CN113910460A - Shield constructs pneumatic agitator tank of platform truck secondary slip casting machine - Google Patents
Shield constructs pneumatic agitator tank of platform truck secondary slip casting machine Download PDFInfo
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- CN113910460A CN113910460A CN202111150996.0A CN202111150996A CN113910460A CN 113910460 A CN113910460 A CN 113910460A CN 202111150996 A CN202111150996 A CN 202111150996A CN 113910460 A CN113910460 A CN 113910460A
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- stirring
- rotating shaft
- vertical rotating
- bearing
- tank body
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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 a circle of the bottom surface of the stirring tank body, and the vertical rotating shaft is of a hollow structure; the stirring device also comprises a stirring motor, wherein the stirring motor is vertically fixed above the stirring tank body downwards, and an output shaft of the stirring motor penetrates through the layered stirring bearing and is connected with the vertical rotating shaft through a connecting support rod; 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 even refitted by using a common grease tank on a construction site, the structure is simple, the maintenance is convenient, the dead weight is light, the size is small, the movement is convenient, and the device can be popularized and applied to secondary slurry supplement of leakage of a formed tunnel in 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
Synchronous slip casting process is the thick liquid of mixing according to the design mix proportion through subaerial stirring station, through pipeline transportation to the thick liquid car of tunnel portal, the thick liquid car transports the supporting slurry storage tank behind the shield structure machine through the storage battery car, all be equipped with stirring vane in slurry storage tank and fortune thick liquid jar simultaneously and stir the thick liquid at any time, can prevent that the thick liquid from condensing or educing, then the thick liquid in the slurry storage tank is carried respectively to four slip casting pipelines of installing at the shield tail through two grouting pumps, at last the direct clearance plays the filling effect behind the wall of carrying to by the slip casting pipe, and whole slip casting process is gone on in step with the propulsion of shield structure machine.
The secondary grouting is used as an auxiliary construction method for shield construction and mainly plays a role in supplementing. Because the synchronous grouting liquid shrinks after being solidified, the annular gap is not filled compactly, or under the condition that the ground surface settlement cannot be effectively controlled, secondary grouting needs to be performed after the synchronous grouting is finished. According to the feedback information of surface settlement monitoring, the cavity condition behind the back lining obtained by ultrasonic detection in the cavity is combined, and the annular gap of the back lining is filled with two-fluid slurry to prevent an underground water system from rushing into the tunnel face. But the grouting pressure must not exceed 0.4Mpa, so that the damage to the duct piece is prevented.
In the existing secondary grouting process, the slurry mixed according to the design mixing proportion is usually transported to a secondary grouting hole through a slurry truck by an above-ground mixing station, or grouting equipment is directly arranged near the secondary grouting hole, grouting materials are placed, the grouting slurry is stirred in real time by a special stirrer, and then a grouting pump is used for injecting the grouting slurry into the grouting hole.
The existing slurry mixer or slurry mixing barrel, such as the JDW500 model electric slurry mixer, has a simple structure, the main structure is a barrel, the slurry is mixed by the mixing blade at the bottom of the barrel driven by the motor at the top, because the mixer is only provided with the mixing blade at the inner bottom, the mixing action to the slurry needing to be continuously mixed to prevent solidification is not obvious, the partial solidification of the slurry is easily caused, the price of the existing special slurry mixer is expensive, the diameter is 90cm, the height is 60cm, the single sale price of the slurry mixer with the capacity of about 0.24 is about 10000 yuan, and the construction cost is greatly improved.
As patent No. CN202110373293.8 discloses a slip casting device for shield constructs machine again, including frame and slip casting bucket, slip casting bucket top is provided with slip casting mouth, thick liquids import and grouting pump, slip casting bucket one end side center runs through and is provided with the (mixing) shaft, the (mixing) shaft is located the inside one end of slip casting bucket and is provided with rabbling mechanism, rabbling mechanism includes connecting rod and stirring leaf, the (mixing) shaft is kept away from rabbling 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 sliding connection board, sliding connection board still includes the spacing hole of slip, the sliding connection board lower part is provided with the mobile device, the mobile device includes backup pad, moving motor, eccentric wheel and eccentric shaft, the eccentric shaft embedding slip spacing hole sliding connection. This a slip casting device for shield constructs machine, the difficult solidification of thick liquids causes the jam to obtain abundant stirring, be convenient for wash simultaneously. However, the grouting device related in the patent application is relatively complex in structure, and the related components need to be additionally customized by manufacturers, so that the construction cost is increased virtually.
