Gas lift reverse circulation mud suction device for deepwater bridge

Abstract

The utility model relates to an air lift reverse circulation mud suction device for a deepwater bridge, which belongs to the technical field of bridge construction and comprises a water jet pipe, a slag discharge pipe, an air supply pipe and a plurality of steel plates. The slag discharging pipe is hollow, the lower portion of the air supply pipe is communicated with the lower portion of the slag discharging pipe and used for conveying compressed air into the slag discharging pipe, the water jetting pipe is arranged on one side of the slag discharging pipe, the bottom of the water jetting pipe is higher than the bottom of the slag discharging pipe, the water jetting pipe is used for providing high-pressure water, and the slag discharging pipe discharges muddy water upwards; the air supply pipe, the water jetting pipe and the slag discharging pipe are formed by welding the steel plates on site, the habitual activity space among the air supply pipe, the water jetting pipe and the slag discharging pipe is limited, the stability of the whole device is enhanced, and steel plate welding provides additional support; and structure looseness or damage caused by water flow scouring can be prevented, it can be guaranteed that the position of the slag discharging pipe in water is stable, and floating is not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge construction technical field, concretely relates to a gas lift reverse circulation suction device for deep water bridge. BACKGROUND

[0002] With the continuous progress of bridge construction technology, the construction of bridge often faces complex geological and hydrological conditions, especially when carrying out foundation construction, a large amount of underwater soil and sediment needs to be handled, and the conventional suction device usually adopts suction pipe to directly suck mud, but in deep water environment, the suction pipe is easy to float due to water flow and water pressure and other factors, thereby affecting the suction effect and construction efficiency.

[0003] At present, the common suction method for deep water bridge foundation construction includes gas lift reverse circulation suction, especially in deep water environment, due to the action of water flow and water pressure, the suction pipe is easy to float, which not only affects the suction efficiency, but also may cause the collision between the suction pipe and the surrounding structure, increases the construction risk, in addition, the floating may also lead to the decrease of the sealing property between the suction pipe and the drill hole.

[0004] Therefore, a gas lift reverse circulation suction device for deep water bridge is needed, which can work stably and reduce floating. SUMMARY

[0005] In order to solve the above problems in the prior art, the utility model provides a gas lift reverse circulation suction device for deep water bridge, which solves the technical problem of floating of the existing discharge pipe when sucking mud in water.

[0006] The purpose of the utility model can be realized by the following technical scheme:

[0007] A gas lift reverse circulation suction device for deep water bridge, comprising a water jet pipe, a discharge pipe, a gas supply pipe and a plurality of steel plates, the discharge pipe is hollow inside, the lower part of the gas supply pipe is communicated with the lower part of the discharge pipe, for conveying compressed air into the discharge pipe, the water jet pipe is arranged on one side of the discharge pipe, and the bottom of the water jet pipe is higher than the bottom of the discharge pipe, the water jet pipe is used for providing high pressure water, and the discharge pipe discharges mud water upward.

[0008] The gas supply pipe and the water jet pipe are welded to the discharge pipe through the steel plates.

[0009] Preferably, the lower part of the water jet pipe is provided with a water jet port, and the diameter of the water jet port is smaller than the pipe diameter of the water jet pipe.

[0010] Preferably, the number of steel plates for welding the water jet pipe is at least two, and the steel plates are uniformly arranged at both ends of the water jet pipe, and the thickness of the steel plate arranged at the bottom of the water jet pipe is greater than the thickness of the steel plate arranged at the upper part.

[0011] Preferably, the air supply pipe, the water jet pipe and the residue discharge pipe are all seamless steel pipes and are all arranged in the cofferdam.

[0012] Preferably, the bottom of the residue discharge pipe is further provided with a fan blade, the fan blade is arranged at the bottom of the residue discharge pipe in a cross shape, and the fan blade is made of 14mm steel material.

