CN114135310A

CN114135310A - Anti-surging screw conveyor

Info

Publication number: CN114135310A
Application number: CN202111413233.0A
Authority: CN
Inventors: 翟乾智; 曾垂刚; 刘常利; 刘继强; 张�浩; 刘恒; 周学彬; 杨振兴; 李宏波; 张占胜; 吕乾乾; 王发民; 孙飞祥; 张继超
Original assignee: State Key Laboratory of Shield Machine and Boring Technology; China Railway Tunnel Group Yichu Co Ltd; China Railway South Investment Group Co Ltd
Current assignee: State Key Laboratory of Shield Machine and Boring Technology; China Railway Tunnel Group Yichu Co Ltd; China Railway South Investment Group Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-04
Anticipated expiration: 2041-11-25
Also published as: CN114135310B

Abstract

The invention relates to the technical field of shield construction, in particular to an anti-surging spiral conveyor which comprises an arc-shaped spiral machine barrel arranged on the periphery of a spiral blade, wherein the spiral machine barrel comprises a plurality of buffer cavities which are sequentially and continuously connected, each buffer cavity is respectively composed of a contraction section and an expansion section, and a slag discharging hopper of the spiral machine barrel is communicated with the last expansion section. The invention can realize self-impact slag discharge of the muck by shunting and changing the flow line of the muck, can lead a part of muck to flow along the inner edge of the buffer cavity, shunts a part of muck, mixes the shunted muck with the original muck when the shunted muck flows to the outlet position of the expansion section, changes the flow direction of the original muck, and plays a role of preventing the muck from flowing too fast by combining with the helical blade. Play the instantaneous intensity that reduces a screw conveyer section of thick bamboo and slag tap, avoided the screw conveyer body to gush, the time of a extension screw conveyer section of thick bamboo slag tap ensures that the screw conveyer body operation process of slagging tap evenly slags tap.

Description

Anti-surging screw conveyor

Technical Field

The invention relates to the technical field of shield construction, in particular to an anti-surging spiral conveyor.

Background

With the gradual maturity of shield technology, subway construction has been applied to shield machines necessarily. The adaptability of the shield machine equipment becomes an important influence factor for determining the shield tunneling speed. Wherein the screw conveyer plays the decisive equipment of control soil storehouse pressure, regulation volume of coming out soil. In the past, when a shield is used for tunneling in a high water-rich stratum, a fault and a karst stratum, the pressure control of a shield soil bin is very difficult due to the high water pressure state of the stratum, and the gushing event of a screw conveyor body occurs occasionally when the shield discharges slag, so that the slag falling of the slag in a working area of a tunnel is very easy to cause and the safety of constructors is threatened.

When the shield is tunneled in water-rich strata such as high water-rich strata, faults, karst caves and the like, the screw machine directly gushes out high-pressure water through the screw machine cylinder in the slag discharging process due to the defect of self straight-cylinder design, so that the shield operation area is polluted, and the safety of constructors is threatened. Therefore, in order to avoid the gushing accident of the spiral conveyer body, the screw machine cylinder capable of adaptively adjusting the flow direction and changing the flow direction is provided, and the gushing of the spiral conveyer body can be prevented and the uniform slag discharge of the screw machine is also ensured by utilizing the self flow characteristic of the slag soil.

Disclosure of Invention

The invention aims to solve the problems that the traditional screw conveyor is easy to generate spewing and the slag is not uniform, and provides a novel spewing prevention screw conveyor which divides flow through a buffer cavity and changes the flow line of slag soil to enable the slag soil to realize self-impact slag discharging.

The specific scheme of the invention is as follows:

the utility model provides a prevent spouting formula screw conveyer, is including establishing at helical blade outlying arc spiral shell barrel, the spiral shell barrel includes a plurality of consecutive buffers that link to each other in proper order, and every buffer comprises contraction section and expansion section respectively, the fill of slagging tap and the last expansion section intercommunication of spiral shell barrel.

Preferably, the angle between the tangential direction of the outlet of the expansion section and the screw axis is 70-100 degrees.

The invention has the beneficial effects that:

1. according to the invention, the buffer cavity is arranged, so that the flow line of the muck can be divided and changed, the muck is discharged in a self-impact manner, and the problems of easy gushing and uneven slag discharge of the traditional screw machine are solved. The entrance part of cushion chamber is the shrink section, can let partly dregs flow along the inward flange of cushion chamber, shunts partly dregs, and the exit part of cushion chamber is the expansion section, and the tangential direction of expansion section export and the angle between the spiral axis are 70-100, mixes with original dregs when shunting dregs flow to expansion section exit position, changes the flow direction of original dregs, combines helical blade to play the function that prevents that the dregs from flowing too fast.

