阅读说明：本技术 一种串联式双螺机输送装置及其输送方法 (Tandem type double-screw conveyor conveying device and conveying method thereof ) 是由 叶蕾 周罘鑫 郝凛然 王杜娟 郑康泰 贺开伟 李少辉 赵茜 卫宸瑜 庞培彦 高文 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种串联式双螺机输送装置及其输送方法,解决了盾构机螺旋输送机适应性差、检修困难的问题。本发明包括串联连接的一级螺旋输送机和二级螺旋输送机,所述一级螺旋输送机包括一级伸缩筒节,一级伸缩筒节内设有无轴螺旋轴,一级伸缩筒节的筒壁上设有双出渣门和出渣门；所述二级螺旋输送机包括二级螺机筒节,二级螺机筒节内设有复合式旋转轴,二级螺机筒节的筒壁上设有前部下渣门和后部下渣门,前部下渣门与设备皮带机相对应,后部下渣门与连续皮带机相对应。本发明可用于高埋深、高水压、存在大粒径卵石地层,能够实现高水压模式掘进,解决在高水压下存在的大粒径卵石输送问题,使用双螺旋输送机得盾构机施工成本低,施工效率高。(The invention discloses a tandem type double-screw conveyor conveying device and a conveying method thereof, which solve the problems of poor adaptability and difficult maintenance of a shield machine screw conveyor. The continuous-conveying type slag-removing device comprises a primary screw conveyor and a secondary screw conveyor which are connected in series, wherein the primary screw conveyor comprises a primary telescopic cylinder section, a shaftless screw shaft is arranged in the primary telescopic cylinder section, and a double slag-removing door and a slag-removing door are arranged on the cylinder wall of the primary telescopic cylinder section; the secondary screw conveyer comprises a secondary screw machine cylinder section, a combined type rotating shaft is arranged in the secondary screw machine cylinder section, a front slag discharging door and a rear slag discharging door are arranged on the cylinder wall of the secondary screw machine cylinder section, the front slag discharging door corresponds to the equipment belt conveyer, and the rear slag discharging door corresponds to the continuous belt conveyer. The invention can be used for high-buried depth, high-water-pressure stratum with large-particle-size pebbles, can realize high-water-pressure mode tunneling, solves the problem of large-particle-size pebble conveying under high water pressure, and has low construction cost and high construction efficiency by using the double-screw conveyor.)

1. The utility model provides a two screw conveyer of serial-type, includes series connection's one-level screw conveyer and second grade screw conveyer, its characterized in that: the primary screw conveyor comprises a primary telescopic cylinder section (3), a shaftless screw shaft (2) is arranged in the primary telescopic cylinder section (3), a double slag outlet door (7) and a slag outlet door (8) are arranged on the wall of the primary telescopic cylinder section (3), the double slag outlet door (7) corresponds to an equipment belt conveyor (18) arranged in the shield machine, and the slag outlet door (8) is communicated with the secondary screw conveyor; the secondary screw conveyor comprises a secondary screw machine cylinder section (11), a combined type rotating shaft (10) is arranged in the secondary screw machine cylinder section (11), a front slag discharging door (12) and a rear slag discharging door (16) are arranged on the wall of the secondary screw machine cylinder section (11), the front slag discharging door (12) corresponds to an equipment belt conveyor (18), the rear slag discharging door (16) corresponds to a continuous belt conveyor (19) arranged in the shield machine, and the equipment belt conveyor (18) corresponds to the continuous belt conveyor (19).

2. The tandem twin screw conveyor apparatus of claim 1, wherein: the one-level telescopic cylinder section (3) comprises an inner cylinder section (31) and an outer cylinder section (32), the inner cylinder section (31) is sleeved in the outer cylinder section (32), the lower part of the inner cylinder section (31) is connected with a shield body through a one-level joint bearing (1), the upper part of the inner cylinder section (31) is connected with the outer cylinder section (32) through a telescopic oil cylinder (33), the outer cylinder section (32) is connected with the assembling machine (21) through a positioning support device (5), a one-level driving device (6) is arranged on the outer cylinder section (32), and the one-level driving device (6) is connected with the shaftless screw shaft (2).

3. The tandem twin screw conveyor apparatus of claim 2, wherein: the inner shell ring (31) and the outer shell ring (32) are coaxially and obliquely arranged, the double slag discharging doors (7) are radially arranged on the wall of the one-level telescopic shell ring (3), the slag discharging doors (8) are axially arranged at the rear part of the one-level telescopic shell ring (3), and the slag discharging doors (8) are connected with the second-level screw machine shell ring (11) through second-level joint bearings (9).

