A variable stroke small diameter pipe inspection device

Abstract

This invention discloses a variable stroke small-diameter pipe inspection device, comprising: a probe system; a circumferential motion system for driving the probe system to move circumferentially along the inner circumferential surface of the pipe, comprising a fixed base, a rotating base pivotally connected to the fixed base, and a circumferential drive assembly for driving the rotating base to rotate relative to the fixed base; and an axial motion system for driving the probe system to move axially along the pipe, mounted on the rotating base; the rotating base is disposed within the fixed base and coaxially with the fixed base; the circumferential motion system includes a plane bearing connected between the fixed base and the rotating base and located at the rear end of the rotating base, a rotating gear mounted at the front end of the rotating base, and a circumferential motor mounted on the fixed base and extending through its upper and lower end faces, and a fixed gear connected to the circumferential motor and meshing with the rotating gear. This invention requires little installation space, has a relatively large inspection range, can quickly adjust the required stroke of the equipment, and is simple and effective in implementation.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power plant testing equipment, and specifically relates to a small-diameter pipe inspection device with variable stroke. Background Technology

[0002] Currently, pipeline inspection equipment in nuclear power plants is mainly designed with a fixed stroke, meaning the equipment's stroke is designed based on the required stroke of the object being inspected plus a certain design margin. It typically uses supports at both ends, with the middle area being the effective stroke zone. This limits the equipment's operating space, often rendering it ineffective when installation space is insufficient or the required stroke exceeds the design value, necessitating the development of new equipment. In certain situations, such as when there are structures within small-diameter pipes, and their distance from the pipe end varies, while the inspection range needs to be as large as possible and close to these structures, traditional equipment often cannot meet these requirements, or necessitates significant manpower and material costs. Summary of the Invention

[0003] The purpose of this invention is to provide a small-diameter pipe inspection device with variable stroke, which can adjust the probe stroke according to the actual inspection requirements.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a variable stroke small-diameter pipe inspection device, comprising:

[0005] A probe system is used to inspect the entire pipeline from the inside of the pipe wall;

[0006] A circumferential motion system is used to drive the probe system to move circumferentially along the inner circumferential surface of the pipe. It includes a fixed base, a rotating base pivotally connected to the fixed base, and a circumferential drive assembly that drives the rotating base to rotate relative to the fixed base.

[0007] An axial motion system is used to drive the probe system to move axially along the pipe.

[0008] The axial motion system is adjustablely mounted on the rotary seat; the rotary seat passes through the fixed seat and is coaxially arranged with the fixed seat; the circumferential motion system includes a plane bearing connected between the fixed seat and the rotary seat and located at the rear end of the rotary seat, a rotary gear mounted on the front end of the rotary seat, a circumferential motor mounted on the fixed seat and arranged through its upper and lower end faces, and a fixed gear connected to the circumferential motor and meshing with the rotary gear.

[0009] In another embodiment, the fixed base is provided with a plurality of fixed support feet facing circumferentially and a plurality of floating support feet.

[0010] In another embodiment, the floating support foot includes a floating support cylinder and a retractable floating support block disposed on the floating support cylinder. The position of the floating support block is adjusted by filling the floating support cylinder with compressed gas.

[0011] In another embodiment, the axial motion system includes an axial sliding seat fixed to the rotating seat, a crossbeam mounted on the axial sliding seat, a lead screw rotatably connected to the crossbeam, an axial motor driven by and fixed to the crossbeam, a drive nut slidably connected to the crossbeam and threadedly connected to the lead screw, and the probe system is mounted on the drive nut.

[0012] In another embodiment, the probe system includes a probe disk fixed to the drive nut and located on the outer periphery of the crossbeam and the lead screw, a plurality of probes with adaptive angles mounted circumferentially along the probe disk, and a miniature cylinder mounted between the probe disk and the probes.

[0013] In another embodiment, a level and a zero-point sensor are provided on the rear end face of the fixed base, and the line connecting the positions of the level and the zero-point sensor passes through the center of the fixed base.

[0014] In another embodiment, a through-hole for weight reduction is provided on the end face of the rotating gear.

[0015] In another embodiment, the diameters of the weight-reducing holes are different, and the inspection device includes an infrared sensor fixedly mounted on the fixed base and facing the rotating gear. The infrared sensor is located on the rotation path of the weight-reducing hole, and the infrared sensor can determine the circumferential tilt angle of the rotating base based on the detected diameter of the weight-reducing hole.

