CN114161580A - Concrete on-site pumping vacuum stirring conveying pipe and construction process - Google Patents

Concrete on-site pumping vacuum stirring conveying pipe and construction process Download PDF

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Publication number
CN114161580A
CN114161580A CN202111140091.5A CN202111140091A CN114161580A CN 114161580 A CN114161580 A CN 114161580A CN 202111140091 A CN202111140091 A CN 202111140091A CN 114161580 A CN114161580 A CN 114161580A
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concrete
pipe body
pipe
discharge
communicated
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CN202111140091.5A
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CN114161580B (en
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欧志华
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Hunan University of Technology
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Hunan University of Technology
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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
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/34—Mixing on or by conveyors, e.g. by belts or chains provided with mixing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B28C7/162—Discharge means, e.g. with intermediate storage of fresh concrete by means of conveyors, other than those comprising skips or containers, e.g. endless belts, screws, air under pressure
    • B28C7/168—Discharging chutes for concrete mixers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Civil Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

The invention discloses a concrete on-site pumping vacuum stirring conveying pipe which comprises a feed hopper and a pipe body discharge port, wherein the feed hopper is communicated with a pipe body and is used for introducing concrete into the pipe body; the discharge port is communicated with one end of the pipe body, which is far away from the feeding position, and the discharge port is used for discharging concrete in the pipe body; the pipe body further comprises a feeding device, a first air pipe and a vacuum pump; the feeding device is used for forcing the concrete to move and stir in the pipe body; the first air pipe is communicated with the space in the pipe body and is used for being communicated with the vacuum pump, and the vacuum pump sucks air in the pipe body to enable the air pressure in the pipe body to be lower than the air pressure outside the pipe body. The concrete is subjected to vacuum bubble removal treatment before entering the pumping equipment. Thus, the air void content of the concrete is more controllable after it is poured into the building structure.

Description

Concrete on-site pumping vacuum stirring conveying pipe and construction process
Technical Field
The invention relates to a concrete on-site pumping auxiliary device and a construction process for carrying out concrete pumping by using the same.
Background
Concrete is a three-phase mixture of gas, liquid and solid in which gas is present in the hardened concrete structure as pores after the concrete is hardened. The pores can reduce the overall continuity of the concrete, stress concentration is formed on the inner walls of the pores when load is applied, cracks are usually formed at the stress concentration positions, and further the strength of the concrete structure is reduced and even damaged. In order to reduce the amount of air bubbles in the concrete, there are two ways, one is to add a defoaming agent, and the other is to stir the concrete in vacuum. The first mode has obvious effect in the stirring process, but in the process of conveying the concrete by the mixer truck after the concrete is stirred, the stirring of the concrete in the tank truck is still an open process, air is introduced to form new bubbles in the stirring process, the function of the defoaming agent is how much, and finally the gas content of the concrete after being pumped to a pouring point is lower, and the controllable degree is lower. The problem faced in practice with vacuum mixing is the same as adding defoaming agent, namely after mixing is completed, air is still introduced into the mixing of the tank truck during transportation, so that the final air content of the concrete is influenced by more factors. Factors such as the transportation time of the tank truck and the amount of concrete transported by a single truck influence the final air content of the concrete and finally influence the structural strength of the hardened concrete.
In the prior art, steel pipes are firstly vacuumized in concrete-filled steel pipe construction, and then concrete is pumped into the steel pipes in a vacuum environment, the method is only suitable for the concrete-filled steel pipe construction, and the process needs a sealing structure capable of bearing the vacuum environment, which is not suitable for common buildings. Therefore, in the common building construction, the controllable reduction of the gas content of the concrete has obvious help to improve the construction quality.
Disclosure of Invention
The embodiment of the application provides a concrete site pumping vacuum stirring conveying pipe and a construction process, solves the problem that air content is uncontrollable during concrete pouring in the prior art, and achieves the effect of controllable concrete exhaust.
