Lathe special for overhauling rolling ring

Abstract

The utility model discloses a special lathe for overhauling a rolling ring. The special lathe for overhauling the rolling ring comprises a motorized sliding rail, a knife edge and grinding wheel clamp, a motor, a motorized sliding table, a sliding table base and a lathe rack, the sliding table base is arranged on the lathe rack; the motorized sliding rail is arranged on the sliding table base; the motorized sliding table is arranged on the motorized sliding rail and can slide along the motorized sliding rail; and the knife edge and grinding wheel clamp is connected with the motorized sliding table through a motor. According to the lathe special for overhauling the rolling ring and the method for overhauling the rolling ring of the steam rotary drying machine, workers can conveniently detect, turn and grind the rolling ring on line on site, the surface roughness size of the rolling ring is controlled, the maintenance quality is controllable, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the field of petrochemical dynamic equipment drying, in particular to the technical field of rotary drying equipment, and specifically refers to a special lathe for repairing the rolling ring of rotary equipment. Background Art

[0002] Steam rotary dryer is widely used in the petrochemical field. It is the core equipment in the production equipment of PTA (purified terephthalic acid), POM (polyoxymethylene), PPS (resin material), PPE (polyphenylene ether), HDPE (high-density polyethylene), etc. The steam rotary dryer consists of a front roller, a rear roller, two tugboats supporting the front roller and the rear roller respectively, and a set of gear ring transmission system. The roller is an important component of the steam rotary dryer. The steam rotary dryer adopts two-point support, which relies on a pair of supporting wheels to support the roller. The roller bears the entire weight of the dryer drum and can act as a bearing to ensure the stable rotation of the dryer drum. The front and rear rollers of the steam rotary dryer bear the entire weight of the dryer drum and all rotating parts such as the materials to be processed and condensate. Due to the long-term production operation with materials, the operation cycle of the steam rotary dryer will gradually decrease with the passage of time, and equipment failures will often occur. The main problems are wear, scratches, pits, etc. on the surface of the rollers, which will cause wear on the surfaces of the supporting wheels on both sides of the rollers. In the long run, this will cause great safety hazards to the smooth operation of the steam rotary dryer.

[0003] In the past, the roller ring was generally repaired by directly dismantling it for offline maintenance, but there were problems such as complicated procedures, cumbersome processes, increased costs, and long time. Therefore, it is necessary to provide a special lathe and method for repairing the roller ring of a steam rotary dryer with simple procedures, time saving and labor saving. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a special lathe for repairing rollers and a method for conveniently inspecting and repairing the roller rings of a steam rotary dryer, so that workers can conveniently detect, turn and grind the roller rings online on site, control the surface roughness size, make the maintenance quality controllable, and save time and labor.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a special lathe for roller ring maintenance, including a motorized slide rail, a cutting edge and a grinding wheel fixture, a motor, a motorized slide, a slide base and a lathe frame; the slide base is arranged on the lathe frame; the motorized slide rail is arranged on the slide base; the motorized slide is arranged on the motorized slide rail and can slide along the motorized slide rail; the cutting edge and the grinding wheel fixture and the motorized slide are connected through a motor.

[0006] In one embodiment, the motorized slide is adjustable in both the X-axis and the Y-axis directions.

[0007] In one embodiment, it also includes a reducer and a main motor; the reducer and the main motor are arranged at one end of the slide base and connected to the motorized slide.

[0008] The utility model also provides a method for repairing a roller ring of a steam rotary dryer, the method comprising the following steps:

[0009] (1) After removing the protective cover of the roller ring of the steam rotary dryer, place the special lathe for roller ring maintenance directly under the roller ring and level it, and then use the special lathe for roller ring maintenance to turn the outer surface of the roller ring until it is smooth;

[0010] (2) After turning is completed, the contact surface between the roller and the support roller is readjusted and aligned; check and confirm whether the meshing data between the contact surface between the roller and the support roller meets the design requirements.

