A turbine base ring tensioning screw lifting device

Abstract

This utility model relates to the field of pumped storage power station seat ring volute installation technology, and discloses a turbine seat ring tensioning screw lifting device, including a base, a support plate, a turntable bearing, a lifting mechanism, a bracket, positioning bolts, and positioning blocks. The support plate is used to support the tensioning screw to be installed. The support plate is rotatably fixed on the top of the base through the turntable bearing. The lifting mechanism is located at the bottom of the base. Several brackets are circumferentially arrayed on the top of the support plate. Positioning bolts are horizontally installed on the brackets by threads. Each positioning bolt is set towards the center of the support plate. A positioning block is fixedly installed at the end of the positioning bolt facing the center of the support plate. During construction, each positioning block clamps the lower end of the tensioning screw. This utility model saves time and effort in lifting the tensioning screw, has high lifting efficiency, avoids safety accidents such as tilting or slipping of the tensioning screw during the lifting process, and avoids the problem of difficulty in rotating the tensioning screw. The construction process is time-saving, labor-saving, and highly efficient.

Description

Technical Field

[0001] This utility model belongs to the technical field of pumped storage power station seat ring volute installation, specifically, it relates to a turbine seat ring tensioning screw lifting device. Background Technology

[0002] The seat ring is a crucial foundational and load-bearing component in the pumped storage power station's turbine generator unit. It is fixedly installed on the unit's foundation concrete and is the most fundamental load-bearing component of the entire unit. During installation, the pre-embedded screw sleeve must first be installed and the foundation concrete poured. Then, the entire tensioning screw is hoisted and inserted into the pre-embedded sleeve. After the seat ring is installed and adjusted, the tensioning screw inside the pre-embedded sleeve is lifted from bottom to top to the corresponding screw hole on the seat ring and screwed in, thus completing the pre-tightening installation of the tensioning screw.

[0003] Currently, the installation of tension bolts typically involves manual lifting and gradually placing supporting sleepers at the bottom of the bolt. However, because tension bolts can have diameters exceeding 100 mm and lengths exceeding 2 meters, their weight is significant, and the friction between the lower end of the bolt and the supporting sleepers is also substantial. This makes it easy for uneven force to occur during the lifting process, leading to accidents such as tilting or slipping, posing a significant safety hazard. Furthermore, once the bolt is in place, it is difficult to rotate, resulting in a labor-intensive, time-consuming, and slow installation process that impacts the overall construction progress. Utility Model Content

[0004] To solve or partially solve the problems existing in related technologies, this utility model provides a turbine seat ring tensioning screw lifting device, which can avoid safety accidents such as tilting and slipping of the tensioning screw during the lifting process, avoid the problem of the tensioning screw being difficult to rotate, and save time and effort in the construction process, with high construction efficiency.

[0005] This application provides a turbine base ring tension screw lifting device, including a base, a support plate, a turntable bearing, a lifting mechanism, a bracket, positioning bolts, and positioning blocks. The base and the support plate are flat plate structures. The support plate is used to support the tension screw to be installed. The support plate is rotatably fixed on the top of the base through the turntable bearing. The lifting mechanism is located at the bottom of the base. Several brackets are installed in a circumferential array on the top of the tray. Positioning bolts are installed horizontally on the brackets by threads. Each positioning bolt is set towards the center of the tray. A positioning block is fixedly installed at the end of the positioning bolt facing the center of the tray. During construction, each positioning block clamps the lower end of the tensioning screw.

[0006] In one alternative, the bracket includes a support plate, a reinforcing plate, and a sleeve. The support plate is fixedly installed on the top of the support plate, the reinforcing plate is fixedly installed between the support plate and the support plate, and the sleeve is horizontally fixedly installed on the support plate. The sleeve is positioned pointing towards the center of the support plate, and the sleeve is hollow inside and has internal threads. The positioning bolts are installed on the sleeve through the threads.

[0007] In one alternative, the top center of the pallet has a placement groove with a diameter larger than that of the tensioning screw.

[0008] In one alternative, at least three lifting mechanisms are arranged in a circumferential array at the bottom of the base, and positioning slots are provided at the bottom of the base corresponding to the lifting mechanisms.

[0009] In one alternative, both the base and the support plate are circular flat structures.

[0010] The beneficial effects of this utility model are: This invention utilizes a lifting mechanism to elevate the tensioning screw, saving time and effort while increasing lifting efficiency. By incorporating a bracket, positioning bolts, and positioning blocks to radially position the lower end of the tensioning screw, it prevents tilting or slippage during lifting, effectively reducing safety hazards. Furthermore, by installing a turntable bearing between the support plate and the base, the tensioning screw on the support plate rotates synchronously with the support plate during installation, avoiding the problem of difficulty in rotating the tensioning screw. This design saves time and effort during construction and increases efficiency.

