A hoisting device for steam turbine valve turnaround

Abstract

The application discloses a hoisting device for steam turbine valve turnover, and relates to a crane field, which comprises a hoisting host and a rotating hoisting arm, an adjusting arm is movably installed on the rotating hoisting arm, a lifting hook for hoisting the valve is movably installed on the adjusting arm, a driving rotating seat is rotatably installed on the top side of the hoisting host, and the rotating hoisting arm is movably installed on the driving rotating seat. It is to be noted that, in the application, when hoisting, if the rotating hoisting arm meets with staff or obstacles that cannot be pushed away, the rotating hoisting arm is separated from the driving rotating seat, the continuous rotation of the rotating hoisting arm is avoided, and the valve is prevented from contacting the staff or the obstacles, thereby avoiding the problem of production accidents. In addition, when the rotating hoisting arm rotates to one side, the auxiliary supporting seat on the side synchronously extends to actively assist in supporting the hoisting host, the eccentric load force of one-side rotation of the hoisting arm is counteracted in a targeted manner, and the problem of rollover is prevented.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and in particular to a hoisting device for the turnover of steam turbine valves. Background Technology

[0002] A steam turbine is an external combustion rotary machine that converts the thermal energy of steam into mechanical work. Steam from the boiler enters the turbine and passes through a series of annularly arranged nozzles and blades, converting the steam's thermal energy into the mechanical energy of the turbine rotor's rotation. Different energy conversions within the turbine result in steam turbines operating on different principles. The turbine valve system is a critical piece of equipment ensuring the safe operation of the unit. Valves require welding during production, and because they are used on steam turbines, they are relatively large and heavy. Therefore, moving them within the workshop requires the use of a mobile hoisting trolley.

[0003] When mobile mini cranes are in operation, the dense equipment and materials in the workshop create numerous blind spots when the boom and hook are rotating. Existing passive anti-collision devices, such as anti-collision strips, can only be triggered after a collision and cannot identify obstacles or personnel in advance, making it easy for personal injury or equipment collisions to occur, resulting in high safety risks. Moreover, the workshop environment is harsh due to dust, oil, and mechanical vibration. Electrical limit switches and power-off devices are prone to poor contact and malfunction, and cannot effectively stop the boom from rotating after encountering obstacles, resulting in low reliability of protection. In addition, the existing mini crane supports lack specificity. Unilateral rotation can easily lead to the crane tipping over. When the boom rotates on one side, the crane is unbalanced on one side. Furthermore, the support effect of the existing integral counterweight frame is not specific enough. Due to their light weight and high center of gravity, mini cranes are prone to tipping over, resulting in poor operational stability and easy safety risks. Summary of the Invention

[0004] The purpose of this invention is to provide a hoisting device for the turnover of steam turbine valves, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A hoisting device for the turnover of steam turbine valves includes a hoisting main unit and a rotating hoisting arm. An adjustable boom is movably mounted on the rotating hoisting arm, and a hook for hoisting valves is movably mounted on the adjustable boom. A drive swivel is rotatably mounted on the top side of the hoisting main unit, and the rotating hoisting arm is movably mounted on the drive swivel. Support seats and casters are installed at the four corners of the bottom side of the hoisting main unit, and an installation base is installed on the bottom side of the hoisting main unit.

[0007] The lifting host is equipped with a follow-up pre-contact device, which is used to isolate the rotating lifting arm; the follow-up pre-contact device includes a follow-up rotating frame, which is installed on the rotating lifting arm. The rotation of the rotating lifting arm drives the follow-up rotating frame to rotate synchronously. Two extrusion slides are slidably installed on the follow-up rotating frame, and a pre-contact plate is installed on each of the two extrusion slides.

[0008] It also includes a follow-up extension support device, which is installed on the mounting base and is used to provide auxiliary support for the hoisting host. The follow-up extension support device includes three auxiliary support seats. Three extension pushers are slidably installed in a ring on the bottom side of the mounting base. The three auxiliary support seats are respectively installed on the three extension pushers. Two extension rollers are rotatably installed on the bottom side of the auxiliary support seats. The extension pushers extend and drive the auxiliary support seats to extend, which is used to provide auxiliary support for one side of the hoisting host.

