Lifting tool for spray needle head of large impact type water wheel

Abstract

The utility model relates to the field of impact water turbines, and discloses a lifting tool for a spray needle head of a large impact water turbine. When the spray needle head is horizontally processed or vertically assembled, the clamp is assembled at the straight section part of the spray needle head and is tightened by using the bolt and the nut I, so that the clamp and the spray needle head are completely held tightly, the lifting ring is arranged on the side surface of the clamp, and the lifting rod is axially arranged on the clamp and is tightened by using the nut II. According to the lifting tool for the spray needle head, the shackles are used on the lifting ring and the lifting rod, and the lifting belt is connected with the lifting hook, so that the spray needle head can be lifted horizontally or vertically. The lifting tool has the technical characteristics of strong practicability, high efficiency and low cost, and can ensure that the finish machining surface is not damaged in the lifting process especially for the spray needle head of the large impulse turbine, so that the product quality of a workpiece is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece hoisting of hydro-generator sets, specifically a large impact-type hydro-turbine nozzle hoisting tool. Background Technology

[0002] The nozzle head in a large impact turbine is a key component. The nozzle head has a conical structure with a short straight section at the rear. High surface precision is required for the nozzle head, with a surface finish of Ra0.8. It is primarily machined on a horizontal lathe, but requires vertical assembly. Previously, due to its small size and light weight, the nozzle head was simply secured to its surface with slings during machining and assembly, with the operator assisting manually. However, with the development of large impact turbines, the size and weight of the nozzle head have increased, now reaching several hundred kilograms. The traditional lifting methods are no longer sufficient to meet the requirements for lifting large nozzle heads, and the lifting process is extremely dangerous, easily damaging the workpiece or injuring the operator. Therefore, researching a lifting tool for large impact turbine nozzle heads to solve this problem is of great significance. Summary of the Invention

[0003] In view of this, this utility model provides a lifting tool for large impact turbine nozzles based on the structural characteristics and lifting requirements of impact turbine nozzles. This solves the problem of the previous method of directly binding the nozzles with slings and having the operator cooperate in lifting, thus avoiding the problems of easy slippage, injury to personnel, and damage to the workpiece during the lifting process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lifting tool for a large impact-type water turbine nozzle, wherein the inner wall of the clamp is installed on the outer circumference of the nozzle, and the clamp is tightened at the joint surface using bolts and nuts I to completely grip the nozzle; the lifting ring is tightened in the screw hole on the side of the clamp; and the lifting rod passes through the axial hole of the clamp and is tightened using nuts II. A shackle and a sling pass through the lifting ring and the lifting rod, and the sling is connected to a hook.

[0005] As a further embodiment of this utility model: the clamp has a two-part structure, with rubber glued inside the clamp, and screw holes for connecting the lifting ring and the lifting rod are machined radially and axially on the clamp.

[0006] As a further embodiment of this utility model: the clamp is assembled on the outer circle of the nozzle head, and the clamp joint is designed with a gap, and is tightened with bolts and nuts I.

[0007] As a further embodiment of this utility model: the lifting ring is tightened with the radial screw hole of the clamp, and the lifting rod is tightened with the axial screw hole of the clamp using nut II.

[0008] As a further embodiment of this utility model: the sling passes through the lifting ring or the lifting rod according to the lifting method of the nozzle head, and the sling is connected to the hook after the length is adjusted.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. A lifting tool for large impact turbine nozzles uses a clamp with radial screw holes to engage the lifting ring and axial holes to engage the lifting rod and nut II. By using the lifting ring and lifting rod simultaneously for lifting, the nozzle can be horizontally installed, reducing the danger during horizontal installation and improving operational safety.

[0011] 2. The lifting tool for large impact turbine nozzles uses a clamp to axially connect the lifting rod and nut II, and the lifting rod is used for lifting. This allows for the vertical installation of the nozzles, reducing the danger during the vertical installation process and improving operational safety. Attached Figure Description

[0012] Figure 1 This is a left view of the horizontal lifting structure of this utility model;

[0013] Figure 2 This is a right view of the horizontal lifting structure of this utility model;

[0014] Figure 3 This is a top view of the horizontal lifting structure of this utility model;

[0015] Figure 4 This is a left view of the vertical hoisting structure of this utility model;

[0016] Figure 5 This is a right view of the vertical hoisting structure of this utility model;

[0017] Figure 6 This is a top view of the vertical hoisting structure of this utility model;

[0018] Components labeled in the diagram: 1. Clamp; 2. Spray nozzle; 3. Bolt; 4. Nut I; 5. Shackle; 6. Lifting rod; 7. Nut II; 8. Lifting strap; 9. Lifting hook; 10. Rubber sheet; 11. Lifting ring. Detailed Implementation

[0019] To make the technical solution and beneficial effects of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the following embodiments are some, but not all, embodiments of this utility model. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without any creative effort are all within the protection scope of this utility model.

