Combined water excavation platform

Abstract

The present invention discloses a combined water excavation platform, which relates to the field of water conservancy engineering equipment, including a main float and two auxiliary floats located on both sides of the main float, wherein the main float and the auxiliary floats are connected to each other through a positioning and locking mechanism to form a platform as a whole, wherein the positioning and locking mechanism includes: a limiting component, an axial rotation component, and a traction rope mechanism. The present invention arranges a limiting component on the main float, thereby intercepting and limiting the auxiliary float close to the main float, so that the end of the auxiliary float is flush with the end of the main float, and then the traction rope mechanism applies a traction force to the auxiliary float to move toward the main float, thereby realizing rapid positioning and splicing between the main float and the auxiliary float, reducing the time consumption of the assembly and splicing process, and facilitating the progress of water operations, and the whole process is simple and convenient to operate, and has good practical significance.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering equipment, in particular to a combined water excavation platform. Background Art

[0002] The water excavation platform is a floating device that provides support for excavators and other dredging equipment to operate on the water, allowing excavators and other dredging equipment to perform water conservancy operations such as excavation, dredging, and dredging on the water;

[0003] The existing Chinese patent publication number is: CN220577478U, and the name of the patent is "an excavator water working platform". The patent includes "a left platform unit and a right platform unit, and the left platform unit and the right platform unit are spliced ​​with each other through front and rear locking mechanisms to form a platform body; a bearing groove is provided in the middle of the upper surface of the platform body, and the width and length of the bearing groove match the width and length of the lower part of the excavator; positioning piles are provided on the left and right sides of the platform body, and the positioning piles are inserted into the river bottom for fixing. The utility model provides an excavator water working platform, which can improve stability and flexibility";

[0004] Since the excavation platform is usually composed of two or more floating platform units, the floating platform units are usually connected into a whole through corresponding locking mechanisms at the construction site. The disadvantage of the existing technical solutions is that when the floating platforms are docked, large water surface fluctuations may occur, causing the floating platform units to sway, making it difficult to align and lock the locking pin and the locking mouth of the locking mechanism, making it inconvenient to position, resulting in a long assembly and splicing process, which affects the progress of water operations. In order to solve the above problems, we propose a modular water excavation platform. Summary of the invention

[0005] The purpose of the present invention is to provide a combined water excavation platform to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A combined water excavation platform comprises a main floating body and two auxiliary floating bodies located on both sides of the main floating body, wherein the main floating body and the auxiliary floating bodies are connected to form a whole platform through a positioning locking mechanism, and the positioning locking mechanism comprises:

[0008] A limiting assembly, comprising a limiting beam having a raised position and a submerged position, wherein the limiting beam can intercept and limit the auxiliary floating body in the raised position so that the end of the auxiliary floating body is flush with the end of the main floating body;

[0009] The shaft rotation assembly includes a shaft rotation tube rotatably plugged into the end of the main floating body, one end of the shaft rotation tube is fixed to the limit beam, and the other end of the shaft rotation tube is transmission-connected to a driving mechanism located inside the main floating body, and the shaft rotation mechanism can control the limit beam to switch between a raised position and a submerged position;

[0010] The traction rope mechanism comprises a winch mechanism installed on the main floating body, the traction rope on the winch mechanism is connected to the corresponding auxiliary floating body, and the winch mechanism applies traction force to the auxiliary floating body to move toward the main floating body when in a reeled state.

[0011] Preferably, a cavity is provided inside the beam body of the position-limiting beam, a connecting port is provided at the bottom of the cavity, and the cavity is communicated with the shaft rotating tube.

[0012] Preferably, the driving mechanism includes an air pump, the airflow connecting end of the air pump is fixedly connected to a connecting cylinder, the cylinder mouth of the connecting cylinder is rotatably connected to the shaft tube, and when the air pump blows air toward the connecting cylinder, the limit beam switches from the submerged position to the raised position, and when the air pump inhales air toward the connecting cylinder, the limit beam switches from the raised position to the submerged position.

[0013] Preferably, a sealing plug assembly is provided in the axial rotation tube, and the sealing plug assembly includes a piston column, a first air guide groove is provided on the side surface of one end of the piston column, a second air guide groove is provided on the side surface of the other end of the piston column, a first wall groove that can be connected to the first air guide groove is also provided on the inner wall of the axial rotation tube, and a second wall groove that can be connected to the second air guide groove is also provided on the inner wall of the axial rotation tube.

