CN117027738B - Balance monitoring and automatic regulating device for tower type oil pumping unit - Google Patents
Balance monitoring and automatic regulating device for tower type oil pumping unit Download PDFInfo
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- CN117027738B CN117027738B CN202310999990.3A CN202310999990A CN117027738B CN 117027738 B CN117027738 B CN 117027738B CN 202310999990 A CN202310999990 A CN 202310999990A CN 117027738 B CN117027738 B CN 117027738B
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- 238000005086 pumping Methods 0.000 title claims abstract description 93
- 238000012544 monitoring process Methods 0.000 title claims abstract description 54
- 230000001105 regulatory effect Effects 0.000 title description 5
- 230000009471 action Effects 0.000 claims abstract description 72
- 230000000875 corresponding effect Effects 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims description 106
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 6
- 230000008602 contraction Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
Abstract
The utility model relates to the technical field of petroleum lifting equipment matched equipment, in particular to a balance monitoring and automatic adjusting device of a tower type pumping unit, which comprises a signal mechanism arranged on one side of a distribution box of the tower type pumping unit and an executing mechanism arranged on a platform of the tower type pumping unit; the signal mechanism comprises a current monitoring module for detecting the maximum current of the up-down stroke of the tower-type pumping unit, a balance rate analysis module for judging the balance condition and an action command module for sending a corresponding action command according to the balance condition; the actuating mechanism comprises a low-speed motor for providing power and a telescopic control assembly for executing action instructions; the telescopic control assembly comprises a low-speed gear telescopic structure and a telescopic screw pair, and the telescopic screw pair is controlled to extend or retract by the low-speed gear telescopic structure according to the action instruction, so that the telescopic screw pair is contacted with a belt for driving the balancing weight to adjust balance. The utility model can realize remote automatic adjustment, is convenient to apply and has strong practicability.
Description
Technical Field
The utility model relates to the technical field of petroleum lifting equipment matched equipment, in particular to a balance monitoring and automatic adjusting device of a tower type pumping unit.
Background
The most widely used method for monitoring balance and balancing the tower type pumping unit in the oilfield at present is to test current, calculate balance rate and change the balancing weight of the tower type pumping unit on site by staff, thereby changing the lower current to regulate balance.
Chinese patent publication No.: CN203925436U discloses a tower type pumping unit, before implementing balance adjustment in application, on-site staff needs to measure maximum current of up and down strokes in a distribution box of the pumping unit respectively by using an ammeter, calculate balance rate and judge balance condition, if the balance condition is in an under-balance state, the on-site staff adjusts balance by adding sand or other balancing weights into a balancing box; if in the state of over-balance, on-site staff adjusts the balance by reducing sand or other balancing weights into the weight box. When the method is applied, firstly, the weight is required to be increased or decreased more accurately, sometimes the weight is required to be adjusted for multiple times, and the current is required to be measured repeatedly, so that the accurate adjustment balance is ensured, the site construction efficiency is limited, and certain requirements are provided for the experience of construction staff; secondly, under the influence of severe weather roads such as flood season, rainy season, the balance problem of the pumping unit is difficult to discover in time, and electric quantity loss is caused, and loss is brought to the oil field.
Disclosure of Invention
Therefore, the utility model provides a balance monitoring and automatic adjusting device for a tower type pumping unit, which is used for solving the problems that the balance of the tower type pumping unit cannot be adjusted remotely, intelligently and in real time due to the current situation that severe weather and personnel are reduced and experience of part of professional operators is insufficient in the prior art.
