Multi-pump spoil removal structure for double-wheel trench cutter, and working method therefor

Abstract

Disclosed are a multi-pump spoil removal structure for a double-wheel trench cutter, and a working method therefor. The structure comprises a travel assembly, a support assembly being disposed on the movement assembly, a milling cutter frame that moves up and down being disposed on the support assembly, and a slurry pump set being disposed on the milling cutter frame. The slurry pump set consists of two or more slurry pumps connected in series by means of a first slurry pipe, an inlet of the slurry pump at a frontmost end sucks up milling spoil, and an outlet of the slurry pump at a rearmost end is connected to a second slurry pipe. The slurry pumps are driven by means of a hydraulic motor, and the hydraulic motor is connected to a row of hydraulic pipes. A hydraulic pipe guide wheel and a slurry pipe guide wheel are disposed at two sides of an upper end of the support assembly, respectively, and a hydraulic reel and a slurry reel are disposed at the two sides of the upper end of the support assembly, respectively. The multi-pump spoil removal structure for the double-wheel trench cutter and the working method therefor of the present invention are suitable for use in a double-wheel trench cutter, and can solve problems such as driving pressure of the slurry pumps being reduced due to pressure loss of a hydraulic pipe when the double-wheel trench cutter is used for superdeep diaphragm wall construction, and a single pump performing incomplete spoil removal or being unable to perform spoil removal.

Description

Double-wheel trenching machine multi-pump discharge structure and working method thereof TECHNICAL FIELD

[0001] The present application relates to a double-wheel trenching machine multi-pump discharge structure and working method thereof, belonging to the technical field of engineering machinery. BACKGROUND

[0002] The double-wheel trenching machine is a diaphragm wall construction equipment, and the main construction principle is that a milling device mills the stratum, the milled muck is pumped to the ground fixed muck collecting position through a slurry pump and a slurry pipe group, the slurry pipe group is wound on a main machine reel, and the slurry pipe group is lifted and lowered together with the milling device. The construction depth of the double-wheel trenching machine in the industry is generally within 100 m, the muck is discharged by using a 450 m3 / h muck slurry pump, and the lift meets the 150 m construction requirement. With the deepening of the construction depth (more than 150 m), the slurry pipe is long, and the slurry pipe with a length of more than 150 m is wound on the slurry reel to generate a large lift. Since the slurry pump is driven by a motor, the construction depth is deep, the hydraulic pipe of the driving motor is long, the pressure loss is large, the driving pressure becomes small, the output rotating speed of the slurry pump is reduced, the discharge capacity is affected, the muck is not completely discharged, or the muck cannot be discharged to the ground.

[0003] SUMMARY

[0004] The present application solves the technical problems that the prior art has defects, provides a double-wheel trenching machine multi-pump discharge structure and working method thereof, and can solve the problems of the double-wheel trenching machine super-deep diaphragm wall construction, the driving pressure of the slurry pump becoming small due to the pressure loss of the hydraulic pipe, and the single-pump discharge being incomplete or unable to discharge muck.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] The application discloses a multiple-pump sludge discharging structure of a double-wheel trenching machine, which comprises a walking assembly, a support assembly arranged on the walking assembly, a trenching cutter holder arranged on the support assembly and moving up and down, a slurry pump set arranged on the trenching cutter holder, wherein the slurry pump set is composed of two or more slurry pumps connected in series through a first slurry pipe, the inlet of the frontmost slurry pump pumps the slurry, the outlet of the last slurry pump is connected with a second slurry pipe, the slurry pump is driven by a hydraulic motor, the hydraulic motor is connected with a hydraulic pipe row, hydraulic pipe guide wheels and slurry pipe guide wheels are arranged on the two sides of the upper end of the support assembly, hydraulic reels and slurry reels are arranged on the two sides of the upper end of the support assembly, the hydraulic pipe row is wound on the hydraulic reel by passing through the hydraulic pipe guide wheels, and the second slurry pipe is wound on the slurry reel by passing through the slurry pipe guide wheels.

[0007] The slurry pump set is composed of a first slurry pump and a second slurry pump, the first slurry pump and the second slurry pump are respectively driven by a first hydraulic motor and a second hydraulic motor, the first hydraulic motor and the second hydraulic motor are connected with the hydraulic pipe row, the outlet of the first slurry pump is connected with the inlet of the second slurry pump through the first slurry pipe, and the outlet of the second slurry pump is connected with the second slurry pipe.

