Fan braking device

Abstract

The utility model discloses a fan brake device, which belongs to the technical field of thermal power generation equipment, and comprises a protective plate and a brake assembly, the bottom of a protective cover is provided with a brake groove, the brake groove is communicated with a fan and the outside, the brake groove is detachably provided with the protective plate, and the protective plate is used for opening or closing the brake groove; the brake assembly is arranged at the bottom of the protective cover and comprises a movable mechanism, a brake plate and a flexible pad, the brake plate directly faces the brake groove, the flexible pad is detachably arranged on the face, directly facing the brake groove, of the brake plate, the movable mechanism is connected with the brake plate, and the movable mechanism can drive the brake plate to penetrate through the brake groove and abut against the fan. Through the cooperation of the protection plate and the brake plate, the risks of rotating machinery damage, object strike, equipment damage or damage existing in the brake operation process are reduced, operation is easy and convenient, the time consumed by brake operation is shortened, the time for operators to be exposed in a dangerous operation environment is shortened, the brake efficiency is improved, and high safety is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power generation equipment, in particular to a wind machine braking device. Background Art

[0002] At present, when starting up the units in thermal power plants, the fans on one side are all started. After the fans on one side are started, the fans on the other side will have backflow due to loose outlet dampers, causing the non-operating fans to reverse.

[0003] After the fan reverses, you can only remove the upper part of the wheel protective cover of the motor and fan coupling, use wooden blocks to fill the gap between the wheels and the lower part of the protective cover, and gradually insert the wooden blocks to generate friction between the wheels to brake, thereby braking the reverse fan.

[0004] This braking method has the risk of workers being strangled due to the removal of the protective cover on the lower half of the wheel. In addition, during the braking process, the wooden block rubs against the circumferential end surface of the wheel, which may cause the wooden block to fly out and injure people, and may also cause the center of the fan to deviate. In addition, it takes a long time to find a suitable wooden block for braking and the operation is cumbersome, and the braking effect is poor and the overall braking time is long. Utility Model Content

[0005] The utility model aims to provide a fan braking device to solve the technical problems in the prior art of manually inserting wood blocks to achieve fan braking, which has high danger and low braking efficiency.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] A fan braking device, comprising:

[0008] A protective plate, a brake groove is provided at the bottom of the protective cover, the brake groove connects the fan and the outside, and a protective plate is detachably provided on the brake groove, and the protective plate is used to open or close the brake groove;

[0009] A brake assembly is arranged at the bottom of the protective cover, and the brake assembly includes a movable mechanism, a brake plate and a flexible pad. The brake plate is opposite to the brake groove, and the flexible pad is detachably arranged on a side of the brake plate opposite to the brake groove. The movable mechanism is connected to the brake plate, and the movable mechanism can drive the brake plate to pass through the brake groove and abut against the fan.

[0010] Preferably, the movable mechanism includes a support seat and a swing rod, the support seat is fixedly connected to the ground, one end of the swing rod is hinged to the support seat, the side wall of the swing rod is provided with the brake plate, and the swing rod can swing in the vertical direction, thereby driving the brake plate to approach or move away from the brake groove.

[0011] Preferably, a holding handle is provided at the other end of the swing rod.

[0012] Preferably, a damping layer is provided on the outer periphery of the holding handle.

[0013] Preferably, a reinforcing rib is provided at the connection between the swing rod and the support base.

[0014] Preferably, the braking assembly further includes a placement table, the height of the placement table is lower than that of the support base, and when the swing rod is in a position away from the braking groove, the other end of the swing rod can be placed on the placement table.

[0015] Preferably, the height of the support base is adjustable.

[0016] Preferably, the braking plate is arc-shaped, and the radius of the braking plate is equal to the radius of the blower.

[0017] Preferably, the flexible pad is made of rubber, and the rubber is bolted to the braking plate.

[0018] Preferably, locking members are provided at both ends of the protective plate, and when the braking groove is closed, the locking members can lock the protective plate and the braking groove.

[0019] Advantages of the present utility model:

[0020] For the blower braking device proposed by the present utility model, during use, when the blower is running normally, the protective plate closes the braking groove, and the blower is protected by the protective cover to ensure the operation of the blower. When the blower needs to be braked due to reverse rotation, first, the braking groove is opened through the protective plate, and the operator operates the moving mechanism to move the braking plate towards the braking groove until the braking plate passes through the braking groove and abuts against the blower, so as to increase the frictional force on the surface of the blower until the blower stops rotating. Without removing the protective cover on the outer periphery of the blower, reliable braking is achieved through the flexible friction of the braking plate and the flexible pad, reducing the risks of rotating machinery injury, object strike, equipment damage or damage during the braking operation, and the operation is simple and convenient, shortening the braking operation time, reducing the time for the operator to be exposed to the dangerous operation environment, improving the braking efficiency and having high safety. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the blower braking device provided by an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the blower provided by an embodiment of the present utility model;

[0023] Figure 3It is a schematic structural diagram of the movable mechanism provided by the embodiment of the present utility model.

