KR200280446Y1 - Pipe closure apparatus for leak testing of pipe - Google Patents

Abstract

The present invention relates to a sealing device for watertight inspection of the pipe, the opening portion of the steel pipe is blocked by the disc, the frame portion for blocking or bypassing the flow (flow water) through the opening formed in the center of the disc; Watertight inspection unit for measuring the change in water pressure by injecting high-pressure water into the inspection space through the water inlet formed in the central portion of the longitudinal direction of the steel pipe; And a sealing part for sealing the sewage pipe by inflation of the tube by injecting air through an air inlet to the flexible tube wrapped to form the inspection space on both outer circumferential surfaces of the steel pipe with respect to the water inlet. Expansion of the tube formed on the outer circumferential surface of the steel pipe to form a sealing device, and in particular to detect leaks caused by breakage of sewer pipes buried underground or aging of seams such as concrete pipes, fume pipes, VR pipes, PE pipes, etc. After sealing the tube by injecting high pressure water into the inspection space formed by the expansion of the tube, the water pressure of the pipe is inspected by measuring the change in the water pressure, and the watertight tube which bypasses or blocks the water in the pipe during the watertight inspection or maintenance work. It relates to a sealing device for inspection.

Description

PIPE CLOSURE APPARATUS FOR LEAK TESTING OF PIPE

The present invention relates to a sealing device for watertight inspection of pipes, in particular, in order to detect leaks caused by breakage of sewer pipes buried underground or aging of seams such as concrete pipes, fume pipes, VR pipes, PE pipes, etc. After sealing the tube formed on the outer circumferential surface of the tube and injecting high pressure water into the inspection space formed by the tube expansion, the water pressure of the tube is measured by measuring the change in water pressure, and the water flow in the tube is bypassed during the watertight inspection or maintenance work. The present invention relates to a sealing device for inspecting watertight pipes for blocking or blocking.

Conventional techniques related to the airtight sealer for enclosing the sewer pipe by expanding the tube for the purpose of watertight inspection and repair of the tube as follows.

The leak seal for the pipe leak published in the Republic of Korea Utility Model Registration No. 1989-2136 is shown in Figure 5, the seal 101 is a female screw 102b on one side of the waterway hole (102a) inside the metal drum (102) ) To be coupled to open and close by bolts (103), the hydraulic disk (102 ') and the disk (102 ") having a diameter larger than the outer diameter of the drum 102 are integrally formed at both ends, but the water hole (102a) On the disc 102 "on the same side as the female thread 102b to which the bolt 103 for fastening and closing is fastened, the connector 105 and the air pet coke 106, which are formed with the binding holes 105a of the string, are screwed in, The inner surface of the tub 104 formed with the annular circumference 104a parallel to each of the outer circumferential surface and the outer circumferential surface of the hydraulic disk 102 'and the disk 102 " is strongly joined by a bonding material.

The tube leak inspection sealer 101 forms a hydraulic pressure plate 102 'and a disc 102 " at both ends of the waterway hole 102a to form an outer peripheral surface of the hydraulic pressure plate 102' and the disc 102 ". Although the tube 104 is attached and the air is supplied through the air pet coke 106 formed on the disc 102 ″, the tube 104 is expanded to block the sewer pipe, but the hydraulic disc 102 ′ is blocked. And the tube 104 bonded to the outer circumferential surface of the disc 102 ″ by the bonding material is not bound by physical means from the outside, so when the tube 104 is expanded by supplying high-pressure air, There is a problem in that the bonding strength is weakened so that it cannot perform the function as a tube. In addition, the sealer 101 is to perform only a function to block the sewage pipe or bypass the running water (flow water) through the waterway hole to inspect the sealer of another structure as shown in Figure 7 for the pipe leak inspection After additionally installed at any point of the section to form a test space, the test water is injected through a closed device of the other structure to observe the pressure change of the test space to check for leaks, so a leak test with one device And sealing could not be performed together.

