WO2024131941A1

WO2024131941A1 - Oil pumping unit safety apparatus and oil pumping unit

Info

Publication number: WO2024131941A1
Application number: PCT/CN2023/141020
Authority: WO
Inventors: 张聪
Original assignee: 德瑞石油装备（青岛）有限公司
Priority date: 2022-12-23
Filing date: 2023-12-22
Publication date: 2024-06-27
Also published as: CN115727082A

Abstract

An oil pumping unit safety apparatus (5) and an oil pumping unit. The oil pumping unit safety apparatus (5) comprises: a locking part (51), the locking part (51) being arranged opposite to a brake wheel (411) of an oil pumping unit; the locking part (51) is operable to move between a first position and a second position, and when the locking part (51) is located at the first position, the locking part (51) meshes with the brake wheel (411) to block rotation of the brake wheel (411); and when the locking part (51) is located at the second position, the locking part (51) is disengaged from the brake wheel (411), allowing the brake wheel (411) to rotate; an operation part (53), which is connected to the locking part (51) so as to receive an operation in order to drive the locking part (51) to move between the first position and the second position; and a connecting part (52), which is disposed between the locking part (51) and the operation part (53) so as to allow the operation part (53) and the locking part (51) to be spaced apart from one another by a predetermined distance.

Description

Oil pumping unit safety device and oil pumping unit

Technical Field

The present invention belongs to the technical field of oil pumping unit machinery, and in particular relates to a safety device of an oil pumping unit and an oil pumping unit.

Background technique

In the process of oil extraction, the oil pump is a very important extraction equipment. The oil pump is usually driven by a power source through a reducer to move the oil pumping device to perform oil extraction operations. Since oil extraction is generally carried out in the field and faces various complex actual operating conditions, ensuring the safety of personnel and equipment during the operation of the oil pump is the primary task of oil extraction.

In the prior art, the brake mechanism of the oil pump mostly relies on the brake pads to embrace and lock the brake wheel for braking. According to work needs, the oil pump equipment is stopped at a certain position through such a brake mechanism. For this reason, the brake mechanism of the oil pump must be reliable and safe. Especially when the oil pump is overhauled, the pump rod is loosened without removing the counterweight, and the brake is only braked by the brake pads embracing and locking the brake wheel. The brake pads will bear a lot of force. If the brake mechanism is not reliable enough, or even fails, the sudden rotation of the oil pump is likely to cause casualties to the operator, posing a great safety hazard.

In the prior art, in order to prevent brake failure, one implementation method is to set a locking safety device on the brake wheel, which can lock the brake wheel by locking, so as to prevent the brake wheel from rotating in an uncontrolled state when the brake fails, causing safety accidents. This braking method needs to be operated on the brake wheel, and the brake wheel is often located at a high position, which brings inconvenience to the operation. In addition, since the brake wheel is connected to the reducer, and the reducer is connected to the actuator of the pumping unit, this operation often requires a lot of force to complete. In some cases, such as deformation or improper position, it exceeds the physical strength of ordinary people and becomes more difficult to operate. As a result, the operator will be reluctant to operate the safety device because the brake will not fail in most cases, but it also leads to major accidents.

The prior art discloses a pumping unit safety device. After the brake mechanism stops the pumping unit at a certain position, the hydraulic system moves axially to insert the stopper into the pulley web cavity. The pulley is jammed to achieve the purpose, but this device uses a hydraulic system, which has the disadvantages of high manufacturing and maintenance costs, large overall device structure, small application range, long travel, unstable braking, difficult installation, and easy damage to the pulley. The existing technology is limited by the operating space of the brake wheel and the need for a large locking force, and has always lacked an effective, convenient and easy-to-use backup brake failure safety device.

Summary of the invention

The present disclosure is proposed just under the above-mentioned circumstances of the prior art, and the technical problem to be solved in the present disclosure is to provide a safety device for an oil pump to improve the convenience and reliability of the operation of the safety device.

