Oil tank cable via hole sealing and locking structure

Abstract

The utility model discloses an oil tank cable via hole sealing and locking structure which comprises an oil tank wall, a cable, a stud, a blade ring and a flange nut, the oil tank wall is provided with an oil tank wall hole channel, and one end of the cable penetrates through the oil tank wall hole channel to be connected to a temperature measuring sensor of a bearing bush. A first through hole is formed in the center of the stud in the axial direction, the stud is connected to the outer side of a cable in a sleeved mode through the first through hole, the stud, the blade ring and the flange nut are arranged, the stud is used for being connected to an oil tank wall hole channel of the oil tank wall, the flange nut and the stud are connected to form extrusion on the blade ring, and therefore the cable can be fixed conveniently. The two ends of the blade ring are extruded and pressed on the cable to form two seals between the blade ring and the cable, hole passing and fixing of the cable are completed, the sealing performance between the cable and the blade ring is improved by forming the two seals, the cable is fixed, the interior of the device is sealed, and the whole structure is simple and easy to achieve.

Description

Technical Field

[0001] This utility model relates to the field of fuel tank cable laying technology, specifically a fuel tank cable through-hole sealing and locking structure. Background Technology

[0002] Bearings are critical components that bear and transmit the weight and thrust of a hydro-generator unit, and are also the main components that ensure the rotor rotates coaxially with the stator. As the component that directly contacts the stator and rotor shafts, it is continuously subjected to stress during operation. Due to the high speed and high operating temperature of the main shaft instruments, if heat dissipation is not timely and the high temperature persists for a long time, it will lead to a shortened equipment lifespan or premature deterioration, and the bearing bushes may even burn out directly, affecting the overall operation of the unit and increasing maintenance costs. Therefore, the importance of real-time temperature monitoring of the bearing bushes is self-evident.

[0003] Thrust bearings, for example, are often immersed in the thrust bearing oil tank. During turbine operation, it is difficult to detect their temperature externally. Generally, embedded sensors are used with external cables to transmit temperature data for remote monitoring. However, in existing bearing temperature measurement systems, the placement of the sensor cables on components such as the turbine oil tank often only considers cable connections or the use of protective pipes to protect the cables themselves, neglecting the sealing issue of the oil tank when the cable passes through holes. There is no practical and feasible structure for sealing and locking the cable through the holes.

[0004] The placement of the temperature measuring components should not negatively impact the equipment being measured. Therefore, how to properly handle the sealing and locking problem when laying cables through holes during bearing temperature measurement, and how to develop a corresponding locking structure, are urgent problems that this utility model needs to solve. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a sealing and locking structure for the through-hole of a fuel tank cable. This structure utilizes a double-ended bolt, a cutting ring, and a flange nut. The double-ended bolt is used to connect to the through-hole in the fuel tank wall. The flange nut, connected to the double-ended bolt, compresses the cutting ring, pressing both ends of the cutting ring tightly against the cable to form two seals. This completes the through-hole fixing of the cable and improves the sealing performance between the cable and the cutting ring. This achieves cable fixation and internal sealing of the device. The overall structure is simple and easy to implement.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing and locking structure for a fuel tank cable through-hole includes a fuel tank wall and a cable. The fuel tank wall has a channel, and one end of the cable passes through this channel and connects to a temperature sensor on a bearing bush. The structure also includes a double-ended bolt, a cutting edge ring, and a flange nut. The double-ended bolt has a first through-hole at its center along the axial direction, through which it is fitted onto the outside of the cable. The flange nut has a second through-hole at its center along the axial direction, through which it is fitted onto the outside of the cable. The cutting edge ring is positioned between the double-ended bolt and the flange nut and fitted onto the outside of the cable. One end of the double-ended bolt is connected to the fuel tank wall channel, and the flange nut is connected to the other end of the double-ended bolt. The flange nut and the double-ended bolt press against the cutting edge ring to form two seals.

[0008] Preferably, the outer side of the end of the double-ended bolt that connects to the oil tank wall channel is provided with a front threaded part, and the double-ended bolt is threadedly connected to the oil tank wall channel through the front threaded part.

[0009] Preferably, the front threaded portion is a tapered thread, the diameter of which gradually increases along the oil tank wall channel toward the double-ended bolt, and the shape of the oil tank wall channel is adapted to the front threaded portion.

