CN222726631U

CN222726631U - Pin puller

Info

Publication number: CN222726631U
Application number: CN202421556009.6U
Authority: CN
Inventors: 杨洪亮; 杨雨; 刘海常; 明飞翔; 夏超; 雷立峰; 白新磊; 董志国; 梁阳; 王岩
Original assignee: Liaoning Hongyanhe Nuclear Power Co Ltd
Current assignee: Liaoning Hongyanhe Nuclear Power Co Ltd
Priority date: 2024-07-03
Filing date: 2024-07-03
Publication date: 2025-04-08
Anticipated expiration: 2034-07-03

Abstract

The pin puller disclosed in the utility model relates to the technical field of nuclear power mechanical equipment maintenance, including a connecting piece, a tension piece and a push piece. The connecting piece is provided with a first connecting hole and a second connecting hole, the axes of the first connecting hole and the second connecting hole are parallel, and the second connecting hole is a threaded hole; the tension piece passes through the first connecting hole, and the first end is provided with a first positioning portion for abutting against the first side surface of the connecting piece, and the second end is provided with an external thread for screwing with the threaded connecting hole on the positioning pin; the push piece passes through the second connecting hole, and is provided with an external thread for screwing with the second connecting hole, and the push piece is used to abut against the workpiece to be disassembled. The utility model only applies tensile stress to the threaded connecting hole on the positioning pin during the pin pulling process, avoiding rotational torque, thereby making the tension piece less likely to break, thereby improving work efficiency.

Description

Pin puller

Technical Field

The utility model relates to the technical field of maintenance of nuclear power mechanical equipment, in particular to a pin puller.

Background

In nuclear power mechanical equipment, the matching size requirements of each part of a pump and a fan are strict. During installation, it must be ensured that the relative dimensions of the individual components meet the fit requirements and that no relative movement between the components is required during operation. For this reason, end caps, bottom plates, bearing chambers, etc. need to rely on locating pins to ensure accurate positioning.

Referring to fig. 1, a prior art dowel 210 is perforated at the top and is internally threaded. The dismounting mode adopts a combination of the sleeve 10, the screw rod 12 and the nut 11, and the positioning pin 210 is dismounted by rotating the nut 11 on the screw rod 12. However, there are some hidden hazards to this approach:

Because of the small internal thread gauge on the dowel pin 210, the lead screw 12 and nut 11 are prone to slipping and even breaking when the dowel pin 210 is over-tightened.

When the positioning pin 210 is too tight, a large force needs to be applied to rotate the nut 11, which easily causes damage to the hexagonal head of the nut 11, and thus, the nut cannot be used continuously.

Therefore, designing a new type of heavy pin puller to reduce the probability of tool damage is a technical problem that needs to be solved urgently by those skilled in the art.

Disclosure of utility model

Accordingly, the present utility model is directed to a pin puller for reducing the probability of tool damage.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a pin puller, comprising:

The connecting piece is provided with a first connecting hole and a second connecting hole in a penetrating mode, the axes of the first connecting hole and the second connecting hole are parallel, and the second connecting hole is a threaded hole;

the tension piece passes through the first connecting hole, a first positioning part used for being abutted against the first side surface of the connecting piece is arranged at the first end, and an external thread used for being in screwing fit with the positioning pin is arranged at the second end;

The pushing piece penetrates through the second connecting hole and is provided with external threads in screwing fit with the second connecting hole, and the pushing piece is used for being abutted with a workpiece to be disassembled.

Optionally, in the pin puller, the second connecting holes are a plurality of holes uniformly formed around the circumference of the first connecting hole, and the pushing pieces are a plurality of holes correspondingly matched with the second connecting holes one by one.

Optionally, in the pin puller, the extension lengths of the plurality of pushing members are the same or different.

Optionally, in the pin puller, an outer diameter of the pulling member is smaller than an outer diameter of the pushing member.

Optionally, in the pin puller, the pushing member is provided with a second positioning portion for abutting against the first side surface of the connecting member.

