A screwing device for transformer oil valves

Abstract

This invention relates to a screwing device for a transformer oil valve, comprising a mounting base, a valve cover screwing mechanism, and a valve core screwing mechanism. The mounting base is used to install on the end of the robotic arm of an oil extraction robot. Both the valve cover screwing mechanism and the valve core screwing mechanism are mounted on the mounting base and are respectively connected to a rotary drive mechanism. The valve cover screwing mechanism is used to connect to the valve cover of the transformer oil valve for screwing, and the valve core screwing mechanism is used to connect to the valve core of the transformer oil valve for screwing. The screwing device for a transformer oil valve provided by this invention can be installed on the end of a robot's robotic arm, allowing the robot to operate it to automatically screw the valve cover and valve core of the transformer oil valve, thereby reducing the intensity and risk of manual labor and improving subsequent oil extraction efficiency.

Description

Technical Field

[0001] This invention relates to the field of transformer testing technology, and more specifically, to a screwing device for transformer oil valves. Background Technology

[0002] In routine maintenance of transformer equipment, regular oil sampling for oiling tests is required. Traditional manual live-line oil sampling is labor-intensive, carries high safety risks, operates in harsh environments, is easily affected by weather conditions, and involves high-altitude, high-risk, and high-intensity work. While the advent of insulated bucket trucks for live-line oil sampling has reduced risks such as electric shock and falls from heights, tool performance and the working environment still significantly impact personnel and equipment safety. Therefore, the field of live-line work needs to develop new intelligent and automated operating methods to ensure worker safety in high-risk scenarios.

[0003] Live-line work using insulated bucket trucks has undergone different development stages. The first stage was the direct operation stage: this stage required high physical fitness and skill levels from the electrician. The electrician had to wear insulated protective gear and operate the insulated bucket truck to the high-altitude working position from inside the work bucket, performing the work directly by hand. Due to the high-altitude, high-voltage working environment, even slight negligence or insufficient insulation could lead to falls from heights, electric shocks, and other safety accidents. The second stage was the remote-controlled robotic arm stage: the electrician and the robotic arm system were both inside the work bucket. The electrician operated the insulated bucket truck to the high-altitude working position and transmitted the work intentions to the robotic arm (hand) through a mechanical handle, replacing manual labor. In this method, the electrician was still at a high altitude, the system had a low level of automation, was susceptible to environmental interference, and also posed a risk of falls from heights. Furthermore, manually turning transformer oil valves required rigorous technical training and strict adherence to operating procedures. Manually turning the valves at their designated locations on the transformer resulted in high labor intensity and a low safety factor. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a screwing device for transformer oil valves to solve the technical problems existing in the prior art.

[0005] This invention provides a screwing device for a transformer oil valve, comprising a mounting base, a valve cover screwing mechanism, and a valve core screwing mechanism; wherein,

[0006] The mounting base is used to install on the end of the robotic arm of the oil extraction robot;

[0007] Both the valve cover screwing mechanism and the valve core screwing mechanism are mounted on the mounting base, and each of the valve cover screwing mechanism and the valve core screwing mechanism is connected to a rotary drive mechanism.

[0008] The valve cover screwing mechanism is used to connect with the valve cover of the transformer oil valve to perform a screwing operation, and the valve core screwing mechanism is used to connect with the valve core of the transformer oil valve to perform a screwing operation.

[0009] Preferably, the mounting base is a hollow box, and the valve cover screwing mechanism and the valve core screwing mechanism are staggered at a preset angle on the mounting base.

[0010] Preferably, the valve cover screwing mechanism includes a first rotary connecting shaft, a first telescopic rotating rod, and a first connecting member; wherein,

[0011] The mounting base is provided with a first connecting shaft sleeve and a first rotating rod sleeve, and the first connecting shaft sleeve and the first rotating rod sleeve are coaxially arranged.

