Flow control device for oil injection and drainage pipeline of transformer

Abstract

The invention discloses a transformer oil injection and drainage pipeline flow control device, and belongs to the technical field of oil-immersed transformers, the transformer oil injection and drainage pipeline flow control device comprises a barrel, and a manual flow control assembly and an automatic flow control assembly are arranged in the barrel; the manual flow control assembly comprises a connecting shaft rotationally connected with the cylinder body, the lower end of the connecting shaft is fixedly connected with a rotating cylinder, a guide hole is formed in the side wall of the rotating cylinder and extends around the peripheral side wall of the rotating cylinder from left to right, and the vertical height of the guide hole is gradually increased from left to right; the automatic flow control assembly comprises a vertical shaft fixedly connected to the inner bottom face of the barrel, the vertical shaft is sleeved with a sliding barrel in a sliding mode, the upper end of the sliding barrel extends into the rotating barrel, and a flow guide assembly is fixedly arranged at the upper end of the sliding barrel. According to the emitting device, the flow of oil and the elastic force of the elastic assembly can reach a balance point, and self-adaptive adjustment can be carried out as long as the flow of the oil is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil-immersed transformers, and particularly relates to a flow control device for the oil injection and drainage pipeline of a transformer. Background Art

[0002] The structural composition of an oil-immersed transformer includes: an iron core, which is stacked by silicon steel sheets with good magnetic conductivity to form a magnetic flux closed loop and is the main body of the magnetic circuit of the transformer. It is divided into core type and shell type. The core type iron core widely used at present is composed of a core column and a yoke, and there are cooling oil channels inside. Windings: Also known as coils, they are the conductive circuits of the transformer. They are wound into multiple layers of cylindrical shapes using copper or aluminum wires. The primary and secondary windings are concentrically sleeved on the core column, with the low-voltage winding inside and the high-voltage winding outside, and there is insulating material between them. Oil tank: It is the outer shell of the oil-immersed transformer, used to hold oil and install other components, and is mostly made of steel plates welded together. Voltage regulating device: Used to ensure the stability of the secondary voltage of the transformer, divided into on-load voltage regulating device and off-load voltage regulating device. By adjusting the tap changer of the transformer, it can adapt to the change of the power supply voltage. Radiator: Installed on the oil tank wall, connected to the oil tank through pipelines, and uses the convection of oil to cool the hot oil at the upper part of the transformer and then flow back to the oil tank to reduce the oil temperature. Self-cooling, forced air cooling, and forced water cooling can be used to improve the cooling effect. Oil conservator: Also known as an oil tank, it leaves a buffer space for the thermal expansion and contraction of oil, keeps the oil tank always full of oil, and at the same time reduces the contact area between oil and air, slowing down the oxidation of oil. Gas relay: Also known as a gas-operated relay, it is the main protection device for internal faults of the transformer. It is installed in the middle of the connecting pipeline between the oil tank and the oil conservator. When a fault occurs inside the transformer, it can connect the circuit breaker tripping circuit or the fault signal circuit. Insulating bushing: Located on the top cover of the transformer oil tank, generally made of porcelain insulating bushings, which keep the leads of the high- and low-voltage windings well insulated from the oil tank and fix the leads. Explosion-proof pipe: Also known as a safety airway, it is installed on the oil tank, and the outlet is sealed with a glass explosion-proof film. When a serious fault occurs inside the transformer and the gas relay fails, the gas inside the oil tank can break through the glass explosion-proof film and spray out from the safety airway to prevent the transformer from exploding. The working principle is the electromagnetic induction principle, that is, an alternating magnetic field is generated in the iron core through an alternating current, so that an induced electromotive force is generated in the winding, thereby realizing voltage transformation. At the same time, the insulating and heat-conducting properties of transformer oil are utilized to ensure the normal operation of the transformer.

[0003] When an oil-immersed transformer is being overhauled, it is usually necessary to perform oil injection and drainage operations. For the oil injection and drainage operations, an oil filter is required to drain the old oil in the transformer, and after filtering and purification, it is re-injected into the transformer. Clean insulating oil can improve the withstand voltage ability of the transformer, improve the cooling and arc extinguishing effects, and ensure the long-term stable operation of the transformer. The existing flow control devices for the oil injection and drainage pipelines all manually adjust the flow rate and cannot adaptively adjust the flow rate.