Therefore, the pneumatic stirring tank of the secondary grouting machine of the shield trolley, which has the advantages of simple structure, good stirring effect, convenience in operation and low cost, is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pneumatic stirring tank of a secondary grouting machine of a shield trolley, the existing special slurry stirring machine is high in manufacturing cost, the stirring effect on grouting liquid is not obvious, and the problems of raw material waste and unqualified grouting quality caused by local solidification of the grouting liquid are easily caused.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a pneumatic stirring tank of a secondary grouting machine of a 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 of the stirring tank body, and the vertical rotating shaft is of a hollow structure; the stirring device also comprises a stirring motor, wherein the stirring motor is vertically fixed above the stirring tank body downwards, and an output shaft of the stirring motor penetrates through the layered stirring bearing and is connected with the vertical rotating shaft through a connecting support rod; 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 cavity of the vertical rotating shaft, and a plurality of air holes are also 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 an inner ring of the upper bearing is fixedly connected with an 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 upper bearing and the inner ring of the lower bearing; an inflation hole is formed in the side wall of the outer ring of the upper bearing, an air pump inflates the vertical rotating shaft through the inflation hole, and a baffle plate used 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.
Particularly, the stirring blades of the upper layer and the stirring blades of the lower layer are arranged in a staggered mode.
Furthermore, an inclined included angle is formed between the stirring blade and the horizontal plane.
Furthermore, the inclination directions of the stirring blades of the upper layer and the stirring blades of the lower layer are opposite.
Particularly, the air-assisted rotary shaft device further comprises a hollow air rod obliquely arranged on the vertical rotary shaft, wherein the hollow air rod is also provided with an air hole, and the cavity of the hollow air rod is communicated with the cavity of the vertical rotary shaft.
Particularly, a gas storage tank is further arranged between the gas pump and the stirring tank body, and the gas 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 stirring tank body is low in manufacturing cost, even can be modified by using a common grease tank on a construction site, is simple in structure, convenient to maintain, light in dead weight, small in size and convenient to move, and can be popularized and applied to secondary slurry supplement of leakage of a formed tunnel in the later stage; simultaneously with the optimization of current single mechanical stirring for mechanical stirring and the form that pneumatic stirring mixes, the stirring is more even, through setting up the gas pocket on stirring vane for there is not the stirring dead angle in the inside stirring of whole agitator tank, has avoided appearing the phenomenon that thick liquids local solidification, is favorable to construction quality's management and control, avoids the follow-up construction loss that secondary slip casting quality is not up to standard to cause, has effectively practiced thrift construction cost.
Drawings
Fig. 1 is a schematic sectional structure view of a secondary grouting machine pneumatic stirring tank of a shield trolley.
Fig. 2 is an enlarged sectional view of a portion a in fig. 1.
The explanation of each reference number in the figure is: a stirring tank body-1; a gas storage tank-2; a ball valve-21; a vertical rotating shaft-3; a hollow air rod-31; stirring blades-4; air vent-41; a stirring motor-5; a connecting strut-51; an output shaft-52 of the stirring motor; a layered mixing bearing-6; an upper bearing-61; a lower bearing-62; a baffle-63; an inflation hole-64; 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, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions.
Referring to fig. 1-2, the pneumatic stirring tank of the secondary grouting machine of the shield 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 device further comprises a stirring motor 5, wherein the stirring motor 5 is vertically and 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 then is connected with the vertical rotating shaft 3 through a connecting support rod 51; two ends of the connecting support rod 51 are respectively fixedly connected with the inner side wall of the vertical rotating shaft 3 and the outer side wall of the output shaft 52 of the stirring motor;
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 cavity of the vertical rotating shaft 3, and a plurality of air holes 41 are also arranged on 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, 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 inner rings of the upper bearing 61 and the lower bearing 62; an inflation hole 64 is formed in the side wall of the outer ring of the upper bearing 61, the air pump 7 inflates air into the vertical rotating shaft 3 through the inflation hole 64, and a baffle 63 for sealing the layered mixing 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 slip casting liquid forms annular fluid under stirring vane 4's mechanical stirring effect, through the relative position of staggering upper and lower layer stirring vane 4 to make upper slip casting liquid and lower floor's slip casting liquid form asynchronous annular fluid, strengthen the relative motion between upper slip casting liquid and the lower floor's slip casting liquid, thereby obtain better stirring effect.
