Oil leakage monitoring device for speed reducer of oil pumping unit

Abstract

The invention relates to the technical field of field equipment safety, in particular to an oil leakage monitoring device for a speed reducer of an oil pumping unit. The oil leakage monitoring device for the speed reducer of the oil pumping unit comprises a main machine and a plurality of auxiliary machines, the main machine is connected with each auxiliary machine at the same time, the auxiliary machines monitor targets and send signals to the main machine, and the main machine calculates and integrates the signals and sends the signals to a digital operation and maintenance device for alarm information reporting; the extension sets fix the oil level sensor through the fixing frame, the oil level sensor monitors the oil level through ultrasonic waves, and the alarm device sends an alarm signal to the host. According to the oil leakage monitoring device for the speed reducer of the oil pumping unit, the oil level is monitored through ultrasonic waves, the accuracy is not influenced by the environment, the situation of misjudgment is reduced, and a worker can be prompted to respond when an oil leakage accident suddenly occurs; meanwhile, the device is installed outside glass of the observation opening without changing the original structure of the device, maintenance is convenient, contact with oil is avoided, and potential safety hazards of fire disasters are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of on-site equipment safety, and particularly to an oil leakage monitoring device for a pumping unit reducer. Background Art

[0002] During the oilfield development and production process, the method of manual regular inspection is usually adopted. The inspection personnel judge whether there is oil leakage or oil shortage by observing the page height in the reducer on site. However, the accuracy of the observation is affected by the experience and line of sight of the inspection personnel and is prone to misjudgment. At the same time, it cannot respond in time when sudden oil leakage occurs. In the prior art, there is a device for detecting oil shortage in a reducer, which uses the principle of communicating vessels to connect an oil tank outside the reducer and is provided with a floating ball in the oil tank. The oil level of the reducer is measured by measuring the height of the floating ball. This method is not applicable to the reducer oil with high viscosity, and has relatively strict requirements for the installation position conditions, is not applicable to the oil level measurement in small volumes and complex conditions, and is not conducive to maintenance because it must be installed inside the fuel tank. At the same time, the spherical sensor must be in direct contact with the lubricating oil, which is not conducive to fire prevention and has great potential safety hazards for use in flammable and explosive spaces. Therefore, in view of the above deficiencies, an oil leakage monitoring device for a pumping unit reducer 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 an oil leakage monitoring device for a pumping unit reducer, which solves the problems that the accuracy of observation is affected by the experience and line of sight of the inspection personnel, cannot be applied to the monitoring of all oil qualities, and at the same time the sensor must be in direct contact with the lubricating oil, which is not conducive to fire prevention.

[0004] (II) Technical Solutions To solve the above problems, the present invention provides an oil leakage monitoring device for a pumping unit reducer, including: A host and several slave units, the host is connected to each slave unit at the same time, and the slave units are installed at the working positions to monitor the target and send the detection signals to the host; the host is connected to the digital operation and maintenance device at the work site, calculates and integrates the signals of the slave units and sends them to the digital operation and maintenance device for reporting alarm information; Each slave unit includes an oil level sensor, a fixing frame and an alarm device. The fixing frame is installed outside the glass of the oil level inspection window, the oil level sensor is installed on the fixing frame, and the oil level sensor is connected to the alarm device; an ultrasonic induction device capable of simultaneously emitting and receiving ultrasonic waves is provided in the oil level sensor, and the liquid level in the oil level pop-up window is measured by ultrasonic waves; the oil level sensor sends the monitored oil level signal to the alarm device, and the alarm device judges whether the device leaks oil according to the oil level height and oil level change information and sends an alarm signal to the host.

[0005] Preferably, both the transmitting end and the receiving end of the ultrasonic sensing device in the oil level sensor are closely attached to the outer wall of the oil level bullet window.

[0006] Preferably, the fixing bracket is fixed outside the glass of the oil level detection window by means of adhesion.

[0007] Preferably, the fixing bracket is provided with a mounting groove, the size of the mounting groove matches the oil level sensor, and the oil level sensor is installed in the mounting groove.

[0008] Preferably, fixing blocks are provided in the mounting groove of the fixing bracket, and the oil level sensor is fixed in the mounting groove by the fixing blocks.