The embodiment of the application provides a concrete on-site pumping vacuum stirring conveying pipe which comprises a feeding hopper and a pipe body discharge port, and is characterized in that the feeding hopper is communicated with the pipe body and is used for introducing concrete into the pipe body; the discharge port is communicated with one end of the pipe body, which is far away from the feeding position, and the discharge port is used for discharging concrete in the pipe body; the feeding hopper is provided with a feeding valve, and the feeding valve is used for closing and air-sealing a channel between the feeding hopper and the pipe body; the discharge port is provided with a discharge valve, and the discharge valve is used for closing and air-sealing a channel between the discharge port and the pipe body;
the pipe body further comprises a feeding device, a first air pipe and a vacuum pump;
the feeding device is used for forcing the concrete to move in the pipe body;
the first air pipe is communicated with the space in the pipe body and is used for being communicated with the vacuum pump, and the vacuum pump sucks air in the pipe body to enable the air pressure in the pipe body to be lower than the air pressure outside the pipe body.
The vacuum degree adjusting device comprises a pipe body, a first air pipe and a second air pipe, wherein the pipe body is provided with a vent valve; the vacuum gauge is characterized by further comprising a vacuum gauge, and the detection end of the vacuum gauge extends into the tube body and is used for detecting the vacuum degree in the tube body.
Furthermore, the feeding device is a spiral flow deflector driven by a motor, and the spiral flow deflector is positioned in the pipe body.
Furthermore, the axis of the pipe body and the horizontal plane form an included angle of 45-90 degrees;
the discharge end of the pipe body is provided with a connecting port and an exhaust part;
the connecting port is frustum-shaped, the connecting port is communicated with the arc-shaped or U-shaped exhaust part, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body;
the first air pipe is communicated with the top of the exhaust part.
Furthermore, the center of the top of the exhaust part is divided into an upper layer and a lower layer, the upper layer is a vacuum part, and the vacuum part is communicated with the first air pipe; the lower floor is reposition of redundant personnel portion, reposition of redundant personnel portion includes a plurality of passageways, and the passageway comprises narrow passageway and wide passageway interval, makes the concrete take place to deform in passageway department.
Furthermore, the discharge port is communicated with the other opening of the exhaust part, the discharge port extends downwards and extends into the discharge tank, the discharge tank is provided with an inclined lower side wall, and the opening at the bottom end of the discharge port is positioned above the lower side wall of the discharge tank, so that concrete slides to the bottom end of the discharge tank along the lower side wall; the bottom end of the discharge tank is provided with a discharge tank valve which is used for opening and closing a discharge opening of the discharge tank; the upper part of the discharge tank is fixedly communicated with a third air pipe, and the third air pipe is communicated with a vacuum pump.
A concrete on-site pumping vacuum stirring conveying process comprises the conveying pipe, and comprises the following steps:
1) quantitatively discharging the concrete into a feed hopper to enable the concrete to enter the pipe body;
2) closing channels for feeding and discharging materials at two ends of the tube body, and starting a vacuum pump to vacuumize the tube body;
3) and opening the discharging channel to convey the concrete to pumping equipment.
Furthermore, the feeding device is a spiral flow deflector driven by a motor, and the spiral flow deflector is positioned in the pipe body;
and in the step 2), the spiral flow deflectors are rotated positively and negatively to stir the concrete in the pipe body.
Furthermore, the axis of the pipe body and the horizontal plane form an included angle of 45-90 degrees;
the discharge end of the pipe body is provided with a connecting port and an exhaust part;
the connecting port is frustum-shaped, the connecting port is communicated with the arc-shaped or U-shaped exhaust part, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body;
the first air pipe is communicated with the top of the exhaust part;
the discharge port is communicated with the other opening of the exhaust part, the discharge port extends downwards and extends into the discharge tank, the discharge tank is provided with an inclined lower side wall, and the opening at the bottom end of the discharge port is positioned above the lower side wall of the discharge tank, so that concrete slides to the bottom end of the discharge tank along the lower side wall; the bottom end of the discharge tank is provided with a discharge tank valve which is used for opening and closing a discharge opening of the discharge tank; the upper part of the discharge tank is fixedly communicated with a third air pipe, and the third air pipe is communicated with a vacuum pump;
the discharging valves in the step 2) are opened and closed at intervals, when the volume of concrete in the exhaust part reaches 80% of the volume of the exhaust part, the discharging valves are opened, meanwhile, the feeding device is opened, when the concrete exhausted by the exhaust part through negative pressure enters the discharging tank, the discharging valves are closed, the discharging tank is vacuumized, and the vacuum degree in the discharging tank is greater than that in the exhaust part; and (5) exhausting gas in the discharge tank for 2-5min, and then opening a discharge tank valve.