In order to achieve the above object, the present utility model provides a balance monitoring and automatic adjusting device for a tower type pumping unit, comprising:
the signal mechanism is arranged at one side of the power distribution box of the tower-type pumping unit, and the actuating mechanism is arranged on the platform of the tower-type pumping unit;
the signal mechanism comprises a current monitoring module which is connected with the power distribution box of the tower type pumping unit through a current input wire and used for detecting the maximum current of the up-down stroke of the tower type pumping unit, a balance rate analysis module which is connected with the current monitoring module and used for calculating the balance rate according to the maximum current of the up-down stroke and judging the balance condition, and an action command module which is connected with the balance rate analysis module and used for sending a corresponding action command according to the analysis result of the balance rate analysis module;
the actuating mechanism comprises a low-speed motor which is connected with the action command module through an output action line and used for providing corresponding power according to the action command, and a telescopic control assembly which is connected with the low-speed motor and used for executing the action command; the telescopic control assembly comprises a low-speed gear telescopic structure and a telescopic screw pair, and the telescopic screw pair is controlled to extend or retract by the low-speed gear telescopic structure according to the action instruction, so that the telescopic screw pair is contacted with a belt for driving the balancing weight to adjust balance;
and the action command module calculates the difference value between the balance rate and the corresponding balance rate threshold value under the condition that the balance rate exceeds the balance rate threshold value interval so as to select a determination mode of the displacement amount of the telescopic screw pair, selects the corresponding preset displacement amount according to the ratio of the difference value to the standard difference value as the displacement amount of the telescopic screw pair in a first displacement determination mode, or selects the corresponding adjustment coefficient according to the value level of the difference value in a second displacement determination mode so as to determine the displacement amount of the telescopic screw pair.
Further, a balance rate threshold interval is set in the balance rate analysis module, the balance rate threshold interval includes a balance rate minimum threshold and a balance rate maximum threshold, if the balance rate is smaller than the balance rate minimum threshold, the balance rate analysis module determines that the tower type pumping unit is in an under-balanced state, and if the balance rate is larger than the balance rate maximum threshold, the balance rate analysis module determines that the tower type pumping unit is in an over-balanced state.
Further, the balance rate analysis module sets an initial balance rate corresponding to the belt in a vertical state to be within a balance rate threshold interval.
Further, the current monitoring module detects the maximum current of the up-and-down stroke of the tower-type pumping unit under the condition that the belt is in a vertical state so as to calculate the balance rate in real time, if the balance rate calculated by the balance rate analysis module is smaller than the minimum threshold value of the balance rate, the tower-type pumping unit is judged to be in an unbalanced state, and the action command module sends an action command extending out of the telescopic screw pair so that the telescopic screw pair supports the belt driving the balancing weight to adjust balance; and if the balance rate calculated by the balance rate analysis module is greater than or equal to the lowest balance rate threshold, the current monitoring module continues to detect the maximum current of the up-down stroke of the tower-type pumping unit.
Further, the current monitoring module detects maximum current of up and down strokes of the tower type pumping unit in a state that the belt is supported so as to calculate a balance rate in real time, wherein,
if the balance rate calculated by the balance rate analysis module is smaller than the lowest balance rate threshold, judging that the tower type pumping unit is in an unbalanced state, and sending an action instruction extending out of the telescopic spiral pair by the action instruction module;
if the balance rate calculated by the balance rate analysis module is greater than the highest balance rate threshold, judging that the tower type oil pumping unit is in an overbalanced state, and sending an action instruction for shrinking the telescopic spiral pair by the action instruction module;
the supporting state is that the telescopic spiral pair supports the belt.
Further, the action command module calculates the displacement quantity of the expansion of the telescopic screw pair according to the balance rate too low difference value of the balance rate and the lowest balance rate threshold in the unbalanced state, and calculates the displacement quantity of the contraction of the telescopic screw pair according to the balance rate too high difference value of the balance rate and the highest balance rate threshold in the unbalanced state.
Further, the action command module compares the difference value with a preset standard difference value, and selects a determination mode for the displacement of the telescopic screw pair according to the comparison result, wherein,
under the first displacement determination mode, the action command module selects a corresponding preset displacement amount as the displacement amount of the telescopic screw pair according to the ratio of the difference value to the standard difference value;
the first displacement determining mode meets the condition that the difference value is larger than or equal to a standard difference value;
the difference is a balance rate too low difference or a balance rate too high difference.
Further, in the second displacement determining mode, the action command module selects a corresponding adjustment coefficient according to the value level of the difference value to determine the displacement of the telescopic screw pair;
the second displacement determination means satisfies that the difference is smaller than a standard difference.
Further, the displacement amount of the telescopic screw pair shrinkage calculated by the action command module in the supporting state is larger than or equal to the maximum distance of the belt from the vertical state, so that the belt is restored to the vertical state.
