KR101539723B1 - Small diameter pipe internal investigation unit - Google Patents

Small diameter pipe internal investigation unit Download PDF

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Publication number
KR101539723B1
KR101539723B1 KR1020140024880A KR20140024880A KR101539723B1 KR 101539723 B1 KR101539723 B1 KR 101539723B1 KR 1020140024880 A KR1020140024880 A KR 1020140024880A KR 20140024880 A KR20140024880 A KR 20140024880A KR 101539723 B1 KR101539723 B1 KR 101539723B1
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KR
South Korea
Prior art keywords
tension spring
camera
push rod
rod
camera housing
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KR1020140024880A
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Korean (ko)
Inventor
임진영
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임진영
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Priority to KR1020140024880A priority Critical patent/KR101539723B1/en
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Publication of KR101539723B1 publication Critical patent/KR101539723B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/28Constructional aspects
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/88Investigating the presence of flaws or contamination
    • G01N21/95Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/954Inspecting the inner surface of hollow bodies, e.g. bores
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L2101/00Uses or applications of pigs or moles
    • F16L2101/30Inspecting, measuring or testing

Abstract

The present invention relates to an apparatus for examining the inside of a small-diameter pipe, and aims to make a structure of a pushrod used for moving a camera for examining the inside of a pipe along the pipe as a spring rod structure in the shape of a tension spring with a cable inserted and to make it possible to display an excellent input performance in a bent pipe with a small diameter, a U-trap, or the like. The apparatus for examining the inside of a small-diameter pipe of the present invention comprises: a camera for shooting the inside of a pipe; a camera housing wherein the camera is installed to be able to rotate to the left and the right; a skid installed on the outer circumference of the camera housing for placing the camera near the center of the pipe; a rod for entry for making the camera housing enter the pipe; a rod connector for connecting the rear end of the camera housing and the front end of the rod for entry; and a pushrod for supplying electric power and a signal to the camera through the inside of the rod for entry. The pushrod is combined and fixated to the rear end of the rod for entry through the pushrod connector with the tension spring installed on the outer circumference of the cable for supplying electric power and a signal to the camera by penetrating the rod for entry.

Description

{Small diameter pipe internal investigation unit}

More particularly, the present invention relates to a structure of a push rod used for moving a camera for irradiating an inside of a canopy tube along a duct, The present invention relates to a sub-tube tunnel internal-irradiation apparatus for exerting an excellent insertion performance in a bending tube or U-trap of a small tube tube.

Generally, underground buried pipes exist in a wide variety of sizes ranging from large-sized sewer pipes of several meters in diameter to gas pipes of several millimeters in diameter. In the case of the communication pipe, a plastic pipe having a diameter of 100 mm is mostly used.

Therefore, since the communication pipe is made of plastic, the durability is relatively weak, its life is short, and it is affected by the surrounding environment. Therefore, the guarantee period for the service life is irregular. As a result, the communication line is often defective even though it has not been used for several years. Therefore, it should always be checked whether it is normal before use.

As a device for irradiating the inside of the pipe as described above, a push rod camera charging device is utilized. At this time, the configuration of the push-type camera input device includes a camera housing in which the camera is installed, a camera installed in the camera housing, a skid for positioning the camera close to the center of the pipe, an entry rod for entering the camera housing into the pipe, A push rod connected to the camera through the push rod, a rod connector connecting the camera housing and the entry rod, and a push rod winding drum for winding and arranging the push rod.

On the other hand, the push rod used in the push rod camera inserting apparatus according to the related art is configured as a semi-rigid semi-rigid type. In the construction of such a push rod camera input device, the push rod is made of a structure in which a cable made by combining copper wire and glass fiber with resin and epoxy is covered with a PVC sheath.

The push rod camera constituting the push rod camera inserting device according to the related art as described above is installed inside the camera head so as to be rotatable from side to side. At this time, a power line and a signal line from the push rod are connected to the camera inside the camera housing to supply power and signals to the camera and lighting installed in the camera. Accordingly, a space in which the power line and the signal line can be installed in the camera housing, and a space for preventing the power line and the signal line from interfering with the camera during the rotation of the camera are required.

However, the camera head constituting the push rod camera inserting device according to the related art requires a space in which a power line and a signal line can be installed, and a free space for preventing a power line and a signal line from interfering with the camera when the camera is rotated There is a problem that the size of the camera housing is inevitably increased in order to form a clear space. The reason for this is that the size of the camera housing is too large to be applied to the pipe of the small pipe.