[0004] The purpose of this invention is to overcome the deficiencies of the prior art and provide a flow control device for the transformer oil injection and drainage pipeline, which solves the problems in the above-mentioned background technology.

[0005] The purpose of this invention is achieved as follows: A flow control device for the transformer oil injection and drainage pipeline includes a cylinder body, and a manual flow control component and an automatic flow control component are arranged inside the cylinder body; the manual flow control component includes a connecting shaft rotatably connected to the cylinder body, a rotating cylinder is fixedly connected to the lower end of the connecting shaft, a guiding hole is formed in the side wall of the rotating cylinder, the guiding hole extends around the circumferential side wall of the rotating cylinder from left to right, and the vertical height of the guiding hole gradually increases from left to right; the automatic flow control component includes a vertical shaft fixedly connected to the inner bottom surface of the cylinder body, a sliding cylinder is slidably sleeved outside the vertical shaft, the upper end of the sliding cylinder extends into the inside of the rotating cylinder, a guiding flow component is fixedly arranged at the upper end of the sliding cylinder, the sliding cylinder is in clearance fit with the inner bottom surface of the rotating cylinder, a bearing plate is fixedly arranged at the lower end of the sliding cylinder, an elastic component is connected to the lower end of the bearing plate, and the elastic component is fixedly arranged on the inner bottom surface of the cylinder body. When in use, rotating the connecting shaft can drive the rotating cylinder to rotate, thereby adjusting the position of the guiding hole, and realizing the manual adjustment of the oil flow rate by using the change of the guiding hole position. Through the setting of the automatic flow control component, when the oil flows above the guiding flow component, if the oil flow rate is large, the weight of the oil itself is large, and under the action of the gravity of the oil, the sliding cylinder slides down along the vertical shaft. At this time, the elastic component is compressed, and the gap between the guiding hole and the guiding flow component becomes smaller, and the oil flow rate automatically becomes smaller, realizing the adaptive adjustment of the oil flow rate. If the oil becomes smaller, the gravity of the oil is less than the elastic force of the elastic component. At this time, the elastic component drives the sliding cylinder to rise along the vertical shaft, and finally the oil flow rate reaches an equilibrium point with the elastic force of the elastic component. As long as the oil flow rate becomes larger, adaptive adjustment is carried out.

[0006] Further, a backing plate is fixedly arranged on the inner bottom surface of the cylinder body, and the lower end of the vertical shaft is fixedly connected to the middle position of the backing plate; the elastic component is a spring, the upper end of the spring is fixedly connected to the lower surface of the bearing plate, the lower end of the spring is fixedly connected to the upper surface of the backing plate, the spring is sleeved outside the vertical shaft, and the spring does not contact the vertical shaft. When in use, the vertical shaft plays a guiding and supporting role. When the sliding cylinder moves downward, the spring is compressed, and when the spring resets, the vertical cylinder moves upward.

[0007] Further, the guiding flow component includes a circular plate fixedly connected to the upper end of the sliding cylinder, a first plate, a second plate, a third plate and a fourth plate are fixedly connected to the upper surface of the circular plate, and the included angle between adjacent plates of the first plate, the second plate, the third plate and the fourth plate is 90°. The first plate, the second plate, the third plate and the fourth plate are all rectangular plates. The settings of the first plate, the second plate, the third plate and the fourth plate are used to cooperate with the guiding hole to adjust the oil flow rate.

[0008] Further, a plurality of cylinder grooves are formed in the inner circumference of the sleeve, and a plurality of shaft protrusions are fixedly arranged on the outer circumference of the vertical shaft. The shaft protrusions are slidably matched with the cylinder grooves. Through the mutual cooperation and connection of the shaft protrusions and the cylinder grooves, the sleeve is prevented from tilting when it moves, improving the moving stability and making the movement smoother. The guide hole includes a tapered portion and an equal-orifice portion. The tapered portion includes a horizontal cross-section and an arc cross-section. The right end of the horizontal cross-section is butted against the lower cross-section of the equal-orifice portion, and the arc cross-section is butted against the upper cross-section of the equal-orifice portion. The equal-orifice portion is rectangular. Through the setting of the tapered portion, the aperture size of the guide hole is changed steplessly, and thus the oil flow rate is adjusted steplessly.