The tube leak inspection sealer 201 published in the Republic of Korea Utility Model Registration No. 1989-2137 is shown in Figure 6, the sealer 201 is formed in both sides of the female screw 204 in the circumferential direction and joined In the vertical direction of the surface 205, a packing 206 is formed between the semi-circular left and right frames 203 and 203 'having the equally spaced fastening holes 205a inserted therein to prevent fluid from passing through, and the bolt 207 and the nut ( 207a) is formed through the fastening hole 205a of the joining surface to form a circular drum 202. At this time, the rib 203a is moved to the left and right frames 203 and 203 'to reduce the weight of the drum and to withstand high water pressure. Protruding on both sides, the water pipe 208 at the lower end of the left frame 203, the exhaust pipe 209 is welded through the upper end of the right frame 203 ', respectively, and a donut type to the outer peripheral surface of the drum 202 The inner circumferential surface of the tubing 210 is inserted into contact with the protective plate 211 Since the fastening holes 211a and the female screws 204 of the left and right frames 203 and 203 'coincide with the bolts 207', the protective plate 211 acts as a partition wall, so that the pet coke of the tub 210 is formed. The tub 210 is expanded only in the circumferential direction by the air pressure injected into the cock 210a.

The tube leak inspection sealer 201 forms a drum 202 in a wheel-like form by opposing two thin semicircular frames 203 and 203 'to each other in order to reduce the volume occupied by the conventional sealer. Inserting a tub 210 on the outer peripheral surface of the drum 202 by injecting air closes the space between the outer peripheral surface of the drum 202 and the inner circumferential surface of the sewer pipe with the expanded tube 210 to flow However, in order to form the drum 202 of the sealer 201, the left and right semicircular frames 203 and 203 'are combined to form the drum 202, so that gaps are formed at both ends of the joint surface and the diameter portion of the joint surface. In addition, it is difficult to detect a defective part of the sewer pipe due to a pressure loss generated in the gap during the leakage inspection with respect to the inspection space, and the sealer 201 also flows alone as in the conventional sealer 101 shown in FIG. 7. Car And you can check for leakage of the sewage pipe because it is inconvenient to be used with tile sealed with a separate, distinct structures.

The present invention is devised to solve the above problems, the object of the present invention is to form a tube on the outer circumferential surface of the steel pipe to seal the sewage pipe by the expansion of the tube, but using a single sealing device to block the flow of water and To provide a device capable of performing the watertight inspection function at the same time, to form each tube so that the two tubes are expanded and spaced apart on the outer peripheral surface of the steel pipe, injecting high pressure water into the space generated by the expansion of the tube watertight The inspection space is provided to perform the inspection, and the inspection space for the watertight inspection is made small to provide an airtight inspection sealing device capable of observing changes in water pressure more precisely.

Figure 1a is a cross-sectional view of the sealing device for watertight inspection according to the present invention,

Figure 1b is a cross-sectional view of the operating state of the sealing device for watertight inspection according to the present invention,

Figure 2a is a cross-sectional view of the sealing device for watertight inspection according to another embodiment of the present invention,

Figure 2b is a cross-sectional view of the operating state of the sealing device for watertight inspection according to another embodiment of the present invention,

Figure 3 is a side view of a state in which the wheel attached to the sealing device for watertight inspection according to another embodiment of the present invention,

4 is a cross-sectional view of a state in which the sealing device for watertight inspection according to the present invention is moved to one side for repair of the sewer pipe,

5 is a longitudinal cross-sectional view of a conventional tube leak inspection seal;

Figure 6 is an exploded perspective view of another conventional tube leak inspection seal;

7 is a state diagram used in the installation of a seal to detect the leak of the conventional pipe.

* Description of the symbols for the main parts of the drawings *

1,1 ': Sealing device 2: Steel pipe

3,3 ': tube 5: sewer pipe

20: opening 21: disc

22: socket 23: plug

24: bypass pipe 25: on-off valve

26: bracket 27: wheels

30: expansion space 31: air inlet

32: air injection pipe 33: nylon cord

34: band 35: annular protrusion

40: inspection space 41: water inlet

42: water outlet 43: water injection pipe

44: water discharge pipe 45: pressure gauge

46: discharge valve 50: seam

In order to achieve the above object, the present invention is a sealing device for sealing the sewage pipe by the expansion of the tube formed on the outer peripheral surface of the steel pipe, one side of the opening of the steel pipe is blocked by a disc, the opening formed in the center of the disc Frame portion for blocking or bypassing the flow of water (through water) through; Watertight inspection unit for measuring the change in water pressure by injecting high-pressure water into the inspection space through the water inlet formed in the central portion of the longitudinal direction of the steel pipe; And a sealing part sealing the sewage pipe by inflation of the tube by injecting air through an air inlet into a flexible tube wrapped to form the inspection space on both outer peripheral surfaces of the steel pipe with respect to the water inlet. It is characterized by.

