Long-distance manual-automatic integrated emergency oil discharge device

Abstract

The invention discloses a long-distance manual-automatic integrated emergency oil discharge device, and relates to the field of long-distance manual-automatic integrated emergency oil discharge devices. A long-distance manual-automatic integrated emergency oil discharge device comprises a transmission rod, a torsion amplifier, a transformer valve body, a supporting frame and a driving mechanism, and the transformer valve body is arranged on the rear side of the transmission rod. According to the long-distance manual-automatic integrated emergency oil discharge device, an electric driver and an operation hand wheel are designed to be in an electric operation mode and a manual operation mode, during electric operation, an operator can electrically drive a one-button switch transformer valve body through a visual man-machine interaction screen, the electric driver is powered by a rechargeable battery, and the electric driver is powered by the rechargeable battery; an 86 type large-torque stepping motor is adopted as an electric driver, a 1: 10 secondary planetary reducer is used in a matched mode, the rotating speed is 3000 rpm, namely 22.5 * 60 / (30000 / 10) = 4.5 S, then the time for starting acceleration and deceleration is synthesized, the transformer valve body can be opened or closed in about 7 seconds, and during manual operation, an operator rotates a hand wheel by 22.5 circles to open and close the transformer valve body.

Description

Technical Field

[0001] The present invention relates to the field of long-distance manual and automatic integrated emergency oil drainage devices, and particularly to a long-distance manual and automatic integrated emergency oil drainage device. Background Art

[0002] As the most important main equipment in a substation, the safe and stable operation of a transformer is of great significance for ensuring power supply. When a transformer catches fire and explodes, if the insulating oil inside the oil tank cannot be discharged to the accident oil pool through the oil sump in time, the duration of the fire will be longer, and it may explode, causing a large amount of insulating oil to overflow. The oil fire will spread and expand the fire area, increasing the difficulty of fire fighting, and seriously threatening the safe operation of the substation and the reliable power supply. If the transformer oil can be quickly discharged to the accident oil pool in the initial stage of the transformer fire, the development of the fire can be effectively controlled. Currently, although the transformer is equipped with an emergency oil drainage valve when leaving the factory, it only has the function of short-distance manual operation, and the operator cannot approach after the transformer explodes; moreover, the opening torque of the oil drainage valve is as high as several thousand Newton-meters, and the opening difficulty is very high. A mechanical transmission control method with long-distance, multi-angle, and multi-transmission mechanism coupling is adopted to achieve long-distance and convenient oil drainage in case of emergency without changing the existing oil drainage pipeline structure.

[0003] When an emergency occurs in an existing transformer, the transformer oil cannot be discharged quickly and safely, and thus the internal pressure cannot be reduced, resulting in the further expansion of the accident and reducing the safety of the surrounding environment of the substation.

[0004] Therefore, it is necessary to provide a long-distance manual and automatic integrated emergency oil drainage device to solve the above technical problems. The disclosure of this background art section is only intended to increase the understanding of the overall background of the present invention, and is not necessarily regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0005] The present invention provides a long-distance manual and automatic integrated emergency oil drainage device, which solves the technical problem that when an emergency occurs in a transformer, the transformer oil cannot be discharged quickly and safely, and thus the internal pressure cannot be reduced, resulting in the further expansion of the accident and reducing the safety of the surrounding environment of the substation.

[0006] To solve the above technical problems, a long-distance manual and automatic integrated emergency oil drainage device provided by the present invention includes a transmission rod, a torque amplifier, a transformer valve body, a support frame, and a driving mechanism. The transformer valve body is arranged at the rear side of the transmission rod, the torque amplifier is arranged on the top of the transformer valve body, the driving mechanism is installed at the front side of the transmission rod, the driving mechanism is installed above the support frame, and the transformer valve body includes a valve rod coupling and a valve body, and the valve rod coupling is arranged in the inner cavity of the valve body.

[0007] The torque amplifier includes a worm, a worm gear and an operation connection ring, and both the worm and the worm gear and the valve stem coupling are arranged in the inner cavity of the torque amplifier. The operation connection ring includes an operation tube and a torque ring;

[0008] The driving mechanism includes an electric control housing, a human-machine interaction screen, an electric control component, an electric driver and an operation handwheel. The human-machine interaction screen is arranged at the rear side above the electric control housing, and the electric control component is arranged in the inner cavity of the electric control housing. The electric driver is installed above the electric control housing, and the operation handwheel is arranged on the front surface of the electric control housing.

