Pull-out tool for shear pin

Abstract

The shear pin pulling tool comprises a connecting assembly, a supporting disc, a lifting screw rod, a limiting piece, a clamping piece and a fixing piece, the lifting screw rod is arranged in the supporting disc, the limiting piece is arranged on the outer side of the lifting screw rod, the clamping piece is arranged at the bottom of the lifting screw rod, and the fixing piece is arranged on the supporting disc. The fixing piece is arranged on the outer side of the clamping piece. The shear pin pulling device has the advantages that when the shear pin is pulled out, after the shear pin is broken, the base is inserted into a center hole of the shear pin, then the sleeve is moved downwards through the connecting sleeve, the sleeve pushes the claw block downwards, the claw block overturns outwards to be connected to the bottom of the shear pin in a clamped mode, and at the moment, the sleeve is fixed to the lifting screw rod through the locking nut; then the supporting screw rod is rotated to limit the supporting disc on the guide vane, then the lifting screw rod is rotated, the claw block and the base are driven to move upwards through the lifting screw rod, and therefore the shear pin is taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of shear pin extraction, in particular to a shear pin extraction tool. Background Art

[0002] During the operation of a hydro-generating unit, foreign matters often get mixed in the water and get stuck between the guide vanes of the water turbine. At this time, if the guide vanes are adjusted, the guide vanes may be damaged. At this time, the shear pin plays a role. The shear pin is located in the pin holes of the guide vane connecting plate and the toggle arm. Under normal circumstances, when the guide vane moves, the shear pin has enough strength to drive the guide vane to rotate. However, when there is a foreign object stuck between the guide vanes, the guide vane arm cannot rotate, while the connecting plate rotates under the drive of the governor ring. Therefore, a shearing force is generated on the shear pin. When this shearing force is greater than the normal operating stress, the shear pin is cut off, and this guide vane is disengaged from control, but the other guide vanes can still rotate normally, avoiding the expansion of the accident. However, the installation position of the guide vane shear pin is often relatively narrow. After the shear pin is disconnected, the upper half is relatively easy to take out, while the lower half is not easy to take out due to the narrow position or deformation during fracture. Summary of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. In this part, as well as in the abstract and the title of the utility model of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract of the specification, and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above and / or problems existing in the existing shear pin extraction tools, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present utility model is that the installation position of the existing guide vane shear pin is often relatively narrow. After the shear pin is disconnected, the upper half is relatively easy to take out, while the lower half is not easy to take out due to the narrow position or deformation during fracture.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: a shear pin extraction tool, which includes a connection assembly, including a support disk, a lifting screw, a limiting member, a clamping member, and a fixing member. The lifting screw is arranged inside the support disk, the limiting member is arranged outside the lifting screw, the clamping member is arranged at the bottom of the lifting screw, and the fixing member is arranged outside the clamping member.

[0007] As a preferred scheme of the shear pin extraction tool of the present utility model, wherein: the limiting member includes a support screw, a connecting pad, and a screw hole. The support screw is arranged inside the support disk, the connecting pad is arranged at the bottom of the support screw, and the screw hole is arranged inside the support disk.

[0008] As a preferred solution of the shear pin extraction tool of the present utility model, wherein: the clamping member includes a connecting rod, a base and a claw block, the connecting rod is arranged at the bottom of the lifting screw, the base is arranged outside the connecting rod, and the claw block is arranged outside the base.

[0009] As a preferred solution of the shear pin extraction tool of the present utility model, wherein: the clamping member further includes a hinge and a spring, the hinge is arranged outside the base, and the spring is arranged outside the base.

[0010] As a preferred solution of the shear pin extraction tool of the present utility model, wherein: the fixing member includes a sleeve and a connecting sleeve, the sleeve is arranged outside the lifting screw, and the connecting sleeve is arranged outside the sleeve.

[0011] As a preferred solution of the shear pin extraction tool of the present utility model, wherein: the fixing member further includes a locking nut, and the locking nut is arranged outside the sleeve.

[0012] The beneficial effect of the present utility model is: when extracting the shear pin, after the shear pin breaks, insert the base into the central hole of the shear pin, then move the sleeve downward through the connecting sleeve, the sleeve pushes the claw block downward, and the claw block turns outward and is clamped at the bottom of the shear pin. At this time, fix the sleeve on the lifting screw through the locking nut, then rotate the support screw to limit the support disk on the guide vane, and then rotate the lifting screw. Drive the claw block and the base to move upward through the lifting screw, so as to take out the shear pin. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Among them:

[0014] Figure 1 It is the overall structure diagram of the shear pin extraction tool.

[0015] Figure 2 It is the structure diagram of the clamping member of the shear pin extraction tool.

[0016] Figure 3 It is the structure diagram of the clamping member and the fixing member of the shear pin extraction tool.

[0017] Figure 4 It is the structure diagram of the support disk of the shear pin extraction tool.

[0018] Reference numerals in the figures: 100, connecting component; 101, supporting disc; 102, lifting screw; 103, limiting member; 103a, supporting screw; 103b, connecting pad; 103c, screw hole; 104, clamping member; 104a, connecting rod; 104b, base; 104c, hinge; 104d, claw block; 104e, spring; 105, fixing member; 105a, sleeve; 105b, connecting sleeve; 105c, locking nut. Detailed implementation manners

[0019] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings of the specification.

[0020] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0021] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0022] Embodiment 1

[0023] Referring to Figures 1 to 4 , which is the first embodiment of the present utility model. This embodiment provides a shear pin extraction tool. The shear pin extraction tool includes a connecting component 100. The tool is connected to the shear pin through the connecting component 100, and then the shear pin is extracted.