[0024] In the figure:

[0025] 10. Fan; 11. Protective cover; 12. Braking groove; 13. Protective plate; 14. Locking member;

[0026] 20. Braking assembly; 21. Movable mechanism; 211. Support seat; 212. Swing rod; 213. Holding handle; 214. Reinforcing rib; 22. Braking plate; 23. Flexible pad. Specific embodiments

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0030] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0031] The embodiment of the present utility model provides a fan braking device, which can achieve the braking effect during the reverse rotation of the fan, reduce the direct intervention of manual labor, and improve the safety during the operation process.

[0032] See Figures 1 to 3, the braking device for a fan provided by an embodiment of the present utility model includes a protective plate 13 and a braking assembly 20. Among them, a braking groove 12 is formed at the bottom of the protective cover 11. The braking groove 12 communicates the fan 10 with the outside. A protective plate 13 is detachably arranged on the braking groove 12. The protective plate 13 is used to open or close the braking groove 12; the braking assembly 20 is arranged at the bottom of the protective cover 11. The braking assembly 20 includes a moving mechanism 21, a braking plate 22 and a flexible pad 23. The braking plate 22 faces the braking groove 12. The flexible pad 23 is detachably arranged on the surface of the braking plate 22 facing the braking groove 12. The moving mechanism 21 is connected to the braking plate 22. The moving mechanism 21 can drive the braking plate 22 to pass through the braking groove 12 and abut against the fan 10.

[0033] In this embodiment, the fan 10 is cylindrical and can rotate around its own axis. A protective cover 11 is arranged on the outer periphery of the fan 10. Generally, the fan 10 is placed horizontally. For the convenience of description in combination with the drawings, the directions in the following text are described in the directions shown in the drawings, but are not limited thereto.

[0034] For the same fan 10, a plurality of braking grooves 12 can be opened, and a braking assembly 20 is provided corresponding to each braking groove 12. The number thereof is not limited herein.

[0035] During the use process, when the fan 10 is running normally, the protective plate 13 closes the braking groove 12, and the fan 10 is protected by the protective cover 11 to ensure the operation of the fan 10. When the fan 10 needs to be braked due to reverse rotation, first, the protective plate 13 is used to open the braking groove 12. The operator operates the moving mechanism 21 to move the braking plate 22 in the direction close to the braking groove 12 until the braking plate 22 passes through the braking groove 12 and abuts against the fan 10 to increase the friction force on the surface of the fan 10 until the fan 10 stops rotating. Without removing the protective cover 11 on the outer periphery of the fan 10, reliable braking is achieved through the flexible friction of the braking plate 22 and the flexible pad 23 on the fan 10, reducing the risks of rotating machinery injury, object strike, equipment damage or failure during the braking operation. Moreover, the operation is simple and convenient, shortening the braking operation time, reducing the time for the operator to be exposed to the dangerous operation environment, improving the braking efficiency and having high safety.

[0036] See Figure 2 , regarding the protective plate 13. Locking members 14 are arranged at both ends of the protective plate 13. When the braking groove 12 is closed, the locking members 14 can lock the protective plate 13 and the braking groove 12. Through the cooperation of the locking members 14 and the protective plate 13, the safety and stability of the device are enhanced, preventing the protective plate 13 from accidentally opening during the braking process, resulting in braking failure or other safety hazards.

[0037] In some embodiments, a locking member 14 may also be provided at one end of the protective plate 13, and a hinge at the other end. The protective plate 13 is hinged to the protective cover 11 through the hinge to facilitate the opening and closing of the braking groove 12, which will not be elaborated here.

[0038] Specifically, the locking member 14 is selected as a locking bolt and a locking nut. The locking bolt is fixedly connected to the protective cover 11. A card slot is provided on the protective plate 13, and the locking bolt passes through the card slot. When the locking nut is in a relaxed state, the card slot of the protective plate 13 can move along the locking bolt, so as to remove or install the braking groove 12; when the locking nut is in a locked state, the locking nut is threadedly connected to the locking bolt and makes the locking nut abut against the card slot, thereby fixing the protective plate 13 and preventing it from displacing, improving the stability of the protective plate 13.

