Installation device and installation method for steam turbine condenser

Abstract

The invention provides an installation device and an installation method of a steam turbine condenser, and the installation device comprises an underground foundation which is arranged under a frame foundation of a steam turbine and is pre-buried under the ground; the steel structure support is erected on the underground foundation and comprises a lower connecting part and an upper supporting part, the lower connecting part is connected with the underground foundation, and the upper supporting part is used for supporting the condenser; the adjustable supporting mechanism is arranged on the upper portion of the steel structure support and used for supporting and adjusting the installation position of the condenser; the penetrating type fixing assembly is used for fixing the condenser adjusted in place to the steel structure support; the installation problem of the condenser in a narrow space is solved, and accurate adjustment of the installation position of the condenser is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of steam turbine condensers, and particularly relates to an installation device and an installation method for a steam turbine condenser. Background Art

[0002] In the installation of steam turbine units, the condenser is usually placed directly below the turbine and directly connected to the turbine exhaust port via an expansion joint. The traditional installation method requires the condenser to be hoisted into place from the outside of the support foundation, so that the support elevation exceeds the foundation height, and then adjusted to the installation position by aerial translation. However, when the space between the turbine frame foundation and the condenser support foundation is too narrow, this conventional hoisting method is often difficult to implement. Especially in space-constrained engineering projects such as waste incineration power plants, condenser installation faces technical difficulties such as insufficient hoisting space, difficulty in ensuring adjustment accuracy, and complex secondary grouting procedures.

[0003] Existing technologies are unable to effectively address the challenge of precisely installing condensers within highly confined spaces, resulting in low construction efficiency and difficulty ensuring installation quality, severely impacting the overall installation progress and operational reliability of steam turbine units. Breaking through spatial limitations and achieving efficient and precise condenser installation remains a pressing technical challenge in this field. Summary of the Invention

[0004] The present invention provides an installation device and an installation method for a steam turbine condenser, which are used to solve the problems in the prior art of low construction efficiency and difficulty in ensuring installation quality due to the narrow construction space of the condenser and the steam turbine.

[0005] In a first aspect, the present invention provides a steam turbine condenser installation device, comprising: The underground foundation is set directly below the frame foundation of the steam turbine and buried below the ground; a steel structure support, erected on the underground foundation, comprising a lower connecting portion and an upper supporting portion, wherein the lower connecting portion is connected to the underground foundation, and the upper supporting portion is used to support the condenser; An adjustable support mechanism is provided on the upper portion of the steel structure support and is used to support and adjust the installation position of the condenser; The through-type fixing assembly is used to fix the condenser adjusted into place on the steel structure support.

[0006] Compared with the existing technology, the benefits of the present invention are: by arranging a steel structure support and an adjustable support mechanism between the underground foundation and the condenser, the installation problem of the condenser in a narrow space is solved; after the underground foundation construction is completed, the device first uses the steel structure support as the intermediate support structure, and realizes the precise adjustment of the installation position of the condenser through the adjustable support mechanism arranged on its upper part, and then completes the final fixation through the through-type fixing assembly; it breaks through the limitation of the traditional installation method on the working space, so that the condenser can be accurately docked with the turbine through vertical lifting and precise adjustment after it is translated into position at the ground height.

[0007] Furthermore, the steel structure support includes: A lower crossbeam is fixedly connected to the underground foundation, and an upper crossbeam is connected to the lower crossbeam through an oblique support. The upper crossbeam is provided with a mounting hole for the anchor bolts to pass through.

[0008] Furthermore, the underground foundation includes: A stepped concrete structure is arranged below the ground; the upper portion of the stepped concrete structure is a rectangular lithium iron, which is fixedly connected to the lower crossbeam.

[0009] Furthermore, the adjustable support mechanism includes: A top screw is provided on the upper supporting portion of the steel structure support; The base slide plate has a bottom surface in contact with the top of the top screw and cooperates with the top screw to support the condenser.

[0010] Furthermore, the through-type fixing assembly includes anchor bolts, and the anchor bolts pass through the upper support portion, the base slide and the condenser base.

[0011] Furthermore, it also includes: A concrete pouring layer covering the steel structure support, wherein the top surface of the concrete pouring layer is flush with the upper surface of the base slide plate.

[0012] In a second aspect, the present invention provides a method for installing a steam turbine condenser, which is performed using the steam turbine condenser installation device described in the first aspect, and comprises the following steps: S1. Construct the underground foundation directly below the frame foundation of the steam turbine and pre-embed the iron; S2. Move the condenser to the position directly below the installation location; S3. Install the installation device to securely connect the lower connection portion of the steel structure support to the underground foundation; S4. Adjusting the installation position of the condenser by using the adjustable support mechanism; S5. Use the through-type fixing assembly to fix the condenser on the steel structure support; S6. Pour concrete to form the ground foundation covering the steel structure support.

