A vortex probe drag reduction and radioactive dust collection device

Abstract

The application relates to a vortex probe drag reduction and radioactive dust collecting device, which comprises a probe positioning system (1), a probe pusher (2) and a drag reduction and radioactive dust collecting device main body (3); one end of the drag reduction and radioactive dust collecting device main body (3) is connected with the probe positioning system (1), the other end of the drag reduction and radioactive dust collecting device main body (3) is connected with the probe pusher (2), and the vortex probe is arranged in the drag reduction and radioactive dust collecting device main body (3). The vortex probe drag reduction and radioactive dust collecting device can increase the vortex inspection speed, collect radioactive dust, concentrate the radioactive dust for treatment and reduce the influence on the physical safety of personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of non-destructive testing of steam generator heat transfer tubes and similar equipment, in particular to a vortex probe drag reduction and radioactive dust collection device. BACKGROUND

[0002] The nuclear power plant steam generator heat transfer tube is a heat exchange device that transmits the heat energy of the primary coolant obtained from the reactor to the secondary circuit feed water, and is an important part of the primary pressure boundary, so accurate evaluation of the integrity of the heat transfer tube is crucial to the safe operation of the nuclear power plant. Eddy current testing is widely used in the testing of nuclear power plant heat transfer tubes due to its speed, high detection sensitivity, and no electrical contact. Since the testing environment for eddy current inspection has high radioactivity, and the eddy current inspection of the heat transfer tube is often in the critical path of the maintenance of the nuclear power plant, the system is required to be as simple as possible, highly automated, reliable in operation, and short in implementation period.

[0003] Reference Figure 1 The entire detection system is divided into several subsystems according to function, each functional subsystem has strong independence and can be used independently; it can also be connected with other functional subsystems through a local area network to form a complete detection system, and communication between the functional subsystems is realized through the network and the software interface. The eddy current system is divided into several subsystems according to function, including a signal system that realizes the acquisition and processing of eddy current signals, a probe positioning system that realizes the positioning of the probe on the collection object, a probe scanning system that realizes the movement of the probe in the heat transfer tube, and an integrated transmission system that realizes the transmission of various control signals and data between the computer and the functional systems. In the existing eddy current detection system, the eddy current inspection speed is low and the radioactive dust needs to be collected manually. SUMMARY

[0004] Therefore, it is necessary to provide a vortex probe drag reduction and radioactive dust collection device to increase the eddy current inspection speed and collect radioactive dust, in view of the low eddy current inspection speed and the large radiation of manually collecting radioactive dust in the existing eddy current detection system.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme:

[0006] A vortex probe drag reduction and radioactive dust collection device, comprising a probe positioning system, a probe puller and a drag reduction and radioactive dust collection device main body; one end of the drag reduction and radioactive dust collection device main body is connected to the probe positioning system, the other end of the drag reduction and radioactive dust collection device main body is connected to the probe puller, and the vortex probe is installed in the drag reduction and radioactive dust collection device main body.

[0007] Working principle: the probe pusher drives the eddy current probe to be transported to the probe positioning system, and the probe positioning system drives the eddy current probe to move to the heat transfer pipe opening; the drag reduction and radioactive dust collection device main body reduces the resistance of the eddy current probe transportation, and collects radioactive dust at the same time.

[0008] Further, the probe positioning system comprises a probe positioning system main body, a toe structure, a double-probe guide device and an eddy current probe conveying pipe; the toe structure is installed on the probe positioning system main body; the double-probe guide device is connected with the probe positioning system main body and the eddy current probe conveying pipe respectively at the end close to the double-probe guide device; and the end of the eddy current probe conveying pipe away from the double-probe guide device is connected with the drag reduction and radioactive dust collection device main body.

[0009] Further, the drag reduction and radioactive dust collection device main body comprises a joint assembly, a quick-connect male head, a quick-connect female head and a radioactive dust collection pipe; the eddy current probe is installed in the joint assembly, the end of the joint assembly close to the probe pusher is connected with the probe pusher, the end of the joint assembly away from the probe pusher is connected with the radioactive dust collection pipe at the end close to the joint assembly, and the end of the radioactive dust collection pipe away from the joint assembly is connected with the eddy current probe conveying pipe through the quick-connect male head and the quick-connect female head.

[0010] Further, the joint assembly comprises a main clamping plate and a secondary clamping plate; the main clamping plate and the secondary clamping plate are connected to form the joint assembly, and the eddy current probe is installed in the joint assembly; the end of the main clamping plate close to the probe pusher is connected with the probe pusher, the end of the main clamping plate away from the probe pusher is connected with the radioactive dust collection pipe at the end close to the main clamping plate, and the end of the radioactive dust collection pipe away from the main clamping plate is connected with the eddy current probe conveying pipe through the quick-connect male head and the quick-connect female head.