[0009] Further, the upper end of the connecting shaft penetrates upward through the top wall of the cylinder body and extends to the outside above the cylinder body. The connecting shaft is rotatably connected to the top wall of the cylinder body through a deep groove ball bearing. The upper end of the connecting shaft is fixedly provided with a hexagonal portion, and a hexagonal groove opening is formed in the upper end of the hexagonal portion. Through the setting of the deep groove ball bearing, the rolling elements and the raceway of the deep groove ball bearing are in point contact, with a small friction coefficient, which can effectively reduce energy loss and improve efficiency. Its structure consists of an inner ring, an outer ring, rolling elements and a cage, and is relatively simple compared with other types of bearing structures. This simple structure makes the manufacturing process relatively easy, with a low cost. At the same time, it is also convenient for installation and disassembly, and maintenance is relatively easy. It can bear radial loads and a certain axial load. Under normal working conditions, the deep groove ball bearing has a long service life, and the raceway and rolling elements have good wear resistance and fatigue resistance, and can withstand long-term load action without premature failure. The noise generated during operation is relatively low.

[0010] Further, an oil inlet pipe is communicated with the left end of the cylinder body, and an oil outlet pipe is communicated with the right end of the cylinder body. An inclined channel is arranged inside the oil inlet pipe, and the inner end of the inclined channel corresponds to the rotating cylinder. A flange portion is fixedly arranged at the outer end of the oil inlet pipe, and an oil inlet groove opening is formed in the side wall of the flange portion, and an oil inlet sealing ring is detachably arranged inside the oil inlet groove opening. When in use, if it is necessary to manually adjust the oil flow rate, a wrench is inserted into the hexagonal groove opening to rotate the hexagonal portion, thereby driving the connecting shaft to rotate, and then driving the rotating cylinder to rotate, so as to realize the adjustment of the position change of the guide hole.

[0011] Further, the inner end of the oil outlet pipe corresponds to the automatic flow control assembly. The outer end of the oil outlet pipe is provided with a flanging portion, and a plurality of connecting holes are formed in the flanging portion. A flanging groove is formed in the side wall of the flanging portion, and an oil outlet sealing ring is detachably arranged inside the flanging groove. The cylinder body includes a cylinder body and cylinder top covers and cylinder bottom covers detachably and fixedly connected to the upper and lower ends of the cylinder body respectively; and the cylinder top cover is hermetically connected to the upper end of the cylinder body, and the cylinder bottom cover is hermetically connected to the lower end of the cylinder body.

[0012] Advantages of the present invention: By rotating the connecting shaft, the rotating cylinder can be driven to rotate, thereby adjusting the position of the guide hole, and manually adjusting the oil flow rate by using the change in the position of the guide hole. Through the setting of the automatic flow control component, when the oil fluid flows above the diversion component, if the oil flow rate is large, the weight of the oil fluid itself is large. Under the action of the gravity of the oil fluid, the sliding cylinder slides downward along the vertical shaft. At this time, the elastic component is compressed, and the gap between the guide hole and the diversion component becomes smaller, and the oil flow rate automatically becomes smaller, realizing the adaptive adjustment of the oil flow rate. If the oil fluid becomes smaller, the gravity of the oil fluid is less than the elastic force of the elastic component. At this time, the elastic component drives the sliding cylinder to rise along the vertical shaft, and finally the oil flow rate and the elastic force of the elastic component reach an equilibrium point. As long as the oil flow rate increases, an adaptive adjustment is made. During use, the vertical shaft plays a guiding and supporting role. When the sliding cylinder moves downward, the spring is compressed, and when the spring returns to its original position, the vertical cylinder moves upward. The settings of the first plate, the second plate, the third plate, and the fourth plate are used to cooperate with the guide hole to adjust the oil flow rate. Through the setting of the deep groove ball bearing, the rolling elements and the raceways of the deep groove ball bearing are in point contact, with a small friction coefficient, which can effectively reduce energy loss and improve efficiency. Its structure consists of an inner ring, an outer ring, rolling elements, and a cage, and is relatively simple in structure and low in cost compared with other types of bearings. Through the setting of the gradual change part, the aperture of the guide hole is changed steplessly, and then the oil flow rate is adjusted steplessly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the top view structural schematic diagram of the present invention; Figure 3 is the right view structural schematic diagram of the present invention; Figure 4 is the left top view three-dimensional structural schematic diagram of the present invention; Figure 5 is the right top view three-dimensional structural schematic diagram of the present invention; Figure 6 is the bottom view three-dimensional structural schematic diagram of the present invention; Figure 7 is the internal three-dimensional structural schematic diagram of the present invention; Figure 8 is the Figure 7 enlarged view of A in the present invention; Figure 9 is the sectional three-dimensional structural schematic diagram of the present invention; Figure 10 is the Figure 9 enlarged view of B in the present invention.

