Ventilation and discharge device of cooling tower

Abstract

A ventilation and discharge device of a cooling tower comprises a mounting seat, a fan and a driving motor, the mounting seat is provided with two mounting plates which are parallel to each other, and the two mounting plates are arranged up and down in a spaced mode so that a ventilation space can be formed between the two mounting plates; the number of the fans is two, and the two fans are opposite in the vertical direction and installed in the ventilation holes formed in the two installation plates respectively. The driving motor is installed on the installation base and connected with the fan so as to drive the fan to rotate. According to the embodiment of the utility model, the driving motor drives the two fans which are oppositely arranged up and down to rotate, so that the two fans act together to generate stronger wind power, and the cooling effect of the cooling tower is ensured; and the ventilation space is formed between the two mounting plates of the mounting seat, so that after the steam passes through the fan from bottom to top, part of the steam can be radially diffused outwards through the ventilation space, the diffusion range of the steam is enlarged, the steam is prevented from being gathered above to form a steam cover, and smooth outward diffusion of the steam is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation equipment, and in particular relates to a cooling tower ventilation and discharge device. Background Art

[0002] A cooling tower is a device that uses water as a circulating cooling medium. Cold water cools the working equipment to form hot water, which enters the cooling tower. The water temperature is lowered by the cooling tower and then recycled to cool the working equipment. Specifically, when high-temperature water enters the cooling tower, the ventilation structure (i.e., ventilation fan, fan blades) installed on the top of the cooling tower is used to remove the water vapor generated by the sprayed high-temperature water, thereby achieving cooling by evaporation.

[0003] Due to the high density of water vapor, the water vapor is extracted from the top of the tower through the ventilation structure, so that the water vapor can continuously enter the air and the high-temperature water in the cooling tower can be continuously cooled. However, in actual use, due to the single-layer fan structure used on the existing cooling tower, when the amount of water vapor is relatively large, the effect of the fan driving the water vapor to be removed from the top of the tower is not ideal. The specific reason is that the weight of water vapor is greater than the density of conventional gas. When the amount of water vapor is large during the cooling process, the single-layer fan structure cannot use the airflow to drive a large amount of water vapor with high density to be fully extracted from the top of the tower in time, which causes a large amount of heat to accumulate at the top of the tower, resulting in an unsatisfactory cooling effect of the water-cooled tower. Especially when the wind speed in the air is low, a large amount of steam gas gathers at the mouth of the exhaust duct at the top of the tower to form a "steam hood", resulting in a large amount of water vapor in the cooling tower being unable to continue to dissipate into the air under the isolation of the "steam hood", resulting in an unsatisfactory cooling effect. Utility Model Content

[0004] In view of the deficiencies existing in the related art, the utility model provides a cooling tower ventilation and exhaust device to solve the problem that the ventilation device of the current cooling tower has insufficient wind force and the exhaust is easily blocked by the steam hood.

[0005] The utility model provides a cooling tower ventilation and discharge device, comprising:

[0006] The mounting seat has two mounting plates parallel to each other, and the two mounting plates are arranged in an upper and lower interval to set a ventilation space between the two mounting plates;

[0007] There are two fans, which are opposite to each other up and down and are respectively installed in the ventilation holes set on the two mounting plates;

[0008] The driving motor is mounted on the mounting base and connected to the fan to drive the fan to rotate.

[0009] In some of these embodiments, the two fans are coaxially aligned.

[0010] In some embodiments, the transmission shaft further comprises a transmission shaft, two ends of which are respectively fixedly connected to two fans and are coaxial therewith;

[0011] Only one driving motor is provided and is coaxial with the fan. The driving motor is installed on a bracket provided on the mounting seat, and its driving shaft is fixedly connected to the adjacent fan.

[0012] In some of the embodiments, the two fans are provided with the same number of blades, which are aligned with each other.

[0013] In some of the embodiments, a cylindrical air guide cover is installed in each of the ventilation holes, and a space is provided between the two air guide covers.

[0014] In some of the embodiments, the bracket is located in the corresponding air guide cover, and both ends of the bracket are fixedly connected to the inner wall of the air guide cover. The bracket has a plurality of air holes for allowing air to pass through the bracket.

[0015] In some embodiments, the two fans are divided into a first fan close to the driving motor and a second fan far from the motor;

[0016] A supporting mechanism is installed on the transmission shaft, and the supporting mechanism is located in an air guide cover corresponding to the second fan;

[0017] The supporting mechanism comprises a plurality of supporting rods radially connected to the transmission shaft, the outer ends of the supporting rods are all provided with guide wheels, the plurality of guide wheels are located at the same center of a circle and are in rolling contact with the inner wall of the corresponding air guide cover.

[0018] In some of the embodiments, the plurality of support rods and the plurality of blades of the second fan are alternately arranged in a circumferential direction.

