Automatic aligning device of stepping mechanism

Abstract

The utility model relates to an automatic aligning device of a stepping mechanism, which is characterized in that a guide groove is formed in the direction of a driven shaft of a stepping beam, a pressing plate is packaged below the guide groove, an upper guide plate and a lower guide plate are respectively arranged at the upper end and the lower end in the guide groove, and the lower guide plate is fixed on the top surface of the pressing plate. And a bearing seat is mounted between the upper guide plate and the lower guide plate in a sliding manner. The automatic aligning device is additionally arranged on the driven side of the walking beam, so that the chain is stressed uniformly and is not easy to break. And when the walking beams are not synchronous, the adjustment is convenient, and the downtime is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stepping beam transmission, in particular to an automatic centering device of a stepping mechanism. Background Art

[0002] The walking beam for casing line flaw detection is a three-stage chain transmission mechanism. The advantages of chain transmission are: it can maintain an accurate average transmission ratio, no sliding, and requires a small tension. The pressure acting on the shaft is also small, which can reduce the friction loss of the bearing. It has strong overload capacity and works well under low speed and heavy load. It can work under harsh environmental conditions such as high temperature and oil pollution. Disadvantages: The instantaneous transmission ratio is not constant and the transmission stability is poor. Additional dynamic loads, vibrations, impacts and noise are generated during operation, and the chain is easy to wear and elongate, resulting in poor transmission stability.

[0003] The current production line uses a chain-driven stepping mechanism. The weight of the pipe is too heavy, and the stepping beam and counterweight are heavy, which causes the stepping beam to have a large impact and the chain to be stretched. When the pipe is disconnected, the chain is broken, and the stepping beam is out of sync during the production process, the sprocket drive shaft is subjected to the greatest force, resulting in the transmission bearing seat fixing bolts being cut off frequently. When adjusting the stepping beam out of sync and replacing the chain, the center distance of the two sprockets is required to be 1600mm. When adjusting the center distance of the two sprockets, it is necessary to remove the upper cover device of the entire stepping beam device, remove the stepping beam and the counterweight device. Remove the broken bolts, adjust the position of the bearing seat, and replace the new bolts to re-fix. Install the stepping beam and the counterweight device, install the chain, adjust the chain tightness, and install the upper cover device. When the bearing seat bolts are not broken and the chain is stretched, it is necessary to loosen the stepping beam expansion sleeve to adjust the chain tightness. After adjusting the chain tightness. Tighten the expansion sleeve. Each time the flaw detection stepping beam fails, it takes 8 hours to fully adjust the synchronization to meet production requirements. This affects production efficiency. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an automatic centering device for a stepping mechanism, which can reduce the weight of the stepping beam and the counterweight. In the production process, the impact force of the stepping beam on the chains at all levels is reduced, which causes the chains to break. When the sprocket bearing seat is not stressed, the bearing seat bolts are prevented from breaking. The equipment damage maintenance time is reduced and the production efficiency is improved.

[0005] The technical solution adopted by the utility model to solve the technical problem is:

[0006] An automatic centering device for a stepping mechanism is provided, wherein a guide groove is formed in the direction of the driven shaft of the stepping beam, a pressure plate is packaged below the guide groove, an upper guide plate and a lower guide plate are respectively installed at the upper and lower ends of the guide groove, the lower guide plate is fixed on the top surface of the pressure plate, and a bearing seat is slidably installed between the upper guide plate and the lower guide plate.

[0007] Furthermore, two adjusting bolts are respectively installed on the left and right side walls of the guide groove.

[0008] Furthermore, the bearing seat has a front and a rear pressure cover, the bearing is installed between the two pressure covers, the two pressure covers are connected by bolts, and the upper guide plate and the lower guide plate are both located between the front and rear pressure covers.

[0009] Furthermore, the upper guide plate and the lower guide plate are both nylon plates.

[0010] Furthermore, both ends of the pressing plate are fixed to the walking beam via connecting bolts.

[0011] Furthermore, the adjusting bolt is an M16 bolt, and the connecting bolt is an M12 bolt.

[0012] Furthermore, the walking beam is made by welding 8-10 mm formed plates.

[0013] The advantages and positive effects of the utility model are:

[0014] 1. The utility model adds an automatic centering device on the driven side of the walking beam. When the chain is stretched and the sprocket is worn, and the center distance of the transmission shaft is not 1600mm, the center distance of the walking beam is automatically adjusted to make the chain evenly stressed and not easy to break. When the walking beam is not synchronized, it is convenient to adjust and save downtime.

[0015] 2. The utility model reduces the overall weight of the walking beam mechanism, and reduces the impact force of the walking beam itself on the chain. The pressure acting on the transmission shaft is low, which reduces the bearing force, reduces bearing damage and the cutting of the fixing bolts of the bearing seat, and reduces the downtime of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the fixed installation method of the driven shaft of the background technology;

[0017] Figure 2 for Figure 1 BB section view;

[0018] Figure 3 This is the structural diagram of the sliding installation method of the driven shaft of this application;

[0019] Figure 4 for Figure 3 AA section view. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited by them.

