Load counterweight adjusting device and method of tower type pumping unit

Abstract

The invention relates to the technical field of oil production engineering, in particular to a load balance weight adjusting device and method of a tower type pumping unit. The device is characterized in that the top of a solid counterweight adjusting mechanism is connected with one end of a load belt on a pumping unit tower; the liquid counterweight adjusting mechanism comprises a liquid storage bag and an automatic regulation and control mechanism; the liquid storage bag is connected with the automatic regulation and control mechanism, and the automatic regulation and control mechanism is used for controlling the counterweight liquid to be injected into the liquid storage bag or controlling the counterweight liquid in the liquid storage bag to be discharged, so that the weight of the counterweight liquid in the liquid storage bag is regulated, and the total weight of the solid counterweight regulation mechanism and the liquid storage bag meets the counterweight requirement of the oil pumping unit. The problems that in the prior art, when the balance weight of the oil pumping unit is adjusted, the oil pumping unit needs to be stopped, a balance weight needs to be put down to the bottom of a tower, the weight of the balance weight needs to be increased or decreased manually, frequent manual adjustment operation is needed, the labor intensity is high, safety risks exist due to frequent starting and stopping, and the equipment operation time efficiency is reduced are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil production engineering, and in particular to a load counterweight adjusting device and method of a tower type pumping unit. BACKGROUND

[0002] The tower type pumping unit with long stroke and low stroke frequency has been widely applied in the industry. The motor of the tower type pumping unit drives the reduction gearbox and the drum to transmit energy to the steel wire belt set through forward and reverse rotation control, and drives the pumping rod to move up and down linearly. The tower type pumping unit has the problems of load loading and unloading in the field application. The load of the tower type pumping unit and the counterweight load in the body are balanced through the suspension of the belt. Under the dragging of the small power motor, the running state of one end up and one end down is always maintained. In actual production, due to various reasons, the downhole load will change, so that the mass of the tower machine counterweight and the load mass are not matched, which causes a large change in the working current of the motor, wastes electric energy, makes the frame and the transmission part unstable, and even causes mechanical accidents.

[0003] In view of the problem, the countermeasures adopted in the industry are to set a box on the counterweight, place a plurality of small fixed counterweights in the box, and form a combination with the main counterweight. The counterweight scheme is calculated and modified by continuously monitoring the current parameters. When the weight of the counterweight needs to be changed, the counterweight is lowered to the bottom of the tower, the box is manually opened, the number of small counterweights is increased or decreased, and the box is closed again to start the machine. The operation has the problems of frequent manual adjustment, high labor intensity, safety risk and production influence. SUMMARY

[0004] The present application provides a load counterweight adjusting device and method of a tower type pumping unit. The pumping unit needs to be stopped, the counterweight is lowered to the bottom of the tower, and the weight of the counterweight is increased or decreased manually. This method needs frequent manual adjustment, has high labor intensity, and has safety risk and low equipment running efficiency.

[0005] According to one aspect of the present application, a load counterweight adjusting device of a tower type pumping unit is provided, which comprises a solid counterweight adjusting mechanism and a liquid counterweight adjusting mechanism. The top of the solid counterweight adjusting mechanism is connected with one end of the load belt on the tower of the pumping unit. The liquid counterweight adjusting mechanism comprises a liquid storage bag and an automatic control mechanism. The liquid storage bag is fixed below the solid weight adjustment mechanism, and the liquid storage bag is connected with the automatic control mechanism, the automatic control mechanism is used for controlling injection of the weight liquid into the liquid storage bag or controlling discharge of the weight liquid in the liquid storage bag, so as to adjust the weight of the weight liquid in the liquid storage bag, and the total weight of the solid weight adjustment mechanism and the liquid storage bag meets the weight requirement of the pumping unit.

[0006] Preferably, the automatic control mechanism comprises a control unit, a liquid guide pipe, an electromagnetic valve, a liquid discharge pipe and an injection mechanism. One end of the liquid guide pipe is a first liquid inlet with an upward opening, and the other end of the liquid guide pipe is connected with the inside of the liquid storage bag through the electromagnetic valve. The inlet of one end of the liquid discharge pipe is connected with the liquid storage bag through the electromagnetic valve, and the other end of the liquid discharge pipe is a first liquid outlet with a downward opening. The injection mechanism is installed at the top of the pumping unit tower, and the injection mechanism is used for injecting the weight liquid into the liquid storage bag through the first liquid inlet and the liquid guide pipe. The electromagnetic valve and the injection mechanism are connected with the control unit for controlling start or stop of the electromagnetic valve and the injection mechanism.

[0007] Preferably, the injection mechanism comprises a liquid storage tank and a plunger pump. The liquid storage tank is connected with the plunger pump, and the plunger pump is connected with one end of a liquid outlet pipeline, and the other end of the liquid outlet pipeline is a second liquid outlet with a downward opening and corresponding to the first liquid inlet. The plunger pump is connected with the control unit.

[0008] Preferably, the lifting platform is further comprised. The lifting platform is fixed on one side of the pumping unit tower towards the liquid guide pipe, and the second liquid outlet of the liquid outlet pipeline is connected with the lifting platform. The control unit is connected with the lifting platform, and the lifting platform is used for adjusting the up-down position of the second liquid outlet.

[0009] Preferably, the recovery mechanism is further comprised. The recovery mechanism is arranged at the bottom of the pumping unit tower, and the recovery mechanism is connected with the injection mechanism, and the recovery mechanism is used for receiving the weight liquid discharged from the liquid storage bag and transmitting the weight liquid to the injection mechanism. The control unit is connected with the recovery mechanism for controlling start or stop of the recovery mechanism.

[0010] Preferably, the recovery mechanism comprises a recovery tank, a lifting pump and a liquid transmission pipeline. The top of the recovery tank is provided with a second liquid inlet, and the position of the second liquid inlet corresponds to the position of the first liquid outlet. The recovery tank is connected to one end of the infusion pipeline through the lifting pump, and the other end of the infusion pipeline is connected to the injection mechanism. The control unit is connected to the lifting pump.

