Automatic monitoring device and system for pumping unit packing piercing leakage and polish rod dry grinding

Abstract

The invention relates to the field of pumping unit packing monitoring, in particular to a pumping unit packing piercing leakage and polish rod dry grinding automatic monitoring device and system.The pumping unit packing piercing leakage and polish rod dry grinding automatic monitoring device comprises a packing box pressing cap and a pumping unit polish rod arranged at the top of the packing box pressing cap, the bottom end of the pumping unit polish rod penetrates through the packing box pressing cap, and monitoring equipment is arranged at the top of the packing box pressing cap; the monitoring device comprises an anti-explosion control box, a positioning structure is arranged on one side of the anti-explosion control box and used for fixing the anti-explosion control box to the top position of a packing box pressing cap, and a testing structure is arranged on one side of the positioning structure. According to the anti-explosion control box, through opening and closing of the two positioning pieces and cooperation of the hasp and the hinge, the positioning pieces can be rapidly and conveniently installed on the packing box pressing cap, compared with a common monitoring method, the anti-explosion control box is more convenient to disassemble and assemble, water and dust can be prevented from entering the two positioning pieces through nitrile rubber, and the anti-explosion control box is more convenient to disassemble and assemble. And the service life of the polish rod of the oil pumping unit is influenced.

Description

Technical Field

[0001] The invention relates to the field of packing monitoring for oil pumping units, in particular to an automatic monitoring device and system for packing leakage and polished rod dry grinding of oil pumping units. Background Art

[0002] During the oilfield production process, the monitoring of packing leakage and polished rod dry grinding is done by pumpers patrolling the wells, but manual inspection has the problem of delayed detection. In order to solve the above problems, a temperature sensor and an oil-water sensor are generally installed at the packing box cap position, and the information from these two sensors is used to analyze whether packing leakage and polished rod dry grinding occur.

[0003] The above-mentioned solution adopts bolts and other fixing methods for disassembly and assembly, which is troublesome to operate, and the temperature sensor, oil-water sensor and information processing equipment need to be powered on all the time, which requires laying a large number of wires or frequently changing the power supply manually, which will waste a lot of manpower and material resources. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic monitoring device and system for oil pump packing leakage and polished rod dry grinding, which solves the technical problem in the prior art that the temperature sensor, oil-water sensor and information processing equipment cannot be controlled in terms of power.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for automatically monitoring packing leakage and dry grinding of a pumping unit comprises a packing box cap and a pumping unit polished rod arranged on the top of the packing box cap, the bottom end of the pumping unit polished rod passes through the packing box cap, a monitoring device is arranged at the top of the packing box cap, the monitoring device comprises an explosion-proof control box, a positioning structure is arranged on one side of the explosion-proof control box, the positioning structure is used to fix the explosion-proof control box at the top of the packing box cap, a test structure is arranged on one side of the positioning structure, the test structure is used to monitor working information, the explosion-proof control box is used to issue an early warning according to the working information, the working information comprises the ambient temperature, the surface temperature of the pumping unit polished rod and whether there is water or crude oil in the positioning structure.

[0007] Furthermore, the positioning structure includes two positioning members, and the two positioning members form a circular positioning ring, and the positioning ring is sleeved on the outer wall of the packing box pressure cap. A hinge is provided on one side of the positioning ring, and the hinge is used to connect the two positioning members and enable the two positioning members to rotate relative to each other. A buckle is provided on the other side of the positioning ring, and the buckle is used to limit the relative rotation of the two positioning members.

[0008] Furthermore, a device box cover is fixedly connected to the top of the positioning member, a nitrile rubber is fixedly connected to the inner wall of the device box cover, and the inner side of the nitrile rubber is fitted with the side wall of the oil pumping unit's bare rod.

[0009] Furthermore, the test structure includes a low-power oil-water detection sensor, which includes a stainless steel sensor body. The stainless steel sensor body passes through the side wall of one of the positioning pieces and is fixedly connected to the positioning piece. One end of the stainless steel sensor body is fixedly connected to a transparent tempered glass, and a monitoring circuit board is provided on the inner side of the transparent tempered glass. The other end of the stainless steel sensor body is fixedly connected to a first waterproof cable protection joint, and a first crude oil resistant cable is plugged into the inner wall of the first waterproof cable protection joint.

