Bidirectional sludge feeding pneumatic pump

Abstract

The bidirectional sludge feeding pneumatic pump comprises a hollow pump body, sludge feeding channels formed in the side walls of the pump body and an opening and closing mechanism capable of opening or closing the sludge feeding channels, the sludge feeding channels comprise the first sludge feeding channel and the second sludge feeding channel, and the first sludge feeding channel and the second sludge feeding channel are located on the two corresponding side walls of the pump body respectively; the sludge inlet channels have a working state and a non-working state, and when one sludge inlet channel is in the working state, the other sludge inlet channel is inevitably in the non-working state. The two-way sludge feeding pneumatic pump can achieve two-way dredging continuous operation in actual dredging and dredging construction, the pneumatic pump can still conduct normal dredging operation in the reverse traction process of the pneumatic pump, the actual effective working time of the pneumatic pump is greatly prolonged, and the actual working efficiency of the pneumatic pump is improved.

Description

Technical Field

[0001] The present invention relates to dredging and desilting equipment, and in particular to a pneumatic desilting pump with a bidirectional mud inlet. Background Art

[0002] As we all know, pneumatic dredging pumps are widely used in underwater environmental dredging projects. They use compressed air as a power source to push out mud that has entered the pump body due to water pressure differentials. However, current pneumatic pumps cannot perform continuous dredging operations during actual dredging operations, resulting in low time utilization and significantly reducing their actual operating efficiency.

[0003] Current pneumatic pumps are equipped with a mud inlet at the front end, which collects and transports dredged mud into the pump body. When performing dredging operations, the pneumatic pump employs a dredging process that uses anchor traction and strip-type zoning. The dredging area is first divided into several strips based on the width of the pneumatic pump's mud inlet. The pneumatic pump is then lowered into the mud layer at the starting point of the first strip using a hanger or cantilever. The pneumatic pump is then pulled forward by an anchor chain. The mud at the front of the pneumatic pump is drawn and pushed through the mud inlet into the pump body by the pump's suction and push action. When the pneumatic pump reaches the end of the first strip, it is pulled out of the mud surface and then towed in the opposite direction to the starting point. The pump is then moved sideways to an adjacent strip, where it is lowered into the mud and begins dredging the second strip starting from the starting point of the adjacent strip. During this entire reverse traction process, the pneumatic pump is inactive and cannot perform dredging operations. After the silt in each dredging belt is cleared to the end point, it takes dozens of minutes to reversely pull the pneumatic pump to the starting position before the next dredging operation can begin. The time spent on this reverse pulling of the pneumatic pump accounts for as much as 30%-40% of the entire pneumatic pump dredging working time, which makes the time the pneumatic pump is actually used for actual dredging per unit working time low, greatly reducing the effective working time and actual utilization efficiency of the pneumatic pump, and increasing the construction period and operating cost of pneumatic pump dredging. For this reason, a dredging equipment is needed that can extend the actual effective working time of the existing pneumatic pump and improve the working efficiency of the existing pneumatic pump. Summary of the Invention

[0004] The present invention aims to address the above-mentioned problems and provide a bidirectional pneumatic mud pump and a dredging method thereof. The bidirectional pneumatic mud pump has a simple structure and is easy to manufacture. It can achieve bidirectional continuous dredging during dredging operations. During the reverse pulling process, the pneumatic pump can still perform normal dredging operations, greatly increasing the actual effective working time of the pneumatic pump and improving the actual working efficiency of the pneumatic pump.

[0005] The objective of the present invention is achieved through the following technical solutions: a bidirectional mud-feeding pneumatic pump, comprising a hollow pump body, a mud-feeding channel opened on the side wall of the pump body, and an opening and closing mechanism that can open or close the mud-feeding channel, characterized in that: the mud-feeding channel comprises a first mud-feeding channel and a second mud-feeding channel, the first mud-feeding channel and the second mud-feeding channel are respectively located on the corresponding two side walls of the pump body; the mud-feeding channel has two states, working state and non-working state, and when one of the mud-feeding channels is in the working state, the other mud-feeding channel must be in the non-working state.

[0006] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that it is in a working state when the mud-feeding channel faces the mud that needs to be dredged, and is in a non-working state when the mud-feeding channel faces away from the mud that needs to be dredged.

[0007] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that, in a non-operating state, the mud-feeding channel is always kept normally closed under the action of the opening and closing mechanism.

