CN111023798A - High buttress rotary kiln installation method - Google Patents
High buttress rotary kiln installation method Download PDFInfo
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- CN111023798A CN111023798A CN201911200132.8A CN201911200132A CN111023798A CN 111023798 A CN111023798 A CN 111023798A CN 201911200132 A CN201911200132 A CN 201911200132A CN 111023798 A CN111023798 A CN 111023798A
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- temporary support
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- gear
- wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/12—Rotary-drum furnaces, i.e. horizontal or slightly inclined tiltable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/22—Rotary drums; Supports therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/26—Drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/22—Rotary drums; Supports therefor
- F27B2007/2293—Rotary drums; Supports therefor the furnace being suspended
Abstract
The invention relates to the field of installation of high-altitude large-scale barrel equipment, and discloses a high buttress rotary kiln installation method. The method comprises the following steps: installing gallery trusses between the high buttresses to form a construction operation platform; hoisting, positioning, debugging and installing the riding wheel and the gear seat device; and after the corridor truss, the riding wheel and the gear seat device are installed, the barrel is hoisted in sections, in each section which is directly connected, the gear section or the wheel belt section of the barrel is hoisted, and then the middle section and the end section of the barrel which are in place are hoisted. According to the installation method of the high buttress rotary kiln, the gear section and the wheel belt section of the barrel are hoisted firstly, and then the middle section and the end section of the barrel which are in place are hoisted, so that the difficulty of aerial adjustment and butt joint can be effectively reduced, the hoisting construction efficiency is improved, and the safety is improved.
Description
Technical Field
The invention relates to the field of installation of high-altitude large-scale barrel equipment, in particular to a high buttress rotary kiln installation method.
Background
The rotary kiln is mainly used for roasting metallurgical and chemical raw materials and mainly comprises a cylinder, a kiln liner, a wheel belt, a riding wheel, a retaining wheel, a sealing device, a transmission device, auxiliary equipment and the like, wherein the high buttress rotary kiln is usually a large rotary kiln, the equipment installation position is high, the installation weight is large, facility equipment such as a large combined truss and the like is further installed below the high buttress rotary kiln, the rotary kiln is taken as an example, the diameter of a rotary kiln body is 4.5m, the total length is 110m, the total weight of a single group is 1200t, the installation inclination is 3.5%, the central elevation of a kiln head is ▽ 38.23.23 m, the cylinder is delivered from 10 sections, the heaviest section is 63t, the rotary kiln is provided with four high buttress, the elevations at the tops of the buttress are ▽ 28.80.80 m, ▽ 27.80.80 m, ▽ 26.70m and ▽ 25.60m respectively, the kiln head 1# buttress is arranged in a main workshop, the kiln head extends into the main workshop, the 6200mm width is wide between every two buttress trusses, the combined large gallery with 2600mm height is needed, the heavy 20t, the weight of the cylinder is inevitably increased, the weight of the temporary buttress is required to be installed from the side of the support frame in a conventional secondary installation method, and the temporary rotary kiln head is inevitably, and the temporary gallery is not required to be installed, and.
The inventor indicates in a paper 'shallow analysis of large-scale high buttress rotary kiln installation technology' published in 2018 and 12 months that a corridor truss is installed firstly to form a temporary construction operation platform, construction is facilitated, an adjustable temporary support is arranged on the corridor truss to serve as a bearing supporting point for barrel hoisting and assembling, high-altitude bottling and welding are conducted, a laser theodolite method is adopted for adjusting the straightness of the barrel, installation accuracy is guaranteed, and the purpose of quickly installing the high buttress rotary kiln is achieved. The paper mainly introduces the installation of the high buttress rotary kiln on the whole, and particularly, a concrete sectional hoisting scheme of the cylinder is not described, but for high-altitude hoisting, the difficulty in safely and effectively realizing the hoisting of each section of the heavy cylinder in place is just the difficulty in the whole engineering construction.
Disclosure of Invention
The invention aims to solve the technical problem of providing a safe and efficient high buttress rotary kiln installation method.
The invention discloses a method for installing a high buttress rotary kiln, which comprises the following steps:
installing gallery trusses between the high buttresses to form a construction operation platform;
hoisting, positioning, debugging and installing the riding wheel and the gear seat device;
and after the corridor truss, the riding wheel and the gear seat device are installed, the barrel is hoisted in sections, in each section which is directly connected, the gear section or the wheel belt section of the barrel is hoisted, and then the middle section and the end section of the barrel which are in place are hoisted.
Preferably, when the gear section or the wheel belt section is hoisted, the corresponding cylinder is hoisted firstly, and then the gear or the wheel belt is hoisted and sleeved on the corresponding cylinder.
