CN219809006U

CN219809006U - Slag discharging system and push bench

Info

Publication number: CN219809006U
Application number: CN202321193878.2U
Authority: CN
Inventors: 薛广记; 刘恒杰; 王占飞; 董艳萍; 孙磊; 闫扬义; 袁征; 安乐乐; 冯战勇
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-10-10
Anticipated expiration: 2033-05-17

Abstract

The utility model belongs to the technical field of tunneling equipment, and particularly provides a slag discharging system and a push bench. The slag discharging system comprises a slag conveying device for conveying main machine to excavate slag outwards and at least two slag vehicles, wherein a slag receiving position and a waiting position beside the slag receiving position are arranged below the slag conveying device, and the slag discharging system further comprises a slag vehicle switching device which is used for moving the slag vehicles to switch the slag vehicles from the waiting position to the slag receiving position. The slag car switching device and the slag car are matched to work, uninterrupted slag discharge is achieved, meanwhile, when one slag car receives slag, the slag car with a full bucket can synchronously carry out slag outward, namely, uninterrupted slag discharge from a tunnel to the outside of an originating well is achieved, and tunneling slag discharge efficiency of the push bench is improved.

Description

Slag discharging system and push bench

Technical Field

The utility model belongs to the technical field of tunneling equipment, and particularly relates to a slag discharging system and a push bench.

Background

The earth pressure balance pipe pushing jack is widely applied to the field of construction of existing tunnels of urban street crossing channels or underground connecting channels. The existing conventional earth pressure balance pipe jacking machine adopts a slag discharging system consisting of a screw conveyor and a single slag car for slag discharging. The spiral conveyor conveys the dregs into the dregs car, when the dregs car is full of the hopper, the machine is stopped, the gate of the spiral conveyor is closed, the dregs car moves to an originating wellhead, the dregs car is lifted out of the tunnel by the wellhead crane to discharge dregs, the original path of the dregs car returns after the dregs are discharged, and then the machine is started to continue tunneling. The equipment utilization rate of the slag tapping system is low, even less than 50%, and the slag tapping efficiency is low. In addition, frequent startup and shutdown can also impact the pushing excavation system and the main drive, so that the service life of the equipment is shortened. Moreover, the screw conveyor is frequently opened and closed, so that the pressure of the front soil bin is unstable, and the surface subsidence is difficult to accurately control.

The Chinese patent with the authorized bulletin number of CN214836372U (publication date: 2021.11.23) discloses a pipe jacking machine based on a belt conveyor and multi-slag car discharging, and the pipe jacking machine realizes continuous slag tapping of single-ring pipe joints through the belt conveyor and slag car grouping. However, for large tunnels, particularly tunnels with rectangular cross sections, the single-ring pipe pieces need more muck to be transported out, the number of muck car groups is more, the turnover in the tunnels is difficult, moreover, the wellhead crane needs longer time to completely hoist the tunnels in the process of hoisting the muck car groups, and the slag discharging efficiency and the construction efficiency are still not high.

Disclosure of Invention

The utility model aims to provide a slag discharging system so as to solve the technical problem of low slag discharging efficiency of a pipe jacking machine in the prior art. The utility model also aims to provide the push bench with the slag discharging system so as to solve the same technical problems.

In order to achieve the above purpose, the slag tapping system provided by the utility model has the technical scheme that:

the slag discharging system comprises a slag conveying device for conveying main machine excavation slag outwards and at least two slag vehicles, wherein a slag receiving position and a waiting position beside the slag receiving position are arranged below the slag conveying device, and the slag discharging system further comprises a slag vehicle switching device which is used for moving the slag vehicles to switch the slag vehicles from the waiting position to the slag receiving position.

The beneficial effects are that: the slag discharging system of the existing pipe pushing machine is improved, when the pipe pushing machine works normally, the slag car at the slag receiving position receives slag from the screw conveyor or the belt conveyor, the slag car at the waiting position keeps a standby state, when the slag car at the waiting position is full of slag, the slag car switching device drives the slag car at the waiting position to move to the slag receiving position to start to receive slag, the full-bucket slag car moves to a wellhead, and the slag car is lifted out by the wellhead crane. The slag car switching device and the slag car are matched to work, uninterrupted slag discharge is achieved, meanwhile, when one slag car receives slag, the slag car with a full bucket can synchronously carry out slag outward, namely, uninterrupted slag discharge from a tunnel to the outside of an originating well is achieved, and tunneling slag discharge efficiency of the push bench is improved.

