Screw conveyer for shield tunneling machine

Abstract

The utility model provides a spiral conveyor for a shield tunneling machine. The spiral conveyor comprises a machine shell, a shaftless spiral body, a driving device and a liquid injection atomization device. The shaftless spiral body is rotatably arranged in the conveying cavity of the machine shell and is in transmission connection with the driving device; the multiple liquid injection atomization devices are evenly arranged on the machine shell in the axial direction parallel to the shaftless spiral body and used for spraying atomized liquid additives into the conveying cavity, the contact area between the liquid additives and the muck is increased, the reaction speed is increased, the atomized liquid additives can be rapidly mixed with the muck when the gushing phenomenon is dealt with, and the effect that the muck flows out is achieved is achieved. And an effective water stop barrier is formed. In addition, when the shaftless spiral body rotates, muck containing large blocks of obstacles such as large blocks of concrete or boulder pebbles can be conveyed, mixing of the liquid additive and the muck can be promoted through stirring, and the mixing efficiency of the liquid additive and the muck is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine technical field especially is related to a spiral conveyor for shield machine. BACKGROUND

[0002] The spiral conveyor is one of the key components of the shield machine, and its design aims to realize the functions of discharging the muck in the soil chamber of the shield machine and balancing the earth pressure.

[0003] The existing part of the spiral conveyor for the shield machine adopts the shaftless spiral conveyor to avoid the jamming problem between the traditional shafted spiral blade and the shaft body, so as to improve the conveying stability and efficiency.

[0004] The applicant finds that the prior art at least has the following technical problems:

[0005] When the gushing phenomenon occurs in the construction process, the liquid additive is usually directly injected into the soil chamber, and the muck is mixed by relying on the natural diffusion, the reaction speed is slow, and the water stopping effect lags behind.

[0006] Although the shaftless spiral conveyor avoids the jamming problem, it lacks auxiliary means such as liquid additive injection and atomization, so that when the gushing occurs, the mud and water are sprayed out of the spiral conveyor outlet in large quantities, the water cannot be stopped quickly, the construction environment is deteriorated, and there is a safety hazard.

[0007] In addition, the existing conveyor lacks a visual window on the machine shell, and when the conveyor fails, it can only be stopped and disassembled for inspection, which is time-consuming and laborious and has low efficiency.

[0008] For example, application No. CN201910917961.1 discloses a series type double screw conveyor device and a conveying method thereof.

[0009] Therefore, the utility model is proposed. UTILITY MODEL CONTENT

[0010] The utility model aims to provide a spiral conveyor for shield machine to solve the technical problems that the spiral conveyor for shield machine lacks auxiliary means such as liquid additive injection and atomization, so that when the gushing occurs, the mud and water are sprayed out of the spiral conveyor outlet in large quantities, the water cannot be stopped quickly, the construction environment is deteriorated, and there is a safety hazard in the prior art. The preferred technical solutions in many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0011] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0012] The utility model provides a kind of screw conveyor for shield machine, including shell, shaftless spiral body, driving device and liquid injection atomization device;The shell has the inclined upward arrangement conveying cavity, the inlet of the conveying cavity is communicated with soil bin, and its outlet is communicated with subsequent conveying device;The shaftless spiral body is rotatably arranged in the conveying cavity, and its lower end extends into soil bin, and is drivingly connected with the driving device, and the residual earth in soil bin is transmitted to subsequent conveying device along the conveying channel of the shaftless spiral body by rotating;The liquid injection atomization device is multiple in number, and is evenly arranged on the shell along the axial direction parallel to the shaftless spiral body, for injecting atomized liquid additive into the conveying cavity.

[0013] Preferably, the liquid injection atomization device includes a liquid injection pipe, a liquid additive storage tank, and an atomizing nozzle. The atomizing nozzle is in communication with the liquid additive storage tank through the liquid injection pipe. A power pump is arranged on the liquid injection pipe. The liquid outlet direction of the atomizing nozzle is towards the conveying cavity. A receiving groove is formed on the shell for mounting the atomizing nozzle.

[0014] Preferably, the shaftless spiral blade of the shaftless spiral body is an arc panel. An edge guard plate is arranged on the outer arc surface of the arc panel to match the curvature of the arc panel. An alloy layer resistant to corrosion and wear is arranged at the welding joint of the arc panel and the edge guard plate. Anti-slip stripes are arranged on the arc panel.

[0015] Preferably, the diameter of the shaftless spiral blade is 900 mm, and the pitch is 1100 mm.