[0013] Preferably, the air supply pipe is radially L-shaped, and a screen is arranged at the connection position of the air supply pipe, the screen being used for preventing the mud water from being blocked.

[0014] Preferably, the air supply pipe, the water jet pipe and the residue discharge pipe are all seamless steel pipes and are all arranged in the cofferdam.

[0015] The air supply pipe, the water jet pipe and the residue discharge pipe are welded on site by steel plates, the habitual activity space among the three is limited, the stability of the whole device is enhanced, the steel plate welding not only provides additional support, but also prevents the structure from loosening or being damaged due to water flow scouring, and helps to ensure that the position of the residue discharge pipe in the water is stable and is not easy to float.

[0016] The air supply pipe, the water jet pipe and the residue discharge pipe are welded on site by steel plates, the habitual activity space among the three is limited, the stability of the whole device is enhanced, the steel plate welding not only provides additional support, but also prevents the structure from loosening or being damaged due to water flow scouring, and helps to ensure that the position of the residue discharge pipe in the water is stable and is not easy to float. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to facilitate those skilled in the art to understand, the utility model will be further described below in combination with the drawings.

[0018] Fig. 1 The sectional structure schematic view of the suction device provided in an embodiment of the utility model is shown in the figure.

[0019] Fig. 2 The structure schematic view of the air-lift reverse circulation suction device provided in an embodiment of the utility model is shown in the figure.

[0020] Legend: 1, residue discharge pipe; 2, high-pressure water pump; 3, water jet pipe; 4, rubber pipe; 5, air supply pipe; 6, screen; 7, steel plate; 8, fan blade; 9, air compressor; 10, cofferdam. DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific implementation, structure, features and effects of the utility model will be described in detail below in combination with the drawings and preferred embodiments.

[0022] As Figs. 1-2As shown, the air-lift reverse circulation suction device for deep water bridge includes a water jet pipe 3, a slag discharge pipe 1, a gas supply pipe 5 and a plurality of steel plates 7; the slag discharge pipe 1 is hollow inside, the lower part of the gas supply pipe 5 is communicated with the lower part of the slag discharge pipe 1, and is used for conveying compressed air into the slag discharge pipe 1, the water jet pipe 3 is arranged on one side of the slag discharge pipe 1, and the bottom of the water jet pipe 3 is higher than the bottom of the slag discharge pipe 1, the water jet pipe 3 is used for providing high-pressure water, and the slag discharge pipe 1 discharges the mud-water upward; the gas supply pipe 5 and the water jet pipe 3 are welded on the slag discharge pipe 1 through the steel plates 7;

[0023] The lower part of the gas supply pipe 5 is communicated with the lower part of the slag discharge pipe 1, and the air-lift effect is formed by conveying compressed air into the slag discharge pipe 1; when the compressed air rises in the slag discharge pipe 1, an upward buoyancy is generated, which helps to push the mud-water mixture upward, and at the same time, the air-lift effect can also effectively prevent the slag discharge pipe 1 from sinking or excessively swinging due to the weight of the mud-water; the water jet pipe 3 is arranged on one side of the slag discharge pipe 1, and the bottom of the water jet pipe 3 is higher than the bottom of the slag discharge pipe 1, the high-pressure water is injected into the inside of the slag discharge pipe 1 through the water jet pipe 3, and forms a reverse circulation with the compressed air and the mud-water mixture, which helps to further stir the mud-water, so that it is more easily sucked into the slag discharge pipe 1 and discharged upward, and at the same time, the reverse circulation can also increase the pressure inside the slag discharge pipe 1, which helps to stabilize the position of the slag discharge pipe 1;

[0024] The gas supply pipe 5, the water jet pipe 3 and the slag discharge pipe 1 are welded on site through the steel plates 7, the steel plates 7 are selected to be 10*10*1cm specifications, and the welding seams between the gas supply pipe 5, the water jet pipe 3 and the slag discharge pipe 1 are full, the gas supply pipe 5, the water jet pipe 3 and the slag discharge pipe 1 are welded together, which limits the habitual activity space between the three, enhances the stability of the entire device, and the welding of the steel plates 7 not only provides additional support, but also prevents the structure from loosening or being damaged due to water flow, which helps to ensure the stability of the position of the slag discharge pipe 1 in the water and prevent floating.

