CN103954411A - Water pressure detecting device and method in drainage pipe - Google Patents

Abstract

A water pressure detecting device in a drainage pipe comprises a base, plugging plates at the two ends of the base and a plurality of connecting rods connected with the two plugging plates. The opposite inner sides of the two plugging plates are provided with sealing pads used for plugging a pipe opening of the drainage pipe to be detected. Two guide rails are arranged on the base in parallel, the bottom of one plugging plate of the two plugging plates is fixedly provided with a sliding block which slides on the guide rails to enable the plugging plate to be a movable plugging plate, and the other plugging plate is a fixed plugging plate fixed on the base. A supporting table used for supporting the drainage pipe to be detected is arranged between the fixed plugging plate and the movable plugging plate, and meanwhile the base is provided with a driving mechanism which can drive the movable plugging plate to move along the guide rails. The end of an exhaust pipe is communicated with a hollow buoyancy ball which can float on a water surface, and an exhaust hole communicated with the inside of the drainage pipe to be detected is formed in the top of the buoyancy ball. The invention further discloses a detecting method using the water pressure detecting device in the drainage pipe. The water pressure detecting device in the drainage pipe can be used for detecting drainage pipes of various specifications and is high in universality, the detecting method is convenient and easy to implement, and the detecting result is more accurate.

Description

Water pressure detection device and detection method in drainage pipe

technical field

The invention relates to the field of municipal engineering pipeline construction, in particular to a water pressure detection device and a detection method in a drainage pipe.

Background technique

Drainage pipes are mainly responsible for drainage tasks such as rainwater, sewage, and farmland drainage and irrigation. They are divided into concrete pipes and reinforced concrete pipes according to whether they are equipped with steel skeletons. External pressure load and internal water pressure testing are important indicators in the quality and performance testing of drainage pipes. When the internal water pressure of the drainage pipe is tested, it is allowed to have a wet sheet under the specified inspection internal water pressure, but the area of the wet sheet shall not exceed 5% of the total external area, and no water droplets shall flow. At present, the commonly used internal hydraulic testing machines are divided into two types: horizontal and vertical. The horizontal internal hydraulic testing machine includes blocking plates at both ends and tie rods connected between the blocking plates. Between the boards, the outer side of one of the blocking boards is provided with a water inlet pipe connected to the drain pipe to be tested. The water inlet pipe is provided with a pressure gauge for measuring the internal water pressure and a valve for controlling the water inlet pipe. An exhaust pipe is provided to discharge the gas in the pipe. At present, the concrete and reinforced concrete drainage pipes produced by manufacturers have many different models and specifications, and the existing horizontal internal hydraulic testing machine can generally only test several types or specifications of drainage pipes, which is not universal. Moreover, when the distance between the blocking plates needs to be adjusted during use, it is necessary to manually push the adjustment, which is laborious, and after adjustment, it is necessary to recheck whether the blocking plates at both ends of the testing machine are parallel and whether their center lines coincide, which is troublesome to operate.

For example, the Chinese invention patent "Non-metallic pipeline hydraulic leakage inspection device" with the application publication number CN102426084A discloses a device and its operation method. The device includes a rectangular frame body, a socket plug, a pipe hoop, a jack and The water injection pressure measurement system on the socket plug, in which the rectangular frame body is welded by channel steel to form a rectangle, the length of the rectangle is determined according to the length of a section of pipeline, and the width of the rectangle is determined according to the maximum diameter of the pipeline to be inspected, it can be seen The distance between the socket plugs in this device cannot be changed with the specific length of the drain pipe to be tested, and the height of the pipe hoop used to support the drain pipe is fixed and cannot be changed with the specific height of the drain pipe to be tested, so the device It can only be used to detect drainage pipes of certain specifications, and its versatility is poor.

Contents of the invention

The first technical problem to be solved by the present invention is to provide a water pressure detection device in a drainage pipe with good versatility, simple operation and convenience in view of the prior art.

The second technical problem to be solved by the present invention is to provide a detection method which can conveniently and simply detect the water pressure in the drainage pipe by using the above-mentioned device.