In order to solve the above technical problems, the technical solutions adopted by the present disclosure include:

A pumping unit safety device, characterized in that it comprises: a locking part, which is arranged opposite to the brake wheel of the pumping unit; the locking part is operable to move between a first position and a second position, and when the locking part is located at the first position, the locking part is engaged with the brake wheel to block the rotation of the brake wheel; when the locking part is located at the second position, the locking part is disengaged from the brake wheel to allow the rotation of the brake wheel; an operating part, connected to the locking part to accept operation so as to drive the locking part to move between the first position and the second position; a connecting part, arranged between the locking part and the operating part, to allow the operating part and the locking part to be spaced apart from each other by a predetermined distance.

Preferably, the locking portion includes a locking pin; the brake wheel includes at least one accommodating portion arranged along the periphery of the brake wheel; when the locking pin is in the first position, it extends into at least one of the accommodating portions to form engagement; when the locking pin is in the second position, the locking pin moves out of the accommodating portion to form the disengagement.

Preferably, the locking portion further comprises a guide member slidably connected to the locking pin to guide a movement trajectory of the locking pin between the first position and the second position.

Preferably, the guide member includes a through hole extending in the front-to-rear direction, the locking pin is arranged through the through hole, and the movement of the locking pin is guided by the through hole.

Preferably, the operating part comprises: a rotating member, the rotating member is rotatably arranged at a predetermined On the pivot, the rotating member is operated to rotate and drive the pivot to rotate; the conversion member connects the pivot with the connecting part, converts the rotation of the pivot into linear motion and outputs it to the connecting part.

Preferably, the rotating member includes an operating wheel, which rotates around a pivot to accept a rotation operation; the conversion member includes a lead screw, which is connected to the operating wheel, and the lead screw rotates when the operating wheel rotates; and a nut, which is fixed to the housing of the operating part and cooperates with the lead screw thread. When the lead screw rotates in the nut, the rotation of the lead screw is guided to move forward and backward through the thread; the operating part also includes a connecting member, which is connected to the lead screw so as to be relatively rotatable.

Preferably, the operating part further includes a connecting rod fixedly connected to the connecting piece; and a guide hole slidingly matched with the connecting rod to guide the connecting rod to move forward and backward driven by the connecting piece.

Preferably, the oil pumping unit safety device further comprises a bias spring, wherein the bias spring is in a biased state to apply a biasing force to the lock pin to extend toward the brake wheel.

Preferably, the connecting portion comprises a steel wire rope, and when the steel wire rope is tightened backward, a backward unlocking force is applied to the locking pin to drive the locking pin to move backward to disengage.

Preferably, the locking portion includes a front positioning block and a rear positioning block which are linked to the locking pin; when the locking pin is extended forward to the extreme position, the front positioning block abuts against the front baffle, limiting the forward movement of the locking pin; when the locking pin is retracted backward to the extreme position, the rear positioning block abuts against the rear baffle, limiting the backward movement of the locking pin.

Preferably, the locking part also includes a sliding rod, which is fixedly arranged with the mounting plate of the locking part and is connected with the locking pin in a relatively slidable manner; the spring includes a solenoid spring sleeved on the sliding rod, one end of the solenoid spring is relatively fixedly arranged with the mounting plate of the locking part, and the other end is connected with the locking pin.

Preferably, the sliding rod comprises two guide rods arranged at the upper and lower parts, and the two solenoid springs are respectively sleeved on the upper and lower sliding rods.

Preferably, a safety lever is operably disposed through the pivot to receive the The driving force of the pivot when it rotates; a limiting member connected to the safety rod, limiting the rotation of the safety rod under the driving force to limit the rotation of the operating part.

Preferably, the locking portion is arranged on the reducer housing of the oil pump, opposite to the brake wheel; and the operating portion is arranged on the power source base of the oil pump.

Preferably, the connecting portion is detachably connected to the operating portion and the locking portion.

