阅读说明：本技术 一种用于船舶闭式脱硫装置的烟囱制作方法 (Chimney manufacturing method for ship closed type desulfurization device ) 是由 包健 宗小杰 曾令平 周迓若 于 2020-06-28 设计创作，主要内容包括：本发明涉及船舶制造技术领域,具体涉及一种用于船舶闭式脱硫装置的烟囱制作方法。包括如下步骤：(1)烟囱模型设计；(2)下料图设计；(3)落料前的排版；(4)落料；(5)烟囱筒体制作；(6)筒体分段：在烟囱筒体上划出分段切割位置线,将烟囱筒体切割成烟囱筒体下半段和烟囱筒体上半段；(7)筋板焊接；(8)预组装；(9)总装。其中,步骤(6)的筒体分段工序中,在烟囱筒体外壁上位于分段切割位置线的上下位置分别预先设置有一对防变形加固组件,且防变形加固组件在烟囱筒体切割后继续保留,直至步骤(9)的总装工序完成后再去除。本发明在保证烟囱制作质量的前提下,实现了烟囱与脱硫塔的安全吊装。(The invention relates to the technical field of ship manufacturing, in particular to a chimney manufacturing method for a ship closed-type desulfurization device. The method comprises the following steps: (1) designing a chimney model; (2) designing a blanking drawing; (3) typesetting before blanking; (4) blanking; (5) manufacturing a chimney barrel; (6) barrel segmentation: marking a sectional cutting position line on the chimney cylinder, and cutting the chimney cylinder into a lower half section of the chimney cylinder and an upper half section of the chimney cylinder; (7) welding the rib plates; (8) preassembling; (9) and (6) final assembly. And (4) in the barrel segmenting process in the step (6), a pair of deformation preventing reinforcing components are respectively arranged at the upper position and the lower position of the segmented cutting position line on the outer wall of the chimney barrel in advance, and the deformation preventing reinforcing components are continuously reserved after the chimney barrel is cut until the final assembly process in the step (9) is completed and then removed. The invention realizes the safe hoisting of the chimney and the desulfurizing tower on the premise of ensuring the manufacturing quality of the chimney.)

1. A chimney manufacturing method for a ship closed desulfurization device is characterized by comprising the following steps:

(1) designing a chimney model: designing a chimney surrounding the periphery of the desulfurizing tower according to the overall dimension of the desulfurizing tower, and forming a CAD three-dimensional model of the chimney; the three-dimensional model of the chimney comprises a three-dimensional model of a chimney barrel and three-dimensional models of rib plates in the chimney barrel;

(2) designing a blanking drawing: designing blanking graphs of all rib plates according to the three-dimensional models of all rib plates in the chimney barrel; unfolding the chimney barrel according to the three-dimensional model of the chimney barrel, and designing a blanking diagram of the chimney barrel;

(3) typesetting before blanking: typesetting each rib plate in two-dimensional CAD software according to the blanking drawing of each rib plate to form a rib plate blanking layout drawing;

(4) blanking: adopting a numerical control cutting machine to carry out blanking of the rib plates according to a blanking layout of the rib plates and carrying out blanking of the chimney barrel according to a blanking diagram of the chimney barrel;

(5) manufacturing a chimney barrel: after the chimney cylinder is blanked, a numerical control bending machine is adopted to bend blanking plates of the chimney cylinder into a plurality of cylinder body sheets, and then the cylinder bodies are assembled and welded into the whole chimney cylinder;

(6) barrel segmentation: marking a sectional cutting position line on the chimney cylinder, and cutting the chimney cylinder into a lower half section of the chimney cylinder and an upper half section of the chimney cylinder;

(7) rib plate welding: welding rib plates on the inner walls of the lower half section and the upper half section of the chimney barrel to respectively form a lower half section and an upper half section of the chimney;

(8) pre-assembling: positioning the lower half part of the chimney, hoisting the lower half part of the chimney into a desulfurization tower to be installed in place, hoisting the upper half part of the chimney and butt-welding the upper half part of the chimney with the lower half part of the chimney, and carrying out reinforcing welding on a rib plate at the butt-welding position;

(9) final assembly: hoisting the pre-assembled chimney and the desulfurizing tower together to a ship for final installation;

and (3) in the barrel segmenting process in the step (6), a pair of deformation preventing reinforcing components are respectively arranged on the upper position and the lower position of the segmented cutting position line on the outer wall of the chimney barrel in advance, and the deformation preventing reinforcing components are continuously reserved after the chimney barrel is cut until the final assembly process in the step (9) is completed and then removed.