[0019] In some of the embodiments, the bottom end of the lower air guide cover extends downward relative to the corresponding mounting plate, and a plurality of reinforcement support plates are radially installed on the outer wall of the extending portion. The plurality of reinforcement support plates are all located on the same circumference, and the connecting plates horizontally arranged at their bottom ends are all flush with the bottom end of the corresponding air guide cover.

[0020] In some of the embodiments, the four corners of one mounting plate are connected to the four corners of another mounting plate through support columns, and the support columns are provided with a plurality of air holes, and the air holes are arranged horizontally.

[0021] Based on the above technical scheme, in the embodiment of the utility model, a driving motor drives two fans arranged relatively upper and lower to rotate, so that the two fans work together to generate stronger wind force, so that the wind force can smoothly draw water vapor with higher density out of the cooling tower, thereby ensuring the cooling effect of the cooling tower; and there is a ventilation space between the two mounting plates of the mounting seat, so that after the water vapor passes through a fan from bottom to top, a part of it can be radially dissipated outward through the ventilation space, thereby increasing the range of water vapor diffusion, avoiding water vapor from gathering above to form a steam hood, ensuring smooth outward diffusion of water vapor, ensuring the cooling effect of the cooling tower, and solving the problem that the ventilation device of the current cooling tower has insufficient wind force and the exhaust gas is easily blocked by the steam hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a three-dimensional structural diagram of the ventilation and discharge device of the cooling tower of the utility model;

[0024] Figure 2 It is a top view structural diagram of the ventilation and discharge device of the cooling tower of the utility model;

[0025] In the figure:

[0026] 1. Mounting seat; 11. Mounting plate; 12. Ventilation space; 13. Ventilation hole; 14. Bracket; 15. Air vent; 16. Support column; 17. Air vent;

[0027] 2. Fan; 21. First fan; 22. Second fan; 23. Fan blade;

[0028] 3. Driving motor; 4. Transmission shaft; 5. Air guide cover; 6. Support mechanism; 61. Support rod; 62. Guide wheel; 7. Reinforcement support plate; 8. Connecting plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0031] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 to Figure 2 As shown, in an illustrative embodiment of the cooling tower ventilation and discharge device of the utility model, the cooling tower ventilation and discharge device includes a mounting base 1, a fan 2 and a driving motor 3.

[0034] The mounting base 1 has two mounting plates 11 parallel to each other, the two mounting plates 11 are arranged at intervals in the upper and lower parts, and a ventilation space 12 is arranged between the two mounting plates 11. There are two fans 2, the two fans 2 are opposite to each other in the upper and lower parts, and are respectively installed in ventilation holes 13 arranged in the two mounting plates 11. The driving motor 3 is installed on the mounting base 1 and connected to the fan 2.

[0035] The ventilation discharge device is installed on the discharge port at the top of the cooling tower. The driving motor 3 drives the two fans 2 to rotate. Since the two fans 2 are opposite to each other up and down, the two ventilation holes 13 are also opposite to each other up and down, so that the two fans 2 act together in the same vertical space, generating stronger wind force than a single fan 2. The stronger wind force can smoothly extract the water vapor with higher density, so that the heat in the cooling tower is dissipated along with the water vapor, ensuring the cooling effect of the cooling tower.

[0036] Since the two mounting plates 11 of the mounting base 1 are arranged at intervals in the upper and lower parts, after the water vapor passes through the fan 2 below from top to bottom, a part of the water vapor will continue to flow axially upward, pass through the upper mounting plate 11 and disperse upward; the other part of the water vapor will flow radially, thereby diffusing outward in the horizontal direction through the ventilation space 12 of the mounting base 1, and finally the water vapor discharged from the cooling tower will diffuse vertically and horizontally respectively, avoiding the water vapor from gathering upward in the ventilation discharge device, thereby preventing the formation of a steam hood that hinders the subsequent dissipation of water vapor, ensuring the efficiency of water vapor dissipation, and ensuring the cooling effect of the cooling tower.

[0037] In the above-mentioned schematic embodiment, the driving motor 3 of the cooling tower ventilation and exhaust device drives the two fans 2 arranged opposite to each other up and down to rotate, so that the two fans 2 work together to generate stronger wind force, so that the wind force can smoothly draw the water vapor with higher density out of the cooling tower, thereby ensuring the cooling effect of the cooling tower; and there is a ventilation space 12 between the two mounting plates 11 of the mounting seat 1, so that after the water vapor passes through a fan 2 from bottom to top, a part of it can be radially emitted outward through the ventilation space 12, thereby increasing the diffusion range of the water vapor, avoiding the water vapor from gathering at the top to form a steam hood, ensuring the smooth outward diffusion of the water vapor, ensuring the cooling effect of the cooling tower, and solving the problem that the ventilation device of the current cooling tower has insufficient wind force and the exhaust gas is easily blocked by the steam hood.

