Automatic transformer oil taking device

Abstract

The application relates to a transformer automatic oil taking device, and belongs to the technical field of transformer operation and maintenance, which comprises a base, a valve cover screwing mechanism, a valve core screwing mechanism, a driving mechanism and a transmission assembly; wherein the valve cover screwing mechanism and the valve core screwing mechanism are rotationally arranged on the base, the valve core screwing mechanism and the valve cover screwing mechanism are transmissionally connected through the transmission assembly, and the power input end of the valve cover screwing mechanism is connected with the power output end of the driving mechanism. The transformer automatic oil taking device is compact in structure, is convenient to use in a narrow space, is installed at the end of the mechanical arm of an operation and maintenance oil taking robot, the position and posture of the automatic oil taking device can be controlled by the mechanical arm, automatic oil taking of the transformer can be realized, the labor intensity can be reduced, the oil taking efficiency and safety during operation can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer operation and maintenance, and more particularly to an automatic transformer oil taking device. BACKGROUND

[0002] In transformer operation and maintenance, oil samples are taken regularly for oil analysis to understand the quality and performance of the insulation oil in operation. When taking oil samples from a transformer, in order not to affect the normal operation of the system, the operation and maintenance personnel will carry out live-line operation, i.e. live-line oil taking. The traditional manual live-line oil taking method has high labor intensity, high safety risk, poor working environment, is easily affected by weather environment, and belongs to high-altitude, high-risk and high-intensity operation. Although the unsafe factors such as electric shock and falling from a high place of the operating personnel have been reduced after the live-line oil taking enters the era of insulated aerial work platforms, the tool performance and operating environment still have a great impact on personal and equipment safety.

[0003] The live-line operation of the insulated aerial work platform has experienced different development stages. The first stage is direct operation stage: the physical fitness and skill level of the operating electrician are required to be high in this stage, the operating electrician needs to wear good insulation protection appliances in the working bucket to control the insulated aerial work platform to the high-altitude operating position, and directly operates by hand. Because the operating electrician is in a high-altitude and high-voltage operating environment, if the operating electrician is careless or the insulation protection is insufficient, safety accidents such as falling from a high place and electric shock will occur. The second stage is remote control mechanical arm stage: the operating electrician and the mechanical arm system are in the working bucket, the electrician operates the insulated aerial work platform to the high-altitude operating position, and the electrician transmits the operating intention to the mechanical arm (hand) by operating the mechanical handle to replace the hand to operate. In this operating mode, the operating electrician is still in a high-altitude position, and the system automation level is low, which is easily disturbed by the environment and also has the risk of falling from a high place.

[0004] However, there is no automatic oil taking device for the end of the operation and maintenance oil taking robot specially designed for the structure of the transformer oil taking valve at present, so as to complete the automatic oil taking operation under the premise of ensuring the quality of the oil. Secondly, due to the requirement of the main transformer civil construction, the environment around the transformer is complex and the space is relatively small, and the design structure of the oil taking valve is special. The oil taking device in the prior art adopts the form of hydraulic three claws or six claws, which is relatively bulky and large in size, and is not conducive to completing the automatic oil taking operation of the main transformer. SUMMARY

[0005] Therefore, the present application aims to provide a transformer automatic oil taking device to solve the problems in the prior art.

[0006] According to the present application, a transformer automatic oil taking device is provided, which comprises a base, a valve cover screwing mechanism, a valve core screwing mechanism, a driving mechanism and a transmission assembly, wherein,

[0007] The valve cover screw mechanism and the valve core screw mechanism are both rotationally arranged on the base, and the valve core screw mechanism is in transmission connection with the valve cover screw mechanism through the transmission assembly.

[0008] The power input end of the valve cover screw mechanism is connected with the power output end of the driving mechanism.

[0009] Preferably, the valve cover screw mechanism comprises a valve cover screw shaft rotationally connected to the base and a valve cover screw sleeve fixed to the front end of the valve cover screw shaft, and the rear end of the valve cover screw shaft is connected with the driving mechanism.

[0010] The valve core screw mechanism comprises a valve core screw shaft rotationally connected to the base and a valve core screw sleeve fixed to the front end of the valve core screw shaft.

