A safety parking device for a pumping unit reducer

Abstract

The utility model discloses a safe parking device for oil pumping unit speed reducer, including brake wheel, brake shoe, brake band, first group of pull rod system and second group of connecting rod system, first group of pull rod system includes screw rod, washer, dead screw rod, pull plate, and the bottom of both sides brake shoe is set up to the screw rod, and the spacing between brake shoe and brake wheel is limited to one side of screw rod through double -nut spacing, and the upper portion of one end of pull plate is connected to the other side of screw rod through pin shaft no.

Description

Technical Field

[0001] This utility model relates to the field of parking technology for oil pumping unit reducers, and specifically to a safety parking device for oil pumping unit reducers. Background Technology

[0002] The pumping unit stops by relying on a braking device installed on its reducer. The reducer typically uses an external clamping brake or an internal tensioning brake. The braking principle is: pull down ( Figure 1 (Item 23) The brake lever causes friction between the brake pads and the brake wheel, thereby stopping the pumping unit. To ensure safe parking of the pumping unit, it is generally done in ( Figure 1 Serial number 9) Four or six grooves are machined on the brake wheel, which is tightened and loosened slowly. Figure 1 Serial number 23) Brake pull plate, adjust the pumping unit stop position, and pull the brake hook ( Figure 1 Item 6) can be inserted into the groove of the brake wheel to achieve safe parking in 4 or 6 positions; during the use of the pumping unit, only 4 or 6 positions can be safely parked, other positions can stop but cannot be safely parked; the pumping unit in actual use cannot achieve more convenient positions for stopping for maintenance, stroke adjustment or troubleshooting; the existing safe parking cannot meet the usage requirements; if the pumping unit is stopped by brake friction alone without safe parking, there is a very large safety hazard when stopping for maintenance, stroke adjustment or troubleshooting.

[0003] Therefore, a safety parking device for a pumping unit reducer is needed. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a safety parking device for a pumping unit reducer. The purpose is to reliably fix the suspension point (donkey head) of the pumping unit in a certain position when the unit is stopped for maintenance, stroke adjustment, or troubleshooting, preventing it from moving due to downhole load (the weight of the sucker rod string) or wind force, thus ensuring the safety of personnel and equipment.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a safety parking device for a pumping unit reducer, comprising a brake wheel, brake shoes, a brake band, a first set of tie rod system and a second set of linkage system; The brake wheel is mounted on the high-speed shaft of the reducer; Brake pads are wrapped around the inner ring of the brake wheel on both sides. The inner surface of the brake pads is lined with a brake band of asbestos rubber or composite material with a high coefficient of friction. There is a certain gap between the brake band and the brake wheel to ensure that the high-speed shaft of the reducer can rotate freely. The first set of tie rods is located below the brake shoes. The first set of tie rods includes a screw, a washer, a dead screw, and a tie plate. The screw passes through the bottom of both brake shoes. One side of the screw limits the distance between the brake shoe and the brake wheel through a double nut. The other side of the screw is connected to the upper part of one end of the tie plate through a pin. A washer is set in the middle of the screw. Springs are sleeved on the screw on both sides of the washer. The springs abut against the washer and the brake shoe. The dead screw is set below the screw. One side of the dead screw passes through the brake shoe and limits the distance between the brake shoe and the brake wheel through a double nut. The other side of the dead screw is connected to the lower part of one end of the tie plate. The end face of the tie plate near the dead screw is connected to the brake shoe through a pin.

[0006] The second linkage system has ratchet teeth evenly distributed on the outer ring of the brake wheel. The second linkage system is rotatably mounted above the ratchet teeth. By engaging with the ratchet teeth at different positions, the second linkage system is used to park the pumping unit at a designated position.

[0007] Preferably, the second linkage system includes a linkage, the bottom of which is provided with an extended brake hook, which is engaged with a ratchet tooth.

[0008] Preferably, the outer surface of the brake shoes on both sides is configured as a brake shoe housing, which is fixedly connected to the reducer. The top of the brake shoe housing is connected to the connecting rod and the brake shoes on both sides by a pin. The connecting rod is configured to be connected to the outer surface of the brake shoe housing and engaged with the ratchet teeth.

[0009] In summary, this utility model provides a safety parking device for a pumping unit reducer. To address the issue of safe parking in more locations during pumping unit maintenance, inspection, or measurement, we replace the outer ring of the brake wheel with evenly distributed ratchet teeth. An extended brake hook with ratchet teeth engages with different ratchet teeth on the brake wheel to achieve safe parking in more locations, allowing the pumping unit to be stopped at designated positions for maintenance, stroke adjustment, or troubleshooting. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the oil pumping unit braking device of this utility model; Figure 2 This is a schematic diagram of the structure of the extended brake hook of this utility model, in which the ratchet tooth engages with the ratchet tooth; In the diagram: Brake band 10, screw 12, dead screw 13, spring 16, washer 17, pin 2 19, pin 1 21, pull plate 23, ratchet tooth 24, extended brake hook 6, connecting rod 61, brake shoe 7, brake shoe housing 71, pin 3 72, brake wheel 9. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] like Figures 1 to 2 As shown: The pumping unit braking device is a critical safety device used to reliably fix the suspension point (donkey head) of the pumping unit in a certain position during shutdown maintenance, stroke adjustment, or troubleshooting, preventing it from moving due to downhole load (the weight of the sucker rod string) or wind force, thus ensuring the safety of personnel and equipment.

[0013] Braking system components: The braking system of an oil pumping unit reducer is typically an external clamping structure, mainly consisting of the following parts: Brake wheel (brake hub): A wheel mounted on the high-speed shaft (input shaft) of the reducer.

