Plateau belt pumping unit brake assembly

Abstract

The utility model relates to a kind of plateau belt pumping unit brake assembly, including brake cam and connecting rod steering arm and brake pull rod hook head installed in handle bottom plate, the height of cam protrusion in brake cam is increased by 1cm or more;The length of connecting rod steering arm is increased according to the height of cam protrusion;The length of brake pull rod hook head is increased according to the height of cam protrusion;Handle bottom plate tail increases a handle bolt fixing hole two.By the above improvement, plateau pumping unit brake assembly is more easily operated, meets the requirement of safety environmental protection.The utility model is low in modification cost, meets the requirement of benefit production.Increase brake stroke, brake shoe controllable operation range increases, improve brake quality, prolong the service life of brake shoe, reduce the workload of brake shoe replacement.Workers' labor intensity is reduced, labor efficiency is improved, and production cost is reduced.

Description

Technical Field

[0001] This utility model relates to a braking device for high-altitude oil pumping units in the field of oil extraction, and more particularly to a braking assembly for a high-altitude belt-driven oil pumping unit. Background Technology

[0002] High-altitude belt-driven pumping units are the main production equipment in oilfields. These units, hereinafter referred to as high-altitude units, require well shutdown and brake engagement during operation and maintenance to provide safe and reliable control for other tasks. Due to the heavy load on high-altitude units, the brake pads in the braking assembly experience high load and rapid wear during well shutdown and belt control. The short travel of the brake slide in the cam of the high-altitude unit's brake assembly, coupled with the small gap between the brake pads and the brake disc after brake release, easily leads to brake pad wear. Therefore, brake pad wear often results in brake failure, necessitating brake pad replacement to ensure normal operation. Currently, the high-altitude unit's braking assembly faces the following problems: First, brake pad wear and brake failure, coupled with excessively high belt conveyor speeds, can damage the gearbox gears, shortening its lifespan and even causing complete gearbox failure. Second, if the braking assembly malfunctions, replacing the brake pads affects the on-site construction progress. Third, frequent brake pad replacements not only increase production costs but also the workload of employees.

[0003] To extend the service life of brake pads, increase braking stroke, reduce the workload of replacing brake pads, improve braking control, ensure safe braking, avoid adverse consequences caused by brake pad failure, control production costs, and reduce the labor intensity of personnel, it is necessary to improve the brake assembly of the high-altitude belt-driven oil pump.

[0004] A search revealed the following patents related to high-altitude pumping unit brake assemblies: Patent application number CN202020814864.8 discloses a pumping unit brake device, comprising a fixed plate disposed at the end of the pumping unit shaft but not in contact with the shaft. A brake wheel is coaxially fixed to the end of the shaft. Two clamps are rotatably disposed on the fixed plate, encircling the outside of the brake wheel. Brake pads are detachably fixed inside the clamps. Connecting ears extend from the free ends of the clamps. A clamping block is slidably disposed on the fixed plate, having two positions: vertical and horizontal. When the clamping block is in the vertical position, its end is outside the connecting ears. Sliding the clamping block brings the two connecting ears closer together. When the clamping block is in the horizontal position, it disengages from the connecting ears. A drive device for controlling the sliding of the clamping block is provided on the back of the fixed plate. This effectively solves the problems of long maintenance time and reduced oil production efficiency associated with pumping unit brake devices.

[0005] However, the aforementioned patented technology is applicable to the rapid replacement of brake pads in beam pumping units, but not to extending the service life of brake pads in high-altitude pumping units, increasing the braking stroke, or improving the reliability of high-altitude brake assemblies.

[0006] Patent application CN200610045436.8 discloses a fast braking device for a vertical pumping unit's balancing mechanism, comprising a connecting plate, a balancing plate, a balancing beam, connecting rods, a capture frame, guide blocks, brake wire ropes, sliding wedges, a balancing box, a spring seat, a support plate, a seat plate, a pull rod, a pin, a spring, connecting bolts, and nuts. The lower center of the balancing beam and the center of the balancing plate are connected to the upper end of the pull rod via pins. The two ends of the balancing plate are connected to the lower ends of two symmetrical connecting plates via pins. The upper ends of the two symmetrical connecting plates are connected to the upper ends of two symmetrical connecting rods via pins. The lower ends of the two connecting rods are connected to two symmetrical sliding wedges via universal joints. The outer sides of the sliding wedges are fastened to symmetrical wire ropes fixed on the upper and lower sides of the pumping unit frame. Guide blocks are symmetrically arranged on the capture frame, and the sliding wedges slide within the guide blocks. The lower end of the pull rod is connected to a spring mechanism fixed in the center of the balancing box via a support plate and nuts.