[0011] In one embodiment, directly below means that the center line of the special lathe for roller ring inspection coincides with the projection of the center axis of the roller ring on the Z axis.

[0012] In one embodiment, the method further includes adjusting the span of the supporting wheel.

[0013] In one embodiment, in step (1), the method used to determine whether the outer surface of the roller ring has been turned to be smooth is to perform a PT test; if the test result is 100% PT flaw detection without cracks, directly proceed to step (2); if the test result shows that there are still small pits remaining, use an internal grinder to grind the edges of the small pits and use an angle grinder to grind them until the pit surface roughness is above Ra3.2.

[0014] In one embodiment, before the turning process, the steam rotary dryer rotates for more than 4 hours, and then the contact surface of the support wheel is adjusted to ensure that the lead is evenly pressed at each contact point between the roller ring and the support wheel for the subsequent turning process of the roller ring.

[0015] In one embodiment, a temporary oil drip lubrication method is used during the turning process.

[0016] In one embodiment, after step (2), the method further includes step (3): dismantling the motorized slide and the lathe frame, cleaning the work site, clearing the machinery, tools, and cutters, and removing iron shavings and debris to meet the basic conditions for normal operation of the equipment.

[0017] The utility model provides a method for repairing the rolling ring of a steam rotary dryer, which is convenient for the maintenance operation of the on-site staff and can also make the rolling ring receive more accurate repair treatment. The utility model adopts a customized special lathe for repairing the rolling ring. The special lathe for repairing the rolling ring is placed on the tugboat frame of the support system directly below the rolling ring of the steam rotary dryer, and the relative position of the special lathe for repairing the rolling ring on the Z axis and the rolling ring is aligned. After aligning the position, the special lathe for repairing the rolling ring is fixed by welding a connecting plate and bolts. The utility model can be carried out without stopping the steam rotary dryer during repair. The method does not require the removal of the rolling ring, and can repair the outermost working surface of the rolling ring online. The transmission mechanism of the steam rotary dryer and the special lathe for repairing the rolling ring are used to perform floating online dynamic repair on the rolling ring. The special lathe for repairing the rolling ring can be kept level with the lower edge of the rolling ring surface, and the surface of the rolling ring is evenly repaired, turned and polished to ensure that the roughness of the repaired rolling ring is Ra1.6.

[0018] The utility model is a special lathe for roller ring inspection and repair, which has the advantages of small size, light weight, simple and easy on-site installation and debugging, short working cycle and convenient and quick operation.

[0019] The method of the utility model saves the disassembly and assembly cycle of the roller ring, so that the steam rotating roller ring can be repaired in an online state, and has the advantages of low cost, saving time and cost.

[0020] The utility model is provided with a special lathe for roller ring inspection and repair, which is located just below the roller ring of the steam rotary dryer and can accurately ensure that the lathe is in a horizontal position with the lower edge of the roller ring surface by a metering method.

[0021] The utility model can conveniently clean up the waste chips produced by turning and grinding the rolling ring during maintenance, thus saving time and labor.

[0022] The method of the utility model can realize on-site online detection of turning, grinding dimensions and rolling ring surface roughness, so that the maintenance quality can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic structural diagram of a roller and a support system of an embodiment of a steam rotary dryer.

[0024] Figure 2 It is a structural schematic diagram of an embodiment of a special lathe for roller ring maintenance of the utility model.

[0025] Figure 3 The present invention is a schematic diagram of the relative positions of the special lathe for roller ring maintenance and the roller ring of the steam rotary dryer during maintenance.

