CN219370629U - Reactor control rod guide cylinder inspection device - Google Patents

Abstract

The utility model relates to a reactor control rod guide cylinder inspection device which is used for detecting the abrasion loss of a reactor control rod guide cylinder, wherein the reactor control rod guide cylinder comprises a guide plate used for guiding, a guide hole is arranged on the guide plate, and the reactor control rod guide cylinder inspection device comprises a support frame, a connecting piece arranged on the support frame and a measuring piece connected with the connecting piece; the connecting piece stretches into the guide plate along the axial direction of the reactor control rod guide cylinder, the number of the measuring pieces is at least two, each measuring piece is arranged around the periphery of the connecting piece, and each measuring piece stretches into the corresponding guide hole so as to measure the abrasion loss of the hole wall of the corresponding guide hole. The at least two measuring pieces are arranged around the periphery of the connecting piece, so that the at least two measuring pieces can respectively extend into different guide holes, abrasion loss of the hole walls of a plurality of guide holes in the guide plate can be measured simultaneously, and the detection efficiency is improved.

Description

Reactor control rod guide cylinder inspection device

Technical Field

The utility model relates to the technical field of special tools, in particular to a reactor control rod guide cylinder inspection device.

Background

Control rod guide barrels (CRGT) belong to the reactor internals and the main function in the operation of a nuclear power plant is to ensure that the nuclear safety requirements are met when the control bundles (RCCA) fall down, stopping the chain reactions in the core for a limited period of time. CRGT is also used for guiding RCCA stepping motion, controlling power consumption and temperature of the reactor, and avoiding interference between RCCA skeleton and guide plate. Worldwide, nuclear power plant rod drop time tests are mandatory to ensure that the reactor can be safely shut down. The CRGT is a tubular structure fixed to the guide cylinder support plate. The device comprises an upper guide cylinder assembly and a lower guide cylinder assembly, wherein the upper guide cylinder assembly and the lower guide cylinder assembly comprise a plurality of upper guide plates. The number of the guide holes of the guide plate is 24, and the guide holes correspond to 24 control rods respectively. According to foreign nuclear power operation experience, the CRGT may be worn after long-time operation, if the CRGT guide plate is severely worn, the RCCA assembly may deviate from the channel in the stepping process, the guide plate can prevent the RCCA assembly from falling down, the rod falling time is affected, and the RCCA clamping rod is caused under severe conditions and cannot be normally inserted into the reactor core. In the prior art, an ultrasonic inspection cylinder is adopted to extend into the guide holes in the CRGT guide plate one by one to detect the abrasion condition of the guide holes, but the number of the guide holes of the guide plate is more, and the detection efficiency is low.

Disclosure of Invention

Based on this, it is necessary to provide a reactor control rod guide cylinder inspection device aiming at the technical problems that the prior ultrasonic inspection cylinder is adopted to extend into the guide holes one by one, but the number of the guide holes of the guide plate is large and the detection efficiency is low.

The reactor control rod guide cylinder inspection device is used for detecting the abrasion loss of a reactor control rod guide cylinder and comprises a guide plate used for guiding, and guide holes are formed in the guide plate; the connecting pieces extend into the guide plates along the axial direction of the reactor control rod guide cylinder, the number of the measuring pieces is at least two, the measuring pieces are arranged around the periphery of the connecting pieces, and the measuring pieces extend into the corresponding guide holes so as to measure the abrasion loss of the walls of the corresponding guide holes.

In one embodiment, the connector is capable of axial rotation about the reactor control rod guide tube relative to the support frame.

In one embodiment, the reactor control rod guide tube inspection device further includes a connection arm corresponding to the number of the measuring pieces, each of the measuring pieces being connected to the connection piece by the corresponding connection arm, the connection arm being configured to be retractable in a radial direction of the reactor control rod guide tube.

In one embodiment, each measuring member includes a main body connected to the connecting member and a pulse generating receiver connected to the main body for transmitting and receiving ultrasonic waves reflected by the corresponding hole wall toward the hole wall of the corresponding guide hole.

In one embodiment, each of the measurement members is configured to be movable relative to the support frame in an axial direction of the reactor control rod guide tube.

In one embodiment, each of the measurement members is flush in a plane perpendicular to the axial direction of the reactor control rod guide tube.