Further, the balance monitoring and automatic adjusting device of the tower type oil pumping unit further comprises an early warning module, wherein the early warning module is connected with the balance rate analysis module, and if the belt is in a vertical state or the balance rate corresponding to the maximum extension length of the telescopic screw pair exceeds a balance rate threshold interval, the early warning module sends out alarm information.
Compared with the prior art, the balance monitoring and automatic adjusting device for the tower type pumping unit has the beneficial effects that the signal mechanism is used for replacing staff to measure current and calculate balance rate, the executing mechanism is used for replacing staff to increase and decrease balance sand or balancing weight on site to adjust balance, real-time and remote monitoring on the balance condition of the tower type pumping unit is realized, the defects of personnel deficiency, bad weather, road influence and other factors that staff go to a well to monitor current and adjust balance in time are overcome, and power consumption loss is reduced; meanwhile, the actuating mechanism can accurately adjust the extension and contraction degree of the telescopic screw pair, so that the balance adjustment can be completed by one extension and contraction, and compared with manual sand increase and decrease or balancing weights, the automatic balancing machine is more accurate and intelligent, and can avoid manual current measurement and balance adjustment for multiple times.
Further, the balance monitoring and automatic adjusting device of the tower type pumping unit adjusts the balance state of the tower type pumping unit in the range of one balancing weight, when the belt is in the vertical state, namely before the balancing weight is not adjusted, the balance rate at the moment is set to be in the balance rate threshold value interval, in the monitoring process, if the balance rate of the belt in the vertical state is smaller than the minimum balance rate threshold value, the action command module sends out an action command stretching out of the telescopic spiral pair, so that the telescopic spiral pair supports the belt driving the balancing weight to adjust the balance, and because the balance monitoring and automatic adjusting device of the tower type pumping unit adjusts the balance state of the tower type pumping unit in the range of one balancing weight, the adjusted balancing weight range is smaller, the over-balance state cannot occur when the belt is in the vertical state, the error existing in the adjustment is smaller, the adjustment is ensured to be adjusted accurately through repeated current measurement and repeated adjustment of the balancing weight, the remote automatic adjustment can be realized, the dependence on workers is reduced, the influence of weather roads is avoided, and the device is convenient to apply and has strong practicability.
Further, two ways of determining the displacement of the telescopic screw pair are provided, when the balance rate is too low or too high, the first displacement determining way is selected, the corresponding preset displacement is selected as the displacement of the telescopic screw pair according to the ratio of the balance rate is too low or too high, and the preset displacement is used as the displacement of the telescopic screw pair, the first displacement determining way is suitable for the situation that the balance rate deviates from a balance rate threshold interval to be larger, the telescopic screw pair can be moved to a position for enabling the tower type pumping unit to be in a balanced state through one-time adjustment by the preset three displacement amounts, even if the balance of the tower type pumping unit cannot be achieved through one-time adjustment, the balance rate of the tower type pumping unit at the moment does not deviate from the balance rate threshold interval too far, and then the balance of the tower type pumping unit is achieved through continuous monitoring and continuous adjustment.
Further, two ways of determining the displacement of the telescopic screw pair are arranged, when the balance rate is too low or too high, the displacement of the telescopic screw pair is calculated by selecting a second displacement determining way, and the displacement of the telescopic screw pair is determined by selecting a corresponding adjusting coefficient according to the value level of the balance rate is too low or too high, the second displacement determining way is suitable for the situation that the balance rate deviates from a balance rate threshold value interval to be smaller, three displacement adjusting coefficients are arranged, when the balance rate is too low or too high, the corresponding displacement adjusting coefficient is selected to calculate the displacement of the telescopic screw pair, and when the tower type pumping unit is in an under balanced or over balanced state, the displacement of the telescopic screw pair can be finely adjusted by a small amplitude through the adjusting coefficient, so that the accuracy of balance adjustment is improved.
Further, through setting up early warning module, when balanced monitoring of pylon beam-pumping unit and automatic regulating apparatus are in limit state, the belt is in vertical state or the telescopic screw pair stretches out the biggest displacement volume, still can't realize the balanced regulation of pylon beam-pumping unit, and at this moment, early warning module sends alarm information and notifies the staff, and the staff overhauls the counter weight of pylon beam-pumping unit, resets balanced state.
