Tool and method for conveniently disassembling and assembling spray needle

Abstract

The invention belongs to the technical field of water turbines, and particularly relates to a tool and method for conveniently disassembling and assembling a spray needle. According to the technical scheme, the convenient dismounting and mounting tool for the spray needle comprises a positioning ring, the positioning ring is clamped on the spray needle, at least one clamping plate is connected to the positioning ring, an annular groove is formed in the non-flow-channel face of the spray needle, the end, away from the positioning ring, of the clamping plate is clamped in the annular groove, and a lifting hole is formed in the clamping plate. The invention provides the tool and the method for conveniently disassembling and assembling the spray needle, which are reliable in connection.

Description

Technical Field

[0001] The present invention belongs to the technical field of water turbines, and in particular relates to a tool and method for conveniently disassembling and assembling a spray needle. Background Art

[0002] Existing needle removal tools are an integral structure of a ring cylinder or two rings plus a connecting rib plate, and are commonly used on small and medium-sized units.

[0003] Patent application number CN201310063353.1 discloses a method for removing the nozzle needle of a Pelton turbine generator set. The method uses a double-sided wrench to remove the set screw, a mounting and removal cylinder is fitted over the nozzle needle, and a top cone is used to secure the mounting and removal cylinder to the needle. This method offers the beneficial technical benefit of removing or installing the nozzle needle without removing the nozzle cover, significantly reducing workload and maintenance time, thereby increasing power generation time for the power station.

[0004] However, the above method uses a mounting cylinder mounted on the nozzle needle, which can easily become loose and fall off the nozzle needle. For large nozzles, this structural design is heavy and inconvenient to install at high altitudes. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a tool and method for convenient disassembly and assembly of a spray needle with reliable connection.

[0006] The technical solution adopted in the present invention is: A tool for convenient disassembly and assembly of a spray needle comprises a positioning ring which is engaged on the spray needle and is connected to at least one clamping plate. An annular groove is provided on the non-flow channel surface of the spray needle, and an end of the clamping plate away from the positioning ring is engaged in the annular groove. A hanging hole is provided on the clamping plate.

[0007] One end of the clamping plate of the present invention is engaged with the ring on the end face of the spray needle, and the other end is connected to the positioning ring, and the positioning ring is engaged with the conical surface of the spray needle, so that the two ends of the disassembly and assembly tool of the present invention are respectively positioned and installed without loosening, thereby ensuring safety when lifting the spray needle.

[0008] The present invention utilizes the spray needle itself as the supporting structure of the lifting tool, thereby reducing the multi-ring and ring-cylinder structure of the traditional tool and lowering the structural weight.

[0009] The annular groove for engaging the clamping plate is set on the non-flow channel surface of the nozzle, so that the fixing installation hole does not need to be drilled in the flow channel and the integrity of the flow channel surface is not damaged. Therefore, the high-speed flow surface will not generate bubbles due to structural discontinuity, thereby avoiding cavitation.

[0010] The present invention can be matched with the number of clamping plates according to the weight of the spray needle, has a wide load range, does not affect the difficulty of installation, and is free to combine and convenient.

[0011] As a preferred embodiment of the present invention, the clamping plate and the positioning ring are connected by connecting bolts and tightened by a clamping nut. The bent end of the clamping plate is engaged with the ring groove of the spray needle, the positioning ring is engaged with the spray needle, and the clamping plate and the positioning ring are connected with connecting bolts and tightened by the clamping nut to secure the two ends of the disassembly and assembly tool.

[0012] As a preferred embodiment of the present invention, the positioning ring is provided with two lifting points. Both lifting points on the positioning ring are required to lift the spray needle when it is stored vertically, or to lift the spray needle when it is flipped from horizontal to vertical. For vertical lifting, both lifting points on the positioning ring are used.

[0013] As a preferred solution of the present invention, a plurality of weight-reducing grooves are provided on the positioning ring to reduce the weight of the disassembly and assembly tools.

[0014] As a preferred embodiment of the present invention, the line connecting the lifting hole and the center of gravity of the spray needle is perpendicular to the axis of the spray needle. When the assembly of the disassembly tool and the spray needle is lifted by a hand chain hoist, the axis of the spray needle can be kept horizontal, facilitating accurate disassembly and assembly of the spray needle and the spray needle shaft.

