Endoscopic detection tool suitable for fusion reactor cold shield cooling pipe

Abstract

The invention discloses an endoscopic detection tool suitable for a fusion reactor cold shield cooling tube, which comprises an endoscope, the rear end of an endoscope lens is in butt joint and fixed with the front end of a guide soft spring, the rear end of the guide soft spring is in butt joint and fixed with the front end of a threading hard spring, and a lens cable penetrates through the guide soft spring and the threading hard spring and then is connected with an endoscope display. A head protection ball is sleeved on the front end of a lens, a tail power ball is sleeved on the front end of a threading hard spring, each middle guide ball is sleeved on a guide soft spring, a gas blocking ring is screwed in a tail end opening of a straight pipe section of a three-way joint, a front butt joint pipe is screwed in a front end opening of the straight pipe section, and the threading hard spring penetrates through the front butt joint pipe, the straight pipe section and the gas blocking ring. The port of the inclined pipe section of the three-way connector is in butt joint with the manual valve, and the manual valve is in butt joint with one end of the air source connector. The endoscopic detection tool for the cooling pipe can be used for detecting the inner surface of the cooling pipe of a fusion reactor cold shield with high bending complexity and long length, can reduce scratches on the inner wall of the pipe, and can ensure 100% detection coverage rate.

Description

Technical Field

[0001] This invention relates to the field of complex pipeline production equipment, and more specifically to an endoscopic inspection tool suitable for cooling tubes of fusion reactor cold shields. Background Technology

[0002] After the cooling tubes on the fusion reactor cold shield are bent and welded, the inner wall surface of the cooling tubes needs to be inspected. Due to the high complexity of the bending and the long length of the cooling tubes on the cold shield, the existing Bourdon tube endoscope, with its integral rigid spring from front to back, cannot smoothly pass through the highly complex cooling tubes. After the Bourdon tube endoscope penetrates into the cooling tube for about 8m, the resistance will increase sharply. As the resistance increases, it will become increasingly difficult for the Bourdon tube endoscope to penetrate into the cooling tube, thus making it impossible to complete a 100% inspection of the inner wall of the cooling tube. Furthermore, the probability of the inner wall of the cooling tube being scratched by the tip of the endoscope during the forced penetration of the cooling tube will greatly increase. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an endoscopic inspection tool for fusion reactor cold screen cooling tubes that can be used to inspect the inner surface of the tubes with high bending complexity and long length, and can greatly reduce the probability of scratches on the inner wall of the tubes and ensure 100% inspection coverage.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows: an endoscopic inspection tool suitable for cooling tubes of fusion reactor cold shields, characterized in that it includes: an endoscope, a guide spring, a threading spring adapted to the lens cable of the endoscope, a head protection ball, a tail power ball, several intermediate guide balls, a T-connector, an air baffle ring, a front connecting pipe, a manual valve, and an air source connector. The rear end of the endoscope lens is fixedly connected to the front end of the guide spring, and the rear end of the guide spring is fixedly connected to the front end of the threading spring. The lens cable of the endoscope passes through the guide spring and the threading spring and is connected to the endoscope display. The head protection ball is fixedly mounted on the front end of the lens, and the tail power ball is fixedly mounted on the front end of the threading spring. Each intermediate guide ball is fixed to a guide spring at intervals. A baffle ring is screwed into the tail end of the straight pipe section of the tee connector. The front connecting pipe is screwed into the front end of the straight pipe section of the tee connector. The threaded hard spring moves from front to back, passing through the front connecting pipe, the straight pipe section of the tee connector, and the baffle ring in sequence. The inclined pipe section of the tee connector is connected to one end of the manual valve. The other end of the manual valve is connected to one end of the air source connector. The other end of the air source connector is used to connect to an air source. The air outlet direction of the inclined pipe section of the tee connector is towards the front end of the straight pipe section. The maximum outer diameter of each ball is smaller than the inner diameter of the cooling pipe to be tested. The inner diameter of the front connecting pipe is larger than the outer diameter of the cooling pipe to be tested, so that the front connecting pipe can be fitted onto the port of the cooling pipe to be tested.

[0005] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, each ball is a nylon ball, the inner diameter of each ball is smaller than the outer diameter of the object it is fitted with, each ball is fitted together after being mechanically expanded in diameter, and after fitting together, each ball will slowly shrink in diameter and hug the object it is fitted with.

[0006] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, the head protection ball and the lens tip are fixed together with adhesive, the tail power ball and the front end of the threaded hard spring are fixed together with adhesive, and the middle guide ball and the guide soft spring are fixed together with adhesive.

[0007] Furthermore, in the aforementioned endoscopic inspection tool for the cooling tubes of a fusion reactor cold shield, the rear end of the lens is connected to the front end of the guide spring by a front metal sleeve. The rear end of the lens is inserted into the front port of the front metal sleeve and fixed with glue. The front end of the guide spring is inserted into the rear port of the front metal sleeve, and the rear port of the front metal sleeve is reduced in diameter by a tooling to bite the front end of the guide spring.