[0008] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that the opening and closing mechanism is one of an electric valve, a pneumatic valve or a hydraulic valve.

[0009] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that the opening and closing mechanism includes a one-way valve and an actuator.

[0010] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that the one-way valve remains normally closed under the limiting action of the actuator.

[0011] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that the one-way valve opens or closes the mud-feeding channel under the push-pull action of the actuator.

[0012] Furthermore, the bidirectional mud-feeding pneumatic pump is characterized in that the one-way valve is a flap valve or a ball valve.

[0013] Furthermore, the dredging method of the bidirectional mud-feeding pneumatic pump is characterized in that: within a given dredging operation range, the dredging area is divided into several strip dredging belts according to the suction width of the pneumatic pump; during dredging, the pneumatic pump is first lowered to the starting position of the first dredging belt, and the dredging sludge is sucked straightly from the starting position to the end position in the first dredging belt; when the pneumatic pump is advanced to the end position of the first dredging belt, the pneumatic pump is laterally translated into the adjacent second dredging belt, and the corresponding position of the second dredging belt adjacent to the end position of the first dredging belt becomes the dredging starting position of the second dredging belt, and the pneumatic pump starts to advance dredging in the opposite direction in the second dredging belt; after the sludge in the second dredging belt is cleared, the dredging is switched to the adjacent third dredging belt according to the same method as above, and so on until all the sludge in the dredging area is cleared.

[0014] Furthermore, the dredging method of the bidirectional mud-feeding pneumatic pump is characterized in that: when the pneumatic pump is moving forward and straight in the dredging zone to dredge, the first mud-feeding channel facing the dredging direction is in an operating state, and the second mud-feeding channel facing away from the dredging direction is in a non-operating state, and the second mud-feeding channel is always in a closed state in the non-operating state. The working process of the first mud-feeding channel in the operating state is as follows: when the pump body moves straight forward in the dredging zone, the first mud-feeding channel is opened, and the mud in the forward direction of the pneumatic pump is sucked into the pump body through the mud inlet and the first mud-feeding channel; after the mud fills the pump body, the first mud-feeding channel is closed, and the air compressor injects high-pressure air into the pump body through the vent pipe to push the mud out of the pump body through the mud discharge pipe; after the mud in the pump body is emptied, the high-pressure air in the pump body is discharged from the vent pipe, and then the first mud-feeding channel is opened again, and the mud at the front end of the pump body re-enters the pump body to start the next mud-feeding and discharging process. When the silt in one silt clearing zone is cleared, the pump body moves laterally to another adjacent silt clearing zone to start silting. The second silt inlet channel begins to face the silt clearing direction and is in the working state to perform the above-mentioned working process; the first silt inlet channel begins to face away from the silt clearing direction and is in the non-working state and remains in a normally closed state.

[0015] The bidirectional mud-feeding pneumatic pump of the present invention can realize bidirectional continuous dredging operation in actual dredging and desilting projects. During the process of reverse pulling the pneumatic pump, the pneumatic pump can still perform normal dredging operations, which greatly increases the actual effective working time of the pneumatic pump, improves the actual working efficiency of the pneumatic pump, reduces the actual cost of dredging by the pneumatic pump, and shortens the dredging construction period of the pneumatic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural stereogram of embodiment 1 of the present invention.

[0017] Figure 2 It is a partial sectional right view of embodiment 1 of the present invention.

[0018] Figure 3 It is a front view of embodiment 1 of the present invention.

[0019] Figure 4 It is a top view of embodiment 1 of the present invention.

[0020] Figure 5 It is a structural stereogram of embodiment 2 of the present invention.

[0021] Figure 6 It is a partial sectional right view of embodiment 2 of the present invention.

[0022] Figure 7 It is a front view of embodiment 2 of the present invention.

[0023] Figure 8 It is a top view of embodiment 2 of the present invention.

[0024] Figure 9 It is a structural stereogram of Example 3 of the present invention.

[0025] Figure 10 It is a right view of embodiment 3 of the present invention.

[0026] Figure 11 It is a front view of embodiment 3 of the present invention.