[0010] Furthermore, the test structure also includes a low-power infrared temperature sensor, which includes a second waterproof cable protection joint, wherein a fixing plate is fixedly connected to the top of one of the positioning members, the second waterproof cable protection joint penetrates the fixing plate and is fixedly connected to the fixing plate, one end of the second waterproof cable protection joint is fixedly connected to a sensor body, an end of the sensor body away from the second waterproof cable protection joint is fixedly connected to a pressure cap, an infrared temperature probe is provided on the inner side of the pressure cap, a circuit board is provided at the end of the infrared temperature probe away from the pressure cap, a second crude oil resistant cable is provided at the end of the circuit board away from the infrared temperature probe, and the second crude oil resistant cable and the second waterproof cable protection joint are plugged into each other.

[0011] An automatic monitoring system for oil pumping unit packing leakage and polished rod dry grinding, comprising:

[0012] The information collection module is used to obtain work information;

[0013] The information processing module is used to control the power supply output according to the working information, and to judge the status of the packing and the polished rod of the pumping unit according to the working information;

[0014] The Lora module is used to transmit the status of packing and pumping unit polished rod.

[0015] Furthermore, the information collection module includes:

[0016] The temperature monitoring unit is used to monitor the ambient temperature and the surface temperature of the polished rod of the oil pump;

[0017] The oil-water monitoring unit is used to monitor the liquid in the packing;

[0018] The battery power acquisition unit is used to obtain the external battery power information.

[0019] Furthermore, the information processing module includes:

[0020] The power management unit is used to control the power supply module. The power management unit has two modes: low power consumption and normal power consumption. The low power consumption mode only supplies power to the oil-water monitoring unit and the RTC unit. The normal power consumption mode is used to supply power to the low power infrared temperature sensor, the battery power processing unit and the Lora module.

[0021] The RTC unit is used to periodically wake up the normal power consumption mode of the power management unit;

[0022] The processing circuit is used to perform pre-processing on the information obtained by the low-power oil-water detection sensor to generate a wake-up signal for waking up the normal power consumption mode of the power supply management unit;

[0023] The battery power processing unit is used to analyze the external battery power information.

[0024] Further, the processing circuit includes a microcontroller U1, a voltage switch control chip U2, a capacitor C1, a resistor R1, a resistor R2 and a resistor R3;

[0025] Among them, the signal Leakin obtained by the low-power oil-water detection sensor is input into the processing circuit in two ways. One way enters the WakeUp port of the microcontroller U1 through the capacitor C1 to wake up the normal power consumption mode of the power management unit; the other way enters the IO port of the microcontroller U1 as an oil-water monitoring alarm signal, and the resistor R1 is grounded to keep the microcontroller U1 enabled;

[0026] The PowerEn port of the microcontroller U1 outputs the signal received by the WakeUp port to the EN port of the voltage switch control chip U2, which is used to control the IN and OUT ports of the voltage switch control chip U2. The IN port of the voltage switch control chip U2 is used as an input end to connect the input of an external power supply. The OUT of the voltage switch control chip U2 is used as an output end to power the low-power infrared temperature sensor, the battery power processing unit and the Lora module. The resistor R2 is used as a pull-down resistor to keep the voltage switch control chip U2 enabled. The two ends of the resistor R3 are respectively connected to the ILIM port and the GND interface of the voltage switch control chip U2, which are used to set the maximum current of the IN and OUT ports of the voltage switch control chip U2, and the resistors R2 and R3 are grounded.

[0027] Furthermore, the battery power processing unit includes an analog-to-digital converter for converting external battery power information into a digital signal; and a DMA bus is used to directly read the digital signal.

[0028] Compared with the prior art, the present invention provides an automatic monitoring device and system for packing leakage and polished rod dry grinding of an oil pumping unit, which has the following beneficial effects:

[0029] 1. The present invention can make the whole system run in low-power consumption mode during daily work, and only obtain the information of low-power oil-water detection sensor to ensure that the staff is notified at the first time when the packing leakage occurs, and periodically wake up the whole system to obtain the information of external battery power and low-power infrared temperature sensor to ensure that when the bare rod is dry-ground, the staff is notified as soon as possible for maintenance. Compared with the common automatic monitoring system, the standby time of the whole system is longer, and there is no need to set up a large number of wires and frequently change the power supply, which can effectively save human resources and ensure the real-time nature of triggering the alarm when the pumping unit packing leakage or bare rod dry-ground occurs.

