Shutdown brake device for induced draft fan

Abstract

The utility model relates to the technical field of induced draft fans, in particular to an induced draft fan shutdown braking device which comprises a base, supports are arranged on the left side and the right side of the base in a hinged mode, a set of braking blocks are arranged on the close sides of the two sets of supports respectively, and the distance between the two sets of supports is controlled to change through a connected locking mechanism between the two sets of supports. The distance between the two sets of brake blocks is further adjusted, the induced draft fan coupler located between the two sets of supports is held and braked through the two sets of brake blocks, manual control is adopted, a brake device is installed at the position of the coupler, in this way, the installation space is effectively reduced, and the function of the coupler assembly is expanded.

Description

Technical Field

[0001] This utility model relates to the field of induced draft fan technology, specifically to an induced draft fan shutdown braking device. Background Technology

[0002] The Y4-73 induced draft fan has a diameter of 3 meters and a weight of 3.5 tons, which results in a large inertia after the fan stops. Multiple induced draft fans are used in parallel and connected by the same duct. Therefore, when other induced draft fans are running, the stopped fan will still rotate in the opposite direction, and the system current will increase significantly when the fan is started.

[0003] The fans lack braking devices. If a fan malfunctions during operation and needs to be stopped for repairs, air leaks in the fan ducts can cause the primary fan, blower, or induced draft fan to reverse and become unable to stop, requiring manual assistance to brake. When a single fan needs to be stopped for repairs, air leaks can cause it to reverse and become unusable, making repairs impossible. This results in prolonged downtime, significant safety risks, and a high potential for major accidents during operation.

[0004] Electric brake mechanisms are difficult to control, and precise control would significantly increase costs. Utility Model Content

[0005] (I) Technical Issues

[0006] The present invention aims to at least solve the problem of the lack of a braking structure in the existing technology of induced draft fans.

[0007] (II) Technical Content

[0008] This solution provides a braking device for stopping an induced draft fan, which is achieved by the following specific technical means: including a base, with brackets hinged on the left and right sides of the base, and a set of braking blocks on the near side of each set of brackets;

[0009] Furthermore, the distance between the two sets of brackets is controlled by a locking mechanism, thereby adjusting the distance between the two sets of brake blocks.

[0010] Preferred technical solution 1: The locking mechanism includes sleeves that are rotatably connected to the bracket. Two sets of sleeves pass through a set of lead screws, and the lead screws are threadedly connected to the sleeves. The distance between the two sets of sleeves is controlled by the rotation of the lead screws, thereby realizing the control of the bracket spacing.

[0011] Preferred technical solution 2: The inner side of the brake block is an arc-shaped surface adapted to the coupling.

[0012] Preferred technical solution 3: The brake block and the bracket are also rotatably connected.

[0013] (III) Technical Effects

[0014] The above structure gives this solution the following advantages:

[0015] 1. The brake block mechanism is manually controlled, which allows for easy adjustment on-site according to actual conditions;

[0016] 2. The brake block mechanism is fixed by a pin connection, and the brake block can be made from waste wire belts, which not only facilitates maintenance but also effectively reduces costs.

[0017] 3. The braking device is installed at the coupling, which effectively reduces the installation space and expands the function of the coupling assembly. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this solution.

[0020] Among them, 1. base, 11. mounting hole, 2. bracket, 3. brake block, 4. locking mechanism, 41. sleeve, 42. lead screw, 43. polygonal head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 The induced draft fan stop mechanism includes a base 1, with mounting holes 11 at each of the four corners of the base 1. Brackets 2 are hinged on the left and right sides of the base 1 via pins, and there is a set of brake blocks 3 on the side of each set of brackets 2.

