Transformer oil conservator oil level measuring device

Abstract

The invention relates to the technical field of transformer oil level measurement, and discloses a transformer oil conservator oil level measuring device which comprises an insulating rod and further comprises an installation disc installed at the top end of the insulating rod, an elastically telescopic sonar probe is installed in the center of the installation disc, and the telescopic direction of the sonar probe is parallel to the axis of the installation disc; and the monitoring instrument is arranged on the insulating rod and is used for monitoring and displaying the signal received by the sonar probe. The sonar probe can be tightly attached to the bottom of the oil conservator through the arrangement that the sonar probe can elastically stretch out and draw back, and the sonar probe can be prevented from deviating or fluctuating due to the influence of manual operation in the working process in cooperation with stable adsorption and fixation of the mounting disc; the situation that the sensor probe is not stable enough when transmitting or receiving the reflected waves, and consequently transmitting and receiving paths of the sound waves are changed is prevented, and the measurement precision is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer oil level measurement, in particular to a transformer oil conservator oil level measuring device. Background Art

[0002] Transformer oil is an important component of the transformer, and plays an important role in insulation and cooling. Whether the amount of oil in the transformer tank is sufficient and the oil level greatly affect the safe operation of the transformer; if the oil level is too high, the transformer oil may overflow. If it is a fully sealed system, it may also increase the pressure in the tank. Long-term pressure may cause equipment damage. If the oil level is too low, it may cause gas protection to operate, and it may also expose the transformer lead wire to the air, reducing the insulation strength, which may cause flash discharge and have a great impact on the insulation strength of the transformer oil itself. Therefore, it is necessary to measure the oil level in the transformer.

[0003] At present, the oil level gauges of oil pillows can be mainly divided into the following types: buoyancy principle oil level gauge, connectivity principle oil level gauge, magnetic principle oil level gauge, capacitance principle oil level gauge and ultrasonic oil level gauge, among which ultrasonic oil level gauges mostly adopt non-contact measurement technology. When measuring, the sonar sensor can be manually pressed against the bottom of the oil pillow, realizing non-contact measurement of the oil level in the closed container without opening the can. It has the characteristics of measurement on use, convenience, speed, safety and reliability.

[0004] However, this non-contact measurement method still has the following problems in actual use. When the sonar sensor is manually placed against the bottom of the oil pillow, it cannot be stably fixed at the bottom of the oil pillow. Although it can be used and measured at any time, the sensor probe is easily affected by manual operation and may be offset or fluctuated during operation. This may cause the sensor probe to be unstable when transmitting or receiving reflected waves, resulting in changes in the emission and reception paths of the sound waves, thereby affecting the measurement accuracy. Summary of the invention

[0005] The purpose of the present invention is to provide a transformer oil conservator oil level measuring device to solve the technical problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: a transformer oil conservator oil level measuring device, comprising an insulating rod, and further comprising: A mounting plate is mounted on the top of the insulating rod, wherein a sonar probe capable of elastic expansion and contraction is mounted at the center of the mounting plate, and the expansion and contraction direction of the sonar probe is arranged parallel to the axis of the mounting plate; A monitoring instrument installed on the insulating rod, and the monitoring instrument is used to monitor and display the signal received by the sonar probe; A plurality of adsorption parts are distributed in a ring shape around the sonar probe and are arranged on the adsorption part of the mounting plate, and the adsorption part can be adsorbed and fixed on the bottom of the oil pillow; The monitoring part is used to monitor the horizontality of the mounting plate so that the mounting plate can maintain a horizontal state when it is adsorbed and fixed on the bottom of the oil pillow.

[0007] Preferably, the adsorption portion includes a through hole opened at a position away from the center of the mounting plate, the axis of the through hole is arranged parallel to the axis of the mounting plate, and a fixing cylinder is fixed in the through hole, the top of the fixing cylinder is connected to a suction cup, the interior of the suction cup is connected to the interior of the fixing cylinder, an annular groove is opened on the inner wall of the fixing cylinder near the bottom end, and a closing ball that can rotate arbitrarily is installed in the annular groove, and the closing ball closes the bottom end of the fixing cylinder; A micro air pump is installed at the bottom end of the insulating rod. The micro air pump is connected to the interior of each fixed cylinder through an air pipe. The micro air pump draws air from the suction cup through the air pipe and the fixed cylinder.

