Pumping unit pull rod type self-unlocking brake insurance system

Abstract

The present invention relates to a pull rod type self-unlocking brake safety system for an oil pump. The self-unlocking brake safety device is connected to a safety control device, the brake wheel is arranged on a reducer, the self-unlocking brake safety device is movably connected to the brake wheel, and the reducer is connected to a square box; the self-unlocking brake safety device is composed of a brake safety hook, a brake unlocking handle, a reset device and a brake shoe assembly shaft; the brake unlocking handle is composed of a handle and a rotating sleeve, one end of the handle is connected to the safety control device through a connecting shaft pin, the other end of the handle is welded and fixed to the rotating sleeve, and the handle drives the rotating sleeve to rotate around the brake shoe assembly shaft; one end of the brake safety hook is a hook head, and the other end is a rotating shaft with an axial hole; the brake safety hook and the brake unlocking handle are respectively installed on the brake shoe assembly shaft. The present invention realizes the function of the operator controlling the brake device in a safe area to realize mechanized automatic unlocking, which saves time and effort, and also saves the labor cost of unlocking by manpower using tools.

Description

Technical Field

[0001] The invention relates to a pumping unit safety device, in particular to a pull rod type self-unlocking brake safety system for a pumping unit. Background Art

[0002] The beam pumping unit brake currently in service in Jiangsu Oilfield ( Figure 1 ) is a hand-pull type (external or internal support brake shoe) structure. To ensure the reliability of the brake, a self-unlocking brake safety device is set on the brake ring. ( Figure 2 ). The working principle of the self-unlocking brake safety device is that when the brake safety hook is stuck in the dovetail groove of the brake wheel brake ring, the rotation of the brake wheel brake ring is limited, thus achieving the purpose of brake safety. The design of the dovetail groove with narrow top and wide bottom can well engage the brake safety hook, but because the brake mechanism often has the problem of insufficient braking or the brake operation and the elastic deformation of the pull rod mechanism, the brake wheel brake ring will produce a certain rotation, so that the safety hook and the dovetail groove on the brake wheel brake ring produce mutual force, resulting in the safety hook being locked in the dovetail groove and unable to escape. Before restarting the pumping unit, personnel need to approach the brake wheel brake ring of the pumping unit and use tools such as crowbars to unlock the brake safety. As an important equipment for oilfield production, the pumping unit is large, tall and heavy. The uninterrupted rotation of the crank and the pumping rod for the extraction of crude oil in the well make the equipment safety issue extremely important. Therefore, the pumping unit working in the well site has a safety range specified in the design. Within this range, people and animals are not allowed to enter when the pumping unit is working. The start and stop of the oil pump is completely completed by the brake system. Therefore, it is very important to control the braking of the equipment in the safe area of ​​the oil pump. Regarding the brake insurance unlocking problem, our company developed an unlocking device in 2016, applied for a patent, and then promoted and applied it, but it still requires personnel to be close to the oil pump to operate. In order to further improve operational safety, it becomes extremely urgent and necessary to ensure that operators avoid unlockable brake operations in dangerous areas. Therefore, this project is an innovative design and development of oil pump brake insurance systems for Sinopec, PetroChina, etc. to avoid entering dangerous areas. Summary of the invention

[0003] The object of the present invention is to provide a pull rod type self-unlocking brake insurance system for an oil pumping unit which has a simple structure, is self-unlocking, is convenient and labor-saving, and can be controlled from a distance.

[0004] The technical solution of the present invention is: a pull rod type self-unlocking brake insurance system for an oil pumping unit, the insurance system comprising a self-unlocking brake insurance device, an insurance control device, a brake wheel, a reducer, a base and a square box;

[0005] The self-unlocking brake safety device is connected to the safety control device, the brake wheel is arranged on the reducer, the self-unlocking brake safety device is movably connected to the brake wheel, and the reducer is connected to the square box;

[0006] The self-unlocking brake safety device is composed of a brake safety hook, a brake unlocking handle, a reset device and a brake shoe assembly shaft;

[0007] The brake unlocking handle is composed of a handle and a rotating sleeve. One end of the handle is connected to the insurance control device through a connecting shaft pin, and the other end of the handle is welded and fixed to the rotating sleeve. The handle drives the rotating sleeve to rotate around the brake shoe assembly axis.