[0012] The first rotating connecting shaft is rotatably mounted on the first connecting shaft sleeve, the first telescopic rotating rod is rotatably mounted on the first rotating rod sleeve, the first end of the first telescopic rotating rod is connected to the first rotating connecting shaft, and the second end of the first telescopic rotating rod extends out of the first rotating rod sleeve;

[0013] The first connector is connected to the second end of the first telescopic rotating rod, and the first connector has a first snap-fit ​​hole that matches the snap-fit ​​connector on the valve cover.

[0014] Preferably, the first rotary connecting shaft has a first sliding hole at one end facing the interior of the mounting base, and the cross-section of the first sliding hole is non-circular.

[0015] The first telescopic rotating rod includes a connector, a first sliding shaft, and a first rotating transmission rod connected in sequence. The connector is located outside the first rotating rod bushing. The first sliding shaft is slidably and rotatably connected in the first rotating rod bushing. The cross-section of the first rotating transmission rod matches the cross-section of the first sliding hole. One end of the first rotating transmission rod away from the first sliding shaft is slidably disposed in the first sliding hole.

[0016] A first spring is sleeved on the outside of the first rotary transmission rod, and the two ends of the first spring are respectively connected to the first rotary connecting shaft and the first sliding shaft.

[0017] Preferably, the connector is provided with a valve cover screw housing, which is a cylindrical structure and is coaxially arranged with the first telescopic rotating rod;

[0018] A rubber pad is provided on the inner peripheral wall of the valve cover screw housing.

[0019] Preferably, the valve core tightening mechanism includes a second rotary connecting shaft, a second telescopic rotary rod, a second connecting member, and a valve core tightening housing; wherein,

[0020] The mounting base is provided with a second connecting shaft sleeve. A circular through hole is opened on the side of the mounting base opposite to the second connecting shaft sleeve. The valve core screwing shell is fixed outside the circular through hole. The valve core screwing shell has a cylindrical structure. The second connecting shaft sleeve, the circular through hole and the valve core screwing shell are all coaxially arranged.

[0021] The second rotary connecting shaft is rotatably mounted on the second connecting shaft sleeve, and the second telescopic rotating rod is rotatably mounted on the valve core screwing housing. The first end of the second telescopic rotating rod is connected to the second rotary connecting shaft, and the second end of the second telescopic rotating rod is located in the valve core screwing housing.

[0022] The second connector is connected to the second end of the second telescopic rotating rod, and the second connector has a second snap-fit ​​hole that matches the snap-fit ​​connector on the valve core.

[0023] Preferably, the second rotary connecting shaft has a second sliding hole at one end facing the interior of the mounting base, and the cross-section of the second sliding hole is non-circular.

[0024] The second telescopic rotating rod includes a second sliding shaft and a second rotating transmission rod connected as one piece. The second sliding shaft is located in the valve core screwing housing. The second sliding shaft is slidably and rotatably connected in the valve core screwing housing. The cross-section of the second rotating transmission rod matches the cross-section of the second sliding hole. One end of the second rotating transmission rod away from the second sliding shaft is slidably disposed in the second sliding hole.

[0025] A second spring is sleeved on the outside of the second rotary transmission rod, and the two ends of the second spring abut against the second rotary connecting shaft and the second sliding shaft, respectively.

[0026] Preferably, the valve core screw housing is provided with a receiving hole, a sliding hole and a limiting hole connected in sequence. The diameters of the receiving hole and the limiting hole are both larger than the diameter of the sliding hole. The second sliding shaft is slidably and rotatably connected in the sliding hole. The end of the second sliding shaft near the second rotating transmission rod is provided with a limiting part, which is slidably and rotatably connected in the limiting hole.

[0027] Preferably, the valve core screw housing is provided with an oil pipe connector, and the oil pipe connector is connected to the sliding hole;

[0028] A first sealing ring and a second sealing ring are respectively provided on the inner wall of the receiving hole and the inner wall of the front section of the sliding hole.

[0029] Preferably, the rotary drive mechanism includes a drive motor and a flexible shaft, one end of which is connected to the output shaft of the drive motor, and the other end of which is connected to the valve cover screwing mechanism or the valve core screwing mechanism.