[0009] Furthermore, in a preferred embodiment of the present invention, the follow-up pre-contact device further includes a pull-out unlocking frame, which is slidably mounted on the follow-up rotating frame;

[0010] Multiple support rotating rods are installed in a ring at equal intervals on the bottom side of the follow-up rotating frame, and a support rotating groove is opened on the top side of the hoisting host, and the multiple support rotating rods are rotatably installed in the support rotating groove;

[0011] A connecting block is installed on the follower rotating frame, the pull-out unlocking frame is slidably installed on the connecting block, and a lifting spring is installed between the connecting block and the pull-out unlocking frame.

[0012] Furthermore, in a preferred embodiment of the present invention, a plurality of linkage rods are movably mounted in a ring at equal intervals on the rotating lifting arm, and the plurality of linkage rods are all mounted on the pull-out unlocking frame;

[0013] The top side of the drive rotary seat is provided with a plurality of linkage slots at equal intervals in a ring, and the plurality of linkage rods are respectively inserted into the plurality of linkage slots.

[0014] Furthermore, in a preferred embodiment of the present invention, two inclined push plates are installed on the pull-out unlocking frame, and a transverse push plate is installed on the side of the two compression slides that are close to each other. The movement of the compression slides drives the transverse push plate to compress the inclined push plate and move, thereby driving the pull-out unlocking frame to rise.

[0015] Two protective springs are installed on one side of the extrusion slide, and the protective springs are installed on the inner wall of the follower rotating frame.

[0016] Furthermore, in a preferred embodiment of the present invention, the follow-up extension support device further includes three extension rotating seats, all of which are rotatably mounted on the bottom side of the mounting base;

[0017] Each of the three extended rotating seats is equipped with an extended rotating rod, and the rotation of the extended rotating seat drives the extended rotating rod to rotate synchronously.

[0018] Furthermore, in a preferred embodiment of the present invention, a retraction groove is provided on the extended rotating seat, and an installation rotating shaft is rotatably mounted in the retraction rotating groove, the installation rotating shaft being mounted on the bottom side of the mounting base;

[0019] A retraction torsion spring is mounted on the mounting shaft, and the retraction torsion spring is installed on the inner wall of the retraction groove.

[0020] Furthermore, in a preferred embodiment of the present invention, a drive push shaft is rotatably mounted on the extended rotating rod, a drive push groove is provided on the extended push frame, and the drive push shaft is movably mounted in the drive push groove;

[0021] The extension rod rotates and drives the extension pusher to move through the drive push shaft. Three push-pull limiting slots are provided on the bottom side of the mounting base, and the three extension pushers are slidably installed in the three push-pull limiting slots respectively.

[0022] Furthermore, in a preferred embodiment of the present invention, a linkage synchronization device is also included. The linkage synchronization device is mounted on the mounting base, and the linkage synchronization device is connected to the follow-up extension support device in a transmission manner. The linkage synchronization device is used to drive the follow-up extension support device to unfold.

[0023] The linkage synchronization device includes three lifting linkage frames. The mounting base has a mounting cavity. The three lifting linkage frames are movably installed in the mounting cavity, and the three lifting linkage frames are respectively movably connected to the three extended rotating seats.

[0024] Furthermore, in a preferred embodiment of the present invention, each of the three lifting linkage frames is equipped with a downward pressing curved frame, and a pressing semicircular block is installed on the bottom side of the follower rotating frame. The rotation of the follower rotating frame drives the pressing semicircular block to press the downward pressing curved frame downward.

[0025] The lifting linkage frame is equipped with multiple lifting springs, and all of the lifting springs are installed on the inner wall of the mounting cavity.

[0026] Furthermore, in a preferred embodiment of the present invention, a drive push shaft is installed on the lifting linkage frame, and an arc-shaped drive groove is opened on the surface of the extended rotating seat. The end of the drive push shaft is movably installed in the drive groove. The movement of the lifting linkage frame drives the drive push shaft to move in the drive groove, thereby driving the extended rotating seat to rotate.