4. the in-line double screw conveyor apparatus of claim 1 or 3, wherein: the secondary screw machine shell ring (11) is horizontally arranged, a secondary telescopic mechanism (15) and an auxiliary support (13) are arranged on the trailer (20), a main support (14) is arranged on the secondary telescopic mechanism (15), the main support (14) is fixedly connected with the secondary screw machine shell ring (11), and the auxiliary support (13) corresponds to the secondary screw machine shell ring (11).

5. The tandem twin screw conveyor apparatus of claim 4, wherein: the rear part of the secondary screw machine shell section (11) is provided with a central driving device (17), and the central driving device (17) is connected with the composite rotating shaft (10).

6. The tandem twin screw conveyor apparatus of claim 1 or 5, wherein: the front section of the composite rotating shaft (10) is a shaftless screw shaft, the rear section of the composite rotating shaft is a shaft screw shaft, the front slag discharge door (12) is arranged at the lower part of the secondary screw machine barrel section (11) corresponding to the shaftless screw shaft, and the rear slag discharge door (16) is arranged at the lower part of the shaft screw shaft corresponding to the shaft screw shaft.

7. the tandem twin screw conveyor apparatus of claim 6, wherein: the rear end of the equipment belt conveyor (18) is positioned above the front end of the continuous belt conveyor (19), and the rear lower slag door (16) is positioned behind the equipment belt conveyor (18).

8. A conveying method of a tandem type double-screw conveyor device is characterized by comprising the following steps: the method comprises the following steps:

S1: debugging the primary screw conveyor and the secondary screw conveyor to a normal state;

s2: when the water pressure is low, the primary screw conveyor is started, the secondary screw conveyor is stopped, the double slag discharging doors (7) of the primary screw conveyor are opened, the slag discharging door (8) at the tail part of the primary screw conveyor is closed, and slag soil or pebbles can be directly discharged onto the equipment belt conveyor (18) through the double slag discharging doors (7) and then discharged through the continuous belt conveyor (19);

S3: in the area with high water pressure, a series double-screw conveyor is used, a double slag outlet door (7) of the primary screw conveyor is closed, a slag outlet door (8) at the tail part of the primary screw conveyor is opened, a front slag outlet door (12) of the secondary screw conveyor is closed, a rear slag outlet door (16) of the secondary screw conveyor is opened, and slag or pebbles with small particle sizes are discharged onto a continuous belt conveyor (19) through the rear slag outlet door (16) of the secondary screw conveyor and are discharged through the continuous belt conveyor (19);

S4: in the steps S2 and S3, the size of the pebbles discharged by the primary screw conveyor is larger than that of the pebbles discharged by the secondary screw conveyor, if larger pebbles can pass through the front sections of the primary screw conveyor and the secondary screw conveyor in the tunneling process but can not pass through the rear section of the secondary screw conveyor, a slag discharging door (8) at the tail part of the primary screw conveyor is closed, a front slag discharging door (12) of the secondary screw conveyor is opened, and the jammed pebbles are discharged onto the equipment belt conveyor (18) through the front slag discharging door (12) in a positive and negative rotation or manual assistance mode of the secondary screw conveyor and then discharged through the continuous belt conveyor (19).

9. the method for conveying a tandem type twin ~ screw conveyor according to claim 8, wherein in steps S2 ~ S3, when the primary screw conveyor and the secondary screw conveyor are overhauled, the primary screw conveyor and the secondary screw conveyor have a telescopic function, the primary screw conveyor and the secondary screw conveyor are simultaneously withdrawn backwards through a telescopic oil cylinder (33) of the primary screw conveyor, a drawing door on a shield body is closed, water and soil in a soil bin are prevented from flowing into a tunnel, and the two ~ stage screw conveyor is separated in the tunnel.

Technical Field

The invention relates to the technical field of shield tunneling machines, in particular to a tandem type double-screw machine conveying device and a conveying method thereof.