In addition, although the push rod constituting the push rod camera insertion device according to the related art as described above has a rigidity but lacks flexibility, it exhibits good injection performance at the straight pipe, but it is difficult to push the push rod at the bending pipe of the small pipe, The problem is that the load is broken frequently.

In the push rod according to the related art as described above, since the copper wire formed by the single wire is located at about 3 to 6 strands on the circular outer periphery of the push rod section, the copper wire is repeatedly stretched due to the bending of the push rod, There are frequent problems.

In addition, in the push rod according to the related art as described above, since the signal line is not shielded by the shield, noise is likely to be generated in the signal.

1. Korea public utility model room 1996-034722 (November 21, 1996) 2. Korean Patent Publication No. 2005-0080892 (published on August 18, 2005) 3. Korean Utility Model Registration No. 20-0183157 (issued on May 15, 2000) 4. Korean Registered Patent No. 10-1298227 (Published in the Official Gazette of August 22, 2013)

SUMMARY OF THE INVENTION The present invention has been made in order to solve all the problems of the prior art, and it is an object of the present invention to provide a structure of a push rod used to move a camera along a duct, The present invention has been made in view of the above problems, and it is an object of the present invention to provide an internal irradiation apparatus for a tube tube light pipe which is capable of exhibiting excellent injection performance in a bending tube or U-trap of a tube tube.

It is another object of the present invention to provide a push rod structure in which a cable is formed in a spring-loaded structure in the form of a tension spring inserted into a cable so that the cable can be flexed easily in a bend under the protection of a tension spring, And it is an object of the present invention to prevent occurrence of stretching or breakage in spite of warpage.

In addition, according to the present invention, the structure of the push rod is constituted by a spring rod structure in which a cable penetrates the inside of a tension spring. By using a shielded cable, generation of noise on a signal can be suppressed, The present invention has been made in view of the above problems.

Further, according to the technology of the present invention, the structure of the push rod is constituted by a spring rod structure in which the cable passes through the inside of the tension spring, and the noise generated by the signal can be suppressed by using the shielded cable, So that the inspection inside the pipe can be more clearly made.

Also, according to the present invention, since the contact terminals of the conductive coating are formed on both sides of the inside of the camera housing through the conductive paint to supply electric power to the LED lighting, the size of the camera due to the thin thickness of the conductive paint film is designed The purpose is to make it possible.

In addition, the technology of the present invention can reduce the size of the camera due to the thin thickness of the conductive film, thereby reducing the size of the camera housing, thereby making it possible to favor the design of a skid suitable for a pipe of a small diameter tube .

The present invention configured to achieve the above-described object is as follows. That is, the apparatus for illuminating a small-sized tube light pipe according to the present invention includes a camera for photographing the inside of the channel, a camera housing having the camera rotatably installed in the left and right direction, A push rod for supplying power and signals to the camera through the inside of the entry rod, and a push rod for supplying power and signals to the camera through the inside of the entry rod Wherein the push rod is provided with a tension spring on an outer periphery of a cable which penetrates the rod connector and the entrance rod to supply power and signals to the camera, and a push rod connector is provided at the rear end of the entrance rod And is fixedly coupled to the main body through the first through- The length of the base cable is made longer than the length of the tension spring, so that an extra cable is projected into and retracted from the end of the tension spring into the tension spring. Thus, even if the tension spring is pulled by the pulling force of the push rod, Wherein the conductive film is formed on both sides of the inner surface of the camera housing through a conductive paint and at the front end and the rear end of each of the conductive film terminals, And power supply means including a connection end at which a power line and a connection are made.

In the configuration according to the present invention as described above, the tension spring may be formed of a tension coil spring formed in a cylindrical coil shape. At this time, the helical windings adjacent to the front and rear of the tension spring are closely contacted to each other.

In addition, in the structure according to the present invention as described above, the material of the tension spring may be made of stainless steel.

