CN116066135A - Continuous slag discharging system and open caisson tunneling machine - Google Patents

Abstract

The invention relates to a continuous slag discharging system and an open caisson tunneling machine, wherein the continuous slag discharging system comprises a slag extracting pipeline, one end of the slag extracting pipeline is provided with a suction nozzle, the suction nozzle is arranged in the open caisson along with the slag extracting pipeline, and the suction nozzle is positioned close to slag soil or is inserted into the slag soil; the slag pumping pipeline is provided with a negative pressure fan for providing suction force for the suction nozzle and a separating cylinder for separating the slag soil and air pumped into the slag pumping pipeline, the separating cylinder is connected with the slurry preparation tank so as to convey the slag soil obtained by separation into the slurry preparation tank and mix the slurry preparation tank with water to form slurry, and the slurry preparation tank is connected with the slag discharging pipeline so as to discharge the slurry in the slurry preparation tank. The invention solves the technical problem that continuous slag discharge can not be realized in the sinking well tunneling process.

Description

Continuous slag discharging system and open caisson tunneling machine

Technical Field

The invention relates to the technical field of open caisson construction, in particular to a continuous slag discharging system and an open caisson tunneling machine.

Background

The slag discharging system of the open caisson tunneling machine is a key system of the tunneling machine, the existing open caisson tunneling machine mainly adopts two slag discharging modes, one slag discharging mode adopts a slag grab bucket, and the other slag discharging mode adopts a muddy water circulating system. The slag is discharged by the slag grab, and the slag discharge operation and the tunneling operation cannot be performed simultaneously because of the conflict between the slag grab and the cutting head in the process of excavating the slag, so that continuous slag discharge cannot be realized, and the working efficiency is low; in addition, along with the increase of excavation degree of depth, the grab bucket is in the increase of operation degree of difficulty, appears the sediment easily and fights dissatisfaction, dregs drop scheduling problem, also easily produces the raise dust when influencing slag discharging efficiency, causes operational environment poor, and on dregs transportation link, grab bucket is fight with the sediment and is shifted to dregs car on also can produce a large amount of dust, influences operational environment. By adopting a deslagging mode of a muddy water circulating system, enough slurry is required to be kept in an excavated well, and for sandy soil strata with larger permeability coefficient, water in the slurry can infiltrate into the strata in a large amount, so that water resource waste is caused, and meanwhile, the stability of the strata is reduced and collapse is easy to occur because of water infiltration; in addition, the mud water circulation slag discharging system is complex in structure, the required equipment power is high, the slurry inlet pipe and the slurry outlet pipe are required to be continuously prolonged in the continuous tunneling process, the workload is high, the construction difficulty is high, and the economical efficiency is poor.

Aiming at the problem that continuous slag discharge cannot be realized in the sinking well tunneling process, no effective solution is provided at present.

Therefore, the inventor provides a continuous slag discharging system and a sunk well heading machine by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.

Disclosure of Invention

The invention aims to provide a continuous slag discharging system and an open caisson tunneling machine, which can realize continuous slag discharging of the open caisson tunneling machine and solve the problem of high dust in the process of transporting slag soil.

The invention further aims to provide a continuous slag discharging system and a sunk well heading machine, wherein the conveyed slag can form flowing slurry in a slurry preparation box and is discharged outside, the sunk well is not required to have enough water, the problem of large slag discharging water consumption is solved, the occurrence of instability of an excavation surface is avoided, and the construction safety is improved.

The object of the invention can be achieved by the following scheme:

the invention provides a continuous slag discharging system, which comprises a slag extracting pipeline, wherein one end of the slag extracting pipeline is provided with a suction nozzle, the suction nozzle is arranged in a sunk well along with the slag extracting pipeline, and the suction nozzle is positioned close to slag soil or is inserted into the slag soil;

the device is characterized in that a negative pressure fan for providing suction force for the suction nozzle and a separating cylinder for separating the dregs and air sucked into the suction nozzle are arranged on the dreg suction pipeline, the separating cylinder is connected with a mud preparation box so as to convey the dregs obtained by separation into the mud preparation box and mix the mud preparation box with water to form mud, and the mud preparation box is connected with a dreg discharge pipeline so as to discharge the mud in the mud preparation box.

In a preferred embodiment of the invention, the negative pressure fan is located at the downstream of the separating cylinder along the conveying direction of the dregs in the dregs extracting pipeline, and a dust remover is arranged between the negative pressure fan and the separating cylinder.

In a preferred embodiment of the present invention, a separation cavity is formed inside the separation cylinder, the separation cavity is an inverted cone cavity with gradually reduced inner diameter from top to bottom, and separation blades capable of rotating and generating centrifugal force in the separation cavity are arranged in the separation cavity;

the top of the separating cylinder is respectively provided with an inlet and a second outlet which are communicated with the separating cavity, and the bottom of the separating cylinder is provided with a first outlet which is communicated with the separating cavity.