Drawings
FIG. 1 is a schematic diagram of a signal mechanism of a balance monitoring and automatic adjusting device of a tower type pumping unit according to an embodiment of the utility model;
FIG. 2 is a schematic structural diagram of an actuator of a balance monitoring and automatic adjusting device for a tower type pumping unit according to an embodiment of the present utility model;
FIG. 3 is an enlarged view of a portion of a telescoping screw pair according to an embodiment of the present utility model;
FIG. 4 is a signal control flow chart of an embodiment of the present utility model;
in the figure: the device comprises an action command module 1, a balance rate analysis module 2, a current monitoring module 3, an output action line 4, a current input wire 5, a low-speed motor 6, a belt 7, a telescopic control assembly 8, a low-speed gear telescopic structure 9 and a telescopic screw pair 10.
Detailed Description
In order that the objects and advantages of the utility model will become more apparent, the utility model will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 4, the balance monitoring and automatic adjusting device for a tower type pumping unit according to the present utility model includes:
the signal mechanism is arranged at one side of the power distribution box of the tower-type pumping unit, and the actuating mechanism is arranged on the platform of the tower-type pumping unit;
the signal mechanism comprises a current monitoring module 3 which is connected with a power distribution box of the tower type pumping unit through a current input wire 5 and used for detecting the maximum current of the up-down stroke of the tower type pumping unit, a balance rate analysis module 2 which is connected with the current monitoring module 3 and used for calculating the balance rate according to the maximum current of the up-down stroke and judging the balance condition, and an action command module 1 which is connected with the balance rate analysis module 2 and used for sending a corresponding action command according to the analysis result of the balance rate analysis module 2;
the actuating mechanism comprises a low-speed motor 6 which is connected with the action command module 1 through an output action line 4 and used for providing corresponding power according to the action command, and a telescopic control assembly 8 which is connected with the low-speed motor 6 and used for executing the action command; the telescopic control assembly 8 comprises a low-speed gear telescopic structure 9 and a telescopic screw pair 10, and the telescopic screw pair 10 is controlled to extend or retract by the low-speed gear telescopic structure 9 according to the action instruction, so that the telescopic screw pair 10 is contacted with the belt 7 driving the balancing weight to adjust balance;
the action command module 1 calculates a difference value between the balance rate and a corresponding balance rate threshold value when the balance rate exceeds a balance rate threshold value interval to select a determination mode for the displacement amount of the telescopic screw pair 10, selects a corresponding preset displacement amount according to a ratio of the difference value to a standard difference value as the displacement amount of the telescopic screw pair 10 in a first displacement determination mode, or selects a corresponding adjustment coefficient according to a value level of the difference value to determine the displacement amount of the telescopic screw pair 10 in a second displacement determination mode.
The balance monitoring and automatic regulating device of the tower type pumping unit uses the signal mechanism to replace staff to measure current and calculate balance rate, uses the actuating mechanism to replace staff to increase and decrease balance sand or balancing weight to regulate balance on site, realizes real-time and remote monitoring of the balance condition of the tower type pumping unit, overcomes the defects of personnel deficiency, bad weather, road influence and other factors such as current monitoring during staff logging in and untimely balance regulation, and reduces power consumption loss; meanwhile, the actuating mechanism can accurately adjust the extension and contraction degree of the telescopic screw pair 10, so that the balance adjustment can be completed by one extension and contraction, and compared with manual sand increase and decrease or balancing weights, the automatic balancing machine is more accurate and intelligent, and can avoid manual current measurement and balance adjustment for multiple times.
Specifically, the balance rate analysis module 2 is provided with a balance rate threshold interval [ B1, B2], wherein B1 is a balance rate minimum threshold, B2 is a balance rate maximum threshold, if the balance rate is smaller than the balance rate minimum threshold B1, the balance rate analysis module 2 determines that the tower-type pumping unit is in an unbalanced state, and if the balance rate is greater than the balance rate maximum threshold B2, the balance rate analysis module 2 determines that the tower-type pumping unit is in an over-balanced state.