[0008] The hydraulic reel and the slurry reel are coaxially driven, and synchronous lifting and lowering can be realized during the winding and unwinding of the hydraulic pipe row and the second slurry pipe, so that control is facilitated.

[0009] The first slurry pipe and the second slurry pipe are respectively composed of a plurality of slurry pipe units connected in a head-tail mode.

[0010] The second slurry pump is located above the first slurry pump.

[0011] The slurry pump set is composed of three slurry pumps, the three slurry pumps are connected through a first slurry pipe, the inlet of the frontmost slurry pump pumps the slurry, the outlet of the last slurry pump is connected with a second slurry pipe for discharging the slurry, the three slurry pumps are respectively driven by three hydraulic motors, and the three hydraulic motors are respectively connected with the hydraulic pipe row.

[0012] Three mud pumps are arranged in a straight line in a vertical direction, the front end mud pump is located at the lowermost position, and the rear end mud pump is located at the uppermost position.

[0013] A working method of a double-wheel trenching machine multi-pump residue discharging structure, comprising the following steps: obtaining the construction depth of the double-wheel trenching machine, judging whether the construction depth of the double-wheel trenching machine exceeds 1 m, if not, driving the first hydraulic motor or the second hydraulic motor through the hydraulic pipe row to make the first mud pump or the second mud pump work, if yes, driving the first hydraulic motor and the second hydraulic motor through the hydraulic pipe row to make the first mud pump and the second mud pump work.

[0014] The double-wheel trenching machine multi-pump residue discharging structure and the working method thereof provided by the application have the following beneficial effects: the mud pump group is arranged on the cutter holder, the mud pump group is composed of two or more mud pumps connected in series through the first mud pipe, the inlet pump of the front end mud pump sucks the milled residue soil, the outlet pump of the rear end mud pump is connected with the second mud pipe, the multiple pumps are connected in series and controlled in sections, the number of mud pumps in operation can be selected according to the construction depth, different mud pumps can be controlled at different depths, the problems of incomplete residue discharging or inability to discharge residue of the single pump due to the decrease of driving pressure caused by the pressure loss of the hydraulic pipeline in the deep underground continuous wall construction of the double-wheel trenching machine can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a front structural schematic view of the double-wheel trenching machine multi-pump residue discharging structure.

[0016] Fig. 2 is a side structural schematic view of the double-wheel trenching machine multi-pump residue discharging structure.

[0017] In the drawings, the reference signs are as follows: 1-cutter holder; 2-first mud pump; 3-mud reel; 4-first mud pipe; 5-second mud pump; 6-hydraulic pipe row; 7-first hydraulic motor; 8-second mud pipe; 9-second hydraulic motor; 10-hydraulic pipe guide wheel; 11-mud pipe guide wheel; 12-hydraulic reel; 13-traveling assembly; 14-bracket assembly. DETAILED DESCRIPTION

[0018] The application will be further described below in combination with the drawings, and the following examples are only used to more clearly illustrate the technical solutions of the application, and cannot be used to limit the protection scope of the application.

[0019] Specific embodiment 1

[0020] As shown in Figures 1 and 2, the application discloses a double-wheel trencher multi-pump residue discharge structure, considering many factors such as large residue density of super-deep and super-hard stratum construction, large pipeline pressure loss and lift, and limited suction capacity of the slurry pump, improvements are made on the existing double-wheel trencher multi-pump residue discharge structure. The double-wheel trencher multi-pump residue discharge structure comprises a walking assembly 13, a support assembly 14 is arranged on the walking assembly 13, a milling cutter holder 1 capable of moving up and down is arranged on the support assembly 14, and this part is the main structure of the existing double-wheel trencher multi-pump residue discharge structure.

[0021] The improvement point of the application is that the original single slurry pump on the milling cutter holder 1 is improved into a slurry pump group, and the slurry pump group is composed of two or more slurry pumps connected in series through a first slurry pipe 4. The frontmost slurry pump sucks the milled residue soil, and the last slurry pump is connected with a second slurry pipe 8. The slurry pump is driven by a hydraulic motor. The number of the slurry pumps is not specifically limited in the application, and can be selected according to the construction depth of the double-wheel trencher. In the embodiment, the number of the slurry pumps is two, which can meet the condition that the maximum construction depth of the double-wheel trencher exceeds 150 meters.