[0030] The present invention provides a screwing device for transformer oil valves, which can be installed at the end of a robot's robotic arm. The robot operates the device to screw the valve cover and valve core of the transformer oil valve to extract oil. This reduces the intensity of manual labor, improves oil extraction efficiency, and ensures good safety during operation. Attached Figure Description

[0031] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

[0032] Figure 1 A three-dimensional structural schematic diagram of a screwing device for a transformer oil valve according to an embodiment of the present invention is shown.

[0033] Figure 2 A schematic diagram of the connection structure between the valve cover screwing mechanism and the mounting base in the screwing device for transformer oil valve according to an embodiment of the present invention is shown.

[0034] Figure 3 A schematic diagram of the valve cover screwing mechanism in a screwing device for a transformer oil valve according to an embodiment of the present invention is shown.

[0035] Figure 4 A schematic diagram of the connection structure between the valve core screwing mechanism and the mounting base in the screwing device for transformer oil valve according to an embodiment of the present invention is shown.

[0036] In the diagram: 1-Mounting base, 11-First connecting shaft sleeve, 12-First rotating rod sleeve, 13-Second connecting shaft sleeve, 2-Valve cover screwing mechanism, 21-First rotating connecting shaft, 211-First sliding hole, 22-First telescopic rotating rod, 221-Connector, 222-First sliding shaft, 223-First rotating transmission rod, 23-First spring, 24-First connector, 241-First snap-fit ​​hole, 25-Valve cover screwing housing, 26-Rubber pad, 3-Valve core screwing mechanism, 31-Second rotating... Connecting shaft, 311-second sliding hole, 32-second telescopic rotating rod, 321-second sliding shaft, 322-second rotating transmission rod, 323-limiting part, 33-second spring, 34-second connecting piece, 341-second snap-fit ​​hole, 35-valve core screw housing, 351-accommodating hole, 352-sliding hole, 353-limiting hole, 36-oil pipe connector, 37-first sealing ring, 38-second sealing ring, 4-first drive motor, 5-second drive motor, 6-first flexible shaft, 7-second flexible shaft. Detailed Implementation

[0037] Various embodiments of the invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0038] This invention provides a screwing device for transformer oil valves, such as... Figure 1 As shown, the screwing device for a transformer oil valve includes a mounting base 1, a valve cover screwing mechanism 2, and a valve core screwing mechanism 3. The mounting base 1 is used to install on the end of the robotic arm of an oil-retrieving robot; both the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 are mounted on the mounting base 1, and are respectively connected to a rotary drive mechanism; the valve cover screwing mechanism 2 is used to connect to the valve cover of the transformer oil valve for screwing operation, and the valve core screwing mechanism 3 is used to connect to the valve core of the transformer oil valve for screwing operation.

[0039] The screwing device for transformer oil valves is installed at the end of the robot's robotic arm. The robot then moves the robotic arm to a predetermined position and uses the valve cover screwing mechanism 2 and valve core screwing mechanism 3 on the mounting base 1 at the end of the robotic arm to disassemble and install the valve cover and valve core of the transformer oil valve, respectively. This automates the screwing operation of the transformer oil valve, reduces manual labor intensity, improves oil extraction efficiency, and ensures good safety during operation.

[0040] The mounting base 1 is a hollow box-shaped structure. The valve cover screwing mechanism 2 and the valve core screwing mechanism 3 are staggered at a preset angle on the mounting base 1. In this embodiment, the mounting base 1 has multiple sets of parallel and opposite mounting sides. The valve cover screwing mechanism 2 and the valve core screwing mechanism 3 are respectively mounted on one set of mounting sides, and are staggered at a 90-degree angle on the mounting base 1. The mounting base 1 is also provided with an inclined mounting surface, which allows the mounting base 1 to be mounted on the end of the robotic arm of the oil-taking robot. By staggering the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 at a preset angle on the mounting base 1, the robot can control the robotic arm to swing to different angles so that the valve cover screwing mechanism 2 or the valve core screwing mechanism 3 is facing the transformer oil valve, thereby achieving the screwing operation and avoiding mutual interference between the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 during use.