[0023] Furthermore, the distance between the two sets of brackets 2 is controlled by the locking mechanism 4, thereby adjusting the distance between the two sets of brake blocks 3. The two sets of brake blocks 3 are used to clamp and brake the fan coupling located between the two sets of brackets 2. The inner side of the brake block 3 is an arc-shaped surface adapted to the coupling, and the brake block 3 and the bracket 2 are also rotatably connected by a pin, so that when the brackets 2 are close to each other, the brake block 3 can press against the outer wall of the coupling.

[0024] The brake device bracket 2 is fabricated according to the actual dimensions of the coupling on site. The base 1 is fixed in a suitable position below the coupling. The actual dimensions of the equipment in different areas are different, so actual measurement must be carried out to avoid problems during installation. When using the equipment, the personnel remove the coupling protective cover, fix the bracket 2 joints on the base 1, and check whether each joint moves flexibly and without any jamming before proceeding with the corresponding operation.

[0025] Please see Figure 1 The induced draft fan stop mechanism braking device includes a locking mechanism 4, which includes a sleeve 41 rotatably connected to the bracket 2 via a pin. Two sets of sleeves 41 pass through a set of lead screws 42, and the lead screws 42 are threadedly connected to the sleeves 41. The distance between the two sets of sleeves 41 is controlled by the rotation of the lead screws 42, thereby controlling the distance between the brackets 2. The rotatable connection between the sleeves 41 and the bracket 2 can rotate accordingly according to the inclination of the bracket 2, avoiding deformation of the lead screw during use.

[0026] A polygonal head 43 is fixed to one end of the lead screw 42. During operation, an electric wrench can be used to control the locking mechanism 4 through the polygonal head 43, effectively ensuring timely and targeted adjustments for different on-site conditions.

[0027] The pins used are fitted with self-lubricating copper sleeves to ensure flexible joint movement. They must not be welded for fixation, which can prevent excessive local stress on the brake device bracket 2 and brake block 3 as the system tightens.

[0028] Please see Figure 1 The induced draft fan stop mechanism braking device consists of a brake block 3, which is composed of a brake block frame and a brake pad. The two are fixed together by groove riveting. The brake pad can be made from waste thickened cable belts or tires, which can effectively reduce costs and reuse waste materials.

[0029] When using the equipment, the operator removes the coupling protective cover, fixes the bracket 2 joint to the base 1, and checks whether each joint moves flexibly and is not obstructed before proceeding with the corresponding operation.

[0030] When using the brake, the action of the brake is controlled by an electric wrench. Two people should work together to apply the brake slowly. Do not lock the brake all at once to avoid damage to the coupling and fan shaft. At the same time, personnel must follow the maintenance procedures during the braking process and must not use hand tools to directly contact the coupling and drive shaft to avoid safety accidents such as entanglement of rotating parts.

[0031] After the work is completed, remove bracket 2 and brake block 3 or fix the mechanism as needed on site, and then install the coupling protective cover.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An induced draft fan shutdown brake apparatus, characterized by: It includes a base (1), and a support (2) is hingedly arranged on the left and right sides of the base (1), and a group of brake blocks (3) are arranged on the close side of the two groups of supports (2); And a locking mechanism (4) is connected between the two groups of supports (2) for controlling the distance change between the two groups of supports (2).

2. A fan shutdown brake device according to claim 1, characterised in that: The locking mechanism (4) includes a sleeve (41) rotationally connected with the support (2), and the two groups of sleeves (41) pass through a group of lead screws (42), and the lead screw (42) is threadedly connected with the sleeve (41).

3. A fan shutdown brake device according to claim 1, wherein: The inner side of the brake block (3) is an arc surface matched with the shaft coupling.

4. A fan shutdown brake device according to claim 2, wherein: A polygonal head (43) matched with the polygonal barrel of the wrench head is fixed on one side end of the lead screw (42).

5. A fan shutdown brake device according to claim 1, wherein: The brake block (3) is fixedly composed of a brake block (3) frame and a brake leather.

6. A fan shutdown brake device according to claim 3, wherein: The brake block (3) and the support (2) are also rotationally connected.

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