Elastic pressing type steel pipe outer circle polishing device

Abstract

The utility model discloses an elastic pressing type steel pipe outer circle polishing device which comprises a base arranged in the length direction of a machined steel pipe and is characterized in that a plurality of pairs of supporting wheels, namely a left supporting wheel and a right supporting wheel, are arranged on the base in the length direction of the steel pipe, the left supporting wheel is a driving wheel, the right supporting wheel is a driven wheel, and the driven wheel is a driven wheel. The axle of the right supporting wheel and the center line of the steel pipe form an included angle; rotating arms, namely a left rotating arm and a right rotating arm, which are arranged in pairs are respectively arranged on two sides of the steel pipe in the length direction, and grinding machines are arranged on the rotating arms. The problems of difficulty in end clamping, coaxiality adjustment, polishing clamping stability and the like existing in stainless steel cast pipe blank surface cleaning operation are solved, the phenomenon that a grinding machine explodes due to shaking, deviation and the like is overcome, the best polishing force can be obtained through adjustment by means of self weight, an elastic belt and an elastic pressing type rotating arm clamping, operation is easy, the supporting strength and bearing capacity are large, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technology of tube surface processing equipment, in particular to an elastic pressing type outer circle polishing device for steel pipes. Background Technique

[0002] There are various different designs of tube surface grinding and polishing devices in the disclosed technology. For example, a pneumatic type outer circle grinding and polishing machine for steel pipes proposed in the patent publication number CN105196146B includes a fixed feeding device, a stator with a stepped hole in the inner hole, and a rotor support frame; a frustum-shaped rotor that can rotate around its own axis is eccentrically arranged in the stator. A cavity is formed between the larger diameter end of the rotor and the larger diameter end of the stator. The smaller diameter end of the rotor is connected to the rotor support frame. Multiple blades are evenly distributed at the larger diameter end of the rotor, and three polishing head device installation holes communicating with the inner hole of the rotor are also evenly distributed. The blades can reciprocate along the radial direction of the rotor diameter; an air inlet and an air outlet communicating with the cavity are provided on the side wall of the stator; a reciprocating polishing head device is arranged in the polishing head device installation hole. This polishing machine can perform rust removal and scale removal operations on the expansion joint and welding parts of U-shaped heat exchange tubes and tube plates, as well as the splicing joint positions of other curved round tube-shaped workpieces. Another example is the patent publication number CN115351691A, a surface polishing device for processing stainless steel steel pipes. A loading box for stacking multiple steel pipes is arranged on one side of the base. A discharging mechanism for releasing the steel pipes is arranged at the bottom outlet end of the loading box. A feeding mechanism in contact with the discharging mechanism is arranged on the base. The feeding mechanism transports the steel pipes to the other side of the base and clamps the steel pipes. A first polishing mechanism is arranged on the other side of the base, and a second polishing mechanism is arranged on the other side of the base. This device transports the steel pipes to the other side of the base and clamps the steel pipes through the feeding mechanism. The first polishing mechanism polishes the inner circumferential side wall of the clamped steel pipe, and the second polishing mechanism polishes the outer circumferential side wall of the clamped steel pipe. The polished steel pipes flow out and are collected through the discharging plate. For large-caliber stainless steel casting pipes, due to their large diameter, if the end needs to be clamped and rotated, a very large clamping and rotating mechanism needs to be configured. Moreover, due to the lack of surface accuracy at the end of the casting pipe, not only is the clamping and adjustment difficult, but also during grinding and polishing, the stability of the open length section far from the clamping end is poor, and jitter, deviation, etc. can all cause the polishing operation to not proceed smoothly. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and provide an elastic pressing type outer circle polishing device for steel pipes, which has the characteristics of open tube body rotation, propulsion drive mode, self-weight + elastic pressing type rotating arm clamping, adjustable moderate force polishing, no need for end clamping and pressing, simple operation, safety and reliability, etc.

