Brake device of induced draft fan

Abstract

The utility model relates to the technical field of induced draft fan braking, and discloses an induced draft fan braking device which comprises a plurality of braking assemblies, the braking assemblies are arranged on the outer wall of a rotating shaft in the radial direction, each braking assembly comprises an adjusting bolt, an adjusting nut and an anti-abrasion gasket, the anti-abrasion gaskets are arranged on the outer wall of the rotating shaft, and the adjusting bolts are arranged at the ends, away from the rotating shaft, of the anti-abrasion gaskets. The adjusting bolt penetrates through the induced draft fan shell, and the adjusting nut is arranged at the end, extending out of the induced draft fan, of the adjusting bolt. By rotating the adjusting nut, the adjusting bolt drives the anti-abrasion gasket to be close to the rotating shaft, when the anti-abrasion gasket is tightly attached to the outer wall of the rotating shaft, the rotating shaft is clamped, the rotating shaft is prevented from rotating when not working, accidents are avoided, and the braking reliability of the induced draft fan is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of induced draft fan brakes, in particular to an induced draft fan brake device. Background Art

[0002] An induced draft fan is a device that generates negative pressure by rotating an impeller driven by a rotating shaft, thereby extracting air from the system. It is generally installed at the tail end of a boiler and is used to extract hot flue gas from the furnace. However, the induced draft fan is prone to failure during operation. Once the induced draft fan fails, the fan needs to be stopped for maintenance. However, it is difficult to brake the impeller of the induced draft fan. Existing braking devices generally use plastic soft water pipe winding type or welded bracket type brakes. However, the reliability of the plastic soft water pipe winding type brake is poor, and the welding bracket type installation process is complicated and time-consuming. Therefore, we propose an induced draft fan brake device to solve the above problems. Utility Model Content

[0003] The utility model aims to provide an induced draft fan brake device to solve the problem of low reliability of existing induced draft fan brakes.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a brake device for an induced draft fan, comprising a plurality of brake assemblies, which are radially arranged on the outer wall of the rotating shaft, the brake assembly comprising an adjusting bolt, an adjusting nut and an anti-wear gasket, the anti-wear gasket being arranged on the outer wall of the rotating shaft, the adjusting bolt being arranged at the end of the anti-wear gasket away from the rotating shaft, and the adjusting bolt passing through the outer casing of the induced draft fan, and the adjusting nut being arranged at the end of the adjusting bolt extending out of the induced draft fan.

[0005] The beneficial effects of this solution are: by rotating the adjusting nut on the outer wall of the induced draft fan, the length of the adjusting bolt extending into the interior of the induced draft fan is controlled. When the rotating shaft needs to be braked, the adjusting nut is rotated so that the adjusting bolt drives the anti-wear gasket close to the rotating shaft. When the anti-wear gasket is close to the outer wall of the rotating shaft, the rotating shaft is clamped to prevent the rotating shaft from rotating when it is not working. Conversely, the adjusting nut can also be rotated so that the adjusting bolt drives the anti-wear gasket away from the rotating shaft, so that the induced draft fan can work normally.

[0006] Preferably, as an improvement, the brake assembly further comprises a fixing plate, which is arranged on the outer wall of the induced draft fan, the fixing plate is provided with a fixing hole, the adjusting bolt passes through the fixing hole, and the adjusting nut is arranged at one end of the adjusting bolt passing through the fixing plate.

[0007] The beneficial effect is that the fixing plate can increase the contact area between the adjusting nut and the outer wall of the induced draft fan, disperse the force of the adjusting nut acting on the outer wall of the induced draft fan, and avoid the adjusting nut from excessively squeezing the induced draft fan casing, causing damage or scratches to the induced draft fan casing.

[0008] Preferably, as an improvement, the brake assembly further comprises a support plate, the support plate is arranged on the inner wall of the induced draft fan, a sleeve is provided at one end of the support plate away from the rotating shaft, the end of the sleeve away from the support plate passes through the induced draft fan, and the adjusting bolt is located in the sleeve.

[0009] The beneficial effects are as follows: the support plate is used to install the sleeve, and the sleeve is used to cover the adjusting bolt, so that the adjusting bolt can rotate freely between the induced draft fans and avoids the adjusting bolt from being stuck.

[0010] Preferably, as an improvement, the brake assembly further comprises an inner lining plate, which is arranged on the outer wall of the rotating shaft, the anti-wear gasket is arranged on one end of the inner lining plate close to the rotating shaft, and the adjusting bolt is arranged on the end of the inner lining plate away from the rotating shaft.

[0011] The beneficial effects are as follows: the inner lining plate is used to prop open the anti-wear gasket, thereby preventing the anti-wear gasket from deforming during clamping and increasing the stability of the anti-wear gasket clamping.

[0012] Preferably, as an improvement, the brake assembly further comprises a spring, which is sleeved on the outer wall of the adjusting bolt and located between the support plate and the inner lining plate.

