Roundness correction device for fan blade of water cooling tower

Abstract

The utility model relates to fan roundness correction, and provides a water cooling tower fan blade roundness correction device which comprises an air duct, a fan arranged in the air duct, a blade arranged on the fan, a fixing device connected with the surface of the blade, a horizontally-arranged sleeve connected with the fixing device, a sliding rod arranged in the sleeve in a sliding mode and a spring used for connecting the sliding rod and the sleeve. The range finder is arranged at one end, far away from the air duct, of the sleeve; one end of the sliding rod is arranged in the sleeve, and the other end abuts against the inner wall of the air duct; a measuring head of the distance measuring instrument faces the end portion of the end, located in the sleeve, of the sliding rod. According to the water cooling tower fan blade roundness correction device, roundness correction can be efficiently carried out on fan blades, and the mounting and dismounting procedures of a scaffold are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fan rounding, in particular to a cooling tower fan blade rounding device. Background Art

[0002] Cooling towers are structures used to cool water. They are commonly found in power plants, chemical plants, cement plants, and other facilities that require extensive water temperature control. Their height is determined based on heat exchange capacity, and they are used to conserve and recycle water. The cooling tower's operating principle: Convection currents between incoming air and descending water remove heat. Some of the water evaporates during this convection, removing the corresponding latent heat of evaporation, thereby lowering the water's temperature.

[0003] In order to ensure the flow of air, a fan and large-diameter blades are installed at the upper end of the cooling tower. The fan and blades are installed in the wind tube at the upper end of the cooling tower. Usually, the gap between the fan blades and the inner wall of the wind tube is small. When installing the fan and blades, it is necessary to fully adjust the installation position of the fan and blades so that the fan and blades are installed as centered as possible, that is, the distance between the blades and the inner wall of the wind tube is the same. This process is called calibration. The traditional calibration process usually involves filling the inside of the wind tube with scaffolding, and then workers go up the scaffolding to measure the gap between the blades and the wind tube at each position, and each blade must be measured. Then, the position of the fan is fine-tuned based on the measured data. The entire process not only requires the installation and disassembly of a large amount of scaffolding, but also the workers' measurement efficiency is low, the time is long, and the risk is high. Therefore, it is necessary to design a device that can calibrate the wind tube fan more efficiently and accurately. Utility Model Content

[0004] The purpose of the utility model is to provide a cooling tower fan blade rounding device, which can efficiently round the fan blades and reduce the installation and disassembly processes of scaffolding.

[0005] The embodiment of the present utility model is realized through the following technical scheme: the cooling tower fan blade rounding device of the present utility model includes a wind tube, a fan arranged in the wind tube, and a blade arranged on the fan, including a fixing device connected to the surface of the blade, a horizontally arranged sleeve connected to the fixing device, a sliding rod slidingly arranged in the sleeve, a spring for connecting the sliding rod and the sleeve, and a rangefinder arranged at one end of the sleeve away from the wind tube; one end of the sliding rod is arranged in the sleeve, and the other end abuts against the inner wall of the wind tube; the measuring head of the rangefinder is arranged toward the end of the sliding rod located in the sleeve.

[0006] Furthermore, a pair of the fixing devices are provided, and the pair of the fixing devices are distributed along the length direction of the sleeve; and both of the pair of the fixing devices are connected to the sleeve.

[0007] Furthermore, the fixing device includes a base connected to the outer wall of the sleeve, and a suction cup provided between the base and the blade.

[0008] Furthermore, the fixing device also includes a fixing block provided on the base, a screw rotatably connected to the fixing block, and an adjusting block threadably connected to the screw; the adjusting block is connected to the side wall of the sleeve.

[0009] Furthermore, a ball seat is fixedly provided on the side wall of the adjustment block, a ball head is provided in the ball seat, and the ball head is connected to the side wall of the sleeve.

[0010] Furthermore, a knob is provided at one end of the screw rod away from the fixing block.

[0011] Furthermore, the spring is sleeved on the outer wall of the slide rod, and a fixing ring is provided on the outer wall of one end of the slide rod outside the sleeve. One end of the spring is connected to the end of the sleeve, and the other end is connected to the fixing ring.

[0012] Furthermore, a spherical slot is provided at one end of the slide rod close to the air duct, and a ball is provided in the slot.