[0038] In some embodiments, the two fans 2 are coaxially aligned, and the upper and lower ventilation holes 13 are also aligned accordingly to form a cylindrical vertical space, thereby preventing the mounting plate 11 from obstructing the flow of airflow, making the airflow flow smoother in the vertical direction, and ensuring that the two fans 2 can achieve an increase in wind force.

[0039] In some embodiments, a transmission shaft 4 is further included, and both ends of the transmission shaft are respectively fixedly connected to the two fans 2 and are coaxial therewith. Only one drive motor 3 is provided and is coaxial with the fan 2. The drive motor 3 is installed on a bracket 14 provided on the mounting seat 1, and its drive shaft is fixedly connected to the adjacent fan 2.

[0040] If two drive motors 3 are used to drive two fans 2 respectively, not only will the equipment cost be higher, but the two drive motors 3 will also increase the size and energy consumption of the equipment. The drive motor 3 directly drives the fan 2 and causes it to occupy the space where the airflow flows, thereby hindering the flow of the airflow, making it difficult to generate a sufficiently strong wind force, or in order to generate a sufficiently strong wind force, the speed of the fan 2 needs to be increased, further increasing energy consumption. In addition, it is difficult for the two drive motors 3 to maintain synchronization, resulting in a speed difference between the two fans 2, so that the two fans 2 cannot synchronously and concentratedly act on the same piece of gas, resulting in insufficient wind force.

[0041] Compared with two drive motors 3 driving two fans 2 respectively, one drive motor 3 drives two fans 2, which not only reduces the cost of the equipment, reduces the size and energy consumption of the equipment, but also reduces the obstruction of the drive motor 3 to the airflow, ensures that the two fans 2 rotate synchronously, and concentrates on the air, so that the fan 2 can generate strong wind force without a high rotation speed, and smoothly extracts the water vapor with higher density.

[0042] In some embodiments, the two fans 2 are provided with the same number of blades 23, which are aligned with each other, so that the two vertically aligned blades 23 of the two fans 2 rotate synchronously and act on the same vertical space at the same time, concentrating on the air in the space, thereby ensuring the generation of stronger wind force.

[0043] In some embodiments, a cylindrical air guide 5 is installed in each of the ventilation holes 13, so that both fans 2 are located in the corresponding air guide 5, reducing the area of ​​action of the fan 2 on the air, thereby increasing the wind force generated. A gap is provided between the two air guides 5 to ensure that the water vapor passing through the lower fan 2 from top to bottom can flow radially into the ventilation space 12 through the space between the two air guides 5, thereby ensuring radial horizontal diffusion of the water vapor.

[0044] In some embodiments, the bracket 14 is located in the corresponding air guide cover 5 , and both ends of the bracket 14 are fixedly connected to the inner wall of the air guide cover 5 . The bracket 14 has a plurality of air vents 15 for allowing air to pass through the bracket 14 .

[0045] The bracket 14 is installed in the air guide cover 5 to avoid it from occupying additional space for the equipment outside, so that the drive motor 3 can be installed in a position coaxial with the fan to directly drive it. The transmission structure is simple. The air vents 15 set on the bracket 14 reduce the obstruction of the bracket 14 to the flow of air, ensuring that the rotation of the fan 2 generates sufficient airflow.

[0046] In some embodiments, the two fans 2 are divided into a first fan 21 close to the driving motor 3 and a second fan 22 far away from the motor.

[0047] A supporting mechanism 6 is installed on the transmission shaft 4 , and the supporting mechanism 6 is located in the air guide cover 5 corresponding to the second fan 2 .

[0048] The support mechanism 6 includes a plurality of support rods 61 radially connected to the transmission shaft 4 , and guide wheels 62 are installed at the outer ends of the support rods 61 . The plurality of guide wheels 62 are located at the same center of a circle and are in rolling contact with the inner wall of the corresponding air guide cover 5 .

[0049] During the rotation of the fan 2, the centrifugal force can easily cause it to deflect radially, thereby contacting the inner wall of the air scoop 5 and causing wear therewith. Since the first fan 2 is close to the drive motor 3, the drive motor 3 is fixed on the bracket 14 and connected thereto, so that the first fan 2 can stably rotate under the support of the drive shaft of the drive motor 3, thereby avoiding eccentricity of the first fan 2 and contact wear between the inner wall of the air scoop 5. The second fan 2 is away from the fixedly installed drive motor 3, and the inner wall of the air scoop 5 radially supports the drive shaft 4 through the guide wheel 62 and the support rod 61, so that it remains stable in the axial direction, thereby improving the stability of the second fan 2, allowing it to rotate smoothly, and avoiding eccentricity of the first fan 2 and contact wear between the inner wall of the air scoop 5.

