CN112431204A - Control method for preventing concrete segregation caused by downward conveying of concrete with large height difference - Google Patents
Control method for preventing concrete segregation caused by downward conveying of concrete with large height difference Download PDFInfo
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- CN112431204A CN112431204A CN202011363100.2A CN202011363100A CN112431204A CN 112431204 A CN112431204 A CN 112431204A CN 202011363100 A CN202011363100 A CN 202011363100A CN 112431204 A CN112431204 A CN 112431204A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005204 segregation Methods 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 29
- 239000011083 cement mortar Substances 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention particularly relates to a control method for preventing concrete segregation during downward concrete conveying with large height difference, which solves the problems that the existing operation mode for downward concrete conveying with large height difference is easy to cause pipe blockage and low in conveying efficiency. The control method for preventing concrete segregation caused by downward conveying of concrete with large height difference comprises the following steps of S1: assembling the control device: firstly, a vertical guide pipe is installed, then a left support plate and a right support plate are fixed on a supporting platform, and a horizontal guide pipe is installed between the left support plate and the right support plate; then a motor is installed, and an output shaft of the motor is connected with the rotating shaft; finally, the low-level receiving hopper is placed under the discharging hopper; s2: moistening the tube; s3: discharging concrete; s4: interrupting concrete discharging; s5: and (5) recovering concrete discharging. The invention can always keep the concrete in the vertical guide pipe in a full state, and realizes the controllable concrete discharging speed of the vertical guide pipe, thereby effectively preventing the segregation and pipe blockage which are easy to occur when the concrete is conveyed downwards by large height difference.
Description
Technical Field
The invention relates to a control method for concrete conveying, in particular to a control method for preventing concrete segregation caused by downward conveying of concrete with large height difference.
Background
In large underground engineering such as tunnel shafts, subway stations, deep foundation pits and other underground engineering, concrete is often conveyed to the ground from the ground to tens of meters or even hundreds of meters, a chute is adopted when the height difference is small, and a guide pipe is adopted when the height difference is large.
However, practice shows that the existing operation mode of conveying concrete downwards by large height difference has the following problems in application: firstly, when the pipe is adopted for conveying, the free falling phenomenon of concrete can occur under the action of gravity, so that the concrete is easy to separate, the workability (workability, fluidity, uniformity and the like) of the concrete is damaged, and the pipe is often blocked, so that the construction is stopped; secondly, the original method of hoisting the hopper for feeding in multiple times is adopted, so that the construction efficiency is seriously restricted.
Disclosure of Invention
The invention provides a control method for preventing concrete segregation caused by downward conveying of concrete with large height difference, aiming at solving the problems that pipe blockage is easy to occur and the conveying efficiency is low in the conventional operation mode for downward conveying of concrete with large height difference.
The invention is realized by adopting the following technical scheme:
the control method for preventing concrete segregation caused by downward conveying of concrete with large height difference is realized by adopting the following steps:
s1: assembling the control device: firstly, a vertical guide pipe is installed, an exhaust valve is arranged at the upper part of the side wall of the vertical guide pipe, and a supporting platform is arranged below the vertical guide pipe; then a left support plate and a right support plate which are distributed in parallel left and right are fixed on the upper surface of the supporting platform, a horizontal guide pipe is transversely installed between the left support plate and the right support plate, a discharge hopper which is communicated with the horizontal guide pipe and penetrates through the supporting platform is fixed on the lower left side wall of the horizontal guide pipe, and a feed inlet which is communicated with the vertical guide pipe is formed in the upper right side wall of the horizontal guide pipe; the two ends of the horizontal conduit are both fixed with cover plates, the inner cavity of the horizontal conduit is provided with a rotating shaft which is rotatably arranged on the two cover plates in a penetrating way, and the side wall of the rotating shaft is fixed with a helical blade positioned in the inner cavity of the horizontal conduit; two ends of the rotating shaft respectively penetrate through the two cover plates, and two end parts of the rotating shaft respectively rotatably penetrate through the upper parts of the left support plate and the right support plate; then a motor with an output shaft facing left is arranged on the right side of the right support plate, and the output shaft of the motor is connected with the right end part of the rotating shaft through a coupler; finally, the low-level receiving hopper is placed under the discharging hopper, so that the control device is installed;