The above-mentioned technical solution of the present invention adopts an oil pump safety device, which locks the brake wheel by meshing the locking part with the brake wheel, thereby improving the reliability in the brake failure state. In addition, the operating part and the locking part of the safety device are arranged separately, which is convenient for operation and can achieve stable locking.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of this specification 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 recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

FIG1 is a structural diagram of an oil pumping unit according to an embodiment of the present disclosure;

FIG2 is a schematic diagram of a partial structure of an oil pumping unit in a specific embodiment of the present disclosure;

FIG3 is a schematic structural diagram of a safety device for an oil pumping unit in a specific embodiment of the present disclosure;

FIG4 is a schematic diagram of a partial structure of a safety device for an oil pumping unit in a specific embodiment of the present disclosure;

FIG5 is a schematic diagram of a locking state structure of a safety device of an oil pumping unit in a specific embodiment of the present disclosure;

FIG6 is a schematic diagram of a partial structure of a safety device for an oil pumping unit in a specific embodiment of the present disclosure;

FIG7 is a schematic diagram of a locking state structure of a safety device of an oil pumping unit in a specific embodiment of the present disclosure;

FIG8 is a schematic diagram of the structure of an operating part of a safety device for an oil pumping unit in a specific embodiment of the present disclosure;

FIG9 is a schematic cross-sectional structure diagram of an operating portion of a safety device for an oil pump in a specific embodiment of the present disclosure.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection, which can be a mechanical connection, or an electrical connection, which can be a direct connection, or can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

To facilitate understanding of the embodiments of the present disclosure, further explanation will be given below with reference to specific embodiments in conjunction with the accompanying drawings, and the embodiments do not constitute a limitation on the embodiments of the present disclosure.

As shown in Fig. 1-9, in this specific embodiment, a pumping unit is provided, which generally includes a power source 1, a speed reducer 2, and an actuator 3. The power source 1 provides power for the pumping unit, and generally includes an electric motor, etc. The actuator 3 includes a sucker rod or a similar pumping mechanism, which is connected to the power unit through a speed reducer, receives power from the power unit, and thus realizes the pumping action.

The reduction gear generally includes a reducer formed by the cooperation of various gears. Such a reducer is generally placed on a base.

In order to operate the oil pump to stop at a predetermined position under different working conditions, the oil pump usually also includes a brake device 4, which includes a brake part 41 arranged on the reducer, and a brake operating part 43 connected to the brake part through a brake connecting part 42. The brake part is arranged on the reducer, and the brake operating part can be arranged on the motor base, as shown in Figure 2, so that personnel can operate the brake on the ground or at a lower height, thereby improving the convenience of brake operation.

The brake part 41 includes a brake wheel 411 and a brake pad 412. The brake wheel is connected to the reducer, and preferably is connected to the input shaft of the reducer. The brake pad is arranged around the brake wheel.

Preferably, the number of the brake pads 412 is multiple, and the multiple brake pads are arranged around the outer circumference of the brake wheel 411 to provide a stable braking force. The brake pads brake the brake wheel through friction, and by braking the brake wheel, the rotation of the reducer is braked, thereby preventing the action of the pumping unit actuator.

The brake operating part 43 and the brake part 41 are connected via a brake connecting part 42, and the brake connecting part preferably adopts a mechanical power connection, for example, a connecting mechanism such as a wire rope, a connecting rod, etc. This connecting mechanism has the characteristics of fast response speed and reliable operation.

Through the structure of the brake operating part, the brake part and the brake connecting part, the brake operating part 43 can be arranged on the motor base 11, which is convenient for personnel to operate. The brake part is arranged on the reducer, and can quickly brake the movement of the reducer. The brake connecting part 42 is a mechanical connection, which has the characteristics of fast response speed and reliable connection, thereby providing a brake operating device that is easy to operate and relatively reliable.

Although this type of brake device is relatively reliable, its braking is based on the friction between the brake pad and the brake wheel. The braking force may decrease or disappear easily due to changes in friction conditions such as wear, so there is still a certain risk of brake failure.

When the brake fails, the pumping unit loses the braking force and is prone to move in an uncontrolled state, thus causing a safety accident. Therefore, a safety device independent of the brake device is required to provide a safety backup in the case of brake failure.

