Traction machine for nuclear power place
By designing the upper and side baffle structures on the traction machine used in the nuclear power field, the exhaust passage and exhaust holes are formed, the problem of the traction machine being sprayed by chemical substances in the LOCA test is solved, reducing the cost and meeting the test requirements.
Patent Information
- Application Number
- CN202421565765.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The traction machines in nuclear power plants are easily sprayed directly by chemicals during LOCA tests, resulting in the brakes and traction wheels requiring special materials and sealing structures, which increases costs.
A traction machine for nuclear power sites is designed, using an upper baffle and a side baffle structure surrounded by three sides to form exhaust passages and exhaust holes to avoid direct spraying of chemicals to the brakes and traction wheels, thus no special materials and sealing structure are required.
It effectively reduces the cost of the traction machine, and meets the chemical spraying requirements of the LOCA test, and ensures the smooth discharge of high-pressure airflow in the elevator shaft through the design of exhaust passages and exhaust holes.
Smart Images
Figure CN222860900U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of supporting equipment for nuclear power plants, in particular to a traction machine used in nuclear power plants. Background Art
[0002] Nuclear power is an energy source with advantages such as high energy density, high stability and low carbon emissions. Accelerating the development of nuclear power and giving full play to the role of nuclear power in power supply and energy transformation are of great significance for adjusting the energy structure, ensuring reliable energy supply and promoting the realization of the "dual carbon" goals. In order to implement safety and economy, the LOCA test came into being. The benchmark accident test is customarily called the LOCA test. The purpose of the test is to test whether the equipment can work normally and stably during and after the accident. The LOCA test includes three stages: the initial stage before the test (preheating), the accident stage (thermal shock) and the post-accident stage (insulation). There are chemical spray requirements for the equipment in the containment.
[0003] There are also chemical spraying requirements for traction machines (used in elevators) in nuclear power sites (mainly nuclear power plants). At the same time, in order to allow the hot gas shock in the elevator shaft to be discharged upward smoothly and relieve pressure, a machine room is generally not set up on the top of the shaft. This causes the traction machine to be directly sprayed with chemical substances. In order to meet the chemical spraying requirements, special improvements are needed to the corrosion-prone parts of the traction machine, mainly for the brakes and traction wheels located on both sides of the traction machine. Special materials and sealing structures are required, resulting in a higher cost for the traction machine. Utility Model Content
[0004] The purpose of the utility model is to provide a traction machine used in a nuclear power plant. The utility model has the advantage of low cost on the basis of meeting the LOCA test requirements.
[0005] The technical solution of the utility model is as follows: a traction machine used in a nuclear power plant, wherein a brake and a traction wheel are respectively arranged on both axial sides of the traction machine, an upper baffle is arranged above the traction machine, and side baffles are arranged on the outer sides of the brake and the outer sides of the traction wheel, the width of the side baffles are bent inwards on both sides and the length of the bent part exceeds the corresponding brake or traction wheel, an exhaust channel is formed between the two side baffles, the two side baffles are located below the upper baffle, a plurality of water baffles formed by outward stamping are arranged on the two side baffles, the upper end and horizontal sides of the water baffles are connected to the side baffles, and exhaust holes for exhausting air downwards are formed between the lower end of the water baffles and the side baffles.
[0006] In the traction machine used in the aforementioned nuclear power plant, the cross-section of the upper baffle is a "human" shape, the bottom surface of the upper baffle is in contact with the upper end surface of the side baffle, and the bent portion of the side baffle is connected to the mounting foot of the traction machine.
[0007] In the traction machine used in the aforementioned nuclear power plant, a horizontal support plate and an inclined rib plate are provided on the inner side of the bent portion of the side baffle plate. The inner end of the support plate is merged with the lower end of the rib plate and then connected to the mounting foot. The outer end of the support plate is connected to the side baffle plate, and the upper end of the rib plate is connected to the upper part of the rib plate.
