Tightness monitoring device and oil pumping unit

Abstract

The invention provides a tightness monitoring device and an oil pumping unit, the tightness monitoring device is used for tightness detection of a transmission device, the transmission device comprises a first transmission wheel, a second transmission wheel and a transmission member, the first transmission wheel and the second transmission wheel are in transmission through the transmission member, and the tightness monitoring device comprises a first temperature sensor, a second temperature sensor and a controller, the temperature sensor is used for acquiring transmission part surface temperature; the adjusting device is arranged corresponding to the transmission part and can move towards the transmission part and press the transmission part; the judging device is connected with the first temperature sensor and used for judging whether the transmission part is in a target state or not based on the surface temperature of the transmission part; the control device is used for controlling the adjusting device to move towards the transmission part and press the transmission part when the judgment device judges that the transmission part is in the target state, so that the transmission part is in a tensioned state; the first temperature sensor includes a non-contact sensor.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pumping units, and in particular relates to a tightness monitoring device and an oil pumping unit. Background Art

[0002] When the beam pump is in operation, the power is supplied by the motor, which is transmitted to the driven wheel through the transmission device and then to the crankshaft of the pump through the reduction box. The crankshaft converts the rotational motion into the reciprocating motion of the pump to perform oil extraction operations. During the operation of the pump, when the transmission device is installed too loose or too tight, the service life is too long, or it encounters rainy and snowy weather, the transmission device of the pump will slip, which will directly affect the stable operation of the pump. In severe cases, it will cause damage to the transmission device and cause the oil well to stop production. At present, when detecting the tightness of the transmission device, it is usually judged whether it needs to be tightened based on the speed difference between the two wheels. However, this scheme of judging whether it needs to be tightened based only on the speed difference between the two wheels has the following disadvantages: on the one hand, under different working conditions, there is a certain speed difference between the two wheels within a certain allowable range, and the speed difference within the allowable range is difficult to grasp, which leads to misjudgment of the device; on the other hand, the judgment condition is single, resulting in low accuracy of judgment.

[0003] In addition, the current temperature monitoring of motors is to embed temperature monitoring probes in the stator windings to monitor the motor temperature. According to field investigations, the motors commonly used in oil pumps do not have the conditions for embedding temperature monitoring probes, and usually have no temperature detection, so the operating temperature of the motor cannot be accurately monitored, which increases the probability of motor failure.

[0004] In addition, during the oil and gas production process, some pumping units occasionally roll over due to mechanical failure. In order to solve the above problems, the pumping units are usually inspected regularly. However, due to the large area, large number of equipment and small number of personnel at the oil production site, the inspection interval is long and the effect is poor, and the problems of the pumping units running on site cannot be discovered in time.

[0005] Therefore, based on the above-mentioned problems of low accuracy in tightness judgment, easy rollover of the oil pump and easy damage to the motor, inventing a tightness monitoring device and an oil pump is a technical problem that needs to be solved urgently. Summary of the invention

[0006] An embodiment of the present invention provides a tightness monitoring device, mainly to solve problems such as slippage of the transmission device, motor temperature monitoring, pumping unit status monitoring, and inability of the pumping unit transmission system to automatically adjust. The present invention provides an automatic adjustment device and method for the pumping unit transmission system, which can timely detect the problem of the transmission device being loose, automatically adjust according to the internal logic, record and upload the adjusted data to the management personnel, reduce the work intensity and frequency of the management personnel in adjusting the transmission device, and effectively avoid the occurrence of pumping unit rollover accidents.

[0007] In the first aspect of the present invention, a tightness monitoring device is provided.

[0008] The tightness monitoring device provided by the present invention is used for detecting the tightness of the transmission device. The transmission device includes a first transmission wheel, a second transmission wheel, and a transmission member. The first transmission wheel and the second transmission wheel are driven by the transmission member. The tightness monitoring device includes: a first temperature sensor, arranged corresponding to the transmission member, for obtaining the temperature on the surface of the transmission member; an adjustment device, arranged corresponding to the transmission member, capable of moving towards the transmission member and pressing the transmission member; a judgment device, connected to the first temperature sensor, for judging whether the transmission member is in a target state based on the temperature on the surface of the transmission member; a control device, for controlling the adjustment device to move towards the transmission member and press the transmission member when the judgment device judges that the transmission member is in the target state, so that the transmission member is in a tension state; the first temperature sensor includes a non-contact sensor.