2. The method for manufacturing the chimney for the closed ship desulfurization device according to claim 1, wherein in the barrel segmentation process of the step (6), the height of the lower half section of the chimney barrel is 2/3 of the total height of the chimney barrel, and the height of the upper half section of the chimney barrel is 1/3 of the total height of the chimney barrel.

3. The method for manufacturing the chimney for the ship closed-type desulfurization device according to claim 1, wherein the deformation-preventing reinforcement assembly comprises a ring-shaped flange arranged on the outer wall of the chimney barrel.

4. The method for manufacturing the chimney for the ship closed-type desulfurization device, according to claim 3, is characterized in that the annular flange is fixedly connected with the outer wall of the chimney barrel through spot welding.

5. The method for manufacturing the chimney for the ship closed-type desulfurization device, according to claim 3, is characterized in that the annular flange is fixedly connected with the outer wall of the chimney barrel through wedge-shaped iron.

6. The method for manufacturing the chimney for the ship closed-type desulfurization device according to claim 1, it is characterized in that each anti-deformation reinforcing component comprises a pair of annular flanges which are arranged in parallel at intervals, a plurality of rotating shafts which are rotationally arranged on the pair of annular flanges and are arranged at equal intervals along the circumferential direction of the annular flanges and are vertical to the end faces of the annular flanges, eccentric clamping wheels which are arranged on the rotating shafts and are positioned between the pair of annular flanges, and a linkage clamping device which is used for operating the synchronous clamping of the eccentric clamping wheels, the linkage clamping device comprises a transition shaft which is rotatably arranged on a pair of annular flanges and is positioned between two adjacent rotating shafts, each rotating shaft and the transition shaft are provided with a transmission gear, and the transmission gears of the adjacent rotating shaft and the transition shaft are meshed with each other, and a hexagonal head used for wrenching the eccentric clamping wheel is arranged at the shaft end of the rotating shaft or the transition shaft.

7. The method for manufacturing the chimney for the ship closed-type desulfurization device according to claim 6, wherein at least one transmission gear is provided with an arc locking groove coaxial with a rotation center of the transmission gear, and the transmission gear is fixed on the annular flange through a locking screw which penetrates through the arc locking groove and is in threaded connection with the annular flange.

8. The method as claimed in claim 6, wherein the pair of anti-deformation reinforcement assemblies are arranged such that a plurality of guide rods are vertically arranged on the annular flange of one of the anti-deformation reinforcement assemblies above the segmental cutting position line, and a corresponding plurality of guide holes are arranged on the annular flange of one of the anti-deformation reinforcement assemblies below the segmental cutting position line, and in the pre-assembling process of step (8), the guide rods are inserted into the guide holes when the upper half part of the chimney is in butt joint with the lower half part of the chimney, so as to form a precise butt joint.

9. The method for manufacturing the chimney for the ship closed-type desulfurization device according to claim 1, wherein the cross-sectional shape of the chimney barrel is a square with four corners having circular arcs.

Technical Field

The invention relates to the technical field of ship manufacturing, in particular to a chimney manufacturing method for a ship closed-type desulfurization device.

Background

A desulfurizing tower is arranged on a 70000 ton wood chip ship, and the desulfurizing tower is integrally arranged in a chimney (as shown in figure 4) to form a desulfurizing device.