As a further improvement, the slag car switching device comprises a rail hanging system, wherein the rail hanging system comprises a top rail arranged at the top of the tunnel and a slag car crane capable of moving back and forth along the top rail, and a hanging rope of the slag car crane is provided with a connecting structure for hanging the slag car.

The beneficial effects are that: the rail hanging system can be used for hanging the slag car to the top of the slag car at the slag receiving position, and the slag car can directly receive the slag by the slag car which is placed down, so that the slag car switching efficiency is improved. Meanwhile, the rail hanging system occupies less space on the lower parts of the left side and the right side of the tunnel, and arrangement connection of other equipment is not affected.

As a further improvement, the left side and the right side of the top of the tunnel are respectively provided with the top rail, and the top rails on the left side and the right side are respectively provided with the slag car crane.

The beneficial effects are that: the two side cranes hoist the slag car, so that the stability of the slag car during movement is improved.

As a further improvement, the top rail is provided with at least two slag car cranes arranged in tandem.

The beneficial effects are that: the multi-point support for the slag car is formed, and the stability of the slag car during movement is further improved.

As a further improvement, the front and rear adjacent slag car cranes are connected by rigid connectors.

The beneficial effects are that: the synchronization of the front and rear slag car cranes in moving is ensured, and the stability is improved.

As a further improvement, the distance between the top rails at the left side and the right side is not smaller than the wheel distance between the travelling wheels at the left side and the right side of the slag car.

As a further improvement, the top rail is also provided with a limiting structure for limiting the forward and backward movement range of the slag car crane.

The beneficial effects are that: the slag car crane is prevented from falling off from the top rail, and the operation safety is improved.

As a further improvement, the limit structure is arranged at the front end and the rear end of the top rail.

The beneficial effects are that: the length of the top rail is effectively utilized, the top rail does not need to be prolonged too much, and the installation is convenient.

As a further improvement, the top rail is an I-shaped rail, and the slag car crane is connected with a rail holding travelling device.

The beneficial effects are that: the rail does not need to be designed separately, and the cost is low.

In order to achieve the above purpose, the technical scheme of the push bench provided by the utility model is as follows:

the push bench comprises a slag discharging system, wherein the slag discharging system comprises a slag conveying device for conveying main machine to excavate slag soil outwards and at least two slag vehicles, a slag soil receiving position and a waiting position beside the slag soil receiving position are arranged below the slag conveying device, and the slag discharging system further comprises a slag vehicle switching device which is used for moving the slag vehicles to switch the slag vehicles from the waiting position to the slag soil receiving position.

Drawings

FIG. 1 is a schematic view showing the operation state of the slag discharging system of the embodiment 1 of the present utility model when integrated in a push bench;

FIG. 2 is a schematic view of the slag tapping system according to the present utility model, illustrating the structure of an embodiment 1;

FIG. 3 is a rear view of embodiment 1 of the tapping system according to the present utility model;

FIG. 4 is a schematic view of a slag car in embodiment 1 of the slag discharging system of the present utility model;

FIG. 5 is a rear view of the rail hoist system of embodiment 1 of the slag tapping system of the present utility model;

FIG. 6 is a side view of the rail hoist system of embodiment 1 of the slag tapping system of the present utility model;

FIG. 7 is a schematic view showing the construction of an embodiment 2 of the slag tapping system according to the present utility model.

