Nuclear power station stainless steel container leak detection system

Abstract

The utility model discloses a nuclear power station stainless steel container leak detection system, relates to the technical field of leak detection, and aims to solve the problems that in the background technology, profile steel needs to be fixed at a weld joint, operation time is long, climbing operation is needed during use, working efficiency is low, and cost is high. In order to solve the problems that in the prior art, liquid needs to be injected into a stainless steel container to perform leak detection treatment on a weld joint of the stainless steel container, and practicability is low, the following scheme is provided: the ultrasonic leak detection device comprises a base and an ultrasonic leak detection instrument probe, a fixing mechanism is arranged at the top of the base, and a lifting mechanism is arranged at the top of the base; the lifting mechanism comprises a multi-stage telescopic rod connected to the outer wall of the top of the base through a bolt and a lifting plate connected to the top end of a piston rod of the multi-stage telescopic rod through a bolt. According to the utility model, the stainless steel container can be subjected to rapid leak detection treatment, weld joints with different heights can be detected, the working efficiency is improved, liquid does not need to be injected into the stainless steel container during detection, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of leak detection technology, and in particular to a leak detection system for stainless steel containers in nuclear power plants. Background Technology

[0002] Leak detection is used to detect whether there is a leak in the container. After the stainless steel container of a nuclear power plant is welded and assembled, leak detection is required.

[0003] A search revealed a Chinese patent (application number "201922369260.7") disclosing "A Leak Detection System for a Stainless Steel Container in a Nuclear Power Plant." This system includes a stainless steel container with several welds. A structural steel section is attached to each weld, forming a branch that covers the corresponding weld. All branches are interconnected to form a leak detection network. The system also includes a main pipe connected to the lower part of the leak detection network. However, the above leak detection system has the following problems during use:

[0004] 1. It is necessary to fix the steel sections at the weld seams of the stainless steel container, which takes a long time and requires working at height, resulting in low work efficiency;

[0005] 2. It requires injecting liquid into the stainless steel container before leak detection can be performed on the weld seams, which is not very practical. Utility Model Content

[0006] This utility model provides a leak detection system for stainless steel containers in nuclear power plants, which solves the problems of the leak detection systems proposed in the prior art, which require fixing steel sections at the weld seams of the stainless steel containers, resulting in long operation times, the need for working at heights, low work efficiency, and the need to inject liquid into the stainless steel containers before leak detection can be performed, thus reducing practicality.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A leak detection system for stainless steel containers in nuclear power plants includes a base and an ultrasonic leak detector probe. The base has a fixing mechanism on its top and a lifting mechanism on its top. The lifting mechanism includes a multi-stage telescopic rod bolted to the outer wall of the base top and a lifting plate bolted to the piston rod of the multi-stage telescopic rod. The lifting plate has an adjustment assembly on its top, which includes two connecting seats bolted to the outer wall of the lifting plate top, two adjusting motors bolted to one outer wall of each connecting seat, two adjusting plates rotatably mounted on the outer walls of each connecting seat, and mounting plates fixed to the outer walls of the two adjusting plates. The mounting plate has a limiting assembly, which includes two fixing blocks bolted to the top and bottom outer walls of the mounting plate and two limiting rollers.

[0009] Preferably, the four corners of the base are bolted with universal wheels with brakes, and two handles are fixed on the top outer wall of the base.

[0010] Preferably, the fixing mechanism includes two fixing seats that are bolted to the top outer wall of the base, two fixing plates that are bolted to the opposite outer wall of the two fixing seats, and two connecting plates that are bolted to the top outer wall of the base. The two connecting plates are bolted to the opposite outer wall of the two fixing seats.

[0011] Preferably, one end of each of the two output shafts of the regulating motor is connected to a connecting shaft via a coupling, and the two regulating plates are respectively connected to the outer walls of the two connecting shafts via splines. A fixing cylinder is bolted to one side of the outer wall of the mounting plate.

[0012] The above scheme uses a multi-stage telescopic piston rod to move the lifting plate and the ultrasonic leak detector probe to rise, thereby detecting leaks in the welds of the stainless steel container in both the vertical and horizontal directions. The rotation of the output shafts of two adjusting motors causes the two adjusting plates, the mounting plate, and the ultrasonic leak detector probe to deflect, thereby detecting the welds at the bottom of the stainless steel container.

[0013] Preferably, one end of the ultrasonic leak detector probe is slidably mounted on the outer wall of the mounting plate, and a fastening bolt is screwed onto the outer wall of the fixed cylinder, and the fastening bolt and the ultrasonic leak detector probe form a tight fit.

