Spray needle head hoisting tool

Abstract

The utility model discloses a spray needle head hoisting tool, and belongs to the field of hoisting tools. The device mainly comprises a bearing assembly, wherein the bearing assembly comprises a ball bearing for supporting the tip of a spray needle head; and the holding assembly is installed on the ball bearing, the holding assembly comprises a first steel ring and a second steel ring which are used for holding the spray needle head and hinged to each other, and lifting lugs connected with an external lifting tool are arranged on the first steel ring and the second steel ring. According to the spray needle head hoisting tool, the holding assembly is opened in a C shape through a hinge structure of the first steel ring and the second steel ring, the periphery of the spray needle head is directly sleeved with the steel rings from the side face under the condition that a rotating wheel is not dismantled, meanwhile, a ball bearing of the bearing assembly is connected to the tip end of the spray needle head in a sleeving mode, and a double-positioning structure of tip end supporting and periphery holding is formed; and therefore, the spray needle head can be stably hoisted.

Description

Technical Field

[0001] This utility model relates to the field of lifting tools, and in particular to a nozzle lifting tool. Background Technology

[0002] In the field of modern hydropower, impulse turbine units are widely used in many hydropower projects due to their high energy conversion efficiency. As one of the key components of an impulse turbine unit, the nozzle head requires regular inspection and replacement during long-term operation due to factors such as high-speed water flow impact and wear.

[0003] Due to the smooth surface and large mass of the nozzle, in past maintenance practices, workers have mostly used general hoisting equipment or temporary, simple hoisting devices to carry out the disassembly and assembly of the nozzle.

[0004] General-purpose lifting equipment, lacking optimization for the unique structure and physical characteristics of the nozzle, struggles to achieve stable and precise gripping and positioning of the nozzle during actual operation. Due to the smooth surface of the nozzle and the absence of effective anti-slip and limiting measures, it is highly susceptible to wobbling, shifting, or even slipping during lifting, moving, and installation. This poses a significant threat to the safety of on-site maintenance personnel, and if the nozzle falls, it could also cause impact damage to other components of the unit, thereby affecting the normal operation and service life of the entire turbine unit. Therefore, it is necessary to design nozzle lifting tools.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This utility model provides a nozzle lifting tool to solve the problem that general lifting equipment is not adapted to the smooth and heavy characteristics of nozzles, resulting in unstable gripping and positioning, easy shaking and slippage during lifting, which threatens personnel safety and may damage unit components.

[0007] The present invention adopts the following technical solution: a nozzle lifting tool. It mainly includes: a support assembly, which includes a ball bearing for supporting the tip of the nozzle; and a holding assembly, which is mounted on the ball bearing and includes a first steel ring and a second steel ring that hold the nozzle and are hinged to each other. Both the first and second steel rings are provided with lifting lugs for connecting to external lifting tools.

[0008] Furthermore, both the first steel ring and the second steel ring have through grooves on their sides. The first steel ring has a fastening part at the end away from the hinge point with the second steel ring, and a notch is formed at the end away from the hinge point with the second steel ring. Fasteners are inserted into the second steel ring.

[0009] Furthermore, both the first and second steel rings have axial rollers rotatably arranged in their through grooves. The second steel ring has two sets of axial rollers rotatably arranged in its through groove, and the first steel ring has one set of axial rollers rotatably arranged in its through groove. The three sets of axial rollers are distributed at equal intervals.

[0010] Furthermore, the second steel ring is provided with two sets of radial rollers, each consisting of a bracket and rollers rotatably mounted on the bracket, with the two sets of radial rollers positioned near both ends of the second steel ring.

[0011] Furthermore, a locking assembly is connected between the first steel ring and the second steel ring. The locking assembly includes a fixed seat installed on the first steel ring near one end. The fixed seat has a protrusion, a rotating part is rotatably installed on the protrusion, and a hanging part is rotatably installed on the rotating part. One end of the second steel ring is equipped with a docking part adapted to the hanging part. The docking part has a hook part for hooking the hanging part.

[0012] Furthermore, the hanging part has a U-shaped structure.

[0013] Furthermore, a gripping part is installed on one end of the rotating part away from the connection with the protrusion.

