Natural ventilation direct air cooling tower bypass ventilation device

Abstract

The invention discloses a natural ventilation direct air cooling tower bypass ventilation device which comprises a ventilation shell and four protective covers, the top of the ventilation shell is provided with a ventilation tower barrel, the ventilation tower barrel is communicated with a plurality of conveying pipes, the ends, away from the ventilation tower barrel, of the conveying pipes are communicated with recycling pipes, and the recycling pipes are communicated with the ventilation shell. Two sets of through grooves are symmetrically formed in the top of the ventilation shell, a sliding block is slidably connected to the inner wall of each set of through groove, a plurality of condensation pipes are arranged on the ventilation shell, and the device further comprises a driving assembly, a rotating assembly and a deicing assembly. When a temperature sensor accurately monitors that the surface of the condenser pipe is iced, a driving assembly drives a protective cover to move oppositely, a rotating assembly drives a flexible scraper to move downwards and be attached to the surface of the condenser pipe, and at the moment, a deicing assembly drives the flexible scraper to scrape the surface of the condenser pipe; and the ice layer is prevented from influencing the heat exchange efficiency and normality of the condenser pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of air-cooled towers, and in particular to a bypass ventilation device for a natural ventilation direct air-cooled tower. Background Art

[0002] As a core device of an industrial cooling system, the natural ventilation direct air-cooled tower is widely used in high-energy-consuming fields such as thermal power generation, petrochemical industry, and metallurgy. Its working principle is to achieve cooling through the heat exchange between air and the high-temperature medium in the condensation pipe, and it has advantages such as energy conservation and environmental protection.

[0003] For the current ventilation device, the existing direct air-cooled unit air-cooled island cooling device disclosed in the patent number "CN113883915B" blows air to two groups of condensation tube bundles through an axial flow fan, and under the driving action of a power device, a number of groups of turbine blades on each group of shaft rings rotate and accelerate the steam inside the steam pipe, so that the steam inside the steam pipe rotates forward, accelerating the forward speed of the steam inside the steam pipe. However, under cold weather conditions, the moisture in the steam will gradually condense and freeze on the surfaces of the condensation tube bundles and heat dissipation fins. The formation of the ice layer not only directly hinders the effective transfer of heat from the steam to the air, but also reduces the cooling efficiency.

[0004] Accordingly, this application proposes a bypass ventilation device for a natural ventilation direct air-cooled tower. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a bypass ventilation device for a natural ventilation direct air-cooled tower.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A bypass ventilation device for a natural ventilation direct air-cooled tower, comprising a ventilation housing and four protective covers. A ventilation tower barrel is installed at the top of the ventilation housing. A plurality of delivery pipes are communicated with the ventilation tower barrel. The end of the delivery pipe far away from the ventilation tower barrel is communicated with a recovery pipe. Two groups of through slots are symmetrically opened at the top of the ventilation housing. The inner wall of each group of through slots is slidably connected with a slider. The slider is fixedly connected with the protective cover. A threaded rod is rotatably connected to the inner wall of the protective cover. A nut is threadedly connected to the threaded rod. A plurality of condensation pipes are arranged on the ventilation housing;

[0008] It further includes:

[0009] A driving component for driving the slider to horizontally slide in the through slot;

[0010] A rotating component for driving the threaded rod to rotate;

[0011] De-icing assembly, which is used to remove ice on the surface of the condensate pipe.

[0012] Preferably, the driving assembly includes:

[0013] A first motor, which is fixedly connected inside the ventilation housing;

[0014] A double-headed screw, which is rotatably connected to the inner wall of the ventilation housing, and the double-headed screw is fixedly connected to the output end of the first motor;

[0015] The slider is threadedly connected to the double-headed screw.

[0016] Preferably, the rotating assembly includes:

[0017] A gear, which is fixedly connected to the end of the threaded rod away from the protective cover;

[0018] A chute, which is opened on the side wall of the ventilation housing;

[0019] A rack, which is fixedly connected to the inner wall of the chute;

[0020] The gear meshes with the rack;

[0021] A guide rod, which is fixedly connected to the inner wall of the protective cover, and the guide rod is slidably connected to the nut.

