Airtight gap detection system and method

Abstract

Provided is an airtight gap detection system, including a hoisting assembly, a detection device and a wireless operation module. The hoisting assembly is arranged at the top of the annular gap, including a track and a running device arranged on the track; the detection device is connected to the running device and is arranged to be able to move up and down in the annular gap, including a plurality of arc-shaped measuring pieces, a transmission device and a detection assembly. The arc-shaped measuring pieces are used to abut against the outer peripheral side of the reactor pressure vessel cylinder and the inner peripheral side of the insulation layer. The transmission device includes a telescopic member and a motor. The telescopic member is connected to the arc-shaped measuring piece. The motor provides a driving force for the radial movement of the telescopic member. The detection assembly includes a displacement sensor for obtaining the radial telescopic size of the telescopic member; the wireless operation module is connected to the detection device and the hoisting assembly in a two-way signal connection, and is used to perform logical judgment, collect signals and issue command signals. Also provided is an airtight gap detection method. The above system and method can realize automated and numerical inspection of the gap.

Description

Technical Field

[0001] The present invention relates to the field of measurement, and in particular to the field of airtight gap detection. Background Art

[0002] The existing method for checking the airtight gap between the metal reflective insulation of the reactor pressure vessel and the straight section of the reactor pressure vessel cylinder is to first make a check gauge based on the gap between the two, and use manual traction to perform a pass inspection on the detected area. This technology uses the size of the gauge to check whether the gap passes or fails, and cannot measure the precise gap value. Summary of the invention

[0003] An object of the present invention is to provide an airtight gap detection system.

[0004] The airtight gap detection system for achieving the above-mentioned purpose is used to detect the annular gap between the reactor pressure vessel cylinder and the insulation layer, including a lifting assembly, a detection device and a wireless operation module. The lifting assembly is arranged at the top of the annular gap, including a track and a running device arranged on the track; the detection device is connected to the running device and is configured to be able to move up and down in the annular gap, including a plurality of arc-shaped measuring pieces, a transmission device and a detection assembly. The plurality of arc-shaped measuring pieces are respectively used to abut against the outer peripheral side of the reactor pressure vessel cylinder and the inner peripheral side of the insulation layer. The transmission device includes a telescopic part and a motor. The telescopic part is connected to the arc-shaped measuring pieces. The motor provides a driving force for the radial movement of the telescopic part. The detection assembly includes a displacement sensor. The displacement sensor is used to obtain the radial telescopic size of the telescopic part; the wireless operation module is connected to the detection device and the lifting assembly by two-way signals, and is used to perform logical judgment, collect signals and issue command signals.

[0005] In one or more embodiments, the transmission device also includes a transmission table, a transmission block and a transmission rod, and the motor is used to drive the transmission rod to rotate; the transmission table is threadedly connected to the transmission rod; the transmission block abuts against the outer periphery of the transmission table and is connected to the telescopic member.

[0006] In one or more embodiments, the motor is connected to the transmission rod via a transmission structure and a connecting rod.

[0007] In one or more embodiments, the track is circumferentially arranged around the reactor pressure vessel cylinder, and the lifting assembly further includes a connecting rope, and the detection device is connected to the operating device via the connecting rope.

[0008] In one or more embodiments, the detection assembly further includes a pressure sensor disposed on the connecting rope.

[0009] In one or more embodiments, the detection device includes a main body, the arc-shaped measuring piece is circumferentially arranged on the outer periphery of the main body, the main body includes a top cover, a support plate and a middle support device, the support plate is arranged at the end of the middle support device for supporting the motor, and the top cover is provided with a hanging ring.

[0010] In one or more embodiments, the detection assembly further includes an image monitoring device for acquiring an image of the annular gap.

[0011] In one or more embodiments, the video monitor is disposed at the bottom of the detection device.

[0012] In one or more embodiments, the wireless operation module includes a motor drive control submodule, a displacement control submodule, a tension travel control submodule, a camera monitoring submodule, and a track operation device control submodule.

[0013] Another object of the present invention is to provide an airtight gap detection method, which includes the following steps: setting a standard tension value; connecting the detection device to an operating device via a connecting rope; allowing the operating device to move on the track to a circumferential position, lowering the connecting rope, and placing the detection device into the annular gap; starting the motor to control the radial movement of the telescopic member so that a pair of arc-shaped measuring pieces are respectively against the outer circumferential side of the reactor pressure vessel cylinder and the inner circumferential side of the insulation layer; when the tension fed back by the tension sensor is lower than the standard tension value, stopping the falling, controlling the motor to drive the telescopic member, so that the arc-shaped measuring piece is radially retracted until the detection device can continue to fall; after completing the size measurement of the annular gap at the circumferential position, driving the operating device to continue moving on the track to the next circumferential position, and continuing to complete the size measurement of the annular gap in the entire circumference.