The opening formed in the frame portion is characterized in that the socket which can be connected to the bypass pipe is formed.

One end of the bypass pipe is characterized in that the on-off valve is formed for blocking or bypassing the running water.

The watertight inspection unit is formed in the longitudinal center portion of the steel pipe in the circumferential direction of the water inlet and the water outlet are respectively joined to each of the water injection pipe and the water discharge pipe extending inward, the pressure gauge and the discharge valve is formed in the discharge portion of the water discharge pipe Characterized in that made.

The airtight portion is formed so that the air inlets are spaced apart from each other around the water inlet and the water outlet formed in the steel pipe, respectively, and are connected in series with the air inlet pipe extending inwardly, and both the steel pipes are formed around the water inlet and the water outlet of the steel pipe. Elastic tubes are wrapped on the outer circumferential surface of the, characterized in that the band is coupled to both ends of the tube.

Between the tube and the band is characterized by combining the band by inserting a nylon cord paper wider than the width of the band.

Forming a plurality of annular projections on the outer surface of the tube is characterized in that it is in close contact with the inner surface of the sewage pipe step by step.

The front and rear lower portions of the frame portion are formed to be removable, characterized in that the watertight inspection is made while moving in the sewer pipe.

An embodiment according to the present invention will be described with reference to the accompanying drawings.

Fig. 1A is a cross-sectional view of a sealing device for pipe watertight inspection (hereinafter referred to as "sealing device") 1 according to the present invention, in order to perform watertight inspection and sealing work on the joint 50 portion of the sewer pipe 5. The state in which the closure device 1 is located in the tube is shown.

In the sealing device 1 for watertight inspection of the pipe according to the present invention, one side of an open portion of a steel pipe 2 is blocked by a disc 21, and the sewage pipe is formed at the center of the disc 21. 5) an opening 20 that can be opened and closed by a stopper 23 is formed to block or bypass the flowing water flowing therein, and expands the expansion force of the flexible tube 3 formed on the outer circumferential surface of the steel pipe 2. A frame part having a hole (water inlet 41, water outlet 42, and air inlet 31) through which the sewage pipe 5 is closed and the water or water is allowed to go in and out for the watertight inspection; The high pressure water for watertight inspection is injected into the inspection space 40 formed by the expansion of the tube 3 through the water inlet 41 formed in the longitudinal center portion of the steel pipe 2 to check the change in the water pressure to see whether there is a leak. Watertight inspection unit for inspecting; And an air inlet 31 in a flexible tube 3 wrapped around the outer circumferential surface of both steel pipes 2 around the water inlet 41 formed on the outer circumferential surface of the steel pipe 2 to close the sewer pipe 5. It is composed of a sealing part for injecting air through the tube 3 is in close contact with the inner peripheral surface of the sewage pipe (5).

In more detail, the frame part is a steel pipe (2) having excellent strength to withstand the expansion pressure applied to the outer circumferential surface is used, blocking one side of the steel pipe (2) by the disc 21, the central portion of the disc 21 Receptacle 23 is formed to be retracted inwardly so that the plug 23 or the bypass tube 24 may be coupled to the opening 20 formed in the socket 22. In addition, a water inlet 41 for supplying high pressure water to the inspection space 40 in the circumferential direction and a water outlet 42 for drainage after watertight inspection are formed at the central portion in the longitudinal direction of the steel pipe 2, respectively. Injecting air into the expansion space (30) formed by the outer peripheral surface of the tube (3) and the steel pipe (2) on both sides of the steel pipe (2) around the water inlet (41) and the water outlet (42) Air inlets 31 for each are formed.

The watertight inspection unit is connected to the water inlet 41 and the water outlet 42 formed in the central portion of the water pipe (43) and the water discharge pipe 44 extending into the steel pipe (2), respectively; The inlet portion of the water injection pipe 43 is provided with a nip horn so as to be connected to the discharge portion of the pressure pump, and the discharge portion of the water discharge pipe 44 can measure the water pressure in the inspection space 40 at the time of the hydraulic pressure test. A discharge valve 46 for controlling the supply of the pressure gauge 45 and the high pressure water or for discharging the water in the inspection space 40 is formed in this order.

