CN112643850B - Preparation process of concrete prefabricated part - Google Patents
Preparation process of concrete prefabricated part Download PDFInfo
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- CN112643850B CN112643850B CN202011541769.6A CN202011541769A CN112643850B CN 112643850 B CN112643850 B CN 112643850B CN 202011541769 A CN202011541769 A CN 202011541769A CN 112643850 B CN112643850 B CN 112643850B
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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
- 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
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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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/22—Moulds for making units for prefabricated buildings, i.e. units each comprising an important section of at least two limiting planes of a room or space, e.g. cells; Moulds for making prefabricated stair units
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- Engineering & Computer Science (AREA)
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- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The application relates to a preparation process of a concrete prefabricated part, relating to the field of concrete structures and comprising the following steps: step S1: preparing a mold in advance, wherein the mold is provided with a first mold cavity and a second mold cavity; preparing concrete in a storage tank; step S2: injecting concrete into the first mold cavity by using the storage tank to enable the first mold cavity to be filled with the concrete; step S3: injecting concrete into the second mold cavity by using the storage tank, and simultaneously injecting water until the second mold cavity is filled with the concrete, and uniformly stirring the concrete in the second mold cavity; a forming step: and waiting for the concrete in the first die cavity and the second die cavity to be solidified. The preparation process can produce two concrete prefabricated parts with different water contents at one time, only one mould and one material storage tank are used, the occupied area of equipment can be reduced, the waste of concrete raw materials when the concrete raw materials are not used is reduced, and the preparation process has the advantages of energy conservation and environmental protection; the fastener is embedded in the concrete prefabricated member, so that the concrete prefabricated member can be conveniently lifted and installed; the connecting strength of the fastener and the concrete prefabricated member is high.
Description
Technical Field
The application relates to the field of concrete structures, in particular to a preparation process of a concrete prefabricated part.
Background
The concrete prefabricated member is a prefabricated building member outside a construction site, can be directly installed in a building for use, has the advantage of saving the site construction time, and has better quality as the prefabricated member.
The utility model discloses a chinese utility model patent that grant publication number is CN208305325U discloses a precast concrete member mould, including the base, the base top surface is equipped with a plurality of templates, and the precast concrete mould is constituteed to a plurality of templates, is equipped with template support piece on the base top surface in the template outside, swing joint between template support piece and the base top surface.
Aiming at the related technologies, the inventor thinks that two moulds are needed when two concrete prefabricated parts with different water contents are produced, and concrete is respectively injected into the two moulds through two hoppers with different contents, so that the defects that the occupied area of equipment is large, and the waste is serious when concrete raw materials of the two hoppers are not used completely exist.
Disclosure of Invention
In order to reduce the occupied area of equipment and reduce the waste of concrete raw materials when the raw materials are not used completely, the application provides a preparation process of a concrete prefabricated part.
The application provides a preparation technology of a concrete prefabricated part, which adopts the following technical scheme:
a preparation process of a concrete prefabricated part comprises the following steps:
step S1: preparing a mold in advance, wherein the mold is provided with a first mold cavity and a second mold cavity; preparing concrete in a storage tank;
step S2: injecting concrete into the first mold cavity by using the storage tank to enable the first mold cavity to be filled with the concrete;
step S3: injecting concrete into the second mold cavity by using the storage tank, and simultaneously injecting water until the second mold cavity is filled with the concrete, and uniformly stirring the concrete in the second mold cavity;
a forming step: waiting for the concretes in the first die cavity and the second die cavity to be solidified;
a separation step: and separating the formed concrete prefabricated member from the mold.
By adopting the technical scheme, the preparation process of the concrete prefabricated part can produce two concrete prefabricated parts with different water contents at one time, only one mould and one material storage tank are used, and the occupied area of equipment is reduced; because the concrete in the storage tank can be used for the first die cavity and the second die cavity simultaneously, the waste of the concrete raw materials can be reduced when the concrete raw materials are not used completely.
