Vertical external oil metal corrugated oil conservator with pointer type oil level indicator

Abstract

The utility model belongs to the technical field of metal corrugated oil conservators for transformers, and particularly relates to a vertical external oil metal corrugated oil conservator with a pointer type oil level indicator, which is used for protecting and compensating transformer oil, a metal corrugated core body is placed on the upper side in a cylinder body, and a dial type oil level indicator is installed on the outer side of the cylinder body. The expansion and contraction movement of the metal corrugated core body is converted into the rotation of a pointer of the dial plate type oil level gauge through the transmission mechanism, so that the actual oil level is displayed. Compared with a traditional oil conservator, the vertical external oil metal corrugated oil conservator is more reliable in structure, more stable in operation and easy to install, and the service life of the vertical external oil metal corrugated oil conservator is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal corrugated oil conservator for transformers, specifically a vertical external metal corrugated oil conservator with a pointer-type oil level gauge. Background Technology

[0002] The insulating oil inside the transformer enters the oil cavity of the transformer's metal corrugated oil conservator. Through the expansion and contraction of the stainless steel corrugated core inside the conservator's cylinder, it compensates for the volume changes of the insulating oil inside the transformer, thereby achieving the purpose of oil storage.

[0003] Traditional vertical external corrugated oil conservator indicators have many limitations. Typically, the pull rope extends laterally from the dial-type oil level gauge, passing through a corner and connecting to the free end of the corrugated core, thus converting lateral transmission into vertical transmission. If poorly designed, excessive stress can cause the pull rope at the corner to wear easily, and since the rope is generally thin, prolonged wear can lead to breakage. Furthermore, the indicator mechanism of traditional vertical external oil conservator is complex, and this complex structure makes installation and maintenance difficult. Utility Model Content

[0004] In view of the above-mentioned problems with the indicating mechanism of traditional vertical external corrugated oil tanks, the purpose of this utility model is to provide a vertical external corrugated metal oil tank with a pointer-type oil level gauge.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] The device includes a cylindrical body, a corrugated metal core, and a dial-type oil level gauge. The corrugated metal core is located inside the cylindrical body, with its upper end mounted on the cylindrical body and its lower end being a free end. The expansion and contraction direction of the corrugated metal core is vertical. The dial-type oil level gauge is mounted on the cylindrical body. Transformer oil enters the oil cavity formed between the interior of the cylindrical body and the exterior of the corrugated metal core through an oil delivery pipeline connected to the cylindrical body. The device is characterized in that the expansion and contraction motion of the corrugated metal core is transmitted to the pointer shaft of the dial-type oil level gauge via a transmission mechanism. The transmission mechanism includes a coupling, a transmission assembly, a reel device, a rope, a connecting rod, a linear guide rail, and... The sliding seat is slidably connected to the linear guide rail, which is installed at the bottom of the cylinder. The upper end of the connecting rod is connected to the lower end of the corrugated metal core, and the lower end of the connecting rod is connected to the sliding seat. The reel device includes a reel cover plate, a reel shaft, and a reel box. The reel cover plate is sealed to the bottom of the cylinder. The lower end of the reel shaft is fixed to the reel cover plate or is an integral structure. The reel box is installed at the upper end of the reel shaft. One end of the reel is connected to the sliding seat, and the other end of the reel is wound around the reel box. One end of the coupling is connected to the pointer shaft of the dial-type oil level gauge, and the other end of the coupling is connected to the reel box through a transmission assembly.

[0007] Wherein: the reel box is rotatably mounted on the upper end of the reel shaft, and a coil spring is sleeved on the upper end of the reel shaft located inside the reel box, with both ends of the coil spring connected to the reel shaft and the reel box respectively.

[0008] The transmission assembly is a bevel gear set, including bevel gear A and bevel gear B. Bevel gear B is rotatably mounted on the reel shaft and is connected to the reel box. Bevel gear A is connected to the other end of the coupling and meshes with bevel gear B for transmission.