[0011] Preferably, the control unit comprises a processor, a conversion circuit, a current detection circuit, and a control circuit. The processor is connected to the pumping unit motor through the conversion circuit and the current detection circuit. The processor is connected to the control circuit through the wireless transmission module, and the control circuit is connected to the electromagnetic valve. The processor is connected to the injection mechanism and the recovery mechanism.

[0012] Preferably, it further comprises a battery, a solar panel, and a wireless charging receiving plate. The solar panel and the wireless charging receiving plate are connected to the battery, and the battery is connected to the control circuit.

[0013] Preferably, the solid weight adjustment mechanism comprises a plurality of weight blocks. The plurality of weight blocks are stacked and detachably connected to each other through a connecting mechanism. A connecting frame is arranged on the top of the uppermost weight block, and the top of the connecting frame is connected to the pumping unit load belt through a rope hanger.

[0014] Preferably, the connecting mechanism comprises a screw rod and a nut. A plurality of through holes are vertically arranged on the weight block. An ear chamber corresponding to the through hole is arranged on the side wall of the weight block near the middle position, each through hole is in communication with its corresponding ear chamber, and one end of each ear chamber near the side wall of the weight block is an opening. The screw rod is inserted into the corresponding through holes of the adjacent two weight blocks, and the two ends of the screw rod are respectively located in the ear chambers of the adjacent two weight blocks. The nut is installed at the two ends of the screw rod through the openings of the ear chambers.

[0015] Preferably, it further comprises a recovery detection unit. The recovery detection unit is connected to the recovery tank, and the recovery detection unit is connected to the control unit. The recovery detection unit is used for detecting the real-time counterweight liquid level in the recovery tank and transmitting to the control unit. The control unit judges whether the real-time counterweight liquid level in the recovery tank reaches a predetermined recovery liquid level. If yes, the control unit controls the start of the lifting pump to transmit the counterweight liquid in the recovery tank to the injection mechanism.

[0016] Preferably, the liquid level alarm unit is further included. The liquid level alarm unit is connected with the liquid storage bag. The liquid level alarm unit is used for detecting the real-time counterweight liquid level in the liquid storage bag and judging whether the real-time counterweight liquid level reaches a first predetermined highest liquid level or a first predetermined lowest liquid level. If yes, the liquid level alarm unit alarms.

[0017] According to an aspect of the present application, a load counterweight adjustment method of a tower type pumping unit is provided, comprising: The initial weights of the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism are determined. The solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism with the initial weights are connected with the load belt of the tower type pumping unit. The automatic control mechanism detects the real-time current when the motor of the pumping unit operates and determines the current balance rate of the pumping unit according to the real-time current. The automatic control mechanism judges whether the deviation of the current balance rate exceeds a predetermined deviation. If yes, the automatic control mechanism controls the injection of the counterweight liquid into the liquid storage bag or controls the discharge of the counterweight liquid from the liquid storage bag according to the real-time current until the deviation of the current balance rate is less than or equal to the predetermined deviation, i.e., the total weight of the solid counterweight adjustment mechanism and the liquid storage bag meets the counterweight requirement of the pumping unit, and the load counterweight adjustment of the pumping unit is completed.

[0018] The present application has at least the following beneficial effects: The present application provides a load counterweight adjustment device and method of a tower type pumping unit. The solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism are provided to form a solid-liquid mixed type counterweight device combination. The weight of the counterweight is automatically adjusted without manual intervention, thereby improving the production efficiency and reducing the labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the technical solutions of the present application.

[0020] Figure 1 FIG. 1 shows a structure schematic diagram of a self-adjusting counterweight device combination according to an embodiment of the present application; Figure 2 FIG. 2 shows a top view of a counterweight block according to an embodiment of the present application; Figure 3Fig. 1 shows a schematic diagram of the operation state when injecting the counterweight liquid according to an embodiment of the present application; Figure 4 Fig. 2 shows a schematic diagram of the operation state when discharging the counterweight liquid according to an embodiment of the present application; Figure 5 Fig. 3 shows a schematic diagram of the equipment connection of the automatic control mechanism according to an embodiment of the present application.

[0021] In the figures, 1-standard counterweight, 2-first liquid inlet, 3-control circuit, 4-liquid storage bag, 5-carrier, 6-liquid guide pipe, 7-liquid discharge pipe, 8-solenoid valve, 9-through hole, 11-ear chamber, 13-screw, 14-nut, 15-connection frame, 16-hanger, 17-mounting hole, 18-gasket, 19-supplementary counterweight, 20-circular groove, 23-load belt, 24-liquid storage tank, 25-lifting platform, 26-liquid delivery pipeline, 27-tower, 28-second liquid inlet, 29-recovery tank, 30-lifting pump, 31-second liquid outlet, 32-plunger pump. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features, and aspects of the present application will be described herein below with reference to the accompanying drawings. The same reference numbers in the drawings represent the same elements or similar elements. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0023] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0024] The term "and / or" used herein only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the term "at least one" herein means any one of the plurality or any combination of at least two of the plurality, for example, including at least one of A, B, and C, which means including any one or more elements selected from the set consisting of A, B, and C.

[0025] In addition, in order to better illustrate the present application, numerous specific details are given in the following detailed description. Those skilled in the art should understand that the present application can also be implemented without certain specific details. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail, in order to highlight the main idea of the present application.