[0014] Preferably, an extension strip is fixed on the body of the piston column, a flat sleeve is movably sleeved on the other end of the extension strip, and the end of the flat sleeve is fixed to the bottom of the connecting cylinder.

[0015] Preferably, a locking assembly is provided between the auxiliary floating body and the main floating body, and the locking assembly includes a locking seat unit fixed to the side of the auxiliary floating body and a locking unit installed on the limiting assembly, and the locking unit is locked with the locking seat unit when the limiting beam is in the submerged position.

[0016] Preferably, the lock base unit comprises a base block, a hook groove structure is provided on a side of the base block, the hook groove structure comprises an inserting groove, and a sinking groove is provided at the bottom of the inserting groove.

[0017] Preferably, a slope block is provided between the bottom end of the plug-in slot and the sinking slot.

[0018] Preferably, the locking unit comprises a clamping column that can be clamped with the hook groove structure, and the side surface of the limiting beam is provided with a plug-in blind opening that is adapted to be rotatably mounted with the clamping column.

[0019] Preferably, the cylindrical surface of the clamping column is a smooth surface, and the axis line of the clamping column is parallel to the length direction line of the main floating body.

[0020] In the above technical scheme, the present invention provides a combined water excavation platform, which intercepts and limits the auxiliary float close to the main float by arranging a limit assembly on the main float, so that the end of the auxiliary float is flush with the end of the main float, and then the traction rope mechanism applies traction to the auxiliary float to move toward the main float, thereby realizing rapid positioning and splicing between the main float and the auxiliary float, and utilizing the buoyancy of water to realize locking and unlocking between the main float and the auxiliary float, thereby reducing the time consumption of the assembly and splicing process, and making unlocking and locking more convenient, which is conducive to speeding up the progress of water operations, and the whole process is simple and convenient to operate, and has good practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the assembled state of a combined water excavation platform of the present invention;

[0023] Figure 2 It is an overall schematic diagram of a combined water excavation platform of the present invention after the main floating body and the auxiliary floating body are assembled;

[0024] Figure 3 It is a cross-sectional schematic diagram of a limit beam of a combined water excavation platform of the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of an axis-rotating tube of a combined water excavation platform of the present invention;

[0026] Figure 5 It is a perspective schematic diagram of a piston column of a combined water excavation platform of the present invention in an axial rotation tube;

[0027] Figure 6 It is a schematic diagram of the partial connection between the clamping column and the limiting beam of a combined water excavation platform of the present invention;

[0028] Figure 7 The present invention is a schematic diagram of a locking unit of a combined water excavation platform on the side of a secondary floating body.

[0029] Description of reference numerals:

[0030] 1. Main floating body; 2. Auxiliary floating body; 3. Limiting assembly; 3.1. Limiting beam; 3.2. Cavity; 3.3. Connecting port; 3.4. Extension rod; 4. Axis rotation assembly; 4.1. Axis rotation tube; 4.2. Driving mechanism; 4.21. Air pump; 4.22. Connecting tube; 4.3. Slide rail groove; 4.4. Sliding block; 4.5. Clamping groove; 5. Sealing plug assembly; 5.1. Piston column; 5.11. Extension strip; 5.12. Flat sleeve; 5.2. First air guide slot; 5.3, second air guide slot; 5.4, first wall slot; 5.5, second wall slot; 6, locking assembly; 6.1, lock seat unit; 6.11, base block; 6.12, hook slot structure; 6.121, plug-in slot; 6.122, sinking slot; 6.123, inclined block; 6.2, locking unit; 6.21, card column; 6.22, plug-in blind port; 6.23, rotating bearing; 7, traction rope mechanism; 7.1, winch mechanism; 7.2, traction rope. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-7 The embodiment of the present invention provides a combined water excavation platform, comprising a main floating body 1 and two auxiliary floating bodies 2 located on both sides of the main floating body 1. The main floating body 1 and the auxiliary floating bodies 2 are connected to form a platform as a whole through a positioning locking mechanism. The positioning locking mechanism includes:

[0033] The limiting assembly 3 includes a limiting beam 3.1 having a raised position and a submerged position. The limiting beam 3.1 can intercept and limit the auxiliary floating body 2 in the raised position so that the end of the auxiliary floating body 2 is flush with the end of the main floating body 1;