[0010] Preferably, a limiting part is integrally provided on the outer wall of the double-ended bolt near the front threaded part, and when the front threaded part is connected in place in the oil tank wall channel, the limiting part abuts against the oil tank wall.

[0011] Preferably, the other end of the double-ended bolt is provided with a rear threaded portion, and the inner wall of the connecting end of the flange nut is provided with an internal thread. The flange nut and the double-ended bolt are threadedly connected through the internal thread and the rear threaded portion.

[0012] Preferably, the blade ring is an open ring with outer conical surfaces on its outer walls at both ends, and the opening of the blade ring is used for the cable to pass through.

[0013] Preferably, the first through hole on the double-ended bolt has a first inner conical surface at the end near the blade ring, and the second through hole on the flange nut has a second inner conical surface at the end near the blade ring, wherein the first and second inner conical surfaces are adapted to the outer conical surface.

[0014] Preferably, the diameters of the first through hole and the second through hole are slightly larger than the diameter of the cable.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention utilizes a double-ended bolt, a cutting ring, and a flange nut. The double-ended bolt is connected and fixed to the oil tank wall through a hole until the limiting part is tightly against the oil tank wall, thus sealing the oil tank cavity from the outside and preventing liquid from leaking out of the oil tank through the oil tank wall hole. Then, the flange nut is connected to the double-ended bolt. As the flange nut and double-ended bolt are gradually tightened, they compress the cutting ring between the flange nut and the double-ended bolt, pressing the two ends of the cutting ring tightly against the cable to form two seals. This completes the cable passage and fixation, and by forming two seals, the sealing performance between the cable and the cutting ring is improved. This achieves cable fixation and sealing of the device's interior. The overall structure is simple and easy to implement, convenient to operate, and highly practical. Attached Figure Description

[0017] Figure 1 A schematic diagram of the sealing and locking structure for the fuel tank cable through-hole in use.

[0018] Figure 2 A schematic diagram showing the disassembled structure of the sealing and locking mechanism for the fuel tank cable through-hole;

[0019] Figure 3 This is a schematic diagram of the sealing and locking structure for the fuel tank cable through-hole and the cross-sectional structure of the fuel tank wall.

[0020] In the diagram: 1. Double-ended bolt; 101. Front threaded part; 102. Limiting part; 103. Rear threaded part; 104. First inner conical surface; 105. First through hole; 2. Blade ring; 201. Outer conical surface; 3. Flange nut; 301. Internal thread; 302. Second inner conical surface; 303. Second through hole; 4. Cable; 5. Tank wall; 501. Tank wall channel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figures 1-3This embodiment provides a sealing and locking structure for a fuel tank cable through-hole, including a fuel tank wall 5 and a cable 4. A fuel tank wall channel 501 is provided on the fuel tank wall 5. One end of the cable 4 passes through the fuel tank wall channel 501 and connects to a temperature sensor on the bearing bush. The structure also includes a double-ended bolt 1, a cutting edge ring 2, and a flange nut 3. A first through-hole 105 is axially formed at the center of the double-ended bolt 1, and the double-ended bolt 1 is sleeved on the outside of the cable 4 through the first through-hole 105. A second through-hole 303 is axially formed at the center of the flange nut 3, and the flange nut 3 is sleeved on the outside of the cable 4 through the second through-hole 303. The cutting edge ring 2 is positioned between the double-ended bolt 1 and the flange nut 3 and sleeved on the outside of the cable 4. One end of the double-ended bolt 1 is connected to the fuel tank wall channel 501. The flange nut 3 is connected to the other end of the double-ended bolt 1. The flange nut 3 and the double-ended bolt 1 compress the blade ring 2 to form two seals. During installation, the double-ended bolt 1 is first connected and fixed to the oil tank wall hole 501 of the oil tank wall 5. Then, the flange nut 3 is connected to the double-ended bolt 1. As the flange nut 3 and the double-ended bolt 1 are gradually tightened, they compress the blade ring 2 between the flange nut 3 and the double-ended bolt 1, pressing the two ends of the blade ring 2 tightly onto the cable 4 and forming two seals between them. This completes the passage and fixation of the cable 4. By forming two seals, the sealing performance between the cable 4 and the blade ring 2 is improved, thus fixing the cable 4 and sealing the inside of the device. The overall structure is simple and easy to implement, convenient to operate, and highly practical.

