Hydraulic pulling-out tool for shear pin of guide vane of water turbine

Abstract

The utility model provides a hydraulic pulling-out tool for a shear pin of a water turbine guide vane, which belongs to the technical field of water turbine maintenance equipment and comprises a hollow hydraulic jack and a bolt, and the threaded end of the bolt penetrates through the inside of a plunger of the hollow hydraulic jack and the inside of the shear pin from top to bottom. A blind hole for the shear pin and the check ring of the shear pin to penetrate upwards is formed in the bottom face of the base, a communicating hole for the bolt to penetrate is formed between the inner top face of the blind hole and the top face of the base, and the hollow hydraulic jack is installed on the top face of the base; the nut is in threaded connection with the threaded end of the bolt and used for limiting the shear pin from the bottom of the shear pin, and the nut penetrates through the pin hole in the crank arm. The hydraulic pulling-out tool is low in use risk, the working intensity is reduced, the centering performance is good when the bolt is installed in the shear pin in a penetrating mode and the shear pin in the pin hole is taken out through the bolt and the nut, and the shear pin is pulled out more easily.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water turbine maintenance equipment technical field, especially is involved in a kind of water turbine guide vane shear pin hydraulic pulling-out tool. BACKGROUND

[0002] Water turbine guide vane shear pin is an important safety protection device, its main effect is to play the role of fracture protection when guide vane appears abnormal stress, to avoid water turbine to be further damaged. Figure 1 As shown in the figure, the existing shear pin is interference fit on the mounting structure with the crank arm, and the inside is a hollow structure for wearing shear pin signaler, and the outer wall of the middle part is provided with an annular groove as a fracture point when abnormal stress occurs, to prevent shear pin from falling off from the pin hole on the crank arm, a stop ring with an outer diameter larger than the pin hole is designed at the top end of the shear pin, so when the shear pin is sheared from the middle, the upper half of the shear pin is clamped in the pin hole, and the fractured shear pin cannot be directly taken out from the top surface of the crank arm, but can be pulled out from the bottom to the top by the jack used by the staff on the bottom surface of the crank arm, the staff uses this method to take out the shear pin, the work risk coefficient is higher, and the work intensity is larger, and when the equipment runs for a long time, the crank arm will be deformed, the roundness of the pin hole cannot be guaranteed, and the difficulty of taking out the shear pin will be greater. CONTENT OF UTILITY MODEL

[0003] In view of the above problems, the utility model provides a kind of water turbine guide vane shear pin hydraulic pulling-out tool, including hollow hydraulic jack,

[0004] Bolt, the threaded end of the bolt passes through the inside of the hollow hydraulic jack and the inside of the shear pin from top to bottom;

[0005] Base, the bottom surface of the base is provided with a blind hole for the shear pin and its stop ring to pass upward, a communication hole for the bolt to pass through is provided between the inner top surface of the blind hole and the top surface of the base, and the hollow hydraulic jack is installed on the top surface of the base;

[0006] Nut, the nut is threadedly connected at the threaded end of the bolt, for limiting from the bottom of the shear pin, and the nut passes through the pin hole on the crank arm.

[0007] Further, it further includes hydraulic oil pump, and the oil line joint of hollow hydraulic jack is connected by oil pipe with hydraulic oil pump.

[0008] Further, the top surface of the base is provided with a plurality of arc-shaped limit plates distributed in a ring shape with the center line of the communication hole as the center, and the center lines of the plurality of arc-shaped limit plates are coaxial with the center line of the communication hole, and the plurality of arc-shaped limit plates are used for surrounding and limiting the hollow hydraulic jack.

[0009] Further, the arc-shaped limiting plate is externally provided with a limiting bolt, and the threaded part of the limiting bolt is in contact with the outer surface of the hollow hydraulic jack.

[0010] Further, the threaded end of the limiting bolt is connected with a contact block, and the contact block is in contact with the outer surface of the hollow hydraulic jack.

[0011] Further, the base is in a cylindrical shape, and the bottom end of the base is provided with a groove, and the groove is in communication with the inner side wall of the blind hole and the outer side wall of the base.

[0012] Further, the blind hole is coaxial with the communication hole.

[0013] Further, the blind hole is coaxial with the shear pin.

[0014] Further, the T-shaped sleeve is arranged in the shear pin, and the outer side wall of the lower segment of the T-shaped sleeve is in gap contact with the inner side wall of the shear pin, and the T-shaped sleeve is sleeved on the rod part of the bolt, and the inner side wall of the T-shaped sleeve is in gap contact with the outer side wall of the rod part of the bolt.