[0009] In some technical solutions, optionally, the non-contact sensor includes an infrared thermometer or a thermal imager.

[0010] In some technical solutions, optionally, the adjustment device includes: a driving device, connected to the control device; a pressing bearing, connected to the driving device and the transmission member, and the driving device can drive the pressing bearing to move towards the transmission member and press the transmission member.

[0011] In some technical solutions, optionally, the tightness monitoring device further includes: a rain sensor, arranged on the control device, connected to the judgment device, for detecting the environmental humidity; the judgment device can also jointly judge whether the transmission member is in a target state based on the environmental humidity and the temperature on the surface of the transmission member.

[0012] In some technical solutions, optionally, the transmission device further includes a motor, the motor is connected to one of the first transmission wheel or the second transmission wheel, for driving the first transmission wheel or the second transmission wheel to rotate, and the tightness monitoring device further includes: a detection device, connected to the motor and the judgment device, for detecting the current and rotation speed of the motor; the judgment device can jointly judge whether the transmission member is in a target state based on the current and rotation speed of the motor and the temperature on the surface of the transmission member.

[0013] In some technical solutions, optionally, the motor includes heat dissipation grooves, and the tightness monitoring device further includes a second temperature sensor disposed in the heat dissipation grooves for obtaining the temperature of the motor; the judgment device is further connected to the second temperature sensor, and the judgment device can also jointly judge whether the transmission member is in a target state based on the temperature of the motor and the temperature of the surface of the transmission member.

[0014] In some technical solutions, optionally, the tightness monitoring device further includes: a solar panel connected to the first temperature sensor and the second temperature sensor for converting light energy into electrical energy and supplying power to the first temperature sensor and the second temperature sensor; a charging protection device connected to the first temperature sensor and the second temperature sensor for performing charging protection on the first temperature sensor and the second temperature sensor.

[0015] The second aspect of the present invention provides a pumping unit, including: the tightness monitoring device provided in any technical solution of the first aspect of the present invention; a transmission device.

[0016] In some technical solutions, optionally, the pumping unit further includes: a crankcase connected to the transmission device; a three-axis displacement sensor disposed in the crankcase for detecting the tilt angle of the crankcase; a vibration sensor disposed in the crankcase for detecting the vibration frequency of the crankcase; a sound collection device disposed in the crankcase for collecting the sound of the pumping unit; the three-axis displacement sensor, the vibration sensor, and the sound collection device are all connected to the judgment device, and the judgment device can also judge whether the transmission member is in a target state according to at least one of the tilt angle of the crankcase, the vibration frequency of the crankcase, and the sound of the pumping unit.

[0017] In some technical solutions, optionally, the pumping unit further includes: a crankshaft disposed in the crankcase, the crankshaft is connected to the transmission device; a pumping unit walking beam connected to the crankshaft and capable of reciprocating under the action of the crankshaft; a hanger connected to the pumping unit walking beam; an oil production assembly connected to the hanger and capable of extending into an oil well to produce oil.

[0018] The beneficial effects brought by the present invention are as follows:

[0019] The present invention uses the comprehensive data of the operation of the motor and the pumping unit to judge whether there is a slipping problem in the transmission device of the pumping unit. When a slipping problem occurs in the transmission device of the pumping unit, the tightness of the transmission device can be automatically adjusted, reducing the labor intensity of employees for frequently adjusting the transmission device, improving the working efficiency of the pumping unit, and increasing the continuous operation of the equipment. In addition, the present invention can also monitor the temperature of the motor during the daily operation of the pumping unit, the temperature of the transmission device, and whether the sound of the pumping unit is abnormal, the vibration of the pumping unit base, and whether the pumping unit base is level, making the pumping unit operate more smoothly, safely and reliably. Description of the Drawings

[0020] Figure 1 Schematic structural diagram of the tightness monitoring device according to an embodiment of the present invention;

[0021] Figure 2 Schematic structural diagram of the adjustment device of the tightness monitoring device according to an embodiment of the present invention;

[0022] Figure 3 Schematic structural diagram of the motor part of the tightness monitoring device according to an embodiment of the present invention;

[0023] Figure 4 Schematic structural diagram of the solar panel part of the tightness monitoring device according to an embodiment of the present invention.

