Tool for replacing shear pin of water guide mechanism of water turbine

Abstract

A tool for replacing a shear pin of a water guide mechanism of a water turbine comprises a bottom plate, sliding grooves are formed in the two sides of the bottom plate respectively, sliding blocks are arranged in the sliding grooves, positioning blocks are arranged on the sliding blocks, and the positioning blocks are used for being matched with original bolts on the water guide mechanism to achieve installation and fixation of the tool. A lifting plate is arranged on the bottom plate, a hydraulic cylinder bearing plate capable of horizontally moving is arranged on one side of the lifting plate, two hydraulic cylinders are arranged on the hydraulic cylinder bearing plate, push rods of the two hydraulic cylinders are oppositely arranged, clamping blocks are arranged on the push rods, and the two clamping blocks make contact with each other and clamp the auxiliary crank arm. By the adoption of the structure, the auxiliary crank arm can be effectively jacked, shear pin mounting holes of the main crank arm and the auxiliary crank arm can be conveniently and rapidly aligned, and the problems that in the prior art, a jack is difficult to fix and fails are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydropower station equipment, in particular to a water turbine water guide mechanism shear pin replacement frock. BACKGROUND

[0002] The water turbine shear pin is installed on the main and auxiliary crank arms of the water guide mechanism transmission device, is a power transmission and safety device, and is used for ensuring the safety of the unit. Figure 4 When foreign matters exist between the movable guide vanes or the movable guide vanes are stuck due to other reasons, the shear pin is sheared to enable the main crank arm to rotate along with the control ring, so that the remaining movable guide vanes can be normally closed and the safety of the unit is ensured.

[0003] Since the main and auxiliary crank arms will be relatively displaced after being broken, the shear pin mounting holes on the two crank arms will be misaligned, so that the shear pin mounting holes on the main and auxiliary crank arms need to be vertically and accurately aligned when the shear pin is replaced, and the main crank arm needs to be rotated during alignment.

[0004] However, in the current jack erection process, it is difficult to determine the support points near some auxiliary crank arms due to the arrangement mode. SUMMARY

[0005] The utility model provides a water turbine water guide mechanism shear pin replacement frock, can effectively to the auxiliary crank arm is pressed tightly, is convenient for the quick alignment of the shear pin mounting holes of the main and auxiliary crank arms, and solves the problems of jack fixing difficulty and jack failure in the prior art.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of a water turbine water guide mechanism shear pin replacement frock, which comprises a bottom plate, one slide groove is arranged on each side of the bottom plate, a sliding block is arranged in the slide groove, a positioning block is arranged on the sliding block, and the positioning block is used for cooperating with the original bolt on the water guide mechanism to realize the installation and fixing of the frock.

[0007] A lifting plate is arranged on the bottom plate, the lifting plate is provided with a hydraulic cylinder support plate capable of moving horizontally, two hydraulic cylinders are arranged on the hydraulic cylinder support plate, the push rods of the two hydraulic cylinders are oppositely arranged, clamping blocks are arranged on the push rods, and the two clamping blocks contact and clamp the auxiliary crank arm.

[0008] In the preferred solution, the sliding block is provided with two horizontal guide rods at two ends, the ends of the two horizontal guide rods pass through the ends of the sliding groove and extend to outside of the bottom plate, a spring is sleeved on the horizontal guide rod in the sliding groove.

[0009] In the preferred solution, the middle part of the positioning block is provided with a circular hole, a limiting ring groove is arranged on the side wall of the circular hole, the positioning block is a cylindrical block body, and a limiting convex ring is arranged on the outer wall of the positioning block and located in the limiting ring groove.

[0010] The bottom surface of the positioning block is provided with a nut buckle groove, and the nut buckle groove comprises a section of a regular hexagonal groove body and a section of a cylindrical groove body.

[0011] In the preferred solution, the bottom plate is further provided with a lead screw and a vertical guide rod, the lead screw and the vertical guide rod are arranged through the lifting plate, and the lead screw is threadedly connected with the lifting plate.

[0012] The upper end of the lead screw is provided with a lead screw control handle, and the lower end of the lead screw is movably connected with the bottom plate.