[0026] Figure 1 Fig. 4 shows a schematic diagram of the structure of the self-adjusting counterweight device combination according to an embodiment of the present application; Figure 2A top view of a counterweight block according to an embodiment of the present invention is shown; Figure 3 This diagram illustrates the operating state during the injection of counterweight fluid according to an embodiment of the present invention. Figure 4 This diagram illustrates the operating state during the discharge of the counterweight fluid according to an embodiment of the present invention. Figure 5 A schematic diagram of the equipment connection of the automatic control mechanism according to an embodiment of the present invention is shown. Figures 1-5 As shown, a load counterweight adjustment device for a tower-type pumping unit includes: a solid counterweight adjustment mechanism and a liquid counterweight adjustment mechanism; the top of the solid counterweight adjustment mechanism is connected to one end of the load belt 23 on the pumping unit tower 27; the liquid counterweight adjustment mechanism includes: a reservoir 4 and an automatic control mechanism; the reservoir 4 is fixed below the solid counterweight adjustment mechanism, and the reservoir 4 is connected to the automatic control mechanism, which controls the injection of counterweight liquid into the reservoir 4 or controls the discharge of counterweight liquid from the reservoir 4, thereby adjusting the weight of the counterweight liquid in the reservoir 4 so that the total weight of the solid counterweight adjustment mechanism and the reservoir 4 meets the counterweight requirements of the pumping unit.

[0027] In this embodiment of the invention, the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism together form a self-adjusting counterweight device assembly. The liquid storage bladder 4 is fixed below the solid counterweight adjustment mechanism by a bracket 5.

[0028] During installation, the initial weights of the solid and liquid counterweight adjustment mechanisms are set, and their total weight is the real-time counterweight. Since the counterweight adjustment is primarily performed through the liquid counterweight adjustment mechanism, the counterweight fluid in the reservoir 4 should ideally not be fully loaded or empty, allowing for easy adjustment of the counterweight by adding or removing counterweight fluid during pumping unit operation.

[0029] When the pumping unit is running normally, the motor starts and drives the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism's reservoir 4 to move up and down via the load belt 23. The automatic control mechanism is connected to the pumping unit motor. The automatic control mechanism obtains the real-time current parameters of the pumping unit motor during operation and, based on these parameters, determines whether the total weight of the solid counterweight adjustment mechanism and the reservoir 4 (including the internal counterweight liquid) meets the pumping unit's counterweight requirements. If not, the automatic control mechanism controls the injection or discharge of counterweight liquid into the reservoir 4 until the total weight of the solid counterweight adjustment mechanism and the reservoir 4 meets the pumping unit's counterweight requirements.

[0030] In the present application, the automatic control mechanism comprises a control unit, a liquid guide pipe 6, a solenoid valve 8, a liquid discharge pipe 7 and an injection mechanism; one end of the liquid guide pipe 6 is a first liquid inlet 2 with an upward opening, the other end of the liquid guide pipe 6 is connected to the inside of the liquid storage bag 4 through the solenoid valve 8; one end of the liquid discharge pipe 7 is connected to the liquid storage bag 4 through the solenoid valve 8, and the other end of the liquid discharge pipe 7 is a first liquid outlet with a downward opening; the injection mechanism is installed on the top of the pumping unit tower 27, and is used to inject the weight liquid into the liquid storage bag 4 through the first liquid inlet 2 and the liquid guide pipe 6; the solenoid valve 8 and the injection mechanism are connected to the control unit for controlling the start or stop of the solenoid valve 8 and the injection mechanism.

[0031] In the embodiment of the present application, the solenoid valve 8 is composed of three ports, one of which is a normally open liquid inlet hole, the other is connected to the other end of the liquid guide pipe 6 and the third port, and the third port is connected to the liquid storage bag 4, and the position of the third port is close to the bottom of the side wall of the liquid storage bag 4; the liquid guide pipe 6 can also be inserted into the inside of the liquid storage bag 4 through the first port and the third port, and extend a certain distance inside; the third port is connected to the one end of the liquid discharge pipe 7 through the electromagnetic mechanism, and is normally closed, and is connected to the second port when powered on; the third port is connected to the one end of the liquid discharge pipe 7.

[0032] The control unit is connected to the pumping unit motor, and the control unit obtains the real-time current parameters of the pumping unit motor during operation, and judges whether the total weight of the solid weight adjusting mechanism and the liquid storage bag 4 meets the pumping unit weight requirement, if not, the injection mechanism or the solenoid valve 8 is started to inject or discharge the weight liquid into the liquid storage bag 4.

[0033] When the weight liquid needs to be injected, the control unit controls the injection mechanism to start, and the weight liquid is transported into the liquid guide pipe 6 through the first liquid inlet 2, and then enters the inside of the liquid storage bag 4 through the first port and the second port of the solenoid valve 8.

[0034] When the weight liquid needs to be discharged, the control unit outputs current to control the electromagnetic mechanism between the second port and the third port of the solenoid valve 8 to open, and the weight liquid in the liquid storage bag 4 enters the liquid discharge pipe 7 through the second port and the third port of the solenoid valve 8, and is finally discharged from the first liquid outlet of the liquid discharge pipe 7.

[0035] When the control unit judges that the total weight of the solid weight adjusting mechanism and the liquid storage bag 4 meets the pumping unit weight requirement, the control unit controls the injection mechanism to stop injecting or controls the solenoid valve 8 to stop discharging the weight liquid.

[0036] In the present application, the injection mechanism comprises a liquid storage tank 24 and a plunger pump 32; the liquid storage tank 24 has a counterweight liquid inside, the liquid storage tank 24 is connected to the plunger pump 32, the plunger pump 32 is connected to one end of a liquid outlet pipeline, the other end of the liquid outlet pipeline is a second liquid outlet 31, the opening of the second liquid outlet 31 faces downward, and the position corresponds to the first liquid inlet 2; the plunger pump 32 is connected to the control unit.

[0037] In the embodiment of the present application, the top of the pumping unit tower 27 is provided with a liquid storage tank 24, the liquid storage tank 24 is connected to one end of a liquid outlet pipeline through a plunger pump 32, the other end of the liquid outlet pipeline passes through the top of the tower 27 downward, and the other end of the second liquid outlet 31 faces downward and corresponds to the first liquid inlet 2 of the liquid guide pipe 6.