[0008] One end of the brake safety hook is a hook head, and the other end is provided with an axis hole;

[0009] The brake safety hook and brake release handle are respectively mounted on the brake shoe assembly shaft;

[0010] The end surface of the rotating sleeve is provided with two step protrusions which are matched with the inner surface of the shaft hole of the brake safety hook;

[0011] The shaft hole of the brake safety hook is installed in cooperation with the brake shoe assembly shaft, and the shaft hole is a long slot hole with steps and grooves.

[0012] Preferably, the reset device is a reset spring.

[0013] Preferably, the safety control device is a connecting rod mechanism.

[0014] Preferably, the hook head end of the brake safety hook is movably connected to the brake wheel.

[0015] Preferably, the brake wheel is provided with a brake groove, the hook head end of the brake safety hook can be inserted into the brake groove, and the brake groove is a dovetail groove.

[0016] The beneficial effects of the present invention are as follows: the operator can lightly operate the brake handle of the safety system to remotely pull the brake safety hook stuck in the brake groove out of the clamped state, thereby realizing the self-unlocking function and ensuring that the oil pump can be started in time and safely. At the same time, since one person can operate it, it is not only safe, time-saving and labor-saving, but also saves the labor cost of unlocking with tools by manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art.

[0018] Figure 2 The utility model relates to a self-unlocking brake safety device for a beam pumping unit which cannot realize an automatic unlocking function.

[0019] Figure 3It is a structural schematic diagram of the present invention.

[0020] Figure 4 It is a structural schematic diagram of a self-unlocking brake safety device.

[0021] Figure 5 It is a structural diagram of the brake safety hook.

[0022] Figure 6 It is a structural diagram of the brake release handle.

[0023] Figure 7 Schematic diagram of the initial state of the present invention (unlocked state).

[0024] Figure 8 It is a schematic diagram of the unlocked state of the present invention.

[0025] In the figure, 1 is a self-unlocking brake safety device, 2 is a safety control device, 3 is a brake wheel, 4 is a reducer, 5 is a square box, 6 is a brake safety hook, 7 is a brake unlocking handle, 8 is a reset device, 9 is a brake shoe assembly shaft, 10 is a handle, and 11 is a rotating sleeve. DETAILED DESCRIPTION

[0026] A pull rod type self-unlocking brake insurance system for an oil pumping unit, the insurance system comprising a self-unlocking brake insurance device 1, an insurance control device 2, a brake wheel 3, a reducer 4, a base and a square box 5;

[0027] The self-unlocking brake safety device 1 is connected to the safety control device 2, the brake wheel 3 is arranged on the reducer 4, the self-unlocking brake safety device 1 is movably connected to the brake wheel 3, and the reducer 4 is connected to the square box 5;

[0028] The self-unlocking brake safety device 1 is composed of a brake safety hook 6, a brake unlocking handle 7, a reset device 8 and a brake shoe assembly shaft 9;

[0029] The brake unlocking handle 7 is composed of a handle 10 and a rotating sleeve 11. One end of the handle 10 is connected to the insurance control device 2 through a connecting shaft pin, and the other end of the handle 10 is welded and fixed to the rotating sleeve 11. The handle 10 drives the rotating sleeve 11 to rotate around the brake shoe assembly axis 9.

[0030] One end of the brake safety hook 6 is a hook head, and the other end is provided with an axial hole;

[0031] The brake safety hook 6 and the brake unlocking handle 7 are respectively mounted on the brake shoe assembly shaft 9 .

[0032] The end surface of the rotating sleeve 11 is provided with two step protrusions which are matched with the inner surface of the shaft hole of the brake safety hook 6.

[0033] The axial hole of the brake safety hook 6 is installed in cooperation with the brake shoe assembly shaft 9, and the axial hole is a long slot hole with steps and grooves.

[0034] The reset device 8 is a reset spring, which can restore the brake safety hook 6 and the brake unlocking handle 7 to a centered state after unlocking.

[0035] The safety control device 2 is just a common existing connecting rod mechanism, and its purpose is only to achieve remote control of the movement of the self-unlocking brake safety device 1. The operator pulls the safety control device 2 at the end of the pumping unit base away from the dangerous area of ​​the pumping unit to drive the brake unlocking handle 7 to control the self-unlocking brake safety device 1.