The sealing part is formed by spaced in both sides around the water inlet 41 and the water outlet 42 formed in the central portion of the steel pipe 2 is the air injection pipe 32 extending into the steel pipe (2) Joined in series with the air inlet 31, the inlet portion of the air injection pipe 32 for injecting air into the expansion space 30 formed by the outer peripheral surface of the steel pipe (2) and the tube (3) The nipple is formed to be connected to the discharge part of the compressor, and it is also possible to further form a valve for intermittent injection of air. In addition, a tube 3 having excellent elasticity is wrapped on both sides of the outer circumferential surface of the steel pipe 2 around the water inlet 41 and the water outlet 42, and slightly at both ends of each of the tubes 3. After the nylon cord paper 33 having a wide width is wound on the outer circumferential surface, a band 34 is firmly coupled to the nylon cord paper 33 so that both ends of the tube 3 are surrounded by the band ( 34) to be in close contact with the outer peripheral surface of the steel pipe (2).

Figure 1b is a cross-sectional view of the operating state of the sealing device for watertight inspection (1) according to the present invention, as shown in Figure 1a to place the sealing device (1) in the joint portion 50 of the tube, for watertight inspection The state in which high pressure water is injected into the inspection space 40 formed by the expansion of the tube 3 is shown by injecting air into the tube 3 and blocking the flow of water.

In one embodiment of the present invention is a case of performing a water-tight test for the test space 40 in the state of blocking the flow of water by blocking the socket 22 formed on the disc 21 of the steel pipe 2 with a stopper 23 as an example. Holding it. Injecting air into each air inlet 31 through the air inlet pipe 32 into the expansion space 30 formed on the front and rear sides by the outer peripheral surface of the steel pipe (2) and the tube (3) (3) is expanded to form two seals, and a constant pressure is maintained in the expansion space (30) to withstand the water pressure in the sewage pipe (5) applied to the expanded tube (3), the tube ( The space between each tube 3 created by the spaced expansion of 3) is a closed space with both sides blocked. The space is used as the inspection space 40 for watertight inspection to be located in the damaged portion or the joint 50 portion of the sewage pipe (5). In order to inject the high-pressure water into the inspection space 40 to fill the water into the water inlet 41 formed on one side of the steel pipe (2) through the water injection pipe 43 extending into the inside of the steel pipe (2), The flow rate is controlled by a discharge valve 46 formed in the discharge portion of the water discharge pipe 44 until the water is completely filled in the inspection space 40, and when the water is filled in the inspection space 40, the discharge valve ( 46) and apply a constant water pressure to the inlet of the water injection pipe (43). The water pressure inside the inspection space 40 can be confirmed by the pressure gauge 45 formed in the discharge portion of the water discharge pipe 44, the pressure of the pressure at a time after a certain time has passed after applying the water pressure to the inspection space 40 Check for changes to determine if there is a leak. In order to perform watertight inspection on the joint 50 of the sewage pipe 5 and then to inspect the other points, the discharge valve 46 is opened to drain the water filled in the inspection space 40, and the air is injected. When the air injected into the expansion space (30) is removed by the pipe (32), the tube (3) is contracted and restored to an initial state, and the sealing device (pull the string connected to an arbitrary portion of the steel pipe (2) ( Move 1) to another point. On the other hand, when the tube 3 is inflated, both ends of the tube 3 are prevented from being torn by an edge formed at the inner side of the band 34, so as to be larger than the width of the band 34 as shown in the enlarged view. The wide and elastic nylon cord paper 33 is inserted in the middle so that the inner edge portion of the band 34 is not directly in contact with the tube 3, and the portion of the portion closely contacted by the band 34 is The tube 3 is stretched less than the center portion so that the adhesion force is concentrated at the center portion of the tube 3. In addition, in order to make the tube 3 adhere to a larger area on the inner surface of the sewage pipe 5 or to form a smaller inspection space 40 to perform a more precise watertight inspection, a large amount of air is applied to the tube 3. It may be formed by injecting the expansion space 30 to be larger.

