An anti-tipping structure for a beam pumping unit

Abstract

This application provides an anti-tipping structure for a beam pumping unit. Its irregularly shaped housing is detachably mounted on the top surface of the beam. A first mercury switch and a second mercury switch are respectively mounted on the inner wall of one side plate of the irregularly shaped housing. The angle between the first mercury switch and the first plane is 173°, and the angle between the second mercury switch and the first plane is 7°. The first plane is parallel to the plane containing the top plate of the irregularly shaped housing. One end of a cable is electrically connected to the first mercury switch and the second mercury switch, respectively. The low-voltage power supply at the output of the power converter is electrically connected to the other end of the cable and a relay. The normally open contacts of the relay, specifically the first and second control output terminals, are electrically connected to the control circuit of the pumping unit's motor for controlling the motor's operation. This device is low-cost, highly practical, and can detect whether the horizontal tilt of the pumping unit's beam exceeds the limit.

Description

Technical Field

[0001] This application relates to the field of oil extraction, and more particularly to an anti-tipping structure for a beam pumping unit. Background Technology

[0002] In actual production of beam pumping units, mechanical fatigue caused by long-term alternating loads can lead to failures such as broken connecting rods and crossbeams, or loose or broken crank pins. Without safety protection devices, the motor continues to run, causing the pumping unit to overturn due to single-arm operation, resulting in the scrapping of beams, connecting rods, and supports, as well as damage to production facilities such as the wellhead.

[0003] Because connecting rods, crossbeams, or crank pins often break suddenly, and there are currently no effective means to detect them in advance, they can cause serious accident losses once they occur. Utility Model Content

[0004] One of the purposes of this application is to provide an anti-tipping structure for a walking beam pumping unit, so as to solve the problem that damage to the connecting rod, crossbeam or crank pin of existing pumping units cannot be detected in time.

[0005] The technical solution of this application is:

[0006] An anti-tipping structure for a beam pumping unit includes an inclination sensing structure, a cable, and a control structure. The inclination sensing structure is installed on the top surface of the beam of the pumping unit and is used to monitor the inclination angle of the beam. It includes a shaped housing, a first mercury switch, and a second mercury switch. The shaped housing is detachably installed on the top surface of the beam. The first and second mercury switches are respectively installed on the inner wall of one side plate of the shaped housing. The angle between the first mercury switch and a first plane is 172-174°, and the angle between the second mercury switch and the first plane is... The included angle between the surfaces is 6-8°, and the first plane is parallel to the plane containing the top plate of the irregularly shaped shell; one end of the cable is electrically connected to the first mercury switch and the second mercury switch respectively; the control structure is installed in the control box of the pumping unit and includes a power converter and a relay, the low-voltage power supply of the output end of the power converter is electrically connected to the other end of the cable and the relay respectively, and the first control output end and the second control output end of the normally open contact of the relay are electrically connected to the control circuit of the motor of the pumping unit for controlling the operation of the motor.

[0007] As one technical solution of this application, the irregularly shaped shell includes a bottom plate, a first side plate, a second side plate, a third side plate, and a top plate; the bottom plate is detachably installed on the top surface of the crossbeam; the side walls of the first side plate, the second side plate, and the third side plate are connected in sequence, and their bottoms are all installed on the periphery of the bottom plate; the top plate covers the top of the first side plate, the second side plate, and the third side plate; the first side plate, the second side plate, and the third side plate are all perpendicular to the top plate, and the included angle between the second side plate and the bottom plate is 97.5°.

[0008] As one technical solution of this application, the first mercury switch and the second mercury switch are respectively symmetrically installed on the inner wall of the second side plate, and the angle between the first mercury switch and the first plane is 173°, the angle between the second mercury switch and the first plane is 7°, and the first plane is parallel to the plane where the top plate is located.

[0009] As one technical solution of this application, the first side plate and the third side plate are parallel and both are right trapezoidal in shape.

[0010] As one technical solution of this application, the bottom of the irregular shell is fixedly mounted with a magnet by a plurality of screws, the magnet is attracted to the top surface of the crossbeam, and the crossbeam is made of iron.

[0011] The beneficial effects of this application are:

[0012] The anti-overturning structure for the beam pumping unit disclosed in this application, through the design of an inclination sensing structure, cable, and control structure, can prevent the beam pumping unit from tilting and continuing to operate on a single arm due to failures such as connecting rod or crossbeam breakage, or crank pin detachment or breakage. It can effectively reduce equipment damage and economic losses. Moreover, the device is low in cost, safe, and particularly suitable for the actual conditions of cluster well platforms. It is also highly practical, capable of timely and rapid detection of whether the horizontal inclination of the beam pumping unit exceeds the limit. It can also detect the integrity of the first mercury switch, the second mercury switch, and the cable, thereby preventing failure to operate due to damage to the mercury switch or cable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of an anti-tipping structure for a beam pumping unit provided in an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the electrical principle of the anti-tipping structure for a beam pumping unit provided in an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of an irregularly shaped shell provided in an embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the first angle of the irregularly shaped shell provided in an embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the second angle of the irregularly shaped shell provided in an embodiment of this application.