In a preferred embodiment of the present invention, the continuous slag discharging system further includes a wind guard, a first slag inlet and a first slag outlet are provided on the wind guard, a separation blade capable of separating the first slag inlet from the first slag outlet is provided inside the wind guard, and the separation blade is hinged on an inner wall of the wind guard through a rotating shaft.

In a preferred embodiment of the present invention, a second slag inlet is formed in the slurry preparation tank, the first slag inlet on the wind guard is connected to the first outlet on the separating cylinder, and the first slag outlet on the wind guard is connected to the second slag inlet on the slurry preparation tank.

In a preferred embodiment of the present invention, the continuous slag tapping system further comprises a first water delivery pipeline for supplying water to the slurry preparation tank, wherein a mixing cavity is formed in the slurry preparation tank, a water inlet is formed in the slurry preparation tank, the first water delivery pipeline extends into the mixing cavity from the water inlet, and a plurality of spray heads are arranged on the first water delivery pipeline in the mixing cavity; and a spiral stirrer for stirring and mixing the dregs and the water is arranged in the mixing cavity.

In a preferred embodiment of the invention, a first water inlet valve and a flow sensor are arranged on the first water conveying pipeline outside the mixing cavity.

In a preferred embodiment of the invention, the mud preparation tank is provided with a load cell.

In a preferred embodiment of the invention, a second slag hole is arranged on the slurry preparation tank, the slag hole pipeline is connected with the second slag hole, and a slag hole valve is arranged on the slag hole pipeline and close to the second slag hole;

and a mud conveying pump and at least one section of telescopic sleeve are arranged on the slag discharging pipeline.

In a preferred embodiment of the present invention, the slag tapping pipeline is provided with a first pressure sensor, and a plurality of through holes are formed in the slag tapping pipeline so as to inject antifriction liquid into the slag tapping pipeline through the plurality of through holes.

In a preferred embodiment of the present invention, the continuous slag tapping system includes an antifriction liquid conveying pipeline, one end of the antifriction liquid conveying pipeline is connected to a storage tank storing antifriction liquid, the other end of the antifriction liquid conveying pipeline is divided into a plurality of branches and is respectively connected to a plurality of through holes, and antifriction liquid control valves are respectively arranged on the plurality of branches.

In a preferred embodiment of the present invention, the antifriction liquid conveying pipeline is provided with a antifriction liquid conveying pump and a second pressure sensor.

In a preferred embodiment of the invention, the continuous slag tapping system further comprises a second water conveying pipeline, wherein the second water conveying pipeline is connected with the slag tapping pipeline positioned at the upstream of the slurry conveying pump, and a second water inlet valve is arranged on the second water conveying pipeline.

In a preferred embodiment of the present invention, a swivel joint is provided between the slag pumping pipe and the suction nozzle.

In a preferred embodiment of the invention, the continuous slag discharging system further comprises a first driving cylinder and a second driving cylinder, wherein the first driving cylinder is hinged to a tunneling swing arm of the open caisson tunneling machine, and the suction nozzle is arranged on the first driving cylinder;

the second driving cylinder is hinged with the first driving cylinder and the tunneling swing arm respectively.

In a preferred embodiment of the present invention, the continuous slag tapping system further comprises an outer sleeve, one end of the outer sleeve is hinged with the outer wall of the tunneling swing arm, the first driving cylinder is located in the outer sleeve, a piston rod of the first driving cylinder is connected with the inner wall of the outer sleeve, a cylinder body of the first driving cylinder can be slidably arranged in the outer sleeve, and the suction nozzle is arranged on the cylinder body;

the continuous slag discharging system further comprises a first oil pipe and a second oil pipe, the first oil pipe and the second oil pipe are respectively connected with a rod cavity and a rodless cavity of the first driving cylinder, and the piston rod can push the cylinder body to extend out of the outer sleeve from an opening at one end of the outer sleeve.

The invention provides an open caisson tunneling machine which comprises a tunneling machine body and the continuous slag discharging system, wherein a tunneling swing arm is arranged on the tunneling machine body, and a suction nozzle in the continuous slag discharging system is arranged on the tunneling swing arm.

From the above, the continuous slag discharging system and the open caisson tunneling machine have the characteristics and advantages that: the suction nozzle is arranged at one end of the slag pumping pipeline, the suction nozzle can be arranged in the open caisson along with the slag pumping pipeline, the suction nozzle is arranged at a position close to slag soil or is inserted into the slag soil, the suction nozzle can be provided with suction force by the suction nozzle, so that the slag soil can be sucked into the slag pumping pipeline through the suction nozzle, the slag soil sucked into the slag pumping pipeline and air are separated through the separation cylinder, the separated air is discharged outwards, the separated slag soil is conveyed into a mud preparation box connected with the separation cylinder, the slag soil and water are mixed in the mud preparation box to form fluid mud, so that the mud can be discharged outwards through the slag pipeline, and as the process of forming mud in the mud preparation box, the slag soil is not required to be filled with enough water, the problem of high water consumption of slag is solved, the conditions of instability of a digging surface, collapse and the like are avoided, and the tunneling safety of the open caisson is effectively improved. In addition, the slag discharging mode can realize continuous slag discharging of the open caisson tunneling machine, and meanwhile, the situation that serious dust is raised in the slag soil transferring process is avoided.

