CN109192344B - Opening mechanism for detecting probe in long and narrow space - Google Patents
Opening mechanism for detecting probe in long and narrow space Download PDFInfo
- Publication number
- CN109192344B CN109192344B CN201811014680.7A CN201811014680A CN109192344B CN 109192344 B CN109192344 B CN 109192344B CN 201811014680 A CN201811014680 A CN 201811014680A CN 109192344 B CN109192344 B CN 109192344B
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- opening mechanism
- cylinder
- connecting rods
- camera
- hinged
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a detecting probe opening mechanism in a long and narrow space, which comprises a supporting part, an opening mechanism and a camera module, wherein an opening is formed in the side wall of the supporting part, the opening mechanism is installed in the supporting part, and the camera module is connected to the opening mechanism and can extend out of and retract from the opening. The opening mechanism comprises an air cylinder and a multi-link mechanism hinged with the supporting part, and the camera assembly is fixed on the multi-link mechanism. The invention can prevent the problem that the camera cannot be recovered due to the failure of the cylinder and the like, and improve the safety of the detection process; the detection reliability and safety of the guide card of the control rod guide cylinder of the nuclear power station are improved; the camera is supported by the plurality of support connecting rods, so that the shaking of the camera when the camera is opened is reduced; the double-acting cylinder is adopted for transmission, and the connection and the control are stable and convenient.
Description
Technical Field
The invention relates to a probe opening mechanism for detection in a long and narrow space.
Background
The control rod guide cylinder comprises an upper guide cylinder and a lower guide cylinder, wherein all levels of guide clamps and continuous guide assemblies in the guide cylinder are used for guiding the control rod, and after the components are operated for a long time, inner holes and contact belts of the guide clamps and the continuous guide assemblies are easily abraded due to sliding friction and vibration influence, so that the control rod is not guided, and the rod falling time is out of tolerance, even a rod clamping event occurs. In nuclear power units which operate abroad for more than 20 years, failure events of internals of a plurality of units occur. French nuclear power plants found much wear of control rod guide cylinders in pressurized water reactor nuclear power plants operating for nearly 30 years and started to be replaced on a large scale, about 430 groups of control rod guide cylinder assemblies have been replaced by the french electric power group (EDF) since 2010. Inspection of control rod guide cylinders is listed in the United states as a necessary inspection item for prolonging the life of nuclear power units.
The U.S. invention patent with the patent number of US005078955 discloses a control rod guide cylinder detection system, which is mainly a camera transmission device, and comprises a motor, a screw rod and the like, wherein the extension and retraction of a camera are realized through two sections of reverse threads on the screw rod, however, the problem of inconvenient disassembly exists, which brings inconvenience to the installation, debugging and maintenance of equipment, and the time of exposure of workers to radioactive environment is prolonged; the screw drive is adopted, and a longer screw rod is needed, so that the structure is more complex and the installation is inconvenient. Therefore, it is necessary to design a camera opening structure which has a simple structure and is convenient to mount and dismount.
Disclosure of Invention
The invention aims to provide an opening mechanism for a detection probe in a long and narrow space, which has a simple structure and is convenient to mount and dismount.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an in long and narrow space inspection probe opening mechanism, it includes that the lateral wall is equipped with the open-ended supporting part, install in opening mechanism in the supporting part and connect in opening mechanism and can follow the camera module that the opening stretches out and withdraws, the supporting part includes the support section of thick bamboo that is located the top and the direction head that is located the below, opening mechanism includes that at least a set of upper end articulates in the support section of thick bamboo and the lower tip with the first connecting rod of camera module looks hinge, same group the upper and lower position of first connecting rod sets up, opening mechanism still include upper end with respectively with the middle part of first connecting rod looks hinge second connecting rod, be used for promoting the action of second two poles and take the first connecting rod stretch out or withdraw the connecting plate and be used for driving the cylinder of connecting plate up-and-down motion, the lower tip of second connecting rod with the connecting plate looks hinge.
Preferably, the first connecting rods are two groups and are respectively hinged with two sides of the camera module.
Preferably, the connecting plate is L-shaped, the transverse plate below the connecting plate is fixedly connected with the piston rod of the cylinder, and the longitudinal plate above the connecting plate is connected in the supporting part in a vertically sliding manner.
Furthermore, the cylinder body of the cylinder is positioned in the guide head, the piston rod of the cylinder is positioned in the support cylinder, and a reset tension spring is arranged between the transverse plate and the guide head.
Preferably, the side wall of the supporting cylinder is provided with a foreign matter prevention baffle.
Preferably, the opening mechanism further comprises a camera mounting plate disposed between the first connecting rod and the camera module.