In the embodiment of the present utility model, the balance rate threshold interval is set to be [85%,100% ], the balance rate analysis module 2 calculates the balance rate B by the following formula, and sets b=i lower/I upper×100%, wherein I lower is the maximum current of the downstroke detected by the current monitoring module 3, and I upper is the maximum current of the upstroke detected by the current monitoring module 3.
Specifically, the action command module 1 issues an action command to extend out of the expansion screw pair 10 in an unbalanced state, and issues an action command to retract the expansion screw pair 10 in an unbalanced state.
Specifically, the balance ratio analysis module 2 sets the initial balance ratio B0 corresponding to the belt 7 in the vertical state within the balance ratio threshold interval [ B1, B2 ].
Specifically, the current monitoring module 3 detects the maximum current of the up-and-down stroke of the tower-type pumping unit in a vertical state of the belt 7 to calculate the balance rate in real time, if the balance rate calculated by the balance rate analysis module 2 is smaller than the minimum balance rate threshold B1, the tower-type pumping unit is judged to be in an unbalanced state, and the action command module 1 sends an action command extending out of the telescopic screw pair 10 to enable the telescopic screw pair 10 to support the belt 7 driving the balancing weight to adjust balance; and if the balance rate calculated by the balance rate analysis module 2 is greater than or equal to the lowest balance rate threshold B1, the current monitoring module 3 continues to detect the maximum current of the up and down strokes of the tower type pumping unit.
Specifically, the current monitoring module 3 detects maximum current of up-down stroke of the tower pumping unit in a state that the belt 7 is supported to calculate a balance rate in real time, wherein,
if the balance rate calculated by the balance rate analysis module 2 is smaller than a minimum balance rate threshold B1, determining that the tower type pumping unit is in an unbalanced state, and sending an action instruction extending out of the telescopic screw pair 10 by the action instruction module 1;
if the balance rate calculated by the balance rate analysis module 2 is greater than a balance rate highest threshold B2, judging that the tower type pumping unit is in an overbalanced state, and sending an action instruction for shrinking the telescopic screw pair 10 by the action instruction module 1;
if the balance rate calculated by the balance rate analysis module 2 is within a balance rate threshold value interval [ B1, B2], the current monitoring module 3 continues to detect the maximum current of the up-down stroke of the tower-type pumping unit;
the supporting state is that the telescopic screw pair 10 supports the belt 7.
As a preferred embodiment, a belt fixing device may be disposed on the telescopic screw pair 10, the belt fixing device has an i-shaped structure and is adapted to the width of the belt 7, the belt 7 is just placed in the belt fixing device when the telescopic screw pair 10 contacts with the belt 7, and the belt 7 is positioned when the telescopic screw pair 10 moves in a telescopic manner, so as to prevent the belt 7 from being deviated.
According to the balance monitoring and automatic adjusting device of the tower-type pumping unit, the balance state of the tower-type pumping unit is adjusted within the range of one balancing weight, when the belt is in the vertical state, namely before the balancing weight is not adjusted, the balance rate at the moment is set within the balance rate threshold value intervals [ B1 and B2], in the monitoring process, if the balance rate of the belt in the vertical state is smaller than the balance rate minimum threshold value B1, the action command module 1 sends an action command extending out of the telescopic screw pair 10, so that the telescopic screw pair 10 supports the belt 7 driving the balancing weight to adjust the balance, and as the balance monitoring and automatic adjusting device of the tower-type pumping unit adjusts the balance state of the tower-type pumping unit within the range of one balancing weight, the adjusted balancing weight range is smaller, the over-balance state cannot occur when the belt is in the vertical state, the balance exists adjusting error is smaller, the balancing weight is adjusted repeatedly, the accuracy of the balance adjustment can be guaranteed through measuring current and adjusting the balancing weight repeatedly, the dependency on workers is reduced, the weather influence is avoided, and the device is convenient to apply, and the practicability is strong.
Specifically, the action command module 1 calculates the displacement amount by which the expansion screw pair 10 extends according to the balance rate too low difference between the balance rate and the balance rate minimum threshold in the unbalanced state, and calculates the displacement amount by which the expansion screw pair 10 contracts according to the balance rate too high difference between the balance rate and the balance rate maximum threshold in the unbalanced state.