[0007] However, the aforementioned patented technology is applicable to electric drum pumping units and can solve problems caused by broken or detached polished rods, broken braids, or slipped polished rod clips leading to free fall of the balance box. It is not applicable to extending the service life of brake pads in high-altitude pumping units, increasing brake stroke, or improving the reliability of high-altitude brake assemblies. Summary of the Invention

[0008] The purpose of this invention is to provide a brake assembly for high-altitude belt-driven pumping units that can extend the service life of brake pads, increase braking stroke, reduce the workload of replacing brake pads, and improve braking control. This reduces well downtime, controls production costs, and lowers the labor intensity of operators.

[0009] The technical solution of this utility model is: a brake assembly for a high-altitude belt-driven oil pump, including a brake cam, a connecting rod steering arm, and a brake lever hook installed in the crank handle base plate, wherein: the height of the cam protrusion in the brake cam is increased by more than 1cm; the length of the connecting rod steering arm is increased according to the height of the cam protrusion; the length of the brake lever hook is increased according to the height of the cam protrusion; and a crank handle bolt fixing hole is added to the tail of the crank handle base plate.

[0010] Preferably, the height of the cam protrusion is increased by 2cm, and the brake slide formed by the cam protrusion in the brake cam grows together with the cam protrusion; the surface of the brake slide is provided with a ceramic coating.

[0011] Preferably, the crank handle base plate has a zigzag structure, and the plate with a brake cam and a bolt fixing hole is connected by an inclined plate, and the included angle α between the plates at both ends of the inclined plate is 120 degrees.

[0012] Preferably, the length of the connecting rod steering arm is increased by 5cm.

[0013] Preferably, the number of hook connection holes for the brake link fixed in the connecting rod steering arm is increased by two.

[0014] Preferably, the length of the brake lever hook is increased by 5cm.

[0015] Preferably, the number of spline teeth on the external spline of the brake cam and the number of internal spline teeth on the crank base plate are increased by more than three.

[0016] Preferably, the sliding pin that abuts against the brake slide in the brake cam has a sliding pin lubrication groove on both sides of the sliding pin body that communicates with the sliding pin end of the outer end of the sliding pin, through which grease can be injected.

[0017] Preferably, the sliding pin lubrication grooves on both sides of the sliding pin have a groove depth greater than 1.5 mm, a groove width greater than 0.8 mm, and a groove length greater than 2 cm; the length of the sliding pin lubrication groove is less than the length of the sliding pin.

[0018] Preferably, a ceramic coating is provided on the outer surface of the semi-circular ends of the sliding pins at both ends.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is a braking device that can effectively extend the braking distance of high-altitude vehicles and improve the braking utilization rate. Compared with the original braking assembly, this utility model has made the following improvements: 1. Increase the height of the cam lobe by 2 cm. In conjunction with the increased height of the cam lobe, the length of the connecting rod steering arm and brake lever hook is increased by 5 cm.

[0020] 2. A 2mm ceramic coating is applied to the surface of the brake slide. The ceramic coating is wear-resistant and prevents jamming.

[0021] 3. By increasing the height of the cam convexity, the brake stroke is effectively increased. The brake stroke is the travel distance or distance that the sliding pin travels in the brake slide during braking.

[0022] 4. The number of spline teeth in the external spline of the brake cam and the internal spline in the crank handle base plate that mates with it has been increased from 12 to 16 teeth respectively. In cases where the fit between the external spline of the brake cam and the internal spline in the crank handle base plate is improper, or the brake travel is unsuitable, the position of the brake cam can be adjusted using the external spline of the brake cam and the internal spline of the crank handle base plate. This increases the number of spline teeth, expands the adjustment range, and simplifies operation.

[0023] 5. Add a bolt fixing hole to the original hole at the end of the crank handle base plate to facilitate connection and adjustment with the rocker arm clamp.

[0024] Meanwhile, because the entire brake assembly is installed on the high-altitude machine for extended periods, infrequent use can lead to issues such as the sliding pin getting stuck or poor sliding during braking. Maintaining the sliding pin requires removing the entire high-altitude machine brake assembly, which is labor-intensive, results in prolonged downtime, and impacts oil well production efficiency. This invention also makes corresponding improvements to the sliding pin installed within the assembly. The improvements are as follows: 6. Apply a ceramic coating to the semi-circular ends of the sliding pin at both ends.