The technical solution adopted by the present invention to solve the first technical problem is: a water pressure detection device in a drainage pipe, including a base, blocking plates standing upright at both ends of the base, and a plurality of connecting rods connecting the two blocking plates. The board is pierced with a water inlet pipe that feeds water into the drain pipe to be tested and an exhaust pipe that discharges the gas in the drain pipe to be tested. The water inlet pipe is provided with a pressure gauge for testing the water pressure in the drain pipe to be tested and a pressure gauge for controlling The first control valve of the water inlet pipe is equipped with a second control valve in series on the exhaust pipe, and it is characterized in that: the relative inner side of the two blocking plates is provided with a sealing gasket for blocking the mouth of the drain pipe to be tested, Two guide rails are arranged in parallel on the base, and the bottom of one of the two blocking plates is fixed with a slider sliding on the guide rail so that the blocking plate becomes a mobile blocking plate, and the other blocking plate is fixed on the base. The blocking plate is fixed, and a support platform for supporting the drain pipe to be tested is set between the fixed blocking plate and the moving blocking plate, and a support platform is provided on the base that can drive the moving blocking plate to move along the guide rail. and the end of the exhaust pipe communicates with a hollow buoyancy ball that can float on the water surface, and the top of the buoyancy ball opens an exhaust hole that communicates with the drain pipe to be tested.

In order to enable the drain pipe to be tested to be firmly clamped between the above two blocking plates, and to prevent the displacement during the test from affecting the experimental results, the support platform is composed of at least one base and a support base superimposed on the base Composition, the support seat is provided with a V-shaped groove for the drainage pipe to be tested, and the height of the drainage pipe to be tested is conveniently adjusted by increasing or decreasing the base.

Further, the bottom of the base is installed with two U-shaped channel steels upside down on the corresponding guide rails, and at least two rollers rolling on the guide rails are arranged in each of the U-shaped channel steels, so that Make the support platform slide left and right on the guide rail according to the length of the drain pipe to be tested, so that the drain pipe to be tested is placed at the most stable position, so that the two blocking plates can be used to clamp drain pipes of various lengths and specifications.

Still further, the support platform is a lifting platform driven by the lifting mechanism and can move up and down, so that the support platform can be adjusted up and down according to the inner diameter of the drain pipe to be tested, so that the sealing pad can completely block the nozzles at both ends of the drain pipe to be tested , so that the device can be used to test drainage pipes of various inner diameter specifications.

The lifting mechanism can be implemented in various ways, such as a jack, or an air cylinder or a hydraulic cylinder. When the lifting mechanism is an air cylinder or a hydraulic cylinder, the lifting table is fixed on the piston rod of the air cylinder or hydraulic cylinder.

The above-mentioned drive mechanism can also have multiple ways of implementation. As a preference, the drive mechanism includes a motor, a screw rod supported on the base, and a nut threaded on the screw rod, and the nut is fixed on the moving The bottom of the blocking plate, the screw rod is linked with the output shaft of the motor.

In order to move and fix the movable blocking plate conveniently according to the length of the drain pipe to be measured, the two ends of the connecting rods are provided with external threads, and each connection is formed by connecting multi-section connecting rods sequentially through the head and tail threads of a screw sleeve. In this way, the supporting connecting rod can be disassembled or installed according to the needs, and the connecting rod matching the length of the drain pipe to be measured can be easily obtained, and when the connection is tightened, the fastening nut threaded at the end of the connecting rod does not need to be rotated many times. Just can complete fastening work, thereby can improve working efficiency.

In order to make the device simple in structure and easy to operate, the water inlet pipe and the exhaust pipe are both arranged through the fixed blocking plate.

In order to better fix the moving blocking plates and make the overall structure of the detection device more stable, there are 8 connecting rods, which are evenly connected around the two blocking plates.