[0026] Wherein, the reference numerals are:

[0027] Rolling 101

[0028] Cylinder 102

[0029] Support wheel 103

[0030] Bearing seat 104

[0031] Support roller rack 105

[0032] Motorized Slide 201

[0033] Knife edge and grinding wheel fixture 202

[0034] Motor 203

[0035] Motorized slide 204

[0036] Slide base 205

[0037] Reducer 206

[0038] Main motor 207

[0039] Lathe frame 208 DETAILED DESCRIPTION

[0040] The detailed description and technical content of the utility model are now described as follows with reference to the accompanying drawings:

[0041] In the following text, the terms "first" and "second" used for components are intended to distinguish between the components, not to limit the order of the components. In addition, the spatial relative terms such as "top", "bottom", "upward", "downward" and so on in the following text are based on the directions drawn in the drawings of this text. It can be understood that the spatial relative terms may change with the change of the directions drawn in the drawings. For example, in the drawings of this text, Figure 1 When placed horizontally, the original "top" and "bottom edge" will change to "left" and "right" respectively.

[0042] Figure 1 The structure diagram of the roller and support system of an embodiment of a steam rotary dryer is shown in FIG. In this embodiment, the steam rotary dryer includes a roller 101, a cylinder 102, a support wheel 103, a bearing seat 104, and a support wheel frame 105; the support wheel 103 and the bearing seat 104 are on the support wheel frame 105; in this embodiment, the number of support wheels 103 is 2, which are respectively arranged on both sides of the roller 101. However, it should be noted that Figure 1 Only a part of the steam rotary dryer is shown, but it is not used to limit the present invention. In other embodiments, the number of the rollers 101 can be 2 or more.

[0043] Figure 2This is a structural schematic diagram of an embodiment of a special lathe for roller ring maintenance of the utility model, which includes a motorized slide rail 201, a blade and grinding wheel fixture 202, a motor 203, a motorized slide 204, a slide base 205 and a lathe frame 208; the slide base 205 is arranged on the lathe frame 208; the motorized slide rail 201 is arranged on the slide base 205; the motorized slide 204 is arranged on the motorized slide rail 201 and can slide along the motorized slide rail 201; the blade and grinding wheel fixture 202 and the motorized slide 204 are connected through the motor 203.

[0044] The motorized slide 204 is adjustable in two directions, the X-axis and the Y-axis. The motorized slide of the special lathe for roller ring inspection of the utility model has the adjustment function in two directions, the X-axis and the Y-axis, and can realize the accurate tool setting of the roller ring.

[0045] The special lathe for roller ring inspection of the utility model further comprises a reducer 206 and a main motor 207 ; the reducer 206 and the main motor 207 are arranged at one end of the slide base 205 and connected to the motorized slide 204 .

[0046] The method for repairing the roller ring of the steam rotary dryer of the utility model comprises the following steps:

[0047] (1) After removing the protective cover of the roller ring 101 of the steam rotary dryer, place a special lathe for roller ring maintenance directly under the roller ring 101 and level it, and then use the special lathe for roller ring maintenance to turn the outer surface of the roller ring 101 until it is smooth;

[0048] (2) After turning is completed, the contact surface between the roller 101 and the supporting wheel 103 is readjusted and aligned; and the meshing data between the contact surface between the roller 101 and the supporting wheel 103 is checked to confirm whether it meets the design requirements.

[0049] Directly below means that the center line of the special lathe for roller ring maintenance coincides with the projection of the center axis of the roller ring 101 on the Z axis.

[0050] The method for repairing the roller ring of the steam rotary dryer of the utility model also includes adjusting the span of the support wheel 103 so that the center height of the main machine meets the design. The location of the special lathe for repairing the roller ring is arranged as follows: Figure 3 As shown by Figure 3 It can be seen that the approximate range of the space for placing the lathe is that the size of the special lathe for roller ring maintenance should not only be appropriately reduced, but also be convenient for clamping tools, clamping grinding heads, and manual operation. The center line of the special lathe for roller ring maintenance should coincide with the center line of the frame directly below the roller ring 101 as much as possible. While ensuring accuracy, the advantage of this position is that the operating space is large enough.