Preferably, when the barrel is hoisted, a temporary support is arranged at a position corresponding to the high buttress and the gallery truss for assisting installation, and a bracket with adjustable height is arranged on the temporary support;
when a wheel belt section of the cylinder body is hoisted, a first temporary support, a second temporary support and a third temporary support are arranged below the installation position of the wheel belt section, the first temporary support is positioned between the second temporary support and the third temporary support, and the installation position of the wheel belt is positioned between the first temporary support and the third support;
adjusting the height of each temporary support to ensure that the bracket height of the second temporary support is lower than the connecting height of the brackets of the first temporary support and the third temporary support;
the cylinder body for hoisting the belt segment of the wheel is placed on the bracket seats of the first temporary bracket and the third temporary bracket, and a gap enough for the belt to pass through is reserved between the second temporary bracket and the cylinder body of the belt segment of the wheel;
hoisting the wheel belt, sleeving the wheel belt section on the cylinder body from the side of the second temporary support in a penetrating manner, and pausing when the wheel belt penetrates and sleeves between the first temporary support and the second temporary support;
lifting the bracket of the second temporary bracket, and lowering the bracket of the first temporary bracket to enable the second temporary bracket and the third temporary bracket to support the cylinder body of the wheel belt section, wherein a gap enough for the wheel belt to pass is reserved between the first temporary bracket and the cylinder body of the wheel belt section;
and continuously adjusting the belt pulley to a belt pulley installation position, adjusting and fixing the belt pulley after the belt pulley is in place, and installing the belt pulley on the cylinder body of the belt pulley section.
Preferably, after the cylinder body of the wheel belt section is hoisted to the brackets of the first temporary support and the third temporary support, a temporary pull rod is connected between the cylinder body of the wheel belt section and the cylinder body of the wheel belt section or the high buttress for fixing, and then hoisting and sleeving of the wheel belt are carried out.
Preferably, before the cylinder of the wheel belt section is fixed through the temporary pull rod, the cylinder of the wheel belt section is adjusted to be in a horizontal state through the first temporary support and the third temporary support, and then the cylinder of the wheel belt section is fixed.
Preferably, after the belt wheel is installed, the height of the second temporary support and the height of the third temporary support are adjusted simultaneously, the whole belt wheel section slowly descends in parallel and stops after being close to the high side of the supporting wheel, then the second temporary support slowly ascends, and the third temporary support slowly descends until the belt wheel is completely placed on the supporting wheel.
Preferably, when the barrel is hoisted, temporary supports are arranged at the corresponding positions of the high buttress and the gallery truss for assisting installation;
when a belt wheel section of the cylinder body is hoisted, a fourth temporary support and a fifth temporary support are arranged at corresponding positions of the belt wheel section, and the belt wheel installation position of the belt wheel section is located between the fourth temporary support and the fifth temporary support;
the cylinder body for hoisting the wheel belt section is placed on the fourth temporary support and the fifth temporary support, then the wheel belt is hoisted, and the cylinder body for hoisting the wheel belt section is sleeved on the cylinder body for hoisting the wheel belt section from the side of the fifth temporary support;
when the wheel belt is sleeved on the fifth temporary support, the sixth temporary support is installed on the outer side of the fifth temporary support, the sixth temporary support is made to bear the force to support the cylinder of the wheel belt section, the fifth temporary support is detached, the wheel belt is sleeved on the installation position to be adjusted and fixed, and the wheel belt is installed on the cylinder of the wheel belt section.
Preferably, when hoisting the middle section, firstly hoisting one end of the middle section to suspend the other end, then adjusting the inclination angle of the middle section to be equal to that of the rotary kiln cylinder, and then connecting the suspended end of the middle section for hoisting.
Preferably, when the barrel is hoisted, a temporary support is arranged at a position corresponding to the high buttress and the gallery truss for assisting installation, and a bracket with adjustable height is arranged on the temporary support;
when the gear section of the cylinder is hoisted, a first temporary support, a second temporary support and a third temporary support are arranged below the installation position of the gear section, the first temporary support is positioned between the second temporary support and the third temporary support, and the installation position of the gear is positioned between the first temporary support and the third support;
adjusting the height of each temporary support to ensure that the bracket height of the second temporary support is lower than the connecting height of the brackets of the first temporary support and the third temporary support;
the cylinder for hoisting the gear section is placed on the brackets of the first temporary support and the third temporary support, and a gap enough for passing through the gear is reserved between the second temporary support and the cylinder of the gear section;
hoisting a gear, wherein the gear is sleeved on the cylinder of the gear section from the side of the second temporary support, and the gear is suspended when being sleeved between the first temporary support and the second temporary support;
lifting the bracket of the second temporary support, and lowering the bracket of the first temporary support to enable the second temporary support and the third temporary support to support the cylinder of the gear section, wherein a gap enough to pass through the gear is reserved between the first temporary support and the cylinder of the gear section;
and continuously adjusting the gear to the gear installation position, adjusting and fixing after the gear is in place, and installing the gear on the cylinder body of the gear section.
Preferably, when the barrel is hoisted, temporary supports are arranged at the corresponding positions of the high buttress and the gallery truss for assisting installation;
when the gear section of the cylinder is hoisted, a fourth temporary support and a fifth temporary support are arranged at corresponding positions of the gear section, and the gear installation position of the gear section is positioned between the fourth temporary support and the fifth temporary support;
the cylinder body for hoisting the gear section is placed on the fourth temporary support and the fifth temporary support, then the gear is hoisted, and the cylinder body for hoisting the gear section is sleeved on the cylinder body for hoisting the gear section from the side of the fifth temporary support;
when the gear is sleeved to the fifth temporary support, the sixth temporary support is installed on the outer side of the fifth temporary support, the sixth temporary support is made to bear the force to support the cylinder of the gear section, the fifth temporary support is detached, the gear is sleeved to the installation position in a penetrating mode, adjustment and fixation are conducted, and the gear is installed on the cylinder of the gear section.