[0011] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic front sectional view of the lifting device in one embodiment of this application; Figure 2 This is a top view of the lifting device in one embodiment of this application.

[0014] The following are the reference numerals in the figure: 1-base, 11-positioning groove, 2-support plate, 21-placement groove, 3-turntable bearing, 4-lifting mechanism, 5-bracket, 51-support plate, 52-reinforcing plate, 53-sleeve, 6-positioning bolt, 7-positioning stop, 8-tensioning screw. Detailed Implementation

[0015] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0020] To address the aforementioned problems, this application proposes improvements and innovations, including the following embodiments.

[0021] In one implementation, please refer to Figure 1 , Figure 2 This application provides a turbine base ring tensioning screw lifting device, including a base 1, a support plate 2, a turntable bearing 3, a lifting mechanism 4, a bracket 5, a positioning bolt 6, and a positioning stop 7. The base 1 and support plate 2 are flat plate structures. The support plate 2 supports the tensioning screw 8 to be installed. The support plate 2 is rotatably fixed to the top of the base 1 via the turntable bearing 3. The lifting mechanism 4 is located at the bottom of the base 1. Specifically, the outer ring of the turntable bearing 3 is fixedly connected to the top of the base 1, and the inner ring of the turntable bearing 3 is fixedly connected to the bottom of the support plate 2, so that the support plate 2 can freely rotate relative to the base 1 about the axis of the turntable bearing 3. Specifically, the lifting mechanism 4 is a pneumatic cylinder or a hydraulic cylinder.

[0022] Four brackets 5 are installed in a circumferential array on the top of the tray 2. Each bracket 5 is horizontally installed with a positioning bolt 6 by thread. Each positioning bolt 6 is set towards the center of the tray 2. A positioning block 7 is fixedly installed at the end of the positioning bolt 6 facing the center of the tray 2. During construction, each positioning block 7 clamps the lower end of the tensioning screw 8.

[0023] Thus, when it is necessary to lift and install the tensioning screw 8, the support plate 2 carries the tensioning screw 8 to be installed, and the lifting mechanism 4 can then lift the tensioning screw 8 to facilitate subsequent screwing-in installation. This lifting operation saves time and effort and is highly efficient. By setting multiple sets of brackets 5, positioning bolts 6, and positioning blocks 7 on the top of the support plate 2, the horizontal position of the positioning blocks 7 can be adjusted using the positioning bolts 6. This allows the positioning blocks 7 to grip the lower end of the tensioning screw 8 according to its diameter, thereby creating a radial positioning effect and preventing the tensioning screw 8 from being damaged during the lifting process. This device effectively reduces safety hazards such as tilting and slippage. By installing a turntable bearing 3 between the support plate 2 and the base 1, the support plate 2 can rotate freely relative to the base 1 about the axis of the turntable bearing 3. This facilitates the synchronous rotation of the tensioning screw 8 on the support plate 2 when it is screwed in, avoiding the problem of the tensioning screw 8 being difficult to rotate. Using this lifting device to assist in the lifting and installation of the tensioning screw 8 saves time and effort, has high installation efficiency, ensures the installation quality of the tensioning screw 8 and the seat ring, and allows for fast construction without affecting the overall construction progress.

[0024] In some embodiments, the bracket 5 includes a support plate 51, a reinforcing plate 52, and a sleeve 53. The support plate 51 is fixedly installed on the top of the support plate 2, the reinforcing plate 52 is fixedly installed between the support plate 51 and the support plate 2, and the sleeve 53 is horizontally fixedly installed on the support plate 51, pointing towards the center of the support plate 2. The sleeve 53 is hollow inside and has internal threads, and the positioning bolt 6 is threaded onto the sleeve 53. In this way, by installing the positioning bolt 6 through the sleeve 53, the installation stability of the positioning bolt 6 on the bracket 5 can be effectively improved. At the same time, the sleeve 53 can guide the horizontal position adjustment of the positioning bolt 6, thereby effectively improving the clamping reliability of the positioning bolt 6 and the positioning stop 7 on the lower end of the tensioning screw 8, ensuring that the tensioning screw 8 will not tilt or slip on the support plate 2 during the lifting process.