[0027] The advantages of the hoisting device for the turnover of steam turbine valves proposed in this invention are:

[0028] In this invention, by setting up a follow-up pre-contact device, when the rotating hoist arm lifts the valve, it drives the follow-up rotating frame to rotate synchronously. If it encounters workers or obstacles that cannot be pushed away, the squeezing slide causes the transverse push plate to squeeze the inclined push plate, which in turn causes the inclined push plate to move the pull-out unlocking frame upward. The pull-out unlocking frame moves vertically on the connecting block, and the lifting spring is stressed. At the same time, the pull-out unlocking frame moves upward and disengages from the linkage slot, causing the rotating hoist arm to separate from the drive rotating seat. This prevents the rotating hoist arm from continuing to rotate, achieving pre-collision warning and protection, avoiding the problem of the valve coming into contact with workers or obstacles due to the continuous rotation of the rotating hoist arm, which could cause a production accident. This achieves the goal of upgrading from passive protection to active pre-protection, significantly reducing the risk of accidents. In addition, the mechanical separation mechanism has a simple structure and is not easily affected by workshop dust, oil, or vibration, greatly improving the stability of protection and reducing safety accidents caused by equipment failure.

[0029] Furthermore, in this invention, by setting up a follow-up extension support device, when the rotating boom drives the follow-up rotating frame to rotate, the extension pusher drives the auxiliary support seat to extend. The auxiliary support seat moves through two extension rollers, so that when the rotating boom rotates to a certain side, the auxiliary support seat on that side extends synchronously to actively assist the lifting host, specifically counteracting the eccentric load of the boom rotating on one side, effectively preventing the small crane from tipping over due to the shift of the center of gravity, improving operational stability. Moreover, compared with the overall counterweight frame, the support force of the single-sided counterweight frame is more precise, adapting to the frequent, small-range, and eccentric rotation operation characteristics of small cranes in workshops, solving the stability pain point of small cranes with light weight and high center of gravity. The counterweight frame can also push people away when it extends, realizing the function of active detection, further avoiding the occurrence of safety accidents.

[0030] Furthermore, in this invention, by setting up a linkage synchronization device, when the follower frame rotates, it drives the extrusion semicircular block to rotate. The extrusion semicircular block extrudes the downward pressing curved frame in the corresponding direction, causing the downward pressing curved frame to drive the lifting linkage frame on that side to move downward, and causing multiple rising springs to be compressed. At the same time, the downward movement of the lifting linkage frame drives the drive push shaft to move within the drive curved groove, thereby driving the extension rotating seat to rotate. This achieves the purpose of synchronously driving the auxiliary support seat to automatically extend when the follower frame rotates. In addition, the follower frame, separation mechanism, and single-sided counterweight frame are all modular designs with no redundant structures. They are adapted to the lightweight and miniaturized structural characteristics of small workshop cranes, eliminating the need for large-scale modifications to the original cranes. Automatic linkage control simplifies the operation process, improves workshop operation efficiency, and the modular structural design can be directly installed on existing small workshop cranes. The modification difficulty and cost are low, making it suitable for upgrading and modifying existing workshop equipment and possessing good industrial application value. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of a hoisting device for the turnover of steam turbine valves provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the connection between the follower rotating frame and auxiliary support base of a hoisting device for the turnover of steam turbine valves, provided in an embodiment of the present invention.

[0033] Figure 3 This is a partial structural diagram of the connection between the pull-out unlocking frame and the supporting rotating rod of a hoisting device for the turnover of steam turbine valves provided in an embodiment of the present invention;

[0034] Figure 4 This is a partial cross-sectional view of the connection between the pull-out unlocking frame and the linkage rod of a hoisting device for the turnover of steam turbine valves provided in an embodiment of the present invention.

[0035] Figure 5 This is a partial structural diagram of the connection between the inclined push plate and the transverse push plate of a hoisting device for the turnover of steam turbine valves, provided in an embodiment of the present invention.

[0036] Figure 6 This is a partial cross-sectional view of the connection between the follow-up rotating frame and the pull-out unlocking frame of a hoisting device for the turnover of steam turbine valves provided in an embodiment of the present invention.

[0037] Figure 7 A hoisting device for the turnover of steam turbine valves is provided in an embodiment of the present invention. Figure 1 A schematic diagram of the structure of part A in the middle;

[0038] Figure 8This is a schematic diagram of the structure connecting the lower pressure curved frame and the extrusion semi-circular block of a hoisting device for the turnover of steam turbine valves, provided in an embodiment of the present invention.

[0039] Figure 9 This is a partial structural diagram illustrating the connection between the extended rotating rod and the extended rotating seat of a hoisting device for the turnover of steam turbine valves, as provided in an embodiment of the present invention.