[0014] Preferably, two fixed shafts are connected to the outer walls of the two fixed blocks on opposite sides by bearings, and the two limiting rollers are respectively connected to the outer walls of the two fixed shafts by pins.

[0015] The above method involves moving the ultrasonic leak detector probe. When the limiting roller contacts the outer wall of the stainless steel container, there is a certain gap between the ultrasonic leak detector probe and the outer wall of the stainless steel container to prevent wear of the ultrasonic leak detector probe during movement. The ultrasonic leak detector probe is connected to the ultrasonic leak detector using a wire, thereby performing leak detection on the stainless steel container.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The multi-stage telescopic piston rod moves to lift the lifting plate and the ultrasonic leak detector probe, which performs leak detection on the welds in the vertical and horizontal directions of the stainless steel container. The output shafts of the two adjusting motors rotate to deflect the two adjusting plates, the mounting plate and the ultrasonic leak detector probe, which detect the welds at the bottom of the stainless steel container.

[0018] 2. Move the ultrasonic leak detector probe. When the limiting roller contacts the outer wall of the stainless steel container, there is a certain gap between the ultrasonic leak detector probe and the outer wall of the stainless steel container to prevent wear of the ultrasonic leak detector probe during movement. Use a wire to connect the ultrasonic leak detector probe to the ultrasonic leak detector to perform leak detection on the stainless steel container.

[0019] In summary, this invention enables rapid leak detection of stainless steel containers and allows for the inspection of welds at different heights, improving work efficiency. Furthermore, it eliminates the need to inject liquid into the stainless steel container during inspection, enhancing its practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall main structure of a leak detection system for stainless steel containers in nuclear power plants proposed in this utility model.

[0021] Figure 2 This is a front view structural diagram of the fixing mechanism of a leak detection system for stainless steel containers in nuclear power plants proposed in this utility model.

[0022] Figure 3 This is a front view structural diagram of the lifting mechanism of a leak detection system for stainless steel containers in nuclear power plants proposed in this utility model.

[0023] Figure 4 This is a side view of the adjustment component of a leak detection system for stainless steel containers in nuclear power plants, as proposed in this utility model.

[0024] Figure 5 This is a front view schematic diagram of the regulating motor and connecting shaft of a leak detection system for stainless steel containers in nuclear power plants, as proposed in this utility model.

[0025] Figure 6 This is a schematic diagram of the main structure of the limiting component of a leak detection system for stainless steel containers in nuclear power plants, as proposed in this utility model.

[0026] In the diagram: 1. Base; 2. Fixing mechanism; 201. Fixing seat; 202. Fixing plate; 203. Connecting plate; 3. Lifting mechanism; 301. Multi-stage telescopic rod; 302. Lifting plate; 4. Adjusting assembly; 401. Connecting seat; 402. Adjusting motor; 403. Connecting shaft; 404. Adjusting plate; 405. Mounting plate; 406. Fixing cylinder; 5. Ultrasonic leak detector probe; 6. Limiting assembly; 601. Fixing block; 602. Fixing shaft; 603. Limiting roller. Detailed Implementation

[0027] 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.

[0028] Example 1, referring to Figure 1-5 A leak detection system for a stainless steel container in a nuclear power plant includes a base 1 and an ultrasonic leak detector probe 5. The base 1 has four casters with brakes bolted to its outer walls at the bottom corners. Two handles are fixed to the outer wall of the top of the base 1. A fixing mechanism 2 is located on the top of the base 1. The fixing mechanism 2 includes two fixing seats 201 bolted to the outer wall of the top of the base 1, two fixing plates 202 bolted to the outer walls of opposite sides of the two fixing seats 201, and two connecting plates 203 bolted to the outer wall of the top of the base 1. The two connecting plates 203 are bolted to the outer walls of opposite sides of the two fixing seats 201. A lifting mechanism 3 is located on the top of the base 1. The lifting mechanism 3 includes a multi-stage telescopic rod 301 bolted to the outer wall of the top of the base 1 and a lifting plate 302 bolted to the top of the piston rod of the multi-stage telescopic rod 301. One end of the output shaft of each of the two regulating motors 402 is connected to a connecting shaft via a coupling. 403, two adjusting plates 404 are respectively connected to the outer walls of the two connecting shafts 403 by splines. A fixed cylinder 406 is bolted to one side of the outer wall of the mounting plate 405. The top of the lifting plate 302 is provided with an adjusting assembly 4. The adjusting assembly 4 includes two connecting seats 401 respectively bolted to the top outer wall of the lifting plate 302, two adjusting motors 402 respectively bolted to one side of the outer wall of the two connecting seats 401, two adjusting plates 404 respectively rotatably mounted on the outer walls of the two connecting seats 401, and a mounting plate 405 fixed to the outer walls of the two adjusting plates 404. The two adjusting motors 402 are controlled by a synchronous rotation algorithm in the prior art to realize synchronous rotation of the output shafts of the two adjusting motors 402. One end of the ultrasonic leak detector probe 5 passes through and slides on the outer wall of the mounting plate 405. A fastening bolt is screwed to the outer wall of the fixed cylinder 406, and the fastening bolt forms a fastening fit with the ultrasonic leak detector probe 5.

