CN212265086U

CN212265086U - Pulley puller

Info

Publication number: CN212265086U
Application number: CN202020222391.2U
Authority: CN
Inventors: 徐殿才; 徐聪聪; 李延年; 李涛; 马云鹤; 金涛; 王健伟; 熊瑾�; 张宏梅
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2021-01-01
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a pulley puller for belt pulley, include: a jack base; the pulley pulling slip comprises at least two pulley pulling slips, wherein the at least two pulley pulling slips can be buckled to form a sleeve, and the sleeve can be sleeved on a belt pulley positioned on a motor shaft; at least two shoulder rods, wherein two ends of each shoulder rod are detachably connected between the jack base and the sleeve; the jack is abutted between the jack base and the motor shaft. The utility model discloses utilize the jack to support and push away the motion of jack base, the jack base drives two at least shoulder pole motions to two at least shoulder poles drive the sleeve motion rather than being connected, and then dismantle the belt pulley from the motor shaft, and the belt pulley of pulling out is intact harmless.

Description

Pulley puller

Technical Field

The utility model relates to an oil field maintenance tool technical field especially relates to a pulley puller.

Background

At present, two methods for adjusting the stroke frequency of the oil pumping unit are provided, one method is to adjust the stroke frequency by applying a frequency conversion principle to accelerate or reduce the revolution of a belt pulley, but the method has limitations; the other method is to replace the belt pulley, the method is a more common method, the belt pulley needs to be replaced when the frequency of punching is adjusted, a pulley extractor is needed to pull out the old belt pulley in the process of replacing the belt pulley, however, the existing pulley extractors are two, one is a hydraulic pulley extractor, the other is a mechanical pulley extractor, the grapple of the hydraulic pulley extractor and the grapple of the mechanical pulley extractor are wider, the tail end face of the narrow V-shaped belt pulley is a smooth plane, the distance between the tail end face of the belt pulley and the dust-proof cover of the motor is small, and the grapple can not extend into the belt pulley and can be used for pulling out the belt. Under the condition that the wheel can be pulled out, the phenomenon that the tail end surface is smooth and the grapple is easy to break away exists; the problem that a belt pulley groove is easy to be damaged when the belt pulley is pulled out and unloaded forcibly is solved due to the small area of the grabbing point of the grabbing hook.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pulley puller for solve the problem that current pulley puller exists, this pulley puller simple structure, convenient operation, and can guarantee that the belt pulley of pulling down is intact harmless.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a pulley puller for belt pulley, include: a jack base; the pulley pulling slip comprises at least two pulley pulling slips, wherein the at least two pulley pulling slips can be buckled to form a sleeve, and the sleeve can be sleeved on a belt pulley positioned on a motor shaft; at least two shoulder rods, wherein two ends of each shoulder rod are detachably connected between the jack base and the sleeve; the jack is abutted between the jack base and the motor shaft.

Preferably, the wheel pulling slip is provided with a groove capable of being buckled on the belt pulley, a plurality of shoulders are arranged on the inner wall of the groove at intervals along the axial direction of the belt pulley, and the shoulders can be clamped with the annular grooves on the belt pulley.

Preferably, the number of the wheel pulling slips is two, the sleeve formed after the two wheel pulling slips are buckled has two first connecting ends, the number of the shoulder rods is two, the jack base has two second connecting ends, and two ends of each shoulder rod are detachably connected between the first connecting end and the second connecting end which are oppositely arranged.

Preferably, the two wheel pulling slips are provided with semicircular sleeves and two connecting plates connected to two sides of the semicircular sleeves, after the wheel pulling slips are buckled, the semicircular sleeves are sleeved outside the belt pulley, and the two connecting plates, which are oppositely arranged, of the wheel pulling slips are jointed to form the first connecting end.

Preferably, at least three shoulders capable of being clamped with the plurality of annular grooves on the belt pulley are arranged on the inner wall of the semicircular sleeve at intervals along the axial direction of the belt pulley.

Preferably, the jack base is provided with a fixed block and a rod piece penetrating through the fixed block, the fixed block is provided with a mounting groove capable of accommodating the jack, and two second connecting ends are formed at two ends of the rod piece.

Preferably, the two ends of the shoulder rod are respectively provided with a mounting hole, and the mounting holes can be sleeved on the first connecting end or the second connecting end.

