KR102565464B1 - Borescope system having a borescope guide tube for high temperature inspection - Google Patents

Abstract

The present invention includes a borescope having a photographing unit for inspecting a device to be inspected, and a guide tube having a cylindrical shape with one end opened and to which the borescope is mounted toward the opened end, The guide tube has a double tube structure and relates to an endoscope device capable of cooling the borescope while air introduced from the outside flows therein.

Description

Endoscope device including a guide tube for bore scope for inspection of high-temperature parts

The present invention relates to an endoscope device for inspecting a device to be inspected under a high-temperature environment.

Nuclear power generation uses nuclear fuel inside a nuclear reactor to heat the primary cooling water using the energy generated during nuclear fission, transfer energy from the steam generator to the secondary cooling water using the heated energy, and use the generated steam to steam turbines. It refers to a system that converts rotational energy into rotational energy and then produces electricity through a generator.

A nuclear power plant includes a nuclear reactor, a generator, a turbine, piping, etc., and among them, a turbine refers to a mechanical device capable of obtaining rotational force with reaction force using a flow of compressible fluid such as steam or gas.

Since the blades, rotors, vanes, etc. constituting the turbine operate in a corrosive environment with high temperature and humidity, regular inspection (inspection) is required to see if there are any damaged or damaged parts inside the turbine. However, since it is practically difficult to perform inspection after disassembling the assembled turbine, the inspection can be performed using a borescope.

A borescope is a type of industrial endoscope, and is widely used in the field of industrial machinery as a method of inspecting the inside of a device requiring inspection and checking whether or not it is damaged. The use of the borescope has advantages such as not only making it easy to inspect the inside without disassembling the equipment to be inspected, but also quickly inspecting the inside of the machine after it is temporarily stopped. However, since the proper operating temperature of the optical cable included in the borescope is 80℃ or less, accurate inspection is possible only after the temperature of the device to be inspected is lowered to 80℃ or less.

In general, turbines are operated under high temperatures of hundreds of degrees or more, so in order to inspect large gas turbines or steam turbines using a boascope, the operation of the equipment must be stopped for a long time to lower the temperature to 80 degrees or less. There is a problem that makes it difficult to restart the device.

One object of the present invention is to provide a structure of an apparatus capable of easily inspecting the inside of a device without disassembling the device to be inspected.

Another object of the present invention is to provide a structure of a device capable of performing an inspection of a device to be inspected using a borescope even under a high-temperature environment.

In order to achieve one object of the present invention, an endoscope apparatus having a guide tube for a borescope according to an embodiment of the present invention includes a borescope having a photographing unit for inspecting a device to be inspected; and a guide tube having a cylindrical shape with one end opened and to which the borescope is mounted toward the open end, wherein the guide tube has a double pipe structure, and air introduced from the outside is passed through the inside. While cooling the borescope while flowing, the guide tube includes a housing forming an exterior; and an inner frame configured in the shape of a cylindrical tube to accommodate the boascope and to divide the inner space of the housing into different spaces, and an outer surface of the inner frame to facilitate cooling through contact with air. A cooling film is coupled, and a plurality of flow holes are formed in the inner frame to be spaced apart along the longitudinal direction of the inner frame to allow air to flow in and out, and one side of the housing is cut so that the shooting part of the boascope is formed. An inspection part exposing to the outside is formed, and an inner frame opening is formed in the inner frame at a position corresponding to the inspection part so that the photographing part is exposed to the outside.

According to another example of the present invention, the guide tube includes a housing forming an exterior; It may include an inner frame configured in the shape of a cylindrical tube to accommodate the boascope and to divide the inner space of the housing into different spaces.

According to another example of the present invention, an inlet pipe for moving external air toward the inside may be formed on one side of the housing.

According to another example of the present invention, the inner frame may form a first space formed between the housing and a second space where the borescope is located, respectively.

According to another example of the present invention, a plurality of flow holes may be formed in the inner frame to allow air to flow in and out.

According to another example of the present invention, air introduced along the inlet pipe may cool the borescope while moving through a flow hole formed along an outer surface of the inner frame.

According to another example of the present invention, an inspection unit may be formed on one side of the housing so as to be cut so as to expose the photographing unit of the boascope to the outside.

According to another example of the present invention, the inspection part may be formed on the front part or the side part of the housing.

According to another example of the present invention, a processor receiving and processing image information collected from a borescope may be further included.

According to another example of the present invention, the inside of the guide tube for sensing the temperature inside the guide tube, the borescope and optionally a temperature measuring device may be installed.

