A large valve shaft mounting and dismounting device

Abstract

This invention discloses a large valve shaft assembly and disassembly device, comprising a main lifting beam, a lifting component, and a positioning component. The lifting component includes an adjusting sling on one side and a wire rope sling on the opposite side. The bottom end of the adjusting sling and the bottom end of the wire rope sling are connected to any two lifting holes of the main lifting beam via shackles. The positioning component includes a long pin, a fixing nut, and a positioning flange assembly. One end of the long pin near the bottom of the main lifting beam passes through the upper lifting hole and is secured by the fixing nut, while the other end passes through the positioning flange assembly and is fixedly connected to a bearing located at its center. At least two push-in components and several fixing bolts are symmetrically installed on the outer end face of the positioning flange assembly. Pull-out components are detachably installed at the center positions of the two flange plates of the positioning flange assembly. This invention provides simpler and faster operation for installation and disassembly, fulfilling the functions of lifting, installing, and disassembling valve shafts, and making valve shaft docking more precise.

Description

Technical Field

[0001] This invention relates to the field of valve shaft assembly and disassembly technology, and in particular to a large valve shaft assembly and disassembly device. Background Technology

[0002] The valve industry plays a crucial role in the national economic development as a vital link in the equipment manufacturing sector. Currently, the construction of power plants is trending towards large-scale operations, leading to a significant increase in the demand for large-diameter valves. With the increase in valve diameter, the valve shaft's diameter and weight also increase. Consequently, the installation and disassembly of these large-tonnage, large-diameter valve shafts become more difficult. Currently, valve shaft installation involves directly lifting the valve shaft, while disassembly uses bolts to push the shaft out of the valve bit by bit. This process is cumbersome and time-consuming. Furthermore, lifting large-tonnage, large-diameter valve shafts for installation and disassembly presents considerable difficulties with the existing lifting methods, making the operations virtually impossible. To address these issues, a valve shaft installation and disassembly tool is designed to meet the requirements of large-diameter valve shaft installation and disassembly. This tool should not only satisfy the requirements of valve shaft installation and disassembly operations but also reduce the frequency of tool changes, lower labor intensity, and improve work efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a large valve shaft assembly and disassembly device suitable for the installation and disassembly of large-tonnage, large-diameter valve shafts.

[0004] To achieve the above objectives, the present invention provides a large valve shaft assembly and disassembly device, comprising a main lifting beam, a lifting component, and a positioning component. The main lifting beam is inverted L-shaped, the lifting component is connected to the top end of the main lifting beam, and the positioning component is installed at the bottom end of the main lifting beam; wherein, The main lifting beam has several small lifting holes evenly arranged on the upper part of its horizontal end, and a lower lifting hole is provided on the lower part of its vertical end. The hoisting component includes an adjusting sling on one side and a wire rope sling on the opposite side. The top end of the adjusting sling is connected to the top end of the wire rope sling, and the bottom end of the adjusting sling and the bottom end of the wire rope sling are respectively connected to any two hoisting holes of the main lifting beam through shackles to maintain the hoisting balance of the device. The positioning component includes a long pin, a fixing nut, and a positioning flange assembly. One end of the long pin, near the bottom of the main lifting beam, passes through the lower lifting hole and is fastened by the fixing nut. The other end, away from the main lifting beam, passes through the positioning flange assembly and is fixedly connected to the bearing located at its center. At least two push-in components and several fixing bolts are symmetrically installed on the outer end face of the positioning flange assembly. The several fixing bolts are used to connect with the valve shaft lifting threaded hole on the valve shaft, and the at least two push-in components are used to push the valve shaft into the center mounting hole of the valve. The positioning flange assembly has wing plates on both sides, and each of the two wing plates has a detachable pull-out component at its center, which is used to pull the valve shaft out of the valve.

[0005] Furthermore, the push-in assembly includes a hollow hydraulic cylinder, a long screw, and a nut. The long screw passes through the outer end face of the positioning flange assembly and exits through the valve shaft hole. The hollow hydraulic cylinder is mounted on the long screw and connected by the nut to fit tightly against the outer end face of the positioning flange assembly.