[0040] Figure 10 This is a partial cross-sectional view of the connection between the lifting linkage frame and the drive push shaft of a hoisting device for the turnover of steam turbine valves, provided in an embodiment of the present invention.

[0041] In the diagram: 1-Lifting main unit; 2-Rotating lifting boom; 3-Adjusting boom; 4-Drive rotating seat; 5-Hook; 6-Mounting base; 7-Following pre-contact device; 701-Following rotating frame; 702-Extrusion slide; 703-Pre-contact plate; 704-Protective spring; 705-Pull-out unlocking frame; 706-Linkage insert rod; 707-Linkage slot; 708-Support rotating rod; 709-Support rotating groove; 710-Connecting block; 711-Inclined push plate; 712-Horizontal push plate; 713-Lifting spring; 8-Following extension support device; 801- Auxiliary support base; 802-Extend roller; 803-Extend rotating rod; 804-Extend push frame; 805-Extend rotating seat; 806-Push-pull limiting groove; 807-Retract rotating groove; 808-Installation rotating shaft; 809-Retract torsion spring; 810-Drive push groove; 811-Drive push shaft; 9-Linkage synchronization device; 901-Lifting linkage frame; 902-Installation cavity; 903-Drive push shaft; 904-Drive curved groove; 905-Rising spring; 906-Pressing curved frame; 907-Extruding semi-circular block; 10-Support base; 11-Moving wheel. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] Furthermore, in the description of this invention, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, terms such as "horizontal," "vertical," and "perpendicular" do not imply that components must be absolutely vertical, but rather that they can be slightly tilted. For example, "vertical" simply means that its direction is more vertical relative to "horizontal," not that the structure must be completely vertical, but can be slightly tilted.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Please refer to the attached instruction manual. Figures 1-10 The present invention provides a hoisting device for the turnover of steam turbine valves, which includes a hoisting host 1 and a rotating hoisting arm 2. An adjusting arm 3 is movably installed on the rotating hoisting arm 2, and a hook 5 for hoisting valves is movably installed on the adjusting arm 3. A drive swivel 4 is rotatably installed on the top side of the hoisting host 1, and the rotating hoisting arm 2 is movably installed on the drive swivel 4. Support seats 10 and moving wheels 11 are installed at the four corners of the bottom side of the hoisting host 1, and an installation base 6 is installed on the bottom side of the hoisting host 1.

[0049] Further, please refer to the appendix to the instruction manual. Figures 2-6This invention provides a hoisting device for the turnover of steam turbine valves. The hoisting host 1 is equipped with a follow-up pre-contact device 7, which is used to isolate the rotating hoisting arm 2. Specifically, the follow-up pre-contact device 7 includes a follow-up rotating frame 701, which is installed on the rotating hoisting arm 2. The rotation of the rotating hoisting arm 2 drives the follow-up rotating frame 701 to rotate synchronously. Two extrusion slides 702 are slidably installed on the follow-up rotating frame 701, and each of the two extrusion slides 702 is equipped with a pre-contact plate 703. It should be noted that in this embodiment of the invention, when the rotating lifting arm 2 rotates and drives the follower rotating frame 701 to rotate synchronously, if it encounters a worker or obstacle that cannot be pushed away, the pull-out unlocking frame 705 moves upward and drives multiple linkage rods 706 to disengage from multiple linkage slots 707, so that the rotating lifting arm 2 separates from the drive rotating seat 4, thereby preventing the rotating lifting arm 2 from continuing to rotate, thus avoiding the problem of the valve coming into contact with the worker or obstacle due to the continuous rotation of the rotating lifting arm 2, which could cause a production accident.

[0050] More specifically, in this embodiment of the invention, a follow-up extension support device 8 is also included. The follow-up extension support device 8 is installed on the mounting base 6 and is used to provide auxiliary support for the hoisting host 1. The follow-up extension support device 8 includes three auxiliary support seats 801. Three extension pushers 804 are slidably mounted in a ring on the bottom side of the mounting base 6. The three auxiliary support seats 801 are respectively mounted on the three extension pushers 804. Two extension rollers 802 are rotatably mounted on the bottom side of the auxiliary support seats 801. The extension pushers 804 extend and drive the auxiliary support seats 801 to extend, which is used to provide auxiliary support for one side of the hoisting host 1. It should be noted that in this embodiment of the invention, when the rotating boom 2 drives the follower rotating frame 701 to rotate, the auxiliary support seat 801 of the extended push frame 804 on that side extends. The auxiliary support seat 801 moves through two extended rollers 802, so that when the rotating boom 2 rotates to a certain side, the auxiliary support seat 801 on that side extends synchronously to provide active auxiliary support for the lifting host 1 and ensure the stability of the lifting host 1 in lifting the valve.