Optionally, the method further includes, after the step S3, step S4: and a suspender is arranged at the top of the mould, and two ends of the suspender are respectively fixed with two ends of the mould.
By adopting the technical scheme, after the concrete is injected into the mould, the mould and the content are transported to a certain position for standing, so that the subsequent production is not influenced. The hoisting ring is used as a force application position of the hoisting equipment, so that the hoisting equipment can be conveniently hoisted.
Optionally, the jib can be dismantled and be provided with many auxiliary rods, the cross section outline of auxiliary rod is circular, the bottom of auxiliary rod is equipped with the screw hole, screw hole female connection has the fastener, in fastener and the embedding concrete of auxiliary rod lower extreme before the shaping step, make auxiliary rod and the separation of concrete prefabricated member through rotatory auxiliary rod after the shaping step is accomplished.
Through adopting above-mentioned technical scheme, the back is accomplished in the shaping step, and in the canned paragraph inlay of fastener was established and is fixed in the precast concrete spare, personnel made auxiliary rod and precast concrete spare separation through rotatory auxiliary rod, then the top surface of precast concrete spare is bared to the screw thread section. The thread section is used for being connected with a thread sleeve of hoisting equipment, so that the concrete prefabricated part can be conveniently hoisted and installed.
Optionally, the auxiliary rod is an elastic rod with a hollow interior, the hollow portion of the auxiliary rod is a middle cavity, the middle cavity is not communicated with the threaded hole, and the middle cavity penetrates through the auxiliary rod upwards; step S5 is provided after the step S4: inserting a hard core rod into the middle cavity to enable the auxiliary rod to generate outward expansion deformation along the radial direction; and after the molding step is finished, the core rod is pulled out, and then the auxiliary rod is taken out.
By adopting the technical scheme, before the concrete is solidified, the core rod is inserted into the auxiliary rod to enable the auxiliary rod to expand outwards; the core bar is pulled out after the concrete solidifies, and the auxiliary rod spontaneously generates inward-shrinkage deformation due to elasticity, so that the outer wall of the auxiliary rod is easily separated from the solidified concrete, and the auxiliary rod is conveniently separated from the formed concrete prefabricated member.
Optionally, the suspension rod is provided with a through hole for the auxiliary rod to pass through, the top of the auxiliary rod is provided with an outward-turned folded edge, and the folded edge abuts against the edge of the top orifice of the through hole; and after the step of pulling out the core rod, the folded edge is deformed to pass through the through hole by pulling up the suspender.
Through adopting above-mentioned technical scheme, the auxiliary rod can carry out the dismouting with the jib through removing, and the auxiliary rod inserts behind the through-hole hem and fixes a position with the top edge of through-hole, places the auxiliary rod and continues to drop downwards. After the concrete is solidified, the step of pulling out the core bar is followed by pulling up the suspender to enable the folded edge to deform and pass through the through hole, thereby conveniently realizing the separation of the auxiliary rod and the suspender. At the moment, the auxiliary rod is still fixed in the concrete prefabricated member, and the hanging rod is removed, so that an operation space is provided for subsequently removing the auxiliary rod.
Optionally, the bottom of the auxiliary rod is provided with a plurality of extrusion holes communicated with the middle cavity; in the step S5, firstly, the fiber concrete is injected into the middle cavity, and then the core rod is inserted, and the core rod is inserted into the middle cavity to completely fill the space in the middle cavity.
By adopting the technical scheme, after the core rod is inserted into the auxiliary rod, the core rod is used as a piston in the middle cavity, the fiber concrete in the middle cavity is extruded out of the extrusion hole, and the fiber concrete is extruded and then diffused all around. Because the fibre concrete distributes beside the fixed segment, the fibre plays the reinforcing effect between fixed segment, concrete prefabricated component after solidifying together, prevents that concrete prefabricated component from producing the fracture at fixed segment department.
Optionally, a protruding rod corresponding to the shape of the extrusion hole is fixed on the core rod, and the protruding rod just fills the space in the extrusion hole after the core rod is completely inserted into the middle cavity.