[0025] 7. Make a lubrication groove on each side of the sliding pin to lubricate the sliding pin and the parts in contact with it, so as to prevent them from getting stuck and sliding poorly.

[0026] 8. The length of the lubrication grooves on both sides of the sliding pin is less than the length of the sliding pin body. They only connect with the outer end of the sliding pin and do not connect with the inner end of the sliding pin, so they will not contaminate the brake pads.

[0027] Through the above improvements, the braking assembly of the high-altitude oil pumping unit is easier to operate and meets safety and environmental protection requirements. The modification cost of this utility model is low, meeting the requirements of efficient production. The increased braking stroke expands the controllable operating range of the brake pads, improving braking quality, extending the service life of the brake pads, and reducing the workload of replacing brake pads.

[0028] Meanwhile, it enables maintenance of the sliding pin without disassembling the brake assembly, allowing for convenient and quick maintenance of the brake sliding pin and extending the service life of the brake assembly. It prevents the sliding pin from jamming, improves oil well production rate, reduces the workload of replacing brake pads and disassembling for lubrication and maintenance, reduces the labor intensity of employees, improves labor efficiency, and lowers production costs. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the brake assembly of a belt-driven oil pump in high-altitude areas.

[0030] Figure 2 for Figure 1 Front view of the schematic diagram of the brake cam and crank base plate structure.

[0031] Figure 3 for Figure 2 A bottom view.

[0032] Figure 4 for Figure 1 A schematic diagram of the sliding pin structure.

[0033] In the diagram: 1. Brake cam; 2. Cam protrusion; 3. Crank handle base plate; 4. Brake crank handle center hole; 5. Brake slide; 6. Inclined plate; 7. Crank handle bolt fixing hole one; 8. Crank handle bolt fixing hole two; 9. Brake cam external spline; 10. Sliding pin; 11. Brake seat body; 12. Brake pad; 13. Brake pad fixing pin; 14. Brake seat fixing hole; 15. Brake spring; 16. Brake seat lead screw; 17. Sliding pin end; 18. Connecting rod steering arm; 19. Hook connection hole; 20. Brake lever hook; 21. Rocker arm clamp plate; 22. Rocker arm body; 23. Sliding pin lubrication groove; 24. Reversing shaft; 25. Detailed Implementation

[0034] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of this utility model. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] See Figures 1-4 A brake assembly for a high-altitude belt-driven oil pump includes a brake cam 1, a connecting rod steering arm 19, and a brake lever hook 21, all mounted in a crank handle base plate 3. The cam protrusion 2 in the brake cam 1 is increased in height by more than 1 cm. The length of the connecting rod steering arm 19 is increased according to the height of the cam protrusion 2. The length of the brake lever hook 21 is increased according to the height of the cam protrusion 2. A crank handle bolt fixing hole 8 is added to the tail of the crank handle base plate 3, which increases the adjustment range between the crank handle and the rocker arm clamp 22, saving time and effort.

[0038] In order to extend the service life of brake pads 12, increase the brake stroke, reduce the workload of replacing brake pads 12, and improve the braking control effect, this utility model improves the original brake assembly by modifying the following components: The height of the cam protrusion 2 of the brake cam 1 is increased by more than 1cm. Based on the increased height of the cam protrusion 2, the length of the connecting rod steering arm 19, the length of the brake lever hook 21, and the number of crank bolt fixing holes in the crank base plate 3 are increased. The number of bolt fixing holes has been increased from only one crank bolt fixing hole 7 to one crank bolt fixing hole 8, which increases the adjustment range and saves time and effort.

[0039] As the height of the cam protrusion 2 increases, the stroke of the brake slide 5 formed by the cam protrusion 2 in the brake cam 1 is also extended accordingly. This results in a corresponding extension and increase in the braking stroke of the high-altitude pumping unit assembly, which increases the gap between the brake pad 12 and the brake disc. This reduces the wear on the brake pad 12 in the brake assembly, ensures the safe operation of the brake assembly, and avoids all adverse consequences caused by brake assembly failure due to wear on the brake pad 12.

[0040] In this invention, the inner end of the sliding pin 10 abuts against the brake pad 12 in the brake seat 11, and the outer end abuts against the brake slide rail 5 in the brake cam 1. The two brake pads 12 are fixed to both sides of the brake seat body 11 by brake tension spring 14 and brake spring 16 respectively. The left brake pad 12 is adjusted and tightened by the fixing pin 13. The brake crank mainly consists of a crank base plate 3 with brake cam 1, a rocker arm clamp 22, a rocker arm body 23, a brake lever hook 21, and a reversing shaft 25. After improvement, when the brake is released, there is a gap greater than 2mm between the brake pad 12 and the brake disc on one side, which can effectively reduce the wear of the brake pad 12 and extend its service life. The brake assembly is fixed to the brake protection plate of the high-altitude oil pumping unit by fixing screws and fixing screw sleeves installed in the brake seat fixing holes 15.