[0009] Preferably, the transmission rod is made of an external carbon fiber and an internal epoxy resin composite material. The transmission rod is assembled in a segmented manner, and the middle joint of the transmission rod adopts a fixing method of a U-shaped groove and a pin.

[0010] Preferably, the human-machine interaction screen, the electric control component and the electric driver are all powered by rechargeable batteries.

[0011] Preferably, an I-shaped support base is installed at the bottom of the support frame, and universal wheels are installed around the bottom of the I-shaped support base.

[0012] Preferably, the input shaft of the torque amplifier is fixed by a valve stem coupling clamping screw. The other end of the input shaft of the torque amplifier is connected to the torque ring, and inclined surfaces are arranged on both sides of the torque ring.

[0013] Preferably, the electric driver adopts an 86-type high-torque stepping motor and a two-stage planetary reducer.

[0014] Preferably, the overall weight of the driving mechanism is 20 kg. The back of the driving mechanism is connected to the front surface of the transmission rod through the operation connection ring. The number of the operation connection rings is two, and both are arranged on the front side and the rear side of the transmission rod.

[0015] Compared with the related technology, a long-distance manual and electric integrated emergency oil draining device provided by the present invention has the following beneficial effects:

[0016] The present invention provides a long-distance manual and electric integrated emergency oil draining device. Through the design of an electric driver and an operation handwheel, two operation modes of electric and manual are provided. During electric operation, the operator can electrically drive and open or close the transformer valve body with one key through the visual human-machine interaction screen. The electric driver is powered by a rechargeable battery. The electric driver adopts an 86-type high-torque stepping motor and is used in combination with a 1:10 two-stage planetary reducer with a rotational speed of 3000 rpm, that is, 22.5 * 60 / (3000 / 10) = 4.5S. Considering the start-up, acceleration and deceleration time, it takes about 7 seconds to open or close the transformer valve body. During manual operation, the operator rotates the operation handwheel 22.5 circles to open or close the transformer valve body, and the operating force is 48 N.

[0017] The present invention provides a long-distance manual-automatic integrated emergency oil drainage device. The transmission rod is mainly used to transmit the torque of the remote operation to the torque amplifier. A free-angle fault-tolerant guiding docking method is adopted between the transmission rod and the torque amplifier to ensure that the transmission rod can be fixed to one side of the torque amplifier during emergency use. At the same time, an anti-drop measure is used to prevent the operation connecting ring from falling off during use. The driving mechanism is installed at the end of the transmission rod during use, and its function is to provide energy to ensure the reliability of the driving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a preferred embodiment of a long-distance manual-automatic integrated emergency oil drainage device provided by the present invention;

[0019] Figure 2 It is a schematic structural diagram of the torque amplifier and the transformer valve body of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the driving mechanism and the support frame of the present invention.

[0021] Reference numerals: 1, transmission rod; 2, torque amplifier; 3, I-shaped support base; 4, transformer valve body; 5, support frame; 6, driving mechanism; 7, operating handwheel; 8, valve body; 9, human-machine interaction screen; 10, electric driver; 11, operation connecting ring; 12, electric control housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1:

[0024] Please refer to Figures 1-3 , the present invention provides a technical solution: a long-distance manual-automatic integrated emergency oil drainage device, including a transmission rod 1, a torque amplifier 2, a transformer valve body 4, a support frame 5 and a driving mechanism 6. The transformer valve body 4 is arranged at the rear side of the transmission rod 1, the torque amplifier 2 is arranged on the top of the transformer valve body 4, the driving mechanism 6 is installed on the front side of the transmission rod 1, the driving mechanism 6 is installed above the support frame 5, the transformer valve body 4 includes a valve rod coupling and a valve body 8, and the valve rod coupling is arranged in the inner cavity of the valve body 8;

[0025] The torque amplifier 2 includes a worm, a worm gear and an operating connection ring 11, and both the worm and the worm gear and the valve stem coupling are arranged in the inner cavity of the torque amplifier 2. The operating connection ring 11 includes an operating tube and a torque ring;

[0026] The drive mechanism 6 includes an electric control housing 12, a human-machine interaction screen 9, an electric control component, an electric driver 10 and an operating handwheel 7. The human-machine interaction screen 9 is arranged at the rear side above the electric control housing 12, and the electric control component is arranged in the inner cavity of the electric control housing 12. The electric driver 10 is installed above the electric control housing 12, and the operating handwheel 7 is arranged on the front surface of the electric control housing 12.