An ideal safety device should be easy to operate and highly reliable. The selected device also needs to have a relatively simple structure and be easy to install. Although some existing safety devices can provide certain safety guarantees, the safety devices operated on the brake wheel are often difficult to operate due to their high position, and because they bear the load of the pumping unit, they often require a lot of force to operate; and the device that uses an additional hydraulic system to block the pulley has a complex structure and is difficult to install, which is not conducive to promotion.

To meet one or more of these requirements, the structure of the safety device 5 provided in this specific embodiment is shown in FIG3 .

The safety device 5 in this specific embodiment includes a locking portion 51, and the locking portion 51 includes a locking pin 512, and the locking pin 512 is slidably engaged with the groove 4110 on the brake wheel 411. The engagement means that the rotation of the brake wheel is blocked by the locking pin 512, thereby preventing the rotation of the brake wheel, thereby achieving the safe locking of the rotating wheel by the locking pin.

In this specific embodiment, the groove can adopt the structure shown in Figure 4, which is set at the edge of the brake wheel, and the groove has a front side wall and a rear side wall along the front and rear directions of the rotation direction of the brake wheel. The locking pin can be set between the front side wall and the rear side wall, and the locking pin cooperates with the front side wall and the rear side wall to be blocked by the two, thereby limiting the rotation of the brake wheel, thereby locking the rotation of the brake wheel. Although the figure shows one of the structures of the grooves, the groove structure in this specific embodiment is not limited to this, and the structure of the groove does not have the form of a groove in the general sense. Various structures with front and rear blocking walls, such as protrusions or holes, are within the scope of the groove defined in this specific embodiment.

In this specific embodiment, preferably, the locking portion 51 can be only one locking pin, or multiple locking pins can be provided for safety considerations, and the multiple locking pins can be linked or not. The grooves or through holes can be provided in multiple numbers, distributed in the middle of the brake wheel, and when the locking portion 51 is engaged with any one of the grooves or through holes, the rotation of the brake wheel can be prevented, thereby locking the related movements of the various components of the oil pumping unit.

The locking pin is slidably arranged on a slide seat, and the slide seat includes a mounting plate 511, and the mounting plate is fixedly arranged relative to the reducer. Preferably, the mounting plate can be arranged on the housing of the reducer. A slide rail is arranged on the slide seat, and the slide rail cooperates with the lock pin to guide the sliding of the lock pin, thereby keeping the lock pin stably moving between the braking position for locking the brake wheel and the unlocking position for unlocking the lock, thereby improving the safety and stability of the locking operation.

Furthermore, the slide rail may include a through hole 513, through which the locking pin passes, and through which the movement of the locking pin is guided. The design of the through hole can keep the locking pin in a predetermined position and prevent it from being dislocated.

In cooperation with the through hole, a stopper 514 is provided at the rear end of the locking pin, and the width of the stopper is greater than the width of the through hole. In this way, the stopper is used to limit the extreme position of the locking pin extending forward to prevent the locking pin from losing its position.

In one embodiment, the rear end of the locking pin is connected to a driving rod 519. In one embodiment, as shown in Figures 2-5, the driving rod 519 is directly connected to the locking pin. In another embodiment, as shown in Figures 6-7, the locking pin can be indirectly connected to the driving rod through a cam mechanism.

A rear baffle plate 515 may also be provided behind the driving rod, and a through hole or a through groove is provided on the rear baffle plate 515. A limit block 516 is provided on the driving rod to cooperate with the through hole or the through groove on the rear baffle plate. The limit block 516 and the rear baffle plate 515 cooperate to limit the extreme position of the backward movement of the locking pin to prevent the locking pin from falling out of the slide rail.