s2: tube moistening: firstly, cement mortar is poured into a vertical guide pipe from the upper part, and an exhaust valve is opened for exhausting; when cement mortar is filled in the vertical guide pipe and flows to the feeding port of the horizontal guide pipe, the motor is started, the motor drives the rotating shaft to rotate in the forward direction, the helical blade is driven to rotate in the forward direction, the cement mortar is pushed to move from right to left along the horizontal guide pipe, and then the cement mortar is guided out from the discharging hopper, so that pipe moistening operation is completed;
s3: discharging concrete: keeping the running state of the motor unchanged, putting concrete into the vertical guide pipe from the upper part to ensure that the concrete is fully connected with cement mortar at the inlet of the vertical guide pipe, driving the rotating shaft and the helical blade to rotate positively under the driving of the motor to drive the concrete to flow through the vertical guide pipe, the feeding hole and the horizontal guide pipe in sequence at a uniform speed, and finally leading out the concrete from the discharging hopper, thereby finishing the uniform-speed discharging of the concrete;
s4: and (3) interruption of concrete discharging: when the upper concrete transport vehicle needs to be replaced, the motor is turned off in advance, a large amount of concrete is stored in the high-position storage hopper to seal the inlet of the vertical guide pipe, so that air is prevented from entering the vertical guide pipe, and the concrete in the vertical guide pipe stops moving downwards under the resistance action of the helical blades; when the emptying interruption time is long or the height difference is large, the motor is restarted to drive the output shaft of the motor to rotate reversely, so as to drive the rotating shaft and the helical blade to rotate reversely, push the concrete upwards and keep the concrete in the vertical guide pipe in a full state;
s5: and (3) recovering concrete discharging: and continuously feeding concrete into the vertical guide pipe from the upper part, controlling the output shaft of the motor to rotate in the positive direction, driving the rotating shaft and the helical blade to rotate in the positive direction, and recovering the normal feeding of the concrete.
The feed inlet of horizontal pipe is fixed with the inlet pipe of vertical setting, and the up end of inlet pipe passes through flange and vertical pipe fixed connection.
A vertically arranged corrugated pipe connected with the vertical guide pipe and the feed pipe through flanges is arranged between the vertical guide pipe and the feed pipe.
The structural design of bellows makes things convenient for the butt joint of inlet pipe and vertical pipe, has saved the operation of frequently adjusting supporting platform height, provides the simple operation nature when this controlling means installs.
The horizontal guide pipe comprises an upper pipe body and a lower pipe body which are butted up and down, a sealing gasket is arranged between the upper pipe body and the lower pipe body, and the upper pipe body and the lower pipe body are fixedly connected through a plurality of bolts; and bearings with inner rings fixed with the rotating shaft are arranged on the upper part of the left supporting plate, the upper part of the right supporting plate and the middle parts of the two cover plates.
The structural design of the upper pipe body and the lower pipe body is convenient for cleaning, maintaining and overhauling the horizontal guide pipe of the control device, and operation convenience is provided when the control device is maintained later.
A cushion pad is arranged at the bottom of the motor, and a base of the motor is fixedly connected to the supporting platform through a plurality of bolts I penetrating through the cushion pad; the bottom of supporting platform is provided with a plurality of landing legs, and the bottom of every landing leg is all threaded connection has vertical screw rod, and the bottom of vertical screw rod is fixed with the bottom plate.
The structural design of the buffer cushion can reduce the vibration caused by the rotation of the motor, thereby preventing the concrete in the horizontal conduit from being separated under the vibration action; the structural design of vertical screw rod is convenient to the supporting platform leveling with heighten, has saved the loaded down with trivial details operation of adjustment vertical pipe height, the simple operation nature when further providing this controlling means installation.