Furthermore, the exhaust part is provided with a vacuum gauge and a second air pipe, the second air pipe is provided with an air valve, and the air valve is used for adjusting the vacuum degree in the exhaust part.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: the concrete is subjected to vacuum bubble removal treatment before entering the pumping equipment. Thus, the air void content of the concrete is more controllable after it is poured into the building structure. The air bubbles generated in the concrete during stirring and transportation can be discharged, and the concrete is prevented from introducing new air bubbles in the concrete during pumping.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic of the configuration with a discharge tank;
FIG. 3 is a schematic view of a connection port configuration;
FIG. 4 is a schematic view of the vent section;
fig. 5 is a plan view of the flow dividing portion.
In the figure, a feed hopper 100, a feed valve 110, a pipe 200, a feeding device 210, a first air pipe 220, a second air pipe 230, a vacuum pump 240, a vacuum gauge 250, a connection port 260, an exhaust portion 270, a vacuum portion 271, and a flow dividing portion 272;
a discharge port 300 and a discharge valve 310;
discharge tank 400, tank body 410, third gas pipe 420 and discharge tank valve 430
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The concrete is subjected to vacuum bubble removal treatment before entering the pumping equipment. Thus, the air void content of the concrete is more controllable after it is poured into the building structure.
Example one
As shown in fig. 1, the concrete on-site pumping vacuum mixing conveying pipe comprises a feed hopper 100 and a discharge port 300 of a pipe body 200, wherein the feed hopper 100 is communicated with the pipe body 200, and the feed hopper 100 is used for introducing concrete into the pipe body 200; the discharge hole 300 is communicated with one end of the pipe body 200 far away from the feeding position, and the discharge hole 300 is used for discharging concrete in the pipe body 200; the feed hopper 100 is provided with a feed valve 110, and the feed valve 110 is used for closing and hermetically sealing a channel between the feed hopper 100 and the pipe body 200; the discharge port 300 is provided with a discharge valve 310, and the discharge valve 310 is used for closing and hermetically sealing a channel between the discharge port 300 and the pipe body 200; the two ends of the pipeline are sealed by valves so as to form an airtight environment, and the subsequent vacuumizing operation is convenient.
The tube 200 further comprises a feeding device 210, a first air tube 220 and a vacuum pump 240;
the feeding device 210 is used for forcing the concrete to move and stir in the pipe body 200; the feeding device 210 may have various options, such as a screw feeder, a rotary rake, a belt, and a guide vane fixed on the inner wall of the tube. The mode of screw feeder is the spiral water conservancy diversion piece that the motor drove, and the spiral water conservancy diversion piece is located body 200, and this kind of mode has a benefit, is exactly that the concrete can reciprocating motion, reaches the purpose of stirring concrete.
The first air pipe 220 is communicated with the space in the tube body 200, the first air pipe 220 is communicated with the vacuum pump 240, and the vacuum pump 240 is used for sucking air in the tube body 200, so that the air pressure in the tube body 200 is lower than the air pressure outside the tube body 200, and the air pressure in the tube body is in the range of 0-96 kpa.
In order to conveniently control the air pressure in the tube body 200, a second air tube 230 is added, the second air tube 230 is communicated with the tube body 200, a vent valve is arranged on the second air tube 230, and the second air tube 230 is used for adjusting the vacuum degree in the tube body 200; the vacuum gauge is characterized by further comprising a vacuum gauge 250, wherein the detection end of the vacuum gauge extends into the pipe body 200 and is used for detecting the vacuum degree in the pipe body 200. The vent valve can be loosened when the vacuum degree is too high. The vacuum pump 240 continues to operate if the vacuum level is not sufficient.
Example two
As shown in fig. 2-5, if the pipe body 200 is horizontally arranged and the spiral feeding device is used, when the concrete is stirred, the pressure of the bubbles wrapped in the concrete is higher than the air pressure in the pipe body 200, and the bubbles can be quickly broken and discharged, but the vacuum-pumping equipment is too high in cost when being pumped to a state completely without air, so that air still exists in the pipe body during normal operation. When the concrete is mixed in the range of the screw feeder, the concrete covers the air in the pipe body 200, and although the air pressure is lower than that of the outside, a small amount of air enters the concrete, and a small amount of air bubbles are formed in the concrete after the air enters the concrete. Therefore, the apparatus is modified in order to reduce or avoid re-entry of air after bubble removal.