Background

At present, underground spaces such as subway tunnels, diversion tunnels, river-crossing and sea-crossing tunnels at home and abroad are rapidly developed, and due to the influences of geographical positions and surrounding environments, part of tunnels are under geological conditions of high buried depth, high water pressure and large-particle-size pebbles, the traditional manual excavation cannot be carried out, the safety cannot be guaranteed, and the shield construction method is imperative. At present, in a non-full-section hard rock stratum, an earth pressure balance shield machine construction and a muddy water balance shield machine construction are commonly adopted in a shield construction method, and a shaftless screw conveyor is adopted in a conventional earth pressure balance shield machine, so that large-particle-size pebbles can be discharged, but the pressure bearing capacity is extremely low; the bearing capacity of the shaft type screw conveyer is improved compared with that of a belt type screw conveyer, but the bearing capacity is limited by the length of the screw conveyer, the bearing capacity is correspondingly limited, the slag discharging particle size of the shaft type screw conveyer with the same specification is far smaller than that of a shaft-free screw conveyer, and the conventional shield machine cannot be constructed under the conditions of high water pressure and large-particle-size pebbles due to the limitation of the screw conveyer; compared with the conventional earth pressure balance shield machine, the muddy water balance shield machine has poor stratum adaptability and high equipment cost, and due to the existence of the muddy water circulation system, the muddy water circulation system has high construction cost, low tunneling speed and difficult maintenance of the muddy water circulation system in the construction process.

The shield tunneling machine two-stage screw conveyor with the application number of 201810051002.1 effectively lengthens the length of the screw conveyor through the two screw conveyors, so that the phenomenon of gushing is avoided. However, the pebble feeding device has poor suitability for pebble feeding, is fixed in form and inconvenient to overhaul, and increases construction cost.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a conveying method of a tandem type double-screw conveyer, which solves the problems of poor adaptability and difficult maintenance of a shield machine screw conveyer in the prior art.

The technical scheme of the invention is realized as follows: a tandem type double-screw conveyer comprises a primary screw conveyer and a secondary screw conveyer which are connected in series, wherein the primary screw conveyer comprises a primary telescopic cylinder section, a shaftless screw shaft is arranged in the primary telescopic cylinder section, a double slag outlet door and a slag outlet door are arranged on the cylinder wall of the primary telescopic cylinder section, the double slag outlet door corresponds to an equipment belt conveyor arranged in a shield machine, and the slag outlet door is communicated with the secondary screw conveyer; the secondary screw conveyer comprises a secondary screw machine cylinder section, a combined type rotating shaft is arranged in the secondary screw machine cylinder section, a front slag discharge door and a rear slag discharge door are arranged on the cylinder wall of the secondary screw machine cylinder section, the front slag discharge door corresponds to the equipment belt conveyer, the rear slag discharge door corresponds to the continuous belt conveyer arranged in the shield machine, and the equipment belt conveyer corresponds to the continuous belt conveyer.

The first-stage telescopic cylinder section comprises an inner cylinder section and an outer cylinder section, the inner cylinder section is sleeved on the outer cylinder section, the lower portion of the inner cylinder section is connected with the shield body through a first-stage joint bearing, the upper portion of the inner cylinder section is connected with the outer cylinder section through a telescopic oil cylinder, the outer cylinder section is connected with the assembling machine through a positioning support device, a first-stage driving device is arranged on the outer cylinder section, and the first-stage driving device is connected with the shaftless screw shaft.

the inner shell ring and the outer shell ring are coaxially and obliquely arranged, the double slag discharging doors are radially arranged on the wall of the one-stage telescopic shell ring, the slag discharging doors are axially arranged at the rear part of the one-stage telescopic shell ring, and the slag discharging doors are connected with the second-stage screw machine shell ring through second-stage joint bearings.

The secondary screw machine shell ring level sets up, is equipped with secondary telescopic machanism and auxiliary stay on the trailer, is equipped with the main stay on the secondary telescopic machanism, main stay and secondary screw machine shell ring fixed connection, and the auxiliary stay is corresponding with the secondary screw machine shell ring.

And the rear part of the secondary screw machine shell section is provided with a central driving device, and the central driving device is connected with the composite rotating shaft.

The front section of the composite rotating shaft is a shaftless screw shaft, the rear section of the composite rotating shaft is a shaft screw shaft, the front slag discharging door is arranged at the lower part of the secondary screw machine cylinder section corresponding to the shaftless screw shaft, and the rear slag discharging door is arranged at the lower part of the shaft screw shaft corresponding to the shaft screw shaft.

the rear end of the equipment belt conveyor is positioned above the front end of the continuous belt conveyor, and the rear slag discharging door is positioned behind the equipment belt conveyor.