In the structure according to the present invention, the cable constituting the push rod may be constructed so as to be freely movable in the tension spring separated from the tension spring.

delete

In addition, in the structure according to the present invention, a helical spring coupling groove corresponding to the winding of the tension spring is formed inside the push rod connector. When the tension spring is engaged and fixed on the spring coupling groove, A resin may be applied and the tension spring may be adhered and fixed to the spring coupling groove through curing.

delete

According to the technique of the present invention, the spring-loaded structure of the tension spring type, in which the cable is inserted into the structure of the push rod used to move the camera along the pipeline for irradiating the inside of the pipeline, There is an advantage that the injection performance is demonstrated.

In addition, the technique according to the present invention allows the cable to be easily bent in the bend under the protection of the tension spring, so that the effect that the cable does not stretch or break, despite repeated bending, is developed.

In addition, according to the present invention, by using a shielded cable, it is possible to suppress noise generation to a signal to realize a clear image, and to realize such a clear image, So that it can be performed.

In addition, according to the present invention, since the contact terminals of the conductive coating are formed on both sides of the inside of the camera housing through the conductive paint to supply power to the LED lighting, the size of the camera due to the thin thickness of the conductive paint film is designed There is a number.

In addition, the technology of the present invention can reduce the size of the camera due to the thin thickness of the conductive film, thereby reducing the size of the camera housing, which is advantageous in designing a skid suitable for a pipe of a small diameter tube.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a structure of an internal irradiation device for a tube-guided duct according to the present invention. FIG.
FIG. 2 is a perspective view showing a combined structure of an internal irradiation apparatus of a tube-type tube according to the present invention. FIG.
Fig. 3 is a perspective view showing a push-rod winding frame constituting an internal irradiation apparatus for a small-diameter tube tube in the technique according to the present invention; Fig.
FIG. 4 is a perspective view showing an internal irradiation apparatus for a tube-light tube according to the present invention. FIG.
FIG. 5 is a cross-sectional view showing an internal irradiation apparatus for a tube-light tube in the technique according to the present invention. FIG.
6 is an enlarged view of the portion "A" of Fig. 5; Fig.
7 is an enlarged view of the portion "B" in Fig. 5;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an internal irradiation apparatus for a canopy tube according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a perspective view of a tilting tube internal irradiation apparatus according to the present invention, Fig. 2 is a perspective view showing a tilting tube internal irradiation apparatus of the technique according to the present invention, Fig. FIG. 4 is a perspective view showing a push-rod winding frame constituting an internal irradiation apparatus for a light pipe of a technique according to the invention. FIG. FIG. 6 is an enlarged view of the portion "A" of FIG. 5, and FIG. 7 is an enlarged view of the portion "B" of FIG. 5 .

As shown in FIGS. 1 to 7, the apparatus 100 for illuminating a canopy tube according to the present invention includes a camera 110 and a camera 110 for photographing the inside of the canal, A skid 130 installed on the outer periphery of the camera housing 120 to allow the camera to be positioned close to the center of the duct, an entrance rod for entering the camera housing 120 into the duct, 140 and a power supply and a signal are supplied to the camera 110 and the LED lighting 112 through the rod connector 150 connecting the rear end of the camera housing 120 and the front end of the entrance rod 140 and the inside of the entrance rod 140 And a push rod 160.

The technology of the present invention supplies power and signals to the LED lighting 112 installed on the front surface of the camera 110 and the camera housing 120 including the camera 110 and the skid 130, The push rod 160 is configured to pass the entrance rod 140 to supply power and signals to the camera 110 and the LED illumination 112 of the camera housing 120 And a tension spring 164 which is provided on the outer circumference of the cable 162 and is coupled and fixed through a rear end of the push rod connector 170 coupled to the rear end of the entry rod 140. [ Which is different from the push rod according to FIG.

In other words, the push rod 160 according to the present invention configured as described above supplies power and signals to the camera 110 and the LED lighting 112 in the camera housing 120 through the entry rod 140 A tension spring 164 is provided on the outer circumference of a cable 162 that is connected to a rear end of a push rod connector 170 that is coupled to a rear end of the entry rod 140, can do. At this time, it can be seen that the push rod connector 170 connects the push rod 160 with the entry rod 140.

As described above, the push rod 160, which is composed of the cable 162 that supplies power and signals to the camera 110 and the LED lighting 112, and the tension spring 164 that is installed on the outer circumference of the cable 162, And tension spring 164 is biased against bending. At this time, the inner cable 162 is separated from the tension spring 164 and moves freely within the tension spring 164.