The technical solution adopted by the present invention for solving the second technical problem comprises the following detection steps:

① Place the exhaust pipe to be tested on the support platform, and slide the movable blocking plate along the guide rail through the driving mechanism until the gaskets on the two blocking plates completely seal the nozzle of the drain pipe to be tested;

②Then use multiple connecting rods to connect and fix the fixed blocking plate and the moving blocking plate as a whole, and clamp the drain pipe to be tested tightly between the gaskets of the fixed blocking plate and the moving blocking plate;

③ Then open the first control valve, the water enters the drain pipe to be tested through the water inlet pipe, and the gas in the drain pipe to be tested is discharged through the hollow buoyancy ball and the exhaust pipe at the same time;

④ When water is discharged from the exhaust pipe, close the second control valve;

⑤Then continue to input water into the drain pipe to be tested until the pressure in the pressure gauge reaches the set value and close the first control valve;

⑥ After maintaining the pressure for the specified time, write down the leakage inspection records;

⑦ Finally, open the second and first control valves, and use the water inlet pipe to drain the water in the drain pipe to be tested;

⑧Remove the connecting rod and start the driving mechanism until the gasket on the moving blocking plate leaves the drain pipe to be tested.

Compared with the prior art, the present invention has the advantages that the movable blocking plate can slide along the guide rail on the base under the drive of the driving mechanism, so that the device can be used to test drainage pipes of various lengths and specifications, and the versatility of the device is improved , and the operation is simple and light; the exhaust design of the hollow buoyancy ball makes the exhaust port of the drain pipe unnecessary to be fixed on the top of the exhaust pipe to be tested, so that drain pipes with different inner diameters can be placed on the device for testing, further improving the Its universality makes the operation of the device more convenient, and also makes the detection method using the device simple, convenient, easy to operate and accurate in detection results.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a water pressure detection device in a drainage pipe in the present invention;

Fig. 2 is a three-dimensional structural schematic diagram of another direction of the water pressure detection device in the drain pipe of the present invention;

Fig. 3 is a sectional view along the A-A direction in Fig. 2;

Fig. 4 is a three-dimensional structure schematic diagram of the water pressure detection device in the drainage pipe in which the drainage pipe to be tested is placed in the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 4, a water pressure detection device in a drainage pipe includes a base 1, blocking plates standing upright at both ends of the base 1 and a plurality of connecting rods 5 connecting the two blocking plates, wherein the base 1 has a square structure , two guide rails 11 are arranged in parallel on the base 1, and two connecting rods 5 are evenly arranged on the inside of the two guide rails 11; Become the movable blocking plate 3, and the other blocking plate is the fixed blocking plate 2 fixed on the base 1, and the relative inner side of the fixed blocking plate 2 and the moving blocking plate 3 is provided with a sealing gasket 6 for blocking the mouth of the drain pipe B to be measured; In this embodiment, the above-mentioned fixed blocking plate 2 and the moving blocking plate 3 are all octagonal structures, and the above-mentioned connecting rods 5 are 8, and the two ends of each connecting rod 5 are respectively connected to the fixed blocking plate 2 and the moving blocking plate 3, And 8 connecting rods 5 are evenly connected around the two blocking plates, so that the fixed blocking plate 2 and the moving blocking plate 3 are connected and fixed as one, tightly clamping the drain pipe B to be tested, and each connecting rod 5 in this embodiment External thread 51 is shaped on both ends of each connecting rod 5, and each connecting rod 5 is formed by connecting the head and tail threads of a screw sleeve 52 successively by a multi-section supporting connecting rod, so that when detecting the shorter length of the drain pipe B to be tested, by reducing the number of supporting connecting rods To avoid the problem that the fastening nut at the end needs to move a long distance along the connecting rod 5 during the adjustment process of the moving blocking plate 3, which facilitates the operation.

The fixed blocking plate 2 is pierced with a water inlet pipe 9 that feeds water into the drain pipe B to be tested and an exhaust pipe 8 that discharges gas in the drain pipe B to be tested. pressure gauge 10 and a first control valve 91 used to control the water inlet pipe 9, and a second control valve 81 is installed in series on the exhaust pipe 8, so that when the gas in the drain pipe B to be tested is emptied, the exhaust pipe is closed. Trachea 9 prevents running water from leaking in the pipe. In the existing detection device, the nozzle at one end of the exhaust pipe is placed in the drain pipe to be tested. During the detection process, the nozzle needs to be limited to the top of the drain pipe, which makes the operation inconvenient, and is limited to the drain pipe at a certain height. Therefore, in the present embodiment, the end of the exhaust pipe 8 communicates with a hollow buoyancy ball 82 that can float on the water surface, and the top of the buoyancy ball 82 opens a row connected to the exhaust pipe 8 to be tested. Air holes 821, so that the exhaust can be easily exhausted without putting the end of the exhaust pipe 8 on top.