[0011] Further, the quick-connect male head and the quick-connect female head are connected by a sealing ring.

[0012] Further, the main clamping plate is provided with a first half sealing piece, a first half sealing ring, an air hole and a first gap; the secondary clamping plate is provided with a second half sealing piece and a second half sealing ring; the end of the first half sealing piece is provided with the first half sealing ring, the end of the second half sealing piece is provided with the second half sealing ring, the first half sealing piece and the second half sealing piece are matched, and the first half sealing ring and the second half sealing ring are matched; the first half sealing piece and the second half sealing piece are connected to form a sealing piece, and the first half sealing ring and the second half sealing ring are connected to form a sealing ring; the eddy current probe is put into the sealing piece through the first gap; the gap between the main clamping plate and the secondary clamping plate is sealed by a clamping plate sealing gasket; the air hole is connected with an air pipe through pneumatic quick connection, the air pipe is connected with a negative pressure device and an air compressor respectively through a one-to-two joint, and a radioactive dust collection box is installed in front of the negative pressure device.

[0013] Further, the vortex probe front end is connected with the sealing piece front end, and the vortex probe rear end is connected with the sealing piece rear end. The vortex probe end is matched with the sealing piece and the sealing ring to prevent gas and dust from entering the probe pusher.

[0014] Further, the probe pusher comprises a probe pusher body, a motor, a roller and a pusher interface. The roller and the pusher interface are mounted on the probe pusher body, the motor provides driving force for the roller, and the pusher interface is provided with a second notch. The pusher interface is connected with the main clamping plate, the vortex probe is placed in the sealing piece through the first notch or the second notch, the motor drives the roller to roll, and the friction force generated by the roller pressing on the vortex probe conveying pipe pushes the vortex probe.

[0015] Further, the motor is a servo motor, and the roller is a pressure-adjustable roller. The servo motor drives the pressure-adjustable roller to drive the vortex probe to convey after deceleration, and the friction force generated by the pressure-adjustable roller pressing on the vortex probe conveying pipe pushes the vortex probe.

[0016] The vortex probe drag reduction and radioactive dust collection device has the following beneficial technical effects:

[0017] The vortex probe drag reduction and radioactive dust collection device has the following beneficial technical effects: The vortex probe drag reduction and radioactive dust collection device has the following beneficial technical effects:

[0018] Figure 1 It is a structural schematic diagram of an existing vortex detection system;

[0019] Figure 2 It is a structural schematic diagram of the vortex probe drag reduction and radioactive dust collection device;

[0020] Figure 3 It is a connection schematic diagram of the quick male head and the quick female head;

[0021] Figure 4 It is a structural schematic diagram of the main clamping plate;

[0022] Figure 5 It is a structural schematic diagram of the secondary clamping plate;

[0023] Figure 6 It is a structural schematic diagram of the probe pusher.

[0024] In the figure, 1, probe positioning system; 11, toe structure; 12, double probe guide device; 13, eddy current probe conveying pipe; 2, probe pusher; 21, pusher interface; 22, roller; 211, second notch; 3, drag reduction and radioactive dust collection device main body; 31, joint assembly; 32, male quick connector; 33, female quick connector; 34, radioactive dust collection pipe; 35, sealing ring; 311, main clamping plate; 3111, first half sealing element; 3112, first half sealing ring; 3113, air hole; 3114, first notch; 3115, pneumatic quick connector; 312, secondary clamping plate; 3121, second half sealing element; 3122, second half sealing ring; 4, steam generator water chamber. DETAILED DESCRIPTION

[0025] In the description of the present application, it should be understood that the terms "left end", "right end", "upper", "lower", "outer", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] The present application will be further described in detail below in conjunction with the drawings and examples.

[0027] Example 1

[0028] Referring to Figure 2 , the present application provides an eddy current probe drag reduction and radioactive dust collection device, comprising a probe positioning system 1, a probe pusher 2 and a drag reduction and radioactive dust collection device main body 3; one end of the drag reduction and radioactive dust collection device main body 3 is connected to the probe positioning system 1, the other end of the drag reduction and radioactive dust collection device main body 3 is connected to the probe pusher 2, and the eddy current probe is installed in the drag reduction and radioactive dust collection device main body 3.

[0029] Working principle: the probe pusher 2 drives the eddy current probe to be conveyed to the probe positioning system 1, the probe positioning system 1 drives the eddy current probe to move to the heat transfer pipe opening; the drag reduction and radioactive dust collection device main body 3 reduces the resistance of the eddy current probe conveying, and simultaneously collects radioactive dust.