[0030] 2. The present invention can quickly and conveniently install the positioning parts on the packing box pressure cap by opening and closing the two positioning parts and cooperating with the buckle and the hinge. Compared with the common monitoring method, the operation of disassembling and assembling the explosion-proof control box is more convenient, and the nitrile rubber can prevent water and dust from entering the two positioning parts, which will affect the service life of the oil pump rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 It is a structural schematic diagram of an automatic monitoring device for packing leakage and polished rod dry grinding of an oil pumping unit according to the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the monitoring device of the present invention;

[0034] Figure 3 It is a structural schematic diagram of the low power consumption oil-water detection sensor of the present invention;

[0035] Figure 4 It is a structural schematic diagram of the low-power infrared temperature measurement sensor of the present invention;

[0036] Figure 5 It is a module diagram of an automatic system for oil pumping unit packing leakage and polished rod dry grinding according to the present invention;

[0037] Figure 6 is a circuit diagram of a processing circuit of the present invention;

[0038] Figure 7 The present invention is a flow chart of a monitoring method of an automatic monitoring system for oil pumping unit packing leakage and polished rod dry grinding.

[0039] 1. Packing box pressure cap; 2. Monitoring equipment; 3. Pumping unit bare rod; 4. Small knurled set screw; 5. Drain screw; 6. Positioning piece; 7. Hinge; 8. Device box cover; 9. Low-power infrared temperature sensor; 10. Explosion-proof antenna; 11. Explosion-proof control box; 12. Explosion-proof control box cover; 13. Waterproof cable connector; 14. Low-power oil and water detection sensor; 15. Buckle;

[0040] 16. The first crude oil resistant cable; 17. The first waterproof cable protection connector; 18. Stainless steel sensor body; 19. Monitoring circuit board; 20. Transparent tempered glass;

[0041] 21. Second crude oil resistant cable; 22. Second waterproof cable protection connector; 23. Sensor body; 24. Circuit board; 25. Infrared temperature probe; 26. Pressure cap. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0043] In the field of oil exploration technology, after drilling is completed, a pumping unit is used to extract crude oil. The bare rod of the pumping unit drives the sucker rod to reciprocate up and down in the oil pipe. The oil pump installed at the end of the oil pipe can suck the crude oil at the bottom of the well to the surface and enter the oil pipeline. The sucked crude oil usually has a certain pressure. Usually, packing is used as a sealing material and added to the packing box to seal the bare rod, so that the crude oil can enter the subsequent oil pipeline process.

[0044] In actual use, due to the long-term reciprocating wear of the polished rod, the packing seal will gradually fail, resulting in the spraying of crude oil or oil-water mixture from the packing box and packing leakage. After the packing is punctured, the leaked crude oil flows to the ground and causes environmental pollution, which must be discovered in time and shut down for maintenance.

[0045] At the same time, if the packing box is pressed too tight, resulting in a small dynamic seal gap; or the bottom hole pump fails; the sucker rod breaks; the oil pipe is worn or corroded, it will cause the bare rod to dry. Similarly, if the bare rod dry grinding occurs, it also means that there is a problem with the production of the pumping unit, and it needs to be shut down and repaired as soon as possible.

[0046] At present, the monitoring of packing leakage and polished rod dry grinding in the oil field production process is done by pumpers patrolling the wells and manually inspecting, which has the problem of delayed detection. Figure 1As shown, the present invention proposes an automatic monitoring device for packing leakage and polished rod dry grinding of an oil pumping unit, comprising a packing box pressure cap 1 and an oil pumping unit polished rod 3 arranged on the top of the packing box pressure cap 1, the bottom end of the oil pumping unit polished rod 3 passes through the packing box pressure cap 1, and a monitoring device 2 is provided at the top position of the packing box pressure cap 1; specifically, packing is arranged in the packing box pressure cap 1, the outer surface of the oil pumping unit polished rod 3 is in contact with the inner surface of the packing, the monitoring device 2 is used for real-time monitoring of whether packing leakage and polished rod dry grinding occur, and the moving trajectory of the oil pumping unit polished rod 3 can be limited to a certain extent, thereby improving the service life of the oil pumping unit polished rod 3.