Optionally, in the pin puller, a circumferential outer diameter of the first positioning portion is smaller than a circumferential outer diameter of the second positioning portion.

Optionally, in the pin puller, the first positioning portion and the tension member are of an integral structure, and the second positioning portion and the pushing member are of an integral structure.

Optionally, in the pin puller, an anti-falling portion is disposed at an end of the second end of the pushing member, a cross-sectional area of the anti-falling portion is larger than a cross-sectional area of the second connecting hole, and the anti-falling portion is used for abutting against the second side face of the connecting member.

Optionally, in the pin puller, a buffer member is disposed on a side of the anti-falling portion facing away from the connecting member, and the buffer member is made of a flexible material.

Optionally, in the pin puller, the tension member is a plurality of tension members detachably disposed on the connecting member, and different tension members have different outer diameters.

The pin puller comprises a connecting piece, a pulling piece and a pushing piece, wherein a first connecting hole and a second connecting hole are formed in the connecting piece in a penetrating mode, the axes of the first connecting hole and the second connecting hole are parallel, the second connecting hole is a threaded hole, the pulling piece penetrates through the first connecting hole, a first positioning part used for being abutted to the first side face of the connecting piece is arranged at the first end, an external thread used for being in screwed fit with the threaded connecting hole on the positioning pin is arranged at the second end, the pushing piece penetrates through the second connecting hole and is provided with an external thread in screwed fit with the second connecting hole, and the pushing piece is used for being abutted to a workpiece to be disassembled.

When the locating pin is pulled out of the workpiece to be disassembled and assembled, the connecting piece is required to be placed at the workpiece to be disassembled and assembled, the first connecting hole is aligned with the locating pin on the workpiece to be disassembled and assembled, the tension piece passes through the first connecting hole and is screwed and matched with the threaded connecting hole on the locating pin, then the pushing piece passes through the second connecting hole and is abutted to the workpiece to be disassembled and assembled, the connecting piece moves in the direction away from the workpiece to be disassembled and assembled through screwing the pushing piece, and under the interaction of the first side face of the connecting piece and the first locating part, the tension piece is synchronously driven to move in the direction away from the workpiece to be disassembled and assembled, and then the locating pin can be synchronously driven to move relative to the workpiece to be disassembled and assembled, and the connecting piece is pulled out from the workpiece to be disassembled and assembled. In the process of pulling out the locating pin from the workpiece to be disassembled, the locating pin only receives the pulling force of the pin puller, and does not receive screwing force.

Compared with the prior art, the pin puller provided by the utility model only applies tensile stress to the threaded connection hole on the positioning pin in the pin pulling process, so that the rotation torque is avoided, the tension piece is not easy to break, and the working efficiency is further improved. The pin puller provided by the utility model can effectively disassemble the fastened positioning pin, has a simple structure, is easy to control the cost, and is suitable for the disassembly work of the positioning pin on various pumps and fans.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art pin puller;

FIG. 2 is a schematic view of a pin puller according to a first embodiment of the present utility model;

FIG. 3 is a front view of a pin puller disclosed in a first embodiment of the present utility model;

FIG. 4 is a top view of a pin puller disclosed in a first embodiment of the present utility model;

FIG. 5 is a schematic view of a pin puller according to a second embodiment of the present utility model;

FIG. 6 is a schematic view illustrating the use of a pin puller according to a third embodiment of the present utility model;

FIG. 7 is a schematic view of a pin puller according to a fourth embodiment of the present utility model;

FIG. 8 is a schematic view of a pin puller according to a fifth embodiment of the present utility model;

fig. 9 is a schematic structural view of a pin puller according to a sixth embodiment of the present utility model.

Wherein 10 is a sleeve, 11 is a nut, and 12 is a screw rod;

100 is a connecting piece, 110 is a pushing piece, 111 is a second positioning part, 112 is an anti-falling part, 120 is a pulling piece, and 121 is a first positioning part;

200 is a workpiece to be disassembled and 210 is a positioning pin.

Detailed Description

The core of the utility model is to disclose a pin puller to reduce the probability of tool damage.