[0038] When it is necessary to inject the counterweight liquid into the liquid storage bag 4, the self-adjusting counterweight device assembly moves upward to the top of the tower 27, at this time, the first liquid inlet 2 approaches the second liquid outlet 31. The control unit controls the plunger pump 32 to start, and the counterweight liquid in the liquid storage tank 24 is pumped out and transmitted to the second liquid outlet 31 through the liquid outlet pipeline. Since the position of the second liquid outlet 31 corresponds to the first liquid inlet 2, the counterweight liquid output by the second liquid outlet 31 is transported into the liquid storage bag 4 through the first liquid inlet 2 and the liquid guide pipe 6, thereby increasing the weight of the self-adjusting counterweight device assembly.

[0039] When the total weight of the solid counterweight adjusting mechanism and the liquid storage bag 4 meets the pumping unit counterweight requirement, the control unit controls the plunger pump 32 to stop running.

[0040] In the present application, it also comprises a lifting platform 25; the lifting platform 25 is fixed on one side of the top of the pumping unit tower 27 facing the liquid guide pipe 6, the second liquid outlet 31 of the liquid outlet pipeline is connected to the lifting platform 25; the control unit is connected to the lifting platform 25, and the lifting platform 25 is used to adjust the up-down height position of the second liquid outlet 31.

[0041] In the embodiment of the present application, the lifting platform 25 is a mechanical telescopic device controlled by a motor, and the lifting platform 25 is installed on the bottom surface of the top of the pumping unit tower 27. Before injecting the counterweight liquid, when the self-adjusting counterweight device assembly moves upward to the top of the tower 27, the control unit controls the lifting platform 25 to start, and drives the second liquid outlet 31 of the liquid outlet pipeline to move downward to contact the first liquid inlet of the liquid guide pipe 6, and after completion, the plunger pump 32 is controlled to start to inject the counterweight liquid.

[0042] The up-down position of the second liquid outlet 31 is adjusted through the telescopic lifting platform 25, thereby realizing the abutment and connection of the second liquid outlet 31 and the first liquid inlet 2, and avoiding the leakage of the counterweight liquid in the liquid transmission process.

[0043] In the present application, a recovery mechanism is further included; the recovery mechanism is arranged at the bottom of the oil pumping machine tower 27, and is connected to the injection mechanism; the recovery mechanism is used to receive the weight liquid discharged from the liquid storage bag 4, and transmit the weight liquid to the injection mechanism; the recovery mechanism is connected to the control unit for controlling the start or stop of the recovery mechanism.

[0044] In the present application, the recovery mechanism includes a recovery tank 29, a lifting pump 30 and a liquid transmission pipeline 26; the top of the recovery tank 29 is provided with a second liquid inlet 28, and the position of the second liquid inlet 28 corresponds to the position of the first liquid outlet; the recovery tank 29 is connected to one end of the liquid transmission pipeline 26 through the lifting pump 30, and the other end of the liquid transmission pipeline 26 is connected to the injection mechanism; the control unit is connected to the lifting pump 30.

[0045] In the embodiment of the present application, the bottom of the oil pumping machine tower 27 is provided with the recovery tank 29, the recovery tank 29 is connected to one end of the liquid transmission pipeline 26 through the lifting pump 30, and the other end of the liquid transmission pipeline 26 is connected to the liquid storage tank 24 at the top of the tower 27.

[0046] When it is necessary to discharge the weight liquid in the liquid storage bag 4, the self-adjusting weight device assembly moves downward to the position close to the bottom of the tower 27, at which time the first liquid outlet approaches the second liquid inlet 28. The control unit controls the electromagnetic valve 8 to open, so that the weight liquid in the liquid storage bag 4 is discharged through the first liquid outlet of the liquid discharge pipe 7. Since the first liquid outlet corresponds to the second liquid inlet 28, the weight liquid discharged through the first liquid outlet enters the recovery tank 29 through the second liquid inlet 28, thereby reducing the weight of the self-adjusting weight device assembly.

[0047] In the present application, the control unit includes a processor, a conversion circuit, a current detection circuit and a control circuit 3; the processor is connected to the oil pumping machine motor through the conversion circuit and the current detection circuit; the processor is connected to the control circuit 3 through a wireless transmission module, the control circuit 3 is connected to the electromagnetic valve 8; the processor is connected to the injection mechanism and the recovery mechanism.

[0048] In the embodiment of the present application, the processor (CPU) is connected to the plunger pump 32, the lifting pump 30 and the lifting platform 25 respectively. The wireless transmission module includes a wireless transmitting circuit connected to the processor and a wireless receiving circuit connected to the control circuit 3.

[0049] After the oil pumping machine motor is started, the real-time current during the operation of the motor is detected by the current detection circuit, and is transmitted to the conversion circuit. The conversion circuit converts the analog signal of the real-time current into a digital signal, and transmits the digital signal to the processor.

[0050] The processor determines whether the total weight of the solid weight adjusting mechanism and the liquid storage bag 4 meets the pumping unit weight requirement according to the real-time current, and if not, controls injection or discharge of the weight liquid in the liquid storage bag 4 until the weight requirement is met.

[0051] When the weight liquid needs to be injected, the processor controls the lifting platform 25 to start and drive the second liquid outlet 31 to move downward to contact the first liquid outlet when the self-adjusting weight device combination moves close to the top of the tower 27; the processor controls the plunger pump 32 to start and deliver the weight liquid in the liquid storage tank 24 to the liquid storage bag 4 through the liquid storage pipeline and the liquid guide pipe 6. The processor determines whether the weight requirement is met after the weight liquid is injected, and controls the plunger pump 32 to stop running.

[0052] When the weight liquid needs to be discharged, the processor sends a discharge signal to the control circuit 3 through the wireless transmission module when the self-adjusting weight device combination is driven to be close to the bottom of the tower 27; the control circuit 3 receives the discharge signal and controls the electromagnetic valve 8 to open, so that the weight liquid in the liquid storage tank 24 is delivered to the recovery tank 29 through the discharge pipeline 7. The processor determines whether the weight requirement is met after the weight liquid is discharged, and sends a stop discharge signal to the control circuit 3 through the wireless transmission module; the control circuit 3 receives the stop discharge signal and controls the electromagnetic valve 8 to close.