[0008] Preferably, the monitoring part is provided with multiple groups, the multiple groups of monitoring parts correspond to the multiple adsorption parts, and the multiple groups of monitoring parts are respectively installed in each of the fixed cylinders, the monitoring part includes a counterweight ball fixed to the outer wall of the closing ball by a connecting rod, the counterweight ball is located below the closing ball, and the centers of the closing ball and the counterweight ball are both located on the extension line of the connecting rod, the inner wall of the fixed cylinder is provided with a plurality of connecting holes distributed in a ring shape, the upper ends of the connecting holes are connected with the interior of the fixed cylinder, and the lower ends of the connecting holes are both located on the horizontal diameter line of the closing ball, the interior of the closing ball on both sides of the horizontal diameter line is provided with leakage channels, each connecting hole corresponds to the position of two leakage channels on both sides of the horizontal diameter line, and the air outlet of the leakage channel is connected to the outer wall below the closing ball, when the closing ball is in a vertical state and parallel to the axis of the fixed cylinder, the lower end of the connecting hole is located between the air inlets of the two leakage channels, and the outer wall of the closing ball closes the lower end of the connecting hole.

[0009] Preferably, a spherical cavity is provided at the bottom of the center of the mounting plate, and a rotatable connecting ball is embedded and installed in the spherical cavity, a connecting piece is fixed below the connecting ball, a connecting bolt is integrally formed at the bottom of the connecting piece, and a screw hole that can cooperate with the connecting bolt is provided at the top of the insulating rod; A locking structure is also installed in the installation disk, and when the installation disk is kept horizontal and the adsorption portion is in an adsorbed and fixed state, the locking structure locks the connecting ball and restricts its rotation.

[0010] Preferably, the locking structure comprises a built-in cavity opened in the spherical cavity inside the mounting plate, a limiting ring is slidably installed on the inner wall of the built-in cavity along the axial direction, the connecting ball is located in the inner ring of the limiting ring, the inner ring diameter of the limiting ring is smaller than the diameter of the connecting ball, and the limiting ring is located below the horizontal diameter line of the connecting ball, an elastic member is installed between the limiting ring and the inner bottom of the built-in cavity, and the elastic member is used to push the limiting ring to press the connecting ball upward; The locking structure also includes a pressure-applying portion, and the pressure-applying portion can apply downward pressure to the limiting ring or release the pressure on the limiting ring.

[0011] Preferably, the pressure-applying part is provided with a plurality of groups in an annular shape, and the plurality of pressure-applying parts correspond to the fixed cylinders one by one, the pressure-applying part comprises a closed cavity provided in an eccentric position inside the mounting plate, a piston part is vertically slidably installed inside the closed cavity, a push rod is integrally formed at the bottom end of the piston part, and the push rod extends into the built-in cavity and contacts and abuts against a limit ring, a compression spring is connected between the piston part and the inner top of the closed cavity, and the compression spring pushes the piston part to press down the limit ring, so that the limit ring is separated from the connecting ball; A through hole is provided in the center of the connecting ball along the diameter direction for the air pipe to pass through, and the air pipe is connected to a branch pipe after passing through the through hole. The branch port of the branch pipe is connected to the closed cavity, and the closed cavity is also connected to the inside of the corresponding fixed cylinder through the branch pipe.

[0012] Preferably, a mounting tube is coaxially fixed to the top of the center of the mounting plate, a telescopic part is slidably installed inside the mounting tube along the axial direction, a spring is installed between the telescopic part and the inner bottom surface of the mounting tube, and the sonar probe is embedded in the top of the telescopic part.

[0013] Preferably, the depth of the screw hole at the top end of the insulating rod is greater than the length of the connecting bolt, and a telescopic section of the gas pipe is reserved in the screw hole.

[0014] Preferably, the screw hole entrance at the top end of the insulating rod is configured as an expanded hole, and the inner wall of the expanded hole is designed to be smooth.