[0013] Furthermore, step S4 includes adjusting the height and levelness of the base slide by adjusting the top screw in the adjustable support mechanism so that the interface of the condenser and the expansion joint of the turbine are accurately aligned.

[0014] Furthermore, step S6 includes supporting a formwork around the steel structure support and pouring concrete until it is flush with the upper surface of the base slide to form an above-ground foundation.

[0015] Furthermore, the method also includes tightening the anchor bolts after the concrete reaches the designed strength; and completing the connection and installation of the condenser and the turbine expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of an underground foundation in one embodiment of the present invention; Figure 2 Schematic diagram of the steam turbine in position according to one embodiment of the present invention; Figure 3 This is a longitudinal schematic diagram of the condenser in place in one embodiment of the present invention; Figure 4 This is a horizontal schematic diagram of the condenser in place in one embodiment of the present invention; Figure 5 It is a front view of a steel structure support in one embodiment of the present invention; Figure 6 A side view of a steel structure support in one embodiment of the present invention; Figure 7 A top view of a steel structure support in one embodiment of the present invention; Figure 8 A longitudinal schematic diagram of a bracket in place in one embodiment of the present invention; Figure 9 A horizontal schematic diagram of a bracket in position in one embodiment of the present invention; Figure 10 Schematic diagram of the ground foundation in one embodiment of the present invention.

[0017] Description of reference numerals: 1. Steam turbine; 3. Expansion joint; 4. Frame foundation; 5. Underground foundation; 51. Lithium iron; 7. Condenser; 8. Hand hoist; 9. Steel structure support: 91. Lower beam; 92. Base slide; 93. Anchor bolt; 94. Jackscrew; 95. Nut; 96. Upper beam; 10. Concrete pouring layer. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are 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 making creative efforts shall fall within the scope of protection of the present invention.

[0019] See also Figures 1-10 In a first aspect, the present invention provides a mounting device for a condenser 7 of a steam turbine 1, comprising: An underground foundation 5 is provided directly below the frame foundation 4 of the steam turbine 1 and is pre-buried below the ground; A steel structure support 9 is erected on the underground foundation 5 and includes a lower connecting portion and an upper supporting portion, wherein the lower connecting portion is connected to the underground foundation 5 and the upper supporting portion is used to support the condenser 7; An adjustable support mechanism is provided on the upper portion of the steel structure support 9 and is used to support and adjust the installation position of the condenser 7; The through-type fixing assembly is used to fix the condenser 7 adjusted into position on the steel structure support 9.

[0020] The installation device for the condenser 7 of the steam turbine 1 provided by the present invention solves the installation problem of the condenser 7 in a narrow space by arranging a steel structure bracket 9 and an adjustable supporting mechanism between the underground foundation 5 and the condenser 7; the device first uses the steel structure bracket 9 as an intermediate supporting structure after the construction of the underground foundation 5 is completed, and realizes the precise adjustment of the installation position of the condenser 7 through the adjustable supporting mechanism arranged on the upper part thereof, and then completes the final fixation through the through-type fixing assembly; it breaks through the limitation of the traditional installation method on the working space, so that the condenser 7 can be accurately docked with the steam turbine 1 through vertical lifting and precise adjustment after it is translated into position at the ground height.

[0021] At the same time, the steel structure support 9 not only serves as a temporary supporting structure, but can also form a composite structure with the concrete foundation in subsequent construction, which not only ensures the adjustment accuracy and structural stability during the installation process, but also gives full play to the material advantages of the steel structure and concrete, significantly improving construction efficiency and quality, and reducing technical difficulty and operation risks.

[0022] Furthermore, the steel structure support 9 includes: a lower beam 91 fixedly connected to the underground foundation 5, an upper beam 96 connected to the lower beam 91 through an oblique support, and the upper beam 96 is provided with a mounting hole for the anchor bolt 93 to pass through.

[0023] The underground foundation 5 includes: a stepped concrete structure arranged below the ground; the upper portion of the stepped concrete structure is a rectangular lithium iron 51 , and the lithium iron 51 is fixedly connected to the lower crossbeam 91 .

[0024] Lithium iron 51 can meet the displacement and sliding requirements of the condenser as a foundation under the bottom plate of a horizontal equipment with increased temperature difference during thermal expansion.

[0025] The adjustable support mechanism includes: a top screw 94, which is arranged on the upper support portion of the steel structure bracket 9; a base slide 92, the bottom surface of which contacts the top of the top screw 94 and cooperates with the top screw 94 to support the condenser 7.