The invention has the beneficial effects that: according to the installation method of the high buttress rotary kiln, the gear section and the wheel belt section of the barrel are hoisted firstly, and then the middle section and the end section of the barrel which are in place are hoisted, so that the difficulty of aerial adjustment and butt joint can be effectively reduced, the hoisting construction efficiency is improved, and the safety is improved.
Drawings
FIG. 1 is a schematic overall view of a high buttress rotary kiln;
FIG. 2 is a schematic view of the installation of a fourth segment of the barrel;
fig. 3 is a schematic view of the installation of the second stage cartridge.
Reference numerals: the device comprises a first barrel section 1, a second barrel section 2, a third barrel section 3, a fourth barrel section 4, a fifth barrel section 5, a sixth barrel section 6, a seventh barrel section 7, an eighth barrel section 8, a ninth barrel section 9, a tenth barrel section 10, a tenth barrel section 11, a wheel belt 12, a riding wheel 13, a gearwheel 14, a gear seat device 15, a vestibule truss 16, a first temporary support 17, a second temporary support 18, a third temporary support 19, a fourth temporary support 20, a fifth temporary support 21 and a sixth temporary support 22.
Detailed Description
The present invention is further described below.
The gallery truss is arranged between the high buttresses to form a construction operation platform;
hoisting, positioning, debugging and installing the riding wheel and the gear seat device;
the barrel is hoisted in sections after the corridor truss, the riding wheels and the gear seat device are installed, in each section which is directly connected, the gear section and the wheel belt section of the barrel are hoisted firstly, and then the middle section and the end section of the barrel which are in place are hoisted.
Riding wheel and pinion stand device are installed on high buttress usually, and its installation order with the vestibule truss does not add the restriction, that is to say can install the vestibule truss earlier, also can install earlier and carry out riding wheel and pinion stand device. For the installation of each section of the cylinder, the method does not mean that all the belt wheel sections are required to be hoisted and then the hoisting of the rest sections is carried out, but means that in each directly connected section, the belt wheel section and the gear section are hoisted firstly, and then the middle section and the end section are hoisted, for example, in a rotary kiln with a first section, a second section and a third section, the first section and the third section are gear sections or belt wheel sections, the second section is the middle section between the first section and the third section, the first section and the third section are hoisted firstly, and then the second section is hoisted; for example, in a rotary kiln having first, second, third, fourth, fifth, sixth, and seventh sections, the second, fourth, and sixth sections are gear sections or belt sections, and the remainder are intermediate sections or end sections, for the third section, the second and fourth sections are directly connected sections, and the sixth section is not directly connected to the third section, the second and fourth sections are hoisted first, and then the third section is hoisted without hoisting the sixth section first, and for the fifth section, the sixth section is directly connected to the sixth section, and then hoisting of the sixth section and the fourth section is completed first before hoisting the fifth section.
Because the weight of the belt wheel and the gear is large, when the belt wheel section and the gear section are hoisted, the belt wheel and the gear are assembled on the ground and then hoisted, and the hoisting pressure is large, therefore, as an optimal mode, when the gear section or the belt wheel section is hoisted by the cylinder body of the belt wheel and the belt wheel section, the corresponding cylinder body is hoisted firstly, and then the gear or the belt wheel is hoisted and sleeved on the corresponding cylinder body.
After the barrel is in place, it is difficult to thread the pulley belt and the gear at high altitude, and for this reason, the invention provides two preferred embodiments.
As shown in fig. 2, firstly, when the barrel is hoisted, a temporary support is arranged at a position corresponding to the high buttress and the gallery truss for assisting installation, and a bracket with adjustable height is arranged on the temporary support; the temporary support can refer to the temporary support manufacture disclosed in the shallow analysis of the large-scale high buttress rotary kiln installation technology, and can play a role in realizing lifting in addition to the supporting function.
When a wheel belt section of the cylinder body is hoisted, a first temporary support, a second temporary support and a third temporary support are arranged below the installation position of the wheel belt section, the first temporary support is positioned between the second temporary support and the third temporary support, and the installation position of the wheel belt is positioned between the first temporary support and the third support;
adjusting the height of each temporary support to ensure that the bracket height of the second temporary support is lower than the connecting height of the brackets of the first temporary support and the third temporary support;
the cylinder body for hoisting the belt segment of the wheel is placed on the bracket seats of the first temporary bracket and the third temporary bracket, and a gap enough for the belt to pass through is reserved between the second temporary bracket and the cylinder body of the belt segment of the wheel;
hoisting the wheel belt, sleeving the wheel belt section on the cylinder body from the side of the second temporary support in a penetrating manner, and pausing when the wheel belt penetrates and sleeves between the first temporary support and the second temporary support;
lifting the bracket of the second temporary bracket, and lowering the bracket of the first temporary bracket to enable the second temporary bracket and the third temporary bracket to support the cylinder body of the wheel belt section, wherein a gap enough for the wheel belt to pass is reserved between the first temporary bracket and the cylinder body of the wheel belt section;
and continuously adjusting the belt pulley to a belt pulley installation position, adjusting and fixing the belt pulley after the belt pulley is in place, installing the belt pulley on a cylinder body of a belt pulley section, and adjusting the position of the belt pulley for the second time in a hoisting mode like the first adjustment or in a chain-rewinding equipment pulling adjustment mode.
