Duplex low-pressure heater double-machine lifting inclined penetrating hoisting in-place and adjusting method

Abstract

The invention discloses a duplex low-pressure heater double-machine lifting inclined-penetrating hoisting in-place and adjusting method, which comprises the following steps: S1, arranging baffle blocks for preventing a sling from sliding on cylinder protection plates on two sides of the gravity center of a duplex low-pressure heater, and simultaneously taking the baffle blocks as temporary lifting lugs during equipment adjustment; s2, connecting a duplex low-pressure heater through a sling; s3, connecting a sling through hoisting equipment; s4, the inclination angle of the duplex low-pressure heater is adjusted, the head of the duplex low-pressure heater obliquely enters the position below the low-pressure cylinder foundation girder, and the tail of the duplex low-pressure heater penetrates through the turbine foundation girder; and S5, the levelness and the position of the duplex low-pressure heater are adjusted, and after adjustment is completed, the duplex low-pressure heater and the condenser neck connecting side plate are fixed. The hoisting and adjusting working efficiency of the duplex low-pressure heater can be effectively improved, inclined pulling and inclined hoisting are avoided, the hoisting safety of equipment is improved, the machine-team consumption of an outdoor crane is reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of equipment installation, and in particular to a method for lifting and obliquely hoisting a double-connected low-voltage heater into position and adjusting the double-machine lifting method. Background Art

[0002] The double low-pressure heater for the condenser of a million-kilowatt steam turbine generator set weighs more than 100 tons and is more than 20 meters long. It is delivered as an integral device and is installed under the turbine base.

[0003] In the prior art, 1. multiple cranes are used to lift and hoist the double low-pressure heater horizontally, passing it horizontally under the turbine base beam, and multiple cranes are used to hook and change hooks repeatedly to slowly lift the double low-pressure heater horizontally to the foundation; 2. A crane is used in conjunction with a towing track to horizontally tow and hoist the double low-pressure heater to the foundation; 3. The 0-meter floor and civil engineering beams on the B column side of the condenser are slowly made, and the double low-pressure heater is locked with slings on both sides of the center of gravity of the equipment, and the two hooks of a single crane are respectively connected to the slings on both sides of the center of gravity, and the equipment is hoisted into place by an inclined lifting method; 4. When adjusting the lateral level of the double low-pressure heater, a lifting belt is generally used to wrap around the equipment cylinder, and locked to the side of the equipment with a shackle, and the crane is slowly hooked to slowly rotate the equipment on the temporary support to adjust the lateral level of the equipment.

[0004] However, due to the heavy weight of the condenser double low-pressure heater and the length of the equipment far exceeding the length and width of the turbine low-pressure cylinder foundation, it cannot be directly hoisted into place by an on-site crane. In addition, the hoisting safety and efficiency of the condenser double low-pressure heater in the existing technology are low, and the hoisting process is complicated and costly. Summary of the invention

[0005] The purpose of the present invention is to provide a method for lifting and obliquely hoisting into place and adjusting a double-unit low-pressure heater by two machines, so as to solve the above-mentioned technical problems.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A method for lifting and installing a double low-voltage heater in place and adjusting the double-unit low-voltage heater by lifting and obliquely passing through the double-unit low-voltage heater comprises the following steps:

[0008] S1. Blocks are set on the cylinder guard plates on both sides of the center of gravity of the double low-pressure heater to prevent the sling from slipping. The blocks can also be used as temporary lifting ears when adjusting the equipment;

[0009] S2. Connect the double low-pressure heater through a sling and place the sling in front of the block;

[0010] S3. Connect the lifting slings through the lifting equipment, lift the double low-pressure heater, and move it horizontally to the positioning axis;

[0011] S4. Adjust the inclination angle of the double low-pressure heater, and make the head of the double low-pressure heater tilt and enter under the low-pressure cylinder foundation beam, so that the tail of the double low-pressure heater passes through the turbine foundation beam;

[0012] S5. Adjust the horizontality and position of the double low-pressure heater. After the adjustment is completed, fix the double low-pressure heater to the condenser neck side plate.

[0013] Preferably, the stopper is a tubular shaft stopper or a temporary lifting lug.

[0014] Preferably, in S2, the sling bag is hung on the cylinder on both sides of the center of gravity of the double low-pressure heater.

[0015] Preferably, in S3, two lifting devices are provided, respectively connected to the lifting slings on both sides of the center of gravity of the double low-pressure heater, and the two lifting devices are started simultaneously to lift the double low-pressure heater.

[0016] Preferably, in S3, when the two lifting devices lift the double low-pressure heater to a suitable height, the two lifting devices move simultaneously, driving the double low-pressure heater to move horizontally.