[0026] The through-type fixing assembly includes an anchor bolt 93 , and the anchor bolt 93 passes through the upper support portion, the base slide 92 and the base of the condenser 7 .

[0027] It also includes: a concrete pouring layer 10 covering the steel structure support 9, and the top surface of the concrete pouring layer 10 is flush with the upper surface of the base slide plate 92.

[0028] In a second aspect, the present invention further provides a method for installing the condenser 7 of the steam turbine 1, which is performed using the installation device for the condenser 7 of the steam turbine 1 described in the first aspect, and comprises the following steps: S1. Construct an underground foundation 5 directly below the frame foundation 4 of the steam turbine 1 and pre-embed iron; S2. Move the condenser 7 to just below the installation position; S3, installing the installation device to fix the lower connecting portion of the steel structure support 9 to the underground foundation 5; S4. Adjusting the installation position of the condenser 7 by the adjustable support mechanism; S5. Use the through-type fixing assembly to fix the condenser 7 on the steel structure support 9; S6. Concrete is poured to form an above-ground foundation covering the steel structure support 9.

[0029] Furthermore, step S4 includes adjusting the height and levelness of the base slide 92 by adjusting the top screw 94 in the adjustable support mechanism so that the interface of the condenser 7 and the expansion joint 3 of the steam turbine 1 are accurately aligned.

[0030] Step S6 includes supporting a formwork around the steel structure support 9 and pouring concrete until it is flush with the upper surface of the base slide 92 to form an above-ground foundation.

[0031] The process also includes tightening the anchor bolts 93 after the concrete reaches the designed strength, and completing the connection and installation between the condenser 7 and the expansion joint 3 of the steam turbine 1 .

[0032] Specifically, the method includes the following steps: S1. Since the working space at the exhaust port of steam turbine 1 is narrow, first hoist the steam turbine 1 and expansion joint 3 as a whole and position them on the frame foundation 4.

[0033] S2. Excavate the ground and construct two underground foundations 5 corresponding to the positions of the two steel structure supports 9 of the condenser 7. A rectangular buried iron is set on the upper part of the underground foundation 5, and the upper surface elevation is ±0.

[0034] S3. Backfill and compact the two underground foundations 5 and their surroundings, including the horizontal moving route of the condenser 7, and level and compact it. The elevation should be controlled at ±0.

[0035] S4. Move the condenser 7 to the ground just below the installation location, and suspend it from the lower part of the frame foundation 4 using four hand hoists 8 to lift the condenser 7 to the installation location.

[0036] S5. Make two steel structure brackets 9. Each bracket is made of H-shaped steel welded together, including a frame structure with a diagonal support in the middle; its lower crossbeam 91 is used to connect to the underground foundation 5; four holes need to be machined at the four corners of the upper and lower wing plates of the upper crossbeam 96 for installing anchor bolts 93; six holes need to be machined in the middle of the upper and lower wing plates, and then six nuts 95 are welded to the lower surface of the upper wing plate in line with these six holes, and then six bolts are used as top screws 94 to screw in the nuts 95 from bottom to top.

[0037] S6. Make the base slide plate 92 and also process four holes corresponding to the four anchor bolt 93 holes of the upper crossbeam 96.

[0038] S7. After adjusting the elevation, centerline and levelness of the condenser 7 using four hand hoists 8, install the two steel structure supports 9 on the rectangular buried iron of the two underground foundations 5. After they are completely aligned, weld the lower crossbeam 91 to the buried iron and fix them.

[0039] S8. Place the base slide 92 on the six top screws 94 of the upper crossbeam 96 of the steel structure support 9, and level and align the six top screws 94 so that their four holes are aligned with the four holes at the four corners of the upper and lower wing plates of the upper crossbeam 96.

[0040] S9. Install four anchor bolts 93, threading them through the upper and lower wings of upper crossbeam 96 and base slide 92, then through the four anchor holes in the base of condenser 7. After confirming that condenser 7 and base slide 92 are fully aligned and in place, weld anchor bolts 93 to the upper and lower wings of upper crossbeam 96 and base slide 92. Simultaneously, weld the heads of six jackscrews 94 to base slide 92 and securely weld the six jackscrews 94 to nuts 95. Remove the four hand hoists 8, leaving condenser 7 fully supported by the steel structure support 9 and slide.

[0041] S10, the flange of condenser 7 and expansion joint 3 are bolted together, and then the pipe of condenser 7 can be carried out before the concrete is poured on the ground foundation. Finally, the entire steel structure support 9 and base slide 92 are supported by formwork and concrete poured. The concrete height is flush with the upper surface of the base slide 92 to form the ground foundation of condenser 7.

[0042] S11. After the ground foundation reaches the curing strength, tighten the anchor bolts 93 of the condenser 7 to complete all work.