Specifically, the action command module 1 calculates a balance rate too low difference Δbd between the balance rate B and a balance rate minimum threshold B1 in an underbalanced state, and sets Δbd=b1-B, and the action command module 1 calculates the amount of displacement of the expansion screw pair 10 according to the balance rate too low difference Δbd;
the action command module 1 calculates an excessive balance difference Δbg between the balance rate B and a maximum balance rate threshold B2 in an over-balance state, and sets Δbg=b-B2, and the action command module 1 calculates a displacement amount of the expansion screw pair 10 according to the excessive balance difference Δbg.
Specifically, the action command module 1 compares a difference Δbi with a preset standard difference Δbb, and selects a determination mode for the displacement of the telescopic screw pair 10 according to the comparison result, where the difference Δbi is a difference Δbd with too low balance rate or a difference Δbg with too high balance rate;
if Δbi is greater than or equal to Δbb, the motion command module 1 determines that the displacement of the expansion screw pair 10 is determined by adopting a first displacement determination mode;
if Δbi < Δbb, the operation command module 1 determines that the displacement amount of the expansion screw pair 10 is determined by the second displacement determination method.
Specifically, a first displacement amount S1, a second displacement amount S2, and a third displacement amount S3 are preset in the motion command module 1, S1 < S2 < S3, and in the first displacement determination mode, the motion command module 1 selects a corresponding preset displacement amount as the displacement amount of the telescopic screw pair 10 according to the ratio of the difference Δbi to Δbb
Specifically, the action command module 1 calculates a ratio a of Δbi to Δbb, and sets a=Δbi/Δbb, where,
if A1 is less than or equal to A < A2, the action command module 1 determines the displacement of the telescopic screw pair 10 as a first displacement S1;
if A2 is less than or equal to A < A3, the action command module 1 determines the displacement of the telescopic screw pair 10 as a second displacement S2;
if A is more than or equal to A3, the action command module 1 determines the displacement of the telescopic screw pair 10 as a third displacement S3;
wherein A1 is a first preset ratio, A2 is a second preset ratio, A3 is a third preset ratio, A1 is more than or equal to 1 and less than A2 is less than A3 and less than 4, and a1=1, a2=2 and a3=3 are preferred in the embodiment.
The first displacement S1, the second displacement S2, the third displacement S3, and the adjustment displacement h0 may be set according to the actual condition of the counterweight of the tower type pumping unit and the maximum length of the telescopic screw pair 10 that can be extended.
Specifically, in the second displacement determining manner, the action command module 1 selects a corresponding adjustment coefficient according to the value level of the difference Δbi to determine the displacement of the telescopic screw pair 10.
Specifically, a first preset difference value Δb1 and a second preset difference value Δb2 are set in the motion command module 1, Δb1 is less than Δb2 and less than Δbb, the motion command module 1 compares the difference value Δbi with the first preset difference value Δb1 and the second preset difference value Δb2, and calculates the displacement of the expansion screw pair 10 according to the comparison result, where the difference value Δbi is a difference value Δbd with too low balance rate or a difference value Δbg with too high balance rate,
if Δbi < Δb1, the difference Δbi is at a first value level, the motion command module 1 determines the displacement of the expansion screw pair 10 as h1, and sets h1=h0×f1, f1 as a first displacement adjustment coefficient, and h0 as a preset adjustment displacement;
if Δb1 is less than or equal to Δbi and less than Δb2, the difference Δbi is at a second value level, the motion command module 1 determines the displacement of the telescopic screw pair 10 as h2, and sets h2=h0×f2, and f2 is a second displacement adjustment coefficient;
if Δbi is greater than or equal to Δb2, the difference Δbi is at a third value level, the motion command module 1 determines the displacement of the expansion screw pair 10 as h3, and sets h3=h0×f3, and f3 is a third displacement adjustment coefficient;
in this embodiment, 0.1 < f1 < f2 < f3 < 0.3, preferably f1=0.15, f2=0.2, and f3=0.25 are set.