[0051] In step (1), the method used to determine whether the outer surface of the roller ring has been turned to be smooth is to perform a PT test; if the test result is 100% PT flaw detection without cracks, directly proceed to step (2); if the test result shows that there are still small pits remaining, use an internal grinder to grind the edges of the small pits and use an angle grinder to grind them smooth until the pit surface roughness is above Ra3.2.

[0052] Before the turning process, the steam rotary dryer rotates for more than 4 hours, and then adjusts the contact surface of the support wheel 103 to ensure that each contact point between the roller 101 and the support wheel 103 is evenly pressed for the subsequent turning process of the roller 101. The steam rotary dryer is rotated for more than 4 hours to ensure that the cylinder of the steam rotary dryer is evenly deformed.

[0053] During the turning process, temporary oil drip lubrication is used to ensure good lubrication and cooling of the support wheel and the turned roller surface.

[0054] After step (2), the method further includes step (3): dismantling the motorized slide 204 and the lathe frame 208, cleaning the work site, clearing the machines, tools, and cutters, and removing iron shavings and debris to meet the basic conditions for normal operation of the equipment.

[0055] The method for repairing the roller ring of the steam rotary dryer of the utility model can also be described in detail as follows:

[0056] 1) When the steam rotary dryer is stopped, first remove the protective cover of the roller 101 and other things that interfere with the construction, check the lubrication of the inlet and outlet seals of the steam rotary dryer, and use the inner diameter extension ruler to accurately measure the intermediate size data of the roller pad and the supporting roller frame 105 at the designated positions of the roller at the free end of the steam rotary dryer and the roller pad at the fixed end of the steam rotary dryer and make a record; check the meshing of the large gear and the small gear, and check the contact rate of the roller at the free end and the roller at the fixed end with the supporting roller surface close to them and record it;

[0057] 2) Remove the oil retaining angle iron frame on the edge of the frame of the steam rotary dryer support device (to make a slide rail to facilitate the parallel movement of the machine tool and the operation of the crane);

[0058] 3) Use a crane to hoist the motorized slide 204 of the special lathe for roller ring inspection and repair, and use adjustable shims to align and fix it. After confirming that the installation position is correct, partially weld the lathe frame 208 to the top plate of the tugboat frame 105 to make it safe and reliable;

[0059] 4) Align the outer cylindrical surface of the roller 101 by axial turning to ensure that the motorized slide 204 is consistent with the cylindrical surface of the roller 101 in axial direction, and the error is preferably 0.02-0.06mm;

[0060] 5) Debug the relative height between the blade and the grinding wheel fixture 202 and the roller 101, test the outer cylindrical surface of the roller 101 with a cut, and if appropriate, cut the gap between the roller 101 and the supporting wheel 103 several times to eliminate the gap. The cutting amount is about 0.3-0.5 mm on one side. The cutting amount is determined according to the actual situation of the surface defects and scratches of the roller 101 on site. During the processing of the roller 101, check the meshing of the large gear and the small gear regularly to prevent the roller 101 from undercutting the large gear and the small gear due to excessive processing, and prevent damage to the gear; adjust the position of the bearing seat 104, align the surfaces of the supporting wheels 103 on both sides of the roller 101, and then process them. The processed surface provides a good benchmark for the subsequent fine processing of the roller;

[0061] 6) After processing, check the surface of roller ring 101 and perform PT inspection on the entire surface of roller ring 101. Use the corresponding blade ruler to calibrate the straightness of the surface of roller ring 101 after processing. For the remaining small pits, the operator uses an internal grinder to grind off the sharp edges around the damaged pits by about 0.2-0.5 mm to reduce the contact of the pit edges and prevent the pits from continuing to expand;

[0062] 7) Then, the lead is pressed by turning, and the relative thickness of the lead sheet at different positions is tested with a micrometer. The lead is pressed evenly and recorded, and the meshing clearance between the roller 101 and the supporting wheel 103 is determined, and the contact area is determined; if it is not ideal, the special lathe for roller maintenance is used to continue turning and grinding until the ideal state is reached;