[0051] Please continue to refer to the instruction manual appendix. Figures 2-6 Furthermore, the hoisting device for the turnover of steam turbine valves provided in this embodiment of the invention includes a pull-out unlocking frame 705, which is slidably installed on the follower rotating frame 701; a plurality of support rotating rods 708 are installed equidistantly in a ring on the bottom side of the follower rotating frame 701, and a support rotating groove 709 is opened on the top side of the hoisting host 1, and the plurality of support rotating rods 708 are rotatably installed in the support rotating groove 709;

[0052] Furthermore, a connecting block 710 is installed on the follower rotating frame 701, and the pull-out unlocking frame 705 is slidably installed on the connecting block 710. A lifting spring 713 is installed between the connecting block 710 and the pull-out unlocking frame 705. It should be noted that, in this embodiment of the invention, when the pre-contact plate 703 is pressed, the pull-out unlocking frame 705 moves vertically on the connecting block 710, and the lifting spring 713 is subjected to force. At the same time, the pull-out unlocking frame 705 moves upward, causing multiple linkage rods 706 to disengage from multiple linkage slots 707, thereby separating the rotating lifting arm 2 from the drive rotating seat 4. Subsequently, the rotating lifting arm 2 stops rotating. At this time, the rotating lifting arm 2 is supported by multiple support rotating rods 708, avoiding the problem that the rotating lifting arm 2 continues to rotate when encountering obstacles.

[0053] More specifically, in this embodiment of the invention, a plurality of linkage rods 706 are movably mounted in a ring at equal intervals on the rotating lifting arm 2, and all the linkage rods 706 are mounted on the pull-out unlocking frame 705; in addition, a plurality of linkage slots 707 are provided in a ring at equal intervals on the top side of the drive rotary seat 4, and the plurality of linkage rods 706 are respectively inserted into the plurality of linkage slots 707. It should be noted that, in this embodiment of the invention, when the pull-out unlocking frame 705 moves upward, the linkage rods 706 disengage from the linkage slots 707, thereby achieving the purpose of actively separating the rotating lifting arm 2 from the drive rotary seat 4.

[0054] More specifically, in this embodiment of the invention, two inclined push plates 711 are installed on the pull-out unlocking frame 705, and a transverse push plate 712 is installed on the side of the two pressing slides 702 that are close to each other. The movement of the pressing slides 702 drives the transverse push plate 712 to press the inclined push plate 711 to move, thereby driving the pull-out unlocking frame 705 to rise.

[0055] In addition, two protective springs 704 are installed on one side of the compression slide 702, and the protective springs 704 are installed on the inner wall of the follower rotating frame 701. It should be noted that, in this embodiment of the invention, when the compression slide 702 moves continuously, it drives the transverse push plate 712 to press the inclined push plate 711 to move, so that the inclined push plate 711 drives the pull-out unlocking frame 705 to move upward, thereby achieving the purpose of automatically unlocking the rotating lifting arm 2.

[0056] Please refer to the instruction manual attached. Figure 2 and Figures 7-10Furthermore, the hoisting device for turbine valve turnover provided in this embodiment of the invention includes a follow-up extension support device 8, which further comprises three extension rotating seats 805. All three extension rotating seats 805 are rotatably mounted on the bottom side of the mounting base 6. Each of the three extension rotating seats 805 is equipped with an extension rotating rod 803, and the rotation of the extension rotating seats 805 drives the extension rotating rods 803 to rotate synchronously. It should be noted that in this embodiment of the invention, when the lifting linkage frame 901 moves downward, the extension rotating seat 805 on that side drives the extension rotating rod 803 to rotate, thereby achieving the purpose of the extension push frame 804 on that side automatically extending the auxiliary support seat 801.

