Pinch roll with adjustable pinch center

Abstract

The utility model relates to a pinch roll with an adjustable pinch center. The pinch roll comprises an upper roll and a lower roll, the upper roller comprises a first roller shaft and a first roller; the first roller shaft is connected with the first roller through a key and a key slot; threads are arranged on the two sides of the key groove of the first roller shaft, and a locking nut is connected with the threads on the two sides of the key groove in a matched mode to clamp and fix the first roller. The lower roller comprises a second roller shaft and a second roller; the second roller shaft is connected with the second roller through a key and a key slot; threads are arranged on the two sides of the key groove of the second roller shaft, and a locking nut is connected with the threads on the two sides of the key groove in a matched mode to clamp and fix the second roller. The left and right positions of the first roller and the second roller are adjusted by adjusting the position of the locking nut, so that the pinch center of the pinch roller is adjusted; according to the adjusting structure, the mounted bearing tensioning sleeve does not need to be disassembled, time is saved, and the operation efficiency of adjusting the clamping center is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially, relates to a kind of pinch roll of adjustable pinch center. BACKGROUND

[0002] Steel pipe needs to be detected by ultrasonic flaw detector in manufacturing process, to detect whether there is defect in steel pipe.

[0003] The ultrasonic flaw detector currently used includes transverse detection system, longitudinal detection system, pinch roll system.

[0004] It is mainly composed of lifting screw, lifting motor, pinch roll, worm gear reduction motor, bearing with seat etc. The upper and lower rollers of pinch roll are fixed by bearing with seat expansion sleeve. When the pinch center of pinch roll deviates left and right (the center line position of the upper and lower rollers of pinch roll is not in a vertical direction), bearing with seat expansion sleeve needs to be disassembled first, and then the left and right positions of upper roller and lower roller are adjusted respectively. The above-mentioned adjustment mode of pinch center is more complicated and the adjustment time is also longer. In addition, due to the compact structure of the pinch roll system, the maintenance operation space is small, and the adjustment difficulty is large, which further leads to low adjustment efficiency. SUMMARY

[0005] The utility model provides a kind of pinch center adjustable pinch roll, which can solve the problem of low adjustment efficiency of pinch center.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A kind of pinch center adjustable pinch roll, comprising upper roller and lower roller;The upper roller includes first roller shaft and first roller;First roller shaft is connected with first roller by key and keyway;Thread is arranged on both sides of the keyway of first roller shaft, and locking nut is connected with the thread on both sides of the keyway, so as to clamp and fix first roller;

[0008] The lower roller includes second roller shaft and second roller;Second roller shaft is connected with second roller by key and keyway;Thread is arranged on both sides of the keyway of second roller shaft, and locking nut is connected with the thread on both sides of the keyway, so as to clamp and fix second roller.

[0009] The number of locking nuts on one side of the keyway is more than two.

[0010] The pinch roll with adjustable pinch center further comprises a retreat-stop washer; the retreat-stop washer comprises a washer body, a through hole is arranged in the center of the washer body, a protrusion is arranged on the inner edge of the through hole, and a plurality of clamping pieces are arranged on the outer edge of the washer body; a retreat-stop groove is arranged on the thread of the first roller shaft and the second roller shaft; the washer body is respectively sleeved on the threads on the two sides of the key groove, the protrusion is embedded in the retreat-stop groove, and the clamping pieces are bent and attached to the outer side of the locking nut; the washer body is located between the first roller and the locking nut or between the second roller and the locking nut.

[0011] The number of the clamping pieces on the outer edge of the washer body is 2, 4 or 6.

[0012] The middle part of the first roller and the second roller is respectively provided with a V-shaped rotary groove; the included angle of the V-shaped rotary groove of the first roller is 140-150 degrees; and the included angle of the V-shaped rotary groove of the second roller is 140-150 degrees.

[0013] The material of the locking nut is 45 steel.

[0014] Compared with the prior art, the pinch roll with adjustable pinch center has the following beneficial effects:

[0015] 1) The first roller shaft and the second roller shaft are provided with threads, the left and right positions of the first roller and the second roller are adjusted by adjusting the position of the locking nut, so that the adjustment of the pinch center of the pinch roll is realized; the adjusting structure does not need to disassemble the expansion sleeve of the bearing with a seat, time is saved, and the operation efficiency of adjusting the pinch center is improved.

[0016] 2) The number of the locking nuts on one side of the key groove is more than two, which is beneficial to improve the locking effect and avoid the change of the left and right positions of the first roller and the second roller during work.

[0017] 3) The retreat-stop washer is arranged in the pinch roll, the locking bolt is prevented from being loosened, and the locking effect is improved. DRAWINGS

[0018] The drawings that form a part of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Fig. 1 is a structural schematic view of the pinch roll with adjustable pinch center.

[0020] Fig. 2 is a structural schematic view of the first roller shaft or the second roller shaft.

[0021] Fig. 3 is a structural schematic view of the retreat-stop washer.