[0022] Preferably, the de-icing assembly includes:

[0023] A rectangular frame, which is fixedly connected to the side wall of the nut;

[0024] A second motor, which is fixedly connected to the outer side wall of the rectangular frame;

[0025] A driving shaft, which is fixedly connected to the output end of the motor, and the driving shaft is rotatably connected to the rectangular frame;

[0026] A reciprocating lead screw, which is fixedly connected to the end of the driving shaft away from the second motor, and the reciprocating lead screw is rotatably connected to the rectangular frame;

[0027] A connecting plate, which is threadedly connected to the reciprocating lead screw;

[0028] A flexible scraper, which is evenly arranged on the bottom surface of the connecting plate.

[0029] Preferably, a special-shaped connecting rod is fixedly connected to the bottom end of the slider, the special-shaped connecting rod is slidably connected to the through groove, a water guide plate is fixedly connected to the end of the special-shaped connecting rod away from the slider, there are multiple water guide plates, and a telescopic rod is fixedly connected to the opposite side of the multiple water guide plates.

[0030] Preferably, a fixing block is fixedly connected to the inner side wall of the ventilation housing, the fixing block is fixedly connected to the telescopic rod, and multiple axial flow fans are installed inside the ventilation housing.

[0031] The present invention has the following beneficial effects:

[0032] 1. By setting the deicing component and the rotating component, when the temperature sensor accurately monitors that ice appears on the surface of the condensing pipe, it will control the first motor to drive the double-headed screw to rotate, thereby driving the two protective covers to move towards each other. During the movement, the gear meshes with the rack, thereby driving the threaded rod to rotate, so that the support block drives the rectangular frame and the flexible scraper to move downward and fit the surface of the condensing pipe. At this time, the second motor drives the reciprocating lead screw to drive the cross plate and the flexible scraper to reciprocate along the surface of the condensing pipe, scraping off the ice layer on the condensing pipe, avoiding the ice layer from affecting the heat exchange efficiency and normal operation of the condensing pipe.

[0033] 2. By setting multiple conveying pipes, the steam in the ventilation tower barrel is conveyed to both sides, and is cooled by the cooperation of the axial flow fan and the condensing pipe, and then the cooled steam is collected through the recovery pipe.

[0034] 3. By setting the water guide plate, when the protective covers move closer to each other, the water guide plate at the bottom is synchronously driven to move below the condensing pipe, and the shoveled ice layer will immediately fall onto the water guide plate and be discharged through the drain port opened on the side wall of the ventilation housing, avoiding the shoveled ice layer from falling into the axial flow fan and causing damage to the axial flow fan, thereby ensuring the stable and efficient operation of the entire ventilation device. Description of the Drawings

[0035] Figure 1 It is a schematic diagram of the overall structure of a natural ventilation direct air-cooled tower bypass ventilation device proposed by the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of a natural ventilation direct air-cooled tower bypass ventilation device without the protective cover proposed by the present invention;

[0037] Figure 3 It is a schematic diagram of the sectional structure of the ventilation housing and the ventilation tower barrel in the present invention;

[0038] Figure 4 It is a schematic diagram of the connection structure between the deicing component and the rectangular frame in the present invention;

[0039] Figure 5 It is a schematic diagram of the connection structure of the slider, the special-shaped connecting rod, the water guide plate, etc. in the present invention.