An endoscope device according to another example of the present invention includes a housing formed of a cylindrical shape having an exterior and having one end opened, and an internal frame mounted inside the housing to divide the internal space of the housing into different spaces. a guide tube provided; a boascope mounted inside the inner frame and having a photographing unit for inspecting a device to be inspected, and a temperature measuring device selectively installed with the boascope; and an inlet pipe installed from one side of the housing toward the inner frame, and outside air is introduced into the inlet pipe to enter a first space formed between the housing and the inner frame and the inside of the inner frame. Each of the formed second spaces is cooled, a cooling film is coupled to the outer surface of the inner frame to facilitate cooling through contact with air, and a plurality of flow holes are provided in the inner frame to allow air to flow in and out of the inner frame. It is formed to be spaced apart along the longitudinal direction of the frame, and on one side of the housing, an inspection part is formed to expose the shooting part of the boascope to the outside by being cut, and the inspection part is formed on the inner frame so that the shooting part is exposed to the outside. An inner frame opening is formed at a position corresponding to .

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The endoscope device having the above structure can inspect the inside of the device to be inspected through the borescope accommodated inside the guide tube and collect image information, thereby facilitating inspection without disassembling the machine to be inspected.

Another object of the present invention is that the guide tube installed to surround the borescope can quickly lower the temperature of the borescope by inhaling cooled air from the outside and flowing it inside, so that the device to be inspected can be inspected even under a high-temperature environment. It is possible to reduce the waiting time to perform inspection using a boascope.

1 is a perspective view showing the appearance of an endoscope device according to an embodiment of the present invention.
FIG. 2 is a longitudinal cross-sectional view showing the inside of the endoscope device of FIG. 1 .
3 is a conceptual diagram of an endoscope device according to an embodiment.
FIG. 4 is a conceptual diagram illustrating an endoscope device according to an embodiment different from that of FIG. 3 .
5 is a flowchart illustrating a process for performing an inspection of a device to be inspected using the present invention.

Hereinafter, an endoscope device related to the present invention will be described in more detail with reference to the drawings.

In this specification, the same or similar reference numerals are given to the same or similar components even in different embodiments, and overlapping descriptions thereof will be omitted.

In addition, a structure applied to one embodiment may be equally applied to another embodiment as long as there is no structural or functional contradiction between different embodiments.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are included. It should be understood to include water or substitutes.

In the following specific details for carrying out the invention, it can be understood that the front, front, and front portions refer to the left side of the drawing, and the rear, rear portion, and rear portion refer to the right side of the drawing. In addition, it can be understood that the upper or upper side means upper in the vertical direction on the drawing, and the lower or lower side means lower in the vertical direction.

1 is a perspective view showing an endoscope apparatus 100 according to an embodiment of the present invention.

The endoscope device 100 according to an embodiment of the present invention can be understood as referring to a borescope 110 system including a borescope 110 as a type of industrial endoscope device.

The bore scope 110 system (hereinafter referred to as an endoscope device) has an advantage of being able to easily inspect the inside without disassembling the inspection target device, and thus is widely used in the field of industrial machinery. However, since the borescope 110, which is one component of the endoscope device 100, can transmit and receive information through an optical cable, it is difficult to operate normally at a high temperature of 80° C. or higher.

The endoscope device 100 according to an embodiment of the present invention may include a borescope 110, a temperature measuring device 130, a guide tube 120, and a processor 140, and the guide tube 120 ) The inside of the device to be inspected is photographed through the bore scope 110 located inside, image information is acquired, and the acquired image information is transmitted to the processor 140 located in the rear part. It is possible to perform inspections of suspected damage without disassembling the device.

At this time, the endoscopic apparatus 100 according to an embodiment of the present invention cools the temperature inside the guide tube 120 to a set temperature or less (eg, 80 ° C or less), which is located inside the guide tube 120 By allowing the borescope 110 to operate normally, it is possible to minimize the downtime of the device to be inspected. Hereinafter, a specific structure of the endoscope device 100 will be described in detail.

FIG. 2 is a cross-sectional view showing the inside of the endoscope device 100 of FIG. 1 , and FIG. 3 is a conceptual diagram showing the appearance of the endoscope device 100 according to an embodiment of the present invention.

The endoscope device 100 according to an embodiment of the present invention may include a bore scope 110, a temperature measuring device 130, a guide tube 120, and a processor 140 as components.

The bore scope 110 and the temperature measuring device 130 are components that can be installed or removed from the inside of the guide tube 120 by an operator in the step of inspecting the device to be inspected. The borescope 110 is a component for inspecting the inside of a device that needs to be inspected and obtaining image information for confirming its damage, and the temperature measuring device 130 measures the internal temperature of the guide tube 120 to obtain a borescope ( 110) is a configuration for checking the operating temperature (for example, a temperature of 80 ° C or less).