[0022] Specifically, the slurry pump group is composed of a first slurry pump 2 and a second slurry pump 5, the first slurry pump 2 and the second slurry pump 5 are respectively driven by a first hydraulic motor 7 and a second hydraulic motor 9, the first hydraulic motor 7 and the second hydraulic motor 9 are connected with a hydraulic pipe row 6, and power is provided through the hydraulic pipe row 6.

[0023] The second slurry pump 5 is located above the first slurry pump 2. The first slurry pipe 4 is connected between the outlet of the first slurry pump 2 and the inlet of the second slurry pump 5, so that the first slurry pump 2 and the second slurry pump 5 are connected in series. The first slurry pump 2 and the second slurry pump 5 are used in cooperation to carry and discharge residue, which can overcome the condition that the driving pressure becomes small due to the large pressure loss caused by the long hydraulic pipe, so that the slurry pump has sufficient power,

[0024] The frontmost first slurry pump 2 sucks the milled residue soil, and the last second slurry pump 5 is connected with the second slurry pipe 8. In the application, the first slurry pipe 4 and the second slurry pipe 8 are respectively composed of a plurality of slurry pipe units connected in series. The first hydraulic motor 7 and the second hydraulic motor 9 are provided with power through the hydraulic pipe row 6, the first hydraulic motor 7 and the second hydraulic motor 9 respectively drive the first slurry pump 2 and the second slurry pump 5 to rotate at high speed, and the milled residue soil is sucked. The milled residue soil is sucked through the second slurry pipe 8 by the high-speed rotation of the first slurry pump 2 and the second slurry pump 5.

[0025] The hydraulic pipe guide wheel 10 and the mud pipe guide wheel 11 are arranged on both sides of the upper end of the support assembly 14, and are used to support the hydraulic pipe row 6 and the second mud pipe 8, respectively. The hydraulic reel 12 and the mud reel 3 are arranged on both sides of the upper end of the support assembly 14, and are used to wind the hydraulic pipe row 6 and the second mud pipe 8, respectively. The second mud pipe 8 has more pipe joints, and the hydraulic pipe row 6 is relatively long. The hydraulic pipe row 6 is wound on the hydraulic reel 12 after passing through the hydraulic pipe guide wheel 10, and the hydraulic pipe row 6 is wound by the hydraulic reel 12. The second mud pipe 8 is wound on the mud reel 3 after passing through the mud pipe guide wheel 11, and the second mud pipe 8 is wound by the mud reel 3. In addition, the hydraulic reel 12 and the mud reel 3 are coaxially driven, and can be synchronously raised and lowered during the winding and unwinding of the hydraulic pipe row 6 and the second mud pipe 8, which is convenient for control.

[0026] Embodiment 2

[0027] The embodiment is the same as embodiment 1, and the difference is that the mud pump group is composed of three mud pumps, the three mud pumps are connected through the first mud pipe, the frontmost mud pump inlet sucks the sludge, and the rearmost mud pump outlet is connected to the second mud pipe for discharging sludge. The three mud pumps are driven by three hydraulic motors, and the three hydraulic motors are connected with the hydraulic pipe row to provide power. In actual use, one mud pump, two mud pumps or three mud pumps can be selected according to the construction depth of the double-wheel trencher to work. Specifically, when the construction depth is small, one mud pump is selected to work, when the construction depth is large, two mud pumps are selected to work, and when the construction depth is very large, three mud pumps are selected to work. The three mud pumps are arranged in a straight line in the vertical direction, the frontmost mud pump is located at the lowermost position, and the rearmost mud pump is located at the uppermost position.

[0028] Embodiment 3

[0029] The working method of the double-wheel trenching machine multi-pump sludge discharge structure comprises the following steps: obtaining the construction depth of the double-wheel trenching machine, determining whether the construction depth of the double-wheel trenching machine exceeds 150 meters, if not, driving the first hydraulic motor 7 or the second hydraulic motor 9 through the hydraulic pipe row 6, so that the first mud pump 2 or the second mud pump 5 works, and the sludge is pumped through the first mud pump 2 or the second mud pump 5. At this time, since the construction depth of the double-wheel trenching machine is not very large, the hydraulic pipe driving the motor causes small pressure loss, so the working method of the single pump can also normally carry out the sludge pumping process under this condition. If the construction depth of the double-wheel trenching machine exceeds 150 meters, at this time, since the construction depth of the double-wheel trenching machine is large, the hydraulic pipe driving the motor causes large pressure loss, so the working method of the multi-pump cooperation is adopted under this condition, specifically, the first hydraulic motor 7 and the second hydraulic motor 9 are driven at the same time through the hydraulic pipe row 6, so that the first mud pump 2 and the second mud pump 5 work. The sludge is sucked into the inlet of the second mud pump 5 at the lower end of the mud pump group, and then passes through the first mud pipe 4, the second mud pump 5 and the second mud pipe 8 in turn. Through the high-speed rotation of the mud pump group, the pumped sludge is discharged to the ground through the second mud pipe 8 to the ground sludge collection place.