In one embodiment, the measuring member further comprises a rotary mirror connected to the main body, the pulse generating receiver emits the ultrasonic wave toward the rotary mirror along the axial direction of the reactor control rod guide cylinder, and the ultrasonic wave is reflected on the wall of the corresponding guide hole along the radial direction of the reactor control rod guide cylinder through the rotary mirror.

In one embodiment, the measuring part further comprises a third driving part, the third driving part is connected to the main body, the rotary mirror is connected to a power output end of the third driving part, and the third driving part is used for driving the rotary mirror to axially rotate around the reactor control rod guide cylinder.

In one embodiment, the axis of the ultrasonic wave emitted from the pulse generating receiver toward the rotary mirror coincides with the center of the corresponding guide hole in the axial direction of the guide hole.

In one embodiment, the main body comprises a fixed cylinder connected with the connecting piece, a containing cavity is arranged in the fixed cylinder, the transmitting end of the pulse generating receiver is contained in the containing cavity, and the axis of the ultrasonic wave emitted by the pulse generating receiver towards the rotating mirror coincides with the axial direction of the containing cavity.

The beneficial effects are that:

the utility model provides a reactor control rod guide cylinder inspection device which is used for detecting the abrasion loss of a reactor control rod guide cylinder, wherein the reactor control rod guide cylinder comprises a guide plate used for guiding, a guide hole is arranged on the guide plate, and the reactor control rod guide cylinder inspection device comprises a support frame, a connecting piece arranged on the support frame and a measuring piece connected with the connecting piece; the connecting piece stretches into the guide plate along the axial direction of the reactor control rod guide cylinder, the number of the measuring pieces is at least two, each measuring piece is arranged around the periphery of the connecting piece, and each measuring piece stretches into the corresponding guide hole so as to measure the abrasion loss of the hole wall of the corresponding guide hole. The at least two measuring pieces are arranged around the periphery of the connecting piece, so that the at least two measuring pieces can respectively extend into different guide holes, abrasion loss of the hole walls of a plurality of guide holes in the guide plate can be measured simultaneously, and the detection efficiency is improved.

Drawings

FIG. 1 is a schematic illustration of a reactor control rod guide tube inspection apparatus according to one embodiment of the present utility model;

FIG. 2 is a schematic illustration of a guide plate within a reactor control rod guide tube;

FIG. 3 is a schematic view of the interior of a connector in a reactor control rod guide tube inspection apparatus according to one embodiment of the present utility model;

FIG. 4 is a schematic view of a measurement pilot hole of a measurement member in a reactor control rod guide tube inspection apparatus according to an embodiment of the present utility model.

Reference numerals:

100-connecting piece; 110-a base; 120-a first driver; 130-a second driver; 140-supporting a cylinder; 150-fixing blocks; 200-connecting arms; 300-measuring piece; 310-a pulse generating receiver; 320-rotating a mirror; 330-a third driver; 340-a body; 350-fixing the cylinder; 360-supporting seat; 370-plugging blocks; 400-guide plates; 410-a central channel; 420-a guide hole; 430-communication channels.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, fig. 1 is a schematic view of a reactor control rod guide tube inspection apparatus according to an embodiment of the present utility model; FIG. 2 is a schematic view of a guide plate within a reactor control rod guide tube. The utility model provides a reactor control rod guide cylinder inspection device, which is used for detecting the abrasion loss of a reactor control rod guide cylinder, wherein the reactor control rod guide cylinder comprises a guide plate 400 used for guiding, a guide hole 420 is arranged on the guide plate, and the reactor control rod guide cylinder inspection device comprises a support frame, a connecting piece 100 arranged on the support frame and a measuring piece 300 connected with the connecting piece 100; the connection member 100 extends into the guide plate 400 along the axial direction of the reactor control rod guide cylinder; the number of the measuring pieces 300 is at least two, each measuring piece 300 is arranged around the outer circumference of the connecting piece 100, and each measuring piece 300 extends into the corresponding guide hole 420 to measure the abrasion amount of the wall of the corresponding guide hole 420.

Specifically, at least two measuring pieces 300 are arranged around the periphery of the connecting piece 100 in the application, so that the at least two measuring pieces 300 can respectively extend into different guide holes 420, and therefore the abrasion loss of the hole walls of a plurality of guide holes 420 in a guide plate 400 can be measured at the same time, and the detection efficiency is improved.

