A pin puller

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

Technical Field

[0001] The utility model relates to the technical field of nuclear power mechanical equipment maintenance, and more specifically to a pin puller. Background Art

[0002] In nuclear power mechanical equipment, the matching dimensions of various components of pumps and fans are strictly required. During installation, it is necessary to ensure that the relative dimensions of various components meet the matching requirements, and there must be no relative movement between the components during operation. For this reason, the end cover, bottom plate, bearing chamber and other positions need to rely on positioning pins to ensure accurate positioning.

[0003] Combination Figure 1 The positioning pin 210 in the prior art has a hole at the top and is processed with an internal thread. The disassembly method uses a combination of a sleeve 10, a screw rod 12 and a nut 11, and the positioning pin 210 is disassembled by rotating the nut 11 on the screw rod 12. However, this method has some hidden dangers:

[0004] Since the internal thread on the positioning pin 210 is small in size, when the positioning pin 210 is over-tightened, the screw rod 12 and the nut 11 are prone to thread slippage or even breakage.

[0005] When the positioning pin 210 is too tight, a large force needs to be applied to rotate the nut 11, which may easily damage the hexagonal head of the nut 11 and make it impossible to continue to use.

[0006] Therefore, designing a novel heavy-duty pin puller to reduce the probability of tool damage has become a technical problem that those skilled in the art need to urgently solve. Utility Model Content

[0007] In view of this, an object of the present invention is to provide a pin puller to reduce the probability of tool damage.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A pin puller, comprising:

[0010] A connecting member, wherein a first connecting hole and a second connecting hole are formed through the connecting member, the axes of the first connecting hole and the second connecting hole are parallel, and the second connecting hole is a threaded hole;

[0011] A tension piece, wherein the tension piece passes through the first connecting hole, and a first end is provided with a first positioning portion for abutting against a first side surface of the connecting piece, and a second end is provided with an external thread for screwing with a positioning pin;

[0012] A pushing piece passes through the second connecting hole and is provided with an external thread screwed together with the second connecting hole, and the pushing piece is used to abut against the workpiece to be disassembled.

[0013] Optionally, in the above-mentioned pin puller, the second connecting holes are multiple and are evenly opened in the circumferential direction around the first connecting hole, and the pushing members are multiple and are matched with the second connecting holes in a one-to-one correspondence.

[0014] Optionally, in the above-mentioned pin puller, the extension lengths of the plurality of pushing members are the same or different.

[0015] Optionally, in the above-mentioned pin puller, the outer diameter of the tension member is smaller than the outer diameter of the pushing member.

[0016] Optionally, in the above-mentioned pin puller, a second positioning portion for abutting against the first side surface of the connecting member is provided on the pushing member.

[0017] Optionally, in the above-mentioned pin puller, the circumferential outer diameter of the first positioning portion is smaller than the circumferential outer diameter of the second positioning portion.

[0018] Optionally, in the above-mentioned pin puller, the first positioning portion and the pulling member are an integrated structure, and the second positioning portion and the pushing member are an integrated structure.

[0019] Optionally, in the above-mentioned pin puller, an anti-falling portion is provided at the end of the second end of the pushing member, the cross-sectional area of ​​the anti-falling portion is larger than the cross-sectional area of ​​the second connecting hole, and the anti-falling portion is used to abut against the second side surface of the connecting member.

[0020] Optionally, in the above-mentioned pin puller, a buffer is provided on the side of the anti-falling portion facing away from the connecting member, and the buffer is made of a flexible material.

[0021] Optionally, in the above-mentioned pin puller, the tension members are multiple and detachably arranged on the connecting member, and different tension members have different outer diameters.

[0022] The pin puller provided by the utility model comprises a connecting piece, a tension piece and a pushing 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 a first positioning portion for abutting against a first side surface of the connecting piece is provided at the first end, and an external thread for screwing and matching with the threaded connecting hole on the positioning pin is provided at the second end; the pushing piece passes 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 is used to abut against the workpiece to be disassembled.

[0023] When pulling out the locating pin from the workpiece to be disassembled, the connecting member needs to be placed on the workpiece to be disassembled, and the first connecting hole and the locating pin on the workpiece to be disassembled are aligned, and then the tension member is passed through the first connecting hole and screwed to fit with the threaded connecting hole on the locating pin, and then the push member is passed through the second connecting hole and abuts against the workpiece to be disassembled, and the connecting member is moved away from the workpiece to be disassembled by screwing the push member, and under the interaction of the first side surface of the connecting member and the first positioning portion, the tension member is synchronously driven to move away from the workpiece to be disassembled, and then the locating pin can be synchronously driven to move relative to the workpiece to be disassembled and pulled out from the workpiece to be disassembled. In the process of pulling the locating pin out of the workpiece to be disassembled, the locating pin is only subjected to the pulling force of the pin puller, and is not subjected to the screwing force.