[0014] In the figure: 1, cylinder body; 2, connecting shaft; 3, rotating cylinder; 4, guiding hole; 5, vertical shaft; 6, sliding cylinder; 7, bearing plate; 8, backing plate; 9, spring; 10, first plate; 11, second plate; 12, third plate; 13, fourth plate; 14, tapered part; 15, equal-diameter part; 16, horizontal section; 17, hexagonal part; 18, hexagonal notch; 19, oil inlet pipe; 20, oil outlet pipe; 21, inclined channel; 22, flange part; 23, oil inlet notch; 24, flanging part; 25, flanging groove; 26, cylinder top cover; 27, cylinder bottom cover; 28, circular plate. Detailed implementation mode

[0015] The following further describes the present invention in conjunction with the attached drawings. It should be noted that all azimuth terms such as up and down, front and back, left and right that appear in the present invention are azimuth terms made with Figure 1 the reference drawing as a reference, and all azimuth terms do not limit the present invention, but are only for clearer description and explanation of the present invention. Embodiment

[0016] As Figures 1 - 10 shown, this embodiment discloses a flow control device for a transformer oil injection and drainage pipeline, which includes a cylinder body 1, and a manual flow control component and an automatic flow control component are arranged inside the cylinder body 1; the manual flow control component includes a connecting shaft 2 rotatably connected to the cylinder body 1, the lower end of the connecting shaft 2 is fixedly connected with a rotating cylinder 3, a guiding hole 4 is opened on the side wall of the rotating cylinder 3, the guiding hole 4 extends around the circumferential side wall of the rotating cylinder 3 from left to right, and the vertical height of the guiding hole 4 gradually increases from left to right; the automatic flow control component includes a vertical shaft 5 fixedly connected to the inner bottom surface of the cylinder body 1, a sliding cylinder 6 is slidably sleeved outside the vertical shaft 5, the upper end of the sliding cylinder 6 extends into the inside of the rotating cylinder 3, a flow guiding component is fixedly arranged at the upper end of the sliding cylinder 6, the sliding cylinder 6 is in clearance fit with the inner bottom surface of the rotating cylinder 3, a bearing plate 7 is fixedly arranged at the lower end of the sliding cylinder 6, an elastic component is connected to the lower end of the bearing plate 7, and the elastic component is fixedly arranged on the inner bottom surface of the cylinder body 1. When in use, by rotating the connecting shaft 2, the rotating cylinder 3 can be driven to rotate, and then the position of the guiding hole 4 can be adjusted, and the manual adjustment of the oil flow rate is realized by using the change of the position of the guiding hole 4. Through the setting of the automatic flow control component, when the oil liquid flows above the flow guiding component, if the oil flow rate is large, the weight of the oil liquid itself is large, and under the action of the gravity of the oil liquid, the sliding cylinder 6 slides down along the vertical shaft 5. At this time, the elastic component is compressed, and the gap between the guiding hole 4 and the flow guiding component becomes smaller, and the oil liquid flow rate automatically becomes smaller, realizing the adaptive adjustment of the oil liquid flow rate. If the oil liquid becomes smaller, the gravity of the oil liquid is less than the elastic force of the elastic component. At this time, the elastic component drives the sliding cylinder 6 to rise along the vertical shaft 5, and finally the oil liquid flow rate and the elastic force of the elastic component reach an equilibrium point. As long as the oil liquid flow rate becomes larger, the adaptive adjustment is carried out. Embodiment