Reference numerals illustrate:

1. excavating a system; 2. a shield system; 3. a main drive system; 4. a hinge system; 5. a slag tapping system; 6. a pushing system; 7. a pipe section; 8. a grouting system; 9. a hydraulic system; 10. a control system; 11. a wellhead crane; 12. a rotary platform; 21. front shield; 22. tail shield; 51. a screw conveyor; 52. slag car; 52a, slag car number one; 52b, slag car number two; 53. slag car tracks; 54. a rail suspension system; 511. an outer sleeve; 512. a screw shaft; 513. a screw drive unit; 514. a gate; 515. a slag tapping section; 521. a slag bucket; 522. a chassis; 523. a wheel; 524. a slag car driving unit; 525. a slag car controller; 526. a cable drum; 541. a head rail; 542. a pressing plate; 543. a slag car crane; 544. a connecting plate; 545. and a limiting block.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.

In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

The present utility model is described in further detail below with reference to examples.

Specific example 1 of slag tapping system provided by the utility model:

the slag discharging system provided by the embodiment is used in the push bench to realize uninterrupted slag discharging of the push bench. As shown in fig. 1, the pipe jacking machine comprises an excavation system 1, a shield body system 2, a main driving system 3, a hinging system 4, a slag discharging system 5, a pushing system 6, a pipe joint 7, a grouting system 8, a hydraulic system 9, a control system 10 and the like, and a wellhead crane 11 is further arranged at the wellhead of an originating well.

The excavation system 1 is positioned at the forefront part of the push bench and is mainly used for excavating soil in front. The excavation system in this embodiment is a multi-cutter structure, and can be used to excavate rectangular sections. The shield system 2 is mainly used for supporting soil above and beside the front section of the excavated area and is used as a mounting frame of other systems and mainly comprises a front shield 21 and a tail shield 22. The main driving system 3 is mainly used for providing power for the excavation system 1, and a shell of the driving device is installed on a front shield 21 partition plate through a flange. The articulated system 4 is used for realizing the adjustment of the up-down direction and the left-right direction of the host machine, mainly comprises an articulated cylinder, an articulated seal and the like, wherein one end of the articulated cylinder is connected with the front shield 21, one end of the articulated cylinder is connected with the tail shield 22, and the adjustment of the up-down direction and the left-right direction of the host machine is realized through the travel difference between the articulated cylinders in different directions. The hinge seal is located between the front shield 21 and the rear shield 22, mainly for sealing the hinge portion.

The pushing system 6 is used for forward pushing of the shield body system 2 and the pipe joint 7, and mainly comprises a main pushing oil cylinder and an oil cylinder bracket. The grouting system 8 is mainly used for filling an excavation gap in time and forming a slurry sleeve while tunneling equipment, and can be divided into a front synchronous grouting system and a rear slurry supplementing system, wherein the synchronous grouting system is mainly used for injecting slurry comprising a front shield, a tail shield and front 3-5 ring pipe joints in synchronization with a propelling process. The slurry supplementing system is mainly used for supplementing slurry of the rear pipe joint and mainly comprises a slurry injecting pump, a slurry preparing tank, a plurality of slurry injecting pipelines and the like. The hydraulic system 9 is mainly used for providing power to the hinging system 4 and mainly comprises a hydraulic pump station and a hydraulic pipeline. The control system 10 is mainly used for realizing the electrical control of the executive components in each system of the push bench.

As shown in fig. 2 and 3, the slag discharging system 5 includes a slag conveying device, two slag cars 52, a slag car rail 53 provided at the bottom of the tunnel, and a slag car switching device. The slag conveying device is used for conveying slag soil excavated by a main machine outwards, specifically, in the embodiment, a screw conveyor 51 for a soil pressure balance pipe jacking machine is arranged, the front end of the screw conveyor 51 stretches into a soil bin of a shield system 2, and the main effect of the slag conveying device in the working process of the pipe jacking machine is to discharge the slag soil on the premise of ensuring the stability of the pressure of the soil bin. The soil discharge amount in unit time can be adjusted by adjusting the rotation speed of the screw conveyor 51, when the propelling speed is fixed, the soil bin pressure can be controlled by adjusting the soil discharge amount, when the soil bin pressure is higher, the earth surface has a rising trend, and at the moment, the soil discharge amount is required to be increased, and the soil bin pressure is reduced. When the pressure of the soil bin is low, the earth surface has a tendency to settle, and the soil discharge amount is required to be reduced, and the pressure of the soil bin is increased, so that the control of the screw conveyor 51 is important to the influence of engineering quality.