When the wheel belt is sleeved, collision and friction can be exerted between the wheel belt and the cylinder body, so that the cylinder body can be firmly fixed to prevent displacement and falling to cause safety accidents. For the wheel belt penetrating, if the cylinder body is kept horizontal, the control of penetrating is very favorable, and friction and collision are reduced, so that as an optimal mode, before the cylinder body of the wheel belt section is fixed through the temporary pull rod, the cylinder body of the wheel belt section is adjusted to be in a horizontal state through the first temporary support and the third temporary support, and then the cylinder body is fixed.
The barrel of wheel area section still is in horizontal position after the installation wheel area, just at this moment need place its steadily on the riding wheel, and for this reason, as preferred mode, after the wheel area installation is accomplished, when adjusting the height of second temporary stand and third temporary stand simultaneously, the slow parallel decline of whole wheel area section stops after leaning on the eminence side of riding wheel, then second temporary stand slowly rises, and third temporary stand slowly descends until the wheel area is placed on the riding wheel completely.
As shown in fig. 3, the invention further provides another installation mode of the belt, specifically, when the barrel is installed, a temporary support is arranged at a position corresponding to the high buttress and the gallery truss for assisting installation;
when a belt wheel section of the cylinder body is hoisted, a fourth temporary support and a fifth temporary support are arranged at corresponding positions of the belt wheel section, and the belt wheel installation position of the belt wheel section is located between the fourth temporary support and the fifth temporary support;
the cylinder body for hoisting the wheel belt section is placed on the fourth temporary support and the fifth temporary support, then the wheel belt is hoisted, and the cylinder body for hoisting the wheel belt section is sleeved on the cylinder body for hoisting the wheel belt section from the side of the fifth temporary support;
when the wheel belt is sleeved on the fifth temporary support, the sixth temporary support is installed on the outer side of the fifth temporary support, the sixth temporary support is made to bear the force to support the cylinder of the wheel belt section, the fifth temporary support is detached, the wheel belt is sleeved on the installation position to be adjusted and fixed, and the wheel belt is installed on the cylinder of the wheel belt section.
This kind of mode just need not adopt the temporary stand of liftable, and the support as long as satisfy the supporting effect can, nevertheless consider the convenience of later stage barrel angular adjustment, still preferably adopt the temporary stand of bracket liftable. This temporary support can be directly fixed mutually with the barrel, guarantees the stability of barrel wearing the sleeve wheel area in-process.
For the sleeving and installation of the gear, the two sleeving and installation modes of the belt can be adopted, and are not described herein again.
After relevant gear section and wheel belt section installation are accomplished, can carry out the hoist and mount of interlude and end section, interlude and end section need be coaxial with the barrel part of having installed, just can install accurately, and it is comparatively difficult to rely on adjusting coaxially in the air, for this reason, as preferred mode, when hoist and mount interlude, lift by crane the one end of interlude earlier, make the other end unsettled, then the inclination of adjustment interlude equals with the inclination of rotary kiln barrel, then connect the free end of interlude and lift by crane. Therefore, the middle section can be coaxial with the in-place cylinders at the two ends of the middle section after being hoisted in place, so that the difficulty of adjusting the inclination angle and the coaxiality is reduced, and the end section can be hoisted in this way.
The invention will be further explained below by taking the installation of a rotary kiln of the "shallow separation of the installation technology of the large-scale high buttress rotary kiln" as an example. As shown in FIG. 1, the diameter of the rotary kiln head body is 4.5m, the total length is 110m, and the total weight of a single group is 1200 t; the installation gradient is 3.5%, divide into ten sections altogether, wherein the second, seven, ten sections are the wheel band section, and barrel fourth section 4 is both the wheel band section and the gear section. The overall installation sequence of the device comprises the steps of supporting wheel hoisting, gear seat hoisting 15, hoisting of the fourth section 4 of the cylinder, hoisting of the second section 2 of the cylinder, hoisting of the third section 3 of the cylinder, hoisting of the first section 1 of the cylinder, hoisting of the fifth section 5 of the cylinder, hoisting of the seventh section, hoisting of the sixth section 6 of the cylinder, hoisting of the tenth section 10 of the cylinder, hoisting of the eighth section, hoisting of the ninth section 9 of the cylinder, hoisting of the eleventh section 11 of the cylinder, and installation of a kiln head and kiln tail sealing device.