[0057] More specifically, in this embodiment of the invention, the extended rotating seat 805 has a retraction groove 807, and a mounting shaft 808 is rotatably mounted in the retraction groove 807. The mounting shaft 808 is mounted on the bottom side of the mounting base 6. A retraction torsion spring 809 is mounted on the mounting shaft 808, and the retraction torsion spring 809 is mounted on the inner wall of the retraction groove 807. It should be noted that in this embodiment of the invention, the extended rotating seat 805 rotates through the retraction groove 807 and rotates on the mounting shaft 808, causing the retraction torsion spring 809 to be stressed. Therefore, under the rotational force of the retraction torsion spring 809, the extended rotating seat 805 can be helped to return to its original position.

[0058] Please continue to refer to the instruction manual appendix. Figure 2 and Figures 7-10 More specifically, in this embodiment of the invention, a drive push shaft 811 is rotatably mounted on the extended rotating rod 803, and a drive push groove 810 is opened on the extended push frame 804, with the drive push shaft 811 movably mounted in the drive push groove 810;

[0059] Furthermore, the rotation of the extension rod 803 drives the push shaft 811 to move the extension push frame 804. Three push-pull limiting grooves 806 are provided on the bottom side of the mounting base 6, and the three extension push frames 804 are slidably installed within the three push-pull limiting grooves 806 respectively. It should be noted that, in this embodiment of the invention, when the extension rod 803 rotates, it drives the push shaft 811 to move the extension push frame 804, causing the push shaft 811 to slide within the push groove 810; when the extension push frame 804 moves, it slides horizontally within the push-pull limiting groove 806, achieving the purpose of automatically extending the extension push frame 804 when the extension rod 803 rotates.

[0060] Please refer to the instruction manual attached. Figure 3 and Figures 8-10 Furthermore, the hoisting device for the turnover of steam turbine valves provided in this embodiment of the invention also includes a linkage synchronization device 9. The linkage synchronization device 9 is installed on the mounting base 6. The linkage synchronization device 9 is connected to the follow-up extension support device 8 in a transmission manner. The linkage synchronization device 9 is used to drive the follow-up extension support device 8 to unfold.

[0061] Specifically, the linkage synchronization device 9 includes three lifting linkage frames 901. The mounting base 6 has a mounting cavity 902, and all three lifting linkage frames 901 are movably installed within the mounting cavity 902. Furthermore, each of the three lifting linkage frames 901 is movably connected to one of the three extended rotating seats 805. It should be noted that, in this embodiment of the invention, when the rotating lifting arm 2 drives the follower rotating frame 701 to rotate, the lifting linkage frame 901 on that side is compressed and moves downward synchronously, achieving the purpose of automatically pushing out the extended pusher 804 on that side.

[0062] More specifically, in this embodiment of the invention, each of the three lifting linkage frames 901 is equipped with a downward pressing curved frame 906, and a pressing semi-circular block 907 is installed on the bottom side of the follower rotating frame 701. The rotation of the follower rotating frame 701 drives the pressing semi-circular block 907 to press the downward pressing curved frame 906 downward.

[0063] Furthermore, multiple lifting springs 905 are installed on the lifting linkage frame 901, and all the lifting springs 905 are installed on the inner wall of the mounting cavity 902. It should be noted that, in this embodiment of the invention, when the follower rotating frame 701 rotates, it drives the extrusion semicircular block 907 to rotate, causing the extrusion semicircular block 907 to extrude the downward pressing curved frame 906 in the corresponding direction to move downward. The downward pressing curved frame 906 drives the lifting linkage frame 901 on that side to move downward, and causes the multiple lifting springs 905 to be compressed, so as to achieve the purpose of the lifting linkage frame 901 automatically moving downward as the follower rotating frame 701 rotates.

[0064] More specifically, in this embodiment of the invention, a drive push shaft 903 is installed on the lifting linkage frame 901, and an arc-shaped drive groove 904 is formed on the surface of the extended rotating seat 805. The end of the drive push shaft 903 is movably installed in the drive groove 904. The movement of the lifting linkage frame 901 drives the drive push shaft 903 to move within the drive groove 904, thereby driving the extended rotating seat 805 to rotate. It should be noted that in this embodiment of the invention, when the lifting linkage frame 901 moves downward, it drives the drive push shaft 903 to move within the drive groove 904, thereby driving the extended rotating seat 805 to rotate, achieving the purpose of the extended rotating seat 805 driving the extended rotating rod 803 to rotate automatically.