[0004] The above technical problems of the present utility model are mainly solved by the following technical solutions: A spring-loaded outer circle polishing device for steel pipes includes a base arranged along the length direction of the steel pipe to be processed. It is characterized in that a plurality of pairs of supporting wheels, namely a left supporting wheel and a right supporting wheel, are arranged along the length direction of the steel pipe on the base. The left supporting wheel is a driving wheel, and the right supporting wheel is a follower wheel, and the wheel axle of the right supporting wheel forms an angle with the center line of the steel pipe. Along both sides of the length direction of the steel pipe, there are respectively arranged paired rotating arms, namely a left rotating arm and a right rotating arm, and a grinding wheel is arranged on the rotating arm.

[0005] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, the bottom end of the rotating arm is hinged on the base, and a limiting mechanism for the rotating angle of the rotating arm is arranged on the base.

[0006] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, an elastic belt is connected to the top ends of the left rotating arm and the right rotating arm, and the length of the elastic belt is adjustable.

[0007] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, the rotating arm rotation angle limiting mechanism arranged on the base includes an outer limiting body located outside the rotating arm and an inner limiting body located inside the rotating arm.

[0008] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, the position of the grinding wheel along the length direction of the rotating arm is adjustable.

[0009] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, the supporting wheels and the rotating arms are arranged at the nearest points.

[0010] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, bearing seats are respectively arranged on both sides of the supporting wheels.

[0011] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, the angle formed by the wheel axle of the right supporting wheel and the center line of the steel pipe is 1 to 10 degrees.

[0012] In the above-mentioned spring-loaded outer circle polishing device for steel pipes, preferably, one end of the elastic belt is fixed to the top end of the left rotating arm or the right rotating arm, and the other end is movably positioned at the top end of the right rotating arm or the left rotating arm, and a belt take-up device is arranged at the movably positioned end.

[0013] This technical solution is mainly designed from the following aspects:

[0014] First, the self-rotation of the steel pipe to be processed: The steel pipe is naturally supported by a plurality of pairs of supporting wheels arranged along the length direction of the steel pipe on the base. The left row of supporting wheels is connected in series by a transmission shaft as a driving wheel, and the right row of supporting wheels is a follower wheel. The common friction of the left supporting wheel and the right supporting wheel on the pipe forms the rotation power of the steel pipe.

[0015] Second, the forward movement of the steel pipe workpiece: The points where the grinders for polishing in this device are arranged along the length direction of the steel pipe are stationary. The left and right support wheels that support the steel pipe drive the steel pipe. The axle of the right support wheel forms an angle with the center line of the steel pipe, so that all the right support wheels generate an axial thrust on the steel pipe during rotation, causing the steel pipe to move forward while being polished. The angle formed by the axle of the right support wheel and the center line of the steel pipe is adjustable within the range of 1 to 10 degrees, and the forward speed is obtained according to the actual surface condition of the steel pipe.

[0016] Third, the clamping of the steel pipe workpiece during the polishing process: On both sides along the length direction of the steel pipe in this device, there are respectively arranged left and right rotating arms arranged in pairs, and the grinders are arranged on the rotating arms. When the rotating arm turns to the polishing side, the rotating arm presses against the steel pipe under the action of its own weight and the weights of attached components such as the grinder, generating a squeezing force on the steel pipe. However, vibrations will occur during polishing and grinding. If not controlled, the phenomenon of the rotating arm flipping is likely to occur. Therefore, elastic bands are provided at the tops of the left and right rotating arms in this device. These elastic bands not only have a certain elasticity to keep the rotating arms stable during long-term operation, but also their lengths are adjustable to meet the surface polishing of steel pipes of different specifications. Further, limit mechanisms for the rotation angle of the rotating arm are respectively provided at the front and rear positions of the base hinged at the bottom end of the rotating arm to ensure the position safety of the rotating arm.