As a further example, the stirring blade 4 is inclined at an angle to the horizontal.
As a further embodiment, the upper layer stirring blade 4 and the lower layer stirring blade 4 are inclined in opposite directions. Because after the stirring process goes on to a certain degree, the whole state of stirring of this layer slip casting liquid that upper stirring vane 4 and lower floor's stirring vane 4 drove tends to dynamic balance, makes upper slip casting liquid and lower floor's slip casting liquid difference in the fluid state that tends to dynamic balance state through reverse stirring vane 4, and the gas that constantly overturns upwards of cooperation carries out the intensive mixing stirring.
As a preferred embodiment, the device further comprises a hollow air rod 31 obliquely arranged on the vertical rotating shaft 3, the hollow air rod 31 is also provided with an air hole 41, and the cavity of the hollow air rod 31 is communicated with the cavity of the vertical rotating shaft 3; carry out extra disturbance to relative balance and stable slip casting liquid through well air pole 31, carry out extra gas injection through gas pocket 41 on the well air pole 31 simultaneously, play the effect of vortex, simultaneously because reverse stirring vane 4 makes upper strata slip casting liquid and lower floor's slip casting liquid difference appears in the fluid state that tends to under the dynamic balance state, the mutual exchange of upper strata slip casting liquid and lower floor's slip casting liquid in the junction also can accelerate to the existence of well air pole 31, upper strata slip casting liquid fuses with lower floor's slip casting liquid each other, avoid appearing the stirring dead angle when accelerating the stirring.
As a preferred embodiment, 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.
In the working process of the device, the stirring tank body 1 is used as a container for containing and stirring the slurry, and the slurry injection is stirred in the stirring tank body 1 through a stirring motor 5, a hollow vertical rotating shaft 3 and a stirring blade 4 arranged on the vertical rotating shaft 3. Because the slip casting liquid itself has certain viscosity, in order to avoid appearing the stirring dead angle, simultaneously in order to strengthen the stirring effect, be equipped with a plurality of stirring vane 4 of group along vertical direction uniformly on hollow vertical rotating shaft 3, divide into a plurality of layers with the slip casting liquid in the agitator tank body 1, stir the slip casting liquid of different levels through stirring vane 4. However, in this state, since the grouting liquids at different levels are independent from each other, in order to increase the fluidity of the grouting liquid and maintain the flow state of the grouting liquid to the maximum extent possible, the stirring motor output shaft 52 is inserted through the layered stirring bearing 6 and then extended into the hollow vertical rotating shaft 3, and the stirring motor output shaft 52 is fixed to the inner ring of the layered stirring bearing 6. The layered mixing bearing 6 is formed by overlapping two bearings, the inner rings of the upper bearing 61 and the lower bearing 62 are connected together to form a whole, and the lower surface of the outer ring of the lower bearing 62 of the layered mixing bearing 6 is fixedly connected with the upper surface of the vertical rotating shaft 3. The output shaft 52 of the stirring motor penetrates 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 stirring motor output shaft 52 drives the vertical rotating shaft 3 and the lower bearing 62 to rotate through the connecting support rod 51, and further drives the stirring blades 4 below to rotate together to stir the grouting liquid. At this moment, 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 inflation hole 64 in the outer ring of the upper bearing 61, the baffle 63 between the outer ring of the upper surface of the upper bearing 61 and the inner ring is a closed plate, air is pumped into the upper bearing 61 through the air pump 7 and enters the cavity of the vertical rotating shaft 3, the air is pumped to the stirring blades 4 on each layer below through the cavity and is penetrated out through the air holes 41 in the stirring blades 4 to enter grouting liquid, and therefore the grouting liquid is stirred, the grouting liquid on the lower layer rises upwards under the action of the pumped air, and further the mechanical stirring of the stirring blades 4 is matched, so that the purposes of fully stirring, mixing and preventing solidification are achieved.
In order to prevent air leakage of a gap between the outer rings of the upper bearing 61 and the lower bearing 62, an annular groove is further formed in the contact surface of the upper bearing 61 and the lower bearing 62, and the annular groove is sealed through high-pressure sealing grease; a sealed box may be sleeved outside the layered mixing bearing 6, a hose connected to the air pump 7 passes through the sidewall of the sealed box to be connected to the upper bearing 61 of the layered mixing bearing 6, and the mixing motor output shaft 52 and the vertical rotating shaft 3 pass through the upper surface and the lower surface of the sealed box, respectively.