[0015] As a preferred solution of the present invention, the width of the annular groove is not less than 6 mm, and the depth of the annular groove is not less than 10 mm.

[0016] As a preferred embodiment of the present invention, the distance between the annular groove and the needle's flow path surface is no less than 9 mm. The annular groove is located on the needle's end face so that it does not interfere with the connection between the needle and the connecting flange, preventing the annular groove from being obscured by the connecting ring. Furthermore, the annular groove is sufficiently distant from the needle's flow path surface to ensure the strength of the needle's flow path surface in the area where the annular groove is located.

[0017] As a preferred solution of the present invention, a hand chain hoist is further included, and the steel wire rope of the hand chain hoist is connected to the lifting hole on the clamping plate.

[0018] As a preferred embodiment of the present invention, when removing the spray needle, a jacking bolt is installed on the connecting flange on the spray needle shaft to eject the spray needle. To remove the spray needle, first remove all the connecting bolts between the spray needle and the connecting flange, then use the jacking bolt to eject the spray needle. The spray needle is then hoisted to the floor using a hand chain hoist to complete the removal of the spray needle.

[0019] A method for conveniently disassembling and assembling a spray needle comprises the following steps: S1: Install the bent end of the clamp into the ring groove of the spray needle, and fix the other end of the clamp to the positioning ring with the connecting bolt and the tightening nut; S2: Install the lifting shackle on the lifting hole of the pallet, and connect the lifting shackle to the hand chain hoist with a steel wire; S3: When removing the spray needle: symmetrically remove all the connecting bolts on the spray needle, push out the spray needle with the lifting bolt, and lift the spray needle to the floor with a hand hoist to complete the removal of the spray needle; When installing the spray needle: use a hand hoist to lift the spray needle to the installation location, symmetrically tighten all the spray needle connecting bolts to complete the spray needle installation.

[0020] The beneficial effects of the present invention are: 1. One end of the clamping plate of the present invention engages with the ring on the end face of the spray needle, and the other end is connected to the positioning ring. The positioning ring engages with the conical surface of the spray needle. As a result, the two ends of the disassembly and assembly tool of the present invention are respectively positioned and installed without loosening, ensuring safety when lifting the spray needle.

[0021] 2. The present invention utilizes the spray needle itself as the supporting structure of the lifting tool, thereby reducing the multi-ring and ring-cylinder structure of the traditional tool and lowering the structural weight.

[0022] 3. The annular groove for engaging the clamping plate is set on the non-flow channel surface of the nozzle needle, so that the fixing installation hole is not drilled in the flow channel and the integrity of the flow channel surface is not damaged. Therefore, bubbles will not be generated on the high-speed flow surface due to structural discontinuity, thereby avoiding cavitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the structure of the spray needle; Figure 4 This is a schematic diagram of disassembling the spray needle.

[0024] In the figure: 1-spray needle; 2-clamping plate; 3-connecting bolt; 4-tightening nut; 5-locating ring; 6-connecting bolt; 7-lifting bolt; 8-hand hoist; 9-spray needle shaft; 11-ring groove; 21-lifting hole; 51-lifting point; 52-weight reduction groove; 91-connecting flange. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0027] like Figures 1 to 4 As shown, the convenient disassembly and assembly tool for the spray needle of this embodiment includes a positioning ring 5, which is engaged on the spray needle 1. At least one clamping plate 2 is connected to the positioning ring 5. An annular groove 11 is provided on the non-flow path surface of the spray needle 1. The end of the clamping plate 2 away from the positioning ring 5 is engaged in the annular groove 11, and a hanging hole 21 is provided on the clamping plate 2.

[0028] One end of the clamping plate 2 of the present invention is engaged with the ring on the end face of the spray needle 1, and the other end is connected to the positioning ring 5. The positioning ring 5 is engaged with the conical surface of the spray needle 1, so that the two ends of the disassembly and assembly tool of the present invention are respectively positioned and installed without loosening, thereby ensuring safety when hoisting the spray needle 1.