Specifically, screw conveyor 51 includes an outer sleeve 511, a screw shaft 512, a screw drive unit 513, a gate 514, and a tapping section 515. The outer sleeve 511 is used as a slag discharging channel, the front end of the outer sleeve 511 is fixed on the back of the front shield partition board, the screw shaft 512 is positioned inside the outer sleeve 511, the front end of the screw shaft penetrates through the reserved hole of the front shield partition board and is deep into the soil bin, the screw driving unit 513 is fixed on the tail of the outer sleeve 511 and is used for driving the screw shaft 512 to rotate, a gate 514 is arranged between the tail end of the outer sleeve 511 and the slag discharging section 515, and the gate 514 is used for opening or closing the slag discharging channel. Tapping section 515 is used to direct the flow of slag into slag car 52. A slag receiving position and a waiting position beside the slag receiving position are arranged below the slag discharging section 515.

As shown in fig. 4, slag car 52 includes a slag bucket 521, a chassis 522, wheels 523, a slag car drive unit 524, a slag car controller 525, and a cable drum 526. The slag bucket 521 is square and is used for storing slag soil, the bottom of the slag bucket is provided with an ear seat, and the slag bucket is connected with the chassis 522 through a pin shaft. Four wheels 523 are arranged at the lower part of the chassis 522, a slag car driving unit 524 is arranged at the rear part of the chassis, and the slag car driving unit 524 drives the wheels 523 to walk along the slag car rail 53. The slag car tracks 53 are arranged at the bottom of the pipe joint 7 in parallel, and the central line of the slag car tracks is positioned in the longitudinal symmetrical plane of the tunnel. The slag car rail 53 is arranged from below the tapping section 515 to the originating well, the slag car rail 53 at the originating well being designed to be removable, which section of rail needs to be removed quickly when a new pipe section of the ring is lowered. Slag car controller 525 is used for controlling slag car driving unit 524, slag car controller 525 is located at the right side of the rear portion of chassis 522, and cable drum 526 is located at the left side of the rear portion of chassis 522 for winding and unwinding cables during traveling.

In this embodiment, the slag car 52 includes two slag cars, namely a first slag car 52a and a second slag car 52b, and the positions of the two slag cars 52 when in use are respectively a slag receiving position below the screw conveyor 51, and a waiting position beside the slag receiving position, and the slag car switching device is used for driving the slag car positioned at the waiting position to move to the slag receiving position. In this embodiment, the slag car switching device includes a rail hanging system 54, as shown in fig. 2-6, the rail hanging system 54 includes a top rail 541 fixed on a tunnel top pipe joint 7 and a slag car hanging machine 543, where the slag car hanging machine 543 can move back and forth along the top rail 541, and a connection structure for connecting the slag car 52 is provided on a hanging rope of the slag car hanging machine 543, in this embodiment, the slag car hanging machine is provided with a hanging hook, and the slag car 52 is provided with a hanging lug, and of course, the connection structure may also be other structures, such as a pin, a sucker, and the like. The slag car hoist 543 is configured to hoist the slag car 52 and move above the slag receiving site. The wellhead crane 11 is used to transport the slag hopper 521 from the bottom of the originating well to the ground slag pool and assist the slag hopper 521 in dumping the slag.

Specifically, in this embodiment, the top rail 541 is fixed on the pipe section 7 by the pressing plate 542, the top rail 541 is an "i" shaped rail, the slag car crane 543 is connected to rail holding wheels, the rail holding wheels clamp two sides of the top rail 541 and walk along the two sides, and the rail holding wheels are also connected to driving motors, so that active walking of the slag car crane 543 is realized.