[0008] In the traction machine used in the aforementioned nuclear power plant, the upper baffle is placed on the side baffle, and four L-shaped positioning plates are provided at the bottom of the upper baffle. The four positioning plates are respectively attached to the outside of the four bends of the two side baffles to prevent the upper baffle from moving in the horizontal direction.
[0009] In the aforementioned traction machine used in the nuclear power plant, at least two tension springs are provided between the upper baffle and the side baffle.
[0010] In the aforementioned traction machine used in the nuclear power plant, the tension spring is located on the inner side of the side baffle.
[0011] Compared with the prior art, the utility model sets an upper baffle above the existing traction machine, and sets three-sided side baffles on both sides of the axial direction of the existing traction machine to prevent the traction machine from being directly sprayed with chemicals, especially the brake and the traction wheel. Therefore, the brake and the traction wheel do not need to use special materials and special sealing structures, which reduces costs. The exhaust channel formed between the two side baffles and the exhaust holes set on the side baffles can be used to smoothly discharge the high-pressure airflow in the elevator shaft to meet the LOCA test requirements. In summary, the utility model has the advantage of low cost on the basis of meeting the LOCA test requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a front cross-sectional schematic diagram of Example 1.
[0013] Figure 2 It is a bottom view of Example 1.
[0014] Figure 3 It is a left side sectional view of Example 1.
[0015] Figure 4 It is a three-dimensional schematic diagram of Example 1.
[0016] The markings in the attached drawings are: 1-brake, 2-traction wheel, 3-upper baffle, 4-side baffle, 5-exhaust channel, 6-exhaust hole, 7-water baffle, 8-mounting foot, 9-bracket plate, 10-rib plate, 11-positioning plate, 12-tension spring. DETAILED DESCRIPTION
[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0018] Embodiment 1. A traction machine used in a nuclear power plant, such as Figure 1 As shown, the traction machine is provided with a brake 1 and a traction sheave 2 on both sides of the axial direction, respectively. The motor part in the middle of the traction machine is protected by a well-sealed motor housing, which meets the requirements of chemical spraying and does not require protection. The brake 1 and the traction sheave 2 are moving parts and have areas prone to leakage, which require protection. The characteristics are as follows:
[0019] An upper baffle plate 3 with a herringbone cross section is provided above the traction machine, and side baffle plates 4 are provided on the outer side of the brake 1 and the outer side of the traction wheel 2. The upper baffle plate 3 and the side baffle plates 4 are both made of corrosion-resistant materials.
[0020] Both sides of the width of the side baffle plate 4 are bent inward and the length of the bent portion exceeds the corresponding brake 1 or traction wheel 2. An exhaust channel 5 is formed between the two side baffle plates 4. The two side baffle plates 4 are located below the upper baffle plate 3. The bottom surface of the upper baffle plate 3 is in contact with the upper end surface of the side baffle plate 4. Both side baffle plates 4 are provided with a plurality of water baffle plates 7 formed by stamping outward. The upper end and both horizontal sides of the water baffle plate 7 are connected to the side baffle plate 4. An exhaust hole 6 for downward exhaust is formed between the lower end of the water baffle plate 7 and the side baffle plate 4.
[0021] A horizontal support plate 9 and an inclined rib plate 10 are provided on the inner side of the bent portion of the side baffle 4. The inner end of the support plate 9 is combined with the lower end of the rib plate 10 and connected to the mounting foot 8. When the traction machine is installed on the crossbeam at the top of the shaft, the fasteners for locking the crossbeam and the mounting foot 8 pass through the support plate 9 and the rib plate 10. The outer end of the support plate 9 is connected to the side baffle 4, and the upper end of the rib plate 10 is connected to the upper part of the rib plate 10. The support plate 9, the rib plate 10 and the side baffle 4 form a triangular structure, which forms a stable support and a more stable structure.