Figure 2a is a cross-sectional view of the sealing device (1 ') for watertight inspection according to another embodiment of the present invention, by bypassing the running water while performing the watertight inspection and sealing work on the joint 50 of the sewage pipe (5) The state in which the closure device 1 'for giving is located in the tube is shown.

The sealing device 1 ′ according to another embodiment of the present invention has the same configuration as that of the sealing device 1 ′ shown in FIG. 1, and blocks the one side of the steel pipe 2. Bypass pipe 24 is coupled to bypass the flowing water to the socket 22 formed by the screw processing in the center, one end of the bypass pipe 24 to open and close for controlling the flow of the flowing water The valve 25 is formed. In addition, the sealing device (1 ') is formed with a plurality of annular projections 35 at equal intervals on the outer surface of the tube (3') wrapped on the outer circumferential surface of the steel pipe (2) to expand the tube (3 '). As shown in FIG. 2B, when the sewer pipe 5 is closely contacted with the inner circumferential surface of the sewer pipe 5, the sewer pipe 5 is sealed more securely. The wheels 27 are attached by forming a bracket 26 to attach the removable wheels 27 to the front and rear lower parts of the steel pipe 2 so as to easily move the wheels 27, and the wheels as shown in FIG. 3. Spread the wheels 27 on both sides and attach them to the bracket 26 so that the 27 may be vertically supported on the inner circumferential surface of the sewer pipe 5.

Figure 2b is a cross-sectional view of the operating state of the sealing device (1 ') for watertight inspection according to another embodiment of the present invention, bypassing the water flow to the bypass pipe 24 coupled to the socket 22 for watertight inspection The state in which high-pressure water is injected into the inspection space 40 formed by the expansion of the tube 3 'on which the annular protrusion 35 is formed is shown.

Blocking and watertight inspection of the sewage pipe 5 by the sealing device (1 ') is carried out in the same manner as the embodiment according to the embodiment of the present invention described above, is attached to the front and rear sides of the steel pipe (2) The wheels 27 supported on the inner circumferential surface of the sewage pipe 5 are lifted away from the inner circumferential surface of the sewage pipe 5 when the tube 3 'is expanded, and the movement of the sealer 1' When the tube 3 'is contracted, it is lowered and supported on the inner circumferential surface again. In addition, when performing the watertight inspection using the sealing device (1 '), if it is necessary to shut off the water without bypassing the bypass pipe 24 in accordance with the working environment to one end of the bypass pipe (24) Closing the opening and closing valve 25 formed to block the flow of water, which can obtain the same working environment as when the socket 22 formed in the closure device 1 according to an embodiment of the present invention is plugged with a stopper 23. .

3 is a side view of a state in which the wheel 27 is attached to the sealing device 1 'for watertight inspection according to another embodiment of the present invention, and a disc 21 for blocking one side of the opening of the steel pipe 2. Bypass pipe 24 is coupled to the inner side of the socket 22 formed in the center of the), the wheel 27 is attached to the bracket 26 formed in the front lower portion of the steel pipe (2) sewage pipe (5) The state which is supported by the lower inner peripheral surface of is shown.

4 is a cross-sectional view of a state in which the sealing device 1 for watertight inspection according to the present invention is moved to one side for repair of the sewer pipe 5, and after the watertight inspection for the sewer pipe 5 is completed, there is a defect. In order to replace or repair the sewage pipe 5, the sealing device 1 shown in FIG. 1B is moved to one side to show a state in which water flow is blocked. In addition, as shown in Figure 2b to lock the on-off valve 25 of the bypass pipe 24 coupled to the socket 22 of the sealing device (1 ') according to another embodiment of the present invention to block the water flow It is also possible to perform a function.

In performing the watertight inspection using the sealing device (1, 1 ') according to the present invention, not limited to the above-described method or configuration, it is also possible to achieve the object of the invention through various modified embodiments as follows. .

When performing the watertight inspection using the sealing device (1,1 ') according to the present invention when the damage of the sewage pipe 5 is wide or if you want to inspect the wide range of the tube (3,3) The expansion space (30) is formed to be spaced apart a lot between '), and the expansion of the tube (3, 3') to provide a large inspection space 40 may be carried out a watertight inspection for a wide range, In some cases, it is possible to provide a larger inspection space 40 by forming the frame portion long.