Disclosure of Invention

In order to solve the problems, the invention provides a chimney manufacturing method for a ship closed type desulfurization device, aiming at realizing safe hoisting of a chimney and a desulfurization tower on the premise of ensuring the chimney manufacturing quality. In addition, because the upper and lower sections on the chimney cylinder are taken down from the same cylinder, compared with the conventional method for manufacturing the cylinder sections respectively, the butt joint step caused by the manufacturing error of the two cylinder sections can be eliminated. The specific technical scheme is as follows:

a chimney manufacturing method for a ship closed desulfurization device comprises the following steps:

(1) designing a chimney model: designing a chimney surrounding the periphery of the desulfurizing tower according to the overall dimension of the desulfurizing tower, and forming a CAD three-dimensional model of the chimney; the three-dimensional model of the chimney comprises a three-dimensional model of a chimney barrel and three-dimensional models of rib plates in the chimney barrel;

(2) designing a blanking drawing: designing blanking graphs of all rib plates according to the three-dimensional models of all rib plates in the chimney barrel; unfolding the chimney barrel according to the three-dimensional model of the chimney barrel, and designing a blanking diagram of the chimney barrel;

(3) typesetting before blanking: typesetting each rib plate in two-dimensional CAD software according to the blanking drawing of each rib plate to form a rib plate blanking layout drawing;

(4) blanking: adopting a numerical control cutting machine to carry out blanking of the rib plates according to a blanking layout of the rib plates and carrying out blanking of the chimney barrel according to a blanking diagram of the chimney barrel;

(5) manufacturing a chimney barrel: after the chimney cylinder is blanked, a numerical control bending machine is adopted to bend blanking plates of the chimney cylinder into a plurality of cylinder body sheets, and then the cylinder bodies are assembled and welded into the whole chimney cylinder;

(6) barrel segmentation: marking a sectional cutting position line on the chimney cylinder, and cutting the chimney cylinder into a lower half section of the chimney cylinder and an upper half section of the chimney cylinder;

(7) rib plate welding: welding rib plates on the inner walls of the lower half section and the upper half section of the chimney barrel to respectively form a lower half section and an upper half section of the chimney;

(8) pre-assembling: positioning the lower half part of the chimney, hoisting the lower half part of the chimney into a desulfurization tower to be installed in place, hoisting the upper half part of the chimney and butt-welding the upper half part of the chimney with the lower half part of the chimney, and carrying out reinforcing welding on a rib plate at the butt-welding position;

(9) final assembly: hoisting the pre-assembled chimney and the desulfurizing tower together to a ship for final installation;

and (3) in the barrel segmenting process in the step (6), a pair of deformation preventing reinforcing components are respectively arranged on the upper position and the lower position of the segmented cutting position line on the outer wall of the chimney barrel in advance, and the deformation preventing reinforcing components are continuously reserved after the chimney barrel is cut until the final assembly process in the step (9) is completed and then removed.

Among the above-mentioned technical scheme, the chimney is cut into upper and lower two parts after whole preparation, because the deformation reinforcement subassembly of preapring for an unfavorable turn of events that has remain the special design around the cutting on the chimney barrel all the time, get rid of again after the final assembly process is accomplished, the deformation of cutting and follow-up butt joint welding has been eliminated from this, the whole preparation precision of chimney has been improved, and because the chimney is cut into upper and lower two parts and is carried out the final assembly again, and the hoist and mount height when having reduced the final assembly by a wide margin, under the prerequisite of guaranteeing chimney preparation quality, the safe hoist and mount of chimney and desulfurizing tower has been realized. In addition, because the upper and lower sections on the chimney cylinder are taken down from the same cylinder, compared with the conventional method for manufacturing the cylinder sections respectively, the butt joint step caused by the manufacturing error of the two cylinder sections can be eliminated.

Preferably, in the barrel section step in the step (6), the height of the lower half section of the chimney barrel is 2/3 of the total height of the chimney barrel, and the height of the upper half section of the chimney barrel is 1/3 of the total height of the chimney barrel.

As one preferable scheme of the deformation-preventing reinforcing component in the invention, the deformation-preventing reinforcing component comprises a ring-shaped flange arranged on the outer wall of the chimney barrel.

Preferably, the annular flange is fixedly connected with the outer wall of the chimney barrel through spot welding.

Or the annular flange is fixedly connected with the outer wall of the chimney barrel through wedge-shaped iron.