[0027] In this implementation scheme, through calculation, the torque required for the operator to manually operate is 1600 / 60*1.5*0.8*0.98*0.98*0.97 = 24 N·m, and the diameter of the operating handle is 0.5 m. Therefore, the actual operating terminal force is: F = 24 N·m / 0.5 m = 48 N. The operator rotates the handle 22.5 circles in both forward and reverse directions, and 60X1.5 / 4 can open and close the oil drain valve. The main function of the transmission rod 1 is to transmit the torque of the remote operation to the torque amplifier 2. A free-angle fault-tolerant guiding docking method is adopted between the transmission rod 1 and the torque amplifier 2 to ensure that the transmission rod 1 can be fixed to one side of the torque amplifier 2 during emergency use. At the same time, anti-dropping measures are used to prevent the operating connection ring 11 from falling off during use. The transmission rod 1 supports remote operation at any position within 90° in the horizontal direction and 60° in the vertical direction to meet the application of complex on-site working conditions. The transmission rod 1 is made of an outer carbon fiber + inner epoxy resin composite material, which has bending and torsion resistance. At the same time, it can be used in high-temperature places above 3000°C. In addition, the transmission rod 1 is assembled in sections, each section is 1.5 meters long and weighs 0.7 kg. The length of the transmission rod 1 is designed according to actual needs. The intermediate joint adopts a fixed method of U-shaped groove + pin to ensure no looseness and no slipping during the opening and closing process of the transformer valve body 4;

[0028] The drive mechanism 6 is installed at the end of the transmission rod 1 during use, and its function is to provide energy. To ensure the reliability of the drive mechanism 6, the electric driver 10 and the operating handwheel 7 are designed into two operating modes: electric and manual. During electric operation, the operator can switch the transformer valve body 4 with one key through the visual human-machine interaction screen 9. The electric driver 10 is powered by a rechargeable battery. The electric driver 10 uses an 86-type high-torque stepping motor and is used in conjunction with a 1:10 two-stage planetary reducer, with a speed of 3000 rpm, that is, 22.5*60 / (3000 / 10) = 4.5S. Considering the start-up acceleration and deceleration time, it takes about 7 seconds to open or close the transformer valve body 4. During manual operation, the operator rotates the operating handwheel 7 22.5 circles to switch the transformer valve body 4, and the operating force is 48 N.

[0029] Embodiment 2:

[0030] Please refer to Figures 1-3 As shown, on the basis of Embodiment 1, the present invention provides a technical solution: the transmission rod 1 is made of an external carbon fiber and an internal epoxy resin composite material. The transmission rod 1 is made by segmented assembly. The middle joint of the transmission rod 1 adopts a fixing method of a U-shaped groove and a pin. The human-computer interaction screen 9, the electronic control component, and the electric driver 10 are all powered by rechargeable batteries. An I-shaped support base 3 is installed at the bottom of the support frame 5. Universal wheels are installed around the bottom of the I-shaped support base 3. The input shaft of the torque amplifier 2 is fixed by a valve stem coupling clamping screw. The other end of the input shaft of the torque amplifier 2 is connected to a torque ring, and inclined surfaces are provided on both sides of the torque ring. The electric driver 10 adopts an 86-type high-torque stepping motor and a two-stage planetary reducer. The overall weight of the driving mechanism 6 is 20 kg. The back of the driving mechanism 6 is connected to the front of the transmission rod 1 through an operation connection ring 11. The number of operation connection rings 11 is two, and both are arranged on the front and back sides of the transmission rod 1.

[0031] In this embodiment: the overall weight of the driving mechanism 6 is 20 kg. The support frame 5 is an adjustable support rod, and the support height of the support rod is 0.5 m to 0.9 m. The I-shaped support base 3 is configured with universal wheels at the bottom, which is convenient for moving the device and transferring the device. The transmission rod 1 and related driving components are stored in a portable hand toolbox. When there is an emergency oil drainage requirement, the operator can quickly reach the site with the toolbox in hand and perform simple assembly and docking to quickly complete the oil drainage work. In addition to manual operation, in order to make the control more convenient, redundant electronic control means are designed. The stepping motor is used in conjunction with a 1:10 two-stage planetary reducer. The rated load at the end of the combination should be designed to be higher than 24 N·m, and the transmission efficiency is 0.9. The rated speed of the stepping motor is designed to be 3000 rpm. Among them, the rated speed of the combination is 3000 / 10 = 300 rpm, that is, (22.5 * 60) / 300 = 4.5 s. If the electric scheme is used, it only takes 4.5 s to open or close the transformer valve body 4;