[0041] See Figure 2 and Figure 3In this rotating device for transformer oil valves, the valve cover rotating mechanism 2 includes a first rotating connecting shaft 21, a first telescopic rotating rod 22, and a first connecting member 24. The mounting base 1 is provided with a first connecting shaft sleeve 11 and a first rotating rod sleeve 12, which are coaxially arranged. The first rotating connecting shaft 21 is rotatably mounted on the first connecting shaft sleeve 11, and the first telescopic rotating rod 22 is rotatably mounted on the first rotating rod sleeve 12. The first end of the first telescopic rotating rod 22 is connected to the first rotating connecting shaft 21, and the second end of the first telescopic rotating rod 22 extends beyond the first rotating rod sleeve 12. The first connecting member 24 is connected to the second end of the first telescopic rotating rod 22, and the first connecting member 24 has a first snap-fit ​​hole 241 that matches the snap-fit ​​connector on the valve cover. The first rotary connecting shaft 21 is connected to a rotary drive mechanism. The rotary drive mechanism drives the first rotary connecting shaft 21 to rotate, which in turn drives the first telescopic rotary rod 22 connected to the first rotary connecting shaft 21 to rotate. This causes the first connecting piece 24 connected to the second end of the first telescopic rotary rod 22 to rotate. The first connecting piece 24 can be engaged with the valve cover to drive the valve cover to rotate, thereby realizing the screwing operation of the valve cover. Figure 2 As shown, in this embodiment, the first connecting shaft sleeve 11 is disposed on one side of the mounting base 1 and extends into the interior of the mounting base 1. The first rotating rod sleeve 12 is disposed on the other side of the mounting base 1 opposite to the side where the first connecting shaft sleeve 11 is located, and extends out of the mounting base 1. A bearing is disposed between the first rotating connecting shaft 21 and the first connecting shaft sleeve 11 to reduce the friction when the first rotating connecting shaft 21 rotates in the first connecting shaft sleeve 11.

[0042] Furthermore, the first rotary connecting shaft 21 has a first sliding hole 211 at one end facing the interior of the mounting base 1, and the cross-section of the first sliding hole 211 is non-circular. The first telescopic rotating rod 22 includes a connector 221, a first sliding shaft 222, and a first rotary transmission rod 223 connected as a single unit in sequence. The connector 221 is located outside the first rotating rod bushing 12, and the first connecting piece 24 is connected to the connector 221. The first sliding shaft 222 is slidably and rotatably connected in the first rotating rod bushing 12. The cross-section of the first rotary transmission rod 223 matches the cross-section of the first sliding hole 211, and one end of the first rotary transmission rod 223 away from the first sliding shaft 222 is slidably disposed in the first sliding hole 211. A first spring 23 is sleeved on the outside of the first rotary transmission rod 223, and the two ends of the first spring 23 are respectively connected to the first rotary connecting shaft 21 and the first sliding shaft 222. Specifically, in this embodiment, the valve cover is provided with an external hexagonal bolt head, and the first snap-fit ​​hole 241 on the first connector 24 is an internal hexagonal shape that matches the external hexagonal bolt head on the valve cover; the front end of the connector 221 is provided with a groove for the first connector 24 to connect with it, and the first connector 24 can be connected to the groove at the front end of the connector 221 by interference fit, or the first connector 24 can be connected to the connector 221 by welding. In this embodiment, the cross-section of the first sliding hole 211 on the first rotating connecting shaft 21 is a regular hexagon, and the cross-section of the first rotating transmission rod 223 is also a regular hexagon. The first rotating transmission rod 223 can slide along the extension direction of the first sliding hole 211, and at the same time, when the first rotating connecting shaft 21 rotates, it can drive the first telescopic rotating rod 22 to rotate synchronously.

