RU2481165C2 - Truck and method of transfer of drive spindle for rolling mill roll - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: set off invention relates to rolling mill machinery, particularly, to truck 100 for transfer of drive spindle 200 of rolling mil roll 300 and to method of operating said truck. Flat truck incorporates running gear 105 to run under said drive spindle. Said truck is composed of lifting truck with first carrier 110 and first drive unit 120. First drive serves to lift first carrier under drive spindle and to down first drive, is required, along with said spindle relative to neutral position.

EFFECT: alternative design versions.

12 cl, 5 dwg

Description

The invention relates to a trolley for transporting at least one drive spindle for a rolling mill roll and to a method for operating the trolley.

Such trolleys are in principle known in the art. Thus, from DE 2602655 a method and a device for installing and removing a drive spindle of a rolling stand bed are known. This method is characterized in that the spindle, after removing the work rolls from the bed of the rolling stand, is transported with the support of the slide through the opening in the bed of the rolling stand from the drive side to the service side, and vice versa. The boom is rotatably mounted on a slide, and the drive spindles for transportation are suspended using loops on the boom. Therefore, the device according to this document is made sufficiently high, at least higher than the drive spindles.

JP 55094714 discloses a transport trolley for replacing spindles for work rolls of a rolling stand. The transport trolley can be moved on rails in the rolling direction through the bed of the rolling stand. The trolley includes a transport frame in which the upper drive spindle and the lower drive spindle are fixed at the top. The trolley, depending on the circumstances, together with the spindles, is moved by means of a pulling cable through the rolling stand.

The objective of the invention is to provide an alternative trolley and an alternative method for transporting the working spindle for the roll of the bed of the rolling stand.

This problem in terms of "device" is solved by the subject of paragraph 1 of the claims. Accordingly, the trolley is characterized in that it is designed as a lifting trolley with a first carrier and with a first drive unit, while the first drive unit serves to raise or lower the first carrier device, if necessary together with the drive spindle, in a neutral position.

The neutral position in the sense of this invention denotes the position of the first and / or second supporting device in which the total height of the trolley together with both supporting devices is minimal, that is, the trolley is as flat as possible. Therefore, raising or lowering only one of the supporting devices leads to an increase in the total height of the trolley.

The claimed trolley is made so flat that it can be moved (fed) under the drive spindle. The claimed embodiment as a lifting trolley with a first load-bearing device allows the lifting of the load-bearing device directly under the drive spindle to be advantageously so that it can be laid directly on the load-bearing device without the need for a crane and can be transported away by the truck.

For the further installation of a new or refurbished drive spindle between the rolling stand and the drive device for the rolling stand, in particular the gear stand reducer, the sequence of steps occurs in the reverse order. First, the drive spindle is transported on a carrier to the area between the rolling stand and the gear stand reducer. There it is lifted with the help of a lifting carriage, respectively, of a lifting support device to the required height, in order to dock there with the gear stand gear and with the spindle receiving elements of the rolling stand.

According to a first embodiment, the carriage has a second carrier device that is integrated in the first carrier device 110 and, together with the first carrier device 110, is lowered and raised relative to the neutral position. The presence of two load-bearing devices moving in height relative to each other has the advantage that, with the help of a lifting trolley, large heights can be reached which the supporting devices must be lifted to receive working spindles, without the lifting trolley having a negative impact in the sense its flat design, that is, it was performed with a greater minimum height.

The second carrier with the second drive unit is preferably fully integrated in height into the original height of the lifting carriage, respectively, in the first carrier.

The above problem is solved further due to the method of operation of the trolley. The advantages of this method correspond essentially to the advantages indicated above with respect to the trolley.

As particularly preferred, it should be mentioned, of course, that the first device, in particular with the help of a crank-knee or articulated lifting system of the “scissors” type, can not only rise above the neutral position of the cart, but also fall below this neutral position. In the neutral position or in the raised position, the trolley can move along the floor of the rolling mill in which the rolling mill is located. Inside the rolling stand, the supporting devices can fall below the neutral position without colliding with the lower backup roll, in particular after it has lowered itself earlier. Lowering the supporting devices below the neutral position favorably ensures the movement of the trolley together with the supporting devices below the head of the drive spindle; in the neutral position of their load-bearing devices, the trolley would not be able, as a rule, to move under the head of the drive spindles.