Compared with the existing slurry mixer, the device provided by the invention is matched with gas mixing through mechanical stirring, and the gas rising continuously from bottom to top is utilized for carrying out combined stirring, so that the stirring is more uniform, and the phenomenon that the slurry is locally solidified due to the existence of a stirring dead angle caused by pure mechanical stirring in the existing slurry mixer is avoided. Meanwhile, the raw materials of the device are common materials in construction sites, the manufacturing cost is low, compared with the selling price of a single slurry mixer which is nearly ten thousand yuan, the manufacturing cost of the device is about six thousand yuan, nearly half of the cost is saved, especially, the device can be used for secondary slurry supplement of leakage of a formed tunnel, the popularization prospect and the practical use value are wide, and the economic benefit can be generated.
The device has low manufacturing cost, the stirring tank body can be even refitted by using a common grease tank on a construction site, the structure is simple, the maintenance is convenient, the dead weight is light, the size is small, the movement is convenient, and the device can also be popularized and applied to secondary slurry supplement of leakage of a formed tunnel; simultaneously with the optimization of current single mechanical stirring for mechanical stirring and the form that pneumatic stirring mixes, the stirring is more even, through setting up the gas pocket on stirring vane for there is not the stirring dead angle in the inside stirring of whole agitator tank, has avoided appearing the phenomenon that thick liquids local solidification, is favorable to construction quality's management and control, avoids the follow-up construction loss that secondary slip casting quality is not up to standard to cause, has effectively practiced thrift construction cost.
The terms "connected" and "fixed" in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the above terms in the present invention is understood.
In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. are used in the orientation or positional relationship indicated only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element referred to must have a particular orientation and therefore should not be construed as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A pneumatic stirring tank of a secondary grouting machine of a shield trolley 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 a circle of the bottom surface of the stirring tank body (1), and the vertical rotating shaft (3) is of a hollow structure; the stirring device is characterized by further comprising a stirring motor (5), wherein the stirring motor (5) is vertically fixed above the stirring tank body (1) downwards, 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); two ends of the connecting support rod (51) are respectively and fixedly connected with the inner side wall of the vertical rotating shaft (3) and the outer side wall of the output shaft (52) of the stirring motor;
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 cavity of the vertical rotating shaft (3), and a plurality of air holes (41) are also arranged on 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), 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 inflation hole (64) is formed in the side wall of the outer ring of the upper bearing (61), the air pump (7) inflates air into the vertical rotating shaft (3) through the inflation hole (64), and a baffle (63) used 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. The shield trolley secondary grouting machine pneumatic stirring tank as claimed in claim 1, characterized in that the stirring blades (4) of the upper layer are staggered with the stirring blades (4) of the lower layer.
3. The shield trolley secondary grouting machine pneumatic agitator tank of claim 2, characterized in that an inclined angle exists between the agitating blade (4) and the horizontal plane.
4. The shield trolley secondary grouting machine pneumatic stirring tank as claimed in claim 3, characterized in that the inclination directions of the stirring blades (4) of the upper layer and the stirring blades (4) of the lower layer are opposite.
5. The shield trolley secondary grouting machine pneumatic stirring tank as claimed in claim 1, further comprising a hollow air rod (31) obliquely arranged on the vertical rotating shaft (3), wherein the hollow air rod (31) is also provided with an air hole (41), and the cavity of the hollow air rod (31) is communicated with the cavity of the vertical rotating shaft (3).
6. The pneumatic stirring tank of the secondary grouting machine of the shield trolley as claimed in 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 |
|---|---|---|---|
| CN202111150996.0A CN113910460B (en) | 2021-09-29 | 2021-09-29 | Pneumatic stirring tank of secondary grouting machine of shield trolley |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111150996.0A CN113910460B (en) | 2021-09-29 | 2021-09-29 | Pneumatic stirring tank of secondary grouting machine of shield trolley |
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| CN113910460A true CN113910460A (en) | 2022-01-11 |
| CN113910460B CN113910460B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114800867A (en) * | 2022-05-05 | 2022-07-29 | 西南石油大学 | Well cementation cement slurry mixing device |
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| 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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| CN114800867B (en) * | 2022-05-05 | 2023-05-30 | 西南石油大学 | Well cementation cement paste mixing arrangement |
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| CN113910460B (en) | 2023-05-30 |
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