Anti-backup fixing device for impeller lock

Abstract

The utility model relates to impeller lock adds anti -retreating fixing device, belongs to impeller lock pin anti -retreating technical field, including the screw rod and the back type wrench of impeller lock, the back type wrench includes round piece and spacing strip, the round piece fixed connection is in spacing strip top, the round piece is installed on the screw rod of impeller lock, spacing strip both sides all are provided with the spacing piece. Through back type wrench cooperation spacing piece to the screw rod of impeller lock is fixed fixed, effectively prevents the screw rod and retreats under the impeller impact vibration, solves the problem of impeller lock failure in the scene of no high -speed shaft brake maintenance, avoids the personal and equipment safety risk of operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of impeller locking pin anti-reverse technology, and in particular to the addition of an anti-reverse fixing device to the impeller lock. Background Technology

[0002] The impeller lock is a mechanical mechanism that uses the principle of screw rotation to extend and retract the locking pin. When it is necessary to lock the impeller, first brake the high-speed shaft, then use a wrench to rotate the screw on the impeller lock counterclockwise. The rotation of the screw will cause the pin of the impeller lock to insert into the impeller.

[0003] Under normal circumstances, because the high-speed shaft is also in a braking state when the impeller is locked, the impeller will not swing back and forth. Therefore, the impeller lock will not slip back without a stop mechanism. However, when performing maintenance work such as gearbox repair or high-speed brake disc replacement, which prevents the high-speed shaft from braking, the transmission chain loses its braking function. Furthermore, because the locking hole of the impeller locking disc is slightly larger than the impeller locking pin, the impeller will slightly impact the impeller lock under the influence of wind. This causes the locking pin to gradually slip back under continuous vibration, leading to impeller lock failure. If work is being done on the gearbox or high-speed brake disc at this time, it will seriously threaten the safety of personnel and equipment. Utility Model Content

[0004] This utility model addresses the problems in the prior art by providing an anti-reverse fixing device for the impeller lock, which is achieved through the following technical solution: An anti-reverse fixing device is added to the impeller lock, including the screw of the impeller lock and a return wrench. The return wrench includes a circular piece and a limiting strip. The circular piece is fixedly connected to the top of the limiting strip and is installed on the screw of the impeller lock. Limiting pieces are provided on both sides of the limiting strip.

[0005] Furthermore, a square through groove is provided in the middle of the circular piece, and the square through groove is fitted onto the outer ring of the screw of the impeller lock.

[0006] Furthermore, a support plate is provided on the rear side of the back wrench, and a fixing through groove is provided on both sides of the support plate. A hexagonal bolt is provided in the fixing through groove, and a washer is provided between the hexagonal bolt and the support plate. The limiting plate is fixedly connected to the support plate.

[0007] Furthermore, each of the two limiting plates has a limiting groove, and a butterfly screw is inserted into the limiting groove on both sides. The threaded end of the butterfly screw is threadedly connected to a butterfly nut, and the limiting strip is disposed between the bracket plate and the butterfly screw.

[0008] In summary, the beneficial technical effects of this utility model are as follows: The impeller lock screw is fitted into the square through groove of the back wrench, and the clamping and fixing with the limit plate and the butterfly screw form a double limit structure, which effectively prevents the screw from retracting under the impact and vibration of the impeller. This solves the problem of impeller lock failure in the maintenance scenario without high-speed shaft brake, and avoids personal and equipment safety risks to operators. Attached Figure Description

[0009] Figure 1 This is a structural schematic diagram used to illustrate the overall structure of this utility model.

[0010] Figure 2 This is a structural diagram used to demonstrate the back wrench and the bracket plate.

[0011] Reference numerals: 1. U-shaped wrench; 2. Circular piece; 201. Square through slot; 3. Limiting strip; 4. Limiting piece; 5. Bracket piece; 6. Fixing through slot; 7. Hex bolt; 8. Washer; 9. Limiting through slot; 10. Butterfly screw; 11. Butterfly nut. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Example like Figure 1-2 As shown, the impeller lock of this utility model is equipped with an anti-reverse fixing device, which includes the screw of the impeller lock and a return wrench 1. The return wrench 1 includes a circular piece 2 and a limiting strip 3. The circular piece 2 is fixedly connected to the top of the limiting strip 3. The circular piece 2 is installed on the screw of the impeller lock. Limiting pieces 4 are provided on both sides of the limiting strip 3.

[0014] A square through groove 201 is provided in the middle of the circular piece 2, and the square through groove 201 is fitted onto the outer ring of the screw of the impeller lock.

[0015] The back wrench 1 is provided with a bracket piece 5. The bracket piece 5 has a fixing groove 6 on both sides. A hexagonal bolt 7 is provided in the fixing groove 6. The bracket piece 5 is fixed to the original bolt hole of the impeller lock by the hexagonal bolt 7. A washer 8 is provided between the hexagonal bolt 7 and the bracket piece 5. The limiting piece 4 is fixedly connected to the bracket piece 5.

[0016] Both of the limiting plates 4 have limiting slots 9, and butterfly screws 10 are inserted into the limiting slots 9 on both sides. The threaded end of the butterfly screw 10 is threadedly connected to a butterfly nut 11. The limiting strip 3 is disposed between the bracket plate 5 and the butterfly screw 10.

[0017] The specific implementation method of this example is as follows: The bracket piece 5 is attached to the impeller lock housing, the fixing through groove 6 is aligned with the original bolt hole, the hex bolt 7 is inserted and the washer 8 is added, and the bolt is tightened with a wrench to ensure that the bracket piece 5 is firm and does not wobble. The square through groove 201 of the circular piece 2 is fitted onto the square head of the impeller lock screw, so that the limiting strip 3 is between the two limiting pieces 4 and is attached to the bracket piece 5. The butterfly screw 10 is passed through the limiting through groove 9 of the limiting pieces 4 on both sides, and the butterfly nut 11 is put on. The nut is manually rotated until the limiting strip 3 is clamped, ensuring that the limiting strip 3 cannot move laterally, thereby restricting the rotation of the screw.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

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