The axis of the pipe body 200 forms an included angle of 45-90 degrees with the horizontal plane; concrete can seal the body when upwards carrying like this, and the concrete that is located the top can be in the state of vacuum suction all the time.
The discharge end of the pipe body 200 is provided with a connecting port 260 and an exhaust part 270;
the connecting port 260 is in a frustum shape, the connecting port 260 is communicated with an arc-shaped or U-shaped exhaust part 270, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body 200; the concrete is extruded into a cake shape, after entering the exhaust part 270, more areas contacting the negative pressure environment exist, and more internal bubbles can float upwards or break away.
The first air pipe 220 is communicated with the top of the air discharging part 270, and concrete is sucked by the first air pipe 220 if directly entering the air discharging part 270, so that the top of the air discharging part 270 is preferably curved, but the bottom surface is flat, increasing space and not hindering the movement of the concrete. The exhaust unit 270 may be inclined to incline the bottom surface of the chamber, so as to prevent the first air pipe 220 from being clogged by concrete.
In practical use tests, it was found that the concrete had a cake shape, and if the thickness of the concrete layer was not large, for example, not more than 2 times the maximum particle size of the coarse aggregate, the exhaust efficiency was very good. However, if the concrete has a poor fluidity and a thick concrete layer, and is slightly segregated, the mortar is easily hardened on the top surface of the top of the air discharging part 270, and air bubbles between the hardened mortar and the bottom surface of the top of the air discharging part 270 are hardly discharged. Therefore, the center of the top of the exhaust part 270 is divided into an upper layer and a lower layer, the upper layer is a vacuum part 271, and the vacuum part 271 is communicated with the first air pipe 220; the lower layer is a flow dividing part 272, the flow dividing part 272 comprises a plurality of channels, and the channels are formed by spacing narrow channels 2721 and wide channels 2722, so that the concrete deforms in the channels. Therefore, the concrete is extruded after entering the channel, the mortar moves up and down, the vertical surface area contacted with the vacuum environment when entering the narrow channel is enlarged, and the bubble discharge is facilitated.
EXAMPLE III
As shown in fig. 2-5, the discharge port 300 is communicated with another opening of the exhaust part 270, the discharge port 300 extends downward and extends into the discharge tank 400, the discharge tank 400 has an inclined lower side wall, and the opening at the bottom end of the discharge port 300 is located above the lower side wall of the discharge tank 400, so that the concrete slides along the lower side wall to the bottom end of the discharge tank 400; the bottom end of the discharge tank 400 is provided with a discharge tank valve 430, and the discharge tank valve is used for opening and closing a discharge port of the discharge tank 400; the upper part of the material discharge tank 400 is fixedly communicated with a third air pipe 420, and the third air pipe 420 is communicated with a vacuum pump 240. Arrange the effect of material jar 400 and be the buffering concrete on the one hand, be convenient for get into pumping equipment in succession, on the other hand, the vacuum degree of exhaust portion 270 should not be too big because the concrete will divide and carry out vacuum row bubble many times, but can remain higher vacuum degree throughout in arranging material jar 400, further arrange the bubble on the one hand, on the other hand, after the concrete gets into row material jar, exhaust portion and arrange and be linked together between the material jar, exhaust portion 270 need not carry out the secondary vacuum pumping operation again.
A concrete on-site pumping vacuum mixing and conveying process, which comprises the conveying pipe in the first embodiment, and comprises the following steps:
1) a feed hopper into which the concrete is discharged quantitatively, so that the concrete enters the pipe body 200;
2) closing the channels for feeding and discharging materials at the two ends of the tube body, and starting a vacuum pump to vacuumize the tube body 200;
3) and opening the discharging channel to convey the concrete to pumping equipment.
The feeding device 210 is a spiral flow deflector driven by a motor, and the spiral flow deflector is positioned in the pipe body 200;
and in the step 2), the spiral flow deflectors are rotated positively and negatively to stir the concrete in the pipe body.