[0014] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0015] The nozzle lifting tool utilizes the hinged structure of the first and second steel rings to open the holding assembly in a "C" shape. Without removing the rotating wheel, the steel ring is directly fitted onto the outer circumference of the nozzle from the side. At the same time, the ball bearing supporting the assembly is fitted onto the tip of the nozzle, forming a dual positioning structure of "tip support + outer circumference holding". The rolling characteristics of the ball bearing allow the nozzle to rotate flexibly during lifting, avoiding jamming, enhancing the structural strength of the connection, and ensuring safety and stability during lifting. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 This is an overall schematic diagram of the nozzle lifting tool in this application;

[0019] Figure 2 for Figure 1 A diagram showing the disassembly process;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0021] Figure label:

[0022] 1. Supporting component; 11. Ball bearing; 12. Steel spoke; 2. Holding component; 21. First steel ring; 22. Second steel ring; 23. Axial roller; 24. Radial roller; 25. Lifting lug; 26. Support component; 27. Fastening part; 28. Notch / groove; 3. Locking component; 31. Fixing seat; 32. Protrusion; 33. Rotating part; 34. Grip part; 35. Hanging part; 36. Connecting part. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1 to 3 As shown, this utility model embodiment provides a nozzle lifting tool, which mainly includes a support component 1, a holding component 2, and a locking component 3;

[0026] The support assembly 1 includes a ball bearing 11, which is sleeved on and supports the tip of the nozzle, and three sets of steel spokes 12 are fixedly installed in the circumferential direction of the ball bearing 11.

[0027] The holding assembly 2 includes a first steel ring 21 connected to one end of three sets of steel spokes 12. A second steel ring 22 is hinged to one end of the first steel ring 21. Both the first steel ring 21 and the second steel ring 22 have through grooves on their sides (not shown in the figure). The first steel ring 21 has a fastening part 27 at the end away from the hinge point with the second steel ring 22. The fastening part 27 is adapted to extend into the through groove of the second steel ring 22 when the second steel ring 22 rotates along the hinge point with the first steel ring 21 to mate and fit with one end of the first steel ring 21.

[0028] Meanwhile, a notch 28 is provided on the first steel ring 21 at the end away from the hinge point with the second steel ring 22. The notch 28 is adapted to be able to engage the end of the second steel ring 22 away from the hinge point with the first steel ring 21 in the notch 28 when the second steel ring 22 rotates along the hinge point with the first steel ring 21, so that the first steel ring 21 and the second steel ring 22 form a ring structure to hold the nozzle.

[0029] Furthermore, lifting lugs 25 are installed on the side of the ball bearing 11 and the side of the first steel ring 21. Meanwhile, a support member 26 is fixedly installed on the side of the first steel ring 21. One set of lifting lugs 25 is fixedly connected to the first steel ring 21 through the support member 26. The lifting lugs 25 are suitable for connection with external lifting tools for lifting the nozzle.

[0030] In this application, a fastener, which can be a bolt, is inserted into the second steel ring 22 so that when the first steel ring 21 and the second steel ring 22 are mated to form a ring structure, the fastener is suitable for threaded connection through the second steel ring 22 and the fastening part 27.

[0031] Efficient and safe hoisting operations are achieved through the coordinated operation of the supporting component 1, the holding component 2, and the locking component 3. The specific working principle is as follows:

[0032] During installation, utilizing the hinged structure of the first steel ring 21 and the second steel ring 22, the holding assembly 2 is opened in a "C" shape. Without removing the rotating wheel, the steel ring is directly fitted onto the outer circumference of the nozzle from the side. The second steel ring 22 is pushed to rotate around the hinge until it aligns with the first steel ring 21. At this point, the fastening part 27 of the first steel ring 21 is embedded in the through groove of the second steel ring 22, while the free end of the second steel ring 22 is engaged in the notch 28 of the first steel ring 21, forming a complete ring that tightly holds the nozzle. It is then secured with fasteners to ensure the connection strength after the steel ring is closed and to prevent loosening during hoisting.

[0033] The ball bearing 11 of the supporting component 1 is sleeved on the tip of the nozzle and connected to the first steel ring 21 of the holding component 2 through three sets of circumferentially distributed steel spokes 12, forming a dual positioning structure of "tip support + peripheral holding": the rolling characteristics of the ball bearing 11 allow the nozzle to rotate flexibly during hoisting, avoiding jamming, while the steel spokes 12 evenly transmit the tip support force to the steel ring, improving the overall stability.