[0053] In the present application, a battery, a solar panel and a wireless charging receiving plate are further included; the solar panel and the wireless charging receiving plate are connected to the battery, and the battery is connected to the control circuit 3.

[0054] In the embodiment of the present application, the solar panel is used to charge the battery by solar power generation, and the battery provides power for the wireless receiving circuit and the control circuit 3. Since the control circuit 3 needs to control the electromagnetic valve 8 installed on the liquid storage bag 4, the control circuit 3 is fixed on the top of the solid weight adjusting mechanism, and it is inconvenient to directly connect the power supply on the solid weight adjusting mechanism or replace the battery during the operation of the pumping unit. Therefore, the solar power generation is adopted for self-power generation, which can improve the production efficiency and save energy. In addition to the solar charging, the battery can also be instantaneously charged through the wireless charging receiving plate.

[0055] In the present application, the solid weight adjusting mechanism includes a plurality of weight blocks; the plurality of weight blocks are stacked and detachably connected to each other through a connecting mechanism; a connecting frame 15 is arranged on the top of the uppermost weight block, and the top of the connecting frame 15 is connected to the pumping unit load belt 23 through a suspension rope device.

[0056] In the embodiment of the present application, the counterweights include standard counterweights 1 and supplementary counterweights 19. The standard counterweights 1 are combined in a modular manner to form a main counterweight unit, and the supplementary counterweights 19 are lighter than the standard counterweights 1. The supplementary counterweights 19 are installed below the main counterweight unit. If the mass of a single standard counterweight 1 combined with a predetermined fixed counterweight part is different from the counterweight value of the fixed counterweight part, the supplementary counterweight 19 can be added as appropriate, thereby completing the combination of the fixed counterweight part of the self-adjustable counterweight device assembly.

[0057] Four mounting holes 17 for mounting the connecting frame 15 are arranged in the central position of the uppermost counterweight. Circular grooves 20 for placing nuts and washers are arranged on the bottom surface of the counterweight in positions corresponding to the mounting holes 17, and the mounting holes 17 are located in the circular grooves 20.

[0058] During installation, a screw is passed through the connecting frame 15 and the mounting hole 17 on the counterweight, the bottom end of the screw is located in the circular groove 20, and a nut and a washer are installed at the bottom end of the screw, thereby connecting and fixing the connecting frame 15 and the counterweight. A hanger 16 is arranged on the connecting frame 15, and the pumping unit load belt 23 is connected through the hanger 16.

[0059] In the present application, the connecting mechanism includes a screw rod 13 and a nut 14. A plurality of through holes 9 are vertically arranged on the counterweight. Ear chambers 11 corresponding to the through holes 9 are arranged near the middle position on the side wall of the counterweight. Each through hole 9 communicates with its corresponding ear chamber 11, and each ear chamber 11 is open at one end near the side wall of the counterweight. The screw rod 13 is inserted into the corresponding through holes 9 of two adjacent counterweights, and the two ends of the screw rod 13 are located in the ear chambers 11 of the two adjacent counterweights. The nut 14 is installed at the two ends of the screw rod 13 through the openings of the ear chambers 11.

[0060] In the embodiment of the present application, four groups of eight vertical through holes 9 are arranged near the edge positions on the counterweight, and semicircular ear chambers 11 are arranged near the central position on the counterweight in positions corresponding to each through hole 9, i.e., the semicircular ear chambers 11 divide the through holes 9 into upper and lower parts.

[0061] When two adjacent counterweights are connected, the screw rod 13 is passed through the lower part through hole 9 of the upper counterweight and the upper part through hole 9 of the lower counterweight, and the two ends of the screw rod 13 are located in the two ear chambers 11 of the two adjacent counterweights. The nut 14 and the washer 18 are installed at the two ends of the screw rod 13, thereby fixing and connecting the two counterweights together. A plurality of counterweights are combined in a stack, and are connected in the above-mentioned manner.

[0062] The liquid storage bag 4 bracket 5 is also connected to the through hole 9 of the bottommost counterweight through the screw rod 13, the washer 18, and the nut 14.

[0063] In the present application, further comprising a recovery detection unit; the recovery detection unit is connected with the recovery tank 29, the recovery detection unit is connected with the control unit; the recovery detection unit is used for detecting the real-time weight liquid level in the recovery tank 29 and transmitting to the control unit, the control unit judges whether the real-time weight liquid level in the recovery tank 29 reaches the predetermined recovery liquid level, if yes, the control unit controls the start of the lifting pump 30, and the weight liquid in the recovery tank 29 is transmitted to the injection mechanism.

[0064] In the embodiment of the present application, the recovery detection unit is connected with the processor, wherein the recovery detection unit can be a liquid level sensor or a liquid level switch, which can detect the real-time weight liquid level in the recovery tank 29.

[0065] The processor judges whether the real-time weight liquid level in the recovery tank 29 reaches the predetermined recovery liquid level according to the real-time weight liquid level detected by the recovery detection unit, and controls the start of the lifting pump 30 when the real-time weight liquid level reaches the predetermined recovery liquid level, so that the weight liquid in the recovery tank 29 is transmitted to the liquid storage tank 24 through the liquid delivery pipeline 26, thereby realizing recycling.

[0066] The processor judges whether the real-time weight liquid level in the recovery tank 29 is lower than the second predetermined minimum liquid level according to the real-time weight liquid level detected by the recovery detection unit, and prohibits the start of the lifting pump 30 when the real-time weight liquid level in the recovery tank 29 is lower than the second predetermined minimum liquid level, and sends a prompt message.