The shaft coupling can be replaced by a speed reducer.
Compared with the existing operation mode of conveying concrete downwards with large height difference, the control method for preventing concrete segregation caused by conveying concrete downwards with large height difference has the following advantages by adopting a brand new control device:
(1) utilize the resistance that helical blade formed, hinder the concrete from flowing out fast from the bottom of vertical pipe, keep concrete in the vertical pipe to be full of the state, stop concrete free fall in vertical pipe, reach the purpose of prevention concrete segregation, stifled pipe.
(2) The cement mortar is adopted to lubricate the pipe, so that the cement mortar is adhered to the pipe walls of the vertical guide pipe and the horizontal guide pipe, a certain lubricating effect is achieved, and the purposes of lubricating the pipe walls, exhausting air, checking sealing and the like are achieved; meanwhile, air accumulated in the inner cavity of the vertical guide pipe is discharged through the exhaust valve in the pipe moistening process, and the problem that the concrete is emptied due to residual compressed air in the vertical guide pipe is solved.
(3) In the concrete discharging process, the motor drives the rotating shaft and the helical blade to rotate in the positive direction, so that the discharging hopper discharges materials at a constant speed, and the aim of controlling the discharging speed is fulfilled; meanwhile, the concrete can be stirred by forward rotation of the helical blade, and the mixing uniformity of the discharged concrete is further ensured.
(4) When concrete discharging is interrupted, the motor drives the rotating shaft and the helical blade to rotate reversely, so that on one hand, the concrete can be pushed upwards to play a gate effect, and the concrete in the vertical guide pipe is prevented from being discharged; on the other hand, the concrete at the feed inlet can be forcibly stirred, so that the concrete is prevented from being separated at the feed inlet; when the concrete is restored to be discharged, the concrete can be continuously discharged without moistening the pipe again or filling the vertical guide pipe with the concrete.
The control method for preventing concrete segregation during large-altitude-difference downward conveying of concrete can always keep the concrete in the vertical guide pipe in a full state, and realizes controllable concrete discharging speed of the vertical guide pipe, thereby effectively preventing segregation and pipe blockage which easily occur during large-altitude-difference downward conveying of concrete. The control method has the advantages of clear principle, ingenious design, simple manufacture and convenient operation, and can be popularized and applied in construction occasions of downward conveying concrete with large altitude difference. The invention can also be used at the discharge port of the concrete pump truck to prevent the concrete segregation phenomenon when the concrete is conveyed downwards, thereby expanding the application range of the concrete pump truck.
Drawings
Fig. 1 is a schematic structural diagram of a control device in the present invention.
In the figure, 1-vertical conduit, 2-exhaust valve, 3-supporting platform, 4-left support plate, 5-right support plate, 6-horizontal conduit, 7-discharge hopper, 8-cover plate, 9-rotating shaft, 10-motor, 11-helical blade, 12-low receiving hopper, 13-feed pipe, 14-buffer pad, 15-supporting leg, 16-vertical screw and 17-bottom plate.
