KR100730653B1 - Vacuum testing apparatus of manhole for sewer's construction, complete inspection - Google Patents

Abstract

A vacuum testing apparatus of a manhole for sewers construction and a complete inspection is provided to immediately identify a water leakage point through soapy water test during the generation of pressure loss. A vacuum testing apparatus of a manhole for sewers construction and a complete inspection includes a body of a bladder(1), a supporting rod(18), a cylinder(16), a guide rod(17), an external air compressor(20), and a pressure meter(5). The bladder is formed in a shape of a plurality of panels. The supporting rod is connected through a bolt by being received at a fixing frame(21). The cylinder is provided on a top side of the supporting rod. The guide rod is mounted inside of the cylinder. The guide rod is fixed to a top center of a bladder body to operate the bladder up and down by the cylinder. The external air compressor is connected to a vacuum generator. The pressure meter is formed on a top of the bladder.

Description

Vacuum Testing Apparatus of Manhole for Sewer's Construction, Complete Inspection}

1 is a side cross-sectional view showing the structure of an overall inspection device according to the present invention.

Figure 2 is a side cross-sectional view showing another embodiment of the apparatus in the vacuum pressure test method.

Figure 3a is a perspective view showing the overall structure of the bladder inspection apparatus according to the present invention.

Figure 3b is a perspective view showing another embodiment of the bladder inspection apparatus according to the present invention.

Figure 4 is a perspective view showing the overall structure of the plate inspection apparatus according to the present invention.

5 is a block diagram showing the general flow of construction and completion inspection of the water and sewage pipe.

Figure 6 is a block diagram showing a manhole vacuum test step for construction and completion inspection according to the present invention.

※ Explanation of code about main part of drawing ※

1: bladder 2, 2 ': vacuum generator

3, 3 ': handle 4: pressing plate

5, 5 ': Pressure gauge 6, 6': Joint fastener

7: tight tube 8: vacuum pump

9: inside manhole 10: inside manhole

11: Plate 12: Extension Hose

13: built-in compressor 14: pressure regulating valve

15: intake and exhaust line 16: cylinder

17: guide rod 18: support

19: manhole injection portion 20: external compressor

21: fixed frame 22: plug

23: fixing pin 24: adjusting hole

The present invention relates to a vacuum test apparatus of the manhole carried out in the conduit inspection carried out in the construction and completion inspection corresponding to the finishing stage of the construction management procedure of the conduit construction, when looking at the flow of the conduit inspection, first of all the construction inspection and completion It is divided into inspections, and the completion inspection is made through visual and CCTV, including the flexible tube strain inspection, and it is generally inspected according to the construction inspection for complementary and reconstruction.

The construction inspection is divided into slope inspection and watertight inspection again, and the slope inspection checks whether the criteria are satisfied and reconstructs or leads to the comprehensive review stage. Watertight inspection is above 0.5m of groundwater level, presence of invasive water, Evaluate the possibility of leaching test and classify it into penetration test and leaching test if necessary.

The intrusion test is carried out a pumping test, which checks whether the standard is satisfied and leads to the completion of the comprehensive review step, and the leaching test checks whether the natural flow pipe is used to carry out a hydraulic pressure test or a leak test. Done.

In the leak test, it is considered whether the manhole is included in the inspection section. At this time, the watertight test and the air pressure test have been used for the leak test of the manhole used.

As such, the watertight inspection in Korea is required to conduct a watertight inspection by leak test before refilling the gravity type sewage pipe laid by the opening method according to the 'Guidelines for Acceptance of Design Construction of Sewage Pipes' by the Ministry of Environment Sewage 58450-583 (94.12.15). have.

However, the most widely used method of checking leakage of sewer pipes or manholes and determining whether the sewer pipes and manholes are installed correctly is the water leakage test, which is a means of movement of pressure change and prevention during the test process, Problems such as the treatment of the remaining water after the test is a cause to avoid the leak test.

In addition, the above-described method is a problem that frequently occurs in the use site at the work site requiring a quick detection of the leak point and a quick inspection time, a waste of complicated equipment and budget.

The present invention has been made to solve the above problems, it is an object to easily identify the leak point by the method of forming a vacuum inside the manhole and monitoring the loss value through a pressure gauge.

In addition, when the pressure loss occurs, it is possible to check the leakage point easily and immediately through the soap water test-by pouring the soap water on the wall, and then performing a vacuum test to identify the leak point through the location of the bubble-to make time and expense easy To save, the purpose is to.