Drawings

The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.

Wherein:

fig. 1: is a structural schematic diagram of the continuous slag discharging system.

Fig. 2: the connection position of the suction nozzle and the open caisson tunneling machine in the continuous slag discharging system is shown in the schematic diagram.

Fig. 3: the invention discloses a connection structure schematic diagram of a suction nozzle and an open caisson tunneling machine in a continuous slag discharging system.

Fig. 4: the internal structure of the wind-shield in the continuous slag discharging system is schematically shown.

Fig. 5: the internal structure of the mud preparation box in the continuous slag discharging system is schematically shown.

Fig. 6: is a schematic diagram of the internal structure of a separating cylinder in the continuous slag discharging system.

The reference numerals in the invention are:

1. a suction nozzle; 2. a slag extraction pipeline; 3. a negative pressure fan; 4. a separation cylinder; 401. separating the inner cavity; 402. an inlet; 403. a first outlet; 404. a second outlet; 405. separating the blades; 5. a dust remover; 6. a swivel joint; 7. a wind-shielding device; 701. a first slag inlet; 702. a first slag outlet; 703. a rotating shaft; 704. a partition blade; 8. a slurry preparation tank; 801. a mixing chamber; 802. a second slag outlet; 803. a second slag inlet; 804. a water inlet; 9. a first water delivery line; 10. a spray head; 11. a first inlet valve; 12. a flow sensor; 13. a helical agitator; 14. a weighing sensor; 15. a slag discharging pipeline; 16. a second water delivery line; 17. antifriction liquid conveying pipeline; 18. a telescoping tube; 19. a first pressure sensor; 20. a slag discharging valve; 21. a slurry transfer pump; 22. a storage tank; 23. antifriction liquid delivery pump; 24. a second pressure sensor; 25. antifriction liquid control valve; 26. a heading machine main body; 27. tunneling swing arms; 28. a first drive cylinder; 2801. a cylinder; 2802. a piston rod; 29. a second driving cylinder; 30. an outer sleeve; 31. a first oil pipe; 32. a second oil pipe; 33. and a second water inlet valve.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.

Embodiment one

As shown in fig. 1, the invention provides a continuous slag discharging system, which comprises a slag extracting pipeline 2, wherein one end of the slag extracting pipeline 2 is provided with a suction nozzle 1, the suction nozzle 1 is lowered into an open caisson along with the slag extracting pipeline 2, and according to the actual slag discharging condition, the suction nozzle 1 can be lowered into the open caisson and is close to the position of slag or the suction nozzle 1 is inserted into the slag, so that the purpose of sucking the slag is achieved; the slag pumping pipeline 2 is provided with a negative pressure fan 3 and a separating cylinder 4, the negative pressure fan 3 is used for providing suction force for the suction nozzle 1, the separating cylinder 4 is used for separating slag and air sucked into the slag pumping pipeline 2, the continuous slag discharging system further comprises a mud preparation box 8, the separating cylinder 4 is connected with the mud preparation box 8 so as to convey slag separated in the separating cylinder 4 into the mud preparation box 8, the slag is mixed with water in the mud preparation box 8 to form mud, the mud preparation box 8 is connected with a slag discharging pipeline 15 so as to discharge mud in the mud preparation box 8, and the purpose of continuous slag discharging is achieved.

According to the invention, the suction nozzle 1 is arranged at one end of the slag pumping pipeline 2, the suction nozzle 1 can be arranged in the open caisson along with the slag pumping pipeline 2, the negative pressure fan 3 and the separating cylinder 4 are arranged on the slag pumping pipeline 2, and the negative pressure fan 3 can provide suction force for the suction nozzle 1, so that the slag soil can be sucked into the slag pumping pipeline 2 through the suction nozzle 1, the separated air is discharged outwards through the separating cylinder 4, the separated slag soil is conveyed into the mud preparation box 8 connected with the separating cylinder 4, the slag soil and water are mixed in the mud preparation box 8 to form fluid mud, so that the mud can be discharged outwards through the slag production pipeline 15, and as the process of forming mud in the mud preparation box 8, the slag does not need to be filled with enough water, the problem of large slag water consumption is solved, the conditions of unstable excavation surface, stratum and the like are avoided, and the safety of the open caisson is effectively improved. In addition, the slag discharging mode can realize continuous slag discharging of the open caisson tunneling machine, and meanwhile, the situation that serious dust is raised in the slag soil transferring process is avoided.

In the invention, the negative pressure fan 3 can adopt a variable frequency fan, and the real-time control of the slag discharging speed can be realized by changing the rotating speed of the fan in the actual slag discharging process.