[0017] Preferably, in S4, the lifting equipment close to the head of the double low-pressure heater is hooked first, so that the head of the double low-pressure heater is tilted downward at a certain angle, and the slings connecting the two lifting equipment to the double low-pressure heater are always kept in a vertical state, and then the head of the double low-pressure heater is first passed through the foundation hole of the low-pressure cylinder of the turbine, and passed to the bottom of the low-pressure cylinder foundation beam on the head side of the double low-pressure heater.

[0018] As a further optimization, in S4, it is necessary to continuously adjust the inclination angle of the head of the double low-pressure heater. When the tail of the double low-pressure heater is at a sufficiently safe distance from the low-pressure cylinder base beam of the steam turbine on that side, the lifting equipment near the tail drops the hook to allow the tail of the double low-pressure heater to pass through the steam turbine base beam on that side.

[0019] Preferably, in S5, when adjusting the horizontality and position of the double low-pressure heater by two lifting devices, the double low-pressure heater needs to be placed on two temporary supports, and the lifting slings are removed after the adjustment is completed.

[0020] As a further preference, the horizontality of the dual low-pressure heater includes axial horizontality and lateral horizontality, and the position of the horizontality of the dual low-pressure heater includes an elevation position.

[0021] As a further preference, when adjusting the axial level and elevation of the double low-pressure heater, the double low-pressure heater is slowly lifted by a lifting device according to the measured axial level and elevation of the double low-pressure heater, and the elevation and axial level of the double low-pressure heater are adjusted by adding or subtracting the gasket under the temporary support;

[0022] When adjusting the lateral level of the double low-pressure heater, according to the measured lateral level value, the lifting equipment is connected to the temporary lifting ear on the lower side of the double low-pressure heater through the lifting sling, and grease is applied to the surface of the pier before the double low-pressure heater is put into place. Slowly lift the hook with the crane and slowly rotate the double low-pressure heater to make the lateral level of the double low-pressure heater meet the requirements.

[0023] The above technical solution has the following advantages or beneficial effects:

[0024] The adjustment method of the present invention is suitable for the hoisting and adjustment of the double low-pressure heater of the condenser of a million-kilowatt steam turbine unit. It can effectively improve the hoisting and adjustment efficiency of the double low-pressure heater, avoid crooked lifting, improve the safety of equipment hoisting, reduce the consumption of outdoor crane shifts, reduce construction costs, avoid the production of towing tracks, reduce material and personnel investment, and further reduce construction costs. The hoisting and adjustment of the hundred-ton double low-pressure heater can be completed in one day. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the method for lifting and obliquely hoisting and positioning and adjusting the double low-pressure heater by two machines in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the double low-pressure heater in the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the cooperation between the double low-pressure heater and the lifting equipment in the present invention;

[0028] Figure 4 This is a schematic diagram of the construction process using the adjustment method of the present invention. Figure 1 ;

[0029] Figure 5 This is a schematic diagram of the construction process using the adjustment method of the present invention. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the construction process using the adjustment method of the present invention. Figure 3 ;

[0031] Figure 7 This is a schematic diagram of the construction process using the adjustment method of the present invention. Figure 4 ;

[0032] Figure 8This is a schematic diagram of the construction process using the adjustment method of the present invention. Figure 5 .

[0033] In the figure: 1. Double low-voltage heater; 2. Lifting sling; 3. Block; 4. Lifting equipment; 5. Electric hoist; 6. Sling; 7. Temporary support. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Figure 1 It is a flow chart of the method for lifting and obliquely hoisting and positioning and adjusting the double low-pressure heater by two machines in the present invention; Figure 2 It is a structural schematic diagram of the double low-pressure heater in the present invention; Figure 3 This is a schematic diagram of the structure of the double low-pressure heater and the lifting equipment in the present invention, see Figures 1 to 3 As shown, a preferred embodiment is shown, which shows a method for lifting and installing a double low-pressure heater in place and adjusting the double-machine lifting, oblique penetration, and hoisting, including the following steps:

[0038] S1. Blocks 3 are set on the cylinder guard plates on both sides of the center of gravity of the double low-pressure heater 1 to prevent the sling 2 from sliding. The block 3 can also be used as a temporary lifting lug when the equipment is adjusted. In this embodiment, the block 3 is a pipe-shaft block 3 or a temporary lifting lug, which can avoid scratching the sling 2 when used as a pipe-shaft block 3. The position on the cylinder guard plate is the position where the sling 2 is tangent to the cylinder guard plate, and the block 3 is set at this position.