[0032] When determining the parameters of the main torque amplifier 2, the number of worm heads z1 = 1 and the number of worm gear teeth z2 = 60 are selected. The transmission rod 1 is one of the most important transmission components in the transmission system. The material selection should have sufficient strength and stiffness to transmit torque and bear bending moment. The diameter calculation of the transmission rod 1 should be based on the load-bearing situation of the pipe and determined according to its strength condition. When the main shaft only bears torque, its strength condition is:

[0033]

[0034] According to the above formula, the diameter of the shaft of the transmission rod 1 can be roughly estimated. However, for the main shaft that bears both torque and bending moment, generally, the diameter of the shaft section subjected to torsion is estimated based on the torque transmitted by the shaft, and this is used as a preliminary reference for the shaft diameter design. According to the above formula, the allowable shear stress of the shaft material is appropriately reduced to make up for the influence of the bending moment on the shaft. Thus, the following design formula can be obtained:

[0035]

[0036] Through the above design method, the reliability and service life of the main shaft under complex working conditions can be ensured.

[0037] The working principle of a long-distance manual-automatic integrated emergency oil drainage device provided by the present invention is as follows:

[0038] Implementation steps of the first innovation point:

[0039] The first step: After calculation, the torque required for the operator to manually operate is 1600 / 60 * 1.5 * 0.8 * 0.98 * 0.98 * 0.97 = 24 N·m, and the diameter of the operating handle is 0.5 m. Therefore, the actual operating terminal force is: F = 24 N·m / 0.5 m = 48 N. The operator rotates the handle 22.5 circles in both forward and reverse directions (60X1.5 / 4) to open and close the oil drain valve. The main function of the transmission rod 1 is to transmit the torsion of the remote operation to the torsion amplifier 2. A free-angle fault-tolerant guiding docking method is adopted between the transmission rod 1 and the torsion amplifier 2 to ensure that the transmission rod 1 can be fixed to one side of the torsion amplifier 2 during emergency use. At the same time, anti-detachment measures are used to prevent the operation connection ring 11 from falling off during use;

[0040] The second step: The transmission rod 1 supports remote operation at any position of 90° in the horizontal direction and 60° in the vertical direction to meet the application of complex on-site working conditions. The transmission rod 1 is made of outer carbon fiber + inner epoxy resin composite material, which has bending and torsion resistance. At the same time, it can be used in high-temperature places above 3000°C. In addition, the transmission rod 1 is assembled in sections, each section is 1.5 meters long and weighs 0.7 kg. The length of the transmission rod 1 is designed according to actual needs. The intermediate joint adopts a fixed method of U-shaped groove + pin to ensure no looseness and no slipping during the opening and closing process of the transformer valve body 4;

[0041] The third step: The driving mechanism 6 is installed at the end of the transmission rod 1 during use, and its function is to provide energy. To ensure the reliability of the driving mechanism 6, the electric driver 10 and the operating handwheel 7 are designed into two operating modes: electric and manual. During electric operation, the operator can electrically drive and one-key switch the transformer valve body 4 through the visual human-machine interaction screen 9;

[0042] Fourth step: The electric driver 10 is powered by a rechargeable battery. The electric driver 10 uses a large-torque stepper motor of type 86, which is used in conjunction with a 1:10 two-stage planetary reducer. The rotational speed is 3000 rpm, that is, 22.5 * 60 / (3000 / 10) = 4.5S. Considering the start-up, acceleration, and deceleration time, it takes about 7 seconds to open or close the transformer valve body 4. When operating manually, the operator rotates the handwheel 7 for 22.5 turns to switch the transformer valve body 4, and the operating force is 48N.

[0043] Implementation steps of the second innovation point:

[0044] First step: The overall weight of the driving mechanism 6 is 20 kg. The support frame 5 is an adjustable support rod, and the support height of the support rod is 0.5 meters to 0.9 meters. The bottom of the I-shaped support seat 3 is equipped with universal wheels, which is convenient for moving the device and transferring it. The transmission rod 1 and related driving components are stored in a portable toolbox. When there is an emergency oil drainage requirement, the operator can quickly reach the site with the toolbox in hand and complete the simple assembly and docking to quickly complete the oil drainage work.