When the device is the device described in the third embodiment, the axis of the pipe body 200 forms an included angle of 45-90 degrees with the horizontal plane;
the discharge end of the pipe body 200 is provided with a connecting port 260 and an exhaust part 270;
the connecting port 260 is in a frustum shape, the connecting port 260 is communicated with an arc-shaped or U-shaped exhaust part 270, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body 200;
the first air pipe 220 is communicated with the top of the exhaust part 270;
the discharge port 300 is communicated with the other opening of the exhaust part 270, the discharge port 300 extends downwards and extends into the discharge tank 400, the discharge tank 400 is provided with an inclined lower side wall, the opening at the bottom end of the discharge port 300 is positioned above the lower side wall of the discharge tank 400, so that concrete slides to the bottom end of the discharge tank 400 along the lower side wall; the bottom end of the discharge tank 400 is provided with a discharge tank valve 430, and the discharge tank valve is used for opening and closing a discharge port of the discharge tank 400; the upper part of the discharge tank 400 is fixedly communicated with a third air pipe 420, and the third air pipe 420 is communicated with a vacuum pump 240;
step 2) opening and closing the discharge valve 310 at intervals, opening the discharge valve 310 when the volume of the concrete in the exhaust part 270 reaches 80% of the volume of the exhaust part (the exhaust part can be provided with a transparent observation window), simultaneously opening the feeding device 210 (the feeding device is used for extruding and pushing the concrete out of the exhaust part 270), closing the discharge valve 310 after the concrete exhausted by the exhaust part 270 under negative pressure enters the discharge tank 400, vacuumizing the discharge tank 400, and enabling the vacuum degree in the discharge tank 400 to be larger than the vacuum degree in the exhaust part 270; the discharge tank valve 430 is opened after 2-5min of venting in the discharge tank 400.
Of course, the exhaust unit 270 is preferably provided with a vacuum gauge 250 and a second air pipe 230, and the second air pipe 230 is provided with an air valve for adjusting the vacuum degree in the exhaust unit 270. In addition, the discharge tank preferably has a vacuum gauge and a vent pipe for adjusting the degree of vacuum.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A concrete on-site pumping vacuum stirring conveying pipe comprises a feed hopper and a pipe body discharge port, and is characterized in that the feed hopper is communicated with a pipe body and is used for introducing concrete into the pipe body; the discharge port is communicated with one end of the pipe body, which is far away from the feeding position, and the discharge port is used for discharging concrete in the pipe body; the feeding hopper is provided with a feeding valve, and the feeding valve is used for closing and air-sealing a channel between the feeding hopper and the pipe body; the discharge port is provided with a discharge valve, and the discharge valve is used for closing and air-sealing a channel between the discharge port and the pipe body;
the pipe body further comprises a feeding device, a first air pipe and a vacuum pump;
the feeding device is used for forcing the concrete to move and stir in the pipe body;
the first air pipe is communicated with the space in the pipe body and is used for being communicated with the vacuum pump, and the vacuum pump sucks air in the pipe body to enable the air pressure in the pipe body to be lower than the air pressure outside the pipe body.
2. The concrete on-site pumping vacuum mixing conveying pipe according to claim 1, further comprising a second air pipe, wherein the second air pipe is communicated with the pipe body, a vent valve is arranged on the second air pipe, and the second air pipe is used for adjusting the vacuum degree in the pipe body; the vacuum gauge is characterized by further comprising a vacuum gauge, and the detection end of the vacuum gauge extends into the tube body and is used for detecting the vacuum degree in the tube body.
3. The concrete on-site pumping vacuum mixing conveying pipe according to claim 1, wherein the feeding device is a motor-driven spiral deflector, and the spiral deflector is positioned in the pipe body.
4. The concrete on-site pumping vacuum mixing delivery pipe of claim 1, wherein the axis of the pipe body forms an included angle of 45-90 degrees with the horizontal plane;
the discharge end of the pipe body is provided with a connecting port and an exhaust part;
the connecting port is frustum-shaped, the connecting port is communicated with the arc-shaped or U-shaped exhaust part, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body;
the first air pipe is communicated with the top of the exhaust part.
5. The concrete on-site pumping vacuum mixing conveying pipe according to claim 4, wherein the top center of the exhaust part is divided into an upper layer and a lower layer, the upper layer is a vacuum part, and the vacuum part is communicated with the first air pipe; the lower floor is reposition of redundant personnel portion, reposition of redundant personnel portion includes a plurality of passageways, and the passageway comprises narrow passageway and wide passageway interval, makes the concrete take place to deform in the passageway.