The base 1 is provided with a driving mechanism 13 that can drive the movable blocking plate 3 to move along the guide rail 11. The driving mechanism 13 includes a motor 131 and a screw mandrel 132 supported on the base 1 and a nut (not shown) that is threaded on the screw mandrel 132 ), the nut is fixed on the bottom of the moving blocking plate 3, and the screw mandrel 132 is linked with the output shaft of the motor 131.

Between the fixed blocking plate 2 and the moving blocking plate 1, a support platform 4 is provided for supporting the drain pipe to be tested. In this embodiment, the support platform 4 is composed of a base 42 and a support seat 41 superimposed on the base 42. And the support base 41 is provided with a V-shaped groove 441 for the drainage pipe B to be tested to sit in. In order to make the support table 41 move back and forth on the guide rail 11 to meet the needs of detecting drain pipes of different lengths, two U-shaped channel steels 43 which are upside down on the corresponding guide rail 11 are installed on the bottom of the base 42, and each U-shaped channel The steel 43 is provided with two rollers 431 rolling on the guide rail 11, so that the support platform 4 needs to be pushed according to the length of the drain pipe B to be tested before testing, so that the rollers 431 roll on the guide rail 11, thereby adjusting the support platform 11 to a suitable position. s position. In order to further adapt to the needs of drain pipes B to be tested at different heights, the support platform 4 is a lifting platform, which can move up and down driven by the lifting mechanism, so as to adjust the drain pipe B to a suitable height. The driving mechanism can be realized in many ways. In this embodiment, the lifting mechanism includes two jacks 421 arranged side by side.

Use the detection device described above to detect the detection method of the water pressure in the drain pipe, the method is as follows:

As shown in Figure 4, first place the drainage pipe B to be tested on the support platform 4, and make one end of the drainage pipe B stand on the fixed blocking plate 2, and adjust the jack 421 on the support platform 4 so that the fixed blocking plate 2 The sealing gasket 6 completely blocks the nozzle of the drain pipe B. Start the motor 131 to drive the screw mandrel 132 to rotate, so that the movable blocking plate 3 moves to the fixed blocking plate 2, until the sealing gasket 6 on the movable blocking plate 3 also completely blocks the mouth of the drain pipe B.

Then install 8 connecting rods 5 in sequence, and screw a fastening nut on the external thread at the end of each connecting rod 5, and tighten it, so that the drain pipe B to be tested is tightly clamped between the fixed blocking plate 2 and the Move between the gasket 6 of the blocking plate 3.

After the drainage pipe B to be tested is placed, the first control valve 91 is opened, and the water inlet pipe 9 connected to the tap water pipe starts to enter water (also can enter water through a water pump), and the water flow enters the drainage pipe B to be tested along the water inlet pipe 9. The gas in the drain pipe B is discharged along the exhaust pipe 8 through the vent hole 821 on the hollow buoyancy ball 82 under the action of water pressure. The hollow buoyancy ball 82 slowly floats up under the action of water buoyancy. When the gas in the drain pipe B is exhausted, the water flows through the exhaust hole 821 on the hollow buoyancy ball 82 and is discharged along the exhaust pipe 8. At this time, the second control valve 81 is closed. . Then continue to input water into the drain pipe B to be tested, close the first control valve 91 when the pressure in the pressure gauge 10 reaches the set value, keep the pressure for a specified time, and write down the leakage inspection record.

Finally, open the second and first control valves 81 and 91, reversely start the water pump, use the water inlet pipe 9 to drain the water in the drain pipe B to be tested, remove the connecting rod 5, and start the driving mechanism 13 until the moving blocking plate 3 The sealing gasket 6 leaves the drain pipe B to be tested, and the drain pipe B to be tested can be taken off from the supporting platform 4.