[0011] The valve cover screw shaft and the valve core screw shaft are arranged in a spaced manner, and the axis of the valve cover screw shaft is parallel to the axis of the valve core screw shaft, and the valve core screw shaft is in transmission connection with the valve cover screw shaft through the transmission assembly.

[0012] Preferably, the transmission assembly comprises two synchronous pulleys and a synchronous belt, and the two synchronous pulleys are respectively fixed to the valve cover screw shaft and the valve core screw shaft, and the two synchronous pulleys are in transmission connection through the synchronous belt.

[0013] Preferably, the base is provided with a first bearing seat and a second bearing seat in a spaced manner, the valve cover screw shaft is rotationally arranged on the first bearing seat, and the valve core screw shaft is rotationally arranged on the second bearing seat.

[0014] Preferably, the valve cover screw sleeve is provided with a first clamping groove matched with a clamping head on the valve cover, and the valve core screw sleeve is provided with a second clamping groove matched with a clamping head on the valve core.

[0015] Preferably, the valve core screw shaft is provided with an oil taking channel in the center, and the oil taking channel penetrates through the rear end face of the valve core screw shaft and the second clamping groove.

[0016] Preferably, the oil taking channel is provided with an oil pipe connecting groove at one end close to the second clamping groove, and the oil pipe connecting groove is used for connecting with an oil outlet pipe of the valve core.

[0017] Preferably, the oil pipe connecting groove is provided with a sealing ring on the inner peripheral wall.

[0018] Preferably, the rear end of the valve core screw shaft is provided with a spigot joint used for connecting with an oil taking hose.

[0019] Preferably, the driving mechanism is an electric motor.

[0020] The automatic transformer oil taking device provided by the application is provided with a valve cover screwing mechanism and a valve core screwing mechanism for screwing the valve cover and the valve core of the transformer oil taking valve respectively, the valve core screwing mechanism and the valve cover screwing mechanism are drivingly connected through a transmission assembly, the valve core screwing mechanism can be driven to rotate simultaneously by driving the valve cover screwing mechanism to rotate through a driving mechanism, so that the structure of the automatic oil taking device is more compact, the overall structure can be miniaturized to facilitate the use in a narrow working environment. The automatic oil taking device can be installed at the end of the mechanical arm of the operation and maintenance oil taking robot through a base, the position and posture of the automatic oil taking device are controlled by the mechanical arm to realize automatic oil taking of the transformer, the labor intensity of human operation can be reduced, the oil taking efficiency can be improved, and the safety during operation can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application with reference to the accompanying drawings.

[0022] Figure 1 A structure diagram of a transformer oil taking valve is shown.

[0023] Figure 2 A structure diagram of the transformer oil taking valve when the valve cover is opened is shown.

[0024] Figure 3 A three-dimensional structure diagram of the automatic transformer oil taking device according to the embodiment of the present application is shown.

[0025] Figure 4 A structure diagram of the valve core screwing mechanism in the automatic transformer oil taking device according to the embodiment of the present application is shown.

[0026] Figure 5 A state diagram of the automatic transformer oil taking device when screwing the valve cover according to the embodiment of the present application is shown.

[0027] Figure 6 A state diagram of the automatic transformer oil taking device when screwing the valve core according to the embodiment of the present application is shown.

[0028] In the drawings: 1, base; 11, first bearing seat; 12, second bearing seat; 2, valve cover screwing mechanism; 21, valve cover screwing sleeve; 211, first clamping groove; 3, valve core screwing mechanism; 31, valve core screwing sleeve; 311, second clamping groove; 32, valve core screwing shaft; 33, oil taking channel; 331, oil pipe connecting groove; 34, jewel connector; 4, driving mechanism; 5, transmission assembly; 51, synchronous pulley; 52, synchronous belt; 6, oil taking valve; 61, valve cover; 62, valve core; 621, oil outlet pipe; 63, valve body. Detailed Implementation

[0029] 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.