2. The buffer cavity is composed of the contraction section and the expansion section, and the slag soil stored in the space of the buffer cavity is slowly discharged under the action of the helical blades, so that the instant intensity of slag discharging of the screw machine cylinder is reduced, the gushing of the screw conveyor body is avoided, the slag discharging time of the screw machine cylinder is prolonged, and the uniform slag discharging in the slag discharging process of the screw conveyor body in operation is ensured.

Drawings

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

FIG. 2 is a schematic structural view of a screw barrel;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic structural view of the flow direction of the dregs;

the reference numbers in the figures are: 1 screw conveyer body, 2 drive arrangement, 3 slag hopper, 4 helical blade, 5 spiral shell axles, 6 cushion chambers, 7 expansion sections, 8 spiral shell machine section of thick bamboo, 9 contraction sections.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1

The utility model provides a prevent gushing formula screw conveyer, as shown in fig. 1 to 4, including establishing at the peripheral arc spiral shell barrel 8 of helical blade 4, spiral shell barrel 8 includes a plurality of consecutive buffer chambers 6 in proper order, and every buffer chamber 6 comprises contraction section 9 and expansion section 7 respectively, can set up multiunit buffer chamber 6 according to the different multiunit of nature of ground body, and spiral shell barrel 8's slag hopper 3 links to each other with last expansion section 7. The shield constructs when the tunnelling in high water pressure stratum, cushion chamber 6 has formed the place of storing dregs, get into by shrink section 9, flow out by expansion section 7, because 7 open area of expansion section are too big among the dregs flow process, can cause the mobility of dregs to reduce indirectly, and the design of shrink section 9 can let partly dregs flow along the inward flange of spiral shell barrel 8, reposition of redundant personnel partly dregs, make the volume of slagging tap reduce, and prolong the time of slagging tap, make the slow discharge spiral shell barrel 8 of dregs, can reduce the instantaneous intensity that spiral conveyer body 1 slagging tap, can effectively reduce the effect of intensity and the flow that gushes, can ensure evenly slagging tap at spiral conveyer body 1 operation slagging tap in-process simultaneously, also avoided spiral conveyer body 1 to gush.

Example 2

A blowout preventing screw conveyor is different from embodiment 1 in that, as shown in FIGS. 1 to 4, the angle between the tangential direction of the outlet of the expanding section 7 and the screw axis 5 is 70 to 100 degrees. The dregs of reposition of redundant personnel flow when 7 exit positions of expansion section and original dregs mix, because the tangential direction of 7 exports of expansion section and the angle between the spiral shell axle 5, mix the dregs can change the flow direction of original dregs according to the tangential direction of opening the section export and the angle between the spiral shell axle 5 under the effect of self velocity of flow, make the dregs after mixing flow to between the screw machine blade, the effect of blockking that combines helical blade 4 plays and prevents that the dregs from flowing too fast function, simultaneously because dregs flow to helical blade 4, the effect of gathering the dregs has also been played.

The working principle of the invention is as follows: the anti-surging screw conveyor mainly utilizes the shunting and partial slag redirection functions of the buffer cavity 6 to realize the anti-surging function of the screw conveyor body 1. The buffer cavity 6 can be provided with a plurality of groups according to the stratum condition, the best soil output is realized, the inlet part of the buffer cavity 6 is in a contraction shape, the diameter of the inlet part is smaller than that of the expansion section 7, and part of muck can flow along the inner edge of the buffer cavity 6 to shunt part of muck. The outlet part of the buffer cavity 6 is the outlet direction of the expansion section 7, the angle between the tangential direction of the outlet of the expansion section 7 and the screw shaft 5 is 70-100 degrees, the shunted muck flows to the outlet of the expansion section 7 and is mixed with the original muck, the flow direction of the original muck is changed, the mixed muck flows into the action space of the helical blade 4, and the function of preventing the muck from flowing too fast is achieved by combining the helical blade 4. Simultaneously, the buffer cavity 6 is divided into a storage space with a contraction section 9 and an expansion section 7, can store partial muck, can ensure uniform slag discharge in the slag discharge process of the operation of the spiral conveyor body 1, and also avoids the spewing of the spiral conveyor body 1.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that certain features may be replaced by equivalents thereof; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a prevent spouting formula screw conveyer, its characterized in that is including establishing at helical blade (4) outlying spiral shell barrel (8), spiral shell barrel (8) include a plurality of consecutive buffers (6) in proper order, and every buffer (6) comprise contraction section (8) and expansion section (7) respectively, the fill (3) of slagging tap of spiral shell barrel (8) are linked together with last expansion section (7).

2. A blowout preventing screw conveyor according to claim 1, wherein: the angle between the tangential direction of the outlet of the expansion section (7) and the screw shaft (5) is 70-100 degrees.