[0014] In one or more embodiments, an image monitoring device is used to collect, feed back, and record gap images during the falling process.

[0015] In one or more embodiments, a wireless operation module is used to control the walking position of the operating device on the track, the falling of the connecting rope, and the starting of the motor, and the wireless operation module is used to record the telescopic size of the telescopic member.

[0016] The above-mentioned airtight gap detection system and method can realize the numerical inspection of the metal reflective insulation of the reactor pressure vessel and the airtight gap of the reactor pressure vessel cylinder. Through the data transmitted in real time by detection components such as tension sensors and image monitoring devices, and in conjunction with radially retractable arc-shaped measuring pieces, the detection device of the detection system can adjust its own posture in real time within the annular gap and transmit gap size information, thereby completing the automated and numerical inspection of the annular gap, especially for deep annular gap measurement environments that are difficult to enter, the size of the annular gap area can be measured intuitively, safely and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a schematic diagram of the annular gap;

[0019] Figure 2A It is a schematic diagram of the detection principle of the detection device in the annular gap;

[0020] Figure 2B It is a schematic diagram of the circumferential detection principle of the detection device;

[0021] Figure 3 It is the main schematic diagram of the airtight gap detection system;

[0022] Figure 4 It is a schematic diagram of the connection structure between the main body and the arc-shaped measuring piece;

[0023] Figure 5 It is a schematic diagram of the detection process of the airtight gap detection system. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0025] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0026] like Figure 1 As shown, the insulation layer 100 is disposed on the outer peripheral side 201 of the reactor pressure vessel 200, and an annular gap A is defined between the insulation layer 100 and the outer peripheral side of the reactor pressure vessel 200. The reactor pressure vessel 200 includes a portion above the ground B and a portion below the ground B. The insulation layer is disposed in the portion below the ground and has a deeper depth, so that the area of ​​the annular gap A is deeper and narrower, and is difficult to measure.

[0027] The annular gap A needs to be of sufficient size to achieve better thermal insulation performance. Therefore, it is necessary to measure the annular gap A efficiently, safely and accurately.

[0028] The airtight gap detection system disclosed in the present invention is used to detect the annular gap A between the reactor pressure vessel cylinder and the insulation layer, and specifically to detect whether the size of the annular gap A meets the requirements. Figures 2A to 5 It is understood that the detection system includes a hanging assembly 10 , a detection device 20 and a wireless operation module 60 .

[0029] Specifically, the hanging assembly 10 includes a track 11 and a running device 12. The track 11 is preferably composed of multiple detachable parts to facilitate transportation, assembly and disassembly in the room. The running device 12 can run on the track 11. Figure 4 In the specific embodiment shown, the hoisting assembly 10 also includes a hook 13, a connecting rope 14, etc.

[0030] exist Figure 1 and Figure 2A In the illustrated embodiment, the track 11 is disposed at the top of the annular gap A, above the ground B, and supported by a support member 112 disposed on the ground B. One installation method is: firstly install the support member 112, the support member 112 is integrally and firmly supported on the ground B, and the support member 112 supports the track 11. Then, the running device 12, the connecting rope 14, the hook 13, etc. are installed on the track 11.

[0031] The detection device 20 is connected to the operating device 12 through the connecting rope 14 and the hook 13. The detection device 20 is configured to be able to move up and down in the annular gap A with the help of the connecting rope 14. Figure 2A The volume of the detection device 20 is smaller than the size of the annular gap A, so it can move up and down in the annular gap A. With the help of the operating device 12, the detection device 20 can also move circumferentially, such as Figure 2B As shown, after the detection is completed, it moves to the location of the detection devices 20 ′, 20 ″, thereby completing the full detection of the ring.

[0032] Detection device 20 refers to Figure 2A , Figure 3 and Figure 4 It is understood that the detection device 20 includes a plurality of arc-shaped measuring pieces 30, a transmission device 40 and a detection assembly 50. The detection device 20 includes a main body 201 and a plurality of arc-shaped measuring pieces 30 arranged on the outer peripheral side of the main body 201. Figure 3 and Figure 4 In the illustrated embodiment, the main body 201 is the thick line portion, which is cylindrical, and the arc-shaped measuring pieces 30 are circumferentially distributed on the outer peripheral side of the main body 201 .