[0008] Furthermore, in the aforementioned endoscopic inspection tool for the cooling tubes of a fusion reactor cold shield, the rear end of the guide spring and the front end of the threaded hard spring are connected by a rear metal sleeve. The front end of the rear metal sleeve bites the inserted rear end of the guide spring by means of a tooling diameter reduction, and the rear end of the rear metal sleeve bites the inserted front end of the threaded hard spring by means of a tooling diameter reduction.

[0009] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, the spacing between adjacent spheres increases sequentially from front to back.

[0010] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, the manual valve is a jog valve.

[0011] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, the outer diameter of the guide spring is 6mm, and the outer diameter of the threaded hard spring is 8mm.

[0012] Furthermore, in the aforementioned endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield, the front and rear edges of the inner ring of the baffle ring are both designed as arc surfaces that reduce friction with the threaded hard spring.

[0013] The advantages of this invention are as follows: the fusion reactor cold shield cooling tube endoscopic inspection tool is equipped with a guide spring, three intermediate guide balls, and a head protection ball, which allows the lens to pass smoothly through the fusion reactor cold shield cooling tube with high bending complexity and long length; the head protection ball, tail power ball, and three intermediate guide balls greatly reduce the probability of scratching the inner wall of the tube; and because intermittent gas supply can be achieved through a manual valve, the tail power ball can creep forward under the action of high-pressure gas, and the endoscope lens can gradually penetrate deeper into the tube under the action of the tail power ball, thereby achieving 100% coverage of the inside of the inspection tube. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the endoscopic inspection tool applicable to the cooling tubes of a fusion reactor cold shield. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0016] like Figure 1 As shown, an endoscopic inspection tool suitable for cooling tubes of a fusion reactor cold shield includes: an endoscope 1, a short section of a guide spring 2, a threading rigid spring 3 adapted to the lens cable of the endoscope 1, a head protection ball 4, a tail power ball 5, three intermediate guide balls 6, a T-connector 7, an air baffle ring 8, a front connecting pipe 9, a manual valve 10, and an air source connector 11. The rear end of the lens 15 of the endoscope 1 is fixedly connected to the front end of the guide spring 2, and the rear end of the guide spring 2 is fixedly connected to the front end of the threading rigid spring 3. The lens cable of the endoscope 1 passes through the guide spring 2 and the threading rigid spring 3 and is connected to the display of the endoscope 1. The head protection ball 4 is fixedly mounted on the front end of the lens 15, and the tail power ball 5 is fixedly mounted on the front end of the threading rigid spring 3. The intermediate guide balls 6 are spaced apart. Fixed to the guide spring 2, a baffle ring 8 is screwed into the tail port of the straight pipe section 12 of the tee connector 7. The front connecting pipe 9 is screwed into the front port of the straight pipe section 12 of the tee connector 7. The wire-threading hard spring 3 moves from front to back and passes through the front connecting pipe 9, the straight pipe section 12 of the tee connector 7, and the baffle ring 8 in sequence. The port of the inclined pipe section 13 of the tee connector 7 is connected to one end of the manual valve 10. The other end of the manual valve 10 is connected to one end of the air source connector 11. The other end of the air source connector 11 is used to connect to the air source. The air outlet direction of the inclined pipe section 13 of the tee connector 7 is towards the front port of the straight pipe section 12. The maximum outer diameter of each ball is smaller than the inner diameter of the cooling pipe to be tested. The inner diameter of the front connecting pipe 9 is larger than the outer diameter of the cooling pipe to be tested, so that the front connecting pipe 9 can be fitted onto the port of the cooling pipe to be tested.

[0017] In this embodiment, each ball is a nylon ball, and the inner diameter of each ball is smaller than the outer diameter of the object it is fitted onto. Each ball is mechanically expanded before being fitted together. After fitting, each ball slowly shrinks in diameter to hug the object it is fitted onto. In this embodiment, after the balls shrink in diameter, the head protection ball 4 and the front end of the lens 15 are further glued together, the front end of the tail power ball 5 and the threaded rigid spring 3 are also glued together, and the middle guide ball 6 and the guide soft spring 2 are also glued together.

[0018] The rear end of the lens 15 is connected to the front end of the guide spring 2 via a front metal sleeve 14. The rear end of the lens 15 is inserted into the front port of the front metal sleeve 14 and fixed with glue. The front end of the guide spring 2 is inserted into the rear port of the front metal sleeve 14, and the rear port of the front metal sleeve 14 is narrowed by a tool to bite the front end of the guide spring 2. The rear end of the guide spring 2 is also connected to the front end of the threading spring 3 via a rear metal sleeve 16. The front port of the rear metal sleeve 16 is narrowed by a tool to bite the inserted rear end of the guide spring 2, and the rear port of the rear metal sleeve 16 is narrowed by a tool to bite the inserted front end of the threading spring 3.