[0065] In summary, the working principle of the hoisting device for turbine valve turnover provided in this embodiment of the invention is as follows:

[0066] When the main hoist 1 lifts the valve, it is supported on the ground by multiple support seats 10. Then, the valve is hoisted onto the hook 5 by chains or other tools. The rotating hoist 2 is driven to rotate by the drive rotatable seat 4. The rotation of the rotating hoist 2 drives the hook 5 to rotate by adjusting the hoist 3, thereby realizing the rotation of the valve. At the same time, the rotating hoist 2 can also rotate in the support rotation groove 709 by multiple support rotating rods 708. When the rotating hoist 2 rotates, it drives the follower rotating frame 701 to rotate synchronously. During this process, the direction of rotation of the rotating hoist 2 is detected by the pre-contact plate 703.

[0067] Furthermore, if there are personnel or obstacles present, causing the pre-contact plate 703 to first contact them, the pre-contact plate 703 is compressed, causing the compression slide 702 to slide on the follower frame 701, simultaneously causing the protective spring 704 to be stressed; if the personnel or obstacles can be pushed away, the rebound force of the protective spring 704 causes the compression slide 702 to drive the pre-contact plate 703 to reset, thus allowing the testing to continue; if the personnel or obstacles cannot be pushed away, the compression slide 702 causes the transverse push plate to move. 712 presses the inclined push plate 711 to move, the inclined push plate 711 drives the pull-out unlocking bracket 705 to move upward, the pull-out unlocking bracket 705 moves vertically on the connecting block 710, and causes the lifting spring 713 to be stressed. At the same time, the upward movement of the pull-out unlocking bracket 705 causes multiple linkage rods 706 to disengage from multiple linkage slots 707, so that the rotating lifting arm 2 is separated from the drive rotating seat 4, and then the rotating lifting arm 2 stops rotating, avoiding the problem of the valve coming into contact with workers or obstacles due to the continuous rotation of the rotating lifting arm 2, which could cause a production accident. It should be noted that when the follower rotating frame 701 rotates, it drives the extrusion semicircular block 907 to rotate. The extrusion semicircular block 907 extrudes the downward pressing curved frame 906 in the corresponding direction to move downward, which causes the downward pressing curved frame 906 to drive the lifting linkage frame 901 on that side to move downward, and causes multiple rising springs 905 to be compressed. At the same time, the downward movement of the lifting linkage frame 901 drives the drive push shaft 903 to move in the drive curved groove 904, thereby driving the extended rotating seat 805 to rotate.

[0068] Furthermore, the extended rotating seat 805 rotates on the mounting shaft 808 via the retraction groove 807, causing the retraction torsion spring 809 to be stressed. Simultaneously, the rotation of the extended rotating seat 805 drives the extended rotating rod 803 to rotate. The extended rotating rod 803, through driving the push shaft 811, pushes the extended push frame 804 to move, causing the drive shaft 811 to slide within the drive groove 810. It should be noted that when the extended push frame 804 moves, it slides horizontally within the push-pull limiting groove 806, causing the extended push frame 804 to drive the auxiliary support seat 801 to extend. The auxiliary support seat 801 moves via two extended rollers 802, ensuring that the auxiliary support seat 801 on the corresponding side extends synchronously when the rotating boom 2 rotates to a certain side, providing active auxiliary support for the lifting host 1 and ensuring the stability of the lifting host 1 when lifting the valve.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A hoisting device for the turnover of steam turbine valves, characterized in that, It includes a hoisting main unit and a rotating hoisting arm. An adjustable boom is movably mounted on the rotating hoisting arm, and a hook for hoisting valves is movably mounted on the adjustable boom. A drive swivel is rotatably mounted on the top side of the hoisting main unit, and the rotating hoisting arm is movably mounted on the drive swivel. Support seats and casters are installed at the four corners of the bottom side of the hoisting main unit, and an installation base is installed on the bottom side of the hoisting main unit. The lifting host is equipped with a follow-up pre-contact device, which is used to isolate the rotating lifting arm; the follow-up pre-contact device includes a follow-up rotating frame, which is installed on the rotating lifting arm. The rotation of the rotating lifting arm drives the follow-up rotating frame to rotate synchronously. Two extrusion slides are slidably installed on the follow-up rotating frame, and a pre-contact plate is installed on each of the two extrusion slides. It also includes a follow-up extension support device, which is installed on the mounting base and is used to provide auxiliary support for the hoisting host. The follow-up extension support device includes three auxiliary support seats. Three extension pushers are slidably installed in a ring on the bottom side of the mounting base. The three auxiliary support seats are respectively installed on the three extension pushers. Two extension rollers are rotatably installed on the bottom side of the auxiliary support seats. The extension pushers extend and drive the auxiliary support seats to extend, which is used to provide auxiliary support for one side of the hoisting host. The follow-up pre-contact device also includes a pull-out unlocking frame, which is slidably mounted on the follow-up rotating frame; Multiple support rotating rods are installed in a ring at equal intervals on the bottom side of the follow-up rotating frame, and a support rotating groove is opened on the top side of the hoisting host, and the multiple support rotating rods are rotatably installed in the support rotating groove; A connecting block is installed on the follower rotating frame, the pull-out unlocking frame is slidably installed on the connecting block, and a lifting spring is installed between the connecting block and the pull-out unlocking frame; Multiple linkage rods are movably mounted in a ring at equal intervals on the rotating lifting arm, and all of the multiple linkage rods are mounted on the pull-out unlocking frame. The top side of the drive rotary seat is provided with a plurality of linkage slots at equal intervals in a ring, and the plurality of linkage rods are respectively inserted into the plurality of linkage slots; The pull-out unlocking frame is equipped with two inclined push plates, and a transverse push plate is installed on the side of the two squeezing slides that are close to each other. The movement of the squeezing slides drives the transverse push plate to squeeze the inclined push plate to move, thereby driving the pull-out unlocking frame to rise. Two protective springs are installed on one side of the extrusion slide, and the protective springs are installed on the inner wall of the follower rotating frame.