Claims (10)

1. A water pressure detection device in a drainpipe, comprising a base, a blocking plate upright at both ends of the base and a plurality of connecting rods connecting the two blocking plates, the blocking plate is pierced with a water inlet to the drainpipe to be tested A water inlet pipe and an exhaust pipe for discharging the gas in the drain pipe to be tested. The water inlet pipe is provided with a pressure gauge for testing the water pressure in the drain pipe to be tested and a first control valve for controlling the water inlet pipe. The exhaust pipe A second control valve is installed in series on the pipe, and it is characterized in that: the relative inner side of the two blocking plates is provided with a sealing gasket for blocking the mouth of the drain pipe to be tested, two guide rails are arranged in parallel on the base, and the two blocking plates The bottom of one of the blocking plates in the plates is fixed with a slider that slides on the guide rail so that the blocking plate becomes a moving blocking plate, and the other blocking plate is a fixed blocking plate fixed on the base, and the fixed blocking plate is connected with the A support platform for supporting the drain pipe to be tested is arranged between the moving blocking plates, and a driving mechanism capable of driving the moving blocking plate to move along the guide rail is provided on the base; and the exhaust pipe The end is connected with a hollow buoyancy ball capable of floating on the water surface, and the top of the buoyancy ball is provided with a vent hole connected with the drain pipe to be tested. 2. The water pressure detection device in the drainage pipe according to claim 1, characterized in that: the support platform is composed of at least one base and a support base superimposed on the base, and the support base is provided with A V-shaped groove for the drain pipe to be tested to sit in. 3. The water pressure detection device in the drainpipe as claimed in claim 2, characterized in that: two U-shaped channel steels which are upturned on the corresponding guide rails are installed on the bottom of the base, and each of the U-shaped grooves There are at least two rollers rolling on the guide rail inside the steel. 4. The water pressure detection device in the drainpipe according to claim 1, wherein the supporting platform is a lifting platform driven by a lifting mechanism and can move up and down. 5. The water pressure detection device in the drainpipe as claimed in claim 4, wherein the lifting mechanism is a jack; or the lifting mechanism is an air cylinder or a hydraulic cylinder, and the lifting platform is fixed on the on the piston rod of an air or hydraulic cylinder. 6. The water pressure detection device in the drainage pipe according to any one of claims 1 to 5, wherein the driving mechanism includes a motor, a screw rod supported on the base, and a screw threaded on the screw rod The nut is fixed on the bottom of the moving blocking plate, and the screw rod is linked with the output shaft of the motor. 7. The water pressure detection device in the drainpipe as claimed in claim 6, characterized in that: the two ends of each connecting rod are shaped with external threads, and each connection is connected by a multi-section branch connecting rod sequentially through a threaded head and tail thread. become. 8. The water pressure detection device in the drainage pipe according to claim 6, characterized in that: the water inlet pipe and the exhaust pipe are both arranged through the fixed blocking plate. 9. The water pressure detection device in the drainage pipe according to claim 6, wherein there are 8 connecting rods, which are evenly connected around the two blocking plates. 10. A detection method using the water pressure detection device in the drainage pipe according to claim 1, characterized in that: ① Place the exhaust pipe to be tested on the support platform, and slide the movable blocking plate along the guide rail through the driving mechanism until the gaskets on the two blocking plates completely seal the nozzle of the drain pipe to be tested; ②Then use multiple connecting rods to connect and fix the fixed blocking plate and the moving blocking plate as a whole, and clamp the drain pipe to be tested tightly between the gaskets of the fixed blocking plate and the moving blocking plate; ③ Then open the first control valve, the water enters the drain pipe to be tested through the water inlet pipe, and the gas in the drain pipe to be tested is discharged through the hollow buoyancy ball and the exhaust pipe at the same time; ④ When water is discharged from the exhaust pipe, close the second control valve; ⑤Then continue to input water into the drain pipe to be tested until the pressure in the pressure gauge reaches the set value and close the first control valve; ⑥ After maintaining the pressure for the specified time, write down the leakage inspection records; ⑦ Finally, open the second and first control valves, and use the water inlet pipe to drain the water in the drain pipe to be tested; ⑧Remove the connecting rod and start the driving mechanism until the gasket on the moving blocking plate leaves the drain pipe to be tested.