[0067] In the present application, further comprising a liquid level alarm unit; the liquid level alarm unit is connected with the liquid storage bag 4, and the liquid level alarm unit is used for detecting the real-time weight liquid level in the liquid storage bag 4, judging whether it reaches the first predetermined maximum liquid level or the first predetermined minimum liquid level, and if yes, an alarm is performed.

[0068] In the embodiment of the present application, the liquid level alarm unit is connected with the processor of the control unit, and the liquid level alarm unit can be a liquid level sensor or a liquid level switch, which is used for detecting the real-time liquid level (real-time weight liquid level) of the weight liquid in the liquid storage bag 4 and sending to the processor.

[0069] If the processor judges that the real-time liquid level reaches the first predetermined maximum liquid level, the processor controls an alarm to be performed and controls the plunger pump 32 to stop running at the same time, thereby realizing full load monitoring and alarm. If the weight liquid in the liquid storage bag 4 has reached the maximum liquid level and cannot continue to be injected, the number of weight blocks of the fixed weight adjusting mechanism needs to be increased to achieve the purpose of weight increase.

[0070] If the processor judges that the real-time liquid level reaches the first predetermined minimum liquid level, the processor controls an alarm to be performed and controls the electromagnetic valve 8 to be closed at the same time, thereby realizing empty load monitoring and alarm. If the weight liquid in the liquid storage bag 4 has reached the minimum liquid level and cannot discharge more weight liquid, the number of weight blocks of the fixed weight adjusting mechanism needs to be reduced to achieve the purpose of weight reduction.

[0071] In the embodiment of the present application, the processor is connected to the external pumping unit parameter remote terminal control system (RTU), the RTU is connected to each sensor of the liquid level detection unit and the sensor of the recovery detection unit, and the processor can manage the weight self-adjusting control of the counterweight through the pumping unit field RTU with the whole machine supervision capability, and realize the automatic adjustment function of the self-adjusting counterweight device combination weight.

[0072] The storage capacity of the counterweight liquid in the liquid storage tank 4 can be converted through current monitoring data, or full load monitoring and alarm can be realized by setting a liquid level switch at the corresponding position of the liquid guide pipe 6, prompting the next step of adjusting the counterweight block on the self-adjusting counterweight device combination to ensure that the self-adjusting counterweight device combination can continuously perform self-adjusting work.

[0073] In the embodiment of the present application, a liquid level monitoring unit is installed in the liquid storage tank 24 at the top of the tower 27, which can be a liquid level sensor or a liquid level switch. The liquid level monitoring unit is connected to the processor of the control unit, and the liquid level monitoring unit detects the real-time counterweight liquid level in the liquid storage tank 24 and sends it to the processor. When the real-time counterweight liquid level in the liquid storage tank 24 is less than the third predetermined minimum liquid level, the processor automatically controls the start of the lifting pump 30 to lift the counterweight liquid stored in the recovery tank 29 at the bottom of the tower 27 into the liquid storage tank 24 and reach the predetermined liquid level.

[0074] In the embodiment of the present application, the structure changes of the injection mechanism, the recovery mechanism and the like are not limited to the above description. For example, the injection mechanism can also be arranged at the bottom of the tower 27, and the combination of the plunger pump 32 placed at the bottom and the liquid discharge hole can realize the self-adjustment of the liquid part of the counterweight device combination, or the injection and discharge of the counterweight liquid during the operation of the pumping unit can be realized by directly connecting through a hose and the like.

[0075] In the present application, a load counterweight adjustment method of a tower type pumping unit, comprising: step S01: determining the initial weight of the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism, connecting the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism with the initial weight to the load belt 23 of the tower 27 type pumping unit; step S02: the automatic control mechanism detects the real-time current when the pumping unit motor operates, and determines the current balance rate of the pumping unit according to the real-time current; step S03: the automatic control mechanism judges whether the deviation of the current balance rate exceeds the predetermined deviation, if yes, the automatic control mechanism controls the injection of the counterweight liquid into the liquid storage tank 4 or controls the discharge of the counterweight liquid in the liquid storage tank 4 according to the real-time current, until the deviation of the current balance rate is less than or equal to the predetermined deviation, that is, the total weight of the solid counterweight adjustment mechanism and the liquid storage tank 4 meets the counterweight requirement of the pumping unit, and the load counterweight adjustment of the pumping unit is completed.

[0076] In the embodiment of the present application, after the solid weight adjustment mechanism and the liquid weight adjustment mechanism are connected with the load belt 23 of the tower 27 type pumping unit, the pumping unit motor is started to run. During the running process, the processor collects the real-time current parameters of the pumping unit motor running through the current detection circuit, and provides the data to the processor CPU through the conversion circuit for continuous calculation and storage of the current balance rate. The CPU outputs abnormal parameters and judges whether the deviation of the current balance rate exceeds the predetermined deviation (proportion). The predetermined deviation is 30%.

[0077] If yes, the processor of the automatic control mechanism determines to inject the counterweight liquid into the liquid storage bag 4 or control the discharge of the counterweight liquid in the liquid storage bag 4 according to the collected real-time current of the motor. The method comprises: the automatic control mechanism compares the real-time current value of the motor with the motor current value when the load and the counterweight of the pumping unit reach balance. If the real-time current value is greater than the motor current value when the load and the counterweight reach balance, the discharge of the counterweight liquid in the liquid storage bag 4 is controlled. If the real-time current value is less than the motor current value when the load and the counterweight reach balance, the injection of the counterweight liquid into the liquid storage bag 4 is controlled.

[0078] The control of the injection and discharge of the counterweight liquid is to perform the corresponding loading or unloading operation. Therefore, the weight self-adjusting method of the self-adjusting counterweight device combination is divided into two parts of unloading and loading. Specifically: When unloading, the processor controls the discharge of the liquid to reduce the weight, that is, the processor sends an unloading instruction to the control circuit 3 through the wireless transmission module. When the self-adjusting counterweight device combination runs close to the bottom of the tower 27 each time, the control circuit 3 controls the electromagnetic valve 8 to open rapidly in the time difference of the reversing of the direct drive motor of the pumping unit, so that the counterweight liquid in the liquid storage bag 4 is discharged downward to the recovery tank 29 through the liquid discharge pipe 7, thereby reducing the weight of the self-adjusting counterweight device combination. When the counterweight device combination is turned to be lifted in advance, the control circuit 3 controls the electromagnetic valve 8 to close to stop the discharge of the liquid.