Hereinafter, embodiments will be described with reference to the drawings. Furthermore, the embodiments shown below do not limit the summary of the utility model described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the utility model described in the claims. For convenience of description, only a portion related to the present utility model is shown in the drawings. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Referring to fig. 2 and 3, the pin puller disclosed by the utility model comprises a connecting piece 100, a tension piece 120 and a pushing piece 110, wherein a first connecting hole and a second connecting hole are formed in the connecting piece 100 in a penetrating manner, the axes of the first connecting hole and the second connecting hole are parallel, the second connecting hole is a threaded hole, the tension piece 120 penetrates through the first connecting hole, a first positioning part 121 for abutting against a first side surface of the connecting piece 100 is arranged at a first end, an external thread for screwing and matching with a threaded connecting hole on a positioning pin 210 is arranged at a second end, the pushing piece 110 penetrates through the second connecting hole and is provided with an external thread for screwing and matching with the second connecting hole, and the pushing piece 110 is used for abutting against a workpiece 200 to be disassembled.

When the positioning pin 210 is pulled out from the workpiece 200 to be disassembled, the connecting piece 100 needs to be placed at the workpiece 200 to be disassembled, the first connecting hole is aligned with the positioning pin 210 on the workpiece 200 to be disassembled, the tension piece 120 passes through the first connecting hole and is screwed and matched with the threaded connecting hole on the positioning pin 210, the pushing piece 110 passes through the second connecting hole and is abutted against the workpiece 200 to be disassembled, the pushing piece 110 is screwed to enable the connecting piece 100 to move in a direction away from the workpiece 200 to be disassembled, and the tension piece 120 is synchronously driven to move in a direction away from the workpiece 200 to be disassembled under the interaction of the first side surface of the connecting piece 100 and the first positioning part 121, so that the positioning pin 210 can be synchronously driven to move relative to the workpiece 200 to be disassembled, and pulled out from the workpiece 200 to be disassembled. During the process of pulling out the positioning pin 210 from the workpiece 200 to be disassembled, the positioning pin 210 is only subjected to the pulling force of the pin puller, and is not subjected to the screwing force.

Compared with the prior art, the pin puller disclosed by the utility model only applies tensile stress to the threaded connection hole on the positioning pin 210 in the pin pulling process, and does not apply rotational torque, so that the tension member 120 is less prone to fracture, further the working efficiency can be improved, and the pin puller disclosed by the utility model can detach and position the tightly-biased positioning pin 210, has a simple structure, is easy to control the cost, and can be suitable for the detachment work of the positioning pin 210 on various pumps and fans.

With reference to fig. 2, the pushing member 110 is provided with a second positioning portion 111 for abutting against the first side surface of the connecting member 100, and the second positioning portion 111 is configured to facilitate the operation of the screwing tool, and further to avoid the pushing member 110 from being directly separated from the second connecting hole in the pin pulling process.

The first positioning portion 121 and the tension member 120 may be in an integrated structure, and the second positioning portion 111 and the pushing member 110 may be in an integrated structure.

In some embodiments, referring to fig. 3 and fig. 4, the pulling member 120 and the pushing member 110 are both screw rods, the first positioning portion 121 and the second positioning portion 111 are both hexagonal structures, the pulling member 120 and the first positioning portion 121 form a pin connection bolt, the pushing member 110 and the second positioning portion 111 form a jack-up bolt, that is, the present utility model connects the positioning pin 210 through the pin connection bolt, and pulls out the positioning pin 210 through rotating the jack-up bolt.

The pushing member 110, the pulling member 120, the first positioning portion 121 and the second positioning portion 111 may be made of stainless steel or carbon steel, and the raw materials are cheap and easy to obtain, and easy to control the cost.

To further ensure the reliability of the operation, the outer diameter of the pulling member 120 is smaller than the outer diameter of the pushing member 110. The outer diameter of the pulling member 120 is affected by the size of the positioning pin 210, and the size of the pushing member 110 is not affected by the size of the positioning pin 210, so that the size of the pushing member 110 can be properly increased, the contact area between the pushing member 110 and the workpiece 200 to be disassembled is increased, and the reliability of force application is increased.