As a second preferred embodiment of the deformation-preventing reinforcing components of the present invention, each of the deformation-preventing reinforcing components includes a pair of annular flanges arranged in parallel at intervals, a plurality of rotating shafts arranged on the pair of annular flanges and arranged along the circumferential direction of the annular flanges at equal intervals and perpendicular to the end faces of the annular flanges, eccentric clamping wheels arranged on the rotating shafts and between the pair of annular flanges, and a linkage clamping device for operating the synchronous clamping of the eccentric clamping wheels, the linkage clamping device comprises a transition shaft which is rotatably arranged on a pair of annular flanges and is positioned between two adjacent rotating shafts, each rotating shaft and the transition shaft are provided with a transmission gear, and the transmission gears of the adjacent rotating shaft and the transition shaft are meshed with each other, and a hexagonal head used for wrenching the eccentric clamping wheel is arranged at the shaft end of the rotating shaft or the transition shaft.

The anti-deformation reinforcing component adopts an external reinforcing mode, namely the annular flange is externally arranged on the outer wall of the chimney barrel to be reinforced. Therefore, the advantage of reducing the deformation of the chimney cylinder in the subsequent manufacturing is brought.

In order to further improve the reliability of the linkage clamping device, at least one of the transmission gears is provided with an arc locking groove which is coaxial with the rotation center of the transmission gear, and the transmission gear is fixed on the annular flange through a locking screw which passes through the arc locking groove and is in threaded connection with the annular flange.

When the chimney locking device is operated, the hexagonal head is pulled to enable the eccentric clamping wheels to be synchronously clamped and positioned on the outer wall of the chimney barrel, and then the transmission gear is locked by the locking screw.

As a further improvement of the present invention, in the pair of anti-deformation reinforcing components, a plurality of guide rods are detachably arranged on the annular flange of one anti-deformation reinforcing component above the segmental cutting position line, and a corresponding number of guide holes are arranged on the annular flange of one anti-deformation reinforcing component below the segmental cutting position line, and in the pre-assembly process of step (8), when the upper half part of the chimney is butted with the lower half part of the chimney, the guide rods are inserted into the guide holes so as to form an accurate butt joint.

In the invention, a fixed shaft is connected between a pair of annular flanges, and two ends of the fixed shaft are fixed through tensioning screws.

In the invention, the cross section of the chimney cylinder is square with four corners provided with circular arcs.

In the invention, the annular flange is provided with a plurality of lifting rings.

The invention has the beneficial effects that:

firstly, according to the chimney manufacturing method for the ship closed-type desulfurization device, the chimney is integrally manufactured and then cut into an upper part and a lower part, the specially designed anti-deformation reinforcing component is reserved on the chimney barrel body all the time before and after cutting, and the reinforcing component is removed until the final assembly process is completed, so that the deformation of cutting and subsequent butt welding is eliminated, the integral manufacturing precision of the chimney is improved, the upper part and the lower part of the chimney are cut and then subjected to final assembly, the lifting height during the final assembly is greatly reduced, and the safe lifting of the chimney and the desulfurization tower is realized on the premise of ensuring the manufacturing quality of the chimney. In addition, because the upper and lower sections on the chimney cylinder are taken down from the same cylinder, compared with the conventional method for manufacturing the cylinder sections respectively, the butt joint step caused by the manufacturing error of the two cylinder sections can be eliminated.

Secondly, according to the chimney manufacturing method for the ship closed-type desulfurization device, the linkage clamping device is arranged on the deformation prevention reinforcing assembly, and synchronous rotation of each rotating shaft and synchronous clamping of each eccentric clamping wheel are achieved through the transmission gear, so that the deformation prevention operation efficiency is improved.

Thirdly, according to the chimney manufacturing method for the ship closed-type desulfurization device, the anti-deformation reinforcing assembly is in an external reinforcing mode, namely the annular flange is externally arranged on the outer wall of the chimney cylinder body to be reinforced. Therefore, the advantage of reducing the deformation of the chimney cylinder in the subsequent manufacturing is brought.

Fourthly, according to the chimney manufacturing method for the ship closed-type desulfurization device, the transmission gear is provided with the arc locking groove, so that the reliability of the deformation-preventing reinforcing assembly is improved.

Fifth, according to the chimney manufacturing method for the ship closed-type desulfurization device, the guide rod and the guide hole are arranged on the anti-deformation reinforcing component, so that the accuracy and the efficiency of hoisting and butting the upper chimney and the lower chimney can be improved.