[0016] Preferably, the driving device includes a reversible motor. The reversible motor is arranged on the end of the shell away from the soil bin and is drivingly connected with the shaftless spiral body through a transmission assembly. The reversible motor is electrically connected with the control module.

[0017] Preferably, the control module is further provided with a flow rate sensor. The flow rate sensor is arranged on the inner wall of the conveying cavity and is electrically connected with the control module to detect the flow rate of the residual earth.

[0018] Preferably, the control module is further provided with an earth outlet gate. The earth outlet gate is arranged on the outlet of the shell and is connected with the shell through a hydraulic jack to open or close the outlet of the shell. The hydraulic jack is electrically connected with the control module.

[0019] Preferably, the control module is further provided with a temperature sensor. The temperature sensor is arranged at the outlet position of the conveying cavity and is electrically connected with the control module to monitor the temperature of the residual earth at the outlet position.

[0020] Preferably, the machine shell is provided with installation grooves, and the inspection windows are detachably connected to the installation grooves through connecting assemblies.

[0021] Preferably, the machine shell is provided with installation grooves, and the inspection windows are detachably connected to the installation grooves through connecting assemblies.

[0022] The preferred technical solutions of the utility model can at least produce the following technical effects:

[0023] The utility model discloses a shield machine screw conveyer, including the machine shell, the shaftless spiral body, the drive arrangement and the injection liquid atomization device, the machine shell has the conveying chamber that sets up obliquely upwards, and the import of conveying chamber is linked together with the soil bin, and its export is linked together with the subsequent conveying device, the shaftless spiral body rotatable type sets up in conveying chamber, and is transmission connection with drive arrangement, and through the rotation, the muck in soil bin is transmitted to the subsequent conveying device along the conveying channel of shaftless spiral body, the injection liquid atomization device includes injection liquid part and atomization part, and the number of injection liquid part is multiple, and evenly arranged on the machine shell along the axial direction parallel to the shaftless spiral body, is used for injecting the atomized liquid additive in conveying chamber, and the atomization part sets up on the liquid outlet of injection liquid part.

[0024] The utility model discloses a shield machine screw conveyer, including the machine shell, the shaftless spiral body, the drive arrangement and the injection liquid atomization device, the machine shell has the conveying chamber that sets up obliquely upwards, and the import of conveying chamber is linked together with the soil bin, and its export is linked together with the subsequent conveying device, the shaftless spiral body rotatable type sets up in conveying chamber, and is transmission connection with drive arrangement, and through the rotation, the muck in soil bin is transmitted to the subsequent conveying device along the conveying channel of shaftless spiral body, the injection liquid atomization device includes injection liquid part and atomization part, and the number of injection liquid part is multiple, and evenly arranged on the machine shell along the axial direction parallel to the shaftless spiral body, is used for injecting the atomized liquid additive in conveying chamber, and the atomization part sets up on the liquid outlet of injection liquid part. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0026] Fig. 1 is a structural schematic view of a screw conveyor for a shield tunneling machine provided by the utility model;

[0027] Fig. 2 is a structural schematic view of a screw conveyor for a shield tunneling machine provided by the utility model is assembled on the shield tunneling machine;

[0028] Fig. 3 is a partial structural schematic view of a shaftless spiral body of a screw conveyor for a shield tunneling machine provided by the utility model.

[0029] In the drawing:

[0030] 1, the shell; 101, the conveying cavity; 102, the inlet; 103, the outlet; 2, the shaftless spiral body; 201, the cambered plate; 2011, the antiskid stripe; 202, the edge guard plate; 3, the reversible motor; 4, the transmission assembly; 5, the atomizing nozzle; 6, the temperature sensor; 7, the maintenance window; 701, the transparent observation window; 8, the hydraulic jack; 9, the gate of the unearthed; 10, the flow rate sensor; 11, the shield tunneling machine; 12, the soil bin; 13, the subsequent conveying device. DETAILED DESCRIPTION

[0031] To make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making the creative labor belong to the scope of the utility model.

