CN109676752B - Porous cement pipe and manufacturing process thereof - Google Patents
Porous cement pipe and manufacturing process thereof Download PDFInfo
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- CN109676752B CN109676752B CN201811470866.3A CN201811470866A CN109676752B CN 109676752 B CN109676752 B CN 109676752B CN 201811470866 A CN201811470866 A CN 201811470866A CN 109676752 B CN109676752 B CN 109676752B
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- 239000004568 cement Substances 0.000 title claims abstract description 101
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000004567 concrete Substances 0.000 claims abstract description 48
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004575 stone Substances 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000001723 curing Methods 0.000 claims description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 18
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 239000002585 base Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/153—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses a porous cement pipe and a manufacturing process thereof, belonging to the technical field of porous cement pipe, the porous cement pipe comprises a porous cement pipe, the porous cement pipe is provided with a plurality of uniformly distributed through holes which penetrate through the through holes up and down, the inside of the porous cement pipe is fixedly connected with a plurality of uniformly distributed reinforcing steel bars, the diameter of each reinforcing steel bar is 4-8 mm, the porous cement pipe is made of concrete, the strength grade of the concrete is C30, the raw material of the concrete comprises water, cement, sand, stones and concrete additives, the cement surplus coefficient of the concrete is 1.00, the maximum grain diameter of coarse aggregate is 20 mm, the tower strength is 35-50 mm, and the sand rate is 28-30%, the purposes of reasonably increasing the porosity in the cement pipe production process, greatly enhancing the strength of the cement pipe and greatly reducing the use amount of cement materials are achieved, and the solidification time is greatly reduced, the production efficiency is improved, the weight of the cement pipe is reduced, and the transportation cost can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of porous cement pipe making, in particular to a porous cement pipe making and a manufacturing process thereof.
Background
The cement pipe is a preset pipeline which is made of cement and reinforcing steel bars and is manufactured by applying the principle of telegraph pole centrifugal force. The cement pipeline is also called cement pressure pipe and reinforced concrete pipe, and can be used as sewer pipe in urban construction foundation, and can discharge sewage, flood control and drainage, and water supply pipe and farmland pumping well used in some special factories and mines. The method generally comprises the following steps: the reinforced concrete pipe with the flat mouth, the reinforced concrete pipe with the flexible tongue-and-groove mouth, the reinforced concrete pipe with the bell and spigot mouth, the cement pipe with the F-shaped steel bell mouth, the cement pipe with the flat mouth lantern ring interface, the cement pipe with the tongue-and-groove mouth and the like.
The technology for manufacturing the cement pipe comprises three technologies of centrifugal pipe manufacturing, suspension roll pipe manufacturing and core mould vibration, the core mould vibration pipe manufacturing is commonly used in the prior art, because the vertical core mould vibration pipe manufacturing technology adopts an inner integral pipe mould and an outer integral pipe mould, the rigidity of the moulds is very good and the moulds are not easy to deform, and only one set of mould is needed for one specification, the roundness and the pipe diameter of the formed concrete pipe are standard, a pipe body does not have a joint seam, and the finish degree of the inner wall of the pipe is obviously improved compared with the centrifugal technology and the suspension roll technology. In addition, the vertical core mould vibration pipe making process rotates and extrudes the concrete again in the axial direction after the concrete feeding is finished, so that the strength and the verticality of the pipe opening are effectively increased, and the construction and installation are smooth.
