Pumping unit packing water leakage and oil leakage monitoring device

Abstract

The invention relates to the technical field of oil production engineering, in particular to a pumping unit packing water leakage and oil leakage monitoring device. The pumping unit packing water leakage and oil leakage monitoring device comprises a main machine and an auxiliary machine, the auxiliary machine comprises an alarm device and a water collecting box installed below a packing needing to be monitored, a strain sensor and a water immersion sensing probe are arranged in the water collecting box, and the strain sensor and the water immersion sensing probe are both connected with the alarm device. According to the pumping unit packing water leakage and oil leakage monitoring device, the extension set is installed at the position of the packing needing to be detected to detect the state of the packing and send a signal to the main machine, real-time monitoring of the state of the packing is achieved, and an alarm signal can be sent in time to enable a worker to make a response in the case of sudden abnormity; leakage liquid is measured through the strain sensor and the water immersion sensing probe, the influence of the field environment on the measurement result can be eliminated, the measurement accuracy of the device is improved, and the situation of misjudgment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production engineering, and particularly to a monitoring device for leakage of packing and oil in a pumping unit. Background Art

[0002] During the development of oil fields, the oil level of the pumping unit and the observation hole of the packing of the pumping unit are mainly observed by manual regular inspection, so as to judge whether the device is short of oil or leaking and whether the packing state is intact. However, the observation effect of this method is affected by the experience of the inspection personnel and the environmental light, and at the same time, it cannot quickly respond to sudden oil leakage and water leakage. In the prior art, there is a detection device for the state of the packing of a water pump, which collects the leaked liquid of the water pump through a liquid collecting box and measures the lifting weight to judge the state of the packing of the water pump and the situation of the leaked liquid. However, due to the influence of the installation environment of the liquid collecting box, when dust in the surrounding environment accumulates on the liquid collecting box and when the wind force in the surrounding environment is large, the reading of the weight sensor will change, resulting in misjudgment of the device and affecting the accuracy of the detection effect of the device. Therefore, in view of the above deficiencies, a monitoring device for leakage of packing and oil in a pumping unit is proposed. Summary of the Invention

[0003] (I) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides a monitoring device for leakage of packing and oil in a pumping unit, which solves the problems that the detection result is affected by the environment, the experience and sight of the inspection personnel, resulting in misjudgment of the device and low accuracy of the measurement effect.

[0004] (II) Technical Solutions To solve the above problems, the present invention provides a monitoring device for leakage of packing and oil in a pumping unit, including: A main unit and a plurality of sub-units; the sub-units are installed on the packings of each pumping unit to be detected, and the main unit is connected to each sub-unit at the same time, receives the alarm signals of each sub-unit and transmits the alarm signals to the digital operation and maintenance center; The sub-unit includes a water collecting box and an alarm device. The water collecting box is provided with a water immersion induction probe and a strain sensor. The water immersion induction probe and the strain sensor are respectively connected to the alarm device. The water immersion induction probe and the strain sensor transmit signals to the alarm device. When the signals transmitted by the water immersion induction probe and the strain sensor change, the alarm device can issue an alarm signal; the water collecting box is installed at the detection position to receive the leaked liquid of the device to be detected into the water collecting box. When the water immersion induction probe contacts the water in the leaked liquid, the transmitted signal changes. When the oil in the leaked liquid squeezes the strain sensor and deforms, the transmitted signal changes.

[0005] Preferably, the alarm device is connected to the main unit of the remote control system for remote real-time monitoring.

[0006] Preferably, the water immersion induction probe is made of two independent screw rods. The two screw rods are respectively connected to the alarm device and do not contact each other. When water flows into the water collection box, the two screw rods are electrically connected through the water, and the signal sent by the water immersion induction probe to the alarm device changes.

[0007] Preferably, both of the two screw rods are low-resistance screw rods, and the two screw rods are arranged in parallel with a spacing of 2 millimeters.

[0008] Preferably, a main chip is provided in the alarm device. The two screw rods are respectively connected to two pins of the main chip. When water enters the water collection box and conducts the two screw rods, the circuit signal between the two pins changes and an alarm signal is sent through the main chip.