Detailed Description
The control method for preventing concrete segregation caused by downward conveying of concrete with large height difference is realized by adopting the following steps:
s1: assembling the control device: firstly, a vertical guide pipe 1 is installed, an exhaust valve 2 is arranged at the upper part of the side wall of the vertical guide pipe 1, and a supporting platform 3 is arranged below the vertical guide pipe 1; then a left support plate 4 and a right support plate 5 which are distributed in parallel left and right are fixed on the upper surface of the supporting platform 3, a horizontal conduit 6 is transversely installed between the left support plate 4 and the right support plate 5, a discharge hopper 7 which is communicated with the horizontal conduit 6 and penetrates through the supporting platform 3 is fixed on the lower left side wall of the horizontal conduit 6, and a feed inlet which is communicated with the vertical conduit 1 is formed on the upper right side wall of the horizontal conduit; both ends of the horizontal conduit 6 are fixed with cover plates 8, the inner cavity is provided with a rotating shaft 9 which is rotatably arranged on the two cover plates 8 in a penetrating way, and the side wall of the rotating shaft 9 is fixed with a helical blade 11 positioned in the inner cavity of the horizontal conduit 6; two ends of the rotating shaft 9 respectively penetrate through the two cover plates 8, and two end parts of the rotating shaft 9 respectively rotatably penetrate through the upper parts of the left support plate 4 and the right support plate 5; then, a motor 10 with an output shaft facing left is arranged on the right side of the right support plate 5, and the output shaft of the motor 10 is connected with the right end part of the rotating shaft 9 through a coupler; finally, the low-level receiving hopper 12 is placed under the discharging hopper 7, so that the installation of the control device is completed;
s2: tube moistening: firstly, cement mortar is poured into the vertical guide pipe 1 from the upper part, and the exhaust valve 2 is opened for exhaust; when cement mortar is filled in the vertical guide pipe 1 and flows to the feeding port of the horizontal guide pipe 6, the motor 10 is started, the motor 10 drives the rotating shaft 9 to rotate in the forward direction, the helical blade 11 is driven to rotate in the forward direction, and therefore the cement mortar is pushed to move from right to left along the horizontal guide pipe 6 and then is led out from the discharging hopper 7, and pipe moistening operation is completed;
s3: discharging concrete: keeping the running state of the motor 10 unchanged, putting concrete into the vertical conduit 1 from above to ensure that the concrete is fully connected with cement mortar at the inlet of the vertical conduit 1, driving the rotating shaft 9 and the helical blades 11 to rotate positively under the driving of the motor 10 to drive the concrete to flow through the vertical conduit 1, the feeding port and the horizontal conduit 6 in sequence at a uniform speed, and finally leading out from the discharging hopper 7, thereby finishing the uniform-speed material putting of the concrete;
s4: and (3) interruption of concrete discharging: when the upper concrete truck needs to be replaced, the motor 10 is turned off in advance, so that a large amount of concrete is stored in the high-position storage hopper to seal the inlet of the vertical guide pipe 1, air is prevented from entering the vertical guide pipe 1, and the concrete in the vertical guide pipe 1 stops moving downwards under the resistance action of the helical blades 11; when the emptying interruption time is long or the height difference is large, the motor 10 is restarted, the output shaft of the motor 10 is driven to rotate reversely, the rotating shaft 9 and the helical blade 11 are driven to rotate reversely, the concrete is pushed upwards, and the concrete in the vertical conduit 1 is kept in a full state;
s5: and (3) recovering concrete discharging: concrete is continuously poured into the vertical conduit 1 from the upper part, the output shaft of the motor 10 is controlled to rotate positively, the rotating shaft 9 and the helical blade 11 are driven to rotate positively, and therefore normal concrete pouring is recovered.
A vertically arranged feeding pipe 13 is fixed at the feeding port of the horizontal guide pipe 6, and the upper end surface of the feeding pipe 13 is fixedly connected with the vertical guide pipe 1 through a flange. A vertically arranged corrugated pipe connected with the vertical conduit 1 and the feeding pipe 13 through flanges is arranged between the two. The horizontal guide pipe 6 comprises an upper pipe body and a lower pipe body which are butted up and down, a sealing gasket is arranged between the upper pipe body and the lower pipe body, and the upper pipe body and the lower pipe body are fixedly connected through a plurality of bolts; and bearings with inner rings fixed with the rotating shaft 9 are arranged on the upper part of the left support plate 4, the upper part of the right support plate 5 and the middle parts of the two cover plates 8. A cushion pad 14 is arranged at the bottom of the motor 10, and the base of the motor 10 is fixedly connected to the supporting platform 3 through a plurality of bolts I penetrating through the cushion pad 14; the bottom of the supporting platform 3 is provided with a plurality of supporting legs 15, the bottom of each supporting leg 15 is in threaded connection with a vertical screw 16, and a bottom plate 17 is fixed at the bottom of each vertical screw 16. The shaft coupling can be replaced by a speed reducer.
