Interlayer constant temperature water cooling device for butt welding seam of nuclear power stainless steel pipe

Abstract

This utility model discloses an interlayer constant-temperature water cooling device for butt welds of stainless steel pipes used in nuclear power plants. The device includes a constant-temperature water tank and an annular water-cooled wall. The water-cooled wall is a split type, comprising an upper half and a lower half. One end of each half is hinged, and the other end is secured with a detachable locking mechanism. The upper and lower half of the water-cooled wall are respectively provided with a water inlet and an outlet. The water outlet of the constant-temperature water tank connects to the water inlet of the water-cooled wall, and the water inlet also connects to the outlet. This interlayer constant-temperature water cooling device for butt welds of stainless steel pipes used in nuclear power plants can be clamped outside the weld layer for water cooling, achieving rapid cooling and significantly improving cooling efficiency. A single weld takes only 60 minutes, greatly improving welding efficiency and increasing production capacity by 400%.

Description

Technical Field

[0001] This utility model relates to the field of temperature control technology for welding of nuclear power equipment, and in particular to a constant temperature water cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants. Background Technology

[0002] In traditional nuclear power plant pipeline welding, welding is often interrupted due to interpass temperatures exceeding the limit (>400℃). Welding can only resume when the interpass temperature is ≤150℃. However, the interpass cooling process relies solely on static heat dissipation, which is time-consuming, taking up to 240 minutes for a single weld joint. This slow cooling rate results in low welding efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model designs a constant temperature water cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants.

[0004] The present invention adopts the following technical solution: A constant-temperature water-cooling device for the interlayer of butt weld seams of stainless steel pipes used in nuclear power plants includes a constant-temperature water tank and an annular water-cooled wall. The water-cooled wall is a split type, comprising an upper half-circle and a lower half-circle. One end of the upper half-circle and the lower half-circle are hinged together, and the other end is secured by a detachable locking mechanism. The upper half-circle and the lower half-circle are respectively provided with a water-cooled wall inlet and a water-cooled wall outlet. The water tank outlet of the constant-temperature water tank is connected to the water-cooled wall inlet, and the water tank inlet is connected to the water-cooled wall outlet.

[0005] Preferably, a temperature sensor is installed on the water-cooled wall.

[0006] Preferably, the temperature sensor is a PT100 type, with the probe embedded in the weld seam at a distance of 20mm from the weld seam.

[0007] Preferably, the locking mechanism is a butterfly bolt locking mechanism.

[0008] Preferably, the constant temperature water tank is equipped with a semiconductor cooling chip assembly and a ceramic heating plate.

[0009] Preferably, the constant temperature water tank is equipped with a PID control system, which connects and controls the semiconductor cooling chip group and the ceramic heating plate to control the temperature in the constant temperature water tank within the range of -15~100℃.

[0010] Preferably, the inner arc surfaces of the upper half and lower half of the water-cooled wall are respectively provided with unidirectional straight-through water channels distributed in a serpentine pattern, and the two ends of the unidirectional straight-through water channels distributed in a serpentine pattern are connected to the water inlet and the water outlet of the water-cooled wall.

[0011] The beneficial effects of this utility model are: This utility model designs a constant temperature water cooling device for the interlayer of butt weld of stainless steel pipes in nuclear power plants. It can be clamped outside the welding layer to cool the weld with water, achieve rapid cooling, greatly improve cooling efficiency, and the time for a single weld joint is only 60 minutes, which greatly improves welding efficiency and increases production capacity by 400%. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the water cooling device in this utility model; Figure 2 This is a schematic diagram of the internal structure of the water-cooled wall in this utility model; Figure 3 This is a schematic diagram of the structure of a constant temperature water tank in this utility model; In the diagram: 1. Upper half of the water-cooled wall; 2. Lower half of the water-cooled wall; 3. Wing bolt locking mechanism; 4. Hinge; 5. Water-cooled wall outlet; 6. Water-cooled wall inlet; 7. One-way straight-through water tank; 8. Temperature sensor; 9. Water tank inlet; 10. Water tank outlet; 11. PID control system; 12. Ceramic heating plate; 13. Semiconductor cooling chip assembly. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figures 1-3 As shown, a constant temperature water cooling device for the interlayer of butt weld of stainless steel pipes in nuclear power plants includes a constant temperature water tank and an annular water-cooled wall. The water-cooled wall is a split type, including an upper half ring 1 and a lower half ring 2. One end of the upper half ring and the lower half ring are hinged by a hinge 4, and the other end is provided with a detachable locking mechanism for locking. The upper half ring and the lower half ring are respectively provided with a water-cooled wall inlet 6 and a water-cooled wall outlet 5. The water tank outlet 10 of the constant temperature water tank is connected to the water-cooled wall inlet, and the water tank inlet 9 is connected to the water-cooled wall outlet.