[0006] Furthermore, the extraction component is a single-acting hydraulic cylinder.

[0007] Furthermore, the adjusting rigging includes a long lifting ring and a hand chain hoist, the hand chain hoist being movably connected to the lower side of the long lifting ring, and a shackle being connected to the end of the hand chain hoist; the other end of the long lifting ring is movably connected to the top end of the wire rope rigging.

[0008] Furthermore, the positioning component also includes several long guide rods and several short guide rods that are connected to the several fixing bolts respectively. The several long guide rods and several short guide rods pass through the positioning flange assembly and exit through the corresponding valve shaft flange holes.

[0009] Furthermore, a fixing plate is welded at the right angle of the main lifting beam.

[0010] Furthermore, several adjustable counterweights are installed at the horizontal end of the main lifting beam.

[0011] Compared with the prior art, the advantages of this invention are as follows: The large valve shaft assembly and disassembly device designed in this invention ensures that the center of gravity of the valve shaft is always in a balanced state by adjusting the cooperation of the rigging and wire rope rigging, thus realizing the horizontal hoisting of the valve shaft. By alternating the pushing-in component and the pulling-out component, the installation and disassembly of the valve shaft can be completed, thereby achieving the purpose of multiple uses in one device.

[0012] This device is easier and faster to operate in terms of installation and disassembly, saving labor costs and improving work efficiency. It meets the functions of lifting, installing and disassembling valve shafts, and makes valve shaft docking more precise. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the large valve shaft assembly and disassembly device of the present invention. Figure 2 This is a side view of the large valve shaft assembly / disassembly device of the present invention; Figure 3 This is a partial AA-plane cross-sectional view of the positioning component of the present invention; Figure 4 This is a partial BB-plane cross-sectional view of the positioning component of the present invention; Figure 5 This is a partial CC-plane cross-sectional view of the positioning component of the present invention.

[0014] Among them, 1-long lifting ring, 2-hand chain hoist, 3-wire rope sling, 4-shackle, 5-main lifting beam, 6-counterweight, 7-fixing nut, 8-long pin shaft, 9-positioning flange assembly, 10-single-acting hydraulic cylinder, 11-bearing, 12-fixing bolt, 13-nut, 14-long screw, 15-hollow hydraulic cylinder, 16-long guide rod, 17-short guide rod, 18-lower lifting hole, 19-lifting hole, 20-valve shaft, 21-wing plate. Detailed Implementation

[0015] The following description, with reference to the accompanying drawings, is provided to facilitate understanding of the technical solutions of the present invention by those skilled in the art. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention.

[0016] In the following detailed description, numerous specific details are set forth for ease of explanation to provide a full understanding of embodiments of the invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0017] Please see Figure 1 and 2 This is a schematic diagram of the overall structure of the large valve shaft assembly and disassembly device of the present invention, including a main lifting beam 5, a lifting component, and a positioning component. The main lifting beam 5 is inverted L-shaped, the lifting component is connected to the top of the main lifting beam 5, and the positioning component is installed at the bottom of the main lifting beam 5; wherein, Several small lifting holes 19 are evenly arranged on the upper part of the horizontal end of the main lifting beam 5, and a lower lifting hole 18 is provided on the lower part of the vertical end of the main lifting beam 5. In specific implementation, in order to increase the stability of the main lifting beam, a fixing plate is welded at its right angle, and several adjustable counterweights 6 are installed on its horizontal end to adjust according to the weight of the valve shaft 20 to ensure the overall balance of the device.

[0018] The lifting components include an adjusting sling on one side and a wire rope sling 3 on the opposite side. The top of the adjusting sling is connected to the top of the wire rope sling 3, and the bottom of the adjusting sling and the bottom of the wire rope sling 3 are connected to any two lifting holes 19 of the main lifting beam 5 via shackles 4 to maintain the lifting balance of the device. In specific implementation, the adjusting sling includes a long lifting ring 1 and a hand chain hoist 2. The hand chain hoist 2 is movably connected to the lower side of the long lifting ring 1, and the end of the hand chain hoist 2 is connected to the shackle 4. The other end of the long lifting ring 1 is movably connected to the top of the wire rope sling 3. This device can fix the shackle 4 in any one of the lifting holes 19 of the main lifting beam 5 according to the center of gravity position of the valve shaft to ensure lifting balance.