[0034] The shaft rotation assembly 4 includes a shaft rotation tube 4.1 which is rotatably plugged into the end of the main floating body 1, one end of the shaft rotation tube 4.1 is fixed to the limit beam 3, and the other end of the shaft rotation tube 4.1 is transmission-connected to a driving mechanism 4.2 located inside the main floating body 1, and the shaft rotation mechanism 4 can control the limit beam 3 to switch between the lifting position and the submerged position;

[0035] A traction rope mechanism 7, which includes a winch mechanism 7.1 installed on the main floating body 1, a traction rope 7.2 on the winch mechanism 7.1 is connected to the corresponding auxiliary floating body 2, and the winch mechanism 7.1 applies a traction force to the auxiliary floating body 2 to move toward the main floating body 1 when it is in a reeled state, a moving pallet is installed at the bottom, and a track for the moving pallet to move is installed on the main floating body 1, and the winch mechanism 7.1 can move along the length direction of the main floating body 1 to change its position;

[0036] The main buoy 1 and the auxiliary buoy 2 are both cabin buoys. The excavation equipment is installed on the main buoy 1. During transportation, the main buoy 1 and the auxiliary buoys 2 are separated to reduce the volume and facilitate transportation. When arriving at the actual operation site, the main buoy 1 and the auxiliary buoys 2 are arranged and assembled to form a complete excavation platform.

[0037] During the actual assembly process, the limiting beam 3.1 is switched to the lifting position through the axial rotation component, and under the pulling action of the traction rope mechanism 7, the corresponding auxiliary float 2 moves toward the position of the main float 1. When the auxiliary float 2 contacts the limiting beam 3.1, the end of the auxiliary float 2 is flush with the end of the main float 1, thereby positioning the auxiliary float 2 in the length direction of the main float 1, until the auxiliary float 2 is flush with the main float 1 under the pulling action of the traction rope mechanism 7, thereby realizing rapid positioning and splicing between the main float 1 and the auxiliary float 2, reducing the time-consuming assembly and splicing process, and helping to speed up the progress of water operations. In addition, the entire process is simple and convenient to operate, and has good practical significance.

[0038] In another embodiment provided by the present invention, a cavity 3.2 is provided inside the beam body of the limiting beam 3.1, a connection port 3.3 is provided at the bottom of the cavity 3.2, the cavity 3.2 is connected to the shaft rotating tube 4.1, preferably, the limiting beam 3.1 is a hollow column structure, the cross section of the limiting beam 3.1 is rectangular, the axis of the shaft rotating tube 4.1 is perpendicular to the length direction line of the limiting beam 3.1, and the axis of the shaft rotating tube 4.1 is parallel to the length direction line of the main floating body 1;

[0039] Specifically, the connection port 3.3 can guide the external water flow into the cavity 3.2. When the cavity 3.2 is filled with water, the buoyancy of the limit beam 3.1 is much smaller than the weight of the limit beam 3.1 itself, and the limit beam 3.1 is in a submerged position. Similarly, when the water in the cavity 3.2 is emptied, the buoyancy of the limit beam 3.1 is much larger than the weight of the limit beam 3.1 itself, and the limit beam 3.1 is in a raised position.

[0040] Furthermore, an extension rod 3.4 is fixed to one end of the limiting beam 3.1 away from the main floating body 1. The deviation angle between the length direction line of the extension rod 3.4 and the length direction line of the limiting beam 3.1 ranges from 5 degrees to 30 degrees, and the deviation angle between the length direction line of the extension rod 3.4 and the length direction line of the limiting beam 3.1 is 8 degrees. When the limiting beam 3.1 is in the raised position, the extension rod 3.4 and the limiting beam 3.1 form a fan-shaped capture area on the side of the main floating body 1. In actual use, the auxiliary floating body 2 is pulled into the fan-shaped capture area by the towing rope mechanism 7. During the pulling process, the activity range of the auxiliary floating body 2 is gradually reduced, which is conducive to the rapid positioning and splicing between the main floating body and the auxiliary floating body.