[0047] The monitoring device 2 includes an explosion-proof control box 11, such as Figure 2 As shown, a positioning structure is provided on one side of the explosion-proof control box 11, and the positioning structure is used to fix the explosion-proof control box 11 at the top position of the packing box pressure cap 1; specifically, in order to be able to monitor in real time whether the packing leakage and dry grinding of the bare rod occur, it is necessary to set a sensor and a control device at the connection position of the pumping unit bare rod 3 and the packing box pressure cap 1. Therefore, the positioning structure includes two positioning members 6, and the two positioning members 6 form a circular ring-shaped positioning ring, which is sleeved on the outer wall of the packing box pressure cap 1. A hinge 7 is provided on one side of the positioning ring, and the hinge 7 is used to connect the two positioning members 6 and enable the two positioning members 6 to rotate relative to each other. A buckle 15 is provided on the other side of the positioning ring, and the buckle 15 is used to limit the relative rotation of the two positioning members 6; specifically, one end of the two positioning members 6 is connected by the hinge 7, and the buckle 15 is used to fix the two positioning members 6 at one end away from the hinge 7, so that the positioning ring can be quickly and conveniently installed at the top position of the packing box pressure cap 1.

[0048] An explosion-proof control box cover 12 is fixedly connected to one end of the explosion-proof control box 11, and the explosion-proof control box cover 12 is used to protect the components inside the explosion-proof control box 11. A waterproof cable connector 13 is provided on one side of the explosion-proof control box 11, and the waterproof cable connector 13 is used to prevent dust from entering the explosion-proof control box 11.

[0049] The top of the positioning member 6 is fixedly connected with a device box cover 8, and the inner wall of the device box cover 8 is fixedly connected with a nitrile rubber, and the inner side of the nitrile rubber is in contact with the side wall of the oil pumping unit's bare rod 3; specifically, the surface of the nitrile rubber is set to be an inclined plane, and the closer to the oil pumping unit's bare rod 3, the higher the horizontal height is, which can prevent rainwater from entering the positioning ring, and the nitrile rubber is flexible and will not affect the movement of the oil pumping unit's bare rod 3.

[0050] The bottom thread of the positioning member 6 is connected with a plurality of small knurled locking screws 4, which are used to adjust the position of the positioning member 6; specifically, the small knurled locking screws 4 are used to increase the friction between the positioning member 6 and the packing box pressure cap 1 to prevent the positioning ring from falling off due to factors such as wellhead vibration or strong winds.

[0051] One side of one of the positioning members 6 is provided with an oil drain screw 5 , and when packing leakage occurs in the packing box pressure cap 1 , the oil drain screw 5 is used to drain the crude oil in the packing box pressure cap 1 .

[0052] A test structure is provided on one side of the positioning structure, and the test structure is used to monitor the working information; specifically, since it is necessary to monitor in real time whether the packing leakage and the polished rod dry grinding occur, the test structure includes a low-power oil-water detection sensor 14, such as Figure 3 As shown, the low-power oil-water detection sensor 14 includes a stainless steel sensor body 18, which passes through the side wall of one of the positioning members 6 and is fixedly connected to the positioning member 6. One end of the stainless steel sensor body 18 is fixedly connected to a transparent tempered glass 20, and a monitoring circuit board 19 is provided on the inner side of the transparent tempered glass 20. The other end of the stainless steel sensor body 18 is fixedly connected to a first waterproof cable protection connector 17, and the inner wall of the first waterproof cable protection connector 17 is plugged with a first crude oil resistant cable 16; specifically, when crude oil or water exists on the surface of the transparent tempered glass 20, the capacitance of the transparent tempered glass 20 will change, and the monitoring circuit board 19 will sense this capacitance change and transmit the signal to the explosion-proof control box 11 through the first crude oil resistant cable 16 to realize the monitoring of whether the packing is leaking. The first waterproof cable protection connector 17, the stainless steel sensor body 18 and the transparent tempered glass 20 all play a role in protecting the first crude oil resistant cable 16 and the monitoring circuit board 19 to extend their service life.

