CN113910460B - Pneumatic stirring tank of secondary grouting machine of shield trolley - Google Patents
Pneumatic stirring tank of secondary grouting machine of shield trolley Download PDFInfo
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- CN113910460B CN113910460B CN202111150996.0A CN202111150996A CN113910460B CN 113910460 B CN113910460 B CN 113910460B CN 202111150996 A CN202111150996 A CN 202111150996A CN 113910460 B CN113910460 B CN 113910460B
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- stirring
- rotating shaft
- vertical rotating
- bearing
- stirring tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
Abstract
The invention discloses a pneumatic stirring tank of a secondary grouting machine of a shield trolley, which comprises a hollow cylindrical stirring tank body and a stirring module arranged in the stirring tank body, wherein the stirring module comprises a vertical rotating shaft arranged at the center of the bottom surface of the stirring tank body, and the vertical rotating shaft is of a hollow structure; the stirring motor is vertically downwards fixed above the stirring tank body, and an output shaft of the stirring motor penetrates through the layered stirring bearing and is connected with the vertical rotating shaft through the connecting support rod; the two ends of the connecting support rod are fixedly connected with the inner side wall of the vertical rotating shaft and the outer side wall of the output shaft of the stirring motor respectively; the device has low manufacturing cost, the stirring tank body can be refitted even by utilizing a common grease tank on a construction site, the structure is simple and convenient to overhaul, the self weight is light, the size is small, the movement is convenient, and the device can be popularized and applied to secondary slurry filling of formed tunnel leakage in the later period.
Description
Technical Field
The invention relates to the field of secondary grouting matching devices of shield trolleys, in particular to a pneumatic stirring tank of a secondary grouting machine of a shield trolley.
Background
The synchronous grouting process is to mix slurry according to a designed mixing ratio through a stirring station on the ground, transport the slurry to a slurry vehicle at a tunnel portal through a pipeline, transport the slurry vehicle to a slurry storage tank matched with the shield tunneling machine through an electric vehicle, stir the slurry at any time by arranging stirring blades in the slurry storage tank and a slurry transporting tank, prevent the slurry from condensing or segregating, then respectively transport the slurry in the slurry storage tank to four grouting pipelines arranged at the tail of the shield through two grouting pumps, and finally directly transport the slurry to a gap behind the wall through grouting pipes to play a role in filling, wherein the whole grouting process is synchronous with the propulsion of the shield tunneling machine.
The secondary grouting is used as an auxiliary construction method for shield construction, and mainly plays a supplementary role. Because the synchronous grouting liquid is contracted after solidification, the annular gap is not filled compactly, or the ground surface subsidence is not controlled effectively, the secondary grouting is needed after the synchronous grouting is finished. According to feedback information of ground surface subsidence monitoring, the annular gap of the backing is filled by double slurry in combination with the back cavity condition obtained by ultrasonic detection in the hole, so that the groundwater system is prevented from rushing into the tunnel face. But the grouting pressure must not exceed 0.4Mpa, preventing the segment from being damaged.
In the existing secondary grouting process, slurry mixed according to a designed mixing ratio is usually transported to a secondary grouting hole through a stirring station on the ground through a slurry vehicle, grouting equipment is directly arranged near the secondary grouting hole, grouting materials are placed, the grouting materials are stirred in real time by using a special stirrer, and then grouting holes are injected by using a grouting pump.
The current thick liquid mixer or thick liquid agitator, like the electronic thick liquid mixer of model JDW500, the structure is comparatively simple, its major structure is the barrel, drive the stirring vane at the barrel head through the motor that sets up in the top and stir thick liquid, because this mixer is equipped with stirring vane only in inside bottom surface, stirring effect to the grouting liquid that needs constantly to stir to prevent solidifying is unobvious, cause the local solidification of grouting liquid easily, and current special thick liquid mixer is expensive, diameter 90cm, high 60cm, the single selling price of thick liquid mixer of capacity about 0.24 side is about 10000 yuan, construction cost has been greatly improved.
As another example, patent number CN202110373293.8 discloses a grouting device for a shield machine, which comprises a frame and a grouting barrel, the grouting barrel top is provided with grouting port, slurry inlet and grouting pump, grouting barrel one end side center runs through and is provided with the (mixing) shaft, the (mixing) shaft is located the inside one end of grouting barrel and is provided with rabbling mechanism, rabbling mechanism includes connecting rod and stirring leaf, the (mixing) shaft is kept away from (mixing) mechanism one end and is provided with agitator motor, agitator motor base sliding connection has the slide rail, the agitator motor base is connected with slide connection board, slide connection board still includes the slip spacing hole, the slide connection board lower part is provided with mobile device, mobile device includes backup pad, mobile motor, eccentric wheel and eccentric shaft, eccentric shaft embedding slip spacing hole sliding connection. The grouting device for the shield tunneling machine is difficult to solidify slurry to cause blockage, fully agitates, and is convenient to clean. However, the grouting device disclosed in the patent application is complex in structure on one hand, and meanwhile, the related components are required to be customized by an additional manufacturer, so that the construction cost is increased in an intangible way.