[0079] The unloading operation is performed through continuous repeated operations. The processor of the automatic control mechanism continuously collects the real-time current data of the pumping unit to calculate the balance rate of the pumping unit. When the deviation of the balance rate is less than or equal to the predetermined deviation, the processor sends a stop operation instruction through the wireless transmission module, and controls the electromagnetic valve 8 to close to stop the discharge operation through the control circuit 3, so as to realize the automatic adjustment of the weight unloading of the self-adjusting counterweight device combination.

[0080] At loading, the processor controls to add weight; the processor sends the filling preparation instruction to control the lifting platform 25 to start the second liquid outlet 31 of the liquid outlet pipeline to stretch out in advance, and the second liquid outlet 31 is inserted into the first liquid inlet 2 when the self-adjusting weight device combination runs close to the top of the tower 27 each time; the processor sends the instruction to control the plunger pump 32 to start pressurization, and the weight liquid in the liquid storage tank 24 is transported to the liquid storage bag 4 through the liquid guide pipe 6 to add the weight liquid, and the self-adjusting weight device combination is lowered after the pumping unit motor completes the top reversing operation, the processor controls the plunger pump 32 to be closed to stop adding the weight liquid.

[0081] The filling operation is carried out through continuous repeated operation until the processor judges that the balance rate deviation is less than or equal to the predetermined deviation, and the CPU processing circuit sends the stop operation instruction to control the lifting platform 25 to retract, so that the weight loading of the weight device combination is automatically adjusted.

[0082] In the embodiment of the application, the weight liquid is water or a mixed liquid containing a predetermined proportion of ethylene glycol and water, the mixed liquid has a lower freezing point and stable density, can flow normally in a low-temperature environment, and realizes the use as a low-cost weight. In a warm area, the weight liquid used can be selected as clean water, and the recovery link is cancelled to reduce the cost, that is, the recovery mechanism is removed, and the overweight clean water can be discharged at any time without pollution.

[0083] It can be understood that the above-mentioned various embodiments mentioned in the application can be combined with each other to form a combined embodiment without violating the principle logic, and the application will not be described again due to the limited length.

[0084] It can be understood by those skilled in the art that in the above-mentioned method of the specific embodiment, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process, and the specific execution order of each step should be determined according to its function and possible internal logic.

[0085] The application aims at the frequent weight adjustment problem of the tower 27 type pumping unit, a new weight device combination is formed through a solid-liquid mixing mode, and the weight of the weight is automatically adjusted without manual intervention in a non-stop state through the liquid automatic adjustment device and method.

[0086] The present application has at least the following advantages: 1. The self-adjusting counterweight device combination can set a fixed counterweight combination mode according to the actual load prediction of the tower 27 machine. For example, the normal load change rate is about 10%. The present counterweight combination can select 80% fixed counterweight combination (solid counterweight adjusting mechanism) and 10-30% liquid counterweight liquid combination (liquid counterweight adjusting mechanism) to realize automatic adjustment of the counterweight. 2. The adjustment trigger point is set. When the load current changes (balance rate deviation) reaches a certain proportion, the adjustment mechanism is triggered, and the control unit controls the electromagnetic valve 8 or the plunger pump 32 and the lifting platform 25 to combine and adjust the delivery of the counterweight liquid, so as to achieve the purpose of increasing or reducing the weight of the self-adjusting counterweight device combination, thereby realizing self-adjustment of the counterweight, avoiding manual intervention, and reducing the labor intensity of equipment operation and maintenance. 3. By using the counterweight liquid containing ethylene glycol to circulate and repeatedly recover on the device, the material cost is reduced. 4. The liquid storage bag 4 at the bottom of the self-adjusting counterweight device combination and the liquid storage bag 4 bracket 5 structure can be used as a fall prevention and buffering structure to protect the safety of the solid counterweight part of the counterweight device combination, avoid secondary disasters caused by belt breakage and counterweight load falling accidents, and reduce the risk of equipment operation.

[0087] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical application, or technical improvement in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A load counterweight adjustment device for a tower-type pumping unit, characterized in that, include: Solid counterweight adjustment mechanism and liquid counterweight adjustment mechanism; The top of the solid counterweight adjustment mechanism is connected to one end of the load belt (23) on the pumping unit tower (27); The liquid counterweight adjustment mechanism includes: a liquid storage bladder (4) and an automatic control mechanism; The reservoir (4) is fixed below the solid counterweight adjustment mechanism. The reservoir (4) is connected to the automatic control mechanism. The automatic control mechanism is used to control the injection of counterweight liquid into the reservoir (4) or to control the discharge of counterweight liquid from the reservoir (4), thereby adjusting the weight of the counterweight liquid in the reservoir (4) so ​​that the total weight of the solid counterweight adjustment mechanism and the reservoir (4) meets the counterweight requirements of the pumping unit.

2. The load counterweight adjustment device for a tower-type pumping unit according to claim 1, characterized in that, The automatic control mechanism includes: a control unit, a liquid guide tube (6), a solenoid valve (8), a liquid drain tube (7), and an injection mechanism; One end of the liquid guide tube (6) is a first liquid inlet (2) with the opening facing upwards, and the other end of the liquid guide tube (6) is connected to the inside of the liquid storage bladder (4) through the solenoid valve (8). The inlet of one end of the drain pipe (7) is connected to the reservoir (4) through the solenoid valve (8), and the other end of the drain pipe (7) is the first outlet, with the opening of the first outlet facing downwards. The injection mechanism is installed on the top of the pumping unit tower (27) and is used to inject the counterweight liquid into the reservoir (4) through the first inlet (2) and the guide pipe (6). The solenoid valve (8) and the injection mechanism are connected to the control unit for controlling its start-up or shutdown.