The concrete hoisting steps are as follows:
1. riding wheels 13, a gear seat device 15 and a corridor truss 16. The riding wheel 13 is hoisted by adopting a 260-ton crane, and the working conditions are as follows: the tower arm with the height of 38+21 meters, the elevation angle of the main arm of 85 degrees, the radius of 14 meters, the rated lifting capacity of 75.5 tons and the maximum weight of the hoisting equipment of 21.370 tons meet the hoisting requirement. After the equipment is hoisted in place, fixing and adjusting, reporting and checking, primary grouting, fine equipment adjustment, reporting and checking and secondary grouting are carried out, and the vestibule truss 16 is required to be installed before the cylinder is hoisted.
2. And hoisting the fourth section 4 of the cylinder. The fourth section 4 of the cylinder is a large gear installation section at the transmission position of the cylinder, and is provided with a wheel belt 12 and a large gear 14, wherein the weight of the thrust wheel belt is 43 tons, the weight of the large gear 14 is about 25 tons, the weight of the cylinder equipment is 61 tons, and the length of the cylinder is 10 meters.
The first temporary support 17 and the third temporary support 19 are mounted in the positions shown in fig. 2 before hoisting. The height of the arc-shaped bottom of the support is 30.203 m, the height of the temporary support is 500mm, the heights of the first temporary support 17 and the third temporary support 19 are 1.9 m, the support of the second temporary support 18 is made to be the same as that of the first temporary support 17, and the height of the second temporary support 18 is 1.633 m. And two sides of the bracket are supported and stabilized by using 16# channel steel. Meanwhile, the central positions of the belt 12, the large gear ring and the first temporary support 17 are calibrated on the cylinder on the ground, and a fixed baffle on the kiln head side (the reverse direction of the belt 12 in a penetrating way) is welded, and the fixed baffle is welded by adopting a 16mm steel plate.
And then hoisting the cylinder body to the mounting position, slowly placing the cylinder body on the first temporary support 17 and the third temporary support 19, and centering the center of the first temporary support 17 to align the mounting center of the belt pulley 12 with the center of the riding wheel 13. Then, the levelness of the cylinder is adjusted by using four 50-ton jacks on the first temporary support 17 and the third temporary support 19 to enable the cylinder to be in a horizontal state, and then the cylinder is welded on a base by using four 16# channel steel on the side of the third temporary support 19 (the direction opposite to the threading of the belt pulley 12) to be tensioned, so that the cylinder is firmly welded, and the cylinder is prevented from being collided during belt threading to cause instability of the cylinder.
Hoisting the belt 12 to a belt penetrating position by using a 260-ton crawler crane, penetrating the belt 12 into the cylinder from the kiln head side through a slow swing rod, and stopping after the belt 12 penetrates between the first temporary support 17 and the second temporary support 18. The second temporary support 182 is lifted up by a 50 ton jack to be stressed, and then the bracket of the first temporary support 17 is lowered.
The chain block is matched with a swing rod of a crane to pull the belt 12 to the installation position of the positioning center, the belt 12 is adjusted to be close to the positioning baffle, the belt 12 is fixed on the kiln tail side after positioning (the belt 12 is welded to penetrate through a 16mm steel plate of the positioning baffle on the side of the kiln tail), after the fixing is finished, the belt is unhooked slowly to enable a supporting ring to be placed on a supporting wheel 13 stably, and then a steel rope and a chain block of the belt 12 are removed.
After the hoisting of the wheel belt 12 is completed, the 16# channel steel for fixing the cylinder is removed, and simultaneously four 50-ton jacks of the second temporary support 18 and the third temporary support 19 are adjusted, so that the whole cylinder slowly descends in parallel and slowly leans against the high side of the upper supporting wheel 13 and then stops. Confirm to keep off wheel interval adjustment, then second temporary support 18 upwards slowly jacks, and third temporary support 19 descends slowly, and the process is steady as far as possible, avoids the barrel to rock suddenly and leads to the support unstability, places completely until wheel belt 12 with on the riding wheel 13 to the inspection ensures that both sides riding wheel 13 and wheel belt 12 combine closely the back, and the first temporary support 17 of inspection confirms behind the atress, makes third temporary support 19 unload, stop operation.
After the 260-ton hoisting bull gear 14 is threaded to a gear seat position (mounting position) from the side of the kiln head, the 260-ton crane is unhooked. The bull gear 14 is adjusted to the installation angle position by utilizing the matching of the chain block and the jack and the installation support and is temporarily fixed, and the bushing can be carried out only by properly lowering the second temporary support 18 during the bushing.
The second barrel section 2 is then installed.
3. And hoisting the second section 2 of the cylinder body. The second section 2 of the cylinder is hoisted in a split hoisting mode. And hoisting by using a 260-ton crawler crane. The total weight of the equipment is as follows: the drum weight is 62 tons, and the belt 12 is 43 tons.
As shown in fig. 3, a fourth temporary support 20 and a fifth temporary support 21 are arranged at corresponding positions of the second section 2 of the cylinder, and the installation position of the belt 12 is located between the fourth temporary support 20 and the fifth temporary support 21; then hoisting the cylinder to the fourth temporary support 20 and the fifth temporary support 21, placing and centering the center lines of the pulley belt 12 and the riding wheel 13, jacking the cylinder to the proper position by using a jack at the position of a hydraulic supporting point, and unhooking the crane after fixing.