[0043] Furthermore, the connector 221 is also provided with a valve cover screwing housing 25, which is a cylindrical structure and is coaxially arranged with the first telescopic rotating rod 22. A rubber pad 26 is provided on the inner peripheral wall of the valve cover screwing housing 25. Specifically, a groove can be formed on the inner peripheral wall of the valve cover screwing housing 25, and the rubber pad 26 is disposed in the groove. The valve cover screwing housing 25 is used to fit over the outside of the valve cover when screwing the valve cover. By providing the rubber pad 26 inside the valve cover screwing housing 25, it can be ensured that the valve cover remains in the valve cover screwing mechanism 2 after being detached from the oil valve and will not fall off.

[0044] See Figure 4In the rotating device for transformer oil valve, the valve core rotating mechanism 3 includes a second rotating connecting shaft 31, a second telescopic rotating rod 32, a second connecting piece 34, and a valve core rotating housing 35. The mounting base 1 is provided with a second connecting shaft sleeve 13. A circular through hole is opened on the side of the mounting base 1 opposite to the second connecting shaft sleeve 13. The valve core screwing shell 35 is fixed outside the circular through hole. The valve core screwing shell 35 has a cylindrical structure. The second connecting shaft sleeve 13, the circular through hole, and the valve core screwing shell 35 are all coaxially arranged. The second rotating connecting shaft 31 is rotatably mounted on the second connecting shaft sleeve 13. The second telescopic rotating rod 32 is rotatably mounted on the valve core screwing shell 35. The first end of the second telescopic rotating rod 32 is connected to the second rotating connecting shaft 31, and the second end of the second telescopic rotating rod 32 is located in the valve core screwing shell 35. The second connecting piece 34 is connected to the second end of the second telescopic rotating rod 32, and the second connecting piece 34 has a second snap-fit ​​hole 341 that matches the snap-fit ​​connector on the valve core. In this embodiment, the second connecting shaft sleeve 13 is disposed on one side of the mounting base 1, and the second connecting shaft sleeve 13 extends into the interior of the mounting base 1. The circular through hole is disposed on the other side of the mounting base 1 opposite to the side where the second connecting shaft sleeve 13 is located. The valve core tightening mechanism 3 is disposed outside the mounting base 1. A bearing is disposed between the second rotating connecting shaft 31 and the second connecting shaft sleeve 13 to reduce the frictional force when the second rotating connecting shaft 31 rotates in the second connecting shaft sleeve 13. In this embodiment, the valve core is provided with an external hexagonal bolt head, and the second snap-fit ​​hole 341 on the second connector 34 is an internal hexagonal shape that matches the external hexagonal bolt head on the valve core.

[0045] Furthermore, the second rotary connecting shaft 31 has a second sliding hole 311 at one end facing the interior of the mounting base 1, and the cross-section of the second sliding hole 311 is non-circular. The second telescopic rotating rod 32 includes a second sliding shaft 321 and a second rotary transmission rod 322 connected as one piece. The second sliding shaft 321 is located in the valve core screwing housing 35 and is slidably and rotatably connected in the valve core screwing housing 35. The cross-section of the second rotary transmission rod 322 matches the cross-section of the second sliding hole 311, and one end of the second rotary transmission rod 322 away from the second sliding shaft 321 is slidably disposed in the second sliding hole 311. A second spring 33 is sleeved on the outside of the second rotary transmission rod 322, and the two ends of the second spring 33 abut against the second rotary connecting shaft 31 and the second sliding shaft 321, respectively. In this embodiment, the front end of the second sliding shaft 321 is provided with a groove for the second connecting member 34 to connect thereto. The second connecting member 34 can be connected to the groove at the front end of the second sliding shaft 321 by interference fit, or the second connecting member 34 can be connected to the second sliding shaft 321 by welding. In this embodiment, the cross-section of the second sliding hole 311 on the second rotating connecting shaft 31 is hexagonal, and the cross-section of the second rotating transmission rod 322 is also hexagonal. The second rotating transmission rod 322 can slide along the extension direction of the second sliding hole 311, and at the same time, when the second rotating connecting shaft 31 rotates, it can drive the second telescopic rotating rod 32 to rotate synchronously.