As an advantage, the first and / or second carrier devices, at least in their neutral position, can accordingly be blocked; load-bearing devices give the trolley in the locked position significantly more stability (torsional stiffness) than in the unlocked position.

Other preferred embodiments of the trolley and the method of its operation are the subject of the dependent claims.

Below is a description and drawings, which show:

Figure 1 represents the working spindles in a mounted state between the rolling stand and the gear stand gear;

Figure 2 - trolley according to the invention;

Figure 3 - entry of the trolley through the rolling stand;

Figure 4 - lowering, in particular, the first carrier device below the neutral position;

Figure 5 - moving the cart with the carrier down under the head of the drive spindle.

The following is a detailed description of the invention with reference to these drawings in the form of embodiments. In all the drawings, the same technical elements are denoted by the same reference numerals.

Figure 1 shows two drive spindles 200, which are located between the rolling stand 300 and the drive device 400, in particular, a gear stand reducer for driving the working spindles. The drive spindles serve to drive the work rolls in the rolling stand 300. The work rolls are usually located between the upper and lower backup roll 310a, 310b in the rolling stand. However, they are not shown in FIG. 1, since they must be designed and designed to move the trolley through the rolling stand 300. The following shows the trolley 100 according to the invention for transporting drive spindles. The trolley has a running gear 105, here, for example, running wheels for moving the trolley - if necessary together with drive spindles - from the service side BS of the rolling stand 300 through the rolling stand to the driving side AS, or vice versa. In this case, the trolley is made fundamentally so flat that it can be moved under the drive spindles 200 and, in particular, under their expanded heads 210.

In Fig. 1, the first carrier 110 as a component of the lifting carriage is raised to a height or lower than the lower drive spindle 200. In this position, the drive spindle can be stacked advantageously without using a crane on the first carrier.

Figure 2 shows in detail the structural embodiment of the claimed cart 100, with the first and second supporting device 110, 112, respectively, in the neutral position. In particular, a first carrier device 110 is visible, which can be raised and lowered relative to its neutral position by means of a first drive device 120, for example a hydraulic cylinder, and a first lifting device 116, for example a crank-lifting device. A trolley can have only one or both carriers, depending on the total lift required.

The lifting path for only one of the supporting devices due to the crank-knee lifting device 116 is limited. In order to make it possible to ascend to great heights, according to the invention, the second carrier 112 is integrated in the first carrier 110, and the second carrier, in turn, can be raised or lowered outside the first carrier using a second drive unit 114, for example the shape of the hydraulic cylinder, and a second lifting device 116, for example a second crank-knee joint device.

Preferably, the trolley has its own third drive unit 140 for independently moving the trolley. Alternatively, it can also be moved using external drive devices, such as a locomotive for changing rolls, which are connected to the trolley by means of pulling cables. The undercarriage 105 of the trolley may be in the form of running wheels or in the form of skids in order to respectively move the trolley along the rails that are laid on the floor of the rolling mill through the rolling mill.

The trolley is operated according to the invention as follows:

- feeding the trolley 100 under the drive spindle 200 of the rolling stand 300;

- lifting the first and / or second carrier devices 112, 110 of the cart under the drive spindle 200;

- reception of the drive spindle;

- corresponding to the necessity of lowering the first and / or second supporting devices with a drive spindle, for example, to a neutral position; and

- retraction of the cart with the drive spindle.

The supply of the cart under the drive spindle 200 and the removal of the cart can be carried out through the rolling stand 300 or in the transverse direction relative to the working spindles.

When the trolley moves to the drive spindles 200 through the rolling stand 300, this movement includes the following steps.

The cart with the first and, if necessary, the second load-bearing devices, respectively, in the neutral or raised position, enters the rolling stand with dismantled work rolls. The neutral or elevated position of the load-bearing devices is required so that the load-bearing device at the entrance does not collide with the floor of the metallurgical workshop (see figure 3).