[0030] The above-mentioned multi-pump series connection and segmented control can select the number of mud pumps according to the construction depth, satisfy different mud pump control at different depths, and solve the problems of double-wheel trenching machine super-deep underground continuous wall construction, sludge discharge not thorough or impossible due to small driving pressure caused by hydraulic pipe pressure loss of mud pump, and the like.

[0031] The above-mentioned multi-pump series connection and segmented control can select the number of mud pumps according to the construction depth, satisfy different mud pump control at different depths, and solve the problems of double-wheel trenching machine super-deep underground continuous wall construction, sludge discharge not thorough or impossible due to small driving pressure caused by hydraulic pipe pressure loss of mud pump, and the like. The above-mentioned multi-pump series connection and segmented control can select the number of mud pumps according to the construction depth, satisfy different mud pump control at different depths, and solve the problems of double-wheel trenching machine super-deep underground continuous wall construction, sludge discharge not thorough or impossible due to small driving pressure caused by hydraulic pipe pressure loss of mud pump, and the like.

Claims

1. A double-wheel trencher multi-pump discharge structure, characterized by: The walking assembly (13) is provided with a support assembly (14), the milling cutter holder (1) is movably arranged on the support assembly (14), and the mud pump group is composed of two or more mud pumps connected in series through the first mud pipe (4).

2. The dual wheel trencher multiple pump discharge structure of claim 1, wherein: The mud pump group is composed of the first mud pump (2) and the second mud pump (5), the first mud pump (2) and the second mud pump (5) are respectively driven by the first hydraulic motor (7) and the second hydraulic motor (9), the first hydraulic motor (7) and the second hydraulic motor (9) are connected with the hydraulic pipe row (6), the first mud pipe (4) is connected between the outlet of the first mud pump (2) and the inlet of the second mud pump (5), and the second mud pipe (8) is connected with the outlet of the second mud pump (5).

3. The dual wheel trencher multiple pump discharge structure of claim 2, wherein: The hydraulic reel (12) and the mud reel (3) are coaxially driven.

4. The dual wheel trencher multiple pump discharge structure of claim 2, wherein: The first mud pipe (4) and the second mud pipe (8) are respectively composed of a plurality of mud pipe units connected in series.

5. The dual wheel trencher multiple pump discharge structure of claim 2 wherein: The second mud pump (5) is located above the first mud pump (2).

6. The dual wheel trencher multiple pump discharge structure of claim 1 wherein: The mud pump group is composed of three mud pumps, the three mud pumps are connected by the first mud pipe, the inlet of the frontmost mud pump sucks the slag, the outlet of the rearmost mud pump is connected with the second mud pipe to discharge the slag, the three mud pumps are respectively driven by three hydraulic motors, and the three hydraulic motors are respectively connected with the hydraulic pipe row.

7. The dual wheel trencher multiple pump discharge structure of claim 6 wherein: The three mud pumps are arranged in a straight line in the vertical direction, the frontmost mud pump is located at the lowermost position, and the rearmost mud pump is located at the uppermost position.

8. A method of operating a multiple pump discharge of a dual wheel trencher as set forth in any one of claims 2 through 5, wherein: The following steps are included: The construction depth of the double-wheel trencher is obtained, it is judged whether the construction depth of the double-wheel trencher exceeds 150 meters, if not, the first hydraulic motor (7) or the second hydraulic motor (9) is driven through the hydraulic pipe row (6) to make the first mud pump (2) or the second mud pump (5) work, and if it exceeds 150 meters, the first hydraulic motor (7) and the second hydraulic motor (9) are simultaneously driven through the hydraulic pipe row (6) to make the first mud pump (2) and the second mud pump (5) work.

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