Taking the jacking bolt formed by the jacking piece 110 and the second positioning part 111 as an example, when the jacking bolt is large in size, a larger wrench can be used for screwing operation, so that the labor is saved, when the jacking bolt is large in size, sliding wires are not easy to occur, the hexagon head (the second positioning part 111) is not easy to damage, and when the jacking bolt is large in size, larger pulling force can be applied to the positioning pin 210, and the success rate of pulling out the positioning pin 210 is improved.

Specifically, in order to ensure the stability of the stress of the connecting piece 100 during the process of pulling out the positioning pin 210, the second connecting holes are a plurality of holes uniformly formed around the circumference of the first connecting hole, and the pushing pieces 110 are a plurality of holes correspondingly matched with the second connecting holes one by one.

Referring to fig. 3 and fig. 4, a scheme is shown in which the number of the second connecting holes is two, and the number of the corresponding pushing members 110 is also two, so that in the process of pulling out the positioning pin 210, the two pushing members 110 need to be screwed synchronously, so as to ensure that the moving direction of the connecting member 100 is consistent with the axial direction of the positioning pin 210.

Wherein, as shown in fig. 2 and 5, the screwing directions of the internal threads of the two second connecting holes can be the same or different.

Referring to fig. 9, the number of the second connecting holes is three, and the number of the corresponding pushing members 110 is also three, so that in the process of pulling out the positioning pin 210, the three pushing members 110 need to be screwed synchronously, so as to ensure that the moving direction of the connecting member 100 is consistent with the axial direction of the positioning pin 210.

Referring to fig. 6, the extension lengths of the pushing members 110 may be the same or different, and the pushing members 110 with the same extension length may be used in a scenario where the surface to be assembled (the plane in a certain range around the location of the locating pin 210) of the workpiece 200 to be assembled and disassembled is planar, and the pushing members 110 with different extension lengths are conveniently applicable to a scenario where the surface to be assembled and disassembled of the workpiece 200 to be assembled and disassembled is of a non-planar structure (for example, a groove structure is formed on the surface to be assembled and disassembled). Preferably, the pushing member 110 is detachably connected to the connecting member 100, so that the pushing member 110 with different sizes (extending lengths) can be replaced conveniently.

In some embodiments, in order to avoid the separation of the pushing member 110 and the pulling member 120, in conjunction with fig. 7, an anti-falling portion 112 may be disposed at an end of the second end of the pushing member 110, where the cross-sectional area of the anti-falling portion 112 is larger than that of the second connecting hole, so as to be abutted with the second side surface (opposite to the first side surface of the connecting member 100) of the connecting member 100.

Specifically, the anti-falling portion 112 may be an anti-falling nut screwed with the pushing member 110, in the accommodating process, the pushing member 110 may be fixed on the connecting member 100 without loosening, when the positioning pin 210 is pulled out, whether the anti-falling nut is removed from the pushing member 110 according to the requirement, or the anti-falling portion 112 may be welded to an anti-falling nut or a limiting block at the second end of the pushing member 110.

Further, in order to avoid damage to the surface to be disassembled of the workpiece 200 caused by excessive pushing force of the pushing member 110, a buffer member is disposed on a side of the anti-falling portion 112 facing away from the connecting member 100, and the buffer member is made of a flexible material, and may be a flexible rubber pad or other member.

In order not to affect the cooperation between the tension member 120 and the positioning pin 210, the first connecting hole is a polished hole, the first end of the tension member 120 is a polished rod structure, and the connecting member 100 only applies a force to the tension member 120 through the first positioning portion 121 in the process of pulling out the positioning pin 210.

Referring to fig. 4 and 9, the connector 100 may be a plate-shaped member, and the connector 100 may be a plate-shaped structural member with a regular rectangular section or a circular section, which has higher structural strength and is suitable for the occasion of higher pin pulling force of the positioning pin 210. Or in connection with fig. 8, the shape of the connector 100 may be configured in connection with the specific locations and numbers of the first and second connection holes to reduce the volume and mass of the connector 100.