[0041] In another embodiment provided by the present invention, the driving mechanism 4.2 includes an air pump 4.21, which is preferably a dual-purpose pump for inflation and degassing. A connecting tube 4.22 is fixedly connected to the airflow connection end of the air pump 4.21. The connecting tube 4.22 is fixed to the main floating body 1. The axis of the connecting tube 4.22 coincides with the axis of the shaft rotating tube 4.1. The tube mouth of the connecting tube 4.22 is rotatably connected to the shaft rotating tube 4.1. The connecting tube 4.22 and the shaft rotating tube 4.1 form a guide. Air channel, when the air pump 4.21 inflates toward the connecting tube 4.22, thereby emptying the water in the cavity 3.2, the limit beam 3.1 switches from the submerged position to the raised position, and when the air pump 4.21 draws air from the connecting tube 4.22, the air pressure in the cavity 3.2 decreases, and the connecting port 3.3 can introduce the external water flow into the cavity 3.2, so that the air pump 4.21 draws air toward the connecting tube 4.22, and the limit beam 3.1 switches from the raised position to the submerged position;

[0042] Furthermore, a sealing plug assembly 5 is provided in the shaft rotating tube 4.1, and the sealing plug assembly 5 includes a piston column 5.1, a first air guide groove 5.2 is provided on the side surface of one end of the piston column 5.1, a second air guide groove 5.3 is provided on the side surface of the other end of the piston column 5.1, a first wall groove 5.4 which can be communicated with the first air guide groove 5.2 is also provided on the inner wall of the shaft rotating tube 4.1, and a second wall groove 5.5 which can be communicated with the second air guide groove 5.3 is also provided on the inner wall of the shaft rotating tube 4.1;

[0043] Specifically, the piston column 5.1 can play a blocking role in the shaft rotating tube 4.1, and the piston column 5.1 can move in the shaft rotating tube 4.1 under the action of the pressure difference. In actual use, for example, when the limit beam 3.1 is switched from the submerged position to the raised position, the air pump 4.21 inflates toward the connecting tube 4.22, and the airflow pushes the piston column 5.1 toward the first wall groove 5.4. When the first air guide groove 5.2 is aligned and connected with the first wall groove 5.4, the shaft rotating tube 4.1 is in a conducting state, and the airflow enters the cavity 3.2, thereby The water in the cavity 3.2 is emptied, and the limit beam 3.1 is deflected from the submerged position toward the raised position. In this process, when the limit beam 3.1 reaches the raised position, the first wall groove 5.4 is staggered with the first air guide groove 5.2 as the shaft rotating tube 4.1 deflects, and the second air guide groove 5.3 and the second wall groove 5.5 are on the same straight line. The second air guide groove 5.3 and the second wall groove 5.5 are not yet connected to each other. At this time, the shaft rotating tube 4.1 is in a blocked state again, thereby preventing pressure relief in the cavity 3.2 and keeping the limit beam 3.1 stably in the raised position;

[0044] Similarly, when the limiting beam 3.1 is in the lifting position and switches to the submerged position, the air pump 4.21 draws air from the connecting tube 4.22 to form an air pressure difference. Under the air pressure difference, the air pressure pushes the piston rod 5.1 to move toward the second wall groove 5.5. When the second air guide groove 5.3 is aligned and connected with the second wall groove 5.5, the shaft rotating tube 4.1 is in the conducting state, and the air in the cavity 3.2 can be sucked by the air pump 4.21, thereby reducing the pressure in the cavity 3.2 and connecting port 3. 3 can guide the external water flow into the cavity 3.2, and the limiting beam 3.1 deflects from the lifting position toward the submerged position. In this process, when the limiting beam 3.1 reaches the submerged position, the second wall groove 5.5 is staggered with the second air guide groove 5.3 as the shaft rotating tube 4.1 deflects. At this time, the shaft rotating tube 4.1 is in a blocked state, thereby preventing the cavity 3.2 from being depressurized, making it difficult for the water in the cavity 3.2 to be discharged, and keeping the limiting beam 3.1 stably in the submerged position.

[0045] In another embodiment provided by the present invention, an extension strip 5.11 is fixed to the body of the piston column 5.1, the length direction line of the extension strip 5.11 is parallel to the axis line of the piston column 5.1, and the other end of the extension strip 5.11 is movably sleeved with a flat sleeve 5.12, and the extension strip 5.11 can telescopically move in the flat sleeve 5.12, and the end of the flat sleeve 5.12 is fixed to the bottom of the connecting tube 4.22. In actual use, the extension strip 5.11 can reciprocate along the length direction of the flat sleeve 5.12, thereby limiting the axial rotation of the body of the piston column 5.1, and preventing the piston column 5.1 from rotating synchronously with the shaft rotating tube 4.1;