[0032] As Figs. 1-3 shown, the utility model provides a kind of screw conveyor for shield tunneling machine, including shell 1, shaftless spiral body 2, drive device and liquid injection atomizing device;Shell 1 has the conveying cavity 101 of setting up obliquely upwards, the inlet 102 of conveying cavity 101 is communicated with soil bin 12, and its outlet 103 is communicated with subsequent conveying device 13;Shaftless spiral body 2 is rotatably arranged in conveying cavity 101, and its lower end extends into soil bin 12, and is drivingly connected with drive device, and by rotating, the muck in soil bin 12 is transmitted to subsequent conveying device 13 along the conveying passage of shaftless spiral body 2 upwards;The number of liquid injection atomizing device is multiple, and is evenly arranged on shell 1 along the axial direction parallel to shaftless spiral body 2, for injecting atomized liquid additive into conveying cavity 101.

[0033] Through the cooperation of the shell 1, the shaftless spiral body 2, the driving device and the liquid injection atomization device, multiple liquid injection atomization devices are uniformly arranged on the shell 1 along the axial direction of the shaftless spiral body 2, which are used to spray the atomized liquid additive into the conveying cavity 101 to increase the contact area of the liquid additive with the slag and accelerate the reaction speed. In the case of dealing with the gushing phenomenon, the atomized liquid additive can quickly mix with the slag to form an effective water-stopping barrier. In addition, when the shaftless spiral body 2 rotates, it can not only transport the slag containing large pieces of concrete or large pieces of obstacles such as floating stones, but also produce stirring effect on the slag through its spiral structure to promote the mixing of the liquid additive and the slag and improve the mixing efficiency of the liquid additive and the slag.

[0034] Further, the liquid injection atomization device can be uniformly arranged along the circumference of the shell 1.

[0035] As an optional embodiment, the liquid injection atomization device comprises a liquid injection pipe, a liquid additive storage tank and an atomization nozzle 5. The atomization nozzle 5 is in communication with the liquid additive storage tank through the liquid injection pipe, and a power pump is arranged on the liquid injection pipe. The liquid outlet direction of the atomization nozzle 5 is directed towards the conveying cavity 101. A receiving groove is formed on the shell 1 for mounting the atomization nozzle 5.

[0036] The liquid injection pipe is used to connect the liquid additive storage tank and the atomization nozzle to form a transmission channel for the liquid additive. The power pump is used to provide pressure to drive the liquid additive to flow in the transmission channel. The atomization nozzle 5 is used to atomize the liquid additive into fine particles.

[0037] Further, the atomization nozzle 5 is arranged downwardly inclined towards the direction of the soil bin 12, so that the liquid injection direction of the atomization nozzle 5 is inclined towards the direction of the shaftless spiral blade. The atomization port of the atomization nozzle 5 can be hiddenly arranged in the receiving groove, and since there is a certain gap between the edge of the shaftless spiral blade and the inner wall surface of the shell 1, the atomization nozzle 5 will not interfere with the shaftless spiral blade, so that the liquid additive sprayed from the atomization nozzle 5 can better contact with the slag, further improving the mixing effect.

[0038] The liquid additive includes the swelling agent or the modifier in the prior art, as long as it can realize the mixing with the slag to form an effective water-stopping barrier.

[0039] As an optional embodiment, the shaftless spiral blade of the shaftless spiral body 2 is an arc panel 201, an edge guard 202 matching the curvature of the arc panel 201 is arranged on the outer arc surface of the arc panel 201, and an alloy layer resistant to corrosion and wear is covered on the welded connection between the arc panel 201 and the edge guard 202. Anti-skid stripes 2011 are arranged on the arc panel 201.

[0040] Further, the arc panel 201 is made of NM550 wear-resistant steel material, which has high hardness, high strength and good wear resistance.

[0041] The edge guard 202 is made of alloy steel material and is used for protecting the edge of the arc panel 201.

[0042] Since the welding joint of the arc panel 201 and the edge guard 202 is relatively weak, covering an alloy layer with corrosion resistance and wear resistance on the welding joint can effectively improve the service life of the welding joint.

[0043] The setting of the anti-skid stripes 2011 can increase the contact area between the slag and the shaftless spiral blade, so that the shaftless spiral blade can push more slag for conveying under the same power consumption, and the working efficiency is greatly improved.

[0044] As an optional embodiment, the diameter of the shaftless spiral blade is 900 mm, and the pitch thereof is 1100 mm.

[0045] In this way, the shaftless spiral blade can cover a larger space range, and the material moves a larger distance in the axial direction, which can not only push more slag, but also discharge large block obstacles such as large block concrete or floating pebbles with a length of not more than 900 mm and a diameter of not more than 600 mm, so as to timely and effectively discharge possible large block obstacles, so that the conveying effect is best, the smooth construction is ensured, the risk of shutdown and equipment damage caused by problems such as blockage is reduced, and the device is suitable for various complex strata.