By adopting the technical scheme, the inner space of the middle cavity is completely filled after the core rod is inserted into the middle cavity, and the convex rod just fills the inner space of the extrusion hole, so that the fiber concrete in the middle cavity is completely extruded, the fiber concrete is not easy to solidify in the extrusion hole, and the resistance of the follow-up dismantling of the auxiliary rod is reduced.
Optionally, the fastener includes a threaded section in threaded connection with the threaded hole, and a fixing section fixed to a lower end of the threaded section, and the fixing section extends radially outward along the threaded section.
By adopting the technical scheme, the fixed section extends outwards along the thread section in the radial direction, and the connection strength between the solidified concrete and the fastener is higher; and the fiber concrete is extruded and then is diffused radially to the periphery under the blocking and guiding action of the fixed section, so that the connection strength of the fastener and the concrete prefabricated member can be further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the preparation process can reduce the occupied area of equipment and reduce the waste of concrete raw materials when the raw materials are not used completely;
2. the fastener is embedded in the concrete prefabricated member, so that the concrete prefabricated member can be conveniently lifted and installed;
3. the connecting strength of the fastener and the concrete prefabricated member is high.
Drawings
Fig. 1 is a schematic view of step S1 of the preparation process of a concrete precast element of the embodiment.
Fig. 2 is an exploded view of the mold of the example.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a schematic view illustrating a process of inserting the auxiliary rod into the core bar according to the embodiment.
Fig. 5 is a partial view of the concrete preform of the example after production is completed.
Description of reference numerals: 1. a mold; 11. a first die cavity; 12. a second die cavity; 2. a material storage tank; 21. a material guide channel; 3. a boom; 31. a hoisting ring; 32. a through hole; 4. an auxiliary lever; 41. a middle cavity; 42. folding edges; 43. a threaded hole; 5. a fastener; 51. a threaded segment; 52. a fixed section; 44. an extrusion orifice; 6. a core bar; 61. a nose bar; 62. fiber concrete.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a preparation process of a concrete prefabricated part, which comprises the following steps:
step S1: referring to fig. 1, a mold 1 is prepared in advance, and concrete is prepared in a storage tank 2. Be equipped with die cavity one 11, die cavity two 12 on the mould 1, die cavity one 11 is located die cavity two 12 horizontal direction one side, and the top of die cavity one 11, die cavity two 12 is all uncovered, and wherein die cavity one 11 is used for the concrete prefabricated member of shaping moisture content lower relatively, and die cavity two 12 is used for the concrete prefabricated member of shaping moisture content higher relatively. The concrete in the storage tank 2 is consistent with the prefabricated part material to be formed in the first die cavity 11, namely the concrete in the storage tank 2 is of a grade with relatively low water content.
Step S2: and (5) injecting concrete into the first die cavity 11 by using the material storage tank 2, so that the first die cavity 11 is filled with the concrete. The concrete is injected by adopting a material guide channel 21, the upper end of the material guide channel 21 is connected to the discharge hole of the material storage tank 2, and the lower end of the material guide channel 21 is connected to the first die cavity 11.
Step S3: and connecting the lower end of the guide channel 21 to the second die cavity 12, injecting concrete into the second die cavity 12 by using the storage tank 2, and simultaneously injecting water until the second die cavity 12 is filled. The amount of water injected into the second cavity 12 is measured in advance, water is added to the upper end of the material guide channel 21 while the concrete is injected, and the material in the material guide channel 21 is stirred by a stirrer (not shown in the figure), so that the concrete and the newly added water are directly and uniformly mixed in the material guide channel 21. And (3) controlling the adding speed and the adding amount of water, closing a discharging valve of the storage tank 2 after the final concrete amount passes through the material guide channel 21, flushing the material guide channel 21 with the residual water, flushing the material guide channel 21 completely, and enabling the flushed water and concrete to enter the second die cavity 12 so that the second die cavity 12 is just filled with the concrete. And then further stirring the concrete in the second die cavity 12 to make the concrete uniform, wherein the water content of the concrete in the second die cavity 12 corresponds to the concrete prefabricated member to be formed.
