of the reinforcing rib plate 44 .
[0023] Furthermore, a filter mesh 1 is fixed to the bottom surface of the radially extending edge 42 , and the filter mesh 1 covers the air inlet hole at the bottom end of the main cylinder 41 .
[0024] Furthermore, the axial flow fan 40 includes a main cylinder 41, a plurality of supporting side plates 46 are fixed in the middle of the inner wall of the main cylinder 41, a motor protection cylinder 47 is located in the middle of the main cylinder 41, one side of all the supporting side plates 46 is welded and fixed to the outer side of the motor protection cylinder 47, a driving motor 48 is inserted in the motor protection cylinder 47, the bottom end of the driving motor 48 is fixed on the top surface of the bottom plate of the motor protection cylinder 47, the bottom end of the output shaft at the bottom of the driving motor 48 extends out of the bottom end of the middle through hole of the bottom plate of the motor protection cylinder 47 and is fixed with a rotating impeller 49.
[0025] An upper connecting flange 411 is formed on the outer side wall of the top end of the main cylinder body 41, and a downwardly extending sleeve portion 51 is formed on the side of the upper filter screen 50. The sleeve portion 51 is inserted into the upper part of the main cylinder body 41, and the outer side wall of the sleeve portion 51 is tightly attached to the inner side wall of the main cylinder body 41, and the bottom surface of the sleeve portion 51 is pressed against the top surface of all the supporting side plates 46.
[0026] The top surface of the inner side of the upper connecting flange edge 411 is movably connected to the limiting plate 9 via a hinge shaft, and a portion of the limiting plate 9 is located on the top surface of the edge of the upper filter screen 50 .
[0027] A gripping portion 52 is fixed to the top surface of the edge of the upper filter screen 50 .
[0028] The above structure allows the axial flow fan 40 to be inspected or repaired by rotating the limit plate 9 so that the portion of the limit plate 9 located at the edge of the top surface of the upper filter 50 is moved away from the top surface of the upper filter 50. At this time, the upper filter 50 can be pulled out upward by simply holding the holding portion 52 to achieve disassembly.
[0029] During the subsequent installation, it is only necessary to insert the sleeve portion 51 of the upper filter screen 50 into the upper part of the main cylinder body 41, with the outer wall of the sleeve portion 51 close to the inner wall of the main cylinder body 41, and rotate the limiting plate 9 so that part of it is on the top surface of the edge of the upper filter screen 50. The installation is completed by limiting and fixing it. It is easy to install and disassemble, can be operated multiple times, and basically will not be damaged.
Claims
1. A shaft-specific axial flow fan assembly, comprising a pipe gallery shaft (10), wherein a pipe gallery ventilation through hole (11) is formed in the middle of the pipe gallery shaft (10), characterized in that: An annular mounting plate (12) is fixed on the top surface of the pipe gallery shaft (10), a fire damper (20) is fixed on the top surface of the annular mounting plate (12), a check valve (30) is fixed on the top surface of the fire damper (20), and an axial flow fan (40) is fixed on the top of the check valve (30); The air inlet end of the fire damper (20) faces the ventilation hole (11) of the pipe gallery, the air outlet end of the fire damper (20) faces the air inlet of the check valve (30), and the air outlet of the check valve (30) faces the air inlet end of the axial flow fan (40).
2. A shaft-specific axial flow fan assembly according to claim 1, characterized in that: The outer wall at the bottom end of the main cylinder (41) of the axial flow fan (40) is formed with a radially extending edge (42), and the bottom surface of the outer wall of the radially extending edge (42) is formed with a bent annular portion (43) extending downward, the top end surface of the check valve (30) is pressed against the radially extending edge (42), the top of the check valve (30) is inserted into the bent annular portion (43), and the outer wall of the top of the check valve (30) is close to the inner wall of the bent annular portion (43).
3. A shaft-specific axial flow fan assembly according to claim 2, characterized in that: A plurality of reinforcing ribs (44) are welded and fixed on the lower outer wall of the main cylinder (41), and the bottom of the reinforcing ribs (44) is welded and fixed on the top surface of the radially extending edge (42).
4. A shaft-specific axial flow fan assembly according to claim 3, characterized in that: A weight-reducing through hole (45) is formed in the middle of the reinforcing rib plate (44).
5. The shaft-specific axial flow fan assembly according to claim 2, characterized in that: A filter mesh (1) is fixed to the bottom surface of the radially extending edge (42), and the filter mesh (1) covers the air inlet hole at the bottom end of the main cylinder (41).
6. The shaft-specific axial flow fan assembly according to claim 1, characterized in that: The axial flow fan (40) comprises a main cylinder (41), a plurality of supporting side plates (46) are fixed in the middle of the inner side wall of the main cylinder (41), a motor protection cylinder (47) is located in the middle of the main cylinder (41), one side of all the supporting side plates (46) are welded and fixed to the outer side of the motor protection cylinder (47), a driving motor (48) is inserted in the motor protection cylinder (47), the bottom end of the driving motor (48) is fixed to the top surface of the bottom plate of the motor protection cylinder (47), the bottom end of the output shaft at the bottom of the driving motor (48) extends out of the bottom end of the middle through hole of the bottom plate of the motor protection cylinder (47) and is fixed with a rotating impeller (49).
7. A shaft-specific axial flow fan assembly according to claim 6, characterized in that: An upper connecting flange (411) is formed on the outer side wall of the top end of the main cylinder (41), and a sleeve portion (51) extending downward is formed on the side of the upper filter screen (50). The sleeve portion (51) is inserted into the upper part of the main cylinder (41), the outer side wall of the sleeve portion (51) is tightly attached to the inner side wall of the main cylinder (41), and the bottom surface of the sleeve portion (51) is pressed against the top surfaces of all the supporting side plates (46).
8. The shaft-specific axial flow fan assembly according to claim 7, characterized in that: The top surface on the inner side of the upper connecting flange edge (411) is movably connected to a limiting plate (9) via a hinge shaft, and a portion of the limiting plate (9) is located on the top surface of the edge of the upper filter screen (50).
9. The shaft-specific axial flow fan assembly according to claim 7, characterized in that: A gripping portion (52) is fixed to the top surface of the edge of the upper filter screen (50).