[0013] The beneficial effect is: the spring is arranged between the support plate and the inner lining plate, and the inner lining plate can be pushed toward the rotating shaft by the elastic force of the spring, so that the anti-wear gasket is tightly attached to the outer wall of the rotating shaft. While the spring stretches the inner lining plate, it can also increase the stability of the adjusting nut and the induced draft fan casing, preventing the adjusting nut from rotating. When the induced draft fan does not need to be braked, the inner lining plate is close to the support plate to further compress the spring, so that the adjusting nut and the fixed plate fit more closely, further preventing the adjusting nut from rotating, causing the anti-wear gasket to contact the rotating shaft when the induced draft fan is working.

[0014] Preferably, as an improvement, the inner lining plate and the anti-wear gasket are both provided with a plurality of mounting holes, and the inner lining plate and the anti-wear gasket are fixedly connected by bolts and the mounting holes.

[0015] The beneficial effect is that the anti-wear gasket is detachably connected to the inner lining plate, which can increase the speed of replacing the anti-wear gasket and reduce the maintenance cost of the brake assembly.

[0016] Preferably, as an improvement, the support plate is fixed to the inner wall of the induced draft fan by welding, and the side wall of the support plate is perpendicular to the inner wall of the induced draft fan.

[0017] The beneficial effect is that the support plate can be firmly fixed to the inner wall of the induced draft fan by welding, and the side of the support plate is set to be perpendicular to the inner wall of the induced draft fan, which can reduce the welding difficulty of the workers and increase the installation efficiency.

[0018] Preferably, as an improvement, the support plate, inner lining plate and anti-wear gasket are all arranged in an arc shape, and the end of the anti-wear gasket close to the rotating shaft is in contact with the outer wall of the rotating shaft, the end of the inner lining plate close to the rotating shaft is in contact with the outer wall of the anti-wear gasket, and the end of the support plate close to the rotating shaft is in contact with the outer wall of the inner lining plate.

[0019] The beneficial effect is that the arc-shaped design enables the anti-wear gasket to fit more closely to the outer wall of the rotating shaft, thereby increasing the contact area between the anti-wear gasket and the outer wall of the rotating shaft, thereby making the operation of the brake assembly more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic cross-sectional view of a brake assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of the support plate and sleeve according to an embodiment of the utility model;

[0022] Figure 3 This is a structural diagram of the inner lining plate of an embodiment of the utility model;

[0023] Figure 4 This is a schematic structural diagram of the anti-wear gasket according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The reference numerals in the drawings of the specification include: adjusting bolt 1, adjusting nut 2, anti-wear gasket 3, fixing plate 4, support plate 5, sleeve 6, lining plate 7, spring 8, mounting hole 9, rotating shaft 10, induced draft fan 11.

[0026] Example

[0027] The embodiment is basically as shown in the attached Figure 1-4 As shown, Figure 1 The illustrated induced draft fan brake device comprises a plurality of brake assemblies, which are radially arranged on the outer wall of the rotating shaft 10. The brake assemblies comprise an adjusting bolt 1, an adjusting nut 2, an anti-wear pad 3, a fixing plate 4, a support plate 5, an inner lining plate 7, a sleeve 6 and a spring 8. In this embodiment, each set of brake assemblies comprises two adjusting bolts 1, adjusting nuts 2, sleeves 6 and springs 8. Figure 1As shown, the fixing plate 4 is fixedly installed on the outer wall of the induced draft fan 11 by welding, and a through hole is symmetrically opened on the upper end of the fixing plate 4. The support plate 5 is fixedly installed on the inner wall of the induced draft fan 11 by welding, and the side wall of the support plate 5 is perpendicular to the inner wall of the induced draft fan 11. The two sleeves 6 are vertically symmetrically fixedly installed in the middle of the support plate 5. Of course, the support plate 5 and the two sleeves 6 can be generated by an integrated molding technology. The left ends of the two sleeves 6 pass through the induced draft fan 11 and extend into the through hole of the fixing plate 4, and the left end faces of the two sleeves 6 are both fixed to the fixing plate 4 is parallel to the left end face, the inner lining plate 7 is provided on the outer wall of the rotating shaft 10, the two adjusting bolts 1 are vertically fixed to the left end of the inner lining plate 7 by welding, and the spacing between the two adjusting bolts 1 is equal to the spacing between the two sleeves 6, the two adjusting bolts 1 are respectively located in the corresponding sleeves 6, and the two adjusting nuts 2 are respectively provided at one end of the adjusting bolts 1 extending out of the sleeve 6, the two springs 8 are respectively sleeved on the outer walls of the two adjusting bolts 1, and the two springs 8 are located between the support plate 5 and the inner lining plate 7, and are always in a compressed state, as shown in FIG. Figure 3 and Figure 4 The inner lining plate 7 and the anti-wear gasket 3 shown are both provided with 5 mounting holes 9, of which 4 mounting holes 9 are respectively located at the four corners of the inner lining plate 7 and the anti-wear gasket 3, and the other mounting hole 9 is located in the middle of the inner lining plate 7 and the anti-wear gasket 3. The anti-wear gasket 3 can be detachably mounted on the right end of the inner lining plate 7 through the mutual cooperation of bolts and the mounting holes 9.