[0020] like Figure 1-6 As shown, this utility model discloses a lifting tool for an impact turbine nozzle, including a clamp 1, which has a two-part structure. A rubber sheet 10 is glued inside the clamp 1. The clamp 1 has a screw hole for connecting a lifting ring 11 in the radial direction and a clamping hole for connecting a lifting rod 6 in the axial direction. When lifting the nozzle 2, the clamp 1 and the nozzle 2 are completely clamped together. The lifting ring 11 is tightened in the screw hole on the side of the clamp 1. The lifting rod 6 passes through the axial hole of the clamp 1 and is tightened with a nut II7. The lifting ring 11 and the lifting rod 6 are connected to a sling 8 through a shackle 5. The sling 8 is connected to a hook 9.

[0021] Working principle: With the nozzle head in a horizontal position, rubber 10 is bonded to the inside of the two clamps 1. The inner walls of the two clamps 1 with rubber 10 are then installed on the straight section of the outer circle of the nozzle head 2. Bolts 3 and nuts I4 are used to tighten the joint surface of the clamps 1. A 3mm gap is designed at the joint surface of the clamps 1 to ensure that the clamps 1 and the nozzle head 2 are completely clamped together. Two lifting rings 11 are installed on the radial screw holes on both sides of the clamps 1 and tightened. The two lifting rods 6 are engaged with the axial holes on both sides of the clamps 1 and tightened with nuts II7. Two shackles 5 are used to connect the two lifting rings 11 to the lifting straps 8. Two shackles 5 are used to connect the two lifting rods 6 to the lifting straps 8. The length of the lifting straps 8 is adjusted and connected to the hooks 9. The nozzle head is horizontally suspended through the four lifting points.

[0022] With the nozzle head in its upright position, rubber 10 is glued to the inside of the two clamps 1. The inner walls of the two clamps 1 with rubber 10 are then installed on the straight section of the outer circle of the nozzle head 2. Bolts 3 and nuts I4 are used to tighten the joint surface of the clamps 1. A 3mm gap is designed at the joint surface of the clamps 1 to ensure that the clamps 1 and the nozzle head 2 are completely clamped together. The two axial holes on both sides of the clamps 1 are engaged with the two lifting rods 6 and tightened with nuts II7. The two lifting rods 6 are connected to the lifting straps 8 using two shackles 5. The length of the lifting straps 8 is adjusted and connected to the hooks 9. The nozzle head is then vertically hoisted through the two lifting points.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this utility model is defined by the claims and their equivalents.

Claims

1. A large-scale impulse water wheel injection needle head lifting tool, comprising a clamp (1), a lifting rod (6), and a lifting ring (11), characterized in that: The inner wall of the clamp (1) is installed at the outer circle of the spray needle head (2), the joint surface of the clamp (1) is fastened by using the bolt (3) and the nut I (4), the clamp (1) is tightly held with the spray needle head (2); the lifting ring (11) is screwed at the side hole of the clamp (1), the lifting rod (6) passes through the axial hole of the clamp (1) and is fastened by using the nut II (7), the lifting ring (11) is connected with the lifting rod (6) through the shackle (5) and the lifting belt (8), the lifting belt (8) is connected with the lifting hook (9).

2. A large-scale impeller water wheel injection needle head lifting tool according to claim 1, characterized in that: The clamp (1) is a two-part structure, the rubber (10) is bonded in the clamp (1), the clamp (1) is radially processed with the screw hole for connecting the lifting ring (11), the clamp (1) is axially processed with the joint hole for connecting the lifting rod (6).

3. A large-scale impeller water wheel injection needle head lifting tool according to claim 2, characterized in that: The clamp (1) is assembled at the outer circle of the spray needle head (2), the joint of the clamp (1) has a gap, and is fastened by using the bolt (3) and the nut I (4).

4. A large-scale impeller water wheel injection needle head lifting tool according to claim 3, characterized in that: The lifting ring (11) is screwed with the radial screw hole of the clamp (1), the lifting rod (6) is jointed with the axial hole of the clamp (1) and is fastened by using the nut II (7).

5. A large scale pelton jet needle hoisting tool according to claim 4, characterized in that: The lifting belt (8) passes through the lifting ring (11) or the lifting rod (6) according to the lifting mode of the spray needle head (2); the lifting belt (8) is connected with the lifting hook (9) after adjusting the length.

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