[0013] In the preferred solution, one side of the hydraulic cylinder supporting plate is provided with a plug rod, one side of the lifting plate is provided with a plug hole, the plug rod is inserted into the plug hole, and the horizontal movement of the hydraulic cylinder supporting plate relative to the lifting plate is realized.

[0014] The water turbine guide mechanism shear pin replacement tool provided by the utility model has the following beneficial effects by adopting the above structure:

[0015] (1) The two sliding blocks and the positioning blocks thereon cooperate with the original nuts on the guide mechanism to fix the tool, so that the stability during tool operation is ensured, and the device can be stably installed in place according to the positions of the nuts;

[0016] (2) The hydraulic cylinder capable of lifting and horizontally moving can effectively clamp the vice crank arm of different heights and positions according to different operation scenes;

[0017] (3) Compared with the traditional jack fixing method, the horizontally arranged hydraulic cylinder directly acts on the vice crank arm, avoids the unstable factors caused by oblique fixing, and significantly enhances the overall stability of the replacement system. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings and embodiments:

[0019] Figure 1 It is the whole structure schematic diagram of the utility model.

[0020] Figure 2 It is the structure schematic diagram of the sliding block and the positioning block in the utility model.

[0021] Figure 3 It is the bottom surface structure schematic view of the positioning block in the utility model.

[0022] Figure 4 It is the main and vice elbow arm structure diagram in the prior art.

[0023] In the drawing: base plate 1, sliding groove 2, sliding block 3, round hole 301, limiting ring groove 302, horizontal guide rod 4, spring 5, lifting plate 7, lead screw 8, lead screw control handle 801, vertical guide rod 9, hydraulic cylinder bearing plate 10, hydraulic cylinder 11, clamping block 12, plug rod 13, positioning block 14, limiting convex ring 141, nut buckle groove 142. DETAILED DESCRIPTION

[0024] As Figures 1-3 In the utility model, a water turbine guide vane shearing pin replacement tool includes a base plate 1, one way sliding groove 2 is arranged on the both sides of the base plate 1, the sliding groove 2 is provided with a sliding block 3, the sliding block 3 is provided with a positioning block 14, the positioning block 14 is used for cooperating with the original bolt on the guide vane to realize the installation and fixation of the tool.

[0025] The base plate 1 is provided with a lifting plate 7, the lifting plate 7 is provided with a hydraulic cylinder bearing plate 10 capable of moving horizontally, the hydraulic cylinder bearing plate 10 is provided with two hydraulic cylinders 11, the push rods of the two hydraulic cylinders 11 are oppositely arranged, the push rod is provided with a clamping block 12, and the two clamping blocks 12 contact and clamp the vice elbow arm.

[0026] In the preferred scheme, the two ends of the sliding block 3 are provided with two horizontal guide rods 4, the two horizontal guide rods 4 pass through the end of the sliding groove 2 and extend to the outside of the base plate 1, and the horizontal guide rod 4 in the sliding groove 2 is provided with a spring 5.

[0027] In the preferred scheme, the positioning block 14 is provided with a round hole 301 in the middle, the side wall of the round hole 301 is provided with a limiting ring groove 302, the positioning block 14 is a cylindrical block, the outer wall of the positioning block 14 is provided with a limiting convex ring 141, and the limiting convex ring 141 is located in the limiting ring groove 302.

[0028] The bottom surface of the positioning block 14 is provided with a nut buckle groove 142, and the nut buckle groove 142 includes a section of regular hexagonal groove body and a section of cylindrical groove body.

[0029] In the preferred scheme, the base plate 1 is further provided with a lead screw 8 and a vertical guide rod 9, the lead screw 8 and the vertical guide rod 9 are arranged through the lifting plate 7, and the lead screw 8 is threadedly connected with the lifting plate 7.

[0030] The upper end of the lead screw 8 is provided with a lead screw control handle 801, and the lower end of the lead screw 8 is movably connected with the base plate 1.

[0031] In the preferred solution, the hydraulic cylinder bearing plate 10 is provided with a plug rod 13 on one side, and the lifting plate 7 is provided with a plug hole on one side, the plug rod 13 is inserted into the plug hole and realizes the horizontal movement of the hydraulic cylinder bearing plate 10 relative to the lifting plate 7.