[0017] As Figures 1 - 10 shown, this embodiment discloses a flow control device for a transformer oil injection and drainage pipeline, which includes a cylinder body 1, and a manual flow control component and an automatic flow control component are arranged inside the cylinder body 1; the manual flow control component includes a connecting shaft 2 rotatably connected to the cylinder body 1, a rotating cylinder 3 is fixedly connected to the lower end of the connecting shaft 2, a guide hole 4 is formed in the side wall of the rotating cylinder 3, the guide hole 4 extends around the circumferential side wall of the rotating cylinder 3 from left to right, and the vertical height of the guide hole 4 gradually increases from left to right; the automatic flow control component includes a vertical shaft 5 fixedly connected to the inner bottom surface of the cylinder body 1, a sliding cylinder 6 is slidably sleeved outside the vertical shaft 5, the upper end of the sliding cylinder 6 extends into the inside of the rotating cylinder 3, a guide flow component is fixedly arranged at the upper end of the sliding cylinder 6, the sliding cylinder 6 is in clearance fit with the inner bottom surface of the rotating cylinder 3, a bearing plate 7 is fixedly arranged at the lower end of the sliding cylinder 6, an elastic component is connected to the lower end of the bearing plate 7, and the elastic component is fixedly arranged on the inner bottom surface of the cylinder body 1. When in use, the rotating cylinder 3 can be driven to rotate by rotating the connecting shaft 2, so as to adjust the position of the guide hole 4, and the manual adjustment of the oil flow rate is realized by using the change of the position of the guide hole 4. Through the setting of the automatic flow control component, when the oil liquid flows above the guide flow component, if the oil flow rate is large, the weight of the oil liquid itself is large, and under the action of the gravity of the oil liquid, the sliding cylinder 6 slides down along the vertical shaft 5. At this time, the elastic component is compressed, and the gap between the guide hole 4 and the guide flow component becomes smaller, and the oil liquid flow rate automatically becomes smaller, realizing the adaptive adjustment of the oil liquid flow rate. If the oil liquid becomes smaller, the gravity of the oil liquid is less than the elastic force of the elastic component. At this time, the elastic component drives the sliding cylinder 6 to rise along the vertical shaft 5, and finally the oil liquid flow rate reaches an equilibrium point with the elastic force of the elastic component. As long as the oil liquid flow rate becomes larger, the adaptive adjustment is carried out.

[0018] For better effect, a backing plate 8 is fixedly arranged on the inner bottom surface of the cylinder body 1, and the lower end of the vertical shaft 5 is fixedly connected to the middle position of the backing plate 8; the elastic component is a spring 9, the upper end of the spring 9 is fixedly connected to the lower surface of the bearing plate 7, the lower end of the spring 9 is fixedly connected to the upper surface of the backing plate 8, the spring 9 is sleeved outside the vertical shaft 5, and the spring 9 does not contact the vertical shaft 5. When in use, the vertical shaft 5 plays a guiding and supporting role. When the sliding cylinder 6 moves downward, the spring 9 is compressed, and when the spring 9 resets, the vertical cylinder moves upward.

[0019] For better effect, the diversion assembly includes a circular plate 28 fixedly connected to the upper end of the sliding cylinder 6. The upper surface of the circular plate 28 is fixedly connected with a first plate 10, a second plate 11, a third plate 12 and a fourth plate 13, and the included angle between adjacent plates of the first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 is 90°. The first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 are all rectangular plates. The settings of the first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 are used to adjust the oil flow rate in cooperation with the guide holes 4.

[0020] For better effect, a plurality of cylinder grooves are formed in the inner circumference of the sleeve, and a plurality of shaft protrusions are fixedly arranged on the outer circumference of the vertical shaft 5. The shaft protrusions are slidably matched with the cylinder grooves; through the mutual cooperation and connection of the shaft protrusions and the cylinder grooves, the sleeve is prevented from deflecting when the sleeve moves, the moving stability is improved, and the movement is smoother. The guide hole 4 includes a gradual change portion 14 and an equal orifice portion 15. The gradual change portion 14 includes a horizontal cross-section 16 and an arc cross-section. The right end of the horizontal cross-section 16 is butted against the lower cross-section of the equal orifice portion 15, and the arc cross-section is butted against the upper cross-section of the equal orifice portion 15. The equal orifice portion 15 is rectangular. Through the setting of the gradual change portion 14, the aperture of the guide hole 4 is changed steplessly, and further the oil flow rate is adjusted steplessly.