[0063] 8) After reaching the ideal state, conduct on-site processing quality authentication and data confirmation;

[0064] 9) After the repair task is completed, the motorized slide 204 and the lathe frame 208 are dismantled, the work site is thoroughly cleaned, the machines, tools, and cutters are cleared, and iron cuttings and debris are removed to meet the basic conditions for normal operation of the equipment;

[0065] 10) Adjust the position of the bearing seat 104, restore the size between the roller ring pad and the roller frame 105 (if the size of the long hole at the bearing seat position on the roller frame 105 is not enough, consider using the overhaul saddle to lift the cylinder and add a pad under the bearing seat 104), check the meshing of the large gear and the small gear again, and adjust and align the meshing of the contact surface between the roller ring 101 and the roller 103;

[0066] 11) Finally, reinstall the protective cover and other accessory components of the roller ring 101.

[0067] The utility model provides a method for repairing the rolling ring of a steam rotary dryer, which is convenient for the maintenance operation of the on-site staff and can also make the rolling ring receive more accurate repair treatment. The utility model adopts a customized special lathe for repairing the rolling ring. The special lathe for repairing the rolling ring is placed on the tugboat frame of the support system directly below the rolling ring of the steam rotary dryer, and the relative position of the special lathe for repairing the rolling ring on the Z axis and the rolling ring is aligned. After aligning the position, the special lathe for repairing the rolling ring is fixed by welding a connecting plate and bolts. The utility model can be carried out without stopping the steam rotary dryer during repair. The method does not require the removal of the rolling ring, and can repair the outermost working surface of the rolling ring online. The transmission mechanism of the steam rotary dryer and the special lathe for repairing the rolling ring are used to perform floating online dynamic repair on the rolling ring. The special lathe for repairing the rolling ring can be kept level with the lower edge of the rolling ring surface, and the surface of the rolling ring is evenly repaired, turned and polished to ensure that the roughness of the repaired rolling ring is Ra1.6.

[0068] The utility model is a special lathe for roller ring inspection and repair, which has the advantages of small size, light weight, simple and easy on-site installation and debugging, short working cycle and convenient and quick operation.

[0069] The method of the utility model saves the disassembly and assembly cycle of the roller ring, so that the steam rotating roller ring can be repaired in an online state, and has the advantages of low cost, saving time and cost.

[0070] The utility model is provided with a special lathe for roller ring inspection and repair, which is located just below the roller ring of the steam rotary dryer and can accurately ensure that the lathe is in a horizontal position with the lower edge of the roller ring surface by a metering method.

[0071] The utility model can conveniently clean up the waste chips produced by turning and grinding the rolling ring during maintenance, thus saving time and labor.

[0072] The method of the utility model can realize on-site online detection of turning, grinding dimensions and rolling ring surface roughness, so that the maintenance quality can be controlled.

[0073] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A special lathe for roller ring maintenance, characterized in that: include: A motorized slide rail (201), a knife edge and grinding wheel fixture (202), a motor (203), a motorized slide table (204), a slide table base (205) and a lathe frame (208); the slide table base (205) is arranged on the lathe frame (208); the motorized slide rail (201) is arranged on the slide table base (205); the motorized slide table (204) is arranged on the motorized slide rail (201) and can slide along the motorized slide rail (201); the knife edge and grinding wheel fixture (202) and the motorized slide table (204) are connected via the motor (203).

2. The special lathe for roller ring maintenance according to claim 1 is characterized in that: The motorized slide (204) is adjustable in two directions, the X-axis and the Y-axis.

3. The special lathe for roller ring maintenance according to claim 1 is characterized in that: It also includes a reducer (206) and a main motor (207); the reducer (206) and the main motor (207) are arranged at one end of the slide base (205) and connected to the motorized slide (204).

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