Preferably, the jack is provided with a hydraulic cylinder and a piston rod which is telescopically arranged in the hydraulic cylinder, the hydraulic cylinder abuts against the jack base, and the piston rod can abut against the motor shaft through a force transmission short joint.

Preferably, the hydraulic cylinder can be connected with an external hydraulic cylinder through a connecting pipeline, and the external hydraulic cylinder is provided with a plunger and a force application rod connected with the plunger.

Preferably, the jack base is made of 45 steel, the wheel pulling slip is made of 45 steel, and the shoulder rod is made of 45 steel.

The utility model discloses a characteristics and advantage are:

the jack is used for pushing the jack base to move, the jack base drives the at least two shoulder rods to move, the at least two shoulder rods drive the sleeves connected with the shoulder rods to move, the belt pulley is detached from the motor shaft, and the pulled belt pulley is intact.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of the pulley extractor of the present invention;

fig. 2 is a schematic structural view of the sleeve of the present invention;

FIG. 3 is a schematic structural view of the wheel pulling slip of the present invention;

FIG. 4 is a front view of the shoulder pole of the present invention;

FIG. 5 is a top view of the shoulder bar of the present invention;

fig. 6 is a front view of the jack base of the present invention;

fig. 7 is a left side view of the jack base of the present invention;

fig. 8 is a schematic structural view of the jack and the external hydraulic cylinder of the present invention.

Reference numerals and description:

100. a pulley puller for the belt pulley; 1. a jack base; 11. a second connection end; 12. a fixed block; 121. mounting grooves; 13. a rod member; 2. pulling a wheel slip; 21. a groove; 211. a shoulder is formed; 22. a semicircular sleeve; 23. a connecting plate; 3. a sleeve; 31. a first connection end; 4. a shoulder bar; 41. mounting holes; 5. a jack; 51. a hydraulic cylinder; 52. a piston rod; 53. connecting a pipeline; 54. a hydraulic cylinder is externally connected; 55. a plunger; 56. a stressing rod; 200. a motor shaft; 300. a belt pulley; 310. a ring groove; 400. a force transmission short joint.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a pulley puller 100, please refer to fig. 1 to 8, it includes jack base 1, two at least pull out wheel slips 2, two at least shoulder poles 4 and jack 5. Specifically, at least two wheel pulling slips 2 can be buckled to form a sleeve 3, and the sleeve 3 can be sleeved on a belt pulley 300 on a motor shaft 200; both ends of each shoulder rod 4 are detachably connected between the jack base 1 and the sleeve 3; the jack 5 abuts between the jack base 1 and the motor shaft 200.

The utility model discloses utilize jack 5 to support and push away jack base 1 motion, jack base 1 drives two at least shoulder poles 4 motions to two at least shoulder poles 4 drive the sleeve 3 motion rather than being connected, and then dismantle belt pulley 300 from motor shaft 200 get off, and the belt pulley 300 of pulling off is intact harmless. The pulley puller 100 has a simple structure and is convenient to operate.

Further, referring to fig. 2 and 3, the wheel pulling slip 2 has a groove 21 capable of being fastened on the pulley 300, the inner wall of the groove 21 is provided with a plurality of shoulders 211 at intervals along the axial direction of the pulley 300, and the plurality of shoulders 211 can be fastened with a plurality of ring grooves 310 on the pulley 300. Wherein, the recess 21 of pulling out wheel slips 2 is in order to guarantee to pull out wheel slips 2 can not the unidimensional belt pulley 300 of adaptation to guarantee to pull out the lock effect of wheel slips 2. In some embodiments, the number of the wheel-pulling slips 2 can be adjusted to ensure the buckling effect, so that the application range of the product is enlarged. In this embodiment, by providing the plurality of shoulders 211, the contact area between the pulley 300 and the pulley slip 2 can be increased, so as to increase the friction force between the pulley 300 and the pulley slip 2, thereby ensuring that the pulley slip 2 is always fastened on the pulley 300, and preventing the product from being damaged and the personnel from being injured after slipping.

In some preferred embodiments, referring to fig. 1 to 3, the number of the wheel slips 2 is two, the sleeve 3 formed by the two wheel slips 2 after being fastened has two first connecting ends 31, the shoulder rods 4 are also two, the jack base 1 has two second connecting ends 11, and two ends of each shoulder rod 4 are detachably connected between the first connecting end 31 and the second connecting end 11 which are oppositely arranged.