According to the utility model, two modes for determining the displacement amount of the telescopic screw pair 10 are provided, when the balance rate is too low by a difference value delta Bd or the balance rate is too high by a difference value delta Bg which is larger than or equal to a standard difference value delta Bb, a first displacement determination mode is selected, a corresponding preset displacement amount is selected according to the ratio of delta Bi to delta Bb as the displacement amount of the telescopic screw pair 10, the first displacement determination mode is suitable for the situation that the balance rate deviates from a balance rate threshold value interval [ B1, B2] to be larger, the telescopic screw pair 10 can be moved to a position which enables the tower type pumping unit to be in a balance state through one-time adjustment by presetting three displacement amounts, even if the balance of the tower type pumping unit cannot be realized through one-time adjustment, the balance rate of the tower type pumping unit cannot deviate from the balance rate threshold value interval [ B1, B2] too far, and then the balance of the tower type pumping unit is continuously adjusted through continuous monitoring, so that the adjustment efficiency of the device is improved through the technical scheme.
When the balance rate is lower than the standard difference value delta Bd or higher than the balance rate delta Bg, a second displacement determining mode is selected, a corresponding adjusting coefficient is selected according to the value level of the difference value delta Bi to determine the displacement of the telescopic screw pair 10, the second displacement determining mode is suitable for the condition that the balance rate deviates from a balance rate threshold value interval [ B1, B2] to be smaller, three displacement adjusting coefficients are arranged, when the difference value delta Bi is in different difference value ranges, the corresponding displacement adjusting coefficient is selected to calculate the displacement of the telescopic screw pair 10, and when the tower type pumping unit is in an underbalanced or overbalanced state, the small-amplitude fine adjustment can be carried out on the displacement of the telescopic screw pair 10 through the adjusting coefficient, so that the accuracy of balance adjustment is improved.
Specifically, the operation command module 1 compares the calculated displacement amount of the telescopic screw pair 10 from shrinking with the maximum distance of the belt 7 from the vertical state in the supporting state, and if the calculated displacement amount of the telescopic screw pair 10 from shrinking is equal to or greater than the maximum distance of the belt 7 from the vertical state, the operation command module 1 sets the displacement amount of the telescopic screw pair 10 from shrinking to the maximum distance of the belt 7 from the vertical state, so that the belt 7 is restored to the vertical state.
Specifically, the balance monitoring and automatic adjusting device of the tower type pumping unit in the embodiment of the utility model further comprises an early warning module (not shown in the figure), wherein the early warning module is connected with the balance rate analysis module 2, and the early warning module sends out alarm information if the belt 7 is in a vertical state or the balance rate corresponding to the maximum extension length of the telescopic screw pair 10 exceeds a balance rate threshold interval [ B1, B2 ].
Through setting up early warning module, when balanced monitoring of pylon beam-pumping unit and automatic regulating apparatus are in limit state, belt 7 is in vertical state or telescopic screw pair 10 stretches out maximum length promptly, still can't realize the balanced regulation of pylon beam-pumping unit, and at this moment, early warning module sends alarm information and notifies the staff, and the staff overhauls the counter weight of pylon beam-pumping unit, resets balanced state.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will be within the scope of the present utility model.
The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the utility model; various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. A balance monitoring and automatic adjusting device for a tower type pumping unit, comprising:
the signal mechanism is arranged at one side of the power distribution box of the tower-type pumping unit, and the actuating mechanism is arranged on the platform of the tower-type pumping unit;
the signal mechanism comprises a current monitoring module which is connected with the power distribution box of the tower type pumping unit through a current input wire and used for detecting the maximum current of the up-down stroke of the tower type pumping unit, a balance rate analysis module which is connected with the current monitoring module and used for calculating the balance rate according to the maximum current of the up-down stroke and judging the balance condition, and an action command module which is connected with the balance rate analysis module and used for sending a corresponding action command according to the analysis result of the balance rate analysis module;
the actuating mechanism comprises a low-speed motor which is connected with the action command module through an output action line and used for providing corresponding power according to the action command, and a telescopic control assembly which is connected with the low-speed motor and used for executing the action command; the telescopic control assembly comprises a low-speed gear telescopic structure and a telescopic screw pair, and the telescopic screw pair is controlled to extend or retract by the low-speed gear telescopic structure according to the action instruction, so that the telescopic screw pair is contacted with a belt for driving the balancing weight to adjust balance;