And then installing the belt 12, enabling the 260-ton crawler crane to hoist the belt 12 to the fifth temporary support 21 side to penetrate into the cylinder, installing a sixth temporary support 22 on the outer side of the fifth temporary support 21 when the belt 12 penetrates into the fifth temporary support 21, enabling the sixth temporary support 22 to support the cylinder of the belt section under stress, dismantling the fifth temporary support 21, penetrating and sleeving the belt 12 to the installation position, adjusting and fixing, and finally adjusting the second section 2 of the cylinder to be in place.
4. And hoisting the third section 3 of the cylinder body.
And the single crawler crane with 260 tons is used for hoisting, and two 20-ton chain blocks are used for adjusting the inclination angle at the side of the kiln tail. The equipment weight is 39 tons, and the total weight of the hoisting steel rope and the chain block is about 1.5 tons.
Firstly, a third section 3 of the cylinder is hoisted by a ground crane to suspend one end of the kiln head side, and 2 sets of 20-ton chain blocks at the tail side of the kiln are utilized to adjust and control the inclination angle of the cylinder to be 3.5/100 m, namely, the horizontal distance difference between the upper opening and the lower opening of the circumference is 157.5mm by using a suspension wire pendant.
And hoisting the third section 3 of the cylinder to the installation elevation, adjusting the opening aligning gap with the interfaces of the second section 2 of the cylinder and the fourth section 4 of the cylinder, adjusting the opening aligning by using a connecting device, measuring the concentricity by using infrared alignment, and controlling the inclination angle and the concentricity. After the size is adjusted, the periphery of the positioning plate is fixed, the connecting block is fixed in the circumferential direction, the connecting bolt is fastened, and the positioning plate is welded in the circumferential direction. The third section 3 of the cylinder body is firmly welded with the second section 2 of the cylinder body and the fourth section 4 of the cylinder body. And (5) loosening the hook of the crane.
5. The first section 1 of the cylinder is hoisted. And the single crawler crane with 260 tons is used for hoisting, and two 20-ton chain blocks are used for adjusting the inclination angle at the side of the kiln tail. The equipment weight is 27 tons, and the total weight of the hoisting steel rope and the chain block is about 1.5 tons.
Hoisting the first section 1 of the cylinder to the installation elevation, adjusting the opening aligning gap with the second section 2 of the cylinder, adjusting the opening aligning by using a connecting device, measuring the concentricity by using infrared centering, and controlling the inclination angle and the concentricity. After the size is adjusted, the periphery of the positioning plate is fixed, the connecting block is fixed in the circumferential direction, the connecting bolt is fastened, and the positioning plate is welded in the circumferential direction.
The first section 1 of the cylinder body is welded firmly with the second section 2 of the cylinder body. And (5) loosening the hook of the crane.
6. And hoisting the fifth section 5 of the cylinder. The plant weighs 38 tons. The cylinder is hoisted by using a 260-ton hoist, a tower arm with the length of 38+21 meters is selected, the cylinder is hoisted within the turning radius of 12-24 meters, the rated hoisting capacity is 45-87.4 tons, the hoisting requirement is met, and the fifth section 5 of the cylinder is hoisted by referring to the first section 1 of the cylinder.
7. And hoisting the seventh section 7 of the cylinder. The seventh section 7 of the cylinder is a belt wheel section, and the weight of the equipment is as follows: the weight of the cylinder body is 57 tons, the weight of the wheel belt is 12 tons, the single-piece hoisting is carried out by using a 260-ton crawler crane, the maximum hoisting amount of the single-piece hoisting is 57+3.2+2 which is 62.2 tons, and the hoisting is carried out according to the second section 2 of the cylinder body.
8. And hoisting the sixth section 6 of the cylinder. The plant weighs 38 tons. And (3) hoisting by using a 260-ton crane, selecting a tower arm with the length of 38+21 meters, hoisting within the turning radius of 12-24 meters, and hoisting by using a rated hoisting capacity of 45-87.4 tons to meet the hoisting requirement, and hoisting by referring to the third section 3 of the cylinder.
9. The tenth section 10 of the cylinder is installed. Equipment weight: the cylinder body is 62 tons, the weight of the belt wheel 12 is 40 tons, and the belt wheel is installed by single hoisting of a 260-ton crawler crane. The maximum lifting amount of the single-piece hoisting is 62+3.2+2 which is 67.2 tons, and the hoisting is carried out according to the second section 2 of the cylinder and the seventh section 7 of the cylinder.
10. And the eighth section 8 of the cylinder is installed. 36 tons of equipment, the total lifting amount is: the weight of the cylinder is 36+3.2+1.5, which is 40.7 tons, the cylinder is hoisted by a 260-ton crane, a tower arm with the length of 38+21 meters is selected, the turning radius is 12 meters, and the rated hoisting capacity is 84.7 tons, and the hoisting is carried out according to the first section 1 of the cylinder.
11. And a ninth section 9 of the cylinder is installed. 30 tons of equipment, the total lifting amount is: and (3) hoisting by using a 260-ton crane according to the weight ratio of 30+3.2+1.5 which is 34.7 tons, selecting a tower arm with the length of 38+21 meters, the turning radius of 12 meters and the rated hoisting capacity of 84.7 tons, meeting the hoisting requirement, and performing hoisting by referring to the sixth section 6 of the cylinder.