[0009] Preferably, the water collection box includes a left water collection box and a right water collection box with the same shape. The left water collection box and the right water collection box are symmetrically arranged and symmetrically buckled, and an installation groove matching the shape of the detection device is provided at the buckling position.

[0010] Preferably, wireless transmission devices are respectively provided inside the extension machine and the host machine, and the alarm signal of the extension machine is sent to the host machine through wireless signals.

[0011] Preferably, a plurality of sensitive grids are provided in the strain inductor. When the sensitive grids are deformed under force, their own resistance changes due to the strain effect, and the alarm device measures the resistance change of the strain inductor and changes the alarm signal according to the measurement result.

[0012] (III) Beneficial Effects The oil pumping unit packing leakage and oil leakage monitoring device provided by the present invention realizes real-time monitoring of the packing state by installing the extension machine at the packing to be detected and sending the signal to the host machine, and can send an alarm signal in time in the face of sudden abnormalities to enable the staff to make responses; by measuring the liquid leakage through the strain inductor and the water immersion induction probe, the influence of the on-site environment on the measurement result can be eliminated, the measurement accuracy of the device can be improved, and the occurrence of misjudgment can be reduced. Brief Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of the oil pumping unit packing leakage and oil leakage monitoring device of the present invention.

[0014] Among them, 1. Water collection box; 2. Strain inductor; 3. Water immersion induction probe; 4. Alarm device. Embodiment

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0016] In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by "upper", "lower", "inner", "outer", "top", "bottom", etc. is all based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0017] As Figure 1 shown, the present invention provides a monitoring device for leakage of packing and oil leakage of a pumping unit, which specifically includes: a host and a plurality of slave units. The slave units are installed on the packings of each pumping unit to be detected to monitor the liquid leakage condition of the packing in real time. After the liquid leakage of the packing is collected by the slave unit, the slave unit sends an alarm signal. The host is installed and connected to each slave unit at the same time. The slave unit sends the alarm signal to the host, and the host calculates the wear degree of each packing of the pumping unit according to the alarm signal of the slave unit and sends the calculation result and the alarm signal to the digital operation and maintenance center after sorting, warning the staff, so that the staff can repair the wear and liquid leakage of the packing in the first time. When a sudden packing wear accident occurs, the staff can respond in time.

[0018] Among them, wireless transmission devices are respectively provided in the host and the slave units. The slave unit sends the measured data to the host through wireless transmission, and the host converts the received signal and sends it to the digital operation and maintenance center. Through the wireless transmission device, a host can receive the signals of all slave units within the range, convert and send them, improving the working efficiency of the device. At the same time, there is no need for wired transmission, reducing the workload in operation and maintenance work.

[0019] It should be noted that in this embodiment, a 2.4G wireless serial port module is provided in the slave unit and the host for wireless communication.

[0020] In the present invention, the slave unit includes a water collecting box 1 and an alarm device 4. The water collecting box 1 is installed at the packing to be detected. When the packing wears and leaks liquid, measuring the liquid in the water collecting box 1 can judge the liquid leakage condition of the packing; the alarm device 4 calculates the liquid leakage amount according to the measurement result of the liquid leakage of the water collecting box 1, calculates and judges the wear condition of the packing, and then transmits the signal to the host.

[0021] Among them, the water collection box 1 includes a left water collection box and a right water collection box with the same shape. The left water collection box and the right water collection box are buckled and fixed under the packing to be detected to collect the leaked liquid of the packing. After the left and right water collection boxes are assembled, an installation groove similar to the shape of the packing is provided at the middle position. The leaked liquid of the packing flows downward along the pipeline and into the water collection box 1 through the installation groove.

[0022] It should be noted that one end of the left and right water collection boxes is connected by a hinge so that they can be opened and closed horizontally. A buckle is provided at the other end. By closing the buckle, the left and right water collection boxes can be installed in the working position, reducing the installation difficulty of the device and improving the work efficiency.