[0019] Please see Figure 3-5 The image shows a partial cross-sectional view of the positioning component of the present invention. The positioning component includes a long pin 8, a fixing nut 7, and a positioning flange assembly 9. One end of the long pin 8 near the bottom of the main lifting beam 5 passes through the lower lifting hole 18 and is fastened by the fixing nut 7. The other end of the long pin 8 away from the bottom of the main lifting beam passes through the positioning flange assembly 9 and is fixedly connected to the bearing 11 located at its center.

[0020] The long pin 8 passes through the bearing 11 from the outside of the positioning flange assembly 9, passes through the lower lifting hole 18 of the main lifting beam 5, and is fixed at the end with the fixing nut 7, so that the main lifting beam 5 and the positioning flange assembly are firmly assembled and fixed.

[0021] The outer end face of the positioning flange assembly 9 is symmetrically equipped with at least two push-in components and several fixing bolts 12. The fixing bolts 12 are used to connect with the valve shaft lifting threaded holes on the valve shaft 20. The at least two push-in components are used to push the valve shaft 20 into the central mounting hole of the valve. In a specific implementation, the positioning flange assembly 9 can be constructed by welding two side flange plates and an intermediate bushing, with the intermediate bushing sequentially embedded with bearings 11. Both sides of the positioning flange assembly 9 are provided with wing plates 21, and the center of each of the two wing plates 21 is detachably equipped with a pull-out component for pulling the valve shaft 20 out of the valve. In a specific implementation, the pull-out component is a single-acting hydraulic cylinder 10.

[0022] In this embodiment, the push-in assembly includes a hollow hydraulic cylinder 15, a long screw 14, and a nut 13. The long screw 14 passes through the outer end face of the positioning flange assembly 9 and exits through the valve shaft hole of the valve shaft 20. The hollow hydraulic cylinder 15 is mounted on the long screw 14 and connected by the nut 13 so that it fits tightly against the outer end face of the positioning flange assembly 9.

[0023] The positioning component also includes several long guide rods 16 and several short guide rods 17 that are connected to several fixing bolts 12. The long guide rods 16 and several short guide rods 17 pass through the positioning flange assembly 9 and out of the corresponding valve shaft threaded holes, which are used to align and calibrate with the flange holes and valve threaded holes of the valve shaft 20 during installation.

[0024] The following are the steps for using this device when installing the valve shaft: First, screw several long screws 14 into the screw holes of the valve. Four long screws can be arranged symmetrically. According to the center of gravity of the valve shaft 20, install the assembled adjusting rigging and wire rope rigging 3 into the lifting holes 19 of the main lifting beam 5 using shackles 4, and fix the positioning flange assembly 9 to the threaded hole on the end face of the valve shaft with multiple fixing bolts 12.

[0025] The second step involves lifting the device, which is equipped with four guide rods (specifically two long guide rods 16 and two short guide rods 17), smoothly pushing the guide rods into the shaft hole of the valve body, installing four long screws 14, and correspondingly inserting four hollow hydraulic cylinders 15 into the outer end face of the long screws 14 near the positioning flange assembly 9, and installing nuts 13 to fit them against the outer end face of the positioning flange assembly 9.

[0026] The third step is to use the hollow hydraulic cylinder 15 to slowly push the valve shaft 20 into the valve's valve seat hole. Since the hollow hydraulic cylinder 15 is clamped between the nut 13 and the outer end face of the positioning flange assembly 9, when it is started, it will push the valve shaft 20 into the valve seat hole until the two long guide rods 16 reach the bottom plane of the valve pin hole, and then pull out the long guide rods.