Middle-size and small-size cement pipe wall among the prior art generally all is solid, the centre does not have the hole, because the characteristic after cement solidifies, stress between each other is too big, and stress cement pipe self between this kind of material can't disperse or eliminate, just lead to this kind of structure can not bear very strong external force, the broken condition can appear under many situations, and a lot of cement materials have been wasted, the increase of cost has been led to, but the intensity of promotion cement pipe that can't be fine, a lot of manpower and materials have been wasted, and need longer time to solidify, the production efficiency is influenced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a porous cement pipe and a manufacturing process thereof, which can increase the porosity in the production process of the cement pipe reasonably, greatly enhance the strength of the cement pipe, greatly reduce the use amount of cement materials, greatly reduce the setting time, improve the production efficiency, reduce the weight of the cement pipe and further greatly reduce the transportation cost.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a porous cement tubulation and preparation technology thereof, includes the porous cement pipe, be equipped with a plurality of evenly distributed's through-hole on the porous cement pipe, run through from top to bottom the through-hole, a plurality of evenly distributed's of the inside fixedly connected with reinforcing bar of porous cement pipe, the diameter of reinforcing bar is 4-8 millimeters, the material of porous cement pipe is the concrete, the intensity grade of concrete is C30, and it can realize increasing porosely through reasonable in cement pipe production process, strengthens the intensity of cement pipe by a wide margin, reduces cement material's use amount by a wide margin, has reduced the time of solidifying moreover by a wide margin, has promoted the efficiency of production, has alleviateed the weight of cement pipe, and then can reduce cost of transportation by a wide margin.
A porous cement pipe is manufactured by the following manufacturing process: the method comprises the following steps:
step one, assembling a die: placing a pair of half outer pipe molds on a base plate and combining and fixing the half outer pipe molds to form a full outer pipe mold, placing an inner pipe mold in the full outer pipe mold, fixing the half outer pipe mold and the inner pipe mold on the base plate, then penetrating a plurality of reinforcing steel bars through reinforcing steel bar through holes until the upper ends of the reinforcing steel bars penetrate through the space between the half outer pipe mold and the inner pipe mold and are positioned at the upper sides of the half outer pipe mold and the inner pipe mold, fixing the reinforcing steel bars by using a tool, and finally extending a plurality of vibration columns into the space between the half outer pipe mold and the inner pipe mold until the lower ends of the vibration columns are contacted with the base plate;
step two, concrete pouring: pouring concrete with the strength of C30 between the pair of half outer pipe molds and the inner pipe mold, and starting the vibration column to vibrate the vibration column during pouring until the pouring is finished;
step three, generating a through hole: standing for 1-3 hours at normal temperature, starting the vibration column again, and simultaneously pulling out the vibration column from the space between the half outer pipe mold and the inner pipe mold until the vibration column is completely separated from the concrete poured in the step two;
step four, maintaining and demolding: maintaining according to a conventional maintenance method, detaching a pair of half outer pipe molds during demolding, cutting off redundant reinforcing steel bars, taking out the inner pipe mold, completing demolding, frequently sprinkling water to the porous cement pipe after demolding, continuously maintaining, covering with a film, and continuously maintaining for more than one week to prevent concrete from drying and cracking;
step five, inspecting and leaving factory: the product delivery inspection items comprise concrete compressive strength, appearance quality, size deviation, internal water pressure and external pressure inspection, and the product can be delivered after the product quality inspection is qualified.
Further, the raw materials of the concrete comprise water, cement, sand, stones and concrete additives.
Furthermore, the cement surplus coefficient of the concrete is 1.00, the maximum particle size of coarse aggregate is 20 mm, the tower density is 35-50 mm, the sand rate is 28-30%, and the water-cement ratio is 0.36-0.39.
Furthermore, it is a plurality of the upside of vibrations post is equipped with lifting mechanism, lifting mechanism and vibrations post fixed connection are convenient for realize the synchronous rising and the decline of a plurality of vibrations posts.
Further, the outer fixed surface of half outer tube mould is connected with a plurality of evenly distributed's vertical strengthening rib and horizontal strengthening rib, and vertical strengthening rib and horizontal strengthening rib crisscross distribution, and the material that reducible mould used can increase the intensity of mould simultaneously by a wide margin.
It is further, a pair of the fixed block that equal fixedly connected with matches each other on the half outer tube mould, it has a pair of joint hole to cut on the fixed block, and accessible fixed block and joint hole are with a pair of half outer tube mould joint and fixed, the equipment and the dismantlement of being convenient for.