[0009] Preferably, the ultrasonic sensing device in the oil level sensor determines the liquid level in the device by calculating the time when the ultrasonic wave is reflected and folded back.

[0010] Preferably, the wavelength of the ultrasonic wave is different after being reflected on the surfaces of different objects. A filter is provided at the receiving end of the ultrasonic sensing device to filter the ultrasonic waves reflected back other than the target medium.

[0011] Preferably, a wireless signal transmission module is provided in both the main unit and the extension unit, and the monitoring signal is transmitted between the extension unit and the main unit through the wireless signal transmission module.

[0012] (III) Beneficial effects The oil leakage monitoring device for the pumping unit reducer provided by the present invention uses ultrasonic waves to monitor the oil level in real time. The accuracy of the monitoring result will not change due to the influence of the environment on the line of sight, reducing the occurrence of misjudgment. When a sudden oil leakage accident occurs, the device can send an alarm signal immediately to prompt the staff to respond; at the same time, using ultrasonic waves to monitor the liquid level of the device does not require changing the original structure of the device and can take effect on any medium; by installing the device outside the glass of the observation port, it is convenient for maintenance, and at the same time, it does not contact the oil liquid, reducing the potential safety hazard of fire. Brief description of the drawings

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

[0014] Among them, 1. Oil level sensor; 2. Fixing bracket; 3. 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 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 efforts 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 based on the orientation or positional relationship shown in the drawings. The purpose is only to facilitate the description of the present invention and simplify the description, and does not indicate or imply that the indicated components must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present invention.

[0017] As Figure 1 shown, the present invention provides an oil leakage monitoring device for a pumping unit reducer, which specifically includes: a main unit and several sub-units. The sub-units are installed at the working positions to monitor the oil level of the monitoring target in real time; the main unit is connected to each sub-unit at the same time. During operation, the sub-units send the monitored liquid level data to the main unit. At the same time, the main unit is connected to the digital operation and maintenance device at the work site. After sorting out the information received from the sub-units, the main unit reports the alarm information through the digital operation and maintenance equipment uniformly.

[0018] Among them, wireless communication modules are provided in both the main unit and the sub-units. The sub-units and the main unit transmit information through the wireless communication modules. The main unit can receive and process the signals of all sub-units within a certain range, without the need for a large amount of wiring, improving the working efficiency of the device and reducing the workload during installation and maintenance of the device.

[0019] It should be noted that a communication conversion module is provided in the main unit. When the digital operation and maintenance device cannot identify the alarm signal of the sub-unit, before sending information to the digital operation and maintenance device at the site, the main unit converts the alarm signal into a signal specification that the digital operation and maintenance device can identify through the communication conversion module, preventing the device from malfunctioning due to unrecognized signals.

[0020] In the present invention, each extension machine includes an oil level sensor 1, a fixing bracket 2, and an alarm device 3; an ultrasonic induction device is provided inside the oil level sensor 1. The ultrasonic induction device can generate and receive ultrasonic signals and convert the received ultrasonic signals into electrical signals. The oil level sensor 1 is installed outside the oil level detection window glass of the speed reducer. The ultrasonic induction device emits ultrasonic waves into the speed reducer through the oil level detection window glass. The ultrasonic waves are emitted from the generating end of the ultrasonic induction device and enter the speed reducer. When they contact an object, they will refract and bounce back. The ultrasonic waves after refraction and bounce back return to the receiving end of the ultrasonic induction device and are received by the receiving end and converted into electrical signals. Since the speed of sound of the generated ultrasonic waves is fixed, the ultrasonic induction device can calculate the travel of the ultrasonic waves based on the time difference between the emission and reception of the ultrasonic waves, thereby calculating the oil level of the monitoring medium. The ultrasonic induction device sends the calculated oil level information after recovery to the alarm device 3. The alarm device 3 determines whether the speed reducer is short of oil or leaking oil based on the currently measured oil level value and the oil level change over a period of time, and then sends an alarm signal according to the judgment result and sends the alarm signal to the host computer. By repeating the above steps, the device realizes real-time monitoring of the oil level in the speed reducer. The device is installed outside the speed reducer for easy maintenance and repair. At the same time, the device does not directly contact the oil quality, greatly reducing the fire safety hazard in the closed device and improving the safety of the device.