In the specific implementation process, the vertical guide pipe 1, the horizontal guide pipe 6 and the feeding pipe 13 are all made of thick-wall steel pipes; the horizontal guide pipe 6 and the feeding pipe 13 are mutually welded in a penetrating way, and the inner edge angle is polished to be smooth; the motor 10 is a low speed motor.
Claims (6)
1. A control method for preventing concrete segregation caused by downward conveying of concrete with large height difference is characterized by comprising the following steps: the method is realized by adopting the following steps:
s1: assembling the control device: firstly, a vertical guide pipe (1) is installed, an exhaust valve (2) is arranged at the upper part of the side wall of the vertical guide pipe (1), and a supporting platform (3) is arranged below the vertical guide pipe; then a left support plate (4) and a right support plate (5) which are distributed in parallel left and right are fixed on the upper surface of the supporting platform (3), a horizontal guide pipe (6) is transversely installed between the left support plate (4) and the right support plate (5), a discharge hopper (7) which is communicated with the horizontal guide pipe and penetrates through the supporting platform (3) is fixed on the lower left side wall of the horizontal guide pipe (6), and a feed inlet which is communicated with the vertical guide pipe (1) is formed in the upper right side wall of the horizontal guide pipe (6); both ends of the horizontal conduit (6) are fixed with cover plates (8), the inner cavity of the horizontal conduit is provided with a rotating shaft (9) which is rotatably arranged on the two cover plates (8), and the side wall of the rotating shaft (9) is fixed with a helical blade (11) which is positioned in the inner cavity of the horizontal conduit (6); two ends of the rotating shaft (9) respectively penetrate through the two cover plates (8), and two end parts of the rotating shaft (9) are respectively rotatably arranged on the upper parts of the left support plate (4) and the right support plate (5); then a motor (10) with an output shaft facing to the left is arranged on the right side of the right support plate (5), and the output shaft of the motor (10) is connected with the right end part of the rotating shaft (9) through a coupler; finally, the low-level receiving hopper (12) is placed under the discharging hopper (7), so that the control device is installed;
s2: tube moistening: firstly, cement mortar is poured into the vertical guide pipe (1) from the upper part, and the exhaust valve (2) is opened for exhaust; when cement mortar is filled in the vertical guide pipe (1) and flows to the feeding port of the horizontal guide pipe (6), starting the motor (10), driving the rotating shaft (9) to rotate in the positive direction by the motor (10), driving the helical blade (11) to rotate in the positive direction, pushing the cement mortar to move from right to left along the horizontal guide pipe (6), and then guiding out from the discharging hopper (7), thereby finishing pipe moistening operation;
s3: discharging concrete: keeping the running state of the motor (10) unchanged, putting concrete into the vertical conduit (1) from the upper part, enabling the concrete and cement mortar to be fully connected at the inlet of the vertical conduit (1), driving the motor (10) to rotate forward by the rotating shaft (9) and the helical blade (11) to drive the concrete to sequentially flow through the vertical conduit (1), the feeding port and the horizontal conduit (6) at a uniform speed, and finally leading out from the discharging hopper (7), thereby completing uniform-speed material putting of the concrete;
s4: and (3) interruption of concrete discharging: when the upper concrete truck needs to be replaced, the motor (10) is turned off in advance, so that a large amount of concrete is stored in the high-position storage hopper to seal the inlet of the vertical guide pipe (1) to prevent air from entering the vertical guide pipe (1), and the concrete in the vertical guide pipe (1) stops moving downwards under the resistance action of the helical blades (11); when the emptying interruption time is long or the height difference is large, the motor (10) is restarted, the output shaft of the motor (10) is driven to rotate reversely, the rotating shaft (9) and the helical blade (11) are driven to rotate reversely, the concrete is pushed upwards, and the concrete in the vertical conduit (1) is kept in a full state;
s5: and (3) recovering concrete discharging: concrete is continuously poured into the vertical conduit (1) from the upper direction, the output shaft of the motor (10) is controlled to rotate in the positive direction, the rotating shaft (9) and the helical blade (11) are driven to rotate in the positive direction, and therefore normal concrete pouring is recovered.