[0029] The present invention utilizes the spray needle 1 itself as a supporting structure of the lifting tool, thereby reducing the multi-ring and ring-cylinder structure of the traditional tool and lowering the structural weight.

[0030] The annular groove 11 for engaging the clamping plate 2 is arranged on the non-flow channel surface of the nozzle needle 1, so that a fixing installation hole does not need to be drilled in the flow channel, and the integrity of the flow channel surface is not damaged. Therefore, bubbles will not be generated on the high-speed flow surface due to structural discontinuity, thereby avoiding cavitation.

[0031] The present invention can be matched with the number of the clamping plates 2 according to the weight of the spray needle 1, has a wide load range, does not affect the difficulty of installation, and is free to combine and convenient.

[0032] The clamping plate 2 and the positioning ring 5 are connected by connecting bolts and tightened by the tightening nut 4. The bent end of the clamping plate 2 is engaged with the annular groove 11 of the spray needle 1, the positioning ring 5 is engaged with the spray needle 1, and the clamping plate 2 and the positioning ring 5 are connected by connecting bolts and tightened by the tightening nut 4 to secure the two ends of the disassembly and assembly tool.

[0033] Furthermore, the positioning ring 5 is provided with two lifting points 51. When the spray needle 1 is lifted when stored vertically, or when the spray needle 1 is lifted when flipped from horizontal to vertical, both lifting points 51 on the positioning ring 5 are required. When lifting vertically, the two lifting points 51 on the positioning ring 5 are used for lifting.

[0034] The positioning ring 5 is provided with a plurality of weight-reducing grooves 52 to reduce the weight of the disassembly and assembly tools.

[0035] Furthermore, the line connecting the lifting hole 21 and the center of gravity of the spray needle 1 is perpendicular to the axis of the spray needle 1. When the assembly of the disassembly tool and the spray needle 1 is lifted by the hand hoist 8, the axis of the spray needle 1 can be kept horizontal, facilitating accurate disassembly and assembly of the spray needle 1 and the spray needle shaft 9.

[0036] The width of the annular groove 11 is not less than 6 mm, and the depth of the annular groove 11 is not less than 10 mm.

[0037] The distance between the annular groove 11 and the flow path surface of the nozzle needle 1 is no less than 9 mm. The annular groove 11 is located on the end surface of the nozzle needle 1 so that it does not interfere with the connection between the nozzle needle 1 and the connecting flange 91, preventing the annular groove 11 from being obscured by the connecting ring. Furthermore, the annular groove 11 is sufficiently distant from the flow path surface of the nozzle needle 1 to ensure the strength of the flow path surface corresponding to the area where the annular groove 11 is located.

[0038] The present invention further comprises a hand chain hoist 8 , the steel wire rope of the hand chain hoist 8 is connected to the lifting hole 21 on the clamping plate 2 .

[0039] When removing the spray needle 1, install the jacking bolt 7 on the connecting flange 91 on the spray needle shaft 9 to eject the spray needle 1. When removing the spray needle 1, first remove all the connecting bolts 6 between the spray needle 1 and the connecting flange 91, then use the jacking bolt 7 to eject the spray needle 1. Use the hand chain hoist 8 to hoist the spray needle 1 to the floor to complete the removal of the spray needle 1.

[0040] To reduce the installation difficulty of the large impact jet nozzle 1, the primary goal is to reduce the weight of the installation tool, ensure simple installation, and ensure that the tool design does not affect the performance of the product itself. The present invention provides an annular groove 11 on the non-flow path surface of the nozzle 1, turning the nozzle 1 itself into a support ring, thereby replacing the support structure of traditional disassembly tools. The convenient nozzle disassembly and assembly method of this embodiment includes the following steps: 1. If Figure 3 As shown, an annular groove 11 for tool installation is designed on the nozzle needle 1. The width of the annular groove 11 is not less than 6 mm, the depth is not less than 10 mm, and the distance between the annular groove 11 and the high-speed flow surface of the nozzle needle 1 is not less than 9 mm. The annular groove 11 is processed on the nozzle needle 1 according to this design.