Therefore, a pneumatic stirring tank of a secondary grouting machine of a shield trolley, which has the advantages of simple structure, good stirring effect, convenient operation and low cost, is needed.
Disclosure of Invention
The invention solves the technical problems that the pneumatic stirring tank of the secondary grouting machine of the shield trolley is high in manufacturing cost and low in stirring effect on grouting liquid, and the problem that the grouting liquid is partially solidified to cause waste of raw materials and unqualified grouting quality is easily caused.
In order to solve the technical problems, the invention adopts the following technical scheme: the pneumatic stirring tank of the secondary grouting machine of the shield trolley comprises a hollow cylindrical stirring tank body and a stirring module arranged in the stirring tank body, wherein the stirring module comprises a vertical rotating shaft arranged at the center of the bottom surface of the stirring tank body, and the vertical rotating shaft is of a hollow structure; the stirring motor is vertically downwards fixed above the stirring tank body, and an output shaft of the stirring motor penetrates through the layered stirring bearing and is connected with the vertical rotating shaft through the connecting support rod; the two ends of the connecting support rod are fixedly connected with the inner side wall of the vertical rotating shaft and the outer side wall of the output shaft of the stirring motor respectively;
a plurality of layers of hollow stirring blades are arranged on the vertical rotating shaft at equal intervals, the cavities of the stirring blades are communicated with the cavities of the vertical rotating shaft, and a plurality of air holes are further formed in the stirring blades; the layered stirring bearing is arranged at the top of the vertical rotating shaft and comprises an upper bearing and a lower bearing, and the inner ring of the upper bearing is fixedly connected with the inner ring of the lower bearing; the top surface of the vertical rotating shaft is fixedly connected with the lower surface of the outer ring of the lower bearing, and an output shaft of the stirring motor penetrates through the layered stirring bearing and is fixedly connected with the inner rings of the upper bearing and the lower bearing; an air charging hole is formed in the side wall of the outer ring of the upper bearing, the air pump charges air into the vertical rotating shaft through the air charging hole, and a baffle plate for sealing the layered stirring bearing is further arranged between the outer ring and the inner ring of the upper surface of the upper bearing.
In particular, the stirring blades on the upper layer are staggered with the stirring blades on the lower layer.
Further, an inclined included angle exists between the stirring blade and the horizontal plane.
Further, the upper layer stirring blade and the lower layer stirring blade are inclined in opposite directions.
In particular, the air hole is also formed in the air rod, the air hole is formed in the air rod, and the cavity of the air rod is communicated with the cavity of the vertical rotating shaft.
Particularly, an air storage tank is further arranged between the air pump and the stirring tank body, and the air storage tank is connected with the stirring tank body through a ball valve.
Compared with the prior art, the invention has the following advantages and beneficial effects: the invention has low cost, the stirring tank body can be refitted even by utilizing a common grease tank on a construction site, the structure is simple, the overhaul is convenient, the self weight is light, the size is small, the movement is convenient, and the invention can be popularized and applied to secondary slurry filling of the leakage of a formed tunnel in the later period; simultaneously optimizing the existing single mechanical stirring into a mode of mechanical stirring and pneumatic stirring mixing, stirring is more uniform, and air holes are formed in the stirring blades, so that stirring dead angles do not exist in the stirring process of the inner part of the whole stirring tank body, the phenomenon that slurry is locally solidified is avoided, the management and control of construction quality are facilitated, the follow-up construction loss caused by the fact that the quality of secondary grouting does not reach the standard is avoided, and the construction cost is effectively saved.
Drawings
Fig. 1 is a schematic cross-sectional structure of a pneumatic stirring tank of a secondary grouting machine of a shield trolley.
Fig. 2 is an enlarged sectional view of fig. 1 at a.
The definitions of the various numbers in the figures are: a stirring tank body-1; a gas storage tank-2; ball valve-21; a vertical rotating shaft-3; a middle air rod-31; stirring blade-4; air holes-41; stirring motor-5; a connecting strut-51; an output shaft-52 of the stirring motor; a layered stirring bearing-6; an upper bearing-61; a lower bearing-62; a baffle-63; inflation hole-64; and an air pump 7.