Meanwhile, the push rod 160 according to the present invention has a push rod 160 to prevent the push rod 160 from being easily bent in the tubular bend as described above, so that it is not stretched or broken even in repeated bending of the cable 162 160 are separated from the tension spring 164 and can freely move within the tension spring 164. That is, the inner diameter of the tension spring 164 is configured to be larger than the outer diameter of the cable 162 so that the cable 162 can freely move within the tension spring 164.

The push rod 160 according to the present invention may be designed such that the length of the cable 162 constituting the push rod 160 is adjusted by a tensile spring (not shown) to prevent the elongation and breakage of the cable 162 from occurring, 164 and is projected and retracted into the tension spring 164 which is stretched or contracted by the pulling force of the extra cable 162 at the end of the tension spring 164.

Therefore, the cable 162 can be freely moved within the tension spring 164 by making the inner diameter of the tension spring 164 larger than the outer diameter of the cable 162, The length of the tension spring 164 is longer than the length of the tension spring 164 so that the excess cable 162 at the end of the tension spring 164 projects and retracts into the tension spring 164 that is stretched or contracted by the pulling force, Even if the tension spring 164 is pulled by the pulling force of the push rod 160, the influence of the tension on the cable 162 is not exerted.

In other words, as described above, the cable 162 is constructed so as to be freely movable within the tension spring 164, but the length of the cable 162 is longer than the length of the tension spring 164, The cable 162 is configured to be retracted by the tension spring 164 even though the tension spring 164 is pulled by the pulling force of the push rod 160. [ 164), so that it is not stretched or broken even in repeated warping.

Since the push rod 160 according to the present invention constructed as described above enters and exits the tension spring 164 which is stretched by the pulling force of the extra cable 162 at the end of the tension spring 164, So that the cable 162 can be protected. That is, in the structure of the push rod 160 according to the present invention, the tension spring 164 is a structure for protecting the cable 162 as well as allowing the bending of the inside of the pipe to be easily entered.

Meanwhile, the push rod 160 as described above is not broken or easily broken because the tensile spring 164 made of stainless steel has sufficient rigidity, and even when the cable 162 inside the push rod 160 is damaged, It is possible to repair easily by simply exchanging the inexpensive cable 162.

In addition, the push rod 160 having the structure of the cable 162 and the tension spring 164 according to the present invention as described above has superior performance as compared with the push rod according to the related art. The tension spring 164 of the push rod 160 is a tension coil spring formed in the form of a cylindrical coil. Each spiral winding adjacent to the front and rear of the tension spring 164 is in close contact with the surface of the tension spring 164.

The pushing spring 164 of the push rod 160 as described above is characterized in that the pushing force is transmitted as it is in the longitudinal direction as it is due to its characteristics and it tends to spread against bending. However, compared with the conventional semi-rigid push rod, The bending radius and the resilience are much better than those of the conventional push rod. Therefore, the push rod 160 according to the present invention has a very excellent injection performance in a bending tube of a small diameter tube or a U-trap.

Meanwhile, as a result of the test by the internal irradiation apparatus 100 for a small-sized tube-tube bundle according to the present invention, to which the push rod 160 having the configuration of the cable 162 and the tension spring 164 was applied, We could see that we passed the continuous 90 ° bend more than 5 times. Accordingly, it can be understood that the pushing performance of the push rod 160 according to the present invention is superior to that of the prior art products which can not pass through the first through second consecutive times.

In addition, the tension spring 164 of the push rod 160 constituting the sub-tube tube internal irradiation apparatus 100 according to the present invention has a small radius of curvature, and the push rod winding frame for winding and arranging the push rod 160 The push rod winding drum 182 of the push rod winding frame 180 can be designed to be small so that the push rod winding frame 180 can be miniaturized in size.

Since the cable 162 of the push rod 160 constituting the inside tube lighting apparatus 100 according to the present invention as described above is structured such that the outside is shielded by the tension spring 164, It is possible to suppress the generation of noise to the image of a clear image. As described above, the push rod 160 according to the present invention suppresses the generation of noise and implements a clear image, thereby making it possible to more clearly illuminate the inside of the channel.

Next, a configuration according to the present invention may further include a power supply means 190 for supplying power to the LED lighting 112. [ The power supply means 190 is formed on both sides of the inner surface of the camera housing 120 at the front and rear ends of the conductive film terminals 192 and the conductive film terminals 192 via conductive paint, And a connection terminal 194 to which the power line constituting the cable 162 is electrically connected.