[0009] The lower end of the corrugated metal core is equipped with a seated bearing, and one end of the connecting rod is fixed to the seated bearing; the other end of the connecting rod is connected to one end of a ball joint, and the other end of the ball joint is mounted on a sliding seat.

[0010] The sliding direction of the sliding seat on the linear guide rail is perpendicular to the expansion and contraction direction of the metal corrugated core.

[0011] The linear guide rail is provided with limit blocks at both ends along its length to prevent the sliding seat from derailing.

[0012] The axial centerline of the reel box is perpendicular to the horizontal plane, and the pulling out and retracting directions of the rope are both horizontal.

[0013] A maintenance hole is provided at the bottom of the cylinder, and the reel cover is located outside the maintenance hole and is sealed to the bottom of the cylinder by a sealing ring.

[0014] The bottom of the cylinder is equipped with a breather pipe, an oil injection pipe, and an exhaust pipe. The interior of the corrugated metal core is connected to the outside through the breather pipe. The oil injection pipe is used to inject oil into the oil tank. The upper end of the exhaust pipe extends to the upper part of the cylinder, and the air inside the cylinder is discharged through the exhaust pipe.

[0015] The advantages and positive effects of this utility model are as follows:

[0016] This utility model, through the application of a dial-type oil level gauge and a transmission mechanism, extends the service life of the vertical external metal corrugated oil tank, makes its operation more stable, its structure more reliable, and its installation simpler. Specifically:

[0017] 1. Extended service life: This utility model uses a connecting rod to change the transmission direction of the metal corrugated core. Compared with the traditional vertical external oil tank structure with a pull rope structure, it will not break due to long-term wear of the pull rope, resulting in a longer service life and thus extending the service life of the entire oil tank.

[0018] 2. Smooth Operation: This utility model adopts a linear guide rail. The guide rail and sliding seat of the linear guide rail are precision machined to ensure stability during operation. Due to the use of rolling friction, the coefficient of friction is very low. It is also suitable for high-speed movement and can adapt to sudden changes in the insulating oil level during the use of the oil conservator, making the metal corrugated core run more smoothly.

[0019] 3. Reliable structure: This utility model uses a ball joint with multiple degrees of freedom to eliminate the problem of connecting rod stress caused by the shaking of the metal corrugated core during operation. In addition, a coupling is used to reduce vibration and buffer, improve the stability of the entire system, and fully meet the normal operation requirements of the corrugated core.

[0020] 4. Simple Installation: This utility model adopts a pulley device and a coupling. The pulley device is an integrated unit, and its main function is to adjust the rotation angle of the bevel gear by adjusting the length of the pulley. The internal coil spring pulls the pulley back during the downward stroke of the metal corrugated core. When used in conjunction with the coupling, the coupling compensates for any misalignment or error that may occur during the installation of the pulley device in the axial, radial, or angular direction, making installation simple. As a supplement, conventional vertical external oil tanks all have maintenance holes. Due to its simple installation, the pulley device also seals the maintenance holes, facilitating the maintenance and replacement of internal parts of the oil tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a partial enlarged view of the cylinder body of this utility model;

[0023] Figure 3 for Figure 1 A schematic diagram of the centerline wheel device;