[0040] In the figure: 1. Ventilation housing; 2. Ventilation tower barrel; 21. Delivery pipe; 22. Recovery pipe; 3. Through groove; 4. Slide block; 41. First motor; 42. Double-headed screw rod; 5. Protective cover; 6. Threaded rod; 61. Gear; 601. Chute; 62. Rack; 63. Guide rod; 7. Nut; 71. Rectangular frame; 72. Second motor; 73. Driving shaft; 74. Reciprocating lead screw; 75. Connecting plate; 76. Flexible scraper; 8. Special-shaped connecting rod; 9. Water guide plate; 10. Expansion rod; 11. Fixed block; 12. Axial flow fan; 13. Condensing pipe. Specific implementation mode

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0042] Embodiment 1:

[0043] Refer to Figures 1 to 5 , a bypass ventilation device for a natural ventilation direct air-cooled tower, including a ventilation housing 1 and four protective covers 5. The protective covers 5 are made of aluminum alloy material, which has the characteristics of light weight, high strength, and corrosion resistance. When the four protective covers 5 are closed, effective coverage and protection of the condensing pipe 13 area can be achieved;

[0044] A temperature sensor is installed inside the ventilation housing 1. The temperature sensor senses the temperature change on the surface of the condensing pipe 13 through the sensitive element inside, and converts the temperature change into an electrical signal to control the first motor 41 and the second motor 72, so that the driving component and the deicing component operate. This temperature sensor belongs to the prior art in this field and needs to be selected according to the actual situation. It only includes and is not unique, so it will not be described in detail.

[0045] The top of the ventilation housing 1 is installed with a ventilation tower barrel 2, which is made of carbon steel or alloy steel to withstand the high temperature and pressure of steam and ensure the structural stability.

[0046] Multiple delivery pipes 21 are connected to the ventilation tower barrel 2. One end of the delivery pipe 21 away from the ventilation tower barrel 2 is connected with a recovery pipe 22. Two groups of through grooves 3 are symmetrically opened at the top of the ventilation housing 1. The inner walls of each group of through grooves 3 are slidably connected with slide blocks 4. The slide blocks 4 are fixedly connected with the protective covers 5. The inner wall of the protective cover 5 is rotatably connected with a threaded rod 6. A nut 7 is threadedly connected to the threaded rod 6. There are multiple condensing pipes 13 on the ventilation outer shell, and a driving component, a rotating component, and a deicing component are also included;

[0047] The driving component is used to drive the slider 4 to slide horizontally in the through groove 3; the driving component includes a first motor 41 and a double-headed screw 42. The first motor 41 is fixedly connected inside the ventilation housing 1; the double-headed screw 42 is rotatably connected to the inner wall of the ventilation housing 1, the double-headed screw 42 is fixedly connected to the output end of the first motor 41, and the slider 4 is threadedly connected to the double-headed screw 42.

[0048] In this embodiment, first, after the device is installed at the designated position, when steam enters the ventilation tower barrel 2, the steam on both sides will be transported into the recovery pipe 22 by the conveying pipes 21. And when the conveying pipes 21 are conveying steam, the axial flow fan 12 starts to operate, continuously blowing air from the ventilation housing 1 towards the top condenser pipe 13. Under the action of the wind, the heat exchange between the steam in the conveying pipe 21 and the condenser pipe 13 is more sufficient, so that the cooled steam is transported to the recovery pipe 22. At this time, a storage device can be arranged at the end of the recovery pipe 22 to store the cooled steam.

[0049] Embodiment Two:

[0050] Different from Embodiment One, this embodiment further has the following content: The rotating component is used to drive the threaded rod 6 to rotate. The rotating component includes a gear 61, a chute 601, a rack 62 and a guide rod 63. The gear 61 is fixedly connected to the end of the threaded rod 6 away from the protective cover 5; the chute 601 is opened on the side wall of the ventilation housing; the rack 62 is fixedly connected to the inner wall of the chute 601; the gear 61 meshes with the rack 62; the guide rod 63 is fixedly connected to the inner wall of the protective cover 5, and the guide rod 63 is slidably connected to the nut 7. The guide rod 63 provides a guiding function for the support block to ensure that the support block can move smoothly along a predetermined straight-line trajectory when the threaded rod 6 rotates.