It should be noted that, in this embodiment, the connecting piece 100 is suspended by a hook in the crane, so that the connecting piece 100 can extend from top to bottom into the central channel 410 of the corresponding guide plate 400 from the reactor control rod guide cylinder, that is, the support frame in this embodiment is the crane, and in other embodiments, the support frame may be other components, which only can play a supporting role on the connecting piece 100.

It should be further noted that the reactor control rod guide tube is a tubular structure, a plurality of guide plates 400 are provided along an axial direction thereof, a center channel 410 is provided at a center of the guide plates 400, a plurality of guide holes 420 are provided at the guide plates 400, the guide holes 420 are uniformly spaced around an outer circumference of the reactor control rod guide tube, each guide hole 420 communicates with a corresponding center channel 410 through a communication channel 430, and a portion of the guide holes 420 are aligned in a radial direction of the reactor control rod guide tube and communicate through the communication channel 430. By arranging at least two measuring members 300 around the outer circumference of the connection member 100 such that each measuring member 300 can extend into a different guide hole 420 arranged at intervals around the outer circumference of the reactor control rod guide tube, it is possible to measure the wear amount of the hole walls of at least two guide holes 420 at the same time. In the present embodiment, the number of the guide holes on the guide plate 400 is 24, and the number of the measuring members may be 2, 4, 8 or 16, which is enough to measure the wear of a plurality of guide holes at the same time. In other embodiments, the number of measurement members may be other.

Referring to fig. 1, 2 and 3, fig. 3 is a schematic view illustrating the interior of a connector in a reactor control rod guide tube inspection apparatus according to an embodiment of the present utility model. In one embodiment, the connector 100 is capable of axial rotation about the reactor control rod guide tube relative to the support frame.

Specifically, when the connector 100 is at the current position, each measuring element 300 can extend into one guide hole 420 to measure the corresponding guide hole 420, because the connector 100 can rotate around the axial direction of the reactor control rod guide cylinder relative to the support frame, each measuring element 300 can synchronously rotate with the connector 100 to adjust the position of each measuring element 300 on the plane parallel to the guide plate 400, and the guide plate 400 is provided with a plurality of guide holes 420 uniformly spaced around the periphery of the reactor control rod guide cylinder, each measuring element 300 with changed position can be inserted into another guide hole 420 spaced on the same guide plate 400, so that the plurality of guide holes 420 can be measured simultaneously, and the detection efficiency is improved.

Further, the reactor control rod guide tube inspection device further includes a first driving member 120, the first driving member 120 is connected to the support frame, the connecting member 100 is connected to a power output end of the first driving member 120, and the first driving member 120 is used for driving the connecting member 100 to drive the connecting arm 200 and the measuring members 300 to rotate around an axial direction of the reactor control rod guide tube, so that each measuring member 300 can extend into a different guide hole 420. Preferably, the first driving member 120 is a motor.

It should be noted that the support frame further includes a base 110, the first driving member 120 is connected to the base 110, and the base 110 is connected to a hook of the crane, so as to protect the first driving member 120.

In other embodiments, the support frame may also be configured to rotate the connector 100 axially about the reactor control rod guide tube, such as by rotating a hook in a crane, to effect a change in the position of the measurement member 300.

With continued reference to fig. 1, 2 and 3, in one embodiment, the reactor control rod guide tube inspection apparatus further includes a number of connecting arms 200 corresponding to the number of measuring members 300, each measuring member 300 being connected to the connecting member 100 by a corresponding connecting arm 200, the connecting arms 200 being configured to be capable of telescoping in a radial direction of the reactor control rod guide tube.

Specifically, each of the connection arms 200 extends in a radial direction of the reactor control rod guide cylinder to protrude into the communication channel 430 of the corresponding guide plate 400, and is arranged at intervals around the circumference of the connection member 100, and each of the measurement members 300 is connected to one end of one of the connection arms 200 remote from the support rod. The connection arm 200 can be extended and contracted in the communication channel 430 in the radial direction of the reactor control rod guide cylinder, so that the measuring piece 300 connected to the connection arm 200 can be moved in the radial direction of the reactor control rod guide cylinder to enter the plurality of guide holes 420 in the same radial direction as the guide plate 400, thereby improving the adaptability of the measuring piece 300 to the measurement of the guide holes 420 and improving the measurement efficiency. Preferably, the connector 100 is cylindrical and is adapted to extend into the central channel 410 of the guide plate 400.