[0030] This invention provides an automatic oil extraction device for transformers, see [link to relevant documentation]. Figure 3 The automatic oil extraction device for the transformer includes: a base 1, a valve cover screwing mechanism 2, a valve core screwing mechanism 3, a drive mechanism 4, and a transmission assembly 5. Both the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 are rotatably mounted on the base 1, and the valve core screwing mechanism 3 and the valve cover screwing mechanism 2 are connected by the transmission assembly 5. The power input end of the valve cover screwing mechanism 2 is connected to the power output end of the drive mechanism 4. This automatic oil extraction device for transformers is used to install the end of the robotic arm of a transformer maintenance oil extraction robot. Its valve cover screwing mechanism 2 can be used to automatically screw the valve cover 61 of the transformer oil extraction valve, and the valve core screwing mechanism 3 can be used to automatically screw the valve core 62 of the transformer oil extraction valve. Since the valve core screwing mechanism 3 is connected to the valve cover screwing mechanism 2 through the transmission component 5, the drive mechanism 4 can simultaneously drive the valve core screwing mechanism 3 to rotate when driving the valve cover screwing mechanism 2 to rotate, thereby reducing the number of drive mechanisms 4 and making the automatic oil extraction device more compact. This achieves the miniaturization of the automatic oil extraction device structure, which is convenient for robotic arm operation and use in confined spaces.

[0031] See Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram of the transformer oil sampling valve targeted by the automatic oil sampling device for this transformer. The transformer oil sampling valve 6 includes a valve body 63, a valve core 62, and a valve cover 61. The valve body 63 is connected to the transformer, and the valve core 62 and valve cover 61 are screwed onto the valve body 63. The valve cover 61 covers the outside of the valve core 62 for protection. The valve core 62 has an oil outlet pipe 621. By loosening the valve core 62, the oil in the transformer can flow out through the oil outlet pipe 621. When using this automatic oil sampling device to sample oil from the transformer, first remove the valve cover 61 using the valve cover tightening mechanism 2, and then tighten the valve core 62 using the valve core tightening mechanism 3. After the valve core 62 is tightened outward a certain distance, the oil inside the transformer can flow out along the oil outlet pipe 621.

[0032] Continue reading Figure 3The valve cover screwing mechanism 2 comprises a valve cover screwing rotating shaft and a valve cover screwing sleeve 21. The valve cover screwing rotating shaft is rotatably connected to the base 1. The valve cover screwing sleeve 21 is fixedly arranged on the front end of the valve cover screwing rotating shaft. The rear end of the valve cover screwing rotating shaft is connected to the driving mechanism 4. The valve core screwing mechanism 3 comprises a valve core screwing rotating shaft 32 and a valve core screwing sleeve 31. The valve core screwing rotating shaft 32 is rotatably connected to the base 1. The valve core screwing sleeve 31 is fixedly arranged on the front end of the valve core screwing rotating shaft 32. The valve cover screwing rotating shaft and the valve core screwing rotating shaft 32 are arranged in a spaced manner. The axis of the valve cover screwing rotating shaft is parallel to the axis of the valve core screwing rotating shaft 32. The valve core screwing rotating shaft 32 is drivingly connected to the valve cover screwing rotating shaft through the transmission assembly 5. Specifically, the valve cover screwing rotating shaft and the valve core screwing rotating shaft 32 pass through the base 1. The front end of the valve cover screwing rotating shaft and the front end of the valve core screwing rotating shaft 32 are located on the front side of the base 1. The rear end of the valve cover screwing rotating shaft and the rear end of the valve core screwing rotating shaft 32 are located on the rear side of the base 1.

[0033] Further, the transmission assembly 5 is a synchronous transmission assembly. Specifically, the transmission assembly 5 comprises two synchronous pulleys 51 and a synchronous belt 52. The two synchronous pulleys 51 are fixedly arranged on the valve cover screwing rotating shaft and the valve core screwing rotating shaft 32 respectively. The two synchronous pulleys 51 are drivingly connected through the synchronous belt 52. In this embodiment, the two synchronous pulleys 51 are fixedly connected to the rear ends of the valve cover screwing rotating shaft and the valve core screwing rotating shaft 32 respectively and are located on the rear side of the base 1. The synchronous belt 52 is arranged around the two synchronous pulleys 51. The synchronous belt 52 is drivingly connected to the two synchronous pulleys 51. Thus, the valve core screwing rotating shaft 32 and the valve cover screwing rotating shaft have the same rotating speed. Through the synchronous transmission assembly, the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 can be synchronously driven by the driving mechanism 4. Thus, the rotating speed of the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 can be conveniently controlled.