Step S4: referring to fig. 2 and 3, two hanger rods 3 are installed at the top of the mold 1, the hanger rods 3 are in a door shape, two ends of each hanger rod 3 are respectively fixed with two ends of the mold 1 through bolts, the two hanger rods 3 are arranged in parallel, and a hanging ring 31 is fixed at the top of each hanger rod 3. The jib 3 is equipped with two through-holes 32 along vertical direction, two through-holes 32 are located die cavity one 11 respectively, die cavity two 12 directly over, wear to be equipped with auxiliary rod 4 in the through-hole 32, auxiliary rod 4 is made by having elastic macromolecular material, for example, polyurethane, need choose for use polyurethane to choose for use relatively harder kind when 4 materials of auxiliary rod, need choose for use relatively softer kind when selecting for use plastics as 4 materials of auxiliary rod, can produce elastic deformation when radial atress to the requirement of auxiliary rod 4, nevertheless difficult distortion when twisting. The surface of the auxiliary rod 4 is coated with a waterproof coating material to reduce adhesion to concrete.
The auxiliary bars 4 corresponding to the first and second cavities 11 and 12 have the same structure, and only the auxiliary bar 4 of the first cavity 11 will be described: the outer profile of the cross section of the auxiliary rod 4 is circular, the lower end of the auxiliary rod 4 extends into the first die cavity 11, and the outer diameter of the bottom end of the auxiliary rod 4 is gradually reduced to form a fillet shape. The interior of the auxiliary rod 4 is hollow, the hollow part of the auxiliary rod 4 is a middle cavity 41, the middle cavity 41 upwards penetrates through the auxiliary rod 4, an outward-turned folded edge 42 is integrally fixed at the top of the auxiliary rod 4, and the folded edge 42 is abutted against the edge of the top opening of the through hole 32 so as to prevent the auxiliary rod 4 from downwards sliding away from the through hole 32; the auxiliary rod 4 can be detached from the hanger rod 3 by vertical movement.
The bottom end of the auxiliary rod 4 is provided with a threaded hole 43, the threaded hole 43 is not communicated with the middle cavity 41, a fastening piece 5 is connected in the threaded hole 43 in a threaded mode, the fastening piece 5 comprises a threaded section 51 in threaded connection with the threaded hole 43 and a fixing section 52 fixed to the lower end of the threaded section 51, and the fixing section 52 extends outwards in the radial direction along the threaded section 51. The bottom of the auxiliary rod 4 is provided with a plurality of extrusion holes 44 communicated with the middle cavity 41, the lower ends of the extrusion holes 44 are opposite to the fixed section 52, and a gap is reserved between the lower orifice of the extrusion hole 44 and the fixed section 52.
When step S4 is performed, the fastening member 5 is first installed at the bottom of the auxiliary rod 4, and then the auxiliary rod 4 is inserted into the through hole 32 from top to bottom, so that the fastening member 5 and the lower end of the auxiliary rod 4 are inserted into the unset concrete, and the fastening member 5 does not protrude from the top surface of the concrete.
Step S5: referring to fig. 3 and 4, fiber concrete 62 is injected into the middle chamber 41, the fiber concrete 62 is liquid slurry when being injected, and the fiber concrete 62 is a cement-based composite material using fibers as a reinforcing material. Taking a hard core rod 6 made of metal, wherein the outer diameter of the core rod 6 is slightly larger than the original inner diameter of the middle cavity 41, a convex rod 61 corresponding to the shape of the extrusion hole 44 is fixed at the bottom of the core rod 6, the inner space of the middle cavity 41 is completely filled after the core rod 6 is inserted into the middle cavity 41, and the convex rod 61 just fills the inner space of the extrusion hole 44. In the process of inserting the core rod 6, the outer wall of the core rod 6 is in sliding fit with the inner wall of the middle cavity 41, the core rod 6 is used as a piston in the middle cavity 41, the fiber concrete 62 in the middle cavity 41 is extruded out of the extrusion hole 44, and the fiber concrete 62 is radially diffused to the periphery under the blocking and guiding action of the fixed section 52 after being extruded; and the core rod 6 deforms the auxiliary rod 4 to expand the outer diameter.