[0024] Among them, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0025] 1 pumping unit, 11 transmission device, 112 motor driving wheel, 113 driving wheel Hall switch, 114 driven wheel, 115 driven wheel Hall switch, 116 transmission member, 118 motor, 119 pulse signal sensor, 12 adjustment device, 122 driving device, 123 transmission mechanism, 124 pressing bearing, 125 bearing bracket, 132 first temperature sensor, 134 rain sensor, 135 control device, 136 heat dissipation groove, 137 second temperature sensor, 138 solar panel, 139 charging protection device, 142 crankcase, 144 three-axis displacement sensor, 146 vibration sensor, 148 sound acquisition device, 152 crankshaft, 154 pumping unit donkey head, 156 suspension device, 158 oil production assembly, 16 pumping unit base. Detailed implementation manners

[0026] To make the objectives, embodiments and advantages of the present invention clearer, the embodiments in the accompanying drawings of the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0027] See Figures 1 to 3, the tension monitoring device provided by the present invention is used for detecting the tension of the transmission device 11. The transmission device 11 includes a first transmission wheel, a second transmission wheel and a transmission member 116. The first transmission wheel and the second transmission wheel are driven by the transmission member 116. Among them, the first transmission wheel can be the motor driving wheel 112, and the second transmission wheel can be the driven wheel 114. Optionally, the transmission device 11 further includes a driving wheel Hall switch 113 provided on the motor driving wheel 112, and the transmission device 11 further includes a driven wheel Hall switch 115 provided on the driven wheel 114. The tension monitoring device includes a first temperature sensor 132, an adjusting device 12, a judging device and a control device 135. The first temperature sensor 132 is arranged corresponding to the transmission member 116. The first temperature sensor 132 can be a non-contact sensor or a contact sensor. When the first temperature sensor 132 is a non-contact sensor, the temperature sensing probe of the first temperature sensor 132 is spaced from the transmission member 116 by a distance less than or equal to 1 cm. When the first temperature sensor 132 is a contact sensor, the temperature sensing probe of the first temperature sensor 132 contacts the transmission member 116. The first temperature sensor 132 is used to obtain the temperature on the surface of the transmission member 116; the adjusting device 12 is arranged corresponding to the transmission member 116 and can move towards the transmission member 116 and press the transmission member 116; the judging device is connected to the first temperature sensor 132 and is used to judge whether the transmission member 116 is in a target state based on the temperature on the surface of the transmission member 116; among them, the target state of the transmission member 116, that is, the transmission member 116 is in a relaxed state, can be preset. For example, the difference in the side lengths of the two sides of the transmission member 116. When the difference in the side lengths of the two sides is greater than the preset distance, it is considered that the transmission member 116 is in a relaxed state. It should be noted that if it is judged whether the transmission member 116 is in a relaxed state according to the difference in the side lengths of the two sides of the transmission member 116, the tension monitoring device further includes a distance obtaining device for obtaining the side lengths of the two sides of the transmission member 116. The control device 135 is used to control the adjusting device 12 to move towards the transmission member 116 and press the transmission member 116 when the judging device judges that the transmission member 116 is in the target state, so that the transmission member 116 is in a tensioned state; optionally, the first temperature sensor 132 includes a non-contact sensor. Optionally, the transmission member 116 is a conveyor belt. Since the transmission member 116 will slip when it is in a relaxed state, the temperature on the surface of the transmission member 116 will increase. Therefore, the present invention directly judges whether the transmission member 116 is in a relaxed state according to the temperature on the surface of the transmission member 116. In this way, compared with the rotational speed difference between the two wheels, the accuracy is higher and it is applicable to any working condition.

[0028] In some embodiments, optionally, the non-contact sensor includes an infrared thermometer or a thermal imager.

[0029] See Figure 2, in some embodiments, optionally, the adjusting device 12 includes: a driving device 122 connected to the control device 135; a pressing bearing 124 connected to the driving device 122 and the transmission member 116, and the driving device 122 can drive the pressing bearing 124 to move towards the transmission member 116 and press the transmission member 116.