[0021] like Figure 3As shown, an automatic centering device for a stepping mechanism is provided, wherein a guide groove 5 is formed in the direction of the driven axis of the stepping beam 1, and a pressure plate 8 is encapsulated below the guide groove 5. Both ends of the pressure plate 8 are fixed to the stepping beam 1 by connecting bolts 7. An upper guide plate 10 and a lower guide plate 6 are respectively installed at the upper and lower ends of the guide groove 5, and the lower guide plate 6 is fixed to the top surface of the pressure plate 8. A bearing seat 4 is slidably installed between the upper guide plate 10 and the lower guide plate 6. Both the upper guide plate 10 and the lower guide plate 6 are nylon plates.

[0022] like Figure 4 As shown, the bearing seat 4 has a front pressure cover 41 and a rear pressure cover 42, and the bearing 3 is installed between the two pressure covers. The two pressure covers are connected by bolts, and the upper guide plate 10 and the lower guide plate 6 are both located between the front and rear pressure covers.

[0023] During the operation of the stepping beam 1, the bearing seat 4 slides in the guide groove 5 to automatically adjust the center of the transmission shaft. This reduces the force on the transmission chain and allows the stepping beam 1 to run smoothly without shaking. When the stepping beam 1 is left alone, the fixing bolts of the pressure plate 8 are broken, the force on the three-stage transmission shaft is small, and the fixing bolts of the bearing seat 4 are not cut off. During maintenance, you only need to replace the M12 bolts and re-fix the pressure plate 8 to start production. When the stepping beam 1 is not synchronized, you only need to loosen the M16 adjustment bolts 9 to adjust the sliding bearing seat 4 to the center position, tighten all chains, and adjust the elevation to fix the expansion sleeve. Loosen the top screw and start production. Reduce the overall weight of the stepping beam 1. Reduce the impact of the stepping beam 1 on the chain and the bearing seat 4. Cause equipment shutdown.

[0024] The utility model changes the driven shaft of the walking beam from a fixed mode to a sliding bearing seat form. During the operation of the walking beam, the bearing seat 4 automatically slides in the guide groove 5 to adjust the center position. The chain is evenly stressed. When the walking beam is out of control during the production process, the M12 bolt breaks and other parts are not damaged. Only the M12 bolt needs to be replaced during repair. Two M16 adjustment bolts 9 are installed on both sides of the guide groove 5. When the walking beam is not adjusted synchronously, the square bearing box is adjusted to the middle position with the M16 adjustment bolt 9, and the expansion sleeve is loosened to lower the walking beam to the lowest position. After tightening the expansion sleeve, the 16A chain needs to be tightened, and the height of the walking beam is adjusted. Then, the M16 adjustment bolt 9 is loosened outside the guide groove 5. The original adjustment of the walking beam takes a long time and is inconvenient to adjust. The chain is elongated and worn, and it is not easy to adjust the chain tightness. The new transformation mechanism reduces the failure time compared with the original design.

[0025] The utility model reduces the weight of the walking beam 1 and the counterweight 2 without affecting the on-site installation, and changes the driven pin of the walking beam into a sliding mode without changing the bearing model of the driven walking beam, so that the center position thereof is automatically adjusted during operation to meet the operation requirements.

[0026] The original flaw detection walking beam was 50mm thick and weighed 423kg. It was difficult to install and disassemble. According to the original walking beam size, the thickness was changed to 8mm formed plate and welded. The total weight is 81kg. The original counterweight weighed 216.2kg. According to the new walking beam design, the total weight of the counterweight is only 158kg. This is equivalent to reducing the overall walking beam by 400kg, reducing the impact on the chain.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. An automatic centering device for a stepping mechanism, characterized in that: A guide groove (5) is formed in the direction of the driven axis of the stepping beam (1), a pressure plate (8) is encapsulated below the guide groove (5), an upper guide plate (10) and a lower guide plate (6) are respectively installed at the upper and lower ends of the guide groove (5), the lower guide plate (6) is fixed on the top surface of the pressure plate (8), and a bearing seat (4) is slidably installed between the upper guide plate (10) and the lower guide plate (6).

2. The automatic centering device for a stepping mechanism according to claim 1, characterized in that: Two adjusting bolts (9) are respectively installed on the left and right side walls of the guide groove (5).

3. The automatic centering device for a stepping mechanism according to claim 2, characterized in that: The bearing seat (4) comprises a front pressure cover (41) and a rear pressure cover (42), a bearing (3) is installed between the two pressure covers, the two pressure covers are connected by bolts, and the upper guide plate (10) and the lower guide plate (6) are both located between the front and rear pressure covers.

4. The automatic centering device for a stepping mechanism according to claim 3, characterized in that: The upper guide plate (10) and the lower guide plate (6) are both nylon plates.

5. The automatic centering device for a stepping mechanism according to claim 4, characterized in that: Both ends of the pressing plate (8) are respectively fixed to the walking beam (1) via connecting bolts (7).

6. The automatic centering device for a stepping mechanism according to claim 5, characterized in that: The adjusting bolt (9) is an M16 bolt, and the connecting bolt (7) is an M12 bolt.

7. The automatic centering device for a stepping mechanism according to claim 6, characterized in that: The walking beam (1) is made by welding 8-10 mm formed plates.

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