Of course, in other embodiments, the number of the wheel pulling slips 2 may also be three, four or other numbers, correspondingly, the number of the shoulder rods 4 may also be three, four or other numbers, and the number of the second connecting ends 11 of the jack base 1 may also be three, four or other numbers, which is not limited herein, the buckling positions of two adjacent wheel pulling slips 2 can form the first connecting ends 31 of the sleeves 3, and the shoulder rods 4 are detachably connected at the first connecting ends 31. By adopting the design, the adaptability of the product can be improved on the one hand, and the load transmission can be facilitated on the other hand, so that the damage of the structure at the joint is avoided.

Further, referring to fig. 2 and fig. 3, each of the two wheel pulling slips 2 has a semicircular sleeve 22 and two connecting plates 23 connected to two sides of the semicircular sleeve 22, after the two wheel pulling slips 2 are fastened, the two semicircular sleeves 22 are sleeved on the outer portion of the belt pulley 300, and the two connecting plates 23 of the two wheel pulling slips 2, which are oppositely arranged, are attached to each other to form the first connecting end 31. The design structure is simple, the production and the installation are convenient, and the installation time is saved. Furthermore, at least three shoulders 211 capable of being engaged with the plurality of ring grooves 310 on the pulley 300 are provided at intervals on the inner wall of the semicircular sleeve 22 along the axial direction of the pulley 300.

In some embodiments, referring to fig. 6 and 7, the jack base 1 has a fixing block 12 and a rod 13 penetrating the fixing block 12, the fixing block 12 is provided with an installation groove 121 capable of accommodating the jack 5, and two ends of the rod 13 form two second connection ends 11.

The mounting groove 121 is formed in the fixing block 12 to position the jack 5 during mounting, so that the jack 5 is prevented from being inclined, and the situation that the jack 5 is unevenly transferred to the motor shaft 200 to damage the motor shaft 200 due to uneven load is avoided.

Further, referring to fig. 1, fig. 4 and fig. 5, two ends of the shoulder rod 4 are respectively provided with a mounting hole 41, and the mounting hole 41 can be sleeved on the first connecting end 31 or the second connecting end 11. Therefore, when in use, the sleeve 3 and the jack base 1 can be connected into a whole only by inserting the first connecting end 31 and the second connecting end 11 into the mounting holes 41 at the two ends of the shoulder rod 4 respectively, so that the structure is simpler and the assembly is more convenient.

In some embodiments, referring to fig. 1 and 8, the jack 5 has a hydraulic cylinder 51 and a piston rod 52 telescopically disposed in the hydraulic cylinder 51, the hydraulic cylinder 51 abuts on the jack base 1, and the piston rod 52 can abut on the motor shaft 200 through the force-transmitting nipple 400.

When the motor shaft is used, the piston rod 52 in the hydraulic cylinder 51 continuously extends, so that the piston rod 52 abuts against the force transmission short section 400, the load is transmitted to the motor shaft 200 through the force transmission short section 400, the damage caused by the fact that the load is directly transmitted to the motor shaft 200 is avoided, and the service life of a product is prolonged.

Further, the hydraulic cylinder 51 can be connected to an external hydraulic cylinder 54 through a connecting line 53, and the external hydraulic cylinder 54 is provided with a plunger 55 and a force-applying rod 56 connected to the plunger 55. The hydraulic cylinder 51 is connected with the external hydraulic cylinder 54 through the connecting pipeline 53, the size of the hydraulic cylinder 51 can be greatly reduced, the installation space of the hydraulic cylinder 51 is saved, and meanwhile, the boosting process is transferred to the position near the hydraulic cylinder 51, so that the construction of operators is facilitated. Preferably, the connecting line 53 is a high pressure hose.

In some preferred embodiments, the jack base 1 is a 45 steel jack base 1, the wheel slips 2 are 45 steel wheel slips 2, and the shoulder bar 4 is a 45 steel shoulder bar 4.

Furthermore, the whole of the shoulder rod 4 and the jack base 1 is subjected to quenching tempering treatment at 840 ℃, and the surface is blackened and subjected to corrosion prevention treatment, so that the quality and the performance of the grab hook are more stable, and the grab hook is more favorable for eliminating potential safety hazards such as injury to operators due to accidental collapse and flying of the grab hook.