In an alternative embodiment of the invention, as shown in fig. 1, the negative pressure fan 3 is located downstream of the separating drum 4 along the conveying direction of the slag soil in the slag extraction pipeline 2, and a dust remover 5 is arranged between the negative pressure fan 3 and the separating drum 4. The negative pressure fan 3 not only can provide suction force for conveying the dregs, but also can discharge the air obtained by separation in the separating cylinder 4 through the negative pressure fan 3, so that smooth separation of the dregs and the air in the separating cylinder 4 is ensured. In the air discharging process, dust in the air is filtered through the dust remover 5, so that the influence of a large amount of dust on the environment along with the air discharging is avoided. The negative pressure fan 3 can discharge air to the excavation surface through the pipeline, so that the negative pressure fan has the effects of inhibiting dust emission on the excavation surface and supplementing air for the excavation surface.

Further, the dust remover 5 may be, but not limited to, a pulse bag-type dust remover, and the pulse bag-type dust remover adopts low-pressure pulse to perform blowing and ash removal, so that the problems of secondary adhesion and out-of-control of dust and the like can be prevented, the ash removal effect of the filter bag is enhanced, the filtering speed is improved, the ash removal energy consumption is saved, and the service life of the filter bag is prolonged. The pulse bag-type dust collector can be controlled by a PLC programmable controller, and the ash cleaning and transporting processes are automatically controlled, so that the pulse bag-type dust collector has the characteristics of large treatment air quantity, good ash cleaning effect, high dust removing efficiency, reliable operation, convenient maintenance, small occupied area and the like.

In an alternative embodiment of the present invention, as shown in fig. 1 and 6, a separation cavity 401 is formed inside the separation cylinder 4, the separation cavity 401 is an inverted cone cavity with gradually decreasing inner diameter from top to bottom, and separation blades 405 capable of rotating and generating centrifugal force in the separation cavity 401 are arranged in the separation cavity 401; the top of the separating cylinder 4 is provided with an inlet 402 and a second outlet 404 which are communicated with the separating cavity 401, and the bottom of the separating cylinder 4 is provided with a first outlet 403 which is communicated with the separating cavity 401. After the air flow in the slag extraction pipeline 2 carries slag soil to enter the separation cylinder 4 from an inlet 402 on the separation cylinder 4 along the direction tangential to the inner wall of the separation cavity 401, the air flow is guided by a separation blade 405 to generate strong rotation in the separation cavity 401, the slag soil is thrown onto the inner wall of the separation cavity 401 under the action of centrifugal force and slides down to a first outlet 403 along the inner wall of the separation cavity 401 under the action of self gravity, and is discharged from the first outlet 403; the gas in the separation cavity 401 flows towards the center and forms a secondary vortex upwards, and can be discharged from the second outlet 404 under the suction action of the negative pressure fan 3, so that the separation of the dregs and the air is realized.

In an alternative embodiment of the invention, as shown in fig. 1 and 4, the continuous slag discharging system further comprises a wind guard 7, wherein a first slag inlet 701 and a first slag outlet 702 are arranged on the wind guard 7, a second slag inlet 803 is arranged on the slurry preparation tank 8, the first slag inlet 701 on the wind guard 7 is connected with the first outlet 403 on the separating drum 4, and the first slag outlet 702 on the wind guard 7 is connected with the second slag inlet 803 on the slurry preparation tank 8. The inside of the wind guard 7 is provided with a rotatable separation blade 704, the first slag inlet 701 and the first slag outlet 702 can be separated through the separation blade 704, a rotating shaft 703 is arranged on the inner wall of the wind guard 7, the rotating shaft 703 is connected with an output shaft of a variable frequency motor, and the separation blade 704 is hinged on the inner wall of the wind guard 7 through the rotating shaft 703. The dregs separated by the separating cylinder 4 enter the wind guard 7 from the first dregs inlet 701 of the wind guard 7, the wind guard 7 drives the separating blades 704 to rotate through the variable frequency motor, so that the dregs in the wind guard 7 are stirred by the separating blades 704 from the first dregs inlet 701 to the first dregs outlet 702, and the first dregs outlet 702 discharges the dregs into the mud preparation box 8. The rotating speed of the separation blade 704 can be controlled by changing the rotating speed of the variable frequency motor, so that the conveying speed of the dregs can be controlled, the separation blade 704 is used for isolating the negative pressure air in the separating cylinder 4 from the thick mud preparation box 8, and the influence of the negative pressure environment in the separating cylinder 4 on the normal operation of the thick mud preparation box 8 is avoided.