[0024] Wherein: 1 is the cylinder, 2 is the corrugated metal core, 3 is the dial-type oil level gauge, 4 is the transmission mechanism, 5 is the oil supply pipeline, 6 is the breather pipe, 7 is the oil injection pipe, 8 is the exhaust pipe, 9 is the coupling, 10 is the bevel gear A, 11 is the reel assembly, 12 is the bearing with a seat, 13 is the rope, 14 is the connecting rod, 15 is the linear guide rail, 16 is the ball joint, 17 is the reel end plate, 18 is the reel shaft, 19 is the bevel gear B, 20 is the reel box, 21 is the sliding seat, and 22 is the limit block. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] like Figures 1-3As shown, this utility model includes a cylindrical body 1, a corrugated metal core 2, and a dial-type oil level gauge 3. The corrugated metal core 2 is placed on the upper side inside the cylindrical body 1, with its upper end mounted on the cylindrical body 1 and its lower end being a free end. The expansion and contraction direction of the corrugated metal core 2 is vertical. The dial-type oil level gauge 3 is mounted on the outer side of the cylindrical body 1. The bottom of the cylindrical body 1 is provided with an oil supply pipe 5, a breather pipe 6, an oil injection pipe 7, and an exhaust pipe 8. The cylindrical body 1 is connected to the transformer oil tank through the oil supply pipe 5, and transformer oil enters the oil cavity formed between the inside of the cylindrical body 1 and the outside of the corrugated metal core 2 through the oil supply pipe 5. The inside of the corrugated metal core 2 is connected to the outside through the breather pipe 6, which is used for breathing when the corrugated metal core 2 expands and contracts vertically. The oil injection pipe 7 is used to inject oil into the oil tank. The upper end of the exhaust pipe 8 extends to the upper part inside the cylindrical body 1, and the air inside the cylindrical body 1 is discharged through the exhaust pipe 8.

[0027] In this embodiment, the expansion and contraction motion of the metal corrugated core 2 is transmitted to the pointer shaft of the dial-type oil level gauge 3 through the transmission mechanism 4, thereby causing the pointer to rotate and display the actual oil level. The transmission mechanism 4 in this embodiment includes a coupling 9, a transmission assembly, a reel device 11, a rope 13, a connecting rod 14, a linear guide rail 15, and a sliding seat 21. The linear guide rail 15 is installed at the bottom inside the cylinder 1. The linear guide rail 15 has low friction, so it has high transmission efficiency and long service life. It can also adapt to various high and low temperature working environments and ensure the uniqueness of the horizontal pulling out and putting back direction of the rope 13. The rope 13 will only move forward or backward on a single straight line and will not be affected by the shaking of the metal corrugated core 2 on the running direction of the sliding seat 21, thus improving the accuracy of the pointer display of the oil level. The sliding seat 21 is slidably connected to the linear guide rail 15. The sliding direction of the sliding seat 21 on the linear guide rail 15 is perpendicular to the expansion and contraction direction of the metal corrugated core 2. Limiting blocks 22 are provided at both ends of the linear guide rail 15 along its length to prevent the sliding seat 21 from sliding out of the linear guide rail. A seated bearing 12 is installed at the lower end (i.e., the free end) of the corrugated metal core 2. One end of the connecting rod 14 is fixed to the seated bearing 12, which reduces the friction of the connecting rod 14 during rotation and reduces the load on the connecting rod 14 in the vertical direction when the corrugated metal core 2 expands and contracts, thus improving the service life of the entire mechanism. The other end of the connecting rod 14 is connected to one end of the ball joint 16, and the other end of the ball joint 16 is installed on the sliding seat 21. The corrugated metal core 2 will naturally sway during its expansion and contraction. The angle can be adjusted according to the actual movement through the ball joint 16, which reduces the external force on the connecting rod 14 when it pushes the sliding seat 21, thus extending the service life of the connecting rod 14 and the sliding seat 21.