A forming step: referring to fig. 2, the mold 1 is lifted by a lifting device, and the mold 1 is transported to a position away from the storage tank 2 together with the content and is left standing, so that the subsequent production is not influenced. The hoist rings 31 serve as a biasing position of the hoisting device and can be moved by the forklift to lift the mold 1. And waiting for the concrete in the first mold cavity 11 and the second mold cavity 12 to be solidified, and carrying out watering maintenance in the solidification process.
After the concrete is solidified, referring to fig. 4 and 3, the core rod 6 is firstly pulled out, then the hanger rod 3 is detached from the mould 1, the folded edge 42 is deformed to pass through the through hole 32 by pulling up the hanger rod 3, at the moment, the auxiliary rod 4 is separated from the hanger rod 3, and the auxiliary rod 4 is still inserted into the concrete prefabricated member.
Because the core rod 6 is pulled out in advance, the auxiliary rod 4 spontaneously generates retraction deformation due to elasticity, so that the outer wall of the auxiliary rod 4 is easily separated from the solidified concrete. The person disengages the threaded hole 43 from the threaded section 51 by rotating the auxiliary rod 4, further separating the auxiliary rod 4 from the concrete preform.
Referring to fig. 5, after the completion, the fixing section 52 of the fastener 5 is embedded in the concrete prefabricated member, the thread section 51 is exposed on the top surface of the concrete prefabricated member but not on the top surface of the concrete prefabricated member, the thread section 51 is used for being connected with a thread sleeve of a hoisting device, the concrete prefabricated member is convenient to hoist and mount, no binding band or iron chain is needed in the hoisting process, the concrete prefabricated member is convenient to hoist, and the outer wall of the concrete prefabricated member is not easy to damage. Because the fiber concrete 62 is radially distributed beside the fixed section 52, the fiber can play a role in reinforcing between the fixed section 52 and the concrete prefabricated member after being solidified together, and the concrete prefabricated member is prevented from being broken at the fixed section 52. Since the fastening member 5 does not protrude from the surface of the concrete preform, the fastening member 5 does not interfere with the installation and use of the concrete preform.
A separation step: referring to fig. 2, after each side plate of the mold 1 is removed, the concrete prefabricated member is pulled upwards to separate from the mold 1, and the first mold cavity 11 and the second mold cavity 12 respectively produce two concrete prefabricated members with different water contents.
In conclusion, by the preparation process of the concrete prefabricated part, two concrete prefabricated parts with different water contents can be produced at one time, and only one mould 1 and one material storage tank 2 are used, so that the occupied area of equipment is reduced; because the concrete in the storage tank 2 can be used for the first die cavity 11 and the second die cavity 12, the waste of the concrete raw material when the concrete raw material is not used can be reduced, and the waste of the concrete raw material when the guide channel 21 is flushed can also be reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A preparation process of a concrete prefabricated part is characterized by comprising the following steps: the method comprises the following steps:
step S1: a mould (1) is prepared in advance, and a first mould cavity (11) and a second mould cavity (12) are arranged on the mould (1); preparing concrete in the material storage tank (2);
step S2: injecting concrete into the first die cavity (11) by using the material storage tank (2) to fill the first die cavity (11) with the concrete;
step S3: injecting concrete into the second die cavity (12) by using the material storage tank (2), simultaneously injecting water until the second die cavity (12) is filled, and uniformly stirring the concrete in the second die cavity (12);
step S4: a suspender (3) is arranged at the top of the mould (1), and two ends of the suspender (3) are respectively fixed with two ends of the mould (1); the suspension rod (3) is detachably provided with a plurality of auxiliary rods (4), the cross section outline of each auxiliary rod (4) is circular, the bottom end of each auxiliary rod (4) is provided with a threaded hole (43), and a fastener (5) is connected with the threaded hole (43) in an internal thread manner;
embedding the lower ends of the fastener (5) and the auxiliary rod (4) into concrete;
a forming step: waiting for concrete in the first die cavity (11) and the second die cavity (12) to be solidified; after the concrete precast member is finished, the auxiliary rod (4) is separated from the concrete precast member by rotating the auxiliary rod (4);
a separation step: and separating the formed concrete prefabricated member from the mould (1).