In an alternative embodiment of the present invention, as shown in fig. 1 and 5, the continuous slag discharging system further comprises a first water conveying pipeline 9 for supplying water into the slurry preparation tank 8, a mixing inner cavity 801 is formed in the slurry preparation tank 8, a water inlet 804 is formed in the upper part of the slurry preparation tank 8, a second slag outlet 802 is formed in the lower part of the slurry preparation tank 8, the first water conveying pipeline 9 extends into the mixing inner cavity 801 from the water inlet 804, and a plurality of spray heads 10 are uniformly arranged on the first water conveying pipeline 9 in the mixing inner cavity 801; a spiral stirrer 13 for stirring and mixing the slag and the water is arranged in the mixing cavity 801. The slag soil and water can be mixed in the mixing cavity 801 to form slurry, and the water quantity in the mixing cavity 801 can be controlled through the arrangement of the first water conveying pipeline 9 and the spray head 10, so that the concentration of the formed slurry is controlled, and the uniform mixing of the slag soil and the water is ensured. In the mixing process of the muck and the water, the muck and the water are stirred by the spiral stirrer 13 for preparing the slurry, and the spiral stirrer 13 has the pushing effect, and can push the slurry to a position close to the second slag hole 802 while stirring, so that the slurry is discharged conveniently.

Further, as shown in fig. 1 and 5, a first water inlet valve 11 and a flow sensor 12 are provided on the first water delivery pipeline 9 outside the mixing cavity 801. The amount of water supplied into the mud preparation tank 8 is detected by the flow rate sensor 12, and the amount of water supplied is controlled by the first water inlet valve 11.

Further, as shown in fig. 1 and 5, the mud preparing tank 8 is provided with a load cell 14. The weight of the slurry in the slurry preparation tank 8 can be obtained by detecting the weight of the slurry preparation tank 8 through the weighing sensor 14, and the water slag proportion in the slurry preparation tank 8 can be controlled through the cooperation of the flow sensor 12 and the weighing sensor 14, so that the ideal slurry concentration is achieved. In the process of discharging the slurry in the slurry preparation tank 8, the discharge amount of the slurry per unit time can be determined from the amount of change in the unit time of the data detected by the load cell 14.

Further, as shown in fig. 1 and 5, the tapping line 15 is connected to the second tap hole 802, and a tapping valve 20 is provided on the tapping line 15 near the second tap hole 802. The mud discharging state of the mud preparing tank 8 and the discharge amount of mud per unit time can be controlled by the tapping valve 20.

In an alternative embodiment of the present invention, as shown in fig. 1, a slurry transfer pump 21 is provided on the slag line 15 to improve the transfer efficiency of the slurry.

Further, as shown in fig. 1, the outlet end of the slag discharging pipeline 15 is connected with a slag car, so that the slurry can be conveyed to the slag car for centralized treatment, at least one section of telescopic tube 18 is arranged on the slag discharging pipeline 15 and near the outlet end of the slag discharging pipeline 15, and the telescopic tube 18 is connected in series on the slag discharging pipeline 15. In the tunneling process, the length of the telescopic tube 18 can be adjusted along with the increase of the tunneling depth so as to prolong the length of the slag discharging pipeline 15; the telescoping tube 18 is retrieved as the tube segments are assembled. Of course, the telescopic tube 18 can be replaced by a telescopic tube with other structures, and the requirement of adjusting the length of the slag discharging pipeline 15 can be met.

Further, as shown in fig. 1, a first pressure sensor 19 is disposed on the slag discharging pipeline 15 and near the outlet of the slurry conveying pump 21, and the pressure condition in the slag discharging pipeline 15 can be directly reflected by the first pressure sensor 19, so as to determine whether the slag discharging pipeline 15 is in a smooth slag discharging state. Of course, when the first pressure sensor 19 fails, it is also possible to determine whether or not the slag discharge is smooth by the delivery pressure of the slurry delivery pump 21, and to avoid the occurrence of clogging of the slag discharge line 15 with slurry.

In an alternative embodiment of the present invention, the slag discharging pipeline 15 is fixed on a pipe sheet in the open caisson, the slag discharging pipeline 15 can adopt, but is not limited to, a steel-plastic composite pipe, and the inner wall of the slag discharging pipeline 15 is smooth so as to reduce slag discharging resistance. A plurality of through holes (not shown) are formed in the slag discharging pipeline 15, the through holes are uniformly distributed in the slag discharging pipeline 15, and antifriction liquid can be injected into the slag discharging pipeline 15 through the through holes. After entering the slag discharge pipeline 15, the antifriction liquid can form a smooth mud film around mud and on the inner wall of the slag discharge pipeline 15, so that the conveying resistance of the mud is effectively reduced, and the smooth discharge of the mud is ensured.

Specifically, as shown in fig. 1, the continuous slag discharging system comprises an antifriction liquid conveying pipeline 17, one end of the antifriction liquid conveying pipeline 17 is connected with a storage tank 22 for storing antifriction liquid, the other end of the antifriction liquid conveying pipeline 17 is divided into a plurality of branches and is respectively connected with a plurality of through holes, and antifriction liquid control valves 25 are respectively arranged on the plurality of branches. The injection amount and injection position of the antifriction liquid are controlled through the antifriction liquid control valve 25, the discharge of the slurry is controlled in a targeted manner, and smooth discharge of the slurry is ensured while the use of the antifriction liquid is reduced as much as possible.