A method for conveying tandem double-screw conveyor devices comprises the following steps:

s1: debugging the primary screw conveyor and the secondary screw conveyor to a normal state;

S2: when the water pressure is low, the primary screw conveyor is started, the secondary screw conveyor is stopped, the double slag doors of the primary screw conveyor are opened, the slag door at the tail part of the primary screw conveyor is closed, and the muck or pebbles can be directly discharged onto the equipment belt conveyor through the double slag doors and then discharged through the continuous belt conveyor;

S3: in areas with high water pressure, a series double-screw conveyor is used, at the moment, a double slag door of a first-stage screw conveyor is closed, a slag door at the tail part of the first-stage screw conveyor is opened, a slag door at the front part of a second-stage screw conveyor is closed, a slag door at the rear part of the second-stage screw conveyor is opened, and slag soil or pebbles with small particle sizes are discharged onto a continuous belt conveyor through the slag door at the rear part of the second-stage screw conveyor and are discharged through the continuous belt conveyor;

S4: in steps S2 and S3, the size of the pebbles discharged by the primary screw conveyor is larger than the size of the pebbles discharged by the secondary screw conveyor, if larger pebbles can pass through the front sections of the primary screw conveyor and the secondary screw conveyor in the tunneling process but cannot pass through the rear section of the secondary screw conveyor, the slag discharging door at the tail of the primary screw conveyor is closed, the front slag discharging door of the secondary screw conveyor is opened, and the pebbles blocked by the secondary screw conveyor are discharged onto the equipment belt conveyor through the front slag discharging door in a positive and negative rotation or manual assistance mode, and then are discharged through the continuous belt conveyor.

in step S2 ~ S3, when overhauing one-level screw conveyer and second grade screw conveyer, one-level screw conveyer and second grade screw conveyer possess flexible function, through one-level screw conveyer' S flexible hydro-cylinder, withdraw from one-level screw conveyer and second grade screw conveyer backward simultaneously, close the pull door on the shield body, guarantee soil and water can not flow into the tunnel in the soil storehouse, realize splitting two-stage screw conveyer in the tunnel.

The invention has the following beneficial effects: 1. the primary screw conveyor is provided with the telescopic inner and outer cylinder sections, and the secondary screw conveyor is provided with the external telescopic supporting mechanism, so that the simultaneous telescopic function of the primary screw conveyor and the secondary screw conveyor can be realized, the applicability is good, and the adjustment is easy; 2. the method can be applied to tunnel sections (both high water pressure and low water pressure sections), and only a first-stage screw conveyor is used for deslagging at low water pressure, so that the energy consumption, the grease consumption, the operation difficulty and the like are reduced; 3. the device can be used for the stratum with anhydrous cobbles, and realizes slag discharge only by a first-stage screw conveyor; 4. the device can be used for both cobble and high-water-pressure stratum, slag can be discharged through the double-screw conveyer, if the cobble can pass through the front-end shaftless screw shaft of the primary screw conveyer and the front-end shaftless screw shaft of the secondary screw conveyer, the slag discharging door at the tail part of the primary screw conveyer can be closed, the front slag discharging door of the secondary screw conveyer is opened, and the cobble with large particle size is discharged to the equipment belt conveyer through the front slag discharging door of the secondary screw conveyer by the forward and reverse rotation of the screw shaft of the secondary screw conveyer; 5. the secondary screw conveyor driving device adopts tail center driving, so that other components can be effectively arranged in a saved space, and adopts a joint bearing to reduce the overturning moment generated by the horizontal rotation of the screw shaft, so that the service life of the driving device is prolonged; 6. when the single-screw conveyor is used, the muck is conveyed to the continuous belt conveyor through the equipment belt conveyor, and then the muck is conveyed to the outside of the tunnel. The invention can be used for strata with high burial depth, high water pressure and large-particle-size pebble, not only can realize high water pressure mode tunneling, but also can solve the problem of large-particle-size pebble conveying under the high water pressure, and the shield machine using the double-screw conveyor not only has low construction cost, but also greatly improves the construction efficiency.

drawings

In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

fig. 1 is a schematic view of the overall structure of the present invention.

fig. 2 is a partially enlarged view of a portion a in fig. 1.

FIG. 3 is a schematic view of a shaftless screw shaft structure.

Fig. 4 is a schematic structural diagram of a composite rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.