As shown in FIGS. 1, 2, and 4 to 6, the head portion of the camera 110 and the camera housing 120 are detachably coupled to the leading end of the entrance rod 140. At this time, the inside of the camera housing 120 is completely waterproofed by a seal 122 as shown in FIG. 4 to FIG. Therefore, the technique according to the present invention can use a fixed camera, a horizontal holding camera, or a Pan-Tilt camera.

In general, in the design structure of a self-leveling camera, the products according to the prior art are provided with a mechanical part of the camera in order to prevent the two- And a passage through which a separate line passes is secured. This has the disadvantage that the diameter and length of the camera are made large.

On the other hand, according to the present invention, as described above, the conductive paint is applied to the inner circumferential surface of the camera housing 120 in the longitudinal direction of the camera housing 120 to supply electric power to the LED lighting 112 through the thin coating film By forming the means 190, it is not necessary to divide the mechanical part of the camera into an inner passage outer tube or to design a passage through which a separate line passes, as in the prior art.

As described above, the technique according to the present invention includes electric power supply means 190 for applying electric conductive paint on the inner circumferential surface of the camera housing 120 longitudinally in the front and rear direction to supply electricity to the LED lighting 112 through a thin paint film The size of the camera 110 can be reduced by 5 mm or more and the length of the camera 110 can be reduced due to the thin thickness of the coating film (Camera module: 1/3 inch CCD, 50 Pixel basis).

As described above, according to the present invention, when the size of the camera 110 is reduced, it is more advantageous than that of the conventional apparatus when it is inserted into a pipe having a small diameter of 50 mm or less, There is an advantage that the design of the skid 130 for positioning the camera 110 in the center of the duct is advantageous.

The skid 130 may have an inner diameter corresponding to the outer diameter of the camera housing 120. The outer circumference of the skid 130 may have a sine wave shape, So that the camera 110 installed near the center of the channel is positioned close to the center of the channel. At this time, a tongue bolt 134 is screwed into each of the recesses of the skid 130 so that the skid 130 can be fixed to the outer diameter of the camera housing 120.

The entrance rod 140 constituting the small-diameter-channel internal-irradiation apparatus 100 according to the present invention includes a camera 110, a camera housing 120, and a skid 1300, As shown in FIGS. 4 and 5, the entry rod 140 is formed in a spring shape having a structure in which the distance between the front and rear of the helical winding gradually increases from the front and rear to the center.

As described above, the joining rod 140 is formed to have a structure in which the distance between the front and rear ends of the helical winding is gradually widened from the front and rear to the central portion. In this case, the head portion composed of the camera 110, the camera housing 120, So that the introduction of the head can be smoothly performed in the curved portion by the bending of the entrance rod 140 at the time of insertion.

In the structure according to the present invention, a spiral spring coupling groove (corresponding to the winding of the tension spring 164) is formed inside the push rod connector 170 connecting the rear end of the entry rod 140 and the tip of the push rod 160 Resin 174 is applied between the outer circumferential surface of the distal end of the tension spring 164 and the spring engagement groove 172 when the tension spring 164 is engaged and fixed on the spring engagement groove 172, So that the tension spring 164 can be fixedly adhered to the spring engagement groove 172. [

Further, the tongue bolts 176 are screwed at regular intervals in the circumferential direction of the outer circumferential surface of the push rod connector 170 configured as described above, so that the tension spring 164 is firmly fixed inside the push rod connector 170 .

4 and 5, the front end of the push rod connector 170 is coupled to the inner diameter of the rear end of the entry rod 140. [ At this time, the front end of the push rod connector 170 is also configured so that the inner diameter of the rear end of the entry rod 140 is coupled through a spiral groove and the resin is hardened by coating.

As described above, according to the present invention, since the structure of the push rod 160 is structured by the structure of the tension spring 164 inserted through the cable 162, excellent insertion performance can be obtained in a bending tube or U- The cable 162 can be easily bent in the curved tube under the protection of the tension spring 164, so that the cable 162 can be prevented from being stretched or broken even in repeated bending.

In addition, according to the present invention, the cable 162 is shielded through the tension spring 164 to suppress the generation of noise on the signal, thereby realizing an image of a clear image quality so that the inside of the channel can be more clearly illuminated There are advantages.