Manhole vacuum pressure test apparatus for the construction and completion inspection of the sewage pipe according to the present invention for achieving the above object, the bladder (1) body in the form of a plurality of panels; A close contact tube 7 mounted between the upper and lower bladder bodies; A fixing frame 21 fixedly installed on the ground corresponding to both upper ends of the manhole injection portion 19; A support (18) seated on the fixing frame (21) and coupled to the fixing frame (21); A cylinder 16 provided above the support; A guide rod (17) mounted inside the cylinder (16) and fixed to the upper center of the bladder (1) body to operate the bladder (1) up and down by the cylinder; A built-in compressor (13) provided on the plane of the bladder (1) for injecting compressed air into the close contact tube (7); A control valve 14 for controlling the air supply to the close contact tube 7 through the compressor; An intake / exhaust line 15 through which compressed air flowing in and out through the control valve 14 moves; A joint fastener 6 which is laid on the plane of the bladder 1 and penetrates the bladder 1 and forms a passage connecting the outside and the inside of the manhole when the bladder 1 is mounted in the manhole; ; A vacuum generator (2) mounted to the joint fastener (6) to form a vacuum in the manhole in a few minutes; A vacuum pump (8) or an external (air) compressor (20) connected to the vacuum generator (2); As the inside of the manhole 9 is transferred to the vacuum state through the vacuum generator 2, a pressure gauge formed on the bladder 1 main body to measure the vacuum pressure of the inside of the manhole 9 and the sensor embedded therein. It is characterized by consisting of (5).

In addition, the vacuum pressure test apparatus of the manhole for the construction and completion inspection of the sewage pipe according to the present invention, instead of using the bladder (1) body, it is possible to use it by replacing the plate (11) body Is there.

The plate 11 main body has a similar shape and structure to the bladder 1 main body, but has a pressing plate 4 instead of the close contact tube 7 in the bladder 1. , Detailed specification of the plate 11 is as follows.

A plate 11 body; When the plate 11 is seated in the manhole injection portion 19, the pressing plate (4) which is mounted on the bottom surface of the body of the plate 11 so that the manhole and the plate 11 main body is in close contact with; A joint fastener 6 'which is laid on a plane of the plate 11 and penetrates the plate 11 and forms a passage connecting the outside and the inside of the manhole when the plate 11 is mounted in the manhole; A vacuum generator (2 ') mounted to the joint fastener (6') to form a vacuum in the manhole in a few minutes; A vacuum pump 8 or an external compressor 20 connected to the vacuum generator 2 '; As the inside of the manhole 9 is transferred to the vacuum state through the vacuum generator 2 ', a pressure gauge formed on the upper part of the body of the plate 11 to measure the vacuum pressure of the inside of the manhole 9 is installed inside the sensor. 5 '; When the plate 11 is mounted or demounted on the manhole injection portion 19, it is characterized by consisting of a handle 3 provided on both sides of the plate 11 in order to increase the efficiency of the work.

Hereinafter, with reference to the accompanying drawings will be described in more detail an application embodiment of the present invention.

Figure 1 is a side cross-sectional view showing the structure of the entire inspection device according to the present invention, the present invention after sealing all the pipes to be joined to the test manhole before and after backfilling to make the manhole in a vacuum state, the vacuum degree falling for a certain time This is to check the installation suitability of the target manhole and to check for leakage due to miscontact between the manhole and the pipe. The frame 21 is fixed by bolting or the like, and the support 18 is mounted on the fixed frame 21 and the cylinder 16 is fastened to the upper side of the support 18.

In the center of the fastened cylinder 16, the guide rod 17 is mounted through the cylinder 16, and the extended lower end of the guide rod 17 is attached to the center of the bladder 1. .

Operation of the vacuum pressure test device of the manhole for the construction and completion inspection of the sewer pipe according to the present invention is to set the manhole position to be measured by the lowering operation of the cylinder 16 by the power supply, the bladder 1 is located Thereafter, expansion of the close contact tube 7 by the compressor is performed, and the vacuum pressure from the plug 22 to the bladder 1 is closed by the bladder 1 positioned below the manhole to close the conduit provided on the bottom of the manhole. By forming a, it is characterized by measuring the time required for the change in vacuum pressure (10inchHg-> 9inchHg) to determine the abnormality in the manhole.

       The chart is a length conversion table.

The chart is a pressure conversion table.

Referring to Table 1 and Table 2, it is possible to convert the numerical value according to the unit of the measuring device or pressure gauge.

FIG. 2 is a side cross-sectional view showing another embodiment of the apparatus in the vacuum test method, which is considered to perform the inspection of the entire manhole more easily and quickly than when performing the measurement according to FIG. 1.

This is to replace the bladder 1 body, which is an inspection apparatus, and test the plate 11 main body by covering the upper part of the manhole injecting unit 19, and having a separate pressing plate 4 on the bottom of the plate 11. Thus, by tightly fixing the inner circumferential surface of the manhole injection portion 19 is a tight contact between the manhole and the plate 11 body.