[0051] In this embodiment, when the two protective covers 5 move inwards or outwards, the gear 61 at their bottom precisely meshes with the rack 62, and the gear 61 is forced to rotate. And it drives the threaded rod 6 to rotate together. The nut 7 sleeved on its outer part moves slowly upwards along the guide rod 63 which is slidably connected to it under the action of the thread. The rectangular frame 71 fixedly connected to its side wall also moves upwards accordingly, and drives the de-icing component to move upwards synchronously, effectively avoiding the flexible scraper 76 in the de-icing component from colliding with the condenser pipe 13.

[0052] Embodiment Three:

[0053] Compared with the first and second embodiments, in this embodiment, the de-icing component is used to remove the ice on the surface of the condenser tube 13. The de-icing component includes a rectangular frame 71, a second motor 72, a drive shaft 73, a reciprocating lead screw 74, a connecting plate 75, and a flexible scraper 76. The rectangular frame 71 is fixedly connected to the side wall of the nut 7. The second motor 72 is fixedly connected to the outer side wall of the rectangular frame 71. The drive shaft 73 is fixedly connected to the output end of the motor, and the drive shaft 73 is rotatably connected to the rectangular frame 71. The reciprocating lead screw 74 is fixedly connected to one end of the drive shaft 73 away from the second motor 72, and the reciprocating lead screw 74 is rotatably connected to the rectangular frame 71. The connecting plate 75 is threadedly connected to the reciprocating lead screw 74. The flexible scraper 76 is evenly arranged on the bottom surface of the connecting plate 75. The flexible scraper 76 is made of rubber flexible material, which has good flexibility, wear resistance, and low-temperature resistance. These materials can maintain elasticity in a low-temperature environment, improve the de-icing effect. At the same time, the flexible scraper 76 is provided with an opening that fits the condenser tube 13 to ensure close contact between the scraper and the surface of the condenser tube 13.

[0054] A special-shaped connecting rod 8 is fixedly connected to the bottom end of the slider 4. The special-shaped connecting rod 8 is slidably connected to the through groove 3. One end of the special-shaped connecting rod 8 away from the slider 4 is fixedly connected to a water guide plate 9. There are multiple water guide plates 9. A telescopic rod 10 is fixedly connected to the opposite side of the multiple water guide plates 9, so as to drive the water guide plate 9 to accurately move below the condenser tube 13, timely collect and discharge the scraped ice layer, and avoid water accumulation from damaging the device.

[0055] The water guide plate 9 is inclined and hollow, which can reduce its own weight, facilitate the ice layer and water to slide down naturally by gravity. Drainage holes are provided on both sides of the ventilation housing 1 corresponding to the number of water guide plates 9. The water guide plate 9 discharges the ice cubes or water out of the ventilation housing 1 through the drainage holes.

[0056] A fixed block 11 is fixedly connected to the inner side wall of the ventilation housing 1. The fixed block 11 is fixedly connected to the telescopic rod 10. Multiple axial flow fans 12 are installed inside the ventilation housing 1.

[0057] In this embodiment, when the temperature sensor accurately monitors that ice appears on the surface of the condenser tube 13, the drive assembly drives the two protective covers 5 to move inward, and the rotating assembly drives the flexible scraper 76 to move down and fit onto the surface of the condenser tube 13. At this time, the second motor 72 drives the reciprocating lead screw 74 to rotate, and the connecting plate 75 sleeved outside it randomly drives the flexible scraper 76 to reciprocate, scraping the ice layer on the condenser tube 13;