[0021] Wherein, both the generating end and the receiving end of the ultrasonic induction device are closely attached to the outer wall of the glass of the oil level detection window, which can minimize the interference of the ultrasonic signal reflected back by the detection window glass on the monitoring result of the device, and improve the working efficiency and accuracy of the device.

[0022] It should be noted that a filtering device is provided at the receiving end of the ultrasonic induction device; during the process of refraction and bounce back of the ultrasonic waves when they contact an object, since the waveforms of the ultrasonic waves reflected after contacting different objects are different, the filtering device can filter the ultrasonic waves reflected back by the objects outside the monitoring substance, so that the electrical signals received and converted by the ultrasonic induction device are all signals generated by the monitoring target, reducing the amount of useless signals in the device, reducing the load of the device, and improving the working efficiency of the device.

[0023] Such as Figure 1 As shown, the fixing bracket 2 is installed outside the glass of the oil level detection window, and the oil level sensor 1 is installed on the fixing bracket 2 to fix the position of the oil level sensor 1 through the fixing bracket 2, preventing the oil level sensor 1 from loosening and falling off during the working process, resulting in device failure or damage, and improving the working stability of the device.

[0024] Among them, an installation groove is provided on the fixing bracket 2, and the shape and size of the installation groove are matched with the oil level sensor 1. The oil level sensor 1 is installed in the installation groove to improve the stability of the device. A fixing block is provided in the installation groove. After the oil level sensor 1 is installed in the installation groove, the fixing block is inserted into the installation groove to clamp the oil level sensor 1, further fixing and clamping the oil level sensor 1.

[0025] It should be noted that the fixing bracket 2 is generally installed on the outer glass wall of the oil level detection window by gluing, which can not only maintain the stability of the device but also does not damage the glass of the detection window cover, improving the safety of the device. By connecting in a gluing manner, the workload during the replacement and disassembly of the device is greatly reduced, and at the same time, the cost required for installation is also greatly reduced, improving the economy of the device and reducing the workload during installation and maintenance of the device.

[0026] In addition, in order to adapt to different working environments and operation requirements, the fixing bracket 2 and the glass of the oil level detection window can be integrally formed during casting. After being formed, the detection window glass can directly install the oil level sensor 1 to detect the internal oil level. However, the manufacturing cost of this method is too high, and this method can be adopted when there are special requirements for the working environment and content. Embodiment

[0027] The following provides an embodiment of an oil leakage monitoring device for a pumping unit reducer of the present invention to illustrate the working process of the device.

[0028] In this embodiment, the alarm device and the host of the extension machine are both internally provided with an ATmega328P main control chip. The communication conversion module in the host adopts a TTL to RS485 communication module, and the wireless communication modules in the host and the extension machine are 2.4G wireless serial port modules.

[0029] In the host, the RX and TX pins of the ATmega328P main control chip form serial communication information with the TX and RX pins of the 2.4G wireless serial port module, and the 3.3V pin of the ATmega328P main control chip is used to supply power to the 2.4G wireless serial port module; the D1 and D2 pins of the ATmega328P main control chip are virtually formed into a soft serial port and connected to the TTL to RS485 communication module to convert the serial port information of TTL level into RS485 level, and the 5V and GND pins of the ATmega328P main control chip are used to supply power to this module.

[0030] The VCC, GND, and OUT pins of the ultrasonic sensing device are respectively connected to the 5V, GND, and D3 pins of the ATmega328P main control chip. When the oil level is normal, the OUT pin of the ultrasonic sensor is conducting with the internal VCC, sending a high-level signal to the D3 pin of the slave main control chip; when the oil level drops below the warning line, the OUT pin of the ultrasonic sensor is conducting with the internal GND, sending a low-level signal to the D3 pin of the slave main control chip. At this time, the information is sent to the host through the wireless serial port module. After receiving the alarm information, the host sends a signal through the D0 and D1 serial ports of the host to the TTL to RS485 communication module to process the signal into an RS485 signal that can be recognized by the remote RTU on the oil well to complete the transmission of the alarm information, notifying relevant personnel to carry out emergency repairs such as sealing the oil leakage and adding gear oil to the speed reducer on the oil well. Repeat the above process to achieve real-time monitoring of the oil level in the speed reducer.