[0046] Furthermore, the valve core screw housing 35 is provided with a receiving hole 351, a sliding hole 352, and a limiting hole 353 connected in sequence. The diameters of the receiving hole 351 and the limiting hole 353 are both larger than the diameter of the sliding hole 352. The front sections of the receiving hole 351 and the sliding hole 352 are used to engage with the valve body. The second sliding shaft 321 is slidably and rotatably connected in the sliding hole 352. A limiting part 323 is provided at one end of the second sliding shaft 321 near the second rotating transmission rod 322. The limiting part 323 is slidably and rotatably connected in the limiting hole 353. By providing the limiting part 323 on the second sliding shaft 321, the second sliding shaft 321 can be prevented from dislodging from the sliding hole 352, thereby limiting the movement range of the second telescopic rotating rod 32.

[0047] Furthermore, the valve core screw-out housing 35 is provided with an oil pipe connector 36, which is connected to the sliding hole 352; a first sealing ring 37 and a second sealing ring 38 are respectively provided on the inner wall of the receiving hole 351 and the inner wall of the front section of the sliding hole 352. Specifically, the valve body after screwing open is located in the valve core screw-out housing 35. The first sealing ring 37 and the second sealing ring 38 on the inner wall of the receiving hole 351 and the inner wall of the front section of the sliding hole 352 can form a seal with the outer wall of the valve body. By forming a seal at both the front and rear positions between the valve body and the valve core screw-out housing 35, the seal is strengthened and guaranteed, thereby preventing oil and air leakage during oil extraction. In this embodiment, a third sealing ring is provided on the outside of the second sliding shaft 321. The third sealing ring can form a seal between the second sliding shaft 321 and the sliding hole 352, preventing oil and air leakage at the connection between the second sliding shaft 321 and the sliding hole 352.

[0048] See also Figure 1 The rotary drive mechanism includes a drive motor and a flexible shaft. One end of the flexible shaft is connected to the output shaft of the drive motor, and the other end is connected to the valve cover screwing mechanism 2 or the valve core screwing mechanism 3. In this embodiment, the first rotary connecting shaft 21 of the valve cover screwing mechanism 2 is connected to the first motor via a first flexible shaft 6, and the second rotary connecting shaft 31 of the valve core screwing mechanism 3 is connected to the second motor via a second flexible shaft 7. The valve cover screwing mechanism 2 and the valve core screwing mechanism 3 are respectively connected to their corresponding drive motors via flexible shafts, which facilitates the long-distance arrangement of the drive motors. For example, the drive motors can be arranged on the robot's torso, reducing the structural weight and space occupied by the robot's robotic arm and increasing the flexibility during operation.

[0049] In this embodiment, when it is necessary to unscrew the valve cover of the transformer oil valve to extract oil, the valve cover screwing mechanism 2, driven by the robotic arm, is inserted into the outside of the transformer oil valve body. At this time, the valve cover screwing housing 25 is fitted onto the valve cover, and the first connecting piece 24 is tightly engaged with the external hexagonal bolt head on the valve cover. Simultaneously, the first drive motor 4 drives the first flexible shaft 6 to rotate counterclockwise, thereby causing the first rotating connecting shaft 21 connected to the first flexible shaft 6, the first telescopic rotating rod 22 connected to the first rotating connecting shaft 21, and the first connecting piece 24 connected to the first telescopic rotating rod 22 to rotate together. During rotation, the first telescopic rotating rod 22 retracts and slides towards the first rotating connecting shaft 21, compressing the first spring 23 during this sliding process. The valve cover and the oil valve body are connected by threads. When the valve cover is screwed, it moves along the sliding direction of the first telescopic rotating rod 22, thus detaching from the valve body. When the oil extraction operation is completed and the valve cover needs to be screwed in, the first drive motor 4 drives the first flexible shaft 6 and the first rotating connecting shaft 21 to rotate and drive the first telescopic rotating rod 22 to rotate clockwise. During the rotation, the first telescopic rotating rod 22 extends and slides away from the first rotating connecting shaft 21. The valve cover moves towards the valve body under the drive of the first telescopic rotating rod 22. At the same time, the first spring 23, which is in a compressed state, begins to rebound and pushes the first telescopic rotating rod 22 outward. At this time, the valve cover contacts the valve body and returns to its original position under the combined action of the first telescopic rotating rod 22 and the first spring 23.