In the embodiment as shown in Figures 6-7, the locking pin can be indirectly connected to the driving rod through a cam mechanism. The driving rod 519 is connected to the cam rod 520, and the cam rod can make a circular motion with its positioning axis as the center under the drive of the driving rod 519. The cam rod is provided with a protrusion 521, and the protrusion and the driving rod are located on both sides of the positioning axis, and the protrusion is engaged with the recessed portion of the cam block 522 provided on the locking pin 512. When the driving rod reciprocates under power drive, the locking pin 512 is driven to move forward and backward by the cam mechanism. This cam mechanism has more obvious convenience in modifying the existing oil pump reducer, and the safety device of this specific embodiment can be more conveniently placed on the brake wheel of the oil pump reducer. Correspondingly, in the embodiment of Figures 6-7, the mounting plate 511 is set at a predetermined angle with the locking pin, so that The locking pin and the mounting plate are fixed to appropriate positions respectively.

Further preferably, the lock pin is connected to a spring 517, and the spring applies a force to the lock pin to extend forward. Preferably, in the embodiments shown in Figures 2-5, the lock pin can be connected to a guide rod 518 in a relatively sliding manner, and the guide rod is preferably provided on the upper and lower sides of the driving member, respectively, and two return springs are respectively sleeved on the guide rods to apply a biasing force to the lock pin to extend forward.

In the embodiment shown in FIGS. 6-7 , a return spring is provided between the cam block 520 at the rear side of the locking pin 512 and the mounting seat 511 .

The forward elastic force exerted by the return spring can keep the lock pin in the locked position, which is beneficial to safety. In addition, when the lock pin is not aligned with the locking groove around the brake wheel and cannot be inserted, the spring presses the lock pin against the side of the brake wheel. When the lock pin is opposite to the locking groove of the brake wheel, the lock pin is automatically ejected into the locking hole under the drive of the spring elastic force, which is beneficial to quickly and automatically achieve locking and improve safety. The risk of spring loss and deformation is reduced by setting the upper and lower springs; the force balance of the lock pin is improved by setting the upper and lower springs.

The above locking part can be arranged on the reducer to facilitate the execution of the locking action. The locking pin cooperates with the locking groove on the periphery of the brake wheel without taking up extra space, and the locking is reliable through the biasing force of the spring.

However, the reducer is usually set at a higher position, which makes it inconvenient to directly operate the locking part to lock and unlock. Therefore, in this specific embodiment, a connecting part 52 is provided, which has a predetermined length, one end of which is connected to the locking pin, and the other end is connected to the operating part 53, so that the operating action provided by the operating part is transmitted to the locking part, thereby realizing the operation at a position far away from the reducer, and improving the convenience of operation.

The driving rod of the locking pin is connected to the connecting part 52, and the connecting part can provide the driving force for the locking pin to move forward or backward. In this specific embodiment, the connecting member is preferably a steel wire rope or a similar relatively flexible material, which can provide a pulling force, that is, to pull the locking pin backward. The spring provides the driving force for the locking pin to extend forward. The flexible wire rope can reduce the influence of the deformation of the connecting device on the system.

In this specific embodiment, the connecting portion 52 and the locking portion and the operating portion may be connected in a detachable manner, which is convenient for maintenance and replacement.

The structure of the operating part 53 is shown in the figure. It includes an operating wheel 531. In this specific embodiment, the operating wheel is an integral disc shape, but those skilled in the art can know that other structures that can guide circular motion can also be included in this specific embodiment, such as a semi-circular disc, or even a rod, etc., which can be provided with a pivot at one position to operate other positions to achieve circular rotation. The operating wheel can rotate around a pivot 532. When the operating disk rotates, the pivot is driven to rotate. The pivot is provided with a thread, which cooperates with the nut 533 on the fixing member to form the principle of a screw rod. When the operating disk rotates left and right, based on the guiding effect between the screw and the nut, the pivot moves forward or backward to drive the connecting part to move, completing the locking and unlocking action. The operation of the screw can provide a large operating force. Pulling the wire rope based on the rotation of the operating wheel can easily pull the lock pin. Even under the condition of large and complex conditions imposed on the lock pin, the unlocking operation can also be easily achieved.

Further preferably, the rear end of the pivot can be connected to a connecting member 534, the rear end of the pivot is arranged in the connecting member, the pivot and the connecting member are rotatably connected, and the rear end of the connecting member is connected to the connecting part, so that when the pivot rotates, the connecting part only receives the front and rear driving force and does not rotate with the pivot.