[0019] Icons: 1-Cable; 2-Irregularly shaped housing; 3-First mercury switch; 4-Second mercury switch; 5-Power converter; 6-Relay; 7-Base plate; 8-First side plate; 9-Second side plate; 10-Third side plate; 11-Top plate; 12-Magnet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this application and to simplify 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. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] Example:

[0027] Please refer to Figure 1 (Refer to) Figures 2 to 5 This application provides an anti-tipping structure for a beam pumping unit, which mainly solves the problem of preventing overturning accidents caused by the beam of the beam pumping unit tilting and continuing to operate on a single arm due to failures such as connecting rod or crossbeam breakage, or crank pin detachment or breakage. It mainly includes a tilt sensing structure, a cable 1, and a control structure. The tilt sensing structure is installed on the top surface of the beam of the pumping unit and is used to monitor the tilt angle of the beam. It mainly includes a shaped housing 2, a first mercury switch 3, and a second mercury switch 4. The shaped housing 2 is detachably installed on the top surface of the beam. The first mercury switch 3 and the second mercury switch 4 are respectively installed on the inner wall of one side plate of the shaped housing 2, and the included angle between the first mercury switch 3 and the first plane is 172-174°. The angle between the second mercury switch 4 and the first plane is 6-8°, and the first plane is parallel to the plane where the top plate 11 of the irregular shell 2 is located. The first mercury switch 3 and the second mercury switch 4 are connected in series by cable 1 to provide tilt control signals to the control structure. At the same time, one end of cable 1 is electrically connected to the first mercury switch 3 and the second mercury switch 4 respectively. In addition, the control structure is installed in the control box of the pumping unit to control the operation of the motor. It includes a power converter 5 and a relay 6. The low voltage power supply of the output terminal of the power converter 5 is electrically connected to the other end of cable 1 and relay 6 respectively. The first control output terminal and the second control output terminal of the normally open contact of relay 6 are electrically connected to the control circuit of the motor of the pumping unit to control the operation of the motor.

[0028] The signals from the first mercury switch 3 and the second mercury switch 4 are transmitted to the relay 6 via cable 1. The relay 6 then controls the operation of the original beam pumping unit motor. This design is reasonable, low-cost, and highly practical. It can detect whether the horizontal inclination of the beam of the beam pumping unit exceeds the limit, and it can also detect the integrity of the first mercury switch 3, the second mercury switch 4, and cable 1, thereby preventing failure to operate due to damage to the first mercury switch 3, the second mercury switch 4, or cable 1.

[0029] Furthermore, its irregularly shaped housing 2 includes a base plate 7, a first side plate 8, a second side plate 9, a third side plate 10, and a top plate 11; wherein the side walls of the first side plate 8, the second side plate 9, and the third side plate 10 are connected in sequence, and their bottoms are all installed on the periphery of the base plate 7; and the top plate 11 covers the top of the first side plate 8, the second side plate 9, and the third side plate 10; the first side plate 8, the second side plate 9, and the third side plate 10 are all perpendicular to the top plate 11, and the first side plate 8 and the third side plate 10 are both right-angled trapezoids, and the included angle between the second side plate 9 and the base plate 7 is 97.5°. In addition, the first mercury switch 3 and the second mercury switch 4 are symmetrically installed on the inner wall of the second side plate 9. Specifically, in this embodiment, the included angle between the first mercury switch 3 and the first plane can be 173°, and the included angle between the second mercury switch 4 and the first plane can be 7°, and the first plane is parallel to the plane where the top plate 11 is located. Meanwhile, the bottom of the base plate 7 is fixedly installed with magnets 12 by multiple screws. The magnets 12 are attracted to the top surface of the iron beam, so that the irregular shell 2 can be detachably installed on the metal beam. Therefore, the bottom of the irregular shell 2 is fixed with magnets 12 by screws, and during installation, it is directly attracted to the iron beam of the walking beam pumping unit by magnets 12.

[0030] It should be noted that in this embodiment, the cable 1, the first mercury switch 3, the second mercury switch 4, the power converter 5, and the relay 6 all adopt the structure of the prior art, and their specific working principles will not be described in detail here.

[0031] An external power supply is connected to the input terminal of the power converter 5 through the live wire and neutral wire terminals on the power converter 5. The low-voltage power supply at the output terminal of the power converter 5 is connected to form a circuit through cable 1, the coil of relay 6, the first mercury switch 3, and the second mercury switch 4. The normally open contacts of relay 6 are electrically connected to the control circuit of the pumping unit motor, respectively, to provide a shutdown control signal to the external pumping unit motor.