[0015] Preferably, the top plane of the suction cup is lower than the top plane of the sonar probe.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can make the sonar probe fit tightly with the bottom of the oil pillow through the elastic expansion and contraction setting, and with the stable adsorption and fixation of the mounting plate, it can prevent the sonar probe from being affected by manual operation during operation and causing deviation or fluctuation, and prevent the sensor probe from being unstable when transmitting or receiving reflected waves, which causes changes in the transmission and reception paths of the sound waves, thereby further improving the measurement accuracy; Second, the present invention can directly determine whether the mounting plate is in a horizontal state by whether the mounting plate can be adsorbed and fixed, thereby achieving the purpose of monitoring and further ensuring the accuracy of measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional Figure 1 ; Figure 2 The three-dimensional Figure 2 ; Figure 3 is a side sectional view of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of the middle mounting plate and the structure thereon; Figure 5 For the present invention Figure 3 Cutaway stereogram of perspective; Figure 6 For the present invention Figure 5 A partially cutaway stereogram of a Figure 7 For the present invention Figure 6 Enlarged view of point A in .

[0018] In the figure: 1. Insulating rod; 2. Monitoring instrument; 3. Mounting plate; 4. Mounting tube; 5. Telescopic part; 6. Sonar probe; 7. Fixing tube; 8. Suction cup; 9. Connecting piece; 10. Connecting bolt; 11. Air pipe; 12. Connecting ball; 13. Closing ball; 14. Leakage channel; 15. Connecting hole; 16. Counterweight ball; 17. Diverter pipe; 18. Closing chamber; 19. Diverter pipe; 20. Piston part; 21. Compression spring; 22. Built-in chamber; 23. Limiting ring; 24. Elastic part; 25. Micro air pump. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0020] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] Unless otherwise defined, all technical and scientific terms used in the specification of the present invention have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any and all combinations of one or more related listed items.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figures 1 to 7 The present invention provides a technical solution: a transformer oil conservator oil level measuring device, comprising an insulating rod 1, and also comprising: A mounting plate 3 is mounted on the top of the insulating rod 1, and a sonar probe 6 that can be elastically retracted is mounted at the center of the mounting plate 3, and the retracting direction of the sonar probe 6 is parallel to the axis of the mounting plate 3; A monitoring instrument 2 is installed on the insulating rod 1, and the monitoring instrument 2 is used to monitor and display the signal received by the sonar probe 6; the signal connection between the monitoring instrument 2 and the sonar probe 6 can be achieved through a wired connection or a wireless connection in the prior art, and this application does not make any specific limitations on this.

[0025] A plurality of adsorption parts are distributed in a ring shape around the sonar probe 6 and are arranged on the adsorption part of the mounting plate 3, and the adsorption part can be adsorbed and fixed on the bottom of the oil pillow; The monitoring part is used to monitor the horizontality of the mounting plate 3 so that the mounting plate 3 can maintain a horizontal state when being adsorbed and fixed on the bottom of the oil pillow.

[0026] When the oil level measuring device is in use, a worker holds the insulating rod 1 and brings the mounting plate at the top thereof close to the bottom of the transformer oil pillow. The mounting plate 3 is then fixed to the bottom of the oil pillow by the adsorption portion. During the adsorption and fixing process, the monitoring portion monitors the horizontality of the mounting plate 3 to ensure that the mounting plate 3 is in a horizontal state when it is adsorbed and fixed to the bottom of the oil pillow, because the horizontality of the mounting plate 3 will affect the contact position between the sonar probe 6 and the bottom of the oil pillow. In order to improve the measurement accuracy, the sonar probe 6 is arranged perpendicular to the liquid surface so that the data signal obtained is relatively stable and accurate. Therefore, whether the mounting plate 3 is horizontal is directly and importantly related to the accuracy of the detection result.

[0027] The bottom of the oil pillow may be an arc surface or a plane surface. If it is a plane surface, the impact on the horizontality of the mounting plate 3 is minimal. If it is an arc surface, the monitoring part can monitor the installation of the mounting plate 3 to ensure that the mounting plate 3 remains horizontal after being adsorbed and fixed.

