JPH07922Y2 - In-pipe inspection camera device - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) This invention is an in-pipe inspection camera effective for inspecting internal conditions of a sewer pipe, a gas pipe, a water pipe, etc. with a television camera. Regarding the device.

(Prior Art) There is an in-pipe inspection camera device that inspects the inside of a water pipe or the like by intruding a television camera using an element using a solid-state image sensor. This device is usually handled by incorporating a solid-state image sensor camera in a cylindrical housing, attaching the device to the tip of a cable, and pushing it into the tube.

(Problems to be Solved by the Invention) Although the above-described conventional in-pipe inspection camera device is downsized as the diameter of the pipe is reduced, the distance between the internal parts is also reduced. On the other hand, an illumination device has to be built in, and heat from the illumination device has a great influence on the solid-state imaging device camera. That is, the heat generated from the lighting device often raises the temperature of the internal space, heats the solid-state image sensor, etc., and significantly deteriorates the image on the monitor. The kneading shortens the time when the camera device can be used, and when the image is disturbed, it is necessary to cut off the power supply for a while and provide a cooling period, which lowers the work efficiency.

Therefore, an object of the present invention is to provide a camera device for in-pipe inspection, which is capable of preventing adverse effects of heat of a lighting device and which is suitable for in-pipe inspection.

[Structure of the Invention] (Means for Solving the Problem) The present invention has a substantially spherical outer shape, and a main body having a mask surface on one side in one axial extension direction and a camera cable on the other side, and the main body. A solid-state imaging device camera device that is internally housed and disposed at a substantially central position of the spherical shape, and has an optical system directed to the mask surface direction, and the solid-state imaging device for illuminating a direction in which the solid-state imaging device camera device images. A lighting device disposed around the element camera device at a distance, and a heat generated by lighting arranged such that a tank portion is located on the outer periphery of the lighting device and between the lighting device and the solid-state imaging device camera device. And a cooling tank device for absorbing
The structure is simple and effective cooling is achieved without changing the outer shape.

(Operation) By the above means, since the main body has a spherical shape, it is easy to pass through the curved pipe, so that frictional heat can be reduced and the cooling effect by the cooling tank can be obtained.
Even if it is used for a long time, the image is not disturbed and the working efficiency can be improved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an exploded sectional view of an embodiment of the present invention.

The outer shape of the main body 100 of this camera device is spherical, and a temporary surface 12 forming a part of a spherical surface is attached to one axial end and a cable 13 for camera control and power supply is attached to the other end. Has been derived. In the cable 13, FRP (glass reinforced fiber) is arranged on the shaft core, and the cable 13 has appropriate rigidity and flexibility.

The mask 12 is attached to the metal ring 121 so that a plurality of arcuate metal rods 123 are arranged in a lattice shape, and an image of the outside can be taken from the inside of the main body through the mask 12. Body
100 becomes spherical when the mask 12, the central frame 14, and the back frame 15 are integrated, and the back frame 15 holds the end of the previous cable 13. The cable 13 is attached to the back frame 15 so as to be tightened by the clamp nut 16. In this case, a rubber packing 17 is interposed between the clamp nut 16 and the fixed portion for waterproofing. The plate 23 attached to the inside of the back frame 15
It is used as a holding part for the electric wire derived from.

A lighting and tank frame 20 is attached to the inside of the central frame 14 like an inner ring. Ring-shaped packings 21 and 22 are arranged at a plurality of locations between the outer periphery of the frame 20 for illumination and tank and the inner periphery of the central frame 14.

The axial end portion of the lighting / tank frame 20 and the back frame 15 are integrated by a plurality of screws 18. Also in this case, the packing 19 is interposed between the lighting / tank frame 20 and the back frame 15 to prevent water from entering.

Packing on the outer and inner circumferences of the lighting and tank frame 20
Ring-shaped cooling tanks 25 and 26 are arranged between 21 and 22, respectively. The cooling tanks 25 and 26 are connected at a place where there is no lighting device. The cooling tank 25 is closed by a screw 27 from the outside of the central frame 14.
By removing 27, the cooling liquid inside can be replaced. Further, lighting devices 30 for irradiating the side of the temporary surface 12 are attached to the lighting and tank frame 20 at a plurality of locations in parallel with the axis. Further, a transparent glass 31 attached to the frame 20 is located in front of the lighting fixture 30, and is fixed by a waterproof adhesive.