[0041] 2. If Figure 1 and Figure 2 As shown, prepare at least one clamping plate 2, which must be provided with a hanging hole 21; at least one connecting bolt 3; at least one tightening nut 4; and a positioning ring 5, which is provided with two hanging points 51 and a weight-reducing groove 52. The number of mounting clamps can be freely adjusted according to the weight of the spray needle 1. Figure 1 and Figure 2 As shown, there are three clamping plates 2, three connecting bolts 3 and three tightening nuts 4.

[0042] 3. If Figure 4As shown, a hand chain hoist 8 is prepared and installed on the upper side of the spray needle 1.

[0043] 4. Use Figure 2 Insert the middle clamping plate 2 into the annular groove 11 of the spray needle 1, and fix the clamping plate 2 to the positioning ring 5 with the connecting bolt 3 and the tightening nut 4. Tighten the tightening nut 4 according to the preload requirement to ensure that the tool is firmly connected.

[0044] 5. Install a lifting shackle on the lifting hole 21 of the clamping plate 2, and connect the shackle to the hand hoist 8 with a steel wire.

[0045] 6. Remove all the connecting bolts 6 of the spray needle 1 symmetrically.

[0046] 7. Use the jacking bolt 7 to push out the spray needle 1, and use the hand hoist 8 to lift the spray needle 1 to the floor to complete the disassembly of the spray needle 1.

[0047] 8. Installation of the spray needle 1: First, repeat steps 2 to 5 above, then use the hand hoist 8 to lift the spray needle 1 to the installation location, and symmetrically tighten all the connecting bolts 6 of the spray needle 1 to complete the installation of the spray needle 1.

[0048] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A convenient needle disassembly and assembly tool, characterized by: The invention comprises a positioning ring (5), the positioning ring (5) is engaged with the spray needle (1), at least one clamping plate (2) is connected to the positioning ring (5), an annular groove (11) is provided on the non-flow channel surface of the spray needle (1), one end of the clamping plate (2) away from the positioning ring (5) is engaged in the annular groove (11), and a hanging hole (21) is provided on the clamping plate (2).

2. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: The clamping plate (2) and the positioning ring (5) are connected by connecting bolts and are locked by tightening nuts (4).

3. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: Two hanging points (51) are provided on the positioning ring (5).

4. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: A plurality of weight-reducing grooves (52) are provided on the positioning ring (5).

5. The convenient disassembly and assembly tool for a spray needle according to claim 1, characterized in that: The line connecting the hanging hole (21) and the center of gravity of the spray needle (1) is perpendicular to the axis of the spray needle (1).

6. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: The width of the annular groove (11) is not less than 6 mm, and the depth of the annular groove (11) is not less than 10 mm.

7. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: The distance between the annular groove (11) and the flow channel surface of the spray needle (1) is not less than 9 mm.

8. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: It also includes a hand chain hoist (8), and the wire rope of the hand chain hoist (8) is connected to the hanging hole (21) on the clamping plate (2).

9. The convenient needle disassembly and assembly tool according to claim 1, characterized in that: When removing the spray needle (1), install the jacking bolt (7) for ejecting the spray needle (1) on the connecting flange (91) on the spray needle shaft (9).

10. A method for conveniently disassembling a spray needle, using the conveniently disassembling tool for a spray needle according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Install the bent end of the clamping plate (2) into the ring groove (11) of the spray needle (1), and fix the other end of the clamping plate (2) to the positioning ring (5) with the connecting bolt (3) and the tightening nut (4); S2: Install a lifting shackle on the lifting hole (21) of the clamping plate (2), and connect the lifting shackle to the hand chain hoist (8) with a steel wire; S3: When disassembling the spray needle (1): symmetrically remove all the connecting bolts (6) on the spray needle (1), use the lifting bolts (7) to push out the spray needle (1), and use the hand chain hoist (8) to lift the spray needle (1) to the floor to complete the disassembly of the spray needle (1); When installing the spray needle (1): Use the hand chain hoist (8) to lift the spray needle (1) to the installation location, and tighten all the spray needle (1) connecting bolts (6) symmetrically to complete the installation of the spray needle (1).

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