[0029] Example 2, refer to Figure 6 A leak detection system for a stainless steel container in a nuclear power plant also includes a limiting component 6. The limiting component 6 includes two fixing blocks 601 that are respectively bolted to the top and bottom outer walls of the mounting plate 405 and two limiting rollers 603. Two fixing shafts 602 are connected to the outer walls of the two fixing blocks 601 on opposite sides by bearings. The two limiting rollers 603 are respectively connected to the outer walls of the two fixing shafts 602 by pins.

[0030] Working principle: The piston rod of the multi-stage telescopic rod 301 moves, driving the lifting plate 302 and the ultrasonic leak detector probe 5 to rise, moving the ultrasonic leak detector probe 5. When the limiting roller 603 contacts the outer wall of the stainless steel container, there is a certain gap between the ultrasonic leak detector probe 5 and the outer wall of the stainless steel container to prevent wear of the ultrasonic leak detector probe 5 during movement. The ultrasonic leak detector probe 5 is connected to the ultrasonic leak detector by a wire, thereby performing leak detection on the stainless steel container. The output shafts of the two adjusting motors 402 rotate, driving the two adjusting plates 404, the mounting plate 405 and the ultrasonic leak detector probe 5 to deflect, thus detecting the weld at the bottom of the stainless steel container.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A nuclear power plant stainless steel containment leak detection system comprising a base (1) and an ultrasonic leak detector probe (5) characterised in that, The top of the base (1) is provided with a fixing mechanism (2), and the top of the base (1) is provided with a lifting mechanism (3), which comprises a multi-stage telescopic rod (301) connected to the outer wall of the top of the base (1) by bolts and a lifting plate (302) connected to the top end of the piston rod of the multi-stage telescopic rod (301) by bolts. The top of the lifting plate (302) is provided with an adjusting assembly (4), which comprises two connecting seats (401) connected to the top outer wall of the lifting plate (302) by bolts, two adjusting motors (402) connected to the outer wall of one side of the two connecting seats (401) by bolts, two adjusting plates (404) rotatably installed on the outer wall of the two connecting seats (401), and a mounting plate (405) fixedly arranged on the outer wall of the two adjusting plates (404). The mounting plate (405) is provided with a limiting assembly (6), and the limiting assembly (6) comprises two fixed blocks (601) connected to the top and bottom outer walls of the mounting plate (405) by bolts and two limiting rollers (603).

2. The nuclear power plant stainless steel vessel leak detection system in accordance with claim 1, wherein, The bottom outer walls of the four corners of the base (1) are connected by bolts, and two handles are fixedly arranged on the top outer wall of the base (1).

3. The nuclear power plant stainless steel vessel leak detection system in accordance with claim 1, wherein, The fixing mechanism (2) comprises two fixed seats (201) connected to the top outer wall of the base (1) by bolts, two fixed plates (202) connected to the opposite outer walls of the two fixed seats (201) by bolts, and two connecting plates (203) connected to the top outer wall of the base (1) by bolts, and the two connecting plates (203) are connected to the opposite outer walls of the two fixed seats (201) by bolts.

4. The nuclear power plant stainless steel vessel leak detection system in accordance with claim 1, wherein, One end of the output shaft of each of the two adjusting motors (402) is connected to a connecting shaft (403) through a shaft coupling, and the two adjusting plates (404) are connected to the outer walls of the two connecting shafts (403) through spline connection.

5. A nuclear power plant stainless steel vessel leak detection system in accordance with claim 4 wherein, One end of the output shaft of each of the two adjusting motors (402) is connected to a connecting shaft (403) through a shaft coupling, and the two adjusting plates (404) are connected to the outer walls of the two connecting shafts (403) through spline connection.

6. The nuclear power plant stainless steel vessel leak detection system in accordance with claim 1, wherein, One end of the output shaft of each of the two adjusting motors (402) is connected to a connecting shaft (403) through a shaft coupling, and the two adjusting plates (404) are connected to the outer walls of the two connecting shafts (403) through spline connection. The outer walls of the two fixed blocks (601) are connected to two fixed shafts (602) through bearings, and the two limiting rollers (603) are connected to the outer walls of the two fixed shafts (602) through pin shafts.

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