[0058] When the driving component drives the protective cover 5 to move, the special-shaped connecting rod 8 drives the water guide plate 9 at the bottom to move, and the telescopic rod 10 synchronously drives multiple water guide plates 9 to move below each condensing pipe 13. After the flexible scraper 76 scrapes off the ice layer, the scraped ice layer is collected and discharged from the ventilation housing 1 smoothly through the drain hole, avoiding the adverse effects caused by ice layer accumulation on the device and ensuring the continuous and stable operation of the entire ventilation device.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A natural ventilation direct air cooling tower bypass ventilation device, comprising a ventilation housing (1) and four protective covers (5), characterized in that: A ventilation tower (2) is installed on the top of the ventilation shell (1), and a plurality of delivery pipes (21) are connected to the ventilation tower (2), and one end of the delivery pipe (21) away from the ventilation tower (2) is connected to a recovery pipe (22). Two groups of through grooves (3) are symmetrically opened on the top of the ventilation shell (1), and a slider (4) is slidably connected to the inner wall of each group of the through grooves (3), and the slider (4) is fixedly connected to the protective cover (5). A threaded rod (6) is rotatably connected to the inner wall of the protective cover (5), and a nut (7) is threadedly connected to the threaded rod (6). A plurality of condensation pipes (13) are provided on the ventilation shell; Also includes: A driving assembly, the driving assembly being used to drive the slider (4) to slide horizontally in the through groove (3); A rotating assembly, the rotating assembly being used to drive the threaded rod (6) to rotate; A deicing assembly is provided, wherein the deicing assembly is used to remove ice from the surface of a condenser pipe (13).

2. A natural ventilation direct air cooling tower bypass ventilation device according to claim 1, characterized in that: The drive assembly comprises: A first motor (41), the first motor (41) being fixedly connected inside the ventilation housing (1); A double-headed screw (42), the double-headed screw (42) being rotatably connected to the inner wall of the ventilation housing (1), and the double-headed screw (42) being fixedly connected to the output end of the first motor (41); The slider (4) is threadedly connected to the double-headed screw (42).

3. A natural ventilation direct air cooling tower bypass ventilation device according to claim 1, characterized in that: The rotating assembly comprises: a gear (61), the gear (61) being fixedly connected to an end of the threaded rod (6) away from the protective cover (5); A slide groove (601), wherein the slide groove (601) is provided on a side wall of the ventilation housing; A rack (62), wherein the rack (62) is fixedly connected to the inner wall of the slide groove (601); The gear (61) and the rack (62) are meshed with each other; A guide rod (63), wherein the guide rod (63) is fixedly connected to the inner wall of the protective cover (5), and the guide rod (63) is slidably connected to the nut (7).

4. A natural ventilation direct air cooling tower bypass ventilation device according to claim 1, characterized in that: The de-icing assembly comprises: A rectangular frame (71), wherein the rectangular frame (71) is fixedly connected to a side wall of the nut (7); a second motor (72), the second motor (72) being fixedly connected to an outer side wall of the rectangular frame (71); A driving shaft (73), wherein the driving shaft (73) is fixedly connected to an output end of the motor, and the driving shaft (73) is rotationally connected to the rectangular frame (71); a reciprocating screw (74), the reciprocating screw (74) being fixedly connected to an end of the driving shaft (73) away from the second motor (72), the reciprocating screw (74) being rotatably connected to the rectangular frame (71); A connecting plate (75), wherein the connecting plate (75) is threadedly connected to the reciprocating screw (74); A flexible scraper (76) is evenly arranged on the bottom surface of the connecting plate (75).

5. A natural ventilation direct air cooling tower bypass ventilation device according to claim 1, characterized in that: The bottom end of the slider (4) is fixedly connected to a special-shaped connecting rod (8), the special-shaped connecting rod (8) is slidably connected to the through groove (3), and one end of the special-shaped connecting rod (8) away from the slider (4) is fixedly connected to a water guide plate (9), wherein a plurality of water guide plates (9) are provided, and a telescopic rod (10) is fixedly connected to opposite sides of the plurality of water guide plates (9).

6. A natural ventilation direct air cooling tower bypass ventilation device according to claim 5, characterized in that: A fixing block (11) is fixedly connected to the inner side wall of the ventilation housing (1), and the fixing block (11) is fixedly connected to the telescopic rod (10). A plurality of axial flow fans (12) are installed inside the ventilation housing (1).

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