[0046] As an optional embodiment, the device further comprises a control module, the driving device comprises a reversible motor 3, the reversible motor 3 is arranged on the end of the casing 1 away from the soil bin 12 and is in transmission connection with the shaftless spiral body 2 through a transmission assembly 4, and the reversible motor 3 is in electrical connection with the control module.

[0047] The reversible rotation direction of the reversible motor 3 can make the direction of the material conveying by the shaftless spiral body 2 reversible, so that the flexibility, efficiency and convenience of conveying are greatly increased.

[0048] Since the material blockage is a common problem in the operation of the screw conveyor, the traditional method for processing blockage often needs to stop, disassemble the equipment, and then manually clean the blockage, which is time-consuming and laborious and has low efficiency. However, the screw conveyor of the utility model can utilize the reverse thrust of the shaftless spiral body 2 to quickly discharge the blockage by controlling the reversible motor 3 to rotate in the reverse direction, so that the blockage time is greatly shortened, and the problems such as shutdown caused by blockage are reduced.

[0049] It should be noted that the specific transmission connection relationship of the reversible motor 3, the transmission assembly and the shaftless spiral body 2 is prior art, and will not be described here.

[0050] As an optional implementation, the flow rate sensor 10 is arranged on the inner wall of the conveying cavity 101 and electrically connected with the control module, and is used to detect the flow rate of the muck.

[0051] The flow rate sensor 10 is used to monitor the flow rate of the muck in the conveying cavity 101 in real time, and to find the conveying abnormality in advance. When the monitored flow rate is lower than the preset threshold, the control module can timely issue an alarm to remind the operator to take corresponding measures to avoid the blockage.

[0052] As an optional implementation, the muck outlet gate 9 is arranged on the outlet 103 of the casing 1 and is connected with the casing 1 through the hydraulic jack 8, and is used to open or close the outlet 103 of the casing 1. The hydraulic jack 8 is electrically connected with the control module.

[0053] Further, the muck outlet gate 9 is arranged at the lower part of the upper end of the casing 1 and corresponds to the upper part of the feeding port of the subsequent conveying device 13.

[0054] The piston rod of the hydraulic jack 8 is connected with the muck outlet gate 9, and the muck outlet gate 9 is sealingly connected with the outlet 103 through the sealing assembly.

[0055] The hydraulic jack 8 controls the muck outlet gate 9 to perform the opening and closing actions to open or close the outlet 103 to control the discharge of the muck.

[0056] It should be noted that the specific structures of the hydraulic jack 8, the muck outlet gate 9 and the sealing assembly adopt the prior art, and will not be described here.

[0057] As an optional implementation, the temperature sensor 6 is arranged on the inner wall surface of the outlet 103 of the conveying cavity 101 and is electrically connected with the control module, and is used to monitor the temperature of the muck at the outlet 103.

[0058] The temperature sensor 6 is used to monitor the temperature of the muck at the outlet 103 of the conveying cavity 101 in real time. When the monitored temperature of the muck at the outlet 103 is higher than the preset threshold, it means that the material is blocked or frictionally overheated at the outlet 103. The control module can timely issue an alarm to remind the operator to take corresponding measures and stop the machine for inspection in time.

[0059] It should be noted that the specific circuit connection relationship between the reversible motor 3, the hydraulic jack 8, the flow rate sensor 10 and the temperature sensor 6 and the control module adopts the prior art, and will not be described here.

[0060] As an optional implementation, the maintenance window 7 has a transparent observation window 701, and the number of the maintenance window 7 is multiple and is arranged on the casing 1 in the axial direction parallel to the shaftless spiral body 2, for observing the internal condition of the conveying cavity 101.

[0061] Further, the number of the maintenance window 7 is three, and is arranged at the lower end, the middle and the upper end of the casing 1 respectively, so that the running state of the internal of the conveying cavity 101 at different positions of the screw conveyor can be directly observed without disassembly. Specifically, the top, the middle and the bottom wear conditions of the shaftless spiral blade and the conveying state of the material at the corresponding position and whether there is foreign matter jamming and other conditions can be synchronously observed through the transparent observation window 701, potential problems can be found in time, and the problem is prevented from further deterioration, so as to reduce the probability of equipment failure. In addition, the workers can add appropriate additives into the conveying cavity 101 through the liquid injection atomization device according to the changes of the geological and soil conditions and the observed flow condition of the muck.