The first and / or second load-bearing devices before reaching the head 210 of the drive spindle 200 inside the rolling stand 300 are lowered below the neutral position and, therefore, below the head to be able to pass under the head (see figures 4 and 5).

After the head has passed, the load-bearing devices, in accordance with the requirements — usually above the neutral position — are lifted under the drive spindle to receive the drive spindle together with its head.

Following this, the cart with the drive spindle is retracted, but the first and second supporting devices are not lowered below the neutral position so as not to collide with the floor of the metallurgical workshop.

LIST OF POSITIONS

100 Trolley

105 Running gear

110 First Carrier

112 Second carrier

114 Second drive device

116 Lifting device, such as a crank-knee joint or a “scissor” type joint

120 First Drive Unit

200 drive spindles

210 Drive spindle head

300 rolling stand

310a Upper backup roll

310b Lower backup roll

400 Drive Unit / Gear Stand Reducer

500 rails

Claims (12)

1. A trolley for transporting at least one drive spindle for the rolling mill roll, wherein the trolley is flat and has a chassis with which it can pass under the drive spindle, characterized in that it is made in the form of a lifting trolley with the first a carrier device and with a first drive unit, wherein the first drive unit serves to lift the first carrier device under the drive spindle and to lower the first carrier device, if necessary, together with the drive spindle, completely neutral position. 2. The trolley according to claim 1, characterized in that the trolley has a second carrier device that is integrated in the first carrier device and together with the first carrier device can be lowered relative to the neutral position. 3. The trolley according to claim 2, characterized in that the second carrier device is aligned with the second drive device for raising or lowering the second carrier device relative to the first carrier device. 4. A trolley according to one of the preceding paragraphs, characterized in that the first and / or second drive units (120, 114) are mechanically connected respectively by means of a lifting device to the first or second load-bearing devices (110, 112). 5. A trolley according to claim 1, characterized in that the chassis (105) is made with running wheels or runners for moving the trolley, preferably along rails (500), which are laid on the floor of the rolling mill in which the rolling mill is located. 6. The trolley according to claim 1 or 2, characterized in that it has a third drive unit (140) for independent movement of the trolley. 7. The method of operation of the trolley (100) according to one of claims 1 to 6, including feeding the trolley (100) under the drive spindle (200) of the rolling stand (300), lifting the first and / or second carrier devices (112, 110) of the trolley under drive spindle (200), receiving a drive spindle, corresponding to the need to lower the first and / or second load-bearing devices with a drive spindle and retract the cart with a drive spindle (200). 8. The method according to claim 7, characterized in that the trolley (100) is supplied under the drive spindle (200) through the rolling stand (300) from the side (BS) of its service to the drive side (AS) and that the trolley is tipped in the opposite direction direction. 9. The method according to claim 8, characterized in that the trolley (100) with the first and, if necessary, the second load-bearing devices (110, 112), respectively, in a neutral or raised position is fed into a rolling stand with dismantled work rolls, the first and, if necessary, the second carrier device (110, 112) before reaching the head (210) of the drive spindle (200) is lowered below the neutral position and, therefore, below the head, and the trolley (100) with the first and, if necessary, the second carrier device ( 110, 112) are fed under the head (210) bottom spindle, and the first and / or second supporting devices (110, 112), after passing under the head in accordance with the requirements, are lifted under the drive spindle (200) to receive the drive spindle together with its head, and at the same time after that the trolley (100 ) together with the drive spindle (200) are retracted, and the first and second supporting devices do not lower below the neutral position. 10. The method according to claim 7, characterized in that the supply of the cart (100) under the drive spindle (200) and the subsequent removal of the cart with the drive spindle is carried out respectively in the transverse direction to the longitudinal axis of the drive spindle in the mounted state. 11. The method according to claim 7, characterized in that the supply of the cart under the drive spindle through the rolling stand (300) and the subsequent removal of the cart with the drive spindle is carried out respectively in the transverse direction to the longitudinal axis of the drive spindle in the mounted state, or vice versa. 12. The method according to one of claims 7 to 11, characterized in that the first and / or second supporting devices, at least in the neutral position, and preferably also in the lowered and / or raised position, respectively, are configured to lock, respectively with a trolley.

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