After the close contact is made, the vacuum inside the manhole is changed through the vacuum generator, and the test process is the same. However, the plate 11 body is not lowered and fixed to the manhole during the inspection by the plate 11 body. As a result, a fast and comprehensive inspection of the entire manhole is performed.

For the vacuum pressure test of the manhole by the inspection apparatus such as the plate 11 main body or the bladder 1 main body, first, the airtight state of the sewer pipe inside the manhole must be maintained, It is preferable to consider a method of inserting and expanding the plug.

Figure 3a is a perspective view showing the overall structure of the bladder inspection apparatus according to the present invention, in the method of inspecting the vacuum pressure of the manhole, the inspection by the bladder (1) main body on the manhole frame or height adjustment concrete, the inside of the lower It is sealed and has very effective features for new and existing manholes.

This causes the bladder 1 to be lowered by the operation of the cylinder at the exact position of the manhole to be inspected, and then the compressed air generated through the built-in compressor 13 is sucked and exhausted along the pressure regulating valve 14. It enters the line 15 and this causes the tight tube 7 to expand.

It is sealed on the inner circumferential surface 10 of the manhole, the expanded close tube 7 is compressed between the manhole of the bladder (1) body, coupled with the joint fastener (6) formed on the upper portion of the bladder (1) body The inside of the manhole 9 is changed to a vacuum state by the vacuum generator 2.

In order to induce such a change in the vacuum state, the external compressor 20 or the vacuum pump 8 is connected to the vacuum generator 2 to suck the air therein.

Therefore, the bladder 1 main body is subjected to the vacuum pressure test on the inside of the manhole 9 by looking at the allowable time according to the difference in vacuum pressure through the pressure gauge with respect to the inside of the manhole 9 in which the degree of vacuum is formed.

1 and 2, a compressor 20 and a vacuum pump 8 are used, respectively, which are optionally available. The compressor 20 and the vacuum pump 8 shown in FIGS. 1 and 2 are interchanged. It is possible.

Figure 3b is a perspective view showing another embodiment of the bladder inspection apparatus according to the present invention, not the height adjustment of the guide bar 17 according to the operation of the cylinder 16 of the bladder 1 as in Figure 3a After manually lifting 3 ', the fixing pin 23 is fastened to one of the plurality of adjusting holes 24, so that the fixing pin 23 is fixed to the support 18 so that the height of the bladder 1 is increased. It shows a structure that can be adjusted.

Figure 4 is a perspective view showing the overall structure of the plate inspection apparatus according to the present invention, of the method of inspecting the vacuum pressure of the manhole, the inspection by the plate 11 main body to close the top, effective before refilling or when exposed will be.

The main body of such a plate 11 does not need to insert a separate inspection device inside the manhole or requires a cylinder, etc., and thus has excellent mobility and workability, and can perform a vacuum pressure inspection of the entire manhole in a short time. Is there.

That is, when the plate 11 main body is seated on the manhole injection portion 19, the pressing plate 4 formed on the bottom surface of the plate 11 is tightly inserted into the manhole injection portion 19 and the manhole injection portion 19 Adhesion to the inner circumferential surface is to seal the inside of the manhole (9).

When the inside of the manhole 9 is sealed as described above, the inside of the manhole 9 is changed to a vacuum state by the vacuum generator 2 'coupled with the joint fastener 6' positioned on the upper portion of the body of the plate 1. It is done.

Both the inspection by the bladder 1 main body and the inspection by the plate 11 main body are equipped with pressure gauges 5 and 5 ', respectively, for the internal vacuum pressure by the pressure gauges 5 and 5'. The condition is measured to check whether the manhole and conduit are in a joint state or whether a leak occurs.

FIG. 5 is a block diagram showing a general flow of construction and completion inspections for water and sewage pipes. Referring to the flow of conduit inspections through the drawings, firstly, construction and construction inspections are divided, and construction inspection includes flexible pipe strain inspection. This is done through the naked eye and CCTV, and is usually inspected according to the construction inspection at the time of supplementation and reconstruction.

The construction inspection is divided into slope inspection and watertight inspection again, and the slope inspection checks whether the criteria are satisfied and reconstructs or leads to the comprehensive review stage. Watertight inspection is above 0.5m of groundwater level, presence of invasive water, Evaluate the possibility of leaching test and classify it into penetration test and leaching test if necessary.

The intrusion test is carried out a pumping test, which again checks the satisfaction of the standard, and leads to the completion of the comprehensive review step, the leaching test is to check whether or not the natural drainage pipe to carry out a hydraulic pressure test or to confirm the need for leak test do.