[0028] After the mounting plate 3 is adsorbed and fixed, the sonar probe 6 transmits and receives sonar signals. Specifically, the sonar wave signal is transmitted from the probe, and the echo signal is detected by the probe after being reflected by the oil surface. The time t is calculated after being processed by a proprietary algorithm. The system calculates the oil level height according to the echo time and the medium sound velocity, thereby completing the measurement of the oil level height in the oil pillow. The technology of using sonar signals to realize oil level measurement can be realized by any technology in the prior art, and the present application does not make any specific limitation on this.

[0029] It is worth mentioning that the elastically retractable setting of the sonar probe 6 allows it to fit tightly against the bottom of the oil pillow. Combined with the stable adsorption and fixation of the mounting plate 3, it can prevent the sonar probe 6 from being affected by manual operation during operation and causing deviation or fluctuation, and prevent the sensor probe from being unstable when transmitting or receiving reflected waves, which causes changes in the emission and receiving paths of the sound waves, thereby further improving the measurement accuracy.

[0030] In one of the more preferred embodiments, an implementation of an adsorption portion is provided; The adsorption part includes a through hole provided at a position away from the center of the mounting plate 3, the axis of the through hole is arranged parallel to the axis of the mounting plate 3, and a fixing cylinder 7 is fixed in the through hole, a suction cup 8 is connected to the top of the fixing cylinder 7, the interior of the suction cup 8 is communicated with the interior of the fixing cylinder 7, an annular groove is provided on the inner wall of the fixing cylinder 7 near the bottom end, and a closing ball 13 which can rotate arbitrarily is installed in the annular groove, and the closing ball 13 closes the bottom end of the fixing cylinder 7; A micro air pump 25 is installed at the bottom end of the insulating rod 1. The micro air pump 25 is connected to the interior of each fixed tube 7 through the air supply pipe 11. The micro air pump 25 evacuates air from the suction cup (8) through the air supply pipe 11 and the fixed tube 7.

[0031] For details, please refer to Figure 3 When the mounting plate 3 is close to the bottom of the oil pillow, the suction cup 8 will fit with it, and then the micro air pump 25 at the bottom of the insulating rod 1 is controlled to evacuate air, and the air in each fixing tube 7 is evacuated through the air pipe 11, so that negative pressure is generated in the suction cup 8 and the mounting plate 3 is adsorbed and fixed to the bottom of the oil pillow, thereby completing the temporary fixing process of the mounting plate 3; On the contrary, the micro air pump 25 can blow air in the reverse direction to release the adsorption effect of the suction cup 8, so that the mounting plate 3 can be separated from the bottom of the oil pillow.

[0032] In one of the more preferred embodiments, an implementation of a monitoring unit is provided; The monitoring part is provided with multiple groups, and the multiple groups of monitoring parts correspond to the positions of the multiple adsorption parts, and the multiple groups of monitoring parts are respectively installed in each fixed cylinder 7. The monitoring part includes a weight ball 16 fixed to the outer wall of the closed ball 13 through a connecting rod. The weight ball 16 is located at the closed ball 13. Below, the centers of the closing ball 13 and the weighted ball 16 are both located on the extension line of the connecting rod. The inner wall of the fixed cylinder 7 is provided with a plurality of connecting holes 15 distributed in an annular shape. The upper ends of the connecting holes 15 are connected to the interior of the fixed cylinder 7, and the lower ends of the connecting holes 15 are both located on the horizontal diameter line of the closing ball 13. The interior of the closing ball 13 on both sides above and below the horizontal diameter line is provided with leakage channels 14. Each connecting hole 15 corresponds to the position of the two leakage channels 14 on both sides above and below the horizontal diameter line, and the air outlet of the leakage channel 14 is connected to the outer wall below the closing ball 13. When the closing ball 13 is in a vertical state and parallel to the axis of the fixed cylinder 7, the lower end of the connecting hole 15 is located between the air inlets of the two leakage channels 14. The outer wall of the closing ball 13 closes the lower end of the connecting hole (15), that is, the lower end of the connecting hole 15 is closed by the closing ball 13.