Drawings

FIG. 1 is a schematic structural diagram of a chimney manufacturing method for a ship closed desulfurization device, which adopts a deformation-preventing reinforcing component;

FIG. 2 is an enlarged partial view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a schematic view of the structure of the chimney.

In the figure: 1. the device comprises a desulfurizing tower, 2, a chimney, 3, a rib plate, 4, a chimney cylinder, 5, a lower section of the chimney cylinder, 6, an upper section of the chimney cylinder, 7, an anti-deformation reinforcing component, 8, an annular flange, 9, a rotating shaft, 10, an eccentric clamping wheel, 11, a linkage clamping device, 12, a transition shaft, 13, a transmission gear, 14, a hexagonal head, 15, an arc locking groove, 16, a locking screw, 17, a sectional cutting position line, 18, a guide rod, 19, a guide hole, 20, a fixed shaft, 21, a tensioning screw, 22 and a lifting ring.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

Fig. 1 to 4 show an embodiment of a method for manufacturing a chimney for a closed desulfurization device of a ship according to the present invention, which includes the following steps:

(1) designing a chimney model: designing a chimney 2 surrounding the periphery of the desulfurizing tower 1 according to the overall dimension of the desulfurizing tower 1, and forming a CAD three-dimensional model of the chimney 2; the three-dimensional model of the chimney 2 comprises a three-dimensional model of a chimney barrel 4 and three-dimensional models of rib plates 3 in the chimney barrel 4;

(2) designing a blanking drawing: designing a blanking drawing of each rib plate 3 according to the three-dimensional model of each rib plate 3 in the chimney barrel 4; unfolding the chimney barrel 4 according to the three-dimensional model of the chimney barrel 4, and designing a blanking diagram of the chimney barrel 4;

(3) typesetting before blanking: typesetting each rib plate 3 in two-dimensional CAD software according to the blanking drawing of each rib plate 3 to form a blanking layout drawing of the rib plate 3;

(4) blanking: blanking the rib plate 3 by using a numerical control cutting machine according to a rib plate blanking layout, and blanking the chimney barrel 4 according to a blanking diagram of the chimney barrel 4;

(5) manufacturing a chimney barrel: after the chimney barrel 4 is blanked, a numerical control bending machine is adopted to bend blanking plates of the chimney barrel 4 into a plurality of barrel body sheets, and then the whole chimney barrel 4 is assembled and welded;

(6) barrel segmentation: marking a sectional cutting position line 17 on the chimney barrel 4, and cutting the chimney barrel 4 into a lower chimney barrel section 5 and an upper chimney barrel section 6;

(7) rib plate welding: welding rib plates 3 on the inner walls of the lower section 5 and the upper section 6 of the chimney barrel to respectively form a lower half part and an upper half part of the chimney;

(8) pre-assembling: positioning the lower half part of the chimney, then hoisting the lower half part of the chimney into the desulfurizing tower 1 to be installed in place, hoisting the upper half part of the chimney and butt-welding the upper half part of the chimney with the lower half part of the chimney, and carrying out reinforcing welding on a rib plate at the butt-welding position;

(9) final assembly: hoisting the pre-assembled chimney 2 and the desulfurizing tower 1 to a ship together for final installation;

in the barrel segmenting process in the step (6), a pair of deformation-preventing reinforcing components 7 is arranged on the outer wall of the chimney barrel 4 in advance at the upper position and the lower position of the segmentation cutting position line 17, and the deformation-preventing reinforcing components 7 are continuously reserved after the chimney barrel 4 is cut until the final assembly process in the step (9) is completed and then removed.

Among the above-mentioned technical scheme, chimney 2 is cut into upper and lower two parts after whole preparation, because the deformation reinforcement subassembly of preapring for an unfavorable turn of events that has remain the special design around the cutting on chimney barrel 4 all the time, get rid of again after the final assembly process is accomplished, the deformation of cutting and follow-up butt joint welding has been eliminated from this, chimney 2 whole preparation precision has been improved, and because chimney 2 is cut into upper and lower two parts and is carried out the final assembly again, and the hoist and mount height when having reduced the final assembly by a wide margin, under the prerequisite of guaranteeing chimney preparation quality, the safe hoist and mount of chimney 2 and desulfurizing tower 1 has been realized. In addition, because the upper and lower two sections 5 and 6 on the chimney barrel 4 are taken down from the same barrel, compared with the conventional method for manufacturing the barrel sections respectively, the butt joint step caused by the manufacturing error of the two barrel sections can be eliminated.