[0015] Further, the top and bottom of the bolt are sleeved with washers, the outer diameter of the washer on the top of the bolt is greater than the inner diameter of the top end of the plunger, and the outer diameter of the washer on the bottom of the bolt is greater than the inner diameter of the shear pin and smaller than the inner diameter of the pin hole.

[0016] Beneficial effects:

[0017] The hydraulic pulling tool is used for pulling up the shear pin when the shear pin is broken in the elbow pin hole, the base of the hydraulic pulling tool is arranged on the top surface of the elbow and covers the outer side wall of the top end of the shear pin, the hollow hydraulic jack is arranged on the top surface of the base, the threaded end of the bolt is sequentially arranged in the plunger of the hollow hydraulic jack, the communication hole of the base and the blind hole of the shear pin from top to bottom, and after the nut is arranged on the bottom end of the bolt and locked, the hollow hydraulic jack can be started to push the head of the bolt upward, so that the bolt and the nut arranged on the bottom of the bolt drive the shear pin to move upward in the pin hole of the elbow, until the shear pin is pulled up, compared with the risk of the shear pin flying upward, the risk of the hydraulic pulling tool is low, the working strength is reduced, the neutralization is good when the bolt is arranged in the shear pin, the bolt and the nut are used to pull out the shear pin in the pin hole, and the shear pin is more easily pulled out.

[0018] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described in the following are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a schematic view of the mounting structure of the existing shear pin on the crank arm.

[0021] Figure 2 It is a schematic view of the three-dimensional structure of the present application.

[0022] Figure 3 It is a schematic view of the cross-sectional structure of the present application.

[0023] Figure 4 It is Figure 3 It is a schematic view of the structure when the shear pin is pulled out.

[0024] In the figure, 1 is a hollow hydraulic jack, 1.1 is a plunger, 2 is a bolt, 3 is an oil pipe, 4 is a hydraulic oil pump, 5 is a base, 5.1 is a blind hole, 5.2 is a communication hole, 5.3 is a groove, 6 is a crank arm, 6.1 is a pin hole, 7 is a nut, 8 is a shear pin, 9 is a check ring, 10 is an arc-shaped limiting plate, 11 is a T-shaped sleeve, and 12 is a washer. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] A hydraulic pulling-out tool for a guide vane shear pin of a water turbine, as shown in Figure 2 , mainly comprises a hollow hydraulic jack 1, a bolt 2, a hydraulic oil pump 4, a base 5 and a nut 7.

[0027] As shown in Figure 2 and Figure 3 , the plunger 1.1 of the hollow hydraulic jack 1 has a passage for the rod of the bolt 2 to pass through, the oil way joint of the hydraulic oil pump 4 and the hollow hydraulic jack 1 is connected by the oil pipe 3, and the plunger 1.1 of the hollow hydraulic jack 1 can be driven by the hydraulic oil pump 4.

[0028] As shown in Figure 3As shown in the drawings, the base 5 is cylindrical, and the bottom surface of the base 5 is provided with a blind hole 5.1 for the shear pin 8 and the retaining ring 9 to pass upward, when the shear pin 8 is pulled out, the base 5 is placed on the top surface of the toggle arm 6 and covers the retaining ring 9, the blind hole 5.1 provides a space for the shear pin 8 and the retaining ring 9, and a communication hole 5.2 is provided between the inner top surface of the blind hole 5.1 and the top surface of the base 5 for the bolt 2 to pass through, and the hollow hydraulic jack 1 can be installed on the top surface of the base 5; the bottom end of the base 5 is provided with a groove 5.3, the groove 5.3 communicates the inner side wall of the blind hole 5.1 and the outer side wall of the base 5, and the inside of the base 5 can be observed through the groove 5.3, which can facilitate the observation of whether the shear pin 8 is completely pulled out;

[0029] As shown in the drawings, Figure 3 the threaded end of the bolt 2 can pass through the inside of the plunger 1.1 of the hollow hydraulic jack 1, the communication hole 5.2 of the base 5 and the blind hole 5.1, and the inside of the shear pin 8 from top to bottom, and the head of the bolt 2 can abut against the top end surface of the plunger 1.1, and the nut 7 can be threadedly connected to the threaded end of the bolt 2 for limiting the shear pin 8 from the bottom, and the nut 7 can pass through the pin hole 6.1 on the toggle arm 6;

[0030] When the hydraulic pulling tool is used, the head of the bolt 2 on the plunger 1.1 of the hollow hydraulic jack 1 is used to make the bolt 2 and the nut 7 installed at the bottom of the bolt 2 drive the shear pin 8 to go up, and the shear pin 8 broken in the pin hole 6.1 can be pulled out upward.