[0023] In this embodiment, as Figure 3 As shown, the outer side of the end of the double-ended bolt 1 that is connected to the oil tank wall channel 501 is provided with a front threaded part 101. The oil tank wall channel 501 is a threaded hole. The double-ended bolt 1 is threaded into the oil tank wall channel 501 through the front threaded part 101. The front threaded part 101 facilitates the connection and installation of the double-ended bolt 1 and the oil tank wall 5. The cable 4 passes through the first through hole 105 of the double-ended bolt 1 to determine the installation position of the cable 4.

[0024] Furthermore, such as Figure 3 As shown, the front thread 101 is a tapered thread, and the diameter of the tapered thread gradually increases along the oil tank wall channel 501 toward the double-ended bolt 1. The shape of the oil tank wall channel 501 is adapted to the front thread 101. When the front thread 101 of the double-ended bolt 1 is connected to the oil tank wall channel 501, the end with the smaller diameter of the front thread 101 enters the end with the larger diameter of the oil tank wall channel 501 first, thereby increasing the misalignment space for connection and helping the front thread 101 to be better inserted and connected to the oil tank wall channel 501, thus improving the convenience of connection and installation.

[0025] In this embodiment, as Figure 3As shown, a limiting part 102 is integrally provided on the outer wall of the double-ended bolt 1 near the front threaded part 101. Specifically, the diameter of the limiting part 102 is larger than the diameter of the double-ended bolt 1. The limiting part 102 is arranged around the circumference of the double-ended bolt 1. When the front threaded part 101 is connected in place in the oil tank wall channel 501, the limiting part 102 abuts against the oil tank wall 5, so that the side of the limiting part 102 is in close contact with the oil tank wall 5, thereby achieving a seal between the inside of the oil tank cavity and the oil tank wall channel 501.

[0026] In this embodiment, as Figure 3 As shown, the other end of the double-ended bolt 1 is provided with a rear threaded portion 103, and the inner wall of the connecting end of the flange nut 3 is provided with an internal thread 301. The flange nut 3 and the double-ended bolt 1 are threadedly connected through the internal thread 301 and the rear threaded portion 103. The internal thread 301 and the rear threaded portion 103 facilitate the quick connection between the flange nut 3 and the double-ended bolt 1. The structure is simple and the operation is convenient. It is used to form a seal by pressing the blade ring 2.

[0027] In this embodiment, as Figure 3 As shown, the cutting ring 2 is an open ring with outer conical surfaces 201 on both ends of its outer wall. The opening of the cutting ring 2 is for the cable 4 to pass through. The first through hole 105 on the double-ended bolt 1 has a first inner conical surface 104 near the end of the cutting ring 2. The second through hole 303 on the flange nut 3 has a second inner conical surface 302 near the end of the cutting ring 2. The first inner conical surface 104 and the second inner conical surface 302 are adapted to the outer conical surface 201. The slope of the first inner conical surface 104 and the second inner conical surface 302 is the same as that of the outer conical surface 201. When the first inner conical surface 104 and the second inner conical surface 302 come into contact with the outer conical surface 201, the first inner conical surface 104 and the second inner conical surface 302 can fit tightly with the outer conical surface 201. During the process of tightening the flange nut 3 and the double-ended bolt 1, the first inner conical surface 104 and the second inner conical surface 302 contact and squeeze the outer conical surface 201, squeezing the cable 4 inward to fix it relative to the tank wall 5, and achieving two seals between the tank and the first through hole 105, effectively preventing the problem of liquid leakage from the tank.

[0028] In this embodiment, as Figure 3 As shown, the diameters of the first through hole 105 and the second through hole 303 are larger than the diameter of the cable 4. Preferably, the diameters of the first through hole 105 and the second through hole 303 are slightly larger than the diameter of the cable 4, with a diameter difference between 0.5mm and 1.5mm. This allows the cable 4 to pass through the first through hole 105 and the second through hole 303, which helps to fit the double-ended bolt 1 and the flange nut 3 onto the outside of the cable 4. Furthermore, when the double-ended bolt 1 is tightened, it will not cause the cable 4 to rotate, thus preventing the cable 4 from getting tangled.