Further, as shown in fig. 1, the antifriction liquid conveying line 17 is provided with a antifriction liquid conveying pump 23 and a second pressure sensor 24. Antifriction liquid is pumped into the slag discharging pipeline 15 through the antifriction liquid conveying pump 23, and in the process of pumping antifriction liquid, the pressure in the antifriction liquid conveying pipeline 17 is detected through the second pressure sensor 24, so that the antifriction liquid in the antifriction liquid conveying pipeline 17 is ensured to be smoothly output. The antifriction liquid can be conveyed in two modes of automatic control and manual control, in the automatic control mode, when the pressure in the slag tapping pipeline 15 is detected by the first pressure sensor 19 to exceed the preset maximum pressure threshold value, the antifriction liquid conveying pump 23 is automatically controlled to start, and meanwhile, the antifriction liquid control valve 25 is opened to convey antifriction liquid into the slag tapping pipeline 15; when the pressure of the slag discharging pipeline 15 is reduced to a preset pressure value, the antifriction liquid conveying pump 23 is automatically controlled to stop, and the antifriction liquid control valve 25 is closed; in the manual control mode, the above-described control of the antifriction liquid feed pump 23 and antifriction liquid control valve 25 is performed manually by a worker.

Further, as shown in fig. 1, the continuous slag discharging system further comprises a second water conveying pipeline 16, the second water conveying pipeline 16 is connected with the slag discharging pipeline 15 positioned at the upstream of the slurry conveying pump 21, and a second water inlet valve 33 is arranged on the second water conveying pipeline 16. When the concentration of the slurry in the slag discharging pipeline 15 needs to be reduced, water can be supplied to the slag discharging pipeline 15 through the second water conveying pipeline 16 so as to achieve the purpose of reducing the concentration of the slurry; in addition, when the slag line 15 is or will be clogged, water may be injected into the slag line 15 through the second water delivery line 16 to flush the clogged position, thereby ensuring the conductive state of the slag line 15.

In an alternative embodiment of the invention, as shown in fig. 1, a swivel joint 6 is provided between the slag extraction pipeline 2 and the suction nozzle 1, so that the suction nozzle 1 can rotate with the tunneling swing arm 26 of the tunneling machine, and the slag extraction pipeline 2 cannot influence the slag stone conveying.

In an alternative embodiment of the invention, as shown in fig. 1 and 2, the continuous slag tapping system further comprises a first driving cylinder 28 and a second driving cylinder 29, wherein the first driving cylinder 28 is hinged on a tunneling swing arm 27 of the open caisson tunneling machine, and the suction nozzle 1 is arranged on the first driving cylinder 28; one end of the second driving cylinder 29 is hinged with the first driving cylinder 28, and the other end of the second driving cylinder 29 is hinged with the tunneling swing arm 27. The inclination angle of the suction nozzle 1 can be adjusted through the second driving cylinder 29, the distance between the suction nozzle 1 and the muck or the depth of the suction nozzle 1 inserted into the muck can be controlled through the first driving cylinder 28, the deeper the suction nozzle 1 is inserted into the muck, the smaller the effective section of the sucked air is, and the change of the air flow rate can cause the change of the speed of sucking the muck; the first driving cylinder 28, the second driving cylinder 29 and the negative pressure fan 3 can be controlled in a linkage manner, when the negative pressure fan 3 is not started or fails, the piston rod 2802 of the first driving cylinder 28 and the piston rod of the second driving cylinder 29 are recovered, so that the suction nozzle 1 is far away from the dregs, and the situation that the dregs block the dregs pumping pipeline 2 is avoided.

Specifically, as shown in fig. 3, the continuous slag discharging system further includes an outer sleeve 30, the outer sleeve 30 is a cylindrical structure with one end sealed and one end open, one end (sealed end) of the outer sleeve 30 is hinged with the outer wall of the tunneling swing arm 27, the first driving cylinder 28 is located in the outer sleeve 30, a piston rod 2802 of the first driving cylinder 28 is connected with the inner wall of the outer sleeve 30, a cylinder body 2801 of the first driving cylinder 28 can be slidably arranged in the outer sleeve 30, and the suction nozzle 1 is arranged on the cylinder body 2801; the continuous slag discharging system further comprises a first oil pipe 31 and a second oil pipe 32, wherein the first oil pipe 31 is connected with the rod cavity of the first driving cylinder 28, the second oil pipe 32 is connected with the rod-free cavity of the first driving cylinder 28, and the piston rod 2802 can push the cylinder body 2801 to extend out of the outer sleeve 30 from an opening at one end of the outer sleeve 30. The piston rod 2802 of the first driving cylinder 28 is arranged in the outer sleeve 30, so that damage caused by contact between the piston rod 2802 of the first driving cylinder 28 and external residue in the working process can be effectively avoided, and the service life of the first driving cylinder 28 is prolonged.