[0021] For better effect, the upper end of the connecting shaft 2 penetrates upward through the top wall of the cylinder body 1 and extends to the outside above the cylinder body 1. The connecting shaft 2 is rotatably connected to the top wall of the cylinder body 1 through a deep groove ball bearing. The upper end of the connecting shaft 2 is fixedly provided with a hexagonal portion 17, and a hexagonal groove opening 18 is formed at the upper end of the hexagonal portion 17. Through the setting of the deep groove ball bearing, the rolling elements and the raceways of the deep groove ball bearing are in point contact, the friction coefficient is small, the energy loss can be effectively reduced, and the efficiency can be improved. Its structure consists of an inner ring, an outer ring, rolling elements and a cage, and the structure is relatively simple compared with other types of bearings. This simple structure makes the manufacturing process relatively easy, the cost is low, and it is also convenient for installation and disassembly, and the maintenance is relatively convenient. It can bear radial loads and a certain axial load. Under normal working conditions, the deep groove ball bearing has a long service life, and the raceways and rolling elements have good wear resistance and fatigue resistance, and can bear long-term loads without premature failure. The noise generated during operation is relatively low. Embodiment

[0022] As Figures 1 - 10As shown in the figure, this embodiment discloses a flow control device for a transformer oil injection and drainage pipeline, which includes a cylinder body 1. A manual flow control component and an automatic flow control component are arranged inside the cylinder body 1. The manual flow control component includes a connecting shaft 2 rotatably connected to the cylinder body 1. A rotating cylinder 3 is fixedly connected to the lower end of the connecting shaft 2. A guide hole 4 is formed in the side wall of the rotating cylinder 3. The guide hole 4 extends around the circumferential side wall of the rotating cylinder 3 from left to right, and the vertical height of the guide hole 4 gradually increases from left to right. The automatic flow control component includes a vertical shaft 5 fixedly connected to the inner bottom surface of the cylinder body 1. A sliding cylinder 6 is slidably sleeved outside the vertical shaft 5. The upper end of the sliding cylinder 6 extends into the inside of the rotating cylinder 3. A guide flow component is fixedly arranged at the upper end of the sliding cylinder 6. The sliding cylinder 6 is in clearance fit with the inner bottom surface of the rotating cylinder 3. A bearing plate 7 is fixedly arranged at the lower end of the sliding cylinder 6. An elastic component is connected to the lower end of the bearing plate 7. The elastic component is fixedly arranged on the inner bottom surface of the cylinder body 1. When in use, the rotating cylinder 3 can be driven to rotate by rotating the connecting shaft 2, and then the position of the guide hole 4 is adjusted. The manual adjustment of the oil flow rate is realized by the change of the position of the guide hole 4. Through the setting of the automatic flow control component, when the oil flows above the guide flow component, if the oil flow rate is large, the weight of the oil itself is large. Under the action of the gravity of the oil, the sliding cylinder 6 slides down along the vertical shaft 5. At this time, the elastic component is compressed, and the gap between the guide hole 4 and the guide flow component becomes smaller, and the oil flow rate automatically becomes smaller, realizing the adaptive adjustment of the oil flow rate. If the oil becomes smaller, the gravity of the oil is less than the elastic force of the elastic component. At this time, the elastic component drives the sliding cylinder 6 to rise along the vertical shaft 5, and finally the oil flow rate and the elastic force of the elastic component reach an equilibrium point. As long as the oil flow rate becomes larger, the adaptive adjustment is carried out.

[0023] For better effect, a backing plate 8 is fixedly arranged on the inner bottom surface of the cylinder body 1. The lower end of the vertical shaft 5 is fixedly connected to the middle position of the backing plate 8. The elastic component is a spring 9. The upper end of the spring 9 is fixedly connected to the lower surface of the bearing plate 7. The lower end of the spring 9 is fixedly connected to the upper surface of the backing plate 8. The spring 9 is sleeved outside the vertical shaft 5, and the spring 9 does not contact the vertical shaft 5. When in use, the vertical shaft 5 plays a guiding and supporting role. When the sliding cylinder 6 moves downward, the spring 9 is compressed. When the spring 9 resets, the vertical cylinder moves upward.