[0046] Furthermore, the tube mouth of the connecting tube 4.22 is inserted into the shaft rotating tube 4.1, and a slide rail groove 4.3 is provided on the inner wall surface of the shaft rotating tube 4.1. A slider 4.4 fixed to the extension strip 5.11 is slidably clamped in the slide rail groove 4.3. A clamping groove 4.5 is provided at the tube mouth end of the connecting tube 4.22. In actual use, when the limiting beam 3.1 is switched from the lifting position to the submerged position, the second wall groove 5.5 is staggered with the second air guide groove 5.3 as the shaft rotating tube 4.1 deflects. At this time, the shaft rotating tube 4.1 is in a blocked state again, and At the same time, the slide groove 4.3 and the clamping groove 4.5 are on the same straight line. As the air pump 4.21 continues to pump air from the connecting tube 4.22, the piston column 5.1 continues to move in the direction of the connecting tube 4.22, so that the extending strip 5.11 drives the slider 4.4 to be clamped with the clamping groove 4.5, that is, one end of the slider 4.4 is clamped with the clamping groove 4.5, and the other end of the slider 4.4 is located in the slide groove 4.3, thereby limiting the rotation in the shaft rotating tube 4.1, which is beneficial to improving the stability of the limiting beam 3.1.

[0047] In another embodiment provided by the present invention, a locking assembly 6 is provided between the auxiliary floating body 2 and the main floating body 1, and the locking assembly 6 includes a locking seat unit 6.1 fixed to the side of the auxiliary floating body 2 and a locking buckle unit 6.2 installed on the limiting assembly 3, and the locking buckle unit 6.2 is locked with the locking seat unit 6.1 when the limiting beam 3.1 is in the submerged position;

[0048] The lock unit 6.1 includes a base block 6.11, the length direction line of the base block 6.11 is parallel to the length direction line of the auxiliary floating body 2, a hook groove structure 6.12 is provided on the side of the base block 6.11, and the hook groove structure 6.12 includes a plug-in groove 6.121, and a sinking groove 6.122 is provided at the bottom of the plug-in groove 6.121, wherein an inclined block 6.123 is provided between the bottom end of the plug-in groove 6.121 and the sinking groove 6.122;

[0049] The locking unit 6.2 includes a clamping column 6.21 that can be clamped with the hook groove structure 6.12, and a plug-in blind hole 6.22 adapted for rotational installation with the clamping column 6.21 is opened on the side of the limiting beam 3.1. A rotating bearing 6.23 is fixed in the plug-in blind hole 6.22, and the rotating bearing 6.23 is fixed to the clamping column 6.21.

[0050] Furthermore, the cylindrical surface of the clamping column 6.21 is a smooth surface, and the axis of the clamping column 6.21 is parallel to the length direction line of the main floating body 1;

[0051] In actual use, before the main floating body 1 and the auxiliary floating body 2 are positioned and spliced, the limiting beam 3.1 on the main floating body 1 is in a raised position, and the hook groove structure 6.12 and the clamping column 6.21 are on the same horizontal plane. Specifically, the plug-in groove 6.121 and the clamping column 6.21 are on the same horizontal plane.

[0052] During the assembly process between the main floating body 1 and the auxiliary floating body 2, when the main floating body 1 and the auxiliary floating body 2 are flush with each other, and the clamping column 6.21 is inserted into the plug-in slot 6.121, it should be particularly noted that during the process of the clamping column 6.21 extending into the plug-in slot 6.121, when the clamping column 6.21 reaches the bottom of the plug-in slot 6.121, the horizontally moving clamping column 6.21 contacts the inclined portion of the inclined surface block 6.123, so that the inclined surface block 6.123 has an upward component force, and then the auxiliary floating body 2 swings on the water surface, thereby playing a buffering role, and the clamping column 6.21 is located at the top of the notch of the sinking tank 6.122;

[0053] After the main floating body 1 and the auxiliary floating body 2 are positioned and assembled, the limiting beam 3.1 is switched from the raised position to the submerged position, so that the clamping column 6.21 moves downward with the limiting beam 3.1, and the clamping column 6.21 falls into the sinking groove 6.122. At this time, the locking assembly 6 is in a locked state, that is, the locking unit 6.2 is locked with the locking seat unit 6.1 when the limiting beam 3.1 is in the submerged position. At this time, the main floating body 1 and the auxiliary floating body 2 are locked after the positioning and assembly is completed, so as to form a complete excavation platform; similarly, when unlocking is required, the limiting beam 3.1 is switched from the submerged position to the raised position, and the main floating body 1 and the auxiliary floating body 2 can be separated.