[0031] Among them, the normal oil level and the oil level warning line can both be set in the ultrasonic sensor. By adjusting the set values of the normal oil level and the oil level warning line, the device can be applicable to various models of speed reducers.

[0032] The oil leakage monitoring device for the pumping unit speed reducer provided by the present invention has the accuracy of the monitoring result not affected by the environmental line of sight. When a sudden oil leakage accident occurs, the device can send an alarm signal immediately to prompt the staff to respond without changing the original structure of the device. It can take effect for any medium and does not come into contact with the oil fluid, reducing the safety hazard of fire. The specific working process of the device is as follows: First, install the host and slave of the device at the working position according to the working requirements and start the device.

[0033] Then, after the device is started, ultrasonic waves are periodically sent into the speed reducer. After the ultrasonic waves contact an object, they are refracted and reflected and received by the device. According to the time difference between the emission and reception, the travel of the ultrasonic waves is calculated, and then the oil level in the speed reducer is calculated.

[0034] After that, the ultrasonic sensing device sends the calculated oil level information to the alarm device. The alarm device judges whether the speed reducer is leaking oil or lacking oil based on the real-time oil level in the speed reducer and the change amount of the oil level in the speed reducer over a period of time, and sends an alarm message to the host according to the judgment result. The host converts the information signal into information that can be recognized by the on-site digital operation and maintenance device and sends it to the digital operation and maintenance equipment to report the alarm information, notifying the staff to make a response.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art 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 within the protection scope of the present invention.

Claims

1. An oil leakage monitoring device for a pumping unit speed reducer, characterized in that, Including: A host and several extension machines. The host is connected to each extension machine simultaneously. The extension machines are installed at the working positions to monitor the target and send the detection signals to the host. The host is connected to the digital operation and maintenance device at the work site, calculates and integrates the signals of the extension machines, and sends them to the digital operation and maintenance device for reporting alarm information. Each extension machine includes an oil level sensor (1), a fixing bracket (2), and an alarm device (3). The fixing bracket (2) is installed outside the glass of the oil level inspection window. The oil level sensor (1) is installed on the fixing bracket (2), and the oil level sensor (1) is connected to the alarm device (3). An ultrasonic induction device capable of simultaneously emitting and receiving ultrasonic waves is provided inside the oil level sensor (1) to measure the liquid level in the oil level inspection window through ultrasonic waves. The oil level sensor (1) sends the monitored oil level signal to the alarm device (3), and the alarm device (3) determines whether the device is leaking oil based on the oil level height and oil level change information and sends an alarm signal to the host.

2. The oil leakage monitoring device for a pumping unit speed reducer according to claim 1, wherein, Both the transmitting end and the receiving end of the ultrasonic induction device inside the oil level sensor (1) are closely attached to the outer wall of the oil level inspection window.

3. The oil leakage monitoring device for a pumping unit speed reducer according to claim 1, characterized in that The fixing bracket (2) is fixed outside the glass of the oil level inspection window by gluing.

4. The oil leakage monitoring device for a pumping unit speed reducer according to claim 1, characterized in that, The fixing bracket (2) is provided with an installation groove, and the size of the installation groove matches that of the oil level sensor (1). The oil level sensor (1) is installed in the installation groove.

5. The oil leakage monitoring device for a pumping unit speed reducer according to claim 4, characterized in that, Fixing blocks are provided in the installation groove of the fixing bracket (2) to fix the oil level sensor (1) in the installation groove.

6. The oil leakage monitoring device for a pumping unit speed reducer according to claim 1, characterized in that, The ultrasonic induction device inside the oil level sensor (1) determines the liquid level inside the device by calculating the time when the ultrasonic wave is reflected and folded back.

7. The oil leakage monitoring device for the pumping unit speed reducer according to claim 6, characterized in that The wavelength of the ultrasonic wave is different after being reflected from different object surfaces. A filter is provided at the receiving end of the ultrasonic induction device to filter the ultrasonic waves reflected back other than the target medium.

8. The oil leakage monitoring device for a pumping unit speed reducer according to claim 1, characterized in that, Wireless signal transmission modules are provided inside both the host and the extension machines, and the monitoring signals are transmitted between the extension machines and the host through the wireless signal transmission modules.

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