[0034] Further, the base 1 is provided with a first bearing seat 11 and a second bearing seat 12 in a spaced manner. The valve cover screwing rotating shaft is rotatably arranged on the first bearing seat 11. The valve core screwing rotating shaft 32 is rotatably arranged on the second bearing seat 12. Through the first bearing seat 11 and the second bearing seat 12 arranged on the base 1, the valve cover screwing mechanism 2 and the valve core screwing mechanism 3 can be smoothly rotated on the base 1.

[0035] The valve cover screwing sleeve 21 is provided with a first clamping groove 211 matched with the clamping joint on the valve cover 61. The valve core screwing sleeve 31 is provided with a second clamping groove 311 matched with the clamping joint on the valve core 62. In this embodiment, the clamping joint on the valve cover 61 and the clamping joint on the valve core 62 are both hexagonal structures. Correspondingly, the first clamping groove 211 and the second clamping groove 311 are both internal hexagonal grooves.

[0036] Further, asFigure 4 As shown, the valve core screwing shaft 32 is provided with an oil taking channel 33 in the center, which penetrates the rear end surface of the valve core screwing shaft 32 and the second clamping groove 311. By providing the oil taking channel 33 in the center of the valve core screwing shaft 32, when the valve core screwing mechanism 3 unscrews the valve core 62 of the oil taking valve, the oil flowing out of the oil outlet pipe 621 of the oil taking valve can flow out through the oil taking channel 33 on the valve core screwing shaft 32, and the rear end of the valve core screwing shaft 32 can be connected to an oil taking hose, through which the oil is introduced into an oil taking container. In this embodiment, the rear end of the valve core screwing shaft 32 is provided with a spigot joint 34, and the oil taking hose can be connected to the spigot joint 34 at the rear end of the valve core screwing shaft 32, and the spigot joint 34 can be more firmly connected to the oil taking hose to prevent loosening. Further, in the valve core screwing mechanism 3, the oil taking channel 33 is provided with an oil pipe connecting groove 331 at one end close to the second clamping groove 311, which is used to connect to the oil outlet pipe 621 of the valve core 62. A sealing ring is provided on the inner peripheral wall of the oil pipe connecting groove 331 (not shown in the figure), which can ensure reliable sealing when the oil outlet pipe 621 on the valve core 62 of the oil taking valve is connected to the valve core screwing mechanism 3, preventing oil leakage at the connection.

[0037] In this embodiment, the driving mechanism 4 is an electric motor. It can be understood that the driving mechanism 4 can also be a pneumatic motor or a hydraulic motor, and the present application does not make any limitation thereon. When the automatic oil taking device is installed at the end of the mechanical arm of the transformer operation and maintenance oil taking robot, the base 1 and the driving mechanism 4 can be respectively fixedly connected to the mechanical arm, or the driving mechanism 4 can be fixedly connected to the base 1, and then the base 1 is fixedly connected to the mechanical arm.

[0038] The transformer automatic oil taking device is installed at the end of the mechanical arm of the transformer operation and maintenance oil taking robot, and the automatic oil taking device is controlled by the mechanical arm to automatically take oil from the transformer. The method for automatically taking oil from the transformer by using the automatic oil taking device includes the following steps:

[0039] The valve cover screwing sleeve 21 of the valve cover screwing mechanism 2 is aligned with the valve cover 61 of the oil taking valve, the valve cover screwing sleeve 21 is sleeved on the outside of the valve cover 61, and the valve cover 61 is screwed by driving the valve cover screwing mechanism 2 to rotate by the driving mechanism 4, as shown in Figure 5 .

[0040] The valve cover screwing sleeve 21 is rotated to screw the valve cover 61 away from the valve body 63, the mechanical arm controls the automatic oil taking device to retreat, and the valve core 62 is exposed; then the mechanical arm controls the automatic oil taking device to move to align the valve core screwing sleeve 31 of the valve core screwing mechanism 3 with the valve core 62 of the oil taking valve, the valve core screwing sleeve 31 is sleeved outside the valve core 62, and the valve core 62 is screwed by driving the valve core screwing mechanism 3 to rotate and then rotating, as shown in Figure 6 The valve core 62 is screwed to a certain extent, and the oil in the transformer can flow out along the oil outlet pipe 621 on the valve core 62, and then flow out through the oil taking channel 33 on the valve core screwing mechanism 3, and the oil can be introduced into the oil taking container through the oil taking hose connected to the rear end of the valve core screwing mechanism 3.