[0024] 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 during the pin pulling process, avoiding rotational torque, thereby making the tension member less likely to break, thereby improving work efficiency. The pin puller provided by the utility model can effectively remove the fastened positioning pin, has a simple structure, is easy to control costs, and is suitable for the removal of positioning pins on various pumps and fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the use of a pin puller in the prior art;

[0027] Figure 2 This is a schematic diagram of the use of the pin puller disclosed in the first embodiment of the utility model;

[0028] Figure 3 It is a front view of the pin puller disclosed in the first embodiment of the utility model;

[0029] Figure 4 A top view of a pin puller disclosed in a first embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the use of the pin puller disclosed in the second embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the use of the pin puller disclosed in the third embodiment of the utility model;

[0032] Figure 7This is a schematic structural diagram of a pin puller disclosed in a fourth embodiment of the utility model;

[0033] Figure 8 This is a structural schematic diagram of a pin puller disclosed in a fifth embodiment of the utility model;

[0034] Fig. 9 This is a schematic structural diagram of a pin puller disclosed in a sixth embodiment of the utility model.

[0035] Among them, 10 is a sleeve, 11 is a nut, and 12 is a screw rod;

[0036] 100 is a connecting member, 110 is a pushing member, 111 is a second positioning portion, 112 is an anti-falling portion, 120 is a tension member, and 121 is a first positioning portion;

[0037] 200 is a workpiece to be disassembled and 210 is a positioning pin. DETAILED DESCRIPTION

[0038] The core of the utility model is to disclose a pin puller to reduce the probability of tool damage.

[0039] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0040] Combination Figure 2 and Figure 3 The pin puller disclosed in the utility model includes a connecting member 100, a tension member 120 and a pushing member 110. The connecting member 100 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 member 120 passes through the first connecting hole, and a first positioning portion 121 for abutting against a first side surface of the connecting member 100 is provided at the first end, and an external thread for screwing with the threaded connecting hole on the positioning pin 210 is provided at the second end; the pushing member 110 passes through the second connecting hole, and is provided with an external thread for screwing with the second connecting hole, and the pushing member 110 is used to abut against the workpiece 200 to be disassembled.

[0041] When pulling out the locating pin 210 from the workpiece 200 to be disassembled, it is necessary to first place the connecting member 100 on the workpiece 200 to be disassembled, and align the first connecting hole and the locating pin 210 on the workpiece 200 to be disassembled, then pass the tension member 120 through the first connecting hole, and screw it together with the threaded connecting hole on the locating pin 210, then pass the pushing member 110 through the second connecting hole, and abut against the workpiece 200 to be disassembled, and by screwing the pushing member 110, the connecting member 100 is moved away from the workpiece 200 to be disassembled. Under the interaction of the first side surface of the connecting member 100 and the first positioning portion 121, the tension member 120 is synchronously driven to move in the direction away from the workpiece 200 to be disassembled, and then the locating 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. In the process of pulling the positioning pin 210 out of the workpiece 200 to be disassembled, the positioning pin 210 is only subjected to the pulling force of the pin puller but not to the twisting force.

[0042] Compared with the prior art, the pin puller disclosed in the utility model only applies tensile stress to the threaded connection hole on the positioning pin 210 during the pin pulling process, but does not apply rotational torque, so that the tension member 120 is less likely to break, thereby improving work efficiency. The pin puller disclosed in the utility model can remove the positioning pin 210 that is positioned too tightly, has a simple structure, and is easy to control costs, and can be applied to the removal of the positioning pins 210 on various types of pumps and fans.

[0043] Combination Figure 2 The push member 110 is provided with a second positioning portion 111 for abutting against the first side surface of the connecting member 100. The setting of the second positioning portion 111 can facilitate the operation of the screwing tool and can also prevent the push member 110 from directly falling out of the second connecting hole during the pin removal process.

[0044] The first positioning portion 121 and the tension member 120 may be an integrated structure, and the second positioning portion 111 and the pushing member 110 may be an integrated structure.