2. The process for producing a concrete precast element according to claim 1, characterized in that: the auxiliary rod (4) is an elastic rod with a hollow interior, the hollow part of the auxiliary rod is a middle cavity (41), the middle cavity (41) is not communicated with the threaded hole (43), and the middle cavity (41) penetrates through the auxiliary rod (4) upwards; step S5 is provided after the step S4: inserting a hard core rod (6) into the middle cavity (41) to enable the auxiliary rod (4) to generate outward expansion deformation along the radial direction; after the molding step is finished, the core rod (6) is pulled out, and then the auxiliary rod (4) is taken out.
3. The process for producing a concrete precast element according to claim 2, characterized in that: the suspension rod (3) is provided with a through hole (32) for the auxiliary rod (4) to pass through, the top of the auxiliary rod (4) is provided with an outward-turned folded edge (42), and the folded edge (42) abuts against the edge of a top opening of the through hole (32); after the step of pulling out the core rod (6), the hems (42) are deformed to penetrate through the through holes (32) by pulling up the suspender (3).
4. The process for producing a concrete precast element according to claim 2, characterized in that: the bottom of the auxiliary rod (4) is provided with a plurality of extrusion holes (44) communicated with the middle cavity (41); in the step S5, the fiber concrete (62) is injected into the middle cavity (41), and then the core rod (6) is inserted, wherein the core rod (6) is inserted into the middle cavity (41) and then completely fills the space in the middle cavity (41).
5. The process for producing a concrete precast element according to claim 4, characterized in that: and a convex rod (61) corresponding to the shape of the extrusion hole (44) is fixed on the core rod (6), and the convex rod (61) just fills the space in the extrusion hole (44) after the core rod (6) is completely inserted into the middle cavity (41).
6. The process for producing a concrete precast element according to claim 1, characterized in that: the fastener (5) comprises a threaded section (51) in threaded connection with the threaded hole (43), and a fixing section (52) fixed to the lower end of the threaded section (51), wherein the fixing section (52) extends outwards along the radial direction of the threaded section (51).
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| CN202011541769.6A CN112643850B (en) | 2020-12-23 | 2020-12-23 | Preparation process of concrete prefabricated part |
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| CN202011541769.6A CN112643850B (en) | 2020-12-23 | 2020-12-23 | Preparation process of concrete prefabricated part |
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| CN112643850B true CN112643850B (en) | 2022-03-11 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09267317A (en) * | 1996-04-01 | 1997-10-14 | Daiwa:Kk | Manufacture of precast concrete foundation and device for manufacture thereof |
| CN206765067U (en) * | 2017-05-24 | 2017-12-19 | 深圳市鹏城建筑集团有限公司 | A kind of mounting structure that built-in fitting is fixed in prefabricated concrete elements |
| CN207711015U (en) * | 2017-11-09 | 2018-08-10 | 广州市世博建筑工程有限公司 | A kind of steel construction precast stair production mould |
| CN208576020U (en) * | 2018-06-22 | 2019-03-05 | 江苏东尚住宅工业有限公司 | A kind of prefabricated board being embedded with fastener |
| CN110466050B (en) * | 2019-08-02 | 2020-09-11 | 天一建设发展有限公司 | Movable tool for producing concrete prefabricated part |
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