For example, the operator inserts the temperature measuring device 130 toward the inside of the opened guide tube 120 and mounts the temperature at which the borescope 110 can be operated (for example, a temperature of 80° C. or less). ), and when it is confirmed that the boascope 110 can be operated normally, the temperature measuring device 130 is removed and the boascope 110 is inserted and mounted so that the inspection target device can be inspected. do. That is, the borescope 110 and the temperature measurement device 130 may be selectively installed in the guide tube 120 by an operator.

The bore scope 110 may be formed in a cylindrical bar shape, and may include a photographing unit 111 for inspecting the inside of a device requiring inspection and confirming damage thereto. A photographing unit 111 may be formed on the front of the borescope 110 . The photographing unit 111 is exposed to the outside through the opening of the inspection unit 125 of the guide tube 120, so that it is possible to take a picture to check whether the device to be inspected is damaged. In addition, an optical cable (not shown) is installed inside the bore scope 110 to transmit/receive status information on the device to be inspected.

The temperature measuring device 130 is a component for measuring the temperature inside the guide tube 120, and a temperature sensor 131 for measuring the temperature may be attached to one side.

The guide tube 120 has a cylindrical shape with one end opened, and the borescope 110 or the temperature measuring device 130 can be inserted or taken out through the opened end.

In addition, the guide tube 120 is made of a double pipe structure, and the temperature of the borescope 110 mounted inside the guide tube 120 can be lowered while air introduced from the outside flows and circulates therein. For example, the guide tube 120 may have a space formed therein to accommodate the borescope 110 or the temperature measuring device 130, and an inner frame inside the cylindrical housing 121 forming the exterior ( 123) may be made of a double pipe structure in which it is accommodated.

The guide tube 120 may include a housing 121, an inner frame 123 dividing the inner space into different spaces, and an inlet pipe 122.

The housing 121 forms the outer appearance of the guide tube 120, and an inner frame 123 may be installed therein.

An inspection unit 125 may be formed on one side of the guide tube 120 to correspond to the location of the photographing unit 111 formed on the borescope 110 . Through the inspection unit 125, the photographing unit 111 of the borescope 110 can be exposed to the outside.

Specifically, an inspection unit 125 may be formed on one side of the housing 121 so that the photographing unit 111 of the borescope 110 is exposed. The inspection unit 125 is formed to be in communication with the outside by cutting the housing 121, and the photographing unit 111 formed in the borescope 110 is exposed to the outside through the inspection unit 125, and the image information of the device to be inspected is exposed. can be obtained.

The inspection unit 125 may be formed on the front and/or upper surface of the housing 121, respectively, and as shown in FIG. 3, in one embodiment of the present invention, the inspection unit 125 is the housing 121 Formed in the front part, it is possible to perform inspection of the device to be inspected through the front part.

The inner frame 123 may be formed in the shape of a cylindrical tube and may serve to support the housing 121 . The inner frame 123 may accommodate the borescope 110 and divide the inner space of the housing 121 into different spaces. The inner frame 123 may form a first space S1 formed between the housing 121 and a second space S2 where the borescope 110 is located.

At this time, a cooling film (not shown) may be coupled to the outer surface of the inner frame 123 to facilitate cooling through contact with air.

A plurality of flow holes 124 may be formed in the inner frame 123 to allow air to flow in and out. After air is introduced from the outside through the inlet pipe 122 installed on one side of the housing 121, the air moves through the flow hole 124 formed along the outer surface of the inner frame 123, so that the inner frame It becomes possible to lower the temperature of the borescope 110 installed inside the 123. At this time, the outside air introduced through the inlet pipe 122 moves along the inlet pipe 122 and then flows into the second space S2 where the inner frame 123 and the borescope 110 are located, It can move to the first space S1 formed between the inner frame 123 and the housing 121 through each flow hole 124 . The movement of air through the flow hole 124 may be performed by the pressure of the air introduced through the inlet pipe 122 .

Each flow hole 124 is formed to pass through the inner frame 123 and may have a circular cross section having a constant diameter. However, since the flow hole 124 only needs to form air flow between the inside and outside of the inner frame 123, there is no particular limitation on its shape, and for example, it is possible to have a rectangular cross section.

Each flow hole 124 may be disposed on the inner frame 123 at regular intervals, and serves to allow air to move between the inside and outside of the inner frame 123 .