[0028] like Figure 2 、 Figure 3 and Figure 4 The support plate 5, inner lining plate 7 and anti-wear gasket 3 shown are all arranged in an arc shape, and the right end of the anti-wear gasket 3 is in contact with the outer wall of the rotating shaft 10, the right end of the inner lining plate 7 is in contact with the left end of the anti-wear gasket 3, and the right end of the support plate 5 is in contact with the left end of the inner lining plate 7.

[0029] The specific implementation process is as follows:

[0030] When installing the brake assembly, the staff first opens two through holes in the outer casing of the induced draft fan 11, and the distance between the two through holes is equal to the distance between the two sleeves 6 on the support plate 5, welds the fixing plate 4 to the upper end of the outer casing of the induced draft fan 11 corresponding to the through hole, and then passes the sleeve 6 through the through hole, and fixes the support plate 5 to the inner wall of the induced draft fan 11 by welding. The anti-wear gasket 3 is detachably installed on the upper end of the inner lining plate 7 through the mutual cooperation of bolts and the mounting holes 9, and then welds the two adjusting bolts 1 to the upper end of the inner lining plate 7, and then respectively sleeves the two springs 8 on the outer wall of the adjusting bolt 1, and then passes the two butt bolts through the sleeve, and uses the adjusting nut 2 to lock the end of the adjusting bolt 1 extending out of the sleeve, repeats this operation, and symmetrically installs several brake assemblies on the outer wall of the rotating shaft 10 of the induced draft fan 11.

[0031] When the induced draft fan 11 needs to be braked, the staff uses a wrench to rotate the adjusting nuts 2 of each brake assembly, so that the corresponding adjusting bolts 1 extend into the induced draft fan 11, thereby pushing each inner lining plate 7 close to the rotating shaft 10, and then making the symmetrically arranged anti-wear gaskets 3 contact the outer wall of the rotating shaft 10. When the staff tightens each adjusting nut 2, the symmetrically arranged anti-wear gaskets 3 clamp the rotating shaft 10, thereby preventing the induced draft fan 11 from rotating when braked, thereby increasing the reliability of the braking of the induced draft fan 11.

[0032] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A induced draft fan brake device, characterized in that: It includes several brake assemblies, which are radially arranged on the outer wall of the rotating shaft. The brake assembly includes an adjusting bolt, an adjusting nut and an anti-wear gasket. The anti-wear gasket is arranged on the outer wall of the rotating shaft. The adjusting bolt is arranged at the end of the anti-wear gasket away from the rotating shaft, and the adjusting bolt passes through the induced draft fan casing. The adjusting nut is arranged at the end of the adjusting bolt extending out of the induced draft fan.

2. The induced draft fan brake device according to claim 1, characterized in that: The brake assembly also includes a fixing plate, which is arranged on the outer wall of the induced draft fan. The fixing plate is provided with a fixing hole, the adjusting bolt passes through the fixing hole, and the adjusting nut is arranged on one end of the adjusting bolt passing through the fixing plate.

3. The induced draft fan brake device according to claim 2, characterized in that: The brake assembly also includes a support plate, which is arranged on the inner wall of the induced draft fan. A sleeve is provided at one end of the support plate away from the rotating shaft. The end of the sleeve away from the support plate passes through the induced draft fan, and the adjusting bolt is located in the sleeve.

4. The induced draft fan brake device according to claim 3, characterized in that: The brake assembly also includes an inner lining plate, which is arranged on the outer wall of the rotating shaft, an anti-wear gasket is arranged on one end of the inner lining plate close to the rotating shaft, and an adjusting bolt is arranged on one end of the inner lining plate away from the rotating shaft.

5. The induced draft fan brake device according to claim 4, characterized in that: The brake assembly also includes a spring, which is sleeved on the outer wall of the adjusting bolt and located between the support plate and the inner lining plate.

6. The induced draft fan brake device according to claim 5, characterized in that: The inner lining plate and the anti-wear gasket are both provided with a plurality of mounting holes, and the inner lining plate and the anti-wear gasket are fixedly connected by bolts and the mounting holes.

7. The induced draft fan brake device according to claim 6, characterized in that: The support plate is fixedly installed on the inner wall of the induced draft fan by welding, and the side wall of the support plate is perpendicular to the inner wall of the induced draft fan.

8. The induced draft fan brake device according to claim 7, characterized in that: The support plate, inner lining plate and anti-wear gasket are all arranged in an arc shape, and the end of the anti-wear gasket close to the rotating shaft is in contact with the outer wall of the rotating shaft, the end of the inner lining plate close to the rotating shaft is in contact with the outer wall of the anti-wear gasket, and the end of the support plate close to the rotating shaft is in contact with the outer wall of the inner lining plate.

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