Further, the material of half outer tube mould and inner tube mould is the mould steel, all be equipped with polishing layer on the inside wall of half outer tube mould and the lateral wall of inner tube mould, the mould steel performance is good, can satisfy the demand of using, and polishing layer can reduce the degree of difficulty of die sinking, easily die sinking.
Furthermore, the surface of the vibration column is coated with a polytetrafluoroethylene coating, the thickness of the polytetrafluoroethylene coating is 0.5-1.5 mm, the polytetrafluoroethylene material is stable in property, the friction coefficient is extremely low, the vibration column can be conveniently pulled out, the influence on the stability of concrete can be greatly reduced, and meanwhile, the quality of a through hole is conveniently ensured.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme can realize increasing porosely through reasonable in cement pipe production process, strengthens the intensity of cement pipe by a wide margin, reduces the use amount of cement material by a wide margin, has reduced the time of solidifying moreover by a wide margin, has promoted the efficiency of production, has alleviateed the weight of cement pipe, and then can reduce cost of transportation by a wide margin.
(2) The lifting mechanism is arranged on the upper sides of the vibration columns and fixedly connected with the vibration columns, so that synchronous rising and falling of the vibration columns are facilitated.
(3) The outer fixed surface of half outer tube mould is connected with a plurality of evenly distributed's vertical strengthening rib and horizontal strengthening rib, and vertical strengthening rib and the crisscross distribution of horizontal strengthening rib, and the material that reducible mould used can increase the intensity of mould simultaneously by a wide margin.
(4) The fixing blocks which are matched with each other are fixedly connected to the half outer pipe die, a pair of clamping holes are formed in the fixing blocks, and the half outer pipe die can be clamped and fixed through the fixing blocks and the clamping holes, so that the half outer pipe die is convenient to assemble and disassemble.
(5) The material of half outer tube mould and inner tube mould is the mould steel, all is equipped with polishing layer on the inside wall of half outer tube mould and the lateral wall of inner tube mould, and the mould steel performance is good, can satisfy the demand of using, and polishing layer can reduce the degree of difficulty of die sinking, easily die sinking.
(6) The surface of the vibration column is coated with a polytetrafluoroethylene coating, the thickness of the polytetrafluoroethylene coating is 0.5-1.5 mm, the polytetrafluoroethylene material is stable in property, the friction coefficient is extremely low, the vibration column can be conveniently pulled out, the influence on the stability of concrete can be greatly reduced, and meanwhile, the quality of a through hole is conveniently ensured.
Drawings
FIG. 1 is a first schematic structural diagram of a porous cement pipe manufacturing apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a second apparatus for manufacturing a porous cement pipe according to the present invention;
FIG. 3 is a schematic structural view of a porous cement pipe according to the present invention;
FIG. 4 is a top view of a porous cement tube of the present invention;
FIG. 5 is a partially exploded view of the present invention;
FIG. 6 is a process flow diagram of the present invention.
The reference numbers in the figures illustrate:
the concrete pipe comprises a porous cement pipe 1, a through hole 2, a reinforcing steel bar 3, a half outer pipe mould 4, a vertical reinforcing steel bar 5, a horizontal reinforcing steel bar 6, a fixing block 7, a clamping hole 8, a base plate 9, an inner pipe mould 10, a lifting mechanism 11, a vibration column 12 and a reinforcing steel bar through hole 13.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 3-4, a porous cement pipe includes a porous cement pipe 1, a plurality of through holes 2 uniformly distributed are formed in the porous cement pipe 1, the through holes 2 penetrate through the porous cement pipe from top to bottom, a plurality of reinforcing bars 3 uniformly distributed are fixedly connected to the inside of the porous cement pipe 1, and the diameter of each reinforcing bar 3 is 4-8 mm.