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, so as to further understand the concept of the present invention, the technical problems to be solved, the technical features constituting the technical solutions, and the technical effects brought thereby.
Referring to fig. 1-2, the pneumatic stirring tank of the secondary grouting machine of the shield-driven trolley comprises a hollow cylindrical stirring tank body 1 and a stirring module arranged in the stirring tank body 1, wherein the stirring module comprises a vertical rotating shaft 3 arranged at the center of the bottom surface of the stirring tank body 1, and the vertical rotating shaft 3 is of a hollow structure; the stirring motor 5 is vertically downwards fixed above the stirring tank body 1, and an output shaft 52 of the stirring motor penetrates through the layered stirring bearing 6 and is connected with the vertical rotating shaft 3 through a connecting support rod 51; the two ends of the connecting strut 51 are fixedly connected with the inner side wall of the vertical rotating shaft 3 and the outer side wall of the stirring motor output shaft 52 respectively;
a plurality of layers of hollow stirring blades 4 are arranged on the vertical rotating shaft 3 at equal intervals, the cavities of the stirring blades 4 are communicated with the cavities of the vertical rotating shaft 3, and a plurality of air holes 41 are further formed in the stirring blades 4; the layered stirring bearing 6 is arranged at the top of the vertical rotating shaft 3 and comprises an upper bearing 61 and a lower bearing 62, wherein the inner ring of the upper bearing 61 is fixedly connected with the inner ring of the lower bearing 62; the top surface of the vertical rotating shaft 3 is fixedly connected with the lower surface of the outer ring of the lower bearing 62, and the stirring motor output shaft 52 penetrates through the layered stirring bearing 6 and is fixedly connected with the inner rings of the upper bearing 61 and the lower bearing 62; an air charging hole 64 is formed in the outer ring side wall of the upper bearing 61, the air pump 7 charges air into the vertical rotating shaft 3 through the air charging hole 64, and a baffle 63 for sealing the layered stirring bearing 6 is further arranged between the outer ring and the inner ring of the upper surface of the upper bearing 61.
As a preferred embodiment, the stirring blades 4 of the upper layer are staggered with the stirring blades 4 of the lower layer; the grouting liquid forms annular fluid under the mechanical stirring action of the stirring blades 4, and the relative positions of the upper layer of stirring blades 4 and the lower layer of stirring blades are staggered, so that the upper layer of grouting liquid and the lower layer of grouting liquid form unsynchronized annular fluid, the relative movement between the upper layer of grouting liquid and the lower layer of grouting liquid is enhanced, and a better stirring effect is obtained.
As a further embodiment, the stirring vane 4 is inclined with respect to the horizontal.
As a further embodiment, the upper layer of stirring blades 4 is inclined in the opposite direction to the lower layer of stirring blades 4. After the stirring process is carried out to a certain extent, the overall stirring state of the upper-layer grouting liquid driven by the upper-layer stirring blade 4 and the lower-layer stirring blade 4 tends to be dynamic balance, the fluid states of the upper-layer grouting liquid and the lower-layer grouting liquid tend to be different under the dynamic balance state through the reverse stirring blade 4, and the upper-layer grouting liquid and the lower-layer grouting liquid are fully mixed and stirred together with the gas which continuously turns upwards.
As a preferred embodiment, the air conditioner further comprises an air rod 31 obliquely arranged on the vertical rotating shaft 3, the air rod 31 is also provided with an air hole 41, and the cavity of the air rod 31 is communicated with the cavity of the vertical rotating shaft 3; the relatively balanced and stable grouting liquid is subjected to additional disturbance through the middle air rod 31, and additional air injection is performed through the air hole 41 on the middle air rod 31, so that the effect of turbulent flow is achieved, meanwhile, the fluid states of the upper grouting liquid and the lower grouting liquid tend to be different under the dynamic balance state due to the reverse stirring blades 4, the upper grouting liquid and the lower grouting liquid can be mutually communicated at the junction through the existence of the middle air rod 31, the upper grouting liquid and the lower grouting liquid are mutually fused, and stirring dead angles are avoided while stirring is accelerated.
As a preferred embodiment, a gas storage tank 2 is further arranged between the gas pump 7 and the stirring tank 1, and the gas storage tank 2 is connected with the stirring tank 1 through a ball valve 21.