[0039] See Figure 3 Regarding the movable mechanism 21. The movable mechanism 21 includes a support base 211 and a swing rod 212. The support base 211 is fixedly connected to the ground. One end of the swing rod 212 is hinged to the support base 211. A braking plate 22 is provided on the side wall of the swing rod 212. The swing rod 212 can swing in the vertical direction, thereby driving the braking plate 22 to approach or move away from the braking groove 12. The support base 211 is fixedly connected to the ground, providing a stable support foundation for the entire braking operation and ensuring the stability of the braking process. By hinging the swing rod 212 to the support base 211, the operation is more flexible and convenient. Only by swinging the swing rod 212 can the braking plate 22 be driven to move, simplifying the operation steps. The swing rod 212 can swing in the vertical direction to realize the approach or separation of the braking plate 22 from the blower 10. This method is accurate and easy to control, and can effectively and quickly brake the blower 10, improving the efficiency and accuracy of braking. At the same time, the cooperation structure of the support base 211 and the swing rod 212 is relatively simple, easy to manufacture and maintain, reducing the cost and maintenance difficulty of the movable mechanism 21.

[0040] In other embodiments, the movable mechanism 21 may be a hydraulic cylinder, and the braking plate 22 is arranged at the telescopic end of the hydraulic cylinder. The telescopic movement of the hydraulic cylinder drives the braking plate 22 to move in the direction of approaching or moving away from the braking groove 12. In addition, the movable mechanism 21 may also be to arrange the support base 211 in the middle of the swing rod 212, and the braking plate 22 is arranged at one end of the swing rod 212. According to the lever principle, pressing down the other end of the swing rod 212 can drive the end of the swing rod 212 with the braking plate 22 to rise, so as to move closer to the braking groove 12, etc., which will not be elaborated here. It can be understood that the movable mechanism 21 only needs to ensure that it can drive the braking plate 22 to move in the direction of approaching or moving away from the braking groove 12, and its specific structure is not limited.

[0041] Specifically, a holding handle 213 is provided at the other end of the swing rod 212. First of all, the holding handle 213 provides a clear and convenient force application point for the operator, enabling the operator to more easily and accurately control the swing of the swing rod 212, thereby realizing the contact and braking actions between the brake plate 22 and the fan 10, and improving the convenience and controllability of the operation.

[0042] More specifically, a damping layer is provided on the outer periphery of the holding handle 213. The damping layer can effectively reduce the vibration transmitted from the movement of the swing rod 212 to the holding handle 213 during the operation, making the operator's hand feel more comfortable during the operation, reducing the discomfort and even potential harm caused by the vibration to the hand, and improving the comfort of the operation. On the other hand, the damping layer increases the friction of the holding handle 213, enabling the operator to hold the handle more firmly during the operation, preventing slipping and other situations during the operation, and improving the stability and safety of the operation. Specifically, the damping layer can be selected from existing rubber pads, silica gel pads, etc., which will not be elaborated here.

[0043] In addition, in order to improve the stability of the brake plate 22, a reinforcing rib 214 is provided at the connection between the swing rod 212 and the support seat 211. The setting of the reinforcing rib 214 enhances the structural strength and stability of the connection between the swing rod 212 and the support seat 211, making the swing rod 212 more firm and reliable during the swing process and when bearing the braking reaction force, not easily deformed or damaged, and ensuring the long-term stable operation of the braking operation. Secondly, the reinforcing rib 214 improves the rigidity of the connection, can better transmit the operating force, ensures the accurate and effective execution of the braking action, and avoids the situation of inaccurate or ineffective operation caused by insufficient strength of the connection.

[0044] In order to prevent the swing rod 212 from swaying randomly when the braking operation is not performed, causing potential safety hazards, the braking assembly 20 further includes a placement table, the height of the placement table is lower than that of the support seat 211, and when the swing rod 212 is in a position away from the braking groove 12, the other end of the swing rod 212 can be placed on the placement table. When the swing rod 212 is in a position away from the braking groove 12, the other end of the swing rod 212 can be placed on the placement table, so that the swing rod 212 can be stably supported and fixed, avoiding its random swaying or unnecessary movement due to gravity and other factors, and ensuring the safety and stability of the fan braking device in the non-braking state. Moreover, this design is convenient for the operator. When braking is not required, there is no need to always hold the swing rod 212 by hand, reducing the burden on the operator, and at the same time making the entire operation process more orderly and standardized.