The invention has the beneficial effects that: the invention can avoid the generation of falling objects, prevent foreign matters from entering the control rod guide cylinder and improve the safety margin; the problem that the camera cannot be retracted due to failure of the cylinder and the like can be prevented, and the safety of the detection process is improved; the detection reliability and safety of the guide card of the control rod guide cylinder of the nuclear power station are improved; the camera is supported by the plurality of support connecting rods, so that the shaking of the camera when the camera is opened is reduced; the double-acting air cylinder is adopted for transmission, so that the connection and the control are stable and convenient; the equipment installation time of the nuclear power station during in-service inspection is reduced, and the in-service inspection efficiency is improved, so that the radiation dose to personnel is reduced; when the cylinder fails, the camera module can be automatically retracted by means of gravity and cannot be clamped on the control rod guide card; can be directly installed on the nondestructive testing device of the control rod guide card, and is convenient to disassemble.
Drawings
FIG. 1 shows the state of the retraction of the opening mechanism of the guide card of the control rod of the reactor
FIG. 2 shows the opening state of the opening mechanism of the reactor control rod guide card nondestructive testing device
FIG. 3 is a schematic longitudinal cross-sectional view of a camera opening mechanism of a nondestructive testing device for a reactor control rod guide card
In the figure: 1. the device comprises a support part, 1-1 support cylinders, 1-2 foreign matter prevention baffles and 1-3 guide heads; 2. the device comprises an opening mechanism, a 2-1 cantilever pin shaft, a 2-2 first connecting rod, a 2-3 second connecting rod, a 2-4 pin shaft, a 2-5 camera mounting plate, a 2-6 connecting plate and a 2-7 double-acting air cylinder, wherein the opening mechanism is arranged on the cantilever pin shaft; 3. a camera module is provided.
Detailed Description
The invention is described in detail below with reference to embodiments shown in the drawings to which:
as shown in fig. 1/2/3, the opening mechanism 2 for detecting probe in narrow space includes a supporting part 1 with an opening on its side wall, an opening mechanism 2 installed in the supporting part 1, and a camera module 3 connected to the opening mechanism 2 and capable of extending out and retracting from the opening,
the supporting part 1 comprises a supporting cylinder 1-1 positioned above and a guide head 1-3 positioned below, the opening mechanism 2 comprises at least one group of first connecting rods 2-2, the upper end parts of the first connecting rods are hinged in the supporting cylinder 1-1, the lower end parts of the first connecting rods are hinged with the camera module 3, second connecting rods 2-3, the upper end parts of the second connecting rods are hinged with the middle parts of the first connecting rods 2-2 respectively, connecting plates 2-6 used for pushing the second connecting rods to move and driving the first connecting rods 2-2 to extend or retract, air cylinders used for driving the connecting plates 2-6 to move up and down, and camera mounting plates 2-5 arranged between the first connecting rods 2-2 and the camera module 3. The same group of the first connecting rods 2-2 is arranged at the upper and lower positions, two groups of the first connecting rods 2-2 are respectively hinged with the two sides of the camera module 3, and the lower end parts of the second connecting rods 2-3 are hinged with the connecting plates 2-6. The connecting plates 2-6 are L-shaped, the transverse plate below the connecting plates is fixedly connected with the piston rod of the air cylinder, and the longitudinal plate above the connecting plates is connected in the supporting part 1 in a vertically sliding manner. The cylinder body of the cylinder is positioned in the guide head 1-3, the piston rod of the cylinder is positioned in the support cylinder 1-1, and a reset tension spring is arranged between the transverse plate and the guide head 1-3. The side wall of the supporting cylinder 1-1 is provided with a foreign matter prevention baffle 1-2.
The support part 1 is used for supporting the opening mechanism 2, consists of a support cylinder 1-1, a foreign matter prevention baffle 1-2 and a guide head 1-3, is connected to the control rod guide card nondestructive testing device, and is used for installing the opening mechanism 2. The foreign matter prevention baffle 1-2 is welded at the opening of the arm of the support cylinder 1-1 to prevent foreign matters from falling down and entering the control rod guide cylinder; the guide head 1-3 is connected to the bottom of the support cylinder 1-1 through threads, guides the camera opening mechanism 2 and protects a double-acting cylinder 2-7 at the front end of the opening mechanism 2.
The opening mechanism 2 is used for extending out of the camera module 3 and comprises a cantilever pin shaft 2-42-1, a first connecting rod 2-2, a second connecting rod 2-3, a pin shaft 2-4, a camera mounting plate 2-5, a connecting plate 2-6 and a double-acting cylinder 2-7. The cantilever pin shaft 2-42-1 is fixed on the wall of the support cylinder 1-1; one end of a first connecting rod 2-2 is connected to a cantilever pin shaft 2-42-1, and the other end is connected to a camera mounting plate 2-5 through a pin shaft 2-4; one end of the second connecting rod 2-3 is connected to the middle part of the first connecting rod 2-2 through a pin shaft 2-4, and the other end is connected to the connecting plate 2-6 through a pin shaft 2-4; the connecting plate 2-6 is L-shaped, one end face of which is fixedly connected with a push rod of the double-acting cylinder 2-7; the double-acting air cylinder 2-7 is fixed on the bottom section of the support cylinder 1-1 and is used for providing power for opening the camera module 3.