[0045] In some embodiments, in combination Figure 3 and Figure 4 The tension member 120 and the push member 110 are both screws, the first positioning portion 121 and the second positioning portion 111 are both hexagonal head structures, the tension member 120 and the first positioning portion 121 form a pin connecting bolt, and the push member 110 and the second positioning portion 111 form a lifting bolt, that is, the utility model connects the positioning pin 210 through the pin connecting bolt, and the positioning pin 210 is pulled out by rotating the lifting bolt.

[0046] The pushing member 110 , the tension member 120 , the first positioning portion 121 and the second positioning portion 111 may all be made of stainless steel or carbon steel, and the raw materials are cheap and readily available, and the cost is easy to control.

[0047] In order to further ensure the reliability of the operation, the outer diameter of the tension member 120 is smaller than the outer diameter of the push member 110. The outer diameter of the tension member 120 is affected by the size of the positioning pin 210, while the size of the push member 110 is not affected by the size of the positioning pin 210. Therefore, the size of the push member 110 can be appropriately increased to increase the contact area between the push member 110 and the workpiece 200 to be disassembled and assembled, and to increase the reliability of the force application.

[0048] Taking the jacking bolt composed of the pushing piece 110 and the second positioning part 111 as an example, when the specifications of the jacking bolt are larger, a larger wrench can be used for the tightening operation, which is more labor-saving; when the specifications of the jacking bolt are larger, it is less likely to slip, and the hexagonal head (second positioning part 111) is also less likely to be damaged; when the specifications of the jacking bolt are larger, a greater pulling force can be applied to the positioning pin 210, thereby improving the success rate of pulling out the positioning pin 210.

[0049] Specifically, in order to ensure the stability of the force applied to the connector 100 during the process of pulling out the positioning pin 210, a plurality of second connecting holes are uniformly opened in the circumferential direction around the first connecting hole, and a plurality of push members 110 are matched one-to-one with the second connecting holes.

[0050] Combination Figure 3 and Figure 4 It shows a solution in which the number of the second connecting holes is two and the number of the corresponding pushing members 110 is also two. In the process of pulling out the positioning pin 210, the two pushing members 110 need to be screwed synchronously to ensure that the moving direction of the connecting member 100 is consistent with the axial direction of the positioning pin 210.

[0051] Among them, Figure 2 and Figure 5 As shown, the rotation directions of the internal threads of the two second connecting holes can be the same or different.

[0052] Combination Fig. 9 The figure shows a solution in which the number of the second connecting holes is three and the number of the corresponding pushing members 110 is also three. In the process of pulling out the positioning pin 210, the three pushing members 110 need to be screwed synchronously to ensure that the moving direction of the connecting member 100 is consistent with the axial direction of the positioning pin 210.

[0053] Combination Figure 6The extension lengths of different push pieces 110 may be the same or different. Push pieces 110 with the same extension length may be used in scenarios where the surface to be disassembled of the workpiece 200 to be disassembled (a plane within a certain range around the position of the positioning pin 210) is a plane, and push pieces 110 with different extension lengths may be used in scenarios where the surface to be disassembled of the workpiece 200 to be disassembled is a non-planar structure (for example, a groove structure is provided on the surface to be disassembled). Preferably, the push piece 110 is detachably connected to the connector 100, so that push pieces 110 of different sizes (extension lengths) can be easily replaced.

[0054] In some embodiments, in combination Figure 7 In order to avoid separation of the pushing member 110 and the pulling member 120, an anti-falling portion 112 can be provided at the end of the second end of the pushing member 110. The cross-sectional area of ​​the anti-falling portion 112 is larger than the cross-sectional area of ​​the second connecting hole, and is used to abut against the second side surface of the connecting member 100 (opposite to the first side surface of the connecting member 100).

[0055] Specifically, the anti-falling portion 112 can be an anti-falling nut that is screwed together with the pushing member 110. During the storage process, the pushing member 110 can be fixed on the connecting member 100 without loosening. When the positioning pin 210 is pulled out, the anti-falling nut can be removed from the pushing member 110 according to needs. Alternatively, the anti-falling portion 112 can be welded to the anti-falling nut or limit block at the second end of the pushing member 110.

[0056] Furthermore, in order to prevent the pushing force of the pushing member 110 from being too large and causing damage to the disassembly surface of the workpiece 200 to be disassembled, a buffer is provided on the side of the anti-fall-off portion 112 facing away from the connecting member 100. The buffer is made of a flexible material and can specifically be a flexible rubber pad or other component.