[0062] When the screw conveyor fails, the transparent observation window 701 can help the maintenance personnel to quickly determine the fault position, that is, by observing the movement condition of the shaftless spiral body 2 and the material accumulation position, whether the shaftless spiral body 2 is damaged can be quickly judged without disassembly, the fault troubleshooting time is greatly shortened, and the maintenance efficiency is improved.

[0063] As an optional implementation, the casing 1 is provided with a mounting groove, and the maintenance window 7 is detachably connected with the mounting groove through a connecting assembly.

[0064] Further, the maintenance window 7 is connected with the mounting groove through a standardized connecting assembly such as a bolt or a hinge, a window structure supporting opening is formed, and the mounting groove is sealingly connected through a sealing ring.

[0065] It should be noted that the specific connection structure of the maintenance window 7 and the casing 1 adopts the prior art, which is not described in detail here.

[0066] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0067] In the description of the utility model, it is necessary to explain, unless otherwise stated, the meaning of "a plurality of" is two or more than two;The terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0068] In the description of the utility model, it is also necessary to explain that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, and can be detachably connected, or integrally connected;It can be mechanically connected, or electrically connected;It can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0069] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "one example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A screw conveyor for a tunnel boring machine, characterized in that, The device includes a housing, a shaftless spiral, a drive unit, and a liquid atomizing device. The housing has an upwardly inclined conveying chamber, the inlet of which is connected to a soil silo, and the outlet of which is connected to a subsequent conveying device. The shaftless spiral is rotatably disposed within the conveying chamber, with its lower end extending into the soil silo and connected to the drive unit. By rotating, it conveys the slag and soil in the soil silo upward along the conveying channel of the shaftless spiral to the subsequent conveying device. Multiple liquid atomizing devices are evenly arranged on the housing along an axial direction parallel to the shaftless spiral, and are used to inject atomized liquid additives into the conveying chamber.

2. The screw conveyor for a tunnel boring machine according to claim 1, characterized in that, The liquid injection atomizing device includes an injection pipe, a liquid additive storage tank, and an atomizing section. The atomizing section includes an atomizing nozzle, which is connected to the liquid additive storage tank through the injection pipe. A power pump is installed on the injection pipe. The liquid outlet direction of the atomizing nozzle faces into the delivery chamber. A receiving groove is provided on the housing for installing the atomizing nozzle.

3. A screw conveyor for a tunnel boring machine according to claim 1, characterized in that, The shaftless spiral blades of the shaftless spiral body are arc-shaped panels. An edge guard plate adapted to the curvature of the outer arc surface of the arc panel is provided. A corrosion-resistant and wear-resistant alloy layer is provided at the welded joint between the arc panel and the edge guard plate. Anti-slip stripes are provided on the arc panel.

4. A screw conveyor for a tunnel boring machine according to claim 3, characterized in that, The diameter of the shaftless helical blade is 900 mm, and its pitch is 1100 mm.

5. A screw conveyor for a tunnel boring machine according to claim 1, characterized in that, It also includes a control module, and the drive device includes a reversible motor, which is located at the end of the housing away from the soil chamber and is connected to the shaftless spiral body through a transmission component; the reversible motor is electrically connected to the control module.

6. A screw conveyor for a tunnel boring machine according to claim 5, characterized in that, It also includes a flow rate sensor, which is disposed on the inner wall of the conveying chamber and electrically connected to the control module, for detecting the flow rate of the slag.

7. A screw conveyor for a tunnel boring machine according to claim 5, characterized in that, It also includes an outlet gate, which is installed on the outlet of the machine casing and connected to the machine casing via a hydraulic jack, for opening or closing the outlet of the machine casing; the hydraulic jack is electrically connected to the control module.

8. A screw conveyor for a tunnel boring machine according to claim 5, characterized in that, It also includes a temperature sensor, which is located at the outlet of the conveying chamber and electrically connected to the control module, for monitoring the temperature of the slag at the outlet.

9. A screw conveyor for a tunnel boring machine according to claim 1, characterized in that, It also includes inspection windows, which have transparent observation windows; there are multiple inspection windows, which are evenly arranged on the housing along the axial direction parallel to the shaftless spiral, for observing the internal condition of the conveying chamber.

10. A screw conveyor for a tunnel boring machine according to claim 9, characterized in that, The housing has a mounting slot, and the inspection window is detachably connected to the mounting slot via a connecting component.

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