[0031] Preferably, in the embodiment, as shown in the drawings, Figure 3 the top surface of the base 5 is provided with three arc-shaped limiting plates 10 distributed in a ring shape with the center line of the communication hole 5.2 as the center, and the center line of the arc-shaped limiting plate 10 is coaxial with the center line of the communication hole 5.2, and the three arc-shaped limiting plates 10 are used to enclose and limit the hollow hydraulic jack 1, so as to avoid the hollow hydraulic jack 1 from sliding off the top surface of the base 5, and the hollow hydraulic jack 1 is directly placed in the interval enclosed by the three arc-shaped limiting plates 10 when installed, and is directly lifted when removed, which can facilitate the installation and removal, and the oil way joint of the hollow hydraulic jack 1 is passed out through the gap between the adjacent two arc-shaped limiting plates 10 to connect the oil pipe 3.

[0032] Further, the arc-shaped limiting plate 10 is provided with a limiting bolt on the outer surface, the threaded part of the limiting bolt is in contact with the outer surface of the hollow hydraulic jack 1 through the arc-shaped limiting plate 10, and the threaded end of the limiting bolt is connected with a contact block, and the contact block is in contact with the outer surface of the hollow hydraulic jack 1, which is used to limit the hollow hydraulic jack 1.

[0033] Preferably, in the embodiment, as shown in the drawings, Figure 3As shown, the T-shaped sleeve 11 is arranged in the shear pin 8, and the outer wall of the lower section of the T-shaped sleeve 11 is in gap contact with the inner wall of the shear pin 8. The T-shaped sleeve 11 is sleeved on the rod of the bolt 2, and the inner wall of the T-shaped sleeve 11 is in gap contact with the outer wall of the rod of the bolt 2, so that the shear pin 8 and the bolt 2 are coaxial when the rod of the bolt 2 passes through the shear pin 8. When the shear pin 8 is pulled out upward, the T-shaped sleeve 11 can center the bolt 2 and the shear pin 8, which is more labor-saving.

[0034] As shown in the embodiment, the top and bottom of the bolt 2 are sleeved with washers 12. The outer diameter of the washer 12 on the top of the bolt 2 is greater than the inner diameter of the top end of the plunger 1.1, and the outer diameter of the washer 12 on the bottom of the bolt 2 is greater than the inner diameter of the shear pin 8 and less than the inner diameter of the pin hole 6.1. The washer 12 can disperse pressure and adjust size. Figure 3

[0035] Specifically, in the embodiment, the size of the shear pin 8 is as follows. The overall length of the shear pin 8 is 141 mm (including the height of the stop ring 9 of 11 mm). The upper section of the shear pin 8 is 69 mm long, and the inner hole of the shear pin 8 is 25 mm in minimum diameter and 50.7 mm in outer diameter. The outer diameter of the stop ring 9 is 60 mm. When the shear pin 8 is broken at the middle annular groove, the upper section of the shear pin 8 of 69 mm needs to be pulled out, that is, the length of the shear pin 8 shown in the middle is the length of the shear pin 8. Figure 3

[0036] The hollow hydraulic jack 1 is an RCH-20100 hollow hydraulic jack with a tonnage of 20T, a working stroke of 100 mm, a hole diameter of 28 mm, a body height of 202 mm, a protruding height of 12 mm, an outer diameter of 98 mm, an inner diameter of 78 mm, a main shaft outer diameter of 53 mm, and a net weight of 10 Kg. The hydraulic oil pump 4 is a manual hydraulic oil pump, such as a model SBD6.3G. The hollow hydraulic jack 1 and the hydraulic oil pump 4 are existing products, and other models can also be selected, which will not be described here.

[0037] The outer diameter of the cylindrical base 5 is at least greater than the outer diameter 98 mm of the hollow hydraulic jack 1. For example, the outer diameter of the base 5 is 120 mm, and the top surface has a mounting position of the arc-shaped limiting plate 10. The hole diameter of the blind hole 5.1 is at least greater than the outer diameter 60 mm of the stop ring 9, and the hole depth of the blind hole 5.1 is at least greater than the upper section length 69 mm of the shear pin 8. For example, the hole diameter of the blind hole 5.1 is 70 mm, and the hole depth is 100 mm.

[0038] In use, the blind hole 5.1 is coaxial with the communication hole 5.2. The blind hole 5.1 is coaxial with the shear pin 8.