[0019] The spacing between adjacent balls increases progressively from front to back, which improves the guiding effect of each intermediate guide ball 6. The manual valve 10 is a jog valve, which facilitates operation.

[0020] The outer diameter of the guide spring 2 is 6mm, and the outer diameter of the threading spring 3 is 8mm. This arrangement is more conducive to testing.

[0021] The front and rear edges of the inner ring of the air deflector 8 are both designed as arc surfaces to reduce friction with the threaded hard spring.

[0022] During operation, the lens 15 of endoscope 1, the guide spring 2, the head protection ball 4, the tail power ball 5, and the three intermediate guide balls 6 are all inserted into the cooling tube of the fusion reactor cold shield to be tested. The gap between the tail power ball 5 and the cooling tube is 1-2 mm. The front connecting pipe 9 is fitted onto the port of the cooling tube to be tested. The other end of the gas source connector 11 is connected to the gas source. The head protection ball 4 protects the lens 15. The guide spring 2 and the three intermediate guide balls 6 guide the lens. The wire-threading hard spring 3 protects the lens cable. The gas-blocking ring 8 blocks the gas to reduce leakage of high-pressure gas from the rear end of the straight pipe section 12. This ensures that the gas entering the tee connector 7 pushes the tail power ball 5 forward. The gas is intermittently supplied through the manual valve 10. Under the action of high-pressure gas, the tail power ball 5 can creep forward. The lens 15 of endoscope 1 can gradually penetrate deeper into the pipe under the action of the tail power ball 5, thereby achieving 100% coverage of the inside of the test tube.

Claims

1. An endoscopic inspection tool suitable for cooling tubes of a fusion reactor cold shield, characterized in that: include: The system includes an endoscope, a guide spring, a rigid spring for connecting the endoscope's lens cable, a head protection ball, a tail power ball, several intermediate guide balls, a tee connector, an air baffle ring, a front connecting pipe, a manual valve, and an air supply connector. The rear end of the endoscope lens is fixed to the front end of the guide spring, and the rear end of the guide spring is fixed to the front end of the rigid spring. The endoscope's lens cable passes through the guide spring and the rigid spring and connects to the endoscope monitor. The head protection ball is fixed to the front end of the lens, the tail power ball is fixed to the front end of the rigid spring, and the intermediate guide balls are fixed to the guide spring at intervals. A tee connector is also included. An air-blocking ring is screwed into the tail end of the straight pipe section. The front connecting pipe is screwed into the front end of the straight pipe section of the tee connector. A threaded hard spring moves from front to back, passing through the front connecting pipe, the straight pipe section of the tee connector, and the air-blocking ring in sequence. The inclined pipe section of the tee connector is connected to one end of the manual valve, and the other end of the manual valve is connected to one end of the air source connector. The other end of the air source connector is used to connect to an air source. The air outlet direction of the inclined pipe section of the tee connector is towards the front end of the straight pipe section. The maximum outer diameter of each ball is smaller than the inner diameter of the cooling pipe to be tested, and the inner diameter of the front connecting pipe is larger than the outer diameter of the cooling pipe to be tested, so that the front connecting pipe can be fitted onto the port of the cooling pipe to be tested.

2. The endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1, characterized in that: Each ball is made of nylon, and the inner diameter of each ball is smaller than the outer diameter of the object it is attached to. Each ball is mechanically expanded before being attached to the object. After attachment, each ball will slowly shrink in diameter and hug the object it is attached to.

3. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The head protection ball and the front end of the lens are glued together, the tail power ball and the front end of the threading hard spring are glued together, and the middle guide ball and the guide soft spring are glued together.

4. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The rear end of the lens is connected to the front end of the guide spring by a front metal sleeve. The rear end of the lens is inserted into the front port of the front metal sleeve and fixed with glue. The front end of the guide spring is inserted into the rear port of the front metal sleeve, and the rear port of the front metal sleeve is reduced in diameter by a tooling to bite the front end of the guide spring.

5. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The rear end of the guide spring and the front end of the threading spring are connected by a rear metal sleeve. The front end of the rear metal sleeve bites the rear end of the inserted guide spring by means of a tooling reduction in diameter, and the rear end of the rear metal sleeve bites the front end of the inserted threading spring by means of a tooling reduction in diameter.

6. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The distance between each adjacent ball increases sequentially from front to back.

7. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The manual valve is a jog valve.

8. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The outer diameter of the guide spring is 6mm, and the outer diameter of the threaded hard spring is 8mm.

9. An endoscopic inspection tool for cooling tubes of a fusion reactor cold shield according to claim 1 or 2, characterized in that: The front and rear edges of the inner ring of the air deflector are both designed as arc surfaces to reduce friction with the threaded stiff spring.

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