Further, the lower end of the connection member 100 has a chamfer so as to facilitate the connection member 100 to protrude into the central passage 410 of the guide plate 400.

Referring to fig. 1, 2 and 4, in one embodiment, fig. 4 is a schematic diagram of a measurement guide hole of a measurement element in a reactor control rod guide tube inspection apparatus according to an embodiment of the present utility model. Each measuring member 300 includes a main body 340 and a pulse generating receiver 310 connected to the main body 340, the main body 340 being connected to the connecting member 100, the pulse generating receiver 310 being configured to emit and receive ultrasonic waves reflected by the wall of the corresponding guide hole 420.

Specifically, the pulse generating receiver 310 is configured to emit ultrasonic waves toward the hole wall of the corresponding guide hole 420, and when the ultrasonic waves encounter the hole wall of the corresponding guide hole 420, the ultrasonic waves are reflected back along the original path and received by the pulse generating receiver 310. By calculating the time of the ultrasonic wave emitted and received by the pulse generating receiver 310, the travel path of the ultrasonic wave can be calculated, and thus the size of the hole wall of the pilot hole 420 in the radial direction of the reactor control rod pilot cylinder can be calculated, thereby obtaining the degree of abrasion of the hole wall of the pilot hole 420. Compared with the method that the camera is used for radially photographing the guide plate 400 on the center of the guide plate 400 and then radially comparing the camera with the test block of the guide plate 400 so as to obtain the abrasion loss of the upper surface of the guide plate 400, the method and the device can obtain the specific abrasion condition of the hole wall of the guide hole 420 in the depth direction, and therefore the measurement accuracy of the device is improved.

Further, the reactor control rod guide cylinder inspection device further comprises a transducer and a display screen, the transducer is respectively connected with the pulse generation receiver 310 and the display screen, the transducer is used for receiving ultrasonic signals received by the pulse generation receiver 310 and converting the ultrasonic signals into electric signals, and the electric signals are displayed through the display screen, so that the size, namely the abrasion loss, of the hole wall of the corresponding guide hole 420 can be visually represented, and the adaptability of the device is improved.

Referring still to fig. 1, 2 and 3, in one embodiment, each measurement member 300 is configured to be movable relative to the support frame in an axial direction of the reactor control rod guide tube.

Specifically, the guide hole 420 has a certain depth in the axial direction of the reactor control rod guide cylinder, and since the measuring piece 300 can move along the axial direction of the reactor control rod guide cylinder relative to the support frame, the measuring piece 300 can move along the depth direction of the guide hole 420, so that each abrasion loss of the guide hole 420 in the depth direction can be measured, and the detection efficiency is improved.

Further, the connecting piece 100 includes a supporting cylinder 140, a fixing block 150 and a second driving piece 130, each connecting arm 200 is connected to an outer wall of the supporting cylinder 140, the supporting cylinder 140 is sleeved on the fixing block 150, the fixing block 150 is connected to a power output end of the first driving piece 120, the second driving piece 130 is connected to the fixing block 150, the supporting cylinder 140 is connected to the power output end of the second driving piece 130, and the second driving piece 130 is used for driving the supporting cylinder 140 to drive the connecting arms 200 and the measuring pieces 300 to move synchronously along an axial direction of the reactor control rod guide cylinder, so that each measuring piece 300 can move along a depth direction of a corresponding guide hole 420 at the same time, and further detection efficiency is improved. Preferably, the support cylinder 140 is slidably coupled to the fixed block 150 in the axial direction of the reactor control rod guide cylinder.

In other embodiments, each measurement member 300 may also be axially movable relative to the connecting arm 200 along the reactor control rod guide tube.

In other embodiments, axial movement of the measurement member 300 along the reactor control rod guide cylinder may be achieved by telescoping the support member along the axis of the reactor control rod guide cylinder, e.g., a hoist rope of a crane may be deployed and retracted.

Referring to fig. 1 and 2, in one embodiment, each measurement member 300 is flush in a plane perpendicular to the axial direction of the reactor control rod guide tube.