[0039] S2. Connect the double low-pressure heater 1 through the sling 2, and place the sling 2 in front of the block 3; placing the sling 2 in front of the block 3 can prevent the sling 2 (sling belt or wire rope) from sliding backwards during hoisting, prevent the double low-pressure heater 1 from being unstable, and prevent the double low-pressure heater 1 from falling. This protects the double low-pressure heater 1 and improves the safety of use.

[0040] S3. Connect the lifting sling 2 through the lifting equipment 4, lift the double low-pressure heater 1, and move it horizontally to the positioning axis; in this embodiment, the lifting equipment 4 includes a crane, and two lifting equipments 4 are provided. The lifting, horizontal movement and adjustment of the tilt angle of the double low-pressure heater 1 are achieved through the mutual cooperation of the two lifting equipments 4.

[0041] S4. Adjust the tilt angle of the double low-pressure heater 1, and make the head of the double low-pressure heater 1 tilt and enter under the low-pressure cylinder foundation beam, so that the tail of the double low-pressure heater 1 passes through the turbine foundation beam; through the cooperation of two lifting equipment 4, first tilt the head of the double low-pressure heater 1 downward at a certain angle, and then use the lifting equipment 4 to drive the double low-pressure heater 1 to move, so that the head of the double low-pressure heater 1 passes through the foundation hole of the steam turbine low-pressure cylinder until it is under the low-pressure cylinder foundation beam on the head side of the double low-pressure heater 1. Then continue to adjust the tilt angle of the double low-pressure heater 1 until the tail of the double low-pressure heater 1 is at a sufficient safety distance from the steam turbine low-pressure cylinder foundation beam, and then make the tail of the double low-pressure heater 1 pass through the turbine foundation beam. See Figure 5 As shown, when adjusting the tilt angle of the double low-pressure heater 1 , the electric hoist 5 and the sling 6 can be used to facilitate stable adjustment of the tilt angle of the double low-pressure heater 1 .

[0042] S5. Adjust the levelness and position of the double low-pressure heater 1. After the adjustment is completed, fix the double low-pressure heater to the condenser neck side plate. The levelness of the double low-pressure heater 1 includes the axial levelness and the lateral levelness, and the levelness position of the double low-pressure heater 1 includes the elevation position. The axial levelness, lateral levelness and elevation position of the double low-pressure heater 1 need to be adjusted.

[0043] Further, as a preferred embodiment, in S2, the sling 2 is hung on the cylinder on both sides of the center of gravity of the double low-pressure heater 1. The sling 2 can be a lifting belt or a wire rope.

[0044] Further, as a preferred embodiment, in S3, two lifting devices 4 are provided, which are respectively connected to the slings 2 on both sides of the center of gravity of the double low-pressure heater 1, and the two lifting devices 4 are started at the same time to lift the double low-pressure heater 1. Figure 3 As shown, two lifting devices 4 are distributed on both sides of the center of gravity of the double low-pressure heater 1, and the hooks of the lifting devices 4 are connected to the two slings 2. The two lifting devices 4 can work and move at the same time, and the hooks on the two lifting devices 4 can be raised and lowered alternately or at the same time, depending on the specific needs.

[0045] Further, as a preferred embodiment, in S3, when the two lifting devices 4 lift the double low-pressure heater 1 to a suitable height, the two lifting devices 4 move simultaneously, driving the double low-pressure heater 1 to move horizontally, so that the double low-pressure heater 1 can move horizontally to the positioning axis.

[0046] Furthermore, as a preferred embodiment, in S4, the lifting equipment 4 close to the head of the double low-pressure heater 1 is hooked first, so that the head of the double low-pressure heater 1 is tilted downward at a certain angle, and the slings 2 connecting the two lifting equipment 4 and the double low-pressure heater 1 always remain in a vertical state, and then the head of the double low-pressure heater 1 is first passed through the foundation hole of the low-pressure cylinder of the turbine, and passed to the bottom of the low-pressure cylinder foundation beam on the head side of the double low-pressure heater 1, so as to facilitate the double low-pressure heater 1 to maintain this tilt angle and avoid angle errors.

[0047] Furthermore, as a preferred embodiment, in S4, it is necessary to continuously adjust the inclination angle of the head of the dual low-pressure heater 1. When the tail of the dual low-pressure heater 1 is at a sufficiently safe distance from the low-pressure cylinder foundation beam of the steam turbine on that side, the lifting equipment 4 near the tail is hooked to allow the tail of the dual low-pressure heater 1 to pass through the foundation beam of the steam turbine on that side.

[0048] Further, as a preferred embodiment, in S5, when adjusting the horizontality and position of the double low-pressure heater 1 by two lifting devices 4, the double low-pressure heater 1 needs to be placed on two temporary supports, and the lifting sling 2 is removed after the adjustment is completed.