[0033] For details, please refer to Figure 4 and Figure 6 When the suction cup 8 on the mounting plate 3 contacts the bottom of the oil pillow, if the mounting plate 3 is in a horizontal state, the closing ball 13 and the weight ball 16 are in a vertical state and parallel to the axis of the fixed cylinder 7. At this time, the closing ball 13 will close the connecting hole 15 in the fixed cylinder 7, so that the bottom end of the fixed cylinder 7 can be kept in a sealed state, and then the mounting plate 3 can be fixed to the bottom of the oil pillow by suction through the micro air pump 25; When the mounting plate 3 is in an inclined state, due to the counterweight ball 16, the closing ball 13 and the counterweight ball 16 are still in a vertical state, but the axis thereof and the fixed cylinder 7 are changed into a crossed state, and at this time the closing ball 13 rotates relative to the fixed cylinder 7, so that the air leakage channel 14 on the closing ball 13 is connected with the connecting hole 15 in the fixed cylinder 7, and then the fixed cylinder 7 is connected with the outside, so that when the micro air pump 25 evacuates the fixed cylinder 7, no negative pressure can be generated in the fixed cylinder 7, that is, the mounting plate 3 cannot be adsorbed and fixed; In this way, whether the mounting plate 3 can be adsorbed and fixed can be directly judged whether the mounting plate 3 is in a horizontal state, thereby achieving the purpose of monitoring.

[0034] Those skilled in the art should know that the present application can also be implemented by using other existing monitoring means in the prior art, but the above preferred monitoring part implementation method can not only quickly determine whether it is in a horizontal state by naked eyes, but also does not require consumption of electric energy, compared with other prior art means. At the same time, the structural and functional coordination between the monitoring part and the adsorption part is the key technical means for the present application to solve further technical problems.

[0035] In one of the more preferred embodiments, a spherical cavity is provided at the bottom of the center of the mounting plate 3, and a rotatable connecting ball 12 is embedded and installed in the spherical cavity, a connecting member 9 is fixed below the connecting ball 12, a connecting bolt 10 is integrally formed at the bottom of the connecting member 9, and a screw hole that can cooperate with the connecting bolt 10 is provided at the top of the insulating rod 1; A locking structure is also installed in the mounting plate 3 , and when the mounting plate 3 is kept in a horizontal state and the adsorption portion is in an adsorbed and fixed state, the locking structure locks the connecting ball 12 and restricts its rotation.

[0036] When the mounting plate 3 is adjusted in position and angle at the bottom of the oil pillow, the locking structure will release the lock on the connecting ball 12. At this time, the mounting plate 3, the connecting piece 9 and the insulating rod 1 are equivalent to being in a ball-hinged connection mode, so that the mounting plate 3 can be adjusted in any direction, so as to facilitate its adjustment for the bottom surface of the oil pillow with different shapes; When the mounting plate 3 is fixed by adsorption, the locking structure locks the connecting ball 12 and restricts its rotation. At this time, the insulating rod 1 can be rotated to disengage it from the connecting bolt 10, thereby disengaging the insulating rod 1 and the mounting plate 3. This can prevent the insulating rod 1 from affecting the mounting plate 3 during manual operation. In this way, the insulating rod 1 can be removed after the mounting plate 3 is fixed by adsorption. The two are only softly connected through the air pipe 11. At the same time, it also does not need to be lifted for a long time by the staff, thereby reducing the work intensity.

[0037] After the test is completed, the insulating rod 1 can be reconnected to the connecting bolt 10, and then the suction of the suction cup 8 can be released to remove the mounting plate 3.

[0038] It is worth noting that when the insulating rod 1 is rotated to disengage it from the connecting bolt 10, the friction between the insulating rod 1 and the connecting bolt 10 is relatively large in the initial state. Therefore, the insulating rod 1 will also exert a twisting effect on the mounting plate 3 when it rotates. If the twisting force releases the adsorption force of the suction cup 8 at this time, it means that the adsorption effect of the suction cup 8 does not meet the predetermined adsorption force size, that is, the adsorption of the mounting plate 3 is not stable enough, and its horizontality is difficult to ensure for a long time. Then, the above-mentioned adjustment can be performed again before adsorption. In this way, the mounting plate 3 can be further tested by disengaging the insulating rod 1, thereby ensuring that the mounting plate 3 can maintain a stable horizontal state after installation to ensure accurate measurement of the sonar probe 6.