12. The eleventh section 11 of the cylinder is installed. 20 tons of equipment are hoisted by using a 260-ton crane, a tower arm with the length of 38+21 meters is selected, the turning radius of 26 meters is selected, the rated hoisting capacity is 41.4 tons, the hoisting requirement is met, and the hoisting is carried out according to the hoisting of the first section 1 of the cylinder body.
13. Kiln head and kiln tail sealing device installation
The kiln tail sealing device is installed after the adjustment and welding of the cylinder body are finished. When the kiln body is hoisted, the lower part of the kiln head and the kiln tail sealing cover can be hoisted in place in advance, so that the kiln body is prevented from being difficult to hoist after being in place. When the sealing blades are installed and adjusted, attention needs to be paid to the lapping direction and the number of lapping layers, the sealing blades need to be folded corresponding to the direction of the furnace, two blade plates need to be tightly contacted, and a gap between the two plates cannot be left when the sealing blades rotate. The kiln tail kiln head sealing cylinder body is concentric with the rotary kiln cylinder body, and the coaxiality tolerance of the kiln tail kiln head sealing cylinder body and the rotary kiln cylinder body is less than or equal to 12mm after installation and adjustment. After the shell and the cover are assembled into a whole on site, all the connecting seams divided into halves for transportation are welded.
Claims (10)
1. The method for installing the high buttress rotary kiln is characterized by comprising the following steps of:
installing gallery trusses (16) between the high buttresses to form a construction operation platform;
hoisting the riding wheel (13) and the gear seat device (15) in place and debugging and installing;
and after the corridor truss (16), the riding wheel (13) and the gear seat device (15) are installed, the barrel is hoisted in sections, in each section which is directly connected, the gear section or the wheel belt section of the barrel is hoisted, and then the middle section and the end section of the barrel which are in place are hoisted.
2. The method for installing the high buttress rotary kiln according to claim 1, wherein: when the gear section or the wheel belt section is hoisted, the corresponding cylinder body is hoisted firstly, and then the gear or the wheel belt (12) is hoisted and sleeved on the corresponding cylinder body.
3. The high buttress rotary kiln installation method of claim 2, wherein: when the barrel is hoisted, a temporary support is arranged at the corresponding position of the high buttress and the gallery truss (16) for auxiliary installation, and a bracket with adjustable height is arranged on the temporary support;
when a wheel belt section of the barrel is hoisted, a first temporary support (17), a second temporary support (18) and a third temporary support (19) are arranged below the installation position of the wheel belt section, the first temporary support (17) is positioned between the second temporary support (18) and the third temporary support (19), and the installation position of the wheel belt (12) is positioned between the first temporary support (17) and the third support;
adjusting the height of each temporary support to ensure that the bracket height of the second temporary support (18) is lower than the bracket connecting line height of the first temporary support (17) and the third temporary support (19);
the cylinder body for hoisting the belt segment of the wheel is placed on the bracket of the first temporary bracket (17) and the bracket of the third temporary bracket (19), and a gap enough to pass through the belt (12) is reserved between the second temporary bracket (18) and the cylinder body of the belt segment of the wheel;
hoisting the belt pulley (12), sleeving the belt pulley on the cylinder of the belt pulley section from the side of the second temporary support (18), and pausing when the belt pulley (12) is sleeved between the first temporary support (17) and the second temporary support (18);
raising the bracket of the second temporary bracket (18), and lowering the bracket of the first temporary bracket (17) to enable the second temporary bracket (18) and the third temporary bracket (19) to support the cylinder body of the belt wheel section, wherein a gap enough to pass through the belt wheel (12) is reserved between the first temporary bracket (17) and the cylinder body of the belt wheel section;
and continuously adjusting the belt pulley (12) to the mounting position of the belt pulley (12), adjusting and fixing after the belt pulley is in place, and mounting the belt pulley (12) on the cylinder body of the belt pulley section.
4. The high buttress rotary kiln installation method of claim 3, wherein: after the cylinder body of the wheel belt section is hoisted to the brackets of the first temporary bracket (17) and the third temporary bracket (19), a temporary pull rod is connected between the cylinder body of the wheel belt section and the cylinder body or the high buttress of the wheel belt section for fixation, and then the wheel belt (12) is hoisted and sleeved.
5. The high buttress rotary kiln installation method of claim 4, wherein: before the cylinder body of the wheel belt section is fixed through the temporary pull rod, the cylinder body of the wheel belt section is adjusted to be in a horizontal state through the first temporary support (17) and the third temporary support (19), and then the cylinder body is fixed.
6. The high buttress rotary kiln installation method of claim 5, wherein: after the wheel belt (12) is installed, the height of the second temporary support (18) and the height of the third temporary support (19) are adjusted simultaneously, the whole wheel belt section slowly descends in parallel and stops after the wheel belt section is close to the high side of the riding wheel (13), then the second temporary support (18) slowly ascends, and the third temporary support (19) slowly descends until the wheel belt (12) is completely placed on the riding wheel (13).