As shown in fig. 3 and 6, the head rail 541 in the present embodiment is arranged on both left and right sides of the tunnel pipe joint 7, and is bilaterally symmetrical. The left and right head rails 541 are each provided with a slag car hoist 543. The top rail 541 is provided with two slag car cranes 543 arranged in front and back, and the front and back slag car cranes 543 are connected by a rigid connection plate 544, so that the synchronism of the front and back slag car cranes is ensured. In addition, the front and rear ends of the top rail 541 are further provided with a limiting structure, specifically a limiting block 545. The limiting block 545 limits the forward and backward movement range of the slag car crane 543, prevents the slag car crane 543 from accidentally falling off, and ensures safety. In this embodiment, the distance between the left and right top rails 541 is not smaller than the distance between the slag car rails on both sides of the bottom of the tunnel, i.e., the distance between the top rails 541 is not smaller than the wheel distance between the wheels 523 on both sides.

The working steps of the slag discharging system of the embodiment are as follows:

s1: after the previous ring pipe joint 7 is pushed in, a new ring pipe joint 7 is lowered, various pipelines and slag car tracks 53 are lengthened and connected, a main driving system 3 is started to drive an excavation system 1 to excavate, and a pushing system 6 pushes the pipe joint 7 and a shield system 2 to advance.

S2: the first slag car 52a walks along the slag car track 53 to a slag receiving position below the slag tap 515, the gate 514 is opened, the screw shaft 512 starts to rotate, and slag flows into the first slag car 52a along the slag tap 515;

s3: in the process of receiving slag by the first slag car 52a, the second slag car 52b walks to a waiting position behind the first slag car 52a along the slag car track 53, and the slag car crane 543 moves to the upper side of the second slag car 52b along the top rail 541 for standby;

s4: when the first slag car 52a is about to be filled with the hopper, the slag car lifting machine 543 drops a lifting hook, the lifting hook hooks the lifting lug of the slag car 52b, and the slag car 52b is lifted;

s5: slag car lifting machine 543 lifts slag car 52b to travel along top rail 541 to right above slag car number one 52a, at which time slag in slag section 515 flows into slag bucket 521 of slag car number two;

s6: the first slag car 52a walks to the originating well along the slag car track 53, the slag hopper 521 is separated from the chassis 522, the wellhead crane 11 lifts the slag hopper 521 to be transported to the slag pool, then the slag is poured, and then the slag is lifted into the originating well to be connected with the chassis 522 and run to a waiting position for standby;

s7: meanwhile, after the first slag car 52a is driven away from the slag receiving position, the second slag car 52b is lowered onto the slag car rail 53 by the slag car crane 543, and the lifting hook is released;

s8: the slag car hoist 543 is moved to a standby position and stands by.

In the embodiment, the slag car switching device (the rail hanging system) and the slag car are matched for working, uninterrupted slag discharge is realized, the screw conveyor does not need to be frequently started and stopped, meanwhile, when one slag car receives slag, the slag car with a full bucket can synchronously carry out slag outward, namely, uninterrupted slag discharge from a tunnel to the outside of an originating well is realized, and the tunneling slag discharge efficiency of the push bench is improved.

In addition, the slag car lifting machine 543 lifts the slag car from the position right above the slag waiting position to downwards and can directly receive the slag, so that the slag car switching efficiency is improved. Meanwhile, the rail hanging system occupies less space on the lower parts of the left side and the right side of the tunnel, and arrangement connection of other equipment is not affected.

The slag tapping system according to embodiment 2 of the present utility model differs from embodiment 1 mainly in that: in embodiment 1, the slag car switching device includes a rail suspension system. In this embodiment, as shown in fig. 7, the slag car switching system includes a rotary platform 12, where the rotary platform 12 is provided with a slag receiving position and a waiting position, and a track connected with the slag car track, and the rotary platform 12 rotates 180 ° to switch the slag receiving position and the waiting position, so as to implement uninterrupted slag tapping. The specific principle is as follows: when the first slag car is full of the slag receiving station, the rotary platform rotates 180 degrees, the second no-load slag car enters the slag receiving station from the waiting station, the first slag car enters a slag car track of a pipe joint along a track of the rotary platform, so that slag soil is transported to the ground, and an original path returns to the rotary platform to wait for the station to stand by after slag pouring. In the whole rotation process, the first slag car and the second slag car can bear slag soil which is not in neutral gear and falls down in a slag-discharging section, and a gate of the screw conveyor is not required to be closed.