[0022] The upper baffle 3 is placed on the side baffles 4. Four L-shaped positioning plates 11 are provided at the bottom of the upper baffle 3. The four positioning plates 11 are respectively attached to the outside of the four bends of the two side baffles 4, so that the upper baffle 3 will not move in the horizontal direction, but can move vertically. Three tension springs 12 are provided between the upper baffle 3 and the side baffles 4. The tension springs 12 are located on the inner side of the side baffles 4 to prevent them from being sprayed by external corrosive liquids. The tension springs 12 are used to tighten the upper baffle 3 to prevent vibration and noise during the movement of the elevator.
[0023] Working principle: During the LOCA test, the chemical spray solution is blocked by the upper baffle 3 and the side baffle 4 and cannot enter the brake 1 and the traction wheel 2. The motor housing of the traction machine may be sprayed, but the motor housing (corrosion-resistant material) is well sealed and the solution will not enter there, so that the traction machine meets the chemical spray requirements.
[0024] As for the impact of high-pressure hot air in the elevator shaft, the upward airflow in the shaft is discharged smoothly from the exhaust hole 6 and the exhaust channel 5 to release the pressure. In extreme cases, the airflow overcomes the tension of the tension spring 12 and pushes the upper baffle 3 upward, so that a new air path is formed between the upper baffle 3 and the side baffle 4, increasing the pressure release speed. After the pressure drops, the upper baffle 3 falls back onto the side baffle 4 under the action of gravity and the tension of the tension spring 12.
[0025] Embodiment 2. Different from Embodiment 1, the upper baffle plate 3 is fixedly connected to the side baffle plate 4, such as by screw connection or welding.
[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
Claims
1. A traction machine for a nuclear power plant, wherein a brake (1) and a traction sheave (2) are respectively provided on both axial sides of the traction machine, and wherein: An upper baffle (3) is provided above the traction machine, and side baffles (4) are provided on the outer sides of the brake (1) and the traction wheel (2). The width of the side baffles (4) is bent inwards on both sides, and the length of the bent part exceeds the corresponding brake (1) or traction wheel (2). An exhaust passage (5) is formed between the two side baffles (4). The two side baffles (4) are located below the upper baffle (3). A plurality of water baffles (7) formed by outward stamping are provided on the two side baffles (4). The upper end and both horizontal sides of the water baffles (7) are connected to the side baffles (4), and an exhaust hole (6) for exhausting air downwards is formed between the lower end of the water baffle (7) and the side baffles (4).
2. The traction machine for a nuclear power plant according to claim 1, characterized in that: The cross section of the upper baffle (3) is in the shape of a "human"; the bottom surface of the upper baffle (3) is in contact with the upper end surface of the side baffle (4); and the bent portion of the side baffle (4) is connected to the mounting foot (8) of the traction machine.
3. The traction machine for a nuclear power plant according to claim 2, characterized in that: A horizontal support plate (9) and an inclined rib plate (10) are provided on the inner side of the bent portion of the side baffle (4); the inner end of the support plate (9) is connected to the mounting foot (8) after being combined with the lower end of the rib plate (10); the outer end of the support plate (9) is connected to the side baffle (4); and the upper end of the rib plate (10) is connected to the upper part of the rib plate (10).
4. The traction machine for a nuclear power plant according to claim 2, characterized in that: The upper baffle (3) is placed on the side baffles (4), and four L-shaped positioning plates (11) are provided at the bottom of the upper baffle (3). The four positioning plates (11) are respectively attached to the outer sides of four bends of the two side baffles (4), so that the upper baffle (3) will not move in the horizontal direction.
5. The traction machine for a nuclear power plant according to claim 4, characterized in that: At least two tension springs (12) are provided between the upper baffle (3) and the side baffle (4).
6. The traction machine for a nuclear power plant according to claim 5, characterized in that: The tension spring (12) is located on the inner side of the side baffle (4).