[0030] In this embodiment, the adjusting device 12 includes a driving device 122 and a pressing bearing 124. The driving device 122 is connected to the control device 135; the pressing bearing 124 is connected to the driving device 122 and the transmission member 116. In this way, when it is detected that the transmission member 116 is loose, the driving device 122 can drive the pressing bearing 124 to move towards the transmission member 116 and press the transmission member 116. The method of directly pressing the transmission member adopted in the present invention is simpler in structural design than the conventional scheme of moving the transmission wheel to tension the transmission member 116. There is no need to consider how to drive the transmission wheel to move, that is, as long as there is a transmission belt, the tension monitoring device of the present invention can perform tensioning, improving the scope of application. Optionally, the driving device 122 is a servo motor. Optionally, the adjusting device 12 further includes a bearing bracket 125 and a transmission mechanism 123. The servo motor is installed on the pumping unit base 16. The servo motor is connected to the transmission mechanism 123. The transmission mechanism 123 is connected to the bearing bracket 125. The pressing bearing 124 is installed on the bearing bracket 125. The pressing bearing 124 contacts the transmission device 11 of the pumping unit 1. When the servo motor rotates after being powered on, after passing through the transmission mechanism 123, the rotational motion of the servo motor is changed into a linear motion, driving the bearing bracket 125 to perform a linear motion up and down, so as to press the transmission member 116 and achieve the purpose of adjusting the tightness of the transmission member 116.

[0031] In some embodiments, optionally, the tightness monitoring device further includes: a rain sensor 134 connected to the judging device for detecting the environmental humidity; the judging device can also jointly judge whether the transmission member 116 is in a target state based on the environmental humidity and the temperature on the surface of the transmission member 116.

[0032] In this embodiment, the tightness monitoring device further includes a rain sensor 134, which is arranged on the control device 135 and connected to the judging device for detecting the environmental humidity. The judging device can also jointly judge whether the transmission member 116 is in a target state based on the environmental humidity and the temperature on the surface of the transmission member 116. The present invention can jointly judge whether the transmission member 116 is in a target state according to the rain sensor 134 and the temperature on the surface of the transmission member 116, and has a higher accuracy rate compared with a single judgment condition.

[0033] In some embodiments, optionally, the transmission device 11 further includes a motor 118. The motor 118 is connected to one of the first transmission wheel or the second transmission wheel and is used to drive the first transmission wheel or the second transmission wheel to rotate. The tightness monitoring device further includes a detection device, which is connected to the motor 118 and the judgment device and is used to detect the current and rotational speed of the motor 118. The judgment device can jointly judge whether the transmission member 116 is in the target state based on the current and rotational speed of the motor 118 and the temperature on the surface of the transmission member 116.

[0034] In this embodiment, the tightness monitoring device further includes a detection device, which is connected to the motor 118 and the judgment device. The detection device is used to detect the current and rotational speed of the motor 118. The judgment device can jointly judge whether the transmission member 116 is in the target state based on the current and rotational speed of the motor 118 and the temperature on the surface of the transmission member 116, and has a higher accuracy rate compared with a single judgment condition. It should be noted that the tightness monitoring device of the present invention can simultaneously include a rain sensor 134 and a detection device, so that the judgment device can jointly judge whether the transmission member 116 is in the target state based on the current and rotational speed of the motor 118, the temperature on the surface of the transmission member 116, and the ambient humidity.

[0035] See Figure 3 and Figure 4 In some embodiments, optionally, the motor 118 includes a heat dissipation groove 136. The tightness monitoring device further includes a second temperature sensor 137, which is arranged in the heat dissipation groove 136 and is used to obtain the temperature of the motor 118. The judgment device is also connected to the second temperature sensor 137, and the judgment device can also jointly judge whether the transmission member 116 is in the target state based on the temperature of the motor 118 and the temperature on the surface of the transmission member 116.