[0050] When it is necessary to unscrew the valve core of the transformer oil valve to extract oil, the valve core screwing mechanism 3, driven by the robotic arm, is inserted into the outside of the transformer oil valve body. At this time, the valve core screwing housing 35 is fitted onto the valve core, and the second connecting piece 34 is tightly engaged with the external hexagonal bolt head on the valve core. Simultaneously, the second drive motor 5 drives the second flexible shaft 7 to rotate counterclockwise, thereby causing the second rotating connecting shaft 31 connected to the second flexible shaft 7, the second telescopic rotating rod 32 connected to the second rotating connecting shaft 31, and the second connecting piece 34 connected to the second telescopic rotating rod 32 to rotate together. During rotation, the second telescopic rotating rod 32 retracts and slides towards the second rotating connecting shaft 31, compressing the second spring 33 during this sliding process. The valve core is connected to the oil valve body via threads. When the valve core is screwed, it moves along the sliding direction of the second telescopic rotating rod 32, thus detaching from the valve body. After the valve core is removed, the valve's oil passage is opened, allowing transformer oil to flow out or be extracted along the oil pipe joint 36. When the oil extraction operation is completed and the valve core needs to be screwed in, the second motor drives the second flexible shaft 7 and the second rotary connecting shaft 31 to rotate, which in turn drives the second telescopic rotating rod 32 to rotate clockwise. During the rotation, the second telescopic rotating rod 32 extends and slides away from the second rotary connecting shaft 31. The valve core moves towards the valve body under the action of the second telescopic rotating rod 32. At the same time, the second spring 33, which is in a compressed state, begins to rebound, pushing the second telescopic rotating rod 32 outward. At this time, the valve core contacts the valve body and returns to its original position under the combined action of the second telescopic rotating rod 32 and the second spring 33.

[0051] In summary, the screwing device for transformer oil valves provided by this invention can be installed at the end of a robot's robotic arm, and the robot can operate it to automatically screw the valve cover and valve core of the transformer oil valve, thereby reducing the intensity and risk of manual labor and improving the subsequent oil extraction efficiency.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0053] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A screwing device for a transformer oil valve, characterized in that, Includes a mounting base, a valve cover tightening mechanism, and a valve core tightening mechanism; among which, The mounting base is used to install on the end of the robotic arm of the oil extraction robot; Both the valve cover screwing mechanism and the valve core screwing mechanism are mounted on the mounting base, and each of the valve cover screwing mechanism and the valve core screwing mechanism is connected to a rotary drive mechanism. The valve cover screwing mechanism is used to connect with the valve cover of the transformer oil valve to perform a screwing operation, and the valve core screwing mechanism is used to connect with the valve core of the transformer oil valve to perform a screwing operation. The valve cover screwing mechanism includes a first rotary connecting shaft, a first telescopic rotating rod, and a first connecting member; wherein... The mounting base is provided with a first connecting shaft sleeve and a first rotating rod sleeve, and the first connecting shaft sleeve and the first rotating rod sleeve are coaxially arranged. The first rotating connecting shaft is rotatably mounted on the first connecting shaft sleeve, the first telescopic rotating rod is rotatably mounted on the first rotating rod sleeve, the first end of the first telescopic rotating rod is connected to the first rotating connecting shaft, and the second end of the first telescopic rotating rod extends out of the first rotating rod sleeve; The first connector is connected to the second end of the first telescopic rotating rod, and the first connector has a first snap-fit ​​hole that matches the snap-fit ​​connector on the valve cover.

2. The screw-on device for a transformer oil valve according to claim 1, characterized in that, The mounting base is a hollow box, and the valve cover screwing mechanism and the valve core screwing mechanism are staggered at a preset angle on the mounting base.