[0025] In an embodiment, the lower part of the water jet pipe 3 is provided with a water jet opening, the upper part of the water jet pipe 3 is connected with the high-pressure water pump 2, the high-pressure water pump 2 is used for outputting high-pressure water into the water jet pipe 3, and the diameter of the water jet opening is smaller than the pipe diameter of the water jet pipe 3, specifically, the diameter of the water jet opening is reduced by 8mm than the pipe diameter, so as to increase the water jet pressure.

[0026] In an embodiment, the number of steel plates 7 used to weld the water jet pipe 3 is at least two, evenly arranged at both ends of the water jet pipe 3, not only dispersing the stress of the welding points and reducing the structural weakness that may be caused by single-point welding, but also enhancing the connection strength between the water jet pipe 3 and the deslagging pipe 1 through multi-point fixation; the welding of multiple steel plates 7 makes the water jet pipe 3 more stably fixed on the deslagging pipe 1, and even in the case of strong water flow or high-pressure water jet, it can maintain its position unchanged. The thickness of the steel plate 7 arranged at the bottom of the water jet pipe 3 is greater than that of the steel plate 7 arranged at the upper part. This differentiated design takes into account the stress condition of the water jet pipe 3 during use. The bottom steel plate 7 needs to withstand greater water pressure and scouring force, so a thicker steel plate 7 is used to improve its pressure resistance and scouring resistance. The upper steel plate 7 can use a thinner steel plate 7 to reduce the weight of the entire device, ensuring the strength of the water jet pipe 3 at the key position and optimizing the weight distribution of the overall structure.

[0027] In an embodiment, the air supply pipe 5, the water jet pipe 3, and the deslagging pipe 1 are all seamless steel pipes and are arranged within the cofferdam 10. Seamless steel pipes have higher strength and better sealing performance than seamed steel pipes. In deep water environments, seamless steel pipes can better withstand water pressure, scouring force, and other external forces, reducing the risk of reduced suction efficiency and safety hazards caused by pipe rupture or leakage. The inner wall of the seamed steel pipe is smooth, reducing the resistance and energy loss of the fluid flowing in the pipe. For the air supply pipe 5, this helps to ensure that compressed air is delivered to the deslagging pipe 1 with higher efficiency, forming a stronger gas lift effect. For the water jet pipe 3, the smooth inner wall allows high-pressure water to be more smoothly injected into the deslagging pipe 1, enhancing the reverse circulation effect. In addition, arranging the air supply pipe 5, the water jet pipe 3, and the deslagging pipe 1 within the cofferdam 10 helps to reduce the direct impact and disturbance of external water flow on the pipes. The cofferdam 10 provides a relatively stable working environment, allowing the pipe system to better perform its functions and reducing the risk of pipe displacement or damage caused by water scouring.

[0028] In an embodiment, the bottom of the deslagging pipe 1 is also provided with a fan blade 8, which is arranged in a cross shape at the bottom of the deslagging pipe 1. The fan blade 8 is made of 14mm steel material. When the compressed air and high-pressure water in the deslagging pipe 1 jointly push the mud-water mixture upward, the fan blade 8 will rotate with the fluid flow in the deslagging pipe 1. The rotation of the fan blade 8 produces additional stirring effect, which helps to more effectively involve the mud deposited at the bottom or around the deslagging pipe 1 into the pipe, thereby improving the mud suction efficiency. The fan blade 8 is arranged in a cross shape at the bottom of the deslagging pipe 1, which can more evenly distribute the stirring effect and reduce the dead angle of fluid flow. At the same time, the cross-shaped layout also helps to guide the fluid to flow along the inner wall of the deslagging pipe 1, reducing the erosion and wear of the fluid to the pipe wall and prolonging the service life of the deslagging pipe 1. The fan blade 8 is made of 14mm steel material, which has high strength and wear resistance. In a deep water environment, the fan blade 8 needs to withstand a large amount of water flow and wear of the mud-water mixture. Therefore, using thick steel material can ensure that the fan blade 8 is not easily damaged during long-term use and maintains its stirring effect.