[0016] In another embodiment, a connecting groove is provided on the side of the crossbeam, and a connecting member is provided on the axial sliding seat. The connecting member cooperates with the connecting groove to adjustably fix the crossbeam on the axial sliding seat.

[0017] In another embodiment, the connecting groove has a large belly and a small opening, and the connecting parts are an adjusting nut and a bolt with a screw head that are slidably connected in the connecting groove. After the bolt passes through the axial sliding seat, it is threadedly connected to the adjusting nut. Tightening the adjusting nut can fix the crossbeam and the axial sliding seat.

[0018] The beneficial effects of the present invention are as follows: the present invention requires little installation space and has a relatively large inspection range; it can quickly adjust the required stroke of the equipment; the implementation method is simple and effective; the infrared sensor can determine the circumferential tilt angle of the rotating seat based on the detected diameter of the weight reduction hole to perform secondary calibration of the level or ensure the normal use of the device when the level fails. Attached Figure Description

[0019] Figure 1 is a front view of the small-diameter pipe inspection device;

[0020] Figure 2 is a schematic diagram of the reverse side of the small-diameter pipe inspection device;

[0021] Figure 3 is Figure 1 Enlarged view of point A in the middle;

[0022] The components are: 1. Axial motor; 2. Circumferential motor; 3. Axial sliding seat; 4. Rotary seat; 5. Floating support foot; 6. Fixed seat; 7. Probe disk; 8. Drive nut; 9. Structure; 10. Pipe; 11. Crossbeam; 12. Lead screw; 13. Level; 14. Fixed support foot; 15. Zero point sensor; 16. Circumferential rotating pin; 17. Probe; 18. Radial rotating pin; 19. Rotary gear; 20. Fixed gear; 21. Miniature cylinder; 22. Planar bearing; 23. Weight reduction hole; 24. Infrared sensor; 111. Connecting groove; 112. Connector; 113. Adjusting nut; 114. Bolt. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0024] like Figure 1-2 As shown, the variable stroke small diameter pipe inspection device includes:

[0025] The probe 17 system is used to inspect the entire pipe 10 from the inside wall of the pipe;

[0026] The circumferential motion system, used to drive the probe 17 system to move circumferentially along the inner circumferential surface of the pipe 10, includes a fixed base 6, a rotating base 4 pivotally connected to the fixed base 6, and a circumferential drive assembly that drives the rotating base 4 to rotate relative to the fixed base 6. The rotating base 4 passes through the fixed base 6 and is coaxially arranged with the fixed base 6. The circumferential motion system includes a plane bearing 22 connected between the fixed base 6 and the rotating base 4 and located at the rear end of the rotating base 4, a rotating gear mounted on the front end of the rotating base 4, and a circumferential motor 2 mounted on the fixed base 6 and extending through its upper and lower end faces, and a fixed gear 20 connected to the circumferential motor 2 and meshing with the rotating gear 19. The fixed base 6 is provided with several fixed support feet 14 facing circumferentially and several floating support feet 5. The floating support feet 5 include a floating support cylinder and a retractable floating support block provided on the floating support cylinder. The position of the floating support block is adjusted by filling the floating support cylinder with compressed gas, generally a flat cylinder. A level 13 and a zero-point sensor 15 are provided on the rear end face of the fixed base. The line connecting the positions of the level 13 and the zero-point sensor 15 passes through the center of the fixed base. A through-hole for weight reduction is provided on the end face of the rotating gear. The diameters of the weight reduction holes are different. The inspection device includes an infrared sensor 24 fixedly mounted on the fixed base and facing the rotating gear. The infrared sensor is located on the rotation path of the weight reduction hole 23. The infrared sensor can determine the circumferential tilt angle of the rotating base 4 based on the detected diameter of the weight reduction hole.