[0014] Temperature sensor 8 is installed on the water-cooled wall. The temperature sensor is a PT100 type, and the probe is embedded in the weld seam, 20mm away from the weld seam.

[0015] The locking mechanism adopts a butterfly bolt locking mechanism 3. The constant temperature water tank is equipped with a semiconductor cooling chip group 13 and a ceramic heating plate 12.

[0016] The constant temperature water tank is equipped with a PID control system 11, which connects and controls the semiconductor cooling chip group and the ceramic heating plate to control the temperature in the constant temperature water tank within the range of -15~100℃.

[0017] The inner arc surfaces of the upper half and lower half of the water-cooled wall are respectively provided with unidirectional straight-through water channels 7 distributed in a serpentine pattern. The two ends of the unidirectional straight-through water channels distributed in a serpentine pattern are connected to the water inlet and the water outlet of the water-cooled wall.

[0018] When using this utility model, open the wing bolts, unfold the upper and lower half of the water-cooled wall to wrap around the pipe welding joint, tighten the wing bolts to 25 N·m to ensure that the upper and lower half of the water-cooled wall are in full contact with the weld, start the PID control system to set the water temperature, the temperature sensor monitors in real time during welding, and the PID control system dynamically adjusts the heating and cooling power.

[0019] This invention can be clamped outside the welding layer to water cool the weld, achieving rapid cooling and greatly improving cooling efficiency. The time for a single weld joint is only 60 minutes, which greatly improves welding efficiency and increases production capacity by 400%.

[0020] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A constant-temperature water-cooling device for the interlayer of butt weld seams of stainless steel pipes used in nuclear power plants, characterized in that, It includes a constant temperature water tank and an annular water-cooled wall. The water-cooled wall is a split type, consisting of an upper half and a lower half. One end of the upper half and the lower half are hinged together, and the other end is equipped with a detachable locking mechanism. The upper half and the lower half are respectively provided with a water-cooled wall inlet and a water-cooled wall outlet. The water outlet of the constant temperature water tank is connected to the water inlet of the water-cooled wall, and the water inlet of the water tank is connected to the water outlet of the water-cooled wall.

2. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 1, characterized in that, Temperature sensors are installed on the water-cooled wall.

3. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 2, characterized in that, The temperature sensor is a PT100 type, and the probe is embedded in the weld seam at a distance of 20mm from the weld seam.

4. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 1, characterized in that, The locking mechanism is a butterfly bolt locking mechanism.

5. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 1, characterized in that, The constant temperature water tank is equipped with a semiconductor cooling chip assembly and a ceramic heating plate.

6. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 1, characterized in that, The constant temperature water tank is equipped with a PID control system, which connects and controls the semiconductor cooling chip group and the ceramic heating plate to control the temperature in the constant temperature water tank within the range of -15~100℃.

7. The constant-temperature water-cooling device for the interlayer of butt weld seam of stainless steel pipes in nuclear power plants according to claim 1, characterized in that, The inner arc surfaces of the upper half and lower half of the water-cooled wall are respectively provided with unidirectional straight-through water channels distributed in a serpentine pattern. The two ends of the unidirectional straight-through water channels distributed in a serpentine pattern are connected to the water inlet and the water outlet of the water-cooled wall.

Images