[0050] In some embodiments, Figure 2 As shown, the plurality of support rods 61 and the plurality of blades 23 of the second fan 22 are alternately arranged in the circumferential direction. The weight of the blades 23 in the fan 2 accounts for a large proportion, and the alternating arrangement enables each blade 23 to have support rods 61 on both sides, so that the blade 23 can be radially supported by two support rods 61 at the same time, thereby further improving stability.

[0051] In some embodiments, the bottom end of the lower air guide cover 5 extends downward relative to the corresponding mounting plate 11, and a plurality of reinforcement support plates 7 are radially installed on the outer wall of the extending portion. The plurality of reinforcement support plates 7 are all located on the same circumference, and the connecting plates 8 horizontally arranged at their bottom ends are all flush with the bottom end of the corresponding air guide cover 5.

[0052] The reinforcement support plate 7 can be used as a reinforcing rib to reinforce the lower air guide cover 5, improve its structural strength, and stably support the upper structure when it is directly connected to the discharge port at the top of the cooling tower. When the discharge port at the top of the cooling tower is provided with a flange, the connecting plate 8 of the reinforcement support plate 7 can be fixed to the flange by bolts to improve the firmness of the connection, so that the lower air guide cover 5 is closely connected to the exhaust port.

[0053] In some embodiments, the four corners of one mounting plate 11 are connected to the four corners of another mounting plate 11 through support columns 16 , and the support columns 16 are provided with a plurality of air holes 17 , and the air holes 17 are arranged horizontally.

[0054] Four support columns 16 are arranged vertically, with the bottom ends connected to the four corners of the lower mounting plate 11, and the top ends connected to the four corners of the upper mounting plate 11, forming a frame structure to ensure that the water vapor flowing radially and horizontally can flow out of the mounting seat 1 from front to back and left to right. The horizontally arranged air holes 17 can increase the air permeability of the mounting seat 1 and ensure smooth airflow. In addition, the air holes 17 can reduce the weight of the support columns 16, thereby reducing the overall weight of the device.

[0055] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A cooling tower ventilation discharge device, characterized in that: include: The mounting seat has two mounting plates parallel to each other, and the two mounting plates are arranged in an upper and lower interval to set a ventilation space between the two mounting plates; There are two fans, the two fans are opposite to each other up and down, and are respectively installed in the ventilation holes set in the two mounting plates; The driving motor is mounted on the mounting seat and connected to the fan to drive the fan to rotate.

2. The cooling tower ventilation discharge device according to claim 1, characterized in that: The two fans are coaxially aligned.

3. The cooling tower ventilation discharge device according to claim 2, characterized in that: It further comprises a transmission shaft, the two ends of which are respectively fixedly connected to the two fans and coaxial with the two fans; Only one driving motor is provided and is coaxial with the fan. The driving motor is installed on a bracket provided on the mounting seat, and its driving shaft is fixedly connected to the adjacent fan.

4. The cooling tower ventilation discharge device according to claim 3, characterized in that: The two fans are provided with the same number of blades, which are aligned with each other.

5. The cooling tower ventilation discharge device according to claim 3, characterized in that: A cylindrical air guide cover is installed in each of the ventilation holes, and a space is provided between two of the air guide covers.

6. The cooling tower ventilation discharge device according to claim 5, characterized in that: The bracket is located in the corresponding air guide cover, and both ends of the bracket are fixedly connected to the inner wall of the air guide cover. The bracket has a plurality of air holes for allowing air to pass through the bracket.

7. The cooling tower ventilation discharge device according to claim 5, characterized in that: The two fans are divided into a first fan close to the driving motor and a second fan far away from the motor; A supporting mechanism is installed on the transmission shaft, and the supporting mechanism is located in an air guide cover corresponding to the second fan; The support mechanism includes a plurality of support rods radially connected to the transmission shaft, guide wheels are installed at the outer ends of the support rods, the plurality of guide wheels are located at the same center of a circle and are in rolling contact with the inner wall of the corresponding air guide cover.

8. The cooling tower ventilation discharge device according to claim 7, characterized in that: The plurality of support rods and the plurality of blades of the second fan are alternately arranged in a circumferential direction.

9. The cooling tower ventilation discharge device according to claim 5, characterized in that: The bottom end of the air guide cover below extends downward relative to the corresponding mounting plate, and a plurality of reinforcement support plates are radially installed on the outer wall of the extending portion. The plurality of reinforcement support plates are all located on the same circumference, and the connecting plates horizontally arranged at their bottom ends are all flush with the bottom end of the corresponding air guide cover.

10. The cooling tower ventilation discharge device according to claim 1, characterized in that: The four corners of one mounting plate are connected to the four corners of another mounting plate through support columns, and the support columns are provided with a plurality of air holes, and the air holes are arranged horizontally.

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