The porous cement pipe 1 is made of concrete, the strength grade of the concrete is C30, the raw materials of the concrete comprise water, cement, sand, stones and concrete additives, the cement surplus coefficient of the concrete is 1.00, the maximum particle size of coarse aggregate is 20 mm, the talo degree is 35-50 mm, the sand rate is 28-30%, the water cement ratio is 0.36-0.39, and the concrete reference mixing ratio is as follows: cement: sand: stone: water 1: 1.54:2.88:0.43, and the concrete capacity is 2400kg/m 3; the dosage of the cement is 410kg/m 3; sand: 632kg/m 3; stone: 1181kg/m 3; water: 175kg/m 3; sand rate: 35 percent; the slump constant of the concrete is 10-30mm after the concrete is adopted after laboratory trial mixing verification.
Cement: PO42.5 or 42.5R grade, the alkali content meets the requirement of low-alkali cement, and the leaving time is shorter than 3 months. Sand: the fineness modulus Mx of the river sand is 2.3-3.0, and the mud content and the mud block content must meet the standard specification requirements. Stone: mechanically crushed stone, continuous size fraction, specification: 5-20 mm, and each index must meet the standard specification requirement. And adjusting the actual metering value of the batching machine according to the design mixing ratio. The metering precision error of the cement is not more than 2 percent, and the metering error of the sand and the stone is not more than 3 percent; the stirring time is determined according to the type of the stirrer, and the stirrer can be a single-drum stirrer or a double-drum stirrer, and the stirring time is not less than 2 minutes. In winter, heat preservation measures are required, and sand and stone can not be frozen.
Referring to fig. 6, a porous cement pipe is manufactured by the following steps: the method comprises the following steps:
step one, assembling a die: placing a pair of half outer pipe molds 4 on a base plate 9 and combining and fixing the half outer pipe molds 4 to form a full outer pipe mold, placing an inner pipe mold 10 in the full outer pipe mold, fixing the half outer pipe molds 4 and the inner pipe mold 10 on the base plate 9, then enabling a plurality of reinforcing steel bars 3 to penetrate through reinforcing steel bar through holes 13 until the upper ends of the reinforcing steel bars 3 penetrate through the space between the half outer pipe mold 4 and the inner pipe mold 10 and are positioned at the upper sides of the half outer pipe mold 4 and the inner pipe mold 10, fixing the reinforcing steel bars 3 by using a tool, and finally enabling a plurality of vibration columns 12 to extend into the space between the half outer pipe mold 4 and the inner pipe mold 10 until the lower ends of the vibration columns 12 are in contact with the;
step two, concrete pouring: pouring concrete with the strength of C30 between the pair of half outer pipe molds 4 and the inner pipe mold 10, and starting the vibration column 12 during pouring to vibrate the vibration column 12 until the pouring is finished;
step three, generating a through hole: standing for 1-3 hours at normal temperature, starting the vibration column 12 again, and simultaneously pulling out the vibration column 12 from between the half outer pipe mold 4 and the inner pipe mold 10 until the vibration column 12 is completely separated from the concrete poured in the step two;
step four, maintaining and demolding: maintaining according to a conventional maintenance method, detaching a pair of half outer pipe molds 4 during demolding, shearing off redundant reinforcing steel bars 3, taking out the inner pipe mold 10, completing demolding, frequently spraying water to the porous cement pipe 1 after demolding, continuously maintaining, covering with a film, and continuously maintaining for more than one week to prevent concrete from dry cracking;
the curing can also adopt steam curing, and the steam curing after the porous cement pipe 1 is formed can be completed at one time, namely, the demoulding is not needed in the middle of the curing. Placing the formed porous cement pipe 1 into a steam curing pool and a pool cover for curing, wherein the steam curing temperature is controlled to be 80-85 ℃; in order to avoid the cracking of the concrete of the porous cement pipe 1, the static stop time of the porous cement pipe 1 is ensured at the initial stage of the forming of the porous cement pipe 1, steam is slowly released and the temperature is gradually raised at the initial stage of the steam curing of the porous cement pipe 1, and the maintenance of the porous cement pipe 1 is strictly carried out according to the static stop, the temperature rise, the constant temperature and the natural temperature reduction. The maintenance system is as follows: the method comprises four stages of standing, temperature rising, constant temperature and temperature lowering.