In the working process of the device, the stirring tank body 1 is used as a container for containing slurry and stirring, and the stirring motor 5, the hollow vertical rotating shaft 3 and the stirring blade 4 arranged on the vertical rotating shaft 3 are used for stirring the grouting liquid in the stirring tank body 1. Because the grouting liquid has certain viscosity, in order to avoid stirring dead angles, a plurality of groups of stirring blades 4 are uniformly arranged on the hollow vertical rotating shaft 3 along the vertical direction so as to strengthen the stirring effect, the grouting liquid in the stirring tank body 1 is divided into a plurality of layers, and the grouting liquid with different layers is stirred through the stirring blades 4. However, in this state, since the grouting liquid between different layers is independent of each other, in order to increase the fluidity of the grouting liquid, the flow of the grouting liquid is maintained as much as possible, the output shaft 52 of the stirring motor is inserted into the hollow vertical rotary shaft 3 after passing through the layered stirring bearing 6, and the output shaft 52 of the stirring motor is fixed to the inner ring of the layered stirring bearing 6. Wherein, the layered stirring bearing 6 is formed by overlapping two bearings, the inner rings of the upper bearing 61 and the lower bearing 62 are connected together as a whole, and the lower surface of the outer ring of the lower bearing 62 of the layered stirring bearing 6 is fixedly connected with the upper surface of the vertical rotating shaft 3. The output shaft 52 of the stirring motor passes through the layered stirring bearing 6 and is connected with the lower bearing 62 of the layered bearing 6 and the vertical rotating shaft 3 into a whole through the connecting support rod 51. When the stirring motor 5 is started, the output shaft 52 of the stirring motor drives the vertical rotating shaft 3 and the lower bearing 62 to rotate through the connecting support rod 51, so as to drive the stirring blades 4 below to rotate together to stir the grouting liquid. At this time, the upper bearing 61 does not rotate, the air pump 7 is connected with the inner space of the upper bearing 61 through the air charging hole 64 of the outer ring of the upper bearing 61, the baffle 63 between the outer ring and the inner ring of the upper surface of the upper bearing 61 is a sealing plate, air is pumped into the upper bearing 61 by the air pump 7 and enters into the cavity of the vertical rotating shaft 3, is pumped to each layer of stirring blades 4 below by the cavity and is permeated out by the air holes 41 on the stirring blades 4, and enters into grouting liquid, so that grouting liquid is stirred, the lower layer grouting liquid rises upwards under the action of pumped air, and is further matched with mechanical stirring of the stirring blades 4, so that the purpose of fully stirring and mixing to prevent solidification is achieved.
In order to prevent the gap between the outer rings of the upper bearing 61 and the lower bearing 62 from leaking gas, the contact surface of the upper bearing 61 and the lower bearing 62 is also provided with an annular groove, and the annular groove is sealed by high-pressure sealing grease; the outer part of the layered stirring bearing 6 can also be sleeved with a sealing box, a hose connected with the air pump 7 penetrates through the side wall of the sealing box to be connected with an upper bearing 61 of the layered stirring bearing 6, and the output shaft 52 of the stirring motor and the vertical rotating shaft 3 respectively penetrate through the upper surface and the lower surface of the sealing box.
Compared with the existing slurry stirrer, the device provided by the invention performs compound stirring by using the gas which continuously rises from bottom to top through mechanical stirring and gas mixing, and the stirring is more uniform, and meanwhile, the phenomenon that the existing slurry stirrer is easy to occur because of dead angle of stirring caused by simple mechanical stirring is avoided, so that the phenomenon of local concreting of grouting liquid is avoided. Meanwhile, the raw materials of the device are common materials in a construction site, the manufacturing cost is low, compared with the selling price of a single unit of the existing slurry stirrer, the single unit of the device is about six thousand yuan, the cost is saved by nearly half, and particularly, the device can be used for secondary slurry supplementing of leakage of a formed tunnel, has wide popularization prospect and practical use value, and can generate larger economic benefit.
The device has low manufacturing cost, the stirring tank body can be refitted even by utilizing a common grease tank on a construction site, the structure is simple and convenient to overhaul, the self weight is light, the size is small, the movement is convenient, and the device can be popularized and applied to secondary slurry filling of formed tunnel leakage; simultaneously optimizing the existing single mechanical stirring into a mode of mechanical stirring and pneumatic stirring mixing, stirring is more uniform, and air holes are formed in the stirring blades, so that stirring dead angles do not exist in the stirring process of the inner part of the whole stirring tank body, the phenomenon that slurry is locally solidified is avoided, the management and control of construction quality are facilitated, the follow-up construction loss caused by the fact that the quality of secondary grouting does not reach the standard is avoided, and the construction cost is effectively saved.
The terms "connected" and "fixed" used in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the terms in the present invention is understood in specific cases.