When the sewer pipe 5, which is the subject of the watertight inspection, is firmly processed such as a PVC pipe or a steel pipe, and the inner circumferential surface is smoothly processed, the watertight inspection using compressed air or other gas is performed without using a high pressure water. It is also possible to do this.

The frame part according to the present invention is formed by a steel pipe, so that corrosion caused by rust occurs when used in the sewage pipe 5 for a long time, but it is also possible to use the surface of the steel pipe by rust preventive treatment, but instead of the steel pipe, the frame is made of aluminum or stainless steel. It is also possible to form a part to manufacture a sealing device.

As described above, the present invention forms a test space by installing two sealing devices for watertight inspection to form two inspection apparatuses spaced apart from two tubes in one sealing apparatus. Provides a sealing device that can double the flow of water by expansion, injecting high pressure water into the test space generated by the expansion of the spaced tube to perform a watertight test function, the outer peripheral surface of the test space and the steel pipe The volume of the expansion space formed by the tube is formed to be small so that a small amount of air and high pressure water can be injected to perform the sealing and watertight inspection, and the precise pressure change can be detected by the small inspection space during the watertight inspection. In addition, since the expansion space is small, a small amount of air can be injected to quickly cut off the sewer pipe, and the pressure density inside the expansion space is increased to provide a large adhesion to the inner circumferential surface of the sewer pipe. In addition, by adding a detachable wheel to the frame portion of the closure device provided a convenience when moving the work zone.

Claims (8)

In the sealing device (1, 1 ') for sealing the sewer pipe (5) by the expansion of the tube (3, 3') formed on the outer peripheral surface of the steel pipe (2), One side of the open portion of the steel pipe (2) is blocked by the disc 21, the frame portion for blocking or bypassing the flow (flow water) through the opening 20 formed in the center of the disc 21; Watertight inspection unit for measuring the change in the water pressure by injecting high-pressure water into the test space 40 through the water inlet 41 formed in the longitudinal center portion of the steel pipe (2); And Air is injected through the air inlets 31 into the flexible tubes 3 and 3 ′ wrapped around the water inlets 41 so as to form the inspection space 40 on both outer peripheral surfaces of the steel pipe 2. A sealing part sealing the sewer pipe 5 by expansion of the tubes 3 and 3 '; Sealing device for watertight inspection of pipes, characterized in that consisting of. The method of claim 1, The opening portion 20 formed in the frame portion is a sealing device for watertight inspection, characterized in that the socket 22 is formed to be connected to the bypass tube (24). The method of claim 2, One end of the bypass pipe 24, the sealing device for watertight inspection, characterized in that the on-off valve 25 is formed to block or bypass the running water. The method of claim 1, The watertight inspection unit Water inlets 41 and water outlets 42 are formed in the longitudinal center portion of the steel pipe 2 in the circumferential direction, respectively, and are joined to the respective water injection pipes 43 and the water discharge pipes 44 extending therein. The pressure gauge 45 and the discharge valve 46 is formed in the discharge portion of the water discharge pipe 44, the sealing device for watertight inspection. The method of claim 1, The sealing part Water inlets 41 and water outlets 42 formed in the steel pipe (2) around the air inlet 31 on both sides are formed so as to be respectively spaced apart in series and joined in series with the air inlet pipe (32), Flexible tubes 3 and 3 'are respectively wrapped on the outer circumferential surfaces of both steel pipes 2 around the water inlet 41 and the water outlet 42 of the steel pipe 2, Sealing device for water-tight inspection, characterized in that the band 34 is coupled to both ends of the tube (3, 3 '). The method of claim 5, Sealing tube for watertight inspection, characterized in that between the tube (3, 3 ') and the band 34 by inserting a nylon cord paper 33 wider than the width of the band 34, the band 34 is combined. . The method of claim 5, A plurality of annular projections (35) formed on the outer surface of the tube (3) to ensure close contact with the inner surface of the sewage pipe (5) step by step watertight sealer. The method of claim 1, The front and rear lower portion of the frame portion to form a removable wheel (27) for watertight inspection, characterized in that the watertight inspection is made while moving in the sewage pipe (5).