the action command module calculates the difference value between the balance rate and the corresponding balance rate threshold value under the condition that the balance rate exceeds the balance rate threshold value interval so as to select a determination mode of the displacement amount of the telescopic screw pair, selects a corresponding preset displacement amount according to the ratio of the difference value to the standard difference value as the displacement amount of the telescopic screw pair in a first displacement determination mode, or selects a corresponding adjustment coefficient according to the value level of the difference value in a second displacement determination mode so as to determine the displacement amount of the telescopic screw pair;
the action command module calculates the extending displacement of the telescopic screw pair according to the balance rate too low difference value delta Bd of the balance rate and the balance rate lowest threshold value in an under-balanced state, and calculates the contracting displacement of the telescopic screw pair according to the balance rate too high difference value delta Bg of the balance rate and the balance rate highest threshold value in an over-balanced state;
the action command module compares the difference value delta Bi with a preset standard difference value delta Bb, and selects a determination mode of the displacement of the telescopic screw pair according to the comparison result, wherein the difference value delta Bi is a difference value delta Bd with too low balance rate or a difference value delta Bg with too high balance rate;
if ΔBi is more than or equal to ΔBb, the action command module judges that the displacement of the telescopic screw pair is determined by adopting a first displacement determination mode;
and if delta Bi is less than delta Bb, the action command module judges that the displacement of the telescopic screw pair is determined by adopting a second displacement determination mode.
2. The balance monitoring and automatic adjusting device of the tower type pumping unit according to claim 1, wherein a balance rate threshold interval is arranged in the balance rate analysis module, the balance rate threshold interval comprises a balance rate minimum threshold and a balance rate maximum threshold, if the balance rate is smaller than the balance rate minimum threshold, the balance rate analysis module judges that the tower type pumping unit is in an unbalanced state, and if the balance rate is larger than the balance rate maximum threshold, the balance rate analysis module judges that the tower type pumping unit is in an over-balanced state.
3. The balance monitoring and automatic adjustment device of a tower type pumping unit according to claim 2, wherein the balance rate analysis module sets an initial balance rate corresponding to the belt in a vertical state within a balance rate threshold interval.
4. The balance monitoring and automatic adjusting device of the tower type pumping unit according to claim 3, wherein the current monitoring module detects the maximum current of the up-down stroke of the tower type pumping unit in real time under the condition that the belt is in a vertical state, if the balance rate calculated by the balance rate analysis module is smaller than the minimum threshold value of the balance rate, the tower type pumping unit is judged to be in an unbalanced state, and the action command module sends an action command extending out of the telescopic screw pair, so that the telescopic screw pair supports the belt driving the balancing weight to adjust the balance; and if the balance rate calculated by the balance rate analysis module is greater than or equal to the lowest balance rate threshold, the current monitoring module continues to detect the maximum current of the up-down stroke of the tower-type pumping unit.
5. The balance monitoring and automatic adjusting device for a tower type pumping unit according to claim 4, wherein the current monitoring module detects maximum current of up and down strokes of the tower type pumping unit in a supporting state of the belt to calculate a balance rate in real time, wherein,
if the balance rate calculated by the balance rate analysis module is smaller than the lowest balance rate threshold, judging that the tower type pumping unit is in an unbalanced state, and sending an action instruction extending out of the telescopic spiral pair by the action instruction module;
if the balance rate calculated by the balance rate analysis module is greater than the highest balance rate threshold, judging that the tower type oil pumping unit is in an overbalanced state, and sending an action instruction for shrinking the telescopic spiral pair by the action instruction module;
the supporting state is that the telescopic spiral pair supports the belt.
6. The balance monitoring and automatic adjusting device for a tower type pumping unit according to claim 5, wherein the displacement of the telescopic screw pair calculated by the action command module in the supporting state is greater than or equal to the maximum distance of the belt from the vertical state, so that the belt is restored to the vertical state.
7. The balance monitoring and automatic adjusting device of the tower type pumping unit according to claim 1, further comprising an early warning module, wherein the early warning module is connected with the balance rate analysis module, and the early warning module sends out warning information if the belt is in a vertical state or the balance rate corresponding to the maximum extension length of the telescopic screw pair exceeds a balance rate threshold interval.
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| CN117027738A (en) | 2023-11-10 |
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