[0027] Fourth step, continue to push the valve shaft 20 with the hollow hydraulic cylinder 15 until the end face of the valve shaft 20 contacts the end face of the valve shaft hole to complete the action. At this time, the valve shaft installation and removal tools can be removed.

[0028] Procedures for removing the valve shaft: First, based on the center of gravity of the valve shaft 20, place the assembled adjusting rigging and wire rope rigging 3 into the lifting holes 19 of the main lifting beam 5 using shackles 4, and connect the positioning flange assembly 9 to the threaded hole on the end face of the valve shaft using 8 fixing bolts 12.

[0029] The second step is to place the single-acting hydraulic cylinder 10 on both sides of the positioning flange assembly 9 and tighten it with bolts.

[0030] The single-acting hydraulic cylinder 10 is driven to push the hydraulic rod against the valve body, which in turn causes the valve shaft 20 to be slowly pulled out.

[0031] In summary, the large valve shaft assembly and disassembly device designed in this invention ensures that the valve shaft's center of gravity remains in a balanced state by adjusting the coordination of the rigging and wire rope rigging, thus enabling the horizontal lifting of the valve shaft. The installation and disassembly of the valve shaft are completed by alternating the insertion and extraction components, thereby achieving a multi-purpose device.

[0032] This device is easier and faster to operate in terms of installation and disassembly, saving labor costs and improving work efficiency. It meets the functions of lifting, installing and disassembling valve shafts, and makes valve shaft docking more precise.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A large valve shaft mounting and demounting device characterized by, It includes a main lifting beam, lifting components, and positioning components. The main lifting beam is inverted L-shaped, with the lifting components connected to the top of the main lifting beam and the positioning components installed at the bottom of the main lifting beam; among which, The main lifting beam has several small lifting holes evenly arranged on the upper part of its horizontal end, and a lower lifting hole is provided on the lower part of its vertical end. The hoisting component includes an adjusting sling on one side and a wire rope sling on the opposite side. The top end of the adjusting sling is connected to the top end of the wire rope sling, and the bottom end of the adjusting sling and the bottom end of the wire rope sling are respectively connected to any two hoisting holes of the main lifting beam through shackles to maintain the hoisting balance of the device. The positioning component includes a long pin, a fixing nut, and a positioning flange assembly. One end of the long pin, near the bottom of the main lifting beam, passes through the lower lifting hole and is fastened by the fixing nut. The other end, away from the main lifting beam, passes through the positioning flange assembly and is fixedly connected to the bearing located at its center. At least two push-in components and several fixing bolts are symmetrically installed on the outer end face of the positioning flange assembly. The several fixing bolts are used to connect with the valve shaft lifting threaded hole on the valve shaft, and the at least two push-in components are used to push the valve shaft into the center mounting hole of the valve. The positioning flange assembly has wing plates on both sides, and a pull-out component can be detachably installed at the center of each of the two wing plates. The pull-out component is a single-acting hydraulic cylinder, which pushes the valve body to pull the valve shaft out of the valve. The push-in assembly includes a hollow hydraulic cylinder, a long screw, and a nut. The long screw passes through the outer end face of the positioning flange assembly and exits through the valve shaft hole. The hollow hydraulic cylinder is mounted on the long screw and connected by the nut to fit tightly against the outer end face of the positioning flange assembly.

2. The large valve shaft handling apparatus of claim 1, wherein The adjusting rigging includes a long lifting ring and a hand chain hoist. The hand chain hoist is movably connected to the lower side of the long lifting ring, and a shackle is connected to the end of the hand chain hoist. The other end of the long lifting ring is movably connected to the top of the wire rope rigging.

3. The large valve shaft handling apparatus of claim 2, wherein, The positioning component also includes several long guide rods and several short guide rods that are connected to the several fixing bolts respectively. The several long guide rods and several short guide rods pass through the positioning flange assembly and exit through the corresponding valve shaft threaded holes.

4. The large valve shaft handling apparatus of claim 1, wherein A fixing plate is welded at the right angle of the main lifting beam.

5. The large valve shaft handling apparatus of claim 1, wherein Several adjustable counterweights are installed at the horizontal end of the main lifting beam.

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