2. The hoisting device for the turnover of steam turbine valves according to claim 1, characterized in that, The follow-up extension support device also includes three extension rotating seats, all of which are rotatably mounted on the bottom side of the mounting base; Each of the three extended rotating seats is equipped with an extended rotating rod, and the rotation of the extended rotating seat drives the extended rotating rod to rotate synchronously.

3. The hoisting device for the turnover of steam turbine valves according to claim 2, characterized in that, The extended rotating seat is provided with a retraction groove, and an installation rotating shaft is rotatably installed in the retraction rotating groove. The installation rotating shaft is installed on the bottom side of the mounting base. A retraction torsion spring is mounted on the mounting shaft, and the retraction torsion spring is installed on the inner wall of the retraction groove.

4. A hoisting device for the turnover of steam turbine valves according to claim 3, characterized in that, A drive push shaft is rotatably mounted on the extended rotating rod, and a drive push groove is opened on the extended push frame, with the drive push shaft movably installed in the drive push groove; The extension rod rotates and drives the extension pusher to move through the drive push shaft. Three push-pull limiting slots are provided on the bottom side of the mounting base, and the three extension pushers are slidably installed in the three push-pull limiting slots respectively.

5. A hoisting device for the turnover of steam turbine valves according to claim 4, characterized in that, It also includes a linkage synchronization device, which is mounted on the mounting base and is connected to the follow-up extension support device. The linkage synchronization device is used to drive the follow-up extension support device to unfold. The linkage synchronization device includes three lifting linkage frames. The mounting base has a mounting cavity. The three lifting linkage frames are movably installed in the mounting cavity, and the three lifting linkage frames are respectively movably connected to the three extended rotating seats.

6. A hoisting device for the turnover of steam turbine valves according to claim 5, characterized in that, Each of the three lifting linkage frames is equipped with a downward pressing curved frame, and a pressing semicircular block is installed on the bottom side of the follower rotating frame. The rotation of the follower rotating frame drives the pressing semicircular block to press the downward pressing curved frame downward. The lifting linkage frame is equipped with multiple lifting springs, and all of the lifting springs are installed on the inner wall of the mounting cavity.

7. A hoisting device for the turnover of steam turbine valves according to claim 6, characterized in that, A drive push shaft is installed on the lifting linkage frame, and an arc-shaped drive groove is opened on the surface of the extended rotating seat. The end of the drive push shaft is movably installed in the drive groove. The movement of the lifting linkage frame drives the drive push shaft to move in the drive groove, thereby driving the extended rotating seat to rotate.

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