6. The concrete on-site pumping vacuum mixing delivery pipe according to claim 4, wherein the discharge port is communicated with another opening of the exhaust part, the discharge port extends downwards and extends into the discharge tank, the discharge tank is provided with an inclined lower side wall, and the opening at the bottom end of the discharge port is positioned above the lower side wall of the discharge tank, so that concrete slides along the lower side wall to the bottom end of the discharge tank; the bottom end of the discharge tank is provided with a discharge tank valve which is used for opening and closing a discharge opening of the discharge tank; the upper part of the discharge tank is fixedly communicated with a third air pipe, and the third air pipe is communicated with a vacuum pump.
7. A concrete pump-in-place vacuum mixing delivery process, comprising the delivery tube of claim 1, comprising the steps of:
1) quantitatively discharging the concrete into a feed hopper to enable the concrete to enter the pipe body;
2) closing channels for feeding and discharging materials at two ends of the tube body, and starting a vacuum pump to vacuumize the tube body;
3) and opening the discharging channel to convey the concrete to pumping equipment or a storage tank.
8. The concrete on-site pumping vacuum stirring and conveying process as claimed in claim 7, wherein the feeding device is a motor-driven spiral flow deflector, and the spiral flow deflector is positioned in the pipe body;
and in the step 2), the spiral flow deflectors are rotated positively and negatively to stir and convey the concrete in the pipe body.
9. The concrete pump-in-place vacuum mixing delivery process as set forth in claim 7,
the axis of the pipe body forms an included angle of 45-90 degrees with the horizontal plane;
the discharge end of the pipe body is provided with a connecting port and an exhaust part;
the connecting port is frustum-shaped, the connecting port is communicated with the arc-shaped or U-shaped exhaust part, openings at two ends of the exhaust part face downwards, the openings are square, and the opening area is not larger than the radial cross-sectional area of the pipe body;
the first air pipe is communicated with the top of the exhaust part;
the discharge port is communicated with the other opening of the exhaust part, the discharge port extends downwards and extends into the discharge tank, the discharge tank is provided with an inclined lower side wall, and the opening at the bottom end of the discharge port is positioned above the lower side wall of the discharge tank, so that concrete slides to the bottom end of the discharge tank along the lower side wall; the bottom end of the discharge tank is provided with a discharge tank valve which is used for opening and closing a discharge opening of the discharge tank; the upper part of the discharge tank is fixedly communicated with a third air pipe, and the third air pipe is communicated with a vacuum pump;
the discharging valves in the step 2) are opened and closed at intervals, when the volume of concrete in the exhaust part reaches 80% of the volume of the exhaust part, the discharging valves are opened, meanwhile, the feeding device is opened, when the concrete exhausted by the exhaust part through negative pressure enters the discharging tank, the discharging valves are closed, the discharging tank is vacuumized, and the vacuum degree in the discharging tank is greater than that in the exhaust part; and (5) exhausting gas in the discharge tank for 2-5min, and then opening a discharge tank valve.
10. The concrete pump vacuum mixing delivery process of claim 9, wherein the exhaust section comprises a vacuum gauge and a second air pipe, and the second air pipe comprises an air valve for adjusting the vacuum degree in the exhaust section.
CN202111140091.5A 2021-09-28 2021-09-28 Concrete on-site pumping vacuum stirring conveying pipe and construction process Active CN114161580B (en)

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CN114161580B CN114161580B (en) 2023-05-05

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006225080A1 (en) * 2005-03-18 2006-09-21 L.M. & L.M. Knight Pty Ltd Slurry recovery and separation
CN106863595A (en) * 2017-03-02 2017-06-20 湖南工业大学 Concrete pressure blender and concrete pressure stirring technique
CN108661671A (en) * 2018-05-16 2018-10-16 中铁十七局集团第三工程有限公司 Tunnel vault two serves as a contrast concrete vacuum and assists pouring procedure
CN111318203A (en) * 2020-03-23 2020-06-23 珠海市赫尔墨斯真空技术有限公司 Vacuum conveying and mixing system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006225080A1 (en) * 2005-03-18 2006-09-21 L.M. & L.M. Knight Pty Ltd Slurry recovery and separation
CN106863595A (en) * 2017-03-02 2017-06-20 湖南工业大学 Concrete pressure blender and concrete pressure stirring technique
CN108661671A (en) * 2018-05-16 2018-10-16 中铁十七局集团第三工程有限公司 Tunnel vault two serves as a contrast concrete vacuum and assists pouring procedure
CN111318203A (en) * 2020-03-23 2020-06-23 珠海市赫尔墨斯真空技术有限公司 Vacuum conveying and mixing system

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