Wherein, the suction inlet of the suction nozzle 1 is a bevel of 45 degrees, and a wear-resistant material layer is welded on the outer wall of the suction nozzle 1 to improve the wear resistance of the suction nozzle 1. Further, be provided with the camera (not shown) on suction nozzle 1, the external display screen of camera can gather the behavior of suction nozzle 1 department through the camera to show through the display screen, so that the staff looks over long-range.

The working process of the continuous slag discharging system comprises the following steps: after the negative pressure fan 3 is controlled to start, air at the suction nozzle 1 flows to the negative pressure fan 3 along the slag pumping pipeline 2 under the action of the negative pressure fan 3, meanwhile, a negative pressure environment is formed in the slag pumping pipeline 2, after the flow speed of the air in the slag pumping pipeline 2 can enable the slag soil to be in a suspended state, the slag soil at the suction nozzle 1 is carried by the air flow to enter the slag pumping pipeline 2 and flows to the separating cylinder 4 along with the air flow, in the separating cylinder 4, the air is separated from the slag soil, the slag soil is deposited at the bottom of the separating cylinder 4 and enters the wind guard 7, the slag soil enters the slurry preparation box 8 through the wind guard 7, the air flow separated in the separating cylinder 4 is discharged by the negative pressure fan 3 after being filtered by the dust remover 5, and the discharged air flow can be led to the excavation surface through the pipeline, so that the air on the excavation surface is supplemented while dust raising of the excavation surface is inhibited. In the mud preparation box 8, the dregs and water are mixed to form viscous mud with certain fluidity, and the viscous mud can be conveyed to a dregs truck for centralized outward transportation and treatment through a dregs conveying pump 21 by a dregs conveying pipeline 15, so that continuous dregs of a caisson are realized.

The continuous slag tapping system of the invention has the characteristics and advantages that:

1. this continuous slag discharging system carries dregs and water to mud preparation incasement 8 respectively, mixes dregs and water in mud preparation incasement 8 and forms the mud that has fluidity to can carry out the outer row with mud through slag discharging pipeline 15, because the process that dregs formed mud goes on in mud preparation incasement 8, consequently, need not to ask again to fill sufficient water yield into the open caisson, solved the big problem of slag discharging water consumption, avoided the emergence of excavation face unstability and stratum collapse etc. condition, effectively promoted the security that the open caisson was tunneled.

2. This continuous slag discharging system adopts the mode of pumping to carry the sediment soil car with the mud after mixing, can carry the high improvement by a wide margin of dregs, also can not appear the circumstances of serious raise dust simultaneously.

3. The continuous slag discharging system can realize continuous slag discharging of the open caisson heading machine, solves the problem of high dust in the slag soil transferring process, enables the slag soil to be fluid slurry in the slurry preparation box 8 only through a small amount of water, and solves the problem of high mud water circulation slag discharging water consumption.

Second embodiment

The invention relates to an open caisson tunneling machine, which comprises a tunneling machine main body 26 and the continuous slag discharging system, wherein as shown in fig. 2, the tunneling machine main body 26 is provided with a tunneling swing arm 26, the tunneling swing arm 26 is connected with a cutterhead, and a suction nozzle 1 in the continuous slag discharging system is arranged on the tunneling swing arm 26.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.

Claims (17)

1. The continuous slag discharging system is characterized by comprising a slag extracting pipeline (2), wherein a suction nozzle (1) is arranged at one end of the slag extracting pipeline (2), the suction nozzle (1) is arranged in the open caisson along with the slag extracting pipeline (2), and the suction nozzle (1) is positioned close to the slag soil or is inserted into the slag soil;

the device is characterized in that a negative pressure fan (3) for providing suction force for the suction nozzle (1) and a separating cylinder (4) for separating dregs and air sucked into the suction nozzle (2) are arranged on the suction nozzle (2), the separating cylinder (4) is connected with a mud preparation box (8) so as to convey the dregs obtained by separation into the mud preparation box (8) and mix the dregs with water in the mud preparation box (8) to form mud, and the mud preparation box (8) is connected with a slag discharge pipeline (15) so as to discharge the mud in the mud preparation box (8).

2. Continuous tapping system according to claim 1, characterized in that the negative pressure fan (3) is located downstream of the separation drum (4) in the conveying direction of the slag in the slag extraction line (2), and that a dust separator (5) is arranged between the negative pressure fan (3) and the separation drum (4).

3. Continuous tapping system according to claim 1 or 2, characterized in that the interior of the separation drum (4) forms a separation cavity (401), the separation cavity (401) being an inverted conical cavity with a decreasing inner diameter from top to bottom, the separation cavity (401) being provided with separation blades (405) which are rotatable and which generate centrifugal forces in the separation cavity (401);

the top of the separation cylinder (4) is respectively provided with an inlet (402) and a second outlet (404) which are communicated with the separation inner cavity (401), and the bottom of the separation cylinder (4) is provided with a first outlet (403) which is communicated with the separation inner cavity (401).