2. The large-step down feed concrete control method for preventing segregation of concrete according to claim 1, wherein: a vertically arranged feeding pipe (13) is fixed at a feeding port of the horizontal guide pipe (6), and the upper end surface of the feeding pipe (13) is fixedly connected with the vertical guide pipe (1) through a flange.
3. The large-step down feed concrete control method for preventing segregation of concrete according to claim 2, wherein: a vertically arranged corrugated pipe connected with the vertical guide pipe (1) and the feed pipe (13) through flanges is arranged between the two pipes.
4. The large-step down feed concrete control method for preventing segregation of concrete according to claim 1, wherein: the horizontal guide pipe (6) comprises an upper pipe body and a lower pipe body which are butted up and down, a sealing gasket is arranged between the upper pipe body and the lower pipe body, and the upper pipe body and the lower pipe body are fixedly connected through a plurality of bolts; and bearings with inner rings fixed with the rotating shaft (9) are arranged on the upper part of the left support plate (4), the upper part of the right support plate (5) and the middle parts of the two cover plates (8).
5. The large-step down feed concrete control method for preventing segregation of concrete according to claim 1, wherein: a cushion pad (14) is arranged at the bottom of the motor (10), and a base of the motor (10) is fixedly connected to the supporting platform (3) through a plurality of bolts I penetrating through the cushion pad (14); the bottom of the supporting platform (3) is provided with a plurality of supporting legs (15), the bottom of each supporting leg (15) is in threaded connection with a vertical screw (16), and a bottom plate (17) is fixed at the bottom of each vertical screw (16).
6. The large-step down feed concrete control method for preventing segregation of concrete according to claim 1, wherein: the shaft coupling can be replaced by a speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011363100.2A CN112431204A (en) | 2020-11-28 | 2020-11-28 | Control method for preventing concrete segregation caused by downward conveying of concrete with large height difference |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011363100.2A CN112431204A (en) | 2020-11-28 | 2020-11-28 | Control method for preventing concrete segregation caused by downward conveying of concrete with large height difference |
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| CN112431204A true CN112431204A (en) | 2021-03-02 |
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| CN202011363100.2A Pending CN112431204A (en) | 2020-11-28 | 2020-11-28 | Control method for preventing concrete segregation caused by downward conveying of concrete with large height difference |
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| US20060098526A1 (en) * | 2002-09-11 | 2006-05-11 | Hood George M | Mixing apparatus for concrete |
| CN106436713A (en) * | 2015-05-25 | 2017-02-22 | 中国建筑第八工程局有限公司 | Spiral buffer conveying pipeline used for conveying concrete deep downwards along vertical structure |
| CN106672465A (en) * | 2017-02-27 | 2017-05-17 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Horizontal type stirring storage bin and application method thereof |
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2020
- 2020-11-28 CN CN202011363100.2A patent/CN112431204A/en active Pending
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| US20060098526A1 (en) * | 2002-09-11 | 2006-05-11 | Hood George M | Mixing apparatus for concrete |
| CN106436713A (en) * | 2015-05-25 | 2017-02-22 | 中国建筑第八工程局有限公司 | Spiral buffer conveying pipeline used for conveying concrete deep downwards along vertical structure |
| CN106672465A (en) * | 2017-02-27 | 2017-05-17 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Horizontal type stirring storage bin and application method thereof |
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| CN208249379U (en) * | 2018-04-16 | 2018-12-18 | 贵州紫金矿业股份有限公司 | A kind of double helix feeding device |
| CN211590750U (en) * | 2019-11-15 | 2020-09-29 | 义乌市佰晟商品混凝土有限公司 | High-efficient discharging device of concrete mixing plant |
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