[0045] In order to further improve the adaptability of the movable mechanism 21, the height of the support base 211 is adjustable, so that the height of the support base 211 can be flexibly adjusted according to specific factors such as the size and position of the specific fan 10, ensuring that the brake plate 22 and the fan 10 can be accurately matched, improving the accuracy and reliability of braking, and having high adaptability. Specifically, the support base 211 can be a plurality of connecting rods sleeved with each other in sequence. Among adjacent two connecting rods, one of them can be locked in the other, so that different numbers of connecting rods can be adjusted according to actual on-site needs to be applicable to fans 10 of different heights. Or, the support base 211 can also be a hydraulic telescopic rod. By driving the hydraulic telescopic rod to expand and contract, its own length can be adjusted, etc., which is not limited here. It only needs to ensure that the support base 211 can adjust its own height.

[0046] Regarding the specific structure of the brake plate 22. The brake plate 22 is arc-shaped, and the radius of the brake plate 22 is equal to the radius of the fan 10. Thus, the brake plate 22 can better match the outer peripheral shape of the fan 10. When braking operation is performed, the arc-shaped brake plate 22 can achieve closer and more comprehensive contact with the surface of the fan 10, thereby increasing the friction area, improving the braking effect and efficiency, and ensuring that the fan 10 can stop rotating quickly and stably. On the other hand, since it is equal to the radius of the fan 10, the brake plate 22 is more evenly stressed when contacting the fan 10, avoiding the situation of component damage or unstable braking caused by excessive local stress, and further enhancing the reliability and safety of braking.

[0047] Specifically, the flexible pad 23 is made of rubber, and the rubber is bolted to the brake plate 22. The rubber has certain elasticity and flexibility, and can better fit the surface of the fan 10 during braking, playing a buffering role, reducing the impact and damage to the fan 10, and at the same time enhancing the braking effect. And the way of bolt connection between the rubber and the brake plate 22 ensures the stability of the connection, making the rubber not easy to fall off or shift during use, ensuring long-term stable performance. In addition, it is also convenient to replace the rubber. If the rubber is worn or damaged, it can be easily disassembled and replaced, extending the service life of the entire device. It can be understood that the rubber is a component existing in the art, and its specific material is not elaborated here. In other embodiments, the flexible pad 23 can also be rubber, silica gel, polyurethane, etc., which is not limited here.

[0048] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and alterations to the present invention, and these changes and alterations all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan braking device, wherein the fan (10) is cylindrical and can rotate around its own axis, and a protective cover (11) is arranged on the outer periphery of the fan (10), characterized in that: include: A protective plate (13), a brake groove (12) is provided at the bottom of the protective cover (11), the brake groove (12) is connected to the fan (10) and the outside, and a protective plate (13) is detachably provided on the brake groove (12), and the protective plate (13) is used to open or close the brake groove (12); A brake assembly (20) is arranged at the bottom of the protective cover (11), and the brake assembly (20) includes a movable mechanism (21), a brake plate (22) and a flexible pad (23), wherein the brake plate (22) faces the brake groove (12), and the flexible pad (23) is detachably arranged on a side of the brake plate (22) facing the brake groove (12), and the movable mechanism (21) is connected to the brake plate (22), and the movable mechanism (21) can drive the brake plate (22) to pass through the brake groove (12) and abut against the fan (10).

2. The fan braking device according to claim 1, characterized in that: The movable mechanism (21) comprises a support seat (211) and a swing rod (212); the support seat (211) is fixedly connected to the ground; one end of the swing rod (212) is hinged to the support seat (211); the brake plate (22) is provided on the side wall of the swing rod (212); the swing rod (212) can swing in a vertical direction, thereby driving the brake plate (22) to approach or move away from the brake groove (12).

3. The fan braking device according to claim 2, characterized in that: The other end of the swing rod (212) is provided with a grip handle (213).

4. The fan braking device according to claim 3, characterized in that: A vibration-damping layer is provided on the outer periphery of the gripping handle (213).

5. The fan braking device according to claim 2, characterized in that: A reinforcing rib (214) is provided at the connection between the swing rod (212) and the support seat (211).

6. The fan braking device according to claim 2, characterized in that: The brake assembly (20) also includes a placement table, the height of which is lower than the support seat (211), and when the swing rod (212) is at a position away from the brake groove (12), the other end of the swing rod (212) can be placed on the placement table.

7. The fan braking device according to claim 2, characterized in that: The support base (211) is height-adjustable.

8. The fan braking device according to any one of claims 1 to 7, characterized in that: The brake plate (22) is in an arc shape, and the radius of the brake plate (22) is equal to the radius of the fan (10).

9. The fan braking device according to any one of claims 1 to 7, characterized in that: The flexible pad (23) is a rubber sheet, and the rubber sheet is connected to the brake plate (22) by bolts.

10. The fan braking device according to any one of claims 1 to 7, characterized in that: Locking pieces (14) are provided at both ends of the protection plate (13); when the braking groove (12) is closed, the locking pieces (14) can lock the protection plate (13) and the braking groove (12).

Images