[0039] In one of the more preferred embodiments, a locking structure implementation is provided; The locking structure includes a built-in cavity 22 opened in the spherical cavity inside the mounting plate 3, a limit ring 23 is slidably installed on the inner wall of the built-in cavity 22 along its axial direction, the connecting ball 12 is located in the inner ring of the limit ring 23, the inner ring diameter of the limit ring 23 is smaller than the diameter of the connecting ball 12, and the limit ring 23 is located below the horizontal diameter line of the connecting ball 12, an elastic member 24 is installed between the limit ring 23 and the inner bottom of the built-in cavity 22, and the elastic member 24 is used to push the limit ring 23 to press the connecting ball 12 upward; The locking structure further includes a pressure applying portion, and the pressure applying portion can apply downward pressure to the limiting ring 23 or release the pressure on the limiting ring 23 .

[0040] See also Figure 6 and Figure 7 In the unlocked state, the pressure applying portion will continue to apply downward pressure to the limiting ring 23, so that the inner ring of the limiting ring 23 and the connecting ball 12 do not contact each other, thereby allowing the connecting ball 12 to rotate in any direction; In the locked state, the pressure applying part releases the downward pressure applied to the limit ring 23, and the limit ring 23 moves upward under the elastic force of the elastic member 24 below, so that the inner ring and the connecting ball 12 contact and rub against each other, thereby limiting the connecting ball 12 and completing the locking thereof; It is worth noting that the inner ring of the limiting ring 23 can be designed to have a rough surface to increase the friction between it and the connecting ball 12 .

[0041] In one of the more preferred embodiments, an implementation of a pressure applying portion is provided; The pressure-applying part is provided with multiple groups in an annular shape, and the multiple groups of pressure-applying parts correspond to the fixed cylinder 7 one by one. The pressure-applying part includes a closed cavity 18 opened in an eccentric position inside the mounting plate 3, and a piston part 20 is vertically slidably installed inside the closed cavity 18. A push rod is integrally formed at the bottom end of the piston part 20, and the push rod extends into the built-in cavity 22 and contacts and abuts against a limit ring 23. A compression spring 21 is connected between the piston part 20 and the inner top of the closed cavity 18. In the unlocked state, the compression spring 21 pushes the piston part to press down the limit ring 23, so that the limit ring 23 is separated from the connecting ball 12; A through hole is opened in the center of the connecting ball 12 along the diameter direction for the air pipe 11 to pass through, and the air pipe 11 is connected to a branch pipe 19 after passing through the through hole. The branch port of the branch pipe 19 is connected to the closed cavity 18, and the closed cavity 18 is also connected to the corresponding fixed cylinder 7 through the branch pipe 17.

[0042] See also Figure 6 and Figure 7 In the unlocked state, the piston part 20 is pressed down by the elastic force of the compression spring 21, and the push rod thereon applies downward pressure to the limit ring 23, so that the limit ring 23 and the connecting ball 12 are in a separated state; When locking, as can be seen from the previous content, when the mounting plate 3 is adjusted to a suitable position and the air is evacuated from the suction cup 8 through the air pipe 11 by the micro air pump 25, as the air pressure in the suction cup 8 decreases, the air pressure in the closed cavity 18 will also decrease accordingly. Under the action of the air pressure, the piston portion 20 will overcome the elastic force of the compression spring 21, thereby causing it to move upward and break away from the contact with the limiting ring 23, thereby releasing the pressure on the limiting ring 23, and allowing the limiting ring 23 to contact the connecting ball 12, thereby completing the locking process.

[0043] It is worth noting that the elastic force of the compression spring 21 is greater than the elastic force of the elastic member 24, so that each suction cup 8 needs to be kept in a sealed state and a negative pressure state, so that the corresponding piston part 20 can be separated from the limiting ring 23. If one of the suction cups 8 is not in a sealed state, the limiting ring 23 cannot contact the connecting ball 12, and the locking function cannot be achieved. In this way, the adsorption state of the suction cup 8 and the stability of the mounting plate 3 can be evaluated by whether the connecting ball 12 is locked, so as to determine whether it is in the expected state, providing a basis for the accuracy of subsequent detection results.