[0027] An axial motion system is used to drive the probe 17 system to move axially along the pipe 10. It is mounted on a rotating seat 4. It includes an axial sliding seat 3 fixed on the rotating seat 4, a crossbeam 11 mounted on the axial sliding seat 3, a lead screw 12 rotatably connected to the crossbeam 11, an axial motor 1 that is driven by the lead screw 12 and fixed on the crossbeam 11, and a drive nut 8 that is slidably connected to the crossbeam 11 and threadedly connected to the lead screw 12. The probe 17 system is mounted on the drive nut 8. The crossbeam 11 has a connecting groove 111 on its side and a connecting piece 112 on its axial sliding seat. The connecting piece 112 cooperates with the connecting groove 111 to adjustably fix the crossbeam on the axial sliding seat 3. The connecting groove 111 has a wide belly and a narrow opening. The connecting piece consists of an adjusting nut 113 and a bolt 114 whose screw head is slidably connected in the connecting groove. The bolt 114 passes through the axial sliding seat 3 and is threadedly connected to the adjusting nut 113. Tightening the adjusting nut 113 fixes the crossbeam 11 and the axial sliding seat 3, while loosening the adjusting nut 113 allows the crossbeam 11 and the axial sliding seat 3 to slide relative to each other, thereby adjusting their relative positions and achieving the purpose of quickly adjusting the required stroke of the equipment.

[0028] The probe 17 system includes a probe disk 7 fixed on the drive nut 8 and located on the outer periphery of the crossbeam 11 and the lead screw 12, several probes 17 mounted circumferentially along the probe disk 7, which achieve adaptive angles through circumferential rotating pins 16 and radial rotating pins 18, and a miniature cylinder 21 mounted between the probe disk 7 and the probes 17.

[0029] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A variable stroke small-diameter pipe inspection device, comprising: A probe system is used to inspect the entire pipeline from the inside of the pipe wall; A circumferential motion system is used to drive the probe system to move circumferentially along the inner circumferential surface of the pipe. It includes a fixed base, a rotating base pivotally connected to the fixed base, and a circumferential drive assembly that drives the rotating base to rotate relative to the fixed base. An axial motion system is used to drive the probe system to move axially along the pipe. Its features are: The axial motion system is adjustablely mounted on the rotary seat; the rotary seat passes through the fixed seat and is coaxially arranged with the fixed seat; the circumferential motion system includes a plane bearing connected between the fixed seat and the rotary seat and located at the rear end of the rotary seat, a rotary gear mounted on the front end of the rotary seat, a circumferential motor mounted on the fixed seat and extending through its upper and lower end faces, and a fixed gear connected to the circumferential motor and meshing with the rotary gear; The axial motion system includes an axial sliding seat fixed to the rotating seat, a crossbeam mounted on the axial sliding seat, a lead screw rotatably connected to the crossbeam, an axial motor that is driven by the lead screw and fixed to the crossbeam, a drive nut that is slidably connected to the crossbeam and threadedly connected to the lead screw, and the probe system is mounted on the drive nut.

2. The variable stroke small-diameter pipe inspection device according to claim 1, characterized in that: The fixed base is provided with several fixed support feet facing the circumference and several floating support feet.

3. The variable stroke small-diameter pipe inspection device according to claim 2, characterized in that: The floating support foot includes a floating support cylinder and a retractable floating support block disposed on the floating support cylinder. The position of the floating support block is adjusted by filling the floating support cylinder with compressed gas.

4. The variable stroke small-diameter pipe inspection device according to claim 1, characterized in that: The probe system includes a probe disk fixed to the drive nut and located on the outer periphery of the crossbeam and the lead screw, a plurality of probes with adaptive angles mounted circumferentially along the probe disk, and a miniature cylinder mounted between the probe disk and the probes.

5. The variable stroke small-diameter pipe inspection device according to claim 1, characterized in that: A level and a zero-point sensor are provided on the rear end face of the fixed base, and the line connecting the positions of the level and the zero-point sensor passes through the center of the fixed base.

6. The variable stroke small-diameter pipe inspection device according to claim 1, characterized in that: The rotating gear has a through-hole for weight reduction.

7. The variable stroke small-diameter pipe inspection device according to claim 6, characterized in that: The diameters of the weight reduction holes are different from each other. The inspection device includes an infrared sensor fixed on the fixed base and facing the rotating gear. The infrared sensor is located on the rotation path of the weight reduction hole.

8. The variable stroke small-diameter pipe inspection device according to claim 1, characterized in that: The crossbeam has a connecting groove on its side, and the axial sliding seat has a connecting member. The connecting member cooperates with the connecting groove to make the crossbeam adjustablely fixed on the axial sliding seat.

9. The variable stroke small-diameter pipe inspection device according to claim 8, characterized in that: The connecting groove has a wide belly and a narrow opening. The connecting parts are an adjusting nut and a bolt with a screw head that are slidably connected in the connecting groove. After the bolt passes through the axial sliding seat, it is threadedly connected to the adjusting nut. Tightening the adjusting nut can fix the crossbeam and the axial sliding seat.

Images