[0033] The main body 201 includes a top cover 21, a support plate 22, a middle support device 23, and a support device bottom plate 24. A lifting ring 25 is provided on the top cover 12, which is connected to the connecting rope 14. The support plate 22 is provided on the top of the middle support device 23 to support components such as the motor 41. The support plate 22 also supports a displacement sensor 53. The middle support device 23 is a main support component, and a plurality of guide devices 26 are provided on the inner wall. The support device bottom plate 24 is provided on the bottom surface of the middle support device 23, and is provided with detection components 50 such as a camera gap monitoring device 52.

[0034] The arc-shaped measuring piece 30 is used to abut against the outer peripheral side 201 of the reactor pressure vessel cylinder and the inner peripheral side 101 of the insulation layer, respectively. Figure 2A As shown, the size of the annular gap A is determined. Preferably, a plurality of arc-shaped measuring pieces 30 are arranged circumferentially, so that even if the detection device 20 rotates, there are always two arc-shaped measuring pieces 30 against the outer circumference 201 of the reactor pressure vessel 200 and the inner circumference of the insulation layer 100 .

[0035] The transmission device 40 is used to adjust the extension position of the arc measuring piece 30, and includes a telescopic member 42 and a motor 41. The telescopic member 42 is connected to the arc measuring piece 30, and the motor 41 provides a driving force for the radial movement of the telescopic member 42, where the radial direction refers to the radial direction of the main body 20.

[0036] The driving relationship between the motor 41 and the telescopic member 42 can be Figure 4 The structure shown is realized. The transmission device 40 includes a transmission round table 43, a transmission block 44 and a transmission rod 45, which serve as a force transmission structure.

[0037] The motor 41 is connected to the transmission rod 45 through the transmission structure 411 and the connecting rod 410, and is used to drive the transmission rod 45 to rotate around its own axis. The transmission round table 43 is threadedly connected to the transmission rod 45, so that the rotation of the transmission rod 45 can realize the movement of the transmission round table 43 in the up and down directions by means of the thread. The transmission block 44 abuts against the outer periphery of the transmission round table 43 and is connected to the telescopic member 42. Since the transmission round table 43 has different diameters, the transmission block 44 is pushed to realize radial movement by means of the up and down movement of the transmission round table 43.

[0038] Therefore, the transmission table 43 serves as the main driving component, and the transmission block 44 serves as the secondary driving component. The secondary driving component is driven by the main driving component to drive the telescopic member 42 to telescopically move. The telescopic member 42 itself has a variable length, which in turn drives the multiple arc-shaped measuring pieces 30 to produce radial movement and adjust the radial extension length.

[0039] The function of the displacement sensor 53 is to measure the telescopic size of the telescopic member 42 through measurement and algorithm, and then calculate the size of the annular gap between the insulation layer 100 and the reactor pressure vessel cylinder, and has the functions of feedback and recording.

[0040] In addition, the detection assembly 50 also includes a tension sensor 51, which is arranged on the connecting rope 14 and is used to obtain the force applied to the detection device 20 when it descends. When the actual tension of the detection device fed back by the tension sensor 51 is lower than the standard tension value, it indicates that the radial length of the arc-shaped measuring piece 30 exceeds the maximum size of the annular gap A at this time, and a jam occurs at this position, which causes the tension value to decrease. In the jammed state, the detection device 20 cannot continue to descend.

[0041] The detection assembly 50 also includes an image monitoring device 52, which is arranged on the support device bottom plate 24 of the detection device and is used to obtain an image of the annular gap, provide image information for the downlink of the detection device 20, and assist in judging the downlink state and the gap state.

[0042] The system also includes a wireless operation module 60, such as Figure 4 As shown, it includes a motor drive control submodule 61, a displacement control submodule 62, a tension travel control submodule 63, a camera monitoring submodule 64, a track operation device control submodule 65, a centralized control submodule 66, etc. The above modules can be directly displayed on the handheld operation panel. The above modules can be linked through the centralized control submodule 66 and can perform logical judgment.

[0043] The tension travel control submodule 63 of the wireless operation module 60 is signal-connected to the tension sensor 51 , the video monitoring submodule 64 is signal-connected to the image monitoring device 52 , the motor drive control submodule 61 is signal-connected to the motor 41 , and the displacement control submodule 62 is signal-connected to the displacement sensing device 53 .

[0044] The motor drive control submodule 61 sets a standard gap detection value, and establishes linkage with the tension travel control submodule 63 and the like. The tension travel control submodule 63 sets a standard tension value.

[0045] The operation process of the wireless operation module 60 is introduced below.