The structure of the above embodiment, whether made of 45 steel or treated by a special process, is to ensure the structural strength of each component during the disassembly of the pulley 300. Of course, each of the above components may be made of other materials, as long as the tensile strength of the jack base 1, the wheel pulling slips 2 and the shoulder rod 4 is not less than 600MPa, and the yield strength of the jack base 1, the wheel pulling slips 2 and the shoulder rod 4 is not less than 355MPa, which is within the protection scope of the present invention.

The operation of the pulley extractor 100 is described as follows:

buckling the two pulley slips 2 on the belt pulley 300, so that the convex shoulders 211 of the pulley slips 2 are meshed with the annular grooves 310 on the belt pulley 300, and buckling the two pulley slips 2 to form a sleeve 3;

then, the first connecting end 31 of the sleeve 3 and the second connecting end 11 of the jack base 1 are connected into a whole by using the shoulder rod 4;

connecting a hydraulic cylinder 51 with an external hydraulic cylinder 54 by using a connecting pipeline 53, sequentially placing the hydraulic cylinder 51 and a force transmission short section 400 between a jack base 1 and a motor shaft 200, wherein the hydraulic cylinder 51 is abutted against the jack base 1, the force transmission short section 400 is abutted against the motor shaft 200 (the hydraulic cylinder 51 and the force transmission short section 400 are positioned in a space formed between two shoulder rods 4), and then fixing the hydraulic cylinder 51 and the force transmission short section 400 by applying force;

finally, the operator holds the force application rod 56 and presses up and down, and at this time, the liquid externally connected with the hydraulic cylinder 54 is delivered to the hydraulic cylinder 51 through the connecting pipeline 53, so that the piston rod 52 of the hydraulic cylinder 51 gradually rises and abuts against the force application nipple 400 until the belt pulley 300 is pulled off from the motor shaft 200, and the detachment work of the belt pulley 300 is completed.

The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. A pulley puller, comprising:

a jack base;

the pulley pulling slip comprises at least two pulley pulling slips, wherein the at least two pulley pulling slips can be buckled to form a sleeve, and the sleeve can be sleeved on a belt pulley positioned on a motor shaft;

at least two shoulder rods, wherein two ends of each shoulder rod are detachably connected between the jack base and the sleeve;

the jack is abutted between the jack base and the motor shaft.

2. The pulley extractor as claimed in claim 1, wherein the pulley slip has a groove capable of being engaged with the pulley, the inner wall of the groove has a plurality of shoulders spaced along the axial direction of the pulley, and the plurality of shoulders are capable of being engaged with the plurality of grooves on the pulley.

3. The pulley puller according to claim 1 or 2, wherein the number of the pulley slips is two, the sleeve formed by the two pulley slips after being fastened has two first connecting ends, the number of the shoulder rods is two, the jack base has two second connecting ends, and two ends of each shoulder rod are detachably connected between the first connecting end and the second connecting end which are oppositely arranged.

4. The pulley puller according to claim 3, wherein each of the two pulley slips has a semicircular sleeve and two connecting plates connected to two sides of the semicircular sleeve, after the two pulley slips are fastened, the two semicircular sleeves are sleeved outside the pulley, and the two connecting plates of the two pulley slips, which are oppositely arranged, are attached to each other to form the first connecting end.

5. The pulley extractor as claimed in claim 4, wherein the inner wall of the semi-circular sleeve is provided with at least three shoulders capable of engaging with the plurality of grooves on the pulley at intervals along the axial direction of the pulley.

6. The pulley puller according to claim 3, wherein the jack base has a fixing block and a rod member penetrating the fixing block, the fixing block is provided with an installation groove capable of accommodating the jack, and two ends of the rod member form the second connection ends.

7. The pulley puller according to claim 3, wherein the shoulder rod has mounting holes at both ends thereof, and the mounting holes are capable of being fitted over the first connecting end or the second connecting end.

8. The pulley extractor as claimed in claim 1, wherein the jack has a hydraulic cylinder and a piston rod telescopically disposed in the hydraulic cylinder, the hydraulic cylinder abuts against the jack base, and the piston rod can abut against the motor shaft through a force-transmitting nipple.

9. The pulley puller according to claim 8, wherein the hydraulic cylinder is connectable to an external hydraulic cylinder through a connecting line, and the external hydraulic cylinder is provided with a plunger and a force applying rod connected to the plunger.

10. The pulley puller of claim 1, wherein the jack base is a 45 steel jack base, the wheel pulling slips are 45 steel wheel pulling slips, and the shoulder bar is a 45 steel shoulder bar.