[0030] Further, the probe positioning system 1 comprises a probe positioning system main body, a toe structure 11, a double probe guide device 12 and an eddy current probe conveying pipe 13; the toe structure 11 is installed on the probe positioning system main body; the double probe guide device 12 is respectively connected to the probe positioning system main body and the eddy current probe conveying pipe 13 close to one end of the double probe guide device 12; the end of the eddy current probe conveying pipe away from the double probe guide device 12 is connected to the drag reduction and radioactive dust collection device main body 3.

[0031] The probe positioning system 1 takes the heat pipe as the target positioning point, is fixed on the heat pipe by the toe structure 11, thereby avoiding the installation of the probe positioning system at the water chamber inlet of the steam generator water chamber 4, and opens the water chamber inlet of the steam generator water chamber 4; in this way, the double-probe guide device 12 can drive the eddy current probe to move to any pipe opening, and 100% coverage of the heat pipe inspection is realized; this way is accurate in positioning, and can realize walking in any direction by adopting path planning.

[0032] Further, referring to Figure 2 , the drag reduction and radioactive dust collecting device body 3 comprises a joint assembly 31, a quick-connect male head 32, a quick-connect female head 33, and a radioactive dust collecting pipe 34; the eddy current probe is installed in the joint assembly 31, the joint assembly 31 is connected with the probe pusher 2 at one end close to the probe pusher 2, the joint assembly 31 is connected with the radioactive dust collecting pipe 34 at one end away from the probe pusher 2 and close to the joint assembly 31, and the radioactive dust collecting pipe is connected with the eddy current probe conveying pipe 13 through the quick-connect male head 32 and the quick-connect female head 33 at one end away from the joint assembly 31.

[0033] Further, referring to Figure 2 and Figure 3 , the joint assembly 31 comprises a main clamping plate 311 and a secondary clamping plate 312; the main clamping plate 311 and the secondary clamping plate 312 are connected to form the joint assembly 31, and the eddy current probe is installed in the joint assembly 31; the main clamping plate 311 is connected with the probe pusher 2 at one end close to the probe pusher 2, the main clamping plate 311 is connected with the radioactive dust collecting pipe 34 at one end away from the probe pusher 2 and close to the main clamping plate 311, and the radioactive dust collecting pipe is connected with the eddy current probe conveying pipe 13 through the quick-connect male head 32 and the quick-connect female head 33 at one end away from the main clamping plate 311.

[0034] Further, referring to Figure 3 , the quick-connect male head 32 and the quick-connect female head 33 are sealingly connected through a sealing ring 35.

[0035] Further, referring to Figure 4 and 5The main clamp plate 311 is provided with a first half seal 3111, a first half seal ring 3112, an air hole 3113 and a first notch 3114. The secondary clamp plate 312 is provided with a second half seal 3121 and a second half seal ring 3122. The first half seal 3111 is provided with the first half seal ring 3112 at the end thereof, and the second half seal 3121 is provided with the second half seal ring 3122 at the end thereof. The first half seal 3111 and the second half seal 3121 are matched, and the first half seal ring 3112 and the second half seal ring 3122 are matched. The first half seal 3111 and the second half seal 3121 are connected to form a seal, and the first half seal ring 3112 and the second half seal ring 3122 are connected to form a seal ring. The vortex probe is placed into the seal through the first notch 3114. The gap between the main clamp plate 311 and the secondary clamp plate 312 is sealed by a clamp sealing gasket. The air hole 3113 is connected to an air pipe through a pneumatic quick connector 3115. The air pipe is connected to a negative pressure device and an air compressor through a one-to-two joint, and a radioactive dust collecting box is installed in front of the negative pressure device.

[0036] When the probe pusher 2 pushes the vortex probe, the air compressor is started to reduce the contact between the rear end of the vortex probe and the vortex probe conveying pipe 13 and the radioactive dust collecting pipe 34 through gas flow, reduce the friction, and improve the passability of the vortex probe at the elbow.

[0037] When the probe pusher 2 pulls back the vortex probe, the negative pressure device is started to generate negative pressure to assist the vortex probe to pull back. When the negative pressure is generated, the radioactive dust can flow to the negative pressure device with the gas flow, and a radioactive dust collecting box is installed in front of the negative pressure device to store the dust. When the storage amount reaches a certain amount, the radioactive dust collecting box is replaced.

[0038] The vortex probe is provided with a coil at the front end thereof, and the diameter of the front end of the vortex probe is greater than that of the rear end.

[0039] Further, the front end of the vortex probe is connected to the front end of the seal, and the rear end of the vortex probe is connected to the rear end of the seal. The end of the vortex probe is matched with the seal and the seal ring to prevent gas and dust from entering the probe pusher 2.