The slag tapping system according to embodiment 3 of the present utility model differs from embodiment 1 mainly in that: in embodiment 1, the slag car switching device includes a rail suspension system. In this embodiment, the slag car switching device includes a lifting platform that can travel along the bottom of the tunnel, which can grab the slag car and move the slag car in the waiting position to the slag receiving position.

The slag tapping system according to embodiment 4 of the present utility model differs from embodiment 1 mainly in that: in embodiment 1, slag car 52 is a rail slag car. In this embodiment, the slag car may be a rubber-wheel slag car, and in particular, may be a rubber wheel arranged in an "eight" shape when used in a circular section tunnel, and may be a rubber wheel arranged horizontally when used in a rectangular tunnel in this embodiment.

The slag tapping system according to embodiment 5 of the present utility model differs from embodiment 1 mainly in that: in embodiment 1, the rail hanging system comprises a top rail on the left side and the right side, and two slag car cranes are arranged in front of and behind the top rail, so that multi-point support for slag cars can be formed, and the single crane is prevented from bearing excessive load. In this embodiment, only one top rail is arranged, and only one slag car crane is also arranged, and at this time, a plurality of branch crane ropes can be arranged on the slag car crane ropes, so that the slag car can be stably hoisted.

The slag tapping system according to the utility model according to embodiment 6 differs from that according to embodiment 1 mainly in that: in the embodiment 1, the top rail is an I-shaped rail, so that rail stock of a tunneling construction site can be utilized, and the cost is low. In this embodiment, the top rail may be a box rail beam, and a guide groove is formed below the box rail beam, and the travelling wheel of the slag car crane travels inside the box rail beam and moves along the guide groove.

The slag tapping system according to the utility model according to embodiment 7 differs from embodiment 1 mainly in that: in example 1, two slag cars were included. In this embodiment, three or more slag cars may be included.

The slag tapping system according to embodiment 8 of the present utility model differs from embodiment 1 mainly in that: in example 1, the distance between the left and right top rails is not smaller than the tread of the slag car wheel. In this embodiment, the distance between the head rails on the left and right sides may be smaller than the tread of the slag car wheel.

The slag tapping system according to the utility model according to embodiment 9 differs from embodiment 1 mainly in that: in embodiment 1, the slag conveying means comprises a screw conveyor. In the embodiment, the lower part of the screw conveyor is further connected with a belt conveyor or the belt conveyor is connected inside the main machine, and a residue soil receiving position and a waiting position are arranged below the belt conveyor.

The specific embodiment of the push bench comprises:

the push bench includes the push bench described in any one of embodiments 1 to 9 of the slag discharging system described above, and will not be described in detail herein.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The slag discharging system comprises a slag conveying device for conveying slag from a main machine outwards and at least two slag trucks, wherein a slag receiving position and a waiting position beside the slag receiving position are arranged below the slag conveying device.

2. The slag system of claim 1, wherein the slag car switching device comprises a rail suspension system including a head rail for positioning at the top of the tunnel and a slag car hoist movable back and forth along the head rail, a hoist rope of the slag car hoist having a connection structure for hoisting the slag car.

3. The slag tapping system according to claim 2, wherein the top left and right sides of the tunnel are provided with said head rail, and wherein the head rails on the left and right sides are provided with said slag car crane.

4. A slag tapping system according to claim 3, wherein the head rail is provided with at least two slag car cranes arranged one behind the other.

5. The slag tapping system according to claim 4, wherein the front and rear adjacent slag car cranes are connected by rigid connectors.

6. Slag tapping system according to any one of claims 3-5, wherein the distance between the left and right top rails is not smaller than the tread of the left and right road wheels of the slag car.

7. Slag tapping system according to any one of claims 2-5, wherein the top rail is further provided with a limit structure for limiting the range of movement of the slag car crane back and forth.

8. The tapping system according to claim 7, wherein the limit structure is provided at both front and rear ends of the head rail.

9. The slag tapping system as set forth in any one of claims 2-5, wherein the head rail is an "i" shaped rail, and wherein the slag car crane is connected to a rail holding running gear.

10. A push bench comprising a slag tapping system according to any one of claims 1-9.