[0057] In order not to affect the cooperation between the tension piece 120 and the positioning pin 210, the first connecting hole is a smooth hole, and the first end of the tension piece 120 is a smooth rod structure. During the process of pulling out the positioning pin 210, the connecting piece 100 only applies force to the tension piece 120 through the first positioning portion 121.

[0058] Combination Figure 4 and Fig. 9 The connecting member 100 may be a plate-shaped member, and the connecting member 100 may be a plate-shaped member with a regular rectangular or circular cross section, which has a higher structural strength and is suitable for situations where the pin pulling force of the positioning pin 210 is greater. Figure 8 The shape of the connecting member 100 can be set in combination with the specific positions and quantities of the first connecting hole and the second connecting hole to reduce the volume and mass of the connecting member 100.

[0059] The connecting piece 100 can be made of stainless steel or carbon steel.

[0060] It can be understood that, according to the actual hole diameter of the threaded connection hole on the positioning pin 210, the outer diameter of the second end of the tension piece 120 needs to be adapted thereto. Therefore, in order to facilitate the replacement of tension pieces 120 of different sizes to match them for the pin pulling operation, the tension pieces 120 are detachably arranged on the connecting piece 100, and different tension pieces 120 have different outer diameters, so as to facilitate the selection of the tension piece 120 that is adapted to the threaded connection hole on the positioning pin 210 for the pin pulling operation.

[0061] The specific implementation process of the utility model is as follows: install the jacking bolt (thrusting member 110) to the second connection hole on the connecting member 100, and expose the jacking bolt 1-2 buckles ("buckle" refers to a complete spiral of the thread, that is, a complete circle of the thread) on the second side of the connecting member 100; screw the pin connection bolt (tension member 120) through the connecting member 100 and into the threaded connection hole on the positioning pin 210; adjust the position of the connecting member 100 so that the jacking bolt can contact the to-be-disassembled surface of the workpiece 200 to be disassembled; rotate the two jacking bolts synchronously to pull out the positioning pin 210; after the positioning pin 210 is pulled out, separate the pin connection bolt from the positioning pin 210 and store them separately. The utility model only needs a wrench or a socket to complete the pulling out of the positioning pin 210, which is easy to operate.

[0062] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A pin puller, characterized in that: include: A connecting piece (100), wherein a first connecting hole and a second connecting hole are formed through the connecting piece (100), the axes of the first connecting hole and the second connecting hole are parallel, and the second connecting hole is a threaded hole; A tension piece (120), the tension piece (120) passing through the first connection hole, the first end of which is provided with a first positioning portion (121) for abutting against the first side surface of the connection piece (100), and the second end of which is provided with an external thread for screwing with the positioning pin (210); A pushing piece (110) passes through the second connection hole and is provided with an external thread that is screwed together with the second connection hole, and the pushing piece (110) is used to abut against a workpiece (200) to be disassembled.

2. The pin puller according to claim 1, characterized in that: The second connection holes are multiple and are evenly arranged in the circumferential direction around the first connection hole, and the push pieces (110) are multiple and are matched one-to-one with the second connection holes.

3. The pin puller according to claim 2, characterized in that: The extension lengths of the plurality of pushing members (110) are the same or different.

4. The pin puller according to claim 1, characterized in that: The outer diameter of the tension member (120) is smaller than the outer diameter of the pushing member (110).

5. The pin puller according to claim 1, characterized in that: The pushing member (110) is provided with a second positioning portion (111) for abutting against the first side surface of the connecting member (100).

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

7. The pin puller according to claim 5, characterized in that: The first positioning portion (121) and the tension member (120) are an integrated structure, and the second positioning portion (111) and the pushing member (110) are an integrated structure.

8. The pin puller according to claim 1, characterized in that: An anti-falling portion (112) is provided at the end of the second end of the pushing member (110); the cross-sectional area of ​​the anti-falling portion (112) is larger than the cross-sectional area of ​​the second connecting hole; the anti-falling portion (112) is used to abut against the second side surface of the connecting member (100).

9. The pin puller according to claim 8, characterized in that: A buffer is provided on the side of the anti-falling portion (112) facing away from the connecting piece (100), and the buffer is made of a flexible material.

10. The pin puller according to claim 1, characterized in that: The tension members (120) are multiple and detachably arranged on the connecting member (100), and different tension members (120) have different outer diameters.

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