As shown in FIG. 3 , the inlet pipe 122 is installed to penetrate the housing 121, and serves to introduce relatively low-temperature air from the outside through it.

Here, the air may mean room temperature air, and may mean air cooled by lowering the temperature through a separate cooling device. At this time, the inflow of air can be made by opening an air intake valve (not shown) installed on one side of the inlet pipe 122, and when the temperature inside the guide tube 120 is about 80 degrees or less, air intake A valve (not shown) may be closed to restrict further air flow.

The inlet pipe 122 may be installed on one side of the housing 121 to move cooled air toward the inside of the guide tube 120 . The inlet pipe 122 penetrates the housing 121 and extends to the inner frame 123 so that relatively low-temperature air can be introduced into the space formed inside the inner frame 123, thereby reducing the temperature of the accommodated space. It may be cooled to a predetermined value or less.

When external air is introduced through the inlet pipe 122, the borescope 110 can be normally operated in a high-temperature environment where the temperature is increased due to the operation of the device to be inspected (eg, the operation of a turbine). It is possible to perform inspections on the device.

A processor 140 receiving image information from the borescope 110 and processing it may be further included.

The processor 140 may be electrically connected to the boascope 110 or the temperature measurement device 130 to generate and transmit a control signal for controlling it, and perform inspection of the device to be inspected through the boascope 110 (eg For example, it is possible to measure the temperature inside the guide tube 120 through the operation of the temperature sensor of the temperature measurement device 130) or the operation of the temperature sensor 130.

At this time, the processor 140 is a component capable of logical operations, and may mean a central processing unit (CPU), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), and the like.

The control command executed by the processor 140 may be stored and utilized in a storage medium, and the storage medium may be a device such as a hard disk drive (HDD), a solid state drive (SSD), a server, a volatile medium, or a non-volatile medium. And it will be possible to store the data needed to perform the work.

FIG. 4 is a conceptual diagram of another embodiment of the endoscope apparatus 200 capable of securing information on a device to be inspected through a side surface unlike FIG. 3 .

The endoscope device 200 according to an embodiment of the present invention may include a borescope 210, a temperature measuring device (not shown), a guide tube 220, and a processor 240, and the endoscope device 200 ) Since the contents of the individual components forming the same as those of FIGS. 1 to 3 described above, they will be omitted within the overlapping range.

As shown in FIG. 4 , the endoscope device 200 may perform an inspection of a device to be inspected through the side portion.

The guide tube 220 may include a housing 221 forming an exterior and an inner frame 223 installed inside the housing 221 . An inspection unit 225 may be formed on the side surface of the housing 221 to be incised and opened to communicate with the outside, and the photographing unit 211 formed on the side surface of the borescope 210 may It becomes possible to perform an inspection on the device to be inspected.

At this time, an internal frame opening 223a is formed at a position corresponding to the inspection unit 225 on the side surface of the internal frame 223, so that image information of the device to be inspected can be collected through the photographing unit 211.

That is, the photographing unit 211 formed in the borescope 210 is exposed to the outside through the inspection unit 225 formed on the side surface of the housing 221 and the inner frame opening 223a formed on the side surface of the inner frame 223. The inside of the device to be inspected can be photographed to obtain image information about it, and by transmitting the obtained image information to the processor 240, it is possible to perform an inspection on the part suspected of being damaged without disassembling the device to be inspected. there will be

5 illustrates a process for performing an inspection of a device to be inspected using the endoscope apparatus 100 or 200 according to an embodiment of the present invention.

The process for performing the inspection of the device to be inspected using the endoscope device (100, 200) is,

Positioning the endoscope device (100, 200) on the device to be inspected (S10), installing the temperature measuring device (130, 230) inside the guide tube (120, 220) (S20), inlet pipe (122, 222) to introduce outside air into the guide tubes 120 and 220 (S30), remove the temperature measuring devices 130 and 230 and install the bore scopes 110 and 210 (S40), It may be composed of a step (S50) of acquiring image information about the device to be inspected through the operation of the bore scopes 110 and 210.

The step of positioning the endoscope apparatus 100 or 200 on the device to be inspected (S10) refers to a step of positioning the endoscope apparatus 100 or 200 adjacent to a region requiring inspection of the device to be inspected.

In the step of installing the temperature measuring devices 130 and 230 inside the guide tubes 120 and 220 (S20), the bore scopes 110 and 210 located inside the guide tubes 120 and 220 operate normally under a high temperature environment. This is a step for measuring the internal temperature through the temperature measuring devices 130 and 230. Inside the guide tubes 120 and 220, it is possible to mount the temperature measuring devices 130 and 230 instead of the bore scopes 110 and 210, and the guide tubes 120 and 220 through the temperature measuring devices 130 and 230. ) After checking whether the temperature inside the borescope (110, 210) is normally operating temperature (for example, 80 ℃ or less), it can be operated.