[0053] The test structure also includes a low-power infrared temperature sensor 9, such as Figure 4As shown, the low-power infrared temperature measurement sensor 9 includes a second waterproof cable protection joint 22, wherein the top of one of the positioning members 6 is fixedly connected to a fixing plate, the second waterproof cable protection joint 22 penetrates the fixing plate and is fixedly connected to the fixing plate, one end of the second waterproof cable protection joint 22 is fixedly connected to a sensor body 23, one end of the sensor body 23 away from the second waterproof cable protection joint 22 is fixedly connected to a pressure cap 26, an infrared temperature probe 25 is arranged on the inner side of the pressure cap 26, an end of the infrared temperature probe 25 away from the pressure cap 26 is provided with a circuit board 24, an end of the circuit board 24 away from the infrared temperature probe 25 is provided with a second crude oil resistant cable 21, the second crude oil resistant cable 21 and the second waterproof cable protection joint 2 2 plug-in fit; specifically, since all objects will emit infrared rays of different wavelengths according to their temperature, the infrared temperature probe 25 can capture this information, and the circuit board 24 converts the infrared energy into a corresponding electrical signal, and finally transmits it to the explosion-proof control box 11 through the second crude oil resistant cable 21, so as to complete the monitoring of the surface temperature of the oil pumping unit's polished rod 3 and the ambient temperature. When the surface temperature of the oil pumping unit's polished rod 3 exceeds the set threshold, it indicates that the polished rod is dry-ground. In addition, the second waterproof cable protection joint 22 and the sensor body 23 are used to ensure sealing to prevent water or liquids such as crude oil from contacting the circuit board 24 and the infrared temperature probe 25, and the pressure cap 26 is used to determine the position of the infrared temperature probe 25.

[0054] An explosion-proof antenna 10 is fixedly connected to the top of the explosion-proof control box 11 , and the explosion-proof antenna 10 is used to receive and send signals.

[0055] The explosion-proof control box 11 is used to issue early warnings based on working information, including ambient temperature, surface temperature of the pumping unit's bare rod 3, and whether there is water or crude oil in the positioning structure; specifically, the explosion-proof control box 11 analyzes whether packing leakage and bare rod dry grinding occur based on information obtained by the low-power infrared temperature sensor 9 and the low-power oil-water detection sensor 14. If so, an alarm is issued to the staff to avoid environmental pollution and waste of resources caused by crude oil leakage.

[0056] In the present invention, by opening and closing the two positioning members 6 and by the cooperation of the buckle 15 and the hinge 7, the positioning member 6 can be quickly and conveniently installed on the packing box pressure cap 1. Compared with the common monitoring method, the operation of disassembling and assembling the explosion-proof control box 11 is more convenient, and the nitrile rubber can prevent water and dust from entering the two positioning members 6, which would affect the service life of the oil pump rod 3.

[0057] like Figure 5-6 As shown, the present invention also proposes an automatic monitoring system for oil pumping unit packing leakage and polished rod dry grinding, comprising:

[0058] The information collection module is used to obtain working information; specifically, in order to monitor in real time whether there is packing leakage and polished rod dry grinding, it is necessary to detect the ambient temperature, the surface temperature of the pumping unit polished rod 3 and whether there is water or crude oil in the packing. Therefore, the information collection module includes:

[0059] The temperature monitoring unit is used to monitor the ambient temperature and the surface temperature of the polished rod 3 of the oil pump; specifically, the temperature monitoring unit is constructed based on a low-power infrared temperature sensor 9;

[0060] The oil-water monitoring unit is used to monitor the liquid in the packing; specifically, the oil-water monitoring unit is constructed based on a low-power oil-water detection sensor 14;

[0061] The battery power acquisition unit is used to obtain the power information of the external battery; specifically, the power information of the external battery is a continuously changing voltage value, which can directly reflect the state of the external battery, directly correspond to the potential difference across the external battery, and can also be used as a basis for power management, so as to determine the duration of low power operation according to the battery voltage.

[0062] The power supply module is used to supply power to the information processing module, the information collection module and the Lora module; specifically, the power supply module is constructed based on an external battery and is used to supply power to the entire system.