[0032] In addition, it should be noted that the inner cavity of the irregularly shaped shell 2 is filled with epoxy resin to protect and seal its internal components.

[0033] The working principle of this device is:

[0034] An external power supply is connected to the input terminal of the power converter 5 through the live wire and neutral wire terminals on the power converter 5. The low-voltage power supply at the output terminal of the power converter 5 is connected through cable 1, relay 6 coil, first mercury switch 3, and second mercury switch 4 to form a tilt signal circuit. Since the angle between the first mercury switch 3 and the first plane is 173° and the angle between the second mercury switch 4 and the first plane is 7°, the tilt signal circuit is conductive during normal operation, causing the normally open contact of relay 6 to close, providing an operating circuit to the motor of the beam pumping unit through the first control output terminal, the second control output terminal, and the cable.

[0035] If a beam pumping unit experiences a connecting rod or crossbeam breakage, or a crank pin detachment or breakage during production, causing the crossbeam tilt angle to exceed ±7° of the direction under normal operating conditions, the first mercury switch 3 or the second mercury switch 4 will disconnect the signal circuit, causing the normally open contact of the relay 6 to return to the open state. This disconnects the motor operating circuit of the beam pumping unit, causing the motor to stop running, thus stopping the beam pumping unit to avoid a rollover accident caused by single-arm operation.

[0036] In addition, since the beam pumping unit will have a certain tilt angle during normal operation, a 97.5° included angle is designed at the bottom of the irregular shell, that is, the included angle between the second side plate 9 and the bottom plate 7 is designed to be 97.5°, so as to avoid the malfunction of the first mercury switch 3 and the second mercury switch 4 caused by this.

[0037] In summary, the anti-overturning structure for the beam pumping unit of this application, through the design of the tilt sensing structure, cable 1, and control structure, can prevent the beam pumping unit from tilting and continuing to operate on a single arm due to failures such as connecting rod or crossbeam breakage, or crank pin detachment or breakage. It can effectively reduce equipment damage and economic losses. Moreover, the device is low in cost, safe, and particularly suitable for the actual conditions of cluster well platforms. It is also highly practical, capable of timely and quickly detecting whether the horizontal tilt of the beam pumping unit exceeds the limit, and can also detect the integrity of the first mercury switch 3, the second mercury switch 4, and cable 1, thereby preventing the failure to operate due to damage to the mercury switch or cable 1.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An anti-tipping structure for a beam pumping unit, characterized in that, The system includes a tilt sensing structure, a cable, and a control structure. The tilt sensing structure is installed on the top surface of the crossbeam of the pumping unit and is used to monitor the tilt angle of the crossbeam. It includes a shaped housing, a first mercury switch, and a second mercury switch. The shaped housing is detachably installed on the top surface of the crossbeam. The first mercury switch and the second mercury switch are respectively installed on the inner wall of one side plate of the shaped housing. The angle between the first mercury switch and a first plane is 172-174°, and the angle between the second mercury switch and the first plane is 6-8°. The first plane is parallel to the plane containing the top plate of the shaped housing. One end of the cable is electrically connected to the first mercury switch and the second mercury switch, respectively. The control structure is installed in the control box of the pumping unit and includes a power converter and a relay. The low-voltage power supply at the output end of the power converter is electrically connected to the other end of the cable and the relay, respectively. The normally open contacts of the relay, the first control output terminal and the second control output terminal, are electrically connected to the control circuit of the pumping unit's motor to control the operation of the motor.

2. The anti-tipping structure for a beam pumping unit according to claim 1, characterized in that, The irregularly shaped shell includes a bottom plate, a first side plate, a second side plate, a third side plate, and a top plate; the bottom plate is detachably mounted on the top surface of the crossbeam; the side walls of the first side plate, the second side plate, and the third side plate are connected in sequence, and their bottoms are all mounted on the periphery of the bottom plate; the top plate covers the top of the first side plate, the second side plate, and the third side plate; the first side plate, the second side plate, and the third side plate are all perpendicular to the top plate, and the included angle between the second side plate and the bottom plate is 97.5°.

3. The anti-tipping structure for a beam pumping unit according to claim 2, characterized in that, The first mercury switch and the second mercury switch are respectively symmetrically installed on the inner wall of the second side plate, and the angle between the first mercury switch and the first plane is 173°, the angle between the second mercury switch and the first plane is 7°, and the first plane is parallel to the plane where the top plate is located.

4. The anti-tipping structure for a beam pumping unit according to claim 2, characterized in that, The first side plate and the third side plate are parallel and both are right-angled trapezoidal shapes.

5. The anti-tipping structure for a beam pumping unit according to claim 1, characterized in that, The bottom of the irregularly shaped shell is fixedly fitted with a magnet by multiple screws. The magnet is attracted to the top surface of the crossbeam, and the crossbeam is made of iron.

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