[0041] Based on the above embodiment one, the present invention also has the following embodiments: In a preferred embodiment, the height of the cam protrusion 2 is increased by 2 cm, and the brake slide 5 formed by the cam protrusion 2 in the brake cam 1 grows along with the cam protrusion 2; a ceramic coating is applied to the surface of the brake slide 5. The structure of the cam protrusion 2 and the brake slide 5 remains unchanged, only increasing in height and length, and a ceramic coating is applied to the surface of the brake slide 5 to enhance its wear resistance, anti-jamming, and corrosion resistance.

[0042] In a preferred embodiment, the crank handle base plate 3 has a zigzag structure. The crank handle base plate 3 has a brake cam 1 and a plate with bolt fixing holes 8 connected by an inclined plate 6, and the included angle α between the plates at both ends of the inclined plate 6 is 120 degrees. This configuration facilitates fixed connection with the rocker arm clamp 22 in the brake assembly. The rocker arm consists of the rocker arm clamp 22 and the rocker arm body 23.

[0043] In a preferred embodiment, the length of the connecting rod steering arm 19 is increased by 5cm, which, in conjunction with the increased height of the cam protrusion 2, effectively increases the rotation radius of the connecting rod steering arm 19, thereby effectively increasing the stroke of the reversing shaft 25 and the rocker arm body 23.

[0044] In a preferred embodiment, the number of hook connection holes 20 for the brake link fixed in the connecting rod steering arm 19 is increased by two. The number of hook connection holes 20 increases from one to three, providing multiple stroke adjustments and options for the brake link.

[0045] In a preferred embodiment, the length of the brake lever hook 21 is increased by 5cm, which, in conjunction with the increased height of the cam protrusion 2, effectively accommodates the working radius of the connecting rod steering arm 19. The main purpose of the above improvement is to increase the brake stroke and widen the gap between the brake pad 12 and the brake disc of the high-altitude vehicle.

[0046] In a preferred embodiment, the number of spline teeth on the external spline 9 of the brake cam 1 and the number of spline teeth on the internal spline teeth in the crank base plate 3 are increased by more than three. The engagement between the external spline 9 of the brake cam 1 and the internal spline teeth in the crank base plate 3 is increased from the original 12 teeth to 15 teeth or even 16 teeth, correspondingly increasing the number of teeth on both the external spline 9 and the internal spline teeth in the crank base plate 3, achieving precise adjustment and expanding the adjustment range. When the engagement between the external spline 9 of the brake cam and the internal spline teeth in the crank base plate 3 is improper, or the brake stroke is unsuitable, the position of the brake cam 1 can be adjusted using the external spline 9 of the brake cam to ensure proper engagement between the external spline 9 and the internal spline teeth in the crank base plate 3. Increasing the number of spline teeth expands the adjustment range. When one side of the brake slide 5 in the brake cam 1 is worn, the brake slide 5 on the other side can be adjusted by adjusting the external spline 9 of the brake cam.

[0047] In a preferred embodiment: the sliding pin 10, which abuts against the brake slide rail 5 in the brake cam 1, has sliding pin lubrication grooves 24 on both sides of its pin body that communicate with the sliding pin end 18 at the outer end of the sliding pin 10. Lubricating grease can be injected through these sliding pin lubrication grooves 24. Figure 4Lubricating the brake slide 5, sliding pin 10, and brake seat screw 17 installed in the brake assembly can solve the problem of the sliding pin 10 getting stuck or sliding poorly due to infrequent use of the brake assembly. Maintaining the sliding pin 10, however, requires removing the entire high-altitude machine brake assembly, disassembling the rocker arm body 23, brake cap, brake cam 1, brake pads 12, and other components before lubricating the sliding pin 10. This involves a large workload, prolonged downtime of the pumping unit, and negatively impacts oil well production and efficiency.

[0048] In a preferred embodiment, the sliding pin lubrication grooves 24 on both sides of the sliding pin 10 have a groove depth greater than 1.5 mm, a groove width greater than 0.8 mm, and a groove length greater than 2 cm; the length of the sliding pin lubrication grooves 24 is less than the length of the sliding pin 10. Since the length of the sliding pin lubrication grooves 24 is less than the length of the sliding pin 10 body and is not connected to the inner end of the sliding pin 18, the phenomenon of grease leakage and contamination of the brake pads 12 can be prevented.