[0028] The reel device 11 in this embodiment includes a reel cover plate 17, a reel shaft 18, and a reel box 20. A maintenance hole is provided at the bottom of the cylinder 1. The reel cover plate 17 is located outside the maintenance hole and is sealed to the maintenance hole cover plate by a sealing ring. The lower end of the reel shaft 18 is fixed to the reel cover plate 17 or is an integral structure. The reel box 20 is rotatably mounted on the upper end of the reel shaft 18. A coil spring is sleeved on the upper end of the reel shaft 18 inside the reel box 20. The two ends of the coil spring are respectively connected to the reel shaft 18 and the reel box 20. The reel device 11 is an integral structure, which facilitates installation and disassembly, facilitates maintenance and replacement of internal parts of the oil tank, and is used to seal the oil cavity. One end of the rope 12 is fixed to the sliding seat 21, and the other end of the rope 12 is wound around the reel box 20. The coil spring pulls the rope 13 back when the metal corrugated core 2 moves. The reel box 20 is placed horizontally, that is, the axial center line of the reel box 20 is perpendicular to the horizontal plane. The pulling direction and the retraction direction of the rope 12 are both horizontal. This placement makes the process of the rope 13 extending or shortening more stable and avoids the rope 13 from falling off the reel box 20 during operation, which would prevent the indicating mechanism from running cyclically. One end of the coupling 9 is connected to the pointer shaft of the dial oil level gauge 3, and the other end of the coupling 9 is connected to the reel box 20 through the transmission component.

[0029] In this embodiment, the transmission component is a bevel gear set, including bevel gear A10 and bevel gear B19. Bevel gear B19 is rotatably mounted on the reel shaft 18 and connected to the lower end of the reel box 20, rotating together with the reel box 20. Bevel gear A10 is connected to the other end of the coupling 9 and meshes with bevel gear B19, converting the rotation of the reel box 20 into the rotation of the pointer of the dial-type oil level gauge 3 through bevel gear B19, bevel gear 10, and coupling 9. During the installation of bevel gears A10 and B19, there may be axial, radial, or angular offsets or errors, which compensate for the misalignment, reduce vibration and impact, and improve the stability and lifespan of the entire system. The meshing structure of bevel gear A10 and bevel gear B19 is tight, reducing fatigue damage between gears.

[0030] The working principle of this utility model is as follows:

[0031] The interior of the cylinder 1 and the exterior of the corrugated metal core 2 form an oil cavity. The corrugated metal core 2 can expand and contract along the axial direction of the cylinder 1 inside the cylinder 1. The space between the bottom plate of the corrugated metal core 2 and the bottom plate of the cylinder 1 is the expansion and contraction space of the corrugated metal core 2, forming an oil conservator structure whose volume dynamically changes with the temperature of the transformer oil.

[0032] When the metal corrugated core 2 expands and contracts with the oil level, it drives the connecting rod 14 to swing. The connecting rod 14 pushes or pulls the sliding seat 21 on the linear guide rail 15 to change its stroke, causing the sliding seat 21 to slide on the linear guide rail 15. The rope 13 is pulled out or returned under the action of the coil spring. The adjustment of the length of the rope 13 causes the reel box 20 to drive the bevel gear B19 to rotate. Through the meshing transmission between the bevel gear B19 and the bevel gear A10 and the coupling 9, the pointer of the dial oil level gauge 3 rotates and displays the reading. This makes the pointer reading of the oil level gauge convenient and accurate, truly reflecting the changes in the oil level inside the oil tank, and has low operating costs and long service life.