[0023] As Figure 1 shown, a strain sensor 2 is provided in the water collection box 1. The strain sensor 2 is connected and cooperated with an alarm device 4 to measure the leaked liquid in the device. Based on the strain effect, the resistance of the stress sensor 2 will change after deformation. By measuring the change in the resistance of the stress sensor 2 by the alarm device 4, the oil leakage amount of the packing can be calculated and an alarm signal can be sent. During the working process, due to the certain viscosity of petroleum, the petroleum in the leaked liquid will accumulate in the liquid collection box. When it accumulates to a certain extent, it will squeeze the strain sensor 2 and cause the resistance of the strain sensor 2 to change. At the same time, after the outdoor temperature reaches below zero in winter, the water leaked from the packing will quickly freeze and present a solid state. At this time, the fixture will also squeeze the stress sensor like oil, causing its resistance value to change.

[0024] Among them, the strain sensor 2 is a strain gauge made of semiconductor. The position of the strain gauge in the water collection box 1 is fixed to prevent the position from changing under the extrusion of the leaked liquid, resulting in inaccurate measurement effect of the device and misjudgment.

[0025] It should be noted that a sensitive grid is provided on the strain gauge. The sensitive grid is connected to the alarm device 4. When the strain gauge deforms, the sensitive grid deforms synchronously, causing its own resistance to change. After the alarm device 4 measures the change in the resistance in the sensitive grid, it calculates the deformation amount of the device and sends an alarm signal.

[0026] In the present invention, a water immersion induction probe 3 is provided in the water collection box 1. The water immersion induction probe 3 is connected to the alarm device 4. After the water immersion induction probe 3 contacts water, the alarm device 4 sends an alarm signal to the host for alarm.

[0027] Among them, the water immersion induction probe 3 includes two non - contacting screw rods. One end of the screw rod is connected to the alarm device 4, and the other end is placed in the water collection box 1. When the water in the liquid leakage enters the water collection box 1, the two screw rods are connected through the water. At this time, the circuit connecting the two screw rods in the alarm device 4 changes from an open circuit to a closed circuit, and the alarm device 4 sends an alarm signal to the host. Generally, the two screw rods are placed parallel with a distance of two millimeters between them, ensuring that the two screw rods can simultaneously contact the water in the liquid leakage and be connected in the first time, improving the reaction efficiency of the device. Embodiment

[0028] Now, an implementation manner of the oil pumping unit packing leakage and oil leakage monitoring device of the present invention is provided. The alarm device 4 is provided with an ATmega328P chip and a magnetic sensor. The ATmega328P chip is respectively connected to the water immersion induction probe 3 and the strain sensor 2. The two screw rods in the water immersion induction probe 2 are respectively connected to the GND and D3 pins of the ATmega328P chip. The D3 pin is made to present a high level through a pull - up resistor. When the packing leaks water and enters the water collection box 1 to connect the two screw rods, the potential of D3 will be pulled down to the same as GND. The internal interrupt of the ATmega328P chip occurs and alarm processing is carried out, and the alarm signal and information are sent to the host.

[0029] The strain sensor 2 is connected to the magnetic sensor. The three pins of the magnetic sensor, namely GND, VCC, and A0, are respectively connected to the GND, 5V, and A0 pins of the ATmega328P chip. The A0 of the magnetic sensor sends a corresponding voltage value of 0 - 5V to the A0 pin of the ATmega328P chip according to the deformation degree of the strain sensor. The upper and lower limits of the alarm value are set for the voltage according to the actual situation. When the voltage value exceeds the set range, the ATmega328P chip sends an alarm signal to the host.

[0030] At the same time, a communication module is also provided in the host, which converts the signal in the host into a signal that can be recognized by the oil well remote transmission terminal, and then sends the signal to the oil well remote transmission terminal, thereby transmitting the alarm signal to the digital operation and maintenance center.

[0031] The oil pumping unit packing leakage and oil leakage monitoring device provided by the present invention can realize the real - time monitoring of the packing state, send an alarm signal in time when facing a sudden anomaly to enable the staff to make a response, can eliminate the influence of the on - site environment on the measurement result, improve the measurement accuracy of the device, and reduce the occurrence of misjudgment. The specific working process of the device is as follows: First, install the device under the flange to be detected according to the working requirements and start the device.