In addition, further, a guide rod 535 may be provided at the rear end of the connection part, and the guide rod cooperates with the slide slot, and the slide slot guides the forward and backward movement to make the forward and backward movement more stable, and the steel wire rope of the connection part is connected through the guide rod. In this way, the guidance can be more stable.

When the pumping unit is in operation, the spring is always in a compressed state, and the lock pin is away from the brake wheel groove. When the well repair operation needs to be stopped, the brake operating part 43 is first used to control the brake part 41 to stop the pumping unit at a certain position, and then the hand wheel/handle is rotated to convert the rotary motion into linear motion, and the linear motion of one end of the operating part 53 is transmitted to the other end through the connecting part 52. The locking pin of the locking part 51 is extended under the action of the spring force and inserted into the notch of the brake wheel. Once the brake mechanism fails, the locking pin will jam the brake wheel to prevent the pumping unit from rotating, thereby ensuring safety. When the well repair operation is completed, the hand wheel/handle is rotated in the opposite direction to pull the locking pin away from the notch of the brake wheel and limit it by the limit block. At this time, the spring remains in a compressed state, and then the brake operating part is used to control the brake part to restore the pumping unit equipment to the initial working state.

Further preferably, the operating part includes a safety rod 536, which is operably arranged to pass through the pivot to receive the driving force of the pivot when it rotates; a limiting member connected to the safety rod to limit the rotation of the safety rod under the drive of the driving force, thereby limiting the rotation of the operating part.

The safety device 5 in this specific embodiment mainly includes three main components: a locking part, a connecting part and an operating part. The structure is ingenious and simple, with high safety performance, low cost and easy operation. In addition, the working part of the safety device is still the brake wheel, which will not affect other structures. In addition, the rotary motion is converted into linear motion through the operating part, and the motion is smooth. The linear motion of one end is transmitted to the other end through the connecting part, and the locking part is controlled to be extended and retracted, which has a wide range of applications. The oil pump is locked by the locking part to prevent the oil pump from accidentally rotating, which is safe and reliable.

The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present disclosure in detail. It should be understood that the above description is only the specific implementation methods of the present disclosure and is not intended to limit the protection scope of the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

A pumping unit safety device, characterized by comprising:

A locking portion, the locking portion is arranged opposite to the brake wheel of the oil pump; the locking portion is operable to move between a first position and a second position, when the locking portion is located at the first position, the locking portion is engaged with the brake wheel to block the rotation of the brake wheel; when the locking portion is located at the second position, the locking portion is disengaged from the brake wheel to allow the rotation of the brake wheel;

an operating portion connected to the locking portion to receive an operation so as to drive the locking portion to move between the first position and the second position;

A connecting portion is provided between the locking portion and the operating portion to allow the operating portion and the locking portion to be spaced apart from each other by a predetermined distance.
The oil pumping unit safety device according to claim 1 is characterized in that:

The locking portion includes a locking pin;

The brake wheel comprises at least one receiving portion arranged along the periphery of the brake wheel;

When the locking pin is in the first position, it extends into at least one of the receiving portions to form an engagement;

When the locking pin is in the second position, the locking pin moves out of the receiving portion to form the disengagement.
The oil pumping unit safety device according to claim 2 is characterized in that:

The locking portion further includes a guide member slidably connected to the locking pin to guide a movement trajectory of the locking pin between the first position and the second position.
According to the oil pump safety device of claim 3, it is characterized in that the guide member includes a through hole extending in the front-to-back direction, the locking pin is arranged through the through hole, and the movement of the locking pin is guided by the through hole.
The oil pumping unit safety device according to claim 1 is characterized in that the operating part comprises:

A rotating member, the rotating member is rotatably disposed on a predetermined pivot shaft, the rotating member is operated to rotate and drives the pivot shaft to rotate;

A conversion member connects the pivot and the connecting portion, converts the rotation of the pivot into linear motion and outputs it to the connecting portion.
The oil pumping unit safety device according to claim 5 is characterized in that:

The rotating member includes an operating wheel, which rotates around a pivot axis to receive a rotating operation;

The conversion member includes a lead screw connected to the operating wheel, and the lead screw rotates when the operating wheel rotates; and a nut fixed to the housing of the operating part, and matched with the lead screw thread, when the lead screw rotates in the nut, the rotation of the lead screw is guided to move forward and backward through the thread;

The operating unit further includes:

A connecting piece is connected to the lead screw so as to be relatively rotatable.
The oil pumping unit safety device according to claim 6 is characterized in that the operating part further comprises:

A connecting rod, fixedly connected to the connecting piece;

The guide hole is slidably matched with the connecting rod to guide the connecting rod to move forward and backward under the drive of the connecting piece.
The oil pumping unit safety device according to claim 2 is characterized in that:

The oil pumping unit safety device further comprises a bias spring, wherein the bias spring is in a biased state to apply a biasing force to the lock pin to extend toward the brake wheel.
The oil pumping unit safety device according to claim 2 is characterized in that the connecting portion includes a steel wire rope, and when the steel wire rope is tightened backward, a backward unlocking force is applied to the locking pin to drive the locking pin to move backward to disengage.
The oil pumping unit safety device according to claim 2, characterized in that the locking portion comprises a front positioning block and a rear positioning block linked to the locking pin;

When the locking pin is extended forward to the extreme position, the front positioning block abuts against the front baffle, limiting the forward movement of the locking pin; when the locking pin is retracted backward to the extreme position, the rear positioning block abuts against the rear baffle, limiting the backward movement of the locking pin.
The oil pumping unit safety device according to claim 8 is characterized in that the locking portion further comprises a sliding rod, the sliding rod is fixedly arranged with the mounting plate of the locking portion and is connected with the locking pin so as to be relatively slidable;

The spring comprises a solenoid spring sleeved on the sliding rod, one end of the solenoid spring is fixedly arranged relative to the mounting plate of the locking part, and the other end is connected to the locking pin.
According to the oil pump safety device of claim 11, the characteristic is that the sliding rod comprises two guide rods arranged at the upper and lower parts, and the two solenoid springs are respectively sleeved on the upper and lower sliding rods.
The oil pumping unit safety device according to claim 5 is characterized in that the operating part comprises:

A safety rod, the safety rod is operably disposed through the pivot shaft to receive a driving force when the pivot shaft rotates;

The limiting member is connected to the safety rod and limits the safety rod from rotating under the driving force, thereby limiting the rotation of the operating part.
The oil pumping unit safety device according to claim 1 is characterized in that the locking portion is arranged on the reducer housing of the oil pumping unit and is arranged opposite to the brake wheel;

The operating part is arranged on the oil pumping unit power source base.
The oil pump safety device according to claim 1 is characterized in that the connecting portion is detachably connected to the operating portion and the locking portion.
The oil pumping unit safety device according to claim 1 is characterized in that:

The locking portion is connected to the connecting portion and the locking portion via a cam mechanism, and the cam mechanism includes a cam rod pivotally disposed on the positioning shaft; the cam rod is located on one side of the positioning shaft and connected to the connecting portion, and the cam rod is located on the other side of the positioning shaft and engages with the locking portion, and the locking portion is driven to move between the first position and the second position by the reciprocating motion of the cam.
The oil pumping unit safety device according to claim 2 or 16 is characterized in that The locking portion comprises a locking pin, and the locking pin is slidably arranged on a sliding seat. The sliding seat comprises a mounting plate, and the mounting plate is fixedly arranged relative to the reducer.
The oil pumping unit safety device according to claim 17 is characterized in that

A return spring is arranged between the locking pin and the mounting seat to keep the locking pin at the second position without being subjected to other external forces.
A pumping unit, characterized in that it comprises

A brake device, the brake device comprising a brake part arranged on the reducer, and a brake operating part connected to the brake part through a brake connecting part;

as well as

A safety device as claimed in any one of claims 1 to 18.