The camera frame 40 is coaxially inserted in the hollow of the above-mentioned lighting and tank frame 20 on the axial center side, and the optical system is directed to the temporary surface 12 side. A packing is also interposed between the outer periphery of the camera frame 40 and the lighting and tank frame 20. Inside the camera frame 40, a glass 41, an optical system 42, an optical filter 43, and a solid-state image pickup device section 44 that constitute the camera are arranged in order from the temporary surface 12 side, and the solid-state image pickup section 4
Photoelectric conversion is performed in 4 and a television signal can be obtained. This television signal is displayed on the monitor screen through the transmission line in the cable 13. Further, FIG. 3 shows a view of this camera device as seen from the front, side and back.

The in-pipe inspection camera device according to the present invention is configured as described above.

Water is injected into the cooling tanks 25 and 26, for example. The material of each frame is, for example, aluminum. Comparing the heat capacities of water and aluminum, the specific heat of water 4.2J / g, ° K The specific heat of aluminum 0.88J / g, ° K J: Joule (unit of heat), g: Gram (weight), ° K: Absolute A unit of temperature.

Density 1 g / cm ³ aluminum specific gravity 2.56 g / cm ³ of unit volume per water heat capacity of water ^{4.21 × 1 = 4.21J / cm 3} ° K unit heat capacity per volume of aluminum ^{0.88 × 2.56 = 2.2J / cm 3} ° It becomes K. Therefore, if the volume is the same, the specific heat of water is about twice that of aluminum. This means that if the water tank is built in, the usage time of the camera device can be extended without causing image distortion. When the water in the tank is heated, the screw 27 can be removed and the warm water inside can be extracted and discarded. After that, if cold water is injected, the camera can be used again. Further, by discarding the warm water and then spraying a cooling spray agent or the like, the inside of the camera device can be cooled to a low temperature in a short time. When the water temperature in the tank rises, the pressure may rise, but in this case, the pressure is not a problem because it is relatively low. If pressure is a problem, it can be avoided by adjusting the sealing material of the screw 27. As described above, the present camera device can suppress the disturbance of the image due to the influence of the heat of the lighting device on the solid-state imaging device camera by incorporating the cooling tank. In addition, since the outer shape is spherical, smooth movement is possible when inserting or pulling out from a curved pipe 4a or a pipe with a step 4b as shown in Fig. 4, and heat due to friction is greatly reduced. This is also effective for preventing image distortion and improving work efficiency. Furthermore, the cable 13 has appropriate rigidity and flexibility.
The workability is extremely good because the FRP cable is used. It should be noted that the actual diameter of the outer sphere is about 85 mm, although it is enlarged in FIG. 1 for the sake of clarity.

[Advantages of the Invention] As described above, according to the present invention, it is possible to obtain an in-pipe inspection camera device that can prevent adverse effects of heat of the illumination device and that is suitable for in-pipe inspection.

[Brief description of drawings]

1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an exploded sectional view showing an embodiment of the present invention, and FIG. 3 is a front view and a side view of an embodiment of the present invention. FIG. 4 is a rear view and FIG. 4 is a view showing an example of use of the devised device. 100 …… Main body, 12 …… Mask, 13 …… Cable, 14 …… Center frame, 15 …… Back frame, 16 …… Clamp nut, 17 …… Rubber packing, 18,27 …… Screw, 19,21, twenty two
...... Packing, 20 …… Lighting and tank frame, 23…
… Plate, 25,26 …… Cooling tank, 31,41 …… Glass, 40 ……
Camera frame, 42 …… Lens system.

Claims (1)

[Scope of utility model registration request] 1. A body having a substantially spherical outer shape, a mask surface attached to one side in one axial extension direction, and a camera cable attached to the other side, and disposed inside the body at a substantially central position of the spherical shape. And a solid-state image sensor camera device with an optical system directed in the direction of the mask, and a solid-state image sensor camera device, which is arranged at intervals around the solid-state image sensor camera device to illuminate a direction in which the solid-state image sensor camera device captures an image. An illumination device; and a cooling tank device for absorbing heat from the illumination, which is arranged so that a tank portion is located between the illumination device and the outer periphery of the illumination device and between the illumination device and the solid-state imaging device camera device. A camera device for in-pipe inspection.