[0036] In this embodiment, the motor 118 includes heat dissipation grooves 136. The tightness monitoring device further includes a second temperature sensor 137, which is disposed in the heat dissipation grooves 136 and connected to the motor 118 for obtaining the temperature of the motor 118. Optionally, the second temperature sensor 137 is a contact temperature sensor. Optionally, the first temperature sensor 132 can also be disposed in the heat dissipation grooves 136. Since the tightness monitoring device and the transmission device 11 of the present invention are both applied to the pumping unit 1, the temperature of the motor 118 can be obtained through the second temperature sensor 137, overcoming the problem that the general pumping unit 1 usually does not have a temperature detection device to detect the temperature of the motor 118, and it is impossible to accurately monitor the operating temperature of the motor 118, resulting in a failure of the motor 118. In addition, the judgment device is also connected to the second temperature sensor 137, and the judgment device can also jointly judge whether the transmission member 116 is in the target state based on the temperature of the motor 118 and the temperature on the surface of the transmission member 116. Compared with a single judgment condition, the accuracy rate is higher. It should be noted that the tightness monitoring device of the present invention can simultaneously include a rain sensor 134, a detection device, and a second temperature sensor 137, so that the judgment device can jointly judge whether the transmission member 116 is in the target state based on the current and rotation speed of the motor 118, the temperature on the surface of the transmission member 116, the ambient humidity, and the temperature of the motor 118. The present invention can dispose both the first temperature sensor 132 and the second temperature sensor 137 in the heat dissipation grooves 136 of the motor 118, use the second temperature sensor 137 to collect the temperature of the motor 118, and use the first temperature sensor 132 to collect the operating temperature of the transmission member 116 of the pumping unit 1, and both are transmitted to the control device 135 for collection.

[0037] See Figure 4 , in some embodiments, optionally, the tightness monitoring device further includes: a solar panel 138, connected to the first temperature sensor 132 and the second temperature sensor 137, for converting light energy into electrical energy and supplying power to the first temperature sensor 132 and the second temperature sensor 137; a charging protection device 139, connected to the first temperature sensor 132 and the second temperature sensor 137, for performing charging protection on the first temperature sensor 132 and the second temperature sensor 137.

[0038] In this embodiment, by providing the solar panel 138 and the charging protection device 139, the first temperature sensor 132 and the second temperature sensor 137 can be powered by the solar panel 138, and the first temperature sensor 132 and the second temperature sensor 137 can be charged and protected by the charging protection device 139. Optionally, the solar panel 138 is a strip-shaped solar power generation panel, and the charging protection device 139 is an intelligent charging protection device 139.

[0039] The second aspect of the present invention provides a pumping unit 1, comprising: a tightness monitoring device and a transmission device 11 provided in any one of the embodiments of the first aspect of the present invention.

[0040] See Figure 1 , in some embodiments, optionally, the pumping unit 1 further comprises: a crankcase 142 connected to the transmission device 11; a three-axis displacement sensor 144 provided in the crankcase 142 for detecting the tilt angle of the crankcase 142; a vibration sensor 146 provided in the crankcase 142 for detecting the vibration frequency of the crankcase 142; a sound collection device 148 provided in the crankcase 142 for collecting the sound of the pumping unit 1; the three-axis displacement sensor 144, the vibration sensor 146 and the sound collection device 148 are all connected to a judgment device, and the judgment device can further judge whether the transmission part 116 is in a target state according to at least one of the tilt angle of the crankcase 142, the vibration frequency of the crankcase 142 and the sound of the pumping unit 1.

[0041] In this embodiment, the pumping unit 1 further comprises a crankcase 142, a three-axis displacement sensor 144, a vibration sensor 146 and a sound collection device 148. The crankcase 142 is connected to the transmission device 11. The three-axis displacement sensor 144 is provided on the crankcase 142 for detecting the tilt angle of the crankcase 142. The vibration sensor 146 is provided on the crankcase 142 for detecting the vibration frequency of the crankcase 142. The sound collection device 148 is provided on the crankcase 142 for collecting the sound of the pumping unit 1. Optionally, the three-axis displacement sensor 144, the vibration sensor 146 and the sound collection device 148 are all connected to a control device 135, and the data collected by the three-axis displacement sensor 144, the vibration sensor 146 and the sound collection device 148 can all be sent to the control device 135. When the three-axis displacement sensor 144 detects that the pumping unit 1 has a displacement in the present invention, the data is transmitted to the control device 135. The control device 135 then comprehensively judges whether the pumping unit 1 has a risk of tipping over through the data transmitted by the vibration sensor 146 and the sound data of the running pumping unit 1 after noise reduction by the sound collection device 148, and transmits a warning message to the management personnel of the pumping unit 1, thus avoiding the risk of the pumping unit 1 tipping over and saving the workload of the staff. In addition, the three-axis displacement sensor 144, the vibration sensor 146 and the sound collection device 148 are all connected to a judgment device, and the judgment device can further judge whether the transmission part 116 is in a target state according to at least one of the tilt angle of the crankcase 142, the vibration frequency of the crankcase 142 and the sound of the pumping unit 1.