[0027] Figure 12 It is a top view of embodiment 3 of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Example 1, see attached Figure 1-4 The two-way mud-feeding pneumatic pump includes a hollow pump body 1, mud inlet channels 2.1 and 2.2 opened on the front and rear side walls of the pump body 1, and a mud inlet port 6 extended from the mud inlet channels. A flap-type one-way valve 3.1 is provided on the mud inlet channels 2.1 and 2.2, and a cylinder 3.2 is also provided on the front and rear side walls of the pump body 1. When the piston rod 3.2.1 in the cylinder 3.2 is extended, the cover plate of the one-way valve 3.1 can be pressed against the sealing surface of the mud inlet channel 2.1 or 2.2, thereby closing the mud inlet channel 2.1 or 2.2; a vent pipe 4 and a mud discharge pipe 5 extend from the top of the pump body 1. The mud inlet channel 2.1 or 2.2 has two states: working state and non-working state. When one of the mud inlet channels is in the non-working state, the piston rod 3.2.1 always presses the cover plate of the one-way valve 3.1 on the mud inlet channel against the sealing surface of the mud inlet channel, so that the mud inlet channel remains normally closed; when one of the mud inlet channels is in the working state, the corresponding piston rod 3.2.1 retracts into the cylinder 3.2; when one of the mud inlet channels is in the working state, the other mud inlet channel must be in the non-working state.

[0030] When performing dredging operations, within a given dredging operation range, the dredging area is divided into several strip dredging belts according to the width of the mud inlet 6 of the bidirectional mud inlet pneumatic pump; during dredging, the pneumatic pump is first lowered to the starting position of the first dredging belt, and the dredging sludge is sucked straightly from the starting position to the end position in the first dredging belt; when the pneumatic pump is advanced to the end position of the first dredging belt, the pneumatic pump is laterally translated to the adjacent second dredging belt, and the corresponding position of the second dredging belt adjacent to the end position of the first dredging belt becomes the dredging starting position of the second dredging belt, and the pneumatic pump starts to advance the dredging in the opposite direction in the second dredging belt; after the silt in the second dredging belt is cleared, the dredging is switched to the third dredging belt according to the same method as above, and so on until all the silt in the dredging area is cleared.

[0031] When the bidirectional mud-feeding pneumatic pump is pushed forward and straight in the dredging belt to dredge, the first mud-feeding channel 2.1 facing the dredging direction is first in the working state, and the corresponding piston rod 3.2.1 is retracted into the cylinder 3.2; the second mud-feeding channel 2.2 facing away from the dredging direction is in the non-working state, and the cover plate of the one-way valve 3.1 in the second mud-feeding channel 2.2 is always pressed against the sealing surface of the second mud-feeding channel 2.2 under the push of the piston rod 3.2.1, so that the second mud-feeding channel 2.2 is always in the closed state. The working process of the first mud inlet channel 2.1 in the working state is as follows: when the pump body 1 moves straight forward in the dredging belt, the cover of the one-way valve 3.1 on the first mud inlet channel 2.1 opens under the action of the pressure difference between the inside and outside of the pump body 1, and the first mud inlet channel 2.1 opens, and the silt in the forward direction of the pneumatic pump is sucked into the pump body 1 through the mud inlet port 6 and the first mud inlet channel 2.1; after the silt fills the pump body 1, the cover of the one-way valve 3.1 on the first mud inlet channel 2.1 closes the first mud inlet channel 2.1 under the action of its own gravity, and the air compressor injects high-pressure air into the pump body 1 through the vent pipe 4 to push the silt out of the pump body 1 through the mud discharge pipe 5; after the silt in the pump body 1 is emptied, the high-pressure air in the pump body 1 is discharged from the vent pipe 4, and at this time, the cover of the one-way valve 3.1 on the first mud inlet channel 2.1 opens again under the action of the pressure difference between the inside and outside of the pump body 1, and the silt at the front end of the pump body 1 enters the pump body 1 again to start the next mud inlet and discharge process. When the silt in one silt clearing zone is cleared, the pump body 1 moves laterally to another adjacent silt clearing zone to start silting. The second silt inlet channel 2.2 begins to face the silt clearing direction and is in the working state to perform the working process of the above working state; the first silt inlet channel 2.1 begins to face away from the silt clearing direction and is in the non-working state and remains in a normally closed state.

[0032] Example 2, see attached Figure 5-8 , two-way mud inlet pneumatic pump, the one-way valve 3.1 is a ball valve, and the sealing ball in the one-way valve 3.1 can seal the sealing surface of the corresponding mud inlet channel under the extrusion of the piston rod 3.2.1. The rest of the structure and dredging work process refer to Example 1.