[0022] Reference signs:

[0023] In the figure: 1, upper roller; 2, lower roller; 3, key; 4, keyway; 5, locking nut; 6, retreat stop washer; 7, retreat stop groove; 11, first roller shaft; 12, first roller; 21, second roller shaft; 22, second roller; 61, washer body; 62, protrusion; 63, card. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model will be further described below in combination with the drawings:

[0025] As Figs. 1 to 3 shown, the utility model provides a pinch center adjustable pinch roller, including upper roller 1 and lower roller 2. Upper roller 1 includes first roller shaft 11 and first roller 12. First roller shaft 11 is connected with first roller 12 through key 3 and keyway 4, and the both sides of the keyway 4 of first roller shaft are provided with threads, locking nut 5 is connected with the threads on the both sides of the keyway of first roller shaft in a matched mode, and first roller 12 is clamped and fixed.

[0026] Lower roller 2 includes second roller shaft 21 and second roller 22. Second roller shaft 21 is connected with second roller 22 through key and keyway, and the both sides of the keyway 4 of second roller shaft are provided with threads, locking nut 5 is connected with the threads on the both sides of the keyway of second roller shaft in a matched mode, and second roller 22 is clamped and fixed.

[0027] The number of locking nuts 5 on the single side of keyway 4 is two, which is conducive to improving locking effect. The material of locking nut is 45 steel.

[0028] The middle part of first roller 12 and second roller 22 is provided with V-shaped rotary groove. The included angle of the V-shaped rotary groove of first roller 12 is 140 degrees, which is used for pressing the steel pipe on the V-shaped rotary groove of second roller 22, and the included angle of the V-shaped rotary groove of second roller is 140 degrees, which can be used for clamping and feeding the steel pipe with the diameter of 60 ~ 180 mm.

[0029] The utility model provides a pinch center adjustable pinch roller still includes retreat stop washer 6. Retreat stop washer 6 includes washer body 61, is equipped with the protrusion 62 in the inner edge of through -hole in the center of washer body 61, and the outer edge of washer body 61 is equipped with 6 cards 63. The threads of first roller shaft 11 and second roller shaft 21 are all equipped with retreat stop groove 7. Washer body 61 is respectively covered on the threads on the both sides of keyway, the protrusion 62 is embedded in retreat stop groove 7, and the card 63 is bent and attached on the outside of locking nut 5, to ensure that locking nut 5 does not back off. Washer body 61 is located between first roller 12 and locking nut 5 or between second roller 22 and locking nut 5.

[0030] The working process of the utility model provides a pinch center adjustable pinch roller:

[0031] When the pinch center of the pinch roll needs to be adjusted, first, the locking nuts 5 on both sides of the key groove of the second roller shaft 21 are adjusted to adjust the position of the second roller 22 on the second roller shaft 21; then the position of the first roller 12 on the first roller shaft 11 is adjusted according to the position of the second roller 22, to ensure that the center line positions of the second roller 22 and the first roller 12 are in the same vertical direction; finally, a test steel pipe is used for testing, and if the test data is normal, it indicates that the pinch center adjustment is completed; if the test data is lost or abnormal, the adjustment needs to be performed again until the data is normal.

[0032] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model. In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the utility model will not further describe various possible combination manners. Furthermore, various different embodiments of the utility model can also be combined in any manner, as long as it does not deviate from the idea of the utility model, and it should also be considered as the disclosed content of the utility model.

Claims

1. A pinch roller with an adjustable pinch center, characterized in that, It includes an upper roller and a lower roller; the upper roller includes a first roller shaft and a first roller; the first roller shaft is connected to the first roller via a key and a keyway; the keyway of the first roller shaft is provided with threads on both sides, and a locking nut is engaged with the threads on both sides of the keyway to clamp and fix the first roller. The lower roller includes a second roller shaft and a second roller; the second roller shaft is connected to the second roller via a key and a keyway; the keyway of the second roller shaft is threaded on both sides, and a locking nut is engaged with the threads on both sides of the keyway to clamp and fix the second roller.

2. The pinch roller with adjustable pinch center according to claim 1, characterized in that, The number of locking nuts on one side of the keyway is two or more.

3. A pinch roller with adjustable pinch center according to claim 1, characterized in that, It also includes a backstop washer; the backstop washer includes a washer body, a through hole in the center of the washer body, a protrusion in the inner edge of the through hole, and multiple clips in the outer edge of the washer body; both the first roller and the second roller have backstop grooves on their threads; the washer body is respectively fitted onto the threads on both sides of the keyway, the protrusion is embedded in the backstop groove, and the clips are bent and attached to the outside of the locking nut; the washer body is located between the first roller and the locking nut or between the second roller and the locking nut.

4. A pinch roller with an adjustable pinch center according to claim 3, characterized in that, The number of cards on the outer edge of the gasket body is 2, 4 or 6.

5. A pinch roller with adjustable pinch center according to claim 1, characterized in that, Both the first roller and the second roller have a V-shaped rotating groove in the middle; the included angle of the V-shaped rotating groove of the first roller is 140~150 degrees; the included angle of the V-shaped rotating groove of the second roller is 140~150 degrees.

6. A pinch roller with adjustable pinch center according to claim 1, characterized in that, The locking nut is made of 45 steel.

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