[0029] Working principle: In use, the cable 4 is passed sequentially through the flange nut 3, the blade ring 2, the double-ended bolt 1, and the oil tank wall channel 501. The entire device is in a relaxed state. The threaded part 101 at the front end of the double-ended bolt 1 is threaded into the oil tank wall channel 501 and locked until the limiting part 102 is tightly against the oil tank wall 5, completing the seal between the oil tank cavity and the outside, preventing the liquid in the oil tank from seeping out from the oil tank wall channel 501. The rotation of the double-ended bolt 1 will not cause the cable 4 to rotate and become tangled. Then, the flange nut 3 is threadedly connected to the double-ended bolt 1 and locked. The blade ring 2 is pressed between the second inner conical surface 302 of the flange nut 3 and the first inner conical surface 104 of the double-ended bolt 1, squeezing the cable 4 inward so that it is fixed relative to the oil tank wall 5, and achieving two seals between the oil tank and the first through hole 105, effectively preventing the problem of liquid seepage from the oil tank.

[0030] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A sealing and locking structure for a fuel tank cable through-hole, comprising a fuel tank wall (5) and a cable (4), wherein a fuel tank wall channel (501) is provided on the fuel tank wall (5), and one end of the cable (4) passes through the fuel tank wall channel (501) and is connected to a temperature sensor of a bearing bush, characterized in that: It also includes a double-ended bolt (1), a cutting ring (2), and a flange nut (3). The double-ended bolt (1) has a first through hole (105) axially opened at the center. The double-ended bolt (1) is sleeved on the outside of the cable (4) through the first through hole (105). The flange nut (3) has a second through hole (303) axially opened at the center. The flange nut (3) is sleeved on the outside of the cable (4) through the second through hole (303). The cutting ring (2) is set between the double-ended bolt (1) and the flange nut (3) and sleeved on the outside of the cable (4). One end of the double-ended bolt (1) is connected to the oil tank wall channel (501). The flange nut (3) is connected to the other end of the double-ended bolt (1). The flange nut (3) and the double-ended bolt (1) squeeze the cutting ring (2) to form two seals.

2. The sealing and locking structure for a fuel tank cable through-hole according to claim 1, characterized in that: The double-ended bolt (1) is provided with a front threaded part (101) on the outer side of one end that is connected to the oil tank wall channel (501). The double-ended bolt (1) is threaded into the oil tank wall channel (501) through the front threaded part (101).

3. The sealing and locking structure for the fuel tank cable through-hole according to claim 2, characterized in that: The front threaded portion (101) is configured as a vertical thread, and the diameter of the vertical thread gradually increases along the oil tank wall channel (501) towards the double-ended bolt (1). The shape of the oil tank wall channel (501) is adapted to the front threaded portion (101).

4. The sealing and locking structure for a fuel tank cable through-hole according to claim 3, characterized in that: The double-ended bolt (1) has an integrally provided limiting part (102) on its outer wall near the front threaded part (101). When the front threaded part (101) is connected in place in the oil tank wall channel (501), the limiting part (102) abuts against the oil tank wall (5).

5. The sealing and locking structure for the fuel tank cable through-hole according to claim 2, characterized in that: The double-ended bolt (1) has a rear threaded portion (103) on the outer side of the other end, and the flange nut (3) has an internal thread (301) on the inner wall of the connecting end. The flange nut (3) and the double-ended bolt (1) are threadedly connected by the internal thread (301) and the rear threaded portion (103).

6. The sealing and locking structure for a fuel tank cable through-hole according to claim 1, characterized in that: The blade ring (2) is an open ring with an outer conical surface (201) on the outer walls at both ends. The opening of the blade ring (2) is used for the cable (4) to pass through.

7. The sealing and locking structure for a fuel tank cable through-hole according to claim 6, characterized in that: The first through hole (105) on the double-ended bolt (1) is provided with a first inner conical surface (104) at the end near the blade ring (2), and the second through hole (303) on the flange nut (3) is provided with a second inner conical surface (302) at the end near the blade ring (2). The first inner conical surface (104) and the second inner conical surface (302) are adapted to the outer conical surface (201).

8. The sealing and locking structure for a fuel tank cable through-hole according to claim 1, characterized in that: The diameters of the first through hole (105) and the second through hole (303) are slightly larger than the diameter of the cable (4).

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