The camera module 3 is used for video inspection of the control rod guide card and consists of a protective shell, an end cover, a camera end cover, an LED lamp, light-transmitting glass and a clamp spring. The protective shell is fixed on the camera module 3 mounting plate; the camera is fixed in the protective shell and is packaged by a camera end cover; the LED lamp is fixed at the front end of the camera and provides illumination for video inspection of the control rod guide card; the light-transmitting glass is clamped at the front end of the camera through the clamp spring.
During detection, the opening mechanism 2 of the camera of the reactor control rod guide card nondestructive detection device is arranged on the nondestructive detection device of the control rod guide card, the nondestructive detection device is driven to enable the opening mechanism 2 to be placed above the detected guide card and enable the opening direction of the camera module 3 to face the detected hole, and the opening mechanism 2 is driven to drive the double-acting cylinder 2-7 to enable the camera to align to the detected hole to start detection. After one detected hole is detected, the nondestructive testing device rotates 90 degrees, and the other detected hole is detected until 4 detected holes are detected. And the double-acting air cylinder 2-7 is retracted, so that the opening mechanism 2 is contracted to an initial state, and the nondestructive testing device extends downwards to the next guide card for continuous testing.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (4)
1. An opening mechanism for a detection probe in a long and narrow space is characterized in that: the opening mechanism comprises at least one group of first connecting rods, wherein the upper end parts of the first connecting rods are hinged in the supporting cylinder, the lower end parts of the first connecting rods are hinged with the upper part and the lower part of the first connecting rods, the same group of first connecting rods are arranged in the upper part and the lower part, the opening mechanism also comprises second connecting rods, connecting plates and cylinders, the upper end parts of the second connecting rods are hinged with the middle parts of the first connecting rods, the connecting plates are used for pushing the second connecting rods to move and driving the first connecting rods to extend or retract, the cylinders are used for driving the connecting plates to move up and down, the lower end parts of the second connecting rods are hinged with the connecting plates, and cantilever pin shafts are fixed on the wall of the supporting cylinder; one end of the first connecting rod is connected to the cantilever pin shaft, and the other end of the first connecting rod is connected to the camera mounting plate through the pin shaft; one end of the second connecting rod is connected to the middle part of the first connecting rod through a pin shaft, the other end of the second connecting rod is connected to a connecting plate through a pin shaft, the connecting plate is L-shaped, a transverse plate below the connecting plate is fixedly connected with a piston rod of the air cylinder, and a longitudinal plate above the connecting plate is connected into the supporting part in a vertically sliding mode; the cylinder body of the cylinder is positioned in the guide head, the piston rod of the cylinder is positioned in the support cylinder, and a reset tension spring is arranged between the transverse plate and the guide head.
2. The opening mechanism of the inspection probe in the narrow and long space, according to claim 1, wherein: two groups of first connecting rods are hinged with two sides of the camera module respectively.
3. The opening mechanism of the inspection probe in the narrow and long space, according to claim 1, wherein: and the side wall of the supporting cylinder is provided with a foreign matter preventing baffle.
4. An opening mechanism for a test probe in an elongated space, according to claim 1, wherein: the opening mechanism further comprises a camera mounting plate arranged between the first connecting rod and the camera module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811014680.7A CN109192344B (en) | 2018-08-31 | 2018-08-31 | Opening mechanism for detecting probe in long and narrow space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811014680.7A CN109192344B (en) | 2018-08-31 | 2018-08-31 | Opening mechanism for detecting probe in long and narrow space |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109192344A CN109192344A (en) | 2019-01-11 |
| CN109192344B true CN109192344B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811014680.7A Active CN109192344B (en) | 2018-08-31 | 2018-08-31 | Opening mechanism for detecting probe in long and narrow space |
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| Country | Link |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207263698U (en) * | 2017-09-27 | 2018-04-20 | 鞍钢股份有限公司 | Ultrasonic flaw detection device for circular arc area on steel rail head |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078955A (en) * | 1989-06-14 | 1992-01-07 | Westinghouse Electric Corp. | Control rod guide tube inspection system |
| CN105810267B (en) * | 2014-12-30 | 2017-11-28 | 中核武汉核电运行技术股份有限公司 | Face ultrasonic inspection apparatus is passed through in a kind of nuclear reactor pressure container adapter friendship |
| CN206409819U (en) * | 2017-01-18 | 2017-08-15 | 上海润品工贸有限公司 | A kind of pipe video detects robot |
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2018
- 2018-08-31 CN CN201811014680.7A patent/CN109192344B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207263698U (en) * | 2017-09-27 | 2018-04-20 | 鞍钢股份有限公司 | Ultrasonic flaw detection device for circular arc area on steel rail head |
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| CN109192344A (en) | 2019-01-11 |
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