[0036] The hook head end of the brake safety hook 6 is movably connected to the brake wheel 3 .

[0037] The brake wheel 3 is provided with a brake groove, and the hook head end of the brake safety hook 6 can be inserted into the brake groove, and the brake groove is a dovetail groove.

[0038] The working process of the present invention is:

[0039] When the self-unlocking brake safety device 1 is not in the safety state, the two step protrusions at the end surface of the rotating sleeve 11 of the brake unlocking handle 7 are matched with the inner hole surface of the brake safety hook 6 under the action of the reset device 8, so that the rotation center of the brake safety hook 6 coincides with the center of the rotating sleeve 11 of the brake unlocking handle 7 and is coaxial with the brake shoe assembly axis 9 (triple coincidence);

[0040] When the self-unlocking brake safety device 1 enters the safety state, the self-unlocking brake safety device 1, driven by the safety control device 2, clamps the hook head of the brake safety hook 6 into the brake groove of the brake wheel 3, thereby playing a brake safety protection role and maintaining the triple-closing state;

[0041] Self-unlocking brake safety device self-unlocking: when the brake wheel 3 fails to brake due to active braking, or the rear brake wheel 3 rotates slightly for a long time and the hook head of the brake safety hook 6 is stuck in the brake groove of the brake wheel 3, and the brake unlocking handle 7 is not lifted, the hook head of the brake safety hook 6 is in a clamped state and does not move, and still maintains a triple-closed state; when the brake unlocking handle 7 is rotated and continued to be lifted, the two step protrusions on the end face of the rotating sleeve 11 of the brake unlocking handle 7 rotate to the groove of the axial hole of the brake safety hook 6, so that the groove of the rotating hole of the brake safety hook 6 and the step protrusion of the rotating sleeve 11 of the brake unlocking handle 7 form gaps H and K, so that the inner hole (long groove) of the brake safety hook 6 loses the constraint of the interaction force at the brake shoe assembly shaft 9, thereby releasing the interaction force produced by the brake safety hook 6 and the dovetail groove on the brake wheel 3, and achieving the unlocking purpose.

[0042] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The pull rod type self-unlocking brake insurance system of the pumping unit is characterized by: The safety system comprises a self-unlocking brake safety device (1), a safety control device (2), a brake wheel (3), a reducer (4), a base and a square box (5); The self-unlocking brake safety device (1) is connected to the safety control device (2), the brake wheel (3) is arranged on the reducer (4), the self-unlocking brake safety device (1) is movably connected to the brake wheel (3), and the reducer (4) is connected to the square box (5); The self-unlocking brake safety device (1) is composed of a brake safety hook (6), a brake unlocking handle (7), a reset device (8) and a brake shoe assembly shaft (9); The brake release handle (7) is composed of a handle (10) and a rotating sleeve (11), one end of the handle (10) is connected to the insurance control device (2) via a connecting shaft pin, and the other end of the handle (10) is welded and fixed to the rotating sleeve (11), and the handle (10) drives the rotating sleeve (11) to rotate around the brake shoe assembly axis (9); The brake safety hook (6) has a hook head at one end and an axial hole at the other end; The brake safety hook (6) and the brake release handle (7) are respectively mounted on the brake shoe assembly shaft (9); The end surface of the rotating sleeve (11) is provided with two stepped protrusions adapted to the inner surface of the shaft hole of the brake safety hook (6); The axial hole of the brake safety hook (6) is mounted in cooperation with the brake shoe assembly shaft (9), and the axial hole is a long slot hole with steps and grooves.

2. The pull rod type self-unlocking brake insurance system for oil pumping unit according to claim 1 is characterized in that: The reset device (8) is a reset spring.

3. The pull rod type self-unlocking brake insurance system for oil pumping unit according to claim 1 is characterized in that: The safety control device (2) is a connecting rod mechanism.

4. The pull rod type self-unlocking brake insurance system for oil pumping unit according to claim 1 is characterized in that: The hook head end of the brake safety hook (6) is movably connected to the brake wheel (3).

5. The pull rod type self-unlocking brake insurance system for oil pumping unit according to claim 1 or 4, characterized in that: The brake wheel (3) is provided with a brake groove, and the hook head end of the brake safety hook (6) can be inserted into the brake groove, and the brake groove is a dovetail groove.

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