[0024] For better effect, the guide flow component includes a circular plate 28 fixedly connected to the upper end of the sliding cylinder 6. A first plate 10, a second plate 11, a third plate 12 and a fourth plate 13 are fixedly connected to the upper surface of the circular plate 28. The included angle between adjacent plates of the first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 is 90°. The first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 are all rectangular plates. The settings of the first plate 10, the second plate 11, the third plate 12 and the fourth plate 13 are used to cooperate with the guide hole 4 to adjust the oil flow rate.

[0025] For better effect, a plurality of cylinder grooves are provided in the inner circumference of the sleeve, and a plurality of shaft protrusions are fixedly arranged on the outer circumference of the vertical shaft 5, and the shaft protrusions are slidably matched with the cylinder grooves; through the mutual cooperation and connection of the shaft protrusions and the cylinder grooves, the sleeve is prevented from deflecting when the sleeve moves, the moving stability is improved, and the movement is smoother. The guide hole 4 includes a gradual change portion 14 and an equal orifice portion 15. The gradual change portion 14 includes a horizontal cross-section 16 and an arc cross-section. The right end of the horizontal cross-section 16 is butted against the lower cross-section of the equal orifice portion 15, and the arc cross-section is butted against the upper cross-section of the equal orifice portion 15. The equal orifice portion 15 is rectangular. Through the setting of the gradual change portion 14, the aperture of the guide hole 4 is changed steplessly, and thus the oil flow rate is adjusted steplessly.

[0026] For better effect, the upper end of the connecting shaft 2 penetrates upward through the top wall of the cylinder body 1 and extends to the outside above the cylinder body 1. The connecting shaft 2 is rotationally connected to the top wall of the cylinder body 1 through a deep groove ball bearing. A hexagonal portion 17 is fixedly arranged at the upper end of the connecting shaft 2, and a hexagonal groove opening 18 is provided at the upper end of the hexagonal portion 17. Through the setting of the deep groove ball bearing, the rolling elements and the raceway of the deep groove ball bearing are in point contact, the friction coefficient is small, the energy loss can be effectively reduced, and the efficiency can be improved. Its structure consists of an inner ring, an outer ring, rolling elements and a cage, and the structure is relatively simple compared with other types of bearings. This simple structure makes the manufacturing process relatively easy, the cost is low, and it is also convenient for installation and disassembly, and the maintenance is relatively convenient. It can bear radial loads and a certain axial load. Under normal working conditions, the deep groove ball bearing has a long service life, and the raceway and rolling elements have good wear resistance and fatigue resistance, and can withstand long-term load action without premature failure. The noise generated during operation is relatively low.

[0027] For better effect, an oil inlet pipe 19 is communicated with the left end of the cylinder body 1, and an oil outlet pipe 20 is communicated with the right end of the cylinder body 1. An inclined channel 21 is arranged inside the oil inlet pipe 19, and the inner end of the inclined channel 21 is arranged corresponding to the rotating cylinder 3. A flange portion 22 is fixedly arranged at the outer end of the oil inlet pipe 19, and an oil inlet groove opening 23 is arranged on the side wall of the flange portion 22. An oil inlet sealing ring is detachably arranged inside the oil inlet groove opening 23. During use, if it is necessary to manually adjust the oil flow rate, a wrench is inserted into the hexagonal groove opening 18, the hexagonal portion 17 is rotated to drive the connecting shaft 2 to rotate, and then the rotating cylinder 3 is driven to rotate, so as to realize the position change adjustment of the guide hole 4.

[0028] For better effect, the inner end of the oil outlet pipe 20 is arranged corresponding to the automatic flow control component, and the outer end of the oil outlet pipe 20 is provided with a flanging part 24. A plurality of connection holes are formed in the flanging part 24, and a flanging groove 25 is formed in the side wall of the flanging part 24. An oil outlet sealing ring is detachably arranged inside the flanging groove 25. The cylinder body 1 includes a cylinder body and cylinder top covers 26 and cylinder bottom covers 27 detachably and fixedly connected to the upper and lower ends of the cylinder body respectively; and the cylinder top cover 26 is hermetically connected to the upper end of the cylinder body, and the cylinder bottom cover 27 is hermetically connected to the lower end of the cylinder body.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A flow control device for a transformer oil injection and drainage pipeline, comprising a cylinder body, characterized in that: A manual flow control component and an automatic flow control component are arranged inside the cylinder body; the manual flow control component includes a connecting shaft rotatably connected to the cylinder body, a rotating cylinder is fixedly connected to the lower end of the connecting shaft, a guide hole is formed in the side wall of the rotating cylinder, the guide hole extends around the circumferential side wall of the rotating cylinder from left to right, and the vertical height of the guide hole gradually increases from left to right; the automatic flow control component includes a vertical shaft fixedly connected to the inner bottom surface of the cylinder body, a sliding cylinder is slidably sleeved outside the vertical shaft, the upper end of the sliding cylinder extends into the inside of the rotating cylinder, a flow guiding component is fixedly arranged at the upper end of the sliding cylinder, the sliding cylinder is in clearance fit with the inner bottom surface of the rotating cylinder, a bearing plate is fixedly arranged at the lower end of the sliding cylinder, and an elastic component is connected to the lower end of the bearing plate, and the elastic component is fixedly arranged on the inner bottom surface of the cylinder body.