[0024] The connecting component 100 includes a supporting disc 101, a lifting screw 102, a limiting member 103, a clamping member 104 and a fixing member 105. The lifting screw 102 is disposed inside the supporting disc 101. The limiting member 103 is disposed outside the lifting screw 102. The clamping member 104 is disposed at the bottom of the lifting screw 102. The fixing member 105 is disposed outside the clamping member 104.

[0025] It is fixed on the shear pin by using the clamping member 104, fixed on the lifting screw 102 by using the fixing member 105, and the lifting screw 102 is fixed by using the limiting member 103 and the supporting disc 101.

[0026] Embodiment 2

[0027] Referring to Figure 2 andFigure 3 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0028] Specifically, the limiting member 103 includes a support screw 103a, a connecting pad 103b, and a screw hole 103c. The support screw 103a is disposed inside the support disk 101, the connecting pad 103b is disposed at the bottom of the support screw 103a, and the screw hole 103c is disposed inside the support disk 101.

[0029] The screw hole 103c is formed in the support disk 101 and symmetrically provided with three. The support screw 103a is threadedly installed in the screw hole 103c, and the connecting pad 103b is fixedly installed at the bottom of the support screw 103a. Rotating the support screw 103a in the screw hole 103c drives the connecting pad 103b at its bottom to be clamped on the guide vane, thereby limiting the support disk 101 on the guide vane.

[0030] Specifically, the clamping member 104 includes a connecting rod 104a, a base 104b, and a claw 104d. The connecting rod 104a is disposed at the bottom of the lifting screw 102, the base 104b is disposed outside the connecting rod 104a, and the claw 104d is disposed outside the base 104b.

[0031] The connecting rod 104a is rotatably installed at the bottom of the lifting screw 102, the base 104b is fixedly installed at the bottom of the connecting rod 104a, and the claw 104d is disposed on the top of the base 104b and symmetrically provided with three.

[0032] Specifically, the clamping member 104 further includes a hinge 104c and a spring 104e. The hinge 104c is disposed outside the base 104b, and the spring 104e is disposed outside the base 104b.

[0033] The claw 104d is rotatably installed on the base 104b through the hinge. One end of the spring 104e is fixedly installed at the bottom of the claw 104d, and the other end is fixedly installed on the base 104b. The spring 104e can be used to automatically reset the claw 104d.

[0034] The locking nut 105c is disposed on the upper part of the sleeve 105a and is threadedly connected to the lifting screw 102.

[0035] Embodiment 3

[0036] Refer to Figure 4 , which is the third embodiment of the present utility model, and this embodiment is based on the previous two embodiments.

[0037] Specifically, the fixing member 105 includes a sleeve 105a and a connecting sleeve 105b. The sleeve 105a is disposed outside the lifting screw 102, and the connecting sleeve 105b is disposed outside the sleeve 105a.

[0038] The sleeve 105a is inserted on the outside of the lifting screw 102, and the connecting sleeve 105b is fixedly installed on the outside of the sleeve 105a.

[0039] Specifically, the fixing member 105 further includes a locking nut 105c, and the locking nut 105c is arranged on the outside of the sleeve 105a.

[0040] During use, when pulling out the shear pin, after the shear pin breaks, the base 104b is inserted into the central hole of the shear pin, and then the sleeve 105a is moved downward through the connecting sleeve 105b. The sleeve 105a pushes the claw 104d downward, and the claw 104d turns outward and is clamped at the bottom of the shear pin. At this time, the sleeve 105a is fixed on the lifting screw 102 through the locking nut 105c. Then, the support screw 103a is rotated to limit the support disk 101 on the guide vane, and then the lifting screw 102 is rotated. The lifting screw 102 drives the claw 104d and the base 104b to move upward, so as to take out the shear pin.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A shear pin extraction tool, characterized in that: include, The connection assembly (100) comprises a support plate (101), a lifting screw rod (102), a limiting member (103), a clamping member (104) and a fixing member (105), wherein the lifting screw rod (102) is arranged inside the support plate (101), the limiting member (103) is arranged on the outside of the lifting screw rod (102), the clamping member (104) is arranged at the bottom of the lifting screw rod (102), and the fixing member (105) is arranged on the outside of the clamping member (104).

2. The shear pin extraction tool according to claim 1, characterized in that: The limiting member (103) comprises a supporting screw rod (103a), a connecting pad (103b) and a screw hole (103c); the supporting screw rod (103a) is arranged inside the supporting plate (101); the connecting pad (103b) is arranged at the bottom of the supporting screw rod (103a); and the screw hole (103c) is arranged inside the supporting plate (101).

3. The shear pin extraction tool according to claim 1, characterized in that: The clamping member (104) includes a connecting rod (104a), a base (104b) and a claw block (104d), wherein the connecting rod (104a) is arranged at the bottom of the lifting screw (102), the base (104b) is arranged on the outside of the connecting rod (104a), and the claw block (104d) is arranged on the outside of the base (104b).

4. The shear pin extraction tool according to claim 3, characterized in that: The clamping member (104) further comprises a hinge (104c) and a spring (104e), wherein the hinge (104c) is arranged on the outside of the base (104b), and the spring (104e) is arranged on the outside of the base (104b).

5. The shear pin extraction tool according to claim 1, characterized in that: The fixing member (105) comprises a sleeve (105a) and a connecting sleeve (105b), wherein the sleeve (105a) is arranged on the outside of the lifting screw (102), and the connecting sleeve (105b) is arranged on the outside of the sleeve (105a).

6. The shear pin extraction tool according to claim 5, characterized in that: The fixing member (105) further comprises a locking nut (105c), and the locking nut (105c) is arranged on the outside of the sleeve (105a).

Images