[0046] First, set the standard gap value, standard tension and initial value of the running position, as well as the order of the sub-measurement positions in the annular measurement area, such as Figure 2B The annular measurement area is divided into four quadrants.

[0047] The handheld wireless operating panel sends a signal through the track operating device control submodule 65 to make the operating device 12 of the hoisting assembly 10 run along the track 11 to the set circumferential detection position, which is located above the annular gap A. The tension travel control submodule 63 is used to make the detection device 20 carry the arc-shaped measuring piece 30 to the initial position of the airtight gap detection, and check the standard tension value and the initial travel position fed back by the tension sensor 5.

[0048] The image monitoring device 52 at the bottom of the detection device is obtained through the video monitoring submodule 64, and the video gap monitoring collection, feedback, and comparison operations are performed to enable automatic, linkage, feedback, and recording functions such as tension, operation, gap adjustment, and video monitoring.

[0049] The motor drive control submodule 61 is operated to drive the motor 41 to move, and the transmission rod 45 is driven to rotate through the transmission structure 411 and the connecting rod 410, and the transmission round table 43 is driven to move up and down along the guide device 26. Subsequently, the transmission round table 43 pushes the telescopic member 42 to move radially, and drives the transmission block 44 to move radially, so that the arc measuring piece 30 reaches the set standard gap measurement size.

[0050] The track operation device control submodule 65 is used to control the connecting rope 14 to move downward, and the detection device 20 is lowered in the annular gap A.

[0051] The track running device control submodule 65 is used to control the connecting rope 14 to run downward, so that the detection device 20 continues to descend. When the tension travel control submodule 63 detects that the tension fed back by the tension sensor 51 exceeds the standard tension value, it indicates that the radial length of the arc measuring piece 30 exceeds the maximum size of the annular gap A here, and a jam occurs. The detection device needs to stop traveling, and the tension value, travel position, etc. at this time are recorded. The camera monitoring submodule 64 of the wireless operating panel is linked to collect, feedback, and compare the camera gap at this position.

[0052] After the detection device 20 stops descending, the motor drive control submodule 61 drives the motor 41 and the transmission device to move together, adjust the arc measuring piece 30, and make it retract radially, so as to reduce the detection standard size of the arc measuring piece 30. When the wireless tension of the handheld wireless operating panel and the tension feedback of the travel sensor device control module are normal, the adjustment of the detection size of the detection device is stopped, and the radial position information and the detection size value of the arc measuring piece 30 transmitted by the displacement sensor device 53 are obtained through the displacement control submodule 62.

[0053] That is, when the detection device descends to a point where the gap is smaller than the standard gap, the automatic and linkage functions such as tension, camera monitoring, gap adjustment, and operation are operated to reduce the initial standard gap value and continue to run downward after passing the obstruction position.

[0054] Then, the detection device 20 continues to be lowered, passes through the jammed area, and continues to detect the size of the annular gap A.

[0055] After passing the jammed area, the motor drive control submodule 61 is used to drive the motor 41 to work, so that the arc-shaped measuring piece 30 can restore the standard detection size of the detection device. The image monitoring device 52 is used to determine whether all the positions to be detected in the annular gap A have been completely detected.

[0056] After all the tests are completed, the motor drive control submodule 61 is operated to adjust the detection size of the detection device to the minimum size value of this detection process. The track operation device control submodule 65 is used to control the connecting rope 14 to lift the detection device up to a safe position, and the tension sensor 51 signal obtained by the tension travel control submodule 63 is used to return the detection device to the initial detection position.

[0057] Continue to drive the operating device 12 to run along the track 11, so that the detection device rotates along the circumference of the reactor pressure vessel 200, runs to the next detection position of the set value, continues to descend, and repeats the above steps to detect the airtight gap.

[0058] When the airtight gap detection work is completed according to the set process, the detection report is read through the centralized control submodule 66 to realize the automatic and numerical inspection of the airtight gap.

[0059] In combination with the introduction of the above-mentioned detection system, it can also be connected to an airtight gap detection method, which includes the following steps: setting a standard tension value; connecting the detection device to the operating device through a connecting rope; making the operating device move on the track to a circumferential position, dropping the connecting rope, and placing the detection device into the annular gap; starting the motor, controlling the radial movement of the telescopic part, so that a pair of arc-shaped measuring pieces are respectively against the outer circumferential side of the reactor pressure vessel cylinder and the inner circumferential side of the insulation layer; when the tension fed back by the tension sensor is lower than the standard tension value, stopping the falling, controlling the motor to drive the telescopic part, so that the arc-shaped measuring piece is radially retracted until the detection device can continue to fall; after completing the size measurement of the annular gap at the circumferential position, driving the operating device to continue moving on the track to the next circumferential position, and continuing to complete the size measurement of the annular gap in the entire circumference.