In the description of the present invention, the terms "center," "upper," "lower," "horizontal," "inner," "outer," and the like are used merely for convenience in describing the present invention and to simplify the description, and do not denote or imply a particular orientation that the device or element in question must have, and thus should not be construed as limiting the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. The pneumatic stirring tank of the shield trolley secondary grouting machine comprises a hollow cylindrical stirring tank body (1) and a stirring module arranged in the stirring tank body (1), and is characterized in that the stirring module comprises a vertical rotating shaft (3) arranged at the center of the bottom surface of the stirring tank body (1), and the vertical rotating shaft (3) is of a hollow structure; the stirring tank is characterized by further comprising a stirring motor (5), wherein the stirring motor (5) is vertically downwards fixed above the stirring tank body (1), and an output shaft (52) of the stirring motor passes through the layered stirring bearing (6) and is connected with the vertical rotating shaft (3) through a connecting support rod (51); two ends of the connecting strut (51) are fixedly connected with the inner side wall of the vertical rotating shaft (3) and the outer side wall of the stirring motor output shaft (52) respectively;
a plurality of layers of hollow stirring blades (4) are arranged on the vertical rotating shaft (3) at equal intervals, the cavities of the stirring blades (4) are communicated with the cavities of the vertical rotating shaft (3), and a plurality of air holes (41) are further formed in the stirring blades (4); the air hole type vertical rotating shaft is characterized by further comprising an air hole rod (31) obliquely arranged on the vertical rotating shaft (3), wherein an air hole (41) is also formed in the air hole rod (31), and a cavity of the air hole rod (31) is communicated with a cavity of the vertical rotating shaft (3); the layered stirring bearing (6) is arranged at the top of the vertical rotating shaft (3) and comprises an upper bearing (61) and a lower bearing (62), and the inner ring of the upper bearing (61) is fixedly connected with the inner ring of the lower bearing (62); the top surface of the vertical rotating shaft (3) is fixedly connected with the lower surface of the outer ring of the lower bearing (62), and the output shaft (52) of the stirring motor penetrates through the layered stirring bearing (6) and is fixedly connected with the upper bearing (61) and the inner ring of the lower bearing (62); an air charging hole (64) is formed in the outer ring side wall of the upper bearing (61), the air pump (7) charges air into the vertical rotating shaft (3) through the air charging hole (64), and a baffle (63) for sealing the layered stirring bearing (6) is further arranged between the outer ring and the inner ring of the upper surface of the upper bearing (61).
2. A pneumatic stirring tank of a secondary grouting machine for a shield-driven trolley according to claim 1, wherein the stirring blades (4) of the upper layer are staggered with the stirring blades (4) of the lower layer.
3. A pneumatic stirring tank for a secondary grouting machine of a shield tunneling trolley according to claim 2, wherein an inclined included angle exists between the stirring blade (4) and the horizontal plane.
4. A pneumatic stirring tank for a secondary grouting machine of a shield tunneling machine according to claim 3, wherein the upper layer stirring vane (4) is inclined in the opposite direction to the lower layer stirring vane (4).
5. The pneumatic stirring tank of the shield-driven trolley secondary grouting machine according to claim 1, wherein an air storage tank (2) is further arranged between the air pump (7) and the stirring tank body (1), and the air storage tank (2) is connected with the stirring tank body (1) through a ball valve (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111150996.0A CN113910460B (en) | 2021-09-29 | 2021-09-29 | Pneumatic stirring tank of secondary grouting machine of shield trolley |
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| CN202111150996.0A CN113910460B (en) | 2021-09-29 | 2021-09-29 | Pneumatic stirring tank of secondary grouting machine of shield trolley |
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| CN113910460B true CN113910460B (en) | 2023-05-30 |
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| CN104446734B (en) * | 2014-12-22 | 2016-09-21 | 遵义联谷农业科技有限公司 | Sealed fermenting fertilizer QI invigorating transfusion agitating device |
| CN206535501U (en) * | 2017-02-07 | 2017-10-03 | 山西嘉生医药化工有限公司 | A kind of mixing arrangement with pneumatic stirring function |
| CN207088234U (en) * | 2017-07-23 | 2018-03-13 | 山东盛宝玻璃钢有限公司 | Pneumatic mixing device |
| CN207913584U (en) * | 2018-01-24 | 2018-09-28 | 长沙固莱建材有限公司 | A kind of hand-rail type agitating device |
| CN108159952A (en) * | 2018-02-28 | 2018-06-15 | 苏州市吴中区双龙油漆涂料有限公司 | A kind of coating material agitator with multiple agitating function |
| CN109289599A (en) * | 2018-09-12 | 2019-02-01 | 安徽康瑞高科新材料技术工程有限公司 | A kind of high speed paint mixing tank |
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