[0044] In one of the more preferred embodiments, a mounting tube 4 is coaxially fixed to the top of the center of the mounting plate 3, a telescopic portion 5 is slidably installed inside the mounting tube 4 along the axial direction, and a spring is installed between the telescopic portion 5 and the inner bottom surface of the mounting tube 4, the spring is telescoped along the axial direction of the mounting tube 4, and the sonar probe 6 is embedded and installed at the top of the telescopic portion 5.

[0045] The top plane of the suction cup 8 is lower than the top plane of the sonar probe 6 .

[0046] See also Figure 4 and Figure 5 Through the design of the spring and the telescopic part 5, the sonar probe 6 can be closely fitted to the bottom of the oil pillow, thereby ensuring the accuracy of its measurement.

[0047] In one of the more preferred embodiments, the depth of the screw hole at the top end of the insulating rod 1 is greater than the length of the connecting bolt 10, and a telescopic section of the gas pipe 11 is reserved in the screw hole.

[0048] The screw hole entrance at the top end of the insulating rod 1 is set as an expanded hole, and the inner wall of the expanded hole is designed to be smooth.

[0049] See also Figure 5 Since the insulating rod 1 needs to be separated from the connecting piece 9, a certain length of the gas pipe 11 needs to be reserved to achieve a soft connection between the two, and the expansion hole design can make it more convenient for the insulating rod 1 to be connected to the connecting bolt 10 again.

[0050] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the concept of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A transformer oil conservator oil level measuring device, comprising an insulating rod (1), characterized in that: Also includes: A mounting plate (3) mounted on the top of the insulating rod (1), wherein a sonar probe (6) capable of elastic expansion and contraction is mounted at the center of the mounting plate (3), and the expansion and contraction direction of the sonar probe (6) is arranged parallel to the axis of the mounting plate (3); A plurality of adsorption portions are distributed in an annular shape around the sonar probe (6) and are arranged on the mounting plate (3), and the adsorption portions can be adsorbed and fixed on the bottom of the oil pillow; The monitoring part is used to monitor the horizontality of the mounting plate (3) so that the mounting plate (3) can maintain a horizontal state when being adsorbed and fixed on the bottom of the oil pillow.

2. The transformer oil conservator oil level measuring device according to claim 1, characterized in that: The adsorption portion comprises a through hole formed at a position of the mounting plate (3) away from the center of the circle, the axis of the through hole being arranged parallel to the axis of the mounting plate (3), and a fixing cylinder (7) being fixed in the through hole, the top end of the fixing cylinder (7) being connected to a suction cup (8), the interior of the suction cup (8) being communicated with the interior of the fixing cylinder (7), an annular groove being formed on the inner wall of the fixing cylinder (7) near the bottom end, and a sealing ball (13) being installed in the annular groove and capable of rotating arbitrarily, and the sealing ball (13) sealing the bottom end of the fixing cylinder (7); A micro air pump (25) is installed at the bottom end of the insulating rod (1), and the micro air pump (25) is connected to the interior of each fixed cylinder (7) through an air supply pipe (11). The micro air pump (25) extracts air from the suction cup (8) through the air supply pipe (11) and the fixed cylinder (7).

3. The transformer oil conservator oil level measuring device according to claim 2 is characterized in that: The monitoring part is provided with a plurality of groups, the plurality of groups of monitoring parts corresponding to the plurality of adsorption parts, and the plurality of groups of monitoring parts are respectively installed in each of the fixed cylinders (7), the monitoring part comprises a counterweight ball (16) fixed to the outer wall of the closed ball (13) by a connecting rod, the counterweight ball (16) is located below the closed ball (13), and the centers of the closed ball (13) and the counterweight ball (16) are both located on the extension line of the connecting rod, the inner wall of the fixed cylinder (7) is provided with a plurality of communicating holes (15) distributed in an annular shape, the upper ends of the communicating holes (15) are connected to the interior of the fixed cylinder (7), and the lower ends of the communicating holes (15) are both located at the closed ball (13). On a horizontal diameter line, the closing ball (13) is provided with leakage channels (14) on both sides above and below the horizontal diameter line, each communication hole (15) corresponds to the position of the two leakage channels (14) on both sides above and below the horizontal diameter line, and the air outlet of the leakage channel (14) is communicated with the outer wall below the closing ball (13), and when the closing ball (13) is in a vertical state and parallel to the axis of the fixed cylinder (7), the lower end of the communication hole (15) is located between the air inlets of the two leakage channels (14), and the outer wall of the closing ball (13) closes the lower end of the communication hole (15).