[0040] Further, referring to Figure 2 and Figure 6The probe pusher 2 comprises a probe pusher body, a motor, a roller 22 and a pusher interface 21; the roller 22 and the pusher interface 21 are installed on the probe pusher body, the motor provides driving force for the roller 22, and the pusher interface 21 is provided with a second notch 211; the pusher interface 21 is connected with the main clamping plate 311, and the eddy current probe is put into the sealing element through the first notch 3114 or the second notch 211; the motor drives the roller 22 to roll, and the friction force generated by the roller 22 pressing on the eddy current probe conveying pipe 13 pushes the eddy current probe. The probe pusher 2 sends the eddy current probe from the inlet of the steam generator water chamber 4 into the heat transfer pipe, and then collects the eddy current data of the heat transfer pipe when the probe is pulled back.

[0041] Further, the motor is a servo motor, and the roller 22 is a pressure-adjustable roller; the servo motor drives the pressure-adjustable roller 22 to drive the eddy current probe to convey after deceleration, and the friction force generated by the pressure-adjustable roller 22 pressing on the eddy current probe conveying pipe 13 pushes the eddy current probe.

[0042] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A drag reduction and radioactive dust collection device for a vortex probe, characterized by, The application relates to a vortex probe positioning system, which comprises a probe positioning system (1), a probe pusher (2) and a drag reduction and radioactive dust collecting device main body (3); one end of the drag reduction and radioactive dust collecting device main body (3) is connected with the probe positioning system (1), the other end of the drag reduction and radioactive dust collecting device main body (3) is connected with the probe pusher (2), and the vortex probe is arranged in the drag reduction and radioactive dust collecting device main body (3); the drag reduction and radioactive dust collecting device main body (3) comprises a joint assembly (31), a quick connecting male head (32), a quick connecting female head (33) and a radioactive dust collecting pipe (34); the joint assembly (31) comprises a main clamping plate (311) and a secondary clamping plate (312); the main clamping plate (311) and the secondary clamping plate (312) are connected to form the joint assembly (31), and the vortex probe is arranged in the joint assembly (31); one end of the main clamping plate (311) close to the probe pusher (2) is connected with the probe pusher (2), one end of the main clamping plate (311) far away from the probe pusher (2) is connected with one end of the radioactive dust collecting pipe (34) close to the main clamping plate (311), and the other end of the radioactive dust collecting pipe (34) far away from the main clamping plate (311) is connected with the vortex probe conveying pipe (13) through the quick connecting male head (32) and the quick connecting female head (33); the quick connecting male head (32) and the quick connecting female head (33) are sealingly connected through a sealing ring (35); the main clamping plate (311) is connected with an air pipe, and the air pipe is connected with a negative pressure device and an air compressor through a one-to-two joint.

2. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 1, wherein, The probe positioning system (1) comprises a probe positioning system main body, a toe structure (11), a double-probe guiding device (12) and a vortex probe conveying pipe (13); the toe structure (11) is arranged on the probe positioning system main body; the double-probe guiding device (12) is connected with the probe positioning system main body and one end of the vortex probe conveying pipe (13) close to the double-probe guiding device (12); and the other end of the vortex probe conveying pipe (13) far away from the double-probe guiding device (12) is connected with the drag reduction and radioactive dust collecting device main body (3).

3. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 1, wherein, The main clamping plate (311) is provided with a first half seal (3111), a first half sealing ring (3112), an air hole (3113) and a first notch (3114); the secondary clamping plate (312) is provided with a second half seal (3121) and a second half sealing ring (3122); the first half seal (3111) is provided with a first half sealing ring (3112) at the end, the second half seal (3121) is provided with a second half sealing ring (3122) at the end, the first half seal (3111) and the second half seal (3121) are matched, the first half sealing ring (3112) and the second half sealing ring (3122) are matched; the first half seal (3111) and the second half seal (3121) are connected to form a seal, the first half sealing ring (3112) and the second half sealing ring (3122) are connected to form a sealing ring; the vortex probe is put into the seal through the first notch (3114); the gap between the main clamping plate (311) and the secondary clamping plate (312) is sealed by a clamping plate sealing gasket; the air hole (3113) is connected with an air pipe through a pneumatic quick connector (3115), and the air pipe is connected with a negative pressure device and an air compressor through a one-to-two joint respectively.

4. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 3, wherein, A radioactive dust collection box is installed in front of the negative pressure device.

5. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 3, wherein, The probe pusher (2) comprises a probe pusher body, a motor, a roller (22) and a pusher interface (21); the roller (22) and the pusher interface (21) are installed on the probe pusher body, the motor provides driving force for the roller (22), and the pusher interface (21) is provided with a second notch (211); the pusher interface (21) is connected with the main clamping plate (311), and the vortex probe is put into the seal through the first notch (3114) or the second notch (211).

6. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 5, wherein, The motor is a servo motor.

7. The eddy current probe drag reduction and radioactive dust collection apparatus of claim 5, wherein, The roller (22) is a pressure-adjustable roller.

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