In addition, according to the present invention, the contact terminals 192 of the conductive coating are formed on both sides of the inside of the camera housing 120 through the conductive paint to supply electric power to the LED lighting 112, so that a thin thickness of the conductive paint film It is possible to reduce the size of the camera housing 120 by reducing the size of the camera 110 and to design the skid 130 suitable for the pipe of the small diameter tube.

The present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the technical idea of the present invention.

100. Channel Investigation Device 110. Camera
112. LED lighting 120. Camera housing
122. Seal 130. Skid
132. Coupling ball 134. Tuning bolt
140. Entry rod 150. Rod connector
160. Push rod 162. Cable
164. Tension spring 170. Push rod connector
172. Spring coupling groove 174. Resin
180. Push rod winding frame 182. Push rod winding drum
190. Electric power supply means 192. Conductive film terminal
194. Connection

Claims (8)

  1. A camera housing mounted on the outer periphery of the camera housing to allow the camera to be positioned close to the center of the duct, a camera housing housing the camera housing, And a push rod for supplying power and a signal to the camera through the inside of the entrance rod, the internal illumination device comprising: a light source for illuminating the entrance of the camera housing; a rod connector for connecting the rear end of the camera housing and the entrance rod;
    Wherein the push rod is configured such that a tension spring is provided on an outer circumference of a cable that penetrates the rod connector and the input rod and supplies power and signals to the camera and is coupled and fixed to a rear end of the input rod via a push rod connector, The length of the tension spring is longer than the length of the tension spring so that an extra cable is projected and retracted into the tension spring at the end of the tension spring so that even if the tension spring is pulled by the pulling force of the push rod, And a projecting / retracting operation is performed at an end of the tension spring,
    And power supply means formed on both sides of the inner surface of the camera housing via conductive coatings and conductive terminals formed at the front end and the rear end of each of the conductive film terminals and connected to the power line of the push rod, Internal irradiation device for internal tunnel.
  2. The apparatus as set forth in claim 1, wherein the tension spring is a tension coil spring formed in a cylindrical coil shape.
  3. 3. The apparatus according to claim 2, wherein the spiral windings adjacent to the front and rear of the tension spring are in close contact with each other.
  4. The apparatus as set forth in claim 3, wherein the tension spring is made of stainless steel.
  5. The internal combustion engine according to any one of claims 1 to 4, wherein the cable constituting the push rod is configured to be freely movable in a tension spring separated from the tension spring Device.
  6. delete
  7. [7] The push rod connector of claim 5, wherein a spiral spring groove corresponding to the winding of the tension spring is formed on the inside of the push rod connector, and when the tension spring is engaged with the spring engagement groove, Wherein resin is applied and adhered and fixed through curing.
  8. delete
KR1020140024880A 2014-03-03 2014-03-03 Small diameter pipe internal investigation unit KR101539723B1 (en)

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Application Number Priority Date Filing Date Title
KR1020140024880A KR101539723B1 (en) 2014-03-03 2014-03-03 Small diameter pipe internal investigation unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101967098B1 (en) * 2018-06-05 2019-04-08 최재현 Non-digging Sewerage Mending Apparatus and its manufacturing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010092478A2 (en) * 2009-02-13 2010-08-19 Seek Tech, Inc. Push-cable for pipe inspection system
KR101057813B1 (en) * 2011-02-24 2011-08-19 주식회사 두배시스템 Endoscope to take image in inside of gas pipe
KR101156421B1 (en) * 2011-11-29 2012-06-21 김태혁 Borescope
KR101154034B1 (en) * 2009-02-10 2012-07-03 주식회사 두배시스템 Pipeline inspection apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101154034B1 (en) * 2009-02-10 2012-07-03 주식회사 두배시스템 Pipeline inspection apparatus
WO2010092478A2 (en) * 2009-02-13 2010-08-19 Seek Tech, Inc. Push-cable for pipe inspection system
KR101057813B1 (en) * 2011-02-24 2011-08-19 주식회사 두배시스템 Endoscope to take image in inside of gas pipe
KR101156421B1 (en) * 2011-11-29 2012-06-21 김태혁 Borescope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101967098B1 (en) * 2018-06-05 2019-04-08 최재현 Non-digging Sewerage Mending Apparatus and its manufacturing method

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