[0041] After the oil taking is completed, the valve core 62 is screwed, and the valve cover 61 is covered outside the valve core 62 again, and the oil taking work is completed.

[0042] In summary, the automatic oil taking device for the transformer provided by the application is provided with a valve cover screwing mechanism and a valve core screwing mechanism for screwing the valve cover and the valve core of the oil taking valve of the transformer respectively, the valve core screwing mechanism and the valve cover screwing mechanism are drivingly connected through a transmission assembly, the valve core screwing mechanism is driven to rotate by the driving mechanism, and the valve core screwing mechanism is driven to rotate at the same time, so that the structure of the automatic oil taking device is more compact, the overall structure can be miniaturized, and the automatic oil taking device is convenient to use in a narrow working environment. The automatic oil taking device can be installed at the end of the mechanical arm of the operation and maintenance oil taking robot through the base, the position and posture of the automatic oil taking device are controlled by the mechanical arm, the transformer is automatically taken oil, the labor intensity of human operation is reduced, the oil taking efficiency is improved, and the safety during operation is improved.

[0043] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0044] It should be pointed out finally that the above embodiments are merely examples for clearly illustrating the present application and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. It is unnecessary and impossible to enumerate all the embodiments. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An automatic oil extraction device for a transformer, characterized in that, include: The base, valve cover screwing mechanism, valve core screwing mechanism, drive mechanism, and transmission assembly; among which, Both the valve cover screwing mechanism and the valve core screwing mechanism are rotatably mounted on the base, and the valve core screwing mechanism and the valve cover screwing mechanism are connected by the transmission assembly. The power input end of the valve cover screwing mechanism is connected to the power output end of the drive mechanism; The valve cover screwing mechanism includes a valve cover screwing shaft and a valve cover screwing sleeve. The valve cover screwing shaft is rotatably connected to the base, the valve cover screwing sleeve is fixed to the front end of the valve cover screwing shaft, and the rear end of the valve cover screwing shaft is connected to the drive mechanism. The valve core turning mechanism includes a valve core turning shaft and a valve core turning sleeve. The valve core turning shaft is rotatably connected to the base, and the valve core turning sleeve is fixed to the front end of the valve core turning shaft. The valve cover screwing shaft and the valve core screwing shaft are spaced apart, and the axis of the valve cover screwing shaft is parallel to the axis of the valve core screwing shaft. The valve core screwing shaft is connected to the valve cover screwing shaft through the transmission assembly. The transmission assembly includes two synchronous pulleys and a synchronous belt. The two synchronous pulleys are respectively fixed on the valve cover screwing shaft and the valve core screwing shaft, and the two synchronous pulleys are connected and transmitted through the synchronous belt. The valve cover screwing sleeve is provided with a first snap-fit ​​groove that matches the snap-fit ​​connector on the valve cover, and the valve core screwing sleeve is provided with a second snap-fit ​​groove that matches the snap-fit ​​connector on the valve core. The valve core screwing shaft has an oil intake channel at its center, which passes through the rear end face of the valve core screwing shaft and the second snap-fit ​​groove; An oil pipe connection groove is provided at one end of the oil intake channel near the second snap-fit ​​groove. The oil pipe connection groove is used to connect to the oil outlet pipe of the valve core.

2. The automatic oil extraction device for transformers according to claim 1, characterized in that, The base is provided with a first bearing seat and a second bearing seat at intervals. The valve cover screwing shaft is rotatably mounted on the first bearing seat, and the valve core screwing shaft is rotatably mounted on the second bearing seat.

3. The automatic oil extraction device for transformers according to claim 1, characterized in that, A sealing ring is provided on the inner circumferential wall of the oil pipe connection groove.

4. The automatic oil extraction device for transformers according to claim 1, characterized in that, The rear end of the valve core screw shaft is provided with a pagoda connector, which is used to connect to the oil extraction hose.

5. The automatic oil extraction device for transformers according to claim 1, characterized in that, The drive mechanism is a motor.

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