[0043] The subsurface foundation of the condenser 7 foundation area is first completed, followed by backfilling and compaction. The above-ground working surface is then reserved. After condenser 7 is horizontally moved to its proper position at ground level and vertically hoisted to the designed height, steel supports 9 with auxiliary adjustment devices for condenser 7 are fabricated and installed at two support locations. These supports are then connected and secured to the completed foundation. After condenser 7 is aligned and connected to turbine 1, the two steel supports 9 are formworked and grouting is performed to form a complete concrete foundation.

[0044] The method and device have simple structures. First, they are an integrated construction technology for civil engineering and installation to address the problem of condenser 7 being installed in a space with completely restricted height. The steel structure bracket 9 is manufactured in situ at the installation site and has the function of assisting in adjusting and supporting the condenser 7. The pipe connection of the condenser 7 can be carried out before the concrete is poured on the ground foundation, which improves the installation efficiency of the condenser 7 and the pipeline. The steel structure bracket 9 improves the alignment accuracy of the foundation slide and inserts the anchor bolts 93 in situ, further reducing the installation height of the condenser 7. After the equipment is aligned, the steel structure bracket 9 is supported and concrete is poured in one go, eliminating the need for equipment adjustment pads and secondary grouting. The steel-concrete composite structure foundation design in this method simultaneously leverages the advantages of both steel structure and concrete foundation, combining the good fatigue resistance and strong corrosion resistance of concrete with the high rigidity and high compressive strength of steel structure. The device is easy to obtain materials, simple to manufacture, and low in cost, which improves the construction efficiency of this type of condenser 7, significantly shortens the operation time, and reduces the difficulty of construction technology.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A steam turbine condenser installation device, characterized in that: include: The underground foundation is set directly below the frame foundation of the steam turbine and buried below the ground; a steel structure support, erected on the underground foundation, comprising a lower connecting portion and an upper supporting portion, wherein the lower connecting portion is connected to the underground foundation, and the upper supporting portion is used to support the condenser; An adjustable support mechanism is provided on the upper portion of the steel structure support and is used to support and adjust the installation position of the condenser; The through-type fixing assembly is used to fix the condenser adjusted into place on the steel structure support.

2. The installation device for a steam turbine condenser according to claim 1, characterized in that: The steel structure support comprises: A lower crossbeam is fixedly connected to the underground foundation, and an upper crossbeam is connected to the lower crossbeam through an oblique support. The upper crossbeam is provided with a mounting hole for the anchor bolts to pass through.

3. The installation device for a steam turbine condenser according to claim 2, characterized in that: The underground foundation includes: A stepped concrete structure is arranged below the ground; the upper portion of the stepped concrete structure is a rectangular lithium iron, which is fixedly connected to the lower crossbeam.

4. The installation device for a steam turbine condenser according to claim 3, characterized in that: The adjustable support mechanism comprises: A top screw is provided on the upper supporting portion of the steel structure support; The base slide plate has a bottom surface in contact with the top of the top screw and cooperates with the top screw to support the condenser.

5. The installation device for a steam turbine condenser according to claim 4, characterized in that: The through-type fixing assembly includes an anchor bolt, which passes through the upper support portion, the base slide and the condenser base.

6. The installation device for a steam turbine condenser according to any one of claim 5, characterized in that: Also includes: A concrete pouring layer covering the steel structure support, wherein the top surface of the concrete pouring layer is flush with the upper surface of the base slide plate.

7. A method for installing a steam turbine condenser, characterized in that: The installation method of the steam turbine condenser according to any one of claims 1 to 6 is carried out, comprising the following steps: S1. Construct the underground foundation directly below the frame foundation of the steam turbine and pre-embed the iron; S2. Move the condenser to the position directly below the installation location; S3. Install the installation device to securely connect the lower connection portion of the steel structure support to the underground foundation; S4. Adjusting the installation position of the condenser by using the adjustable support mechanism; S5. Use the through-type fixing assembly to fix the condenser on the steel structure support; S6. Pour concrete to form the ground foundation covering the steel structure support.

8. The method for installing a steam turbine condenser according to claim 7, wherein: Step S4 includes adjusting the height and levelness of the base slide by adjusting the top screw in the adjustable support mechanism so that the interface of the condenser is accurately aligned with the expansion joint of the steam turbine.

9. The method for installing a steam turbine condenser according to claim 7, wherein: Step S6 includes supporting a formwork around the steel structure support and pouring concrete until it is flush with the upper surface of the base slide to form an above-ground foundation.

10. The method for installing a steam turbine condenser according to claim 7, wherein: It also includes tightening the anchor bolts after the concrete reaches the design strength; and completing the connection and installation of the condenser and turbine expansion joints.

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