[0013] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects: the cooling tower fan blade rounding device of the utility model only needs to build a scaffolding in one place inside the tower for workers to stand, then fix the fixing device and the sleeve on the blade so that the sleeve is parallel to the blade and the end of the slide rod abuts the inner wall of the wind tube. Then, the distance between the distance meter and the slide rod is measured by a distance meter, and the blade is slowly rotated based on this distance. The sleeve and the slide rod will follow the blade rotation, and the gap between the blade and the inner wall of the wind tube is different at different locations. Therefore, the inner wall of the wind tube will push the slide rod to move inside the sleeve, causing the distance between the slide rod and the distance meter to change. By comparing the values of the distance meter at various locations with the reference value, the offset of the fan can be calculated, and then the position of the fan can be fine-tuned. In this way, there is no need to build a scaffolding all over the inside of the wind tube, and the workers do not need to measure at various locations on the inner wall of the wind tube. The offset of the fan can be measured more efficiently and accurately, and the safety of the workers can be better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic diagram of the structure of a cooling tower fan blade rounding device provided by an embodiment of the utility model;

[0016] Figure 2 A schematic structural diagram of a blade portion provided in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of the fixing device provided in an embodiment of the present utility model.

[0018] Icons: 11-air cylinder, 12-fan, 13-blade, 20-fixing device, 21-suction cup, 22-base, 23-fixing block, 24-screw, 25-adjusting block, 26-ball seat, 27-ball head, 28-knob, 31-sleeve, 32-slide rod, 33-distance meter, 34-spring, 35-ball. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0023] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] Example

[0025] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 3 As shown, the cooling tower fan blade rounding device of this embodiment includes a wind tube 11, a fan 12 arranged in the wind tube 11, and a blade 13 arranged on the fan 12, including a fixing device 20 connected to the surface of the blade 13, a horizontally arranged sleeve 31 connected to the fixing device 20, a sliding rod 32 slidably arranged in the sleeve 31, a spring 34 for connecting the sliding rod 32 and the sleeve 31, and a distance meter 33 arranged at an end of the sleeve 31 away from the wind tube 11; one end of the sliding rod 32 is arranged in the sleeve 31, and the other end is in contact with the inner wall of the wind tube 11; the measuring head of the distance meter 33 is arranged toward the end of the sliding rod 32 located in the sleeve 31. Specifically, when in use, it is only necessary to build a scaffolding in a place inside the tower for workers to stand, and then fix the fixing device 20 and the sleeve 31 on the blade 13, so that the sleeve 31 is parallel to the blade 13 and the end of the sliding rod 32 is in contact with the inner wall of the wind tube 11. Then, the distance between the distance meter 33 and the slide bar 32 is measured by the distance meter 33, and based on this distance, the blade 13 is slowly rotated. The sleeve 31 and the slide bar 32 will rotate along with the blade 13, and the gap between the blade 13 and the inner wall of the wind tube 11 is different at different locations. Therefore, the inner wall of the wind tube 11 will push the slide bar 32 to move inside the sleeve 31, causing the distance between the slide bar 32 and the distance meter 33 to change. By comparing the values of the distance meter 33 at various locations with the reference values, the offset of the fan 12 can be calculated, and then the position of the fan 12 can be fine-tuned. In this way, there is no need to build scaffolding inside the wind tube 11, and the staff does not need to measure at various locations on the inner wall of the wind tube 11. The offset of the fan 12 can be measured more efficiently and accurately, and the safety of the staff can be better guaranteed.

[0026] In this embodiment, a pair of fixing devices 20 are provided, and the pair of fixing devices 20 are distributed along the length of the sleeve 31; the pair of fixing devices 20 are both connected to the sleeve 31. Specifically, the pair of fixing devices 20 can better fix the sleeve 31 and better adjust the direction of the sleeve 31 so that it is fully parallel to the blade 13.

[0027] The fixing device 20 in this embodiment includes a base 22 connected to the outer wall of the sleeve 31, and a suction cup 21 disposed between the base 22 and the blade 13. Specifically, most fan blades 12 and 13 are made of aluminum alloy or high-strength plastic and are therefore generally non-magnetic. Therefore, using the suction cup 21 can quickly secure the base 22 to the blade 13 without damaging the blade 13. Because the suction cup 21 does not need to withstand much force, a conventional negative pressure suction cup 21 can effectively secure the base 22 to the blade 13. For blades 13 made of metal and having magnetic properties, the suction cup 21 can also be replaced with a magnet.

[0028] The fixing device 20 in this embodiment further includes a fixing block 23 disposed on the base 22, a screw 24 rotatably connected to the fixing block 23, and an adjustment block 25 threadedly connected to the screw 24; the adjustment block 25 is connected to the side wall of the sleeve 31. Specifically, the height of the adjustment block 25 can be adjusted by rotating the screw 24. By adjusting the height of the adjustment blocks 25 on the fixing device 20, the sleeve 31 can be effectively ensured to be horizontal and parallel to the blade 13.

[0029] In this embodiment, a ball seat 26 is fixedly mounted on the side wall of the adjustment block 25. A ball head 27 is mounted within the ball seat 26. The ball head 27 is connected to the side wall of the sleeve 31. Specifically, the ball head 27 and the ball seat 26 are not completely free to rotate, but rather have a certain friction force. That is, the ball head 27 and the ball seat 26 can maintain their position in the absence of external force. However, the ball head 27 can be manually twisted to rotate within the ball seat 26, which also facilitates the adjustment of the position of the sleeve 31 and the slide rod 32.