4. The transformer oil conservator oil level measuring device according to claim 1, characterized in that: A spherical cavity is provided at the bottom of the center of the mounting plate (3), and a rotatable connecting ball (12) is embedded and installed in the spherical cavity, a connecting piece (9) is fixed below the connecting ball (12), a connecting bolt (10) is integrally formed at the bottom of the connecting piece (9), and a screw hole capable of matching with the connecting bolt (10) is provided at the top of the insulating rod (1); A locking structure is also installed in the mounting plate (3), and when the mounting plate (3) is kept horizontal and the adsorption portion is in an adsorbed and fixed state, the locking structure locks the connecting ball (12) and restricts its rotation.

5. The transformer oil conservator oil level measuring device according to claim 4, characterized in that: The locking structure comprises a built-in cavity (22) provided in a spherical cavity inside the mounting plate (3); a limit ring (23) is slidably mounted on the inner wall of the built-in cavity (22) along the axial direction; the connecting ball (12) is located in the inner ring of the limit ring (23); the inner ring diameter of the limit ring (23) is smaller than the diameter of the connecting ball (12); and the limit ring (23) is located below the horizontal diameter line of the connecting ball (12); an elastic member (24) is mounted between the limit ring (23) and the inner bottom of the built-in cavity (22); and the elastic member (24) is used to push the limit ring (23) to press the connecting ball (12) upwards; The locking structure further comprises a pressure-applying portion, and the pressure-applying portion can apply downward pressure to the limiting ring (23) or release the pressure on the limiting ring (23).

6. The transformer oil conservator oil level measuring device according to claim 5, characterized in that: The pressure-applying parts are provided in a ring shape in a plurality of groups, and the plurality of pressure-applying parts correspond to the fixed cylinder (7) in a one-to-one manner. The pressure-applying parts include a closed cavity (18) opened in an eccentric position inside the mounting plate (3), a piston part (20) is vertically slidably installed inside the closed cavity (18), a push rod is integrally formed at the bottom end of the piston part (20), and the push rod extends into the built-in cavity (22) and contacts and abuts against a limit ring (23), a compression spring (21) is connected between the piston part (20) and the inner top of the closed cavity (18), and the compression spring (21) pushes the piston part to press down the limit ring (23) so that the limit ring (23) is separated from the connecting ball (12); The center of the connecting ball (12) is provided with a through hole along the diameter direction for the gas delivery pipe (11) to pass through, and the gas delivery pipe (11) is connected to a branch pipe (19) after passing through the through hole, and the branch port of the branch pipe (19) is connected to the closed cavity (18), and the closed cavity (18) is also connected to the inside of the corresponding fixed cylinder (7) through the branch pipe (17).

7. The transformer oil conservator oil level measuring device according to any one of claims 1 to 6, characterized in that: A mounting tube (4) is coaxially fixed to the top of the center of the mounting plate (3); a telescopic portion (5) is slidably mounted inside the mounting tube (4) along the axial direction; a spring is mounted between the telescopic portion (5) and the inner bottom surface of the mounting tube (4); and the sonar probe (6) is embedded and mounted on the top of the telescopic portion (5).

8. The transformer oil conservator oil level measuring device according to claim 4, characterized in that: The depth of the screw hole at the top end of the insulating rod (1) is greater than the length of the connecting bolt (10); the entrance of the screw hole at the top end of the insulating rod (1) is configured as an expanded hole, and the inner wall of the expanded hole is designed to be smooth.

9. The transformer oil conservator oil level measuring device according to claim 1, characterized in that: It also includes a monitoring instrument (2) mounted on the insulating rod (1), and the monitoring instrument (2) is used to monitor and display the signal received by the sonar probe (6).

10. The transformer oil conservator oil level measuring device according to claim 2, characterized in that: The top plane of the suction cup (8) is lower than the top plane of the sonar probe (6).

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