2. The flow control device for the transformer oil injection and drainage pipeline according to claim 1, wherein: A backing plate is fixedly arranged on the inner bottom surface of the cylinder body; the lower end of the vertical shaft is fixedly connected to the middle position of the backing plate; the elastic component is a spring, the upper end of the spring is fixedly connected to the lower surface of the bearing plate, the lower end of the spring is fixedly connected to the upper surface of the backing plate, the spring is sleeved outside the vertical shaft, and the spring does not contact the vertical shaft.

3. The flow control device for the transformer oil injection and drainage pipeline according to claim 2, wherein: The flow guiding component includes a circular plate fixedly connected to the upper end of the sliding cylinder, a first plate, a second plate, a third plate and a fourth plate are fixedly connected to the upper surface of the circular plate, and the included angle between adjacent plates of the first plate, the second plate, the third plate and the fourth plate is 90°, and the first plate, the second plate, the third plate and the fourth plate are all rectangular plates.

4. The flow control device for the transformer oil injection and drainage pipeline according to claim 3, wherein: A plurality of cylinder grooves are formed in the circumferential interior of the sleeve, a plurality of shaft protrusions are fixedly arranged on the circumferential outer wall of the vertical shaft, and the shaft protrusions are in sliding fit with the cylinder grooves; the guide hole includes a gradient part and an equal orifice part, the gradient part includes a horizontal section and an arc section, the right end of the horizontal section is butted against the lower section of the equal orifice part, the arc section is butted against the upper section of the equal orifice part, and the equal orifice part is rectangular.

5. The flow control device for the transformer oil injection and drainage pipeline according to claim 1, characterized in that: The upper end of the connecting shaft penetrates upward through the top wall of the cylinder body and extends to the outside above the cylinder body, the connecting shaft is rotatably connected to the top wall of the cylinder body through a deep groove ball bearing, a hexagonal part is fixedly arranged at the upper end of the connecting shaft, and a hexagonal groove opening is formed in the upper end of the hexagonal part.

6. The flow control device for the transformer oil injection and drainage pipeline according to claim 5, characterized in that: An oil inlet pipe is communicated with the left end of the cylinder body, an oil outlet pipe is communicated with the right end of the cylinder body, an inclined channel is arranged inside the oil inlet pipe, the inner end of the inclined channel is arranged corresponding to the rotating cylinder, a flange part is fixedly arranged at the outer end of the oil inlet pipe, an oil inlet groove opening is formed in the side wall of the flange part, and an oil inlet sealing ring is detachably arranged inside the oil inlet groove opening.

7. The flow control device for the transformer oil injection and drainage pipeline according to claim 6, characterized in that: The inner end of the oil outlet pipe is arranged corresponding to the automatic flow control component, a flanging part is arranged at the outer end of the oil outlet pipe, a plurality of connecting holes are formed in the flanging part, a flanging groove is formed in the side wall of the flanging part, and an oil outlet sealing ring is detachably arranged inside the flanging groove.

8. The flow control device for the transformer oil injection and drainage pipeline according to claim 7, characterized in that: The cylinder body includes a cylinder body and cylinder top covers and cylinder bottom covers detachably and fixedly connected to the upper and lower ends of the cylinder body; and the cylinder top cover is hermetically connected to the upper end of the cylinder body, and the cylinder bottom cover is hermetically connected to the lower end of the cylinder body.

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