Wherein, the connector 100 may be made of stainless steel or carbon steel.

It will be appreciated that, according to the aperture of the threaded connection hole on the actual positioning pin 210, the outer diameter of the second end of the tension member 120 needs to be adapted to the threaded connection hole, so that in order to facilitate the replacement of tension members 120 with different sizes, the tension members 120 are detachably disposed on the connecting member 100, and the outer diameters of different tension members 120 are different, so that the tension members 120 adapted to the threaded connection hole on the positioning pin 210 can be selected for the pin pulling operation.

The concrete implementation process of the utility model comprises the steps of installing a jacking bolt (pushing piece 110) on a second connecting hole on a connecting piece 100, enabling the jacking bolt to expose a second side surface 1-2 of the connecting piece 100 to be buckled (buckling refers to complete screw of threads, namely complete circle of the threads), enabling a pin connecting bolt (pulling piece 120) to pass through the connecting piece 100 and then be screwed into a threaded connecting hole on a positioning pin 210, adjusting the position of the connecting piece 100 to enable the jacking bolt to be contacted with a surface to be disassembled of a workpiece 200 to be disassembled, synchronously rotating the two jacking bolts, pulling out the positioning pin 210, and separating the pin connecting bolt from the positioning pin 210 after the positioning pin 210 is pulled out, and storing the pin connecting bolt and the positioning pin 210 respectively. The utility model can complete the pulling-out of the positioning pin 210 only by a spanner or a sleeve, and is easy to operate.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. The particular means of carrying out some embodiments may be combined in part or whole with another embodiment without being expressly excluded from the other embodiment. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pin puller, comprising:

The connecting piece (100), a first connecting hole and a second connecting hole are formed in the connecting piece (100) in a penetrating mode, the axes of the first connecting hole and the second connecting hole are parallel, and the second connecting hole is a threaded hole;

The tension piece (120) penetrates through the first connecting hole, a first positioning part (121) used for being abutted against the first side surface of the connecting piece (100) is arranged at the first end, and an external thread used for being in screwing fit with the positioning pin (210) is arranged at the second end;

The pushing piece (110) penetrates through the second connecting hole, an external thread in screwing fit with the second connecting hole is arranged on the pushing piece (110), and the pushing piece (110) is used for being abutted with a workpiece (200) to be disassembled.

2. The pin puller of claim 1, wherein the second connecting holes are a plurality of holes uniformly formed around the circumference of the first connecting hole, and the pushing members (110) are a plurality of holes correspondingly matched with the second connecting holes one by one.

3. The pin puller of claim 2, wherein the extension lengths of the plurality of pushing members (110) are the same or different.

4. The pin puller of claim 1, wherein the pulling member (120) has an outer diameter that is smaller than an outer diameter of the pushing member (110).

5. Pin puller according to claim 1, characterized in that the pushing member (110) is provided with a second positioning portion (111) for abutment with the first side of the connecting member (100).

6. Pin puller according to claim 5, characterized in that the circumferential outer diameter of the first positioning part (121) is smaller than the circumferential outer diameter of the second positioning part (111).

7. The pin puller according to claim 5, characterized in that the first positioning part (121) is of an integral structure with the tension member (120), and the second positioning part (111) is of an integral structure with the pushing member (110).

8. The pin puller according to claim 1, characterized in that an end of the second end of the pushing member (110) is provided with a drop-off prevention portion (112), the drop-off prevention portion (112) having a cross-sectional area larger than that of the second connecting hole, the drop-off prevention portion (112) being adapted to abut against the second side surface of the connecting member (100).

9. Pin puller according to claim 8, characterized in that the side of the anti-drop (112) facing away from the connecting piece (100) is provided with a buffer piece, which is made of a flexible material.

10. Pin puller according to claim 1, characterized in that the tension member (120) is a plurality of the tension members detachably arranged on the connecting member (100), and that different tension members (120) have different outer diameters.