[0033] Example 3, see attached Figure 9-12 The bidirectional mud-feed pneumatic pump comprises a hollow pump body 1, mud-feed channels 2.1 and 2.2 defined in the front and rear walls of the pump body 1, and a mud inlet 6 extending from the channels. Electric-controlled valves 3 are provided on each channel; a vent pipe 4 and a mud-discharge pipe 5 extend from the top of the pump body 1. Mud-feed channels 2.1 and 2.2 each have operating and non-operating states. When one of the channels is non-operating, the electric-controlled valve 3 remains closed, keeping that channel closed. When one channel is operating, the other is also non-operating.

[0034] When the bidirectional mud-feeding pneumatic pump is moving forward and straight in the dredging zone to dredge, the first mud-feeding channel 2.1 facing the dredging direction is first in the working state, and the second mud-feeding channel 2.2 facing the opposite direction of the dredging direction is in the non-working state; the electric control valve 3 on the second mud-feeding channel 2.2 in the non-working state is always closed, so that the second mud-feeding channel 2.2 is always in the closed state. The working process of the first mud inlet channel 2.1 in the working state is as follows: when the pump body 1 moves straight forward in the dredging belt, the electric control valve 3 on the first mud inlet channel 2.1 is opened, and the first mud inlet channel 2.1 is opened. The sludge in the forward direction of the pneumatic pump is sucked into the pump body 1 through the mud inlet 6 and the first mud inlet channel 2.1; after the sludge fills the pump body 1, the electric control valve 3 on the first mud inlet channel 2.1 is closed, and the air compressor injects high-pressure air into the pump body 1 through the vent pipe 4 to push the sludge out of the pump body 1 through the mud discharge pipe 5; after the sludge in the pump body 1 is emptied, the high-pressure air in the pump body 1 is discharged from the vent pipe 4. At this time, the electric control valve 3 on the first mud inlet channel 2.1 is opened again, and the sludge at the front end of the pump body 1 enters the pump body 1 again to start the next mud inlet and discharge process. When the silt in one silt clearing zone is cleared, the pump body 1 moves laterally to another adjacent silt clearing zone to start silting. The second silt inlet channel 2.2 begins to face the silt clearing direction and is in the working state to perform the working process of the above working state; the first silt inlet channel 2.1 begins to face away from the silt clearing direction and is in the non-working state and remains in a normally closed state.

[0035] Although the present invention has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various changes can be made without departing from the spirit and scope of the invention.

Claims

1. A bidirectional mud-feeding pneumatic pump, comprising a hollow pump body (1), a mud-feeding channel (2) provided on a side wall of the pump body, and an opening and closing mechanism (3) capable of opening or closing the mud-feeding channel (2), characterized in that: The mud inlet channel (2) comprises a first mud inlet channel (2.1) and a second mud inlet channel (2.2), the first mud inlet channel (2.1) and the second mud inlet channel (2.2) being respectively located on two corresponding side walls of the pump body (1); the mud inlet channel (2) has two states: an operating state and a non-operating state; when one of the mud inlet channels is in an operating state, the other mud inlet channel must be in a non-operating state.

2. The bidirectional mud-feeding pneumatic pump according to claim 1, characterized in that: When the mud inlet channel (2) faces the silt that needs to be dredged, it is in a working state, and when the mud inlet channel (2) faces away from the silt that needs to be dredged, it is in a non-working state.

3. The bidirectional mud-feeding pneumatic pump according to claim 1, characterized in that: In the non-working state, the mud inlet channel (2) always remains normally closed under the action of the opening and closing mechanism (3).

4. The bidirectional mud-feeding pneumatic pump according to claim 1, characterized in that: The opening and closing mechanism (3) is an electric valve, a pneumatic valve or a hydraulic valve.

5. The bidirectional mud-feeding pneumatic pump according to claim 1, characterized in that: The opening and closing mechanism (3) comprises a one-way valve (3.1) and an actuator (3.2).

6. The bidirectional mud-feeding pneumatic pump according to claim 5, characterized in that: The one-way valve (3.1) remains normally closed under the limiting action of the actuator (3.2).

7. The bidirectional mud-feeding pneumatic pump according to claim 5, characterized in that: The one-way valve (3.1) opens or closes the mud inlet channel (2) under the push and pull action of the actuator (3.2).

8. The bidirectional mud-feeding pneumatic pump according to claim 5, characterized in that: The one-way valve (3.1) is a flap valve or a ball valve.

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