[0039] The working principle of the hydraulic pulling-out tool is as follows: ​​

[0040] When the shear pin 8 of the guide vane of the water turbine is broken in the pin hole 6.1 of the toggle 6, as shown in Figure 3 shown, the base 5 is placed on the top surface of the toggle 6 and covers the top end retainer ring 9 of the shear pin 8, the hollow hydraulic jack 1 is placed inside the three arc-shaped limiting plates 10 and on the top surface of the base 5, the bolt 2 is screwed into the hollow hydraulic jack 1, the plunger 1.1, the through hole 5.2 and the blind hole 5.1 of the base 5, and then the threaded end of the bolt 2 is screwed into the internal passage of the shear pin 8 broken in the toggle 6, the threaded end of the bolt 2 is screwed out of the bottom end of the shear pin 8, and then the lower washer 12 and the nut 7 are installed in sequence, and the nut 7 is tightened, so that the head of the bolt 2 abuts against the bottom end of the plunger 1.1, and the nut 7 abuts against the bottom end of the shear pin 8, the oil way connector of the hollow hydraulic jack 1 is connected to the hydraulic oil pump 4 through the oil pipe 3, the hydraulic oil pump 4 is used to deliver hydraulic oil to the hollow hydraulic jack 1, so that the plunger 1.1 of the hollow hydraulic jack 1 is jacked up, and the head of the bolt 2 is pushed upward during the jacking process of the plunger 1.1, so that the bolt 2 and the nut 7 installed at the bottom of the bolt 2 drive the shear pin 8 to move upward in the pin hole 6.1 of the toggle 6, the pulling-out condition of the shear pin 8 can be observed through the groove 5.3 in the side wall at the bottom end of the base 5, and the hydraulic oil pump 4 is stopped when the bottom end of the shear pin 8 is observed to be pulled out of the top surface of the toggle 6, as shown in Figure 4 shown, the shear pin 8 broken in the pin hole 6.1 is successfully pulled out upward.

[0041] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. Hydraulic extraction tool for the shearing pins of the guide vanes of a hydraulic turbine, comprising a hollow hydraulic jack (1), characterized in that, Also include: Bolt (2), the threaded end of the bolt (2) from top to bottom through the hollow hydraulic jack (1) inside the plunger (1.1) and the inside of the shear pin (8); Base (5), the bottom surface of the base (5) is provided with a blind hole (5.1) for the shear pin (8) and its retainer (9) to go up, and a communication hole (5.2) is provided between the inner top surface of the blind hole (5.1) and the top surface of the base (5) for the bolt (2) to go in, and the hollow hydraulic jack (1) is installed on the top surface of the base (5); Nut (7), the nut (7) is threaded on the threaded end of the bolt (2), used to limit the shear pin (8) from the bottom, and the nut (7) passes through the pin hole (6.1) on the crank arm (6).

2. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate according to claim 1, characterized in that: Also include hydraulic oil pump (4), the hydraulic oil pump (4) is connected with the oil joint of the hollow hydraulic jack (1) through the oil pipe (3).

3. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate of claim 1, wherein: The top surface of the base (5) is provided with a plurality of arc-shaped limiting plates (10) which are distributed in a ring shape with the center line of the communication hole (5.2) as the center, and the center line of the plurality of arc-shaped limiting plates (10) is coaxial with the center line of the communication hole (5.2), and the plurality of arc-shaped limiting plates (10) are used to enclose and limit the hollow hydraulic jack (1).

4. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate of claim 3, wherein: The outer surface of the arc-shaped limiting plate (10) is provided with a limiting bolt, and the threaded part of the limiting bolt is in contact with the outer surface of the hollow hydraulic jack (1).

5. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate as defined in claim 4 wherein: The threaded end of the limiting bolt is connected with a contact block, and the contact block is in contact with the outer surface of the hollow hydraulic jack (1).

6. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate as defined in claim 1 wherein: The base (5) is cylindrical, and the bottom end of the base (5) is provided with a groove (5.3) which communicates with the inner side wall of the blind hole (5.1) and the outer side wall of the base (5).

7. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate as defined in claim 1 wherein: The blind hole (5.1) and the communication hole (5.2) are coaxial.

8. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate of claim 7, wherein: The blind hole (5.1) and the shear pin (8) are coaxial.

9. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate of claim 1, wherein: Also include T-shaped sleeve (11), the lower segment of the T-shaped sleeve (11) is installed in the shear pin (8), and the outer side wall of the lower segment of the T-shaped sleeve (11) is in gap contact with the inner side wall of the shear pin (8), and the T-shaped sleeve (11) is sleeved on the rod part of the bolt (2), and the inner side wall of the T-shaped sleeve (11) is in gap contact with the outer side wall of the rod part of the bolt (2).

10. The hydraulic guillotine pin extraction tool for a hydraulic turbine wicket gate as defined in claim 1 wherein: The top and bottom of the bolt (2) are sleeved with a washer (12), the outer diameter of the washer (12) at the top of the bolt (2) is greater than the inner diameter of the top end of the plunger (1.1), and the outer diameter of the washer (12) at the bottom of the bolt (2) is greater than the inner diameter of the shear pin (8) and less than the inner diameter of the pin hole (6.1).

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