[0054] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A combined water excavation platform, comprising a main floating body (1) and two auxiliary floating bodies (2) located on both sides of the main floating body (1), characterized in that: The main floating body (1) and each auxiliary floating body (2) are connected by a positioning locking mechanism to form a platform as a whole, and the positioning locking mechanism comprises: A limiting assembly (3), comprising a limiting beam (3.1) having a raised position and a submerged position, wherein the limiting beam (3.1) can intercept and limit the auxiliary floating body (2) in the raised position, so that the end of the auxiliary floating body (2) is flush with the end of the main floating body (1); An axis rotation assembly (4) comprises an axis rotation tube (4.1) rotatably plugged into the end of the main floating body (1), one end of the axis rotation tube (4.1) being fixed to the limiting beam (3.1), and the other end of the axis rotation tube (4.1) being drivingly connected to a driving mechanism (4.2) located inside the main floating body (1), and the axis rotation assembly (4) being capable of controlling the limiting beam (3.1) to switch between a raised position and a submerged position; A traction rope mechanism (7), comprising a winch mechanism (7.1) installed on the main floating body (1), wherein the traction rope (7.2) on the winch mechanism (7.1) is connected to the corresponding auxiliary floating body (2), and the winch mechanism (7.1) applies a traction force to the auxiliary floating body (2) to move toward the main floating body (1) when in a reeled state; The driving mechanism (4.2) comprises an air pump (4.21), an airflow connection end of the air pump (4.21) is fixedly connected to a connection cylinder (4.22), a cylinder mouth of the connection cylinder (4.22) is rotationally connected to the shaft rotating tube (4.1), and when the air pump (4.21) blows air toward the connection cylinder (4.22), the limit beam (3.1) switches from the submerged position to the raised position, and when the air pump (4.21) inhales air toward the connection cylinder (4.22), the limit beam (3.1) switches from the raised position to the submerged position.

2. A combined water excavation platform according to claim 1, characterized in that: A cavity (3.2) is provided inside the beam body of the position-limiting beam (3.1), a connecting port (3.3) is provided at the bottom of the cavity (3.2), and the cavity (3.2) is connected to the shaft rotating tube (4.1).

3. The combined water excavation platform according to claim 2, characterized in that: A sealing plug assembly (5) is arranged inside the shaft rotating tube (4.1), and the sealing plug assembly (5) comprises a piston column (5.1), a first air guide groove (5.2) is arranged on the side surface of one end of the piston column (5.1), a second air guide groove (5.3) is arranged on the side surface of the other end of the piston column (5.1), a first wall groove (5.4) which can be connected to the first air guide groove (5.2) is also arranged on the inner wall of the shaft rotating tube (4.1), and a second wall groove (5.5) which can be connected to the second air guide groove (5.3) is also arranged on the inner wall of the shaft rotating tube (4.1).

4. The combined water excavation platform according to claim 3, characterized in that: An extension strip (5.11) is fixed on the body of the piston column (5.1), and a flat sleeve (5.12) is movably sleeved on the other end of the extension strip (5.11), and the end of the flat sleeve (5.12) is fixed to the bottom of the connecting cylinder (4.22).

5. The combined water excavation platform according to claim 4, characterized in that: A locking assembly (6) is provided between the auxiliary floating body (2) and the main floating body (1), the locking assembly (6) comprising a locking seat unit (6.1) fixed to the side of the auxiliary floating body (2) and a locking buckle unit (6.2) installed on the limiting assembly (3), the locking buckle unit (6.2) being locked with the locking seat unit (6.1) when the limiting beam (3.1) is in a submerged position.

6. The combined water excavation platform according to claim 5, characterized in that: The lock seat unit (6.1) comprises a base block (6.11), a hook groove structure (6.12) is provided on the side of the base block (6.11), the hook groove structure (6.12) comprises a plug-in groove (6.121), and a sinking groove (6.122) is provided at the bottom of the plug-in groove (6.121).

7. The combined water excavation platform according to claim 6, characterized in that: A slope block (6.123) is provided between the bottom end of the plug-in slot (6.121) and the sinking slot (6.122).

8. The combined water excavation platform according to claim 7, characterized in that: The locking unit (6.2) comprises a clamping column (6.21) that can be clamped with the hook groove structure (6.12), and a blind plugging opening (6.22) adapted to be rotatably mounted with the clamping column (6.21) is provided on the side of the limiting beam (3.1).

9. The combined water excavation platform according to claim 8, characterized in that: The cylindrical surface of the clamping column (6.21) is a smooth surface, and the axis line of the clamping column (6.21) is parallel to the length direction line of the main floating body (1).

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