[0060] During the falling process, a wireless operating module is preferably used to wirelessly control the walking position of the operating device on the track, the falling of the connecting rope, and the starting of the motor. The wireless operating module is used to record the telescopic size of the telescopic part, and cooperate with the image monitoring device to collect and feedback the gap image in real time until all inspections are completed.

[0061] The above method can realize the automated and numerical inspection of the metal reflective insulation of the reactor pressure vessel and the airtight gap of the reactor pressure vessel cylinder. The wireless operation process is flexible and controllable. As an airtight gap inspection process, it has the advantages of high efficiency, intuitiveness and safety.

[0062] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0063] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. The airtight gap detection system is used to detect the annular gap between the reactor pressure vessel cylinder and the insulation layer, characterized in that: include: A hoisting assembly is arranged at the top of the annular gap, and comprises a track and a running device arranged on the track; a detection device connected to the operating device and configured to be able to move up and down in the annular gap, comprising a plurality of arc-shaped measuring pieces, a transmission device and a detection assembly, wherein at least one pair of the arc-shaped measuring pieces is used to respectively abut against the outer peripheral side of the reactor pressure vessel cylinder and the inner peripheral side of the insulation layer, the transmission device comprises a telescopic member and a motor, the telescopic member is connected to the arc-shaped measuring piece, the motor provides a driving force for the radial movement of the telescopic member, and the detection assembly comprises a displacement sensor, and the displacement sensor is used to obtain the radial telescopic dimension of the telescopic member; as well as A wireless operation module, connected to the detection device and the hoisting assembly by two-way signals, for performing logical judgment, collecting signals and issuing command signals; The track is circumferentially arranged around the reactor pressure vessel cylinder, the lifting assembly also includes a connecting rope, the detection device is connected to the operating device via the connecting rope, the detection assembly also includes a pressure sensor arranged on the connecting rope, the detection assembly also includes an image monitoring device for acquiring an image of the annular gap, and the image monitoring device is arranged at the bottom of the detection device.

2. The airtight gap detection system according to claim 1, characterized in that: The transmission device also includes a transmission truncated table, a transmission block and a transmission rod, the motor is used to drive the transmission rod to rotate; the transmission truncated table is threadedly connected to the transmission rod; the transmission block abuts against the outer periphery of the transmission truncated table and is connected to the telescopic member.

3. The airtight gap detection system according to claim 2, characterized in that: The motor is connected to the transmission rod via a transmission structure and a connecting rod.

4. The airtight gap detection system according to claim 1, characterized in that: The detection device includes a main body, the arc-shaped measuring piece is circumferentially arranged on the outer periphery of the main body, the main body includes a top cover, a support plate and a middle support device, the support plate is arranged at the end of the middle support device for supporting the motor, and the top cover is provided with a hanging ring.

5. The airtight gap detection system according to claim 1, characterized in that: The wireless operation module includes a motor drive control submodule, a displacement control submodule, a tension travel control submodule, a camera monitoring submodule, and a track operation device control submodule.

6. The airtight gap detection method is characterized in that: The method is performed using the airtight gap detection system according to any one of claims 1 to 5, and comprises the following steps: Set the standard tension value; Connect the detection device to the operating device via a connecting rope; Make the running device move on the track to a circumferential position, lower the connecting rope, and place the detection device into the annular gap; Starting the motor to control the radial movement of the telescopic member so that the pair of arc-shaped measuring pieces are respectively pressed against the outer peripheral side of the reactor pressure vessel cylinder and the inner peripheral side of the thermal insulation layer; When the tension fed back by the tension sensor is lower than the standard tension value, the falling is stopped, and the motor is controlled to drive the telescopic member to radially retract the arc-shaped measuring piece until the detection device can continue to fall; After completing the size measurement of the annular gap at the circumferential position, the driving device continues to move on the track to the next circumferential position to continue to complete the size measurement of the annular gap in the entire circumference.

7. The airtight gap detection method according to claim 6, characterized in that: During the falling process, an image monitoring device is used to collect, feedback and record gap images.

8. The airtight gap detection method according to claim 6, characterized in that: The wireless operation module is used to control the walking position of the operating device on the track, the falling of the connecting rope, and the starting of the motor, and the wireless operation module is used to record the telescopic size of the telescopic member.

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