Preferably, in the barrel-dividing step in the step (6), the height of the lower half 5 of the chimney barrel is 2/3 of the total height of the chimney barrel 4, and the height of the upper half 6 of the chimney barrel is 1/3 of the total height of the chimney barrel 4.

As one of the preferable solutions of the deformation-preventing reinforcing component in this embodiment, the deformation-preventing reinforcing component 7 includes a ring-shaped flange 8 disposed on the outer wall of the chimney barrel 4.

Preferably, the annular flange 8 is fixedly connected with the outer wall of the chimney barrel 4 through spot welding.

Or, the annular flange 8 is fixedly connected with the outer wall of the chimney barrel 4 through wedge-shaped iron.

As a second preferred embodiment of the deformation-preventing reinforcing component in this embodiment, each of the deformation-preventing reinforcing components 7 includes a pair of annular flanges 8 arranged in parallel at intervals, a plurality of rotating shafts 9 rotatably disposed on the pair of annular flanges 8 and arranged at equal intervals along the circumferential direction of the annular flanges 8 and perpendicular to the end surfaces of the annular flanges 8, eccentric clamping wheels 10 disposed on the rotating shafts 9 and located between the pair of annular flanges 8, and a linkage clamping device 11 for operating the eccentric clamping wheels 10 to synchronously clamp, the linkage clamping device 11 comprises a transition shaft which is rotatably arranged on a pair of annular flanges 8 and is positioned between two adjacent rotating shafts 9, a transmission gear 13 is arranged on each rotating shaft 9 and each transition shaft 12, and the transmission gears 13 of the adjacent rotating shaft 9 and the transition shaft 12 are meshed with each other, and the shaft end of the rotating shaft 9 or the transition shaft 12 is provided with a hexagonal head 14 for wrenching the eccentric clamping wheel 10.

The anti-deformation reinforcing component 7 adopts an external reinforcing mode, namely the annular flange 8 is externally arranged on the outer wall of the chimney cylinder 4 for reinforcing, compared with a conventional built-in reinforcing structure, the chimney cylinder 4 does not need to be dismounted in the subsequent manufacturing process, and is not dismounted until the mounting is finished. This provides the advantage of reducing the deformation of the chimney barrel 4 during subsequent production.

In order to further improve the reliability of the interlocking clamping device 11, at least one of the transmission gears 13 is provided with an arc locking groove 15 which is coaxial with the rotation center of the transmission gear 13, and the transmission gear 13 is fixed on the annular flange 8 through a locking screw 16 which passes through the arc locking groove 15 and is in threaded connection with the annular flange 8.

In operation, the hexagonal head 14 is firstly pulled to enable the eccentric clamping wheels 10 to be synchronously clamped and positioned on the outer wall of the chimney barrel 4, and then the driving gear 13 is locked by the locking screw 16.

As a further improvement of this embodiment, in the pair of anti-deformation reinforcing components 7, a plurality of guide rods 18 are detachably disposed on the annular flange 8 of one anti-deformation reinforcing component 7 above the segmental cutting position line 17, and a corresponding plurality of guide holes 19 are disposed on the annular flange 8 of one anti-deformation reinforcing component 7 below the segmental cutting position line 17, and in the pre-assembly process of step (8), when the upper chimney half is butted with the lower chimney half, the guide rods 18 are inserted into the guide holes 19, so as to form a precise butt joint.

In this embodiment, a fixing shaft 20 is connected between a pair of the annular flanges 8, and both ends of the fixing shaft 20 are fixed by tightening screws 21.

In this embodiment, the cross-sectional shape of the chimney barrel 4 is a square with four corners having circular arcs.

In this embodiment, the annular flange 8 is provided with a plurality of hanging rings 22.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.