[0063] The information processing module is used to control the power supply output according to the working information, and to judge the status of the packing and the polished rod 3 of the oil pump according to the working information; specifically, since the power of the external power supply in the system is limited, under normal working conditions, the power consumption of the entire system needs to be reduced as much as possible to increase the service life, and when the packing is leaking or the polished rod is dry-ground, it needs to be reported to the staff as quickly as possible, so the information processing module includes:

[0064] The power supply management unit is used to control the power supply module. The power supply management unit has two modes: low power consumption and normal power consumption. The low power consumption mode only supplies power to the oil-water monitoring unit and the RTC unit. The normal power consumption mode is used to supply power to the low power consumption infrared temperature sensor 9, the battery power processing unit and the Lora module.

[0065] The RTC unit is used to periodically wake up the normal power consumption mode of the power management unit;

[0066] The processing circuit is used to pre-process the information obtained by the low-power oil and water detection sensor 14 to generate a wake-up signal to wake up the normal power consumption mode of the power supply management unit; specifically, when crude oil or water appears in the packing, it indicates that the packing is leaking and the entire system needs to be directly woken up. Figure 6As shown, the processing circuit includes a microcontroller U1, a voltage switch control chip U2, a capacitor C1, a resistor R1, a resistor R2 and a resistor R3;

[0067] Among them, the signal Leakin obtained by the low-power oil-water detection sensor 14 is input into the processing circuit in two ways. One way enters the WakeUp port of the microcontroller U1 through the capacitor C1 to wake up the normal power consumption mode of the power management unit; the other way enters the IO port of the microcontroller U1 as an oil-water monitoring alarm signal, and the resistor R1 is grounded to keep the microcontroller U1 enabled;

[0068] The PowerEn port of the microcontroller U1 outputs the signal received by the WakeUp port to the EN port of the voltage switch control chip U2, which is used to control the IN and OUT ports of the voltage switch control chip U2. The IN port of the voltage switch control chip U2 is used as an input end to connect the input of an external power supply. The OUT of the voltage switch control chip U2 is used as an output end to power the low-power infrared temperature sensor 9, the battery power processing unit and the Lora module. The resistor R2 is used as a pull-down resistor to keep the voltage switch control chip U2 enabled. The two ends of the resistor R3 are respectively connected to the ILIM port and the GND interface of the voltage switch control chip U2, which are used to set the maximum current of the IN and OUT ports of the voltage switch control chip U2, and the resistors R2 and R3 are grounded. Specifically, the processing circuit can realize the operation of the power supply management unit in the daily low-power consumption mode, and when crude oil or water appears in the packing, the normal power consumption mode is immediately awakened so that the staff can perform timely maintenance accordingly.

[0069] The battery power processing unit is used to analyze the power information of the external battery; specifically, since the external battery is used to power the system, the power of the external battery is very important to the entire system. If the power of the external battery is too low, the entire system will be disabled. Therefore, the battery power processing unit includes an analog-to-digital converter for converting the external battery power information into a digital signal; the DMA bus is used to directly read the digital signal; specifically, the analog-to-digital converter can directly convert the external battery power information into a digital signal. The DMA bus is a technology that allows external devices or internal subsystems to directly read and write system memory without CPU intervention. The main purpose of DMA is to improve data transmission efficiency and reduce the burden on the CPU, especially in tasks that require large amounts of data transmission. It should be noted that the analog-to-digital converter and the DMA bus are both existing technologies and will not be elaborated here.

[0070] The Lora module is used to transmit the status of the packing and the pumping unit bare rod 3; specifically, when crude oil or water appears in the packing, in order to notify the staff as soon as possible, communication equipment is also needed to transmit signals, so the Lora module is connected to the explosion-proof antenna 10, and the Lora module is provided with a communication address dip switch and a sampling time dip switch as the address code when the slave station is working.

[0071] The present invention can make the whole system run in low power consumption mode during daily work, and only obtain the information of low power consumption oil and water detection sensor 14 to ensure that the staff is notified at the first time when packing leakage occurs, and periodically wake up the whole system to obtain the information of external battery power and low power consumption infrared temperature measurement sensor 9 to ensure that when the bare rod is dry-ground, the staff is notified as soon as possible for maintenance. Compared with the common automatic monitoring system, the standby time of the whole system is longer, and there is no need to set up a large number of wires and frequently change power supplies, which can effectively save human resources and ensure the real-time nature of triggering the alarm when the pumping unit packing is leaking or the bare rod is dry-ground.