Specifically, since each measuring piece 300 is driven by the support cylinder 140 and the connection arm 200 to move along the axial direction of the reactor control rod guide cylinder, the measuring pieces 300 are arranged flush on a plane perpendicular to the axial direction of the reactor control rod guide cylinder, so that each measuring piece 300 can synchronously measure the size of each hole wall of the corresponding guide hole 420 in the depth direction thereof, thereby improving the measurement efficiency.

Referring to fig. 1, 2 and 4, in one embodiment, the measuring device 300 further includes a rotating mirror 320, the rotating mirror 320 is connected to the main body 340, the pulse generating receiver 310 emits ultrasonic waves toward the rotating mirror 320 along the axial direction of the reactor control rod guide tube, and the ultrasonic waves are reflected by the rotating mirror 320 on the walls of the corresponding guide holes 420 along the radial direction of the reactor control rod guide tube.

Specifically, the tilting angle of the rotating mirror 320 is 45 degrees. The axial distance between the pulse generating receiver 310 and the rotating mirror 320 in the reactor control rod guide cylinder is fixed, so that when the abrasion of the hole wall of the guide hole 420 is calculated, the axial distance between the pulse generating receiver 310 and the rotating mirror 320 in the reactor control rod guide cylinder is only required to be subtracted, the corresponding radial dimension of the hole wall of the guide hole 420 in the reactor control rod guide cylinder can be obtained, the mixing of depth information of the guide hole 420 is avoided, the radial dimension of the hole wall of the guide hole 420 can be obtained more accurately, and the measurement precision of the device is improved.

Referring to fig. 1, 2 and 4, in one embodiment, the measuring device 300 further includes a third driving member 330, the third driving member 330 is connected to the main body 340, the rotating mirror 320 is connected to a power output end of the third driving member 330, and the third driving member 330 is used for driving the rotating mirror 320 to rotate around an axial direction of the reactor control rod guide tube.

Specifically, the inclination angle of the rotating mirror 320 is 45 degrees, and thus the angle of the ultrasonic wave reflected on the hole wall of the corresponding guide hole 420 by the rotating mirror 320 is not affected during the rotation of the rotating mirror 320, so that the ultrasonic wave can be emitted along the hole diameter of the guide hole 420 toward the hole wall of the corresponding guide hole 420. And the third driving piece 330 can drive the rotary mirror 320 to rotate around the axial direction of the reactor control rod guide cylinder, so that the direction of the ultrasonic waves emitted by the rotary mirror 320 can be changed, the rotary mirror 320 can reflect the ultrasonic waves around the circumferential direction 360 degrees of the corresponding guide hole 420, and the ultrasonic waves can cover all the hole walls of the corresponding guide hole 420 at a certain depth, thereby improving the measurement efficiency. Preferably, the third driver 330 is a motor.

In other embodiments, the impulse-generating receiver 310 may also rotate in synchronization with the rotating mirror 320. It should be noted that, compared to the manner in which the pulse generating receiver 310 can also rotate synchronously with the rotating mirror 320, only the rotating mirror 320 rotates in the present application, so that the cable connected to the pulse generating receiver 310 can be prevented from winding, thereby improving the reliability of the device.

Referring to fig. 4, in one embodiment, the axis of the ultrasonic wave emitted from the pulse generating receiver 310 toward the rotating mirror 320 coincides with the hole center of the corresponding guide hole 420 in the axial direction of the guide hole 420.

Specifically, the arrangement that the transmitting end of the pulse generating receiver 310 coincides with the hole center of the corresponding guide hole 420 in the axial direction of the guide hole 420, so that the ultrasonic wave transmitted by the pulse generating receiver 310 coincides with the center of the hole wall of the corresponding guide hole 420 in the axial direction of the guide hole 420, the distance from the hole wall of the corresponding guide hole 420 to the hole center in the radial direction can be accurately measured, and thus, the distance is convenient to compare with the original radius size of the guide hole 420, the abrasion loss of the hole wall of the guide hole 420 in all directions can be accurately obtained, and the measurement accuracy of the device is improved.

Referring to fig. 1 and 4, in one embodiment, the main body 340 includes a fixed cylinder 350 connected to the connector 100, a receiving cavity is provided in the fixed cylinder 350, a transmitting end of the pulse generating receiver 310 is received in the receiving cavity, and an axis of an ultrasonic wave emitted from the pulse generating receiver 310 toward the rotating mirror 320 coincides with an axis of the receiving cavity.