7. The high buttress rotary kiln installation method of claim 2, wherein: when the barrel is hoisted, temporary supports are arranged at the corresponding positions of the high buttress and the gallery truss (16) for auxiliary installation;
when a belt wheel section of the cylinder body is hoisted, a fourth temporary support (20) and a fifth temporary support (21) are arranged at corresponding positions of the belt wheel section, and the belt wheel installation position of the belt wheel section is located between the fourth temporary support (20) and the fifth temporary support (21);
the cylinder body for hoisting the wheel belt section is placed on a fourth temporary support (20) and a fifth temporary support (21), then the wheel belt (12) is hoisted, and the cylinder body for hoisting the wheel belt section is sleeved on the cylinder body for hoisting the wheel belt section from the side of the fifth temporary support (21);
when the wheel belt (12) is sleeved on the fifth temporary support (21), the sixth temporary support (22) is installed on the outer side of the fifth temporary support (21), the sixth temporary support (22) is stressed to support the cylinder of the wheel belt section, the fifth temporary support (21) is disassembled, the wheel belt (12) is sleeved on the installation position in a penetrating mode, adjustment and fixation are carried out, and the wheel belt (12) is installed on the cylinder of the wheel belt section.
8. The method for installing the high buttress rotary kiln according to claim 1, wherein: when the middle section is hoisted, one end of the middle section is hoisted firstly, the other end of the middle section is suspended in the air, then the inclination angle of the middle section is adjusted to be equal to that of the rotary kiln cylinder, and then the suspended end of the middle section is connected for hoisting.
9. The high buttress rotary kiln installation method of claim 2, wherein: when the barrel is hoisted, a temporary support is arranged at the corresponding position of the high buttress and the gallery truss (16) for auxiliary installation, and a bracket with adjustable height is arranged on the temporary support;
when the gear section of the cylinder is hoisted, a first temporary support (17), a second temporary support (18) and a third temporary support (19) are arranged below the installation position of the gear section, the first temporary support (17) is positioned between the second temporary support (18) and the third temporary support (19), and the installation position of the gear is positioned between the first temporary support (17) and the third support;
adjusting the height of each temporary support to ensure that the bracket height of the second temporary support (18) is lower than the bracket connecting line height of the first temporary support (17) and the third temporary support (19);
the cylinder body for hoisting the gear segment is placed on the brackets of the first temporary support (17) and the third temporary support (19), and a gap enough for passing through the gear is reserved between the second temporary support (18) and the cylinder body of the gear segment;
hoisting a gear, wherein the gear is sleeved on the cylinder of the gear section from the side of the second temporary support (18), and the gear is suspended when being sleeved between the first temporary support (17) and the second temporary support (18);
raising the bracket of the second temporary bracket (18), lowering the bracket of the first temporary bracket (17) to enable the second temporary bracket (18) and the third temporary bracket (19) to support the cylinder of the gear section, and reserving a gap between the first temporary bracket (17) and the cylinder of the gear section, wherein the gap is enough to pass through the gear;
and continuously adjusting the gear to the gear installation position, adjusting and fixing after the gear is in place, and installing the gear on the cylinder body of the gear section.
10. The high buttress rotary kiln installation method of claim 2, wherein: when the barrel is hoisted, temporary supports are arranged at the corresponding positions of the high buttress and the gallery truss (16) for auxiliary installation;
when the gear section of the cylinder is hoisted, a fourth temporary support (20) and a fifth temporary support (21) are arranged at corresponding positions of the gear section, and the gear section is installed between the fourth temporary support (20) and the fifth temporary support (21);
the cylinder body for hoisting the gear section is placed on the fourth temporary support (20) and the fifth temporary support, then the gear is hoisted, and the cylinder body for hoisting the gear section is sleeved on the cylinder body for hoisting the gear section from the side of the fifth temporary support (21);
when the gear is sleeved to the fifth temporary support (21), the sixth temporary support (22) is installed on the outer side of the fifth temporary support (21), the sixth temporary support (22) is stressed to support the cylinder of the gear section, the fifth temporary support (21) is detached, the gear is sleeved to the installation position in a penetrating mode, adjustment and fixation are conducted, and the gear is installed on the cylinder of the gear section.
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| CN201911200132.8A CN111023798B (en) | 2019-11-29 | 2019-11-29 | High buttress rotary kiln installation method |
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|---|---|---|---|---|
| CN103206852A (en) * | 2012-01-13 | 2013-07-17 | 苏州中材建设有限公司 | Installation method for rotary kiln for large-sized cement production line |
| CN104266482A (en) * | 2014-09-15 | 2015-01-07 | 中国十七冶集团有限公司 | Method for air abutment support of rotary kiln cylinder |
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- 2019-11-29 CN CN201911200132.8A patent/CN111023798B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206852A (en) * | 2012-01-13 | 2013-07-17 | 苏州中材建设有限公司 | Installation method for rotary kiln for large-sized cement production line |
| CN104266482A (en) * | 2014-09-15 | 2015-01-07 | 中国十七冶集团有限公司 | Method for air abutment support of rotary kiln cylinder |
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| 万长生: "4.8×72m回转窑筒体与轮带吊装技术", 《安装》 * |
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