[0049] Further, as a preferred embodiment, when adjusting the axial level and elevation of the double low-pressure heater 1, the double low-pressure heater 1 is slowly lifted by the lifting equipment 4 according to the measured axial level and elevation of the double low-pressure heater 1, and the elevation and axial level of the double low-pressure heater 1 are adjusted by adding or subtracting the gasket under the temporary support;

[0050] When adjusting the horizontal level of the double low-pressure heater 1, according to the measured horizontal level value, the lifting equipment 4 is connected to the temporary lifting ear on the side of the double low-pressure heater 1 with a lower level through the lifting sling 2. Grease is applied to the surface of the pier before the double low-pressure heater 1 is in place. The temporary support is installed on the pier, and the pier is used to support the double low-pressure heater 1. The crane is slowly hooked and the double low-pressure heater 1 is slowly rotated to make the horizontal level of the double low-pressure heater 1 meet the requirements. After the angle and position adjustment of the double low-pressure heater 1 are completed, the double low-pressure heater 1 is welded and fixed to the condenser neck side plate, and then the temporary support is removed, and the grease on the surface of the pier is cleaned, and the block 3 is cut off.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for lifting and installing a double low-pressure heater in place and adjusting the double-unit low-pressure heater, characterized in that: The steps include: S1. Blocks are set on the cylinder guard plates on both sides of the center of gravity of the double low-pressure heater to prevent the sling from slipping. The blocks can also be used as temporary lifting ears when adjusting the equipment; S2. Connect the double low-pressure heater through a sling and place the sling in front of the block; S3. Connect the lifting slings through the lifting equipment, lift the double low-pressure heater, and move it horizontally to the positioning axis; S4. Adjust the inclination angle of the double low-pressure heater, and make the head of the double low-pressure heater tilt and enter under the low-pressure cylinder foundation beam, so that the tail of the double low-pressure heater passes through the turbine foundation beam; S5. Adjust the horizontality and position of the double low-pressure heater. After the adjustment is completed, fix the double low-pressure heater to the condenser neck side plate.

2. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: The stopper is a tubular shaft type stopper or a temporary lifting lug.

3. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: In S2, the sling bag is hung on the cylinder on both sides of the center of gravity of the duplex low-pressure heater.

4. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: In S3, two lifting devices are provided, which are respectively connected to the lifting slings on both sides of the center of gravity of the double low-pressure heater, and the two lifting devices are started at the same time to lift the double low-pressure heater.

5. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: In S3, when the two lifting devices lift the double low-pressure heater to a suitable height, the two lifting devices move simultaneously, driving the double low-pressure heater to move horizontally.

6. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: In S4, the lifting equipment close to the head of the double low-pressure heater is hooked first, so that the head of the double low-pressure heater is tilted downward at a certain angle, and the slings connecting the two lifting equipment to the double low-pressure heater are always kept in a vertical state. Then the head of the double low-pressure heater is passed through the foundation hole of the low-pressure cylinder of the turbine first, and then passed to the bottom of the low-pressure cylinder foundation beam on the head side of the double low-pressure heater.

7. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 6 is characterized in that: In S4, it is necessary to continuously adjust the inclination angle of the head of the double low-pressure heater. When the tail of the double low-pressure heater is at a sufficiently safe distance from the low-pressure cylinder foundation beam of the steam turbine on that side, the lifting equipment near the tail drops the hook to allow the tail of the double low-pressure heater to pass through the foundation beam of the steam turbine on that side.

8. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 1 is characterized in that: In S5, when adjusting the horizontality and position of the double low-pressure heater by two lifting devices, the double low-pressure heater needs to be placed on two temporary supports, and the lifting slings are removed after the adjustment is completed.

9. The method for lifting and installing a double low-pressure heater by two machines as claimed in claim 8 is characterized in that: The horizontality of the duplex low-pressure heater includes axial horizontality and lateral horizontality, and the position of the horizontality of the duplex low-pressure heater includes the elevation position.

10. The method for lifting and obliquely hoisting and adjusting a double low-pressure heater according to claim 9, characterized in that: When adjusting the axial level and elevation of the double low-pressure heater, slowly lift the double low-pressure heater by lifting equipment according to the measured axial level and elevation of the double low-pressure heater, and add or subtract the gasket under the temporary support to adjust the elevation and axial level of the double low-pressure heater; When adjusting the lateral level of the double low-pressure heater, according to the measured lateral level value, the lifting equipment is connected to the temporary lifting ear on the lower side of the double low-pressure heater through the lifting sling, and grease is applied to the surface of the pier before the double low-pressure heater is put into place. Slowly lift the hook with the crane and slowly rotate the double low-pressure heater to make the lateral level of the double low-pressure heater meet the requirements.

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