[0014] Brake pads: A strip-shaped material wrapped around the outer edge of the brake wheel, with the inner surface lined with asbestos rubber or composite materials with a high coefficient of friction.

[0015] When the oil pumping unit is working normally, there is a certain gap between the brake band and the brake wheel (the brake gap, which needs to be adjusted regularly) to ensure that the high-speed shaft of the reducer can rotate freely.

[0016] Brake lever system: A linkage mechanism that transmits and amplifies the operating force. It is a device used to control braking action, typically located near the base of the pumping unit for easy access. It consists of a handle, connecting rod, pull rod, screw, deadbolt, spring, and connecting pin.

[0017] (1) The braking process (braking) implemented through the technical structure of this patent is as follows: When the machine needs to be stopped and braked, the operator will pull the brake operating handle, which is connected to the front end of the pull plate 23. Pulling the pull plate 23 downward causes the front end of the pull plate 23 to move downward, driving the screw 12 forward through the first pin 21, and pushing the dead screw 13 backward through the second pin 19. This causes the brake shoe assemblies on both sides to begin to retract. The brake shoe assembly includes brake shoes 7 and brake bands 10, which are riveted together. At this time, the spring 16 is compressed, clamping the brake wheel 9. The tightened brake shoes 7 wrap around and lock the brake wheel 9 with the brake band 10 on their inner side. The huge friction between the brake band 10 and the brake wheel 9 locks the high-speed shaft of the reducer.

[0018] Since the motor power is transmitted to the pumping unit crank via a reducer, locking the high-speed shaft means cutting off the entire transmission chain, and the crank and pump head will immediately stop moving. Before the movement stops, the force acting on the brake plate 23 is adjusted to bring the pumping unit to a suitable position.

[0019] After the movement stops, the safety parking handle is pulled down via the second linkage system, which is connected to the front end of the extended brake hook 6. This moves the linkage 61, lowering the extended brake hook 6 and causing the ratchet on the extended brake hook 6 to engage with the ratchet teeth 24 of the brake wheel 9, thus achieving safe parking. The outer circumference of the brake wheel 9 is evenly distributed with ratchet teeth 24. By having the extended brake hook 6 with ratchet teeth engage with different ratchet teeth 24 on the brake wheel, safe parking can be achieved in more positions, allowing the pumping unit to be stopped at designated locations for maintenance, stroke adjustment, or troubleshooting.

[0020] (2) The brake release process implemented through the technical structure of this patent is as follows: Releasing the brakes prepares for starting the pumping unit.

[0021] First, operate the second linkage system, release the safety parking control handle, and lift the extended brake hook 6 so that the ratchet on the extended brake hook 6 disengages from the ratchet tooth 24 of the brake wheel 9, thereby disengaging from the safety parking position.

[0022] Then, operate the first linkage system, release the brake operating handle, and move the front end of the pull plate 23 upward. The compressed spring 16 begins to reset, pushing the brake shoe assemblies on both sides outward, and the brake band 10 disengages from the brake wheel 9. Only then can the motor be started to drive the pumping unit to work normally.

[0023] The embodiments described in this utility model are for illustrative purposes only and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutions that can be conceived by those skilled in the art are all within the protection scope of this utility model.

Claims

1. A safety parking device for a pumping unit reducer, characterized in that, Includes brake wheel (9), brake pads (7), brake band (10), first set of tie rod system and second set of linkage system; Brake wheel (9) is mounted on the high-speed shaft of the reducer; Brake pads (7) are wrapped around the inner ring of the brake wheel (9) on both sides. The inner surface of the brake pads (7) is lined with a brake band (10) of asbestos rubber or composite material with a high coefficient of friction. A certain gap exists between the brake band (10) and the brake wheel (9) to ensure that the high-speed shaft of the reducer can rotate freely. The first set of tie rod system is set below the brake shoe (7). The first set of tie rod system includes a screw (12), a washer (17), a dead screw (13), and a pull plate (23). The screw (12) is set through the bottom of both brake shoes (7). One side of the screw (12) limits the distance between the brake shoe (7) and the brake wheel (9) by double nuts. The other side of the screw (12) is connected to the upper part of one end of the pull plate (23) by a pin (21). A washer (17) is set in the middle of the screw (12). 7) Springs (16) are sleeved on the screws (12) on both sides. The springs (16) abut against the washer (17) and the brake shoe (7). The bottom of the screw (12) is set as a dead screw (13). One side of the dead screw (13) passes through the brake shoe (7) and limits the distance between the brake shoe (7) and the brake wheel (9) by double nuts. The other side of the dead screw (13) is connected to the lower part of one end of the pull plate (23). The end face of the pull plate (23) near the dead screw (13) is connected to the brake shoe (7) by the second pin (19). The second linkage system has ratchet teeth (24) evenly distributed on the outer ring of the brake wheel (9). The second linkage system is rotatably mounted above the ratchet teeth (24). The second linkage system engages with ratchet teeth (24) at different positions to park the pumping unit at a designated position.

2. A safety parking device for a pumping unit reducer according to claim 1, characterized in that, The second linkage system includes a link (61), the bottom of which is configured with an extended brake hook (6), which is engaged with a ratchet tooth (24).

3. A safety parking device for a pumping unit reducer according to claim 2, characterized in that, The outer side of the brake pads (7) on both sides is set as a brake pad housing (71). The brake pad housing (71) is fixedly connected to the reducer. The top of the brake pad housing (71) is connected to the connecting rod (61) and the brake pads (7) on both sides through the pin three (72). The connecting rod (61) is set to be connected to the outside of the brake pad housing (71) and the ratchet tooth (24).

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