Wherein the standing refers to that the porous cement pipe 1 is placed for 1-2 hours at normal temperature after being formed, the temperature rise refers to that the temperature rise is not more than 25 ℃ per hour, the time lasts for 2-4 hours, the constant temperature refers to that the constant temperature time is different according to the efficiency of a steam-curing pit, the variety of cement and the condition of admixture doping, and the pipe wall thickness is different, so that the strength of the demoulded concrete is guaranteed to be standard and is generally not less than 3 hours. Constant temperature maximum temperature: portland cement 80 deg.C, ordinary Portland cement 85 deg.C, and slag Portland cement 95 deg.C.
Step five, inspecting and leaving factory: the product delivery inspection items comprise concrete compressive strength, appearance quality, size deviation, internal water pressure and external pressure inspection, and the product can be delivered after the product quality inspection is qualified.
Referring to fig. 1-5, a lifting mechanism 11 is disposed on the upper side of the vibrating columns 12, and the lifting mechanism 11 is fixedly connected to the vibrating columns 12, so as to facilitate the synchronous ascending and descending of the vibrating columns 12. The utility model discloses a semi-outer pipe mould 4, the outer fixed surface of semi-outer pipe mould 4 is connected with a plurality of evenly distributed's vertical strengthening rib 5 and horizontal strengthening rib 6, and vertical strengthening rib 5 and the crisscross distribution of horizontal strengthening rib 6, the material that reducible mould used, can increase the intensity of mould simultaneously by a wide margin, equal fixedly connected with fixed block 7 that matches each other on a pair of semi-outer pipe mould 4, it has a pair of joint hole 8 to cut on the fixed block 7, accessible fixed block 7 and joint hole 8 are with a pair of semi-outer pipe mould 4 joint and fixed, be convenient for assemble and dismantle.
Half outer tube mould 4 and inner tube mould 10's material are the mould steel, all are equipped with the polishing layer on half outer tube mould 4's the inside wall and the lateral wall of inner tube mould 10, and the mould steel performance is good, can satisfy the demand of using, and the polishing layer can reduce the degree of difficulty of die sinking, easily die sinking. The surface of the vibration column 12 is coated with a polytetrafluoroethylene coating, the thickness of the polytetrafluoroethylene coating is 0.5-1.5 mm, the polytetrafluoroethylene material is stable in property, the friction coefficient is extremely low, the vibration column 12 can be conveniently pulled out, the influence on the stability of concrete can be greatly reduced, and meanwhile, the quality of a through hole is conveniently ensured.