[0034] During hoisting, the lifting lugs 25 on the side of the ball bearing 11 and the first steel ring 21 bear the lifting load. One set of lifting lugs 25 is fixedly connected to the first steel ring 21 through the support member 26, enhancing the structural strength of the connection and ensuring safety and stability during hoisting. During disassembly, the locking component 3 is operated in reverse to unlock the steel ring, restoring it to its "C" shape before it can be directly removed from the outer periphery of the nozzle, without disassembling surrounding components, effectively shortening maintenance time and reducing the work area. Through the coordinated operation of its components, the entire tool system achieves stable gripping, flexible rotation, and safe hoisting of smooth, large nozzles, significantly improving maintenance efficiency and operational safety.

[0035] In one specific embodiment, refer to Figures 1 to 2 As shown, horizontally arranged axial rollers 23 are rotatably arranged in the through grooves of the first steel ring 21 and the second steel ring 22. The second steel ring 22 has two sets of axial rollers 23 rotatably arranged in the through groove, and the first steel ring 21 has one set of axial rollers 23 rotatably arranged in the through groove. The three sets of axial rollers 23 are evenly distributed. The axial rollers 23 can flexibly rotate the needle during the installation or removal of the nozzle.

[0036] During the installation or removal of the nozzle, when the lifting tool grips the outer circumference of the nozzle via the holding assembly 2 (first steel ring 21 and second steel ring 22), all three sets of axial rollers 23 (two sets inside the second steel ring 22 and one set inside the first steel ring 21, evenly spaced) are in contact with the nozzle surface. Since the axial rollers 23 are horizontally rotatable within the through grooves of the steel rings, when the nozzle needs to adjust its angle or position, its axial movement or rotation will cause the rollers to roll synchronously. At this time, the sliding friction between the nozzle and the rollers is converted into rolling friction, significantly reducing contact resistance and allowing the nozzle to rotate flexibly within the lifting tool, avoiding jamming caused by rigid contact.

[0037] In another specific embodiment, refer to Figure 2 As shown, two sets of radial rollers 24 are provided on the second steel ring 22. The radial rollers 24 consist of a bracket and rollers rotatably mounted on the bracket. The two sets of radial rollers 24 are located on the second steel ring 22 near both ends. The radial rollers 24 can play a locking function during the lifting out or lifting in of the nozzle, preventing the nozzle from falling out of the lifting tool.

[0038] When the lifting tool closes and grips the nozzle head via the clamping assembly 2 (first steel ring 21 and second steel ring 22), the two sets of radial rollers 24 on the second steel ring 22 (located near both ends) contact the outer peripheral protrusions of the nozzle head (such as shoulders, limiting steps, etc.). The radial rollers 24 are fixed to the steel rings by brackets. The rollers can rotate around their own axes, but the mounting direction of their brackets is perpendicular to the axial direction (i.e., radial) of the nozzle head. Therefore, the rolling direction of the rollers restricts the radial displacement of the nozzle head.

[0039] During the lifting of the nozzle, when the nozzle tends to move radially outward (away from the center of the lifting tool) due to gravity or shaking, the surface of the radial roller 24 forms a mechanical obstruction with the protruding part of the nozzle, using the radial limiting effect of the roller to counteract the detachment force of the nozzle. At the same time, the rotational characteristics of the roller avoid jamming caused by rigid contact, allowing the nozzle to move normally in the axial direction (such as lifting or lowering). Conversely, during installation, the radial roller 24 prevents the nozzle from slipping outward due to alignment deviation or operational errors, ensuring that it remains within the effective holding range of the lifting tool.

[0040] In one specific embodiment, refer to Figures 2 to 3 As shown, a locking assembly 3 is connected between the first steel ring 21 and the second steel ring 22. The locking assembly 3 includes a fixed seat 31 fixedly installed on the first steel ring 21 near one end. The fixed seat 31 has a protrusion 32, and a rotating part 33 is rotatably installed on the protrusion 32. The rotating part 33 is adapted to rotate along the connection with the protrusion 32.

[0041] A gripping part 34 is fixedly installed on one end of the rotating part 33 away from the connection with the protrusion 32. The gripping part 34 is adapted to drive the rotating part 33 to rotate. A hanging part 35 is rotatably installed on the rotating part 33. The hanging part 35 is similar to a U-shaped structure. At the same time, a docking part 36 adapted to the hanging part 35 is fixedly installed on one end of the second steel ring 22. The docking part 36 has a hook portion for hooking the hanging part 35.