In the step of introducing external air into the guide tubes 120 and 220 through the inlet pipes 122 and 222 (S30), the inlet pipe 122 formed in the housing 121 and 221 of the endoscope device 100 and 200 222) to form the inside temperature of the guide tubes 120 and 220 below a certain temperature (for example, below 80 ° C.) It is for

In the step of removing the temperature measuring devices 130 and 230 and installing the bore scopes 110 and 210 (S40), the inside of the guide tubes 120 and 220 is seen by the flow of external air introduced into the inside through the inlet pipe. This refers to a step of mounting the bore scopes 110 and 210 to inspect a device to be inspected when the scopes 110 and 210 are at a temperature at which they can normally operate.

Acquiring image information about the device to be inspected through the operation of the boascope (110, 210) (S50) is the damage of the device to be inspected through the boascope (110, 210) installed inside the guide tube (120, 220). It refers to the step of obtaining image information about the suspicious part, and the acquired image information is transmitted to the processors 140 and 240, so that it is possible to determine whether or not the device to be inspected is damaged.

What has been described above is only the embodiments for carrying out the endoscopic apparatus according to the present invention, and the present invention is not limited to the above embodiments, and as claimed in the following claims, the scope that does not depart from the gist of the present invention Anyone with ordinary knowledge in the field to which the invention pertains within the technical spirit of the present invention to the extent that various changes can be made.

100: endoscope device
110: Boascope
111: shooting unit
120: guide tube
121: housing
122: inlet pipe
123: inner frame
124: floating hole
125: inspection unit
130: temperature measuring device
140: processor

Claims (11)

Boa scope having a photographing unit for inspecting the device to be inspected; and
It is made of a cylindrical shape with one end opened and includes a guide tube to which the borescope is mounted toward the opened end,
The guide tube is made of a double tube structure, and the air introduced from the outside cools the borescope while flowing inside,
The guide tube,
a housing forming an exterior; and
It is made in the shape of a cylindrical tube and includes an inner frame that accommodates the borescope and divides the inner space of the housing into different spaces,
A cooling film is coupled to the outer surface of the inner frame to facilitate cooling through contact with air,
In the inner frame, a plurality of flow holes are formed spaced apart along the longitudinal direction of the inner frame to allow air to flow in and out,
On one side of the housing, an inspection unit configured to be incised and exposed to the outside of the shooting unit of the boascope is formed,
The endoscope apparatus according to claim 1 , wherein an inner frame opening is formed in the inner frame at a position corresponding to the inspection part so that the photographing part is exposed to the outside.
delete According to claim 1,
An endoscope device characterized in that an inlet pipe for moving external air toward the inside is formed on one side of the housing.
According to claim 1,
The endoscope apparatus according to claim 1 , wherein the inner frame forms a first space formed between the housing and a second space where the borescope is located.
delete According to claim 3,
The endoscope apparatus according to claim 1 , wherein air introduced along the inlet pipe cools the borescope while moving through a flow hole formed along an outer surface of the inner frame.
delete According to claim 1,
The inspection unit is an endoscope device, characterized in that formed on the front or side of the housing.
According to claim 1,
The endoscope device further comprises a processor receiving and processing the image information collected from the borescope.
According to claim 1,
The endoscope apparatus according to claim 1 , wherein a temperature measuring device for sensing the temperature inside the guide tube and optionally a temperature measuring device is installed inside the guide tube.
A guide tube having a housing formed of a cylindrical shape with an open end and an outer frame mounted inside the housing to divide the internal space of the housing into different spaces;
a boascope mounted inside the inner frame and having a photographing unit for inspecting a device to be inspected, and a temperature measuring device selectively installed with the boascope; and
An inlet pipe installed from one side of the housing toward the inner frame,
External air is introduced into the inlet pipe to cool a first space formed between the housing and the inner frame and a second space formed inside the inner frame, respectively;
A cooling film is coupled to the outer surface of the inner frame to facilitate cooling through contact with air,
In the inner frame, a plurality of flow holes are formed spaced apart along the longitudinal direction of the inner frame to allow air to flow in and out,
On one side of the housing, an inspection unit configured to be incised and exposed to the outside of the shooting unit of the boascope is formed,
The endoscope apparatus according to claim 1 , wherein an inner frame opening is formed in the inner frame at a position corresponding to the inspection part so that the photographing part is exposed to the outside.

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