[0017] Others: The position of the grinder in this solution is adjustable along the length direction of the rotating arm, that is, the height direction, which can adapt to the polishing operations of steel pipes with different diameters and can also select more reasonable polishing points. The support wheels and the rotating arms are arranged close to each other, and bearing seats are respectively provided on both sides of the support wheels, etc., to form a comprehensive basic component with high support strength and high load-bearing capacity.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: It solves the difficult problems such as end clamping, coaxiality adjustment, and polishing clamping stability existing in the surface cleaning operation of stainless steel cast pipe blanks, overcomes the phenomenon of grinder burst caused by jitter, offset, etc., and can adjust the best polishing force with self-weight + elastic band + spring-loaded rotating arm clamping. It is simple to operate, has high support strength and load-bearing capacity, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present utility model.

[0020] Figure 2 is a structural schematic diagram of the working state of the present utility model.

[0021] Figure 3 is Figure 1 the top view (steering) structural schematic diagram of

[0022] Figure 4 isFigure 3 Schematic diagram of the partially enlarged structure at position M in the middle.

[0023] In the figure: 1 - base, 2 - left rotating arm, 3 - right rotating arm, 4 - left supporting wheel, 5 - right supporting wheel, 6 - inner limiting body, 7 - outer limiting body, 8 - elastic band, 9 - tape winder, 10 - steel pipe, 11 - grinding wheel, 12 - transmission shaft, 13 - main driving device, 14 - bearing seat. Specific implementation mode

[0024] The technical solution of the present utility model will be further specifically described below through embodiments in conjunction with the drawings.

[0025] In this embodiment, a spring - pressed outer - circle polishing device for steel pipes is provided. Refer to Figure 1 、 Figure 3 , a base 1 is arranged along the length direction of the workpiece steel pipe 10. The length, width and height dimensions of the base 1 should meet the actual needs of loading, unloading and rotating the steel pipe 10. Along the length direction of the steel pipe 10 on the base 1, 9 pairs of supporting wheels are provided, namely the left supporting wheel 4 and the right supporting wheel 5, and the distance between each pair of supporting wheels is 1 meter. Among them, the left supporting wheel 4 is driven by the main driving device 13 to drive the transmission shaft 12 as a driving wheel, and the right supporting wheel 5 is a follower wheel.

[0026] At the same time, rotating arms are respectively arranged on both sides along the length direction of the steel pipe 10 in pairs, a total of 8 pairs, namely the left rotating arm 2 and the right rotating arm 3, and a grinding wheel 11 is arranged on each rotating arm.

[0027] The above - mentioned supporting wheels and rotating arms are arranged near - point under the condition of ensuring no interference with each other. The diameters of all supporting wheels are equal.

[0028] Bearing seats 14 are respectively arranged on both axial sides of all supporting wheels. Among them, the axle of the right supporting wheel 5 forms an angle with the center line of the steel pipe 10, and the formed angle Q can be selected from 1 to 10 degrees, as shown in Figure 4 .

[0029] Furthermore, the bottom end of the rotating arm is hinged on the base 1, and a limiting mechanism for the rotating angle of the rotating arm is arranged on the base. The limiting mechanism includes an outer limiting body 7 located outside the rotating arm and an inner limiting body 6 located inside the rotating arm, and the radial position of the inner limiting body 6 can be adjusted. During the polishing operation, the inner limiting body 6 does not support the rotating arm, but only limits the extreme position of the rotating arm. When the device is in a non - working state, the outer limiting body 7 supports the rotating arm.

[0030] Furthermore, elastic bands 8 are connected to the tops of the left rotating arm 2 and the right rotating arm 3, and the length of the elastic bands 8 is adjustable. Specifically, this is achieved by a tape winder 9: one end of the elastic band 8 is fixed to the top of the left rotating arm 2 or the right rotating arm 3, and the other end is movably positioned at the top of the right rotating arm 3 or the left rotating arm 2. The movably positioned end is provided with a tape winder 9. The tape winder 9 is provided with a cylinder body for curling the elastic band 8. A crank is provided on the cylinder body, and a one-way ratchet and a manual clutch are provided on the cylinder shaft to prevent backward movement during tightening. After manually opening the clutch, the cylinder body is in a free state, thereby driving the elastic band 8 to unfold to the working position.

[0031] In addition, the position of the grinding wheel 11 along the length direction of the rotating arm is adjustable, that is, the grinding wheel 11 can obtain different working height positions.