This scheme can realize increasing porosely through reasonable in cement pipe production process, strengthens the intensity of cement pipe by a wide margin, reduces the use amount of cement material by a wide margin, has reduced the time of solidifying moreover by a wide margin, has promoted the efficiency of production, has alleviateed the weight of cement pipe, and then can reduce cost of transportation by a wide margin.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (3)
1. A porous cement pipe, comprising a porous cement pipe (1), characterized in that: the porous cement pipe (1) is provided with a plurality of uniformly distributed through holes (2), the through holes (2) penetrate through the porous cement pipe up and down, a plurality of uniformly distributed reinforcing steel bars (3) are fixedly connected inside the porous cement pipe (1), the diameter of each reinforcing steel bar (3) is 4-8 mm, the porous cement pipe (1) is made of concrete, and the strength grade of the concrete is C30;
a porous cement pipe is characterized in that the manufacturing process comprises the following steps: the method comprises the following steps:
step one, assembling a die: placing a pair of semi-outer pipe molds (4) on a base plate (9) and combining and fixing the semi-outer pipe molds to form a full-outer pipe mold, placing an inner pipe mold (10) inside the full-outer pipe mold, fixing the semi-outer pipe mold (4) and the inner pipe mold (10) on the base plate (9), then enabling a plurality of reinforcing steel bars (3) to penetrate through reinforcing steel bar through holes (13) until the upper ends of the reinforcing steel bars (3) penetrate through the space between the semi-outer pipe mold (4) and the inner pipe mold (10) and are positioned at the upper sides of the semi-outer pipe mold (4) and the inner pipe mold (10), fixing the reinforcing steel bars (3) by using tools, and finally enabling a plurality of vibration columns (12) to extend into the space between the semi-outer pipe mold (4) and the inner pipe mold (10) until the lower ends of the vibration columns (12) are in;
step two, concrete pouring: pouring concrete with the strength of C30 between the pair of half outer pipe molds (4) and the inner pipe mold (10), and starting the vibration column (12) during pouring to vibrate the vibration column (12) until the pouring is finished;
step three, generating a through hole: standing for 1-3 hours at normal temperature, starting the vibration column (12) again, and simultaneously pulling out the vibration column (12) from the space between the half outer pipe mould (4) and the inner pipe mould (10) until the vibration column (12) is completely separated from the concrete poured in the step two;
step four, maintaining and demolding: curing according to a conventional curing method, detaching a pair of half outer pipe molds (4) during demolding, shearing redundant reinforcing steel bars (3), taking out the inner pipe mold (10) to complete demolding, continuously curing the porous cement pipe (1) by frequently spraying water after demolding, covering the porous cement pipe with a film, and continuously curing for more than one week to prevent concrete from drying and cracking;
step five, inspecting and leaving factory: the product delivery inspection items comprise concrete compressive strength, appearance quality, size deviation, internal water pressure and external pressure inspection, and the product can be delivered after the product quality inspection is qualified;
the upper sides of the vibration columns (12) are provided with lifting mechanisms (11), the lifting mechanisms (11) are fixedly connected with the vibration columns (12), the outer surface of the half outer pipe die (4) is fixedly connected with a plurality of vertical reinforcing ribs (5) and horizontal reinforcing ribs (6) which are uniformly distributed, the vertical reinforcing ribs (5) and the horizontal reinforcing ribs (6) are distributed in a staggered manner, the pair of half outer pipe molds (4) are fixedly connected with fixing blocks (7) which are matched with each other, a pair of clamping holes (8) are drilled on the fixing block (7), the half outer pipe die (4) and the inner pipe die (10) are made of die steel, polishing layers are respectively arranged on the inner side wall of the half outer pipe mould (4) and the outer side wall of the inner pipe mould (10), the surface of the vibration column (12) is coated with a polytetrafluoroethylene coating, and the thickness of the polytetrafluoroethylene coating is 0.5-1.5 mm.
2. The cellular cement pipe as claimed in claim 1, wherein: the raw materials of the concrete comprise water, cement, sand, stones and concrete additives.
3. The cellular cement pipe as claimed in claim 1, wherein: the cement surplus coefficient of the concrete is 1.00, the maximum particle size of coarse aggregate is 20 mm, the tower density is 35-50 mm, the sand rate is 28-30%, and the water-cement ratio is 0.36-0.39.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470866.3A CN109676752B (en) | 2018-12-04 | 2018-12-04 | Porous cement pipe and manufacturing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470866.3A CN109676752B (en) | 2018-12-04 | 2018-12-04 | Porous cement pipe and manufacturing process thereof |
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| Publication Number | Publication Date |
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| CN109676752A CN109676752A (en) | 2019-04-26 |
| CN109676752B true CN109676752B (en) | 2021-04-13 |
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| CN201811470866.3A Active CN109676752B (en) | 2018-12-04 | 2018-12-04 | Porous cement pipe and manufacturing process thereof |
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