3. The screwing device for a transformer oil valve according to claim 1, characterized in that, The first rotary connecting shaft has a first sliding hole at one end facing the interior of the mounting base, and the cross-section of the first sliding hole is non-circular. The first telescopic rotating rod includes a connector, a first sliding shaft, and a first rotating transmission rod connected in sequence. The connector is located outside the first rotating rod bushing. The first sliding shaft is slidably and rotatably connected in the first rotating rod bushing. The cross-section of the first rotating transmission rod matches the cross-section of the first sliding hole. One end of the first rotating transmission rod away from the first sliding shaft is slidably disposed in the first sliding hole. A first spring is sleeved on the outside of the first rotary transmission rod, and the two ends of the first spring are respectively connected to the first rotary connecting shaft and the first sliding shaft.

4. The screwing device for a transformer oil valve according to claim 3, characterized in that, The connector is provided with a valve cover screw housing, which is a cylindrical structure and is coaxially arranged with the first telescopic rotating rod. A rubber pad is provided on the inner peripheral wall of the valve cover screw housing.

5. The screwing device for a transformer oil valve according to any one of claims 1-4, characterized in that, The valve core screwing mechanism includes a second rotary connecting shaft, a second telescopic rotating rod, a second connecting piece, and a valve core screwing housing; wherein... The mounting base is provided with a second connecting shaft sleeve. A circular through hole is opened on the side of the mounting base opposite to the second connecting shaft sleeve. The valve core screwing shell is fixed outside the circular through hole. The valve core screwing shell has a cylindrical structure. The second connecting shaft sleeve, the circular through hole and the valve core screwing shell are all coaxially arranged. The second rotary connecting shaft is rotatably mounted on the second connecting shaft sleeve, and the second telescopic rotating rod is rotatably mounted on the valve core screwing housing. The first end of the second telescopic rotating rod is connected to the second rotary connecting shaft, and the second end of the second telescopic rotating rod is located in the valve core screwing housing. The second connector is connected to the second end of the second telescopic rotating rod, and the second connector has a second snap-fit ​​hole that matches the snap-fit ​​connector on the valve core.

6. The screwing device for a transformer oil valve according to claim 5, characterized in that, The second rotary connecting shaft has a second sliding hole at one end facing the interior of the mounting base, and the cross-section of the second sliding hole is non-circular. The second telescopic rotating rod includes a second sliding shaft and a second rotating transmission rod connected as one piece. The second sliding shaft is located in the valve core screwing housing. The second sliding shaft is slidably and rotatably connected in the valve core screwing housing. The cross-section of the second rotating transmission rod matches the cross-section of the second sliding hole. One end of the second rotating transmission rod away from the second sliding shaft is slidably disposed in the second sliding hole. A second spring is sleeved on the outside of the second rotary transmission rod, and the two ends of the second spring abut against the second rotary connecting shaft and the second sliding shaft, respectively.

7. The screwing device for a transformer oil valve according to claim 6, characterized in that, The valve core screw housing has a receiving hole, a sliding hole and a limiting hole connected in sequence. The diameters of the receiving hole and the limiting hole are both larger than the diameter of the sliding hole. The second sliding shaft is slidably and rotatably connected in the sliding hole. The end of the second sliding shaft near the second rotating transmission rod is provided with a limiting part, which is slidably and rotatably connected in the limiting hole.

8. The screwing device for a transformer oil valve according to claim 7, characterized in that, The valve core screw housing is provided with an oil pipe connector, which is connected to the sliding hole; A first sealing ring and a second sealing ring are respectively provided on the inner wall of the receiving hole and the inner wall of the front section of the sliding hole.

9. The screwing device for a transformer oil valve according to claim 1, characterized in that, The rotary drive mechanism includes a drive motor and a flexible shaft. One end of the flexible shaft is connected to the output shaft of the drive motor, and the other end of the flexible shaft is connected to the valve cover screwing mechanism or the valve core screwing mechanism.

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