[0032] Working principle and use:

[0033] Refer to Figure 1 again for the non-working state, and the working state is as shown in Figure 2 .

[0034] The steel pipe 10 to be processed is placed on the support body composed of the left support wheel 4 and the right support wheel 5. The center of gravity of the circular steel pipe 10 automatically aligns in a completely free state. When the left support wheel 4, which serves as the driving wheel, is driven by the main driving device 13, the steel pipe 10 is driven through friction to rotate, that is, to rotate on its own axis, and the right support wheel 5 follows. During the rotation of the steel pipe 10 on its own axis, since the axis of the right support wheel 5 forms an angle with the center line of the steel pipe 10, therefore, all the right support wheels 5 generate an axial thrust on the steel pipe 10. Through this thrust, the steel pipe 10 moves in the output direction, thereby realizing the combined action of the rotation and axial movement of the steel pipe 10.

[0035] During work, first loosen the elastic band 8, press the rotating arms with the grinding wheels 11 symmetrically arranged against both sides of the steel pipe 10. When the grinding wheel touches the surface of the steel pipe 10, lock the elastic band 8 to make the corresponding rotating arms in a tensioned state, so as to apply a limited force to press the steel pipe 10 during polishing, and safely and reliably complete the task of polishing the surface of the steel pipe 10.

[0036] The above embodiments are descriptions of the present invention, not limitations on the present invention. Any simple transformation of the structure of the present invention by those of ordinary skill in the art without departing from the principles of the technical solution and without creative labor belongs to the protection scope of the present invention.

Claims

1. A spring-loaded steel pipe outer cylindrical polishing device, comprising a base (1) arranged along the length direction of a steel pipe (10) to be processed, characterized in that a plurality of pairs of supporting wheels are arranged on the base along the length direction of the steel pipe, namely a left supporting wheel (4) and a right supporting wheel (5), wherein the left supporting wheel is a driving wheel, the right supporting wheel is a follower wheel, and the wheel axle of the right supporting wheel forms an angle with the center line of the steel pipe; and rotating arms arranged in pairs are respectively arranged on both sides along the length direction of the steel pipe, namely a left rotating arm (2) and a right rotating arm (3), and a grinding wheel (11) is arranged on the rotating arm.

2. The spring-pressed steel pipe outer cylindrical polishing device according to claim 1 is characterized in that: The bottom end of the rotating arm is hinged on a base (1), and a limiting mechanism for the rotation angle of the rotating arm is provided on the base.

3. A spring-pressed steel pipe outer cylindrical polishing device according to claim 1 or 2, characterized in that: The top ends of the left rotating arm (2) and the right rotating arm (3) are connected with elastic bands (8), and the length of the elastic bands is adjustable.

4. The spring-pressed steel pipe outer cylindrical polishing device according to claim 2 is characterized in that: The rotating arm rotation angle limiting mechanism provided on the base (1) comprises an outer limiting body (7) located outside the rotating arm and an inner limiting body (6) located inside the rotating arm.

5. A spring-pressed steel pipe outer cylindrical polishing device according to claim 1 or 2, characterized in that: The position of the grinding machine (11) along the length direction of the rotating arm is adjustable.

6. The spring-pressed steel pipe outer cylindrical polishing device according to claim 1 is characterized in that: The support wheel and the rotating arm are arranged close to each other.

7. A spring-pressed steel pipe outer cylindrical polishing device according to claim 1 or 2, characterized in that: Bearing seats (14) are respectively arranged on both sides of the supporting wheel.

8. The spring-pressed steel pipe outer cylindrical polishing device according to claim 1 is characterized in that: The angle formed between the wheel axle of the right supporting wheel (5) and the center line of the steel pipe is 1 to 10 degrees.

9. The spring-pressed steel pipe outer cylindrical polishing device according to claim 3 is characterized in that: One end of the elastic band (8) is fixed to the top of the left rotating arm (2) or the right rotating arm (3), and the other end is movably positioned at the top of the right rotating arm or the left rotating arm. The movably positioned end is provided with a belt take-up device (9).

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