[0045] Second step: In addition to manual operation, to make the operation more convenient, redundant electric control means are designed. The stepper motor is used in conjunction with a 1:10 two-stage planetary reducer. The rated load at the end of the combination should be designed to be higher than 24 N·m, and the transmission efficiency is 0.9. The rated rotational speed of the stepper motor is designed to be 3000 rpm, and the rated rotational speed of the combination is 3000 / 10 = 300 rpm, that is, (22.5 * 60) / 300 = 4.5s. If the electric scheme is used, it only takes 4.5s to open or close the transformer valve body 4.

[0046] Implementation steps of the third innovation point:

[0047] First step: When determining the parameters of the main torque amplifier 2, select the number of worm heads z1 = 1 and the number of worm gear teeth z2 = 60. The transmission rod 1 is one of the most important transmission components in the transmission system. The material selection should have sufficient strength and stiffness to transmit torque and withstand bending moment. The diameter calculation of the transmission rod 1 should be based on the load-bearing situation of the pipe and determined according to its strength condition. When the main shaft only bears torque, its strength condition is:

[0048]

[0049] According to the above formula, the diameter of the transmission rod 1 shaft can be roughly estimated. However, for the main shaft that bears both torque and bending moment, generally, the diameter of the shaft section under torsion is estimated based on the torque transmitted by the shaft, and this is used as a preliminary reference for the shaft diameter design. According to the above formula, the allowable shear stress of the shaft material is appropriately reduced to compensate for the influence of the bending moment on the shaft, and the following design formula can be obtained

[0050]

[0051] Through the above design method, the reliability and service life of the main shaft under complex working conditions can be ensured.

[0052] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. Moreover, this invention is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this invention. And the peripheral controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and this peripheral controller is a conventional known device.

[0053] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0054] Specific examples are applied in this article to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be pointed out that due to the limited nature of written expression, and objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, modifications or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, modifications, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. A long-distance manual and automatic integrated emergency oil drainage device, comprising a transmission rod (1), a torque amplifier (2), a transformer valve body (4), a support frame (5) and a driving mechanism (6), characterized in that: The transformer valve body (4) is arranged at the rear side of the transmission rod (1), the torque amplifier (2) is arranged on the top of the transformer valve body (4), the driving mechanism (6) is installed on the front side of the transmission rod (1), the driving mechanism (6) is installed above the support frame (5), the transformer valve body (4) includes a valve stem coupling and a valve body (8), and the valve stem coupling is arranged in the inner cavity of the valve body (8); The torque amplifier (2) includes a worm, a worm gear and an operation connection ring (11), and the worm, the worm gear and the valve stem coupling are all arranged in the inner cavity of the torque amplifier (2), and the operation connection ring (11) includes an operation tube and a torque ring; The driving mechanism (6) includes an electric control housing (12), a human-computer interaction screen (9), an electric control component, an electric driver (10) and an operation handwheel (7), the human-computer interaction screen (9) is arranged at the rear side above the electric control housing (12), and the electric control component is arranged in the inner cavity of the electric control housing (12), the electric driver (10) is installed above the electric control housing (12), and the operation handwheel (7) is arranged on the front surface of the electric control housing (12).

2. The long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, The transmission rod (1) is made of an external carbon fiber and an internal epoxy resin composite material, the transmission rod (1) is made by segmented assembly, and the middle joint of the transmission rod (1) adopts a fixing method of a U-shaped groove and a plug pin.

3. The long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, The human-computer interaction screen (9), the electric control component and the electric driver (10) are all powered by rechargeable batteries.

4. The long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, An I-shaped support base (3) is installed at the bottom of the support frame (5), and universal wheels are installed around the bottom of the I-shaped support base (3).

5. A long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, The input shaft of the torque amplifier (2) is fixed by a valve stem coupling clamping screw, the other end of the input shaft of the torque amplifier (2) is connected to the torque ring, and inclined surfaces are arranged on both sides of the torque ring.

6. The long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, The electric driver (10) adopts an 86-type high-torque stepping motor and a two-stage planetary reducer.

7. The long-distance manual-automatic integrated emergency oil drainage device according to claim 1, characterized in that, The overall weight of the driving mechanism (6) is 20 kg, the back of the driving mechanism (6) is connected to the front of the transmission rod (1) through the operation connection ring (11), the number of the operation connection rings (11) is two, and both are arranged on the front side and the rear side of the transmission rod (1).

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