Waterproof ventilation type piezometric pipe orifice protection device

Abstract

The utility model provides a waterproof ventilation type pressure measuring pipe orifice protection device, which comprises an external protection box, a base and a top cover, wherein the base and the top cover are arranged in the external protection box; the base is welded to the top end of the piezometric tube, the top cover is in threaded connection with the top of the base, a cable hole and a vent hole are formed in the top cover, a waterproof connector is installed in the cable hole and used for allowing a sensor cable to pass through, and a vent column is installed in the vent hole and used for being connected with a vent tube; the bottom of the external protection box is embedded into the dam body and further provided with a drainage pipeline. The pressure measuring pipe orifice protection device provided by the utility model adopts a dual protection mode, has an excellent protection effect, and improves the safety performance; through the arrangement of the drainage channel, water can be rapidly drained even if invading, the water level in the pressure measuring pipe is prevented from rising, and the authenticity and accuracy of a measured value are guaranteed; by adopting the ventilation pipeline, the pressure measuring pipe is prevented from being completely closed to form a cavity, and the liquid level in the pipe can be always freely lifted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydraulic engineering relates to a waterproof vent type pressure measuring pipe mouth protection device. BACKGROUND

[0002] In the hydraulic engineering, pressure measuring pipe is the device that is drilled in dam body vertically, reflects the seepage pressure in dam body through monitoring water level in hole, is galvanized steel pipe of inside diameter 50mm generally, is provided with seepage pressure gauge in it. In order to prevent pressure measuring pipe from being blocked or damaged by foreign matter, a simple protective cover is generally installed at the pressure measuring pipe mouth. But for some pressure measuring pipes arranged in dam back overflow submerged area, after reservoir is discharged, the invading water can make the water level in pressure measuring pipe rise, influence the authenticity and accuracy of measured value. If the pressure measuring pipe is completely closed, cavity will be formed in the pressure measuring pipe, influence the free rise and fall change of liquid level in pipe. But the protective cover structure of the prior art cannot meet the needs of hydraulic engineering. UTILITY MODEL CONTENTS

[0003] To solve the above problems, the utility model provides a waterproof vent type pressure measuring pipe mouth protection device.

[0004] To achieve the above object, the technical scheme of the utility model is as follows:

[0005] A waterproof vent type pressure measuring pipe mouth protection device, comprising: an external protection box and a base and a top cover arranged inside the external protection box;The base is welded at the top end of the pressure measuring pipe, and the top cover is connected with the top of the base through threads, and a cable hole and a vent hole are formed in the top cover, a waterproof joint is arranged in the cable hole, the waterproof joint is used for sensor cable passing, and a vent column is arranged in the vent hole, and the vent column is used for connecting with a vent pipe;The bottom of the external protection box is embedded in the dam body, and a drain pipe is further arranged at the bottom of the external protection box.

[0006] Further, the top cover is provided with an O-shaped ring on the side.

[0007] Further, the vent column is connected with the vent hole through threads.

[0008] Further, the vent column is cylindrical, and the end of the vent pipe is tightly wrapped around one end of the vent column away from the vent hole.

[0009] Further, the external protection box comprises a box body and a flip cover connected with the box body through a rotating shaft.

[0010] Further, the drain pipe is arranged on the dam body in the bottom area of the external protection box.

[0011] Further, the bottom area dam of the external protection box is further provided with a cable channel and a ventilation pipe for the sensor cable and the ventilation pipe to pass out, and the sensor cable and the ventilation pipe are connected to the measuring station.

[0012] The utility model discloses beneficial effect is:

[0013] The pressure measuring pipe mouth protection device provided by the utility model adopts double protection mode, has excellent protection effect, and improves safety performance.

[0014] The utility model discloses through drainage channel setting, even if there is water body invasion also can remove rapidly, prevent the water level in pressure measuring pipe from rising, guarantee the authenticity and accuracy of measurement value.

[0015] The utility model discloses ventilation pipe setting, avoid pressure measuring pipe completely closed and form cavity, guarantee the liquid level in pipe can always freely lift. DRAWINGS

[0016] Figure 1 It is the side view of the waterproof ventilation type pressure measuring pipe mouth protection device provided by the utility model.

[0017] Figure 2 It is the inside plan of the external protection box.

[0018] 1-base, 2-top cover, 3-external protection box, 4-pressure measuring pipe, 5-O ring, 6-waterproof joint, 7-ventilation column, 8-ventilation pipe, 9-sensor cable, 11-drainage pipe, 12-tool hole, 13-flap, 14-cable channel, 15-ventilation pipe. CONCRETE IMPLEMENTING METHOD

[0019] The following will combine specific embodiment and carry out detailed description to the technical scheme provided by the utility model, and should understand that the following specific implementing mode is only used for explaining the utility model and is not used for limiting the scope of the utility model.