Specifically, the rotating mirror 320 is also accommodated in the accommodating cavity, so that the pulse generating receiver 310 and the rotating mirror 320 can be protected, and the axis of the ultrasonic wave emitted by the pulse generating receiver 310 coincides with the axis of the accommodating cavity, so that the distance from the ultrasonic wave reflected by the rotating mirror 320 to the cavity wall of the accommodating cavity is the same, the running stroke of the ultrasonic wave emitted by the cavity wall of the accommodating cavity is certain, the ultrasonic wave of the part can be filtered, the interference to the ultrasonic wave reflected by the hole wall of the corresponding guide hole 420 is reduced, and the measurement accuracy of the device is improved.

Further, the main body 340 further includes a blocking block 370, the blocking block 370 is connected to an end of the fixed cylinder 350 away from the rotating mirror 320, the pulse generating receiver 310 is connected to the blocking block 370, and a portion of one side away from the rotating mirror 320 passes through the blocking block 370 and protrudes out of the blocking block 370, so that the pulse generating receiver is convenient to be connected with an external cable and is convenient to overhaul the cable.

Further, the main body 340 further includes a supporting seat 360, the supporting seat 360 is connected to an end of the fixed cylinder 350 away from the pulse generating receiver 310, and the third driving member 330 is connected to the supporting seat 360.

In addition, the lower end of the fixing cylinder 350 has a chamfer so as to facilitate the fixing cylinder 350 to extend into the guide hole 420.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The reactor control rod guide cylinder inspection device is used for detecting the abrasion loss of a reactor control rod guide cylinder and comprises a guide plate used for guiding, and guide holes are formed in the guide plate;

the connecting pieces extend into the guide plates along the axial direction of the reactor control rod guide cylinder, the number of the measuring pieces is at least two, the measuring pieces are arranged around the periphery of the connecting pieces, and the measuring pieces extend into the corresponding guide holes so as to measure the abrasion loss of the walls of the corresponding guide holes.

2. The reactor control rod guide tube inspection device of claim 1, wherein the connector is rotatable relative to the support frame about an axis of the reactor control rod guide tube.

3. The reactor control rod guide tube inspection device according to claim 1, further comprising a connection arm corresponding to the number of the measuring pieces, each of the measuring pieces being connected to the connection piece by the corresponding connection arm, the connection arm being configured to be retractable in a radial direction of the reactor control rod guide tube.

4. A reactor control rod guide tube inspection apparatus according to any one of claims 1 to 3, wherein each of the measurement members comprises a main body connected to the connector and a pulse generating receiver connected to the main body for transmitting and receiving ultrasonic waves reflected by the corresponding hole wall of the guide hole.

5. The reactor control rod guide tube inspection device of claim 4, wherein each of the measurement members is configured to be movable relative to the support frame in an axial direction of the reactor control rod guide tube.

6. The reactor control rod guide tube inspection device of claim 5, wherein each of the measurement members is flush in a plane perpendicular to an axial direction of the reactor control rod guide tube.

7. The reactor control rod guide tube inspection device of claim 4, wherein the measurement member further comprises a rotating mirror coupled to the body, the pulse generating receiver emitting the ultrasonic waves toward the rotating mirror along an axial direction of the reactor control rod guide tube, the ultrasonic waves being reflected by the rotating mirror along a radial direction of the reactor control rod guide tube onto a wall of the corresponding guide hole.

8. The reactor control rod guide tube inspection device of claim 7, wherein the measurement member further comprises a third drive member coupled to the body, the rotating mirror coupled to a power output of the third drive member, the third drive member configured to drive the rotating mirror to rotate axially about the reactor control rod guide tube.

9. The reactor control rod guide tube inspection device according to claim 8, wherein an axis of the ultrasonic wave emitted from the pulse generating receiver toward the rotary mirror coincides with a hole center of the corresponding guide hole in an axial direction of the guide hole.

10. The reactor control rod guide tube inspection device of claim 8, wherein the main body comprises a fixed tube connected to the connector, a receiving cavity is formed in the fixed tube, a transmitting end of the pulse generating receiver is accommodated in the receiving cavity, and an axis of ultrasonic waves emitted by the pulse generating receiver towards the rotating mirror coincides with an axial direction of the receiving cavity.