[0072] like Figure 7 As shown, the present invention also proposes a monitoring method for an automatic monitoring system for oil pumping unit packing leakage and polished rod dry grinding, which specifically includes the following steps:

[0073] S1, judging whether oil and water are detected in the packing according to the signal obtained by the low-power oil and water detection sensor 14;

[0074] If yes, proceed to step S3;

[0075] If not, then end;

[0076] S2, determine whether the timing in the RTC unit has expired;

[0077] If yes, proceed to step S3;

[0078] If not, then end;

[0079] S3. Wake up the normal power consumption mode of the power supply management unit and power the low-power infrared temperature sensor 9, the battery power processing unit and the Lora module; specifically, when waking up the normal power consumption mode of the power supply management unit, first initialize the DMA bus, the analog-to-digital converter and the RTC unit to ensure that the above components respond quickly and accurately.

[0080] S4, Lora module transmits the polished rod temperature, ambient temperature, oil and water information in the packing and external battery power information; specifically, when testing the polished rod temperature, it is necessary to read 30 points continuously at intervals of 0.5 seconds;

[0081] S5. Reset the timing of the RTC unit and turn on the low power consumption mode of the power management unit.

[0082] Those skilled in the art can understand that all or part of the steps in the following embodiments can be completed by instructing the relevant hardware through a program, so the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can be in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0083] The above implementation methods have been described in detail. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An automatic monitoring device for packing leakage and polished rod dry grinding of a pumping unit, comprising a packing box pressure cap (1) and a pumping unit polished rod (3) arranged on the top of the packing box pressure cap (1), wherein the bottom end of the pumping unit polished rod (3) passes through the packing box pressure cap (1), and is characterized in that: A monitoring device (2) is provided at the top of the packing box pressure cap (1), and the monitoring device (2) comprises an explosion-proof control box (11). A positioning structure is provided on one side of the explosion-proof control box (11), and the positioning structure is used to fix the explosion-proof control box (11) at the top of the packing box pressure cap (1). A test structure is provided on one side of the positioning structure, and the test structure is used to monitor working information. The explosion-proof control box (11) is used to issue an early warning based on the working information, and the working information includes the ambient temperature, the surface temperature of the oil pumping unit bare rod (3), and whether water or crude oil exists in the positioning structure.

2. The automatic monitoring device for oil pump packing leakage and polished rod dry grinding according to claim 1 is characterized in that: The positioning structure comprises two positioning members (6), the two positioning members (6) forming a circular positioning ring, the positioning ring being sleeved on the outer wall of the packing box pressure cap (1), a hinge (7) being provided on one side of the positioning ring, the hinge (7) being used to connect the two positioning members (6) and enable the two positioning members (6) to rotate relative to each other, and a buckle (15) being provided on the other side of the positioning ring, the buckle (15) being used to limit the relative rotation of the two positioning members (6).

3. The automatic monitoring device for oil pumping unit packing leakage and polished rod dry grinding according to claim 2 is characterized in that: The top of the positioning member (6) is fixedly connected to a device box cover (8), the inner wall of the device box cover (8) is fixedly connected to a nitrile rubber, and the inner side of the nitrile rubber is in contact with the side wall of the oil pumping unit polished rod (3).

4. The automatic monitoring device for oil pumping unit packing leakage and polished rod dry grinding according to claim 1 is characterized in that: The test structure comprises a low-power consumption oil-water detection sensor (14), the low-power consumption oil-water detection sensor (14) comprising a stainless steel sensor body (18), the stainless steel sensor body (18) passing through the side wall of one of the positioning members (6) and fixedly connected to the positioning member (6), one end of the stainless steel sensor body (18) being fixedly connected to a transparent tempered glass (20), the inner side of the transparent tempered glass (20) being provided with a monitoring circuit board (19), the other end of the stainless steel sensor body (18) being fixedly connected to a first waterproof cable protection joint (17), the inner wall of the first waterproof cable protection joint (17) being plugged with a first crude oil resistant cable (16).