[0032] In the preferred solution, the clamping block 12 is movably arranged on the end of the push rod, so as to ensure that the clamping block 12 can be clamped and fixed at different positions of the secondary crank arm.

[0033] The water turbine guide vane shear pin replacement tool disclosed in the present application is installed in the following way:

[0034] The tool is installed on the guide vane, and the nuts in the nut buckle groove 142 on the bottom surface of the positioning block 14 are buckled with the upper end of the original bolt nut on the guide vane, so as to realize the preliminary installation and positioning of the tool.

[0035] Then, according to the actual needs, the height of the lifting plate 7 is adjusted by rotating the screw control handle 801, so that the lifting plate 7 moves vertically to the same horizontal height as the secondary crank arm.

[0036] The hydraulic cylinder bearing plate 10 is moved horizontally outwards, and the clamping blocks 12 are close to and located on both sides of the end of the secondary crank arm, and then the hydraulic cylinder 11 is started, so that the two clamping blocks 12 can effectively clamp and fix the secondary crank arm.

[0037] Then, the operator operates the rotation of the primary crank arm, so that the primary crank arm rotates relative to the secondary crank arm and the shear pin mounting holes on the two crank arms move relative to each other to be completely aligned.

[0038] After that, the old shear pin is removed and the new shear pin is installed.

[0039] After the installation of the new shear pin is completed, the hydraulic cylinder 11 is unloaded, and then the hydraulic cylinder bearing plate 10 moves towards the lifting plate 7 and is retracted, the lifting plate 7 is lowered to the initial position by adjusting the screw control handle 801, and finally the tool is lifted and removed from the guide vane.

[0040] In the above way, the effective clamping and fixing of the secondary crank arm are ensured, and the shear pin in the water turbine guide vane is efficiently and safely replaced.

Claims

1. A tooling for replacing the shear pin of a water turbine guide vane mechanism, comprising a base plate (1), characterized in that: The base plate (1) has a sliding groove (2) on each side, a slider (3) is provided in the sliding groove (2), and a positioning block (14) is provided on the slider (3). The positioning block (14) is used to cooperate with the original bolt on the water guiding mechanism to realize the installation and fixation of the tooling. The base plate (1) is provided with a lifting plate (7), and a hydraulic cylinder support plate (10) that can move horizontally is provided on one side of the lifting plate (7). Two hydraulic cylinders (11) are provided on the hydraulic cylinder support plate (10). The push rods of the two hydraulic cylinders (11) are arranged opposite to each other, and the push rods are provided with clamping blocks (12). The two clamping blocks (12) contact and clamp the auxiliary crank arm.

2. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 1, characterized in that: The slider (3) has two horizontal guide rods (4) at both ends. The ends of the two horizontal guide rods (4) pass through the end of the slide groove (2) and extend to the outside of the bottom plate (1). A spring (5) is sleeved on the horizontal guide rod (4) located in the slide groove (2).

3. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 1, characterized in that: The positioning block (14) has a circular hole (301) in the middle, and a limiting ring groove (302) is provided on the side wall of the circular hole (301). The positioning block (14) is a cylindrical block, and a limiting protrusion (141) is provided on the outer wall of the positioning block (14). The limiting protrusion (141) is located in the limiting ring groove (302).

4. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 3, characterized in that: The bottom surface of the positioning block (14) is provided with a nut groove (142), which includes a regular hexagonal groove and a cylindrical groove.

5. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 1, characterized in that: The base plate (1) is also provided with a lead screw (8) and a vertical guide rod (9). The lead screw (8) and the vertical guide rod (9) both pass through the lifting plate (7), and the lead screw (8) and the lifting plate (7) are threaded together. The upper end of the lead screw (8) is provided with a lead screw control lever (801), and the lower end of the lead screw (8) is movably connected to the base plate (1).

6. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 1, characterized in that: The hydraulic cylinder bearing plate (10) has a plug rod (13) on one side and a hole on one side of the lifting plate (7). The plug rod (13) is inserted into the hole and realizes the horizontal movement of the hydraulic cylinder bearing plate (10) relative to the lifting plate (7).

7. The tooling for replacing the shear pin of a water turbine guide vane mechanism according to claim 1, characterized in that: The clamp (12) is movably mounted on the end of the push rod.

Images