3. The load counterweight adjustment device for a tower-type pumping unit according to claim 2, characterized in that, The injection mechanism includes: a liquid storage tank (24) and a plunger pump (32); The storage tank (24) contains a counterweight liquid. The storage tank (24) is connected to the plunger pump (32). The plunger pump (32) is connected to one end of the liquid outlet pipeline. The other end of the liquid outlet pipeline is the second liquid outlet (31). The opening of the second liquid outlet (31) faces downward and its position corresponds to the first liquid inlet (2). The plunger pump (32) is connected to the control unit.

4. The load counterweight adjustment device for a tower-type pumping unit according to claim 3, characterized in that, Also includes: Lifting platform (25); The lifting platform (25) is fixed on the top of the pumping unit tower (27) on the side facing the liquid guide pipe (6), and the second liquid outlet (31) of the liquid outlet pipe is connected to the lifting platform (25). The control unit is connected to the lifting platform (25), which is used to adjust the vertical position of the second liquid outlet (31).

5. The load counterweight adjustment device for a tower-type pumping unit according to claim 3, characterized in that, Also includes: Recycling organizations; The recovery mechanism is located at the bottom of the pumping unit tower (27). The recovery mechanism is connected to the injection mechanism. The recovery mechanism is used to receive the counterweight liquid discharged from the reservoir (4) and transfer the counterweight liquid to the injection mechanism. The recycling mechanism is connected to the control unit for controlling its start-up or shutdown.

6. The load counterweight adjustment device for a tower-type pumping unit according to claim 5, characterized in that, The recycling mechanism includes: a recycling tank (29), a booster pump (30), and an infusion pipeline (26); The top of the recycling tank (29) is provided with a second liquid inlet (28), and the position of the second liquid inlet (28) corresponds to the position of the first liquid outlet; The recovery tank (29) is connected to one end of the infusion line (26) via the booster pump (30), and the other end of the infusion line (26) is connected to the injection mechanism; The control unit is connected to the booster pump (30).

7. The load counterweight adjustment device for a tower-type pumping unit according to claim 2, characterized in that, The control unit includes: a processor, a conversion circuit, a current detection circuit, and a control circuit (3); The processor is connected to the pumping unit motor via a conversion circuit and a current detection circuit. The processor is connected to the control circuit (3) via a wireless transmission module, and the control circuit (3) is connected to the solenoid valve (8). The processor is connected to the injection mechanism and the recovery mechanism.

8. The load counterweight adjustment device for a tower-type pumping unit according to claim 7, characterized in that, Also includes: Storage batteries, solar panels, and wireless charging receivers; The solar panel and the wireless charging receiver are connected to the battery, and the battery is connected to the control circuit (3).

9. The load counterweight adjustment device for a tower-type pumping unit according to claim 1, characterized in that, The solid counterweight adjustment mechanism includes: a plurality of counterweight blocks; The plurality of counterweights are stacked and detachably connected to each other by a connecting mechanism. A connecting frame (15) is provided on the top of the counterweight block at the top and the top of the connecting frame (15) is connected to the load belt (23) of the pumping unit through a suspension rope.

10. The load counterweight adjustment device for a tower-type pumping unit according to claim 9, characterized in that, The connecting mechanism includes: a screw (13) and a nut (14); Several through holes (9) are vertically arranged on the counterweight block; An ear chamber (11) corresponding to the through hole (9) is provided on the side wall of the counterweight near the middle position. Each through hole (9) is connected to its corresponding ear chamber (11), and one end of each ear chamber (11) near the side wall of the counterweight is open. Insert the screw (13) into the through hole (9) corresponding to the two adjacent counterweights, with the two ends of the screw (13) respectively located in the ear chamber (11) of the two adjacent counterweights; The nut (14) is installed at both ends of the screw (13) through the opening of the ear chamber (11).

11. The load counterweight adjustment device for a tower-type pumping unit according to claim 6, characterized in that, It also includes a recycling detection unit; The recycling detection unit is connected to the recycling tank (29), and the recycling detection unit is connected to the control unit; The recycling detection unit is used to detect the real-time counterweight liquid level in the recycling tank (29) and transmit it to the control unit. The control unit determines whether the real-time counterweight liquid level in the recycling tank (29) has reached the predetermined recycling liquid level. If so, it controls the lifting pump (30) to start and transmit the counterweight liquid in the recycling tank (29) to the injection mechanism.

12. The load counterweight adjustment device for a tower-type pumping unit according to any one of claims 1-11, characterized in that, It also includes a liquid level alarm unit; The liquid level alarm unit is connected to the liquid storage bladder (4). The liquid level alarm unit is used to detect the real-time counterweight liquid level in the liquid storage bladder (4) and determine whether it has reached the first predetermined maximum liquid level or the first predetermined minimum liquid level. If it is, an alarm is triggered.

13. A method for adjusting the load counterweight of a tower-type pumping unit, characterized in that, include: Determine the initial weights of the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism, and connect the initial weights of the solid counterweight adjustment mechanism and the liquid counterweight adjustment mechanism to the load belt (23) of the tower (27) type pumping unit; The automatic control mechanism detects the real-time current of the pumping unit motor during operation and determines the current balance rate of the pumping unit based on the real-time current. The automatic control mechanism determines whether the deviation of the current balance rate exceeds the predetermined deviation. If so, the automatic control mechanism controls the injection of counterweight liquid into the reservoir (4) or controls the discharge of counterweight liquid into the reservoir (4) according to the real-time current, until the deviation of the current balance rate is less than or equal to the predetermined deviation. That is, the total weight of the solid counterweight adjustment mechanism and the reservoir (4) meets the counterweight requirements of the pumping unit, and the load counterweight adjustment of the pumping unit is completed.

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