[0030] In this embodiment, a knob 28 is provided at one end of the screw rod 24 away from the fixing block 23 .

[0031] In this embodiment, a spring 34 is sleeved onto the outer wall of the slide bar 32. A retaining ring is provided on the outer wall of one end of the slide bar 32, which is located outside the sleeve 31. One end of the spring 34 is connected to the end of the sleeve 31, and the other end is connected to the retaining ring. Specifically, the spring 34 functions to keep the slide bar 32 in contact with the inner wall of the wind tube 11. The rangefinder 33 can be an existing, readily available wireless Bluetooth device. This facilitates connecting the rangefinder 33 to wireless devices such as mobile phones, allowing for real-time viewing of rangefinder 33 data.

[0032] The sliding rod 32 in this embodiment is provided with a spherical slot near one end of the wind tube 11, and a ball 35 is provided in the slot. Specifically, the ball 35 is provided at the end of the sliding rod 32 so that the sliding rod 32 can roll more smoothly on the inner wall of the wind tube 11.

[0033] In summary, the cooling tower fan blade rounding device of this embodiment only requires a scaffolding to be built in one place inside the tower for workers to stand on when in use. Then, the fixing device 20 and the sleeve 31 are fixed to the blade 13, so that the sleeve 31 is parallel to the blade 13 and the end of the slide rod 32 abuts the inner wall of the wind tube 11. The distance between the distance meter 33 and the slide rod 32 is then measured by the distance meter 33. Based on this distance, the blade 13 is slowly rotated. The sleeve 31 and the slide rod 32 will rotate with the blade 13. Since the gap between the blade 13 and the inner wall of the wind tube 11 is different at different locations, the inner wall of the wind tube 11 will push the slide rod 32 to move inside the sleeve 31, causing the distance between the slide rod 32 and the distance meter 33 to change. By comparing the values of the distance meter 33 at various locations with the reference value, the offset of the fan 12 can be calculated, and the position of the fan 12 can then be fine-tuned. In this way, there is no need to build scaffolding inside the wind tube 11, and the staff does not need to measure everywhere on the inner wall of the wind tube 11. The deviation of the fan 12 can be measured more efficiently and accurately, and the safety of the staff can be better guaranteed.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cooling tower fan blade rounding device, comprising a wind tube (11), a fan (12) disposed in the wind tube (11), and blades (13) disposed on the fan (12), characterized in that: The invention comprises a fixing device (20) connected to the surface of the blade (13), a horizontally arranged sleeve (31) connected to the fixing device (20), a sliding rod (32) slidably arranged in the sleeve (31), a spring (34) for connecting the sliding rod (32) and the sleeve (31), and a distance meter (33) arranged at an end of the sleeve (31) away from the wind tube (11); One end of the sliding rod (32) is arranged in the sleeve (31), and the other end is in contact with the inner wall of the wind tube (11); the measuring head of the distance meter (33) is arranged toward the end of the sliding rod (32) located in the sleeve (31).

2. The cooling tower fan blade rounding device according to claim 1, characterized in that: A pair of the fixing devices (20) is provided, and the pair of the fixing devices (20) is distributed along the length direction of the sleeve (31); and the pair of the fixing devices (20) are both connected to the sleeve (31).

3. The cooling tower fan blade rounding device according to claim 2, characterized in that: The fixing device (20) comprises a base (22) connected to the outer wall of the sleeve (31), and a suction cup (21) provided between the base (22) and the blade (13).

4. The cooling tower fan blade rounding device according to claim 3, characterized in that: The fixing device (20) further comprises a fixing block (23) provided on the base (22), a screw (24) rotatably connected to the fixing block (23), and an adjusting block (25) threadedly connected to the screw (24); the adjusting block (25) is connected to the side wall of the sleeve (31).

5. The cooling tower fan blade rounding device according to claim 4, characterized in that: A ball seat (26) is fixedly provided on the side wall of the regulating block (25), a ball head (27) is provided in the ball seat (26), and the ball head (27) is connected to the side wall of the sleeve (31).

6. The cooling tower fan blade rounding device according to claim 4, characterized in that: A knob (28) is provided at one end of the screw rod (24) away from the fixing block (23).

7. The cooling tower fan blade rounding device according to claim 1, characterized in that: The spring (34) is sleeved on the outer wall of the slide rod (32); a fixing ring is provided on the outer wall of one end of the slide rod (32) outside the sleeve (31); one end of the spring (34) is connected to the end of the sleeve (31), and the other end is connected to the fixing ring.

8. The cooling tower fan blade rounding device according to claim 1, characterized in that: The sliding rod (32) is provided with a spherical slot near one end of the air cylinder (11), and a ball (35) is provided in the slot.

Images