[0025] In some embodiments, a placement groove 21 is formed at the center of the top of the pallet 2, and the diameter of the placement groove 21 is larger than the diameter of the tensioning screw 8. In this way, when the lower end of the tensioning screw 8 is placed on the top of the pallet 2 of this lifting device before lifting the tensioning screw 8, the placement groove 21 can provide a preliminary positioning effect on the tensioning screw 8, and the side wall of the placement groove 21 can form a preliminary radial positioning effect on the tensioning screw 8, thereby avoiding safety accidents such as tilting or slipping of the tensioning screw 8 on the pallet 2 when it is initially placed on the lifting device.

[0026] It should be noted that, regarding the use of this lifting device, firstly, only one or a few of these lifting devices can be used. First, the tensioning screw 8 is hoisted and inserted into the pre-embedded sleeve. Then, when it is necessary to lift and install the tensioning screw 8, the tensioning screw 8 is manually lifted and placed on the top of the support plate 2 of this lifting device before proceeding with the subsequent lifting and screwing-in installation work. Secondly, one of these lifting devices can be placed under each pre-embedded sleeve. When the tensioning screw 8 is hoisted and inserted into the pre-embedded sleeve, each tensioning screw 8 is simultaneously placed on the corresponding lifting device. Thus, during the subsequent lifting and screwing-in installation work, it is not necessary to manually lift and place the tensioning screw 8 on the top of the support plate 2 of this lifting device.

[0027] In some embodiments, three lifting mechanisms 4 are arranged in a circumferential array at the bottom of the base 1, and positioning grooves 11 are provided at the bottom of the base 1 corresponding to the lifting mechanisms 4. In this way, the three lifting mechanisms 4 can provide stable and reliable support for the base 1, and the positioning grooves 11 can provide construction personnel with the installation position indication of the lifting mechanisms 4. This can not only improve the efficiency of installing the lifting mechanisms 4, but also ensure the uniformity of the distribution of the three lifting mechanisms 4 in the circumferential direction of the base 1, thereby ensuring the stability of the support for the base 1.

[0028] In some embodiments, both the base 1 and the support plate 2 are circular flat structures. This improves the adaptability of the base 1 and the support plate 2 to the placement position and makes the base 1 and the support plate 2 unrestricted by the placement direction. It can fully adapt to the situation where the space is narrow at the installation position of the turbine seat ring tensioning screw 8 in the pumped storage power station. The disassembly and assembly of this lifting device is convenient and efficient, which can effectively improve the efficiency of construction personnel in setting up this lifting device, thereby improving construction efficiency.

[0029] Finally, it should be noted that although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, all of which should be included within the protection scope of this application.

Claims

1. A device for lifting the tension screw of a turbine bearing ring, characterized in that: Includes a base (1), a support plate (2), a turntable bearing (3), a lifting mechanism (4), a bracket (5), a positioning bolt (6), and a positioning stop (7). The base (1) and the support plate (2) are flat structures. The support plate (2) is used to support the tensioning screw (8) to be installed. The support plate (2) is rotatably fixed on the top of the base (1) through the turntable bearing (3). The lifting mechanism (4) is located at the bottom of the base (1). The top of the tray (2) is equipped with several brackets (5) arranged in a circumferential array. The brackets (5) are horizontally installed with positioning bolts (6) by threads. Each positioning bolt (6) is set to point towards the center of the tray (2). The positioning block (7) is fixedly installed at the end of the positioning bolt (6) facing the center of the tray (2). During construction, each positioning block (7) clamps the lower end of the tensioning screw (8).

2. The turbine seat ring tensioning screw lifting device according to claim 1, characterized in that: The bracket (5) includes a support plate (51), a reinforcing plate (52), and a sleeve (53). The support plate (51) is fixedly installed on the top of the support plate (2). The reinforcing plate (52) is fixedly installed between the support plate (51) and the support plate (2). The sleeve (53) is horizontally fixedly installed on the support plate (51). The sleeve (53) is positioned pointing towards the center of the support plate (2). The sleeve (53) is hollow inside and has internal threads. The positioning bolt (6) is installed on the sleeve (53) through the threads.

3. The turbine mounting ring tensioning screw lifting device according to claim 1 or 2, characterized in that: The pallet (2) has a placement groove (21) at the top center, and the diameter of the placement groove (21) is larger than the diameter of the tensioning screw (8).

4. The turbine seat ring tensioning screw lifting device according to claim 1, characterized in that: At least three lifting mechanisms (4) are arranged in a circumferential array at the bottom of the base (1), and a positioning groove (11) is provided at the bottom of the base (1) corresponding to the lifting mechanism (4).

5. The turbine mounting ring tensioning screw lifting device according to claim 1 or 4, characterized in that: Both the base (1) and the support plate (2) are circular flat plate structures.

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