It is preferable to use a cured rubber forming a corrugated surface in the crimping plate of the vacuum test apparatus of the manhole for construction and completion inspection of the sewage pipe according to the present invention, and the vacuum generator (2) (2 ') is an external compressor (20). ), It is possible to generate a vacuum without using a separate vacuum pump (8), it can be easily mounted on the joint fasteners (6) (6 '), in the embodiment a compressor of 100PSI at a minimum 7CFM In use, it takes about three minutes to build a 10 inchHg vacuum in a 15 foot deep manhole.

Figure 6 is a block diagram showing the vacuum pressure test step of the manhole for the construction and completion inspection of the sewage pipe according to the present invention, looking at the steps through the drawings as follows.

Opening and closing the manhole cover, and seating a test apparatus (bladder body or plate body) on the manhole, connecting a vacuum generator of the seated test apparatus and an external vacuum pump or air compressor, by a cylinder The test apparatus proceeds to the lower part of the manhole, the cylinder stops at the point requiring inspection, the compressed air flows into the close tube and the contact is made between the manhole and the test apparatus, and the test apparatus from the bottom of the manhole from the vacuum generator Changing the space between the vacuum state, and checking the allowable time according to the manhole standard through a pressure gauge provided in the test apparatus to check the change of vacuum pressure over time to check whether there is an abnormal manhole; If the pneumatic pressure falls below the prescribed value, stop working and apply soapy water to the inner circumferential surface of the manhole; That comprising the steps of: via the host detects a portion where the bubbles are generated in the soap solution, the recovery phase for the leaking point at which the bubbling is made in sequence characterized.

In addition, in the step of checking whether there is an abnormality of the vacuum pressure through a pressure gauge provided in the test apparatus to check the change in the vacuum pressure over time, the vacuum degree in the manhole by the vacuum pump and the vacuum generator is -25.4 cm ( The present invention is characterized by measuring the time during which the vacuum degree on the pressure gauge drops to -22.86 cm (9 inch) mercury after lowering to 10 inch) mercury.

In the above case, the allowable time varies according to the standard of the manhole, and the chart for evaluating this is as follows.

Depth (ft) is the depth of the manhole, and Diameter (in) is the diameter in the manhole, showing the allowable time (seconds) for the vacuum to fall from 10 inchHg-> 9 inchHg.

Manhole vacuum pressure test apparatus for the construction and completion inspection of the sewage pipe according to the present invention is easy to grasp the leak point by the method of forming a vacuum inside the manhole and monitoring the loss value through a pressure gauge and test the soapy water when the pressure loss occurs Through this, it is possible to identify leak points easily and immediately, and it is effective to provide the fastest, accurate and economical test method among manhole construction inspection methods after new or existing and repair work.

As described above, the present invention has been described in detail, but it is apparent to those skilled in the art that the present invention can be applied and applied to various industrial sites within the scope of the technical idea of the present invention. It will be obvious that the claims belong within the scope of the appended claims in the above-described equivalent range of structure and effect.

Claims (6)

delete delete An apparatus for determining suitability of installation of a manhole; A bladder (1) main body in the form of a plurality of panels; A close contact tube 7 mounted between the upper and lower bladder bodies; A fixing frame 21 fixedly installed on the ground corresponding to both upper ends of the manhole injection portion 19; A support (18) seated on the fixing frame (21) and engaged (by a bolt or the like); A cylinder 16 provided above the support; A guide rod (17) mounted inside the cylinder (16) and fixed to the upper center of the bladder (1) body to operate the bladder (1) up and down by the cylinder; A built-in compressor (13) provided on the plane of the bladder (1) for injecting compressed air into the close contact tube (7); A control valve 14 for controlling the air supply to the close contact tube 7 through the compressor; An intake / exhaust line 15 through which compressed air flowing in and out through the control valve 14 moves; A joint fastener 6 which is laid on the plane of the bladder 1 and penetrates the bladder 1 and forms a passage connecting the outside and the inside of the manhole when the bladder 1 is mounted in the manhole; ; A vacuum generator (2) mounted to the joint fastener (6) to form a vacuum in the manhole in minutes; A vacuum pump 8 or an external (air) compressor 20 connected to the vacuum generator 2; And As the inside of the manhole 9 is transferred to a vacuum state through the vacuum generator 2, a pressure gauge formed on the bladder 1 main body to measure the vacuum pressure of the inside of the manhole 9 and the sensor embedded therein. (5); vacuum pressure test device of the manhole for the construction and completion inspection of the sewer pipe, characterized in that consisting of. delete delete The method according to claim 3; The guide rod 17 removes the cylinder 16, in addition to the height adjustment method by the cylinder 16, drills a plurality of adjustment holes 24 in the guide rod 17, and then the adjustment hole 24. Optionally fastening the fixing pins 23 to the fixing pins 23 is caught by the support 18, the height of the manhole for testing the construction and completion of the sewer pipe, characterized in that the height is adjusted.

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