[0042] See Figure 1, in some embodiments, optionally, the pumping unit 1 further includes: a crankshaft 152 disposed in the crankcase 142, the crankshaft 152 being connected to the transmission device 11; a walking beam 154 of the pumping unit, connected to the crankshaft 152 and capable of reciprocating under the action of the crankshaft 152; a bridle 156 connected to the walking beam 154 of the pumping unit; a oil production assembly 158 connected to the bridle 156 and capable of extending into the oil well to produce oil;

[0043] In this embodiment, the pumping unit 1 further includes a crankshaft 152, a walking beam 154 of the pumping unit, a bridle 156, and an oil production assembly 158. The crankshaft 152 is disposed in the crankcase 142, and the crankshaft 152 is connected to the transmission device 11, and the transmission device 11 can drive the crankshaft 152 to rotate; the walking beam 154 of the pumping unit is connected to the crankshaft 152 and can reciprocate under the action of the crankshaft 152; the bridle 156 is connected to the walking beam 154 of the pumping unit; the oil production assembly 158 is connected to the bridle 156 and can extend into the oil well to produce oil under the pulling of the bridle 156; optionally, the tightness monitoring device of the present invention may simultaneously include a rain sensor 134, a detection device, a second temperature sensor 137, a three-axis displacement sensor 144, a vibration sensor 146, and a sound collection device 148, so that the judgment device can jointly judge whether the transmission member 116 is in a target state based on the current and rotation speed of the motor 118, the temperature on the surface of the transmission member 116, the environmental humidity, the temperature of the motor 118, the tilt angle of the crankcase 142, the vibration frequency of the crankcase 142, the sound of the pumping unit 1, and the oil production volume of the oil production assembly 158. Optionally, the tightness monitoring device may also simultaneously include any two or three or more of the rain sensor 134, the detection device, the second temperature sensor 137, the three-axis displacement sensor 144, the vibration sensor 146, and the sound collection device 148, so that the judgment device can jointly judge whether the transmission member 116 is in a target state based on two or three or more of the current and rotation speed of the motor 118, the temperature on the surface of the transmission member 116, the environmental humidity, the temperature of the motor 118, the tilt angle of the crankcase 142, the vibration frequency of the crankcase 142, the sound of the pumping unit 1, and the oil production volume of the oil production assembly 158.

[0044] See Figure 1 and Figure 3, the monitoring and adjustment method of the transmission device 11 of the pumping unit 1 of the present invention is specifically as follows. First, install a pulse signal sensor 119, which is used to collect the pulse signals of the motor driving wheel 112 and the driven wheel 114. Optionally, the pulse signal sensor 119 is a block structure. Among them, the motor driving wheel 112 is the above-mentioned first transmission wheel. Using the circumferences of the motor driving wheel 112 and the driven wheel 114, the control device 135 calculates the pulse ratio of the motor driving wheel 112 and the driven wheel 114. Among them, the driven wheel 114 is regarded as the above-mentioned second transmission wheel. During the operation of the motor 118, when the pulse ratio of the motor driving wheel 112 and the driven wheel 114 is within the set range, if it exceeds the set range, first analyze the data collected by the control device 135, and comprehensively judge the rain condition collected by the rain sensor 134, the changes in the current and speed of the motor 118, the changes in the three-axis displacement sensor 144, and the temperature of the transmission part 116 to determine whether the transmission part 116 is in a loose state. If it is determined that the transmission part 116 is in a loose state, an alarm program will be started in the control device 135, and at the same time, enter the tightening and loosening adjustment mode, and use the adjustment device 12 to adjust the running current of the motor 118 to finely adjust the tightness of the transmission part 116, so that the rotational speed pulse ratio of the motor driving wheel 112 and the driven wheel 114 reaches the set range.