4. A continuous slag tapping system as claimed in claim 3, characterized in that the continuous slag tapping system further comprises a wind guard (7), a first slag inlet (701) and a first slag outlet (702) are arranged on the wind guard (7), a separation blade (704) capable of separating the first slag inlet (701) from the first slag outlet (702) is arranged inside the wind guard (7), and the separation blade (704) is hinged on the inner wall of the wind guard (7) through a rotating shaft (703).

5. The continuous slag tapping system as defined in claim 4, characterized in that a second slag inlet (803) is provided in said slurry preparation tank (8), said first slag inlet (701) in said wind guard (7) being connected to said first outlet (403) in said separating drum (4), said first slag outlet (702) in said wind guard (7) being connected to said second slag inlet (803) in said slurry preparation tank (8).

6. The continuous slag tapping system as claimed in claim 1, further comprising a first water delivery line (9) for supplying water into the slurry preparation tank (8), wherein a mixing cavity (801) is formed in the slurry preparation tank (8), a water inlet (804) is provided in the slurry preparation tank (8), the first water delivery line (9) extends from the water inlet (804) into the mixing cavity (801), and a plurality of spray heads (10) are provided on the first water delivery line (9) in the mixing cavity (801); a spiral stirrer (13) for stirring and mixing the dregs and the water is arranged in the mixing cavity (801).

7. Continuous tapping system according to claim 6, characterized in that a first water inlet valve (11) and a flow sensor (12) are provided on the first water feed line (9) outside the mixing chamber (801).

8. Continuous tapping system according to claim 6, characterized in that the mud preparation tank (8) is provided with a load cell (14).

9. Continuous tapping system according to claim 1, characterized in that the slurry preparation tank (8) is provided with a second tap hole (802), the tapping line (15) is connected to the second tap hole (802), and a tapping valve (20) is provided on the tapping line (15) and close to the second tap hole (802);

the slag discharging pipeline (15) is provided with a mud conveying pump (21) and at least one section of telescopic sleeve (18).

10. Continuous tapping system according to claim 1 or 9, characterized in that the tapping line (15) is provided with a first pressure sensor (19), and that the tapping line (15) is provided with a plurality of through holes for injecting antifriction liquid into the tapping line (15) through a plurality of said through holes.

11. Continuous tapping system according to claim 10, characterized in that the continuous tapping system comprises a antifriction liquid conveying pipe (17), one end of the antifriction liquid conveying pipe (17) is connected to a storage tank (22) storing antifriction liquid, the other end of the antifriction liquid conveying pipe (17) is divided into a plurality of branches and is connected to a plurality of through holes respectively, and antifriction liquid control valves (25) are arranged on the branches respectively.

12. Continuous tapping system according to claim 11, characterized in that the antifriction liquid feed line (17) is provided with a antifriction liquid feed pump (23) and a second pressure sensor (24).

13. Continuous tapping system according to claim 9, characterized in that the continuous tapping system further comprises a second water feed line (16), the second water feed line (16) being connected to the tapping line (15) upstream of the slurry feed pump (21), the second water feed line (16) being provided with a second water inlet valve (33).

14. Continuous tapping system according to claim 1, characterized in that a swivel joint (6) is provided between the tapping line (2) and the suction nozzle (1).

15. Continuous tapping system according to claim 1, characterized in that the continuous tapping system further comprises a first driving cylinder (28) and a second driving cylinder (29), the first driving cylinder (28) being hinged to a driving swing arm (27) of a sunk well heading machine, the suction nozzle (1) being provided on the first driving cylinder (28);

the second driving cylinder (29) is hinged with the first driving cylinder (28) and the tunneling swing arm (27) respectively.

16. The continuous slag tapping system as defined in claim 15, further comprising an outer sleeve (30), one end of the outer sleeve (30) being hinged to the outer wall of the driving swing arm (27), the first driving cylinder (28) being located inside the outer sleeve (30), a piston rod (2802) of the first driving cylinder (28) being connected to the inner wall of the outer sleeve (30), a cylinder body (2801) of the first driving cylinder (28) being slidably arranged inside the outer sleeve (30), the suction nozzle (1) being arranged on the cylinder body (2801);

the continuous slag discharging system further comprises a first oil pipe (31) and a second oil pipe (32), the first oil pipe (31) and the second oil pipe (32) are respectively connected with a rod cavity and a rodless cavity of the first driving cylinder (28), and the piston rod (2802) can push the cylinder body (2801) to extend out of the outer sleeve (30) from an opening at one end of the outer sleeve (30).

17. Open caisson heading machine, characterized in that it comprises a heading machine body (26) and a continuous slag discharging system according to any one of claims 1 to 16, wherein a heading swing arm (27) is arranged on the heading machine body (26), and a suction nozzle (1) in the continuous slag discharging system is arranged on the heading swing arm (27).

Images