[0042] Once the first steel ring 21 and the second steel ring 22 are rotated to their mating positions, the operator uses the grip 34 to drive the rotating part 33 to rotate around the protrusion 32 of the fixed base 31. This aligns the U-shaped hook part 35 on the rotating part 33 with the mating part 36 (hook part) of the second steel ring 22. Continuing to rotate the grip 34 causes the hook part 35 to engage with the hook of the mating part 36, forming a hook lock. At this point, the rotating part 33 uses leverage to tighten the mating ends of the steel rings. The mechanical engagement of the hook part 35 and the mating part 36 counteracts the lifting tension, achieving self-locking. For disassembly, the grip 34 is reversed to disengage the hook part 35 from the hook, unlocking the steel ring. This structure achieves rapid hook locking and unlocking via handle rotation, amplifies the locking force using mechanical levers, is convenient to operate, and provides reliable locking. It can accommodate small gaps at the mating ends of the steel rings, ensuring the stability and safety of the steel ring connection during lifting.

[0043] In summary: When the nozzle head needs to be replaced, the operator first opens the first steel ring 21 and the second steel ring 22 of the holding assembly 2 in a "C" shape through the hinge structure. Utilizing the openable and closable characteristics of the steel rings, the steel rings are directly inserted into the outer circumference of the nozzle head from the side without removing the turbine runner. The second steel ring 22 is pushed to rotate around the hinge until it aligns with the first steel ring 21. At this point, the fastening part 27 is embedded in the through groove to form an axial limit, and the notch 28 engages with the free end of the steel ring to form a circumferential limit, so that the two are spliced ​​into a complete ring structure, tightly holding the nozzle head. Subsequently, fasteners (such as bolts) are threaded through the second steel ring 22 and the fastening part 27, or the hook structure of the locking assembly 3 is used to rigidly fix both ends of the steel ring, forming a mechanically locked ring holding force to ensure that the nozzle head will not slip off due to its smooth surface during hoisting.

[0044] At the same time, the ball bearing 11 of the supporting component 1 is synchronously sleeved on the tip of the nozzle, and connected to the first steel ring 21 through three sets of evenly distributed steel spokes 12, forming a dual positioning structure of "tip bearing support + outer steel ring holding"; the rolling characteristics of the ball bearing 11 allow the nozzle to rotate freely along the axis during hoisting, eliminating jamming caused by angular deviation; the steel spokes 12 evenly transmit the tip support force to the steel ring, avoiding structural deformation caused by single-point force and improving the overall anti-overturning stability.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A needle hanging tool, characterized by: include: Support assembly (1), which includes a ball bearing (11) for tip support of the nozzle tip. The holding assembly (2) is mounted on the ball bearing (11). The holding assembly (2) includes a first steel ring (21) and a second steel ring (22) that hold the nozzle and are hinged to each other. Both the first steel ring (21) and the second steel ring (22) are provided with lifting lugs (25) for connecting to external lifting tools.

2. The needle tip crimping tool of claim 1, wherein: Both the first steel ring (21) and the second steel ring (22) have through grooves on their sides. The first steel ring (21) has a fastening part (27) at one end away from the hinge point with the second steel ring (22). The first steel ring (21) has a notch (28) at one end away from the hinge point with the second steel ring (22). Fasteners are inserted into the second steel ring (22).

3. The needle tip crimping tool of claim 2, wherein: The first steel ring (21) and the second steel ring (22) are each provided with axial rollers (23) rotatably arranged in the through groove. The second steel ring (22) has two sets of axial rollers (23) rotatably arranged in the through groove. The first steel ring (21) has one set of axial rollers (23) rotatably arranged in the through groove. The three sets of axial rollers (23) are distributed at equal intervals.

4. The needle tip crimping tool of claim 3, wherein: The second steel ring (22) is provided with two sets of radial rollers (24). The radial rollers (24) are composed of a bracket and rollers rotatably mounted on the bracket. The two sets of radial rollers (24) are located on the second steel ring (22) near both ends.

5. The needle tip crimping tool of claim 4, wherein: A locking assembly (3) is connected between the first steel ring (21) and the second steel ring (22). The locking assembly (3) includes a fixed seat (31) installed on the first steel ring (21) near one end. The fixed seat (31) has a protrusion (32). A rotating part (33) is rotatably installed on the protrusion (32). A hanging part (35) is rotatably installed on the rotating part (33). A docking part (36) adapted to the hanging part (35) is installed at one end of the second steel ring (22). The docking part (36) has a hook for hooking the hanging part (35).

6. The needle tip crimping tool of claim 5, wherein: The hanging part (35) has a U-shaped structure.

7. The needle tip crimping tool of claim 6, wherein: A gripping part (34) is installed on one end of the rotating part (33) away from the connection with the protrusion (32).

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