[0045] Of course, if necessary, this patent can also use the pulse ratio of the rotational speeds of the motor driving wheel 112 and the driven wheel 114 to monitor the slippage of the transmission part 116, in which case the structure and principle are relatively simple. Or based on the pulse ratio of the rotational speeds of the motor driving wheel 112 and the driven wheel 114, the current and speed of the motor 118, the temperature on the surface of the transmission part 116, the environmental humidity, the temperature of the motor 118, the tilt angle of the crankcase 142, the vibration frequency of the crankcase 142, the sound of the pumping unit 1, and the oil production volume of the oil production assembly 158 to monitor the tightness of the transmission part 116.

[0046] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tightness monitoring device, characterized in that, For the tightness detection of a transmission device, the transmission device includes a first transmission wheel, a second transmission wheel and a transmission member, the first transmission wheel and the second transmission wheel are transmitted through the transmission member, and the tightness monitoring device includes: A first temperature sensor, arranged corresponding to the transmission member, for obtaining the temperature on the surface of the transmission member; An adjustment device, arranged corresponding to the transmission member, capable of moving towards the transmission member and pressing the transmission member; A judgment device, connected to the first temperature sensor, for judging whether the transmission member is in a target state based on the temperature on the surface of the transmission member; A control device, for controlling the adjustment device to move towards the transmission member and press the transmission member when the judgment device judges that the transmission member is in a target state, so that the transmission member is in a tension state; The first temperature sensor includes a non-contact sensor.

2. The tightness monitoring device according to claim 1, characterized in that, The non-contact sensor includes an infrared thermometer or a thermal imager.

3. The tightness monitoring device according to claim 1, characterized in that, The adjustment device includes: A driving device, connected to the control device; A pressing bearing, connected to the driving device and the transmission member, and the driving device can drive the pressing bearing to move towards the transmission member and press the transmission member.

4. The tightness monitoring device according to claim 1, characterized in that, It further includes: A rain sensor, arranged on the control device and connected to the judgment device, for detecting the environmental humidity; The judgment device can also jointly judge whether the transmission member is in a target state based on the environmental humidity and the temperature on the surface of the transmission member.

5. The tightness monitoring device according to claim 1, characterized in that, The transmission device further includes a motor, the motor is connected to one of the first transmission wheel or the second transmission wheel, for driving the first transmission wheel or the second transmission wheel to rotate, and the tightness monitoring device further includes: A detection device, connected to the motor and the judgment device, for detecting the current and rotation speed of the motor; The judgment device can jointly judge whether the transmission member is in a target state based on the current and rotation speed of the motor and the temperature on the surface of the transmission member.

6. The tightness monitoring device according to claim 5, characterized in that, The motor includes heat dissipation grooves, and the tightness monitoring device further includes: A second temperature sensor, arranged in the heat dissipation grooves, for obtaining the temperature of the motor; The judgment device is also connected to the second temperature sensor, and the judgment device can also jointly judge whether the transmission member is in a target state based on the temperature of the motor and the temperature on the surface of the transmission member.

7. The tightness monitoring device according to claim 6, characterized in that, It further includes: A solar panel, connected to the first temperature sensor and the second temperature sensor, for converting light energy into electrical energy and supplying power to the first temperature sensor and the second temperature sensor; A charging protection device, connected to the first temperature sensor and the second temperature sensor, for charging protection of the first temperature sensor and the second temperature sensor.

8. A pumping unit, characterized in that, It includes: The tightness monitoring device according to any one of claims 1 to 7; The transmission device.

9. The pumping unit according to claim 8, characterized in that, It further includes: A crankcase, connected to the transmission device; A three-axis displacement sensor, arranged on the crankcase, for detecting the tilt angle of the crankcase; A vibration sensor, arranged on the crankcase, for detecting the vibration frequency of the crankcase; A sound acquisition device is provided in the crankcase for acquiring the sound of the pumping unit. The triaxial displacement sensor, the vibration sensor, and the sound acquisition device are all connected to the judgment device, and the judgment device can also judge whether the transmission part is in the target state according to at least one of the tilt angle of the crankcase, the vibration frequency of the crankcase, and the sound of the pumping unit.

10. The pumping unit according to claim 9, characterized in that, It further includes: A crankshaft is provided in the crankcase, and the crankshaft is connected to the transmission device. The walking beam of the pumping unit is connected to the crankshaft and can make reciprocating motion under the action of the crankshaft. A polished rod clamp is connected to the walking beam of the pumping unit. An oil production assembly is connected to the polished rod clamp and can extend into the oil well for oil production.

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