[0032] Then, when the flange wears and leaks liquid, the leaked liquid flows downward into the water collecting box. When there is water in the leaked liquid, the water connects the water immersion induction probe in the water collecting box, and at this time, the alarm device sends an alarm signal to the host; when there is oil leakage in the leaked liquid, due to the viscosity of the oil, it accumulates in the water collecting box. When the accumulation reaches a certain level, it squeezes the strain inductor to cause deformation, and the alarm device judges the oil leakage amount according to the resistance change of the strain inductor and sends an alarm signal to the host.

[0033] In winter, when the outdoor environment reaches below zero, the water leaking from the packing will quickly freeze into a solid. At this time, the solid water will accumulate in the water collecting box like oil and gradually squeeze the strain inductor to deform and then send an alarm signal.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil pumping unit packing leakage and oil leakage monitoring device, characterized in that, Including: A main unit and several extension units; the extension units are installed on the stuffing boxes of each pumping unit to be monitored, and the main unit is connected to each extension unit at the same time, receiving the alarm signals of each extension unit and transmitting the alarm signals to the digital operation and maintenance center; The extension unit includes a water collecting box (1) and an alarm device (4). The water collecting box (1) is provided with a water immersion induction probe (3) and a strain sensor (2). The water immersion induction probe (3) and the strain sensor (2) are respectively connected to the alarm device (4). The water immersion induction probe (3) and the strain sensor (2) transmit signals to the alarm device (4). When the signals transmitted by the water immersion induction probe (3) and the strain sensor (2) change, the alarm device (4) can emit an alarm signal; the water collecting box (1) receives the liquid leakage of the device to be detected into the water collecting box (1). When the water immersion induction probe (3) contacts the water in the liquid leakage, the transmitted signal changes. When the oil quality in the liquid leakage squeezes the strain sensor (2) to deform, the transmitted signal changes.

2. The oil pumping unit packing leakage and oil leakage monitoring device according to claim 1, characterized in that, The alarm device (4) is connected to the main unit of the remote control system for remote real-time monitoring.

3. The oil pumping unit packing leakage and oil leakage monitoring device according to claim 1, characterized in that, The water immersion induction probe (3) is made of two independent screw rods. The two screw rods are respectively connected to the alarm device (4) and do not contact each other. When water flows into the water collecting box (1), the two screw rods are conducted through the water, and the signal sent by the water immersion induction probe (3) to the alarm device (4) changes.

4. The monitoring device for leakage of packing and oil of the pumping unit according to claim 3, characterized in that Both of the two screw rods are low-resistance screw rods, and the two screw rods are arranged in parallel with a spacing of 2 millimeters.

5. The oil pumping unit packing leakage and oil leakage monitoring device according to claim 3, characterized in that, The alarm device is provided with a main chip. The two screw rods are respectively connected to two pins of the main chip. When water enters the water collecting box (1) and conducts the two screw rods, the circuit signal between the two pins changes and an alarm signal is sent through the main chip.

6. The oil pumping unit packing leakage and oil leakage monitoring device according to claim 1, characterized in that The water collecting box (1) includes a left water collecting box and a right water collecting box with the same shape. The left water collecting box and the right water collecting box are symmetrically arranged and symmetrically buckled, and an installation groove matching the shape of the detection device is provided at the buckling position.

7. The oil pumping unit packing leakage and oil leakage monitoring device according to claim 1, characterized in that Wireless transmission devices are respectively arranged inside the extension unit and the main unit, and the alarm signal of the extension unit is sent into the main unit through wireless signals.

8. The monitoring device for leakage of packing and oil of pumping unit according to claim 1, characterized in that, The strain sensor (2) is provided with several sensitive grids. When the sensitive grids are deformed by force, due to the strain effect, their own resistance changes. The alarm device (4) measures the resistance change of the strain sensor (2) and changes the alarm signal according to the measurement result.

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