[0049] In a preferred embodiment, a ceramic coating is applied to the outer surface of the semi-circular ends 18 of the sliding pins 10 at both ends. The semi-circular ends 18 of the sliding pins 10 are in direct contact with the brake track 5. The ceramic coating, in conjunction with the ceramic coating on the surface of the brake track 5, further enhances its wear resistance, anti-jamming properties, and corrosion resistance, thus extending its service life.

[0050] The brake crank center hole 4 in the brake cam 1 is installed on the brake seat screw 17, and a flower cap is installed on the brake seat screw 17 outside the brake cam 1. The brake slide 5 is in direct contact with the sliding pin 10 in the brake seat 11. When replacing the belt or during routine well shutdown, grease can be added to the sliding pin lubrication groove 24 through a syringe, rubber tube, etc., so that the sliding pin 10 and the parts in contact with it are lubricated and maintained.

[0051] When the high-altitude machine needs to be stopped for operation, the brake crank, which consists of the brake cam 1 and the crank base plate 3 in the brake assembly, is activated. The sliding pin 10 moves from the bottom to the top of the brake slide 5. The brake cam 1 pushes the sliding pin 10 forward. The sliding pin 10 is installed in the sliding pin groove of the brake seat body 11. The other end of the sliding pin 10 pushes the brake pad 12 forward, so that the brake pad 12 is tightly engaged with the brake disc of the high-altitude machine, thereby achieving the purpose of braking the high-altitude machine.

[0052] The embodiments described above are merely typical examples, but the present invention is not limited to these embodiments. Those skilled in the art can make modifications without departing from the spirit and teachings of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the inventive spirit and concept of the present invention should be included within the protection scope of the present invention. Therefore, the protection scope is not limited to the above description.

Claims

1. A brake assembly for a high-altitude belt-driven oil pumping unit, comprising a brake cam mounted in a crank handle base plate, a connecting rod steering arm, and a brake lever hook, characterized in that, The height of the cam protrusion in the brake cam is increased by more than 1cm; the length of the connecting rod steering arm is increased according to the height of the cam protrusion; the length of the brake lever hook is increased according to the height of the cam protrusion; and a second crank bolt fixing hole is added to the tail of the crank base plate.

2. The high-altitude belt-driven oil pump brake assembly as described in claim 1, characterized in that, The height of the cam protrusion is increased by 2cm, and the brake slide formed by the cam protrusion in the brake cam grows along with the cam protrusion; the surface of the brake slide is provided with a ceramic coating.

3. The high-altitude belt-driven oil pump brake assembly as described in claim 2, characterized in that, The crank handle base plate has a zigzag structure. The crank handle base plate is provided with a brake cam and a plate with bolt fixing holes 2. The plate is connected by an inclined plate and the included angle α between the plates at both ends of the inclined plate is 120 degrees.

4. The high-altitude belt-driven oil pump brake assembly as described in claim 1, characterized in that, The length of the connecting rod steering arm has been increased by 5cm.

5. The high-altitude belt-driven oil pump brake assembly as described in claim 4, characterized in that, Two more hook connection holes have been added to the brake linkage fixed in the connecting rod steering arm.

6. The high-altitude belt-driven oil pump brake assembly as described in claim 5, characterized in that, The length of the brake lever hook has been increased by 5cm.

7. The high-altitude belt-driven oil pump brake assembly as described in claim 3, characterized in that, The number of spline teeth on the external spline of the brake cam and the number of internal spline teeth on the crank base plate are increased by more than 3 each.

8. The high-altitude belt-driven oil pump brake assembly as described in claim 7, characterized in that, The sliding pin, which abuts against the brake slide in the brake cam, has a sliding pin lubrication groove on both sides of the sliding pin body that communicates with the sliding pin end of the outer end of the sliding pin, through which grease can be injected.

9. The high-altitude belt-driven oil pump brake assembly as described in claim 8, characterized in that, The sliding pin lubrication grooves on both sides of the sliding pin have a groove depth greater than 1.5mm, a groove width greater than 0.8mm, and a groove length greater than 2cm; the length of the sliding pin lubrication groove is less than the length of the sliding pin.

10. A high-altitude belt-driven oil pump brake assembly as described in claim 9, characterized in that, A ceramic coating is applied to the outer surface of the semi-circular ends of the sliding pins at both ends.

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