[0029] In an embodiment, the air supply pipe 5 is radially L-shaped. The air supply pipe 5 adopts a radial L-shaped design, which means that it extends from the main air source and then bends at a certain angle to connect to the lower part of the deslagging pipe 1. This design allows compressed air to enter the deslagging pipe 1 more directly, reducing the turning and loss of airflow in the pipe, improving the efficiency of the gas lift effect, and setting a screen 6 at the connection between the air supply pipe 5 and the deslagging pipe 1. The screen 6 has a moderate pore size that allows compressed air to pass through while effectively blocking mud and impurities from entering the air supply pipe 5. In this way, even if the deslagging pipe 1 is filled with mud-water mixture, the screen 6 can still play a filtering role to prevent the mud from clogging the air supply pipe 5, ensuring the continuous supply of compressed air.

[0030] In an embodiment, it also includes a rubber pipe 4 and an air compressor 9. The air compressor 9 is arranged on the ground. The air compressor 9 is connected to the air supply pipe 5 through the rubber pipe 4. The air compressor 9 delivers compressed air to the air supply pipe 5 through the rubber pipe 4. The rubber pipe 4 serves as a bridge connecting the air compressor 9 and the air supply pipe 5, and has good flexibility, high pressure resistance, corrosion resistance and other characteristics, which can adapt to different terrains and environments, ensuring the safe and stable transmission of compressed air from the air compressor 9 to the air supply pipe 5.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical solution of the present application. Any indirect modification, equivalent change and modification of the above embodiments based on the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. An air-lift reverse circulation suction dredging apparatus for deep water bridge construction, characterized by, It comprises a water jet pipe, a residue discharge pipe, a gas supply pipe and several steel plates; the residue discharge pipe is hollow inside, the lower part of the gas supply pipe is communicated with the lower part of the residue discharge pipe for conveying compressed air into the residue discharge pipe, the water jet pipe is arranged on one side of the residue discharge pipe and the bottom of the water jet pipe is higher than the bottom of the residue discharge pipe, the water jet pipe is used for providing high pressure water, and the residue discharge pipe discharges sludge water upward; The gas supply pipe and the water jet pipe are welded to the residue discharge pipe through the steel plates.

2. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 1, characterized in that, The lower part of the water jet pipe is provided with a water jet opening, and the diameter of the water jet opening is smaller than the diameter of the water jet pipe.

3. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 2, characterized in that, The number of the steel plates used for welding the water jet pipe is at least two, and the steel plates are uniformly arranged at both ends of the water jet pipe; the thickness of the steel plate arranged at the bottom of the water jet pipe is greater than the thickness of the steel plate arranged at the upper part.

4. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 1, characterized in that, The gas supply pipe, the water jet pipe and the residue discharge pipe are all seamless steel pipes and are arranged in a cofferdam.

5. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 1, characterized in that, The bottom of the residue discharge pipe is further provided with a fan blade, the fan blade is arranged in a cross shape at the bottom of the residue discharge pipe; the fan blade is made of 14mm steel material.

6. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 1, characterized in that, The gas supply pipe is in a radial L shape, and a screen is arranged at the connection of the gas supply pipe, the screen is used for preventing sludge water from being blocked.

7. The air-lift reverse circulation mud-suction device for deep-water bridge according to claim 1, characterized in that, It further comprises a rubber pipe and an air compressor; the air compressor is arranged on the ground, and the air compressor is connected with the gas supply pipe through the rubber pipe.

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