Claims

1. A vertical external oil metal bellows oil tank with a pointer type oil level gauge, comprising a cylinder (1), a metal bellows core (2) and a dial type oil level gauge (3), wherein the metal bellows core (2) is located in the cylinder (1), the upper end of the metal bellows core (2) is installed on the cylinder (1), the lower end of the metal bellows core (2) is a free end, the expansion and contraction direction of the metal bellows core (2) is the vertical direction, the dial type oil level gauge (3) is installed on the cylinder (1), and the transformer oil enters the oil cavity formed between the inside of the cylinder (1) and the outside of the metal bellows core (2) through the oil conveying pipeline (5) connected to the cylinder (1); characterized in that: The expansion and contraction movement of the metal corrugated core (2) is transmitted to the pointer shaft of the dial oil level gauge (3) through a transmission mechanism (4), which comprises a shaft coupling (9), a transmission assembly, a wire wheel device (11), a wire rope (13), a connecting rod (14), a linear guide rail (15) and a sliding seat (21). The linear guide rail (15) is installed at the bottom of the cylinder (1), the sliding seat (21) is in sliding connection with the linear guide rail (15), the upper end of the connecting rod (14) is connected with the lower end of the metal corrugated core (2), and the lower end of the connecting rod (14) is connected with the sliding seat (21). The wire wheel device (11) comprises a wire wheel cover plate (17), a wire wheel shaft (18) and a wire wheel box (20). The wire wheel cover plate (17) is in sealing connection with the bottom of the cylinder (1), the lower end of the wire wheel shaft (18) is fixedly connected with the wire wheel cover plate (17) or is an integral structure, the wire wheel box (20) is installed at the upper end of the wire wheel shaft (18), one end of the wire rope (12) is connected with the sliding seat (21), and the other end of the wire rope (12) is wound on the wire wheel box (20). One end of the shaft coupling (9) is connected with the pointer shaft of the dial oil level gauge (3), and the other end of the shaft coupling (9) is connected with the wire wheel box (20) through the transmission assembly.

2. The vertical external oil metal bellows tank with pointer type oil level gauge according to claim 1, characterized in that: The wire wheel box (20) is rotatably installed at the upper end of the wire wheel shaft (18), a coil spring is sleeved on the part of the wire wheel shaft (18) located in the wire wheel box (20), and the two ends of the coil spring are connected with the wire wheel shaft (18) and the wire wheel box (20) respectively.

3. The vertical external oil metal bellows tank with pointer type oil level gauge as claimed in claim 1 wherein: The transmission assembly is a bevel gear set, which comprises a bevel gear A (10) and a bevel gear B (19). The bevel gear B (19) is rotatably installed on the wire wheel shaft (18) and connected with the wire wheel box (20), the bevel gear A (10) is connected with the other end of the shaft coupling (9) and in meshing transmission with the bevel gear B (19).

4. The vertical external oil metal bellows tank with pointer type oil level gauge as claimed in claim 1 wherein: The lower end of the metal corrugated core (2) is provided with a bearing with seat (12), and one end of the connecting rod (14) is fixed on the bearing with seat (12). The other end of the connecting rod (14) is connected with one end of a spherical hinge joint (16), and the other end of the spherical hinge joint (16) is installed on the sliding seat (21).

5. The vertical external oil metal bellows tank with pointer type oil level gauge as claimed in claim 1 wherein: The sliding direction of the sliding seat (21) on the linear guide rail (15) is perpendicular to the expansion and contraction direction of the metal corrugated core (2).

6. The vertical external oil metal bellows tank with pointer type oil level gauge as claimed in claim 1 wherein: The linear guide rail (15) is provided with limiting blocks (22) at both ends in the length direction to prevent the sliding seat (21) from derailing.

7. The vertical external fuel oil metal bellows tank with pointer type fuel level gauge as claimed in claim 1 wherein: The axial center line of the wire wheel box (20) is perpendicular to the horizontal plane, and the pulling and retracting directions of the wire rope (12) are both horizontal directions.

8. The vertical external oil metal bellows tank with pointer type oil level gauge as claimed in claim 1 wherein: A maintenance hole is formed in the bottom of the cylinder (1), the wire wheel cover plate (17) is located outside the maintenance hole and is in sealing connection with the bottom of the cylinder (1) through a sealing ring.

9. The vertical external fuel oil metal bellows tank with pointer type fuel level gauge as claimed in claim 1 wherein: The bottom of the cylinder (1) is respectively provided with a breathing pipe (6), an oil injection pipe (7) and an exhaust pipe (8), the inside of the metal corrugated core (2) is communicated with the outside through the breathing pipe (6), the oil injection pipe (7) is used for oil injection to the oil storage tank, the upper end of the exhaust pipe (8) extends to the upper part in the cylinder (1), and the air in the inside of the cylinder (1) is discharged through the exhaust pipe (8).

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