[0020] As Figure 1 , Figure 2As shown, the utility model provides a waterproof and ventilating type pressure measuring pipe mouth protection device, including base 1, top cap 2, external protection box 3, base 1, top cap 2 all are arranged in the external protection box. The base 1 is cylindrical, is welded on the original pressure measuring pipe 4, therefore the base 1 size needs to be matched with the pressure measuring pipe 4 size, the base 1 inside diameter is same with the pressure measuring pipe 4 inside diameter, and the outside diameter is slightly narrow. The base 1 top end is provided with internal thread, and the top cap 2 periphery is provided with external thread, and the base 1 top is connected with the top cap 2 through thread. The top cap 2 side is provided with O ring 5, has good waterproof effect. The top cap 2 is provided with cable hole, and PG type waterproof joint 6 is installed on the cable hole, and is used for setting sensor cable 9. The top cap 2 is also provided with air hole, and the air hole is provided with air column 7, and the air column 7 is cylindrical and hollow, and the bottom is connected with the air hole through thread, and the air column 7 is also connected with air pipe 8. The external protection box 3 covers the pressure measuring pipe 4, base 2, top cap 2, sensor cable 9 and air pipe 8, to prevent damage by external force. The external protection box bottom is provided with drain pipe 11.

[0021] As an improvement, the top cap surface is provided with a tool hole 12, which can be provided with a special shape (not shown in the figure), and a special tool is used to open the top cap, improving safety.

[0022] More specifically, the bottom of the external protection box 3 is hollow (designed without a bottom), directly receiving the dam body. The protection box body is cylindrical, with its bottom embedded in the dam surface and its top connected to a flip cover 13 through a rotating shaft. The flip cover 13 side should be provided with a sealing ring to achieve good waterproof effect. As an improvement, the flip cover 13 can also be locked on the protection box body, enhancing safety and protection performance. The dam body is provided with a drain pipe 11 at the bottom of the protection box. Figure 1 As shown, the protection box bottom is also provided with a cable channel 14 and an air duct 15 for the sensor cable 9 and the air pipe 8 to pass out, respectively. The sensor cable 9 and the air pipe 8 are connected to the measuring station. The air duct 15 is connected to the atmosphere, achieving the air ventilation effect.

[0023] The installation process of the waterproof and ventilating type pressure measuring pipe mouth protection device is as follows:

[0024] The base 1 is connected to the original pressure measuring pipe 4 by welding, requiring the joint to be fully welded without gaps to prevent water from entering the pressure measuring pipe 4.

[0025] The top cap 2 is connected to the base 1 by screwing, and an O ring 5 is provided at the contact part of the top cap 2 and the base 1 to achieve waterproof function.

[0026] The PG type waterproof joint 6 is installed on the top cap cable hole, and the sensor cable 9 passes through the PG type waterproof joint to achieve the fixation of the sensor cable 9 and the waterproof of the cable outlet end.

[0027] The venting column 7 is installed on the top cover vent hole by screw connection, and the venting pipe 8 is tightly wrapped outside the venting column 7 to realize the connection of the air pressure in the pipe with the atmospheric pressure.

[0028] The sensor cable and the venting pipe 8 are laid together from the bottom of the protection box and pulled to a data acquisition box or a measuring station;

[0029] The external protection box 3 is installed, and the flip cover is locked to cover the pressure measuring pipe, the base, the top cover, the sensor cable and the venting pipe.

[0030] It should be noted that the above content only illustrates the technical thought of the present application, and cannot limit the protection scope of the present application. For ordinary skilled in the art, some improvements and refinements can be made without departing from the principle of the present application, and these improvements and refinements fall within the protection scope of the present application.

Claims

1. A waterproof and ventilated pressure testing port protection device, characterized in that, The utility model relates to a kind of sensor protection box, including: External protective box (3) and the base (1) and top cover (2) being arranged inside external protective box (3);The base (1) is welded in the top end of pressure pipe (4), the top cover (2) is connected with the top of base (1) by screw thread, the top cover (2) is equipped with cable hole and air hole, waterproof joint (6) is installed in the cable hole, the waterproof joint (6) is used for sensor cable (9) to pass, air column (7) is installed in the air hole, the air column (7) is used for being connected with air pipe (8);The bottom of external protective box (3) is embedded dam body, and the bottom of external protective box (3) is further provided with drainage pipeline (11).

2. The waterproof vented piezometer port protector of claim 1, wherein, The top cover (2) side is provided with O ring (5).

3. The waterproof vented piezometer port protector of claim 1, wherein, The air column (7) is connected with air hole by screw thread.

4. The waterproof vented piezometer port protector of claim 1 or 3, wherein, The air column (7) is cylindrical, and the air pipe (8) end is tightly wrapped in the end of air column (7) away from air hole.

5. The waterproof vented piezometer port protector of claim 1, wherein, The external protective box (3) includes box body and flip cover (13) connected with box body by pivot.

6. The waterproof vented piezometer port protector of claim 1, wherein, The drainage pipeline (11) is arranged on the dam body in the bottom area of external protective box (3).

7. The waterproof vented piezometer port protector of claim 6, wherein, The dam body in the bottom area of external protective box (3) is further provided with cable channel (14) and air pipe (15), respectively for sensor cable (9) and air pipe (8) to pass out, and the sensor cable (9) and air pipe (8) are connected to station.

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