5. The automatic monitoring device for oil pump packing leakage and polished rod dry grinding according to claim 2 is characterized in that: The test structure further comprises a low-power infrared temperature sensor (9), the low-power infrared temperature sensor (9) comprising a second waterproof cable protection joint (22), wherein a fixing plate is fixedly connected to the top of one of the positioning members (6), the second waterproof cable protection joint (22) penetrates the fixing plate and is fixedly connected to the fixing plate, one end of the second waterproof cable protection joint (22) is fixedly connected to a sensor body (23), one end of the sensor body (23) away from the second waterproof cable protection joint (22) is fixedly connected to a pressure cap (26), an infrared temperature probe (25) is arranged on the inner side of the pressure cap (26), the end of the infrared temperature probe (25) away from the pressure cap (26) is provided with a circuit board (24), the end of the circuit board (24) away from the infrared temperature probe (25) is provided with a second crude oil resistant cable (21), and the second crude oil resistant cable (21) and the second waterproof cable protection joint (22) are plug-fitted.

6. An automatic monitoring system for realizing the automatic monitoring device for packing leakage and polished rod dry grinding of a pumping unit as claimed in any one of claims 1 to 5, characterized in that: include: An information collection module, wherein the information collection module is used to obtain work information; An information processing module, the information processing module is used to control the power supply output according to the working information, and to determine the status of the packing and the polished rod (3) of the oil pump according to the working information; A Lora module is used to transmit the status of the packing and the polished rod (3) of the oil pump.

7. The automatic monitoring device for oil pump packing leakage and polished rod dry grinding according to claim 6 is characterized in that: The information collection module includes: A temperature monitoring unit, the temperature monitoring unit being used to monitor the ambient temperature and the surface temperature of the polished rod (3) of the oil pump; An oil-water monitoring unit, the oil-water monitoring unit is used to monitor the liquid in the packing; A battery power acquisition unit is used to acquire the power information of an external battery.

8. The automatic monitoring device for oil pump packing leakage and polished rod dry grinding according to claim 6 is characterized in that: The information processing module includes: A power supply management unit, the power supply management unit is used to control the power supply module, the power supply management unit has two modes: low power consumption and normal power consumption. The low power consumption mode only supplies power to the oil-water monitoring unit and the RTC unit, and the normal power consumption mode is used to supply power to the low power consumption infrared temperature sensor (9), the battery power processing unit and the Lora module; An RTC unit, wherein the RTC unit is used to periodically wake up the normal power consumption mode of the power supply management unit; A processing circuit, the processing circuit being used to perform pre-processing on information acquired by the low-power oil-water detection sensor (14) to generate a wake-up signal for waking up the normal power consumption mode of the power supply management unit; A battery power processing unit is used to analyze external battery power information.

9. The automatic monitoring device for oil pumping unit packing leakage and polished rod dry grinding according to claim 8 is characterized in that: The processing circuit includes a microcontroller U1, a voltage switch control chip U2, a capacitor C1, a resistor R1, a resistor R2 and a resistor R3; The signal Leakin obtained by the low-power oil-water detection sensor (14) is input into the processing circuit in two ways. One way enters the WakeUp port of the microcontroller U1 through the capacitor C1 to wake up the normal power consumption mode of the power management unit; the other way enters the IO port of the microcontroller U1 as an oil-water monitoring alarm signal, and the resistor R1 is grounded to keep the microcontroller U1 enabled; The PowerEn port of the microcontroller U1 outputs the signal received by the WakeUp port to the EN port of the voltage switch control chip U2, which is used to control the IN and OUT ports of the voltage switch control chip U2. The IN port of the voltage switch control chip U2 is used as an input port for connecting the input of an external power supply. The OUT port of the voltage switch control chip U2 is used as an output port for powering the low-power infrared temperature sensor (9), the battery power processing unit and the Lora module. The resistor R2 is used as a pull-down resistor to keep the voltage switch control chip U2 enabled. The two ends of the resistor R3 are respectively connected to the ILIM port and the GND interface of the voltage switch control chip U2, which are used to set the maximum current of the IN and OUT ports of the voltage switch control chip U2, and the resistors R2 and R3 are grounded.

10. The automatic monitoring device for oil pump packing leakage and polished rod dry grinding according to claim 8, characterized in that: The battery power processing unit comprises an analog-to-digital converter, which is used to convert the external battery power information into a digital signal; and a DMA bus, which is used to directly read the digital signal.

Images